strong electric winch
2013年7月22日星期一
Electric hoist rope guide the design and production
wire rope hoist rope guide works are similar, guide rope itself does not rotate. When the spool rotates, with the rope wound driven by the axial movement of the thread groove, to keep the rope is wound into precisely, the spiral groove leads to the roll, wire rope by the guide gap discharge. However, this form of guide rope in use relatively high failure rate. The reason is mainly in connection rod guide rope slide, guide rope and wire rope on the drum winding movement can not be synchronized due. In order to reduce the occurrence of such failure on the guide rope design forms a useful improvement.
Single-layer winding Rope hoist rope guide should be set; when using rope guide, you should be able to ensure that when the hook down, no other external force rope, wire rope rope guide can still freely from the outlet of the discharge, when the lifting, down load, Wire rope on the drum axis of the vertical angle of ± 3 °, to work properly.
No guide rope wound caused chaos rope, the rope ends into the roll gap will be compressional deformation; ramp causing chaos hanging rope, wire rope deformation, wire rope wear between the drum shell.
The role of reel lifting mechanism is used to winding wire, power transmission, and the rotary motion into linear motion. Roll surface is usually cut helical groove helix angle which is generally 3 ° -4 °, to increase the contact area of wire rope, and to prevent friction between the adjacent wire, to improve the life of the rope. Since the roll out of the spiral grooves cut rope guide also features that make wire rope can be ordered. But often in the absence of other supporting institutional synergies, wound on the reel will jump rope spiral groove, making rope row chaos; sometimes ends of rope into the roll gap is compressional deformation; also have rope skipping Several spiral groove;
irregular arrangement, causes rope, roll wear deformation; short, this will affect the drum, the Wire rope used, thus shortening the life of the crane.
Fairlead novel design, simple structure, easy installation and maintenance quick, long life cycle, low failure rate, with practical features. As technology advances, the guide rope structure is also a corresponding increase, assembly, repair and replacement easier. Some parts began to use the strength and resiliency of high-strength plastic, instead of the previous cast iron materials, and also added a wear-reducing additive, roller and rolling friction between the rope, the wear of the wire greatly reduced.
2013年7月19日星期五
Five Steps to do more to force the efficiency of electric hoist
With the continuous development of China's economic construction, for increasing the intensity of construction, and this led directly to the manufacturer for various engineering needs of the
hoist equipment with the construction and road building industry continues to flourish, we believe that market demand for the hoist will continue to increase.
lift hoist the current domestic market, growing at an average annual growth rate of 30 per cent, has now become the world's major powers Wire rope hoist needs one, whether in road transportation construction, energy, hydraulic opening, or urban construction Among other aspects of infrastructure have applications, but with the hoist market demand increased year by year, the project market is vast. And in such a hot market in which, and how to be able to seize the opportunity and numerous contests hoist it? We should be through technology and quality, brand three elements of market breakthrough point, continue to produce new products, consolidate the market share of the hoist, for enterprises to increase new growth points of interest.
For electric hoist you know how to be able to operate the actual play its biggest role, thus to improve the work efficiency do? lifting for you, do five steps to make your electric hoist production more to the force, more efficient.
Before you use every day, first try to empty (the purpose to protect the safety of electric hoist)
1, buttons Parking: off sensitive and reliable, consistent action buttons labeled with gourds.
2, limit action: reliable, accurate, reliable and accurate protection of electric hoist safe operation.
3, operation: lift reducer sound normal, motor brake, reliable, flexible trolleys, electric hoist protection when normal operation and safety.
4, wire rope: Must wrapped properly, guide rope rope reliable, not chaos rope, wire rope arranged to prevent confusion or unusual behavior causes accidents.
5, the hook: the swiveling flexible (pulley rotation flexibility, hook should be able to pan 360 °, vertical hook swing 180 °, so that Rope hoist work more flexible.)
lift hoist the current domestic market, growing at an average annual growth rate of 30 per cent, has now become the world's major powers Wire rope hoist needs one, whether in road transportation construction, energy, hydraulic opening, or urban construction Among other aspects of infrastructure have applications, but with the hoist market demand increased year by year, the project market is vast. And in such a hot market in which, and how to be able to seize the opportunity and numerous contests hoist it? We should be through technology and quality, brand three elements of market breakthrough point, continue to produce new products, consolidate the market share of the hoist, for enterprises to increase new growth points of interest.
For electric hoist you know how to be able to operate the actual play its biggest role, thus to improve the work efficiency do? lifting for you, do five steps to make your electric hoist production more to the force, more efficient.
Before you use every day, first try to empty (the purpose to protect the safety of electric hoist)
1, buttons Parking: off sensitive and reliable, consistent action buttons labeled with gourds.
2, limit action: reliable, accurate, reliable and accurate protection of electric hoist safe operation.
3, operation: lift reducer sound normal, motor brake, reliable, flexible trolleys, electric hoist protection when normal operation and safety.
4, wire rope: Must wrapped properly, guide rope rope reliable, not chaos rope, wire rope arranged to prevent confusion or unusual behavior causes accidents.
5, the hook: the swiveling flexible (pulley rotation flexibility, hook should be able to pan 360 °, vertical hook swing 180 °, so that Rope hoist work more flexible.)
Bridge crane leakage protection and restoration wear governance
Bridge crane leakage protection and restoration wear governance
Leak repair protection
Bridge hoist and trolley gear due to vibration, abrasion, pressure, temperature and other factors, the combination of surface sealing parts often appear static leakage. Traditional treatment methods to remove reducer, replacing gaskets or sealant applied, but time-consuming and difficult to ensure the sealing effect, will appear again in the operation of leakage. Contemporary Western countries use more polymer composites leakage field of governance, the most widely Blessed World Blue series. Polymer-free disassembly repair and materials have excellent adhesion, oil resistance and 350% elongation, good to overcome the impact of vibration reducer, repair effect is more effective than traditional methods.
Wear governance
Bridge Hoist equipment initiative running gear wheels and carts frequently repeated emergency stop and parking will cause reverse gear torque of each axis, vibration increases, could easily lead to leakage. Such problems occur, the traditional method and more to be machined after welding or repair the main brush, but there are some drawbacks both: high thermal stress generated by welding can not be completely eliminated, prone to bend or break; the brush plated by the coating thickness limit is easily peeled off, and the above two methods are metal with metal repair, you can not change the "hard to hard" with the relationship, the combined effect of the force, will cause wear again. Latest repair methods mostly based polymer composites, which has superior adhesion, excellent compressive strength and other performance. Applied Polymer repaired, neither welding thermal stress on the repair thickness is not restricted, while products with metallic materials do not have the concession, can absorb shock and vibration hoist equipment , to avoid the possibility of re-wear and greatly extended lift hoist equipment component life, save a lot of down time, creating significant economic value.
Calculating overhead crane big wheel pressure factors to be considered
Calculating overhead crane big wheel pressure factors to be considered
How large number of construction plant cost savings presumably each investor concerns, how to more accurately calculate the overhead crane big wheel pressure:
(1) if the maximum lifting load, which should be based on the actual needs of the Hoist and trolley position calculation. In general, when the crane lifting the maximum load, often in a car near the middle of the main beam, then the cart wheel pressure is clearly better than the car is in the end when the main beam is much smaller.
(2) If the car runs to the end of the main beam, the load should be based on the actual amount of time to calculate. In general, when the car runs to the end of the main beam, it is usually not lifting the maximum load, then the cart wheel pressure is clearly better than lifting the maximum load is much smaller.
(3) If the hoist and trolley is neither lifted nor maximum load is the minimum load, and run in the middle of the main beam and the end portion.
In summary, in the past on the bridge lift hoist carts wheel pressure calculation method is not perfect, accuracy is poor, resulting in calculated crane wheel pressure is too large, plant design is too conservative and caused a lot of waste. Improve security should be based on the correct algorithm and the use of advanced technological means and the right measures to complete (such as increasing the safety factor, increasing the limit and warning measures). This will not only reduce the maximum Hoist equipment wheel pressure, and can save a lot of ground plant cost.
How large number of construction plant cost savings presumably each investor concerns, how to more accurately calculate the overhead crane big wheel pressure:
(1) if the maximum lifting load, which should be based on the actual needs of the Hoist and trolley position calculation. In general, when the crane lifting the maximum load, often in a car near the middle of the main beam, then the cart wheel pressure is clearly better than the car is in the end when the main beam is much smaller.
(2) If the car runs to the end of the main beam, the load should be based on the actual amount of time to calculate. In general, when the car runs to the end of the main beam, it is usually not lifting the maximum load, then the cart wheel pressure is clearly better than lifting the maximum load is much smaller.
(3) If the hoist and trolley is neither lifted nor maximum load is the minimum load, and run in the middle of the main beam and the end portion.
In summary, in the past on the bridge lift hoist carts wheel pressure calculation method is not perfect, accuracy is poor, resulting in calculated crane wheel pressure is too large, plant design is too conservative and caused a lot of waste. Improve security should be based on the correct algorithm and the use of advanced technological means and the right measures to complete (such as increasing the safety factor, increasing the limit and warning measures). This will not only reduce the maximum Hoist equipment wheel pressure, and can save a lot of ground plant cost.
Lost crane accident refers to the lifting operation, the suspended load,spreaders and other heavy objects falling from the sky caused personal injury and equipment damage accident.
Lost hoist equipment accident refers to the lifting operation, the suspended load,spreaders and other heavy objects falling from the sky caused personal injury and equipment damage accident.
Common Lost incidents have the following types:
1 off the rope accident
Accident off the rope is tied for lifting heavy objects from falling off the rope damage accident casualties occurred collapsing. The main reason causing the accident off the rope is tied heavy improper methods and essentials, causing heavy spondylolisthesis; lifting the inappropriate choice of the center of gravity, resulting in partial load lifting or lift hoist center due to instability caused by heavy objects falling; suspended load was collision, impact, vibration and swing, resulting in weight loss and so on.
2, decoupling accident
Decoupling accident is heavy, hoisting rope or a dedicated spreader hook hook from the mouth prolapse caused heavy loss incidents. The main reason for the accident was caused by decoupling the lack of retaining hook hook device; retaining hook protection device functional failure; improper methods and hook lifting hook mouth opening is too large deformation due to other reasons.
3, broken rope accident
Hoisting rope breaking caused the main reason for the overload lifting pull off multi-rope; starting position switch malfunctions ceiling pull off over winding rope; oblique hanging, causing chaos oblique cut rope rope crushing; Wire rope due to the lack of maintenance of long-term use cause fatigue deformation, wear damage, etc. to meet or exceed the standard still used scrap breaking caused the accident.
Causing the main hoisting rope breaking much more for the lifting angle> 120 degrees, so that the tensile strength exceeds the limit while hoisting rope pull off; hoisting rope inappropriate choice of varieties and specifications, or have reached retirement still using standard wire rope lifting heavy bundles cause hoisting rope breaking; hoisting rope and heavy with no gasket between the contact points and other protection measures, resulting in the emergence of angular cut rope hoisting rope breaking incidents.
4, hook breaking accident
Breaking hook hook fracture accident is an accident caused by weight loss. Cause of the accident caused by the breaking hook hook material mostly defective hook area reduction of long-term wear limit has been reached retirement standard but still used frequently overloaded or used, so that the damage caused by fatigue fracture failure.
Lost Hoist equipment accidents occurred mainly during the hoisting mechanism extracts winding system, in addition to rope off, decoupling, off the ropes and off the hook, but each hoisting rope fixed at both ends is also very important, such as wire rope on the drum limit can guarantee safety ring for more than 2 laps, whether a downward limit protection, wire rope on the drum unit wedge plate fixed and fixed structural safety and reasonable. Another rope off the tank (from the rope drum groove) or hoist and trolley off the wheel (from the pulley> Lost accident accident will occur.
Tower crane - crane installation and removal techniques
Tower crane - crane installation and removal techniques
Construction site, to address the construction phase of the vertical transport, accelerate the construction progress, improve the level of modern construction mechanized operations, according to the actual situation of the construction site, usually in the middle of the building or side installation of certain stationary Hoist equipment .
Set of standard tower crane installation, dismantling and operation of technical safety tests, vital, and we must project department technicians are highly valued. This combined with the actual, to talk about the actual work installation, dismantling and operation of technical safety tests, procedures and content.
One, indicating
The installation as normal transitions (or a new purchase), the installation process should be strictly in accordance with the installation and removal programs are not free to change.
Second, the installation sequence
Chassis (with the water level leveling) → → coat rack standard section → → slewing tower cab → → → balance arm balance block (from the top of the tower root nearest location) → boom (including rod, etc., the center of gravity away from the arm root) → balance blocks (all the rest) → Debug → jacking bracing → → → Use acceptance.
Third, the disassembly sequence
Tower crane fall (reduced initial installation height) → balance weight (close to the roots of a tower) → → balance arm balance arm → tower block → → → rotary mechanism → sets the cab stand and standards section → chassis.
Fourth, security measures
Installation (removing) the person in charge before the job by the general organizational learning install security technical requirements for all operations personnel conduct technical tests, daily work content on sub-tests, one by one: Go to the job site must wear helmets, high-altitude operations to fasten seat belts, wear non-slip shoes; case of overhead transmission lines should be taken to keep a safe distance; top wind speed greater than 13 m / s prohibition operations; sets of planes, the upper and lower bearings, front and rear arms and other equipment before lifting operations, the technical person in charge must be carried out special safety technical tests, each hanging about 20 cm from the ground must be shut down, check the security stability, safety and reliability can only confirm to continue lifting; long, large objects hanging points should be accurate to ensure balanced hanging objects, lifting rope before the application of solid bring the two ends tied firmly to prevent heavy rotation, swing and collision; install the operating area of 5 to 10 meters should be located within the security cordon, send someone to guard the construction site, non-operating personnel must not enter cordon.
V. Notes installation and removal
An installation before the technical preparations and precautions
(1) Press the tower hoist equipment foundation design specifications and requests for information, check the quality of the key parts of the foundation construction.
Detection tower crane foundation geometry errors, you should within the allowable range, measuring the level of error size so horn.
Tower crane foundation construction should meet the strength requirements of this scenario.
(2) detailed understanding of the technical condition of installation by crane, crane drivers technical responsible person shall explain the main components of the installation process and lifting the size, weight, height, mutually agreed to stop lift hoist into position, arm length and the elevation and other major technical parameters.
(3) Install responsible person summoned installation personnel hoisting crane crew and command staff meetings to explain the implementation of common safety precautions, special clear crane leg support operations personnel in charge of the leg support must reach a solid firm.
(4) crane installation personnel must be certified before they work, wearing a variety of labor protection products.
(5) hoist and trolley connection between the various parts of the shafts, bolts, nuts, and cotter pin shaft card board manufacturers must use random or specified special pieces, not free themselves replaced.
(2) Before installation personnel and tools preparations
(1) foundation construction: construction shall be identified in the program Taki position to ensure basic settings, foundation bearing capacity ≥ 200kN/m2, ensure dense concrete, anchor position deviation ≤ 2 mm (bolt before installation by using the instructions drawings or construction program request processing). Installation of the tower machine, foundation concrete strength to reach 90%.
(2) attached to the rack focus on concrete strength at ≥ 70% or more, embedded parts buried position deviation ≤ 5 mm.
(3) to protect the construction site according to three criteria with installed power box.
(4) must be overhauled before installation to ensure the good performance of the tower lift hoist Open flat construction sites, roads must be smooth, compacted, and there is sufficient installation personnel.
(5) ready for hoisting machinery, installation tools, auxiliary equipment and technical information.
3 Remove Precautions
(A) demolition job, overall responsibility for all demolition personnel should be organized to re-learn safety precautions, conduct technical tests, the implementation of each task.
(2) demolition workers clear division of responsibilities, their duties, have to concentrate to their work, and the dynamic observation tower on the top down, if the situation immediately stop inspection, fault is not excluded shall not continue to be demolished.
(3) high-altitude operations personnel must wear seatbelts, with non-slip shoes, wear a helmet.
(4) Check the hydraulic system, ensuring stable and normal, without jamming, bugs and other phenomena.
(5) is not reduced to a predetermined height tower demolition, shall be attached to the wall demolition devices.
Six, safety technical measures
The overall responsibility for the organization of all installation (removal) measures to learn the content, conduct technical tests, the implementation of each task.
An installation before the operations, organizational learning installation (removal) security technology solutions for organizations operating personnel for technical solutions correspondent, on the breakdown of work content, technical requirements, safety measures and precautions separate disclosure.
(2) all installation (removal) must obey the unified command of the scene. Unknown if found or an error signal to stop operating, and then carry out the job to be contacted clear.
3 operating personnel trained passing the examination, the driver, lifting conductor, electrical and inspection personnel to certificates, at the job site must wear helmets, seat belts when working at height, with non-slip shoes, winter, anti-slip measures should be taken during the rainy season .
4 encounter with overhead transmission conductor places crane structure should avoid the danger of entering distance transmission wires, such conditions can not guarantee a safe distance, in consultation with the relevant departments to take effective security measures before erection.
5 top wind speed greater than six or more, prohibiting operations. Install the base tower, the case of six wind above, prohibits job.
6. Operating personnel must comply with the rules aerial, Do not drink and posts and other unsafe behavior altitude parabolic.
Seven, staffing and responsibilities
1 The total charge: responsible for the overall arrangements for the organization and coordination of the whole process of installation and removal of safety.
2 Technical Leader: responsible for installing and removing technical tests before the demolition process inspection and supervision (including basic checking), the installation process of testing, installation and post-test data collected.
3 person in charge of production safety: organizational personnel responsible for specific technical rules according to the installation instructions and the requirements of the tower crane operations and conduct process checks, coordination and command. Responsible for safety and operational tests, process safety oversight.
4 Ann disassembly Captain: organization-specific safety procedures by operating personnel, security disassembly process and specification requirements for safe disassembly operations, and pay attention to the process of inspection, coordination and command.
5 Field Command: In the captain of the arrangement, the command is responsible for lifting work.
Construction site, to address the construction phase of the vertical transport, accelerate the construction progress, improve the level of modern construction mechanized operations, according to the actual situation of the construction site, usually in the middle of the building or side installation of certain stationary Hoist equipment .
Set of standard tower crane installation, dismantling and operation of technical safety tests, vital, and we must project department technicians are highly valued. This combined with the actual, to talk about the actual work installation, dismantling and operation of technical safety tests, procedures and content.
One, indicating
The installation as normal transitions (or a new purchase), the installation process should be strictly in accordance with the installation and removal programs are not free to change.
Second, the installation sequence
Chassis (with the water level leveling) → → coat rack standard section → → slewing tower cab → → → balance arm balance block (from the top of the tower root nearest location) → boom (including rod, etc., the center of gravity away from the arm root) → balance blocks (all the rest) → Debug → jacking bracing → → → Use acceptance.
Third, the disassembly sequence
Tower crane fall (reduced initial installation height) → balance weight (close to the roots of a tower) → → balance arm balance arm → tower block → → → rotary mechanism → sets the cab stand and standards section → chassis.
Fourth, security measures
Installation (removing) the person in charge before the job by the general organizational learning install security technical requirements for all operations personnel conduct technical tests, daily work content on sub-tests, one by one: Go to the job site must wear helmets, high-altitude operations to fasten seat belts, wear non-slip shoes; case of overhead transmission lines should be taken to keep a safe distance; top wind speed greater than 13 m / s prohibition operations; sets of planes, the upper and lower bearings, front and rear arms and other equipment before lifting operations, the technical person in charge must be carried out special safety technical tests, each hanging about 20 cm from the ground must be shut down, check the security stability, safety and reliability can only confirm to continue lifting; long, large objects hanging points should be accurate to ensure balanced hanging objects, lifting rope before the application of solid bring the two ends tied firmly to prevent heavy rotation, swing and collision; install the operating area of 5 to 10 meters should be located within the security cordon, send someone to guard the construction site, non-operating personnel must not enter cordon.
V. Notes installation and removal
An installation before the technical preparations and precautions
(1) Press the tower hoist equipment foundation design specifications and requests for information, check the quality of the key parts of the foundation construction.
Detection tower crane foundation geometry errors, you should within the allowable range, measuring the level of error size so horn.
Tower crane foundation construction should meet the strength requirements of this scenario.
(2) detailed understanding of the technical condition of installation by crane, crane drivers technical responsible person shall explain the main components of the installation process and lifting the size, weight, height, mutually agreed to stop lift hoist into position, arm length and the elevation and other major technical parameters.
(3) Install responsible person summoned installation personnel hoisting crane crew and command staff meetings to explain the implementation of common safety precautions, special clear crane leg support operations personnel in charge of the leg support must reach a solid firm.
(4) crane installation personnel must be certified before they work, wearing a variety of labor protection products.
(5) hoist and trolley connection between the various parts of the shafts, bolts, nuts, and cotter pin shaft card board manufacturers must use random or specified special pieces, not free themselves replaced.
(2) Before installation personnel and tools preparations
(1) foundation construction: construction shall be identified in the program Taki position to ensure basic settings, foundation bearing capacity ≥ 200kN/m2, ensure dense concrete, anchor position deviation ≤ 2 mm (bolt before installation by using the instructions drawings or construction program request processing). Installation of the tower machine, foundation concrete strength to reach 90%.
(2) attached to the rack focus on concrete strength at ≥ 70% or more, embedded parts buried position deviation ≤ 5 mm.
(3) to protect the construction site according to three criteria with installed power box.
(4) must be overhauled before installation to ensure the good performance of the tower lift hoist Open flat construction sites, roads must be smooth, compacted, and there is sufficient installation personnel.
(5) ready for hoisting machinery, installation tools, auxiliary equipment and technical information.
3 Remove Precautions
(A) demolition job, overall responsibility for all demolition personnel should be organized to re-learn safety precautions, conduct technical tests, the implementation of each task.
(2) demolition workers clear division of responsibilities, their duties, have to concentrate to their work, and the dynamic observation tower on the top down, if the situation immediately stop inspection, fault is not excluded shall not continue to be demolished.
(3) high-altitude operations personnel must wear seatbelts, with non-slip shoes, wear a helmet.
(4) Check the hydraulic system, ensuring stable and normal, without jamming, bugs and other phenomena.
(5) is not reduced to a predetermined height tower demolition, shall be attached to the wall demolition devices.
Six, safety technical measures
The overall responsibility for the organization of all installation (removal) measures to learn the content, conduct technical tests, the implementation of each task.
An installation before the operations, organizational learning installation (removal) security technology solutions for organizations operating personnel for technical solutions correspondent, on the breakdown of work content, technical requirements, safety measures and precautions separate disclosure.
(2) all installation (removal) must obey the unified command of the scene. Unknown if found or an error signal to stop operating, and then carry out the job to be contacted clear.
3 operating personnel trained passing the examination, the driver, lifting conductor, electrical and inspection personnel to certificates, at the job site must wear helmets, seat belts when working at height, with non-slip shoes, winter, anti-slip measures should be taken during the rainy season .
4 encounter with overhead transmission conductor places crane structure should avoid the danger of entering distance transmission wires, such conditions can not guarantee a safe distance, in consultation with the relevant departments to take effective security measures before erection.
5 top wind speed greater than six or more, prohibiting operations. Install the base tower, the case of six wind above, prohibits job.
6. Operating personnel must comply with the rules aerial, Do not drink and posts and other unsafe behavior altitude parabolic.
Seven, staffing and responsibilities
1 The total charge: responsible for the overall arrangements for the organization and coordination of the whole process of installation and removal of safety.
2 Technical Leader: responsible for installing and removing technical tests before the demolition process inspection and supervision (including basic checking), the installation process of testing, installation and post-test data collected.
3 person in charge of production safety: organizational personnel responsible for specific technical rules according to the installation instructions and the requirements of the tower crane operations and conduct process checks, coordination and command. Responsible for safety and operational tests, process safety oversight.
4 Ann disassembly Captain: organization-specific safety procedures by operating personnel, security disassembly process and specification requirements for safe disassembly operations, and pay attention to the process of inspection, coordination and command.
5 Field Command: In the captain of the arrangement, the command is responsible for lifting work.
Flat cable crane operation method
Flat cable crane operation method
Small hoist equipment lifting objects, only the start of hoist ropes from the object raised to a predetermined height of parking. If you need to move laterally to start driving traction rope winches, two lift hoist in a winch Matsunawa, another tight rope hoist
Small crane lifting objects, only the start of hoist ropes from the object raised to a predetermined height of parking. If you need to move laterally to start driving traction rope winches, two road traction hoist in a winch Matsunawa, another tight rope hoist, pull to avoid the phenomenon of produce, attention must be in accordance with the "first release after the closing, extra undercharged "principle operation. In order to maintain the original height of hanging objects, but also to relax or tighten the lifting control leash. Trolley and heavy lifting operations do not simultaneously. When the object is moved to the required position, while all reels stop, and then control the landing lifting traction rope, so that everything is in place.
Flat cable Hoist equipment Precautions
① parts must be checked before use for wear, rotation is flexible, lubrication is good, and to go through the overload can be used after passing the test.
② Use must be checked before carrying Wire rope specifications, wheel bearing and wheel diameter tank meets the requirements, bearing rope must often coated with grease and graphite powder mixture, in order to reduce friction and prolong life.
③ allow simultaneous lifting heavy objects and horizontal movement.
Small crane flat cable crane load-bearing cable tension calculation
Weight of the load and driving mechanism of the weight concentrated load, while the rope line weight is evenly distributed loads. Assuming the weight of the load and driving are concentrated in the mid-point of load cable, its rope tension can be calculated.
T = (W + Q) L/4f + G L/8f
Where W - lifting load, kN
Q - vehicle weight, kN
G - the total weight of the rope, kN
f - carrying cable deflection, m
L - span, m
Small hoist equipment lifting objects, only the start of hoist ropes from the object raised to a predetermined height of parking. If you need to move laterally to start driving traction rope winches, two lift hoist in a winch Matsunawa, another tight rope hoist
Small crane lifting objects, only the start of hoist ropes from the object raised to a predetermined height of parking. If you need to move laterally to start driving traction rope winches, two road traction hoist in a winch Matsunawa, another tight rope hoist, pull to avoid the phenomenon of produce, attention must be in accordance with the "first release after the closing, extra undercharged "principle operation. In order to maintain the original height of hanging objects, but also to relax or tighten the lifting control leash. Trolley and heavy lifting operations do not simultaneously. When the object is moved to the required position, while all reels stop, and then control the landing lifting traction rope, so that everything is in place.
Flat cable Hoist equipment Precautions
① parts must be checked before use for wear, rotation is flexible, lubrication is good, and to go through the overload can be used after passing the test.
② Use must be checked before carrying Wire rope specifications, wheel bearing and wheel diameter tank meets the requirements, bearing rope must often coated with grease and graphite powder mixture, in order to reduce friction and prolong life.
③ allow simultaneous lifting heavy objects and horizontal movement.
Small crane flat cable crane load-bearing cable tension calculation
Weight of the load and driving mechanism of the weight concentrated load, while the rope line weight is evenly distributed loads. Assuming the weight of the load and driving are concentrated in the mid-point of load cable, its rope tension can be calculated.
T = (W + Q) L/4f + G L/8f
Where W - lifting load, kN
Q - vehicle weight, kN
G - the total weight of the rope, kN
f - carrying cable deflection, m
L - span, m
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