lift hoist machinery safety inspection in two ways, one is the sensory examination; Another is the use of test equipment, instrumentation opponents pull hoist equipment monitoring and control.
1 sensory examination
Lifting hoist machinery safety technical inspection with inspection personnel through very much to see, hear, smell, and asked, touch to proceed. "Lifting hoist mechanical testing procedures" (2002) No. 296 provided for lifting hoist mechanical testing project is more than 70% of the total project sensory testing. Through the senses of seeing, hearing, smell, and asked, touching on the lifting hoist machinery to conduct a comprehensive and intuitive diagnostics, to obtain the necessary information and data.
See: According lifting hoist through the visual characteristics of the mechanical structure and observe the important transmission parts, load-bearing structural elements, fault source megabytes.
Listen: through the auditory analysis of the lifting hoist chain hoist equipment machinery parts running sound is normal, abnormal sound from parts of the judgment, to understand the cause, find out the source of the disease.
Olfactory: smell resolved through lifting hoist mechanical moving parts on-site odors, to identify components overheating, wear, over-burning position.
Q: Ask the driver and associated personnel lifting hoist operation, failure-prone points, after failure, category. Determination lifting hoist safety and technical conditions.
Touch: By touching lifting hoist moving parts, according to the temperature changes, vibration, determine the fault location and nature of the fault.
2 test equipment inspection
According to domestic and international trends lifting hoist machinery, application of modern condition monitoring and fault diagnosis technology has been in lifting hoist machinery design and use widely. In lifting hoist mechanical operation state, the use of monitoring diagnostic instruments and expert monitoring system for lifting hoist machinery for inspection (monitoring) test, to keep the technical condition of lifting hoist, predictable machine or system failure signs and reasons, to eliminate accidents in the bud.
3 lifting hoist components of general safety check
(1) hook.
Check the hook marks and anti-off device meets the requirements, hook cracks, delamination and other defects; hook wear section, the opening degree of the increase in the amount of torsional deformation is exceeded; hook neck and face without fatigue deformation, cracks and associated pin, sleeve wear.
(2) rope.
Check the
Wire rope specifications, models and matching reel pulley meets the design requirements. Rope fixed end plate, Shengka, wedge blocks, etc. rope fixtures meet the requirements. Rope wear, broken wires, kinking, flattening, bending, off shares, corrosion, etc. are exceeded.
(3) brake.
Set the brake, the brake of the type meets the design requirements, the brake lever, the spring without fatigue deformation, cracks and other defects; pins, spindles, brake wheel, brake linings for wear exceeded, hydraulic brake oil leaks ; brake gap adjustment, braking capacity can meet the requirements.
(4) roll.
Roll body, tube edge without fatigue cracks, damage, etc.; rope groove and the cylinder wall wear is excessive; reel flange height and rope winding layers can match; guide rope, rope work schedule meets requirements;
(5) the pulley.
Is there a retaining rope pulley groove means; pulley rope groove, rim cracks, broken edges, excessive wear and other conditions, pulley rotation is flexible.
(6) reducer.
Electric hoist reducer running without intense metal friction sound, vibration, radiation and other unusual sound shell; shaft is sealed intact, loose bolts and other conditions have defects; gear lubricant selection, the oil surface height, vertical deceleration Machine oil pump running, open gear lubrication compliance.
(7) wheels.
hoist and trolley tread, axle whether fatigue crack phenomenon axle wheel tread wear is excessive. Are there eating track running phenomenon. Caused by gnawing track what is the reason.
(8) couplings.
Coupling parts without defects, loose connections, run the impact of the phenomenon. Couplings, pin, shaft pin hole, the buffer rubber ring wear is excessive. Coupling and the connection of the two parts are concentric.
4 lifting hoist safety device checks
(1) overload protection device.
Overload protection devices are sensitive and reliable, meet the design requirements, hydraulic overload protection device opening pressure; machinery, electronics and integrated overload protection alarm, cut off the power source set-point integrated error compliance.
(2) torque limiter.
Boom type torque limiter is anti-overload occurs lifting hoist tipping safety device. Weight gain through increased law or sensitive and reliable method for detecting torque limiter and check torque limiter alarm, cut off the power source set-point integrated error is within the specified range.
(3) limit position limiter.
Check the electric hoist equipment luffing mechanism, lifting mechanism, operation mechanism reaches the set position can occur when the distance alarm signal automatically cut off the power source running dangerous direction.
(4) wind devices.
Boom hinge point for the roots of a height greater than 50 m lifting hoist should check the anemometer, wind speed setpoint is reached or when the ability to accurately operating limit speed alarm. Outdoor work in orbit lifting hoist should check rail clamp, iron shoes, anchoring device of the parts are deformed, defects, and the reliability of its work independently. For automatic rail clamp, you should check for sudden wind gusts devices and carts running with the realization of non-anchor brake state windproof function and reliability of the electrical interlock switch function.
(5) after anti-tipping devices.
The boom and luffing jib type crane hoist should check the Anti-tilting device reliability, electrical interlock sensitivity, check the location and magnitude of amplitude indicator indication accuracy.
(6) buffers.
From the weight of different types, running at different speeds lifting hoist, you should check whether the configured buffer matches and check the integrity of the buffer, run to the ends can simultaneously touch the stopper.
(7) protection.
Check the lifting hoist and the various shields, barriers, guards, ladders, etc. are complete, reliable, lifting hoist on the exposed wound may cause wounding, open drive; couplings, sprockets, chains , belts and other rotating parts without protective cover, lifting hoist Exalted walkways, ladders, and may result in the exposed parts without barriers, whether it meets the requirements. Open for lifting hoist electric chain hoist equipment should be located rain cover.
strong electric winch
2013年7月23日星期二
lift hoist operation most undesirable irregularities
(1) with a
lift hoist lifting or movement of personnel.
(2) lifting flammable, explosive materials and acids.
(3) overload lifting.
(4) using a car hit another car.
(5) from the Wire rope hoist heavy objects thrown down.
(6) Non-driver (no operating permit personnel) operating hoist equipment .
(2) lifting flammable, explosive materials and acids.
(3) overload lifting.
(4) using a car hit another car.
(5) from the Wire rope hoist heavy objects thrown down.
(6) Non-driver (no operating permit personnel) operating hoist equipment .
How to properly hoist installation
After the purchase of
Wire rope hoist installation and commissioning work is certainly one of the steps to use electric hoist, the installation process is the most important Wire rope hoist if properly installed, then the process will later use to save a lot of time, how we can correct installation and commissioning, explain this to you.
A new installation or after installation by dismantling the hoist should be empty commissioning times. In normal use should be carried out at the rated load of one hundred twenty-five%, up from about 100 mm from the ground, ten minutes of static load test and check whether it is normal. Dynamic load test is based on rated load weight for repeated lifting and move around the test, trial and check the mechanical transmission parts, electrical parts and connecting parts are normal and reliable.
2, installation, commissioning and maintenance must be strictly checked limit device is flexible and reliable, when hook up to the upper limit position, the hook from the shell of the housing to the roll must be greater than 50mm.
3, does not allow press both the Wire rope hoist movement in the opposite direction of flashlight door button.
4,10 to 20 tons hoist in the long-term continuous operation, the automatic power-off phenomenon may occur, which belongs to the motor overheating protection function, then you can drop over a period of time until the motor has cooled down you can continue working.
5, after the work is necessary to supply the total gate opened, cut off the power.
6, rope hoist does not work, you can not put heavy objects hanging in the air, to prevent parts produce permanent deformation.
Hoist by hand manipulation, the manipulator should fully grasp the safety rules, non-pulled oblique hanging crooked. Oiled rope should be used when a stiff brush or a small piece of wood is forbidden by hand directly to the working wire rope oiled. And Wire rope hoist to regular inspection, repair, maintenance, the equipment is in good condition at all times, prohibited ill job.
A new installation or after installation by dismantling the hoist should be empty commissioning times. In normal use should be carried out at the rated load of one hundred twenty-five%, up from about 100 mm from the ground, ten minutes of static load test and check whether it is normal. Dynamic load test is based on rated load weight for repeated lifting and move around the test, trial and check the mechanical transmission parts, electrical parts and connecting parts are normal and reliable.
2, installation, commissioning and maintenance must be strictly checked limit device is flexible and reliable, when hook up to the upper limit position, the hook from the shell of the housing to the roll must be greater than 50mm.
3, does not allow press both the Wire rope hoist movement in the opposite direction of flashlight door button.
4,10 to 20 tons hoist in the long-term continuous operation, the automatic power-off phenomenon may occur, which belongs to the motor overheating protection function, then you can drop over a period of time until the motor has cooled down you can continue working.
5, after the work is necessary to supply the total gate opened, cut off the power.
6, rope hoist does not work, you can not put heavy objects hanging in the air, to prevent parts produce permanent deformation.
Hoist by hand manipulation, the manipulator should fully grasp the safety rules, non-pulled oblique hanging crooked. Oiled rope should be used when a stiff brush or a small piece of wood is forbidden by hand directly to the working wire rope oiled. And Wire rope hoist to regular inspection, repair, maintenance, the equipment is in good condition at all times, prohibited ill job.
For lifting hoist five technical parameters
First, from the weight of G
From the weight lifting heavy objects refers to the mass, in kg or t. Can be divided into nominal weight, maximum weight, total weight, effective from the weight and so on.
1. Nominal weight Gn
Rated weight lift hoist can lift spreader or materials with separable attachment (such as grab, electromagnetic chuck, balance beam and other quality combined.
2. Total weight Gz
Total weight of lift hoist can lift spreader and materials can be divided into long-term fixed together in lift hoist on the spreader and drama (including the hook, pulley blocks, lifting wire rope and hoist and trolley in the following other lifting objects) of the total mass.
3. Effective from the weight of Gp
Effective from the weight lift hoist can lift the net mass of the material.
This parameter is required as follows:
First, on the plate lift hoist lifting weight calibration, usually refers to the lift hoist the rated capacity should be eye-catching structure represents a significant lift hoist position.
Second, the type of lifting hoist boom, its nominal weight is varies with the magnitude of its crane lifting torque characteristic index is used to characterize. Signage on the calibration value is the maximum lifting capacity.
Third, with separable spreader (such as grab, electromagnetic chuck, balance beams, etc.) of the lift hoist lifting and material quality of their total rated capacity serving to allow lifting the quality of materials is a valid starting weight.
Two, lifting height H
Lifting height is lift hoist orbit top (or ground) to extract the location of the device limit the vertical distance, in units of m. Usually hook, the hook and loop count to hook center; grapple and other containers, count to bottom of the container.
1. Decreased depth h
When the extract device can be placed below the top surface ground or in orbit, its distance is called devolution down depth. Ie spreader minimum working position and lift hoist horizontal vertical distance between the supporting surface.
(2) Lifting range D
Hoisting and lifting height range is decreased depth, ie, the highest and lowest spreader vertical distance between the working position.
Third, the span S
Span bridge type lift hoist means run horizontal distance between the centerline of the track, in units of m.
Bridge-type crane hoist trolley orbit as the distance between the center line of the car gauge.
Ground rail running jib crane hoist orbit as the distance between the center lines of the lift hoist gauge.
Fourth, the magnitude of L
Rotating jib lift hoist means the rotation center line of the amplitude extract unit and the horizontal distance between the vertical line, in units of m. Non-rotating type electric hoist jib crane spreader magnitude refers to the centerline axis of the boom between the rear axle or other typical water level distance.
When the minimum or trolley jib angle position and rotation center distance lifting hoist maximum amplitude of the most significant; vice versa for the minimum amplitude.
Five working speed V
Operating speed is the working body lifting hoist stable operation at rated load speed.
1. Lifting speed Vq
Lifting speed refers to the lifting hoist in steady-state operation, the rated load of the vertical displacement of the speed in m / min.
2. Carts running speed Vk
Carts running speed is the horizontal lifting hoist on road or track running speed with rated load, in units of m / min.
3. Car speed Vt
Car speed refers to the steady state of motion, the car on a level track running speed with rated load, in units of m / min.
4. Change speed V1
Change speed is the steady state of motion, the luffing plane flown minimum rated load, from the most significant to the smallest horizontal displacement amplitude average linear velocity in m / min.
5. Walking speed V.
Walking speed refers to the road condition, mobile lifting hoist rated load hanging the smooth running speed in km / ho
6. Rotation speed ω
Steady rotational speed is the state of motion, lifting hoist rotation around its center of rotation speed in r / min.
From the weight lifting heavy objects refers to the mass, in kg or t. Can be divided into nominal weight, maximum weight, total weight, effective from the weight and so on.
1. Nominal weight Gn
Rated weight lift hoist can lift spreader or materials with separable attachment (such as grab, electromagnetic chuck, balance beam and other quality combined.
2. Total weight Gz
Total weight of lift hoist can lift spreader and materials can be divided into long-term fixed together in lift hoist on the spreader and drama (including the hook, pulley blocks, lifting wire rope and hoist and trolley in the following other lifting objects) of the total mass.
3. Effective from the weight of Gp
Effective from the weight lift hoist can lift the net mass of the material.
This parameter is required as follows:
First, on the plate lift hoist lifting weight calibration, usually refers to the lift hoist the rated capacity should be eye-catching structure represents a significant lift hoist position.
Second, the type of lifting hoist boom, its nominal weight is varies with the magnitude of its crane lifting torque characteristic index is used to characterize. Signage on the calibration value is the maximum lifting capacity.
Third, with separable spreader (such as grab, electromagnetic chuck, balance beams, etc.) of the lift hoist lifting and material quality of their total rated capacity serving to allow lifting the quality of materials is a valid starting weight.
Two, lifting height H
Lifting height is lift hoist orbit top (or ground) to extract the location of the device limit the vertical distance, in units of m. Usually hook, the hook and loop count to hook center; grapple and other containers, count to bottom of the container.
1. Decreased depth h
When the extract device can be placed below the top surface ground or in orbit, its distance is called devolution down depth. Ie spreader minimum working position and lift hoist horizontal vertical distance between the supporting surface.
(2) Lifting range D
Hoisting and lifting height range is decreased depth, ie, the highest and lowest spreader vertical distance between the working position.
Third, the span S
Span bridge type lift hoist means run horizontal distance between the centerline of the track, in units of m.
Bridge-type crane hoist trolley orbit as the distance between the center line of the car gauge.
Ground rail running jib crane hoist orbit as the distance between the center lines of the lift hoist gauge.
Fourth, the magnitude of L
Rotating jib lift hoist means the rotation center line of the amplitude extract unit and the horizontal distance between the vertical line, in units of m. Non-rotating type electric hoist jib crane spreader magnitude refers to the centerline axis of the boom between the rear axle or other typical water level distance.
When the minimum or trolley jib angle position and rotation center distance lifting hoist maximum amplitude of the most significant; vice versa for the minimum amplitude.
Five working speed V
Operating speed is the working body lifting hoist stable operation at rated load speed.
1. Lifting speed Vq
Lifting speed refers to the lifting hoist in steady-state operation, the rated load of the vertical displacement of the speed in m / min.
2. Carts running speed Vk
Carts running speed is the horizontal lifting hoist on road or track running speed with rated load, in units of m / min.
3. Car speed Vt
Car speed refers to the steady state of motion, the car on a level track running speed with rated load, in units of m / min.
4. Change speed V1
Change speed is the steady state of motion, the luffing plane flown minimum rated load, from the most significant to the smallest horizontal displacement amplitude average linear velocity in m / min.
5. Walking speed V.
Walking speed refers to the road condition, mobile lifting hoist rated load hanging the smooth running speed in km / ho
6. Rotation speed ω
Steady rotational speed is the state of motion, lifting hoist rotation around its center of rotation speed in r / min.
Electric chain hoist brake failure how do
Door machine commonly used hydraulic plunger stopper. Directly related to the reliability of the brake and set personal safety, so its reliability requirements are particularly high. However, there is a hydraulic putt put into use more brake failure, fault phenomenon are:
(1) Rope hoist motor shaft and the impeller shaft loose coupling between the square after the fall, the hydraulic cylinder idling motor shaft does not move.
(2) The hydraulic brake loose putter putter bending deformation, loose brake is not working place.
(3) Hydraulic brake rod spring break, the brake can not be closed.
(4) The brake frameworks, card live hinge, opening and closing of the brake, slow, or does not operate.
(5) rope hoist brake framework activities hinge point bolt loose, brake work is not in place;
(6) brake band, brake wheel badly worn, or loss of braking torque decreases the braking torque.
(7) Hydraulic brake push rod loose the drive motor phase failure, motor and brake release unit does not operate.
The Wire rope hoist failure led directly to door lifting mechanism, reduce the reliability of luffing mechanism, especially down the process and increase process Zhidongshiling, seriously endangers the safety, so to improve hoisting mechanism, luffing mechanism brakes Reliability has always been our Hoist equipment device management and technology research focus.
(1) Rope hoist motor shaft and the impeller shaft loose coupling between the square after the fall, the hydraulic cylinder idling motor shaft does not move.
(2) The hydraulic brake loose putter putter bending deformation, loose brake is not working place.
(3) Hydraulic brake rod spring break, the brake can not be closed.
(4) The brake frameworks, card live hinge, opening and closing of the brake, slow, or does not operate.
(5) rope hoist brake framework activities hinge point bolt loose, brake work is not in place;
(6) brake band, brake wheel badly worn, or loss of braking torque decreases the braking torque.
(7) Hydraulic brake push rod loose the drive motor phase failure, motor and brake release unit does not operate.
The Wire rope hoist failure led directly to door lifting mechanism, reduce the reliability of luffing mechanism, especially down the process and increase process Zhidongshiling, seriously endangers the safety, so to improve hoisting mechanism, luffing mechanism brakes Reliability has always been our Hoist equipment device management and technology research focus.
Electric hoist tower demolition should pay attention to what
1 Select the installation site
Appropriately selected type Wire rope hoist tower under the premise of the installation site selection should be good at following matters: ① first installation to complete the overall project construction, to avoid secondary displacement; ② avoid the construction plane appeared dead; ③ fixed attachment site selection and easy installation; ④ completion of construction hoist tower demolition and convenient transportation; ⑤ construction space to avoid its sub-structures, such as high-voltage grid; ⑥ need help with the installation according to the construction equipment and other Rope hoist lifting construction components.
2 Personnel Organization
Tower hoist assembly and disassembly is both important and dangerous and stressful jobs engineering perspective, we must attach great importance to the ideological arguments, from the organization is fully guaranteed. In addition to construction management and with the necessary professional and technical personnel, all construction workers should be subject to professional education, with the appropriate type of work safety knowledge and operating skills, certificates. Construction tower hoist assembly and disassembly by professional construction teams.
3 The management system has been developed
Tower hoist installation and removal is a systematic strong management construction project, my unit based on years of experience and lessons learned to develop a set of relatively complete system speed management measures, from the organization, system is fully guaranteed. For managing all aspects of construction for a more detailed provisions, such as wire rope hoist tower foundation acceptance and technical files, installation and removal mission statement, installation and removal security technology correspondent, track inspection records, construction records assembly and disassembly, assembly and disassembly is complete inspection records, Parts inventory records, the use of safety technical tests, etc., that are proven effective.
Appropriately selected type Wire rope hoist tower under the premise of the installation site selection should be good at following matters: ① first installation to complete the overall project construction, to avoid secondary displacement; ② avoid the construction plane appeared dead; ③ fixed attachment site selection and easy installation; ④ completion of construction hoist tower demolition and convenient transportation; ⑤ construction space to avoid its sub-structures, such as high-voltage grid; ⑥ need help with the installation according to the construction equipment and other Rope hoist lifting construction components.
2 Personnel Organization
Tower hoist assembly and disassembly is both important and dangerous and stressful jobs engineering perspective, we must attach great importance to the ideological arguments, from the organization is fully guaranteed. In addition to construction management and with the necessary professional and technical personnel, all construction workers should be subject to professional education, with the appropriate type of work safety knowledge and operating skills, certificates. Construction tower hoist assembly and disassembly by professional construction teams.
3 The management system has been developed
Tower hoist installation and removal is a systematic strong management construction project, my unit based on years of experience and lessons learned to develop a set of relatively complete system speed management measures, from the organization, system is fully guaranteed. For managing all aspects of construction for a more detailed provisions, such as wire rope hoist tower foundation acceptance and technical files, installation and removal mission statement, installation and removal security technology correspondent, track inspection records, construction records assembly and disassembly, assembly and disassembly is complete inspection records, Parts inventory records, the use of safety technical tests, etc., that are proven effective.
2013年7月22日星期一
Proof chain hoists Details
Proof
manual hoist are widely used in construction, roads, bridges, metallurgical, mining, slope tunnels, wells and other infrastructure construction management protection in the field of various flammable and explosive, and lifting equipment for lifting goods, especially in the absence of power supply or the case of small venues jobs, but also demonstrate its superiority. Proof
chain block products to reasonable design, advanced manufacturing technology, excellent performance, and become the domestic and foreign markets high-proof hoist product of choice. Proof chain hoists have five characteristics: 1, safe, reliable, durable, excellent strength machine; 2, good performance, easy
maintenance; 3, small size, light weight, easy to carry; 4, hand zipper feel good, hand-pull small high transmission efficiency; 5, advanced structure, beautiful appearance, greatly reducing the operator's labor intensity, etc.; explosion-proof chain hoists with lifting components supporting the use of single-track road hoist and trolley for overhead monorail transport, or for manual single girder cranes and jib crane to lift cargo and lifting equipment. Explosion-proof chain hoists its performance in full compliance with national GB/10686-1989 standards. Proof chain lifting equipment price is not the most important, the most important is the product quality, only quality standards, safety was the most secure. Proof Chain Block over 10 tons to be customized.
maintenance; 3, small size, light weight, easy to carry; 4, hand zipper feel good, hand-pull small high transmission efficiency; 5, advanced structure, beautiful appearance, greatly reducing the operator's labor intensity, etc.; explosion-proof chain hoists with lifting components supporting the use of single-track road hoist and trolley for overhead monorail transport, or for manual single girder cranes and jib crane to lift cargo and lifting equipment. Explosion-proof chain hoists its performance in full compliance with national GB/10686-1989 standards. Proof chain lifting equipment price is not the most important, the most important is the product quality, only quality standards, safety was the most secure. Proof Chain Block over 10 tons to be customized.
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