Some standard content:
ICS 53.080
Machinery Industry Standard of the People's Republic of China
JB9229.1-9229.3--1999
Scissors elevating platforms
Published on 1999-06-28wwW.bzxz.Net
National Bureau of Machinery Industry
Implementation on 2000-01-01
J8/r9229.2-1999
This standard is a revision of 2BJ8300318? Technical System of Lifting Platforms. During the revision: the original standard was modified, and the main part was not changed. This standard replaced 2B[83H03.1--87 from the date of implementation. The appendix of this standard is the attached requirements.
This standard is issued by Beijing Hoisting and Conveying Machinery Research Institute and is the subject of the draft standard. The main authors of this standard are: Liu Na, Wan Yong, Zhang Jingxiang, 3
·Scope
Machinery Industry Standard of the People's Republic of China
Scissars elevating plaiforms-SpeclficationsJB/T929.2—1999
Generation Z date [83 03. .- -8?
This standard applies to various lifting platforms with lifting part structures of different types, namely fixed lifting platforms, mobile lifting platforms, and traveling industrial lifting platforms (DC motor limited: AC motor driven, internal whole machine driven) lifting vehicles (hereinafter referred to as lifting platforms). The working environment temperature is 5-t
2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through the agreement in this standard. At the time of publication of this standard, the versions shown are valid: All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards GT1497—[983
GB/T 3321.--1987
GD.T 3766—1983
GB.T 7935-.1987
GB:T 13306—[991
JB.T 9229.1—1999
JB:19224.3—[999
3 Technical requirements
Pressure-maintaining appliances.H This standard
Steel fusion welded butt joint radiography and quality classification hot press system pressure technology system
Pressure loss components pressure technology system
Shear and type lifting table type and basic parameters
Shear and type lifting table acid method
3.1 Lifting is divided into [B/T9229.1, 3B/1922 9.3 and the requirements of this standard, and in accordance with the final completion procedure, non-standard drawings and documents,
3.2 General requirements
3.2.1T. The rising speed of the workpiece shall be 6-9m/min, and the descending speed shall not be greater than 6m/min. 3.2.2 For the connection of the various forks of the load-bearing components, the connection of the single-bracket support and the position, the connection of the bottom frame and the single-bracket support, the connection of the lower raft wheel track and the bottom beam, the upper work platform and its upper support, the connection of the upper roller track and other parts, It shall comply with the requirements of GB3323 Level 1. The exterior of the baking seam shall meet the following requirements: a) Burn-through is not allowed. In the longitudinal direction, the longitudinal direction and the parent body pressure, no cracks are allowed. The continuous welding chain cannot be interrupted. The welded chain should be uniform. The maximum height difference should be less than 2mm: b) The bite length should not exceed 10% of the continuous length, and the depth should not exceed 0.4mm: c) There is no welding slag, welding nodules, etc. at the key. 3.2.3 The oil roller should be smooth, have a good fit with the metal, have a uniform color, no bubbles, no cracks, and no wrinkles. , pitting, leakage rate and sagging, there are safety signs on the bottom frame, approved by the State Machinery Industry Bureau on June 28, 1999, 2000-01-1,
3.3 Total coefficient of the structure
JR/T9229.2-1999
3.3.1 In determining the safety factor, no force must be applied when the platform is placed on the horizontal plane 1. The three platforms are all listed as bearing the maximum load. According to the general instructions, the maximum centrifugal force produced by the components in the three parts is used: the safety factor is calculated according to the formula (): [, +a,
In the specification: the yield limit of the integral material, the strength limit of the brittle material, Nm:, the stress caused by the deadweight of the structure, N and:
When bearing the maximum load, the potential stress in the structure is, N! .·…Stress coefficient,
is the dynamic load coefficient. The values of
and can be obtained on the prototype through test analysis. If the test results are not used, the values of and shall not be less than 1.10 and 1.25 respectively.
3.3.2 The safety factor obtained by formula (1) for the load-bearing components of the lifting platform (excluding brittle materials) shall not be less than 2.3.3.3 The safety factor obtained by formula (1) for the load-bearing components of the lifting platform made of brittle materials (such as body fast, etc.) shall not be less than 5,|| tt||3.3.4 Whenever the platform is set to the maximum load, and the lowering power is transmitted through a system of cables or bars, or both, the safety factor of the cables or bars shall not be less than 8
3.4 Load bearing capacity
3.4.1 The lifting platform is placed on a horizontal support surface: the workbench is subjected to 125% of the maximum load, and after 10 lifts, the load shall not be deformed or cracked.
3.4.2 The lifting platform is placed on a horizontal support surface, and the maximum load is placed at a distance from the workbench. Any position within the inner perimeter of 3001mm, after lifting 100 degrees, the load-bearing components shall not be accompanied by permanent deformation or cracking: 3.5 Reliability and durability
3.5.1 The reliability and durability of the non-lowering parts shall be tested according to the method specified in JB/T9729.3. During the test, no oil pipe rupture, mechanical component rupture, etc. shall occur. After the test, check each load-bearing component. There shall be no permanent deformation or cracking. The main easily exposed parts such as pins shall not have obvious signs of damage. The sinking amount of the workbench shall still meet the requirements of 3.R. month. 3. 5.1 The lifting part of the self-propelled vehicle shall meet the requirements of 3.5.1. After the running part has traveled continuously for 200km without load, the running structures shall not be obviously worn. The connections between the lower platform, lifting structure, chassis, support valve, etc. shall not be loose and shall not be permanently cracked.
3.5.3 In addition to meeting the relevant requirements of 5.1, the low-profile that has been identified shall meet the requirements of 3.5.2 after it has traveled continuously for 1000km without load and the special bottom plate that has been identified shall meet the requirements of 3.5.2 after it has traveled continuously for 30km without load. 6.6 Determination of the maximum lateral force allowed to act horizontally on the working platform: F=kG
In the formula: G—load time, N
(2)
=0.66-0.10 (maximum load, maximum lifting height, maximum value): Otherwise, take the smaller value, but the lower value shall not be less than 250
JE/T92292—1999
3.6.2 The lifting platform is placed on a slope with a slope of 2.5% in any direction, and the support is withdrawn to keep the chassis level, and the worker who is affected by the wind is 3.6.2. Stability of the workbench when subjected to the maximum shear force F. The workbench shall bear 125% of the maximum load and shall be stable at the maximum lifting height. 3.6.7.2 If the lower workbench of the lifting platform can be extended, the workbench must be extended to the limit position, and 15% of the maximum load evenly distributed on the extended part. The maximum load it bears shall be stable at the maximum lifting height. 3.6.3 The longitudinal direction of the lifting platform is placed on a slope F with a slope of 10%, and the base is extended by 1/2 of the chassis. When the lifting platform is subjected to a force 6 wind or the maximum upward force F, the workbench shall bear 125% of the maximum load and shall be stable at the maximum lifting height. 3.4. The blade platform on the slope must be subjected to the slope stability test. 3.6.5 Stability under load
The lifting platform is placed on a flat surface, with the outriggers extended and the bottom kept horizontal. The maximum concentrated load is placed at any position 300mm away from the inner periphery of the workbench. The bottom is stable at the measured lifting height. 3.6.6 The lifting platform is placed on a slope with a slope of 2.5%, with the outriggers extended and the chassis kept horizontal, and the workbench is raised to the maximum lifting height. The approximate resistance K measured is:
Where: M——total resistance factor:
M. Total tilting force constant
3.6.7 Operation stability
Mobile, self-propelled lifting platforms and lifting vehicles should be stable when driving in a straight line and turning along the longitudinal and transverse directions of the designed road. 3.7 Working platform
3.7.1. There should be protective railings or other anti-expansion structures around the work surface, with a height of 900mm. The railings can withstand a static load of 900N without damage, and the work surface should be non-slip. 3.7.2 There should be a minimum 50mm baffle plate around the work surface. 3.3.3 The doors at the entrance and exit of the work platform shall not open outwards. Such doors can be replaced by railings, chains or other effective facilities, and there shall be a maximum load plate. 3.7.4 There shall be ladders for the upper and lower work platforms, and the treads of the ladders shall be non-slip. 3.7.5 The work platform where electrical work is carried out on the platform shall be insulated from the supporting ground. 3.6. For lifting platforms that are not used for manned work, railings, baffles and doors may be provided. 3.8 Lifting equipment
3.8.1 Filter pressure system and components
3.8.1.1 The hydraulic system shall comply with the relevant requirements of GB/T3766. The hydraulic components used in the filter pressure system shall comply with the provisions of GB/T7935.
3.8.1.2 The minimum bursting pressure of the pipeline in the hydraulic system shall be 5 times the system pressure. There shall be no leakage in the components, pipelines and joints.
3.2 When the lifting power is transmitted by a rope, a bar or both, or by a mechanical transmission such as a rod and a nut, its hydraulic system shall comply with the relevant requirements in 2.3.
3.8.3 Electrical system components
JB/T9229.2—1999
3.8, 3.1 Electrical components, wires and other insulation should comply with the relevant provisions of (BT1497. The DC voltage of the control circuit shall not be 0V
3.3.2 Electrical equipment should be installed in a closed manner, and rainwater should not enter. All electrical components should not come into contact with drainage, and ensure that they will not be accidentally touched during normal operation.
3.8.3.3 The non-conducting wires are grounded, and the wires are grounded. 3.8.4 Protection devices
3.8.4.1 When the power, oil circuit, etc. fail, there must be a safety device that can prevent the workbench from uncontrolled descent (uncontrolled descent is allowed). 3.8.4.2 If the workbench can extend halfway and exceed the bottom frame of the lifting platform, there must be a device to prevent the workbench from descending when the oil circuit, etc. fail. 33.4.3 When the hydraulic diaphragm is lifted, there must be a device to prevent the soil from shrinking. When the workbench is subjected to the maximum load and the load is 15 minutes, the return plate should not exceed 3mm
3.8.4.4 The maximum lifting height error shall not exceed 0.2% of the maximum lifting height. 3.8.5 Lifting mechanism
3, 5.【: The lifting mechanism shall ensure that the workbench is lifted and lowered stably, and no jumping lifting phenomenon shall occur. 3.3.5.2 The moving parts of the lifting mechanism shall fall smoothly during operation, and there shall be no jamming or noise. 3.8.6 Emergency descent device
When the power-driven lifting platform loses power, there shall be a device that enables it to descend automatically. 3.8.7 Deflection
3. 87. The deflection of the lifting platform during the lifting process shall not be greater than 0.5% of the maximum lifting height (3). 2.2. The deflection of the lifting platform when the lifting force is large shall not be greater than the value of (4): (4)
Where: H = maximum lifting height, mm
0.01-0.021 H value (maximum value)
3.8.8 When the working platform is subjected to the maximum load and stays at a height within the light control range of the lifting platform, the sinking amount of the working platform within 20 mm should not be more than 0 mm
3.8.9 Safety precautions
89. The minimum distance between the fork arm and the working platform and the periphery of the base frame is 50mm, and the minimum distance between adjacent forks is 30m (see figure) 5
『B/T9229.2—1999
3.8.9.2 The fixed lifting platform should be installed on a semi-solid foundation. For a fixed lifting platform installed on the ground, when the required distance between the lower surface of the workbench and the upper surface of the chassis is less than 100, a safety bottle catcher (Figure 2) or a safety fence is installed around the lower surface of the sliding workbench.
Special holding piece
3. Control and reduction device
3.9.1 Bottom volume
3.9.1.! The white lifting platform should be equipped with a running brake and a parking brake. The braking system: 3.9.1.2 The braking performance of the braking system must ensure that the transmission mechanism of the lifting platform is in the neutral position, the engine is idling, and when driving on a non-loose dry road with the maximum slope, both forward and reverse can be lifted. Braking: 3.9 .1.3 The brake of the parking brake system must remain in the braking state if there is no power input after the last braking action. 3.9.1.4 The steering system should be flexible to operate:
3.9.2 Control mechanism
3.9.2.1 The lifting and lowering control of the landing platform can be electrically controlled or manually controlled. 3.9Z1 The control mechanism should be installed in a place where the operator can clearly see the overall picture of the work process. The control mechanism can be changed on the work platform chassis at the same time, and an interlocking mechanism must be installed so that only one platform can be operated at the same time. 3.9.2.3 The direction of movement of the lifting platform should be indicated by arrows on the control components. Direction, clearly indicate "raise" and "lower". If it is controlled by a handle, it can be operated in a vertical plane. Move upward to raise the workbench and move downward to lower the workbench. It can automatically return to the "lower" position after releasing the handle. The chain parts are marked with different colors. 3. In the self-propelled non-gas platform driven by fuel and non-gas engines, its fuel pipeline should be supported to reduce vibration and friction. It should not be installed near the heat source of the engine. The fuel pipe should be a hard pipe. The exhaust pipe should be equipped with a muffler to prevent excessive noise. 4 Inspection rules
4. Type test
4. 1.1 New products, products that have been discontinued for more than 10 years, and products that have been re-produced after major changes in structural materials and processes shall all be subject to type tests and comprehensive quality inspections. 4.1.2 Items of type tests 3) Load capacity: h) Durability: d) Stability; e) Hydraulic outriggers; e) Lifting height: e) Lifting mechanism: e) Emergency lowering device: h) Sinking device; j) Chassis control device: k) Hydraulic support leg system. 4. 2 Factory test
JB/T9229.2--1999
4.2.1 The product must be manufactured in accordance with the quality control regulations! "The product can only be shipped after inspection by the inspection department. The product certificate should be attached when it leaves the factory. 4.2.2 Inspection items: h) Parameters of the structure, maximum lifting height and limit device; h) Carrying capacity: e) Lifting and lowering speed: d) Maximum side space; e) Working, doors, railings, etc.: h) Turning mechanism and walking machine: h) Pressure, electrical control system and auxiliary devices; the door internal combustion engine driven white travel opening and lowering platform needs to be inspected for noise; assembly quality, surface and oil quality.
5 Marking, packaging, transportation and storage
5.1 Marking
The product label must be clearly fixed on the lifting platform. The lettering and material of the label should be able to ensure that it remains clear within the service life. The label should comply with the provisions of GB13306. The product label should indicate:
2) Manufacturer's name or factory logo;
b) Product name and model;
c) Maximum load capacity, t:
d) Maximum lifting height:
e) Ascending and descending speed, m/min;
T Battery voltage or rated voltage of AC circuit, V: Rated operating pressure of hydraulic system, P:
h) Motor (internal combustion engine power, kW:
i Outline dimensions, length × width × height, mm;|| tt||i Self-weight, t
Date and product number
5.2 Packaging
JB/[9229.2-199y
5.2.1 The packaging must be equipped with anti-tampering facilities, and its structure must have sufficient mechanical protection to ensure that it will not be exposed during the entire transportation process. 5.2.2 The packaging marks on the packaging box are clear and neat, and will not be completely erased due to water washing or long-term use. The marks should include the following items:
a) Receiving unit and address:
b) Gross weight, t:
) Product name, model, size (length × width × width), md) Product location and center position mark
) Shipping unit and address;
Door safety mark,
5.2.3. The technical documents of the product include: a) Packing list: b) Product factory certificate of conformity; e) Product use and maintenance manual; s. 3. Transportation 5.3. When transporting the 1-liter external lift to the factory, the workbench should be lowered to the lowest position and fixed. Mobile and self-propelled vehicles can be transported by transportation equipment. 5.3.2 When the lift is operated in the work area, the workbench should be folded to the lowest position and then straightened. The travel speed is generally less than 6kmh. 5.4.1 The lift should be placed in an environment without rain, sun and kitchen gas pollution. 5.4.2 When the lift is released: 1. The workbench should be folded to the lowest position and placed on a solid ground. The front, back, left and right sides of the lift should be kept roughly horizontal. If the walking wheel is an inflatable wheel, the wheel should be off the ground. 12
A General
JB9229.2-199
Appendix A
(Suggested Appendix)
Terms of Scissor Lifts
A [Fixed Scissor Lifts [Referred to as Fixed Lifts] Scissor lifts with fixed positions,
AI.2 Mobile Scissor Lifts [Referred to as Mobile Lifts] Scissor lifts that do not have their own travel drive, but can be moved in the work area with the help of external force. A1.3 Mobile Scissor Lifts (Referred to as Mobile Lifts) are scissor lifts that use AC or DC or internal combustion engines as power and can travel between work areas or sites. $2Structure
AZ,1 Construction (Figure A1)
Lifting platform that can accommodate people and place items. 1
A2.1.1 Workbench length (digital)
The side length of the workbench along the moving half. 42.1.2 Workbench width (lateral, vertical, and horizontal) The length of the workbench where the arm moves horizontally. A2.1.3 Telescopic workbench A workbench that can be horizontally extended relative to the bottom beam. A2.1.4 Reversible workbench A workbench that can rotate in the horizontal plane with a lifting device. A2.1.5 Anti-shovel railings A railing used on the workbench to prevent people or objects from falling. A2.1.6 Doors A movable device at the entrance of the workbench. A2. [. 7 Baffles JB/T9329.3-1999 A fence at least 50mm above the workbench surface is installed around the workbench to prevent objects from falling along the table surface. A2. E. 9 Upper track
Installed on the bottom surface of the workbench, the track for the upper guide wheel to run. A2.1.9 Upper support
Installed on one end of the bottom surface of the workbench, the support plate with the arm frame connected to it by a pin, A2.2 Frame (Figure A2)
The general term for the scissor-type mechanism of the lifting part of the scissor-type lifting platform. 43.2.2
A2. 2. 1 Ai hip
The rods that make up the front fork mechanism.
A2.2.2 Inner arm frame
The general term for the fork frame with the frame part installed on the inside. A2.2.3 Outer arm frame
The general term for the fork frame with the frame part installed on the outside. A2.2.4 Upper guide wheel
Installed on one end of the fork frame, the guide wheel for the upper track to run, A2, 2. 5 The lower guide wheel is installed at one end of the receiving arm and is a guide wheel running along the lower track. A2. 2. 6 The guide wheel is installed at both ends of the fork screen and is used to connect the inner arm frame with the inner arm frame and the outer arm frame with the outer arm frame. A2.2. 6.1 The inner guide wheel is hinged between the two side plates. A2.2. 6.2 The outer guide wheel is connected to the middle guide wheel. A2. 2. 7 The middle pin connects each part of the inner and outer kidney frames. 42. 2. 8 The side pin connects the inner and outer parts. 42. 2. 9 Lifting beam
The oil street that makes the lifting platform rise and fall.
A2.2.10 Ground depth
IHT9229.2—1999
Parts that support the lifting beam on the inner beam or outer beam frame A2.2.10.1 Upper beam
Supports the horizontal support of the upper end of the lifting beam.
A2.2.10.2 Lower beam
Supports the lower beam A2.2.11 Cylinder seat
The part that connects the lifting cylinder to the dryer.
A2,2.12 Section (section
A group of (two in one) outer booms and inner booms connected by an intermediate pin are called a section A2.3 Chassis (Figure A3)
The part that connects the boom, walking and steering mechanisms, 2.3.2
or 2.3, Outrigger
A24SLA2316714
The stability of the whole platform, and the installation of the lifting platform to the horizontal state. A7.3.1.1 Water half-retractable oil blood
Water half-retractable injection,9 Lifting beam
The oil pipe that makes the lifting platform rise and fall.
A2.2.10 Ground depth
IHT9229.2—1999
Parts that are fixed on the inner beam or outer frame and support the lifting oil beam A2.2.10.1 Upper crossbeam
The horizontal beam that supports the upper end of the lifting beam.
A2.2.10.2 Lower crossbeam
The beam that supports the lower end of the stopper
A2.2.11 Cylinder seat
Parts that connect the lifting cylinder and the oil pump.
A2,2.12 Section (Section
High) A group of outer booms (two in one) and inner booms connected by an intermediate pin are called a section A2.3 Chassis (Figure A3)
Parts connecting the boom, walking and steering mechanisms, 2.3.2
or 2.3, Outrigger
A24SLA2316714
Stability of the whole platform, and the installation of the lifting platform to the horizontal state. A7.3.1.1 Water half-retractable oil blood
Transmit water half-retractable injection,9 Lifting beam
The oil pipe that makes the lifting platform rise and fall.
A2.2.10 Ground depth
IHT9229.2—1999
Parts that are fixed on the inner beam or outer frame and support the lifting oil beam A2.2.10.1 Upper crossbeam
The horizontal beam that supports the upper end of the lifting beam.
A2.2.10.2 Lower crossbeam
The beam that supports the lower end of the stopper
A2.2.11 Cylinder seat
Parts that connect the lifting cylinder and the oil pump.
A2,2.12 Section (Section
High) A group of outer booms (two in one) and inner booms connected by an intermediate pin are called a section A2.3 Chassis (Figure A3)
Parts connecting the boom, walking and steering mechanisms, 2.3.2
or 2.3, Outrigger
A24SLA2316714
Stability of the whole platform, and the installation of the lifting platform to the horizontal state. A7.3.1.1 Water half-retractable oil blood
Transmit water half-retractable injection,
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.