Some standard content:
JB/T10222—2001
This standard shall be implemented from October 1, 2001. Foreword
This standard is proposed and managed by the National Technical Committee for Standardization of Lifting Machinery. The responsible drafting unit of this standard is Tianjin Lifting Equipment Co., Ltd. The participating drafting units of this standard are Beijing Lifting and Transportation Machinery Research Institute, Heilongjiang Fujin Crane General Factory, and Jiangsu Anda Explosion-proof Electromechanical Group Co., Ltd.
The main drafters of this standard are Wang Shuming, Huang Fengkuan, Hui Xiaoliang, Wei Yongshun, Zhao Weiming, Tao Tianhua, Fu Weigong, etc. This standard is published for the first time.
1 Scope
Machinery Industry Standard of the People's Republic of China
Explosion-proof Electric Wire Rope Hoists
Specification for explosion-proof electric wire rope hoistsJB/T 10222--2001
This standard specifies the classification, technical requirements, test, inspection rules and marking, packaging, transportation, storage and other contents of explosion-proof electric wire rope hoists (hereinafter referred to as explosion-proof hoists).
This standard is applicable to explosion-proof hoists working in explosive gas environments in coal mines (Class [) and factories (Class II). This standard does not apply to explosion-proof hoists working in explosive dust environments. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard by being referenced in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB755-2000 Rated performance of rotating electrical machines
GB/T2900.35--1998 Electrical terminology Electrical apparatus for explosive atmospheres GB3836.1--2000 Explosion-proof electrical apparatus for explosive atmospheres Part 1: General requirements GB3836.2-2000 Electrical apparatus for explosive gas atmospheres Part 2: Flameproof type\d" GB3836.3-2000 Electrical apparatus for explosive gas atmospheres Part 3: Increased safety type\e" JB/T 9008.2—1999
Technical conditions for wire rope electric hoists
JB/T9008.3--1999 Conical rotor motor for wire rope electric hoists JB/T 9008.41999
Test method for electric wire rope hoist
Technical conditions for acceptance of electrical control equipment for electric wire rope hoist JB/T 9008. 6—19994
3 Definitions
This standard adopts the following definitions in GB/T2900.35. 3.1 Explosive atmosphere An environment containing an explosive mixture.
3.2 Explosive mixture An environment in which, under atmospheric conditions, a mixture of flammable substances in the form of gas, vapor, mist, dust or fibers is mixed with air and ignited, and combustion will spread throughout the range.
3.3 Explosive gas environment An environment in which, under atmospheric conditions, a mixture of flammable substances in the form of gas, vapor, mist, dust or fibers is mixed with air and ignited, and combustion will spread throughout the range. 3.4 Explosive gas mixture An environment in which, under atmospheric conditions, a mixture of flammable substances in the form of gas, vapor, mist, dust or fibers is mixed with air and ignited, and combustion will spread throughout the range.
3.5 Explosive dust atmosphere. Explosive dust atmosphere. Environment containing explosive dust mixture
Approved by China Machinery Industry Federation on April 3, 2001 260
Implementation on October 1, 2001
JB/T10222---2001
3.6 Maximum surface temperature maximum surface temperature when electrical equipment is operating under the most unfavorable conditions within the permissible range, any part of any surface exposed to the explosive mixture, which may not cause the explosion of the explosive mixture around the electrical equipment. 3.7 Temperature class temperature class The group divided according to the maximum surface temperature of electrical equipment. 3.8 Minimum igniting current minimum igniting current (MIC) The minimum current that can ignite the most easily ignitable mixture under specified test conditions. 3.91
Maximum experimental safe gap (MESG) is the maximum gap between the two parts of the shell cavity under the test conditions specified in the standard, when all concentrations of the test gas or steam and air mixture inside the shell are ignited, the explosive gas mixture outside the shell cannot be ignited through the joint surface. 3.10 Explosion hazardous area hazardous area A place where the amount of explosive mixture that appears or is expected to appear is sufficient to require preventive measures to be taken for the structure, installation and use of electrical equipment.
Zone zone
All or part of an explosion hazardous place.
Note: According to the frequency and duration of the occurrence of explosive mixtures, it can be divided into several zones with different degrees of danger. Flameproof electrical apparatus\d”flaneproof electrical apparatus“d”3.12
Electrical equipment with flameproof enclosure.
3.13 Flameproof jointflameproof jointThe joint surface where the relative surfaces of the various parts of the flameproof enclosure fit together to prevent the internal explosion from spreading to the explosive gas mixture around the enclosure.
3.14 Increased safety electrical apparatus“e”increased safety electrical apparatus“e”Under normal operating conditions, no arc, spark or high temperature that may ignite the explosive mixture is generated. Measures are taken in the equipment structure to improve the safety level to avoid these phenomena under normal and recognized overload conditions.4 Classification
4.1 Categories, levels and temperature groups of electrical equipment4.1.1 The use environment of explosion-proof hoists is divided into Class 1 (for use in coal mines) and Class I (for use in factories). Class 1 explosion-proof hoists are divided into Class A and Class I according to the maximum test safety gap or minimum ignition current ratio of the electrical equipment for explosive gas mixtures. B, C, and divided into six groups from T1 to T6 according to their maximum surface temperature (see Table 1). The category and level of explosion-proof hoists are selected according to the classification of hazardous substances, represented by I, IA, IB, and IC. 4.1.2 The maximum allowable surface temperature of the explosion-proof electrical equipment and mechanical equipment with heat sources used shall comply with the provisions of Table 1. Table 1
Temperature group
Maximum allowable surface temperature
4.2 Explosion-proof hoist marking
4.2.1 Model representation method
4.2.2 Marking example
JB/T 10222--2001
Explosion-proof mark
Lifting height, m
Rated lifting capacity, t
Explosion-proof hoist code
a) Rated lifting capacity of 3.2t, lifting height of 4m, explosion-proof mark dI explosion-proof hoist is marked as: HB 3.2-4d I JB/T 10222--2001b) Rated lifting capacity of 6.3t, lifting height of 8m, explosion-proof mark d1BT4 explosion-proof hoist is marked as: HB 6.3-8dIBT4JB/T 10222--2001c) Rated lifting capacity of 10t, lifting height of 10m, explosion-proof mark de1CT4 explosion-proof hoist is marked as HB10-10 deICT4 JB/T 10222--20014.3 Basic parameters
4.3.1 The rated lifting capacity should preferably be the values specified in Table 2. Table 2
The lifting height should preferably be the values specified in Table 3. 4.3.2
3 The lifting line speed should preferably be the values specified in Table 4. 4.3.3
Note: The lifting line speed is the wire rope winding speed. 0.5
The operating speed should preferably be the values specified in Table 5. 4.3.4
Note: The values in the table are normal operating speeds. If it is a dual speed, the normal and slow speed ratio should be 4:1. 4.3.5 The working level of explosion-proof hoists is M3~M5. 262
5 Technical requirements
JB/T 10222-—2001
Except for the following requirements related to explosion-proof, the remaining requirements shall be implemented in accordance with the relevant contents of JB/T9008.2~9008.4 and JB/T9008.6. 5.1 Basic requirements
5.1.1 Explosion-proof hoists shall comply with the provisions of this standard and shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5.1.2 The insulation resistance value of explosion-proof hoists at room temperature shall not be less than 1.5M2. 5.1.3 The grounding connection resistance value of the explosion-proof hoist track shall not be greater than 40. 5.2 Requirements for the working environment of explosion-proof hoists
5.2.1 Explosion-proof hoists generally work indoors, with a working environment temperature of 20 to 40°C, a relative humidity of no more than 90% (at 25°C), and an altitude of no more than 1000m. When the altitude exceeds 1000m and the working environment temperature exceeds 40°C, the provisions of GB755 shall be followed.
5.2.2 The use environment of explosion-proof hoists shall have good ventilation facilities. 5.2.3 The explosion-proof hazardous areas applicable to explosion-proof hoists are Zone 1 or Zone 2. Note: Zone 1~-an environment where explosive gas mixtures may occur during normal operation; Zone 2-an environment where explosive gas mixtures are unlikely to occur during normal operation, or even if they occur, they only exist for a short time. 5.3 Electrical explosion-proof requirements
5.3.1 The electrical equipment selected for explosion-proof hoists shall comply with the relevant requirements of GB3836, and shall also have an explosion-proof inspection certificate issued by a nationally designated explosion-proof inspection unit within the validity period. The explosion-proof mark shall not be lower than the corresponding requirements of the host. 5.3.2 The connection between explosion-proof electrical appliances and power lines for explosion-proof hoists shall use heavy-duty rubber-sheathed steel-core multi-strand cables, and shall have core grounding core wires. The internal grounding core wires shall be reliably connected to the grounding terminal in the junction box. The installation and connection cables of each explosion-proof electrical appliance must meet the explosion-proof requirements. 5.3.3 No joints are allowed in the middle of the cable, and an explosion-proof junction box should be installed when necessary. 5.3.4 All electrical components shall not have exposed parts. 5.4 Mechanical explosion-proof requirements
5.4.1 In order to prevent the danger caused by sparks and dangerous temperatures due to mechanical friction or collision, the exposed parts of the explosion-proof hoist with relative friction movement should take speed limit measures, such as the winding line speed of the wire rope and the drum and the running speed of the hoist trolley on the track shall not exceed 25m/min.
5.4.2 The wire rope should have reliable lubrication measures to reduce the friction between the wire rope and the drum, rope guide and pulley. 5.4.3 There should be no broken wires on the surface of the wire rope.
5.4.4 The joints of the running track of the explosion-proof hoist should be smooth and flat, and the trolley should not have impact during operation. 5.4.5 Carry out maintenance and inspection work to ensure that the explosion-proof hoist trolley starts and brakes smoothly and avoid wheel slippage. 5.4.6 When there are more than two explosion-proof hoists running on the same track, anti-collision buffer devices should be installed on the hoists. The buffer device should be made of non-metallic material, and its surface resistance should not be greater than 10°Q. 5.4.7 When there are many metal obstacles in the working environment of the explosion-proof hoist, in order to avoid collision between the hook and the metal obstacles, warning signs such as "No Collision" should be marked on the outer surface of the hook pulley side plate. 5.4.8 The brake should be installed inside the flameproof enclosure. 6 Test
The test of explosion-proof hoist shall be carried out in accordance with the relevant contents of GB3836.1~3836.3 and JB/T9008.4. 7 Inspection rules
Except for the following requirements, the rest of the inspection shall be carried out in accordance with the relevant contents of JB/T9008.2. 7.1 Factory inspectionwww.bzxz.net
Check whether the explosion-proof electrical equipment selected for the explosion-proof hoist has an "explosion-proof certificate". According to the design drawings of explosion-proof hoists, check the model, grade and temperature group of explosion-proof electrical equipment, and check the correctness of its installation. 7.2 Type inspection 7.2.1 During normal production, at least two explosion-proof hoists of each type must be inspected once a year. 7.2.2 The items of type inspection should include all the contents specified in Chapter 5. 7.2.3 Under no light conditions, observe the lifting and running status of the explosion-proof hoist with normal human vision, and check that no sparks should be generated. 7.2.4 Electrical equipment trial-produced according to the relevant explosion-proof type special standards should be inspected by the national authorized inspection unit according to the corresponding standards, and the inspection procedures should comply with the provisions of Chapter 6 of GB3836.1--2000. 8 Marking, packaging, transportation and storage Except for the following requirements, the rest shall be implemented in accordance with the relevant contents of JB/T9008.2. There should be a conspicuous and permanent embossed "Ex" mark in red on the obvious place of the explosion-proof hoist. 8.1
8.2 The explosion-proof hoist sign should generally include the following: a) Manufacturer's name;
b) Product name;
c) Trademark;
d) Product model;
e) There should be a clear mark "\Ex" on the upper right of the nameplate; f) Explosion-proof mark, such as dIBT4, etc.;
g) Explosion-proof certificate number;
h) Date of manufacture;
i) Factory number;
j) Lifting capacity;
k) Lifting height;
1) Lifting speed;
m) Mechanism working level;
n) Operating speed.
8.3 Signs and warning signs must be made of bronze, brass or stainless steel, and their thickness should not be less than 1mm. 8.4 Each explosion-proof hoist that is packaged and shipped should have the following documents: a) Product instruction manual; b) Product certificate; c) Packing list; d) Purchased explosion-proof electrical equipment should be accompanied by the manufacturer's factory certificate; e) Spare parts catalog (which can be compiled in the instruction manual). 9 Quality assurance period The manufacturer should ensure that the supplied explosion-proof hoist can work normally within 12 months from the date of use, but not more than 18 months from the date of shipment, under the conditions of proper storage, reasonable installation and correct use by the user. 2643. In the absence of light, observe the lifting and running state of the explosion-proof hoist with normal human vision, and check that there should be no sparks. 7.2.4 Electrical equipment trial-produced according to the relevant explosion-proof type special standards should be inspected by the national authorized inspection unit according to the corresponding standards, and the inspection procedures should comply with the provisions of Chapter 6 of GB3836.1--2000. 8. Marking, packaging, transportation and storage
Except for the following requirements, the rest shall be implemented in accordance with the relevant contents of JB/T9008.2. There should be a conspicuous permanent convex mark "Ex" on the obvious place of the explosion-proof hoist, and it should be painted red. 8.1
8.2 The explosion-proof hoist label should generally include the following contents: a) manufacturer’s name; b) product name; c) trademark; d) product model; e) there should be an obvious sign \Ex” on the upper right of the nameplate; f) explosion-proof mark, such as dIBT4, etc.; g) explosion-proof certificate number; h) date of manufacture; i) factory number; j) lifting capacity; k) lifting height; 1) lifting speed; m) working level of the mechanism; n) operating speed. 8.3 Signs and warning signs must be made of bronze, brass or stainless steel, and their thickness should not be less than 1mm. 8.4 Each explosion-proof hoist that is packaged and shipped should have the following documents: a) Product instruction manual; b) Product certificate; c) Packing list; d) Purchased explosion-proof electrical equipment should be accompanied by the manufacturer's factory certificate; e) Spare parts catalog (which can be compiled in the instruction manual). 9 Quality assurance period The manufacturer should ensure that the supplied explosion-proof hoist can work normally within 12 months from the date of use, but not more than 18 months from the date of shipment, under the conditions of proper storage, reasonable installation and correct use by the user. 2643. In the absence of light, observe the lifting and running state of the explosion-proof hoist with normal human vision, and check that there should be no sparks. 7.2.4 Electrical equipment trial-produced according to the relevant explosion-proof type special standards should be inspected by the national authorized inspection unit according to the corresponding standards, and the inspection procedures should comply with the provisions of Chapter 6 of GB3836.1--2000. 8. Marking, packaging, transportation and storage
Except for the following requirements, the rest shall be implemented in accordance with the relevant contents of JB/T9008.2. There should be a conspicuous permanent convex mark "Ex" on the obvious place of the explosion-proof hoist, and it should be painted red. 8.1
8.2 The explosion-proof hoist label should generally include the following contents: a) manufacturer’s name; b) product name; c) trademark; d) product model; e) there should be an obvious sign \Ex” on the upper right of the nameplate; f) explosion-proof mark, such as dIBT4, etc.; g) explosion-proof certificate number; h) date of manufacture; i) factory number; j) lifting capacity; k) lifting height; 1) lifting speed; m) working level of the mechanism; n) operating speed. 8.3 Signs and warning signs must be made of bronze, brass or stainless steel, and their thickness should not be less than 1mm. 8.4 Each explosion-proof hoist that is packaged and shipped should have the following documents: a) Product instruction manual; b) Product certificate; c) Packing list; d) Purchased explosion-proof electrical equipment should be accompanied by the manufacturer's factory certificate; e) Spare parts catalog (which can be compiled in the instruction manual). 9 Quality assurance period The manufacturer should ensure that the supplied explosion-proof hoist can work normally within 12 months from the date of use, but not more than 18 months from the date of shipment, under the conditions of proper storage, reasonable installation and correct use by the user. 264
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