JB/T 6762-1993 Technical requirements for flameproof submersible electric pumps for mining
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T6762-1993
Technical Conditions for Flameproof Submersible Electric Pumps for Mining
Published on August 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on October 1, 1993
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Flameproof Submersible Electric Pumps for Mining
1 Subject Content and Scope of Application
JB/T6762-1993
This standard specifies the types and basic parameters, technical requirements, inspection rules, test methods, marking and packaging of flameproof submersible electric pumps for mining (hereinafter referred to as submersible electric pumps).
This standard applies to flameproof three-phase submersible electric pumps with flow rates of 3~600m2/h, lifts of 3~50m, and powers of 0.55~30kW, which are used for drainage of underground mining faces in coal mines where there is a risk of methane or coal dust explosion. 2
Referenced standards
Rotating electrical machines
Basic technical requirements
Motor housing protection classification
GB/T12785
GB12665
Submersible electric pump test methods
General requirements for explosion-proof electrical equipment for explosive gas environments, explosion-proof electrical equipment for explosive gas environments, damp heat test requirements for "d" motors used under general environmental conditions, packaging, storage and transportation, graphic symbols
ZB J71 017
JB5118
Types and basic parameters of centrifugal sewage submersible electric pumps Types and basic parameters of agricultural sewage and sewage submersible electric pumps Types and basic parameters of electric pumps
The electric pump is a vertical structure, and the pump is coaxial with the motor. The housing protection level of the electric pump is IP×8 (see GB4942.1). The rating of the electric pump is a continuous rating based on the continuous duty system (S1). The rated frequency of the electrical system is 50Hz, and the rated voltage is 380V, 660V or 380V/660V. The synchronous speed of the electric pump is 3000r/min or 1500r/min. The impeller rotates counterclockwise when viewed from the water inlet of the electric pump. The structural type of the electric pump is a lower pump type in which the pump is placed under the motor. The motor is a dry structure. The electric pump shall be made into the flameproof type specified in GB3836.1, and the explosion-proof mark is \d1". Model representation method
The capital Chinese pinyin letters in the model represent the type and characteristics of the electric pump. Approved by the Ministry of Machinery Industry on August 21, 1993
Implementation on October 1, 1993
JB/T6762—1993
Rated power of electric motor, kW
Rated head of electric pump, m
Rated flow of electric pump, m*/h
Submersible electric pump
3.3 The rated power of the motor of the electric ticket shall be as follows: 0.55.0.75, 1.1, 1.5.2.2, 3, 4, 5.5, 7.5.11, 15, 18.5, 22, 30kW3.4 The basic parameters of the electric ticket shall comply with ZBJ710 17 or JB5118 (except the efficiency of the electric pump). Technical requirements
The electric pump shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. The electric pump shall be able to operate continuously and normally under the following conditions of use: a.
The underwater depth of the electric pump shall not exceed 5m;
The water temperature shall not exceed +40C;
The pH value of the water is 5-9;
The volume ratio of the impurities in the water shall not exceed 2%; The size of the solid particles in the water shall not exceed 15mm+The gravity of the water shall not exceed 11kN/m; The sea level shall not exceed 1000m.
The explosion-proof performance of the electric pump shall comply with the provisions of GB3836.2. In clean water at normal temperature, when the flow rate of the electric pump is rated, the head and pump efficiency shall comply with the provisions of ZBJ71017 or JB5118 . The tolerances of the electric pump flow, head and water pump efficiency shall comply with the provisions of Class C in GB/T12785. When the water pump efficiency is higher than the specified value, the flow and head tolerances shall only test the lower limit of the ellipse. 5 In the range of 0.7 to 1.3 times the rated flow, when tested with clean water, the shaft power of the water pump shall not exceed 4.6
0.91 times the rated power of the motor.
4.7 During the operation of the electric pump, the changes in the power supply voltage and frequency and their impact on the motor performance and temperature rise limit shall comply with the provisions of GB755.
4.8 The performance of the motor shall meet the following requirements: 4.8.1 When the power, voltage and rate are rated values, the guaranteed values of efficiency, power factor and slip rate shall comply with the provisions of Table 1. 2
Rated power
JB/T6762-199 3
Step speed
Power factor
When measuring efficiency, the loss of the motor includes the mechanical loss of the sealing device and the copper loss of the 5m cable. At rated voltage, the guaranteed value of the motor's stall torque is 1.8 times the rated torque. At rated voltage, the guaranteed value of the motor's maximum torque is 2.2 times the rated torque. At rated voltage, the guaranteed value of the motor's stall current shall comply with the provisions of Table 2. Table 2
Rated power
0.55,0.75
Stapping current/
Slip rate
Not greater than
Rated current
Note: The rated current is obtained using the rated power, rated voltage, and the guaranteed values of efficiency and power factor (excluding tolerance). The tolerance of the guaranteed value of the motor's electrical performance shall comply with the provisions of Table 3. 4.8.5
4.8.6 The motor shall be insulated in Class F, but the temperature rise limit of the stator winding shall be assessed in accordance with Class B. When the electric pump is fully submerged in water and operates at rated power, the temperature rise limit of the stator winding (resistance method) is 80K. The maximum surface temperature of the housing (thermometer method) under rated operating conditions shall not exceed 150°C.
The insulation resistance of the motor stator winding to the housing should not be less than 100MQ at room temperature, and should not be less than 1.oMa when it is close to the working temperature.
Reliability()
Power rating (c0ng)
Maximum transfer chain
Stalling torque
Transfer battery
JB/T6762-1993
(1-c08)/6At least 0.02
Guaranteed value -10%
Guaranteed value -15%
Only when it is determined》
Select every ten starts
+25% (positive tolerance is only required by the user
When the motor is powered by a five-barrel parallel power supply, the three-pole no-load electric power of the motor is The difference between one phase and the three-phase average value shall not exceed 10% of the three-phase average value:
After the electrical system is assembled, the motor stator winding shall be able to withstand a withstand voltage test for 1m without breakdown. The rated voltage of the test voltage is 50+V and may be sinusoidal in shape. The effective value of the test voltage is 1760V for the rated voltage of 380V and 2320V for the rated voltage of 660V. When a large number of continuously generated electrical systems are inspected and tested, a test voltage of 120% of the test voltage duration is allowed. The test voltage is increased by a test pen.
When performing the test, the withstand voltage test of the stator is carried out when the windings are close to the working temperature. 4.8.10 The stator assembly of the motor shall be able to withstand the impulse voltage test without breakdown. The test The transmission voltage (peak value) is in accordance with the provisions of the table.
Rated power
Stable voltage.V
Peak voltage
4.8:11 After the electrical system is tested for 12 cycles in the 40C alternating damp heat test method specified in GB12665, the insulation resistance of the motor circuit group shall not be less than 1.14M0 (rated voltage is 380V) and the 1-98M0 rated voltage is 560V). The bed can withstand the voltage test for 1m without breakdown: the effective value of the test voltage shall be 1500V (rated voltage is 380V) or 1976V (rated voltage is 560V). The sample shall not break down and the A-weighted acoustic power level of the motor shall not exceed 1.14M0 (rated voltage is 380V) and 1.98M0 (rated voltage is 560V). The test voltage shall be 1500V (rated voltage is 380V) or 1976V (rated voltage is 560V). The sample shall not break down and the ... According to the provisions of Table 5: Table 5
Energy constant kw
Acoustic fruit bacteria
1500.t/ml
20co+t/min
The difference between the sound number and the customer is + + 3B (A).
4.8.13 The effective value of the standard dynamic continuity of the motor when it is no-load is 4.5mm/s. 4.9 The parts that bear pressure should be subjected to water (air 2 pressure test, the test pressure is 1-5 working pressure, but not less than 0.2MP, and the duration of smin shall not have any deterioration phenomenon
After the motor is assembled, the inner cavity and the sealing chamber of the motor can withstand 5n mountain no.2MPa.
Air pressure test tire no humidity Rui technology
·Test pressure is not less than
4.11 The lead-out cable of the electric pump shall be connected with a U-shaped rubber sleeve soft cable group. The length of the cable shall generally be not less than 10M, and the cable can be provided in full. 1254
4.12 Effective anti-corrosion measures shall be taken for the electric pump. JB/T6762-1993
4.13 The electric pump shall have a reliable grounding device, and the internal and external grounding devices and signs shall comply with the provisions of GB3836.1. There shall be an obvious grounding mark on the grounding wire of the lead-out cable. And it shall be ensured that the grounding mark is not easily erased during the service life of the electric pump. 4.14 When the electric pump is used under the specified conditions, during the 2000h operation period, the leakage of its sealing device shall be calculated in 24h, and the rated power shall be 7.5kW and below, and shall not be greater than 2.4ml; for those above 7.5kW, it shall not be greater than 3.6ml. 4.15 When used under the specified conditions, the average trouble-free operation time of the electric pump is 2000h. 4.16 The impeller shall be subjected to a static balance test. The allowable unbalanced moment of static balance is calculated according to formula (2): M≤9.81·me(Nm)...
The mass of a single impeller, kg.
Wherein: m—
e—allowable eccentricity, m.
When the synchronous speed is 3000r/min, +e is 2×10-5m; when the synchronous speed is 1500r/min, e=4×10-5m. ..(2)
When the calculated allowable unbalanced moment of the impeller is less than 0.03R(N·m), it is calculated as 0.03R(N·m), where R(m) is the radius of the impeller weight-removing part.
The impeller with single blades shall also be subjected to dynamic balancing test, and the unbalanced torque allowed by dynamic balancing shall be half of the unbalanced torque allowed by static balancing 4.17
When inspecting and testing the electric pump, the no-load current, no-load loss, stall current and stall loss shall be controlled within a certain range to ensure that the performance of the motor meets the provisions of Article 4.8.1. The specific control values shall be determined by the manufacturer. 4.18 For electric pumps produced in batches, the efficiency of the electric pump shall be controlled within a certain range during factory spot checks to ensure that the efficiency of the water pump meets the provisions of Article 4.4 and the efficiency of the motor meets the provisions of Article 4.8.1. The control range shall be determined by the manufacturer. 4.19 The assembly of the electric pump shall be complete and correct, with complete nameplates and signs. The surface paint shall be dry and complete, without stains, magnetic damage and cracks. 4.20 The electrical system shall rotate freely, smoothly and briskly, without stuck or stagnant phenomena. Inspection rules
Electric pumps should obtain the "explosion-proof certificate" and "safety mark" issued by the explosion-proof inspection unit. 5.1
Each electric pump must pass the inspection before it can leave the factory, and it should be accompanied by a product certificate. The inspection and test items include:
Appearance and rotation inspection:
Determination of the DC resistance of the motor stator winding in the actual cold state; Determination of the cold insulation resistance of the motor stator winding to the casing: Withstand voltage test:
Electric pump water (gas) pressure test;
Inter-turn impulse withstand voltage test;
Determination of the no-load current and no-load loss of the motor; Note: The no-load character curve needs to be measured during the type test. h.wwW.bzxz.Net
Determination of the motor blocked current and blocked loss: Note: The blocked character curve needs to be measured during the type test. i.
Measurement of the efficiency and head of the electric pump at rated flow rate; measurement of the shaft power of the electric pump within the range of 0.7 to 1.3 times the rated flow rate; inspection contents specified in GB3836.2 in the drawings of the electric pump and its parts. For example: shell water pressure test, inspection of the electrical clearance and creepage distance between different potentials in the junction box, inspection of flameproof parameters, inspection of nameplate, internal and external grounding, explosion-proof mark and safety mark, etc. Note: i.) Two tests can be spot checked.
1 Type tests must be carried out in any of the following situations: 5.4
When new products are trial-made;
JB/T6762-1993
After formal production, if there are major changes in structure, materials, and production processes, which may affect product performance; when the inspection test results are significantly different from the results of the last type test; regular spot tests of electric pumps produced in batches, once a year; when the product is resumed after long-term suspension of production. The type test items of electric ticket include:
All items of inspection test, but item c of Article 5.3 should measure the hot insulated resistance: temperature rise test;
Measurement of hydraulic characteristic curve of electric pump (including head-flow curve, shaft power-flow curve, pump efficiency-flow curve); measurement of load characteristic curve of motor (including: efficiency-output power curve, power factor-output power curve, input power-output power curve, stator current-output power curve, slip-output power curve); e.
Measurement of maximum torque of motor;
Measurement of noise of motor;
Measurement of vibration of motor.
5When trial production of new products and changes of sealing devices may affect the sealing performance, the leakage measurement of sealing devices must be carried out in accordance with the provisions of Article 4.16.
5.7When trial production of new products, the mean trouble-free operation time must be measured in accordance with the provisions of Article 4.17. 5.8 The test of the protection grade of the electric pump casing can be carried out when the product structure is finalized or when there are major changes in the structure and process. 5.9
When any of the following situations occurs, the drawings and documents must be reviewed and the sample explosion-proof test must be carried out in accordance with the provisions of GB3836.2: Products that have not obtained the "explosion-proof certificate" and "safety mark"; a.
For products that have obtained the "explosion-proof certificate" and "safety mark", when local changes are made and the relevant provisions on explosion-proof performance are involved, the changes shall be made b.
Part of the drawings and relevant instructions shall be sent to the original inspection unit for re-inspection; When products that have obtained the "explosion-proof certificate" and "safety mark" are transferred from the original manufacturer for re-production: c.
When the inspection unit needs to re-inspect the products that have been issued with the "explosion-proof certificate and safety mark". In addition to the items specified in Article 5.5, the test items shall also be Including: inspection of shell casting material (including material strength and shell impact strength); clamping test, sealing performance test, mechanical strength test of wire entry device; explosion-proof performance test; alternating damp heat test; shell surface temperature test; connector torsion test; rubber material aging test, etc. 6 Test method
6.1 Nameplate, internal and external grounding, explosion-proof mark, safety mark, etc. are inspected by visual inspection. 6.2 The electrical clearance and creepage distance between different potentials in the junction box, explosion-proof parameters, etc. are inspected by measuring tools. 6.3 Tests on shell impact strength, connector torsion, shell surface temperature, wire entry device clamping, rubber aging, etc. are carried out in accordance with the provisions of GB3836.1. Tests on explosion-proof performance, sealing performance, mechanical strength, shell water pressure, etc. are carried out in accordance with G The alternating damp heat test shall be carried out in accordance with the provisions of GB2423.4.
6.4 The test method for the enclosure protection level shall be carried out in accordance with the provisions of GB4942.1, and the air pressure test specified in Article 4.11 may be used instead of 6.5 The tests of items b, C, d, f, g, h, i, j in Article 5.3 of this standard and items bc, d, e, f, g in Article 5.5 shall be carried out in accordance with the provisions of GB/T12785.
7 Marking and packaging
The nameplate material shall be made of brass, bronze or stainless steel, and its thickness shall not be less than 1mm. 7.1
The engraving method of the data on the nameplate shall ensure that its handwriting is not easily erased during the entire service life of the electric pump. 7.2
7. 3 The nameplate should be fixed on the upper part of the electric pump, and the items to be indicated are as follows: manufacturer's name;
electric pump model and name;
explosion-proof mark "EXdI";
explosion-proof certificate number;
safety mark number:
rated flow;
rated head;
water outlet diameter;
rated power;
rated frequency;
rated voltage;
rated current;
rated speed;
number of phases;
insulation grade or temperature rise;
manufacturer's product number and year and month of production;
electric weight:
standard number;
product number.
JB/T6762-1993
Clear permanent embossed marks "Exd1" and "MA\" should be set on the obvious places of the electric pump shell. The electric pump should have obvious direction marks.
The words and marks on the outer wall of the packaging box should be clear and neat, and the contents are as follows: a.
Shipping station and manufacturer name;
Receiving station and receiving unit name;
Electric pump model and factory number;
Electric pump net weight and gross weight with packaging;
Box size;
Necessary words and patterns such as "Handle with care" should be marked on appropriate parts of the packaging box. The graphics should comply with the provisions of GB191. The packaging of the electric pump should ensure that it will not be damaged due to poor packaging under normal transportation conditions. Each electric pump should be accompanied by the following random documents and attachments: a.
Packing list;
Product certificate;| |tt||Operation and maintenance instructions;
Necessary accessories.
Additional notes:
This standard is proposed by the Shanghai Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard is under the jurisdiction of the Shanghai Electric Science Research Institute of the Ministry of Machinery and Electronics Industry, and the explosion-proof technology is under the jurisdiction of the Nanyang Explosion-proof Electrical Research Institute. This standard was drafted by the Shanghai Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. The main drafters of this standard are Zhang Qiaoying, Zhao Lifu and Li Shengnian.
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Flameproof Submersible Electric Pumps for Mining
JB/T 67621993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Postal Code: 100044)
Word count XXX,XXX
Format 880×1230
Print Sheet X/X
Edition X, XX, 19XX
Printing X, XX, 19XX
Number of copies 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standards Service Network: http://www.JB.ac.cn669
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