JB/T 6273.2-1992 Technical requirements for small rural drinking water equipment
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T6273.2—92
Small rural drinking water equipment
Technical conditions
Published on June 10, 1992
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 1, 1993
Mechanical Industry Standard of the People's Republic of China
Small rural drinking water equipment
Technical conditions
Subject content and scope of application
JB/T6273.2-92
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, storage, etc. of small rural drinking water equipment (hereinafter referred to as drinking water equipment).
This standard applies to automatic and non-automatic drinking water equipment that integrates motors and water pumps to extract well water. 2 Reference standards
GB1182~1184
GB1804
GB5117
GB5171
GB9239
GB3216
GB/T13006
GB/T3214
GB/T12785
GB9651| |tt||GB2828
ZBK20002
JB/TQ367
JB/T6273.1
Types and basic parameters
Basic technical requirements for rotating electrical machines
Shape and position tolerances
Tolerance fit Limit deviations of dimensions without tolerances Carbon steel welding rods
General technical requirements for small power motors
Determination of the allowable imbalance of rigid rotor balance qualityTest methods for centrifugal pumps, mixed flow pumps, axial flow pumps and vortex pumpsPotential pressure margin of centrifugal pumps, mixed flow pumps and axial flow pumpsDetermination method of water pump flow rate
Test methods for submersible electric pumps
Test methods for single-phase asynchronous motors
Counting sampling procedures and sampling tables for remote batch inspection (applicable to inspection of continuous batches)Technical conditions for steel welded containers
Technical conditions for small submersible electric pumps
Technical conditions for cast iron parts for pumps
Types and basic parameters of small rural drinking water equipmentThe types and basic parameters of drinking water equipment shall comply with the provisions of JB/T6273.14 Technical requirements
4.1 General requirements
4.1.1 Drinking water equipment shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved through the prescribed procedures. 4.1.2 The drinking water equipment should be able to operate continuously and normally under the following conditions: a. The immersion depth is not less than 1m; b. The water temperature is not higher than 20℃ when the water pump is a submersible pump, and the water temperature is not higher than 50℃ when it is equipped with other water pumps; c. The volume ratio of solid impurities in the water does not exceed 0.01%, and the particle size is not greater than 0.2mm. 4.1.3 During the operation of the drinking water equipment, the changes in power supply voltage and frequency should comply with the provisions of GB755. Approved by the Ministry of Machinery and Electronics Industry on June 10, 1992, and implemented on July 1, 1993
JB/T6273.2-92
4.1.4 The manufacturer of the pressure tank must hold the "Pressure Vessel Manufacturing License" issued by the labor department before production. 4.2 Material requirements
4.2.1 The materials used in the manufacture of drinking water equipment that come into contact with water shall not pollute the water quality. 4.2.2 The main parts of drinking water equipment are recommended to be made of materials with performance not lower than that specified in the following table. If other materials are used, they must undergo on-site operation tests.
Part name
Sealing ring
4.3 Manufacturing requirements for main parts
Part name
Jet pump body
Medical tank
ZHMN58-2
Or HT200
4.3.1 The geometric tolerances of parts shall comply with the provisions of GB1182~1184. Generally, the radial runout shall not be less than the 8th grade precision, and the end face round runout shall not be less than the 7th grade precision.
4.3.2 The limit deviation of the tolerance size of the cutting process of parts shall be implemented in accordance with the provisions of GB1804. Generally, H14 is used for holes, h14 for shafts, and Js14 for lengths.
4.3.3 The casting quality of the pump shall comply with the provisions of JB/TQ367. 4.3.4 The weld of the pressure tank shall be uniform and free of defects, with a flat and smooth surface and shall comply with the provisions of JB741. The performance of the welding rod used shall not be lower than that of T42-2 in GB5117.
4.3.5 Bolts, nuts and other parts made of ordinary carbon steel shall be galvanized or otherwise treated for rust prevention. 4.3.6 The impeller shall be subjected to a static balance test, and the static balance quality grade shall be G6.3 grade specified in GB9239. The static balance allowable unbalanced moment shall be less than the calculated value in the following formula:
Where: M—allowable unbalanced moment, N·m; G—weight of the impeller, kg;
g—acceleration of gravity, m/g* (calculated as 9.81m/*); e allowable mass eccentric moment, m.
When the calculated impeller allowable unbalanced moment is less than 0.03R, it shall be calculated as 0.03R, where R is the radius of the impeller in m. 4.3.7 Pump housing, jet pump body, throat, pressure rod and other parts that bear water pressure should be subjected to a water pressure test of 1.5 times the working pressure but not less than 0.25MPa. The test should be carried out with clean water at room temperature for at least 5 minutes, and there should be no condensation or other phenomena. 4.3.8 Mechanical seals should be able to withstand wear and mechanical impact, and their service life should be not less than 4500h. During use, the amount of irrigation leakage should not exceed 2mL in 24 hours.
4.3.9 The pressure adjustment range of the pressure relay: the starting pressure is 0.1~0.12MPa, and the shutdown pressure is 0.18~0.21MPa; within the starting and shutdown pressure range, the relay should be flexible and reliable. 4.4 Motor performance requirements
4.4.1 The electrical performance of the matching submersible motor shall comply with the provisions of ZBK20002, and the electrical performance of other motors shall comply with the provisions of GB5171.
4.4.2 The insulation grade of the matching motor is Class B. When the ambient temperature does not exceed 40℃, the temperature rise limit of the motor (resistance method): for submersible motors, it shall not exceed 25K, and for other motors, it shall not exceed 80K. 4.5 Pump performance requirements
4.5.1 The performance parameters of the pump shall comply with the provisions of JB/T6273.1. 4.5.2 The deviation of the flow rate and head of the pump shall comply with the provisions of Class C in GB3216. 4.5.3 The cavitation margin of the pump shall comply with the provisions of GB/T13006. 2
JB/T6273.2---92
4.5.4 Sealing measures shall be taken for the mating surfaces of the stopper positioning of the pump parts. 4.6 Requirements for the whole machine
4.6.1 The automatic running drinking water equipment should be able to withstand a pressure test of 0.2MPa for 3 minutes without leakage. After the whole machine is assembled, the pump should rotate evenly without sticking, and the axial dynamic force of the impeller should meet the design requirements. 4.6.2
The surface should be painted with non-toxic decorative paint, and should be flat and bright without stains, bumps and cracks. 4.6.3
After the whole machine running test, the water in the cavity should be removed. 4.6.4
The drinking water equipment should be equipped with overheating or overcurrent protection devices. 4.6.5
The lead-out cable length of the drinking water equipment should not be less than 5m, and it can also be equipped according to the needs of the user. 4.6.6
Under the specified conditions of use, the average working time of the drinking water equipment before the first failure is not less than 2500h. 4.6.71
4.6.8 When drinking water equipment is used in water sources that do not meet the relevant regulations on rural sanitary drinking water, it should be equipped with filtering and firewood removal devices. 4.7 Quality assurance period
If the user correctly stores and uses it according to the operating and maintenance instructions, the manufacturer should ensure that the drinking water equipment can operate well within the use year (but not more than two years from the date of shipment from the manufacturer). If it is damaged or cannot work normally due to poor manufacturing quality within this specified period, the manufacturer should repair or replace parts or the whole machine for the user free of charge. 4.8 Complete set supply scope
Users can order all or part of the following complete set supply scope according to their needs, and should indicate it in the order form: Complete drinking water equipment;
Water outlet pipe, faucet;
Working pipe and suction pipe;
Pipeline connectors;
Wires and protective equipment;
Must-wearing parts;
Necessary installation and maintenance tools,
5 Test methods
The test methods for drinking water equipment shall be carried out in accordance with the provisions of GB3216, GB/T3214, GB/T12785 and GB9651. 6 Inspection rules
6.1 General provisions
6.1.1 Drinking water equipment must be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a product quality certificate before it can leave the factory. 6.1.2 Inspection is divided into factory inspection and type inspection. 6.2 Factory inspection
6.2.1 Each set of drinking water equipment must undergo factory inspection, and the inspection items are: a.
Appearance and operation inspection;
Connection dimension inspection;
Inspection of the integrity of supporting parts;
Measurement of the cold insulation resistance of the motor winding to the casing; Determination of the working pressure of the pressure switch;
Pressure resistance test of the whole machine.
6.3 Type inspection
Type inspection must be carried out in any of the following situations: a.
When the manufacturer produces for the first time after the signature or when the production is transferred to another factory; when there are major changes in design, process or materials, which are sufficient to cause changes in product performance; b.
When the inspection results of factory inspection and other inspections deviate greatly from the inspection results conducted previously; c.
JB/T6273.2—92
d. Regular sampling of mass-produced products, the sampling time is at least once a year (reliability test is conducted once every 3 to 5 years, and at least 3 units are sampled for testing each time)
8. When the product is resumed after a long period of suspension; f. When the national quality supervision agency proposes a requirement for type inspection. 6.3.2 The items of type inspection are:
All items of factory inspection;
Measurement of motor current and power;
Measurement of motor slip;
d:·Measurement of motor temperature rise;
Measurement of water pump flow, suction and head; e.
Measurement of water quality flowing through drinking water equipment;
Reliability test of the whole machine.
6.4 The user has the right to conduct sampling inspection on the product according to this standard. The sampling plan and judgment principle shall be in accordance with the provisions of GB2828, and the details shall be agreed upon by the supplier and the thunder supplier.
7 Marking, packaging and storage
7.1 Marking
The material of the nameplate and the method of engraving the text and data on the nameplate should ensure that the writing is not easily obscured during the entire service life of the drinking water equipment. The nameplate should be fixed on a conspicuous part of the equipment and should include the following contents: manufacturer's name;
product name;
product model;
rated speed, r/min;
rated power, W;
rated voltage, V;
rated current, A;
number of phases;
rated flow, m*/h;
suction head, m;
ground head, m;
frequency, Hz;
machine weight, kg;
overall dimensions (length×width×height), m;
factory number.
There should be grounding screws and grounding marks on the housing of the drinking water equipment, and the marks should not be easily worn during the service life of the equipment. 7.1.3
There should be a turning mark on the obvious part of the pump housing or pump cover of the drinking water equipment. 7.1.4
7.2 Packaging
The product packaging should ensure that it will not be damaged during normal transportation. The packaging requirements can be agreed upon by the supply and demand parties according to the user's requirements. The text and marks on the outside of the product packaging box should be clear and neat, and the contents are as follows: the name of the shipping station and the manufacturer;
the name of the receiving station and the receiving unit;
the product model, name and factory abbreviation;
the net weight of the product and the gross weight of the packaging box, kg; d.
the mark of not allowing inversion;
f. the size of the packaging box (length × width × quotient), m. JB/T6273.2—92
7.2.3 The following technical information should be attached to the product packaging box and sealed in a waterproof plastic bag: a. Packing list;
b. Product certificate;
Product installation and use instructions. www.bzxz.net
7.3 Purchase and storage
7.3.1 The product storage area should be dry and ventilated, and prevent rust and damage. When the product is stored in the open air, it should be equipped with rain and sun protection facilities. 7.3.2
Additional instructions:
This standard is proposed and managed by the Chinese Academy of Agricultural Mechanization Sciences. This standard is under the responsibility of the Institute of Irrigation and Drainage Machinery of the Chinese Academy of Agricultural Mechanization Sciences. The main drafters of this standard are Xu Anxiang and Zhang Qingfan. People's Republic of China
Mechanical Industry Standard
Rural Small Drinking Water Equipment
Technical Conditions
JB/T6273.2--92
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
No Reproduction
Copyright reserved
Format 880×1230
1/16 Sheet 1/2
Word Count 10,000
First Edition June 1993 First Printing June 1993 No. 08912
Additional Notes:
This standard is proposed and managed by the Chinese Academy of Agricultural Mechanization Sciences. This standard is under the responsibility of the Institute of Irrigation and Drainage Machinery of the Chinese Academy of Agricultural Mechanization Sciences. The main drafters of this standard are Xu Anxiang and Zhang Qingfan. People's Republic of China
Mechanical Industry Standard
Rural Small Drinking Water Equipment
Technical Conditions
JB/T6273.2--92
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
No Reproduction
Copyright reserved
Format 880×1230
1/16 Sheet 1/2
Word Count 10,000
First Edition June 1993 First Printing June 1993 No. 08912
Additional Notes:
This standard is proposed and managed by the Chinese Academy of Agricultural Mechanization Sciences. This standard is under the responsibility of the Institute of Irrigation and Drainage Machinery of the Chinese Academy of Agricultural Mechanization Sciences. The main drafters of this standard are Xu Anxiang and Zhang Qingfan. People's Republic of China
Mechanical Industry Standard
Rural Small Drinking Water Equipment
Technical Conditions
JB/T6273.2--92
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
No Reproduction
Copyright reserved
Format 880×1230
1/16 Sheet 1/2
Word Count 10,000
First Edition June 1993 First Printing June 1993 No. 0891
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