JB/T 7876.2-1999 JB/T 7876.2-1999 Technical requirements for manual pumps JB/T7876.2-1999 Standard download decompression password: www.bzxz.net

ICS65.060.35
Machinery Industry Standard of the People's Republic of China
JB/T7876.2-1999
Hand Pump
Technical Requirements
Technical requirements for hand pump1999-08-06 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T.7876.2-1999
This standard is a revision of JB/T7876.2-95 "Technical Requirements for Hand Pump". Editorial changes were made to the original standard during the revision, and the main technical content remained unchanged.
This standard replaces JB/T7876.2-95 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Agricultural Machinery Standardization. The responsible drafting unit of this standard is: China Agricultural Mechanization Science Research Institute. The main drafter of this standard: Wu Tonglin.
Machinery Industry Standard of the People's Republic of China
Hand Pump
Technical Conditions
Teehnical requirements for hand pumpJB/T 7876.2-1999
Replacement of JB/T 7876.2-95
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of hand pumps. This standard is applicable to piston pumps, diaphragm pumps and screw pumps (collectively referred to as hand pumps, hereinafter referred to as pumps) that pump water at normal temperature and are driven by manpower. Other types of manual pumps can also be implemented by reference. Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB/T 6991999
GB/T 700-1988
GB/T 985-1988
GB/T986—1988
GB/T 1184-1996
GB/T1220—1984
GB/T1804—1992
GB/T28281987
GB/T 6414—-1986
GB/T9439—1988
GB/T 13306--1991
GB/T13384—1992
JB/T 7876.1—1999
JB/T7876.3—1999
3 Technical requirements
High-quality carbon structural steel
Carbon structural steel
Basic forms and dimensions of weld grooves for gas welding and manual arc weldingBasic forms and dimensions of weld grooves for submerged arc weldingTolerances of shape and positionTolerance values ​​not indicated
Stainless steel bars
General tolerancesTolerances not indicated for linear dimensions
Batch-by-batch inspectionCount sampling procedures and sampling tables (applicable to inspection of continuous batches)Dimensional tolerances of castings
Grey cast iron parts
General technical conditions for packaging of electromechanical products
Types and basic parameters of manual pumps
Manual pumps
Test methods
3.1 The pumps shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved through the prescribed procedures. 3.2 The type, model and basic parameters of the pump shall comply with the provisions of JB/T7876.1. 3.3 The working conditions of the pump shall comply with the following provisions: a) The water temperature shall not be higher than 40℃; b) The sand content in the water (mass ratio) shall not exceed 0.1% for piston pumps and 0.01% for screw pumps. c) The pH value of the water shall be 6.5~8.5; approved by the State Machinery Industry Bureau on August 6, 1999 and implemented on January 1, 2000. d) The water shall not contain oil; JB/T7876.2—1999. e) The suction pipe of a shallow well pump can be directly inserted into the ground; a deep well pump should be installed in a straight well with a well wall pipe. 3.4 For pumps used for drinking water, the material and coating of the parts in contact with drinking water must be non-toxic. 3.5 The materials of the main parts of the pump cylinder components shall comply with the provisions of Table 1. Other substitute materials can also be selected under the premise of ensuring the design and use requirements.
Table 1 Materials of main parts of pump cylinder components
Piston
Diaphragm
Screw pump
Parts name
Seal ring
Disc valve seal
Disc valve seal
Disc valve seal
Cloth-reinforced rubber
40Cr or 45 steel hard chrome plating
Applicable material standards
GB/T9439
GB/T9439
GB/T1220
GB/T9439
GB/T699
GB/T 1220
The materials of main parts of pump transmission components shall comply with the provisions of Table 2. Under the condition of ensuring the design and use requirements, other substitute materials can also be selected.
Table 2 Main parts materials of pump transmission components
Piston pump
Diaphragm pump
Screw pump
Part name
Pin bushing
Pin bushing
Transmission shaft
Coupling
Big gear
Pin gear
The technical conditions of pump materials shall comply with the provisions of relevant standards. Material
Tin bronze or powder metallurgy
Tin bronze or powder metallurgy
The technical requirements and dimensional tolerances of cast iron parts shall comply with the provisions of GB/T9439 and GB/T6414. Applicable standards for materials
GB/T700
GB/T 699
GB/T 699
GB/T699
GB/T699
GB/T9439
GB/T699
JB/T7876.2-1999
5.9 The basic type and size of welding joints shall comply with the provisions of GB/I985 and GB/I986. The weld shall not have cracks, slag inclusions, pores, or undercuts. During operation, the weld shall not cause overheating or other defects that affect the quality of parts. 3.10 The surface roughness of the main parts of the pump shall comply with the provisions of Table 3. Table 3 Surface roughness of main parts of pump
Part name
Piston pump cylinder
Disc valve, valve seat pin
Shaft, pin bushing
Tie rod and transmission shaft
Water inlet and outlet joints
Part name
Inner surface
Outer cylindrical surface, two end surfaces
Seal surface
Friction surface
Friction outer surface
Grinding outer surface
Seal surface
The surface of the diaphragm should be smooth and flat, without scratches, nicks and other defects that affect the quality. The sealing surface of the disc valve should not have defects such as rust, knife marks, sharp edges and cracks. Arithmetic mean deviation of the profile R. μm
Except for the edge, the entire chrome plating layer on the rotor surface should be glossy and uniform, without obvious particles, and no defects such as dendrites, cracks, blistering, peeling and pinholes are allowed.
3.14 The dimensions without tolerances shall be determined according to the m-level tolerance grade in GB/T.1804-1992. 5 The shape and position tolerances without shape and position shall be determined according to the K-level tolerance grade in GB/T1184-1996. 3.15
Appearance of the pump: the casting shall not have burrs; the paint coating shall not have defects such as wrinkles, peeling, siltation, etc. The pump shall be subjected to a leakage test, the shallow well pump shall be conducted at normal pressure: the deep well pump shall be conducted at 1.5 times the rated working pressure. Within 10 minutes of holding force, the leakage shall not exceed 1.0mL. 3.18
The shallow well pump shall ensure that it can be started and operated normally without water diversion after being shut down for 24 hours. Reliability: The average working time before the first failure of the pump is not less than 1500 hours for piston pumps and screw pumps, and not less than 1000 hours for diaphragm pumps. No parts shall be replaced during the test. 3.20 Scope of supply of complete sets of pumps:
a) Pumps and various specified accessories;
b) Special tools required for installation and maintenance; c) Pump wearing parts, see Table 4;
d) Factory packing documents of the pump.
Test method
Piston pump
Diaphragm pump
JB/T7876.2-1999
Table 4'Pump wearing parts
Test method shall be carried out in accordance with the provisions of JB/T7876.3 and relevant standards. Inspection rules
Inspection is divided into factory inspection and type inspection.
5.1 Factory inspection
Part name
Seal ring
Pin bushing
Pin bushing
5.1.1Pumps produced in batches shall pass the factory inspection and be accompanied by product certificates and instructions before they can leave the factory. 5.1.2 Inspection items:
a) Pump appearance;
b) Leakage test;
c) Diaphragm pump diaphragm, piston pump plate valve, screw pump rotor quality: d) Flow rate, total head or suitable suction head, total efficiency, volumetric efficiency of the pump's specified performance point; e) Completeness of the set.
5.1.3 Sampling inspection and judgment and disposal rules shall comply with the provisions of GB/T2828. A normal inspection sampling plan can be used. The inspection batch is the monthly (or) daily output of the product or the order batch (sets) at one time. The inspection level is general inspection level II, and the qualified quality level (AQL) is 4.0; it can also be determined by negotiation between the supply and demand parties. 5.1.4 After the test, the pump should be cleaned and treated with rust prevention. 5.2 Type inspection
5.2.1 Type inspection should be carried out in any of the following situations: a) When a new product or old product is transferred to the factory for trial production and identification; b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) When the product is resumed after a long period of suspension; d) When the batch-produced products are inspected periodically (at least once a year); JB/T7876.2—1999
e) When the factory inspection results are significantly different from the last type inspection:) When the national quality supervision agency proposes a type inspection requirement. The inspection items are all the technical requirements specified in this standard. 5.2.2
5.2.3 The sampling inspection and judgment and disposal rules for type inspection shall comply with the provisions of GB/T2828. It is recommended to adopt a normal inspection single sampling plan. The inspection batch shall meet the sample size of at least 2 units, the inspection level is special inspection level S-1, and the acceptable quality level (AQL) is 6.5.
6 Marking, packaging, transportation and storage
6.1 Marking
6.1.1 Label
Each pump shall be firmly provided with a product label in an obvious position, and its size and technical requirements shall comply with the provisions of GB/T13306. The label content shall include:
a) Manufacturer name and trademark:bzxz.net
b) Product name and model;
c) Specified main parameters: suction head or field head (m); flow rate (m2/h), reciprocating times (min) [or rotation speed (r/min)], water inlet diameter (mm);
d) Factory date and factory number;
e) Implementation product standard number.
6.2 Packaging and transportation
6.2.1 The packaging of the pump shall comply with the provisions of GB/T13384. Special packaging can be determined by negotiation between the supply and demand parties. 6.2.2 Each pump shall be accompanied by the following accessories and documents when it leaves the factory. The documents shall be sealed in a waterproof bag: a) Product certificate; b) Installation and operation manual (including installation layout); c) Random accessories, T-tools and lists. The markings on the outer surface of the packaging box shall be clear and complete. The markings shall generally include the following: 6.2.31 a) Receiving unit and address: b) Manufacturer's name or trademark: c) Product name and model; d) Packing box dimensions (length × width × height), mm; e) Gross weight, kg; f) Transportation mark; g) Shipping date. 6.2.4 Measures shall be taken to ensure that the pump will not be damaged due to vibration and collision during transportation, loading and unloading. 6.3 Storage
The manufacturer should take measures to ensure that the user will not rust or damage within 6 months under normal storage conditions. 3
Chinese
Mechanical Industry Standard
Manual Pump
Technical Conditions
JB/T 7876.21999
Published by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2, Shouti South Road, Beijing
Format: 880×1230
Postal Code: 100044)
1/16 Printing Sheet: 1/2
Word Count: 12,000
First Printing in April 2000
First Edition in April 2000
Price: 5.00 Yuan
Print Quantity: 1-500
99-1435
Mechanical Industry Standards Service Network: http://www.jb.ac.cn6628000
First printing in April 2000
First edition in April 2000
Price 5.00 yuan
Print run 1-500
99-1435
Mechanical Industry Standard Service Network: http://wwwJB.ac.cn6628000
First printing in April 2000
First edition in April 2000
Price 5.00 yuan
Print run 1-500
99-1435
Mechanical Industry Standard Service Network: http://wwwJB.ac.cn6628
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