Some standard content:
ICS23.t00.30
Machinery Industry Standard of the People's Republic of China
JB/T103702002
Hydrauliefluid powcrsequcncevalvc2002-12-27 Issued
2003-04-01 Implementation
The State Economic and Trade Commission of the People's Republic of China Issued Foreword
■ Scope,
2 Regulatory references
3 Terms and definitions
4 Quantity, derivative number and homography
5 Marking and sample number.
5.1 Marking.
5.2 Basic number
6 Resistance requirements...
General requirements
6.2 Performance requirements..
Assembly requirements
5.4 External system requirements
Performance test methods..
7.1 Test equipment
Test cost
Test items and test methods
Assembly appearance inspection method
Inspection rules
Inspection classification
9.2 Sampling.
9.3 Determination rules...
1 Core marking, packaging, pollution transportation and
Appendix (summary Appendix Test summary and characteristic curve load, A. Test path
A.2 Characteristic point line
Figure A. 1. Output test circuit
. A.2. Test circuit
. A.3. Inlet pressure-internal leakage characteristic curve A.4. Inlet pressure-external leakage characteristic curve A.5. Flow forward pressure loss characteristic curve A.6. Flow reverse pressure loss characteristic curve A.7. Equal pressure characteristic curve
. A.8. Flow-minimum setting stop characteristic curve A.9. Adjustment pressure-adjustment torque characteristic curve
. A.1. Flow cascade changes when the test plate is tested 4 inlet and outlet set stop pressure response characteristics Curve graph AI
Pressure and pressure characteristic curve:
Table 1 Quantity, symbol and unit
JE/T10370-2002
JB/T10370—2002
Table 2 Allowable variation range of average display value of sensitive control parametersTable 3 Allowable system tolerance of control system
Table 4 Factory test items and test methods.
Table 5 Type test items and test methods
Table 6 Inspection methods for assembly and appearance
Record A of the standard is a normative appendix.
This standard is proposed by China Machinery Industry Federation. Foreword
The standard is formulated and compiled by the National Pressure Pneumatic Standardization Technical Committee, JI/E10970—2002
The drafting units of this standard are: Shanghai Screen Pressure Pneumatic General Corporation, Beijing Machinery City Industrial Automation Research Institute, Shanghai Lixin Hydraulic Parts Factory, Dalian Combined Machine Research Institute Pressure Technology Co., Ltd. The main drafters of this standard are: Jiangen, Sun Jianxin, Zhao Shoulin, Huang Shili, and Lin Guang. This standard is published for the first time:
1 Scope
Hydraulic sequence valve
JH/T 103702002
This standard specifies the basic parameters, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of the internal control sequence valve, external control sequence valve, internal control single-stage sequence valve, external control one-way sequence valve and its variants: internal control balance valve, external control balance valve, unloading valve, one-way unloading valve: sequence back pressure valve (hereinafter referred to as sequence valve). This standard is applicable to threaded connection, plate connection and D-type connection of hydraulic pressure valve or other liquids with equivalent performance as working medium.
2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all referenced documents with a date, all subsequent amendments (excluding revisions) or sub-editions are not applicable to this standard. However, parties to a document or agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions are applicable to this standard. GB/T786.1 Compressed gas graphic symbols G/T786.1—1993, cq1SO1219-1:[991FuipaerysendGiaphic sysnbols and circuit diagransPart I:Graphic symblstpoas
GA/T2346
Pneumatic system and parts nominal pressure series batch inspection counting sampling procedures and throwing tables (applicable to continuous batch inspection: GB/T2828
Pressure component screw extension oil port type and size GB/T2878.
G/T7935
Pressure component general installation conditions
GH/T8099
GBT&EO
Pressure stack valve installation surface
Pressure connection pressure control, frequency reduction, energy saving, throttling and one-way installation, installation surface GB Hall 14039-2X2 hydraulic transmission oil particle size level code (GB/T14039-2002: IS044061999, MOD:
GB/T17446
Terminology of fluid transmission system and components (GB/T17446-1998.dIS5598:1985) GB/17489 Classification of three types of particulate matter from the working system pipeline (GB/T17489-1998, idISC4031:1992
BTT858 Hydraulic component cleanliness assessment method and hydraulic component cleanliness index 3 Terms and definitions
The following technical specifications and definitions are established in GBT17446 and are applicable to this standard. 3.1
Nominal flow
Nominal flow of the valve
Test flow test ow
The test valve is subjected to the test. The ... 1MPa:
stenin)
A clear and permanent mark or nameplate should be made at an appropriate and obvious position on the product. The content of the mark or nameplate should comply with the provisions of 0BT7935, and the graphic symbol used should comply with the provisions of GBT786.1. 52 Basic parameters
The basic symbols of the frequency series should include: nominal pressure, nominal flow, nominal diameter, rated flow, pressure regulation range, etc. 6 Technical requirements
61 First requirements
6.1.1 The nominal pressure series should comply with the provisions of BT2346. 6.1.2 The plate-type installation shall comply with the provisions of GB/T8100, the superimposed installation shall comply with the provisions of GB/180 or 180, 6.1.3 The type and size of the frequency-corrugated oil port shall comply with the provisions of GBT2878 B.1.4 Other technical requirements shall comply with the provisions of GB/7035, 6.1.5 The manufacturer shall specify the applicable conditions and environmental requirements of the product in the product samples and related materials. 6.2 Performance requirements
The performance requirements of sequence valve are included in:
a) Pressure loss:
b) Pressure deviation:
Internal leakage:
External leakage:
Forward pressure loss:
Reverse pressure loss:
Dynamic flow characteristics:
Action reliability:
Adjusting torque:
Specifications:
JB/T10370—2002
1) Sealing: Under rated operating conditions F, there shall be no leakage at the dynamic seal of the sequence valve, and no oil dripping at the dynamic seal: m) Pressure resistance: Each pressure-bearing oil port shall withstand 1.5 times the maximum working pressure of the oil port, without external connection and parts damage.
n) Durability: Under rated working conditions, the sequence valve should be able to withstand a certain number of operations, and the valve should not be abnormally worn or damaged in other forms. The performance index should not drop by more than 10% of the specified value. 6.3 Assembly requirements
6.3.1 The sequence valve installation should be in accordance with the provisions of GB7935. 6.3.2 The internal deactivation requirements of the sequence valve should be in accordance with the provisions of JB/T7858.4 Appearance requirements
The appearance of the sequence valve shall comply with the provisions of GB/T7935. 7 Performance test methods
7.1 Test equipment
7.1.1 Factory test shall have a test bench that complies with the test circuit shown in Figure A.1 in Appendix 4: 7.1.? Type test shall have a test bench that complies with the test circuit shown in Figure A.2 in Appendix A: 7.1.3 Flow and pressure of oil source:
The flow rate of the valve shall be adjusted and shall be greater than the test flow of the valve under test. The pressure of the oil channel shall be able to exceed the nominal pressure of the valve under test by 20%~30% for a short time. 7.1.4 It is allowed to add elements to adjust pressure, flow heat or ensure the safe operation of the flow test system in a given basic technical circuit, but it should not affect the performance of the tested network.
7.1.5 The inner diameter of the pipe and the replacement joint connected to the tested chest should be consistent with the actual diameter of the tested valve. 7.1.6 The position of the monitoring point:
7.1.6.1 The inlet pressure measuring point should be set upstream of the disturbance source (such as the pressure source, the test head, etc.) and the test valve. The distance to the disturbance source should not be less than 1 (the pressure source is the diameter): the distance to the test valve should not be less than 54. 7.1.6.2 The outlet pressure point should be set at least 10 downstream of the tested valve. 7.1.6.3 When measuring according to Class C accuracy, the position of the pressure measuring point is allowed to be inconsistent with the above requirements, but the corresponding correction value should be given. 7.1.7 Pressure measurement 1.
7.1.7.1 The diameter of the pressure hole shall not be less than 1mm, and the diameter of the pressure hole shall not be less than 2 times of the pressure hole diameter. 7.1.72
The pressure hole line and the pipeline auxiliary line shall be straight: the intersection of the inner tube and the pressure hole shall be sharp and free of burrs. The inner diameter of the connecting pipe between the pressure point and the measuring instrument shall not be less than 3mm. 7.1.7.4
When the pressure point is connected to the measuring instrument, the air in the pipe shall be removed. 7.t.7.5
7.1.8 The material measurement point shall be set at least 15 upstream of the drum test inlet pressure measurement point. 7.1.9 The sampling point of the liquid should be in accordance with the provisions of GB/117489, and the oil condensate sampling point should be set in the test line or the test line to extract the oil. 7.2 Test conditions
7.2.1 Test medium
The test medium is general hydraulic oil.
7.2.1.2 Temperature of the test medium: Unless otherwise specified, the type test should be carried out at 50℃-2℃, and the test should be carried out at 50℃-4℃.
7.2.t.3 Viscosity of the test medium: The moving speed at 40r is 42mm/s~14m/s (special requirements are specified). 7.2.1:4 Flow cleanliness of test materials: The level of solid particle pollution removed by the test system should not be higher than the level specified in B/T14039-2002-19/16. 7.2.2 Steady state working conditions When the range of change of the average displayed value of the controlled quantity meets the requirements of Table 2, it is a steady state working condition. The measurement of test parameters should be recorded under steady state working conditions.
Table 2 Allowable variation of average displayed value of controlled parameter The maximum displayed value of controlled parameter corresponding to each measurement accuracy level, allowable range A
Note: Measurement accuracy level see 7.2.5.
Instantaneous engineering
23.1 The apparent volumetric stiffness of the test object and the relevant parts of the test circuit should ensure that the change rate of the inlet pressure of the test object is within the range of 00~800MPa/s.
Let: The inlet pressure change rate refers to the ratio of the inlet pressure change from 1% to 90% of the final pressure value and the corresponding time.
7.2.3.2 The relative distance between the step load and the test object can be determined by controlling the pressure gradient between them to limit the influence of oil leakage compressibility. The pressure gradient between them can be obtained by calculation. The calculated pressure gradient should be at least 10% of the measured inlet pressure gradient of the test valve. Pressure formula:
Where;
Steady-state flow rate set for the test valve 4:
Equivalent elastic modulus of the paint:
The nominal flow rate between the test valve 4 and the cascade loading valve (control valve 8 or solenoid valve-1) in the test circuit.
72.3.3 The action time of the cascade loading valve in the test circuit should not exceed 10% of the inlet pressure response time of the test valve 4, and the maximum should not exceed 10ms.
72.4 Test flow rate
7.2.4.1 When the specified rated flow rate of the test valve is less than or equal to 200L/min, the test flow rate is the rated flow rate. 7.2.4.2 When the specified cut-off test flow rate is 20K0T/min, the full test flow rate is 200L/min, but the working conditions must be special and the performance indicators of the tested equipment shall be based on meeting the working conditions. 7.2.4.3 Factory test is allowed to reduce the amount of sludge: but the corresponding reference limit value should be given to the performance index. 7.2.5 Measurement accuracy level
The measurement accuracy level is divided into A, B, and C. The type test should not be lower than B level, and the factory test should not be lower than C level. The allowable system error of the measurement system for each level shall comply with the provisions of Table 3. Table 3 Allowable system error of measurement system
Measurement reference
Gauge pressure 0.2MPa
Allowable system error H corresponding to each measurement accuracy level
7.3 Test items and test methods
7.3.1 Test items and test methods for sequence valves shall comply with the provisions of Table 5. 7.3.2 Type test
The type test items and test methods for pre-sequence test shall comply with the provisions of Table 5. Test items and test methods
Test pressure
Pressure resistance
Pressure resistance and output
Stability
Internal leakage
External leakage
Forward three-way loss
Reverse pressure loss
Test method
Each oil-resistant machine is connected with the pump box,
Apply the pressure test force to each pressure-bearing port 1.5 times the maximum working pressure of the oil port, the over-pressure is increased at a speed of 5 times the pressure resistance test pressure. After the test, the flow rate is adjusted to 15% higher than the upper limit of the adjustment range [only for safety reasons], and the flow rate through the test valve 4 is the test flow rate. The following tests are carried out respectively. The adjustment ends (or F wheels) of the two test parts are adjusted from fully loose to fully purple, and then from fully to fully inspected. The pressure gauge is used for 3.1. Remember the pressure drop and the pressure range, and pay attention to the pressure range. Adjust the pressure gauge 3-1 to the upper limit of the pressure regulation function, and measure the pressure end value in the pressure gauge 3-1. When testing the external control type, introduce the control oil from the outside and adapt the pressure applied to the test section 4. Drum test section 4 flow chart 2, make the test pressure range reach the upper limit, and make the flow rate through the test valve 4 be the test volume, and then adjust the flow rate again to make the pressure drop to 50% of the upper limit of the test range, and adjust 30% to measure the volume at the outlet of the test section 4. When testing the external control type, introduce the control oil from the outside to adjust the control force to 15% higher than the upper limit of the pressure regulating range of the sequential action of the test chamber 4, and at the same time complete the above-mentioned operation standards. Close the flow block 6, adjust the flow chamber 2 to the upper limit of the pressure regulating range of the two chambers of the test chamber, and measure the leakage at the oil leakage port of the test chamber 4 after 30s of adjustment. When testing the externally controlled test chamber, control oil must be introduced from the outside, and the pressure of the control oil must be adjusted to the upper limit of the pressure regulating range of the two chambers of the test chamber (for the sequential pressure drop, it is the upper limit of the pressure regulating range of the pressure measurement, and at the same time complete the above-mentioned operation
requirements, adjust the screw (or the pulley) of the test valve 4 to the full setting (for the sequential pressure drop, only the valve opening is fully opened), and make the valve plate passing through the test chamber 4 the test valve, and measure the pressure with pressure gauges 31 and 3-2, and the pressure difference is the positive pressure loss of the test chamber 4.
Change the direction of the drop, Make the flow rate through the tested network 4 in the reverse direction as the test flow, use pressure gauges 3-2 and 3-1 to measure the pressure, and the total pressure loss of the closed part is the reverse force loss of the tested valve 4.
JB/T10370-2D02
Test type
Instrument for one-way valve sequence
Network, balanced lubrication, one-way valve and valve shop
Back,
JB/T10370—2002
Warfare and fire prevention project
Steady-state force
Reliability
Action reliability
Density
Test items
Stability characteristics
Table 4 (loaded)
Test method
Adjust the overflow or lubrication 2 to the ratio The upper limit of the pressure regulating range of the test network 4 is 1 suction stone higher (only for installation), adjust the whole test network 4 to the upper limit of the pressure regulating range, and make the flow of the active test network 4 as the test flow, and conduct the following tests respectively
two-way flow valve 2, make the system gradually cut off the pressure, when the pressure drops to the corresponding closing pressure under the seat of the test valve 4, the construction of the test 4 is realized.
Adjustment model 2, from the beginning of the test flow through the system: new opening pressure, when the pressure rises to the corresponding opening pressure under the chain test 4: measure the flow through the test 4 and, when conducting external test tests, it is necessary to confirm that the external control is available, and the pressure of the control oil is 15% higher than the upper limit of the pressure regulating range of the test valve 4, and complete the above operations at the same time. The flow through the test object 4 is the test quantity. The test object 4 is set to the lower limit of the adjustment range (when the required pressure range is lower than the lower limit value F2.5MPa, then ask 1, the section is filled with 6, so that the test
inlet pressure is the nominal pressure, and it is kept for 3 minutes before adjusting. The system positive pressure is reduced to the lower setting pressure of the test object 4. The test object 4 should be able to connectwwW.bzxz.Net
(sealability
Place a clean paper under the pressure of the test valve 4 adjustment needle, and allow the oxygen to be collected in the whole device! During the whole test, there should be no oil dripping upwards. After the test, at each static seat, the pressure is on the water-receiving paper, and there should be no oil stains.
Table 5 Type test items and test methods
Press to show! Test requirements and test methods All test items: Test type
In reverse pressure range and force emergency qualitative test H: The pressure resistance should be measured within the pressure range. When the internal leakage is changed, the pressure of the selected test port is continuously lowered from the highest value of the adjustment ratio to the same value. During this period, several measuring points are set (the number of set points should be sufficient to measure the inlet pressure-internal leakage curve). The internal pressure of the test port is measured at the sent points, and the pressure-internal micro-full quality characteristic curve is drawn (see Figure A.3). When the air is in the external leakage or test, the pressure of the test port is raised from the service support to the public pressure, and several distances are set during this period. Measure the outflow of the micro-test valve 4 point by point, and draw the inflow-discharge full volume characteristic curve (Figure 441
In the non-reciprocal pressure loss test, make the flow through the whole test valve 4 gradually increase the test flow rate, during which several non-reciprocal pressure loss points are determined (the set measuring points are based on the inflow-discharge curve), measure the forward pressure loss of the test valve 4 point by point. And give the forward pressure characteristic curve (see Figure A.5: Test Item Month
Steady-state Characteristics
Capacity
Stock Specifications|| tt||Table 5 (continued)
Sour method
JB/T10370—2002
In the reverse pressure test, the reverse flow rate can be gradually increased from the test flow rate to the test flow rate base, and a total of several measuring points can be determined (the determined number of points should be used to describe the measured reverse flow rate curve), and the reverse loss of the test object can be measured point by point: and the reverse loss characteristic curve can be drawn as a simulated loss characteristic curve (see judgment.6) 1 In the equal pressure characteristic test, the test object is adjusted to the pressure adjustment range value (when the range lower value is 11MP, the test value is 1.5MP), the upper limit and the lower limit, and the flow rate through the test object is the test flow rate. Then change the system pressure, measure the inlet pressure of the test valve and the flow rate through the test valve 4 under the corresponding pressure, and then adjust the pressure to the value in Table 3-1. Then increase the flow rate through the test channel to above the dangerous flow rate, and measure the minimum set pressure in the test room 4. Then, test the flow rate to the minimum set pressure and obtain the performance of the test valve 4: see Figure 8! Set the flow valve 2-1 to 15% higher than the upper pressure range value of the test object (it plays a safety role: and make the test object return to the test value by step test, and then heat it up or install it in the groove 4. Make the pressure range from the lower limit value to the working limit value, from the upper limit value to the lower limit value, and set up two measuring points (the measuring points should be used to describe the pressure-adjustment torque characteristic line), use the small torque measurement to verify the adjustment of the test object during the adjustment process, and comprehensively control the pressure-adjustment torque characteristic line (see AH) The overflow of the test vessel 2-1 is to one of the two upper limit values of the pressure regulating range of the test vessel 4. (In the whole face, there is no oil flow method that is suitable for the flow range 2-1; adjust the test vessel 4 pressure range and also the upper limit. Manually adjust the throttle. The outlet pressure of the test vessel 4 is 1Ma lower than the upper limit value of the pressure regulating range. The flow rate you want to test is the test flow. Run the following tests respectively: full flow salt step change time load test limit reverse mountain mountain set pressure judgment response characteristic test 2-2, so that the control force can ensure the control of one-way lubrication. According to the requirements of the working condition 7.2.3.3, when the mountain volume 7-2 is set to the new original position, the pressure on the inlet of the test period 4 drops to the instantaneous state and shall not exceed 20% of the upper limit of the river section force. Then, the electromagnetic reversing reading 7-2 is switched to the oxygen storage position, so that the single-core use is closed, and the inlet of the piercing plan 4 produces a full-scale explosion state record 7.2.1.1 pressure version. Through the pressure sensors 3-1 and 3-2, only the pressure of the delivery port 4 is recorded, and the actual 4 is obtained. The pressure of the gate river is closed and the return time and the over-pressure rate (see Figure! "The special test
and its electrical connection to 7-1 and 7-3 should meet the transient conditions 7.2.1.3) Note that the sensor 3-132 only records the pressure and over-pressure process of the test company, and obtains the pressure adjustment rate of the test room 4 inlet and outlet adjustment: see medical A.11)
Xie Jie wave test 4 to Wen Yu Fan because of the lower limit (when the pressure reading is lower than the pressure limit value of 1.5Ma, Xie Dasheng 15P: upper limit value, and the wide flow through the eliminated 4 and the test flow. Use the Duo City more proposed to have a distance from the room once the test run 1m as the radius of the approximate sphere, two 6 side distribution of the military course by the position,
method to adjust the test 4 to the correct value, so that the flow through the two test 4 average test flow, with (1/32/3) [z] ... Only for one-way sequence, parallel bias, one-way lubrication and frequency sequence back pressure, only for original sequence back pressure valve, equal pressure under the upper limit value, only for stacked valve, JB/T10370—2002, 8 assembly and appearance inspection methods, the assembly and appearance inspection methods for sequence lubrication shall be in accordance with the provisions of Table 6. 6 assembly and appearance inspection methods, 9 inspection rules, inspection classification, inspection items, assembly throughput, appearance quality, product inspection, and type test inspection.
9.1.1 Factory inspection
Test method
Machine test method.
According to the provisions of .T7858,
after the date of introduction,
factory inspection refers to the various inspections that should be carried out before the product is delivered. The frequency and method of performance inspection shall be in accordance with the provisions of 7.3.1, the performance requirements shall comply with the provisions of 6.2, the assembly and appearance inspection methods shall be in accordance with the provisions of Section 8, and the quality shall meet the requirements of 6.3 and 6.4. 9.1.2 Type inspection
Type inspection means a comprehensive examination of product quality, that is, a comprehensive inspection is carried out according to the technical requirements specified in the standard. Type inspection is carried out for any of the following situations:
a) New products or old products are transferred to production trial strips for finalization and signing; b) Formal production level, if there are major changes in structure, materials, and processes, which may affect product performance; ) When the product is discontinued for a long time; ) When production is resumed; ) When there is a large difference between the factory inspection result and the last type inspection result; ) When the national quality inspection supervisor proposes a type inspection requirement. The items and methods of performance inspection shall comply with the provisions of 7.3.2, and all requirements shall comply with the provisions of 6.2: The inspection of assembly and appearance shall comply with the provisions of Chapter 1, and the requirements of 6.3 and 6.4 shall comply with the requirements of 92 Sampling
The sampling plan for product inspection shall comply with the provisions of GB/T2828. Note: Quality inspection sampling is in accordance with relevant regulations. 9.2.1 Factory inspection sampling
a) Qualified quality level (AQL value): 2.56) Sampling plan type: Regular inspection One-time sampling plan c) Shuttle case level: General inspection level II: Endurance test sample size is D.3%, but not less than two sets, 922 Type inspection sampling
a) Qualified quality level (AQL value): 2.5 [65] female) Sampling case type: Regular inspection One-time sampling plan: 】 Sample size: 5 sets [2 sets].
pieces, the values in square brackets are applicable to durability tests. 9.2.3 Internal cleanliness inspection sampling
a) Qualified quality level: (AQL value): 2.5: Sampling case type: Regular inspection One-time sampling plan: by
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