CN219242353U

CN219242353U - Hydraulic system for reliability test of proportional flow valve

Info

Publication number: CN219242353U
Application number: CN202223449317.2U
Authority: CN
Inventors: 陈逸嘉; 林广�; 金光俊; 赵静一
Original assignee: Youweili Hydraulic Technology Co ltd
Current assignee: Youweili Hydraulic Technology Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-06-23
Anticipated expiration: 2032-12-22

Abstract

The utility model provides a hydraulic system for a proportional flow valve reliability test, which relates to the technical field of hydraulic systems and comprises a pump station system, a multi-channel composite oil source control valve bank, a first multi-channel parallel detection system, a second multi-channel parallel detection system, a multi-channel state control valve bank, a static test assembly and a dynamic test assembly, wherein a first tested valve, a second tested valve, a third tested valve and a fourth tested valve are arranged between the multi-channel composite oil source control valve bank and the multi-channel state control valve bank, P ports of the four tested valves are respectively communicated with oil outlets of the multi-channel composite oil source control valve bank, A ports and B ports are respectively communicated with oil inlets of the multi-channel state control valve bank in a one-to-one correspondence manner, T ports of the first tested valve and the second tested valve are communicated with the first multi-channel parallel detection system, and T ports of the third tested valve and the fourth tested valve are communicated with the second multi-channel parallel detection system. The utility model can detect the static characteristic and the dynamic characteristic of four tested valves at the same time, and improves the testing efficiency.

Description

Hydraulic system for reliability test of proportional flow valve

Technical Field

The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic system for a reliability test of a proportional flow valve.

Background

The proportional flow valve is used as an important element for controlling the accuracy and the speed of an executive element in a hydraulic system, and the operation reliability of the proportional flow valve is one of important indexes for evaluating the performance of the proportional flow valve. The design requirement of a single proportional flow valve test system loop is standardized in the hydraulic industry test standard, and the proportional flow valve detection can be divided into static characteristic detection and dynamic characteristic detection so as to represent the characteristic level of the proportional flow valve. The single test method cannot meet the working condition requirement when the reliability of the comparative example flow valve is continuously simulated, the number of test samples in unit time is limited, and a plurality of test systems are needed when a plurality of proportional flow valve elements are tested simultaneously, so that resource waste is easily caused. Therefore, a hydraulic system for the reliability of the proportional flow valve and a test method thereof are required to be established, the test requirement of multiple sample numbers is met, and the resource waste of the test system is avoided.

Disclosure of Invention

The utility model aims to provide a hydraulic system for a reliability test of a proportional flow valve, which can simultaneously carry out static characteristic detection, dynamic characteristic detection and reliability test on four proportional flow valves, remarkably improves the switching control of the hydraulic system during different characteristic detection, realizes the test of a simulation working condition, increases the number of test samples, greatly reduces the test switching time, improves the test efficiency and avoids resource waste.

The technical aim of the utility model is realized by the following technical scheme:

the hydraulic system for the reliability test of the proportional flow valve comprises a pump station system, a multi-path composite oil source control valve bank, a first multi-path parallel detection system, a second multi-path parallel detection system, a multi-path state control valve bank, a static test assembly and a dynamic test assembly, wherein a first tested valve, a second tested valve, a third tested valve and a fourth tested valve are arranged between the multi-path composite oil source control valve bank and the multi-path state control valve bank;

the pump station system comprises an oil tank, four first plunger pumps, four second plunger pumps, four third plunger pumps and four fourth plunger pumps which are connected in parallel and have different flow ranges, oil inlets of the first plunger pumps, the second plunger pumps, the third plunger pumps and the fourth plunger pumps are respectively communicated with the oil tank, oil outlets are respectively connected with an oil inlet one-way valve, and an unloading valve is connected between the oil outlet of each oil inlet one-way valve and the oil tank;

the multi-path composite oil source control valve bank is provided with oil inlets DA, DB, DC, DD which are respectively communicated with the four oil inlet one-way valves in a corresponding manner and oil outlets DE, DF, DG, DH which are respectively corresponding to the four oil inlets in a one-to-one manner, and the oil outlets DE, DF, DG, DH are respectively connected with an oil outlet pressure sensor; a first oil source electromagnetic ball valve is arranged between DA and DE, a second oil source electromagnetic ball valve is arranged between DB and DF, a third oil source electromagnetic ball valve is arranged between DC and DG, and a fourth oil source electromagnetic ball valve is arranged between DD and DH; a fifth oil source electromagnetic ball valve is arranged between the DA and the DB, a sixth oil source electromagnetic ball valve is arranged between the DB and the DE, a seventh oil source electromagnetic ball valve is arranged between the DB and the DC, an eighth oil source electromagnetic ball valve is arranged between the DC and the DF, a ninth oil source electromagnetic ball valve is arranged between the DC and the DD, and a tenth oil source electromagnetic ball valve is arranged between the DD and the DG;

Eight oil inlets A1, B1, A2, B2, A3, B3, A4 and B4 and oil outlets C1, D1, C2, D2, C3, D3, C4 and D4 which are in one-to-one correspondence with the eight oil inlets are arranged on the multi-way state control valve bank, a first electromagnetic ball valve is arranged between A1 and C1, a second electromagnetic ball valve is arranged between B1 and D1, a third electromagnetic ball valve is arranged between A2 and C2, a fourth electromagnetic ball valve is arranged between B2 and D2, a fifth electromagnetic ball valve is arranged between A3 and C3, a sixth electromagnetic ball valve is arranged between B3 and D3, a seventh electromagnetic ball valve is arranged between A4 and C4, and an eighth electromagnetic ball valve is arranged between B4 and D4;

a ninth electromagnetic ball valve is arranged between A1 and C2, a tenth electromagnetic ball valve is arranged between B1 and D2, an eleventh electromagnetic ball valve is arranged between A2 and C1, and a twelfth electromagnetic ball valve and a thirteenth electromagnetic ball valve which are connected in series are arranged between B2 and D1; a fourteenth electromagnetic ball valve is arranged between A3 and C4, a fifteenth electromagnetic ball valve is arranged between B3 and D4, a sixteenth electromagnetic ball valve is arranged between A4 and C3, and a seventeenth electromagnetic ball valve and an eighteenth electromagnetic ball valve which are connected in series are arranged between B4 and D3;

the static test assembly comprises a first static double-rod-outlet oil cylinder corresponding to oil outlets C1 and D1 of the multi-path state control valve bank and a second static double-rod-outlet oil cylinder corresponding to oil outlets C3 and D3, wherein the ports A of the first static double-rod-outlet oil cylinder and the second static double-rod-outlet oil cylinder are respectively communicated with the oil outlets C1 and C3 of the multi-path state control valve bank, and the ports B of the first static double-rod-outlet oil cylinder and the second static double-rod-outlet oil cylinder are respectively communicated with the oil outlets D1 and D3 of the multi-path state control valve bank; the first static double-rod-outlet oil cylinder and the second static double-rod-outlet oil cylinder are connected with a static displacement sensor, a static force sensor and two static pressure sensors;

The dynamic test assembly comprises a first dynamic double-rod-outlet oil cylinder corresponding to oil outlets C2 and D2 of the multi-path state control valve bank and a second dynamic double-rod-outlet oil cylinder corresponding to oil outlets C4 and D4, wherein the ports A of the first dynamic double-rod-outlet oil cylinder and the second dynamic double-rod-outlet oil cylinder are respectively communicated with the oil outlets C2 and C4 of the multi-path state control valve bank, and the ports B of the first dynamic double-rod-outlet oil cylinder and the second dynamic double-rod-outlet oil cylinder are respectively communicated with the oil outlets D2 and D4 of the multi-path state control valve bank; the first dynamic double-rod-outlet oil cylinder and the second dynamic double-rod-outlet oil cylinder are connected with a dynamic displacement sensor, a dynamic speed sensor and two dynamic pressure sensors;

the P ports of the first tested valve, the second tested valve, the third tested valve and the fourth tested valve are respectively communicated with the oil outlets DE, DF, DG, DH of the multi-path composite oil source control valve bank in one-to-one correspondence, the A port is respectively communicated with the oil inlets A1, A2, A3 and A4 of the multi-path state control valve bank in one-to-one correspondence, and the B port is respectively communicated with the oil inlets B1, B2, B3 and B4 of the multi-path state control valve bank in one-to-one correspondence; the T ports of the first tested valve and the second tested valve are communicated with the first multi-path parallel detection system, and the T ports of the third tested valve and the fourth tested valve are communicated with the second multi-path parallel detection system.

Further, the first multipath parallel detection system comprises a first flowmeter and a second flowmeter which are connected in parallel, wherein two ends of the first flowmeter are respectively connected with a first flow electromagnetic ball valve and a second flow electromagnetic ball valve, and two ends of the second flowmeter are respectively connected with a third flow electromagnetic ball valve and a fourth flow electromagnetic ball valve; the first flow electromagnetic ball valve and the third flow electromagnetic ball valve are connected in parallel and then communicated with the T port of the first tested valve, the second flow electromagnetic ball valve is connected in parallel with the fourth flow electromagnetic ball valve and then communicated with the T port of the second tested valve; the first flow electromagnetic ball valve and the third flow electromagnetic ball valve are connected in parallel and then are also connected with a first oil outlet electromagnetic ball valve, the second flow electromagnetic ball valve and the fourth flow electromagnetic ball valve are connected in parallel and then are also connected with a second oil outlet electromagnetic ball valve, oil outlets of the first oil outlet electromagnetic ball valve and the second oil outlet electromagnetic ball valve are connected with an oil tank, an oil inlet of the first oil outlet electromagnetic ball valve is directly connected with a T-port of a first tested valve, and an oil inlet of the second oil outlet electromagnetic ball valve is directly connected with a T-port of a second tested valve;

the second multipath parallel detection system comprises a third flowmeter and a fourth flowmeter which are connected in parallel, wherein two ends of the third flowmeter are respectively connected with a fifth flow electromagnetic ball valve and a sixth flow electromagnetic ball valve, and two ends of the fourth flowmeter are respectively connected with a seventh flow electromagnetic ball valve and an eighth flow electromagnetic ball valve; the fifth flow electromagnetic ball valve and the seventh flow electromagnetic ball valve are connected in parallel and then communicated with the T port of the third tested valve, and the sixth flow electromagnetic ball valve is connected in parallel with the eighth flow electromagnetic ball valve and then communicated with the T port of the fourth tested valve; the fifth flow electromagnetic ball valve and the seventh flow electromagnetic ball valve are connected in parallel and then are further connected with a third oil outlet electromagnetic ball valve, the sixth flow electromagnetic ball valve and the eighth flow electromagnetic ball valve are connected in parallel and then are further connected with a fourth oil outlet electromagnetic ball valve, oil outlets of the third oil outlet electromagnetic ball valve and the fourth oil outlet electromagnetic ball valve are connected with an oil tank, an oil inlet of the third oil outlet electromagnetic ball valve is directly connected with a T-port of a third tested valve, and an oil inlet of the fourth oil outlet electromagnetic ball valve is directly connected with a T-port of a fourth tested valve; and the T ports of the first measured valve, the second measured valve, the third measured valve and the fourth measured valve are respectively connected with a flow pressure sensor.

The digital hydraulic energy storage system comprises three parallel energy storages, wherein a digital valve bank is connected after the three energy storages are connected in parallel, and an energy storage electromagnetic ball valve is arranged between each energy storage and the digital valve bank; the digital valve group is sequentially connected with an energy storage pressure sensor and a fifth flowmeter, P ports of the first measured valve, the second measured valve, the third measured valve and the fourth measured valve are respectively communicated with the fifth flowmeter, and an oil supplementing electromagnetic ball valve is arranged between each P port and the fifth flowmeter.

The leakage detection system comprises a small-flow electromagnetic ball valve, a large-flow electromagnetic ball valve and a bypass electromagnetic valve which are arranged in parallel, wherein an electromagnetic main valve is connected after the small-flow electromagnetic ball valve, the large-flow electromagnetic ball valve and the bypass electromagnetic valve are connected in parallel, Y ports of the first measured valve, the second measured valve, the third measured valve and the fourth measured valve are all connected with the electromagnetic main valve, and a leakage electromagnetic ball valve is respectively arranged between each Y port and the electromagnetic main valve; the small-flow electromagnetic ball valve is connected with a measuring cup, the large-flow electromagnetic ball valve is sequentially connected with a leakage filter and a sixth flowmeter, and the sixth flowmeter and the bypass electromagnetic valve are connected with an oil tank.

Further, the oil outlets DE, DF, DG, DH of the multi-path composite oil source control valve group are also respectively connected with a first pressure reducing valve, a second pressure reducing valve, a third pressure reducing valve and a fourth pressure reducing valve which are in one-to-one correspondence with the multi-path composite oil source control valve group, and pressure reducing electromagnetic ball valves are respectively arranged between the first pressure reducing valve, the second pressure reducing valve, the third pressure reducing valve and the fourth pressure reducing valve and the corresponding oil outlets DE, DF, DG, DH; the X ports of the first tested valve, the second tested valve, the third tested valve and the fourth tested valve are respectively provided with a control electromagnetic ball valve, and the four control electromagnetic ball valves are connected in parallel and then are respectively connected with the first pressure reducing valve, the second pressure reducing valve, the third pressure reducing valve and the fourth pressure reducing valve; the first switching electromagnetic ball valve is arranged between the first pressure reducing valve oil inlet and the second pressure reducing valve oil inlet, and the second switching electromagnetic ball valve is arranged between the third pressure reducing valve oil inlet and the fourth pressure reducing valve oil inlet.

Further, an oil inlet filter is respectively arranged between each oil inlet check valve and an oil inlet DA, DB, DC, DD corresponding to each oil inlet check valve in a one-to-one mode on the multi-channel composite oil source control valve group, an oil outlet of each oil inlet check valve is further connected with a buffer energy accumulator, the oil inlet filter and the unloading valve which are connected with each oil inlet check valve are arranged in parallel, and an oil inlet of each oil inlet check valve is connected with an oil inlet pressure sensor.

Further, a nineteenth electromagnetic ball valve is further arranged between the oil inlet B1 and the oil outlet D2 of the multi-way state control valve group, and the nineteenth electromagnetic ball valve and the tenth electromagnetic ball valve are arranged in parallel; and a twentieth electromagnetic ball valve is further arranged between the oil inlet B3 and the oil outlet D4, and the twentieth electromagnetic ball valve and the fifteenth electromagnetic ball valve are arranged in parallel.

Further, the oil tank is also connected with a heating device, an air filter, a temperature detector, an oil cooling unit and an oil return filter, wherein the heating device is provided with a plurality of oil tanks and is positioned in the oil tank, an oil inlet and an oil outlet of the oil cooling unit are both connected with the oil tank, an oil inlet of the oil return filter is connected with an oil receiving groove, and the oil outlet is connected with the oil tank.

In summary, the utility model has the following beneficial effects:

1. the pump station system is formed by the first plunger pump, the second plunger pump, the third plunger pump and the fourth plunger pump with different flow pressure specifications, so that the first tested valve, the second tested valve, the third tested valve and the fourth tested valve with different flow specifications can be tested simultaneously, the sample types of the tested valves are increased, and the test efficiency is improved;

2. continuous operation data detection under the simulated working conditions is realized through a multi-path composite oil source control valve bank, a first multi-path parallel detection system, a second multi-path parallel detection system and a multi-path state control valve bank combined control loop, so that the number of test samples is increased, and the test switching time is saved;

3. The digital hydraulic energy storage system is used for realizing control output of specific flow and pressure and short-time high-flow characteristic test;

4. and switching the tested valve between the static test system and the dynamic test system through the multi-path state control valve group, and continuously performing a reliability test on the first tested valve, the second tested valve, the third tested valve and the fourth tested valve.

Drawings

Fig. 1 is a schematic diagram of a hydraulic system for a proportional flow valve reliability test.

In the figure, 1, a pump station system; 11. an oil tank; 12. a heating device; 13. an air filter; 14. a temperature detector; 15. an oil cooling unit; 16. an oil return filter; 21. a first plunger pump; 22. a second plunger pump; 23. a third plunger pump; 24. a fourth plunger pump; 25. an oil inlet one-way valve; 26. a feed oil pressure sensor; 27. an unloading valve; 28. an oil inlet filter; 29. a buffer accumulator; 3. multiple paths of compound oil source control valve groups; 30. a discharge oil pressure sensor; 31. a first oil source electromagnetic ball valve; 32. the second oil source electromagnetic ball valve; 33. a third oil source electromagnetic ball valve; 34. a fourth oil source electromagnetic ball valve; 35. a fifth oil source electromagnetic ball valve; 36. a sixth oil source electromagnetic ball valve; 37. seventh oil source electromagnetic ball valve; 38. an eighth oil source electromagnetic ball valve; 39. a ninth oil source electromagnetic ball valve; 310. a tenth oil source electromagnetic ball valve; 4. controlling an electromagnetic ball valve; 41. a first pressure reducing valve; 42. a second pressure reducing valve; 43. a third pressure reducing valve; 44. a fourth pressure reducing valve; 45. a pressure reducing electromagnetic ball valve; 46. a first switching solenoid valve; 47. a second switching solenoid valve; 5. a first multi-path parallel detection system; 51. a first flowmeter; 52. a second flowmeter; 53. a first flow solenoid valve; 54. a second flow solenoid valve; 55. a third flow electromagnetic ball valve; 56. a fourth flow electromagnetic ball valve; 57. a first oil outlet electromagnetic ball valve; 58. the second oil outlet electromagnetic ball valve; 6. the second multipath parallel detection system; 61. a third flowmeter; 62. a fourth flow meter; 63. a fifth flow electromagnetic ball valve; 64. a sixth flow electromagnetic ball valve; 65. a seventh flow electromagnetic ball valve; 66. an eighth flow electromagnetic ball valve; 67. a third oil outlet electromagnetic ball valve; 68. a fourth oil outlet electromagnetic ball valve; 69. a flow pressure sensor; 7. a digital hydraulic energy storage system; 71. an accumulator; 72. a digital valve group; 73. an energy storage pressure sensor; 74. a fifth flowmeter; 75. oil supplementing electromagnetic ball valve; 76. energy storage electromagnetic ball valve; 8. a leak detection system; 81. a small flow electromagnetic ball valve; 82. high-flow electromagnetic ball valve; 83. a bypass solenoid valve; 84. an electromagnetic main valve; 85. a leaking electromagnetic ball valve; 86. a measuring cup; 87. a leak filter; 88. a sixth flow meter; 9. a multi-path state control valve group; 91. a first electromagnetic ball valve; 92. a second electromagnetic ball valve; 93. a third electromagnetic ball valve; 94. a fourth electromagnetic ball valve; 95. a fifth electromagnetic ball valve; 96. a sixth electromagnetic ball valve; 97. a seventh electromagnetic ball valve; 98. an eighth electromagnetic ball valve; 99. a ninth electromagnetic ball valve; 910. a tenth electromagnetic ball valve; 911. an eleventh electromagnetic ball valve; 912. a twelfth electromagnetic ball valve; 913. thirteenth electromagnetic ball valve; 914. a fourteenth electromagnetic ball valve; 915. a fifteenth electromagnetic ball valve; 916. sixteenth electromagnetic ball valve; 917. seventeenth electromagnetic ball valve; 918. an eighteenth electromagnetic ball valve; 919. nineteenth electromagnetic ball valve; 920. a twentieth solenoid valve; 01. a first valve under test; 02. the second valve to be tested; 03. a third valve under test; 04. a fourth valve under test; 05. a first static double-rod oil cylinder; 051. a static displacement sensor; 052. a static force sensor; 053. a static pressure sensor; 06. a second static double-rod oil cylinder; 07. a first dynamic double-rod oil cylinder; 071. a dynamic displacement sensor; 072. a dynamic speed sensor; 073. a dynamic pressure sensor; 08. and a second dynamic double-rod oil cylinder.

Detailed Description

The utility model will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The hydraulic system for the reliability test of the proportional flow valve is shown in fig. 1, and comprises a pump station system 1, a multi-path composite oil source control valve bank 3, a first multi-path parallel detection system 5, a second multi-path parallel detection system 6, a digital hydraulic energy storage system 7, a leakage detection system 8, a multi-path state control valve bank 9, a static test assembly and a dynamic test assembly, wherein a first tested valve 01, a second tested valve 02, a third tested valve 03 and a fourth tested valve 04 are arranged between the multi-path composite oil source control valve bank 3 and the multi-path state control valve bank 9. The four tested valves can be three-way proportional flow valves with specifications of DN6, DN10, DN25, DN32, DN40, DN50, DN63 and the like.

As shown in fig. 1, the pump station system 1 includes an oil tank 11 and first, second, third and fourth plunger pumps 21, 22, 23 and 24, and the first, second, third and fourth plunger pumps 21, 22, 23 and 24 are disposed in parallel and all have oil inlets communicating with the oil tank 11. In the embodiment, ISOVG46 oil is used in the oil tank 11, and the oil temperature change range is 47-57 ℃ when the viscosity is in the range of 32+/-8 mm < 2 >/s. Wherein, be equipped with a plurality of heating device 12 in the oil tank 11 and oil tank 11 is connected with oil cooling unit 15, and oil inlet and the oil-out of oil cooling unit 15 all are connected with oil tank 11, and oil tank 11 still is connected with heating device 12 and oil cooling unit 15 complex temperature detection meter 14, utilizes temperature detection meter 14, heating device 12 and oil cooling unit 15 to control the fluid temperature range in the oil tank 11 at 50 + -6 ℃. In addition, the oil tank 11 is also connected with an air filter 13 and an oil return filter 16 for cleaning oil, an oil inlet of the oil return filter 16 is connected with an oil receiving groove and an oil return pipeline, an oil outlet is connected with the oil tank 11, the oil return filter 16 is utilized for filtering the oil circulating in the hydraulic system, and redundant oil on the test platform can be poured into the oil receiving groove and then is cleaned by the oil return filter 16. The basic structure and operation principle of the heating device 12, the air filter 13, the thermometer 14, the oil cooling unit 15, the oil return filter 16, and the like in this embodiment are the same as those in the prior art.

As shown in fig. 1, the flow rates and the pressure ranges of the first plunger pump 21, the second plunger pump 22, the third plunger pump 23, and the fourth plunger pump 24 are different, and each of the first plunger pump 21, the second plunger pump 22, the third plunger pump 23, and the fourth plunger pump 24 is correspondingly connected with a variable speed motor. Wherein, the flow range of the first plunger pump 21 is 4L/min-30L/min, the flow range of the second plunger pump 22 is 15L/min-100L/min, the flow range of the third plunger pump 23 is 20L/min-150L/min, the flow range of the fourth plunger pump 24 is 30L/min-250L/min, the pressure ranges of the first plunger pump 21, the second plunger pump 22 and the third plunger pump 23 are all 0-31.5 Mpa, and the pressure range of the fourth plunger pump 24 is 0-25 Mpa.

As shown in fig. 1, oil outlets of the first plunger pump 21, the second plunger pump 22, the third plunger pump 23 and the fourth plunger pump 24 are all connected with an oil inlet check valve 25, and an oil inlet pressure sensor 26 is arranged between the first plunger pump 21, the second plunger pump 22, the third plunger pump 23 and the fourth plunger pump 24 and the corresponding oil inlet check valve 25, and the oil inlet check valve 25 is used for preventing mutual back punching among the four plunger pumps. The oil outlet of each oil inlet one-way valve 25 is connected with a buffer accumulator 29, an oil inlet filter 28 and an unloading valve 27 which are mutually connected in parallel, one end of the unloading valve 27, which is far away from the corresponding oil inlet one-way valve 25, is communicated with the oil tank 11, the outlet pressure of the corresponding plunger pump is regulated by the unloading valve 27, the oil inlet filter 28 ensures that the oil of the hydraulic system is clean, and the buffer accumulator 29 ensures that the oil inlet pressure is stable.

As shown in fig. 1, four oil inlets DA, DB, DC, DD and four oil outlets DE, DF, DG, DH which are communicated with the oil inlets in a one-to-one correspondence are arranged on the multi-path composite oil source control valve group 3, the four oil inlets DA, DB, DC, DD are respectively communicated with the oil outlets of the four oil inlet one-way valves 25 in a one-to-one correspondence through corresponding oil inlet filters 28, the four oil outlets DE, DF, DG, DH are respectively connected with oil outlet pressure sensors 30 which are in one-to-one correspondence with the oil outlets, and the P ports of the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 are respectively communicated with the oil outlets DE, DF, DG, DH of the multi-path composite oil source control valve group 3 in a one-to-one correspondence. The four oil inlets DA, DB, DC, DD and the four oil outlets DE, DF, DG, DH are communicated through ten oil source electromagnetic ball valves with high frequency response, and various oil paths are controlled through the combination of the oil source electromagnetic ball valves, so that the first plunger pump 21, the second plunger pump 22, the third plunger pump 23 and the fourth plunger pump 24 can supply oil independently or in a combined mode.

As shown in fig. 1, specifically: a first oil source electromagnetic ball valve 31 is arranged between DA and DE, a second oil source electromagnetic ball valve 32 is arranged between DB and DF, a third oil source electromagnetic ball valve 33 is arranged between DC and DG, and a fourth oil source electromagnetic ball valve 34 is arranged between DD and DH; a fifth oil source electromagnetic ball valve 35 is arranged between DA and DB, a sixth oil source electromagnetic ball valve 36 is arranged between DB and DE, a seventh oil source electromagnetic ball valve 37 is arranged between DB and DF, an eighth oil source electromagnetic ball valve 38 is arranged between DC and DF, a ninth oil source electromagnetic ball valve 39 is arranged between DC and DD, and a tenth oil source electromagnetic ball valve 310 is arranged between DD and DG. The first plunger pump 21 is connected with the DA port, the second plunger pump 22 is connected with the DB port, the third plunger pump 23 is connected with the DC port, and the fourth plunger pump 24 is connected with the DD port; the P port of the first tested valve 01 is connected with DE, the P port of the second tested valve 02 is connected with DF, the P port of the third tested valve 03 is connected with DG, and the P port of the fourth tested valve 04 is connected with DH.

As shown in fig. 1, when only the first oil source electromagnetic ball valve 31, the second oil source electromagnetic ball valve 32, the third oil source electromagnetic ball valve 33 and the fourth oil source electromagnetic ball valve 34 are opened and the other oil source electromagnetic ball valves are closed, the four plunger pumps supply oil for the four valves to be tested respectively, namely, the first plunger pump 21 supplies oil for the first valve to be tested 01, the second plunger pump 22 supplies oil for the second valve to be tested 02, the third plunger pump 23 supplies oil for the third valve to be tested 03, and the fourth plunger pump 24 supplies oil for the fourth valve to be tested 04. When the first oil source electromagnetic ball valve 31 fails, the second oil source electromagnetic ball valve 32 can be closed, the fifth oil source electromagnetic ball valve 35 and the sixth oil source electromagnetic ball valve 36 can be opened, and the first plunger pump 21 supplies oil to the first tested valve 01 through DA, DB and DE. Other plunger pumps are similar.

As shown in fig. 1, in addition to the independent oil supply, a plurality of plunger pumps may be used for oil supply, for example, the first plunger pump 21 and the second plunger pump 22 may be used for oil supply, the second oil source electromagnetic ball valve 32 and the fifth oil source electromagnetic ball valve 35 may be closed, the first oil source electromagnetic ball valve 31 and the sixth oil source electromagnetic ball valve 36 may be opened, and the first plunger pump 21 and the second plunger pump 22 may be combined to supply oil to the first tested valve 01. Similarly, the first oil source electromagnetic ball valve 31 and the sixth oil source electromagnetic ball valve 36 can be closed, the second oil source electromagnetic ball valve 32 and the fifth oil source electromagnetic ball valve 35 can be opened, and the first plunger pump 21 and the second plunger pump 22 are combined to supply oil to the second tested valve 02. And similarly, the corresponding oil source electromagnetic ball valve can be controlled to be opened and closed, so that oil supply of two plunger pumps or three plunger pump combinations is realized. Other plunger pumps are similar.

In addition, as shown in fig. 1, the ports P of the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 are all also communicated with the digital hydraulic energy storage system 7, and the digital hydraulic energy storage system 7 can supply oil to the four tested valves independently or in combination with four plunger pumps of the pump station system 1 to control the input pressure and flow. In the embodiment, the digital hydraulic energy storage system 7 comprises three energy storages 71 connected in parallel, the three energy storages 71 are connected in parallel and then are connected with a digital valve group 72, and an energy storage electromagnetic ball valve 76 is arranged between each energy storage 71 and the digital valve group 72; the digital valve group 72 is sequentially connected with an energy storage pressure sensor 73 and a fifth flowmeter 74, P ports of the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 are respectively communicated with the fifth flowmeter 74, and an oil supplementing electromagnetic ball valve 75 is arranged between each P port and the fifth flowmeter 74.

As shown in fig. 1, in the present embodiment, the first multi-path parallel detection system 5 includes two parallel first flow meters 51 and second flow meters 52, two ends of the first flow meter 51 are respectively connected with a first flow electromagnetic ball valve 53 and a second flow electromagnetic ball valve 54, and two ends of the second flow meter 52 are respectively connected with a third flow electromagnetic ball valve 55 and a fourth flow electromagnetic ball valve 56; the first flow electromagnetic ball valve 53 and the third flow electromagnetic ball valve 55 are connected in parallel and then communicated with the T port of the first tested valve 01, the second flow electromagnetic ball valve 54 is connected in parallel with the fourth flow electromagnetic ball valve 56 and then communicated with the T port of the second tested valve 02 after being connected in parallel. The first flow electromagnetic ball valve 53 and the third flow electromagnetic ball valve 55 are connected in parallel and then are further connected with a first oil outlet electromagnetic ball valve 57, the second flow electromagnetic ball valve 54 and the fourth flow electromagnetic ball valve 56 are connected in parallel and then are further connected with a second oil outlet electromagnetic ball valve 58, oil outlets of the first oil outlet electromagnetic ball valve 57 and the second oil outlet electromagnetic ball valve 58 are connected with the oil tank 11, an oil inlet of the first oil outlet electromagnetic ball valve 57 is directly communicated with a first port 01T of a tested valve, and an oil outlet of the second oil outlet electromagnetic ball valve 58 is directly communicated with a second port 02T of the tested valve.

As shown in fig. 1, three oil paths for oil return of the first tested valve 01T port can be selected: firstly, the oil returns to the oil tank 11 directly through the first oil outlet electromagnetic ball valve 57, secondly, the oil returns to the oil tank 11 through the first flow electromagnetic ball valve 53, the first flow electromagnetic ball valve 51, the second flow electromagnetic ball valve 54 and the second oil outlet electromagnetic ball valve 58, and thirdly, the oil returns to the oil tank 11 through the third flow electromagnetic ball valve 55, the second flow electromagnetic ball valve 52, the fourth flow electromagnetic ball valve 56 and the second oil outlet electromagnetic ball valve 58. Similarly, three oil paths are also selectable for oil return of the second tested valve 02T, namely, the oil returns to the oil tank 11 directly through the second oil outlet electromagnetic ball valve 58, the oil returns to the oil tank 11 through the fourth flow electromagnetic ball valve 56, the second flow meter 52, the third flow electromagnetic ball valve 55 and the first oil outlet electromagnetic ball valve 57, and the oil returns to the oil tank 11 through the second flow electromagnetic ball valve 54, the first flow meter 51, the first flow electromagnetic ball valve 53 and the first oil outlet electromagnetic ball valve 57.

In a normal state, the first measured valve 01 works corresponding to the first flowmeter 51, the second measured valve 02 works corresponding to the second flowmeter 52, and the flow ranges of the first measured valve 01 and the second measured valve 02 are tested. Of course, the second flowmeter 52 may be switched to be used in combination with the first valve 01 to be measured and the first flowmeter 51 may be switched to be used in combination with the second valve 02 to be measured according to the flow ranges of the first valve 01 to be measured and the second valve 02 to be measured. In addition, the first flowmeter 51 and the second flowmeter 52 may be mutually standby, the second flowmeter 52 ensuring normal testing of the first valve under test 01 when the first flowmeter 51 fails, and the first flowmeter 51 ensuring normal testing of the second valve under test 02 when the second flowmeter 52 fails.

As shown in fig. 1, the second multi-path parallel detection system 6 comprises two third flow meters 61 and a fourth flow meter 62 which are connected in parallel, wherein two ends of the third flow meter 61 are respectively connected with a fifth flow electromagnetic ball valve 63 and a sixth flow electromagnetic ball valve 64, and two ends of the fourth flow meter 62 are respectively connected with a seventh flow electromagnetic ball valve 65 and an eighth flow electromagnetic ball valve 66; the fifth flow electromagnetic ball valve 63 and the seventh flow electromagnetic ball valve 65 are connected in parallel and then communicated with the T port of the third tested valve 03, and the sixth flow electromagnetic ball valve 64 is connected in parallel with the eighth flow electromagnetic ball valve 66 and then communicated with the T port of the fourth tested valve 04. The fifth flow electromagnetic ball valve 63 and the seventh flow electromagnetic ball valve 65 are connected in parallel and then are further connected with a third oil outlet electromagnetic ball valve 67, the sixth flow electromagnetic ball valve 64 is connected in parallel with the eighth flow electromagnetic ball valve 66 and then is connected with a fourth oil outlet electromagnetic ball valve 68, oil outlets of the third oil outlet electromagnetic ball valve 67 and the fourth oil outlet electromagnetic ball valve 68 are connected with the oil tank 11, an oil inlet of the third oil outlet electromagnetic ball valve 67 is communicated with a T port of a third tested valve 03, and an oil inlet of the fourth oil outlet electromagnetic ball valve 68 is communicated with a T port of a fourth tested valve 04.

As shown in fig. 1, the working principle of the second multi-path parallel detection system 6 matched with the third tested valve 03 and the fourth tested valve 04 to detect the flow is the same as the working principle of the first multi-path parallel detection system 5 matched with the first tested valve 01 and the second tested valve 02 to detect the flow, and redundant description is omitted. In the present embodiment, the measurement ranges of the first flow meter 51 and the third flow meter 61 are 0.6L/min to 160L/min, the measurement ranges of the second flow meter 52 and the fourth flow meter 62 are 1L/min to 300L/min, and the T ports of the first measured valve 01, the second measured valve 02, the third measured valve 03 and the fourth measured valve 04 are respectively connected with a flow pressure sensor 69.

As shown in fig. 1, eight oil inlets A1, B1, A2, B2, A3, B3, A4, B4 and eight oil outlets C1, D1, C2, D2, C3, D3, C4, D4 which are in one-to-one correspondence with the oil inlets are arranged on the multi-path state control valve group 9, the eight oil inlets and the eight oil outlets are communicated through eighteen high-frequency oil path electromagnetic ball valves, and various oil path control is realized through combined switching control of the high-frequency oil path electromagnetic ball valves, so that the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 are switched between continuous switching between static testing and dynamic testing and different working conditions.

As shown in fig. 1, specifically: a first electromagnetic ball valve 91 is arranged between A1 and C1, a second electromagnetic ball valve 92 is arranged between B1 and D1, a third electromagnetic ball valve 93 is arranged between A2 and C2, a fourth electromagnetic ball valve 94 is arranged between B2 and D2, a fifth electromagnetic ball valve 95 is arranged between A3 and C3, a sixth electromagnetic ball valve 96 is arranged between B3 and D3, a seventh electromagnetic ball valve 97 is arranged between A4 and C4, and an eighth electromagnetic ball valve 98 is arranged between B4 and D4. A ninth electromagnetic ball valve 99 is arranged between A1 and C2, a tenth electromagnetic ball valve 910 is arranged between B1 and D2, an eleventh electromagnetic ball valve 911 is arranged between A2 and C1, and a twelfth electromagnetic ball valve 912 and a thirteenth electromagnetic ball valve 913 which are connected in series are arranged between B2 and D1; a fourteenth electromagnetic ball valve 914 is arranged between A3 and C4, a fifteenth electromagnetic ball valve 915 is arranged between B3 and D4, a sixteenth electromagnetic ball valve 916 is arranged between A4 and C3, and a seventeenth electromagnetic ball valve 917 and an eighteenth electromagnetic ball valve 918 which are connected in series are arranged between B4 and D3; in this way, each oil inlet on the multi-way state control valve group 9 is communicated with two oil outlets through the switching of the corresponding oil way electromagnetic ball valve.

As shown in fig. 1, ports a of the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 are respectively communicated with oil inlets A1, A2, A3 and A4 of the multi-way state control valve group 9 in a one-to-one correspondence manner, and ports B of the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 are respectively communicated with oil inlets B1, B2, B3 and B4 of the multi-way state control valve group 9 in a one-to-one correspondence manner. Specifically, a first tested valve 01A port is communicated with A1, a second tested valve 02A port is communicated with B1, a second tested valve 02A port is communicated with A2, a third tested valve 03A port is communicated with A3, a second tested valve 03A port is communicated with B3, a fourth tested valve 04A port is communicated with A4, and a second tested valve 02A port is communicated with B4. Through the electromagnetic control of four tested valves, the P port and the A port or the B port of the tested valves are switched to be communicated, so that oil inlets corresponding to the multi-way state control valve group 9 are controlled to feed oil.

As shown in fig. 1, in this embodiment, the static test assembly includes a first static dual-output-rod cylinder 05 corresponding to the oil outlets C1 and D1 of the multi-path state control valve group 9, and a second static dual-output-rod cylinder 06 corresponding to the oil outlets C3 and D3, where an a port and a B port of the first static dual-output-rod cylinder 05 are connected to C1 and D1, and an a port and a B port of the second static dual-output-rod cylinder 06 are connected to C3 and D3, respectively. The first static double-rod-outlet oil cylinder 05 and the second static double-rod-outlet oil cylinder 06 are respectively connected with a static displacement sensor 051, a static force sensor 052 and two static force sensors 053, and two groups of four static force sensors 053 are respectively connected between an A port and a C1 port, a B port and a D1 port of the first static double-rod-outlet oil cylinder 05, between an A port and a C3 port and a B port and a D3 port of the second static double-rod-outlet oil cylinder 06.

As shown in fig. 1, the dynamic test assembly includes a first dynamic dual-rod-outlet cylinder 07 corresponding to oil outlets C2 and D2 of the multi-path state control valve group 9 and a second dynamic dual-rod-outlet cylinder 08 corresponding to oil outlets C4 and D4, wherein an a port and a B port of the first dynamic dual-rod-outlet cylinder 07 are connected with C2 and D2, and an a port and a B port of the second dynamic dual-rod-outlet cylinder 08 are connected with C4 and D4, respectively. The first dynamic double-rod-outlet oil cylinder 07 and the second dynamic double-rod-outlet oil cylinder 08 are connected with a dynamic displacement sensor 071, a dynamic speed sensor 072 and two dynamic pressure sensors 073. Two groups of four dynamic pressure sensors 073 are respectively connected between an A port and a C2 port, a B port and a D2 port of the first dynamic double-rod-outlet oil cylinder 07, between an A port and a C4 port and between a B port and a D4 port of the second dynamic double-rod-outlet oil cylinder 08.

As shown in fig. 1, a first tested valve 01, a second tested valve 02, a first multi-path parallel detection system 5, a first static dual-rod-outlet oil cylinder 05 and a first dynamic dual-rod-outlet oil cylinder 07 are combined into a group, and a third tested valve 03, a fourth tested valve 04, a second multi-path parallel detection system 6, a second static dual-rod-outlet oil cylinder 06 and a second dynamic dual-rod-outlet oil cylinder 08 are combined into a group to respectively perform static test and dynamic test on four tested valves. Taking the first tested valve 01, the second tested valve 02, the first static double-rod oil cylinder 05 and the first dynamic double-rod oil cylinder 07 as examples, the static test and the dynamic test of the first tested valve 01 and the second tested valve 02 are described in detail.

As shown in fig. 1, a static test is performed on a first valve under test 01: only the first electromagnetic ball valve 91 and the second electromagnetic ball valve 92 are opened, the port A of the first tested valve 01 is connected with the port A of the first static double-rod oil cylinder 05 through the oil inlet A1, the first electromagnetic ball valve 91 and the oil outlet C1 of the multi-way state control valve group 9, and the port B of the first tested valve 01 is connected with the port B of the first static double-rod oil cylinder 05 through the oil inlet B1, the second electromagnetic ball valve 92 and the oil outlet D1 of the multi-way state control valve group 9. Through the electromagnetic control of the first tested valve 01, the communication of the port A and the port P or the communication of the port B and the port P are switched, the action of the first static double-rod-outlet oil cylinder 05 is controlled, the first tested valve 01 is subjected to static test, and meanwhile, related data information is collected through a static displacement sensor 051, a static force sensor 052 and two static pressure sensors 053 which are connected with the first static double-rod-outlet oil cylinder 05.

As shown in fig. 1, the second valve under test 02 is dynamically tested: the third electromagnetic ball valve 93 and the fourth electromagnetic ball valve 94 are only opened, the port A of the second tested valve 02 is connected with the port A of the first dynamic double-rod-outlet oil cylinder 07 through the oil inlet A2, the third electromagnetic ball valve 93 and the oil outlet C2 of the multi-way state control valve group 9, and the port B of the second tested valve 02 is connected with the port B of the first dynamic double-rod-outlet oil cylinder 07 through the oil inlet B2, the fourth electromagnetic ball valve 94 and the oil outlet D2 of the multi-way state control valve group 9. Through electromagnetic control of the second tested valve 02, the communication of the port A and the port P or the communication of the port B and the port P are switched, the action of the first dynamic double-rod-outlet oil cylinder 07 is controlled, the second tested valve 02 is dynamically tested, and meanwhile, related data information is collected through a dynamic displacement sensor 071, a dynamic speed sensor 072 and two dynamic pressure sensors 073 which are connected with the first dynamic double-rod-outlet oil cylinder 07.

As shown in fig. 1, the first valve under test 01 is dynamically tested: only opening the ninth electromagnetic ball valve 99 and the tenth electromagnetic ball valve 910, wherein the port A of the first tested valve 01 is connected with the port A of the first dynamic double-rod-outlet oil cylinder 07 through the oil inlet A1, the ninth electromagnetic ball valve 99 and the oil outlet C2 of the multi-way state control valve group 9, and the port B of the first tested valve 01 is connected with the port B of the first dynamic double-rod-outlet oil cylinder 07 through the oil inlet B1, the tenth electromagnetic ball valve 910 and the oil outlet D2 of the multi-way state control valve group 9. Through electromagnetic control of the first tested valve 01, the communication of the port A and the port P or the communication of the port B and the port P are switched, the action of the first dynamic double-rod-outlet oil cylinder 07 is controlled, the first tested valve 01 is dynamically tested, and meanwhile, related data information is collected through a dynamic displacement sensor 071, a dynamic speed sensor 072 and two dynamic pressure sensors 073 which are connected with the first dynamic double-rod-outlet oil cylinder 07.

As shown in fig. 1, the second valve under test 02 is subjected to static test: the eleventh electromagnetic ball valve 911, the twelfth electromagnetic ball valve 912 and the thirteenth electromagnetic ball valve 913 are only opened, the A port of the second tested valve 02 is connected with the A port of the first static double-rod oil cylinder 05 through the oil inlet A2, the eleventh electromagnetic ball valve 911 and the oil outlet C1 of the multi-way state control valve group 9, and the B port of the second tested valve 02 is connected with the B port of the first static double-rod oil cylinder 05 through the oil inlet B2, the second electromagnetic ball valve 92, the thirteenth electromagnetic ball valve 913 and the oil outlet D1 of the multi-way state control valve group 9. Through electromagnetic control of the second tested valve 02, the communication of the port A and the port P or the communication of the port B and the port P are switched, the action of the first static double-rod-outlet oil cylinder 05 is controlled, the second tested valve 02 is subjected to static test, and meanwhile, related data information is collected through a static displacement sensor 051, a static force sensor 052 and two static pressure sensors 053 which are connected with the first static double-rod-outlet oil cylinder 05.

As shown in fig. 1, the above static test of the first valve under test 01 and the dynamic test of the second valve under test 02 may be performed simultaneously, and the dynamic test of the first valve under test 01 and the static test of the second valve under test 02 may be performed simultaneously. The static test of the third valve under test 03, the dynamic test of the fourth valve under test 04, the dynamic test of the third valve under test 03, and the static test of the fourth valve under test 04 are performed in the same manner.

As shown in fig. 1, in this embodiment, a nineteenth electromagnetic ball valve 919 is further disposed between the oil inlet B1 and the oil outlet D2 of the multiple-way state control valve group 9, and the nineteenth electromagnetic ball valve 919 and the tenth electromagnetic ball valve 910 are disposed in parallel; and a twentieth electromagnetic ball valve 920 is further arranged between the oil inlet B3 and the oil outlet D4, and the twentieth electromagnetic ball valve 920 and the fifteenth electromagnetic ball valve 915 are arranged in parallel. Thus, the nineteenth and tenth

solenoid ball valves

919, 910 are in reserve with each other, and the twentieth and fifteenth

solenoid ball valves

920, 915 are in reserve with each other.

As shown in fig. 1, the Y ports of the first measured valve 01, the second measured valve 02, the third measured valve 03 and the fourth measured valve 04 are all communicated with a leak detection system 8, the leak detection system 8 is connected with an oil tank 11, and the leak detection system 8 detects the leak condition of the first measured valve 01, the second measured valve 02, the third measured valve 03 and the fourth measured valve 04. Specifically, the leak detection system 8 includes a small-flow electromagnetic ball valve 81, a large-flow electromagnetic ball valve 82, and a bypass electromagnetic valve 83 that are arranged in parallel, and the small-flow electromagnetic ball valve 81, the large-flow electromagnetic ball valve 82, and the bypass electromagnetic valve 83 are connected in parallel and then connected with an electromagnetic main valve 84, and Y ports of the first detected valve 01, the second detected valve 02, the third detected valve 03, and the fourth detected valve 04 are all connected with the electromagnetic main valve 84, and a leak electromagnetic ball valve 85 is respectively arranged between each Y port and the electromagnetic main valve 84. The small-flow electromagnetic ball valve 81 is connected with a measuring cup 86, the large-flow electromagnetic ball valve 82 is sequentially connected with a leakage filter 87 and a sixth flowmeter 88, and the sixth flowmeter 88 and the bypass electromagnetic valve 83 are connected with the oil tank 11. The branch circuit formed by the small-flow electromagnetic ball valve 81 and the measuring cup 86 is micro-leakage detection, and is used when the leakage oil flow is insufficient to be detected by the sixth flowmeter 88. The branch consisting of the large-flow electromagnetic ball valve 82, the leakage filter 87 and the sixth flowmeter 88 is a large-flow leakage detection branch, and the bypass electromagnetic valve 83 branch is a normal liquid discharge branch.

As shown in fig. 1, the oil outlets DE, DF, DG, DH of the multiple-path composite oil source control valve group 3 are also connected with a first pressure reducing valve 41, a second pressure reducing valve 42, a third pressure reducing valve 43 and a fourth pressure reducing valve 44 which are in one-to-one correspondence with the oil outlets DE, DF, DG, DH, and pressure reducing electromagnetic ball valves 45 are respectively arranged between the first pressure reducing valve 41, the second pressure reducing valve 42, the third pressure reducing valve 43 and the fourth pressure reducing valve 44 and the corresponding oil outlets DE, DF, DG, DH. The X ports of the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 are respectively provided with a control electromagnetic ball valve 4, and the four control electromagnetic ball valves 4 are connected in parallel and then respectively connected with a first pressure reducing valve 41, a second pressure reducing valve 42, a third pressure reducing valve 43 and a fourth pressure reducing valve 44. A first switching electromagnetic ball valve 46 is arranged between the oil inlet of the first pressure reducing valve 41 and the oil inlet of the second pressure reducing valve 42, and a second switching electromagnetic ball valve 47 is arranged between the oil inlet of the third pressure reducing valve 43 and the oil inlet of the fourth pressure reducing valve 44. The four pressure reducing valves are used for controlling the pressure of the four tested valves, the corresponding control electromagnetic ball valve 4 and the corresponding pressure reducing electromagnetic ball valve 45 can be opened and closed according to the actual use requirement, the first pressure reducing valve 41 and the second pressure reducing valve 42 are mutually standby through the first switching electromagnetic ball valve 46, and the third pressure reducing valve 43 and the fourth pressure reducing valve 44 are mutually standby through the second switching electromagnetic ball valve 47.

According to the utility model, under the condition that the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 do not replace a test valve table (namely, the test table where a hydraulic system is arranged is the prior art), hydraulic oil with different flow rates is output by a pump station system 1 according to the test requirement of the tested valves, an oil way is switched through a multi-channel composite oil source control valve group 3, a first multi-channel parallel detection system 5, a second multi-channel parallel detection system 6, a multi-channel state control valve group 9 and a digital hydraulic energy storage system 7, the tested valves control corresponding static test components and dynamic test components to work, a switching test between static test and dynamic test is performed, the actual working condition and the continuous operation element test specified action are simulated, and data of a static displacement sensor 051, a static sensor 050713, a dynamic displacement sensor 0723, a dynamic pressure sensor 073 and a flowmeter are acquired in the test process, and the reliability of the tested valves is obtained according to data comparison and abnormal data analysis. In the test process, the test can be continuously repeated, the number of samples is increased, and the accuracy of the test result is improved.

The application method and the working principle of the utility model are as follows:

as shown in fig. 1, a first valve under test 01 is specifically described as an example:

s1, connecting a hydraulic system with a computer system; the hydraulic system is configured with a power line, a control line, a sensing line and the like which are connected with the power supply, is connected with a computer system for testing an operation platform, inputs all sensors and temperature signals into the computer system, and the computer system is based on a CPCI bus integrated industrial personal computer (CPCI) bus integrated control scheme, and controls the transmission of instructions and A/D acquisition data to be carried out through the CPCI bus, so that the accuracy requirement of a standard instrument is met. The computer system records the stored data in real time and outputs characteristic curves such as a flow-pressure curve, a differential pressure curve, an internal leakage characteristic curve and the like; all instruction actions and sequence execution records of the multi-sample test reliability test are recorded and stored, and data classification of the sample test is compared. The computer system for testing is the prior art and will not be described in detail.

S2, according to the flow test range of the first tested valve 01, whether the first plunger pump 21 is used for oil supply or the first plunger pump 21 and the second plunger pump 22 are used for oil supply in a combined mode is determined, and the digital hydraulic energy storage system 7 can be selected for oil supply supplement, so that the oil supply flow can meet the flow test requirement of the first tested valve 01.

S3, setting rated working pressure of a corresponding unloading valve 27 according to the selected plunger pump, so as to adjust the working pressure of the corresponding plunger pump and ensure the test pressure of the first tested valve 01; meanwhile, the control pressure of the port 01X of the first tested valve is regulated by the first pressure reducing valve 41, so that the pressure stability of the first tested valve 01 is ensured; of course, if the first pressure reducing valve 41 fails, another pressure reducing valve may be selected to adjust the control pressure of the port 01X of the first valve under test.

S4, determining the channel options of the oil inlet and the oil outlet of the multi-channel composite oil source control valve group 3; if only the first plunger pump 21 is selected to supply oil to the first tested valve 01 in the S2, the oil inlet DA and the oil outlet DE of the multi-path composite oil source control valve group 3 are controlled to be communicated; if the first plunger pump 21 and the second plunger pump 22 are selected to be combined to supply oil to the first tested valve 01 in the S2, the oil inlet DA and the oil outlet DE of the multi-path composite oil source control valve group 3 are controlled to be communicated, and the oil inlet DB is also controlled to be communicated with the oil outlet DE.

S5, according to the measured flow requirement of the first measured valve 01, selecting whether the first flow meter 51 or the second flow meter 52 is used, if the first flow meter 51 is used, opening the first flow electromagnetic ball valve 53, the second flow electromagnetic ball valve 54 and the second oil outlet electromagnetic ball valve 58, if the second flow meter 52 is used, opening the third flow electromagnetic ball valve 55, the fourth flow electromagnetic ball valve 56 and the first oil outlet electromagnetic ball valve 57.

S6, determining oil ways of the multi-way state control valve group 9, namely determining program options for automatically switching dynamic test and static test; when the first tested valve 01 is subjected to static test, an A1 port and a C1 port of the multi-way state control valve group 9 are communicated, a B1 port and a D1 port are communicated, namely, the corresponding first electromagnetic ball valve 91 and second electromagnetic ball valve 92 are opened, the first static double-rod oil cylinder 05 is driven to act through electromagnetic switching of the first tested valve 01, static test of the first tested valve 01 is carried out, and the static characteristics of the first tested valve 01 are analyzed according to feedback results of the static displacement sensor 051, the static force sensor 052 and the two static pressure sensors 053 on the first static double-rod oil cylinder 05. When the first tested valve 01 is dynamically tested, the port A1 and the port C2 of the multi-path state control valve group 9 are communicated, the port B1 and the port D2 are communicated, namely, the corresponding ninth electromagnetic ball valve 99, tenth electromagnetic ball valve 910 or nineteenth electromagnetic ball valve 919 is opened, the first dynamic double-rod oil cylinder 07 is driven to act through electromagnetic switching of the first tested valve 01, dynamic testing of the first tested valve 01 is carried out, and dynamic characteristics of the first tested valve 01 are analyzed according to feedback results of a dynamic displacement sensor 071, a dynamic speed sensor 072 and two dynamic pressure sensors 073 on the first dynamic double-rod oil cylinder 07.

S7, after the test parameters in S2-S6 are determined, inputting parameters and test reliability options in a computer system, confirming that each part in the hydraulic system works normally, and finally confirming the reliability running time and the switching frequency of the simulation working condition; and (3) inputting all test parameters determined in the steps (S2-S6) into a computer system, confirming that all parts participating in static test and dynamic test of the first tested valve 01 can work normally, selecting a reliability test in the computer system, and confirming the reliability running time and the switching frequency of the work of the first static double-rod-outlet oil cylinder 05 and the first dynamic double-rod-outlet oil cylinder 07.

S8, starting a hydraulic system to start a test, recording and running all data by a computer system, outputting a characteristic curve in real time, and observing whether the hydraulic system has abnormal pressure fluctuation, abnormal noise and abnormal temperature change through real-time data acquisition in the test process; once a certain sample is abnormal, judging the reliability influence based on the comparison of the collected data sample library and the degree of abnormality, and recording the accumulated number of abnormal times of the sample;

and S9, when the abnormal times reach the judging range of reliability failure, the hydraulic system stops working, the tested valve is disassembled to carry out part disassembly inspection on the tested valve, whether abrasion of each friction pair is normal or not is checked, whether phenomena such as grinding damage, burn and peeling occur or not is checked, and after the failure association factors of the tested valve are determined, the data sample classification library of the computer system is input to establish a corresponding reliability failure model.

When a similar specification model or similar working condition simulation test is carried out, repeating the steps S1-S9, and increasing test sample data; the computer system archives the signal data of each sensor, and extracts the reliability characteristic data of the tested valve through the analysis of the comparative test sample data.

According to the utility model, the pump station system 1 is formed by the first plunger pump 21, the second plunger pump 22, the third plunger pump 23 and the fourth plunger pump 24 with different flow rate specifications, so that the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 with different range flow rate specifications can be tested at the same time, the sample types of the tested valves are increased, and the test efficiency is improved; continuous operation data detection under the simulation working condition is realized through a joint control loop of the multi-path composite oil source control valve bank 3, the first multi-path parallel detection system 5, the second multi-path parallel detection system 6 and the multi-path state control valve bank 9, so that the number of test samples is increased, and the test switching time is saved; the digital hydraulic energy storage system 7 is used for realizing control output of specific flow and pressure and short-time high-flow characteristic test; the state conversion of the tested valves between the static test system and the dynamic test system is switched through the multi-path state control valve group 9, and meanwhile, the continuous reliability test of the first tested valve 01, the second tested valve 02, the third tested valve 03 and the fourth tested valve 04 is realized.

While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of use in various other combinations, modifications and environments and is capable of changes or modifications within the spirit of the utility model herein, either as a result of the foregoing teachings or as a result of the knowledge or skill of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims

1. The utility model provides a proportional flow valve reliability test uses hydraulic system which characterized in that: the system comprises a pump station system (1), a multi-path composite oil source control valve bank (3), a first multi-path parallel detection system (5), a second multi-path parallel detection system (6), a multi-path state control valve bank (9), a static test assembly and a dynamic test assembly, wherein a first tested valve (01), a second tested valve (02), a third tested valve (03) and a fourth tested valve (04) are arranged between the multi-path composite oil source control valve bank (3) and the multi-path state control valve bank (9);

the pump station system (1) comprises an oil tank (11) and four first plunger pumps (21), second plunger pumps (22), third plunger pumps (23) and fourth plunger pumps (24) which are connected in parallel and have different flow ranges, oil inlets of the first plunger pumps (21), the second plunger pumps (22), the third plunger pumps (23) and the fourth plunger pumps (24) are respectively communicated with the oil tank (11), oil outlets are respectively connected with an oil inlet one-way valve (25), and an unloading valve (27) is connected between the oil outlet of each oil inlet one-way valve (25) and the oil tank (11);

An oil inlet DA, DB, DC, DD which is correspondingly communicated with the four oil inlet one-way valves (25) and an oil outlet DE, DF, DG, DH which is correspondingly communicated with the four oil inlets are arranged on the multi-path composite oil source control valve group (3), and the oil outlets DE, DF, DG, DH are respectively connected with an oil outlet pressure sensor (30); a first oil source electromagnetic ball valve (31) is arranged between the DA and the DE, a second oil source electromagnetic ball valve (32) is arranged between the DB and the DF, a third oil source electromagnetic ball valve (33) is arranged between the DC and the DG, and a fourth oil source electromagnetic ball valve (34) is arranged between the DD and the DH; a fifth oil source electromagnetic ball valve (35) is arranged between the DA and the DB, a sixth oil source electromagnetic ball valve (36) is arranged between the DB and the DE, a seventh oil source electromagnetic ball valve (37) is arranged between the DB and the DC, an eighth oil source electromagnetic ball valve (38) is arranged between the DC and the DF, a ninth oil source electromagnetic ball valve (39) is arranged between the DC and the DD, and a tenth oil source electromagnetic ball valve (310) is arranged between the DD and the DG;

eight oil inlets A1, B1, A2, B2, A3, B3, A4 and B4 and oil outlets C1, D1, C2, D2, C3, D3, C4 and D4 which are in one-to-one correspondence with the eight oil inlets are arranged on the multi-way state control valve group (9), a first electromagnetic ball valve (91) is arranged between the A1 and the C1, a second electromagnetic ball valve (92) is arranged between the B1 and the D1, a third electromagnetic ball valve (93) is arranged between the A2 and the C2, a fourth electromagnetic ball valve (94) is arranged between the B2 and the D2, a fifth electromagnetic ball valve (95) is arranged between the A3 and the C3, a sixth electromagnetic ball valve (96) is arranged between the B3 and the D3, a seventh electromagnetic ball valve (97) is arranged between the A4 and the C4, and an eighth electromagnetic ball valve (98) is arranged between the B4 and the D4;

A ninth electromagnetic ball valve (99) is arranged between A1 and C2, a tenth electromagnetic ball valve (910) is arranged between B1 and D2, an eleventh electromagnetic ball valve (911) is arranged between A2 and C1, and a twelfth electromagnetic ball valve (912) and a thirteenth electromagnetic ball valve (913) which are connected in series are arranged between B2 and D1; a fourteenth electromagnetic ball valve (914) is arranged between A3 and C4, a fifteenth electromagnetic ball valve (915) is arranged between B3 and D4, a sixteenth electromagnetic ball valve (916) is arranged between A4 and C3, and a seventeenth electromagnetic ball valve (917) and an eighteenth electromagnetic ball valve (918) which are connected in series are arranged between B4 and D3;

the static test assembly comprises a first static double-rod-outlet oil cylinder (05) corresponding to oil outlets C1 and D1 of the multi-channel state control valve group (9) and a second static double-rod-outlet oil cylinder (06) corresponding to oil outlets C3 and D3, wherein an A port of the first static double-rod-outlet oil cylinder (05) and an A port of the second static double-rod-outlet oil cylinder (06) are respectively communicated with the oil outlets C1 and C3 of the multi-channel state control valve group (9), and a B port of the first static double-rod-outlet oil cylinder (05) and a B port of the second static double-rod-outlet oil cylinder (06) are respectively communicated with the oil outlets D1 and D3 of the multi-channel state control valve group (9); the first static double-rod-outlet oil cylinder (05) and the second static double-rod-outlet oil cylinder (06) are connected with a static displacement sensor (051), a static force sensor (052) and two static pressure sensors (053);

The dynamic test assembly comprises a first dynamic double-rod-outlet oil cylinder (07) corresponding to oil outlets C2 and D2 of the multi-channel state control valve group (9) and a second dynamic double-rod-outlet oil cylinder (08) corresponding to oil outlets C4 and D4, wherein an A port of the first dynamic double-rod-outlet oil cylinder (07) and an A port of the second dynamic double-rod-outlet oil cylinder (08) are respectively communicated with the oil outlets C2 and C4 of the multi-channel state control valve group (9), and a B port of the first dynamic double-rod-outlet oil cylinder (07) and a B port of the second dynamic double-rod-outlet oil cylinder (08) are respectively communicated with the oil outlets D2 and D4 of the multi-channel state control valve group (9); the first dynamic double-rod-outlet oil cylinder (07) and the second dynamic double-rod-outlet oil cylinder (08) are connected with a dynamic displacement sensor (071), a dynamic speed sensor (072) and two dynamic pressure sensors (073);

the P ports of the first tested valve (01), the second tested valve (02), the third tested valve (03) and the fourth tested valve (04) are respectively communicated with the oil outlets DE, DF, DG, DH of the multi-channel compound oil source control valve group (3) in one-to-one correspondence, the A ports are respectively communicated with the oil inlets A1, A2, A3 and A4 of the multi-channel state control valve group (9) in one-to-one correspondence, and the B ports are respectively communicated with the oil inlets B1, B2, B3 and B4 of the multi-channel state control valve group (9) in one-to-one correspondence; t ports of the first tested valve (01) and the second tested valve (02) are communicated with the first multi-path parallel detection system (5), and T ports of the third tested valve (03) and the fourth tested valve (04) are communicated with the second multi-path parallel detection system (6).

2. The hydraulic system for reliability test of proportional flow valve according to claim 1, wherein: the first multipath parallel detection system (5) comprises a first flowmeter (51) and a second flowmeter (52) which are connected in parallel, wherein two ends of the first flowmeter (51) are respectively connected with a first flow electromagnetic ball valve (53) and a second flow electromagnetic ball valve (54), and two ends of the second flowmeter (52) are respectively connected with a third flow electromagnetic ball valve (55) and a fourth flow electromagnetic ball valve (56); the first flow electromagnetic ball valve (53) and the third flow electromagnetic ball valve (55) are connected in parallel and then communicated with the T port of the first tested valve (01), and the second flow electromagnetic ball valve (54) is connected in parallel with the fourth flow electromagnetic ball valve (56) and then communicated with the T port of the second tested valve (02); the first flow electromagnetic ball valve (53) and the third flow electromagnetic ball valve (55) are connected in parallel and then are further connected with a first oil outlet electromagnetic ball valve (57), the second flow electromagnetic ball valve (54) and the fourth flow electromagnetic ball valve (56) are connected in parallel and then are further connected with a second oil outlet electromagnetic ball valve (58), oil outlets of the first oil outlet electromagnetic ball valve (57) and the second oil outlet electromagnetic ball valve (58) are connected with the oil tank (11), an oil inlet of the first oil outlet electromagnetic ball valve (57) is directly connected with a T-port of a first tested valve (01), and an oil inlet of the second oil outlet electromagnetic ball valve (58) is directly connected with a T-port of a second tested valve (02);

The second multipath parallel detection system (6) comprises a third flowmeter (61) and a fourth flowmeter (62) which are connected in parallel, wherein two ends of the third flowmeter (61) are respectively connected with a fifth flow electromagnetic ball valve (63) and a sixth flow electromagnetic ball valve (64), and two ends of the fourth flowmeter (62) are respectively connected with a seventh flow electromagnetic ball valve (65) and an eighth flow electromagnetic ball valve (66); the fifth flow electromagnetic ball valve (63) and the seventh flow electromagnetic ball valve (65) are connected in parallel and then communicated with the T port of the third tested valve (03), and the sixth flow electromagnetic ball valve (64) is connected in parallel with the eighth flow electromagnetic ball valve (66) and then communicated with the T port of the fourth tested valve (04); the fifth flow electromagnetic ball valve (63) and the seventh flow electromagnetic ball valve (65) are connected in parallel and then are further connected with a third oil outlet electromagnetic ball valve (67), the sixth flow electromagnetic ball valve (64) is connected with a fourth oil outlet electromagnetic ball valve (68) after being connected in parallel with an eighth flow electromagnetic ball valve (66), oil outlets of the third oil outlet electromagnetic ball valve (67) and the fourth oil outlet electromagnetic ball valve (68) are connected with an oil tank (11), an oil inlet of the third oil outlet electromagnetic ball valve (67) is directly connected with a T-port of a third tested valve (03), and an oil inlet of the fourth oil outlet electromagnetic ball valve (68) is directly connected with a T-port of a fourth tested valve (04); and the T ports of the first tested valve (01), the second tested valve (02), the third tested valve (03) and the fourth tested valve (04) are respectively connected with a flow pressure sensor (69).

3. The hydraulic system for reliability test of proportional flow valve according to claim 1, wherein: the hydraulic pressure control system further comprises a digital hydraulic pressure energy storage system (7) connected with the P ports of the first tested valve (01), the second tested valve (02), the third tested valve (03) and the fourth tested valve (04), wherein the digital hydraulic pressure energy storage system (7) comprises three energy storages (71) which are connected in parallel, the three energy storages (71) are connected with a digital valve group (72) in parallel, and an energy storage electromagnetic ball valve (76) is arranged between each energy storage (71) and the digital valve group (72); the digital valve group (72) is sequentially connected with an energy storage pressure sensor (73) and a fifth flowmeter (74), P ports of the first measured valve (01), the second measured valve (02), the third measured valve (03) and the fourth measured valve (04) are respectively communicated with the fifth flowmeter (74), and an oil supplementing electromagnetic ball valve (75) is arranged between each P port and the fifth flowmeter (74).

4. The hydraulic system for reliability test of proportional flow valve according to claim 1, wherein: the leakage detection system (8) is connected with Y ports of the first detected valve (01), the second detected valve (02), the third detected valve (03) and the fourth detected valve (04), the leakage detection system (8) comprises a small-flow electromagnetic ball valve (81), a large-flow electromagnetic ball valve (82) and a bypass electromagnetic valve (83) which are arranged in parallel, the small-flow electromagnetic ball valve (81), the large-flow electromagnetic ball valve (82) and the bypass electromagnetic valve (83) are connected in parallel and then are connected with an electromagnetic main valve (84), Y ports of the first detected valve (01), the second detected valve (02), the third detected valve (03) and the fourth detected valve (04) are connected with the electromagnetic main valve (84), and a leakage electromagnetic ball valve (85) is arranged between each Y port and the electromagnetic main valve (84); the small-flow electromagnetic ball valve (81) is connected with the measuring cup (86), the large-flow electromagnetic ball valve (82) is sequentially connected with the leakage filter (87) and the sixth flowmeter (88), and the sixth flowmeter (88) and the bypass electromagnetic valve (83) are connected with the oil tank (11).

5. The hydraulic system for reliability test of proportional flow valve according to claim 1, wherein: the oil outlets DE, DF, DG, DH of the multi-path composite oil source control valve bank (3) are also respectively connected with a first pressure reducing valve (41), a second pressure reducing valve (42), a third pressure reducing valve (43) and a fourth pressure reducing valve (44) which are in one-to-one correspondence with the multi-path composite oil source control valve bank, and pressure reducing electromagnetic ball valves (45) are respectively arranged between the first pressure reducing valve (41), the second pressure reducing valve (42), the third pressure reducing valve (43) and the fourth pressure reducing valve (44) and the corresponding oil outlets DE, DF, DG, DH; the X ports of the first tested valve (01), the second tested valve (02), the third tested valve (03) and the fourth tested valve (04) are respectively provided with a control electromagnetic ball valve (4), and the four control electromagnetic ball valves (4) are connected in parallel and then are respectively connected with a first pressure reducing valve (41), a second pressure reducing valve (42), a third pressure reducing valve (43) and a fourth pressure reducing valve (44); a first switching electromagnetic ball valve (46) is arranged between an oil inlet of the first pressure reducing valve (41) and an oil inlet of the second pressure reducing valve (42), and a second switching electromagnetic ball valve (47) is arranged between an oil inlet of the third pressure reducing valve (43) and an oil inlet of the fourth pressure reducing valve (44).

6. The hydraulic system for reliability test of proportional flow valve according to claim 1, wherein: each oil inlet check valve (25) and the oil inlets DA, DB, DC, DD corresponding to the oil inlet check valves in a one-to-one mode are respectively arranged on the multi-channel composite oil source control valve group (3), each oil outlet of each oil inlet check valve (25) is further connected with a buffer energy accumulator (29), each buffer energy accumulator (29) connected with the oil inlet check valve (25), each oil inlet filter (28) and each unloading valve (27) are arranged in parallel, and each oil inlet of each oil inlet check valve (25) is connected with an oil inlet pressure sensor (26).

7. The hydraulic system for reliability test of proportional flow valve according to claim 1, wherein: a nineteenth electromagnetic ball valve (919) is further arranged between the oil inlet B1 and the oil outlet D2 of the multi-way state control valve group (9), and the nineteenth electromagnetic ball valve (919) and the tenth electromagnetic ball valve (910) are arranged in parallel; and a twentieth electromagnetic ball valve (920) is further arranged between the oil inlet B3 and the oil outlet D4, and the twentieth electromagnetic ball valve (920) and the fifteenth electromagnetic ball valve (915) are arranged in parallel.

8. The hydraulic system for reliability test of proportional flow valve according to claim 1, wherein: the oil tank (11) is further connected with a heating device (12), an air filter (13), a temperature detector (14), an oil cooling unit (15) and an oil return filter (16), the heating device (12) is provided with a plurality of oil tanks (11), an oil inlet and an oil outlet of the oil cooling unit (15) are connected with the oil tanks (11), an oil inlet of the oil return filter (16) is connected with an oil receiving groove, and an oil outlet is connected with the oil tanks (11).