Fluid valve testing system

Abstract

The invention relates to a fluid valve testing system which comprises a pressure oil pressing device, the pressure oil pressing device is connected with a pressure oil port of a first reversing valve, the pressure oil pressing device is connected with an oil return port of the first reversing valve, and a first oil outlet and a second oil outlet of the first reversing valve are connected with a first control port and a second control port of a fluid valve respectively. The first reversing valve has a first state in which the pressure oil port is communicated with the first oil outlet and the oil return port is communicated with the second oil outlet, and a second state in which the pressure oil port is communicated with the second oil outlet and the oil return port is communicated with the first oil outlet; the pressure oil pressing device is used for pressing a first control port and a second control port of the fluid valve so as to test whether the fluid valve can be switched on or switched off; the fluid sample pressing device is used for pressing a sample inlet and a sample outlet of the fluid valve, and the pressure data acquisition unit is used for acquiring corresponding pressure data. According to the invention, the test time is saved, and the test efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore oil exploration and development, and in particular relates to a fluid valve testing system. Background Art

[0002] During the manufacturing and on-site maintenance of the formation tester, it is necessary to carry out pressure maintenance testing on the upper and lower chambers of the hydraulic control line of the internal fluid valve and the upper and lower chambers of the intermediate sample control line, so as to judge whether the fluid valve can be used in the formation tester based on the test results.

[0003] The existing fluid valve pressure test device can only test one control path of a fluid valve separately at a time. Therefore, to complete a fluid valve pressure test, it is necessary to disassemble the pressure port 4 times, and each port is pressure-maintained for 30 minutes. Including the disassembly and assembly time, it takes 2.5 hours to complete a fluid control valve test. A formation tester instrument string contains multiple fluid valves, so it takes a lot of time to maintain a formation tester. Therefore, the existing fluid valve pressure test device has the disadvantages of being time-consuming, labor-intensive and inefficient. Summary of the invention

[0004] In order to solve all or part of the above problems, the present invention aims to provide a fluid valve testing system. The fluid valve testing system of the present invention saves testing time and improves testing efficiency.

[0005] According to one aspect of the present invention, a fluid valve testing system is provided, comprising a pressure oil pressure device, a first reversing valve, a fluid sample pressure device, a second reversing valve and a pressure data acquisition unit, wherein:

[0006] The pressure oil pressing device is connected to the pressure oil port of the first reversing valve through a pressure oil pipeline, the pressure oil pressing device is connected to the return oil port of the first reversing valve through a return oil pipeline, the first oil outlet of the first reversing valve and the second oil outlet of the first reversing valve are respectively connected to the first control port and the second control port of the fluid valve, the first reversing valve has a first state in which the pressure oil port is connected to the first oil outlet and the return oil port is connected to the second oil outlet, and a second state in which the pressure oil port is connected to the second oil outlet and the return oil port is connected to the first oil outlet;

[0007] The pressure oil pressure device is used to pressurize the first control port and the second control port of the fluid valve through the first reversing valve to test whether the fluid valve can be turned on and off;

[0008] The fluid sample pressure device is connected to the pressure port of the second reversing valve through a fluid pipeline, the first outlet of the second reversing valve is connected to the sample inlet of the fluid valve, and the second outlet of the second reversing valve is connected to the sample outlet of the fluid valve; the second reversing valve has a first state in which the pressure port is connected to the first outlet, and a second state in which the pressure port is connected to the second outlet;

[0009] The fluid sample pressurizing device is used to pressurize the sample inlet and sample outlet of the fluid valve respectively through the second reversing valve, and the pressure data acquisition unit is used to acquire corresponding pressure data to determine the pressure maintaining performance of the fluid valve according to the pressure data.

[0010] Furthermore, the first reversing valve is a three-position four-way reversing valve.

[0011] Furthermore, the first oil outlet of the first reversing valve is connected to one end of the first pressure oil pressure pipeline, the second oil outlet of the first reversing valve is connected to one end of the second pressure oil pressure pipeline, and the other ends of the first pressure oil pressure pipeline and the second pressure oil pressure pipeline are both connected to plugs;

[0012] The first pressure oil pressurizing pipeline is connected to a plurality of first pressure oil branch pipelines, and the second pressure oil pressurizing pipeline is connected to a plurality of second pressure oil branch pipelines. The number of the first pressure oil branch pipelines and the second pressure oil branch pipelines are equal. Each of the first pressure oil branch pipelines is respectively connected to a first control port of the fluid valve, and each of the second pressure oil branch pipelines is respectively connected to a second control port of the fluid valve.

[0013] Furthermore, the second reversing valve is a three-position three-way reversing valve.

[0014] Furthermore, the pressure data acquisition unit includes a pressure sensor disposed on the fluid pipeline, the pressure sensor is connected to a display unit, and the display unit is used to display a corresponding pressure value.

[0015] Furthermore, the first outlet of the second reversing valve is connected to one end of the first fluid pressure pipeline, the second outlet of the second reversing valve is connected to one end of the second fluid pressure pipeline, and the other ends of the first fluid pressure pipeline and the second fluid pressure pipeline are both connected to plugs;

[0016] The first fluid pressure pipeline is connected to a plurality of first fluid branch pipelines, and the second fluid pressure pipeline is connected to a plurality of second fluid branch pipelines. The number of the first fluid branch pipelines and the second fluid branch pipelines are equal. Each of the first fluid branch pipelines is respectively connected to a sample inlet of the fluid valve, and each of the second fluid branch pipelines is respectively connected to a sample outlet of the fluid valve.

[0017] Furthermore, each of the first fluid branch pipelines is respectively provided with a first stop valve.

[0018] Furthermore, each of the second fluid branch pipelines is respectively provided with a second stop valve.

[0019] Furthermore, the fluid valve testing system also includes a base, on which is provided a mounting hole corresponding to the fluid valve, and on which is provided corresponding through holes connecting the first oil outlet of the first reversing valve and the first control port of the fluid valve, the second oil outlet of the first reversing valve and the second control port of the fluid valve, the first outlet of the second reversing valve and the sample inlet of the fluid valve, and the second outlet of the second reversing valve and the sample outlet of the fluid valve.

[0020] Furthermore, the pressure oil pressing device, the fluid sample pressing device and the base are all provided with safety protection baffles.

[0021] It can be seen from the above technical solution that the fluid valve testing system provided by the present invention has the following beneficial effects:

[0022] The fluid valve testing system of the present invention can complete the testing of four ports, namely the first control port, the second control port, the sample inlet port and the sample outlet port, through the setting of the first reversing valve and the second reversing valve. One installation can realize the control of multiple fluid valves, thereby greatly saving the testing time and improving the testing efficiency.

[0023] The fluid valve testing system of the present invention can detect pressure changes in real time through the wireless connection between the pressure gauge and the display unit, so as to record the pressure data.

[0024] The fluid valve testing system of the present invention can avoid the safety risks caused by high-pressure leakage at the connection port by providing a safety protection baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a fluid valve testing system according to an embodiment of the present invention;

[0026] Figure 2 A front view of a base of a fluid valve testing system according to an embodiment of the present invention;

[0027] Figure 3 A bottom view of a base of a fluid valve testing system according to an embodiment of the present invention;

[0028] Figure 4 A top view of a base of a fluid valve testing system according to an embodiment of the present invention;

[0029] Figure 5 It is a left side view of a base body of a fluid valve testing system according to an embodiment of the present invention;

[0030] Figure 6 It is a right side view of a base body of a fluid valve testing system according to an embodiment of the present invention;

[0031] The accompanying drawings in the figure are marked as: fluid sample pressurizing device 1, pressure oil pressurizing device 2, pressure gauge 3, first reversing valve 4, second reversing valve 5, fluid valve 6, fluid pipeline 7, first fluid pressurizing pipeline 8, second fluid pressurizing pipeline 9, first pressure oil pressurizing pipeline 10, second pressure oil pressurizing pipeline 11, display unit 12, base 13, first stop valve 14. DETAILED DESCRIPTION

[0032] In order to better understand the purpose, structure and function of the present invention, a fluid valve testing system of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] like Figure 1 As shown, it shows a fluid valve testing system of an embodiment of the present invention, including a pressure oil pressing device 2, a first reversing valve 4, a fluid sample pressing device 1, a second reversing valve 5 and a pressure data acquisition unit, wherein the pressure oil pressing device 2 is connected to the pressure oil port of the first reversing valve 4 through a pressure oil pipeline, the pressure oil pressing device 2 is connected to the return oil port of the first reversing valve 4 through a return oil pipeline, the first oil outlet of the first reversing valve 4 and the second oil outlet of the first reversing valve 4 are respectively connected to the first control port and the second control port of the fluid valve 6, the first reversing valve 4 has a first state in which the pressure oil port is connected to the first oil outlet and the return oil port is connected to the second oil outlet, and a second state in which the pressure oil port is connected to the second oil outlet and the return oil port is connected to the first oil outlet; the pressure oil pressing device 2 is used to pressurize the first control port and the second control port of the fluid valve 6 through the first reversing valve 4, so as to test whether the fluid valve 6 can be conducted and cut off.

[0034] The fluid sample pressurizing device 1 is connected to the pressurizing port of the second reversing valve 5 through the fluid pipeline 7, the first outlet of the second reversing valve 5 is connected to the sample inlet of the fluid valve 6, and the second outlet of the second reversing valve 5 is connected to the sample outlet of the fluid valve 6; the second reversing valve 5 has a first state in which the pressurizing port is connected to the first outlet, and a second state in which the pressurizing port is connected to the second outlet; the fluid sample pressurizing device 1 is used to pressurize the sample inlet and sample outlet of the fluid valve 6 respectively through the second reversing valve 5, and the pressure data acquisition unit is used to acquire corresponding pressure data to judge the pressure maintaining performance of the fluid valve 6 according to the pressure data.

[0035] The fluid valve 6 testing system of this embodiment can test whether the on state and the off state of the fluid valve 6 can be switched normally, and test the pressure maintaining performance of the fluid valve 6 when it is in the off state.

[0036] First, for the test of whether the on state and the off state of the fluid valve 6 can be switched normally, the following is explained by taking the case that when the pressure of the first control port of the fluid valve 6 is greater than the pressure of the second control port, the fluid valve 6 is on, and when the pressure of the second control port of the fluid valve 6 is greater than the pressure of the first control port, the fluid valve 6 is off as an example:

[0037] For the fluid valve 6 in the cut-off state, the first reversing valve 4 is adjusted to the first state, and the pressure oil suppressing device 2 outputs the pressure oil to the outside. The pressure oil output by the pressure oil suppressing device 2 acts on the first control port of the fluid valve 6 through the pressure oil port and the first oil outlet of the first reversing valve 4. At the same time, the pressure oil in the second control port of the fluid valve 6 returns to the pressure oil suppressing device 2 through the second oil outlet and the return oil port of the first reversing valve 4. At this time, the pressure of the first control port of the fluid valve 6 is greater than the pressure of the second control port. If the fluid valve 6 is in a normal state, the fluid valve 6 will change from cut-off to conduction.

[0038] For the fluid valve 6 in the on state, the first reversing valve 4 is adjusted to the second state, and the pressure oil suppressing device 2 outputs the pressure oil to the outside. The pressure oil output by the pressure oil suppressing device 2 acts on the second control port of the fluid valve 6 through the pressure oil port and the second oil outlet of the first reversing valve 4. At the same time, the pressure oil in the first control port of the fluid valve 6 returns to the pressure oil suppressing device 2 through the first oil outlet and the return oil port of the first reversing valve 4. At this time, the pressure at the second control port of the fluid valve 6 is greater than the pressure at the first control port. If the fluid valve 6 is in a normal state, the fluid valve 6 will change from on to off.

[0039] This embodiment achieves testing of two control ports in one assembly by adjusting the state of the first reversing valve 4, thereby greatly improving the test efficiency compared to the prior art in which only one control port can be tested in one assembly.

[0040] Next, the test of the pressure holding performance of the fluid valve 6 when it is in the cut-off state is described as follows:

[0041] For the fluid valve 6 that can normally switch between the on state and the off state, taking the second reversing valve 5 in the first state as an example, the fluid valve 6 is adjusted to the off state, and then the pressure port of the second reversing valve 5 is pressurized through the fluid sample pressurizing device 1. The fluid sample acts on the sample inlet of the fluid valve 6 through the pressure port of the second reversing valve 5 and the first outlet of the second reversing valve 5. At this time, the pressure collection unit collects the pressure data acting on the sample inlet of the fluid valve 6. If the pressure data does not decrease within the set pressure holding time, it means that the pressure holding performance of the sample inlet of the fluid valve 6 meets the requirements.

[0042] As for the pressure maintaining performance of the sample outlet of the fluid valve 6, the second reversing valve 5 is adjusted to the second state, and the pressure maintaining port of the second reversing valve 5 is pressurized by the fluid sample pressurizing device 1. The fluid sample acts on the sample outlet of the fluid valve 6 through the pressure maintaining port of the second reversing valve 5 and the second outlet of the second reversing valve 5. At this time, the pressure collection unit collects the pressure data acting on the sample outlet of the fluid valve 6. If the pressure data does not decrease within the set pressure maintaining time, it means that the pressure maintaining performance of the sample outlet of the fluid valve 6 meets the requirements.

[0043] This embodiment achieves the purpose of testing the pressure maintaining performance of the oil inlet and the oil outlet in one assembly by adjusting the state of the second reversing valve 5, thereby greatly improving the test efficiency compared to the prior art that can only test the oil inlet or the oil outlet in one assembly.

[0044] In summary, by adjusting the states of the first reversing valve 4 and the second reversing valve 5 , the present embodiment can test the four ports of the fluid valve 6 in one assembly, which greatly saves the time of testing the fluid valve 6 and improves the efficiency of testing the fluid valve 6 .

[0045] In specific implementation, for example, the first reversing valve 4 is a three-position four-way reversing valve, the pressure oil pressing device 2 is connected to the pressure oil port of the three-position four-way reversing valve through a pressure oil pipeline, the pressure oil pressing device 2 is connected to the return oil port of the three-position four-way reversing valve through a return oil pipeline, the first oil outlet of the three-position four-way reversing valve is connected to the first control port of the fluid valve 6, and the second oil outlet of the three-position four-way reversing valve is connected to the second control port of the fluid valve 6. When the three-position four-way reversing valve is in the left position, the pressure oil port (P port) of the three-position four-way reversing valve is connected to the first oil outlet (B port), and the return oil port (T port) of the three-position four-way reversing valve is connected to the second oil outlet (A port). When the three-position four-way reversing valve is in the right position, the pressure oil port (P port) of the three-position four-way reversing valve is connected to the second oil outlet (A port), and the return oil port (T port) of the three-position four-way reversing valve is connected to the first oil outlet (B port).

[0046] This setting can realize the test of whether the on state and the off state of the fluid valve 6 can be switched normally by controlling the three-position four-way reversing valve.

[0047] Among them, the first oil outlet of the first reversing valve 4 is connected to one end of the first pressure oil pressure pipeline 10, the second oil outlet of the first reversing valve 4 is connected to one end of the second pressure oil pressure pipeline 11, and the other ends of the first pressure oil pressure pipeline 10 and the second pressure oil pressure pipeline 11 are both connected with plugs; the first pressure oil pressure pipeline 10 is connected to a plurality of first pressure oil branch pipelines, and the second pressure oil pressure pipeline 11 is connected to a plurality of second pressure oil branch pipelines, and the number of the first pressure oil branch pipelines and the second pressure oil branch pipelines are equal, each first pressure oil branch pipeline is respectively connected to the first control port of a fluid valve 6, and each second pressure oil branch pipeline is respectively connected to the second control port of a fluid valve 6.

[0048] The arrangement of this embodiment achieves the purpose of being able to simultaneously test whether multiple fluid valves 6, for example, 10, can switch normally.

[0049] During the specific test, for the fluid valve 6 in the cut-off state, the first reversing valve 4 is adjusted to the first state, and the pressure oil pressing device 2 outputs the pressure oil to the outside. The pressure oil output by the pressure oil pressing device 2 acts on the first control port of each fluid valve 6 through the pressure oil port, the first oil outlet, the first pressure oil pressing pipeline 10 and each first pressure oil branch pipeline of the first reversing valve 4. At the same time, the pressure oil in the second control port of the fluid valve 6 is returned to the pressure oil pressing device 2 through the second pressure oil branch pipeline, the second pressure oil pressing pipeline 11, the second oil outlet and the return oil port of the first reversing valve 4. Correspondingly, for any fluid valve 6, if the fluid valve 6 is in a normal state, the fluid valve 6 will change from cut-off to conduction.

[0050] For the fluid valve 6 in the on state, the first reversing valve 4 is adjusted to the second state, and the pressure oil pressing device 2 outputs the pressure oil to the outside. The pressure oil output by the pressure oil pressing device 2 acts on the second control port of each fluid valve 6 through the pressure oil port and the second oil outlet of the first reversing valve 4, the second pressure oil pressing pipeline 11 and each second pressure oil branch pipeline. At the same time, the pressure oil in the first control port of the fluid valve 6 is returned to the pressure oil pressing device 2 through the first pressure oil branch pipeline, the first pressure oil pressing pipeline 10, the first oil outlet and the return oil port of the first reversing valve 4. Correspondingly, for any fluid valve 6, if the fluid valve 6 is in a normal state, the fluid valve 6 will change from on to off.

[0051] The second reversing valve 5 is a three-position three-way reversing valve, which has a pressure port (P port), a first outlet (A port) and a second outlet (B port), wherein the fluid sample pressure device 1 is connected to the pressure port of the three-position three-way reversing valve through a fluid pipeline 7, the first outlet of the three-position three-way reversing valve is connected to the sample inlet of the fluid valve 6, and the second outlet of the three-position three-way reversing valve is connected to the sample outlet of the fluid valve 6. When the three-position three-way reversing valve is in the left position, the pressure port (P port) of the three-position three-way reversing valve is connected to the first outlet (A port), and when the three-position three-way reversing valve is in the right position, the pressure port (P port) of the three-position three-way reversing valve is connected to the second outlet (B port).

[0052] The pressure data acquisition unit includes a pressure sensor arranged on the fluid pipeline 7, and the pressure sensor is connected to a display unit 12, and the display unit 12 is used to display the corresponding pressure value.

[0053] The pressure sensor is connected to the display unit 12 wirelessly, and the display unit 12 is used to display the corresponding pressure value and / or generate a pressure curve for the convenience of analysis and archiving by engineers.

[0054] Among them, the first outlet of the second reversing valve 5 is connected to one end of the first fluid pressure pipeline 8, the second outlet of the second reversing valve 5 is connected to one end of the second fluid pressure pipeline 9, and the other ends of the first fluid pressure pipeline 8 and the second fluid pressure pipeline 9 are both connected with plugs; the first fluid pressure pipeline 8 is connected to a plurality of first fluid branch pipelines, and the second fluid pressure pipeline 9 is connected to a plurality of second fluid branch pipelines, and the number of first fluid branch pipelines and second fluid branch pipelines is equal, each first fluid branch pipeline is respectively connected to the sample inlet of a fluid valve 6, and each second fluid branch pipeline is respectively connected to the sample outlet of a fluid valve 6.

[0055] The arrangement of this embodiment achieves the purpose of being able to test the pressure-maintaining performance of multiple fluid valves 6 at the same time.

[0056] During the specific test, taking the second reversing valve 5 in the first state as an example, the fluid valve 6 is adjusted to the cut-off state, the plug at the other end of the second fluid pressure-pressing pipeline 9 is removed, and then the pressure-pressing port of the second reversing valve 5 is pressurized through the fluid sample pressure-pressing device 1. The fluid sample acts on the sample inlet of each fluid valve 6 through the pressure-pressing port of the second reversing valve 5, the first outlet of the second reversing valve 5, the first fluid pressure-pressing pipeline 8 and each first fluid branch pipeline. At this time, the pressure acquisition unit collects the pressure data acting on the sample inlet of the fluid valve 6. If the pressure data does not decrease within the set pressure-holding time, it means that the pressure-holding performance of the sample inlet of each fluid valve 6 meets the requirements; if the pressure data decreases, it means that there are fluid valves 6 that do not meet the pressure-holding performance. In the next step of testing, the fluid valves 6 that do not meet the pressure-holding performance can be found. As for the pressure-holding performance of the sample outlet of the fluid valve 6, the principle is the same as above, so it will not be repeated here.

[0057] Each first fluid branch pipeline is provided with a first stop valve 14 ; each second fluid branch pipeline is provided with a second stop valve.

[0058] The first stop valve 14 is configured to control the on / off of the corresponding first fluid branch pipeline, and the second stop valve is configured to control the on / off of the corresponding second fluid branch pipeline. By adjusting the states of the first stop valve 14 and the second stop valve, the pressure maintaining performance of a single or multiple fluid valves 6 can be tested, thereby determining which one or several of a batch of fluid valves 6 do not meet the pressure maintaining performance.

[0059] Among them, Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the fluid valve 6 testing system also includes a base 13, on which a mounting hole corresponding to the fluid valve 6 is provided, and on which corresponding through holes connecting the first oil outlet of the first reversing valve 4 and the first control port of the fluid valve 6, the second oil outlet of the first reversing valve 4 and the second control port of the fluid valve 6, the first outlet of the second reversing valve 5 and the sample inlet of the fluid valve 6, the second outlet of the second reversing valve 5 and the sample outlet of the fluid valve 6 are provided.

[0060] The arrangement of the base 13 in this embodiment can facilitate the installation of the fluid valve 6 on the base 13 for testing. In a specific implementation, the sizes of the installation holes on the base 13 can be different, so as to facilitate the installation of multiple fluid valves 6 of the same size.

[0061] Safety protection baffles are provided at the pressure oil pressing device 2, the fluid sample pressing device 1 and the base 13. The provision of the safety protection baffles in this embodiment can avoid the safety risks caused by high pressure leakage at the connection port.

[0062] The fluid valve 6 testing system of this embodiment can complete the testing of the first control port, the second control port, the oil inlet and the oil outlet in one installation through the setting of the first reversing valve 4 and the second reversing valve 5. It can realize the control of multiple fluid valves 6 in one installation, thereby greatly saving the testing time and improving the testing efficiency.

[0063] The fluid valve 6 testing system of this embodiment can detect pressure changes in real time through the wireless connection between the pressure gauge 3 and the display unit 12 so as to record the pressure data.

[0064] The fluid valve 6 testing system of this embodiment can avoid the safety risks caused by high-pressure leakage at the connection port by setting a safety protection baffle.

[0065] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0066] In addition, the terms "one", "two", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0067] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A fluid valve testing system, characterized in that: It includes a pressure oil pressure device, a first reversing valve, a fluid sample pressure device, a second reversing valve and a pressure data acquisition unit, wherein: The pressure oil pressing device is connected to the pressure oil port of the first reversing valve through a pressure oil pipeline, the pressure oil pressing device is connected to the return oil port of the first reversing valve through a return oil pipeline, the first oil outlet of the first reversing valve and the second oil outlet of the first reversing valve are respectively connected to the first control port and the second control port of the fluid valve, the first reversing valve has a first state in which the pressure oil port is connected to the first oil outlet and the return oil port is connected to the second oil outlet, and a second state in which the pressure oil port is connected to the second oil outlet and the return oil port is connected to the first oil outlet; The pressure oil pressure device is used to pressurize the first control port and the second control port of the fluid valve through the first reversing valve to test whether the fluid valve can be turned on and off; The fluid sample pressure device is connected to the pressure port of the second reversing valve through a fluid pipeline, the first outlet of the second reversing valve is connected to the sample inlet of the fluid valve, and the second outlet of the second reversing valve is connected to the sample outlet of the fluid valve; the second reversing valve has a first state in which the pressure port is connected to the first outlet, and a second state in which the pressure port is connected to the second outlet; The fluid sample pressurizing device is used to pressurize the sample inlet and sample outlet of the fluid valve respectively through the second reversing valve, and the pressure data acquisition unit is used to acquire corresponding pressure data to determine the pressure maintaining performance of the fluid valve according to the pressure data.

2. The fluid valve testing system according to claim 1, characterized in that: The first reversing valve is a three-position four-way reversing valve.

3. The fluid valve testing system according to claim 1, characterized in that: The first oil outlet of the first reversing valve is connected to one end of the first pressure oil pressure pipeline, the second oil outlet of the first reversing valve is connected to one end of the second pressure oil pressure pipeline, and the other ends of the first pressure oil pressure pipeline and the second pressure oil pressure pipeline are both connected with plugs; The first pressure oil pressurizing pipeline is connected to a plurality of first pressure oil branch pipelines, and the second pressure oil pressurizing pipeline is connected to a plurality of second pressure oil branch pipelines. The number of the first pressure oil branch pipelines and the second pressure oil branch pipelines are equal. Each of the first pressure oil branch pipelines is respectively connected to a first control port of the fluid valve, and each of the second pressure oil branch pipelines is respectively connected to a second control port of the fluid valve.

4. The fluid valve testing system according to claim 1, characterized in that: The second reversing valve is a three-position three-way reversing valve.

5. The fluid valve testing system according to claim 1, characterized in that: The pressure data acquisition unit includes a pressure sensor disposed on the fluid pipeline. The pressure sensor is connected to a display unit, and the display unit is used to display a corresponding pressure value.

6. The fluid valve testing system according to claim 1, characterized in that: The first outlet of the second reversing valve is connected to one end of the first fluid pressure pipeline, the second outlet of the second reversing valve is connected to one end of the second fluid pressure pipeline, and the other ends of the first fluid pressure pipeline and the second fluid pressure pipeline are both connected to plugs; The first fluid pressure pipeline is connected to a plurality of first fluid branch pipelines, and the second fluid pressure pipeline is connected to a plurality of second fluid branch pipelines. The number of the first fluid branch pipelines and the second fluid branch pipelines are equal. Each of the first fluid branch pipelines is respectively connected to a sample inlet of the fluid valve, and each of the second fluid branch pipelines is respectively connected to a sample outlet of the fluid valve.

7. The fluid valve testing system according to claim 6, characterized in that: Each of the first fluid branch pipelines is respectively provided with a first stop valve.

8. The fluid valve testing system according to claim 6, characterized in that: Each of the second fluid branch pipelines is respectively provided with a second stop valve.

9. The fluid valve testing system according to claim 1, characterized in that: The fluid valve testing system also includes a base, on which is provided a mounting hole corresponding to the fluid valve, and on which is provided corresponding through holes connecting the first oil outlet of the first reversing valve and the first control port of the fluid valve, the second oil outlet of the first reversing valve and the second control port of the fluid valve, the first outlet of the second reversing valve and the sample inlet of the fluid valve, the second outlet of the second reversing valve and the sample outlet of the fluid valve.

10. The fluid valve testing system according to claim 9, characterized in that: The pressure oil pressing device, the fluid sample pressing device and the base are all provided with safety protection baffles.

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