Hydraulic pressure and air pressure comprehensive test equipment and test system

Abstract

The utility model provides hydraulic pressure and air pressure comprehensive test equipment and a test system, the hydraulic pressure and air pressure comprehensive test equipment comprises a hydraulic control unit, an air pressure control unit, hoses and a test water tank used for placing a tested piece, and the hydraulic control unit and the air pressure control unit are respectively connected with the tested piece through the hoses; a hydraulic pipeline of the hydraulic control unit is provided with a first safety relief branch, and an air pressure pipeline of the air pressure control unit is provided with a second safety relief branch; after the hydraulic test is completed, water can be discharged by communicating the tested piece with the second safety discharge branch; and after the air pressure test is finished, the tested piece and the first safety relief branch are communicated to deflate. The hydraulic connection device solves the technical problem that large potential safety hazards exist after air pressure test equipment is connected due to the fact that hydraulic residual pressure of a hydraulic hose easily exists in the process of dismantling existing hydraulic connection equipment for hydraulic and air pressure test operation of a tested piece.

Description

Technical Field

[0001] The utility model relates to the technical field of precision instrument testing equipment, in particular to a hydraulic and pneumatic comprehensive test equipment and a test system. Background Technique

[0002] At present, for the equipment in the petroleum industry and the aerospace industry, the performance and quality requirements for their components are often more stringent than those for general civilian use, so as to avoid mistakes in oil extraction and rocket launch. Among them, the requirements for the strength and sealing performance of high-pressure fluid pipe fittings and valves are also very strict. For this reason, before being put into production and use, it is necessary to complete the strength test and sealing test of the fluid pipe fittings and valves to be tested through a set of hydraulic test equipment and a set of airtight test equipment respectively; based on the existing test equipment, when the test piece to be tested finishes the hydraulic test and switches to the pneumatic test, the operator needs to manually remove the test piece to be tested and the connecting hydraulic test hose from the hydraulic test bench, and then install and connect the test piece to be tested and the pneumatic test hose to enter the pneumatic test. If the hydraulic pressure is not completely discharged and there is residual hydraulic pressure in the hydraulic hose during this process, it may pose risks and harm to the operator. Content of the Utility Model

[0003] A technical problem to be solved by the utility model is: due to the existence of residual hydraulic pressure in the hydraulic hose during the removal process of the hydraulic connection equipment for the existing test piece in the hydraulic and pneumatic test operations, there is a large potential safety hazard after connecting to the pneumatic test equipment.

[0004] To solve the above technical problem, an embodiment of the utility model provides a hydraulic and pneumatic comprehensive test equipment.

[0005] The hydraulic and pneumatic comprehensive test equipment includes: a hydraulic control unit, a pneumatic control unit, a hose, and a test water tank for placing the test piece to be tested. The hydraulic control unit and the pneumatic control unit are respectively connected to the test piece to be tested through the hose; a first safety relief branch is provided on the hydraulic pipeline of the hydraulic control unit, and a second safety relief branch is provided on the pneumatic pipeline of the pneumatic control unit; after the hydraulic test is completed, water can be drained by connecting the test piece to be tested and the second safety relief branch; after the pneumatic test is completed, air can be released by connecting the test piece to be tested and the first safety relief branch.

[0006] The hydraulic and pneumatic comprehensive test equipment provided by the utility model includes a hydraulic control unit, a pneumatic control unit, and a test water tank for placing the test piece to be measured. The hydraulic control unit and the pneumatic control unit are respectively connected to the test piece through hoses. By setting a first safety relief branch on the hydraulic pipeline of the hydraulic control unit and a second safety relief branch on the pneumatic pipeline of the pneumatic control unit, it is realized that after the hydraulic test is completed, water can be drained by connecting the test piece and the second safety relief branch, and after the gas test is completed, air can be released by connecting the test piece and the first safety relief branch. Thus, a set of equipment integrates the functions of hydraulic and pneumatic tests, reduces costs, and reduces the occupied space. At the same time, during the intermediate process of switching from the hydraulic test to the pneumatic test for the whole test, there is no need for the operator to manually replace the pipelines and connectors, and the inlet and outlet directions are automatically adjusted after switching from the hydraulic test to the pneumatic test, and the pressure relief is complete and the operation is safe. Furthermore, it solves the technical problem that there is a large safety hazard after connecting to the pneumatic test equipment due to the residual hydraulic pressure in the hydraulic hose during the removal process of the existing hydraulic connection equipment for the hydraulic and pneumatic test operations of the test piece to be measured.

[0007] Preferably, the hydraulic control unit includes an automatic water storage device, a water inlet valve, a high-pressure liquid pump, and an automatic water outlet valve arranged in sequence on the hydraulic pipeline, and a first safety relief branch is provided between the automatic water outlet valve and the hose.

[0008] Preferably, the hydraulic control unit further includes a hydraulic safety valve arranged between the high-pressure liquid pump and the automatic water outlet valve, and a hydraulic pressure sensor arranged on the side of the hydraulic pipeline connecting the hose.

[0009] Preferably, the water storage device includes an automatic water inlet valve, a water tank, and a water tank level gauge.

[0010] Preferably, an automatic hydraulic pressure relief valve is provided on the first safety relief branch.

[0011] Preferably, the pneumatic control unit includes a manual air inlet valve, an input pressure transmitter, a high-pressure air pump, a pre-pressure reduction pressure transmitter, a pressure reducing valve, an automatic output valve, and an output pressure transmitter. A second safety relief branch is provided between the output pressure transmitter and the hose.

[0012] Preferably, a first pneumatic safety valve is provided between the high-pressure air pump and the pre-pressure reduction pressure transmitter, and a second pneumatic safety valve is provided between the output pressure transmitter and the second safety relief branch.

[0013] Preferably, the second safety relief branch includes a first branch including an automatic valve and a pneumatic pressure relief valve with a controllable rate and a second branch including an automatic pressure relief valve, and the first branch and the second branch are connected in parallel.

[0014] Preferably, the hydraulic and pneumatic comprehensive test equipment includes an acquisition and monitoring unit arranged outside the hydraulic control unit, pneumatic control unit and test water tank. The acquisition and monitoring unit includes a display, a camera and a data table.

[0015] The present utility model also provides a test system, and the test system includes the hydraulic and pneumatic comprehensive test equipment according to any one of the above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic structural diagram of the hydraulic and pneumatic comprehensive test equipment disclosed in the embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a schematic diagram of the liquid inlet and outlet directions during a hydraulic test;

[0019] Figure 3 is Figure 1 a schematic diagram of the gas inlet and outlet directions during a pneumatic test.

[0020] Description of the reference numerals:

[0021] 1. Pneumatic control unit; 101. Manual air inlet valve; 102. Input pressure transmitter; 103. High-pressure air pump; 104. First pneumatic safety valve; 105. Pressure transmitter before pressure reduction; 106. Pressure reducing valve; 107. Automatic output valve; 108. Output pressure transmitter; 109. Second pneumatic safety valve; 110. Automatic valve; 111. Pneumatic pressure relief valve; 112. Automatic pressure relief valve; 2. Hydraulic control unit; 201. Automatic water inlet valve; 202. Water tank level gauge; 203. Water tank; 204. Water inlet valve; 205. High-pressure liquid pump; 206. Hydraulic safety valve; 207. Automatic water outlet valve; 208. Automatic hydraulic pressure relief valve; 209. Hydraulic pressure sensor; 3. Test water tank; 4. Hose; 5. Pneumatic pipeline; 501. Second safety relief branch; 5011. First branch; 5012. Second branch; 6. Hydraulic pipeline; 601. First safety relief branch; 7. Test piece; 8. Acquisition and monitoring unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes in detail the embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The detailed descriptions and drawings of the following embodiments are used to exemplarily illustrate the principles of the present utility model, but cannot be used to limit the scope of the present utility model. The present utility model can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.

[0023] The present utility model provides these embodiments to make the present utility model thorough and complete, and to fully express the scope of the present utility model to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values described in these embodiments should be interpreted as merely exemplary, rather than as limitations.

[0024] It should be noted that in the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc. are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0025] In addition, the "first", "second" and similar terms used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Terms such as "including" or "comprising" mean that the elements before the term cover the elements listed after the term, and do not exclude the possibility of also covering other elements.

[0026] It also should be noted that in the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected" and "coupled" 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 directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0027] All terms used in this utility model have the same meanings as those understood by those of ordinary skill in the art to which this utility model pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, etc., should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0028] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.

[0029] As Figures 1 to 3 As shown, the hydraulic and pneumatic comprehensive test equipment provided by this utility model includes a hydraulic control unit 2, a pneumatic control unit 1, a hose 4, and a test water tank 3 for placing the test piece 7. The hydraulic control unit 2 and the pneumatic control unit 1 are respectively connected to the test piece 7 through the hose 4. A first safety relief branch 601 is provided on the hydraulic pipeline 6 of the hydraulic control unit 2, and a second safety relief branch 501 is provided on the pneumatic pipeline 5 of the pneumatic control unit 1. Among them, after the hydraulic test is completed, water can be drained by connecting the test piece 7 and the second safety relief branch 501, and after the pneumatic test is completed, air can be released by connecting the test piece 7 and the first safety relief branch 601. It should be noted that when performing the hydraulic test, the test water tank 3 is emptied of water, so that when liquid leakage occurs in the test piece 7 during the hydraulic test, the overflowing water can be discharged into the test water tank.

[0030] The hydraulic and pneumatic comprehensive test equipment provided by this utility model includes a hydraulic control unit 2, a pneumatic control unit 1, and a test water tank 3 for placing the test piece 7. The hydraulic control unit 2 and the pneumatic control unit 1 are respectively connected to the test piece 7 through the hose 4. By providing a first safety relief branch 601 on the hydraulic pipeline 6 of the hydraulic control unit 2 and a second safety relief branch 501 on the pneumatic pipeline 5 of the pneumatic control unit 1, it is realized that after the hydraulic test is completed, water can be drained by connecting the test piece 7 and the second safety relief branch 501, and after the gas test is completed, air can be released by connecting the test piece 7 and the first safety relief branch 601. Thus, a set of equipment integrates the functions of hydraulic and pneumatic tests, reduces costs, and reduces the floor space. At the same time, during the intermediate process of switching from the hydraulic test to the pneumatic test in the whole test, there is no need for the operator to manually replace the pipeline and joints. After switching from the hydraulic test to the pneumatic test, the inlet and outlet directions are automatically adjusted, and the pressure relief is complete and the operation is safe. Furthermore, it solves the technical problem that there is often residual hydraulic pressure in the hydraulic hose during the removal of the existing hydraulic connection equipment for the hydraulic and pneumatic test operations of the test piece, resulting in a large safety hazard after connecting to the pneumatic test equipment.

[0031] In an optional embodiment of the present utility model, the hydraulic control unit 2 includes a water storage device, a water inlet valve 204, a high-pressure liquid pump 205, and an automatic water outlet valve 207 disposed on the hydraulic pipeline 6. A first safety relief branch 601 is provided between the automatic water outlet valve 207 and the hose 4. It should be noted that the water inlet valve 204 is preferably a manual water inlet valve to facilitate the control of the water inlet for starting the hydraulic test. The water entering through the water inlet valve 204 reaches the preset water pressure required for the test under the action of the high-pressure liquid pump 205, and then flows out through the automatic water outlet valve 207 until it enters the test piece 7 through the hose 4.

[0032] To ensure the safety and controllability of the hydraulic test, in a further optional embodiment of the present utility model, the hydraulic control unit 2 further includes a hydraulic safety valve 206 disposed between the high-pressure liquid pump 205 and the automatic water outlet valve 207, and a hydraulic pressure sensor 209 disposed on one side of the hydraulic pipeline 6 connecting the hose 4. The setting of the hydraulic safety valve 206 can effectively control the water outlet during the hydraulic test. By setting the hydraulic pressure sensor 209, the hydraulic pressure in the hydraulic pipeline 6 can be observed in real time to ensure the normal progress of the test.

[0033] In an optional embodiment of the present utility model, the water storage device includes an automatic water inlet valve 201, a water tank 203, and a water tank level gauge 202. The automatic water inlet valve 201 is connected to the water source input port, and the automatic water inlet valve 201 can be used in conjunction with the water tank level gauge 202 to ensure that the water level in the water tank 203 is always at a preset height. The setting of the water storage device can ensure that there is sufficient water flow when starting the hydraulic test to ensure that it flows into the high-pressure liquid pump 205 through the water inlet valve 204, so as to quickly and efficiently enter the hydraulic test, avoiding the influence of uncontrollable environmental factors on the hydraulic test and even causing errors.

[0034] In an optional embodiment of the present utility model, an automatic hydraulic pressure relief valve 208 is provided on the first safety relief branch 601. After the pneumatic test is completed, the test piece 7 and the first safety relief branch 601 can be connected, so that the gas flows from the high-pressure position to the low-pressure position, as Figure 3 shown. At this time, the gas entering the first safety relief branch 601 is released through the automatic hydraulic pressure relief valve 208, improving the efficiency of gas test pressure release while ensuring the airtightness of the equipment and enhancing the safety of the overall equipment. It should be noted that Figure 3 the test bench in

[0035] During the actual hydraulic test process, clean test water is injected from the water source inlet, and through the automatic water inlet valve 201, it is injected into the water tank 203 for storage. When conducting the hydraulic test, the manual water inlet valve 204 is opened, and then the high-pressure liquid pump 205 raises the water pressure to the required pressure. Through the opened automatic water outlet valve 207, it is filled into the test piece 7 placed in the test water tank 3, enabling the test piece 7 to conduct a hydraulic pressure holding test. The first safety relief branch 601 and the pressure relief branch after pressure holding set in the hydraulic control unit 2 enable the system to automatically release pressure when overpressure occurs, eliminating the hidden danger of overpressure. The pressure relief branch can control the required pressure relief rate.

[0036] In an optional embodiment of the present utility model, the air pressure control unit 1 includes a manual air inlet valve 101, an input pressure transmitter 102, a high-pressure air pump 103, a pre-pressure reduction pressure transmitter 105, a pressure reducing valve 106, an automatic output valve 107, and an output pressure transmitter 108. A second safety relief branch 501 is provided between the output pressure transmitter 108 and the hose 4. The manual air inlet valve 101 is connected to the air source inlet, which can effectively control when to start the air pressure test. The sequential arrangement of the input pressure transmitter 102, the high-pressure air pump 103, the pre-pressure reduction pressure transmitter 105, the pressure reducing valve 106, the automatic output valve 107, and the output pressure transmitter 108 processes the gas entering the air pressure pipeline 5 to make it meet the air pressure conditions for entering the test piece 7 via the hose 4.

[0037] In order to improve the safety of the air pressure test, in an optional embodiment of the present utility model, a first air pressure safety valve 104 is provided between the high-pressure air pump 103 and the pre-pressure reduction pressure transmitter 105 to release air and reduce pressure through the first air pressure safety valve 104 in the case of relatively high air pressure. Similarly, in order to further improve the safety of equipment operation, a second air pressure safety valve 109 is provided on the output pressure transmitter 108 and the second safety relief branch 501.

[0038] In an optional embodiment of the present utility model, the second safety relief branch 501 includes a first branch 5011 including an automatic valve 110 and a rate-controllable air pressure relief valve 111, and a second branch 5012 including an automatic pressure relief valve 112. The first branch 5011 and the second branch 5012 are in parallel to facilitate the selection of the pressure relief branch according to actual requirements.

[0039] During the actual pneumatic pressure test process, test gas media such as compressed air or nitrogen pass through the gas source inlet, through the opened manual intake valve 101, and enter the high-pressure air pump 103. After the gas source pressure is raised to the required pressure, it passes through the pressure reducing valve 106 and the automatic output valve 107, and is filled into the test piece 7 placed in the test water tank 3, so that the test piece 7 undergoes a pneumatic pressure holding test. The second safety relief branch 501 and the pressure relief branch (such as the first branch 5011) provided in the pneumatic control unit 1 enable the system to automatically release pressure when overpressure occurs, eliminating the hidden danger of overpressure. The pressure relief branch can control the required pressure relief rate. Among them, the input pressure transmitter 102, the pre-pressure reducing pressure transmitter 105, the output pressure transmitter 108, the first pneumatic safety valve 104, and the second pneumatic safety valve 109 automatically open to release pressure when the system pneumatic pressure exceeds the limit, protecting the pneumatic system.

[0040] In an optional embodiment of the present utility model, the hydraulic and pneumatic comprehensive test equipment includes an acquisition and monitoring unit 8 arranged outside the hydraulic control unit 2, the pneumatic control unit 1, and the test water tank 3. The acquisition and monitoring unit 8 includes a display, a camera, and a data table. Specifically, during use, the camera is installed beside the workpiece, and the operator can monitor the workpiece during the hydraulic test or pneumatic test through the display, and can observe its pressure holding situation at any time. The operator is away from the high-pressure workpiece environment, ensuring the safety of the test.

[0041] The setting of the second pneumatic safety valve 109 can connect the test piece 7 with the second safety relief branch 501 after the hydraulic test, enabling it to flow from the side with higher hydraulic pressure to the side with lower hydraulic pressure while ensuring the airtightness of the overall equipment. For example, Figure 2 as shown, that is, it flows into the second safety relief branch 501 and flows out through the second pneumatic safety valve 109. It should be noted that Figure 2 the test bench in refers to the unit and device for hydraulic test in the hydraulic and pneumatic comprehensive test equipment except for the test piece 7 and the hose 4, and has no other reference or meaning.

[0042] The use process of the hydraulic and pneumatic comprehensive test equipment provided by the present utility model during actual operation is as follows:

[0043] Debugging conditions: the hydraulic test pressure is 1.5 - 160 MPa, the pneumatic test pressure is 0 - 120 MPa, the rising and falling pressure rates are stably controlled, the pressurization rate meets 0 - 5 MPa / s, and the pressure reduction rate does not exceed 2 MPa / s.

[0044] After the test piece 7 is placed in the test water tank 3 and fixed, the hydraulic test is first carried out. The process is as follows:

[0045] 1. Water injection: Inject normal pressure water into the test piece 7 through the water inlet valve 204 and the hydraulic pipeline 6;

[0046] 2. Exhaust: Fill the test piece 7 with water and evacuate the internal air.

[0047] 3. Boost pressure: Perform a pressure boost operation through the high-pressure liquid pump 205. Under the action of the electro-pneumatic proportional valve, slowly increase the driving gas pressure to control the pressure boost rate.

[0048] 4. Hold pressure: After reaching the test pressure, the system stops boosting pressure and starts timing for holding pressure from the current moment.

[0049] 5. Release pressure: After the pressure holding is completed, open the automatic valve 110 at the rear end of the pneumatic control unit 1 and activate the pneumatic pressure relief valve 111 with a controllable rate to drain all the water in the test piece 7 and the valves of the adjacent auxiliary pipelines at the desired pressure release rate.

[0050] After the hydraulic test is completed, there is no need for the operator to disassemble the conduit. The airtightness test can be directly carried out through the automatic control system.

[0051] The basic process of the pneumatic test is as follows:

[0052] 1. Blow out residual water: Blow out the residual water in the hose 4 through the pipeline of the pneumatic control unit 1.

[0053] 2. Boost pressure: First, boost the pressure through the high-pressure air pump 103, then slowly increase the driving gas pressure under the action of the electro-pneumatic proportional valve, and slowly adjust the pressure of the pneumatically controlled pressure reducing valve 106 to control the pressure boost rate.

[0054] 3. Hold pressure: After reaching the test pressure, the system stops boosting pressure and starts timing for holding pressure from the current moment.

[0055] 4. Release pressure: After reaching the set pressure holding time, activate the automatic hydraulic pressure relief valve 208, and the system realizes slow pressure release.

[0056] The parameters of the whole process are automatically saved and can be exported. The test process is covered by video monitoring throughout. In case of special circumstances, the operator can press the emergency stop button, and the system will perform emergency pressure release.

[0057] The existing detection equipment has the following problems:

[0058] 1. The pressure control accuracy of hydraulic and pneumatic systems is relatively low: The pressure accuracy of reaching the target hydraulic pressure and target pneumatic pressure is not high, only reaching 100% ± 5 - 10%.

[0059] 2. It cannot control the pressure boost and pressure reduction rates of hydraulic and pneumatic systems.

[0060] 3. There are potential safety hazards: The maximum test pressure for hydraulic and pneumatic tests exceeds 100 MPa. During the intermediate process of switching from hydraulic test to pneumatic test, it is necessary to disassemble the hydraulic hoses and the test piece, and connect the pneumatic hoses and the test piece. If there is residual pressure in the hoses and it has not been depressurized to normal pressure, operating at this time can easily cause casualties.

[0061] 4. High cost: Two sets of independent equipment, namely hydraulic test equipment and pneumatic test equipment, are required to separately complete the strength test and airtightness test of the test piece.

[0062] In contrast, the advantages of the hydraulic and pneumatic comprehensive test equipment provided by the present utility model are as follows:

[0063] 1. The hydraulic test equipment and the pneumatic test equipment are designed as a set of equipment, which reduces costs and shrinks the floor space. Moreover, when switching from hydraulic test to pneumatic test, there is no need to perform operations such as disassembling the test piece and connecting hoses during the intermediate process. Instead, it only needs to start automatic purging of the test piece and connecting pipelines to remove moisture, which not only solves the potential safety risks during the intermediate process of test conversion, saves the manpower and material resources for the intermediate disassembly process during test conversion, but also reduces the cost of test equipment.

[0064] 2. The hydraulic and pneumatic lifting and lowering rates are indirectly controlled by controlling the driving gas through an electro-hydraulic proportional valve. Through the automatic control system, the control accuracy can reach 0.5%. Through actual test results, it is found that the rising and falling rates can be controlled at any value within the range of 0 - 2 MPa / s, improving the control accuracy of the overall equipment to 1%.

[0065] 3. During the intermediate process of switching from hydraulic test to pneumatic test in the whole test, there is no need for the operator to manually replace pipelines and connectors. At the same time, the inlet and outlet directions are automatically adjusted after switching from hydraulic test to pneumatic test, avoiding the operator being in a high-pressure environment and improving the safety factor of the operation.

[0066] The present utility model provides a test system, which includes the hydraulic and pneumatic comprehensive test equipment according to any one of the above.

[0067] The hydraulic and pneumatic comprehensive test equipment of the test system provided by the present utility model includes a hydraulic control unit 2, a pneumatic control unit 1, and a test water tank 3 for placing a tested piece 7. The hydraulic control unit 2 and the pneumatic control unit 1 are respectively connected to the tested piece 7 through hoses 4. By providing a first safety relief branch 601 on the hydraulic pipeline 6 of the hydraulic control unit 2 and a second safety relief branch 501 on the pneumatic pipeline 5 of the pneumatic control unit 1, it is realized that after the hydraulic test is completed, water can be drained by connecting the tested piece 7 and the second safety relief branch 501, and after the gas test is completed, air can be released by connecting the tested piece 7 and the first safety relief branch 601. Thus, the functions of hydraulic and pneumatic tests are integrated by using a set of equipment, which reduces costs and shrinks the occupied space. At the same time, during the intermediate process of switching from the hydraulic test to the pneumatic test in the whole test, there is no need for the operator to manually replace the pipelines and connectors. After switching from the hydraulic test to the pneumatic test, the inlet and outlet directions are automatically adjusted, and the pressure relief is complete and the operation is safe. Furthermore, it solves the technical problem that there is a large safety hazard after connecting to the pneumatic test equipment due to the existence of residual hydraulic pressure in the hydraulic hose during the removal process of the existing hydraulic connection equipment for the hydraulic and pneumatic test operations of the tested piece.

[0068] So far, the embodiments of the present utility model have been described in detail. To avoid obscuring the concept of the present utility model, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0069] Although some specific embodiments of the present utility model have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for the purpose of illustration and not for the purpose of limiting the scope of the present utility model. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. A hydraulic and pneumatic comprehensive test equipment, characterized in that, The hydraulic and pneumatic comprehensive test equipment includes: a hydraulic control unit, a pneumatic control unit, a hose, and a test water tank for placing the test piece to be measured. The hydraulic control unit and the pneumatic control unit are respectively connected to the test piece through the hose; a first safety relief branch is provided on the hydraulic pipeline of the hydraulic control unit, and a second safety relief branch is provided on the pneumatic pipeline of the pneumatic control unit; after the hydraulic test is completed, water can be drained by connecting the test piece and the second safety relief branch; after the pneumatic test is completed, air can be released by connecting the test piece and the first safety relief branch.

2. The hydraulic and pneumatic comprehensive test equipment according to claim 1, characterized in that The hydraulic control unit includes an automatic water storage device, a water inlet valve, a high-pressure liquid pump, and an automatic water outlet valve that are sequentially arranged on the hydraulic pipeline. A first safety relief branch is provided between the automatic water outlet valve and the hose.

3. The hydraulic and pneumatic comprehensive test equipment according to claim 2, characterized in that, The hydraulic control unit further includes a hydraulic safety valve arranged between the high-pressure liquid pump and the automatic water outlet valve, and a hydraulic pressure sensor arranged on the side of the hydraulic pipeline connecting the hose.

4. The hydraulic and pneumatic comprehensive test equipment according to claim 2, characterized in that, The water storage device includes an automatic water inlet valve, a water tank, and a water tank level gauge.

5. The integrated hydraulic and pneumatic test equipment according to claim 1, wherein, An automatic hydraulic pressure relief valve is provided on the first safety relief branch.

6. The hydraulic and pneumatic comprehensive test equipment according to claim 1, characterized in that The pneumatic control unit includes a manual air inlet valve, an input pressure transmitter, a high-pressure air pump, a pre-pressure reduction pressure transmitter, a pressure reducing valve, an automatic output valve, and an output pressure transmitter. A second safety relief branch is provided between the output pressure transmitter and the hose.

7. The integrated hydraulic and pneumatic test equipment according to claim 6, characterized in that A first pneumatic safety valve is provided between the high-pressure air pump and the pre-pressure reduction pressure transmitter, and a second pneumatic safety valve is provided between the output pressure transmitter and the second safety relief branch.

8. The hydraulic and pneumatic comprehensive test equipment according to claim 1, characterized in that, The second safety relief branch includes a first branch containing an automatic valve and a pneumatic pressure relief valve with controllable rate and a second branch containing an automatic pressure relief valve. The first branch and the second branch are in parallel.

9. The integrated hydraulic and pneumatic test equipment according to claim 1, wherein, The hydraulic and pneumatic comprehensive test equipment includes an acquisition and monitoring unit arranged outside the hydraulic control unit, the pneumatic control unit, and the test water tank. The acquisition and monitoring unit includes a display, a camera, and a data table.

10. A test system, characterized in that, The test system includes the hydraulic and pneumatic comprehensive test equipment according to any one of claims 1 to 9.

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