Water pressure boosting pressure test device for test and inspection

Abstract

The invention provides a water pressure boosting and testing device for testing and inspection. The water pressure boosting and testing device comprises a high-pressure part, a low-pressure part and an output part, the high-pressure part can increase the pressure of the liquid medium conveyed by the liquid source to be higher than the preset pressure; the low-pressure part can increase the pressure of the liquid medium conveyed by the liquid source to be lower than the preset pressure; the input end of the output part is respectively connected with the output ends of the high-voltage part and the low-voltage part; the output part can detect the pressure of the liquid medium reaching the interior of the output part; when the pressure of the liquid medium in the output part is smaller than the preset pressure, the input end of the output part is communicated with the output end of the low-pressure part; when the pressure of the liquid medium in the output part is larger than the preset pressure, the input end of the output part communicates with the output end of the high-pressure part. While the pressurization range and the pressurization precision are improved, the pressurization efficiency is greatly improved, and the efficiency of water pressure test and inspection is further improved.

Description

Technical Field

[0001] This invention belongs to the field of testing and inspection technology, and specifically relates to a water pressure boosting test device for testing and inspection. Background Technology

[0002] In the petroleum industry, due to the specific working environment, it is necessary to test and inspect the equipment before use in order to ensure that each piece of equipment can operate normally. Among these tests, water pressure testing is one of the important indicators to ensure that the equipment can maintain normal operation in subsequent work.

[0003] Currently, water pressure testing of equipment is generally carried out by using a water pressure booster device to output a liquid medium at a specific pressure. However, because there are many pieces of equipment that need to be tested, and the pressure and flow rate of the liquid medium required by each piece of equipment are not the same, multiple water pressure boosters capable of outputting liquid media at different pressures are required, which makes the operation complicated and results in low testing efficiency.

[0004] Therefore, existing water pressure boosting devices are inefficient when performing water pressure tests on equipment. Summary of the Invention

[0005] To address the above problems, this invention proposes a water pressure boosting and testing device for testing and verification, comprising:

[0006] The high-pressure section is capable of increasing the pressure of the liquid medium supplied by the liquid source to a state higher than a preset pressure, so as to output a liquid medium with a pressure higher than the preset pressure.

[0007] The low-pressure section is capable of increasing the pressure of the liquid medium supplied by the liquid source to a state below a preset pressure, so as to output a liquid medium below the preset pressure.

[0008] The output section has its input terminals connected to the output terminals of the high-pressure section and the low-pressure section, respectively, so that liquid media output by the high-pressure section at a pressure higher than a preset pressure or liquid media output by the low-pressure section at a pressure lower than a preset pressure can reach the output section.

[0009] The output section is capable of detecting the pressure of the liquid medium arriving at the output section;

[0010] When the pressure of the liquid medium in the output section is less than the preset pressure, the input end of the output section is connected to the output end of the low-pressure section, and the liquid medium is pressurized through the low-pressure section.

[0011] When the pressure of the liquid medium in the output section is greater than the preset pressure, the input end of the output section is connected to the output end of the high-pressure section, and the liquid medium is pressurized through the high-pressure section.

[0012] In some specific embodiments, it also includes:

[0013] The controller connects the electrical connection terminals of the output section to the electrical connection terminals of the high-voltage section and the low-voltage section, respectively.

[0014] The controller can control the opening and closing of the high-pressure section and the low-pressure section based on the pressure detection result of the liquid medium in the output section.

[0015] In some specific embodiments, a one-way valve is provided between the output terminal of the high-pressure section and the input terminal of the output section;

[0016] Alternatively, a one-way valve may be provided between the output terminal of the low-pressure section and the input terminal of the output section;

[0017] Alternatively, a one-way valve may be provided between the output end of the high-pressure section and the output end of the low-pressure section and the input end of the output section, respectively.

[0018] In some specific embodiments, the output terminal of the high-voltage section is connected to a first relief valve to prevent the high-voltage section from overloading.

[0019] The output end of the low-pressure section is connected to a second overflow valve to prevent the low-pressure section from being overloaded.

[0020] In some specific embodiments, the high-voltage section includes:

[0021] A high-pressure pump capable of pressurizing a liquid medium;

[0022] A high-pressure circuit is provided, wherein the high-pressure pump is installed on the high-pressure circuit, one end of the high-pressure circuit is connected to the input end of the output unit, and the other end of the high-pressure circuit is connected to the output end of the liquid source.

[0023] In some specific embodiments, the low-pressure section includes:

[0024] A low-pressure pump capable of pressurizing a liquid medium;

[0025] A low-pressure circuit is provided, wherein the low-pressure pump is disposed on the low-pressure circuit, one end of the low-pressure circuit is connected to the input end of the output unit, and the other end of the low-pressure circuit is connected to the output end of the liquid source.

[0026] In some specific embodiments, the output unit includes:

[0027] An output circuit, wherein the input terminal of the output circuit is connected to the output terminal of the high-pressure section and the output terminal of the low-pressure section respectively, so as to output the pressurized liquid medium;

[0028] A detection circuit is connected to the middle of the output circuit to detect the pressure of the liquid medium in the output circuit.

[0029] In some specific embodiments, the detection circuit includes:

[0030] The first detection branch is equipped with a first pressure sensor, which can detect the pressure of the liquid medium that is higher than a preset pressure.

[0031] The second detection branch is equipped with a second pressure sensor, which can detect the pressure of the liquid medium that is lower than a preset pressure.

[0032] In some specific embodiments, the second detection branch is connected to a third overflow valve to prevent the second detection branch from being overloaded.

[0033] In some specific embodiments, the output terminal of the output circuit is connected to a pressure relief valve so that the liquid medium in the output circuit can be depressurized through the pressure relief valve.

[0034] The water pressure boosting and testing device of the present invention can increase the pressure of the liquid medium supplied by the liquid source to a state higher than a preset pressure through a high-pressure section, and can increase the pressure of the liquid medium supplied by the liquid source to a state lower than a preset pressure through a low-pressure section. The cooperation between the high-pressure and low-pressure sections improves the boosting range and accuracy. Simultaneously, when the pressure of the liquid medium in the output section is lower than the preset pressure, the low-pressure section is used first for boosting. At the lower pressure, the flow rate of the liquid medium through the low-pressure section is larger, thereby shortening the liquid medium supply time. When the pressure of the liquid medium in the output section is higher than the preset pressure, the high-pressure section is switched to boost the pressure, thus accurately boosting the liquid medium to the required pressure. While improving the boosting range and accuracy, the device also greatly improves the boosting efficiency, thereby improving the efficiency of water pressure testing and inspection.

[0035] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of a water pressure boosting test device for testing and verification is shown in an embodiment of the present invention.

[0038] In the diagram, 100 is the high-pressure section; 110 is the high-pressure pump; 120 is the high-pressure circuit; 121 is the first overflow valve; 200 is the low-pressure section; 210 is the low-pressure pump; 220 is the low-pressure circuit; 221 is the check valve; 222 is the second overflow valve; 300 is the output section; 310 is the output circuit; 311 is the pressure relief valve; 312 is the pressure holding valve; 320 is the detection circuit; 321 is the first detection branch; 3211 is the first pressure sensor; 322 is the second detection branch; 3221 is the second pressure sensor; 3222 is the detection valve; 3223 is the third overflow valve; 400 is the liquid source; 500 is the pneumatic circuit; 510 is the first pneumatic branch; 511 is the first valve; 520 is the second pneumatic branch; 521 is the second valve; and 530 is the proportional valve. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Reference Figure 1This invention provides a water pressure boosting and testing device for testing and verification, comprising: a high-pressure section 100, a low-pressure section 200, and an output section 300. The high-pressure section 100 can increase the pressure of the liquid medium supplied by the liquid source 400 to a state higher than a preset pressure, thereby outputting a liquid medium with a pressure higher than the preset pressure. The low-pressure section 200 can increase the pressure of the liquid medium supplied by the liquid source 400 to a state lower than a preset pressure, thereby outputting a liquid medium with a pressure lower than the preset pressure. The input terminal of the output section 300 is connected to the output terminals of both the high-pressure section 100 and the low-pressure section 200, so that either the liquid medium output by the high-pressure section 100 with a pressure higher than the preset pressure or the liquid medium output by the low-pressure section 200 with a pressure lower than the preset pressure can reach the output section 300. The output section 300 can detect the pressure of the liquid medium arriving at the output section 300. When the pressure of the liquid medium in the output section 300 is lower than the preset pressure, the input terminal of the output section 300 connects to the output terminal of the low-pressure section 200, thereby boosting the pressure of the liquid medium through the low-pressure section 200. When the pressure of the liquid medium in the output section 300 is greater than the preset pressure, the input end of the output section 300 is connected to the output end of the high pressure section 100, and the liquid medium is pressurized by the high pressure section 100.

[0041] Specifically, the input end of the high-pressure unit 100 is connected to the output end of the liquid source 400. The liquid source 400 can deliver liquid medium into the high-pressure unit 100, thereby pressurizing the liquid medium delivered into the high-pressure unit 100 to a state higher than the preset pressure. The output end of the high-pressure unit 100 is connected to the input end of the output unit 300, and the high-pressure unit 100 can deliver the liquid medium pressurized to a state higher than the preset pressure to the output unit 300, thereby inputting the liquid medium at a state higher than the preset pressure to the device under test through the output end. The input end of the low-pressure unit 200 is connected to the output end of the liquid source 400. The liquid source 400 can supply liquid medium into the low-pressure unit 200, thereby pressurizing the liquid medium supplied to the high-pressure unit 100 to a state below a preset pressure. The output end of the low-pressure unit 200 is connected to the input end of the output unit 300, and the low-pressure unit 200 can supply the liquid medium pressurized to a state below the preset pressure to the output unit 300, thereby inputting the liquid medium at a state below the preset pressure to the device under test through the output end. Through the cooperation of the high-pressure unit 100 and the low-pressure unit 200, a liquid medium at a specific pressure can be provided according to the needs of the device under test, thereby improving the pressurization range and accuracy of the liquid medium. Furthermore, since the low-pressure unit 200 can only pressurize the liquid medium to a state below the preset pressure, and the high-pressure unit 100 can only pressurize the liquid medium to a state above the preset pressure, pressurization efficiency can be guaranteed. Simultaneously, when the liquid medium pressure required for the device under test (DUT) to undergo hydrostatic testing is within the adjustable low-pressure range of the low-pressure section 200, the input terminal of the output section 300 is connected to the output terminal of the low-pressure section 200. This allows the low-pressure section 200 to provide the DUT with a liquid pressure below a preset pressure, improving the pressurization accuracy and efficiency for pressurizing the liquid medium to a pressure below the preset pressure. When the liquid medium pressure required for the DUT to undergo hydrostatic testing is within the adjustable high-pressure range of the high-pressure section 100, if the liquid medium pressure in the output section 300 is higher than the preset pressure, the input terminal of the output section 300 is connected to the output terminal of the high-pressure section 100. This allows the high-pressure section 100 to provide the DUT with a liquid pressure above the preset pressure, improving the pressurization accuracy and efficiency for pressurizing the liquid medium to a pressure above the preset pressure.When the liquid medium pressure required for the device under test (DUT) to undergo a hydrostatic test is within the adjustable high-pressure range of the high-pressure section 100, if the liquid medium pressure in the output section 300 is lower than the preset pressure, the input terminal of the output section 300 is first connected to the output terminal of the low-pressure section 200. The low-pressure section 200 then prioritizes pressurizing the liquid medium. Because the flow rate of the liquid medium below the preset pressure is greater than that above the preset pressure, the low-pressure section 200, with its larger flow rate, can initially provide a certain amount of liquid medium to the DUT. This significantly shortens the overall liquid medium supply time until the output... After the pressure of the liquid medium in section 300 gradually increases and exceeds the preset pressure, the output end of the low-pressure section 200 is isolated from the input end of the output section 300, and the output end of the high-pressure section 100 is connected to the input end of the output section 300. Thus, the high-pressure section 100 provides the device under test with a liquid medium at a pressure higher than the preset pressure, thereby increasing the pressure of the liquid medium input into the device under test. Through the cooperation of the low-pressure section 200 and the high-pressure section 100, the time for inputting the liquid medium into the device under test can be reduced, the liquid medium input efficiency can be improved, and the pressure requirements of the device under test for the input liquid medium can be met.

[0042] In some specific embodiments of the present invention, a controller is also included. The electrical connection terminals of the output unit 300 are connected to the electrical connection terminals of the high-pressure unit 100 and the low-pressure unit 200, respectively, via the controller. The controller is capable of controlling the opening and closing of the high-pressure unit 100 and the low-pressure unit 200 based on the pressure detection result of the liquid medium within the output unit 300 by the output unit 300.

[0043] Specifically, the electrical connection terminal of the output unit 300 is connected to the input terminal of the controller. The output unit 300 can transmit the detected pressure result of the liquid medium within the output unit 300 to the controller. The controller can compare the received pressure result of the liquid medium within the output unit 300 with a preset pressure. The output terminal of the controller is connected to the electrical connection terminals of the high-pressure unit 100 and the low-pressure unit 200, respectively. This allows the controller to control the opening or closing of the high-pressure unit 100 and the low-pressure unit 200 based on the comparison result of the pressure of the liquid medium within the output unit 300 with the preset pressure and the pressure of the liquid medium required by the device under test. When the pressure of the liquid medium required by the device under test is within the low-pressure range, the controller controls the high-pressure unit 100 to close and controls the low-pressure unit 200 to open, pressurizing the liquid medium to a specific state below the preset pressure. When the pressure of the liquid medium required by the device under test is within the high-pressure range, and the pressure of the liquid medium within the output unit 300 is higher than the preset pressure, the controller controls the low-pressure unit 200 to close and controls the high-pressure unit 100 to open, pressurizing the liquid medium to a specific state above the preset pressure. When the pressure of the liquid medium required by the device under test is within the high pressure range, and the pressure of the liquid medium in the output section 300 is lower than the preset pressure, the controller first controls the high pressure section 100 to close and controls the low pressure section 200 to start running to pressurize the liquid medium until the pressure of the liquid medium in the output section 300 is higher than the preset pressure. Then the controller controls the low pressure section 200 to close and controls the high pressure section 100 to start running to pressurize the liquid medium to a specific state higher than the preset pressure.

[0044] In some specific embodiments of the present invention, the high-pressure unit 100 includes a high-pressure pump 110 and a high-pressure circuit 120. The high-pressure pump 110 is capable of pressurizing the liquid medium. The high-pressure pump 110 is disposed on the high-pressure circuit 120. One end of the high-pressure circuit 120 is connected to the input end of the output unit 300, and the other end of the high-pressure circuit 120 is connected to the output end of the liquid source 400. The liquid medium input from the liquid source 400 into the high-pressure circuit 120 is pressurized by the high-pressure pump 110, thereby increasing the pressure of the liquid medium to a specific state higher than the preset pressure, thus improving the high-pressure pressurization efficiency.

[0045] In some specific embodiments of the present invention, the low-pressure unit 200 includes a low-pressure pump 210 and a low-pressure circuit 220. The low-pressure pump 210 is capable of pressurizing the liquid medium. The low-pressure pump 210 is disposed on the low-pressure circuit 220. One end of the low-pressure circuit 220 is connected to the input end of the output unit 300, and the other end of the low-pressure circuit 220 is connected to the output end of the liquid source 400. The liquid medium input from the liquid source 400 into the low-pressure circuit 220 is pressurized by the low-pressure pump 210, thereby increasing the pressure of the liquid medium to a specific state lower than a preset pressure, thus improving the low-pressure pressurization efficiency.

[0046] It should be noted that the preset pressure is determined based on the low-pressure pump 210 and the high-pressure pump 110. For example, if the pressure boosting range of the low-pressure pump 210 is 36 bar to 288 bar and the pressure boosting range of the high-pressure pump 110 is 280 bar to 2100 bar, then the preset pressure range is 280 bar to 288 bar.

[0047] Furthermore, a pneumatic drive circuit 500 is provided, which is connected to both the high-pressure pump 110 and the low-pressure pump 210. The pneumatic drive circuit 500 can supply gaseous media to the high-pressure pump 110 and the low-pressure pump 210 to drive their operation. The electrical connection terminal of the pneumatic drive circuit 500 is connected to the output terminal of the controller, so that the controller can control the pneumatic drive circuit 500 to supply gaseous media to the high-pressure pump 110 and the low-pressure pump 210, thereby pressurizing the liquid medium through the operation of the high-pressure pump 110 and the low-pressure pump 210.

[0048] Furthermore, the gas drive circuit 500 includes a gas source, a high-pressure gas drive branch, and a low-pressure gas drive branch. The high-pressure gas drive branch connects the gas inlet of the high-pressure pump 110 to the output of the gas source, and the low-pressure gas drive branch connects the gas inlet of the low-pressure pump 210 to the output of the gas source, so that the gas source can supply gas medium to the high-pressure pump 110 and the low-pressure pump 210 to drive the high-pressure pump 110 and the low-pressure pump 210 to operate.

[0049] Furthermore, a first valve 511 is installed on the high-pressure gas drive branch. The electrical connection terminal of the first valve 511 is connected to the output terminal of the controller. The controller can control the opening and closing of the first valve 511. When the first valve 511 is in the open state, the gas source can be connected to the high-pressure pump 110 through the high-pressure gas drive branch. A second valve 521 is installed on the low-pressure gas drive branch. The electrical connection terminal of the second valve 521 is connected to the output terminal of the controller. The controller can control the opening and closing of the second valve 521. When the second valve 521 is in the open state, the gas source can be connected to the low-pressure pump 210 through the low-pressure gas drive branch. Under normal circumstances, the first valve 511 and the second valve 521 will not be in the open state simultaneously.

[0050] Furthermore, a proportional valve 530 is installed at the output end of the gas source. The electrical connection of the proportional valve 530 is connected to the output end of the controller. The controller can control the opening degree of the proportional valve 530, thereby adjusting the flow rate of the gas medium delivered to the high-pressure pump 110 or the low-pressure pump 210. When the pressure of the liquid medium required by the device under test is determined, since the pressure ratio between the low-pressure pump 210 and the high-pressure pump 110 is fixed, the controller can control the opening degree of the proportional valve 530, thereby allowing the low-pressure pump 210 or the high-pressure pump 110 to output liquid media at different pressures to meet the testing and inspection needs of various devices under test.

[0051] The product of the input-output ratio of the proportional valve 530 and the pressure ratio of the low-pressure pump 210 is the total pressure ratio of the low-pressure circuit 220, and the product of the input-output ratio of the proportional valve 530 and the pressure ratio of the high-pressure pump 110 is the total pressure ratio of the high-pressure circuit 120.

[0052] Furthermore, the pressure ratio of the low-pressure pump 210 is 1:36, the pressure ratio of the high-pressure pump 110 is 1:277, and the maximum input-output ratio of the proportional valve 530 is 1. Therefore, the maximum total pressure ratio of the low-pressure circuit 220 is 1:36, and the maximum total pressure ratio of the high-pressure circuit 120 is 1:277. If the maximum working pressure of the gas source is 10 bar, then the maximum output pressure of the liquid medium in the low-pressure circuit 220 is 360 bar, and the operating pressure is 36 bar - 288 bar. The maximum output pressure of the liquid medium in the high-pressure circuit 120 is 2770 bar, and the operating pressure is 280 bar - 2100 bar. In this case, the preset pressure range is 280 bar - 288 bar.

[0053] In some specific embodiments of the present invention, the output unit 300 includes an output circuit 310 and a detection circuit 320. The input terminal of the output circuit 310 is connected to the output terminals of the high-pressure unit 100 and the low-pressure unit 200, respectively, so that the liquid medium pressurized by the high-pressure unit 100 or the low-pressure unit 200 can be output into the output circuit 310 and transported to the device under test via the output circuit 310. The detection circuit 320 is connected to the middle of the output circuit 310, and the pressure of the liquid medium output into the output circuit 310 can be detected via the detection circuit 320. The electrical connection terminal of the detection circuit 320 is connected to a controller, thereby transmitting the detected pressure result of the liquid medium in the output circuit 310 to the controller.

[0054] Specifically, the high-pressure circuit 120 and the low-pressure circuit 220 are connected in parallel. The end of the high-pressure circuit 120 away from the liquid source 400 and the end of the low-pressure circuit 220 away from the liquid source 400 are respectively connected to the input end of the output circuit 310, so that the liquid medium pressurized by the high-pressure pump 110 or the liquid medium pressurized by the low-pressure pump 210 can be transported into the output circuit 310.

[0055] In some specific embodiments of the present invention, a one-way valve 221 is provided between the output terminal of the high-pressure section 100 and the input terminal of the output section 300. Alternatively, a one-way valve 221 is provided between the output terminal of the low-pressure section 200 and the input terminal of the output section 300. Alternatively, one-way valves 221 are provided between the output terminals of the high-pressure section 100 and the low-pressure section 200 and the input terminals of the output section 300, respectively.

[0056] Specifically, a check valve 221 is installed at the end of the high-pressure circuit 120 near the output circuit 310, allowing the high-pressure circuit 120 to connect to the output circuit 310 via the check valve 221. The electrical connection of the check valve 221 is connected to the output of the controller, allowing the controller to control the opening and closing of the check valve 221. This prevents the high-pressure circuit 120 from being affected by the liquid medium output from the low-pressure circuit 220. When the low-pressure circuit 220 outputs a liquid medium at a pressure lower than a preset value, the controller closes the check valve 221, preventing the liquid medium from the low-pressure circuit 220 from entering the high-pressure circuit 120. Alternatively, a check valve 221 may be installed at the end of the low-pressure circuit 220 near the output circuit 310, allowing the low-pressure circuit 220 to connect to the output circuit 310 via the check valve 221. The electrical connection of the check valve 221 is connected to the output of the controller, allowing the controller to control the opening or closing of the check valve 221, thereby preventing the low-pressure circuit 220 from being affected by the liquid medium output from the high-pressure circuit 120. When the high-pressure circuit 120 outputs a liquid medium at a pressure higher than a preset value, the controller closes the check valve 221, thus preventing the liquid medium at a pressure higher than the preset value from entering the low-pressure circuit 220. Alternatively, both the high-pressure circuit 120 and the low-pressure circuit 220 near the output circuit 310 are equipped with check valves 221. This allows the high-pressure circuit 120 to connect to the output circuit 310 via check valve 221, and the low-pressure circuit 220 to connect to the output circuit 310 via another check valve 221. The electrical connections of both check valves 221 are connected to the output of the controller, allowing the controller to control the opening and closing of the two check valves 221. This prevents mutual interference between the high-pressure and low-pressure circuits 120, preventing liquid media output from the low-pressure circuit 220 at pressures below the preset pressure from entering the high-pressure circuit 120, and also preventing liquid media output from the high-pressure circuit 120 at pressures above the preset pressure from entering the low-pressure circuit 220. Furthermore, the check valves 221 also prevent backflow of the liquid media.

[0057] In some specific embodiments of the present invention, the output terminal of the high-pressure section 100 is connected to a first relief valve 121 to prevent the high-pressure section 100 from overloading. The output terminal of the low-pressure section 200 is connected to a second relief valve 222 to prevent the low-pressure section 200 from overloading.

[0058] Specifically, the output end of the high-pressure circuit 120 is connected to a first relief valve 121, which discharges a portion of the liquid medium output from the high-pressure circuit 120 at a pressure higher than a preset value. The output end of the low-pressure circuit 220 is connected to a second relief valve 222, which discharges a portion of the liquid medium output from the low-pressure circuit 220 at a pressure lower than a preset value. The cooperation of the first relief valve 121 and the second relief valve 222 prevents overload in both the high-pressure and low-pressure circuits, thus extending their service life.

[0059] Furthermore, when a check valve 221 is installed only at the end of the high-pressure circuit 120 near the output circuit 310, the first relief valve 121 is located between the check valve 221 and the high-pressure pump 110, and the second relief valve 222 is located at the end of the output circuit 310 near the low-pressure circuit 220. When a check valve 221 is installed only at the end of the low-pressure circuit 220 near the output circuit 310, the first relief valve 121 is located at the end of the output circuit 310 near the high-pressure circuit 120, and the second relief valve 222 is located between the check valve 221 and the low-pressure pump 210. When both the high-voltage circuit 120 and the low-voltage circuit 220 near the output circuit 310 are equipped with check valves 221, the first relief valve 121 is located between the check valve 221 in the high-voltage circuit 120 and the high-voltage pump 110, and the second relief valve 222 is located between the check valve 221 in the low-voltage circuit 220 and the low-pressure pump 210.

[0060] In some specific embodiments of the present invention, the detection circuit 320 includes a first detection branch 321 and a second detection branch 322. A first pressure sensor 3211 is provided on the first detection branch 321, which is capable of detecting the pressure of a liquid medium at a state higher than a preset pressure. A second pressure sensor 3221 is provided on the second detection branch 322, which is capable of detecting the pressure of a liquid medium at a state lower than a preset pressure.

[0061] Specifically, the first detection branch 321 is connected to the output circuit 310. A first pressure sensor 3211 installed on the first detection branch 321 can detect the liquid pressure within the output circuit 310. The first pressure sensor 3211 is a high-pressure sensor; therefore, it can detect the pressure of the liquid medium within the output circuit 310 when it is above a preset pressure, thus improving detection accuracy. The second detection branch 322 is also connected to the output circuit 310. A second pressure sensor 3221 installed on the second detection branch 322 can detect the liquid pressure within the output circuit 310. The second pressure sensor 3221 is a low-pressure sensor; therefore, it can detect the pressure of the liquid medium within the output circuit 310 when it is below a preset pressure, thus improving detection accuracy. Normally, when the low-pressure pump 210 is running, the liquid pressure in the output circuit 310 is detected by the second pressure sensor 3221. When the high-pressure pump 110 is running, the liquid pressure in the output circuit 310 is detected by the first pressure sensor 3211. The electrical connection terminals of the first pressure sensor 3211 and the second pressure sensor 3221 are respectively connected to the input terminal of the controller so as to transmit the detection results to the controller.

[0062] Furthermore, a detection valve 3222 is provided at the end of the second detection branch 322 near the output circuit 310, that is, the detection valve 3222 is located between the second pressure sensor 3221 and the output circuit 310. The electrical connection terminal of the detection valve 3222 is connected to the output terminal of the controller, which can control the opening and closing of the detection valve 3222. When the detection valve 3222 is in the open state, the pressure of the liquid medium flowing into the second detection branch 322 is the same as the pressure of the liquid medium in the output circuit 310. When the second sensor detects that the pressure of the liquid medium flowing into the detection branch exceeds the preset pressure, the second sensor will transmit the detection result to the controller, so that the controller can control the detection valve 3222 to close, thereby disconnecting the second detection branch 322 from the output circuit 310. This avoids damage to the second pressure sensor 3221 due to excessive pressure of the liquid medium.

[0063] In some specific embodiments of the present invention, the second detection branch 322 is connected to a third overflow valve 3223 to prevent overload of the second detection branch 322. Because the second pressure sensor 3221 is a low-pressure sensor, and the flow rate of the liquid medium below the preset pressure is greater than the flow rate of the liquid medium above the preset pressure, that is, when the second pressure sensor 3221 is working, the flow rate of the liquid medium in the second detection branch 322 is relatively large. Therefore, by setting the third overflow valve 3223, overload of the second detection branch 322 can be avoided, thus improving the service life of the second detection branch 322.

[0064] In some specific embodiments of the present invention, a pressure relief valve 311 is connected to the output terminal of the output circuit 310 to relieve pressure on the liquid medium within the output circuit 310. The electrical connection terminal of the pressure relief valve 311 is connected to the output terminal of the controller. When the device under test completes the hydrostatic test or when pressure relief is required, the controller can control the pressure relief valve 311 to open, allowing the output circuit 310 to connect with the external environment through the pressure relief valve 311, thereby relieving pressure on the liquid medium within the output circuit 310. This facilitates subsequent hydrostatic testing of another device under test, improving the efficiency of the testing process.

[0065] Furthermore, a pressure-holding valve 312 is provided at the input terminal of the output circuit 310. The electrical connection terminal of the pressure-holding valve 312 is connected to the output terminal of the controller. The output terminals of the high-pressure circuit 120 and the low-pressure circuit 220 are both connected to the input terminal of the output circuit 310 through the pressure-holding valve 312. When the liquid medium input into the device under test is completed, the controller can control the pressure-holding valve 312 to close, so that both the device under test and the output circuit 310 are in a pressure-holding state, maintaining stable pressure for subsequent performance testing and verification of the device under test.

[0066] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water pressure boosting pressure testing device for testing an inspection, characterized by, The application relates to a liquid pressure control device. The application comprises: a high-pressure part (100) capable of increasing the pressure of liquid medium delivered by a liquid source (400) to a state higher than a preset pressure to output liquid medium higher than the preset pressure; a low-pressure part (200) capable of increasing the pressure of liquid medium delivered by the liquid source (400) to a state lower than the preset pressure to output liquid medium lower than the preset pressure; an output part (300) with input ends connected with the output end of the high-pressure part (100) and the output end of the low-pressure part (200) respectively, so that the liquid medium higher than the preset pressure output by the high-pressure part (100) or the liquid medium lower than the preset pressure output by the low-pressure part (200) can reach the output part (300); the output part (300) is capable of detecting the pressure of liquid medium reaching the output part (300); when the pressure of liquid medium in the output part (300) is lower than the preset pressure, the input end of the output part (300) is communicated with the output end of the low-pressure part (200), and the liquid medium is pressurized by the low-pressure part (200); 2. The hydrostatic pressure proofing device for testing proofing according to claim 1, characterized in that, when the pressure of liquid medium in the output part (300) is higher than the preset pressure, the input end of the output part (300) is communicated with the output end of the high-pressure part (100), and the liquid medium is pressurized by the high-pressure part (100). The application further comprises: a controller, the electric connection end of the output part (300) is connected with the electric connection end of the high-pressure part (100) and the electric connection end of the low-pressure part (200) respectively through the controller; 3. The hydrostatic pressure proofing device for testing proofing according to claim 2, characterized in that the controller can control the opening and closing of the high-pressure part (100) and the low-pressure part (200) according to the detection result of the output part (300) on the pressure of liquid medium in the output part (300). a one-way valve (221) is arranged between the output end of the high-pressure part (100) and the input end of the output part (300); or, a one-way valve (221) is arranged between the output end of the low-pressure part (200) and the input end of the output part (300); 4. The hydrostatic pressure proofing device for testing proofing according to claim 2, wherein or, one-way valves (221) are arranged between the output end of the high-pressure part (100) and the input end of the output part (300) and between the output end of the low-pressure part (200) and the input end of the output part (300) respectively. a first overflow valve (121) is connected with the output end of the high-pressure part (100) to avoid overloading of the high-pressure part (100); 5. The hydrostatic pressure proofing device for testing proofing according to claim 2, wherein, a second overflow valve (222) is connected with the output end of the low-pressure part (200) to avoid overloading of the low-pressure part (200). The high-pressure part (100) comprises: a high-pressure pump (110) capable of pressurizing liquid medium; 6. The hydrostatic pressure proofing device for testing proofing according to claim 2, wherein a high-pressure circuit (120), the high-pressure pump (110) is arranged on the high-pressure circuit (120), one end of the high-pressure circuit (120) is connected with the input end of the output part (300), and the other end of the high-pressure circuit (120) is connected with the output end of the liquid source (400). The low-pressure part (200) comprises: A low-pressure pump (210) capable of pressurizing the liquid medium; A low-pressure circuit (220) on which the low-pressure pump (210) is arranged, one end of the low-pressure circuit (220) being connected with an input end of the output part (300), and the other end of the low-pressure circuit (220) being connected with an output end of the liquid source (400).

7. The hydrostatic pressure boost press for testing an examine according to claim 2, characterized by, The output part (300) comprises: An output circuit (310) having an input end connected with an output end of the high-pressure part (100) and an output end of the low-pressure part (200) respectively, so as to output the pressurized liquid medium; A detection circuit (320) connected with a middle part of the output circuit (310), so as to detect the pressure of the liquid medium in the output circuit (310).

8. The hydrostatic pressure boost press for testing an examinee according to claim 7, wherein The detection circuit (320) comprises: A first detection branch (321) on which a first pressure sensor (3211) is arranged, the first pressure sensor (3211) being capable of detecting the pressure of the liquid medium higher than the preset pressure; A second detection branch (322) on which a second pressure sensor (3221) is arranged, the second pressure sensor (3221) being capable of detecting the pressure of the liquid medium lower than the preset pressure.

9. The hydrostatic pressure proofing device for testing proofing according to claim 8, characterized in that, The second detection branch (322) is connected with a third overflow valve (3223), so as to avoid overloading of the second detection branch (322).

10. A hydrostatic pressure testing apparatus for testing a test piece according to any one of claims 7 to 9, characterized in that, An output end of the output circuit (310) is connected with a pressure relief valve (311), so as to be capable of depressurizing the liquid medium in the output circuit (310) through the pressure relief valve (311).

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