Hydraulic control system for differential pressure indicator test

Abstract

The utility model relates to the technical field of differential pressure indicator detection, and particularly discloses a hydraulic control system for a differential pressure indicator test, which comprises an oil tank, an oil outlet of the oil tank is connected with a power assembly for providing oil circulation power, and the power assembly is connected with a test valve block. The testing valve block is provided with a first oil discharge outlet and a second oil discharge outlet which are used for being communicated with the two ends of the differential pressure indicator respectively, a first pipeline and a second pipeline are connected between the power assembly and the testing valve block, the first pipeline is connected with the first oil discharge outlet, and the second pipeline is connected with the second oil discharge outlet. A first pressure sensor is arranged at the end, close to the first oil discharge outlet, of the first pipeline, the second pipeline is connected with the second oil discharge outlet, a second pressure sensor is arranged at the end, close to the second oil discharge outlet, of the second pipeline, and a throttling valve is arranged on the first pipeline. According to the invention, the differential pressure transmitter can be conveniently detected.

Description

Technical Field

[0001] The present application relates to the technical field of pressure differential signal transmitter detection, and in particular to a hydraulic control system for pressure differential signal transmitter testing. Background Art

[0002] The differential pressure transmitter is an essential component in hydraulic systems. It monitors filter blockage in real time and, when necessary, issues an alarm or shuts off the control circuit to ensure safe operation. With the advancement of hydraulic technology, the application of differential pressure transmitters is becoming increasingly widespread, and their performance and reliability directly impact the stability and safety of the entire hydraulic system.

[0003] Currently, there are two main methods for testing differential pressure transmitters on the market: manually applying pressure and recording the response; and using more complex automated devices to achieve precise measurement and data recording. While these methods can meet testing needs to a certain extent, they still have some shortcomings in practical application.

[0004] Traditional testing methods rely heavily on manual labor, which is inefficient and susceptible to human error, making it difficult to guarantee accurate and consistent test results. While some advanced automated testing equipment offers high precision and stability, its high cost limits its adoption by small and medium-sized enterprises. Therefore, there is an urgent need to develop a dedicated hydraulic control system for differential pressure transmitters that can both guarantee test accuracy and lower the barrier to entry. Utility Model Content

[0005] In order to facilitate the detection of the pressure differential indicator, the present application provides a hydraulic control system for testing the pressure differential indicator.

[0006] The hydraulic control system for pressure differential indicator testing provided in this application adopts the following technical solution:

[0007] A hydraulic control system for testing a differential pressure transmitter comprises an oil tank, wherein the oil outlet of the oil tank is connected to a power assembly for providing oil circulation power, the power assembly is connected to a test valve block, the test valve block is provided with a first oil drain port and a second oil drain port for respectively communicating with the two ends of the differential pressure transmitter, a first pipeline and a second pipeline are connected between the power assembly and the test valve block, the first pipeline is connected to the first oil drain port, a first pressure sensor is provided at one end of the first pipeline close to the first oil drain port, the second pipeline is connected to the second oil drain port, a second pressure sensor is provided at one end of the second pipeline close to the second oil drain port, and a throttle valve is provided on the first pipeline.

[0008] By adopting the above technical solution, the hydraulic control system can provide accurate and controllable oil pressure for both ends of the pressure differential indicator, thereby detecting whether the pressure differential indicator can work normally; the pressure at both ends of the pressure differential indicator is monitored in real time by the first pressure sensor and the second pressure sensor, thereby ensuring the accuracy of the detection process; the setting of the throttle valve can accurately control the oil flow and pressure in the first pipeline, thereby realizing detection under different working conditions.

[0009] Optionally, the power assembly includes a first pump body, a coupling and a motor, and the coupling is connected between the first pump body and the motor.

[0010] By adopting the above technical solution, the combined design of the first pump body, coupling and motor ensures the stable output of oil circulation power, thereby ensuring the reliability and accuracy of the pressure differential indicator test.

[0011] Optionally, the second pipeline is connected to an oil return pipeline, and an overflow valve and a two-position four-way valve are provided between the first pipeline and the second pipeline.

[0012] By adopting the above technical solution, the return oil pipeline connected to the second pipeline can smoothly return the tested oil to the oil tank, realizing oil recycling and reducing resource waste; the overflow valve arranged between the first pipeline and the second pipeline can adjust the system pressure, ensuring that the system operates within a safe pressure range and avoiding damage to the system caused by overpressure; at the same time, the setting of the two-position four-way valve enables the system to adjust the oil flow direction according to test needs, thereby enhancing the flexibility and applicability of system operation.

[0013] Optionally, a first pressure gauge and a second pressure gauge are respectively provided on both ends of the throttle valve on the first pipeline.

[0014] By adopting the above technical solution, the first pressure gauge and the second pressure gauge facilitate real-time monitoring of the pressure changes of the oil before and after the throttle valve, ensuring accurate grasp of the pressure state of the system and improving the accuracy and reliability of the pressure differential indicator test process.

[0015] Optionally, the test valve block is provided with a plurality of installation positions for installing differential pressure transmitters.

[0016] By adopting the above technical solution, multiple pressure difference transmitters can be tested at the same time, effectively improving the detection efficiency.

[0017] Optionally, an oil receiving tray is provided below the test valve block, and the oil receiving tray is connected to the oil tank.

[0018] By adopting the above technical solution, the oil collecting tray provided under the test valve block can effectively collect the oil leaked from the test valve block and guide the collected oil back to the oil tank, thereby avoiding oil waste and environmental pollution, and ensuring the cleanliness and safety of the test system.

[0019] Optionally, a cooling assembly is provided on the oil tank, and the cooling assembly includes a second pump body, an oil return air cooler and an oil return filter. The input end of the second pump body is connected to the oil tank, the output end of the second pump body is connected to the oil return air cooler, the end of the oil return air cooler away from the pump body is connected to the oil return filter, and the end of the oil return filter away from the oil return air cooler is connected to the oil tank.

[0020] By adopting the above technical solution, the setting of the cooling component can effectively reduce the oil temperature and ensure the stable operation of the hydraulic control system; the second pump body drives the oil to pass through the return oil air cooler for cooling, and then filter it through the return oil filter before finally returning to the oil tank, ensuring the cleanliness of the oil while also improving the heat dissipation efficiency of the system.

[0021] Optionally, an oil suction filter is provided between the oil tank and the power assembly, and a medium-pressure filter is provided at one end of the power assembly away from the oil suction filter.

[0022] By adopting the above technical solution, impurities in the oil can be effectively filtered and the cleanliness of the oil can be improved.

[0023] Optionally, an air filter is provided on the fuel tank.

[0024] By adopting the above technical solution, the air filter can effectively filter impurities in the air entering the fuel tank, ensuring the cleanliness of the oil in the fuel tank, thereby improving the stability and reliability of the hydraulic control system.

[0025] Optionally, the oil tank is provided with a liquid level and temperature gauge, a liquid level relay and a temperature sensor.

[0026] By adopting the above technical solution, the liquid level and temperature of the oil in the oil tank can be monitored in real time to ensure that the hydraulic system operates within a safe range.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. After the differential pressure transmitter is installed on the test valve block, the hydraulic system can supply oil to both ends of the differential pressure transmitter through the first pipeline and the second pipeline respectively to test whether the differential pressure transmitter can work normally.

[0029] 2. The test valve block is equipped with multiple mounting positions, so multiple differential pressure transmitters can be tested simultaneously, which helps improve detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a diagram of a hydraulic control system according to an embodiment of the present application;

[0031] Figure 2 yes Figure 1 Enlarged schematic diagram of point A in the middle.

[0032] Reference numerals: 1, oil tank; 2, test valve block; 21, first oil drain port; 22, second oil drain port; 23, first flow channel; 24, second flow channel; 3, first pipeline; 4, second pipeline; 5, first pressure sensor; 6, second pressure sensor; 7, throttle valve; 8, first pump body; 9, oil return line; 10, overflow valve; 11, two-position four-way valve; 12, first pressure gauge; 13, second pressure gauge; 14, oil receiving tray ;15. Cooling assembly;151. Second pump body;152. Return oil air cooler;153. Return oil filter;16. Suction filter;17. Medium pressure filter;18. Air filter;19. Liquid level and temperature gauge;20. Liquid level relay;25. Temperature sensor;26. Oil drain ball valve;27. Pressure measuring joint;28. Pressure measuring hose;29. Third pressure gauge;30. Ball valve;31. One-way valve;32. Pressure differential transmitter. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-2 This application is described in further detail.

[0034] The embodiment of the present application discloses a hydraulic control system for testing a pressure differential transmitter. Figure 1 and Figure 2 The hydraulic control system for testing the differential pressure transmitter includes an oil tank 1, which is equipped with a cooling assembly 15. The cooling assembly 15 includes a second pump body 151, an oil return air cooler 152, and an oil return filter 153. The second pump body 151 is a vane pump. A motor and a coupling connected between the motor and the second pump body 151 are provided next to the second pump body 151. When the motor is started, it can drive the vane pump to operate. The input end of the second pump body 151 is connected to the oil tank 1, and the output end of the second pump body 151 is connected to the oil return air cooler 152; the oil return air cooler 152 is connected to the oil return filter 153, and the oil return filter 153 is connected to the oil tank 1. Therefore, the second pump body 151 can draw the oil in the oil tank 1 into the oil return air cooler 152. After the oil is cooled, it is discharged into the oil tank 1 through the oil return filter 153, thereby cooling the oil.

[0035] An air filter 18 is provided on the oil tank 1, which can prevent particulate pollutants from invading the hydraulic system through the breathing port of the oil tank 1 and keep the oil clean; the air filter 18 can also maintain the pressure in the oil tank 1 balanced with the atmospheric pressure, which helps to ensure the normal operation of the pump body.

[0036] The fuel tank 1 is also equipped with a liquid level and temperature gauge 19, a liquid level relay 20, and a temperature sensor 25. The liquid level and temperature gauge 19 displays the current level and temperature of the liquid in the fuel tank 1, facilitating monitoring by the operator. A drain ball valve 26 is located at the bottom of the fuel tank 1. Opening this drain ball valve allows the oil in the tank 1 to be quickly drained. The liquid level relay 20 provides automatic control and alarms to ensure the liquid level in the fuel tank 1 remains within the appropriate range. The temperature sensor 25 detects the oil temperature to prevent overheating. When the oil temperature exceeds a predetermined value, the cooling assembly 15 activates, and the second pump 151 pumps the oil into the oil return air cooler 152 for cooling. When the oil temperature does not exceed the predetermined value, the second pump 151 and the oil return air cooler 152 shut down.

[0037] The oil outlet of oil tank 1 is connected to a power assembly comprising a first pump body 8, a coupling, and a motor. First pump body 8 is a gear pump, and the coupling is a bell-shaped coupling fixedly connected between the motor's output shaft and first pump body 8. When the motor is started, it drives first pump body 8 through the coupling, thereby pumping oil from oil tank 1.

[0038] Furthermore, an oil suction filter 16 is disposed between the oil tank 1 and the first pump body 8. A medium-pressure filter 17 is connected to the output end of the first pump body 8, thereby filtering out impurities from the oil and helping to ensure the normal operation of the hydraulic control system. A one-way valve 31 is provided at the end of the medium-pressure filter 17 to ensure unidirectional flow of pressurized oil. A pressure measuring connector 27 is connected to the end of the medium-pressure filter 17 away from the first pump body 8. A pressure measuring hose 28 is connected to the end of the pressure measuring connector 27, and a third pressure gauge 29 is connected to the end of the pressure measuring hose 28, thereby facilitating observation of the oil pressure at the starting end.

[0039] The end of the medium-pressure filter 17 away from the first pump body 8 is also connected to a test valve block 2. The test valve block 2 is provided with multiple mounting locations, each of which can be equipped with a differential pressure transmitter 32. A first oil drain port 21 and a second oil drain port 22 are provided next to each mounting location on the test valve block 2. These ports are used to connect the two ends of the differential pressure transmitter 32. The test valve block 2 has a first flow channel 23 and a second flow channel 24 defined within it. Each first oil drain port 21 is connected to the first flow channel 23, and each second oil drain port 22 is connected to the second flow channel 24. A first pipeline 3 and a second pipeline 4 are connected between the medium-pressure filter 17 and the test valve block 2. Both the first pipeline 3 and the second pipeline 4 are connected to the medium-pressure filter 17. The end of the first pipeline 3 away from the medium-pressure filter 17 is connected to the first flow channel 23, and the end of the second pipeline 4 away from the medium-pressure filter 17 is connected to the second flow channel 24.

[0040] A throttle valve 7 is installed on the first pipeline 3. This valve is used to control the oil pressure in the first pipeline 3. The throttle valve 7 can create differences in the oil pressure in the first pipeline 3 and the second pipeline 4, thereby simulating different operating conditions and testing the differential pressure transmitter 32. A first pressure gauge 12 and a second pressure gauge 13 are installed on both ends of the first pipeline 3. A pressure measuring joint 27 and a pressure measuring hose 28 are connected between the first pressure gauge 12 and the first pipeline 3, and between the second pressure gauge 13 and the first pipeline 3, respectively. This facilitates observation of the pressure values ​​at both ends of the throttle valve 7.

[0041] During testing, the first pump body 8 is activated to pump the oil in the oil tank 1 into the first pipeline 3 and the second pipeline 4. The oil in the first pipeline 3 can flow into one end of the differential pressure transmitter 32 through the first flow channel 23 and the first oil discharge port 21, and the oil in the second pipeline 4 can flow into the other end of the differential pressure transmitter 32 through the second flow channel 24 and the second oil discharge port 22. Thus, oil is passed to both ends of the differential pressure transmitter 32 to test the differential pressure transmitter 32. The test system is also provided with an indicator light for electrical connection to the differential pressure transmitter 32. There are multiple indicator lights, each corresponding to a differential pressure transmitter 32. By observing the on and off status of the indicator lights, it is easy to determine whether the differential pressure transmitter 32 is operating normally.

[0042] Furthermore, a first pressure sensor 5 is connected to the end of the first pipeline 3 near the test valve block 2, and a second pressure sensor 6 is provided at the end of the second pipeline 4 near the test valve block 2. This allows detection of the oil pressure in the first and second pipelines 3, 4, and thus the oil pressure at both ends of the differential pressure transmitter 32, thereby facilitating precise control.

[0043] An oil receiving tray 14 is also provided under the test valve block 2. The oil receiving tray 14 is connected to the oil tank 1. Therefore, the oil receiving tray 14 can receive the oil flowing out of the test valve block 2 after the pressure differential transmitter 32 is removed, and then discharge the oil into the oil tank 1, thereby realizing the recycling of the oil and reducing waste.

[0044] To control system pressure, a return oil line 9 is provided on the second pipeline 4. The end of the return oil line 9, remote from the second pipeline 4, is connected to the fuel tank 1. A relief valve 10 is provided on the first pipeline 3. The P port (oil inlet) of the relief valve 10 is connected to the first pipeline 3, and the T port (oil outlet) of the relief valve 10 is connected to the second pipeline 4. Therefore, when the oil pressure in the first pipeline 3 exceeds the set pressure of the relief valve 10, the relief valve 10 opens, allowing some oil to flow through the relief valve 10 into the second pipeline 4. The oil is then discharged into the fuel tank 1 through the return oil line 9 on the second pipeline 4, thereby maintaining stable system pressure and ensuring safe operation.

[0045] A two-position, four-way valve 11 is also installed between the first pipeline 3 and the second pipeline 4. This solenoid-operated reversing valve is installed. Port P (the oil inlet) of the valve 11 is connected to the first pipeline 3, while port A is connected to the second pipeline 4. Port T (the oil outlet) of the valve 11 is connected to the second pipeline 4. Port B of the valve 11 is connected to the first pipeline 3. When the valve 11 is de-energized, port P connects to port A and port T connects to port B. This unloads the valve, facilitating the discharge of oil from the flow path within the valve block into the oil tank 1.

[0046] When the 2-position, 4-way valve 11 is energized, port P is connected to port B, and port T is connected to port A. At this point, the 2-position, 4-way valve 11 is in operation, meaning that the first and second pipelines 3 and 4 respectively deliver oil to both ends of the differential pressure transmitter 32, thereby detecting the differential pressure transmitter 32. Therefore, the configuration of the 2-position, 4-way valve 11 facilitates adjustment of the system's operating state.

[0047] A ball valve 30 is further provided on the test valve block 2 between the first flow channel 23 and the second flow channel 24 . The second flow channel 24 is connected to the second pipeline 4 . Therefore, after the ball valve 30 is opened, the oil in the test valve block 2 can be discharged easily.

[0048] The hydraulic control system for testing a differential pressure indicator according to the present embodiment is implemented as follows: After the first pump 8 is activated, the oil in the oil tank 1 is filtered by the oil suction filter 16 and the medium-pressure filter 17 before being pumped into the first pipeline 3 and the second pipeline 4. When the two-position four-way valve 11 is energized, port P is connected to port B and port T is connected to port A. The oil in the first pipeline 3 flows through the throttle valve 7 into the first flow channel 23 on the test valve block 2, and then flows through the first oil outlet 21 to one end of the differential pressure indicator 32. The oil in the second pipeline 4 flows into the second flow channel 24 on the test valve block 2, and then flows through the second oil outlet 22 to the other end of the differential pressure indicator 32. Due to the different oil pressures at both ends of the differential pressure indicator 32, the differential pressure indicator 32 actuates, indicating that the differential pressure indicator is operating normally. The throttle valve 7 is then adjusted to simulate different operating conditions, and the performance of the differential pressure indicator 32 under different operating conditions is observed.

[0049] The above are optional embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A hydraulic control system for testing a pressure differential indicator, characterized by: The invention comprises an oil tank (1), wherein an oil outlet of the oil tank (1) is connected to a power assembly for providing oil circulation power, the power assembly is connected to a test valve block (2), the test valve block (2) is provided with a first oil outlet (21) and a second oil outlet (22) for communicating with two ends of a pressure differential transmitter (32), a first pipeline (3) and a second pipeline (4) are connected between the power assembly and the test valve block (2), the first pipeline (3) is connected to the first oil outlet (21), a first pressure sensor (5) is provided at one end of the first pipeline (3) close to the first oil outlet (21), the second pipeline (4) is connected to the second oil outlet (22), a second pressure sensor (6) is provided at one end of the second pipeline (4) close to the second oil outlet (22), and a throttle valve (7) is provided on the first pipeline (3).

2. A hydraulic control system for testing a pressure differential indicator according to claim 1, characterized in that: The power assembly comprises a first pump body (8), a coupling and a motor, wherein the coupling is connected between the first pump body (8) and the motor.

3. The hydraulic control system for testing a pressure differential indicator according to claim 1, characterized in that: The second pipeline (4) is connected to an oil return pipeline (9), and an overflow valve (10) and a two-position four-way valve (11) are provided between the first pipeline (3) and the second pipeline (4).

4. The hydraulic control system for testing a differential pressure transmitter according to claim 1, characterized in that: A first pressure gauge (12) and a second pressure gauge (13) are respectively provided at both ends of the throttle valve (7) on the first pipeline (3).

5. The hydraulic control system for testing a differential pressure transmitter according to claim 1, characterized in that: The test valve block (2) is provided with a plurality of installation positions for installing differential pressure transmitters (32).

6. A hydraulic control system for testing a differential pressure transmitter according to claim 5, characterized in that: An oil receiving tray (14) is provided below the test valve block (2), and the oil receiving tray (14) is connected to the oil tank (1).

7. The hydraulic control system for testing a differential pressure transmitter according to claim 1, characterized in that: The oil tank (1) is provided with a cooling assembly (15), the cooling assembly (15) comprising a second pump body (151), an oil return air cooler (152) and an oil return filter (153), the input end of the second pump body (151) being connected to the oil tank (1), the output end of the second pump body (151) being connected to the oil return air cooler (152), the end of the oil return air cooler (152) away from the pump body being connected to the oil return filter (153), and the end of the oil return filter (153) away from the oil return air cooler (152) being connected to the oil tank (1).

8. The hydraulic control system for testing a differential pressure transmitter according to claim 1, characterized in that: An oil suction filter (16) is provided between the oil tank (1) and the power assembly, and a medium-pressure filter (17) is provided at one end of the power assembly away from the oil suction filter (16).

9. The hydraulic control system for testing a differential pressure transmitter according to claim 1, characterized in that: An air filter (18) is provided on the oil tank (1).

10. The hydraulic control system for testing a differential pressure transmitter according to claim 1, characterized in that: The oil tank (1) is provided with a liquid level and temperature gauge (19), a liquid level relay (20) and a temperature sensor (25).

Images