A hydraulic device for testing the pressure resistance of a valve

Abstract

The utility model relates to a kind of hydraulic devices for testing valve pressure resistance, including test stand, the top end, left end and front end of test stand are completely open, the bottom of test stand is fixedly installed with oil tank, the oil tank is fixedly installed with baffle in, baffle is isolated into first chamber and second chamber by oil tank, the inner top of test stand is fixedly installed with multiple sets of test module, test module is used to provide pressure mode and flow mode test to the tested piece, the right end of the inner top of test stand is fixedly installed with cooling mechanism, cooling mechanism is used to control the oil temperature of test, the parallel arrangement of multiple sets of test module, effectively solve the problem of traditional independent station test speed slow, can significantly improve test efficiency to match high-speed production assembly line tempo, first chamber and second chamber are formed by baffle isolation in oil tank interior, so that oil realizes physical separation in test cycle and cooling cycle, avoid uncooled oil directly participate in test to influence accuracy.

Description

Technical Field

[0001] This utility model relates to the field of valve testing technology, and in particular to a hydraulic device for testing the pressure resistance of valves. Background Technology

[0002] Valves, as key control components in fluid pipeline systems, are widely used in petrochemical, urban water supply and drainage, power, metallurgy, and natural gas transmission and distribution fields. Their pressure resistance and sealing reliability directly affect the safe and stable operation of the pipeline system. In actual operating conditions, valves are often subjected to high pressure, pulsating pressure, or transient impact pressure environments for extended periods. If the pressure resistance of the valve body, valve cover, sealing surfaces, or connections is insufficient, leakage or even rupture accidents can easily occur, causing significant economic losses and environmental pollution. Therefore, before valves leave the factory, their pressure resistance performance must be rigorously tested and verified through pressure tests, hydrostatic tests, or burst tests.

[0003] The aforementioned existing technical solutions have the following drawbacks: general-purpose test benches are mostly independent workstations, with slow testing speeds, making it difficult to synchronize with the pace of high-speed production lines and affecting overall production capacity. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic device for testing the pressure resistance of valves, thereby solving the problems existing in the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A hydraulic device for testing the pressure resistance of valves includes a test frame, the top, left, and front ends of which are completely open. An oil tank is fixedly installed at the bottom of the test frame, and a partition is fixedly installed inside the oil tank, dividing the oil tank into a first chamber and a second chamber. Multiple test modules are fixedly installed at the inner top of the test frame, and the test modules are used to provide pressure mode and flow mode tests on the test piece. A cooling mechanism is fixedly installed at the right end of the inner top of the test frame, and the cooling mechanism is used to control the oil temperature during the test.

[0006] By adopting the above technical solution and setting up multiple test modules in parallel, the problem of slow testing speed in traditional independent workstations is effectively solved, and the testing efficiency can be significantly improved to match the pace of high-speed production lines. The oil tank is divided into a first chamber and a second chamber by a partition, so that the oil is physically separated in the test cycle and the cooling cycle, avoiding the direct participation of uncooled oil in the test and affecting the accuracy.

[0007] In a further embodiment, the cooling mechanism includes a first motor, a first gear pump, and a water-cooled heat exchanger. The first motor pump is fixedly installed at the top right rear end of the test frame. The axis of the first motor pump is vertically arranged, and the output axis of the first motor pump extends downward into the second chamber. The front end of the output axis of the first motor pump is fixedly installed with a first gear pump. The bottom end of the right side of the oil tank is fixedly installed with a water-cooled heat exchanger. The axis of the water-cooled heat exchanger is arranged horizontally, and the other end of the water-cooled heat exchanger extends to the left into the first chamber. A first oil pipe is fixedly installed on the front side of the first gear pump, and a second oil pipe is fixedly installed on the rear side of the first gear pump. The other end of the second oil pipe extends outside the test frame and communicates with the water-cooled heat exchanger.

[0008] By adopting the above technical solution, the cooling mechanism drives the first gear pump through the first motor to transport the high-temperature oil in the second chamber to the water-cooled heat exchanger through the second oil pipe. The oil exchanges heat with the cooling water in the water-cooled heat exchanger to achieve cooling, and then flows back to the first chamber through its left end, forming an independent oil cooling circulation path. This can quickly reduce the oil temperature and ensure that the oil used for testing is always within the set temperature range, avoiding excessive oil temperature from affecting the performance of hydraulic components and the accuracy of test data.

[0009] In a further embodiment, the test module includes a second motor, a second gear pump, an accumulator, an integrated valve block, and a hydraulic filter. The second motor is fixedly installed on the inner top of the test frame, with its axis arranged front to back. The output shaft of the second motor is fixedly installed with the second gear pump. An integrated valve block is fixedly installed on the front side of the second gear pump. Hydraulic filters are symmetrically installed on the left and right sides of the front end of the integrated valve block, with the axis of the hydraulic filter arranged vertically. An accumulator is fixedly installed at the top of the rear end face of the test frame, with the axis of the accumulator arranged vertically.

[0010] By adopting the above technical solution, the test module drives the second gear pump through the second motor. The second gear pump draws cooled oil from the first chamber and delivers it to the integrated valve block through the fourth oil pipe. The integrated valve block can switch between pressure mode and flow mode according to test requirements. When pressure testing is performed, the accumulator can absorb system pressure pulsations and maintain a stable test pressure to ensure the accuracy of pressure test data. The hydraulic filter filters the oil entering the integrated valve block, effectively removing impurities from the oil, preventing impurities from entering the valve under test or damaging hydraulic components, extending the service life of the device and ensuring the reliability of the test. After the test is completed, the oil flows back to the second chamber through the fifth oil pipe, forming a complete test cycle.

[0011] In a further embodiment, a third oil pipe is fixedly installed on the left side of the second gear pump, and the other end of the third oil pipe extends downward into the first chamber. A fourth oil pipe is fixedly installed on the top of the second gear pump, and the other end of the fourth oil pipe is fixedly installed on the bottom right end of the integrated valve block. A fifth oil pipe is fixedly installed on the bottom left end of the integrated valve block, and the other end of the fifth oil pipe extends rearward into the second chamber. A sixth oil pipe is fixedly installed on the top of the integrated valve block, and the other end of the sixth oil pipe is connected to the accumulator. A seventh oil pipe is fixedly installed on the left side of the accumulator, and an installation joint is provided at the left end of the seventh oil pipe.

[0012] By adopting the above technical solution, the orderly connection of the third, fourth, fifth, sixth, and seventh oil pipes constructs a complete hydraulic oil circuit circulation within the test module. The third oil pipe, acting as the suction pipe, introduces the cooled and filtered clean oil from the first chamber into the second gear pump, providing a stable oil source for testing. The fourth oil pipe delivers the pressurized oil to the integrated valve block for pressure and flow regulation. The fifth oil pipe, as the return pipe, guides the oil that has completed the test cycle back to the second chamber, awaiting entry into the cooling cycle. The sixth oil pipe connects the integrated valve block to the accumulator, enabling the accumulator to respond to system pressure changes in real time, playing a role in pressure stabilization and replenishment. The mounting connector at the left end of the seventh oil pipe is used for quick connection of the valve under test, facilitating rapid assembly and disassembly of the test piece and improving the convenience of test operations. The precise layout of each oil pipe ensures the efficient and stable flow of hydraulic oil within the test module, guaranteeing smooth switching and accurate execution of pressure and flow mode tests.

[0013] In a further embodiment, a plurality of dials are fixedly installed on the top right of the rear end face of the test fixture, the dials being used to monitor the hydraulic pressure of the test station.

[0014] By adopting the above technical solution, the setting of multiple dials can monitor the hydraulic pressure data of the corresponding test station in real time. Operators can intuitively read the pressure value of each station, which makes it easy to grasp the pressure changes during the test. When the pressure fluctuates abnormally or reaches the set threshold, adjustment measures can be taken quickly to ensure that the test process is safe and controllable. At the same time, it provides direct visual data support for the analysis and recording of test results.

[0015] In a further embodiment, both the test frame and the oil tank are provided with the same protective cover, which is fixedly connected to the oil tank.

[0016] By adopting the above technical solutions, the protective cover can effectively protect the core components such as test modules, cooling mechanisms, and oil pipes inside the test frame and oil tank, preventing external dust and debris from entering and affecting the cleanliness and operational stability of the hydraulic system. At the same time, it prevents operators from accidentally coming into contact with moving parts or high-temperature oil during the test, significantly improving the operational safety of the device. In addition, the protective cover can also reduce the noise generated during equipment operation to a certain extent and improve the working environment.

[0017] In summary, this utility model has the following beneficial effects: 1. By setting up the testing module, the problem of slow testing speed in traditional independent workstations can be effectively solved, and the testing efficiency can be significantly improved to match the pace of high-speed production lines. 2. By setting up a baffle in the oil tank, the baffle can separate the first chamber and the second chamber, so that the oil is physically separated in the test cycle and the cooling cycle, avoiding the effect of uncooled oil directly participating in the test and affecting the accuracy. 3. The protective cover effectively protects against external dust and debris from entering and affecting the cleanliness and operational stability of the hydraulic system. It also prevents operators from accidentally coming into contact with moving parts or high-temperature oil during testing, significantly improving the operational safety of the device. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the present invention, used to illustrate the structural connection relationship between the test frame, oil tank, test module and cooling mechanism; Figure 2 This is a schematic diagram illustrating the interior of the fuel tank in this utility model; Figure 3 This is a schematic diagram illustrating the protective cover in this utility model.

[0019] In the diagram, 1. Test frame; 2. Oil tank; 3. Baffle; 4. First chamber; 5. Second chamber; 6. Test module; 61. Second motor; 62. Second gear pump; 63. Accumulator; 64. Integrated valve block; 65. Hydraulic filter; 7. Cooling mechanism; 71. First motor; 72. First gear pump; 73. Water-cooled heat exchanger; 8. Dial; 9. Protective cover; 10. Connector. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0022] Example 1: like Figures 1-3 As shown, a hydraulic device for testing the pressure resistance of valves includes a test frame 1, the top, left end and front end of the test frame 1 are all completely open, an oil tank 2 is fixedly installed at the bottom of the test frame 1, a partition 3 is fixedly installed inside the oil tank 2, the partition 3 divides the oil tank 2 into a first chamber 4 and a second chamber 5, multiple test modules 6 are fixedly installed at the inner top of the test frame 1, the test modules 6 are used to provide pressure mode and flow mode tests on the test piece, and a cooling mechanism 7 is fixedly installed at the right end of the inner top of the test frame 1, the cooling mechanism 7 is used to control the oil temperature of the test.

[0023] The cooling mechanism 7 includes a first motor 71, a first gear pump 72, and a water-cooled heat exchanger 73. The first motor 71 is fixedly installed at the top right rear end of the test frame 1. The axis of the first motor 71 is vertically arranged. The output axis of the first motor 71 extends downward into the second chamber 5. The first gear pump 72 is fixedly installed at the front end of the output shaft of the first motor 71. The water-cooled heat exchanger 73 is fixedly installed at the bottom end of the right end face of the oil tank 2. The axis of the water-cooled heat exchanger 73 is arranged left and right. The other end of the water-cooled heat exchanger 73 extends to the left into the first chamber 4. A first oil pipe is fixedly installed on the front side of the first gear pump 72. A second oil pipe is fixedly installed on the rear side of the first gear pump 72. The other end of the second oil pipe extends to the outside of the test frame 1 and communicates with the water-cooled heat exchanger 73.

[0024] Test module 6 includes a second motor 61, a second gear pump 62, an accumulator 63, an integrated valve block 64, and a hydraulic filter 65. The second motor 61 is fixedly installed on the inner top of the test frame 1, with its axis arranged front to back. The output shaft of the second motor 61 is fixedly installed with the second gear pump 62. The integrated valve block 64 is fixedly installed on the front side of the second gear pump 62. The hydraulic filters 65 are symmetrically fixedly installed on the left and right sides of the front end of the integrated valve block 64, with their axes arranged vertically. The accumulator 63 is fixedly installed on the top of the rear end face of the test frame 1, with its axis arranged vertically. A third oil pipe is fixedly installed on the left side of the second gear pump 62, and the other end of the third oil pipe extends downward into the first chamber 4. A fourth oil pipe is fixedly installed on the top of the second gear pump 62, and the other end of the fourth oil pipe is fixedly installed on the bottom right end of the integrated valve block 64. A fifth oil pipe is fixedly installed on the bottom left end of the integrated valve block 64, and the other end of the fifth oil pipe extends backward into the second chamber 5. A sixth oil pipe is fixedly installed on the top of the integrated valve block 64, and the other end of the sixth oil pipe is connected to the accumulator 63. A seventh oil pipe is fixedly installed on the left side of the accumulator 63, and an installation connector 10 is provided on the left end of the seventh oil pipe.

[0025] Multiple dials 8 are fixedly installed on the right top of the rear end face of the test frame 1. The dials 8 are used to monitor the hydraulic pressure of the test station. The test frame 1 and the oil tank 2 are equipped with a protective cover 9, which is fixedly connected to the oil tank 2.

[0026] Specific implementation process: The valve to be tested is fixedly installed on the connector 10. The second motor 61 and the second gear pump 62 are started. The second motor 61 drives the second gear pump 62 to run, drawing hydraulic oil from the first chamber 4 in the oil tank 2. The hydraulic oil first passes through the hydraulic filter 65 to filter impurities. The filtered hydraulic oil is pressurized and the pressure pulsation is absorbed by the accumulator 63, outputting stable high-pressure hydraulic oil. The integrated valve block 64 has a built-in oil solenoid directional valve. The directional valve is controlled by an electrical signal to distribute the high-pressure oil to the corresponding test station.

[0027] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0028] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A hydraulic device for testing the pressure resistance of valves, comprising a test frame (1), characterized in that: The top, left and front ends of the test frame (1) are completely open. An oil tank (2) is fixedly installed at the bottom of the test frame (1). A partition (3) is fixedly installed inside the oil tank (2). The partition (3) divides the oil tank (2) into a first chamber (4) and a second chamber (5). Multiple test modules (6) are fixedly installed on the inner top of the test frame (1). The test modules (6) are used to provide pressure mode and flow mode tests for the test piece. A cooling mechanism (7) is fixedly installed on the right end of the inner top of the test frame (1). The cooling mechanism (7) is used to control the oil temperature of the test.

2. The hydraulic device for testing the pressure resistance of a valve according to claim 1, characterized in that: The cooling mechanism (7) includes a first motor (71), a first gear pump (72), and a water-cooled heat exchanger (73). The first motor (71) is fixedly installed at the top right rear end of the test frame (1). The axis of the first motor (71) is vertically set. The output axis of the first motor (71) extends downward into the second chamber (5). The first gear pump (72) is fixedly installed at the front end of the output shaft of the first motor (71). The water-cooled heat exchanger (73) is fixedly installed at the bottom end of the right side of the oil tank (2). The axis of the water-cooled heat exchanger (73) is set left and right. The other end of the water-cooled heat exchanger (73) extends to the left into the first chamber (4). The first oil pipe is fixedly installed on the front side of the first gear pump (72). The second oil pipe is fixedly installed on the rear side of the first gear pump (72). The other end of the second oil pipe extends to the outside of the test frame (1) and communicates with the water-cooled heat exchanger (73).

3. A hydraulic device for testing the pressure resistance of a valve according to claim 1, characterized in that: The test module (6) includes a second motor (61), a second gear pump (62), an accumulator (63), an integrated valve block (64), and a hydraulic filter (65). The second motor (61) is fixedly installed on the inner top of the test frame (1). The axis of the second motor (61) is arranged front and back. The output shaft of the second motor (61) is fixedly installed with the second gear pump (62). The front side of the second gear pump (62) is fixedly installed with the integrated valve block (64). The front end of the integrated valve block (64) is symmetrically fixedly installed with the hydraulic filter (65). The axis of the hydraulic filter (65) is arranged vertically. The top of the rear end face of the test frame (1) is fixedly installed with the accumulator (63). The axis of the accumulator (63) is arranged vertically.

4. A hydraulic device for testing the pressure resistance of a valve according to claim 3, characterized in that: A third oil pipe is fixedly installed on the left side of the second gear pump (62), and the other end of the third oil pipe extends downward into the first chamber (4). A fourth oil pipe is fixedly installed on the top of the second gear pump (62), and the other end of the fourth oil pipe is fixedly installed on the bottom right end of the integrated valve block (64). A fifth oil pipe is fixedly installed on the bottom left end of the integrated valve block (64), and the other end of the fifth oil pipe extends backward into the second chamber (5). A sixth oil pipe is fixedly installed on the top of the integrated valve block (64), and the other end of the sixth oil pipe is connected to the accumulator (63). A seventh oil pipe is fixedly installed on the left side of the accumulator (63), and an installation connector (10) is provided on the left end of the seventh oil pipe.

5. A hydraulic device for testing the pressure resistance of a valve according to claim 1, characterized in that: Multiple dials (8) are fixedly installed on the right top of the rear end face of the test fixture (1), and the dials (8) are used to monitor the hydraulic pressure of the test station.

6. A hydraulic device for testing the pressure resistance of a valve according to claim 1, characterized in that: The test frame (1) and the oil tank (2) are provided with a protective cover (9), which is fixedly connected to the oil tank (2).

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