Hydraulic system for oil cylinder pressure maintaining test

Abstract

A hydraulic system for an oil cylinder pressure maintaining test is characterized by comprising a main valve block, a pressure sensor, a spherical valve, an oil cylinder, a first leak hunting block, a second leak hunting block and a third leak hunting block, the pressure sensor is arranged at the upper end of the main valve block, the spherical valve is arranged at the upper end of the main valve block, and the oil cylinder is arranged at the front end of the spherical valve. The oil cylinder, the spherical valve and the main valve block form a hydraulic loop through a pipeline, one side of the main valve block is provided with a first leak hunting block, and the other side of the main valve block is provided with a second leak hunting block and a third leak hunting block; the leakage position can be checked by switching the communicating valves in the different leakage detection blocks, the checking method is simple, only the ball valve needs to be opened and closed, the leakage detection blocks do not need to be disassembled and assembled, the operation is simple, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinder pressure maintenance testing, in particular to a hydraulic system used for oil cylinder pressure maintenance testing. Background Art

[0002] During the pressure-maintaining process, the hydraulic pump still outputs a relatively high pressure. If the hydraulic pump is a fixed-displacement pump, the pressure oil it outputs, except for a small part used to compensate for leakage, the rest of the pressure oil almost all flows back to the hydraulic oil tank through the overflow valve. In this way, the power loss of the pressure-maintaining transmission system is very large, and the heat is serious. It is suitable for low-power hydraulic transmission systems with short pressure-maintaining time. If the hydraulic pump is a variable pump, the output pressure of the variable pump is also relatively high during pressure-maintaining, but its output flow is almost zero. Therefore, the power loss of the hydraulic transmission system is relatively small, and the output flow can be automatically adjusted with the change of leakage, which has higher efficiency.

[0003] The components inside the existing hydraulic system are usually concentrated together, with many leakage links, and it is not easy to find the leakage location. The existing troubleshooting method is to place the components to be tested, which is cumbersome to operate. In order to solve the above problem, a hydraulic system for cylinder pressure maintenance test is proposed. Utility Model Content

[0004] In view of the above existing technical problems, the utility model provides a hydraulic system for oil cylinder pressure maintenance test, characterized in that it includes a main valve block, a pressure sensor, a ball valve, an oil cylinder, a leak detection block 1, a leak detection block 2, and a leak detection block 3. The upper end of the main valve block is provided with a pressure sensor, the upper end of the main valve block is provided with a ball valve, the front end of the ball valve is provided with an oil cylinder, the oil cylinder and the ball valve are connected to the main valve block through a pipeline to form a hydraulic circuit, a leak detection block 1 is provided on one side of the main valve block, and leak detection blocks 2 and 3 are provided on the other side of the main valve block;

[0005] The main valve block is composed of a hydraulic lock, a pressure relief valve, a safety valve, and an electromagnetic reversing valve. The front end of the hydraulic lock is connected to the ball valve, the rear end of the hydraulic lock is connected to the electromagnetic reversing valve, the outlet of the electromagnetic reversing valve is connected to the oil cylinder, and the inlet of the electromagnetic reversing valve is connected to the leak detection block 2 and the leak detection block 3 through pipelines. The rear end of the leak detection block 2 is provided with a pressure relief valve, and is connected to the ball valve through a pipeline. The rear end of the leak detection block 3 is provided with a safety valve, and is connected to the ball valve through a pipeline.

[0006] Further, the pressure sensor is located at the rear end of the pressure relief valve and the safety valve, and at the front end of the ball valve;

[0007] Furthermore, the inlet of the leak detection block 1 is connected to the outlet of the electromagnetic reversing valve through a pipeline, and the outlet of the leak detection block 1 is connected to the inlet of the hydraulic lock through a pipeline. The leak detection block 1 has a first ball valve and a second ball valve in it, one end of the first ball valve is connected to the outlet of the leak detection block 1, and the other end is connected to the outside world, and one end of the second ball valve is connected to the inlet of the leak detection block 1, and the other end is connected to the outlet of the leak detection block 1;

[0008] Further, the inlet of the leak detection block 2 is connected to the inlet of the electromagnetic reversing valve through a pipeline, and the outlet of the leak detection block 2 is connected to the inlet of the pressure relief valve through a pipeline. A third ball valve and a fourth ball valve are arranged in the leak detection block 2, one end of the third ball valve is connected to the outlet of the leak detection block 2, and the other end is connected to the outside world, and one end of the fourth ball valve is connected to the inlet of the leak detection block 2, and the other end is connected to the outlet of the leak detection block 2;

[0009] Furthermore, the inlet of the leak detection block three is connected to the inlet of the electromagnetic reversing valve through a pipeline, and the outlet of the leak detection block three is connected to the inlet of the safety valve through a pipeline. The leak detection block three contains a fifth ball valve and a sixth ball valve, one end of the fifth ball valve is connected to the outlet of the leak detection block three, and the other end is connected to the outside world, one end of the sixth ball valve is connected to the inlet of the leak detection block three, and the other end is connected to the outlet of the leak detection block three.

[0010] Beneficial effects of the utility model:

[0011] The utility model can detect the leakage position by switching the connecting valves inside different leakage detection blocks. The detection method is simple and only requires switching the ball valve without disassembling the leakage detection block. The operation is simple and the efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a hydraulic system for oil cylinder pressure maintenance testing according to the utility model;

[0013] As shown in the figure: 1- hydraulic lock, 2- pressure relief valve, 3- safety valve, 4- pressure sensor, 5- ball valve, 6- oil cylinder, 7- electromagnetic reversing valve, 8- leak detection block one, 9- leak detection block two, 10- leak detection block three, 11- main valve block, 8.1- first ball valve, 8.2- second ball valve, 9.1- third ball valve, 9.2- fourth ball valve, 10.1- fifth ball valve, 10.2- sixth ball valve. DETAILED DESCRIPTION

[0014] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] Example 1

[0018] The utility model provides a hydraulic system for a pressure-maintaining test of an oil cylinder 6, characterized in that it comprises a main valve block 11, a pressure sensor 4, a ball valve 5, an oil cylinder 6, a leak detection block 1 8, a leak detection block 2 9, and a leak detection block 3 10, wherein the pressure sensor 4 is arranged at the upper end of the main valve block 11, the ball valve 5 is arranged at the upper end of the main valve block 11, the oil cylinder 6 is arranged at the front end of the ball valve 5, the oil cylinder 6 and the ball valve 5 are connected to the main valve block 11 through a pipeline to form a hydraulic circuit, the leak detection block 1 8 is arranged at one side of the main valve block 11, and the leak detection block 2 9 and the leak detection block 3 10 are arranged at the other side of the main valve block 11;

[0019] The main valve block 11 is composed of a hydraulic lock 1, a pressure relief valve 2, a safety valve 3, and an electromagnetic reversing valve 7. The front end of the hydraulic lock 1 is connected to the ball valve 5, the rear end of the hydraulic lock 1 is connected to the electromagnetic reversing valve 7, the outlet of the electromagnetic reversing valve 7 is connected to the oil cylinder 6, and the inlet of the electromagnetic reversing valve 7 is respectively connected to the leak detection block 2 9 and the leak detection block 3 10 through pipelines. The rear end of the leak detection block 2 9 is provided with a pressure relief valve 2, and is connected to the ball valve 5 through a pipeline. The rear end of the leak detection block 3 10 is provided with a safety valve 3, and is connected to the ball valve 5 through a pipeline.

[0020] Further, the pressure sensor 4 is located at the rear end of the pressure relief valve 2 and the safety valve 3, and at the front end of the ball valve 5;

[0021] Further, the inlet of the leak detection block 8 is connected to the outlet of the electromagnetic reversing valve 7 through a pipeline, and the outlet of the leak detection block 8 is connected to the inlet of the hydraulic lock 1 through a pipeline. The leak detection block 8 has a first ball valve 8.1 and a second ball valve 8.2. One end of the first ball valve 8.1 is connected to the outlet of the leak detection block 8, and the other end is connected to the outside world. One end of the second ball valve 8.2 is connected to the inlet of the leak detection block 8, and the other end is connected to the outlet of the leak detection block 8;

[0022] Further, the inlet of the leak detection block 29 is connected to the inlet of the electromagnetic reversing valve 7 through a pipeline, and the outlet of the leak detection block 29 is connected to the inlet of the pressure relief valve 2 through a pipeline. The leak detection block 29 has a third ball valve 9.1 and a fourth ball valve 9.2. One end of the third ball valve 9.1 is connected to the outlet of the leak detection block 29, and the other end is connected to the outside world. One end of the fourth ball valve 9.2 is connected to the inlet of the leak detection block 29, and the other end is connected to the outlet of the leak detection block 29;

[0023] Furthermore, the inlet of the leak detection block three 10 is connected to the inlet of the electromagnetic reversing valve 7 through a pipeline, and the outlet of the leak detection block three 10 is connected to the inlet of the safety valve 3 through a pipeline. The leak detection block three 10 contains a fifth ball valve 10.1 and a sixth ball valve 10.2. One end of the fifth ball valve 10.1 is connected to the outlet of the leak detection block three 10, and the other end is connected to the outside world. One end of the sixth ball valve 10.2 is connected to the inlet of the leak detection block three 10, and the other end is connected to the outlet of the leak detection block three 10.

[0024] Example 2

[0025] In normal use, the first ball valve 8.1 in the leak detection block 1 8 is normally closed, the second ball valve 8.2 is normally open, the third ball valve 9.1 in the leak detection block 2 9 is normally closed, the fourth ball valve 9.2 is normally open, the fifth ball valve 10.1 in the leak detection block 3 10 is normally closed, and the sixth ball valve 10.2 is normally open. When checking the oil pressure circuit, close the ball valve 5. If the pressure of the pressure sensor 4 still drops, check whether there is leakage in the leak detection block 1 8, the leak detection block 2 9, and the leak detection block 3 10 respectively;

[0026] Close the second ball valve 8.2 to disconnect the inlet and outlet of the leak detection block 8, open the first ball valve 8.1 to connect the outlet of the leak detection block 8 to the outside, and observe whether there is hydraulic oil leakage from the pipeline leading to the outside. If so, the valve has a leakage problem;

[0027] Close the fourth ball valve 9.2 to disconnect the inlet and outlet of the leak detection block 2 9, open the third ball valve 9.1 to connect the outlet of the leak detection block 2 9 to the outside, and observe whether there is hydraulic oil leakage from the pipeline leading to the outside. If so, the valve has a leakage problem;

[0028] Close the sixth ball valve 10.2 to disconnect the inlet and outlet of the leak detection block 3 10, open the fifth ball valve 10.1 to connect the outlet of the leak detection block 3 10 to the outside, and observe whether there is hydraulic oil leakage from the pipeline leading to the outside. If so, the valve has a leakage problem.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydraulic system for cylinder pressure holding test, characterized in that: It includes a main valve block, a pressure sensor, a ball valve, an oil cylinder, a leak detection block 1, a leak detection block 2, and a leak detection block 3. The pressure sensor is arranged on the upper end of the main valve block, the ball valve is arranged on the upper end of the main valve block, the oil cylinder is arranged at the front end of the ball valve, the oil cylinder and the ball valve form a hydraulic circuit with the main valve block through a pipeline, the leak detection block 1 is arranged on one side of the main valve block, and the leak detection block 2 and the leak detection block 3 are arranged on the other side of the main valve block.

2. A hydraulic system for cylinder pressure holding test according to claim 1, characterized in that: The main valve block is composed of a hydraulic lock, a pressure relief valve, a safety valve, and an electromagnetic reversing valve. The front end of the hydraulic lock is connected to the spherical valve, the rear end of the hydraulic lock is connected to the electromagnetic reversing valve, the outlet of the electromagnetic reversing valve is connected to the oil cylinder, and the inlet of the electromagnetic reversing valve is connected to the leak detection block two and the leak detection block three through pipelines. A pressure relief valve is set at the rear end of the leak detection block two and is connected to the spherical valve through a pipeline. A safety valve is set at the rear end of the leak detection block three and is connected to the spherical valve through a pipeline.

3. A hydraulic system for cylinder pressure holding test according to claim 2, characterized in that: The pressure sensor is located at the rear ends of the pressure relief valve and the safety valve, and at the front end of the spherical valve.

4. A hydraulic system for cylinder pressure holding test according to claim 3, characterized in that: The inlet of the leak detection block 1 is connected to the outlet of the electromagnetic reversing valve through a pipeline, and the outlet of the leak detection block 1 is connected to the inlet of the hydraulic lock through a pipeline. The leak detection block 1 contains a first ball valve and a second ball valve, one end of the first ball valve is connected to the outlet of the leak detection block 1, and the other end is connected to the outside world, one end of the second ball valve is connected to the inlet of the leak detection block 1, and the other end is connected to the outlet of the leak detection block 1.

5. A hydraulic system for cylinder pressure-maintaining test according to claim 4, characterized in that: The inlet of the leak detection block 2 is connected to the inlet of the electromagnetic reversing valve through a pipeline, and the outlet of the leak detection block 2 is connected to the inlet of the pressure relief valve through a pipeline. A third ball valve and a fourth ball valve are arranged in the leak detection block 2, one end of the third ball valve is connected to the outlet of the leak detection block 2, and the other end is connected to the outside world, and one end of the fourth ball valve is connected to the inlet of the leak detection block 2, and the other end is connected to the outlet of the leak detection block 2.

6. A hydraulic system for cylinder pressure-maintaining test according to claim 5, characterized in that: The inlet of the leak detection block three is connected to the inlet of the electromagnetic reversing valve through a pipeline, and the outlet of the leak detection block three is connected to the inlet of the safety valve through a pipeline. The leak detection block three contains a fifth ball valve and a sixth ball valve, one end of the fifth ball valve is connected to the outlet of the leak detection block three, and the other end is connected to the outside world, one end of the sixth ball valve is connected to the inlet of the leak detection block three, and the other end is connected to the outlet of the leak detection block three.

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