Leakage checking device of hydraulic pressure maintaining loop

Abstract

A leakage checking device of a hydraulic pressure maintaining loop is characterized in that a leakage checking block A is additionally arranged behind a hydraulic lock, a leakage checking block B is additionally arranged behind a pressure relief valve, and a leakage checking block C is additionally arranged behind a safety valve, so that once hydraulic oil leakage is found, the leakage checking block A, the leakage checking block B and the leakage checking block C can be sequentially disassembled, and whether the leakage position is the hydraulic lock, the pressure relief valve or the safety valve can be judged; according to the design, the leakage point checking method is simple and easy to operate, the structural design is simple, faults are not prone to occurring, and accurate leakage points can be found rapidly.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage detection of hydraulic pressure maintaining circuits, in particular to a leakage detection device for a hydraulic pressure maintaining circuit. Background Art

[0002] The function of a pressure-holding circuit is to maintain a stable pressure in a hydraulic transmission system even when the hydraulic cylinder is stationary or when slight displacement occurs due to workpiece deformation. Two key indicators of pressure-holding performance are pressure stability and pressure-holding time. During the pressure-holding process, the hydraulic pump maintains a high output pressure. If the hydraulic pump is a fixed-displacement pump, almost all of the pressure oil it outputs, with a small portion used to compensate for leakage, flows back to the hydraulic tank through the relief valve. This results in significant power loss and heat generation in the fluctuating pressure transmission system, making it suitable for low-power hydraulic transmission systems with short pressure-holding times. If the hydraulic pump is a variable-displacement pump, the output pressure remains relatively high during the pressure-holding process, but the output flow rate is almost zero. This minimizes power loss in the hydraulic transmission system and allows the system to automatically adjust the output flow rate according to changes in leakage, resulting in high efficiency. Therefore, a leak in the hydraulic pressure-holding circuit will lead to unstable pressure, impacting performance.

[0003] During use, once a pressure leak occurs, it is necessary to first find the pressure leak point and then proceed to the next repair operation. However, multiple components are integrated together, and there are too many links where leakage is prone to occur, making it difficult to find the leak location. Utility Model Content

[0004] In response to the above technical problems, the present invention provides a device which is characterized by comprising a main valve block, an oil cylinder, a pressure sensor, and a ball valve. One side of the oil cylinder is connected to the ball valve through a pipeline, and the other side of the ball valve is connected to the main valve block through a pipeline, and the other side of the main valve block is connected to the pressure sensor through a pipeline.

[0005] The main valve block is composed of a hydraulic lock, a pressure relief valve, a safety valve, an electromagnetic reversing valve, a leak detection block A, a leak detection block B, and a leak detection block C. The ball valve is connected to the hydraulic lock through a pipeline. One side of the hydraulic lock is connected to the electromagnetic reversing valve through a pipeline. The leak detection block A is installed on the pipeline. The ball valve is connected to the pressure relief valve through a pipeline. The pressure relief valve is connected to the electromagnetic reversing valve through a pipeline. The leak detection block B is installed on the pipeline. The ball valve is connected to the safety valve through a pipeline. The leak detection block C is installed on the pipeline.

[0006] After the ball valve is closed, if the pressure sensor pressure still drops, remove the leak detection block A, and the hydraulic oil flows out from the connection port, then there is a leakage problem in the hydraulic lock.

[0007] After the ball valve is closed, if the pressure sensor pressure still drops, remove the leak detection block B, and the hydraulic oil flows out from the interface, then there is a leakage problem in the pressure relief valve.

[0008] After the ball valve is closed, if the pressure of the pressure sensor still drops, remove the leak detection block C, and the hydraulic oil flows out from the interface, then there is a leakage problem in the safety valve.

[0009] Beneficial effects of the utility model:

[0010] The utility model installs a leak detection block A behind the hydraulic lock, a leak detection block B behind the pressure relief valve, and a leak detection block C behind the safety valve. Once a hydraulic oil leakage is found, the leak detection block A, the leak detection block B, and the leak detection block C can be disassembled in sequence to determine whether the leakage occurs at the hydraulic lock, the pressure relief valve, or the safety valve. This design has a simple method for checking the leakage point, is easy to operate, and has a simple structural design, is not prone to malfunction, and can quickly find the exact leakage point. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of a leakage detection device for a hydraulic pressure maintaining circuit according to the present invention;

[0012] 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. Solenoid reversing valve, 8. Leak detection block A, 9. Leak detection block B, 10. Leak detection block C. DETAILED DESCRIPTION

[0013] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0014] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of the present invention, 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 internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] Example 1

[0017] like Figure 1 As shown, a ball valve 5 is installed on the side of the oil cylinder 6, and the ball valve 5 is connected to the pressure sensor 4 through a pipeline. The ball valve 5 is connected to the hydraulic lock 1 through a pipeline. The hydraulic lock 1 is connected to the electromagnetic reversing valve 7 through a pipeline. A leak detection block A8 is installed on the pipeline. The ball valve 5 is connected to the pressure relief valve 2 through a pipeline. The pressure relief valve 2 is connected to the electromagnetic reversing valve 7 through a pipeline. A leak detection block B9 is installed on the pipeline. The ball valve 5 is connected to the safety valve 3 through a pipeline. The safety valve 3 is connected to the electromagnetic reversing valve 7 through a pipeline. A leak detection block C10 is installed on the pipeline.

[0018] Example 2

[0019] After the ball valve 5 is closed, if the pressure of the pressure sensor 4 still drops, remove the leak detection block A8. At this time, hydraulic oil flows out from the connection port, indicating that there is a hydraulic oil leakage in the hydraulic lock 1. If no hydraulic oil flows out, it means that there is no leakage in the hydraulic lock 1.

[0020] Example 2

[0021] After the ball valve 5 is closed, if the pressure of the pressure sensor 4 still drops, it is determined that there is no hydraulic oil leakage in the hydraulic lock 1. Remove the leak detection block B9. At this time, hydraulic oil flows out from the connecting port, which indicates that there is a leakage problem in the pressure relief valve 2. If no hydraulic oil flows out, it indicates that there is no leakage in the pressure relief valve 2.

[0022] Example 3

[0023] After the ball valve 5 is closed, if the pressure of the pressure sensor 4 still drops, and it has been determined that there is no hydraulic oil leakage in the hydraulic lock 1 and the pressure relief valve 2, remove the leak detection block C10. At this time, hydraulic oil flows out from the connection port, indicating that there is a leakage problem in the safety valve 3. If no hydraulic oil flows out, it means that there is no leakage in the safety valve 10.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. The various components mentioned in the present invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in this utility model is defined by the appended claims and their equivalents.

Claims

1. A leakage detection device for a hydraulic pressure maintaining circuit, characterized in that It consists of a main valve block, an oil cylinder, a pressure sensor, and a ball valve. One side of the oil cylinder is connected to the ball valve through a pipeline, and the ball valve is connected to the main valve block through a pipeline. The main valve block is connected to the pressure sensor through a pipeline. The main valve block consists of a hydraulic lock, a pressure relief valve, a safety valve, an electromagnetic reversing valve, a leak detection block A, a leak detection block B, and a leak detection block C. The ball valve is connected to the hydraulic lock through a pipeline, and one side of the hydraulic lock is connected to the electromagnetic reversing valve through a pipeline. Leak detection block A is installed on the pipeline. The ball valve and the pressure relief valve are connected through a pipeline, and the pressure relief valve is connected to the electromagnetic reversing valve through a pipeline. Leak detection block B is installed on the pipeline. The ball valve and the safety valve are connected through a pipeline, and leak detection block C is installed on the pipeline.

Images