Leakage detection and pressure maintaining experimental platform for header hydraulic system

Abstract

The utility model relates to the technical field of header hydraulic system detection, in particular to a header hydraulic system leak detection and pressure maintaining experiment platform. Comprising an oil tank, and an electric control box is arranged on the top surface of the oil tank; a plurality of variable plunger oil pumps are further arranged on the surface of the top of the oil tank, oil inlets of the variable plunger oil pumps are connected with the oil tank, and oil outlets of the variable plunger oil pumps are connected with a header hydraulic system through a valve set. According to the invention, the test operation of automatic pressing and pressure-maintaining leak detection of the header hydraulic system can be realized, and the accuracy of the test result is high.

Description

Technical Field

[0001] The utility model relates to the technical field of detection of hydraulic systems of cutting platforms, in particular to a leak detection and pressure maintenance experimental platform for hydraulic systems of cutting platforms. Background Art

[0002] In order to keep the medium pressure in the hydraulic system of the cutting platform at a certain pressure value, it is necessary to set up a pressure maintaining and pressure relief device to detect the hydraulic system of the cutting platform to ensure the accuracy of the operation of the hydraulic system of the cutting platform and the stability of the movement.

[0003] The existing pressure maintaining and pressure relief equipment used in the hydraulic system of the cutting platform has unstable pressure maintaining pressure, difficult to read test data, low safety factor, poor overall test result accuracy, small detection range, low work efficiency, and low degree of automation. Summary of the Invention

[0004] The purpose of the utility model is to overcome the above-mentioned defects of the prior art and propose a cutting platform hydraulic system leak detection and pressure maintenance test platform, which can realize the experimental operation of automatic pressurization and pressure maintenance of the cutting platform hydraulic system for leak detection, and the test results are highly accurate.

[0005] The technical solution of the utility model is: a leak detection and pressure maintenance test platform for a cutting platform hydraulic system, comprising an oil tank, wherein an electric control box is provided on the top surface of the oil tank;

[0006] Several variable plunger oil pumps are also provided on the top surface of the oil tank. The oil inlet of the variable plunger oil pump is connected to the oil tank, and the oil outlet of the variable plunger oil pump is connected to the cutting platform hydraulic system through a valve group.

[0007] In the utility model, the oil tank is in the shape of a rectangular box, the top of the oil tank is provided with an oil inlet, the oil inlet is provided with a filter screen; the lower part of the oil tank is provided with an oil drain port; the side of the oil tank is provided with an oil tank scale.

[0008] The oil inlet of the variable plunger oil pump is provided with an oil suction port and a flow regulating valve, and the oil outlet of the variable plunger oil pump is connected to the valve group;

[0009] The variable piston oil pump is also provided with an oil return port, which is connected to the oil tank.

[0010] The valve group is provided with an oil pump outlet interface, which is connected to the oil outlet of the variable plunger oil pump, and a one-way valve is provided at the oil pump outlet interface;

[0011] The valve body is provided with an oil supply port and an oil drain port. The oil supply port is connected to the hydraulic system of the cutting platform. A pressure regulating valve is provided at the oil supply port. The hydraulic oil drawn by the variable plunger oil pump is injected into the hydraulic system of the cutting platform through the oil supply port.

[0012] A throttle valve is provided at the oil drain port, and the hydraulic oil in the hydraulic system of the cutting platform flows out through the oil drain port;

[0013] The valve body is also provided with a two-position two-way plug-in solenoid valve, which controls the opening and closing of the oil pump outlet interface and the oil drain port.

[0014] The electric control box is electrically connected to the variable plunger oil pump and the valve group respectively.

[0015] A digital pressure gauge is provided on the operation panel of the electric control box, and a digital pressure gauge interface is correspondingly provided on the valve group. The digital pressure gauge is connected to the digital pressure gauge interface to display the pressure of the cutting platform hydraulic system in real time.

[0016] The operation panel of the electric control box is provided with a solenoid valve switch, which controls the action of the two-position two-way plug-in solenoid valve.

[0017] A time relay is provided on the operation panel of the electric control box, and the pressure maintaining and leak detection time of the cutting platform hydraulic system is set and controlled by the time relay.

[0018] The operating panel of the electric control box is provided with a conversion switch to realize the single pressure working mode or the continuous fatigue pressure working mode of the experimental platform.

[0019] The beneficial effects of the utility model are:

[0020] (1) The experimental platform has high integration and is easy to install and operate;

[0021] (2) This application uses a variable plunger oil pump, which can be applied to the leakage detection and pressure maintenance test of various types of oil cylinders in the hydraulic system of the cutting platform, thus expanding the detection range of the experimental platform;

[0022] (3) Through this experimental platform, the automatic pressure application and pressure maintenance operation in the process of leak detection of the hydraulic system of the cutting platform is realized; it can realize both single pressure application and pressure maintenance detection of the hydraulic system of the cutting platform and continuous multiple pressure application and pressure maintenance fatigue detection of the hydraulic system of the cutting platform;

[0023] (4) The experimental platform can be used to easily read the pressure value of the hydraulic system of the cutting platform during the pressure maintenance process. The test results are highly accurate and are equipped with an alarm light, which has a high safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the experimental platform of the utility model;

[0025] Figure 2 It is a structural diagram of the electric control box;

[0026] Figure 3 It is a structural diagram of the valve group.

[0027] In the figure: 1 electric control box; 101 digital pressure gauge; 102 voltmeter; 103 power indicator light; 104 emergency stop button; 105 changeover switch; 106 stop button; 107 run button; 108 solenoid valve switch; 109 ammeter; 110 control circuit switch; 111 time relay; 112 box body; 113 lower limit warning light; 2 oil pump base; 3 oil tank; 4 oil tank scale; 5 bracket; 7 valve group; 701 two-position two-way plug-in solenoid valve; 702 throttle valve; 703 digital pressure gauge interface; 704 oil drain port; 705 oil supply port; 706 pressure regulating valve; 707 oil pump outlet port interface; 708 one-way valve; 8 oil drain port; 9 filter screen; 10 oil suction port; 11 flow regulating valve; 12 oil return port; 13 oil outlet; 14 variable piston oil pump. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] The following description sets forth specific details to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art may make similar generalizations without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] like Figure 1 As shown, the leak detection and pressure maintenance experimental platform for the hydraulic system of the cutting platform described in the present invention includes an electric control box 1, an oil tank 3, a variable plunger oil pump 14 and a valve group 7. In order to realize the integrated setting of the experimental platform, the oil tank 3 is in the shape of a closed rectangular box, and the oil tank 3 is filled with hydraulic oil for leak detection of the hydraulic system of the cutting platform. The electric control box 1 is fixed on one side of the top surface of the oil tank 3. In this embodiment, the electric control box 1 is arranged along one side of the top surface of the oil tank. Several variable plunger oil pumps 14 are fixed on the top surface of the electric control box 1, and the variable plunger oil pumps 14 are respectively connected to the hydraulic system of the cutting platform through the valve group 7. Therefore, the experimental platform can realize the leak detection and pressure maintenance of multiple hydraulic systems of the cutting platform at the same time.

[0031] In this embodiment, two variable displacement plunger oil pumps 14 are spaced apart on the top surface of the electrical control box 1. These variable displacement plunger oil pumps 14 are secured to the fuel tank 3 via a pump base 4. The oil inlet of the variable displacement plunger oil pump 14 is connected to the fuel tank 3, while the oil outlet of the variable displacement plunger oil pump 14 is connected to the oil inlet of the header hydraulic system via a valve block 7. The valve block 7 is secured to the fuel tank 3 via a bracket 5.

[0032] The top surface of the fuel tank 3 is equipped with an oil inlet. Hydraulic oil used for leak detection in the header hydraulic system enters the fuel tank 3 through the oil inlet. A filter 9 is installed at the oil inlet to filter the hydraulic oil and prevent impurities from entering the fuel tank 3. The hydraulic oil in the fuel tank 3 needs to be replaced regularly. A drain port 8 is provided at the bottom of the fuel tank 3. The hydraulic oil in the fuel tank 3 flows out of the fuel tank through the drain port 8. A fuel tank gauge 4 is installed on the side wall of the fuel tank 3. The gauge 4 clearly displays the hydraulic oil level in the fuel tank 3. When the gauge 4 indicates that the hydraulic oil level in the fuel tank 3 is low, it is necessary to promptly refill the fuel tank with hydraulic oil.

[0033] The variable plunger oil pump 14 is provided with an oil suction port 10 and a flow regulating valve 11 at the oil inlet. Under the action of the oil suction port 10, the hydraulic oil in the oil tank 3 is sucked into the variable plunger oil pump 14, and the flow of the hydraulic oil is controlled by the flow regulating valve 11, thereby controlling the supply of the hydraulic oil. The oil outlet 13 of the variable plunger oil pump 14 is connected to the valve group through a connecting pipe. At the same time, in order to prevent a high-pressure environment from occurring in the variable plunger oil pump 14, the oil return port 12 on the variable plunger oil pump 14 is connected to the oil tank 3 through a connecting pipe. The leaked oil generated in the variable plunger oil pump 14 flows into the oil tank 3 through the oil return port 12 to ensure the normal operation of the variable plunger oil pump.

[0034] like Figure 3 As shown, the valve block includes a valve body with an oil pump outlet port 707 provided thereon. This port connects the valve block to the oil outlet of the variable displacement piston pump 14. A check valve 708 is provided at this port. When the variable displacement piston pump is not operating, the hydraulic system of the header is maintained under pressure. This check valve 708 effectively prevents the hydraulic oil in the header hydraulic system from flowing back into the fuel tank 3.

[0035] The valve body is equipped with an oil supply port 705, which is connected to the header hydraulic system via a connecting pipeline. A pressure regulating valve 706 is installed at this port to regulate the pressure of the hydraulic oil entering the header hydraulic system. The valve body is also equipped with a digital pressure gauge port 703, which is connected to the electrical control box 1. The pressure within the valve block 7 and the header hydraulic system can be displayed in real time on the electrical control box 1, allowing operators to accurately grasp the pressure value in real time and ensure safety during leak detection.

[0036] An oil drain port 704 is provided at the bottom of the valve body, and a throttle valve 702 is also provided on the corresponding valve body. After the pressurization and pressure maintenance process of the cutter hydraulic system is completed, the hydraulic oil injected into the cutter hydraulic system for leak detection needs to be discharged, and the throttle valve 702 can control the discharge speed of the hydraulic oil.

[0037] To enable the valve block to automatically inject, pressurize, and drain the header hydraulic system, a two-position, two-way plug-in solenoid valve 701 is installed on the valve body. When the header hydraulic system needs to be injected and pressurized, the hydraulic oil, after being pressurized by the variable displacement plunger pump 14, flows out of the oil outlet 13, passes through the one-way valve 708, and then flows into the header hydraulic system through the oil supply port 705. When the header hydraulic system's pressure maintenance and leak detection process is complete, the two-position, two-way plug-in solenoid valve 701 controls the oil drain port 704, allowing the hydraulic oil used for leak detection to be discharged from the header hydraulic system.

[0038] like Figure 3 As shown, the electric control box 1 includes a box body 112, and a digital pressure gauge 101 is provided on the operation panel of the box body 112. The digital pressure gauge 101 is connected to the digital pressure gauge interface 703 on the valve group. The digital pressure gauge 101 can display the pressure of the cutting platform hydraulic system during the pressurization and pressure maintenance process, as well as the set upper and lower pressure limits in real time.

[0039] The operating panel of box 112 is equipped with a voltmeter 102 and an ammeter 109, which display the voltage and current of the variable piston oil pump 14 during power-on operation. The panel also houses a solenoid valve switch 108, which controls the two-position, two-way plug-in solenoid valve 701. The panel also houses a control circuit switch 110 and a time relay 111. The control circuit switch 110 controls the power supply to the entire experimental platform, while the time relay 111 measures the pressure-maintaining period of the header hydraulic system.

[0040] In addition, the operating panel of the housing 112 is equipped with a power indicator light 103, an emergency stop button 104, a stop button 106, and a run button 107. The run button 107, stop button 106, and lower limit alarm light 113 control the operation and shutdown of the experimental platform. During the experiment, if a malfunction occurs, the emergency stop button 104 can be used to urgently shut down the experimental platform to ensure the safety of the leak detection process. The operating panel of the housing 112 is also equipped with a transfer switch 105, which allows the experimental platform to switch between two operating modes: a single pressure test and a continuous multiple pressure test, i.e., a fatigue test.

[0041] The operating process of this experimental platform is as follows. To start, turn on the control circuit switch 110, the power indicator 103 illuminates, and the electronic control system is powered. By turning the selector switch 105, select between single-shot and continuous (fatigue) pressure testing modes. The time relay 111 is set to adjust the pressure hold time during the leak detection process. The run button 107 is pressed to begin the pressure test. At this point, the variable displacement piston pump 14 activates, pumping hydraulic oil from the oil tank 3 to control the pressure. The pressure is then injected into the header hydraulic system through the valve block 7. During the pressure test, the pressure within the header hydraulic system gradually increases, and this pressure value is displayed on the digital pressure gauge 101.

[0042] When the pressure reaches the upper limit, the pressure displayed on the digital pressure gauge 101 reaches the set upper limit. The main control circuit of the variable plunger pump 14 is automatically disconnected, and the variable plunger pump stops supplying pressure. The pressure-increasing process ends, and the leak detection and pressure-holding period begins. Time relay 111 begins timing. If the pressure in the header hydraulic system does not drop to the lower pressure limit within the pressure-holding period, the header hydraulic system passes the leak detection and pressure-holding process. The pressure-holding period is controlled by time relay 111. At the end of the pressure-holding period, the 2-position 2-way plug-in solenoid valve 401 opens, and the pressure relief process begins. The hydraulic oil in the header hydraulic system flows back into the valve block and out through the drain port 704. As the hydraulic oil flows back, the hydraulic cylinder in the header hydraulic system gradually retracts. Position sensors installed at the cylinders monitor the retracted position in real time. When the cylinders are fully retracted, the 2-position 2-way plug-in solenoid valve 108 automatically disconnects the control circuit, and the pressure-holding and leak detection process for the header hydraulic system ends.

[0043] The above is the working process of the single suppression working mode.

[0044] When a continuous (fatigue) pressure test is required on the header hydraulic system, the switch 105 is turned to select the continuous (fatigue) pressure test mode. After a single pressure-holding cycle, when the hydraulic cylinders in the header hydraulic system are fully retracted, the position sensor located at the cylinders detects their positions in real time. The position sensor then sends a signal to re-activate the main control circuit of the variable piston pump 14, automatically repeating the pressure-holding and pressure-suppression cycles. Repeating these steps multiple times allows for a continuous pressure-holding fatigue test of the header hydraulic system.

[0045] The above is a detailed introduction to the leak detection and pressure maintenance test platform for the hydraulic system of the cutting platform provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The above description of the disclosed embodiments enables professionals in this field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals in this field, and the general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this article, but will conform to the widest scope consistent with the principles and novel features disclosed in this article.

Claims

1. A leak detection and pressure maintenance test platform for a header hydraulic system, comprising an oil tank, characterized in that: An electric control box is provided on the top surface of the oil tank; Several variable plunger oil pumps are also provided on the top surface of the oil tank. The oil inlet of the variable plunger oil pump is connected to the oil tank, and the oil outlet of the variable plunger oil pump is connected to the cutting platform hydraulic system through a valve group.

2. The leak detection and pressure maintenance test platform for the header hydraulic system according to claim 1 is characterized in that: The oil tank is in the shape of a rectangular box, with an oil inlet on the top and a filter screen at the oil inlet; an oil drain port at the bottom of the oil tank; and an oil tank scale on the side of the oil tank.

3. The leak detection and pressure maintenance test platform for the header hydraulic system according to claim 1 is characterized in that: The oil inlet of the variable plunger oil pump is provided with an oil suction port and a flow regulating valve, and the oil outlet of the variable plunger oil pump is connected to the valve group; The variable piston oil pump is also provided with an oil return port, which is connected to the oil tank.

4. The leak detection and pressure maintenance test platform for the header hydraulic system according to claim 1, characterized in that: The valve group is provided with an oil pump outlet interface, which is connected to the oil outlet of the variable plunger oil pump, and a one-way valve is provided at the oil pump outlet interface; The valve body is provided with an oil supply port and an oil drain port. The oil supply port is connected to the hydraulic system of the cutting platform. A pressure regulating valve is provided at the oil supply port. The hydraulic oil drawn by the variable plunger oil pump is injected into the hydraulic system of the cutting platform through the oil supply port. A throttle valve is provided at the oil drain port, and the hydraulic oil in the hydraulic system of the cutting platform flows out through the oil drain port; The valve body is also provided with a two-position two-way plug-in solenoid valve, which controls the opening and closing of the oil pump outlet interface and the oil drain port.

5. The leak detection and pressure maintenance test platform for the header hydraulic system according to claim 4, characterized in that: The electric control box is electrically connected to the variable plunger oil pump and the valve group respectively.

6. The leak detection and pressure maintenance test platform for the header hydraulic system according to claim 5, characterized in that: A digital pressure gauge is provided on the operation panel of the electric control box, and a digital pressure gauge interface is correspondingly provided on the valve group. The digital pressure gauge is connected to the digital pressure gauge interface to display the pressure of the cutting platform hydraulic system in real time.

7. The leak detection and pressure maintenance test platform for the header hydraulic system according to claim 5, characterized in that: The operation panel of the electric control box is provided with a solenoid valve switch, which controls the action of the two-position two-way plug-in solenoid valve.

8. The leak detection and pressure maintenance test platform for the header hydraulic system according to claim 5, characterized in that: A time relay is provided on the operation panel of the electric control box, and the pressure maintaining and leak detection time of the cutting platform hydraulic system is set and controlled by the time relay.

9. The leak detection and pressure maintenance test platform for the header hydraulic system according to claim 5, characterized in that: The operating panel of the electric control box is provided with a conversion switch to realize the single pressure working mode or the continuous fatigue pressure working mode of the experimental platform.

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