Automatic exhaust device of hydraulic oil tank

Abstract

The utility model discloses an automatic exhaust device for a hydraulic oil tank, which comprises a controller, the controller is arranged on the inner side of a master control system monitor of an excavator, the controller is electrically connected with a control switch through a lead, the controller is electrically connected with a display through a lead, and the controller is electrically connected with an exhaust electromagnetic valve through a lead. The exhaust electromagnetic valve is connected with a hydraulic oil tank through a pipeline, the side wall of the hydraulic oil tank is connected with an air pressure sensor, and the air pressure sensor is electrically connected with the controller through a wire.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, specifically to an automatic venting device for hydraulic oil tanks. Background Technology

[0002] An excavator, also known as a digging machine or a soil excavator, is an earthmoving machine that uses a bucket to dig materials above or below the machine's bearing surface and load them into transport vehicles or unload them into a stockpile. There are many types of excavators, including mining excavators. When the hydraulic system of a mining excavator needs maintenance or disassembly, the hydraulic system of the entire machine needs to be depressurized. Releasing the pressure in the hydraulic oil tank is a very important step in this process. The conventional way to release the pressure is for the operator to press and hold the breather valve of the hydraulic oil tank to achieve the venting process.

[0003] Because the breather valve of the hydraulic oil tank of mining excavators is installed high up, it is inconvenient for operators to get up and down, posing a high risk. It is also difficult to manually vent the air and it is impossible to confirm whether the pressure inside the hydraulic oil tank is within the normal range. If the air pressure inside the oil tank is too high when the hydraulic system is disassembled, it can lead to a serious accident.

[0004] Therefore, designing a device that simplifies exhaust operation, enables quick exhaust, and improves safety is the problem the inventors wanted to solve. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an automatic venting device for hydraulic oil tanks, which can simplify the venting operation, facilitate venting, and improve the safety factor.

[0006] The technical solution adopted by this utility model device is: an automatic hydraulic oil tank venting device, including a controller, the controller being installed inside the main control system monitor of the excavator, the controller being electrically connected to a control switch via a wire, the controller being electrically connected to a display via a wire, the controller being electrically connected to an venting solenoid valve via a wire, the venting solenoid valve being connected to a hydraulic oil tank via a pipeline, and a pressure sensor being connected to the side wall of the hydraulic oil tank, the pressure sensor being electrically connected to the controller via a wire.

[0007] Furthermore, the probe of the pressure sensor is mounted on the inner wall of the hydraulic oil tank.

[0008] Furthermore, under normal conditions, the pressure sensor does not come into contact with the hydraulic oil in the hydraulic tank.

[0009] Furthermore, it includes a pressure relief valve, which is electrically connected to the controller via a wire and connected to the hydraulic oil tank via a pipeline.

[0010] Furthermore, the controller is electrically connected to a normally closed solenoid valve via a wire, and the normally closed solenoid valve is connected to a hydraulic oil tank via a pipeline.

[0011] Furthermore, the controller is electrically connected to an alarm via wires, and the alarm includes an alarm light and a buzzer.

[0012] Furthermore, the alarm light and buzzer are electrically connected to the controller via wires.

[0013] The beneficial effects of this utility model device are:

[0014] 1. This utility model uses a pressure sensor to detect the pressure of the hydraulic oil tank, provides feedback based on the set value, and controls the exhaust solenoid valve to release pressure through a control switch. It eliminates the need to climb to a high place to manually operate the breather valve to release pressure, making it safe and reliable. It simplifies the venting operation, enables quick venting, and improves the safety factor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of this utility model.

[0018] Explanation of reference numerals in the attached diagram: 1-Controller; 2-Display; 3-Control switch; 4-Alarm; 5-Pressure sensor; 6-Hydraulic oil tank; 7-Exhaust solenoid valve; 8-Pressure relief valve; 9-Normally closed solenoid valve. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0020] Example 1: See Figure 1This is a schematic diagram of the structure of Embodiment 1 of this utility model. An automatic venting device for a hydraulic oil tank 6 includes a controller 1. The controller 1 is located inside the main control system monitor of the excavator and is a standard control element of the excavator. The controller 1 is electrically connected to a control switch 3 via wires. The control switch 3 controls the venting solenoid valve 7. The control switch 3 is a push-button type contact switch. The controller 1 is electrically connected to a display 2 via wires. The display 2 displays the real-time pressure value inside the hydraulic oil tank 6, as well as the high-pressure alarm value Y and low-pressure alarm value X preset by the controller 1. The controller 1 is electrically connected to the venting solenoid valve 7 via wires. The venting solenoid valve 7 is connected to the hydraulic oil tank 6 via a pipeline. A pressure sensor 5 is connected to the side wall of the hydraulic oil tank 6. The pressure sensor 5 is electrically connected to the controller 1 via wires. The controller 1 is electrically connected to an alarm 4 via wires. The alarm 4 includes an alarm light and a buzzer, which are electrically connected to the controller 1 via wires. The probe of the pressure sensor 5 is located on the inner side wall of the hydraulic oil tank 6. Under normal conditions, the pressure sensor 5 does not contact the hydraulic oil inside the hydraulic oil tank 6.

[0021] When the pressure value detected by the air pressure sensor 5 in the hydraulic oil tank 6 exceeds Y or falls below X, a red warning icon flashes on the display 2, and the alarm 4 flashes and sounds, reminding the driver that the pressure value is too high and that emergency handling and maintenance are required. After the driver stops the machine, he can manually operate the exhaust solenoid valve 7 to release the air by pressing the control switch 3, or he can stop the machine for maintenance.

[0022] Example 2: Based on the above examples, this utility model also includes a pressure relief valve 8. The function of the pressure relief valve 8 is to automatically relieve pressure when the pressure inside the container reaches a specified set value. The pressure relief valve 8 is electrically connected to the controller 1 through a wire and is connected to the hydraulic oil tank 6 through a pipeline. In order to deal with the situation where no one manually controls the pressure relief for a long time and the pressure continues to rise, the pressure relief valve 8 is set to relieve pressure in the hydraulic oil tank 6 when the pressure exceeds the value B as an emergency treatment. The set value B is higher than the high pressure alarm value Y.

[0023] Example 3: Based on the above examples, further improvements are made and the safety factor is increased. A normally closed solenoid valve 9 is electrically connected to the controller 1 via a wire. The normally closed solenoid valve 9 is connected to the hydraulic oil tank 6 via a pipeline. The normally closed solenoid valve 9 is automatically controlled by the controller 1. When the pressure reaches the set value A, it automatically opens to release pressure. If the set value A is lower than the set value B but higher than the high-pressure alarm value Y, and the pressure in the hydraulic oil tank 6 exceeds the high-pressure alarm value Y and there is no manual pressure release for a certain period of time, the controller 1 automatically controls the normally closed solenoid valve 9 to open to release pressure and protect the hydraulic system.

[0024] This utility model uses a pressure sensor 5 to detect the pressure of the hydraulic oil tank 6, and provides feedback based on the set value. It then controls the exhaust solenoid valve 7 through the control switch 3 to release pressure. This eliminates the need to climb to a high place to manually operate the breather valve to release pressure, ensuring safety and reliability. It simplifies the venting operation, enables quick venting, and improves the safety factor.

Claims

1. A hydraulic oil tank automatic exhaust device comprising a controller (1) which is provided inside a main control system monitor of a shovel, characterized in that: The controller (1) is electrically connected with a control switch (3) through a wire, the controller (1) is electrically connected with a display (2) through a wire, the controller (1) is electrically connected with an exhaust electromagnetic valve (7) through a wire, the exhaust electromagnetic valve (7) is connected with a hydraulic oil tank (6) through a pipeline, a side wall of the hydraulic oil tank (6) is connected with an air pressure sensor (5), the air pressure sensor (5) is electrically connected with the controller (1) through a wire.

2. The automatic hydraulic tank venting device according to claim 1, wherein: The probe of the air pressure sensor (5) is arranged on the inner side wall of the hydraulic oil tank (6).

3. The automatic hydraulic tank venting device according to claim 2, wherein: In normal state, the air pressure sensor (5) does not contact with the hydraulic oil in the hydraulic oil tank (6).

4. The automatic hydraulic tank venting device of claim 1, wherein: A pressure relief valve (8) is included, the pressure relief valve (8) is electrically connected with the controller (1) through a wire, and the pressure relief valve (8) is connected with the hydraulic oil tank (6) through a pipeline.

5. The automatic hydraulic tank venting device according to claim 4, wherein: The controller (1) is electrically connected with a normally closed electromagnetic valve (9) through a wire, and the normally closed electromagnetic valve (9) is connected with the hydraulic oil tank (6) through a pipeline.

6. The automatic hydraulic tank venting device of claim 1, wherein: The controller (1) is electrically connected with an alarm (4) through a wire, and the alarm (4) includes an alarm lamp and a buzzer.

7. The automatic hydraulic tank venting device according to claim 6, characterized in that: The alarm lamp and the buzzer are respectively electrically connected with the controller (1) through wires.

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