Protection device for low-pressure hydraulic system of milling excavator

Abstract

The utility model relates to the field of protection devices, and discloses a protection device for a low-pressure hydraulic system of a milling excavator, which comprises a milling excavator body, a low-pressure hydraulic tank is fixedly connected in the milling excavator body, a water inlet is arranged in the middle of the low-pressure hydraulic tank, and a hydraulic oil source is arranged on the rear side of the upper portion of the low-pressure hydraulic tank. An oil conveying pipe is fixedly connected to the lower portion of the hydraulic oil source, a buffer is fixedly connected to the bottom in the low-pressure hydraulic tank, a pressure detection assembly is arranged on the rear side of the buffer, and a temperature control assembly is arranged in the low-pressure hydraulic tank. According to the protection device, the buffer, the oil guide pipe, the pressure sensor, the alarm, the temperature sensor, the refrigerator and other structures are matched, so that the protection device can protect the low-pressure hydraulic system for the milling excavator, and the influence of high pressure or high temperature on the low-pressure hydraulic system is prevented.

Description

Technical Field

[0001] The utility model relates to the field of protection devices, in particular to a protection device for a low-pressure hydraulic system of a milling excavator. Background Art

[0002] A milling machine is a heavy mechanical equipment used for milling and excavating on roads or other surfaces. A milling machine usually uses a hydraulic system to provide power and control operations, including controlling milling, excavating, moving and other functions. In order to ensure the safe, stable and reliable operation of the hydraulic system and prevent system failure and damage, a protective device for the low-pressure hydraulic system of the milling machine is required.

[0003] In the prior art, the protection device for the low-pressure hydraulic system of the milling machine often has a single protection form and cannot simultaneously provide high-pressure and high-temperature protection for the low-pressure hydraulic system. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a protection device for the low-pressure hydraulic system of a milling machine, aiming to improve the problem that the protection form in the prior art is single and cannot simultaneously provide high-pressure and high-temperature protection for the low-pressure hydraulic system.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a protective device for the low-pressure hydraulic system of a milling machine, comprising a milling machine body, a low-pressure hydraulic tank is fixedly connected to the inside of the milling machine body, a water inlet is opened in the upper middle part of the low-pressure hydraulic tank, a hydraulic oil source is opened on the upper rear side of the low-pressure hydraulic tank, an oil pipeline is fixedly connected to the lower part of the hydraulic oil source, a buffer is fixedly connected to the bottom of the low-pressure hydraulic tank, a pressure detection component is arranged on the rear side of the buffer, and a temperature control component is arranged inside the low-pressure hydraulic tank.

[0006] As a further description of the above technical solution:

[0007] The pressure detection assembly includes an oil guide pipe, a pressure sensor and an alarm. The oil guide pipe is fixedly connected to the rear side of the bottom of the low-pressure hydraulic tank, the pressure sensor is fixedly connected to the outside of the oil guide pipe, and the alarm is fixedly connected to the rear side of the upper part of the low-pressure hydraulic tank.

[0008] As a further description of the above technical solution:

[0009] The temperature control component comprises a temperature sensor and a refrigerator. The temperature sensor is fixedly connected to the front side of the inner wall of the low-pressure hydraulic tank, and the refrigerator is fixedly connected to the rear side of the upper middle part of the low-pressure hydraulic tank.

[0010] As a further description of the above technical solution:

[0011] The lower part of the milling machine body is fixedly connected with a driving mechanism.

[0012] As a further description of the above technical solution:

[0013] One end of the oil guide pipe away from the low-pressure hydraulic tank is fixedly connected to the buffer, and the pressure sensor is electrically connected to the alarm.

[0014] As a further description of the above technical solution:

[0015] The temperature sensor is electrically connected to the refrigerator, and the output end of the refrigerator passes through the rear side of the low-pressure hydraulic tank.

[0016] The utility model has the following beneficial effects:

[0017] In the utility model, through the cooperation between structures such as the buffer, the oil guide pipe, the pressure sensor, the alarm, the temperature sensor and the refrigerator, the protection device can perform high-pressure and high-temperature protection on the low-pressure hydraulic system used for the milling machine, thereby preventing the high pressure and high temperature from affecting the low-pressure hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A side view of a protective device for a low-pressure hydraulic system of a milling machine proposed by the utility model;

[0019] Figure 2 This is a front view of a protective device for a low-pressure hydraulic system of a milling machine proposed by the utility model;

[0020] Figure 3 The utility model is a schematic diagram of a slide rail of a protective device for a low-pressure hydraulic system of a milling machine.

[0021] Legend:

[0022] 1. Milling machine body; 2. Driving mechanism; 3. Low-pressure hydraulic tank; 4. Water inlet; 5. Hydraulic oil source; 6. Oil pipeline; 7. Buffer; 8. Pressure sensor; 9. Temperature sensor; 10. Refrigerator; 11. Alarm; 12. Oil guide pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0024] Reference Figure 1-3The utility model provides an embodiment: a protective device for a low-pressure hydraulic system of a milling machine, comprising a milling machine body 1, a low-pressure hydraulic tank 3 is fixedly connected inside the milling machine body 1, a water inlet 4 is opened in the upper middle part of the low-pressure hydraulic tank 3, a hydraulic oil source 5 is opened on the upper rear side of the low-pressure hydraulic tank 3, an oil pipeline 6 is fixedly connected to the lower part of the hydraulic oil source 5, a buffer 7 is fixedly connected to the bottom of the low-pressure hydraulic tank 3, a pressure detection component is arranged on the rear side of the buffer 7, a temperature control component is arranged inside the low-pressure hydraulic tank 3, the temperature control component comprises a temperature sensor 9 and a refrigerator 10, the temperature sensor 9 is fixedly connected to the front side of the inner wall of the low-pressure hydraulic tank 3, the refrigerator 10 is fixedly connected to the rear side of the upper middle part of the low-pressure hydraulic tank 3, a driving mechanism 2 is fixedly connected to the lower part of the milling machine body 1, the milling machine is driven to move by the driving mechanism 2, the temperature sensor 9 is electrically connected to the refrigerator 10, and the output end of the refrigerator 10 runs through the rear side of the low-pressure hydraulic tank 3.

[0025] When the low-pressure hydraulic system of the milling machine is working, a preset value is set for the temperature sensor 9, and cooling water is input into the low-pressure hydraulic tank 3 through the water inlet 4. The water temperature is detected by the temperature sensor 9. When the water temperature is higher than the preset value, the temperature sensor 9 controls the start-up of the refrigerator 10 so that the refrigerator 10 runs to cool the cooling water. After the hydraulic oil is input into the low-pressure hydraulic tank 3 through the hydraulic oil source 5, the hydraulic oil is cooled by the cooling water inside the low-pressure hydraulic tank 3. In this way, the protection device can protect the low-pressure hydraulic system used for the milling machine and prevent high temperature from affecting the low-pressure hydraulic system.

[0026] The pressure detection component includes an oil guide pipe 12, a pressure sensor 8 and an alarm 11. The oil guide pipe 12 is fixedly connected to the rear side of the bottom of the low-pressure hydraulic tank 3, the pressure sensor 8 is fixedly connected to the outside of the oil guide pipe 12, the alarm 11 is fixedly connected to the upper rear side of the low-pressure hydraulic tank 3, the end of the oil guide pipe 12 away from the low-pressure hydraulic tank 3 is fixedly connected to the buffer 7, and the pressure sensor 8 is electrically connected to the alarm 11.

[0027] After the hydraulic oil is input into the low-pressure hydraulic tank 3 through the hydraulic oil source 5, the hydraulic oil is transported through the oil pipe 6. After the hydraulic oil flows into the buffer 7, the pressure of the hydraulic oil is controlled by the buffer 7. The hydraulic oil enters the oil guide pipe 12 and the pressure is detected by the pressure sensor 8. When the pressure in the oil guide pipe 12 is too high, the pressure sensor 8 triggers the alarm 11 to alert the user, thereby realizing that the protection device can protect the low-pressure hydraulic system used for the milling machine to prevent the high pressure from affecting the low-pressure hydraulic system.

[0028] Working principle: When the low-pressure hydraulic system of the milling machine is working, preset values ​​are set for the pressure sensor 8 and the temperature sensor 9, and cooling water is input into the low-pressure hydraulic tank 3 through the water inlet 4. The water temperature is detected by the temperature sensor 9. When the water temperature is higher than the preset value, the temperature sensor 9 controls the start-up of the refrigerator 10 to make the refrigerator 10 run to cool the cooling water. After the hydraulic oil is input into the low-pressure hydraulic tank 3 through the hydraulic oil source 5, the hydraulic oil is transported through the oil pipe 6. After the hydraulic oil is cooled by the cooling water inside the low-pressure hydraulic tank 3, it flows into the buffer 7. After the pressure of the hydraulic oil is controlled by the buffer 7, the hydraulic oil enters the oil guide pipe 12 and the pressure is detected by the pressure sensor 8. When the pressure in the oil guide pipe 12 is too high, the pressure sensor 8 triggers the alarm 11 to alert the user, thereby realizing that the protection device can protect the low-pressure hydraulic system used for the milling machine to prevent high pressure or high temperature from affecting the low-pressure hydraulic system.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective device for a low-pressure hydraulic system of a milling machine, comprising a milling machine body (1), characterized in that: A low-pressure hydraulic tank (3) is fixedly connected to the interior of the milling machine body (1); a water inlet (4) is provided at the middle of the upper portion of the low-pressure hydraulic tank (3); a hydraulic oil source (5) is provided at the rear side of the upper portion of the low-pressure hydraulic tank (3); an oil pipeline (6) is fixedly connected to the lower portion of the hydraulic oil source (5); a buffer (7) is fixedly connected to the bottom of the low-pressure hydraulic tank (3); a pressure detection component is provided at the rear side of the buffer (7); and a temperature control component is provided inside the low-pressure hydraulic tank (3).

2. A protective device for a low-pressure hydraulic system of a milling machine according to claim 1, characterized in that: The pressure detection assembly comprises an oil guide pipe (12), a pressure sensor (8) and an alarm (11); the oil guide pipe (12) is fixedly connected to the rear side of the bottom of the low-pressure hydraulic tank (3); the pressure sensor (8) is fixedly connected to the outside of the oil guide pipe (12); and the alarm (11) is fixedly connected to the rear side of the upper part of the low-pressure hydraulic tank (3).

3. The protective device for a low-pressure hydraulic system of a milling machine according to claim 1, characterized in that: The temperature control component comprises a temperature sensor (9) and a refrigerator (10), wherein the temperature sensor (9) is fixedly connected to the front side of the inner wall of the low-pressure hydraulic tank (3), and the refrigerator (10) is fixedly connected to the rear side of the upper middle part of the low-pressure hydraulic tank (3).

4. The protective device for a low-pressure hydraulic system of a milling machine according to claim 1, characterized in that: The lower part of the milling machine body (1) is fixedly connected with a driving mechanism (2).

5. The protective device for the low-pressure hydraulic system of a milling machine according to claim 2, characterized in that: One end of the oil guide pipe (12) away from the low-pressure hydraulic tank (3) is fixedly connected to the buffer (7), and the pressure sensor (8) is electrically connected to the alarm (11).

6. The protective device for the low-pressure hydraulic system of a milling machine according to claim 3, characterized in that: The temperature sensor (9) is electrically connected to the refrigerator (10), and the output end of the refrigerator (10) passes through the rear side of the low-pressure hydraulic tank (3).

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