Hydraulic leveling power system

Abstract

The utility model relates to the technical field of hydraulic leveling, in particular to a hydraulic leveling power system, which comprises a main oil supply circuit, a main oil return circuit, an electromagnetic proportional directional valve and an oil supply branch, the main oil supply circuit and the main oil return circuit are respectively connected with a port P and a port T of the electromagnetic proportional directional valve, and a port A and a port B of the electromagnetic proportional directional valve are used for connecting a working hydraulic cylinder. The first end of the oil supply branch is connected with the main oil supply line, and a quick-change connector is fixedly installed at the second end of the oil supply branch and connected with an oil supply connector of the manual emergency device. According to the hydraulic system, flow output controllability is achieved through the electromagnetic proportional directional valve, so that the action of the working hydraulic cylinder is accurately controlled, the levelness of the platform is accurately controlled, and compared with a traditional hydraulic system, an oil supply branch and a quick-change connector are additionally arranged on the oil outlet and can be connected with a manual emergency device. And an emergency effect is achieved when the equipment control circuit is abnormal.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic leveling, in particular to a hydraulic leveling power system. Background Art

[0002] With the development of my country's national economy, the demand for special vehicles continues to increase. Special vehicles include military vehicles, fire trucks, rescue vehicles, construction vehicles, etc. Such vehicles generally include hydraulic systems, and the main hydraulic systems include four aspects: leveling system, jacking system, rotation system, and synchronization system.

[0003] The manual switch type automatic control system is currently widely used in China. This leveling system often has a reaction error in the process of controlling the lifting of the left and right cylinders, resulting in poor adjustment performance of the manual leveling system, long leveling time, low leveling accuracy, poor reliability and other problems.

[0004] To this end, the utility model provides a novel hydraulic leveling power system. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a hydraulic leveling power system.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] Hydraulic leveling power system, used to drive the working hydraulic cylinder, used to drive the manual emergency device, including:

[0008] A main oil supply circuit, a main oil return circuit, and an electromagnetic proportional reversing valve. The main oil supply circuit and the main oil return circuit are respectively connected to the P and T interfaces of the electromagnetic proportional reversing valve. The A and B interfaces of the electromagnetic proportional reversing valve are used to connect to the working hydraulic cylinder.

[0009] An oil supply branch, wherein a first end of the oil supply branch is connected to the main oil supply circuit, and a quick-change joint is fixedly installed on the second end of the oil supply branch, and the quick-change joint is connected to the oil supply interface of the manual emergency device.

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

[0011] It also includes: an oil tank, the main oil supply circuit and the main oil return circuit both have one end located inside the oil tank, and the main oil supply circuit is sequentially installed with a pump body, a one-way valve, and a second filter.

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

[0013] The pump body comprises a gear pump and a DC motor, and the output end of the DC motor drives the gear pump to work.

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

[0015] It also includes an overflow circuit, one end of which is connected to the main oil supply line and is located between the pump body and the one-way valve, and an overflow valve is installed on the overflow circuit.

[0016] As a further description of the above technical solution:

[0017] It also includes: a circulation loop, one end of which is connected to the main oil supply line and is located between the second filter screen and the P interface of the electromagnetic proportional reversing valve, and an electromagnetic ball valve is installed on the circulation loop.

[0018] As a further description of the above technical solution:

[0019] It also includes: a pressure measuring branch, a first end of which is connected to the main oil supply line and is located between the second filter and the P interface of the electromagnetic proportional reversing valve, and a second end of the pressure measuring branch is connected to a pressure measuring joint.

[0020] As a further description of the above technical solution:

[0021] An oil suction filter is installed at the oil inlet of the main oil supply circuit.

[0022] The utility model has the following beneficial effects:

[0023] 1. Compared with the existing technology, the hydraulic leveling power system achieves flow output controllability by adopting an electromagnetic proportional reversing valve, thereby accurately controlling the action of the working hydraulic cylinder and realizing accurate control of the platform level. Compared with the traditional hydraulic system, the oil outlet is equipped with an oil supply branch and a quick-change connector, which can be interconnected with the manual emergency device to achieve emergency response when the equipment control circuit is abnormal. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the hydraulic leveling power system proposed by the utility model.

[0025] Legend:

[0026] 1. Oil tank; 2. Oil suction filter; 3. Gear pump; 4. DC motor; 5. Overflow valve; 6. Check valve; 7. Solenoid proportional reversing valve; 8. Pressure measuring joint; 9. Solenoid ball valve; 10. Second filter; 11. Quick-change joint. DETAILED DESCRIPTION

[0027] Reference Figure 1The hydraulic leveling power system provided by the utility model is used to drive the working hydraulic cylinder and the manual emergency device to ensure accurate control of the platform levelness, and can achieve emergency response when the equipment control circuit is abnormal. It includes: a main oil supply circuit, a main oil return circuit, an electromagnetic proportional reversing valve 7 and an oil supply branch circuit.

[0028] The main oil supply circuit and the main oil return circuit are respectively connected to the P and T interfaces of the electromagnetic proportional reversing valve 7, and the A and B interfaces of the electromagnetic proportional reversing valve 7 are used to connect the working hydraulic cylinder.

[0029] The electromagnetic proportional reversing valve 7 is continuous in both the left and right positions, achieving precise control of the cross-section of the oil outlet (A interface or B interface). Under the condition of constant oil supply pressure, it can precisely control the oil intake amount, thereby precisely controlling the action of the working hydraulic cylinder to ensure precise control of the platform levelness.

[0030] The first end of the oil supply branch is connected to the main oil supply circuit and communicates with the main oil supply circuit, and both can provide oil with constant pressure. The second end of the oil supply branch is fixedly installed with a quick-change connector 11, and the quick-change connector 11 is connected to the oil supply interface of the manual emergency device to supply oil to the manual emergency device. In an emergency state, the valve body (switch) on the manual emergency device is manually operated, and the manual emergency device is emergency braked.

[0031] In one embodiment, a 1.5L oil tank 1 is provided, and one end of the main oil supply line and the main oil return line are both located inside the oil tank 1. A pump body, a one-way valve 6, and a second filter 10 are installed in sequence on the main oil supply line.

[0032] The pump body works to transport the oil in the oil tank through the one-way valve 6 and the second filter 10 to the P interface of the electromagnetic proportional reversing valve 7.

[0033] Specifically, the pump body includes a gear pump 3 and a DC motor 4. The output end of the DC motor 4 drives the gear pump 3 to work. The DC motor 4, as a power source, can work efficiently and stably for a long time.

[0034] In one embodiment, it also includes: an overflow circuit, one end of which is connected to the main oil supply line and is located between the pump body and the one-way valve 6. An overflow valve 5 is installed on the overflow circuit. When the oil pressure in the main oil supply line is high, part of the oil passes through the overflow circuit, flows through the overflow valve 5, and flows back to the oil tank 1, thereby maintaining the stability of the oil pressure in the main oil supply line.

[0035] In one embodiment, it further includes: a circulation loop, one end of which is connected to the main oil supply line and is located between the second filter 10 and the P interface of the electromagnetic proportional reversing valve 7, and an electromagnetic ball valve 9 is installed on the circulation loop.

[0036] When the electromagnetic proportional reversing valve 7 is in the middle position, the electromagnetic ball valve 9 is opened, and the oil flows back to the oil tank 1 through the circulation loop, so that the oil at the quick-change joint 11 can flow back to the oil tank 1.

[0037] The ends of the circulation loop and the overflow loop not described above are connected to the oil tank 1 so that the oil flows back to the oil tank 1 for recycling.

[0038] In one embodiment, it also includes: a pressure measuring branch, the first end of the pressure measuring branch is connected to the main oil supply line and is located between the second filter 10 and the P interface of the electromagnetic proportional reversing valve 7, and the second end of the pressure measuring branch is connected to a pressure measuring connector 8, which can be a pressure gauge, a pressure sensor, etc., for monitoring the oil pressure in the main oil supply line.

[0039] In one embodiment, an oil suction filter 2 is installed at the oil inlet of the main oil supply circuit to filter impurities in the oil, thereby effectively protecting the service life of sensitive hydraulic components and reducing the system failure rate.

[0040] 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. Hydraulic leveling power system, used to drive the working hydraulic cylinder, used to drive the manual emergency device, characterized in that: include: A main oil supply circuit, a main oil return circuit, and an electromagnetic proportional reversing valve (7), wherein the main oil supply circuit and the main oil return circuit are respectively connected to the P and T interfaces of the electromagnetic proportional reversing valve (7), and the A and B interfaces of the electromagnetic proportional reversing valve (7) are used to connect to a working hydraulic cylinder; An oil supply branch circuit, wherein a first end of the oil supply branch circuit is connected to a main oil supply circuit, and a quick-change connector (11) is fixedly mounted on a second end of the oil supply branch circuit, wherein the quick-change connector (11) is connected to an oil supply interface of a manual emergency device.

2. The hydraulic leveling power system according to claim 1, characterized in that: Also includes: An oil tank (1), wherein the main oil supply circuit and the main oil return circuit both have one end located inside the oil tank (1), and a pump body, a one-way valve (6), and a second filter (10) are sequentially installed on the main oil supply circuit.

3. The hydraulic leveling power system according to claim 2, characterized in that: The pump body comprises a gear pump (3) and a DC motor (4), and the output end of the DC motor (4) drives the gear pump (3) to operate.

4. The hydraulic leveling power system according to claim 2, characterized in that: Also includes: An overflow circuit, one end of which is connected to the main oil supply line and is located between the pump body and the one-way valve (6), and an overflow valve (5) is installed on the overflow circuit.

5. The hydraulic leveling power system according to claim 2, characterized in that: Also includes: A circulation loop, one end of which is connected to the main oil supply line and is located between the second filter screen (10) and the P interface of the electromagnetic proportional reversing valve (7), and an electromagnetic ball valve (9) is installed on the circulation loop.

6. The hydraulic leveling power system according to claim 2, characterized in that: Also includes: A pressure measuring branch, wherein the first end of the pressure measuring branch is connected to the main oil supply line and is located between the second filter (10) and the P interface of the electromagnetic proportional reversing valve (7), and the second end of the pressure measuring branch is connected to a pressure measuring connector (8).

7. The hydraulic leveling power system according to claim 1, characterized in that: An oil suction filter (2) is installed at the oil inlet of the main oil supply circuit.

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