Emergency hydraulic control system for mining injection vehicle

Abstract

The utility model provides an emergency hydraulic control system for a mining injection vehicle, which comprises a motor control module, an engine control module and a hydraulic oil tank, the motor control module comprises a first pumping motor working oil way, a second pumping motor working oil way and a third pumping motor working oil way; the engine control module comprises a first pumping engine working oil way and a second pumping engine working oil way. The first pumping motor working oil way is connected with the second pumping motor working oil way in series through a normally-closed electromagnetic valve, the second pumping motor working oil way is connected with the third pumping motor working oil way in series through a normally-closed emergency electromagnetic valve, and the first pumping motor working oil way is connected with the third pumping motor working oil way in series through a normally-open electromagnetic valve. The first pumping engine working oil way is connected with the first pumping motor working oil way in series, and the second pumping engine working oil way is connected with the third pumping motor working oil way in series.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control technology, specifically to an emergency hydraulic control system for a mining jet truck. Background Technology

[0002] Currently, the hydraulic control system of a mining jet truck is generally divided into two parts: one part is motor control, which controls the pump boom's swing cylinder stirring action; the other part is engine power control, which controls the travel, braking, and steering. These two parts usually operate independently. However, in certain special circumstances, such as when the motor fails to operate, the hydraulic control system of the jet truck needs to take some emergency measures. Therefore, this patent proposes an emergency hydraulic control system for a mining jet truck to address such special circumstances. Utility Model Content

[0003] The purpose of this utility model is to provide an emergency hydraulic control system for a mining jetting vehicle. It mainly utilizes normally closed solenoid valves, normally closed emergency solenoid valves, and normally open solenoid valves to connect the oil circuit in series, so as to achieve reasonable distribution and control of hydraulic oil, enabling the system to perform emergency operations when the motor cannot run.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0005] An emergency hydraulic control system for a mining jetting vehicle includes: a motor control module and an engine control module. The motor control module includes a first pumping motor working oil circuit, a second pumping motor working oil circuit, and a third pumping motor working oil circuit. The engine control module includes a first pumping engine working oil circuit and a second pumping engine working oil circuit.

[0006] The first pumping motor working oil circuit is connected in series with the second pumping motor working oil circuit through a normally closed solenoid valve; the second pumping motor working oil circuit is connected in series with the third pumping motor working oil circuit through a normally closed emergency solenoid valve; and the first pumping motor working oil circuit is connected in series with the third pumping motor working oil circuit through a normally open solenoid valve.

[0007] The first pumping engine working oil circuit is connected in series with the first pumping motor working oil circuit, and the second pumping engine working oil circuit is connected in series with the third pumping motor working oil circuit.

[0008] Furthermore, a first check valve is provided between the first pumping engine working oil circuit and the first pumping motor working oil circuit, with the side of the first check valve near the first pumping engine working oil circuit serving as the valve sealing surface; a second check valve is provided between the second pumping engine working oil circuit and the third pumping motor working oil circuit, with the side of the second check valve near the second pumping engine working oil circuit serving as the valve sealing surface. The purpose is to prevent oil from flowing back from the motor working oil circuit to the engine working oil circuit by adjusting the direction of the first and second check valves.

[0009] Furthermore, a boom pump and a boom multi-way valve are sequentially connected in the working oil circuit of the first pumping motor. The normally closed solenoid valve is connected between the boom pump and the boom multi-way valve. The first check valve is connected between the boom multi-way valve and the working oil circuit of the first pumping motor, so that hydraulic oil can flow into the boom multi-way valve and the normally closed solenoid valve through the first check valve. When the normally closed solenoid valve is not energized, the boom multi-way valve operates to control the boom movement.

[0010] Furthermore, the second pumping motor working oil circuit is equipped with a cylinder closed circuit and a swing cylinder closed circuit. The first pumping motor working oil circuit is connected to the cylinder closed circuit through a normally closed solenoid valve, and the second pumping motor working oil circuit is connected to the swing cylinder closed circuit through a normally closed emergency solenoid valve, so that hydraulic oil can flow into the cylinder closed circuit and the swing cylinder closed circuit through the normally closed solenoid valve.

[0011] Furthermore, the cylinder closed circuit is provided with a main pump, a main valve, and a first cylinder connected in sequence. The main pump is connected to one side of the main valve, and one side of the main valve is connected to a normally closed solenoid valve. This not only allows the main pump to drive the first cylinder through the main valve, but also allows the hydraulic oil to drive the first cylinder in sequence through the normally closed solenoid valve and the main valve.

[0012] Furthermore, the swing cylinder closed circuit is provided with a swing cylinder pump, a main valve, and a swing cylinder connected in sequence. The swing cylinder pump is connected to the other side of the main valve, and the other side of the main valve is connected to a normally closed emergency solenoid valve. This not only allows the swing cylinder pump to drive the swing cylinder through the main valve, but also allows the hydraulic oil to drive the swing cylinder through the normally closed solenoid valve and the main valve in sequence.

[0013] Furthermore, the working oil circuit of the third pumping motor is equipped with a distribution pump and two manual valves connected in sequence, and the normally closed emergency solenoid valve is connected between the distribution pump and the two manual valves. The normally open solenoid valve is connected between the two manual valves and the boom multi-way valve. The second check valve is connected between the distribution pump and the two manual valves. The purpose is to allow the hydraulic oil to flow into the oil tank through the second check valve, the two manual valves, and the normally open solenoid valve to form a closed loop.

[0014] Furthermore, the first pumping engine working oil circuit is provided with a first high-pressure filter, a priority valve, a single-port multi-way valve, and a second oil cylinder connected in sequence, and the priority valve is connected to a first check valve, so that hydraulic oil passes through the first high-pressure filter, the priority valve, and the single-port multi-way valve in sequence to drive the second oil cylinder, and excess hydraulic oil can flow through the first high-pressure filter and the priority valve in sequence to the first check valve.

[0015] Furthermore, the second pumping engine working oil circuit is provided with a second high-pressure filter, a filling valve, a pedal valve, and an axle connected in sequence, and the filling valve is connected to a second check valve, so that hydraulic oil passes through the second high-pressure filter, the filling valve, and the pedal valve in sequence to drive the axle, and excess hydraulic oil can flow through the second high-pressure filter and the filling valve in sequence to the second check valve.

[0016] The beneficial effects of this utility model are:

[0017] This utility model provides an emergency hydraulic control system for a mining jetting vehicle. Compared with the prior art that uses manual control for emergency operation, this system uses normally closed solenoid valves, normally closed emergency solenoid valves, and normally open solenoid valves connected in series in the oil circuit. Relying on the properties of normally closed solenoid valves, normally closed emergency solenoid valves, and normally open solenoid valves, the hydraulic oil can be reasonably distributed and controlled. This allows the system to meet the needs of emergency operation when the motor cannot run, and reduces manual operation and avoids errors. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the series connection of oil circuits in an emergency hydraulic control system for a mining jet truck according to Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of a module of an emergency hydraulic control system for a mining jetting vehicle in Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of the pipeline of an emergency hydraulic control system for a mining jet truck in Embodiment 1 of this utility model;

[0021] Explanation of reference numerals in the attached diagram: 1-Motor, 2-Boom pump, 3-Main pump, 4-Swing cylinder pump, 5-Distributor pump, 6-Normally closed solenoid valve, 7-Main valve, 8-Normally closed emergency solenoid valve, 9-Dual manual valve, 10-Normally open solenoid valve, 11-Boom multi-way valve, 12-Second check valve, 13-Filling valve, 14-Pedal valve, 15-Second high-pressure filter, 16-Double gear pump, 17-First high-pressure filter, 18-Priority valve, 19-Single multi-way valve, 20-Four-way valve, 21-First check valve, 22-First cylinder, 23-Swing cylinder, 24-Axle, 25-Second cylinder. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the embodiments of this utility model are not limited thereto.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0026] Example 1

[0027] Currently, the hydraulic control system of mining jet trucks is generally divided into two parts: one part is controlled by motor 1, which controls the pumping boom's swing cylinder agitation action; the other part is controlled by the engine power, which controls travel, braking, and steering. These two parts usually operate independently. However, in some situations, emergency control using the engine to control the pumping boom agitation is required, such as when motor 1 fails to operate. Existing technology often uses manual control for emergency operations, which is prone to errors.

[0028] Therefore, to avoid this problem, this embodiment provides an emergency hydraulic control system for a mining jet truck, such as... Figure 1 As shown, it includes: a motor control module, an engine control module, and a hydraulic oil tank for supplying hydraulic oil to the motor control module and the engine control module. The motor control module includes a first pumping motor working oil circuit, a second pumping motor working oil circuit, and a third pumping motor working oil circuit. The engine control module includes a first pumping engine working oil circuit and a second pumping engine working oil circuit.

[0029] The first pump motor working oil circuit is connected in series with the second pump motor working oil circuit through a normally closed solenoid valve 6. The second pump motor working oil circuit is connected in series with the third pump motor working oil circuit through a normally closed emergency solenoid valve 8. The first pump motor working oil circuit is connected in series with the third pump motor working oil circuit through a normally open solenoid valve 10.

[0030] The first pumping engine working oil circuit is connected in series with the first pumping motor working oil circuit, and the second pumping engine working oil circuit is connected in series with the third pumping motor working oil circuit.

[0031] A first check valve 21 is provided between the first pumping engine working oil circuit and the first pumping motor working oil circuit, and the side of the first check valve 21 closest to the first pumping engine working oil circuit is the valve sealing surface.

[0032] A second check valve 12 is provided between the second pumping engine working oil circuit and the third pumping motor working oil circuit. The side of the second check valve 12 closest to the second pumping engine working oil circuit is the valve sealing surface.

[0033] In this system, the pump boom swing cylinder stirring action is realized through the motor control module, and the travel braking and steering are realized through the engine control module. The first pump motor working oil circuit, the second pump motor working oil circuit, and the third pump motor working oil circuit are all driven and controlled by motor 1, while the first pump engine working oil circuit and the second pump engine working oil circuit are both controlled by double gear pump 16.

[0034] Based on the above principles, it can be seen that in this system, the working oil circuits of the first pumping motor, the second pumping motor, and the third pumping motor controlled by the motor 1 are connected in series with the working oil circuits of the first pumping engine and the second pumping engine controlled by the double gear pump 16 through the normally closed solenoid valve 6, the normally closed emergency solenoid valve 8, and the normally open solenoid valve 10, forming a closed loop. When the motor 1 cannot operate, emergency operation can be achieved through the basic properties of the normally closed solenoid valve 6, the normally closed emergency solenoid valve 8, and the normally open solenoid valve 10, which facilitates operation and reduces unnecessary actions to avoid omissions or errors in operation.

[0035] Furthermore, a check valve is provided between the motor working oil circuit and the engine working oil circuit, including a first check valve 21 and a second check valve 12. The direction of the check valve can prevent oil in the motor working oil circuit from flowing back into the engine working oil circuit.

[0036] Specifically, such as Figure 2As shown, a boom pump 2 and a boom multi-way valve 11 are sequentially connected in the working oil circuit of the first pumping motor. The normally closed solenoid valve 6 is connected between the boom pump 2 and the boom multi-way valve 11, and the first one-way valve 21 is connected between the boom multi-way valve 11 and the working oil circuit of the first pumping motor.

[0037] The second pumping motor working oil circuit is equipped with a cylinder closure circuit and a swing cylinder closure circuit. The first pumping motor working oil circuit is connected to the cylinder closure circuit through a normally closed solenoid valve 6, and the second pumping motor working oil circuit is connected to the swing cylinder closure circuit through a normally closed emergency solenoid valve 8.

[0038] The closed circuit of the hydraulic cylinder is provided with a main pump 3, a main valve 7, and a first hydraulic cylinder 22 connected in sequence. The main pump 3 is connected to one side of the main valve 7, and one side of the main valve 7 is connected to a normally closed solenoid valve 6.

[0039] The swing cylinder closed circuit is provided with a swing cylinder pump 4, a main valve 7, and a swing cylinder 23 connected in sequence. The swing cylinder pump 4 is connected to the other side of the main valve 7, and the other side of the main valve 7 is connected to a normally closed emergency solenoid valve 8.

[0040] The working oil circuit of the third pumping motor is provided with a distribution pump 5 and a two-way manual valve 9 connected in sequence, and the normally closed emergency solenoid valve 8 is connected between the distribution pump 5 and the two-way manual valve 9. The normally open solenoid valve 10 is connected between the two-way manual valve 9 and the boom multi-way valve 11. The second one-way valve 12 is connected between the distribution pump 5 and the two-way manual valve 9.

[0041] The first pumping engine's working oil circuit is equipped with a first high-pressure filter 17, a priority valve 18, a single-port multi-way valve 19, and a second oil cylinder 25 connected in sequence, and the priority valve 18 is connected to a first check valve 21. Specifically, the priority valve 18 is connected to the first check valve 21 through a four-way valve 20, and the other end of the four-way valve 20 is also connected to a normally open solenoid valve 10.

[0042] The second pumping engine working oil circuit is provided with a second high-pressure filter 15, a filling valve 13, a pedal valve 14, and a vehicle axle 24 connected in sequence, and the filling valve 13 is connected to the second one-way valve 12.

[0043] Based on the above principles, Figure 3 As can be seen from this, the working process of this system is as follows:

[0044] When motor 1 is in control: motor 1 will act as a power source to control the boom pump 2, main pump 3, swing cylinder pump 4, and distribution pump 5 in series. The boom pump 2 outputs oil into the boom multi-way valve 11 to control the boom movement and form a boom control loop; the main pump 3 outputs oil into the left side of the main valve 7 to control the pumping of the first cylinder 22 to form a pumping loop; the swing cylinder pump 4 outputs oil into the right side of the main valve 7 to control the swing cylinder 23 to form a swing cylinder closed loop; the distribution pump 5 outputs oil into the two-way manual valve 9 to connect the pumping, cleaning, and stirring motors to form a closed loop.

[0045] When the engine is under power control: the engine rotation will drive the double gear pump 16 to rotate, outputting two parts of hydraulic oil. The hydraulic oil output from one end of the double gear pump 16 passes through the first high-pressure filter 17 and is supplied to the filling valve 13, flowing into the pedal valve 14 to control the axle 24 for service braking control. The excess oil flows into the oil tank through the second one-way valve 12, the double manual valve 9, and the normally open solenoid valve 10 to form a closed loop. The hydraulic oil output from the other end of the double gear pump 16 passes through the first high-pressure filter 17 and flows into the priority valve 18 and the single multi-way valve 19 to control the steering second cylinder 25. The excess oil flows into the four-way valve and then into the oil tank to form a closed loop.

[0046] When motor 1 fails to operate: the engine rotation will drive the double gear pump 16 to rotate, thereby outputting two parts of hydraulic oil. The hydraulic oil output by the double gear pump 16 passes through the second high pressure filter 15, the filling valve 13, and the second check valve 12 in sequence and flows into the normally closed emergency solenoid valve 8. At the same time, the normally open solenoid valve 10 is energized and closed, and the normally closed emergency solenoid valve 8 is energized and opened. Then the hydraulic oil will flow through the normally closed emergency solenoid valve 8 into the right side of the main valve 7 and the swing cylinder 23 to form a swing cylinder closed circuit.

[0047] The hydraulic oil output from the dual gear pump 16 flows sequentially through the first high-pressure filter 17 and the priority valve 18 into the four-way valve 20. The four-way valve 20 is a four-way manual valve. When the four-way valve 20 is manually moved to the corresponding position, the hydraulic oil will flow through the first check valve 21 into the boom multi-way valve 11 and the normally closed solenoid valve 6. When the normally closed solenoid valve 6 is not energized, the boom multi-way valve 11 operates to control the boom movement. When the normally closed solenoid valve 6 is energized, the hydraulic oil will flow into the left side of the main valve 7 and enter the first cylinder 22 to form a pumping control circuit.

[0048] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. An emergency hydraulic control system for a mining jetting vehicle, characterized in that, include: The motor control module includes a first pumping motor working oil circuit, a second pumping motor working oil circuit, and a third pumping motor working oil circuit; the engine control module includes a first pumping engine working oil circuit and a second pumping engine working oil circuit. The first pump motor working oil circuit is connected in series with the second pump motor working oil circuit through a normally closed solenoid valve (6), the second pump motor working oil circuit is connected in series with the third pump motor working oil circuit through a normally closed emergency solenoid valve (8), and the first pump motor working oil circuit is connected in series with the third pump motor working oil circuit through a normally open solenoid valve (10). The first pumping engine working oil circuit is connected in series with the first pumping motor working oil circuit, and the second pumping engine working oil circuit is connected in series with the third pumping motor working oil circuit.

2. The emergency hydraulic control system for a mining jetting vehicle according to claim 1, characterized in that, A first check valve (21) is provided between the first pumping engine working oil circuit and the first pumping motor working oil circuit. The side of the first check valve (21) closest to the first pumping engine working oil circuit is the valve sealing surface. A second check valve (12) is provided between the second pumping engine working oil circuit and the third pumping motor working oil circuit. The side of the second check valve (12) closest to the second pumping engine working oil circuit is the valve sealing surface.

3. The emergency hydraulic control system for a mining jetting vehicle according to claim 2, characterized in that, The first pump motor working oil circuit is provided with a boom pump (2) and a boom multi-way valve (11) connected in sequence. The normally closed solenoid valve (6) is connected between the boom pump (2) and the boom multi-way valve (11). The first check valve (21) is connected between the boom multi-way valve (11) and the first pump motor working oil circuit.

4. The emergency hydraulic control system for a mining jetting vehicle according to claim 2, characterized in that, The second pumping motor working oil circuit is equipped with a cylinder closure circuit and a swing cylinder closure circuit. The first pumping motor working oil circuit is connected to the cylinder closure circuit through a normally closed solenoid valve (6), and the second pumping motor working oil circuit is connected to the swing cylinder closure circuit through a normally closed emergency solenoid valve (8).

5. The emergency hydraulic control system for a mining jetting vehicle according to claim 4, characterized in that, The closed circuit of the hydraulic cylinder is provided with a main pump (3), a main valve (7) and a first hydraulic cylinder (22) connected in sequence. The main pump (3) is connected to one side of the main valve (7), and one side of the main valve (7) is connected to a normally closed solenoid valve (6).

6. The emergency hydraulic control system for a mining jet truck according to claim 5, characterized in that, The swing cylinder closed circuit is provided with a swing cylinder pump (4), a main valve (7), and a swing cylinder (23) connected in sequence. The swing cylinder pump (4) is connected to the other side of the main valve (7), and the other side of the main valve (7) is connected to a normally closed emergency solenoid valve (8).

7. The emergency hydraulic control system for a mining jet truck according to claim 3, characterized in that, The working oil circuit of the third pumping motor is provided with a distribution pump (5) and a two-way manual valve (9) connected in sequence. The normally closed emergency solenoid valve (8) is connected between the distribution pump (5) and the two-way manual valve (9). The normally open solenoid valve (10) is connected between the two-way manual valve (9) and the boom multi-way valve (11). The second one-way valve (12) is connected between the distribution pump (5) and the two-way manual valve (9).

8. The emergency hydraulic control system for a mining jetting vehicle according to claim 2, characterized in that, The first pumping engine working oil circuit is provided with a first high-pressure filter (17), a priority valve (18), a single-port multi-way valve (19), and a second oil cylinder (25) connected in sequence, and the priority valve (18) is connected to the first one-way valve (21).

9. The emergency hydraulic control system for a mining jetting vehicle according to claim 2, characterized in that, The second pumping engine working oil circuit is provided with a second high-pressure filter (15), a filling valve (13), a pedal valve (14), and an axle (24) connected in sequence, and the filling valve (13) is connected to the second one-way valve (12).

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