Mining pilot type motor control valve group

Abstract

The utility model discloses a mining pilot type motor control valve group which comprises a valve body, an electromagnetic pilot valve is arranged in the valve body, the electromagnetic pilot valve is respectively connected with a reversing valve core I and a reversing valve core II, the reversing valve core I is sequentially connected with a balance valve I and a hydraulic motor, and the reversing valve core I is further respectively connected with a balance valve II and a shuttle valve. The reversing valve core II is sequentially connected with a balance valve II and a hydraulic motor, and is also respectively connected with a balance valve I and a shuttle valve; the shuttle valve is connected with the hydraulic reversing valve. The hydraulic chain tightener control valve solves the problems that a handle of an existing hydraulic chain tightener control valve is inconvenient to operate, and the requirement for long-time work cannot be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground coal mine mechanical equipment and relates to a mining pilot motor control valve group. Background Art

[0002] In coal mining operations, the control of the chain tension of equipment such as scraper conveyors is crucial. The chain tensioning methods are roughly divided into the brake disc chain tensioning used for small-power scraper conveyors and the hydraulic chain tensioner used for large-power scraper conveyors. The hydraulic chain tensioner mainly consists of a gearbox, a hydraulic motor, and a control valve group. The control valve group in it generally directly controls the forward and reverse rotation of the motor through a direct-acting handle. However, the control valve group with a direct-acting handle has the following disadvantages: ① It requires a large force to move the handle, and it is not easy to move; ② It cannot perform position locking. When the hand leaves the handle, the motor stops rotating, which is not suitable for long-term work. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a mining pilot motor control valve group, which solves the problems of inconvenient handle operation and non-meeting the long-term work requirements existing in the control valve of the existing hydraulic chain tensioner.

[0004] The technical solution adopted by the utility model is that the mining pilot motor control valve group includes a valve body. An electromagnetic pilot valve is provided on the valve body. The electromagnetic pilot valve is respectively connected to a reversing spool I and a reversing spool II. The reversing spool I is sequentially connected to a balance valve I and a hydraulic motor. The reversing spool I is also respectively connected to a balance valve II and a shuttle valve. The reversing spool II is sequentially connected to the balance valve II and the hydraulic motor. The reversing spool II is also respectively connected to the balance valve I and the shuttle valve. The shuttle valve is connected to a hydraulic pilot-operated directional valve.

[0005] The characteristics of the utility model also lie in that:

[0006] The electromagnetic pilot valve is also connected to a pilot filter element.

[0007] The hydraulic pilot-operated directional valve is connected to a pressure gauge.

[0008] The reversing spool I and the reversing spool II are respectively connected to a pressure reducing valve.

[0009] A check valve is provided between the T port of the valve body and the electromagnetic pilot valve.

[0010] The beneficial effects of the utility model are as follows:

[0011] 1. An electromagnetic pilot valve is provided on the valve body of the utility model. The electromagnetic pilot valve is provided with an upper handle and a lower handle, which replaces the manual operation handle in the control valve of the existing hydraulic chain tensioner. The operation is simple, time-saving and labor-saving, and solves the problem of inconvenient manual operation.

[0012] 2. In the solenoid valve pilot valve used in the present utility model, both the upper handle and the lower handle have a self-locking function. Even if the handle is released, the hydraulic motor can continue to operate, meeting the requirements for long-term operation.

[0013] 3. This Yongxin solenoid pilot valve can be connected to a control cable and extended to remote electrical control or line-of-sight remote control for easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic three-dimensional structure diagram of the mine-used pilot-type motor control valve group of the present utility model;

[0015] Figure 2 It is a right view of the mine-used pilot-type motor control valve group of the present utility model;

[0016] Figure 3 It is a left view of the mine-used pilot-type motor control valve group of the present utility model;

[0017] Figure 4 It is a hydraulic schematic diagram of the mine-used pilot-type motor control valve group of the present utility model;

[0018] In the figure, 1. Valve body, 2. Balance valve I, 3. Balance valve II, 4. Pressure reducing valve, 5. Pressure gauge, 6. Solenoid pilot valve, 6-1. Upper handle, 6-2. Lower handle, 7. Directional control spool I, 8. Directional control spool II, 9. Hydraulic directional control valve, 10. Pilot filter element, 11. Check valve, 12. Shuttle valve, 13. Hydraulic motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will be described in detail below in conjunction with the drawings and specific embodiments.

[0020] Embodiment 1

[0021] The mine-used pilot-type motor control valve group of the present utility model, as Figure 1 shown, includes a valve body 1. An electromagnetic pilot valve 6, a directional control spool I 7, and a directional control spool II 8 are integrated on the valve body 1. An upper handle 6-1 and a lower handle 6-2 are provided on the electromagnetic pilot valve 6. The electromagnetic pilot valve 6 is respectively connected to the directional control spool I 7 and the directional control spool II 8. The directional control spool I 7 is sequentially connected to the balance valve I 2 and the hydraulic motor 13, and the directional control spool I 7 is also respectively connected to the balance valve II 3 and the shuttle valve 12; the directional control spool II 8 is sequentially connected to the balance valve II 3 and the hydraulic motor 13, and the directional control spool II 8 is also respectively connected to the balance valve I 2.

[0022] Embodiment 2

[0023] On the basis of Embodiment 1, as Figure 2 shown, the electromagnetic pilot valve 6 is also connected to the pilot filter element 10.

[0024] Example 3

[0025] Based on Example 2, as Figure 3 shown, a shuttle valve 12 is also integrated in the valve body 1. The shuttle valve 12 is respectively connected to the reversing spool I7 and the reversing spool II8, and the shuttle valve 12 is connected to the hydraulic reversing valve 9.

[0026] Example 4

[0027] Based on Example 3, a pressure gauge 5 is further connected to the hydraulic reversing valve 9.

[0028] Example 5

[0029] Based on Example 4, a liquid discharge port X, an inlet X and an outlet T are respectively provided on the valve body 1.

[0030] Example 6

[0031] Based on Example 5, a check valve 11 is provided between the outlet T of the valve body 1 and the electromagnetic pilot valve 6.

[0032] Example 7

[0033] Based on Example 6, both the reversing spool I7 and the reversing spool II8 are connected to a pressure reducing valve 4.

[0034] As Figure 4 shown, the working principle of the mine-used pilot-type motor control valve group of the present utility model is as follows: when the high-pressure working medium enters the valve body 1 from the P port, it will be divided into two parts: one part of the working medium enters the reversing spool I7 and the reversing spool II8 through the pressure reduction of the pressure reducing valve 4 as the working medium for the hydraulic motor 13 to work, and due to the pressure reduction, a part of the working medium will be discharged from the valve body 1 through the X port; the other part of the working medium enters the electromagnetic pilot valve 6 after being filtered by the pilot filter element 10 as the control medium for the hydraulic motor 13 to work.

[0035] When the hydraulic motor 13 needs to work clockwise, the lower handle 6-2 of the electromagnetic pilot valve 6 can be toggled to the horizontal position and locked, or the lower handle 6-2 of the electromagnetic pilot valve 6 can be controlled by an electrical signal through a control cable to open the lower handle 6-2 of the electromagnetic pilot valve 6, allowing the control medium to enter the reversing spool I 7 and open the reversing spool I 7. At this time, the working medium is divided into three parts after passing through the reversing spool I 7: The first part of the working medium enters the R port of the hydraulic motor 13 from port A after passing through the balance valve I 2, giving the hydraulic motor 13 a tendency to rotate clockwise; The second part of the working medium enters the control port of the balance valve II 3, opening the balance valve II 3 so that it will not obstruct the working medium after the work is completed; The third part of the working medium passes through the shuttle valve 12 and enters the hydraulic reversing valve 9 and the pressure gauge 5. The current working pressure is displayed by the pressure gauge 5, and this part of the medium will enter the K1 port of the hydraulic motor 13 after controlling the hydraulic reversing valve 9 to change direction, opening the braking device of the hydraulic motor 13 and losing the braking function. At this time, the hydraulic motor 13 starts to work clockwise, and the working medium after completing the work is discharged from port L and enters the valve body 1 from port B, then passes through the balance valve II 3 and the reversing spool II 8 in sequence, and is then discharged from the T port of the valve body 1.

[0036] When the hydraulic motor 13 needs to stop operating, toggle the lower handle 6-2 of the electromagnetic pilot valve 6 to the vertical position, or stop providing the electrical signal. At this time, the lower handle 6-2 of the electromagnetic pilot valve 6 returns to its original position, preventing the control medium from passing through the electromagnetic pilot valve and entering the reversing spool I 7, so that the reversing spool I 7 cannot be opened, and the subsequent hydraulic system cannot receive the liquid supply, causing the hydraulic motor 13 to stop rotating. Also, the hydraulic reversing valve 9 returns to its original position, and the working medium in the braking device of the hydraulic motor 13 is discharged from the X port of the valve body 1 after passing through the hydraulic reversing valve 9, closing the braking device and restoring the braking function.

[0037] When the hydraulic motor 13 needs to operate counterclockwise, the upper handle 6-1 of the electromagnetic pilot valve 6 can be toggled to the horizontal position and locked, or the upper handle 6-1 of the electromagnetic pilot valve 6 can be controlled by an electrical signal through a control cable, so that the upper handle 6-1 of the electromagnetic pilot valve 6 is opened, and the control medium enters the reversing spool II 8 and opens the reversing spool II 8. At this time, the working medium is divided into three parts after passing through the reversing spool II 8: The first part of the working medium enters the L port of the hydraulic motor 13 from the B port after passing through the balance valve II 3, making the hydraulic motor 13 tend to rotate counterclockwise; The second part of the working medium enters the control port of the balance valve I 2, opening the balance valve I 2 so that it will not hinder the working medium after the work is completed; The third part of the working medium enters the hydraulic reversing valve 9 and the pressure gauge 5 through the shuttle valve 12. The current working pressure is displayed by the pressure gauge 5, and this part of the medium will enter the K1 port of the hydraulic motor 13 from the K port after controlling the hydraulic reversing valve 9 to reverse, opening the braking device of the hydraulic motor 13 and losing the braking function. At this time, the hydraulic motor 13 starts to operate counterclockwise, and the working medium after completing the work will be discharged from the L port and enter the valve body 1 from the A port, then pass through the balance valve I 2 and the reversing spool I 7 in sequence, and then be discharged from the T port of the valve body 1. A check valve 11 is provided on the pipeline between the T port and the electromagnetic pilot valve 6.

[0038] When the hydraulic motor 13 needs to stop operating, the upper handle of the electromagnetic pilot valve 6 is toggled to the vertical position, or the electrical signal supply is stopped. At this time, the upper handle 6-1 of the electromagnetic pilot valve 6 returns to its original position, so that the control medium cannot enter the reversing spool II 8 through the electromagnetic pilot valve, the reversing spool II 8 cannot be opened, and the subsequent hydraulic system cannot be supplied with liquid, so that the hydraulic motor 13 stops rotating, and the hydraulic reversing valve 9 returns to its original position. The working medium in the braking device of the hydraulic motor 13 will be discharged from the X port of the valve body 1 after passing through the hydraulic reversing valve 9, and the braking device is closed, restoring the braking function.

[0039] The characteristics of the mine-used pilot-type motor control valve group of the present utility model are as follows: By integrating the electromagnetic pilot valve 6 on the valve body 1, according to the clockwise or counterclockwise rotation conditions of the hydraulic motor 13, the upper handle 6-1 and the lower handle 6-2 of the electromagnetic pilot valve 6 are correspondingly operated; The upper handle 6-1 and the lower handle 6-2 on the electromagnetic pilot valve 6 replace the manual operation handle in the existing hydraulic chain tightener control valve, with simple operation, time and labor saving, and solving the problem of inconvenient manual operation. In addition, the upper handle 6-1 and the lower handle 6-2 in the electromagnetic solenoid pilot valve 6 adopted in the present utility model both have a self-locking function. Even if the handle is released, the hydraulic motor can continue to operate, meeting the requirements of long-term operation.

Claims

1. The pilot-operated motor control valve group for mining use is characterized in that: It includes a valve body (1), on which an electromagnetic pilot valve (6) is provided. The electromagnetic pilot valve (6) is respectively connected to a reversing spool I (7) and a reversing spool II (8). The reversing spool I (7) is sequentially connected to a balance valve I (2) and a hydraulic motor (13), and the reversing spool I (7) is also respectively connected to a balance valve II (3) and a shuttle valve (12); the reversing spool II (8) is sequentially connected to the balance valve II (3) and the hydraulic motor (13), and the reversing spool II (8) is also respectively connected to the balance valve I (2) and the shuttle valve (12); the shuttle valve (12) is connected to a hydraulic reversing valve (9).

2. The mining pilot-type motor control valve group according to claim 1, characterized in that: The electromagnetic pilot valve (6) is also connected to a pilot filter element (10).

3. The mine-used pilot-type motor control valve group according to claim 1, characterized in that: The hydraulic reversing valve (9) is connected to a pressure gauge (5).

4. The mine-used pilot-type motor control valve group according to claim 1, wherein: The reversing spool I (7) and the reversing spool II (8) are respectively connected to a pressure reducing valve (4).

5. The mine-used pilot-type motor control valve group according to claim 1, characterized in that: A check valve (11) is provided between the T port of the valve body (1) and the electromagnetic pilot valve (6).

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