A high-efficiency oil path switching device for a reversing valve of a rock drill

Abstract

The application discloses a high-efficiency oil path switching device of a reversing valve of a rock drill, and belongs to the field of reversing valves, which comprises a reversing valve shell, a reversing valve body is fixedly arranged in the reversing valve shell, a liquid inlet pipe is arranged on the inner wall of the reversing valve body, a compensation assembly and a pure device for improving the working efficiency of the reversing valve are arranged on the inner wall of the liquid inlet pipe, the compensation assembly comprises a sealing cavity and a compensation cavity, a sliding plate is slidably arranged on the inner wall of the compensation cavity, a sliding rod is fixedly arranged on one side of the sliding plate, the end of the sliding rod, which is away from the sliding plate, is slidably arranged on the inner wall of a fixing seat, the fixing seat is fixedly arranged on the inner wall of the compensation cavity, a control spring is arranged on the side, which is close to the sliding plate, of the fixing seat, and the control spring is sleeved on the outer wall of the sliding rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of reversing valve, in particular to a high-efficiency oil path switching device for a rock drill reversing valve. BACKGROUND

[0002] The reversing valve is an important control element in hydraulic and pneumatic systems, which belongs to a kind of directional control valve. By changing the relative working position of the valve core in the valve body, the flow direction of the fluid (hydraulic oil or compressed air) is changed, thereby realizing the movement direction control of the executing element (such as hydraulic cylinder, pneumatic motor, etc.). According to the operation mode, it can be divided into manual reversing valve, mechanical reversing valve, electromagnetic reversing valve, hydraulic reversing valve and electro-hydraulic reversing valve, etc. According to the structural characteristics, there are slide valve type, cone valve type, rotary valve type, etc. In the field of engineering machinery, mining machinery, automatic production line, etc., the reversing valve plays a key role.

[0003] In the rock drilling operation, the rock drill as the core equipment, the oil path switching performance of its reversing valve is directly related to the operation efficiency and equipment stability. In actual work, because the rock drill directly acts on the rock, a large amount of rock powder and debris (particle size is usually 5-100 μm) will be produced in the drilling process, especially in the open-pit mine or tunnel construction, the dust concentration is extremely high (up to hundreds of mg / m 3 ), which makes the hydraulic oil in the reversing valve easily mix with impurities in the working environment of the rock drill, scratch the surface of the valve core and valve sleeve, increase the internal leakage, block the damping hole, and cause the reversing valve to malfunction or impact frequency to decrease.

[0004] In the prior art, a pure device is often arranged to hinder the impurities from entering the reversing valve through the hydraulic oil, so as to maintain the purity of the hydraulic oil and reduce the damage to the reversing valve. However, after a long time of using the rock drill, impurities are easily attached to the pure device, which affects the flow of the hydraulic oil in the reversing valve, and thus the hydraulic oil in the reversing valve cannot be replenished in time in the long-term high-frequency switching, which weakens the stability of the oil path pressure, easily intensifies the fatigue of the parts, and shortens the service life of the equipment.

[0005] Therefore, we design a high-efficiency oil path switching device for a rock drill reversing valve. SUMMARY

[0006] The main purpose of the present application is to provide a high-efficiency oil path switching device for a rock drill reversing valve, which aims to solve the problem that the pure device in the prior art is blocked after a long time of working, affecting the normal operation of the rock drill and the reversing valve.

[0007] In order to solve the above problems, the present application provides a high-efficiency oil path switching device for a reversing valve of a rock drill, which comprises a reversing valve shell, a reversing valve body fixedly installed inside the reversing valve shell, a liquid inlet pipe provided on the inner wall of the reversing valve body, a compensation assembly and a purification device provided on the inner wall of the liquid inlet pipe for improving the working efficiency of the reversing valve, wherein the compensation assembly is arranged above the purification device;

[0008] The compensation assembly comprises a sealing cavity and a compensation cavity, the sealing cavity is fixedly installed on the outer wall of the liquid inlet pipe, the compensation cavity is fixedly installed on one side of the sealing cavity, a replenishing assembly is arranged between the sealing cavity and the compensation cavity for automatically replenishing the hydraulic oil in the compensation cavity, a sliding plate is slidingly installed on the inner wall of the compensation cavity, a sliding rod is fixedly installed on one side of the sliding plate, one end of the sliding rod away from the sliding plate is slidingly installed on the inner wall of a fixed seat, the fixed seat is fixedly installed on the inner wall of the compensation cavity, a control spring is installed on the side of the fixed seat close to the sliding plate, and the control spring is sleeved on the outer wall of the sliding rod.

[0009] Preferably, a butt block is fixedly installed on the top end of the sliding plate, the butt block is slidingly installed on the inner side of a sliding groove, the sliding groove is arranged at the top end of the compensation cavity, and a sealing plate is fixedly installed on the outer wall of the bottom end of the butt block.

[0010] Preferably, the distance between the two sides of the sealing plate and the distance between the two ends are both greater than the distance between the two sides of the sliding groove and the distance between the two ends, and the end of the sealing plate close to the butt block extends to one side thereof.

[0011] Preferably, a butt clamp is arranged on one side of the butt block, a driving rod is fixedly installed on one side of the butt clamp, a guide seat is slidingly installed on the outer wall of the driving rod, the guide seat is fixedly installed on the top end of the compensation cavity, a first rotating block is fixedly installed on the other end of the driving rod away from the butt clamp, a connecting rod is rotatably installed on one end of the first rotating block away from the driving rod, a second rotating block is rotatably installed on one side of the connecting rod, a rotating wheel is fixedly installed on one side of the rotating shaft of the second rotating block, a cross rod is fixedly installed on the inner side of the rotating wheel, the cross rod passes through the shaft of the rotating wheel, a rotating shaft is fixedly installed on the shaft of the rotating wheel, the rotating shaft is rotatably installed on the top end of the compensation cavity, a first motor is arranged on one end of the rotating shaft away from the rotating wheel, and the first motor is connected with an external power source through wires.

[0012] Preferably, a clamping groove is arranged on the outer wall of the butt block and engages with the butt clamp, so as to guide and position the butt clamp to improve the stability of the compensation assembly.

[0013] Preferably, the compensation assembly comprises a first partition plate arranged on one side of the compensation cavity, the first partition plate is rotatably arranged on one side of the compensation cavity, an inner wall at the bottom end of the first partition plate is provided with a rotating shaft, the rotating shaft is fixedly arranged on the inner wall of the sealing cavity, one side of the rotating shaft is provided with a second motor, the top end of the first partition plate is rotatably arranged with a second partition plate, and the two sides of the second partition plate are fixedly arranged with auxiliary partition plates.

[0014] Preferably, the inner wall of the sealing cavity is fixedly arranged with a placing plate near one side of the compensation cavity, and the placing plate is provided with a placing groove on one side.

[0015] Preferably, the first partition plate is symmetrically arranged with a first limiting block on one side, and the first partition plate is symmetrically arranged with a second limiting block on the other side.

[0016] An angle is arranged between the first limiting block and the first partition plate, and the second limiting block is arranged in parallel with the first partition plate.

[0017] Preferably, the placing groove is symmetrically provided with a first auxiliary groove on one side, and the placing plate is symmetrically provided with a second auxiliary groove on one side.

[0018] The beneficial effects of the present application over the prior art are:

[0019] By arranging the compensation assembly, when the flow in the oil circuit is insufficient, the hydraulic oil flow can be automatically compensated, so that the stability and reliability of the reversing valve operation can be maintained. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a schematic diagram of the overall structure of the reversing valve of the present application;

[0022] Figure 2 is a schematic diagram of the cross-sectional structure of the reversing valve of the present application;

[0023] Figure 3 is an enlarged view of position A in the present application; Figure 2

[0024] Figure 4 is a schematic diagram of the cross-sectional structure of the compensation assembly of the present application;

[0025] Figure 5 is an enlarged view of position B in the present application; Figure 4 ​​

[0026] Figure 6 is the first partition of the present application Figure 4 is an enlarged view of C in the present application

[0027] Figure 7 is a structural schematic view of the first partition of the present application.

[0028] The reference signs are explained as follows:

[0029] 1, reversing valve shell; 2, reversing valve body; 3, liquid inlet pipe; 4, purification device; 5, sealing cavity; 6, compensation cavity; 7, sliding plate; 8, sliding rod; 9, fixed seat; 10, control spring; 11, abutting block; 12, sliding groove; 13, sealing plate; 14, abutting clamp; 15, driving rod; 16, guide seat; 17, first rotating block; 18, connecting rod; 19, second rotating block; 20, rotating wheel; 21, rotating shaft; 22, first motor; 23, first partition; 24, second partition; 25, auxiliary partition; 26, placing plate; 27, placing groove; 28, first limiting block; 29, second limiting block; 30, first auxiliary groove; 31, second auxiliary groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] The present application provides a high-efficiency oil path switching device for a reversing valve of a rock drill, which can automatically compensate the hydraulic oil flow when the flow in the oil path is insufficient, ensure sufficient hydraulic oil in the reversing valve, and enable the reversing valve to normally perform high-frequency switching operation, thereby maintaining the stability and reliability of the reversing valve operation.

[0032] Embodiment one

[0033] In the present embodiment, a high-efficiency oil path switching device for a reversing valve of a rock drill has a structure as shown in Figures 1 to 7 The reversing valve of the present application includes a reversing valve shell 1, and a reversing valve body 2 is fixedly installed inside the reversing valve shell 1. The inner wall of the reversing valve body 2 is provided with a liquid inlet pipe 3, and the inner wall of the liquid inlet pipe 3 is provided with a compensation assembly and a purification device 4 for improving the working efficiency of the reversing valve.

[0034] The pure device 4 is arranged to separate and purify the hydraulic oil passing through, so that the pure hydraulic oil enters the reversing valve, the compensation assembly is arranged above the pure device 4, the inner wall of the reversing valve body 2 is further provided with a valve core, a buffer spring, a push rod, a lower channel and an upper channel, the lower channel is arranged on both sides of the liquid inlet pipe 3, the upper channel is arranged on one side above the lower channel, the valve core is slidably arranged on the inner wall of the reversing valve body 2, one side of the valve core is provided with the buffer spring, and the other side of the valve core is fixedly provided with the push rod;

[0035] The valve core is switched back and forth by the push rod and the buffer spring, so that the valve core drives the liquid inlet pipe 3 to be connected with the two upper channels intermittently, and drives the two upper channels to be connected with the lower channel intermittently, so that the drill bit in the rock drill is extended and retracted and impacts, and the rock drilling operation is performed;

[0036] As shown in Figures 2 to 4 , the compensation assembly includes a sealing cavity 5 and a compensation cavity 6, the sealing cavity 5 is fixedly installed on the outer wall of the liquid inlet pipe 3, the sealing cavity 5 is fixedly provided with the compensation cavity 6 on one side, a supplement assembly for automatically supplementing the hydraulic oil in the compensation cavity 6 is arranged between the sealing cavity 5 and the compensation cavity 6, a sliding plate 7 is slidably arranged on the inner wall of the compensation cavity 6, the sliding plate 7 is fixedly provided with a sliding rod 8 on one side, the sliding rod 8 is slidably arranged on the inner wall of a fixed seat 9 away from the sliding plate 7, the fixed seat 9 is fixedly arranged on the inner wall of the compensation cavity 6, a control spring 10 is arranged on the side of the fixed seat 9 close to the sliding plate 7, and the control spring 10 is sleeved on the outer wall of the sliding rod 8, wherein the diameter of the part of the sliding rod 8 close to the sliding plate 7 is greater than the diameter of the part of the sliding rod 8 away from the sliding plate 7, and the control spring 10 is wound on the outer wall of the part of the sliding rod 8 with smaller diameter, so that the control spring 10 exerts an elastic force on the sliding rod 8 by abutting against one side of the part of the sliding rod 8 with larger diameter;

[0037] In this way, when the hydraulic oil flows in the liquid inlet pipe 3, the hydraulic oil pressure F 油 on one side of the sliding plate 7 is equal to the spring thrust F 弹 on the other side of the sliding plate 7, and when more impurities adhere to the pure device 4 to reduce v, according to Bernoulli equation: Although the flow rate v decreases when the flow rate decreases, theoretically, the static pressure P will have a tendency to increase, when the pure device 4 is blocked to reduce the flow rate, the total resistance (including the friction resistance and the local resistance) in the pipeline will increase significantly, according to the principle of fluid mechanics, the fluid needs to overcome the resistance loss energy when flowing in the pipeline, and the increase of the total resistance will cause the pressure loss (i.e. pressure drop) per unit length of the pipeline to increase;

[0038] At this time, the actual Bernoulli equation considering the resistance loss is Where F f is the resistance loss, since the pure device 4 is blocked to greatly increase F f , and Ff The loss of pressure far exceeds the pressure recovery caused by the reduction of flow rate, so the static pressure P at the sliding plate 7 will eventually decrease, at which time F 油 < F 弹 The control spring 10 releases the elastic potential energy to push the sliding plate 7 to move, the sliding plate 7 pushes the hydraulic oil in the compensation chamber 6 to move into the sealed chamber 5 to compensate the flow, and when the sliding plate 7 moves, F 弹 =kx, where k is the spring stiffness and x is the spring compression, at which time x decreases due to the movement of the sliding plate 7, so that F 弹 decreases, and when F 弹 equals F 油 , the sliding plate 7 is balanced and stationary again.

[0039] The existing technology pure device 4 is blocked after a long time of work, which affects the flow of hydraulic oil in the reversing valve, and further causes the hydraulic oil in the reversing valve to be unable to be replenished in time in long-term high-frequency switching, which weakens the stability of the oil circuit pressure, easily aggravates the fatigue of the components, and shortens the service life of the equipment. After the compensation assembly in the embodiment is adopted, the hydraulic oil flow can be automatically compensated when the flow in the oil circuit is insufficient, enough pure hydraulic oil is ensured in the reversing valve, the reversing valve can normally perform high-frequency switching operation, and the stability and reliability of the reversing valve operation are maintained.

[0040] Further, in the embodiment, as shown in Figure 4 and Figure 5 , the top end of the sliding plate 7 is fixedly installed with an abutting block 11, the abutting block 11 is slidingly installed on the inner side of a sliding groove 12, the sliding groove 12 is opened at the top end of the compensation chamber 6, one side of the abutting block 11 abuts against an abutting clamp 14, one side of the abutting clamp 14 is fixedly installed with a driving rod 15, the outer wall of the driving rod 15 is slidingly installed with a guide seat 16, the guide seat 16 is fixedly installed at the top end of the compensation chamber 6, the other end of the driving rod 15 away from the abutting clamp 14 is fixedly installed with a first rotating block 17, one end of the first rotating block 17 away from the driving rod 15 is rotatably installed with a connecting rod 18, one side of the connecting rod 18 is rotatably installed with a second rotating block 19, one side of the rotating shaft of the second rotating block 19 is fixedly installed with a rotating wheel 20, the inner side of the rotating wheel 20 is fixedly installed with a cross rod, the cross rod passes through the shaft of the rotating wheel 20, and the shaft of the rotating wheel 20 is fixedly installed with a rotating shaft 21; the rotating shaft 21 is rotatably installed at the top end of the compensation chamber 6, and the other end of the rotating shaft 21 away from the rotating wheel 20 is provided with a first motor 22, and the first motor 22 is connected with an external power supply through wires.

[0041] In this way, when the push rod pushes the valve core to move, the first motor 22 is synchronously driven to rotate the rotating shaft 21 by 90 degrees, so that the rotating shaft 21 drives the abutting clamp 14 to abut against one side of the abutting block 11 through the rotating wheel 20, the second rotating block 19, the connecting rod 18, the first rotating block 17 and the driving rod 15, and drives the abutting block 11 to move, so that the abutting block 11 drives the sliding plate 7 to move away from the sealing cavity 5, avoiding the problem that when the push rod pushes the valve core to move, the flow rate of the hydraulic oil in the inlet pipe 3 is zero, so that the pressure on one side of the sliding plate 7 is suddenly reduced, causing the control spring 10 to release the elastic potential energy to push the sliding plate 7 to move a larger distance, and then causing the amount of hydraulic oil in the compensation cavity 6 to decrease, and when the inlet pipe 3 is reconnected, the elastic potential energy of the control spring 10 is insufficient, affecting the subsequent compensation operation;

[0042] At the same time, it can also prevent the amount of hydraulic oil in the compensation cavity 6 from being too small, so that when the inlet pipe 3 is reconnected, part of the hydraulic oil in the inlet pipe 3 will flow into the compensation cavity 6 according to Bernoulli's equation, thereby supplementing the hydraulic oil in the compensation cavity 6. Compared with the case where the compensation cavity 6 stores sufficient hydraulic oil, the flow rate of the hydraulic oil flowing into the reversing valve is reduced in the first time, thereby avoiding affecting the working efficiency and effect of the reversing valve. At this time, the push rod continues to push the valve core to move, and the first motor 22 drives the rotating shaft 21 to rotate in the opposite direction by 90 degrees, so that the rotating shaft 21 drives the abutting clamp 14 to move away from one side of the abutting block 11 through the rotating wheel 20, the second rotating block 19, the connecting rod 18, the first rotating block 17 and the driving rod 15, so that the abutting clamp 14 stops limiting the abutting block 11;

[0043] It is worth mentioning that the drive of the push rod can be hydraulic drive designed by the area difference of the two ends of the valve core, or pneumatic drive by the alternating change of the air pressure of the two ends of the valve core. In the embodiment, mechanical structure drive is preferred. Specifically, the cam on the main shaft of the rock drill can be rotated to drive the lever mechanism to push the reversing valve core, so as to realize periodic reversing. In this way, the reciprocating period of the reversing valve core can be accurately controlled, so that the periodic operation of the first motor 22 is better matched, and the device is more accurate and stable. In addition, it should be noted that in other embodiments, the first motor 22 can be driven by a gear transmission structure, so that the movement of the push rod can drive the rotating wheel 20 to rotate. At this time, through the structural arrangement of the driving rod 15, the first rotating block 17, the connecting rod 18, the second rotating block 19, the rotating wheel 20 and the rotating shaft 21, the abutting clamp 14 can be driven to perform the same reciprocating motion regardless of the forward or backward movement of the push rod.

[0044] Further, in the embodiment, the outer wall of the bottom end of the abutting block 11 is fixedly installed with a sealing plate 13, the distance between the two sides of the sealing plate 13 is greater than the distance between the two ends, and the distance between the two sides of the sliding groove 12 is greater than the distance between the two ends, and the end of the sealing plate 13 close to the abutting block 11 extends to one side thereof. In this way, the sealing plate 13 and the sliding plate 7 can seal the compensation cavity 6, preventing the hydraulic oil from leaking during the movement of the sliding plate 7 and affecting the working effect of the compensation cavity 6. In addition, the outer wall of the abutting block 11 is provided with a clamping groove, which guides the abutting clamp 14. When the abutting clamp 14 abuts against the abutting block 11 and pushes the abutting block 11, the abutting clamp 14 and the clamping groove are mechanically engaged to form a rigid connection, so that the abutting block 11 and the abutting clamp 14 move synchronously, avoid sliding loss, and make the thrust distribution more uniform.

[0045] Embodiment two

[0046] In order to supplement the explanation on the basis of embodiment one, in the embodiment, as shown in Figure 4 、 Figure 6 and Figure 7 , the supplementary assembly includes a first partition plate 23 arranged on one side of the compensation cavity 6. The first partition plate 23 is rotatably installed on one side of the compensation cavity 6. The inner wall of the bottom end of the first partition plate 23 is provided with a rotating shaft, and the rotating shaft is fixedly installed on the inner wall of the sealing cavity 5. One side of the rotating shaft is provided with a second motor, and the second motor is connected with the external power supply through wires (the second motor is not shown in the figure, and the second motor and the above-mentioned first motor 22 are both selected as type LW100. Since the first motor 22 and the second motor are both mature existing technologies, the internal structure and working principle thereof will not be described in detail). The top end of the first partition plate 23 is rotatably installed with a second partition plate 24, wherein the inner wall of the end of the second partition plate 24 away from the first partition plate 23 is provided with a counterweight, and the two sides of the second partition plate 24 are fixedly installed with auxiliary partition plates 25.

[0047] Further, one side of the first partition plate 23 is symmetrically provided with a first limiting block 28, and the other side of the first partition plate 23 is symmetrically provided with a second limiting block 29. The first limiting block 28 is arranged at an angle with the first partition plate 23, and the second limiting block 29 is arranged parallel to the first partition plate 23. In this way, when the rock drill stops working, the first partition plate 23 is driven to rotate by the second motor, the first partition plate 23 drives the second partition plate 24 to rotate through the first limiting block 28, the second partition plate 24 is tilted under the action of the gravity of the counterweight, and the rotation range of the second partition plate 24 is limited by the first limiting block 28, so that the second partition plate 24 and the first partition plate 23 form a suitable angle. At this time, the hydraulic oil in the liquid inlet pipe 3 loses the water pump power and falls, the tilted second partition plate 24 can guide and collect the falling hydraulic oil, so that the hydraulic oil flows into the compensation cavity 6 for compensation and collection, and the auxiliary partition plate 25 stores the hydraulic oil, facilitating the compensation operation when the rock drill starts next time, avoiding the problem that when the rock drill stops, the hydraulic oil in the compensation cavity 6 flows into the oil tank along the liquid inlet pipe 3, so that when the hydraulic oil is driven by the water pump through the liquid inlet pipe 3 next time, the hydraulic oil is supplemented in the compensation cavity 6, thereby affecting the working efficiency of the reversing valve and the rock drill.

[0048] The two sides of the top end of the second partition plate 24 are also provided with inclined blocks which are fixedly installed on the inner wall of the sealing cavity 5 and can guide the hydraulic oil, thereby further improving the collection efficiency of the compensation assembly, improving the starting efficiency of the compensation assembly, reducing the obstruction effect of the pure equipment 4 on the flow, and improving the working efficiency of the rock drill.

[0049] Further, in the present embodiment, a placement plate 26 is fixedly installed on one side of the inner wall of the sealing cavity 5 close to the compensation cavity 6. A placement groove 27 is formed on one side of the placement plate 26. When the rock drill starts, the first partition plate 23 is driven to rotate into the placement groove 27 by the second motor. At this time, the placement groove 27 drives the second partition plate 24 to rotate by the second limiting block 29, so that the second partition plate 24 is parallel to the first partition plate 23 and is placed in the placement plate 26, avoiding the problem that the second partition plate 24 hinders the hydraulic oil in the liquid inlet pipe 3 and affects the normal operation of the reversing valve when the reversing valve works.

[0050] At the same time, a first auxiliary groove 30 is symmetrically formed on one side of the placement groove 27, and a second auxiliary groove 31 is symmetrically formed on one side of the placement plate 26, so that when the first partition plate 23 drives the second partition plate 24 to move into the placement plate 26, the first limiting block 28 can move to the inner wall of the first auxiliary groove 30, and the auxiliary partition plate 25 can move to the inner wall of the second auxiliary groove 31, avoiding the problem that the auxiliary partition plate 25 or the first limiting block 28 abuts against the placement plate 26 or the placement groove 27, causing motion interference.

[0051] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural changes made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A reversing valve oil path switching device for a rock drill, comprising a reversing valve housing (1), a reversing valve body (2) is fixedly installed inside the reversing valve housing (1), and a liquid inlet pipe (3) is arranged on the inner wall of the reversing valve body (2), characterized in that, The inner wall of the liquid inlet pipe (3) is provided with a compensation assembly and a purification device (4) for improving the working efficiency of the reversing valve, and the compensation assembly is arranged above the purification device (4); The compensation assembly comprises a sealing cavity (5) and a compensation cavity (6), the sealing cavity (5) is fixedly installed on the outer wall of the liquid inlet pipe (3), one side of the sealing cavity (5) is fixedly installed with the compensation cavity (6), a supplement assembly for automatically supplementing the hydraulic oil in the compensation cavity (6) is arranged between the sealing cavity (5) and the compensation cavity (6), a sliding plate (7) is slidingly installed on the inner wall of the compensation cavity (6), one side of the sliding plate (7) is fixedly installed with a sliding rod (8), one end of the sliding rod (8) away from the sliding plate (7) is slidingly installed on the inner wall of a fixed seat (9), the fixed seat (9) is fixedly installed on the inner wall of the compensation cavity (6), a control spring (10) is installed on one side of the fixed seat (9) close to the sliding plate (7), and the control spring (10) is sleeved on the outer wall of the sliding rod (8); The supplement assembly comprises a first partition plate (23) arranged on one side of the compensation cavity (6), the first partition plate (23) is rotatably installed on one side of the compensation cavity (6), the inner wall of the bottom end of the first partition plate (23) is provided with a rotating shaft, the rotating shaft is fixedly installed on the inner wall of the sealing cavity (5), one side of the rotating shaft is provided with a second motor, and the top end of the first partition plate (23) is rotatably installed with a second partition plate (24), both sides of the second partition plate (24) are fixedly installed with auxiliary partition plates (25).

2. A reversing valve oil passage switching device for a rock drill as set forth in claim 1, characterized in that, The top end of the sliding plate (7) is fixedly installed with an abutting block (11), the abutting block (11) is slidingly installed in the inner side of a sliding groove (12), the sliding groove (12) is opened at the top end of the compensation cavity (6), and the outer wall of the bottom end of the abutting block (11) is fixedly installed with a sealing plate (13).

3. A reversing valve oil passage switching device for a rock drill as set forth in claim 2, characterized in that, The distance between the two sides of the sealing plate (13) and the distance between the two ends are both greater than the distance between the two sides of the sliding groove (12) and the distance between the two ends, and one end of the sealing plate (13) close to the abutting block (11) extends to one side thereof.

4. A reversing valve oil passage switching device for a rock drill as set forth in claim 3, characterized in that One side of the abutting block (11) is abutted with an abutting clamp (14), one side of the abutting clamp (14) is fixedly installed with a driving rod (15), the outer wall of the driving rod (15) is slidingly installed with a guide seat (16), and the guide seat (16) is fixedly installed at the top end of the compensation cavity (6); The other end of the driving rod (15) away from the abutting clamp (14) is fixedly installed with a first rotating block (17), one end of the first rotating block (17) away from the driving rod (15) is rotatably installed with a connecting rod (18), one side of the connecting rod (18) is rotatably installed with a second rotating block (19), and one side of the rotating shaft of the second rotating block (19) is fixedly installed with a rotating wheel (20). The inner side of the rotating wheel (20) is fixedly installed with a cross rod which passes through the shaft center of the rotating wheel (20), the shaft center of the rotating wheel (20) is fixedly installed with a rotating shaft (21), the rotating shaft (21) is rotatably installed at the top end of the compensation cavity (6), and the end of the rotating shaft (21) away from the rotating wheel (20) is provided with a first motor (22), the first motor (22) is connected with an external power supply through wires.

5. A reversing valve oil passage switching device for a rock drill as set forth in claim 2, characterized by The outer wall of the abutting block (11) is provided with a clamping groove which is engaged with the abutting clamp (14), so as to guide and position the abutting clamp (14) and improve the stability of the compensation assembly.

6. A reversing valve oil passage switching device for a rock drill as set forth in claim 1, characterized by The inner wall of the sealing cavity (5) is fixedly installed with a placing plate (26) close to the compensation cavity (6), and the placing plate (26) is provided with a placing groove (27) on one side.

7. A reversing valve oil passage switching device for a rock drill as set forth in claim 1, characterized by The first limiting block (28) is symmetrically installed on one side of the first partition plate (23), the second limiting block (29) is symmetrically installed on the other side of the first partition plate (23), the first limiting block (28) is arranged at an angle with the first partition plate (23), and the second limiting block (29) is arranged in parallel with the first partition plate (23).

8. A directional valve oil passage switching device for a rock drill as defined in claim 6, characterized in that, The placing groove (27) is symmetrically provided with a first auxiliary groove (30) on one side, and the placing plate (26) is symmetrically provided with a second auxiliary groove (31) on one side.

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