Rock drill suitable for multiple working conditions

Abstract

The utility model provides a rock drill adapting to multiple working conditions, which comprises a cylinder body, a piston rod, a reversing valve, a flow control valve for controlling the oil return flow of the reversing valve and a stroke control valve for controlling the stroke of the piston rod, the reversing valve is provided with a port P, a port A, a port B and a cavity C, the cylinder body is provided with a port A1, a port P2, a port X1, a port T1, a port T2 and a port B1, and the port A1, the port P2, the port X1, the port T1, the port T2 and the port B1 are communicated with the port A1. The flow control valve is provided with a T3 port, a T4 port and an external control port P2, the stroke control valve is provided with an external control port P1, and the reversing valve, the flow control valve and the stroke control valve are respectively provided with a T port; the port A1 is communicated with the port A, the port P is connected with the port P2, the port B is connected with the port B1, the cavity C is connected with the port X1, the port T1 and the port T2 are respectively connected with a stroke control valve, and the port T4 is connected with the port B through a throttling hole. The piston rod can have four working modes, more complex working condition requirements are met, and the problems that in the prior art, the working modes are simple, and more complex working condition requirements cannot be met are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of rock drill reversing control equipment, and in particular to a rock drill adaptable to multiple working conditions. Background Technology

[0002] In existing technologies, hydraulic rock drill punches are equipped with reversing control structures, which can be implemented using hydraulic drive. For example, Chinese Patent CN102155154B provides a pressure-controlled automatic reversing working device for a rock drill punch. This reversing working device offers advantages such as fast return speed, high impact energy utilization, automatic adjustment of impact frequency based on rock softness, high drilling efficiency, and low energy consumption. However, it still suffers from a relatively simple working mode, failing to meet the needs of more complex working conditions. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a rock drill that is adaptable to multiple working conditions, which solves the problem that the working mode of the existing technology is relatively simple and cannot meet the needs of more complex working conditions.

[0004] According to an embodiment of this utility model, a rock drill adaptable to multiple working conditions includes a cylinder and a piston rod, a directional valve, a flow control valve for controlling the return oil flow of the directional valve, and a stroke control valve for controlling the stroke of the piston rod. The directional valve is provided with port P, port A, port B, and chamber C. The cylinder is provided with port A1, port P2, port X1, port T1, port T2, and port B1. The flow control valve is provided with port T3, port T4, and external control port P2. The stroke control valve is provided with external control port P1. The directional valve, flow control valve, and stroke control valve are each provided with port T. Ports A1 and A are connected, ports P and P2 are connected, ports B and B1 are connected, chamber C and port X1 are connected, ports T1 and T2 are respectively connected to the stroke control valve, and port T4 is connected to port B through a throttling orifice. The cross-sectional areas at points S1, S2, and S3 on the directional valve are S1 < S2 < S3. By using a flow control valve and a stroke control valve in conjunction with a directional valve, the piston rod can have four working modes to meet more complex working conditions, thus solving the problem that the existing technology has relatively simple working modes and cannot meet more complex working conditions.

[0005] Furthermore, the piston rod is provided with a groove connecting the X1 port and the T1 port.

[0006] Furthermore, the piston rod is provided with a groove connecting port B1 and port T2.

[0007] Furthermore, the throttling ratio of the throttling orifice is 1 / 2.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] By using a flow control valve and a stroke control valve in conjunction with a directional valve, the piston rod can have four working modes to meet more complex working conditions, thus solving the problem that the existing technology has relatively simple working modes and cannot meet more complex working conditions. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 1 ;

[0011] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 2 ;

[0012] In the above attached figures:

[0013] 1. Cylinder block; 2. Piston rod; 3. Directional control valve; 4. Flow control valve; 5. Stroke control valve; 6. Throttling orifice. Detailed Implementation

[0014] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] In an exemplary implementation, such as Figure 1 , 2As shown, this embodiment provides a rock drill adaptable to multiple working conditions, which includes a cylinder body 1 and a piston rod 2, a reversing valve 3, a flow control valve 4 for controlling the return oil flow of the reversing valve 3, and a stroke control valve 5 for controlling the stroke of the piston rod 2. The reversing valve 3 is provided with a P port, an A port, a B port, and a C chamber. The cylinder body 11 is provided with an A1 port, a P2 port, an X1 port, a T1 port, a T2 port, and a B1 port. The flow control valve 4 is provided with a T3 port, a T4 port, and an external control port P2. The stroke control valve 5 is provided with an external control port P1. The reversing valve 3, the flow control valve 4, and the stroke control valve 5 are each provided with... Port T; Port A1 is connected to Port A, Port P is connected to Port P2, Port B is connected to Port B1, and Chamber C is connected to Port X1. Ports T1 and T2 are connected to the stroke control valve 5 respectively, and Port T4 is connected to Port B through the throttle orifice 6. The cross-sectional areas at points S1, S2, and S3 on the directional valve 3 are S1 < S2 < S3. More specifically, the piston rod 2 has a groove connecting Port X1 and Port T1, and a groove connecting Port B1 and Port T2. The throttle orifice 6 has a throttling ratio of 1 / 2 (achieved by setting a throttle valve at the throttle orifice 6, which supplies 1 / 2 of the high-pressure oil).

[0017] In this design, the flow control valve 4 and stroke control valve 5, in conjunction with the directional valve 3, enable the piston rod 2 to have four operating modes to meet more complex working conditions, specifically including:

[0018] 1. For example Figure 1 As shown, both external control ports P2 and P1 are closed. High-pressure oil enters from port P on the reversing valve 3, connecting port P and port A, and port B and port T. (At this time, since external control port P2 is closed, no high-pressure oil enters external control port P1. The return oil in piston rod 2 will return through port B via the throttle orifice 6. Since the throttle orifice 6 has a throttling ratio of 1 / 2, the high-pressure oil volume is reduced by 1 / 2, so the piston rod 2's running speed decreases, and the frequency slows down, resulting in a low-frequency state.) This continues until piston rod 2 closes port P2. Then, piston rod 2 continues to retract, connecting port X1 and port T1 in the middle groove of piston rod 2 (at this time, external control port P1 is closed, and port T2 is closed). High-pressure oil in chamber C returns through port T1. At this time, since S3-S2>0, the reversing valve 3 will move to the right. Figure 2 Position shown: At this time, the reversing valve 3 is connected to port P and port B, and port A and port T; the piston rod 2 at position S5 becomes the high-pressure oil action surface. During this process, due to the kinetic energy of the piston rod 2, the piston rod 2 will gradually decelerate until it stops. When the piston rod 2 stops, since there is always high-pressure oil acting on it at S5, the piston rod 2 will reverse and rush forward. When the middle of the piston rod 2 connects port X1 and port P2 through the groove, and simultaneously closes port X1 and port T1, oil enters chamber C. Since S3-S1>S3-S2, the reversing valve 3 will reverse again to... Figure 1 At the position shown, piston rod 2 performs work on the outside to complete the entire motion process;

[0019] 2. When the external control port P1 is connected to high-pressure oil and the external control port P2 is closed, the valve core in the stroke control valve 5 moves to the right to close port T1 and open port T2 at the same time. This process is a long stroke circuit, and its entire working process is the same as 1. At this time, it is a long stroke circuit and a low frequency state. However, due to the increased stroke of piston rod 2, the external output power increases. This process is a low frequency half speed state.

[0020] 3. When external control port P1 is closed and external control port P2 is connected to high-pressure oil, the valve core in the flow control valve 4 moves to the right. At this time, the oil returning from port B does not pass through the throttle hole 6 and returns directly to port T. Its action process is the same as 1. At this time, the piston rod 2 moves faster and is in a high-frequency state. This process is a high-frequency short stroke full speed state.

[0021] 4. When high-pressure oil is connected to both external control port P1 and external control port P2 at the same time, the valve core in the stroke control valve 5 moves to the right to close port T2, and at the same time connects the long stroke port T2 of piston rod 2. The valve core in the flow control valve 4 moves to the right. At this time, the oil returning from port B does not pass through the throttle orifice 6, but directly returns to port T. Its movement process is the same as 1. This process is a high-frequency long stroke full speed state.

[0022] In this scheme, it is precisely because of the changes in the stroke of piston rod 2 and the return oil flow at port B that piston rod 2 can output four different frequencies and impact forces to meet the more complex working conditions on site.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rock drill adaptable to multiple working conditions, characterized in that, The system includes a cylinder block and a piston rod, a directional control valve, a flow control valve that controls the return flow of the directional control valve, and a stroke control valve that controls the stroke of the piston rod. The directional control valve has ports P, A, B, and C. The cylinder block has ports A1, P2, X1, T1, T2, and B1. The flow control valve has ports T3, T4, and an external control port P2. The stroke control valve has an external control port P1. The directional control valve, flow control valve, and stroke control valve each have a port T. Ports A1 and A are connected, ports P and P2 are connected, ports B and B1 are connected, and the C chamber is connected to port X1. Ports T1 and T2 are connected to the stroke control valve, and port T4 is connected to port B through a throttle orifice. The cross-sectional areas at points S1, S2, and S3 on the directional control valve are in the order S1 < S2 < S3.

2. The rock drill adaptable to multiple working conditions as described in claim 1, characterized in that, The piston rod has a groove connecting the X1 port and the T1 port.

3. The rock drill adaptable to multiple working conditions as described in claim 1, characterized in that, The piston rod has a groove connecting port B1 and port T2.

4. The rock drill adaptable to multiple working conditions as described in claim 1, characterized in that, The throttling ratio of the orifice is 1 / 2.

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