A linkage valve group for tunnel drilling rig

Abstract

The utility model discloses a linkage valve group for a tunnel drilling machine, including a valve block with an oil passage inside, a directional valve I, a directional valve II, a directional valve III, and a directional valve IV installed on one side of the valve block, the directional valve I is a floating selection valve for a power head, and the directional valve II is a feed control valve for a feed oil cylinder; a shuttle valve is inserted on the valve block, the directional valve I is connected to the power head motor through the shuttle valve, and a pressure reducing valve is arranged on the oil circuit between the shuttle valve and the directional valve I; a throttle valve is inserted on the valve block, the directional valve II is connected to the feed oil cylinder through the throttle valve, and a hydraulically controlled reversing valve is arranged on the oil circuit between the throttle valve and the directional valve II. In the utility model, the directional valve I is a floating selection valve for a power head, and the feed oil cylinder compensates for the relative displacement between two drill rods through the rotation of the power head motor; the directional valve II is a feed control valve for the feed oil cylinder, so that the operator can select the relative drilling speed according to the numerical value displayed on the drilling pressure gauge and the needs of the drilling process, so as to achieve the best cutting ability of the drill bit.

Description

Technical Field

[0001] The utility model relates to a full hydraulic tunnel drilling rig, in particular to a linkage valve group for the tunnel drilling rig. Background Art

[0002] As the energy transmission and control mechanism between the power device and the actuator, the linkage valve group is mainly responsible for controlling the orderly connection of the drilling rig's power head, feed cylinder, clamp and hydraulic chuck. However, most valves are connected by pipes, there are many oil pipes and the installation and removal are complicated. The volume of the control cabinet is also relatively large. Not only does the intricate oil pipeline make troubleshooting extremely inconvenient, it also increases the manufacturing and use costs invisibly, and the control cabinet looks bulky and unsightly. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a linkage valve group for a tunnel drilling rig with reasonable design, simple structure and good logic in view of the deficiencies of the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A linkage valve group for a tunnel drilling machine, characterized in that it includes a valve block with an oil passage therein, a directional valve I connected to a power head, a directional valve II connected to a feed cylinder control valve, a directional valve III connected to a clamp, and a directional valve IV connected to a hydraulic chuck are installed on one side of the valve block, wherein the directional valve I is a floating selection valve for the power head, and the directional valve II is a feed cylinder feed control valve;

[0006] A shuttle valve is inserted on the valve block, and the directional valve I is connected to the power head motor through the shuttle valve. A pressure reducing valve is provided on the oil path between the shuttle valve and the directional valve I, and the pressure reducing valve is inserted on the valve block;

[0007] A throttle valve is inserted on the valve block, and the directional valve II is connected to the feed cylinder through the throttle valve. A hydraulically controlled reversing valve is provided on the oil circuit between the throttle valve and the directional valve II, and the hydraulically controlled reversing valve is fixed on the side of the valve block. By installing the throttle valve, during the drilling process, the operator can select the corresponding drilling speed according to the value displayed on the drilling pressure gauge and the needs of the drilling process, so as to achieve the best cutting ability of the drill bit;

[0008] A hydraulically controlled one-way valve is inserted on the valve block. Directional valve III is connected to the clamp through the hydraulically controlled one-way valve, and directional valve IV is connected to the hydraulic chuck through the hydraulically controlled one-way valve. A hydraulically controlled one-way valve is arranged between the two circuits, which solves the problems of leakage of the M-position directional valve system and insufficient pressure holding capacity, which causes accidents caused by automatic closure of the clamp and the hydraulic chuck; an overflow valve is installed on the oil inlet pipeline of directional valve III, and a pressure-limiting valve is installed on the oil inlet pipeline of directional valve IV, which ensures the use of the hydraulic system under rated pressure, avoids overload of the hydraulic pump, and extends the service life of the hydraulic pump.

[0009] The technical problem to be solved by the utility model can also be achieved through the following technical scheme, wherein the valve block is provided with an A1 oil port and a B1 oil port connected to the directional valve I, an A2 oil port and a B2 oil port connected to the directional valve II, an A3 oil port connected to the directional valve III, and an A4 oil port, an A5 oil port, and a B5 oil port connected to the directional valve IV.

[0010] The technical problem to be solved by the utility model can also be achieved through the following technical solution: a lifting ring is provided on the valve block for easy lifting, and the lifting ring is connected to the valve block through a threaded buckle, which is convenient for the operator to install, disassemble and maintain, and brings the greatest convenience to the user to the greatest extent.

[0011] The technical problem to be solved by the utility model can also be achieved through the following technical scheme: an adjusting handle for adjusting the pressure is provided on the overflow valve, and the power head is pressurized and depressurized for drilling by controlling the pressure. Selecting appropriate pressurization and depressurization can not only save power source, but also avoid excessive wear of the drill bit, with stable quality, more complete core and high cost performance.

[0012] The technical problem to be solved by the utility model can also be achieved through the following technical scheme: a spare oil port is provided on the directional valve IV, a quick-change connector is installed at the spare oil port, the A5 oil port and the B5 oil port are spare oil ports, while ensuring the function, the use of hydraulic valves is minimized as much as possible, which is simple and practical.

[0013] The technical problem to be solved by the utility model can also be achieved through the following technical solution: operating handles are installed on the directional valve I, directional valve II, directional valve III and directional valve IV.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] First, an oil channel is set inside the valve block, eliminating the original pipe connection between valves. The connection of the pipeline and the troubleshooting are easier than before, with high safety and small space occupation, which further reduces the size of the control cabinet and makes it easier to carry.

[0016] Second, directional valve I is a floating selection valve for the power head. By operating the power head motor to rotate, the feed cylinder compensates for the relative displacement between the two drill pipes, which not only protects the drill pipe thread buckle, but also is easy to operate and prolongs the service life of the drill pipe.

[0017] Third, directional valve II is the feed control valve of the feed cylinder. By adding a throttle valve to the circuit, the operator can select the corresponding drilling speed according to the value displayed on the drilling pressure gauge and the needs of the drilling process to achieve the best cutting ability of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the linkage valve group for the tunnel drilling rig of the utility model;

[0019] Figure 2 for Figure 1 A top view of

[0020] Figure 3 This is a structural principle diagram of the linkage valve group for the tunnel drilling rig described in the utility model.

[0021] In the figure: 1. Directional valve I, 2. Directional valve II, 3. Directional valve III, 4. Directional valve IV, 5. Overflow valve, 6. Throttle valve, 7. Lifting ring, 8. Valve block, 9. Hydraulic-controlled check valve, 10. Shuttle valve, 11. Hydraulic-controlled reversing valve, 12. Pressure reducing valve, 13. Pressure limiting valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] Reference Figure 1-3 A linkage valve group for a tunnel drilling machine includes a valve block 8 with an oil passage therein, a directional valve I1 connected to a power head, a directional valve II2 connected to a feed cylinder control valve, a directional valve III3 connected to a clamp, and a directional valve IV4 connected to a hydraulic chuck are installed on one side of the valve block; the directional valve I1 is a floating selection valve for the power head, and the directional valve II2 is a feed cylinder feed control valve;

[0025] A shuttle valve 10 is inserted on the valve block 8, and the directional valve I1 is connected to the power head motor through the shuttle valve 10. A pressure reducing valve 12 is provided on the oil path between the shuttle valve 10 and the directional valve I1, and the pressure reducing valve 12 is inserted on the valve block 8;

[0026] A throttle valve 6 is inserted on the valve block 8, and the directional valve II 2 is connected to the feed cylinder through the throttle valve 6. A hydraulically controlled reversing valve 11 is provided on the oil circuit between the throttle valve 6 and the directional valve II 2, and the hydraulically controlled reversing valve 11 is fixed on the side of the valve block;

[0027] A hydraulically controlled one-way valve 9 is inserted on the valve block 8, and the directional valve III3 is connected to the clamper through the hydraulically controlled one-way valve 9, and the directional valve IV4 is connected to the hydraulic chuck through the hydraulically controlled one-way valve 9; an overflow valve 5 is installed on the oil inlet pipeline of the directional valve III3, and a pressure limiting valve 13 is installed on the oil inlet pipeline of the directional valve IV4.

[0028] The valve block 8 is provided with an A1 oil port and a B1 oil port connected to the directional valve I1, an A2 oil port and a B2 oil port connected to the directional valve II2, an A3 oil port connected to the directional valve III3, and an A4 oil port, an A5 oil port, and a B5 oil port connected to the directional valve IV4. The A1 oil port and the B1 oil port are respectively connected to the oil inlet and the oil outlet of the power head motor, the A2 oil port is connected to the upper chamber of the feed cylinder, the B2 oil port is connected to the lower chamber of the feed cylinder, the A3 oil port is connected to the clamp cylinder, the A4 oil port is connected to the hydraulic chuck, the A5 oil port and the B5 oil port are spare oil ports, and quick-change joints are installed at the spare oil ports;

[0029] A lifting ring 7 is provided on the valve block 8 for easy lifting, and the lifting ring 7 is connected to the valve block 8 through a threaded buckle.

[0030] The overflow valve 5 is provided with a regulating handle for adjusting the pressure.

[0031] In the linkage valve group described in the utility model, directional valve I1, directional valve II2, directional valve III3, and directional valve IV4 are fixed on the valve block 8 in sequence, the rotary oil circuit of the power head motor controls the hydraulically controlled reversing valve 11 through the shuttle valve 10 and the pressure reducing valve 12, the directional valve II circuit is provided with a throttle valve 6 to adjust the drilling speed of the feed cylinder, the directional valve III and directional valve IV circuits are respectively provided with hydraulically controlled check valves 9, which are inserted into the valve block, and the two ends of the valve block are provided with lifting rings 7, the hydraulically controlled reversing valve 11 is fixed to the side of the valve block, the feed circuit is provided with an overflow valve 5 for increasing and reducing pressure during drilling, and the linkage valve group system circuit is provided with a pressure limiting valve 13, which ensures that the hydraulic system is used under the rated pressure, avoids overload operation of the hydraulic pump, and prolongs the service life of the hydraulic pump.

[0032] The linkage valve group described in the utility model can be simply adjusted so that the linkage valve group integrates the hydraulic valve on the valve block through a plate connection method and a plug-in connection method. An oil path is arranged inside the valve block, and the pipe connection between the original valve and the valve is cancelled, so as to realize the linkage operation of drilling of the power head, the feed oil cylinder, the clamp and the hydraulic chuck, and has strong logical performance and good safety; the directional valve I is a floating selection valve of the power head, and the feed oil cylinder compensates the relative displacement between the two drill rods by operating the motor rotation of the power head, which not only protects the thread buckle of the drill rod, but also is simple to operate and prolongs the service life of the drill rod; the directional valve II is a feed control valve of the feed oil cylinder, and the circuit is equipped with a throttle valve, so that the operator can select the relative drilling speed according to the value displayed on the drilling pressure gauge and the needs of the drilling process, so as to achieve the best cutting ability of the drill bit; the overflow valve is provided with an adjusting handle, and the pressure of the power head is increased or decreased by controlling the circuit pressure, so that the power source can be saved and the excessive wear of the drill bit can be avoided, the quality is stable, the obtained core is more complete, and the cost performance is high.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A linkage valve group for a tunnel drilling rig, characterized in that: It includes a valve block with an oil passage inside, and a directional valve I connected to the power head, a directional valve II connected to the feed cylinder control valve, a directional valve III connected to the clamp, and a directional valve IV connected to the hydraulic chuck are installed on one side of the valve block, wherein the directional valve I is a floating selection valve of the power head, and the directional valve II is a feed cylinder feed control valve; A shuttle valve is inserted on the valve block, and the directional valve I is connected to the power head motor through the shuttle valve. A pressure reducing valve is provided on the oil path between the shuttle valve and the directional valve I, and the pressure reducing valve is inserted on the valve block; A throttle valve is inserted on the valve block, and the directional valve II is connected to the feed cylinder through the throttle valve. A hydraulically controlled reversing valve is provided on the oil circuit between the throttle valve and the directional valve II, and the hydraulically controlled reversing valve is fixed on the side of the valve block; A hydraulically controlled one-way valve is inserted on the valve block, and the directional valve III is connected to the clamper through the hydraulically controlled one-way valve, and the directional valve IV is connected to the hydraulic chuck through the hydraulically controlled one-way valve; an overflow valve is installed on the oil inlet pipeline of the directional valve III, and a pressure limiting valve is installed on the oil inlet pipeline of the directional valve IV.

2. The linkage valve group for tunnel drilling rig according to claim 1, characterized in that: The valve block is provided with A1 oil port and B1 oil port connected to directional valve I, A2 oil port and B2 oil port connected to directional valve II, A3 oil port connected to directional valve III, and A4 oil port, A5 oil port and B5 oil port connected to directional valve IV.

3. The linkage valve group for tunnel drilling rig according to claim 1, characterized in that: A lifting ring is provided on the valve block for easy lifting, and the lifting ring is connected to the valve block through a threaded buckle.

4. The linkage valve group for tunnel drilling rig according to claim 1, characterized in that: The overflow valve is provided with an adjusting handle for adjusting the pressure.

5. The linkage valve group for tunnel drilling rig according to claim 1, characterized in that: A spare oil port is provided on the directional valve IV, and a quick-change joint is installed at the spare oil port.

6. The linkage valve group for tunnel drilling rig according to claim 1, characterized in that: An operating handle is installed on the directional valve I, directional valve II, directional valve III and directional valve IV.

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