Linkage valve of directional drilling machine

Abstract

A directional drilling machine linkage valve comprises a pilot valve set and a linkage valve set, the linkage valve set comprises an oil inlet valve plate, a linkage valve plate and a brake valve plate, an oil inlet P1 is formed in the oil inlet valve plate, and working ports A1, B1 and A2 are formed in the linkage valve plate; a working port A3 is formed in the brake valve plate; a three-position five-way valve, a two-position four-way valve, a three-position four-way valve, a two-position four-way hydraulic control valve and a two-position three-way hydraulic control valve are formed in the linkage valve plate, the two-position four-way valve, the three-position four-way valve and the two hydraulic control valves are communicated with the oil inlet P1 respectively, and a port A and a port B of the two-position four-way hydraulic control valve and a port A of the two-position three-way hydraulic control valve are correspondingly communicated with the working port respectively. The control ends of the two hydraulic control valves are correspondingly communicated with a port A of the three-position four-way valve and a port A of the two-position four-way valve respectively, and a port A of the three-position five-way valve is communicated with a port B of the three-position four-way valve through a fifth shuttle valve; and the oil outlet ends of the third shuttle valve and the second shuttle valve are correspondingly communicated. The valve is convenient to operate, linkage operation of drilling and braking can be achieved, and the chuck and the clamp holder can be independently controlled.

Description

Technical Field

[0001] The present invention relates to a hydraulic valve, and particularly to a linkage valve for a directional drill rig. Background Art

[0002] A directional drill rig is a pipeline construction tool in the engineering industry, generally used for oil, natural gas and some municipal pipeline construction. After processes such as positioning drilling, reaming, hole cleaning, and pipeline pulling-back with a large directional drill rig, pipeline construction is carried out. During operation, the operator needs to remotely operate the machine outside the directional drill rig, so it is very important to ensure the stable and sensitive operation of the directional drill rig.

[0003] When the directional drill rig is working, it is necessary to adjust the working state of the valve group of the directional drill rig according to the working conditions, and require the valve group to respond quickly. The existing valve groups of directional drill rigs have the following problems:

[0004] 1. The drilling and braking cannot achieve full linkage operation, with many working steps, which is prone to human operation errors;

[0005] 2. It is impossible to control the chuck and the gripper separately, lacking flexibility and being difficult to meet the requirements of different working conditions.

[0006] 3. The logic relationship is complex, the installation position requires a large space, there are many external pipelines, it is inconvenient to find problems and repair and replace, and it requires a high skill level of workers. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a linkage valve for a directional drill rig that is convenient to operate, can achieve the linkage operation of drilling and braking, and can control the chuck and the gripper separately.

[0008] The technical solution of the present invention is as follows:

[0009] A linkage valve for a directional drill rig includes a pilot valve group. The special feature is that a linkage valve group is connected to one side of the pilot valve group. The linkage valve group includes an oil inlet valve plate, a linkage valve plate, and a brake valve plate connected in sequence. An oil inlet P1 and an oil return port T1 are provided on the oil inlet valve plate. Working ports A1, B1, and a working port A2 are provided on the linkage valve plate, which are respectively used to connect the gripper and the chuck; a working port A3 is provided on the brake valve plate for connecting the brake.

[0010] The pilot valve group includes a rotary handle valve, a slow handle valve, and a fast handle valve connected in sequence. An oil inlet P3 is provided outside the rotary handle valve. A first shuttle valve is provided between a pair of oil outlet ports of the rotary handle valve. A second shuttle valve and a third shuttle valve are respectively provided between the oil outlet ports a and between the oil outlet ports b of the slow handle valve and the fast handle valve;

[0011] The linked valve plate forms a manual three-position five-way valve, a two-position four-way valve, a three-position four-way valve, a two-position four-way hydraulic control valve, and a two-position three-way hydraulic control valve through multiple valve stems inside. The P ports of the two-position four-way valve, the three-position four-way valve, the two-position four-way hydraulic control valve, and the two-position three-way hydraulic control valve are respectively connected to the oil inlet P1. The A and B ports of the two-position four-way hydraulic control valve and the A port of the two-position three-way hydraulic control valve are respectively connected to the working ports B1, A1, and the working port A2 correspondingly. The control ends of the two-position four-way hydraulic control valve and the two-position three-way hydraulic control valve are respectively connected to the A ports of the three-position four-way valve and the two-position four-way valve correspondingly. The two-position four-way valve is connected to the B port of the three-position five-way valve. The A port of the three-position five-way valve is connected to the B port of the three-position four-way valve through a fifth shuttle valve arranged inside the linked valve plate. The other oil inlet end of the fifth shuttle valve is connected to the control port K3 arranged on the brake valve plate and is connected to an oil outlet b of the rotary handle valve through an external oil pipe, for realizing the automatic opening of the gripper when controlling the rotation of the motor through the rotary handle valve;

[0012] The P port and P' port of the three-position five-way valve are respectively connected to the oil outlet ends of the third shuttle valve and the second shuttle valve through internal oil channels correspondingly, for realizing the linkage of the gripper and the chuck when controlling the movement of the feed oil cylinder through the slow handle valve and the fast handle valve.

[0013] As a further preference, the brake valve plate forms a hydraulic control two-position three-way valve through a valve stem arranged inside it. The P port of this valve is connected to the oil inlet P1 through a second pressure reducing valve arranged on the brake valve plate. The A port is connected to the working port A3, and the T port is connected to the oil return port T1. Its control end leads out the control port K2 on the brake valve plate and is connected to the oil outlet end of the first shuttle valve through an external oil pipe, for realizing the opening linkage of the brake when controlling the rotation of the motor through the rotary handle valve.

[0014] As a further preference, the T ports of the three-position five-way valve, the two-position four-way valve, the three-position four-way valve, and the two-position four-way hydraulic control valve are respectively connected to the oil return port T1 through internal oil channels. The T port of the two-position three-way hydraulic control valve is connected to the oil return port T2 arranged on the linked valve plate through a flow regulating valve arranged inside the linked valve plate, for controlling the opening speed of the chuck.

[0015] As a further preference, a first pressure reducing valve is arranged between the B port of the two-position four-way hydraulic control valve and the working port A1 on the linked valve plate, for controlling the opening speed of the gripper.

[0016] As a further preference, when the two-position four-way valve is in the lower position, the control end of the two-position three-way hydraulic control valve is connected to the three-position five-way valve, and the oil inlet P1 is disconnected from the oil return port T1, making the chuck in a linked state; when this valve is in the upper position, the oil inlet P1 is connected to the control end of the two-position three-way hydraulic control valve, making the chuck in a single-acting state.

[0017] As a further preference, when the three-position four-way valve is in the middle position, the control end of the two-position four-way hydraulic control valve is connected to the fifth shuttle valve, and the oil inlet P1 and the oil return port T1 are disconnected, so that the gripper is in a linkage state; when the valve is in the upper position, the oil inlet P1 is connected to the control end of the two-position four-way hydraulic control valve, and the oil return port T1 and the fifth shuttle valve are disconnected, so that the gripper is in a single-acting state and opened; when the valve is in the lower position, the control end of the two-position four-way hydraulic control valve is connected to the oil return port T1, and the oil inlet P1 is disconnected from the fifth shuttle valve, so that the gripper is in a single-acting state and clamped.

[0018] As a further preference, when the three-position five-way valve is in the middle position, the two-position four-way valve is connected to the oil return port T1, the P' port is disconnected, and the P port is connected to the fifth shuttle valve. At this time, the linkage valve is in a standby state; when the three-position five-way valve is in the upper position, the P' port is connected to the two-position four-way valve, the P port is connected to the fifth shuttle valve, and the T port is disconnected. At this time, the linkage valve is in a downhole drilling state; when the three-position five-way valve is in the lower position, the P' port is connected to the fifth shuttle valve, the P port is connected to the two-position four-way valve, and the T port is disconnected. At this time, the linkage valve is in an uphole drilling state.

[0019] As a further preference, the first shuttle valve is arranged on the valve block between the rotary handle valve and the slow handle valve, and the second shuttle valve and the third shuttle valve are arranged on the valve block between the slow handle valve and the fast handle valve; a fourth shuttle valve is arranged between a pair of oil outlet ports of the fast handle valve for connecting the control end of the oil inlet propulsion valve plate of the main valve.

[0020] As a further preference, a mud pump handle valve is arranged between the fast handle valve and the oil inlet valve plate for connecting the mud pump truck; the fourth shuttle valve is arranged on the valve block between the fast handle valve and the mud pump handle valve.

[0021] As a further preference, an oil inlet P2 arranged in parallel with the oil inlet P1 is provided on the oil inlet valve plate, and the oil inlets P1 and P2 are simultaneously connected to the oil inlet channel arranged in the oil inlet valve plate to achieve more stable control of the gripper and the chuck; check valves are respectively arranged in the oil inlets P1 and P2 to avoid oil leakage when oil enters through a single oil inlet.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. Since the pilot valve group of the linkage valve is connected to the control ends of the two-position four-way hydraulic control valve and the two-position three-way hydraulic control valve respectively connecting the gripper and the chuck through the three-position five-way valve, the two-position four-way valve and the three-position four-way valve in the linkage valve plate, the linkage of the gripper and the chuck is realized when controlling the rotation of the motor or the telescopic movement of the oil cylinder by controlling the pilot valve group, with full linkage operation ability, convenient operation, which can simplify the working process, reduce the operation steps, significantly improve the system response speed, and at the same time reduce the risk of mistakes caused by manual operation.

[0024] 2. Since both the two-position four-way valve and the three-position four-way valve are manual valves and their P ports are respectively connected to the oil inlet P1, this linkage valve has a single-action function while achieving linkage. It can separately control the chuck and the gripper, and supports free switching, enabling it to flexibly adapt to various operating requirements under different working conditions.

[0025] 3. It has a compact structure, is easy to install, simple to operate, highly practical, and applicable to most working environments. Brief Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of the present invention.

[0027] Figure 2 is Figure 1 the top view of

[0028] Figure 3 is Figure 1 the left view of

[0029] Figure 4 is the schematic principle diagram of the present invention.

[0030] In the figure: rotary handle valve 1, slow handle valve 2, fast handle valve 3, mud pump handle valve 4, oil inlet valve plate 5, linkage valve plate 6, brake valve plate 7, second pressure reducing valve 8, first pressure reducing valve 9, first shuttle valve 10, second shuttle valve 11, third shuttle valve 12, fourth shuttle valve 13, check valve 14, three-position five-way valve 15, two-position four-way valve 16, three-position four-way valve 17, fifth shuttle valve 18, two-position four-way hydraulic control valve 19, two-position three-way hydraulic control valve 20, flow regulating valve 21, hydraulic control two-position three-way valve 22. Detailed Embodiment

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figures 1 to 4 shown, a directional drilling rig linkage valve involved in the present invention includes a pilot valve group, and a linkage valve group is fixedly connected to the right side of the pilot valve group. The pilot valve group includes a rotary handle valve 1, a slow handle valve 2, a fast handle valve 3, and a mud pump handle valve 4 connected in sequence. An oil inlet P3 and an oil return port T3 are provided outside the rotary handle valve 1, and the oil inlet P3 and the oil return port T3 are respectively connected to the P port and the T port of each handle valve in correspondence.

[0033] A pair of oil outlets a and b of the rotary handle valve 1 are used to connect the rotary valve plate of the main valve of the directional drill, so as to control the forward and reverse rotation of the motor of the directional drill; a first shuttle valve 10 is arranged between the pair of oil outlets a and b of the rotary handle valve 1, and the first shuttle valve 10 is arranged on the valve block between the rotary handle valve 1 and the slow handle valve 2. Second shuttle valves 11 and third shuttle valves 12 are respectively arranged between the oil outlets a and between the oil outlets b of the slow handle valve 2 and the fast handle valve 3; the second shuttle valves 11 and the third shuttle valves 12 are arranged on the valve block between the slow handle valve 2 and the fast handle valve 3; a fourth shuttle valve 13 is arranged between the pair of oil outlets a and b of the fast handle valve 3.

[0034] A pair of oil outlets a and b of the slow handle valve 2 are used to connect the posture adjustment valve of the directional drill to control the slow advancement of the feed cylinder; a pair of oil outlets a and b of the fast handle valve 3 are used to connect the fast advancement valve plate of the main valve of the directional drill to control the fast advancement of the feed cylinder. The oil outlet a of the mud pump handle valve 4 is used to connect the mud pump truck, and the oil outlet b is blocked; the fourth shuttle valve 13 is arranged on the valve block between the fast handle valve 3 and the mud pump handle valve 4, and the oil outlet end c2 of the fourth shuttle valve 13 is led out on this valve block to connect to the control end of the oil inlet advancement valve plate of the main valve of the directional drill.

[0035] The linkage valve group includes an oil inlet valve plate 5, a linkage valve plate 6 and a brake valve plate 7 connected in sequence. The oil inlet valve plate 5 is adjacent to the mud pump handle valve 4. An oil inlet P1 and an oil return port T1 are arranged on the oil inlet valve plate 5. Working ports A1, B1 and A2 are arranged on the linkage valve plate 6 and are respectively used to connect the gripper and the chuck; a working port A3 is arranged on the brake valve plate 7 and is used to connect the brake.

[0036] An oil inlet P2 parallel to the oil inlet P1 is arranged on the oil inlet valve plate 5. The oil inlets P1 and P2 are simultaneously communicated with the oil inlet passage arranged in the oil inlet valve plate 5. Check valves 14 are respectively installed in the oil inlets P1 and P2 to avoid oil leakage when oil enters through a single oil inlet.

[0037] The linkage valve plate 6 forms a manual five-port three-position valve 15, a four-port two-position valve 16, a four-port three-position valve 17, a four-port two-position hydraulic control valve 19 and a three-port two-position hydraulic control valve 20 through multiple valve stems inside. The P ports of the four-port two-position valve 16, the four-port three-position valve 17, the four-port two-position hydraulic control valve 19 and the three-port two-position hydraulic control valve 20 are respectively connected to the oil inlets P1 and P2 through internal oil channels. The A and B ports of the four-port two-position hydraulic control valve 19 are respectively connected to the working ports B1 and A1 through internal oil channels correspondingly. The A port of the three-port two-position hydraulic control valve 20 is connected to the working port A2. The control ends of the four-port two-position hydraulic control valve 19 and the three-port two-position hydraulic control valve 20 are respectively connected to the A ports of the four-port three-position valve 17 and the four-port two-position valve 16 in a one-to-one correspondence. The four-port two-position valve 16 is connected to the B port of the five-port three-position valve 15. The A port of the five-port three-position valve 15 is connected to the B port of the four-port three-position valve 17 through the fifth shuttle valve 18 arranged inside the linkage valve plate 6. The other oil inlet end of the fifth shuttle valve 18 is connected to the control port K3 arranged on the brake valve plate 7 and is connected to an oil outlet b of the rotary handle valve 1 through a pipeline externally connected to the control port K3, so as to realize the automatic opening of the gripper when controlling the rotation of the motor through the rotary handle valve 1, and realize the linkage of the gripper and the chuck when controlling the lowering and hoisting of the drill through the five-port three-position valve 15.

[0038] The P port and P' port of the five-port three-position valve 15 are respectively connected to the oil outlet ends of the third shuttle valve 12 and the second shuttle valve 11 through internal oil channels correspondingly, so as to realize the linkage of the gripper and the chuck when controlling the feed cylinder to act through the slow speed handle valve 2 and the fast speed handle valve 3.

[0039] The T ports of the five-port three-position valve 15, the four-port two-position valve 16, the four-port three-position valve 17 and the four-port two-position hydraulic control valve 19 are respectively connected to the oil return port T1 through internal oil channels. The T port of the three-port two-position hydraulic control valve 20 is connected to the oil return port T2 arranged on the linkage valve plate 6 through the flow regulating valve 21 arranged inside the linkage valve plate 6, so as to control the opening speed of the chuck.

[0040] A first pressure reducing valve 9 is arranged between the B port of the four-port two-position hydraulic control valve 19 and the working port A1 on the linkage valve plate 6, and its rated pressure is 13 - 14 Mpa, so as to control the opening speed of the gripper.

[0041] When the four-port two-position hydraulic control valve 19 is in the upper position, its P port is conducted with the A port, and the B port is conducted with the T port; when in the lower position, its P port is conducted with the B port, and the A port is conducted with the T port. When the three-port two-position hydraulic control valve 20 is in the upper position, its P port is conducted with the A port, and the T port is cut off; when in the lower position, its A port is conducted with the T port, and the P port is cut off.

[0042] When the two-position four-way valve 16 is in the lower position, its A and B ports are connected, and the P and T ports are blocked, so that the control end of the two-position three-way hydraulic control valve 20 is connected with the three-position five-way valve 15, and the oil inlets P1 and P2 are disconnected from the oil return port T1, so that the chuck is in a linkage state; when the valve is in the upper position, its P and A ports are connected, and the B and T ports are blocked, so that the oil inlets P1 and P2 are connected with the control end of the two-position three-way hydraulic control valve 20 through the two-position four-way valve 16, so that the chuck is in a single-action state.

[0043] When the three-position four-way valve 17 is in the middle position, its A and B ports are connected, and the P and T ports are cut off, so that the control end of the two-position four-way hydraulic control valve 19 is connected with the oil outlet end of the fifth shuttle valve 18, and the oil inlet P1 and the oil return port T1 are disconnected, so that the clamp is in a linkage state; when the valve is in the upper position, its P and A ports are connected, and the B and T ports are cut off, so that the oil inlet P1 is connected with the control end of the two-position four-way hydraulic control valve 19, and the oil return port T1 and the fifth shuttle valve 18 are disconnected, so that the clamp is in a single-action state and opened; when the valve is in the lower position, its A and T ports are connected, and the P and B ports are cut off, so that the control end of the two-position four-way hydraulic control valve 19 is connected with the oil return port T1, and the oil inlet P1 and the fifth shuttle valve 18 are disconnected, so that the clamp is in a single-action state and clamped.

[0044] When the three-position five-way valve 15 is in the middle position, its P and A ports are connected, B and T ports are connected, and P' port is cut off, so that the B port of the two-position four-way valve 16 is connected to the oil return port T1, the P' port is disconnected, and the P port is connected to the fifth shuttle valve 18. At this time, the linkage valve is in a standby state; when the three-position five-way valve 15 is in the upper position, its P' and B ports are connected, and the P and A ports are connected, so that the P' port is connected to the two-position four-way valve 16, the P port is connected to the oil inlet end of the fifth shuttle valve 18, and the T port is disconnected. At this time, the linkage valve is in a down-drilling state; when the three-position five-way valve is in the lower position, its P' and A ports are connected, and the P and B ports are connected, so that the P' port is connected to the oil inlet end of the fifth shuttle valve 18, the P port is connected to the B port of the two-position four-way valve 16, and the T port is disconnected. At this time, the linkage valve is in an up-drilling state.

[0045] The brake valve disc 7 forms a hydraulically controlled two-position three-way valve 22 through a valve stem disposed inside the valve disc 7. The P port of the valve is connected to the oil inlets P1 and P2 through the second pressure reducing valve 8 disposed on the brake valve disc 7 and the internal oil passage, the A port is connected to the working port A3, and the T port is connected to the oil return port T1. The control end leads to a control port K2 on the brake valve disc 7, and is connected to the oil outlet end c1 of the first shuttle valve 10 through an external oil pipe, so as to realize the opening linkage of the brake when the motor is controlled to rotate by rotating the handle valve 1. The rated pressure of the second pressure reducing valve 8 is 7-8MPa.

[0046] During operation, connect the oil inlet P1 to the high-flow main pump of the directional drilling rig, the oil inlet P2 to the low-flow auxiliary pump of the directional drilling rig, the oil inlet P3 to the control output port of the main valve of the directional drilling rig, connect the working ports on the linkage valve group to the reserved interfaces of the corresponding actuators through oil pipes respectively, and connect the oil return ports T1, T2, and T3 to the oil tank respectively.

[0047] In the initial state, the three-position five-way valve 15 and the three-position four-way valve 17 are in the middle position, the two-position four-way valve 16 is in the lower position, the two-position four-way hydraulic control valve 19 and the two-position three-way hydraulic control valve 20 are in the upper position, the hydraulic control two-position three-way valve 22 is in the right position, and each handle is in the middle position. At this time, the oil entering from the oil inlets P1 and P2 is connected to the working ports B1 and A2 respectively through the two-position four-way hydraulic control valve 19 and the two-position three-way hydraulic control valve 20, so that the gripper and the chuck are in the clamped state; at the same time, the oil entering from the oil inlets P1 and P2 is disconnected from the working port A3, so that the brake is in the open state.

[0048] When linkage operation is required, manually control the two-position four-way valve 16 to be in the lower position and control the three-position four-way valve 17 to remain in the middle position. At this time, the linkage valve is in the linkage state. The following is an example of the linkage state:

[0049] 1. When rotary operation is required, the oil output from the control output port of the main valve of the directional drilling rig enters the main valve of the directional drilling rig for commutation from the oil inlet P3 through the rotary handle valve 1 from the oil outlet a or b. Another path of oil enters the control port K2 through the first shuttle valve 10 and the external oil pipe, and commutates the hydraulic control two-position three-way valve 22 to the left position; at the same time, the oil entering from the oil inlets P1 and P2 enters the working port A3 through the second pressure reducing valve 8 and the hydraulic control two-position three-way valve 22, so that the brake is opened.

[0050] 2. When pushing operation is required in the downhole drilling state, manually control the three-position five-way valve 15 to be in the upper position. The oil entering from the oil inlet P3 enters the main valve for commutation from the oil outlet b through the fast or slow handle valve 2. Another path of oil enters the three-position five-way valve 15 through the third shuttle valve 12, then enters the three-position four-way valve 17 through the three-position five-way valve 15 and the fifth shuttle valve 18, and reaches the control end of the two-position four-way hydraulic control valve 19 through the oil path of the three-position four-way valve 17, commutating the two-position four-way hydraulic control valve 19 to the lower position; at this time, the two-position three-way hydraulic control valve 20 is in the upper position. In this state, the oil entering from the oil inlets P1 and P2 enters the working port A1 through the two-position four-way hydraulic control valve 19 and the first pressure reducing valve 9, so that the gripper is opened; at the same time, another path of oil entering from the oil inlets P1 and P2 enters the working port A2 through the two-position three-way hydraulic control valve 20, so that the chuck is clamped.

[0051] 3. When it is necessary to perform a backward operation in the drill - lowering state, control the three - position five - way valve 15 to be in the upper position. The hydraulic fluid entering from the oil inlet P3 passes through the quick or slow handle valve 2 and enters the main valve from the oil outlet a for commutation. Another path of hydraulic fluid enters the three - position five - way valve 15 through the second shuttle valve 11, then reaches the control end of the two - position three - way hydraulic control valve 20 through the three - position five - way valve 15 and the two - position four - way valve 16, and commutates the two - position three - way hydraulic control valve 20 to the lower position; at this time, the two - position four - way hydraulic control valve 19 is in the upper position. In this state, the hydraulic fluid entering from the oil inlets P1 and P2 enters the working port B1 through the two - position four - way hydraulic control valve 19 to clamp the gripper; at the same time, the hydraulic fluid in the chuck enters the two - position three - way hydraulic control valve 20 through the working port A2, and then returns to the oil tank separately through the flow regulating valve 21 and the oil return port T2 to open the chuck. The opening speed of the chuck can be adjusted by the flow regulating valve 21.

[0052] 4. When it is necessary to perform a forward operation in the drill - raising state, control the three - position five - way valve 15 to be in the lower position. The hydraulic fluid entering from the oil inlet P3 passes through the quick or slow handle valve 2 and enters the main valve from the oil outlet b for commutation. Another part of the hydraulic fluid enters the three - position five - way valve 15 through the third shuttle valve 12, enters the control end of the two - position three - way hydraulic control valve 20 through the two - position four - way commutation valve, and commutates the two - position three - way hydraulic control valve 20 to the lower position. At this time, the two - position four - way hydraulic control valve 19 is in the upper position. In this state, the hydraulic fluid entering from the oil inlets P1 and P2 enters the working port B1 through the two - position four - way hydraulic control valve 19 to clamp the gripper; at the same time, the hydraulic fluid in the chuck enters the two - position three - way hydraulic control valve 20 through the working port A2, and then returns to the oil tank separately through the flow regulating valve 21 and the oil return port T2 to open the chuck.

[0053] 5. When it is necessary to perform a backward operation in the drill - raising state, control the three - position five - way valve 15 to be in the lower position. The hydraulic fluid entering from the oil inlet P3 passes through the quick or slow handle valve 2 and enters the main valve from the oil outlet a for commutation. Another part of the hydraulic fluid enters the three - position five - way valve 15 through the second shuttle valve 11, enters the control end of the two - position four - way hydraulic control valve 19 through the fifth shuttle valve 18 and the three - position four - way valve 17, and commutates the two - position four - way hydraulic control valve 19 to the lower position. At this time, the two - position three - way hydraulic control valve 20 is in the upper position. In this state, the hydraulic fluid entering from the oil inlets P1 and P2 enters the working port A1 through the two - position four - way hydraulic control valve 19 and the first pressure reducing valve 9 to open the gripper; another path of hydraulic fluid enters the working port A2 through the two - position three - way hydraulic control valve 20 to clamp the chuck.

[0054] 6. When it is necessary to operate the mud pump, the hydraulic fluid entering from the oil inlet P3 enters the mud pump truck through the mud pump handle valve 4 from the oil outlet a and the external oil pipe to control the operation of the mud pump.

[0055] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A directional drilling rig interlocking valve, including a pilot valve group, characterized in that: A linkage valve group is connected to one side of the pilot valve group. The linkage valve group includes an oil inlet valve plate, a linkage valve plate, and a brake valve plate that are connected in sequence. An oil inlet P1 and an oil return port T1 are provided on the oil inlet valve plate. Working ports A1, B1, and working port A2 are provided on the linkage valve plate and are used to connect to the gripper and the chuck respectively. A working port A3 is provided on the brake valve plate and is used to connect to the brake. The pilot valve group includes a rotary handle valve, a slow handle valve, and a fast handle valve that are connected in sequence. An oil inlet P3 is provided outside the rotary handle valve. A first shuttle valve is provided between a pair of oil outlet ports of the rotary handle valve. A second shuttle valve and a third shuttle valve are respectively provided between the oil outlet ports a and b of the slow handle valve and the fast handle valve. The linkage valve plate forms a manual three-position five-way valve, a two-position four-way valve, a three-position four-way valve, a two-position four-way hydraulic control valve, and a two-position three-way hydraulic control valve respectively through multiple valve rods inside. The P ports of the two-position four-way valve, the three-position four-way valve, the two-position four-way hydraulic control valve, and the two-position three-way hydraulic control valve are respectively communicated with the oil inlet P1. The A and B ports of the two-position four-way hydraulic control valve and the A port of the two-position three-way hydraulic control valve are respectively communicated with the working ports B1, A1, and working port A2 correspondingly. The control ends of the two-position four-way hydraulic control valve and the two-position three-way hydraulic control valve are respectively communicated with the A ports of the three-position four-way valve and the two-position four-way valve correspondingly. The two-position four-way valve is communicated with the B port of the three-position five-way valve. The A port of the three-position five-way valve is communicated with the B port of the three-position four-way valve through a fifth shuttle valve provided inside the linkage valve plate. The other oil inlet end of the fifth shuttle valve is communicated with a control port K3 provided on the brake valve plate and is communicated with an oil outlet port b of the rotary handle valve through an external oil pipe, so as to realize the automatic opening of the gripper when controlling the motor to rotate through the rotary handle valve. The P port and the P' port of the three-position five-way valve are respectively communicated with the oil outlet ends of the third shuttle valve and the second shuttle valve through internal oil channels, so as to realize the linkage of the gripper and the chuck when controlling the feed cylinder to act through the slow handle valve and the fast handle valve.

2. The linkage valve of a directional drill according to claim 1, wherein: The brake valve plate forms a hydraulic control two-position three-way valve through a valve rod provided inside it. The P port of this valve is communicated with the oil inlet P1 through a second pressure reducing valve provided on the brake valve plate. The A port is communicated with the working port A3. The T port is communicated with the oil return port T1. Its control end leads out a control port K2 on the brake valve plate and is communicated with the oil outlet end of the first shuttle valve through an external oil pipe, so as to realize the opening linkage of the brake when controlling the motor to rotate through the rotary handle valve.

3. The linkage valve of a directional drilling rig according to claim 1, characterized in that: The T ports of the three-position five-way valve, the two-position four-way valve, the three-position four-way valve, and the two-position four-way hydraulic control valve are respectively communicated with the oil return port T1 through internal oil channels. The T port of the two-position three-way hydraulic control valve is communicated with an oil return port T2 provided on the linkage valve plate through a flow regulating valve provided inside the linkage valve plate, so as to control the opening speed of the chuck.

4. The linkage valve of a directional drilling rig according to claim 1 or 3, characterized in that: at A first pressure reducing valve is provided between the B port of the two-position four-way hydraulic control valve and the working port A1 on the linkage valve plate to control the opening speed of the gripper.

5. The directional drilling rig linkage valve according to claim 1 or 3, characterized in that: When the two-position four-way valve is in the lower position, the control end of the two-position three-way hydraulic control valve is connected to the three-position five-way valve, and the oil inlet P1 is disconnected from the oil return port T1, so that the chuck is in a linkage state; when the valve is in the upper position, the oil inlet P1 is connected to the control end of the two-position three-way hydraulic control valve, so that the chuck is in a single-acting state.

6. The linkage valve of a directional drilling rig according to claim 5, characterized in that: When the three-position four-way valve is in the middle position, the control end of the two-position four-way hydraulic control valve is connected to the fifth shuttle valve, and the oil inlet P1 and the oil return port T1 are disconnected, so that the gripper is in a linkage state; when the valve is in the upper position, the oil inlet P1 is connected to the control end of the two-position four-way hydraulic control valve, and the oil return port T1 and the fifth shuttle valve are disconnected, so that the gripper is in a single-acting state and opens; when the valve is in the lower position, the control end of the two-position four-way hydraulic control valve is connected to the oil return port T1, and the oil inlet P1 is disconnected from the fifth shuttle valve, so that the gripper is in a single-acting state and clamps.

7. The linkage valve of a directional drilling rig according to claim 6, characterized in that: When the three-position five-way valve is in the middle position, the two-position four-way valve is connected to the oil return port T1, the P' port is disconnected, and the P port is connected to the fifth shuttle valve. At this time, the linkage valve is in a standby state; when the three-position five-way valve is in the upper position, the P' port is connected to the two-position four-way valve, the P port is connected to the fifth shuttle valve, and the T port is disconnected. At this time, the linkage valve is in the downhole drilling state; when the three-position five-way valve is in the lower position, the P' port is connected to the fifth shuttle valve, the P port is connected to the two-position four-way valve, and the T port is disconnected. At this time, the linkage valve is in the uphole drilling state.

8. The linkage valve of a directional drilling rig according to claim 1, characterized in that: The first shuttle valve is arranged on the valve block between the rotary handle valve and the slow handle valve, and the second shuttle valve and the third shuttle valve are arranged on the valve block between the slow handle valve and the fast handle valve; a fourth shuttle valve is arranged between a pair of oil outlet ports of the fast handle valve for connecting the control end of the oil inlet propulsion valve plate of the main valve.

9. The linkage valve of a directional drilling rig according to claim 1 or 8, characterized in that: at A mud pump handle valve is arranged between the fast handle valve and the oil inlet valve plate for connecting the mud pump truck; the fourth shuttle valve is arranged on the valve block between the fast handle valve and the mud pump handle valve.

10. A directional drilling rig linkage valve according to claim 1 or 6, characterized in that: at An oil inlet P2 parallel to the oil inlet P1 is arranged on the oil inlet valve plate. The oil inlets P1 and P2 are simultaneously connected to the oil inlet channel arranged in the oil inlet valve plate to make the control of the gripper and the chuck more stable; check valves are respectively arranged in the oil inlets P1 and P2 to avoid oil leakage when oil enters through a single oil inlet.

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