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] This utility model relates to a hydraulic valve, and more particularly to a linkage valve for a directional drilling rig. Background Technology

[0002] Directional drilling rigs are pipeline construction tools used in the engineering industry, primarily for oil, natural gas, and some municipal pipeline projects. Large directional drilling rigs are used for positioning drilling, hole reaming, hole cleaning, and pipeline pullback before pipeline construction. During operation, the operator needs to remotely control the machine from outside, making it crucial to ensure the stable and sensitive operation of the directional drilling rig.

[0003] When a directional drilling rig is in operation, the working status of the directional drilling rig valve assembly needs to be adjusted according to the working conditions, and the valve assembly is required to respond quickly to this. The existing directional drilling rig valve assembly has the following problems:

[0004] 1. Drilling and braking cannot be fully coordinated, and the work steps are numerous, which can easily lead to human error.

[0005] 2. It cannot control the chuck and gripper separately, lacks flexibility, and is difficult to adapt to the needs of different working conditions.

[0006] 3. The logical relationships are complex, the installation location requires a large space, there are many external pipelines, making it inconvenient to find problems and repair or replace parts, and it also requires a high level of skill from the workers. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a directional drilling rig linkage valve that is easy to operate, can realize the linkage operation of drilling and braking, and can independently control the chuck and clamp.

[0008] The technical solution of this utility model is as follows:

[0009] A linkage valve for a directional drilling rig includes a pilot valve assembly, characterized in that a linkage valve assembly is connected to one side of the pilot valve assembly. This linkage valve assembly includes an inlet valve plate, a linkage valve plate, and a brake valve plate connected in sequence. The inlet valve plate has an inlet port P1 and a return port T1, while the linkage valve plate has working ports A1, B1, and A2, used for connecting a clamp and a chuck, respectively. The brake valve plate has a working port A3 for connecting a 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 on the outside of the rotary handle valve. A first shuttle valve is provided between a pair of oil outlets of the rotary handle valve. A second shuttle valve and a third shuttle valve are provided between oil outlet a and oil outlet b of the slow handle valve and the fast handle valve, respectively.

[0011] The linkage valve plate, through multiple internal valve stems, 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. The P port 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 port 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 A2. The two-position four-way hydraulic control valve and the two-position three-way... The control end of the hydraulic valve is connected to the corresponding port A of the three-position four-way valve and the two-position four-way valve. The two-position four-way valve is connected to the port B of the three-position five-way valve. The port A of the three-position five-way valve is connected to the port B of the three-position four-way valve through the fifth shuttle valve located in the linkage valve plate. The other oil inlet of the fifth shuttle valve is connected to the control port K3 located on the brake valve plate and is connected to one oil outlet b of the rotary handle valve through an external oil pipe. This is used to realize the automatic opening of the clamp when the motor is controlled to rotate by 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 of the third shuttle valve and the second shuttle valve through internal oil passages, and are used to realize the linkage between the clamp and the chuck when the feed cylinder is controlled by the slow handle valve and the fast handle valve.

[0013] As a further preferred embodiment, the brake valve plate forms a hydraulically controlled two-position three-way valve through a valve stem located inside it. The P port of this valve is connected to the oil inlet P1 through a second pressure reducing valve located on the brake valve plate, the A port is connected to the working port A3, and the T port is connected to the return port T1. Its control end is led out at the control port K2 of the brake valve plate and is connected to the oil outlet of the first shuttle valve through an external oil pipe. This is used to realize the opening and closing linkage of the brake when the motor is controlled to rotate by rotating the handle valve.

[0014] As a further preferred embodiment, 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 return oil port T1 through internal oil passages, and the T port of the two-position three-way hydraulic control valve is connected to the return oil port T2 on the linkage valve plate through a flow regulating valve located inside the linkage valve plate, for controlling the opening speed of the chuck.

[0015] As a further preferred embodiment, a first pressure reducing valve is provided on the linkage valve plate between port B of the two-position four-way hydraulic control valve and the working port A1, for controlling the opening speed of the clamp.

[0016] As a further preferred embodiment, 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 linked 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-action state.

[0017] As a further preferred embodiment, 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 clamp is in a linked 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 clamp is in a single-action state and is open; 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 and the fifth shuttle valve are disconnected, so that the clamp is in a single-action state and is clamped.

[0018] As a further preferred embodiment, when the three-position five-way valve is in the middle position, the two-position four-way valve is connected to the 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 standby mode. 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 drilling down 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 drilling up state.

[0019] As a further preferred embodiment, the first shuttle valve is located on the valve block between the rotary handle valve and the slow handle valve, and the second and third shuttle valves are located on the valve block between the slow handle valve and the fast handle valve; a fourth shuttle valve is provided between a pair of oil outlets of the fast handle valve for connecting to the control end of the oil inlet propulsion valve plate of the main valve.

[0020] As a further preferred embodiment, a mud pump handle valve is provided between the quick handle valve and the oil inlet valve plate for connecting the mud pump truck; the fourth shuttle valve is located on the valve block between the quick handle valve and the mud pump handle valve.

[0021] As a further preferred option, an oil inlet P2 is provided on the oil inlet valve plate, which is arranged parallel to the oil inlet P1. The oil inlets P1 and P2 are simultaneously connected to the oil inlet channel provided in the oil inlet valve plate, so as to achieve more stable control of the clamp and chuck. One-way valves are provided in the oil inlets P1 and P2 respectively to avoid oil leakage when oil is introduced through a single oil inlet.

[0022] The beneficial effects of this utility model are:

[0023] 1. Because the pilot valve group of this linkage valve is connected to the control terminals of the two-position four-way hydraulic control valve and the two-position three-way hydraulic control valve that are respectively connected to the clamp and the chuck through the three-position five-way valve, two-position four-way valve and three-position four-way valve in the linkage valve plate, the linkage of the clamp and the chuck is realized by controlling the pilot valve group to control the motor rotation or the cylinder extension and retraction. It has the capability of full linkage operation, is easy to operate, simplifies the workflow, reduces operation steps, significantly improves the system response speed, and reduces the risk of human error.

[0024] 2. Since both the two-position four-way valve and the three-position four-way valve are manual valves and the P port is connected to the oil inlet P1 respectively, the linkage valve has a single-action function while realizing linkage. It can control the chuck and the gripper separately and supports free switching, so that it can 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 suitable for most working environments. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 yes Figure 1 Top view.

[0028] Figure 3 yes Figure 1 The left view.

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

[0030] In the diagram: 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 Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0032] like Figures 1-4 As shown, the present invention relates to a linkage valve for a directional drilling rig, comprising a pilot valve assembly. A linkage valve assembly is fixedly connected to the right side of the pilot valve assembly. The pilot valve assembly 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 on the outside of the rotary handle valve 1. The oil inlet P3 and the oil return port T3 are respectively connected to the P port and T port of each handle valve.

[0033] The rotary handle valve 1 has a pair of outlet ports a and b for connecting to the rotary valve plate of the main valve of the directional drilling rig, thereby controlling the forward and reverse rotation of the directional drilling rig motor. A first shuttle valve 10 is provided between the pair of outlet ports a and b of the rotary handle valve 1, and the first shuttle valve 10 is located on the valve block between the rotary handle valve 1 and the slow handle valve 2. A second shuttle valve 11 and a third shuttle valve 12 are provided between outlet port a and outlet port b of the slow handle valve 2 and the fast handle valve 3, respectively. The second shuttle valve 11 and the third shuttle valve 12 are located on the valve block between the slow handle valve 2 and the fast handle valve 3. A fourth shuttle valve 13 is provided between the pair of outlet ports a and b of the fast handle valve 3.

[0034] The pair of oil outlets a and b of the slow-speed handle valve 2 are used to connect to the attitude adjustment valve of the directional drilling rig to control the slow advance of the feed cylinder; the pair of oil outlets a and b of the fast-speed handle valve 3 are used to connect to the fast advance valve plate of the main valve of the directional drilling rig to control the fast advance of the feed cylinder. The oil outlet a of the mud pump handle valve 4 is used to connect to the mud pump truck, and the oil outlet b is blocked; the fourth shuttle valve 13 is located on the valve block between the fast-speed handle valve 3 and the mud pump handle valve 4, and the oil outlet c2 of the fourth shuttle valve 13 is led out from the valve block to connect to the control end of the oil inlet advance valve plate of the main valve of the directional drilling rig.

[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. The oil inlet valve plate 5 is provided with an oil inlet port P1 and an oil return port T1. The linkage valve plate 6 is provided with a working port A1, a working port B1, and a working port A2, which are used to connect the clamp and the chuck, respectively. The brake valve plate 7 is provided with a working port A3, which is used to connect the brake.

[0036] An oil inlet P2 is provided on the oil inlet valve plate 5, which is arranged parallel to the oil inlet P1. The oil inlets P1 and P2 are connected to the oil inlet channel provided in the oil inlet valve plate 5. A one-way valve 14 is installed in the oil inlets P1 and P2 respectively to avoid oil leakage when oil is introduced through a single oil inlet.

[0037] The linkage valve plate 6, through multiple internal valve stems, forms a manual three-position five-way valve 15, a two-position four-way valve 16, a three-position four-way valve 17, a two-position four-way hydraulic control valve 19, and a two-position three-way hydraulic control valve 20. The P ports of the two-position four-way valve 16, the three-position four-way valve 17, the two-position four-way hydraulic control valve 19, and the two-position three-way hydraulic control valve 20 are respectively connected to the oil inlet ports P1 and P2 via internal oil passages. The A and B ports of the two-position four-way hydraulic control valve 19 are respectively connected to the working ports B1 and A1 via internal oil passages. The A port of the two-position three-way hydraulic control valve 20 is connected to the working port A2. The control terminals of the two-position four-way hydraulic control valve 19 and the two-position three-way hydraulic control valve 20 are respectively... The A ports of the three-position four-way valve 17 and the two-position four-way valve 16 are connected one-to-one. The two-position four-way valve 16 is connected to the B port of the three-position five-way valve 15. The A port of the three-position five-way valve 15 is connected to the B port of the three-position four-way valve 17 through the fifth shuttle valve 18 located in the linkage valve plate 6. The other oil inlet end of the fifth shuttle valve 18 is connected to the control port K3 located on the brake valve plate 7 and is connected to one oil outlet b of the rotary handle valve 1 through the oil pipe connected to the control port K3. This is used to realize the automatic opening of the clamp when the motor is controlled to rotate by the rotary handle valve 1, and to realize the linkage between the clamp and the chuck when the drilling rig is controlled to go down and up by the three-position five-way valve 15.

[0038] The P port and P' port of the three-position five-way valve 15 are respectively connected to the oil outlet of the third shuttle valve 12 and the second shuttle valve 11 through internal oil passages, and are used to realize the linkage between the clamp and the chuck when the feed cylinder is controlled by the slow handle valve 2 and the fast handle valve 3.

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

[0040] A first pressure reducing valve 9 is provided on the linkage valve plate 6 between port B of the two-position four-way hydraulic control valve 19 and the working port A1. Its rated pressure is 13-14 MPa and it is used to control the opening speed of the clamp.

[0041] When the two-position four-way hydraulic control valve 19 is in the upper position, its P port is connected to its A port and its B port is connected to its T port; when it is in the lower position, its P port is connected to its B port and its A port is connected to its T port. When the two-position three-way hydraulic control valve 20 is in the upper position, its P port is connected to its A port and its T port is closed; when it is in the lower position, its A port is connected to its T port and its P port is closed.

[0042] When the two-position four-way valve 16 is in the lower position, its A and B ports are open, and its P and T ports are closed, so that the control end of the two-position three-way hydraulic control valve 20 is connected to the three-position five-way valve 15, and the oil inlet ports P1 and P2 are disconnected from the oil return port T1, so that the chuck is in a linked state; when the valve is in the upper position, its P and A ports are open, and its B and T ports are closed, so that the oil inlet ports P1 and P2 are connected to 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 open, and its P and T ports are closed, connecting the control end of the two-position four-way hydraulic control valve 19 with the oil outlet end of the fifth shuttle valve 18, and disconnecting the oil inlet P1 and the oil return port T1, so that the clamp is in a linked state; when the valve is in the upper position, its P and A ports are open, and its B and T ports are closed, connecting the oil inlet P1 with the control end of the two-position four-way hydraulic control valve 19, and disconnecting the oil return port T1 and the fifth shuttle valve 18, so that the clamp is in a single-action state and is open; when the valve is in the lower position, its A and T ports are open, and its P and B ports are closed, connecting the control end of the two-position four-way hydraulic control valve 19 with the oil return port T1, and disconnecting the oil inlet P1 and the fifth shuttle valve 18, so that the clamp is in a single-action state and is clamped.

[0044] When the three-position five-way valve 15 is in the middle position, its P and A ports are open, its B and T ports are open, and its P' port is closed, 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 closed, and the P port is connected to the fifth shuttle valve 18. At this time, the linkage valve is in standby mode. When the three-position five-way valve 15 is in the upper position, its P' and B ports are open, and its P and A ports are open, 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 closed. At this time, the linkage valve is in the drilling state. When the three-position five-way valve is in the lower position, its P' and A ports are open, and its P and B ports are open, 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 closed. At this time, the linkage valve is in the drilling state.

[0045] The brake valve plate 7 forms a hydraulically controlled two-position three-way valve 22 via a valve stem located inside it. The P port of this valve is connected to the oil inlets P1 and P2 via a second pressure-reducing valve 8 located on the brake valve plate 7 and an internal oil passage; the A port is connected to the working port A3; and the T port is connected to the return port T1. Its control end is led out to a control port K2 on the brake valve plate 7 and connected to the oil outlet c1 of the first shuttle valve 10 via an external oil pipe. This is used to achieve the brake opening linkage when the motor is rotated by rotating the handle valve 1. The rated pressure of the second pressure-reducing valve 8 is 7-8 MPa.

[0046] During operation, connect oil inlet P1 to the high-flow main pump of the directional drilling rig, oil inlet P2 to the low-flow auxiliary pump of the directional drilling rig, 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, and connect oil return ports T1, T2, and T3 to the oil tank.

[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 all handles are in the middle position. At this time, the oil entering from the inlet ports P1 and P2 is connected to the working port B1 and the working port 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 clamp and chuck are in the clamped state; at the same time, the oil entering from the inlet ports P1 and P2 is disconnected from the working port A3, so that the brake is in the open state.

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

[0049] 1. When rotation is required, the oil output from the control output port of the directional drilling rig main valve enters the directional drilling rig main valve from the oil inlet P3 through the rotary handle valve 1 from the oil outlet a or b for reversal. Another oil path enters the control port K2 through the first shuttle valve 10 and the external oil pipe, switching the hydraulic 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 two-position three-way valve 22, causing the brake to open.

[0050] 2. When propulsion is required during drilling, manually control the three-position five-way valve 15 to the upper position. Oil entering from inlet P3 flows through the fast or slow handle valve 2 from outlet b into the main valve for reversal. Another path of oil flows through the third shuttle valve 12 into the three-position five-way valve 15, then through the three-position five-way valve 15 and the fifth shuttle valve 18 into the three-position four-way valve 17. The oil path through the three-position four-way valve 17 reaches the control end of the two-position four-way hydraulic control valve 19, reversing it to the lower position. At this time, the two-position three-way hydraulic control valve 20 is in the upper position. In this state, oil entering from inlets P1 and P2 flows through the two-position four-way hydraulic control valve 19 and the first pressure reducing valve 9 into the working port A1, opening the clamp. Simultaneously, another path of oil entering from inlets P1 and P2 flows through the two-position three-way hydraulic control valve 20 into the working port A2, clamping the chuck.

[0051] 3. When retraction is required during drilling, the three-position five-way valve 15 is controlled to the upper position. The oil entering from the inlet P3 enters the main valve through the fast or slow handle valve 2 from the outlet a for reversal. Another oil path enters the three-position five-way valve 15 through the second shuttle valve 11, and 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, reversing 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 oil entering from the inlets P1 and P2 enters the working port B1 through the two-position four-way hydraulic control valve 19, clamping the chuck. At the same time, the oil 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 return port T2, opening the chuck. The opening speed of the chuck can be adjusted by the flow regulating valve 21.

[0052] 4. When drilling is in the start-up state and propulsion is required, control the three-position five-way valve 15 to the lower position. The oil entering from the inlet P3 enters the main valve through the fast or slow handle valve 2 from the outlet b for reversal. Another part of the oil enters the three-position five-way valve 15 through the third shuttle valve 12, and then enters the control end of the two-position three-way hydraulic control valve 20 through the two-position four-way reversing valve, reversing 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 oil entering from the inlets P1 and P2 enters the working port B1 through the two-position four-way hydraulic control valve 19, causing the clamp to clamp; at the same time, the oil 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 return port T2, causing the chuck to open.

[0053] 5. When retraction is required during the tripping operation, the three-position five-way valve 15 is controlled to the lower position. Oil entering from inlet P3 flows through the fast or slow handle valve 2 from outlet a into the main valve for reversal. Another portion of the oil flows through the second shuttle valve 11 into the three-position five-way valve 15, then through the fifth shuttle valve 18 and the three-position four-way valve 17 to the control end of the two-position four-way hydraulic control valve 19, reversing it to the lower position. At this time, the two-position three-way hydraulic control valve 20 is in the upper position. In this state, oil entering from inlets P1 and P2 flows through the two-position four-way hydraulic control valve 19 and the first pressure reducing valve 9 into working port A1, opening the chuck; another path of oil flows through the two-position three-way hydraulic control valve 20 into working port A2, clamping the chuck.

[0054] 6. When the mud pump needs to be operated, the oil entering from the inlet P3 enters the mud pump truck through the mud pump handle valve 4 from the outlet a and the external oil pipe, controlling the operation of the mud pump.

[0055] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A linkage valve for a directional drilling rig, comprising a pilot valve assembly, 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 connected in sequence. The oil inlet valve plate is provided with an oil inlet port P1 and an oil return port T1. The linkage valve plate is provided with working ports A1, B1, and A2, which are used to connect the clamp and the chuck, respectively. The brake valve plate is provided with a working port A3, which is used to connect the brake. 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 on the outside of the rotary handle valve. A first shuttle valve is provided between a pair of oil outlets of the rotary handle valve. A second shuttle valve and a third shuttle valve are provided between oil outlet a and oil outlet b of the slow handle valve and the fast handle valve, respectively. The linkage valve plate, through multiple internal valve stems, 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. The P port 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 port 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 A2. The two-position four-way hydraulic control valve and the two-position three-way... The control end of the hydraulic valve is connected to the corresponding port A of the three-position four-way valve and the two-position four-way valve. The two-position four-way valve is connected to the port B of the three-position five-way valve. The port A of the three-position five-way valve is connected to the port B of the three-position four-way valve through the fifth shuttle valve located in the linkage valve plate. The other oil inlet of the fifth shuttle valve is connected to the control port K3 located on the brake valve plate and is connected to one oil outlet b of the rotary handle valve through an external oil pipe. This is used to realize the automatic opening of the clamp when the motor is controlled to rotate by the rotary handle valve. The P port and P' port of the three-position five-way valve are respectively connected to the oil outlet of the third shuttle valve and the second shuttle valve through internal oil passages, and are used to realize the linkage between the clamp and the chuck when the feed cylinder is controlled by the slow handle valve and the fast handle valve.

2. The directional drilling rig linkage valve according to claim 1, characterized in that: The brake valve plate forms a hydraulically controlled two-position three-way valve through a valve stem located inside it. The P port of the valve is connected to the oil inlet P1 through a second pressure reducing valve located on the brake valve plate, the A port is connected to the working port A3, and the T port is connected to the return port T1. Its control end is led out at the control port K2 of the brake valve plate and is connected to the oil outlet of the first shuttle valve through an external oil pipe. It is used to realize the opening and closing linkage of the brake when the motor is controlled to rotate by rotating the handle valve.

3. The directional drilling rig linkage valve 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 connected to the return oil port T1 through internal oil passages. The T port of the two-position three-way hydraulic control valve is connected to the return oil port T2 on the linkage valve plate through a flow regulating valve located inside the linkage valve plate, which is used to control the opening speed of the chuck.

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

5. A 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 terminal 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 linked state; when the valve is in the upper position, the oil inlet P1 is connected to the control terminal of the two-position three-way hydraulic control valve, so that the chuck is in a single-action state.

6. A directional drilling rig linkage valve 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 clamp is in the 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 clamp is in the single-action state and is open; 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 and the fifth shuttle valve are disconnected, so that the clamp is in the single-action state and is clamped.

7. A directional drilling rig linkage valve 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 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 standby mode. 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 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 drilling state.

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

9. A directional drilling rig linkage valve according to claim 8, characterized in that: in A mud pump handle valve is provided between the quick handle valve and the oil inlet valve plate for connecting the mud pump truck; the fourth shuttle valve is located on the valve block between the quick handle valve and the mud pump handle valve.

10. A directional drilling rig linkage valve according to claim 1 or 6, characterized in that: in The oil inlet valve plate is provided with an oil inlet P2 arranged parallel to the oil inlet P1. The oil inlets P1 and P2 are connected to the oil inlet channel provided in the oil inlet valve plate to achieve more stable control of the clamp and chuck. One-way valves are provided in the oil inlets P1 and P2 respectively to avoid oil leakage when oil is introduced through a single oil inlet.

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