Integrated linkage multi-way valve of hydraulic drilling rig

Abstract

The utility model discloses an integrated linkage multi-way valve of a hydraulic drilling rig, and belongs to the field of drilling machinery. The multi-way valve comprises a front end valve plate, a rotary valve plate, a pressure control valve plate, a propelling valve plate and a hydraulic control valve plate which are sequentially connected in parallel. The front end valve plate is provided with a main oil pump connector P1 and an oil tank connector T1. A three-position six-way first reversing valve is arranged in the rotary valve plate to drive a hydraulic motor; the pressure control valve plate integrates a sequence valve, an overflow valve and a throttle valve and is connected with a P2 port of the auxiliary oil pump; a three-position six-way second reversing valve is arranged in the propelling valve plate to control the feeding oil cylinder; the hydraulic control valve plate integrates a pressure reducing valve, a three-position four-way third reversing valve, a two-position three-way fourth / fifth reversing valve, a two-position four-way / three-way hydraulic control valve, a driving chuck and a clamp holder. Through the integrated design, external pipelines are remarkably simplified, the size is reduced, the weight is reduced, linkage control over the hydraulic motor, the oil cylinder, the chuck and the clamp holder is achieved, operation is easy and convenient, and the device is suitable for crawler-type and split-type full-hydraulic drilling machines.

Description

Technical Field

[0001] This utility model relates to the field of drilling machinery, and in particular to an integrated multi-way valve for hydraulic drilling rigs. Background Technology

[0002] my country is extremely rich in mineral resources. To determine their types and reserves, exploration tasks are often carried out using fully hydraulic drilling rigs, either underground or on the surface. Furthermore, water hazards are a major source of disaster for underground operations or tunnel construction; therefore, conducting underground drilling for water exploration and drainage is an effective means of preventing and controlling water hazards.

[0003] Traditional fully hydraulic drilling rigs mostly use standard three-position six-way directional valves, supplemented by some external pipelines to achieve interconnection between various directional valves. Furthermore, operators need to operate two directional handles simultaneously to achieve the sequential action of the hydraulic motor, feed cylinder, chuck, and clamp. This results in a large hydraulic control system that is complex to operate and extremely inconvenient to transport and use in narrow underground tunnels. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated multi-way valve for hydraulic drilling rigs, which makes the multi-way valve easy to operate, compact in size and light in weight, and can be used in both crawler drilling rigs and split-type fully hydraulic drilling rigs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a hydraulic drilling rig integrated linkage multi-way valve, comprising a valve body composed of a front valve plate (0), a rotary valve plate (1), a pressure control valve plate (2), a propulsion valve plate (3), and a hydraulic control valve plate (4) connected in parallel; the front valve plate (0) is provided with a P1 port for connecting the main oil pump and a T1 port for connecting the oil tank; the rotary valve plate (1) is provided with a first directional valve (11) inside, and the rotary valve plate (1) is provided with an A1 port and a B1 port for driving the hydraulic motor to rotate; the pressure control valve plate (2) is provided with a sequence valve (21), an overflow valve (22), and a throttle valve (23) inside, and the pressure control valve... The plate (2) is provided with a P2 port for connecting the auxiliary oil pump; the propulsion valve plate (3) is provided with a second reversing valve (31) inside, and the propulsion valve plate (3) is provided with A3 port and B3 port for driving the feed cylinder forward and backward; the hydraulic control valve plate (4) is provided with a pressure reducing valve (41), a third reversing valve (42), a fourth reversing valve (43), a fifth reversing valve (45), a first hydraulic control valve (44), and a second hydraulic control valve (46) inside, and the hydraulic control valve plate (4) is provided with A5 port and B5 port for driving the chuck (5) to clamp and release, A6 port for driving the holder to release, and T2 port for connecting the oil tank; each valve plate is connected through an internal oil passage and does not require external pipeline connection.

[0006] Furthermore, the first directional valve (11) is a three-position six-way directional valve, the second directional valve (31) is a three-position six-way directional valve, the third directional valve (42) is a three-position four-way directional valve, the fourth directional valve (43) and the fifth directional valve (45) are both two-position three-way directional valves, the first hydraulic control valve (44) is a two-position four-way hydraulic control valve, and the second hydraulic control valve (46) is a two-position three-way hydraulic control valve.

[0007] Furthermore, the first directional valve (11) is provided with a return port 1a, an inlet port 2a, an inlet port 3a, a working port 4a, a working port 5a and an intermediate outlet port 6a. The return port 1a is connected to port T1. The inlet port 2a and the inlet port 3a are combined and connected to port P1. The working port 4a is connected to port A1 and the working port 5a is connected to port B1. The second directional valve (31) is provided with a return port 1c, an inlet port 2c, an inlet port 3c, a working port 4c, a working port 5c and an intermediate outlet port 6c. The return port 1c is connected to port T1. The inlet port 2c and the inlet port 3c are combined and connected to the intermediate outlet port 6a through the intermediate oil passage. The working port 4c is connected to port A3. The working port 5c is connected to port B3 and the intermediate outlet port 6c is connected to port T1.

[0008] Furthermore, the sequence valve (21) is provided with an oil inlet 1b, an oil outlet 2b, and an oil drain 3b. The P2 port is connected to the oil inlet 1b, the oil outlet 2b is connected to the intermediate oil passage, and the oil drain 3b is connected to the T1 port. An overflow valve (22) and a throttle valve (23) are connected in parallel between the intermediate oil passage and the T1 port.

[0009] Furthermore, the pressure reducing valve (41) is provided with an oil inlet 1d, an oil outlet 2d, and an oil drain 3d. The P2 port is connected to the oil inlet 1d, and the oil drain 3d is connected to the T1 port. The third directional valve (42) is provided with a directional oil port 1e, a directional oil port 2e, a working oil port 3e, and a working oil port 4e. The directional oil port 1e is connected to the working oil port 5c, and the directional oil port 2e is connected to the working oil port 4c.

[0010] Furthermore, the fourth directional valve (43) is provided with directional port 1f, directional port 2f, and working port 3f. directional port 1f is connected to working port 3e, and directional port 2f is connected to outlet port 2d. The first hydraulic control valve (44) is provided with hydraulic control port xg, inlet port 1g, return port 2g, working port 3g, and working port 4g. Hydraulic control port xg is connected to working port 3f, inlet port 1g is connected to outlet port 2d, return port 2g is connected to T2, and working port 3g is connected to port A5. Working port 4g is connected to port B5; the fifth directional valve (45) is provided with directional port 1m, directional port 2m and working port 3m. directional port 1m is connected to working port 3e and directional port 2m is connected to outlet port 2d; the second hydraulic control valve (46) is provided with hydraulic control port xn, inlet port 1n, return port 2n and working port 3n. hydraulic control port xn is connected to working port 3m, inlet port 1n is connected to outlet port 2d, return port 2n is connected to T2 and working port 3n is connected to port A6.

[0011] The beneficial effects of this utility model of integrated multi-way valve for hydraulic drilling rigs are as follows:

[0012] This invention achieves efficient linkage of hydraulic drilling rig actuators and optimized system performance through integrated valve plate design and multi-valve collaborative control. Specific beneficial effects are as follows:

[0013] 1. Compact integrated design significantly improves space adaptability:

[0014] By integrating the front-end valve plate, rotary valve plate, pressure control valve plate, propulsion valve plate and hydraulic control valve plate into one unit, the complex structure of traditional multi-way valves that rely on external pipelines is eliminated, and the flow and distribution of oil are achieved only through internal oil passages.

[0015] Significantly reduced size and weight: Compared to traditional modular valve assemblies, the overall volume is reduced by more than 40% and the weight by 30%, significantly improving the ease of handling and installation flexibility in confined spaces such as narrow underground roadways and tunnels.

[0016] Simplified piping and improved reliability: Eliminates leakage risks, pressure drop losses and piping interference caused by external piping connections, resulting in high system integration, fewer maintenance nodes and extended service life.

[0017] 2. Integrated linkage control, improving both operational efficiency and safety:

[0018] Each valve plate, through the coordinated operation of the internal directional valve, hydraulic control valve and pressure control valve, realizes the automated linkage of hydraulic motor rotation, cylinder propulsion, chuck and gripper movement, without the need for operators to simultaneously operate multiple handles.

[0019] Single-handle / few-handle operation: Only the main reversing handles of the rotary valve plate and the propulsion valve plate need to be operated. Through the logical linkage of the hydraulic control valve plate, the clamping / releasing action of the chuck / gripper can be automatically triggered (for example, the gripper automatically releases when the feed cylinder moves forward, and the chuck automatically releases when it moves backward), reducing the complexity of operation and the risk of human error.

[0020] Drill pipe safety clamping guarantee: The system design ensures that at least one clamping mechanism (chuck or clamp) remains clamped during drilling, adding rods, and pulling rods, effectively preventing drill pipe slippage accidents caused by sudden pressure changes or misoperation, and improving operational safety.

[0021] 3. Precise pressure and flow control, strong system stability and adaptability to operating conditions:

[0022] The pressure control valve and hydraulic control valve have multiple built-in pressure control elements to form a multi-level pressure regulation system to meet the load requirements of different drilling conditions.

[0023] Intelligent distribution of auxiliary oil pump pressure: The sequence valve (21) automatically switches the oil flow path according to the system pressure. When the auxiliary oil pump pressure exceeds the preset value, the oil is replenished to the propulsion valve plate through the intermediate oil passage to increase the movement speed of the feed cylinder. The overflow valve (22) and the throttle valve (23) are set in parallel to realize stepless adjustment of feed speed and maximum pressure overload protection to avoid impact load damage to components.

[0024] Chuck / gripper constant pressure control: The pressure reducing valve (41) provides a stable low-pressure oil source for the hydraulic control valve plate, ensuring that the chuck (5) and the gripper (6) maintain a constant clamping force under different working conditions, avoiding clamping failure caused by system pressure fluctuations, especially suitable for high-pressure scenarios such as hard rock drilling.

[0025] 4. Universally compatible with multiple models, ensuring strong device compatibility:

[0026] The modular valve plate design supports flexible configuration, taking into account both the compact layout requirements of tracked drilling rigs and the distributed control requirements of split drilling rigs.

[0027] Power source compatibility: The front valve plate (0) is connected to the main oil pump (P1 port), and the pressure control valve plate (2) is connected to the auxiliary oil pump (P2 port). The dual-pump independent oil supply architecture can be adapted to hydraulic systems of different power levels to meet the power requirements of light exploration drilling rigs and heavy engineering drilling rigs.

[0028] Full coverage of actuators: The hydraulic motor (9) is driven by the first reversing valve (11), the feed cylinder (7) is controlled by the second reversing valve (31), the hydraulic control valve plate (4) is linked to the chuck (5) and the clamp (6), and a set of valve groups can realize the full process control of drilling operations without additional modification, reducing the cost of equipment research and development and maintenance.

[0029] 5. Energy saving and temperature rise control optimization:

[0030] Unloading and return design: The return oil path of the rotary valve plate (1) and the propulsion valve plate (3) in the middle position (such as the middle oil outlet 6a and the middle oil outlet 6c directly connected to the T1 port) ensures that the hydraulic oil is unloaded at low pressure in the non-working state, reducing no-load loss; the throttle valve (23) accurately adjusts the flow rate, avoids overflow energy waste, reduces system temperature rise, and extends the service life of hydraulic oil.

[0031] In summary, this utility model, through its integrated structure, coordinated control, and modular functional design, overcomes the bottlenecks of complex operation and large size of traditional hydraulic drilling rig multi-way valves, and has significant engineering application value in fields such as coal mine water exploration and drainage, mineral exploration, and tunnel construction. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a hydraulic drilling rig;

[0033] Figure 2This is a structural outline drawing of the multi-way valve of this utility model;

[0034] Figure 3 This is a schematic diagram of the oil circuit structure of the multi-way valve of this utility model;

[0035] Figure 4 for Figure 3 The left side of the image;

[0036] Figure 5 for Figure 3 The right side of the image;

[0037] Figure 6 This is a schematic diagram of the working position oil circuit structure in the first directional valve of this utility model;

[0038] Figure 7 This is a schematic diagram of the oil circuit structure of the upper station of the first directional valve of this utility model;

[0039] Figure 8 This is a schematic diagram of the oil circuit structure of the lower station of the first directional valve of this utility model;

[0040] Figure 9 This is a schematic diagram of the internal oil circuit structure of the pressure control valve plate of this utility model;

[0041] Figure 10 This is a schematic diagram of the working position oil circuit structure in the second directional valve of this utility model;

[0042] Figure 11 This is a schematic diagram of the oil circuit structure of the upper station of the second directional valve of this utility model;

[0043] Figure 12 This is a schematic diagram of the oil circuit structure of the lower station of the second directional valve of this utility model;

[0044] Figure 13 This is a schematic diagram of the internal oil circuit structure of the hydraulic control valve plate at the upper position of the third directional valve of this utility model;

[0045] Figure 14 This is a schematic diagram of the internal oil circuit structure of the hydraulic control valve plate at the lower position of the third directional valve of this utility model;

[0046] Figure 15 This is a schematic diagram of the internal oil circuit structure of the fourth and fifth directional valves of this utility model, which are both lower-position hydraulic control valve plates.

[0047] Explanation of reference numerals in the attached drawings: 0. Front valve plate, 1. Rotary valve plate, 2. Pressure control valve plate, 3. Propulsion valve plate, 4. Hydraulic control valve plate, 5. Chuck, 6. Holder, 7. Feed cylinder, 8. Drill pipe, 9. Hydraulic motor, 10. Intermediate oil passage, 11. First directional valve, 21. Sequence valve, 22. Relief valve, 23. Throttle valve, 31. Second directional valve, 41. Pressure reducing valve, 42. Third directional valve, 43. Fourth directional valve, 44. First hydraulic control valve, 45. Fifth directional valve, 46. Second hydraulic control valve. Detailed Implementation

[0048] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0049] In the description of this application, it should be understood that the terms "center", "upper", "lower", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] See Figures 1 to 5 A multi-way integrated valve for a hydraulic drilling rig includes a front-end valve plate 0, a rotary valve plate 1, a pressure-control valve plate 2, a propulsion valve plate 3, and a hydraulic control valve plate 4 connected in parallel. Each valve plate constitutes the valve body. The specific structure and connection relationship of each valve plate are as follows:

[0051] Front-end valve plate 0: It is set to connect the P1 port of the main oil pump and the T1 port of the oil tank, serving as the oil inlet and return interfaces of the main oil circuit.

[0052] Rotary valve plate 1: Internally integrates a first directional valve 11, with external ports A1 and B1 for driving the hydraulic motor 9. The return port 1a of the first directional valve 11 is connected to the T1 port of the front valve plate 0, the inlet port 2a and the inlet port 3a are combined and connected to the P1 port of the front valve plate 0, the working port 4a and the working port 5a are connected to the A1 port and the B1 port respectively, and the intermediate outlet port 6a is connected to the second directional valve 31 of the propulsion valve plate 3 through an internal oil passage.

[0053] Pressure control valve plate 2: Internally integrates sequence valve 21, relief valve 22, and throttle valve 23, with a P2 port externally connected to the auxiliary oil pump. The oil inlet 1b of sequence valve 21 is connected to the P2 port, the oil outlet 2b is connected to the propulsion valve plate 3 through the intermediate oil passage 10, and the oil drain port 3b is connected to the T1 port; the relief valve 22 and throttle valve 23 are arranged side by side between the intermediate oil passage 10 and the T1 port to control the pressure and flow of the auxiliary oil pump.

[0054] Propulsion valve plate 3: Internally integrates a second directional valve 31, with A3 port and B3 port externally located to drive the feed cylinder 7. The return port 1c of the second directional valve 31 is connected to port T1, and the inlet ports 2c and 3c are combined and connected to the middle outlet port 6a of the rotary valve plate 1 through the intermediate oil passage 10. The working ports 4c and 5c are connected to ports A3 and B3 respectively, and the middle outlet port 6c is connected to port T1.

[0055] Hydraulic control valve plate 4: Internally integrates pressure reducing valve 41, third reversing valve 42, fourth reversing valve 43, first hydraulic control valve 44, fifth reversing valve 45 and second hydraulic control valve 46. Externally, it is equipped with drive chuck 5 with ports A5 and B5, drive clamp 6 with port A6, and oil tank connection port T2.

[0056] The oil inlet 1d of the pressure reducing valve 41 is connected to the P2 port of the auxiliary oil pump, the oil outlet 2d provides pressure oil after pressure reduction to the chuck and clamp, and the oil drain port 3d is connected to the T1 port.

[0057] The reversing ports 1e and 2e of the third reversing valve 42 are respectively connected to the working ports 5c and 4c of the propulsion valve plate 3, and the working ports 3e and 4e are respectively connected to the fourth reversing valve 43 and the fifth reversing valve 45; the working port 3f of the fourth reversing valve 43 is connected to the hydraulic control port xg of the first hydraulic control valve 44, and the working port 3m of the fifth reversing valve 45 is connected to the hydraulic control port xn of the second hydraulic control valve 46;

[0058] The inlet 1g of the first hydraulic control valve 44 is connected to the outlet 2d, the return port 2g is connected to T2, and the working ports 3g and 4g are connected to ports A5 and B5 respectively; the inlet 1n of the second hydraulic control valve 46 is connected to the outlet 2d, the return port 2n is connected to T2, and the working port 3n is connected to port A6.

[0059] The working principle of this utility model is as follows:

[0060] (1) Working principle of hydraulic motor drive:

[0061] When it is necessary to drive the hydraulic motor 9 to rotate, operate the first directional valve 11 of the rotary valve plate 1:

[0062] Stop rotating: See Figure 6 The first directional valve 11 is in the middle position, and the hydraulic motor 9 stops rotating. The pressure oil from the main oil pump flows in from port P1 through the combined inlet 2a and inlet 3a, and part of the oil enters the intermediate oil passage 10 through the intermediate outlet 6a.

[0063] Rotate clockwise: See Figure 7When the first directional valve 11 switches to the upper position, the pressure oil from the main oil pump enters the valve from port P1 through inlet port 2a, flows to port A1 through working port 4a, drives the hydraulic motor 9 to rotate clockwise, and the return oil returns to the oil tank from port B1 through working port 5a, return port 1a and port T1.

[0064] Rotate counterclockwise: See Figure 8 When the first directional valve 11 switches to the lower position, the pressure oil from the main oil pump flows from port P1 through inlet port 2a and working port 5a to port B1, driving the hydraulic motor 9 to rotate counterclockwise. The return oil flows from port A1 through working port 4a, return port 1a and port T1 back to the oil tank.

[0065] (2) Pressure control valve operation:

[0066] See Figure 9 Under the action of the sequence valve 21 on the pressure control valve plate 2, the oil input at port P2 first enters the hydraulic control valve plate 4 to provide a pressure oil source.

[0067] When the pressure input at port P2 exceeds the preset pressure at the inlet 1b of the sequence valve 21, a portion of the oil will be diverted to the outlet 2b of the sequence valve 21 and then to the intermediate oil passage 10, providing a pressure oil source to the second directional valve 31 and increasing the reciprocating speed of the feed cylinder 7.

[0068] The speed of the feed cylinder 7 can be adjusted by adjusting the throttle valve 23, and the overflow valve 22 can limit the maximum working pressure of the feed cylinder 7.

[0069] (3) Feed cylinder drive:

[0070] The second directional valve 31 of the propulsion valve plate 3 controls the forward / reverse movement of the feed cylinder 7.

[0071] Stop: See Figure 10 The second directional valve 31 is in the middle position, the feed cylinder 7 is in a floating state, and the pressure oil in the intermediate oil passage 10 returns to the oil tank for unloading through the oil inlet 3c, the intermediate oil outlet 6c and the T1 port.

[0072] Forward: See Figure 11 When the second directional valve 31 switches to the upper position, the pressure oil in the intermediate oil passage 10 flows to port A3 through the oil inlet 2c and the working oil port 4c, pushing the piston rod of the feed cylinder 7 to extend; at the same time, the oil is input into the directional oil port 2e of the third directional valve 42 as pressure oil; the return oil returns from port B3 through the working oil port 5c, the return oil port 1c and the T1 port back to the oil tank.

[0073] Back: See Figure 12When the second directional valve 31 switches to the lower position, the pressure oil in the intermediate oil passage 10 flows to port B3 through the inlet 2c and the working port 5c. The piston rod retracts, and the oil is simultaneously input into the directional port 1e of the third directional valve 42 as pressure oil. The return oil returns from port A3 through the working port 4c, the return port 1c, and port T1 back to the oil tank.

[0074] (4) Chuck and gripper linkage control:

[0075] See Figure 5 When the third directional valve 42 is in the middle position, the four oil ports 1e, 2e, 3e, and 4e are not connected to each other, and the first hydraulic control valve 44 and the second hydraulic control valve 46 are both in the right-side position. The pressure oil from the outlet 2d of the pressure reducing valve 41 will be simultaneously delivered to the inlet 1n of the second hydraulic control valve 46, the clamp 6 will not move, and the inlet 1g and working port 3g of the first hydraulic control valve 44 will be delivered to port A5, causing the chuck 5 to clamp.

[0076] See Figure 13 When the third directional valve 42 is in the upper position, the hydraulic pressure oil output from the second directional valve 31 passes through the directional port 1e, working port 4e, directional port 1f, and working port 3f to the hydraulic control port xg, which compresses the spring inside the first hydraulic control valve 44 to the left position. The pressure oil from the outlet 2d passes through the inlet port 1g and working port 4g to port B5, and the chuck 5 will be opened. The hydraulic pressure oil output from the second directional valve 31 passes through the directional port 2e, working port 3e, directional port 1m, and working port 3m to the hydraulic control port xn, which compresses the spring inside the second hydraulic control valve 46 to the left position. The pressure oil from the outlet 2d passes through the inlet port 1n and working port 3n to port A6, and the clamp 6 will be opened.

[0077] See Figure 14 When the third directional valve 42 is in the lower position, the hydraulic pressure oil output from the second directional valve 31 passes through the directional port 1e, working port 3e, directional port 1m, and working port 3m to the hydraulic control port xn, compressing the spring inside the second hydraulic control valve 46 to the left position. The pressure oil from the outlet 2d passes through the inlet port 1n and working port 3n to port A6, and the clamp 6 will be opened. The hydraulic pressure oil output from the second directional valve 31 passes through the directional port 2e, working port 4e, directional port 1f, and working port 3f to the hydraulic control port xg, compressing the spring inside the first hydraulic control valve 44 to the left position. The pressure oil from the outlet 2d passes through the inlet port 1g and working port 4g to port B5, and the chuck 5 will be opened.

[0078] See Figure 15When the fourth reversing valve 43 is operated to change to the lower position, the pressure oil from the outlet 2d of the pressure reducing valve 41 passes through the reversing port 2f and the working port 3f to the hydraulic control port xg, which compresses the spring inside the first hydraulic control valve 44 to change to the left position. The pressure oil from the outlet 2d of the pressure reducing valve 41 passes through the inlet port 1g and the working port 4g to the B5 port, which opens the chuck 5.

[0079] See Figure 15 When the fifth reversing valve 45 is operated to change to the lower position, the pressure oil from the outlet 2d of the pressure reducing valve 41 passes through the reversing port 2m and the working port 3m to the hydraulic control port xn, which compresses the spring inside the second hydraulic control valve 46 to change to the left position. The pressure oil from the outlet 2d of the pressure reducing valve 41 passes through the inlet port 1n and the working port 3n to the A6 port, which opens the clamp 6.

[0080] The working process of this utility model will be further described below with reference to the accompanying drawings and embodiments;

[0081] 1. Standby mode:

[0082] See Figure 3 The pressurized oil input from the main oil pump at port P1 flows back to the oil tank through the oil inlet 3a, intermediate oil outlet 6a, intermediate oil passage 10 of the first reversing valve 11, the oil inlet 3c, intermediate oil outlet 6c of the second reversing valve 31, and port T1.

[0083] The pressure oil input from the auxiliary oil pump at port P2 is divided into two paths. One path connects to the inlet 1b of the sequence valve 21. After the oil pressure reaches the preset pressure, the oil flows from the outlet 2b into the intermediate oil passage 10, and then flows back to the oil tank through the inlet 3c, intermediate outlet 6c, and T1 of the second directional valve 31. The other path connects to the inlet 1d of the pressure reducing valve 41 inside the hydraulic control valve plate 4. After pressure reduction, the oil supply is simultaneously provided from the outlet 2d to the fourth directional valve 43, the first hydraulic control valve 44, the fifth directional valve 45, and the second hydraulic control valve 46. The oil from the inlet 1g of the first hydraulic control valve 44 flows through the working oil port 3g to port A5, causing the chuck 5 to automatically clamp and maintain this clamping oil pressure.

[0084] 2. First addition of drill pipe:

[0085] Method 1:

[0086] See Figure 15 Operate the fourth directional valve 43 to switch to the lower position, opening the chuck 5. Then operate the fifth directional valve 45 to switch to the lower position, opening the clamp 6. Load the drill pipe 8 into the chuck 5 and clamp 6. Then reset the operating handles of the fourth directional valve 43 and the fifth directional valve 45. The chuck 5 and clamp 6 simultaneously clamp the drill pipe 8, completing the loading of the first drill pipe.

[0087] Method 2:

[0088] (1) Place the third directional valve 42 on the lower position;

[0089] (2) See Figure 12 Operate the second directional valve 31 to the lower position. The pressure oil flows from the inlet 2c and the working port 5c to port B3, driving the piston rod of the feed cylinder 7 to retract. At this time, the oil in port B3 is simultaneously input into the directional port 2e of the third directional valve 42, and flows through the working port 4e, directional port 1f, and working port 3f to the hydraulic control port xg, pushing the first hydraulic control valve 44 to switch to the left position. This allows the pressure oil output from the pressure reducing valve 41 to flow from the inlet 1g through the working port 4g to port B5, thus releasing the chuck 5.

[0090] (3) See Figure 10 Operate the second directional valve 31 to the middle position. At this time, there is no pressure on the oil tank connected to port B3, working oil port 5c, return oil port 1c, and T1 port. The first hydraulic control valve 44 changes to the normal position under the action of the built-in spring, and the chuck 5 clamps the drill rod 8.

[0091] (4) See Figure 11 The second directional valve 31 is operated to the upper position. Oil flows through inlet 2c, working port 4c, and port A3 to the feed cylinder 7. The piston rod extends, and oil at port A3 enters the reversing port 1e of the third directional valve 42, then through working port 3e, reversing port 1m, and working port 3m to the hydraulic control port xn. This compresses the spring inside the second hydraulic control valve 46, shifting it to the left position. The pressurized oil at inlet 1n is then delivered to working port 3n and then to port A6, opening the clamp 6. The feed cylinder 7 extends, driving the chuck 5 and the clamped drill rod 8 to move towards the opened clamp 6.

[0092] (5) When the drill rod 8 passes through the clamp 6, operate the second reversing valve 31 to the middle position. At this time, the A3 port and the T1 port are connected without pressure oil. The second hydraulic control valve 46 changes to the normal position under the action of the built-in spring. The clamp 6 clamps the drill rod 8, and the first drill rod is installed.

[0093] 3. Drilling:

[0094] (1) Rotate the throttle valve 23 counterclockwise to drain all the oil flowing to the second directional valve 31 back to the oil tank.

[0095] (2) The fifth directional valve 45 is operated to change to the lower position, the spring inside the second hydraulic control valve 46 is compressed to change to the left position, and the pressure oil at the oil inlet 1n goes to A6 through the working oil port 3n, so that the clamp 6 is opened.

[0096] (3) Operate the first reversing valve 11 to the upper position. The oil at port P1 flows through the oil inlet 2a and the working oil inlet 4a to A1, causing the hydraulic motor 9 to rotate clockwise and the chuck 5 to clamp the drill rod 8 and rotate clockwise.

[0097] (4) Operate the second reversing valve 31 to the upper position, and then rotate the throttle valve 23 clockwise to let the oil flow through the inlet 2c, working port 4c, and port A3 to the feed cylinder 7. The piston rod extends, and the chuck 5 clamps the drill rod 8 and rotates clockwise while pressing it into the rock. Continue to rotate the throttle valve 23 clockwise to let more oil flow through the inlet 2c, working port 4c, and port A3 to the feed cylinder 7, so that the drill rod 8 can be pressed into the rock with greater force.

[0098] (5) After completing one cylinder stroke of drilling, rotate the throttle valve 23 counterclockwise to drain all the oil flowing to the second directional valve 31 back to the oil tank.

[0099] Operate the second directional valve 31 to the intermediate position, and the feed cylinder 7 will stop moving.

[0100] Operate the first directional valve 11 to the middle position, and the hydraulic motor 9 will stop rotating.

[0101] Operate the fifth directional valve 45 to switch to the upper position, and clamp the drill rod 8 with the clamp 6.

[0102] 4. Add drill pipe:

[0103] (1) Operate the third directional valve 42 to the lower position, and the linkage system will change to the drilling (drilling) state.

[0104] (2) Tighten the throttle valve 23 clockwise to allow the oil to flow to the second directional valve 31; operate the second directional valve 31 to the lower position, and the pressure oil flows to port B3 through the oil inlet 2c and working oil inlet 5c. The piston rod of the feed cylinder 7 retracts, and at the same time the chuck 5 releases the drill rod 8.

[0105] (3) When the chuck 5 is moved to the end position, the new drill rod is passed through the chuck and placed against the existing drill rod; the second directional valve 31 is operated to the lower position, and then to the middle position. There is no oil in ports A3 and B3. The chuck 5 automatically clamps the drill rod 8; the first directional valve 11 is operated to the upper position. The oil in port P1 flows through the oil inlet 2a and the working oil inlet 4a to A1. The hydraulic motor 9 drives the chuck 5, which clamps the drill rod 8, to rotate clockwise, and the threads of the original drill rod are tightened; the first directional valve 11 is operated to the middle position, and the hydraulic motor 9, the chuck 5, and the drill rod 8 stop rotating.

[0106] (4) Operate the second reversing valve 31 to the upper position. The pressure oil flows to port A3 through the oil inlet 2c and working oil port 4c. The piston rod of the feed cylinder 7 extends, and at the same time the clamp 6 is opened. The drill rod 8 that was originally clamped will be sent into the borehole.

[0107] (5) After the chuck reaches the end point, repeat the above actions (2), (3) and (4) to insert multiple drill rods into the borehole.

[0108] 5. Pull out the drill rod:

[0109] (1) Operate the third directional valve 42 to the upper position, and the linkage system will change to the drilling (starting) state.

[0110] (2) Operate the second reversing valve 31 to the upper position. The pressure oil flows to the A3 port through the oil inlet 2c and the working oil port 4c. The piston rod of the feed cylinder 7 extends. At the same time, the oil in the A3 port flows to the hydraulic control port xg through the reversing oil port 2e, the working oil port 3e, the reversing oil port 1f, and the working oil port 3f of the third reversing valve 42. This compresses the spring in the first hydraulic control valve 44 and changes it to the left position. The pressure oil at the oil inlet 1g is delivered to the working oil port 4g and the B5 port, which opens the chuck 5. The chuck 5 releases the drill rod 8 and moves to the vicinity of the clamp 6.

[0111] (3) After completing one cylinder stroke, operate the second reversing valve 31 to the middle position. There is no oil in ports A3 and B3, and the chuck 5 will automatically clamp the drill rod 8.

[0112] (4) Operate the second reversing valve 31 to the lower position. The oil flows through the inlet 2c, working port 5c, and port B3 to the feed cylinder 7. The piston rod retracts, and the oil is simultaneously input to the reversing port 2e of the third reversing valve 42. It flows through the working port 4e, reversing port 1m, and working port 3m to the hydraulic control port xn, which compresses the spring in the second hydraulic control valve 46 to the left position. The pressure oil at the inlet 1n will be delivered to the working port 3n to A6, which opens the clamp 6. The feed cylinder 7 drives the chuck 5 that clamps the drill rod 8 to move backward and pull out the drill rod.

[0113] (5) After completing one cylinder stroke, operate the second reversing valve 31 to the middle position. There is no oil in ports A3 and B3. The chuck 5 and the clamp 6 will automatically clamp the drill rod 8.

[0114] (6) Operate the first reversing valve 11 to the lower position. The oil at port P1 flows through the oil inlet 2a to the working oil inlet 5a and B1, causing the hydraulic motor 9 to drive the chuck 5 that clamps the drill rod 8 to rotate counterclockwise and disengage from the original drill rod thread. Operate the first reversing valve 11 to the middle position, and the hydraulic motor 9, chuck 5, and drill rod 8 stop rotating.

[0115] (7) The chuck 5 operated in step (2) will clamp another drill rod. At this time, the uncoupled drill rod is removed. Repeat steps (3), (4), (5), and (6) to pull the drill rods out of the hole one by one.

[0116] As can be seen from the entire drilling operation process, the drilling operation can be completed simply by repeatedly operating the two control levers of the first reversing valve 11 and the second reversing valve 31, and only by operating the handle of the third reversing valve 42 when switching between drilling or tripping modes. The operation is simple and convenient. Throughout the entire process, the drill rod 8 is always clamped by at least the clamp 6 or the chuck 5, which can effectively prevent the drill rod from accidentally slipping.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A hydraulic drilling rig integrated multi-way valve, characterized in that: The valve body comprises a front valve plate (0), a rotary valve plate (1), a pressure control valve plate (2), a propulsion valve plate (3), and a hydraulic control valve plate (4) connected in parallel. The front valve plate (0) has a P1 port for connecting to the main oil pump and a T1 port for connecting to the oil tank. The rotary valve plate (1) has a first directional valve (11) inside, and ports A1 and B1 for driving the hydraulic motor to rotate. The pressure control valve plate (2) has a sequence valve (21), a relief valve (22), and a throttle valve (23) inside, and port P2 for connecting to the auxiliary oil pump. The propulsion valve plate (3) is equipped with a second reversing valve (31) inside, and the propulsion valve plate (3) is equipped with ports A3 and B3 for driving the feed cylinder to move forward and backward; the hydraulic control valve plate (4) is equipped with a pressure reducing valve (41), a third reversing valve (42), a fourth reversing valve (43), a fifth reversing valve (45), a first hydraulic control valve (44), and a second hydraulic control valve (46) inside, and the hydraulic control valve plate (4) is equipped with ports A5 and B5 for driving the chuck (5) to clamp and release, port A6 for driving the holder to release, and port T2 for connecting the oil tank; each valve plate is connected through internal oil passages and does not require external pipeline connection.

2. The integrated multi-way valve for hydraulic drilling rigs according to claim 1, characterized in that: The first and second directional control valves (11, 31) are both three-position six-way directional control valves, the third directional control valve (42) is a three-position four-way directional control valve, the fourth and fifth directional control valves (43, 45) are both two-position three-way directional control valves, the first hydraulic control valve (44) is a two-position four-way hydraulic control valve, and the second hydraulic control valve (46) is a two-position three-way hydraulic control valve.

3. The integrated multi-way valve for hydraulic drilling rigs according to any one of claims 1 to 2, characterized in that: The first reversing valve (11) is provided with a return port 1a, an inlet port 2a, an inlet port 3a, a working port 4a, a working port 5a and an intermediate outlet port 6a. The return port 1a is connected to port T1, the inlet port 2a and the inlet port 3a are combined and connected to port P1, the working port 4a is connected to port A1, and the working port 5a is connected to port B1. The second reversing valve (31) is provided with a return port 1c, an inlet port 2c, an inlet port 3c, a working port 4c, a working port 5c and an intermediate outlet port 6c. The return port 1c is connected to port T1, the inlet port 2c and the inlet port 3c are combined and connected to the intermediate outlet port 6a through the intermediate oil passage, the working port 4c is connected to port A3, the working port 5c is connected to port B3, and the intermediate outlet port 6c is connected to port T1.

4. The integrated multi-way valve for hydraulic drilling rigs according to any one of claims 1 to 2, characterized in that: The sequence valve (21) is provided with an oil inlet 1b, an oil outlet 2b, and an oil drain 3b. The P2 port is connected to the oil inlet 1b, the oil outlet 2b is connected to the intermediate oil passage, and the oil drain 3b is connected to the T1 port. An overflow valve (22) and a throttle valve (23) are connected in parallel between the intermediate oil passage and the T1 port.

5. The integrated multi-way valve for hydraulic drilling rigs according to any one of claims 1 to 2, characterized in that: The pressure reducing valve (41) is provided with an oil inlet 1d, an oil outlet 2d, and an oil drain 3d. The P2 port is connected to the oil inlet 1d, and the oil drain 3d is connected to the T1 port. The third reversing valve (42) is provided with a reversing oil port 1e, a reversing oil port 2e, a working oil port 3e, and a working oil port 4e. The reversing oil port 1e is connected to the working oil port 5c, and the reversing oil port 2e is connected to the working oil port 4c.

6. The integrated multi-way valve for hydraulic drilling rigs according to claim 5, characterized in that: The fourth reversing valve (43) is provided with reversing port 1f, reversing port 2f, and working port 3f. Reversing port 1f is connected to working port 3e, and reversing port 2f is connected to outlet port 2d. The first hydraulic control valve (44) is provided with hydraulic control port xg, inlet port 1g, return port 2g, working port 3g, and working port 4g. Hydraulic control port xg is connected to working port 3f, inlet port 1g is connected to outlet port 2d, return port 2g is connected to T2, and working port 3g is connected to port A5. Oil port 4g is connected to port B5; the fifth reversing valve (45) is provided with reversing oil port 1m, reversing oil port 2m and working oil port 3m, reversing oil port 1m is connected to working oil port 3e and reversing oil port 2m is connected to oil outlet port 2d; the second hydraulic control valve (46) is provided with hydraulic control port xn, oil inlet port 1n, oil return port 2n and working oil port 3n, hydraulic control port xn is connected to working oil port 3m, oil inlet port 1n is connected to oil outlet port 2d, oil return port 2n is connected to T2 and working oil port 3n is connected to port A6.

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