A mine drilling machine top hole construction anti-slip rod device and a use method thereof

Abstract

The present application relates to a kind of mine drilling machine top hole construction anti-slip rod device and its use method, belong to drilling machine technical field;Device includes chuck, holder, three-position four-way directional valve, sequence valve and check valve;Three-position four-way directional valve middle, chuck and holder are all clamped state, form safety stop position;Sequence valve is connected in series on the holder oil circuit and parallel check valve, so that the holder needs to overcome the set pressure of sequence valve to be opened, ensure that chuck is prior to holder to establish enough clamping force;It also includes three-position five-way directional valve controlled by mode signal, realizes intelligent linkage with drilling machine tripping;Using method is by controlling the state of each directional valve, in initial, drilling feed, tripping pullout and other key conditions, forcibly realize double-clamping transition and timing control;The present application completely solves the problem of rod slip caused by pressure drop when chuck and holder state switches during drilling machine top hole construction, significantly improves the safety and reliability of large inclination drilling operation.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, specifically to a device for preventing slippage during top hole construction in mining drilling rigs and its usage method. Background Technology

[0002] Mining drilling rigs, especially tunnel drilling rigs for coal mines, are mainly used for drilling operations in underground coal mines for gas drainage, water exploration, and geological exploration. In certain specific construction environments, long-distance drilling operations with large elevation angles or even vertical top holes are required. During this process, as the drilling depth increases, the weight of the drill rod itself generates significant gravitational potential energy. This necessitates enhanced structural reliability and clamping force for the drill rod clamping mechanism to ensure that the drill rod does not slip downwards due to inability to hold it properly during construction.

[0003] In coal mine tunnel drilling rigs, drill rods are typically held in a combination of a power head chuck and a clamping device. A chuck is installed on the output shaft of the power head that drives the drill rod's rotation, used to clamp the drill rod for drilling operations. Simultaneously, a clamping device is installed at the front end of the slide that moves the power head during feed and pull-out (forward and backward) movements, used to hold the drill rod during connection and disconnection.

[0004] In down-drilling mode (drilling operation): The power head chuck clamps the drill rod and drills forward, while the chuck on the slide opens simultaneously. After the power head reaches the front of the slide, the chuck clamps the drill rod, the chuck opens, and the power head, without the drill rod, retreats to the rear of the slide. After connecting a new drill rod, the chuck clamps the new drill rod, the chuck opens, and it drills forward again, continuously connecting drill rods, and repeating this process.

[0005] In tripping mode (drill retraction operation): After the power head moves to the front of the slide, the chuck clamps and the holder opens, and the power head retracts with the drill pipe. When the power head moves to the rear of the slide, the holder clamps the drill pipe, the chuck opens, and the rear drill pipe is removed. Then, the power head moves forward to the front of the slide without the drill pipe, the chuck clamps the drill pipe, the holder opens, and the drill pipe is retracted again. This process of removing and retracting the drill pipe is repeated continuously.

[0006] The typical approach involves using hydraulic pressure as the driving force for the clamping and opening actions of the chuck and gripper, employing a hydraulic control system. The chuck uses pressurized oil for clamping and release for opening, while the gripper uses pressurized oil for opening and release for clamping. To ensure construction safety, especially during high-angle drilling, the drilling rig must ensure that at least one of the chuck and gripper is holding the drill rod in place at all times to prevent slippage. Furthermore, to ensure drilling efficiency, the hydraulic control system automatically links the clamping and opening of the chuck and gripper to the drilling rig's tripping, eliminating the need for separate manual control. During the startup phase of the power head feed in drilling mode or the power head pull-out in tripping mode, the clamping mode will switch from the clamping device clamping and the chuck opening state to the clamping device opening and the chuck clamping state. During this transition, both the opening of the clamping device and the clamping of the chuck require the supply of hydraulic pressure oil. During the opening of the clamping device, the oil supply pressure will drop suddenly and then gradually rise. This will cause the clamping device to loosen but the chuck to not clamp during this period, resulting in the drill pipe slipping. Summary of the Invention

[0007] This invention addresses the shortcomings of existing technologies by providing a mining drilling rig anti-slip device and its usage method that features a reasonable structural design, high safety and reliability, and effectively prevents slippage during jacking hole construction.

[0008] This invention is achieved through the following technical solution: a device for preventing rod slippage during top hole construction in mining drilling rigs, comprising a chuck and a clamp, with chuck oil pipe and clamp oil pipe respectively connected to the chuck and clamp. The device is characterized by further including a three-position four-way directional valve. When the three-position four-way directional valve is in the neutral position, the hydraulic supply pipe is connected to the chuck oil pipe, and the hydraulic return pipe is connected to the clamp oil pipe. When the three-position four-way directional valve is in the left position, both the chuck oil pipe and the clamp oil pipe are connected to the hydraulic supply pipe. When the three-position four-way directional valve is in the right position, both the chuck oil pipe and the clamp oil pipe are connected to the hydraulic return pipe. A sequence valve is installed on the clamp oil pipe, guiding it towards the clamp. A check valve is also connected to the clamp oil pipe in parallel with the sequence valve, guiding it towards the three-position four-way directional valve. This solution, by setting a three-position four-way directional valve, provides a safe "stop position" for state switching, ensuring a transitional phase where both are clamped simultaneously during the switching process. Meanwhile, a sequence valve is connected in series on the clamp's oil line, and a reverse-flow check valve is connected in parallel. When the clamp needs to be opened, the pressurized oil must overcome the set pressure of the sequence valve to enter the clamp. This effectively avoids premature opening of the clamp due to a sudden drop in pressure during oil supply, ensuring that the chuck has built up sufficient clamping force before the clamp opens, fundamentally eliminating the risk of slippage during switching. The check valve provides an independent circuit for rapid pressure relief and clamping of the clamp.

[0009] As an optimization, the three-position four-way directional valve is a hydraulically controlled valve, with the left and right control oil pipes connected to the left and right hydraulic control ports, respectively. This design sets the three-position four-way directional valve as a hydraulically controlled valve, facilitating automatic control via pressure signals without manual intervention, thus improving the automation level and response speed of the operation.

[0010] As an optimization, a three-position five-way directional valve is also included. The two outlets of the three-position five-way directional valve are connected to the left and right control oil pipes, respectively, while the two inlets are connected to the feed pressure signal and the pull-out pressure signal, respectively. In drilling down mode, the three-position five-way directional valve is in the right position, with the feed pressure signal connected to the left control oil pipe and the pull-out pressure signal connected to the right control oil pipe. In drilling up mode, the three-position five-way directional valve is in the left position, with the feed pressure signal connected to the right control oil pipe and the pull-out pressure signal connected to the left control oil pipe. This solution introduces a three-position five-way directional valve and intelligently distributes the feed pressure signal and pull-out pressure signal to the left and right control oil pipes of the three-position four-way directional valve according to the drilling down or drilling up mode. This achieves deep linkage between the hydraulic system and the drilling rig's working mode, allowing the anti-slip logic to automatically adapt to different working conditions without requiring additional operator judgment, thus reducing operational complexity.

[0011] As an optimization, the three-position five-way directional valve is a hydraulically controlled valve. The tripping selection pressure signal is connected to the left hydraulic control port of the three-position five-way directional valve, and the down-drilling selection pressure signal is connected to the right hydraulic control port of the three-position five-way directional valve. This solution also sets the three-position five-way directional valve as a hydraulically controlled valve, and uses the "tripping selection pressure signal" and "down-drilling selection pressure signal" as its control signals. This makes the logic switching of the entire anti-slip device entirely driven by the drilling rig's own mode selection signal, realizing fully hydraulic automatic control and improving the system's reliability and integration.

[0012] As an optimization, when the three-position five-way directional valve is in the neutral position, the left control oil pipe and the right control oil pipe are connected and directly lead back to the oil tank.

[0013] A method for using an anti-slip rod device for top hole construction in a mining drilling rig includes the following steps: a. Initial state: There is no oil pressure in the tripping selection pressure signal and the down-drilling selection pressure signal. The three-position five-way directional valve is in the middle position. The left control oil pipe and the right control oil pipe are both connected to the return oil port. The three-position four-way directional valve is in the middle position. The hydraulic oil supply pipe is connected to the chuck oil pipe to make the chuck clamp. The hydraulic oil return pipe is connected to the holder oil pipe to make the holder clamp. b. In drilling mode and during feed: The drilling selection pressure signal provides oil pressure, the three-position five-way directional valve is in the right position, the feed pressure signal is connected to the left control oil pipe, the pull-out pressure signal is connected to the right control oil pipe, the feed pressure signal provides oil pressure, so that the three-position four-way directional valve is in the left position, the chuck oil pipe and the holder oil pipe are both connected to the hydraulic oil supply pipe, the chuck is clamped, the pressure oil in the holder oil pipe passes through the sequence valve, it needs to reach the set opening pressure value of the sequence valve before it can enter the holder through the sequence valve and open the holder. During this process, ensure that the clamping pressure of the chuck will not be lower than the set value of the sequence valve. Before the sequence valve opens, the chuck and holder are both in the clamped state to ensure that the rod does not slip during the linkage conversion process; c. In tripping and pulling modes: The tripping selection pressure signal provides oil pressure, and the three-position five-way directional valve is in the left position. At this time, the feed pressure signal is connected to the right control oil pipe, and the pulling pressure signal is connected to the left control oil pipe. The pulling pressure signal provides oil pressure, causing the three-position four-way directional valve to be in the left position. The chuck oil pipe and the holder oil pipe are both connected to the hydraulic oil supply pipe. The chuck clamps, and the pressure oil in the holder oil pipe passes through the sequence valve. It needs to reach the set opening pressure value of the sequence valve before it can enter the holder and open the holder. During this process, it is ensured that the clamping pressure of the chuck will not be lower than the set value of the sequence valve. Before the sequence valve opens, the chuck and holder are both in the clamped state to ensure that the rod does not slip during the linkage conversion process.

[0014] As an optimization, the following steps are also included: d. In drilling mode and during pull-out: The drilling selection pressure signal provides oil pressure, and the three-position five-way directional valve is in the right position. At this time, the feed pressure signal is connected to the left control oil pipe, and the pull-out pressure signal is connected to the right control oil pipe. The pull-out pressure signal provides oil pressure, which makes the three-position four-way directional valve in the right position. The chuck oil pipe and the gripper oil pipe are both connected to the hydraulic return oil pipe. The gripper returns oil through the check valve to clamp, and the chuck returns oil to release. e. In tripping mode and during feed: The tripping selection pressure signal provides oil pressure, the three-position five-way directional valve is in the left position, at this time the feed pressure signal is connected to the right control oil pipe, the tripping pressure signal is connected to the left control oil pipe, the feed pressure signal provides oil pressure, so that the three-position four-way directional valve is in the right position, the chuck oil pipe and the clamp oil pipe are both connected to the hydraulic return oil pipe, the clamp returns oil through the check valve to clamp, and the chuck returns oil to release.

[0015] The beneficial effects of this invention are as follows: This invention features a three-position four-way directional valve, achieving a dual safety locking state where the chuck and gripper are simultaneously clamped in the middle position. This provides a transitional stop position without the risk of rod slippage during operational mode switching. Simultaneously, a sequence valve is connected in series and a check valve is connected in parallel in the gripper's hydraulic circuit. This ensures that during the switching process requiring gripper opening, the pressurized oil must overcome the set pressure of the sequence valve before entering the gripper. This forces the chuck to establish sufficient clamping force before the gripper, avoiding the dangerous period of "gripper released, chuck not clamped" caused by a sudden drop in oil supply pressure. Furthermore, combined with the three-position five-way directional valve's automatic identification and hydraulic control linkage for drilling rig tripping / drilling modes, the entire anti-rod slippage logic is fully integrated into the drilling rig's operation process, requiring no manual intervention. Therefore, this invention fundamentally eliminates the safety hazard of drill rod slippage during top hole construction through hydraulic control, significantly improving the reliability and safety of drilling operations at large elevation angles and vertical holes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the initial state of the present invention; Figure 2 This is a schematic diagram of the stopped state in the drilling mode of the present invention; Figure 3 This is a schematic diagram of the feed state in the drilling mode of the present invention; Figure 4 This is a schematic diagram of the pulling-out state under the drilling mode of the present invention; Figure 5 This is a schematic diagram of the stopped state under the drilling start-up mode of the present invention; Figure 6 This is a schematic diagram of the feed state under the drilling start-up mode of the present invention; Figure 7 This is a schematic diagram of the pulling-out state under the drilling mode of the present invention; Figure 8 This is a flowchart illustrating the usage of the present invention; As shown in the figure: 1. Chuck, 2. Clamp, 3. Sequence valve, 4. Check valve, 5. Three-position four-way directional valve, 6. Three-position five-way directional valve, 7. Chuck oil pipe, 8. Clamp oil pipe, 9. Hydraulic oil supply pipe, 10. Hydraulic oil return pipe, 11. Left side control oil pipe, 12. Right side control oil pipe. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0018] like Figures 1-8 As shown, the present invention provides a device for preventing slippage of a drilling rig top hole during drilling, comprising a chuck 1, a clamp 2, a sequence valve 3, a check valve 4, a three-position four-way directional valve 5, and a three-position five-way directional valve 6.

[0019] Chuck 1 is mounted on the power head of the drilling rig and is used to clamp the drill rod. It operates by clamping with pressurized oil and opening with depressurized oil. Clamp 2 is mounted on the front end of the feed carriage of the power head and is used to clamp the drill rod when connecting or disconnecting it. It also operates by opening with pressurized oil and clamping with depressurized oil.

[0020] Chuck 1 is connected to the first working port A of the three-position four-way directional valve 5 via chuck oil pipe 7, and clamp 2 is connected to the second working port B of the three-position four-way directional valve 5 via clamp oil pipe 8. The inlet port P of the three-position four-way directional valve 5 is connected to the hydraulic supply pipe 9, and the return port T is connected to the hydraulic return pipe 10.

[0021] A sequence valve 3 is connected in series on the clamp oil pipe 8. The inlet of the sequence valve 3 faces the three-position four-way directional valve 5, and the outlet faces the clamp 2. That is, when the pressurized oil flows from the three-position four-way directional valve 5 to the clamp 2, it must pass through the sequence valve 3, and the sequence valve 3 is only opened when the oil pressure reaches the set opening pressure of the sequence valve 3. At the same time, a check valve 4 is connected in parallel on the clamp oil pipe 8. The opening direction of the check valve 4 is opposite to that of the sequence valve 3, that is, from the clamp 2 to the three-position four-way directional valve 5, allowing the pressurized oil in the clamp 2 to flow back to the three-position four-way directional valve 5 quickly. Here, the other end of the check valve and the sequence valve jointly open the three-position four-way directional valve.

[0022] The three-position four-way directional valve 5 is a hydraulically controlled three-position four-way directional valve. Its left hydraulic control port is connected to the left control oil pipe 11, and its right hydraulic control port is connected to the right control oil pipe 12. The three-position four-way directional valve 5 has three working positions: In the neutral position, the P port is connected to the A port, and the B port is connected to the T port. That is, the pressure oil in the hydraulic supply pipe 9 enters the chuck oil pipe 7 through P→A to drive the chuck 1 to clamp. At the same time, the clamp oil pipe 8 is connected to the hydraulic return oil pipe 10 through B→T. The pressure oil in the clamp 2 returns through the check valve 4, the B port, and the T port. The clamp 2 is depressurized and clamped. At this time, both the chuck and the clamp are in the clamped state.

[0023] When in the left position, port P is simultaneously connected to ports A and B, and port T is closed. This means that pressurized oil enters both the chuck oil pipe 7 and the clamp oil pipe 8 at the same time, keeping the chuck 1 clamped. The pressurized oil in the clamp oil pipe 8 must pass through the sequence valve 3 and reach the opening pressure before it can enter the clamp 2 to open it. When in the right position, ports A and B are simultaneously connected to port T, and port P is closed. This means that both the chuck oil pipe 7 and the clamp oil pipe 8 are connected to the hydraulic return oil pipe 10. The chuck 1 is depressurized and opened, and the pressurized oil in the clamp 2 returns quickly through the check valve 4. The clamp 2 is depressurized and clamped.

[0024] The three-position five-way directional valve 6 is also a hydraulically controlled three-position four-way directional valve. Its two working ports are connected to the left control oil pipe 11 and the right control oil pipe 12, respectively. The two oil inlets of the three-position five-way directional valve 6 are connected to the feed pressure signal and the pull-out pressure signal, respectively: the feed pressure signal is connected to port P1 of the three-position five-way directional valve 6, and the pull-out pressure signal is connected to port P2. The left hydraulic control port of the three-position five-way directional valve 6 is connected to the pull-out selection pressure signal, the right hydraulic control port is connected to the down-drill selection pressure signal, and its T port is connected to the return oil. The working positions of the three-position five-way directional valve 6 are as follows: In the neutral position, when there is no oil pressure in either the tripping selection pressure signal or the down-the-hole selection pressure signal, the three-position five-way directional valve 6 is in the neutral position, the left control oil pipe 11 and the right control oil pipe 12 are connected and directly lead back to the oil tank, and the left and right hydraulic control ports of the three-position four-way directional valve 5 are depressurized, so that the three-position four-way directional valve 5 is in the neutral position; In the left position, when the tripping selection pressure signal provides oil pressure, the three-position five-way directional valve 6 switches to the left position. At this time, the feed pressure signal is connected to the right control oil pipe 12, and the pull-out pressure signal is connected to the left control oil pipe 11; In the right position, when the down-the-hole selection pressure signal provides oil pressure, the three-position five-way directional valve 6 switches to the right position. At this time, the feed pressure signal is connected to the left control oil pipe 11, and the pull-out pressure signal is connected to the right control oil pipe 12.

[0025] The following is combined with Figures 1 to 8 This invention describes the method of use of the present invention, that is, the specific steps of each working condition during the drilling process of the drilling rig at the top hole.

[0026] Initial state as Figure 1 As shown, the drilling rig is not performing any tripping or descent operations, and there is no oil pressure in either the tripping or descent selection pressure signal. The three-position five-way directional valve 6 is in the neutral position, with oil returning from both the left control oil pipe 11 and the right control oil pipe 12. There is no pressure at the left and right hydraulic control ports of the three-position four-way directional valve 5, so the three-position four-way directional valve 5 is also in the neutral position. At this time, the pressure oil from the hydraulic supply pipe 9 enters the chuck oil pipe 7 via the P→A port of the three-position four-way directional valve 5, and the chuck 1 clamps. The holder oil pipe 8 is connected to the return oil via the B→T port of the three-position four-way directional valve 5, and the pressure oil in the holder 2 returns through the check valve 4, port B, and port T, and the holder 2 clamps. The system is in a safe locked state with both the chuck and holder clamped.

[0027] When the down-drilling mode is selected, the down-drilling selection pressure signal provides oil pressure, switching the three-position five-way directional valve 6 to the right position, such as... Figure 2 , Figure 3 , Figure 4As shown. In the down-drilling stop state, there is no oil pressure in either the feed pressure signal or the pull-out pressure signal. The three-position four-way directional valve 5 remains in the neutral position, and the system is still in a double-clamped state. The drill pipe is simultaneously fixed by the chuck and the holder, ensuring a safe stop. In the down-drilling feed state, when the power head needs to advance, the feed pressure signal provides oil pressure. This pressure oil enters the left control oil pipe 11 via the right position of the three-position five-way directional valve 6, pushing the three-position four-way directional valve 5 to switch to the left position. At this time, the pressure oil in the hydraulic supply pipe 9 simultaneously enters the chuck oil pipe 7 and the holder oil pipe 8. The chuck 1 immediately receives pressure oil and remains clamped. The pressure oil in the holder oil pipe 8 flows to the sequence valve 3. Due to the throttling and opening pressure setting of the sequence valve 3, the oil pressure needs to gradually increase to the set value of the sequence valve 3 before it can enter the holder 2 through the sequence valve 3, thus opening the holder 2. During the pressure rise, the clamping pressure of chuck 1 remains at a high level and not lower than the set value of the sequence valve. Therefore, before the sequence valve 3 opens, the holder 2 has not yet opened while chuck 1 is reliably clamped. The holder 2 only opens after the sequence valve 3 opens, achieving a seamless switch of "ensuring chuck clamping first, then opening the holder," preventing rod slippage. Afterward, the power head drives the drill pipe forward. In the down-drilling and up-pulling state, when the power head needs to retract without load (e.g., retracting to reconnect the drill pipe after completing one stroke), the up-pulling pressure signal provides oil pressure. This pressurized oil enters the right-side control oil pipe 12 through the right position of the three-position five-way directional valve 6, pushing the three-position four-way directional valve 5 to switch to the right position. At this time, both chuck oil pipe 7 and holder oil pipe 8 are connected to the hydraulic return oil pipe 10, and chuck 1 is depressurized and opened; the pressurized oil in holder 2 returns quickly through the one-way valve 4, and holder 2 immediately clamps. In this state, the clamp 2 clamps the drill rod separately to prevent it from slipping, while the chuck 1 opens to allow the power head to retract unloaded.

[0028] When the tripping mode is selected, the tripping selection pressure signal provides oil pressure, switching the three-position five-way directional valve 6 to the left position, such as... Figure 5 , Figure 6 , Figure 7As shown. In the trip-out stop state, there is no oil pressure on either the feed pressure signal or the pull-out pressure signal. The three-position four-way directional valve 5 remains in the neutral position, and the system is in a double-clamping state, ensuring a safe stop. In the trip-out and pull-out state, when the power head needs to pull the drill pipe backward, the pull-out pressure signal provides oil pressure. This pressure oil enters the left control oil pipe 11 through the left position of the three-position five-way directional valve 6, pushing the three-position four-way directional valve 5 to switch to the left position. Similar to the down-drilling feed state, pressure oil is supplied to both the chuck and the holder simultaneously. The sequence valve 3 ensures that the chuck first establishes sufficient clamping pressure before the holder opens, achieving a safe transition. Afterward, the power head pulls the drill pipe backward. In the trip-out feed state, when the power head needs to advance without load (for example, after removing a drill pipe, the power head needs to advance to the front end to prepare to clamp the next drill pipe), the feed pressure signal provides oil pressure. This pressure oil enters the right control oil pipe 12 through the left position of the three-position five-way directional valve 6, pushing the three-position four-way directional valve 5 to switch to the right position. At this time, both the chuck oil pipe 7 and the clamping device oil pipe 8 are connected to the hydraulic return oil pipe 10. The chuck 1 opens, and the clamping device 2 quickly returns oil and clamps through the one-way valve 4. The clamping device 2 clamps the drill rod in the hole separately to prevent it from slipping, while the chuck 1 opens to allow the power head to advance without load.

[0029] In this device, the opening pressure of sequence valve 3 should be calibrated based on the rated pressure of the drilling rig's hydraulic system and the minimum clamping pressure of the chuck, typically set to 70% to 90% of the rated clamping pressure of the chuck, to ensure that the chuck has sufficient clamping force before the sequence valve opens. One-way valve 4 uses a low-opening-pressure one-way valve to ensure rapid pressure release when the clamping device needs to clamp. Through the above-mentioned hydraulic logic control and timing coordination, this invention can effectively prevent drill pipe slippage at each stage of the chuck and clamping device state switching, making it particularly suitable for long-distance drilling operations with large elevation angles and vertical top holes.

[0030] Of course, the above description is not limited to the examples above. Technical features not described in this invention can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solutions of this invention and are not intended to limit this invention. This invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention do not depart from the spirit of this invention and should also fall within the scope of protection of the claims of this invention.

Claims

1. A device for preventing slippage during top hole construction in a mining drilling rig, comprising a chuck (1) and a clamp (2), wherein a chuck oil pipe (7) and a clamp oil pipe (8) are respectively connected to the chuck (1) and the clamp (2), characterized in that: It also includes a three-position four-way directional valve (5). When the three-position four-way directional valve (5) is in the middle position, the hydraulic oil supply pipe (9) is connected to the chuck oil pipe (7), and the hydraulic oil return pipe (10) is connected to the clamp oil pipe (8). When the three-position four-way directional valve (5) is in the left position, both the chuck oil pipe (7) and the clamp oil pipe (8) are connected to the hydraulic oil supply pipe (9). When the three-position four-way directional valve (5) is in the right position, both the chuck oil pipe (7) and the clamp oil pipe (8) are connected to the hydraulic oil return pipe (10). The clamp oil pipe (8) is equipped with a sequence valve (3) that is directed toward the clamp (2). The clamp oil pipe (8) is also connected with a check valve (4) that is connected in parallel with the sequence valve (3). The check valve (4) is directed toward the three-position four-way directional valve (5).

2. The anti-slip rod device for top hole construction of a mining drilling rig according to claim 1, characterized in that: The three-position four-way directional valve (5) is a hydraulic control valve, with the left control oil pipe (11) and the right control oil pipe (12) connected to the hydraulic control ports on the left and right sides, respectively.

3. The anti-slip rod device for top hole construction of a mining drilling rig according to claim 2, characterized in that: It also includes a three-position five-way directional valve (6). The two outlets of the three-position five-way directional valve (6) are connected to the left control oil pipe (11) and the right control oil pipe (12) respectively. The two inlets of the three-position five-way directional valve (6) are connected to the feed pressure signal and the pull-out pressure signal respectively. In the drilling mode, the three-position five-way directional valve (6) is in the right position. At this time, the feed pressure signal is connected to the left control oil pipe (11) and the pull-out pressure signal is connected to the right control oil pipe (12). In the tripping mode, the three-position five-way directional valve (6) is in the left position. At this time, the feed pressure signal is connected to the right control oil pipe (12) and the pull-out pressure signal is connected to the left control oil pipe (11).

4. The anti-slip rod device for top hole construction of a mining drilling rig according to claim 3, characterized in that: The three-position five-way directional valve (6) is a hydraulic control valve. The drilling start selection pressure signal is connected to the left hydraulic control port of the three-position five-way directional valve (6), and the drilling down selection pressure signal is connected to the right hydraulic control port of the three-position five-way directional valve (6).

5. The anti-slip rod device for top hole construction of a mining drilling rig according to claim 3, characterized in that: When the three-position five-way directional valve (6) is in the middle position, the left control oil pipe (11) and the right control oil pipe (12) are connected and directly connected to the oil tank.

6. A method of using the anti-slip rod device for top hole construction of a mining drilling rig as described in claim 4, characterized in that, Includes the following steps: a. In the initial state: there is no oil pressure in the tripping selection pressure signal and the tripping selection pressure signal. The three-position five-way directional valve (6) is in the middle position. The left control oil pipe (11) and the right control oil pipe (12) are both connected to the return oil port. The three-position four-way directional valve (5) is in the middle position. The hydraulic oil supply pipe (9) is connected to the chuck oil pipe (7) to clamp the chuck (1). The hydraulic oil return pipe (10) is connected to the clamp oil pipe (8) to clamp the clamp (2). b. In the drilling mode and during feed: The drilling selection pressure signal provides oil pressure, the three-position five-way directional valve (6) is in the right position, at this time the feed pressure signal is connected to the left control oil pipe (11), the pull-out pressure signal is connected to the right control oil pipe (12), the feed pressure signal provides oil pressure, so that the three-position four-way directional valve (5) is in the left position, the chuck oil pipe (7) and the clamp oil pipe (8) are both connected to the hydraulic oil supply pipe (9), the chuck (1) clamps, the pressure oil of the clamp oil pipe (8) passes through the sequence valve (3), it needs to reach the set opening pressure value of the sequence valve (3) to enter the clamp through the sequence valve and open the clamp. During this process, ensure that the clamping pressure of the chuck will not be lower than the set value of the sequence valve. Before the sequence valve (3) is opened, the chuck (1) and the clamp (2) are both in the clamping state to ensure that the rod does not slip during the linkage conversion process. c. In the drilling and pulling-out mode: The drilling selection pressure signal provides oil pressure, the three-position five-way directional valve (6) is in the left position, at this time the feed pressure signal is connected to the right control oil pipe (12), the pulling-out pressure signal is connected to the left control oil pipe (11), the pulling-out pressure signal provides oil pressure, so that the three-position four-way directional valve (5) is in the left position, the chuck oil pipe (7) and the clamp oil pipe (8) are both connected to the hydraulic oil supply pipe (9), the chuck (1) clamps, the pressure oil of the clamp oil pipe (8) passes through the sequence valve (3), it needs to reach the set opening pressure value of the sequence valve (3) to enter the clamp through the sequence valve and open the clamp. During this process, it is ensured that the clamping pressure of the chuck will not be lower than the set value of the sequence valve. Before the sequence valve (3) is opened, the chuck (1) and the clamp (2) are both in the clamping state to ensure that the rod does not slip during the linkage conversion process.

7. The method of use according to claim 6, characterized in that, It also includes the following steps: d. Drilling down mode and pulling up: The drilling down selection pressure signal provides oil pressure, the three-position five-way directional valve (6) is in the right position, at this time the feed pressure signal is connected to the left control oil pipe (11), the pulling up pressure signal is connected to the right control oil pipe (12), the pulling up pressure signal provides oil pressure, so that the three-position four-way directional valve (5) is in the right position, the chuck oil pipe (7) and the clamp oil pipe (8) are both connected to the hydraulic return oil pipe (10), the clamp (2) returns oil through the check valve (4) to clamp, and the chuck (1) returns oil to release; e. In the tripping mode and during feed: the tripping selection pressure signal provides oil pressure, the three-position five-way directional valve (6) is in the left position, at this time the feed pressure signal is connected to the right control oil pipe (12), the tripping pressure signal is connected to the left control oil pipe (11), the feed pressure signal provides oil pressure, so that the three-position four-way directional valve (5) is in the right position, the chuck oil pipe (7) and the clamp oil pipe (8) are both connected to the hydraulic return oil pipe (10), the clamp (2) returns oil through the check valve (4) to clamp, and the chuck (1) returns oil to release.

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