Novel mechanical rock breaking slotting device

Abstract

The invention discloses a novel mechanical rock breaking slotting device, and relates to the technical field of slotting devices for mines, the novel mechanical rock breaking slotting device comprises a slotting device shell and a tail joint, the tail joint can be inserted in a sliding manner along the tail of the slotting device shell, a cutter arm groove is formed in the slotting device shell, a cutter arm is rotatably connected in the cutter arm groove, and the tail joint can be inserted into the tail of the slotting device shell. A driving assembly is slidably connected into the slotting device shell, the driving assembly is matched with the tool arm, and the driving assembly is arranged on the path where the tail connector is inserted into the slotting device shell. The tail connector is inserted into the slotting device shell to push the driving assembly, the driving assembly drives the tool arm to be unfolded, rock breaking and slotting are conducted on an extraction drill hole through the tool arm, the supporting force for opening the tool arm is the pushing force of a drill rod of a drilling machine to the tail connector, and the supporting force for opening the tool arm is greatly improved; the technical problems that a tool arm of an existing slotting device is opened through high-speed rotation and inertia, the supporting force for opening the tool arm is small, and slotting work cannot be normally completed in hard coal and rock strata are solved.

Description

Technical Field

[0001] The invention relates to the technical field of slotting tools used in mines, in particular to a novel mechanical rock breaking slotting tool. Background Art

[0002] The complicated occurrence conditions and low permeability of coal seams in my country have led to gas disasters that have long restricted safe and efficient coal mining. The pre-extraction of coal seam gas by through-layer drilling is the core technology for preventing and controlling coal and gas outburst disasters, and the quality of drilling and sealing directly affects the effect of gas disaster management. However, the surrounding rock of gas extraction through-layer drilling is broken, cracked, and porous, which easily forms leakage channels, making the bottom of the extraction borehole connected to the atmosphere of the tunnel outside the hole. Under the action of the negative pressure of extraction, air is sucked into the hole, resulting in low concentration of gas drilling extraction, and a large amount of air components in the gas sample components of the main and branch pipes of the extraction pipeline. Using the more advanced "two blocking and one injection" pressure sealing process, the problem of drilling leakage has not been fundamentally solved. It is necessary to improve the sealing process, seal the cracks and leakage channels in the surrounding rock of the extraction borehole, and realize efficient extraction of coal seam gas.

[0003] In view of the technical difficulties in gas disaster management caused by gas drainage through-layer drilling leakage, a new technology of integrated sealing is proposed. This technology is a new technology that innovatively combines the traditional "two blocking and one injection" sealing process with the mechanical slitting technology. It is suitable for solving the gas drainage through-layer drilling sealing leakage problem under various types of geological conditions. Through the in-situ slitting transformation of the extraction borehole, a new technology of integrated sealing of gas drainage through-layer drilling isolation with "cutting, injection, sealing, and isolation" as the core is developed to achieve efficient gas extraction in deep three soft coal seams. How to use the mechanical slitter to make annular slits at the predetermined position of the sealing section is one of the key technologies of slitting grouting sealing technology.

[0004] Existing mechanical reamer, such as the Chinese patent with authorization announcement number CN217558255U, discloses a mining reaming tool, and its specification 0013 paragraph records: The opening of the knife arm of the mining reaming tool is powered by the centrifugal force generated by the rotation of the drill rod, and the closing of the knife arm is powered by the spring. Specifically, when reaming, the reaming tool enters the hole of the coal seam section after drilling with the drill bit, and then the drill rod speed is increased. The knife arm slowly opens outward under the action of centrifugal force, and the knife arms on both sides begin to contact the coal body. As the centrifugal force continues to increase, the knife arm opening angle also continues to increase, the rack compresses the spring inward to store energy, and the knife arm rotates and cuts the coal body under the drive of the drill rod. As the rotation speed increases, the angle between the cutter body and the cutter arm slowly increases to a fully opened angle of 90°, pushing the drill rod forward to expand the hole. At this time, the drill rod rotation speed can be lowered to ensure that the cutter arm contacts the hole wall to cut the coal body. After the cutter arm cuts the coal wall to form a cave, the drill rod rotation speed is lowered again, and the centrifugal force gradually decreases. The compressed spring pushes the rack to drive the cutter arm to move inward and gradually close. During the process of expanding the hole and closing the cutter arm, the water spray holes 1 and 2 of the installation slot spray water outward to assist in breaking the coal and flushing the coal dust that falls into the installation slot, ensuring that the cutter arm can be smoothly retracted.

[0005] However, in actual use, it was found that the blade arm of the mechanical reamer in the above-mentioned public document opens by inertia through high-speed rotation, and the support force of the blade arm opening is relatively small, and it is only suitable for rapid cutting in soft coal. In hard coal and rock formations, the blade arm cannot be opened normally by inertia and the cutting work cannot be completed normally. Summary of the invention

[0006] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a novel mechanical rock breaking slotting device, which solves the technical problem that the knife arm of the existing slotting device rotates at high speed and opens by inertia, and the supporting force of the knife arm when opened is small, so the slotting work cannot be completed normally in hard coal and rock formations.

[0007] The technical solution of the present invention is implemented as follows: a new type of mechanical rock breaking slotter, including a slotter housing and a tail joint for connecting a drill rod of a drilling rig, wherein the tail joint can be slidably inserted along the tail of the slotter housing, and the tail joint can rotate synchronously with the slotter housing. A knife arm groove is provided on the slotter housing, and a knife arm is rotatably connected in the knife arm groove. A drive assembly is slidably connected in the slotter housing, and the drive assembly is adapted to the knife arm. The drive assembly is arranged on the path of the tail joint inserted into the slotter housing. The present application utilizes a tail joint to be inserted into the slotting device housing to push the driving component, and utilizes the driving component to drive the cutter arm to expand, and then utilizes the cutter arm to break rock and cut the surrounding rock of the extraction borehole, wherein the force of the tail joint inserted into the slotting device housing is the thrust provided by the drill rod of the drilling rig, and the method of the tail joint pushing the driving component to drive the cutter arm to expand replaces the existing method of opening by high-speed rotation and inertia, and the supporting force for opening the cutter arm of the present application is the pushing force of the drill rod of the drilling rig on the tail joint, and the supporting force is greatly improved, so that the cutter arm of the present application can be opened normally and the cutting work can be completed in both hard coal and rock formations, solving the technical problem that the cutter arm of the existing slotting device is opened by high-speed rotation and inertia, and the supporting force for opening the cutter arm is small, and the cutting work cannot be completed normally in hard coal and rock formations.

[0008] Preferably, a fixing hole is provided inside the slot cutter housing, the driving assembly includes a moving shaft, the end of the moving shaft is connected to a rack, the moving shaft is slidably arranged in the fixing hole, the knife arm is provided with teeth, the knife arm groove is connected to the fixing hole, the teeth extend into the fixing hole and mesh with the rack, the rack at one end of the moving shaft is located on the path of the tail joint inserted into the slot cutter housing, and the other end is connected to a reset spring, the reset spring is located in the fixing hole. The teeth mesh with the rack, and when the rack moves, the knife arm is driven to rotate, thereby realizing the expansion and retraction of the knife arm; the moving distance of the knife arm is determined by the length of the tail joint inserted into the slot cutter housing. The tail joint is located at one end of the slotter housing, and the reset spring is located at the other end of the slotter housing. When the drill rod of the drilling rig pushes the tail joint to be inserted into the slotter housing, the movable shaft and the rack move toward the reset spring. At this time, the reset spring is compressed by the movable shaft, and the knife arm is unfolded; when the drill rod of the drilling rig does not push the tail joint, the reset spring provides a reverse force to the movable shaft, so that the movable shaft and the rack move toward one end of the tail joint, thereby retracting the knife arm into the knife arm groove.

[0009] Preferably, a second slot is provided at one end of the slotting device housing, a second slide is provided in the second slot, a tail connecting tube is provided on the tail joint, the tail connecting tube is plugged into the second slot, a second slider is provided on the tail connecting tube, the second slider is slidably matched with the second slide, and the second slider is retractably arranged along the radial direction of the tail connecting tube. The plugging and matching of the tail connecting tube and the second slot realizes the limitation of the path of the tail joint inserted into the slotting device housing, and the sliding matching of the second slider and the second slide prevents the tail joint from being separated from the slotting device housing, wherein the second slider is retractably arranged along the radial direction of the tail connecting tube, when the tail joint is inserted into the slotting device housing, the second slider is manually pressed to retract the second slider into the tail connecting tube, when the tail joint is inserted into the slotting device housing, the second slider extends out and slidably matches with the second slide, and the second slider extends out of the second slide, and when the drill rod of the drilling rig drives the tail joint to rotate, the tail joint drives the slotting device housing and the knife arm on the slotting device housing to rotate.

[0010] Preferably, a connecting column is provided on the tail joint, and when the tail joint is inserted into the slot cutter housing, the connecting column pushes the rack to move. When the drill rod pushes the tail joint to be inserted into the slot cutter housing, the connecting column pushes the rack to move, and the thrust provided by the drill rod is transmitted by the connecting column, and a water injection hole is provided on the connecting column. When the drill rod is connected to the tail joint, high-pressure water provided by the drill rod enters from the water injection hole and is ejected from the knife arm slot, so that when the knife arm performs slot cutting, the high-pressure water enters from the water injection hole and is ejected from the knife arm slot to cool the knife arm, and at the same time carries rock powder along the borehole and is discharged out of the hole.

[0011] Preferably, the knife arm is connected with a rotating shaft, and the rotating shaft is rotatably connected to the inner wall of the knife arm groove. The knife arm is fixedly connected to the rotating shaft, and the setting of the rotating shaft provides a rotating hinge point for the knife arm. The knife arm rotates by the meshing of the teeth and the rack. When the knife arm is fully extended, the teeth and the rack are still meshed, ensuring that the knife arm will not loosen when the knife arm is cutting, which is conducive to ensuring the accuracy of the cutting work.

[0012] Preferably, at least two blade arms are provided on the slotting device housing; a blade block for cutting coal and rock is provided on the blade arm; at least two blade blocks are provided on the blade arm. Preferably, two blade arms are provided on the slotting device housing, and the two blade arms are arranged symmetrically. Blade blocks are provided on the blade arms to improve the cutting strength of the blade arms. The blade arms are forged as a whole with alloy and quenching process, so they have high strength; diamond is plated on the blade block to increase the strength of the blade block, which is conducive to slotting the surrounding rock of the drilling hole.

[0013] Preferably, a head tube section is provided on the slotting device housing, and the reset spring is connected to the head tube section. The head tube section is provided to increase the compression degree of the reset spring, thereby ensuring that the reset spring can increase more reaction force. When the slotting device of the present application performs slotting work, the hole is first drilled to the predetermined slotting position, the head tube section is pressed against the inner wall of the borehole, and the head tube section moves toward the slotting device housing under the pressure of the inner wall of the borehole. The head tube section drives one end of the reset spring to be compressed. When the head tube section is fully extended into the slotting device housing, the drilling rig applies a thrust to the tail joint to expand the knife arm, and then the fixed-point slotting work of the surrounding rock of the drilling hole can be performed, and the other end of the reset spring is also compressed at this time.

[0014] Preferably, the slotting device housing is provided with a first slot, the first slot is provided with a first slide, the head pipe section is provided with a head connecting tube, the head connecting tube is plugged and matched with the first slide, the head connecting tube is provided with a first slider, the first slider is slidably matched with the first slide, and the first slider is retractably arranged along the radial direction of the head connecting tube. The plugging and matching of the head connecting tube and the first slide achieves the limitation of the path of the head pipe section inserted into the slotting device housing, and the sliding matching of the first slider and the first slide prevents the head connecting tube from being separated from the slotting device housing, wherein the first slider is retractably arranged along the radial direction of the head connecting tube, when the head pipe section is inserted into the slotting device housing, the first slider is manually pressed to retract the first slider into the head connecting tube, and when the head pipe section is inserted into the slotting device housing, the first slider is extended and slidably matched with the first slide, and the first slider is extended out of the first slide.

[0015] Preferably, the head connecting tube is provided with a first fixed groove, the first slider is a T-shaped slider, the T-shaped slider is slidably matched with the first fixed groove, a first fixed spring is connected in the first fixed groove, and the first slider is connected to the first fixed spring; the tail connecting tube is provided with a second fixed groove, the second slider is a T-shaped slider, the T-shaped slider is slidably matched with the second fixed groove, a second fixed spring is connected in the second fixed groove, and the second slider is connected to the second fixed spring. The first slider and the second slider have the same structure, and the head connecting tube can be inserted into the first slot by compressing the first slider into the first fixed groove; the tail connecting tube can be inserted into the second slot by compressing the second slider into the second fixed groove, and after the tail connecting tube is inserted into the second slot, the second slider is ejected by the second fixed spring and extends into the second slide groove, and when the drill rod of the drilling rig drives the tail joint to rotate, the tail joint drives the slotting device shell and the knife arm on the slotting device shell to rotate.

[0016] Preferably, the tail joint is provided with a drill rod connection hole for connecting a drill rod of a drilling rig. The drill rod connection hole of the drilling rig is provided with an internal thread to facilitate the threaded connection between the tail joint and the drill rod of the drilling rig, wherein the water injection hole is connected with the drill rod connection hole to facilitate the injection of high-pressure water into the drill rod of the drilling rig.

[0017] The beneficial effects of the present invention are as follows: the present invention utilizes the tail joint to insert into the slotting device housing and then push the driving component, utilizes the driving component to drive the cutter arm to expand, and then utilizes the cutter arm to break rock and cut the surrounding rock of the extraction borehole, wherein the force of the tail joint to insert into the slotting device housing is the thrust provided by the drill rod of the drilling rig, and the method of the tail joint pushing the driving component to drive the cutter arm to expand replaces the existing method of opening by inertia through high-speed rotation, and the supporting force for opening the cutter arm of the present application is the pushing force of the drill rod of the drilling rig on the tail joint, and the supporting force is greatly improved, so that the cutter arm of the present application can be normally opened and the cutting work can be completed in both hard coal and rock formations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the knife arm of the present invention being opened.

[0020] Figure 2 The figure is a schematic diagram of the connection between the head pipe section, the tail joint and the slotting device housing of the present invention.

[0021] Figure 3 It is a schematic diagram of the slotting device housing of the present invention.

[0022] Figure 4 It is a cross-sectional view of the slotting device housing of the present invention.

[0023] Figure 5 Schematic diagram of the tail joint of the present invention.

[0024] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0025] Figure 7 It is a schematic diagram of the head pipe section of the present invention.

[0026] Figure 8 for Figure 7 Schematic diagram at point B in the middle.

[0027] Fig. 9 It is an enlarged view of the knife arm of the present invention.

[0028] In the figure, 1 is a head pipe joint, 2 is a return spring, 3 is a tail joint, 4 is a knife arm, 5 is a connecting column, 6 is a water injection hole, 7 is a tail connecting tube, 8 is a head connecting tube, 9 is a slotter housing, 10 is a drill rod connecting hole, 11 is a knife arm groove, 12 is a tooth, 13 is a rack, 14 is a first slot, 15 is a first slide groove, 16 is a second slot, 17 is a second slide groove, 18 is a first slider, 19 is a first fixed slot, 20 is a first fixed spring, 21 is a second slider, 22 is a second fixed slot, 23 is a second fixed spring, 24 is a rotating shaft, 25 is a knife block, and 26 is a moving shaft. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1, a new type of mechanical rock breaking and slotting device, such as Figure 1 , Figure 2 and Figure 4 As shown, it includes a slotter housing 9 and a tail joint 3 for connecting a drill rod of a drilling rig, the tail joint 3 can be slidably inserted along the tail of the slotter housing 9, the tail joint 3 can rotate synchronously with the slotter housing 9, the slotter housing 9 is provided with a knife arm groove 11, the knife arm 4 is rotatably connected in the knife arm groove 11, the slotter housing 9 is slidably connected with a drive assembly, the drive assembly is adapted to the knife arm 4, and the drive assembly is arranged on the path of the tail joint 3 inserting into the slotter housing 9. The present application utilizes the tail joint 3 to insert into the slotting device housing 9 and then push the driving component, utilizes the driving component to drive the knife arm 4 to expand, and then utilizes the knife arm 4 to break rock and cut the surrounding rock of the extraction borehole, wherein the force of the tail joint 3 inserting into the slotting device housing 9 is the thrust provided by the drill rod of the drilling rig, and the method of the tail joint 3 pushing the driving component to drive the knife arm 4 to expand replaces the existing method of opening by high-speed rotation and inertia, and the supporting force for opening the knife arm 4 of the present application is the pushing force of the drill rod of the drilling rig on the tail joint 3, and the supporting force is greatly improved, so that the knife arm 4 of the present application can be opened normally and the cutting work can be completed in both hard coal and rock formations, solving the technical problem that the knife arm of the existing slotting device is opened by high-speed rotation and inertia, and the supporting force for opening the knife arm is small, and the cutting work cannot be completed normally in hard coal and rock formations.

[0031] Example 2, based on Example 1, a new type of mechanical rock breaking and cutting device, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the slotting device housing 9 is provided with a fixing hole inside, the driving assembly includes a moving shaft 26, the end of the moving shaft 26 is connected to a rack 13, the moving shaft 26 is slidably arranged in the fixing hole, the knife arm 4 is provided with teeth 12, the knife arm slot 11 is connected to the fixing hole, the teeth 12 extends into the fixing hole and meshes with the rack 13, the rack 13 at one end of the moving shaft 26 is located on the path of the tail joint 3 inserted into the slotting device housing 9, and the other end is connected to a reset spring 2, the reset spring 2 is located in the fixing hole. The teeth 12 mesh with the rack 13, when the rack 13 moves, it drives the knife arm 4 to rotate, thereby realizing the expansion and retraction of the knife arm 4; the moving distance of the knife arm 4 is determined by the length of the tail joint 3 inserted into the slotting device housing 9. The tail joint 3 is located at one end of the slotter housing 9, and the return spring 2 is located at the other end of the slotter housing 9. When the drill rod of the drilling rig pushes the tail joint 3 to be inserted into the slotter housing 9, the movable shaft 26 and the rack 13 move toward the return spring 2. At this time, the return spring 2 is compressed by the movable shaft 26, and the knife arm 4 is unfolded; when the drill rod of the drilling rig does not push the tail joint 3, the return spring 2 provides a reverse force to the movable shaft 26, so that the movable shaft 26 and the rack 13 move toward one end of the tail joint 3, thereby retracting the knife arm 4 into the knife arm slot 11.

[0032] Embodiment 3, based on embodiment 2, a new type of mechanical rock breaking and cutting device, such as Figure 4 , Figure 5 and Figure 6 As shown, a second slot 16 is provided at one end of the slotter housing 9, a second slide groove 17 is provided in the second slot 16, a tail connecting tube 7 is provided on the tail joint 3, the tail connecting tube 7 is plugged into the second slot 16, a second slider 21 is provided on the tail connecting tube 7, the second slider 21 is slidably matched with the second slide groove 17, and the second slider 21 is retractably arranged along the radial direction of the tail connecting tube 7. The plug-in cooperation between the tail connecting tube 7 and the second slot 16 realizes the limitation of the path of the tail joint 3 inserted into the slotting device housing 9, and the sliding cooperation between the second slider 21 and the second slide groove 17 prevents the tail joint 3 from being separated from the slotting device housing 9, wherein the second slider 21 is retractably arranged along the radial direction of the tail connecting tube 7. When the tail joint 3 is inserted into the slotting device housing 9, the second slider 21 is manually pressed to retract the second slider 21 into the tail connecting tube 7. After the tail joint 3 is inserted into the slotting device housing 9, the second slider 21 extends out and slides with the second slide groove 17. At the same time, the second slider 21 extends out of the second slide groove 17. When the drill rod of the drilling rig drives the tail joint 3 to rotate, the tail joint 3 drives the slotting device housing 9 and the knife arm 4 on the slotting device housing 9 to rotate.

[0033] Embodiment 4, based on embodiment 3, a new type of mechanical rock breaking and cutting device, such as Figure 1 and Figure 5As shown, the tail joint 3 is provided with a connecting column 5. When the tail joint 3 is inserted into the slotting device housing 9, the connecting column 5 pushes the rack 13 to move. When the drill rod pushes the tail joint 3 to insert into the slotting device housing 9, the connecting column 5 pushes the moving shaft 26 to move, thereby driving the rack 13 on the moving shaft 26 to move, and the thrust provided by the drill rod is transmitted by the connecting column 5. In addition, the connecting column 5 is provided with a water injection hole 6. When the drill rod is connected to the tail joint 3, the high-pressure water provided by the drill rod enters from the water injection hole 6 and is ejected from the knife arm slot 11, so that when the knife arm 4 performs the slotting work, the high-pressure water enters from the water injection hole 6 and is ejected from the knife arm slot 11 to cool the knife arm 4, and at the same time carries the rock powder along the borehole and is discharged out of the hole.

[0034] Example 5, based on Example 4, a new type of mechanical rock breaking and cutting device, such as Figure 1 and Fig. 9 As shown, the knife arm 4 is connected with a rotating shaft 24, and the rotating shaft 24 is rotatably connected to the inner wall of the knife arm slot 11. The knife arm 4 is fixedly connected to the rotating shaft 24, and the setting of the rotating shaft 24 provides a rotating hinge point for the knife arm 4. The knife arm 4 rotates through the meshing of the teeth 12 and the rack 13. When the knife arm 4 is fully extended, the teeth 12 and the rack 13 are still meshed, ensuring that the knife arm 4 will not loosen when the knife arm 4 is cutting, which is conducive to ensuring the accuracy of the cutting work.

[0035] Example 6, based on Example 5, a new type of mechanical rock breaking and cutting device, such as Figure 1 and Fig. 9 As shown, at least two blade arms 4 are arranged on the slotting device housing 9; blade blocks 25 for cutting coal and rock bodies are arranged on the blade arms 4; at least two blade blocks 25 are arranged on the blade arms 4. Preferably, two blade arms 4 are arranged on the slotting device housing 9, and the two blade arms 4 are symmetrically arranged. Five blade blocks 25 are arranged on the blade arms 4. The blade blocks 25 are arranged to improve the cutting strength of the blade arms 4. The blade arms 4 are made of alloy forging as a whole and use a quenching process, so they have high strength; diamonds are plated on the blade blocks 25 to increase the strength of the blade blocks 25, which is conducive to slotting the surrounding rock of the drilling hole.

[0036] Embodiment 7, based on embodiment 6, a new type of mechanical rock breaking and cutting device, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the slotting device housing 9 is provided with a head pipe section 1, and the reset spring 2 is connected to the head pipe section 1. The head pipe section 1 is provided to increase the compression degree of the reset spring 2, thereby ensuring that the reset spring 2 can increase more reaction force. When the slotting device of the present application performs slotting work, the drilling construction is first carried out to the predetermined slotting position, and the head pipe section 1 is pressed against the inner wall of the borehole. The head pipe section 1 moves toward the slotting device housing 9 under the pressure of the inner wall of the borehole, and the head pipe section 1 drives one end of the reset spring 2 to be compressed. When the head pipe section 1 is fully extended into the slotting device housing 9, the drilling rig applies a thrust to the tail joint 3 to expand the knife arm 4, and then the fixed-point slotting work of the surrounding rock of the drilling hole can be performed, and at this time, the other end of the reset spring 2 is also compressed.

[0037] Embodiment 8, based on embodiment 7, a new type of mechanical rock breaking and cutting device, such as Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the slotting device housing 9 is provided with a first slot 14, and a first slide groove 15 is provided in the first slot 14. The head connecting tube 8 is provided on the head pipe section 1, and the head connecting tube 8 is plugged and matched with the first slide groove 15. The head connecting tube 8 is provided with a first slider 18, and the first slider 18 is slidably matched with the first slide groove 15. The first slider 18 is retractably arranged along the radial direction of the head connecting tube 8. The plugging and matching of the head connecting tube 8 and the first slide groove 15 realizes the limitation of the path of the head pipe section 1 inserted into the slotting device housing 9, and the sliding matching of the first slider 18 and the first slide groove 15 prevents the head connecting tube 8 from being separated from the slotting device housing 9, wherein the first slider 18 is retractably arranged along the radial direction of the head connecting tube 8. When the head pipe section 1 is inserted into the slotting device housing 9, the first slider 18 is manually pressed to retract the first slider 18 into the head connecting tube 8. When the head pipe section 1 is inserted into the slotting device housing 9, the first slider 18 is extended and slidably matched with the first slide groove 15, and the first slider 18 is extended out of the first slide groove 15.

[0038] Embodiment 9, based on embodiment 8, a new type of mechanical rock breaking and cutting device, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the head connecting tube 8 is provided with a first fixed groove 19, the first slider 18 is a T-shaped slider, the T-shaped slider is slidably matched with the first fixed groove 19, the first fixed groove 19 is connected with a first fixed spring 20, and the first slider 18 is connected to the first fixed spring 20; the tail connecting tube 7 is provided with a second fixed groove 22, the second slider 21 is a T-shaped slider, the T-shaped slider is slidably matched with the second fixed groove 22, the second fixed groove 22 is connected with a second fixed spring 23, and the second slider 21 is connected to the second fixed spring 23. The first slider 18 and the second slider 21 have the same structure. The head connecting tube 8 can be inserted into the first slot 14 by compressing the first slider 18 into the first fixed slot 19; the tail connecting tube 7 can be inserted into the second slot 16 by compressing the second slider 21 into the second fixed slot 22. After the tail connecting tube 7 is inserted into the second slot 16, the second slider 21 is ejected by the second fixed spring 23 and extends into the second slide slot 17. When the drill rod of the drilling rig drives the tail joint 3 to rotate, the tail joint 3 drives the slotter housing 9 and the knife arm 4 on the slotter housing 9 to rotate.

[0039] Embodiment 10, based on any one of embodiments 1 to 9, a new type of mechanical rock breaking and slotting device, such as Figure 1 , Figure 2 and Figure 5 As shown, the tail joint 3 is provided with a drill rod connection hole 10 for connecting a drill rod of a drilling rig. The drill rod connection hole 10 is provided with an internal thread to facilitate the threaded connection between the tail joint 3 and the drill rod of the drilling rig, wherein the water injection hole 6 is connected to the drill rod connection hole 10 to facilitate the injection of high-pressure water into the drill rod of the drilling rig.

[0040] When implementing Example 10, first, the drilling is carried out to the predetermined slitting position, and the head pipe section 1 is pressed against the inner wall of the drill hole. The head pipe section 1 moves toward the slotting device housing 9 under the pressure of the inner wall of the drill hole, and the head pipe section 1 drives one end of the return spring 2 to be compressed. When the head pipe section 1 is fully inserted into the slotting device housing 9, the drilling rig applies a thrust to the tail joint 3. When the drill rod of the drilling rig pushes the tail joint 3 to insert into the slotting device housing 9, the rack 13 moves toward the return spring 2. At this time, the other end of the return spring 2 is also compressed, and the cutter is The arm 4 is unfolded, and the drill rod of the drilling rig is started to rotate. The drill rod of the drilling rig drives the tail joint 3 to rotate, and the tail joint 3 drives the slotting device housing 9 and the knife arm 4 on the slotting device housing 9 to rotate. The knife arm 4 rotates to perform fixed-point slotting of the surrounding rock of the drilling hole; when the drill rod of the drilling rig does not push the tail joint 3, the return spring 2 provides a reverse force to the rack 13, so that the rack 13 moves toward one end of the tail joint 3, thereby retracting the knife arm 4 into the knife arm groove 11, so as to facilitate the slotting device of the present application to be taken out along the drill hole.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel mechanical rock breaking slotting device, comprising a slotting device housing (9) and a tail joint (3) for connecting a drill pipe of a drilling rig, characterized in that: The tail joint (3) can be inserted along the tail of the slotting device housing (9) by sliding, and the tail joint (3) can rotate synchronously with the slotting device housing (9). The slotting device housing (9) is provided with a knife arm slot (11), and a knife arm (4) is rotatably connected in the knife arm slot (11). A driving component is slidably connected in the slotting device housing (9), and the driving component is adapted to the knife arm (4). The driving component is arranged on a path where the tail joint (3) is inserted into the slotting device housing (9).

2. The novel mechanical rock breaking and slotting device according to claim 1 is characterized in that: A fixing hole is provided inside the slot cutter housing (9), the driving assembly comprises a movable shaft (26), the end of the movable shaft (26) is connected to a rack (13), the movable shaft (26) is slidably arranged in the fixing hole, the knife arm (4) is provided with teeth (12), the knife arm groove (11) is connected to the fixing hole, the teeth (12) extend into the fixing hole and mesh with the rack (13), the rack (13) at one end of the movable shaft (26) is located on the path of the tail joint (3) inserted into the slot cutter housing (9), and the other end is connected to a reset spring (2), and the reset spring (2) is located in the fixing hole.

3. The novel mechanical rock breaking and slotting device according to claim 2 is characterized in that: A second slot (16) is provided at one end of the slotting device housing (9), a second slide groove (17) is provided in the second slot (16), a tail connecting tube (7) is provided on the tail joint (3), the tail connecting tube (7) is plugged into and matched with the second slot (16), a second slide block (21) is provided on the tail connecting tube (7), the second slide block (21) is slidably matched with the second slide groove (17), and the second slide block (21) is telescopically arranged along the radial direction of the tail connecting tube (7).

4. The novel mechanical rock breaking and slotting device according to claim 3 is characterized in that: The tail joint (3) is provided with a connecting column (5), and when the tail joint (3) is inserted into the slotting device housing (9), the connecting column (5) pushes the rack (13) to move.

5. The novel mechanical rock breaking and slotting device according to claim 4 is characterized in that: The knife arm (4) is connected to a rotating shaft (24), and the rotating shaft (24) is rotatably connected to the inner wall of the knife arm slot (11).

6. The novel mechanical rock breaking and slotting device according to claim 5 is characterized in that: At least two blade arms (4) are arranged on the slotting device housing (9); a blade block (25) for cutting coal and rock bodies is arranged on the blade arm (4); at least two blade blocks (25) are arranged on the blade arm (4).

7. The novel mechanical rock breaking and slotting device according to claim 6 is characterized in that: A head pipe section (1) is provided on the slotting device housing (9), and the return spring (2) is connected to the head pipe section (1).

8. The novel mechanical rock breaking and slotting device according to claim 7 is characterized in that: The slotting device housing (9) is provided with a first slot (14), a first slide groove (15) is provided in the first slot (14), a head connecting tube (8) is provided on the head pipe section (1), the head connecting tube (8) is plug-fitted with the first slide groove (15), a first slide block (18) is provided on the head connecting tube (8), the first slide block (18) is slidably fitted with the first slide groove (15), and the first slide block (18) is telescopically arranged along the radial direction of the head connecting tube (8).

9. The novel mechanical rock breaking and slotting device according to claim 8 is characterized in that: The head connecting tube (8) is provided with a first fixing groove (19), the first sliding block (18) is a T-shaped sliding block, the T-shaped sliding block is slidably matched with the first fixing groove (19), a first fixing spring (20) is connected inside the first fixing groove (19), and the first sliding block (18) is connected to the first fixing spring (20); the tail connecting tube (7) is provided with a second fixing groove (22), the second sliding block (21) is a T-shaped sliding block, the T-shaped sliding block is slidably matched with the second fixing groove (22), a second fixing spring (23) is connected inside the second fixing groove (22), and the second sliding block (21) is connected to the second fixing spring (23).

10. The novel mechanical rock breaking and slotting tool according to any one of claims 1 to 9, characterized in that: The tail joint (3) is provided with a drill rod connecting hole (10) for connecting a drill rod of a drilling rig.

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