Drilling box with clamping function and used for automatic drill rod continuing technology and method of drilling box

Abstract

The invention discloses a drill box with a clamping function and used for an automatic drill rod continuing process and a method of the drill box. The drilling box comprises a drilling box motor, a drilling box water jacket shaft, an outer barrel and a clamping rod mechanism, and the lower end of the drilling box water jacket shaft is connected with the drilling box motor; a blind hole is formed in the upper end of the drill box water jacket shaft to form a drill rod connecting end, and a drill rod is assembled; the outer cylinder is connected with a fixed part of the drilling box motor; the clamping rod mechanism comprises a clamping rod power driving mechanism and a clamping assembly; a through groove is formed in the position, corresponding to the clamping assembly, of the drilling box water jacket shaft. Under the action of the clamping rod power driving mechanism, the clamping head of the clamping assembly can penetrate through the through groove and clamp the drill rod or retreat from the through groove and loosen the drill rod. Therefore, when the drill rod continuing process or the drill rod withdrawing process is carried out, the drill rod is clamped by the rod clamping mechanism firstly, and then the corresponding drill rod continuing operation or the corresponding drill rod withdrawing operation is carried out. Therefore, the efficiency of connecting the drill rod can be improved, and the rod falling accident in the operation of withdrawing the drill rod can be completely eradicated.

Description

Technical Field

[0001] The invention relates to a drill box with a clamping function for automatically connecting drill rods, belonging to the technical field of underground coal mine tunnel support. Background Art

[0002] At present, the support automation level of underground coal mine tunnels is not high, and airborne anchor drill racks or single drilling rigs are often used for support, such as Figure 1 、 2 As shown, the existing drilling box consists of a drilling box motor 1, a cylinder I2, a drilling box water jacket I3, a drilling box water jacket shaft I4, bearings, seals, etc. When drilling an anchor hole, the drilling process is usually as follows: 1. First, manually or mechanically insert the first anchor hole. Figure 9 As shown in the figure, the tail of the outer hexagonal drill rod 1 with the drill bit installed is inserted into the inner hexagonal hole of the drill box; 2. The drill box motor is started, the piston rod of the feed cylinder is extended, and the drill box moves upward to drill the first drill rod 1. In this process, due to the gap between the outer hexagonal drill rod 1 and the inner hexagonal hole of the drill box, there are continuous small collisions between the two during the drilling process, which produces a large noise and shortens the service life of the drill box water jacket shaft 1; 3. The drill box motor is turned off; 4. The drill clamping mechanism clamps the tail of the first drill rod 1; 5. The piston rod of the feed cylinder is retracted and the drill box moves downward to the lowest position; 6. The tail of the second drill rod 1 is inserted manually or by a robot. The inner hexagonal hole of the drill box is inserted; 7. The drill box motor is started, the piston rod of the feed cylinder is extended, the drill box moves upward, and the top of the second drill rod 1 is fastened to the tail of the first drill rod 1 by a threaded connection. Due to the gap between the outer hexagonal drill rod 1 and the inner hexagonal hole of the drill box, there is a certain swing amplitude at the top of the second drill rod 1, which makes it difficult to align the position when the top of the second drill rod 1 is threadedly connected to the tail of the first drill rod, thereby reducing the efficiency of connecting the drill rods; 8. The piston rod of the feed cylinder continues to extend, and the second drill rod 1 is drilled under the drive of the drill box motor; 9. The third and fourth drill rods 1 are drilled in the same process until the required depth is reached.

[0003] The drill rod withdrawal process is usually as follows: 1. The drill box motor rotates in the opposite direction, the feed cylinder piston rod retracts, and drives the connected drill rods I (such as Figure 12 1. Remove the drill rod 1 from the hole. During this process, there is a certain risk of the drill rod falling out, which will threaten the safety of the operator; 2. Turn off the drill box motor; 3. The drill clamping mechanism clamps the bottom of the second-to-last drill rod 1; 4. The drill rig motor rotates in the opposite direction, and the piston rod of the feed cylinder continues to retract. The connecting thread between the first-to-last drill rod 1 and the second-to-last drill rod 1 is loosened. During this process, there is a certain risk of the drill rod falling out, which will threaten the safety of the operator; 5. Remove the drill rod 1 manually or by a robot and put it back into the drill rod magazine; 6. Use the same process to put the second and third drill rods 1 back into the drill rod magazine until all the drill rods 1 are removed and put back into the drill rod magazine.

[0004] As can be seen from the drilling process flow above, the gap between the outer hexagonal drill rod (I) and the hexagonal hole in the drill box generates a lot of noise during drilling, which shortens the service life of the drill box water jacket shaft (I). Furthermore, during the process of connecting drill rods, it is difficult to align the positions, which reduces the efficiency of connecting drill rods. The process flow for withdrawing the drill rod also shows that conventional drill boxes carry a certain risk of rod falling out during the process, posing a threat to operator safety. Summary of the Invention

[0005] The technical purpose of the present invention is to provide a drill box with a clamping function for automatically connecting drill rods, so as to solve the problems existing in the existing drilling process, drill rod connecting process and drill rod withdrawing process.

[0006] In order to achieve the above technical objectives, the present invention will adopt the following technical solutions:

[0007] A drill box with a clamping function for automatically connecting drill rods, comprising a drill box motor, a drill box water-jacketed shaft, an outer cylinder, and a rod clamping mechanism. The drill box water-jacketed shaft is placed inside the outer cylinder and arranged along the central axis of the outer cylinder. The lower end of the drill box water-jacketed shaft is a power input end connected to the power output end of the drill box motor. A hole is provided at the upper end of the drill box water-jacketed shaft to form a drill rod connecting end, and a drill rod is assembled thereon. The outer cylinder is connected to the fixed part of the drill box motor. The rod clamping mechanism comprises a rod clamping power drive mechanism and a clamping assembly.

[0008] The fixed part of the clamping rod power drive mechanism is connected to the outer cylinder, and the power output end is connected to the clamping assembly;

[0009] The drill box water jacket shaft is provided with a through groove at a position corresponding to the clamping assembly;

[0010] Under the power action of the clamping rod power drive mechanism, the clamping head of the clamping assembly can pass through the through slot and clamp the drill rod or exit the through slot and release the drill rod.

[0011] Preferably, the clamping assembly includes a return spring, a wedge-shaped clamping block and a wedge-shaped clamping cylinder; the clamping rod power drive mechanism is a reciprocating linear movement mechanism;

[0012] The outer wall of the wedge-shaped clamping cylinder is sealed with the cylinder, and the inner wall is arranged in three sections as a whole, corresponding to the first to third inner wall segments; the inner diameter of the first inner wall segment matches the outer diameter of the drill box water jacket shaft and is sleeved on the outer periphery of the drill box water jacket shaft; the inner diameter of the second inner wall segment is larger than the outer diameter of the drill box water jacket shaft, so that a step surface is formed between the first and second inner wall segments; the third inner wall segment is configured as an inner conical surface as a whole;

[0013] The wedge-shaped clamping block includes two or more clamping block parts that are evenly distributed in the circumferential direction; the drill box water jacket shaft is provided with a through groove at a position corresponding to each clamping block part; the clamping block part is the clamping head;

[0014] The outer wall surface of each clamping block is configured as an outer cone; the outer cone matches the shape of the inner cone and is in close contact with the inner cone; the inner wall of each clamping block is configured as a boss that matches the through groove;

[0015] The return spring is placed in the annular space enclosed by the second inner wall segment and the drill rod, and the two ends of the return spring in the elastic expansion direction respectively correspond to the step surface and one end surface of the wedge-shaped clamping block; the other end surface of the wedge-shaped clamping block is connected to the power output end of the reciprocating linear motion mechanism;

[0016] Driven by the power of the reciprocating linear motion mechanism, the wedge-shaped clamping block moves along the moving direction of the reciprocating linear motion mechanism, and under the guiding effect of the cooperation between the inner conical surface and the outer conical surface and the elastic force provided by the return spring, the boss can pass through the through groove and clamp the drill rod / exit the through groove and release the drill rod.

[0017] Preferably, the reciprocating linear motion mechanism is a hydraulic cylinder comprising a cylinder sleeve, a piston and a cylinder barrel;

[0018] One end of the cylinder is butted against the mouth of the outer cylinder, and the other end is sealed by the cylinder cover. A water jacket shaft through-hole A is provided at the bottom of the cylinder, and a water jacket shaft through-hole B is provided at a position corresponding to the water jacket shaft through-hole on the cylinder cover. The drill box water jacket shaft passes through water jacket shaft through-hole A and water jacket shaft through-hole B in sequence.

[0019] One end of the piston is assembled in the cylinder barrel through the cylinder sleeve, and the other end is adjacent to the wedge-shaped clamping block; the cylinder sleeve and the cylinder barrel are connected by an anti-twist pin;

[0020] The outer wall of the wedge-shaped clamping cylinder is sealed with the cylinder;

[0021] When hydraulic oil is filled into the cylinder, the piston drives the wedge-shaped clamping block to move and overcome the elastic force of the return spring. At the same time, under the guidance of the cooperation between the inner cone surface and the outer cone surface, the boss is forced to pass through the through groove until the wedge-shaped clamping block clamps the drill pipe and stops the input of hydraulic oil.

[0022] When the oil drain port of the cylinder is opened, the wedge-shaped clamping block pushes the piston to squeeze the hydraulic oil of the cylinder out of the oil drain port under the restoring force of the reset spring. At the same time, under the guiding action of the cooperation between the inner conical surface and the outer conical surface, the boss is forced to withdraw from the through groove, and the wedge-shaped clamping block releases the drill rod.

[0023] Preferably, an annular gap exists between the wedge-shaped clamping cylinder and the piston;

[0024] The side wall of the cylinder is respectively penetrated with a clamping rod mechanism flushing water inlet and a clamping rod mechanism flushing water outlet, and the clamping rod mechanism flushing water inlet and the clamping rod mechanism flushing water outlet are respectively communicated with the annular gap between the wedge-shaped clamping cylinder and the piston;

[0025] The outer wall of the wedge-shaped clamping cylinder is sealed to the cylinder; the piston is sealed to the cylinder and the drill box water jacket shaft respectively.

[0026] Preferably, a sealing connection is achieved between the outer wall of the wedge-shaped clamping cylinder and the cylinder barrel via multiple sealing rings.

[0027] Preferably, a first friction reducing plate is arranged on the surface of the piston that contacts the wedge-shaped clamping block.

[0028] Preferably, a second friction reducing plate is arranged on the surface of the wedge-shaped clamping cylinder in contact with the cylinder head; the inner wall of the second friction reducing plate is in close contact with the drill box water jacket shaft, and the outer wall is in contact with the inner wall of the cylinder.

[0029] Preferably, the return spring is connected to the wedge-shaped clamping block via a shim plate.

[0030] Another technical object of the present invention is to provide a method for automatically connecting drill rods using the aforementioned drill box with a clamping function, including a process flow for automatically connecting drill rods, specifically comprising the following steps:

[0031] Step 1.1: After installing the first drill rod at the drill rod connection end of the drill box water jacket shaft, start the hydraulic cylinder to supply oil to the cylinder inlet. Under the action of the hydraulic oil, the piston moves upward, pushing the wedge clamping block upward. The outer conical surface of the wedge clamping block is pressed against the inner conical surface of the wedge clamping cylinder. Under the action of force, the wedge clamping block is pushed along the conical surface toward the center of the drill rod. The boss on the inner side of the wedge clamping block passes through the through groove on the drill box water jacket shaft and clamps the first drill rod.

[0032] Step 1.2: Start the drill box motor to drive the drill box water jacket shaft to rotate the first drill rod. The feed cylinder piston rod extends, pushing the drill box upward to drill the first drill rod.

[0033] Step 1.3: Shut down the drill box motor, stop supplying oil to the hydraulic cylinder's oil inlet, and the return spring's elastic force pushes the wedge-shaped clamping block, driving the piston downward, until the bottom of the piston presses against the cylinder barrel and stops. During this process, the wedge-shaped clamping block moves along the inner conical surface of the wedge-shaped clamping barrel, away from the center of the first drill rod. The boss inside the wedge-shaped clamping block exits the through-slot on the drill box water jacket shaft, releasing the first drill rod.

[0034] Step 1.4: The feed cylinder piston rod retracts, the drill box returns to its lowest position, and the drill rod magazine rotates, moving the second drill rod to the rod removal position of the upper and lower manipulators. Under the action of the manipulator rod clamping cylinder, the manipulators grasp the second drill rod. Under the action of the manipulator position-changing cylinder, the upper and lower manipulators rotate to the rod installation position, and the drill box moves forward to align with the second drill rod. Oil is supplied to the oil inlet of the hydraulic cylinder to clamp the first drill rod.

[0035] Step 1.5: Start the drill box motor, extend the feed cylinder piston rod, push the drill box upward, tighten the top of the second drill rod to the tail of the first drill rod through a threaded connection, and continue to extend the feed cylinder piston rod to drill the second drill rod;

[0036] Repeat steps 1.3 to 1.5 until all drill rods are docked.

[0037] Furthermore, the method also includes a drill rod withdrawal process, which specifically includes the following steps:

[0038] Step 2.1. Supply oil to the oil inlet of the hydraulic cylinder. The boss on the inner side of the wedge-shaped clamping block passes through the through groove on the water jacket shaft of the drill box to clamp the drill rod.

[0039] Step 2.2: The drill box motor rotates in the reverse direction, the feed cylinder piston rod retracts, the drill box moves away from the rock wall to the target position, and the drill box motor is turned off.

[0040] Step 2.3: The drill clamping mechanism clamps the bottom of the second-to-last drill rod;

[0041] Step 2.4: The drill box motor rotates in the opposite direction, the feed cylinder piston rod continues to retract, and the connecting thread between the first drill rod and the second drill rod is loosened;

[0042] Step 2.5: Turn off the drill box motor, remove the boss on the inner side of the wedge-shaped clamping block from the through-slot on the drill box water jacket shaft, and loosen the drill rod;

[0043] Step 2.6: Use the upper and lower manipulators to take out the last drill rod and put it back into the drill rod bin;

[0044] Repeat steps 2.1-2.6 until all drill rods are removed.

[0045] Based on the above technical objectives, the present invention has the following advantages over the prior art:

[0046] 1. The drill box of the present invention is equipped with a rod clamping mechanism, so that when implementing the drill rod connection process or the drill rod withdrawal process, the drill rod is first clamped by the rod clamping mechanism, and then the corresponding drill rod connection or drill rod withdrawal operation is carried out. As can be seen, the present invention can ensure the accurate positioning of the drill rod in the drill box during the drill rod connection operation, promote the alignment of the drill rod connected to the drill box, and improve the efficiency of the drill rod connection; the present invention can ensure that the connecting thread between the drill rods is reversed and loosened during the drill rod withdrawal operation, eliminating the risk of rod falling out.

[0047] 2. The clamping rod mechanism of the present invention includes a wedge-shaped clamping cylinder, a wedge-shaped clamping block and a return spring, which can provide sufficient clamping force required for drilling.

[0048] 3. In order to ensure the flow and pressure of drilling water discharge, flushing water channels are left on the drilling rig water jacket and the drill pipe water jacket shaft, and multiple lip seals are designed on the drilling rig water jacket to ensure the sealing life.

[0049] 4. In order to ensure that the slag falling into the gap between the drill rod and the drill rod water jacket shaft is discharged smoothly, flushing ports are opened in the middle and lower part of the clamping rod mechanism to ensure the internal cleanliness of the clamping rod mechanism and to ensure the service life of the clamping rod mechanism.

[0050] 5. To ensure that the wedge-shaped clamping block rotates with the drill rod, a friction-reducing plate is installed between the wedge-shaped clamping block and the piston to increase the service life of the clamping rod mechanism.

[0051] 6. The drill box of the present invention is equipped with a clamping rod mechanism, which can effectively improve the noise problem during the drilling process: (1) Without the clamping rod mechanism, there is a gap between the drill rod and the drill rod mounting hole on the water jacket shaft. At a speed of 500r / min, the noise generated by the collision between the two is very loud. (2) With the clamping rod mechanism, there is a certain amount of noise during the short process of clamping the drill rod. After clamping the drill rod, the noise between the drill rod and the water jacket shaft is basically eliminated during the drilling process. In general, these noises are more obvious during idling and before drilling. After drilling begins, the noise is masked by the noise of the drill bit drilling into the rock / coal body.

[0052] In summary, the drill box with a clamping function for automatic drill rod splicing provided by the present invention provides sufficient clamping force for the drill rods. After drilling is completed, the connecting threads between the drill rods are loosened before the handle is manipulated to release the hexagonal drill rods. The provision of a flushing water channel ensures internal cleanliness of the clamping mechanism, extending its service life. The provision of multiple lip seals also extends seal life. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural diagram of an existing drilling box;

[0054] Figure 2 It is a structural schematic diagram of an existing drill box equipped with a drill rod I;

[0055] Figure 1-2 Middle: 1. Drill box motor, 2. Cylinder I, 3. Drill box water jacket I, 4. Drill box water jacket shaft I;

[0056] Figure 3 This is a structural diagram of a drill box with a clamping function for automatically connecting drill rods according to the present invention;

[0057] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle drill pipe I in the clamped state;

[0058] Figure 5 yes Figure 3 When the middle drill pipe I is in the loose state and the automatic connecting rod is completed;

[0059] Figure 6 yes Figure 3 Front view of the middle wedge clamping block;

[0060] Figure 7 yes Figure 3 Top view of the middle wedge clamping block;

[0061] Figure 8 It is a structural diagram of drill pipe I;

[0062] Figure 9 This is a schematic diagram of the structure of the drill rod I on which the drill bit is installed;

[0063] Figure 10 It is a structural diagram of drill pipe II;

[0064] Figure 11 This is a structural diagram of the drill rod II with the drill bit and connecting sleeve installed.

[0065] Figure 12 This is a schematic diagram of the structure of the drill pipe I after connection;

[0066] Figure 13 It is a structural diagram of drill pipe II after connection.

[0067] Figure 3-13 In: 1. Drill box motor, 5. Drill rod I, 6. Drill bit, 7. Thrust bearing, 8. Deep groove ball bearing, 9. Outer cylinder, 10. Anti-twist pin, 11. Cylinder liner, 12. Piston, 13. Wedge clamping block, 14. Wedge clamping cylinder, 15. Return spring, 16. Cylinder head, 17. Drill box water jacket shaft, 18. Friction reducing plate, 19. Snap ring, 20. Shim, 21. Cylinder barrel, 22. Retaining ring I, 23. Drill box water jacket, 24. Retaining ring II, 25. Retaining ring III. DETAILED DESCRIPTION

[0068] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way serves as any limitation on the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention. Unless otherwise specified, the relative arrangement of components and steps, expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered part of the specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values.

[0069] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations).

[0070] like Figure 3 As shown, the present invention provides a drill box with a clamping function for automatically connecting drill rods, comprising a drill box motor 1, an outer cylinder 9, a drill box water jacket shaft 17, and a clamping rod mechanism.

[0071] The drill box water jacket shaft 17 is arranged along the central axis of the outer cylinder 9; the lower end of the drill box water jacket shaft 17 is placed in the outer cylinder 9, and the lower end of the drill box water jacket shaft 17 is the power input end, which is connected to the power output end of the drill box motor 1. In the present invention, the power output end of the drill box motor 1 is connected to the internal spline provided at the lower end of the drill box water jacket shaft 17 via an external spline. When the drill box motor 1 rotates forward, the matching structure formed by the internal and external splines drives the drill box water jacket shaft 17 to rotate. A thrust bearing 7 is installed between the drill box motor 1 axially and the drill box water jacket shaft 17. The fixed part of the drill box motor 1 is docked with the lower end of the outer cylinder 9. In the present invention, the stopper of the drill box motor 1 is axially inserted into the outer cylinder 9 and fastened by bolts. The stopper end face is sealed by an O-ring with a retaining ring.

[0072] Two deep groove ball bearings 8 are installed between the drill box water jacket shaft 17 and the outer cylinder 9, corresponding to the first and second deep groove ball bearings; the upper end face of the thrust bearing 7 is pressed against the lower end face of the inner ring of the first deep groove ball bearing through the retaining ring II 24, and the lower end face of the outer ring of the first deep groove ball bearing is pressed against the end face of the drill box motor 1 through the retaining ring III 25. The upper end face of the outer ring of the first deep groove ball bearing is pressed against the drill box water jacket 23, and the upper end face of the inner ring of the first deep groove ball bearing is pressed against the drill box water jacket shaft 17. The drill box water jacket shaft 17 rotates around the drill box water jacket 23. Multiple rotating grid rings are installed between the drill box water jacket shaft 17 and the drill box water jacket 23. Multiple O-ring seals are installed between the drill box water jacket 23 and the outer cylinder 9 to prevent flushing water from entering the oil circuit from the water channel. The lower end surface of the inner ring of the second deep groove ball bearing is pressed against the drill box water jacket shaft 17, and the lower end surface of the outer ring of the second deep groove ball bearing is pressed against the drill box water jacket 23 through the retaining ring I 22 to position it.

[0073] A blind hole is provided in the upper end of the drill box water jacket shaft 17 to form a drill rod connecting end; the drill rod connecting end is equipped with a drill rod.

[0074] The clamping rod mechanism includes a clamping rod power drive mechanism and a clamping assembly; the fixed part of the clamping rod power drive mechanism is connected to the outer cylinder 9, and the power output end is connected to the clamping assembly; the drill box water jacket shaft 17 is provided with a through groove at a position corresponding to the clamping assembly; under the action of the clamping rod power drive mechanism, the clamping head of the clamping assembly can pass through the through groove and clamp the drill rod / exit the through groove and release the drill rod.

[0075] In the present invention, the clamping rod mechanism includes a wedge-shaped clamping block 13, a wedge-shaped clamping cylinder 14 and a return spring 15; the clamping rod power drive mechanism is a reciprocating linear motion mechanism; wherein:

[0076] The outer wall of the wedge-shaped clamping cylinder 14 is connected to the fixed part of the reciprocating linear motion mechanism, and the inner wall is arranged in three sections as a whole, corresponding to the first to third inner wall parts; the inner diameter of the first inner wall part matches the outer diameter of the drill box water jacket shaft and is sleeved on the periphery of the drill box water jacket shaft; the inner diameter of the second inner wall part is larger than the outer diameter of the drill box water jacket shaft, so that a step surface is formed between the first and second inner wall parts; the third inner wall part is set as an inner conical surface as a whole; the wedge-shaped clamping block 13 includes more than two clamping block parts evenly distributed in the circumferential direction; the drill box water jacket shaft is evenly distributed at the position corresponding to each clamping block part A through groove is provided; the clamping block split is the clamping head; the outer wall surface of each clamping block split is arranged into an outer cone; the outer cone matches the shape of the inner cone and is tightly attached to the inner cone; the inner wall of each clamping block split is provided with a boss matching the through groove; the return spring 15 is placed in the annular space formed by the second inner wall split and the drill rod, and at the same time, the two ends of the return spring 15 in the elastic expansion and contraction direction respectively correspond to the step surface and one side end surface of the wedge-shaped clamping block 13; the other side end surface of the wedge-shaped clamping block 13 is connected to the power output end of the reciprocating linear motion mechanism.

[0077] Driven by the power of the reciprocating linear motion mechanism, the wedge-shaped clamping block 13 moves along the moving direction of the reciprocating linear motion mechanism, and under the cooperative guiding action between the inner conical surface and the outer conical surface and the elastic force provided by the return spring 15, the boss can pass through the through groove and clamp the drill rod / exit the through groove and release the drill rod.

[0078] In the present invention, the reciprocating linear motion mechanism can be a hydraulic cylinder or a pneumatic cylinder. When it is a hydraulic cylinder, the compressed medium in the cylinder barrel 21 is hydraulic oil. When it is a pneumatic cylinder, the compressed medium in the cylinder barrel 21 is gas. In the accompanying drawings, the reciprocating linear motion mechanism provided is a hydraulic cylinder, including a cylinder sleeve 11, a piston 12 and a cylinder barrel 21; wherein:

[0079] One end of the cylinder barrel 21 butts against the mouth of the outer barrel, while the other end is sealed by the cylinder head. In the accompanying drawings, the stopper of the cylinder barrel 21 presses against the upper end face of the outer ring of the second deep groove ball bearing for positioning. The stopper of the cylinder barrel 21 penetrates the outer barrel 9 and is fastened to the upper end face of the outer barrel 9 by bolts. A water jacket shaft through-hole A is provided in the center of the cylinder barrel 21, and a water jacket shaft through-hole B is provided in the cylinder head at a position corresponding to the water jacket shaft through-hole. The drill box water jacket shaft passes through water jacket shaft through-hole A and water jacket shaft through-hole B in sequence. One end of the piston 12 is assembled in the cylinder barrel 21 through the cylinder sleeve 11, while the other end is adjacent to the wedge-shaped clamping block. The cylinder sleeve 11 and the cylinder barrel 21 are connected by an anti-twist pin to prevent axial movement and rotation of the cylinder sleeve 11. The outer wall of the wedge-shaped clamping barrel is sealed to the cylinder barrel 21. In the present invention, a piston rod guide ring, a piston rod seal, and a dustproof seal are installed between the cylinder liner 11 and the piston 12. The drill box water jacket shaft 17 penetrates the inner hole of the piston 12. A dustproof seal is installed between the piston 12 and the drill box water jacket shaft 17. A dustproof seal is installed between the cylinder barrel 21 and the drill box water jacket shaft 17. A piston guide ring and a piston seal are installed between the piston 12 and the cylinder barrel 21.

[0080] When hydraulic oil is filled into the cylinder 21, the piston 12 drives the wedge-shaped clamping block to move and overcomes the elastic force of the return spring. At the same time, under the cooperative guiding action between the inner conical surface and the outer conical surface, the boss is prompted to pass through the through groove until the wedge-shaped clamping block clamps the drill rod and stops the input of hydraulic oil; when the oil drain port of the cylinder 21 is opened, the wedge-shaped clamping block, under the action of the restoring force of the return spring, pushes the piston 12 to squeeze the hydraulic oil in the cylinder 21 out of the oil drain port. At the same time, under the cooperative guiding action between the inner conical surface and the outer conical surface, the boss is prompted to withdraw from the through groove, and the wedge-shaped clamping block releases the drill rod.

[0081] The friction-reducing plate 18 is a two- or three-part structure. In the accompanying drawings, it consists of two components, designated the first and second friction-reducing plates. The first friction-reducing plate is located on the surface where the piston 12 contacts the wedge-shaped clamping block 13. This ensures that the wedge-shaped clamping block 13 rotates with the drill rod, extending the service life of the clamping mechanism. The second friction-reducing plate is located on the surface where the wedge-shaped clamping tube 14 contacts the cylinder head 16. The inner wall of the second friction-reducing plate abuts the drill box water jacket shaft 17, while the outer wall contacts the inner wall of the cylinder barrel 21.

[0082] The wedge-shaped clamping block 13 is a two-half or three-half structure. Figure 6 、 7 As shown in FIG. 2, 2 or 3 through grooves are correspondingly opened on the drill box water jacket shaft 17.

[0083] The snap ring 19 is used for axial limitation of the drill box water jacket shaft 17. A rotating grid ring is installed between the wedge-shaped clamping cylinder 14 and the cylinder barrel 21.

[0084] The working principle of the drill box with clamping function for automatic drill rod connection technology of the present invention is as follows:

[0085] 1. Process flow of drilling rod and connecting rod:

[0086] 1. Such as Figure 4 As shown, in this drill box, the following Figure 9 The drill rod Ⅰ5 with a drill bit 6 is shown, and oil is supplied to the oil inlet of the cylinder. Under the action of hydraulic oil, the piston 12 moves upward, pushing the friction reducing plate 18 and the wedge-shaped clamping block 13 to move upward. The outer conical surface of the wedge-shaped clamping block 13 is squeezed with the inner conical surface of the wedge-shaped clamping cylinder 14. Under the action of force, the wedge-shaped clamping block 13 is pushed along the conical surface toward the center of the drill rod Ⅰ5. The rectangular boss on the inner side of the wedge-shaped clamping block 13 passes through the through groove on the drill box water jacket shaft 17 to clamp the outer hexagon of the drill rod Ⅰ5.

[0087] 2. Start the drill box motor 1, which transmits torque through the spline connection, driving the drill box water jacket shaft 17 and the first drill rod Ⅰ5 to rotate. The feed cylinder piston rod extends, pushing the drill box upward and drilling into the first drill rod Ⅰ5.

[0088] 3. Such as Figure 5 As shown, the drill box motor 1 is shut down, and the oil supply to the cylinder inlet is cut off. The elastic force of the return spring 15 pushes the pad 20, wedge clamping block 13, friction reducing plate 18, and piston 12 downward until the bottom of the piston 12 presses against the cylinder barrel 21 and stops. The wedge clamping block 13 simultaneously moves along the tapered surface of the wedge clamping barrel 14, away from the center of the first drill rod 15. The rectangular boss inside the wedge clamping block 13 exits the through-slot on the drill box water jacket shaft 17, releasing the first drill rod 15.

[0089] 4. The piston rod of the feed cylinder is retracted, the drill box returns to the lowest position, and the drill rod compartment rotates. Figure 9 The drill rod Ⅰ5 shown is rotated to the upper and lower manipulator rod taking positions. Under the action of the manipulator rod clamping cylinder, the mechanic holds the drill rod Ⅰ5 tightly. Under the action of the manipulator position changing cylinder, the upper and lower manipulators are rotated to the rod installing position, and the drill box moves forward to align with the outer hexagon of the drill rod Ⅰ5. The oil is supplied to the oil inlet of the cylinder to clamp the outer hexagon of the drill rod Ⅰ5.

[0090] 5. Start the drill box motor 1, the feed cylinder piston rod extends, pushing the drill box upward, fastening the top of the second drill rod I to the tail of the first drill rod I through a threaded connection, and the feed cylinder piston rod continues to extend to drill the second drill rod I.

[0091] The same process is used to drill the third and fourth drill rods I until the required depth is reached. Figure 12 shown.

[0092] During drilling, water is supplied through the drilling flushing water inlet and the clamping rod mechanism flushing water inlet. The drilling flushing water reduces the temperature of the drill bit 6 and drill rod Ⅰ 5 and flushes coal and stone debris from the drill hole. The clamping rod mechanism flush flushes coal and stone debris that enter the gap between the drill rod and the drill box and out of the clamping rod mechanism, extending its service life.

[0093] 2. Drill rod withdrawal process:

[0094] 1. Oil is supplied to the oil inlet of the oil cylinder, and the rectangular boss on the inner side of the wedge-shaped clamping block 13 passes through the through groove on the drill box water jacket shaft 17 to clamp the outer hexagon of the drill rod Ⅰ5.

[0095] 2. The drill box motor 1 rotates in the opposite direction, the piston rod of the feed cylinder retracts, and the drill box moves away from the rock wall.

[0096] 3. Turn off the drill box motor 1.

[0097] 4. The drill clamping mechanism clamps the bottom of the second-to-last drill rod Ⅰ5.

[0098] 5. The drill box motor 1 rotates in the opposite direction, the piston rod of the feed cylinder continues to retract, and the connecting thread between the penultimate drill rod I and the penultimate drill rod I is loosened.

[0099] 6. Turn off the drill box motor 1, the rectangular boss inside the wedge-shaped clamping block 13 exits the through groove on the drill box water jacket shaft 17, and loosen the drill rod I 5.

[0100] 7. Use the upper and lower manipulators to take out drill rod I5 and put it back into the drill rod bin.

[0101] The same process is used to remove the second and third drill rods Ⅰ5 until all the drill rods are removed.

[0102] The drill box is suitable for all commonly used hexagonal drill rods. According to the hexagonal specifications of the drill rods, such as B19, B22, etc., the matching drill box water jacket shaft is selected. The automatic connecting rod drill box is also suitable for Figure 10 The drill rod II 26 is shown. Figure 11 As shown, the drill rod II 26 and the drill bit 6 are connected by a connecting sleeve 27 through a thread, and a thread fastening glue is used to prevent loosening. The drill rod II 26 is connected by a connecting sleeve 27 through a thread, and a thread fastening glue is used to prevent loosening. Figure 13 shown.

[0103] 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 and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A drill box with a clamping function for automatically connecting drill rods, comprising a drill box motor, a drill box water-jacketed shaft, and an outer cylinder. The drill box water-jacketed shaft is placed inside the outer cylinder and arranged along the central axis of the outer cylinder. The lower end of the drill box water-jacketed shaft is a power input end connected to the power output end of the drill box motor. The upper end of the drill box water-jacketed shaft is provided with a hole to form a drill rod connecting end, and is equipped with a drill rod. The outer cylinder is connected to the fixed part of the drill box motor. It is characterized in that: It also includes a clamping rod mechanism; the clamping rod mechanism includes a clamping rod power drive mechanism and a clamping assembly; The fixed part of the clamping rod power drive mechanism is connected to the outer cylinder, and the power output end is connected to the clamping assembly; The drill box water jacket shaft is provided with a through groove at a position corresponding to the clamping assembly; Under the power action of the clamping rod power drive mechanism, the clamping head of the clamping assembly can pass through the through slot and clamp the drill rod or exit the through slot and release the drill rod.

2. The drill box with clamping function for automatic drill rod connection according to claim 1, characterized in that: The clamping assembly includes a return spring, a wedge-shaped clamping block and a wedge-shaped clamping cylinder; the clamping rod power drive mechanism is a reciprocating linear movement mechanism; The outer wall of the wedge-shaped clamping cylinder is sealed with the cylinder, and the inner wall is arranged in three sections as a whole, corresponding to the first to third inner wall segments; the inner diameter of the first inner wall segment matches the outer diameter of the drill box water jacket shaft and is sleeved on the outer periphery of the drill box water jacket shaft; the inner diameter of the second inner wall segment is larger than the outer diameter of the drill box water jacket shaft, so that a step surface is formed between the first and second inner wall segments; the third inner wall segment is configured as an inner conical surface as a whole; The wedge-shaped clamping block includes two or more clamping block parts that are evenly distributed in the circumferential direction; the drill box water jacket shaft is provided with a through groove at a position corresponding to each clamping block part; the clamping block part is the clamping head; The outer wall surface of each clamping block is configured as an outer cone; the outer cone matches the shape of the inner cone and is in close contact with the inner cone; the inner wall of each clamping block is configured as a boss that matches the through groove; The return spring is placed in the annular space enclosed by the second inner wall segment and the drill rod, and the two ends of the return spring in the elastic expansion direction respectively correspond to the step surface and one end surface of the wedge-shaped clamping block; the other end surface of the wedge-shaped clamping block is connected to the power output end of the reciprocating linear motion mechanism; Driven by the power of the reciprocating linear motion mechanism, the wedge-shaped clamping block moves along the moving direction of the reciprocating linear motion mechanism, and under the guiding effect of the cooperation between the inner conical surface and the outer conical surface and the elastic force provided by the return spring, the boss can pass through the through groove and clamp the drill rod / exit the through groove and release the drill rod.

3. The drill box with clamping function for automatic drill rod connection according to claim 2, characterized in that: The reciprocating linear motion mechanism is a hydraulic cylinder, comprising a cylinder sleeve, a piston and a cylinder barrel; One end of the cylinder is butted against the mouth of the outer cylinder, and the other end is sealed by the cylinder cover. A water jacket shaft through-hole A is provided at the bottom of the cylinder, and a water jacket shaft through-hole B is provided at a position corresponding to the water jacket shaft through-hole on the cylinder cover. The drill box water jacket shaft passes through water jacket shaft through-hole A and water jacket shaft through-hole B in sequence. One end of the piston is assembled in the cylinder barrel through the cylinder sleeve, and the other end is adjacent to the wedge-shaped clamping block; the cylinder sleeve and the cylinder barrel are connected by an anti-twist pin; The outer wall of the wedge-shaped clamping cylinder is sealed with the cylinder; When the cylinder is filled with hydraulic oil, the piston drives the wedge-shaped clamping block to move and overcome the elastic force of the return spring. At the same time, under the guidance of the cooperation between the inner cone surface and the outer cone surface, the boss is forced to pass through the through groove until the wedge-shaped clamping block clamps the drill pipe. Stop the input of hydraulic oil; When the oil drain port of the cylinder is opened, the wedge-shaped clamping block pushes the piston to squeeze the hydraulic oil of the cylinder out of the oil drain port under the restoring force of the reset spring. At the same time, under the guiding action of the cooperation between the inner conical surface and the outer conical surface, the boss is forced to withdraw from the through groove, and the wedge-shaped clamping block releases the drill rod.

4. The drill box with clamping function for automatic drill rod connection according to claim 3, characterized in that: There is an annular gap between the wedge-shaped clamping cylinder and the piston; The side wall of the cylinder is respectively penetrated with a clamping rod mechanism flushing water inlet and a clamping rod mechanism flushing water outlet, and the clamping rod mechanism flushing water inlet and the clamping rod mechanism flushing water outlet are respectively communicated with the annular gap between the wedge-shaped clamping cylinder and the piston; The outer wall of the wedge-shaped clamping cylinder is sealed to the cylinder; the piston is sealed to the cylinder and the drill box water jacket shaft respectively.

5. The drill box with clamping function for automatic drill rod connection process according to claim 4 is characterized in that: The outer wall of the wedge-shaped clamping tube and the cylinder are sealed by multiple sealing rings.

6. The drill box with clamping function for automatic drill rod connection according to claim 4, characterized in that: The surface of the piston that contacts the wedge-shaped clamping block is provided with a first friction-reducing plate.

7. The drill box with clamping function for automatic drill rod connection according to claim 6, characterized in that: The surface of the wedge-shaped clamping cylinder in contact with the cylinder cover is provided with a second friction reducing plate; the inner wall of the second friction reducing plate is in close contact with the drill box water jacket shaft, and the outer wall thereof is in contact with the inner wall of the cylinder.

8. The drill box with clamping function for automatic drill rod connection according to claim 4, characterized in that: The return spring is connected to the wedge-shaped clamping block through a pad.

9. A method for automatically connecting drill rods using a drill box with a clamping function according to claim 3, characterized in that: The process flow of connecting rod includes the following steps: Step 1.1: After installing the first drill rod at the drill rod connection end of the drill box water jacket shaft, start the hydraulic cylinder to supply oil to the cylinder inlet. Under the action of the hydraulic oil, the piston moves upward, pushing the wedge clamping block upward. The outer conical surface of the wedge clamping block is pressed against the inner conical surface of the wedge clamping cylinder. Under the action of force, the wedge clamping block is pushed along the conical surface toward the center of the drill rod. The boss on the inner side of the wedge clamping block passes through the through groove on the drill box water jacket shaft and clamps the first drill rod. Step 1.2: Start the drill box motor to drive the drill box water jacket shaft to rotate the first drill rod. The feed cylinder piston rod extends, pushing the drill box upward to drill the first drill rod. Step 1.3: Shut down the drill box motor, stop supplying oil to the hydraulic cylinder's oil inlet, and the return spring's elastic force pushes the wedge-shaped clamping block, driving the piston downward, until the bottom of the piston presses against the cylinder barrel and stops. During this process, the wedge-shaped clamping block moves along the inner conical surface of the wedge-shaped clamping barrel, away from the center of the first drill rod. The boss inside the wedge-shaped clamping block exits the through-slot on the drill box water jacket shaft, releasing the first drill rod. Step 1.4: The feed cylinder piston rod retracts, the drill box returns to its lowest position, and the drill rod magazine rotates, moving the second drill rod to the rod removal position of the upper and lower manipulators. Under the action of the manipulator rod clamping cylinder, the manipulators grasp the second drill rod. Under the action of the manipulator position-changing cylinder, the upper and lower manipulators rotate to the rod installation position, and the drill box moves forward to align with the second drill rod. Oil is supplied to the oil inlet of the hydraulic cylinder to clamp the first drill rod. Step 1.5: Start the drill box motor, extend the feed cylinder piston rod, push the drill box upward, tighten the top of the second drill rod to the tail of the first drill rod through a threaded connection, and continue to extend the feed cylinder piston rod to drill the second drill rod; Repeat steps 1.3 to 1.5 until all drill rods are docked.

10. The method for automatically connecting drill rods with a drill box having a clamping function according to claim 9, characterized in that: It also includes the drill rod withdrawal process, which specifically includes the following steps: Step 2.

1. Supply oil to the oil inlet of the hydraulic cylinder. The boss on the inner side of the wedge-shaped clamping block passes through the through groove on the water jacket shaft of the drill box to clamp the drill rod. Step 2.2: The drill box motor rotates in the reverse direction, the feed cylinder piston rod retracts, the drill box moves away from the rock wall to the target position, and the drill box motor is turned off. Step 2.3: The drill clamping mechanism clamps the bottom of the second-to-last drill rod; Step 2.4: The drill box motor rotates in the opposite direction, the feed cylinder piston rod continues to retract, and the connecting thread between the first drill rod and the second drill rod is loosened; Step 2.5: Turn off the drill box motor, remove the boss on the inner side of the wedge-shaped clamping block from the through-slot on the drill box water jacket shaft, and loosen the drill rod; Step 2.6: Use the upper and lower manipulators to take out the last drill rod and put it back into the drill rod bin; Repeat steps 2.1-2.6 until all drill rods are removed.

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