Clamping unit of twist drill rod, twist drill rod taking-out device and twist drill rod taking-out method

Abstract

The invention provides a clamping unit of a twist drill rod, a twist drill rod taking-out device and a twist drill rod taking-out method, and relates to the field of twist drill rod taking-out, the adopted scheme is that the twist drill rod clamping unit comprises a push rod and further comprises a guide cylinder, and the guide cylinder and the end of the push rod are connected and coaxially arranged; the number of the clamping jaw assemblies is at least two, every two adjacent clamping jaw assemblies are not collinear, the distance between every two adjacent clamping jaw assemblies is smaller than the screw pitch of the twist drill rod, each clamping jaw assembly comprises a mounting base, the mounting bases are arranged on the inner wall of the guide cylinder, clamping jaws are arranged in the mounting bases, and torsion springs are connected between the clamping jaws and the inner walls of the mounting bases; the clamping jaws can swing under the action of blades of the twist drill rod, and the ends of the clamping jaws can abut against a rod body of the twist drill rod. And the hydraulic oil channel comprises an oil inlet channel and an oil return channel. The device can replace manual work to take out the fallen drill rod, the efficiency is high, and the risk is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of twist drill rod extraction, in particular to a twist drill rod clamping unit, a twist drill rod extraction device and an extraction method. BACKGROUND

[0002] The mine twist drill rod is a key tool for drilling operation in the coal mine, which is composed of a rod body made of high-strength alloy steel pipe, a T-shaped steel band blade spirally wound and welded, and a connecting joint at both ends. The spiral blade can efficiently discharge drill cuttings, and the joint realizes firm connection between drill rods or with a drill bit through threads, four squares or six squares, can transmit sufficient torque and axial force, and its size parameters are designed according to drilling requirements. The spiral diameter of the blade is commonly 26mm to 65mm, the pitch of the blade is generally between 50mm and 200mm, the diameter of the rod body corresponds to 16mm to 27mm, and the length of the rod body is different from 0.5m to 6m, which is suitable for different geological conditions and drill types. With excellent strength, toughness and chip removal performance, it is widely used in coal seam drilling, gas extraction and other operations, and is a core component to ensure drilling efficiency and safety. The mine twist drill rod is commonly used with a drill bit.

[0003] In the process of pressure relief drilling and drill cuttings method coal powder detection hole construction, the twist drill rod is increased by the drill to drill a hole. During drilling, the twist drill rod has the functions of transmitting torque and conveying coal powder. After the drilling reaches the designed depth, the drill rod is withdrawn together with the drill bit.

[0004] Due to the influence of factors such as self-weight stress, tectonic stress, coal column stress and mining stress, stress is concentrated in the coal body. During drilling, it is easy to cause the phenomenon of sticking drill. If the operator makes a mistake and does not firmly connect the connecting pin of the adjacent drill rod, or the connecting pin and the U-shaped pin fall off during drilling, the twist drill rod often falls off or breaks in the hole. The operator needs to unscrew the external drill rod and use a shovel and other tools to recover the hole. The recovery efficiency is low, which greatly affects the construction efficiency and has safety hazards. SUMMARY

[0005] In order to solve the technical problem that the twist drill rod falling in the hole is difficult to extract in the prior art, the present application provides a twist drill rod clamping unit, a twist drill rod extraction device and an extraction method, which can replace manual extraction of the falling drill rod, has high efficiency and low risk.

[0006] In a first aspect, the present application provides a twist drill rod taking-out device to solve the above technical problems, comprising a pushing rod, further comprising: a guide cylinder coaxially arranged with the end of the pushing rod; a jaw assembly, at least two of which are arranged, the adjacent two jaw assemblies are not collinear, the distance between the adjacent jaw assemblies is less than the pitch of the twist drill rod, the jaw assembly comprises a mounting seat arranged on the inner wall of the guide cylinder, a clamping jaw is arranged in the mounting seat, a torsion spring is connected between the clamping jaw and the inner wall of the mounting seat, the clamping jaw can swing under the action of the blade of the twist drill rod, and the end of the clamping jaw can abut against the rod body of the twist drill rod; a hydraulic oil channel comprising an oil inlet and an oil return, the oil inlet and the oil return are arranged in the inner wall of the guide cylinder, the guide cylinder further comprises a containing cavity, the opening of the containing cavity faces the inside of the guide cylinder, the containing cavity is in communication with the oil inlet and the oil return respectively, the mounting seat is arranged in the containing cavity and can move axially in the containing cavity, a limiting boss is arranged at the opening of the containing cavity, and a sealing ring is arranged between the mounting seat and the limiting boss.

[0007] The present application realizes hydraulic clamping and rotary taking-out of the falling twist drill rod through the cooperation of the guide cylinder, the jaw assembly and the hydraulic oil channel, so that the coal powder and rock blocks in the drill hole can move out of the hole along with the twist drill rod, the resistance of the coal powder and rock blocks in the drill hole is reduced, the jaw assembly is prevented from separating from the twist drill rod, the rod taking-out is effectively realized, the efficiency is high, and there is no risk.

[0008] Further, a rotating shaft is vertically arranged in the mounting seat, the rotating shaft penetrates the lower part of the clamping jaw, the clamping jaw can rotate relative to the rotating shaft, the torsion spring comprises an elastic part, two ends of the elastic part are respectively connected with support parts, one of the support parts is connected with the clamping jaw, and the other support part abuts against the inner wall of the mounting seat, and the elastic part is rotationally connected with the mounting seat.

[0009] Further, in the direction of the guide cylinder extending into the drill hole, the clamping jaw is arranged at the front part of the mounting seat and close to the limiting boss.

[0010] The present application can make the limiting boss play a limiting role on the clamping jaw by arranging the clamping jaw close to the limiting boss, avoid reverse swinging of the clamping jaw under the action of resistance when the twist drill rod is pulled out, and avoid inefficient power transmission and slippage.

[0011] Further, a guide inclined surface is arranged at the front part of the clamping jaw, and the inclination angle of the guide inclined surface is the same as the helix angle of the twist drill rod.

[0012] The present application can reduce the angle of the clamping jaw swinging when the clamping jaw is pushed to the blade of the twist drill rod, and further reduce the pushing resistance in the clamping process by setting the guide inclined surface.

[0013] Further, the end of the clamping jaw is provided with an arc-shaped groove, which can abut the rod body of the twist drill rod.

[0014] The present application can increase the contact area with the rod body of the twist drill rod and enhance the clamping stability by setting the arc-shaped groove.

[0015] Further, the mounting seat is further provided with a guide ring, which is in contact with the accommodating cavity and generates sliding friction.

[0016] The present application can enhance the stability of the mounting seat movement by the guide ring, and avoid skewing.

[0017] Further, the hydraulic oil channel further comprises a fluid slip ring, which is arranged at the end of the pushing rod, the output end of the fluid slip ring is in communication with the oil inlet channel, the oil return end of the fluid slip ring is in communication with the oil return channel, and the input end of the fluid slip ring is used for communication with the oil supply assembly.

[0018] The present application can avoid the oil pipe from being twisted and entangled when the pushing rod rotates by setting the fluid slip ring.

[0019] Further, the surface of the limiting boss close to the clamping jaw is provided with a proximity switch, and the hydraulic oil channel is provided with a pressure sensor.

[0020] The present application can know the movement condition of the clamping jaw by the proximity switch and the pressure sensor, and judge whether the twist drill rod is clamped.

[0021] In the second aspect, the present application further provides a twist drill rod taking-out device, which comprises a moving seat and a controller, and further comprises the above-mentioned twist drill rod clamping unit, the moving seat is rotatably provided with an adjusting plate through a hinged seat, an adjusting oil cylinder is connected between the adjusting plate and the moving seat, the adjusting plate is movably provided with a moving plate, the moving direction of the moving plate is parallel to the length direction of the pushing rod, a motor one is arranged on the moving plate, the motor one drives the pushing rod to rotate, the moving seat is further provided with an oil supply assembly, the oil supply assembly is in communication with the hydraulic oil channel, and the proximity switch and the pressure sensor are electrically connected with the controller.

[0022] The present application can adjust the drilling direction by the adjusting plate, and meet the requirements of taking out the drill in various situations.

[0023] In the third aspect, the present application further provides a twist drill rod taking-out method, which adopts the above-mentioned twist drill rod taking-out device, and comprises the following steps: S01: adjust the inclination angle of the adjusting plate to be consistent with the drilling direction; S02: push the push rod into the drill hole, and send the guide cylinder into the fallen twist drill; S03: continuously push the guide cylinder to the twist drill rod until the controller determines that the jaw is clamped with the blade of the twist drill rod through the signal sent by the proximity switch; S04: control the jaw to extend until the pressure sensor monitors that the pressure exceeds the set threshold; S05: control the push rod to rotate and at the same time control the moving plate to move reversely until the moving plate moves reversely to the initial position, at this time the twist drill rod is exposed from the drill hole; S06: after oil return, pull out the twist drill rod.

[0024] The twist drill rod is taken out by rotating and pulling back, the coal powder, rock blocks and other materials in the drill hole can be discharged, the force for taking the drill rod is reduced, and the reliability is improved.

[0025] From the above technical solution, the present application has the following advantages: The present application provides a twist drill rod clamping unit, a twist drill rod taking-out device and a taking-out method, through the cooperation of the guide cylinder, the jaw assembly and the hydraulic oil channel, the hydraulic clamping and rotating taking-out of the fallen twist drill rod are realized, in this way, the coal powder, rock blocks and other materials in the drill hole can move out of the hole along with the twist drill rod, the resistance effect of the coal powder, rock blocks and other materials in the drill hole is reduced, the jaw assembly is prevented from separating from the twist drill rod, the rod taking-out is effectively realized, the efficiency is high, and there is no risk; the limit effect of the limit boss on the jaw is achieved by setting the jaw close to the limit boss, the jaw is prevented from swinging reversely under the resistance when the twist drill rod is pulled out, the power transmission is not efficient, and the sliding phenomenon is avoided; the swinging angle of the jaw is reduced when the jaw advances to the blade of the twist drill rod by setting the guide slope, and then the advancing resistance in the clamping process is reduced; the contact area with the rod body of the twist drill rod is increased by setting the arc-shaped groove, and the clamping stability is enhanced; the stability of the mounting seat movement is enhanced by the guide ring, and the skew is avoided; the oil pipe is prevented from being entangled when the push rod rotates by setting the fluid slip ring; whether the jaw clamps the twist drill rod is determined by the proximity switch and the pressure sensor; the drilling direction is adjusted by the adjusting plate to meet the drilling requirements in various situations; the twist drill rod is taken out by rotating and pulling back, the coal powder, rock blocks and other materials in the drill hole can be discharged, the force for taking the drill rod is reduced, and the reliability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the present application, the drawings required to be used in the description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0027] Figure 1 Structure diagram of the present application after removing the track in the second embodiment Figure 1 .

[0028] Figure 2 Assembly structure diagram of the guide cylinder and the jaw assembly in the first embodiment of the present application Figure 1 .

[0029] Figure 3 Assembly structure diagram of the guide cylinder and the jaw assembly in the first embodiment of the present application Figure 2 .

[0030] Figure 4 Structure diagram of the jaw assembly in the first embodiment of the present application

[0031] Figure 5 Structure diagram of the present application after removing the track in the second embodiment Figure 2 .

[0032] Figure 6 Hydraulic principle diagram in the second embodiment of the present application

[0033] In the figure, 1 is a guide cylinder, 2 is a pushing rod, 3 is a gear ring, 4 is a fluid slip ring, 5 is a moving plate, 6 is a hinged seat, 7 is a moving seat, 8 is an extension leg, 9 is an oil tank, 10 is an oil pump, 11 is a pressure sensor, 12 is an oil return flow divider, 13 is a rack, 14 is a filter, 15 is a motor, 16 is a jaw, 1601 is an arc-shaped groove, 1602 is a guide inclined surface, 17 is a proximity switch, 18 is a containing cavity, 19 is a limiting boss, 20 is an oil inlet channel, 21 is an oil return channel, 22 is a guide ring, 23 is a sealing ring, 24 is a rotating shaft, 25 is a torsion spring, 2501 is a supporting part, 2503 is an elastic part, 26 is a mounting seat, 27 is a limiting plate, 28 is a solenoid valve, 29 is an oil inlet flow divider, 30 is an oil return pipe, 31 is an oil inlet pipe, 32 is an adjusting plate, 33 is a jaw assembly, 34 is an adjusting oil cylinder, and 35 is an oil supply assembly. EMBODIMENT

[0034] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent. Specific implementation method 1 like Figures 1 to 4 As shown, this specific embodiment provides a clamping unit for a twist drill rod, including a push rod 2, a guide cylinder 1, a clamping jaw assembly 33, and a hydraulic oil channel, wherein the guide cylinder 1 is connected to the end of the push rod 2 and is coaxially arranged; the clamping jaw assembly 33 is provided with at least two, and the two adjacent clamping jaw assemblies 33 are not colinear, and the spacing between adjacent clamping jaw assemblies 33 is smaller than the pitch of the twist drill rod, and the clamping jaw assembly 33 includes a mounting seat 26, and the mounting seat 26 is provided with a claw 16, and a torsion spring 25 is connected between the claw 16 and the inner wall of the mounting seat 26, and the claw 16 can swing under the action of the blade of the twist drill rod, and the claw 16 can be reset under the action of the torsion spring 25, thereby realizing the clamping of the blade by the clamping jaw assembly 33, and realizing power transmission after clamping, the end of the claw 16 can abut against the rod body of the twist drill rod; the hydraulic oil channel includes The oil inlet passage 20 and the oil return passage 21 can deliver hydraulic oil of a set pressure to push the mounting seat 26 to move. The oil inlet passage 20 and the oil return passage 21 are arranged in the inner wall of the guide cylinder 1. The inner wall of the guide cylinder 1 is also provided with an accommodating chamber 18. The opening of the accommodating chamber 18 faces the inside of the guide cylinder 1. The accommodating chamber 18 is communicated with the corresponding oil inlet passage 20 and the oil return passage 21 respectively. The mounting seat 26 is arranged in the corresponding accommodating chamber 18 and can move axially in the accommodating chamber 18. An oil chamber is formed by the accommodating chamber 18, which can push the mounting seat 26 to move so that the claw 16 clamps the rod body of the twist drill rod. A limiting boss 19 is provided at the opening of the accommodating chamber 18. The limiting boss 19 prevents the mounting seat 26 from moving too far. A sealing ring 23 is provided between the mounting seat 26 and the limiting boss 19. The sealing effect of the sealing ring 23 prevents leakage of hydraulic oil.

[0036] The specific embodiment realizes hydraulic clamping and rotating taking out of the fallen twist drill rod through cooperation of the guide cylinder 1, the jaw assembly 33 and the hydraulic oil channel. In this way, the coal powder and rock blocks in the drill hole can move out of the hole along with the twist drill rod rotating and moving axially, the resistance effect of the coal powder, rock blocks and the like in the drill hole is reduced, the pawl 16 assembly is prevented from separating from the twist drill rod, the rod taking is effectively realized, the efficiency is high compared with the existing technology of using manual digging, and there is no operation risk; compared with using a tool to be connected with the rod body in a threaded manner and then being pulled out, the specific embodiment greatly reduces the resistance effect, improves the connection reliability of the device and the twist drill rod, and greatly reduces the resistance effect.

[0037] As shown in Figure 2 In the specific embodiment, three jaw assemblies 33 are arranged, which are distributed on the same cross section of the guide cylinder 1, so that the clamping force on the drill rod can be enhanced, and slipping can be avoided.

[0038] As shown in Figure 3 In the specific embodiment, a rotating shaft 24 is vertically arranged in the mounting seat 26, the rotating shaft 24 penetrates the lower part of the pawl 16, the hole in the lower part of the pawl 16 is in clearance fit with the rotating shaft 24, the pawl 16 can rotate relative to the rotating shaft 24, the torsion spring 25 includes an elastic part 2503, both ends of the elastic part 2503 are connected with support parts 2501, one of the support parts 2501 is connected with the connecting hole on the pawl 16, and the other support part 2501 abuts against the inner wall of the mounting seat 26, and the elastic part 2503 is connected with the mounting seat 26 through a positioning shaft; as the pawl 16 continuously approaches the blade, the pawl 16 is swung in the direction of approaching the mounting seat 26 under the blocking effect of the blade, the torsion spring 25 is compressed, and as the pawl 16 continuously moves, the pawl 16 moves to the other side of the blade, the blocking effect disappears, and the pawl 16 is bounced up under the action of the torsion spring 25, so that the twist drill rod is clamped; further, in the direction of extending into the drill hole along the guide cylinder 1, the pawl 16 is arranged at the front of the mounting seat 26 and close to the limiting boss 19, so that the limiting boss 19 plays a limiting role on the pawl 16, the pawl 16 is prevented from swinging in the reverse direction under the resistance effect when the twist drill rod is pulled out, the pawl 16 cannot firmly clamp the drill rod to efficiently transmit power, and the slipping phenomenon is greatly avoided; in order to reduce the compression degree of the torsion spring 25 and further reduce the impact, a guide inclined surface 1602 is arranged at the front of the pawl 16, and the inclination angle of the guide inclined surface 1602 is the same as the helix angle of the twist drill rod; in order to increase the contact area with the drill rod, an arc-shaped groove 1601 is arranged at the end of the pawl 16, and the arc-shaped groove 1601 can abut against the rod body of the twist drill rod.

[0039] As shown in Figure 3As shown, in order to ensure smooth movement of the mounting seat 26 without jamming, a guide ring 22 is further provided on the mounting seat 26. The guide ring 22 contacts the accommodating cavity 18 and generates sliding friction. In this specific embodiment, two guide rings 22 are provided.

[0040] like Figure 6 As shown, in this specific embodiment, the hydraulic oil channel also includes a fluid slip ring 4, and the hydraulic oil channel also includes a fluid slip ring 4. The fluid slip ring 4 is arranged at the end of the push rod 2, and the output end of the fluid slip ring 4 is communicated with the oil inlet channel 20, and the return oil end of the fluid slip ring 4 is communicated with the return oil channel 21, and the input end of the fluid slip ring 4 is used to communicate with the oil supply assembly; specifically, the fluid slip ring 4 includes a rotor and a stator, and the rotor is connected to the end of the push rod 2 through a flange and can rotate with the push rod 2. The stator is fixed by a support frame, the output end of the rotor is communicated with the oil inlet pipe 31, the rotor return oil end is communicated with the return oil pipe 30, and the input end and the return oil end of the stator are communicated with the oil supply assembly 35 through two hoses. The fluid slip ring 4 is now There is technology, and its structure and working principle are not described in detail in this article; the push rod 2 is a hollow structure, and the oil inlet pipe 31 and the oil return pipe 30 are both arranged in the push rod 2, and the oil inlet pipe 31 and the oil return pipe 30 are respectively connected to the corresponding oil inlet channel 20 and the oil return channel 21 through the solenoid valve 28, and the oil outlet end and the oil return end of the solenoid valve 28 are respectively connected to a liquid separator, and the two separators are respectively an oil inlet diverter 29 and an oil return diverter 12, and the oil inlet diverter 29 and the return oil diverter 12 are three-channel structures, that is, the oil inlet channels 20 corresponding to the three accommodating chambers 18 are respectively connected to the three oil pipes of the oil inlet diverter 29, and the oil return channels 21 corresponding to the three containers are respectively connected to the three oil pipes of the return oil diverter 12, and the two liquid separators and the solenoid valve 28 are glued to the inside of the push rod 2.

[0041] like Figure 3 As shown, since the guide cylinder 1 cannot intuitively see the situation of the clamping rod body inside the drill hole, in this specific embodiment, a proximity switch 17 is provided on the surface of the limit boss 19 close to the claw 16, and a pressure sensor 11 is provided on the hydraulic oil channel; specifically, the proximity switch 17 is a normally open switch. When the claw 16 swings and returns to its position, the state of the proximity switch 17 changes from open to closed and then to open, which means that the claw 16 returns to the normal position and engages with the blade. The three oil pipes connected to the three accommodating chambers 18 at the output end of the oil inlet diverter 29 of the hydraulic oil channel are respectively provided with pressure sensors 11. When the pressure monitored by the pressure sensor 11 reaches the set threshold, it means that the three mounting seats 26 are extended, and the three claws 16 abut against the outer surface of the drill pipe to achieve firm clamping; it is convenient for the operator to take the next step according to the signal feedback.

[0042] In the specific embodiment, the outer diameter of the guide cylinder 1 is smaller than the hole diameter of the drilled hole, and the inner diameter of the guide cylinder 1 is greater than the helical diameter of the blade, which is 15-20 mm. Specific embodiment two As shown in Figure 1 and Figure 5 , the specific embodiment provides a twist drill rod taking-out device, which comprises a moving seat 7 and a controller, and further comprises the clamping unit of the twist drill rod of the specific embodiment one, the moving seat 7 is rotationally provided with an adjusting plate 32 through a hinged seat 6, an adjusting oil cylinder 34 is connected between the adjusting plate 32 and the moving seat 7, the cylinder body of the adjusting oil cylinder 34 is hinged to the moving seat 7, the piston rod of the adjusting oil cylinder 34 is hinged to the adjusting plate 32, the angle between the adjusting plate 32 and the horizontal plane can be adjusted through the extension and retraction of the adjusting oil cylinder 34, so that the inclination angle of the adjusting plate 32 is consistent with the drilling direction; the moving seat 7 is movably provided with a moving plate 5, the moving direction of the moving plate 5 is parallel to the length direction of the push rod 2, a motor one 15 is arranged on the moving plate 5, the motor one 15 drives the push rod to rotate, the moving seat 7 is further provided with an oil supply assembly 35, the oil supply assembly 35 is in communication with the hydraulic oil passage, the proximity switch 17, the electromagnetic valve 28 and the pressure sensor 11 are electrically connected with the controller.

[0044] The specific embodiment sets the adjusting plate 32 and the moving plate 5, replaces manual force, has high automation level, and can be matched with the drilling angle, so that the use is more flexible.

[0045] As shown in Figure 1 and Figure 5 , specifically, the adjusting plate 32 is provided with a guide rail and a rack 13, the moving plate 5 is provided with a motor two, the motor two is vertically downward and connected with a gear, the gear is engaged with the rack 13, the oil supply assembly 35 comprises an oil tank 9, an oil pump 10, an overflow valve and a filter 14, the motor delivers the oil liquid in the oil tank 9 to the stator of the fluid slip ring 4 at a certain pressure, then enters the electromagnetic valve 28 through the rotor and the oil inlet pipe 31, after the oil inlet passage of the electromagnetic valve 28 is opened, enters three oil inlets 20 through the oil distributor, and pushes the mounting seat 26 to extend; when the oil is returned, the oil liquid enters the oil return pipe 30 through another oil distributor and the oil return passage of the electromagnetic valve 28, is filtered through the fluid slip ring 4 to the filter 14, and then returns to the oil tank 9; the output shaft of the motor one 15 is provided with a driving gear, the driving gear is engaged with a gear ring 3, the gear ring 3 is sleeved and arranged on the push rod 2, and the moving plate 5 is provided with a limiting plate 27 at both ends of the guide rail.

[0046] As shown in Figure 1 and Figure 5 , the moving seat 7 comprises four telescopic legs 8, the telescopic legs 8 adopt hydraulic oil cylinders to realize lifting and match different drilling heights.

[0047] The lower part of the mobile base 7 can be provided with a track to drive the mobile base 7 to move, thereby enhancing the adaptability to the complex terrain of the mining area and avoiding the movement when the force is applied. THIRD EMBODIMENT The third embodiment provides a method for taking out a twist drill rod, which adopts the twist drill rod taking out device of the second embodiment, and comprises the following steps: S01: Adjust the inclination angle of the adjusting plate 32 by adjusting the oil cylinder 34 so as to be consistent with the drilling direction of the drill hole; S02: Drive the moving plate 5 to move by the motor II, so that the push rod 2 extends into the drill hole, and the guide cylinder 1 is sent to the fallen twist drill; S03: Continuously push the guide cylinder 1 to the twist drill rod until the controller judges that the jaw 16 is clamped with the blade of the twist drill rod through the signal sent by the proximity switch 17; S04: Control the jaw 16 to extend until the pressure sensor 11 monitors that the pressure exceeds the set threshold; S05: Drive the push rod 2 to rotate by controlling the motor I 15, and at the same time control the moving plate 5 to move reversely until the moving plate 5 moves reversely to the initial position, at this time the twist drill rod is exposed from the drill hole; S06: After oil return, the twist drill rod is pulled out.

[0049] In S03, the jaw 16 swings forward and backward and returns to the normal position, and the signal of the proximity switch 17 changes from open to close to normal, and such signal change means that the jaw 16 is clamped with the blade; in S04, the oil inlet channel of the electromagnetic valve 28 is controlled to be conductive, and the hydraulic oil with a certain pressure enters the containing cavity 18, pushes the mounting seat 26 to move, and the clamping jaw moves to the position of the drill rod, when the pressure monitored by the pressure sensor 11 reaches the set threshold, it proves that the jaw 16 clamps the twist drill rod and can effectively transmit the torque; in S05, the rotating speeds of the motor I 15 and the motor II are matched with each other, so as to avoid that the rotating speed of the motor I 15 is slower and the rotating speed of the motor II is faster, which cannot effectively discharge the residual coal powder and rock blocks in the hole and still has a large resistance; in S06, the oil return passage of the electromagnetic valve 28 is controlled to be connected, the oil inlet channel is closed, then the pressure to the side of the jaw 16 is applied to the twist drill rod, so that the jaw 16 is retracted, and then the twist drill rod is pulled out in the direction away from the moving plate 5.

[0050] From the above embodiment, it can be seen that the present application has the following beneficial effects: 1、Through the cooperation of the guide cylinder 1, the jaw assembly 33 and the hydraulic oil channel, the hydraulic clamping and rotating removal of the fallen twist drill rod is realized, through this way, the coal powder and rock block in the drilling hole can move to the outside of the hole along with the twist drill rod, the resistance effect of the coal powder and rock block in the drilling hole is reduced, the pawl 16 assembly is prevented from separating from the twist drill rod, the rod taking is effectively realized, the efficiency is high, and there is no risk; 2、Through the setting of the pawl 16 close to the limiting boss 19, the limiting boss 19 can play a limiting role on the pawl 16, the pawl 16 is prevented from swinging in the reverse direction under the resistance effect when the twist drill rod is pulled out, the power cannot be efficiently transmitted, and the sliding phenomenon is avoided; 3、Through the setting of the guide inclined surface, the pawl 16 can reduce the swinging angle when advancing to the blade of the twist drill rod, and then the advancing resistance in the clamping process is reduced; 4、Through the setting of the arc-shaped groove, the contact area with the rod body of the twist drill rod can be increased, and the clamping stability is enhanced; 5、Through the guide ring 22, the stability of the movement of the mounting seat 26 is enhanced, and skewing is avoided; through the setting of the fluid slip ring 4, the oil pipe is prevented from being entangled when the push rod 2 rotates; 6、Through the proximity switch 17 and the pressure sensor 11, the motion condition of the pawl 16 is known, and whether the twist drill rod is clamped is judged; 7、Through the adjusting plate 32, the drilling direction can be adjusted, and the requirements of taking the drill in various situations are met; 8、Through the rotating and pulling back actions, the twist drill rod is taken out, the coal powder, rock block and other materials in the drilling hole can be discharged, the taking force of the twist drill rod is reduced, and the reliability is improved.

[0051] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamping unit for a twist drill rod, comprising a push rod (2), characterized in that, Also include: The guide cylinder (1) is connected with the end of the push rod (2) and coaxially arranged; The jaw assembly (33) is provided with at least two, adjacent two jaw assemblies (33) are not collinear, the distance between adjacent jaw assemblies (33) is less than the pitch of the twist drill rod, the jaw assembly (33) comprises a mounting seat (26), the mounting seat (26) is arranged on the inner wall of the guide cylinder (1), the mounting seat (26) is provided with a jaw (16), the jaw (16) and the inner wall of the mounting seat (26) are connected with torsion spring (25), the jaw (16) can swing under the action of the blade of twist drill rod, the end of the jaw (16) can abut with the rod body of twist drill rod; The hydraulic oil channel comprises an oil inlet channel (20) and an oil return channel (21), the oil inlet channel (20) and the oil return channel (21) are arranged in the inner wall of the guide cylinder (1), the guide cylinder (1) is further provided with a containing cavity (18), the opening of the containing cavity (18) faces the inside of the guide cylinder (1), the containing cavity (18) is communicated with the oil inlet channel (20) and the oil return channel (21) respectively, the mounting seat (26) is arranged in the corresponding containing cavity (18) and can move axially in the containing cavity (18), the opening of the containing cavity (18) is provided with a limiting boss (19), the mounting seat (26) and the limiting boss (19) are provided with a sealing ring (23).

2. The chucking unit for a twist drill rod according to claim 1, wherein The mounting seat (26) is vertically provided with a rotating shaft (24), the rotating shaft (24) penetrates the lower part of the jaw (16), the jaw (16) can rotate relative to the rotating shaft (24), the torsion spring (25) comprises a elastic part (2503), the two ends of the elastic part (2503) are respectively connected with a supporting part (2501), one supporting part (2501) is connected with the jaw (16), the other supporting part (2501) abuts with the inner wall of the mounting seat (26), the elastic part (2503) is rotatably connected with the mounting seat (26).

3. The chucking unit for a twist drill rod according to claim 2, wherein In the direction of the guide cylinder (1) into the drill hole, the jaw (16) is arranged in the front of the mounting seat (26) and close to the limiting boss (19).

4. The twist drill rod clamping unit according to claim 3, characterized in that: The front of the jaw (16) is provided with a guide inclined surface (1602), the inclination angle of the guide inclined surface (1602) is the same as the helix angle of the twist drill rod.

5. The chucking unit for a twist drill rod according to claim 4, wherein The end of the jaw (16) is provided with an arc-shaped groove (1601), the arc-shaped groove (1601) can abut with the rod body of the twist drill rod.

6. A chucking unit for a twist drill rod according to any one of claims 1-5, characterized in that The mounting seat (26) is further provided with a guide ring (22), the guide ring (22) contacts with the containing cavity (18) and produces sliding friction.

7. The chucking unit for a twist drill rod according to claim 6, wherein The hydraulic oil passage further comprises a fluid slip ring (4) arranged at the end of the push rod (2), the output end of the fluid slip ring (4) is communicated with the oil inlet channel (20), the oil return end of the fluid slip ring (4) is communicated with the oil return channel (21), and the input end of the fluid slip ring (4) is used for being communicated with an oil supply assembly.

8. The chucking unit for twist drills according to claim 7, characterized in that The surface of the limiting boss (19) close to the claw (16) is provided with a proximity switch (17), and the hydraulic oil passage is provided with a pressure sensor (11).

9. A twist drill rod extraction device comprising a mobile seat (7) and a controller, characterized in that, Further comprising a clamping unit of the twist drill rod as claimed in claim 8, an adjusting plate (32) is rotatably arranged on the moving seat (7) through a hinged seat (6), an adjusting oil cylinder (34) is connected between the adjusting plate (32) and the moving seat (7), a moving plate (5) is movably arranged on the adjusting plate (32), the moving direction of the moving plate (5) is parallel to the length direction of the push rod (2), a motor one (15) is arranged on the moving plate (5), the motor one (15) drives the push rod (2) to rotate, an oil supply assembly (35) is further arranged on the moving seat (7), the oil supply assembly (35) is communicated with the hydraulic oil passage, and the proximity switch (17) and the pressure sensor (11) are electrically connected with the controller.

10. A method of removing a twist drill rod, characterized by, The twist drill rod taking-out device as claimed in claim 9 comprises the following steps: S01: adjusting the inclination angle of the adjusting plate (32) to be consistent with the drilling direction; S02: the push rod (2) is inserted into the drill hole to send the guide cylinder (1) into the fallen twist drill; S03: continuously pushing the guide cylinder (1) to the twist drill rod until the claw (16) is clamped with the blade of the twist drill rod through the signal sent by the proximity switch (17); S04: controlling the claw (16) to extend until the pressure sensor (11) monitors that the pressure exceeds the set threshold value; S05: controlling the push rod (2) to rotate and simultaneously controlling the moving plate (5) to move reversely until the moving plate (5) moves reversely to the initial position, at this time, the twist drill rod is exposed from the drill hole; S06: after oil return, the twist drill rod is pulled out.

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