CN220378221U

CN220378221U - Clamping and screwing-on and screwing-off device for drill rod

Info

Publication number: CN220378221U
Application number: CN202321993835.2U
Authority: CN
Inventors: 王向荣; 张艳菊; 魏鸿宇
Original assignee: American Augers Inc
Current assignee: American Augers Inc
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2024-01-23
Anticipated expiration: 2033-07-27

Abstract

The utility model discloses a clamping and screwing-on and unscrewing device for a drill rod, which comprises a base and a fixed seat, wherein two sliding shafts are arranged on the base and penetrate through side plates on two sides of the base, and buffer springs are respectively sleeved at two ends of each sliding shaft; the fixed seat comprises three first, second and third support plates which are arranged at intervals, and the two sliding shaft sleeves penetrate through the first, second and third support plates; the sliding shaft sleeve is arranged on the sliding shaft in a sliding manner, and the buffer spring is elastically arranged between the first supporting plate, the third supporting plate and the side plate on the corresponding side. According to the utility model, when the rear section drill rod is in butt joint or disassembly with the front section drill rod, once the condition that the rear section drill rod suddenly pushes forward or suddenly pulls, the buffer spring can push the fixing seat to move forward or backward, so that the pushing force or the back pulling force of the rear section drill rod is relieved, and the connecting threads on the drill rod are prevented from being damaged.

Description

Clamping and screwing-on and screwing-off device for drill rod

Technical Field

The utility model relates to the technical field of drill rod connection, in particular to a clamping and screwing-on and unscrewing device for a drill rod.

Background

For non-excavation horizontal directional drilling machine and other drilling machine equipment, when a current section of drill rod (a working drill rod) is about to drill into a stratum in the construction working process, a rear section of drill rod needs to be connected with the tail end of the current front section of drill rod in a threaded mode so as to extend the depth of drilling. Or after the hole forming is finished, the plurality of drill rods are sequentially loosened in threaded connection for disassembly.

In order to improve efficiency, chinese patent No. CN 210118106U discloses a combined clamp for connecting between drill rods, which comprises a base, a flat plate, a sliding plate, a vertical plate, a fixed plate, a connecting plate, a supporting plate, a clamping cylinder, a rotating plate, a rotating cylinder, a power cylinder and a clamping block, wherein two sections of drill rods are respectively clamped by the clamping cylinder and the clamping block on the rotating cylinder, and then the rotating plate is pushed to rotate around the axial direction of the drill rods by the power cylinder, so that the two drill rods are disassembled. However, the above scheme has the following problems:

the clamping and screwing-on and-off device of the drill rod adopts hydraulic drive, and in the process of screwing-on and connecting or screwing-off the screw threads of the front drill rod and the rear drill rod, the phenomenon that the rear drill rod is suddenly pushed forward in the screwing-on process or suddenly pulled backward in the screwing-off process easily occurs due to sudden fluctuation of a hydraulic system or proficiency of an operator, and the connecting screw threads on the drill rod are damaged, so that the drill rod is scrapped.

In view of this, there is a need to improve the existing clamping and tripping device of drill rods, so as to avoid the damage to the connecting threads on the drill rods during the connection or disassembly of two drill rods.

Disclosure of Invention

Aiming at the defects, the technical problem to be solved by the utility model is to provide a clamping and screwing-on and screwing-off device for a drill rod, so as to solve the problem that in the prior art, in the process of connecting or disassembling the drill rod, the connecting thread of the drill rod is easy to damage.

The clamping and screwing-on and unscrewing device for the drill rod comprises a base and a fixed seat, wherein the fixed seat is provided with a first clamping mechanism for clamping the front section of the drill rod and a screwing-on and unscrewing device for rotating the rear section of the drill rod,

the base comprises a bottom plate and side plates arranged at two ends of the bottom plate, two sliding shafts are arranged through the side plates at two sides, the two sliding shafts are arranged in parallel, and buffer springs are respectively sleeved at two ends of each sliding shaft;

the fixing seat comprises three first support plates, second support plates and third support plates which are arranged at intervals and are connected into a whole through a connecting plate, two sliding shaft sleeves are arranged above the connecting plate, and the two sliding shaft sleeves are parallel to each other and penetrate through the first support plates, the second support plates and the third support plates; the sliding shaft sleeve is arranged on the sliding shaft in a sliding manner, and the buffer spring is elastically arranged between the first supporting plate, the third supporting plate and the side plate on the corresponding side.

In the above technical solution, preferably, the first clamping mechanism is disposed between the first support plate and the second support plate, a first through hole is disposed at the centers of the first support plate and the second support plate, and the first clamping mechanism is composed of two first clamping cylinders disposed opposite to each other and symmetrically disposed with respect to the first through hole; the buckling and loosening device is arranged between the second supporting plate and the third supporting plate.

In the above technical solution, preferably, a drill rod guiding mechanism is disposed on an outer side surface of the first support plate around the first through hole.

In the above technical solution, preferably, the fastening and loosening device includes two first clamping plates and two second clamping plates that are oppositely disposed, two second clamping cylinders that are oppositely disposed are disposed between the two first clamping plates, a second through hole is disposed in the center of the first clamping plate, a third through hole is disposed in the center of the second clamping plate, the second through hole and the third through hole are respectively disposed coaxially with the first through hole, and the two second clamping cylinders are symmetrically disposed with respect to the second through hole; the movable bushing is arranged in the second through hole, the semicircular bushing is arranged in the third through hole, and the movable bushing and the semicircular bushing are rotatably arranged in the first through hole in the second supporting plate and the third supporting plate.

In the above technical solution, preferably, the third through hole is provided with a notch that is communicated with the top surface of the second clamping plate, the width of the notch is the same as the diameter of the third through hole, the semicircular bushing is provided with a bushing notch that is matched with the notch, and the first through hole in the third supporting plate is provided with a supporting plate notch that is matched with the notch.

In the above technical solution, preferably, one end of the second support plate and one end of the third support plate are provided with a first extension plate, and the end of the first extension plate extends downwards and is provided with a first shaft seat; the ends of the first clamping plate and the second clamping plate are provided with second extension plates, and the ends of the second extension plates extend downwards and are provided with second shaft seats; the upper buckling and releasing oil cylinder comprises a cylinder body and a piston rod, wherein a cylinder body rotating shaft is convexly arranged on the outer side face of the cylinder body, the cylinder body rotating shaft is perpendicular to the axis of the cylinder body, the cylinder body rotating shaft is rotatably arranged on the first shaft seat, a pin shaft is arranged on the piston rod, the pin shaft is perpendicular to the axis of the piston rod, and the pin shaft penetrates through the piston rod, and the two ends of the pin shaft are rotatably arranged in the second shaft seat.

In the above technical scheme, preferably, the front end of the second clamping cylinder is fixed by a fixing plate, two sides of the fixing plate are respectively fixed with the first clamping plate and the second clamping plate, the front end of the second clamping cylinder is provided with a small-diameter step shaft, the fixing plate is provided with a fixing hole matched with the step shaft, and the step shaft is inserted into the fixing hole.

In the above technical solution, preferably, the movable bushing and the semicircular bushing include a shaft sleeve and an annular table disposed at one end of the shaft sleeve, the shaft sleeve is inserted in the second through hole, the annular table is fixed with an outer side surface of the first clamping plate by a bolt, and the annular table is rotatably disposed in the first through hole on the second supporting plate.

In the above technical solution, preferably, the semicircular bushing has a bushing notch adapted to the notch, the sleeve of the semicircular bushing is inserted in the third through hole, the annular table of the semicircular bushing is fixed with the outer side surface of the second clamping plate by a bolt, and the annular table of the semicircular bushing is rotatably disposed in the first through hole on the third supporting plate.

In the above technical solution, preferably, the first clamping cylinder and a piston rod end of the first clamping cylinder are provided with slip seats for clamping the drill rod.

According to the technical scheme, the clamping and screwing-on and unscrewing device for the drill rods solves the problem that connecting threads on the drill rods are easy to damage in the connecting or dismantling process of two drill rods in the prior art. Compared with the prior art, the utility model has the following beneficial effects:

the base is provided with a sliding shaft, the fixed seat is correspondingly provided with a sliding shaft sleeve, the sliding shaft sleeve is arranged on the sliding shaft in a sliding manner, the sliding shaft is sleeved with a buffer spring, and the buffer spring is arranged between the side wall of the base and the fixed seat. When the rear section drill rod is in butt joint with the front section drill rod or is detached, once the condition that the rear section drill rod is suddenly jacked forward or suddenly pulled, the buffer spring can push the fixing seat to move forward or backward, the jacking force or the backward pulling force of the rear section drill rod is relieved, and the connecting threads on the drill rod are prevented from being damaged.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will make brief description and illustrations of the drawings used in the description of the embodiments of the present utility model or the prior art. It is obvious that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic view of a clamping and tripping device for a drill rod provided by the utility model;

FIG. 2 is a schematic view of a base structure according to the present utility model;

FIG. 3 is a schematic diagram illustrating the assembly relationship between a fixing base and a base according to the present utility model;

FIG. 4 is a schematic structural view of a fixing base according to the present utility model;

FIG. 5 is a schematic view of the upper button releasing device of the present utility model;

FIG. 6 is a schematic view of a movable bushing according to the present utility model;

FIG. 7 is a schematic view of a semi-circular bushing according to the present utility model;

FIG. 8 is a schematic view of a top-up trip cylinder of the present utility model;

FIG. 9 is a schematic view showing the internal structure of the upper buckle releasing device of the present utility model;

fig. 10 is an exploded view of the fastening and unfastening device shown in fig. 9.

In fig. 1 to 10, the correspondence of the components is as follows:

front section drill pipe 100, rear section drill pipe 200;

the drill rod guiding mechanism comprises a base 10, a fixed seat 20, a buckling loosening device 30 and a drill rod guiding mechanism 40;

a bottom plate 11, side plates 12, a sliding shaft 13, and a buffer spring 14;

the first support plate 21, the second support plate 22, the third support plate 23, the connecting plate 24, the sliding shaft sleeve 25, the first through hole 26, the first extension plate 28 and the first shaft seat 29;

a support plate notch 231;

a first gripping cylinder 271, a first slip bowl 272, a first swivel 273,

the first clamping plate 311, the second clamping plate 312, the second extension plate 313, the second shaft seat 314, the fixing plate 315 and the fixing hole 316;

a step shaft 321;

the second slip seat 33, the second rotating shaft 34, the second through hole 35, the third through hole 36, the notch 37, the movable bushing 38 and the semicircular bushing 39;

a sleeve 381, an annular land 382, a sleeve notch 391,

the cylinder body 51, the piston rod 52, the cylinder body rotating shaft 53 and the pin 54.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without making any inventive effort are intended to fall within the scope of the present utility model.

In order to make the explanation and the description of the technical solution and the implementation of the present utility model clearer, several preferred embodiments for implementing the technical solution of the present utility model are described below.

In this document, the terms "inner, outer", "front, rear", and "left, right" are expressions based on the usage status of the product, and it is apparent that the usage of the corresponding terms does not limit the scope of the present solution.

Referring to fig. 1, fig. 1 is a schematic view of a clamping and tripping device for a drill rod according to the present utility model.

As shown in fig. 1, the clamping and tripping device of the drill rod provided by the utility model is used for screwing together or screwing out the threaded connection between the rear section of drill rod 200 and the front section of drill rod 100. The clamping and tripping device for the drill rod comprises a base 10, a fixed seat 20 and a tripping device 30.

As shown in fig. 2, the base 10 includes a bottom plate 11 and side plates 12 disposed at both ends of the bottom plate 11, and two sliding shafts 13 are disposed through the side plates 12 at both sides, and the two sliding shafts 13 are disposed parallel to each other. Buffer springs 14 are respectively sleeved at two ends of each sliding shaft 13.

As shown in fig. 3 and 4, the fixing base 20 includes three first support plates 21, second support plates 22 and third support plates 23 arranged at intervals, the bottom surfaces of the three support plates are connected into a whole through a connecting plate 24, two sliding shaft sleeves 25 are arranged above the connecting plate 24, and the two sliding shaft sleeves 25 are parallel to each other and penetrate through the first support plates 21, the second support plates 22 and the third support plates 23.

The sliding shaft sleeve 25 is slidably arranged on the sliding shaft 13, and the buffer springs 14 are elastically arranged between the first support plate 21 and the third support plate 23 and the side plate 12 on the corresponding side, namely one end of one group of buffer springs 14 is abutted against the inner side surface of the side plate 12, and the other end is abutted against the outer side surface of the first support plate 21; one end of the other group of buffer springs 14 abuts against the inner side face of the side plate 12 on the other side, and the other end abuts against the outer side face of the third support plate 23.

The center of first backup pad 21 and second backup pad 22 is equipped with first through-hole 26, be equipped with first clamping mechanism between first backup pad 21 and the second backup pad 22, first clamping mechanism comprises two relative first clamping cylinder 271 that set up, the piston rod tip of first clamping cylinder 271 is equipped with first slip seat 272, two first slip seats 272 set up for first through-hole 26 symmetry, the tail end of first clamping cylinder 271 is equipped with first pivot 273, first pivot 273 is perpendicular with the axis of first clamping cylinder 271, and rotate and set up on first backup pad 21 and second backup pad 22.

One end of the second support plate 22 and one end of the third support plate 23 are provided with a first extension plate 28, and the end of the first extension plate 28 extends downwards and is provided with a first shaft seat 29.

A drill rod guide 40 is provided on the outer side of the first support plate 21 around the first through hole 26, the drill rod guide 40 being for guiding the current previous section of drill rod.

As shown in fig. 5, the fastening and unfastening device 30 is arranged between the second support plate 22 and the third support plate 23, and comprises two first clamping plates 311 and second clamping plates 312 which are arranged oppositely, two second clamping cylinders 32 which are arranged oppositely are arranged between the two first clamping plates 311 and the second clamping plates 312, a second slip seat 33 is arranged at the end part of a piston rod of each second clamping cylinder 32, a second rotating shaft 34 is arranged at the tail end of each second clamping cylinder 32, and the second rotating shaft 34 is perpendicular to the axis of each second clamping cylinder 32 and is arranged on the first clamping plates 311 and the second clamping plates 312 in a rotating manner.

The center of the first clamping plate 311 is provided with a second through hole 35, the center of the second clamping plate 312 is provided with a third through hole 36, the second through hole 35 and the third through hole 36 are respectively arranged coaxially with the first through hole 26, and the two second slip seats 33 are symmetrically arranged relative to the second through hole 35.

The third through hole 36 is provided with a notch 37 communicated with the top surface of the second clamping plate 312, and the width of the notch 37 is the same as the diameter of the third through hole 36 for placing the rear section drill rod. The second through hole 35 is provided with a movable bushing 38, and the third through hole 36 is provided with a semicircular bushing 39.

The ends of the first clamping plate 311 and the second clamping plate 312 are provided with a second extension plate 313, and the ends of the second extension plate 313 extend downwards and are provided with a second shaft seat 314.

As shown in fig. 6, the movable bushing 38 includes a sleeve 381 and an annular table 382 disposed at one end of the sleeve 381, the sleeve 381 is inserted into the second through hole 35, and the annular table 382 is fixed to an outer side surface of the first clamping plate 311 by bolts. The annular table 382 is rotatably disposed within the first through-hole in the second support plate 22.

As shown in fig. 7, the semicircular bushing 39 is the same shape as the movable bushing 38, but has a bushing notch 391 that fits the notch 37. The sleeve of the semicircular bush 39 is inserted into the third through hole 36, and the annular table of the semicircular bush 39 is fixed to the outer side surface of the second clamping plate 312 by bolts. The annular table of the semicircular bush 39 is rotatably provided in the first through hole in the third support plate 23. The first through hole in the third support plate 23 also has a support plate notch 231 adapted to the notch 37, see fig. 4.

As shown in fig. 8, the fastening and releasing oil cylinder 50 includes a cylinder 51 and a piston rod 52, wherein a cylinder rotating shaft 53 is convexly arranged on the outer side surface of the cylinder 51, the cylinder rotating shaft 53 is perpendicular to the axis of the cylinder 51, and is rotatably arranged on the first shaft seat 29. The piston rod 52 is provided with a pin 54, the pin 54 is perpendicular to the axis of the piston rod 52, the pin 54 penetrates through the piston rod 52, and two ends of the pin 54 are rotatably arranged in the second shaft seat 314.

The piston rod 52, the pin 54 and the second extension plate 313 form a swing rod mechanism swinging around the second through hole 35 and the third through hole 36, and the swing rod mechanism cooperates with the second clamping cylinder 32 and the second slip bowl 33 to realize threaded connection and disconnection between the rear section drill rod 200 and the front section drill rod 100.

In the prior art, a second clamping cylinder is installed in a hanging mode, the structure is affected by vibration in operation, and the phenomenon that a fixing bolt is loosened easily occurs.

As shown in fig. 9 and 10, in this application, the front end of the second clamping cylinder 32 is fixed by a fixing plate 315, the fixing plate 315 is a rectangular plate, two sides are respectively fixed with a first clamping plate 311 and a second clamping plate 312, the front end of the second clamping cylinder 32 is provided with a small-diameter step shaft 321, the fixing plate 315 is provided with a fixing hole 316 adapted to the step shaft 321, and the step shaft 321 is inserted into the fixing hole 316. According to the scheme, the front end and the rear end of the second clamping cylinder 32 are effectively fixed, fastening bolts cannot be loosened due to vibration, and the service life and the working reliability are prolonged.

The first clamping cylinder and the second clamping cylinder adopt the same fixing structure, and are not described in detail herein.

The following takes connection of the rear section drill rod and the front section drill rod as an example, and the working process of the utility model is described as follows:

the first slip bowl 272 is driven to grip the forward section of drill pipe 100 using the first gripping cylinder 271.

The rear section drill pipe 200 is placed into the make-up and break-out device 30, wherein the rear section drill pipe 200 is inserted into the semicircular bushing 39 and the movable bushing 38.

The second slip seat 33 is driven by the second clamping oil cylinder 32 to clamp the rear section drill rod 200, the piston rod of the upper buckling and loosening oil cylinder 50 is retracted, and the upper buckling and loosening device 30 is pulled downwards to rotate clockwise around the first through hole 26 on the fixed seat 20, so that the rear section drill rod 200 is driven to rotate, and correspondingly buckling is carried out relative to the front section drill rod 100.

The second slip seat 33 is driven by the second clamping oil cylinder 32 to loosen the rear section drill rod 200, the piston rod of the upper buckling and loosening oil cylinder 50 extends out, and the upper buckling and loosening device 30 is pushed upwards to rotate anticlockwise around the rear section drill rod 200 for resetting.

The second slip seat 33 is driven by the second clamping oil cylinder 32 again to clamp the rear section drill rod 200, the piston rod of the upper buckling and loosening oil cylinder 50 is retracted, and the upper buckling and loosening device 30 is pulled downwards to rotate clockwise around the first through hole 26 on the fixed seat 20, so that the rear section drill rod 200 is driven to rotate, and correspondingly buckling is carried out relative to the front section drill rod 100.

This is done until the rear section of drill rod 200 is threaded with the front section of drill rod 100.

The shackle process is similar to the make-up process and will not be described in detail here.

By combining the description of the specific embodiments, the clamping and screwing-on and unscrewing device for the drill rod provided by the utility model has the following advantages compared with the prior art:

first, be equipped with the sliding shaft on the base, correspond on the fixing base and be equipped with the slip axle sleeve, the slip axle sleeve slides and sets up on the sliding shaft, the cover is equipped with buffer spring on the sliding shaft, buffer spring sets up between the lateral wall of base and fixing base. When the back section drill rod is connected or detached with the front section drill rod, once the back section drill rod suddenly pushes forward or suddenly pulls, the buffer spring can push the fixing seat to move forward or backward, the pushing force or the back force of the back section drill rod is relieved, and the connecting threads of the drill rod are prevented from being damaged.

And secondly, the front end and the rear end of the second clamping oil cylinder are effectively fixed, the fastening bolt is not loosened due to vibration, and the service life and the working reliability are prolonged.

And thirdly, the semicircular bushing and the movable bushing on the upper buckle loosening device are detachably connected through bolts, so that replacement after abrasion is facilitated, and maintenance cost is reduced.

Fourth, adopt semicircle bush to first through-hole in the third backup pad has the backup pad breach, makes things convenient for back end drilling rod installation.

Finally, it is also noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The present utility model is not limited to the above-mentioned preferred embodiments, and any person who can learn the structural changes made under the teaching of the present utility model can fall within the scope of the present utility model if the present utility model has the same or similar technical solutions.

Claims

1. The clamping and screwing-on and unscrewing device for the drill rod comprises a base and a fixed seat, wherein the fixed seat is provided with a first clamping mechanism for clamping the front section of the drill rod and a screwing-on and unscrewing device for rotating the rear section of the drill rod,

2. The clamping and tripping device for the drill rod according to claim 1, wherein the first clamping mechanism is arranged between the first supporting plate and the second supporting plate, a first through hole is formed in the centers of the first supporting plate and the second supporting plate, and the first clamping mechanism consists of two first clamping cylinders which are oppositely arranged and are symmetrically arranged relative to the first through hole; the buckling and loosening device is arranged between the second supporting plate and the third supporting plate.

3. The clamping and tripping device for drill pipes as claimed in claim 2, characterized in that a drill pipe guide means is provided on the outer side of the first support plate around the first through hole.

4. The clamping and tripping device for the drill rod according to claim 2, wherein the tripping device comprises two first clamping plates and two second clamping plates which are oppositely arranged, two second clamping cylinders which are oppositely arranged are arranged between the two first clamping plates, a second through hole is formed in the center of each first clamping plate, a third through hole is formed in the center of each second clamping plate, the second through hole and the third through hole are respectively and coaxially arranged with the first through holes, and the two second clamping cylinders are symmetrically arranged relative to the second through holes; the movable bushing is arranged in the second through hole, the semicircular bushing is arranged in the third through hole, and the movable bushing and the semicircular bushing are rotatably arranged in the first through hole in the second supporting plate and the third supporting plate.

5. The device for clamping and breaking out a drill rod according to claim 4, wherein a notch communicated with the top surface of the second clamping plate is arranged on the third through hole, the width of the notch is the same as the diameter of the third through hole, the semicircular bushing is provided with a bushing notch matched with the notch, and the first through hole in the third supporting plate is provided with a supporting plate notch matched with the notch.

6. The clamping and tripping device for the drill rod according to claim 4, wherein one end of the second support plate and one end of the third support plate are provided with a first extension plate, and the end parts of the first extension plate are arranged in a downward extending manner and are provided with a first shaft seat; the ends of the first clamping plate and the second clamping plate are provided with second extension plates, and the ends of the second extension plates extend downwards and are provided with second shaft seats; the upper buckling and releasing oil cylinder comprises a cylinder body and a piston rod, wherein a cylinder body rotating shaft is convexly arranged on the outer side face of the cylinder body, the cylinder body rotating shaft is perpendicular to the axis of the cylinder body, the cylinder body rotating shaft is rotatably arranged on the first shaft seat, a pin shaft is arranged on the piston rod, the pin shaft is perpendicular to the axis of the piston rod, and the pin shaft penetrates through the piston rod, and the two ends of the pin shaft are rotatably arranged in the second shaft seat.

7. The clamping and tripping device for the drill rod according to claim 4, wherein the front end of the second clamping cylinder is fixed through a fixing plate, two sides of the fixing plate are respectively fixed with the first clamping plate and the second clamping plate, a small-diameter step shaft is arranged at the front end of the second clamping cylinder, a fixing hole matched with the step shaft is formed in the fixing plate, and the step shaft is inserted into the fixing hole.

8. The apparatus according to claim 5, wherein the movable bushing and the semicircular bushing comprise a sleeve and an annular table provided at one end of the sleeve, the sleeve is inserted into the second through hole, the annular table is fixed to an outer side surface of the first clamping plate by bolts, and the annular table is rotatably provided in the first through hole in the second supporting plate.

9. The clamping and tripping device for the drill rod according to claim 8, wherein the semicircular bushing is provided with a bushing notch matched with the notch, a shaft sleeve of the semicircular bushing is inserted into the third through hole, an annular table of the semicircular bushing is fixed with the outer side face of the second clamping plate through bolts, and the annular table of the semicircular bushing is rotatably arranged in the first through hole on the third supporting plate.

10. The pipe gripping apparatus of claim 4, wherein the first gripping ram and the ram end of the first gripping ram are provided with slip sockets for gripping the pipe.