CN218934352U

CN218934352U - Clamping device of drilling rod

Info

Publication number: CN218934352U
Application number: CN202223470497.2U
Authority: CN
Inventors: 石国勇; 路鸣中; 曹敬歌
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-04-28
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a clamping device for a drill rod, which comprises a U-shaped seat, wherein two arc-shaped seats which are symmetrically arranged are arranged on the inner side of the U-shaped seat, four inner rods are fixedly connected to one side, which is opposite to the two arc-shaped seats, of each arc-shaped seat in a rectangular shape, four outer tubes are fixedly embedded in the inner walls of the two sides of the U-shaped seat, and the outer tubes are slidably sleeved on the corresponding inner rods. The device is convenient for personnel to integrally move through the arrangement of the supporting and moving assembly, and through the arrangement of the controller, the synchronous extrusion driving assembly, the outer tube, the inner rod, the two arc-shaped seats, the two elastic guide pressure measuring assemblies and the four extrusion shafts, the clamping work of the drill rod can be carried out by single-drive synchronous control of four extrusion axial middle contractions, the pressure can be automatically detected during clamping and automatically closed when a preset pressure value is reached, the pressure control clamping of the drill rod is convenient to automatically and stably carry out, the clamping force can be automatically controlled, the risk of loosening caused by too small clamping force or excessive clamping force is reduced, and the clamping stability is improved.

Description

Clamping device of drilling rod

Technical Field

The utility model relates to the technical field of auxiliary equipment for disassembling a drill rod, in particular to a clamping device for the drill rod.

Background

The drill rod clamping device in the drilling machine is mainly used for assisting in disassembling and assembling the drill rod when drilling is needed, so that the drill rod is prevented from accidentally falling when disassembling and assembling the drill rod, the traditional drill rod clamping device usually adopts two hydraulic cylinders to match two arc clamping seats to realize shrinkage clamping of the drill rod, and for the clamping technology of the drill rod, in the prior art, the publication number CN214836184U also discloses a drill rod clamping device for a coal mine drilling machine, which comprises a base; the two opposite slip pieces comprise arc-shaped clamping seats, the middle part of the outer side of each arc-shaped clamping seat is connected with a fixed shaft, an upper bracket and a lower bracket which extend to the inner side of each arc-shaped clamping seat are connected to the fixed shaft through torsion spring pieces, slip shafts are respectively connected to the tail ends of the upper bracket and the tail ends of the lower bracket, a plurality of clamping rings are connected to the clamping shafts at intervals, and clamping convex parts are formed on the surfaces of the clamping rings; the driving mechanism is arranged on the base and used for driving the two slip pieces to move relatively; through the setting of two slips spare, can be applicable to the centre gripping operation of the not unidimensional drilling rod in a certain range, and when the centre gripping drilling rod, two slips spare are stronger to the cohesion of drilling rod.

The two driving mechanisms are used for driving the two slip pieces to shrink towards the middle, and four slips on the two slip pieces are used for clamping and fixing a drill rod in an axial middle shrinkage mode, but the two slip pieces still have some defects;

1. the two slip shafts are required to be driven by two driving devices independently, the two driving devices are adopted to be driven independently, the long-term use cost is high, the risk of unsynchronization of two sides of an accident exists, and the unsynchronization of the two sides is easy to cause the deflection damage to the drill rod; 2. the structure for automatically controlling and clamping the drill rod during clamping is lacking, so that the clamping force is difficult to stably control; in view of the above, we propose a clamping device for a drill rod to solve the above problems.

Disclosure of Invention

The utility model mainly aims to provide a clamping device for a drill rod, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the clamping device for the drill rod comprises a U-shaped seat, wherein two arc-shaped seats which are symmetrically arranged are arranged on the inner side of the U-shaped seat, four inner rods are fixedly connected to one repellent side of the two arc-shaped seats in a rectangular shape, four outer tubes are fixedly embedded in the inner walls of the two sides of the U-shaped seat, the outer tubes are slidably sleeved on the corresponding inner rods, and tension springs are fixedly connected between the repellent sides of the two arc-shaped seats and the inner walls of the two sides of the U-shaped seat respectively;

the rear side of the U-shaped seat is fixedly provided with an electric telescopic rod, the extending end of the electric telescopic rod extends into the U-shaped seat and is fixedly connected with a synchronous extrusion driving assembly, the synchronous extrusion driving assembly is hinged with one repellent side of the two arc-shaped seats, the bottom of the electric telescopic rod is fixedly and electrically connected with a controller, and the synchronous extrusion driving assembly is used for synchronously driving the two arc-shaped seats to move relatively for clamping work by single driving;

the two arc seats are embedded and fixed on one side close to each other, the two elastic guide pressure measuring assemblies are electrically connected with the controller, two extrusion shafts are rotatably arranged on one side close to each other, anti-slip rubber sleeves are adhered and coated on the outer sides of the extrusion shafts, the two elastic guide pressure measuring assemblies are used for driving the four extrusion shafts to clamp a drill rod in the middle when the two arc seats are displaced towards the middle, clamping force is detected, and the clamping force is transmitted to the controller, so that the clamping is conveniently controlled after the pressure value of the electric telescopic rod is preset to be closed by the controller;

two sides of the U-shaped seat are fixedly connected with two supporting and moving assemblies.

Preferably, the synchronous extrusion driving assembly comprises a moving rod, two T-shaped guide rods and two inclined connecting rods which are obliquely and symmetrically arranged, wherein the rear side of the moving rod is fixedly connected with the extending end of the electric telescopic rod, the rear side of the moving rod is fixedly connected with the front ends of the two T-shaped guide rods, the U-shaped seat is slidably sleeved on the two T-shaped guide rods, the front side of the moving rod is hinged with the rear ends of the two inclined connecting rods, and the front ends of the two inclined connecting rods are respectively hinged with one repulsive sides of the two arc-shaped seats; the movable rod, the two T-shaped guide rods and the two inclined connecting rods are matched, and when the electric telescopic rod is started in the forward direction to drive the movable rod to move forwards, the movable rod synchronously extrudes and drives the two arc-shaped seats to move relatively through the two inclined connecting rods.

Preferably, the elastic guiding pressure measuring component comprises rectangular boxes, rectangular sliding blocks, pressure sensors and springs, wherein one sides of the two rectangular boxes, which are close to each other, are respectively provided with openings, the two rectangular boxes are respectively embedded and fixed on one sides of the two arc-shaped seats, the rectangular sliding blocks are slidably mounted in the corresponding rectangular boxes, the repulsive sides of the two rectangular sliding blocks are respectively provided with grooves, the pressure sensors are fixedly connected to the inner walls of the corresponding grooves, which are far away from the openings, of the corresponding grooves, one ends of the two springs, which are repulsive, are respectively fixedly connected with the inner walls of the repulsive sides of the two rectangular boxes, one ends of the two springs, which are close to each other, are respectively fixedly connected with one repulsive sides of the two pressure sensors, one sides of the two rectangular sliding blocks, which are close to each other, are respectively rotatably mounted with the corresponding two extrusion shafts, and the two pressure sensors are electrically connected with the controller; the rectangular box, the rectangular sliding block, the pressure sensor and the spring are matched, when the two arc-shaped seats move relatively, clamping work can be carried out by driving four extrusion axial middle displacements through the two rectangular boxes, the two springs, the two pressure sensors and the two rectangular sliding blocks in sequence, the springs are compressed when clamping is formed, and the pressure value of the pressure sensor is detected when the pressure sensor is arranged and transmitted to the controller.

Preferably, the support moving assembly comprises supporting legs and universal wheels with locks, two sides of the U-shaped seat are respectively and fixedly connected with the two corresponding supporting legs, and the universal wheels with locks are rotationally connected to the bottoms of the corresponding supporting legs.

Preferably, two guide perforations which are respectively sleeved with the outer sides of the corresponding T-shaped guide rods in a sliding manner are formed in the inner wall of the rear side of the U-shaped seat.

Preferably, the rear side of the rectangular sliding block is provided with a limiting groove, and the inner wall of the rear side of the rectangular box is fixedly connected with a limiting block which is in sliding connection with the corresponding limiting groove.

Preferably, two sides of the rectangular sliding block, which are close, are respectively and fixedly connected with four supporting seats in a rectangular shape, a supporting shaft is fixedly connected between the two supporting seats which are opposite up and down, a round through hole is formed in the top of the extrusion shaft, two bearings are fixedly sleeved in the round through hole, and the inner ring of each bearing is fixedly sleeved with the outer side of the corresponding supporting shaft.

Compared with the prior art, the utility model has the beneficial effects that:

1. the clamping device of the drill rod is convenient for personnel to integrally move through the arranged supporting and moving assembly;

2. according to the clamping device for the drill rod, the electric telescopic rod, the controller, the synchronous extrusion driving assembly, the outer tube, the inner rod, the two arc-shaped seats, the two elastic guide pressure measuring assemblies and the four extrusion shafts are arranged to be matched, so that the two arc-shaped seats can be synchronously driven to relatively displace when the electric telescopic rod is started, and the four extrusion shafts can be synchronously driven to axially shrink in the middle to clamp the drill rod in a single driving mode;

3. according to the clamping device for the drill rod, the synchronous extrusion driving assembly is matched with the controller, so that the pressure can be automatically detected during clamping and transmitted to the controller signal when the pressure reaches a preset pressure value, the electric telescopic rod can be automatically controlled to be closed when the clamping force reaches the preset clamping force, and the automatic stable pressure control clamping of the drill rod is realized;

4. this clamping device of drilling rod rotates the installation through the extrusion axle and realizes rotatable mode, can not influence personnel to the rotatory dismantlement work of drilling rod when pressing from both sides the drill rod.

The device is convenient for personnel to integrally move through the arrangement of the supporting and moving assembly, and through the arrangement of the controller, the synchronous extrusion driving assembly, the outer tube, the inner rod, the two arc-shaped seats, the two elastic guide pressure measuring assemblies and the four extrusion shafts, the clamping work of the drill rod can be carried out by single-drive synchronous control of four extrusion axial middle contractions, the pressure can be automatically detected during clamping and automatically closed when a preset pressure value is reached, the pressure control clamping of the drill rod is convenient to automatically and stably carry out, the clamping force can be automatically controlled, the risk of loosening caused by too small clamping force or excessive clamping force is reduced, and the clamping stability is improved.

Drawings

Fig. 1 is a schematic overall perspective view of a clamping device for a drill rod according to the present utility model;

FIG. 2 is a schematic top cross-sectional view of a clamping device of the present utility model surrounding the outside of a drill rod;

fig. 3 is an enlarged schematic view of the portion a in fig. 2 according to the present utility model.

In the figure: 1. a U-shaped seat; 2. an arc-shaped seat; 3. an outer tube; 4. an inner rod; 5. a moving rod; 6. an electric telescopic rod; 7. a T-shaped guide rod; 8. an inclined connecting rod; 9. a rectangular box; 10. a rectangular slide block; 11. a spring; 12. a pressure sensor; 13. a support base; 14. an extrusion shaft; 15. an anti-slip rubber sleeve; 16. a tension spring; 17. universal wheel with lock.

Detailed Description

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

As shown in fig. 1 to 3, the clamping device for the drill rod provided by the embodiment comprises a U-shaped seat 1, two symmetrically arranged arc-shaped seats 2 are arranged on the inner side of the U-shaped seat 1, two opposite sides of the two arc-shaped seats 2 are respectively and fixedly connected with four inner rods 4,U in a rectangular manner, four outer tubes 3 are respectively and fixedly embedded on the inner walls of the two sides of the U-shaped seat 1, four embedded holes are respectively formed in the inner walls of the two sides of the U-shaped seat 1, the inner walls of the embedded holes are fixedly connected with the outer sides of the corresponding outer tubes 3, the outer tubes 3 are fixedly embedded on the inner walls of the U-shaped seat 1 through the corresponding embedded holes, the outer tubes 3 are slidably sleeved on the corresponding inner rods 4, tension springs 16 are fixedly connected between the opposite sides of the two arc-shaped seats 2 and the inner walls of the U-shaped seat 1 respectively, and the arranged outer tubes 3 are matched with the inner rods 4, so that the effect of transversely guiding the arc-shaped seats 2 is realized;

the rear side of the U-shaped seat 1 is fixedly provided with an electric telescopic rod 6, the extending end of the electric telescopic rod 6 extends into the U-shaped seat 1 and is fixedly connected with a synchronous extrusion driving assembly, wherein the inner wall of the rear side of the U-shaped seat 1 is provided with a movable through hole for the extending end of the electric telescopic rod 6 to pass through, the synchronous extrusion driving assembly is hinged with one repellent side of the two arc-shaped seats 2, the bottom of the electric telescopic rod 6 is fixedly and electrically connected with a controller, and the synchronous extrusion driving assembly is used for synchronously driving the two arc-shaped seats 2 to move relatively for clamping work by single driving; the synchronous extrusion driving assembly comprises a moving rod 5, two T-shaped guide rods 7 and two inclined connecting rods 8 which are obliquely and symmetrically arranged, wherein the rear side of the moving rod 5 is fixedly connected with the extending ends of the electric telescopic rods 6, the rear side of the moving rod 5 is fixedly connected with the front ends of the two T-shaped guide rods 7, the U-shaped seat 1 is slidably sleeved on the two T-shaped guide rods 7, two guide through holes which are slidably sleeved with the outer sides of the corresponding T-shaped guide rods 7 respectively are formed in the inner wall of the rear side of the U-shaped seat 1, the effect of guiding the T-shaped guide rods 7 in a sliding manner is achieved, the front side of the moving rod 5 is hinged with the rear ends of the two inclined connecting rods 8, and the front ends of the two inclined connecting rods 8 are respectively hinged with the repulsive sides of the two arc-shaped seats 2; the movable rod 5, the two T-shaped guide rods 7 and the two inclined connecting rods 8 are matched, when the electric telescopic rod 6 is started in the forward direction to drive the movable rod 5 to move forwards, the movable rod 5 synchronously extrudes and drives the two arc-shaped seats 2 to move relatively through the two inclined connecting rods 8, and the effect of synchronously driving the two arc-shaped seats 2 to move relatively through single driving is achieved;

the elastic guide pressure measuring assemblies are embedded and fixed on the sides, close to the two arc-shaped seats 2, of the two arc-shaped seats, the two elastic guide pressure measuring assemblies are electrically connected with the controller, the two extrusion shafts 14 are rotatably installed on the sides, close to the two elastic guide pressure measuring assemblies, of the two arc-shaped seats 2, the anti-slip rubber sleeves 15 are adhered and coated on the outer sides of the extrusion shafts 14, the two elastic guide pressure measuring assemblies are used for driving the four extrusion shafts 14 to clamp a drill rod in the middle when the two arc-shaped seats 2 are displaced in the middle, clamping force is detected, clamping force is transmitted to the controller, and therefore pressure control clamping is conveniently carried out after the pressure value of the electric telescopic rod 6 is preset to be closed by the controller; wherein the elastic guiding pressure measuring component comprises rectangular boxes 9, rectangular sliding blocks 10, pressure sensors 12 and springs 11, wherein one sides of the two rectangular boxes 9, which are close, are respectively provided with openings, the two rectangular boxes 9 are respectively embedded and fixed on one sides of the two arc-shaped seats 2, which are close, are respectively provided with embedded grooves, the inner walls of the embedded grooves are fixedly connected with the outer sides of the corresponding rectangular boxes 9, the rectangular boxes 9 are embedded and fixed with the corresponding arc-shaped seats 2 through the embedded grooves, the rectangular sliding blocks 10 are slidably arranged in the corresponding rectangular boxes 9, the rear sides of the rectangular sliding blocks 10 are provided with limit grooves, the inner walls of the rear sides of the rectangular sliding blocks 9 are fixedly connected with limiting blocks which are slidably connected with the corresponding limit grooves, the limiting and anti-falling effects of the rectangular sliding blocks 10 are achieved, one sides of the two rectangular sliding blocks 10, which repel each other, are provided with grooves, the pressure sensor 12 is fixedly connected on the inner wall of one side of the corresponding groove far away from the opening of the groove, the repulsive ends of the two springs 11 are respectively fixedly connected with the inner wall of one side of the two rectangular boxes 9, the repulsive ends of the two springs 11 are respectively fixedly connected with one side of the two pressure sensors 12, one repulsive sides of the two pressure sensors 12 are respectively provided with pressure measuring ends, one adjacent sides of the two rectangular sliding blocks 10 are respectively rotatably installed with the corresponding two extrusion shafts 14, wherein the adjacent sides of the two rectangular sliding blocks 10 are respectively and fixedly connected with four supporting seats 13 in a rectangular shape, a supporting shaft is fixedly connected between the two supporting seats 13 which are opposite up and down, round holes are formed in the top of the extrusion shafts 14, two bearings are fixedly sleeved in the round holes, the inner rings of the bearings are fixedly sleeved on the outer sides of the corresponding supporting shafts, the arranged bearings play the role of rotatably supporting the corresponding extrusion shafts 14, the extrusion shaft 14 is rotatably arranged with the rectangular sliding block 10 through a corresponding bearing and supporting seat 13, and the two pressure sensors 12 are electrically connected with the controller; the rectangular box 9, the rectangular sliding blocks 10, the pressure sensors 12 and the springs 11 are matched, when the two arc-shaped seats 2 move relatively, the four extrusion shafts 14 can be driven to displace towards the middle through the two rectangular boxes 9, the two springs 11, the two pressure sensors 12 and the two rectangular sliding blocks 10 in sequence to carry out clamping work, the springs 11 are compressed when clamping is formed, the pressure values of the arranged pressure sensors 12 during extrusion are detected and transmitted to the controller, and the effect of conveniently carrying out pressure control clamping after the pressure values of the electric telescopic rods 6 are preset and closed by the controller is achieved;

two sides of the U-shaped seat 1 are fixedly connected with two supporting and moving assemblies; the support moving assembly comprises supporting legs and universal wheels 17 with locks, two sides of the U-shaped seat 1 are respectively and fixedly connected with the corresponding two supporting legs, and the universal wheels 17 with locks are rotatably connected to the bottoms of the corresponding supporting legs; the landing leg that sets up cooperates with the universal wheel 17 of area lock, utilizes four universal wheels 17 of area lock to play the effect of convenient removal.

The application method of the embodiment is as follows: the device is moved to a drill rod of a drilling machine to be clamped through four universal wheels 17 with locks, the drill rod is positioned between two arc seats 2, a closing pressure value of an electric telescopic rod 6 is set and controlled by a controller in advance according to the pressure required to be clamped, a person positively starts the electric telescopic rod 6 to drive the moving rod 5 to move forwards, the moving rod 5 drives two T-shaped guide rods 7 to move forwards, meanwhile, the moving rod 5 drives two inclined connecting rods 8 to rotationally squeeze the two arc seats 2 towards directions close to each other, under the extrusion force, the two arc seats 2 are moved close to each other and drive an inner rod 4 to slide in a corresponding outer tube 3, the arc seats 2 stretch corresponding tension springs 16, at the moment, the two arc seats 2 sequentially drive four extrusion shafts 14 to shrink towards the middle through two rectangular boxes 9, two springs 11, two pressure sensors 12 and two rectangular sliding blocks 10, and the four extrusion shafts 14 drive four anti-skid rubber sleeves 15 to clamp the drill rod towards the middle, so that the two arc seats 2 can be synchronously controlled to move in a single drive mode, and the four extrusion shafts 14 to shrink to work synchronously;

when the anti-slip rubber sleeve 15 moves to be in contact with the outer side of a drill rod, the anti-slip rubber sleeve is limited by shielding, at the moment, two arc-shaped seats 2 which continue to move relatively drive two rectangular boxes 9 to slide on two rectangular sliding blocks 10 respectively, the rectangular boxes 9 compress corresponding springs 11 to be gradually tightened and hardened, the springs 11 in a compressed state sequentially tighten the extrusion shaft 14 through corresponding pressure sensors 12 and the rectangular sliding blocks 10, the tightening and clamping of the drill rod are realized, the pressure sensors 12 detect the tightening force of extrusion and transmit the tightening force to a controller, when the pressure value reaches a preset closing pressure value, the controller controls the electric telescopic rod 6 to be automatically closed, and the automatic stabilization and the clamping of the drill rod are realized in a mode of automatically detecting the pressure during clamping and automatically closing the drill rod when the pressure value reaches the preset pressure value, so that the clamping force can be automatically controlled, and the risk of loosening caused by too small clamping force or excessive clamping force is reduced;

the anti-slip rubber sleeve 15 can enhance the friction force in the vertical direction of the drill rod during clamping, prevent the drill rod from sliding down, and utilize the extrusion shaft 14 to rotate to install and realize a rotatable mode, when personnel need rotate the drill rod to carry out disassembly and assembly work, the anti-slip rubber sleeve 15 can be in a clamping state with the extrusion shaft 14 through friction driving while ensuring to press tightly with the anti-slip rubber sleeve 15, the anti-slip rubber sleeve 15 can not be separated to cause a sliding phenomenon, the rotatable mode during clamping is utilized to prevent the influence on the disassembly work of the drill rod, and when the clamping state is needed to be released subsequently, the electric telescopic rod 6 is reversely started, the movement direction of the electric telescopic rod 6 is completely opposite to that of the electric telescopic rod 6 is started in the same way, at the moment, the movable rod 5 is converted into backwards to drive the two inclined connecting rods 8 to backwards rotate, the two inclined connecting rods 8 to the two arc seats 2 to backwards pull in the direction of repulsion, and the two tension springs 16 in the stretching state at the moment assist to pull the two arc seats 2 to move in the repulsion, and the four extrusion shafts 14 are driven to separate and release the clamping work.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. Clamping device of drilling rod, including U-shaped seat (1), its characterized in that: two arc-shaped seats (2) which are symmetrically arranged are arranged on the inner side of the U-shaped seat (1), four inner rods (4) are fixedly connected to one side, which is opposite to the two arc-shaped seats (2), of each arc-shaped seat in a rectangular shape, four outer tubes (3) are fixedly embedded in the inner walls of the two sides of the U-shaped seat (1), the outer tubes (3) are slidably sleeved on the corresponding inner rods (4), and tension springs (16) are fixedly connected between the opposite sides of the two arc-shaped seats (2) and the inner walls of the two sides of the U-shaped seat (1);

the rear side of the U-shaped seat (1) is fixedly provided with an electric telescopic rod (6), the extending end of the electric telescopic rod (6) extends into the U-shaped seat (1) and is fixedly connected with a synchronous extrusion driving assembly, the synchronous extrusion driving assembly is hinged with one repulsive side of the two arc-shaped seats (2), and the bottom of the electric telescopic rod (6) is fixedly and electrically connected with a controller;

the two elastic guide pressure measuring assemblies are fixedly embedded in one side, close to the arc-shaped seats (2), of the two arc-shaped seats, the two elastic guide pressure measuring assemblies are electrically connected with the controller, two extrusion shafts (14) are rotatably arranged on one side, close to the two elastic guide pressure measuring assemblies, of the two arc-shaped seats, and an anti-slip rubber sleeve (15) is adhered and coated on the outer side of each extrusion shaft (14);

two sides of the U-shaped seat (1) are fixedly connected with two supporting and moving assemblies.

2. A pipe gripping apparatus as defined in claim 1 wherein: synchronous extrusion drive assembly includes movable rod (5), two T shape guide arm (7) and two oblique connecting rod (8) that slope symmetry set up, the rear side of movable rod (5) and the extension end fixed connection of electric telescopic handle (6), the front end fixed connection of rear side and two T shape guide arm (7) of movable rod (5), U-shaped seat (1) slip cap is established on two T shape guide arm (7), the front side of movable rod (5) articulates with the rear end of two oblique connecting rod (8), the front end of two oblique connecting rod (8) articulates with one side that two arc seats (2) repel each other respectively.

3. A pipe gripping apparatus according to claim 2, wherein: the elastic guide pressure measuring assembly comprises rectangular boxes (9), rectangular sliding blocks (10), pressure sensors (12) and springs (11), wherein the close sides of the two rectangular boxes (9) are respectively provided with openings, the two rectangular boxes (9) are respectively embedded and fixed on the close sides of the two arc-shaped seats (2), the rectangular sliding blocks (10) are slidably installed in the corresponding rectangular boxes (9), the repulsive sides of the two rectangular sliding blocks (10) are respectively provided with grooves, the pressure sensors (12) are fixedly connected to the inner walls of the sides, away from the openings, of the corresponding grooves, the repulsive ends of the two springs (11) are respectively fixedly connected with the inner walls of the repulsive sides of the two rectangular boxes (9), the close ends of the two springs (11) are respectively fixedly connected with the repulsive sides of the two pressure sensors (12), the close sides of the two rectangular sliding blocks (10) are respectively rotatably installed with the corresponding two extrusion shafts (14), and the two pressure sensors (12) are respectively electrically connected with a controller.

4. A pipe gripping apparatus as defined in claim 1 wherein: the support moving assembly comprises supporting legs and universal wheels (17) with locks, two sides of the U-shaped seat (1) are respectively and fixedly connected with the two corresponding supporting legs, and the universal wheels (17) with locks are rotatably connected to the bottoms of the corresponding supporting legs.

5. A pipe gripping apparatus according to claim 2, wherein: two guide perforations which are respectively sleeved with the outer sides of the corresponding T-shaped guide rods (7) in a sliding manner are formed in the inner wall of the rear side of the U-shaped seat (1).

6. A pipe gripping apparatus according to claim 3, wherein: limiting grooves are formed in the rear side of the rectangular sliding block (10), and limiting blocks which are in sliding connection with the corresponding limiting grooves are fixedly connected to the inner wall of the rear side of the rectangular box (9).

7. A pipe gripping apparatus according to claim 3, wherein: two one sides of the rectangular sliding blocks (10) which are similar are fixedly connected with four supporting seats (13) in a rectangular shape, supporting shafts are fixedly connected between the two supporting seats (13) which are opposite up and down, round holes are formed in the tops of the extrusion shafts (14), two bearings are fixedly sleeved in the round holes, and the inner rings of the bearings are fixedly sleeved on the outer sides of the corresponding supporting shafts.