CN219191310U

CN219191310U - Socket joint formula PPR hot melt welding support

Info

Publication number: CN219191310U
Application number: CN202320348026.XU
Authority: CN
Inventors: 秦新
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-06-16
Anticipated expiration: 2033-02-28

Abstract

A socket PPR hot-melt welding bracket. The utility model relates to the technical field of hot-melt welding. The utility model aims to solve the problems of high operation strength, low working efficiency and low welding precision caused by the fact that the existing hot-melt welding support mostly adopts a floor type structure when the PPR pipe is welded. The utility model comprises a main support, a horizontal driving mechanism, two groups of connecting rod mechanisms, two groups of adjustable clamping mechanisms and two groups of limiting and propping mechanisms, wherein the main support is horizontally arranged, the two groups of adjustable clamping mechanisms are symmetrically arranged at the left side and the right side of the lower part of the main support, the adjustable clamping mechanisms are connected with the main support through the connecting rod mechanisms, the horizontal driving mechanism is arranged in the main support, the output ends of the horizontal driving mechanism are respectively connected with the two connecting rod mechanisms, and the two groups of limiting and propping mechanisms are vertically and symmetrically fixedly connected with the outer sides of the right-side adjustable clamping mechanisms. The utility model is used for the hot-melt welding of PPR pipes.

Description

Socket joint formula PPR hot melt welding support

Technical Field

The utility model relates to the technical field of hot-melt welding, in particular to a socket type PPR hot-melt welding bracket.

Background

Compared with the traditional cast iron pipe, galvanized steel pipe, cement pipe and other pipes, the PPR pipe has the advantages of energy conservation, material saving, environmental protection, light weight, high strength, corrosion resistance, smooth inner wall, no scaling, simple and convenient construction and maintenance, long service life and the like, and is widely applied to the building industry, municipal administration, industry and agriculture fields such as building water supply and drainage, urban and rural water supply and drainage, urban fuel gas, electric power and optical cable sheaths, industrial fluid transportation, agricultural irrigation and the like.

In field construction, the pipe is usually required to be subjected to hot-melt welding so as to meet the use requirements of pipe length, steering and the like. Then when current tubular product hot melt welds, the tubular product of aperture is mostly operated through artifical direct utilization hot melt machine, lead to both ends pipeline interface dislocation limit rate high, influence pipeline life, simultaneously to the tubular product of aperture, current hot melt welding support is comparatively heavy, mostly adopt the console mode structure, usually need accomplish the welding with whole pipeline subaerial after, hoist and mount to required position again, lead to present construction operation intensity big, the operating efficiency is low, moreover current hot melt welding support takes place axial displacement easily when the welding, can't realize effective location, lead to the cartridge degree of depth insufficient, the axiality also receives the influence.

Disclosure of Invention

The utility model aims to solve the problems of high operation strength, low working efficiency and low welding precision caused by the fact that the existing hot-melt welding support mostly adopts a floor type structure when a PPR pipe is welded, and further provides a socket type PPR hot-melt welding support.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a socket joint formula PPR hot melt welding support includes main support, horizontal driving mechanism, two sets of link mechanism, clamping mechanism and two sets of spacing tight mechanisms that push up with adjustable two sets of, the main support level sets up, clamping mechanism symmetry sets up the left and right sides in main support lower part with adjustable clamping mechanism, and adjustable clamping mechanism passes through link mechanism and is connected with the main support, horizontal driving mechanism sets up the inside at the main support, horizontal driving mechanism's output is connected with two link mechanism respectively, two sets of spacing tight mechanisms vertical symmetry rigid coupling is in the outside of the adjustable clamping mechanism on right side.

Further, the link mechanism comprises a connecting pin shaft, two main links and two driven rods, the two main links are symmetrically arranged on the front side and the rear side of the main support frame, the upper ends of the main links are fixedly connected with the output end of the horizontal driving mechanism, the lower ends of the main links are hinged with the adjustable clamping mechanism, the driven rods are identical to the main links in length, the two driven rods are symmetrically arranged on the front side and the rear side of the main support frame, the driven rods are arranged on the outer sides of the main links in parallel, the connecting pin shaft is horizontally arranged in the main support frame, the end parts of the connecting pin shaft penetrate through the main support frame and extend to the outer parts of the main support frame, the upper ends of the driven rods are hinged with the end parts of the connecting pin shaft, and the lower ends of the driven rods are hinged with the adjustable clamping mechanism.

Further, the horizontal driving mechanism comprises a horizontal moving handle, a worm, two worm wheels and two output shafts, wherein the lower end of the worm is vertically inserted into the inner side of the upper part of the main support frame, the horizontal moving handle is fixedly connected to the upper end of the worm, the two output shafts are horizontally arranged in the main support frame and symmetrically arranged on two sides of the worm, the worm wheels are fixedly connected to the middle part of the output shaft, the two worm wheels are respectively arranged on two sides of the worm and meshed with the worm, the end part of the output shaft penetrates through the main support frame and extends to the outer part of the main support frame, and the end part of the output shaft serves as the output end of the horizontal driving mechanism.

Further, the worm gear is a sector worm gear.

Further, clamping mechanism with adjustable includes link, the connecting block, two lead screw, the bearing frame, two nuts and two clamping jaws, the link sets up perpendicularly with the main support frame, the connecting block rigid coupling is in the upper end at link middle part, the lower extreme of main link and driven lever is articulated with the connecting block respectively, two clamping jaws set up along the length direction symmetry of link, the upper end and the link sliding connection of clamping jaw, the bearing frame rigid coupling is in the lower extreme at the link middle part, the upper portion of clamping jaw is equipped with the cartridge hole, the embedded fixedly connected with nut of cartridge hole, two lead screw cartridge is in two nuts, and two screw thread sections of two lead screw respectively with a nut threaded connection, the middle part cartridge of two lead screw is in the bearing frame, the tip rigid coupling of two lead screw has the twist grip.

Further, a self-lubricating shaft sleeve is arranged between the side wall of the bidirectional screw rod and the bearing seat.

Further, the both sides of link are equipped with the slide along length direction respectively, and the upper end of clamping jaw is equipped with the spout, and the spout suit is in the outside of two slides and with slide sliding connection.

Further, a V-shaped groove is formed in the inner side end face of the lower portion of the clamping jaw along the width direction.

Further, the limiting jacking mechanism comprises an adjusting rod, a stop block, a locking mechanism and a jacking bolt, the adjusting rod is vertically fixedly connected to the outer side end face of the clamping jaw, the stop block is vertically arranged with the adjusting rod, one end of the stop block is sleeved on the side wall of the adjusting rod and is in sliding connection with the adjusting rod, the stop block is fixedly locked with the adjusting rod through the locking mechanism, and the jacking bolt is connected to the side wall of the other end of the stop block through threads.

Further, a plurality of threaded holes are uniformly distributed in the side wall of the other end of the stop block along the length direction, and the two threaded holes are respectively provided with a jacking bolt.

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

according to the socket type PPR hot-melt welding bracket provided by the utility model, a portable structural design is adopted, the hot-melt welding can be carried out in cooperation with the set position of the pipe, the pipe is welded after being lifted, the whole pipeline is not required to be lifted, the labor intensity of workers is reduced, the two-end pipe is respectively clamped and positioned through two groups of adjustable clamping mechanisms, the use requirements of the pipes with various apertures are met, the two-end pipe is relatively moved by utilizing a horizontal driving mechanism, the hot-melt and welding fixation are finished, and the limiting jacking mechanism can axially limit and jack the pipe in the welding process, so that the position of the pipe is prevented from moving in the welding process. The whole operation of the welding bracket is simple, the operation efficiency is high, the whole hot-melt welding process is always coaxial, rolling and dislocation cannot occur in the pipe moving process, the welding precision is ensured, and the service life of a pipeline is prolonged. The application range of the hot-melt welding bracket is not limited by the aperture of the pipe, the application field is not limited, the welding can be performed at the positions of high altitude, vertical, horizontal, corners and the like, and the hot-melt welding bracket can be widely applied to the hot-melt welding of pipes such as PPR, PE and the like.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is an exploded view of the overall structure of the present utility model;

FIG. 3 is a schematic view of the structure of the jaw 13 of the left-hand adjustable clamping mechanism of the present utility model;

FIG. 4 is a schematic view of the structure of the clamping jaw 13 of the right-hand adjustable clamping mechanism of the present utility model;

fig. 5 is a front view of the stopper 21 in the present utility model;

fig. 6 is a left side view of fig. 5.

Detailed Description

The first embodiment is as follows: referring to fig. 1 to 6, the description of the present embodiment is that a socket type PPR hot-melt welding support includes a main support 1, a horizontal driving mechanism, two sets of link mechanisms, two sets of adjustable clamping mechanisms and two sets of limiting and propping mechanisms, the main support 1 is horizontally disposed, the two sets of adjustable clamping mechanisms are symmetrically disposed on the left and right sides of the lower portion of the main support 1, the adjustable clamping mechanisms are connected with the main support 1 through the link mechanisms, the horizontal driving mechanism is disposed in the main support 1, the output ends of the horizontal driving mechanism are respectively connected with the two link mechanisms, and the two sets of limiting and propping mechanisms are vertically and symmetrically fixedly connected on the outer sides of the right-side adjustable clamping mechanisms.

In this embodiment, when carrying out tubular product hot melt welding, press from both sides tight location to both ends tubular product through two sets of clamping mechanism with adjustable respectively, satisfy the user demand of various aperture tubular product to utilize horizontal driving mechanism to carry out the relative movement of both ends tubular product, accomplish hot melt and welded fastening, spacing tight mechanism in top of welding process can carry out the spacing tight top of axial to the tubular product, prevents that the tubular product position from taking place to remove in the welding process.

Handles 24 are fixedly connected to the two ends of the main support frame 1. So as to facilitate the handling of the support.

The main support frame 1 is of a hollow closed box type structure, a structure that the upper end cover of the box body is provided with a box cover is adopted, and a horizontal driving mechanism is arranged in the main support frame 1.

The second embodiment is as follows: referring to fig. 1 to 6, in this embodiment, the link mechanism includes a connection pin 5, two main links 3 and two driven links 4, the two main links 3 are symmetrically disposed on front and rear sides of the main support 1, the upper end of the main link 3 is fixedly connected with the output end of the horizontal driving mechanism, the lower end of the main link 3 is hinged with the adjustable clamping mechanism, the driven links 4 are the same as the length of the main link 3, the two driven links 4 are symmetrically disposed on front and rear sides of the main support 1, the driven links 4 are disposed in parallel on the outer side of the main link 3, the connection pin 5 is horizontally disposed in the main support 1, the end of the connection pin 5 passes through the main support 1 and extends to the outside of the main support 1, the upper end of the driven link 4 is hinged with the end of the connection pin 5, and the lower end of the driven link 4 is hinged with the adjustable clamping mechanism. The technical features not disclosed in this embodiment are the same as those of the first embodiment.

The axial movement of the two groups of adjustable clamping mechanisms is realized through the driving of the horizontal driving mechanism and the transmission of the connecting rod mechanism, and the horizontal movement of the pipes at the two ends is completed.

A plurality of through holes are formed in the main connecting rod 3 and the driven rod 4, so that dead weight is reduced, and strength of the rod body is increased.

And a third specific embodiment: referring to fig. 1 to 6, the horizontal driving mechanism according to this embodiment includes a horizontal moving handle 2, a worm 6, two worm gears 7, and two output shafts 8, wherein the lower end of the worm 6 is vertically inserted into the upper inner side of the main support 1, the horizontal moving handle 2 is fixedly connected to the upper end of the worm 6, the two output shafts 8 are horizontally disposed in the main support 1 and symmetrically disposed on two sides of the worm 6, the worm gears 7 are fixedly connected to the middle of the output shaft 8, the two worm gears 7 are disposed on two sides of the worm 6 and meshed with the worm 6, the end of the output shaft 8 passes through the main support 1 and extends to the outside of the main support 1, and the end of the output shaft 8 is used as the output end of the horizontal driving mechanism. The technical features not disclosed in this embodiment are the same as those of the second embodiment.

Through the vertical lifting of the worm 6 driven by the horizontal moving handle 2, the worm wheel 7 is meshed with the worm 6 to drive the output shaft 8 to rotate, so that the main connecting rod 3 rotates around the axis direction of the output shaft 8.

The specific embodiment IV is as follows: the present embodiment will be described with reference to fig. 1 to 6, in which the worm wheel 7 is a sector worm wheel. The technical features not disclosed in this embodiment are the same as those of the third embodiment.

The design is designed to save the occupied space of the worm wheel 7 and reduce the whole direct volume and weight.

Fifth embodiment: referring to fig. 1 to 6, in this embodiment, the adjustable clamping mechanism includes a connecting frame 9, a connecting block 10, a bidirectional screw rod 11, a bearing seat 14, two nuts 12 and two clamping jaws 13, the connecting frame 9 is vertically disposed with the main support frame 1, the connecting block 10 is fixedly connected at the upper end of the middle part of the connecting frame 9, the lower ends of the main connecting rod 3 and the driven rod 4 are respectively hinged with the connecting block 10, the two clamping jaws 13 are symmetrically disposed along the length direction of the connecting frame 9, the upper ends of the clamping jaws 13 are slidably connected with the connecting frame 9, the bearing seat 14 is fixedly connected at the lower end of the middle part of the connecting frame 9, the upper part of the clamping jaws 13 is provided with an insertion hole 18, the nut 12 is fixedly connected with the insertion hole 18 in an embedded manner, the bidirectional screw rod 11 is inserted into the two nuts 12, the middle part of the bidirectional screw rod 11 is respectively in the bearing seat 14 in a threaded connection with one nut 12, and the end part of the bidirectional screw rod 11 is fixedly connected with a rotating handle 19. The technical features not disclosed in this embodiment are the same as those of the second embodiment.

By rotating the rotary handle 19, the bidirectional screw rod 11 is driven to rotate, so that the two clamping jaws 13 move relatively or reversely, clamping or loosening of the pipe is realized, and the use requirements of the pipes with different radial dimensions are met.

The width of the clamping jaw 13 in the right adjustable clamping mechanism is smaller, the clamping jaw is matched with the limiting and jacking mechanism at the rear end to use, and the width of the clamping jaw 13 in the left adjustable clamping mechanism is larger, so that the clamping jaw is used for independent clamping.

Specific embodiment six: the present embodiment will be described with reference to fig. 1 to 6, in which a self-lubricating bushing is provided between the side wall of the bi-directional screw 11 and the bearing housing 14. The technical features not disclosed in this embodiment are the same as those of the fifth embodiment.

The self-lubricating shaft sleeve can be a graphite shaft sleeve, and has the function of axially limiting the bidirectional screw rod 11, and simultaneously providing lubrication for the rotation of the bidirectional screw rod 11 and reducing friction.

Seventh embodiment: referring to fig. 1 to 6, in the present embodiment, two sides of the connecting frame 9 are respectively provided with a slide way 15 along the length direction, the upper ends of the clamping jaws 13 are provided with slide ways 16, and the slide ways 16 are sleeved on the outer sides of the two slide ways 15 and are slidably connected with the slide ways 15. The technical features not disclosed in this embodiment are the same as those of the fifth embodiment.

Designed so as to achieve a sliding movement of the jaws 13 along the length of the connecting frame 9.

Eighth embodiment: the present embodiment is described with reference to fig. 1 to 6, in which V-shaped grooves 17 are provided in the width direction on the inner end surface of the lower portion of the jaw 13. The technical features not disclosed in this embodiment are the same as those of the fifth embodiment.

The clamping and positioning of the pipe are convenient to achieve through the design, the use requirements of different pipe diameters are met, and universality is achieved.

The groove wall of the V-shaped groove 17 is provided with serrated anti-slip teeth.

The tip of the V-shaped groove 17 is provided with an arc chamfer.

Detailed description nine: referring to fig. 1 to 6, in this embodiment, the limit tightening mechanism includes an adjusting rod 20, a stop block 21, a locking mechanism 22 and a tightening bolt, the adjusting rod 20 is vertically and fixedly connected to the outer end surface of the clamping jaw 13, the stop block 21 is vertically arranged with the adjusting rod 20, one end of the stop block 21 is sleeved on the side wall of the adjusting rod 20 and is slidably connected with the adjusting rod 20, the stop block 21 is fixedly locked with the adjusting rod 20 through the locking mechanism 22, and the tightening bolt is screwed on the side wall of the other end of the stop block 21. The technical features not disclosed in this embodiment are the same as those of the fifth embodiment.

The axial positioning of the pipe is realized by adjusting the position of the stop block 21 to enable the stop block to be arranged on the end face of the pipe and pushing the pipe wall of the end face of the pipe by the pushing bolt.

The locking mechanism 22 in this embodiment is an eccentric cam locking mechanism comprising an eccentric cam locking handle, a clamping lever and a locking nut. One end of the stop block 21 is provided with a mounting hole, the mounting through hole is sleeved on the side wall of the adjusting rod 20, the outer side of the mounting through hole is provided with a through groove, a clamping rod is inserted into the through groove, one end of the clamping rod is fixedly connected with a locking nut, and the other end of the clamping rod is provided with an eccentric cam locking handle for locking.

Detailed description ten: referring to fig. 1 to 6, in the present embodiment, a plurality of threaded holes 23 are uniformly distributed on a sidewall at the other end of the stopper 21 along the length direction, wherein two threaded holes 23 are respectively provided with a tightening bolt. The technical features not disclosed in this embodiment are the same as those of the embodiment nine.

The position of the jacking bolt is adjusted according to the pipes with different pipe diameters, so that the tail end of the jacking bolt is propped against the circular pipe wall of the end face of the pipe, and effective jacking and positioning of the pipe are realized.

Principle of operation

When the socket type PPR hot-melt welding bracket is used, two sections of pipes are hoisted to a preset required position, the pipes are radially positioned, then the horizontal moving handle 2 is rotated, the horizontal positions of two groups of adjustable clamping mechanisms are adjusted, each adjustable clamping mechanism is respectively arranged on the outer side of one section of pipe, the rotating handle 19 is rotated, the pipes are respectively clamped by the moving clamping jaw 13, the axial positions of the stop blocks 21 are adjusted, the jacking bolts on the stop blocks 21 are propped against the annular pipe wall of the end face of one section of pipe, then the hot-melt machine is utilized to carry out hot-melt on the two sections of pipes between the two groups of adjustable clamping mechanisms, the horizontal movement of the pipes is realized by rotating the horizontal moving handle 2, the adjustable clamping mechanisms are simultaneously moved inwards and close to the hot-melt machine, the hot-melt of the pipe wall is realized, then the adjustable clamping mechanisms are simultaneously moved outwards and far away from the hot-melt machine, after the hot-melt machine is removed, the adjustable clamping mechanisms are simultaneously moved inwards, the two sections of pipe are inserted, the pipe is kept for a period of time, and the pipe is cooled and fixed, and the hot-melt welding bracket is removed.

In order to reduce the dead weight of the bracket, the main support frame 1, the clamping jaw 13 and other components can be made of aluminum alloy materials.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. 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. A socket joint formula PPR hot melt welding support, its characterized in that: the adjustable clamping mechanism comprises a main support (1), a horizontal driving mechanism, two groups of connecting rod mechanisms, two groups of adjustable clamping mechanisms and two groups of limiting and propping mechanisms, wherein the main support (1) is horizontally arranged, the two groups of adjustable clamping mechanisms are symmetrically arranged on the left side and the right side of the lower portion of the main support (1), the adjustable clamping mechanisms are connected with the main support (1) through the connecting rod mechanisms, the horizontal driving mechanism is arranged in the main support (1), the output ends of the horizontal driving mechanism are respectively connected with the two connecting rod mechanisms, and the two groups of limiting and propping mechanisms are vertically and symmetrically fixedly connected with the outer sides of the right-side adjustable clamping mechanisms.

2. The socket PPR hot-melt welded bracket according to claim 1, wherein: the connecting rod mechanism comprises a connecting pin shaft (5), two main connecting rods (3) and two driven rods (4), wherein the two main connecting rods (3) are symmetrically arranged on the front side and the rear side of the main support frame (1), the upper ends of the main connecting rods (3) are fixedly connected with the output end of the horizontal driving mechanism, the lower ends of the main connecting rods (3) are hinged with the adjustable clamping mechanism, the driven rods (4) are identical to the main connecting rods (3) in length, the two driven rods (4) are symmetrically arranged on the front side and the rear side of the main support frame (1), the driven rods (4) are arranged on the outer sides of the main connecting rods (3) in parallel, the connecting pin shafts (5) are horizontally arranged in the main support frame (1), the end parts of the connecting pin shafts (5) penetrate through the main support frame (1) and extend to the outer parts of the main support frame (1), and the upper ends of the driven rods (4) are hinged with the end parts of the connecting pin shafts (5), and the lower ends of the driven rods (4) are hinged with the adjustable clamping mechanism.

3. The socket PPR hot-melt welded bracket according to claim 2, wherein: the horizontal driving mechanism comprises a horizontal moving handle (2), a worm (6), two worm gears (7) and two output shafts (8), wherein the lower end of the worm (6) is vertically inserted into the inner side of the upper portion of the main support frame (1), the horizontal moving handle (2) is fixedly connected to the upper end of the worm (6), the two output shafts (8) are horizontally arranged in the main support frame (1) and symmetrically arranged on two sides of the worm (6), the middle of each output shaft (8) is fixedly connected with the worm gears (7), the two worm gears (7) are respectively arranged on two sides of the worm (6) and meshed with the worm (6), the end portion of each output shaft (8) penetrates through the main support frame (1) and extends to the outer portion of the main support frame (1), and the end portion of each output shaft (8) serves as an output end of the horizontal driving mechanism.

4. A socket PPR hot melt welded bracket according to claim 3, wherein: the worm wheel (7) is a sector worm wheel.

5. The socket PPR hot-melt welded bracket according to claim 2, wherein: the adjustable clamping mechanism comprises a connecting frame (9), a connecting block (10), a bidirectional screw rod (11), a bearing seat (14), two nuts (12) and two clamping jaws (13), wherein the connecting frame (9) is vertically arranged with a main support frame (1), the connecting block (10) is fixedly connected to the upper end of the middle part of the connecting frame (9), the lower ends of a main connecting rod (3) and a driven rod (4) are respectively hinged to the connecting block (10), the two clamping jaws (13) are symmetrically arranged along the length direction of the connecting frame (9), the upper ends of the clamping jaws (13) are in sliding connection with the connecting frame (9), the bearing seat (14) is fixedly connected to the lower end of the middle part of the connecting frame (9), the upper parts of the clamping jaws (13) are provided with inserting holes (18), the nuts (12) are fixedly arranged in the inserting holes (18), the two threaded sections of the bidirectional screw rod (11) are respectively in threaded connection with one nut (12), the middle part of the bidirectional screw rod (11) is fixedly connected to the bearing seat (14), and the end part of the bidirectional screw rod (11) is provided with a rotating screw rod (19).

6. The socket PPR hot-melt welded bracket according to claim 5, wherein: a self-lubricating shaft sleeve is arranged between the side wall of the bidirectional screw rod (11) and the bearing seat (14).

7. The socket PPR hot-melt welded bracket according to claim 5, wherein: the two sides of the connecting frame (9) are respectively provided with a slide way (15) along the length direction, the upper ends of the clamping jaws (13) are provided with slide grooves (16), and the slide grooves (16) are sleeved on the outer sides of the two slide ways (15) and are in sliding connection with the slide ways (15).

8. The socket PPR hot-melt welded bracket according to claim 5, wherein: a V-shaped groove (17) is formed in the inner side end face of the lower portion of the clamping jaw (13) along the width direction.

9. The socket PPR hot-melt welded bracket according to claim 5, wherein: the limiting jacking mechanism comprises an adjusting rod (20), a stop block (21), a locking mechanism (22) and a jacking bolt, wherein the adjusting rod (20) is vertically fixedly connected to the outer side end face of the clamping jaw (13), the stop block (21) is vertically arranged with the adjusting rod (20), one end of the stop block (21) is sleeved on the side wall of the adjusting rod (20) and is in sliding connection with the adjusting rod (20), the stop block (21) is fixedly locked with the adjusting rod (20) through the locking mechanism (22), and the jacking bolt is connected to the side wall of the other end of the stop block (21) through threads.

10. The socket PPR hot melt welded bracket according to claim 9, wherein: a plurality of threaded holes (23) are uniformly distributed in the side wall of the other end of the stop block (21) along the length direction, and a jacking bolt is respectively arranged in the two threaded holes (23).