CN218031804U

CN218031804U - Flood control drain pipe supporting device

Info

Publication number: CN218031804U
Application number: CN202222251658.2U
Authority: CN
Inventors: 傅志芬; 陈雪红; 江映祥
Original assignee: Fujian Jianglong Water Conservancy And Hydropower Engineering Co ltd
Current assignee: Fujian Jianglong Water Conservancy And Hydropower Engineering Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-12-13
Anticipated expiration: 2032-08-24

Abstract

The application relates to a flood control drain pipe supporting device which comprises a mounting frame and a bracket for fixing a drain pipe, wherein the mounting frame is arranged in a ditch, the bracket comprises a first clamping plate and a second clamping plate which are both provided with grooves, the first clamping plate and the second clamping plate are arranged at the top of the mounting frame in a sliding manner, and the mounting frame is provided with a fixing mechanism for fixing the positions of the first clamping plate and the second clamping plate; one side of the first clamping plate with the groove is opposite to one side of the second clamping plate with the groove, and the first air bag is installed on one side of the first clamping plate with the groove and one side of the second clamping plate with the groove. The application of a flood control drain pipe supporting device can adapt to the drain pipes with different pipe diameters, is convenient for install and protect the drain pipes with different pipe diameters, and has the effects of energy conservation and environmental protection.

Description

Flood control drain pipe supporting device

Technical Field

The application relates to the field of water supply and drainage construction, in particular to a flood control drain pipe supporting device.

Background

The drain pipe mainly undertakes such tasks as rainwater, sewage, farmland drainage and irrigation, collects rivers and discharges, has played the effect of flood control. When the drainage pipeline is installed and transformed, the supporting device is installed in a ditch, and the safety of underground structure construction and the surrounding environment of a foundation pit is ensured.

Current supporting device is at the in-process of in-service use, because the pipe diameter of the drain pipe of different models is different on the market, when the drain pipe of different models needs to be installed, need use the supporting device of different models to fix the drain pipe, it is convenient inadequately to use, and the practicality is relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to conveniently install the protection to the drain pipe of different pipe diameters, this application provides a flood control drainage supporting device.

The application provides a flood control drainage supporting device adopts following technical scheme:

a flood control drainage support device comprises an installation frame and a bracket for fixing a drainage pipe, wherein the installation frame is installed in a ditch, the bracket comprises a first clamping plate and a second clamping plate which are both provided with grooves, the first clamping plate and the second clamping plate are installed at the top of the installation frame in a sliding mode, and the installation frame is provided with a fixing mechanism for fixing the positions of the first clamping plate and the second clamping plate; one side of the first clamping plate with the groove is opposite to one side of the second clamping plate with the groove, and the first air bag is arranged on one side of the first clamping plate with the groove and one side of the second clamping plate with the groove.

By adopting the technical scheme, when the drain pipe needs to be laid, the first clamping plate and the second clamping plate are moved to be close to each other, so that the drain pipe can be clamped by the first clamping plate and the second clamping plate together, and then the drain pipe can be stably fixed between the first clamping plate and the second clamping plate by using the fixing mechanism; the setting of first gasbag can adapt to the drain pipe of different models, and when the periphery wall of drain pipe contacted with first gasbag, adaptive deformation can take place for first gasbag and wrap up the drain pipe, is convenient for install the protection to the drain pipe of different pipe diameters, has energy-concerving and environment-protective effect.

Optionally, two slide rails are mounted at the top of the mounting frame, the two slide rails are arranged side by side and distributed at intervals, and the extension directions of the slide rails and the length direction of the mounting frame are arranged in the same direction; a sliding plate is connected between the two sliding rails in a sliding manner, the number of the sliding plates is two, and the first clamping plate and the second clamping plate are respectively connected to the two sliding plates; the mounting bracket is provided with a linkage assembly for enabling the first clamping plate and the second clamping plate to approach/separate from each other.

By adopting the technical scheme, the two sliding plates can smoothly move on the sliding rail by arranging the sliding rail, so that the first clamping plate and the second clamping plate can smoothly slide on the mounting frame; the setting of linkage subassembly is favorable to improving the convenience of the common centre gripping drain pipe of first splint and second splint.

Optionally, the linkage assembly comprises a first connecting rod, a second connecting rod and a rotating block, the rotating block is long-strip-shaped, a rotating shaft is fixed in the middle of the rotating block, and the rotating block is rotatably mounted on the mounting frame through the rotating shaft; the first connecting rod and the second connecting rod are respectively hinged to one side, away from the rotating shaft, of the rotating block, the hinged position of the first connecting rod and the hinged position of the second connecting rod are respectively located on two sides of the rotating block in the extending direction, one end, away from the rotating block, of the first connecting rod is hinged to the first clamping plate, and one end, away from the rotating block, of the second connecting rod is hinged to the second clamping plate.

Through adopting foretell technical scheme, through setting up aggregate unit, constructor promotes first splint when removing to the direction that is close to the second splint, the head rod is close to the direction of axis of rotation in the articulated department of slide, the rotation takes place to rotate in one side that the swivel block connects the head rod, order about the swivel block and use the axis of rotation axis as the axle center and take place to rotate, can drive the articulated slide of second connecting rod and be close to the axis of rotation direction, first splint and second splint are close to common centre gripping drain pipe simultaneously, the installation effectiveness of fixed drain pipe has been improved.

Optionally, the fixing mechanism includes a locking plate and two clamping components, the locking plate is fixed to the mounting frame and located outside the slide rail, and the extension direction of the locking plate and the extension direction of the slide rail are arranged at intervals; two the joint subassembly is fixed in two slide plates respectively, the joint subassembly is located one side that the slide plate is close to the lock position board, works as the joint subassembly is just when locking the position hole, joint subassembly joint is in locking the position hole.

Through adopting foretell technical scheme, when constructor promoted the slide plate and make first splint and second splint be close to each other, the joint subassembly is just right to each position locking hole in proper order to the joint subassembly can be gone into automatically and the position locking is downthehole, thereby plays the effect of fixed first splint, second splint position on the mounting bracket, reduces the possibility that first splint, second splint freely removed.

Optionally, the joint subassembly includes shell, spring and horizontal pole, the shell is fixed in one side that the slide plate is close to the lock position board, the shell is kept away from the one end of slider and has been seted up movable groove, the horizontal pole is installed in movable groove, spring mounting is between horizontal pole and movable groove.

Through adopting foretell technical scheme, when constructor promoted the slide plate and make first splint and second splint be close to each other, the horizontal pole of joint subassembly is just in proper order to each lock position hole to in the lock position hole is gone into to card in proper order under the effect of spring, thereby plays the effect of fixed first splint, second splint position on the mounting bracket.

Optionally, a fixing rod is fixed to the outer wall of the cross rod, the housing is provided with a first sliding hole, the first sliding hole is long in strip shape, the extending direction of the first sliding hole is arranged in the same direction as the length direction of the housing, and the fixing rod penetrates through the first sliding hole; and a second sliding hole is formed in the inner wall of the first sliding hole, and when the fixed rod enters the second sliding hole, the spring is in a compressed state.

By adopting the technical scheme, when the position of the sliding plate on the sliding rail needs to be adjusted, a constructor shifts the fixed rod into the second sliding hole, so that the spring is kept in a compressed state, the action that the cross rod needs to be frequently pushed into the movable groove in the moving process of the sliding plate is reduced, and the installation efficiency of the fixed drain pipe is improved; when the position of fixed slide plate on the slide rail, stir the dead lever to first slide hole from the second slide hole in, the horizontal pole passes the lockhole under the effect of spring to play the effect of fixed first splint, second splint position on the mounting bracket.

Optionally, a support rod for assisting in supporting the drain pipe is installed on one side of the mounting frame close to the bottom of the ditch, the support rod comprises a first sleeve, a second sleeve and a support plate, and the first sleeve is fixed to the mounting frame; the utility model discloses a set up the gasbag, including first sleeve pipe, mounting bracket, backup pad, second sleeve pipe, backup pad, first sleeve pipe is kept away from the one end of mounting bracket and has been seted up the mounting groove, first sleeve pipe is installed in the mounting groove, the position of second sleeve pipe in the mounting groove is established to be adjustable, the backup pad is installed in the second sleeve pipe and is kept away from first sheathed tube one end, the backup pad is kept away from second sheathed tube one side and is installed the second gasbag.

By adopting the technical scheme, when the drain pipe is fixed in the bracket, the position of the first sleeve in the mounting groove is adjusted, so that the support plate is attached to the bottom wall of the drain pipe, and the stability of the mounting frame for supporting the drain pipe is further improved; when the position of adjustment drain pipe in the bracket, the setting of second gasbag can adapt the drain pipe of the different models, and when the diapire of drain pipe contacted with the second gasbag, adaptability deformation can take place for the second gasbag, is convenient for install the protection to the drain pipe of different pipe diameters.

Optionally, the second sleeve is fixed with two fixed blocks, the two fixed blocks are symmetrically arranged along the axis of the first sleeve, a sliding groove for the fixed blocks to move is formed in the inner peripheral wall of the mounting groove, the extending direction of the sliding groove and the extending direction of the mounting groove are arranged in the same direction, a plurality of limiting grooves are further formed in the inner peripheral wall of the mounting groove, all the limiting grooves are arranged at intervals along the axis of the housing, and each limiting groove is communicated with the two sliding grooves; the inner diameter of the limiting groove is matched with the maximum distance between the two fixing blocks.

Through adopting foretell technical scheme, through setting up the fixed block, the fixed block freely removes in the sliding tray, when the bracing piece was close to the drain pipe diapire, rotates the second sleeve pipe along the axis direction, and the fixed block can get into spacing groove and joint in spacing inslot, reduces the possibility that the second sleeve pipe freely removed in first sleeve pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the bracket and the first air bag, the bracket clamps the peripheral wall of the drain pipe, the first air bag can be adapted to drain pipes of different types, and when the peripheral wall of the drain pipe is contacted with the first air bag, the first air bag can generate adaptive deformation and wrap the drain pipe, so that the drain pipes with different pipe diameters can be conveniently installed and protected, and the energy-saving and environment-friendly effects are achieved;

2. by arranging the linkage assembly, a constructor can simultaneously drive the other clamping plate to move when moving the first clamping plate/the second clamping plate, so that the convenience of position adjustment of the first clamping plate and the second clamping plate is improved, and the installation efficiency of the drain pipe is further improved;

3. through setting up the bracing piece, when the bracing piece is close to the drain pipe diapire, rotate the second sleeve along the axis direction, the fixed block can get into spacing groove and joint in the spacing inslot, further improves the stability after the drain pipe installation.

Drawings

Fig. 1 is a schematic view showing the overall construction of a flood control drain pipe supporting apparatus;

fig. 2 is a partial enlarged view at a of fig. 1;

FIG. 3 is a partial schematic view of the clamping assembly;

FIG. 4 is a partial cross-sectional view of the snap-in assembly;

figure 5 is a partial cross-sectional view of the support pole.

Description of reference numerals: 1. a mounting frame; 11. a bottom support frame; 12. a support pillar; 13. a shoring frame; 14. a slide rail; 15. a support block; 2. a bracket; 21. a first splint; 22. a second splint; 23. a first air bag; 24. a slide plate; 3. a linkage assembly; 31. a first connecting rod; 32. a second connecting rod; 33. rotating the block; 34. a rotating shaft; 4. a fixing mechanism; 41. a position locking plate; 411. a lock position hole; 42. a clamping assembly; 421. a housing; 422. a spring; 423. a cross bar; 424. a movable groove; 425. a limiting ring; 426. a baffle ring; 427. a first slide hole; 428. a second slide hole; 429. fixing the rod; 5. a support bar; 51. a first sleeve; 52. a second sleeve; 53. a support plate; 54. mounting grooves; 55. a limiting groove; 56. a sliding groove; 57. a fixed block; 58. a second air bag.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses flood control drainage supporting device.

Referring to fig. 1, the flood control drain pipe support device comprises a mounting frame 1 and a bracket 2 for fixing a drain pipe, wherein the mounting frame 1 is mounted on a ditch; the mounting frame 1 of the present embodiment includes a bottom bracing frame 11, a supporting column 12 and a top bracing frame 13, the bottom bracing frame 11 and the top bracing frame 13 of the present embodiment are both rectangular frame structures, and the bottom bracing frame 11 is fixed at the bottom of the trench; four support columns 12 are arranged, and the four support columns 12 are respectively vertical to four corner positions of the bottom bracing frame 11; the top bracing frame 13 is fixed to the top of all the support columns 12.

Referring to fig. 1, the bracket 2 includes a first clamping plate 21 and a second clamping plate 22, a first groove is formed on one side of the first clamping plate 21 facing the second clamping plate 22, and a second groove is formed on one side of the second clamping plate 22 facing the first clamping plate 21; the first air bag 23 is arranged in each of the first groove and the second groove, the first air bag 23 can be adapted to drain pipes of different types, and when the outer peripheral wall of each drain pipe is in contact with the first air bag 23, the first air bag 23 deforms adaptively and wraps the drain pipe; the surface of the first air bag 23 is provided with a damping surface, so that the possibility of the drain pipe separating from the bracket 2 is reduced, and the possibility of the drain pipe falling and damaging is reduced.

Referring to fig. 1, two slide rails 14 are installed to the top bracing frame 13, and two slide rails 14 set up and interval distribution side by side, and the length direction of slide rail 14 sets up with the length direction syntropy of top bracing frame 13, and it is connected with slide block 24 to slide between two slide rails 14, and slide block 24's quantity has two, and first splint 21, second splint 22 connect respectively in two slide block 24, and first splint 21 and second splint 22 of being convenient for remove at mounting bracket 1.

Referring to fig. 2, the mounting bracket 1 is provided with a linkage assembly 3 used for the first clamping plate 21 and the second clamping plate 22 to approach to/separate from each other, the linkage assembly 3 comprises a first connecting rod 31, a second connecting rod 32 and a rotating block 33, a supporting block 15 is arranged in the middle of the top bracing frame 13, the extension direction of the supporting block 15 is perpendicular to the extension direction of the two slide rails 14, a rotating shaft 34 is fixed in the middle of the supporting block 15, and one end of the rotating shaft 34, which is far away from the supporting block 15, is rotatably connected to the middle of the rotating block 33, so that the rotating block 33 freely rotates on the supporting block 15; the rotating shaft 34 is in a long strip shape, the first connecting rod 31 and the second connecting rod 32 are both hinged to one side of the rotating block 33 far away from the rotating shaft 34, the hinged position of the first connecting rod 31 and the rotating block 33 and the hinged position of the second connecting rod 32 and the rotating block 33 are respectively located on two sides of the extending direction of the rotating block 33, one end of the first connecting rod 31 far away from the rotating block 33 is hinged to the middle of the sliding plate 24 connected with the first clamping plate 21, and one end of the second connecting rod 32 far away from the rotating block 33 is hinged to the middle of the sliding plate 24 connected with the second clamping plate 22.

Referring to fig. 1, the fixing mechanism 4 for fixing the positions of the first clamping plate 21 and the second clamping plate 22 on the slide rail 14 is installed on the top support frame 13, the fixing mechanism 4 comprises a locking plate 41 and two clamping components 42, the locking plate 41 is installed at the top of the installation frame 1, the locking plate 41 is located on the outer side of the slide rail 14, the extension direction of the locking plate 41 and the extension direction of the slide rail 14 are arranged in the same direction, a plurality of locking holes 411 are formed in the locking plate 41, and all the locking holes 411 are arranged in the same direction and at the same interval along the extension direction of the locking plate 41.

Referring to fig. 3 and 4, two sets of clamping components 42 are fixed in two slide plates 24 respectively, and clamping component 42 includes shell 421, spring 422 and horizontal pole 423, and the one end of shell 421 is fixed in one side that slide plate 24 is close to lock position board 41, and movable groove 424 has been seted up to the one end that slide plate 24 was kept away from to shell 421, and horizontal pole 423 installs in movable groove 424, and the one end of spring 422 is fixed in the one end that movable groove 424 is close to slide plate 24, and the other end and the horizontal pole 423 looks butt of spring 422. A limiting ring 425 is arranged at the notch of the movable groove 424, and the inner diameter of the limiting ring 425 is smaller than that of the movable groove 424; the outer diameter of the cross rod 423 is equal to the inner diameter of the limiting ring 425, so that the cross rod 423 can smoothly slide in the movable groove 424; a stop ring 426 is fixed on the outer peripheral wall of the cross rod 423, the outer diameter of the stop ring 426 is equal to the inner diameter of the movable groove 424, and the stop ring 426 and the limiting ring 425 are arranged to reduce the possibility that the cross rod 423 is separated from the movable groove 424.

Referring to fig. 3 and 4, the housing 421 is provided with a first sliding hole 427, the first sliding hole 427 is elongated, the extending direction of the first sliding hole 427 is arranged in the same direction as the length direction of the housing 421, and the cross bar 423 is connected with a fixing rod 429 through the first sliding hole 427; the inner wall of the first sliding hole 427 defines a second sliding hole 428, the spring 422 is compressed when the fixing rod 429 is located in the second sliding hole 428, and when the fixing rod 429 moves from the second sliding hole 428 into the first sliding hole 427, the spring 422 is decompressed, and the spring 422 drives the cross bar 423 to move outward.

Referring to fig. 5, a supporting rod 5 for assisting in supporting the drain pipe is installed at the bottom of the installation frame 1, the supporting rod 5 comprises a first sleeve 51, a second sleeve 52 and a supporting plate 53, the second sleeve 52 is connected with the supporting plate 53, a second air bag 58 is installed on one side, far away from the second sleeve 52, of the supporting plate 53, the second air bag 58 can be adapted to drain pipes of different types, and when the bottom wall of the drain pipe is in contact with the second air bag 58, the second air bag 58 can deform adaptively, so that the drain pipes of different pipe diameters can be installed and protected conveniently; first sleeve pipe 51 is vertical to be fixed in mounting bracket 1 bottom, the montant is fixed with two fixed blocks 57, first sleeve pipe 51 keeps away from the one end of irrigation canals and ditches and has seted up mounting groove 54, seted up a plurality of spacing grooves 55 in the mounting groove 54 and supply the gliding sliding tray 56 of fixed block 57, the extending direction syntropy setting of sliding tray 56 and second sleeve pipe 52, all spacing grooves 55 prolong first sleeve pipe 51 axis direction interval and set up, each spacing groove 55 all is linked together with two sliding tray 56, the internal diameter of spacing groove 55 equals with two fixed blocks 57's maximum distance. When the outer wall laminating of bracing piece 5 and drain pipe, rotate second sleeve 52 along first sleeve 51 axis direction, fixed block 57 joint in spacing groove 55 has reduced the possibility that second sleeve 52 freely removed in first sleeve 51, has further improved the stability that mounting bracket 1 supported the drain pipe.

The implementation principle of the flood control drain pipe supporting device in the embodiment of the application is as follows:

when a drainage pipe needs to be laid, a constructor shifts the fixing rod 429 into the second sliding hole 428 to keep the spring 422 in a compressed state, moves the position of the sliding plate 24 connected with the first clamping plate 21 on the sliding rail 14, and under the action of the linkage assembly 3, the two sliding plates 24 approach to each other simultaneously; the height of the supporting rod 5 is adjusted simultaneously, so that the drain pipe is stably erected on the bracket 2, the possibility that the drain pipe falls from the bracket 2 is reduced, the condition that a plurality of supporting devices are manufactured for the drain pipes with different pipe diameters in a matched mode is reduced, and the effects of energy conservation and environmental protection are achieved.

The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a flood control drain pipe supporting device which characterized in that: the drainage pipe fixing device comprises a mounting rack (1) and a bracket (2) used for fixing a drainage pipe, wherein the mounting rack (1) is installed in a ditch, the bracket (2) comprises a first clamping plate (21) and a second clamping plate (22) which are both provided with grooves, the first clamping plate (21) and the second clamping plate (22) are installed at the top of the mounting rack (1) in a sliding mode, and a fixing mechanism (4) used for fixing the positions of the first clamping plate (21) and the second clamping plate (22) is installed on the mounting rack (1); first splint (21) take notched one side and second splint (22) take notched one side just to setting up, first splint (21) have the recess and second splint (22) take notched one side all to install first gasbag (23).

2. A flood protection drain support device according to claim 1, wherein: the top of the mounting rack (1) is provided with two sliding rails (14), the two sliding rails (14) are arranged side by side and distributed at intervals, and the extension direction of the sliding rails (14) is arranged in the same direction as the length direction of the mounting rack (1); sliding plates (24) are connected between the two sliding rails (14) in a sliding manner, the number of the sliding plates (24) is two, and the first clamping plate (21) and the second clamping plate (22) are respectively connected to the two sliding plates (24); the mounting frame (1) is provided with a linkage assembly (3) for enabling the first clamping plate (21) and the second clamping plate (22) to approach/depart from each other.

3. A flood protection drain support device according to claim 2, wherein: the linkage assembly (3) comprises a first connecting rod (31), a second connecting rod (32) and a rotating block (33), the rotating block (33) is long-strip-shaped, a rotating shaft (34) is fixed in the middle of the rotating block (33), and the rotating block (33) is rotatably mounted on the mounting frame (1) through the rotating shaft (34); first connecting rod (31), second connecting rod (32) articulate respectively in turning block (33) and keep away from one side of axis of rotation (34), the articulated position of first connecting rod (31) and turning block (33) and the articulated position of second connecting rod (32) and turning block (33) are located the extension direction's of turning block (33) both sides respectively, the one end that turning block (33) were kept away from in first connecting rod (31) articulates in first splint (21), the one end that turning block (33) were kept away from in second connecting rod (32) articulates in second splint (22).

4. A flood protection drain support device according to claim 2, wherein: the fixing mechanism (4) comprises a locking plate (41) and two clamping components (42), the locking plate (41) is fixed on the mounting frame (1) and located on the outer side of the sliding rail (14), and the extension direction of the locking plate (41) and the extension direction of the sliding rail (14) are arranged at intervals; two joint subassembly (42) are fixed in two slide plate (24) respectively, joint subassembly (42) are located slide plate (24) and are close to one side of keeping silent (41), work as joint subassembly (42) are just when keeping silent hole (411), joint subassembly (42) joint is in keeping silent hole (411).

5. A flood protection drain support device according to claim 4, wherein: clamping subassembly (42) include shell (421), spring (422) and horizontal pole (423), shell (421) are fixed in one side that slide plate (24) are close to lock position board (41), movable groove (424) have been seted up to the one end that slider was kept away from in shell (421), install in movable groove (424) horizontal pole (423), install between horizontal pole (423) and movable groove (424) spring (422).

6. A flood protection drain support device according to claim 5, wherein: a fixing rod (429) is fixed on the outer wall of the cross rod (423), a first sliding hole (427) is formed in the shell (421), the first sliding hole (427) is long in strip shape, the extending direction of the first sliding hole (427) is arranged in the same direction as the length direction of the shell (421), and the fixing rod (429) is arranged in the first sliding hole (427) in a penetrating mode; the inner wall of the first sliding hole (427) is provided with a second sliding hole (428), and when the fixed rod (429) enters the second sliding hole (428), the spring (422) is in a compressed state.

7. A flood protection drain pipe support device according to claim 1, wherein: a supporting rod (5) for assisting in supporting a drain pipe is installed on one side, close to the bottom of the ditch, of the mounting frame (1), the supporting rod (5) comprises a first sleeve (51), a second sleeve (52) and a supporting plate (53), and the first sleeve (51) is fixed to the mounting frame (1); an installation groove (54) is formed in one end, far away from the installation frame (1), of the first sleeve (51), the first sleeve (51) is installed in the installation groove (54), the position, in the installation groove (54), of the second sleeve (52) is adjustable, one end, far away from the first sleeve (51), of the second sleeve (52) is installed on the supporting plate (53), and a second air bag (58) is installed on one side, far away from the second sleeve (52), of the supporting plate.

8. A flood protection drain support device according to claim 7, wherein: the second sleeve (52) is fixedly provided with two fixing blocks (57), the two fixing blocks (57) are symmetrically arranged along the axis of the first sleeve (51), the inner peripheral wall of the mounting groove (54) is internally provided with a sliding groove (56) for the fixing blocks (57) to move, the extension direction of the sliding groove (56) is arranged in the same direction as the extension direction of the mounting groove (54), the inner peripheral wall of the mounting groove (54) is also provided with a plurality of limiting grooves (55), all the limiting grooves (55) are arranged at intervals along the axis direction of the shell (421), and each limiting groove (55) is communicated with the two sliding grooves (56); the inner diameter of the limiting groove (55) is matched with the maximum distance between the two fixing blocks (57).