阅读说明：本技术 复合风管 (Composite air duct ) 是由 梁宜松 于 2021-01-26 设计创作，主要内容包括：本发明公开了一种复合风管,包括多个复合风管本体,所述复合风管本体包括四个外钢板和四个内钢板,四个内钢板构成一个第一矩形管,四个内钢板相互靠近的一侧均设为倾斜面并相焊接,四个内钢板位于四个外钢板之间,内钢板靠近对应的外钢板的一侧与外钢板固定连接,相邻的两个外钢板之间固定连接有同一个保温块,四个外钢板和四个保温块构成一个第二矩形管,外钢板远离对应的内钢板的一侧螺纹紧固有多个增强筋。本发明设计合理,便于在通风的过程中对产生的噪音进行有效降噪,且便于对法兰进行多向缓冲卸力防护,降低因碰撞力较大造成相邻的两个法兰之间产生缝隙导致的泄露风险,满足使用需求,有利于使用。(The invention discloses a composite air duct which comprises a plurality of composite air duct bodies, wherein each composite air duct body comprises four outer steel plates and four inner steel plates, the four inner steel plates form a first rectangular duct, the sides, close to each other, of the four inner steel plates are all arranged as inclined planes and welded together, the four inner steel plates are positioned among the four outer steel plates, one sides, close to the corresponding outer steel plates, of the inner steel plates are fixedly connected with the outer steel plates, the same heat insulation block is fixedly connected between every two adjacent outer steel plates, the four outer steel plates and the four heat insulation blocks form a second rectangular duct, and a plurality of reinforcing ribs are fastened on the side, far away from the corresponding inner steel plate, of each outer steel plate through threads. The multi-directional buffer force-unloading protection device is reasonable in design, facilitates effective noise reduction of generated noise in the ventilation process, facilitates multi-directional buffer force-unloading protection of the flanges, reduces leakage risk caused by the fact that a gap is generated between two adjacent flanges due to large collision force, meets use requirements, and is beneficial to use.)

1. Composite air pipe, including a plurality of composite air pipe bodies, the composite air pipe body includes four outer steel plates (1) and four inner steel plates (20), four inner steel plates (20) constitute a first rectangular pipe, one side of four inner steel plates (20) close to each other is set as the inclined plane and welded mutually, characterized in that, four inner steel plates (20) are located between four outer steel plates (1), one side of inner steel plate (20) close to corresponding outer steel plate (1) is fixedly connected with outer steel plate (1), fixedly connected with same heat preservation block (27) between two adjacent outer steel plates (1), four outer steel plates (1) and four heat preservation blocks (27) constitute a second rectangular pipe, one side of outer steel plate (1) far away from corresponding inner steel plate (20) is screwed with a plurality of reinforcing ribs (2), the top and the bottom of composite air pipe body are all screwed with flanges (3), two adjacent composite air pipe bodies are fixedly installed through two flanges (3), a protection mechanism matched with the flanges (3) is arranged between the two adjacent composite air pipe bodies, and a silencing mechanism is arranged in the first rectangular pipe.

2. The composite air duct according to claim 1, wherein the protection mechanism comprises a protection tube (4) and an inner tube (5) sleeved on two adjacent flanges (3), the inner tube (5) is located in the corresponding protection tube (4), four sides of the flange (3) located above in the two adjacent flanges (3) are fixedly connected with a cutting sleeve (6), a first T-shaped fastening bolt (8) is sleeved in the cutting sleeve (6) in a threaded manner, nuts (7) are fixedly connected on the inner walls of the four sides of the inner tube (5), the nuts (7) are sleeved on the corresponding first T-shaped fastening bolts (8) in a threaded manner, a plurality of arc-shaped plates (9) are annularly and rollably mounted on the side wall of the protection tube (4), four rectangular rods (13) are fixedly connected on one side of the arc-shaped plates (9) close to the inner tube (5), the inner tube (5) is slidably sleeved on the corresponding rectangular rods (13), the outside of inner tube (5) is the annular and has seted up a plurality of first grooves (10), a plurality of first grooves (10) set up with a plurality of arc (9) one-to-one that correspond, slidable mounting has movable plate (11) in first groove (10), it is fixed with flexible gasbag (14) to bond between movable plate (11) and the arc (9) that correspond, one side that corresponding arc (9) were kept away from in movable plate (11) and first groove (10) keep away from between its open-ended one side inner wall a plurality of buffer spring (12) of fixedly connected with, the outside of inner tube (5) is the annular and inlays and is equipped with a plurality of shape elastic rubber piece (18) of returning, the shape elastic rubber piece (18) of returning keeps away from one side of inner tube (5) and the lateral wall fixed connection of protective tube (4).

3. The composite air duct according to claim 1, wherein the silencing mechanism comprises a first silencing pipe (21) fixedly sleeved in the first rectangular pipe, a second silencing pipe (23) fixedly sleeved in the first silencing pipe (21), first mounting grooves (29) are formed on the inner walls of four sides of the first silencing pipe (21), a mounting plate (22) is fixedly mounted in the first mounting grooves (29), a plurality of conical holes (24) are formed on one side of the mounting plate (22) far away from the corresponding inner steel plate (20), a plurality of obliquely arranged silencing plates (25) are fixedly connected to the inner walls of two sides of each conical hole (24), two opposite silencing plates (25) positioned in the same conical hole (24) are symmetrically arranged, one side of the conical hole (24) close to the corresponding inner steel plate (20) is provided with silencing cotton (26) which is embedded on the inner wall of one side of the first mounting groove (29) far away from the opening of the first mounting groove.

4. The composite air pipe according to claim 1, wherein one side of the outer steel plate (1) away from the corresponding inner steel plate (20) is provided with a plurality of first thread grooves, second T-shaped fastening bolts (28) are sleeved in the first thread grooves in a threaded manner, the reinforcing ribs (2) are sleeved on the two corresponding second T-shaped fastening bolts (28) in a threaded manner, and the heat insulation block (27) is made of polystyrene.

5. The composite air duct according to claim 2, characterized in that the inner side of the ferrule (6) is provided with an internal thread, which is in threaded connection with the corresponding first T-shaped fastening bolt (8).

6. The composite air pipe according to claim 2, wherein two rectangular grooves are formed in the upper portion and the lower portion of each first groove (10) and are formed in the outer sides of the corresponding inner pipes (5), the inner walls of the rectangular grooves are connected with the corresponding rectangular rods (13) in a sliding mode, the two rectangular rods (13) opposite to each other in the up-down direction are respectively provided with a limiting groove in one side away from each other, limiting blocks are fixedly connected to the inner walls of the two rectangular grooves opposite to each other in the down direction in one side away from each other in the downward direction, and the limiting blocks are connected with the corresponding limiting grooves in a sliding mode.

7. The composite air pipe according to claim 2, wherein the side of the arc-shaped plate (9) far away from the inner pipe (5) is embedded with balls (15), the inner side of the protective pipe (4) is provided with a plurality of ball grooves (19), and the balls (15) are in rolling contact with the inner walls of the corresponding ball grooves (19).

8. The composite air pipe according to claim 2, wherein the top inner wall and the bottom inner wall of the first groove (10) are both provided with a second groove (17), the inner wall of the second groove (17) far away from the opening side is both fixedly connected with a T-shaped slide rail, the top and the bottom of the moving plate (11) are both fixedly connected with a slide block (16), one side of the slide block (16) far away from the corresponding moving plate (11) is provided with a T-shaped slide groove, and the T-shaped slide rail is slidably connected with the corresponding T-shaped slide groove.

9. The composite air pipe according to claim 3, wherein a plurality of second mounting grooves are formed on the inner wall of the first mounting groove (29) far away from the opening, and the inner wall of each second mounting groove is fixedly bonded with the outer side of the corresponding sound-deadening cotton (26).

Technical Field

The invention relates to the technical field of composite air pipes, in particular to a composite air pipe.

Background

The composite air pipe is represented by a rubber-plastic composite air pipe, is made of a rubber-plastic composite heat-insulating material, can comprehensively replace the traditional air pipe, an air valve, an air port, a static pressure box and a heat-insulating material in an air-conditioning air outlet system, and is mostly connected by flanges between two adjacent composite air pipes; the noise reduction effect of current compound tuber pipe is relatively poor, compound tuber pipe can be because of and the pipe wall between the impact produce great noise at the in-process that ventilates, and the junction of two adjacent compound tuber pipes lacks safeguard mechanism, appears revealing the phenomenon because of the rigid impact is great causes two flange joint easily, and then the influence is used, synthesizes above-mentioned condition and improves, therefore we have proposed compound tuber pipe and be used for solving above-mentioned problem.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a composite air pipe.

The invention provides a composite air duct, which comprises a plurality of composite air duct bodies, wherein each composite air duct body comprises four outer steel plates and four inner steel plates, each inner steel plate forms a first rectangular duct, one side, close to each other, of each inner steel plate is arranged as an inclined plane and welded with each other, each inner steel plate is positioned between the four outer steel plates, one side, close to the corresponding outer steel plate, of each inner steel plate is fixedly connected with the corresponding outer steel plate, the same heat insulation block is fixedly connected between the two adjacent outer steel plates, each outer steel plate and the four heat insulation blocks form a second rectangular duct, one side, far away from the corresponding inner steel plate, of each outer steel plate is fastened with a plurality of reinforcing ribs in a threaded manner, flanges are fixedly arranged at the top end and the bottom of each composite air duct body, the two adjacent composite air duct bodies are fixedly arranged through the two flanges, and a protection mechanism matched with the flanges is arranged between the, a silencing mechanism is arranged in the first rectangular pipe.

Preferably, the protection mechanism includes a protection tube and an inner tube sleeved on two adjacent flanges, the inner tube is located in the corresponding protection tube, four sides of the flange located above the adjacent two flanges are fixedly connected with a sleeve, a first T-shaped fastening bolt is sleeved in the sleeve, nuts are fixedly connected to inner walls of the four sides of the inner tube, the nut is sleeved on the corresponding first T-shaped fastening bolt in a threaded manner, a plurality of arc-shaped plates are annularly and rollingly installed on side walls of the protection tube, four rectangular rods are fixedly connected to one side, close to the inner tube, of the arc-shaped plates, the inner tube is slidably sleeved on the corresponding rectangular rods, a plurality of first grooves are annularly formed in the outer side of the inner tube, the plurality of first grooves are arranged in one-to-one correspondence with the corresponding plurality of arc-shaped plates, elastic air bags are fixedly bonded and fixedly arranged between the movable plate and the arc-shaped plate corresponding to the movable plate, one side, far away from the corresponding arc-shaped plate, and a plurality of buffer springs are connected, a plurality of clip-shaped elastic rubber blocks are embedded in the outer side of the inner tube in an annular mode, and one side, far away from the inner tube, of each clip-shaped elastic rubber block is fixedly connected with the side wall of the protection tube.

Preferably, silencing mechanism is including fixed cover establishing the first hush pipe in first rectangle pipe, the intraductal fixed cover of first hush pipe is equipped with the second hush pipe, first mounting groove has all been seted up on four side inner walls of first hush pipe, fixed mounting has the mounting panel in the first mounting groove, a plurality of bell mouths have been seted up to one side that the corresponding interior steel sheet was kept away from to the mounting panel, the acoustical panel that a plurality of slopes of equal fixedly connected with set up on the both sides inner wall of bell mouth, be located two relative acoustical panel symmetries in same bell mouth and set up, one side that the bell mouth is close to the interior steel sheet that corresponds is equipped with inlays the amortization cotton of inlaying on the inner wall of one side that its open.

Preferably, one side of the outer steel plate, which is far away from the corresponding inner steel plate, is provided with a plurality of first thread grooves, second T-shaped fastening bolts are sleeved in the first thread grooves in a threaded manner, the reinforcing ribs are sleeved on the two corresponding second T-shaped fastening bolts in a threaded manner, and the heat preservation block is made of polystyrene.

Preferably, the inner side of the sleeve is provided with an internal thread, and the internal thread is in threaded connection with the corresponding first T-shaped fastening bolt.

Preferably, the top and the below in first groove all are equipped with two rectangular channels of seting up in the inner tube outside that corresponds, the inner wall of rectangular channel and the outside sliding connection of the rectangular rod that corresponds, and the spacing groove has all been seted up to two relative one sides that rectangular rod kept away from each other from top to bottom, equal fixedly connected with stopper on the one side inner wall that two relative rectangular channels kept away from each other downwards, stopper and the spacing groove sliding connection that corresponds.

Preferably, the ball is embedded in one side of the arc-shaped plate, which is far away from the inner tube, the inner side of the protective tube is provided with a plurality of ball grooves, and the ball is in rolling contact with the inner walls of the corresponding ball grooves.

Preferably, the second grooves are formed in the inner wall of the top and the inner wall of the bottom of the first groove, the inner wall of one side, away from the opening, of each second groove is fixedly connected with a T-shaped sliding rail, the top and the bottom of the movable plate are fixedly connected with sliding blocks, one side, away from the corresponding movable plate, of each sliding block is provided with a T-shaped sliding groove, and the T-shaped sliding rails are connected with the corresponding T-shaped sliding grooves in a sliding mode.

Preferably, a plurality of second mounting grooves are formed in the inner wall of one side, away from the opening, of the first mounting groove, and the inner wall of each second mounting groove is fixedly bonded with the outer side of the corresponding silencing cotton.

Compared with the prior art, the invention has the beneficial effects that:

the first silencing pipe, the mounting plate, the second silencing pipe, the conical hole, the silencing plates, the silencing cotton, the heat preservation block and the second T-shaped fastening bolt are matched with the first mounting groove, when the composite air pipe body is ventilated, the composite air pipe body collides with the side wall of the second silencing pipe to generate noise, the generated noise is transmitted to the corresponding silencing plates through the second silencing pipe, one part of the noise on the silencing plates is reflected to the other corresponding silencing plate, the other part of the noise is reflected to the next silencing plate, the transmission rate of noise sound waves is reduced through multiple reflection, the multiple reflection of the silencing plates and the matching of the second silencing pipes are utilized, the noise is gradually reduced, the reduced noise enters the silencing cotton to be absorbed, and a good noise reduction effect is achieved under the action of multiple noise reduction and absorption;

through the cooperation of the outer steel plate, the reinforcing rib, the flange, the protective pipe, the inner pipe, the clamping sleeve, the nut, the first T-shaped fastening bolt, the arc-shaped plate, the first groove, the movable plate, the buffer spring, the rectangular rod, the elastic air bag, the ball, the slide block, the second groove, the clip elastic rubber block, the ball groove and the inner steel plate, the reinforcing rib is arranged to reinforce and protect the outer side of the composite air pipe body, when the protective pipe is impacted by external impact force, the protective pipe firstly impacts the outer side of the protective pipe, when the protective pipe is impacted by front impact force, the protective pipe compresses the clip elastic rubber block in front and stretches the clip elastic rubber block in back, no matter which direction the protective pipe is impacted by front impact force, the protective pipe can extrude the corresponding ball to move away from the direction of the impact force, the extruded ball drives the corresponding arc-shaped plate to move towards the direction close to the inner pipe and extrudes the elastic air bag, make the elasticity gasbag take place deformation, the elasticity gasbag of discovery deformation extrudees the corresponding movable plate and removes and compress buffer spring to the direction that is close to the flange, under the elastic force effect between buffer spring and elasticity gasbag, can realize all around multidirectional alleviating the collision power, reach the multidirectional buffering protection of flange.

The multi-directional buffer force-unloading protection device is reasonable in design, facilitates effective noise reduction of generated noise in the ventilation process, facilitates multi-directional buffer force-unloading protection of the flanges, reduces leakage risk caused by the fact that a gap is generated between two adjacent flanges due to large collision force, meets use requirements, and is beneficial to use.

Drawings

FIG. 1 is a schematic structural diagram of a composite air duct according to the present invention;

FIG. 2 is an enlarged cross-sectional view of portion A of FIG. 1;

FIG. 3 is an enlarged schematic view of portion B of FIG. 2;

FIG. 4 is a schematic top view of the inner tube, the outer tube, the clip-shaped elastic rubber block, the arc-shaped plate, the balls, the elastic air bag, the moving plate, the buffer spring and the rectangular rod connecting piece of the composite air duct according to the present invention;

FIG. 5 is a schematic top view cross-sectional structure view of a first rectangular pipe, a second rectangular pipe, a silencing mechanism, a reinforcing rib and a thermal insulation block connecting piece of the composite air duct provided by the present invention;

FIG. 6 is an enlarged schematic view of a portion C of FIG. 5;

fig. 7 is a perspective view of a first rectangular pipe, a second rectangular pipe, a flange, a reinforcing rib, and a second muffler pipe connector of the composite air duct according to the present invention.

In the figure: the damping device comprises an outer steel plate 1, a reinforcing rib 2, a flange 3, a protective pipe 4, an inner pipe 5, a clamping sleeve 6, a nut 7, a first T-shaped fastening bolt 8, an arc-shaped plate 9, a first groove 10, a moving plate 11, a buffer spring 12, a rectangular rod 13, an elastic air bag 14, a ball 15, a slider 16, a second groove 17, an elastic rubber block 18 in a shape of Chinese character 'hui', a ball groove 19, an inner steel plate 20, a first damping pipe 21, a mounting plate 22, a second damping pipe 23, a conical hole 24, a damping plate 25, damping cotton 26, a heat insulation block 27, a second T-shaped fastening bolt 28 and a first mounting groove 29.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Examples

Referring to fig. 1-7, the present embodiment provides a composite air duct, which includes a plurality of composite air duct bodies, each of the composite air duct bodies includes four outer steel plates 1 and four inner steel plates 20, each of the four inner steel plates 20 forms a first rectangular duct, one side of each of the four inner steel plates 20, which is close to each other, is provided with an inclined plane and welded to each other, the four inner steel plates 20 are located between the four outer steel plates 1, one side of each of the inner steel plates 20, which is close to the corresponding outer steel plate 1, is fixedly connected to the outer steel plate 1, the same heat insulation block 27 is fixedly connected between the two adjacent outer steel plates 1, the four outer steel plates 1 and the four heat insulation blocks 27 form a second rectangular duct, one side of each of the outer steel plates 1, which is far from the corresponding inner steel plate 20, is fastened with a plurality of reinforcing ribs 2 by screw threads, flanges 3 are respectively fixed to the top and the, the invention has reasonable design, is convenient for effectively reducing noise generated in the ventilation process, is convenient for protecting the flange 3 from multidirectional buffering and force unloading, reduces the leakage risk caused by the gap generated between the two adjacent flanges 3 due to large impact force, meets the use requirement and is beneficial to use.

In this embodiment, the protection mechanism includes a protection tube 4 and an inner tube 5 sleeved on two adjacent flanges 3, the inner tube 5 is located in the corresponding protection tube 4, four sides of the flange 3 located above in the two adjacent flanges 3 are fixedly connected with a cutting sleeve 6, the cutting sleeve 6 is internally threaded and sleeved with a first T-shaped fastening bolt 8, the inner walls of the four sides of the inner tube 5 are fixedly connected with nuts 7, the nuts 7 are threaded and sleeved on the corresponding first T-shaped fastening bolts 8, a plurality of arc-shaped plates 9 are annularly and rollably installed on the side wall of the protection tube 4, one side of the arc-shaped plate 9 close to the inner tube 5 is fixedly connected with four rectangular rods 13, the inner tube 5 is slidably sleeved on the corresponding rectangular rods 13, the outer side of the inner tube 5 is annularly provided with a plurality of first grooves 10, the plurality of first grooves 10 are arranged in one-to-one correspondence with the corresponding plurality of arc-shaped plates 9, a movable, an elastic air bag 14 is fixedly bonded between the movable plate 11 and the corresponding arc plate 9, a plurality of buffer springs 12 are fixedly connected between one side of the movable plate 11 far away from the corresponding arc plate 9 and the inner wall of one side of the first groove 10 far away from the opening of the first groove, a plurality of clip-shaped elastic rubber blocks 18 are annularly embedded on the outer side of the inner pipe 5, one side of the clip-shaped elastic rubber blocks 18 far away from the inner pipe 5 is fixedly connected with the side wall of the protective pipe 4, the silencing mechanism comprises a first silencing pipe 21 fixedly sleeved in a first rectangular pipe, a second silencing pipe 23 is fixedly sleeved in the first silencing pipe 21, first mounting grooves 29 are respectively formed on the inner walls of the four sides of the first silencing pipe 21, a mounting plate 22 is fixedly mounted in the first mounting grooves 29, a plurality of conical holes 24 are formed on one side of the mounting plate 22 far away from the corresponding inner steel plate 20, and a plurality of obliquely arranged silencing plates 25 are fixedly connected on the inner walls of the two, two opposite sound-absorbing plates 25 positioned in the same conical hole 24 are symmetrically arranged, and sound-absorbing cotton 26 embedded on the inner wall of the first mounting groove 29 on the side far away from the opening of the first mounting groove is arranged on one side of the conical hole 24 close to the corresponding inner steel plate 20;

one side of the outer steel plate 1 far away from the corresponding inner steel plate 20 is provided with a plurality of first thread grooves, the threads of the first thread grooves are sleeved with second T-shaped fastening bolts 28, the reinforcing ribs 2 are sleeved on the corresponding two second T-shaped fastening bolts 28 in a threaded manner, the heat insulation block 27 is made of polystyrene, the inner side of the cutting sleeve 6 is provided with internal threads, the internal threads are in threaded connection with the corresponding first T-shaped fastening bolts 8, two rectangular grooves which are arranged on the outer sides of the corresponding inner tubes 5 are arranged above and below the first grooves 10, the inner walls of the rectangular grooves are in sliding connection with the outer sides of the corresponding rectangular rods 13, one sides of the two rectangular rods 13 which are opposite up and down and far away from each other are provided with limiting grooves, the inner walls of the two rectangular grooves which are opposite down and far away from each other are fixedly connected with limiting blocks, the limiting blocks are in sliding connection with the corresponding limiting grooves, one side of the arc-shaped plate 9 far, the inner side of the protective tube 4 is provided with a plurality of ball grooves 19, the balls 15 are in rolling contact with the inner walls of the corresponding ball grooves 19, the inner walls of the top and the bottom of the first groove 10 are respectively provided with a second groove 17, the inner wall of one side of the second groove 17 far away from the opening of the second groove is fixedly connected with a T-shaped slide rail, the top and the bottom of the movable plate 11 are respectively and fixedly connected with a slide block 16, one side of the slide block 16 far away from the corresponding movable plate 11 is provided with a T-shaped slide groove, the T-shaped slide rail is in sliding connection with the corresponding T-shaped slide groove, the inner wall of one side of the first installation groove 29 far away from the opening is provided with a plurality of second installation grooves, and the inner walls of the second installation grooves are fixedly bonded with the outer sides of the corresponding noise reduction cotton 26. The use requirement is met, and the use is facilitated.

In the embodiment, when the composite air duct body is used for ventilating, the force blown by the wind collides with the side wall of the second muffling pipe 23 to generate noise, the generated noise is transmitted into the plurality of tapered holes 24 through the second muffling pipe 23, the second muffling pipe 23 performs primary noise reduction on the generated noise, the reduced noise is transmitted to the corresponding muffling plate 25, the muffling plate 25 reduces the reduced noise again, a part of the noise on the muffling plate 25 is reflected to the other corresponding muffling plate 25, and the other part of the noise is reflected to the next muffling plate 25, meanwhile, in the process of sound wave reflection, the transmission rate of the refracted noise sound wave is reduced, the noise is gradually reduced by utilizing the multiple reflection of the plurality of muffling plates 25, the reduced noise enters the muffling cotton 26, the muffling cotton 26 absorbs the noise, and under the action of multiple noise reduction and absorption, a good noise reduction effect is achieved, and the influence caused by large noise is reduced;

the arrangement of the reinforcing ribs 2 strengthens and protects the outer side of the composite air duct body, when the flange 3 is subjected to external impact force, the impact force firstly collides with the outer side of the protective tube 4, when the flange is subjected to the impact force in the front, the protective tube 4 compresses the front clip-shaped elastic rubber block 18 and stretches the rear clip-shaped elastic rubber block 18, no matter which direction the protective tube 4 is subjected to, the protective tube 4 can displace towards the direction far away from the impact force, the protective tube 4 simultaneously extrudes the balls 15 in the direction of the impact force when moving, the extruded balls 15 displace and drive the arc-shaped plate 9 to move towards the direction close to the inner tube 5, the arc-shaped plate 9 drives the corresponding rectangular rod 13 to slide in the rectangular groove, the arc-shaped plate 9 moves to extrude the corresponding elastic air bag 14, and the extrusion force enables the elastic air bag 14 to deform, meanwhile, the corresponding movable plate 11 is extruded by the deformed elastic air bags 14, the extruding force drives the movable plate 11 to move towards the direction close to the corresponding flange 3, the movable plate 11 drives the corresponding sliding block 16 to slide on the T-shaped sliding rail, the corresponding buffer springs 12 are compressed while the movable plate 11 moves, and under the elastic action between the buffer springs 12 and the elastic air bags 14, the hard collision impact force is relieved, the collision force can be relieved in all directions, so that the purpose of multidirectional buffer protection of the flange 3 is realized, and the leakage risk caused by gaps generated between two adjacent flanges 3 due to the fact that the collision force is large is reduced.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.