Nylon pipeline

Abstract

The utility model relates to the technical field of pipelines, in particular to a nylon pipeline which comprises a pipe body assembly and a connector assembly connected with one end of the pipe body assembly, the pipe body assembly comprises a metal pipe, an insulating layer is arranged outside the metal pipe, a heat preservation layer is arranged inside the metal pipe, and an anti-corrosion layer is arranged inside the heat preservation layer. The connector assembly comprises a plastic pipe and a metal head and a retainer which are arranged in the plastic pipe, a threaded column is arranged on the left side of the metal head, a sealing ring is arranged in the end, close to the metal head, of the retainer, and a spring ring is arranged on the right side of the sealing ring. Grooves are arranged to be elastically connected with spring balls on the retainers so that the retainers can be connected with the connecting columns and the pipe body assembly, the spring columns are arranged in the middles of the retainers so that the buttons can elastically move on the outer sides of the spring columns, and meanwhile the protruding blocks extrude and leave the spring balls so that the retainers and the pipe body assembly can be rapidly fixed and separated.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, and specifically relates to a nylon pipeline. Background Technique

[0002] Nylon has various characteristics, such as wear resistance, smooth surface, soft and easy to bend, corrosion resistance, dimensional stability, small permeability, high resistance, good insulation, long service life, good heat resistance, etc. Nylon pipes are widely used in the fields of water treatment, petrochemical industry, tires, wheels, agriculture, rubber products, medical devices, automobiles, tractors, etc. due to their excellent physical and mechanical properties.

[0003] The utility model with the publication number CN2729484Y relates to a cast nylon pipeline with a flange. It consists of a flange and a straight pipe. The straight pipe or other pipe fittings are integrally formed with the flange. There is a cylindrical table on the flange surface, and several grooves are provided on the cylindrical table. The shape of the grooves is "V"-shaped grooves, and an included angle is formed at the bottom. It has the advantages of simple production, good corrosion resistance and wear resistance, and can improve strength and compressive capacity, eliminate the internal force generated by expansion or contraction, and greatly improve the anti-fatigue ability and service life of the pipeline.

[0004] The above technical solution is convenient for construction and installation, has better sealing performance, is non-toxic and has no secondary pollution, has a low cost and low maintenance cost, and is widely used in industries such as metallurgical mines, chemical industry, petroleum, and papermaking. However, the flange cannot be quickly connected and separated, and the inner wall of the pipeline is not designed with a structure to increase the contact area with the liquid in the pipeline, and the pipe body is not designed with a multi-layer structure for protection. Content of the Utility Model

[0005] The purpose of the utility model is to provide a nylon pipeline to solve the problems proposed in the above background technique that the flange cannot be quickly connected and separated, the inner wall of the pipeline is not designed with a structure to increase the contact area with the liquid in the pipeline, and the pipe body is not designed with a multi-layer structure for protection.

[0006] To achieve the above purpose, the utility model provides the following technical solution:

[0007] A nylon pipeline includes a pipe body assembly and a joint assembly connected to one end of the pipe body assembly. The pipe body assembly includes a metal pipe, an insulating layer is provided outside the metal pipe, a heat-insulating layer is provided inside the metal pipe, and an anti-corrosion layer is provided inside the heat-insulating layer. The joint assembly includes a plastic pipe, and a metal head and a retainer are provided inside the plastic pipe. A threaded column is provided on the left side of the metal head. A sealing ring is provided inside the retainer near one end of the metal head. A spring ring is provided on the right side of the sealing ring. A washer is provided on the right side of the spring ring. A button is provided on the right side of the retainer, and the button is provided on the right side of the pipe body assembly.

[0008] Preferably, the inner diameter of the insulating layer is adapted to the diameter of the metal pipe, and the insulating layer is closely adhesively bonded to the metal pipe.

[0009] In the present utility model, the insulating layer is an insulating material layer, which helps to prevent the conductive influence between the internal layers, and at the same time reduces the large energy consumption caused by conduction. The adhesive fixation realizes the close fitting protection of the pipe body.

[0010] Preferably, the inner diameter of the metal pipe is adapted to the outer diameter of the heat-insulating layer, and the metal pipe is adhesively fixed to the heat-insulating layer.

[0011] In the present utility model, the nylon pipe is made of nylon resin, which is not easy to break or fracture, helps to maintain a stable conveying effect for a long time, and the adhesive fixation of the metal pipe and the heat-insulating layer increases the overall structural strength.

[0012] Preferably, the inner diameter of the heat-insulating layer is adapted to the diameter of the anti-corrosion layer, the heat-insulating layer is closely adhesively bonded to the anti-corrosion layer, and an inner ring is provided inside the anti-corrosion layer.

[0013] In the present utility model, the heat-insulating layer is provided to reduce the influence of the external environment on the conveyed substance during work, which helps to avoid the freezing of the conveyed substance in the pipeline and maintain the normal production state. The adhesive fixation realizes the close fitting protection of the heat-insulating layer. The anti-corrosion layer is provided to help reduce the corrosion influence of the internal conveyed solution on the heat-insulating layer and the metal pipe, and improve the applicability of the nylon pipe in different temperature working environments. The inner ring is set in a wave shape, which is convenient to increase the contact area with the conveyed substance in the pipeline compared with the traditional circle. The wave shape will generate forces and eddies in different directions during the movement of the conveyed substance, which helps to slow down the accumulation speed of dirt inside the pipeline.

[0014] Preferably, one end of the threaded post is welded and fixed to the metal head, and the outer ring of the cage is adhesively fixed to the inner wall of the plastic pipe.

[0015] In the present utility model, the threaded post is provided to facilitate the threaded connection with the joint assembly with bolts, realizing quick fixation and disassembly. The welding fixation increases the overall structural strength of the threaded post and the metal head. The adhesive fixation increases the overall structural stability of the cage and the plastic pipe. The sealing ring is provided to facilitate reducing the possibility of leakage of the conveyed substance inside the pipeline. The adhesive fixation increases the overall structural stability of the cage and the sealing ring. The outer ring size of the right end of the metal head matches the inner ring of the plastic pipe, and the metal head is closely fitted to the inner wall of the plastic pipe, and the metal head is adhesively fixed to the plastic pipe. The metal head is provided to facilitate connecting the threaded post and the plastic pipe on the left and right sides respectively. The welding fixation increases the overall structural strength of the metal head and the plastic pipe.

[0016] Preferably, one end of the sealing ring is adhesively fixed to the spring ring, and one end of the spring ring is adhesively fixed to the washer.

[0017] In the present utility model, bonding fixation increases the overall structural strength of the sealing ring and the spring ring. Arranging a spring ring between the sealing ring and the washer helps slow down the speed of the spring ring's position deviation and reduce the wear degree of the spring ring's edge.

[0018] Preferably, the outer rings of the spring ring and the washer are both adhesively fixed to the inside of the cage. The outer diameter of the cage is adapted to the inner ring of the button. Spring columns are equidistantly arranged at the circular ring part in the middle of the cage. One end of each spring column is adhesively fixed to the middle side of the cage, and the other end of the spring column is adhesively fixed to the button.

[0019] In the present utility model, bonding fixation increases the overall structural stability of the spring ring, the washer and the cage. The outer ring of the cage is adhesively fixed to the inner wall of the plastic pipe. Bonding fixation increases the overall structural strength of the plastic pipe and the cage. Installing the cage between the plastic pipe and the spring ring is convenient for bearing a certain amount of external force and pressure, preventing the structure inside the cage from being damaged due to external force impact during use. The spring ring is provided with a number of annular and equidistantly arranged spring pieces. The spring pieces have a certain elasticity and can realize quick clamping and separation of the pipe body assembly. Bonding fixation respectively increases the overall structural strength of the spring column with the cage and the button. Arranging a spring column at the connection between the cage and the button realizes the back-and-forth movement of the button on the outer ring of the cage.

[0020] Preferably, square grooves are provided at both the upper and lower ends of the button. A spring ball is arranged inside each square groove. Both ends of the spring ball are adhesively fixed to the inner wall of the square groove.

[0021] In the present utility model, arranging the square groove is convenient for placing the spring ball. Bonding fixation increases the structural strength of the spring ball and the inner wall of the square groove.

[0022] Preferably, convex blocks are symmetrically arranged on the upper and lower inner walls of the right port of the button. The convex blocks are adhesively fixed to the inside of the button. A connecting column is provided at one end of the pipe body assembly close to the button. Grooves are opened at both the upper and lower ends of the connecting column.

[0023] In the present utility model, arranging the convex blocks realizes elastic connection with the spring balls in the square grooves. Bonding fixation increases the overall structural strength of the convex blocks and the inside of the button. Arranging the connecting column realizes the connection between the pipe body assembly and the button. The left end of the connecting column is adhesively fixed to the pipe body assembly. Bonding fixation increases the overall structural stability of the connecting column and the pipe body assembly. The shape of the inner wall of the groove matches that of the spring ball. Moving the button towards the plastic pipe direction, the button squeezes the spring ball on the spring column and moves from inside the cage to the square groove. The connecting column moves into the spring ring. The elasticity of the spring ring itself drives the spring pieces to contract and connect with the connecting column. Moving the button towards the pipe body assembly direction, the button drives the spring column to rebound. The convex block squeezes the spring ball to be stuck into the groove from the square groove. The button, the cage and the spring ring realize double fixation of the connecting column and the pipe body assembly.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0025] 1. The present utility model connects and fixes the nylon pipe body through the setting of the joint assembly, realizes the connection with the connecting column through the setting of the spring coil, realizes the connection of the cage with the connecting column and the pipe body assembly through the elastic connection of the groove with the spring ball on the cage, realizes the elastic movement of the button outside the spring column through the setting of the spring column in the middle of the cage, and at the same time, the convex block squeezes and leaves the spring ball to realize the quick fixation and separation of the cage and the pipe body assembly;

[0026] 2. The present utility model conducts multi-layer protection on the nylon pipe body through the setting of the pipe body assembly. The nylon pipe body is made of nylon resin and is not easy to break or fracture. With the cooperation of the insulating layer, it helps to prevent the leakage and conduction between the internal layers from affecting, and at the same time reduces the large energy consumption caused by conduction. With the cooperation of the heat preservation layer, the overall heat preservation and heat insulation effect is increased, and the influence of the change of the external environmental temperature on the use of the anti-corrosion layer is reduced. The setting of the anti-corrosion layer helps to reduce the deformation inside to avoid affecting the use, improves the applicability of the nylon pipe body in different temperature working environments, and the inner ring is set in a wave shape, which is convenient to increase the contact area with the substances conveyed in the pipeline compared with the traditional circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the nylon pipeline of the present utility model;

[0028] Figure 2 is a schematic diagram of the pipe body assembly of the present utility model;

[0029] Figure 3 is a schematic diagram of the explosion structure of the nylon pipeline of the present utility model.

[0030] The meanings of each label in the figure are as follows:

[0031] 1. Pipe body assembly; 11. Insulating layer; 12. Metal pipe; 13. Heat preservation layer; 14. Anti-corrosion layer; 140. Inner ring;

[0032] 2. Joint assembly; 20. Plastic pipe; 200. Button; 201. Convex block; 202. Cage; 203. Spring ball; 204. Spring column; 205. Washer; 206. Spring coil; 207. Sealing ring; 21. Metal head; 210. Threaded column; 22. Connecting column; 220. Groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] Please refer to Figures 1 - 3 , this embodiment provides a technical solution:

[0035] A nylon pipe, including a pipe body assembly 1 and a joint assembly 2 connected to one end of the pipe body assembly 1. The joint assembly 2 includes a plastic pipe 20, and inside the plastic pipe 20, there is a metal head 21 and a cage 202. On the left side of the metal head 21, there is a threaded post 210. Inside one end of the cage 202 close to the metal head 21, there is a sealing ring 207. On the right side of the sealing ring 207, there is a spring ring 206. On the right side of the spring ring 206, there is a washer 205. On the right side of the cage 202, there is a button 200. On the right side of the button 200, there is the pipe body assembly 1. One end of the threaded post 210 is welded and fixed to the metal head 21, and the outer ring of the cage 202 is adhesively fixed to the inner wall of the plastic pipe 20.

[0036] In the present utility model, the threaded post 210 is provided to facilitate threaded connection with the joint assembly 2 with bolts, realizing quick fixation and disassembly. Welding fixation increases the overall structural strength of the threaded post 210 and the metal head 21. Adhesive fixation increases the overall structural stability of the cage 202 and the plastic pipe 20. The sealing ring 207 is provided to facilitate reducing the possibility of leakage of the substances conveyed inside the pipe. Adhesive fixation increases the overall structural stability of the cage 202 and the sealing ring 207. The outer diameter of the right end of the metal head 21 matches the inner ring of the plastic pipe 20. The metal head 21 is closely attached to the inner wall of the plastic pipe 20, and the metal head 21 is adhesively fixed to the plastic pipe 20. The metal head 21 is provided to facilitate connecting the threaded post 210 and the plastic pipe 20 on the left and right sides respectively. Welding fixation increases the overall structural strength of the metal head 21 and the plastic pipe 20.

[0037] In addition, one end of the sealing ring 207 is adhesively fixed to the spring ring 206, and one end of the spring ring 206 is adhesively fixed to the washer 205.

[0038] In the present utility model, adhesive fixation increases the overall structural strength of the sealing ring 207 and the spring ring 206. The spring ring 206 is provided between the sealing ring 207 and the washer 205, which helps to slow down the speed of the spring ring 206 shifting in position and at the same time reduces the wear degree of the edge of the spring ring 206.

[0039] Among them, the outer rings of the coil spring 206 and the washer 205 are both adhesively fixed inside the cage 202. The outer ring size of the cage 202 is adapted to the inner ring of the button 200. Spring posts 204 are equidistantly arranged at the circular ring part in the middle of the cage 202. One end of each spring post 204 is adhesively fixed to the middle side of the cage 202, and the other end of the spring post 204 is adhesively fixed to the button 200.

[0040] In the present utility model, the adhesive fixation increases the overall structural stability of the coil spring 206, the washer 205 and the cage 202. The outer ring of the cage 202 is adhesively fixed to the inner wall of the plastic tube 20, and the adhesive fixation increases the overall structural strength of the plastic tube 20 and the cage 202. The cage 202 is installed between the plastic tube 20 and the coil spring 206 to facilitate bearing certain external forces and pressures, preventing the internal structure of the cage 202 from being damaged due to external force impacts during use. A number of annularly equidistant spring pieces are provided on the coil spring 206. The spring pieces have a certain elasticity, and can realize the rapid clamping and separation of the tube body assembly 1. The adhesive fixation respectively increases the overall structural strength of the spring post 204 and the cage 202, and the button 200. The spring post 204 is arranged at the connection between the cage 202 and the button 200 to realize the back-and-forth movement of the button 200 on the outer ring of the cage 202.

[0041] Secondly, square grooves are provided at both the upper and lower ends of the button 200, and a spring ball 203 is arranged inside each square groove. Both ends of the spring ball 203 are adhesively fixed to the inner wall of the square groove.

[0042] In the present utility model, the square grooves are provided to facilitate the placement of the spring balls 203, and the adhesive fixation increases the structural strength of the spring balls 203 and the inner wall of the square grooves.

[0043] Furthermore, convex blocks 201 are symmetrically arranged on the upper and lower inner walls of the right port of the button 200. The convex blocks 201 are adhesively fixed to the inside of the button 200. A connecting column 22 is provided at one end of the tube body assembly 1 close to the button 200, and grooves 220 are formed at both the upper and lower ends of the connecting column 22.

[0044] In the present utility model, a bump 201 is provided to achieve elastic connection with a spring ball 203 in a square groove. Adhesive fixation is used to increase the overall structural strength of the bump 201 and the interior of the button 200. A connecting column 22 is provided to connect the tube body assembly 1 and the button 200. The left end of the connecting column 22 is adhesively fixed to the tube body assembly 1, and adhesive fixation is used to increase the overall structural stability of the connecting column 22 and the tube body assembly 1. The shape of the inner wall of the groove 220 matches that of the spring ball 203. When the button 200 is moved towards the plastic tube 20, the button 200 presses the spring column 204 to drive the spring ball 203 thereon to move from inside the cage 202 into the square groove. The connecting column 22 moves into the spring coil 206. The elasticity of the spring coil 206 itself drives the spring piece to contract and connect with the connecting column 22. When the button 200 is moved towards the tube body assembly 1, the button 200 drives the spring column 204 to rebound. The bump 201 presses the spring ball 203 to snap from the square groove into the groove 220, and the button 200, the cage 202, and the spring coil 206 achieve double fixation of the connecting column 22 and the tube body assembly 1.

[0045] Specifically, the tube body assembly 1 includes a metal tube 12. An insulating layer 11 is provided outside the metal tube 12, a heat-insulating layer 13 is provided inside the metal tube 12, and an anti-corrosion layer 14 is provided inside the heat-insulating layer 13. The inner diameter of the insulating layer 11 is adapted to the diameter of the metal tube 12, and the insulating layer 11 is closely adhesively fitted with the metal tube 12. The inner diameter of the metal tube 12 is adapted to the outer diameter of the heat-insulating layer 13, and the metal tube 12 is adhesively fixed to the heat-insulating layer 13.

[0046] In the present utility model, the insulating layer 11 is an insulating material layer, which helps to prevent the conductive influence between the internal layers and at the same time reduces the large energy consumption caused by conduction. Adhesive fixation is used to achieve tight fitting and protection of the tube body. The nylon tube is made of nylon resin, is not easily broken or fractured, and helps to maintain a stable conveying effect for a long time. The adhesive fixation of the metal tube 12 and the heat-insulating layer 13 increases the overall structural strength.

[0047] It is worth supplementing that the inner diameter of the heat-insulating layer 13 is adapted to the diameter of the anti-corrosion layer 14, and the heat-insulating layer 13 is closely adhesively fitted with the anti-corrosion layer 14. An inner ring 140 is provided inside the anti-corrosion layer 14.

[0048] In the present utility model, the heat-insulating layer 13 is provided to reduce the influence of the external environment during operation on the conveyed substance, which helps to prevent the substance conveyed in the pipeline from freezing and maintain the normal production state. Adhesive fixation is used to achieve tight fitting and protection of the heat-insulating layer 13. The anti-corrosion layer 14 is provided to help reduce the corrosion effect of the solution conveyed inside on the heat-insulating layer 13 and the metal tube 12, and improve the applicability of the nylon tube in working environments at different temperatures. The inner ring 140 is set in a wavy shape, which is convenient for increasing the contact area with the substance conveyed in the pipeline compared with the traditional circle. The wavy shape will cause the conveyed substance to generate forces and eddies in different directions during movement, which helps to slow down the accumulation speed of dirt inside the pipeline.

[0049] When the nylon pipe of this embodiment is in use, the user first bonds the heat-insulating layer 13 to the outer surface of the outer circle of the anti-corrosion layer 14, forms the shape of the inner circle 140 inside the anti-corrosion layer 14, the metal pipe 12 is correspondingly bonded to the outer surface of the outer circle of the heat-insulating layer 13, and the insulating layer 11 is tightly bonded to the outer wall of the metal pipe 12. The insulating layer 11 helps to prevent the conductive influence between the internal layers, and at the same time reduces the large energy consumption caused by conduction. The cooperation of the metal pipe 12 reduces the damage influence caused by leakage and conduction. The heat-insulating layer 13 initially insulates and heats the interior. The left end of the pipe body assembly 1 is adhesively fixed to the connecting column 22. Grooves 220 are opened at the upper and lower ends of the connecting column 22. Then, the left port of the plastic pipe 20 is adhesively fixed to the metal head 21 and the threaded column 210 welded to the metal head 21. A cage 202 is adhesively fixed inside the plastic pipe 20. The size of the right end of the cage 202 matches the size of the plastic pipe 20. The right end of the cage 202 is in close fit with the right end of the plastic pipe 20. Inside the cage 202, a sealing ring 207, a spring ring 206 and a washer 205 are adhesively fixed in sequence from left to right. Square grooves are opened at the upper and lower ends of the cage 202. The inner wall of the square groove is adhesively fixed to the spring ball 203. The spring columns 204 are distributed at equal intervals in a ring shape, and the two ends are respectively adhesively fixed to the button 200 and the cage 202. The inner right port of the button 200 is adhesively fixed to the convex block 201;

[0050] The user inserts the pipe body assembly 1 into the cage 202 through operation, moves the button 200 towards the plastic pipe 20. The button 200 squeezes the spring column 204 to drive the spring ball 203 thereon to move from inside the cage 202 into the square groove. The connecting column 22 moves into the spring ring 206. The elasticity of the spring ring 206 itself drives the spring piece to contract and connect with the connecting column 22. Move the button 200 towards the pipe body assembly 1. The button 200 drives the spring column 204 to rebound. The convex block 201 squeezes the spring ball 203 to snap into the groove 220 from the square groove. The button 200, the cage 202 and the spring ring 206 achieve double fixation of the connecting column 22 and the pipe body assembly 1. When it is necessary to remove the connecting column 22 and the pipe body assembly 1 from the cage 202, move the button 200 towards the plastic pipe 20. The button 200 drives the spring column 204 to tighten. The convex block 201 reduces the pressure on the spring ball 203 to retract from the groove 220 into the square groove, realizing the quick removal of the pipe body assembly 1.

Claims

1. A nylon pipe, comprising a pipe body assembly (1) and a joint assembly (2) connected to one end of the pipe body assembly (1), characterized in that: The pipe body assembly (1) comprises a metal pipe (12), an insulating layer (11) is provided on the outside of the metal pipe (12), a heat-insulating layer (13) is provided on the inside of the metal pipe (12), and an anti-corrosion layer (14) is provided on the inside of the heat-insulating layer (13); the joint assembly (2) comprises a plastic pipe (20), and a metal head (21) and a retaining frame (202) are provided on the inside of the plastic pipe (20); a threaded column (210) is provided on the left side of the metal head (21), a sealing ring (207) is provided on the inside of one end of the retaining frame (202) close to the metal head (21), a spring ring (206) is provided on the right side of the sealing ring (207), a gasket (205) is provided on the right side of the spring ring (206), a button (200) is provided on the right side of the retaining frame (202), and the pipe body assembly (1) is provided on the right side of the button (200).

2. The nylon pipe according to claim 1, characterized in that: The inner diameter of the insulating layer (11) is matched to the diameter of the metal tube (12), and the insulating layer (11) and the metal tube (12) are tightly bonded and matched.

3. The nylon pipe according to claim 1, characterized in that: The inner diameter of the metal tube (12) is matched to the outer diameter of the thermal insulation layer (13), and the metal tube (12) and the thermal insulation layer (13) are bonded and fixed.

4. The nylon pipe according to claim 1, characterized in that: The inner diameter of the thermal insulation layer (13) is matched with the diameter of the anti-corrosion layer (14); the thermal insulation layer (13) and the anti-corrosion layer (14) are tightly bonded and matched; an inner ring (140) is provided inside the anti-corrosion layer (14).

5. The nylon pipe according to claim 1, characterized in that: One end of the threaded column (210) is welded and fixed to the metal head (21), and the outer ring of the retaining frame (202) is bonded and fixed to the inner wall of the plastic tube (20).

6. The nylon pipe according to claim 1, characterized in that: One end of the sealing ring (207) is bonded and fixed to the spring ring (206), and the other end of the spring ring (206) is bonded and fixed to the gasket (205).

7. The nylon pipe according to claim 1, characterized in that: The outer rings of the spring ring (206) and the washer (205) are both bonded and fixed to the inside of the retainer (202); the size of the outer ring of the retainer (202) matches the inner ring of the button (200); spring columns (204) are arranged at equal intervals on the circular ring in the middle of the retainer (202); one end of the spring column (204) is bonded and fixed to the middle side of the retainer (202), and the other end of the spring column (204) is bonded and fixed to the button (200).

8. The nylon pipe according to claim 1, characterized in that: The button (200) is provided with square grooves at both upper and lower ends, and a spring ball (203) is provided inside each of the square grooves. Both ends of the spring ball (203) are bonded and fixed to the inner wall of the groove.

9. The nylon pipe according to claim 1, characterized in that: The inner wall of the right port of the button (200) is symmetrically provided with protrusions (201) at the top and bottom, and the protrusions (201) are bonded and fixed to the inside of the button (200). The tube body assembly (1) is provided with a connecting column (22) at one end close to the button (200), and the connecting column (22) is provided with grooves (220) at both the top and bottom ends.

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