CN113294621A

CN113294621A - Stainless steel pipe cap

Info

Publication number: CN113294621A
Application number: CN202110545194.3A
Authority: CN
Inventors: 胡勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-08-24

Abstract

The invention discloses a stainless steel pipe cap, belonging to the field of stainless steel pipes, and comprising stainless steel pipes and convex pipe caps, wherein each stainless steel pipe is provided with two convex pipe caps, the inner part of each convex pipe cap is provided with an inner cavity, the convex pipe caps are plugged into the pipe ports to protect the stainless steel pipes, the deformation and bending of the pipe ports caused by the accumulation of pipes can be effectively prevented during the storage and transportation of the stainless steel pipes, an extrusion piece is screwed to push the extrusion piece by utilizing the conical surface of the extrusion piece, the extrusion piece further pushes a sealing ring outwards, the sealing ring is tightly attached to the pipe wall at the pipe ports to seal the pipe ports, the pipe walls can be effectively prevented from being corroded by external dust, rainwater and other pollutants, waterproof glue is extruded from the sealing ring by the extrusion piece, the waterproof glue not only increases the firmness of the connection between the convex pipe caps and the pipe walls to prevent the falling, but also can fill gaps between the sealing rings and the pipe walls, further improving the sealing action.

Description

Stainless steel pipe cap

Technical Field

The invention relates to the field of stainless steel pipes, in particular to a pipe cap of a stainless steel pipe.

Background

Stainless steel is short for stainless acid-resistant steel, and steel grade which is resistant to weak corrosive media such as air, steam and water or has stainless property is called stainless steel; and steel grades that are resistant to corrosion by chemically corrosive media (chemical attacks such as acids, bases, salts, etc.) are called acid-resistant steels. The term stainless steel is not intended to refer to just one type of stainless steel, but rather to more than a hundred industrial types of stainless steel, each of which has been developed to have good properties in its particular application. The key to success is first to figure out the application and then to determine the correct steel grade. There are usually only six steel grades related to the building construction application field, all of which contain 17-22% of chromium, and the preferred steel grade also contains nickel. The addition of molybdenum further improves atmospheric corrosion, particularly corrosion resistance to chloride-containing atmospheres.

The stainless steel product has panel class also has the pipe fitting class, and stainless steel pipe fitting belongs to one of the pipe fitting, and it is made by stainless steel material so called stainless steel pipe fitting, and it contains: stainless steel elbows, stainless steel tees, stainless steel cross joints, stainless steel reducing pipes, stainless steel pipe caps and the like can be divided into four types, namely socket type stainless steel pipe fittings, threaded stainless steel pipe fittings, flanged stainless steel pipe fittings and welded stainless steel pipe fittings according to the connection method. The stainless steel elbow is used for the turning place of the pipe fitting; the flange is used for connecting the pipe and the part for connecting the pipe with each other and is connected with the end of the pipe, and the stainless steel three-way pipe is used for collecting the three pipes; the stainless steel four-way pipe is used for collecting the four pipes; the stainless steel reducing pipe is used for connecting two pipes with different pipe diameters.

Nonrust steel pipe has a lot of advantages, but also has the shortcoming, if its both ends mouth of pipe is open, at the in-process of storing, transporting, pollutants such as rainwater, dust can enter into the inside corruption pipe wall of pipe, and sheathes the pipe cap on the mouth of pipe mostly to the protection mode of nonrust steel pipe, and current pipe cap structure is all fairly simple, can't prevent that the pressurized of mouth of pipe department from taking place the deformation, drops easily moreover, and is stable inadequately to the guard action of mouth of pipe.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a stainless steel pipe cap, which can effectively protect a stainless steel pipe from deformation and bending at a pipe orifice caused by accumulation of pipes in the process of storage and transportation by inserting a convex pipe cap into the pipe orifice, and can push an extrusion piece by screwing the extrusion piece through a conical surface of the extrusion piece, so that the extrusion piece further pushes a sealing ring outwards, the sealing ring is tightly attached to the pipe wall at the pipe orifice to seal the pipe orifice, so that external pollutants such as dust, rainwater and the like can be effectively prevented from corroding the pipe wall, meanwhile, the extrusion piece extrudes waterproof glue from the sealing ring, the waterproof glue not only increases the firmness of connection between the convex pipe cap and the pipe wall to prevent the convex pipe cap from falling off, but also can fill a gap between the sealing ring and the pipe wall, and further improves the sealing effect.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a nonrust steel pipe cap, includes nonrust steel pipe and convex pipe cap, every nonrust steel pipe is equipped with two convex pipe caps, the inner chamber has been seted up to the inside of convex pipe cap, rotate in the inner chamber and be connected with and push the piece, the mounting groove has been seted up to the lateral wall of convex pipe cap, the inside fixedly connected with of mounting groove rather than the sealing washer that matches, the middle part rigidity of sealing washer is inlayed and is had the laminating pad, the mounting groove is located the inboard space interpolation of sealing washer and is equipped with a plurality ofly and push the extruded article that the piece matches, and the extruded article runs through to the inner chamber in, the extruded article includes carriage release lever and extrusion hemisphere piece, the intercommunicating pore that matches with the carriage release lever is seted up to the inner wall of convex pipe cap, and carriage release lever and intercommunicating pore sliding connection, the extrusion hemisphere piece is located the mounting groove, and extrudes hemisphere piece and sealing washer and offsets. It protects nonrust steel pipe through filling in the mouth of pipe with the convex pipe cap, can effectively protect nonrust steel pipe and storing, can not lead to the fact mouth of pipe department to warp the bending because of tubular product piles up in the transportation, push the piece through revolving to twist and utilize its conical surface to push the extruded article, the extruded article and then outwards push the sealing washer, the sealing washer is hugged closely with the pipe wall of mouth of pipe department in order to seal the mouth of pipe, can effectively prevent external dust, pollutants such as rainwater corrode the pipe wall, the extruded article extrudes waterproof glue from the sealing washer simultaneously, waterproof glue has not only increased the fastness of convex pipe cap and pipe wall connection in order to prevent to drop, but also can fill the gap between sealing washer and the pipe wall, further improve sealed effect.

Further, hemispherical storage rubber chamber has been seted up to the inside of sealing washer, and the inside packing that stores up rubber chamber has the waterproof glue, the upper end intercommunication that stores up rubber chamber has a plurality of glue outlet pipes, when the sealing washer received pushing of extruded article, thereby the storage rubber chamber is extruded inside waterproof glue from glue outlet pipe, and waterproof glue has not only increased the fastness of convex pipe cap and pipe wall connection in order to prevent to drop, but also can fill the gap between sealing washer and the pipe wall, further improves sealed effect.

Further, the surface inlay of sealing washer has the netted guide layer with going out the rubber tube intercommunication, and a plurality of adhesive tape that draw of fixedly connected with on the netted guide layer, and the network structure on netted guide layer with draw the adhesive tape and play the guide effect to the waterproof glue of extruding to let waterproof glue can be even scribble on the pipe wall, thereby strengthen sealed effect.

Further, push the piece and include the threaded rod that rotates threaded connection with the inner wall of convex pipe cap, be located inside the inner chamber threaded rod one end fixedly connected with pushes away the driver block that offsets with the carriage release lever, thereby the driver block moves forward and outwards pushes away the carriage release lever when rotating the threaded rod, and then lets the carriage release lever drive extrusion hemisphere piece push away the sealing washer.

Furthermore, the driving block is in a conical structure, and the driving block moves and simultaneously pushes the moving rod outwards. And the outer surface of the driving block is a smooth surface, so that the friction force is reduced, and the moving rod is more smoothly pushed outwards.

Further, mounting groove and sealing washer are annular shape, the mounting groove is outer wide interior narrow structure.

Further, the sealing washer adopts soft elasticity material, the laminating is filled up and is adopted the silica gel material, and the leakproofness of silica gel is good, can let the laminating fill up fine and the pipe wall laminating.

Further, store up the upper end in gluey chamber and inlay and have packing intercommunication piece, and pack the surface that the intercommunication piece extended to the sealing washer, pack the intercommunication piece and be for adding waterproof glue to storing up gluey chamber in order to make things convenient for, with the help of the cylinder during the addition, let the syringe needle of cylinder pass and fill the intercommunication piece and enter into and store up gluey chamber.

Furthermore, the inner wall fixedly connected with of inner chamber runs through to the inside balanced slide bar of drive block, and the inner wall of drive block sets up the jack that matches with balanced slide bar, and balanced slide bar is in order to keep the drive block to remove in the horizontal direction, ensures the balanced stability of pushing the piece.

A use method of a stainless steel pipe cap comprises the following use methods:

s1, plugging the convex pipe cap into the pipe orifice of the stainless steel pipe, and butting the convex pipe cap by hand after plugging so as to butt the convex pipe cap and the pipe;

s2, rotating the threaded rod by hand to enable the driving block to be screwed into the convex pipe cap, enabling the driving block to move forwards while the conical surface of the driving block continuously pushes the moving rod towards two sides, further enabling the extruded hemispherical block to push the sealing ring, and enabling the sealing ring to protrude outwards to be tightly attached to the inner wall of the pipe orifice, so that the effect of sealing the pipe orifice is achieved;

s3, when the sealing ring is pushed, the glue storage cavity is compressed to extrude waterproof glue, and the waterproof glue is adhered to the inner wall of the pipe orifice after flowing out of the glue outlet pipe, so that the connection between the convex pipe cap and the pipe can be strengthened to prevent the convex pipe cap from falling off, and the sealing effect can be strengthened to prevent rainwater and dust from entering the pipe;

and S4, when the stainless steel pipe is used, the pushing piece is screwed outwards, and then the convex pipe cap is pulled out for use.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme is through filling in the mouth of pipe with the convex pipe cap and come the protection nonrust steel pipe, can effectively protect nonrust steel pipe and storing, can not lead to the fact mouth of pipe department to warp the bending because of tubular product piles up in the transportation, push the piece through revolving soon and utilize its conical surface to push the extruded article, the extruded article and then outwards push the sealing washer, the sealing washer is hugged closely with the pipe wall of mouth of pipe department in order to seal the mouth of pipe, can effectively prevent external dust, pollutants such as rainwater corrode the pipe wall, the extruded article extrudes waterproof glue from the sealing washer simultaneously, waterproof glue has not only increased the fastness of convex pipe cap and pipe wall connection in order to prevent to drop, but also can fill the gap between sealing washer and the pipe wall, further improve sealed effect.

(2) The hemispherical storage rubber cavity is seted up to the inside of sealing washer, and the inside packing that stores up the rubber cavity has the waterproof glue, and the upper end intercommunication that stores up the rubber cavity has a plurality of glue outlet pipes, and when the sealing washer received pushing of extruded article, thereby it is extruded with inside waterproof glue from glue outlet pipe to store up the rubber cavity, and the waterproof glue has not only increased the fastness of convex pipe cap and pipe wall connection in order to prevent to drop, but also can fill the gap between sealing washer and the pipe wall, further improves sealed effect.

(3) The surface inlay of sealing washer has the netted guide layer with going out the rubber tube intercommunication, and fixedly connected with is a plurality of to draw the adhesive tape on the netted guide layer, and the network structure on netted guide layer with draw the adhesive tape and play the guide effect to the waterproof glue of extruding to let waterproof glue can be even scribble on the pipe wall, thereby strengthen sealed effect.

(4) The pushing piece comprises a threaded rod connected with the inner wall of the convex pipe cap in a rotating mode, a driving block which is fixedly connected with one end of the threaded rod inside the inner cavity and is abutted to the moving rod is arranged, when the threaded rod is rotated, the driving block moves forwards to push the moving rod outwards, and then the moving rod drives the extruding hemispherical block to push the sealing ring.

(5) The driving block is in a conical structure, and the driving block moves and simultaneously pushes the moving rod outwards. And the outer surface of the driving block is a smooth surface, so that the friction force is reduced, and the moving rod is more smoothly pushed outwards.

(6) The sealing washer adopts soft elasticity material, and the laminating is filled up and is adopted the silica gel material, and the leakproofness of silica gel is good, can let the laminating fill up fine and the pipe wall laminating.

(7) Store up the upper end in gluey chamber and inlay and have packing intercommunication piece, and pack the surface that the intercommunication piece extends to the sealing washer, pack the intercommunication piece and be for adding waterproof glue in the chamber to storing up gluey conveniently, with the help of the cylinder during the interpolation, let the syringe needle of cylinder pass and fill the intercommunication piece and enter into and store up gluey chamber.

(8) The inner wall fixedly connected with of inner chamber runs through to the inside balanced slide bar of drive block, and the inner wall of drive block sets up the jack that matches with balanced slide bar, and balanced slide bar is in order to keep the drive block to remove in the horizontal direction, ensures the balanced stability of pushing the piece.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic representation of the male cap of the present invention in a pre-sealed condition;

FIG. 3 is a schematic structural view of the male cap of the present invention in a sealed state;

FIG. 4 is a schematic cross-sectional view of a male cap according to the present invention;

FIG. 5 is a schematic view of the structure at A in FIG. 4;

FIG. 6 is a schematic representation of an extrusion of the present invention in a pre-operative condition;

FIG. 7 is a schematic representation of an extrusion of the present invention after operation.

The reference numbers in the figures illustrate:

the device comprises a convex pipe cap 1, an inner cavity 101, a mounting groove 102, a pushing piece 2, a threaded rod 201, a driving block 202, a sealing ring 3, a laminating pad 301, a glue storage cavity 302, a reticular guide layer 303, a rubber outlet pipe 304, a rubber guiding strip 305, an extrusion piece 4, a moving rod 401, a semispherical block 402, a filling and communicating block 5 and a balance slide rod 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-7, a stainless steel pipe cap comprises stainless steel pipes and convex pipe caps 1, referring to fig. 1-2 and 4, each stainless steel pipe is provided with two convex pipe caps 1, an inner cavity 101 is formed inside each convex pipe cap 1, a balance slide rod 6 penetrating into a driving block 202 is fixedly connected to the inner wall of the inner cavity 101, a jack matched with the balance slide rod 6 is formed in the inner wall of the driving block 202, the balance slide rod 6 is used for keeping the driving block 202 moving in the horizontal direction and ensuring the balance stability of a pushing element 2, the pushing element 2 is rotatably connected in the inner cavity 101, the pushing element 2 comprises a threaded rod 201 rotatably and threadedly connected with the inner wall of the convex pipe cap 1, one end of the threaded rod 201 inside the inner cavity 101 is fixedly connected with the driving block 202 abutting against a moving rod 401, when the threaded rod 201 is rotated, the driving block 202 moves forward to push the moving rod 401 outward, and then the moving rod 401 drives the extrusion hemispherical block 402 to extrude the driving block 202 of the sealing ring 3 to be in a conical structure, and the driving block 202 moves and simultaneously pushes the moving rod 401 outwards. The outer surface of the driving block 202 is a smooth surface so as to reduce friction force and push the moving rod 401 outwards more smoothly, the outer side wall of the convex pipe cap 1 is provided with a mounting groove 102, the mounting groove 102 and the sealing ring 3 are both annular, and the mounting groove 102 is of a structure with a wide outer part and a narrow inner part;

referring to fig. 2-7, a sealing ring 3 matched with the mounting groove 102 is fixedly connected inside the mounting groove 102, the sealing ring 3 is made of soft elastic material, the bonding pad 301 is made of silica gel, the sealing performance of the silica gel is good, the bonding pad 301 can be well bonded to the pipe wall, the bonding pad 301 is fixedly embedded in the middle position of the sealing ring 3, a hemispherical glue storage cavity 302 is formed inside the sealing ring 3, a filling communicating block 5 is embedded at the upper end of the glue storage cavity 302, the filling communicating block 5 extends to the outer surface of the sealing ring 3, the filling communicating block 5 is used for adding waterproof glue into the glue storage cavity 302 conveniently, a needle of the needle cylinder penetrates through the filling communicating block 5 to enter the glue storage cavity 302 by means of the needle cylinder during adding, the waterproof glue is filled inside the glue storage cavity 302, the waterproof glue is made of material with low viscosity, so that the convex pipe cap 1 is convenient to pull down, the upper end of the glue storage cavity 302 is communicated with a plurality of glue outlet pipes 304, when the sealing ring 3 is pushed by the extrusion part 4, the glue storage cavity 302 is extruded to extrude the inner waterproof glue from the glue outlet pipe 304, the waterproof glue not only increases the firmness of the connection between the convex pipe cap 1 and the pipe wall to prevent the falling, but also can fill the gap between the sealing ring 3 and the pipe wall to further improve the sealing effect, the outer surface of the sealing ring 3 is embedded with a reticular guide layer 303 communicated with the glue outlet pipe 304, the mesh of the reticular guide layer 303 is larger, so that the dried waterproof glue can be conveniently torn off, the next extrusion of the inner waterproof glue can not be influenced, the reticular guide layer 303 is fixedly connected with a plurality of guide adhesive strips 305, the reticular structure of the reticular guide layer 303 and the guide adhesive strips 305 play a role in guiding the extruded waterproof glue so as to ensure that the waterproof glue can be uniformly coated on the pipe wall, thereby enhancing the sealing effect, a plurality of extrusion parts 4 matched with the extrusion part 2 are inserted into the space of the mounting groove 102 positioned at the inner side of the sealing ring 3, and extruded article 4 runs through to in the inner chamber 101, and extruded article 4 includes carriage release lever 401 and extrusion hemisphere piece 402, and the inner wall of convex pipe cap 1 is seted up the intercommunicating pore that matches with carriage release lever 401, and carriage release lever 401 and intercommunicating pore sliding connection, and extrusion hemisphere piece 402 is located mounting groove 102, and extrusion hemisphere piece 402 offsets with sealing washer 3.

The use method of the device comprises the following use methods:

s1, plugging the convex pipe cap 1 into the pipe orifice of the stainless steel pipe, and propping the convex pipe cap 1 by hand after plugging so as to prop the convex pipe cap 1 against the pipe;

s2, rotating the threaded rod 201 by hand to enable the driving block 202 to be screwed into the convex pipe cap 1, enabling the driving block 202 to move forwards while the conical surface of the driving block continuously pushes the moving rod 401 towards two sides, further enabling the extruded semispherical block 402 to push the sealing ring 3, enabling the sealing ring 3 to protrude outwards to be tightly attached to the inner wall of the pipe orifice, and accordingly sealing the pipe orifice;

s3, when the sealing ring 3 is pushed, the glue storage cavity 302 is compressed to extrude waterproof glue, and the waterproof glue flows out from the glue outlet pipe 304 and then is adhered to the inner wall of the pipe opening, so that the connection between the convex pipe cap 1 and the pipe can be enhanced to prevent the waterproof glue from falling off, and the sealing effect can be enhanced to prevent rainwater and dust from entering the pipe;

s4, when the stainless steel pipe is used, the pushing piece 2 is screwed outwards, and then the convex pipe cap 1 is pulled out for use.

It protects nonrust steel pipe through filling in the mouth of pipe with convex pipe cap 1, can effectively protect nonrust steel pipe and storing, can not lead to the fact mouth of pipe department to warp the bending because of tubular product piles up in the transportation, push away a 2 and utilize its conical surface to push away extruded article 4 through revolving soon, extruded article 4 and then outwards push away sealing washer 3, sealing washer 3 is hugged closely with the pipe wall of mouth of pipe department in order to seal the mouth of pipe, can effectively prevent external dust, pollutant such as rainwater corrodes the pipe wall, extruded article 4 extrudes waterproof glue from sealing washer 3 in with waterproof glue simultaneously, waterproof glue has not only increased convex pipe cap 1 and the fastness of pipe wall connection in order to prevent to drop, but also can fill the gap between sealing washer 3 and the pipe wall, further improve sealed effect.

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 equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.

Claims

1. A stainless steel pipe cap, includes stainless steel pipe and convex pipe cap (1), every stainless steel pipe is equipped with two convex pipe caps (1), its characterized in that: inner chamber (101) have been seted up to the inside of convex pipe cap (1), rotating connection has in inner chamber (101) pushes piece (2), mounting groove (102) have been seted up to the lateral wall of convex pipe cap (1), the inside fixedly connected with of mounting groove (102) and sealing washer (3) rather than matching, the middle part rigidity of sealing washer (3) is inlayed and is had laminating pad (301), mounting groove (102) are located the space interpolation of sealing washer (3) inboard and are equipped with a plurality of extruded article (4) rather than pushing piece (2) matching, and extruded article (4) run through to inner chamber (101), extruded article (4) include carriage release lever (401) and extrusion hemisphere piece (402), the intercommunicating pore that matches with carriage release lever (401) is seted up to the inner wall of convex pipe cap (1), and carriage release lever (401) and intercommunicating pore sliding connection, extrusion hemisphere piece (402) are located mounting groove (102), and the semi-spherical block (402) is extruded to be abutted against the sealing ring (3).

2. The stainless steel pipe cap of claim 1, wherein: hemispherical glue storage cavity (302) are seted up to the inside of sealing washer (3), and the inside packing that stores up gluey cavity (302) has waterproof glue, the upper end intercommunication in glue storage cavity (302) has a plurality of glue outlet pipes (304).

3. A stainless steel pipe cap according to claim 3, wherein: the outer surface of the sealing ring (3) is inlaid with a reticular guide layer (303) communicated with the rubber outlet pipe (304), and the reticular guide layer (303) is fixedly connected with a plurality of rubber guiding strips (305).

4. The stainless steel pipe cap of claim 1, wherein: the pushing piece (2) comprises a threaded rod (201) in threaded connection with the inner wall of the convex pipe cap (1) in a rotating mode, and a driving block (202) which is located inside the inner cavity (101) and is abutted to the moving rod (401) is fixedly connected to one end of the threaded rod (201).

5. The stainless steel pipe cap of claim 4, wherein: the driving block (202) is of a conical structure, and the outer surface of the driving block (202) is a smooth surface.

6. The stainless steel pipe cap of claim 1, wherein: the mounting groove (102) and the sealing ring (3) are both annular, and the mounting groove (102) is of a structure with a wide outer part and a narrow inner part.

7. The stainless steel pipe cap of claim 1, wherein: sealing washer (3) adopt soft elasticity material, laminating pad (301) adopt the silica gel material.

8. The stainless steel pipe cap of claim 2, wherein: the upper end of the glue storage cavity (302) is inlaid with a filling communicating block (5), and the filling communicating block (5) extends to the outer surface of the sealing ring (3).

9. The stainless steel pipe cap of claim 1, wherein: the inner wall of the inner cavity (101) is fixedly connected with a balance slide bar (6) penetrating into the driving block (202), and the inner wall of the driving block (202) is provided with a jack matched with the balance slide bar (6).

10. The use method of a stainless steel pipe cap according to any one of claims 1 to 9, wherein: the method comprises the following use methods:

s1, plugging the convex pipe cap (1) into the pipe orifice of the stainless steel pipe, and propping the convex pipe cap (1) by hand after plugging so as to prop the convex pipe cap (1) against the pipe;

s2, rotating the threaded rod (201) by hand to enable the driving block (202) to be screwed into the convex pipe cap (1), enabling the driving block (202) to continuously push the moving rod (401) towards two sides while moving forwards, further enabling the extruded semispherical block (402) to push the sealing ring (3), and enabling the sealing ring (3) to protrude outwards to be tightly attached to the inner wall of the pipe orifice, so that the function of sealing the pipe orifice is achieved;

s3, when the sealing ring (3) is pushed, the glue storage cavity (302) is compressed to extrude waterproof glue, and the waterproof glue flows out of the glue outlet pipe (304) and then is adhered to the inner wall of the pipe opening, so that the connection between the convex pipe cap (1) and the pipe can be enhanced to prevent the waterproof glue from falling off, and the sealing effect can be enhanced to prevent rainwater and dust from entering the pipe;

s4, when the stainless steel pipe is used, the pushing piece (2) is screwed outwards, and then the convex pipe cap (1) is pulled out for use.