CN214093476U

CN214093476U - Stainless steel composite flexible mouthpiece with full-covered mouth lining

Info

Publication number: CN214093476U
Application number: CN202022477627.XU
Authority: CN
Inventors: 程思哲
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-08-31
Anticipated expiration: 2030-10-29

Abstract

The utility model provides a compound flexible interface tube of stainless steel full Bakou lining is through the anti-cover of interior bushing pipe turn-ups that exposes, makes the pipe wall terminal surface of parent tube and the excircle of parent tube port all have a stainless steel layer to make the medium of the pipe-line transportation of this union coupling can not contact with the parent tube material, solved traditional socket joint formula flexible interface tube and still exist because of the contact of parent tube and medium, the problem that the medium is contaminated.

Description

Stainless steel composite flexible mouthpiece with full-covered mouth lining

Technical Field

The patent of the utility model relates to a high-quality water delivery cast is particularly suitable for the pipeline use of carrying the drinking water.

Background

People's drinking water and industrial water mainly rely on pipeline transport, along with the development of society and people's attention to health, the quality of the water of requirement is higher and higher. In contrast, the application of stainless steel pipeline pipes is being vigorously popularized by the country, at present, thin-wall stainless steel pipes are gradually used for replacing plastic pipes and galvanized steel pipes in small-caliber pipelines, but the cost of stainless steel pipes used for middle-caliber and large-caliber pipelines is high, and the pipelines are difficult to be generally used. At present, although the application cost of a pipeline can be reduced by applying a stainless steel lining pipe, the connection of the pipe becomes the bottleneck of the application, for example, the cost can be increased by adopting a flange connection method, the corrosion resistance of a welding interface can be reduced by adopting a welding connection method, and a pollution source of water quality is formed by the exposed base pipe sleeve on the end face of the wall of a plug pipe and the excircle of a port of a flexible interface connection method, so that the development of the stainless steel composite pipe which has no pollution source for water delivery and low application cost is required for ensuring the safety of drinking water of people.

Disclosure of Invention

The utility model aims at providing a compound flexible interface pipe of stainless steel full-envelope lining of high quality, solve present traditional stainless steel lining pipe and adopt flange joint's method can increase the expense, there is the easy rust of welding seam to reduce the pipeline life in the method that adopts welded connection, there is the problem such as the pollution sources that plug pipe terminal surface and the exposed parent tube of pipe port excircle become quality of water in the method that adopts flexible interface connection, the intensity and the sanitary performance of the use of this pipe reach the level of full stainless steel, but the application cost can reduce more than seventy percent.

The stainless steel full-envelope lining composite flexible mouthpiece consists of a base tube 1 made of carbon steel, an inner lining tube 2 made of thin-wall stainless steel, a socket 3 and a plug 4 which are respectively positioned at two ends of the tube, a sealing rubber ring 5 arranged in a groove of the plug, an envelope 7 formed by a stainless steel layer covering the end surface of the base tube and a stainless steel outer lining tube section 6 sleeved on the excircle of the port of the base tube, and a protective layer 8 positioned on the excircle of the plug and having insulating property.

After the patent pipe is connected, the outer stainless steel surface of the outer lining pipe section 6 at the port of the plug 4 and the inner surface of the inner stainless steel lining pipe 2 of the socket 3 are sealed by the sealing rubber ring 5, so that carbon steel of the base pipe cannot be contacted with a medium conveyed by the pipe, and the protection effect of the full stainless steel pipe on the conveyed medium is achieved. When the pipe is used, when a pipeline bears acting force to generate radial deviation displacement or axial deflection swing angle displacement, the plug of the interface contacts with stainless steel of the lining pipe 2 of the socket head 3 through the ladle mouth 7 coated with the stainless steel and/or contacts with stainless steel of the lining pipe 2 of the socket head 3 through the protective layer 8 sleeved on the excircle of the plug 4, the radial offset of the interface and the swing angle amount of the axial deflection of the pipe are limited, the hidden danger of interface leakage caused by overlarge displacement amount of the interface is eliminated, and the potential difference corrosion performance caused by the contact of carbon steel materials and stainless steel materials on the excircle of the base pipe is avoided.

Drawings

FIG. 1 is a schematic view of a stainless steel composite flexible mouthpiece with a full-enveloping liner

1. A base pipe; 2. a liner tube; 3. a bearing head; 4. a plug; 5. sealing the rubber ring; 6. an outer liner section; 7. wrapping the mouth; 8. protective layer

FIG. 2 is a schematic view of a stainless steel full-clad liner composite self-anchored flexible mouthpiece

9. A circular ring; 10. a concave cavity; 11. outer circle of plug

Detailed Description

The utility model discloses a composite method: 1. inserting a thin-wall lining pipe 2 made of stainless steel into a base pipe 1 made of carbon steel, wherein the lining pipe is longer than the base pipe, and two ends of the base pipe are provided with extending pipe sections of the lining pipe; 2. applying an acting force to the extended pipe section to turn up the edge to enable the end surface of the pipe wall of the base pipe to be covered by stainless steel, and then applying an acting force to the turned edge to enable the turned edge to become an outer lining pipe section 6 which is reversely sleeved on the excircle of the port of the base pipe; 3. the method comprises the following steps of adopting an expansion forming process of expanding an inner die and sizing an outer die to enable two ends of a pipe to generate radial expansion plastic deformation, forming a socket and a plug according to the shape of the die, wherein in the process, an outer lining pipe section reversely sleeved on the excircle of the port of a base pipe generates radial expansion plastic deformation under the action of the radial expansion deformation force of the base pipe, and becomes an outer lining pipe section which is more tightly embraced with the excircle of the port of the base pipe under the reaction force of the outer die arranged on the excircle sizing of the pipe, so that the socket and the plug finish the stainless steel clad opening of the port; 4. through the closing plates at the two ends of the pipe, the stainless steel surfaces of the socket and the plug socket are sealed, then high-pressure water is input, the liner pipe generates radial expansion plastic deformation and is tightly attached to the inner circle of the base pipe, after the base pipe is forced to generate elastic deformation, the water pressure applied to the liner pipe is removed, the radial contraction rebound stress of the base pipe tightly embraces the liner pipe together, the compounding of the liner pipe is completed, and the stainless steel full-socket liner composite flexible mouthpiece is formed.

The water supply and delivery pipeline is wide in distribution range, cannot be installed in a section with complex geological conditions (such as faults, landslides, easy settlement and the like) in a crossing mode, and ground displacement and terrain change are main reasons for causing pipeline joint pulling-out leakage. For this reason, the utility model discloses an interface has the cast of preventing drawing function, and its interface bell head is equipped with a cavity 10, and the back is mutually injected to the socket joint, and the internal diameter that has open-ended ring 9 of locating in this cavity is less than the excircle 11 diameter of plug, becomes the atress ring that prevents the socket head and draw each other and take off, and the material of ring should be copper product or other and stainless steel can not produce potential difference corrosion or have insulating properties's material, makes this pipe become the stainless steel full envelope lining composite flexible interface pipe that has the anti-drawing function (see fig. 2).

The two ends of the stainless steel full-envelope lining composite flexible interface tube are respectively provided with a socket and a plug, the inner circle of the tube and the outer circle of the port of the tube are lined with thin-wall stainless steel tubes, the end surface of the tube wall is covered with a stainless steel layer, and a pipeline connected with the tube can prevent carbon steel of a base tube from contacting with a pipeline conveying medium through the sealing of a rubber ring; the stainless steel layer on the end surface of the pipe wall and the stainless steel outer lining pipe section sleeved on the excircle of the pipe port are formed by flanging and reversely sleeving the extending section of the inner lining pipe inserted into the inner circle of the base pipe; the compounding of the stainless steel outer lining pipe section sleeved on the excircle of the port of the base pipe is realized by that the expanding deformation force of the base pipe forces the base pipe to generate radial expanding plastic deformation in the expanding plastic forming process of the base pipe and the socket, and the stainless steel outer lining pipe section is tightly encircled with the excircle of the port of the base pipe of the formed base pipe and the socket under the pressing force of the interaction of an inner die and an outer die to form compounding; the compounding of the lining stainless steel pipe and the base pipe is that after the socket and the plug are formed, the surfaces of the stainless steel pipe at the two pipe ends are sealed, the lining pipe generates plastic deformation with radial expansion under the action of applying high pressure water, the base pipe is forced to generate elastic deformation, the water pressure applied to the lining pipe is removed, the lining pipe is tightly embraced together by using the rebound stress generated by the base pipe, and the compounding is completed; when the pipeline is stressed to generate radial deviation displacement or axial deflection swing angle, the interface contacts with the stainless steel lining of the inner circle of the socket head through the stainless steel bag opening of the plug port and/or the protective layer of the plug, so that excessive displacement of the interface is prevented, and potential difference corrosion caused by contact of carbon steel of the base pipe and the stainless steel is avoided; the inner diameter of the ring arranged in the concave cavity of the bearing head is smaller than the outer diameter of the plug.

Claims

1. The utility model provides a compound flexible mouth-piece of stainless steel full-envelope lining which characterized in that: the two ends of the pipe are respectively provided with a bearing head and a plug, the inner circle of the pipe and the outer circle of the port of the pipe are lined with thin-wall stainless steel pipes, the end surface of the pipe wall covers a stainless steel layer, and the carbon steel of the base pipe can be prevented from contacting with a pipeline conveying medium by the sealing of a rubber ring in the pipeline connected with the pipe.

2. The stainless steel full clad liner composite flexible mouthpiece of claim 1, wherein: the stainless steel layer on the end face of the pipe wall and the stainless steel outer lining pipe section sleeved on the excircle of the pipe port are formed by flanging and reversely sleeving the extending section of the inner lining pipe inserted into the inner circle of the base pipe.

3. The stainless steel full clad liner composite flexible mouthpiece of claim 1, wherein: the compounding of the stainless steel outer lining pipe section sleeved on the excircle of the port of the base pipe is realized by that the expanding deformation force of the base pipe forces the base pipe to generate radial expanding plastic deformation in the expanding plastic forming process of the base pipe and the socket, and the stainless steel outer lining pipe section is tightly encircled with the excircle of the port of the base pipe of the formed base pipe and the socket under the pressing force of the interaction of the inner die and the outer die to form the compounding.

4. The stainless steel full clad liner composite flexible mouthpiece of claim 1, wherein: the compounding of the lining stainless steel pipe and the base pipe is that after the socket and the plug are formed, the surfaces of the stainless steel at the two pipe ends are sealed, the lining pipe generates plastic deformation with radial expansion under the action of applying high pressure water, the base pipe is forced to generate elastic deformation, the water pressure applied to the lining pipe is removed, the lining pipe is tightly embraced together by the rebound stress generated by the base pipe, and the compounding is completed.

5. The stainless steel full clad liner composite flexible mouthpiece of claim 1, wherein: when the pipeline is stressed to generate radial deviation displacement or axial deflection swing angle, the interface contacts with the stainless steel lining of the inner circle of the socket head through the stainless steel bag opening of the plug port and/or the protective layer of the plug, excessive displacement of the interface is prevented, and potential difference corrosion generated by contact of carbon steel of the base pipe and the stainless steel is avoided.

6. The stainless steel full clad liner composite flexible mouthpiece of claim 1, wherein: the inner diameter of the ring arranged in the concave cavity of the bearing head is smaller than the outer diameter of the plug.

7. The utility model provides a compound flexible mouth-piece of stainless steel full-envelope lining which characterized in that: the flexible interface tube comprises the flexible interface tube of any one of claims 1-6 and a composite flexible interface tube made of various materials.