CN113007472A

CN113007472A - Connecting structure of rigid-flexible interference fit socket self-sealing pipe

Info

Publication number: CN113007472A
Application number: CN202110366876.8A
Authority: CN
Inventors: 李齐军
Original assignee: Foshan Sanxin Municipal Engineering Co ltd
Current assignee: Foshan Sanxin Municipal Engineering Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-06-22

Abstract

The invention relates to the technical field of pipeline construction, and provides a connecting structure of a rigid-flexible interference fit socket self-sealing pipe, which comprises a flexible pipe fitting and a rigid connecting pipe, wherein bearing plugs are arranged at two ends of the connecting pipe, a bearing opening is arranged at the inner side of one end or two ends of the pipe fitting, the outer diameter of the socket head is in interference fit with the inner diameter of the bearing opening, and the pipe fitting and the connecting pipe are connected by inserting the socket head into the bearing opening. The self-sealing structure adopts interference fit self-sealing, and has no installation leakage risk; the spigot-and-socket joint is provided with the backstop teeth, so that the tensile capacity of the pipe fitting after being connected with the connecting pipe is improved; the middle part of the connecting pipe is provided with a baffle plate to ensure that the socket plug and the socket are matched in place, and the baffle plate is directly propped against the end part of the pipe fitting, so that the pipe-jacking construction is convenient; the problem that a rigid material joint is easy to crack when jacking and correcting deviation is solved, and the problem that the bearing port of a flexible pipe is relatively poor in stress is solved; the problem of corrosion prevention of the inner wall of the connecting pipe is solved.

Description

Connecting structure of rigid-flexible interference fit socket self-sealing pipe

Technical Field

The invention relates to the technical field of pipeline construction, in particular to a connecting structure of a socket self-sealing pipe in rigid-flexible interference fit.

Background

With the further development of urbanization and the gradual improvement of rural living conditions, the water supply and drainage requirements of public infrastructure and families are further improved, and the construction work such as pipeline installation, maintenance and the like cannot be avoided.

The reinforced concrete pipe joint of the socket joint is not tensile, the water-stopping performance is not high, the pipe is heavy in weight and poor in corrosion resistance, so that the HDPE solid-wall pipe has a wide market application prospect. In the installation and maintenance construction of pipelines, for example, in the trenchless construction of drainage pipelines, one side of the pipeline does not have enough construction space under many conditions, so that inclined holes can be constructed only on one side, then a well is made on the other side, and then the pipelines are installed and connected in the well, pipe joints are jacked and pulled, and the laying is completed.

The length of the pipe joint of the prior HDPE solid-wall pipe (DN 300-800 mm) is 6 meters, 9 meters, 12 meters and the like, and the prior butt joint mode of the pipe joint only comprises hot melt butt joint, clamp connection, electric hot melt, thermal contraction belt connection and the like during installation or maintenance construction. The pipeline joint modes have the following defects in municipal pipeline trenchless construction: 1) the hot-melt butt joint needs a certain field space, can be constructed only after the butt joint is completed, is not suitable for pipe-jacking construction in a well, can form an inward flange in the hot-melt butt joint, and needs to be cut off; 2) the electric hot melting connection has danger in water occasions, is inconvenient to construct, and is easy to collapse during welding to generate leakage points; 3) the thermal contraction belt is connected, the strength is slightly low, and the large-caliber pipeline is not uniformly heated and is inconvenient; 4) the clamp connection is not suitable for trenchless construction, the integrity of the pipeline connection is not strong, the sealing performance is poor, the pipeline joint is easy to be disjointed, and the capacity of bearing tension and vibration is limited.

In addition, the following flexible socket joints for pipelines are also available in the market:

1. the HDPE solid wall short pipe joint of the socket joint is cut into a bell mouth at one end, and the spigot is cut into the other end, and water is sealed and stopped through the sealing ring.

2. Saw-tooth double containment auto-lock socket joint interface HDPE extrusion solid-walled pipe, because this pipe is extrusion production, cooling shaping's extrusion pipe is oval most of and the pipe wall has great residual stress, plastics extrusion pipe can lead to the interface wall thickness that processing came out to differ and have great tolerance because of the oval problem of tubular product when processing flexible interface, can be great because of the inhomogeneous installation degree of difficulty of interface wall thickness in the work progress, the pipeline of good installation is because of the leakproofness takes place the infiltration inadequately easily, and lead to the atress inequality to take place to tear because of the inhomogeneous problem of interface leads to tubular product in the installation easily, tear the in-process again because of extrusion tubular product have great internal stress and lead to the continuation tear, can not be used for the push pipe construction.

3. The sawtooth double-seal composite winding solid-wall pipe is improved in machining process, materials are adjustable, the produced pipe is relatively round, the machining and construction requirements of a flexible interface are basically met, but the pipe is made of plastics, physical properties of the pipe are good and bad of the plastic materials, a joint has a weak link after machining, all construction environments cannot be met in the aspects of shearing resistance and sealing performance, and therefore the product is an excellent product in the current market and is used in the construction environment meeting the requirement of performance selection of the plastics.

In the non-excavation laying and repairing construction of municipal drainage pipelines, although the various pipes have the simple-interface HDPE solid-wall pipe joints which can be installed in a small space, the pipe joints have the advantages of convenience in connection, good sealing performance, tensile resistance, convenience in pipe descending in an inspection well or a working well, capability of jacking the interior of the original pipeline to realize replacement and the like, the pipelines with the above interface modes cannot meet the requirements of constructing various soil qualities and various construction operation methods in complex environments.

Disclosure of Invention

Aiming at the problems, the invention provides a connection structure of a socket self-sealing pipe with rigid and flexible interference fit, which not only can keep the advantages of the existing products in the market, but also can surpass the performance of the existing products in the market, is suitable for more construction environments, adopts interference fit to realize self sealing, and has no installation leakage risk; the spigot-and-socket joint is provided with the backstop teeth, so that the tensile capacity of the pipe fitting after being connected with the connecting pipe is improved; the middle part of the connecting pipe is provided with a baffle plate to ensure that the socket plug and the socket are matched in place, and the baffle plate is directly propped against the end part of the pipe fitting, so that the pipe-jacking construction is convenient; the problem that a rigid material joint is easy to crack when jacking and correcting deviation is solved, and the problem that the bearing port of a flexible pipe is relatively poor in stress is solved; the problem of corrosion prevention of the inner wall of the connecting pipe is solved; the pipe fitting has light self weight, and the pipeline is anti-settling and anti-shearing; the application range is wide, and the service life is long after the pipe fitting is connected with the connecting pipe.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a connection structure of rigid-flexible interference fit's socket joint self-sealing pipe, is including flexible pipe fitting, still including rigid takeover, takeover both ends are equipped with the spigot, the inboard at pipe fitting one end or both ends is equipped with the bellmouth, the spigot external diameter with interference fit between the bellmouth internal diameter, the pipe fitting with the takeover passes through the spigot inserts the bellmouth is realized connecting.

Preferably, the middle part of the connecting pipe is provided with a raised annular baffle, after the pipe fitting is in butt joint with the connecting pipe, the end part of the pipe fitting is propped against the side surface of the baffle, so that the pipe jacking construction is suitable for the pipe jacking construction, and meanwhile, the additionally arranged baffle can ensure that the bearing plug and the bearing port are matched in place.

Preferably, the height of the baffle is not higher than the outer diameter of the pipe fitting, so that the sealing effect of the hole inlet during pipe jacking is not influenced, and the appearance of the butted pipe fitting is not influenced.

Preferably, the socket plug is provided with a stopping tooth, so that the tensile and shear resistance of the pipe fitting connected with the connecting pipe is improved.

Preferably, a step opening is formed in the port of the bearing opening, so that the bearing plug can be conveniently butted with the bearing opening, and the inner diameter of the step opening is larger than the outer diameter of the bearing plug.

Preferably, the connecting pipe is a nodular cast iron pipe or a resin steel mesh composite pipe, and the connecting pipe is high in rigidity and not easy to deform.

Preferably, the inner wall of the connecting pipe is subjected to antiseptic treatment, so that the service life of the connecting pipe is prolonged.

Preferably, the pipe fitting is a plastic pipe which has certain flexibility and certain plasticity, and when the plastic pipe fitting is connected with the connecting pipe, the socket has certain deformation, and the plastic deformation of the plastic pipe fitting is used for achieving sealing between the plastic pipe fitting and the connecting pipe.

Preferably, the inner diameter of the connecting pipe is equal to that of the pipe fitting, so that after the connecting pipe is connected, the inner diameter of the pipe fitting is unchanged, and the pipe resistance is not additionally increased.

Preferably, the length of the socket is slightly greater than that of the socket head, so that the end part of the pipe fitting can be inserted to the side surface of the baffle, and pipe jacking construction is facilitated.

The invention has the beneficial effects that:

1. the self-sealing structure adopts interference fit self-sealing, and has no installation leakage risk;

2. the spigot-and-socket joint is provided with the backstop teeth, so that the tensile and shear resistance of the pipe fitting connected with the connecting pipe is improved;

3. the middle part of the connecting pipe is provided with a baffle plate to ensure that the socket plug and the socket are matched in place, and the baffle plate is directly propped against the end part of the pipe fitting, so that the pipe-jacking construction is convenient;

4. the problem that a rigid material joint is easy to crack when jacking and correcting deviation is solved, and the problem that the bearing port of a flexible pipe is relatively poor in stress is solved;

5. the problem of corrosion prevention of the inner wall of the connecting pipe is solved;

5. the integrity of the pipeline is good, and the joint is resistant to settlement and shearing;

6. the application range is wide, and the service life is long after the pipe fitting is connected with the connecting pipe.

Drawings

FIG. 1 is a schematic structural view of example 1;

FIG. 2 is an enlarged view at A of FIG. 1;

FIG. 3 is a schematic structural view of a joint pipe of embodiment 1;

FIG. 4 is a schematic structural view of embodiment 2.

Detailed Description

The technical solution of the present invention is described below with reference to the accompanying drawings and examples.

Example 1: referring to fig. 1 to 3, the present embodiment provides a connection structure of a rigid-flexible interference-fit socket self-sealing pipe, including a plurality of flexible pipe fittings 1 and a plurality of rigid connection pipes 2, where two ends of each connection pipe 2 are provided with a socket 3, two ends of each pipe fitting 1 are provided with sockets 4, an outer diameter of each socket 3 is in interference fit with an inner diameter of each socket 4, and the pipe fittings 1 and the connection pipes 2 are connected by inserting the socket 3 into the sockets 4, where the mentioned flexibility and rigidity are relative, that is, the pipe fittings 1 are more easily deformed relative to the connection pipes 2, and when the pipe fittings 1 and the connection pipes 2 are butted, a deformation amount of the pipe fittings 1 is preferably more than 10 times that of the connection pipes 2, and a sealing effect is achieved by plastic deformation of the pipe fittings 1 themselves.

Specifically, the middle of the connecting pipe 2 is provided with a raised annular baffle 5, two side faces of the baffle 5 are perpendicular to the axis of the connecting pipe 2, after the pipe fitting 1 is in butt joint with the connecting pipe 2, the end part of the pipe fitting 1 abuts against the side faces of the baffle 5, so that pipe jacking construction is suitable for being adopted, meanwhile, the length of the socket 4 is slightly larger than that of the socket 3, so that the end part of the pipe fitting 1 can be inserted into the side faces of the baffle 5, and the additionally arranged baffle 5 can also ensure that the socket 3 and the socket 4 are matched in place. The height of the baffle 5 is not higher than the outer diameter of the pipe fitting 1, and preferably the outer diameter of the baffle 5 is equal to the outer diameter of the pipe fitting 1, so that the appearance of the pipe fitting 1 connected with the connecting pipe 2 is not affected.

Specifically, the socket 3 is equipped with a plurality of stopping teeth 6 at intervals, behind pipe fitting 1 and takeover 2, stopping teeth 6 can improve the tensile ability of shearing after pipe fitting 1 is connected with takeover 2, avoids pipe fitting 1 and takeover 2 to drop.

Specifically, socket 4 port department is equipped with step mouth 7 and is convenient for the butt joint socket 3, the internal diameter of step mouth 7 is greater than socket 3's external diameter.

Specifically, the connecting pipe 2 is a nodular cast iron pipe which is strong in rigidity and not easy to deform, and a resin steel mesh composite pipe which is strong in rigidity and not easy to deform can also be adopted.

Specifically, the inner wall of the connecting pipe 2 is subjected to antiseptic treatment, so that the service life of the connecting pipe 2 is prolonged.

Preferably, the pipe fitting 1 is a plastic pipe, preferably a high-strength plastic material, such as HDPE solid-wall pipe, which has certain flexibility, and when the pipe fitting 2 is connected, the socket 4 has certain deformation, and the plastic deformation is used for achieving sealing with the pipe fitting 2 without adding other sealing fittings.

Specifically, the inner diameter of the connecting pipe 2 is equal to that of the pipe fitting 1, so that after the connecting pipe is connected, the inner diameter of the pipe fitting 1 is unchanged, and extra pipe resistance is not increased.

In the embodiment, the connecting pipe 2 is adopted to connect the pipe fittings 1 one by one, so that additional sealing elements are not needed, and the pipe-jacking device is suitable for pipe-jacking construction.

Example 2: referring again to fig. 4, the difference from embodiment 1 is that: in the embodiment, the fine stone-concrete pipe 8 is butted with the flexible pipe fitting 1, the two ends of the fine stone-concrete pipe 8 are fixedly provided with the connecting pipes 2, the pipe fitting 1 is connected with the connecting pipes 2 in the same way as the embodiment, and the inner wall of the fine stone-concrete pipe 8 can be sprayed with resin for corrosion prevention.

Example 3: the difference from example 2 is that: the procedure of example 2 was repeated except that the fine stone/clay pipe 8 was replaced with a resin material pipe.

From example 2 and example 3, it can be seen that the present invention can be extended to other material pipes fixedly connected to the adapter 2, and the end of the adapter 2 can be connected to the plastic pipe 1.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

While one embodiment of the present invention has been described in detail, the focus is on an interference fit female connection structure of a flexible socket of a rigid male plug, but the description is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. The utility model provides a connection structure of rigid-flexible interference fit's socket joint self-sealing pipe, including flexible pipe fitting, its characterized in that: the pipe fitting is characterized by further comprising a rigid connecting pipe, bearing plugs are arranged at two ends of the connecting pipe, a bearing opening is formed in one end or the inner sides of two ends of the pipe fitting, the outer diameter of the bearing plug is in interference fit with the inner diameter of the bearing opening, and the pipe fitting is connected with the connecting pipe through the insertion of the bearing plug into the bearing opening.

2. The connection structure of a rigid-flexible interference fit socket self-sealing pipe as claimed in claim 1, wherein: the middle part of the connecting pipe is provided with a raised annular baffle, and when the pipe fitting is butted with the connecting pipe, the end part of the pipe fitting is propped against the side surface of the baffle.

3. The connection structure of a rigid-flexible interference fit socket self-sealing pipe as claimed in claim 2, wherein: the height of the baffle is not higher than the outer diameter of the pipe fitting.

4. The connection structure of a rigid-flexible interference fit socket self-sealing pipe as claimed in claim 1, wherein: the plug bearing head is provided with retaining teeth.

5. The connection structure of a rigid-flexible interference fit socket self-sealing pipe as claimed in claim 1, wherein: the socket port department is equipped with the step mouth and is convenient for the butt joint the socket head, the internal diameter of step mouth is greater than the external diameter of socket head.

6. The connection structure of a rigid-flexible interference fit socket self-sealing pipe as claimed in claim 1, wherein: the connecting pipe is a nodular cast iron pipe or a resin steel mesh composite pipe.

7. The connection structure of a female self-sealing pipe with a rigid-flexible interference fit according to claim 1, 2 or 6, wherein: and carrying out anticorrosive treatment on the inner wall of the connecting pipe.

8. The connection structure of a rigid-flexible interference fit socket self-sealing pipe as claimed in claim 1, wherein: the pipe fitting is a plastic pipe.

9. The connection structure of a rigid-flexible interference fit socket self-sealing pipe as claimed in claim 1, wherein: the inner diameter of the connecting pipe is equal to that of the pipe fitting.

10. The connection structure of a rigid-flexible interference fit socket self-sealing pipe as claimed in claim 2, wherein: the length of the bearing opening is slightly larger than that of the bearing plug.