CN114576450A - Composite pipe interface structure and composite pipe adaptable to geological settlement - Google Patents

Abstract

The invention discloses a composite pipe interface structure and a composite pipe suitable for geological settlement, wherein the composite pipe interface structure comprises a socket pipe body and a socket pipe body, the socket pipe body comprises a socket inner pipe and a socket outer pipe coated outside the socket inner pipe, the right end of the socket inner pipe is provided with a socket section protruding out of the right end surface of the socket outer pipe, the inner side wall of the socket section is provided with a first centering concave surface, the first centering concave surface is a spherical concave surface or an ellipsoidal concave surface, and the ratio of the minor diameter to the major diameter of an ellipsoid determined by the ellipsoidal concave surface is 0.8-1; the socket body comprises a socket inner pipe and a socket outer pipe coated outside the socket inner pipe, a slot into which a socket section can be inserted is formed between the left end part of the socket inner pipe and the left end part of the socket outer pipe, a first arc-shaped convex surface which is attached to a first centering concave surface is arranged on the outer side wall of the socket inner pipe, and a sealing structure is further arranged between the socket inner pipe and the socket inner pipe. The invention can adapt to geological settlement, and has high connection strength and good sealing property.

Description

Composite pipe interface structure and composite pipe that can adapt to geological subsidence

technical field

The invention relates to the technical field of pipelines, in particular to a composite pipe interface structure and a composite pipe that can adapt to geological subsidence.

Background technique

In order to ensure the strength of the pipeline and improve the sealing performance at the same time, the composite pipe came into being. Cement-plastic composite pipe is the most common type of composite pipe, which is widely used in various projects such as water supply and drainage to provide convenience for people's lives.

Common cement-plastic composite pipes generally have the following structures, including an outer pipe of reinforced cement structure and a plastic inner pipe arranged in the outer pipe. After the existing cement-plastic composite pipes are inserted together, a fixed interface will be formed. When earthquakes, groundwater depletion, new large-scale buildings, etc. occur, it will lead to different degrees of geological subsidence. The interface will be bent accordingly. Because the above-mentioned pipeline interface structure is very tightly connected, the stress at the pipeline interface cannot be released anywhere, which seriously leads to the occurrence of interface bursting or disconnection.

In order to solve the above problems, the invention patent with the application number of 201810293022.X discloses a flexible sealing self-locking socket interface, which includes a socket and a socket, the inner wall of the socket is provided with a first-type annular protrusion, and the socket is The outer wall is provided with a second-type annular protrusion, wherein when the socket is assembled to the socket, the first-type annular protrusion and the second-type annular protrusion form self-locking, and the first-type annular protrusion and the second-type annular protrusion form a self-locking. There are gaps between the annular protrusions so that the socket body can deflect relative to the socket body.

Such a pipe interface structure also has the following problems. Since there is a gap between the front side of the first type of annular protrusion and the corresponding rear side of the second type of annular protrusion, the rear side of the first type of annular protrusion There is also a gap between the corresponding front side of the second type of annular protrusion, resulting in a loose connection between the socket and the interface, low connection strength, and poor sealing performance at the connection between the socket and the interface.

SUMMARY OF THE INVENTION

In view of this, one of the objectives of the present invention is to provide a composite pipe joint structure that can adapt to geological subsidence, has excellent sealing performance and high connection strength.

Another object of the present invention is to provide a composite pipe that can be socket-inserted to form the above-mentioned composite pipe joint structure.

The technical scheme that the present invention adopts for solving its technical problem is:

A composite pipe interface structure adaptable to geological subsidence comprises a socket pipe body and a socket pipe body, the socket pipe body comprises a socket inner pipe and a socket outer pipe coated on the outside of the socket inner pipe, the socket pipe body is The right end of the socket inner tube is provided with a socket section protruding from the right end face of the socket outer tube, the inner side wall of the socket section is provided with a first centering concave surface, and the first centering concave surface is a spherical concave surface or an ellipsoidal concave surface, the ratio of the small diameter to the large diameter of the ellipsoid determined by the ellipsoidal concave surface is 0.8 to 1; A slot into which the socket section can be inserted is formed between the left end of the inner tube of the socket and the left end of the outer tube of the socket. The first arc-shaped convex surface that is fitted with the centering concave surface is also provided with a sealing structure between the socket inner tube and the socket inner tube.

Preferably, the inner side wall of the socket section is provided with a first locking convex portion located on the right side of the first centering concave surface, and a second locking convex portion is provided on the right side of the first arc-shaped convex surface There is a gap between the second locking convex part and the first locking convex part, and the two can abut to limit the separation of the inner pipe of the socket and the inner pipe of the socket.

Preferably, the inner side wall of the socket section is provided with a second centering concave surface, the first centering concave surface is a spherical concave surface, and the second centering concave surface is the same as the first centering concave surface. The spherical concave surface of the center of the ball is provided with a second arc-shaped convex surface that fits with the second centering concave surface on the outer side wall of the inner tube of the socket.

Preferably, the right side of the second centering concave surface is provided with a third locking convex portion, and the right side of the second arc-shaped convex surface is provided with a third locking convex portion that can abut to restrict The fourth locking convex part where the inner tube of the socket and the inner tube of the socket are separated.

Preferably, the sealing structure includes a groove arranged on the first centering concave surface and a first sealing ring fixedly arranged in the groove, and the inner surface of the first sealing ring protrudes from the outer surface of the first sealing ring. The first centering concave surface is in an interference fit with the first arc-shaped convex surface.

Preferably, the sealing structure comprises a groove arranged on the first arc-shaped convex surface and a second sealing ring fixedly arranged on the groove, and the outer surface of the second sealing ring protrudes from the outer surface of the second sealing ring. The first arc-shaped convex surface is in an interference fit with the first centering concave surface.

Preferably, the sealing structure includes a third sealing ring located between the socket section and the socket tube body, and the inner side wall of the socket outer tube is provided with a tapered section that gradually narrows from left to right, so When the socket section is inserted into the slot, the conical section is pressed to compress the third sealing ring.

Preferably, the third sealing ring is fixedly arranged on the inner side wall of the socket section and protrudes from the inner surface of the socket section.

Preferably, a convex portion is provided on the inner side wall of the socket section, and the third sealing ring is fixed on the convex portion.

Preferably, the socket outer pipe and the socket outer pipe are both cement pipes, and the outer side walls of the socket inner pipe and the socket inner pipe are both provided with a relief structure that can improve the adhesion to cement.

A composite pipe, one end of the composite pipe is provided with the above-mentioned socket pipe body, and the other end is provided with the above-mentioned socket pipe body.

The beneficial effects of the invention are: when geological subsidence occurs, the pipeline joints will be bent under pressure, and adjacent pipeline joints will be bent in different directions. Between adjacent pipes, the inner pipe of the socket and the inner pipe of the socket can be rotated relative to a certain angle around the spherical center or ellipsoid center determined by the first centering concave surface, so that the pipe joint can bear large bending deformation; in addition, Since the first centering concave surface and the first arc-shaped convex surface are spherical surfaces that fit each other, after the inner tube of the socket and the inner tube of the socket are rotated by a certain angle relative to each other, the two remain close to each other, which can effectively improve the sealing performance and improve the bearing capacity. The connection strength of the mouth tube body and the socket tube body.

Description of drawings

Fig. 1 is the schematic diagram of the composite pipe interface structure of embodiment 1 of the present invention;

Fig. 2 is the exploded view of the composite pipe joint structure of the embodiment 1 of the present invention;

Fig. 3 is the enlarged view of A part in Fig. 1;

Fig. 4 is the schematic diagram of the composite pipe of embodiment 1 of the present invention;

Fig. 5 is the schematic diagram of the composite pipe interface structure of embodiment 2 of the present invention;

FIG. 6 is an enlarged view of part B in FIG. 5 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

It should be noted that all directional indications (such as up, down, left, right, front, rear...) in the embodiments of the present invention are only used to explain the relative relationship between various components in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the descriptions involving "preferred", "less preferred", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "preferred" or "less preferred" may expressly or implicitly include at least one of that feature.

Example 1

Referring to FIG. 1 to FIG. 4 , the present invention proposes a composite pipe interface structure that can adapt to geological subsidence, including a socket pipe body 100 and a socket pipe body 200 .

The socket pipe body 100 includes a socket inner pipe 1 and a socket outer pipe 2 wrapped outside the socket inner pipe 1. The right end of the socket inner pipe 1 is provided with a socket section 10 protruding from the right end surface of the socket outer pipe 2. The inner side wall of the mouth section 10 is provided with a first locking convex portion 12 and a first centering concave surface 11 located on the left side of the first locking convex portion 12. The first centering concave surface 11 is a spherical concave surface or an ellipsoidal concave surface, an ellipsoid The ratio of the minor diameter to the major diameter of the ellipsoid determined by the concave surface is 0.8 to 1. The spherical center P or ellipsoid center defined by the first centering concave surface 11 is located on or near the axis of the socket body 1001 . The spherical center P or the ellipsoid center is the rotation center when the socket inner tube 1 and the socket inner tube 3 rotate relative to each other.

The socket body 200 includes a socket inner tube 3 and a socket outer tube 4 wrapped around the socket inner tube 3. A left end of the socket inner tube 3 and the left end of the socket outer tube 4 are formed into which the socket section 10 can be inserted. The socket 5, the outer side wall of the socket inner tube 3 is provided with a first arc-shaped convex surface 31 that fits with the first centering concave surface 11, and the right side of the first arc-shaped convex surface 31 is provided with a second latching convex portion 32. There is a gap between the second locking convex part 32 and the first locking convex part 12 and the two can abut to limit the separation of the socket inner pipe 1 and the socket inner pipe 3, and the socket inner pipe 1 and the socket inner pipe 3. A sealing structure is also arranged therebetween.

The material of the socket inner pipe 1 and the socket inner pipe 3 is PE, PP-R, PVC or HDPE, all of which are soft and have a little elasticity.

The socket outer tube 4 and the socket outer tube 2 are made of rigid materials, such as reinforced concrete structure or steel.

In a preferred solution of this embodiment, the socket outer pipe 4 and the socket outer pipe 2 are both cement pipes. In order to improve the adhesion of the socket inner pipe 3 and the socket inner pipe 1 to the cement, the socket inner pipe 3 and the socket inner pipe The outer sidewall of 1 is provided with a relief structure. The relief structures may be annular reliefs 20 arranged in the circumferential direction, helical reliefs arranged in the circumferential direction, elongated reliefs arranged in the axial direction, or the like.

A gap may be left between the left end face of the socket outer tube 4 and the right end face of the socket outer tube 2, or it may be directly tightened, or an elastic washer, such as a rubber washer, may be added between the two.

Taking the first centering concave surface 11 as a spherical concave surface as an example, the first arc-shaped convex surface 31 is a spherical convex surface attached thereto. When geological subsidence occurs, pipeline joints will be bent under pressure, and adjacent pipeline joints will bend in different directions. Between adjacent pipes, the socket inner pipe 3 and the socket inner pipe 1 can rotate relative to a certain angle around the spherical center P determined by the first centering concave surface 11, so that the pipe interface can withstand large bending deformation; in addition, Since the first centering concave surface 11 and the first arc-shaped convex surface 31 are spherical surfaces that fit each other, after the spigot inner tube 3 and the socket inner tube 1 are rotated relative to a certain angle, they still remain close to each other, which can effectively improve the sealing performance. At the same time, the connection strength of the socket pipe body 100 and the socket pipe body 200 can be improved.

Further, the inner side wall of the socket section 10 is provided with a second centering concave surface 13 , which is located on the right side of the first centering concave surface 11 , and the second centering concave surface 13 is a spherical concave surface that shares a spherical center with the first centering concave surface 11 . , a second arc-shaped convex surface 33 that fits with the second centering concave surface 13 is arranged on the outer side wall of the inner tube 3 of the socket. The cooperation of the second centering concave surface 13 and the second arc-shaped convex surface 33 can further improve the effect of rotation centering, and at the same time improve the sealing performance and connection strength.

Further, the right side of the second centering concave surface 13 is provided with a third locking protrusion 14 , and the right side of the second arc-shaped convex surface 33 is provided with a third locking protrusion 14 that can abut against the socket inner tube. 3. The fourth locking protrusion 34 that is separated from the inner tube 1 of the socket.

Referring to FIG. 3 , in this embodiment, the sealing structure includes a groove arranged on the first centering concave surface 11 and a first sealing ring 6 fixedly arranged in the groove. The inner surface of the first sealing ring 6 protrudes from the first Centering the concave surface 11 and interference fit with the first arc-shaped convex surface 31 . The above-mentioned groove can be extruded by hot pressing, or can be processed by a lathe. The first sealing ring 6 is preferably a rubber O-ring, which can be fixed in the above-mentioned groove by hot pressing.

Further, the sealing structure also includes a third sealing ring 7 located between the socket section 10 and the socket pipe body 200, and the inner side wall of the socket outer pipe 4 is provided with a tapered section 41 that gradually narrows from left to right. When the body 200 and the socket body 100 are connected together, the socket section 10 is inserted into the slot 5, and at this time, the socket section 10 is squeezed by the conical section 41 to compress the third sealing ring 7, which further improves the The sealing properties of the present invention.

In a specific solution of this embodiment, the third sealing ring 7 is fixed at the third locking protrusion 14 by hot pressing or gluing, and the third sealing ring 7 protrudes from the inner side of the socket section 10 surface.

When the first centering concave surface 11 is an ellipsoid concave surface, the ratio of the small diameter to the large diameter of the ellipsoid determined by it is 0.8 to 1. Such an ellipsoid is very close to a sphere, and because the socket inner tube 3 and the socket inner tube 1 It is a plastic pipe and has a certain elasticity. The relative rotation range of the socket inner pipe 3 and the socket inner pipe 1 is generally 0-1.5 degrees. Therefore, when geological subsidence occurs, the working principle of this scheme is the same as that of the first centering concave surface 11. The scheme for spherical concave is basically the same.

Referring to FIG. 4 , the present invention provides a composite pipe capable of being socketed to form the above-mentioned composite pipe interface structure. One end of the composite pipe is provided with the above-mentioned socket pipe body 100 , and the other end is provided with the above-mentioned socket pipe body 200 .

Example 2

FIG. 5 and FIG. 6 show Embodiment 2 of the composite pipe joint structure of the present invention. This embodiment has a similar structure to Embodiment 1, and the difference lies in the following two points.

First, in this embodiment, the second centering concave surface 13 is located on the left side of the first centering concave surface 11 .

Second, in this embodiment, the specific structure of the sealing structure between the socket inner pipe 1 and the socket inner pipe 3 is as follows.

In this embodiment, the sealing structure includes a groove disposed on the first arc-shaped convex surface 31 and a second sealing ring 8 fixedly disposed in the groove. The outer surface of the second sealing ring 8 protrudes from the first arc-shaped convex surface 31 And interference fit with the first centering concave surface 11 . The above-mentioned sealing structure also includes a third sealing ring 7 located between the socket section 10 and the socket pipe body 200, and the inner side wall of the socket outer pipe 4 is provided with a tapered section 41 that gradually shrinks from left to right, and the socket pipe body is When 200 and the socket body 100 are connected together, the socket section 10 is inserted into the slot 5, and at this time, the socket section 10 is pressed by the conical section 41 to compress the third sealing ring 7.

In a specific solution of this embodiment, the third sealing ring 7 is fixed at the third locking protrusion 14 by hot pressing or gluing, and the third sealing ring protrudes from the inner surface of the socket section 10 .

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the description and drawings of the present invention, or directly or indirectly applied to other All relevant technical fields are included within the scope of patent protection of the present invention.

Claims (10)

1. a composite pipe interface structure adaptable to geological subsidence, comprising a socket pipe body (100) and a socket pipe body (200), characterized in that, The socket pipe body (100) comprises a socket inner pipe (1) and a socket outer pipe (2) wrapped outside the socket inner pipe (1), and the right end of the socket inner pipe (1) is provided with a socket inner pipe (1). A socket section (10) protruding from the right end face of the socket outer tube (2), the inner side wall of the socket section (10) is provided with a first centering concave surface (11), the first fixed The central concave surface (11) is a spherical concave surface or an ellipsoidal concave surface, and the ratio of the minor diameter to the major diameter of the ellipsoid determined by the ellipsoidal concave surface is 0.8 to 1; The socket body (200) comprises a socket inner pipe (3) and a socket outer pipe (4) wrapped outside the socket inner pipe (3), and the left end of the socket inner pipe (3) and A slot (5) into which the socket section (10) can be inserted is formed between the left ends of the socket outer tube (4), and the outer side wall of the socket inner tube (3) is provided with a connection with the first socket section (10). A first arc-shaped convex surface (31) that is abutted with the centering concave surface (11), and a sealing structure is also provided between the socket inner pipe (1) and the socket inner pipe (3). 2. The composite pipe interface structure adaptable to geological subsidence according to claim 1, characterized in that, the inner side wall of the socket section (10) is provided with a A first locking protrusion (12), a second locking protrusion (32) is provided on the right side of the first arc-shaped convex surface (31), and the second locking protrusion (32) is connected to the first locking protrusion (32). A space is left between the protruding parts (12), and the two can abut so as to limit the detachment of the socket inner pipe (1) and the socket inner pipe (3). 3. The composite pipe interface structure adaptable to geological subsidence according to claim 1 or 2, characterized in that, the inner side wall of the socket section (10) is provided with a second centering concave surface (13), and the The first centering concave surface (11) is a spherical concave surface, the second centering concave surface (13) is a spherical concave surface that shares the spherical center with the first centering concave surface (11), and the socket inner pipe (3) ) is provided with a second arc-shaped convex surface (33) that fits with the second centering concave surface (13). 4. The composite pipe interface structure adaptable to geological subsidence according to claim 1, characterized in that, the sealing structure comprises a groove arranged on the first centering concave surface (11) and a groove fixedly arranged on the first centering concave surface (11). The first sealing ring (6) of the groove, the inner surface of the first sealing ring (6) protrudes from the first centering concave surface (11) and is in contact with the first arc-shaped convex surface (31). ) interference fit. 5. The composite pipe interface structure adaptable to geological subsidence according to claim 1, wherein the sealing structure comprises a groove arranged on the first arc convex surface (31) and a groove fixedly arranged on the first arc convex surface (31). The second sealing ring (8) of the groove, the outer surface of the second sealing ring (8) protrudes from the first arc-shaped convex surface (31) and is in contact with the first centering concave surface (11). ) interference fit. 6. The composite pipe interface structure adaptable to geological subsidence according to claim 1, characterized in that, the sealing structure comprises a third joint located between the socket section (10) and the socket pipe body (200). A sealing ring (7), the inner side wall of the socket outer tube (4) is provided with a tapered section (41) gradually narrowing from left to right, and the socket section (10) is inserted into the slot (5) ) is squeezed by the conical section (41) to compress the third sealing ring (7). 7. The composite pipe interface structure adaptable to geological subsidence according to claim 6, characterized in that, the third sealing ring (7) is fixedly arranged on the inner sidewall of the socket section (10) and protrudes from the The inner surface of the socket section (10). 8. The composite pipe interface structure adaptable to geological subsidence according to claim 7, characterized in that, a convex portion is provided on the inner side wall of the socket section (10), and the third sealing ring (7) fixed on the convex portion. 9. The composite pipe interface structure adaptable to geological subsidence according to claim 1, wherein the socket outer pipe (4) and the socket outer pipe (2) are both cement pipes, and the socket inner pipe ( 3) Both the outer side wall of the socket inner pipe (1) are provided with a relief structure capable of improving the adhesion to cement. 10. A composite pipe, characterized in that one end of the composite pipe is provided with the socket pipe body (100) according to any one of claims 1-9, and the other end is provided with the socket pipe body (100) according to any one of claims 1-9. The socket body (200) of an item.

Images