CN112050007A - Bendable pipeline interface structure - Google Patents

Abstract

The invention discloses a bendable pipeline interface structure, which comprises: socket body, socket body and set up in seal structure. A bellmouth connecting section is arranged on the inner wall of the bellmouth pipe body; a gap is reserved between the outer wall of the socket pipe body and the inner wall of the socket pipe body, a socket connecting section is arranged on the outer wall of the socket pipe body, and a connecting structure capable of limiting the socket pipe body to be separated from the socket pipe body is arranged between the socket connecting section and the socket connecting section. Be provided with the socket step on the socket body, be provided with on the socket step and rotate centering concave surface, rotate centering concave surface and be spherical concave surface or ellipsoid shape concave surface, the right-hand member face of bellmouth body is provided with curved rotation centering convex surface, rotates centering convex surface and rotates the center of rotation when centering concave surface laminates mutually and confirm bellmouth body and socket body relative rotation. The invention can adapt to geological settlement and has excellent sealing performance.

Description

Bendable pipeline interface structure

Technical Field

The invention relates to a pipeline interface structure, in particular to a bendable pipeline interface structure.

Background

Pipelines are devices for transporting gases, liquids or fluids with solid particles, which are widely used in hydraulic engineering and various industrial devices. The pipeline is usually made of reinforced concrete or other soft materials (such as PE, HDPE and the like), and the connecting part of the pipeline made of reinforced concrete has the defects of no tensile strength, low water-stopping performance, poor corrosion resistance and the like, so the application prospect of the pipeline is lower than that of the pipeline made of soft materials.

The existing connection modes between pipe joints of large-caliber flexible pipes generally include hot melt butt joint, clamp connection, heat shrinkable tape connection, threaded connection or clamping connection, self-locking socket type connection and the like. The self-locking socket type connection can be installed with water, the installation space is small, the construction is safer, the butt joint speed is high, and the method is a substitute method for pipeline design and construction, saves time and cost, and can reduce the construction space on a large scale.

In the traditional socket type pipeline joint, a first annular bulge is arranged on the outer surface of a pipeline socket, a second annular bulge is arranged on the inner surface of a pipeline socket, after the socket is butted with the socket, the front side surface of the first annular bulge is tightly attached to the rear side surface of the second annular bulge, and the rear side surface of the first annular bulge is tightly attached to the front side surface of the second annular bulge; however, the following problems also exist: due to the fact that the situations of earthquake, underground water exhaustion, large buildings newly built and the like can cause geological settlement of different degrees, when the geological settlement occurs, the joints of the two pipelines can bend along with the geological settlement, and due to the fact that the pipeline joint structure is very tightly connected, stress at the joints of the pipelines cannot be released, and the joints are seriously cracked.

In order to solve the problems, the invention patent with the application number of 201810293022.

The pipe joint structure has the following problems that the joint of the socket and the joint is loose, the joint strength is low, and the sealing performance of the joint of the socket and the joint is poor due to the fact that a gap exists between the front side surface of the first annular bulge and the rear side surface of the corresponding second annular bulge and a gap also exists between the rear side surface of the first annular bulge and the front side surface of the corresponding second annular bulge.

Disclosure of Invention

In view of this, the present invention aims to provide a pipe joint structure which can adapt to geological settlement and has excellent sealing performance.

The technical scheme adopted by the invention for solving the technical problem is as follows:

a bendable pipe interface structure comprising:

the inner wall of the bellmouth pipe body is provided with a bellmouth connecting section;

the socket pipe body can be inserted into the socket pipe body from the right port of the socket pipe body, a gap is reserved between the outer wall of the socket pipe body and the inner wall of the socket pipe body, a socket connecting section is arranged on the outer wall of the socket pipe body, and a connecting structure capable of limiting the socket pipe body and the socket pipe body to be separated is arranged between the socket connecting section and the socket connecting section;

the sealing structure is arranged between the socket pipe body and the socket pipe body;

the socket body on be provided with the socket step, be provided with on the socket step and rotate centering concave surface, rotation centering concave surface be spherical concave surface or ellipsoid concave surface, an ellipsoid is confirmed to the ellipsoid concave surface, the minor diameter of ellipsoid and major diameter's ratio are 0.9 ~ 1, the right-hand member face of socket body be provided with curved rotation centering convex surface, rotation centering convex surface with rotate centering concave surface and laminate mutually and confirm the centre of rotation when socket body and socket body rotate relatively.

Preferably, the centre of sphere P or ellipsoid defined by said concave surface of revolution is located on the axis of said socket body.

Preferably, still be provided with bellmouth centering section and bellmouth cooperation section on the inner wall of bellmouth body, bellmouth centering section, bellmouth linkage segment, bellmouth cooperation section set gradually from a left side to the right side, still be provided with socket centering section and socket cooperation section on the outer wall of socket body, socket centering section, socket linkage segment, socket cooperation section, socket step set gradually from a left side to the right side, all leave the clearance between socket cooperation section and the bellmouth cooperation section.

Preferably, the rotation centering convex surface and the rotation centering concave surface are a pair of spherical surfaces matched with each other, the socket centering section is provided with an arc-shaped concave surface which is concentric with the rotation centering convex surface, and the socket centering section is provided with an arc-shaped convex surface attached to the arc-shaped concave surface.

Preferably, the connecting structure comprises a plurality of annular grooves arranged on the socket connecting section and a plurality of annular protrusions arranged on the socket connecting section, each annular protrusion is clamped into one annular groove, and a gap is reserved between the annular protrusion and the annular groove.

Preferably, the gap between the socket fitting section and the socket fitting section is a first gap, the distance between the tooth crest of the annular protrusion and the groove bottom of the annular groove is a first distance, the values of the first distances are gradually increased from left to right, and all the values of the first distances are smaller than the minimum width of the first gap.

Preferably, the width of the first gap gradually increases from left to right.

Preferably, the connection structure comprises an internal thread arranged on the socket connection section and an external thread arranged on the socket connection section, and the internal thread is meshed with the external thread with a gap left between the internal thread and the external thread.

Preferably, a socket step which is opposite to the left end face of the socket pipe body is arranged in the socket pipe body, and a gap is reserved between the socket step and the left end face of the socket pipe body.

Preferably, the sealing structure comprises a sealing groove arranged between the socket centering section and a sealing ring arranged in the sealing groove,

the sealing ring is made of a water-swellable material;

or the sealing ring comprises a rubber sealing ring inner core and an expansion layer wrapped outside the rubber sealing ring inner core, and the expansion layer is made of a water-swelling material.

The invention has the beneficial effects that:

first, because the centering concave surface of rotation is laminated each other with the centering convex surface of rotation, and leave the clearance between socket body and the bellmouth body, consequently when taking place the geology and subside, socket body and bellmouth body can be round the certain angle of the relative rotation of the definite center of rotation of centering concave surface of rotation for the pipeline kneck can bear great bending deformation, avoids pipeline kneck stress too big and break.

And secondly, because the rotating centering concave surface and the rotating centering convex surface are spherical surfaces or ellipsoidal surfaces which are mutually attached, after the socket pipe body and the socket pipe body rotate for a certain angle relatively, the socket pipe body and the socket pipe body still keep close contact, the sealing performance can be effectively improved, and meanwhile, the connection strength of the socket pipe body and the socket pipe body can be improved.

And thirdly, the arc-shaped concave surface is a spherical concave surface which is concentric with the rotating centering concave surface, and the arc-shaped convex surface is a spherical convex surface which is attached to the arc-shaped concave surface. When the socket pipe body and the socket pipe body rotate relatively around the sphere center P, the arc-shaped concave surface and the arc-shaped convex surface can also slide relatively, but are always kept to be attached tightly, and the sealing performance and the connection strength can be further improved.

Fourth, adopt and meet water expanding material and seal, when the condition of leaking appears in seal groove department, meet water expanding material can expand, plug up the position of leaking, promote sealing performance.

Drawings

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

FIG. 2 is a schematic structural view showing an exploded state of embodiment 1 of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 1;

FIG. 4 is a schematic structural view of a pipe body for assembling and forming embodiment 1 of the present invention;

fig. 5 is a schematic view of the fitting structure of the socket connection segment and the socket connection segment in embodiment 2 of the present invention.

Detailed Description

The technical solution 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 the directional indicators (such as up, down, left, right, front, and rear …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "preferred", "less preferred", etc. in the present invention are 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 "preferred" or "less preferred" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 5, an embodiment of the present invention provides a bendable pipe joint structure, including: socket body 1, can insert its inside socket body 2 from the right-hand member mouth of socket body 1 and set up the seal structure between socket body 2 and socket body 1. A bellmouth connecting section 12 is arranged on the inner wall of the bellmouth pipe body 1; a gap is reserved between the outer wall of the socket pipe body 2 and the inner wall of the socket pipe body 1, a socket connecting section 22 is arranged on the outer wall of the socket pipe body 2, and a connecting structure capable of limiting the socket pipe body 2 to be separated from the socket pipe body 1 is arranged between the socket connecting section 22 and the socket connecting section 12.

Be provided with the socket step on the socket body 2, be provided with on the socket step and rotate centering concave 24, it is spherical concave surface or ellipsoidal concave surface to rotate centering concave 24, an ellipsoid is confirmed to the ellipsoidal concave surface, the minor diameter of ellipsoid and major diameter's ratio is 0.9 ~ 1, the right-hand member face of socket body 1 is provided with curved rotation centering convex surface 400, rotation centering convex surface 400 laminates mutually with rotation centering concave 24 and confirms the rotation center when socket body 1 rotates with socket body 2 relatively.

Preferably, the centre of the sphere P or ellipsoid defined by the concave surface 24 of revolution is located on the axis of the socket body 1. The spherical center P or the ellipsoidal center is the rotation center when the socket body 1 and the socket body 2 rotate relatively.

The socket pipe body 1 and the socket pipe body 2 are made of PE, PP-R, PVC or HDPE which are soft and have a little elasticity.

When the rotation centering concave surface 24 is a spherical concave surface, the rotation centering convex surface 400 is a spherical convex surface attached to the rotation centering concave surface, and a gap is reserved between the socket pipe body 2 and the socket pipe body 1, so that a pipeline interface can be pressed and bent when geological settlement occurs, the socket pipe body 2 and the socket pipe body 1 can relatively rotate for a certain angle around a spherical center P determined by the rotation centering concave surface 24, the pipeline interface can bear larger bending deformation, and the pipeline interface is prevented from being broken due to overlarge stress; in addition, because the rotation centering concave surface 24 and the rotation centering convex surface 400 are spherical surfaces which are mutually attached, after the socket pipe body 2 and the socket pipe body 1 rotate for a certain angle relatively, the socket pipe body 2 and the socket pipe body 1 still keep close contact, the sealing performance can be effectively improved, and meanwhile, the connection strength of the socket pipe body 2 and the socket pipe body 1 can be improved.

When the rotating centering concave surface 24 is an ellipsoidal concave surface, the ratio of the small diameter to the large diameter of the determined ellipsoid is 0.9-1, the ellipsoid is very close to a sphere, and the interface structure of the invention is a pipeline interface structure and has certain elasticity, and the relative rotation range of the socket pipe body 2 and the socket pipe body 1 is generally 0-1.5 degrees, so that the working principle of the scheme is basically the same as that of the scheme that the rotating centering concave surface 24 is a spherical concave surface when geological settlement occurs.

Further, still be provided with bellmouth centering section 11 and bellmouth cooperation section 13 on the inner wall of bellmouth body 1, bellmouth centering section 11, bellmouth linkage segment 12, bellmouth cooperation section 13 set gradually from a left side to the right side, still be provided with socket centering section 21 and socket cooperation section 23 on the outer wall of socket body 2, socket centering section 21, socket linkage segment 22, socket cooperation section 23, the socket step sets gradually from a left side to the right side, all leaves the clearance between socket cooperation section 23 and the bellmouth cooperation section 13.

The socket mating section 13 and the socket mating section 23 are cylindrical or conical flat wall sections, and the socket connecting section 22 and the socket connecting section 12 may be cylindrical sections or tapered sections which gradually decrease from right to left.

In some aspects of the present invention, such as embodiment 1 shown in fig. 1 and embodiment 2 shown in fig. 5, the connection structure includes a plurality of annular grooves 100 disposed on the socket connection segment 12, and a plurality of annular protrusions 200 disposed on the socket connection segment 22, each annular protrusion 200 is inserted into one of the annular grooves 100 with a gap therebetween. The tooth shape of the annular protrusion 200 is triangular, trapezoidal, or arc protrusion.

In other aspects of the present invention, the connection structure includes an internal thread provided on the socket connection section 12 and an external thread provided on the socket connection section 22, the internal thread being engaged with the external thread with a gap therebetween. The thread shape of the thread is triangle, trapezoid or arc bulge.

In embodiment 1, the gap between the spigot fitting section 23 and the socket fitting section 13 is a first gap 300, the distance between the tooth crest of the annular protrusion 200 and the groove bottom of the annular groove 100 is a first distance 500, and when the tooth form of the annular protrusion 200 is a triangular or circular arc protrusion form, the value of the first distance 500 is the distance between the line connecting the vertex of the annular protrusion 200 and the lowest point of the groove bottom of the annular groove 100; when the tooth profile of the annular protrusion 200 is trapezoidal, a groove is formed between the tooth crest of the annular protrusion 200 and the groove bottom of the annular groove 100, and the value of the first distance 500 is the average width of the groove. The values of the respective first distances 500 are gradually increased from left to right, all the values of the first distances 500 are smaller than the minimum width of the first gap 300, and the width of the first gap 300 is gradually increased from left to right. In such design, the more distant position clearance apart from the rotation center is bigger, and the relative rotation takes place for socket body 2 and bellmouth body 1 of being convenient for, through can rationally distributed, satisfies under this requirement of interface flexible, guarantees socket body 2 and bellmouth body 1's the pipe wall thickness as far as possible and satisfies the requirement.

As a further modification of embodiments 1 and 2, the convex rotational centering surface 400 and the concave rotational centering surface 24 are a pair of spherical surfaces that fit each other. The socket centering section 11 is provided with an arc concave surface 111 which is concentric with the rotating centering convex surface 400, and the socket centering section 21 is provided with an arc convex surface 211 which is attached to the arc concave surface 111. When the socket pipe body and the socket pipe body rotate relatively around the sphere center P, the arc-shaped concave surface and the arc-shaped convex surface can also slide relatively, but are always kept to be attached tightly, and the sealing performance and the connection strength can be further improved.

In the invention, a bellmouth step which is opposite to the left end surface of the socket pipe body 2 is arranged in the bellmouth pipe body 1, and a gap is reserved between the bellmouth step and the left end surface of the socket pipe body.

The sealing structure comprises a sealing groove 3 arranged between the socket centering section 11 and the socket centering section 21 and a sealing ring arranged in the sealing groove 3, wherein the sealing ring adopts the following two schemes preferably, and the first sealing ring and the sealing ring are made of water-swelling materials; secondly, the sealing washer includes rubber seal inner core 4 and parcel inflation layer 5 outside rubber seal inner core 4, and inflation layer 5 is made by meeting water swelling material. When the condition of leaking appears in seal groove 3 department, meet water expanding material and can expand, plug up the position of leaking, promote sealing performance.

The above is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.

Claims (10)

1. A bendable pipe interface structure, comprising:

the inner wall of the bellmouth pipe body (1) is provided with a bellmouth connecting section (12);

the socket pipe body (2) can be inserted into the socket pipe body (1) from the right end opening of the socket pipe body, a gap is reserved between the outer wall of the socket pipe body (2) and the inner wall of the socket pipe body (1), a socket connecting section (22) is arranged on the outer wall of the socket pipe body (2), and a connecting structure capable of limiting the socket pipe body (2) to be separated from the socket pipe body (1) is arranged between the socket connecting section (22) and the socket connecting section (12);

the sealing structure is arranged between the socket pipe body (2) and the socket pipe body (1);

socket body (2) on be provided with the socket step, be provided with on the socket step and rotate centering concave surface (24), rotation centering concave surface (24) be spherical concave surface or ellipsoidal concave surface, an ellipsoid body is confirmed to the ellipsoidal concave surface, the ratio of the minor diameter and the major diameter of ellipsoid body is 0.9 ~ 1, the right-hand member face of socket body (1) be provided with curved rotation centering convex surface (400), rotation centering convex surface (400) with rotate centering concave surface (24) and laminate mutually and confirm the centre of rotation when socket body (1) rotates with socket body (2) relatively.

2. A bendable pipe joint according to claim 1, wherein the rotational centering concavity (24) defines a spherical center P or an ellipsoidal center on the axis of the socket body (2).

3. The bendable pipeline interface structure according to claim 1, wherein a bellmouth centering section (11) and a bellmouth matching section (13) are further arranged on the inner wall of the bellmouth pipe body (1), the bellmouth centering section (11), the bellmouth connecting section (12) and the bellmouth matching section (13) are sequentially arranged from left to right, a socket centering section (21) and a socket matching section (23) are further arranged on the outer wall of the socket pipe body (2), the socket centering section (21), the socket connecting section (22), the socket matching section (23) and the socket step are sequentially arranged from left to right, and gaps are reserved between the socket matching section (23) and the bellmouth matching section (13).

4. A bendable pipe joint structure according to claim 3, wherein the rotating centering convex surface (400) and the rotating centering concave surface (24) are a pair of spherical surfaces which are matched with each other, the socket centering section (11) is provided with an arc concave surface (111) which is concentric with the rotating centering convex surface (400), and the socket centering section (21) is provided with an arc convex surface (211) which is attached to the arc concave surface (111).

5. A bendable pipe interface structure according to claim 4, wherein the connection structure comprises a plurality of annular grooves (100) provided on the socket connection section (12) and a plurality of annular protrusions (200) provided on the socket connection section (22), each annular protrusion (200) is snapped into one annular groove (100) with a gap therebetween.

6. A bendable pipe interface structure according to claim 5, wherein the gap between the spigot mating section (23) and the socket mating section (13) is a first gap (300), the distance between the crest of the annular protrusion (200) and the trough bottom of the annular groove (100) is a first distance (500), the values of the first distances (500) are gradually increased from left to right, and all the values of the first distances (500) are smaller than the minimum width of the first gap (300).

7. The bendable pipe interface structure of claim 6, wherein the first gap (300) increases in width from left to right.

8. The bendable pipe joint according to claim 1, wherein the connection structure comprises an internal thread provided on the socket connection section (12) and an external thread provided on the socket connection section (22), the internal thread and the external thread being engaged with each other with a gap therebetween.

9. A bendable pipe joint structure according to claim 1, wherein a socket step is provided in the socket pipe (1) and faces the left end face of the socket pipe (2), and a gap is provided between the socket step and the left end face of the socket pipe.

10. A bendable pipe joint structure according to claim 3, wherein the sealing structure comprises a sealing groove (3) disposed between the socket centering section (11) and the socket centering section (21) and a sealing ring disposed in the sealing groove (3),

the sealing ring is made of a water-swellable material;

or the sealing ring comprises a rubber sealing ring inner core (4) and an expansion layer (5) wrapped outside the rubber sealing ring inner core (4), and the expansion layer (5) is made of a water-swelling material.

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