CN112050009A - Bendable pipeline socket structure - Google Patents

Abstract

The invention discloses a bendable pipeline bell and spigot structure, which comprises: socket body, socket body and set up the seal structure between socket body and socket body. The inner wall of the bellmouth pipe body is provided with a bellmouth connecting section, a limiting step is arranged in the bellmouth pipe body, the step surface of the limiting step is a rotating and centering concave surface, and the rotating and centering concave surface is a spherical concave surface or an ellipsoidal concave surface; leave the clearance between the outer wall of socket body and the inner wall of bellmouth body, be provided with the socket linkage segment on the outer wall of socket body, be provided with the connection structure that can restrict socket body and bellmouth body and break away from between socket linkage segment and the bellmouth linkage segment, the left end face of socket 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 the relative rotation of socket body. The invention can adapt to geological settlement and has excellent sealing performance.

Description

Bendable pipeline socket structure

Technical Field

The invention relates to a pipeline bell and spigot structure, in particular to a bendable pipeline bell and spigot 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 the above, the present invention aims to provide a pipe socket 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 socket structure comprising:

the inner wall of the socket pipe body is provided with a socket connecting section, a limiting step is arranged in the socket pipe body, the step surface of the limiting step is a rotating centering concave surface, the rotating centering concave surface is a spherical concave surface or an ellipsoidal concave surface, the ellipsoidal concave surface determines an ellipsoid, and the ratio of the minor diameter to the major diameter of the ellipsoid is 0.9-1;

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, 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, an arc-shaped rotation centering convex surface is arranged on the left end face of the socket pipe body, the rotation centering convex surface is attached to the rotation centering concave surface, and the rotation center of the socket pipe body and the socket pipe body during relative rotation is determined;

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

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, 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 rotation centering concave surface is a spherical concave surface, a first binding surface is arranged on the inner wall of the left side of at least one annular groove, the first binding surface is a spherical concave surface sharing the spherical center with the rotation centering concave surface, a second binding surface attached to the first binding surface is arranged on the left side wall of the annular bulge, and a gap is reserved between the right side wall of the annular bulge and the inner wall of the right side of the annular groove.

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 and bellmouth cooperation section set gradually from the right side to a left 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 and socket cooperation section set gradually from the right side to a left side, all leave the clearance between socket cooperation section and the bellmouth cooperation section.

Preferably, the socket centering section is provided with an arc-shaped concave surface which is concentric with the rotating centering concave surface, and the socket centering section is provided with an arc-shaped convex surface which is attached to the arc-shaped concave surface.

Preferably, the gap between the socket fitting section and the socket fitting section is a first gap, the gap between the right side wall of the annular protrusion and the right side inner wall of the annular groove is a second gap, the width of each second gap gradually increases from right to left, and the width of all the second gaps is smaller than the minimum width of the first gap.

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

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 is arranged on the socket pipe body, and a gap is reserved between the socket step and the right end face of the socket pipe body.

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

Preferably, the sealing ring is made of water-swelling material.

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

Preferably, the socket body is wrapped with a rigid reinforcing sleeve.

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, because the first binding surface is a spherical concave surface which is concentric with the rotating centering concave surface, the second binding surface is a spherical convex surface which is bound with the first binding surface, and a gap is left between the right side wall of the annular bulge and the right side inner wall of the annular groove. When the socket pipe body and the socket pipe body rotate relatively around the sphere center P determined by the arc-shaped concave surface, the first binding surface and the second binding surface can also slide relatively, but are always kept attached tightly, and the sealing performance and the connection strength can be further improved.

Fourthly, 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.

Fifthly, 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.

Sixthly, the strength of the socket pipe body can be increased by the reinforcing sleeve wrapped outside the socket pipe body, so that the wall thickness of the socket pipe body can be designed to be as thin as possible, and a space is reserved for improving the wall thickness of the socket pipe body.

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 structural view of embodiment 2 of the present invention;

fig. 6 is a partially enlarged view of a portion B in fig. 5;

fig. 7 is a schematic view of the fitting structure of the socket connection segment and the socket connection segment in embodiment 3 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, an embodiment of the present invention provides a bendable pipe socket structure, including: a socket pipe body 1, a socket pipe body 2 which can be inserted into the socket pipe body 1 from the right end opening thereof, and a sealing structure. The inner wall of the socket pipe body 1 is provided with a socket connecting section 12, a limiting step is arranged in the socket pipe body 1, the step surface of the limiting step is a rotating centering concave surface 400, the rotating centering concave surface 400 is a spherical concave surface or an ellipsoidal concave surface, the ellipsoidal concave surface determines an ellipsoid, and the ratio of the minor diameter to the major diameter of the ellipsoid is 0.9-1; 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, 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, an arc-shaped rotating centering convex surface 25 is arranged on the left end surface of the socket pipe body 2, the rotating centering convex surface 25 is attached to the rotating centering concave surface 400, and the rotating center of the socket pipe body 1 and the socket pipe body 2 during relative rotation is determined; the sealing structure is arranged between the socket pipe body 2 and the socket pipe body 1.

Preferably, the rotation centering concavity 400 defines a spherical center P or an ellipsoidal center on the axis of the socket pipe 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 400 is a spherical concave surface, the rotation centering convex surface 25 is a spherical convex surface attached to the rotation centering concave surface, and a gap is reserved between the socket pipe body and the socket pipe body, so that when geological settlement occurs, a pipeline interface is pressed to be bent, 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 400, 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 400 and the rotation centering convex surface 25 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 400 is an ellipsoidal concave surface, the ratio of the minor diameter to the major diameter of the determined ellipsoid is 0.9-1, the ellipsoid is very close to a sphere, and the socket structure of the invention is a pipeline socket 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 400 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 and bellmouth cooperation section 13 set gradually from right side to left 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 and socket cooperation section 23 set gradually from right side to left side, all leave 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 in the socket connection segment 12, and a plurality of annular protrusions 200 disposed in the socket connection segment 22, and 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. When the tooth shape of the annular protrusion 200 is triangular, the annular protrusion 200 only has left and right side walls, a gap may be left only on one side of the annular protrusion 200, or gaps may be left on both sides of the annular protrusion 200; when the tooth shape of the annular protrusion 200 is trapezoidal or arc protrusion, the annular protrusion 200 has a left side wall, a right side wall, and a top wall, and a gap may be left only between the left side and the upper side of the annular protrusion 200, a gap may be left only between the right side and the upper side of the annular protrusion 200, or a gap may be left between the left side, the right side, and the upper side of the annular protrusion 200.

In other aspects of the present invention, such as embodiment 3 shown in fig. 7, the connection structure includes an internal thread 121 provided on the socket connection section 12 and an external thread 221 provided on the socket connection section 22, and the internal thread 121 is engaged with the external thread 221 with a gap therebetween. The thread shape of the thread is triangle, trapezoid or arc bulge.

Referring to fig. 3, in embodiment 1 of the present invention, the rotation centering concave 400 is a spherical concave, the inner wall of the left side of the at least one annular groove 100 is provided with a first abutting surface 101, the first abutting surface 101 is a spherical concave concentric with the rotation centering concave 400, the left side wall of the annular protrusion 200 is provided with a second abutting surface 102 abutting against the first abutting surface 101, and a gap is left between the right side wall of the annular protrusion 200 and the inner wall of the right side of the annular groove 100. When the socket pipe body and the socket pipe body rotate relatively around the sphere center P determined by the arc-shaped concave surface, the first binding surface and the second binding surface can also slide relatively, but are always kept attached tightly, and the sealing performance and the connection strength can be further improved.

As a further modification of embodiment 1, the socket centering section 11 is provided with a circular arc-shaped concave surface 111 concentric with the rotation centering concave surface 400, and the socket centering section 21 is provided with a circular arc-shaped convex surface 211 abutting against the circular arc-shaped 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 embodiment 1, the gap between the socket fitting section 23 and the socket fitting section 13 is a first gap 300, the gap between the right side wall of the annular protrusion 200 and the right side inner wall of the annular groove 100 is a second gap 500, the width of each second gap 500 is gradually increased from right to left, and the width of all the second gaps 500 is smaller than the minimum width of the first gap 300. The width of the first gap 300 gradually increases from right to left. 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.

In the invention, the socket step 24 is arranged on the socket pipe body 2, and a gap is reserved between the socket step 24 and the right end face of the socket pipe body 1, so that the socket pipe body 2 and the socket pipe body 1 can rotate relatively.

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.

In order to improve the strength of the socket pipe body 1, a rigid reinforcing sleeve 6 is wrapped outside the socket pipe body 1, and the reinforcing sleeve 6 is made of metal materials or reinforced concrete.

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. The utility model provides a pipeline socket structure that can buckle which characterized in that includes:

the pipe socket comprises a socket pipe body (1), wherein a socket connecting section (12) is arranged on the inner wall of the socket pipe body (1), a limiting step is arranged in the socket pipe body (1), the step surface of the limiting step is a rotating centering concave surface (400), the rotating centering concave surface (400) is a spherical concave surface or an ellipsoidal concave surface, the ellipsoidal concave surface determines an ellipsoid, and the ratio of the minor diameter to the major diameter of the ellipsoid is 0.9-1;

the socket pipe body (2) can be inserted into the socket pipe body (1) from the right port 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), 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), an arc-shaped rotation centering convex surface (25) is arranged on the left end face of the socket pipe body (2), the rotation centering convex surface (25) is attached to the rotation centering concave surface (400) and determines the rotation center of the socket pipe body (1) and the socket pipe body (2) during relative rotation;

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

2. A bendable pipe socket structure according to claim 1, wherein the center of sphere P or ellipsoid defined by the concave surface (400) for rotational centering is located on the axis of the socket body (1).

3. A bendable pipe socket structure according to claim 1, wherein the connection structure comprises a plurality of annular grooves (100) provided in the socket connection section (12) and a plurality of annular protrusions (200) provided in the spigot connection section (22), each annular protrusion (200) is snapped into one of the annular grooves (100) with a gap therebetween.

4. The collapsible pipe socket structure according to claim 3, wherein the rotating centering concave surface (400) is a spherical concave surface, the inner wall of the left side of the at least one annular groove (100) is provided with a first abutting surface (101), the first abutting surface (101) is a spherical concave surface concentric with the rotating centering concave surface (400), the left side wall of the annular protrusion (200) is provided with a second abutting surface (102) abutting against the first abutting surface (101), and a gap is left between the right side wall of the annular protrusion (200) and the inner wall of the right side of the annular groove (100).

5. The bendable pipe socket structure according to claim 4, wherein the inner wall of the socket pipe body (1) is further provided with a socket centering section (11) and a socket matching section (13), the socket centering section (11), the socket connecting section (12) and the socket matching section (13) are sequentially arranged from right to left, the outer wall of the socket pipe body (2) is further provided with a socket centering section (21) and a socket matching section (23), the socket centering section (21), the socket connecting section (22) and the socket matching section (23) are sequentially arranged from right to left, and a gap is reserved between the socket matching section (23) and the socket matching section (13).

6. The bendable pipe socket structure according to claim 5, wherein the socket centering section (11) is provided with a circular arc concave surface (111) concentric with the rotation centering concave surface (400), and the socket centering section (21) is provided with a circular arc convex surface (211) attached to the circular arc concave surface (111).

7. A bendable pipe socket structure according to claim 5, wherein the gap between the spigot fitting section (23) and the socket fitting section (13) is a first gap (300), the gap between the right side wall of the annular projection (200) and the right side inner wall of the annular groove (100) is a second gap (500), the width of each second gap (500) is gradually increased from right to left, and the width of all second gaps (500) is smaller than the minimum width of the first gap (300).

8. A bendable pipe socket structure according to claim 1, wherein the spigot body (2) is provided with a spigot step (24), and a gap is left between the spigot step (24) and the right end surface of the socket body (1).

9. The bendable pipe socket structure according to claim 6, 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.

10. A bendable pipe socket structure according to claim 1, wherein the socket body (1) is externally wrapped with a rigid reinforcing sleeve (6).

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