CN112050008A - Sealed pipeline bell and spigot structure - Google Patents

Abstract

The invention discloses a sealed pipeline bell and spigot structure which comprises a bell pipe body, a spigot pipe body and a sealing structure, wherein a bell centering section, a bell connecting section and a bell matching section are arranged on the inner wall of the bell pipe body; the outer wall of the socket pipe body is provided with a socket centering section, a socket connecting section and a socket matching section, the socket centering section is provided with an arc-shaped bending centering convex surface, and the bending centering convex surface is attached to the bending centering concave surface and determines the bending center of the pipe orifice; the sealing structure comprises a sealing groove arranged between the socket centering section and a sealing ring arranged in the sealing groove. After the pipeline bell and spigot is bent, the depth of the sealing groove is unchanged, and excellent sealing performance can still be maintained.

Description

Sealed pipeline bell and spigot structure

Technical Field

The invention relates to a pipeline bell and spigot structure, in particular to a sealed pipeline bell and spigot structure.

Background

The HDPE pipeline socket mode which is common in the market is a sealing ring socket. The HDPE solid wall short pipe joint of the socket joint is characterized in that a socket is cut out at one end, a socket is cut out at the other end, a pair of flat wall sections which are matched with each other are arranged on the inner wall of the socket and the inner wall of the socket, a sealing groove is arranged on the pair of flat wall sections, and O-shaped ring water stopping is arranged in the sealing groove.

Such interface structure has following problem, when taking place the geology and subside, because be subject to the lower rigidity of pipeline, pipeline socket department can take place a little bending, leads to the flat wall section on the flat wall section of socket one side and the socket to produce certain displacement, and then leads to the partly degree of depth of seal groove to increase, and the volume of the O type circle of setting in the seal groove can not increase, leads to can producing the clearance between sealing washer and the O type circle, and then the condition of appearing leaking, sealing performance is not good.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a sealed type pipe socket structure capable of maintaining excellent sealing performance after geological settlement occurs.

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

a sealed pipe socket structure, comprising:

the inner wall of the bellmouth pipe body is provided with a bellmouth centering section, a bellmouth connecting section and a bellmouth matching section, the bellmouth centering section is provided with an arc-shaped bending centering concave surface, and the bending centering concave surface is a spherical concave surface or an ellipsoidal concave surface;

the socket pipe body can be inserted into the socket pipe body from the right port of the socket pipe body, a socket centering section, a socket connecting section and a socket matching section are 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, the socket matching section and the socket matching section are mutually attached, and a bending centering convex surface attached to the bending centering concave surface is arranged on the socket centering section;

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

Preferably, the sealing ring is made of water-swellable 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, when the bending centering concave surface is an ellipsoidal concave surface, an ellipsoid is determined, and the ratio of the minor diameter to the major diameter of the ellipsoid is 0.9-1.

Preferably, the socket centering section, the socket connecting section and the socket matching section are sequentially arranged along a sequence from right to left, and the socket centering section, the socket connecting section and the socket matching section are sequentially arranged along a sequence from right to left.

Preferably, the bending centering concave surface is a spherical concave surface, a limiting step is arranged in the socket pipe body, the step surface of the limiting step is a spherical concave surface which is concentric with the bending centering concave surface, and the left end surface of the socket pipe body is an arc-shaped convex surface which is attached to the step 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, and each annular protrusion is clamped into one annular groove.

Preferably, the tooth shape of the annular protrusion is a triangle, a trapezoid or a circular arc protrusion.

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.

Preferably, the tooth shape of the external thread is triangular, trapezoidal or circular arc convex.

Preferably, a socket step is arranged on the socket pipe body, and a sealing gasket is arranged between the socket step and the right end face of the socket pipe body.

The invention has the beneficial effects that:

firstly, when the bell and spigot of the pipeline is bent due to geological settlement, the bending centering concave surface and the bending centering convex surface can play a role in determining the bending center, and the bending center is near the spherical center or the ellipsoidal center of the bending centering concave surface; in the process of bending the pipeline bell and spigot, the bending centering concave surface and the bending centering convex surface only can relatively rotate around the spherical center or the ellipsoidal center for sliding for a small distance, the bending centering concave surface and the bending centering convex surface are always kept to be attached tightly, and the depth of a sealing groove arranged between the bell mouth centering section and the spigot centering section is not changed. Therefore, the pipe socket of the present invention can maintain excellent sealing performance even after it is bent, compared to the conventional pipe socket.

Second, 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.

Thirdly, as the step surface is a spherical concave surface which is concentric with the bending centering concave surface, when the pipeline bell and spigot is bent, the pair of spherical surfaces of the step surface and the left end surface of the spigot pipe body can improve the function of determining the bending center, so that the bending center is near the spherical center point of the bending centering concave surface.

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 to 7, an embodiment of the present invention provides a sealed type 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 bellmouth pipe body 1 is provided with a bellmouth centering section 11, a bellmouth connecting section 12 and a bellmouth matching section 13, the bellmouth centering section 11 is provided with an arc-shaped bending centering concave surface 111, and the bending centering concave surface 111 is a spherical concave surface or an ellipsoidal concave surface; the outer wall of the socket pipe body 2 is provided with a socket centering section 21, a socket connecting section 22 and a socket matching section 23, 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 socket matching section 23 is tightly attached to the socket matching section 13, no gap is left between the socket matching section and the socket matching section, and the socket centering section 21 is provided with a bending centering convex surface 211 attached to the bending centering concave surface 111; 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.

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 bending centering concave surface 111 is an ellipsoidal concave surface, an ellipsoid is determined, the ratio of the minor diameter to the major diameter of the ellipsoid is 0.9-1, and the spherical center P or the ellipsoidal center determined by the bending centering concave surface 111 is positioned on the axis of the socket pipe body 1.

When the bending centering concave surface 111 is a spherical concave surface, the bending centering convex surface 211 is a spherical convex surface attached to the bending centering concave surface, and when the pipeline bell and spigot is bent due to geological settlement, the bending centering concave surface 111 and the bending centering convex surface 211 can play a role in determining a bending center, wherein the bending center is near the spherical center P point of the bending centering concave surface 111; in the process of bending the pipeline bell and spigot, the bending centering concave surface 111 and the bending centering convex surface 211 only rotate and slide for a small distance relative to each other by taking a spherical center point P as a center, the two are always kept close to each other, and the depth of the sealing groove 3 arranged between the bell mouth centering section 11 and the spigot centering section 21 is not changed. Therefore, the pipe socket of the present invention can maintain excellent sealing performance even after it is bent, compared to the conventional pipe socket.

When the bending centering concave surface 111 is an ellipsoidal concave surface, the bending centering convex surface 211 is an ellipsoidal convex surface attached to the bending centering concave surface, and the ratio of the minor diameter to the major diameter of the determined ellipsoid is 0.9-1, so that the ellipsoid is very close to a sphere, and therefore, when geological settlement occurs, the working principle of the scheme is basically the same as that of the scheme that the bending centering concave surface 111 is a spherical concave surface. When the pipeline bell and spigot is bent due to geological settlement, the bending centering concave surface 111 and the bending centering convex surface 211 can also play a role in determining the bending center, and the bending center is near the center point of an ellipsoid of the bending centering concave surface 111.

The sealing ring is preferably made of a water-swellable material; 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 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 one aspect of the present invention, the socket centering section 11, the socket connecting section 12, and the socket fitting section 13 are sequentially arranged in order from right to left, and the socket centering section 21, the socket connecting section 22, and the socket fitting section 23 are sequentially arranged in order from right to left. In some embodiments of the present invention, the socket centering section 11, the socket connecting section 12, and the socket engaging section 13 may be arranged in other ways, such as the socket centering section 11 being located at the leftmost side, the socket connecting section 12 being located at the middle position, and the socket engaging section 13 being located at the rightmost side.

Preferably, the bending centering concave surface 111 is a spherical concave surface, as a further improvement of the present invention, a limiting step is arranged in the socket pipe body 1, the step surface 400 of the limiting step is a spherical concave surface which is concentric with the bending centering concave surface 111, and the left end surface 25 of the socket pipe body 2 is an arc convex surface which is attached to the step surface 400. Since the step surface 400 is a spherical concave surface which is concentric with the bending centering concave surface 111, when the pipe socket is bent, the pair of spherical surfaces of the step surface 400 and the left end surface 25 of the socket pipe body 2 can enhance the function of determining the bending center, so that the bending center is near the spherical center point of the bending centering concave surface 111.

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 provided in the socket connection section 12, and a plurality of annular protrusions 200 provided in the socket connection section 22, each annular protrusion 200 being snapped into one of the annular grooves 100. The annular protrusion 200 is preferably in transition fit with the annular groove 100, that is, the outer wall of the annular protrusion 200 is just attached to the inner wall of the annular groove 100 or a small gap is left between the two. The tooth shape of the annular protrusion 200 is triangular, trapezoidal, or arc protrusion.

In other aspects of the 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, the internal thread 121 engaging with the external thread 221. The thread shape of the external thread 221 is triangular, trapezoidal or arc convex, and the thread shape of the internal thread 121 is matched with the thread shape.

In order to further improve the sealing performance of the present invention, the socket step 24 is disposed on the socket pipe body 2, and a sealing gasket 300 is disposed between the socket step 24 and the right end face of the socket pipe body 1.

In order to improve the strength of the socket pipe body 1, a rigid reinforcing sleeve pipe can be wrapped outside the socket pipe body 1, and the reinforcing sleeve pipe 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 canned type pipeline socket structure which characterized in that, it includes:

the pipe comprises a socket pipe body (1), wherein a socket centering section (11), a socket connecting section (12) and a socket matching section (13) are arranged on the inner wall of the socket pipe body (1), an arc-shaped bending centering concave surface (111) is arranged on the socket centering section (11), and the bending centering concave surface (111) is a spherical concave surface or an ellipsoidal concave surface;

the socket pipe body (2) can be inserted into the socket pipe body from the right port of the socket pipe body (1), a socket centering section (21), a socket connecting section (22) and a socket matching section (23) are 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), the socket matching section (23) and the socket matching section (13) are mutually attached, and a bending centering convex surface (211) attached to the bending centering concave surface (111) is arranged on the socket centering section (21);

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).

2. The sealed type pipe socket structure according to claim 1,

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.

3. The sealed pipe socket structure according to claim 1, wherein when the concave centering surface (111) is an ellipsoidal concave surface, an ellipsoid is defined, and the ratio of the minor diameter to the major diameter of the ellipsoid is 0.9 to 1.

4. The sealed type pipe socket structure according to claim 1, wherein the socket centering section (11), the socket connection section (12), and the socket fitting section (13) are sequentially arranged in order from right to left, and the spigot centering section (21), the spigot connection section (22), and the spigot fitting section (23) are sequentially arranged in order from right to left.

5. The sealed pipe socket structure according to claim 4, wherein the bending centering concave surface (111) is a spherical concave surface, the socket body (1) is provided with a limiting step, the step surface (400) of the limiting step is a spherical concave surface concentric with the bending centering concave surface (111), and the left end surface (25) of the socket body (2) is an arc convex surface fitted with the step surface (400).

6. The sealed pipe socket structure according to claim 1, wherein said connection structure comprises a plurality of annular grooves (100) provided in said socket connection section (12) and a plurality of annular projections (200) provided in said spigot connection section (22), each annular projection (200) being engaged in one of the annular grooves (100).

7. The sealed type pipe socket structure according to claim 6, wherein the tooth shape of the annular projection (200) is a triangular shape, a trapezoidal shape, or a circular arc projection shape.

8. The sealed-type pipe socket structure according to claim 1, wherein the connection structure comprises an internal thread (121) provided to the socket connection section (12) and an external thread (221) provided to the spigot connection section (22), the internal thread (121) being engaged with the external thread (221).

9. The sealed type pipe socket structure according to claim 8, wherein the thread shape of the external thread (221) is a triangular shape, a trapezoidal shape, or a circular arc convex shape.

10. The sealed pipe socket structure according to claim 1, wherein a socket step (24) is provided on the socket body (2), and a gasket (300) is provided between the socket step (24) and the right end surface of the socket body (1).

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