CN112944082B

CN112944082B - PE steel band helical bellows connection structure

Info

Publication number: CN112944082B
Application number: CN202110264880.3A
Authority: CN
Inventors: 粟明浩; 魏磊; 邓勇
Original assignee: SICHUAN TAIXIN INDUSTRIAL DEVELOPMENT CO LTD
Current assignee: SICHUAN TAIXIN INDUSTRIAL DEVELOPMENT CO LTD
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2023-02-17
Anticipated expiration: 2041-03-11
Also published as: CN112944082A

Abstract

The invention provides a PE steel strip spiral corrugated pipe connecting structure which comprises a pipeline A and a pipeline B, wherein the end parts of the pipeline A and the pipeline B are step fractures, and the pipeline A and the pipeline B are in butt joint through the step fractures to form a butt joint part; the periphery of the butt joint part is covered with a sealing connection layer, and the sealing connection layer is tightly connected with the outer surfaces of the pipeline A and the pipeline B; the clamp component comprises a plurality of arc-shaped clamp pieces which are connected in a matched mode, arc-shaped clamps which are parallel and coaxially arranged are arranged at two ends of each arc-shaped clamp piece, and the two arc-shaped clamps are connected through a spiral arc steel belt; the plurality of arc hoop pieces are correspondingly hooped outside the sealing connecting layer, the end parts of the arc clamps are correspondingly fastened and connected through bolts, the plurality of arc clamps are connected into a ring, and the spiral arc steel band is attached to the outer surface of the sealing connecting layer to play a role in connection and support. The connecting structure can well meet the flexibility and the ring rigidity of the PE steel belt spiral corrugated pipe, and is stable in connecting structure, good in sealing performance and long in service life.

Description

PE steel band helical bellows connection structure

Technical Field

The invention relates to the technical field of installation of PE steel belt spiral corrugated pipes, in particular to a connection structure of a PE steel belt spiral corrugated pipe.

Background

The PE steel belt spiral corrugated pipe is a wall pipe formed by melting, compounding and winding high-density Polyethylene (PE) and steel belts. The pipe wall usually comprises a three-layer structure, wherein the inner layer is based on high-density polyethylene, the middle part is spirally wound by a high-strength steel belt to form a reinforcement, and the outer layer is formed by fusing the high-density polyethylene and the steel belt into a whole by adopting a composite process to form the PE steel belt spiral corrugated pipe.

The PE steel belt spiral corrugated pipe has the flexibility of a plastic pipe and the ring rigidity of a metal pipe, and is widely applied to the fields of municipal drainage and pollution discharge, agricultural irrigation, coal mine ventilation, chemical engineering, communication cable sheaths and the like. PE steel band helical bellows is in the installation use, often relates to the sealing connection between the pipeline, and at present, PE steel band helical bellows's connected mode mainly has: the hot-melting sealing ring is connected with the hot-melting belt through a hot-melting sleeve, the hot-melting extrusion welding connection, the socket type sealing ring connection, the clamp connection and the like. The existing connection mode has the following problems: (1) The flexible connection is adopted, such as electric hot melt belt connection, thermal contraction sleeve connection and the like, the joint of the connection mode meets the requirement of the PE steel belt spiral corrugated pipe on flexibility, the sealing performance is good, but the problem of insufficient ring rigidity exists, so that the stability of the joint is poor, the bearing/supporting capacity is lower than that of the original corrugated pipe section, and the risk of easy damage and leakage exists; (2) Adopt rigid connection, like clamp connection etc. the joint department of this type of connected mode satisfies PE steel band helical bellows to the requirement of ring rigidity, and the bearing capacity is stronger, but has the not enough and poor problem of leakproofness of pliability, can influence the flexible and bending property of bellows to a certain extent. Therefore, in order to improve the performance of the connection part of the PE steel band spiral corrugated pipe, it is urgently needed to develop a new connection mode of the PE steel band spiral corrugated pipe.

Disclosure of Invention

The invention aims to solve the technical problems and the defects and provides a PE steel belt spiral corrugated pipe connecting structure which can well meet the flexibility and the ring rigidity of the PE steel belt spiral corrugated pipe, and is stable in connecting structure, good in sealing performance and long in service life.

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

a PE steel strip spiral corrugated pipe connecting structure comprises a pipeline A and a pipeline B, wherein the end parts of the pipeline A and the pipeline B are step fractures, and the pipeline A and the pipeline B are in butt joint through the step fractures to form a butt joint part; the periphery of the butt joint part is covered with a sealing connection layer, and the sealing connection layer is tightly connected with the outer surfaces of the pipeline A and the pipeline B; the clamp component comprises a plurality of arc-shaped hoop members which are connected in a matched mode, arc-shaped clamps which are parallel and coaxially arranged are arranged at two ends of each arc-shaped hoop member, and the two arc-shaped clamps are connected through a spiral arc steel belt; it is a plurality of arc hoop spare corresponds to hoop and locates outside the sealing connection layer, wherein the arc presss from both sides the tip and corresponds through bolt-up connection, and is a plurality of the arc presss from both sides the link ring, the spiral arc steel band laminate in sealing connection layer surface plays the joint support effect.

Optionally, the bail assembly includes 2 arcuate bail members, the arcuate clamps being semi-circular rings.

Optionally, the sealing device further comprises an elastic cushion layer, wherein a mounting groove is formed in the inner side of the arc-shaped clamp, and the elastic cushion layer is embedded in the mounting groove and located between the arc-shaped clamp and the sealing connection layer.

Optionally, the elastic cushion layer is made of a foamed rubber material.

Optionally, the pipeline a and the pipeline B each include a PE base layer, a spiral steel belt layer, and a PE coating layer disposed from inside to outside, the steel belt end face of the spiral steel belt layer is in a flaring U-shaped structure, and a plurality of tooth ribs are uniformly distributed on the outer surface of the steel belt.

Optionally, the sealing connection layer is of a ring sleeve structure and made of a rubber material, and the tightening sleeve is arranged outside the abutting part.

Optionally, the sealing connection layer is a film sleeve made of PE material, sleeved outside the butt joint portion, heated, shrunk, and tightly wrapped outside the PE cladding layer.

Optionally, the butt seams of the ends of the pipe a and the pipe B are connected by melting and sealing the PE material.

Optionally, the arc clamps at the two ends of the arc hoop member are respectively clamped at the two sides of the butted step fracture, and the length of the sealing connection layer is greater than that of the arc hoop member.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the PE steel strip spiral corrugated pipe connecting structure, the end parts of the pipeline A and the pipeline B are provided with the step fractures, so that the structure of the spiral corrugated pipe is more suitable, the fractures are easier to cut and level, the two pipelines are better butted and closed through the step fractures, and the installation and the laying of the pipelines are facilitated; a sealing connection layer is arranged outside a butt joint part formed by butt joint of the step fracture, so that flexible sealing connection is realized at the pipeline joint; and clamping a hoop component outside the sealing connection layer, tightly connecting the sealing connection layer with the pipeline A and the pipeline B through the arc clamps, attaching the spiral arc steel strip outside the sealing connection layer and connecting the spiral arc steel strip to the arc clamps on two sides of the butt joint part of the step fracture to play a role in rigid connection and support, wherein the spiral arc steel strip has a similar function with the spiral steel strip in the corrugated pipe, and the ring rigidity and the flexibility of the connection structure are ensured.

2. The elastic cushion layer is arranged on the inner side of the arc clamp, so that the arc clamp is more suitable for the shapes of the surface of the pipeline and the sealing connection layer, unevenness and ellipticity are compensated, a filling effect is achieved, and the clamping force of the arc clamp is uniformly transmitted to the sealing connection layer and the pipeline.

3. The steel band surface in the pipeline is equipped with a plurality of tooth muscle, increases the area of contact of steel band and PE coating, makes steel band and PE coating combined connection inseparabler firm, and then makes the structural integrity of pipeline pipe wall better, and is more stable.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a step fracture butt joint structure of a pipeline a and a pipeline B.

Fig. 2 is a schematic view of the connection structure of the PE steel band helical bellows of the present invention.

Fig. 3 is a front view of the clip assembly of the present invention.

Fig. 4 is a top view of the clip assembly of the present invention.

Fig. 5 is a schematic view of a clip assembly according to the present invention.

FIG. 6 is a schematic sectional view of the connection structure of the present invention.

Fig. 7 is an enlarged structural view of a portion a of fig. 6 according to the present invention.

Reference numerals:

10. a step fracture; 11. a pipeline A; 12. a pipeline B; 2. sealing the connecting layer; 3. a clamp assembly; 31. an arc-shaped clamp; 311. mounting grooves; 32. a spiral arc steel strip; 33. an elastic cushion layer; 41. a PE base layer; 42. a spiral steel belt layer; 43. a PE coating layer; 5. a steel belt; 51. and (5) a toothed rib.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, or the orientations and positional relationships that the products of the present invention conventionally place when in use, or the orientations and positional relationships that are conventionally understood by those skilled in the art, are used for convenience in describing and simplifying the present invention, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected or detachably connected or integrated; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 7, an embodiment of the present invention provides a connection structure of a PE steel-band helical bellows, which is suitable for connection and installation of the steel-band helical bellows. The connection structure comprises a pipeline A11, a pipeline B12, a sealing connection layer 2, a hoop component 3 and the like.

As shown in fig. 1, 2 and 6, the pipe a 11 and the pipe B12 are each a PE steel strip spiral corrugated pipe, the ends of which are adapted to be butted. The end parts of the pipeline A11 and the pipeline B12 are both step fractures 10, the step fractures 10 can be two-stage or multi-stage steps, step surfaces (namely cross sections) of the step fractures are parallel to step surfaces, the step surfaces are perpendicular to longitudinal sections, the fracture surfaces are flat, and the end parts of any two pipelines can be in butt joint in a matching mode. The step fracture 10 is set to be well adaptive to the structure of the steel strip spiral corrugated pipe, the step surface of the step fracture is positioned between spiral sections for cutting, and the longitudinal section cuts off the end surface of the steel strip spiral, so that the fracture can be cut and butted more easily.

The step fracture 10 of pipeline A11 and pipeline B12 is adapted and butted to form a butt joint portion, the periphery of the butt joint portion is coated with a sealing connection layer 2, the sealing connection layer 2 completely covers the butt joint portion and is tightly connected with the outer surfaces of pipeline A11 and pipeline B12, and the pipeline A11 and pipeline B12 are connected in a sealing mode.

As shown in fig. 2 to 5, the band assembly 3 includes a plurality of arc-shaped band members connected in a fitting manner, the two ends of the arc-shaped band member are provided with arc-shaped clamps 31, the arc-shaped clamps 31 at the two ends are coaxially and parallelly disposed, the two arc-shaped clamps 31 are connected through a spiral arc steel band 32, the spiral arc steel band 32 is coaxially disposed with the arc-shaped clamps 31 at the two ends, and the arc-shaped clamps 31 and the spiral arc steel band 32 are located on the same column-shaped arc surface. The plurality of arc-shaped hoop members are correspondingly hooped outside the sealing connecting layer 2, wherein the end parts of the plurality of arc-shaped clamps 31 are correspondingly fastened and connected through bolts in sequence, the plurality of arc-shaped clamps 31 are connected into a ring shape, and the sealing connecting layer 2 is hooped with the pipeline A11 or the pipeline B12. The spiral arc steel belt 32 is attached to the outer surface of the sealing connection layer 2 and plays a role in connection and support. Although the arc-shaped clamp 31 of the hoop component 3 is rigidly clamped, the clamping position is small, and the influence on the expansion, bending and flexibility of the pipeline is small; the spiral arc steel strip 32 has a connecting and supporting function, and has certain flexibility, bending and flexibility. Therefore, the hoop component 3 is designed to enhance the rigidity of the connecting structure, so that the connection is more stable and firm, the flexibility of the corrugated pipe is kept, the performance of the connecting part of the pipeline is similar to that of the pipe body, and the hoop component is more suitable for actual engineering installation and use.

In one embodiment, as shown in fig. 3 to 5, the band assembly 3 is composed of 2 arc-shaped band members, and has a cylindrical structure. Wherein, every arc clamp 31 is the semicircle ring structure, and 2 arc hoop parts correspond through bolt fastening connection outside sealing connection layer 2, hoop locate the pipeline, suit with the pipe diameter. Obviously, the hoop assembly 3 may also be composed of 3, 4 or more identical arc-shaped hoop members, and finally connected into a cylindrical hoop assembly 3 corresponding to the pipe diameter; however, the number of the band assemblies 3 should not be too large to ensure a large spiral arc of the spiral arc steel band 32.

As shown in fig. 5 to 7, an elastic cushion 33 is further provided inside the arc clip 31. Specifically, the inner side of the arc clamp 31 is provided with a mounting groove 311 along the circumferential direction, the elastic cushion 33 is embedded in the mounting groove 311 and is fixedly connected with the arc clamp 31, and when the arc clamp 31 is clamped on a pipeline, the elastic cushion 33 is positioned between the arc clamp 31 and the sealing connection layer 2. Set up elastic cushion layer 33 and make arc clamp 31 more adapt to the shape on pipeline surface and sealing connection layer 2, compensate pipeline surface's unevenness and ovality, play the filling effect, make arc clamp 31's clamping-force evenly transmit to sealing connection layer 2 and pipeline on, avoid the atress inequality to cause sealing connection layer 2, pipeline and arc to press from both sides 31 wearing and tearing. The elastic cushion 33 can be made of a foamed rubber material, and has the characteristics of small density, light weight, large impact resistance elasticity and the like.

As shown in fig. 6 and 7, each of the pipes a 11 and B12 is a PE steel strip spiral corrugated pipe, and has a structure including a PE base layer 41, a spiral steel strip layer 42, and a PE cover layer 43 disposed from inside to outside. The PE base layer 41 is made of high-density polyethylene material, and the inner wall is smooth; the spiral steel belt layer 42 is spirally and uniformly wound outside the PE base layer 41 by the steel belt 5 to play a role in reinforcing and supporting; the PE coating layer 43 is coated outside the spiral steel belt layer 42 by adopting a high-density polyethylene material and is in composite connection with the steel belt 5 of the spiral steel belt layer 42. Wherein, steel band 5's transversal flaring U type structure of personally submitting, the opening side laminating is in PE basic unit 41 surface, and form spiral chamber way between the PE basic unit 41, evenly distributed is equipped with a plurality of outstanding tooth muscle 51 on steel band 5's the surface, tooth muscle 51 extends in PE coating 43, can effectively increase steel band 5 and PE coating 43's area of contact, it is inseparabler firm to make steel band 5 and PE coating 43 compound connection, and then the structural integrity that makes the pipeline pipe wall is better, and is more stable. In addition, the steel strip 5 and the PE base layer 41 can be bonded through bonding materials, and the U-shaped flaring structure can effectively increase the contact and bonding area and increase the connection stability of the steel strip 5 and the PE base layer 41.

In one embodiment, the sealing connection layer 2 is a ring sleeve structure matched with the size of the pipeline a 11 and the pipeline B12, is made of a rubber material, has a certain contractibility, and is tightly sleeved outside the butt joint portion of the pipeline a 11 and the pipeline B12 to completely cover and wrap the butt joint portion, so that the sealing connection is realized. The annular sealing connection layer 2 is matched with a butt joint part formed by butt joint of the step fracture 10, so that the connection part can be axially extended, the connection structure is more stable, and the performance of the corrugated pipe is better maintained.

In another embodiment, the sealing connection layer 2 is a film sleeve made of Polyethylene (PE) material, and is sleeved outside the butt joint portion of the pipeline a 11 and the pipeline B12, and the film sleeve is heated and then uniformly shrunk along the pipe diameter to tightly cover the PE coating layer 43 of the pipeline, so as to realize the sealing connection of the pipeline.

In one embodiment, the butt seam formed by the butt joint of the end stepped fracture 10 of the pipe a 11 and the pipe B12 may be formed by fusing a PE material having the same material as the PE base layer 41 and the PE clad layer 43 to be hermetically connected, so as to be fused and connected with the pipe walls at both ends of the butt seam as a whole. Then, the sealing connection layer 2 is covered to play a role of double sealing, so that leakage caused by untight sealing is effectively prevented.

In this connection structure, the arc clamps 31 at the two ends of the arc hoop should be clamped to the two sides of the butted step fracture 10, respectively, and the length of the sealing connection layer 2 should be greater than that of the arc hoop. Namely, the arc clamps 31 at the two ends of the arc hoop are respectively clamped on the pipeline A11 and the pipeline B12, so that the connection effect of the spiral arc steel belt 32 and the sealing connection layer 2 on the pipeline A11 and the pipeline B12 is realized.

In conclusion, the end parts of the pipeline A11 and the pipeline B12 of the PE steel strip spiral corrugated pipe connecting structure are provided with the step fracture 10, the PE steel strip spiral corrugated pipe connecting structure is more suitable for the structure of a spiral corrugated pipe, the fracture is easier to cut and smooth, the two pipelines are better butted and closed through the step fracture 10, and the installation and the laying of the pipelines are facilitated; a sealing connection layer 2 is arranged outside a butt joint part formed by butt joint of the step fracture 10, so that flexible sealing connection is realized at a pipeline joint; and then the clamp assembly 3 is clamped outside the sealing connection layer 2, the sealing connection layer 2 is tightly connected with the pipeline A11 and the pipeline B12 through the arc clamps 31, the spiral arc steel strip 32 is attached outside the sealing connection layer 2 and is connected to the arc clamps 31 on two sides of the butt joint part of the step fracture 10 to play a role in rigid connection and support, and the spiral arc steel strip 32 and the spiral steel strip 32 in the corrugated pipe have similar functions to ensure the ring rigidity and flexibility of the connection structure.

Claims

1. A PE steel belt spiral corrugated pipe connecting structure is characterized by comprising a pipeline A (11) and a pipeline B (12), wherein the pipeline A (11) and the pipeline B (12) respectively comprise a PE base layer (41), a spiral steel belt layer (42) and a PE coating layer (43) which are arranged from inside to outside, the end face of a steel belt (5) of the spiral steel belt layer (42) is of a flaring U-shaped structure, and a plurality of tooth ribs (51) are uniformly distributed on the outer surface of the steel belt (5); the end parts of the pipeline A (11) and the pipeline B (12) are both step fractures (10), step surfaces of the step fractures (10) are located between the spiral sections, longitudinal sections of the step fractures (10) cut off the spiral end surfaces of the steel strip (5), and the pipeline A (11) and the pipeline B (12) are in butt joint through the step fractures (10) in a matched mode to form a butt joint part; the periphery of the butt joint part is covered with a sealing connection layer (2), and the sealing connection layer (2) is tightly connected with the outer surfaces of the pipeline A (11) and the pipeline B (12); the clamp component (3) comprises a plurality of arc-shaped clamp pieces which are connected in a matched mode, arc-shaped clamps (31) which are parallel and coaxially arranged are arranged at two ends of each arc-shaped clamp piece, and the two arc-shaped clamps (31) are connected through spiral arc steel belts (32); the arc hoop pieces are correspondingly hooped outside the sealing connection layer (2), the end parts of the arc clamps (31) are correspondingly fastened and connected through bolts, the arc clamps (31) are connected into a ring, a mounting groove (311) is formed in the inner side of each arc clamp (31), an elastic cushion layer (33) is embedded in the mounting groove (311), the elastic cushion layer (33) is located between each arc clamp (31) and the sealing connection layer (2), and the spiral arc steel belt (32) is attached to the outer surface of the sealing connection layer (2) to play a role in connection and support.

2. A PE steel band spiral bellows connection according to claim 1, wherein the yoke assembly (3) comprises 2 arc-shaped yoke members, and the arc-shaped clips (31) are semicircular rings.

3. A PE steel band helical bellows connecting structure according to claim 1 or 2, wherein the elastic cushion layer (33) is made of a foamed rubber material.

4. A connection structure of PE steel band spiral corrugated pipe as claimed in claim 1, characterized by that the sealing connection layer (2) is a ring sleeve structure made of rubber material tightly sleeved outside the butt connection part.

5. The PE steel strip spiral corrugated pipe connecting structure as claimed in claim 1, wherein the sealing connecting layer (2) is a film sleeve made of PE material, sleeved outside the butt joint portion, heated and shrunk, and tightly coated outside the PE coating layer (43).

6. A PE steel band helical bellows joint structure according to claim 1, wherein the butt joint gaps at the ends of the pipe a (11) and the pipe B (12) are sealingly joined by melting of PE material.

7. The PE steel strip spiral corrugated pipe connecting structure according to claim 1, wherein the arc-shaped clamps (31) at the two ends of the arc-shaped hoop member are respectively clamped at the two sides of the butted step fracture (10), and the length of the sealing connecting layer (2) is greater than that of the arc-shaped hoop member.