Connecting piece for connecting double casing pipes and single pipe

Abstract

The utility model discloses a connecting piece for connecting double sleeves and a single pipe, which is integrally formed and is provided with a large-diameter part and a small-diameter part. The small-diameter part is provided with a first small pipeline connecting area fixedly connected with a first small pipeline, and the large-diameter part is provided with a sleeve connecting area and a second small pipeline connecting area; the sleeve connecting area is an annular groove which is formed in the end face of the large-diameter part and extends in the axial direction, the annular groove is located on the periphery of the second small pipeline connecting area, and the first small pipeline connecting area is communicated with the second small pipeline connecting area. The pipe connector is integrally formed, is used for connection of double sleeves and a single pipe, can be prefabricated in advance and directly installed after arriving at the site, does not need to damage other pipelines, and improves the connection efficiency and the sealing performance of the sleeves; wherein the large-diameter part can realize the connection of the sleeve and a small pipeline, the small-diameter part can realize the connection of the small pipeline, and the two small pipelines are communicated, so that the connection of the sleeve on the communicated small pipeline is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline protection and connection field, specifically is double sleeve pipe connecting piece and outer sleeve pipe. BACKGROUND

[0002] In the construction of industrial plants and similar facilities, the outdoor pipe rack system as a key infrastructure bears the laying needs of various process pipelines. Especially in the chemical, metallurgical and other industries, a large number of corrosive liquids such as acid and alkali need to be transported through overhead pipelines. In order to ensure safety in production and prevent secondary disasters caused by pipeline leakage, the industry generally adopts a double sleeve pipe structure, that is, a larger sleeve pipe is added outside the main pipeline for transporting liquids to form a double protective barrier. However, in actual engineering applications, the connection technology of the double sleeve pipe system still has significant defects, which has become a key bottleneck restricting its protective effectiveness.

[0003] The existing connection scheme of the double sleeve pipe system mostly adopts a simple plug hole process: first, a hole is made at the predetermined position of the sleeve pipe, then the conveying pipeline is passed through the hole, and the plug and the sealant are used for fixation and waterproof treatment. This method can achieve basic connection function, but the hole opening basically depends on manual operation, which is difficult to ensure accurate matching with the outer diameter of the conveying pipeline, resulting in irregular gaps between the hole and the pipeline; the sealing reliability is low: the adhesion of the sealant is relied on to achieve waterproofing, but the sealant is easily aged and failed due to factors such as medium corrosion and temperature cycling in long-term use, forming a leakage channel. UTILITY MODEL CONTENTS

[0004] Therefore, in order to solve the above problems, the utility model provides a connecting piece for connecting double sleeve pipe and single pipe, which realizes quick connection of the sleeve pipe.

[0005] Specifically, a connecting piece for connecting double sleeve pipe and single pipe, the connecting piece is integrally formed and has a large diameter part and a small diameter part;

[0006] The small diameter part has a first small pipeline connecting area fixedly connected with a first small pipeline,

[0007] The large diameter part has a sleeve pipe connecting area and a second small pipeline connecting area;

[0008] The sleeve pipe connecting area is an annular groove extending axially on the end face of the large diameter part, the annular groove is located on the periphery of the second small pipeline connecting area, and the first small pipeline connecting area and the second small pipeline connecting area are communicated.

[0009] Optionally, the first small pipeline connecting area is a first through hole formed in the small diameter part;

[0010] The second small pipeline connecting area is a second through hole formed in the large diameter part;

[0011] The first through hole and the second through hole are coaxially communicated to form a small pipe connecting area.

[0012] Optionally, a convex ring is arranged in the small pipe connecting area, and an inner convex height of the convex ring is less than or equal to a wall thickness of the small pipe.

[0013] Optionally, the convex ring is provided with an axial through slot or / and a through hole.

[0014] Optionally, an outer inner wall surface and an inner bottom surface of the ring groove are attached to the sleeve, and an inner wall of the ring groove has a thickness, and the thickness and a width of the ring groove determine a spacing between the sleeve and the second small pipe.

[0015] The utility model has the advantages of the following:

[0016] The utility model discloses a one-piece connecting piece, which is used for connecting a double sleeve and a single pipe, can be prefabricated, and is directly installed on site without damaging other pipes, thereby improving the connecting efficiency and the sealing performance of the sleeve.

[0017] The large-diameter part is used for connecting the sleeve and a small pipe, and the small-diameter part is used for connecting a small pipe, and the two small pipes are connected, so that the sleeve is connected to the small pipe.

[0018] In order to determine the connecting position of the two small pipes, a convex ring is arranged in the small pipe connecting area, and the convex ring can be used for positioning, and a through hole or a through slot is arranged on the convex ring, so that the connection is more stable and reliable in the process of heat melting or bonding, and the two small pipes are more easily connected. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of a three-dimensional structure of the connecting piece of the utility model;

[0020] Figure 2 is another perspective schematic diagram of the connecting piece of the utility model;

[0021] Figure 3 is a side view schematic diagram of the connecting piece of the utility model;

[0022] Figure 4 is Figure 3 is a sectional view schematic diagram of B-B in the utility model;

[0023] Figure 5is a perspective view of the connection piece in use according to the utility model;

[0024] Figure 6 is a cross-sectional view of the connection piece in use according to the utility model;

[0025] Figure 7 is a perspective view of the convex ring according to the utility model;

[0026] In the figure: 100, large diameter part; 110, large diameter part; 120, small diameter part; 130, small pipe connection area; 140, ring groove; 141, inner bottom; 142, outer inner wall surface; 143, inner wall; 150, convex ring; 151, through hole; 152, through groove; 200, sleeve; 300, second small pipe; 400, first small pipe. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference numbers represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0028] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0029] As described in the background art, the existing double sleeve pipe system connection scheme mostly adopts a simple plug hole process: first, a hole is made at the predetermined position of the sleeve pipe, then the conveying pipe is passed through the hole, and fixed and waterproofed by the plug and sealant. This method can achieve basic connection function, but the hole opening basically depends on manual operation, and it is difficult to ensure accurate matching with the outer diameter of the conveying pipe, resulting in irregular gap between the hole and the pipe; low sealing reliability: the adhesion of the sealant is relied on to achieve waterproofing, but in long-term use, affected by factors such as medium corrosion and temperature cycling, the sealant is prone to aging and failure, forming a leakage channel.

[0030] Based on the above reasons, as shown in Figures 1-6 The present embodiment provides a connection piece 100 for connecting a double sleeve pipe and a single pipe, which has a large diameter part 110 and a small diameter part 120;

[0031] The small-diameter part 120 has a first small-pipe connecting area fixedly connected with the first small pipe 400,

[0032] The large-diameter part 100 has a sleeve connecting area and a second small-pipe connecting area;

[0033] The sleeve connecting area is an annular groove 140 axially extending on the end face of the large-diameter part, which is located at the periphery of the second small-pipe connecting area; the annular groove is used for connecting the sleeve 200, the second small-pipe connecting area is used for connecting the second small pipe 300; the first small-pipe connecting area and the second small-pipe connecting area are in communication. The first small-pipe connecting area is a first through hole opened in the small-diameter part; the second small-pipe connecting area is a second through hole opened in the large-diameter part; the first through hole and the second through hole are coaxially communicated to form a small-pipe connecting area 130.

[0034] The outer and inner wall surfaces 142 and the inner bottom surface 141 of the annular groove are in contact with the sleeve. The inner wall 143 of the annular groove has a thickness, which determines the spacing between the sleeve and the second small pipe together with the width of the annular groove.

[0035] A convex ring 150 is opened in the small-pipe connecting area 130, the inner convex height of the convex ring 150 is less than or equal to the wall thickness of the small pipe; preferably, the convex ring is located at the middle position of the small-pipe connecting area; the convex ring 150 has an axial through groove 152 or / and a through hole 151 (as shown in Figure 7

[0036] In use, as shown in Figure 5 and Figure 6 The first small pipe 400 and the second small pipe 300 are installed in the small-pipe connecting area 130 by a fixed connection mode such as heat melting or adhesion, the first small pipe and the second small pipe are positioned by the convex ring to prevent the first small pipe or the second small pipe from being in unstable connection with the small-pipe connecting area, in the heat melting or adhesion process, the first small pipe and the second small pipe can be connected into one by the through hole or the through groove on the convex ring, so that the connection is more stable and reliable; then the sleeve is installed in the annular groove by heat melting or adhesion, in this process, the sleeve at least has the outer wall surface and the end face in contact with the inner wall of the annular groove; in order to make the sleeve have spacing with the second small pipe (for accommodating the leaked liquid due to the rupture or damage of the small pipe) and realize sleeving, the outer and inner wall surfaces and the inner bottom surface of the annular groove are in contact with the sleeve. The spacing between the sleeve and the small pipe is determined by the thickness of the inner wall of the annular groove and the width of the annular groove.

[0037] ​The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connector for connecting double-sleeve pipes and single-sleeve pipes, characterized in that: It has a large-diameter section and a small-diameter section; The small-diameter section has a first small-diameter pipe connection area that is fixedly connected to the first small-diameter pipe. The large-diameter section has a sleeve connection area and a second small-diameter pipe connection area; The sleeve connection area is an annular groove extending axially from the end face of the large diameter section. The annular groove is located outside the second small pipe connection area, and the first small pipe connection area and the second small pipe connection area are connected.

2. The connector for connecting double-sleeve and single-sleeve pipes according to claim 1, characterized in that: The first small pipe connection area is a first through hole opened in the small diameter section; The second small pipe connection area is a second through hole opened in the large diameter section; The first through hole and the second through hole are coaxially connected to form a small pipe connection area.

3. The connector for connecting double-sleeve and single-sleeve pipes according to claim 2, characterized in that: A convex ring is provided in the connection area of ​​the small pipe, and the inner convex height of the convex ring is less than or equal to the wall thickness of the small pipe.

4. The connector for connecting double-sleeve and single-sleeve pipes according to claim 3, characterized in that: The convex ring has an axial through groove and / or through hole.

5. The connector for connecting double-sleeve and single-sleeve pipes according to claim 1, characterized in that: The outer inner wall and inner bottom surface of the annular groove are in contact with the sleeve.

6. The connector for connecting a double-sleeve pipe and a single pipe according to claim 5, characterized in that: The inner wall of the annular groove has a thickness, which, along with the width of the annular groove, determines the distance between the control sleeve and the second small pipe.

7. A connector for connecting a double-sleeve pipe and a single pipe according to any one of claims 1-6, characterized in that: The connector is molded as a single piece.

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