A structurally stable double-sleeve elbow

Abstract

The utility model discloses a structurally stable double-sleeve elbow, comprising an outer elbow, an inner elbow, a telescopic connecting pipe head, a supporting ring, a limiting ring, and a telescopic assembly. The utility model makes the inner elbow present an arc-shaped pipe body structure, and the inner elbow can be directly inserted into the outer elbow. A supporting ring is respectively connected to the telescopic connecting pipe heads at both ends of the inner elbow, so that the supporting ring is screwed to the outer threaded ring surface of the telescopic connecting pipe head through the inner threaded ring surface. When the supporting ring rotates inwardly on the telescopic connecting pipe head and abuts against the outer side surface of the limiting ring, positioning is achieved. In this way, the telescopic connecting pipe heads at both ends of the inner elbow are limited, so that the entire inner elbow is positioned, the two supporting rings are mutually restricted, the supporting rings do not need to be welded, and the assembly is convenient and efficient.

Description

Technical Field

[0001] The utility model relates to a structurally stable double-sleeve elbow. Background Art

[0002] At present, in the fluid transportation pipeline technology of the chemical industry, in order to avoid pipeline damage and leakage of fluid in the pipeline to the equipment to cause damage to the generating equipment, double-tube technology is often used. The existing double-tube is often connected by a longitudinal double-tube distributed longitudinally and a transverse double-tube distributed transversely when distributed on site. When the longitudinal double-tube and the transverse double-tube are connected, they are generally connected through a double-tube connecting elbow. The existing double-tube connecting elbow generally has an outer elbow and an inner elbow. The inner elbow is installed inside the outer elbow and fixedly connected through a supporting ring. The outer elbow is generally formed by butt-jointing two butt-joints with arc-shaped cross-sections. At the same time, it needs to be equipped with sealing rings, screws and other components, and the installation is relatively complicated. At the same time, in order to fix the outer elbow and the inner elbow, the ends of the inner elbow and the outer elbow are connected and supported by a supporting ring. Now, the inner side of the supporting ring is generally welded to the outer side of the inner elbow, and the outer side of the supporting ring is welded to the inner side of the outer elbow. This welding assembly method is not only cumbersome to operate, but also prone to cracking and leakage. In addition, when the two ends of the existing double-sleeve connecting elbow are welded to the longitudinal double sleeve and the transverse double sleeve, it is necessary to keep the end faces of the inner pipe and the outer pipe flush, otherwise it will lead to the disadvantages that when the outer pipe is welded, the inner pipe is not welded sufficiently, or when the inner pipe is welded, the outer pipe is not welded sufficiently, which increases the accuracy during assembly and brings inconvenience to the installation operation. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the problem solved by the utility model is: to provide a structurally stable double-sleeve elbow with high assembly efficiency, high structural flexibility and flexible installation.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0005] A structurally stable double-sleeve elbow, comprising an outer elbow, an inner elbow, a telescopic connecting pipe head, a supporting ring, a limiting ring, and a telescopic assembly; the inner elbow is plugged and installed inside the outer elbow; the two ends of the inner elbow are respectively connected to a telescopic connecting pipe head in a floating manner through a telescopic assembly; the outer side of the telescopic connecting pipe head is provided with an external threaded annular surface all around; the inner side of the supporting ring is provided with an internal threaded annular surface all around; a limiting ring is respectively connected to the inner sides of the two ends of the outer elbow; a supporting ring is respectively connected to the telescopic connecting pipe heads at both ends of the inner elbow, the supporting ring is screwed onto the external threaded annular surface of the telescopic connecting pipe head through the internal threaded annular surface, and the supporting ring rotates inward on the telescopic connecting pipe head and abuts against the outer side surface of the limiting ring; the outer elbow and the limiting ring are an integrally formed structure; the inner elbow has an arc-shaped pipe body structure.

[0006] Further, the telescopic assembly includes a sealed telescopic tube, a sleeve spring, and a positioning ring sleeve; the two ends of the inner bend tube are respectively connected to a positioning ring sleeve; the outer end of the positioning ring sleeve is provided with an inner convex edge; the inner end of the telescopic connecting pipe head is provided with an outer convex edge; the inner end of the telescopic connecting pipe head is slidably installed inside the outer end of the positioning ring sleeve; the outer side of the outer convex edge slides and abuts against the inner side wall of the positioning ring sleeve; a sealed telescopic tube is connected between the inner end of the telescopic connecting pipe head and the end of the inner bend tube; a sleeve spring is sleeved on the outer side of the sealed telescopic tube; the two ends of the sleeve spring elastically abut between the inner end of the positioning ring sleeve and the outer end surface of the outer convex edge, and the outer end of the sleeve spring presses the outer convex edge and makes the outer convex edge abut against the inner convex edge; the inner side of the support ring abuts against the inner convex edge.

[0007] Furthermore, the sealed telescopic tube is made of a bellows material; and the inner side surface of the sealed telescopic tube is coated with an anti-corrosion coating.

[0008] Furthermore, the outer sides of the outer convex edge are coated with a wear-resistant coating.

[0009] Furthermore, the outer end of the telescopic connecting pipe head extends to the outside of the outer end of the outer elbow.

[0010] Furthermore, the outer sides of the supporting ring are in contact with the inner sides of the outer elbow.

[0011] Furthermore, a rotating toggle block is provided on the outer side of the support ring.

[0012] Furthermore, a plurality of liquid-conducting grooves are evenly arranged on the outer sides of the supporting ring.

[0013] Furthermore, the outer elbow and the inner elbow are made of PVC material.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model makes the inner bend pipe present an arc-shaped pipe body structure, and the inner bend pipe can be directly inserted into the outer bend, and a supporting ring is respectively connected to the telescopic connecting pipe heads at both ends of the inner bend pipe, so that the supporting ring is screwed to the outer threaded ring surface of the telescopic connecting pipe head through the internal threaded ring surface, and when the supporting ring rotates inward on the telescopic connecting pipe head and abuts against the outer side surface of the limiting ring ring to achieve positioning, the telescopic connecting pipe heads at both ends of the inner bend pipe are limited, so that the entire inner bend pipe is positioned, the two supporting rings are mutually restricted, the supporting rings do not need to be welded, and the assembly is convenient and efficient.

[0016] 2. The utility model floatingly connects a telescopic connecting pipe head at both ends of the inner bend pipe through a telescopic assembly, and the outer convex edge is pressed against the inner convex edge by the sleeve spring. In this way, the telescopic connecting pipe head has space to move toward the inside of the positioning ring sleeve through the sleeve spring, and the outer end of the telescopic connecting pipe head extends to the outside of the outer end of the outer elbow. In this way, when the external longitudinal double sleeve or transverse double sleeve is welded with the telescopic connecting pipe head and the outer elbow, it is sufficient to keep the outer elbow butted with the outer tube of the longitudinal double sleeve or the transverse double sleeve, and the telescopic connecting pipe head will be automatically pressed by the inner tube of the longitudinal double sleeve or the transverse double sleeve to move inward to achieve tight butt welding. In this way, there is no need to require that the outer end surfaces of the telescopic connecting pipe head and the outer elbow must be flush, which reduces the difficulty of assembly and makes assembly more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0018] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of one end.

[0019] Figure 3 It is a structural schematic diagram of the telescopic connecting pipe head, the positioning ring sleeve and the telescopic assembly of the utility model.

[0020] Figure 4 For this utility model Figure 3 Schematic diagram of the structure in which the telescopic connecting pipe head moves toward the inside of the positioning ring sleeve.

[0021] Figure 5 It is a structural schematic diagram of the support ring of the utility model.

[0022] Figure 6 It is a schematic diagram of the split structure of the utility model. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 6As shown, a structurally stable double-sleeve elbow comprises an outer elbow 1, an inner elbow 2, a telescopic connecting pipe head 3, a supporting ring 4, a limiting ring 5, and a telescopic assembly 6; the inner elbow 2 is plugged and installed inside the outer elbow 1; the two ends of the inner elbow 2 are respectively connected to a telescopic connecting pipe head 3 by floating through a telescopic assembly 6; the outer side of the telescopic connecting pipe head 3 is provided with an external threaded annular surface; the inner side of the supporting ring 4 is provided with an internal threaded annular surface; a limiting ring 5 is respectively connected to the inner side of the two ends of the outer elbow 1; a supporting ring 4 is respectively connected to the telescopic connecting pipe heads 3 at the two ends of the inner elbow 2, and the supporting ring 4 is screwed on the external threaded annular surface of the telescopic connecting pipe head 3 through the internal threaded annular surface, and the supporting ring 4 rotates inward on the telescopic connecting pipe head and abuts against the outer side of the limiting ring 5; the outer elbow 1 and the limiting ring 5 are an integrally formed structure; the inner elbow 2 is an arc-shaped pipe body structure.

[0025] like Figures 1 to 6 As shown, in order to facilitate the telescopic movement of the telescopic connecting pipe head 3, it has the function of moving inward. Further, the telescopic assembly 6 includes a sealed telescopic tube 61, a sleeve spring 62, and a positioning ring sleeve 63; the two ends of the inner bend pipe 2 are respectively connected to a positioning ring sleeve 63; the outer end of the positioning ring sleeve 63 is provided with an inner convex edge 631 around the periphery; the inner end of the telescopic connecting pipe head 3 is provided with an outer convex edge 31 around the periphery; the inner end of the telescopic connecting pipe head 3 is slidably installed inside the outer end of the positioning ring sleeve 63; the outer side of the outer convex edge 31 around It slides against the inner wall of the positioning ring sleeve 63; a sealed telescopic tube 61 is connected between the inner end of the telescopic connecting pipe head 3 and the end of the inner bend pipe 2; a sleeve spring 62 is sleeved on the outer side of the sealed telescopic tube 61; both ends of the sleeve spring 62 elastically abut between the inner end of the positioning ring sleeve 63 and the outer end surface of the outer convex edge 31, and the outer end of the sleeve spring 62 presses the outer convex edge 31 and makes the outer convex edge 31 abut on the inner convex edge 631; the inner side of the support ring 4 abuts against the inner convex edge 631.

[0026] like Figures 1 to 6As shown, in order to improve the corrosion resistance and wear resistance, further, the sealed telescopic tube 61 is made of a bellows material; the inner side of the sealed telescopic tube 61 is coated with an anti-corrosion coating. Further, the outer side of the outer flange 31 is coated with a wear-resistant coating. In order to avoid the problem that the telescopic connecting pipe head 61 and the outer elbow 1 are not flush, resulting in uneven welding, further, the outer end of the telescopic connecting pipe head 61 extends to the outer side of the outer end of the outer elbow 1, so that the telescopic connecting pipe head 61 is first docked, then retracted, and finally the outer elbow 1 is welded, which is flexible and convenient to use. Further, the outer side of the support ring 4 is in contact with the inner side of the outer elbow 1. Further, a rotating toggle block 41 is provided on the outer side of the support ring 4. Further, a plurality of liquid guide grooves 42 are evenly opened on the outer side of the support ring 4. Further, the outer elbow 1 and the inner bend 2 are made of PVC material.

[0027] The utility model makes the inner bend pipe 2 present an arc-shaped pipe body structure, and the inner bend pipe 2 can be directly inserted into the outer bend 1, and a supporting ring 4 is respectively connected to the telescopic connecting pipe heads 3 at both ends of the inner bend pipe 2, so that the supporting ring 4 is screwed to the external threaded ring surface of the telescopic connecting pipe head 3 through the internal threaded ring surface, and when the supporting ring 4 rotates inwardly on the telescopic connecting pipe head 3 and abuts against the outer side surface of the limiting ring 5 to achieve positioning, the telescopic connecting pipe heads 3 at both ends of the inner bend pipe 2 are limited, so that the entire inner bend pipe 2 is positioned, the two supporting rings 4 are mutually restricted, the supporting rings 4 do not need to be welded, and the assembly is convenient and efficient.

[0028] The utility model floatingly connects a telescopic connecting pipe head 3 at both ends of the inner bend pipe 2 through a telescopic assembly 6, and the outer convex edge 31 is pressed against the inner convex edge 631 by the sleeve spring 62. In this way, the telescopic connecting pipe head 3 has space to move toward the inside of the positioning ring sleeve 63 through the sleeve spring 62, and the outer end of the telescopic connecting pipe head 3 extends to the outside of the outer end of the outer elbow 1. In this way, when the external longitudinal double sleeve or transverse double sleeve is welded with the telescopic connecting pipe head 3 and the outer elbow 1, as long as the outer elbow 1 is kept docked with the outer tube of the longitudinal double sleeve or the transverse double sleeve, the telescopic connecting pipe head 3 will be automatically pressed by the inner tube of the longitudinal double sleeve or the transverse double sleeve to move inward to achieve tight docking and welding. In this way, there is no need to require that the outer end surfaces of the telescopic connecting pipe head 3 and the outer elbow 1 must be flush, which reduces the difficulty of assembly and makes assembly more flexible and convenient.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structurally stable double-sleeve elbow, characterized in that: It includes an outer elbow, an inner elbow, a telescopic connecting pipe head, a supporting ring, a limiting ring, and a telescopic assembly; the inner elbow is plugged and installed inside the outer elbow; the two ends of the inner elbow are respectively connected to a telescopic connecting pipe head in a floating manner through a telescopic assembly; the outer side of the telescopic connecting pipe head is provided with an external threaded annular surface; the inner side of the supporting ring is provided with an internal threaded annular surface; a limiting ring is respectively connected to the inner side of the two ends of the outer elbow; a supporting ring is respectively connected to the telescopic connecting pipe heads at both ends of the inner elbow, the supporting ring is screwed on the external threaded annular surface of the telescopic connecting pipe head through the internal threaded annular surface, and the supporting ring rotates inward on the telescopic connecting pipe head and abuts against the outer side of the limiting ring; the outer elbow and the limiting ring are an integrally formed structure; the inner elbow has an arc-shaped pipe body structure; the outer end of the telescopic connecting pipe head extends to the outer side of the outer end of the outer elbow; and a plurality of liquid guide grooves are evenly arranged on the outer side of the supporting ring.

2. The structurally stable double-tube elbow according to claim 1, characterized in that: The telescopic assembly includes a sealed telescopic tube, a sleeve spring, and a positioning ring sleeve; the two ends of the inner bend tube are respectively connected to a positioning ring sleeve; the outer end of the positioning ring sleeve is provided with an inner convex edge; the inner end of the telescopic connecting pipe head is provided with an outer convex edge; the inner end of the telescopic connecting pipe head is slidably installed inside the outer end of the positioning ring sleeve; the outer side of the outer convex edge slides against the inner side wall of the positioning ring sleeve; a sealed telescopic tube is connected between the inner end of the telescopic connecting pipe head and the end of the inner bend tube; a sleeve spring is sleeved on the outer side of the sealed telescopic tube; the two ends of the sleeve spring elastically abut between the inner end of the positioning ring sleeve and the outer end surface of the outer convex edge, and the outer end of the sleeve spring presses the outer convex edge and makes the outer convex edge abut on the inner convex edge; the inner side of the support ring abuts against the inner convex edge.

3. The structurally stable double-tube elbow according to claim 2, characterized in that: The sealed telescopic tube is made of a bellows material; the inner side of the sealed telescopic tube is coated with an anti-corrosion coating.

4. The structurally stable double-tube elbow according to claim 2, characterized in that: The outer sides of the outer convex edge are coated with a wear-resistant coating.

5. The structurally stable double-tube elbow according to claim 1, characterized in that: The outer sides of the supporting ring are in contact with the inner sides of the outer elbow.

6. The structurally stable double-tube elbow according to claim 1, characterized in that: A rotating toggle block is arranged on the outer side of the supporting ring.

7. The structurally stable double-tube elbow according to claim 1, characterized in that: The outer elbow and the inner elbow are made of PVC material.

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