Steel jacket steel out-of-ground elbow

Abstract

The utility model provides a steel-in-steel ground bend which comprises an outer steel pipe, an inner steel pipe is arranged in the outer steel pipe, a heat preservation interlayer is arranged between the outer surface of the inner steel pipe and the inner surface of the outer steel pipe, symmetrically-distributed positioning grooves are formed in the two ends of the outer steel pipe, and symmetrically-distributed annular supporting pieces are arranged on the inner steel pipe in a sleeving mode. The annular supporting piece comprises a first connecting ring, a second connecting ring and a plurality of connecting columns located between the first connecting ring and the second connecting ring, positioning blocks which are symmetrically distributed are fixedly connected to the second connecting ring, and the second connecting ring is attached to the inner wall of the outer steel pipe; compared with traditional steel bar connection, by arranging the annular supporting piece, the supporting stability can be greatly improved, deformation can be better resisted, the supporting strength is higher, meanwhile, the heat preservation interlayer can achieve a good heat preservation effect on a medium conveyed by the inner steel pipe, noise generated when the medium is conveyed is reduced to a certain degree, and medium conveying is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline engineering, in particular to a steel-in-steel ground elbow. Background Art

[0002] The steel-in-steel ground elbow is a pipe fitting used in specific projects. This elbow is usually composed of an inner working steel pipe and an outer protective steel pipe. The inner working steel pipe is responsible for conveying media such as steam, while the outer protective steel pipe plays a role in protecting the inner pipe, keeping it warm and waterproofing. A barrier layer is provided between the inner and outer steel pipes for keeping the media warm. However, the existing technology has the following shortcomings when used:

[0003] The inner steel pipe is often welded to the inner wall of the outer steel pipe through several steel bars, so that the inner steel pipe is stably located inside the outer steel pipe. However, the connection support effect achieved by only a few steel bars is not ideal. If subjected to external force, the steel bars may deform, affecting the actual connection effect.

[0004] Therefore, a steel-in-steel ground elbow is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to address the problem that the inner steel pipe is often welded to the inner wall of the outer steel pipe through several steel bars, so that the inner steel pipe is stably located inside the outer steel pipe. However, the connection and support effect achieved by only several steel bars is not ideal. If subjected to external forces, the steel bars may be deformed, affecting the actual connection effect.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A steel-in-steel ground elbow is provided to improve the above problems.

[0008] The specific application is as follows:

[0009] A steel-in-steel ground elbow comprises an outer steel pipe, an inner steel pipe is arranged inside the outer steel pipe, an insulation layer is arranged between the outer surface of the inner steel pipe and the inner surface of the outer steel pipe, both ends of the outer steel pipe are provided with symmetrically distributed positioning grooves, the inner steel pipe is sleeved with symmetrically distributed annular supports, the annular supports comprise a first connecting ring, a second connecting ring and several connecting columns located between the first connecting ring and the second connecting ring, the second connecting ring is fixedly connected to a symmetrically distributed positioning block, and the second connecting ring is in contact with the inner wall of the outer steel pipe.

[0010] As a preferred technical solution of the present application, the thermal insulation layer includes an aluminum silicate fiber layer, a glass wool layer and a rock wool layer arranged in sequence from the inside to the outside.

[0011] As a preferred technical solution of the present application, the thermal insulation layer is fixedly sleeved on the outer surface of the inner steel pipe, the end side of the thermal insulation layer is welded to the inner wall of the outer steel pipe, and the second connecting ring is fitted with the end face of the thermal insulation layer.

[0012] As a preferred technical solution of the present application, the first connecting ring is sleeved on the inner steel pipe.

[0013] As a preferred technical solution of the present application, both ends of the connecting column are welded to the first connecting ring and the second connecting ring respectively, and the second connecting ring is welded to the outer steel pipe.

[0014] As a preferred technical solution of the present application, the four positioning blocks are respectively clamped in the four positioning grooves.

[0015] As a preferred technical solution of the present application, the outer steel pipe and the inner steel pipe are both arc-shaped elbow pipes.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the scheme of this application:

[0018] 1. The two annular support members are sleeved on the inner steel pipe, and the positioning block is clamped in the positioning groove, so that the two second connecting rings are in contact with the inner wall of the outer steel pipe. At this time, the annular support members are preliminarily positioned, and then the two annular support members are welded to the inner wall of the outer steel pipe. The second connecting ring is annular. When subjected to an applied force, it can be more evenly stressed and stably support the outer steel pipe from all directions. With the combination of multiple connecting columns, the supporting strength of the second connecting ring can be improved. When the applied force is transmitted to the inner steel pipe through the connecting column, the applied force can be evenly dispersed through the first connecting ring to avoid deformation of the inner steel pipe. Compared with the traditional steel bar connection, the annular support members can greatly improve the support stability, better resist deformation, and have higher support strength. This solves the problem that in the prior art, the inner steel pipe is often welded to the inner wall of the outer steel pipe through several steel bars, so that the inner steel pipe is stably located in the outer steel pipe. However, the connection support effect achieved by only a few steel bars is not ideal. If subjected to external force, the steel bars may deform, affecting the actual connection effect.

[0019] 2. The thermal insulation layer can provide a good thermal insulation effect on the medium transported by the inner steel pipe and reduce the noise generated during the medium transportation to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a steel-in-steel ground elbow provided in this application.

[0021] Figure 2This is a schematic diagram of the connection structure between the annular support and the positioning block in a steel-in-steel ground elbow provided in this application.

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the thermal insulation layer in a steel-in-steel ground elbow provided in this application.

[0023] Figure 4 This is a schematic structural diagram of the outer and inner steel pipes of a steel-in-steel ground elbow provided in this application.

[0024] Indicated in the figure:

[0025] 1. Outer steel pipe; 2. Inner steel pipe; 3. Thermal insulation layer; 4. Positioning groove; 5. Annular support; 6. First connecting ring; 7. Second connecting ring; 8. Connecting column; 9. Positioning block; 10. Aluminum silicate fiber layer; 11. Glass wool layer; 12. Rock wool layer. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0027] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of this utility model, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art. Such terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" and the like are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0031] like Figure 1-4 As shown, a steel-in-steel ground elbow proposed in this embodiment includes an outer steel pipe 1, an inner steel pipe 2 is arranged inside the outer steel pipe 1, an insulation layer 3 is arranged between the outer surface of the inner steel pipe 2 and the inner surface of the outer steel pipe 1, and symmetrically distributed positioning grooves 4 are opened at both ends of the outer steel pipe 1. A symmetrically distributed annular support 5 is sleeved on the inner steel pipe 2. The annular support 5 includes a first connecting ring 6, a second connecting ring 7 and a plurality of connecting columns 8 located between the first connecting ring 6 and the second connecting ring 7. The second connecting ring 7 can be more evenly stressed from all directions. To provide stable support for the outer steel pipe 1, the second connecting ring 7 is fixedly connected with symmetrically distributed positioning blocks 9, and the second connecting ring 7 fits against the inner wall of the outer steel pipe 1. Cooperating with multiple connecting columns 8, the supporting strength of the second connecting ring 7 can be improved. When the force is transmitted to the inner steel pipe 2 through the connecting columns 8, the force can be evenly dispersed through the first connecting ring 6 to avoid deformation of the inner steel pipe 2. Compared with the traditional steel bar connection, the annular support 5 can greatly improve the support stability, have better resistance to deformation, and have higher support strength.

[0032] like Figure 3 As shown, the thermal insulation layer 3 includes an aluminum silicate fiber layer 10, a glass wool layer 11 and a rock wool layer 12, which are arranged in sequence from the inside to the outside. The aluminum silicate fiber layer 10 has good high temperature resistance and can maintain stable thermal insulation performance at higher temperatures. The glass wool layer 11 has good thermal insulation and sound absorption effects. The rock wool layer 12 has a low thermal conductivity coefficient, which can effectively reduce heat loss. It also has a certain compressive strength, which is conducive to medium transportation.

[0033] like Figure 1 As shown, the thermal insulation layer 3 is fixedly sleeved on the outer surface of the inner steel pipe 2 , the end side of the thermal insulation layer 3 is welded to the inner wall of the outer steel pipe 1 , and the second connecting ring 7 is in contact with the end face of the thermal insulation layer 3 .

[0034] like Figure 1As shown, the first connecting ring 6 is sleeved on the inner steel pipe 2. When the force is transmitted to the inner steel pipe 2 through the connecting column 8, the force can be evenly dispersed through the first connecting ring 6 to avoid deformation of the inner steel pipe 2.

[0035] like Figure 2 As shown, the two ends of the connecting column 8 are welded to the first connecting ring 6 and the second connecting ring 7 respectively, and the second connecting ring 7 is welded to the outer steel pipe 1. By combining multiple connecting columns 8, the supporting strength of the second connecting ring 7 can be improved.

[0036] like Figure 1 As shown, four positioning blocks 9 are respectively clamped in the four positioning grooves 4 to position the annular support member 5.

[0037] like Figure 1 As shown, the outer steel pipe 1 and the inner steel pipe 2 are both arc-shaped elbow pipes, which can better withstand the pressure of the medium inside the inner steel pipe 2 and the external mechanical stress, and have better strength and stability.

[0038] Specifically, when the steel-in-steel ground elbow is in use: the two annular support members 5 are sleeved on the inner steel pipe 2, and the positioning block 9 is clamped in the positioning groove 4, so that the two second connecting rings 7 are in contact with the inner wall of the outer steel pipe 1. At this time, the annular support members 5 are preliminarily positioned, and then the two annular support members 5 are welded to the inner wall of the outer steel pipe 1. The second connecting ring 7 is annular. When the part of the outer steel pipe 1 exposed to the ground is subjected to a force, it can be more evenly stressed and stably support the outer steel pipe 1 from all directions. In combination with multiple connecting columns 8, the supporting strength of the second connecting ring 7 can be improved. When the force is applied, When the force is transmitted to the inner steel pipe 2 through the connecting column 8, the first connecting ring 6 can evenly disperse the force to avoid deformation of the inner steel pipe 2. Compared with the traditional steel bar connection, the annular support 5 can greatly improve the support stability, have better resistance to deformation, and have higher support strength. At the same time, the aluminum silicate fiber layer 10 has good high temperature resistance and can maintain stable thermal insulation performance at higher temperatures. The glass wool layer 11 has good thermal insulation and sound absorption effects. The rock wool layer 12 has a low thermal conductivity coefficient, which can effectively reduce heat loss. It also has a certain compressive strength, which is beneficial to medium transportation.

[0039] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A steel-in-steel ground elbow, comprising an outer steel pipe (1), characterized in that: An inner steel pipe (2) is provided inside the outer steel pipe (1), a heat-insulating layer (3) is provided between the outer surface of the inner steel pipe (2) and the inner surface of the outer steel pipe (1), symmetrically distributed positioning grooves (4) are provided at both ends of the outer steel pipe (1), a symmetrically distributed annular support member (5) is sleeved on the inner steel pipe (2), the annular support member (5) comprises a first connecting ring (6), a second connecting ring (7) and a plurality of connecting columns (8) located between the first connecting ring (6) and the second connecting ring (7), a symmetrically distributed positioning block (9) is fixedly connected to the second connecting ring (7), and the second connecting ring (7) is in contact with the inner wall of the outer steel pipe (1).

2. The steel-in-steel ground elbow according to claim 1, characterized in that: The thermal insulation layer (3) comprises an aluminum silicate fiber layer (10), a glass wool layer (11), and a rock wool layer (12) which are arranged in sequence from the inside to the outside.

3. The steel-in-steel ground elbow according to claim 1, characterized in that: The thermal insulation layer (3) is fixedly sleeved on the outer surface of the inner steel pipe (2), the end side of the thermal insulation layer (3) is welded to the inner wall of the outer steel pipe (1), and the second connecting ring (7) is in contact with the end face of the thermal insulation layer (3).

4. The steel-in-steel ground elbow according to claim 1, characterized in that: The first connecting ring (6) is sleeved on the inner steel pipe (2).

5. The steel-in-steel ground elbow according to claim 1, characterized in that: Both ends of the connecting column (8) are welded to the first connecting ring (6) and the second connecting ring (7), respectively, and the second connecting ring (7) is welded to the outer steel pipe (1).

6. The steel-in-steel ground elbow according to claim 1, characterized in that: The four positioning blocks (9) are respectively clamped in the four positioning slots (4).

7. The steel-in-steel ground elbow according to claim 1, characterized in that: The outer steel pipe (1) and the inner steel pipe (2) are both arc-shaped elbow pipes.

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