Thermal insulation corrugated pipe expansion joint

Abstract

The utility model provides a heat preservation corrugated pipe expansion joint which comprises a corrugated pipe, a first heat preservation assembly and a second heat preservation assembly, an air cavity is formed among the corrugated pipe, the first heat preservation assembly and the second heat preservation assembly, and the two ends of the corrugated pipe are connected with a first connecting part and a second connecting part respectively. The two ends of the first heat preservation assembly are connected with the first end and the second end respectively, the first end is fixedly connected with the end, away from the second heat preservation assembly, of the first connecting part, the second heat preservation assembly is connected with the second connecting part, and the second heat preservation assembly is in sliding sealing connection with the second end through the sealing assembly. The first heat preservation assembly is fixedly connected with the first end part, and the other end of the first heat preservation assembly is in sliding connection, so that heat loss of the corrugated pipe expansion joint is reduced; meanwhile, deformation and falling of the heat preservation layer caused by repeated stretching or compression of the heat preservation assembly are prevented, the service life of the heat preservation layer is prolonged, the structure is simple, applicability is high, and the heat preservation assembly can be used in expansion joints of various types.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to an insulation bellows expansion joint. Background Art

[0002] As an important flexible compensation equipment in the pressure pipeline system, the bellows expansion joint can compensate for the thermal deformation and mechanical deformation of the pipeline, which plays a role in reducing pipeline stress and increasing pipeline service life. In high-temperature media, the pipeline has a large thermal expansion, which requires strict flexibility compensation ability of the expansion joint and high thermal insulation performance of the external insulation material of the bellows. In order to minimize the heat loss of the expansion joint, an insulation layer is usually set on the outer surface of the expansion joint, such as Figure 1 shown.

[0003] When the pipeline is started, the high-temperature medium continuously transfers heat to the bellows through heat conduction. The outer surface of the bellows heats up rapidly. Along with the thermal expansion of the pipe system, the bellows produces repeated displacement movements. The insulation layer is prone to fall off and damage under repeated displacement movements, exposing the bellows directly to the external environment. The insulation layer loses its thermal insulation effect, and a large amount of heat from the medium is lost, which fails to achieve energy-saving effects and poses safety hazards such as burns. Utility Model Content

[0004] In view of this, the utility model aims to provide an insulating bellows expansion joint to solve the problem in the prior art that the insulating layer of the bellows expansion joint is prone to fall off and damage when the bellows is repeatedly displaced, causing the insulating layer of the bellows expansion joint to fail.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] An insulated bellows expansion joint comprises a bellows, a first insulation component and a second insulation component, wherein an air cavity is formed between the bellows, the first insulation component and the second insulation component, the two ends of the bellows are respectively connected to a first connection part and a second connection part, the two ends of the first insulation component are respectively connected to a first end part and a second end part, the first end part is fixedly connected to an end of the first connection part away from the second insulation component, the second insulation component is connected to the second connection part, and the second insulation component is slidably and sealedly connected to the second end part via a sealing component.

[0007] This arrangement has a certain heat-insulating effect by arranging a first insulation component and a second insulation component, and then further improves the heat-insulating capacity of the expansion joint through the air cavity formed between the bellows, the first insulation component and the second insulation component; then, by arranging a first connecting part and a second connecting part, the area of ​​the air cavity is increased, and the heat-insulating capacity of the expansion joint is further improved, and then the first insulation component is fixedly connected to the first end, and the other end of the first insulation component is slidably connected through a sealing component, which not only improves the connection firmness of the first insulation component and the second insulation component, but also effectively reduces the convective heat exchange between the annular air cavity and the external environment, and further reduces the heat loss of the bellows expansion joint; at the same time, it prevents the insulation layer from being deformed and falling off due to repeated stretching or compression of the insulation component, thereby extending the service life of the insulation layer. It has a simple structure and strong applicability, and can be used in various types of expansion joints.

[0008] Furthermore, the sealing assembly includes a ferrule, a ferrule fixing ring, a sealing plate, and a bolt, wherein the ferrule is embedded in the second end, the ferrule fixing ring is located on the surface of the second end away from the first end, the sealing plate is in close contact with the ferrule fixing ring, and the sealing plate is slidably connected to the second insulation assembly, and the bolt is inserted into the sealing plate and the ferrule fixing ring in sequence and fixed in the ferrule.

[0009] This arrangement can achieve sliding sealing between the first insulation component and the second insulation component, effectively reducing the convective heat exchange between the air cavity and the external environment, and further reducing the heat loss of the bellows expansion joint; at the same time, it prevents the insulation layer from deforming and falling off due to repeated stretching or compression of the insulation component, thereby extending the service life of the insulation layer. It has a simple structure and strong applicability, and can be used in various types of expansion joints.

[0010] Furthermore, the sealing assembly includes a sealing ring, which is sleeved on the second heat-insulating assembly and is in close contact with the second end.

[0011] This arrangement can effectively reduce the convective heat exchange between the air cavity and the external environment, and further reduce the heat loss of the bellows expansion joint.

[0012] Furthermore, the bellows includes a first bellows unit and a second bellows unit, and the first bellows unit and the second bellows unit are connected via a middle portion.

[0013] Furthermore, the first corrugated unit and the second corrugated unit both include crests, and the distance between the first end and the nearest crest is greater than the distance between the second heat-insulating component and the nearest crest.

[0014] This arrangement increases the area of ​​the air cavity, so that the entire bellows can be effectively insulated and heat loss can be reduced.

[0015] Furthermore, the first thermal insulation component includes an outer protective member, a first thermal insulation layer, and a thermal insulation tube, wherein the first thermal insulation layer is located between the outer protective member and the thermal insulation tube.

[0016] This setting can effectively extend the heat transfer path, increase thermal resistance, and reduce heat loss from the expansion joint.

[0017] Furthermore, the second insulation component includes a left connection part, a right connection part, an upper connection part, and a second insulation layer, the left connection part and the right connection part are both connected to the second connection part, the upper connection part is connected to the sealing component, and the second insulation layer is located in a cavity formed by the left connection part, the right connection part, the upper connection part, and the second connection part.

[0018] Furthermore, the first end portion and the first connecting portion are connected by welding.

[0019] This arrangement improves the connection firmness between the first end portion and the first connecting portion.

[0020] Furthermore, the second thermal insulation component and the second connecting portion are connected by welding.

[0021] This arrangement improves the connection firmness between the second heat-insulating component and the second connecting portion.

[0022] Furthermore, it also includes a flow guide tube, which is connected to the first connecting part.

[0023] Furthermore, the first end and the second end are both ring plate structures.

[0024] Compared with the prior art, the thermal insulation bellows expansion joint described in the utility model has the following advantages:

[0025] 1) The utility model has a certain heat insulation effect by arranging the first heat insulation component and the second heat insulation component, and then further improves the heat insulation capacity of the expansion joint through the air cavity formed between the bellows, the first heat insulation component and the second heat insulation component; and then increases the area of ​​the air cavity by arranging the bellows to connect the first connection part and the second connection part, thereby further improving the heat insulation capacity of the expansion joint;

[0026] 2) The utility model has a first insulation component fixedly connected to the first end, and the other end of the first insulation component is slidably connected, which effectively reduces the convective heat exchange between the annular air cavity and the external environment, and further reduces the heat loss of the bellows expansion joint; at the same time, it prevents the insulation layer from being deformed and falling off due to repeated stretching or compression of the insulation component, and prolongs the service life of the insulation layer. It has a simple structure and strong applicability, and can be used in various types of expansion joints;

[0027] 3) The utility model provides a sealing component to slide and seal the gap between the first insulation component and the second insulation component, thereby effectively reducing the convection heat exchange between the external environment and the annular air cavity and reducing heat loss;

[0028] 4) The bellows expansion joint of the utility model can effectively extend the service life of the insulation layer, while extending the heat transfer path of the expansion joint and increasing the thermal resistance. By reducing the heat loss of the expansion joint, the purpose of high efficiency and energy saving is achieved, and the economic efficiency and safety of the project are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an insulation bellows expansion joint in the prior art;

[0030] Figure 2 It is a structural schematic diagram of the thermal insulation bellows expansion joint of the utility model;

[0031] Figure 3 It is a schematic diagram of the local structure of the thermal insulation bellows expansion joint of the utility model.

[0032] Description of reference numerals:

[0033] 1- bellows; 11- first bellows unit; 12- second bellows unit; 13- first connection part; 14- second connection part; 15- middle part; 2- first insulation component; 21- outer protective member; 22- first insulation layer; 23- insulation tube; 3- first end; 4- second end; 5- second insulation component, 51- left connection part; 52- right connection part; 53- upper connection part; 54- second insulation layer; 6- sealing component; 61- sealing ring; 62- ferrule; 63- ferrule fixing ring; 64- sealing plate; 65- bolt; 7- guide tube; 8- air cavity. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the accompanying drawings. In addition, the directions involved in the following specific embodiments are briefly described: the directions or positional relationships indicated by "up", "down", "left", "right" and the like mentioned in the embodiments refer to the directions or positional relationships shown in the accompanying drawings.

[0035] like Figures 1 to 3As shown, the utility model relates to an insulated bellows expansion joint, comprising a bellows 1, a first insulation component 2, and a second insulation component 5, wherein an air cavity 8 is formed between the bellows 1, the first insulation component 2, and the second insulation component 3, and the air cavity is an annular closed air cavity. The present application not only insulates the bellows expansion joint through the first insulation component and the second insulation component, but also effectively prevents a large amount of heat loss in the expansion joint through the dual effect of the air cavity, thereby achieving the purpose of high efficiency and energy saving.

[0036] As a preferred embodiment of the present application, the two ends of the bellows 1 are respectively connected to the first connection part 13 and the second connection part 14, the two ends of the first insulation component 2 are respectively connected to the first end 3 and the second end 4, the first end 3 is fixedly connected to the end of the first connection part 13 away from the second insulation component 5, the second insulation component 5 is connected to the second connection part 14, and the second insulation component 5 is slidably sealed and connected to the second end 4 through the sealing component 6. This arrangement effectively avoids air circulation and improves the thermal insulation effect of the bellows expansion joint through the fixed connection between the first end and the first insulation component, and the second end is connected to the second connection part through the sealing component, which improves the sealing between the first insulation component, the second insulation component and the bellows, and improves the thermal insulation effect of the bellows expansion joint. At the same time, it also avoids damage or destruction of the insulation layer caused by repeated stretching or compression of the first insulation component and the second insulation component, and fails to insulate the bellows expansion joint.

[0037] Specifically, the first end and the second end are both ring plate structures.

[0038] As a preferred embodiment of the present application, the sealing assembly includes a ferrule 62, a ferrule fixing ring 63, a sealing plate 64, and a bolt 65, wherein the ferrule 62 is embedded in the second end 4, the ferrule fixing ring 63 is located on the surface of the second end 4 away from the first end 3, the ferrule fixing ring is tightly fitted with the second end, the sealing plate 64 is in close contact with the ferrule fixing ring 63, and the sealing plate 64 is slidably connected with the second heat preservation assembly 5, and the bolt 65 is sequentially penetrated into the sealing plate 64 and the ferrule fixing ring 63 and fixed in the ferrule 62. By providing the ferrule and the ferrule fixing ring, the firmness of the bolt connection is improved, and by providing the sealing plate, the sealing between the first heat preservation assembly and the second heat preservation assembly is improved.

[0039] Specifically, the sealing plate is an embedded sealing ring plate.

[0040] As a preferred embodiment of the present application, the sealing assembly 6 further includes a sealing ring 61, which is sleeved on the second heat-insulating assembly 5, and the sealing ring 61 is in close contact with the second end portion 4, and the sealing ring 61 is in close contact with the sealing plate 64. The sealing ring is provided to improve the sealing between the second heat-insulating assembly and the first heat-insulating assembly, thereby avoiding the problem of poor heat-insulating effect caused by air circulation.

[0041] As a preferred embodiment of the present application, the bellows 1 includes a first bellows unit 11 and a second bellows unit 12, and the first bellows unit 11 and the second bellows unit 12 are connected via a middle portion.

[0042] Specifically, one end of the first corrugated unit is connected to the first connection part, the other end of the first corrugated unit is connected to one end of the middle part, the other end of the middle part is connected to one end of the second corrugated unit, and the other end of the second corrugated unit is connected to the second connection part.

[0043] Specifically, the first connecting portion, the second connecting portion and the middle portion are all tube structures.

[0044] As a preferred embodiment of the present application, the first corrugated unit 11 and the second corrugated unit 12 both include crests, and the distance between the first end 3 and the nearest crest is greater than the distance between the second heat-insulating component 5 and the nearest crest.

[0045] This arrangement increases the area of ​​the air cavity, so that the entire bellows can be effectively insulated and heat loss can be reduced.

[0046] As a preferred embodiment of the present application, the first thermal insulation component 2 includes an outer protective member 21, a first thermal insulation layer 22, and a thermal insulation tube 23, wherein the first thermal insulation layer 22 is located between the outer protective member 21 and the thermal insulation tube 23. The outer protective layer is made of metal material, and the outer protective layer is a cylindrical structure. Preferably, the first thermal insulation layer is made of thermal insulation material, the thermal insulation tube is made of metal material, and the thermal insulation tube is welded to the second end.

[0047] As a preferred embodiment of the present application, the second thermal insulation component 5 includes a left connecting part 51, a right connecting part 52, an upper connecting part 53, and a second thermal insulation layer 54. The left connecting part 51 and the right connecting part 52 are both connected to the second connecting part 14 by welding. The upper connecting part 53 is slidably connected to the sealing component 6. The connection methods between the left connecting part and the upper connecting part and between the upper connecting part and the right connecting part are both welding. The second thermal insulation layer 54 is located in the cavity formed by the left connecting part 51, the right connecting part 52, the upper connecting part 53, and the second connecting part 14. The material of the second thermal insulation layer is thermal insulation material.

[0048] Specifically, the upper connecting part is a tubular structure, and the left connecting part and the right connecting part are ring plate structures.

[0049] Specifically, the sealing ring 61 is sleeved on the upper connecting portion 53 .

[0050] Specifically, the first end portion 3 and the first connecting portion 13 are connected by welding.

[0051] Specifically, the second heat-insulating component 5 and the second connecting portion 14 are connected by welding.

[0052] Specifically, it also includes a flow guide tube 7 , and the flow guide tube 7 is connected to the first connecting portion 13 .

[0053] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A thermal insulation bellows expansion joint, characterized in that: The invention comprises a bellows (1), a first thermal insulation component (2), and a second thermal insulation component (5); an air cavity (8) is formed between the bellows (1), the first thermal insulation component (2), and the second thermal insulation component (5); two ends of the bellows (1) are respectively connected to a first connection part (13) and a second connection part (14); two ends of the first thermal insulation component (2) are respectively connected to a first end part (3) and a second end part (4); the first end part (3) is fixedly connected to an end of the first connection part (13) away from the second thermal insulation component (5); the second thermal insulation component (5) is connected to the second connection part (14); and the second thermal insulation component (5) is slidably sealedly connected to the second end part (4) via a sealing component (6).

2. The thermal insulation bellows expansion joint according to claim 1, characterized in that: The sealing assembly (6) comprises a ferrule (62), a ferrule fixing ring (63), a sealing plate (64), and a bolt (65), wherein the ferrule (62) is embedded in the second end portion (4), the ferrule fixing ring (63) is located on the surface of the end of the second end portion (4) away from the first end portion (3), the sealing plate (64) is in close contact with the ferrule fixing ring (63), and the sealing plate (64) is slidably connected to the second insulation assembly (5), and the bolt (65) is successively inserted into the sealing plate (64) and the ferrule fixing ring (63) and fixed in the ferrule (62).

3. The thermal insulation bellows expansion joint according to claim 1, characterized in that: The sealing component (6) comprises a sealing ring (61), the sealing ring (61) is sleeved on the second heat-insulating component (5), and the sealing ring (61) is in close contact with the second end portion (4).

4. The thermal insulation bellows expansion joint according to claim 1, characterized in that: The corrugated tube (1) comprises a first corrugated unit (11) and a second corrugated unit (12); the first corrugated unit (11) and the second corrugated unit (12) are connected via a middle portion (15).

5. The thermal insulation bellows expansion joint according to claim 4, characterized in that: The second thermal insulation component (5) comprises a left connecting part (51), a right connecting part (52), an upper connecting part (53), and a second thermal insulation layer (54); the left connecting part (51) and the right connecting part (52) are both connected to the second connecting part (14); the upper connecting part (53) is connected to the sealing component (6); and the second thermal insulation layer (54) is located in a cavity formed by the left connecting part (51), the right connecting part (52), the upper connecting part (53), and the second connecting part (14).

6. The thermal insulation bellows expansion joint according to claim 4, characterized in that: The first end portion (3) and the first connecting portion (13) are connected by welding.

7. The thermal insulation bellows expansion joint according to claim 4, characterized in that: The second heat-insulating component (5) and the second connecting portion (14) are connected by welding.

8. The thermal insulation bellows expansion joint according to claim 4, characterized in that: It also comprises a flow guide tube (7), wherein the flow guide tube (7) is connected to the first connecting portion (13).

9. The thermal insulation bellows expansion joint according to claim 1, characterized in that: The first thermal insulation component (2) comprises an outer protective member (21), a first thermal insulation layer (22), and a thermal insulation tube (23), wherein the first thermal insulation layer (22) is located between the outer protective member (21) and the thermal insulation tube (23).

10. The thermal insulation bellows expansion joint according to claim 1, characterized in that: The first end (3) and the second end (4) are both ring plate structures.

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