CN220506098U - Expansion joint and high-temperature pipeline - Google Patents

Abstract

The utility model discloses an expansion joint and a high-temperature pipeline using the expansion joint, wherein the expansion joint comprises a fixed pipe section, a movable pipe section, a connecting part and a cooling assembly, the fixed pipe section and the movable pipe section comprise a first pipe section and a second pipe section, the first pipe section and the second pipe section are bent pipe sections, the free ends of the first pipe section and the second pipe section extend coaxially, and the movable pipe section is connected between the free ends of the first pipe section and the second pipe section; the connecting part is arranged in the set interval and is connected between the fixed pipe section and the movable pipe section in a sealing way, and the length of the connecting part is adjustable; the cooling component is arranged on any one of the fixed pipe section and the movable pipe section, and is connected with the connecting part. The expansion joint provided by the embodiment of the utility model has the advantages of high structural reliability and longer operation period.

Description

Expansion joint and high-temperature pipeline

Technical Field

The utility model relates to the technical field of pipeline equipment, in particular to an expansion joint and a high-temperature pipeline using the expansion joint.

Background

The expansion joint is a flexible element which can effectively compensate axial deformation, has large axial flexibility and is easy to deform, and can compensate thermal expansion difference of the high-temperature pipeline and the shell due to different wall temperatures, so that the axial load of the high-temperature pipeline is reduced, and the temperature difference stress of the high-temperature pipeline, the tube plate and the shell is reduced, and the strength damage, the instability damage and the pull-out damage are avoided. The expansion joint in the related art is easy to cause the problems of coking in the pipe or structural failure.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. For this reason, the embodiment of the utility model provides an expansion joint which has the advantages of high structural reliability and long operation period.

The expansion joint comprises a fixed pipe section and a movable pipe section, wherein the fixed pipe section comprises a first pipe section and a second pipe section, the first pipe section and the second pipe section are bent pipe sections, the free ends of the first pipe section and the free ends of the second pipe section extend coaxially, the movable pipe section is connected between the free ends of the first pipe section and the free ends of the second pipe section, and a set interval is reserved between the movable pipe section and the fixed pipe section so as to adapt to thermal deformation of a pipeline where the expansion joint is located; the connecting part is arranged in the set interval and is connected between the fixed pipe section and the movable pipe section in a sealing way, and the length of the connecting part is adjustable to adapt to the width change of the set interval; the cooling component is arranged on any one of the fixed pipe section and the movable pipe section, and is connected with the connecting part and suitable for reducing the working temperature of the connecting part, so that the connecting part is prevented from being heated to cause structural failure.

The expansion joint provided by the embodiment of the utility model has the advantages of high structural reliability and longer operation period.

In some embodiments, the connecting portion includes a first portion provided at one end of the fixed pipe section and extending along a circumferential closure of the fixed pipe section, a second portion provided at one end of the movable pipe section and extending along a circumferential closure of the movable pipe section, the first portion being fitted in the second portion and movable relative to the second portion, and a bellows provided at an outer peripheral side of the first portion and connected between the fixed pipe section and the movable pipe section to close a gap between the first portion and the second portion.

In some embodiments, the first portion is made of a heat-insulating material, one end of the first portion is connected to the inner wall of the fixed pipe section, the other end of the first portion extends to the outer side of the fixed pipe section along the axial direction of the movable pipe section, a first gap is formed between the first portion and one end of the fixed pipe section, and a part of the second portion can be matched in the first gap.

In some embodiments, one end of the second portion is connected to the inner wall of the movable pipe section, the other end of the second portion extends to the outer peripheral side of the first portion along the axial direction of the movable pipe section and is fitted into the second portion, and a second gap is provided between the second portion and the inner wall of the movable pipe section so that the second portion is fitted inside the inner wall of the fixed pipe section.

In some embodiments, the cooling component is disposed on the movable pipe section, and the cooling component is in communication with the second gap and is adapted to introduce a cooling medium into the second gap to reduce the temperature of the bellows.

In some embodiments, the cooling assembly includes an annular tube sleeved on and extending along the outer peripheral side of the movable tube section, and a plurality of air inlet tubes connected between the annular tube and the movable tube section to communicate the annular tube with the second gap, and the plurality of air inlet tubes are arranged at uniform intervals along the outer periphery of the movable tube section.

In some embodiments, the annular tube includes an air inlet valve connected to an upper end of the annular tube for the flow of cooling medium into the annular tube, and a drain valve provided at a lower end of the annular tube to be adapted to drain waste liquid in the annular tube.

In some embodiments, an insulation layer is disposed in the movable pipe section, the insulation layer is disposed on an inner wall of the movable pipe section to reduce heat loss in the movable pipe section, an annular protrusion is disposed at an end of the insulation layer, which is close to the fixed pipe section, and at least a portion of the first portion may be fitted in the annular protrusion to reduce heat loss between the first portion and the insulation layer.

In some embodiments, the expansion joint further comprises a connecting rod assembly, wherein the connecting rod assembly is arranged on the movable pipe section, one end of the connecting rod assembly is connected with the first pipe section, the other end of the connecting rod assembly is connected with the second pipe section, and the length of the connecting rod assembly is adjustable so that the distance between the first pipe section and the movable pipe section is the same as the distance between the second pipe section and the movable pipe section;

the expansion joint further comprises a pull rod, one end of the pull rod is arranged on the first pipe section, the other end of the pull rod is arranged on the second pipe section, and at least part of the movable pipe section is sleeved on the pull rod, so that the movable pipe section can slide along the length direction of the pull rod.

The high-temperature pipeline of the embodiment of the utility model comprises an expansion joint, wherein the expansion joint is the expansion joint in any embodiment.

Drawings

Fig. 1 is a schematic structural view of an expansion joint according to an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view at A-A in fig. 1.

Fig. 3 is a partially enlarged schematic view at B in fig. 1.

Fig. 4 is a schematic structural view of a connecting rod assembly of an expansion joint according to an embodiment of the present utility model.

Reference numerals:

fixing the pipe section 1; a first pipe segment 101; a second pipe segment 102;

a movable pipe section 2; a heat insulating layer 21; an annular protrusion 211;

a connection part 3; a first connection portion 301; a second connection portion 302; a first portion 31; a second portion 32; a bellows 33; a first gap 34; a second gap 35;

a cooling component 4; a first component 401; a second component 402; an annular tube 41; an intake pipe 42; an intake valve 43; a drain valve 44;

a link assembly 5; a first connection location 51; a second connection location 52; a third connection location 53; a first section 501; a second section 502;

a pull rod 6.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

An expansion joint according to an embodiment of the present utility model is described below with reference to fig. 1, 2, 3 and 4.

The expansion joint of the embodiment of the utility model comprises a fixed pipe section 1, a movable pipe section 2, a connecting part 3 and a cooling component 4.

The fixed pipe section 1 comprises a first pipe section 101 and a second pipe section 102, the first pipe section 101 and the second pipe section 102 are bent pipe sections, the free end of the first pipe section 101 and the free end of the second pipe section 102 extend coaxially, the movable pipe section 2 is connected between the free end of the first pipe section 101 and the free end of the second pipe section 102, and a set interval is arranged between the movable pipe section 2 and the fixed pipe section 1 so as to adapt to the thermal deformation of a pipeline where the expansion joint of the embodiment of the utility model is located. The connecting part 3 is arranged in the set interval and is connected between the fixed pipe section 1 and the movable pipe section 2 in a sealing way, and the length of the connecting part 3 is adjustable to adapt to the width change of the set interval.

Specifically, the fixed pipe section 1 includes a first pipe section 101 and a second pipe section 102, one end of the first pipe section 101 is connected to one end of the high temperature pipe, one end of the second pipe section 102 is connected to the other end of the high temperature pipe, and the movable pipe section 2 is connected between the other end of the first pipe section 101 and the other end of the second pipe section 102 so that a medium in the high temperature pipe flows between the fixed pipe and the movable pipe, and a set interval is provided between the fixed pipe section 1 and the movable pipe section 2 so that the fixed pipe section 1 and the movable pipe section 2 expand after being heated.

The connecting portion 3 comprises a first connecting portion 301 and a second connecting portion 302, the movable pipe section 2 is connected with the first pipe section 101 through the first connecting portion 301, the movable pipe section 2 is connected with the second pipe section 102 through the second connecting portion 302, when the high-temperature pipeline is heated and expanded, the first pipe section 101 and the second pipe section 102 connected with the high-temperature pipeline move towards the movable pipe section 2, the width of the set interval is changed, the two ends of the connecting portion 3 are connected at the two ends of the set interval, and the length of the connecting portion 3 is adjustable so that the connecting portion 3 can adapt to the change of the width of the set interval after the high-temperature pipeline is heated and deformed.

The cooling component 4 is arranged on any one of the fixed pipe section 1 and the movable pipe section 2, and the cooling component 4 is connected with the connecting part 3 and is suitable for reducing the working temperature of the connecting part 3 so as to prevent the connecting part 3 from being heated to cause structural failure.

Specifically, the cooling components 4 are disposed on the movable pipe section 2 and are located at the outer peripheral side of the movable pipe section 2, the two cooling components 4 are in one-to-one correspondence with the two connecting portions 3, and each cooling component 4 is adapted to reduce the temperature of the corresponding connecting portion 3 when the expansion joint according to the embodiment of the utility model works, so that the temperature of the connecting portion 3 does not exceed the safe temperature of the connecting portion 3, and further structural failure of the connecting portion 3 due to heating or sintering of fluid in a high-temperature pipeline at the inner side of the connecting portion 3 is prevented.

According to the expansion joint, the temperature of the connecting part 3 of the expansion joint is reduced by arranging the cooling component 4 on the outer peripheral side of the movable pipe section 2, so that the temperature of the connecting part 3 does not exceed the safe temperature of the connecting part 3, and further structural failure of the connecting part 3 caused by heating under the high temperature condition or sintering of fluid in a high-temperature pipeline inside the connecting part 3 are prevented, and the expansion joint can work for a long time under the high temperature environment, and has the advantages of high structural reliability and long operation period.

In some embodiments, the connection portion 3 includes a first portion 31 provided at one end of the fixed pipe section 1 and extending in a closed manner along the circumferential direction of the fixed pipe section 1, a second portion 32 provided at one end of the movable pipe section 2 and extending in a closed manner along the circumferential direction of the movable pipe section 2, and a bellows 33 provided at the outer circumferential side of the first portion 31 and connected between the fixed pipe section 1 and the movable pipe section 2 so as to close a gap between the first portion 31 and the second portion 32, the first portion 31 being fitted in the second portion 32 and the first portion 31 being movable relative to the second portion 32.

Specifically, the first portion 31 is disposed at an end of the fixed pipe section 1 facing the movable pipe section 2, and the first portion 31 extends in a closed manner along a circumferential direction of the fixed pipe section 1, the second portion 32 is disposed at an end of the movable pipe section 2 facing the fixed pipe section 1, and the second portion 32 extends in a closed manner along a circumferential direction of the movable pipe section 2, and an outer diameter of the first portion 31 is smaller than an inner diameter of the second portion 32, so that at least a portion of the first portion 31 is fittable within the second portion 32.

The length dimension of the bellows 33 in the axial direction thereof is adjustable so that the length of the bellows 33 is varied, one end of the bellows 33 is sealingly connected to the wall of the fixed pipe section 1, the other end of the bellows 33 is sealingly connected to the wall of the movable pipe section 2, and both the first portion 31 and the second portion 32 are located in the inner wall of the bellows 33, so that the bellows 33 seals both the first portion 31 and the second portion 32 inside the bellows 33.

Therefore, the first portion 31 is assembled in the second portion 32, when high-temperature fluid exists in the movable pipe section 2 and the fixed pipe section 1, the high-temperature fluid needs to bypass the first portion 31 and the second portion 32 to flow to the inner side of the corrugated pipe 33, so that on one hand, the temperature of the high-temperature fluid at the corrugated pipe 33 can be effectively reduced, on the other hand, the disturbance of the connecting portion 3 on the high-temperature fluid in the fixed pipe section 1 can be reduced, and the influence of the expansion joint of the embodiment of the utility model on a high-temperature pipeline is reduced.

In some embodiments, the first portion 31 is made of a thermal insulation material, one end of the first portion 31 is connected to the inner wall of the fixed pipe section 1, the other end of the first portion 31 extends to the outer side of the fixed pipe section 1 along the axial direction of the movable pipe section 2, a first gap 34 is formed between the first portion 31 and one end of the fixed pipe section 1, and a part of the second portion 32 can be fitted in the first gap 34.

Specifically, the first portion 31 is that an end portion of the first portion 31 protrudes out of the fixed pipe section 1, and an outer diameter of the first portion 31 is smaller than an inner diameter of the fixed pipe section 1 to form a first gap 34 between an outer wall of the first portion 31 and an inner wall of the fixed pipe section 1, and the second portion 32 is fitted in the first gap 34.

Therefore, the first portion 31 is made of the heat insulation material, so that heat dissipation of high-temperature fluid in the movable pipe section 2 and the fixed pipe section 1 at the connecting portion 3 can be effectively reduced, and the influence of the expansion joint of the embodiment of the utility model on the high-temperature fluid in the high-temperature pipeline is reduced. When high-temperature fluid exists in the movable pipe section 2 and the fixed pipe section 1, the high-temperature fluid needs to bypass the first part 31 and enter the first gap 34, and bypass the end part of the second part 32 in the first gap 34 to be in contact with the corrugated pipe 33, so that the temperature of the high-temperature fluid at the inner wall of the corrugated pipe 33 is reduced, the inner wall sintering of the corrugated pipe 33 is avoided, and the thermal stress of the welding position of the corrugated pipe 33 is reduced.

In some embodiments, one end of the second portion 32 is connected to the inner wall of the movable pipe section 2, the other end of the second portion 32 extends to the outer peripheral side of the first portion 31 in the axial direction of the movable pipe section 2 and the first portion 31 is fitted into the second portion 32 with a second gap 35 between the second portion 32 and the inner wall of the movable pipe section 2 so that the second portion 32 is fitted inside the inner wall of the fixed pipe section 1.

Specifically, the second portion 32 is of a tubular structure, an axis of the second portion 32 coincides with an axis of the movable pipe section 2, one end of the second portion 32 is connected to an inner wall of the movable pipe section 2, the other end of the second portion 32 extends into the first gap 34, a set interval is formed between an outer wall surface of the second portion 32 and the bellows 33, and a second gap 35 is formed between an outer wall surface of the second portion 32 and an inner wall surface of the movable pipe section 2.

Therefore, the second portion 32 is spaced from the first portion 31, the corrugated tube 33 and the fixed tube section 1, when high-temperature fluid exists in the movable tube section 2 and the fixed tube section 1, the high-temperature fluid needs to bypass the first portion 31 and enter the first gap 34, and bypass the end portion of the second portion 32 in the first gap 34 to enter the second gap 35 between the second portion 32 and the corrugated tube 33 and contact the corrugated tube 33, so that the temperature of the high-temperature fluid at the inner wall of the corrugated tube 33 is reduced, sintering of the inner wall of the corrugated tube 33 is avoided, and thermal stress of welding positions of the corrugated tube 33 is reduced, and the expansion joint provided by the embodiment of the utility model has the advantages of high structural reliability and long operation period.

In some embodiments, the cooling assembly 4 is disposed on the movable tube section 2, and the cooling assembly 4 is in communication with the second gap 35 and is adapted to introduce a cooling medium into the second gap 35 to reduce the temperature of the bellows 33.

Specifically, the cooling component 4 is sleeved at one end of the movable pipe section 2, which is close to the fixed pipe section 1, and the cooling component 4 includes a first component 401 and a second component 402, the first component 401 is disposed at one end of the movable pipe section 2, which is close to the first pipe section 101, and the first component 401 is connected with the outer wall of the first connecting portion 301 so that the first component 401 is communicated with the second gap 35 inside the first connecting portion 301, the second component 402 is disposed at one end of the movable pipe section 2, which is close to the second pipe section 102, and the second component 402 is connected with the outer wall of the second connecting portion 302 so that the second component 402 is communicated with the second gap 35 inside the second connecting portion 302.

Therefore, when high-temperature fluid exists in the movable pipe section 2 and the fixed pipe section 1, the cooling medium is introduced into the second gap 35 of the connecting part 3 through the cooling component 4, the cooling medium can be low-temperature fluid which is inert gas and the like and does not react with the high-temperature fluid, the high-temperature fluid contacting with the inner wall of the corrugated pipe 33 is extruded out of the second gap 35 and/or the first gap 34 after entering the second gap 35, and the cooling medium contacts with the inner wall of the corrugated pipe 33 to reduce the temperature of the corrugated pipe 33, so that sintering of the inner wall of the corrugated pipe 33 is avoided, and thermal stress of a welding position of the corrugated pipe 33 is reduced, and the expansion joint provided by the embodiment of the utility model has the advantages of high structural reliability and long operation period.

In some embodiments, the cooling assembly 4 includes an annular pipe 41 and a plurality of air inlet pipes 42, the annular pipe 41 is sleeved on the outer peripheral side of the movable pipe section 2 and extends along the outer peripheral side of the movable pipe section 2 in a closed manner, the plurality of air inlet pipes 42 are connected between the annular pipe 41 and the movable pipe section 2 to communicate the annular pipe 41 and the second gap 35, and the plurality of air inlet pipes 42 are arranged at uniform intervals along the outer periphery of the movable pipe section 2.

Specifically, the annular tube 41 is fitted around the outer peripheral side of the movable tube section 2, and the air intake tube 42 is connected between the connection portion 3 and the annular tube 41 to communicate the second gap 35 of the connection portion 3 with the inner cavity of the annular tube 41, so that the cooling medium in the annular tube 41 flows into the second gap 35 through the air intake tube 42 to cool the bellows 33.

Therefore, the plurality of air inlet pipes 42 are uniformly arranged at intervals along the circumferential direction of the annular pipe 41, so that cooling medium in the annular pipe 41 can be uniformly distributed along the circumferential direction of the second gap 35 after entering the second gap 35, the temperature of each part of the corrugated pipe 33 is synchronously reduced, and the thermal stress of the welding position of the corrugated pipe 33 is reduced, so that the expansion joint of the embodiment of the utility model has the advantages of high structural reliability and long operation period.

In some embodiments, the annular tube 41 includes an air intake valve 43 and a drain valve 44, the air intake valve 43 being connected to an upper end of the annular tube 41 for the flow of cooling medium into the annular tube 41, the drain valve 44 being provided at a lower end of the annular tube 41 to be adapted to drain the waste liquid in the annular tube 41.

Specifically, the intake valve 43 is provided at the upper end of the annular pipe 41, the intake valve 43 is connected to the air supply device to introduce the cooling medium into the annular pipe 41, and when the pressure of the cooling medium in the annular pipe 41 is insufficient, the high-temperature fluid in the second gap 35 is liable to flow back into the annular pipe 41 through the intake pipe 42, cool in the annular pipe 41, and accumulate at the lower end of the annular pipe 41.

Thus, the drain valve 44 is provided at the lower end of the annular tube 41 to facilitate the discharge of the waste liquid accumulated in the annular tube 41 to avoid the waste liquid in the annular tube 41 from entering the second gap 35 through the air inlet tube 42 to contaminate the high-temperature fluid flowing in the movable tube section 2 and the fixed tube section 1.

In some embodiments, the movable pipe section 2 is provided with an insulation layer 21, the insulation layer 21 is disposed on the inner wall of the movable pipe section 2 to reduce heat loss in the movable pipe section 2, the end of the insulation layer 21 near the fixed pipe section 1 is provided with an annular protrusion 211, and at least part of the first portion 31 can be fitted in the annular protrusion 211 to reduce heat loss between the first portion 31 and the insulation layer 21.

Specifically, the heat preservation 21 is a tubular structure, the outer wall of the heat preservation 21 is attached to the inner wall of the movable pipe section 2, the high-temperature fluid flowing through the movable pipe section 2 can flow through the inner side of the inner wall of the heat preservation 21, the heat preservation 21 is made of heat preservation material, the end part of the heat preservation 21 along the length direction of the heat preservation 21 is provided with an annular protrusion 211, the annular protrusion 211 extends along the circumferential direction of the movable pipe section 2 in a closed mode and protrudes to the connecting part 3, the outer wall of the annular protrusion 211 is attached to the inner wall of the movable pipe section 2, the thickness of the annular protrusion 211 is smaller than the width of the first gap 34, and at least part of the annular protrusion 211 can be matched in the first gap 34 when the movable pipe section 2 moves towards the fixed pipe section 1.

Therefore, the heat preservation layer 21 can reduce heat loss in the high-temperature fluid in the movable pipe section 2, reduce the influence of the expansion joint of the embodiment of the utility model on the high-temperature fluid in the high-temperature pipeline, and at least part of the annular protrusions 211 can be matched in the first gap 34 to improve the axial coverage range of the heat preservation layer 21 and increase the moving stroke of the movable pipe section 2 towards the fixed pipe section 1, so that the expansion joint of the embodiment of the utility model can adapt to larger deformation of the high-temperature pipeline.

In some embodiments, the expansion joint further includes a link assembly 5, where the link assembly 5 is disposed on the movable pipe section 2, and one end of the link assembly 5 is connected to the first pipe section 101, and the other end of the link assembly 5 is connected to the second pipe section 102, and the length of the link assembly 5 is adjustable so that the distance between the first pipe section 101 and the movable pipe section 2 is the same as the distance between the second pipe section 102 and the movable pipe section 2.

Specifically, the connecting rod assembly 5 is connected between the first pipe section 101, the movable pipe section 2 and the second pipe section 102, the connecting position of the connecting rod assembly 5 and the movable pipe section 2 is located in the middle of the movable pipe section 2, the first connecting position 51 is located between the connecting rod assembly 5 and the movable pipe section 2, the second connecting position 52 is located between the connecting rod assembly 5 and the first pipe section 101, and the third connecting position 53 is located between the connecting rod assembly 5 and the second pipe section 102.

The connecting rod assembly 5 comprises a first segment 501 and a second segment 502, the part of the connecting rod assembly 5 between the first connection position 51 and the second connection position 52 forms the first segment 501, the part of the connecting rod assembly 5 between the third connection position 53 and the second connection position 52 forms the second segment 502, and the lengths of the first segment 501 and the second segment 502 are always the same.

Therefore, the lengths of the first section 501 and the second end are kept the same, so that the distance between the first pipe section 101 and the movable pipe section 2 and the distance between the second pipe section 102 and the movable pipe section 2 are the same, and the lengths of the first connecting portion 301 and the second connecting portion 302 are further the same, so that the first connecting portion 301 and the second connecting portion 302 have the same deformation amount when the high-temperature pipeline expands or contracts, and structural damage caused by overlarge deformation amount of one of the first connecting portion 301 and the second connecting portion 302 is avoided, and the expansion joint provided by the embodiment of the utility model has the advantages of high structural reliability and long operation period.

The expansion joint further comprises a pull rod 6, one end of the pull rod 6 is arranged on the first pipe section 101, the other end of the pull rod 6 is arranged on the second pipe section 102, and at least part of the movable pipe section 2 is sleeved on the pull rod 6, so that the movable pipe section 2 can slide along the length direction of the pull rod 6.

Specifically, the plurality of tie rods 6 are arranged at regular intervals along the circumference of the movable pipe section 2, one end of each tie rod 6 is connected with the first pipe section 101, the other end of each tie rod 6 is connected with the second pipe section 102, each tie rod 6 can stretch out and draw back along the length direction of the tie rod 6 to adapt to the change of the distance between the first pipe section 101 and the second pipe section 102, the movable pipe section 2 is provided with a sliding seat, and the sliding seat is sleeved on the outer circumferential side of the tie rod 6, so that the movable pipe section 2 can move along the axial direction of the tie rod 6 and limit the radial movement of the movable pipe section 2 along the tie rod 6.

Therefore, when the high-temperature pipeline expands or contracts, the first pipe section 101 and the second pipe section 102 displace along the axial direction of the first pipe section and the second pipe section, and the plurality of pull rods 6 can bear thermal stress in the high-temperature pipeline when the high-temperature pipeline expands or contracts so as to reduce the expansion and contraction amount of the first connecting part 301 and the second connecting part 302, and the deformation amount of the connecting part 3 is reduced so as to reduce the probability of structural damage at the connecting part 3, so that the expansion joint provided by the embodiment of the utility model has the advantages of high structural reliability and longer operation period.

The high temperature pipeline according to the embodiment of the present utility model is described below.

The high-temperature pipeline of the embodiment of the utility model comprises an expansion joint, wherein the expansion joint is any one of the expansion joints in the embodiment

Specifically, the expansion joint of the embodiment of the utility model reduces the temperature of the connecting part 3 of the expansion joint of the embodiment of the utility model during operation by arranging the cooling component 4 on the outer peripheral side of the movable pipe section 2, so that the temperature of the connecting part 3 does not exceed the safe temperature of the connecting part 3, and further, structural failure of the connecting part 3 caused by heating or sintering of fluid in a high-temperature pipeline on the inner side of the connecting part 3 are prevented, the expansion joint of the embodiment of the utility model can work for a long time in a high-temperature environment, and the expansion joint has the advantages of high structural reliability and long operation period.

In the description of the present utility model, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (10)

1. An expansion joint, comprising:

the fixed pipe section comprises a first pipe section and a second pipe section, the first pipe section and the second pipe section are bent pipe sections, the free ends of the first pipe section and the free ends of the second pipe section extend coaxially, the movable pipe section is connected between the free ends of the first pipe section and the free ends of the second pipe section, and a set interval is arranged between the movable pipe section and the fixed pipe section so as to adapt to thermal deformation of a pipeline where the expansion joint is located;

the connecting part is arranged in the set interval and is connected between the fixed pipe section and the movable pipe section in a sealing way, and the length of the connecting part is adjustable to adapt to the width change of the set interval;

the cooling component is arranged on any one of the fixed pipe section and the movable pipe section, and is connected with the connecting part and suitable for reducing the working temperature of the connecting part, so that the connecting part is prevented from being heated to cause structural failure.

2. The expansion joint according to claim 1, wherein the connecting portion includes a first portion provided at one end of the fixed pipe section and extending in a circumferential closing direction of the fixed pipe section, a second portion provided at one end of the movable pipe section and extending in a circumferential closing direction of the movable pipe section, the first portion being fitted in the second portion and movable relative to the second portion, and a bellows provided at an outer peripheral side of the first portion and connected between the fixed pipe section and the movable pipe section to close a gap between the first portion and the second portion.

3. The expansion joint according to claim 2, wherein the first portion is made of a heat insulating material, one end of the first portion is connected to an inner wall of the fixed pipe section, the other end of the first portion extends to an outer side of the fixed pipe section along an axial direction of the movable pipe section, a first gap is formed between the first portion and one end of the fixed pipe section, and a part of the second portion is fittable in the first gap.

4. The expansion joint according to claim 3, wherein one end of the second portion is connected to the inner wall of the movable pipe section, the other end of the second portion extends to the outer peripheral side of the first portion in the axial direction of the movable pipe section and is fitted into the second portion with a second clearance between the second portion and the inner wall of the movable pipe section so that the second portion is fitted inside the inner wall of the fixed pipe section.

5. The expansion joint of claim 4, wherein the cooling assembly is disposed in the movable tube segment, the cooling assembly being in communication with the second gap and adapted to introduce a cooling medium into the second gap to reduce the temperature of the bellows.

6. The expansion joint according to claim 5, wherein the cooling assembly includes an annular pipe sleeved on and extending along an outer peripheral side of the movable pipe section, and a plurality of air intake pipes connected between the annular pipe and the movable pipe section to communicate the annular pipe and the second gap, and the plurality of air intake pipes are arranged at uniform intervals along the outer periphery of the movable pipe section.

7. The expansion joint according to claim 6, wherein the annular pipe includes an air intake valve connected to an upper end of the annular pipe for flowing a cooling medium into the annular pipe, and a drain valve provided at a lower end of the annular pipe so as to be adapted to drain waste liquid in the annular pipe.

8. The expansion joint of claim 4, wherein an insulating layer is disposed in the movable pipe section, the insulating layer being disposed on an inner wall of the movable pipe section to reduce heat loss in the movable pipe section, an end of the insulating layer adjacent to the fixed pipe section having an annular protrusion, at least a portion of the first portion being engageable in the annular protrusion to reduce heat loss between the first portion and the insulating layer.

9. The expansion joint according to any one of claims 1 to 8, further comprising a link assembly provided to the movable pipe section, one end of the link assembly being connected to the first pipe section, the other end of the link assembly being connected to the second pipe section, the link assembly being adjustable in length and making a distance between the first pipe section and the movable pipe section and a distance between the second pipe section and the movable pipe section the same;

the movable pipe section is sleeved on the pull rod, and the movable pipe section can slide along the length direction of the pull rod.

10. A high temperature pipeline comprising an expansion joint, which can be an expansion joint according to any one of claims 1-9.