CN220168859U - Supporting structure of large-caliber pipeline expansion joint shell heat tracing pipe - Google Patents

Abstract

The utility model discloses a supporting structure of a large-caliber pipeline expansion joint shell heat tracing pipe, which relates to the technical field of pipeline heat compensation. The problem of the heat tracing pipe support of heavy-calibre expansion joint is solved, provides effective support to the heat tracing pipe, reduces the construction degree of difficulty, improves on-the-spot efficiency of construction, has practiced thrift the material, and constructor only need consider the whole displacement of expansion joint can.

Description

Supporting structure of large-caliber pipeline expansion joint shell heat tracing pipe

Technical Field

The utility model relates to the technical field of pipeline thermal compensation, in particular to a supporting structure of a large-caliber pipeline expansion joint shell heat tracing pipe.

Background

When the caliber of the pipeline is large and the pressure is low, the pipeline thermal compensation mode is preferably to adopt a metal corrugated expansion joint. In order to prevent the failure of the expansion joint due to freezing of the condensate, the expansion joint needs to be subjected to heat tracing design, so that the condensate in the expansion joint is ensured not to generate freezing.

In the case of heat tracing to a large-diameter expansion joint, a large number of heat tracing pipes are coiled at the bottom of the expansion joint, so that the heat tracing pipes need to be supported and fixed. However, no expansion joint manufacturer has support design for the heat tracing pipe at present. The construction site adopts metal ribbon or galvanized iron wire to tie up the heat tracing pipe on the expansion joint.

But this approach suffers from the following drawbacks: the caliber of the pipeline is large, the length of the required binding belt is large due to the binding of a plurality of turns of the binding belt, and the defect of material waste exists; because the caliber is large, at least two constructors are matched when the traditional method is used for construction, the work can be completed only by climbing up and down, and the construction difficulty is high; although only the bottom is required to be heated, the whole expansion joint is stranded and bundled during bundling, the construction efficiency is low, and the labor hour is wasted; the traditional method is difficult to effectively fix the heat tracing pipe, the bearing capacity of the steel belt is low, deformation is easy to occur, the steel belt is easy to break when corrosion or carburization occurs, and the heat tracing effect is difficult to ensure; the constructor has difficulty in judging the overall displacement and the relative displacement of the expansion joint, and the relative displacement of the expansion joint can cause the pulling and falling of the heat tracing pipe.

Disclosure of Invention

The utility model provides a supporting structure of a large-caliber pipeline expansion joint shell heat tracing pipe, which solves the technical problems of waste materials, high construction difficulty, long construction time, difficult guarantee of heat tracing effect and possible pulling and falling of the heat tracing pipe in the heat tracing pipe bundling scheme in the prior art.

The utility model provides a supporting structure of a large-caliber pipeline expansion joint shell heat tracing pipe, which is applied to an external pressure type straight pipe pressure balance type expansion joint, wherein the external contour of the external pressure type straight pipe pressure balance type expansion joint is sequentially arranged along the axial direction according to an inlet end pipe, an external protection shell, a second-stage protection shell and an outlet end pipe.

In some embodiments, the first stationary tube clamp is disposed within about 45 ° of the bottommost portion of the inlet end tube based on 360 ° of the circumference of the inlet end tube.

In some embodiments, the second stationary tube clamp is disposed within about 45 ° of the bottommost portion of the outlet end tube based on 360 ° of the circumference of the outlet end tube.

In some embodiments, the hooks are disposed at the lowest of the outer protective shell in the range of 45 ° to 60 ° to the right and 45 ° to 60 ° to the left, based on 360 ° of the circumference of the outer protective shell.

In some embodiments, the distance between two adjacent hooks is controlled to be 20 to 30 cm from the hooks on the same side of the lower part of the protective shell.

In some embodiments, the material of the hook is the same as the material of the outer protective shell.

In some embodiments, the thickness of the hook is the same as the thickness of the outer protective shell.

In some embodiments, the first stationary tube clamp is pre-welded to the inlet end tube and the second stationary tube clamp is pre-welded to the outlet end tube.

In some embodiments, the guide tube clamp is pre-welded to the second stage protective shell.

In some embodiments, the hooks are pre-welded to the outer protective shell.

The utility model has the following beneficial effects: the support structure of the large-caliber pipeline expansion joint shell heat tracing pipe is provided and is used for supporting and fixing the disc heat pipe outside the external pressure type straight pipe pressure balance type expansion joint; the support structure comprises a first fixed pipe clamp, a second fixed pipe clamp, a guide pipe clamp and a plurality of hooks, wherein the heat tracing pipe is clamped and fixed on the inlet end pipe through the first fixed pipe clamp, is clamped and fixed on the outlet end pipe through the second fixed pipe clamp, is arranged on the outer protective shell in a coil pipe mode through the plurality of hooks in a serpentine winding manner, and guides the transition section of the heat tracing pipe through the guide pipe clamp; by adopting the supporting structure, the problem of supporting the heat tracing pipe of the large-caliber expansion joint is solved, and effective support is provided for the heat tracing pipe; the construction difficulty is reduced, and the site construction efficiency is improved; the binding belt material of the existing binding scheme is saved, and the cost is reduced; the relative displacement between the heat tracing pipe and the expansion joint is compensated, and a constructor only needs to consider the whole displacement of the expansion joint.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present utility model.

FIG. 1 is a schematic diagram of an external pressure type straight pipe pressure balance expansion joint;

FIG. 2 is a first schematic structural view of a support structure of a heat tracing pipe of a shell of a large-caliber pipeline expansion joint provided by the utility model;

fig. 3 is a second structural schematic diagram of a supporting structure of a heat tracing pipe of a shell of a large-caliber pipeline expansion joint provided by the utility model.

The drawings are marked: 100-first fixed pipe clamp, 200-second fixed pipe clamp, 300-guide pipe clamp, 400-hook, 21-inlet end pipe, 22-outer protective shell, 23-second stage protective shell, 24-outlet end pipe and 30-heat tracing pipe.

Detailed Description

Along with the increasing scale of petrochemical devices and coal chemical devices, the calibers of some torch pipelines and gas material pipelines on the whole factory pipe gallery are also increased, for example, the caliber of a high-pressure hot-flame gas pipeline in a certain coal chemical device reaches 80 inches (DN 2000), the caliber of a carbon dioxide pipeline reaches 88 inches (DN 2200), and the like. When the caliber of the pipeline is large and the pressure is low, the pipeline thermal compensation mode is preferably to adopt a metal corrugated expansion joint. When the pipeline adopts an expansion joint scheme, the gas pipeline containing condensate can generate condensate and deposit in the corrugation. When the normal operating temperature of the pipeline is the ambient temperature, in winter in northern areas, the condensate temperature in the corrugated pipe is lower than the freezing point, so that the corrugated pipe can freeze, and the compensation capability of the corrugated pipe is lost. If there is a temperature fluctuation at this time, such as a flare blow down, the temperature rises rapidly and the pipe, expansion joint or piping structure will fail because the expansion joint is unable to absorb thermal expansion. Therefore, in order to prevent the expansion joint from failing due to freezing of the condensate, it is necessary to design the expansion joint with heat, so as to ensure that the condensate in the expansion joint is not frozen.

In the case of heat tracing to a large-diameter expansion joint, a large number of heat tracing pipes are coiled at the bottom of the expansion joint, so that the heat tracing pipes need to be supported and fixed. However, no expansion joint manufacturer has support design for the heat tracing pipe at present.

In the prior art, the expansion joint heat tracing pipe is not specially supported, and the heat tracing pipe is bound on the expansion joint by adopting a metal binding belt or a galvanized iron wire on a construction site.

The existing fixing method has the following defects: (1) wasting material. Taking an external pressure type straight pipe pressure balance type expansion joint of a 60-inch caliber pipeline as an example, the diameter of an external protective shell of the expansion joint can reach 2000mm, a stainless steel ribbon is adopted, 9 rings are required to be bundled, and the total length of the stainless steel ribbon is required to be 56.5 meters. Larger diameter pipelines waste more material. And (2) the construction difficulty is high. Because the caliber is very large, when the traditional method is used for construction, at least two constructors are needed to cooperate, and the work can be completed only by climbing up and down, so that the construction difficulty is high. (3) the construction time is long. Although only the bottom is required to be heated, the whole expansion joint is required to be bundled during bundling, the construction efficiency is low, and the labor hour is wasted. (4) the effect is difficult to ensure. The traditional method is difficult to effectively fix the heat tracing pipe, the bearing capacity of the steel belt is low, deformation is easy to occur, the steel belt is easy to break when corrosion or carburization occurs, and the heat tracing effect is difficult to ensure. (5) The constructor has difficulty in judging the overall displacement and the relative displacement of the expansion joint, and the relative displacement of the expansion joint can cause the pulling and falling of the heat tracing pipe.

The utility model provides a supporting structure of a large-caliber pipeline expansion joint shell heat tracing pipe, which is used for installing a heat tracing pipe 30 on an external pressure type straight pipe pressure balance type expansion joint, wherein the heat tracing pipe 30 is shown in fig. 2 and 3.

Referring to fig. 3, the outer profile of the external pressure type straight pipe pressure balance type expansion joint is sequentially arranged in the axial direction according to an inlet end pipe 21, an external protection shell 22, a second stage protection shell 23 and an outlet end pipe 24, and the external diameter of the external protection shell 22 is larger than the external diameter of the second stage protection shell 23.

Referring to fig. 1, the external pressure type straight pipe pressure balance type expansion joint includes an inlet pipe 41, a balance bellows 42, a balance wave outer pipe 43, a working wave outer pipe 44, a guide cylinder 45, a working bellows 46, a support pipe assembly 47, and an outlet pipe 48.

In the structure of the external pressure type straight pipe pressure balance type expansion joint shown in fig. 1, the balance wave outer pipe 43 in fig. 1 corresponds to the outer protective shell 22 in fig. 3, the support pipe assembly 47 in fig. 1 corresponds to the second-stage protective shell 23 in fig. 3, and the inlet end pipe 41 and the outlet end pipe 48 in fig. 1 correspond to the inlet end pipe 21 and the outlet end pipe 24 in fig. 3, respectively. Referring to fig. 1 and 3 in combination, when the expansion joint compensates, the inlet pipe 21 and the outlet pipe 24 are relatively displaced, and the relative positions of the outer protective shell 22, the second protective shell 23 and the inlet pipe 21 remain unchanged.

Referring to fig. 3, the support structure includes a first fixing tube clip 100, a second fixing tube clip 200, a guiding tube clip 300 and a plurality of hooks 400, wherein the first fixing tube clip 100 is fixedly installed at a position outside the inlet end tube 21, the second fixing tube clip 200 is fixedly installed at a position outside the outlet end tube 24, and the first fixing tube clip 100 and the second fixing tube clip 200 respectively clamp two ends of the heat tracing tube 30. Wherein the fixed pipe clamp can provide enough clamping force to fix the heat tracing pipe 30 sections at the respective positions.

As shown in fig. 3, the guide pipe clamp 300 is fixedly installed at a position outside the second-stage protective case 23, and the heat tracing pipe 30 is movably inserted into the guide pipe clamp 300, and the guide pipe clamp 300 plays a role in guiding the heat tracing pipe 30 thereat, but does not fix the position of the heat tracing pipe 30. The guide tube clamp 300 cannot be made as a fixed tube clamp, which would otherwise affect thermal deformation and cause damage to the heat trace tube 30 or the tube clamp.

As shown in fig. 3, a plurality of hooks 400 are fixedly installed at both sides of the lower portion of the outer protective case 22, each side including a plurality of hooks 400 arranged at intervals, and the heat trace pipe 30 is hung on the hooks 400 such that the heat trace pipe 30 is wound in a serpentine shape as shown in fig. 3 at the outer protective case 22.

When the expansion joint compensates, the inlet end pipe 21 and the outlet end pipe 24 move relatively, and the heat tracing pipe 30 moves along with the fixed pipe clamp; in detail, the heat tracing pipe 30 is fixed at the first and second fixing clamps 100 and 200, the heat tracing pipe 30 is displaced at the guide clamp 300, and the serpentine coil formed at the hanger 400 of the heat tracing pipe 30 is slightly changed. In use, when the heat pipe is hung on the hanger 400, the serpentine coil is closely attached to the outer protective shell 22, and the other parts are separated by a small gap distance, and the shell serving as an insulating layer is additionally arranged on the outermost surface of the structure shown in fig. 3.

Through foretell bearing structure, it has following beneficial effect at least: the problem of supporting the heat tracing pipe 30 of the large-caliber expansion joint is solved, and effective support is provided for the heat tracing pipe 30; the construction difficulty is reduced, and the site construction efficiency is improved; the binding belt material of the existing binding scheme is saved, and the cost is reduced; the relative displacement between the heat tracing pipe 30 and the expansion joint is compensated, and a constructor only needs to consider the whole displacement of the expansion joint.

Regarding the hooks 400, in some embodiments, the hooks 400 are the same material as, or substantially the same as, the outer protective shell 22; in some embodiments, the thickness of the hook 400 is the same as, or substantially the same as, the thickness of the outer protective shell 22; in this way, the strength of the hanger 400 is ensured.

In some embodiments, among the plurality of hooks 400 on the same side of the lower portion of the protective case, the interval distance between adjacent two hooks 400 is controlled to be 20 to 30 cm. It will be appreciated that the number of hooks 400 will depend on the length of the expansion joint and the spacing of the coils of the heat pipe 30.

In some embodiments, the first and second fixed clamps 100, 200, the guide clamp 300, and the hook 400 may be welded to the expansion joint, pre-welded to the inlet end tube 21, the outlet end tube 24, the second stage protective shell 23, and the outer protective shell 22, respectively. In more detail, the support structure is pre-welded to the expansion joint housing and the end fittings by the expansion joint manufacturer and can be used directly at the construction site.

In some embodiments, based on 360 ° of the circumference of the outer protective shell 22 (as illustrated by 360 ° of the circumference in fig. 2), the hooks 400 are disposed in the range of 45 ° to 60 ° on the right and 45 ° to 60 ° on the left at the lowest position of the outer protective shell 22, so as to avoid wasting due to too high position, and reducing the heat tracing area due to too low position, which affects the heat tracing effect.

In some embodiments, the first stationary pipe clamp 100 is disposed in a range of 45 ° left at the bottommost position to 45 ° right at the bottommost position of the inlet end pipe 21 based on 360 ° of the circumference of the inlet end pipe 21.

In some embodiments, the second stationary tube clamp 200 is disposed in the range of 45 ° left at the bottom most to 45 ° right at the bottom most of the outlet end tube 24 based on 360 ° of the circumference of the outlet end tube 24.

With respect to the support structure of the present utility model, there is no particular requirement on the shape of the fixing clip, the guide clip 300 and the hook 400 so as to satisfy the functional requirement.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. The utility model provides a bearing structure of heavy-calibre pipeline expansion joint shell heat tracing pipe, its characterized in that is applied to external pressure formula straight tube pressure balance type expansion joint, external contour of external pressure formula straight tube pressure balance type expansion joint is arranged according to entrance point pipe, outer protective housing, second grade protective housing and exit end pipe in proper order in the axial, bearing structure includes:

the first fixed pipe clamp is fixedly arranged at a position, close to the lower part, outside the inlet end pipe and used for clamping the heat tracing pipe;

the second fixed pipe clamp is fixedly arranged at a position outside the outlet end pipe and is used for clamping the heat tracing pipe;

the guide pipe clamp is fixedly arranged at the position, close to the lower side outside the shell, of the second-stage protective shell, and the heat tracing pipe movably penetrates through the guide pipe clamp; and

the hooks are fixedly mounted on two sides of the lower portion of the outer protective shell, each side of the outer protective shell comprises a plurality of hooks which are arranged at intervals, and the hooks are used for hanging the heat tracing pipe, so that the heat tracing pipe is arranged in a serpentine winding mode on the outer protective shell.

2. The support structure of claim 1, wherein the first stationary tube clamp is disposed within about 45 ° of a bottommost portion of the inlet end tube based on 360 ° of a circumference of the inlet end tube.

3. The support structure of claim 1, wherein the second stationary tube clamp is disposed within 45 ° of the bottom-most portion of the outlet end tube, based on 360 ° of the circumference of the outlet end tube.

4. The support structure of claim 1, wherein the hooks are disposed in a range of 45 ° to 60 ° to the right and 45 ° to 60 ° to the left at the lowest position of the outer protective shell based on 360 ° of the circumference of the outer protective shell.

5. The support structure of claim 1, wherein a distance between adjacent two of the hooks is controlled to be 20 to 30 cm among the hooks on the same side of the lower portion of the protective case.

6. The support structure of claim 1, wherein the hooks are the same material as the outer protective shell.

7. The support structure of claim 1, wherein the thickness of the hooks is the same as the thickness of the outer protective shell.

8. The support structure of claim 1, wherein the first stationary tube clamp is pre-welded to the inlet end tube and the second stationary tube clamp is pre-welded to the outlet end tube.

9. The support structure of claim 1, wherein the guide tube clamp is pre-welded to the second stage protective shell.

10. The support structure of claim 1, wherein the hooks are pre-welded to the outer protective shell.