CN216769042U

CN216769042U - Overhead steam pipeline suspension type drainage system

Info

Publication number: CN216769042U
Application number: CN202122439134.1U
Authority: CN
Inventors: 张锦鹏; 乔正凡; 杨萌; 王磊; 杨洁; 张智斌
Original assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Current assignee: Central and Southern China Municipal Engineering Design and Research Institute Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-06-17
Anticipated expiration: 2031-10-11

Abstract

The utility model provides a suspended drainage system of an overhead steam pipeline, which comprises a drainage pipeline and a suspension part, wherein a water collection tank of the drainage pipeline is communicated with the steam pipeline and freely suspended on the steam pipeline through the suspension part, and a water outlet of the drainage pipeline is vertically arranged downwards relative to the wellhead of an underground drainage well. The suspended drainage system of the overhead steam pipeline enables the drainage pipeline to be freely suspended on the steam pipeline by arranging the suspension part, so that the drainage pipeline can move synchronously along with the steam pipeline when the steam pipeline generates thermal expansion displacement, and the risks of increased root weld joint stress and tearing of a welded junction caused by movement obstruction when the drainage pipe expands along with the large displacement of the steam pipeline are avoided.

Description

Overhead steam pipeline suspension type drainage system

Technical Field

The utility model relates to the technical field of steam pipeline drainage, in particular to a suspended drainage system for an overhead steam pipeline.

Background

The steam is inevitably subjected to temperature drop in the conveying process due to the existence of pipeline heat dissipation, and the superheated steam is gradually cooled to become saturated steam until condensation water is generated. Because the conveying flow speed of the steam in the pipeline is high (20-30m/s), if the condensed water is not discharged in time, the steam drives the condensed water to move together at a high speed, and a water hammer phenomenon is formed. When the steam pipeline is subjected to water attack, the pipeline system vibrates strongly, the stable operation of the pipe network system is influenced by light persons, and the phenomena of pipe frame loosening, welded junction leakage and the like are generated if the light persons are heavy, so that the safe operation of the pipeline is seriously damaged. In view of the above, the design code for town heating networks (CJJ34-2010) states that the low point of the steam pipeline and the vertically elevated sections of the pipeline should be preceded by means for activating and frequently draining water.

At present, the heat compensation of a steam pipeline mostly adopts a form of a rotary compensator, and a drainage system is required to be arranged in front of a vertical pipe of the rotary compensator according to the specification requirement. The drainage system valve set is generally laid on a ground support, and the structural composition of the drainage system valve set is shown in a figure 1. The condensed water enters a water collecting tank (consisting of a drain tee joint and a flange cover) after being condensed, and then is discharged into a ground drain well through a drain pipe. The amount of thermal displacement of the pipe is greatest near the rotary compensator where the trap valve set needs to be axially displaced along with the steam pipe during operation. In present design and construction, the trap valve group lays on the ground support, when the steam pipeline receives thermal expansion axial displacement, the jar that catchments, the trap valve group of drain pipe drive axial sliding displacement on the ground support, when the slip frictional force is great or the valves slip when being obstructed, can produce great relative displacement between corresponding steam main pipe and the trap, the root welding seam and the trap elbow stress of connecting water collector and trap must increase by a wide margin, can lead to the root welding seam to tear when serious, cause steam leakage, need stop the vapour maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model provides a suspended drainage system for an overhead steam pipeline, which is used for solving the technical problem.

The utility model provides an overhead steam pipeline suspension type drainage system which comprises a drainage pipeline and a suspension part, wherein a water collecting tank of the drainage pipeline is communicated with the steam pipeline and freely suspended on the steam pipeline through the suspension part, and a water outlet of the drainage pipeline is vertically arranged downwards relative to a wellhead of an underground drainage well.

Preferably, the hanger comprises a connecting part and a supporting part which are fixedly connected with each other, one end of the connecting part is fixedly welded on the steam pipeline, the other end of the connecting part is fixedly connected with the supporting part, and the supporting part is used for providing a hanging space for the drainage pipeline.

Preferably, connecting portion and supporting part mutually perpendicular set up, connecting portion are vertical to be set up, and one end and the radial welding setting of steam conduit, the supporting part level sets up.

Preferably, the drainage pipe is freely hung on the supporting part through a heat insulation support.

Preferably, the heat insulation support is provided with a hoop, the inner diameter of the hoop is matched with the drain pipeline, and heat insulation materials are arranged on the inner side of the hoop relative to the pipeline.

Preferably, the suspension member is covered with an insulating layer.

Preferably, the drainage pipeline comprises a constant drainage pipeline and a starting drainage pipeline, and the constant drainage pipeline and the starting drainage pipeline are both freely hung on the supporting part.

According to the overhead steam pipeline suspension type drainage system, the drainage pipeline is freely suspended on the steam pipeline through the suspension part, so that the drainage pipeline can synchronously move along with the steam pipeline when the steam pipeline generates thermal expansion displacement, and the risks of root weld joint stress increase and weld opening tearing caused by movement resistance when the drainage pipeline expands along with the large displacement of the steam pipeline are avoided.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic diagram of an overhead steam pipeline suspended drainage system according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 taken along A-A;

FIG. 3 is a schematic view of the structure of FIG. 1 along the direction B-B.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

The utility model provides an overhead steam pipeline suspended drainage system, which comprises a drainage pipeline 2 and a suspension part 3.

As shown in fig. 1 to 3, the water collecting tank of the drainage pipe 2 is communicated with the steam pipe 1, the pipe body horizontally and transversely extends to the upper part of the drainage well 4, and the water outlet is vertically arranged downwards relative to the wellhead of the underground drainage well 4. As shown in fig. 3, the drainage pipe 2 includes a start drainage pipe 21 and a normal drainage pipe 22, and the water outlets of the start drainage pipe 21 and the normal drainage pipe 22 are both vertically arranged downwards relative to the wellhead of the underground drainage well 4.

As shown in fig. 2, the hanger 3 includes a connecting portion 31 and a supporting portion 32 that are perpendicular to each other and fixedly connected, the connecting portion 31 is vertically disposed, one end of the connecting portion is fixedly welded to the steam pipe 1, and the other end of the connecting portion is fixedly connected to the supporting portion 32, preferably, one end of the connecting portion 31 is radially welded to the steam pipe 1; the support portion 32 is horizontally disposed to provide a hanging space for the drain pipe 2. Furthermore, in order to reduce the heat dissipation loss, a layer of heat insulation layer is wrapped outside the suspension member 3. The hanging piece 3 is preferably made of angle steel or section steel.

The hanging part 3 is oppositely arranged in the middle of the horizontal extending pipe body of the drainage pipeline 2, and as shown in fig. 2 and 3 in particular, the starting drainage pipeline 21 and the constant drainage pipeline 22 are both freely hung on the supporting part 32; further, start hydrophobic pipeline 21 and often hydrophobic pipeline 22 and hang freely through first thermal-insulated support 33, the thermal-insulated support 34 of second respectively and put on supporting part 32, be equipped with first staple bolt, second staple bolt on first thermal-insulated support 33, the thermal-insulated support 34 of second respectively, the internal diameter of first staple bolt, second staple bolt sets up with the diameter cooperation that starts hydrophobic pipeline 21, often hydrophobic pipeline 22 respectively, and the inboard of first staple bolt, second staple bolt all is equipped with thermal insulation material to avoid hydrophobic pipeline 2 and the direct contact heat conduction of flying piece 3, cause the heat to scatter and disappear. The heat insulation support 33 is not fixed on the support portion 32, so that the starting drain line 21, the constant drain line 22 and the support portion 32 are freely arranged, and the starting drain line 21 and the constant drain line 22 can freely generate smaller displacement than the support portion 32 respectively.

The drain pipe 2 forms a whole with the steam pipe 1 through the hanger 3, and when the thermal expansion displacement, the two move synchronously, there is not relative displacement to root welding seam stress that leads to because of moving the hindrance when avoiding the drain pipe to expand along with the 1 big displacement of steam pipe increases, the risk is torn to the weld opening.

According to the overhead steam pipeline suspension type drainage system, the drainage pipeline 2 is freely suspended on the steam pipeline 1 through the suspension part 3, so that the drainage pipeline 2 can synchronously move along with the steam pipeline 1 when the steam pipeline 1 is subjected to thermal expansion displacement, and the risks of root weld joint stress increase and weld opening tearing caused by movement obstruction when the drainage pipeline expands along with large displacement of the steam pipeline 1 are avoided.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An overhead steam pipeline suspension type drainage system is characterized by comprising a drainage pipeline and a suspension

The water collecting tank of the drainage pipeline is communicated with the steam pipeline and freely suspended on the steam pipeline through the suspension part, and the water outlet of the drainage pipeline is vertically arranged downwards relative to the wellhead of the underground drainage well.

2. The overhead steam pipeline suspended drainage system of claim 1, wherein the suspension member comprises a connecting portion and a supporting portion, the connecting portion is fixedly connected to the steam pipeline, one end of the connecting portion is fixedly welded to the steam pipeline, the other end of the connecting portion is fixedly connected to the supporting portion, and the supporting portion is used for providing a hanging space for the drainage pipeline.

3. The overhead steam line suspended drainage system of claim 2, wherein the connecting portion and the support portion are vertically disposed, the connecting portion is vertically disposed and one end is radially welded to the steam line, and the support portion is horizontally disposed.

4. The overhead steam duct suspended drainage system of claim 2, wherein the drainage duct is freely suspended from the support by thermally insulated standoffs.

5. The overhead steam pipeline suspended drainage system of claim 4, wherein the heat insulation support is provided with an anchor ear, the inner diameter of the anchor ear is matched with the drainage pipeline, and the anchor ear is provided with a heat insulation material relative to the inner side of the pipeline.

6. The overhead steam line suspended drainage system of claim 1, wherein the suspension member is coated with an insulating layer.

7. The overhead steam duct suspended drain system of claim 3, wherein the drain duct comprises a normal drain line and a start drain line, both of which hang freely on the support.