CN216480200U

CN216480200U - High-temperature high-pressure pipeline drainage device

Info

Publication number: CN216480200U
Application number: CN202121937788.0U
Authority: CN
Inventors: 王金海; 张辉
Original assignee: Dezhou Power Plant of Huaneng International Power Co Ltd
Current assignee: Dezhou Power Plant of Huaneng International Power Co Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-05-10
Anticipated expiration: 2031-08-18

Abstract

The utility model discloses a high-temperature and high-pressure pipeline drainage device, which comprises a hemispherical head, a drainage bag cylinder, a drainage hole, a drainage pipe seat, a drainage elbow and a drainage pipeline, wherein the hemispherical head is welded with the bottom of the drainage bag cylinder; on the basis of the prior art, the semi-spherical end socket is higher than the original drain hole, and the drain hole is arranged at the bottom of the semi-spherical end socket, so that the drain hole is arranged on one side of the drain bag, and the drain hole is arranged at the bottom of the semi-spherical end socket, so that condensed water can be drained without remaining.

Description

High-temperature high-pressure pipeline drainage device

Technical Field

The utility model relates to the technical field of pipeline drainage, in particular to a high-temperature and high-pressure pipeline drainage device.

Background

The existing reheating hot section pipeline has the problem that the inner wall metal below a drain hole of a drain bag generates thermal fatigue cracks, when the problem is discovered, preliminary analysis is carried out to consider the problem as a welding seam quality reason, and only patching treatment is carried out on a cracked part; when the maintenance is carried out again, the crack of the base metal area of the drain bag is found, and the crack does not appear in the weld heat affected zone; the inner wall of the drain bag is suspected to have inner surface cracks aiming at the abnormal phenomenon, so that the spherical seal head is cut to inspect the inner wall of the drain bag, and the magnetic powder inspection finds that a large number of annular cracks exist on the inner wall of the drain bag and the inner wall of the spherical seal head right below the drain pipe hole; the main reason for causing frequent leakage of the drain bag is unreasonable structural design of the bottom of the drain bag, and along with the increase of running time and starting and stopping times, the repeated change of temperature difference stress borne by metal on the inner wall of the drain bag finally causes thermal fatigue of the metal on the inner wall around a condensate surface, and the thermal fatigue of the area is further caused by the backflow of the condensate water, and the two are overlapped to cause cracking failure of the inner wall under a drain pipe seat of the drain bag.

Therefore, a high-temperature and high-pressure pipeline drainage device capable of effectively solving the inner wall cracking phenomenon is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the existing reheating section pipeline has thermal fatigue cracks generated by inner wall metal below a drainage hole of a drainage bag.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the utility model provides a high temperature high pressure pipeline drainage device, includes hemisphere head, hydrophobic bag barrel, hydrophobic hole, hydrophobic tube socket, hydrophobic elbow, hydrophobic pipeline, its characterized in that: the semi-spherical end socket is welded with the bottom of the drain bag barrel, the drain hole is formed in the center of the bottom of the semi-spherical end socket, the drain pipe seat is arranged at the bottom of the semi-spherical end socket and welded with the semi-spherical end socket, the drain pipe seat is communicated with the drain hole, one end of the drain elbow is welded with the drain pipe seat, and the other end of the drain elbow is welded with the drain pipeline.

Furthermore, a drain temperature measuring point pipe seat and a drain liquid level measuring pipe seat are arranged on the drain bag barrel, and the drain temperature measuring point pipe seat is higher than the drain liquid level measuring pipe seat.

Furthermore, a first butt welding seam is arranged at the bottom of the hemispherical end socket and the bottom of the drain bag cylinder.

Furthermore, a second butt welding seam is arranged between the bottom of the hemispherical seal head and the drain pipe seat.

Furthermore, a third butt welding seam is arranged between the drain pipe seat and the drain elbow.

Furthermore, the central line of the horizontal pipe section of the drainage elbow and the central line of the original drainage pipe base are on the same horizontal line, and the drainage elbow is a 90-degree drainage elbow.

Compared with the prior art, the utility model has the advantages that: on the basis of the prior art, the height of the hemispherical head is higher than that of the original drain hole, and the drain hole is arranged at the bottom of the hemispherical head, so that the drain bag replaces the prior art that the drain hole is arranged at one side of the drain bag and the drain hole is arranged at the bottom of the hemispherical head, so that condensed water can be drained without remaining; even if the drain valve is closed, the accumulated condensed water is formed in the drain pipeline and can only flow back to the vertical section of the drain elbow at most without rising any more, because the pipeline is filled with the condensed water, the reheated steam can not enter the drain pipeline, the condensed water can not be generated, and the condensed water can only be formed in the vertical section of the drain elbow; because the wall thickness of the drainage elbow is thinner, effective heat preservation is carried out, and the temperature difference stress of the inner wall of the pipe around the condensation water surface can be completely ignored; the utility model has reasonable design and is worth popularizing.

Drawings

Fig. 1 is a schematic structural diagram of a high-temperature high-pressure pipeline drainage device of the utility model.

Fig. 2 is a cross-sectional view of a high-temperature high-pressure pipeline drainage device of the utility model.

As shown in the figure: 1. the device comprises a hemispherical head, 2, a drainage bag cylinder, 3, a drainage hole, 4, a drainage pipe seat, 5, a drainage elbow, 6, a drainage pipeline, 7, a drainage temperature measuring point pipe seat, 8, a drainage liquid level measuring pipe seat, 9, a first butt welding line, 10, a second butt welding line, 11 and a third butt welding line.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplification of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention

The high-temperature high-pressure pipeline drainage device of the utility model is further described in detail with reference to the accompanying drawings.

The present invention will be described in detail with reference to the accompanying fig. 1-2.

The utility model provides a high temperature high pressure pipeline drainage device, includes hemisphere head 1, hydrophobic bag barrel 2, hydrophobic hole 3, drain tube seat 4, hydrophobic elbow 5, drain pipe 6, hemisphere head 1 and the welding of hydrophobic bag barrel 2 bottom, hydrophobic hole 3 sets up in hemisphere head 1 bottom center department, drain tube seat 4 sets up in hemisphere head 1 bottom and welds with hemisphere head 1, drain tube seat 4 communicates with each other with

hydrophobic hole

3, 5 one end of hydrophobic elbow welds with drain tube seat 4, and the other end welds with drain pipe 6.

The drain bag barrel 2 is provided with a drain temperature measuring point pipe seat 7 and a drain liquid level measuring pipe seat 8, and the drain temperature measuring point pipe seat 7 is higher than the drain liquid level measuring pipe seat 8.

And a first butt welding seam 9 is arranged at the bottom of the hemispherical seal head 1 and the bottom of the drain bag cylinder 2.

And a second butt welding seam 10 is arranged between the bottom of the hemispherical seal head 1 and the drain pipe seat 4.

And a third butt welding seam 11 is arranged between the drain pipe seat 4 and the drain elbow 5.

The central line of the horizontal pipe section of the drain elbow 5 and the central line of the original drain pipe base are on the same horizontal line, and the drain elbow 5 is a 90-degree drain elbow.

The specific implementation process of the high-temperature high-pressure pipeline drainage device comprises the following steps: firstly, arranging a drainage hole 3 at the bottom of a hemispherical head 1, and welding a first butt welding seam 9 between the hemispherical head 1 and a drainage bag cylinder 2; welding a second butt-joint welding seam 10 between the bottom of the hemispherical head 1 and the drain pipe seat 4, welding a third butt-joint welding seam 11 between the drain pipe seat 4 and the drain elbow 5, and then welding the drain pipeline 6 and the other end of the drain elbow 5; the opening of the drain valve is controlled according to the load of the unit or the drain temperature, so that the requirement of draining periodically is met.

On the basis of the prior art, the height of the hemispherical head 1 is higher than that of the original drain hole, and the drain hole 3 is arranged at the bottom of the hemispherical head 1, so that the drain hole 3 is arranged on one side of a drain bag, and the drain hole 3 is arranged at the bottom of the hemispherical head 1, so that condensed water can be drained without remaining; even if the drain valve is closed, the accumulated condensed water in the drain pipeline can only flow back to the vertical section of the drain elbow 5 at most and does not rise any more, because the pipeline is filled with the condensed water, the reheated steam can not enter the drain pipeline 6, the condensed water can not be generated, and the condensed water can only be formed in the vertical section of the drain elbow 5; because the wall thickness of the drain elbow 5 is thinner, effective heat preservation is carried out, and the temperature difference stress of the inner wall of the pipe around the condensed water surface can be completely ignored; the utility model has reasonable design and is worth popularizing.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a high temperature high pressure pipeline drainage device, includes hemisphere head (1), hydrophobic bag barrel (2), hydrophobic hole (3), drain tube socket (4), hydrophobic elbow (5), drain pipe (6), its characterized in that: hemisphere head (1) and hydrophobic bag barrel (2) bottom welding, hydrophobic hole (3) set up in hemisphere head (1) bottom center department, drain tube seat (4) set up in hemisphere head (1) bottom and with hemisphere head (1) welding, drain tube seat (4) communicate with each other with hydrophobic hole (3), hydrophobic elbow (5) one end and drain tube seat (4) welding, the other end and drain pipe (6) welding.

2. The high-temperature high-pressure pipeline drainage device according to claim 1, wherein: the drain bag is characterized in that a drain temperature measuring point pipe seat (7) and a drain liquid level measuring pipe seat (8) are arranged on the drain bag barrel body (2), and the drain temperature measuring point pipe seat (7) is higher than the drain liquid level measuring pipe seat (8).

3. The high-temperature high-pressure pipeline drainage device according to claim 2, wherein: and a first butt welding seam (9) is arranged at the bottom of the hemispherical seal head (1) and the bottom of the drain bag cylinder (2).

4. The high-temperature high-pressure pipeline drainage device according to claim 3, wherein: and a second butt welding seam (10) is arranged between the bottom of the hemispherical seal head (1) and the drain pipe seat (4).

5. The high-temperature high-pressure pipeline drainage device according to claim 4, wherein: and a third butt welding seam (11) is arranged between the drain pipe seat (4) and the drain elbow (5).

6. The high-temperature high-pressure pipeline drainage device according to claim 5, wherein: the central line of the horizontal pipe section of the drainage elbow (5) and the central line of the original drainage pipe base are on the same horizontal line, and the drainage elbow (5) is a 90-degree drainage elbow.