Pipeline compensator for heat compensation of heat supply pipeline

Abstract

The utility model relates to a pipeline compensator for heat compensation of a heat supply pipeline, which aims to solve the technical problem that the service life of the current metal corrugated compensator is shortened due to the fact that the current metal corrugated compensator is prone to overfatigue. The matching structure comprises a first sleeve and a second sleeve, the first sleeve is arranged at a port of the metal corrugated compensator, a displacement cavity is formed in the first sleeve, the second sleeve is arranged in the displacement cavity in a sliding mode, and the end, opposite to the metal corrugated compensator, of the second sleeve extends to the outer side of the first sleeve. A third sleeve is arranged at a port, facing the metal ripple compensator, of the displacement cavity, and one end, back to the metal ripple compensator, of the third sleeve extends into the second sleeve, so that the situation that the service life of the metal ripple compensator is shortened due to the fact that thermal compensation of the metal ripple compensator exceeds a limit value and overfatigue occurs can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline compensators, in particular to a pipeline compensator for thermal compensation of a heating pipeline. Background Art

[0002] Pipeline compensators are also called expansion joints or expansion joints. They are mainly used to compensate for the thermal expansion and contraction of pipelines caused by temperature changes. If the pipeline cannot expand or contract completely freely when the temperature changes, thermal stress will be generated in the pipeline. This stress must be considered in the pipeline design, otherwise it may cause the pipeline to rupture and affect the normal production. As an important part of pipeline engineering, compensators play an important role in ensuring the long-term normal operation of pipelines. Metal corrugated compensators are a common type of pipeline compensators.

[0003] The existing metal corrugated compensator realizes the thermal expansion change of the heating pipe by the expansion and contraction of the corrugations. The expansion and contraction degree of the corrugations is limited, resulting in a relatively small compensation range of the metal corrugated compensator. During use, if the heating pipe expands too much due to heat, it is easy to cause the expansion and contraction deformation of the metal corrugated compensator to exceed its limit, thereby causing excessive fatigue of the metal corrugated compensator and shortening the service life of the metal corrugated compensator. In view of this, we propose a pipe compensator for thermal compensation of heating pipes. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, meet actual needs, and provide a pipe compensator for thermal compensation of a heating pipe to solve the technical problem that the current metal corrugated compensator is prone to excessive fatigue and thus shortens its service life.

[0005] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is as follows: a pipe compensator for heat compensation of a heating pipe is designed, including a metal corrugated compensator, both ports of the metal corrugated compensator are arranged with a matching structure, the matching structure includes a first sleeve and a second sleeve, the first sleeve is arranged at the port of the metal corrugated compensator, a displacement cavity is arranged inside the first sleeve, the second sleeve is slidably arranged in the displacement cavity, and the end of the second sleeve facing away from the metal corrugated compensator extends to the outside of the first sleeve;

[0006] A third sleeve is arranged at the port of the displacement cavity facing the metal corrugated compensator, and one end of the third sleeve facing away from the metal corrugated compensator extends into the second sleeve. A sealing structure is arranged at one end of the third sleeve located inside the second sleeve.

[0007] Preferably, the sealing structure comprises a ring, which is fixedly arranged on the third sleeve, the inner diameter of the ring is the same as the diameter of the third sleeve, and the inner diameter of the ring is the same as the diameter of the inner diameter of the second sleeve.

[0008] Preferably, the collar is provided with a plurality of groups of open grooves at equal intervals around a circumference, and sealing rings are arranged inside the open grooves.

[0009] Preferably, the end of the second sleeve facing the metal corrugated compensator is a T-shaped end, and the T-shaped end of the second sleeve is located in the displacement cavity.

[0010] Preferably, a flange is arranged at one end of the second sleeve facing away from the metal corrugated compensator, and a plurality of groups of threaded holes are equidistantly formed around the flange.

[0011] Preferably, the flange is provided with several groups of limit rods equidistantly arranged toward one side of the metal corrugated compensator, and the limit rods are staggered with the threaded holes, a welding ring is arranged at one end of the first sleeve facing away from the metal corrugated compensator, and through holes corresponding to the limit rods are opened around the welding ring, and the limit rods pass through the through holes.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The two ports of the metal bellows compensator of the utility model are provided with a matching structure. The second sleeve in the matching structure can be displaced forward and backward to a certain extent inside the first sleeve. Therefore, the matching metal bellows compensator can greatly increase the thermal compensation range of the heating pipe, and can effectively avoid the situation where the thermal compensation of the heating pipe by the metal bellows compensator exceeds the limit. Therefore, the utility model can avoid the situation where the thermal compensation of the metal bellows compensator exceeds the limit and becomes excessively fatigued, thereby shortening its service life.

[0014] 2. The utility model provides a third sleeve at a group of ports of the displacement chamber inside the first sleeve, the third sleeve extends into the interior of the second sleeve, and one end of the third sleeve extending into the interior of the second sleeve is sealed by a sealing structure. Therefore, during the displacement of the second sleeve in the displacement chamber, the third sleeve can seal and isolate the displacement chamber, thereby preventing the heat material transported in the heating pipeline from contacting the displacement chamber when flowing through the device, causing scaling or contamination in the displacement chamber, thereby ensuring that the second sleeve can be smoothly displaced in the displacement chamber of the first sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the matching structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the first sleeve of the utility model;

[0018] Figure 4 This is a schematic diagram of the second sleeve structure of the utility model;

[0019] Figure 5 It is a cross-sectional schematic diagram of the sealing structure of the utility model.

[0020] In the figure: 1. Metal corrugated compensator; 2. Matching structure; 3. First sleeve; 301. Displacement cavity; 302. Welding ring; 303. Through hole; 4. Second sleeve; 401. Flange; 402. Threaded hole; 403. Limit rod; 5. Third sleeve; 6. Sealing structure; 601. Ring; 602. Open groove; 603. Sealing ring. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0022] Embodiment: A pipe compensator for heat compensation of a heating pipe, see Figures 1 to 5 , including a metal corrugated compensator 1, both ports of the metal corrugated compensator 1 are arranged with a matching structure 2, the matching structure 2 includes a first sleeve 3 and a second sleeve 4, the first sleeve 3 is arranged at the port of the metal corrugated compensator 1, a displacement cavity 301 is arranged inside the first sleeve 3, the second sleeve 4 is slidably arranged in the displacement cavity 301, and the second sleeve 4 extends to the outside of the first sleeve 3 at one end facing away from the metal corrugated compensator 1. When thermally compensating the heating pipeline, the two groups of second sleeves 4 are directly connected to the pipeline respectively, and then the second sleeve 4 in the matching structure 2 can be displaced forward and backward to a certain extent inside the displacement cavity 301 of the first sleeve 3. Therefore, the matching metal corrugated compensator 1 can greatly increase the thermal compensation range of the heating pipeline, and can effectively avoid the situation where the metal corrugated compensator 1 exceeds the limit value for the thermal compensation of the heating pipeline. Therefore, the utility model can avoid the situation where the metal corrugated compensator 1 exceeds the limit value for thermal compensation and becomes excessively fatigued, thereby shortening its service life.

[0023] Specifically, the end of the second sleeve 4 facing the metal corrugated compensator 1 is a T-shaped end, and the T-shaped end of the second sleeve 4 is located in the displacement cavity 301, which can ensure that the second sleeve 4 will not be separated from the displacement cavity 301 when the displacement cavity 301 is displaced.

[0024] Furthermore, a flange 401 is arranged at one end of the second sleeve 4 facing away from the metal corrugated compensator 1, and a plurality of groups of threaded holes 402 are equidistantly provided around the flange 401. The flange 401 is used for docking with the heating pipe, and the threaded holes 402 facilitate the installation of the flanges 401 by bolt connection.

[0025] Furthermore, a plurality of groups of limit rods 403 are equidistantly arranged on the flange 401 toward one side of the metal corrugated compensator 1, and the limit rods 403 are staggered with the threaded holes 402. A welding ring 302 is arranged at one end of the first sleeve 3 facing away from the metal corrugated compensator 1, and a through hole 303 corresponding to the limit rod 403 is opened around the welding ring 302, and the limit rod 403 passes through the through hole 303. The limit rod 403 can be displaced in the through hole 303 of the welding ring 302 together with the second sleeve 4, so as to ensure the stability of the displacement of the second sleeve 4.

[0026] In a specific embodiment, a third sleeve 5 is arranged at the port of the displacement chamber 301 facing the metal corrugated compensator 1, and one end of the third sleeve 5 facing away from the metal corrugated compensator 1 extends into the second sleeve 4. A sealing structure 6 is arranged at one end of the third sleeve 5 located inside the second sleeve 4. During the displacement of the second sleeve 4 in the displacement chamber 301, the third sleeve 5 can seal and isolate the displacement chamber 301, thereby preventing the heat material transported in the heating pipeline from contacting the displacement chamber 301 when flowing through the device, thereby preventing scaling or contamination from occurring in the displacement chamber 301, thereby ensuring that the second sleeve 4 can be smoothly displaced in the displacement chamber 301 of the first sleeve 3.

[0027] Specifically, the sealing structure 6 includes a ring 601, which is fixedly arranged on the third sleeve 5. The inner diameter of the ring 601 is the same as the diameter of the third sleeve 5 and the inner diameter of the second sleeve 4. The ring 601 is used to assist in the installation of the sealing ring 603.

[0028] Furthermore, a plurality of groups of open grooves 602 are equidistantly provided around the ring 601, and a sealing ring 603 is arranged inside the open groove 602. After the sealing ring 603 is installed in the open groove 602, the sealing of the third sleeve 5 and the second sleeve 4 is achieved; the utility model solves the technical problem that the current metal corrugated compensator 1 is prone to excessive fatigue and its service life is shortened through the matching structure 2.

[0029] Working principle: When performing thermal compensation on the heating pipeline, firstly, directly connect the two sets of second sleeves 4 to the pipeline respectively, and then the second sleeve 4 in the matching structure 2 can be displaced forward and backward to a certain extent inside the displacement cavity 301 of the first sleeve 3, so the matching metal corrugated compensator 1 can greatly increase the thermal compensation range of the heating pipeline, and can effectively avoid the situation that the thermal compensation of the heating pipeline by the metal corrugated compensator 1 exceeds the limit value. Therefore, the utility model can avoid the situation that the thermal compensation of the metal corrugated compensator 1 exceeds the limit value and becomes excessively fatigued, thereby shortening its service life;

[0030] Secondly, during the displacement of the second sleeve 4 in the displacement chamber 301, the third sleeve 5 can seal and isolate the displacement chamber 301, thereby preventing the heat material transported in the heating pipeline from contacting the displacement chamber 301 when flowing through the device, thereby preventing scaling or contamination from occurring in the displacement chamber 301, thereby ensuring that the second sleeve 4 can be smoothly displaced in the displacement chamber 301 of the first sleeve 3.

[0031] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A pipe compensator for heat compensation of a heating pipe, characterized in that: The invention comprises a metal corrugated compensator (1), wherein both ends of the metal corrugated compensator (1) are provided with a matching structure (2), wherein the matching structure (2) comprises a first sleeve (3) and a second sleeve (4), wherein the first sleeve (3) is arranged at the end of the metal corrugated compensator (1), wherein a displacement cavity (301) is arranged inside the first sleeve (3), and wherein the second sleeve (4) is slidably arranged in the displacement cavity (301), and wherein an end of the second sleeve (4) facing away from the metal corrugated compensator (1) extends to the outside of the first sleeve (3); The displacement cavity (301) is provided with a third sleeve (5) facing the port of the metal bellows compensator (1); one end of the third sleeve (5) facing away from the metal bellows compensator (1) extends into the interior of the second sleeve (4); and one end of the third sleeve (5) located inside the second sleeve (4) is provided with a sealing structure (6).

2. A pipe compensator for heat compensation of a heating pipe as claimed in claim 1, characterized in that: The sealing structure (6) comprises a collar (601), wherein the collar (601) is fixedly arranged on the third sleeve (5), the inner diameter of the collar (601) is the same as the diameter of the third sleeve (5), and the diameter of the collar (601) is the same as the inner diameter of the second sleeve (4).

3. A pipe compensator for heat compensation of a heating pipe as claimed in claim 2, characterized in that: The collar (601) is provided with a plurality of groups of open grooves (602) at equal intervals around a circumference, and a sealing ring (603) is arranged inside the open groove (602).

4. A pipe compensator for heat compensation of a heating pipe as claimed in claim 1, characterized in that: One end of the second sleeve (4) facing the metal corrugated compensator (1) is a T-shaped end, and the T-shaped end of the second sleeve (4) is located in the displacement cavity (301).

5. A pipe compensator for heat compensation of a heating pipe as claimed in claim 1, characterized in that: A flange (401) is arranged at one end of the second sleeve (4) facing away from the metal corrugated compensator (1), and a plurality of groups of threaded holes (402) are equidistantly provided around the flange (401).

6. A pipe compensator for heat compensation of a heating pipe as claimed in claim 5, characterized in that: The flange (401) is provided with a plurality of groups of limit rods (403) equidistantly arranged on one side of the metal corrugated compensator (1), and the limit rods (403) are staggered with the threaded holes (402); a welding ring (302) is arranged on one end of the first sleeve (3) facing away from the metal corrugated compensator (1), and a through hole (303) corresponding to the limit rod (403) is formed around the welding ring (302), and the limit rod (403) passes through the through hole (303).

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