CN215928839U

CN215928839U - Self-cold-insulation compensator for low-temperature pipeline

Info

Publication number: CN215928839U
Application number: CN202122191156.0U
Authority: CN
Inventors: 王晓伟; 杨清; 祁鲁海; 吴涛; 陈磊; 刘旭
Original assignee: Jiangsu Xintai Chemical Equipment Co ltd
Current assignee: Jiangsu Xintai Chemical Equipment Co ltd; Sinopec Guangzhou Engineering Co Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-03-01
Anticipated expiration: 2031-09-10

Abstract

The utility model discloses a self-cold-insulation compensator for a low-temperature pipeline, which comprises a shell and a connecting mechanism, wherein the connecting mechanism is arranged on the shell and comprises an inlet end connecting pipe, two PIR cold-insulation assemblies, a first cold-insulation sleeve, an inner-layer corrugated pipe, a pull rod assembly, an outer-layer corrugated pipe, an electric tracing assembly, a second cold-insulation sleeve and an outlet end connecting pipe. The self-cold-insulation compensator for the low-temperature pipeline is realized by mutual matching of the shell, the inlet end connecting pipe, the PIR cold-insulation component, the first cold-insulation sleeve pipe, the inner-layer corrugated pipe, the pull rod component, the outer-layer corrugated pipe, the electric heat tracing component, the second cold-insulation sleeve pipe, the outlet end connecting pipe, the connecting pipe flange, the vacuumizing port, the electric heat tracing interface, the pressure gauge interface and the standby port, and the cold-insulation compensator for the low-temperature pipeline can effectively reduce the cold loss of the pipeline and prolong the service life of the compensator on the premise of ensuring that the compensator meets the use requirements of design working conditions, thereby improving the practicability and bringing great convenience to users.

Description

Self-cold-insulation compensator for low-temperature pipeline

Technical Field

The utility model relates to the technical field of self-refrigerating compensators, in particular to a self-refrigerating compensator for a low-temperature pipeline.

Background

From cold-proof compensator is applied to the cryogenic conduit usually, but the cold loss volume of the unable effectual reduction pipeline of common self cold-proof compensator, long-time use causes the influence to the life of compensator easily moreover to greatly reduced the practicality, brought very big inconvenience for the user, for this reason, we provide a cryogenic conduit with from cold-proof compensator.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a self-cooling compensator for cryogenic pipelines to solve the above-mentioned problems.

In order to achieve the purpose, the utility model provides the following technical scheme: a self-refrigerating compensator for a low-temperature pipeline comprises a shell and a connecting mechanism, wherein the connecting mechanism is arranged on the shell;

coupling mechanism includes that entry end pipe, two PIRs separate cold subassembly, first cold sleeve pipe, inlayer bellows, pull rod assembly, outer bellows, electric heat tracing subassembly, second separate cold sleeve pipe and exit end takeover, entry end pipe sets up the left side at the casing, first separate cold sleeve pipe sets up on the casing, inlayer bellows sets up on the casing, pull rod assembly sets up the position between two PIRs separate cold subassemblies, and outer bellows sets up the top at the casing, electric heat tracing subassembly sets up the top at the casing, second separate cold sleeve pipe sets up on the casing, exit end pipe sets up the right side at the casing.

Preferably, the left and right sides at casing top and the position that corresponds pull rod assembly all install the flange of taking over, the flange of taking over is close to the PIR and separates cold one side of subassembly and contact each other with the PIR and separate cold subassembly, flange of taking over, PIR separate cold subassembly, first separate cold sleeve pipe, second separate cold sleeve pipe and outer bellows formation independent cavity.

Preferably, the front surface of the shell is provided with a vacuum pumping port.

Preferably, the top of the shell is provided with an electric heat tracing interface corresponding to the position of the electric heat tracing assembly.

Preferably, a pressure gauge interface is arranged on the right side of the front face of the shell.

Preferably, the bottom of the housing is provided with a spare port.

Compared with the prior art, the utility model has the following beneficial effects:

the self-cold-insulation compensator for the low-temperature pipeline is realized by mutual matching of the shell, the inlet end connecting pipe, the PIR cold-insulation component, the first cold-insulation sleeve pipe, the inner-layer corrugated pipe, the pull rod component, the outer-layer corrugated pipe, the electric heat tracing component, the second cold-insulation sleeve pipe, the outlet end connecting pipe, the connecting pipe flange, the vacuumizing port, the electric heat tracing interface, the pressure gauge interface and the standby port, and the cold-insulation compensator for the low-temperature pipeline can effectively reduce the cold loss of the pipeline and prolong the service life of the compensator on the premise of ensuring that the compensator meets the use requirements of design working conditions, thereby improving the practicability and bringing great convenience to users.

Drawings

FIG. 1 is a structural cross-sectional view in elevation of the present invention;

FIG. 2 is a cross-sectional structural view in elevation of a PIR cold insulation assembly, a first cold insulation sleeve, a piping flange, and a tie rod assembly of the present invention;

FIG. 3 is a first schematic of experimental data for a self-refrigerating compensator according to the present invention;

FIG. 4 is a second graphical representation of experimental data for a self-refrigerating compensator according to the present invention.

In the figure: 100 shells, 11 connecting mechanisms, 1 inlet end connecting pipe, 2 PIR cold insulation components, 3 first cold insulation sleeves, 4 inner layer corrugated pipes, 5 pull rod components, 6 outer layer corrugated pipes, 7 electric heat tracing components, 8 second cold insulation sleeves, 9 outlet end connecting pipes, 21 connecting pipe flanges, 22 vacuumizing ports, 23 electric heat tracing ports, 24 pressure gauge ports and 25 spare ports.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a self-cooling compensator for cryogenic pipelines includes a housing 100 and a connection mechanism 11, wherein the connection mechanism 11 is disposed on the housing 100.

The connecting mechanism 11 comprises an inlet end connecting pipe 1, two PIR cold insulation components 2, a first cold insulation sleeve 3, an inner layer corrugated pipe 4, a pull rod component 5, an outer layer corrugated pipe 6, an electric heat tracing component 7, a second cold insulation sleeve 8 and an outlet end connecting pipe 9, wherein the inlet end connecting pipe 1 is arranged on the left side of the shell 100, the first cold insulation sleeve 3 is arranged on the shell 100, the inner layer corrugated pipe 4 is arranged on the shell 100, the pull rod component 5 is arranged at a position between the two PIR cold insulation components 2, the outer layer corrugated pipe 6 is arranged on the top of the shell 100, the electric heat tracing component 7 is arranged on the top of the shell 100, the second cold insulation sleeve 8 is arranged on the shell 100, the outlet end connecting pipe 9 is arranged on the right side of the shell 100, connecting pipe flanges 21 are respectively arranged on the left side and the right side of the top of the shell 100 and corresponding to the positions of the pull rod component 5, one side, close to the PIR cold insulation component 2, of the connecting flange 21 is mutually contacted with the cold insulation components 2, the pipe connecting flange 21, the PIR cold insulation component 2, the first cold insulation sleeve 3, the second cold insulation sleeve 8 and the outer corrugated pipe 6 form an independent cavity, the front surface of the shell 100 is provided with a vacuumizing port 22, the top of the shell 100 is provided with an electric heat tracing interface 23 corresponding to the electric heat tracing component 7, the right side of the front surface of the shell 100 is provided with a pressure gauge interface 24, the bottom of the shell 100 is provided with a spare port 25, the left side of the inlet end connecting pipe 1 is provided with a medium inlet, the right side of the outlet end connecting pipe 9 is provided with a second pressure gauge interface, the top of the right side of the outlet end connecting pipe 9 is provided with a vent, the bottom of the right side of the outlet end connecting pipe 9 is provided with a thermometer interface, the first cold insulation sleeve 3 and the pipe connecting flange 21 are processed into a convex sealing surface, the tight fit between the PIR cold insulation component 2 and the flange sealing surface is facilitated, the sealing performance of the cavity is ensured, and the pipeline is used for spare, when the standby pipeline is in a non-working state, the standby pipeline is easy to condense into solid medium ice sand and slurry, electric tracing is turned on to heat the pipeline before the pipeline is restarted, the electric tracing is turned off after the pipeline is started, the medium can be ensured to normally circulate, industrial alcohol is used as the medium in the test process, liquid nitrogen is used for cooling to simulate a low-temperature working condition, the medium flows to a vent from a medium inlet, a thermometer on a thermometer interface monitors the temperature in a pipeline, a pressure gauge on an outlet end connecting pipe 9 monitors the pressure in the pipeline, PIR (polyisocyanurate) material is added between a connecting pipe flange 21 and a first cold insulation sleeve 3 and a second cold insulation sleeve 8 because the medium absorbs heat through structural parts such as a flange directly connected with the pipeline in the test process, the heat conductivity coefficient of the common carbon steel material is about 48[ W (m.K) ^ 1], therefore, PIR (polyisocyanurate) material is added between the connecting pipe flange 21 and the first cold insulation sleeve 3 and the second cold insulation sleeve 8, the heat conductivity coefficient of the PIR material is less than or equal to 0.019 (7 ℃) [ W (m.K) ^ 1, the heat absorption of the low-temperature medium circulation pipeline from the surrounding environment can be effectively reduced after the PIR material is added, and the cold loss in the low-temperature pipeline is reduced, as shown in figure 3, the temperature of the inner cavity is kept for 30min after the temperature of the inner cavity is stabilized, the temperature change rate of the inner cavity of the compensator is calculated to be 1.4 ℃/h through the data of the following table, as shown in figure 4, the temperature change rate of the inner cavity of the compensator is calculated to be 1.6 ℃/h through the data of the following table after the temperature of the inner cavity is stabilized, and the self-insulation compensator for the low-temperature pipeline is realized through the mutual matching of the shell 100, the inlet end connecting pipe 1, the PIR cold insulation component 2, the first cold insulation sleeve 3, the inner corrugated pipe 4, the pull rod component 5, the outer corrugated pipe 6, the electric heat tracing component 7, the second cold insulation sleeve 8, the outlet end 9, the connecting pipe flange 21, the vacuum pumping port 22, the electric heat tracing interface 23, the pressure gauge interface 24 and the standby port 25, and under the prerequisite of guaranteeing that the compensator satisfies the design operating mode and use, can effectual reduction pipeline's cold loss volume, the life of extension compensator to improve the practicality, brought very big facility for the user.

When the vacuum-pumping device is used, a sealed cavity between the inner-layer corrugated pipe 4 and the outer-layer corrugated pipe 6 is subjected to vacuum-pumping treatment in advance through the vacuum-pumping port 22 before a test, when a pressure vacuum meter arranged on the pressure gauge port 24 reaches a negative pressure state and the dial pointer index is not reduced, the pressure vacuum state is reached, the heat conductivity coefficient of dry air is 0.025[ W (m.K) ^ -1] when the ambient temperature is 0 ℃, when the vacuum state in the cavity is approached, the content of air is also approached to 0, and the heat conductivity coefficient of residual air is lower at the moment, so that the heat absorbed by a low-temperature medium circulation pipeline from the ambient environment can be effectively reduced, and the cold loss in the low-temperature pipeline is greatly reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A self-refrigerating compensator for cryogenic pipelines, comprising a housing (100) and a connection mechanism (11), characterized in that: the connecting mechanism (11) is arranged on the shell (100);

the connecting mechanism (11) comprises an inlet end connecting pipe (1), two PIR cold insulation assemblies (2), a first cold insulation sleeve (3), an inner layer corrugated pipe (4), a pull rod assembly (5), an outer layer corrugated pipe (6), an electric tracing assembly (7), a second cold insulation sleeve (8) and an outlet end connecting pipe (9), the inlet end connecting pipe (1) is arranged on the left side of the shell (100), the first cold insulation sleeve (3) is arranged on the shell (100), the inner layer corrugated pipe (4) is arranged on the shell (100), the pull rod assembly (5) is arranged between the two PIR cold insulation assemblies (2), the outer layer corrugated pipe (6) is arranged at the top of the shell (100), the electric heat tracing assembly (7) is arranged at the top of the shell (100), the second cold insulation sleeve (8) is arranged on the shell (100), and the outlet end pipe (9) is arranged on the right side of the shell (100).

2. The self-refrigerating compensator for cryogenic pipelines according to claim 1, wherein: the left and right sides at casing (100) top and the position that corresponds pull rod subassembly (5) all install flange of taking over a pipe (21), flange of taking over a pipe (21) are close to the PIR and separate one side of cold subassembly (2) and PIR and separate cold subassembly (2) and contact each other, flange of taking over a pipe (21), PIR separate cold subassembly (2), first separate cold sleeve pipe (3), second separate cold sleeve pipe (8) and outer bellows (6) formation independent cavity.

3. The self-refrigerating compensator for cryogenic pipelines according to claim 2, wherein: the front surface of the shell (100) is provided with a vacuumizing port (22).

4. The self-refrigerating compensator for cryogenic pipelines according to claim 3, wherein: an electric tracing interface (23) is arranged at the top of the shell (100) and corresponds to the position of the electric tracing assembly (7).

5. The self-refrigerating compensator for cryogenic pipelines according to claim 4, wherein: and a pressure gauge interface (24) is arranged on the right side of the front surface of the shell (100).

6. The self-refrigerating compensator for cryogenic pipelines according to claim 5, wherein: the bottom of the shell (100) is provided with a standby port (25).