CN213177228U

CN213177228U - Parallel tee joint of ultra-high temperature prefabricated direct-buried heat-insulation pipe fitting

Info

Publication number: CN213177228U
Application number: CN202021958625.6U
Authority: CN
Inventors: 刘振立; 高立明; 刘红恩; 贾秋住
Original assignee: Beijing Huaneng Thermal Insulation Engineering Co ltd
Current assignee: Beijing Huaneng Thermal Insulation Engineering Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-05-11
Anticipated expiration: 2030-09-09

Abstract

The utility model relates to the technical field of pipelines, in particular to an ultra-high temperature prefabricated direct-buried heat-preservation pipe fitting parallel tee joint, it adopts a light-weight high-density polyethylene shell protective layer, is provided with a first polyurethane rigid foam heat-insulating layer, a high-temperature heat-reflecting coating layer and a second polyurethane rigid foam heat-insulating layer, is provided with a directly-buried heat-insulating corrugated compensator which is convenient for connecting pipelines and comprises a first seamless steel pipe, a second seamless steel pipe and a third seamless steel pipe, the top on the right side of the first seamless steel pipe is communicated with the bottom of the second seamless steel pipe, the bottom on the right side of the first seamless steel pipe is communicated with the top of the third seamless steel pipe, the first seamless steel pipe is fixedly connected with the second seamless steel pipe and the third seamless steel pipe, the first polyurethane rigid foam heat-insulating layer is fixedly connected with the outer portions of the first seamless steel pipe, the second seamless steel pipe and the third seamless steel pipe, and the high-temperature heat reflecting coating layer is fixedly connected with the outer portions of the first polyurethane rigid foam heat-insulating layer.

Description

Parallel tee joint of ultra-high temperature prefabricated direct-buried heat-insulation pipe fitting

Technical Field

The utility model relates to the technical field of pipelines, specifically be the parallel tee bend of prefabricated direct-burried heat preservation pipe fitting of ultra-temperature.

Background

As is known, the ultrahigh-temperature prefabricated direct-buried heat-insulating pipe not only has advanced technology and practical performance which are difficult to compare with the traditional trench and overhead laying pipeline, but also has remarkable social and economic benefits, and is a powerful measure for heat supply and energy conservation. The adoption of the direct burial heat supply pipeline technology marks that the development of the Chinese heat supply pipeline technology has entered a new starting point. With the further improvement and development of the advanced technology, the direct burial of the heat supply pipeline instead of the trench and the overhead potential is imperative.

The utility model discloses a chinese patent number is CN 206299937U's utility model discloses a parallel tee bend of prefabricated direct-burried heat preservation pipe fitting of ultra-temperature, it adopts the rock wool to seal the parcel at high temperature resistant pipeline outer wall, then adopt the aerogel felt to seal the parcel again in rock wool heat preservation outside, the thickness of sealing the parcel will be according to the aerogel heat insulation temperature who uses, calculate thickness to the heat preservation effect data of the highest gentle realization of pipeline, adopt the polyurethane spraying method to carry out rigid polyurethane spraying foaming at the aerogel outside at last, realize rigid polyurethane spraying and seal and keep warm, at last at the outside preparation metal protection layer of polyurethane, realize high temperature pipeline heat preservation.

The above prior art solutions still have the following drawbacks: it uses the weight of metal protection layer increase device, and construction and transportation are not convenient for, and it adopts the rock wool to keep warm, and the ignition point of rock wool is the lowest in heat preservation flame retardant material, can not get under the ultra-temperature environment, and the rock wool has tiny fibre in addition, and people inhales in a large number and easily harms the health, does not have leak hunting detection device.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides an adopt the light high density polyethylene shell protective layer of quality, be provided with first polyurethane rigid foam heat preservation, high temperature heat reflection dope layer and second polyurethane rigid foam heat preservation, be provided with the direct-burried heat preservation corrugated compensator who makes things convenient for the connecting tube, the prefabricated direct-burried heat preservation pipe fitting parallel tee bend of ultra-temperature of detectable leak source.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the parallel tee joint of the ultra-high temperature prefabricated direct-buried heat-insulation pipe fitting comprises a first seamless steel pipe, a second seamless steel pipe and a third seamless steel pipe, wherein the top end of the right side of the first seamless steel pipe is communicated with the bottom end of the second seamless steel pipe, the bottom end of the right side of the first seamless steel pipe is communicated with the top end of the third seamless steel pipe, the first seamless steel pipe, the second seamless steel pipe and the third seamless steel pipe are fixedly connected, the outer parts of the first seamless steel pipe, the second seamless steel pipe and the third seamless steel pipe are fixedly connected with a first polyurethane hard foam heat-insulation layer, the outer part of the first polyurethane hard foam heat-insulation layer is fixedly connected with a warm high-temperature heat-reflection coating layer, the outer part of the high-temperature heat-reflection coating layer is fixedly connected with a second polyurethane hard foam heat-insulation layer, a leakage alarm line is arranged in the first polyurethane hard foam heat-insulation layer, and the outer, and the left end of the first seamless steel pipe, the right end of the second seamless steel pipe and the right end of the third seamless steel pipe are fixedly connected with insulating flanges, and the other end of each insulating flange is connected with a direct-buried heat-preservation corrugated compensator through a bolt.

Preferably, a melt pressure sensor is fixedly connected to the left side of the top end inside the first seamless steel tube.

Preferably, an insulating pad is arranged between the insulating flange and the direct-buried corrugated compensator.

Preferably, the joints of the first seamless steel pipe, the second seamless steel pipe and the third seamless steel pipe are provided with radian chamfers.

Preferably, the thickness of the second polyurethane rigid foam insulation layer is smaller than that of the first polyurethane rigid foam insulation layer.

Preferably, the first seamless steel pipe, the second seamless steel pipe and the third seamless steel pipe have the same pipe diameter.

(III) advantageous effects

Compared with the prior art, the utility model provides a parallel tee bend of prefabricated direct-burried heat preservation pipe fitting of ultra-temperature possesses following beneficial effect:

the ultra-high temperature prefabricated direct-buried heat preservation pipe fitting parallel tee joint can preserve heat of heat emitted by a first seamless steel pipe, a second seamless steel pipe and a third seamless steel pipe by arranging a first polyurethane rigid foam heat preservation layer, can reflect the heat penetrating through the first polyurethane rigid foam heat preservation layer to perform high heat insulation effect by arranging a high temperature heat reflection coating layer, can insulate and isolate cold transmitted through a high density polyethylene shell protection layer by arranging a second polyurethane rigid foam heat preservation layer, can reflect the cold penetrating through the first polyurethane rigid foam heat preservation layer to perform high cold insulation effect, can detect leakage of the first seamless steel pipe, the second seamless steel pipe and the third seamless steel pipe by arranging a leakage alarm line, and transmits a position signal of a dew point to a pipeline supervision system, through setting up that high density polyethylene shell protective layer corrosion resisting property is good, insulating properties is good and mechanical properties is good, carry out fine protection to first seamless steel pipe, second seamless steel pipe and third seamless steel pipe, density is little and does not increase the weight of device.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic cross-sectional view taken along a-a of fig. 1 according to the present invention;

fig. 3 is a schematic diagram of a partially enlarged structure at B in fig. 2 according to the present invention.

In the figure: 1. a first seamless steel tube; 2. a second seamless steel tube; 3. a third seamless steel pipe; 4. a first polyurethane rigid foam insulation layer; 5. a high temperature heat reflective coating layer; 6. a second polyurethane rigid foam insulation layer; 7. a leakage alarm line; 8. a high density polyethylene outer shell protective layer; 9. an insulating flange; 10. a direct-buried thermal insulation corrugated compensator; 11. a melt pressure sensor; 12. an insulating pad.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-3, the ultra-high temperature prefabricated direct-burial heat-preservation pipe parallel tee comprises a first seamless steel pipe 1, a second seamless steel pipe 2 and a third seamless steel pipe 3, wherein the top end of the right side of the first seamless steel pipe 1 is communicated with the bottom end of the second seamless steel pipe 2, the bottom end of the right side of the first seamless steel pipe 1 is communicated with the top end of the third seamless steel pipe 3, the first seamless steel pipe 1, the second seamless steel pipe 2 and the third seamless steel pipe 3 are fixedly connected, the first polyurethane rigid foam heat-preservation layer 4 is fixedly connected to the outer portions of the first seamless steel pipe 1, the second seamless steel pipe 2 and the third seamless steel pipe 3, the first polyurethane rigid foam heat-preservation layer 4 can preserve heat emitted by the first seamless steel pipe 1, the second seamless steel pipe 2 and the third seamless steel pipe 3, the high-temperature heat-reflection coating layer 5 is fixedly connected to the outer portion of the first polyurethane rigid foam heat-preservation layer 4, the high-temperature heat reflection coating layer 5 can reflect heat penetrating through the first polyurethane hard foam heat preservation layer 4 to perform a very high heat insulation effect, the outside of the high-temperature heat reflection coating layer 5 is fixedly connected with a second polyurethane hard foam heat preservation layer 6, the second polyurethane hard foam heat preservation layer 6 can insulate and isolate cold energy transmitted through the high-density polyethylene shell protection layer 8, the high-temperature heat reflection coating layer 5 can reflect cold energy penetrating through the first polyurethane hard foam heat preservation layer 4 to perform a very high cold insulation effect, a leakage alarm line 7 is arranged in the first polyurethane hard foam heat preservation layer 4, leakage detection can be performed on the first seamless steel pipe 1, the second seamless steel pipe 2 and the third seamless steel pipe 3, a position signal is transmitted to a pipeline supervision system, the outside of the second polyurethane hard foam heat preservation layer 6 is fixedly connected with the high-density polyethylene shell protection layer 8, carry out fine protection to first seamless steel pipe 1, second seamless steel pipe 2 and third seamless steel pipe 3, high density polyethylene shell protective layer 8 corrosion resisting property is good, insulating properties is good and mechanical properties is good, the left end of first seamless steel pipe 1, the equal fixedly connected with insulating flange 9 of right-hand member of second seamless steel pipe 2 and the right-hand member of third seamless steel pipe 3, the other end of every insulating flange 9 all has direct-burried heat preservation ripple compensator 10 through bolted connection, convenient and other pipeline's connection.

It should be further noted that, the top left side fixedly connected with fuse-element pressure sensor 11 of the inside of first seamless steel pipe 1, can detect the pressure of the gas or liquid in first seamless steel pipe 1, guarantee within the pressure-bearing range of first seamless steel pipe, be provided with insulating pad 12 between insulating flange 9 and the direct-burried corrugated compensator, make the connection inseparabler, the junction of first seamless steel pipe 1 and second seamless steel pipe 2 and third seamless steel pipe 3 all is provided with the radian chamfer, make inside gas or liquid be more convenient for reposition of redundant personnel or confluence, the thickness of second polyurethane rigid foam heat preservation 6 is less than the thickness of first polyurethane rigid foam heat preservation 4, the pipe diameters of first seamless steel pipe 1, second seamless steel pipe 2 and third seamless steel pipe 3 are unanimous.

In conclusion, the working principle and the working process of the parallel tee joint of the ultra-high temperature prefabricated direct-buried heat-insulating pipe fitting are that the first polyurethane rigid foam heat-insulating layer 4 can insulate heat emitted by the first seamless steel pipe 1, the second seamless steel pipe 2 and the third seamless steel pipe 3, the high-temperature heat-reflecting coating layer 5 can reflect heat penetrating through the first polyurethane rigid foam heat-insulating layer 4 to perform high heat-insulating function, the second polyurethane rigid foam heat-insulating layer 6 can insulate and isolate cold transmitted through the high-density polyethylene shell protective layer 8, the high-temperature heat-reflecting coating layer 5 can reflect cold penetrating through the first polyurethane rigid foam heat-insulating layer 4 to perform high cold-insulating function, the leakage alarm line 7 can detect leakage of the first seamless steel pipe 1, the second seamless steel pipe 2 and the third seamless steel pipe 3 and transmit a position signal of a dew point to a pipeline supervision system, the high-density polyethylene shell protective layer 8 has good corrosion resistance, good insulating property and good mechanical property, and can well protect the first seamless steel pipe 1, the second seamless steel pipe 2 and the third seamless steel pipe 3.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The parallel tee joint of prefabricated direct-burried heat preservation pipe fitting of ultra-high temperature includes first seamless steel pipe (1), second seamless steel pipe (2) and third seamless steel pipe (3), its characterized in that: the top end of the right side of the first seamless steel pipe (1) is communicated with the bottom end of the second seamless steel pipe (2), the bottom end of the right side of the first seamless steel pipe (1) is communicated with the top end of the third seamless steel pipe (3), the first seamless steel pipe (1), the second seamless steel pipe (2) and the third seamless steel pipe (3) are fixedly connected, the outer parts of the first seamless steel pipe (1), the second seamless steel pipe (2) and the third seamless steel pipe (3) are fixedly connected with a first polyurethane hard foam heat-insulating layer (4), the outer part of the first polyurethane hard foam heat-insulating layer (4) is fixedly connected with a high-temperature heat reflecting coating layer (5), the outer part of the high-temperature heat reflecting coating layer (5) is fixedly connected with a second polyurethane hard foam heat-insulating layer (6), a leakage alarm line (7) is arranged in the first polyurethane hard foam heat-insulating layer (4), the outer part of the second polyurethane hard foam heat-insulating layer (6) is fixedly connected with a, the left end of the first seamless steel pipe (1), the right end of the second seamless steel pipe (2) and the right end of the third seamless steel pipe (3) are fixedly connected with insulating flanges (9), and the other end of each insulating flange (9) is connected with a directly-buried heat-preservation corrugated compensator (10) through bolts.

2. The ultra-high temperature prefabricated direct-burried heat preservation pipe fitting parallel tee bend of claim 1, characterized in that: the left side of the top end of the interior of the first seamless steel pipe (1) is fixedly connected with a melt pressure sensor (11).

3. The ultra-high temperature prefabricated direct-burried heat preservation pipe fitting parallel tee of claim 2, characterized in that: and an insulating pad (12) is arranged between the insulating flange (9) and the direct-buried corrugated compensator.

4. The ultra-high temperature prefabricated direct-burried heat preservation pipe fitting parallel tee of claim 3, characterized in that: and the joints of the first seamless steel pipe (1), the second seamless steel pipe (2) and the third seamless steel pipe (3) are provided with radian chamfers.

5. The ultra-high temperature prefabricated direct-burried heat preservation pipe fitting parallel tee of claim 4, characterized in that: the thickness of the second polyurethane rigid foam heat-insulating layer (6) is smaller than that of the first polyurethane rigid foam heat-insulating layer (4).

6. The ultra-high temperature prefabricated direct-burried heat preservation pipe fitting parallel tee bend of claim 5, characterized in that: the pipe diameters of the first seamless steel pipe (1), the second seamless steel pipe (2) and the third seamless steel pipe (3) are consistent.