CN210978986U - Polyurethane prefabricated direct-buried insulating pipe - Google Patents

Abstract

The utility model relates to the technical field of thermal insulation pipes, and discloses a polyurethane prefabricated directly buried thermal insulation pipe, which comprises a steel pipe. The outer side of the steel pipe is fixedly installed with a heat insulation layer, the outer side of the heat insulation layer is fixedly installed with a polyurethane insulation layer, the outer side of the polyurethane insulation layer is fixedly installed with an external anti-corrosion layer, and the left and right sides of the steel pipe are fixedly installed with A connection port, the inner cavity of the connection port is provided with a water stop strip. The polyurethane prefabricated direct-buried thermal insulation pipe is used to prevent the internal temperature of the pipeline from being lost to the outside through the use of the thermal insulation layer. At the same time, through the use of the thermal insulation layer, the pipeline is wrapped with the polyurethane thermal insulation layer to prevent the external cold air from entering the inside of the pipeline. At the same time, the use of thermal insulation The aerogel between the layer and the internal anti-corrosion layer can improve the thermal insulation effect of the thermal insulation layer, ensure the good thermal insulation effect of the pipeline, and prevent the heat loss of the liquid during the transmission process.

Description

A kind of polyurethane prefabricated directly buried thermal insulation pipe

technical field

The utility model relates to the technical field of thermal insulation pipes, in particular to a polyurethane prefabricated directly buried thermal insulation pipe.

Background technique

Thermal insulation pipe is the abbreviation of thermal insulation pipeline. Thermal insulation pipe is used for the transportation of liquid, gas and other media, and is widely used in thermal insulation projects of petroleum, chemical, aerospace, municipal and other pipelines.

The structure of the existing insulation pipe is generally simple, with only the inner steel pipe, the outer protection pipe and the middle insulation layer. Although the internal temperature is prevented from being lost to the outside during use, it is still unable to prevent the external cold air from entering in the cold winter. In winter, the thermal insulation effect is poor. At the same time, when the existing thermal insulation pipe is transporting liquid, the joint of the pipeline is easy to leak, and the liquid transportation is not ideal. In addition, the pipeline is prone to double corrosion by the internal medium and the external medium during long-term use, and the service life is reduced. Therefore, we propose a polyurethane prefabricated direct-buried thermal insulation pipe.

Utility model content

In view of the deficiencies of the prior art, the utility model provides a polyurethane prefabricated directly buried thermal insulation pipe, which has the advantages of good thermal insulation effect, prevention of medium heat loss, improvement of pipeline service life and sealing performance, and prevention of liquid leakage, and solves the problem of thermal insulation pipes. In winter, the insulation effect is poor, the liquid is easy to leak, and the service life is reduced.

The utility model provides the following technical solutions: a polyurethane prefabricated directly buried thermal insulation pipe, comprising a steel pipe, an insulation layer is fixedly installed on the inner side of the steel pipe, an internal anti-corrosion layer is fixedly installed on the inner side of the insulation layer, and an outer side of the steel pipe is fixedly installed. A thermal insulation layer is fixedly installed, a polyurethane thermal insulation layer is fixedly installed on the outside of the thermal insulation layer, an external anti-corrosion layer is fixed on the outside of the polyurethane thermal insulation layer, and the left and right sides of the steel pipe are fixedly installed with connection ports, so The inner cavity of the connection port is provided with a water stop strip, and the inner side of the water stop strip is provided with a sealing member.

Preferably, aerogel is provided between the thermal insulation layer and the inner anti-corrosion layer, and the aerogel is provided with two layers.

Preferably, the sealing member includes a sealing packing layer fixedly connected with the water stop strip, and a sealing layer is provided on the inner side of the sealing packing layer.

Preferably, the inner side of the sealing layer is provided with a threaded groove.

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

1. The polyurethane prefabricated direct-buried thermal insulation pipe prevents the internal temperature of the pipeline from being lost to the outside through the use of the thermal insulation layer. At the same time, through the use of the thermal insulation layer, the pipeline is wrapped with the polyurethane thermal insulation layer to prevent the external cold air from entering the inside of the pipeline. The aerogel between the thermal insulation layer and the internal anti-corrosion layer is used to improve the thermal insulation effect of the thermal insulation layer, to ensure that the pipeline has a good thermal insulation effect, and to prevent the heat loss of the liquid during the transmission process.

2. The polyurethane prefabricated direct-buried thermal insulation pipe protects the inside of the pipeline through the use of an internal anti-corrosion layer to prevent the medium inside the pipeline from corroding the pipeline, and at the same time uses the external anti-corrosion layer to prevent the medium outside the pipeline from corroding the pipeline, double protection pipe The road is not damaged by corrosion, which ensures that the service life of the device is increased.

3. The polyurethane prefabricated direct-buried thermal insulation pipe improves the sealing performance of the device through the use of seals and prevents liquid leakage at the joint. The leak-proof effect of the device ensures the normal delivery of liquids.

Description of drawings

Fig. 1 is a schematic diagram of the front inner section of the structure of the utility model;

FIG. 2 is a schematic diagram of an internal cross-section of the structure of the utility model.

In the figure: 1. Steel pipe; 2. Thermal insulation layer; 3. Internal anti-corrosion layer; 4. Thermal insulation layer; 5. Polyurethane thermal insulation layer; 6. External anti-corrosion layer; 7. Connection port; 8. Water stop strip; 9 ,Seals.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figure 1-2, a polyurethane prefabricated direct-buried thermal insulation pipe, including a steel pipe 1, the inner side of the steel pipe 1 is fixedly installed with an insulation layer 2, the inner side of the insulation layer 2 is fixedly installed with an internal anti-corrosion layer 3, and the outer side of the steel pipe 1 is fixed The thermal insulation layer 4 is installed, and the outer side of the thermal insulation layer 4 is fixedly installed with a polyurethane thermal insulation layer 5. Through the use of the thermal insulation layer 2, the internal temperature of the pipeline is prevented from being lost to the outside. At the same time, through the use of the thermal insulation layer 4, the polyurethane thermal insulation layer is used. 5. Wrap the pipeline to prevent external cold air from entering the inside of the pipeline, improve the thermal insulation effect of the thermal insulation layer, ensure that the thermal insulation effect of the pipeline is good, and prevent the heat loss of the liquid during the transmission process. The outer side of the polyurethane thermal insulation layer 5 is fixedly installed with an external anti-corrosion layer 6. Through the use of the internal anti-corrosion layer 3, the inside of the pipeline is protected to prevent the medium inside the pipeline from corroding the pipeline. At the same time, the external anti-corrosion layer 6 is used to prevent the medium outside the pipeline from corroding the pipeline, which double protects the pipeline from corrosion damage, ensuring the The service life of the device is improved. The left and right sides of the steel pipe 1 are fixedly installed with connection ports 7, and the inner cavity of the connection port 7 is provided with a water stop strip 8. Through the use of the water stop strip 8, the water-swelling performance is used to further improve the The leak-proof effect of the device ensures the normal delivery of liquid, and the inner side of the water stop strip 8 is provided with a sealing member 9 .

Among them, aerogel is arranged between the thermal insulation layer 2 and the internal anti-corrosion layer 3, the aerogel is arranged with two layers, and three layers of aerogel are arranged between the thermal insulation layer 2 and the internal anti-corrosion layer 3 to improve the thermal insulation of the thermal insulation layer. It ensures that the pipeline has a good thermal insulation effect and prevents the heat loss of the liquid during the transmission process.

Among them, the sealing member 9 includes a sealing packing layer fixedly connected with the water stop strip 8, and a sealing layer is arranged on the inner side of the sealing packing layer. It is deformed in the middle, which improves the sealing effect of the sealing element 9 and prevents the liquid from leaking during the conveying process.

Among them, the inner side of the sealing layer is provided with a threaded groove, and the inner side of the sealing layer is provided with a threaded groove, which makes the pipeline connection convenient, and at the same time improves the pressing force between the pipelines to ensure the tight connection between the pipelines. Simple, reasonable design and strong practicability.

Working principle: Through the use of the insulation layer 2, the internal temperature of the pipeline is prevented from being lost to the outside, and the polyurethane insulation layer 5 is used to wrap the pipeline to prevent the external cold air from entering the inside of the pipeline. Aerogel can improve the thermal insulation effect of the thermal insulation layer 2, and through the use of the sealing member 9, the pipeline is sealed to prevent the liquid from leaking at the joint, and at the same time, the performance of the water stop strip 8 to expand in contact with water is used to further improve the device. The leak-proof effect can be achieved.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. The utility model provides a prefabricated direct-burried insulating tube of polyurethane, includes steel pipe (1), its characterized in that: the steel pipe heat preservation system is characterized in that a heat preservation layer (2) is fixedly mounted on the inner side of the steel pipe (1), an inner anti-corrosion layer (3) is fixedly mounted on the inner side of the heat preservation layer (2), a heat insulation layer (4) is fixedly mounted on the outer side of the steel pipe (1), a polyurethane heat preservation layer (5) is fixedly mounted on the outer side of the heat insulation layer (4), an outer anti-corrosion layer (6) is fixedly mounted on the outer side of the polyurethane heat preservation layer (5), a connector (7) is fixedly mounted on the left side and the right side of the steel pipe (1), a water stop strip (8) is arranged in an inner cavity of the connector (7).

2. The prefabricated direct-burial polyurethane thermal insulation pipe as claimed in claim 1, wherein: aerogel is arranged between the heat preservation layer (2) and the internal anti-corrosion layer (3), and the aerogel is provided with two layers.

3. The prefabricated direct-burial polyurethane thermal insulation pipe as claimed in claim 1, wherein: the sealing element (9) comprises a sealing packing layer fixedly connected with the water stop strip (8), and a sealing layer is arranged on the inner side of the sealing packing layer.

4. The prefabricated direct-burial polyurethane thermal insulation pipe as claimed in claim 3, wherein: and a thread groove is formed in the inner side of the sealing layer.

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