High-temperature-resistant polyurethane thermal insulation pipe

Abstract

The utility model discloses a high-temperature-resistant polyurethane heat preservation pipe, and belongs to the technical field of heat preservation in the field of pipeline engineering, the high-temperature-resistant polyurethane heat preservation pipe comprises a basic pipeline, the basic pipeline is sleeved with an external pipeline, a modified polyurethane foaming layer is arranged between the basic pipeline and the external pipeline, and the basic pipeline is sleeved with a fixing mechanism; the fixing mechanism is located in the modified polyurethane foaming layer and comprises a sleeving ring, multiple sets of supporting rods are arranged outside the sleeving ring, and supporting blocks are arranged at the other ends of the multiple sets of supporting rods; during use, the effect that the basic pipeline is centered in the external pipeline can be guaranteed, the non-uniform effect of the modified polyurethane foaming layer caused by position deviation of the basic pipeline in the external pipeline is prevented, and the influence on the heat preservation performance of the modified polyurethane foaming layer is avoided; the thermal insulation performance and the use stability are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermal insulation technology in the field of pipeline engineering, and particularly relates to a high-temperature-resistant polyurethane thermal insulation pipe. BACKGROUND

[0002] With the continuous progress of industrial production and the rapid development of technology, the performance requirements of the pipeline system are also continuously improved. Especially for the pipeline system working in high-temperature environment, the traditional thermal insulation materials have been difficult to meet the actual demand. Although the existing thermal insulation materials such as rock wool, glass fiber or ordinary polyurethane foam have certain thermal insulation effect, their physical properties will decrease significantly under extreme temperature changes, resulting in reduced thermal insulation efficiency or even failure, thereby increasing the energy consumption cost. In recent years, the emergence and development of a number of patent technologies provide new ideas and methods for solving these problems.

[0003] The existing thermal insulation pipe needs to first put the base pipe into the inside of the external pipe, and then spray modified polyurethane into the inside of the external pipe when in use, but in this way, the base pipe may be offset in the inside of the external pipe, which may cause uneven distribution of the modified polyurethane, and further cause problems in the thermal insulation effect. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the present application provides a high-temperature-resistant polyurethane thermal insulation pipe, which overcomes the deficiencies of the prior art and aims to solve the problems that the existing thermal insulation pipe in the prior art needs to first put the base pipe into the inside of the external pipe, and then spray modified polyurethane into the inside of the external pipe when in use, but in this way, the base pipe may be offset in the inside of the external pipe, which may cause uneven distribution of the modified polyurethane, and further cause problems in the thermal insulation effect.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a high-temperature-resistant polyurethane thermal insulation pipe, comprising a base pipe, an external pipe is sleeved outside the base pipe, a modified polyurethane foaming layer is arranged between the base pipe and the external pipe, a fixing mechanism is sleeved outside the base pipe, the fixing mechanism is located inside the modified polyurethane foaming layer, the fixing mechanism comprises a sleeving ring, a plurality of groups of supporting rods are arranged outside the sleeving ring, supporting blocks are arranged at the other ends of the plurality of groups of supporting rods, the top of the supporting block abuts against the inside of the external pipe, two groups of connecting plates are arranged inside the sleeving ring, connecting pins are arranged inside the two groups of connecting plates, the two ends of the connecting pin respectively penetrate the inside of the two groups of connecting plates, nuts are arranged at the two ends of the connecting pin, and the nut and the connecting pin are in threaded connection.

[0006] By adopting the technical scheme, the fixing mechanism is arranged, so that the basic pipeline can be centrally arranged in the internal pipeline during use; before the basic pipeline is arranged in the internal pipeline, a plurality of fixing mechanisms can be directly sleeved on the external pipeline, and then the fixing mechanisms are fastened by rotating the two nuts, so that the fixing mechanisms are firmly arranged on the external pipeline; then the basic pipeline is arranged in the internal pipeline; and after the arrangement, the modified polyurethane foaming layer is sprayed between the basic pipeline and the internal pipeline; the modified polyurethane foaming layer arranged on the external pipeline of the basic pipeline can prevent most of the heat from penetrating due to the low thermal conductivity and excellent closed pore structure, so that the change rate of the temperature is greatly reduced, the central arrangement of the basic pipeline in the internal pipeline is ensured, the non-uniformity of the modified polyurethane foaming layer caused by the deviation of the position of the basic pipeline in the internal pipeline is prevented, the influence of the modified polyurethane foaming layer on the heat preservation performance is avoided, and the heat preservation performance and the stability during use are greatly improved.

[0007] As a preferred technical scheme of the present application, one end of the external pipeline is provided with a sealing mechanism, the sealing mechanism comprises a sealing plate, one end of the basic pipeline penetrates the sealing mechanism, one side of the sealing plate is provided with a plurality of mounting blocks, a plurality of threaded holes are arranged in the internal pipeline of the mounting block, and a plurality of screw rods are threadedly connected in the internal pipeline of the mounting block.

[0008] By adopting the technical scheme, the sealing mechanism is arranged, so that the two ends of the external pipeline can be sealed during use; when the position of the basic pipeline in the internal pipeline deviates, the position of the basic pipeline can be finely adjusted by rotating the screw rod; and after the position is accurate, the basic pipeline can be fixed by rotating the four screw rods, so that the deviation is avoided.

[0009] As a preferred technical scheme of the present application, the external pipeline is provided with a reflective heat insulation film, the reflective heat insulation film is made of aluminum foil, and the material of the basic pipeline is carbon steel.

[0010] By adopting the technical scheme, the reflective heat insulation film is arranged, so that the aluminum foil has the characteristics of high reflectivity and light weight, can effectively reflect the small part of the radiation heat filtered by the modified polyurethane foaming layer, and further enhances the heat preservation performance.

[0011] As a preferred technical scheme of the present application, the basic pipeline and the modified polyurethane foaming layer are provided with an intumescent fire retardant coating layer.

[0012] By adopting the technical scheme, the intumescent fire retardant coating layer is set, and when in use, the intumescent fire retardant coating expands when encountering high temperature, and the volume rapidly increases several times, thereby effectively blocking the spread of fire.

[0013] As a preferred technical scheme of the present application, the inner side of the sealing mechanism is provided with a sealing gasket made of rubber.

[0014] By adopting the technical scheme, the sealing gasket is set, which can further improve the sealing performance of the two ends of the external pipeline and improve the stability during use.

[0015] As a preferred technical scheme of the present application, the modified polyurethane foaming layer is mixed with ceramic micro powder inside.

[0016] By adopting the technical scheme, the ceramic micro powder is set, which has excellent high-temperature resistance and insulation performance and can maintain stable physical properties in a high-temperature environment; mixing the ceramic micro powder into the modified polyurethane foaming layer can significantly improve the temperature resistance grade of the modified polyurethane foaming layer, so that it can still maintain good heat preservation effect at a higher temperature.

[0017] As a preferred technical scheme of the present application, the internal pipeline is provided with a wear-resistant protective layer, and the material of the wear-resistant protective layer is polyethylene.

[0018] By adopting the technical scheme, the wear-resistant protective layer is set, which can protect the outside of the external pipeline during use, and polyethylene has high toughness, good wear resistance and impact resistance, which can protect the pipeline from wear and corrosion under extreme working conditions.

[0019] As a preferred technical scheme of the present application, the size of the sealing plate matches the size of the external pipeline, and the material of the sealing plate is EPDM rubber material.

[0020] By adopting the technical scheme, the set EPDM rubber has good elasticity and weather resistance, can adapt to various severe weather conditions, ensure the air tightness and water tightness of the entire system, and prevent moisture from entering to affect the heat preservation effect.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. By setting the fixed mechanism, in use, the effect of the foundation pipe in the inside of the external pipe can be achieved. Before installing the foundation pipe into the inside of the external pipe, a plurality of fixed mechanisms can be directly sleeved on the outside of the foundation pipe, and then the fixed mechanisms are fastened by rotating two nuts, so that the fixed mechanisms are firmly installed on the outside of the foundation pipe. Then the foundation pipe is placed into the inside of the external pipe, and after completion, modified polyurethane foaming layer can be sprayed between the foundation pipe and the external pipe. The modified polyurethane foaming layer on the outside of the foundation pipe prevents most of the heat from penetrating due to its low thermal conductivity and excellent closed pore structure, greatly slows down the rate of temperature change, which can ensure the effect of the foundation pipe in the inside of the external pipe, prevent the uneven effect of the modified polyurethane foaming layer caused by the position deviation of the foundation pipe in the inside of the external pipe, avoid affecting the thermal insulation performance of the modified polyurethane foaming layer, greatly improve the thermal insulation performance and stability in use.

[0023] 2. By setting the sealing mechanism, in use, the two ends of the external pipe can be sealed. Four sets of mounting blocks are provided, and when the position of the foundation pipe in the inside of the external pipe deviates, the workers can rotate the screw rod to resist the foundation pipe to fine-tune the position. After the position is accurate, the foundation pipe can be fixed by rotating the four screw rods to avoid deviation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0025] Figure 2 It is a schematic diagram of the internal structure of the present application;

[0026] Figure 3 It is a schematic diagram of the fixed mechanism structure of the present application;

[0027] Figure 4 It is a schematic diagram of the sealing mechanism structure of the present application.

[0028] In the figure: 1, foundation pipe; 101, reflective insulation film; 102, intumescent fire retardant coating layer; 2, external pipe; 201, wear-resistant protective layer; 3, modified polyurethane foaming layer; 4, fixed mechanism; 401, sleeving ring; 402, support rod; 403, support block; 404, connecting plate; 405, connecting pin; 406, nut; 5, sealing mechanism; 501, sealing plate; 502, mounting block; 503, screw rod; 504, sealing washer. DETAILED DESCRIPTION

[0029] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0030] With reference to Figures 1-4 The high-temperature-resistant polyurethane heat preservation pipe comprises a base pipe 1, an outer pipe 2 sleeved outside the base pipe 1, a modified polyurethane foaming layer 3 arranged between the base pipe 1 and the outer pipe 2, and a fixing mechanism 4 sleeved outside the base pipe 1 and located inside the modified polyurethane foaming layer 3. The fixing mechanism 4 comprises a sleeving ring 401, a plurality of support rods 402 arranged outside the sleeving ring 401, support blocks 403 arranged at the other ends of the plurality of support rods 402, and two connecting plates 404 arranged inside the sleeving ring 401. The inside of each of the two connecting plates 404 is provided with a connecting pin 405, and the two ends of the connecting pin 405 respectively penetrate the inside of the two connecting plates 404. The two ends of the connecting pin 405 are respectively provided with a nut 406 in threaded connection with the connecting pin 405. The outside of the base pipe 1 is provided with a reflective heat insulation film 101 made of aluminum foil, and the base pipe 1 is made of carbon steel.

[0031] The fixing mechanism 4 is arranged to realize the centering effect of the base pipe 1 inside the outer pipe 2 during use. Before the base pipe 1 is installed inside the outer pipe 2, a plurality of fixing mechanisms 4 can be directly sleeved outside the base pipe 1, and then the fixing mechanisms 4 are fastened by rotating the two nuts 406 to be firmly installed outside the base pipe 1. Then the base pipe 1 is placed inside the outer pipe 2, and after completion, the modified polyurethane foaming layer 3 is sprayed between the base pipe 1 and the outer pipe 2. The modified polyurethane foaming layer 3 outside the base pipe 1 prevents most of the heat from penetrating due to its low thermal conductivity and excellent closed pore structure, greatly slows down the temperature change rate, thereby ensuring the centering effect of the base pipe 1 inside the outer pipe 2, preventing the uniformity of the modified polyurethane foaming layer 3 caused by the position deviation of the base pipe 1 inside the outer pipe 2, avoiding the influence on the heat preservation performance of the modified polyurethane foaming layer 3, and greatly improving the heat preservation performance and stability during use. The reflective heat insulation film 101 is arranged to effectively reflect the small amount of residual radiant heat filtered by the modified polyurethane foaming layer 3 due to the high reflectivity and light weight of the aluminum foil, thereby further enhancing the heat preservation performance.

[0032] With reference toFigure 1 One end of the outer pipeline 2 is provided with a sealing mechanism 5, the sealing mechanism 5 comprises a sealing plate 501, one end of the base pipeline 1 penetrates the sealing mechanism 5, one side of the sealing plate 501 is provided with a plurality of groups of mounting blocks 502, the inside of the plurality of groups of mounting blocks 502 is provided with a threaded hole, and the inside of the plurality of groups of mounting blocks 502 is threadedly connected with a screw rod 503; the base pipeline 1 and the modified polyurethane foaming layer 3 are provided with an intumescent fire retardant coating layer 102; the inside of the modified polyurethane foaming layer 3 is mixed with ceramic micro powder; by arranging the sealing mechanism 5, the two ends of the outer pipeline 2 can be sealed during use, the four groups of mounting blocks 502 can be used to fine-tune the position of the base pipeline 1 by rotating the screw rod 503 when the position of the base pipeline 1 in the inside of the outer pipeline 2 is found to be deviated, and the base pipeline 1 can be fixed by rotating the four groups of screw rods 503 after the position is accurate, so that the deviation phenomenon is avoided; by arranging the intumescent fire retardant coating layer 102, the intumescent fire retardant coating can expand when encountering high temperature during use, and the volume rapidly increases several times, thereby effectively blocking the spread of fire; by arranging the ceramic micro powder, excellent high-temperature resistance and insulation performance are achieved, and stable physical properties can be maintained in a high-temperature environment; by mixing the ceramic micro powder into the modified polyurethane foaming layer 3, the temperature resistance grade of the modified polyurethane foaming layer 3 can be significantly improved, so that the modified polyurethane foaming layer 3 can still maintain good heat preservation effect at a higher temperature.

[0033] Referring to Figure 1 The inside of the sealing mechanism 5 is provided with a sealing washer 504, and the sealing washer 504 is made of rubber; by arranging the sealing washer 504, the sealing performance of the two ends of the outer pipeline 2 can be further improved during use, and the stability during use is improved; the inside of the outer pipeline 2 is provided with a wear-resistant protective layer 201, and the material of the wear-resistant protective layer 201 is polyethylene; by arranging the wear-resistant protective layer 201, the outside of the outer pipeline 2 can be protected during use, and the polyethylene has high toughness, good wear resistance and impact resistance, so that the pipeline can be protected from wear and corrosion under extreme working conditions; the size of the sealing plate 501 matches the size of the outer pipeline 2, and the material of the sealing plate 501 is EPDM rubber material; the arranged EPDM rubber has good elasticity and weather resistance, can adapt to various severe weather conditions, ensures the air tightness and water tightness of the entire system, and prevents moisture from entering to affect the heat preservation effect.

[0034] Working principle: by setting the fixed mechanism 4, in use, can realize the effect of the foundation pipeline 1 in the inside of the external pipeline 2, before installing the foundation pipeline 1 to the inside of the external pipeline 2, can be directly connected in groups of fixed mechanism 4 on the outside of the foundation pipeline 1, then through the rotation of two groups of nuts 406 to realize the fastening of the fixed mechanism 4, make the fixed mechanism 4 firmly installed on the outside of the foundation pipeline 1, then put the foundation pipeline 1 into the inside of the external pipeline 2, after completion can be sprayed between the foundation pipeline 1 and the external pipeline 2 modified polyurethane foam layer 3, the modified polyurethane foam layer 3 on the outside of the foundation pipeline 1 prevents most of the heat penetration by virtue of its low thermal conductivity and excellent closed pore structure, greatly slows down the rate of temperature change, so as to ensure the effect of the foundation pipeline 1 in the inside of the external pipeline 2, prevent the uneven effect of the modified polyurethane foam layer 3 caused by the position deviation of the foundation pipeline 1 in the inside of the external pipeline 2, avoid the influence on the thermal insulation performance of the modified polyurethane foam layer 3, greatly improve the thermal insulation performance and stability in use, by setting the sealing mechanism 5, in use, can seal the two ends of the external pipeline 2, the four groups of installation block 502 can be set, when the staff feels that the position of the foundation pipeline 1 in the inside of the external pipeline 2 deviates, can be adjusted by rotating the screw rod 503 to resist the foundation pipeline 1, after the position is accurate, the foundation pipeline 1 can be fixed by rotating the four groups of screw rod 503, avoid the phenomenon of deviation;

[0035] Among them, by setting the reflective heat insulation film 101, in use, the aluminum foil material has the characteristics of high reflectivity and light weight, which can effectively reflect the small part of the radiation heat left after filtering through the modified polyurethane foam layer 3, further enhance the thermal insulation performance, by setting the intumescent fire retardant coating layer 102, in use, the intumescent fire retardant coating will swell when it meets high temperature, the volume will increase several times, so as to effectively block the spread of fire;

[0036] At the same time, by setting the sealing gasket 504, in use, can further improve the sealing performance of the two ends of the external pipeline 2, improve the stability in use;

[0037] In addition, by setting the ceramic micropowder, excellent high temperature resistance and insulation performance can be achieved, and stable physical properties can be maintained in a high temperature environment; by blending it into the modified polyurethane foaming layer 3, the temperature resistance level of the modified polyurethane foaming layer 3 can be significantly improved, so that it can still maintain good heat preservation effect at higher temperature; by setting the wear-resistant protective layer 201, the outside of the external pipeline 2 can be protected during use, and the polyethylene has high toughness, good wear resistance and impact resistance, which can protect the pipeline from wear and corrosion under extreme working conditions; the EPDM rubber has good elasticity and weather resistance, can adapt to various harsh weather conditions, ensure the air tightness and water tightness of the whole system, and prevent moisture from entering to affect the heat preservation effect.

[0038] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high temperature resistant polyurethane insulation pipe, characterized in that, The application relates to a pipeline, which comprises a basic pipeline (1), an outer pipeline (2) sleeved outside the basic pipeline (1), a modified polyurethane foaming layer (3) arranged between the basic pipeline (1) and the outer pipeline (2), a fixing mechanism (4) sleeved outside the basic pipeline (1) and located inside the modified polyurethane foaming layer (3), the fixing mechanism (4) comprising a sleeving ring (401), a plurality of groups of supporting rods (402) arranged outside the sleeving ring (401), supporting blocks (403) arranged at the other ends of the plurality of groups of supporting rods (402), the top of each supporting block (403) abutting against the inside of the outer pipeline (2), two groups of connecting plates (404) arranged inside the sleeving ring (401), connecting pins (405) arranged inside the two groups of connecting plates (404), the two ends of each connecting pin (405) penetrating through the inside of the two groups of connecting plates (404), and nuts (406) mounted at the two ends of each connecting pin (405) and in threaded connection with the connecting pin (405).

2. The high temperature resistant polyurethane insulation pipe according to claim 1, characterized in that, One end of the outer pipeline (2) is provided with a sealing mechanism (5), the sealing mechanism (5) comprises a sealing plate (501), one end of the basic pipeline (1) penetrates through the sealing mechanism (5), one side of the sealing plate (501) is provided with a plurality of groups of mounting blocks (502), the inside of each mounting block (502) is provided with a threaded hole, and the inside of each mounting block (502) is in threaded connection with a screw rod (503).

3. The high temperature resistant polyurethane insulation pipe according to claim 1, characterized in that, The outside of the basic pipeline (1) is provided with a reflective heat insulation film (101), the reflective heat insulation film (101) is made of aluminum foil, and the basic pipeline (1) is made of carbon steel.

4. The high temperature resistant polyurethane insulation pipe according to claim 1, characterized in that, An intumescent fire retardant coating layer (102) is arranged between the basic pipeline (1) and the modified polyurethane foaming layer (3).

5. The high temperature resistant polyurethane insulated pipe according to claim 2, wherein, The inner side of the sealing mechanism (5) is provided with a sealing gasket (504), and the sealing gasket (504) is made of rubber.

6. The high temperature resistant polyurethane insulated pipe according to claim 1, wherein, The inside of the modified polyurethane foaming layer (3) is mixed with ceramic micro powder.

7. The high temperature resistant polyurethane insulated pipe according to claim 1, wherein, The inside of the outer pipeline (2) is provided with a wear-resistant protective layer (201), and the wear-resistant protective layer (201) is made of polyethylene.

8. The high temperature resistant polyurethane insulated pipe according to claim 2, wherein, The size of the sealing plate (501) matches the size of the outer pipeline (2), and the sealing plate (501) is made of EPDM rubber.

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