Heat-insulating corrosion-resistant pipeline

Abstract

The utility model discloses a heat-insulating corrosion-resistant pipeline, which relates to the technical field of pipelines and comprises an inner pipe, an outer pipe, a mounting plate, a heat-conducting column and a sealing plate. The inner pipe is sleeved with the outer pipe, and a heat insulation cavity is formed between the outer pipe and the inner pipe. A mounting plate is arranged on the outer pipe, a heat conduction column is arranged on the inner pipe, and the mounting plate and the heat conduction column are both arranged in the heat insulation cavity; a first heat dissipation hole is formed in the mounting plate, and the first heat dissipation hole communicates with the heat insulation cavity; a sealing plate matched with the heat conduction column is arranged in the mounting plate in a sliding mode, and second heat dissipation holes are formed in the sealing plate in a penetrating mode. When the inner pipe is in an expansion state, the first heat dissipation holes communicate with the second heat dissipation holes, and the heat conduction columns convey heat of the inner pipe into the heat insulation cavity through the first heat dissipation holes and the second heat dissipation holes which communicate with each other. According to the utility model, the phenomenon of excessive expansion of the inner pipe caused by overhigh temperature is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline technical field especially is related to a heat -proof corrosion -resistant pipeline. BACKGROUND

[0002] In life, the market needs long-distance loose hot water, hot steam and other energy media, and it is necessary to avoid energy loss as much as possible and improve the conveying efficiency in the conveying process. At present, the metal pipe and the additional asbestos layer and rubber layer are combined to form a pipe material structure for conveying high-temperature medium in industrial and civil pipelines. This structure has a certain heat insulation effect, but it cannot effectively solve the problem that the pipeline will expand itself when affected by high temperature, resulting in cracking of the pipeline body. Moreover, it is prone to corrosion itself during long-term use, which greatly reduces the overall service life.

[0003] For example, the Chinese utility model patent application with publication number CN219198543U discloses a heat insulation pipeline and its heat insulation assembly, which includes an outer pipeline connected with an inner pipeline through four connecting columns. Heat insulation sheets are arranged on the outer side of the inner pipeline between the four connecting columns, and heat insulation sand is arranged between the four heat insulation sheets and the outer pipeline. The inner pipeline includes a high-temperature-resistant layer, a heat insulation layer is arranged on the outer side of the high-temperature-resistant layer, a first protective layer is arranged on the outer side of the heat insulation layer, and a first wear-resistant layer is arranged on the outer side of the first protective layer. Although it records the inner and outer pipelines and can achieve a certain heat insulation effect, only the connecting columns support the inner and outer pipelines, which is prone to deformation and other problems, and no corrosion prevention measures are provided, resulting in damage to the inner and outer pipelines. When the pipeline is affected by high temperature during use, the pipeline body will expand itself and crack, reducing the service life of the pipeline.

[0004] Therefore, it is necessary to design a heat-insulating and corrosion-resistant pipeline structure that can effectively prevent the inner pipe from expanding excessively due to high temperature and effectively reduce the corrosion rate of the pipeline itself, thereby improving the overall service life. UTILITY MODEL CONTENTS

[0005] In order to solve the problems existing in the prior art, the utility model provides a heat-insulating and corrosion-resistant pipeline to solve the problem that the pipeline will expand itself when affected by high temperature, resulting in cracking of the pipeline body, and the pipeline is prone to corrosion itself during long-term use, greatly reducing the overall service life.

[0006] In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:

[0007] The utility model provides a kind of heat-insulated corrosion-resistant pipeline, including inner tube, outer tube, mounting plate, heat-conducting column and sealing plate;Outer tube is set outside inner tube, and heat-insulating cavity is equipped between outer tube and inner tube;Mounting plate is equipped on outer tube, and heat-conducting column is equipped on inner tube, and mounting plate and heat-conducting column are all located inside heat-insulating cavity;First radiating hole is opened in mounting plate, and first radiating hole is communicated with heat-insulating cavity;Sealing plate is slidably arranged in mounting plate and cooperates with heat-conducting column, and second radiating hole is arranged through sealing plate;When inner tube is in the state of expansion, first radiating hole and second radiating hole are communicated, and heat-conducting column transports the heat of inner tube to heat-insulating cavity through the communicated first radiating hole and second radiating hole.

[0008] Based on the above technical scheme, further, the mounting plate is provided with several groups, and the mounting plates are evenly spaced in the inner wall of the outer tube.

[0009] Based on the above technical scheme, further, the heat-conducting column is provided with several groups same as the number of mounting plates, and the heat-conducting columns are evenly spaced in the outer wall of the inner tube.

[0010] Based on the above technical scheme, further, one end of the heat-conducting column corresponding to each mounting plate is provided, and the one end of the heat-conducting column and the mounting plate are provided with a movable space.

[0011] Based on the above technical scheme, further, it also includes support rib, the support rib is arranged between the inner tube and the outer tube, and one support rib is arranged between adjacent two mounting plates, and the support rib forms the heat-insulating cavity in cooperation with the mounting plate and the heat-conducting column.

[0012] Based on the above technical scheme, further, the support rib is provided with a through hole in the inside.

[0013] Based on the above technical scheme, further, the top end of the heat-conducting column is provided with a top plate, and the top plate is connected with the sealing plate.

[0014] Based on the above technical scheme, further, the aperture of the first radiating hole is larger than the aperture of the second radiating hole.

[0015] Based on the above technical scheme, further, the outer tube is provided with wear-resistant layer, corrosion-resistant layer and thermal insulation layer in turn along the direction close to the inner tube from outside. The wear-resistant layer is made of high chromium alloy material. The corrosion-resistant layer is made of epoxy coal tar pitch material. The thermal insulation layer is made of polyurethane material.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] (1) The inner tube in the utility model is affected by high temperature, and there is a certain activity space between the heat conduction column and the mounting plate, that is, the expansion space, so that the inner tube does not crack when expanding, and when the inner tube drives the heat conduction column to expand, the first heat dissipation hole and the second heat dissipation hole are in a flush state, the heat conduction column transports the heat of the inner tube to the heat insulation cavity through the heat dissipation hole, and the phenomenon of excessive expansion of the inner tube due to excessive temperature is effectively prevented.

[0018] (2) The outer tube includes a wear-resistant layer, a corrosion-resistant layer and a thermal insulation layer, wherein the wear-resistant layer is made of high chromium alloy and has high hardness and wear resistance, thereby effectively reducing the use failure of the outer tube due to wear, the corrosion-resistant layer is made of epoxy coal tar pitch material and has excellent electrical insulation, water permeability resistance, microbial corrosion resistance, stray current resistance, heat resistance, temperature difference sudden change resistance and other excellent properties, thereby effectively reducing the corrosion rate of the pipeline itself, improving the overall service life, and the thermal insulation layer in the interlayer is made of polyurethane material and has heat insulation, sound insulation, shock resistance, poison resistance and other properties, thereby reducing the heat loss in the heat insulation cavity.

[0019] (3) The outer tube and the inner tube are uniformly connected with a plurality of support ribs, and the support ribs form the heat insulation cavity in cooperation with the mounting plate and the heat conduction column. The heat insulation cavity is filled with carbon dioxide gas, which has stable chemical properties and is not easy to react with the pipeline wall and the protective layer, thereby reducing heat loss. The support ribs strengthen the compression resistance of the outer tube and the inner tube, effectively prevent the device from deforming due to excessive pressure, and the heat insulation cavity reduces the heat conduction area, thereby effectively reducing heat loss. During the expansion of the inner tube due to high temperature, the support ribs can be deformed and contracted, thereby improving the buffering force between the inner tube and the outer tube and preventing the inner tube and the outer tube from being damaged by external impact force. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the pipeline of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the pipeline of the utility model without the outer tube;

[0022] Figure 3 It is a half sectional view of Figure 1 ;

[0023] Figure 4 It is a sectional view of the heat conduction column, the first heat dissipation hole and other combined structures in the utility model Figure 2 ;

[0024] Figure 5 It is a schematic diagram of the layered structure inside the outer tube of the utility model;

[0025] Reference signs:

[0026] 1, outer tube; 2, inner tube; 3, support rib; 4, mounting plate; 5, first heat dissipation hole; 6, heat conduction column; 7, heat insulation cavity; 8, top plate; 9, sealing plate; 10, second heat dissipation hole; 11, wear-resistant layer; 12, corrosion-resistant layer; 13, heat preservation layer. DETAILED DESCRIPTION

[0027] The technical features of each embodiment of the present application can be combined accordingly without conflict.

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways other than those described herein without departing from the spirit of the present application, and those skilled in the art can make similar improvements without departing from the technical concept of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below. The technical features of each embodiment of the present application can be combined accordingly without conflict.

[0029] In the description of the present application, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element with an intermediate element. In contrast, when an element is referred to as being "directly" connected to another element, there is no intermediate element.

[0030] In the description of the present application, it should be understood that the terms "first", "second" are only used for distinguishing purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features.

[0031] EMBODIMENT

[0032] COMBINATION Figures 1-5As shown, the embodiment provides a heat-insulating corrosion-resistant pipeline, which comprises an inner pipe 2, an outer pipe 1, a mounting plate 4, a heat-conducting column 6 and a sealing plate 9. The outer pipe 1 is sleeved outside the inner pipe 2, and a heat-insulating cavity 7 is arranged between the outer pipe 1 and the inner pipe 2. The outer pipe 1 is provided with the mounting plate 4, and the inner pipe 2 is provided with the heat-conducting column 6. Both the mounting plate 4 and the heat-conducting column 6 are arranged inside the heat-insulating cavity 7. The mounting plate 4 is provided with a first heat dissipation hole 5, and the first heat dissipation hole 5 is communicated with the heat-insulating cavity 7. The sealing plate 9 is slidably arranged in the mounting plate 4 and matched with the heat-conducting column 6. The sealing plate 9 is provided with a second heat dissipation hole 10. When the inner pipe 2 is affected by high temperature, a certain space, i.e. an expansion space, is formed between the heat-conducting column 6 and the mounting plate 4, so that the inner pipe 2 will not be cracked during expansion. When the inner pipe 2 expands with the heat-conducting column 6, the first heat dissipation hole 5 and the second heat dissipation hole 10 are in a flush state. The heat-conducting column 6 transmits the heat of the inner pipe 2 to the heat-insulating cavity 7 through the heat dissipation holes, so as to effectively prevent the inner pipe 2 from being excessively expanded due to high temperature. The diameter of the first heat dissipation hole 5 is larger than that of the second heat dissipation hole 10. Further, the mounting plate 4 is provided with a plurality of groups, and the mounting plates 4 are uniformly and spacedly arranged on the inner wall of the outer pipe 1. The contact surface between the sealing plate 9 and the mounting plate 4 is provided in a rough state.

[0033] In the embodiment, the heat-conducting column 6 is provided with a plurality of groups in the same number as the mounting plate 4, and the heat-conducting columns 6 are uniformly and spacedly arranged on the outer wall of the inner pipe 2. One end of each heat-conducting column 6 is arranged in the mounting plate 4, and the other end of the heat-conducting column 6 is provided with a space in the mounting plate 4. The top end of the heat-conducting column 6 is provided with a top plate 8, and the top plate 8 is connected with the sealing plate 9. In the embodiment, the opposite sides of the top plate 8 are connected with two sealing plates 9. One top plate 8 and two sealing plates 9 form a U-shaped structure.

[0034] In the embodiment, the support rib 3 is arranged between the inner pipe 2 and the outer pipe 1. A plurality of support ribs 3 are uniformly connected between the outer pipe 1 and the inner pipe 2, and one support rib 3 is arranged between two adjacent mounting plates 4. The support rib 3 forms the heat-insulating cavity 7 in cooperation with the mounting plate 4 and the heat-conducting column 6. The support rib 3 is provided with a through hole structure, and the through hole structure is communicated with the heat-insulating cavity 7. The heat-insulating cavity 7 is filled with carbon dioxide gas. The carbon dioxide gas has stable chemical properties and is not easy to react with the pipeline wall and the protective layer, so as to reduce heat loss. The support rib 3 can strengthen the pressure resistance of the outer pipe 1 and the inner pipe 2, effectively prevent the device from being deformed due to excessive pressure, and reduce the heat-conducting area of the heat-insulating cavity 7, so as to effectively reduce heat loss. During the expansion of the inner pipe 2 due to high temperature, the support rib 3 can be deformed and contracted, so as to improve the buffering force between the inner pipe 2 and the outer pipe 1 and prevent the inner pipe 2 and the outer pipe 1 from being damaged by external impact force.

[0035] Specifically, the support rib 3 is hollow, which improves the buffering force between the inner tube 2 and the outer tube 1, prevents the inner tube 2 and the outer tube 1 from being damaged by external impact force, and provides a certain expansion space between the heat-conducting column 6 and the mounting plate 4 in a normal state. When the inner tube 2 flows with high-temperature fluid, the inner tube 2 will expand due to heat, at which time the inner tube 2 can drive the heat-conducting column 6 to slide to one side, so that the heat-conducting column 6 has a certain expansion distance. Meanwhile, the support rib 3 can deform and contract due to the hollow structure during the expansion of the inner tube 2 due to high temperature, so that the inner tube 2 will not crack during the expansion at high temperature, and the service life of the whole is improved. The top end of the heat-conducting column 6 is connected with a top plate 8, and the bottom ends of the top plate 8 are connected with sealing plates 9. During the expansion of the inner tube 2, the heat-conducting column 6 will slide to one end of the inner wall of the mounting plate 4, and the heat-conducting column 6 will drive the top plate 8 to slide, so that the sealing plates 9 on both sides slide upward, so that the first heat dissipation hole 5 and the second heat dissipation hole 10 are flush, the heat of the heat-conducting column 6 is discharged into the heat insulation cavity 7, and the phenomenon of excessive expansion of the inner tube 2 due to excessive temperature is effectively prevented. In the initial state, the first heat dissipation hole 5 and the second heat dissipation hole 10 are staggered, which effectively reduces the heat loss.

[0036] Referring to Figure 4 In the embodiment, the outer tube 1 is provided with a wear-resistant layer 11, a corrosion-resistant layer 12 and a thermal insulation layer 13 in sequence from the direction close to the inner tube 2. The wear-resistant layer 11 is made of high-chromium alloy and has high hardness and wear resistance, which effectively reduces the phenomenon of use failure of the outer tube 1 due to wear. The corrosion-resistant layer 12 is made of epoxy coal tar pitch material and has excellent electrical insulation, water permeability resistance, microbial corrosion resistance, stray current resistance, heat resistance, temperature difference resistance and other excellent properties, which effectively reduces the corrosion rate of the pipeline and improves the service life of the whole. The thermal insulation layer 13 in the interlayer is made of polyurethane material and has heat insulation, sound insulation, shock resistance, anti-toxicity and other properties, which plays a role in reducing heat loss in the heat insulation cavity 7.

[0037] Please refer to Figures 2-4 The aperture of the first heat dissipation hole 5 is larger than that of the second heat dissipation hole 10. When the heat-conducting column 6 moves to one end of the mounting plate 4, the second heat dissipation hole 10 is fully exposed to the first heat dissipation hole 5, which accelerates the heat dissipation of the heat-conducting column 6. The contact surface between the sealing plate 9 and the mounting plate 4 is rough, which increases the sliding friction between the sealing plate 9 and the mounting plate 4. When the pipeline is impacted by the outside, the sealing plate 9 is effectively prevented from sliding in the mounting plate 4.

[0038] The working principle of the structure is as follows:

[0039] In use, when the inner tube 2 flows high-temperature fluid, the inner tube 2 is heated and expands, at this time, the heat-conducting column 6 and the mounting plate 4 have a certain expansion space, which effectively prevents the inner tube 2 from expanding and cracking, and at the same time, when the inner tube 2 drives the heat-conducting column 6 to expand and slide, the first heat dissipation hole 5 on the mounting plate 4 and the second heat dissipation hole 10 on the sealing plate 9 are in a flush state, at this time, heat is discharged to the heat insulation cavity 7 under the action of the heat-conducting column 6, which effectively prevents the inner tube 2 from expanding excessively due to excessively high temperature.

[0040] The above is only an embodiment of the present application, which is described in detail, but it cannot be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A thermally insulated corrosion resistant pipe, characterized in that The heat dissipation device comprises an inner tube, an outer tube, a mounting plate, a heat conduction column and a sealing plate. The outer tube is sleeved outside the inner tube, and a heat insulation cavity is arranged between the outer tube and the inner tube. The mounting plate is arranged on the outer tube, the heat conduction column is arranged on the inner tube, and the mounting plate and the heat conduction column are arranged inside the heat insulation cavity. A first heat dissipation hole is arranged on the mounting plate, and the first heat dissipation hole is communicated with the heat insulation cavity. A sealing plate matched with the heat conduction column is arranged in the mounting plate, and a second heat dissipation hole is arranged through the sealing plate.

2. A thermally insulated corrosion resistant pipe according to claim 1, characterized in that When the inner tube is in an expanded state, the first heat dissipation hole and the second heat dissipation hole are communicated, and the heat conduction column transmits the heat of the inner tube to the heat insulation cavity through the communicated first heat dissipation hole and second heat dissipation hole.

3. A thermally insulated corrosion resistant pipe according to claim 2, characterized in that The mounting plate is provided with a plurality of groups, and the mounting plates are uniformly and spacedly arranged on the inner wall of the outer tube.

4. A thermally insulated corrosion resistant pipe according to claim 3, characterized in that The heat conduction column is provided with a plurality of groups with the same number as the mounting plate, and the heat conduction columns are uniformly and spacedly arranged on the outer wall of the inner tube.

5. A thermally insulated corrosion resistant pipe according to claim 1, characterized in that One end of the heat conduction column is arranged in each mounting plate, and the one end of the heat conduction column is arranged in the mounting plate with a movement space.

6. A thermally insulated corrosion resistant pipe according to claim 5, characterized in that A support rib is arranged between the inner tube and the outer tube, one support rib is arranged between adjacent mounting plates, and the support rib, the mounting plate and the heat conduction column form the heat insulation cavity.

7. A thermally insulated corrosion resistant pipe according to claim 1, characterized in that A through hole is arranged in the support rib.

8. A thermally insulated corrosion resistant pipe according to claim 1, characterized in that A top plate is arranged at the top end of the heat conduction column, and the top plate is connected with the sealing plate.

9. A corrosion resistant insulated pipe according to claim 1, wherein The diameter of the first heat dissipation hole is larger than that of the second heat dissipation hole. The outer tube is provided with a wear-resistant layer, a corrosion-resistant layer and a heat preservation layer in sequence from the outside to the inner tube.

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