Pipeline for heat treatment of metal products

Abstract

The utility model discloses a pipeline for heat treatment of metal products, and relates to the technical field of pipelines for heat treatment, the pipeline comprises an inner pipe I, an inner pipe II is fixedly connected to the outer surface of the inner pipe I, a vacuum cavity is formed in the inner pipe II, and a heat preservation layer I is fixedly connected to the side face, away from the inner pipe I, of the inner pipe II; the side face, away from the second inner pipe, of the first heat preservation layer is fixedly connected with a second heat preservation layer, and the side face, away from the first heat preservation layer, of the second heat preservation layer is fixedly connected with an anti-corrosion layer. Through cooperation of the structure, the heat preservation effect of the pipeline during heat treatment of conveyed metal products can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment pipelines, in particular to a heat treatment pipeline for metal products. Background Art

[0002] Pipes are used in the heat treatment of metal products, mainly to achieve the process of heating, insulation and cooling of metal materials. These pipes are usually used to transport heating media to metal products for heating treatment.

[0003] At present, the pipes used to transport heat media during metal heat treatment are usually made of metal materials, such as carbon steel, stainless steel, alloy steel, etc. These metal materials have good high temperature resistance and mechanical strength, and can withstand the high temperature and pressure during the heat treatment process. However, although metal materials have good thermal conductivity, it is also because of their good thermal conductivity that heat can be quickly transferred to the outer wall of the pipe; on the other hand, there may be a temperature difference between the pipe and the external environment, and heat may be transferred to the outside through the pipe wall, causing heat loss. This heat loss will cause the temperature of the heat medium to drop during transportation, affecting the effect and efficiency of the heat treatment, resulting in poor insulation effect.

[0004] For this reason, a pipeline for heat treatment of metal products is proposed. Utility Model Content

[0005] The purpose of the utility model is to improve the heat preservation effect of the pipeline when conveying metal products for heat treatment. The present application provides a pipeline for heat treatment of metal products.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A pipe for heat treatment of metal products comprises an inner pipe one, an inner pipe two is fixedly connected to the outer surface of the inner pipe one, a vacuum chamber is opened inside the inner pipe two, a side of the inner pipe two away from the inner pipe one is fixedly connected to an insulation layer one, a side of the insulation layer one away from the inner pipe two is fixedly connected to an insulation layer two, and a side of the insulation layer two away from the insulation layer one is fixedly connected to an anti-corrosion layer.

[0008] Furthermore, the internal volume of the vacuum chamber is connected to an exhaust pipe, and the end of the exhaust pipe away from the vacuum chamber passes through the insulation layer 1, the insulation layer 2 and the anti-corrosion layer and is connected to a vacuum pump, and the vacuum pump is fixedly connected to the outer surface of the anti-corrosion layer.

[0009] Furthermore, the input end of the anti-corrosion layer is electrically connected to an external power source.

[0010] Furthermore, a plurality of support columns are fixedly connected to the inner side wall of the vacuum chamber.

[0011] Furthermore, the material of the first insulation layer is glass wool, and the material of the second insulation layer is polyurethane.

[0012] Furthermore, the material of the anti-corrosion layer is polyethylene.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] In the utility model, when the pipeline is used to transport the heat medium during the heat treatment of metal products, the interior of the vacuum chamber can be evacuated. Under the vacuum state, there is no air or other medium inside the vacuum chamber, which will reduce the area of ​​the inner tube 2 receiving heat transfer, thereby limiting the heat conduction to a certain extent and playing a certain insulation role; and the insulation layer 1 is an elastic felt-like body made of glass fiber with a diameter of only a few microns, and contains a large number of tiny air pores inside, which can effectively reduce the air flow, thereby slowing down the heat transfer speed, so that it has a low thermal conductivity and good thermal insulation performance, and can further insulate the inner tube 2 and the inner tube 1; at the same time, the insulation layer 2 is made of polyurethane, and the molecular chain of polyurethane contains a large number of hydrogen bonds, which can effectively hinder heat conduction, thereby improving the thermal insulation performance of polyurethane, and then strengthening the insulation of the inner tube 2 and the inner tube 1; through the cooperation of the above structure, the insulation effect of the pipeline when transporting metal products for heat treatment can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 For the utility model Figure 2 Enlarged view of point A.

[0018] Markings in the figure: 1-inner tube one, 2-inner tube two, 3-insulation layer one, 4-insulation layer two, 5-anti-corrosion layer, 6-exhaust pipe, 7-vacuum pump, 21-vacuum chamber, 22-support column. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0020] Reference Figure 1-Figure 3 A pipeline for heat treatment of metal products comprises an inner tube 1, an inner tube 2 is fixedly connected to the outer surface of the inner tube 1, and a vacuum chamber 21 is opened inside the inner tube 2; specifically, when the pipeline is used to transport heat medium during heat treatment of metal products, the interior of the vacuum chamber 21 can be evacuated into a vacuum state. In the vacuum state, there is no air or other medium inside the vacuum chamber 21, which will reduce the area of ​​the inner tube 2 2 receiving heat transfer, thereby limiting heat conduction to a certain extent and playing a certain role in heat preservation.

[0021] Reference Figure 1-Figure 3 , the side of the inner tube 2 away from the inner tube 1 is fixedly connected with an insulation layer 3, and the material of the insulation layer 3 is glass wool; specifically, the insulation layer 3 made of glass wool is an elastic felt-like body made of glass fibers with a diameter of only a few microns, and contains a large number of tiny air pores inside, which can effectively reduce air flow, thereby slowing down the heat transfer rate, so that it has a low thermal conductivity and good thermal insulation performance, and can further insulate the inner tube 2 and the inner tube 1; the side of the insulation layer 3 away from the inner tube 2 is fixedly connected with an insulation layer 24, and the material of the insulation layer 24 is polyurethane; specifically, the insulation layer 24 is made of polyurethane, and the molecular chain of polyurethane contains a large number of hydrogen bonds, which can effectively hinder heat conduction, thereby improving the thermal insulation performance of polyurethane, and then strengthening the insulation of the inner tube 2 and the inner tube 1; through the cooperation of the above structure, the insulation effect of the pipeline during the heat treatment of conveying metal products can be improved.

[0022] Reference Figure 1-Figure 3 The internal volume of the vacuum chamber 21 is connected to an exhaust pipe 6, and the end of the exhaust pipe 6 away from the vacuum chamber 21 passes through the insulation layer 1 3, the insulation layer 2 4 and the anti-corrosion layer 5 and is connected to a vacuum pump 7. The vacuum pump 7 is fixedly connected to the outer surface of the anti-corrosion layer 5, and the input end of the anti-corrosion layer 5 is electrically connected to an external power supply; specifically, starting the vacuum pump 7 can enable the exhaust pipe 6 to pump the air inside the vacuum chamber 21 so as to evacuate the inside of the vacuum chamber 21; the inner side wall of the vacuum chamber 21 is fixedly connected to a plurality of support columns 22; specifically, the support columns 22 can support the evacuated inner wall of the vacuum chamber 21.

[0023] Reference Figure 1-Figure 3 The side of the insulation layer 2 4 away from the insulation layer 1 3 is fixedly connected with an anti-corrosion layer 5, and the material of the anti-corrosion layer 5 is polyethylene; specifically, the anti-corrosion layer 5 made of polyethylene has good moisture resistance, electrical insulation, low temperature resistance, radiation resistance, good water resistance, chemical stability and other properties, so as to provide certain protection for the pipeline from the outside.

[0024] The implementation principle of the embodiment of a pipeline for heat treatment of metal products in the present application is:

[0025] When using the device, first connect to an external power source. When the pipeline is used to transport the heat medium during the heat treatment of metal products, the vacuum pump 7 and the exhaust pipe 6 can be used to evacuate the interior of the vacuum chamber 21. Under the vacuum state, there is no air or other medium inside the vacuum chamber 21, which will reduce the area of ​​the inner tube 2 receiving heat transfer, thereby limiting heat conduction to a certain extent and playing a certain role in heat preservation; and the insulation layer 1 3 is an elastic felt-like body made of glass fiber with a diameter of only a few microns, and contains a large number of tiny air pores inside. These pores can effectively reduce air flow, thereby slowing down the heat transfer speed, so that it has a low thermal conductivity and good heat preservation performance, and can further insulate the inner tube 2 2 and the inner tube 1 1; at the same time, the insulation layer 2 4 is made of polyurethane, and the molecular chain of polyurethane contains a large number of hydrogen bonds. These hydrogen bonds can effectively hinder heat conduction, thereby improving the thermal insulation performance of polyurethane, and then strengthening the heat preservation of the inner tube 2 2 and the inner tube 1 1; through the cooperation of the above structure, the heat preservation effect of the pipeline when transporting metal products for heat treatment can be improved.

[0026] On the other hand, the anti-corrosion layer 5 made of polyethylene has good moisture resistance, electrical insulation, low temperature resistance, radiation resistance, good water resistance, chemical stability and other properties, so as to provide certain protection for the pipeline from the outside.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe for heat treatment of metal products, comprising an inner pipe (1), characterized in that: The outer surface of the inner tube one (1) is fixedly connected to the inner tube two (2), a vacuum chamber (21) is provided inside the inner tube two (2), a side of the inner tube two (2) away from the inner tube one (1) is fixedly connected to the insulation layer one (3), a side of the insulation layer one (3) away from the inner tube two (2) is fixedly connected to the insulation layer two (4), and a side of the insulation layer two (4) away from the insulation layer one (3) is fixedly connected to the anti-corrosion layer (5).

2. A pipe for heat treatment of metal products according to claim 1, characterized in that: The internal volume of the vacuum chamber (21) is connected to an exhaust pipe (6); one end of the exhaust pipe (6) away from the vacuum chamber (21) passes through the first insulation layer (3), the second insulation layer (4) and the anti-corrosion layer (5) and is then connected to a vacuum pump (7); the vacuum pump (7) is fixedly connected to the outer surface of the anti-corrosion layer (5).

3. A pipe for heat treatment of metal products according to claim 2, characterized in that: The input end of the anti-corrosion layer (5) is electrically connected to an external power source.

4. A pipe for heat treatment of metal products according to claim 1, characterized in that: A plurality of support columns (22) are fixedly connected to the inner side wall of the vacuum chamber (21).

5. A pipe for heat treatment of metal products according to claim 1, characterized in that: The material of the first insulation layer (3) is glass wool, and the material of the second insulation layer (4) is polyurethane.

6. A pipe for heat treatment of metal products according to claim 1, characterized in that: The material of the anti-corrosion layer (5) is polyethylene.

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