Heat preservation seamless steel pipe

Abstract

The utility model relates to the technical field of seamless steel tubes, and discloses a heat-preservation seamless steel tube which comprises an inner tube, an outer tube, a heat-preservation sleeve and a heat-preservation sleeve, the inner tube is cylindrical, and connecting structures connected with connecting flanges are arranged at the two ends of the inner tube; the heat preservation structure comprises a heat preservation part and a connecting part, the heat preservation part comprises a fixed sleeve, the fixed sleeve is fixedly installed on the outer wall of the inner pipe, the connecting part comprises a first limiting sleeve, the first limiting sleeve is arranged outside the inner pipe, and four sets of first arc-shaped limiting plates are fixedly installed on the inner wall of the first limiting sleeve; the heat preservation part further comprises four sets of heat preservation cotton layer plates arranged outside the inner pipe, the inner walls of the heat preservation cotton layer plates and the outer wall of the fixing sleeve are installed in a pasted mode, and the four sets of heat preservation cotton layer plates are installed among the four sets of first arc-shaped limiting plates in a clamped mode, so that the purposes of assembling and heat preservation of the device are achieved, and heat preservation materials are conveniently replaced; the use flexibility of the device is improved, steel pipes can be conveniently overhauled, the service life of the device is prolonged, and the heat preservation effect of the steel pipes is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of seamless steel pipes, and specifically relates to a heat-insulating seamless steel pipe. Background Technique

[0002] Seamless steel pipes are widely used in industries such as petroleum, chemical industry, electric power, and heating for transporting various media. However, when transporting high-temperature or low-temperature media, traditional seamless steel pipes often lack effective heat-insulating measures, resulting in rapid heat loss, which not only increases energy consumption but also affects the transportation efficiency and service effect of the media.

[0003] The utility model with the publication number CN220910706U discloses a corrosion-resistant seamless steel pipe, which belongs to the technical field of seamless steel pipes and includes an inner seamless steel pipe, an outer seamless steel pipe, and a moisture-proof sheath. A first corrosion-resistant layer is coated on the inner wall of the inner seamless steel pipe for one week. A second corrosion-resistant layer and a first heat-insulating layer are sequentially coated on the outer wall of the inner seamless steel pipe for one week. A third corrosion-resistant layer and a second heat-insulating layer are sequentially coated on the inner wall of the outer seamless steel pipe for one week. A compression-resistant layer is fixedly connected between the inner seamless steel pipe and the outer seamless steel pipe. The moisture-proof sheath is fixedly sleeved on the outer pipe part of the outer seamless steel pipe, and a moisture-absorbing cotton is arranged between the moisture-proof sheath and the outer seamless steel pipe in a fitting manner. Reinforcing plates and reinforcing steel bars are distributed in a circumferential and equidistant manner in the compression-resistant layer, and the reinforcing plates and the reinforcing steel bars are fixedly connected. A plurality of moisture-absorbing holes are evenly arranged on the surface of the moisture-proof sheath for one week, having the effect of improving corrosion resistance and compression resistance.

[0004] However, the above patent still has the following problems: The steel pipe will expand and contract thermally during use, the heat-insulating board inside the device is easily extruded and deformed, the fitting degree between the heat-insulating layer and the outer seamless steel pipe may decrease, affecting the overall heat-insulating effect, increasing the maintenance cost and time cost. The heat-insulating board inside the steel pipe needs to be replaced after long-term use to extend the heat-insulating effect of the steel pipe. Since the heat-insulating board is extruded inside the steel pipe, it is inconvenient to take out, and the device needs to be disassembled, making the use of the device inconvenient.

[0005] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0006] To solve the technical problem of inconvenient taking out of the moisture-proof board described above, the basic concept of the technical solution adopted by the present utility model is:

[0007] A heat-insulating seamless steel pipe, comprising:

[0008] An inner pipe, the inner pipe is in a cylindrical shape, and connection structures connected to connection flanges are arranged at both ends of the inner pipe;

[0009] Heat preservation structure, the heat preservation structure includes a heat preservation part and a connection part, the heat preservation part includes a fixed sleeve, the fixed sleeve is fixedly installed on the outer wall of the inner pipe, the connection part includes a first limiting sleeve, the first limiting sleeve is arranged outside the inner pipe, and four groups of first arc-shaped limiting plates are fixedly installed on the inner wall of the first limiting sleeve.

[0010] As a preferred embodiment of the present invention, the heat preservation part further includes four groups of heat preservation cotton layer plates arranged outside the inner pipe, the inner wall of the heat preservation cotton layer plate is adhesively installed with the outer wall of the fixed sleeve, and the four groups of heat preservation cotton layer plates are snap-fitted between the four groups of first arc-shaped limiting plates.

[0011] As a preferred embodiment of the present invention, the connection part further includes a second limiting sleeve arranged outside the inner pipe, eight groups of limiting grooves are opened inside the second limiting sleeve, and the first arc-shaped limiting plate is nested inside the second limiting sleeve.

[0012] As a preferred embodiment of the present invention, the outer wall of the first limiting sleeve is in close contact with the inner wall of the second limiting sleeve, eight groups of moisture-proof plates are arranged outside the first limiting sleeve, and the moisture-proof plates are snap-fitted inside the limiting grooves.

[0013] As a preferred embodiment of the present invention, the outer wall of the heat preservation cotton layer plate is in close contact with the inner wall of the first limiting sleeve, the inner wall of the first arc-shaped limiting plate is in close contact with the outer wall of the fixed sleeve, and the fixed sleeve is nested inside the first arc-shaped limiting plate.

[0014] As a preferred embodiment of the present invention, the connection structure includes a first outer pipe fixedly installed at one end of the inner pipe, and a second outer pipe is fixedly installed at the other end of the inner pipe.

[0015] As a preferred embodiment of the present invention, glue is applied to the outer walls of the moisture-proof plates and the heat preservation cotton layer plates.

[0016] The present invention has the following beneficial effects compared with the prior art:

[0017] 1. It achieves the purpose of assembling and heat-preserving the device, facilitates the replacement of heat-preserving materials, improves the flexibility of device use, facilitates the maintenance of the steel pipe, prolongs the service life of the device, and improves the heat-preserving effect of the steel pipe.

[0018] 2. It achieves the purpose of moisture-proof treatment of the device, installs and disassembles the moisture-proof plates, absorbs the humid gas inside the steel pipe, maintains the environmental humidity inside the steel pipe, reduces the corrosion and rust of the steel pipe, and improves the durability of the device.

[0019] 3. It achieves the purpose of connecting and installing multiple groups of steel pipes, improves the connection effect between the filler and the inner wall of the steel pipe, reduces the gaps, and improves the heat-preserving effect of the device.

[0020] The following further describes in detail the specific embodiments of the present utility model in conjunction with the accompanying drawings. Description of the Drawings

[0021] In the drawings:

[0022] Figure 1 is a schematic structural diagram of the second limit sleeve of the present utility model;

[0023] Figure 2 is a hierarchical diagram of the present utility model;

[0024] Figure 3 is a disassembled diagram of the present utility model;

[0025] Figure 4 is a side view of the present utility model;

[0026] Figure 5 is a sectional view of the present utility model;

[0027] Figure 6 is a front view of the present utility model.

[0028] In the figure: 10, inner pipe; 11, first outer pipe; 12, second outer pipe; 13, fixed sleeve; 14, heat-insulating cotton layer board; 15, first limit sleeve; 16, first arc-shaped limit plate; 17, moisture-proof board; 18, second limit sleeve; 19, limit groove. Specific Embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model.

[0030] Embodiment 1: A heat-insulating seamless steel pipe, specifically as Figure 1 , Figure 2 and Figure 3 shown, including an inner pipe 10, the inner pipe 10 is cylindrical, and connection structures for connecting with connection flanges are provided at both ends of the inner pipe 10; a heat-insulating structure, the heat-insulating structure includes a heat-insulating part and a connection part, the heat-insulating part includes a fixed sleeve 13, the fixed sleeve 13 is fixedly installed on the outer wall of the inner pipe 10, the connection part includes a first limit sleeve 15, the first limit sleeve 15 is arranged outside the inner pipe 10, and four groups of first arc-shaped limit plates 16 are fixedly installed on the inner wall of the first limit sleeve 15. The steel pipe is heat-insulated and protected through the heat-insulating structure.

[0031] Specifically as Figure 1 , Figure 4 and Figure 5As shown, the heat preservation part further includes four groups of heat preservation cotton layer boards 14 arranged outside the inner pipe 10. The inner wall of the heat preservation cotton layer board 14 is adhesively installed with the outer wall of the fixed sleeve 13, and the four groups of heat preservation cotton layer boards 14 are snap-fitted between the four groups of first arc-shaped limiting plates 16. The inner pipe 10 is wrapped by the fixed sleeve 13, and the inner pipe 10 is heat-preserved by the fixed sleeve 13 and the heat preservation cotton layer boards 14.

[0032] Specifically, as Figure 1 , Figure 3 , Figure 5 and Figure 6 shown, the connecting part further includes a second limiting sleeve 18 arranged outside the inner pipe 10. Eight groups of limiting grooves 19 are opened inside the second limiting sleeve 18, and the first arc-shaped limiting plate 16 is nested inside the second limiting sleeve 18. The four groups of heat preservation cotton layer boards 14 are snap-fitted between the four groups of first arc-shaped limiting plates 16.

[0033] According to the above, through the structures of the inner pipe 10, the fixed sleeve 13, the heat preservation cotton layer boards 14, the first limiting sleeve 15, the first arc-shaped limiting plate 16, the second limiting sleeve 18 and the limiting grooves 19, the purpose of assembling and heat-preserving the device is achieved, which is convenient for replacing the heat preservation material, improves the flexibility of the device in use, is convenient for overhauling the steel pipe, prolongs the service life of the device, and improves the heat preservation effect of the steel pipe.

[0034] Embodiment 2: On the basis of Embodiment 1, specifically, as Figure 1 , Figure 2 and Figure 3 shown, the outer wall of the first limiting sleeve 15 is in close contact with the inner wall of the second limiting sleeve 18. Eight groups of moisture-proof boards 17 are arranged outside the first limiting sleeve 15, and the moisture-proof boards 17 are snap-fitted inside the limiting grooves 19. The moisture-proof boards 17 are adhesively installed on the outer wall of the first limiting sleeve 15 and snap-fitted inside the limiting grooves 19+.

[0035] Specifically, as Figure 1 and Figure 4 shown, the outer wall of the heat preservation cotton layer board 14 is in close contact with the inner wall of the first limiting sleeve 15, the inner wall of the first arc-shaped limiting plate 16 is in close contact with the outer wall of the fixed sleeve 13, and the fixed sleeve 13 is nested inside the first arc-shaped limiting plate 16. The fixed sleeve 13 is nested inside the first arc-shaped limiting plate 16, and the first arc-shaped limiting plate 16 is nested inside the second limiting sleeve 18.

[0036] Based on the above, through the structures of the fixed sleeve 13, the heat-insulating cotton layer board 14, the first limiting sleeve 15, the first arc-shaped limiting board 16, the moisture-proof board 17, the second limiting sleeve 18 and the limiting groove 19, the purpose of moisture-proof treatment for the device is achieved. The moisture-proof board 17 is installed and disassembled to absorb the humid gas inside the steel pipe, maintain the environmental humidity inside the steel pipe, reduce the corrosion and rusting condition of the steel pipe, and improve the durability of the device.

[0037] Embodiment 3: On the basis of Embodiment 1 and Embodiment 2, specifically as Figure 1 、 Figure 3 and Figure 6 shown, the connection structure includes a first outer pipe 11 fixedly installed at one end of the inner pipe 10, and a second outer pipe 12 is fixedly installed at the other end of the inner pipe 10. Multiple groups of inner pipes 10 are connected by connecting the first outer pipe 11 and the second outer pipe 12 to the connecting flange.

[0038] Specifically as Figure 1 and Figure 3 shown, glue is coated on the outer walls of both the moisture-proof board 17 and the heat-insulating cotton layer board 14. The heat-insulating cotton layer board 14 and the moisture-proof board 17 are connected to the inner wall of the steel pipe through the glue.

[0039] In summary, through the structures of the first outer pipe 11, the second outer pipe 12, the heat-insulating cotton layer board 14 and the moisture-proof board 17, the purpose of connecting and installing multiple groups of steel pipes is achieved, the connection effect between the filler and the inner wall of the steel pipe is improved, the gaps are reduced, and the heat-insulating effect of the device is improved.

[0040] Working principle: The heat-insulating seamless steel pipe mainly consists of an inner pipe 10 and a heat-insulating structure surrounding it. The inner pipe 10, as the main structure, is cylindrical, and both ends are designed with connection structures adapted to the connecting flanges, facilitating the connection of multiple steel pipes. The fixing sleeve 13 is directly fixed on the outer wall of the inner pipe 10 and serves as the first layer of the heat-insulating layer, providing a preliminary heat-insulating effect. The heat-insulating cotton layer board 14 is pasted on the outer wall of the fixing sleeve 13 and clamped between the first arc-shaped limiting plates 16 to form a thicker heat-insulating layer, further enhancing the heat-insulating performance. The first limiting sleeve 15 and the second limiting sleeve 18 ensure the stability and tightness of the heat-insulating structure through the nested relationship and the clamping of the limiting groove 19 and the moisture-proof board 17. The first arc-shaped limiting plate 16 not only fixes the heat-insulating cotton layer board 14 but also enhances the overall strength of the heat-insulating structure. Through the double heat-insulating layer design of the fixing sleeve 13 and the heat-insulating cotton layer board 14, the heat exchange between the internal and external environments is effectively isolated, achieving the purpose of heat insulation. The high heat-insulating performance of the heat-insulating cotton layer board 14 further improves the heat-insulating effect. The setting of the moisture-proof board 17 effectively prevents the moisture in the external environment from invading the heat-insulating layer, avoiding the reduction of the heat-insulating performance or damage of the heat-insulating material due to moisture absorption. The close cooperation between the moisture-proof board 17 and the first limiting sleeve 15 and the limiting groove 19 ensures the moisture-proof effect. Through the design of the first outer pipe 11 and the second outer pipe 12, multiple steel pipes can be conveniently connected together through the connecting flanges to form a longer pipeline system, improving the installation flexibility and facilitating the maintenance and replacement of the pipeline. Glue is applied to the outer walls of the moisture-proof board 17 and the heat-insulating cotton layer board 14 to enhance the adhesion of these components to the inner wall of the steel pipe, improving the overall stability and durability of the heat-insulating structure.

[0041] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A heat-insulating seamless steel pipe, characterized in that, Including: An inner tube (10), the inner tube (10) is cylindrical, and connection structures for connecting with connection flanges are provided at both ends of the inner tube (10). A thermal insulation structure, the thermal insulation structure includes a thermal insulation part and a connection part, the thermal insulation part includes a fixed sleeve (13), the fixed sleeve (13) is fixedly installed on the outer wall of the inner tube (10), the connection part includes a first limiting sleeve (15), the first limiting sleeve (15) is arranged outside the inner tube (10), and four groups of first arc-shaped limiting plates (16) are fixedly installed on the inner wall of the first limiting sleeve (15).

2. The heat-insulating seamless steel pipe according to claim 1, wherein The thermal insulation part further includes four groups of thermal insulation cotton layer boards (14) arranged outside the inner tube (10), the inner wall of the thermal insulation cotton layer board (14) is adhesively installed with the outer wall of the fixed sleeve (13), and the four groups of thermal insulation cotton layer boards (14) are snap-fitted between the four groups of first arc-shaped limiting plates (16).

3. The heat-insulating seamless steel pipe according to claim 1, wherein, The connection part further includes a second limiting sleeve (18) arranged outside the inner tube (10), eight groups of limiting grooves (19) are formed inside the second limiting sleeve (18), and the first arc-shaped limiting plate (16) is nested inside the second limiting sleeve (18).

4. The heat-insulating seamless steel pipe according to claim 1, wherein, The outer wall of the first limiting sleeve (15) is in close contact with the inner wall of the second limiting sleeve (18), eight groups of moisture-proof boards (17) are arranged outside the first limiting sleeve (15), and the moisture-proof boards (17) are snap-fitted inside the limiting grooves (19).

5. The heat-insulating seamless steel pipe according to claim 2, characterized in that, The outer wall of the thermal insulation cotton layer board (14) is in close contact with the inner wall of the first limiting sleeve (15), the inner wall of the first arc-shaped limiting plate (16) is in close contact with the outer wall of the fixed sleeve (13), and the fixed sleeve (13) is nested inside the first arc-shaped limiting plate (16).

6. The heat-insulating seamless steel pipe according to claim 1, wherein, The connection structure includes a first outer tube (11) fixedly installed at one end of the inner tube (10), and a second outer tube (12) is fixedly installed at the other end of the inner tube (10).

7. The heat-insulating seamless steel pipe according to claim 4, characterized in that, Glue is applied to the outer walls of the moisture-proof board (17) and the thermal insulation cotton layer board (14).

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