A protection sleeve for a compression air pipe expansion joint of an aluminum electrolysis cell and a mounting method

Abstract

The application discloses a kind of aluminium electrolysis tank compressed air pipeline expansion joint protective sleeve, including upper protective sleeve, lower protective sleeve, pipeline body is equipped between the upper protective sleeve and lower protective sleeve;The structure of the upper protective sleeve and lower protective sleeve is identical;The upper protective sleeve includes shell, and the shell inner cavity is equipped with the filler that is contacted with the expansion joint of pipeline body, and the both sides of the shell are equipped with connecting structure respectively, and the upper protective sleeve is connected with lower protective sleeve by connecting structure.The filler in the upper protective sleeve and lower protective sleeve of the application isolates high temperature, to avoid the expansion joint of compressed air pipeline from high temperature damage.

Description

Technical Field

[0001] This invention belongs to the field of expansion joints for compressed air pipelines in aluminum electrolysis cells, and specifically relates to a protective sleeve for expansion joints in compressed air pipelines of aluminum electrolysis cells. Background Technology

[0002] Compressed air in the electrolytic cell workshop is a crucial factor restricting the production of electrolytic aluminum. Without compressed air, significant economic losses can occur within a short period. Therefore, protecting the expansion joints of the compressed air pipelines in aluminum electrolytic cells is one of the important factors affecting aluminum electrolysis production. In the event of a furnace leak in the electrolytic cell workshop, molten aluminum will flow down into the electrolytic cell. The expansion joints of the compressed air pipelines below the cell will be subjected to high temperatures and other damage. Because of the pressure inside the pipelines, exposure to high temperatures could lead to explosions or other major safety accidents. Furthermore, the cooling time of molten aluminum will significantly hinder maintenance work, making it impossible to guarantee the rapid restoration of normal compressed air supply.

[0003] Therefore, in order to solve the above problems, we urgently need a protective sleeve that can effectively protect the expansion joints of the compressed air pipeline of aluminum electrolysis cells from high temperature damage. Summary of the Invention

[0004] To address the above problems, this invention discloses a protective sleeve for an expansion joint of compressed air pipeline in an aluminum electrolysis cell, comprising an upper protective sleeve and a lower protective sleeve, wherein a pipeline body is provided between the upper and lower protective sleeves;

[0005] The upper protective sleeve and the lower protective sleeve have the same structure;

[0006] The upper protective sleeve includes a shell, the inner cavity of which is filled with a filler material that contacts the expansion joint of the pipe body, and the shell is provided with connecting structures on both sides. The upper protective sleeve is connected to the lower protective sleeve through the connecting structures.

[0007] Furthermore, the housing includes a bottom plate, and sealing plates are respectively provided at both ends of the bottom plate. The sealing plates and the bottom plate form a receiving cavity, and the receiving cavity is filled with filler material.

[0008] Furthermore, the base plate is arc-shaped, the end of the sealing plate that contacts the base plate is arc-shaped, and the end of the sealing plate away from the base plate is provided with an arc-shaped hole.

[0009] Furthermore, the wall of the arc-shaped hole is fitted to the outer wall of the pipe body.

[0010] Furthermore, the connection structure includes connecting plates on both sides of the base plate, the connecting plates having connecting holes, and fasteners being installed in the connecting holes.

[0011] Furthermore, the connecting plate includes a support plate connected to the base plate and a fixing plate connected to the support plate, and the fixing plate is provided with connecting holes.

[0012] Furthermore, the fixing plate has connecting holes arrayed along its own transverse centerline.

[0013] Furthermore, the vertical center lines of the upper protective sleeve and the lower protective sleeve are aligned.

[0014] Furthermore, the filler is asbestos.

[0015] Another objective of this invention is to disclose a method for installing a protective sleeve for an expansion joint in a compressed air pipeline of an aluminum electrolysis cell, comprising the following steps:

[0016] Weld sealing plates to both ends of the base plate, then weld connecting plates to both sides of the base plate, drill connecting holes, and then stuff filler into the cavity formed by the base plate and sealing plates to complete the installation of the upper protective sleeve. Repeat this installation process to complete the installation of the lower protective sleeve.

[0017] Next, attach the upper and lower protective sleeves to the pipe body in sequence and connect them with fasteners to complete the installation.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1) The present invention isolates high temperature by using the filler material inside the upper and lower protective sleeves to prevent the expansion joints of the compressed air pipeline from being damaged by high temperature.

[0020] 2) The present invention has a simple structure, is easy to manufacture, saves time and effort, and avoids safety hazards.

[0021] 3) This invention is easy to disassemble and replace. The protective sleeve can be removed without waiting for the aluminum liquid to cool down, allowing for direct inspection of the pipeline, which improves maintenance efficiency and ensures that compressed air can be restored to normal delivery in a short time.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure according to Embodiment 1 of the present invention is shown;

[0025] Figure 2 A perspective view according to Embodiment 1 of the present invention is shown;

[0026] Figure 3 A schematic diagram of the structure for removing fasteners according to Embodiment 1 of the present invention is shown;

[0027] Figure 4 A schematic diagram of the structure of a telescopic joint according to Embodiment 1 of the present invention is shown;

[0028] Figure description: 1 Upper protective sleeve, 11 Housing, 111 Base plate, 112 Sealing plate, 113 Arc-shaped hole, 114 Accommodation cavity, 115 Filler, 12 Connecting plate, 121 Supporting plate, 122 Fixing plate, 123 Connecting hole, 124 Fastener, 2 Lower protective sleeve, 3 Pipe body, 31 Expansion joint. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Figure 1 A structural schematic diagram according to Embodiment 1 of the present invention is shown. Figure 1 As shown, a protective sleeve for an expansion joint of compressed air pipeline in an aluminum electrolysis cell includes an upper protective sleeve 1 and a lower protective sleeve 2, with a pipeline body 3 provided between the upper protective sleeve 1 and the lower protective sleeve 2.

[0031] The upper protective sleeve 1 and the lower protective sleeve 2 have the same structure;

[0032] The upper protective sleeve 1 includes a shell 11, the inner cavity of which is provided with a filler 115 that contacts the expansion joint 31 of the pipe body 3, and the shell 11 has connecting structures on both sides. The upper protective sleeve 1 is connected to the lower protective sleeve 2 through the connecting structures.

[0033] The protective sleeve for the expansion joint of the compressed air pipeline of the aluminum electrolysis cell of the present invention tightly wraps the expansion joint 31 with the upper protective sleeve 1 and the lower protective sleeve 2, so that the filler 115 fits the expansion joint 31 in a circumferential manner. This can effectively protect the expansion joint 31 of the compressed air pipeline body 3 of the aluminum electrolysis cell from high temperature damage and greatly reduce the occurrence of safety incidents of the expansion joint 31 of the compressed air pipeline body 3.

[0034] Specifically, both the upper protective sleeve 1 and the lower protective sleeve 2 are made of scrap steel, which saves costs; since scrap steel is an existing technology, it will not be described in detail here.

[0035] In some embodiments, the housing 11 includes a bottom plate 111, and sealing plates 112 are respectively provided at both ends of the bottom plate 111. The sealing plates 112 and the bottom plate 111 form a receiving cavity 114, and the receiving cavity 114 is provided with filler material 115. The receiving cavity 114 provides a space for the filler material 115, and the sealing plates 112 can prevent the filler material 115 from running out from both sides of the housing 11, providing conditions for the filler material 115 to fit circumferentially with the expansion joint 31.

[0036] Figure 3 A schematic diagram of the structure with fastener 124 removed according to Embodiment 1 of the present invention is shown. Figure 3 As shown, in some embodiments, the base plate 111 is arc-shaped, the end of the sealing plate 112 that contacts the base plate 111 is arc-shaped, and the end of the sealing plate 112 that is away from the base plate 111 is provided with an arc-shaped hole 113; this facilitates welding the base plate 111 and the sealing plate 112 to form an accommodating cavity 114.

[0037] Figure 2 A perspective view according to Embodiment 1 of the present invention is shown. Figure 2 As shown, specifically, the arc-shaped hole 113 and the arc-shaped base plate 111 can better fit the outer wall of the pipe body 3, providing conditions for the filler 115 to circumferentially wrap the expansion joint 31.

[0038] Figure 1 A structural schematic diagram according to Embodiment 1 of the present invention is shown. Figure 1 As shown, in some embodiments, the wall of the arc-shaped hole 113 is fitted to the outer wall of the pipe body 3; because the arc-shaped hole 113 is fitted to the pipe body 3, the filler 115 is circumferentially fitted to the expansion joint 31, which can completely wrap the expansion joint 31, thereby isolating it from the outside world and playing a protective role, greatly reducing the occurrence of safety incidents of the expansion joint 31 of the compressed air pipe body 3.

[0039] In some embodiments, the connection structure includes connecting plates 12 disposed on both sides of the base plate 111, the connecting plates 12 having connecting holes 123, and fasteners 124 disposed in the connecting holes 123; the upper protective sleeve 1 and the lower protective sleeve 2 are fixed by the fasteners 124, so that they can be completely fitted to the outer wall of the pipe body 3, providing conditions for the filler 115 to circumferentially wrap the expansion joint 31.

[0040] Figure 4A schematic diagram of the expansion joint 31 according to Embodiment 1 of the present invention is shown. Specifically, the pipe body 3 and the expansion joint 31 are connected. Both the pipe body 3 and the expansion joint 31 are existing technologies, so the structure of the pipe body 3 and the expansion joint 31 and their connection structure will not be described in detail here.

[0041] Specifically, fastener 124 is optional but not limited to bolts; bolts are existing technology, so they will not be discussed further here.

[0042] In some embodiments, the connecting plate 12 includes a support plate 121 connected to the base plate 111 and a fixing plate 122 connected to the support plate 121. The fixing plate 122 is provided with a connecting hole 123. The support plate 121 serves to connect the base plate 111, and the fixing plate 122 serves to connect the upper protective sleeve 1 and the lower protective sleeve 2.

[0043] In some embodiments, the fixing plate 122 has connecting holes 123 arrayed along its own transverse center line; the multiple connecting holes 123 can be used to fix the upper protective sleeve 1 and the lower protective sleeve 2, ensuring the stability of the entire protective sleeve.

[0044] In some embodiments, the vertical center lines of the upper protective sleeve 1 and the lower protective sleeve 2 are aligned, which allows the filler 115 to circumferentially wrap around the expansion joint 31, ensuring that the expansion joint 31 is isolated from the outside world.

[0045] In some embodiments, the filler 115 is asbestos. Asbestos has high fire resistance, electrical insulation, and thermal insulation properties, making it an important fireproof, insulating, and heat-insulating material. Therefore, it protects the expansion joint 31 from the high temperature damage caused by molten aluminum, preventing greater safety accidents. Since asbestos is existing technology, it will not be described in detail here.

[0046] The working principle of the protective sleeve for the expansion joint of the compressed air pipeline of the aluminum electrolysis cell is as follows:

[0047] Weld sealing plates 112 to both ends of the base plate 111, and then weld support plates 121 to both sides of the base plate 111. Drill connection holes 123 on the fixing plate 122, and then insert filler 115 into the accommodating cavity 114 formed by the base plate 111 and the sealing plates 112 to complete the installation of the upper protective sleeve 1. Repeat this installation process to complete the installation of the lower protective sleeve 2. Cover the upper part of the expansion joint 31 and part of the pipe body 3 with the side of the upper protective sleeve 1 containing filler 115, so that the expansion joint 31 is completely accommodated in the accommodating cavity 114, and the filler 115 completely covers the upper part of the expansion joint 31. Then attach the side of the lower protective sleeve 2 containing filler 115 to the lower part of the expansion joint 31 and part of the pipe body 3, that is, the upper protective sleeve 1. Below, the lower part of the expansion joint 31 is also completely housed within the receiving cavity 114 of the lower protective sleeve 2 and wrapped by the filler material 115. Then, the upper protective sleeve 1 and the lower protective sleeve 2 are connected by fasteners 124 through the connecting holes 123, thus fixing the upper protective sleeve 1 and the lower protective sleeve 2, ensuring that the filler material 115 always wraps around the expansion joint 31 of the pipe body 3. The filler material 115 in the upper protective sleeve 1 and the lower protective sleeve 2 isolates high temperatures, and the connection between the pipe body 3 and the expansion joint 31 is completely wrapped by the filler material 115. Therefore, the expansion joint 31 of the compressed air pipe body 3 is completely protected from high temperature damage. Moreover, installation and disassembly are extremely convenient. The protective sleeve can be removed without waiting for the aluminum liquid to cool down, and the pipe body 3 can be directly inspected. Therefore, maintenance efficiency is improved, ensuring that compressed air can be restored to normal delivery in a short time, and safety hazards are avoided.

[0048] A method for installing a protective sleeve for an expansion joint in an aluminum electrolysis cell compressed air pipeline includes the following steps:

[0049] Weld sealing plates 112 to both ends of the base plate 111, then weld connecting plates 12 to both sides of the base plate 111, drill connecting holes 123, repeat the process to complete the installation of the housing 11, then insert filler material 115 into the inner cavity of the housing 11 to complete the installation of the upper protective sleeve 1 and the lower protective sleeve 2.

[0050] Next, attach the upper protective sleeve 1 and the lower protective sleeve 2 to the pipe body 3 in sequence, and connect them with fasteners 124 so that the filler 115 completely covers the expansion joint 31, thus completing the installation.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A protective sleeve for an expansion joint of a compressed air pipeline in an aluminum electrolysis cell, characterized in that, It includes an upper protective sleeve (1) and a lower protective sleeve (2), and a pipe body (3) is provided between the upper protective sleeve (1) and the lower protective sleeve (2). The upper protective sleeve (1) and the lower protective sleeve (2) have the same structure; The upper protective sleeve (1) includes a shell (11), the inner cavity of which is provided with a filler (115) that contacts the expansion joint (31) of the pipe body (3). The filler (115) is circumferentially attached to the outer wall of the expansion joint (31) and forms a fully enclosed isolation layer. The shell (11) is provided with connecting structures on both sides. The upper protective sleeve (1) is connected to the lower protective sleeve (2) through the connecting structures. The shell (11) includes a bottom plate (111), and the bottom plate (111) is provided with sealing plates at both ends. 112), the sealing plate (112) is welded to the bottom plate (111) to form a receiving cavity (114), the receiving cavity (114) is filled with filler (115), the bottom plate (111) is arc-shaped, the end of the sealing plate (112) that contacts the bottom plate (111) is an arc-shaped end, the end of the sealing plate (112) away from the bottom plate (111) is provided with an arc-shaped hole (113), the hole wall of the arc-shaped hole (113) is in contact with the outer wall of the pipe body (3), and the filler (115) is asbestos; The connection structure includes connecting plates (12) on both sides of the base plate (111), the connecting plates (12) are provided with connecting holes (123), and fasteners (124) are provided in the connecting holes (123). The connecting plate (12) includes a support plate (121) connected to the base plate (111) and a fixing plate (122) connected to the support plate (121). The fixing plate (122) is provided with a connecting hole (123).

2. The protective sleeve for the expansion joint of the compressed air pipeline of an aluminum electrolysis cell according to claim 1, characterized in that, The fixing plate (122) has connecting holes (123) arranged along its own transverse center line.

3. The protective sleeve for the expansion joint of the compressed air pipeline of an aluminum electrolysis cell according to claim 1, characterized in that, The vertical center lines of the upper protective sleeve (1) and the lower protective sleeve (2) are aligned.

4. The installation method of the protective sleeve for the expansion joint of the compressed air pipeline of an aluminum electrolysis cell according to any one of claims 1 to 3, characterized in that, Includes the following steps: Weld sealing plates (112) to both ends of the base plate (111), then weld connecting plates (12) to both sides of the base plate (111), drill connecting holes (123), and then insert filler (115) into the accommodating cavity (114) formed by the base plate (111) and sealing plates (112) to complete the installation of the upper protective sleeve (1). Repeat the installation process to complete the installation of the lower protective sleeve (2). Next, attach the upper protective sleeve (1) and the lower protective sleeve (2) to the pipe body (3) in sequence, and connect them with fasteners (124) to complete the installation.

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