Annealing furnace for nickel wire mesh production

Abstract

The invention relates to an annealing furnace for producing nickel wire mesh applied in the field of annealing devices. Through the coordinated arrangement of an annealing rack, a feeding frame and a synchronous driving mechanism, the synchronous driving mechanism can be used to drive the annealing rack and the feeding frame to move synchronously horizontally, so as to realize automatic and continuous feeding and discharging. The sizes of the feeding port and the discharging port are set to meet the vertical drop of a nickel wire mesh, which can greatly reduce the overflow of heat inside the annealing furnace body, thereby saving annealing energy consumption. With the arrangement of a damping plate and a deforming member, the deforming member can be extended in a feeding area with a relatively low temperature, so that the damping plate is in an open state. At this time, the nickel wire mesh dropped from the feeding frame can be stably clamped by the damping plate and is not easy to rebound due to collision with the bottom of the annealing furnace body. When the annealing rack moves horizontally to the high temperature area of ​​the annealing furnace body with the nickel wire mesh, the deforming member is contracted to make the damping plate in a closed state, and the nickel wire mesh loses the clamping effect of the damping plate and can be smoothly dropped from the discharging port, so as to realize automatic discharging.

Description

Technical Field

[0001] The invention relates to an annealing furnace, in particular to an annealing furnace for producing nickel wire mesh applied in the field of annealing devices. Background Art

[0002] Annealing is a metal heat treatment process that refers to slowly heating the metal to a certain temperature, maintaining it for a sufficient time, and then cooling it at an appropriate rate. The purpose is to reduce hardness and improve machinability; reduce residual stress, stabilize size, reduce deformation and crack tendency, refine grains, adjust structure, and eliminate structural defects.

[0003] After nickel steaming and rolling, the nickel wire mesh needs to be annealed to improve the stability, corrosion resistance and mechanical properties of the nickel wire mesh. For example, the patent application number CN202220370897.7 discloses a nickel wire mesh production annealing furnace that is convenient for wire clamping and positioning, including a main body, a placement cavity is provided inside the main body, and a baffle is rotatably connected to one side of the main body, two support plates are symmetrically installed inside the placement cavity, a clamp is installed between the two support plates, and a connecting groove is provided on one side of the clamp close to the two support plates, and a heating plate is installed at the bottom and top of the inner wall of the placement cavity, and a magnetic plate is installed on the top of the two support plates. The clamp is engaged with the two support plates through the connecting groove, so that the number of clamps required by the user is fixed inside the placement cavity, and the clamp is pressed against the nickel wire mesh, so that the device can be adjusted according to the number of nickel wire meshes, and different numbers of nickel wire meshes can be fixed, which greatly reduces the difficulty of fixing the nickel wire mesh, improves the fixing efficiency of the nickel wire mesh, and improves the scope of use of the device.

[0004] Based on the above search and in combination with the prior art, it is found that the problem with the annealing furnace similar to the one disclosed above in the prior art is that, in order to facilitate the removal and placement of the nickel wire mesh, the size of the furnace mouth is usually set larger, resulting in more heat dissipation in the furnace during the process of removing and placing the nickel wire mesh, resulting in higher annealing energy consumption. Therefore, an annealing furnace for nickel wire mesh production is proposed to improve the above problem. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the size of the furnace mouth is relatively large, resulting in a large amount of heat dissipation in the furnace during the process of taking and placing the nickel wire mesh, resulting in a large annealing energy consumption.

[0006] In order to solve the above problems, the present invention provides an annealing furnace for nickel wire mesh production, comprising an annealing furnace body with a built-in heating structure:

[0007] An annealing rack is arranged inside the annealing furnace body, and the annealing rack is horizontally slidably installed inside the annealing furnace body;

[0008] A material unloading frame is arranged on the upper side of the annealing furnace body, and the material unloading frame is horizontally slidably installed on the top of the annealing furnace body;

[0009] A plurality of partition plates are installed at equal distances on the inner side of the blanking frame along its horizontal moving direction;

[0010] A synchronous driving mechanism for driving the annealing rack and the unloading frame to move synchronously and horizontally is installed on one side of the annealing furnace body;

[0011] A feed port is provided at the top of one side of the annealing furnace body, and the diameter of the feed port is the same as the gap between two adjacent partition plates. A discharge port is provided at the bottom of the other side of the annealing furnace body, and the diameter of the discharge port is the same as that of the feed port.

[0012] The temperature inside the annealing furnace body increases sequentially from the feed inlet to the discharge outlet.

[0013] In the annealing furnace produced by the above-mentioned nickel wire mesh, a synchronous driving mechanism can be used to drive the annealing rack and the unloading frame to move synchronously horizontally, thereby realizing automatic continuous loading and unloading, and the sizes of the feed port and the discharge port are set to be able to meet the needs of a nickel wire mesh falling vertically, which can greatly reduce the overflow of heat inside the annealing furnace body, thereby saving annealing energy consumption.

[0014] As a further supplement to the present application, the annealing rack includes two fixed plates and a plurality of partition columns;

[0015] A plurality of partition columns are arranged in a rectangular array and fixed between two fixed plates;

[0016] The fixing plate is connected with the synchronous driving mechanism.

[0017] As a further supplement to the present application, a limiting slide block is installed at the side end of the fixed plate, and a limiting slide groove for sliding the limiting slide block is horizontally arranged on the inner side wall of the annealing furnace body.

[0018] As a further supplement to the present application, the synchronous drive mechanism includes a linkage assembly, a first drive screw and a second drive screw;

[0019] The linkage assembly is installed on the outer side wall of the annealing furnace body, and a protective shell cover is installed on the outer side wall of the annealing furnace body and is arranged outside the linkage assembly;

[0020] The first driving screw is horizontally rotatably mounted on the top of the annealing furnace body and is threadedly penetrated through the blanking frame;

[0021] The second driving screw is horizontally rotatably installed on the inner side of the annealing furnace body and is threadedly penetrated through the limiting slider;

[0022] The first drive screw and the second drive screw are both connected to the linkage assembly.

[0023] As a further supplement to the present application, the linkage assembly includes a drive motor, a drive pulley and a drive belt;

[0024] The driving motor is fixed to the inner side of the protective shell, and a plurality of driving pulleys are provided, and are all rotatably mounted on the annealing furnace body, and are coaxially fixed with the first driving screw and the second driving screw respectively, and one of the driving pulleys is coaxially fixed with the output shaft of the driving motor;

[0025] The transmission belt is sleeved on the outer sides of a plurality of transmission pulleys at the same time.

[0026] As another improvement of the present application, a shaft sleeve is rotatably sleeved on the outer side of the partition column.

[0027] As another improvement of the present application, damping plates are rotatably mounted on the end surfaces of the two fixed plates that are close to each other, and the upper end of the damping plate is rotatably connected to the fixed plate, and a deformable member is fixed between the lower end of the damping plate and the fixed plate.

[0028] As another improvement supplement of the present application, the deformable part is a memory alloy, and its property is to elongate at low temperature and contract at high temperature, so that in the loading area with relatively low temperature, the deformable part can be extended to make the damping plate in an open state. At this time, the nickel wire mesh falling from the unloading frame can be stably clamped by the damping plate and is not easy to rebound due to collision with the bottom of the annealing furnace body; when the annealing rack moves horizontally to the high temperature zone of the annealing furnace body with the nickel wire mesh, the deformable part can be contracted to make the damping plate in a closed state, and the nickel wire mesh loses the clamping effect of the damping plate and can fall smoothly from the discharge port to realize automatic discharge.

[0029] As another improvement of the present application, a sealing cover plate is provided on the lower side of the feed port and the discharge port, one end of the sealing cover plate is fixed to the annealing furnace body by a torsion spring, the sealing cover plate can be opened under the pressure of the nickel wire mesh, and after the pressure of the nickel wire mesh is lost, it is closed under the resetting action of the torsion spring, thereby maintaining the sealing of the feed port and the discharge port, and further reducing the overflow of heat inside the annealing furnace body.

[0030] As another improvement of the present application, a smoke exhaust pipe is installed at the side end of the annealing furnace body, a water tank is fixed to the side end of the annealing furnace body, the smoke exhaust pipe runs through the water tank, and the part of the smoke exhaust pipe located inside the water tank is coiled.

[0031] Through the coordinated arrangement of the annealing rack, the feeding frame and the synchronous driving mechanism, the synchronous driving mechanism can be used to drive the annealing rack and the feeding frame to move synchronously horizontally, and the nickel wire mesh in the feeding frame falls from the feeding port to the annealing rack in sequence, so as to realize automatic and continuous feeding, and the sizes of the feeding port and the discharging port are set to meet the needs of a nickel wire mesh falling vertically, which can greatly reduce the overflow of heat inside the annealing furnace body, thereby saving annealing energy consumption; in addition, with the arrangement of the damping plate and the deformation member, the deformation member can be extended in the feeding area with relatively low temperature, so that The damping plate is in an open state, at which time the nickel wire mesh dropped from the unloading frame can be stably clamped by the damping plate, and is not prone to rebound due to collision with the bottom of the annealing furnace body; when the annealing rack moves horizontally with the nickel wire mesh to the high-temperature zone of the annealing furnace body, the deformation piece contracts to make the damping plate in a closed state, and the nickel wire mesh loses the clamping effect of the damping plate and can fall smoothly from the discharge port to achieve automatic discharge; in addition, by passing the exhaust pipe through the water tank, the heat along the inside of the exhaust pipe can be recycled to heat the books in the water tank, which is more energy-efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the first embodiment of the present application;

[0033] Figure 2 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present application without the water storage tank;

[0034] Figure 3 This is a schematic cross-sectional view of the first embodiment of the present application;

[0035] Figure 4 This is a front structural schematic diagram of an annealing furnace according to the first embodiment of the present application;

[0036] Figure 5 This is a schematic side structural diagram of an annealing furnace according to the first embodiment of the present application;

[0037] Figure 6 This is a schematic diagram of the three-dimensional structure of the annealing rack according to the first embodiment of the present application;

[0038] Figure 7 This is a schematic diagram of the planar structure of the damping plate in the closed state according to the first embodiment of the present application;

[0039] Figure 8 This is a schematic diagram of the planar structure of the damping plate in the open state according to the first embodiment of the present application.

[0040] Description of the numbers in the figure:

[0041] 1. Annealing furnace body; 11. Feed inlet; 12. Discharge outlet; 13. Limit slide; 14. Sealing cover; 2. Annealing rack; 201. Fixed plate; 202. Partition column; 203. Limit slide; 204. Damping plate; 205. Deformation piece; 3. Unloading frame; 31. Partition plate; 4. Protective shell cover; 5. Linkage assembly; 501. Drive motor; 502. Drive pulley; 503. Drive belt; 6. First drive screw; 7. Second drive screw; 8. Smoke exhaust pipe; 9. Water tank. DETAILED DESCRIPTION

[0042] An implementation method of the present application is described in detail below with reference to the accompanying drawings.

[0043] The first implementation method:

[0044] The present invention provides an annealing furnace for nickel wire mesh production. Figure 1-4 , including an annealing furnace body 1 with a built-in heating structure. The heating structure can adopt a conventional annealing furnace heating element in the prior art. In addition, a conventional fan structure is provided in the annealing furnace body 1, so that the temperature of each area inside the annealing furnace body 1 is relatively uniform, thereby ensuring a uniform annealing effect on the nickel wire mesh.

[0045] An annealing rack 2 is arranged on the inner side of the annealing furnace body 1, and the annealing rack 2 is horizontally slidably installed on the inner side of the annealing furnace body 1. A feeding frame 3 is arranged on the upper side of the annealing furnace body 1, and the feeding frame 3 is horizontally slidably installed on the top of the annealing furnace body 1; a plurality of partition plates 31 are equidistantly installed on the inner side of the feeding frame 3 along its horizontal moving direction, and a nickel wire mesh is placed between two adjacent partition plates 31; a synchronous driving mechanism for driving the annealing rack 2 and the feeding frame 3 to move synchronously horizontally is installed on one side of the annealing furnace body 1.

[0046] See also Figure 3 A feed port 11 is provided at the top of one side of the annealing furnace body 1, and the diameter of the feed port 11 is the same as the gap between two adjacent partition plates 31. A discharge port 12 is provided at the bottom of the other side of the annealing furnace body 1, and the diameter of the discharge port 12 is the same as that of the feed port 11. The temperature inside the annealing furnace body 1 increases successively along the direction from the feed port 11 to the discharge port 12.

[0047] In the annealing furnace produced by the above-mentioned nickel wire mesh, a synchronous driving mechanism can be used to drive the annealing rack 2 and the unloading frame 3 to move horizontally synchronously, and the nickel wire mesh in the unloading frame 3 falls from the feed port 11 to the annealing rack 2 in sequence, realizing automatic and continuous loading, and the sizes of the feed port 11 and the discharge port 12 are set to be able to meet the needs of a nickel wire mesh falling vertically, which can greatly reduce the overflow of heat inside the annealing furnace body 1, thereby saving annealing energy consumption.

[0048] For details about annealing rack 2, please refer to Figure 6The annealing rack 2 includes two fixed plates 201 and a plurality of partition columns 202. The plurality of partition columns 202 are arranged in a rectangular array and fixed between the two fixed plates 201. The fixed plates 201 are connected to the synchronous driving mechanism.

[0049] The nickel wire mesh dropped from between two adjacent partition plates 31 just drops between two vertical rows of partition columns 202. The partition columns 202 are used to separate the nickel wire meshes to avoid overlapping of multiple nickel wire meshes, thereby improving the uniformity and comprehensiveness of annealing.

[0050] A limiting slide block 203 is installed at the side end of the fixed plate 201 , and a limiting slide groove 13 for the limiting slide block 203 to slide is horizontally arranged on the inner side wall of the annealing furnace body 1 .

[0051] Regarding the synchronous drive mechanism, specifically, as a further supplement to the present application, the synchronous drive mechanism includes a linkage assembly 5, a first drive screw 6 and a second drive screw 7. The linkage assembly 5 is installed on the outer wall of the annealing furnace body 1. A protective shell cover 4 is installed on the outer wall of the annealing furnace body 1 and is covered on the outside of the linkage assembly 5. The first drive screw 6 is horizontally rotatably installed on the top of the annealing furnace body 1 and is threaded through the blanking frame 3. The second drive screw 7 is horizontally rotatably installed on the inner side of the annealing furnace body 1 and is threaded through the limit slider 203. The first drive screw 6 and the second drive screw 7 are both connected to the linkage assembly 5.

[0052] Among them, see Figure 4 The linkage assembly 5 includes a driving motor 501, a transmission pulley 502 and a transmission belt 503. The driving motor 501 is fixed to the inner side of the protective shell 4. There are multiple transmission pulleys 502, which are rotatably installed on the annealing furnace body 1 and are coaxially fixed with the first driving screw 6 and the second driving screw 7 respectively. One of the transmission pulleys 502 is coaxially fixed with the output shaft of the driving motor 501, and the transmission belt 503 is simultaneously sleeved on the outer sides of multiple transmission pulleys 502.

[0053] By cooperating with the drive motor 501, the drive pulley 502 and the drive belt 503, a drive motor 501 can be used to drive the first drive screw 6 and the second drive screw 7 to rotate synchronously, thereby driving the annealing rack 2 and the blanking frame 3 to move horizontally synchronously, realizing automatic continuous loading and unloading.

[0054] In addition, it needs to be further explained that, in addition to using the transmission cooperation effect of the transmission pulley 502 and the transmission belt 503 mentioned above, a sprocket and a chain can also be used to use the above-mentioned linkage effect.

[0055] In order to facilitate the nickel wire mesh to fall smoothly to the inner side of the annealing rack 2, the outer side of the partition column 202 is rotatably sleeved with a shaft sleeve. During the falling process of the nickel wire mesh, there is rolling friction between the shaft sleeve and the nickel wire mesh, which greatly reduces the friction between the two, thereby facilitating the nickel wire mesh to fall smoothly to the inner side of the annealing rack 2.

[0056] In order to prevent the nickel wire mesh falling from the unloading frame 3 from hitting the bottom of the annealing furnace body 1 and rebounding, please refer to Figure 7 and Figure 8 The end surfaces of the two fixed plates 201 that are close to each other are rotatably installed with damping plates 204, and the upper end of the damping plate 204 is rotatably connected to the fixed plate 201, and a deformable member 205 is fixed between the lower end of the damping plate 204 and the fixed plate 201. Specifically, the deformable member 205 is a memory alloy, specifically a memory alloy with a two-way memory effect in the prior art, and has the property of elongating at low temperatures and contracting at high temperatures. The specific change temperature of the deformable member 205 can be set according to the actual annealing temperature and combined with the existing conventional technology.

[0057] In the loading area where the temperature is relatively low, the deformation piece 205 is extended to make the damping plate 204 in an open state. At this time, the nickel wire mesh dropped from the unloading frame 3 can be stably clamped by the damping plate 204 and is not easy to rebound due to collision with the bottom of the annealing furnace body 1; when the annealing rack 2 moves horizontally with the nickel wire mesh to the high temperature area of ​​the annealing furnace body 1, the deformation piece 205 is contracted to make the damping plate 204 in a closed state, and the nickel wire mesh loses the clamping effect of the damping plate 204 and can fall smoothly from the discharge port 12 to realize automatic discharge.

[0058] Among them, see Figure 4 A sealing cover plate 14 is provided on the lower side of the feed port 11 and the discharge port 12. One end of the sealing cover plate 14 is fixed to the annealing furnace body 1 through a torsion spring. The sealing cover plate 14 can be opened under the pressure of the nickel wire mesh, and after the pressure of the nickel wire mesh is lost, it is closed under the resetting action of the torsion spring, thereby maintaining the sealing of the feed port 11 and the discharge port 12, and further reducing the overflow of heat inside the annealing furnace body 1.

[0059] Among them, see Figure 1-2 A smoke exhaust pipe 8 is installed at the side end of the annealing furnace body 1, and a water tank 9 is fixed to the side end of the annealing furnace body 1. The smoke exhaust pipe 8 passes through the water tank 9, and the part of the smoke exhaust pipe 8 located inside the water tank 9 is coiled. By passing the smoke exhaust pipe 8 through the water tank 9, the heat along the inside of the smoke exhaust pipe 8 can be recycled and utilized, and the water in the water tank 9 can be heated, which is more energy-saving.

[0060] Compared with the annealing furnace in the prior art, the present solution, through the coordinated arrangement of the annealing rack 2, the unloading frame 3 and the synchronous driving mechanism, can utilize the synchronous driving mechanism to drive the annealing rack 2 and the unloading frame 3 to move horizontally synchronously, and the nickel wire mesh in the unloading frame 3 falls from the feed port 11 into the annealing rack 2 in sequence, so as to realize automatic continuous loading, and the sizes of the feed port 11 and the discharge port 12 are set to be able to meet the vertical drop of a nickel wire mesh, which can greatly reduce the overflow of heat inside the annealing furnace body 1, thereby saving annealing energy consumption; further, by arranging sealing cover plates 14 on the lower sides of the feed port 11 and the discharge port 12, and one end of the sealing cover plate 14 is fixed to the annealing furnace body 1 by a torsion spring, the sealing cover plate 14 can be opened under the pressure of the nickel wire mesh, and when the nickel wire mesh is lost After the pressure is applied, it is closed under the resetting action of the torsion spring, maintaining the sealing of the feed port 11 and the discharge port 12, further reducing the overflow of heat inside the annealing furnace body 1; in addition, with the arrangement of the damping plate 204 and the deforming member 205, the deforming member 205 can be extended in the loading area with relatively low temperature, so that the damping plate 204 is in an open state. At this time, the nickel wire mesh falling from the unloading frame 3 can be stably clamped by the damping plate 204, and is not easy to rebound due to collision with the bottom of the annealing furnace body 1; when the annealing rack 2 moves horizontally to the high temperature area of ​​the annealing furnace body 1 with the nickel wire mesh, the deforming member 205 is contracted to make the damping plate 204 in a closed state, and the nickel wire mesh loses the clamping effect of the damping plate 204 and can fall smoothly from the discharge port 12, thereby realizing automatic discharge.

[0061] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An annealing furnace for producing nickel wire mesh, comprising an annealing furnace body (1) with a built-in heating structure, characterized in that: An annealing rack (2) is arranged on the inner side of the annealing furnace body (1), and the annealing rack (2) is horizontally slidably mounted on the inner side of the annealing furnace body (1); A material unloading frame (3) is arranged on the upper side of the annealing furnace body (1), and the material unloading frame (3) is horizontally slidably mounted on the top of the annealing furnace body (1); A plurality of partition plates (31) are installed at equal intervals on the inner side of the blanking frame (3) along its horizontal moving direction; A synchronous driving mechanism for driving the annealing rack (2) and the material unloading frame (3) to move synchronously horizontally is installed on one side of the annealing furnace body (1); A feed port (11) is provided at the top end of one side of the annealing furnace body (1), and the diameter of the feed port (11) is the same as the gap between two adjacent partition plates (31); a discharge port (12) is provided at the bottom end of the other side of the annealing furnace body (1), and the diameter of the discharge port (12) is the same as the diameter of the feed port (11); The temperature inside the annealing furnace body (1) increases in sequence along the direction from the feed inlet (11) to the discharge outlet (12); The annealing rack (2) comprises two fixed plates (201) and a plurality of partition columns (202); The plurality of partition columns (202) are arranged in a rectangular array and fixed between the two fixing plates (201); The fixing plate (201) is connected to the synchronous driving mechanism.

2. An annealing furnace for producing nickel wire mesh according to claim 1, characterized in that: A limiting slide block (203) is installed at the side end of the fixed plate (201), and a limiting slide groove (13) for the limiting slide block (203) to slide is horizontally arranged on the inner side wall of the annealing furnace body (1).

3. An annealing furnace for producing nickel wire mesh according to claim 2, characterized in that: The synchronous drive mechanism comprises a linkage assembly (5), a first drive screw (6) and a second drive screw (7); The linkage assembly (5) is mounted on the outer wall of the annealing furnace body (1), and a protective shell cover (4) is mounted on the outer wall of the annealing furnace body (1) and is arranged to cover the outer side of the linkage assembly (5); The first driving screw (6) is horizontally rotatably mounted on the top of the annealing furnace body (1) and is threadedly penetrated through the blanking frame (3); The second driving screw (7) is horizontally rotatably mounted on the inner side of the annealing furnace body (1) and is threadedly penetrated through the limiting slider (203); The first driving screw rod (6) and the second driving screw rod (7) are both connected to the linkage assembly (5).

4. An annealing furnace for producing nickel wire mesh according to claim 3, characterized in that: The linkage assembly (5) comprises a driving motor (501), a driving pulley (502) and a driving belt (503); The driving motor (501) is fixed to the inner side of the protective shell cover (4); a plurality of driving pulleys (502) are provided and are rotatably mounted on the annealing furnace body (1) and are coaxially fixed to the first driving screw rod (6) and the second driving screw rod (7), respectively; one of the driving pulleys (502) is coaxially fixed to the output shaft of the driving motor (501); The transmission belt (503) is simultaneously sleeved on the outer sides of a plurality of the transmission pulleys (502).

5. The annealing furnace for producing nickel wire mesh according to claim 1, characterized in that: The outer side of the partition column (202) is rotatably sleeved with a shaft sleeve.

6. The annealing furnace for producing nickel wire mesh according to claim 1, characterized in that: The end surfaces of the two fixed plates (201) that are close to each other are both rotatably mounted with damping plates (204), and the upper ends of the damping plates (204) are rotatably connected to the fixed plates (201), and a deformable member (205) is fixed between the lower ends of the damping plates (204) and the fixed plates (201).

7. An annealing furnace for producing nickel wire mesh according to claim 6, characterized in that: The deformable member (205) is a memory alloy and has the property of stretching at low temperatures and contracting at high temperatures.

8. The annealing furnace for producing nickel wire mesh according to claim 1, characterized in that: A sealing cover plate (14) is provided at the lower side of the feed port (11) and the discharge port (12), and one end of the sealing cover plate (14) is fixed to the annealing furnace body (1) via a torsion spring.

9. An annealing furnace for producing nickel wire mesh according to claim 1, characterized in that: A smoke exhaust pipe (8) is installed at the side end of the annealing furnace body (1), a water storage tank (9) is fixed to the side end of the annealing furnace body (1), the smoke exhaust pipe (8) penetrates the water storage tank (9), and the part of the smoke exhaust pipe (8) located inside the water storage tank (9) is arranged in a coiled manner.

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