Bus duct insulating layer coating equipment

Abstract

The invention discloses bus duct insulating layer coating equipment which comprises a shell and a liquid outlet, the liquid outlet is welded to one side of the shell and communicates with the shell, an airlock removing assembly is arranged on the surface of the shell, and a cleaning and stirring assembly is arranged at the bottom in the shell. In the operation process of the airlock removing assembly, the cleaning and stirring assembly can be driven to operate, in the operation process of the cleaning and stirring assembly, the coating liquid can be stirred and mixed, attachment scraping can be conducted on the position, close to the bottom, of the inner wall of the shell, and in the scraping process, the coating liquid can be scraped by the cleaning and stirring assembly. And attachments on the surface of the scraping structure can be removed through vibration, and the situation that part of raw materials in the coating liquid are precipitated and attached in the using process, and consequently the coating quality is affected is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of bus duct coating, and in particular relates to a bus duct insulation layer coating device. Background Art

[0002] Bus duct is a highly efficient power transmission and distribution equipment, consisting of a metal casing, conductive copper or aluminum busbars, and insulating materials. The busbars are fixed by insulating supports. It features high current carrying capacity, low voltage drop, convenient tapping, and a high level of protection. Compared with traditional cables, it is easy to install, takes up less space, and facilitates future expansion and maintenance. It is widely used in high-rise buildings, factory workshops, large shopping malls, and other places, and is an important part of modern power transmission systems. Traditional immersion coating equipment is mostly used in a vertical immersion method. This method is prone to air lock due to one-way fluid penetration and structural closure. In order to make the coating liquid more uniform, stirring is generally required during the coating process. During the coating process, attachments in normal ingredients (such as titanium dioxide and mica powder) will stick to the bottom of the device. Therefore, in order to avoid affecting the use effect of the coating liquid, these attachments need to be scraped off. Summary of the Invention

[0003] The purpose of the present invention is to provide a bus duct insulation layer coating device, which has the advantages of removing air locks by vibrating and tilting the bus duct, stirring and mixing the coating liquid, scraping off attachments on the inner wall of the device and removing attachments on the surface of the scraping structure.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: a bus duct insulation layer coating device, including a shell and a liquid outlet, the liquid outlet is welded to one side of the shell, and the liquid outlet is connected to the shell, an air lock removal component is provided on the surface of the shell, and a cleaning and stirring component is provided at the bottom of the shell.

[0005] By adopting the above technical solution, the air lock removal component removes the air lock by vibrating and tilting the bus duct. The cleaning and stirring component is used to remove attachments on the inner wall of the device and stir and mix the coating liquid, and can automatically vibrate and remove attachments on the stirring structure.

[0006] The present invention is further configured as follows: the air lock removal assembly includes a motor, the motor is bolted to one side of the shell, the output end of the motor is fixedly connected to a reciprocating screw through a coupling, the surface of the reciprocating screw is rotatably connected to a support plate, and the support plate is welded to one side of the shell.

[0007] With the above technical solution, the operation of the motor will drive the reciprocating screw to rotate, and the support plate is used to support the reciprocating screw.

[0008] The present invention is further configured as follows: a lifting plate is threadedly connected to the surface of the reciprocating screw rod, a fixing rod is welded inside one end of the lifting plate, and a placement shell is welded to one end of the fixing rod.

[0009] With the above technical solution, the rotation of the reciprocating screw will drive the lifting plate, the fixing rod and the placement shell to move downward.

[0010] The present invention is further configured as follows: two groups of first spring push rods are fixedly connected through the top and bottom of the placement shell, and the piston ends of the corresponding four groups of first spring push rods are commonly bolted to a roller group, and a sliding rod is slidably connected to one side of the placement shell, and a third rotating shaft is arranged inside one end of the sliding rod.

[0011] With the above technical solution, the bus duct will be placed inside the placement shell, and the roller group will facilitate the movement of the bus duct. The first spring push rod will push the roller group to clamp on the surface of the bus duct for a certain clamping.

[0012] The present invention is further configured as follows: a first telescopic spring is sleeved on the surface of the sliding rod, a connecting plate is welded on the surface of the sliding rod, and two ends of the first telescopic spring are respectively connected between the placement shell and the connecting plate through spring fixing parts, and a clamping plate is respectively provided at both ends of the sliding rod, and the clamping plate on the right side is slidingly connected to the sliding rod, the clamping plate on the left side is fixedly welded to the sliding rod, and an oblique block is welded on one side of the clamping plate on the right side, two groups of fixing plates are provided at one end of the sliding rod, one group of the fixing plates is fixedly connected to the clamping plate, and the other group of the fixing plates is fixedly sleeved with the third rotating shaft, and a threaded rod is threadedly connected to the surface of the fixing plate on the right side, and the other end of the threaded rod is rotatably connected to the fixing plate on the left side.

[0013] By adopting the above technical solution, when installing the bus duct, the clamping plate located at one end of the inclined block is rotated to facilitate placing the bus duct inside the placement shell. The first telescopic spring can push the clamping plate to clamp on the surface of the bus duct. By rotating the threaded rod, the threaded rod will drive the clamping plate to move on the surface of the threaded rod. This is suitable for clamping bus ducts of various lengths.

[0014] The present invention is further configured as follows: an extrusion rod is slidably connected inside the clamping plate located on the left side, a slip ring is welded on the surface of the extrusion rod, three groups of extrusion blocks are welded on one side of the inner wall of the shell, and the extrusion blocks are used in conjunction with the oblique blocks.

[0015] By adopting the above technical solution, the clamping plate can slide on the surface of the extrusion rod, and the extrusion rod drives the slip ring to move down on the surface of the rotating column. When the inclined block squeezes the extrusion block, since the two sides of the inclined block are inclined and made of tempered glass, the inclined block will move to one side, thereby driving the bus duct to move using the sliding rod. When the inclined block is out of contact with the extrusion block, the first telescopic spring will drive the bus duct to reset, and the vibration generated will help to remove the air lock on the surface of the bus duct.

[0016] The present invention is further configured as follows: a rotating column is slidingly connected inside the lifting plate, the rotating column is arranged inside the slip ring and is slidingly connected, a reciprocating thread groove is opened on the surface of the rotating column, and the reciprocating thread groove is slidingly connected to the extrusion rod, one end of the rotating column is fixedly connected to a first rotating shaft, and the first rotating shaft is rotationally connected to the bottom of the shell, the surface of the rotating column is rotationally connected to a limit plate, and the limit plate is welded to one side of the inner wall of the shell, and the surfaces of the reciprocating screw rod and the rotating column are fixedly sleeved with mutually meshing gears.

[0017] By adopting the above technical solution, when the extrusion rod moves downward and squeezes the reciprocating thread groove, the rotating column will rotate using the first rotating shaft according to the trajectory of the reciprocating thread groove. The slip ring can prevent the extrusion rod from falling off from the reciprocating thread groove, and the limit plate is used to prevent the rotating column from tilting.

[0018] The present invention is further configured as follows: the cleaning and stirring assembly includes a first rotating wheel, the first rotating wheel is fixedly connected to the surface of the rotating column, a second rotating shaft is rotatably connected to the center of the inner bottom of the shell, and a vertical rod is fixedly sleeved on the inner side of the second rotating shaft.

[0019] By adopting the above technical solution, the vertical pole can be rotated by utilizing the second rotating shaft.

[0020] The present invention is further configured as follows: a second rotating wheel is fixedly connected to the surface of the vertical pole, and a belt is commonly connected to the second rotating wheel and the first rotating wheel; several groups of stirring rods are welded to the upper end of the vertical pole; and three groups of connecting rods are welded to the lower end of the vertical pole.

[0021] With the above technical solution, the rotation of the rotating column drives the first rotating wheel to rotate, and the first rotating wheel drives the second rotating wheel to rotate by means of a belt, thereby driving the stirring rod to rotate. The stirring rod is used to stir and mix the coating liquid.

[0022] The present invention is further configured as follows: a rotating rod is welded inside one end of the connecting rod, a scraper is slidably connected to the surface of the rotating rod, a second telescopic spring is sleeved on the surface of the rotating rod, and both ends of the second telescopic spring are connected between the connecting rod and the scraper through spring fixing parts, and six groups of protruding rods are welded to the lower end of the inner wall of the shell.

[0023] By adopting the above technical solution, the rotation of the vertical rod will synchronously drive the rotation of the connecting rod, and then drive the scraper to scrape off the attachments on the inner wall of the shell. During the scraping process, a lot of attachments will stick to the scraper surface. If it is not cleaned in time, it will affect the subsequent scraping work. Therefore, when the scraper contacts and squeezes the convex rod, since the two sides of one end of the scraper are inclined and relatively smooth, the scraper will move down on the surface of the rotating rod. When the scraper passes over the convex rod, the second telescopic spring will suddenly drive the scraper to reset, and the vibration generated will cause the attachments on the scraper surface to fall off automatically.

[0024] In summary, the present invention has the following beneficial effects: The bus duct is installed inside the air lock removal component. After the installation is completed, the bus duct is in a tilted state. Then the air lock removal component is used to drive the bus duct to move to the coating liquid inside the shell. The bus duct will be displaced during the downward movement. The resulting displacement and tilted state will automatically remove the air lock on the surface. During the operation of the air lock removal component, it will drive the cleaning and stirring component to operate. During the operation, the cleaning and stirring component will stir and mix the coating liquid, and can scrape off the attachments on the inner wall of the shell near the bottom. During the scraping process, the attachments on the surface of the scraping structure will also be vibrated and removed to avoid the situation where some raw materials in the coating liquid are precipitated and attached during use, thereby affecting the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic three-dimensional diagram of the overall structure of the present invention; Figure 2 This is a schematic three-dimensional diagram of the placement shell structure of the present invention; Figure 3 This is a schematic three-dimensional diagram of the oblique block structure of the present invention; Figure 4 is a schematic three-dimensional diagram of the convex rod structure of the present invention; Figure 5 It is a schematic three-dimensional diagram of the belt structure of the present invention; Figure 6 It is a schematic three-dimensional diagram of the scraper structure of the present invention.

[0026] Reference numerals: 1. Housing; 2. Liquid outlet; 3. Air lock removal assembly; 301. Motor; 302. Reciprocating screw; 303. Support plate; 304. Lifting plate; 305. Fixed rod; 306. Placement housing; 307. First spring push rod; 308. Roller assembly; 309. First telescopic spring; 310. Sliding rod; 311. Clamping plate; 312. Extrusion rod; 313. Slip ring; 314. Inclined block; 315. Extrusion block; 316. Rotating column; 317. Reciprocating screw Grooves; 318, first rotating shaft; 319, limiting plate; 320, threaded rod; 321, connecting plate; 322, fixed plate; 323, third rotating shaft; 324, gear; 4, cleaning and stirring assembly; 401, first rotating wheel; 402, belt; 403, second rotating shaft; 404, second rotating wheel; 405, vertical pole; 406, stirring rod; 407, connecting rod; 408, protruding rod; 409, scraper; 410, second telescopic spring; 411, rotating rod. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1: refer to Figure 1-6 A bus duct insulation layer coating device includes a shell 1 and a liquid outlet 2. The liquid outlet 2 is welded to one side of the shell 1 and is connected to the shell 1. An air lock removal component 3 is provided on the surface of the shell 1, and a cleaning and stirring component 4 is provided at the bottom of the shell 1.

[0029] Brief description of the usage process: When in use, the bus duct is installed inside the air lock removal component 3. After the installation is completed, the bus duct is in a tilted state. Then the air lock removal component 3 is used to drive the bus duct to move to the coating liquid inside the shell 1. The bus duct will be displaced during the downward movement. The resulting displacement and tilted state will automatically remove the air lock on the surface, and the air lock removal component 3 will drive the cleaning and stirring component 4 to operate during operation. The cleaning and stirring component 4 will stir and mix the coating liquid during operation, and can clean the attachments on the inner wall of the shell 1 near the bottom. During the cleaning process, the attachments on the surface of the scraping structure will also be vibrated and removed to prevent affecting the efficiency of the bus duct coating. The liquid outlet 2 is used for waste liquid discharge, which achieves the effect of facilitating the coating of the bus duct.

[0030] Example 2: Based on Example 1, Figure 1-3 、 Figure 5The air lock removal component 3 includes a motor 301, which is bolted to one side of the shell 1. The output end of the motor 301 is fixedly connected to a reciprocating screw rod 302 through a coupling. The surface of the reciprocating screw rod 302 is rotatably connected to a support plate 303, and the support plate 303 is welded to one side of the shell 1; the surface of the reciprocating screw rod 302 is threadedly connected to a lifting plate 304, and a fixed rod 305 is welded inside one end of the lifting plate 304, and a placement shell 306 is welded to one end of the fixed rod 305; the top and bottom of the placement shell 306 are fixedly connected with two groups of first spring push rods 307, and the piston ends of the corresponding four groups of first spring push rods 307 are all connected. The roller group 308 is connected with the bolt, and a slide rod 310 is slidably connected to one side of the placement shell 306, and a third rotating shaft 323 is provided inside one end of the slide rod 310; a first telescopic spring 309 is sleeved on the surface of the slide rod 310, and a connecting plate 321 is welded on the surface of the slide rod 310, and the two ends of the first telescopic spring 309 are respectively connected between the placement shell 306 and the connecting plate 321 through spring fixing members, and a clamping plate 311 is provided at both ends of the slide rod 310, and the clamping plate 311 on the right side is slidably connected to the slide rod 310, the clamping plate 311 on the left side is fixedly welded to the slide rod 310, and the clamping plate 311 on the right side is fixedly welded to the slide rod 310, and the clamping plate 311 on the right side is fixedly welded to the slide rod 310. The cam 314 is welded on one side of the cam 311, and two sets of fixing plates 322 are provided at one end of the sliding rod 310. One set of fixing plates 322 is fixedly connected to the clamping plate 311, and the other set of fixing plates 322 is fixedly sleeved with the third rotating shaft 323. The surface of the fixing plate 322 on the right side is threadedly connected with a threaded rod 320, and the other end of the threaded rod 320 is rotatably connected to the fixing plate 322 on the left side; the inside of the clamping plate 311 on the left side is slidably connected with an extrusion rod 312, and a slip ring 313 is welded on the surface of the extrusion rod 312. Three sets of extrusion blocks 315 are welded on one side of the inner wall of the shell 1, and the extrusion blocks 315 are matched with the oblique blocks 314. The lifting plate 304 is slidably connected to a rotating column 316, which is arranged inside the slip ring 313 and is slidably connected. A reciprocating thread groove 317 is provided on the surface of the rotating column 316, and the reciprocating thread groove 317 is slidably connected to the extrusion rod 312. One end of the rotating column 316 is fixedly connected to a first rotating shaft 318, and the first rotating shaft 318 is rotatably connected to the bottom of the shell 1. The surface of the rotating column 316 is rotatably connected to a limit plate 319, and the limit plate 319 is welded to one side of the inner wall of the shell 1. The surfaces of the reciprocating screw rod 302 and the rotating column 316 are fixedly sleeved with gears 324 that mesh with each other.

[0031] The process of use is briefly described as follows: first, rotate the clamping plate 311 at one end of the inclined block 314, so that the clamping plate 311 rotates on the surface of the slide rod 310 using the third rotating shaft 323, so as not to block the bus duct, and facilitate the placement of the bus duct inside the placement shell 306. When the placement is completed, use the third rotating shaft 323 to reset the clamping plate 311, and then rotate the threaded rod 320. The threaded rod 320 will drive the clamping plate 311 to move on the surface of the threaded rod 320, thereby cooperating with the clamping plate 311 at the other end to press the bus duct. The bus duct will be placed inside the placement shell 306, and the roller group 308 will facilitate the movement of the bus duct. The first spring push rod 307 will push the roller group 308 to clamp on the surface of the bus duct for a certain clamping. Then the motor 301 will be started. The operation of the motor 301 will drive the reciprocating screw rod 302 to rotate. The reciprocating screw rod 302 will drive the lifting plate 304 to move up and down on the surface of the rotating column 316. When the reciprocating screw rod 302 rotates, it drives the rotating column 316 to rotate through the gear 324. When the rotating column 316 rotates, it will pass through the reciprocating thread groove 3 The cooperation of 17 drives the extrusion rod 312 to move up and down (the groove pitch of the reciprocating thread groove 317 is the same as the thread pitch of the reciprocating screw rod 302, and the direction of the reciprocating thread groove 317 is opposite to the thread direction of the reciprocating screw rod 302), so that the extrusion rod 312 drives the slide rod 310 to move up and down, thereby causing the slide rod 310 to drive the placement shell 306 to move up and down in the coating liquid. At the same time, when the inclined block 314 follows the placement shell 306 to move up and down, the inclined block 314 will squeeze the extrusion block 315. Since the two sides of the inclined block 314 are inclined and The material of tempered glass is such that the inclined block 314 will move to one side, thereby driving the bus duct to move on the surface of the roller group 308. The roller group 308 can make the bus duct move more smoothly, thereby coating the bus duct part in contact with the roller group 308. When the inclined block 314 is out of contact with the extrusion block 315, the first telescopic spring 309 will drive the bus duct to reset. The resulting displacement helps to remove the air lock on the surface of the bus duct, thereby achieving the goal of displacing and tilting the bus duct (the placement shell 306 is a tilted design, refer to Figure 2 ), which facilitates the removal of air lock from the bus duct.

[0032] Example 3: Based on Example 2, Figure 2 、 Figure 4-6The cleaning and stirring component 4 includes a first rotating wheel 401, which is fixedly connected to the surface of the rotating column 316. The second rotating shaft 403 is rotatably connected to the center of the inner bottom of the shell 1, and the vertical rod 405 is fixedly sleeved on the inside of the second rotating shaft 403; the second rotating wheel 404 is fixedly connected to the surface of the vertical rod 405, and the second rotating wheel 404 and the first rotating wheel 401 are commonly connected by a belt 402. Several groups of stirring rods 406 are welded to the upper end of the vertical rod 405, and three groups of connecting rods 407 are welded to the lower end of the vertical rod 405; a rotating rod 411 is welded inside one end of the connecting rod 407, and a scraper 409 is slidably connected to the surface of the rotating rod 411. A second telescopic spring 410 is sleeved on the surface of the rotating rod 411, and both ends of the second telescopic spring 410 are connected between the connecting rod 407 and the scraper 409 through a spring fixing member. Six groups of convex rods 408 are welded to the lower end of the inner wall of the shell 1.

[0033] Brief description of the use process: When the rotating column 316 rotates, the first rotating wheel 401 will use the belt 402 to drive the vertical rod 405 inside the second rotating wheel 404 to rotate on the surface of the second rotating shaft 403, thereby driving the stirring rod 406 to rotate and stir and mix the coating liquid inside the shell 1 to make the coating liquid more uniform. When the vertical rod 405 rotates, it will also synchronously drive the connecting rod 407 to rotate, thereby driving the scraper 409 to scrape off the attachments on the inner wall of the shell 1. During the scraping process, the scraper 409 will have a lot of attachments on its surface. If it is not cleaned in time, it will affect the subsequent scraping work. Therefore, when When the scraper 409 contacts and squeezes the protruding rod 408, since the two sides of one end of the scraper 409 are inclined and relatively smooth, the scraper 409 will move down on the surface of the rotating rod 411. When the scraper 409 passes over the protruding rod 408, the second telescopic spring 410 will suddenly drive the scraper 409 to reset. The vibration generated will cause the attachments on the surface of the scraper 409 to fall off automatically, thereby achieving the effect of facilitating the scraping of attachments on the inner wall of the shell 1, stirring and mixing the coating liquid, and automatically removing attachments on the surface of the scraper 409, thereby avoiding the situation where some raw materials in the coating liquid precipitate and adhere during use and affect the coating quality.

[0034] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A bus duct insulation coating device, comprising a housing (1) and a liquid outlet (2), characterized in that: The liquid outlet (2) is welded to one side of the shell (1), and the liquid outlet (2) and the shell (1) are connected. An air lock removal component (3) is provided on the surface of the shell (1), and a cleaning and stirring component (4) is provided on the bottom of the shell (1).

2. The bus duct insulation coating equipment according to claim 1, characterized in that: The air lock removal assembly (3) comprises a motor (301), the motor (301) being bolted to one side of the housing (1), the output end of the motor (301) being fixedly connected to a reciprocating screw (302) via a coupling, the surface of the reciprocating screw (302) being rotatably connected to a support plate (303), and the support plate (303) being welded to one side of the housing (1).

3. The bus duct insulation coating equipment according to claim 2, characterized in that: The surface of the reciprocating screw rod (302) is threadedly connected to a lifting plate (304), one end of the lifting plate (304) is internally welded with a fixing rod (305), and one end of the fixing rod (305) is welded with a placement shell (306).

4. The bus duct insulation coating equipment according to claim 3, characterized in that: Two groups of first spring push rods (307) are fixedly connected through the top and bottom of the placement shell (306), and the piston ends of the corresponding four groups of first spring push rods (307) are commonly bolted to a roller group (308). A sliding rod (310) is slidably connected to one side of the placement shell (306), and a third rotating shaft (323) is provided inside one end of the sliding rod (310).

5. The bus duct insulation coating equipment according to claim 4, characterized in that: The surface of the slide bar (310) is sleeved with a first telescopic spring (309), the surface of the slide bar (310) is welded with a connecting plate (321), and the two ends of the first telescopic spring (309) are respectively connected between the placement shell (306) and the connecting plate (321) through spring fixing members, and the two ends of the slide bar (310) are respectively provided with a clamping plate (311), and the clamping plate (311) on the right side is slidably connected to the slide bar (310), and the clamping plate (311) on the left side is fixed to the slide bar (310). The clamping plate (311) on the right side is welded with an inclined block (314) on one side, and two groups of fixed plates (322) are provided at one end of the slide rod (310), one group of the fixed plates (322) is fixedly connected to the clamping plate (311), and the other group of the fixed plates (322) is fixedly sleeved with the third rotating shaft (323). The surface of the fixed plate (322) on the right side is threadedly connected with a threaded rod (320), and the other end of the threaded rod (320) is rotatably connected to the fixed plate (322) on the left side.

6. The bus duct insulation coating equipment according to claim 5, characterized in that: An extrusion rod (312) is slidably connected to the interior of the clamping plate (311) on the left side, a slip ring (313) is welded to the surface of the extrusion rod (312), and three groups of extrusion blocks (315) are welded to one side of the inner wall of the shell (1), and the extrusion blocks (315) are used in conjunction with the inclined blocks (314).

7. The bus duct insulation coating equipment according to claim 6, characterized in that: The lifting plate (304) is internally slidably connected to a rotating column (316), and the rotating column (316) is arranged inside the slip ring (313) and is slidably connected. A reciprocating thread groove (317) is provided on the surface of the rotating column (316), and the reciprocating thread groove (317) is slidably connected to the extrusion rod (312). One end of the rotating column (316) is fixedly connected to a first rotating shaft (318), and the first rotating shaft (318) is rotatably connected to the bottom of the shell (1). The surface of the rotating column (316) is rotatably connected to a limiting plate (319), and the limiting plate (319) is welded to one side of the inner wall of the shell (1). The surfaces of the reciprocating screw rod (302) and the rotating column (316) are fixedly sleeved with mutually meshing gears (324).

8. The bus duct insulation coating equipment according to claim 7, characterized in that: The cleaning and stirring assembly (4) comprises a first rotating wheel (401), the first rotating wheel (401) being fixedly connected to the surface of the rotating column (316), a second rotating shaft (403) being rotatably connected at the center of the inner bottom of the housing (1), and a vertical rod (405) being fixedly sleeved on the inner side of the second rotating shaft (403).

9. The bus duct insulation coating equipment according to claim 8, characterized in that: A second rotating wheel (404) is fixedly connected to the surface of the vertical rod (405), and a belt (402) is commonly connected to the second rotating wheel (404) and the first rotating wheel (401). Several groups of stirring rods (406) are welded to the upper end of the vertical rod (405), and three groups of connecting rods (407) are welded to the lower end of the vertical rod (405).

10. The bus duct insulation coating equipment according to claim 9, characterized in that: A rotating rod (411) is welded inside one end of the connecting rod (407), a scraper (409) is slidably connected to the surface of the rotating rod (411), a second telescopic spring (410) is sleeved on the surface of the rotating rod (411), and both ends of the second telescopic spring (410) are connected between the connecting rod (407) and the scraper (409) through spring fixing members, and six groups of protruding rods (408) are welded to the lower end of the inner wall of the shell (1).

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