Graphite roasting device

Abstract

The invention discloses a graphite roasting device. Comprising a mounting mechanism, a roasting mechanism is mounted on the mounting mechanism, one end of the roasting mechanism is connected with a power mechanism, and a cover sealing mechanism is mounted at one end of the roasting mechanism; the mounting mechanism is used for supporting and mounting the roasting mechanism, the power mechanism is arranged at one end of the roasting mechanism and used for providing power output and driving the roasting mechanism to rotate, and the cover sealing mechanism is used for sealing the roasting mechanism so that graphite can be conveniently put into the roasting mechanism. The roasted graphite can be conveniently discharged; the graphite stirring device can provide speed reduction power to drive the roasting mechanism to rotate, graphite is overturned, the sealing performance and feeding and discharging are improved through the cover sealing mechanism, the roasting mechanism is supported and rotated through the mounting mechanism, the graphite is stably rotated and roasted, the graphite is stirred through rotation, the situation that the graphite adheres to the stirring device is reduced, and discharging and cleaning are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of graphite roasting, and in particular relates to a graphite roasting device. Background Art

[0002] Graphite is an important non-metallic product, widely used in batteries, coatings, chemicals, metallurgy and other fields. The graphite roasting process and graphitization are crucial steps in the graphite production process. Graphite roasting refers to the process of reducing graphite oxide to graphite by high temperature treatment. The roasting temperature is usually above 2500C, and an inert gas atmosphere, such as argon or nitrogen, is used to prevent the graphite oxide from burning again. The roasting process can effectively improve the integrity and crystallinity of graphite crystals. The principle of graphite roasting can be explained from two aspects: graphite crystal structure and chemical reaction. First, the graphite crystal structure is composed of a hexagonal structure composed of six carbon atoms. At high temperatures, the thermal vibration of the lattice structure during the roasting process will expand the graphite crystal, thereby promoting the diffusion and escape of impurity ions. Secondly, during the roasting process, graphite oxide reacts with the gas in the reducing atmosphere, and the oxygen atoms leave the graphite molecules to generate gaseous oxides, which improves the integrity and crystallinity of the graphite crystals. However, various graphite roastings on the market still have various problems.

[0003] For example, a graphite roasting device disclosed in the authorization announcement number CN117663809A realizes that the driving motor drives the stirring shaft to rotate forward, so that the rotating rake teeth can stir the graphite material and accelerate the roasting efficiency of the graphite material in the inner furnace body. When the driving motor drives the stirring shaft to rotate in the opposite direction, the spiral scraper can quickly push the material in the inner furnace body to the unloading barrel position, and quickly push out the graphite material in the inner furnace body. The unloading rate is fast and the unloading is cleaner. However, it does not solve the problems existing in the existing graphite roasting device, such as the internal stirring rods and stirring blades are prone to residual graphite, which is not easy to clean, and the servo motor as a power source is prone to cause the equipment to run too fast and cannot maintain the slow operation of the equipment. For this reason, we propose a graphite roasting device. Summary of the invention

[0004] The object of the present invention is to provide a graphite roasting device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a graphite roasting device, comprising a mounting mechanism, a roasting mechanism is movably mounted on the upper part of the mounting mechanism, one end of the roasting mechanism is fixedly connected to a power mechanism, and one end of the roasting mechanism is movably mounted with a capping mechanism; The mounting mechanism is used to support and install the roasting mechanism, and to enable the roasting mechanism to rotate stably. The power mechanism is arranged at one end of the roasting mechanism, and is used to provide power output to drive the roasting mechanism to rotate. The capping mechanism is used to seal the roasting mechanism, so as to facilitate the input of graphite into the roasting mechanism and the discharge of the roasted graphite.

[0006] Preferably, the installation mechanism includes two long beams, support legs are welded to both ends of the bottom of the two long beams, and cross beams are welded to both ends of the two long beams.

[0007] Preferably, two first vertical plates are welded on both sides of the upper part of the two horizontal beams, a supporting roller is movably installed between the two first vertical plates, an arch beam is welded in the middle of the two long beams, roller grooves are opened on both sides of the upper end of the arch beam, and a holding roller is movably installed inside the roller groove.

[0008] Preferably, a mounting plate is installed at one end of the two long beams through a column, a reinforcing plate is welded between one end of the mounting plate and the column, and a supporting frame is welded between the two columns and one end of the cross beam.

[0009] Preferably, the roasting mechanism includes a graphitization furnace body, one end of the graphitization furnace body is connected to an end cover, the ends of the graphitization furnace body and the end cover are fixedly provided with connecting flanges, and the two connecting flanges are directly fixedly connected by connecting bolts.

[0010] Preferably, first limiting rings are fixedly provided on both sides of the graphitization furnace body, a second limiting ring is fixedly provided on the middle part of the graphitization furnace body, the supporting rollers at both ends are movably fitted on the inner sides of the first limiting rings, and the holding rollers are movably fitted in the second limiting rings.

[0011] Preferably, the power mechanism includes a main shaft fixed at one end of the graphitization furnace body, the end of the main shaft is key-connected with a first gear, and the main shaft is movably connected to the support frame.

[0012] Preferably, the outer side of the first gear is meshedly connected with three planetary gears, and the outer sides of the three planetary gears are meshedly connected with inner and outer double-tooth gears. The two sides of the inner and outer double-tooth gears are respectively fixedly connected with a first baffle and a second baffle by an extended screw, and the first baffle is movably sleeved on the main shaft.

[0013] Preferably, the power mechanism includes a servo motor, a first worm is fixedly provided at the end of the output shaft of the servo motor, the first worm is meshingly connected with the outer sides of the inner and outer double-tooth gears, a hollow tube is movably installed through the middle of the main shaft, an air hole is opened on the upper part of the hollow tube, a filter is fixedly installed on the outer side of the air hole, a shift plate is fixedly connected to the lower side of the end of the hollow tube, and a thermal detection head is fixedly installed on the end of the hollow tube.

[0014] Preferably, a movable groove is provided inside the end cover, a gear groove is provided on the upper part of the movable groove, a sealing plate is movably provided inside the movable groove, an adjusting screw is threadedly connected to the upper end of the sealing plate, a worm wheel is provided on the upper end of the adjusting screw and is located inside the gear groove, a second worm is meshingly connected to one side of the worm wheel, a rotating handwheel is provided on the second worm on one side of the end cover, a first positioning plate is fixedly provided on the outer upper end of the end cover, a second positioning plate is fixedly provided on the outer side of the bottom of one side of the sealing plate, and a spring is fixedly connected between the first positioning plate and the second positioning plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the present invention is in use, the power mechanism is used to drive the roasting mechanism, so that the roasting mechanism can roll on the mounting mechanism, so that the graphite inside the roasting mechanism can be automatically turned over, and a single paddle is provided in the roasting mechanism to discharge the graphite. The single paddle can effectively reduce the internal structure, prevent the graphite from adhering to the stirring mechanism, and improve the equipment when discharging graphite. The internal graphite can be discharged cleanly, and a large amount of graphite is prevented from remaining, which is inconvenient to clean; In the power mechanism, the first worm drives the inner and outer double-toothed gears, and the inner and outer double-toothed gears drive the first gear through the planetary gears, so as to drive the roasting mechanism, and decelerate the power output of the servo motor, so as to prevent the servo motor from being too fast, causing the roasting mechanism to rotate too fast, and failing to effectively roast the internal graphite, and the graphite can be roasted uniformly; The sealing mechanism is set to facilitate the sealing of the roasting mechanism, so that graphite can be roasted in an inert gas environment. The second worm and the worm gear are set to facilitate the lifting and lowering of the sealing plate, so that the sealing plate can be opened and closed, so that graphite can be added and discharged. In order to prevent the second worm and the worm gear from loosening when the roasting mechanism rotates, the sealing plate is pushed by the elasticity of the spring, so that the sealing plate can always maintain sealing. The mounting mechanism supports the roasting mechanism through the supporting rollers, and enables the roasting mechanism to effectively realize rotation adjustment, maintain support and mobility, and the setting of the arch beam and the holding roller facilitates the holding of the roasting mechanism, preventing the roasting mechanism from being separated from the support of the mounting mechanism when rotating, thereby maintaining the rotation stability of the roasting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a right schematic diagram of the graphite roasting device of the present invention; Figure 2 It is the left schematic diagram of the graphite roasting device of the present invention; Figure 3 It is a schematic diagram of the left side of the installation mechanism of the graphite roasting device of the present invention; Figure 4 It is a schematic diagram of the right side of the installation mechanism of the graphite roasting device of the present invention; Figure 5 It is a schematic diagram of the roasting mechanism and power mechanism of the graphite roasting device of the present invention; Figure 6 It is a schematic diagram of the left side of the power mechanism of the graphite roasting device of the present invention; Figure 7 It is a right side schematic diagram of the power mechanism of the graphite roasting device of the present invention; Figure 8 It is a schematic diagram of the power mechanism of the graphite roasting device of the present invention; Fig. 9 A schematic diagram of a capping mechanism of a graphite roasting device of the present invention; Fig.10 It is a cross-sectional schematic diagram of the graphite roasting device of the present invention.

[0017] In the figure: 1. Installation mechanism; 101. Long beam; 102. Support leg; 103. Crossbeam; 104. First vertical plate; 105. Support roller; 106. Arch beam; 107. Roller groove; 108. Pressing roller; 109. Column; 110. Installation plate; 111. Support frame; 112. Reinforcement plate; 2. Power mechanism; 201. Servo motor; 202. Output shaft; 203. First worm; 204. Main shaft; 205. First gear; 206. Planetary gear; 207. Inner and outer double-tooth gear; 208. First baffle; 209. Second baffle; 210. Extension screw; 211, hollow tube; 212, filter; 213, air hole; 214, thermal detection head; 215, dial plate; 3, roasting mechanism; 301, graphitization furnace body; 302, end cover; 303, first limit ring; 304, second limit ring; 305, connecting flange; 306, connecting bolt; 4, capping mechanism; 401, sealing plate; 402, adjusting screw; 403, worm gear; 404, second worm; 405, rotating hand wheel; 406, first positioning plate; 407, spring; 408, second positioning plate; 409, movable groove; 410, gear groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 10 The present invention provides a technical solution: a graphite roasting device, comprising a mounting mechanism 1, a roasting mechanism 3 is movably mounted on the upper part of the mounting mechanism 1, one end of the roasting mechanism 3 is fixedly connected to a power mechanism 2, and one end of the roasting mechanism 3 is movably mounted to a capping mechanism 4; The mounting mechanism 1 is used to support and install the roasting mechanism 3, and to enable the roasting mechanism 3 to rotate stably. The power mechanism 2 is arranged at one end of the roasting mechanism 3, and the power mechanism 2 is used to provide power output to drive the roasting mechanism 3 to rotate. The capping mechanism 4 is used to seal the roasting mechanism 3, so as to facilitate the input of graphite into the roasting mechanism 3 and the discharge of the roasted graphite.

[0020] When in use, the mounting mechanism 1 is used to support the roasting mechanism 3 and maintain the stability of the roasting mechanism 3 when rotating, so that the roasting mechanism 3 can always rotate in contact with the mounting mechanism 1, and the power mechanism 2 is used to drive the roasting mechanism 3 so that the roasting mechanism 3 can stir the graphite inside by rotating to maintain the uniform roasting of the graphite. The capping mechanism 4 facilitates the input of graphite into the roasting mechanism 3 and the discharge of the roasted graphite.

[0021] Embodiment 1, the baking mechanism 3 is supported and the stability of the rotation process is maintained; The installation mechanism 1 includes two long beams 101, and support legs 102 are welded to the two ends of the bottom of the two long beams 101 respectively, and a cross beam 103 is welded to both ends of the two long beams 101. Two first vertical plates 104 are welded to the upper sides of the two cross beams 103, and a support roller 105 is movably installed between the two first vertical plates 104. An arch beam 106 is welded in the middle of the two long beams 101, and roller grooves 107 are provided on both sides of the upper end of the arch beam 106. A holding roller 108 is movably installed inside the roller groove 107. A mounting plate 110 is installed at one end of the two long beams 101 through a column 109, a reinforcing plate 112 is welded between one end of the mounting plate 110 and the column 109, and a support frame 111 is welded between the two columns 109 and one end of the cross beam 103.

[0022] The entire structure is supported and installed by the long beam 101 and the cross beam 103, and the setting of the support leg 102 is convenient for maintaining the balance stability of the equipment. The setting of the support roller 105 is convenient for supporting the roasting mechanism 3 to maintain the installation stability and rotation of the roasting mechanism 3. In order to maintain the stability of the roasting mechanism 3 during rotation, the roasting mechanism 3 is positioned by the arch beam 106 and the holding roller 108. While maintaining the rotation of the roasting mechanism 3, the roasting mechanism 3 can be held to prevent the roasting mechanism 3 from escaping from the support of the installation mechanism 1 during rotation. The setting of the mounting plate 110 is used to install and fix the power mechanism 2 to maintain the stable connection between the power mechanism 2, which can realize smooth power transmission and facilitate the roasting mechanism 3 to rotate. The setting of the support frame 111 is convenient for installing the main shaft 204 to prevent shaking during the power transmission rotation and improve the stability of the power transmission.

[0023] Embodiment 2: Installation and connection of the roasting mechanism 3 and stirring of the internal graphite; The roasting mechanism 3 includes a graphitization furnace body 301, one end of the graphitization furnace body 301 is connected to an end cover 302, the ends of the graphitization furnace body 301 and the end cover 302 are fixedly provided with connecting flanges 305, and the two connecting flanges 305 are directly fixedly connected by connecting bolts 306, the two sides of the graphitization furnace body 301 are respectively fixedly provided with first limiting rings 303, and the middle part of the graphitization furnace body 301 is fixedly provided with a second limiting ring 304, the supporting rollers 105 at both ends are respectively movably fitted on the inner side of the first limiting ring 303, and the holding roller 108 is movably fitted in the second limiting ring 304; When in use, the graphitization furnace body 301 and the end cover 302 are connected by connecting flanges 305 and connecting bolts 306 to maintain the sealing of the inside of the graphitization furnace body 301, so as to facilitate the graphite roasting in the inert gas environment inside the graphitization furnace body 301. In order to ensure that the graphitization furnace body 301 can be stably mounted on the mounting mechanism 1 and realize rotation, a first limiting ring 303 is provided at both ends of the graphitization furnace body 301, and the first limiting ring 303 is attached to the support The protruding edges on both sides of the roller 105 facilitate the limiting of the support roller 105, which can prevent the graphitization furnace body 301 from being separated from the support of the support roller 105 when rotating, and the second limiting ring 304 is set to press the roller 108 for fitting connection, and the upper part of the graphitization furnace body 301 is limited and pressed by the arch beam 106 and the pressing roller 108, so that the graphitization furnace body 301 can be stably installed on the mounting mechanism 1 and is easy to rotate on the mounting mechanism 1.

[0024] Embodiment 3: The power mechanism 2 realizes power output, drives the roasting mechanism 3 to rotate, self-stirs the graphite inside the roasting mechanism 3, and effectively reduces the rotation speed to maintain the rotation stability of the roasting mechanism 3; The power mechanism 2 includes a main shaft 204 fixed to one end of the graphitization furnace body 301, the end of the main shaft 204 is keyed to a first gear 205, the main shaft 204 is movably connected to the support frame 111, the outer side of the first gear 205 is meshed with three planetary gears 206, the outer sides of the three planetary gears 206 are meshed with inner and outer double-toothed gears 207, the two sides of the inner and outer double-toothed gears 207 are respectively fixedly connected with a first baffle 208 and a second baffle 209 through an extended screw 210, the first baffle 208 is movably sleeved on the main shaft 204, and the first baffle 208 is movably sleeved on the main shaft 204. On the shaft 204, the power mechanism 2 includes a servo motor 201, a first worm 203 is fixedly provided at the end of the output shaft 202 of the servo motor 201, the first worm 203 is meshedly connected with the outer side of the inner and outer double-toothed gear 207, a hollow tube 211 is movably installed through the middle of the main shaft 204, an air hole 213 is opened on the upper part of the hollow tube 211, a filter 212 is fixedly installed on the outer side of the air hole 213, a dial plate 215 is fixedly connected to the lower side of the end of the hollow tube 211, and a thermal detection head 214 is fixedly installed at the end of the hollow tube 211; When in use, power is output through the servo motor 201, and in order to reduce the installation space of the equipment, the inner and outer double-toothed gears 207 are driven by the output shaft 202 and the first worm 203, and the power can be turned, which is convenient for reducing the installation space of the equipment, and the three planetary gears 206 that are internally meshed and connected to the inner and outer double-toothed gears 207 can realize power transmission to the first gear 205, which is convenient for driving the first gear 205 to rotate, and realize driving the main shaft 204 and the graphitization furnace body 301, so that the graphitization furnace body 301 is rotated. When the graphitization furnace body 301 rotates, the graphite baked inside can be turned over and stirred, and no stirring mechanism is set inside, which can effectively reduce the problem of graphite sticking to the stirring mechanism and being unable to be discharged. The hollow tube 211 is penetrated through the graphitization furnace body 301 on the main shaft 204. 01, and an external gas supply device is connected, and an inert gas is filled into the graphitization furnace body 301 through the air hole 213, so that when the graphite is roasted, the oxidized graphite is prevented from burning again, and the stability of the graphite roasting is maintained; and a filter 212 is fixedly installed on the outside of the air hole 213, which can prevent the graphite from entering the inside of the air hole 213 and causing the blockage of the hollow tube 211, and the air permeability of the hollow tube 211 is maintained; and a paddle 215 is provided at the lower part of the hollow tube 211, which can paddle the graphite, so that when it is discharged, the graphite is discharged from the discharge port by rotating the graphitization furnace body 301, and the structure is relatively small, which can effectively reduce the adhesion of the graphite, and a thermal detection head 214 is provided at the end of the hollow tube 211, which can detect the temperature inside the graphitization furnace body 301, so as to obtain the real-time roasting temperature and improve the safety of roasting.

[0025] Embodiment 4: The setting of the capping mechanism 4 facilitates the maintenance of the sealing of the roasting mechanism 3 and facilitates the addition and discharge of graphite; A movable groove 409 is provided inside the end cover 302, a gear groove 410 is provided on the upper part of the movable groove 409, a sealing plate 401 is movably provided inside the movable groove 409, an adjusting screw 402 is internally threadedly connected to the upper end of the sealing plate 401, a worm gear 403 located inside the gear groove 410 is provided on the upper end of the adjusting screw 402, a second worm 404 is meshingly connected to one side of the worm gear 403, a rotating hand wheel 405 is provided on one side of the end cover 302, a first positioning plate 406 is fixedly provided on the upper end of the outer side of the end cover 302, a second positioning plate 408 is fixedly provided on the outer side of the bottom of one side of the sealing plate 401, and a spring 407 is fixedly connected between the first positioning plate 406 and the second positioning plate 408; When in use, the sealing plate 401 is installed through the movable groove 409 inside the end cover 302, and in order to open and close the sealing plate 401, the second worm 404 is rotated by rotating the hand wheel 405, so that the second worm 404 can drive the worm wheel 403 to rotate, so that the adjusting screw 402 can drive the sealing plate 401 to move up and down when rotating, so that the sealing plate 401 can block the discharge port of the end cover 302, maintain the sealing inside the roasting mechanism 3, and facilitate opening and closing, so that In order to input and discharge graphite, and to prevent the second worm 404 and the worm wheel 403 from loosening when the end cover 302 rotates with the graphitization furnace body 301, so that the sealing plate 401 cannot achieve the sealing setting, the sealing plate 401 is pushed by the spring 407 so that the sealing plate 401 can always be blocked at the discharge port to improve the sealing performance. By manually turning the rotating hand wheel 405, the sealing plate 401 can be moved upward, and then the spring 407 is compressed, so that the sealing plate 401 can be opened, so as to facilitate the discharge of the roasted graphite.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A graphite roasting device, comprising a mounting mechanism (1), characterized in that: A baking mechanism (3) is movably mounted on the upper part of the mounting mechanism (1); one end of the baking mechanism (3) is fixedly connected to a power mechanism (2); and one end of the baking mechanism (3) is movably mounted to a capping mechanism (4); The mounting mechanism (1) is used to support and mount the roasting mechanism (3) and enable the roasting mechanism (3) to rotate stably. The power mechanism (2) is arranged at one end of the roasting mechanism (3). The power mechanism (2) is used to provide power output to drive the roasting mechanism (3) to rotate. The capping mechanism (4) is used to seal the roasting mechanism (3) to facilitate the introduction of graphite into the roasting mechanism (3) and the discharge of the roasted graphite. The power mechanism (2) comprises a main shaft (204), and an end portion of the main shaft (204) is key-connected to a first gear (205); The outer side of the first gear (205) is meshingly connected to three planetary gears (206), and the outer sides of the three planetary gears (206) are meshingly connected to inner and outer double-toothed gears (207), and the two sides of the inner and outer double-toothed gears (207) are respectively fixedly connected to a first baffle plate (208) and a second baffle plate (209) via an extended screw rod (210), and the first baffle plate (208) is movably sleeved on the main shaft (204); The power mechanism (2) comprises a servo motor (201), a first worm (203) is fixedly provided at the end of an output shaft (202) of the servo motor (201), the first worm (203) is meshingly connected with the outer side of the inner and outer double-tooth gear (207), a hollow tube (211) is movably installed through the middle of the main shaft (204), an air hole (213) is opened at the upper part of the hollow tube (211), a filter (212) is fixedly installed on the outer side of the air hole (213), a shift plate (215) is fixedly connected to the lower side of the end of the hollow tube (211), and a thermal detection head (214) is fixedly installed at the end of the hollow tube (211).

2. A graphite roasting device according to claim 1, characterized in that: The mounting mechanism (1) comprises two long beams (101), the two ends of the bottom of the two long beams (101) are respectively welded with support legs (102), and the two ends of the two long beams (101) are jointly welded with a cross beam (103).

3. A graphite roasting device according to claim 2, characterized in that: Two first vertical plates (104) are welded to both sides of the upper part of the two horizontal beams (103), a supporting roller (105) is movably installed between the two first vertical plates (104), an arch beam (106) is welded in the middle of the two long beams (101), roller grooves (107) are provided on both sides of the upper end of the arch beam (106), and a holding roller (108) is movably installed inside the roller groove (107).

4. A graphite roasting device according to claim 3, characterized in that: A mounting plate (110) is mounted on one end of the two long beams (101) via a column (109); a reinforcing plate (112) is welded between one end of the mounting plate (110) and the column (109); and a supporting frame (111) is welded between the two columns (109) and one end of the cross beam (103).

5. A graphite roasting device according to claim 4, characterized in that: The roasting mechanism (3) comprises a graphitization furnace body (301), one end of the graphitization furnace body (301) is connected to an end cover (302), the ends of the graphitization furnace body (301) and the end cover (302) are both fixedly provided with connecting flanges (305), and the two connecting flanges (305) are directly fixedly connected via connecting bolts (306).

6. A graphite roasting device according to claim 5, characterized in that: First limiting rings (303) are fixedly provided on both sides of the graphitization furnace body (301), a second limiting ring (304) is fixedly provided in the middle of the graphitization furnace body (301), the supporting rollers (105) at both ends are movably fitted on the inner sides of the first limiting rings (303), and the holding rollers (108) are movably fitted in the second limiting rings (304).

7. A graphite roasting device according to claim 5, characterized in that: The main shaft (204) is movably connected to the support frame (111).

8. A graphite roasting device according to claim 5, characterized in that: A movable groove (409) is provided inside the end cover (302), a gear groove (410) is provided at the upper part of the movable groove (409), a sealing plate (401) is movably provided inside the movable groove (409), an adjusting screw (402) is internally threadedly connected to the upper end of the sealing plate (401), a worm wheel (403) located inside the gear groove (410) is provided at the upper end of the adjusting screw (402), a second worm (404) is meshingly connected to one side of the worm wheel (403), a rotating hand wheel (405) is provided on one side of the end cover (302), a first positioning plate (406) is fixedly provided at the upper end of the outer side of the end cover (302), a second positioning plate (408) is fixedly provided at the outer side of the bottom of one side of the sealing plate (401), and a spring (407) is fixedly connected between the first positioning plate (406) and the second positioning plate (408).

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