Conveying system for gypsum powder production

Abstract

The invention discloses a conveying system for gypsum powder production, and relates to the technical field of gypsum powder production. Comprising a bottom frame, an outer barrel is arranged at the upper end of the bottom frame, inner connecting frames are rotationally connected to the two ends of the inner side of the outer barrel, inner connecting sleeves are fixedly connected to the surfaces of the inner connecting frames, and bottom plates are symmetrically arranged on the inner sides of the inner connecting sleeves. Through the arrangement of an inner connecting sleeve accessory structure, the airflow direction can be periodically changed, and the inner connecting sleeve accessory structure is matched with an internal spiral cooling flow channel, so that low-temperature gas is uniformly blown into the barrel, and the situation that gypsum powder is caked due to sudden temperature drop or is caked due to low-temperature moisture absorption in the conveying process is avoided; the high-frequency micro-amplitude vibration can be generated in the reciprocating motion process to strip generated cakes, the surface structure can be continuously opened and closed to be used for conveying cold air, and the heat exchange efficiency of a cooling medium can be improved by matching with spinning of the barrel.

Description

Technical Field

[0001] The present invention relates to the technical field of gypsum powder production, and particularly relates to a conveying system for gypsum powder production. Background Art

[0002] Gypsum powder is one of the five major gel materials and is widely used in many fields such as construction, building materials, industrial molds, art models, chemical industry, agriculture, food processing, and medical beauty. It is an important industrial raw material, and gypsum powder has the characteristic of being brittle.

[0003] The utility model with the publication number CN209337575U discloses a gypsum powder batching and quantitative discharging system with pre-feeding. By installing a pre-feeding pipe screw conveyor between the quantitative feeding belt scale and the gypsum powder silo, it is supported by an independent frame and set at an upward inclination of 15 degrees to achieve stable material pre-feeding; on the premise that the position of the quantitative feeding belt scale remains unchanged, the installation direction can be adjusted to adapt to the size of the installation site, with flexible application and strong adaptability; the powder entering the receiving hood of the quantitative feeding belt scale is buffered by scraping with a scraping plate chain, and the powder on the belt scale is leveled, making it more accurate when entering the front-end measurement of the belt scale, realizing the functions of stable batching, frequency conversion adjustment, metering, and discharging of gypsum powder, being intensive and compact, with good economy, and suitable for large-scale popularization and application.

[0004] The above-mentioned prior art has certain deficiencies in the actual use process. It cannot perform stable cooling treatment on the produced gypsum powder during use, and cannot perform crushing treatment on the caked gypsum powder, ultimately resulting in a decline in the quality of the conveyed gypsum powder. Summary of the Invention

[0005] The purpose of the present invention is to provide a conveying system for gypsum powder production to solve the above technical problems.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A conveying system for gypsum powder production includes a chassis. An outer cylinder is provided at the upper end of the chassis. Inner connecting frames are rotatably connected to both ends inside the outer cylinder. Inner connecting sleeves are fixedly connected to the surfaces of the inner connecting frames. Bottom plates are symmetrically arranged inside the inner connecting sleeves.

[0008] The bottom surface of the bottom plate is provided with an opening. The top surface of the bottom plate is fixedly connected with a retaining shell. At the upper and lower ends inside the retaining shell, racks are symmetrically and fixedly connected. One end surface inside the retaining shell is fixedly connected with a positioning disk. Guiding grooves are symmetrically arranged on the surface of the positioning disk. On the surface of the positioning disk, third gears are symmetrically rotatably connected on one side of the guiding grooves. A toothed disk is sleeved and connected on the surface of the positioning disk. A guiding sleeve is welded and fixed on the surface of the toothed disk. A clamping tooth is arranged inside the toothed disk. The clamping tooth is meshed and connected with the third gear. A movable block is movably connected to the surface of the guiding groove. An inserting block is fixedly connected to the surface of the movable block. The inserting block is embedded and connected with the guiding groove. A docking tooth is fixedly connected to one side surface of the movable block. The docking tooth is meshed and connected with the third gear. A motor is embedded and installed inside the retaining shell. The output end of the motor is fixedly connected with a bevel gear. The bevel gear is meshed and connected with the toothed disk.

[0009] As a further scheme of the present invention: A feeding bin is fixedly connected to the top surface of the chassis near one end, and a discharging bin is fixedly connected to the top surface of the chassis near the other end.

[0010] As a further scheme of the present invention: A docking pipe is welded and fixed to the top of the side surface of the outer cylinder. Brackets are symmetrically welded and fixed to the side surface of the outer cylinder. Mounting frames are welded and fixed to both ends of the outer cylinder. Pad wheels are symmetrically rotatably connected near the bottom inside the mounting frames. A first gear is rotatably connected near the top inside the mounting frames. A flange is welded and fixed to the surface of the mounting frames. A driver is welded and fixed inside the outer cylinder. The driver is meshed and connected with the first gear.

[0011] As a further scheme of the present invention: An inner connection groove is arranged on the inner side surface of the inner connecting frame. Wheel frames are symmetrically and fixedly connected to the outer side surface of the inner connecting frame. A toothed rack is welded and fixed near the middle of the outer side surface of the inner connecting frame. A heat-conducting frame is welded and fixed to the surface of the inner connection groove.

[0012] As a further scheme of the present invention: Venting grooves are arranged on the side surface of the inner connection sleeve. A docking sleeve is fixedly connected inside the inner connection sleeve. Embedding grooves are symmetrically arranged on the inner side surface of the docking sleeve. Docking holes are equidistantly arranged on the surface of the embedding grooves. An annular frame is welded and fixed inside the inner connection sleeve.

[0013] As a further solution of the present invention: a side slot is provided on the side surface of the annular frame, a positive slot is provided on one end surface of the annular frame, an anti - detachment seat is fixedly welded on the surface of the annular frame, a notch is provided on the surface of the anti - detachment seat, a ring is embedded and connected inside the positive slot, a tooth groove is provided on the side surface of the ring, a plurality of convex teeth are fixedly connected at equal intervals on one end surface of the ring, a sleeve joint is sleeved on the surface of the anti - detachment seat, a latex strip is fixedly welded on the side surface of the sleeve joint, a sealing plate is fixedly welded on the side surface of the annular frame on one side of the anti - detachment seat, a motor is fixedly installed inside the inner connecting sleeve, a coupling is fixedly connected to the output end of the motor, a transmission shaft is fixedly connected to the output end of the coupling, a second gear is fixedly connected to the surface of the transmission shaft, and the second gear is meshed with the tooth groove.

[0014] As a further solution of the present invention: diamond - shaped holes are provided on the surface of the retaining shell, a connecting groove is provided in the middle of the surface of the positioning disk, a rubber ring is fixedly connected to the surface of the movable block, a transmission belt is sleeved on the surface of the guiding sleeve, and tensioning wheels are symmetrically rotatably connected inside the retaining shell.

[0015] The beneficial effects of the present invention:

[0016] By setting the inner connecting sleeve fitting structure, it can periodically change the air flow direction, cooperate with the internal spiral cooling flow channel, so that the low - temperature gas is evenly blown into the inside of the cylinder, to avoid the situation that the gypsum powder agglomerates due to sudden temperature drop or low - temperature moisture absorption during the transportation process. Cooperating with the bottom plate fitting structure, it can generate high - frequency micro - amplitude vibration during the reciprocating motion to peel off the formed agglomerates, and the surface structure can be continuously opened and closed for transmitting cold air, and cooperating with the self - rotation of the cylinder can promote the heat exchange efficiency of the cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 is the overall structural schematic diagram of the present invention;

[0019] Figure 2 is the structural schematic diagram of the transmission device of the present invention;

[0020] Figure 3 is the exploded schematic diagram of the outer cylinder fitting structure of the present invention;

[0021] Figure 4 is the connection schematic diagram of the inner connecting frame, inner connecting sleeve and bottom plate fitting structure of the present invention;

[0022] Figure 5 is the exploded schematic diagram of the inner connecting frame fitting structure of the present invention;

[0023] Figure 6It is a schematic diagram of the structural disassembly of the inner connection sleeve fitting of the present invention;

[0024] Figure 7 It is a schematic diagram of the structural disassembly of the annular frame fitting of the present invention;

[0025] Figure 8 It is a schematic diagram of the structural disassembly of the bottom plate fitting of the present invention.

[0026] In the figure: 1, chassis; 2, feeding bin; 3, blanking bin; 4, outer cylinder; 5, docking pipe; 6, bracket; 7, mounting frame; 8, cushion wheel; 9, first gear; 10, flange; 11, inner connecting frame; 12, inner connection groove; 13, wheel frame; 14, toothed rack; 15, heat conduction frame; 16, inner connection sleeve; 17, ventilation groove; 18, docking sleeve; 19, embedding groove; 20, docking hole; 21, annular frame; 22, side opening; 23, front opening; 24, anti - detachment seat; 25, notch; 26, ring; 27, tooth groove; 28, convex tooth; 29, sleeve joint; 30, latex strip; 31, sealing plate; 32, motor; 33, coupling; 34, transmission shaft; 35, second gear; 36, bottom plate; 37, opening; 38, rack; 39, positioning disk; 40, connecting groove; 41, guiding groove; 42, third gear; 43, toothed disk; 44, guiding sleeve; 45, locking tooth; 46, movable block; 47, inserting block; 48, docking tooth; 49, rubber ring; 50, transmission belt; 51, tensioning wheel. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] Please refer to Figures 1 - 8 As shown, the present invention is a conveying system for gypsum powder production, including a chassis 1. An outer cylinder 4 is arranged at the upper end of the chassis 1. Inner connecting frames 11 are rotatably connected to both ends inside the outer cylinder 4. An inner connection sleeve 16 is fixedly connected to the surface of the inner connecting frame 11. Bottom plates 36 are symmetrically arranged inside the inner connection sleeve 16;

[0029] The bottom surface of the bottom plate 36 is provided with an opening 37. The top surface of the bottom plate 36 is fixedly connected with a retaining shell. Inside the retaining shell, racks 38 are symmetrically and fixedly connected at the upper and lower ends. One end surface inside the retaining shell is fixedly connected with a positioning disk 39. Guide grooves 41 are symmetrically arranged on the surface of the positioning disk 39. On the surface of the positioning disk 39, third gears 42 are symmetrically rotatably connected on one side of the guide grooves 41. A toothed disk 43 is sleeved and connected on the surface of the positioning disk 39. A guide sleeve 44 is welded and fixed on the surface of the toothed disk 43. Inside the toothed disk 43, engaging teeth 45 are arranged. The engaging teeth 45 are meshed and connected with the third gears 42. A movable block 46 is movably connected to the surface of the guide groove 41. An insertion block 47 is fixedly connected to the surface of the movable block 46. The insertion block 47 is embedded and connected with the guide groove 41. A butt-joint tooth 48 is fixedly connected to one side surface of the movable block 46. The butt-joint tooth 48 is meshed and connected with the third gears 42. A motor is embedded and installed inside the retaining shell. The output end of the motor is fixedly connected with a bevel gear. The bevel gear is meshed and connected with the toothed disk 43;

[0030] At one end of the top surface of the chassis 1, a feeding bin 2 is fixedly connected. At the other end of the top surface of the chassis 1, a discharging bin 3 is fixedly connected. During the actual production and transportation process of gypsum powder, after the gypsum powder is put into the feeding bin 2 and transported, it will finally be transmitted to the designated position through the discharging bin 3;

[0031] At the top of the side surface of the outer cylinder 4, a butt-joint pipe 5 is welded and fixed. On the side surface of the outer cylinder 4, brackets 6 are symmetrically welded and fixed. At both ends of the outer cylinder 4, mounting frames 7 are welded and fixed. Inside the mounting frames 7, cushion wheels 8 are symmetrically rotatably connected near the bottom end. Inside the mounting frames 7, a first gear 9 is rotatably connected near the top end. On the surface of the mounting frames 7, flanges 10 are welded and fixed. Inside the outer cylinder 4, a driver is welded and fixed. The driver is meshed and connected with the first gear 9. During the actual operation process, in order to stably cool the gypsum powder inside, cold air can be introduced from the butt-joint pipe 5. By starting the driver, it can drive the inner connecting frame 11 to rotate in cooperation with the first gear 9, and finally drive other accessory structures inside to rotate to complete the uniform heating and transportation of the gypsum powder;

[0032] Inside the inner connecting frame 11, an inner connecting groove 12 is arranged. On the outer surface of the inner connecting frame 11, wheel frames 13 are symmetrically fixedly connected. Near the middle of the outer surface of the inner connecting frame 11, a toothed rack 14 is welded and fixed. On the surface of the inner connecting groove 12, a heat-conducting frame 15 is welded and fixed. After the first gear 9 rotates, it will cooperate with the engaged toothed rack 14. Under the combined action of the cushion wheels 8 and the inner connecting groove 12, the inner connecting frame 11 will rotate stably. The heat-conducting frame 15 arranged inside it can transfer the high temperature of the gypsum powder and can cooperate with the low temperature of the cold air to control the temperature to change slowly;

[0033] The side surface of the inner connecting sleeve 16 is provided with a venting groove 17, the inner side surface of the inner connecting sleeve 16 is fixedly connected with a docking sleeve 18, the inner side surface of the docking sleeve 18 is symmetrically provided with embedding grooves 19, the surface of the embedding grooves 19 is equidistantly provided with docking holes 20, and the inner side surface of the inner connecting sleeve 16 is welded and fixed with an annular frame 21;

[0034] A side groove 22 is provided on the side surface of the annular frame 21, a positive groove 23 is provided on one end surface of the annular frame 21, an anti-slip seat 24 is welded and fixed on the surface of the annular frame 21, a notch 25 is provided on the surface of the anti-slip seat 24, a ring 26 is embedded and connected inside the positive groove 23, a tooth groove 27 is provided on the side surface of the ring 26, a convex tooth 28 is fixedly connected to one end surface of the ring 26 at equal intervals, a sleeve 29 is sleeved and connected to the surface of the anti-slip seat 24, a latex strip 30 is welded and fixed to the side surface of the sleeve 29, a sealing plate 31 is welded and fixed to one side of the anti-slip seat 24 on the side surface of the annular frame 21, a motor 32 is fixedly installed on the inner side of the inner connecting sleeve 16, a coupling 33 is fixedly connected to the output end of the motor 32, a transmission shaft 34 is fixedly connected to the output end of the coupling 33, a second gear 35 is fixedly connected to the surface of the transmission shaft 34, and the second gear 35 is meshed with the tooth groove 27. After the cold air is poured in, the airflow will enter the pair through the venting groove 17. At the connection sleeve 18, during the continuous rotation of the inner connection sleeve 16, the air flow can be evenly blown to each group of air permeable grooves 17 to avoid a sudden drop in temperature in a small area. After the cold air blows to the sealing plate 31, it will be further blown to the neutral position, that is, the position of the anti-slip seat 24. Before this, the user can start the motor 32. Under the action of the coupling 33, the transmission shaft 34 will cooperate with the second gears 35 at both ends to embed into the tooth grooves 27 for linkage, thereby controlling the entire ring 26 to start rotating in the positive slot 23, and the convex teeth 28 will also cooperate with the slot structure inside the sleeve 29 in this process, so that the sleeve 29 can start rotating. The latex strips 30 cross-arranged on the surface of the sleeve 29 set in position will be staggered and blocked, so that the blown cold air will produce turbulence, so that it can finally be blown on the surface of the docking hole 20 as comprehensively and evenly as possible, so as to control the high-temperature gypsum powder to slowly and evenly cool down, and avoid agglomeration due to a sudden drop in temperature, thereby facilitating subsequent transportation and storage;

[0035] The surface of the retaining shell is provided with diamond-shaped holes. The surface of the positioning disk 39 is provided with a connecting groove 40 at the middle part. The surface of the movable block 46 is fixedly connected with a rubber ring 49. The surface of the guiding sleeve 44 is sleeved and connected with a transmission belt 50. The inside of the retaining shell is symmetrically and rotatably connected with a tension pulley 51. During the operation of the motor, the bevel gear on its surface will drive the gear disk 43 to rotate. Then, the internal engaging teeth 45 will drive the third gear 42 to rotate. Finally, in cooperation with the docking teeth 48, the movable block 46 will move on the surface of the guiding groove 41 by means of the insertion block 47, thereby dragging the rubber ring 49 and causing it to twist. During the periodic forward and reverse rotation of the motor, the rubber ring 49 will continuously open and close, so that the cold air will also be blown out periodically, thus cooperating to complete the cooling of the gypsum powder. Moreover, the rack 38 can also cooperate with the gear disk 43 to continuously generate high-frequency and small-amplitude vibrations during its rotation to remove the already formed lumps, and the vibration itself can promote the heat exchange efficiency of the cooling medium.

[0036] Working principle of the present invention: In the actual operation process, in order to stably cool the internal gypsum powder, a cold air flow can be introduced from the butt joint 5, and by starting the driver, the first gear 9 can be cooperated to drive the inner connecting frame 11 to rotate, and finally the other internal accessory structures can be driven to rotate to complete the uniform heating and transportation of the gypsum powder. After the first gear 9 rotates, it will cooperate with the meshing toothed frame 14. Under the cooperation of the pad wheel 8 and the inner connecting groove 12, the inner connecting frame 11 will rotate stably, and the heat conduction frame 15 arranged inside it can transmit the high temperature of the gypsum powder and It can cooperate with the low temperature of cold air to control the slow change of temperature. After the cold air is poured in, the airflow will enter the docking sleeve 18 through the air permeable groove 17. During the continuous rotation of the inner connecting sleeve 16, the airflow can be evenly blown to each group of air permeable grooves 17 to avoid a sudden drop in temperature in a small area. After the cold air blows to the sealing plate 31, it will further blow to the neutral position, that is, the position of the anti-disengagement seat 24. Before this, the user can start the motor 32. Under the action of the coupling 33, the transmission shaft 34 will cooperate with the second gears 35 at both ends to embed into the tooth groove 27 for linkage, thereby controlling The entire ring 26 starts to rotate in the positive slot 23, and the convex teeth 28 will also cooperate with the slot structure inside the sleeve 29 during this process, so that the sleeve 29 can start to rotate, and the latex strips 30 cross-arranged on the surface of the sleeve 29 arranged in the opposite position will be staggered and blocked, so that the blown cold air will produce turbulence, so that it can finally be blown on the surface of the docking hole 20 as comprehensively and evenly as possible, so as to control the high-temperature gypsum powder to cool down slowly and evenly, and avoid agglomeration due to sudden temperature drop, so as to facilitate subsequent transportation and storage. During the operation of the motor, the bevel gear on its surface will drive the toothed disc 43 to rotate, and then the inner The side latching teeth 45 will drive the third gear 42 to rotate, and finally cooperate with the docking teeth 48, so that the movable block 46 uses the plug block 47 to move on the surface of the guide groove 41, thereby dragging the rubber ring 49 to cause it to twist. During the periodic forward and reverse rotation of the motor, the rubber ring 49 will continue to open and close, so that cold air will also be blown out periodically, thereby cooperating to complete the cooling of the gypsum powder, and the rack 38 can also cooperate with the toothed disc 43 to continuously generate high-frequency micro-vibrations during its rotation to remove the lumps that have been produced, and the vibration itself can promote the heat exchange efficiency of the cooling medium.

[0037] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A conveying system for gypsum powder production, comprising a base frame (1), characterized in that: An outer cylinder (4) is arranged at the upper end of the base frame (1), and an inner connecting frame (11) is rotatably connected to the inner side of the outer cylinder (4) at both ends, and an inner connecting sleeve (16) is fixedly connected to the surface of the inner connecting frame (11), and a bottom plate (36) is symmetrically arranged on the inner side of the inner connecting sleeve (16); The bottom surface of the bottom plate (36) is provided with an opening (37), the top surface of the bottom plate (36) is fixedly connected with a stop shell, the interior of the stop shell is symmetrically fixedly connected with racks (38) at the upper and lower ends, the interior of the stop shell is fixedly connected with a positioning plate (39) on one end surface, the surface of the positioning plate (39) is symmetrically provided with guide grooves (41), the surface of the positioning plate (39) is symmetrically rotatably connected with a third gear (42) on one side of the guide groove (41), the surface of the positioning plate (39) is sleeved with a toothed plate (43), the surface of the toothed plate (43) is welded and fixed with a guide sleeve (44), the A latching tooth (45) is provided on the inner side of the toothed disc (43), and the latching tooth (45) is meshedly connected with the third gear (42). A movable block (46) is movably connected to the surface of the guide groove (41), and an inserting block (47) is fixedly connected to the surface of the movable block (46). The inserting block (47) is embedded in the guide groove (41). A docking tooth (48) is fixedly connected to one side surface of the movable block (46), and the docking tooth (48) is meshedly connected with the third gear (42). A motor is embedded and installed inside the stopper housing, and a bevel gear is fixedly connected to the output end of the motor, and the bevel gear is meshedly connected with the toothed disc (43).

2. A gypsum powder production conveying system according to claim 1, characterized in that: A feeding bin (2) is fixedly connected to one end of the top surface of the base frame (1), and a lowering bin (3) is fixedly connected to the other end of the top surface of the base frame (1).

3. A gypsum powder production conveying system according to claim 1, characterized in that: A butt-joint tube (5) is welded and fixed at the top end of the side surface of the outer cylinder (4), a bracket (6) is symmetrically welded and fixed to the side surface of the outer cylinder (4), mounting frames (7) are welded and fixed at both ends of the outer cylinder (4), a washer (8) is symmetrically rotatably connected to the inside of the mounting frame (7) near the bottom end, a first gear (9) is rotatably connected to the inside of the mounting frame (7) near the top end, a flange (10) is welded and fixed to the surface of the mounting frame (7), and a driver is welded and fixed to the inside of the outer cylinder (4), and the driver is meshingly connected to the first gear (9).

4. A gypsum powder production conveying system according to claim 1, characterized in that: The inner surface of the inner connecting frame (11) is provided with an inner connecting groove (12), the outer surface of the inner connecting frame (11) is symmetrically fixedly connected to a wheel frame (13), a toothed frame (14) is welded and fixed near the middle of the outer surface of the inner connecting frame (11), and a heat conducting frame (15) is welded and fixed to the surface of the inner connecting groove (12).

5. A gypsum powder production conveying system according to claim 1, characterized in that: The side surface of the inner connecting sleeve (16) is provided with a venting groove (17), the interior of the inner connecting sleeve (16) is fixedly connected with a docking sleeve (18), the inner side surface of the docking sleeve (18) is symmetrically provided with embedding grooves (19), the surface of the embedding grooves (19) is equidistantly provided with docking holes (20), and the interior of the inner connecting sleeve (16) is welded and fixed with an annular frame (21).

6. A gypsum powder production conveying system according to claim 5, characterized in that: The side surface of the annular frame (21) is provided with a side groove (22), one end surface of the annular frame (21) is provided with a front groove (23), the surface of the annular frame (21) is welded with an anti-slip seat (24), the surface of the anti-slip seat (24) is provided with a notch (25), a ring (26) is embedded in the inside of the front groove (23), a tooth groove (27) is provided on the side surface of the ring (26), one end surface of the ring (26) is equidistantly fixedly connected with a convex tooth (28), the surface of the anti-slip seat (24) is sleeved with a sleeve joint (29) ), a latex strip (30) is welded and fixed to the side surface of the sleeve (29), a sealing plate (31) is welded and fixed to the side surface of the annular frame (21) on one side of the anti-slip seat (24), a motor (32) is fixedly installed on the inner side of the inner connecting sleeve (16), the output end of the motor (32) is fixedly connected to a coupling (33), the output end of the coupling (33) is fixedly connected to a transmission shaft (34), the surface of the transmission shaft (34) is fixedly connected to a second gear (35), and the second gear (35) is meshingly connected to the tooth groove (27).

7. A gypsum powder production conveying system according to claim 1, characterized in that: The surface of the stopper shell is provided with a diamond-shaped hole, the surface of the positioning plate (39) is provided with a connecting groove (40) at the middle, the surface of the movable block (46) is fixedly connected with a rubber ring (49), the surface of the guide sleeve (44) is sleeved with a transmission belt (50), and the interior of the stopper shell is symmetrically rotatably connected with a tensioning wheel (51).

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