Stirring tank for production of melamine cyanurate flame retardant

Abstract

The utility model relates to the technical field of melamine cyanurate production, and provides a stirring tank for melamine cyanurate flame retardant production, which comprises a tank body, an inlet / outlet is arranged on the left side surface of the tank body, a sliding device is arranged on the outer side surface of the tank body, and the sliding device comprises a control block, a guide wheel, a guide rail, a rotating block and a sliding ring. The guide wheels are arranged on the outer side face of the tank body, the control blocks are rotationally connected to the two sides of the axes of the guide wheels, the spur gear and the reverse gear are driven to rotate together when the small gear rotates, and at the moment, the spur gear and the reverse gear are opposite in rotation direction, so that the tank body and the material overturning device rotate oppositely, and the overturning efficiency is improved. And the material turning columns slide out along the hollow columns, so that the material turning plates are in contact with the inner wall of the tank body, the materials below can be turned over more uniformly, the materials are prevented from being accumulated below the tank body, and the problem of non-uniform stirring in the prior art is solved through the technical scheme.

Description

Technical Field

[0001] The utility model relates to the technical field of melamine production, and specifically relates to a stirring tank for producing melamine cyanurate flame retardant. Background Art

[0002] Melamine cyanurate flame retardant is a commonly used flame retardant, widely used in plastics, rubber, textiles and other industries to improve the flame retardant properties of materials. In the production process of melamine cyanurate flame retardant, the mixing tank is one of the most important equipment. The mixing tank is used to fully mix various raw materials and ensure that the flame retardant is evenly dispersed in the solvent or matrix.

[0003] The patent with application number CN202121217610.9 discloses a preparation device for flame retardant of OSB board, which includes a flame retardant mixing and stirring tank, a liquid material feeding mechanism and a solid material feeding mechanism; a liquid material inlet is provided on one side of the top of the flame retardant mixing and stirring tank, and a solid material inlet is provided on the other side; a stirring motor is provided at the top center of the flame retardant mixing and stirring tank, and the rotating shaft of the stirring motor is connected to the stirring shaft extending into the tank body of the flame retardant mixing and stirring tank and drives it to rotate, and a pair of paddle assemblies are provided on the stirring shaft. The advantages of this patent are: the preparation of flame retardant is convenient and fast, saving manpower and material resources, and improving work efficiency. However, this patent still has the problems of uneven stirring and much material waste. Therefore, it is very necessary to design a stirring tank for the production of melamine cyanurate flame retardant that can stir materials more evenly and reduce material waste. Utility Model Content

[0004] The utility model provides a stirring tank for producing melamine cyanurate flame retardant, which solves the problems of uneven stirring and reduced material waste in the related technology.

[0005] The technical scheme of the utility model is as follows: a stirring tank for the production of melamine cyanurate flame retardant, comprising a tank body, an inlet and an outlet are arranged on the left side of the tank body, a sliding device is arranged on the outer side of the tank body, the sliding device comprises a control block, a guide wheel, a guide rail, a rotating block, and a sliding ring, the guide wheel is arranged on the outer side of the tank body, the control block is rotatably connected to both sides of the axis of the guide wheel, the sliding ring is fixedly connected to one end of the control block away from the guide wheel, the guide rail is arranged at two places, and both guide rails are fixedly connected to the outer side of the tank body, the rotating block is fixedly connected to the outer side of the tank body, and the sliding ring is arranged There are two locations, the control block is set at eight locations, the control block array is distributed on the left and right sides of the sliding ring, the guide wheel is set at four locations, the guide wheels are all rotatably connected to one end of the control block close to the tank body, the rotating block is set at five locations, the guide wheel is in contact with the outer surface of the tank body, the guide rail and the guide wheel are fitted with each other, and a motor device is set on the right side of the tank body, the motor device includes a motor, a control ring, a main shaft, a stabilizing block, a spur gear, a reverse gear, a pinion, a control panel, and a tank body shaft, the tank body shaft is fixedly connected to the right axis of the tank body, the reverse gear is fixedly connected to the right end of the tank body shaft, and the pinion The wheel is meshed and connected to the right side of the reverse gear, the spur gear is meshed and connected to the right side of the pinion gear, the stabilizing block is fixedly connected to the right side of the spur gear, the main shaft is fixedly connected to the axis of the spur gear, the motor is fixedly connected to the front side of the pinion gear, the control ring is fixedly connected to the outer side of the motor, and the control plate is fixedly connected to the front side of the control ring. After the material is put into the machine, the external motor rotates the pinion gear, and the rotation of the pinion gear drives the spur gear and the reverse gear to rotate together. At this time, the rotation directions of the spur gear and the reverse gear are opposite. The spur gear rotates the main shaft to make the blowing plate connected to the blowing column rotate to blow the materials on both sides, and the main shaft The rotation causes the empty column to rotate, which drives the turning plate connected to the turning column to rotate through the empty column. When the turning column rotates to the bottom of the tank body, the turning column will slide out along the empty column under the action of gravity to make the turning plate contact the inner wall of the tank body. When the turning column rotates, it drives the inner plate connected to the inner column to rotate together; the rotation of the small gear drives the spur gear and the reverse gear to rotate together at the same time. At this time, the rotation directions of the spur gear and the reverse gear are opposite, so that the tank body and the turning device rotate in opposite directions to improve the turning efficiency. When the turning column rotates to the bottom of the tank body, the turning column slides out along the empty column to make the turning plate contact the inner wall of the tank body, which can turn the material below more evenly to prevent the material from accumulating under the tank body.

[0006] The technical solution of the utility model is as follows: the pinion is provided at two places, and the left and right sides of the pinion are meshed with the reverse gear and the spur gear. The main shaft passes through the stabilizing block and the reverse gear and the spur gear to the left side of the tank body. A flipping device is provided inside the tank body, and the flipping device includes a flipping plate, a blowing plate, a blowing column, an inner plate, an inner column, a flipping column, and an empty column. The blowing columns are fixedly connected to the outer surface of the main shaft, the blowing plates are fixedly connected to one end of the blowing column away from the main shaft, the empty columns are fixedly connected to the outer surface of the main shaft, the flipping column is slidably connected to the inside of the empty column, and the flipping plates are fixedly connected to the inner end of the empty column away from the main shaft. The cam is fixedly connected to one end of the material turning column, the inner column is fixedly connected to the rear side of the material turning plate, the inner plate is fixedly connected to one end of the inner column away from the material turning plate, the outer side of the sliding ring is hingedly connected to a supporting leg, the inner side of the supporting leg is fixedly connected to a rotating plate, the lower side of the rotating plate is fixedly connected to a hydraulic box, the left side of the supporting leg is fixedly connected to a bottom plate, the side of the bottom plate is slidably connected to an inclined plate, the upper side of the bottom plate is fixedly connected to an articulated seat, the right side of the articulated seat is fixedly connected to a hydraulic rod, the side of the inclined plate is fixedly connected to a spring seat, the inner wall of the spring seat is slidably connected to a spring block, the outer side of the sliding ring A long plate is fixedly connected, and a small shaft is rotatably connected to the front side of the support leg. The small shaft is set at two places, and the small shaft passes through the support leg and the sliding ring. The long plate is set at two places, and the support leg is set at two places. A spring is arranged inside the spring seat, and the upper and lower ends of the spring are respectively fixedly connected to the spring seat and the spring block. When the tank body is tilted, the spring seat on the inclined plate between the rotating plate and the bottom plate contacts the spring block and the rotating block on the outer side of the tank body. After the material is turned over, the small gear is rotated by the external motor, driving the counter gear and the tank body shaft to make the tank body rotate through the guide wheel restricted by the guide rail and fixed between the control block and the sliding ring to rotate the inlet and outlet To the bottom, the hydraulic box under the rotating plate and the hydraulic rod between the hinged seat above the bottom plate are contracted, so that the sliding ring connected to the supporting legs can rotate through the small shaft to tilt the tank body and stabilize the tank body with the long plate. When the tank body is tilted, the spring seat on the inclined plate between the rotating plate and the bottom plate contacts with the spring block and the rotating block on the outer side of the tank body, and the tank body is vibrated through the spring between the spring seat and the spring block. When the tank body is tilted, the spring seat on the inclined plate between the rotating plate and the bottom plate contacts with the spring block and the rotating block on the outer side of the tank body, and the tank body is vibrated through the spring between the spring seat and the spring block. The attached materials are dropped by vibration and the materials can be discharged more quickly.

[0007] The working principle and beneficial effects of the utility model are:

[0008] In the utility model, a sliding device is provided; the control block, guide wheel, guide rail, rotating block, sliding ring, and small gear rotate and drive the spur gear and the reverse gear to rotate together. At this time, the rotation directions of the spur gear and the reverse gear are opposite, so that the tank body and the turning device rotate in opposite directions to improve the turning efficiency.

[0009] In the utility model, a material turning device, a material turning plate, a material blowing plate, a material blowing column, an inner plate, an inner column, a material turning column and an empty column are provided. When the material turning column rotates to the bottom of the tank body, the material turning column slides out along the empty column so that the material turning plate contacts the inner wall of the tank body, thereby turning the material below more evenly and preventing the material from piling up under the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0011] Figure 1 This is a schematic diagram of the front three-dimensional structure of the utility model;

[0012] Figure 2 For this utility model Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0013] Figure 3 For this utility model Figure 1 Schematic diagram of the enlarged structure of B;

[0014] Figure 4 This is a schematic diagram of the internal structure of the tank body of the utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the material turning device of the utility model;

[0016] In the figure: 1. tank body; 2. inlet and outlet; 3. sliding device; 31. control block; 32. guide wheel; 33. guide rail; 34. rotating block; 35. sliding ring; 4. motor device; 41. motor; 42. control ring; 43. main shaft; 44. stabilizing block; 45. spur gear; 46. reverse gear; 47. small gear; 48. control board; 49. tank body shaft; 5. small shaft; 6. long board; 7. supporting leg; 8. rotating board; 9. tilting board; 10. bottom board; 11. hinge seat; 12. hydraulic rod; 13. spring seat; 14. spring block; 15. turning device; 151. turning plate; 152. blowing plate; 153. blowing column; 154. inner plate; 155. inner column; 156. turning column; 157. empty column; 16. hydraulic box. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Example 1

[0019] like Figure 1 to Figure 5 As shown, the present embodiment proposes a stirring tank for the production of melamine cyanurate flame retardant, comprising a tank body 1, an inlet and outlet 2 being arranged on the left side of the tank body 1, a sliding device 3 being arranged on the outer side of the tank body 1, the sliding device 3 comprising a control block 31, a guide wheel 32, a guide rail 33, a rotating block 34, and a sliding ring 35, the guide wheel 32 being arranged on the outer side of the tank body 1, the control block 31 being rotatably connected to both sides of the axis of the guide wheel 32, the sliding ring 35 being fixedly connected to one end of the control block 31 away from the guide wheel 32, the guide rail 33 being arranged at two locations, and both guide rails 33 being fixedly connected to the outer side of the tank body 1, the rotating block 34 being fixedly connected to the outer side of the tank body 1, the sliding ring 35 being arranged at two locations, the control block 31 being arranged at eight locations, the control blocks 31 being arrayed on the left and right sides of the sliding ring 35, the guide wheel 32 being arranged at four locations, and the guide wheels 32 being rotatably connected to one end of the control block 31 close to the tank body 1 The end, the rotating block 34 is provided with five places, the guide wheel 32 is in contact with the outer surface of the tank body 1, the guide rail 33 and the guide wheel 32 are fitted with each other, and the motor device 4 is provided on the right side of the tank body 1. The motor device 4 includes a motor 41, a control ring 42, a main shaft 43, a stabilizing block 44, a spur gear 45, a reverse gear 46, a pinion 47, a control board 48, and a tank body shaft 49. The tank body shaft 49 is fixedly connected to the right side axis of the tank body 1, the reverse gear 46 is fixedly connected to the right end of the tank body shaft 49, the pinion 47 is meshedly connected to the right side of the reverse gear 46, the spur gear 45 is meshedly connected to the right side of the pinion 47, the stabilizing block 44 is fixedly connected to the right side of the spur gear 45, the main shaft 43 is fixedly connected to the axis of the spur gear 45, the motor 41 is fixedly connected to the front side of the pinion 47, the control ring 42 is fixedly connected to the outer side of the motor 41, and the control board 48 is fixedly connected to the front side of the control ring 42.

[0020] In this embodiment, the rotation of the pinion 47 drives the spur gear 45 and the reverse gear 46 to rotate together. At this time, the rotation directions of the spur gear 45 and the reverse gear 46 are opposite, so that the tank body 1 and the turning device 15 rotate in opposite directions to improve the turning efficiency. When the turning column 156 rotates to the bottom of the tank body 1, the turning column 156 slides out along the empty column 157 to make the turning plate 151 contact the inner wall of the tank body 1, which can more evenly turn the material below to prevent the material from accumulating under the tank body 1.

[0021] Example 2

[0022] like Figure 1 to Figure 5As shown, based on the same concept as the above-mentioned embodiment 1, in this embodiment, the turning device 15 includes a turning plate 151, a blowing plate 152, a blowing column 153, an inner plate 154, an inner column 155, a turning column 156, and a hollow column 157. The blowing column 153 is fixedly connected to the outer surface of the main shaft 43, the blowing plate 152 is fixedly connected to one end of the blowing column 153 away from the main shaft 43, the hollow column 157 is fixedly connected to the outer surface of the main shaft 43, and the turning column 156 is slidably connected to the inner surface of the main shaft 43. The material flipping plate 151 is connected to the inside of the hollow column 157, and the material flipping plate 151 is fixedly connected to one end of the material flipping column 156 away from the main shaft 43. The inner column 155 is fixedly connected to the rear side of the material flipping plate 151, and the inner plate 154 is fixedly connected to one end of the inner column 155 away from the material flipping plate 151. The outer side of the sliding ring 35 is hingedly connected to the support leg 7, and the inner side of the support leg 7 is fixedly connected to the rotating plate 8. The lower side of the rotating plate 8 is fixedly connected to the hydraulic box 16, and the left side of the support leg 7 is fixedly connected to the bottom plate 10 , the upper side of the bottom plate 10 is slidably connected with an inclined plate 9, the upper side of the bottom plate 10 is fixedly connected with an articulated seat 11, the right side of the articulated seat 11 is fixedly connected with a hydraulic rod 12, the upper side of the inclined plate 9 is fixedly connected with a spring seat 13, the inner wall of the spring seat 13 is slidably connected with a spring block 14, the outer side of the sliding ring 35 is fixedly connected with a long plate 6, the front side of the supporting leg 7 is rotatably connected with a small shaft 5, the small shaft 5 is provided with two places, the small shaft 5 passes through the supporting leg 7 and the sliding ring 35, the long plate 6 is provided with two places, the supporting leg 7 is provided with two places, a spring is provided inside the spring seat 13, and the upper and lower ends of the spring are respectively fixedly connected with the spring seat 13 and the spring block 14. When the tank body 1 is tilted, the spring seat 13 on the inclined plate 9 between the rotating plate 8 and the bottom plate 10 contacts with the spring block 14 and the rotating block 34 on the outer side of the tank body 1, and the spring between the spring seat 13 and the spring block 14 causes the tank body 1 to vibrate, and the attached material can be made to fall through the vibration, so that the material can be discharged more quickly, reducing material waste and improving efficiency.

[0023] In this embodiment, after the material is turned over, the pinion 47 is rotated by the external motor 41, driving the counter gear 46 and the tank shaft 49 to rotate the tank 1 through the guide wheel 32 restricted by the guide rail 33 and fixed between the control block 31 and the sliding ring 35, so that the inlet and outlet 2 is turned downward, and the hydraulic box 16 under the rotating plate 8 and the hydraulic rod 12 between the hinge seat 11 above the bottom plate 10 are contracted, so that the sliding ring 35 connected to the support leg 7 is rotated through the small shaft 5 to tilt the tank 1 and stabilize the tank 1 with the long plate 6. When the tank 1 tilts, the spring seat 13 on the tilting plate 9 between the rotating plate 8 and the bottom plate 10 contacts the spring block 14 and the rotating block 34 on the outer side of the tank 1, and the tank 1 vibrates through the spring between the spring seat 13 and the spring block 14.

[0024] When the tank body 1 is tilted, the spring seat 13 on the inclined plate 9 between the rotating plate 8 and the bottom plate 10 contacts the spring block 14 and the rotating block 34 on the outer side of the tank body 1, and the tank body 1 is vibrated through the spring between the spring seat 13 and the spring block 14. The attached materials fall down through the vibration, which can discharge the materials more quickly, reduce material waste and improve efficiency.

[0025] Working principle: When the machine starts working, the external motor 41 rotates the pinion 47, so that the pinion 47 drives the counter gear 46 and the tank shaft 49 to rotate the tank 1. When the tank 1 rotates, it is restricted and positioned between the control block 31 and the sliding ring 35 by the guide rail 33, so that the guide wheel 32 rotates to turn the inlet and outlet 2 to the upper side to facilitate the loading of materials.

[0026] After the material is put into the tank, the external motor 41 rotates the pinion 47, and the rotation of the pinion 47 drives the spur gear 45 and the reverse gear 46 to rotate together. At this time, the rotation directions of the spur gear 45 and the reverse gear 46 are opposite. The spur gear 45 rotates the main shaft 43 to rotate the blowing plate 152 connected to the blowing column 153 to blow the materials on both sides. The rotation of the main shaft 43 rotates the empty column 157, and the turning plate 151 connected to the turning column 156 is driven to rotate through the empty column 157. When the turning column 156 rotates to the bottom of the tank body 1, the turning column 156 will slide along the empty column 157 under the action of gravity. When the material turning column 156 rotates, it drives the inner plate 154 connected to the inner column 155 to rotate together. The pinion 47 rotates and drives the spur gear 45 and the reverse gear 46 to rotate together. At this time, the spur gear 45 and the reverse gear 46 rotate in opposite directions, so that the tank body 1 and the material turning device 15 rotate in opposite directions to improve the turning efficiency. When the material turning column 156 rotates to the bottom of the tank body 1, the material turning column 156 slides out along the hollow column 157 to make the material turning plate 151 contact the inner wall of the tank body 1, which can turn the materials below more evenly to prevent the materials from accumulating below the tank body 1.

[0027] After the material is turned over, the pinion 47 is rotated by the external motor 41, driving the counter gear 46 and the tank shaft 49 to rotate the tank 1 through the guide wheel 32 restricted by the guide rail 33 and fixed between the control block 31 and the sliding ring 35, so that the inlet and outlet 2 is turned downward, and the hydraulic box 16 under the rotating plate 8 and the hydraulic rod 12 between the hinge seat 11 above the bottom plate 10 are contracted, so that the sliding ring 35 connected to the support leg 7 is rotated through the small shaft 5 to tilt the tank 1 and stabilize the tank 1 with the long board 6. When the tank 1 is tilted, the rotating plate 8 The spring seat 13 on the inclined plate 9 between the rotating plate 8 and the bottom plate 10 contacts the spring block 14 and the rotating block 34 on the outer side of the tank body 1, and the tank body 1 is vibrated through the spring between the spring seat 13 and the spring block 14. When the tank body 1 is tilted, the spring seat 13 on the inclined plate 9 between the rotating plate 8 and the bottom plate 10 contacts the spring block 14 and the rotating block 34 on the outer side of the tank body 1, and the tank body 1 is vibrated through the spring between the spring seat 13 and the spring block 14. The attached materials are dropped by the vibration, and the materials can be discharged more quickly, thereby reducing material waste and improving efficiency.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stirring tank for producing melamine cyanurate flame retardant, comprising a tank body (1), characterized in that: The tank body (1) is provided with an inlet and outlet (2) on the left side thereof. The tank body (1) is provided with a sliding device (3) on the outer side thereof. The sliding device (3) comprises a control block (31), a guide wheel (32), a guide rail (33), a rotating block (34), and a sliding ring (35). The guide wheel (32) is provided on the outer side of the tank body (1). The control block (31) is rotatably connected to both sides of the axis of the guide wheel (32). The sliding ring (35) is fixedly connected to an end of the control block (31) away from the guide wheel (32). The guide rail (33) is provided at two locations, and both of the guide rails (33) are fixedly connected to the outer side of the tank body (1). The rotating block (34) is fixedly connected to the outer side of the tank body (1).

2. A stirring tank for producing melamine cyanurate flame retardant according to claim 1, characterized in that: The sliding ring (35) is provided at two locations, the control block (31) is provided at eight locations, the control blocks (31) are arranged in an array on the left and right sides of the sliding ring (35), the guide wheel (32) is provided at four locations, the guide wheels (32) at the four locations are all rotatably connected to one end of the control block (31) close to the tank body (1), the rotating block (34) is provided at five locations, the guide wheel (32) is in contact with the outer surface of the tank body (1), and the guide rail (33) and the guide wheel (32) are in contact with each other.

3. A stirring tank for producing melamine cyanurate flame retardant according to claim 2, characterized in that: The right side of the tank body (1) is provided with a motor device (4), the motor device (4) comprising a motor (41), a control ring (42), a main shaft (43), a stabilizing block (44), a spur gear (45), a counter gear (46), a pinion gear (47), a control panel (48), and a tank body shaft (49), wherein the tank body shaft (49) is fixedly connected to the right side axis of the tank body (1), the counter gear (46) is fixedly connected to the right end of the tank body shaft (49), the pinion gear (47) is meshedly connected to the right side of the counter gear (46), the spur gear (45) is meshedly connected to the right side of the pinion gear (47), and the stabilizing block (49) is fixedly connected to the right side axis of the tank body (1). The main shaft (43) is fixedly connected to the axis of the spur gear (45), the motor (41) is fixedly connected to the front side of the pinion gear (47), the control ring (42) is fixedly connected to the outer side of the motor (41), and the control plate (48) is fixedly connected to the front side of the control ring (42). The pinion gear (47) is provided at two locations, and the left and right sides of the pinion gear (47) are meshed with the counter gear (46) and the spur gear (45). The main shaft (43) passes through the stabilizing block (44), the counter gear (46) and the spur gear (45) to the left side of the tank body (1).

4. A stirring tank for producing melamine cyanurate flame retardant according to claim 3, characterized in that: A material turning device (15) is arranged inside the tank body (1), and the material turning device (15) comprises a material turning plate (151), a material blowing plate (152), a material blowing column (153), an inner plate (154), an inner column (155), a material turning column (156), and a hollow column (157). The material blowing column (153) is fixedly connected to the outer surface of the main shaft (43), and the material blowing plate (152) is fixedly connected to the material blowing column (153) away from the main shaft (43). At one end, the hollow column (157) is fixedly connected to the outer surface of the main shaft (43), the turning column (156) is slidably connected to the inside of the hollow column (157), the turning plate (151) is fixedly connected to one end of the turning column (156) away from the main shaft (43), the inner column (155) is fixedly connected to the rear side of the turning plate (151), and the inner plate (154) is fixedly connected to one end of the inner column (155) away from the turning plate (151).

5. A stirring tank for producing melamine cyanurate flame retardant according to claim 4, characterized in that: The outer side surface of the sliding ring (35) is hingedly connected to a support leg (7), the inner side surface of the support leg (7) is fixedly connected to a rotating plate (8), the lower side surface of the rotating plate (8) is fixedly connected to a hydraulic box (16), the left side surface of the support leg (7) is fixedly connected to a base plate (10), the upper side surface of the base plate (10) is slidably connected to an inclined plate (9), the upper side surface of the base plate (10) is fixedly connected to a hinge seat (11), the right side surface of the hinge seat (11) is fixedly connected to a hydraulic rod (12), the upper side surface of the inclined plate (9) is fixedly connected to a spring seat (13), the inner wall of the spring seat (13) is slidably connected to a spring block (14), the outer side surface of the sliding ring (35) is fixedly connected to a long plate (6), and the front side surface of the support leg (7) is rotatably connected to a small shaft (5).

6. A stirring tank for producing melamine cyanurate flame retardant according to claim 5, characterized in that: The small shaft (5) is provided at two locations, the small shaft (5) passes through the support leg (7) and the sliding ring (35), the long plate (6) is provided at two locations, the support leg (7) is provided at two locations, a spring is provided inside the spring seat (13), and the upper and lower ends of the spring are respectively fixedly connected to the spring seat (13) and the spring block (14).

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