Corrosion-resistant windproof dust suppression net

Abstract

The utility model relates to the technical field of wind prevention and dust suppression, discloses a corrosion-resistant wind prevention and dust suppression net, and solves the problems that the surface of the dust suppression net is blocked due to the fact that the wind power around the installation of a device is generally larger, and the dust suppression net cannot be cleaned in time if household garbage is easy to fly to the surface of the dust suppression net. The household garbage dust suppression device comprises a transmission device, the dust suppression net is installed at the lower end of the transmission device, the transmission device comprises a shell, a transmission assembly is installed in the shell, and the transmission assembly is connected with the transmission device. Springing assemblies are mounted on the two sides of the shell, rotating paddles are blown by outdoor strong wind to rotate, the rotating paddles drive incomplete gears at the lower ends to rotate, two connecting rods are driven to rotate through first connecting columns, two trapezoidal blocks are extruded by oval blocks to move towards the outer side of the shell, and the springing assemblies are pushed to knock a dust suppression net.

Description

Technical Field

[0001] This utility model relates to the field of windbreak and dust suppression technology, specifically a corrosion-resistant windbreak and dust suppression net. Background Technology

[0002] Windbreak and dust suppression nets utilize aerodynamic principles, processed according to wind tunnel experiments of the implementation site environment, into windbreak and dust suppression walls with specific geometric shapes, opening ratios, and combinations of different hole shapes. This causes the flowing air (strong wind) to pass through the wall from the outside, creating upward and downward interfering airflows on the inner side of the wall, achieving the effect of strong wind on the outside, weak wind on the inside, light wind on the outside, and no wind on the inside, thus preventing dust from flying. This product is made of metal raw materials through mechanical combination mold punching, pressing, and powder coating, possessing excellent properties such as high strength, good toughness, bending resistance, aging resistance, flame retardancy, high and low temperature resistance, acid and alkali resistance, and strong resistance to bending deformation. Manufactured with a special formula and process, it can be made in various thicknesses and colors according to user needs, featuring long service life, bright colors that are not easy to fade, and excellent overall dust suppression effect, superior to similar products at home and abroad. Windbreak and dust suppression nets are not only aesthetically pleasing and have low maintenance costs, but also have advantages such as fire resistance and theft prevention; they completely avoid the problems of repeated investment, huge costs, and limitations imposed by site and operational requirements, as well as poor dust suppression effects, associated with previous surface covering, spraying technology, and fully enclosed measures. This technology is low-cost, flexible in its setup, and easy to install. A one-time investment yields long-term benefits. The installation of windbreak and dust suppression walls not only effectively improves the environment in heavily polluted areas, but also saves coal yards thousands of tons of coal annually. It achieves both significant social and economic benefits, and the aesthetically pleasing and tidy windbreak and dust suppression walls have become a pleasant feature of these areas.

[0003] A Chinese patent with publication number CN214883550U discloses a high-strength, corrosion-resistant windbreak and dust suppression net. After laying the net on a barren slope or mound, the end of the sliding steel wire without hooks is pulled out from the sponge pad and then inserted into the slope or mound. This prevents the net from being blown away by the wind. Due to the dust-absorbing effect of the sponge pad, dust from the slope or mound is reduced, and the sponge pad also absorbs airborne dust. The sponge pad is also absorbent, absorbing rainwater to meet the growth needs of vegetation on the slope or mound. The strength of the fiber net is improved by the connection of the steel wire ring and the second hook, as well as the fixation of the sliding steel wire. During the laying of the high-strength, corrosion-resistant windbreak and dust suppression net, the second hooks are distributed along the uphill or downhill slope.

[0004] In the existing technology, since the wind force around the installation of the device is generally large, some domestic garbage can easily drift onto the surface of the dust suppression net, causing blockage of the dust suppression net surface. If it is not cleaned in time, the domestic garbage will increase the wind resistance of the dust suppression net, which will greatly affect the ventilation effect of the dust suppression net and easily cause damage to the rigid structure of the dust suppression net, thus greatly affecting the practicality of the device. Utility Model Content

[0005] The purpose of this invention is to provide a corrosion-resistant windbreak and dust suppression net. By using this device, the problem is solved: due to the generally strong winds around the installation site, some household garbage easily blows onto the surface of the dust suppression net, causing blockage. If this garbage is not cleaned in time, it will increase the wind resistance of the dust suppression net, greatly affecting the ventilation effect and easily causing damage to the rigid structure of the dust suppression net.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant windbreak and dust suppression net, comprising a transmission device, with a dust suppression net installed at the lower end of the transmission device. The transmission device includes a housing, with a transmission assembly installed inside the housing. Elastic components are installed on both sides of the housing. The transmission assembly includes a rotating paddle, with a rotating shaft fixedly installed at the lower end of the rotating paddle. The rotating shaft passes through the upper end of the housing and is rotatably connected to it. An incomplete gear, a half-gear, is fixedly installed at the lower end of the rotating shaft. Two sets of rotating gears are meshed on the outer side of the incomplete gear. A connecting column is installed through the rotating gear, rotatably connecting the rotating gears. A connecting block is rotatably installed at the lower end of the rotating gear, with its lower end fixedly connected to the housing. Connecting rods are fixedly installed at both ends of the connecting column. A connecting column two is rotatably installed at the end of the two connecting rods away from the rotating gear. An elliptical block is fixedly installed on the outer side of the connecting column two, with a connecting block two fixedly installed at the lower end of the elliptical block. The lower end of the connecting block two is slidably connected to the housing. Two trapezoidal blocks are slidably installed on both sides of the elliptical block. An elastic component is fixedly installed at the end of the elliptical block away from the rotating gear. The end of the elastic component away from the elliptical block is fixedly connected to the outer shell. The elliptical block squeezes the two sets of trapezoidal blocks to move outward from the outer shell, pushing the elastic component to strike the dust suppression net. The rotating paddle is rotated by strong outdoor wind. The rotating paddle drives the lower incomplete gear to rotate. When the incomplete gear drives the rotating gear on one side to rotate, the rotating gear drives the two connecting rods to rotate through the connecting column. The two connecting rods drive the elliptical block to slide in the direction of the rotating paddle inside the outer shell. The elliptical block squeezes the two sets of trapezoidal blocks to move outward from the outer shell, pushing the elastic component to strike the dust suppression net. Since the incomplete gear is a half gear, after the rotating gear rotates half a turn, the elastic component pulls the elliptical block to reset, which in turn pulls the connecting rod, causing the rotating gear to reset. The two sets of trapezoidal blocks reset at the same time. The incomplete gear turns to the other side, driving the other set of elastic components to strike the dust suppression net, thus realizing reciprocating cyclic striking, which causes less damage to the rigid structure of the dust suppression net.

[0007] Preferably, the upper end of the outer shell is provided with a round hole that matches the rotating shaft. Two sets of square holes are provided on both sides of the outer shell that match the trapezoidal blocks. The elliptical blocks slide back and forth in the square holes by squeezing the two sets of trapezoidal blocks, thereby repeatedly pushing the elastic component and reducing the amount of domestic waste adhering to the dust suppression net.

[0008] Preferably, the lower end of the inner shell is provided with a sliding groove, which matches the connecting block 2. The two connecting rods drive the elliptical block to slide through the sliding groove inside the shell, thereby compressing the two sets of trapezoidal blocks.

[0009] Preferably, the elastic component includes a connecting shell, inside which multiple sets of elastic elements are installed. One end of each elastic element is fixedly connected to the connecting shell, and the other end of each elastic element is fixedly installed with a push plate. The push plate is slidably connected to the connecting shell. A connecting block is fixedly installed at the end of the push plate away from the elastic elements, and the end of the connecting block away from the push plate is fixedly connected to an elliptical block. After the rotating gear rotates half a turn, the elliptical block slides along the groove under the action of the connecting rod, pulling the push plate to move in the direction of the rotating paddle. When the rotating gear rotates to the other side, the contraction of the elastic elements causes the push plate to move in the opposite direction of the rotating paddle, so that the elliptical block is reset, thereby resetting the two sets of trapezoidal blocks.

[0010] Preferably, a connecting block four is fixedly installed at the end of each of the two sets of trapezoidal blocks near the rotating gear, and an elastic element two is fixedly installed on the opposite side of the connecting block four. After the elliptical block moves in the opposite direction of the rotating paddle, the two sets of trapezoidal blocks are reset to the opposite side by the contraction of the elastic element two. When the elliptical block moves in the direction of the rotating paddle, the two sets of trapezoidal blocks push the elastic component by sliding in the square hole, so that it knocks the dust suppression net.

[0011] Preferably, the elastic component includes an L-shaped connecting rod, with a striking block fixedly installed at the lower end of the L-shaped connecting rod. An elastic element three is fixedly installed on the side of the L-shaped connecting rod near the trapezoidal block, and the other end of the elastic element three is fixedly connected to the outer shell. A support block is rotatably installed on the side of the L-shaped connecting rod near the trapezoidal block, and the end of the support block away from the L-shaped connecting rod is fixedly connected to the outer shell. When the two sets of trapezoidal blocks slide in the square hole to push the L-shaped connecting rod, causing it to rotate around the support block as the axis, the dust suppression net is struck by the striking block. After the two sets of trapezoidal blocks reset to their opposite sides, the L-shaped connecting rod resets under the contraction force of the elastic element three, waiting for the next strike.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention proposes a corrosion-resistant windbreak and dust suppression net. It utilizes a rotating paddle driven by strong outdoor winds to rotate. The paddle drives a partially rotating gear at the lower end. When the partially rotating gear drives a rotating gear on one side, the rotating gear, through a connecting column, drives two connecting rods to rotate. These connecting rods cause an elliptical block to slide within the outer shell along the direction of the rotating paddle. The elliptical block compresses two sets of trapezoidal blocks, causing them to move outwards from the outer shell and push a spring-loaded component to strike the dust suppression net. Since the partially rotating gear is a half-gear, after the rotating gear rotates half a turn, the elastic component pulls the elliptical block back to its original position, which in turn pulls the connecting rod, causing the rotating gear to reset. Both sets of trapezoidal blocks reset simultaneously. The partially rotating gear then turns to the other side, driving another set of elastic components to strike the dust suppression net, thus achieving a reciprocating cyclic striking effect with minimal damage to the rigid structure of the dust suppression net. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the transmission device structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the outer shell structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the transmission component structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the transmission component structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the elastic component structure of this utility model;

[0020] Figure 7 This is a schematic diagram of the planar structure of the elastic component of this utility model;

[0021] Figure 8 Figure A is an enlarged structural schematic diagram of this utility model.

[0022] In the diagram: 1. Transmission device; 11. Housing; 111. Round hole; 112. Square hole; 113. Slide groove; 12. Transmission assembly; 121. Rotating paddle; 122. Rotating shaft; 123. Incomplete gear; 124. Rotating gear; 1241. Connecting column one; 1242. Connecting block one; 125. Connecting rod; 126. Elliptical block; 1261. Connecting column two; 1262. Connecting block two; 127. Elastic assembly; 1271. Connecting shell; 1272. Elastic element one; 1273. Push plate; 1274. Connecting block three; 128. Trapezoidal block; 1281. Connecting block four; 1282. Elastic element two; 13. Springing assembly; 131. L-shaped connecting rod; 132. Striking block; 133. Elastic element three; 134. Support block; 2. Dust suppression net. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0025] Combination Figure 1-2 , Figure 4-6 A corrosion-resistant windbreak and dust suppression net includes a transmission device 1. A dust suppression net 2 is installed at the lower end of the transmission device 1. The transmission device 1 includes a housing 11, and a transmission assembly 12 is installed inside the housing 11. Elastic components 13 are installed on both sides of the housing 11. The transmission assembly 12 includes a rotating paddle 121. A rotating shaft 122 is fixedly installed at the lower end of the rotating paddle 121. The rotating shaft 122 passes through the upper end of the housing 11 and is rotatably connected thereto. An incomplete gear 123 is fixedly installed at the lower end of the rotating shaft 122. The incomplete gear 123 is a half-gear. Two sets of rotating gears 124 are meshed on the outer side of the incomplete gear 123. The interior of the rotating gears 124... A connecting post 1241 is installed, and a rotating gear 124 is rotatably connected to the rotating gear 124. A connecting block 1242 is rotatably installed at the lower end of the rotating gear 124, and the lower end of the connecting block 1242 is fixedly connected to the outer shell 11. Connecting rods 125 are fixedly installed at both the upper and lower ends of the connecting post 1241. A connecting post 2261 is rotatably installed at the end of the two connecting rods 125 away from the rotating gear 124. An elliptical block 126 is fixedly installed on the outer side of the connecting post 2261. A connecting block 2262 is fixedly installed at the lower end of the elliptical block 126, and the lower end of the connecting block 2262 is slidably connected to the outer shell 11. Slidably installed on both sides of the elliptical block 126 are... Two trapezoidal blocks 128 and an elliptical block 126 are fixedly mounted with an elastic component 127 at the end away from the rotating gear 124. The end of the elastic component 127 away from the elliptical block 126 is fixedly connected to the outer shell 11. The elliptical block 126 squeezes the two sets of trapezoidal blocks 128 to move outward from the outer shell 11, pushing the elastic component 13 to strike the dust suppression net 2. The rotating paddle 121 is rotated by the strong outdoor wind. The rotating paddle 121 drives the lower incomplete gear 123 to rotate. When the incomplete gear 123 drives the rotating gear 124 on one side to rotate, the rotating gear 124 drives the two connecting rods 125 to rotate through the connecting column 1241. The two connecting rods 125 drive... The movable elliptical block 126 slides inside the outer shell 11 along the direction of the rotating paddle 121. The elliptical block 126 squeezes the two sets of trapezoidal blocks 128 to move outward from the outer shell 11, pushing the elastic component 13 to strike the dust suppression net 2. Since the incomplete gear 123 is a half gear, after the rotating gear 124 rotates half a turn, the elastic component 127 pulls the elliptical block 126 to reset, which in turn pulls the connecting rod 125, causing the rotating gear 124 to reset. The two sets of trapezoidal blocks 128 reset at the same time. The incomplete gear 123 turns to the other side, driving the other set of elastic components 127 to strike the dust suppression net 2, thus realizing reciprocating cyclic striking, which causes less damage to the rigid structure of the dust suppression net 2.

[0026] Combination Figure 2-4A corrosion-resistant windbreak and dust suppression net has a round hole 111 at the upper end of the outer shell 11, which matches the rotating shaft 122. Two sets of square holes 112 are provided on both sides of the outer shell 11, which match the trapezoidal blocks 128. The elliptical block 126 slides back and forth in the square hole 112 by squeezing the two sets of trapezoidal blocks 128, thereby repeatedly pushing the elastic component 127 to reduce the adhesion of domestic waste to the dust suppression net 2.

[0027] Combination Figure 2-3 , Figure 6 A corrosion-resistant windproof and dust-suppressing net has a groove 113 at the lower end of the inner shell 11. The groove 113 matches the connecting block 1262. Two connecting rods 125 drive the elliptical block 126 to slide through the groove 113 inside the shell 11, thus compressing the two sets of trapezoidal blocks 128.

[0028] Combination Figure 4 , Figure 6 A corrosion-resistant windbreak and dust suppression net includes an elastic component 127 comprising a connecting shell 1271. Multiple sets of elastic elements 1272 are installed inside the connecting shell 1271. One end of each elastic element 1272 is fixedly connected to the connecting shell 1271, and a pusher plate 1273 is fixedly installed at the other end of each elastic element 1272. The pusher plate 1273 is slidably connected to the connecting shell 1271. A connecting block 1274 is fixedly installed at the end of the pusher plate 1273 away from the elastic elements 1272. One end of the moving plate 1273 is fixedly connected to the elliptical block 126. After the rotating gear 124 rotates half a turn, the elliptical block 126 slides along the slide groove 113 under the action of the connecting rod 125, pulling the push plate 1273 to move along the direction of the rotating paddle 121. When the rotating gear 124 rotates to the other side, the elastic element 1272 contracts and drives the push plate 1273 to move in the opposite direction of the rotating paddle 121, so that the elliptical block 126 is reset, thereby resetting the two sets of trapezoidal blocks 128.

[0029] Combination Figure 4-5 A corrosion-resistant windbreak and dust suppression net is provided. Two sets of trapezoidal blocks 128 are fixedly installed with connecting blocks 1281 at one end near the rotating gear 124. Elastic elements 1282 are fixedly installed on the opposite side of the connecting blocks 1281. After the elliptical block 126 moves in the opposite direction of the rotating paddle 121, the two sets of trapezoidal blocks 128 are reset to the opposite side by the contraction of the elastic elements 1282. When the elliptical block 126 moves in the direction of the rotating paddle 121, the two sets of trapezoidal blocks 128 push the elastic component 13 by sliding in the square hole 112, so that it knocks the dust suppression net 2.

[0030] Combination Figure 2-4 , Figure 7-8A corrosion-resistant windbreak and dust suppression net, the elastic component 13 includes an L-shaped connecting rod 131, a striking block 132 fixedly installed at the lower end of the L-shaped connecting rod 131, an elastic element 133 fixedly installed on the side of the L-shaped connecting rod 131 near the trapezoidal block 128, the other end of the elastic element 133 fixedly connected to the outer shell 11, a support block 134 rotatably installed on the side of the L-shaped connecting rod 131 near the trapezoidal block 128, the end of the support block 134 away from the L-shaped connecting rod 131 fixedly connected to the outer shell 11. When the two sets of trapezoidal blocks 128 slide in the square hole 112 to push the L-shaped connecting rod 131, causing it to rotate around the support block 134 as the axis, the dust suppression net 2 is struck by the striking block 132. After the two sets of trapezoidal blocks 128 reset to the opposite side, the L-shaped connecting rod 131 resets under the contraction force of the elastic element 133, waiting for the next strike.

[0031] Working principle: When strong outdoor winds act on the rotating paddle 121 of the transmission device 1, the rotating paddle 121 begins to rotate and drives the rotating shaft 122 at its lower end to rotate. The incomplete gear 123 at the lower end of the rotating shaft 122 rotates accordingly. The incomplete gear 123 meshes with the rotating gear 124. Since the incomplete gear 123 is a special half-gear structure, when it rotates, it will intermittently drive two sets of rotating gears 124. Taking one set of rotating gears 124 as an example, when the rotating gear 124 rotates, the connecting column 1241 passing through it rotates accordingly. The connecting rods 125 at the upper and lower ends of the connecting column 1241 move accordingly. The two connecting rods 125 drive the connecting column 1261 and the elliptical block 126 fixed on the outside to slide along the slide groove 113 towards the rotating paddle 121 inside the outer shell 11. During the sliding process, the elliptical block 126 squeezes the trapezoidal blocks 128 on both sides, so that the trapezoidal blocks 128 are in the outer shell 11. The square holes 112 on both sides slide outward. When the trapezoidal block 128 slides outward, it pushes the spring component 13. The L-shaped connecting rod 131 of the spring component 13 rotates around the support block 134, which drives the lower striking block 132 to strike the dust suppression net 2. When the incomplete gear 123 causes the rotating gear 124 to rotate half a turn, the elastic component 127 begins to play its role. The elastic element 1272 of the elastic component 127 pulls the push plate 1273. The push plate 1273 drives the elliptical block 126 to reset through the connecting block 3 1274. The reset of the elliptical block 126 pulls the connecting rod 125, which resets the rotating gear 124. At the same time, the trapezoidal block 128 resets under the contraction of the elastic element 2 1282. The incomplete gear 123 turns to the other side and repeats the above action, driving another set of rotating gears 124 and other related components to achieve reciprocating cyclic knocking on the dust suppression net 2, thereby reducing the amount of domestic waste attached to the dust suppression net 2, and this knocking method causes less damage to the rigid structure of the dust suppression net 2.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-corrosion windproof dust suppression net, comprising a transmission device (1), a dust suppression net (2) is installed at the lower end of the transmission device (1), the transmission device (1) comprises a shell (11), a transmission assembly (12) is installed inside the shell (11), elastic assemblies (13) are installed on both sides of the shell (11), characterized in that: The transmission assembly (12) comprises a rotating shaft (122), the lower end of the rotating shaft (122) is fixedly installed with an incomplete gear (123), the incomplete gear (123) is a one-half gear, the outer side of the incomplete gear (123) is meshedly installed with two groups of rotating gears (124), the inside of the rotating gear (124) is penetratively installed with a connecting column I (1241), the rotating gear (124) is rotatably connected with the rotating gear (124), the lower end of the rotating gear (124) is rotatably installed with a connecting block I (1242), the lower end of the connecting block I (1242) is fixedly connected with the shell (11), the upper and lower ends of the connecting column I (1241) are fixedly installed with connecting rods (125), the ends, away from the rotating gear (124), of the two connecting rods (125) are rotatably installed with a connecting column II (1261), the outer side of the connecting column II (1261) is fixedly installed with an oval block (126), the lower end of the oval block (126) is fixedly installed with a connecting block II (1262), the lower end of the connecting block II (1262) is slidably connected with the shell (11), the two sides of the oval block (126) are slidably installed with two trapezoidal blocks (128), the end, away from the rotating gear (124), of the oval block (126) is fixedly installed with an elastic assembly (127), the end, away from the oval block (126), of the elastic assembly (127) is fixedly connected with the shell (11), the oval block (126) extrudes the two groups of trapezoidal blocks (128) to move to the outer side of the shell (11), and the elastic assembly (13) is pushed to knock the dust suppression net (2).

2. The corrosion-resistant wind-preventing dust-suppressing net according to claim 1, characterized in that: The upper end of the shell (11) is provided with a circular hole (111), the circular hole (111) is matched with the rotating shaft (122), and the two sides of the shell (11) are provided with two groups of square holes (112), the square holes (112) are matched with the trapezoidal blocks (128).

3. The corrosion-resistant wind-preventing dust-suppressing net according to claim 2, characterized in that: The lower end of the shell (11) is provided with a sliding groove (113) in the inside, and the sliding groove (113) is matched with the connecting block II (1262).

4. The corrosion-resistant wind-preventing dust-suppressing net according to claim 1, characterized in that: The elastic assembly (127) comprises a connecting shell (1271), a plurality of elastic members I (1272) are installed in the inside of the connecting shell (1271), one end of the elastic member I (1272) is fixedly connected with the connecting shell (1271), the other end of the elastic member I (1272) is fixedly installed with a pushing plate (1273), the pushing plate (1273) is slidably connected with the connecting shell (1271), the end, away from the elastic member I (1272), of the pushing plate (1273) is fixedly installed with a connecting block III (1274), and the end, away from the pushing plate (1273), of the connecting block III (1274) is fixedly connected with the oval block (126).

5. The corrosion-resistant wind-preventing dust-suppressing net according to claim 1, characterized in that: The end, close to the rotating gear (124), of the two groups of trapezoidal blocks (128) is fixedly installed with a connecting block IV (1281), and the opposite side of the connecting block IV (1281) is fixedly installed with an elastic member II (1282).

6. The corrosion-resistant wind-preventing dust-suppressing net according to claim 3, characterized in that: The elastic assembly (13) comprises an L-shaped connecting rod (131), a knocking block (132) is fixedly installed at the lower end of the L-shaped connecting rod (131), an elastic piece three (133) is fixedly installed on one side of the L-shaped connecting rod (131) close to the trapezoidal block (128), one end of the elastic piece three (133) is fixedly connected with the shell (11), and a supporting block (134) is rotatably installed on one side of the L-shaped connecting rod (131) close to the trapezoidal block (128), and one end of the supporting block (134) away from the L-shaped connecting rod (131) is fixedly connected with the shell (11).

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