A multi-stage combined atmosphere purification device

Abstract

The present invention relates to the technical field of dust removal equipment, and proposes a multi-stage combined air purification equipment, including a protective plate, the bottom of which is provided with a universal wheel, the top of which is provided with a water tank, the top of which is provided with a supporting leg, the top of which is fixedly connected with a fixing plate, and the top of which is provided with a dust removal device; the dust removal device includes a motor, the motor is provided at the top of the protective plate, the output shaft of the motor is fixedly connected with a rotating rod, the top of the rotating rod is fixedly connected with a storage box, and the top of the storage box is fixedly penetrated with a nozzle rod. Through the above technical scheme, the problems in the prior art that it is difficult to achieve the effect of cleaning the nozzle, it is difficult to prevent the nozzle from being blocked, it is difficult to ensure that the nozzle will not be blocked by dust or sediment, it is difficult to avoid the operation interruption of the equipment due to the nozzle blockage, and the dust removal effect is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal equipment, and in particular to a multi-stage combined atmosphere purification equipment. Background Art

[0002] Air refers to the mixture of gases in the earth's atmosphere. Compressed air is air compressed by external force. Air is compressible. Air that has been reduced in volume and increased in pressure by mechanical work done by an air compressor is called compressed air. Compressed air is an important source of power. Compared with other energy sources, it has the following obvious characteristics: clear and transparent, easy to transport, no special harmful properties, no fire hazard, not afraid of overload, and can work in many unfavorable environments. Purification equipment refers to products that can adsorb, decompose or transform various air pollution sources, air pollutants, indoor biological pollution, mainly including bacteria, fungi, mold, viruses, dust mites, pollen, pet dander, organic components of organisms, etc., and effectively improve the cleanliness of the air. At present, household and industrial purification equipment for removing indoor air pollution is the main one.

[0003] According to a disclosed wet dust removal device (publication number: CN105233651B), it includes a dust removal pool, a dust removal air inlet pipe and a dust removal exhaust pipe are inserted into the dust removal pool, a slag removal bucket is provided at the slag inlet below the dust removal pool, a screw is transversely arranged in the slag removal bucket, the end side of the screw corresponds to the slag inlet, the screw is processed with threads, dust covers are installed at both ends of the screw, bearings are installed at the outer sides of the dust covers at both ends of the screw, the ends of the bearings are equipped with retaining springs, and bearing end covers are provided at both ends of the slag removal bucket. The screw is connected to a motor through a coupling through the bearing end cover away from the slag inlet end. The rotation of the motor drives the screw to rotate relative to the slag removal barrel. A slag outlet is arranged at the lower end of the slag removal barrel near one end of the motor. The slag outlet is provided with a slag outlet pipe. However, in the above-mentioned device, components such as the dust removal air inlet pipe and the dust removal exhaust pipe cooperate with each other, and it is difficult to achieve the effect of cleaning the nozzle, prevent the nozzle from being blocked, ensure that the nozzle will not be blocked by dust or sediment, and avoid equipment operation interruption caused by nozzle blockage, which reduces the dust removal effect and needs to be improved. Summary of the invention

[0004] The invention provides a multi-stage combined atmosphere purification device.

[0005] The technical solution of the present invention is as follows: a multi-stage combined air purification device, comprising a protective plate, a universal wheel is arranged at the bottom of the protective plate, a water tank is arranged at the top of the protective plate, a supporting leg is arranged at the top of the protective plate, a fixing plate is fixedly connected to the top of the supporting leg, and a dust removal device is arranged at the top of the protective plate;

[0006] The dust removal device includes a motor, which is arranged on the top of the protective plate, the output shaft of the motor is fixedly connected to a rotating rod, the top of the rotating rod is fixedly connected to a storage box, the top of the storage box is fixedly penetrated by a nozzle, the top of the nozzle is provided with a slide groove, the inner wall of the slide groove is slidably connected to a sliding block, the inner wall of the slide groove is provided with a hydraulic cylinder, one end of the hydraulic cylinder is slidably connected to a force rod through a piston, the other end of the hydraulic cylinder is slidably connected to a hydraulic rod through a piston, the end of the hydraulic rod away from the hydraulic cylinder is fixedly connected to a fixed block, the side of the fixed block is fixedly connected to a cleaning brush, and the side of the fixed block is slidably connected to the circumferential surface of the nozzle.

[0007] A spring is fixedly connected to the side surface of the hydraulic cylinder, and one end of the spring away from the hydraulic cylinder is fixedly connected to the circumferential surface of the force-bearing rod.

[0008] The initial state of the spring is a relaxed state, and the number of the cleaning brushes is set to be a plurality and arranged in a circumferential array on the circumferential surface of the nozzle.

[0009] A filtering device is arranged on the top of the protective plate, and the filtering device includes a gear plate, and the gear plate is fixedly connected to the inner wall of the storage box; the top of the fixed plate is rotatably connected to a rotating shaft, and the circumferential surface of the rotating shaft is fixedly connected to a rotating gear; the top of the fixed plate is rotatably connected to a rotating rod, and the circumferential surface of the rotating rod is fixedly connected to a gear, and the circumferential surface of the rotating shaft is fixedly connected to a filter plate.

[0010] The side surface of the gear meshes with the inner wall of the gear plate, and the side surface of the rotating gear meshes with the side surface of the gear.

[0011] The number of the gears is set to be a plurality and they are arranged in a circumferential array on the inner wall of the gear plate; the number of the filter plates is set to be a plurality and they are arranged in a circumferential array on the circumferential surface of the rotating shaft.

[0012] The top of the protective plate is provided with an adjusting device, and the adjusting device includes a belt, which is rotatably connected to the circumferential surface of the rotating rod, and one end of the belt away from the rotating rod is rotatably connected to the connecting rod, and the circumferential surface of the connecting rod is provided with a slot, and the bottom of the connecting rod is provided with a positioning rod, and the circumferential surface of the positioning rod is fixedly connected to the helical gear, the side of the protective plate passes through a reciprocating screw rod, the circumferential surface of the reciprocating screw rod is fixedly connected to the bevel gear, the circumferential surface of the reciprocating screw rod is threadedly connected to a threaded block, and the side of the other protective plate is fixedly connected to a mounting plate, and the side of the threaded block is fixedly connected to a support rod, and one end of the support rod away from the threaded block is fixedly connected to the positioning block, the side of the protective plate is fixedly connected to the fixing rod, and the side of the positioning block is rotatably connected to a rotating shaft, and the end of the rotating shaft away from the positioning block is rotatably connected to the mounting block.

[0013] The bottom of the threaded block is slidably connected to the top of the protective plate, the positioning rod passes through the top of the mounting plate, the circumferential surface of the fixing rod is slidably connected to the side of the positioning block, the top of the protective plate is fixedly connected to the positioning plate, and the side of the positioning plate is rotatably connected to one end of the reciprocating screw.

[0014] The bottom of another protective plate is fixedly connected to the top of the mounting block, and one end of another rotating shaft is rotatably connected to the side of the protective plate.

[0015] The side surface of the helical gear meshes with the side surface of the bevel gear. The number of the fixing rods is set to two and they are symmetrical to each other along the vertical center axis of the protective plate. The circumferential surface of the connecting rod is provided with balls.

[0016] The working principle and beneficial effects of the present invention are:

[0017] The present invention uses a motor to drive the rotating rod to rotate, and cooperates with components such as the hydraulic rod, hydraulic cylinder and force-bearing rod in the dust removal device, so that when the dust removal is completed, the motor stops rotating, the slider is reset, and the force-bearing rod is reset by the elastic force of the spring, so that the hydraulic rod drives the fixed block and the cleaning brush to reset, thereby achieving the effect of cleaning the nozzle and preventing the nozzle from being blocked. The cleaning brush is located at the water outlet of the nozzle and can also prevent the nozzle from being blocked by dust when the equipment is not working, ensuring that the nozzle will not be blocked by dust or sediment, thereby avoiding the operation interruption of the equipment due to nozzle blockage and increasing the dust removal effect.

[0018] In the present invention, the force of the gear plate driven by the rotation of the storage box cooperates with the rotating shaft, gear plate, rotating gear and other components in the filter device to achieve the reverse rotation of the filter plate and the storage box, thereby achieving the effect of filtering the water inside the storage box and preventing impurities in the water from clogging the nozzle. By filtering the water in the storage box, impurities in the water can be effectively removed to prevent these impurities from entering the nozzle, thereby preventing the nozzle from being blocked and causing the spraying effect to decrease or stop working.

[0019] In the present invention, the force of the positioning rod driven by the rotation of the connecting rod cooperates with the mounting plate, helical gear, bevel gear and other components in the adjusting device, and realizes the rotation of the rotating shaft by the displacement of the positioning block, so that the top of the rotating shaft drives the mounting block to move upward, thereby achieving the effect of increasing the dust removal range by moving the nozzle up and down, thereby increasing the dust removal effect, and by increasing the height adjustment range of the nozzle, it can cover a larger area and improve the dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the present invention;

[0022] Figure 2 It is a schematic diagram of a three-dimensional half-section structure of a gear of the present invention;

[0023] Figure 3 It is a three-dimensional side view structural schematic diagram of the cleaning brush of the present invention;

[0024] Figure 4 It is a three-dimensional side view structural schematic diagram of the chute of the present invention;

[0025] Figure 5 It is a three-dimensional enlarged structural schematic diagram of the gear of the present invention;

[0026] Figure 6 It is a three-dimensional enlarged structural schematic diagram of the gear plate of the present invention;

[0027] Figure 7 It is a three-dimensional side view structural schematic diagram of the motor of the present invention;

[0028] Figure 8 It is a three-dimensional side view structural schematic diagram of the thread block of the present invention;

[0029] Fig. 9 It is a three-dimensional enlarged structural schematic diagram of the ball of the present invention.

[0030] In the figure: 101, protective plate; 102, universal wheel; 103, water tank; 104, support leg; 105, fixed plate; 2, dust removal device; 201, motor; 202, storage box; 203, nozzle; 204, slide; 205, slider; 206, hydraulic cylinder; 207, force rod; 208, spring; 209, hydraulic rod; 210, fixed block; 211, cleaning brush; 212, rotating rod; 3, filtering device; 301, gear plate; 302, rotating rod; 3 03, gear; 304, rotating shaft; 305, rotating gear; 306, filter plate; 4, adjusting device; 401, belt; 402, connecting rod; 403, slot; 404, positioning rod; 406, mounting plate; 407, bevel gear; 408, reciprocating screw; 409, bevel gear; 410, threaded block; 411, positioning plate; 412, support rod; 413, positioning block; 414, fixing rod; 415, rotating shaft; 416, mounting block; 417, ball bearing. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0032] like Figure 1 to Figure 9As shown, this embodiment proposes a multi-stage combined air purification device, including a protective plate 101, a universal wheel 102 is arranged at the bottom of the protective plate 101, a water tank 103 is arranged at the top of the protective plate 101, a support leg 104 is arranged at the top of the protective plate 101, a fixed plate 105 is fixedly connected to the top of the support leg 104, and a dust removal device 2 is arranged at the top of the protective plate 101; the dust removal device 2 includes a motor 201, the motor 201 is arranged at the top of the protective plate 101, the output shaft of the motor 201 is fixedly connected to a rotating rod 212, and the top of the rotating rod 212 is fixedly connected to a storage box 202 The top of the storage box 202 is fixedly penetrated by a nozzle 203, a slide groove 204 is provided on the top of the nozzle 203, a slider 205 is slidably connected to the inner wall of the slide groove 204, a hydraulic cylinder 206 is provided on the inner wall of the slide groove 204, one end of the hydraulic cylinder 206 is slidably connected to a force rod 207 through a piston, the other end of the hydraulic cylinder 206 is slidably connected to a hydraulic rod 209 through a piston, the end of the hydraulic rod 209 away from the hydraulic cylinder 206 is fixedly connected to a fixed block 210, the side of the fixed block 210 is fixedly connected to a cleaning brush 211, and the side of the fixed block 210 is slidably connected to the circumferential surface of the nozzle 203. A spring 208 is fixedly connected to the side of the hydraulic cylinder 206, and the end of the spring 208 away from the hydraulic cylinder 206 is fixedly connected to the circumferential surface of the force rod 207. The initial state of the spring 208 is a relaxed state, and the number of cleaning brushes 211 is set to be a plurality, and they are arrayed on the circumferential surface of the nozzle 203 along the circumference. The top of the protection plate 101 is provided with a filter device 3, which includes a gear plate 301, which is fixedly connected to the inner wall of the storage box 202, a rotating shaft 304 is rotatably connected to the top of the fixed plate 105, a rotating gear 305 is fixedly connected to the circumferential surface of the rotating shaft 304, a rotating rod 302 is rotatably connected to the top of the fixed plate 105, a gear 303 is fixedly connected to the circumferential surface of the rotating rod 302, and a filter plate 306 is fixedly connected to the circumferential surface of the rotating shaft 304. The side surface of the gear 303 meshes with the inner wall of the gear plate 301, and the side surface of the rotating gear 305 meshes with the side surface of the gear 303. The number of gears 303 is set to be a plurality and they are arranged in a circular array on the inner wall of the gear plate 301; the number of filter plates 306 is set to be a plurality and they are arranged in a circular array on the circumferential surface of the rotating shaft 304. By filtering the water in the storage tank 202, impurities in the water can be effectively removed to prevent these impurities from entering the nozzle 203, and to prevent the nozzle 203 from being blocked and causing the spraying effect to decrease or stop working. Clean water can ensure the uniformity of spraying by the nozzle 203, thereby improving the effect of wet dust removal and more effectively capturing dust and pollutants in the air. The reverse rotation of the filter plate 306 can more thoroughly remove impurities in the water and ensure that the filtering effect is optimal, thereby improving the overall performance of the equipment. Effective filtering of impurities in the water reduces the risk of equipment blockage and avoids overpressure, leakage or other safety hazards that may be caused by equipment blockage.

[0033] In this embodiment, the present application drives the rotating rod 212 to rotate through the motor 201, and then drives the storage box 202 to rotate through the rotation of the rotating rod 212, and drives the nozzle 203 to rotate through the rotation of the storage box 202, so that the nozzle 203 rotates to perform wet dust removal. When the nozzle 203 rotates, the slider 205 is displaced outward by the action of centrifugal force, so that the slider 205 squeezes the force rod 207, and the force rod 207 is displaced inward to squeeze the piston inside the hydraulic cylinder 206. The piston inside the hydraulic cylinder 206 pushes the liquid inside it, and the liquid inside the hydraulic cylinder 206 pushes another piston to move, and the piston The hydraulic rod 209 is pushed to move, and then the fixed block 210 is pushed to move by the hydraulic rod 209. The cleaning brush 211 is moved by the displacement of the fixed block 210, so that the cleaning brush 211 is away from the water outlet of the nozzle 203. When the dust removal is completed, the motor 201 stops rotating, the slider 205 is reset, and the force-bearing rod 207 is reset by the elastic force of the spring 208, so that the hydraulic rod 209 drives the fixed block 210 and the cleaning brush 211 to reset, thereby cleaning the nozzle 203 and preventing the nozzle 203 from being blocked. The cleaning brush 211 is located at the water outlet of the nozzle 203 and can also prevent the nozzle 203 from being blocked by dust when the equipment is not working.

[0034] The storage box 202 rotates to drive the gear plate 301 to rotate, and then the gear plate 301 drives the gear 303 to rotate, and the gear 303 drives the rotating gear 305 to rotate in the opposite direction, and then the rotating gear 305 drives the rotating shaft 304 to rotate, and the rotating shaft 304 drives the filter plate 306 to rotate, thereby achieving the effect of the filter plate 306 and the storage box 202 rotating in the opposite direction, achieving the effect of filtering the water inside the storage box 202, and preventing impurities in the water from clogging the nozzle 203. Example

[0035] like Figure 1 to Figure 9As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment also proposes a multi-stage combined air purification device, the top of the protective plate 101 is provided with an adjusting device 4, the adjusting device 4 includes a belt 401, the belt 401 is rotatably connected to the circumferential surface of the rotating rod 212, the end of the belt 401 away from the rotating rod 212 is rotatably connected to a connecting rod 402, the circumferential surface of the connecting rod 402 is provided with a card slot 403, the bottom of the connecting rod 402 is provided with a positioning rod 404, the circumferential surface of the positioning rod 404 is fixedly connected with a bevel gear 407, and the side of the protective plate 101 is penetrated with a reciprocating Screw 408, bevel gear 409 is fixedly connected to the circumferential surface of reciprocating screw 408, thread block 410 is threadedly connected to the circumferential surface of reciprocating screw 408, mounting plate 406 is fixedly connected to the side of another protective plate 101, support rod 412 is fixedly connected to the side of thread block 410, and a positioning block 413 is fixedly connected to the end of support rod 412 away from thread block 410, and a fixing rod 414 is fixedly connected to the side of protective plate 101, and a rotating shaft 415 is rotatably connected to the side of positioning block 413, and a mounting block 416 is rotatably connected to the end of rotating shaft 415 away from positioning block 413. The bottom of thread block 410 is slidably connected to the top of protective plate 101, positioning rod 404 runs through the top of mounting plate 406, the circumferential surface of fixing rod 414 is slidably connected to the side of positioning block 413, and a positioning plate 411 is fixedly connected to the top of protective plate 101, and the side of positioning plate 411 is rotatably connected to one end of reciprocating screw 408. The bottom of another protective plate 101 is fixedly connected to the top of the mounting block 416, and one end of another rotating shaft 415 is rotatably connected to the side of the protective plate 101. The side of the helical gear 407 meshes with the side of the bevel gear 409. The number of fixed rods 414 is set to two, and they are symmetrical to each other along the vertical center axis of the protective plate 101. The circumferential surface of the connecting rod 402 is provided with a ball 417. By increasing the height adjustment range of the nozzle 203, a larger area can be covered, and the dust removal efficiency is improved. The limit and sliding connection in the design ensure the stability and reliability of the equipment and reduce the risk of failure.

[0036] In this embodiment, when the device is placed in an open area, the positioning rod 404 is displaced upward so that the ball 417 on the circumferential surface of the connecting rod 402 is stuck in the groove of the positioning rod 404. At this time, the rotating rod 212 rotates to drive the belt 401 to rotate, and the belt 401 rotates to drive the connecting rod 402 to rotate, and the connecting rod 402 rotates to drive the positioning rod 404 to rotate, and the positioning rod 404 rotates to drive the bevel gear 407 to rotate, and the bevel gear 407 rotates to drive the bevel gear 409 to rotate, and the bevel gear 409 rotates to drive the reciprocating screw 408 to rotate, and the reciprocating screw 408 rotates to drive the threaded block 410 to move, and the screw The sliding connection between the pattern block 410 and the protective plate 101 will limit the threaded block 410. The displacement of the threaded block 410 drives the support rod 412 to move, and then the displacement of the support rod 412 drives the positioning block 413 to move along the fixed rod 414. The displacement of the positioning block 413 squeezes the rotating shaft 415 to rotate, so that the top of the rotating shaft 415 drives the mounting block 416 to move upward, thereby causing the nozzle 203 to move up and down to increase the dust removal range and improve the dust removal effect. When the equipment is located in a small space, press the ball 417 inward to disengage the ball 417 from the slot, and the connecting rod 402 is away from the positioning rod 404. At this time, the reciprocating screw 408 can be manually rotated to adjust the height of the nozzle 203.

[0037] 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 multi-stage combined atmosphere purification device, It is characterized in that Comprising a protection plate (101), a universal wheel (102) is arranged at the bottom of the protection plate (101), a water tank (103) is arranged at the top of the protection plate (101), a support leg (104) is arranged at the top of the protection plate (101), a fixing plate (105) is fixedly connected to the top of the support leg (104), and a dust removal device (2) is arranged at the top of the protection plate (101); The dust removal device (2) comprises a motor (201), the motor (201) being arranged on the top of the protective plate (101), the output shaft of the motor (201) being fixedly connected to a rotating rod (212), the top of the rotating rod (212) being fixedly connected to a storage box (202), the top of the storage box (202) being fixedly penetrated by a nozzle (203), the top of the nozzle (203) being provided with a slide groove (204), the inner wall of the slide groove (204) being slidably connected to a slider (205), the inner wall of the slide groove (204) being provided with a hydraulic cylinder (206), one end of the hydraulic cylinder (206) being slidably connected to a force bearing rod (207) via a piston, the other end of the hydraulic cylinder (206) being One end is slidably connected to a hydraulic rod (209) through a piston, the end of the hydraulic rod (209) away from the hydraulic cylinder (206) is fixedly connected to a fixed block (210), the side of the fixed block (210) is fixedly connected to a cleaning brush (211), the side of the fixed block (210) is slidably connected to the circumferential surface of the nozzle (203), the side of the hydraulic cylinder (206) is fixedly connected to a spring (208), the end of the spring (208) away from the hydraulic cylinder (206) is fixedly connected to the circumferential surface of the force-bearing rod (207), the initial state of the spring (208) is a relaxed state, and the number of the cleaning brushes (211) is set to be a plurality, and they are arranged in a circumferential array on the circumferential surface of the nozzle (203); When the spray head (203) rotates, the slider (205) is displaced outwards by the action of centrifugal force, so that the slider (205) squeezes the force-bearing rod (207), so that the force-bearing rod (207) is displaced inwards to squeeze the piston inside the hydraulic cylinder (206), the piston inside the hydraulic cylinder (206) pushes the liquid inside it, the liquid inside the hydraulic cylinder (206) pushes another piston to move, the piston pushes the hydraulic rod (209) to move, and then the hydraulic rod (209) pushes the fixed block (210) to move, and the cleaning brush (210) is driven by the displacement of the fixed block (210). The cleaning brush (211) is displaced so that the cleaning brush (211) is away from the water outlet of the nozzle (203). When dust removal is completed, the motor (201) stops rotating, the slider (205) is reset, and the force-bearing rod (207) is reset by the elastic force of the spring (208), so that the hydraulic rod (209) drives the fixing block (210) and the cleaning brush (211) to reset, thereby achieving the function of cleaning the nozzle (203) and preventing the nozzle (203) from being blocked. The cleaning brush (211) is located at the water outlet of the nozzle (203) and can also prevent the nozzle (203) from being blocked by dust when the device is not working.

2. A multi-stage combined atmosphere purification device according to claim 1, It is characterized in that A filter device (3) is provided on the top of the protection plate (101), and the filter device (3) comprises a gear plate (301), and the gear plate (301) is fixedly connected to the inner wall of the storage box (202); the top of the fixed plate (105) is rotatably connected to a rotating shaft (304), and the circumferential surface of the rotating shaft (304) is fixedly connected to a rotating gear (305); the top of the fixed plate (105) is rotatably connected to a rotating rod (302), and the circumferential surface of the rotating rod (302) is fixedly connected to The gear (303) is provided with a filter plate (306) fixedly connected to the circumferential surface of the rotating shaft (304); the side surface of the gear (303) meshes with the inner wall of the gear plate (301); the side surface of the rotating gear (305) meshes with the side surface of the gear (303); the number of the gears (303) is set to be a plurality and arranged in a circumferential array on the inner wall of the gear plate (301); the number of the filter plates (306) is set to be a plurality and arranged in a circumferential array on the circumferential surface of the rotating shaft (304).

3. A multi-stage combined atmosphere purification device according to claim 2, It is characterized in that The top of the protective plate (101) is provided with an adjustment device (4), the adjustment device (4) comprising a belt (401), the belt (401) being rotatably connected to the circumferential surface of the rotating rod (212), one end of the belt (401) away from the rotating rod (212) being rotatably connected to a connecting rod (402), the circumferential surface of the connecting rod (402) being provided with a slot (403), the bottom of the connecting rod (402) being provided with a positioning rod (404), the circumferential surface of the positioning rod (404) being fixedly connected to a bevel gear (407), and the protective plate (101) being provided with a positioning rod (404) and a bevel gear (407) being fixedly connected to the circumferential surface of the positioning rod (404). A reciprocating screw (408) passes through the side of the plate (101), a bevel gear (409) is fixedly connected to the circumferential surface of the reciprocating screw (408), a threaded block (410) is threadedly connected to the circumferential surface of the reciprocating screw (408), a mounting plate (406) is fixedly connected to the other side of the protective plate (101), a support rod (412) is fixedly connected to the side of the threaded block (410), a positioning block (413) is fixedly connected to the end of the support rod (412) away from the threaded block (410), and the side of the protective plate (101) is fixedly connected to the mounting plate (406). The fixing rod (414) is connected to the side of the positioning block (413) and is rotatably connected to a rotating shaft (415). The end of the rotating shaft (415) away from the positioning block (413) is rotatably connected to a mounting block (416). The bottom of the threaded block (410) is slidably connected to the top of the protective plate (101). The positioning rod (404) passes through the top of the mounting plate (406). The circumferential surface of the fixing rod (414) is slidably connected to the side of the positioning block (413). The top of the protective plate (101) is fixedly connected to the positioning plate (411). The side of the positioning plate (411) is rotatably connected to one end of the reciprocating screw (408), the bottom of the other protective plate (101) is fixedly connected to the top of the mounting block (416), one end of the other rotating shaft (415) is rotatably connected to the side of the protective plate (101), the side of the helical gear (407) is meshed with the side of the bevel gear (409), the number of the fixing rods (414) is set to two, and they are symmetrical along the vertical center axis of the protective plate (101), and the circumferential surface of the connecting rod (402) is provided with a ball (417).

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