Steel fireproof door surface cleaning device and using method thereof

Abstract

The invention discloses a steel fireproof door surface cleaning device and a using method thereof, and belongs to the technical field of fireproof door surface cleaning.The cleaning device comprises a conveying platform, a flushing assembly, a scrubbing mechanism, an overturning assembly, a protective cover, a water storage tank, a soaking tank and a lifting carrier plate; a water storage tank is arranged on the lower side of the conveying platform, a soaking box is arranged on the rear side of the conveying platform, a lifting carrier plate is arranged in the soaking box, a flushing assembly and a scrubbing mechanism are arranged in a protective cover, and overturning assemblies are arranged on the two sides of the exterior of the soaking box. The cleaning degree and cleaning efficiency of the surface of the fireproof door are improved by combining flushing, brushing and ultrasonic vibration. And a lifting connecting plate and an extrusion control plate in the brushing mechanism change the downward pressure for brushing the surface of the fireproof door by adjusting the distance, and the types of applicable fireproof doors can be increased.

Description

Technical Field

[0001] The invention relates to the technical field of fire door surface cleaning, and in particular to a steel fire door surface cleaning device and a use method thereof. Background Art

[0002] Steel fire doors are an important fire protection facility and are widely used in buildings. They can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. They are often installed in fire compartments, evacuation stairwells, vertical shafts and other locations as fire partitions with certain fire resistance. When a fire occurs, steel fire doors can effectively prevent the spread of fire and smoke, buy time for personnel evacuation and fire rescue, and protect the safety of personnel and property.

[0003] During the production and processing of steel fire doors, they need to be cleaned before filling to avoid residual oil and rust on the surface of the fire doors, which will affect the overall thermal insulation performance of the fire doors. Therefore, the surface of the fire doors needs to be cleaned. At present, the cleaning of fire doors on the market mainly relies on manual cleaning by workers or surface cleaning by simple wiping mechanisms. The cleaning is prone to incomplete problems, low cleaning efficiency, and the fire door needs to be turned over manually after cleaning one side, which is complicated.

[0004] Currently, there is no good method on the market to solve the above problems. Summary of the invention

[0005] The invention provides a steel fire door surface cleaning device and a use method thereof, which are used to solve the defects in the prior art that the steel fire door surface cleaning is not thorough enough, the efficiency is low, and the surface cannot be automatically turned over for cleaning.

[0006] In one aspect, the present invention provides a steel fire door surface cleaning device, comprising:

[0007] A conveying platform, wherein a protective cover is arranged on the upper side of the outer side of the conveying platform, a water storage tank is arranged inside the lower side of the conveying platform, a soaking box is arranged on the rear side of the conveying platform, and a lifting carrier plate is arranged inside the soaking box; a flushing component, wherein the flushing component comprises a plurality of nozzles arranged along the conveying direction of the conveying platform; a brushing mechanism, wherein the brushing mechanism comprises a lifting connecting plate arranged inside the protective cover, wherein the front and rear sides of the lifting connecting plate are fixedly connected with mounting boxes, wherein both sides of the lower end of the outer side of the mounting box are rotatably connected with elliptical eccentric rotating brush plates, an extrusion control plate is arranged above the lifting connecting plate, and extrusion springs are arranged on both sides of the front and rear sides between the extrusion control plate and the lifting connecting plate; a flipping component, wherein the flipping component comprises lifting cylinders arranged on both sides of the outer side of the soaking box, wherein the output end of the upper end of the lifting cylinder is fixedly connected with a flipping mounting plate.

[0008] Optionally, the flushing assembly includes water-passing elbows arranged on both sides of the outside of the protective cover, the lower ends of the middle parts of the water-passing elbows are fixedly connected with water pipes, the other ends of the water pipes connected to the water-passing elbows penetrate the side walls of the conveying platform and are connected inside the water storage tank, the side of the water-passing elbow close to the protective cover is fixedly connected with a plurality of evenly distributed water spray pipes, the other ends of the water spray pipes connected to the water-passing elbows extend into the inside of the protective cover, the other ends of the water spray pipes connected to the water-passing elbows are fixedly connected with connecting hoses, and the nozzles are fixedly connected to the end of the connecting hose away from the water spray pipes; the nozzles are hinged with supporting connecting rods at the front and rear of the outside of the nozzles, the other ends of the supporting connecting rods connected to the nozzles are hinged to the inner wall of the protective cover, adjusting electric push rods are hinged on both sides of the inside of the protective cover below the connecting hoses, the output ends of the adjusting electric push rods are hinged to the lower side of the nozzles, water pumps used in conjunction with the water pipes are fixedly connected on both sides of the outside of the conveying platform, filters used in conjunction with the water pipes are arranged on both sides of the inside of the water storage tank, and the nozzles on both sides of the inside of the protective cover are staggered front and back.

[0009] Optionally, the rotating shaft of the eccentric rotating brush plate extends to the interior of the installation box, and both sides of the lower end of the interior of the installation box are rotatably connected with driven gears, and two mutually meshing driving gears are arranged on the lower side of the interior of the installation box, and the driving gear and the driven gear are meshed. A brushing motor is fixedly connected to one side of the upper end of the exterior of the installation box, and the output end of the lower end of the brushing motor is fixedly connected to the rotating shaft of the driving gear.

[0010] Optionally, an adjusting screw is fixedly connected to the middle part of the lower side of the extrusion control plate, the lower end of the adjusting screw extends to the middle part of the lower side of the lifting connecting plate, the middle part of the lower side of the lifting connecting plate is rotatably connected to an adjusting nut threadedly connected to the adjusting screw, a brushing adjusting cylinder is fixedly connected to the middle part of the upper end of the protective cover, and the output end of the lower end of the brushing adjusting cylinder is fixedly connected to the middle part of the upper side of the extrusion control plate.

[0011] Optionally, the inner center of the flip mounting plate is rotatably connected to a connecting circular plate, the sides of the flip mounting plates that are away from each other are fixedly connected to a flip motor mounting plate, the middle parts of the sides of the connecting circular plates that are close to each other are fixedly connected to a synchronous telescopic electric cylinder, and linkage cylinders are arranged at the four corners of the outside of the immersion box, the output end of the upper end of the linkage cylinder is fixedly connected to the ears at the four corners of the lifting carrier plate, and the ends of the synchronous telescopic electric cylinders that are close to each other are provided with clamping assemblies.

[0012] Optionally, the clamping assembly includes a clamping arm fixedly connected to one end of the synchronous telescopic electric cylinder that is close to each other, and the front and rear sides of the clamping arm that are away from each other are fixedly connected to limit rods, the other end of the limit rod is connected to the clamping arm and passes through to the side of the connecting circular plate that is away from each other, the upper surface of the clamping arm and the upper surface of the lifting carrier plate are parallel to each other, an anti-slip gasket is fixedly connected to the lower side of the inside of the clamping arm, and the upper end of the outside of the clamping arm is fixedly connected to the clamping electric cylinder, and the output end of the clamping electric cylinder passes through the inside of the clamping arm.

[0013] Optionally, the front and rear ends of the lifting cylinder base are fixedly connected with guide sleeves, the front and rear ends of the lower end of the flip mounting plate are fixedly connected with guide rods, and the guide rods are inserted into the guide sleeves; the sides of the flip motor mounting plates away from each other are fixedly connected with flip motors, and the flip motors rotate 180° once, and the output end of the flip motor is fixedly connected to the rotating shaft on the side of the connecting circular plate away from each other.

[0014] Optionally, a number of evenly distributed rubber protective strips are fixedly connected to the front and rear upper ends of the protective cover, the upper surface of the lifting carrier plate is tilted backward, water leakage slots are provided at the front and rear ends of the upper end of the lifting carrier plate, operation slots are provided on both sides of the upper end of the lifting carrier plate, and central auxiliary baffles used in conjunction with the operation slots are fixedly connected to both sides of the interior of the immersion box, and an ultrasonic generator is provided on the lower side of the outside of the immersion box.

[0015] On the other hand, the present invention provides a method for using a surface cleaning device for a steel fire door, comprising the following steps: adjusting the distance between a lifting connecting plate and an extrusion control plate in a brushing mechanism according to the thickness of the steel door; arranging a conveying platform and a soaking box according to the cleaning requirements; placing the steel fire door in a centered position on the conveying platform, and transporting it backward for cleaning and turning over.

[0016] Optionally, the arrangement of the conveying platforms and the soaking boxes includes: arranging the two conveying platforms and the two soaking boxes in an alternating front-to-back manner, after rinsing and brushing on the conveying platform, sending it to the soaking box at the rear for ultrasonic vibration cleaning, and turning it over, and then continuing to transport the steel fire door backward and entering the next conveying platform, and rinsing, brushing and ultrasonic vibration cleaning the other side of the steel fire door; the arrangement of the conveying platforms and the soaking boxes also includes: setting up a plurality of conveying platforms and two soaking boxes that are alternately arranged, two conveying platforms and two soaking boxes form a group, the cleaning liquid contained in the water storage tank at the lower end of each group of conveying platforms is the same, and other different cleaning liquids are contained in the water storage tank at the rear, and the distance between the lifting connecting plate and the extrusion control plate on each group of conveying platforms is adjusted from front to back with a trend of gradually approaching.

[0017] The present invention provides a steel fire door surface cleaning device and a method for using the same, which have at least the following technical effects or advantages:

[0018] 1. By alternately arranging and combining the conveying platform and the soaking box, a variety of combinations are provided, which facilitates the change of the arrangement mode and the combination of cleaning methods according to the specific steel fire door. The steel fire door can be automatically turned over after flushing and brushing one side by using the clamping component and the flipping component to clean the other side;

[0019] 2. The downward pressure on the surface of the fire door can be changed by adjusting the distance through the lifting connection plate and the extrusion control plate in the brushing mechanism, and the types of applicable fire doors can be increased to achieve the function of surface cleaning of fire doors of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The three-dimensional diagram of the assembly state of the steel fire door surface cleaning device provided by an embodiment of the present invention Figure 1 ;

[0022] Figure 2 The three-dimensional schematic diagram of the steel fire door surface cleaning device of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 3 This is a three-dimensional enlarged schematic diagram of the conveying platform of the present invention. Figure 1 ;

[0024] Figure 4 This is a three-dimensional enlarged schematic diagram of the conveying platform of the present invention. Figure 2 ;

[0025] Figure 5 This is a three-dimensional enlarged schematic diagram of the conveying platform of the present invention. Figure 3 ;

[0026] Figure 6 This is a three-dimensional enlarged schematic diagram of the conveying platform of the present invention. Figure 4 ;

[0027] Figure 7 This is a three-dimensional enlarged schematic diagram of the scrubbing mechanism of the present invention. Figure 1 ;

[0028] Figure 8This is a three-dimensional enlarged schematic diagram of the scrubbing mechanism of the present invention. Figure 2 ;

[0029] Fig. 9 This is a three-dimensional enlarged schematic diagram of the scrubbing mechanism of the present invention. Figure 3 ;

[0030] Fig.10 is an enlarged schematic cross-sectional view of the scrubbing mechanism of the present invention;

[0031] Fig.11 It is a three-dimensional enlarged schematic diagram of the water storage tank of the present invention;

[0032] Fig.12 It is a three-dimensional enlarged schematic diagram of the partial structure of the flushing component of the present invention;

[0033] Fig.13 This is a three-dimensional enlarged schematic diagram of the flip assembly of the present invention. Figure 1 ;

[0034] Fig.14 This is a three-dimensional enlarged schematic diagram of the flip assembly of the present invention. Figure 2 ;

[0035] Fig.15 This is a three-dimensional enlarged schematic diagram of the flip assembly of the present invention. Figure 3 ;

[0036] Fig.16 This is a three-dimensional enlarged schematic diagram of the clamping assembly of the present invention. Figure 1 ;

[0037] Fig.17 This is a three-dimensional enlarged schematic diagram of the clamping assembly of the present invention. Figure 2 ;

[0038] Fig.18 It is a three-dimensional enlarged schematic diagram of the lifting carrier of the present invention;

[0039] Fig.19 The present invention is a schematic flow chart of a method for using the surface cleaning device for a steel fire door.

[0040] Reference numerals:

[0041] 1. Conveying platform; 2. Flushing assembly; 201. Water elbow; 202. Water pipe; 203. Water spray pipe; 204. Connecting hose; 205. Spray head; 206. Support connecting rod; 207. Adjusting electric push rod; 208. Water pump; 209. Filter; 3. Scrubbing mechanism; 301. Lifting connecting plate; 302. Mounting box; 303. Eccentric rotating brush plate; 304. Extrusion control board; 305. Damping rod; 306. Extrusion spring; 307. Driven gear; 308. Driving gear; 309. Scrubbing motor; 310. Adjusting screw; 311. Adjusting nut; 312. Scrubbing adjusting air Cylinder; 4, flip assembly; 401, lifting cylinder; 402, flip mounting plate; 403, connecting round plate; 404, flip motor mounting plate; 405, synchronous telescopic electric cylinder; 406, linkage cylinder; 407, guide sleeve; 408, guide rod; 409, flip motor; 5, protective cover; 6, water storage tank; 7, immersion tank; 8, lifting carrier plate; 9, clamping assembly; 901, clamping arm; 902, limit rod; 903, anti-slip pad; 904, clamping electric cylinder; 10, rubber protective baffle; 11, water leakage slot hole; 12, operation slot hole; 13, centering auxiliary baffle; 14, ultrasonic generator. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0043] As mentioned above, fire doors have two sides. The cleaning of fire doors currently relies mainly on manual cleaning by workers or surface cleaning through a simple wiping mechanism. After cleaning, stains are likely to remain on the surface of the fire door, and there is a high probability of incomplete cleaning. In addition, manual cleaning is inefficient. After cleaning one side of the fire door, it needs to be manually turned over to clean the other side, which is complicated to operate.

[0044] In view of this, the present invention provides a surface cleaning device for steel fire doors, which can be arranged and combined alternately through a conveying platform 1 and a soaking box 7, and the flushing component 2 and the brushing mechanism 3 cooperate with each other for cleaning. The steel fire door can be turned over by itself to clean the other side after flushing and brushing one side by using a clamping component 9 and a flipping component 4. The combination of flushing, brushing and ultrasonic vibration increases the degree of cleaning and cleaning efficiency of the surface of the fire door. The lifting connecting plate 301 and the extrusion control plate 304 in the brushing mechanism 3 change the downward pressure of brushing the surface of the fire door by adjusting the distance, and can increase the types of applicable fire doors.

[0045] Combine the following Figures 1 to 18 The present invention is described in detail.

[0046] First embodiment:

[0047] like Figures 1 to 18 As shown, the present invention provides a cleaning device, in particular, a steel fire door surface cleaning device. In this embodiment, the cleaning device includes a conveying platform 1, a flushing component 2, a brushing mechanism 3, a flip component 4, a protective cover 5, a water storage tank 6, a soaking tank 7 and a lifting plate 8 arranged inside the soaking tank 7. Among them, the conveying platform 1 is a plurality of conveying rollers that are conveyed by a sprocket and a chain, and the sprockets at the front and rear ends have a smaller radius than the sprockets on the conveying rollers in the middle part, so that the speed of the conveying rollers transmitted to the middle part is reduced, and the time that the steel fire door is in the middle section is increased, and the surface of the conveying roller is coated with a sticky anti-skid coating. The bottom of the conveying platform 1 is hollow, and a water storage tank 6 is placed at the lower end of the interior. The water storage tank 6 can be filled with clean water, rust remover or other non-oily detergents. A protective cover 5 is arranged on the upper side of the conveying platform 1, and the two sides of the lower end of the protective cover 5 are fixedly connected to the two sides of the upper end of the conveying platform 1. A flushing assembly 2 is formed by arranging pipelines and nozzles between the protective cover 5 and the water storage tank 6, and the steel fire door transported on the conveying platform 1 is sprayed with a cleaning agent. A brushing mechanism 3 is arranged inside the protective cover 5, and the surface of the steel fire door sprayed with the cleaning agent is brushed and cleaned by the brushing mechanism 3. A soaking box 7 is arranged on the rear side of the conveying platform 1, and the height of the soaking box 7 must be less than or equal to the height of the conveying platform 1 to ensure that the steel fire door can be transported into the soaking box 7. An ultrasonic generator 14 is fixedly connected to the front and rear of the lower end of the outer side of the soaking box 7. The ultrasonic generator 14 propagates to the inside of the soaking box 7, and the liquid inside the soaking box 7 generates small bubbles. The vibration generated by the bursting of the bubbles cleans the stains brushed off the steel fire door and the dirt inside the gap of the steel fire door. Then, the lifting plate 8 in the soaking box 7 is lifted and lowered to turn over the steel fire door under the operation of the flip assembly 4 and continue to be transported backward, and the above steps are repeated.

[0048] like Figure 3 to Figure 6As shown, the flushing assembly 2 includes: a water elbow 201, a water delivery pipe 202, a water spray pipe 203, a connecting hose 204, a nozzle 205, a supporting connecting rod 206, an adjusting electric push rod 207, a water pump 208 and a filter 209. The water elbow 201 is arranged on both sides of the outside of the protective cover 5, asymmetrically arranged, and the front and rear positions are staggered by a certain distance. A water pipe 202 is fixedly connected to the middle of the lower end of the water-passing elbow 201. The lower end of the water pipe 202 passes through the outer side of the conveying platform 1 and extends into the water tank 6 inside the conveying platform 1, and is connected to the inside of the water tank 6. Filters 209 are arranged on both sides of the lower end of the water tank 6. The filter 209 filters the cleaning liquid or clean water inside the water tank 6 before entering the water pipe 202, so as to prevent the cleaning liquid used to wash the steel fire door from the inside of the protective cover 5 from being sucked into the water pipe 202 with large impurities such as dirt and debris on the steel fire door, thereby blocking or damaging the water pump 208 on the water pipe 202. Two water pumps 208 are fixedly connected to the water pipes 202 on both sides of the outer side of the conveying platform 1, and the water pumps 208 are connected to the water pumps 208. The cleaning agent inside the water tank 6 is transported to the inside of the water pipe 202 through the water pumps 208.

[0049] Several water spray pipes 203 (four are used as an example in this application) are fixedly connected to the side of the water bend 201 that is close to each other. The water spray pipes 203 on both sides are staggered, with one side in front and the other side slightly behind. The water spray pipes 203 are aligned with the gap on the other side to increase the contact area for flushing, increase the efficiency of spraying the cleaning agent, and avoid the impact of the sprayed flushing agents on the surface of the steel fire door. The other end of the water spray pipe 203 connected to the water bend 201 passes through the interior of the protective cover 5, and a connecting hose 204 is fixedly connected to the end extending into the protective cover 5. The connecting hose 204 can be bent, and a nozzle 205 is fixedly connected to the other end of the connecting hose 204. The nozzle 205 reduces the aperture and pressurizes the delivered cleaning agent for spraying.

[0050] A support link 206 is hinged at the front and rear of the outside of the nozzle 205. The other end of the support link 206 connected to the nozzle 205 is hinged to the inside of the protective cover 5 at the front and rear of the water spray pipe 203 extending position, providing support for the nozzle 205. An adjustment electric push rod 207 is connected to the inside of the protective cover 5 at the lower part of the water spray pipe 203 extending position. The output end of the adjustment electric push rod 207 is hinged to the lower side of the nozzle 205. The pitch angle of the nozzle 205 is adjusted by adjusting the extension of the electric push rod 207, and the angle of the nozzle 205 for flushing the steel fire door is adjusted. The dirt scrubbed off the surface of the steel fire door can be flushed into the water storage tank 6 below along the flushing of the nozzle 205. In order to reduce the splashing of the cleaning liquid when flushing the steel fire door, a number of uniformly distributed rubber protective baffles 10 are set at the front and rear ends of the protective cover 5.

[0051] like Figure 1 and Figure 2 As shown, in order to further clean and turn over the delivered steel fire door, a soaking box 7 is provided on the rear side of the delivery platform 1, and the height of the soaking box 7 does not exceed the height of the delivery platform 1. As the delivery platform 1 delivers the steel fire door, the rear end of the steel fire door enters the interior of the soaking box 7. A lifting plate 8 is provided inside the soaking box 7, and the upper surface of the lifting plate 8 is tilted backward (this application takes the backward tilt of 8° as an example). It is necessary to ensure that the downward sliding force of the steel fire door under the influence of gravity is greater than the friction between the fire door and the lifting plate 8. The smoothness of the upper surface of the lifting plate 8 must be ensured as much as possible, so that the steel fire door entering the soaking box 7 has a tendency to continue to slide backward for delivery. The four corners of the lifting plate 8 are provided with ears, and the four corners of the outside of the soaking box 7 are provided with linkage cylinders 406. The telescopic end of the linkage cylinder 406 is fixedly connected with the ears of the lifting plate 8. The PLC control program controls the synchronous lifting of the linkage cylinder 406 to control the lifting of the lifting plate 8 inside the soaking box 7. The ultrasonic generator 14 is provided at the lower end of the outside of the soaking box 7. The ultrasonic generator 14 transmits to the inside of the soaking box 7, so that small bubbles are generated in the liquid inside the soaking box 7. The vibration generated by the bursting of the bubbles cleans the stains left after brushing of the steel fire door and the stains in the gaps.

[0052] In order to turn over the steel fire door that has been ultrasonically cleaned inside the immersion box 7, a flip assembly 4 is set on both sides of the outside of the immersion box 7. The flip assembly 4 includes: a lifting cylinder 401, a flip mounting plate 402, a connecting circular plate 403, a flip motor mounting plate 404, a synchronous telescopic electric cylinder 405, a linkage cylinder 406, a guide sleeve 407, a guide rod 408 and a flip motor 409. The lifting cylinder 401 is set on both sides of the outside of the immersion box 7, the base of the lifting cylinder 401 is connected to the ground, and the side of the lifting cylinder 401 close to the immersion box 7 is also fixedly connected by a connecting rod. Figure 15 to Figure 17 As shown, a flip mounting plate 402 is fixedly connected to the telescopic end of the upper end of the lifting cylinder 401, a connecting circular plate 403 is rotatably connected to the center of the flip mounting plate 402, and the connecting circular plate 403 can rotate inside the flip mounting plate 402, and a synchronous telescopic electric cylinder 405 is fixedly connected to the side of the connecting circular plates 403 close to each other. A clamping assembly 9 is provided at the end of the synchronous telescopic electric cylinder 405 close to each other, and the steel fire door lifted by the lifting carrier 8 is clamped by the clamping assembly 9.

[0053] A flip motor mounting plate 404 with an L-shaped cross section is fixedly connected to the side of the flip mounting plate 402 that is away from each other, and a flip motor 409 is fixedly connected to the side of the flip motor mounting plate 404 that is away from each other. The output end of the flip motor 409 that is close to each other is fixedly connected to the rotating shaft of the connecting circular plate 403 that is away from each other. The flip motor 409 rotates 180° once, and has a locking function after rotation. In order to smoothly flip the steel fire door and avoid the immersion box 7 and the lifting plate 8 from hindering the flipping of the steel fire door, the lifting cylinder 401 first raises the clamped steel fire door and then flips it 180°. At the same time, in order to avoid the flip assembly 4 and the clamping assembly 9 from hindering the lifting of the lifting plate 8, the clamping assembly 9 is moved closer to or away from each other through the telescopic synchronous telescopic electric cylinder 405, and operating slots 12 are opened on both sides of the upper end of the lifting plate 8 to expose the edges of the steel fire door on both sides for easy clamping.

[0054] In order to ensure the stability of the lifting of the flip mounting plate 402, a guide rod 408 is fixedly connected to the front and rear of the lower end of the flip mounting plate 402, and a guide sleeve 407 is fixedly connected to the front and rear of the base of the lifting cylinder 401. The guide rod 408 is inserted into the inside of the guide sleeve 407 to prevent the flip mounting plate 402 from rotating and ensure vertical lifting. The base of the lifting cylinder 401 is installed on the ground, and the stability is increased by cooperating with the connecting rod close to the soaking box 7. The linkage cylinders 406 at the four corners of the soaking box 7 are fixed on the ground, and can also be welded to the four corners of the soaking box 7.

[0055] The clamping assembly 9 provided on the synchronous telescopic electric cylinder 405 includes: a clamping arm 901, a limit rod 902, an anti-skid pad 903 and a clamping electric cylinder 904. The clamping arm 901 is U-shaped, fixedly connected to the end of the synchronous telescopic electric cylinder 405 that is close to each other, with the openings facing each other, and the upper end surface of the clamping arm 901 is parallel to the inclined surface of the upper surface of the lifting carrier 8, so as to ensure that the clamping arm 901 can be close to each other and clamped on the two edges of the steel fire door, an anti-skid pad 903 is fixedly connected to the inner lower end of the clamping arm 901, and a clamping electric cylinder 904 is fixedly connected to the outer upper end surface of the clamping arm 901, and the output end of the clamping electric cylinder 904 passes through the surface of the clamping arm 901 and extends into the interior of the clamping arm 901, and after fixing the edge of the steel fire door, the steel fire door is clamped and fixed with the anti-skid pad 903.

[0056] A limit rod 902 is fixedly connected to the front and rear of the side where the clamping arms 901 are away from each other. The other end of the limit rod 902 connected to the clamping arms 901 passes through the circular hole at the corresponding position on the connecting circular plate 403 to limit the clamping arms 901, ensuring that the clamping arms 901 can only move horizontally closer to or farther from each other, and the clamping arms 901 can only be rotated by turning the connecting circular plate 403 180 degrees by the flip motor 409. Leakage slots 11 are provided at the front and rear positions of the upper end of the lifting carrier plate 8, so that the cleaning liquid in the soaking box 7 that is lifted up can flow back to the inside of the soaking box 7 when the steel fire door is lifted. A central auxiliary baffle 13 is fixedly connected to both sides of the interior of the immersion box 7. The central auxiliary baffle 13 is elastic, thin at the front and rear edges, and thick in the middle. It guides the steel fire door sliding into the immersion box 7, and cooperates with the clamping arms 901 to approach each other, squeezing the lifted steel fire door to the middle position. When the lifting plate 8 continues to lift the steel fire door released by the clamping arm, the steel fire door can enter the next conveying platform 1 at the middle position for transportation.

[0057] The steel fire door is placed on the conveying platform 1 in the center. The conveying platform 1 conveys the steel fire door backward through the conveying roller. After the fire door enters the interior of the protective cover 5, it is rinsed by the nozzle 205 to remove the impurities on the surface first. The nozzle 205 adjusts the pitch angle under the telescopic control of the electric push rod 207 to rinse and clean the surface of the fire door. Then, the fire door is transported out from the interior of the protective cover 5 by the conveying roller. After the rear end of the fire door enters the interior of the soaking box 7, the fire door enters the interior of the soaking box 7 under the influence of the rear end weight of the fire door and the speed of the fire door conveying. The ultrasonic generator 14 at the lower end of the outer side of the soaking box 7 vibrates the cleaning liquid inside the soaking box 7 to generate small bubbles, and cleans the surface of the steel fire door and the inside of the gap. Then, the linkage cylinder 406 extends to raise the lifting carrier 8 until the rear end of the fire door does not exceed the inner rear end wall of the soaking box 7, and the fire door will not slide backward. Next, control the lifting cylinder 401 to lift and adjust the height of the clamping arm 901 so that the clamping arm 901 is aligned with the edge of the steel fire door, or directly ensure the initial position of the clamping arm 901 by directly controlling the lifting of the lifting carrier plate 8 so that the clamping arm 901 is aligned with the edge of the fire door.

[0058] The synchronous telescopic electric cylinder 405 is extended through the PLC control program, and after clamping the edge of the fire door, the clamping electric cylinder 904 clamps the fire door with the anti-slip pad 903. The lifting cylinder 401 continues to be raised, and the lifting plate 8 is lowered to the bottom. The flip motor 409 drives the connecting circular plate 403 to flip 180 degrees, lowers the lifting cylinder 401 to the initial position, and raises the lifting plate 8 until the upper surface of the lifting plate 8 contacts the bottom surface of the steel fire door. The linkage cylinder 406 and the lifting cylinder 401 are synchronously controlled to shorten, so that the lifting plate 8 and the clamping arm 901 are both lowered. The rear end of the lifting plate 8 needs to be lowered to exceed the rear upper end surface of the immersion box 7, and then the clamping electric cylinder 904 releases the edge of the fire door, and the synchronous telescopic electric cylinder 405 retracts synchronously, and the clamping arms 901 move away from each other. Since the upper surface of the lifting plate 8 is tilted backward, under the influence of gravity, the fire door slides backward to the top of the next conveying platform 1, and then repeats the flushing and conveying to clean the other side of the fire door. In order to avoid the dirt on the surface of the steel fire door after it is placed on the conveying platform 1. The effect of the stickiness of the conveying roller surface, the surface of the conveying roller needs to be cleaned regularly to ensure the stickiness of the material on the surface of the conveying roller.

[0059] Second embodiment:

[0060] like Figure 7 to Figure 10The steel fire door transported into the protective cover 5 can also be scrubbed after flushing. A scrubbing mechanism 3 is arranged at the center of the upper cover inside the protective cover 5. The scrubbing mechanism includes: a lifting connection plate 301, a mounting box 302, an eccentric rotating brush plate 303, an extrusion control plate 304, a damping rod 305, an extrusion spring 306, a driven gear 307, a driving gear 308, a scrubbing motor 309, an adjusting screw 310, an adjusting nut 311 and a scrubbing adjustment cylinder 312. The scrubbing adjustment cylinder 312 is fixedly connected to the center of the upper end of the protective cover 5, and an extrusion control plate 304 is fixedly connected to the output end of the lower end of the scrubbing adjustment cylinder 312. A positioning rod is fixedly connected to the front and rear ends of the upper end of the extrusion control plate 304. The positioning rod passes through the circular holes at two corresponding positions on the upper end of the protective cover 5 to limit the extrusion control plate 304, ensuring that the extrusion control plate 304 can only move up and down in the vertical direction. A damping rod 305 is fixedly connected to each of the four corners of the lower end of the extrusion control plate 304. A lifting connecting plate 301 is arranged at the lower end of the damping rod 305, and the telescopic ends of the lower end of the damping rod 305 are respectively fixedly connected to the four corners of the upper side of the lifting connecting plate 301. An extrusion spring 306 is sleeved on the outside of each damping rod 305, and the extrusion spring 306 squeezes the lifting connecting plate 301 and the extrusion control plate 304 in a direction away from each other, so that the lifting connecting plate 301 has a certain buffer space and a certain downward force when moving downward.

[0061] like Figure 8 As shown, a mounting box 302 is fixedly connected to the front and rear of the lifting connection plate 301, and an elliptical eccentric rotating brush plate 303 is rotatably connected to both sides of the outer lower end of the mounting box 302, and the rotating shaft of the eccentric rotating brush plate 303 extends to the inside of the mounting box 302. A driven gear 307 is rotatably connected to both sides of the inner lower end of the mounting box 302, and the driven gear 307 and the rotating shaft at the upper end of the eccentric rotating brush plate 303 are fixedly connected together, and the eccentric rotating brush plate 303 is driven to rotate by the driven gear 307. Two mutually meshing driving gears 308 are also rotatably connected between the two driven gears 307 at the inner lower end of the mounting box 302, and the two driving gears 308 are respectively meshed with the driven gears 307 on both sides. The eccentric rotating brush plates 303 on both sides rotate in opposite directions through the rotation of the driving gears 308, as shown in FIG. Figure 7 to Figure 9 As shown, when the long side of the eccentric rotating brush plate 303 on one side rotates to the inward position, the short side of the eccentric rotating brush plate 303 on the other side rotates to the inward direction, and the eccentric rotating brush plates 303 on both sides rotate staggered to avoid collision, and the surface of the steel fire door is frictionally scrubbed. A scrubbing motor 309 is fixedly connected to one side of the outer upper end of the installation box 302, and drives one of the driving gears 308 to provide driving force.

[0062] In addition, a circular hole is provided at the center of the upper side of the lifting connection plate 301, and an adjusting screw 310 is fixedly connected at the center of the lower end of the extrusion control plate 304, and the lower end of the adjusting screw 310 passes through the circular hole in the center of the lifting connection plate 301. An adjusting nut 311 is rotatably connected at the middle of the lower side of the lifting connection plate 301, and the adjusting nut 311 and the adjusting screw 310 are threadedly connected together. By rotating the adjusting nut 311, the distance between the lifting connection plate 301 and the extrusion control plate 304 can be changed, and the initial compression amount of the extrusion spring 306 can be changed, thereby adjusting the downward pressure of the lifting connection plate 301. Combined with flushing, brushing and ultrasonic vibration cleaning, multiple cleaning methods are combined to increase the surface cleaning degree and cleaning efficiency of the fire door.

[0063] The fire door is placed in the center on the first conveying platform 1 at the front, and conveyed backward. After being flushed by the flushing assembly 2, the steel fire door passes through the rubber protective baffle 10 and is conveyed to the inside of the protective cover 5, and the conveying roller of the conveying platform 1 rotates slowly. Before conveying the steel fire door, the distance between the lifting connecting plate 301 and the extrusion control plate 304 can be adjusted by rotating the adjusting nut 311, and then the elastic force of the extrusion spring 306 at the four corners between the lifting connecting plate 301 and the extrusion control plate 304 can be adjusted. The smaller the distance between the lifting connecting plate 301 and the extrusion control plate 304, the greater the elastic potential energy of the extrusion spring 306. When the lower end of the eccentric rotating brush plate 303 contacts the surface of the fire door, the steel fire door moves slowly backward along with the sticky adhesion of the conveying roller surface of the conveying platform 1, and the surface is brushed and cleaned under the extrusion and rotation of the eccentric rotating brush plate 303 while moving backward. The eccentric rotating brush plates 303 on both sides rotate in opposite directions and are staggered when rotating. When the long end of the eccentric rotating brush plate 303 on one side rotates inward, the short end of the eccentric rotating brush plate 303 on the other side also rotates inward, avoiding collision between the eccentric rotating brush plates 303 on both sides.

[0064] When the adjusting nut 311 is rotated to adjust the distance between the squeezing control plate 304 and the lifting connecting plate 301, the distance between the two plates is adjusted, and the initial elastic force of the squeezing spring 306 is adjusted. The relationship between the elastic force of the spring and the amount of elongation or compression is: F=kx, where F is the elastic force of the spring (in N), k is the elastic coefficient of the spring (in N / m), and x is the amount of compression or elongation of the spring (in m).

[0065] Based on the same general inventive concept, the present invention also protects a method for using a steel fire door surface cleaning device, such as Fig.19 , which includes the following steps:

[0066] S100, adjusting the distance between the lifting connecting plate 301 and the extrusion control plate 304 in the scrubbing mechanism 3 according to the thickness of the steel door;

[0067] S200, arranging the conveying platform 1 and the soaking box 7 according to the cleaning requirements;

[0068] S300, placing the steel fire door in a central position on the conveying platform 1, and transporting it backwards for cleaning and turning over.

[0069] For example, in an embodiment of the present invention, the above steps may include:

[0070] In S100, when adjusting the distance between the lifting connection plate 301 and the extrusion control plate 304, according to the formula: F = kx, where F is the elastic force of the spring (in N), k is the elastic coefficient of the spring (in N / m), and x is the amount of compression or elongation of the spring (in m). It can be obtained that the longer the length of the spring is compressed, the greater the elastic force it has. After adjusting the distance between the lifting connection plate 301 and the extrusion control plate 304, the lower brush surface of the eccentric rotating brush plate 303 can be adjusted to contact the surface of the steel fire door by coordinating the lifting and lowering of the brushing adjustment cylinder 312 to perform brushing. The brushing adjustment cylinder 312 can also be extended continuously to allow the eccentric rotating brush plate 303 to perform extrusion-type brushing on the surface of the steel fire door. The brushing adjustment cylinder 312 can be extended slowly in a linear manner to gradually increase the downward pressure of the eccentric rotating brush plate 303 on the surface of the steel fire door. Due to the different distances between the adjustment lifting connecting plate 301 and the extrusion control plate 304, the initial elastic force of the extrusion spring 306 is different. The distance between the adjustment lifting connecting plate 301 and the extrusion control plate 304 is smaller, and the distance between the adjustment lifting connecting plate 301 and the extrusion control plate 304 is slightly larger. The same eccentric rotating brush plate 303 contacts the surface of the steel fire door, and the brushing adjustment cylinder 312 continues to extend by the same amount. The downward pressure of the eccentric rotating brush plate 303 of the former is greater than that of the latter.

[0071] In S200, the conveying platforms 1 and the soaking boxes 7 are arranged in a tandem order, so as to realize an alternating arrangement of one conveying platform 1 and one soaking box 7, and one conveying platform 1 and one soaking box 7. Figure 1 and Figure 2 It is a kind of arrangement method. Figure 1 and Figure 2As shown, the arrangement of the conveying platform 1 and the soaking box 7 may include: arranging two conveying platforms 1 and two soaking boxes 7 in a front-to-back alternating manner, and after rinsing and brushing on the conveying platform 1, the steel fire door is sent to the soaking box 7 behind for ultrasonic vibration cleaning and turned over. Then the steel fire door is transported backwards, enters the next conveying platform 1, rinses and brushes the other side of the steel fire door, and then is sent to the inside of a soaking box 7 behind for ultrasonic vibration cleaning to clean the stains remaining on the other side of the steel fire door.

[0072] The arrangement of the conveying platform 1 and the soaking box 7 can also include: setting up a plurality of conveying platforms 1 and two soaking boxes 7 arranged alternately, that is, continuing to alternately arrange the conveying platforms 1 and the soaking boxes 7 behind the two conveying platforms 1 and the two soaking boxes 7, the two conveying platforms 1 and the two soaking boxes 7 form a group, the cleaning liquid contained in the water storage tank 6 at the lower end of each group of conveying platforms 1 is the same, and other different cleaning liquids can be contained in the water storage tank 6 at the back, and different types of stains such as oil stains, rust, etc. on the surface of the steel fire door are classified and cleaned, and the distance between the lifting connecting plate 301 and the extrusion control plate 304 in the brushing mechanism 3 on each group of conveying platforms 1 can be adjusted from front to back with a trend of gradually approaching, and at the same time, it is necessary to avoid the lower end of the adjusting screw 310 from contacting the upper surface of the steel fire door to achieve gradual pressurization of cleaning, and it is necessary to control the telescopic length of the corresponding brushing adjustment cylinder 312 through the PLC system to ensure that the eccentric rotating brush plate 303 contacts the surface of the steel fire door.

[0073] In S300, the steel fire door is placed on the conveying platform 1 in a central position, and the steel fire door passes through the rubber protective baffle 10 at a relatively slow speed and enters the interior of the protective cover 5. After being rinsed by the rinse component 2 and rinsed and scrubbed by the scrubbing mechanism 3, it enters the interior of the soaking box 7 for ultrasonic vibration cleaning, and then is lifted by the lifting plate 8. After being clamped by the clamping arm 901, the flip motor 409 flips 180°, and then is supported and lifted by the lifting plate 8. The clamping arm 901 releases the edge of the steel fire door. Under the action of gravity, the steel fire door slides backward to the next conveying platform 1 for cleaning on the other side. The distance adjustment between the lifting connecting plate 301 and the extrusion control plate 304 and the combined arrangement between the conveying platform 1 and the soaking box 7 can be applied to more fire doors of different thickness specifications.

[0074] In summary, the steel fire door surface cleaning device of the present invention has the following advantages:

[0075] 1. Combining the two cleaning methods of flushing and brushing, the surface of the steel fire door is cleaned to increase the degree of cleaning and improve the cleaning efficiency. After brushing and flushing, the fire door enters the immersion box 7 to use ultrasonic vibration to clean the gaps and residual dirt on the surface of the fire door, thereby increasing the thoroughness of cleaning and reducing the possibility of dirt affecting the thermal insulation of the fire door.

[0076] Second, the conveying platform 1 and the soaking box 7 can be combined in various forms according to needs, so as to improve the thoroughness of the cleaning of the fire door and the wide range of cleaning adaptability of different types of steel fire doors, thereby increasing the usability.

[0077] The hydraulic cylinder in the equipment is connected to the external hydraulic system, and the PLC control system used to control the motor, cylinder, telescopic rod and electric cylinder is the prior art and common knowledge in the field. It is not an improved technical point in this case, so it will not be elaborated here.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steel fire door surface cleaning device, characterized in that: include: A conveying platform (1), wherein a protective cover (5) is arranged on the upper side of the outside of the conveying platform (1), a water storage tank (6) is arranged inside the lower side of the conveying platform (1), a soaking box (7) is arranged on the rear side of the conveying platform (1), and a lifting plate (8) is arranged inside the soaking box (7); A flushing assembly (2), the flushing assembly (2) comprising a plurality of nozzles (205) arranged along the conveying direction of the conveying platform (1); A brushing mechanism (3), the brushing mechanism (3) comprising a lifting connection plate (301) arranged inside the protective cover (5), the lifting connection plate (301) being fixedly connected to a mounting box (302) at the front and rear ends, an elliptical eccentric rotating brush plate (303) being rotatably connected to both sides of the lower end of the mounting box (302), an extrusion control plate (304) being arranged above the lifting connection plate (301), and extrusion springs (306) being arranged at both sides of the front and rear ends between the extrusion control plate (304) and the lifting connection plate (301); A turnover assembly (4), the turnover assembly (4) comprising lifting cylinders (401) arranged on both sides of the outside of the soaking box (7), the output end of the upper end of the lifting cylinder (401) being fixedly connected to a turnover mounting plate (402).

2. The steel fire door surface cleaning device according to claim 1, characterized in that: The flushing assembly (2) further comprises water-passing elbows (201) arranged on both sides of the outside of the protective cover (5); the lower middle end of the water-passing elbow (201) is fixedly connected to a water delivery pipe (202); the other end of the water delivery pipe (202) connected to the water-passing elbow (201) penetrates the side wall of the conveying platform (1) and is connected to the inside of the water storage tank (6); the side of the water-passing elbow (201) close to the protective cover (5) is fixedly connected to a plurality of evenly distributed water spray pipes (203); the other end of the water spray pipe (203) connected to the water-passing elbow (201) extends to the inside of the protective cover (5); the other end of the water spray pipe (203) connected to the water-passing elbow (201) is fixedly connected to a connecting hose (204); and the spray head (205) is fixedly connected to the end of the connecting hose (204) away from the water spray pipe (203); The nozzle (205) is hinged with a supporting connecting rod (206) at the front and rear of the outside, and the other end of the supporting connecting rod (206) connected to the nozzle (205) is hinged to the inner wall of the protective cover (5). Adjustment electric push rods (207) are hinged to the bottom of the connecting hose (204) on both sides of the inside of the protective cover (5), and the output end of the adjustment electric push rod (207) is hinged to the lower side of the nozzle (205). The outside of the conveying platform (1) is fixedly connected with a water pump (208) used in conjunction with the water pipe (202). The inside of the water storage tank (6) is provided with a filter (209) used in conjunction with the water pipe (202). The nozzles (205) on both sides of the inside of the protective cover (5) are arranged in a staggered manner in front and back.

3. The surface cleaning device for steel fire doors according to claim 1, characterized in that: The rotating shaft of the eccentric rotating brush plate (303) extends to the inside of the installation box (302), and both sides of the lower end of the inside of the installation box (302) are rotatably connected to driven gears (307). Two mutually meshing driving gears (308) are arranged on the lower side of the inside of the installation box (302), and the driving gear (308) and the driven gear (307) are meshed. A brushing motor (309) is fixedly connected to one side of the upper end of the outside of the installation box (302), and the output end of the lower end of the brushing motor (309) is fixedly connected to the rotating shaft of the driving gear (308).

4. The steel fire door surface cleaning device according to claim 3, characterized in that: An adjusting screw (310) is fixedly connected to the middle of the lower side of the extrusion control plate (304), and the lower end of the adjusting screw (310) extends to the middle of the lower side of the lifting connection plate (301). An adjusting nut (311) threadedly connected to the adjusting screw (310) is rotatably connected to the middle of the lower side of the lifting connection plate (301). A brushing adjusting cylinder (312) is fixedly connected to the middle of the upper end of the protective cover (5), and the output end of the lower end of the brushing adjusting cylinder (312) is fixedly connected to the middle of the upper side of the extrusion control plate (304).

5. The steel fire door surface cleaning device according to claim 1, characterized in that: The inner center of the flip mounting plate (402) is rotatably connected to a connecting circular plate (403); the sides of the flip mounting plates (402) that are away from each other are fixedly connected to a flip motor mounting plate (404); the middle parts of the sides of the connecting circular plates (403) that are close to each other are fixedly connected to a synchronous telescopic electric cylinder (405); the four corners of the outside of the immersion box (7) are provided with linkage cylinders (406); the output end of the upper end of the linkage cylinder (406) is fixedly connected to the ears at the four corners of the lifting carrier plate (8); and the ends of the synchronous telescopic electric cylinders (405) that are close to each other are provided with clamping components (9).

6. The steel fire door surface cleaning device according to claim 5, characterized in that: The clamping assembly (9) comprises a clamping arm (901) fixedly connected to one end of the synchronous telescopic electric cylinder (405) close to each other, the front and rear sides of the clamping arm (901) away from each other are fixedly connected to a limiting rod (902), the other end of the limiting rod (902) connected to the clamping arm (901) passes through the side of the connecting circular plate (403) away from each other, the upper surface of the clamping arm (901) and the upper surface of the lifting carrier plate (8) are parallel to each other, the lower side of the clamping arm (901) is fixedly connected to an anti-slip pad (903), the upper end of the clamping arm (901) is fixedly connected to a clamping electric cylinder (904), and the output end of the clamping electric cylinder (904) passes through the inside of the clamping arm (901).

7. The steel fire door surface cleaning device according to claim 5, characterized in that: The front and rear ends of the base of the lifting cylinder (401) are fixedly connected with guide sleeves (407), and the front and rear ends of the lower end of the flip mounting plate (402) are fixedly connected with guide rods (408), and the guide rods (408) are inserted into the guide sleeves (407); The flip motor (409) is fixedly connected to the side of the flip motor mounting plate (404) that is away from each other. The flip motor (409) rotates 180 degrees once. The output end of the flip motor (409) is fixedly connected to the rotating shaft on the side of the connecting circular plate (403) that is away from each other.

8. The steel fire door surface cleaning device according to claim 1, characterized in that: A plurality of evenly distributed rubber protective baffles (10) are fixedly connected to the front and rear upper ends of the protective cover (5); the upper surface of the lifting plate (8) is tilted backwards; water leakage slots (11) are provided at the front and rear upper ends of the lifting plate (8); operating slots (12) are provided on both sides of the upper end of the lifting plate (8); central auxiliary baffles (13) used in conjunction with the operating slots (12) are fixedly connected to both sides of the immersion box (7); and an ultrasonic generator (14) is provided on the lower side of the outside of the immersion box (7).

9. A method for using the steel fire door surface cleaning device according to any one of claims 1 to 8, characterized in that: The following steps are involved: The distance between the lifting connection plate (301) and the extrusion control plate (304) in the scrubbing mechanism (3) is adjusted according to the thickness of the steel door; Arrange the conveying platform (1) and the soaking box (7) according to the cleaning requirements; The steel fire door is placed in a central position on the conveying platform (1) and transported backwards for cleaning and turning over.

10. The method of use according to claim 9, characterized in that: The arrangement of the conveying platform (1) and the soaking box (7) comprises: arranging the two conveying platforms (1) and the two soaking boxes (7) in a front-to-back alternating manner, after the conveying platform (1) is rinsed and scrubbed, it is then sent to the soaking box (7) behind for ultrasonic vibration cleaning, and turned over, and then the steel fire door is continuously transported backwards and enters the next conveying platform (1), and the other side of the steel fire door is rinsed, scrubbed and ultrasonically vibrated for cleaning; The arrangement of the conveying platform (1) and the soaking box (7) also includes: providing a plurality of conveying platforms (1) and two soaking boxes (7) arranged alternately, the two conveying platforms (1) and the two soaking boxes (7) forming a group, the cleaning liquid contained in the water storage tank (6) at the lower end of each group of conveying platforms (1) being the same, and other different cleaning liquids being contained in the water storage tank (6) at the rear, and the distance between the lifting connection plate (301) and the extrusion control plate (304) on each group of conveying platforms (1) being adjusted from front to back in a trend of gradually approaching each other.

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