Fabricated construction safety management system based on BIM technology

Abstract

The invention discloses a fabricated construction safety management system based on a BIM technology, and relates to the technical field of BIM building engineering application. The fabricated construction safety management system based on the BIM technology comprises the following steps that firstly, on the basis of BIM safety information, in combination with the actual situation of a construction site collected by scanning equipment, Revit software is used for monitoring on-site mechanical equipment; a device used by an assembly type construction safety management system based on the BIM technology comprises a bottom frame, an L-shaped plate is fixedly connected to the position, close to the center of one side, of the top end of the bottom frame, and a controller is fixedly connected to the position, close to the corner, of the side end of the bottom frame; according to the three-dimensional laser scanner, through operation of a second motor, under mutual cooperation of a second spray head, a scanning assembly, a first gear, a second gear, a scraping plate and cleaning cotton, the problem that the three-dimensional laser scanner cannot be protected and subjected to dust removal after being used for a period of time due to the fact that dust on a construction site is large is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of BIM construction engineering application, and in particular to an assembly construction safety management system based on BIM technology. Background Art

[0002] BIM (Building Information Modeling) technology is a digital tool used in engineering design, construction, and management. By integrating the digital and information models of buildings, it is shared and transmitted throughout the entire life cycle of project planning, operation, and maintenance, enabling engineering and technical personnel to correctly understand and efficiently respond to various building information, providing a basis for collaborative work for the design team and all parties involved in the construction, including construction and operation units, and playing an important role in improving production efficiency, saving costs, and shortening construction periods. With the gradual implementation of urban renewal policies and urban renewal actions across the country, the upgrading and renovation of old buildings in cities has gradually become a focus of promoting high-quality urban development. In the process of upgrading and renovating old buildings, more prefabricated building components need to be used on site. At present, the traditional RFID (radio frequency identification system) applied to BIM model technology can only complete information recording, but cannot complete the scanning of prefabricated building components to be assembled on the construction site, that is, the information of the scanned prefabricated building components is fed back to the BIM model system for pre-matching and intuitive management and recording of the construction progress. The safety management of existing BIM technology requires the use of scanners to scan and collect on-site building components, but the installation positions of some scanners are relatively fixed. When the scanning height deviates and needs to be adjusted, personnel are required to loosen and adjust the installation locking nut and adjust the position at the vertical connection part. The operation is cumbersome and laborious, and the adjustment convenience is not ideal. At the same time, the construction site is dusty. After the scanner has been used for a period of time, the three-dimensional laser scanner cannot be protected and dusted, and the safety and stability of use are not ideal. In response to the above problems, the inventor proposes an assembled construction safety management system based on BIM technology to solve the above problems. Summary of the invention

[0003] In order to solve the problem that when the scanning height deviates and needs to be adjusted, personnel need to loosen and adjust the installation locking position, and there is a lot of dust on the construction site, and the scanner cannot be protected and dusted after being used for a period of time; the purpose of the present invention is to provide an assembled construction safety management system based on BIM technology.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a prefabricated construction safety management system based on BIM technology, comprising the following steps: S1: First, based on BIM safety information and combined with the actual construction site conditions collected by scanning equipment, Revit software is used to draw the construction of the three-dimensional model of on-site mechanical equipment, component stacking, tower crane operation range, etc., and the modeling software of BIM technology is used to realize the construction of the three-dimensional model, and finally the BIM site plan is formed and imported into the Fuzor software; S2: Then, based on the three-dimensional model, the BIM information integration layer is further constructed. The information models involved in the case project mainly include site planning information model, safety risk information model, etc. S3: Finally, various BIM technologies are used to achieve safety management of the construction site to effectively avoid blind spots, omissions and inefficiency of traditional safety management, complete the BIM technology safety management process, and carry out dynamic ESH management of construction site planning, edge protection safety and overall planning of safety signs according to different stages.

[0005] A device used in an assembled construction safety management system based on BIM technology includes a base frame, an L-shaped plate is fixedly connected to the top of the base frame near the center of one side, a controller is fixedly connected to the side end of the base frame near the corner, a protective component is fixedly connected to the center of the top of the L-shaped plate, and a scanning component is slidably connected to the front end of the L-shaped plate.

[0006] Preferably, the protective assembly includes a protective plate, and the bottom end of the protective plate is fixedly connected to the L-shaped plate, the top center of the L-shaped plate is rotatably connected to bevel gear 2, the top of the L-shaped plate and near the center is fixedly connected to motor 1, the output end of motor 1 is fixedly connected to bevel gear 1, and bevel gear 1 is meshed with bevel gear 2.

[0007] Preferably, a collecting plate is fixedly connected to the center of the top end of the L-shaped plate, and a drain pipe is fixedly connected to the outer ring of the collecting plate, a liquid storage barrel is fixedly connected to the center of the bottom end of the protective plate, and the liquid storage barrel is at the same level as the bevel gear two, a liquid injection pipe is fixedly connected to the outer ring of the liquid storage barrel near the top, a plurality of nozzles one are fixedly connected to the bottom end of the liquid storage barrel near the center, and the plurality of nozzles one are distributed in a ring shape, a cross slide bar is rotatably connected to the center of the bottom end of the L-shaped plate, and the top end of the cross slide bar passes through the L-shaped plate and is fixedly connected to the bevel gear two, and a cross sleeve is slidably connected to the outer ring of the cross slide bar.

[0008] Preferably, the scanning assembly includes a sliding plate, and the sliding plate is slidably connected to the L-shaped plate, a telescopic guide shaft is fixedly connected to the bottom end of the L-shaped plate and near the center of one side, and the bottom end of the telescopic guide shaft is fixedly connected to the sliding plate, an electric cylinder is fixedly connected to the top end of the L-shaped plate and near the center of the other side, and the output end of the electric cylinder passes through the L-shaped plate and is fixedly connected to the sliding plate.

[0009] Preferably, a rotating frame is rotatably connected to the center of the bottom end of the sliding plate, and the bottom end of the cross sleeve passes through the sliding plate and is fixedly connected to the rotating frame, a mounting box is fixedly connected to the bottom end of the rotating frame, a collection scanning head body is fixedly connected to the center of the mounting box, a water storage bucket is fixedly connected to the top of the sliding plate and near the center, and a water inlet is provided at the top of the water storage bucket.

[0010] Preferably, the front end of the rotating frame is fixedly connected to a water box, the bottom end of the water box is fixedly connected to a plurality of nozzles 2, and the plurality of nozzles 2 are evenly distributed, the bottom end of the water storage barrel is fixedly connected to a water pipe, and the other end of the water pipe is fixedly connected to the water box, a scraper plate is rotatably connected to the front end center of the mounting box and close to the bottom, a cleaning cotton is fixedly connected to one end of the scraper plate close to the mounting box, and the cleaning cotton is in contact with the mounting box, a first gear is fixedly connected to the front end of the scraper plate and close to the bottom, a transmission box is fixedly connected to the bottom end of the mounting box, a second gear is rotatably connected to the front end of the transmission box and close to the first gear, and the second gear is meshed with the first gear.

[0011] Preferably, a long shaft is rotatably connected between the inner walls of the transmission box near the center, and the front end of the long shaft passes through the transmission box and is fixedly connected to the second gear, a convex plate is fixedly connected to the outer ring of the long shaft near the center, a short shaft one is fixedly connected to the front end of the convex plate near the top center, a worm gear is rotatably connected to the inner wall of the transmission box near the long shaft, a short plate is fixedly connected at the front end center of the worm gear, a short shaft two is fixedly connected to the front end of the short plate near the top center, a connecting rod is rotatably connected between short shaft two and the outer ring of short shaft one, a worm is rotatably connected to the side wall of the transmission box, and the worm is meshed with the worm wheel, a motor two is fixedly connected to the side end of the transmission box, and the output end of the motor two passes through the transmission box and is fixedly connected to the worm.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention combines BIM technology with the prefabricated construction safety management system to more intuitively reflect the actual safety management situation on site. According to the three-dimensional model, it is very easy to find places where risks are likely to occur. These provide a factual basis for safety managers to make corresponding deployments. Combined with BIM technology, the corresponding risk protection places and the time required for demolition are calculated to avoid long installation time and waste of resources. In addition, it can better intuitively control the safety of the site, allocate materials on site, reduce management costs, and improve the predictability of management. 2. In the present invention, the electric cylinder is operated, and then the protective component, bevel gear 1, bevel gear 2, and rotating frame cooperate with each other to achieve the effect of adjusting the height of the acquisition scanning head body, thereby solving the problem that when the scanning height deviation needs to be adjusted, the person needs to loosen and adjust the installation locking nut; 3. The present invention solves the problem of large dust on the construction site and the inability to protect and clean the three-dimensional laser scanner after the scanner has been used for a period of time by running motor 2, and then cooperating between nozzle 2 and scanning assembly as well as the first gear, the second gear, the scraper plate, and the cleaning cotton. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only 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.

[0014] Figure 1 It is a schematic diagram of the system structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the overall structure of the device of the present invention.

[0016] Figure 3 It is a schematic diagram of the L-shaped plate structure of the present invention.

[0017] Figure 4 It is a schematic diagram of the sliding plate structure of the present invention.

[0018] Figure 5 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0019] Figure 6 For the present invention Figure 4 Enlarged structural diagram at B in the middle.

[0020] Figure 7 For the present invention Figure 4 Enlarged structural diagram at point C in the middle.

[0021] In the figure: 1, chassis; 101, L-shaped plate; 102, controller; 2, protection assembly; 201, protection plate; 202, motor 1; 203, bevel gear 1; 204, bevel gear 2; 205, collection plate; 206, liquid storage barrel; 207, nozzle 1; 208, cross slide; 209, cross sleeve; 3, scanning assembly; 301, sliding plate; 302, telescopic guide shaft; 303, electric cylinder; 304, rotating frame; 3 05. Installation box; 307. Collection scanning head body; 308. Water box; 309. Nozzle 2; 310. Water storage bucket; 311. Water pipe; 312. Scraper plate; 313. First gear; 314. Transmission box; 315. Second gear; 316. Long shaft; 317. Convex plate; 318. Short shaft 1; 319. Worm gear; 320. Short plate; 321. Short shaft 2; 322. Connecting rod; 323. Worm; 324. Motor 2. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in 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.

[0023] Example: Figure 1-7 As shown, the present invention provides a technical solution: a prefabricated construction safety management system based on BIM technology, comprising the following steps: S1: First, based on BIM safety information and combined with the actual construction site conditions collected by scanning equipment, Revit software is used to draw the construction of the three-dimensional model of on-site mechanical equipment, component stacking, tower crane operation range, etc., and the modeling software of BIM technology is used to realize the construction of the three-dimensional model, and finally the BIM site plan is formed and imported into the Fuzor software; S2: Then, based on the three-dimensional model, the BIM information integration layer is further constructed. The information models involved in the case project mainly include site planning information model, safety risk information model, etc. S3: Finally, various BIM technologies are used to achieve safety management of the construction site to effectively avoid blind spots, omissions and inefficiency of traditional safety management, complete the BIM technology safety management process, and carry out dynamic ESH management of construction site planning, edge protection safety and overall planning of safety signs according to different stages.

[0024] A device used in an assembled construction safety management system based on BIM technology includes a base frame 1, an L-shaped plate 101 is fixedly connected to the top of the base frame 1 near the center of one side, a controller 102 is fixedly connected to the side end of the base frame 1 near the corner, a protection component 2 is fixedly connected to the top center of the L-shaped plate 101, and a scanning component 3 is slidably connected to the front end of the L-shaped plate 101.

[0025] The protection component 2 includes a protection plate 201, and the bottom end of the protection plate 201 is fixedly connected to the L-shaped plate 101, and a bevel gear 204 is rotatably connected to the center of the top end of the L-shaped plate 101. A motor 202 is fixedly connected to the top of the L-shaped plate 101 and close to the center, and a bevel gear 203 is fixedly connected to the output end of the motor 202, and the bevel gear 203 is meshed with the bevel gear 204.

[0026] By adopting the above technical solution, the motor 1 202 is operated, so that the fixedly connected bevel gear 1 203 is rotated, thereby the meshingly connected bevel gear 2 204 is rotated.

[0027] A collecting plate 205 is fixedly connected at the center of the top end of the L-shaped plate 101, and a drain pipe is fixedly connected to the outer ring of the collecting plate 205; a liquid storage barrel 206 is fixedly connected at the center of the bottom end of the protective plate 201, and the liquid storage barrel 206 is at the same level as the bevel gear 204; a liquid injection pipe is fixedly connected to the outer ring of the liquid storage barrel 206 and near the top; a plurality of nozzles 207 are fixedly connected to the bottom end of the liquid storage barrel 206 near the center, and the plurality of nozzles 207 are distributed in a ring shape; a cross slide bar 208 is rotatably connected to the center of the bottom end of the L-shaped plate 101, and the top end of the cross slide bar 208 passes through the L-shaped plate 101 and is fixedly connected to the bevel gear 204; a cross sleeve 209 is slidably connected to the outer ring of the cross slide bar 208.

[0028] By adopting the above technical solution, the bevel gear 204 rotates, and then the rotating frame 304 can be rotated under the action of the cross slide 208 and the cross sleeve 209. The cross slide 208 and the cross sleeve 209 are provided so as not to hinder the rotation of the rotating frame 304 after lifting.

[0029] The scanning component 3 includes a sliding plate 301, and the sliding plate 301 is slidably connected to the L-shaped plate 101. A telescopic guide shaft 302 is fixedly connected to the bottom end of the L-shaped plate 101 and near the center of one side, and the bottom end of the telescopic guide shaft 302 is fixedly connected to the sliding plate 301. An electric cylinder 303 is fixedly connected to the top end of the L-shaped plate 101 and near the center of the other side. The output end of the electric cylinder 303 passes through the L-shaped plate 101 and is fixedly connected to the sliding plate 301.

[0030] By adopting the above technical solution, the electric cylinder 303 is operated, so that the fixedly connected sliding plate 301 is lifted and lowered under the action of the L-shaped plate 101 and the telescopic guide shaft 302 .

[0031] A rotating frame 304 is rotatably connected at the center of the bottom end of the sliding plate 301, and the bottom end of the cross sleeve 209 passes through the sliding plate 301 and is fixedly connected to the rotating frame 304. A mounting box 305 is fixedly connected to the bottom end of the rotating frame 304, and a collection scanning head body 307 is fixedly connected to the center of the mounting box 305. A water storage barrel 310 is fixedly connected to the top of the sliding plate 301 and near the center, and a water inlet is provided at the top of the water storage barrel 310.

[0032] By adopting the above technical solution, the installation box 305 is provided to install the acquisition scanning head body 307 , and the cross sleeve 209 can drive the fixedly connected rotating frame 304 to rotate, so as to achieve the effect of adjusting the angle of the installation box 305 .

[0033] A water box 308 is fixedly connected to the front end of the rotating frame 304, and a plurality of nozzles 309 are fixedly connected to the bottom end of the water box 308, and the plurality of nozzles 309 are evenly distributed. A water pipe 311 is fixedly connected to the bottom end of the water storage barrel 310, and the other end of the water pipe 311 is fixedly connected to the water box 308. A scraper plate 312 is rotatably connected to the front center of the installation box 305 and near the bottom. A cleaning cotton is fixedly connected to one end of the scraper plate 312 near the installation box 305, and the cleaning cotton is in contact with the installation box 305. A first gear 313 is fixedly connected to the front end of the scraper plate 312 and near the bottom. A transmission box 314 is fixedly connected to the bottom end of the installation box 305. A second gear 315 is rotatably connected to the front end of the transmission box 314 and near the first gear 313, and the second gear 315 meshes with the first gear 313.

[0034] By adopting the above technical solution, several nozzles 309 are installed at an angle, which is convenient for spraying cleaning liquid to the front end of the installation box 305, and then cooperate with the scraper plate 312 and cleaning cotton to achieve the effect of cleaning the front end of the installation box 305.

[0035] A long shaft 316 is rotatably connected between the inner walls of the transmission box 314 near the center, and the front end of the long shaft 316 penetrates the transmission box 314 and is fixedly connected to the second gear 315, a convex plate 317 is fixedly connected to the outer circle of the long shaft 316 near the center, a short shaft 1 318 is fixedly connected to the front end of the convex plate 317 near the top center, a worm gear 319 is rotatably connected to the inner wall of the transmission box 314 near the long shaft 316, a short plate 320 is fixedly connected to the front end center of the worm gear 319, a short shaft 2 321 is fixedly connected to the front end of the short plate 320 near the top center, a connecting rod 322 is rotatably connected between the short shaft 2 321 and the outer circle of the short shaft 1 318, a worm 323 is rotatably connected to the side wall of the transmission box 314, and the worm 323 is meshed with the worm wheel 319, a motor 2 324 is fixedly connected to the side end of the transmission box 314, and the output end of the motor 2 324 penetrates the transmission box 314 and is fixedly connected to the worm 323.

[0036] By adopting the above technical solution, the second motor 324 is operated, so that the fixedly connected worm 323 rotates, and the worm wheel 319 meshingly connected therewith rotates.

[0037] Working principle: When the device is in use, firstly, lubricating oil is added to the liquid storage barrel 206, and then cleaning liquid is added to the water storage barrel 310. When the height of the acquisition scanning head body 307 needs to be adjusted, the electric cylinder 303 is operated so that the fixedly connected sliding plate 301 is lifted and lowered under the action of the L-shaped plate 101 and the telescopic guide shaft 302, thereby achieving the effect of adjusting the height of the acquisition scanning head body 307. Then, the motor 1 202 is operated so that the fixedly connected bevel gear 1 203 is rotated, which can make the meshing bevel gear 2 204 rotate. Then, under the action of the cross slide bar 208 and the cross sleeve 209, the rotating frame 304 drives the acquisition scanning head body 307 to rotate, thereby achieving the effect of adjusting the angle of the acquisition scanning head body 307, thereby solving the problem that when the scanning height deviation needs to be adjusted, the person needs to loosen and adjust the installation locking nut. When the acquisition scanning head body 307 cannot work normally due to dust on the front end of the installation box 305, first open the multiple nozzles 2 309, and then under the action of the water pipe 311, the cleaning liquid is sprayed to the front end of the installation box 305, and then the motor 2 324 is operated, so that the fixed worm 323 is rotated, thereby the meshing worm wheel 319 drives the short plate 320 to rotate, and then the long shaft 316 drives the second gear 315 to reciprocate under the mutual cooperation between the short shaft 1 318 and the short shaft 2 321 and the connecting rod 322 and the convex plate 317. The first gear 313 meshing with it will drive the scraper plate 312 to reciprocate, and then under the action of the cleaning cotton, the front end of the installation box 305 can be cleaned, wherein by opening multiple nozzles 207, the lubricating oil can be sprayed onto the bevel gear 1 203 and the bevel gear 2 204, so as to achieve the effect of lubricating the bevel gear 1 203 and the bevel gear 2 204, thereby reducing the friction and wear between them and extending the service life, thereby solving the problem that the construction site is dusty and the scanner cannot be protected and dust-cleaned after being used for a period of time.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A prefabricated construction safety management system based on BIM technology, characterized in that: The following steps are involved: S1: First, based on BIM safety information and combined with the actual construction site conditions collected by scanning equipment, Revit software is used to draw the construction of the three-dimensional model of on-site mechanical equipment, component stacking, tower crane operation range, etc., and the modeling software of BIM technology is used to realize the construction of the three-dimensional model, and finally the BIM site plan is formed and imported into the Fuzor software; S2: Then, based on the three-dimensional model, the BIM information integration layer is further constructed. The information models involved in the case project mainly include site planning information model, safety risk information model, etc. S3: Finally, various BIM technologies are used to achieve safety management of the construction site to effectively avoid blind spots, omissions and inefficiency of traditional safety management, complete the BIM technology safety management process, and carry out dynamic ESH management of construction site planning, edge protection safety and overall planning of safety signs according to different stages.

2. A device used in a BIM-based prefabricated construction safety management system as claimed in claim 1, comprising a base frame (1), characterized in that: An L-shaped plate (101) is fixedly connected to the top of the base frame (1) near the center of one side, a controller (102) is fixedly connected to the side end of the base frame (1) near the corner, a protection component (2) is fixedly connected to the top center of the L-shaped plate (101), and a scanning component (3) is slidably connected to the front end of the L-shaped plate (101).

3. The device used in the BIM-based prefabricated construction safety management system according to claim 2, characterized in that: The protection assembly (2) comprises a protection plate (201), wherein the bottom end of the protection plate (201) is fixedly connected to the L-shaped plate (101), the top center of the L-shaped plate (101) is rotatably connected to a bevel gear 2 (204), the top of the L-shaped plate (101) and close to the center is fixedly connected to a motor 1 (202), the output end of the motor 1 (202) is fixedly connected to a bevel gear 1 (203), and the bevel gear 1 (203) is meshed with the bevel gear 2 (204).

4. The device used in the BIM-based prefabricated construction safety management system according to claim 3, characterized in that: A collecting plate (205) is fixedly connected to the center of the top of the L-shaped plate (101), and a liquid discharge pipe is fixedly connected to the outer ring of the collecting plate (205); a liquid storage barrel (206) is fixedly connected to the center of the bottom of the protective plate (201), and the liquid storage barrel (206) is at the same level as the bevel gear 2 (204); a liquid injection pipe is fixedly connected to the outer ring of the liquid storage barrel (206) and near the top; a plurality of nozzles (207) are fixedly connected to the bottom of the liquid storage barrel (206) near the center, and the plurality of nozzles (207) are distributed in a ring shape; a cross slide bar (208) is rotatably connected to the center of the bottom of the L-shaped plate (101), and the top of the cross slide bar (208) passes through the L-shaped plate (101) and is fixedly connected to the bevel gear 2 (204); and a cross sleeve (209) is slidably connected to the outer ring of the cross slide bar (208).

5. The device used in the BIM-based prefabricated construction safety management system according to claim 4, characterized in that: The scanning assembly (3) comprises a sliding plate (301), and the sliding plate (301) is slidably connected to the L-shaped plate (101); a telescopic guide shaft (302) is fixedly connected at the bottom end of the L-shaped plate (101) and close to the center of one side, and the bottom end of the telescopic guide shaft (302) is fixedly connected to the sliding plate (301); an electric cylinder (303) is fixedly connected at the top end of the L-shaped plate (101) and close to the center of the other side, and an output end of the electric cylinder (303) passes through the L-shaped plate (101) and is fixedly connected to the sliding plate (301).

6. The device used in the BIM-based prefabricated construction safety management system according to claim 5, characterized in that: The sliding plate (301) is rotatably connected to a rotating frame (304) at the center of the bottom end, and the bottom end of the cross sleeve (209) passes through the sliding plate (301) and is fixedly connected to the rotating frame (304). The bottom end of the rotating frame (304) is fixedly connected to a mounting box (305), and the center of the mounting box (305) is fixedly connected to a collection scanning head body (307). The top of the sliding plate (301) and near the center is fixedly connected to a water storage bucket (310), and a water inlet is provided at the top of the water storage bucket (310).

7. The device used in the BIM-based prefabricated construction safety management system according to claim 6, characterized in that: The front end of the rotating frame (304) is fixedly connected to a water box (308), the bottom end of the water box (308) is fixedly connected to a plurality of second nozzles (309), and the plurality of second nozzles (309) are evenly distributed. The bottom end of the water storage barrel (310) is fixedly connected to a water pipe (311), and the other end of the water pipe (311) is fixedly connected to the water box (308). A scraper plate (312) is rotatably connected to the center of the front end of the installation box (305) and close to the bottom. The scraper plate (312) is rotatably connected to the installation box (305). 2) A cleaning cotton is fixedly connected to one end near the installation box (305), and the cleaning cotton is in contact with the installation box (305); a first gear (313) is fixedly connected to the front end of the scraper plate (312) and near the bottom; a transmission box (314) is fixedly connected to the bottom end of the installation box (305); a second gear (315) is rotatably connected to the front end of the transmission box (314) and near the first gear (313), and the second gear (315) is meshed with the first gear (313).

8. The device used in the BIM-based prefabricated construction safety management system according to claim 7, characterized in that: A long shaft (316) is rotatably connected between the inner walls of the transmission box (314) near the center, and the front end of the long shaft (316) penetrates the transmission box (314) and is fixedly connected to the second gear (315). A convex plate (317) is fixedly connected to the outer ring of the long shaft (316) near the center, and a short shaft (318) is fixedly connected to the front end of the convex plate (317) near the top center. A worm gear (319) is rotatably connected to the inner wall of the transmission box (314) near the long shaft (316), and the front end center of the worm gear (319) is fixedly connected to the second gear (315). A short plate (320) is connected, and a short shaft 2 (321) is fixedly connected to the front end of the short plate (320) near the top center, and a connecting rod (322) is rotatably connected between the outer rings of the short shaft 2 (321) and the short shaft 1 (318), and a worm (323) is rotatably connected to the side wall of the transmission box (314), and the worm (323) is meshed with the worm wheel (319), and a motor 2 (324) is fixedly connected to the side end of the transmission box (314), and the output end of the motor 2 (324) passes through the transmission box (314) and is fixedly connected to the worm (323).

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