A bim-based construction project management device

Abstract

The application relates to a BIM-based building engineering management device and relates to the technical field of building informatization equipment, which comprises a counterweight box, the upper surface of the counterweight box is vertically fixed with two stand columns, the top ends of the two stand columns are fixed with the same rain shelter, the front sides of the two stand columns are fixed with BIM management screens through bolts, and the outer sides of the two stand columns are fixed with two base plates which are located above and below the BIM management screens and are both in horizontal shapes. The BIM-based building engineering management device drives two sets of functional mechanisms through the left and right output shafts of a double-shaft motor, realizes the cooperative linkage of dust falling, cleaning and protection, the left output shaft drives the liquid pipe and the atomizing nozzle to rotate, the screen surface can be uniformly humidified before being cleaned, and the surrounding environment can be sprayed and dusted at the same time, so that the adhesion of flying dust is effectively inhibited; the right output shaft drives the movable rod and the pull rope to control the up-down movement of the pull plate, so that the cleaning cotton fixed on the pull plate reciprocally wipes the screen surface, and efficient cleaning is completed.

Description

Technical Field

[0001] This invention relates to the field of building information technology equipment, specifically a building engineering management device based on BIM. Background Technology

[0002] In modern intelligent construction systems, BIM (Building Information Modeling)-based building project management devices have become important terminal equipment for realizing digital, visual, and collaborative management of construction sites. These devices are typically deployed in outdoor environments such as construction sites. Their core function is to provide managers and construction workers with a real-time visual interactive interface for project progress, component information, quality and safety tasks by integrating BIM model data. The main structure of the device generally includes a high-brightness, weather-resistant BIM management display screen, which is used to display 3D models, construction drawings, and management instructions. It is a key human-machine interface connecting the digital model and the physical construction site.

[0003] In existing technologies, BIM-based building management devices have been widely used. These devices are typically equipped with high-resolution management displays that can show BIM models and related construction information in real time. By connecting with sensors and monitoring equipment at the construction site, these devices can achieve real-time monitoring and data collection on various aspects such as construction progress, quality, and safety. In addition, some devices also have remote access capabilities, allowing managers to view real-time information about the construction site at any time via mobile devices or remote terminals, thereby enabling remote management and collaborative work. However, despite the relatively complete functionality of existing technologies, there are still some shortcomings in practical applications.

[0004] Currently, some BIM-based site management terminals have been applied in actual projects. These devices mostly use fixed brackets to install the display screen on columns or fences and are equipped with rain shelters to cope with outdoor weather. Some products also integrate touch interaction, wireless communication and simple protective covers to improve the usability of the equipment in dusty, rainy and strong light environments. However, existing designs generally focus on hardware reinforcement and basic display functions, and lack systematic solutions to problems such as pollution, aging and human damage caused by long-term exposure of the screen.

[0005] Therefore, although existing technologies have achieved on-site visualization of BIM information to some extent, there are still significant shortcomings: BIM management displays are exposed to the outdoors for a long time, which makes them prone to accumulating dust, mud, or being washed away by rain, resulting in a serious decrease in screen visibility; at the same time, there is a lack of effective automatic cleaning mechanisms, relying on manual wiping, which is costly and untimely; more importantly, when the device is not in use, the screen cannot be automatically retracted or covered, which not only accelerates the aging of the equipment, but also poses a risk of malicious damage or accidental collision. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a BIM-based building engineering management device that features automatic screen cleaning, dust and sun protection, rainwater recycling, and air curtain dust prevention. It solves the problems of screen dust accumulation, poor visibility, easy aging, and lack of active protection caused by long-term outdoor exposure of existing BIM management terminals.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a BIM-based building engineering management device, including a counterweight box, two columns vertically fixed on the upper surface of the counterweight box, the same rain shelter fixed at the top of the two columns, a BIM management screen fixed to the front side of the two columns by bolts, and two base plates fixed on the outer side of the two columns respectively located above and below the BIM management screen and both being horizontal.

[0008] The two base plates are equipped with shielding mechanisms for protecting the BIM management screen, and the counterweight box is equipped with an auxiliary mechanism to assist the shielding mechanisms in protecting the BIM management screen. The shielding mechanisms include the following specific features:

[0009] Dual-axis motor: It is fixed to the lower surface of the upper substrate;

[0010] Liquid pipe: It is rotatably connected to the lower surface of the upper base plate through a bearing seat, and is connected to the left output shaft of the dual-axis motor through belt drive;

[0011] Atomizing nozzles: There shall be no fewer than two of them, and they shall be equidistantly connected and fixed to one side of the liquid pipe;

[0012] Water pump: It is fixed to the upper surface of the counterweight box, and the input end is connected and fixed to the upper surface of the counterweight box;

[0013] Water outlet pipe: One end of it is fixedly connected to the water outlet of the water pump, and the other end is rotatably connected to the right end of the liquid pipe through a sealed bearing.

[0014] Movable rod: It is rotatably connected to the upper side of the upper base plate through two bearing seats, and is connected to the right output shaft of the dual-axis motor via belt drive.

[0015] Pull ropes: There are two of them, which are symmetrically wrapped around the left and right sides of the outer surface of the movable rod;

[0016] Pull plate: Its top surface is fixed to the other ends of the two pull ropes;

[0017] Dustproof cloth: It is fixed between the lower base plate and the opposite side of the pull plate.

[0018] Furthermore, the output shafts at both ends of the dual-axis motor are connected to the liquid pipe and the movable rod respectively via belts and pulleys.

[0019] Furthermore, the length of the movable rod is greater than the length of the liquid pipe, and the horizontal height of the movable rod is higher than the horizontal height of the liquid pipe, while the two are arranged parallel to each other.

[0020] Furthermore, the dustproof cloth is located on the front side of the BIM management screen, and the pull plate moves linearly up and down on the front side of the BIM management screen, and the dustproof cloth is expanded and contracted through the linear movement of the pull plate.

[0021] Furthermore, the shielding mechanism also includes two side plates fixed between the opposite sides of the two substrates. Each of the two side plates has a sliding groove on its opposite side. The pull plate is slidably connected to the side plate through the sliding groove. A cleaning cotton is fixed on the side of the pull plate near the BIM management screen.

[0022] Furthermore, the auxiliary mechanism includes water inlet pipes connected and fixed to the left and right sides of the upper surface of the counterweight box. The top ends of the two water inlet pipes are fixedly connected to collection hoppers. The interiors of the two collection hoppers are fixedly fitted with horizontally shaped filter screens. The front of the counterweight box is fixedly fitted with an air duct. The interior of the air duct is fixedly fitted with two dustproof screens and two fans. The center of the air duct is fixedly fitted with a guide platform. The center of the upper surface of the air duct is fixedly connected to a connecting pipe. The other end of the connecting pipe is connected to a horizontal pipe.

[0023] Furthermore, the auxiliary mechanism also includes multiple air outlets that are equidistantly distributed on the upper surface of the horizontal tube and are fixedly connected to it, and the airflow from the air outlets envelops the BIM management screen.

[0024] Furthermore, the two dustproof nets are located near the two side ports of the air duct, and the left and right sides of the guide platform are both arc-shaped and face the direction of the connecting pipe.

[0025] Furthermore, the longitudinal section of the horizontal tube is U-shaped, and the horizontal distance between its two ends is less than the length of the counterweight box.

[0026] Furthermore, the counterweight box stores rainwater filtered through the inlet pipe and the collection hopper. The input end of the water pump is connected to the bottom of the counterweight box to draw the stored water and deliver it to the atomizing nozzle through the outlet pipe and the liquid pipe.

[0027] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0028] 1. This BIM-based building engineering management device uses the left and right output shafts of a dual-axis motor to drive two sets of functional mechanisms, achieving coordinated dust suppression, cleaning, and protection. The left output shaft drives the liquid pipe and atomizing nozzle to rotate, which can uniformly humidify the screen surface before cleaning and simultaneously spray dust into the surrounding environment, effectively suppressing dust adhesion. The right output shaft controls the up and down movement of the pull plate through a movable rod and pull rope, allowing the cleaning cotton fixed on it to wipe the screen surface back and forth for efficient cleaning. When the pull plate is raised to the top, the dustproof cloth is fully unfolded, covering the front of the BIM management screen, providing reliable dust protection, sunshade, and physical protection when the equipment is not in use, significantly extending the service life of the display screen in harsh outdoor environments.

[0029] 2. This BIM-based building engineering management device, with its auxiliary mechanism featuring a fan, U-shaped horizontal pipe, and air outlet, not only quickly dries the screen after cleaning but also forms a dynamic air wall barrier in front of the screen through its surrounding airflow design. This air wall completely envelops the BIM management screen, effectively blocking the intrusion of external dust, moisture, and pollutants. It is especially suitable for complex construction sites with dust, high humidity, or multiple layers of overlapping operations. Combined with a rainwater collection and filtration system and a self-cleaning mechanism, this device achieves full-cycle intelligent maintenance of "active dust reduction - wet wiping cleaning - air curtain protection," significantly reducing the need for manual intervention and improving the reliability and visualization effect of the BIM terminal during long-term outdoor operation. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the shielding mechanism of the present invention;

[0032] Figure 3 This is a schematic diagram of the auxiliary mechanism of the present invention;

[0033] Figure 4 The side view of the bucket structure is collected for the present invention.

[0034] In the diagram: 1. Counterweight box, 2. Column, 3. Rain shelter, 4. BIM management screen, 5. Base plate, 6. Shielding mechanism, 601. Dual-axis motor, 602. Liquid pipe, 603. Atomizing nozzle, 604. Water pump, 605. Water outlet pipe, 606. Movable rod, 607. Pull rope, 608. Pull plate, 609. Dustproof cloth, 610. Side plate, 7. Auxiliary mechanism, 701. Water inlet pipe, 702. Collection hopper, 703. Filter screen, 704. Air duct, 705. Dustproof net, 706. Fan, 707. Guide platform, 708. Connecting pipe, 709. Horizontal pipe, 710. Air outlet. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1-4 In this embodiment, a BIM-based building engineering management device includes a counterweight box 1. Two columns 2 are vertically fixed on the upper surface of the counterweight box 1. The top of the two columns 2 is fixed with the same rain shelter 3. A BIM management screen 4 is fixed to the front side of the two columns 2 by bolts. Two base plates 5 are fixed on the outside of the two columns 2, which are located above and below the BIM management screen 4 and are both horizontal.

[0037] The two base plates 5 are equipped with shielding mechanisms 6 for protecting the BIM management screen 4, and the counterweight box 1 is equipped with an auxiliary mechanism 7 for assisting the shielding mechanisms 6 in protecting the BIM management screen 4. The shielding mechanism 6 includes the following specific features:

[0038] Dual-axis motor 601: It is fixed to the lower surface of the upper base plate 5;

[0039] Liquid pipe 602: It is rotatably connected to the lower surface of the upper base plate 5 through a bearing seat, and is connected to the left output shaft of the dual-axis motor 601 through belt drive.

[0040] Atomizing nozzles 603: There are no fewer than two of them, and they are all equidistantly connected and fixed to one side of the liquid pipe 602;

[0041] Water pump 604: It is fixed to the upper surface of the counterweight box 1, and its input end is connected and fixed to the upper surface of the counterweight box 1;

[0042] Water outlet pipe 605: One end of it is fixedly connected to the water outlet of water pump 604, and the other end is rotatably connected to the right end of liquid pipe 602 through a sealed bearing.

[0043] Movable rod 606: It is rotatably connected to the upper side of the upper base plate 5 through two bearing seats, and is connected to the right output shaft of the dual-axis motor 601 through belt drive.

[0044] Pull rope 607: There are two of them, which are symmetrically wrapped around the left and right sides of the outer surface of the movable rod 606;

[0045] Pull plate 608: Its top surface is fixed to the other end of the two pull ropes 607;

[0046] Dustproof cloth 609: It is fixed between the lower base plate 5 and the opposite side of the pull plate 608.

[0047] It should be noted that the device is based on a counterweight box 1, on which two vertical columns 2 are installed. The top of the columns 2 is connected to a rain shelter 3. The BIM management screen 4 is fixed to the front side, and horizontal base plates 5 are symmetrically installed on the outer side. A shielding mechanism 6 is provided between the base plates 5, which is driven by a dual-axis motor 601: the left output shaft drives the liquid pipe 602 to rotate through the belt, so that the atomizing nozzle 603 sprays to clean the screen; the right output shaft drives the movable rod 606 to extend and retract the pull rope 607, and controls the lifting and lowering of the pull plate 608, so as to realize the wiping of the cleaning cotton and the unfolding and retraction of the dustproof cloth 609, thereby automatically cleaning and protecting the BIM management screen 4.

[0048] Furthermore, the output shafts at both ends of the dual-axis motor 601 are connected to the liquid pipe 602 and the movable rod 606 respectively via belts and pulleys. The length of the movable rod 606 is greater than the length of the liquid pipe 602, and the horizontal height of the movable rod 606 is higher than the horizontal height of the liquid pipe 602. At the same time, the two are set in parallel.

[0049] It should be noted that the two output shafts of the dual-axis motor 601 are connected to the liquid pipe 602 and the movable rod 606 respectively via belt pulleys. The movable rod 606 is longer than the liquid pipe 602 and is installed at a higher position. The two are arranged in parallel to ensure the synchronous and coordinated operation of the spray cleaning and the dust cover 609 retraction and extension actions in the shielding mechanism 6.

[0050] Furthermore, the dustproof cloth 609 is located on the front side of the BIM management screen 4, and the pull plate 608 moves linearly up and down on the front side of the BIM management screen 4. The dustproof cloth 609 is expanded and contracted through the linear movement of the pull plate 608.

[0051] It should be noted that the dust cover 609 is located on the front side of the BIM management screen 4. The pull plate 608 moves linearly up and down in front of it, which can cause the dust cover 609 to be unfolded to cover or retract, thereby shielding and protecting the screen or exposing it for use.

[0052] Furthermore, the shielding mechanism 6 also includes two side plates 610 fixed between the two substrates 5 on opposite sides. Each of the two side plates 610 has a sliding groove on its opposite side. The pull plate 608 is slidably connected to the side plate 610 through the sliding groove. A cleaning cotton is fixed on the side of the pull plate 608 near the BIM management screen 4.

[0053] It should be noted that the shielding mechanism 6 also includes two side plates 610 fixed between the two substrates 5. The side plates 610 are provided with sliding grooves on their inner sides. The pull plate 608 is slidably connected to the side plates 610 through the sliding grooves. A cleaning cotton is installed on the side of the pull plate 608 that is close to the BIM management screen 4 to ensure that the pull plate 608 can stably and closely wipe and clean the screen when it moves up and down.

[0054] Furthermore, the auxiliary mechanism 7 includes water inlet pipes 701 that are fixed to the left and right sides of the upper surface of the counterweight box 1. The top of each of the two water inlet pipes 701 is fixedly connected to a collection hopper 702. The inside of each of the two collection hoppers 702 is fixedly fitted with a horizontal filter screen 703. The front of the counterweight box 1 is fixedly fitted with an air duct 704. The inside of the air duct 704 is fixedly fitted with two dustproof nets 705 and two fans 706. The center of the air duct 704 is fixedly fitted with a guide platform 707. The center of the upper surface of the air duct 704 is fixedly connected to a connecting pipe 708. The other end of the connecting pipe 708 is fixedly connected to a horizontal pipe 709.

[0055] It should be noted that the auxiliary mechanism 7 includes water inlet pipes 701 located on both sides of the upper surface of the counterweight box 1, with the top end of the pipe connected to a collection hopper 702 with a horizontal filter screen 703 for collecting and filtering rainwater; the front of the counterweight box 1 is provided with an air duct 704, which contains a dustproof net 705, a fan 706 and a central guide platform 707. The air duct 704 is connected to the horizontal pipe 709 above through the connecting pipe 708 at the top, forming an airflow filtration, guidance and distribution system to provide a clean air source for the screen.

[0056] Furthermore, the auxiliary mechanism 7 also includes multiple air outlets 710 that are equidistantly distributed on the upper surface of the horizontal pipe 709 and are fixedly connected to it. The airflow from the air outlets 710 wraps around the BIM management screen 4. Two dustproof nets 705 are located near the two side ports of the air duct 704. The left and right sides of the guide platform 707 are both arc-shaped and face the direction of the connecting pipe 708.

[0057] It should be noted that the auxiliary mechanism 7 also includes multiple air outlets 710 equidistantly arranged on the horizontal pipe 709, whose airflow surrounds and envelops the BIM management screen 4 to form a protective air curtain; dust screens 705 are provided near the ports on both sides of the air duct 704 for air intake filtration, and the guide platform 707 in the center of the interior has arc-shaped surfaces on both sides facing the connecting pipe 708 to efficiently converge and guide the clean airflow upward.

[0058] Furthermore, the longitudinal section of the horizontal tube 709 is U-shaped, and the horizontal distance between the two ends is less than the length of the counterweight box 1. The counterweight box 1 stores rainwater filtered by the water inlet pipe 701 and the collection hopper 702. The input end of the water pump 604 is connected to the bottom of the counterweight box 1 and is used to draw the stored water and transport it to the atomizing nozzle 603 through the water outlet pipe 605 and the liquid pipe 602.

[0059] It should be noted that the auxiliary mechanism 7 also includes multiple air outlets 710 equidistantly arranged on the horizontal pipe 709, whose airflow surrounds and wraps around the BIM management screen 4 to form an air curtain to prevent dust; dustproof nets 705 are provided near the two ends of the air duct 704 to filter the incoming air, and the two sides of the guide platform 707 in the center of the interior are arc-shaped surfaces facing the connecting pipe 708, which are used to efficiently gather and guide the airflow upward to the horizontal pipe 709.

[0060] This embodiment conforms to the technical positioning of "BIM-based building project management" for the following reasons:

[0061] The core function revolves around BIM information interaction: the core component of the device is the BIM management screen 4, which is specifically used to display the building information model (BIM) in real time on site, including digital engineering data such as three-dimensional components, construction progress, quality acceptance points, and safety risk sources. It is a key human-machine interface for the implementation of BIM technology on the construction site.

[0062] Serving the entire process of building construction management: This device is deployed on the construction site to solve the "last mile" disconnect between the BIM model and the physical construction. Through a visual terminal, it supports typical BIM management scenarios such as progress tracking, problem reporting, and collaborative briefing, directly supporting the multi-dimensional management needs of progress, quality, and safety during the construction phase.

[0063] Designed specifically to address the pain points of outdoor BIM terminal applications: Existing BIM systems mostly rely on indoor computers or mobile tablets, making them difficult to adapt to construction site environments. This application addresses the problems of decreased visibility, equipment damage, and maintenance difficulties caused by long-term outdoor exposure of the BIM management screen 4. It innovatively integrates self-cleaning, automatic masking, and air curtain protection functions to ensure that the BIM terminal remains continuously usable, clearly visible, and stable and reliable in harsh environments, thereby guaranteeing the true effectiveness of BIM management.

[0064] In summary, this application is not a general display screen bracket, but a special device designed to improve the practicality, reliability and intelligence of BIM in construction project site management, which is in line with the technical connotation and application goal of "BIM-based construction project management".

[0065] In this application, the dual-axis motor 601 is a motor with two independent output shafts (left and right ends). Its core advantage is that the left and right output shafts can operate synchronously but drive different functional mechanisms respectively, so as to realize multi-task collaborative control.

[0066] Specifically:

[0067] The output shaft at the left end is connected to the liquid pipe 602 via a belt pulley, which drives the pipe to rotate, thereby causing the atomizing nozzle 603 fixed on the liquid pipe 602 to rotate, thus achieving spray humidification of the BIM management screen 4 and dust reduction of the surrounding environment.

[0068] The output shaft on the right end is connected to the movable rod 606 via another set of pulleys, which drives the rod to rotate to retract the pull rope 607, thereby controlling the pull plate 608 to move up and down, and completing the screen cleaning and the unfolding or retraction of the dust cloth 609.

[0069] Since both transmission paths (left-side spraying system and right-side masking / cleaning system) are mechanically linked and start / stop synchronously by the dual output shafts of the same motor, no additional motors or complex electrical control logic are required. This ensures coordinated operation, simplifies the structure, and reduces costs. Therefore, the so-called "separate control" refers to the dual-axis motor 601 driving the two functional modules simultaneously and independently according to preset logic through a single power input, rather than completely independent electrical speed regulation. This fully meets the requirements of integrated "spraying-wiping-masking" operation in the automation process of this device.

[0070] The working principle of the above embodiments is as follows:

[0071] When the device is not in use, the dual-axis motor 601 starts, and its right output shaft drives the movable rod 606 to rotate through belt drive, so that the pull ropes 607 wrapped around its left and right sides are wound up synchronously, thereby pulling the pull plate 608 to move upward along the slide groove on the side plate 610; when the pull plate 608 rises to the highest position, the dustproof cloth 609 connecting the lower base plate 5 and the pull plate 608 is fully unfolded, covering the front of the BIM management screen 4, realizing sunshade, dustproof and physical protection for the screen.

[0072] When the device needs to be used, the dual-axis motor 601 rotates in reverse:

[0073] The output shaft on the right end drives the movable rod 606 to reverse, releasing the pull rope 607, so that the pull plate 608 moves downward along the slide groove under its own weight or the action of the auxiliary reset mechanism; during this process, the cleaning cotton fixed to the side of the pull plate 608 near the BIM management screen 4 wipes and cleans the screen surface from top to bottom.

[0074] At the same time, the output shaft on the left end drives the liquid pipe 602 to rotate slowly around its axis via belt drive. Multiple atomizing nozzles 603 installed on one side of the liquid pipe 602 rotate accordingly, spraying cleaning water evenly onto the surface of the BIM management screen 4 in a fan-shaped mist, which can humidify and soften stains and assist in cleaning. At the same time, it can also spray into the surrounding environment to achieve local dust reduction.

[0075] Clean water is drawn from the counterweight box 1 by a water pump 604. The counterweight box 1 collects rainwater through water inlet pipes 701 on both sides and a collection hopper 702 on top. After being filtered by a filter screen 703, the rainwater is stored, thus realizing the recycling of water resources. The water pump 604 delivers water through the water outlet pipe 605 to the right end of the liquid pipe 602, and the liquid is supplied by rotation through a sealed bearing.

[0076] After cleaning is completed, the auxiliary mechanism 7 is activated: the fan 706 rotates and draws in outside air. The air is first filtered by the dustproof nets 705 at both ends of the air duct 704, and then the airflow is gathered by the arc-shaped surface of the internal guide platform 707. It enters the horizontal pipe 709 through the connecting pipe 708. Since the horizontal pipe 709 is U-shaped and its length is slightly less than that of the counterweight box 1, multiple air outlets 710 evenly distributed on it can simultaneously blow clean airflow to the front and sides of the BIM management screen 4, forming a wrap-around "air wall". This not only accelerates the drying of the screen, but also continuously blocks dust intrusion when the equipment is running or in standby, achieving long-term dust prevention.

[0077] In summary, this device, through the coordinated control of the shielding mechanism 6 and the auxiliary mechanism 7 by the dual-axis motor 601, combined with the rainwater recovery function of the counterweight box 1, realizes integrated intelligent operation and maintenance of "automatic deployment - spray humidification - cotton cloth wiping - airflow drying - dustproof shielding", which significantly improves the reliability and usability of the outdoor BIM management terminal.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0079] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A BIM-based building construction management device, comprising a counterweight box (1), characterized in that: The upper surface of the counterweight box (1) is vertically fixed with two columns (2), the top of the two columns (2) is fixed with the same rain shelter (3), the front side of the two columns (2) is fixed with a BIM management screen (4) by bolts, and the outer side of the two columns (2) is fixed with two base plates (5) located above and below the BIM management screen (4) and both are horizontal. Among them, the two base plates (5) are provided with shielding mechanisms (6) for protecting the BIM management screen (4), and the counterweight box (1) is provided with an auxiliary mechanism (7) for assisting the shielding mechanism (6) in protecting the BIM management screen (4). The shielding mechanism (6) includes the following specific features: Dual-axis motor (601): It is fixed to the lower surface of the upper substrate (5); Liquid pipe (602): It is rotatably connected to the lower surface of the upper base plate (5) through a bearing seat, and is connected to the left output shaft of the dual-axis motor (601) through belt drive; Atomizing nozzles (603): There are no fewer than two of them, and they are all equidistantly connected and fixed to one side of the liquid pipe (602); Water pump (604): It is fixed to the upper surface of the counterweight box (1), and the input end is connected and fixed to the upper surface of the counterweight box (1); Water outlet pipe (605): One end of it is connected and fixed to the water outlet of the water pump (604), and the other end is rotatably connected to the right end of the liquid pipe (602) through a sealed bearing. Movable rod (606): It is rotatably connected to the upper side of the upper base plate (5) through two bearing seats, and is connected to the right output shaft of the dual-axis motor (601) via belt drive. Pull rope (607): There are two of them, which are symmetrically wrapped around the left and right sides of the outer surface of the movable rod (606); Pull plate (608): Its top surface is fixed to the other end of the two pull ropes (607); Dustproof cloth (609): It is fixed between the lower base plate (5) and the opposite side of the pull plate (608).

2. The BIM-based building construction management device according to claim 1, characterized in that: The output shafts at both ends of the dual-axis motor (601) are connected to the liquid pipe (602) and the movable rod (606) respectively via belts and pulleys.

3. The BIM-based building construction management device according to claim 1, characterized in that: The length of the movable rod (606) is greater than the length of the liquid pipe (602), and the horizontal height of the movable rod (606) is higher than the horizontal height of the liquid pipe (602), while the two are set in parallel.

4. A BIM-based building construction management device according to claim 1, characterized in that: The dustproof cloth (609) is located on the front side of the BIM management screen (4), and the pull plate (608) moves linearly up and down on the front side of the BIM management screen (4). The dustproof cloth (609) is expanded and contracted by the linear movement of the pull plate (608).

5. A BIM-based building construction management device according to claim 1, characterized in that: The shielding mechanism (6) also includes two side plates (610) fixed between the opposite sides of the two base plates (5). Each of the two side plates (610) has a sliding groove on its opposite side. The pull plate (608) is slidably connected to the side plate (610) through the sliding groove. A cleaning cotton is fixed on the side of the pull plate (608) near the BIM management screen (4).

6. A BIM-based building construction management device according to claim 1, characterized in that: The auxiliary mechanism (7) includes water inlet pipes (701) that are fixed to the left and right sides of the upper surface of the counterweight box (1). The top ends of the two water inlet pipes (701) are fixedly connected to collection hoppers (702). The inside of the two collection hoppers (702) is fixedly fitted with horizontal filter screens (703). The front of the counterweight box (1) is fixedly fitted with an air duct (704). The inside of the air duct (704) is fixedly fitted with two dustproof nets (705) and two fans (706). The center of the air duct (704) is fixedly fitted with a guide platform (707). The center of the upper surface of the air duct (704) is fixedly connected to a connecting pipe (708). The other end of the connecting pipe (708) is fixedly connected to a horizontal pipe (709).

7. A BIM-based building construction management device according to claim 6, characterized in that: The auxiliary mechanism (7) also includes multiple air outlets (710) that are equidistantly distributed on the upper surface of the horizontal tube (709) and are fixed in communication with it, and the airflow from the air outlets (710) envelops the BIM management screen (4).

8. A BIM-based building construction management device according to claim 6, characterized in that: The two dustproof nets (705) are located near the two side ports of the air duct (704), and the left and right sides of the guide platform (707) are both arc-shaped and face the direction of the connecting pipe (708).

9. A BIM-based building construction management device according to claim 7, characterized in that: The longitudinal section of the horizontal tube (709) is U-shaped, and the horizontal distance between its two ends is less than the length of the counterweight box (1).

10. A BIM-based building construction management device according to claim 6, characterized in that: The counterweight box (1) stores rainwater filtered through the inlet pipe (701) and the collection hopper (702). The input end of the water pump (604) is connected to the bottom of the counterweight box (1) to draw the stored water and deliver it to the atomizing nozzle (603) through the outlet pipe (605) and the liquid pipe (602).

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