A steel material polishing device for construction engineering

Abstract

The utility model discloses a kind of steel polishing devices for construction engineering belongs to construction engineering technical field, and its technical scheme main points include workbench, the right side of the workbench top is provided with controller, the present application is by being arranged to adjust position suction fixed component, the hidden groove of shell front side is wrapped in closed space with the flexible telescopic folding piece of two sides, can be completely wrapped in closed space with the threaded rod that drive L type support block moves, avoid the metal dust and particle debris generated by polishing adhere to the surface of threaded rod, effectively prevent screw transmission jam and thread deformation, ensure that L type support block can move smoothly to adapt to different specifications steel, significantly prolong the service life of transmission structure, simultaneously, servo motor drives threaded rod and drives L type support block to move, cooperate with the adsorption positioning structure of shell top and L type support block top, different length steel can be stably clamped, counterweight piece enhances the stability when L type support block slides, improves positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a steel grinding device for building engineering. Background Technology

[0002] In construction engineering, grinding steel is an important step in ensuring material quality and improving structural safety and durability. Since the shape of steel pipes differs from that of standard steel, specialized steel pipe grinding equipment is required.

[0003] Some steel pipe grinding devices do not clamp the steel pipes well enough. Unstable clamping leads to uneven grinding, which may cause some parts of the steel pipe to fail to meet the expected surface treatment standards, affecting the subsequent welding, sealing or anti-corrosion treatment effects. An existing patent (publication number: CN222726300U) discloses a steel grinding device for construction engineering. This utility model has the advantage of stable clamping, which solves the problem that some steel pipe grinding devices do not have an ideal clamping effect on steel pipes, and the uneven grinding caused by unstable clamping may prevent certain parts of the steel pipe from meeting the expected surface treatment standards, thus affecting the subsequent welding, sealing or anti-corrosion treatment effects.

[0004] To address the aforementioned problems, existing patents offer solutions. However, the steel grinding devices proposed in these patents have the following drawbacks: Firstly, the limiting groove at the top of the clamping mechanism housing adopts an open, unobstructed design, resulting in the threaded rod inside the housing used to drive the movement of the second support being exposed for extended periods. Since the threads on the threaded rod are precision transmission structures, when the grinding wheel grinds the steel, the generated metal dust and particulate debris easily fall into the limiting groove and adhere to the surface of the threaded rod. This not only causes transmission jamming between the threaded rod and the threaded sleeve, preventing the second support from moving smoothly to accommodate different steel specifications, but also, over time, leads to… The friction caused by the extrusion of dust particles can deform the threads on the surface of the threaded rod, directly damaging the transmission structure and significantly shortening the service life of the equipment. On the other hand, the device does not have an effective absorption and treatment structure for the metal dust generated by the grinding operation. If these dust particles, which are mostly 5-50μm in diameter, are directly diffused into the working environment, they will not only adhere to the surface of key components such as the motor and slide rails of the equipment, affecting the operating accuracy and service life of the components, but will also be inhaled into the respiratory tract by the operators. Long-term exposure will damage lung function and easily cause occupational health problems such as pneumoconiosis, which seriously violates the safety protection requirements of construction sites.

[0005] Therefore, a steel grinding device for construction engineering is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a steel grinding device for construction engineering, which can solve the following defects of the steel grinding device proposed in the above-mentioned patent: On the one hand, the limiting groove at the top of the clamping mechanism housing adopts an open and unobstructed design, which causes the threaded rod used to drive the movement of the second support to be exposed for a long time. The thread on the surface of the threaded rod is a precision transmission structure. When the grinding wheel grinds the steel, the generated metal dust and particle debris can easily fall into the limiting groove and adhere to the surface of the threaded rod. This will not only cause the transmission between the threaded rod and the threaded sleeve to jam, but also prevent the second support from moving smoothly to adapt to different specifications of steel. The accumulation of dust particles can cause deformation of the threads on the threaded rod surface due to compression and friction, directly damaging the transmission structure and significantly shortening the service life of the equipment. On the other hand, the device does not have an effective absorption and treatment structure for the metal dust generated by the grinding operation. If these dust particles, which are mostly 5-50μm in diameter, are directly diffused into the working environment, they will not only adhere to the surface of key components such as motors and slide rails, affecting the operating accuracy and service life of the components, but will also be inhaled into the respiratory tract by operators. Long-term exposure will damage lung function and easily cause occupational health problems such as pneumoconiosis, which seriously violates the safety protection requirements of construction sites.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a steel grinding device for construction engineering, comprising a workbench, a controller provided on the right side of the top of the workbench, an adjustment and suction assembly provided on the front side of the top of the workbench, and a dust-collecting grinding assembly provided on the top of the workbench. The positioning and suction assembly includes a housing bolted to the front of the top of the workbench. A recessed groove is provided on the front side of the housing. A servo motor is bolted to the left side of the housing. A threaded rod is fixedly connected to the output end of the servo motor. An L-shaped support block is threadedly connected to the surface of the threaded rod. The L-shaped support block is slidably connected inside the recessed groove. A counterweight block is bolted to the bottom of the L-shaped support block. Adsorption and positioning structures are provided on the right side of the top of the housing and the top of the L-shaped support block. Flexible telescopic folding pieces are bolted to both sides inside the recessed groove. The inner side of the flexible telescopic folding piece is bolted to the outer side of the L-shaped support block. The flexible telescopic folding piece is located outside the threaded rod.

[0008] Preferably, the dust extraction and polishing assembly includes a support plate bolted to the top of the workbench, an electric slide rail embedded in the front side of the support plate, and an electric slider provided in the front side of the electric slide rail.

[0009] Preferably, a fixed frame is fixedly connected to the front side of the electric slider, an electric push rod is bolted to the top of the fixed frame, a lifting support block is fixedly connected to the telescopic end of the electric push rod, and the lifting support block is slidably connected to the outside of the fixed frame.

[0010] Preferably, a drive motor is provided inside the front side of the lifting support block, and a grinding wheel is fixedly connected to the output end of the drive motor. The grinding wheel is located at the top of the adsorption positioning structure, and a dust suction structure is provided on the outside of the grinding wheel.

[0011] Preferably, the dust collection structure includes a connecting rod bolted to the front side of the lifting support block, and a flexible dust collection cover is welded to the bottom of the connecting rod, the flexible dust collection cover being located outside the grinding wheel.

[0012] Preferably, a flexible suction pipe is connected to the rear side of the top of the flexible dust collection hood, a filter box is provided on the rear side of the top of the workbench, the front side of the filter box is connected to the rear side of the flexible suction pipe, a dust collection fan is provided on the top of the filter box, and the absorption end of the dust collection fan is connected to the top of the filter box.

[0013] Preferably, the adsorption positioning structure includes a base plate, which is bolted to the right side of the top of the shell and the top of the L-shaped support block. A diversion pipe is welded to the top of the base plate, and an air pump is provided on the outer side of the top of the base plate. The absorption end of the air pump is connected to the outer side of the diversion pipe.

[0014] Preferably, an arc-shaped support is welded to the top of the diverter, and vacuum suction heads are provided on the bottom and both sides of the arc-shaped support. The bottom of the vacuum suction head penetrates the interior of the arc-shaped support and communicates with the diverter.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. This application, by setting up an adjustment and suction assembly, uses a hidden groove on the front side of the housing and flexible telescopic folding plates on both sides to completely enclose the threaded rod that drives the L-shaped support block to move within a closed space. This prevents metal dust and particulate debris generated during grinding from adhering to the surface of the threaded rod, effectively preventing thread transmission jamming and thread deformation. This ensures that the L-shaped support block can move smoothly to adapt to different specifications of steel, significantly extending the service life of the transmission structure. At the same time, the servo motor drives the threaded rod to move the L-shaped support block. With the suction and positioning structure at the top of the housing and the top of the L-shaped support block, it can stably clamp steel of different lengths. The counterweight enhances the stability of the L-shaped support block during sliding and improves the positioning accuracy. 2. This application sets up a dust collection and polishing component to form a dust collection path for the polishing area while polishing, which can efficiently collect 5-50μm metal dust and prevent dust from spreading to the working environment. This not only avoids dust adhering to the surface of key components and affecting the operating accuracy, but also reduces the risk of operators inhaling dust, meets safety protection requirements, and protects occupational health. At the same time, it can flexibly adjust the polishing position to adapt to different polishing needs. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the steel grinding device for building engineering according to this utility model; Figure 2 This is a structural diagram of the positioning and stabilizing component of this utility model; Figure 3 This is a structural diagram of the adsorption and positioning structure of this utility model; Figure 4 This is a structural diagram of the dust collection and polishing component of this utility model; Figure 5 This is a structural diagram of the dust collection structure of this utility model.

[0017] In the diagram: 1. Workbench; 2. Controller; 3. Positioning and suction assembly; 301. Housing; 302. Hidden groove; 303. Servo motor; 304. Threaded rod; 305. L-shaped support block; 306. Counterweight block; 307. Adsorption and positioning structure; 3071. Base plate; 3072. Diverter pipe; 3073. Air pump; 3074. Arc-shaped support; 3075. Vacuum suction head; 308. Flexible telescopic fold. 4. Dust collection and polishing assembly; 401. Support plate; 402. Electric slide rail; 403. Electric slider; 404. Fixing frame; 405. Electric push rod; 406. Lifting support block; 407. Drive motor; 408. Polishing wheel; 409. Dust collection structure; 4091. Connecting rod; 4092. Flexible dust collection hood; 4093. Soft dust collection hose; 4094. Filter box; 4095. Dust collection fan. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5 The present invention provides the following technical solution: A steel grinding device for construction engineering includes a workbench 1, a controller 2 is provided on the right side of the top of the workbench 1, an adjustment and suction assembly 3 is provided on the front side of the top of the workbench 1, and a dust suction and grinding assembly 4 is provided on the top of the workbench 1. The positioning and suction assembly 3 includes a housing 301 bolted to the front of the top of the workbench 1. A recessed groove 302 is provided on the front side of the housing 301. A servo motor 303 is bolted to the left side of the housing 301. A threaded rod 304 is fixedly connected to the output end of the servo motor 303. An L-shaped support block 305 is threaded to the surface of the threaded rod 304. The L-shaped support block 305 is slidably connected inside the recessed groove 302. A counterweight block 306 is bolted to the bottom of the L-shaped support block 305. A suction and positioning structure 307 is provided on the right side of the top of the housing 301 and the top of the L-shaped support block 305. Flexible telescopic folding pieces 308 are bolted to both sides inside the recessed groove 302. The inner side of the flexible telescopic folding piece 308 is bolted to the outer side of the L-shaped support block 305. The flexible telescopic folding piece 308 is located outside the threaded rod 304.

[0020] In this embodiment: by setting up a workbench 1, a controller 2, an adjustment and suction assembly 3, and a dust collection and polishing assembly 4, the operator first starts the device through the controller 2 on the top right side of the workbench 1. The controller 2 first triggers the adjustment and suction assembly 3 to work, the servo motor 303 runs and drives the threaded rod 304 at the output end to rotate. Because the threaded rod 304 is threadedly connected to the L-shaped support block 305, and the L-shaped support block 305 is restricted to the hidden groove 302 on the front side of the housing 301 and cannot rotate, when the threaded rod 304 rotates, it will drive the L-shaped support block 305 to move horizontally along the hidden groove 302 until the top right side of the housing 301 is connected to the L-shaped support block 305. The spacing of the adsorption positioning structures 307 at the top of the support block 305 is adapted to the length of the steel to be ground. The steel is then placed on the two adsorption positioning structures 307, and the adsorption positioning structures 307 are activated to achieve stable clamping of the steel through vacuum adsorption. During this process, the counterweight 306 at the bottom of the L-shaped support block 305 balances the force during the sliding of the support block, preventing it from shifting and further ensuring accurate positioning of the steel. It is worth noting that during the movement of the L-shaped support block 305, the flexible telescopic folding pieces 308 on both sides inside the hidden groove 302 move synchronously: when the L-shaped support block 305 moves to the right, the flexible telescopic folding piece 308 on the left unfolds. The right-side flexible telescopic folding piece 308 retracts, and the opposite occurs when it moves to the left, always completely enclosing the threaded rod 304 within the closed space. This prevents metal dust and particulate debris generated during subsequent grinding from entering the hidden groove 302 and adhering to the surface of the threaded rod 304, ensuring smooth thread transmission over a long period. After the steel is positioned and clamped, the controller 2 activates the dust-collecting and grinding assembly 4 to perform grinding operations on the steel. The adsorption and positioning structure 307 continuously keeps the steel fixed, preventing displacement of the steel during grinding and affecting accuracy. While grinding, the dust-collecting and grinding assembly 4 forms a dust collection path for the grinding area, efficiently collecting 5-50μm metal powder. Dust is prevented from spreading to the working environment, avoiding dust adhesion to the surface of key components and affecting operational accuracy, while also reducing the risk of inhalation by operators. This meets the safety protection requirements of construction sites and ensures occupational health. At the same time, the dust collection and grinding component 4 can flexibly adjust the grinding position to adapt to the grinding needs of different steel materials. The entire process relies on the workbench 1 to provide a stable working platform. The controller 2 coordinates the coordinated work of the positioning and clamping component 3 and the dust collection and grinding component 4, which not only achieves precise positioning and stable clamping of steel materials of different specifications, but also protects the transmission structure through the flexible telescopic folding plate 308, effectively extending the service life of the equipment.

[0021] Specifically, such as Figure 4 As shown, the dust extraction and polishing assembly 4 includes a support plate 401 bolted to the top of the workbench 1, an electric slide rail 402 embedded in the front side of the support plate 401, and an electric slider 403 provided in the front side of the electric slide rail 402.

[0022] Specifically, such as Figure 4As shown, a fixed frame 404 is fixedly connected to the front side of the electric slider 403, an electric push rod 405 is bolted to the top of the fixed frame 404, a lifting support block 406 is fixedly connected to the telescopic end of the electric push rod 405, and the lifting support block 406 is slidably connected to the outside of the fixed frame 404.

[0023] Specifically, such as Figure 4 As shown, a drive motor 407 is installed inside the front side of the lifting support block 406. A grinding wheel 408 is fixedly connected to the output end of the drive motor 407. The grinding wheel 408 is located on the top of the adsorption positioning structure 307. A dust suction structure 409 is installed on the outside of the grinding wheel 408.

[0024] In this embodiment: by setting up the dust extraction and polishing component 4, the support plate 401 provides a stable mounting base for the electric slide rail 402. The electric slide rail 402 can drive the electric slider 403 on the front side to move laterally, thereby driving the fixed frame 404 fixed to the electric slider 403 to adjust laterally in sync. When the electric push rod 405 on the top of the fixed frame 404 extends or retracts, it can push the lifting block 406 to slide up and down along the outside of the fixed frame 404 to achieve height adjustment. When the drive motor 407 on the front side of the lifting block 406 is running, it can drive the polishing wheel at the output end. The grinding wheel 408 rotates at high speed to grind the steel on the lower adsorption and positioning structure 307. At the same time, the dust collection structure 409 is activated to collect and process the metal dust generated during the grinding process. The horizontal position and height of the grinding wheel 408 can be flexibly adjusted by the lateral movement of the electric slider 403 and the lifting and lowering adjustment of the electric push rod 405 to adapt to the different grinding area requirements of different specifications of steel, ensuring comprehensive grinding coverage and higher precision. The dust collection structure 409 can effectively prevent dust diffusion, ensuring a clean working environment and the health of personnel.

[0025] Specifically, such as Figure 5 As shown, the dust collection structure 409 includes a connecting rod 4091 bolted to the front side of the lifting support block 406. A flexible dust collection cover 4092 is welded to the bottom of the connecting rod 4091, and the flexible dust collection cover 4092 is located outside the grinding wheel 408.

[0026] Specifically, such as Figure 5 As shown, a flexible suction hood 4092 has a flexible suction pipe 4093 connected to the rear side of its top. A filter box 4094 is provided on the rear side of the top of the workbench 1. The front side of the filter box 4094 is connected to the rear side of the flexible suction pipe 4093. A suction fan 4095 is provided on the top of the filter box 4094. The absorption end of the suction fan 4095 is connected to the top of the filter box 4094.

[0027] In this embodiment: by setting up a dust suction structure 409, the connecting rod 4091 on the front side of the lifting block 406 provides fixed support for the flexible dust suction hood 4092, and the flexible dust suction hood 4092 covers the outside of the grinding wheel 408, which can closely fit the grinding area. When the dust suction fan 4095 is started, a negative pressure will be formed in the filter box 4094, the flexible suction pipe 4093 and the flexible dust suction hood 4092. The 5-50μm metal dust generated by the grinding wheel 408 grinding the steel will be sucked into the flexible dust suction hood 4092 by the negative pressure, and transported to the filter box 4094 through the flexible suction pipe 4093 for filtration and collection. This not only avoids the dust from spreading to the working environment and affecting the precision of key components of the equipment and the health of the operators, but also allows for centralized treatment of the dust, which meets the safety protection requirements.

[0028] Specifically, such as Figure 3 As shown, the adsorption positioning structure 307 includes a base plate 3071, which is bolted to the right side of the top of the housing 301 and the top of the L-shaped support block 305. A diversion pipe 3072 is welded to the top of the base plate 3071, and an air pump 3073 is provided on the outer side of the top of the base plate 3071. The absorption end of the air pump 3073 is connected to the outer side of the diversion pipe 3072.

[0029] Specifically, such as Figure 3 As shown, an arc-shaped support 3074 is welded to the top of the diverter 3072. Vacuum suction heads 3075 are provided on the bottom and both sides of the arc-shaped support 3074. The bottom of the vacuum suction head 3075 penetrates the interior of the arc-shaped support 3074 and communicates with the diverter 3072.

[0030] In this embodiment: by setting an adsorption positioning structure 307, the base plate 3071 provides an installation carrier for the diversion pipe 3072 and the air pump 3073. The arc-shaped support 3074 can fit against the outer surface of the steel and support the steel. When the air pump 3073 is started, it will draw air from the arc-shaped support 3074 through the diversion pipe 3072, so that the vacuum suction head 3075 inside the arc-shaped support 3074 generates negative pressure, thereby firmly adsorbing and fixing the steel placed on the arc-shaped support 3074. At the same time, the two adsorption positioning structures 307 are respectively installed on the housing 301 and the L-shaped support block 305, which can move with the L-shaped support block 305 to adapt to steel of different lengths, ensuring that steel of different specifications can remain stable during the grinding process and avoiding displacement that affects the grinding accuracy.

[0031] Working Principle: During the use of the steel grinding device for construction engineering, the operator first starts the device through the controller 2 on the top right side of the workbench 1. Then, according to the length of the steel to be ground, the controller 2 triggers the servo motor 303 of the positioning and stabilizing component 3 to operate. The servo motor 303 drives the threaded rod 304 at the output end to rotate. Because the threaded rod 304 is threadedly connected to the L-shaped support block 305, and the L-shaped support block 305 is restricted to the hidden groove 302 on the front side of the housing 301 and cannot rotate, the rotation of the threaded rod 304 will drive the L-shaped support block 305 to move horizontally along the hidden groove 302. During this period, the counterweight block 306 at the bottom of the L-shaped support block 305 balances the sliding force of the support block and prevents deviation, until the top right side of the housing 301 is reached. The spacing between the adsorption positioning structure 307 on the top of the L-shaped support block 305 and the length of the steel is adapted. During this process, the flexible telescopic folding pieces 308 on both sides inside the hidden groove 302 move synchronously with the movement of the L-shaped support block 305: when the L-shaped support block 305 moves to the right, the flexible telescopic folding piece 308 on the left unfolds and the one on the right retracts, and vice versa when it moves to the left, always keeping the threaded rod 304 enclosed in a closed space to prevent subsequent grinding dust from adhering and affecting the transmission. Then, the steel is placed on the arc-shaped support 3074 of the two adsorption positioning structures 307, and the air pump 3073 is started. The air pump 3073 draws air from the arc-shaped support 3074 through the diversion pipe 3072, so that the internal vacuum suction head 3075 generates negative pressure, firmly adsorbing and fixing the steel. The arc-shaped support 3074 fits against the outer surface of the steel to further ensure clamping stability. After the steel is positioned, the controller 2 activates the dust collection and polishing assembly 4: the electric slide rail 402 embedded in the front of the support plate 401 drives the electric slider 403 to move laterally, causing the fixed frame 404 to adjust the lateral position of the polishing simultaneously. The electric push rod 405 on the top of the fixed frame 404 extends and retracts, pushing the lifting block 406 to slide up and down along the outside of the fixed frame 404, adjusting the height of the polishing wheel 408 until the polishing wheel 408 fits against the area of ​​the steel to be polished. Then, the drive motor 407 on the front of the lifting block 406 operates, driving the polishing wheel 408 to rotate at high speed to polish the steel. At the same time, the dust collection structure 409 starts simultaneously, and the dust collection fan 4095... The operation creates negative pressure within the filter box 4094, the flexible suction pipe 4093, and the flexible suction hood 4092. The flexible suction hood 4092 closely covers the grinding area, sucking in the generated 5-50μm metal dust, which is then transported through the flexible suction pipe 4093 to the filter box 4094 for centralized filtration and collection, preventing dust diffusion. During the grinding process, the adsorption positioning structure 307 continuously keeps the steel fixed, preventing displacement that could affect accuracy. The entire operation relies on the stable platform provided by the workbench 1, and the controller 2 coordinates the collaborative work of all components, achieving precise positioning and comprehensive grinding of steel of different specifications, while ensuring a clean working environment and personnel health through dust collection, and protecting the transmission structure to extend the service life of the equipment.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for grinding a steel material for construction engineering, comprising a worktable (1), characterized in that: A controller (2) is provided on the right side of the top of the workbench (1), an adjustment and suction assembly (3) is provided on the front side of the top of the workbench (1), and a dust collection and polishing assembly (4) is provided on the top of the workbench (1). The positioning and locating assembly (3) includes a housing (301) bolted to the front of the top of the workbench (1). A recessed groove (302) is provided on the front side of the housing (301). A servo motor (303) is bolted to the left side of the housing (301). A threaded rod (304) is fixedly connected to the output end of the servo motor (303). An L-shaped support block (305) is threadedly connected to the surface of the threaded rod (304). The L-shaped support block (305) is slidably connected to the recessed groove (302). Inside, a counterweight (306) is bolted to the bottom of the L-shaped support block (305). An adsorption positioning structure (307) is provided on the right side of the top of the shell (301) and the top of the L-shaped support block (305). Flexible telescopic folding pieces (308) are bolted to both sides inside the hidden groove (302). The inner side of the flexible telescopic folding piece (308) is bolted to the outer side of the L-shaped support block (305). The flexible telescopic folding piece (308) is located on the outer side of the threaded rod (304).

2. The steel bar polishing device for construction work according to claim 1, characterized in that: The dust collection and polishing assembly (4) includes a support plate (401) bolted to the top of the workbench (1), an electric slide rail (402) is embedded in the front side of the support plate (401), and an electric slider (403) is provided on the front side of the electric slide rail (402).

3. The steel bar polishing device for construction work according to claim 2, characterized in that: The electric slider (403) is fixedly connected to a fixed frame (404) on the front side. An electric push rod (405) is bolted to the top of the fixed frame (404). A lifting block (406) is fixedly connected to the telescopic end of the electric push rod (405). The lifting block (406) is slidably connected to the outside of the fixed frame (404).

4. The steel bar polishing device for construction work according to claim 3, characterized in that: A drive motor (407) is provided inside the front side of the lifting support block (406). A grinding wheel (408) is fixedly connected to the output end of the drive motor (407). The grinding wheel (408) is located on the top of the adsorption positioning structure (307). A dust suction structure (409) is provided on the outside of the grinding wheel (408).

5. A steel bar polishing device for construction works as claimed in claim 4 wherein: The dust collection structure (409) includes a connecting rod (4091) bolted to the front side of the lifting support block (406), and a flexible dust collection cover (4092) is welded to the bottom of the connecting rod (4091). The flexible dust collection cover (4092) is located on the outside of the grinding wheel (408).

6. The steel bar polishing apparatus for construction works as claimed in claim 5 wherein: The flexible dust collection hood (4092) is connected to a flexible dust collection pipe (4093) at the rear of its top. A filter box (4094) is provided at the rear of the top of the workbench (1). The front of the filter box (4094) is connected to the rear of the flexible dust collection pipe (4093). A dust collection fan (4095) is provided at the top of the filter box (4094). The absorption end of the dust collection fan (4095) is connected to the top of the filter box (4094).

7. The steel bar polishing device for construction work according to claim 1, characterized in that: The adsorption positioning structure (307) includes a base plate (3071), which is bolted to the right side of the top of the shell (301) and the top of the L-shaped support block (305). A diversion pipe (3072) is welded to the top of the base plate (3071), and an air pump (3073) is provided on the outer side of the top of the base plate (3071). The absorption end of the air pump (3073) is connected to the outer side of the diversion pipe (3072).

8. The steel bar polishing device for construction work according to claim 7, characterized in that: The top of the diverter (3072) is welded with an arc-shaped support (3074). Vacuum suction heads (3075) are provided on the bottom and both sides of the arc-shaped support (3074). The bottom of the vacuum suction head (3075) penetrates the interior of the arc-shaped support (3074) and communicates with the diverter (3072).

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