A steel structure pretreatment device for civil field

Abstract

The application relates to a civil site steel structure pretreatment device, which comprises an angle grinder, a rust removal wheel arranged on an output shaft of the angle grinder, a mounting frame detachably connected to the angle grinder, a handle bar and a horizontal adjusting piece arranged on the mounting frame, and the handle bar is fixedly connected above the mounting frame for a user to hold. The application has the advantages that the horizontal position and the vertical position of the guide wheel assembly can be adjusted according to the needs through the horizontal adjusting piece and the telescopic rod, so that the device can be adapted to steel structure components with different shapes and sizes, the device can be adapted to flanges and webs of H-shaped steel and I-shaped steel with different sizes, and can also be adapted to square steel, thus covering common steel structure components. A worker pulls the angle grinder to directly move along the length direction of the steel, so that the steel structure component can be quickly and uniformly rust-removed, and the device can meet the needs of civil construction site steel structure pretreatment work.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and in particular to a steel structure pretreatment device for civil engineering sites. Background Technology

[0002] Steel, an indispensable material in people's lives, is widely used in construction, especially in the construction of steel structure buildings. On civil engineering construction sites, a large number of steel structural components, such as H-beams and square steel, are stored.

[0003] Due to the environment at civil construction sites, stored steel structural components may develop impurities and rust. Before using these components for construction, they need to undergo pretreatment processes including impurity removal, rust removal, and painting.

[0004] Existing technologies include rust removal methods such as grinding with an angle grinder, sandblasting, and shot blasting. However, due to cost control considerations, sandblasting and shot blasting are generally not used on-site. On-site, for lighter rust, hammering combined with steel wool is often used for friction; for more severe rust, an angle grinder is used for grinding.

[0005] When using an angle grinder to remove rust from steel structural components, the limited size of the grinding wheel or cup-shaped wire wheel necessitates the worker to hold the grinder and grind bit by bit. Steel structural components are generally long and narrow, such as H-beams, I-beams, and square steel. Frequent movement of the worker during angle grinder grinding makes it difficult to maintain consistent contact between the grinding wheel and the steel structural component each time. This results in uneven grinding, affecting the quality of rust removal and potentially causing changes in the strength of the steel structural components, creating potential safety hazards for the project.

[0006] For example, a high-performance angle grinder, disclosed in CN118636023A, uses a connecting frame on the side of the grinder with an adjustable guide structure. During cutting (and when used for rust removal, the grinder can be flipped to grind), the guide structure controls the grinder's stroke and displacement, resulting in more uniform grinding. However, this guide structure is primarily effective on plate-shaped objects and is not suitable for main steel structural components such as H-beams, I-beams, and square steel. Another example is an angle grinder guide device, disclosed in CN114161283A, which directly installs a guide frame and matching angle steel on the side of the grinder. In use, the angle steel is fixed to the product to be processed, and the guide frame is fitted onto the angle steel to form a guide rail, guiding the grinder and enabling it to cut and grind long, narrow structures evenly and quickly. However, its operation relies on angle steel. When used for rust removal of H-beam flanges and square steel on construction sites, external structures are needed to fix the angle steel. Since steel structure components are generally stacked directly on construction sites, if external structures are required, the steel structure components must be moved to a suitable position before the angle steel is fixed. This makes it difficult to adapt to the needs of steel structure pretreatment work on civil construction sites. Summary of the Invention

[0007] This invention provides a steel structure pretreatment device for civil engineering sites, which can solve the problem that existing angle grinders are difficult to use quickly and evenly to remove rust from steel structural components such as H-beams, I-beams, and square steel, and are not suitable for the needs of steel structure pretreatment work on civil engineering construction sites.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a steel structure pretreatment device for civil engineering sites, including an angle grinder, a rust removal wheel is provided on the output shaft of the angle grinder, a mounting frame is detachably connected to the angle grinder, a set of adjustable horizontal adjustment components are provided on each side of the mounting frame, a telescopic rod is provided at the end of the horizontal adjustment component, the telescopic rod includes a main rod, a telescopic sub-rod, and an adjustment rod that controls the extension and retraction of the sub-rod by rotation, the main rod is connected to the horizontal adjustment component, and a guide wheel assembly capable of horizontal rotation is provided at the end of the sub-rod.

[0009] Preferably, the female rod is rotatably connected to the end of the leveling component via a rotating shaft, and a knob is fixedly connected to one end of the rotating shaft. A locking bolt that can lock the knob is threaded onto the knob.

[0010] Preferably, a grip bar for the user to hold is fixedly connected to the mounting bracket.

[0011] Preferably, the leveling component further includes a handle fixedly connected to the screw.

[0012] Preferably, the guide wheel assembly includes a frame and a guide wheel rotatably connected within the frame.

[0013] Preferably, the guide wheel adopts an "I" shaped structure.

[0014] Preferably, the output end of the angle grinder is provided with a pressure sensor assembly capable of wireless communication, and the handle is provided with a display assembly capable of receiving the wireless signal emitted by the pressure sensor assembly.

[0015] Preferably, the pressure sensor assembly includes a cylinder fixedly connected to the angle grinder, a pressure sensor inserted into the cylinder from the bottom, and a spring connecting the pressure sensor and the cylinder.

[0016] Preferably, the rust removal wheel is a cup-shaped wire wheel.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The steel structure pretreatment device on-site for civil engineering projects, equipped with horizontal adjustment components and telescopic rods, allows for adjustment of the horizontal and vertical positions of the guide wheel assembly as needed. This enables the device to adapt to steel structure components of different shapes and sizes. For example, when removing rust from square steel, the guide wheel assembly clamps onto both sides of the square steel; when removing rust from the web of H-beams and I-beams, the guide wheel assembly rests against the inner side of the flange or clamps onto the outer side of the flange; and when removing rust from the flange plates of H-beams and I-beams, the guide wheel assembly clamps onto both ends of the flange. In summary, this device can adapt to the flanges and webs of H-beams and I-beams of different sizes, and can also adapt to square steel, covering common steel structure components. Workers can pull the angle grinder directly along the length of the steel, enabling rapid and uniform rust removal of steel structure components, meeting the needs of steel structure pretreatment work on civil engineering construction sites.

[0018] 2. The steel structure pretreatment device on-site is connected to the horizontal adjustment component via a telescopic rod. When removing rust from round steel, the telescopic rod can be adjusted to tilt it, causing the guide wheel assembly to abut against the side of the round steel, thus restraining the angle grinder. Furthermore, workers operate the angle grinder by holding the handle, keeping their hands away from the rust removal wheel. This prevents accidental contact with flying debris from the rust removal wheel or its contact with the steel structure components, improving safety. Workers do not need to bend over or squat; simply pulling the handle moves the angle grinder directly along the length of the steel structure component, enabling rapid rust removal. This effectively improves pretreatment efficiency, ensures construction progress, reduces labor costs, and lowers project costs. Attached Figure Description

[0019] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second perspective structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is a schematic diagram of the telescopic rod of the present invention; Figure 6 This is a schematic diagram of the working state under the first working condition of the present invention; Figure 7 This is a schematic diagram of the working state under the second working condition of the present invention; Figure 8 This is a schematic diagram of a structure according to an embodiment of the present invention; Figure 9 For the present invention Figure 8 A structural schematic diagram from another perspective of the embodiment shown; Figure 10 For the present invention Figure 8 A schematic diagram of the structure of the pressure sensor assembly in the embodiment shown.

[0020] In the picture: 1. Angle grinder; 2. Rust removal wheel; 3. Mounting bracket; 4. Handle; 5. Horizontal adjustment component; 501. Threaded sleeve; 502. Screw; 503. Mounting frame; 504. Rotary handle; 6. Telescopic rod; 601. Main rod; 602. Adjustment rod; 603. Sub-rod; 604. Knob; 605. Locking bolt; 7. Guide wheel assembly; 701. Sleeve; 702. Guide wheel; 8. Square steel; 9. H-beam; 10. Pressure sensor assembly; 1001. Cylinder base; 1002. Spring; 1003. Pressure sensor; 11. Display components. Detailed Implementation

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figures 1 to 2As shown, the present invention provides a steel structure pretreatment device for civil engineering sites, including an angle grinder 1, a rust removal wheel 2 is provided on the output shaft of the angle grinder 1, a mounting frame 3 is detachably connected to the angle grinder 1, and a set of adjustable horizontal adjustment components 5 are provided on each side of the mounting frame 3.

[0023] The end of the horizontal adjustment component 5 is provided with a telescopic rod 6. The telescopic rod 6 includes a main rod 601, a telescopic sub-rod 603, and an adjustment rod 602 that controls the extension and retraction of the sub-rod 603 by rotation. The main rod 601 is connected to the horizontal adjustment component 5, and the end of the sub-rod 603 is provided with a guide wheel assembly 7 that can rotate in the horizontal direction.

[0024] Specifically, the angle grinder 1, as the core component of this device, converts electrical energy into mechanical energy through a motor, driving the grinding disc to rotate at high speed. Utilizing the cutting and grinding characteristics of the disc, it performs metal grinding, cutting, and rust removal operations. The output end of the angle grinder 1 is equipped with a chuck or flange to fix the rust-removing wheel 2 onto the output shaft. Tightening with a wrench ensures that the rust-removing wheel 2 remains secure during high-speed rotation. The angle grinder 1 is available in both plug-in and lithium-ion battery versions, both suitable for this device. This application does not limit the specific model of the angle grinder 1. Driven by the angle grinder 1, the rust-removing wheel 2 rotates at high speed, grinding and removing rust from the steel structural components it contacts. The rust-removing wheel 2 can be a flap wheel, abrasive cloth wheel, grinding wheel, wire wheel, etc.

[0025] Mounting bracket 3 provides a mounting platform for the leveling component 5, which can be fixed to the angle grinder 1 with bolts. Mounting bracket 3 preferably has a U-shaped structure, fitting snugly onto the angle grinder 1 from above, and is secured on both sides with bolts to ensure stability. The mounting bracket 3 makes the leveling component 5 and other structures detachable and independent from the angle grinder 1, allowing users to choose whether or not to carry the mounting bracket 3 and its components during operation, making it flexible and convenient to use.

[0026] The horizontal adjustment component 5 and the telescopic rod 6 are used to adjust the horizontal and vertical positions of the guide wheel assembly 7, respectively, so that the guide wheel assembly 7 can adapt to steel structure components of different sizes and shapes. The horizontal adjustment component 6 can take the form of a screw threaded to the mounting bracket 3, or a plug plate inserted into the mounting bracket 3 and locked using a bolt / pin. The telescopic rod 6 is a common manually adjustable telescopic rod. It is preferably a multi-stage telescopic rod, so that the device can adapt to steel structure components of more sizes. When the telescopic rod 6 is a multi-stage telescopic rod, each section of the rod should be equipped with a rotary locking mechanism, which can be referred to as an existing multi-stage telescopic rod that adjusts the length by manual rotation. The telescopic rod 6 should have a certain strength to prevent it from bending and becoming unusable when subjected to lateral impact, and is preferably made of carbon steel or alloy steel. The guide wheel assembly 7 is used to clamp or abut against the steel structure component, providing constraint for the angle grinder 1, so that the angle grinder 1 can only move in the length direction of the steel structure component. Under this constraint, workers can directly pull the angle grinder to remove rust from different parts of the steel structure components.

[0027] In practical use, adjust the length of the horizontal adjustment component 5 according to the steel size to move the telescopic rod 6 and guide wheel assembly 7 to both sides of the steel. Adjust the length of the telescopic rod 6 to move the guide wheel assembly 7 to the side of the steel. Adjust the length of the horizontal adjustment component 5 again so that the guide wheel assembly 7 rests against the steel or clamps the steel. For example, when removing rust from square steel, the guide wheel assembly 7 is clamped on both sides of the square steel; when removing rust from the web of H-beams and I-beams, the guide wheel assembly 7 rests against the inside of the flange or is clamped on the outside of the flange; when removing rust from the flange of H-beams and I-beams, the guide wheel assembly 7 is clamped at both ends of the flange. Then the angle grinder 1 can be started to remove rust. Under the constraint of the guide wheel assembly 7, the angle grinder 1 moves along the length of the steel structure component to remove rust. It is worth noting that the two sets of guide wheel assemblies 7 are not adjusted synchronously. This allows the device to remove rust from steel structural members located off-center. For example, if one side of the steel structural member is wide, but rust only exists on one side, the device needs to be positioned eccentrically for rust removal. Figures 3 to 4 As shown, in order to further improve the applicability of the device, preferably, the female rod 601 is rotatably connected to the end of the horizontal adjustment member 5 via a rotating shaft, and a knob disk 604 is fixedly connected to one end of the rotating shaft. A locking bolt 605 that can lock the knob disk 604 is threadedly connected to the knob disk 604.

[0028] Specifically, the main rod 601 is rotatably connected to the end of the horizontal adjustment component 5. Together with the knob 604 and locking bolt 605, the tilt angle of the telescopic rod 6 can be adjusted as needed. When removing rust from the round steel, first rotate the locking bolt 605 to unlock the knob 604, then rotate the knob 604 to tilt the lower end of the telescopic rod 6 inwards, causing the guide wheel assembly 7 to abut against the round steel. Then rotate the locking bolt 605 to firmly abut against the horizontal adjustment component 5, locking the telescopic rod 6 and constraining the angle grinder 1. The angle grinder 1 can then be directly pulled along the length of the round steel for rapid rust removal. Furthermore, to improve the locking effect of the locking bolt 605, evenly distributed locking grooves can be made on the horizontal adjustment component 5. The locking bolt 605 is inserted into the locking grooves to lock the telescopic rod 6, making the lock more secure.

[0029] like Figures 3 to 4 As shown, in order to facilitate the adjustment of the horizontal position of the guide wheel assembly, preferably, the horizontal adjustment component 5 includes a threaded sleeve 501 fixedly connected in the mounting bracket 3, a screw 502 threadedly connected to the threaded sleeve 501, and a mounting frame 503 rotatably connected to the end of the screw 502.

[0030] Specifically, the combined structure of the threaded sleeve 501 and the screw 502 allows the user to adjust the horizontal position of the guide wheel assembly 7 by simply rotating the screw 502 relative to the threaded sleeve 501. A mounting frame 503 is provided at the end of the screw 502, providing a mounting platform for the telescopic rod 6. The mounting frame 503 is rotatably connected to the screw 502, eliminating the need for the telescopic rod 6 to rotate with it. This allows the telescopic rod 6 to maintain its position relative to the threaded sleeve 501, resulting in finer horizontal adjustment precision for the guide wheel assembly 7 and enabling it to accommodate a wider range of steel structural components. Furthermore, when not in use, the screw 502 can be retracted into the threaded sleeve 501, reducing the device's size and the probability of damage from external impacts.

[0031] like Figures 3 to 4 As shown, in order to facilitate the user's adjustment of the length of the horizontal adjustment component, preferably, the horizontal adjustment component 5 also includes a handle 504 fixedly connected to the screw 502.

[0032] Specifically, a handle 504 is provided on the screw 502. When the user needs to adjust the length of the leveling component, they can directly hold and rotate the handle 504 to drive the screw 502 to rotate, thus adjusting the length of the leveling component. Compared to directly holding and rotating the screw 502, applying force is more convenient and the operation is simpler.

[0033] like Figure 4As shown, in order to achieve both providing constraints for the device and ensuring smooth movement of the device, preferably, the guide wheel assembly 7 includes a frame 701 and a guide wheel 702 rotatably connected within the frame 701.

[0034] Specifically, the guide wheel assembly 7 is used to clamp or abut against the steel structure component, and the mounting bracket 3 constrains the angle grinder 1, making it difficult for the steel structure component to move in the width direction. The sleeve 701 connects to the telescopic rod 6 and provides a mounting platform for the guide wheel 702. The guide wheel 702 is rotatably connected within the sleeve 701, abutting or clamping against the steel structure component, and rotates when the user pulls the handle 4, causing the device to move along the length of the steel structure component. The guide wheel 702 can be either wheel-shaped or spherical.

[0035] like Figures 1 to 2 As shown, in order to improve the ease of operation of the device, preferably, a grip bar 4 for the user to hold is fixedly connected to the mounting frame 3.

[0036] Specifically, the handle 4 functions similarly to a regular shovel handle, allowing the user to hold it while standing, extending the gripping range of the angle grinder 1. This eliminates the need for bending or crouching when removing rust from steel structural components piled on the ground. The user can also adjust the contact between the rust-removing wheel 2 and the steel structural components by raising or lowering the handle 4 to treat different levels of rust. The handle 4 can be made of wood, metal, or other materials. When using metal, metals with lower density and higher strength, such as aluminum alloys or magnesium alloys, are preferred. Furthermore, to improve stability during gripping, an anti-slip sleeve can be installed on the handle 4, increasing the friction between the worker's hand and the handle 4, thus improving stability. The anti-slip sleeve also provides some cushioning, reducing the risk of injury to the worker's hands from equipment vibration during rust removal. The anti-slip sleeve can be made of thermoplastic rubber, food-grade or industrial-grade silicone, ABS engineering plastic, or other materials.

[0037] In addition, the mounting bracket 3 is bolted to the angle grinder 1, and the angle of the mounting bracket 3 can be adjusted according to the user's usage habits and height, so that the user can hold the handle 4 in a comfortable posture while working.

[0038] In order to achieve the purpose of selecting guide wheel assemblies of different sizes as needed and adapting to more steel structure components, preferably, the top end of the sleeve 701 is fixedly connected to a threaded column, the end of the sub-rod 603 is provided with a threaded groove, and the sleeve 701 is threadedly connected to the threaded groove through a threaded shaft.

[0039] Specifically, the fit between the threaded post and the threaded groove not only provides vertical and horizontal constraints on the sleeve 701, but also allows for easy assembly and disassembly of the sleeve 701. When the guide wheel assembly 7 is damaged or the current size of the guide wheel 702 is not suitable for the steel structure component requiring rust removal, it can be removed from the sub-rod 603 by rotating the sleeve 701, allowing for easy replacement of the guide wheel assembly 7.

[0040] like Figures 8 to 9 As shown, in order to visualize the depth of the rust removal wheel and make it convenient for workers to know the grinding depth when holding the handle, preferably, the output end of the angle grinder 1 is equipped with a pressure sensor assembly 10 that can communicate wirelessly, and the handle 4 is equipped with a display assembly 11 that can receive the wireless signal emitted by the pressure sensor assembly 10.

[0041] Specifically, when the angle grinder 1 drives the rust-removing wheel 2 to grind and remove rust from the steel structure component, the pressure sensor assembly 10 senses the reaction force transmitted from the steel structure component and transmits this reaction force to the display assembly 11 via wireless communication. The operator then uses the display assembly 11 to obtain the current pressure value and determine whether the height of the angle grinder 1 needs to be adjusted. In this way, the operator can intuitively know the current grinding depth while holding the handle 4 for rust removal, which helps improve the quality of rust removal. The pressure sensor assembly 10 communicates with the display assembly 11 wirelessly, avoiding the need for cables between the two and making installation more convenient.

[0042] like Figure 10 As shown, in order to enable the pressure sensor assembly to sense the reaction force of the steel structure component without affecting the downward movement of the rust removal wheel, preferably, the pressure sensor assembly 10 includes a cylinder base 1001 fixedly connected to the angle grinder 1, a pressure sensor 1003 inserted into the cylinder base 1001 from the bottom surface, and a spring 1002 connected between the pressure sensor 1003 and the cylinder base 1001.

[0043] Specifically, the cylinder base 1001 provides an installation platform for the spring 1002 and the pressure sensor 1003, and also provides protection for both. The pressure sensor 1003 is connected to the cylinder base 1001 via the spring 1002. In areas with severe rust, workers can press down on the handle 4 to move the rust-removing wheel 2 downwards. At this time, the pressure sensor 1003 will experience a greater reaction force from the steel structure components, allowing it to move inwards into the cylinder base 1001 and compress the spring 1002, thus preventing damage due to overload. Specific models of the pressure sensor 1003 can include Phoenix WEPS37, Linovision IOT-S500PP, etc., with communication methods such as Bluetooth, LoRaWAN, BLE, etc., and power supply methods such as button batteries, lithium-ion batteries, etc. The display component 11 can specifically include models such as the AEP WiStar receiver, Nanjing Huiming HM-WP1 display, etc. It is worth noting that when a display component 11 is provided, if both the angle grinder 1 and the display component 11 are powered by a plug-in, a hollow handle 4 can be used to guide the cable of the angle grinder 1 into the hollow handle 4 and tie it together with the cable of the display component 11, thus avoiding the problem of messy cables.

[0044] like Figures 8 to 10 As shown, in order to provide more installation space for the pressure sensor assembly while ensuring the quality of rust removal, preferably, the rust removal wheel 2 is a cup-shaped steel wire wheel.

[0045] Specifically, the cup-shaped wire wheel (also known as a bowl brush) is a rotary wire brush specifically designed for angle grinders, featuring a cup-shaped concave structure. The wire is made of high-carbon steel or stainless steel and is fixed to a metal flange by clamping or bristle attachment. It has a circular hole on its inner side, and the wire has a certain length, providing ample installation space for the pressure sensor assembly 10. This allows the pressure sensor assembly 10 to be directly mounted on the chuck or flange of the angle grinder 1.

[0046] In order to achieve the purpose of locking the height of the angle grinder and fixing the grinding depth, so as to make the grinding more uniform, the guide wheel 702 preferably adopts an "I" shaped structure.

[0047] Specifically, during rust removal, the guide wheel 702 employs an "I"-shaped structure, allowing it to engage with the outer side of thin-walled structures, such as the flanges of I-beams and H-beams. The length of the telescopic rod 6 can be adjusted as needed, ensuring the rust-removing wheel 2 contacts the steel structural member at the required depth. At this point, the height and grinding depth of the angle grinder 1 are fixed. Workers can simply pull the handle 4 to move the angle grinder 1, achieving uniform grinding depth on the steel structural member without needing to adjust the height of the handle 4, making it more convenient and labor-saving.

[0048] Compared with the prior art, the present invention has the following beneficial effects: 1. The steel structure pretreatment device on-site for civil engineering projects, equipped with horizontal adjustment components 5 and telescopic rods 6, allows for adjustment of the horizontal and vertical positions of the guide wheel assembly 7 as needed. This enables the device to adapt to steel structure components of different shapes and sizes. For example, when removing rust from square steel, the guide wheel assembly 7 is clamped on both sides of the square steel; when removing rust from the web of H-beams and I-beams, the guide wheel assembly 7 rests against the inner side of the flange or is clamped on the outer side of the flange; when removing rust from the flange plates of H-beams and I-beams, the guide wheel assembly 7 is clamped at both ends of the flange. Workers can pull the angle grinder 1 directly along the length of the steel, enabling rapid and uniform rust removal of the steel structure components, thus meeting the needs of steel structure pretreatment work on civil engineering construction sites.

[0049] 2. The steel structure pretreatment device on-site is rotatably connected to the horizontal adjustment component 5 via a telescopic rod 6. When removing rust from round steel, the telescopic rod 6 can be adjusted to tilt it, causing the guide wheel assembly 7 to abut against the side of the round steel, thus constraining the angle grinder 1. Furthermore, workers operate the angle grinder 1 by holding the handle 4, keeping their hands away from the rust removal wheel 2. This prevents accidental contact of the workers' hands with flying debris generated by the rust removal wheel 2 itself or its contact with the steel structure components, improving safety. Workers do not need to bend over or squat; simply pulling the handle 4 moves the angle grinder 1 directly along the length of the steel structure component, enabling rapid rust removal. This effectively improves pretreatment efficiency, ensures construction progress, reduces labor costs, and lowers project costs.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pretreatment device for steel structures at a civil engineering site, comprising an angle grinder, wherein a rust-removing wheel is provided on the output shaft of the angle grinder, characterized in that, The angle grinder is detachably connected to a mounting frame. On each side of the mounting frame, there is a set of adjustable horizontal adjustment components. The end of each horizontal adjustment component is provided with a telescopic rod. The telescopic rod includes a main rod, a telescopic sub-rod, and an adjustment rod that controls the extension and retraction of the sub-rod by rotation. The main rod is connected to the horizontal adjustment component, and the end of the sub-rod is provided with a guide wheel assembly that can rotate in the horizontal direction.

2. The steel structure pretreatment device for civil engineering sites according to claim 1, characterized in that: The main rod is rotatably connected to the end of the leveling component via a rotating shaft. One end of the rotating shaft is fixedly connected to a knob, and the knob is threaded with a locking bolt that can lock the knob.

3. The steel structure pretreatment device for civil engineering sites according to claim 2, characterized in that: The leveling component includes a threaded sleeve fixedly connected in the mounting bracket, a screw threadedly connected to the threaded sleeve, and a mounting frame rotatably connected to the end of the screw.

4. The steel structure pretreatment device for civil engineering sites according to claim 1, characterized in that: A grip bar for the user to hold is fixedly connected to the mounting bracket.

5. The steel structure pretreatment device for civil engineering sites according to claim 1, characterized in that: The guide wheel assembly includes a frame and a guide wheel rotatably connected within the frame.

6. The steel structure pretreatment device for civil engineering sites according to claim 5, characterized in that: The guide wheel adopts an "I" shaped structure.

7. The steel structure pretreatment device for civil engineering sites according to claim 1, characterized in that: The output end of the angle grinder is equipped with a pressure sensor assembly capable of wireless communication, and the handle is equipped with a display assembly capable of receiving the wireless signals emitted by the pressure sensor assembly.

8. The steel structure pretreatment device for civil engineering sites according to claim 7, characterized in that: The pressure sensor assembly includes a cylinder base fixedly connected to the angle grinder, a pressure sensor inserted into the cylinder base from the bottom, and a spring connecting the pressure sensor and the cylinder base.

9. The steel structure pretreatment device for civil engineering sites according to claim 8, characterized in that: The rust removal wheel is a cup-shaped steel wire wheel.

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