A steel bar cutting device for construction engineering

Abstract

The present invention discloses a steel bar cutting device for construction engineering, belonging to the field of construction steel bar processing, including a workbench; a fixing mechanism, including baffles and mounting plates symmetrically and fixedly installed on the top wall of the workbench, and a threaded rod cooperating with the baffles is threadedly installed on the side wall of the mounting plate; first, the distance between the end of the threaded rod and the baffle is adjusted according to the diameter of the steel bar, and then the steel bar is fixed through the clamping groove formed between the end of the threaded rod and the baffle. The cutting mechanism includes a hydraulic cylinder fixedly inserted on the side wall of the mounting plate, which can rotate quickly through a sleeve, so that when the steel bar fracture contacts the grinding sheet, the fracture of the steel bar can be polished, thus preventing the worker's palm from being scratched when the worker takes the steel bar; when the intercepted steel bar is short, the steel bar can be restricted under the action of the sleeve, so as to prevent the steel bar from flying off instantly during cutting, playing a role in improving safety.

Description

Technical Field

[0001] The present invention relates to the field of building steel bar processing, and more specifically, to a steel bar cutting device for building engineering. Background Art

[0002] In the construction of buildings, steel bars are usually tied into a cage-like structure to serve as the skeleton of building components. Before tying the steel bars, in order to ensure that the steel bar skeleton meets the construction requirements, the steel bars generally need to be cut to an appropriate length.

[0003] Chinese Patent (Publication No.: CN113634691B) is an extrusion-type steel bar cutting device based on mechanical processing. Multiple steel bars are clamped by two clamping plates, and then a cutting mechanism is used to simultaneously cut steel bars of different processing sizes.

[0004] Although the above patent can complete the cutting of steel bars of different specifications in one time during the working process, there are still the following deficiencies:

[0005] During the steel bar cutting process, the tool head contacts the steel bar and then applies a downward pressure to the steel bar. Under the action of the pressure, the steel bar is cut off. However, the fracture will bulge outwards and the surface of the bulging part of the fracture is sharp, which is likely to cut or pierce the gloves when the staff takes the steel bar, and finally cause scratches on the palm, which has a certain degree of danger. Summary of the Invention

[0006] 1. Technical Problems to be Solved

[0007] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a steel bar cutting device for building engineering, which can clean the burrs on the steel bar head.

[0008] 2. Technical Solutions

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] A steel bar cutting device for building engineering, comprising a workbench;

[0011] A fixing mechanism, comprising a baffle and a mounting plate symmetrically and fixedly installed on the top wall of the workbench, and a threaded rod matching with the baffle is installed on the side wall of the mounting plate; first, adjust the distance between the end of the threaded rod and the baffle according to the diameter of the steel bar, and then fix the steel bar through the clamping groove formed between the end of the threaded rod and the baffle;

[0012] A cutting mechanism, comprising a hydraulic cylinder fixedly inserted on the side wall of the mounting plate, and a tool head fixedly installed on the output end of the hydraulic cylinder; after the steel bar is fixed in the clamping groove, the hydraulic cylinder extends, the tool head applies pressure to the steel bar, and the steel bar is gradually cut off;

[0013] The grinding mechanism includes a mounting groove formed in the top wall of the workbench. An installation frame is fixedly installed in the mounting groove. A sleeve is rotatably installed on the installation frame, and abrasive sheets are provided on the inner wall of the sleeve. First, the steel bar is clamped in the clamping groove formed between the end of the threaded rod and the baffle, and then the steel bar is passed through the sleeve. After the cutting is completed, the cut steel bar is pulled out of the sleeve.

[0014] The driving mechanism includes a motor fixedly installed in the mounting groove. A gear is fixedly installed on the output end of the motor. An external gear ring meshing with the gear is fixedly sleeved on the outer wall of the sleeve. The motor drives the sleeve to rotate, and the abrasive sheets on the inner wall of the sleeve contact the sharp convex parts at the broken end of the steel bar, so as to be able to grind the sharp parts flat.

[0015] Furthermore, grooves are evenly formed in the inner wall of the sleeve, and balls are movably embedded in the grooves.

[0016] Furthermore, an annular groove is formed in the installation frame, and through holes communicating with the annular groove are evenly formed in the sleeve. A collection box is fixedly installed on the workbench. A conduit extending to the bottom wall of the annular groove is fixedly inserted on the top wall of the collection box, and a negative pressure mechanism cooperating with the collection box is provided on the workbench.

[0017] Furthermore, the negative pressure mechanism includes a limiting sleeve fixedly installed in the mounting groove. A fan blade is rotatably installed in the limiting sleeve. The output end of the motor extends into the limiting sleeve and is fixedly connected to the rotating shaft of the fan blade. A suction pipe extending into the collection box is fixedly inserted on the side wall of the limiting sleeve close to the motor.

[0018] Furthermore, a filter screen is fixedly installed in the collection box, and the filter screen covers the surface of the suction pipe.

[0019] Furthermore, brackets are symmetrically and fixedly installed on the top wall of the workbench. A guide plate is provided on each bracket, and the two guide plates are inclined.

[0020] Furthermore, a brush cooperating with the abrasive sheet is fixedly installed on the side wall of the guide plate. A cross bar is horizontally and movably inserted on the side wall of the bracket. A spring is fixedly installed between the cross bar and the bracket, and the guide plate is fixedly installed on the cross bar.

[0021] Furthermore, a water tank is fixedly installed on the top wall of the workbench. A water pipe extending to the surface of the guide plate is fixedly installed on the water tank.

[0022] Furthermore, an elastic air bag is fixedly installed between the bracket and the guide plate. The output end of the elastic air bag extends into the water tank. An air inlet valve and an air outlet valve are fixedly installed on the top wall of the water tank, and the air outlet valve is communicated with the water pipe.

[0023] Furthermore, a return pipe extending to the bottom wall of the mounting groove is fixedly installed on the air inlet valve.

[0024] 3. Beneficial Effects

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] (1) In this solution, the sleeve rotates rapidly, so that when the sleeve contacts the steel bar fracture, the steel bar fracture can be polished, thus preventing the worker's palm from being scratched when the worker picks up the steel bar; when the intercepted steel bar is short, the sleeve can limit the intercepted steel bar, thus preventing the steel bar from flying off instantly during the truncation, playing a role in improving safety.

[0027] (2) Under the action of the ball bearings, the friction force received by the steel bar is rolling friction, thus reducing the friction force received by the steel bar and facilitating the worker to take out the steel bar; and the ball bearings protrude from the grooves. Therefore, when the steel bar penetrates the sleeve, only the surface of the steel bar contacts the ball bearings. Therefore, when the steel bar is pulled out of the sleeve, only the sharp part protruding on the cross-section of the steel bar contacts the grinding sheet, so that the wear degree of the grinding sheet can be reduced, the replacement frequency of the grinding sheet is reduced, and the cost is saved.

[0028] (3) During the process of the external air flow flowing into the sleeve, the air flow impacts the surface of the grinding sheet. At this time, the particles on the surface of the grinding sheet are affected by the impact force of the air flow, and the particles on the surface of the grinding sheet can be cleaned under the action of the impact force of the air flow, so as to ensure that the surface of the grinding sheet remains rough for a long time and reduce the replacement frequency of the grinding sheet. Description of the Drawings

[0029] Figure 1 is the first three-dimensional structural schematic diagram of the present invention;

[0030] Figure 2 is of the present invention Figure 1 the enlarged view of part A in;

[0031] Figure 3 is the second three-dimensional structural schematic diagram of the present invention;

[0032] Figure 4 is of the present invention Figure 2 the enlarged view of part B in;

[0033] Figure 5 is the cross-sectional view of the workbench of the present invention;

[0034] Figure 6 is the combined view of the reflux pipe and the installation groove of the present invention;

[0035] Figure 7 is the cross-sectional view of the collection box of the present invention;

[0036] Figure 8 is the combined view of the mounting plate, hydraulic cylinder, threaded rod and cutter head of the present invention.

[0037] Description of reference numerals in the figure:

[0038] 1. Workbench; 2. Baffle; 3. Mounting plate; 4. Threaded rod; 5. Hydraulic cylinder; 6. Tool bit; 7. Mounting bracket; 8. Sleeve; 9. Grinding sheet; 10. Motor; 11. Gear; 12. External gear ring; 13. Ball; 14. Annular groove; 15. Through hole; 16. Collection box; 17. Conduit; 18. Limit sleeve; 19. Fan blade; 20. Straw; 21. Filter screen; 22. Bracket; 23. Guide plate; 24. Brush; 25. Cross bar; 26. Spring; 27. Water tank; 28. Water pipe; 29. Elastic airbag; 30. Intake valve; 31. Exhaust valve; 32. Return pipe. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] Embodiment 1:

[0043] Please refer to Figure 1-8 , a steel bar cutting device for construction engineering, including a workbench 1;

[0044] Fixing mechanism, including a baffle plate 2 and a mounting plate 3 symmetrically and fixedly installed on the top wall of the workbench 1. A threaded rod 4 cooperating with the baffle plate 2 is threadedly installed on the side wall of the mounting plate 3. First, adjust the distance between the end of the threaded rod 4 and the baffle plate 2 according to the diameter of the steel bar, and then fix the steel bar through the clamping groove formed between the end of the threaded rod 4 and the baffle plate 2.

[0045] Cutting mechanism, including a hydraulic cylinder 5 fixedly inserted on the side wall of the mounting plate 3. A cutter head 6 is fixedly installed on the output end of the hydraulic cylinder 5. After the steel bar is fixed in the clamping groove, the hydraulic cylinder 5 extends, and the cutter head 6 applies pressure to the steel bar, and the steel bar is gradually cut off.

[0046] Grinding mechanism, including a mounting groove opened on the top wall of the workbench 1. A mounting frame 7 is fixedly installed in the mounting groove. A sleeve 8 is rotatably installed on the mounting frame 7, and an abrasive sheet 9 is provided on the inner wall of the sleeve 8. First, clamp the steel bar in the clamping groove formed between the end of the threaded rod 4 and the baffle plate 2, and then pass the steel bar through the sleeve 8. After the cutting is completed, pull out the cut steel bar from the sleeve 8.

[0047] Driving mechanism, including a motor 10 fixedly installed in the mounting groove. A gear 11 is fixedly installed on the output end of the motor 10. An external gear ring 12 meshing with the gear 11 is fixedly sleeved on the outer wall of the sleeve 8. The motor 10 drives the sleeve 8 to rotate, and the abrasive sheet 9 on the inner wall of the sleeve 8 contacts the sharp protruding part at the fracture of the steel bar, so as to be able to grind the sharp part flat.

[0048] First, place the steel bar between the mounting plate 3 and the baffle plate 2, then pass the steel bar through the sleeve 8, and adjust the threaded rod 4 so that the end of the threaded rod 4 tightly presses the steel bar, so that the steel bar is closely attached to the baffle plate 2. Then start the hydraulic cylinder 5, and the cutter head 6 is driven by the output end of the hydraulic cylinder 5 to apply pressure to the steel bar, and the steel bar can be cut off under the action of the pressure.

[0049] When the steel bar is cut off, start the motor 10. The output end of the motor 10 drives the gear 11 to rotate. During the rotation of the gear 11, the gear 11 drives the sleeve 8 to rotate rapidly through the external gear ring 12, so as to be able to grind the fracture of the steel bar when it contacts the abrasive sheet 9, so as to prevent the worker's palm from being scratched when the worker takes the steel bar, playing a role in improving safety.

[0050] When the intercepted steel bar is short, the sleeve 8 can limit the intercepted steel bar, so as to prevent the steel bar from flying off instantly during cutting, playing a role in improving safety.

[0051] And the sleeve 8 can hinder the cut steel bar head. When the cut steel bar is short, it can prevent the steel bar from flying off, playing a role in improving construction safety.

[0052] Specifically, as Figure 2 shown, grooves are evenly formed on the inner wall of the sleeve 8, and balls 13 are movably embedded in the grooves.

[0053] During the process of pulling the steel bar out of the sleeve 8, under the action of the balls 13, the friction force on the steel bar is rolling friction, thereby reducing the friction force on the steel bar, which facilitates the staff to take out the steel bar; and the balls 13 protrude from the grooves. Therefore, when the steel bar penetrates the sleeve 8, only the surface of the steel bar contacts the balls 13. Therefore, when the steel bar is pulled out of the sleeve 8, only the sharp parts protruding from the cross-section of the steel bar contact the abrasive sheet 9, which can reduce the wear degree of the abrasive sheet 9, reduce the replacement frequency of the abrasive sheet 9, and play a role in cost saving.

[0054] Specifically, as Figure 5 shown, an annular groove 14 is formed on the mounting frame 7, and through holes 15 communicating with the annular groove 14 are evenly formed on the sleeve 8. A collection box 16 is fixedly installed on the workbench 1, a conduit 17 extending to the inner bottom wall of the annular groove 14 is fixedly inserted on the top wall of the collection box 16, and a negative pressure mechanism cooperating with the collection box 16 is arranged on the workbench 1.

[0055] The negative pressure mechanism includes a limit sleeve 18 fixedly installed in the installation groove. A fan blade 19 is rotatably installed in the limit sleeve 18. The output end of the motor 10 extends into the limit sleeve 18 and is fixedly connected to the rotating shaft of the fan blade 19. A suction pipe 20 extending into the collection box 16 is fixedly inserted on the side wall of the limit sleeve 18 close to the motor 10.

[0056] A filter screen 21 is fixedly installed in the collection box 16, and the filter screen 21 covers the surface of the suction pipe 20.

[0057] During the working process, the motor 10 drives the fan blade 19 to rotate. At this time, the gas in the limit sleeve 18 is discharged by the fan blade 19. Therefore, a negative pressure state is formed in the limit sleeve 18. At this time, the limit sleeve 18 sucks air from the collection box 16 through the suction pipe 20. Therefore, a negative pressure state is formed in the collection box 16. At this time, the collection box 16 sucks air from the inside of the sleeve 8 through the conduit 17, the annular groove 14 and the through holes 15. Therefore, the external air flow will flow into the sleeve 8. During the process of the external air flow flowing towards the inside of the sleeve 8, the air flow impacts the surface of the abrasive sheet 9. At this time, the particles on the surface of the abrasive sheet 9 are subjected to the impact force of the air flow. Under the action of the impact force of the air flow, the particles on the surface of the abrasive sheet 9 can be cleaned off, so as to ensure that the surface of the abrasive sheet 9 remains rough for a long time, reduce the replacement frequency of the abrasive sheet 9, and play a role in improving work efficiency.

[0058] The particulate matter removed from the frosted sheet 9 passes through the through holes 15, the annular groove 14, and the conduit 17 with the air flow and enters the collection box 16. And under the action of the filter screen 21, it can prevent the particulate matter from being discharged into the air when the collection box 16 exhausts through the suction pipe 20, so that the particulate matter can be collected, playing a role in preventing the particulate matter from suspending in the air and affecting the health of the staff.

[0059] The air flow discharged from the limit sleeve 18 impacts the surface of the cutter head 6, so that the cutter head 6 can be cooled during high-frequency operation, preventing the temperature of the cutter head 6 from being too high, playing a role in preventing the cutter head 6 from deforming due to high-temperature softening.

[0060] Specifically, as Figure 4 shown, brackets 22 are symmetrically and fixedly installed on the top wall of the workbench 1. Each bracket 22 is provided with a guide plate 23, and the two guide plates 23 are inclined.

[0061] Since the steel bar needs to pass through the sleeve 8 during the working process, the guide plate 23 can guide the steel bar, so as to ensure that the steel bar can accurately enter the sleeve 8. Therefore, during the process of inserting the steel bar into the sleeve 8, it can prevent the sharp part of the steel bar from rubbing against the side wall of the frosted sheet 9, playing a role in extending the service life of the frosted sheet 9.

[0062] Specifically, as Figure 2 shown, a brush 24 matching with the frosted sheet 9 is fixedly installed on the side wall of the guide plate 23. A cross bar 25 is horizontally and movably inserted into the side wall of the bracket 22. A spring 26 is fixedly installed between the cross bar 25 and the bracket 22, and the guide plate 23 is fixedly installed on the cross bar 25.

[0063] In the initial state, under the action of the spring 26, the two guide plates 23 are close to each other; when the steel bar moves along the guide plate 23, the distance between the two guide plates 23 gradually increases. At this time, the guide plate 23 drives the brush 24 to apply pressure to the frosted sheet 9. Therefore, when the roller drives the frosted sheet 9 to rotate, it can clean the frosted sheet 9 more deeply, improving the cleaning effect on the frosted sheet 9 and playing a role in ensuring that the frosted sheet 9 remains clean.

[0064] Since the pressure between the brush 24 and the frosted sheet 9 can be changed, when the diameter of the steel bar is small, it can prevent the frosted sheet 9 from being subjected to a large frictional force, playing a role in reducing the wear degree of the frosted sheet 9.

[0065] Specifically, as Figure 2 shown, a water tank 27 is fixedly installed on the top wall of the workbench 1, and a water pipe 28 extending to the surface of the guide plate 23 is fixedly installed on the water tank 27.

[0066] An elastic airbag 29 is fixedly installed between the support 22 and the guide plate 23. The output end of the elastic airbag 29 extends into the water tank 27. An air inlet valve 30 and an exhaust valve 31 are fixedly installed on the top wall of the water tank 27, and the exhaust valve 31 is communicated with the water pipe 28.

[0067] When the guide plate 23 is pushed by the steel bar, the guide plate 23 applies pressure to the elastic airbag 29. At this time, the gas in the elastic airbag 29 enters the water tank 27. Therefore, under the action of the air inlet valve 30 and the exhaust valve 31, the pressure in the water tank 27 increases. At this time, under the action of the air pressure, the water in the water tank 27 flows out along the water pipe 28. At this time, the water is sprayed on the surface of the guide plate 23, so that a water film can be formed on the surface of the guide plate 23. Therefore, when the end of the steel bar rubs against the guide plate 23, the friction force received by the guide plate 23 is reduced, which plays a role in prolonging the service life of the guide plate 23; since the air flow discharged from the limit sleeve 18 will pass through the surface of the guide plate 23, and when the air flow passes through the wet surface of the guide plate 23, the heat of the air flow will be absorbed by the water, so that the air flow can be cooled, so the heat dissipation effect on the tool bit 6 is further improved; and by cooling the tool bit 6 with low-temperature gas, compared with directly spraying cold water, the tool bit 6 can be kept dry, which plays a role in preventing the tool bit 6 from being corroded.

[0068] When the steel bar is separated from the contact with the guide plate 23, the elastic airbag 29 is restored. At this time, the water tank 27 sucks air from the outside through the air inlet valve 30, thus playing a role in preparing for spraying water again.

[0069] Specifically, as Figure 2 、 Figure 6 shown, a return pipe 32 extending to the bottom wall of the installation groove is fixedly installed on the air inlet valve 30.

[0070] When the water flow is sprayed on the surface of the guide plate 23, under the action of gravity, the water flow flows downward along the guide plate 23 and finally separates from the guide plate 23, and then drops into the installation groove. Therefore, when the water tank 27 sucks air through the return pipe 32, the water in the installation groove will be sucked into the water tank 27 again, thus realizing the reuse of water, playing a role in saving resources, and in the process of reuse, there is no need for the staff to frequently add water to the water tank 27, thus playing a role in reducing the labor intensity of the staff.

[0071] Working principle: First, place the steel bar between the mounting plate 3 and the baffle 2, then make the steel bar pass through the sleeve 8, and adjust the threaded rod 4 so that the end of the threaded rod 4 tightly presses the steel bar, so that the steel bar is closely attached to the baffle 2; then start the motor 10, drive the sleeve 8 to rotate through the motor 10, and then start the hydraulic cylinder 5, drive the tool bit 6 to apply pressure to the steel bar through the output end of the hydraulic cylinder 5, and the steel bar can be cut off under the action of the pressure.

[0072] After the steel bar is cut off, pull the steel bar to take it out of the sleeve 8. During this process, the sleeve 8 drives the abrasive sheet 9 to rotate rapidly, so that when the steel bar fracture contacts the abrasive sheet 9, the steel bar fracture can be polished. At the same time, the airflow blown by the fan blade 19 blows towards the surface of the cutter head 6 to dissipate heat from the cutter head 6. During the process of the fan blade 19 blowing air, the collection box 16 sucks air from the outside through the annular groove 14, the through hole 15 and the sleeve 8. During the process of the airflow passing through the sleeve 8, the airflow impacts the abrasive sheet 9, so that the impurities on the abrasive sheet 9 can be cleaned up.

[0073] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A steel bar cutting device for construction engineering, characterized in that: It includes a workbench (1); A fixing mechanism, which includes a baffle (2) and a mounting plate (3) symmetrically and fixedly installed on the top wall of the workbench (1). A threaded rod (4) that cooperates with the baffle (2) is threadedly installed on the side wall of the mounting plate (3). First, adjust the distance between the end of the threaded rod (4) and the baffle (2) according to the diameter of the steel bar, and then fix the steel bar through the clamping groove formed between the end of the threaded rod (4) and the baffle (2); A cutting mechanism, which includes a hydraulic cylinder (5) fixedly inserted on the side wall of the mounting plate (3). A cutter head (6) is fixedly installed on the output end of the hydraulic cylinder (5). After the steel bar is fixed in the clamping groove, the hydraulic cylinder (5) extends, and the cutter head (6) applies pressure to the steel bar, and the steel bar is gradually cut off; A grinding mechanism, which includes a mounting groove opened on the top wall of the workbench (1). A mounting frame (7) is fixedly installed in the mounting groove. A sleeve (8) is rotatably installed on the mounting frame (7), and abrasive sheets (9) are provided on the inner wall of the sleeve (8). First, clamp the steel bar in the clamping groove formed between the end of the threaded rod (4) and the baffle (2), and then pass the steel bar through the sleeve (8). After the cutting is completed, pull out the cut steel bar from the sleeve (8); A driving mechanism, which includes a motor (10) fixedly installed in the mounting groove. A gear (11) is fixedly installed on the output end of the motor (10). An external gear ring (12) that meshes with the gear (11) is fixedly sleeved on the outer wall of the sleeve (8). The motor (10) drives the sleeve (8) to rotate, and the abrasive sheets (9) on the inner wall of the sleeve (8) contact the sharp protruding parts at the broken end of the steel bar, so as to be able to grind the sharp parts flat; Grooves are evenly opened on the inner wall of the sleeve (8), and balls (13) are movably embedded in the grooves; An annular groove (14) is opened on the mounting frame (7), and through holes (15) communicating with the annular groove (14) are evenly opened on the sleeve (8). A collection box (16) is fixedly installed on the workbench (1). A conduit (17) extending to the bottom wall of the annular groove (14) is fixedly inserted on the top wall of the collection box (16), and a negative pressure mechanism cooperating with the collection box (16) is provided on the workbench (1); The negative pressure mechanism includes a limit sleeve (18) fixedly installed in the mounting groove. A fan blade (19) is rotatably installed in the limit sleeve (18). The output end of the motor (10) extends into the limit sleeve (18) and is fixedly connected to the rotating shaft of the fan blade (19). A suction pipe (20) extending into the collection box (16) is fixedly inserted on the side wall of the limit sleeve (18) close to the motor (10); A filter screen (21) is fixedly installed in the collection box (16), and the filter screen (21) covers the surface of the suction pipe (20); Brackets (22) are symmetrically and fixedly installed on the top wall of the workbench (1). A guide plate (23) is provided on each bracket (22), and the two guide plates (23) are inclined; A brush (24) cooperating with the abrasive sheet (9) is fixedly installed on the side wall of the guide plate (23). A cross bar (25) is horizontally movably inserted into the side wall of the bracket (22). A spring (26) is fixedly installed between the cross bar (25) and the bracket (22), and the guide plate (23) is fixedly installed on the cross bar (25). A water tank (27) is fixedly installed on the top wall of the workbench (1). A water pipe (28) extending to the surface of the guide plate (23) is fixedly installed on the water tank (27). An elastic airbag (29) is fixedly installed between the bracket (22) and the guide plate (23). The output end of the elastic airbag (29) extends into the water tank (27). An air inlet valve (30) and an exhaust valve (31) are fixedly installed on the top wall of the water tank (27), and the exhaust valve (31) is communicated with the water pipe (28).

2. The steel bar cutting device for construction engineering according to claim 1, wherein: A return pipe (32) extending to the bottom wall of the installation groove is fixedly installed on the air inlet valve (30).

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