H-shaped steel automatic positioning cutting processing device for steel structure construction

Abstract

The application relates to the technical field of H-shaped steel cutting processing, in particular to an automatic positioning and cutting processing device for H-shaped steel used in steel structure construction. The device comprises a roller conveyor, a cutting table, a saw blade, a rotary motor, a support, a hydraulic cylinder, a pressing plate, a linear electric guide rail, a moving plate, an electric push rod, a pressing wheel, a pump body, a liquid supply pipe, a spray pipe, an electromagnetic reversing valve, a trigger assembly, a cooling box and a cooling pipe. The pressing wheel is driven by the electric push rod to clamp and position the H-shaped steel from both sides, the pressing plate is driven by the hydraulic cylinder to press from above, and the automatic positioning of the H-shaped steel in all directions is realized. The proximity switch and the induction metal plate trigger the cooling liquid spraying, the accurate and timed cooling of the saw blade is realized, and the cooling liquid is recycled after being filtered and air-cooled in the cooling box. The application solves the problems of cutting inclination caused by the absence of lateral positioning in the prior art, short saw blade cooling time and serious waste of cooling liquid, and has the characteristics of accurate positioning, efficient cooling, energy saving and environmental protection.

Description

Technical Field

[0001] This invention relates to the field of H-beam cutting and processing technology, and in particular to an automatic positioning and cutting device for H-beams used in steel structure construction. Background Technology

[0002] H-beams are an economical and efficient structural material with a more optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. They are named for their cross-section, which resembles the letter H. Because all parts of an H-beam are arranged at right angles, they offer advantages such as strong bending resistance in all directions, convenient construction, steel savings, and lightweight structure, and have been widely used.

[0003] Currently, H-beam cutting is divided into laser cutting and saw blade cutting. Saw blade cutting allows for a larger cut cross-section. During H-beam cutting, the H-beam is pushed onto the saw blade cutting station. Then, a pressing structure above the H-beam descends, contacts and presses against it, achieving positioning. Finally, the high-speed rotating saw blade moves along the path, contacting and sawing the H-beam to complete the cutting process. Existing saw blade cutting equipment requires pressing and positioning the H-beam before cutting, but the existing positioning structure can only position the top of the H-beam, not its sides. This causes the H-beam to shift laterally during the actual cutting process, resulting in problems such as skewed cuts. After cutting H-beams, the saw blade rotates and comes into contact with the H-beams, causing friction between the saw blade and the H-beams during the cutting process, which leads to high temperatures on the saw blade. Therefore, it is necessary to cool the saw blade. Existing cooling technology sprays coolant onto the saw blade through a nozzle to achieve cooling. However, the cooling time of existing saw blades is short, and it is not possible to fully cool the saw blade within a certain period of time. At the same time, coolant is continuously sprayed out during cooling and cutting, resulting in coolant waste. Summary of the Invention

[0004] In order to overcome the shortcomings of existing H-beam saw blade cutting equipment, such as the lack of lateral positioning leading to skewed cutting, and the short cooling time of the saw blade and serious waste of coolant, this invention provides an automatic positioning and cutting device for H-beams used in steel structure construction.

[0005] An automatic positioning and cutting device for H-beams used in steel structure construction includes a roller conveyor, a cutting table, a moving plate, a saw blade, a rotary motor, a support frame, a hydraulic cylinder, and a pressure plate. The roller conveyor is used to transport the H-beams. A cutting table is set on the front side of the roller conveyor, and a feeding mechanism is installed inside the cutting table. The cutting end of the feeding mechanism is connected to a saw blade, which is driven to rotate by the rotary motor. Support frames are installed on the left and right sides of the cutting table, and hydraulic cylinders are installed on the supports. The extension and retraction ends of the hydraulic cylinders face downward and are connected to the pressure plate. Side pressing components are provided on the left and right sides of the H-beam cutting position. The side pressing components include a driving component and a pressing component. The pressing component clamps the H-beam from the side under the action of the driving component.

[0006] Preferably, the feeding mechanism is a linear electric guide rail, and a moving plate is connected to the moving end of the linear electric guide rail, with saw blades installed at the left and right ends of the moving plate.

[0007] Preferably, the cutting trajectories of the left and right saw blades are located on the same plane, and they rotate symmetrically and alternately to perform cutting operations, wherein the left saw blade rotates clockwise and the right saw blade rotates counterclockwise.

[0008] Preferably, the driving component is an electric push rod, the pressing component is a clamping wheel, and electric push rods are respectively installed on the left and right side walls of the upper part of the cutting table. The telescopic end of the electric push rod is connected to a clamping wheel for lateral clamping of H-beams.

[0009] Preferably, the device further includes a pump body, a liquid supply pipe, a nozzle, an electromagnetic reversing valve, a liquid guide frame, a cooling tank, and a triggering component. A cooling tank is located on the right side of the cutting table, and a pump body is installed on the side wall of the cutting table. The inlet end of the pump body is connected to the bottom of the cooling tank, and the outlet end of the pump body is connected to two nozzles through the same liquid supply pipe. The outlet ends of the two nozzles pass through the side wall of the cutting table and point to the cutting path of the saw blade on the corresponding side. The liquid supply pipe is connected to one of the two nozzles through a three-position three-way electromagnetic reversing valve. A triggering component is installed inside the cutting table. The electromagnetic reversing valve is electrically connected to the triggering component and switches the conduction state between the left and right nozzles and the liquid supply pipe according to the detection signal of the triggering component. A liquid guide frame is detachably installed at the bottom of the cutting table. A liquid guide pipe is installed on the right side of the liquid guide frame, and the bottom surface of the liquid guide frame is higher on the left and lower on the right. The liquid guide pipe of the liquid guide frame passes through the cutting table and connects to the inside of the cooling tank.

[0010] Preferably, the triggering component includes a proximity switch and a sensing metal plate. The sensing metal plate is mounted on the moving plate, and proximity switches are mounted on both side walls of the cutting table. The proximity switches and the sensing metal plate are arranged on the same straight line. When the sensing metal plate moves with the moving plate into the detection range of the left proximity switch, the proximity switch outputs an electrical signal to the solenoid reversing valve, controlling the solenoid reversing valve to connect the liquid supply pipe and the left nozzle, while simultaneously cutting off the right nozzle. When the sensing metal plate moves into the detection range of the right proximity switch, the solenoid reversing valve switches to connect the liquid supply pipe and the right nozzle.

[0011] Preferably, it also includes a filter frame, a locking rod, and limiting posts. The inner wall of the cooling box has a through hole through which the liquid guide tube of the liquid guide frame passes. Two limiting posts are symmetrically installed on the inner wall of the cooling box around the through hole. The filter frame is snapped between the two limiting posts. The liquid guide tube of the liquid guide frame extends into the filter frame. The edge of the filter frame is detachably connected to the inner wall of the cooling box through the locking rod.

[0012] Preferably, it also includes cooling pipes and a cold air fan. Cooling pipes are evenly arranged inside the cooling box. The cooling pipes are hollow and penetrate two opposite side walls of the cooling box. A cold air fan is installed on the outer wall of the cooling box. The air outlet of the cold air fan is connected to the air inlet of the cooling pipes.

[0013] Preferably, the pressure rollers at the telescopic end of the same electric push rod are located on the front and rear sides of the saw blade on the same side, and a stabilizing plate is connected between the pressure rollers. A guide frame is installed inside the cutting table, and the bearing seat of the rotating motor shaft is slidably embedded in the groove of the guide frame.

[0014] The beneficial effects of this invention are: 1. This invention uses an electric push rod to drive the clamping rollers to clamp and position the H-beam from both sides, and a hydraulic cylinder-driven pressure plate to press it from above, achieving automatic clamping and positioning from the top and bottom and the side. This effectively avoids lateral displacement of the H-beam during the cutting process, significantly improves cutting accuracy and stability, and overcomes the defects of existing technologies that can only press the top and lack lateral constraints, resulting in skewed cutting.

[0015] 2. The present invention uses a triggering component consisting of a proximity switch and an induction metal plate. Coolant spraying is triggered only when the saw blade moves to the nozzle position, which realizes precise timed cooling of the saw blade. This ensures that the saw blade is sufficiently cooled and avoids continuous spraying of coolant, greatly reducing coolant consumption and solving the problems of short cooling time and serious waste in the prior art.

[0016] 3. This invention collects the used coolant through a liquid guide frame, filters it through a filter frame to remove metal debris, and then cools it down by air cooling pipes in a cooling tank, thus realizing the recycling and reuse of the coolant, further reducing production costs and environmental pollution.

[0017] 4. This invention adopts a double-saw blade symmetrical rotation cutting method, resulting in a flat cutting surface and high cutting efficiency; the guide frame slides to guide the bearing seat of the rotary motor, and the pressure roller is connected to the stabilizing plate, ensuring the stability and reliability of the equipment operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the roller conveyor, cutting table, and saw blade of the present invention.

[0020] Figure 3 This is a structural schematic diagram of the linear electric guide rail, moving plate, and guide frame components of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the electric push rod, pressure wheel, and stabilizing plate of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the bracket, hydraulic cylinder, and pressure plate of the present invention.

[0023] Figure 6This is a schematic diagram of the structure of the pump body, liquid supply pipe, and nozzle of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the electromagnetic reversing valve, liquid guide frame, and liquid guide tube of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the filter frame, locking rod, and limiting post of the present invention.

[0026] Figure 9 This is a schematic diagram of the structure of components such as the cooling pipe and the air cooler of the present invention.

[0027] The labels in the attached diagram are as follows: 1-roller conveyor, 100-H-beam, 2-cutting table, 201-moving plate, 202-saw blade, 203-rotary motor, 3-support, 301-hydraulic cylinder, 302-pressure plate, 4-linear electric guide rail, 400-pressure roller, 401-electric push rod, 402-pump body, 403-liquid supply pipe, 404-nozzle, 405-electromagnetic reversing valve, 406-proximity switch, 407-induction metal plate, 408-stabilizing plate, 409-guide frame, 5-liquid guide frame, 501-liquid guide pipe, 6-cooling box, 601-filter frame, 602-locking rod, 603-limiting post, 7-cooling pipe, 701-cooling fan. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0029] An automatic positioning and cutting device for H-beams used in steel structure construction, such as Figure 1-9As shown, the system includes a roller conveyor 1, a cutting table 2, a moving plate 201, a saw blade 202, a rotary motor 203, a support 3, a hydraulic cylinder 301, and a pressure plate 302. The roller conveyor 1 is used to transport H-beams 100. A cutting table 2 is provided on the front side of the roller conveyor 1. A feeding mechanism is installed inside the cutting table 2. The cutting end of the feeding mechanism is connected to a saw blade 202. The left and right saw blades 202 are arranged at intervals along the feeding direction. During a single feeding process, only one side of the saw blade 202 contacts and cuts the H-beam 100, while the other side of the saw blade 202 keeps rotating but does not participate in the cutting. The two saw blades 202 alternately undertake the cutting task. In this embodiment, the feeding mechanism is a linear electric guide rail 4. The moving end of the linear electric guide rail 4 is connected to the moving plate 201, and the saw blades 202 are installed at the left and right ends of the moving plate 201. The saw blade 202 is driven to rotate by a rotary motor 203. The cutting paths of the left and right saw blades 202 are located on the same plane, and they rotate symmetrically and alternately to perform cutting operations. The left saw blade 202 rotates clockwise, and the right saw blade 202 rotates counterclockwise. Supports 3 are installed on the left and right sides of the cutting table 2. Hydraulic cylinders 301 are installed on the supports 3. The extension end of the hydraulic cylinder 301 faces downward and is connected to a pressure plate 302. The pressure plate 302 is located directly above the conveying path of the H-beam 100. Side pressure components are provided on the left and right sides of the cutting position of the H-beam 100. The side pressure components include a driving component and a pressing component. The pressing component clamps the H-beam 100 from the side under the action of the driving component. In this embodiment, the driving component is an electric push rod 401, and the pressing component is a clamping wheel 400. The electric push rod 401 is installed on the upper left and right side walls of the cutting table 2. The telescopic end of the electric push rod 401 is connected to a clamping wheel 400 for lateral clamping of the H-beam 100. The clamping wheel 400 allows the H-beam 100 to adjust slightly forward and backward during the conveying process, while providing lateral constraint. The surface of the clamping wheel 400 is covered with rubber material to reduce scratches. Furthermore, the pressure rollers 400 at the telescopic end of the same electric push rod 401 are located on the front and rear sides of the saw blade 202 on the same side, and a stabilizing plate 408 is connected between the pressure rollers 400. The stabilizing plate 408 can fix the positions of the pressure rollers 400 located on the front and rear sides of the saw blade 202 on the same side, providing stable pressure when pressing the side of the H-beam 100. While not interfering with the movement of the saw blade 202, it improves the overall strength of the telescopic shaft of the electric push rod 401 and the pressure rollers 400. A guide frame 409 is installed in the cutting table 2. The bearing seat of the rotating shaft of the rotary motor 203 is slidably embedded in the groove of the guide frame 409. The guide frame 409 is used to slide and guide the bearing seat of the rotary motor 203, thereby indirectly limiting the left and right movement of the saw blade 202 and improving the stability and accuracy of cutting.

[0030] During the cutting operation, the roller conveyor 1 transports the H-beam 100 to the cutting table 2, positioning the section to be cut directly below the pressure plate 302 and between the two saw blades 202. The roller conveyor 1 then pauses transporting, and the hydraulic cylinder 301 and electric push rod 401 are simultaneously activated: the hydraulic cylinder 301 drives the pressure plate 302 to press down, achieving vertical positioning of the H-beam 100; the electric push rod 401 pushes the clamping roller 400 to clamp the H-beam 100 from both sides, completing lateral positioning; then the rotary motor 203 is activated to drive the saw blade 202 to rotate, and the linear electric guide rail 4 drives the moving plate 201 to move to the right. At this time, the H-beam 100 contacts the left saw blade 202 and completes the cutting, while the right saw blade 202 idles; after cutting is completed, the hydraulic cylinder 301 and electric push rod 401 retract to release the H-beam 100. 0. The roller conveyor 1 continues to transport the H-beam 100 forward to one station, so that the next section to be cut reaches the cutting position. Then, the conveyor pauses again, and the linear electric guide rail 4 drives the moving plate 201 to move to the left for the next cut. At this time, the H-beam 100 contacts the right saw blade 202 and completes the cut, while the left saw blade 202 idles. The two saw blades 202 alternately undertake the cutting task. In this alternating operation, the saw blade 202 has a certain rest time after each cut. As the roller conveyor 1 continues to transport the H-beam 100, the previously cut section of H-beam 100 is pushed out by the continuous transport of the subsequent H-beam 100 and then collected by the collecting device. The alternating operation of the two saw blades 202 allows one side of the saw blade 202 to cool down during the interval, which helps to extend the service life of the saw blade 202. Meanwhile, in order to improve the stability of the position of the H-beam 100 during cutting, the electric push rod 401 extends to drive the pressure roller 400 to press the side of the H-beam 100, which fixes the position of the H-beam 100 and prevents it from being cut off-center. Example 2

[0031] Based on Example 1, such as Figure 6 and Figure 7As shown, it also includes a pump body 402, a liquid supply pipe 403, a nozzle 404, a solenoid directional valve 405, a liquid guide frame 5, a cooling tank 6, and a triggering assembly. A cooling tank 6 is located on the right side of the cutting table 2. The pump body 402 is mounted on the side wall of the cutting table 2. The inlet end of the pump body 402 is connected to the bottom of the cooling tank 6. The outlet end of the pump body 402 is connected to two nozzles 404 via the same liquid supply pipe 403. The outlet ends of the two nozzles 404 penetrate the side wall of the cutting table 2 and point to the cutting path of the saw blade 202 on the corresponding side. The liquid supply pipe 403 is connected to one of the two nozzles 404 via a three-position three-way solenoid directional valve 405. The cutting table 2... An internal triggering component is provided. The electromagnetic reversing valve 405 is electrically connected to the triggering component and switches the conduction state between the left and right nozzles 404 and the liquid supply pipe 403 according to the detection signal of the triggering component. A liquid guide frame 5 is detachably installed at the bottom of the cutting table 2. A liquid guide pipe 501 is provided on the right side of the liquid guide frame 5. The bottom surface of the liquid guide frame 5 is higher on the left and lower on the right. Specifically, the liquid guide frame 5 is arranged at an angle along the width direction of the H-beam 100. The side away from the cooling box 6 is higher and the side closer to the cooling box 6 is lower, so that the coolant can flow out from the liquid guide pipe 501 of the liquid guide frame 5. The liquid guide pipe 501 of the liquid guide frame 5 passes through the cutting table 2 and communicates with the interior of the cooling box 6. The triggering components include a proximity switch 406 and a sensing metal plate 407. At least one sensing metal plate 407 is mounted on the moving plate 201. Proximity switches 406 are mounted on both side walls of the cutting table 2. The proximity switches 406 and the sensing metal plate 407 are arranged on the same straight line. When the sensing metal plate 407 moves with the moving plate 201 into the detection range of the left proximity switch 406, the proximity switch 406 outputs an electrical signal to the controller. The controller controls the solenoid reversing valve 405 to connect the liquid supply pipe 403 and the left nozzle 404, while simultaneously cutting off the right nozzle 404. When the sensing metal plate 407 moves into the detection range of the right proximity switch 406, the solenoid reversing valve 405 switches to connect the liquid supply pipe 403 and the right nozzle 404.

[0032] When the linear electric guide rail 4 drives the moving plate 201 to move the saw blade 202 to the corresponding position of the nozzle 404, the sensing metal plate 407 on the moving plate 201 moves along with it. When the sensing metal plate 407 enters the detection range of the proximity switch 406 on one side, the proximity switch 406 receives the reflected signal and outputs a signal to trigger the electromagnetic reversing valve 405 to connect the liquid supply pipe 403 with the nozzle 404 on the corresponding side, so that the nozzle 404 on that side sprays out coolant to cool the saw blade 202 on the same side. Since the saw blade 202 is in a rotating state, the coolant can evenly cover the surface of the saw blade 202 to achieve comprehensive cooling. When the saw blades 202 switch back and forth, the electromagnetic reversing valve 405 switches the connection state of the liquid supply pipe 403 and the left and right nozzles 404 according to the signals from the trigger components on both sides. That is, when the left saw blade 202 reaches the corresponding nozzle 404, the liquid supply pipe 403 is connected to the left nozzle 404, and when the right saw blade 202 reaches the corresponding nozzle 404, the liquid supply pipe 403 is connected to the right nozzle 404. This achieves precise and independent timed cooling on both sides, avoiding coolant waste caused by dry spraying from a single nozzle 404. When the sensing metal plate 407 is outside the detection range of the proximity switches 406 on both sides, the electromagnetic reversing valve 405 is in the neutral position, and the liquid supply pipe 403 is not connected to either nozzle 404. The cooled coolant falls into the liquid guide frame 5 and is discharged into the cooling tank 6 through the liquid guide pipe 501 for recycling. After being filtered by the filter frame 601 and cooled by the air by the cooling pipe 7, it can be recycled, effectively reducing coolant waste.

[0033] like Figure 1 and Figure 8 As shown, it also includes a filter frame 601, a locking rod 602, and limiting posts 603. The inner wall of the cooling box 6 has a through hole through which the liquid guide tube 501 of the liquid guide frame 5 passes. Two limiting posts 603 are symmetrically installed on the inner wall of the cooling box 6 around the through hole. The filter frame 601 is engaged between the two limiting posts 603. The liquid guide tube 501 of the liquid guide frame 5 extends into the filter frame 601. The edge of the filter frame 601 is detachably connected to the inner wall of the cooling box 6 via the locking rod 602. Because some metal fragments are generated during the cutting process and have a certain temperature, these... Metal debris will be discharged from the liquid guide pipe 501 along with the coolant. When passing through the filter frame 601, the metal debris will be filtered and collected by the filter frame 601, while the coolant will flow into the cooling tank 6. After the filter frame 601 is full of metal debris, pull the locking rod 602 away from the side wall of the cooling tank 6 and rotate the filter frame 601 so that the two ends of the filter frame 601 are no longer stuck to the limiting post 603. Then the filter frame 601 can be removed for cleaning and recycling of metal debris. The remaining metal debris in the frame can be cleaned by removing the liquid guide frame 5.

[0034] like Figure 1 and Figure 9As shown, it also includes cooling pipes 7 and a cooler 701. Cooling pipes 7 are evenly arranged inside the cooling box 6. The cooling pipes 7 are hollow and penetrate the two opposite side walls of the cooling box 6. A cooler 701 is installed on the outer wall of the cooling box 6. The air outlet of the cooler 701 is connected to the air inlet of the cooling pipes 7. The coolant flowing back into the cooling box 6 has a certain temperature. In order to ensure the cooling effect, the coolant needs to be cooled down. The cooler 701 is turned on to blow air onto the cooling pipes 7. The cold air exchanges heat with the coolant in the cooling box 6 through the outer wall of the cooling pipes 7 to cool down the coolant. The cooled coolant is pumped into the supply pipe 403 and the spray pipe 404 by the pump body 402 for recycling, reducing the consumption of coolant.

[0035] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An automatic positioning and cutting device for H-beams used in steel structure construction, comprising a roller conveyor (1) and a cutting table (2), wherein the cutting table (2) is provided on the front side of the roller conveyor (1), characterized in that, It also includes a moving plate (201), a saw blade (202), a rotary motor (203), a bracket (3), a hydraulic cylinder (301), and a pressure plate (302). A roller conveyor (1) is used to transport H-beams (100). A feeding mechanism is installed inside the cutting table (2). The cutting end of the feeding mechanism is connected to a saw blade (202). The saw blade (202) is driven to rotate by the rotary motor (203). A bracket (3) is installed on the left and right sides of the cutting table (2). A hydraulic cylinder (301) is installed on the bracket (3). The telescopic end of the hydraulic cylinder (301) faces downward and is connected to a pressure plate (302). Side pressure components are provided on the left and right sides of the cutting position of the H-beams (100). The side pressure components include a driving component and a pressing component. The pressing component clamps the H-beams (100) from the side under the action of the driving component.

2. The automatic positioning and cutting device for H-beams used in steel structure construction according to claim 1, characterized in that, The feeding mechanism is a linear electric guide rail (4), and a moving plate (201) is connected to the moving end of the linear electric guide rail (4). Saw blades (202) are installed on the left and right ends of the moving plate (201).

3. The automatic positioning and cutting device for H-beams used in steel structure construction according to claim 2, characterized in that, The cutting trajectories of the two saw blades (202) are located on the same plane and rotate symmetrically and alternately to perform cutting operations. The left saw blade (202) rotates clockwise and the right saw blade (202) rotates counterclockwise.

4. The automatic positioning and cutting device for H-beams used in steel structure construction according to claim 1, characterized in that, The driving component is an electric push rod (401), and the pressing component is a pressing wheel (400). Electric push rods (401) are installed on the upper left and right side walls of the cutting table (2). The telescopic end of the electric push rod (401) is connected to a pressing wheel (400) for laterally clamping the H-beam (100).

5. The automatic positioning and cutting device for H-beams used in steel structure construction according to claim 4, characterized in that, It also includes a pump body (402), a liquid supply pipe (403), a nozzle (404), a solenoid reversing valve (405), a liquid guide frame (5), a cooling tank (6), and a triggering assembly. A cooling tank (6) is provided on the right side of the cutting table (2). A pump body (402) is installed on the side wall of the cutting table (2). The liquid inlet of the pump body (402) is connected to the bottom of the cooling tank (6). The liquid outlet of the pump body (402) is connected to two nozzles (404) through the same liquid supply pipe (403). The liquid outlets of the two nozzles (404) pass through the side wall of the cutting table (2) and point to the cutting path of the saw blade (202) on the corresponding side. The liquid supply pipe (403) is connected to the right side of the cutting table (2). 3) The three-position three-way electromagnetic reversing valve (405) is connected to one of the two nozzles (404) respectively. The cutting table (2) is equipped with a triggering component. The electromagnetic reversing valve (405) is electrically connected to the triggering component and switches the conduction state between the left and right nozzles (404) and the liquid supply pipe (403) according to the detection signal of the triggering component. The bottom of the cutting table (2) is detachably equipped with a liquid guide frame (5). The right side of the liquid guide frame (5) is equipped with a liquid guide pipe (501). The bottom surface of the liquid guide frame (5) is higher on the left and lower on the right. The liquid guide pipe (501) of the liquid guide frame (5) passes through the cutting table (2) and is connected to the inside of the cooling box (6).

6. The automatic positioning and cutting device for H-beams used in steel structure construction according to claim 5, characterized in that, The triggering components include a proximity switch (406) and a sensing metal plate (407). The sensing metal plate (407) is installed on the moving plate (201). The proximity switch (406) is installed on both sides of the cutting table (2). The proximity switch (406) and the sensing metal plate (407) are arranged on the same straight line. When the sensing metal plate (407) moves with the moving plate (201) into the detection range of the left proximity switch (406), the proximity switch (406) outputs an electrical signal to the solenoid reversing valve (405) to control the solenoid reversing valve (405) to connect the liquid supply pipe (403) and the left nozzle (404), while cutting off the right nozzle (404). When the sensing metal plate (407) moves into the detection range of the right proximity switch (406), the solenoid reversing valve (405) switches to connect the liquid supply pipe (403) and the right nozzle (404).

7. The automatic positioning and cutting device for H-beams used in steel structure construction according to claim 5, characterized in that, It also includes a filter frame (601), a locking rod (602) and a limiting post (603). The inner wall of the cooling box (6) is provided with a through hole for the liquid guide tube (501) of the liquid guide frame (5) to pass through. Two limiting posts (603) are symmetrically installed on the inner wall of the cooling box (6) around the through hole. The filter frame (601) is snapped between the two limiting posts (603). The liquid guide tube (501) of the liquid guide frame (5) extends into the filter frame (601). The edge of the filter frame (601) is detachably connected to the inner wall of the cooling box (6) through the locking rod (602).

8. The automatic positioning and cutting device for H-beams used in steel structure construction according to claim 7, characterized in that, It also includes cooling pipes (7) and air coolers (701). Cooling pipes (7) are evenly arranged inside the cooling box (6). The cooling pipes (7) are hollow and penetrate the two opposite side walls of the cooling box (6). Air coolers (701) are installed on the outer wall of the cooling box (6). The air outlet of the air cooler (701) is connected to the air inlet of the cooling pipes (7).

9. The automatic positioning and cutting device for H-beams used in steel structure construction according to claim 4, characterized in that, The pressure rollers (400) at the telescopic end of the same electric push rod (401) are located on the front and rear sides of the saw blade (202) on the same side, and a stabilizing plate (408) is connected between the pressure rollers (400). A guide frame (409) is installed inside the cutting table (2), and the shaft bearing seat of the rotary motor (203) is slidably embedded in the groove of the guide frame (409).

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