Steel plate quantitative cutting device for urban infrastructure construction

Abstract

The invention belongs to the technical field of steel plate cutting, and discloses an urban infrastructure steel plate quantitative cutting device which comprises a bottom plate, supporting columns are fixedly connected to the four corners of the top of the bottom plate correspondingly, a sliding groove is formed in the top of the bottom plate, a workbench is fixedly connected to the tops of the supporting columns, and a steel plate is fixedly placed on the workbench; a cutting groove is formed in the workbench, a cutting knife is arranged at the bottom of the cutting groove, a mounting block is fixedly connected to the side face of the supporting block, a protection mechanism used for preventing cutting scraps from splashing is arranged on the mounting block, and through cooperation of a protection cover, a driving assembly and other structures, the cutting scrap scraps can be prevented from splashing conveniently; and meanwhile, cutting sparks are prevented from being directly exposed, eyes of workers are prevented from being damaged, and the problem that when an existing cutting device conducts cutting through a cutting knife, a large number of sparks and chippings are likely to be generated, and then certain potential safety hazards exist is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel plate cutting, in particular to a steel plate quantitative cutting device for urban infrastructure. Background Art

[0002] Urban infrastructure, that is, urban infrastructure construction, refers to the construction and improvement of material engineering facilities carried out in the process of urban development and construction. These facilities are the basis for supporting the normal operation of the city and the lives of residents, such as bridges, roads, tunnels, building construction, etc. In the process of road tunnel construction, steel plates are mostly needed as the base construction. Due to the different lengths of the construction, the steel plates need to be cut by cutting equipment to ensure the accuracy of the construction.

[0003] For example, the utility model with the publication number CN209550724U discloses a cutting device for processing stainless steel plates, including a workbench and a support rod located at the bottom of the workbench for supporting the whole, and a storage plate located below the workbench for placing sundries, as well as connecting plates fixedly installed on both sides of the upper end of the workbench for fixing and a rotating rod located between the two sets of connecting plates for driving the blade to rotate, the outer surface of the workbench is located below the blade and has an opening on the outer surface, the upper end of the workbench has a storage groove on the outer surface, and connecting rods are provided on both sides of the inner wall of the storage groove. The cutting device for processing stainless steel plates described in the utility model can limit the two sides of the plate to be cut, thereby effectively preventing the plate from sliding during cutting and causing uneven cutting, and the blade can also be shielded when the device is idle, thereby effectively preventing safety hazards and bringing better prospects for use.

[0004] During the cutting process, the above-mentioned device realizes rapid cutting of the steel plate through the high-speed rotating cutting knife. During the cutting process, due to the high-speed friction temperature of the cutting knife, a large number of electric sparks are easily generated, which can damage the workers' eyes. At the same time, it is also easy for the cut iron chips to splash all over the surface of the workbench, which is difficult to clean and affects the subsequent cutting. In addition, when using the blade for cutting, it is difficult to achieve precise quantitative cutting, which affects the size and quality after cutting.

[0005] Therefore, a quantitative cutting device for steel plates used in urban infrastructure is proposed to solve the problems raised by the background technology. Summary of the invention

[0006] In order to solve the problem mentioned in the above background technology that the existing cutting device is prone to generate a large amount of sparks and debris when cutting with a cutting knife, thereby posing certain safety hazards, the present invention provides a quantitative cutting device for steel plates for urban infrastructure.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a quantitative cutting device for steel plates for urban infrastructure, comprising a base plate, four corners of the top of the base plate are fixedly connected to support columns, the top of the base plate is provided with a slide groove, the top of the support column is fixedly connected to a workbench, a steel plate is fixedly placed on the workbench, a cutting groove is provided on the workbench, a quantitative ruler is fixedly connected to the top edge of the workbench, a cutting knife is arranged at the bottom of the cutting groove, both sides of the cutting knife are rotatably connected to connecting plates, a control motor for driving the cutting knife to rotate is fixedly connected to the connecting plate on one side, and a supporting block is fixedly connected to the bottom of the two connecting plates, the supporting block slides along the slide groove, an electric cylinder is fixedly connected to the inside of the slide groove, the electric cylinder is fixedly connected to the side of the supporting block, the side of the supporting block is fixedly connected to the mounting block, and a protective mechanism for preventing cutting debris from splashing is arranged on the mounting block;

[0008] The protection mechanism includes a protection cover, which is located directly above the cutting knife. A movable plate is fixedly connected to the side of the protection cover. A movable groove is opened on the surface of the workbench. The movable plate slides along the movable groove. The protection cover is funnel-shaped and the bottom is in contact with the steel plate.

[0009] Preferably, an insertion groove is provided on a side of the mounting block away from the supporting block, and a driving component for driving the adjustment of the distance between the protective cover and the workbench is provided on the mounting block.

[0010] Preferably, the driving assembly includes a gear, which is located at the inner center of the insertion slot, and the inner part of the insertion slot is fixedly connected with symmetrical horizontal plates on both sides, the two horizontal plates are located on symmetrical sides of the gear and are rotatably connected to the gear, a tooth plate is meshed at the tooth mouth of the gear, the tooth plate is fixedly connected to one side of the movable plate in the vertical direction, and a driving motor for driving the gear to rotate is fixedly connected to the horizontal plate.

[0011] Preferably, a limiting component for limiting the position of the gear is provided on the mounting block.

[0012] Preferably, the limiting assembly includes a plurality of teeth arranged longitudinally, the plurality of teeth are fixedly connected to the tooth plate, a cross bar is clamped on one side of the inclined surface of the teeth, the side of the cross bar close to the teeth is triangular, the end of the cross bar away from the teeth is fixedly connected to a spring telescopic rod, and the spring telescopic rod is fixedly connected to the side of the mounting block away from the support block.

[0013] Preferably, the workbench is fixedly connected to a connecting seat at the top of the cutting groove, and the bottom of the connecting seat is provided for extruding a balancing component.

[0014] Preferably, the balancing assembly includes an arc-shaped plate, the top of the arc-shaped plate is fixedly connected to a T-block, the bottom of the connecting seat is provided with a T-slot, the T-slot is slidably connected to the T-block, the bottom of the arc-shaped plate is fixedly connected to a spring, the bottom of the spring is fixedly connected to a limit plate, and the limit plate is fixedly connected to the top of the protective cover.

[0015] Preferably, a cleaning mechanism for adsorbing impurities inside the protective cover is provided on the top of the connecting seat.

[0016] Preferably, the cleaning mechanism includes a bellows, one end of the bellows passes through the protective cover and is fixedly connected to the side of the protective cover, the end of the bellows away from the protective cover is clamped with a collecting box, the top of the connecting seat is fixedly connected to a limiting box, the collecting box is placed inside the limiting box, and a dust suction fan is provided inside the collecting box on the symmetrical side of the bellows.

[0017] Preferably, a mounting ring is fixedly connected to one side of the bellows close to the collection box, a mounting groove is provided on the collection box, the mounting ring is slidably engaged in the mounting groove, slots are provided on the mounting ring and the top of the collection box, a fixed plug is slidably inserted into the inside of the slot, an insertion rod is fixedly connected to the bottom of the fixed plug, the insertion rod matches the size of the slot, and a closing cover is hinged at the top edge of the collection box.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention facilitates the prevention of splashing of cutting iron chips by setting up the cooperation of structures such as a protective cover and a driving component, and also avoids direct exposure of cutting sparks to damage workers' eyes. The protective cover is used to protect the cutting knife and the cutting part of the steel plate, so that the generated iron chips are located inside the protective cover, and the moving plate is driven to slide synchronously in the moving groove by the movement of the support block, so that the protective cover and the cutting knife move synchronously. In order to adapt to the cutting of steel plates of different widths, the driving component can be used to drive the moving plate to rise and fall, thereby achieving the adjustment of the distance between the protective cover and the workbench, which is convenient for adapting to the placement of steel plates of different sizes, and solves the problem that the existing cutting device is prone to generate a large number of sparks and debris when cutting with the cutting knife, and thus there are certain safety hazards.

[0020] The present invention facilitates the limiting of the gear rack by arranging the coordination of structures such as teeth, cross bars, and springs to prevent the gear rack from sliding down due to its own weight. When the gear and the tooth plate are used to adjust the height, in order to prevent the tooth plate from sliding down due to its own weight, it can be limited by cooperating with a limiting component. When the tooth plate moves upward, the cross bar squeezes the spring telescopic rod to move to one side of the mounting block. When it moves downward, the cross bar blocks the bottom of the teeth to prevent it from moving downward, thereby achieving the effect of limiting it and preventing the tooth plate from sliding down due to its own weight and affecting the use effect.

[0021] The present invention facilitates the rapid collection of iron filings in the protective cover by arranging the coordination of structures such as the bellows, the collection box, and the dust suction fan. When the iron filings enter the interior of the protective cover, the dust suction fan drives the bellows to quickly suck the iron filings in the protective cover into the collection box for collection. When use is completed, the fixed plug is taken out along the slot, which makes it convenient to remove the mounting ring from the mounting groove, thereby realizing the separation of the bellows and the collection box. After the separation is completed, the collection box is removed from the limit box, and the iron filings and impurities inside are uniformly dumped, which is convenient for subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection base and the collection box of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0027] Figure 6 It is a schematic diagram of the cooperation between the support block and the driving assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of the cooperation between the driving assembly and the limiting assembly of the present invention;

[0029] Figure 8 It is a schematic diagram of the cleaning mechanism of the present invention.

[0030] In the figure: 1, bottom plate; 11, support column; 12, slide; 2, workbench; 21, cutting groove; 22, quantitative ruler; 23, moving groove; 24, connecting seat; 241, limit box; 3, cutting knife; 31, connecting plate; 32, control motor; 33, support block; 331, mounting block; 4, protection mechanism; 41, protection cover; 42, moving plate; 43, driving assembly; 431, gear; 4311, cross plate; 432, tooth plate; 43 3. Driving motor; 44. Limiting assembly; 441. Teeth; 442. Cross bar; 443. Spring telescopic rod; 45. Balancing assembly; 451. Arc plate; 452. Spring; 453. Limiting plate; 5. Electric cylinder; 6. Cleaning mechanism; 61. Bellows; 611. Mounting ring; 6111. Slot; 62. Collecting box; 621. Mounting slot; 622. Closing cover; 63. Dust suction fan; 64. Fixed plug-in block; 641. Plug-in rod. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figures 1 to 8 As shown, the present invention provides a quantitative cutting device for steel plates for urban infrastructure, comprising a bottom plate 1, four corners of the top of the bottom plate 1 are fixedly connected with support columns 11, a slide groove 12 is provided on the top of the bottom plate 1, a workbench 2 is fixedly connected to the top of the support column 11, a steel plate is fixedly placed on the workbench 2, a cutting groove 21 is provided on the workbench 2, a quantitative ruler 22 is fixedly connected to the top edge of the workbench 2, a cutting knife 3 is arranged at the bottom of the cutting groove 21, both sides of the cutting knife 3 are rotatably connected with connecting plates 31, a control motor 32 for driving the cutting knife 3 to rotate is fixedly connected to one side of the connecting plate 31, and a support block 33 is fixedly connected to the bottom of the two connecting plates 31, the support block 33 slides along the slide groove 12, and the slide groove 12 An electric cylinder 5 is fixedly connected inside, and the electric cylinder 5 is fixedly connected to the side of the support block 33. A mounting block 331 is fixedly connected to the side of the support block 33, and a protective mechanism 4 for preventing cutting debris from splashing is provided on the mounting block 331; the protective mechanism 4 includes a protective cover 41, and the protective cover 41 is located directly above the cutting knife 3. A movable plate 42 is fixedly connected to the side of the protective cover 41, and a movable groove 23 is provided on the surface of the workbench 2. The movable plate 42 slides along the movable groove 23. The protective cover 41 is funnel-shaped and the bottom is in contact with the steel plate. An insertion groove is provided on the side of the mounting block 331 away from the support block 33, and a driving component 43 for driving the adjustment of the distance between the protective cover 41 and the workbench 2 is provided on the mounting block 331.

[0033] The above scheme is adopted: by placing the steel plate to be cut on the surface of the workbench 2, measuring the length and width to be cut according to the quantitative ruler 22, manually moving the steel plate to make it close to one side of the cutting groove 21 and fixing it, and after fixing, starting the control motor 32 to drive the cutting knife 3 to rotate at high speed, and cooperating with the electric cylinder 5 to drive the entire support block 33 to slide inside the slide groove 12 close to one side of the steel plate, thereby driving the cutting knife 3 to quickly cut the steel plate. In order to avoid the splashing of cutting debris during the cutting process, the protection mechanism 4 can be used to protect it, and the protective cover 41 can be used to protect the cutting knife 3 and the cutting part of the steel plate, so that the generated iron filings are located inside the protective cover 41, and the moving plate 42 is driven to slide synchronously in the moving groove 23 through the movement of the support block 33, so that the protective cover 41 and the cutting knife 3 move synchronously. In order to adapt to the cutting of steel plates of different widths, the driving component 43 can be used to drive the moving plate 42 to rise and fall, thereby adjusting the distance between the protective cover 41 and the workbench 2, so as to adapt to the placement of steel plates of different sizes.

[0034] like Figure 6 As shown, the driving assembly 43 includes a gear 431, which is located at the inner center of the insertion groove, and the interior of the insertion groove is fixedly connected with a horizontal plate 4311 symmetrically on both sides, the two horizontal plates 4311 are located on the symmetrical sides of the gear 431 and are rotatably connected to the gear 431, a tooth plate 432 is meshed at the tooth mouth of the gear 431, the tooth plate 432 is fixedly connected to one side of the moving plate 42 in the vertical direction, and a driving motor 433 for driving the gear 431 to rotate is fixedly connected to the horizontal plate 4311, and a limiting assembly 44 for limiting the gear 431 is provided on the mounting block 331, and the limiting assembly 44 includes a plurality of teeth 441 arranged longitudinally, and the plurality of teeth 441 are fixedly connected to the tooth plate 432, and a cross bar 4 is clamped on one side of the inclined surface of the tooth 441 42, the side of the cross bar 442 close to the tooth 441 is triangular, and the end of the cross bar 442 away from the tooth 441 is fixedly connected with a spring telescopic rod 443, and the spring telescopic rod 443 is fixedly connected to the side of the mounting block 331 away from the support block 33, and the workbench 2 is located at the top of the cutting groove 21 and is fixedly connected with a connecting seat 24, and the bottom of the connecting seat 24 is arranged for extruding a balancing component 45, and the balancing component 45 includes an arc plate 451, and the top of the arc plate 451 is fixedly connected with a T-block, and the bottom of the connecting seat 24 is provided with a T-slot, and the T-slot is slidably connected to the T-block, and the bottom of the arc plate 451 is fixedly connected with a spring 452, and the bottom of the spring 452 is fixedly connected with a limiting plate 453, and the limiting plate 453 is fixedly connected to the top of the protective cover 41.

[0035] The above scheme is adopted: by using the driving motor 433 to drive the gear 431 to rotate, the meshing tooth plate 432 of the inertia is lifted and lowered, thereby driving the movable plate 42 to rise and fall in the movable groove 23, so as to achieve the effect of adjusting the distance between the protective cover 41 and the workbench 2, and using the gear 431 and the tooth plate 432 to adjust the height, in order to prevent the tooth plate 432 from falling due to its own gravity, it can be limited by cooperating with the limit assembly 44, when the tooth plate 432 moves upward, the cross bar 442 squeezes the spring telescopic rod 443 to move to one side of the mounting block 331, and when it moves downward, the cross bar 442 blocks the bottom of the tooth 441 to prevent it from moving downward, thereby achieving the effect of limiting it, preventing the tooth plate 432 from sliding down due to its own gravity and affecting the use effect. During the adjustment process, the top arc plate 451 and the limiting plate 453 are pressed against the T-slot and the protective cover 41 under the compression of the spring 452, so that it maintains a balanced state, and avoids the side away from the movable plate 42 from tilting during use.

[0036] like Figure 8 As shown, a cleaning mechanism 6 for adsorbing impurities inside the protective cover 41 is arranged on the top of the connecting seat 24, and the cleaning mechanism 6 includes a bellows 61, one end of the bellows 61 passes through the protective cover 41 and is fixedly connected to the side of the protective cover 41, and the end of the bellows 61 away from the protective cover 41 is clamped with a collecting box 62, and the top of the connecting seat 24 is fixedly connected to the limit box 241, and the collecting box 62 is placed inside the limit box 241, and the inside of the collecting box 62 is located on the symmetrical side of the bellows 61. 3. A mounting ring 611 is fixedly connected to one side of the bellows 61 close to the collecting box 62. A mounting groove 621 is provided on the collecting box 62. The mounting ring 611 is slidably engaged in the mounting groove 621. A slot 6111 is provided on the top of the mounting ring 611 and the collecting box 62. A fixed plug block 64 is slidably inserted into the slot 6111. An insert rod 641 is fixedly connected to the bottom of the fixed plug block 64. The size of the insert rod 641 matches that of the slot 6111. A closing cover 622 is hinged at the top edge of the collecting box 62.

[0037] The above scheme is adopted: the cleaning mechanism 6 is used to quickly collect the generated iron filings. When the iron filings enter the inside of the protective cover 41, the dust suction fan 63 is used to drive the bellows 61 to quickly suck the iron filings in the protective cover 41 into the collection box 62 for collection. When use is completed, the fixed plug 64 is taken out along the slot 6111, and then the mounting ring 611 is removed from the mounting groove 621 to separate the bellows 61 from the collection box 62. After the separation is completed, the collection box 62 is removed from the limit box 241, and the iron filings and impurities inside are uniformly dumped for subsequent use.

[0038] The working principle and use process of the present invention are as follows: when using the device, the steel plate to be cut is placed on the surface of the workbench 2, the length and width to be cut are measured according to the quantitative ruler 22, the steel plate is manually moved to make it close to one side of the cutting groove 21 and fixed, and after fixing, the cutting knife 3 is driven to rotate at high speed by starting the control motor 32, and the electric cylinder 5 is cooperated to drive the entire support block 33 to slide inside the slide groove 12 close to one side of the steel plate, thereby driving the cutting knife 3 to quickly cut the steel plate, and during the cutting process, the protective cover 41 is used to protect the cutting knife 3 and the cutting part of the steel plate, so that the generated iron filings are located inside the protective cover 41, and the dust suction fan 63 is used to drive the bellows 61 to quickly suck the iron filings in the protective cover 41 into the collection box 62 for collection, and the driving assembly 43 is used to drive the moving plate 42 to rise and fall, thereby achieving the adjustment of the distance between the protective cover 41 and the workbench 2, so as to accommodate the placement of steel plates of different sizes.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quantitative cutting device for steel plates for urban infrastructure, comprising a bottom plate (1), characterized in that: The four corners of the top of the bottom plate (1) are fixedly connected to support columns (11), the top of the bottom plate (1) is provided with a slide groove (12), the top of the support column (11) is fixedly connected to a workbench (2), a steel plate is fixedly placed on the workbench (2), a cutting groove (21) is provided on the workbench (2), a quantitative ruler (22) is fixedly connected to the top edge of the workbench (2), a cutting knife (3) is provided at the bottom of the cutting groove (21), both sides of the cutting knife (3) are rotatably connected to connecting plates (31), and one side of the connecting plate (31) is connected to the cutting knife (3). A control motor (32) for driving the cutting blade (3) to rotate is fixedly connected to the plate (31), and a support block (33) is fixedly connected to the bottom of the two connecting plates (31). The support block (33) slides along the slide groove (12). An electric cylinder (5) is fixedly connected inside the slide groove (12). The electric cylinder (5) is fixedly connected to the side of the support block (33). A mounting block (331) is fixedly connected to the side of the support block (33). A protective mechanism (4) for preventing cutting debris from splashing is provided on the mounting block (331); The protection mechanism (4) comprises a protection cover (41), wherein the protection cover (41) is located directly above the cutting knife (3), a movable plate (42) is fixedly connected to the side of the protection cover (41), a movable groove (23) is provided on the surface of the workbench (2), the movable plate (42) slides along the movable groove (23), and the protection cover (41) is funnel-shaped and its bottom is in contact with the steel plate.

2. The device for quantitatively cutting steel plates for urban infrastructure according to claim 1 is characterized in that: A placement groove is provided on a side of the mounting block (331) away from the support block (33), and a driving component (43) for driving the distance adjustment between the protective cover (41) and the workbench (2) is provided on the mounting block (331).

3. The quantitative cutting device for steel plates for urban infrastructure according to claim 1 is characterized in that: The driving assembly (43) comprises a gear (431), wherein the gear (431) is located at the inner center of the insertion groove, and the interior of the insertion groove is fixedly connected with symmetrical transverse plates (4311) on both sides, and the two transverse plates (4311) are located on symmetrical sides of the gear (431) and are rotatably connected to the gear (431), and a tooth plate (432) is meshed at the tooth opening of the gear (431), and the tooth plate (432) is fixedly connected to one side of the moving plate (42) in the vertical direction, and a driving motor (433) for driving the gear (431) to rotate is fixedly connected to the transverse plate (4311).

4. The device for quantitatively cutting steel plates for urban infrastructure according to claim 3 is characterized in that: The mounting block (331) is provided with a limiting assembly (44) for limiting the position of the gear (431).

5. The device for quantitatively cutting steel plates for urban infrastructure according to claim 4 is characterized in that: The limiting assembly (44) comprises a plurality of teeth (441) arranged longitudinally, the plurality of teeth (441) being fixedly connected to the tooth plate (432), a cross bar (442) being clamped on one side of the inclined surface of the teeth (441), the side of the cross bar (442) close to the teeth (441) being triangular in shape, and one end of the cross bar (442) away from the teeth (441) being fixedly connected to a spring telescopic rod (443), and the spring telescopic rod (443) being fixedly connected to a side of the mounting block (331) away from the support block (33).

6. The device for quantitatively cutting steel plates for urban infrastructure according to claim 1, characterized in that: The workbench (2) is fixedly connected to a connecting seat (24) at the top of the cutting groove (21), and the bottom of the connecting seat (24) is provided with an extrusion balancing component (45).

7. The device for quantitatively cutting steel plates for urban infrastructure according to claim 6 is characterized in that: The balancing assembly (45) comprises an arc-shaped plate (451), the top of the arc-shaped plate (451) is fixedly connected to a T-shaped block, the bottom of the connecting seat (24) is provided with a T-shaped slot, the T-shaped slot is slidably connected to the T-shaped block, the bottom of the arc-shaped plate (451) is fixedly connected to a spring (452), the bottom of the spring (452) is fixedly connected to a limiting plate (453), and the limiting plate (453) is fixedly connected to the top of the protective cover (41).

8. The device for quantitatively cutting steel plates for urban infrastructure according to claim 6, characterized in that: A cleaning mechanism (6) for adsorbing impurities inside the protective cover (41) is provided on the top of the connecting seat (24).

9. The device for quantitatively cutting steel plates for urban infrastructure construction according to claim 8, characterized in that: The cleaning mechanism (6) comprises a bellows (61), one end of the bellows (61) passes through the protective cover (41) and is fixedly connected to the side of the protective cover (41), the end of the bellows (61) away from the protective cover (41) is clamped with a collection box (62), the top of the connecting seat (24) is fixedly connected to a limit box (241), the collection box (62) is placed inside the limit box (241), and a dust suction fan (63) is arranged inside the collection box (62) on one side symmetrical to the bellows (61).

10. The quantitative cutting device for steel plates for urban infrastructure according to claim 9, characterized in that: A mounting ring (611) is fixedly connected to one side of the bellows (61) close to the collection box (62); a mounting groove (621) is provided on the collection box (62); the mounting ring (611) is slidably engaged in the mounting groove (621); a slot (6111) is provided on the top of the mounting ring (6111) and the collection box (62); a fixed plug block (64) is slidably inserted into the inside of the slot (6111); an insertion rod (641) is fixedly connected to the bottom of the fixed plug block (64); the size of the insertion rod (641) matches that of the slot (6111); and a closing cover (622) is hingedly connected to the top edge of the collection box (62).

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