A gantry shearing device for scrap iron recycling

Abstract

This invention relates to a gantry shearing device for scrap steel recycling, belonging to the technical field of gantry shearing devices. It includes two support columns, with a fixed beam fixedly installed at the top of both columns. A conveying trough is fixedly installed at the rear of both support columns, and a pushing component is provided on the rear side of the inner wall of the conveying trough. Two sets of hydraulic cylinders are fixedly installed at the top of the fixed beam. The output end of the front set of hydraulic cylinders is equipped with a cutting blade, while the output end of the rear set of hydraulic cylinders is fixedly equipped with a pressing plate. The cutting blade includes a connecting horizontal plate and a cutting blade body disposed at the bottom of the connecting horizontal plate. This invention ensures that the material is reliably compressed before shearing by real-time detection of the material thickness during the conveying process, fundamentally avoiding material slippage, edge curling, and displacement during shearing, significantly reducing the risk of blade jamming, improving equipment operational stability, and achieving adaptive adjustment of the blade gap according to the material thickness.

Description

Technical Field

[0001] This invention relates to the field of gantry shearing devices, specifically a gantry shearing device for recycling scrap steel. Background Technology

[0002] A gantry shear, also known as a gantry cutter, is a heavy-duty hydraulic processing device specifically designed for the recycling and processing of scrap steel. It is primarily used for cold shearing and crushing various scrap metal materials, processing them into qualified furnace feed that meets smelting requirements. This equipment is applicable to a wide range of materials, including thin steel, reinforcing bars, steel plates, round steel, steel pipes, scrap copper, scrap aluminum, scrapped car bodies, metal briquettes, ferroalloy furnace feed, and various ferrous and non-ferrous metal structural components. With the accelerated pace of transformation and upgrading in my country's manufacturing industry, gantry shears have evolved from traditional simple hydraulic equipment into an important component of the intelligent manufacturing equipment industry. This is because existing gantry shears utilize an integrated hydraulic-electric control system, supporting multiple control modes such as manual, automatic, and remote control.

[0003] In traditional gantry shearing devices, after the material is conveyed to the shearing station, the pressing mechanism's response is delayed or the pressing pressure cannot be matched with the material specifications. This easily leads to the material not being reliably compacted before shearing, resulting in material slippage, edge curling, and displacement during shearing. In severe cases, it can cause blade jamming and incomplete shearing, affecting the normal operation of the equipment. Furthermore, the gap between the upper and lower blades of traditional devices is fixed and cannot be adaptively adjusted according to the thickness of the material to be sheared. When the gap is too large, incomplete shearing and a rough material cross-section are likely to occur. When the gap is too small, blade wear is accelerated, the blade life is shortened, and the equipment maintenance cost is increased.

[0004] To address the aforementioned issues, we propose a gantry shearing device for scrap steel recycling. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a gantry shearing device for scrap steel recycling. By real-time monitoring of material thickness during the conveying process, it ensures that the material is reliably compressed before shearing, fundamentally preventing material slippage, edge curling, and displacement during shearing. This significantly reduces the risk of blade jamming, improves equipment operational stability, and enables adaptive adjustment of the blade gap according to material thickness, ensuring smooth and reliable shearing. Addressing the drawback of fixed blade gaps in traditional equipment, this application can adjust the gap between the upper and lower blades in real time according to material thickness: automatically reducing the gap for thick materials to ensure sufficient shearing and prevent material breakage, significantly improving shearing quality and throughput.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gantry shearing device for scrap steel recycling, comprising two support columns, a fixed beam fixedly installed on the top of the two support columns, a conveying trough plate fixedly installed on the rear of the two support columns, and a pushing component provided on the rear side of the inner wall of the conveying trough plate. Two sets of hydraulic cylinders are fixedly installed on the top of the fixed beam. The output end of the front set of hydraulic cylinders is provided with a cutting blade plate, and the output end of the rear set of hydraulic cylinders is fixedly installed with a pressing plate. The cutting blade plate includes a connecting horizontal plate and a cutting blade body disposed at the bottom of the connecting horizontal plate. A plurality of telescopic cavities are opened on the upper side of the inner side of the cutting blade body, and a connecting rod is slidably installed on the inner wall of each of the plurality of telescopic cavities.

[0007] Both of the two support columns have movable cavities on the side connecting the horizontal plate and the cutting blade, and both the front and rear sides of the conveying trough plate are provided with transmission cavities near the fixed beam. The inner walls of the two transmission cavities are provided with transmission components, and the inner walls of the movable cavities are provided with movable components.

[0008] Furthermore, the pushing component includes a pushing block that is slidably installed on the rear side of the inner wall of the conveying trough plate. A hydraulic conveying cylinder is provided on the rear side of the conveying trough plate, the output end of which is fixedly connected to the surface of the pushing block, and a support leg is fixedly installed on the bottom of the cylinder away from the conveying trough plate.

[0009] The push block includes a vertical push plate. The top of the vertical push plate has an integrally formed arc-shaped protrusion for assisting in pushing the material. A combination plate is fixedly installed on the side surface of the vertical push plate away from the fixed beam. The combination plate extends along the material conveying direction, and its length is configured to extend to the outside of the support column at the end of the pushing stroke, thereby ensuring that the push block will not jam with the actuating plate even when the material is completely pushed out.

[0010] Furthermore, a sloping material discharge plate is fixedly installed below the opposite inner sides of the two support columns. The upper surface of the sloping material discharge plate is on the same horizontal plane as the bottom surface of the inner wall of the conveying trough plate. The sloping material discharge plate has a downward inclined surface, and the inclined surface extends horizontally outward from the side away from the support column to form a material discharge section.

[0011] Furthermore, each set of hydraulic cylinders consists of two cylinders, with the output ends of both sets of hydraulic cylinders penetrating downwards through the fixed beam and extending below it. The output end of the first set of hydraulic cylinders is fixedly connected to the top of the connecting cross plate.

[0012] Each of the connecting rods has an enlarged end, which is slidably fitted into a telescopic cavity corresponding to the cutting blade body. The upper end of the connecting rod passes through the top of the cutting blade body and extends upward, and is fixedly connected to the bottom of the connecting horizontal plate. A shock-absorbing spring is sleeved on the rod wall of the connecting rods located between the connecting horizontal plate and the cutting blade body.

[0013] Furthermore, the transmission assembly includes a connecting longitudinal rod rotatably mounted on the inner wall of the transmission cavity, with the ends of the connecting longitudinal rod extending through the transmission cavity into the interior of the conveying trough plate. A toggle plate is fixedly mounted on the connecting longitudinal rod wall inside the conveying trough plate. The transmission cavity and the moving cavity share a common communicating oblique opening. A first crank is provided on one side of the connecting longitudinal rod wall located at the communicating oblique opening, and an oblique push rod is rotatably mounted inside the first crank. A second crank is provided on the rear side of the connecting longitudinal rod wall located behind the first crank, and an adjusting rod is rotatably mounted on the inner wall of the second crank.

[0014] A push cylinder is rotatably mounted on the end of the adjusting rod away from the second crank. Positioning blocks are slidably mounted on the upper and lower surfaces of the push cylinder. A spiral groove is formed on the inner wall of the push cylinder, and a starting rod is coaxially sleeved inside it. A pilot-operated pressure reducing valve is provided at one end of the starting rod and is drivenly connected to the adjusting end of the pilot-operated pressure reducing valve. An arc-head extrusion rod is fixedly mounted on the rod wall of the starting rod. The end of the arc-head extrusion rod is slidably embedded in the spiral groove. When the push cylinder moves axially, the spiral groove drives the starting rod to rotate around its axis in both directions through the arc-head extrusion rod.

[0015] Furthermore, the bottom of the actuating plate has an arc-shaped transition surface near the side away from the fixed beam, and one end of the inclined push rod passes through the connecting inclined opening and extends into the interior of the moving cavity. The width of the connecting inclined opening is greater than the outer diameter of the inclined push rod, and an active gap is formed between the two.

[0016] Furthermore, a limiting plate is fixedly mounted on the section of the connecting longitudinal rod near its end, and a spiral spring is fixedly installed on the limiting plate. The spiral spring is arranged around the outside of the connecting longitudinal rod, with its inner end fixedly connected to the limiting plate and its outer end fixedly connected to the inner wall of the transmission cavity.

[0017] Furthermore, the first crank and the second crank are integral with the connecting longitudinal rod, and the first crank and the second crank are disconnected and connected by a revolute joint to form a complete crank transmission structure. The opposite sides of the two positioning blocks are fixedly connected to the upper and lower inner walls of the transmission cavity, respectively. One end of the pilot pressure reducing valve is fixedly connected to the inner wall of the transmission cavity. When the first crank rotates clockwise, it drives the push cylinder to move closer to the pilot pressure reducing valve. At the same time, the second crank, which rotates with the first crank, also rotates clockwise and drives the inclined push rod to move into the interior of the moving cavity.

[0018] Furthermore, the moving component includes a push plate slidably mounted on one side of the inner wall of the moving cavity, and a pressing oblique block is slidably mounted on the side of the push plate near the connecting horizontal plate. The moving cavity has a sliding opening on the side near the cutting blade body. A first connecting block is fixedly mounted on the end of the cutting blade body near the moving cavity, and a second connecting block is fixedly mounted on the side of the connecting horizontal plate near the moving cavity.

[0019] Furthermore, the surface of the push plate is rotatably connected to one end of the inclined push rod. The first connecting block and the second connecting block extend into the interior of the moving cavity through corresponding sliding openings, and their outer walls are tightly slidably engaged with the inner wall of the sliding opening. The extrusion inclined block is disposed between the first connecting block and the second connecting block. The bottom of the second connecting block is provided with an inclined surface, which is adapted to the corresponding inclined surface of the extrusion inclined block. The initial position of the extrusion inclined block is spaced apart from the first connecting block.

[0020] Rubber plates are fixedly provided on the opposing surfaces of the extrusion block and the first connecting block to increase the frictional resistance when the two are in contact.

[0021] The sliding fit between the connecting horizontal plate and the extrusion inclined block, and the sliding fit between the pushing cylinder and the positioning block are both guide structures in which the trapezoidal groove and the trapezoidal block cooperate. In the cooperation structure between the connecting horizontal plate and the extrusion inclined block, a damping spring is also provided below the trapezoidal block at the bottom of the extrusion inclined block. The damping spring is used to elastically support the extrusion inclined block at the initial position in the middle of its stroke.

[0022] Compared with the prior art, the present invention provides a gantry shearing device for scrap steel recycling, which has the following advantages:

[0023] 1. This device ensures that the material is reliably compressed before shearing by real-time detection of the material thickness during the conveying process, fundamentally avoiding material slippage, warping, and displacement during shearing, greatly reducing the risk of blade jamming and improving the stability of equipment operation.

[0024] 2. This device enables adaptive adjustment of the blade gap according to the material thickness, ensuring smooth and reliable shearing. Addressing the shortcomings of traditional equipment with fixed blade gaps, this device can adjust the gap between the upper and lower blades in real time according to the material thickness. When shearing thick materials, the gap is automatically reduced to ensure sufficient shearing and prevent material breakage, significantly improving shearing quality and throughput. When shearing thin materials, the blade gap is automatically increased, ensuring the shearing effect is met while avoiding blade wear due to insufficient gap, thus effectively slowing down blade wear.

[0025] 3. This device can reduce ineffective wear, extend the service life of the blade, reduce operating costs, extend the blade replacement cycle, and reduce equipment maintenance costs and downtime. Attached Figure Description

[0026] Figure 1 This is a front perspective view of the entire invention;

[0027] Figure 2 This is a rear perspective view of the entire invention;

[0028] Figure 3 This is a vertical sectional perspective view of the conveyor trough plate of the present invention;

[0029] Figure 4 for Figure 3 Enlarged structural diagram of section A in the middle;

[0030] Figure 5 for Figure 3 Enlarged structural diagram of section B;

[0031] Figure 6 A perspective view of the push component of this invention;

[0032] Figure 7 This is a cross-sectional perspective view of the conveyor trough plate portion of the present invention;

[0033] Figure 8 This is a three-dimensional view of the cross-section of the inclined push rod of the present invention;

[0034] Figure 9 This is a perspective view of the second crank of the present invention;

[0035] Figure 10 for Figure 9 A schematic diagram of the enlarged structure of C shown;

[0036] Figure 11 This is a vertical sectional perspective view of the cutting blade portion of the present invention;

[0037] Figure 12 for Figure 11 Enlarged structural diagram of section D in the middle;

[0038] Figure 13 for Figure 11Enlarged structural diagram of section E in the middle.

[0039] In the diagram: 1. Support column; 101. Inclined feed plate; 2. Fixed beam; 3. Conveying trough plate; 4. Pushing assembly; 401. Pushing block; 4011. Vertical push plate; 4012. Combination plate; 402. Hydraulic conveying cylinder; 403. Support leg; 5. Hydraulic cylinder; 6. Cutting blade; 7. Extrusion plate; 8. Connecting horizontal plate; 9. Cutting blade body; 901. Shock-absorbing spring; 10. Telescopic cavity; 11. Connecting rod; 12. Moving cavity; 13. Transmission cavity;

[0040] 14. Transmission assembly; 1401. Connecting longitudinal rod; 14011. Limiting plate; 14012. Spiral spring; 1402. Actuating plate; 1403. Connecting oblique opening; 1404. First crank; 1405. Angled push rod; 1406. Second crank; 1407. Adjusting rod; 1408. Push cylinder; 1409. Positioning block; 1410. Spiral groove; 1411. Starting rod; 1412. Pilot-operated pressure reducing valve; 1413. Arc-head extrusion rod;

[0041] 15. Moving component; 1501. Push plate; 1502. Extrusion slant block; 1503. Slide opening; 1504. First connecting block; 1505. Second connecting block; 1506. Rubber plate. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1 to 13 In this embodiment, a gantry shearing device for scrap steel recycling includes two support columns 1. A fixed beam 2 is fixedly installed on the top of the two support columns 1. A conveying trough plate 3 is fixedly installed on the rear side of the two support columns 1. A pushing component 4 is provided on the rear side of the inner wall of the conveying trough plate 3.

[0044] Two sets of hydraulic cylinders 5 are fixedly installed on the top of the fixed beam 2. The output end of the front set of hydraulic cylinders 5 is provided with a cutting blade 6, and the output end of the rear set of hydraulic cylinders 5 is fixedly installed with a pressing plate 7. The cutting blade 6 includes a connecting horizontal plate 8 and a cutting blade body 9 set at the bottom of the connecting horizontal plate 8. Several telescopic cavities 10 are opened on the upper side inside the cutting blade body 9. Connecting rods 11 are slidably installed on the inner walls of the several telescopic cavities 10. The two support columns 1 are located on one side of the connecting horizontal plate 8 and the cutting blade body 9 and both have moving cavities 12. The front and rear sides of the conveying trough plate 3 are both opened with transmission cavities 13 near the fixed beam 2. The inner walls of the two transmission cavities 13 are jointly provided with a transmission component 14, and the inner walls of the moving cavities 12 are provided with a moving component 15.

[0045] The pushing component 4 includes a pushing block 401 that is slidably installed on the rear side of the inner wall of the conveying trough plate 3. A hydraulic conveying cylinder 402 is provided on the rear side of the conveying trough plate 3. The output end of the hydraulic conveying cylinder 402 is fixedly connected to the surface of the pushing block 401. A support leg 403 is fixedly installed on the bottom side of the hydraulic conveying cylinder 402 away from the conveying trough plate 3. The pushing block 401 includes a vertical pushing plate 4011. The top of the vertical pushing plate 4011 is integrally formed with an arc-shaped protrusion for assisting in pushing the material. A combination plate 4012 is fixedly installed on the surface of the vertical pushing plate 4011 away from the fixed beam 2. The combination plate 4012 extends along the material conveying direction. Its length is configured to extend to the outside of the support column 1 at the end of the pushing stroke, ensuring that the pushing block 401 pushes the material out completely without jamming with the actuating plate 1402.

[0046] Two support columns 1 are fixedly installed on the lower inner side of each other with inclined material plates 101. The upper surface of the inclined material plates 101 is on the same horizontal plane as the bottom surface of the inner wall of the conveying trough plate 3. The inclined material plates 101 have a downward inclined surface, and the inclined surface extends outward horizontally to form a material discharge part on the side away from the support columns 1.

[0047] Each set of hydraulic cylinders 5 consists of two cylinders. The output ends of both sets of hydraulic cylinders 5 pass downward through the fixed beam 2 and extend below it. The output end of the front set of hydraulic cylinders 5 is fixedly connected to the top of the connecting horizontal plate 8. Several connecting rods 11 are provided with enlarged ends. The enlarged ends slide in the corresponding telescopic cavity 10 on the cutting blade body 9. The upper end of the connecting rod 11 passes through the top of the cutting blade body 9 and extends upward, and is fixedly connected to the bottom of the connecting horizontal plate 8. Several connecting rods 11 are provided with shock-absorbing springs 901 on the rod wall located between the connecting horizontal plate 8 and the cutting blade body 9.

[0048] The transmission assembly 14 includes a connecting longitudinal rod 1401 that is rotatably mounted on the inner wall of the transmission cavity 13. The ends of the connecting longitudinal rod 1401 extend through the transmission cavity 13 and into the interior of the conveying trough plate 3. A toggle plate 1402 is fixedly mounted on the rod wall of the connecting longitudinal rod 1401 inside the conveying trough plate 3. The transmission cavity 13 and the moving cavity 12 are both provided with a connecting inclined opening 1403. A first crank 1404 is provided on one side of the connecting longitudinal rod 1401 on the side of the connecting inclined opening 1403. A slanted push rod 1405 is rotatably mounted inside the first crank 1404. A second crank 1406 is provided on the rear side of the connecting longitudinal rod 1401 behind the first crank 1404. An adjusting rod 1407 is rotatably mounted on the inner wall of the second crank 1406.

[0049] A push cylinder 1408 is rotatably mounted on the end of the adjusting rod 1407 away from the second crank 1406. The upper and lower surfaces of the push cylinder 1408 slide in combination with the positioning block 1409. A spiral groove 1410 is opened on the inner wall of the push cylinder 1408. A starting rod 1411 is coaxially sleeved inside the push cylinder 1408. One end of the starting rod 1411 is driven to be connected to the adjusting end of the pilot pressure reducing valve 1412. An arc-head extrusion rod 1413 is fixedly installed on the rod wall of the starting rod 1411. The end of the arc-head extrusion rod 1413 is slidably embedded in the spiral groove 1410. When the push cylinder 1408 moves axially, the spiral groove 1410 drives the starting rod 1411 to rotate around its axis in both directions through the arc-head extrusion rod 1413, thereby adjusting the output pressure of the pilot pressure reducing valve 1412.

[0050] The bottom of the actuating plate 1402 has an arc-shaped transition surface near the side away from the fixed beam 2. One end of the inclined push rod 1405 passes through the connecting inclined opening 1403 and extends into the moving cavity 12. The width of the connecting inclined opening 1403 is greater than the outer diameter of the inclined push rod 1405, and an active gap is formed between the two.

[0051] A limiting plate 14011 is fixedly mounted on the rod segment near the end of the connecting longitudinal rod 1401. A spiral spring 14012 is fixedly installed on the limiting plate 14011. The spiral spring 14012 is arranged around the outside of the connecting longitudinal rod 1401. Its inner end is fixedly connected to the limiting plate 14011, and its outer end is fixedly connected to the inner wall of the transmission cavity 13, so as to realize the automatic reset of the connecting longitudinal rod 1401.

[0052] The first crank 1404 and the second crank 1406 are integral with the connecting longitudinal rod 1401. The first crank 1404 and the second crank 1406 are disconnected and connected by a rotating joint to form a complete crank transmission structure. The two positioning blocks 1409 are fixedly connected to the upper and lower inner walls of the transmission cavity 13 on opposite sides. One end of the pilot pressure reducing valve 1412 is fixedly connected to the inner wall of the transmission cavity 13. When the first crank 1404 rotates clockwise, it drives the push cylinder 1408 to move closer to the pilot pressure reducing valve 1412. At the same time, the second crank 1406, which rotates with the first crank 1404, also rotates clockwise and drives the inclined push rod 1405 to move into the moving cavity 12.

[0053] The moving assembly 15 includes a push plate 1501 slidably mounted on one side of the inner wall of the moving cavity 12. A pressing inclined block 1502 is slidably mounted on the surface of the push plate 1501 near the side of the connecting horizontal plate 8. A sliding opening 1503 is provided on the side of the moving cavity 12 near the cutting blade 9. A first connecting block 1504 is fixedly mounted on the surface of the cutting blade 9 near one end of the moving cavity 12. A second connecting block 1505 is fixedly mounted on the side of the connecting horizontal plate 8 near the moving cavity 12.

[0054] The surface of the push plate 1501 is rotatably connected to one end of the inclined push rod 1405. The first connecting block 1504 and the second connecting block 1505 extend into the moving cavity 12 through the corresponding sliding opening 1503, and their outer walls are tightly slidably engaged with the inner wall of the sliding opening 1503. The pressing inclined block 1502 is disposed between the first connecting block 1504 and the second connecting block 1505. The bottom of the second connecting block 1505 is provided with an inclined surface, which is adapted to the corresponding inclined surface of the pressing inclined block 1502. The initial position of the pressing inclined block 1502 is spaced apart from the first connecting block 1504. Rubber plates 1506 are fixedly provided on the opposing surfaces of the pressing inclined block 1502 and the first connecting block 1504 to increase the frictional resistance during contact.

[0055] The connection between the horizontal plate 8 and the extrusion inclined block 1502, and the connection between the push cylinder 1408 and the positioning block 1409, both adopt a guide structure in which a trapezoidal groove and a trapezoidal block cooperate. In the cooperation structure between the horizontal plate 8 and the extrusion inclined block 1502, a damping spring is also provided below the trapezoidal block at the bottom of the extrusion inclined block 1502. The damping spring elastically supports the extrusion inclined block 1502 at its initial position in the middle of its stroke.

[0056] The working principle of this embodiment is as follows:

[0057] When the device is in use, scrap steel material is placed on the conveying trough plate 3. The hydraulic conveying cylinder 402 is started, and its output end pushes the push block 401 to move along the conveying trough plate 3 towards the support column 1. The arc-shaped protrusion on the top of the push block 401 helps to push the material smoothly into the working area. When the push block 401 moves to the end of its stroke, its combination plate 4012 extends to the outside of the support column 1 to ensure that the material is completely pushed into the cutting area and that the push block 401 does not interfere with the actuation plate 1402 of the transmission component 14.

[0058] The rear hydraulic cylinder 5 is started, and its output end pushes the extrusion plate 7 downward to press and fix the scrap steel material to be cut, preventing it from shifting during the cutting process;

[0059] When the front hydraulic cylinder 5 is started, it pushes the connecting horizontal plate 8 and the cutting blade 9 downward to cut. If the cutting blade 9 encounters a material with high hardness during the downward movement, the cutting resistance will increase, which will cause the cutting blade 9 to compress the shock-absorbing spring 901 upward relative to the connecting horizontal plate 8. At this time, the enlarged end of the connecting rod 11 slides in the telescopic cavity 10, which plays a buffering role.

[0060] During the conveying process of scrap steel materials in the conveying trough 3, they will come into contact with the actuating plate 1402 and push it to rotate. The actuating plate 1402 drives the connecting rod 1401 to rotate, overcoming the elastic force of the spiral spring 14012. The rotation of the connecting rod 1401 drives the first crank 1404 and the second crank 1406 integrated with it to rotate clockwise synchronously.

[0061] The first crank 1404 pushes the push plate 1501 into the moving cavity 12 via the inclined push rod 1405.

[0062] The second crank 1406 pushes the push cylinder 1408 to move closer to the pilot pressure reducing valve 1412 via the adjusting rod 1407;

[0063] When the push cylinder 1408 moves, the spiral groove 1410 on its inner wall drives the starting rod 1411 to rotate through the arc head extrusion rod 1413. The rotation angle of the starting rod 1411 is proportional to the displacement of the push cylinder 1408, thereby precisely adjusting the set pressure of the pilot pressure reducing valve 1412. This pressure change is fed back to the hydraulic system to adjust the output force of the front hydraulic cylinder 5 in real time, so as to achieve the effect of adaptive adjustment of cutting force according to the thickness and quantity of material, and avoid damage to the cutting tool.

[0064] When the push plate 1501 moves into the moving cavity 12, it drives the extrusion wedge 1502 to move. Due to the movement of the extrusion wedge 1502, the contact height between the second connecting block 1505 and the extrusion wedge 1502 will increase. When the output stroke of the hydraulic cylinder 5 is the same, this will cause the cutting blade 9 to press down deeper. Then, the rubber plate 1506 generates huge friction force to lock the relative position of the connecting horizontal plate 8 and the cutting blade 9. This will not affect the normal cutting effect of the cutting blade 6, and can also increase the cutting depth according to the thickness of the scrap steel material, ensuring sufficient shearing and preventing the material from being cut through. This significantly improves the shearing quality and throughput. Conversely, when the scrap steel material is thin, the contact height between the extrusion wedge 1502 and the first connecting block 1504 and the second connecting block 1505 will decrease. As a result, when the hydraulic cylinder 5 outputs the same amount, its cutting gap will be relatively small. This avoids the blade from idling, dry grinding and excessive wear due to the small gap while meeting the shearing effect, effectively slowing down the blade wear rate.

[0065] The cut scrap steel material falls onto the inclined plate 101 and slides out of the device along its inclined surface, completing the entire recycling and shearing process. Furthermore, with the arc head setting of the actuating plate 1402, it will not limit the push block 401, thereby completing the shearing and processing of scrap steel and ensuring the normal operation of the device. This application highlights the innovative structure and does not elaborate too much on existing mature technologies, such as hydraulic cylinder 5 and pilot-operated pressure reducing valve 1412.

[0066] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

Claims

1. A gantry shearing device for scrap steel recycling, comprising two support columns (1), a fixed beam (2) fixedly installed on the top of the two support columns (1), a conveying trough plate (3) fixedly installed on the rear of the two support columns (1), and a pushing component (4) provided on the rear side of the inner wall of the conveying trough plate (3). Two sets of hydraulic cylinders (5) are fixedly installed on the top of the fixed beam (2), a cutting blade plate (6) is provided at the output end of the front set of hydraulic cylinders (5), and a pressing plate (7) is fixedly installed at the output end of the rear set of hydraulic cylinders (5), characterized in that: The cutting blade plate (6) includes a connecting horizontal plate (8) and a cutting blade body (9) disposed at the bottom of the connecting horizontal plate (8). The upper side of the inside of the cutting blade body (9) is provided with several telescopic cavities (10), and the inner walls of the several telescopic cavities (10) are slidably installed with connecting rods (11). The two support columns (1) are provided with moving cavities (12) on one side of the connecting horizontal plate (8) and the cutting blade (9), and the conveying trough plate (3) is provided with transmission cavities (13) on both the front and rear sides near the fixed beam (2). The inner walls of the two transmission cavities (13) are provided with transmission components (14), and the inner walls of the moving cavities (12) are provided with moving components (15).

2. The gantry shearing device for scrap steel recycling according to claim 1, characterized in that: The pushing component (4) includes a pushing block (401) that is slidably installed on the rear side of the inner wall of the conveying trough plate (3). A hydraulic conveying cylinder (402) is provided on the rear side of the conveying trough plate (3). Its output end is fixedly connected to the surface of the pushing block (401). A support leg (403) is fixedly installed on the side of the bottom of the cylinder away from the conveying trough plate (3). The push block (401) includes a vertical push plate (4011), the top of which is integrally formed with an arc-shaped protrusion for assisting in pushing materials. A combination plate (4012) is fixedly installed on the side surface of the vertical push plate (4011) away from the fixed beam (2). The combination plate (4012) extends along the material conveying direction and its length is configured to extend to the outside of the support column (1) at the end of the pushing stroke.

3. The gantry shearing device for scrap steel recycling according to claim 1, characterized in that: An inclined material discharge plate (101) is fixedly installed below the opposite inner sides of the two support columns (1). The upper surface of the inclined material discharge plate (101) is on the same horizontal plane as the bottom surface of the inner wall of the conveying trough plate (3). The inclined material discharge plate (101) has a downward inclined surface, and the side of the inclined surface away from the support column (1) extends outward horizontally to form a material discharge section.

4. The gantry shearing device for scrap steel recycling according to claim 1, characterized in that: The number of hydraulic cylinders (5) in each group is two. The output ends of both groups of hydraulic cylinders (5) pass through the fixed beam (2) downward and extend below it. The output end of the first group of hydraulic cylinders (5) is fixedly connected to the top of the connecting cross plate (8). Each of the connecting rods (11) has an enlarged end, which is slidably fitted into the telescopic cavity (10) corresponding to the cutting blade body (9). The upper end of the connecting rod (11) passes through the top of the cutting blade body (9) and extends upward, and is fixedly connected to the bottom of the connecting horizontal plate (8). A shock-absorbing spring (901) is provided on the rod wall of the connecting rod (11) between the connecting horizontal plate (8) and the cutting blade body (9).

5. The gantry shearing device for scrap steel recycling according to claim 1, characterized in that: The transmission assembly (14) includes a connecting rod (1401) that is rotatably mounted on the inner wall of the transmission cavity (13), and the ends of the connecting rod (1401) extend through the transmission cavity (13) to the interior of the conveying trough plate (3). A toggle plate (1402) is fixedly installed on the rod wall of the connecting rod (1401) inside the conveying trough plate (3). The transmission cavity (13) and the moving cavity (12) are both provided with a connecting oblique opening (1403). A first crank (1404) is provided on one side of the connecting rod (1401) located at the connecting oblique opening (1403). An oblique push rod (1405) is rotatably mounted inside the first crank (1404). A second crank (1406) is provided on the rear side of the connecting rod (1401) located behind the first crank (1404). An adjusting rod (1407) is rotatably mounted on the inner wall of the second crank (1406). The end of the adjusting rod (1407) away from the second crank (1406) is rotatably mounted with a push cylinder (1408). The upper and lower surfaces of the push cylinder (1408) are combined with sliding positioning blocks (1409). The inner wall of the push cylinder (1408) is provided with a spiral groove (1410). A starting rod (1411) is coaxially sleeved inside it. One end of the starting rod (1411) is provided with a pilot pressure reducing valve (1412) and is driven connected to the adjusting end of the pilot pressure reducing valve (1412). An arc-head extrusion rod (1413) is fixedly installed on the rod wall of the starting rod (1411). The end of the arc-head extrusion rod (1413) is slidably embedded in the spiral groove (1410).

6. The gantry shearing device for scrap steel recycling according to claim 5, characterized in that: The bottom of the actuating plate (1402) has an arc-shaped transition surface near the side away from the fixed beam (2). One end of the inclined push rod (1405) passes through the connecting inclined opening (1403) and extends into the interior of the moving cavity (12). The width of the connecting inclined opening (1403) is greater than the outer diameter of the inclined push rod (1405), and an active gap is formed between the two.

7. A gantry shearing device for scrap steel recycling according to claim 5, characterized in that: A limiting plate (14011) is fixedly mounted on the rod segment near the end of the connecting longitudinal rod (1401). A spiral spring (14012) is fixedly installed on the limiting plate (14011). The spiral spring (14012) is arranged around the outside of the connecting longitudinal rod (1401), with its inner end fixedly connected to the limiting plate (14011) and its outer end fixedly connected to the inner wall of the transmission cavity (13).

8. A gantry shearing device for scrap steel recycling according to claim 5, characterized in that: The first crank (1404) and the second crank (1406) are integral with the connecting rod (1401), and the first crank (1404) and the second crank (1406) are disconnected. They are connected by a rotating joint to form a complete crank transmission structure. The opposite sides of the two positioning blocks (1409) are fixedly connected to the upper and lower inner walls of the transmission cavity (13). One end of the pilot pressure reducing valve (1412) is fixedly connected to the inner wall of the transmission cavity (13). When the first crank (1404) rotates clockwise, it drives the push cylinder (1408) to move closer to the pilot pressure reducing valve (1412). At the same time, the second crank (1406) rotates clockwise with the first crank (1404) and drives the inclined push rod (1405) to move into the moving cavity (12).

9. A gantry shearing device for scrap steel recycling according to claim 5, characterized in that: The moving assembly (15) includes a push plate (1501) slidably mounted on one side of the inner wall of the moving cavity (12), and a pressing oblique block (1502) is slidably mounted on the side of the push plate (1501) near the connecting horizontal plate (8). A sliding opening (1503) is provided on the side of the moving cavity (12) near the cutting blade (9). A first connecting block (1504) is fixedly mounted on the end of the surface of the cutting blade (9) near the moving cavity (12), and a second connecting block (1505) is fixedly mounted on the side of the connecting horizontal plate (8) near the moving cavity (12).

10. A gantry shearing device for scrap steel recycling according to claim 9, characterized in that: The surface of the push plate (1501) is rotatably connected to one end of the inclined push rod (1405). The first connecting block (1504) and the second connecting block (1505) extend into the interior of the moving cavity (12) through corresponding sliding openings (1503), and their outer walls are tightly slidably engaged with the inner wall of the sliding opening (1503). The extrusion inclined block (1502) is disposed between the first connecting block (1504) and the second connecting block (1505). The bottom of the second connecting block (1505) is provided with an inclined surface, which is adapted to the corresponding inclined surface of the extrusion inclined block (1502). The initial position of the extrusion inclined block (1502) is spaced apart from the first connecting block (1504). Rubber plates (1506) are fixedly provided on the opposing surfaces of the extrusion block (1502) and the first connecting block (1504) to increase the frictional resistance when the two are in contact. The sliding fit between the connecting horizontal plate (8) and the extrusion inclined block (1502), and the sliding fit between the push cylinder (1408) and the positioning block (1409) are both guide structures in which the trapezoidal groove and the trapezoidal block cooperate. In the cooperation structure between the connecting horizontal plate (8) and the extrusion inclined block (1502), a damping spring is also provided below the trapezoidal block at the bottom of the extrusion inclined block (1502). The damping spring is used to elastically support the extrusion inclined block (1502) at the initial position in the middle of its stroke.

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