Scrap metal compression device

Abstract

The present invention relates to the technical field of scrap metal compression, specifically a scrap metal compression device, including a compression box, a cushion layer fixedly connected to the top of the compression box, an assembly plate fixedly connected to the upper side of the cushion layer, two mounting seats arranged on the top of the assembly plate, a rotating shaft arranged between the two mounting seats, a hydraulic cylinder arranged outside the rotating shaft, and a liquid pump and a control system connected to the other end of the hydraulic cylinder. The scrap metal compression device described in the present invention drives the movement of the automatic separation component through the movement of the guide bar. During the movement of the automatic separation component, the protruding part of the metal table is adjusted to be located at the bottom of the pressure plate, and then pressed down for the second time, so that there is no need to adjust the position manually, saving the waiting time for manual adjustment of the position, so that the equipment has the function of rapid compression, while also reducing the risk of manual adjustment of the position and eliminating safety hazards.

Description

Technical Field

[0001] The invention relates to the technical field of waste metal compression, in particular to a waste metal compression device. Background Art

[0002] As a green and environmentally friendly equipment, scrap metal compressor can press scrap metal into cakes to reduce its volume, making it easier to store and transport. It can also achieve resource recycling and facilitate subsequent iron smelting processing. Scrap metal compressors are more common in scrap recycling stations.

[0003] A Chinese patent with publication number CN111448058B discloses a scrap metal compressor, which includes an upper compression cover that applies a certain force to the inside of a main body; it also includes a slide that applies a certain force to the inside of the main body from the side of the main body, so that the scrap metal is compressed inside the main body; by reducing the steps of feeding into the furnace and the deformation in the pressure channel, more efficient production is achieved and dangerous situations during the packaging and melting process are prevented.

[0004] In the above-mentioned prior art, although the compression process of scrap metal can be completed, due to the different shapes of scrap metal and the high size of some scrap metals, such as metal tables, it is difficult to compress them in one go. Workers are required to suspend the power supply and adjust it before compressing it again, which is a relative waste of time and work efficiency and poses a safety hazard. Therefore, the present invention provides a scrap metal compression device to solve the above problems. Summary of the invention

[0005] To this end, the technical problem to be solved by the present invention is to overcome the problem in the prior art that some scrap metals have a high structure, which makes it difficult to compress them in one go, and requires workers to pause the power supply to adjust and then compress them a second time, which is a relative waste of time and work efficiency, and there are safety hazards.

[0006] To solve the above technical problems, the present invention provides a scrap metal compression device, including a compression box, a cushion layer is fixedly connected to the top of the compression box, an assembly plate is fixedly connected to the upper side of the cushion layer, two mounting seats are arranged on the top of the assembly plate, a rotating shaft is arranged between the two mounting seats, a hydraulic cylinder is arranged outside the rotating shaft, the other end of the hydraulic cylinder is externally connected to a liquid pump and a control system, a hydraulic rod is telescopically connected to the inner cavity of the hydraulic cylinder, a pressure plate is fixedly connected to the end of the hydraulic rod away from the hydraulic cylinder, a block shaft is arranged at the bottom of the pressure plate in the inner cavity of the compression box; an adjusting component is arranged at the bottom end of the pressure plate, the adjusting component is used to adjust the position of the metal table placed in the compression box, a stretching component is arranged at the top end of the block shaft, the stretching component is used to push the metal table forward or backward, which is convenient for packaging and transportation, and assists in adjusting the compressed scrap metal workpieces.

[0007] Furthermore, the adjustment component includes a central axis installed in the inner cavity of the compression box, and the outer sides of both ends of the central axis are connected with guide rails, the outer surface of the central axis is fixed with an arc plate, the top of the arc plate is connected with a first support rod, and the end of the first support rod away from the arc plate is provided with a receiving plate, the bottom end of the receiving plate is slidably connected with the guide rail, and the end of the receiving plate away from the first support rod is provided with an insertion rod, and the other end of the insertion rod of the receiving plate is fixed with a guide bar.

[0008] Furthermore, the inner cavity of the guide rail is slidably connected to the guide bar, and the guide bar is gradually reset to drive the protruding part to gradually approach the pressure plate, so that the protruding part of the metal table is adjusted to be located at the bottom of the pressure plate, and then pressed down for a second time. In this way, there is no need to manually adjust the position. The central axis passes through the pressure plate and extends to the inner cavity of the compression box.

[0009] Furthermore, the central axis is fixedly connected to the pressure plate, the central axis is arranged to pass through the guide rail 1 and the arc plate, the guide rail 1 is fixedly connected to the central axis, the arc plate is rotatably arranged outside the central axis, and an automatic separation component is arranged on the top of the guide bar. The automatic separation component is used to push and lock the metal table or special-shaped metal waste parts to facilitate the adjustment of the compression position of the waste metal.

[0010] Furthermore, the automatic separation component includes two electric telescopic cylinders, which are fixed to the inner cavity of the guide bar, and an electric telescopic rod is telescopically arranged inside the electric telescopic cylinder, a plate is fixed to the top of the electric telescopic rod, and two locks are fixed to the plate sides of the electric telescopic rod, and reset springs are arranged at the sides of the two locks, and a hook is fixed to the top of the reset spring, and a lock cavity is arranged at the top of the electric telescopic rod on the other side, and an electromagnet 1 is arranged inside the lock cavity, and a limit groove 1 and a limit groove 2 corresponding to the lock head are opened inside the lock cavity, and an electromagnet 2 is arranged in the limit groove 2 of the lock cavity.

[0011] Furthermore, the electromagnet 2 and the electromagnet 1 are respectively the positive pole and the negative pole, and the distance formed by the limiting groove 1 and the limiting groove 2 of the lock cavity is equal to the plug-in distance of the lock head.

[0012] Furthermore, the second electromagnet is provided as a flat disc, the first electromagnet is provided to penetrate the interior of the lock cavity, and the combination of the first limiting groove and the second limiting groove is in a "U" shape.

[0013] Furthermore, the stretching assembly includes a pressure block, a cylinder is fixedly connected to the inside of the pressure block, a piston rod and a middle tube are arranged on the side of the cylinder away from the pressure block, a vertical plate is fixedly connected to the top of the piston rod, a cone head is arranged on the side of the vertical plate away from the middle tube, two limiting grooves are provided on the outer wall of the cone head, clamps are symmetrically arranged inside the two limiting grooves, one end of the two clamps close to the inner cavity of the cone head is slidably connected to the two guide rails, and an electromagnetic valve is arranged on the inner wall of the cone head between the two guide rails.

[0014] Furthermore, the interiors of the middle tube and the cone head are both hollow, the solenoid valve has the same magnetic properties as the clamp, and the other end of the middle tube extends into the gas-compressing part of the cylinder.

[0015] Furthermore, a recessed groove is provided in the middle of the pressing block, and a cylinder is arranged inside the recessed groove. The middle tube and the piston rod can be retracted inside the cylinder as required.

[0016] The above technical solution of the present invention has the following advantages compared with the prior art:

[0017] 1. The scrap metal compression device described in the present invention drives the movement of the automatic separation component through the movement of the guide bar. During the movement of the automatic separation component, it will gradually hook the protruding part of the metal table or the special-shaped metal part, and as the compression operation proceeds, the guide bar will gradually reset to drive the protruding part gradually approaching the pressure plate, and the metal table will be adjusted to be located at the bottom of the pressure plate, and then pressed down for a second time. In this way, there is no need for manual position adjustment, which saves the waiting time for manual position adjustment, and enables the equipment to have the function of rapid compression. At the same time, it also reduces the risk of manual position adjustment and eliminates safety hazards.

[0018] 2. The scrap metal compression device described in the present invention drives the piston rod to extend from the inside of the cylinder through the cylinder, the piston rod pushes the pressure plate to move, and the pressure plate pushes the cone head to move, thereby nailing the cone head into the block of metal table. At the same time, the operation of the solenoid valve generates magnetic force, and the clamp is repelled by the magnetic force and gradually extends from the inside of the cone head along the second guide rail, thereby being stuck in the scrap metal block. In this way, during the process of resetting the block shaft, the scrap metal block can be dragged by the cone head and the clamp to make it close to one side of the pressure plate, which is convenient for the compression operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the hydraulic cylinder of the present invention;

[0022] Figure 3 It is a schematic diagram of the arc plate structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the receiving plate of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the electric telescopic rod of the present invention;

[0025] Figure 6 It is a schematic diagram of the lock cavity structure of the present invention;

[0026] Figure 7 It is a schematic diagram of the briquetting structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the piston rod structure of the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the solenoid valve of the present invention.

[0029] Explanation of the reference numerals in the drawings in the specification: 1. compression box; 2. cushion layer; 3. assembly plate; 4. placement seat; 5. hydraulic cylinder; 6. hydraulic rod; 7. pressure plate; 8. block shaft; 71. middle shaft; 72. guide rail one; 73. arc plate; 74. first support rod; 75. receiving plate; 76. guide strip; 761. electric telescopic cylinder; 762. electric telescopic rod; 763. locking head; 764. hook; 765. lock chamber; 766. electromagnet one; 767. electromagnet two; 81. pressure block; 82. cylinder; 83. middle cylinder tube; 84. piston rod; 85. vertical plate; 86. cone head; 87. clamp; 88. guide rail two; 89. solenoid valve. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0031] Reference Figure 1 As shown, a scrap metal compression device of the present invention comprises a compression box 1, a cushion layer 2 is fixedly connected to the top of the compression box 1, an assembly plate 3 is fixedly connected to the upper side of one side of the cushion layer 2, two mounting seats 4 are arranged on the top of the assembly plate 3, a rotating shaft is arranged between the two mounting seats 4, a hydraulic cylinder 5 is arranged outside the rotating shaft, the other end of the hydraulic cylinder 5 is externally connected to a liquid pump and a control system, a hydraulic rod 6 is telescopically connected to the inner cavity of the hydraulic cylinder 5, a pressing plate 7 is fixedly connected to the end of the hydraulic rod 6 away from the hydraulic cylinder 5, a block shaft 8 is arranged at the bottom of the pressing plate 7 in the inner cavity of the compression box 1; an adjusting component is arranged at the bottom end of the pressing plate 7, the adjusting component is used to adjust the position of the metal table placed in the compression box 1, a stretching component is arranged at the top end of the block shaft 8, the stretching component is used to align the metal table, to facilitate packaging and transportation, and to assist in adjusting the compressed scrap metal workpiece.

[0032] like Figure 1 to Figure 2As shown, when working, in the process of compressing scrap metal, first put the metal table into the compression box 1 through the conveyor belt, then start the liquid pump and the control system, the hydraulic rod 6 extends from the hydraulic cylinder 5 and pushes the pressure plate 7 to gradually move obliquely downward, the pressure plate 7 gradually contacts and squeezes the metal table or the special-shaped scrap metal parts, and under the action of the squeezing force, the metal table is compressed into a block, thereby achieving the purpose of compression. However, during use, there is usually a situation where the legs of the metal table or the corners of the special-shaped metal parts are higher than the depth of the compression box 1, so that the protruding parts of the table or the special-shaped metal parts are often omitted during the compression process. When encountering this situation, traditional equipment needs to manually adjust the position of the object to be compressed. When using the embodiment of the present invention, during the compression process, the protruding part of the metal table or the special-shaped scrap metal parts is pushed by the adjusting component, thereby adjusting the position of the metal table or the special-shaped scrap metal parts, so that the omitted part is compressed again, thus solving the problem that the metal table needs to be manually adjusted in position to be thoroughly compressed. It should be noted that the conveyor belt is a prior art and will not be described in detail.

[0033] The adjustment assembly includes a central axis 71 installed in the inner cavity of the compression box 1, the central axis 71 passes through the pressure plate 7 and extends to the inner cavity of the compression box 1, the central axis 71 is fixedly connected to the pressure plate 7, the outer sides of both ends of the central axis 71 are connected with guide rails 72, the inner cavity of the guide rail 72 is slidably connected with the guide bar 76, the outer surface of the central axis 71 is fixedly connected with an arc plate 73, the arc plate 73 is rotatably arranged outside the central axis 71, the central axis 71 passes through the guide rail 72 and the arc plate 73, and the top of the arc plate 73 is connected with a first support rod 7 4. A receiving plate 75 is arranged at one end of the first support rod 74 away from the arc plate 73. The bottom end of the receiving plate 75 is slidably connected to the guide rail 72. An insert rod is arranged at one end of the receiving plate 75 away from the first support rod 74. A guide bar 76 is fixedly connected to the other end of the insert rod of the receiving plate 75. An automatic separation component is arranged at the top of the guide bar 76. The automatic separation component is used to push and lock the metal table or special-shaped metal waste parts to facilitate the adjustment of the compression position of the waste metal and save the time of manual adjustment.

[0034] like Figures 2 to 4As shown, during operation, however, during the compression process, there is usually a situation where the legs of a metal table or the corners of a special-shaped metal piece are higher than the depth of the compression box 1. In this way, the raised parts of the table or the special-shaped metal piece are often missed during the compression process. When encountering this situation, the traditional equipment needs to manually adjust the position of the object to be compressed. When using the embodiment of the present invention, when the pressing plate 7 is pressed down and rotated with the central axis 71 as the axis, the central axis 71 deflects together with the pressing plate 7, and the rotation of the central axis 71 drives the arc plate 73 to rotate. The rotation of the arc plate 73 pulls the first support rod 74 to move, and the movement of the first support rod 74 pushes the receiving plate 75 to move. At this time, the receiving plate 75 It will drive the guide bar 76 to slide along the guide rail 72, and the movement of the guide bar 76 will drive the automatic separation component to move. During the movement of the automatic separation component, it will gradually hook the protruding part of the metal table or the special-shaped metal part, and as the compression operation proceeds, the guide bar 76 will gradually reset and drive the protruding part to gradually approach the pressure plate 7, and adjust the metal table to be located at the bottom of the pressure plate 7, and then press down for the second time. In this way, there is no need for manual adjustment of the position, saving the waiting time for manual adjustment of the position, so that the equipment has the function of rapid compression, while also reducing the risk of manual adjustment of the position and eliminating safety hazards.

[0035] The automatic separation component includes two electric telescopic cylinders 761, which are fixed to the inner cavity of the guide bar 76. The electric telescopic cylinder 761 is telescopically provided with an electric telescopic rod 762. A plate is fixed to the top of the electric telescopic rod 762. Two locks 763 are fixed to the side of the plate of the electric telescopic rod 762. Reset springs are provided at the sides of the two locks 763. A hook 764 is fixed to the top of the reset spring. A lock cavity 765 is provided at the top of the electric telescopic rod 762 on the other side. The distance between the limit grooves 1 and 2 of the lock cavity 765 is formed. The plug-in distance with the lock head 763 is equal, and an electromagnet 1 766 is arranged inside the lock cavity 765. The electromagnet 1 766 runs through the interior of the lock cavity 765. The lock cavity 765 is provided with a limit groove 1 and a limit groove 2 corresponding to the lock head 763. The combination of the limit groove 1 and the limit groove 2 is a "U" shape. An electromagnet 2 767 is arranged in the limit groove 2 of the lock cavity 765. The electromagnet 2 767 is a flat disc. The electromagnet 2 767 and the electromagnet 1 766 are positive and negative poles respectively.

[0036] like Figures 3 to 6As shown, when the edge of the metal table or the special-shaped metal waste is pushed, the guide bar 76 moves to drive the electric telescopic cylinder 761 to move synchronously. When the guide bar 76 moves to the highest point, the pressing plate 7 just completes the compression operation. At this time, the electric telescopic rod 762 extends from the inside of the electric telescopic cylinder 761, thereby driving the lock head 763 to move. At this time, the two lock heads 763 move toward each other until the hook 764 and the lock head 763 are gradually inserted into the limit groove 1 of the lock cavity 765. During the insertion process, the hook 76 The return spring is restricted by the shape of the first limiting groove on the outer side of the lock cavity 765, so that the hook 764 is deformed, so that the hook 764 is retracted into the lock head 763. When the lock head 763 is continuously inserted into the second limiting groove on the innermost side of the lock cavity 765, the hook 764 does not contact the inner side wall of the lock cavity 765, and the return spring gradually returns to its original position, thereby driving the hook 764 to be inserted into the second limiting groove on the innermost side of the lock cavity 765. Through the cooperation of the lock head 763, the hook 764 and the lock cavity 765, the plate of the lock cavity 765 and the lock head 763 is promoted. Combined to form a whole, thus forming a cross bar arranged outside the compression box 1, so that when the compression block is reset, the cross bar will hook the protruding part of the metal table or the special-shaped metal waste and move toward the direction of the pressing plate 7, so as to achieve the effect of automatically adjusting the position of the metal table or the special-shaped metal waste, which is convenient for the compression operation; it should be noted that when the automatic separation is performed, the electromagnet 1 766 is inserted into the lock cavity 765, the magnetic property of the lock cavity 765 is, and the electromagnet 2 767 Opposite to the magnetic pole of electromagnet 1 766, electromagnet 1 766 is the negative pole, and electromagnet 2 767 is adsorbed by electromagnet 1 766 and displaced. Electromagnet 2 767 is displaced outward to push hook 764, and the reset spring on hook 764 is deformed. Hook 764 extends outward from the innermost limit groove 2, and hook 764 is separated from limit groove 1 and limit groove 2 of lock cavity 765, thereby having the function of automatic separation, preventing a horizontal bar formed during locking from hindering the removal of the metal table in compression box 1.

[0037] The stretching assembly includes a pressing block 81, a recessed groove is provided in the middle of the pressing block 81, a cylinder 82 is provided inside the recessed groove, the cylinder 82 is fixedly connected inside the pressing block 81, a piston rod 84 and a middle tube 83 are provided on the side of the cylinder 82 away from the pressing block 81, the middle tube 83 and the piston rod 84 can be retracted inside the cylinder 82 as needed, the insides of the middle tube 83 and the cone head 86 are both provided with cavities, a vertical plate 85 is fixedly connected to the top of the piston rod 84, a cone head 86 is provided on the side of the vertical plate 85 away from the middle tube 83, the other end of the middle tube 83 extends into the part of the cylinder 82 compressing gas, a limiting groove 2 is provided on the outer wall of the cone head 86, a clamp 87 is symmetrically provided inside the limiting groove 2, one end of the two clamps 87 close to the inner cavity of the cone head 86 is slidably connected with a guide rail 2 88, an electromagnetic valve 89 is provided on the inner wall of the cone head 86 between the guide rails 2 88, and the electromagnetic valve 89 has the same magnetic properties as the clamp 87.

[0038] like Figures 7 to 9 As shown, after the metal table or special-shaped metal waste parts are compressed, the block shaft 8 is driven to operate through the control system, and the block shaft 8 pushes the pressing block 81 to move. The pressing block 81 secondarily squeezes the compressed metal table or special-shaped metal waste parts, and the waste metal is compressed and gradually becomes a block. At the same time, with the pulling force of the automatic separation component, the waste metal is subjected to forces in two opposite directions, which facilitates the dumping and flipping of the waste metal, thereby ensuring the one-time success rate of adjusting the position of the waste metal. At the same time, during the resetting process of the block shaft 8, the waste metal block has been flipped. At this time, the cylinder 82 can be started to drive the piston rod 84 to extend out from the inside of the cylinder 82, and the piston rod 84 pushes the vertical plate 85 to move, and the vertical plate 85 pushes The movable cone head 86 moves, thereby nailing the cone head 86 into the block of metal table. At the same time, the electromagnetic valve 89 generates magnetic force, and the clamp 87 is repelled by the magnetic force and gradually extends from the inside of the cone head 86 along the guide rail 88, thereby being clamped into the inside of the scrap metal block. In this way, during the resetting process of the block shaft 8, the scrap metal block can be dragged by the cone head 86 and the clamp 87, so that it is close to one side of the pressure plate 7, which is convenient for the compression operation. It should be noted that after use, the cylinder 82 retracts the gas, the electromagnetic valve 89 retracts the inner wall of the cone head 86, and the magnetism of the electromagnetic valve 89 and the clamp 87 disappears, thereby having the function of accelerating regulation, and the lifting equipment has the function of improving work efficiency.

[0039] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A scrap metal compression device, characterized in that: It comprises a compression box (1), the top of which is fixedly connected to a cushion layer (2), an assembly plate (3) is fixedly connected to the upper side of one side of the cushion layer (2), two mounting seats (4) are arranged on the top of the assembly plate (3), a rotating shaft is arranged between the two mounting seats (4), a hydraulic cylinder (5) is arranged outside the rotating shaft, the other end of the hydraulic cylinder (5) is externally connected to a liquid pump and a control system, a hydraulic rod (6) is telescopically connected to the inner cavity of the hydraulic cylinder (5), the end of the hydraulic rod (6) away from the hydraulic cylinder (5) is fixedly connected to a pressing plate (7), and a block shaft (8) is arranged at the bottom of the pressing plate (7) in the inner cavity of the compression box (1); an adjusting component is arranged at the bottom end of the pressing plate (7), and the adjusting component is used to adjust the position of a metal table placed in the compression box (1); a stretching component is arranged at the top end of the block shaft (8), and the stretching component is used to push the metal table forward or backward, so as to facilitate packaging and transportation, and assist in adjusting the compressed waste metal workpiece; The adjustment assembly comprises a central axis (71) installed in the inner cavity of the compression box (1), the outer sides of both ends of the central axis (71) are connected to guide rails (72), the outer surface of the central axis (71) is fixedly connected to an arc plate (73), the top of the arc plate (73) is connected to a first support rod (74), the end of the first support rod (74) away from the arc plate (73) is provided with a receiving plate (75), the bottom end of the receiving plate (75) is slidably connected to the guide rail (72), the end of the receiving plate (75) away from the first support rod (74) is provided with an insertion rod, and the other end of the insertion rod of the receiving plate (75) is fixedly connected to a guide bar (76); The inner cavity of the guide rail 1 (72) is slidably connected to the guide bar (76), and the central axis (71) passes through the pressure plate (7) and extends to the inner cavity of the compression box (1); The central axis (71) is fixedly connected to the pressure plate (7), the central axis (71) is arranged to pass through the guide rail (72) and the arc plate (73), the guide rail (72) is fixedly connected to the central axis (71), the arc plate (73) is rotatably arranged outside the central axis (71), and an automatic separation component is arranged at the top end of the guide bar (76), and the automatic separation component is used to push and lock the metal table or the special-shaped metal waste, so as to facilitate the adjustment of the compression position of the waste metal.

2. A waste metal compression device according to claim 1, characterized in that: The automatic separation component comprises two electric telescopic cylinders (761), the electric telescopic cylinders (761) being fixedly connected to the inner cavity of the guide bar (76), an electric telescopic rod (762) being telescopically arranged inside the electric telescopic cylinder (761), a plate being fixedly connected to the top end of the electric telescopic rod (762), two lock heads (763) being fixedly connected to the plate side of the electric telescopic rod (762), return springs being arranged at the sides of the two lock heads (763), a hook (764) being fixedly connected to the top end of the return spring, a lock cavity (765) being arranged at the top end of the electric telescopic rod (762) on the other side, an electromagnet 1 (766) being arranged inside the lock cavity (765), a limiting groove 1 and a limiting groove 2 corresponding to the lock heads (763) being provided inside the lock cavity (765), and an electromagnet 2 (767) being arranged inside the limiting groove 2 of the lock cavity (765).

3. A waste metal compression device according to claim 2, characterized in that: The second electromagnet (767) and the first electromagnet (766) are respectively the positive pole and the negative pole, and the distance formed by the first limiting groove and the second limiting groove of the lock cavity (765) is equal to the plugging distance of the lock head (763).

4. A waste metal compression device according to claim 2, characterized in that: The second electromagnet (767) is provided in the form of a flat disc, the first electromagnet (766) is provided to penetrate the interior of the lock cavity (765), and the combination of the first limiting groove and the second limiting groove is in a "U" shape.

5. The scrap metal compression device according to claim 1, characterized in that: The stretching assembly comprises a pressing block (81), a cylinder (82) is fixedly connected inside the pressing block (81), a piston rod (84) and a middle tube (83) are arranged on the side of the cylinder (82) away from the pressing block (81), a vertical plate (85) is fixedly connected to the top end of the piston rod (84), a cone head (86) is arranged on the side of the vertical plate (85) away from the middle tube (83), a limiting groove two is provided on the outer wall of the cone head (86), a clamping piece (87) is symmetrically arranged inside the limiting groove two, and one end of the two clamping pieces (87) close to the inner cavity of the cone head (86) is slidably connected to a guide rail two (88), and a solenoid valve (89) is arranged on the inner wall of the cone head (86) between the guide rails two (88).

6. A waste metal compression device according to claim 5, characterized in that: The interiors of the middle tube (83) and the cone head (86) are both hollow, the solenoid valve (89) has the same magnetic properties as the clamp (87), and the other end of the middle tube (83) extends into the gas-compressing portion of the cylinder (82).

7. A waste metal compression device according to claim 5, characterized in that: A recessed groove is provided in the middle of the pressing block (81), and a cylinder (82) is provided inside the recessed groove. The middle tube (83) and the piston rod (84) can be retracted inside the cylinder (82) as required.

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