Metal solid waste recycling pretreatment device and treatment process

Abstract

The invention relates to the technical field of metal solid waste recycling, in particular to a metal solid waste recycling pretreatment device and process, pipe fittings are sequentially conveyed to the position below a cleaning mechanism one by one through a conveying mechanism, the interior of the pipe fittings is dredged and cleaned through the cleaning mechanism, and impurities in the pipe fittings are cleaned out; and the cleaned pipe fitting in the vertical state is clamped through the clamping and conveying mechanism and conveyed to the cutting mechanism in the horizontal state, and the pipe fitting needing to be cut is automatically cut through the cutting mechanism. According to the metal solid waste recycling system, pretreatment work such as cleaning and cutting before recycling of the waste pipe fittings is completed through all automatic equipment, the working efficiency of the metal solid waste recycling process is improved, a large amount of labor input is avoided, and the metal solid waste recycling system has important significance on resource saving and resource utilization diversification, greenization and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of metal solid waste recycling, and in particular to a metal solid waste recycling pretreatment device and a treatment process. Background Art

[0002] Scrap metal refers to metal fragments and scraps discarded by the metallurgical industry and metal processing industry, as well as metal objects scrapped during equipment renewal. It also includes metal packaging containers and scrapped vehicles recycled from urban garbage. Scrap metal is also a resource. If it cannot be recycled reasonably, it will cause a huge waste of resources. In the process of recycling scrap metal, it is generally necessary to clean up the metal solid waste to prevent debris or other adhesions from affecting the subsequent recycling process.

[0003] Metal square tubes and other metal pipe fittings are widely used in urban construction or equipment manufacturing. As necessary and easily damaged and consumable parts, they have extremely high recycling value. When recycling scrap metal pipe fittings, they generally need to be cut or welded. During the previous use, the pipe fittings are prone to get stuck with debris and adhere to objects such as soil. Therefore, they need to be cleaned before cutting or welding.

[0004] Therefore, there is an urgent need for a device that can pre-treat metal solid waste such as metal pipes for recycling. Summary of the invention

[0005] To solve the above technical problems.

[0006] The present application provides a pretreatment device and treatment process for recycling metal solid waste, including: a conveying mechanism for conveying waste pipe fittings, a cleaning mechanism for cleaning the pipe fittings, and a cutting mechanism for cutting the cleaned pipe fittings that need to be cut, the conveying mechanism, the cleaning mechanism and the cutting mechanism are all installed on a workbench, the cleaning mechanism is located above the conveying mechanism, the cutting mechanism is located on one side of the conveying mechanism and the cleaning mechanism, a recycling box for storing cleaned debris and garbage is provided below the conveying mechanism, and a clamping mechanism for clamping the vertical pipe fittings to a horizontal position for cutting is provided between the conveying mechanism and the cutting mechanism.

[0007] Furthermore, the conveying mechanism includes a conveying frame, a driving assembly and a material-discharging claw. The conveying frame is fixedly installed at the lower end of the workbench, the material-discharging claw is slidably installed on the conveying frame, the driving assembly is installed on the conveying frame and connected to the material-discharging claw. The conveying frame is provided with a material trough for sliding conveying of pipe fittings and a dredging port for cleaning and dredging debris in the pipe fittings, and the dredging port is opposite to the recycling box below.

[0008] Furthermore, the driving assembly includes a driving motor, a pulley transmission module and a cam group. The driving motor is installed below the conveying frame, the cam group is installed on the inner side of the conveying frame and is connected to the driving motor through the pulley transmission module, and the cam group is connected to the material removing claw through a connecting plate.

[0009] Furthermore, the cleaning mechanism includes a cleaning frame, an electric push rod and two dredging arms. The cleaning frame is fixedly mounted on the top of the workbench and extends into the workbench facing the dredging port. The two dredging arms are connected to the electric push rod through a rack-and-rail connecting assembly. The electric push rod is vertically mounted on the top of the cleaning frame, the rack-and-rail connecting assembly is mounted on one side of the lower end of the cleaning frame, and the two dredging arms are fixedly mounted on the rack-and-rail connecting assembly.

[0010] Furthermore, the rack-and-rail connection assembly includes a gear, two racks and a slide rail module. The slide rail module is vertically mounted on the cleaning frame. The two racks are respectively fixedly mounted on the slides of the corresponding slide rail modules. The gear is meshed with the two racks. The gear is connected to the output end of the electric push rod through a gear seat. The two dredging arms are respectively mounted on the bottom of the slides of the corresponding slide rail modules.

[0011] Furthermore, the clamping and conveying mechanism includes a clamping jaw assembly, a driving module and a steering assembly. The clamping jaw assembly is installed on the steering assembly, and the steering assembly and the driving module are connected through a cam-linkage mechanism.

[0012] Furthermore, the cutting mechanism includes a cutting unit, a cutting frame and a transfer and fixing assembly. The cutting unit is fixedly installed on one side of the workbench through the cutting frame, and the transfer and fixing assembly is located below the cutting unit and directly opposite to the clamping mechanism.

[0013] Furthermore, the transfer and fixing assembly includes a support plate, a clamping cylinder and a transfer cylinder. A clamping plate is provided at the end of the clamping cylinder. The clamping cylinder is installed on the cutting frame through a movable slide. The movable slide is installed on the cutting frame through a slide rail. One end of the movable slide passes through the support plate and is provided with a fixing plate at one end away from the clamping cylinder. The output end of the transfer cylinder is fixedly connected to the clamping cylinder, and the other end of the transfer cylinder is fixedly installed on the cutting frame.

[0014] Furthermore, a processing process of a metal solid waste recycling pretreatment device comprises the following steps: Step 1: The waste pipe fittings are transported one by one along the material trough on the conveying frame to the dredging port through the conveying mechanism, and the pipe fittings arranged by the material-dispensing claws are transported in sequence through the driving assembly. The driving motor drives the pulley transmission module and the cam assembly to move, and then drives the connecting plate and the material-dispensing claws to sequentially push the vertically arranged pipe fittings to the bottom of the cleaning mechanism, thereby realizing the automatic loading of waste pipe fittings; Step 2: The two dredging arms are pushed by the electric push rod to dredge the pipes at the two dredging ports on the conveying rack. The electric push rod pushes the gear seat to move downward, thereby driving the gear and the rack meshing with the gear and the slide to move downward synchronously, and the two dredging arms are extended into the corresponding waste pipes. The dredging arms push out the debris stuck in the pipes. However, due to the different debris stuck in each pipe, or some pipes have no debris, the dredging arms may be blocked by debris in the pipes when two adjacent pipes are being cleaned. The debris in one of the pipes will hold up the dredging arm and prevent it from moving downward. The other dredging arm will continue to move downward to dredge due to the meshing between the gear and the rack, so that one of the two dredging arms can continue to move and dredge after the other is blocked. Step 3: Use the clamping jaw assembly to clamp the upper end of the pipe, and the driving module drives the cam-linkage mechanism to move. The cam-linkage mechanism drives the steering assembly, the clamping jaw assembly and the pipe to turn upward. At the same time, the steering assembly rotates to turn the clamping jaw assembly and the pipe over, turning the pipe to a horizontal state, and the other end of the pipe faces the cutting mechanism; Step 4: Use the clamping cylinder, the clamping plate and the fixed plate to clamp the pipe clamped by the clamping mechanism, and then use the mobile cylinder to push the clamping cylinder, the moving slide and the pipe to the cutting unit for cutting. This method can also be used to achieve multi-segment cutting of the pipe. After cutting one section of the pipe, if another section needs to be cut, especially the pipe that is not completely cleared requires multi-segment cutting, the clamping cylinder and the clamping plate are reset, the pipe is loosened, and the pipe is placed on the support plate. The transfer cylinder drives the moving slide, the clamping cylinder and the clamping plate to retract, and then the clamping cylinder works again to clamp the pipe, and the transfer cylinder moves the pipe forward.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In order to solve the technical problems of cleaning and cutting of pipes in the process of recycling scrap metal pipes, the present invention uses a conveying mechanism to transport each pipe one by one to the bottom of a cleaning mechanism, and the cleaning mechanism clears and cleans the inside of the pipe to remove the debris in the pipe, and clamps the pipe in a vertical state after cleaning through a clamping mechanism and transports it to a cutting mechanism in a horizontal state, and the cutting mechanism automatically cuts the pipe to be cut. The present invention completes the pre-processing work of cleaning and cutting of scrap pipes before recycling through various automated equipment, improves the work efficiency of the metal solid waste recycling process, avoids a large amount of manual input, and is of great significance to saving resources and realizing diversified, green and safe resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 3 The three-dimensional structure of the present invention is shown in FIG. Figure 3 ; Figure 4 The three-dimensional structure of the conveying mechanism of the present invention is shown in FIG. Figure 1 ; Figure 5 The three-dimensional structure of the conveying mechanism of the present invention is shown in FIG. Figure 2 ; Figure 6 It is a front view of the cleaning mechanism of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the cleaning mechanism of the present invention; Figure 8 The three-dimensional structure of the cutting mechanism of the present invention is shown in FIG. Figure 1 ; Fig. 9 The three-dimensional structure of the cutting mechanism of the present invention is shown in FIG. Figure 2 ; Fig.10 The three-dimensional structure diagram of the clamping and conveying mechanism of the present invention is shown in FIG. Figure 1 ; Fig.11 The three-dimensional structure diagram of the clamping and conveying mechanism of the present invention is shown in FIG. Figure 2 ; The numbers in the figure are: conveying mechanism-1; cleaning mechanism-2; cutting mechanism-3; workbench-4; recycling box-5; clamping mechanism-6; conveying frame-11; driving assembly-12; material claw-13; material chute-14; dredging port-15; driving motor-16; belt wheel transmission module-17; cam assembly-18; connecting plate-19; cleaning frame-21; electric push rod-22; dredging arm-23; connecting assembly-24; gear -241; rack-242; slide rail module-243; slide-244; cutting unit-31; cutting frame-32; transfer and fixing assembly-33; support plate-331; clamping cylinder-332; transfer cylinder-333; clamping plate-334, movable slide-335; transfer slide-336; fixed plate-337; clamping claw assembly-61; driving module-62; steering assembly-63; cam-link mechanism-64. DETAILED DESCRIPTION

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0018] like Figures 1 to 3 As shown, the following preferred technical solutions are provided: A pretreatment device for recycling and utilizing metal solid waste comprises: a conveying mechanism 1 for conveying waste pipe fittings, a cleaning mechanism 2 for cleaning the pipe fittings, and a cutting mechanism 3 for cutting the cleaned pipe fittings that need to be cut, the conveying mechanism 1, the cleaning mechanism 2 and the cutting mechanism 3 are all installed on a workbench 4, the cleaning mechanism 2 is located above the conveying mechanism 1, the cutting mechanism 3 is located on one side of the conveying mechanism 1 and the cleaning mechanism 2, a recycling box 5 for storing cleaned debris and garbage is arranged below the conveying mechanism 1, and a clamping mechanism 6 for clamping and conveying vertical pipe fittings to a horizontal position for cutting is arranged between the conveying mechanism 1 and the cutting mechanism 3.

[0019] Specifically, in order to solve the technical problems of cleaning and cutting of pipes during the recycling of scrap metal pipes, the present invention uses a conveying mechanism 1 to convey each pipe one by one to the bottom of a cleaning mechanism 2, and the cleaning mechanism 2 clears and cleans the inside of the pipe to remove the debris in the pipe, and clamps the pipe in a vertical state after cleaning through a clamping mechanism 6 and conveys it to a cutting mechanism 3 in a horizontal state, and the cutting mechanism 3 automatically cuts the pipe to be cut. The present invention completes the pre-processing work of cleaning and cutting of scrap pipes before recycling through various automated equipment, improves the work efficiency of the metal solid waste recycling process, avoids a large amount of manual input, and is of great significance to saving resources and realizing diversified, green and safe resource utilization.

[0020] like Figures 1 to 5 As shown, the following preferred technical solutions are provided: The conveying mechanism 1 includes a conveying frame 11, a driving assembly 12 and a material-discharging claw 13. The conveying frame 11 is fixedly installed at the lower end of the workbench 4, and the material-discharging claw 13 is slidably installed on the conveying frame 11. The driving assembly 12 is installed on the conveying frame 11 and connected to the material-discharging claw 13. The conveying frame 11 is provided with a material trough 14 for sliding conveying of pipe fittings and a dredging port 15 for cleaning and dredging debris in the pipe fittings, and the dredging port 15 is directly opposite to the recovery box 5 below.

[0021] The driving assembly 12 includes a driving motor 16, a pulley transmission module 17 and a cam group 18. The driving motor 16 is installed below the conveying frame 11, and the cam group 18 is installed on the inner side of the conveying frame 11 and is connected to the driving motor 16 through the pulley transmission module 17. The cam group 18 is connected to the material removing claw 13 through a connecting plate 19.

[0022] Specifically, in order to solve the technical problem of feeding waste metal pipes, the present invention uses the conveying mechanism 1 to convey the waste pipes one by one along the material trough 14 on the conveying frame 11 to the dredging port 15, and the driving assembly 12 sequentially conveys the pipes arranged by the material-dispensing claws 13, and the driving motor 16 drives the pulley transmission module 17 and the cam group 18 to move, thereby driving the connecting plate 19 and the material-dispensing claws 13 to sequentially transfer the vertically arranged pipes to the bottom of the cleaning mechanism 2, thereby realizing the automatic feeding of waste pipes. An adjusting device capable of adjusting the size of the dredging port 15 can be installed at the dredging port 15.

[0023] like Figures 1 to 7 As shown, the following preferred technical solutions are provided: The cleaning mechanism 2 includes a cleaning frame 21, an electric push rod 22 and two dredging arms 23. The cleaning frame 21 is fixedly mounted on the top of the workbench 4 and extends into the workbench 4 facing the dredging port 15. The two dredging arms 23 are connected to the electric push rod 22 through a rack connection assembly 24. The electric push rod 22 is vertically mounted on the top of the cleaning frame 21. The rack connection assembly 24 is mounted on one side of the lower end of the cleaning frame 21. The two dredging arms 23 are fixedly mounted on the rack connection assembly 24.

[0024] The rack-and-rail connection assembly 24 includes a gear 241, two racks 242 and a slide rail module 243. The slide rail module 243 is vertically mounted on the cleaning frame 21. The two racks 242 are respectively fixedly mounted on the slides 244 corresponding to the slide rail modules 243. The gear 241 is meshed with the two racks 242. The gear 241 is connected to the output end of the electric push rod 22 through a gear seat. The two dredging arms 23 are respectively mounted at the bottom of the slides 244 corresponding to the slide rail modules 243.

[0025] Specifically, in order to solve the technical problem of clearing and unclogging the inside of waste pipe fittings, the present invention clears the pipe fittings located at the two clearing ports 15 on the conveying frame 11 by pushing the two clearing arms 23 through the electric push rod 22. The electric push rod 22 pushes the gear seat to move downward, thereby driving the gear 241 and the rack 242 meshing with the gear 241 and the slide 244 to move downward synchronously, and extends the two clearing arms 23 into the corresponding waste pipe fittings. The clearing arms 23 push out the debris stuck in the pipe. Since the debris stuck in each pipe is different, or some pipes do not have debris, the clearing arms 23 may be blocked by debris in the pipes when two adjacent pipe fittings are being cleaned. The debris in one of the pipe fittings will hold the clearing arm 23 and prevent it from continuing to move downward. The other clearing arm 23 will continue to move downward for clearing due to the meshing between the gear 241 and the rack 242, thereby achieving the purpose of enabling one of the two clearing arms 23 to continue to move and clear after the other is blocked. The structure of the dredging arm 23 can be optimized, for example, an air gun can be installed on the dredging arm 23 so that the air gun can be used to blow air into the pipe while dredging, making the cleaning more thorough.

[0026] like Fig.10 and Fig.11 As shown, the following preferred technical solutions are provided: The clamping and conveying mechanism 6 includes a clamping jaw assembly 61 , a driving module 62 and a steering assembly 63 . The clamping jaw assembly 61 is mounted on the steering assembly 63 . The steering assembly 63 and the driving module 62 are connected to each other through a cam-link mechanism 64 .

[0027] Specifically, in order to solve the technical problem that the pipe fittings in a vertical state after cleaning are clamped horizontally and sent to the cutting position, the present invention utilizes the clamping jaw assembly 61 to clamp the upper end of the pipe fitting, the driving module 62 drives the cam-link mechanism 64 to move, and the cam-link mechanism 64 drives the steering assembly 63 and the clamping jaw assembly 61 and the pipe fitting to rotate upward, and at the same time, the steering assembly 63 rotates to cause the clamping jaw assembly 61 and the pipe fitting to flip over, and turn the pipe fitting to a horizontal state, with the other end of the pipe fitting facing the cutting mechanism 3.

[0028] like Figure 8 and 9 As shown, the following preferred technical solutions are provided: The cutting mechanism 3 includes a cutting unit 31 , a cutting frame 32 and a transfer and fixing assembly 33 . The cutting unit 31 is fixedly mounted on one side of the workbench 4 through the cutting frame 32 . The transfer and fixing assembly 33 is located below the cutting unit 31 and directly opposite to the clamping mechanism 6 .

[0029] The transfer and fixing assembly 33 includes a support plate 331, a clamping cylinder 332 and a transfer cylinder 333. A clamping plate 334 is provided at the end of the clamping cylinder 332. The clamping cylinder 332 is installed on the cutting frame 32 through a movable slide 335. The movable slide 335 is installed on the cutting frame 32 through a transfer slide rail 336. One end of the movable slide 335 passes through the support plate 331 and is provided with a fixing plate 337 at one end away from the clamping cylinder 332. The output end of the transfer cylinder 333 is fixedly connected to the clamping cylinder 332, and the other end of the transfer cylinder 333 is fixedly installed on the cutting frame 32.

[0030] Specifically, in order to solve the technical problem of cutting the parts of the waste pipe fittings that need to be cut, the present invention uses the cooperation of the clamping cylinder 332, the clamping plate 334 and the fixed plate 337 to clamp the pipe fittings clamped by the clamping mechanism 6, and then pushes the clamping cylinder 332, the movable slide 335 and the pipe fittings to the cutting unit 31 for cutting through the moving cylinder, and this method can be used to achieve multi-segment cutting of the pipe fittings. After a section of the pipe fitting is cut, if another section needs to be cut, especially if the pipe fittings that are not completely unblocked require multi-segment cutting, the clamping cylinder 332 and the clamping plate 334 are reset at this time, the pipe fittings are loosened, and the pipe fittings are placed on the support plate 331. The transfer cylinder 333 drives the movable slide 335, the clamping cylinder 332 and the clamping plate 334 to retract, and then the clamping cylinder 332 works again to clamp the pipe fittings, and the transfer cylinder 333 moves the pipe fittings forward.

[0031] like Figures 1 to 11 As shown, the following preferred technical solutions are provided: A processing process of a metal solid waste recycling pretreatment device comprises the following steps: Step 1: The waste pipe fittings are transported one by one along the material trough 14 on the conveying frame 11 to the dredging port 15 through the conveying mechanism 1, and the pipe fittings arranged by the material-dispensing claws 13 are transported in sequence through the driving assembly 12. The driving motor 16 drives the pulley transmission module 17 and the cam assembly 18 to move, thereby driving the connecting plate 19 and the material-dispensing claws 13 to sequentially transfer the vertically arranged pipe fittings to the bottom of the cleaning mechanism 2, thereby realizing automatic feeding of the waste pipe fittings; Step 2: The two dredging arms 23 are pushed by the electric push rod 22 to dredge the pipes at the two dredging openings 15 on the conveying frame 11. The electric push rod 22 pushes the gear seat to move downward, thereby driving the gear 241 and the rack 242 meshing with the gear 241 and the slide 244 to move downward synchronously, and the two dredging arms 23 are extended into the corresponding waste pipes. The dredging arms 23 push out the debris stuck in the pipes. Since the debris stuck in each pipe is different, or there is no debris in some pipes, the dredging arms 23 may be blocked by debris in the pipes when two adjacent pipes are being cleaned. The debris in one of the pipes will hold up the dredging arm 23 and prevent it from moving downward. The other dredging arm 23 will continue to move downward to dredge due to the meshing between the gear 241 and the rack 242, so that the two dredging arms 23 can continue to move and dredge after one of them is blocked; Step 3: The upper end of the pipe is clamped by the clamping jaw assembly 61, and the driving module 62 drives the cam linkage mechanism 64 to move. The cam linkage mechanism 64 drives the steering assembly 63, the clamping jaw assembly 61 and the pipe to rotate upward. At the same time, the steering assembly 63 rotates to turn the clamping jaw assembly 61 and the pipe over, and the pipe is turned to a horizontal state, and the other end of the pipe faces the cutting mechanism 3. Step 4: Use the clamping cylinder 332, the clamping plate 334 and the fixed plate 337 to clamp the pipe clamped by the clamping mechanism 6, and then use the mobile cylinder to push the clamping cylinder 332, the movable slide 335 and the pipe to the cutting unit 31 for cutting, and this method can be used to achieve multi-segment cutting of the pipe. After cutting one section of the pipe, if another section needs to be cut, especially the pipe that is not completely unblocked requires multi-segment cutting, the clamping cylinder 332 and the clamping plate 334 are reset at this time, the pipe is loosened, and the pipe is placed on the support plate 331. The transfer cylinder 333 drives the movable slide 335, the clamping cylinder 332 and the clamping plate 334 to retract, and then the clamping cylinder 332 works again to clamp the pipe, and the transfer cylinder 333 moves the pipe forward.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A pretreatment device for recycling metal solid waste, characterized in that: include: A conveying mechanism (1) for conveying waste pipe fittings, a cleaning mechanism (2) for cleaning the pipe fittings, and a cutting mechanism (3) for cutting the cleaned pipe fittings to be cut. The conveying mechanism (1), the cleaning mechanism (2), and the cutting mechanism (3) are all mounted on a workbench (4). The cleaning mechanism (2) is located above the conveying mechanism (1), and the cutting mechanism (3) is located on one side of the conveying mechanism (1) and the cleaning mechanism (2). A recycling box (5) for storing cleaned debris and garbage is provided below the conveying mechanism (1). A clamping mechanism (6) for clamping and conveying vertical pipe fittings to a horizontal position for cutting is provided between the conveying mechanism (1) and the cutting mechanism (3).

2. A metal solid waste recycling pretreatment device according to claim 1, characterized in that: The conveying mechanism (1) comprises a conveying frame (11), a driving assembly (12) and a material-discharging claw (13); the conveying frame (11) is fixedly mounted on the lower end of a workbench (4); the material-discharging claw (13) is slidably mounted on the conveying frame (11); the driving assembly (12) is mounted on the conveying frame (11) and connected to the material-discharging claw (13); the conveying frame (11) is provided with a material trough (14) for slidingly conveying pipe fittings and a dredging port (15) for cleaning and dredging debris in the pipe fittings; the dredging port (15) is directly opposite to a recovery box (5) below.

3. A metal solid waste recycling pretreatment device according to claim 2, characterized in that: The driving assembly (12) comprises a driving motor (16), a pulley transmission module (17) and a cam group (18); the driving motor (16) is mounted below the conveying frame (11); the cam group (18) is mounted inside the conveying frame (11) and is connected to the driving motor (16) via the pulley transmission module (17); and the cam group (18) is connected to the material removing claw (13) via a connecting plate (19).

4. A metal solid waste recycling pretreatment device according to claim 3, characterized in that: The cleaning mechanism (2) comprises a cleaning frame (21), an electric push rod (22) and two dredging arms (23); the cleaning frame (21) is fixedly mounted on the top of a workbench (4) and extends into the workbench (4) to face the dredging opening (15); the two dredging arms (23) are connected to the electric push rod (22) via a rack-rail connecting assembly (24); the electric push rod (22) is vertically mounted on the top of the cleaning frame (21); the rack-rail connecting assembly (24) is mounted on one side of the lower end of the cleaning frame (21); and the two dredging arms (23) are fixedly mounted on the rack-rail connecting assembly (24).

5. A pretreatment device for recycling metal solid waste according to claim 4, characterized in that: The rack-rail connection assembly (24) comprises a gear (241), two racks (242) and a slide rail module (243); the slide rail module (243) is vertically mounted on the cleaning frame (21); the two racks (242) are respectively fixedly mounted on the slides (244) corresponding to the slide rail modules (243); the gear (241) is meshed with the two racks (242); the gear (241) is connected to the output end of the electric push rod (22) via a gear seat; and the two dredging arms (23) are respectively mounted on the bottom of the slides (244) corresponding to the slide rail modules (243).

6. A metal solid waste recycling pretreatment device according to claim 5, characterized in that: The clamping and conveying mechanism (6) comprises a clamping jaw assembly (61), a driving module (62) and a steering assembly (63); the clamping jaw assembly (61) is mounted on the steering assembly (63); and the steering assembly (63) and the driving module (62) are connected in transmission via a cam connecting rod mechanism (64).

7. The metal solid waste recycling pretreatment device according to claim 6, characterized in that: The cutting mechanism (3) comprises a cutting unit (31), a cutting frame (32) and a transfer fixing assembly (33); the cutting unit (31) is fixedly mounted on one side of a workbench (4) via the cutting frame (32); and the transfer fixing assembly (33) is located below the cutting unit (31) and directly opposite to the clamping mechanism (6).

8. The metal solid waste recycling pretreatment device according to claim 7, characterized in that: The transfer and fixing assembly (33) comprises a support plate (331), a clamping cylinder (332) and a transfer cylinder (333); a clamping plate (334) is provided at the end of the clamping cylinder (332); the clamping cylinder (332) is mounted on the cutting frame (32) via a movable slide (335); the movable slide (335) is mounted on the cutting frame (32) via a transfer slide rail (336); one end of the movable slide (335) passes through the support plate (331) and is provided with a fixing plate (337) at one end away from the clamping cylinder (332); the output end of the transfer cylinder (333) is fixedly connected to the clamping cylinder (332); and the other end of the transfer cylinder (333) is fixedly mounted on the cutting frame (32).

9. The processing technology of the metal solid waste recycling pretreatment device according to claim 8 is characterized in that: The steps include: Step 1: The waste pipe fittings are transported one by one along the material trough (14) on the conveying frame (11) to the dredging port (15) through the conveying mechanism (1), and the pipe fittings arranged by the material-dispensing claws (13) are transported in sequence through the driving assembly (12). The driving motor (16) drives the pulley transmission module (17) and the cam assembly (18) to move, thereby driving the connecting plate (19) and the material-dispensing claws (13) to sequentially transfer the vertically arranged pipe fittings to the bottom of the cleaning mechanism (2), thereby realizing automatic feeding of the waste pipe fittings; Step 2: The electric push rod (22) pushes the two dredging arms (23) to dredge the pipes at the two dredging openings (15) on the conveying frame (11). The electric push rod (22) pushes the gear seat to move downward, thereby driving the gear (241) and the rack (242) meshing with the gear (241) and the slide (244) to move downward synchronously, and the two dredging arms (23) are extended into the corresponding waste pipes. The dredging arms (23) push out the debris stuck in the pipes, and the Due to the different debris stuck in each pipe, or some pipes do not have debris, when two adjacent pipes are being cleaned, the dredging arm (23) may be blocked by debris in the pipes. The debris in one pipe blocks the dredging arm (23) and prevents it from moving downwards, while the other dredging arm (23) continues to move downwards to dredge due to the meshing between the gear (241) and the rack (242), so that the two dredging arms (23) can continue to move to dredge after one of them is blocked. Step 3: The upper end of the pipe is clamped by the clamping jaw assembly (61), and the driving module (62) drives the cam connecting rod mechanism (64) to move. The cam connecting rod mechanism (64) drives the steering assembly (63), the clamping jaw assembly (61) and the pipe to rotate upward. At the same time, the steering assembly (63) rotates to turn the clamping jaw assembly (61) and the pipe over, and the pipe is turned to a horizontal state, with the other end of the pipe facing the cutting mechanism (3). Step 4: The pipe clamped and delivered by the clamping mechanism (6) is clamped by using the clamping cylinder (332), the clamping plate (334) and the fixed plate (337), and then the clamping cylinder (332), the movable slide (335) and the pipe are pushed to the cutting unit (31) for cutting by the moving cylinder. In addition, this method can be used to achieve multi-section cutting of the pipe. After a section of the pipe is cut, if another section needs to be cut, especially if the pipe that is not completely unblocked needs multi-section cutting, the clamping cylinder (332) and the clamping plate (334) are reset, the pipe is loosened, and the pipe is placed on the support plate (331). The transfer cylinder (333) drives the movable slide (335), the clamping cylinder (332) and the clamping plate (334) to retract, and then the clamping cylinder (332) works again to clamp the pipe, and the transfer cylinder (333) moves the pipe forward.

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