A screw press

Abstract

The present invention discloses a screw press, comprising a frame, on which a pressure hammer and a processing table are relatively arranged, and a cleaning mechanism for cleaning the processing table, wherein the cleaning mechanism comprises a scraper plate for performing circular motion on the surface of the processing table to achieve cleaning, and a negative pressure suction mechanism arranged on the scraper plate. The scraper plate arranged in the cleaning mechanism scrapes away the waste materials with a larger volume scattered on the surface of the processing table under the circular motion, and at the same time, during the scraping process, the waste materials with a smaller volume are sucked by the suction mechanism arranged, so as to achieve the cleaning of waste materials with different volumes on the surface of the processing table. Moreover, the negative pressure suction mechanism forms a raised rib on the surface of the scraper plate, and the raised rib plays a role of limiting and guiding the scraped waste materials.

Description

Technical Field

[0001] The invention relates to the technical field of presses, and in particular to a screw press. Background Art

[0002] Screw press is a general term for a pressurizing machine that generates pressure by rotating one or more sets of outer and inner bolts within a frame. When a screw press is processing a workpiece, it is necessary to clean it to ensure the cleanliness of the processing table.

[0003] For example, the Chinese patent document with authorization announcement number CN218425364U, announcement date 2023-02-03, and name "A composite electric screw press" comprises a press body and an inclined plate, a drive box is installed at the upper end of the press body, a screw rod is installed on the lower surface of the drive box, a pressure block is installed at the lower end of the screw rod, the surface of the pressure block is slidably connected to the press body, a pressure plate is installed on the surface of the press body, and a cleaning device is provided on the surface of the pressure plate, the cleaning device comprises two relatively arranged L-shaped plates, and the two L-shaped plates are fixedly connected to the pressure plate on one side. This patent achieves the situation that when some parts fall off part of the material after forging during the forging process, the cleaning device can be used to start the servo motor to drive the mounting frame to move along the surface of the pressure plate after the forging is completed, so that the scraper block can be used to clean the material falling off the surface of the pressure plate.

[0004] In the prior art, when a screw press processes a workpiece, a lot of scrap iron filings will be scattered on its processing table. In order to prevent the scrap iron filings from affecting the processing of the workpiece, it is generally cleaned manually or by an automatic cleaning mechanism. Manual cleaning is time-consuming, labor-intensive and inefficient. The existing automatic cleaning mechanism is often a scraper-type cleaning mechanism. Since the size of the scrap iron filings varies, when cleaning smaller scrap iron filings, especially flat small scrap iron filings, the scraper-type cleaning mechanism cannot scrape and clean them, thereby affecting the cleaning of the processing table. Summary of the invention

[0005] The object of the present invention is to provide a screw press to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A screw press comprises a frame on which a pressure hammer and a processing table are arranged relative to each other, and also comprises a cleaning mechanism for cleaning the processing table. The cleaning mechanism comprises a scraper plate for performing circular motion on the surface of the processing table to achieve cleaning and a negative pressure suction mechanism arranged on the scraper plate.

[0007] In the above-mentioned screw press, the cleaning mechanism is arranged on the frame through a mechanical arm, and the cleaning mechanism also includes a rotating unit, which is used to drive the scraper plate to perform circular motion on the processing table to scrape the waste.

[0008] In the above-mentioned screw press, the rotating unit includes a first motor and a rotating shaft, the first motor is fixed to the robot arm through a fixed disc, and the first motor output shaft is fixed to the rotating shaft, and the outer surface of the rotating shaft is fixed to the scraper plate.

[0009] In the above-mentioned screw press, the bottom end of the rotating shaft abuts against the center of the processing table, and the rotating shaft rotates at the center of the processing table.

[0010] In the above-mentioned screw press, a collecting mechanism is arranged on the scraping plate, and the negative pressure suction mechanism includes multiple groups of suction components, each group of suction components includes a suction device and a suction head, wherein the suction device is arranged on the scraping plate, the suction head is arranged on the suction device, and the suction head is connected to the suction device through a connecting pipe.

[0011] In the above-mentioned screw press, the negative pressure suction mechanism forms raised ribs on the surface of the scraping plate, and the raised ribs play a limiting and guiding role for the scraped waste.

[0012] In the above-mentioned screw press, a collecting mechanism is arranged on the scraping plate, and the collecting mechanism includes a turning unit and a waste box. The turning unit is arranged on the scraping plate, and is used to turn over the waste on the scraping plate so that the waste falls into the waste box for collection.

[0013] In the above-mentioned screw press, the flip unit includes a sliding bracket, the sliding bracket is slidably connected to the fixed disc, and a second motor is fixed to the sliding bracket, the output shaft of the second motor is fixed to the scraper plate, the scraper plate and the rotating shaft are rotatably connected via a rotating shaft, the waste box is fixed to the sliding bracket, and the waste box and the suction device are connected via a hose.

[0014] In the above-mentioned screw press, the gas in the waste box is discharged through the exhaust hole, and a filter is provided on the exhaust hole, and the filter is used to intercept the waste.

[0015] In the above-mentioned screw press, a hanging portion is provided on the top of the sliding bracket, and the sliding bracket is slidably connected to the edge of the fixed disc through the hanging portion.

[0016] In the above technical scheme, the present invention provides a screw press, which scrapes away the larger waste materials scattered on the surface of the processing table through the scraping plate arranged in the cleaning mechanism in a circular motion. At the same time, during the scraping process, the smaller waste materials are sucked up by the suction mechanism arranged, so as to realize the cleaning of waste materials of different volumes on the surface of the processing table. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A structural schematic diagram of a screw press provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a screw press from another perspective provided by an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure of the waste box; Figure 4 for Figure 3 Another perspective structural diagram of the waste box in the middle; Figure 5 for Figure 4 A schematic diagram of the structure of the middle baffle from another perspective; Figure 6 for Figure 4 A local enlarged schematic diagram of the middle A; Figure 7 for Figure 5 A partial enlarged schematic diagram of point B in the middle; Figure 8 for Figure 3 Schematic cross-sectional view of the suction device.

[0019] Description of reference numerals: 1. Frame; 2. Pressure hammer; 3. Processing table; 4. Scraper plate; 5. First motor; 6. Rotating shaft; 7. Robotic arm; 8. Suction device; 9. Suction head; 10. Waste box; 11. Second motor; 12. First cover plate; 13. Second cover plate; 14. Rotating shaft; 17. Sliding bracket; 18. Groove; 19. Baffle; 20. Movable shaft; 21. First elastic member; 22. Inclined surface; 23. Guide surface; 24. Connecting plate; 25. Movable groove; 26. Second elastic member; 27. Extension plate. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-8 As shown, a screw press provided by an embodiment of the present invention includes a frame 1, on which a pressure hammer 2 and a processing table 3 are relatively arranged, and also includes a cleaning mechanism for cleaning the processing table 3, the cleaning mechanism is used for a scraper plate 4 that performs circular motion on the surface of the processing table 3 to achieve cleaning, and a negative pressure suction mechanism arranged on the scraper plate 4.

[0022] Specifically, the frame 1 is a frame-type structure, the frame 1 is fixed on a fixed foundation such as the ground, and a pressure hammer 2 for applying pressure is arranged on the frame 1. The processing table 3 is in the shape of a cylinder, which is also fixed on the fixed foundation. The processing table 3 is arranged below the pressure hammer 2, and the working direction of the pressure hammer 2 is set vertically downward to cooperate with the processing table 3 to achieve pressure processing. This is a prior art and will not be repeated. In this embodiment, the frame 1 is also provided with a cleaning mechanism, and the cleaning mechanism is used to clean the processing table 3. The cleaning mechanism is connected to a mechanical arm 7, and the cleaning mechanism is connected to the frame 1 such as the top through the mechanical arm 7, so that the mechanical arm 7 is used to drive the cleaning mechanism to approach or move away from the processing table 3. The specific mechanical arm 7 is divided into two motion states. When in the non-cleaning state, the mechanical arm 7 drives the cleaning mechanism away from the processing table 3 to ensure that the pressure hammer 2 normally performs pressure processing on the workpiece.

[0023] When in the cleaning state, the robot arm 7 drives the cleaning mechanism to be placed on the processing table 3. Through the operation of the cleaning mechanism, the waste on the processing table 3 is automatically cleaned. At the same time, the robot arm 7 that drives the cleaning mechanism to reciprocate between two positions is also a prior art and will not be described in detail. The cleaning mechanism includes a scraper plate 4 and a negative pressure suction mechanism arranged on the scraper plate 4, wherein the scraper plate 4 is used to make a circular motion on the surface of the processing table 3, that is, one end of the scraper plate 4 is located at the center of the processing table 3, and the other end is located at the edge of the processing table 3 and makes a circular motion to clean the waste scattered on the surface of the processing table 3. In the cleaning state, the scraper plate 4 slides on the processing table 3, and its contact line with the processing table 3 is a line where a radius of the processing table 3 is located, so that the scraper plate 4 scrapes the waste in the process of circular motion with the center of the processing table 3 as the center. At the same time, a certain inclination angle is also set between the scraper plate 4 and the processing table 3 to guide the scraping waste so that the waste gradually moves to the scraper plate 4 by means of the scraping motion. For the convenience of description, the scraping direction of the scraper plate 4 is a first direction, which is perpendicular to the working direction of the pressure hammer 2. At the same time, a negative pressure suction mechanism is arranged on the scraping plate 4. In the cleaning state, the suction port of the negative pressure suction mechanism faces the processing table 3, so that during the circular motion of the cleaning mechanism, the negative pressure suction mechanism can suck smaller-sized waste, especially powdered waste, on the processing table 3, so that the scraping plate 4 can scrape off large-sized waste and the negative pressure suction mechanism can extract small-sized waste.

[0024] The beneficial effects of this embodiment are as follows: the scraper plate 4 provided in the cleaning mechanism scrapes away the waste materials with a larger volume scattered on the surface of the processing table 3 in a circular motion, and during the scraping process, the suction mechanism provided sucks away the waste materials with a smaller volume, so as to achieve the cleaning of waste materials with different volumes on the surface of the processing table 3. Moreover, the negative pressure suction mechanism forms a raised rib on the surface of the scraper plate 4, and the raised rib plays a role in limiting and guiding the scraped waste materials.

[0025] In another embodiment provided by the present invention, in order to achieve the cleaning of waste, this embodiment provides a structure for cleaning waste. Based on this, the cleaning mechanism includes not only a scraper plate 4 and a negative pressure suction mechanism, but also a rotating unit. The rotating unit is used to drive the scraper plate 4 to perform a circular motion on the processing table 3 to scrape the waste. Before entering the cleaning state, the robot arm 7 moves to arrange the rotating unit upright at the center of the processing table 3, so that the rotating unit rotates at the center of the processing table 3 during the rotation process. The rotating unit preferably includes a first motor 5 and a rotating shaft 6. The first motor 5 is fixed to the robot arm 7 through a fixed disc, and the output shaft of the first motor 5 is fixed to the rotating shaft 6. The rotating shaft 6 is fixed to the scraper plate 4. For the convenience of description, the end of the rotating shaft 6 that contacts the center of the processing table 3 is the bottom end. In this way, the bottom end of the rotating shaft 6 abuts against the center of the processing table 3 (a ball can be set at the bottom end of the rotating shaft 6 to adapt to abutment and rotation), and when the first motor 5 is started, the rotating shaft 6 rotates at the center of the processing table 3, so that the scraper plate 4 scrapes the waste on the surface of the processing table 3. The negative pressure suction mechanism includes multiple groups of suction components. In this embodiment, the suction components are preferably three groups, each group of the suction components includes a suction device 8 and a suction head 9. The suction device 8 works in a negative pressure manner, and the suction device 8 and the suction head 9 are connected through a connecting pipe.

[0026] Specifically, the suction device 8 is arranged on the scraper plate 4. When entering the cleaning state, the suction device 8 is used to limit and guide the waste material moving onto the scraper plate 4 to prevent the waste material from being thrown out of the scraper plate 4 during the circular motion of the scraper plate 4. A suction head 9 is arranged on the suction device 8. The suction head 9 is close to the table surface of the processing table 3. When entering the cleaning state, the scraper plate 4 performs a circular motion on the processing table 3 so that the suction head 9 can suck the waste material (smaller size) scattered on the processing table 3. When the pressure hammer 2 finishes processing the workpiece, it is necessary to clean the waste on the processing table 3. Before entering the cleaning state (the first step), the mechanical arm 7 is started to move the mechanical arm 7 to drive the rotating shaft 6 to be arranged vertically at the center of the processing table 3, and then enter the cleaning state (the second step). The first motor 5 is started to rotate the rotating shaft 6 at the center of the processing table 3, driving the scraper plate 4 to perform a circular motion on the processing table 3, so that the scraper plate 4 scrapes the waste on the processing table 3. In this way, the suction device 8 on the scraper plate 4 also performs a circular motion, so that the suction device 8 sucks the waste on the processing table 3 through the suction head 9 during startup, so as to clean the waste on the processing table 3. After the cleaning state is completed (the third step), the mechanical arm 7 is started again to move the mechanical arm 7 to move the rotating shaft 6 away from the center of the processing table 3, so that the pressure hammer 2 can process the workpiece normally.

[0027] In another embodiment provided by the present invention, in order to realize the collection of waste, this embodiment provides a structure for collecting waste, based on which, it also includes a collection mechanism, the collection mechanism includes a flip unit and a waste box 10, the flip unit is arranged on the scraper plate 4, and is used to flip the scraper plate 4 so that the waste on the scraper plate 4 falls into the waste box 10 for collection. When entering the cleaning state, the waste box 10 is used to collect the waste scraped from the scraper plate 4 and the waste sucked by the suction device 8. The suction device 8 transports the waste to the waste box 10 through a hose, and an exhaust hole is arranged inside the waste box 10, and the exhaust hole is used to maintain the balance of the internal air pressure of the waste box 10. When the waste sucked by the suction device 8 is transported to the waste box 10, the gas in the waste box 10 is discharged from the exhaust hole, and a filter is arranged on the exhaust hole, and the filter is used to intercept the waste. In this embodiment, the flip unit preferably includes a sliding bracket 17, a hanging portion is provided on the top of the sliding bracket 17, and the end of the scraper plate 4 away from the rotating shaft 6 is finally hung and supported by the sliding bracket 17, and the sliding bracket 17 is slidably connected to the edge of the fixed disc through the hanging portion. When entering the cleaning state, the circular motion of the scraper plate 4 is used to make the sliding bracket 17 slide in a circular motion on the fixed disc to improve the stability of the scraper plate 4 during the circular motion. In terms of specific structure, the bottom of the sliding bracket 17 is fixedly connected to the second motor 11, and the output shaft of the second motor 11 is fixedly connected to the On the scraper plate 4, the scraper plate 4 and the rotating shaft 6 are rotatably connected via a rotating shaft, the waste box 10 is fixed to the sliding bracket 17, and the other end of the waste box 10 can be suspended in the air or slidably hung on the annular slide rail on the lower surface of the fixed disc through a hanging mechanism, and the waste box 10 is connected to the suction device 8 through a hose (not shown in the figure). In this embodiment, one end of the hose is connected to the discharge port of the suction device 8, and the other end thereof is connected to the inside of the waste box 10, wherein the hose is made of rubber to adapt to the stretching of the hose by the scraper plate 4 during the flipping process to prevent damage to the hose.

[0028] Specifically, in the cleaning state, during the waste collection process, the suction device 8 is started, so that the waste sucked by the suction head 9 is transported to the waste box 10 for collection through the hose connected to the discharge port. After the cleaning state is over, during the waste collection process, the second motor 11 is started to rotate the output shaft of the second motor 11, driving the scraper plate 4 to flip over, flipping the waste on the scraper plate 4, and under the action of gravity, the cover of the waste box 10 is opened at the same time, so that the waste falls into the waste box 10 for collection, so as to realize the collection of the waste on the scraper plate 4, and then realize the centralized collection of the waste scraped from the scraper plate 4 and the waste on the processing table 3 that is not scraped by the scraper plate 4.

[0029] For further information, see Figure 4-Figure 7 In order to collect waste, this embodiment provides a structure for collecting waste. Based on this, the collection mechanism includes a sealing unit and a limiting unit. The sealing unit is used to seal the waste box 10, and the sealing unit includes a first cover plate 12 and a second cover plate 13. The first cover plate 12 and the second cover plate 13 are symmetrically covered in the top opening of the waste box 10, wherein the first cover plate 12 is rotatably connected to the waste box 10 through a rotating shaft 14, and a torsion spring is sleeved on the rotating shaft 14 so that the initial position of the first cover plate 12 is a horizontal position, that is, a normalized closed position. In the above description, the second cover plate 13 is also arranged in the same manner. Specifically, the first cover plate 12 and the second cover plate 13 are arranged in position, that is, the second cover plate 13 is close to the scraper plate 4, and the first cover plate 12 is opposite. In this embodiment, the limiting unit is arranged on the scraper plate 4, and the limiting mechanism preferably includes a groove 18, a baffle 19, a movable shaft 20 and a first elastic member 21. Specifically, the groove 18 is a U-shaped groove opened at the end of the scraping plate 4 away from the scraping end, and the opening position of the groove 18 is rotatably connected to a movable shaft 20, and a baffle 19 is fixed to the movable shaft 20. The baffle 19 is arranged in the opening area of ​​the groove 18 so that the groove 18 becomes a waste accumulation and collection area. The baffle 19 is used to limit the waste on the scraping plate 4, and the baffle 19 and the scraping plate 4 are arranged perpendicular to each other. The first elastic member 21 is sleeved on the outer surface of the movable shaft 20, and one end of the first elastic member 21 is fixed to the scraping plate 4. , the other end is fixedly connected to the inside of the groove 18, and the first elastic member 21 is preferably a torsion spring. In the initial state, the baffle 19 and the scraper plate 4 are perpendicular to each other, and the bottom of the baffle 19 protrudes from the bottom surface of the scraper plate 4, and preferably the bottom of the baffle 19 is provided with an inclined surface 22. In the latter part of the flipping stroke of the scraper plate 4, the inclined surface 22 is used to contact and push the first cover plate 12 to rotate the first cover plate 12. The U-shaped bottom surface of the groove 18 on the scraper plate 4 is a guide surface 23, and the guide surface 23 is used to guide and concentrate the waste.

[0030] In this embodiment, the baffle 19 has two working states: In the first working state, the angle between the baffle plate 19 and the scraper plate 4 is 90 degrees; In the second working state, the baffle 19 and the scraper plate 4 rotate relative to each other, such as the angle between the two is 60 degrees. Specifically, after the cleaning state is completed, the scraper plate 4 is flipped over, and the two ends of the scraper plate 4 are turned upside down, that is, the bottom end originally used for scraping rises to a high position, and the end originally located at a high position with the baffle 19 rotates to a low position. Correspondingly, the waste moves from one end to the other end with the baffle 19 under the action of gravity. The baffle 19 is used to scrape The scraper plate 4 is limited by the waste on the scraper plate 4, specifically by starting the second motor 11, so that the output shaft of the second motor 11 rotates, driving the scraper plate 4 to flip, and the waste on the scraper plate 4 moves with the flipping and is collected on the guide surface 23, so as to avoid the waste falling on the first cover plate 12 and the second cover plate 13 during the flipping of the scraper plate 4, so as to achieve the limitation of the waste during the flipping process; in the second half of the flipping process of the scraper plate 4, the baffle 19 is used to discharge the waste flipped on the scraper plate 4.

[0031] The latter half of the specific flipping process of the scraper plate 4 is divided into five steps. In the first step, as the scraper plate 4 continues to flip, the inclined surface 22 at the bottom of the baffle plate 19 contacts the first cover plate 12 and squeezes it, so that the first cover plate 12 flips first. At the same time, the reaction force generated during the squeezing process drives the baffle plate 19 to rotate relative to the scraper plate 4, so that one side of the guide surface 23 is separated from the baffle plate 19, that is, a certain gap is generated, and under the action of gravity, the waste falls in the flipping direction of the first cover plate 12 (that is, the opening between the first cover plate 12 and the second cover plate 13); in the second step, as the scraper plate 4 continues to flip, that is, the end of the scraper plate 4 away from the scraping end flips and squeezes the surface of the second cover plate 13, so that the second cover plate 13 flips, and at this time, the first cover plate and the second cover plate are both turned to The waste box 10 is deflected; the third step, during the continuation of the first and second steps, the openings of the first cover plate 12 and the second cover plate 13 are V-shaped and gradually enlarged, and under the action of gravity, the waste falling at the openings of the first cover plate 12 and the second cover plate 13 falls into the waste box 10 for collection; the fourth step, as the scraper plate 4 continues to flip and enters the waste box 10, the openings of the first cover plate 12 and the second cover plate 13 are further enlarged, and the waste collected in the waste box 10 is squeezed and compressed to change the volume of the waste to facilitate the entry of new waste; the fifth step, after squeezing and compression, the scraper plate 4 is reversed and flipped, so that the baffle 19 and the scraper plate 4 lose the squeezing of the first cover plate 12 and the second cover plate 13, and the baffle 19 and other results are restored to the initial state.

[0032] For further information, see Figure 8As shown, in order to facilitate the lifting and collection of waste, this embodiment provides a structure for lifting the waste first and then collecting it. Based on this, the scraper plate 4 is provided with a lifting mechanism, which includes a connecting plate 24, which is fixedly connected to the bottom surface of the scraper plate 4, and a movable groove 25 is provided in the connecting plate 24. A second elastic member 26 is fixedly connected inside the movable groove 25, and an extension plate 27 is fixedly connected to the second elastic member 26. The extension plate 27 is used to increase the length of the scraper plate 4. After the cleaning state is completed, the waste is lifted and collected during the waste collection process. Among them, the second elastic member 26 is preferably an extrusion spring, and its initial state is a compressed state. In this way, the extension plate 27 is squeezed into the movable groove 25 for storage. When the scraper plate 4 is turned over, the extension plate 27 gradually loses the extrusion on the processing table 3. With the help of the rebound of the second elastic member 26, the extension plate 27 is ejected from the movable groove 25, so as to indirectly increase the length of the scraper plate 4, so as to facilitate the lifting and flipping of the waste. The direction in which the extension plate 27 pops out is consistent with the opening direction of the movable groove 25. After the cleaning state is completed, during the waste collection process, the scraper plate 4 is turned over and slowly separated from the processing table 3, so that the extension plate 27 is pushed out of the movable groove 25 by the rebound of the second elastic member 26, and the waste attached to the scraper plate 4 is lifted up. After that, the scraper plate 4 is turned over to concentrate the waste, so as to avoid the scraper plate 4 being unable to lift up the waste, thereby leaving it on the surface of the processing table 3, thereby affecting the waste collection, so as to achieve the collection of the waste.

[0033] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A screw press, comprising a frame and a processing table, wherein a pressure hammer is arranged on the frame, and further comprising a cleaning mechanism for cleaning the processing table, characterized in that: The cleaning mechanism comprises a scraper plate used for performing circular motion on the surface of the processing table to achieve cleaning, and a negative pressure suction mechanism arranged on the scraper plate.

2. A screw press according to claim 1, characterized in that: The cleaning mechanism is arranged on the frame through a mechanical arm, and the cleaning mechanism also includes a rotating unit, which is used to drive the scraping plate to perform circular motion on the processing table to scrape the waste.

3. A screw press according to claim 2, characterized in that: The rotating unit comprises a first motor and a rotating shaft. The first motor is fixedly connected to the robot arm via a fixed disc, and the output shaft of the first motor is fixedly connected to the rotating shaft. The outer surface of the rotating shaft is fixedly connected to the scraper plate.

4. A screw press according to claim 3, characterized in that: The bottom end of the rotating shaft is in contact with the center of the processing table, and the rotating shaft rotates at the center of the processing table.

5. A screw press according to claim 4, characterized in that: The negative pressure suction mechanism includes multiple groups of suction components, each group of suction components includes a suction device and a suction head, wherein the suction device is arranged on the scraper plate, the suction head is arranged on the suction device, and the suction head is connected to the suction device through a connecting pipe.

6. A screw press according to claim 5, characterized in that: The negative pressure suction mechanism forms a raised rib on the surface of the scraper plate, and the raised rib plays a limiting and guiding role for the scraped waste.

7. A screw press according to claim 6, characterized in that: The scraper plate is provided with a collecting mechanism, which includes a turning unit and a waste box. The turning unit is provided on the scraper plate and is used to turn over the waste on the scraper plate so that the waste falls into the waste box for collection.

8. A screw press according to claim 7, characterized in that: The flipping unit includes a sliding bracket, which is slidably connected to a fixed disc, and a second motor is fixedly connected to the sliding bracket, and an output shaft of the second motor is fixedly connected to the scraper plate, and the scraper plate and the rotating shaft are rotatably connected via a rotating shaft, the waste box is fixedly connected to the sliding bracket, and the waste box and the suction device are connected via a hose.

9. A screw press according to claim 8, characterized in that: The gas in the waste box is discharged through the exhaust hole, and a filter is arranged on the exhaust hole, and the filter is used to intercept the waste.

10. A screw press according to claim 9, characterized in that: A hanging portion is arranged on the top of the sliding bracket, and the sliding bracket is slidably connected to the edge of the fixed disc through the hanging portion.

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