Stirring machine

Abstract

The invention relates to a stirring machine, and relates to the technical field of stirring equipment, the stirring machine comprises a shell, the upper end of the shell is provided with a feed port, the shell is internally provided with a stirring mechanism, the lower end of the shell is provided with a liquid discharge port and a waste discharge port, and the liquid discharge port and the waste discharge port are respectively provided with a sealing assembly. The method has the effects that the zinc resource is conveniently extracted from the zinc slag, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of stirring equipment, and in particular to a stirring machine. Background Art

[0002] Hot-dip galvanizing, also known as hot-dip galvanizing and hot-dip galvanizing, is the process of immersing the rusted steel parts in molten zinc liquid at about 500°C to adhere a zinc layer to the surface of the steel components, thereby achieving the purpose of corrosion protection. It is an effective metal corrosion protection method and is mainly used in metal structural facilities in various industries.

[0003] During the hot-dip galvanizing process, about 20% of the metal zinc forms zinc ash. During the galvanizing process of steel plates, the hot-dip galvanizing production line of steel plants will inevitably produce a large amount of hot-dip galvanizing slag, which is a solid hazardous waste with a zinc content of ≥90%. The main impurities are Al and Fe, and almost no other impurities such as Pb and Cd. If the zinc ash with high zinc content and large total amount cannot be well recycled, it will cause a great waste of zinc resources. Therefore, with the decline of primary zinc ore reserves and the continuous growth of zinc consumption, it is of great significance to realize the regeneration of zinc resources and their sustainable utilization.

[0004] In the zinc slag regeneration process, other resources are usually required for processing in order to extract zinc resources, thus increasing costs. Summary of the invention

[0005] The purpose of this application is to provide a mixer for conveniently extracting zinc resources from zinc slag and reducing costs.

[0006] The present application provides a mixer adopting the following technical solution: A mixer comprises a shell, wherein the upper end of the shell is provided with a feed port, a stirring mechanism is arranged inside the shell, a liquid discharge port and a waste discharge port are arranged at the lower end of the shell, and a sealing component is arranged at the liquid discharge port and the waste discharge port.

[0007] By adopting the above technical scheme, zinc slag in a high-temperature state enters the shell from the feed port, and the stirring mechanism stirs the zinc slag in the shell. The iron, aluminum and other substances in the zinc slag burn at a high temperature, so that the zinc in the zinc slag melts into a zinc solution and sinks to the bottom of the shell. Then, the drain port is opened to allow the zinc solution to separate from the shell and be collected. When only waste slag is left in the shell, the waste discharge port is opened and the waste slag is discharged from the waste discharge port, thereby facilitating the extraction of zinc resources and reducing the extraction cost.

[0008] Optionally, the stirring mechanism includes a rotating shaft rotatably connected to the top of the shell, a connecting rod is provided at one end of the rotating shaft located inside the shell, a plurality of stirring rods are provided at one end of the connecting rod away from the rotating shaft, a disturbance assembly is provided on the stirring rod, and a driving assembly for driving the stirring rod to rotate is provided on the connecting rod.

[0009] By adopting the above technical solution, the rotating shaft rotates, driving the connecting rod to rotate, and the connecting rod drives all the stirring rods to rotate. The stirring rods stir the zinc slag inside the shell, so that each part of the zinc slag is in contact with the air, and then the flammable part of the zinc slag is combined with the air to burn. In order to fully stir the zinc slag, the driving component drives the stirring rod to rotate, so that the disturbance component further stirs the zinc slag, improves the efficiency of the combination of the zinc slag and the air, and then achieves the effect of full combustion.

[0010] Optionally, the disturbance component includes a stirring blade arranged on the end of the stirring rod away from the connecting rod, wherein one of the stirring rods is arranged coaxially with the rotating shaft, one end of the stirring rod coaxial with the rotating shaft is fixedly connected to the connecting rod, and the other end is provided with a scraper, which abuts against the bottom wall inside the shell.

[0011] By adopting the above technical solution, the stirring blades rotate with the stirring rod to stir the zinc slag at the bottom of the zinc slag. When the bottom of the shell is the zinc solution that sinks after combustion, the stirring blades stir the zinc solution so that the zinc slag will not be deposited at the bottom of the shell, thereby facilitating the discharge of the zinc solution and reducing impurities in the zinc solution. In addition, the scraper can scrape the bottom wall of the shell during rotation, thereby accelerating the discharge of the zinc solution and the subsequent discharge of the zinc slag.

[0012] Optionally, a spiral blade is abutted on the outer side wall of the stirring rod, and the spiral blade is fixedly connected to the connecting rod.

[0013] By adopting the above technical solution, the spiral blade is fixed to the connecting rod. When the stirring rod rotates, the spiral blade can scrape and clean the surface of the stirring rod. At the same time, the scraped material slides down along the surface of the spiral blade, thereby improving the cleanliness of the stirring mechanism.

[0014] Optionally, the driving assembly includes a driving rod disposed in the rotating shaft and coaxial with the rotating shaft, the driving rod is fixedly connected to the shell, and a driving gear is provided at one end of the driving rod located in the connecting rod, and the driving gear is connected to the stirring rods at other positions on the connecting rod through a gear set.

[0015] By adopting the above technical solution, when the connecting rod rotates, the driving rod and the housing remain stationary, and the driving rod drives the stirring rod to rotate through the driving gear and the gear set.

[0016] Optionally, an aeration hood is provided at one end of the stirring rod away from the connecting rod, a through hole connected to the aeration hood is provided inside the stirring rod, a bidirectional screw coaxial with the stirring rod is provided in the through hole, the bidirectional screw is fixedly connected to the connecting rod, a movable block for blocking the through hole is threadedly connected to the bidirectional screw, the movable block is only slidably connected to the through hole along the centerline direction of the through hole, and an air hole connecting the through hole and the outside is also provided on the stirring rod, and the movable block can block the air hole.

[0017] By adopting the above technical solution, when the stirring rod rotates, the bidirectional lead screw remains stationary relative to the connecting rod, and the stirring rod drives the moving block to rotate, and the moving block reciprocates along the bidirectional lead screw. In this process, when the moving block passes through the air hole and moves toward the aeration hood, the moving block compresses the air in the through hole, and the air rushes out of the aeration hood to aerate the zinc solution or zinc slag. When the moving block passes through the air hole and moves toward the connecting rod, the outside air enters the through hole through the air hole, and the aeration effect is achieved in this reciprocating manner.

[0018] Optionally, the closing component includes a sealing plate hinged on the shell, the sealing plate is also provided with a first clamping block, the shell is provided with a second clamping block adjacent to the first clamping block, a clamping rod is passed between the first clamping block and the second clamping block, a vibration rod is provided on the side of the sealing plate away from the interior of the shell, the end of the vibration rod away from the shell faces the lower side of the shell, and a vibration spring is further provided between the vibration rod and the shell, and when the sealing plate is opened, the vibration rod impacts the lower side of the shell and vibrates repeatedly through the vibration spring.

[0019] By adopting the above technical solution, when the sealing plate is closed, the first clamping block and the second clamping block are arranged opposite to each other, and the clamping rod passes through the first clamping block and the second clamping block at this time, so that the sealing plate cannot be opened, and after the clamping rod is separated from the first clamping block and the second clamping block, the sealing plate is flipped open, and the sealing plate drives the vibration rod to move, and the end of the vibration rod away from the sealing plate knocks the bottom of the shell, and at the same time, the vibration spring supports the vibration rod, so that the vibration rod can knock the shell multiple times, thereby quickly discharging the zinc solution or waste residue inside the shell.

[0020] Optionally, the lower side surface inside the shell gradually slopes downward from the middle to the surrounding areas.

[0021] By adopting the above technical solution, the setting of the bottom of the shell being high in the middle and low around can facilitate the outflow of substances inside the shell, thereby improving the discharge efficiency.

[0022] Optionally, a sealing cover covering the feed port is provided at the feed port, a limiting block supporting the sealing cover is provided on the inner side wall of the feed port, and a clamping handle that can be clamped on the side wall of the feed port is also provided on the sealing cover.

[0023] By adopting the above technical solution, the cover is placed at the feed inlet and supported by the limit block. When the material needs to be filled, the cover is removed by the handle, so that the material can be filled quickly and the splashing of the material inside the shell can be prevented, thereby improving production safety.

[0024] Optionally, a driving block is inserted into the side wall of the feed port, one end of the driving block is located inside the side wall of the feed port, and a wedge block is provided. A support block is abutted on the inclined surface of the wedge block, and a baffle is provided on the support block. The baffle includes a first baffle, a second baffle and a third baffle hinged in sequence, and a torsion spring is provided at the hinge, and the support block is fixedly connected to the first baffle.

[0025] By adopting the above technical solution, when the cover is removed and connected to the side wall of the feed port by means of the handle, the cover squeezes the driving block at the same time, the driving block squeezes the wedge block, the wedge block pushes the support block to rise, driving the first baffle, the second baffle and the third baffle to rise until the second baffle and the third baffle pass through the upper side wall of the feed port and bend toward the outside of the feed port under the action of the torsion spring, thereby expanding the range of the feed port and reducing the possibility of material spillage when filling the material.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The stirring mechanism stirs the zinc slag inside the shell, and the iron, aluminum and other substances inside the zinc slag burn under high temperature, so that the zinc in the zinc slag melts into zinc solution and sinks to the bottom of the shell. Then the drain port is opened to allow the zinc solution to separate from the shell and be collected. When only waste slag is left in the shell, the waste discharge port is opened and the waste slag is discharged from the waste discharge port, thereby facilitating the extraction of zinc resources and reducing the extraction cost; 2. When the connecting rod rotates, the driving rod of the driving assembly remains relatively stationary with the shell, and the driving rod drives the stirring rod to rotate through the driving gear and the gear set, thereby further improving the stirring effect without additional use, and the stirring efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a schematic structural diagram of a feed port in an embodiment of the present application; Figure 3 It is a schematic diagram of the internal structure of an embodiment of the present application; Figure 4 is a schematic structural diagram of a blocking component according to an embodiment of the present application; In the figure, 1, housing; 11, feed port; 12, cover; 121, snap-on handle; 13, limit block; 14, drive block; 15, support block; 151, rectangular frame; 152, first baffle; 153, second baffle; 154, third baffle; 16, liquid discharge port; 17, waste discharge port; 2, stirring mechanism; 21, rotating shaft; 22, drive motor; 23, connecting rod; 24, stirring rod; 241, through hole; 242, air hole; 25, spiral blade; 3, disturbance component; 31, stirring blade; 32, scraper; 4, drive component; 41, drive rod; 42, drive gear; 43, driven gear; 5, aeration hood; 51, bidirectional screw; 52, moving block; 6, closing component; 61, blocking plate; 62, first clamping block; 63, second clamping block; 64, clamping rod; 65, vibration rod; 66, vibration spring. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0029] Embodiment: A mixer, referring to Figure 1 and Figure 2 , including a shell 1, a feed port 11 is opened on one side of the upper end of the shell 1, a cover 12 for covering the feed port 11 is provided at the feed port 11, a limit block 13 is installed on the inner wall of the feed port 11, when the cover 12 covers the feed port 11, the limit block 13 is below the cover 12 and supports the cover 12, and a clamping handle 121 is fixed on the cover 12, and the clamping handle 121 is set to a wave shape, so that the clamping handle 121 can be clamped on the side wall of the feed port 11, thereby keeping the cover 12 in a vertical state.

[0030] The cover 12 is placed at the feed port 11 and supported by the limit block 13. When the material needs to be filled, the cover 12 can be removed by the handle to quickly complete the filling of the material and prevent the splashing of the material inside the shell 1, thereby improving the safety of production.

[0031] A driving block 14 is inserted into the inner wall of the feed port 11, one end of the driving block 14 is located inside the side wall of the feed port 11, and a wedge is fixed thereon. A support block 15 is abutted on the inclined surface of the wedge, and a rectangular frame 151 is fixed on the support block 15. Except for one side where the support block 15 is located, baffles are arranged on the other three sides of the rectangular frame 151. The baffles include a first baffle 152, a second baffle 153 and a third baffle 154 which are hinged in sequence, and a torsion spring is installed at the hinge. The rectangular frame 151 is fixedly connected to the first baffle 152.

[0032] When the cover 12 is removed and connected to the side wall of the feed port 11 by the handle, the cover 12 squeezes the driving block 14 at the same time, the driving block 14 squeezes the wedge block, the wedge block pushes the support block 15 to rise, and the rectangular frame 151 drives the first baffle 152, the second baffle 153 and the third baffle 154 to rise until the second baffle 153 and the third baffle 154 pass through the upper side wall of the feed port 11 and bend toward the outside of the feed port 11 under the action of the torsion spring, thereby expanding the range of the feed port 11 and reducing the possibility of material spillage when filling.

[0033] Reference Figure 1 and Figure 3 A stirring mechanism 2 is provided in the shell 1, and a liquid discharge port 16 and a waste discharge port 17 are provided at the lower end of the shell 1, and a sealing component 6 is provided at the liquid discharge port 16 and the waste discharge port 17. The high-temperature zinc slag enters the shell 1 from the feed port 11, and the stirring mechanism 2 stirs the zinc slag inside the shell 1. The iron, aluminum and other substances inside the zinc slag burn at a high temperature, so that the zinc in the zinc slag melts into a zinc solution and sinks to the bottom of the shell 1. Then, the liquid discharge port 16 is opened, so that the zinc solution is separated from the shell 1 and collected. When only waste slag is left in the shell 1, the waste discharge port 17 is opened, and the waste slag is discharged from the waste discharge port 17, thereby facilitating the extraction of zinc resources and reducing the extraction cost.

[0034] The stirring mechanism 2 includes a rotating shaft 21 rotatably connected to the top of the housing 1, a driving motor 22 is installed on the upper side of the housing 1, the driving motor 22 is connected to a reducer, and the output shaft of the reducer is connected to the end of the rotating shaft 21 located outside the housing 1 through a bevel gear. A connecting rod 23 is fixed to one end of the rotating shaft 21 located inside the housing 1, and three stirring rods 24 are installed on the side of the connecting rod 23 away from the rotating shaft 21, and a disturbance component 3 is provided on the stirring rod 24, and a driving component 4 for driving the stirring rod 24 to rotate is provided on the connecting rod 23.

[0035] The rotating shaft 21 rotates, driving the connecting rod 23 to rotate, and the connecting rod 23 drives all the stirring rods 24 to rotate. The stirring rods 24 stir the zinc slag inside the shell 1, so that each part of the zinc slag is in contact with the air, and then the flammable part of the zinc slag is combined with the air to burn. In order to fully stir the zinc slag, the driving component 4 drives the stirring rod 24 to rotate, so that the disturbance component 3 further stirs the zinc slag, improves the efficiency of the combination of the zinc slag and the air, and then achieves the effect of full combustion.

[0036] One of the stirring rods 24 is coaxially arranged with the rotating shaft 21, one end of the stirring rod 24 coaxially arranged with the rotating shaft 21 is fixedly connected to the connecting rod 23, and the other end is fixedly connected to a scraper 32, the scraper 32 is in contact with the bottom wall inside the shell 1, and the bottom wall inside the shell 1 gradually slopes downward from the middle to the surroundings. The setting of the bottom of the shell 1 being high in the middle and low around can facilitate the outflow of the material inside the shell 1, thereby improving the discharge efficiency.

[0037] The disturbance component 3 includes a stirring blade 31 arranged on the other two stirring rods 24 at one end away from the connecting rod 23. The stirring blade 31 rotates with the stirring rod 24 to stir the zinc slag at the bottom of the zinc slag. When the bottom of the shell 1 is the zinc solution that sinks after combustion, the stirring blade 31 stirs the zinc solution so that the zinc slag will not be deposited at the bottom of the shell 1, thereby facilitating the discharge of the zinc solution and reducing impurities in the zinc solution. In addition, the scraper 32 can scrape the bottom wall of the shell 1 during the rotation process, thereby accelerating the discharge of the zinc solution and the subsequent discharge of the zinc slag.

[0038] A spiral blade 25 is also abutted on the outer wall of the stirring rod 24, and the spiral blade 25 is fixedly connected to the connecting rod 23. The spiral blade 25 is fixed to the connecting rod 23. When the stirring rod 24 rotates, the spiral blade 25 can scrape and clean the surface of the stirring rod 24. At the same time, the scraped material slides down along the surface of the spiral blade 25, thereby improving the cleanliness of the stirring mechanism 2.

[0039] The driving assembly 4 includes a driving rod 41 disposed in the rotating shaft 21 and coaxial with the rotating shaft 21, the driving rod 41 is fixedly connected to the housing 1, one end of the driving rod 41 located in the connecting rod 23 is fixed with a coaxial driving gear 42, and the stirring rods 24 at both ends of the connecting rod 23 are fixedly connected with driven gears 43 meshing with the driving gear 42, and the driving gear 42 drives the other two stirring rods 24 on the connecting rod 23 to rotate through the driven gear 43. Therefore, when the connecting rod 23 rotates, the driving rod 41 and the housing 1 remain stationary, and the driving rod 41 rotates through the driving gear 42 and the driving stirring rod 24.

[0040] An aeration hood 5 is installed at one end of the stirring rod 24 away from the connecting rod 23. A through hole 241 connecting to the aeration hood 5 is provided inside the stirring rod 24. A bidirectional lead screw 51 coaxial with the stirring rod 24 is provided in the through hole 241. The bidirectional lead screw 51 is fixedly connected to the connecting rod 23. A moving block 52 for blocking the through hole 241 is threadedly connected to the bidirectional lead screw 51. The moving block 52 is only slidably connected to the through hole 241 along the center line direction of the through hole 241. The stirring rod 24 is also provided with an air hole 242 connecting the through hole 241 and the outside world, and the moving block 52 can block the air hole 242.

[0041] When the stirring rod 24 rotates, the bidirectional lead screw 51 remains stationary relative to the connecting rod 23, and the stirring rod 24 drives the moving block 52 to rotate. The moving block 52 reciprocates along the bidirectional lead screw 51. During this process, when the moving block 52 passes through the air hole 242 and moves toward the aeration hood 5, the moving block 52 compresses the air in the through hole 241, and the air rushes out of the aeration hood 5 to aerate the zinc solution or zinc slag. When the moving block 52 passes through the air hole 242 and moves toward the connecting rod 23, the outside air enters the through hole 241 through the air hole 242, and the aeration effect is achieved in this reciprocating manner.

[0042] Reference Figure 1 and Figure 4 The closing component 6 includes a sealing plate 61 hinged on the shell 1, and a first clamping block 62 is fixedly connected to the sealing plate 61. A second clamping block 63 adjacent to the first clamping block 62 is fixedly connected to the shell 1, and a clamping rod 64 is passed between the first clamping block 62 and the second clamping block 63. A vibration rod 65 is provided on the side of the sealing plate 61 away from the inside of the shell 1, and one end of the vibration rod 65 away from the shell 1 faces the lower side of the shell 1. A vibration spring 66 is also provided between the vibration rod 65 and the shell 1. When the sealing plate 61 is opened, the vibration rod 65 impacts the lower side of the shell 1 and vibrates repeatedly through the vibration spring 66.

[0043] When the blocking plate 61 is closed, the first clamping block 62 and the second clamping block 63 are arranged opposite to each other. At this time, the clamping rod 64 passes through the first clamping block 62 and the second clamping block 63, so that the blocking plate 61 cannot be opened. After the clamping rod 64 is separated from the first clamping block 62 and the second clamping block 63, the blocking plate 61 is flipped open, and the blocking plate 61 drives the vibration rod 65 to move. The end of the vibration rod 65 away from the blocking plate 61 knocks on the bottom of the shell 1. At the same time, the vibration spring 66 supports the vibration rod 65, so that the vibration rod 65 can knock on the shell 1 multiple times, thereby quickly discharging the zinc solution or waste residue inside the shell 1.

[0044] The implementation principle of the embodiment of the present application is: open the cover 12 and clamp the cover 12 on the side wall of the feed port 11. At this time, the baffle rises to expand the feed port 11, and the zinc slag enters the shell 1 from the feed port 11. The driving motor 22 drives the connecting rod 23 to rotate, and the stirring rod 24 rotates at the same time, and the disturbance component 3 stirs the zinc slag. During this process, the moving block 52 reciprocates on the bidirectional screw 51, so that the air in the through hole 241 is squeezed out from the aeration hood 5, thereby further disturbing the zinc slag and improving efficiency.

[0045] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mixer, comprising a housing (1), characterized in that: The upper end of the shell (1) is provided with a feed port (11), a stirring mechanism (2) is provided inside the shell (1), a liquid discharge port (16) and a waste discharge port (17) are provided at the lower end of the shell (1), and a sealing component (6) is provided at both the liquid discharge port (16) and the waste discharge port (17).

2. A mixer according to claim 1, characterized in that: The stirring mechanism (2) comprises a rotating shaft (21) rotatably connected to the top end of the shell (1); one end of the rotating shaft (21) located inside the shell (1) is provided with a connecting rod (23); one end of the connecting rod (23) away from the rotating shaft (21) is provided with a plurality of stirring rods (24); a disturbance assembly (3) is provided on the stirring rod (24); and a driving assembly (4) for driving the stirring rod (24) to rotate is provided on the connecting rod (23).

3. A mixer according to claim 2, characterized in that: The disturbance assembly (3) comprises a stirring blade (31) arranged on one end of the stirring rod (24) away from the connecting rod (23), wherein one stirring rod (24) is arranged coaxially with the rotating shaft (21), one end of the stirring rod (24) coaxial with the rotating shaft (21) is fixedly connected to the connecting rod (23), and the other end is provided with a scraper (32), and the scraper (32) abuts against the bottom wall inside the shell (1).

4. A mixer according to claim 3, characterized in that: A spiral blade (25) is also abutted against the outer wall of the stirring rod (24), and the spiral blade (25) is fixedly connected to the connecting rod (23).

5. A mixer according to claim 2, characterized in that: The driving assembly (4) comprises a driving rod (41) which is arranged inside the rotating shaft (21) and is coaxial with the rotating shaft (21); the driving rod (41) is fixedly connected to the housing (1); one end of the driving rod (41) located inside the connecting rod (23) is provided with a driving gear (42); the driving gear (42) is connected to the stirring rods (24) at other positions on the connecting rod (23) via a gear set.

6. A mixer according to claim 5, characterized in that: An aeration hood (5) is provided at one end of the stirring rod (24) away from the connecting rod (23); a through hole (241) communicating with the aeration hood (5) is provided inside the stirring rod (24); a bidirectional lead screw (51) coaxial with the stirring rod (24) is provided inside the through hole (241); the bidirectional lead screw (51) is fixedly connected to the connecting rod (23); a moving block (52) for blocking the through hole (241) is threadedly connected to the bidirectional lead screw (51); the moving block (52) is slidably connected to the through hole (241) only along the centerline direction of the through hole (241); the stirring rod (24) is also provided with an air hole (242) communicating with the through hole (241) and the outside; the moving block (52) can block the air hole (242).

7. A mixer according to claim 1, characterized in that: The sealing component (6) comprises a blocking plate (61) hinged on the shell (1); a first clamping block (62) is further provided on the blocking plate (61); a second clamping block (63) adjacent to the first clamping block (62) is provided on the shell (1); a clamping rod (64) is passed between the first clamping block (62) and the second clamping block (63); a vibration rod (65) is provided on a side of the blocking plate (61) away from the inside of the shell (1); an end of the vibration rod (65) away from the shell (1) faces the lower side of the shell (1); a vibration spring (66) is further provided between the vibration rod (65) and the shell (1); when the blocking plate (61) is opened, the vibration rod (65) impacts the lower side of the shell (1) and repeatedly vibrates through the vibration spring (66).

8. A mixer according to claim 7, characterized in that: The inner lower side surface of the shell (1) gradually slopes downward from the middle to the surrounding areas.

9. A mixer according to claim 1, characterized in that: The feed inlet (11) is provided with a sealing cover (12) which covers the feed inlet (11), an inner side wall of the feed inlet (11) is provided with a limit block (13) which supports the sealing cover (12), and the sealing cover (12) is also provided with a clamping handle (121) which can be clamped on the side wall of the feed inlet (11).

10. A mixer according to claim 9, characterized in that: A driving block (14) is inserted into the side wall of the feed port (11), one end of the driving block (14) is located inside the side wall of the feed port (11), and is provided with a wedge block, a support block (15) is abutted on the inclined surface of the wedge block, and a baffle is provided on the support block (15), the baffle comprises a first baffle (152), a second baffle (153) and a third baffle (154) which are hinged in sequence, and a torsion spring is provided at the hinge, and the support block (15) is fixedly connected to the first baffle (152).

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