Stock stop device of stock bin

Abstract

The embodiment of the utility model provides a stock bin material blocking device, and relates to the technical field of garbage sorting. The stock bin material blocking device comprises a stock bin body, a valve and a material blocking structure, and a discharging opening is formed in the stock bin body; the valve is in sliding fit with the stock bin body and is used for opening or closing the discharge port; wherein the two ends, in the sliding direction of the valve, of the stock bin body are provided with a door opening end and a door closing end respectively, and at least one of the door opening end and the door closing end is provided with a material blocking structure, so that in the at least one process of opening and closing the discharging port through the valve, material blocking is conducted on a leakage gap between the discharging port and the valve. According to the stock bin material blocking device, the probability that materials are clamped between the discharging port and the valve can be reduced, normal operation of the valve is guaranteed, and the sorting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste sorting technology, and more specifically, to a hopper retaining device. Background Technology

[0002] In the waste sorting and processing process, especially in the sorting of plastic bottles, the hopper plays a crucial role as an important storage and sorting device. During the specific sorting operation, the system regulates the material flow at the hopper outlet by controlling the opening and closing of valves, thereby achieving precise sorting.

[0003] However, in actual operation, there is a certain gap between the hopper outlet and the valve. During the opening or closing of the valve, material can easily get stuck in this gap, causing the valve to malfunction. This fault not only interrupts the sorting process but also affects the stable operation of the entire equipment system, thereby reducing sorting efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a material blocking device for a hopper, which can reduce the probability of material getting stuck between the outlet and the valve, ensure the normal operation of the valve, and improve the sorting efficiency.

[0005] The embodiments of this utility model are implemented as follows:

[0006] An embodiment of this utility model provides a hopper retaining device, comprising:

[0007] The hopper body has a discharge port.

[0008] A valve, which is slidably fitted to the hopper body, is used to open or close the discharge port;

[0009] The hopper body is provided with an opening end and a closing end at both ends along the sliding direction of the valve. At least one of the opening end and the closing end is provided with a material blocking structure, so as to block the leakage gap between the discharge port and the valve during at least one process of the valve opening and closing the discharge port.

[0010] In an optional embodiment, the material blocking structure includes an opening material blocking structure, which is connected to the opening end and located between the discharge port and the valve. The opening material blocking structure is used to block the leakage gap between the discharge port and the valve during the process of the valve opening the discharge port.

[0011] In an optional embodiment, the door opening and material blocking structure includes a material blocking plate and a connecting member. The material blocking plate is connected to the door opening end through the connecting member, and the bottom end of the material blocking plate extends to the surface of the valve and contacts the valve.

[0012] In an optional embodiment, the connector includes a first fastener and a first connecting portion and a second connecting portion connected to each other, the first connecting portion being connected to the door opening end, and the second connecting portion extending toward the valve;

[0013] The baffle plate is connected to the second connecting part via the first fastener, and the baffle plate is spaced apart from the door opening end; and / or,

[0014] The baffle plate is a rubber plate; and / or,

[0015] The baffle plate is located on the side of the opening end near the discharge port.

[0016] In an optional embodiment, the material blocking structure includes a door-closing material blocking structure, which is connected to the closing end of the door. The door-closing material blocking structure is located between the discharge port and the valve, and is used to block the leakage gap between the discharge port and the valve during the process of the valve closing the discharge port.

[0017] In an optional embodiment, the closing and material-blocking structure includes a mounting plate, a rotating shaft, and a counterweight. The mounting plate is connected to the closing end, the rotating shaft is disposed on the mounting plate, and the counterweight is rotatably disposed on the rotating shaft. The end of the counterweight near the discharge port abuts against the closing end.

[0018] In an optional embodiment, the number of counterweights is multiple, and the multiple counterweights are arranged sequentially at intervals along the axial direction of the rotating shaft.

[0019] In an optional embodiment, the door closing stop structure includes an elastic element and a second fastener, the elastic element being connected to the closing end via the second fastener, and the elastic element extending toward the valve.

[0020] In an optional embodiment, the valve includes a valve bracket, a door panel, and a drive component. The valve bracket is connected to the hopper body, the door panel is slidably engaged with the valve bracket, and the drive component is disposed on the valve bracket and connected to the door panel. The drive component is used to drive the door panel to move relative to the valve bracket and the discharge port to open or close the discharge port.

[0021] In an optional embodiment, the hopper retaining device further includes a magnetic ring and a proximity switch. The magnetic ring is disposed on the movable part of the driving member, and the proximity switch is disposed on the fixed part of the driving member. The magnetic ring is used to cooperate with the proximity switch.

[0022] The beneficial effects of this utility model embodiment include:

[0023] The silo blocking device includes a silo body, a valve, and a blocking structure. The silo body has a discharge port. The valve is slidably fitted with the silo body to open or close the discharge port. The silo body has an opening end and a closing end at both ends along the sliding direction of the valve. At least one of the opening end and the closing end has a blocking structure, so that during at least one process of opening and closing the discharge port, the leakage gap between the discharge port and the valve is blocked.

[0024] As is easy to understand, during the process of the valve sliding relative to the discharge port, that is, during the process of opening or closing the discharge port, the baffle structure can block the material and prevent the material from entering the gap between the discharge port and the valve. This reduces the probability of the material getting stuck between the discharge port and the valve, ensures the normal operation of the valve, and improves the sorting efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a first-view structural schematic diagram of the hopper retaining device provided in an embodiment of the present utility model;

[0027] Figure 2 A schematic diagram of the installation of the door-opening and material-blocking structure and the hopper body provided in an embodiment of this utility model;

[0028] Figure 3 This is a second-view structural schematic diagram of the hopper retaining device provided in an embodiment of the present utility model;

[0029] Figure 4 A schematic diagram of the installation of the door-closing and material-blocking structure and the hopper body provided in this embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the hopper retaining device provided in other embodiments of the present invention;

[0031] Figure 6 for Figure 5 A magnified view of a section at point C;

[0032] Figure 7 A schematic diagram of the valve provided in an embodiment of this utility model.

[0033] Icons: 100-Booth retaining device; 10-Booth body; 11-Discharge port; 12-Opening end; 13-Closing end; 20-Valve; 21-Valve bracket; 22-Door panel; 23-Drive component; 231-Moving part; 232-Fixing part; 30-Opening retaining structure; 31-Booth plate; 32-Connector; 321-First fastener; 3211-Fastening bolt; 3212-Fastening nut; 3213-Spring washer; 3214-Flat washer; 322-First connecting part; 323-Second connecting part; 50-Closing retaining structure; 51-Mounting plate; 52-Rotating shaft; 53-Counterweight; 54-Elastic component; 55-Second fastener; 60-Proximity switch; 70-Booth bracket; 80-Booth enclosure. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] As described in the background section, a certain gap exists between the hopper outlet and the valve during actual operation. However, during the opening or closing of the valve, material can easily get stuck in this gap, causing the valve to malfunction. This fault not only interrupts the sorting process but also affects the stable operation of the entire equipment system, thereby reducing sorting efficiency.

[0041] Based on this, please refer to Figures 1-7 This utility model provides a hopper retaining device 100, which can effectively improve the aforementioned technical problems. Specifically, it can reduce the probability of material getting stuck between the discharge port 11 and the valve 20, ensure the normal operation of the valve 20, and improve sorting efficiency. The hopper retaining device 100 will be described in detail below.

[0042] Please refer to Figure 1 , Figure 1 This is a first-view structural schematic diagram of the hopper retaining device 100 provided in this embodiment, combined with... Figure 1The silo blocking device 100 includes a silo body 10, a valve 20, and a blocking structure. The silo body 10 has a discharge port 11. The valve 20 is slidably engaged with the silo body 10 to open or close the discharge port 11. The silo body 10 has an opening end 12 and a closing end 13 at both ends along the sliding direction of the valve 20. At least one of the opening end 12 and the closing end 13 has a blocking structure, so that during at least one process of the valve 20 opening and closing the discharge port 11, the leakage gap between the discharge port 11 and the valve 20 is blocked.

[0043] As is easily understood, during the process of valve 20 sliding relative to outlet 11, that is, during the process of opening or closing outlet 11, the baffle structure can block the material and prevent the material from entering the gap between outlet 11 and valve 20, thereby reducing the probability of material getting stuck between outlet 11 and valve 20, ensuring the normal operation of valve 20, and improving sorting efficiency.

[0044] It should be noted that the sliding direction of valve 20 mentioned above is... Figure 1 As shown in the diagram, the AB direction means that when valve 20 slides relative to outlet 11 in direction A, it closes outlet 11; when valve 20 slides relative to outlet 11 in direction B, it opens outlet 11.

[0045] In this embodiment, the material blocking structure includes an opening material blocking structure 30, which is connected to the opening end 12 and located between the discharge port 11 and the valve 20. The opening material blocking structure 30 is used to block the leakage gap between the discharge port 11 and the valve 20 during the process of the valve 20 opening the discharge port 11.

[0046] In other words, by setting the door opening and material blocking structure 30, when the valve 20 slides relative to the discharge port 11 in the B direction, the door opening and material blocking structure 30 can always block the material falling from the discharge port 11, reducing the probability of the material getting stuck between the door opening end 12 and the valve 20.

[0047] For details, please refer to Figure 2 , Figure 2 This is a schematic diagram of the installation of the door-opening and material-blocking structure 30 and the hopper body 10 provided in this embodiment, combined with... Figure 1 and Figure 2 The door opening and material blocking structure 30 includes a material blocking plate 31 and a connecting member 32. The material blocking plate 31 is connected to the door opening end 12 through the connecting member 32. The bottom end of the material blocking plate 31 extends to the surface of the valve 20 and contacts the valve 20. By having the bottom end of the material blocking plate 31 contact the surface of the valve 20, the probability of material getting stuck in the gap can be further reduced, thereby improving the material blocking effect.

[0048] It should be noted that in this embodiment, the baffle plate 31 is a rubber plate, that is, it is made of rubber material, which can minimize the gap between it and the valve 20, and can also flexibly cooperate with the surface of the valve 20 to avoid affecting the normal sliding of the valve 20, thereby improving the smoothness and stability of the valve 20 in the process of opening or closing the discharge port 11.

[0049] Furthermore, the connector 32 includes a first fastener 321 and a first connecting portion 322 and a second connecting portion 323 connected thereto. The first connecting portion 322 is connected to the door opening end 12, and the second connecting portion 323 extends toward the valve 20. The baffle plate 31 is connected to the second connecting portion 323 via the first fastener 321, and the baffle plate 31 is spaced apart from the door opening end 12.

[0050] By providing the connector 32, the baffle plate 31 can be easily disassembled or installed, improving installation and maintenance efficiency. Furthermore, by connecting the baffle plate 31 to the second connecting part 323 and spacing it from the opening end 12, it serves to avoid direct contact between the baffle plate 31 and the opening end 12. This prevents the baffle plate 31 from shaking or vibrating during material blocking, thus protecting the structure of the hopper body 10 from damage.

[0051] It should be noted that in this embodiment, the first connecting part 322 and the second connecting part 323 are arranged perpendicularly, that is, the connector 32 has an overall "L" shape, which facilitates connection with the door end 12 and the baffle plate 31 respectively, and the two do not interfere with each other, thus improving installation efficiency. Of course, in other embodiments, the included angle between the first connecting part 322 and the second connecting part 323 can also be an acute angle or an obtuse angle, and the connector 32 can also have other shapes.

[0052] To further improve the material blocking effect, a baffle plate 31 is disposed on the side of the opening end 12 near the discharge port 11. Specifically, in this embodiment, the baffle plate 31 is disposed on the side of the second connecting part 323 near the discharge port 11. In this way, material can be prevented from entering the gap between the second connecting part 323 and the valve 20, and the baffle plate 31 as a whole can directly contact the material, which can further improve the material blocking effect, and at the same time, it can protect the opening end 12 or the second connecting part 323.

[0053] It should be noted that in this embodiment, the baffle plate 31 and the second connecting part 323 are fixedly connected by bolts. Specifically, the first fastener 321 includes a fastening bolt 3211 and a fastening nut 3212. The fastening bolt 3211 passes through both the baffle plate 31 and the second connecting part 323 and then engages with the fastening nut 3212 by thread.

[0054] In order to protect the connecting surface, increase the contact area and improve the fastening effect, the first fastener 321 also includes a spring washer 3213 and a flat washer 3214. The spring washer 3213 and the flat washer 3214 are sleeved on the fastening bolt 3211 and are located between the second connecting part 323 and the fastening nut 3212.

[0055] Of course, in other embodiments, the baffle plate 31 and the second connecting part 323 can also be fixed by riveting, pin connection, magnetic connection or other means.

[0056] Please refer to Figure 3 , Figure 3 This is a second-view structural schematic diagram of the hopper retaining device 100 provided in this embodiment, combined with... Figure 1 and Figure 3 The material blocking structure also includes a door-closing material blocking structure 50, which is connected to the door end 13. The door-closing material blocking structure 50 is located between the outlet 11 and the valve 20, and is used to block the leakage gap between the outlet 11 and the valve 20 during the process of the valve 20 closing the outlet 11.

[0057] In other words, the closing material blocking structure 50 and the opening material blocking structure 30 are arranged opposite to each other. When the valve 20 slides along the A direction relative to the discharge port 11, the closing material blocking structure 50 can also block the material falling from the discharge port 11, reducing the probability of the material getting stuck between the closing end 13 and the valve 20, thereby ensuring the normal operation of the valve 20.

[0058] For details, please refer to Figure 4 , Figure 4 This is a schematic diagram of the installation of the door-closing and material-blocking structure 50 and the hopper body 10 provided in this embodiment, combined with... Figure 3 and Figure 4 The closing and material-blocking structure 50 includes a mounting plate 51, a rotating shaft 52, and a counterweight 53. The mounting plate 51 is connected to the closing end 13, the rotating shaft 52 is disposed on the mounting plate 51, and the counterweight 53 is rotatably disposed on the rotating shaft 52. The end of the counterweight 53 near the discharge port 11 abuts against the closing end 13.

[0059] As is easily understood, when valve 20 is closing the discharge port 11, the material will fall onto valve 20 under the action of gravity and move along direction A with valve 20. Through the rotational cooperation of counterweight 53 and rotating shaft 52, the material on valve 20 will slightly lift counterweight 53, thereby ensuring that valve 20 can close normally. When valve 20 is opening the discharge port 11, the material on valve 20 will fall off under the action of counterweight 53, thereby avoiding material jamming and ensuring the normal operation of valve 20.

[0060] It should be noted that in this embodiment, there are multiple counterweights 53, which are arranged sequentially at intervals along the axis of the rotating shaft 52. Since the position of the material during the feeding process is uncertain, by setting multiple counterweights 53, the material at different positions along the axis of the rotating shaft 52 can be abutted and cooperated, further improving the material blocking effect, thereby further reducing the probability of material jamming, thus ensuring the normal operation of the valve 20 and further improving the sorting efficiency.

[0061] Of course, in some other embodiments, the door-closing stop structure 50 can also be other structures, that is, other structures can replace the interaction between the counterweight 53 and the rotating shaft 52. For example, please refer to Figure 5 and Figure 6 , Figure 5 This is a structural schematic diagram of the hopper retaining device 100 provided in other embodiments. Figure 6 for Figure 5 A magnified view of a section at point C.

[0062] Combination Figure 5 and Figure 6 In some other embodiments, the closing and material-blocking structure 50 includes an elastic element 54 and a second fastener 55. The elastic element 54 is connected to the closing end 13 via the second fastener 55, and the elastic element 54 extends toward the valve 20. It is easy to understand that during the process of the valve 20 closing the outlet 11, the material on the valve 20 will come into contact with the elastic element 54, causing it to undergo elastic deformation, thereby ensuring that the valve 20 can close normally. During the process of the valve 20 opening the outlet 11, the material on the valve 20 will fall off under the elastic force of the elastic element 54, thereby preventing material jamming and ensuring the normal operation of the valve 20.

[0063] It should be noted that in this embodiment, the elastic element 54 is a bent spring steel. Of course, in other embodiments, the elastic element 54 can also be a spring sheet, a rubber pad, or a bellows or other elastic structure.

[0064] Please refer to Figure 7 , Figure 7 This is a structural schematic diagram of the valve 20 provided in this embodiment, combined with... Figure 1 and Figure 7 Specifically, valve 20 includes valve support 21, door panel 22 and drive component 23. Valve support 21 is connected to hopper body 10. Door panel 22 is slidably engaged with valve support 21. Drive component 23 is disposed on valve support 21 and connected to door panel 22. Drive component 23 is used to drive door panel 22 to move relative to valve support 21 and discharge port 11 to open or close discharge port 11.

[0065] It should be noted that in this embodiment, the driving component 23 is specifically a cylinder. Of course, in other embodiments, the driving component 23 can also be a hydraulic cylinder, an electric push rod, or other driving structures.

[0066] Furthermore, to ensure that the door panel 22 is closed in place and to prevent material from leaking out of the discharge port 11, thereby improving the accuracy of the sorting process, in this embodiment, the hopper retaining device 100 also includes a magnetic ring (not shown) and a proximity switch 60. The magnetic ring is disposed on the movable part 231 of the drive member 23, and the proximity switch 60 is disposed on the fixed part 232 of the drive member 23. The magnetic ring is used to cooperate with the proximity switch 60.

[0067] Specifically, in this embodiment, the magnetic ring is mounted on the internal piston of the cylinder, while the proximity switch 60 is mounted on the fixed housing of the cylinder. During the closing process of the door panel 22, the piston moves relative to the discharge port 11 and extends out of the fixed housing of the cylinder. When the magnetic ring approaches the proximity switch 60, the proximity switch 60 receives the signal from the magnetic ring through magnetic attraction induction and feeds back the closing signal of the valve 20. It is easy to understand that the magnetic ring will only approach the proximity switch 60 after the door panel 22 is fully closed, thereby realizing the feedback of the closing signal to the control system to ensure the normal operation of the system.

[0068] Based on the above explanation, it should be noted that, since the door closing and material blocking structure 50 adopts a flexible structure (e.g., the counterweight 53 rotates relative to the rotating shaft 52, or the elasticity of the elastic element 54), the door panel 22 is not easily jammed by materials and cannot be closed, and the proximity switch 60 is less likely to fail to sense the signal received by the magnetic ring, thus avoiding the problem that the valve 20's closing signal cannot be fed back.

[0069] Please continue to combine Figure 1 The hopper retaining device 100 also includes a retaining bracket and a hopper enclosure 80. The hopper body 10 is mounted on the hopper bracket 70, and the valve bracket 21 of the valve 20 is connected to the hopper bracket 70, which can improve installation stability. The hopper enclosure 80 is located at the feed inlet of the hopper body 10, which can reduce the spillage of materials during the feeding process.

[0070] In summary, the embodiments of this utility model provide a silo blocking device 100, which includes a silo body 10, a valve 20, and a blocking structure. The silo body 10 has a discharge port 11. The valve 20 is slidably engaged with the silo body 10 to open or close the discharge port 11. The silo body 10 has an opening end 12 and a closing end 13 at both ends along the sliding direction of the valve 20. At least one of the opening end 12 and the closing end 13 has a blocking structure, so that during at least one process of the valve 20 opening and closing the discharge port 11, the leakage gap between the discharge port 11 and the valve 20 is blocked. As is easily understood, during the process of valve 20 sliding relative to outlet 11, that is, during the process of opening or closing outlet 11, the baffle structure can block the material and prevent the material from entering the gap between outlet 11 and valve 20, thereby reducing the probability of material getting stuck between outlet 11 and valve 20, ensuring the normal operation of valve 20, and improving sorting efficiency.

[0071] The above description is merely a specific embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bin dam device, characterized by, include: The hopper body (10) is provided with a discharge port (11); A valve (20) is slidably engaged with the hopper body (10) to open or close the discharge port (11); The hopper body (10) is provided with an opening end (12) and a closing end (13) at both ends along the sliding direction of the valve (20). At least one of the opening end (12) and the closing end (13) is provided with a material blocking structure, so that during at least one process of the valve (20) opening and closing the discharge port (11), the leakage gap between the discharge port (11) and the valve (20) is blocked.

2. The bin dam of claim 1, wherein, The material blocking structure includes an opening material blocking structure (30), which is connected to the opening end (12) and located between the discharge port (11) and the valve (20). The opening material blocking structure (30) is used to block the leakage gap between the discharge port (11) and the valve (20) during the process of the valve (20) opening the discharge port (11).

3. The bin dam of claim 2, wherein, The door opening and material blocking structure (30) includes a material blocking plate (31) and a connecting member (32). The material blocking plate (31) is connected to the door opening end (12) through the connecting member (32). The bottom end of the material blocking plate (31) extends to the surface of the valve (20) and contacts the valve (20).

4. The bin dam of claim 3, wherein, The connector (32) includes a first fastener (321) and a first connecting part (322) and a second connecting part (323) connected to each other. The first connecting part (322) is connected to the door opening end (12), and the second connecting part (323) extends toward the valve (20). The baffle plate (31) is connected to the second connecting part (323) via the first fastener (321), and the baffle plate (31) is spaced apart from the door opening end (12); and / or, The baffle plate (31) is a rubber plate; and / or, The baffle plate (31) is located on the side of the opening end (12) near the discharge port (11).

5. The bin dam of claim 1, wherein, The material blocking structure includes a door-closing material blocking structure (50), which is connected to the door end (13). The door-closing material blocking structure (50) is located between the outlet (11) and the valve (20) and is used to block the leakage gap between the outlet (11) and the valve (20) during the process of the valve (20) closing the outlet (11).

6. The bin dam of claim 5, wherein, The closing and material-blocking structure (50) includes a mounting plate (51), a rotating shaft (52), and a counterweight (53). The mounting plate (51) is connected to the closing end (13). The rotating shaft (52) is disposed on the mounting plate (51). The counterweight (53) is rotatably disposed on the rotating shaft (52). The end of the counterweight (53) near the discharge port (11) abuts against the closing end (13).

7. The bin dam of claim 6, wherein, The number of counterweights (53) is multiple, and the multiple counterweights (53) are arranged sequentially at intervals along the axial direction of the rotating shaft (52).

8. The bin dam of claim 5, wherein, The closing stop structure (50) includes an elastic element (54) and a second fastener (55). The elastic element (54) is connected to the closing end (13) via the second fastener (55), and the elastic element (54) extends toward the valve (20).

9. The bin damper of any of claims 1-8, wherein, The valve (20) includes a valve bracket (21), a door panel (22), and a drive component (23). The valve bracket (21) is connected to the hopper body (10). The door panel (22) is slidably engaged with the valve bracket (21). The drive component (23) is disposed on the valve bracket (21) and connected to the door panel (22). The drive component (23) is used to drive the door panel (22) to move relative to the valve bracket (21) and the discharge port (11) to open or close the discharge port (11).

10. The hopper retaining device according to claim 9, characterized in that, The hopper retaining device (100) also includes a magnetic ring and a proximity switch (60). The magnetic ring is disposed on the movable part (231) of the drive member (23), and the proximity switch (60) is disposed on the fixed part (232) of the drive member (23). The magnetic ring is used to cooperate with the proximity switch (60).

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