hopper and ship unloader

Abstract

The present disclosure relates to a hopper and ship unloader, the hopper comprising a hopper body, an intercepting assembly, a charged spray dust suppression assembly, an air curtain assembly and a blocking assembly. The hopper body has a feeding port. The intercepting assembly is arranged in the hopper body for obstructing the falling of the material, and the intercepting assembly is capable of emitting electric charges. The charged spray dust suppression assembly is arranged above the intercepting assembly for spraying water mist for capturing dust, and the water mist carries electric charges of opposite polarity to the electric charges emitted on the intercepting assembly. The air curtain assembly is arranged above the charged spray dust suppression assembly for generating an air curtain for intercepting dust. The blocking assembly is movably arranged on the feeding port, and the blocking assembly is configured to block the feeding port when the material is completely fed into the hopper body. Through the above technical solution, the intercepting assembly, the charged spray dust suppression assembly, the air curtain assembly and the blocking assembly are not affected by the airflow in the external environment, ensuring good dust suppression effect and avoiding dust from spreading to the external environment.

Description

Technical Field

[0001] This disclosure relates to the field of ship unloaders, and more specifically, to a hopper and a ship unloader. Background Technology

[0002] Ship unloaders are primarily used for unloading cargo from ships in ports. They typically consist of a grab bucket for grasping materials and a hopper for receiving cargo. Taking the unloading of bulk granular materials such as coal as an example, when unloading from a ship, the material is first grabbed from the ship by the grab bucket, then moved to the hopper position and opened to allow the material to fall into the hopper. During the falling process, the material collides with the inside of the hopper, generating a large amount of dust. This dust can overflow through the hopper's inlet, causing environmental pollution. When the dust concentration is too high, it can also easily cause an explosion, affecting the safety of the dock. In related technologies, to prevent dust overflow, a spray device is usually installed near the hopper to capture dust through water mist. However, this is easily affected by airflow in the external environment, making it difficult for the water mist to capture dust, resulting in poor dust suppression. Summary of the Invention

[0003] The purpose of this disclosure is to provide a hopper and a ship unloader to solve the problem of poor effectiveness in preventing dust spillage using spray devices in related technologies.

[0004] The first objective of this disclosure is to provide a hopper, including

[0005] The hopper body has a feed inlet;

[0006] An interception component, disposed within the hopper body, is used to prevent the material from falling; the interception component is capable of discharging an electrical charge.

[0007] A charged spray dust suppression component is disposed above the interception component and is used to spray water mist to capture dust. The water mist carries a charge with a polarity opposite to that emitted from the interception component.

[0008] An air curtain assembly, disposed above the charged spray dust suppression assembly, is used to generate an air curtain that intercepts dust; and

[0009] A blocking component is movably disposed on the feed inlet, the blocking component being configured to block the feed inlet when all the material has entered the hopper body.

[0010] Optionally, the interception component includes a grid, a first electrode, and a first electrostatic generator. The first electrode is disposed on the grid and connected to the first electrostatic generator for dissipating charge. The grid has channels for wiring.

[0011] Optionally, the charged spray dust suppression assembly includes a cylinder, a first fan, a first nozzle, a second electrode, and a second electrostatic generator. The cylinder passes through the side wall of the hopper body. The first fan is located at one end of the cylinder, and the first nozzle and the second electrode are located at the other end of the cylinder. The second electrode is electrically connected to the second electrostatic generator. The cylinder is provided with a first liquid pipe and a first gas pipe. The first liquid pipe is connected to the first nozzle and communicates with the outside. The first gas pipe is connected to the first nozzle and communicates with the outside.

[0012] Optionally, multiple charged spray dust suppression components are arranged at intervals along a circular trajectory, wherein the water mist spraying direction of the multiple charged spray dust suppression components is tangent to the circular trajectory, so that an air cyclone is formed in the hopper body.

[0013] Optionally, the air curtain assembly includes a second gas pipe, a second fan connected to the second gas pipe, and a first baffle plate. The first baffle plate is disposed above the second gas pipe, and the second gas pipe has a plurality of spaced strip-shaped air outlets.

[0014] Optionally, the air curtain assembly further includes a third electrostatic generator and a third electrode and a fourth electrode disposed within the second gas pipe. The third electrode and the fourth electrode are disposed opposite to each other. The third electrode is connected to the third electrostatic generator, and the fourth electrode is grounded. The third electrode is used to discharge and generate an electric arc between itself and the fourth electrode to ionize the air. A plurality of third electrodes are disposed at intervals along the extension direction of the second gas pipe, and the fourth electrode is constructed as a strip electrode extending along the extension direction of the second gas pipe.

[0015] Optionally, the air curtain assembly is arranged adjacent to the sealing assembly, and the air curtain assembly further includes a second nozzle disposed below the second gas pipe, the second nozzle being used to spray water mist to clean the sealing assembly.

[0016] Optionally, the air curtain assembly further includes a second shield for protecting the second nozzle, the second shield being disposed above the second nozzle.

[0017] Optionally, two air curtain components are provided, and the two air curtain components are respectively provided on two opposite inner walls of the hopper body.

[0018] Optionally, the sealing assembly includes a horizontally movable cover plate and a drive motor, with a gear on the output shaft of the drive motor and a horizontally extending rack on the cover plate capable of meshing with the gear.

[0019] Optionally, the edge of the cover plate is provided with a gas filter membrane to fill the gap between the edge of the cover plate and the edge of the feed inlet.

[0020] Optionally, the hopper further includes a dust concentration detection sensor disposed above the feed inlet and a position detection sensor disposed at the edge of the feed inlet, the position detection sensor being used to detect whether all the material has entered the hopper body.

[0021] A second object of this disclosure is to provide a ship unloader comprising the hopper described in any of the foregoing.

[0022] Through the above technical solutions, the interception component reduces dust generation, the water mist sprayed by the charged spray dust suppression component captures dust, and the air curtain component intercepts dust. Furthermore, the interception component works in conjunction with the charged spray dust suppression component; the charged water mist and the charged dust particles attract each other, making it easier for the water mist to capture dust, ensuring the effectiveness of the water mist and further reducing dust floating inside the hopper. The air curtain component also works in conjunction with the charged spray dust suppression component to further intercept dust that is not captured by the water mist, further preventing dust from spilling from the feed inlet into the external environment. The sealing component allows dust spilled from the hopper to fall down on its own or be gradually captured by the water mist until there is no floating dust inside the hopper. The interception component, charged spray dust suppression component, air curtain component, and sealing component are not affected by airflow in the external environment, ensuring good dust suppression effect and preventing dust from spilling into the external environment.

[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the hopper provided in an exemplary embodiment of this disclosure;

[0026] Figure 2 yes Figure 1 Enlarged view of section A;

[0027] Figure 3 This is a schematic diagram of the hopper provided in an exemplary embodiment of this disclosure from another perspective;

[0028] Figure 4 yes Figure 3 Enlarged view of section B;

[0029] Figure 5 yes Figure 3 Cross-sectional view of section B;

[0030] Figure 6 This is a top view of the hopper provided in an exemplary embodiment of this disclosure;

[0031] Figure 7 This is a schematic diagram of the structure of the interception component provided in an exemplary embodiment of this disclosure;

[0032] Figure 8 This is a schematic diagram of the structure of the charged spray dust suppression component provided in an exemplary embodiment of this disclosure;

[0033] Figure 9 This is a schematic diagram of the structure of the charged spray dust suppression component provided in an exemplary embodiment of this disclosure from another perspective.

[0034] Explanation of reference numerals in the attached figures

[0035] 1-Hopper body, 11-Inlet, 2-Interception component, 21-Grid mesh, 22-First electrode, 3-Charged spray dust suppression component, 31-Cylinder, 32-First fan, 33-First nozzle, 34-Second electrode, 4-Air curtain component, 41-Second gas pipe, 411-Outlet, 42-First shield, 43-Third electrode, 44-Fourth electrode, 45-Second nozzle, 46-Second shield, 5-Sealing component, 51-Cover plate, 52-Drive motor, 53-Gear. Detailed Implementation

[0036] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0037] In this disclosure, unless otherwise stated, directional terms generally refer to the control box provided in this disclosure under normal operating conditions. "Inner" and "outer" may refer to the inner and outer contours of the corresponding component or its location within or outside its environment, depending on the specific context. Furthermore, when the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications.

[0038] like Figures 1 to 9As shown, the first objective of this disclosure is to provide a hopper, including a hopper body 1, an interception component 2, a charged spray dust suppression component 3, an air curtain component 4, and a blocking component 5. The hopper body 1 has a feed inlet 11. The interception component 2 is disposed within the hopper body 1 to obstruct the falling material; the interception component 2 is capable of discharging an electric charge. The charged spray dust suppression component 3 is disposed above the interception component 2 and is used to spray a water mist that captures dust; the water mist carries a charge of opposite polarity to the charge discharging from the interception component 2. The air curtain component 4 is disposed above the charged spray dust suppression component 3 and is used to generate an air curtain that intercepts dust. The blocking component 5 is movably disposed on the feed inlet 11 and is configured to block the feed inlet 11 when all the material has entered the hopper body 1.

[0039] The interception component 2 reduces the falling speed of the material, decreasing dust generated when the material collides with the inner wall of the hopper body 1. The water mist sprayed by the charged spray dust suppression component 3 further captures the dust floating inside the hopper body 1. The charge emitted by the interception component 2 adheres to the dust near the interception component 2, while the water mist carries a charge with the opposite polarity to the charge emitted by the interception component 2. For example, when the interception component 2 emits a positive charge, the water mist sprayed by the charged spray dust suppression component 3 carries a negative charge. The two charges with opposite polarities attract each other, meaning that the water mist carrying a negative charge and the dust adhering to it with a positive charge attract each other. This makes it easier for the water mist to capture the dust, ensuring the dust suppression effect of the water mist and further reducing the dust floating inside the hopper body 1. The air curtain component 4 is located above the charged spray dust suppression component 3 and can be used to generate an air curtain to intercept dust. The air curtain does not affect the material entering the hopper body 1, and at the same time, the air curtain can also intercept dust that has not been captured by the water mist, further preventing dust from escaping from the feed inlet 11 into the external environment. When all the material enters the hopper body 1, the sealing component 5 will seal the feed inlet 11. After the feed inlet 11 is sealed, the dust in the hopper body 1 will not be scattered into the external environment. The dust scattered in the hopper body 1 will fall by itself or be gradually captured by water mist until there is no floating dust in the hopper body 1.

[0040] Through the above technical solutions, the interception component 2 can reduce dust generation, the water mist sprayed by the charged spray dust suppression component 3 can capture dust, and the air curtain component 4 can intercept dust. Furthermore, the interception component 2 can cooperate with the charged spray dust suppression component 3; the charged water mist and the charged dust particles attract each other, making it easier for the water mist to capture dust, ensuring the effectiveness of the water mist and further reducing the dust floating inside the hopper body 1. The air curtain component 4 also cooperates with the charged spray dust suppression component 3 to further intercept dust that is not captured by the water mist, further preventing dust from spilling out of the feed inlet 11 into the external environment. The sealing component 5 allows the dust spilled from the hopper body 1 to fall down on its own or be gradually captured by the water mist until there is no floating dust inside the hopper body 1. The interception component 2, the charged spray dust suppression component 3, the air curtain component 4, and the sealing component 5 are not affected by airflow in the external environment, ensuring a good dust suppression effect and preventing dust from spilling into the external environment.

[0041] In some embodiments, the interception component 2 may include a grid mesh 21, a first electrode 22, and a first electrostatic generator. The first electrode 22 is disposed on the grid mesh 21 and connected to the first electrostatic generator for dissipating charge. The grid mesh 21 has channels for wiring. The mesh openings between the grid meshes 21 allow material to pass through, and the beams constituting the grid mesh 21 intercept the material, reducing its falling speed. Depending on the shape and weight of the material, the first electrode 22 may have different shapes and arrangements. When the material is light and the particles are small, the first electrode 22 may be constructed in a cone shape and disposed on the sidewall of the beams constituting the grid mesh 21, as detailed in [reference needed]. Figure 7 Because the material is light and the particles are small, the first electrode 22 will not be subjected to much impact when it comes into contact with the material, making it less prone to damage and deformation. In this case, the first electrode 22 can be constructed in a conical shape to better dissipate the charge. When the material is heavy and the particles are large, the first electrode 22 will experience a greater impact force when it comes into contact with the material. In this case, the first electrode 22 can be constructed in a convex shape, making it even less prone to damage and deformation. The grid mesh 21 has channels for wiring. These channels can be formed within the beams that make up the grid mesh 21, which can protect the circuit without affecting the use of the grid mesh 21.

[0042] In some embodiments, the charged spray dust suppression assembly 3 may include a cylinder 31, a first fan 32, a first nozzle 33, a second electrode 34, and a second electrostatic generator. The cylinder 31 penetrates the side wall of the hopper body 1. The first fan 32 is located at one end of the cylinder 31, and the first nozzle 33 and the second electrode 34 are located at the other end of the cylinder 31. The second electrode 34 is electrically connected to the second electrostatic generator. The cylinder 31 is provided with a first liquid pipe and a first gas pipe. The first liquid pipe is connected to the first nozzle 33 and communicates with the outside. The first gas pipe is also connected to the first nozzle 33 and communicates with the outside. The first nozzle 33 is connected to both the first liquid pipe and the first gas pipe. The first nozzle 33 may be a dual-fluid nozzle, which can atomize liquid using gas. In this way, gas and liquid will enter the first nozzle 33 simultaneously, and the liquid will be dispersed within the first nozzle 33 to form a water mist. The cylinder 31 can concentrate the air blown out by the first blower 32 and ensure the airflow path, so that the air blown out by the first blower 32 will blow the water mist into the hopper body 1. The arrangement and shape of the first nozzle 33 and the second electrode 34 can be referred to Figure 8 and Figure 9 ,by Figure 8 Taking the direction of the drawing as an example, the cylinder 31 along Figure 8 Extending left and right in the direction shown in the diagram, the first blower 32 is located at the left end of the cylinder 31. The first nozzle 33 and the second electrode 34 are located at the right end of the cylinder 31, with the second electrode 34 positioned to the right of the first nozzle 33. Thus, the second electrode 34, electrically connected to the second electrostatic generator, first dissipates charge into the air. When the water mist is blown into the hopper body 1 from left to right, it first passes through the charged air, and the charge enters the water mist, making it carry a charge. To make the water mist carry more charge, the second electrode 34 can be placed as close as possible to the first nozzle 33.

[0043] Reference Figure 6 Multiple charged spray dust suppression components 3 can be arranged at intervals along a circular trajectory in a generally horizontal plane. The water mist spraying direction of each charged spray dust suppression component 3 is tangent to the circular trajectory, creating an air cyclone within the hopper body 1. The air cyclone drives the water mist and dust to rotate, causing the dust to float for a longer time, thus prolonging the interaction time between the water mist and dust. This gives the water mist sprayed by the charged spray dust suppression components 3 more opportunities to capture dust, ensuring the dust suppression effect of the water mist. Continuing... Figure 6 For reference, in Figure 6 In the process, the feed inlet 11 of the hopper body 1 is rectangular, and charged spray dust suppression components 3 are respectively installed on the four side walls of the hopper body 1. At this time, a cyclone rotating counterclockwise will be generated inside the hopper body 1. Figure 6 The direction of the dotted line in the diagram indicates the direction of the cyclone.

[0044] The air curtain assembly 4 may include a second gas duct 41, a second fan connected to the second gas duct 41, and a first baffle plate 42. The first baffle plate 42 is positioned above the second gas duct 41, and the second gas duct 41 has multiple spaced-apart strip-shaped air outlets 411. The strip-shaped air outlets 411 can further increase the air pressure, enabling the air curtain to better intercept dust. Figure 3 For example, the extension direction of the second gas pipe 41 can be the same as the extension direction of the edge of the feed inlet 11, and the extension length of the second gas pipe 41 can be the same as the extension length of the edge of the feed inlet 11. In this way, the air curtain generated by the air curtain assembly 4 can cover the feed inlet 11 as much as possible, ensuring the air curtain's interception effect on dust. The first baffle plate 42 can prevent the material from colliding with the second gas pipe 41.

[0045] The air curtain assembly 4 may further include a third electrostatic generator and a third electrode 43 and a fourth electrode 44 disposed within the second gas pipe 41. The third electrode 43 and the fourth electrode 44 are disposed opposite to each other. The third electrode 43 is connected to the third electrostatic generator, and the fourth electrode 44 is grounded. The third electrode 43 is used for discharge and generates an electric arc between itself and the fourth electrode 44 to ionize the air. Multiple third electrodes 43 are spaced apart along the extension direction of the second gas pipe 41, and the fourth electrode 44 is constructed as a strip-shaped electrode extending along the extension direction of the second gas pipe 41. See [reference needed] for details. Figure 4 and Figure 5 The electric arc generated between the third electrode 43 and the fourth electrode 44 causes gas molecules in the air to move. These molecules collide, losing electrons along with the air curtain into the hopper body 1. Since the interception component 2 and the charged spray dust suppression component 3 each emit charges with opposite polarities, one of them must emit a positive charge. Excessive accumulation of positive charge in the hopper body 1 can generate sparks, potentially causing an explosion of dust within the hopper body 1. Electrons, being negatively charged, attract and neutralize positive charges, preventing excessive accumulation of positive charge in the hopper body 1.

[0046] The air curtain assembly 4 can be arranged close to the sealing assembly 5. The air curtain assembly 4 also includes a second nozzle 45 disposed below the second gas pipe 41. The second nozzle 45 is used to spray water mist to clean the sealing assembly 5. Here, "the air curtain assembly 4 is arranged close to the sealing assembly 5" means that the air curtain assembly 4 can be arranged closer to the sealing assembly 5 in the vertical direction. Figures 1 to 3For example, the air curtain component 4 can be placed vertically close to the sealing component 5. This allows the air curtain generated by the air curtain component 4 to be closer to the sealing component 5. The air curtain will send the water mist sprayed by the second nozzle 45 to the vicinity of the sealing component 5. At the same time, the air curtain will also drive the air flow near the sealing component 5. In this way, the water mist and the flowing air will clean the sealing component 5, preventing too many impurities from adhering to the sealing component 5 and affecting its use.

[0047] The air curtain assembly 4 may further include a second baffle 46 for protecting the second nozzle 45, the second baffle 46 being disposed above the second nozzle 45. The second baffle 46 can protect the second nozzle 45, see reference. Figure 2 The second gas pipeline can also be installed on the second baffle plate 46, so that the second baffle plate 46 can also fix the second gas pipeline.

[0048] Two air curtain components 4 can be provided, with each component 4 positioned on one of the two opposite inner walls of the hopper body 1. The two air curtain components 4 can generate air curtains from the two opposite side walls of the hopper body 1, thus preventing insufficient airflow intensity at the far end of the air curtain from affecting the dust interception effect.

[0049] The sealing assembly 5 may include a horizontally movable cover plate 51 and a drive motor 52. A gear 53 is mounted on the output shaft of the drive motor 52, and a horizontally extending rack is mounted on the cover plate 51 that meshes with the gear 53. The gear 53 drives the cover plate 51 to move by rotating the gear 53. The gear 53 has high transmission efficiency, long service life, and high reliability, allowing the sealing assembly 5 to be used in the external environment for a long time.

[0050] To prevent dust from escaping into the external environment through the gap between the edge of the cover plate 51 and the edge of the feed inlet 11, a gas filter membrane can be provided on the edge of the cover plate 51 to fill the gap between the edges of the cover plate 51 and the feed inlet 11. In this way, the gap between the edge of the cover plate 51 and the edge of the feed inlet 11 is filled by the gas filter membrane, which further filters impurities in the gas without affecting gas flow, preventing dust from escaping into the external environment through the gap between the edges of the cover plate 51 and the feed inlet 11. The gas filter membrane can be made of an elastic material, making it less prone to damage.

[0051] The hopper may also include a dust concentration detection sensor positioned above the feed inlet 11 and a position detection sensor positioned at the edge of the feed inlet 11. The position detection sensor is used to detect whether all the material has entered the hopper body 1. By using the dust concentration data detected by the dust concentration detection sensor at the feed inlet 11, the extent of dust spillage from the feed inlet 11 can be determined, further allowing for adjustment of the intensity of the water mist sprayed from the charged spray dust suppression component 3 and the intensity of the air curtain generated by the air curtain component 4. The position detection sensor is used to detect whether all the material has entered the hopper body 1, preventing the sealing component 5 from mistakenly sealing the feed inlet 11.

[0052] Since the charged spray dust suppression component 3 needs to spray water mist during use, and the air curtain component 4 needs to spray air curtain during use, both the charged spray dust suppression component 3 and the air curtain component 4 have a certain self-cleaning effect. The material or dust in the hopper body 1 will not be blocked in the charged spray dust suppression component 3 or the air curtain component 4, thus ensuring the service life of the hopper.

[0053] According to a second aspect of this disclosure, a ship unloader is also provided, comprising the hopper of any of the above embodiments, and having all of its beneficial effects, which will not be elaborated here.

[0054] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not further describe the various possible combinations.

[0055] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A hopper, characterized in that, include The hopper body has a feed inlet; An interception component, disposed within the hopper body, is used to prevent the material from falling; the interception component is capable of discharging an electrical charge. A charged spray dust suppression component is disposed above the interception component and is used to spray water mist to capture dust. The water mist carries a charge with a polarity opposite to that emitted from the interception component. An air curtain assembly is disposed above the charged spray dust suppression assembly to generate an air curtain that intercepts dust. as well as A blocking component is movably disposed on the feed inlet, the blocking component being configured to block the feed inlet when all the material has entered the hopper body. The air curtain assembly includes a second gas pipe, a third electrostatic generator, and a third electrode and a fourth electrode disposed within the second gas pipe. The third electrode and the fourth electrode are disposed opposite to each other. The third electrode is connected to the third electrostatic generator, and the fourth electrode is grounded. The third electrode is used to discharge and generate an electric arc between itself and the fourth electrode to ionize the air. Multiple third electrodes are spaced apart along the extension direction of the second gas pipe, and the fourth electrode is constructed as a strip electrode extending along the extension direction of the second gas pipe.

2. The hopper according to claim 1, characterized in that, The interception component includes a grid, a first electrode, and a first electrostatic generator. The first electrode is disposed on the grid and connected to the first electrostatic generator for dissipating charge. The grid has channels for wiring.

3. The hopper according to claim 1, characterized in that, The charged spray dust suppression assembly includes a cylinder, a first fan, a first nozzle, a second electrode, and a second electrostatic generator. The cylinder passes through the side wall of the hopper body. The first fan is located at one end of the cylinder, and the first nozzle and the second electrode are located at the other end of the cylinder. The second electrode is electrically connected to the second electrostatic generator. The cylinder is provided with a first liquid pipe and a first gas pipe. The first liquid pipe is connected to the first nozzle and communicates with the outside. The first gas pipe is connected to the first nozzle and communicates with the outside.

4. The hopper according to claim 3, characterized in that, Multiple charged spray dust suppression components are arranged at intervals along a circular trajectory, wherein the water mist spraying direction of multiple charged spray dust suppression components is tangent to the circular trajectory, so that an air cyclone is formed in the hopper body.

5. The hopper according to claim 1, characterized in that, The air curtain assembly includes a second fan and a first baffle plate connected to the second gas duct. The first baffle plate is disposed above the second gas duct, and the second gas duct has a plurality of spaced strip-shaped air outlets.

6. The hopper according to claim 1, characterized in that, The air curtain assembly is arranged adjacent to the sealing assembly. The air curtain assembly also includes a second nozzle disposed below the second gas pipe. The second nozzle is used to spray water mist to clean the sealing assembly.

7. The hopper according to claim 6, characterized in that, The air curtain assembly also includes a second shield for protecting the second nozzle, the second shield being disposed above the second nozzle.

8. The hopper according to claim 5, characterized in that, Two air curtain components are provided, and the two air curtain components are respectively provided on two opposite inner walls of the hopper body.

9. The hopper according to claim 1, characterized in that, The sealing assembly includes a horizontally movable cover plate and a drive motor. A gear is provided on the output shaft of the drive motor, and a horizontally extending rack is provided on the cover plate that can mesh with the gear.

10. The hopper according to claim 9, characterized in that, The edge of the cover plate is provided with a gas filter membrane to fill the gap between the edge of the cover plate and the edge of the feed inlet.

11. The hopper according to claim 1, characterized in that, The hopper also includes a dust concentration detection sensor disposed above the feed inlet and a position detection sensor disposed at the edge of the feed inlet. The position detection sensor is used to detect whether all the material has entered the hopper body.

12. A ship unloader, characterized in that, Includes the hopper described in any one of claims 1-11.

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