Grab ship unloader hopper dust removal device

Abstract

This invention discloses a dust removal device for a grab bucket ship unloader hopper, comprising a hopper, a baffle plate fixedly installed on the hopper's inlet, multiple conical plates at the top of the baffle plate, a pair of baffles at the opening of the baffle plate with a hinged door, and each baffle's opposite end rotatably connected to the hopper's end face. First water storage and filter boxes are fixedly connected to both sides of the vertical baffle plate of the hopper, and a second water storage and filter box is installed on the side wall of the hopper facing the baffle plate. Spray nozzles are installed on the side of the conical plates facing the hopper, and a water supply pipe is connected between the spray nozzles and the first water storage and filter boxes. A first water pump is installed on the water supply pipe. A water mist collection device is installed on the inner wall of the side of the baffle plate facing the baffle plate, and the water mist collection device is connected to the second water storage and filter box via a conduit. A return pipe is connected between each first water storage and filter box and the second water storage and filter box, and a second water pump is installed on the return pipe. This invention can reduce water waste.

Description

Technical Field

[0001] This invention relates to the field of grab unloader technology, and in particular to a dust removal device for the hopper of a grab unloader. Background Technology

[0002] With economic development and rapid port construction, the demand for ship unloaders is increasing. During the loading and unloading process, bulk cargo ship unloaders generate a large amount of dust, severely polluting the atmosphere. To protect the environment, dust removal devices must be installed at the hoppers of bulk cargo ship unloaders. Currently, the dust removal technologies used in bulk cargo loading and unloading systems are mainly divided into two categories: dry dust removal and wet dust removal. Dry dust removal is typically used for special chemical materials, such as sulfur and fertilizers; wet dust removal technology is more widely used and is commonly used for conventional materials, such as coal and ore. Wet dust removal systems are mainly divided into dry fog dust removal and water fog dust removal.

[0003] For example, CN111420497A discloses a dust removal device for the hopper of a grab unloader, belonging to the technical field of unloader equipment. It includes a frame with a vertically arranged hopper on it. Above the hopper are two side windbreaks and a liftable rear door. The two side windbreaks are located on either side of the rear door and are symmetrically arranged along the center line of the hopper. This combined dust removal mechanism simultaneously sprays and mists the area above the hopper. The combination of dry and wet mist provides a wider dust coverage, suppressing dust particles with diameters ranging from 5 to 500 μm, thus preventing dust from flying during grab feeding. Compared to the original single dry or water mist dust removal system, it offers more comprehensive dust suppression, lower energy consumption, and is more environmentally friendly. Dry mist or water mist spraying can also be used alone depending on specific working conditions, making it more widely applicable.

[0004] When using water mist for dust suppression, the water mist can effectively suppress dust, thus achieving the effect of dust removal. However, during the process of using water mist for dust suppression, if the wind is strong, the water mist will mix with the dust and escape outwards. To avoid pollution from the escaped dust, it is necessary to increase the water mist spraying, but increasing the water mist supply will lead to the waste of water resources. Therefore, the applicant proposes a dust removal device for the hopper of a grab bucket ship unloader to solve the above problems. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] To achieve the above objectives, this invention proposes a dust removal device for the hopper of a grab unloader, comprising a hopper. A semi-enclosed baffle plate with one side opening is fixedly installed around the inlet end face of the hopper. Multiple conical plates are inclined upwards and facing inwards from the top of the baffle plate. The ends of the conical plates opposite to the baffle plate form a clearance channel facing the hopper inlet. A pair of baffles are provided at the opening of the baffle plate, with the ends of each baffle rotatably connected to the end face of the hopper. Two fixedly connected components are located on the two sides of the hopper perpendicular to the baffles. A first water storage and filtration box is provided, and a second water storage and filtration box is provided on the side wall of the hopper facing the baffle. A nozzle is provided on the side of the cone plate facing the hopper. A water supply pipe is provided between the nozzle and the first water storage and filtration box. A first water pump is provided on the water supply pipe. A water mist collection device is provided on the inner wall of the side of the baffle facing the baffle. The water mist collection device is connected to the second water storage and filtration box through a conduit. A return pipe is provided between each first water storage and filtration box and the second water storage and filtration box. A second water pump is provided on the return pipe.

[0007] By setting up a water mist collection device, the present invention can collect and reuse water mist mixed with dust. Furthermore, through the coordinated filtration of the first and second water storage filter boxes, the dust in the water mist is filtered out, so that the water mist can be used as a water source and supplied to the nozzles again by the first water pump connected to the first water storage filter box through the water supply pipeline for spray dust suppression operation.

[0008] Optionally, both the first water storage filter box and the second water storage filter box include a first cavity and a second cavity arranged vertically, and a loose and porous partition is provided between the first cavity and the second cavity to filter impurities in the water.

[0009] Furthermore, the second cavity of the second water storage filter box is connected to the first cavities of the two first water storage filter boxes through the return pipe, and the second cavity of the first water storage filter box is connected to the water supply pipe.

[0010] Furthermore, each of the two opposing cone plates is provided with a support frame for fixing the nozzle on the side facing the hopper. The support frame is arranged in a horizontal direction, and the nozzle is fixedly installed on the support frame at equal intervals.

[0011] Furthermore, the side of the support frame where the nozzle is mounted is set with an arc-shaped sloping surface, and the thickness of the end of the support frame facing the water mist collection device is less than the height of the end of the support frame facing the baffle.

[0012] Furthermore, the water mist collection device includes a collection hole that penetrates through the wind baffle. A filter plate and a fan are fixedly arranged sequentially in the collection hole along the direction away from the baffle. A storage cover with a sealing buckle is fixedly attached to the outer wall of the wind baffle at the position corresponding to the collection hole. The storage cover has a storage outlet at one end of the fan. The storage outlet is connected to the second water storage filter box. The filter plate is flush with the inner wall of the wind baffle.

[0013] Furthermore, a cleaning assembly for cleaning the water mist collection device is provided on the inner wall of the side of the baffle facing the baffle. The cleaning assembly includes a support block that is slidably connected to the inner wall of the baffle. An active rod is fixedly connected to the support block along the direction towards the cleaning assembly. A scraper that abuts against the filter plate is rotatably connected to the center position of the filter plate facing the active rod. The length of the scraper is equal to the radius of the collection hole. The free end of the scraper is rotatably connected to the end of the active rod. A second motor is fixedly provided on the outer wall of the baffle at the position corresponding to the support block. The output end of the second motor passes through the center of the baffle and is fixedly connected to the support block.

[0014] Furthermore, a first motor for controlling the rotation of the baffle is provided on the feed inlet end wall of the hopper corresponding to the position of the baffle rotation end. The output end of the first motor is arranged perpendicular to the feed inlet end wall of the hopper, and the baffle is fixedly connected to the output end of the first motor. A trigger switch is provided on the outer surface of the baffle, and the trigger switch is electrically connected to the motor.

[0015] Furthermore, guide rails are provided on the inner walls of the two opposing wind deflectors along the direction perpendicular to the deflectors. An elastic arc plate is provided on the side of the deflector facing the guide rail. One end of the elastic arc plate is slidably connected to the guide rail, and the other end of the elastic arc plate is fixedly connected to the side of the deflector facing the guide rail. The two elastic arc plates are bent in a direction away from each other.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0018] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a rear-view stereoscopic diagram of the structure of the present invention;

[0020] Figure 3This is a top view of the structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the full cross-section of the structure of the present invention;

[0022] Figure 5 This is a partially enlarged schematic diagram of section A of the structure of the present invention;

[0023] Figure 6 This is a side sectional view of the structure of the present invention;

[0024] Figure 7 This is a partially enlarged schematic diagram of section B of the structure of the present invention;

[0025] Figure 8 This is a bottom view of the structure of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Hopper; 2. Baffle plate; 3. Conical plate; 4. Support frame; 5. Nozzle; 6. Baffle; 7. First motor; 8. Elastic arc plate; 9. Guide rail; 10. First water storage filter box; 11. Return pipe; 12. Water mist collection device; 1201. Fan; 1202. Filter plate; 13. Guide tube; 14. Second water storage filter box; 15. Return pipe; 16. Second motor; 17. Partition plate; 18. Support block; 19. Drive rod; 20. Scraper. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] This invention provides a dust removal device for the hopper of a grab unloader, which is described below in conjunction with... Figures 1 to 7 To elaborate in detail.

[0030] A dust removal device for a grab bucket unloader hopper 1 includes a hopper 1. A semi-enclosed windbreak plate 2 with one side opening is fixedly installed around the feed inlet end face of the hopper 1. Multiple conical plates 3 are inclined upwards and facing inwards from the top of the windbreak plate 2, forming a clearance channel directly opposite the feed inlet of the hopper 1. A pair of baffles 6 are provided at the opening of the windbreak plate 2, with each baffle 6 having a rotatable connection at its opposite end to the end face of the hopper 1. First water storage and filter boxes 10 are fixedly connected to the two sides of the hopper 1 perpendicular to the baffles 6. A second water storage and filter box 14 is provided on one side wall of the baffle 6. A nozzle 5 is provided on the side of the cone plate 3 facing the hopper 1. A water supply pipe is provided between the nozzle 5 and the first water storage and filter box 10. A first water pump is provided on the water supply pipe. A water mist collection device 12 is provided on the inner wall of the side of the baffle 2 facing the baffle 6. The water mist collection device 12 is connected to the second water storage and filter box 14 through a conduit 13. Each first water storage and filter box 10 is connected to the second water storage and filter box 14 by a return pipe 15 11. A second water pump is provided on the return pipe 15 11. Since the arrangement of the first water pump on the water supply pipe and the arrangement of the second water pump on the return pipe 15 11 can be arbitrary, as long as they serve the purpose of water supply, and the model and specifications of the water pumps used are not specifically required in this application, the specific shape and position of the first and second water pumps are not shown in the figure.

[0031] By setting up a water mist collection device 12, the present invention can collect and reuse water mist mixed with dust, and filter the dust in the water mist through the coordinated filtration of the first water storage filter box 10 and the second water storage filter box 14, so that the water mist can be used as a water source and supplied to the nozzle 5 through the water supply pipe by the first water pump connected to the first water storage filter box 10 for spray dust suppression operation again.

[0032] To facilitate the automatic opening and closing of the baffle 6 when the grab enters the space enclosed by the baffle 2 above the hopper 1, a first motor 7 is provided on the feed inlet end wall of the hopper 1 corresponding to the rotating end of the baffle 6 for controlling the rotation of the baffle 6. The output end of the first motor 7 is perpendicular to the feed inlet end wall of the hopper 1, and the baffle 6 is fixedly connected to the output end of the first motor 7. A trigger switch is provided on the outer surface of the baffle 6, and the trigger switch is electrically connected to the motor. When the grab touches the trigger switch, the trigger switch sends a working signal to the first motor 7 to control the first motor 7. After receiving the signal from the trigger switch, the controller of machine 7 sends a working command to the first motor 7. The first motor 7 opens the baffle 6 according to the controller's control. When the grab bucket is unloading, the contact position between the grab bucket and the trigger switch changes from the front to the side, but the grab bucket always remains in contact with the trigger switch. At this time, the baffle 6 maintains the open angle under the action of the first motor 7. After the grab bucket leaves, the grab bucket disengages from the trigger switch, and the trigger switch sends a reset signal to the first motor 7. After receiving the reset signal, the controller that controls the operation of the first motor 7 sends an action command to the first motor 7, and the first motor 7 drives the baffle 6 to reset.

[0033] Furthermore, guide rails 9 are provided on the inner walls of the two opposing baffles 2 along a direction perpendicular to the baffle 6. An elastic arc plate 8 is provided on the side of the baffle 6 facing the guide rail 9. The elastic arc plate 8 is made of a thin, elastic metal sheet. One end of the elastic arc plate 8 is slidably connected to the guide rail 9, and the other end is fixedly connected to the side of the baffle 6 facing the guide rail 9. The two elastic arc plates 8 are bent away from each other. When the baffle 6 deflects inward, it squeezes the elastic arc plate 8, causing the end of the elastic arc plate 8 to move along the guide rail 9 until it reaches the end of the guide rail 9. At this point, the head of the elastic arc plate 8 bends inward to form an arc-shaped concave surface. When the material flows inside the hopper 1, a vortex is formed at this curved surface, allowing dust to continue flowing along the arc plate and then flowing out from the end towards the collection device.

[0034] Since the arrangement of the nozzles 5 is directly related to the spraying of the water mist, in order to enhance the collection effect of the water mist collection device 12, support frames 4 for fixing the nozzles 5 are provided on the side of the pair of opposing cone plates 3 facing the hopper 1. The support frames 4 are arranged horizontally, and the nozzles 5 are fixed at equal intervals on the support frames 4. The side of the support frame 4 where the nozzles 5 are installed is arranged with an arc-shaped slope. The thickness of the end of the support frame 4 facing the water mist collection device 12 is less than the height of the end of the support frame 4 facing the baffle 6. Moreover, the arc-shaped slope is concave in the same direction as the elastic arc plate 8, so that the direction of the nozzles 5 is all pointing towards the collection device. In addition, the fan 1201 in the collection device blows air outward to the baffle 2, which increases the gas flow rate on the side of the hopper 1 near the collection device, and rapidly reduces the pressure in this area, thereby ensuring that the scattered dust quickly dissipates towards the fan 1201.

[0035] To recover water mist mixed with dust, the water mist collection device 12 includes a collection hole penetrating the baffle plate 2. A filter plate 1202 and a fan 1201 are sequentially fixed within the collection hole, arranged in a direction away from the baffle plate 6. A storage cover, sealed and fastened to the corresponding collection hole, is fixed to the outer wall of the baffle plate 2. One end of the storage cover has a storage outlet connected to the fan 1201, which is connected to a conduit 13. The other end of the conduit 13 is connected to a second water storage filter box 14. The filter plate 1202 is flush with the inner wall of the baffle plate 2. Under the action of the fan 1201, water mist sprayed towards the space enclosed by the hopper 1, the baffle plate 2, and the cone plate 3 is drawn into the collection hole. The water mist first passes through the filter plate 1202, which performs preliminary filtration of the dust adhering to the water mist, reducing the amount of larger dust particles that enter the second water storage filter box 14 along the conduit.

[0036] After the water mist enters the second water storage filter tank 14 along the pipe, it forms stored water. However, some dust particles, smaller than those filtered out by the filter plate 1202, still remain. To ensure that the stored water does not clog the nozzle 5 when sprayed again and can effectively adsorb dust, the stored water formed after the water mist enters the second water storage filter tank 14 needs to be filtered again. Therefore, both the first water storage filter tank 10 and the second water storage filter tank 14 include a first cavity and a second cavity arranged vertically. A loose, porous partition 17 is provided between the first cavity and the second cavity to filter impurities in the water. The second cavity of the second water storage filter tank 14 is connected to the first cavities of the two first water storage filter tanks 10 through the return pipe 15 11. The second cavity of the first water storage filter tank 10 is connected to the water supply pipe.

[0037] After the water mist enters the second water storage and filtration tank 14, it forms stored water. Under the action of gravity and the second water pump, the stored water in the first water storage and filtration tank 10 flows from the first cavity to the second cavity. After passing through a baffle 17 for filtration, the stored water enters the first cavity of the first water storage and filtration tank 10. Under the action of gravity and the first water pump, the stored water passes through another baffle 17 in the first water storage and filtration tank 10, completing another filtration. This multi-stage filtration of the stored water further ensures that the nozzle 5 will not clog when the stored water is sprayed out again, and that it has good adsorption capacity. In some embodiments, the pore size of the baffle 17 in the first water storage and filtration tank 10 is smaller than that of the baffle 17 in the second water storage and filtration tank 14, thus performing multi-stage filtration of the stored water and further improving the filtration effect.

[0038] To facilitate cleaning of the partition 17, in some embodiments, the partition 17 is detachable both inside the first water storage filter tank 10 and the second water storage filter tank 14. The bottom plates of both the first and second water storage filter tanks 10 and 14 can be completely disassembled without leakage during use. This allows for the disassembly of the first and second water storage filter tanks 10 and 14, enabling the installation or removal of the partition. Furthermore, to facilitate water replenishment, both the first and second water storage filter tanks 10 and 14 are equipped with water inlets, each with a detachable sealing cap.

[0039] Furthermore, considering that larger dust particles may accumulate and clog the filter plate 1202 after being filtered by the collection hole over a long period of time, a cleaning component for cleaning the water mist collection device 12 is provided on the inner wall of the baffle plate 2 on the side opposite to the baffle plate 6. The cleaning component includes a support block 18 that is slidably connected to the inner wall of the baffle plate 2. An active rod 19 is fixedly connected to the support block 18 along the direction towards the cleaning component. A scraper 20 that abuts against the filter plate 1202 is rotatably connected to the center of the end face of the filter plate 1202 facing the active rod 19. The length of the scraper 20 is equal to the radius of the collection hole. The free end of the scraper 20 is rotatably connected to the end of the active rod 19. A second motor 16 is fixedly provided on the outer wall of the baffle plate 2 at the position corresponding to the support block 18. The output end of the second motor 16 is set perpendicular to the baffle plate 2 and is fixedly connected to the center of the baffle plate 2 and the support block 18. When in use, the second motor 16 is started, which drives the active rod 19 on the side of the support block 18 to rotate, thereby driving the scraper 20 to move in a circular motion on the surface of the filter plate 1202 to achieve periodic cleaning and prevent it from clogging within a service cycle.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dust removal device for a grab bucket unloader hopper, comprising a hopper, wherein a semi-enclosed baffle plate with one side opening is fixedly disposed around the feed inlet end face of the hopper, and multiple conical plates are disposed inclined upwards and facing inwards from the top of the baffle plate, the ends of the multiple conical plates opposite to the baffle plate forming a clearance channel facing the feed inlet of the hopper, characterized in that, The wind deflector opening is equipped with a pair of baffles. The ends of each baffle, which are far apart from each other, are rotatably connected to the end face of the hopper. A first water storage and filter box is fixedly connected to the two sides of the hopper perpendicular to the baffles. A second water storage and filter box is provided on the side wall of the hopper facing the baffles. A nozzle is provided on the side of the cone plate facing the hopper. A water supply pipe is provided between the nozzle and the first water storage and filter box. A first water pump is provided on the water supply pipe. A water mist collection device is provided on the inner wall of the wind deflector facing the baffles. The water mist collection device is connected to the second water storage and filter box through a conduit. A return pipe is provided between each first water storage and filter box and the second water storage and filter box. A second water pump is provided on the return pipe. The water mist collection device includes a collection hole that penetrates through the wind baffle. A filter plate and a fan are fixedly arranged in sequence in the collection hole along the direction away from the baffle. A storage cover with a sealing buckle is fixed on the outer wall of the wind baffle at the position corresponding to the collection hole. The storage cover has a storage outlet at one end of the fan. The storage outlet is connected to the second water storage filter box. The filter plate is flush with the inner wall of the wind baffle. A cleaning assembly for cleaning the water mist collection device is provided on the inner wall of the side of the wind deflector facing the deflector. The cleaning assembly includes a support block that is slidably connected to the inner wall of the wind deflector. An active rod is fixedly connected to the support block along the direction towards the cleaning assembly. A scraper that abuts against the filter plate is rotatably connected to the center position of the end face of the filter plate facing the active rod. The length of the scraper is equal to the radius of the collection hole. The free end of the scraper is rotatably connected to the end of the active rod. A second motor is fixedly provided on the outer wall of the wind deflector at the position corresponding to the support block. The output end of the second motor passes through the wind deflector and is fixedly connected to the center of the support block. A first motor for controlling the rotation of the baffle is provided on the feed inlet end wall of the hopper corresponding to the position of the baffle rotation end. The output end of the first motor is perpendicular to the feed inlet end wall of the hopper, and the baffle is fixedly connected to the output end of the first motor. A trigger switch is provided on the outer surface of the baffle, and the trigger switch is electrically connected to the motor. Two wind deflectors facing each other have guide rails on their inner walls along a direction perpendicular to the deflector. Each deflector has an elastic arc plate on the side facing the guide rail. One end of the elastic arc plate is slidably connected to the guide rail, and the other end of the elastic arc plate is fixedly connected to the side of the deflector facing the guide rail. The two elastic arc plates are bent away from each other.

2. The dust removal device for the hopper of a grab unloader as described in claim 1, characterized in that, Both the first water storage filter box and the second water storage filter box include a first cavity and a second cavity arranged vertically. A loose and porous partition is provided between the first cavity and the second cavity to filter impurities in the water.

3. The dust removal device for the hopper of a grab unloader as described in claim 2, characterized in that, The second cavity of the second water storage filter box is connected to the first cavities of the two first water storage filter boxes through the return pipe, and the second cavity of the first water storage filter box is connected to the water supply pipe.

4. The dust removal device for the hopper of a grab unloader as described in claim 1, characterized in that, Each of the two opposing cone plates has a support frame for fixing the nozzle on the side facing the hopper. The support frame is arranged horizontally, and the nozzle is fixedly mounted on the support frame at equal intervals.

5. The dust removal device for the hopper of a grab unloader as described in claim 4, characterized in that, The side of the support frame where the nozzle is mounted is set with an arc-shaped sloping surface, and the thickness of the end of the support frame facing the water mist collection device is less than the height of the end of the support frame facing the baffle.

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