Feeding mechanism and negative pressure feeding equipment comprising same

Abstract

The utility model provides a feeding mechanism and a negative pressure feeding device including the same, the feeding mechanism comprises a feeding hopper, the feeding hopper is provided with a side wall, the side wall encloses to form a feeding cavity, the side wall comprises an inner layer plate and an outer layer plate, the inner layer plate and the outer layer plate are arranged at an interval to form a hollow cavity, and the inner layer plate and the outer layer plate are arranged in a staggered mode to form the feeding cavity. A dust suction opening communicated with the hollow cavity is formed in the position, close to an opening in the upper end of the feeding cavity, of the inner layer plate, and an air suction opening connected with external negative pressure equipment is formed in the outer layer plate. When the feeding mechanism is used, negative pressure is formed in the hollow cavity through external negative pressure equipment, when materials are fed, escaping dust can be sucked into the hollow cavity through the negative pressure through the dust suction openings in the inner layer plate, the sucked dust is collected again, and therefore the situation that a large amount of dust escapes when the materials are fed is avoided, and the service life of the materials is prolonged. Materials are wasted; and the working environment is polluted.

Description

Technical Field

[0001] This utility model relates to a feeding mechanism and a negative pressure feeding device including the same. Background Technology

[0002] When powder materials are fed into processing equipment, they are generally fed through a hopper. Conventional hoppers are mostly funnel-shaped, with a large opening at the top (where they contact the ton bag) and a small opening at the bottom (where they connect to the conveying pipe), resulting in a top-heavy structure. This can lead to significant dust emission during powder material feeding, wasting materials, polluting the surrounding work environment, and posing a threat to employees' occupational health. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects in the prior art where a large amount of dust is released when powder materials are fed, resulting in material waste and pollution of the working environment, and to provide a feeding mechanism and a negative pressure feeding device including the same.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] This utility model provides a feeding mechanism, including a feeding hopper, the feeding hopper having a side wall, the side wall enclosing a feeding cavity, the side wall including an inner plate and an outer plate, the inner plate and the outer plate being spaced apart to form a hollow cavity, the inner plate having a dust suction port communicating with the hollow cavity at the upper opening near the feeding cavity, and the outer plate having an air suction port connected to an external negative pressure device.

[0006] In this solution, by adopting the above structure, the feeding mechanism creates negative pressure in the hollow cavity through an external negative pressure device during use. When feeding materials, the escaping dust is sucked into the hollow cavity through the dust suction port on the inner plate by the negative pressure, so that the sucked-in dust is collected again, thereby avoiding the situation where a large amount of dust escapes when feeding materials, resulting in material waste and pollution of the working environment.

[0007] Preferably, there are multiple dust suction ports, which are spaced apart circumferentially along the feeding chamber.

[0008] In this solution, by setting up multiple dust suction ports, the escaped dust can be collected as much as possible.

[0009] Preferably, the upper end of the inner layer plate is provided with an outwardly folded annular outer edge plate, and the annular outer edge plate is connected to the upper end of the outer layer plate;

[0010] The lower end of the inner layer plate is closed to the outer layer plate, or an annular opening is formed between the lower end of the inner layer plate and the outer layer plate.

[0011] In this design, by sealing the lower end of the inner plate with the outer plate, the negative pressure inside the hollow cavity can be prevented from drawing large amounts of powder material into the cavity. Conversely, by forming an annular opening between the lower end of the inner plate and the outer plate, the material entering the hollow cavity can re-enter the hopper through this opening, preventing blockage and ensuring effective dust removal.

[0012] Preferably, the annular outer edge plate is provided with multiple dust suction ports.

[0013] In this design, multiple dust suction ports are provided on the annular outer edge plate to further enhance the dust removal effect and reduce dust dispersion.

[0014] Preferably, the feeding mechanism further includes a balancing filter element, which is installed on the outer layer plate and is used to filter external air before it enters the hollow cavity.

[0015] In this solution, by setting a balance filter element, it is possible to prevent the material bag from blocking the dust suction port when feeding materials, which would prevent external air from entering the hollow cavity and cause excessive negative pressure inside the hollow cavity. This can prevent the feeding hopper from deforming or the external negative pressure equipment from being overloaded and damaged.

[0016] This utility model also provides a negative pressure feeding device, which includes the feeding mechanism described above;

[0017] The negative pressure feeding device also includes a mixing cylinder, a cyclone separator and a blower. The feeding hopper and the cyclone separator are installed on the mixing cylinder. The feeding hopper is used to feed materials into the mixing cylinder.

[0018] The cyclone separator includes an air inlet, an air outlet, and a material outlet. The air inlet and the material outlet are both connected to the mixing cylinder. The air inlet is used to draw air from the mixing cylinder into the cyclone separator, and the material outlet is used to feed the material from the cyclone separator into the mixing cylinder. The air outlet is connected to the fan, and the fan is used to generate negative pressure inside the cyclone separator.

[0019] In this solution, the negative pressure feeding equipment uses a feeding mechanism to effectively prevent large amounts of dust from escaping during material feeding, thus avoiding material waste and pollution of the working environment. Simultaneously, the negative pressure feeding equipment utilizes a cyclone separator to extract gas from the mixing cylinder, preventing gas entering the mixing cylinder from affecting the quality of the fed or mixed materials. When the cyclone separator extracts gas from the mixing cylinder, some of the powder material extracted along with it is separated within the cyclone separator and then reintroduced into the mixing cylinder, preventing material waste.

[0020] Preferably, the air inlet is also connected to the air intake via a pipe.

[0021] In this scheme, the feeding mechanism and the cyclone separator share a common fan, which can save costs on the one hand, and on the other hand, the scattered dust can be collected again by the cyclone separator and sent back into the mixing cylinder.

[0022] Preferably, a pressure control valve is also provided between the air inlet and the pipe, and the pressure control valve is used to control the air pressure in the hollow cavity.

[0023] Preferably, a check valve is also provided between the air inlet and the pipe, the check valve being used to prevent materials and gas from flowing back into the hollow cavity.

[0024] Preferably, the check valve is located between the pneumatic control valve and the pipeline.

[0025] The positive and progressive effects of this utility model are as follows: When the feeding mechanism of this utility model is in use, a negative pressure is formed in the hollow cavity by an external negative pressure device. When feeding materials, the loose dust will be sucked into the hollow cavity through the dust suction port on the inner plate by the negative pressure, so that the sucked dust is collected again, thereby avoiding the situation that a large amount of dust will be released when feeding materials, resulting in material waste and pollution of the working environment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the feeding mechanism in an embodiment of the present invention.

[0027] Figure 2 This is a cross-sectional view of the feeding mechanism in an embodiment of this utility model.

[0028] Figure 3 This is a schematic diagram of the inner layer plate in another embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the negative pressure feeding device in an embodiment of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] Feeding mechanism 100, inner layer plate 110, inner layer plate body 111, annular outer edge plate 112, dust suction port 113, outer layer plate 120, outer layer plate body 121, cylindrical plate 122, hollow cavity 130, and balanced filter element 140;

[0032] Mixing cylinder 200;

[0033] Cyclone separator 300, air inlet 301, material outlet 302, air outlet 303;

[0034] Fan 400;

[0035] First pipeline 500;

[0036] 600 air pressure control valve;

[0037] Check valve 700;

[0038] Second pipeline 800;

[0039] Third pipeline 900. Detailed Implementation

[0040] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0041] like Figure 1-2 As shown, this utility model embodiment discloses a feeding mechanism 100, including a feeding hopper. The feeding hopper has a side wall, which encloses a feeding cavity. The side wall includes an inner plate 110 and an outer plate 120. A hollow cavity 130 is formed between the inner plate 110 and the outer plate 120 at intervals. A dust suction port 113 communicating with the hollow cavity 130 is provided at the upper opening of the inner plate 110 near the feeding cavity. An air suction port connected to an external negative pressure device is provided on the outer plate 120.

[0042] When in use, the feeding mechanism 100 creates negative pressure in the hollow cavity 130 through an external negative pressure device. When feeding materials, the loose dust is sucked into the hollow cavity 130 through the dust suction port 113 on the inner plate 110, so that the sucked dust is collected again, thereby avoiding the situation where a large amount of dust is released when feeding materials, resulting in material waste and pollution of the working environment.

[0043] There are multiple dust suction ports 113, which are spaced apart circumferentially along the feeding chamber. By providing multiple dust suction ports 113, the escaped dust can be collected as much as possible. In this embodiment, the multiple dust suction ports 113 are located near the upper edge of the feeding chamber and are evenly spaced along the circumference of the feeding chamber.

[0044] In this embodiment, the upper end of the inner layer plate 110 is provided with an outwardly folded annular outer edge plate 112, which is connected to the upper end of the outer layer plate 120; an annular opening is formed between the lower end of the inner layer plate 110 and the outer layer plate 120. Forming an annular opening between the lower end of the inner layer plate 110 and the outer layer plate 120 allows material entering the hollow cavity 130 to re-enter the feeding hopper through the annular opening, preventing blockage of the hollow cavity 130 and ensuring effective dust removal.

[0045] Specifically, such as Figure 2As shown, the inner layer plate 110 includes an inner layer plate body 111 and an annular outer edge plate 112, and the outer layer plate 120 includes an outer layer plate body 121 and a cylindrical plate 122. The outer layer plate 120 forms a conical structure with a larger opening at the top and a smaller opening at the bottom. The lower end of this conical structure is circumferentially sealed to the upper end of the cylindrical plate 122. The inner layer plate body 111 also forms a conical structure, and the inclination angle of the conical structure formed by the inner layer plate body 111 is greater than that of the conical structure formed by the outer layer plate body 121. The upper end of the inner layer plate body 111 is connected to the upper end of the outer layer plate body 121 through the annular outer edge plate 112, and the lower end of the inner layer plate body 111 extends downward beyond the connection point between the outer layer plate body 121 and the cylindrical plate 122.

[0046] In other embodiments, the lower end of the inner layer plate 110 is closed to the outer layer plate 120. If the lower end of the inner layer plate 110 is closed to the outer layer plate 120, the material entering the bottom of the feeding hopper can be prevented from being affected by the negative pressure in the hollow cavity 130, which would cause a large amount of powder material to be sucked into the hollow cavity 130 and affect the dust removal effect.

[0047] like Figure 3 As shown, in some other embodiments, a plurality of dust suction ports 113 may be provided on the annular outer edge plate 112. Providing a plurality of dust suction ports 113 on the annular outer edge plate 112 further enhances the dust removal effect and reduces dust dispersion.

[0048] The feeding mechanism 100 also includes a balancing filter element 140, which is installed on the outer plate 120. The balancing filter element 140 is used to filter external air before it enters the hollow cavity 130. By setting the balancing filter element 140, it is possible to prevent the material bag from blocking the dust suction port 113 when feeding materials, which would prevent external air from entering the hollow cavity 130 and cause excessive negative pressure inside the hollow cavity 130. This can prevent deformation of the feeding hopper or overload damage to the external negative pressure equipment.

[0049] like Figure 4As shown, this embodiment also provides a negative pressure feeding device, which includes the feeding mechanism 100 described above. The negative pressure feeding device also includes a mixing cylinder 200, a cyclone separator 300, and a blower 400. The feeding hopper and the cyclone separator 300 are installed on the mixing cylinder 200. The feeding hopper is used to feed materials into the mixing cylinder 200. The cyclone separator 300 includes an air inlet 301, an air outlet 303, and a discharge outlet 302. The air inlet 301 is connected to the mixing cylinder 200 through a second pipe 800 and is used to draw air from the mixing cylinder 200 into the cyclone separator 300. The discharge outlet 302 is connected to the mixing cylinder 200 and is used to feed materials from the cyclone separator 300 into the mixing cylinder 200. A valve is also provided at the discharge outlet 302 to control the opening and closing of the discharge outlet 302. The air outlet 303 is connected to the blower 400 through a third pipe 900, and the blower 400 is used to generate negative pressure inside the cyclone separator 300.

[0050] This negative pressure feeding device uses the feeding mechanism 100 to feed materials, effectively preventing the large-scale emission of dust during material feeding, which could lead to material waste and pollution of the working environment. Simultaneously, the negative pressure feeding device utilizes a cyclone separator 300 to extract gas from the mixing cylinder 200, preventing gas entering the mixing cylinder 200 from affecting the quality of the fed or mixed materials. When the cyclone separator 300 extracts gas from the mixing cylinder 200, some of the powder material extracted along with it is separated within the cyclone separator 300 and then reintroduced into the mixing cylinder 200, thus avoiding material waste.

[0051] In this embodiment, the air inlet 301 is also connected to the air intake through the first pipe 500. The feeding mechanism 100 and the cyclone separator 300 share a fan 400, which can save costs on the one hand, and on the other hand, the scattered dust can be collected again by the cyclone separator 300 and sent back into the mixing cylinder 200.

[0052] A pressure control valve 600 is also installed between the air inlet 301 and the pipeline. The pressure control valve 600 is used to control the air pressure inside the hollow cavity 130. A check valve 700 is also installed between the air inlet 301 and the pipeline. The check valve 700 is used to prevent materials or gas from flowing back into the hollow cavity 130. The check valve 700 is located between the pressure control valve 600 and the pipeline.

[0053] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A dosing mechanism comprising a dosing hopper having a side wall enclosing a dosing cavity, characterized in that, The sidewall includes an inner plate and an outer plate, with a hollow cavity formed between the inner plate and the outer plate. The inner plate has a dust suction port communicating with the hollow cavity at the upper opening near the feeding chamber, and the outer plate has an air suction port connected to an external negative pressure device.

2. The dosing mechanism of claim 1, wherein, There are multiple dust suction ports, which are spaced apart circumferentially along the feeding chamber.

3. The dosing mechanism of claim 1, wherein, The upper end of the inner layer plate is provided with an outwardly folded annular outer edge plate, and the annular outer edge plate is connected to the upper end of the outer layer plate; The lower end of the inner layer plate is closed to the outer layer plate, or an annular opening is formed between the lower end of the inner layer plate and the outer layer plate.

4. The dosing mechanism of claim 3, wherein, The annular outer edge plate is provided with multiple dust suction ports.

5. The dosing mechanism of claim 1, wherein, The feeding mechanism also includes a balancing filter element, which is installed on the outer plate and is used to filter external air before it enters the hollow cavity.

6. A negative pressure feeding apparatus characterized by comprising: The negative pressure feeding device includes a feeding mechanism as described in any one of claims 1-5; The negative pressure feeding device also includes a mixing cylinder, a cyclone separator and a blower. The feeding hopper and the cyclone separator are installed on the mixing cylinder. The feeding hopper is used to feed materials into the mixing cylinder. The cyclone separator includes an air inlet, an air outlet, and a material outlet. The air inlet and the material outlet are both connected to the mixing cylinder. The air inlet is used to draw air from the mixing cylinder into the cyclone separator, and the material outlet is used to feed the material from the cyclone separator into the mixing cylinder. The air outlet is connected to the fan, and the fan is used to generate negative pressure inside the cyclone separator.

7. The negative pressure feeding apparatus according to claim 6, wherein The air inlet is also connected to the air intake via a pipe.

8. The negative pressure feeding apparatus according to claim 7, wherein A pressure control valve is also provided between the air inlet and the pipe, and the pressure control valve is used to control the air pressure in the hollow cavity.

9. The negative pressure feeding apparatus according to claim 8, wherein A check valve is also provided between the air inlet and the pipe. The check valve is used to prevent materials and gases from flowing back into the hollow cavity.

10. The negative pressure feeding device as described in claim 9, characterized in that, The check valve is located between the pressure control valve and the pipeline.

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