A device for preventing backflow of powder

Abstract

The utility model relates to a kind of powder backflow prevention devices, including storage bin and filter box, the side fixed mounting of storage bin has feed pipe, fixed mounting is connected with pipe between storage bin and filter box, the other side fixed mounting of filter box has exhaust pipe, the front of filter box is installed with box door, box door is fixedly connected with filter box by bolt, the side installation of box door has filter assembly, filter assembly includes coarse filter plate and fine filter plate, the inside installation of filter box has the anti-backflow component of preventing powder backflow.The utility model can carry out multistage interception to powder by the coarse filter plate and fine filter plate of filter assembly, avoid powder with gas through exhaust pipe and directly discharge, reduce the air pollution caused by powder drift, solve the installation and dismounting structure of existing filter screen more complex, usually need to dismount with the aid of tool, lead to the cleaning, replacement process of filter plate is complicated, consume more time and manpower, affect filtration effect.

Description

Technical Field

[0001] This utility model relates to the field of powder production technology, and in particular to a device for preventing powder backflow. Background Technology

[0002] In industries such as chemical, pharmaceutical, and food processing, powder handling is a common and critical step. During the transportation, storage, and processing of powders, dust is easily generated, which not only affects the production environment but may also pose safety hazards. Therefore, effectively managing and controlling the flow of powders and preventing dust diffusion and backflow is crucial for ensuring production safety and improving product quality.

[0003] Existing devices require the use of filter screens to filter powder and prevent it from polluting the environment through exhaust pipes. However, their installation and disassembly structures are relatively complex and usually require tools for assembly and disassembly. This makes the cleaning and replacement of filter plates cumbersome, consumes a lot of time and manpower, and affects the filtration effect. Utility Model Content

[0004] In view of the technical problem that existing devices require the use of filter screens to filter powder and prevent the powder from being discharged through the exhaust pipe and polluting the environment, but their installation and disassembly structure is relatively complex and usually requires the use of tools, which makes the cleaning and replacement of filter plates cumbersome, consumes a lot of time and manpower, and affects the filtration effect, this utility model provides a powder backflow prevention device.

[0005] The technical solution adopted by this utility model is: a powder backflow prevention device, including a storage bin and a filter box. A feed pipe is fixedly installed on one side of the storage bin, and a connecting pipe is fixedly installed between the storage bin and the filter box. An exhaust pipe is fixedly installed on the other side of the filter box. A door is installed on the front of the filter box, and the door is fixedly connected to the filter box by bolts. A filter assembly is installed on one side of the door. The filter assembly includes a coarse filter plate and a fine filter plate. An anti-backflow component is installed inside the filter box to prevent powder backflow. The coarse and fine filter plates of the filter assembly can intercept the powder in multiple stages, preventing the powder from being directly discharged through the exhaust pipe with the gas, reducing air pollution caused by powder dispersion, and playing an important role in protecting the environment. The anti-backflow component can prevent the powder from flowing back during the conveying process, ensuring the stability and directionality of the powder conveying.

[0006] Furthermore, the inner surface of the door has two mounting grooves. Mounting plates that fit into the mounting grooves are fixedly installed on one side of both the coarse and fine filter plates. First springs are fixedly installed inside the upper and lower sides of each mounting plate. A snap-fit ​​block is fixedly installed at one end of each of the two first springs. The two snap-fit ​​blocks pass through the upper and lower sides of the mounting plate and are slidably connected to it. The inner walls of the mounting grooves have slots on the upper and lower sides that fit into the snap-fit ​​blocks. Fixing is achieved simply by the engagement of the snap-fit ​​blocks and slots, making operation convenient and greatly shortening the replacement and cleaning time of the filter plates, ensuring the filtration efficiency of the filter assembly, and facilitating later maintenance and upkeep.

[0007] Furthermore, a limiting plate is fixedly installed on one side of each of the two locking blocks. The limiting plate is slidably connected inside the mounting plate, which can limit the movement range of the locking blocks. This prevents the locking blocks from falling out of the mounting plate under the action of the first spring, ensuring the stability of the locking blocks and the locking slots.

[0008] Furthermore, both the front and rear sides of the snap-fit ​​block are sloped, and the side closer to the mounting plate is wider. The sloped surface can guide the snap-fit ​​block to retract smoothly under the squeezing action, reducing the resistance during installation and making the installation process smoother and less strenuous.

[0009] Furthermore, the anti-backflow assembly includes a sliding plate and a convex plate. The convex plate is fixedly installed on one side of the sliding plate, and the diameter of the convex plate is the same as the inner diameter of the connecting pipe. Slide grooves are provided on both the upper and lower sides of the filter box. The upper and lower sides of the sliding plate are slidably connected to the slide grooves on both sides respectively. Two fixing rods are fixedly installed inside the slide grooves. Both fixing rods penetrate the sliding plate and are slidably connected to the sliding plate. A second spring is fixedly installed on the surface of both fixing rods. The second spring can automatically push the sliding plate to reset according to the pressure change, realizing the automatic control of the anti-backflow function.

[0010] Furthermore, a sealing ring is fixedly installed at one end of the connecting pipe near the filter box. The sealing ring can fill the gap between the convex plate and the connecting pipe, significantly enhancing the sealing between the two, further preventing powder from flowing back from the gap, improving the anti-backflow effect, and ensuring the stability of the device operation.

[0011] Furthermore, both the storage silo and the filter box are fixedly equipped with discharge pipes at their bottoms, and valves are fixedly installed on the surface of the discharge pipes to facilitate the discharge of powder.

[0012] The beneficial effects of this utility model are: This invention utilizes a coarse and fine filter plate in its filter assembly to intercept powder in multiple stages, preventing powder from being directly discharged through the exhaust pipe with the gas. This reduces air pollution caused by powder dispersion and plays an important role in protecting the environment. It also solves the problem that the installation and disassembly of existing filters are relatively complex, usually requiring tools for assembly and disassembly, which makes the cleaning and replacement of filter plates cumbersome, time-consuming, and labor-intensive, thus affecting the filtration effect.

[0013] Secondly, this utility model can prevent the backflow of powder during the conveying process by using an anti-backflow component, thus ensuring the stability and directionality of powder conveying. Attached Figure Description

[0014] Figure 1 This is an overall drawing of the present invention; Figure 2 This is an internal view of the filter box of this utility model; Figure 3 This is an enlarged view of point A of this utility model; Figure 4 This is a view of the inner surface of the door of this utility model; Figure 5 This is a structural view of the anti-backflow component of this utility model.

[0015] The following are marked in the diagram: 1. Storage bin; 2. Filter box; 3. Feed pipe; 4. Connecting pipe; 5. Exhaust pipe; 6. Box door; 7. Filter assembly; 701. Coarse filter plate; 702. Fine filter plate; 703. Mounting groove; 704. Mounting plate; 705. First spring; 706. Snap-fit ​​block; 707. Snap-fit ​​groove; 708. Limiting plate; 8. Anti-backflow assembly; 801. Sliding plate; 802. Protruding plate; 803. Slide groove; 804. Fixing rod; 805. Second spring; 806. Sealing ring; 9. Discharge pipe; 10. Valve. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 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.

[0018] The following is in conjunction with the appendix Figures 1-5 The present invention will be further described below.

[0019] In order to solve the problems existing in the background technology, this application proposes the following technical solution: a device for preventing powder backflow.

[0020] The specific technical solution includes a storage silo 1 and a filter box 2. A feed pipe 3 is fixedly installed on one side of the storage silo 1, and a connecting pipe 4 is fixedly installed between the storage silo 1 and the filter box 2. An exhaust pipe 5 is fixedly installed on the other side of the filter box 2. A door 6 is installed on the front of the filter box 2, and the door 6 is fixedly connected to the filter box 2 by bolts. A filter assembly 7 is installed on one side of the door 6. The filter assembly 7 includes a coarse filter plate 701 and a fine filter plate 702. An anti-backflow assembly 8 is installed inside the filter box 2 to prevent powder backflow. The coarse filter plate 701 and the fine filter plate 702 of the filter assembly 7 can intercept the powder in multiple stages, preventing the powder from being directly discharged through the exhaust pipe 5 with the gas, reducing air pollution caused by powder dispersion, and playing an important role in protecting the environment. The anti-backflow assembly 8 can prevent the powder from backflowing during the conveying process, ensuring the stability and directionality of the powder conveying.

[0021] Reference Figures 1 to 4As shown, the inner surface of the door 6 has two mounting grooves 703. Mounting plates 704 that fit into the mounting grooves 703 are fixedly installed on one side of both the coarse filter plate 701 and the fine filter plate 702. First springs 705 are fixedly installed inside the upper and lower sides of the mounting plates 704. A snap-fit ​​block 706 is fixedly installed at one end of each of the two first springs 705. The two snap-fit ​​blocks 706 pass through the upper and lower sides of the mounting plates 704 and are slidably connected to them. The inner walls of the mounting grooves 703 have snap-fit ​​blocks on both the upper and lower sides that fit into the snap-fit ​​blocks 706. The mounting plate 707 has a slot 707, and a limiting plate 708 is fixedly installed on one side of each of the two snap-fit ​​blocks 706. The limiting plate 708 is slidably connected inside the mounting plate 704. Both the front and rear sides of the snap-fit ​​block 706 are sloped, and the side closer to the mounting plate 704 is wider. When the mounting plate 704 is inserted into the mounting slot 703, the snap-fit ​​block 706 is compressed and contracts due to the sloped design, and the first spring 705 is compressed. When it is in place, the first spring 705 returns to its original position, the snap-fit ​​block 706 pops out and snaps into the slot 707, and the limiting plate 708 prevents the snap-fit ​​block 706 from falling off, thus completing the fixation. During disassembly, pull the coarse filter plate 701 or the fine filter plate 702 outward, and the sloped surface of the snap-fit ​​block 706 contracts again under force, allowing the coarse filter plate 701 or the fine filter plate 702 to be quickly removed for cleaning or replacement, ensuring filtration efficiency.

[0022] Reference Figure 1 and Figure 5As shown, the anti-backflow assembly 8 includes a sliding plate 801 and a convex plate 802. The convex plate 802 is fixedly installed on one side of the sliding plate 801, and the diameter of the convex plate 802 is the same as the inner diameter of the connecting pipe 4. Slide grooves 803 are provided on both the upper and lower sides of the filter box 2. The upper and lower sides of the sliding plate 801 are slidably connected to the slide grooves 803 on both sides, respectively. Two fixing rods 804 are fixedly installed inside the slide grooves 803. Both fixing rods 804 penetrate the sliding plate 801 and are slidably connected to it. Second springs are fixedly installed on the surfaces of both fixing rods 804. A sealing ring 806 is fixedly installed at one end of the connecting pipe 4 near the filter box 2. A discharge pipe 9 is fixedly installed at the bottom of both the storage silo 1 and the filter box 2. A valve 10 is fixedly installed on the surface of the discharge pipe 9. During normal conveying, the pressure on the storage silo 1 side is greater than that on the filter box 2 side. This pressure difference pushes the sliding plate 801 to slide away from the connecting pipe 4 along the sliding grooves 803 on both sides of the filter box 2. The sliding plate 801 moves along the fixed rod 804 and compresses the second spring 805, causing the convex plate 802 to separate from the connecting pipe 4, forming a passage for the powder to pass through. When the pressure on the filter box 2 side is greater than that on the storage silo 1 side, resulting in a reverse pressure difference, the elastic potential energy of the second spring 805 is released, pushing the sliding plate 801 back to its original position. Under the combined action of the reverse pressure and the spring force, the convex plate 802 tightly adheres to the sealing ring 806 at the end of the connecting pipe 4. Since the diameter of the convex plate 802 is the same as the inner diameter of the connecting pipe 4, and with the sealing effect of the sealing ring 806, the pipe can be completely blocked, preventing the powder from flowing back from the filter box 2 to the storage silo 1 under the reverse pressure.

[0023] To ensure that those skilled in the art can fully understand the technical solution, this application provides the following overall overview: In use, the powder enters the storage silo 1 through the feed pipe 3. When the pressure on the side of the storage silo 1 is greater than that on the side of the filter box 2, the powder in the storage silo 1 moves towards the filter box 2 through the connecting pipe 4 under the action of the pressure difference. The pressure difference pushes the sliding plate 801 to slide away from the connecting pipe 4 along the sliding grooves 803 on the upper and lower sides of the filter box 2. The sliding plate 801 moves along the fixed rod 804 and compresses the second spring 805. The convex plate 802 separates from the connecting pipe 4, and the powder passes through smoothly. The powder first flows through the coarse filter plate 701, where larger particles of impurities are intercepted. The remaining powder continues to pass through the fine filter plate 702, where smaller particles of impurities are further filtered. After filtration, the purified gas is discharged through the exhaust pipe 5. When the conveying stops, the elastic potential energy of the second spring 805 is released, pushing the sliding plate 801 to reset. Under the combined action of reverse pressure and spring force, the convex plate 802 tightly fits the sealing ring 806 at the end of the connecting pipe 4, completely blocking the pipe and preventing the powder from flowing back. Finally, the valve 10 of the discharge pipe 9 at the bottom of the storage bin 1 and the filter box 2 is opened to collect the powder. Finally, the bolts connecting the box door 6 and the filter box 2 are loosened, and the coarse filter plate 701 or fine filter plate 702 is pulled outward. The inclined surface of the locking block 706 is compressed under force, and it can be taken out for cleaning or replacement.

[0024] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0025] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A device for preventing powder backflow, characterized in that, The filter box includes a storage silo (1) and a filter box (2). A feed pipe (3) is fixedly installed on one side of the storage silo (1). A connecting pipe (4) is fixedly installed between the storage silo (1) and the filter box (2). An exhaust pipe (5) is fixedly installed on the other side of the filter box (2). A door (6) is installed on the front of the filter box (2). The door (6) is fixedly connected to the filter box (2) by bolts. A filter assembly (7) is installed on one side of the door (6). The filter assembly (7) includes a coarse filter plate (701) and a fine filter plate (702). An anti-backflow assembly (8) to prevent powder backflow is installed inside the filter box (2).

2. The anti-powder backflow device according to claim 1, characterized in that, The inner surface of the door (6) has two mounting grooves (703). One side of the coarse filter plate (701) and the fine filter plate (702) is fixedly installed with a mounting plate (704) that fits into the mounting groove (703). The upper and lower sides of the mounting plate (704) are fixedly installed with first springs (705). One end of each of the two first springs (705) is fixedly installed with a snap-fit ​​block (706). The two snap-fit ​​blocks (706) pass through the upper and lower sides of the mounting plate (704) and slide in connection with the mounting plate (704). The upper and lower sides of the inner wall of the mounting groove (703) are provided with slots (707) that fit into the snap-fit ​​blocks (706).

3. The anti-powder backflow device according to claim 2, characterized in that, A limiting plate (708) is fixedly installed on one side of each of the two snap-fit ​​blocks (706), and the limiting plate (708) is slidably connected inside the mounting plate (704).

4. The anti-powder backflow device according to claim 3, characterized in that, The front and rear sides of the snap-fit ​​block (706) are both sloped, and the side closer to the mounting plate (704) is wider.

5. The anti-powder backflow device according to claim 1, characterized in that, The anti-backflow assembly (8) includes a sliding plate (801) and a convex plate (802). The convex plate (802) is fixedly installed on one side of the sliding plate (801). The diameter of the convex plate (802) is the same as the inner diameter of the connecting pipe (4). The filter box (2) has grooves (803) on both the upper and lower sides. The upper and lower sides of the sliding plate (801) are slidably connected to the grooves (803) on both sides respectively. Two fixing rods (804) are fixedly installed inside the grooves (803). The two fixing rods (804) penetrate the sliding plate (801) and are slidably connected to the sliding plate (801). The surfaces of the two fixing rods (804) are fixedly installed with second springs (805).

6. The anti-powder backflow device according to claim 1, characterized in that, A sealing ring (806) is fixedly installed at one end of the connecting pipe (4) near the filter box (2).

7. The anti-powder backflow device according to claim 1, characterized in that, The bottom of both the storage bin (1) and the filter box (2) is fixedly equipped with a discharge pipe (9), and a valve (10) is fixedly installed on the surface of the discharge pipe (9).

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