A dust removal and anti-static hood for powder feeding process

Abstract

This utility model relates to the field of environmental protection equipment technology, and discloses a dust removal and anti-static evaporation hood for powder feeding processes. The device includes a hood body, a first connecting pipe, a suction pipe, a second connecting pipe, a dust collection box, and a fan. Its key feature is that it further includes an anti-clogging component disposed within the first connecting pipe and a check valve component disposed within the second connecting pipe. The anti-clogging component includes a filter screen, a rotating frame, a scraper abutting against the filter screen, and a motor driving the rotating frame. The check valve component includes a fixed frame with a passageway, a check valve block slidably engaged with the fixed frame, a sliding column connected to the check valve block, and a second spring for resetting. This utility model, by incorporating the anti-clogging component, achieves automatic scraping and cleaning of the filter screen, avoiding pipe blockage and ensuring dust removal efficiency. By incorporating the check valve component, it effectively prevents dust backflow from the dust collection box after the fan stops, avoiding secondary pollution, making the device stable and reliable in operation, and achieving high cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology, and in particular to a dust removal and anti-static evaporation hood for powder feeding process. Background Technology

[0002] In many industrial production fields such as chemical, pharmaceutical, food, and new materials, the feeding, mixing, and transfer of powdered materials are extremely common process steps. During these processes, fine powder particles can easily become airborne and disperse into the surrounding environment, posing a potential threat to the health of operators, polluting the production environment, and, under certain conditions, some combustible dusts may even pose an explosion hazard.

[0003] To control dust dispersion, current technologies typically employ a dust collection hood above the feed inlet, using negative pressure generated by a fan to draw dust-laden air into a filtration and dust removal system. This method effectively captures most of the airborne dust and is currently the mainstream dust control approach.

[0004] However, existing dust collection devices have revealed significant shortcomings in practical use. During prolonged continuous operation, a large amount of fine powder quickly adheres to and accumulates on the filter screen at the dust inlet, gradually causing clogging. Once the filter screen is clogged, it directly increases the air resistance in the suction path, significantly reduces suction power, and drastically reduces the dust collection efficiency at the feed inlet. To restore performance, operators must frequently stop the machine and manually clean the filter screen, which not only interrupts the production process but also increases additional labor intensity and maintenance costs.

[0005] Furthermore, when a batch of work is completed or the equipment needs to be temporarily shut down, the fan stops operating, and the negative pressure in the entire pipeline disappears. At this time, the dust already collected in the rear dust collection box can easily backflow under the influence of gravity or the disturbance of residual airflow in the pipeline, and escape back to the work site through the suction pipe, causing secondary pollution and rendering the previous dust removal work futile. This structural defect leads to incomplete cleanliness control during the start-up and shutdown of existing dust removal devices. To address this issue, a dust removal and anti-static escape hood for the powder feeding process is proposed. Utility Model Content

[0006] In view of the problems in the existing dust removal devices used in the powder feeding process, such as the filter screen being easily clogged by dust, resulting in a decrease in dust removal efficiency, and the collected dust easily flowing back after the fan stops, causing secondary pollution, this utility model aims to provide a dust removal and anti-static evaporation hood for the powder feeding process with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a dust removal and anti-static evaporation hood for powder feeding process, including: evaporation hood body, first connecting pipe, dust suction pipe, second connecting pipe, dust collection box and fan; and anti-blocking component and check valve component installed in the pipeline.

[0008] The anti-clogging component includes a hollow filter screen, a rotating frame coaxially arranged with the filter screen, a scraper fixed to the rotating frame and abutting against the outer wall of the filter screen, and a dual-head motor for driving the rotating frame to rotate.

[0009] Furthermore, the check valve assembly includes a fixed frame with a passage, a check valve block that slides with the fixed frame to open and close the passage, a sliding column that is fixedly connected to the check valve block, and a second spring sleeved on the sliding column.

[0010] The anti-clogging component is installed between the vent hood body and the suction pipe connected by the first connecting pipe, and the anti-backflow component is installed between the suction pipe and the dust collection box connected by the second connecting pipe. The two ends of the second spring abut against the internal structure of the fixing frame and the sliding column, respectively. Through the structural combination of the above components, an automated dust removal system with self-cleaning and anti-backflow functions is formed.

[0011] Preferably, the anti-clogging component further includes a limiting plate and a first spring; the scraper is fixed to the limiting plate, the limiting plate is slidably mounted on the rotating frame, and the first spring is disposed between the rotating frame and the limiting plate, and applies an elastic force to the limiting plate to make the scraper adhere to the filter screen.

[0012] Preferably, the rotating frame is driven by the dual-head motor to rotate around the central axis of the filter screen, and the scraper slides along the circumference of the outer wall of the filter screen.

[0013] Preferably, the check valve assembly further includes a bracket fixed inside the fixing frame and a fixing column fixed to the bracket; the sliding column is slidably fitted onto the inner wall of the fixing column.

[0014] Preferably, a limiting block is fixed on the sliding column, and the limiting block is slidably disposed inside the fixed column.

[0015] Furthermore, the second spring is located between the limiting block and the end wall of the fixing post.

[0016] Preferably, the air inlet of the fan is connected to the dust collection box, and the air outlet of the fan is used to discharge the purified gas.

[0017] Preferably, the lower part of the evaporation hood body is provided with a feeding port for powder to be fed in.

[0018] This utility model has the following beneficial effects: 1. This utility model, by setting an anti-clogging component and using a dual-head motor to drive the rotating frame, thereby driving the scraper to continuously rotate and scrape the outer wall of the filter screen, solves the problem that the filter screen of the dust removal device in the prior art is easily clogged by dust, resulting in a decrease in dust removal efficiency and the need for frequent manual cleaning. It achieves the technical effect of automatically cleaning the filter screen, preventing clogging, and ensuring the long-term stable and efficient operation of the dust removal system.

[0019] 2. This utility model solves the problem of reduced cleaning effect caused by gaps between the traditional scraper and the filter screen after long-term wear. It achieves the technical effect of automatically compensating for scraper wear, ensuring that it always fits tightly against the filter screen surface, thus extending the effective service life of the equipment and reducing maintenance costs.

[0020] 3. This utility model, by setting a check valve component, uses the airflow pressure when the fan is turned on to push the check valve block to open the passage, and uses the rebound force of the second spring to drive the check valve block to reset and block the passage after the fan is turned off. This solves the problem in the prior art that dust collected in the dust collection box can easily flow back through the pipeline after the dust removal device stops working, causing secondary pollution. It achieves the technical effect of automatic sealing of the pipeline after the device is turned off, effectively preventing dust backflow and ensuring the cleanliness of the working environment. Attached Figure Description

[0021] Figure 1 This is a perspective view of a dust removal and anti-static evaporation hood for powder feeding process proposed in this utility model; Figure 2 This is a schematic diagram of the main body of a dust removal and anti-static evaporation hood for powder feeding process proposed in this utility model. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the dust collection pipe of a dust removal and anti-static evaporation hood for the powder feeding process proposed in this utility model. Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0022] Legend: 1. Escape hood body; 2. Anti-clogging component; 201. Filter screen; 202. Dual-head motor; 203. Rotating frame; 204. Scraper; 205. Limiting plate; 206. First spring; 3. Check valve component; 301. Fixing frame; 302. Bracket; 303. Fixing column; 304. Sliding column; 305. Limiting block; 306. Second spring; 307. Check valve block; 4. First connecting pipe; 5. Suction pipe; 6. Second connecting pipe; 7. Dust collection box; 8. Fan. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] Example:

[0025] Please refer to Figures 1 to 5 This utility model provides a dust removal and anti-static evaporation hood for the powder feeding process, which aims to solve the problems in the prior art where the filter screen 201 of the dust removal device is easily clogged by dust and dust backflow pollution occurs after the fan 8 is turned off.

[0026] like Figure 1 As shown, the dust removal and anti-static hood used in the powder feeding process establishes a complete dust removal air path, which includes a main body 1, a first connecting pipe 4, a suction pipe 5, a second connecting pipe 6, a dust collection box 7, and a fan 8. The lower part of the main body 1 of the hood has a feeding port for powder feeding. The main body 1 of the hood is connected to one end of the suction pipe 5 through the first connecting pipe 4. The other end of the suction pipe 5 is connected to the dust collection box 7 through the second connecting pipe 6. The air inlet of the fan 8 is connected to the dust collection box 7 to provide suction power for the entire air path. The air outlet of the fan 8 is used to discharge the purified gas. On this basic frame, an anti-clogging component 2 and a check valve component 3 are also specially set. The anti-clogging component 2 is set in the pipe of the first connecting pipe 4 to filter the sucked dust-laden gas and prevent clogging. The check valve component 3 is set in the pipe of the second connecting pipe 6 to prevent the dust in the dust collection box 7 from flowing back after the fan 8 stops working.

[0027] Please refer to Figure 2 and Figure 3The anti-clogging component 2 is described in detail below. The anti-clogging component 2 includes a hollow filter screen 201, a dual-head motor 202, a rotating frame 203 coaxially arranged with the filter screen 201, and a scraper 204. The dual-head motor 202 drives the rotating frame 203 to rotate, and the rotating frame 203 rotates around the central axis of the filter screen 201. The scraper 204 is fixed to the rotating frame 203 and always abuts against the outer wall of the filter screen 201, so that when the rotating frame 203 rotates, the scraper 204 can move along the outer wall of the filter screen 201. The scraper 204 is circumferentially slid to perform scraping and cleaning. To ensure that the scraper 204 can still fit tightly against the filter screen 201 after wear, the anti-clogging component 2 further includes a limiting plate 205 and a first spring 206. The scraper 204 is fixedly connected to the limiting plate 205, and the limiting plate 205 is slidably mounted on the rotating frame 203. The first spring 206 is disposed between the rotating frame 203 and the limiting plate 205 and applies a continuous elastic force to the limiting plate 205. This elastic force ensures that the scraper 204 always fits tightly against the surface of the filter screen 201.

[0028] Please refer to Figure 4 and Figure 5 The check valve assembly 3 is described in detail below. The check valve assembly 3 includes a fixed frame 301 that defines the internal passage, a check block 307, a sliding post 304 fixedly connected to the check block 307, and a second spring 306. The check block 307 is slidably engaged with the fixed frame 301 to open and close the internal passage of the fixed frame 301. A bracket 302 is fixedly connected inside the fixed frame 301. A hollow fixed post 303 is fixedly connected to the bracket 302. The sliding post 304 is slidably engaged with the inner wall of the fixed post 303. A limiting block 305 is also fixedly connected to the sliding post 304. The limiting block 305 is slidably disposed inside the fixed post 303. The second spring 306 is sleeved on the sliding post 304, and its specific position is between the limiting block 305 and the end wall of the fixed post 303. The two ends of the second spring 306 abut against the internal structure of the fixed frame 301 and the sliding post 304, respectively, to push the sliding post 304 to reset when there is no airflow.

[0029] To achieve effective filtration and unidirectional transport of dust-laden gas, the core of the technical solution in this embodiment is that the evacuation hood organically connects the evacuation hood body 1, the dust suction pipe 5, and the dust collection box 7 in series through the first connecting pipe 4 and the second connecting pipe 6. Furthermore, the aforementioned anti-blocking component 2 and check valve component 3 form a specific structural integration relationship with their respective connecting pipes.

[0030] Please refer to the following carefully. Figure 1 The core integrated structure will be described in detail below: The two ends of the first connecting pipe 4 are sealed to the outlet of the fume hood body 1 and the inlet of the suction pipe 5, respectively. The anti-clogging component 2 is integrated inside the pipe of the first connecting pipe 4. The filter screen 201 inside it faces the airflow direction from the fume hood body 1 and is used to perform primary filtration of the intake airflow. The scraper 204 on the outer wall of the filter screen 201 is driven by the dual-head motor 202 to continuously rotate and scrape, ensuring the unobstructed flow of the pipe.

[0031] Meanwhile, the two ends of the second connecting pipe 6 are respectively sealed to the outlet of the suction pipe 5 and the inlet of the dust collection box 7. The check valve assembly 3 is set inside the pipe of the second connecting pipe 6, located upstream of the dust collection box 7. The check valve block 307 inside it can automatically open according to the airflow pressure generated by the fan 8, and automatically reset and seal the pipe under the action of the second spring 306 when the fan 8 stops. This structural layout, which integrates the anti-blocking and check valve function modules into the upstream and downstream pipes respectively, ensures the automation and high reliability of the entire dust removal process from dust filtration to final collection.

[0032] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, to achieve the automatic compensation function of scraper 204 after wear and tear from long-term use, refer to Figure 3 The anti-clogging component 2 further includes a limiting plate 205 and a first spring 206. The scraper 204 is fixedly connected to the limiting plate 205. The limiting plate 205 is slidably mounted on the rotating frame 203. The first spring 206 is disposed between the rotating frame 203 and the limiting plate 205 and applies a continuous elastic force to the limiting plate 205, causing the scraper 204 to adhere to the surface of the filter screen 201.

[0033] As a specific motion implementation method, the dual-head motor 202 drives the rotating frame 203 to rotate around the central axis of the filter screen 201, thereby driving the scraper 204 fixed on the rotating frame 203 to slide stably along the outer wall of the filter screen 201, so as to achieve scraping and cleaning of the attached dust.

[0034] As a preferred internal support structure, refer to Figure 5 The sliding column 304 provides stable guidance for the reciprocating motion. The fixing frame 301 of the check component 3 is fixedly connected to the bracket 302, and the fixing column 303 is fixedly connected to the bracket 302. The sliding column 304 slides against the hollow inner wall of the fixing column 303.

[0035] As a further limitation on the reset mechanism of check component 3, refer to Figure 5A limiting block 305 is fixedly connected to the outer wall of the sliding column 304. The limiting block 305 is slidably disposed inside the fixed column 303. The second spring 306 is precisely disposed between the limiting block 305 and the end wall of the fixed column 303, forming a spring reset module with a stable structure and timely response.

[0036] As a preferred option for the overall gas path layout, referring to Figure 1 The air inlet of the fan 8 is connected to the dust collection box 7. The fan 8 is located at the end of the dust removal air path and is used to discharge the purified gas from the air outlet.

[0037] As for the specific arrangement of the dust source capture structure, refer to Figure 1 The lower part of the evacuation hood body 1 is provided with a feeding port, which is placed directly above the powder feeding operation point during actual use.

[0038] The working principle of this utility model's dust removal and anti-static evaporation hood used in the powder feeding process is as follows: When powder feeding is performed, the blower 8 is started first. The operation of the blower 8 creates a negative pressure zone inside the main body 1 of the evacuation hood, which draws in the dust and air raised during the feeding process through the first connecting pipe 4. When the airflow enters the anti-clogging component 2, the filter screen 201 first intercepts and filters the larger impurities. At the same time, the dual-head motor 202 drives the rotating frame 203 to rotate. The rotating frame 203 drives the scraper 204 to continuously scrape along the outer wall of the filter screen 201, scraping off the dust attached to the surface of the filter screen 201 and preventing the filter screen 201 from clogging. If the scraper 204 wears during use, the first spring 206 will push the limit plate 205, which in turn pushes the scraper 204, so that it always keeps in close contact with the outer wall of the filter screen 201.

[0039] The airflow, after initial filtration, carries finer dust particles through the suction pipe 5 and the second connecting pipe 6. When it enters the check valve assembly 3, the pressure of the airflow pushes the check valve block 307. The check valve block 307 causes the sliding column 304 to slide on the inner wall of the fixed column 303. The limiting block 305 on the sliding column 304 moves accordingly and compresses the second spring 306. At this time, the passage of the check valve assembly 3 is opened, and the dust is smoothly transported into the dust collection box 7 for collection, completing the entire dust removal process.

[0040] After the powder feeding operation is completed and the blower 8 is turned off, the airflow pressure in the pipeline disappears. Under the action of the rebound force of the second spring 306, the second spring 306 pushes the limit block 305 to reset. The limit block 305 drives the sliding column 304 to reset, and finally makes the check block 307 tightly fit with the passage of the fixed frame 301, sealing the pipeline. Through the synergistic effect of the check component 3, this utility model effectively solves the problem of collected dust backflow and pollution caused by the shutdown of the blower 8 in the prior art.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A dust removal and antistatic evacuation hood for powder feeding process, comprising an evacuation hood body (1), a dust suction pipe (5) connected to the evacuation hood body (1) via a first connecting pipe (4), a dust collection box (7) connected to the dust suction pipe (5) via a second connecting pipe (6), and a fan (8). Its features are, The escape shroud also includes: An anti-clogging component (2) is installed in the pipeline of the first connecting pipe (4). The anti-clogging component (2) includes a hollow filter screen (201), a rotating frame (203) coaxially arranged with the filter screen (201), a scraper (204) fixed to the rotating frame (203) and abutting against the outer wall of the filter screen (201), and a double-headed motor (202) for driving the rotating frame (203) to rotate. And, a check valve assembly (3) is provided in the pipeline of the second connecting pipe (6). The check valve assembly (3) includes a fixed frame (301) with a passage, a check valve block (307) that slides with the fixed frame (301) to open and close the passage, a sliding column (304) that is fixedly connected to the check valve block (307), and a second spring (306) sleeved on the sliding column (304). The two ends of the second spring (306) respectively abut against the internal structure of the fixed frame (301) and the sliding column (304).

2. The dust removal and anti-static evaporation hood for powder feeding process according to claim 1, characterized in that, The anti-clogging component (2) further includes a limiting plate (205) and a first spring (206); the scraper (204) is fixed to the limiting plate (205), the limiting plate (205) is slidably mounted on the rotating frame (203), and the first spring (206) is disposed between the rotating frame (203) and the limiting plate (205), and applies an elastic force to the limiting plate (205) to make the scraper (204) adhere to the filter screen (201).

3. The dust removal and anti-static evaporation hood for powder feeding process according to claim 1 or 2, characterized in that, The rotating frame (203) is driven by the dual-head motor (202) to rotate around the central axis of the filter screen (201), and the scraper (204) slides along the outer circumference of the filter screen (201).

4. The dust removal and anti-static evaporation hood for powder feeding process according to claim 1, characterized in that, The check valve assembly (3) further includes a bracket (302) fixed inside the fixed frame (301) and a fixed column (303) fixed to the bracket (302); the sliding column (304) is slidably engaged with the inner wall of the fixed column (303).

5. The dust removal and anti-static evaporation hood for powder feeding process according to claim 4, characterized in that, A limiting block (305) is fixed on the sliding column (304), and the limiting block (305) is slidably disposed inside the fixed column (303).

6. The dust removal and anti-static evaporation hood for powder feeding process according to claim 5, characterized in that, The second spring (306) is located between the limiting block (305) and the end wall of the fixing post (303).

7. The dust removal and anti-static evaporation hood for powder feeding process according to claim 1, characterized in that, The air inlet of the fan (8) is connected to the dust collection box (7), and the air outlet of the fan (8) is used to discharge the purified gas.

8. The dust removal and anti-static evaporation hood for powder feeding process according to claim 1, characterized in that, The lower part of the evaporation hood body (1) is provided with a feeding port for powder to be fed in.

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