A dust removal device for pharmaceutical and chemical industries used in safety engineering

Abstract

This invention relates to the field of dust removal equipment technology, and more particularly to a dust removal device for pharmaceutical and chemical environmental protection used in safety engineering. This invention provides a dust removal device for pharmaceutical and chemical environmental protection used in safety engineering capable of cleaning residual dust. The device includes a dust collector and an inlet pipe, etc. The inlet pipe is connected to the lower right side of the dust collector, and is connected to both the dust collector and an external exhaust port. It also includes a scraping mechanism and a spraying mechanism. The inner wall of the dust collector is equipped with a scraping mechanism for cleaning residual dust on the inner wall of the inlet pipe, and the scraping mechanism is equipped with a spraying mechanism for spraying water onto the dust on the inner wall of the inlet pipe. By moving the scraper to the left, this invention can scrape the dust adsorbed on the upper and lower sides of the inner wall of the inlet pipe to the left, thereby cleaning the dust on the inner wall of the inlet pipe and facilitating dust removal.

Description

Technical Field

[0001] This invention relates to the field of dust removal equipment technology, and in particular to a dust removal device for pharmaceutical and chemical environmental protection used in safety engineering. Background Technology

[0002] In the pharmaceutical manufacturing process, the dust produced is often flammable. To improve safety, dust removal is necessary, and it also helps prevent dust pollution of the surrounding environment, thus achieving environmental protection goals.

[0003] Currently, dust collectors are used to treat exhaust gases. First, the dust collector's inlet pipe is connected to the exhaust pipe. The exhaust gas will drift into the dust collector through the inlet pipe, where it will remove dust. Then, the dust-removed gas will be discharged. During the dust removal process, a lot of dust will be adsorbed on the inner wall of the dust collector's inlet pipe. After long-term use, a lot of dust will accumulate on the inner wall of the inlet pipe. Existing dust collectors are unable to clean the residual dust, thus affecting the dust removal effect and causing the exhaust gas to be discharged without being fully dust-removed.

[0004] To address the aforementioned shortcomings, we have developed a safe dust removal device for pharmaceutical and chemical industries that can effectively remove residual dust. Summary of the Invention

[0005] To overcome the shortcomings of existing dust collectors, which are unable to clean residual dust and thus affect the dust removal efficiency, resulting in the emission of exhaust gas without sufficient dust removal, this invention provides a safe engineering, pharmaceutical, and chemical environmental dust removal device capable of cleaning residual dust.

[0006] A dust removal device for pharmaceutical and chemical environmental protection in safety engineering includes a dust collector, an inlet pipe, and an exhaust pipe. The inlet pipe is connected to the lower right side of the dust collector and is connected to the dust collector and an external exhaust port. The exhaust pipe is connected to the upper left side of the dust collector and is connected to the dust collector. The device also includes a scraping mechanism and a spraying mechanism. The inner wall of the dust collector is provided with a scraping mechanism for cleaning the dust remaining on the inner wall of the inlet pipe, and the scraping mechanism is provided with a spraying mechanism for spraying water onto the dust on the inner wall of the inlet pipe.

[0007] Optionally, the scraping mechanism includes a circular connecting frame, an air bladder, a connecting column, an air pump, a cylinder, and scrapers. The cylinder is connected to the middle of the left wall inside the dust collector. The connecting column is rotatably connected to the cylinder's telescopic rod. The air pump is connected to the left side of the connecting column, and the circular connecting frame is connected to the right side of the connecting column. An air bladder is installed on the circular connecting frame and is connected to the air pump. Scrapers are connected to both the upper and lower sides of the air bladder. The scrapers are in contact with the upper and lower sides of the inner wall of the air inlet pipe. When the scrapers move to the left, they scrape the dust on the inner wall of the air inlet pipe to the left, thus cleaning the dust on the inner wall of the air inlet pipe.

[0008] Optionally, the spraying mechanism includes a spray head, a drain pipe, a water pump, and a water tank. The spray head is connected to the right side of the connecting column, and the water pump is connected to the left side of the connecting column. The drain pipe is connected to the rear side of the water pump. Both the water pump and the spray head are connected to the drain pipe. The water tank is connected to the lower rear side of the dust collector. The water tank has a built-in water pipe at the front right side. The water pipe on the water tank is connected to the water pump. The water pump delivers water from the water tank to the spray head through the drain pipe. The spray head sprays water onto the dust on the inner wall of the air inlet pipe to prevent dust from flying around.

[0009] Optionally, it also includes an adjustment mechanism for adjusting the scraper to fit against the front and rear sides of the inner wall of the air inlet pipe. The adjustment mechanism includes a large gear, a small gear, and a motor. The motor is connected to the middle of the left wall of the dust collector. The motor is located above the cylinder. The small gear is connected to the output shaft of the motor. The large gear is connected to the right side of the connecting column. The large gear meshes with the small gear. Through the cooperation of the small gear and the large gear, the scraper is driven to rotate and fit against the front and rear sides of the inner wall of the air inlet pipe, so as to scrape the dust in the air inlet pipe from multiple directions.

[0010] Optionally, it also includes a limiting mechanism for limiting the connecting column. The limiting mechanism includes a limiting spring and a limiting ball. The left side of the connecting column has a limiting groove evenly opened along the circumferential direction. The upper and lower sides of the right side of the cylinder telescopic rod are connected to limiting springs. The sides of the limiting springs that are close to each other are connected to limiting balls. The limiting balls are all inserted into the limiting grooves of the connecting column.

[0011] Optionally, it also includes a wiping mechanism for wiping dust on the left side of the scraper. The wiping mechanism includes a wedge block, a slide rail, a wiping component, and a return spring. The wedge block is connected to the middle of the cylinder extension rod. Both the upper and lower parts of the wedge block are inclined to the right inner side. The upper and lower parts of the left side of the air intake pipe are connected to the slide rail. The wiping component is slidably connected to the slide rail. The right side of the wiping component is in contact with the left side of the scraper. The side of the wiping component that is away from each other is connected to the inner wall of the slide rail with a return spring to control the scraper to rotate. The wiping component wipes the dust on the left side of the scraper.

[0012] Optionally, it also includes a filter mechanism for filtering the gas after dust removal. The filter mechanism includes a movable part and a filter screen. The movable part is slidably connected through the upper part of the exhaust pipe. Two filter screens are snapped into the lower left part of the movable part. The two filter screens are symmetrically arranged on the left and right sides. The filter screens are made of activated carbon.

[0013] Optionally, it also includes a cover sleeve, with the left side of the intake pipe snapped with a cover sleeve.

[0014] The beneficial effects of the present invention are: 1. By moving the scraper to the left, the present invention can scrape the dust adsorbed on the upper and lower sides of the inner wall of the air intake pipe to the left, thereby cleaning the dust on the inner wall of the air intake pipe and facilitating the dust removal of the dust collector.

[0015] 2. The present invention can spray water onto the dust on the inner wall of the air intake pipe through the spray head, which prevents the dust from flying around and makes it easier for the scraper to remove the dust from the inner wall of the air intake pipe.

[0016] 3. By rotating the scraper 90 degrees, the present invention enables the scraper to clean the dust on both sides of the inner wall of the intake pipe, thereby cleaning the dust on the inner wall of the intake pipe from all directions and improving the cleaning effect.

[0017] 4. By limiting the cooperation between the limiting spring and the limiting ball, the present invention can limit the scraper by the connecting column, the circular connecting frame and the air bag, so as to prevent the scraper from rotating when it encounters impurities, which is conducive to the scraper cleaning the dust on the inner wall of the air intake pipe.

[0018] 5. The present invention utilizes a wiping component to wipe the left side of the rotating scraper, thereby cleaning the dust on the left side of the scraper and facilitating the scraper to remove dust.

[0019] 6. When the gas after dust removal passes through the filter, the filter can filter out harmful gases in the gas, thus preventing the emitted gas from polluting the surrounding environment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a partial three-dimensional structural cross-sectional view of the present invention.

[0022] Figure 3 This is a three-dimensional structural diagram of the scraping mechanism of the present invention.

[0023] Figure 4 This is a three-dimensional structural diagram of the spraying mechanism of the present invention from a first perspective.

[0024] Figure 5 This is a two-dimensional structural diagram of the spraying mechanism of the present invention from a second perspective.

[0025] Figure 6 This is a three-dimensional structural diagram of the adjustment mechanism of the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the limiting mechanism of the present invention.

[0027] Figure 8 This is a three-dimensional structural diagram of the wiping mechanism of the present invention from a first perspective.

[0028] Figure 9 This is a two-dimensional structural diagram of the wiping mechanism of the present invention from a second perspective.

[0029] Figure 10This is a first-view three-dimensional structural diagram of the filtering mechanism of the present invention.

[0030] Figure 11 This is a two-dimensional structural diagram of the filtering mechanism of the present invention from a second perspective.

[0031] The markings in the attached diagram are as follows: 1_Dust collector, 2_Inlet pipe, 3_Exhaust pipe, 4_Scraping mechanism, 41_Circular connecting frame, 42_Airbag, 43_Connecting column, 44_Air pump, 45_Cylinder, 46_Scraper, 5_Spraying mechanism, 51_Spray head, 52_Drain pipe, 53_Water pump, 54_Water tank, 6_Adjusting mechanism, 61_Large gear, 62_Small gear, 63_Motor, 7_Limiting mechanism, 71_Limiting spring, 72_Limiting ball, 8_Wiping mechanism, 81_Wedge block, 82_Slide rail, 83_Wiping component, 84_Reset spring, 9_Filtering mechanism, 91_Moving component, 92_Filter screen, 93_Cover sleeve. Detailed Implementation

[0032] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0033] Example 1

[0034] A dust removal device for pharmaceutical and chemical environmental protection in safety engineering, such as Figure 1 and Figure 2 As shown, it includes a dust collector 1, an air inlet pipe 2, an exhaust pipe 3, a scraping mechanism 4, and a spraying mechanism 5. The air inlet pipe 2 is connected to the lower right side of the dust collector 1 and is connected to the dust collector 1. The air inlet pipe 2 is also connected to the external exhaust port. The exhaust pipe 3 is connected to the upper left side of the dust collector 1 and is connected to the dust collector 1. The inner wall of the dust collector 1 is equipped with a scraping mechanism 4, which can clean the dust remaining on the air inlet pipe 2. The scraping mechanism 4 is equipped with a spraying mechanism 5, which can spray water onto the dust on the inner wall of the air inlet pipe 2.

[0035] like Figure 2 and Figure 3 As shown, the scraping mechanism 4 includes a circular connecting frame 41, an air bag 42, a connecting column 43, an air pump 44, an air cylinder 45, and scrapers 46. The air cylinder 45 is installed in the middle of the left wall inside the dust collector 1. The connecting column 43 is rotatably connected to the telescopic rod of the air cylinder 45. The air pump 44 is connected to the left side of the connecting column 43, and the circular connecting frame 41 is connected to the right side of the connecting column 43. The air bag 42 is installed on the circular connecting frame 41 and is connected to the air pump 44. There are two scrapers 46, which are fixed to the upper and lower sides of the air bag 42 respectively. The scrapers 46 are in contact with the upper and lower sides of the inner wall of the air inlet pipe 2.

[0036] like Figure 2 , Figure 4 and Figure 5As shown, the spraying mechanism 5 includes a spray head 51, a drain pipe 52, a water pump 53, and a water tank 54. The spray head 51 is connected to the right side of the connecting column 43, the water pump 53 is connected to the left side of the connecting column 43, and the drain pipe 52 is connected to the rear side of the water pump 53. Both the water pump 53 and the spray head 51 are connected to the drain pipe 52. The lower rear side of the dust collector 1 is connected to the water tank 54. The front right side of the water tank 54 has its own water pipe, and the water pipe on the water tank 54 is connected to the water pump 53.

[0037] This device can be used to remove dust from exhaust gases emitted by pharmaceutical and chemical plants. Initially, the inlet pipe 2 is connected to the external exhaust port. Then, the dust collector 1 is turned on. When the exhaust gas enters the dust collector 1 through the inlet pipe 2, the dust collector 1 will remove dust from the exhaust gas. After the dust removal, the gas is discharged from the exhaust pipe 3. This process removes dust from the exhaust gas before discharge. After prolonged use, the inner wall of the inlet pipe 2 will accumulate a lot of dust. Therefore, it is necessary to clean the dust residue on the inner wall of the inlet pipe 2. First, the air pump 44 is turned on. The air pump 44 draws out the gas from the air bag 42, causing the air bag 42 to contract. Then, the scraper 46 moves inward. The scraper 46 separates from the left side of the inner wall of the intake pipe 2. Then, the cylinder 45 is activated, causing its extension rod to extend. This extension moves the connecting column 43, air pump 44, circular connecting frame 41, airbag 42, and scraper 46 to the right, positioning the scraper 46 on the right side inside the intake pipe 2. The air pump 44 then inflates the airbag 42, causing it to expand. This expansion moves the scraper 46 outward, bringing it into contact with the upper and lower right sides of the inner wall of the intake pipe 2. Finally, the cylinder 45 retracts, causing the connecting column 43, air pump 44, and circular connecting frame to retract. 41. The airbag 42 and scraper 46 move to the left. The scraper 46 moves to the left to scrape the dust on the upper and lower sides of the inner wall of the air intake pipe 2 to the left. This can clean the dust adhering to the inner wall of the air intake pipe 2. When cleaning the dust, in order to avoid dust pollution, water can be sprayed on the dust on the inner wall of the air intake pipe 2 before the scraper 46 removes the dust. First, water is injected into the water tank 54, and then the water pump 53 is turned on. The water pump 53 operates to draw water out of the water tank 54, and then pumps the water into the drain pipe 52 and the spray head 51, and then sprays it out through the spray head 51. When the connecting column 43 moves to the right, the connecting column 43 will also drive the spray head 51 to move to the right, which can make the air intake... All the dust on the inner wall of pipe 2 is sprayed onto it. When the connecting column 43 moves to the far right, the water pump 53 is turned off. Then, when the scraper 46 moves to the left, the dust on the inner wall of the intake pipe 2 will not float around randomly, avoiding the need for repeated scraping due to the dust floating around randomly. This makes it easier for the scraper 46 to scrape the dust on the inner wall of the intake pipe 2. After the exhaust gas dust removal is completed, the dust collector 1 is turned off. Repeating the above operation will allow the scraper 46 to scrape the dust adsorbed on the inner wall of the intake pipe 2 to the left, cleaning the dust on the inner wall of the intake pipe 2, making the dust removal effect of the dust collector 1 better. In addition, the spray head 51 can spray water onto the dust on the inner wall of the intake pipe 2, which makes it easier for the scraper 46 to scrape the dust on the inner wall of the intake pipe 2.

[0038] Example 2

[0039] Based on Example 1, such as Figure 2 and Figure 6As shown, it also includes an adjustment mechanism 6, which includes a large gear 61, a small gear 62 and a motor 63. The motor 63 is bolted to the middle of the left wall inside the dust collector 1 and is located above the cylinder 45. The small gear 62 is connected to the output shaft of the motor 63 through a coupling. The large gear 61 is connected to the right side of the connecting column 43, and the large gear 61 meshes with the small gear 62.

[0040] When it is necessary to thoroughly scrape away the dust inside the intake pipe 2, the adjustment mechanism 6 can be used. After the scraper 46 moves to the left to scrape away the dust on the upper and lower sides of the inner wall of the intake pipe 2, the motor 63 is turned on, causing the output shaft of the motor 63 to drive the small gear 62 to rotate 90 degrees, and then drive the large gear 61 to rotate 90 degrees. This, in turn, rotates the scraper 46 90 degrees through the connecting column 43, the circular connecting frame 41, and the airbag 42. Then, the scraper 46 is controlled to move inward, and after moving inward, the scraper 46 moves to the right side of the inside of the intake pipe 2. Then, the scraper 46 is controlled to move outward, so that the scraper 46 is in contact with the front and rear sides of the right side of the inner wall of the intake pipe 2. Subsequently, when the scraper 46 moves to the left, the scraper 46 will scrape away the dust on the front and rear sides of the inner wall of the intake pipe 2. In this way, the dust inside the intake pipe 2 can be thoroughly scraped away, thereby improving the cleaning effect.

[0041] like Figure 2 and Figure 7 As shown, it also includes a limiting mechanism 7, which includes a limiting spring 71 and a limiting ball 72. The left side of the connecting column 43 has multiple limiting grooves along the circumferential direction. There are two limiting springs 71, which are connected to the upper and lower sides of the right side of the telescopic rod of the cylinder 45 respectively. There are two limiting balls 72, which are fixed to the side of the limiting springs 71 that are close to each other. The limiting balls 72 are both inserted into the limiting grooves of the connecting column 43.

[0042] When the dust adsorbed on the inner wall of the intake pipe 2 accumulates into large dust particles, these large dust particles are more stubborn. When the scraper 46 scrapes the dust off the inner wall of the intake pipe 2, the large dust particles will squeeze the scraper 46, causing it to rotate and become misaligned with some of the dust, making it difficult to clean some of the dust. To avoid this phenomenon, a limiting mechanism 7 can be used. When the connecting column 43 rotates, the slot on the connecting column 43 will also rotate with it. When the slot on the connecting column 43 rotates away from the limiting ball 72, the connecting column 43 will push the limiting ball 72 outward, compressing the limiting spring 71. When the slot rotates to align with the limiting ball 72, the limiting spring 71 rebounds, causing the limiting ball 72 to move inward and engage in the slot on the connecting post 43. This limits the connection post 43, preventing it from rotating and thus preventing the scraper 46 from rotating. Subsequently, when the scraper 46 encounters large dust particles during dust removal, the connecting post 43, the circular connecting frame 41, the airbag 42, and the scraper 46 will not rotate due to the cooperation of the limiting spring 71 and the limiting ball 72. This prevents incomplete cleaning of the dust inside the air intake pipe 2, and the scraper 46 will also remove large dust particles, resulting in a better cleaning effect.

[0043] like Figure 2 , Figure 8 and Figure 9 As shown, it also includes a wiping mechanism 8, which includes a wedge block 81, a slide rail 82, a wiping component 83, and a return spring 84. The wedge block 81 is connected to the middle of the telescopic rod of the cylinder 45. Both the upper and lower parts of the wedge block 81 are inclined to the right inner side. There are two slide rails 82, which are respectively fixed to the upper and lower parts of the left side of the air intake pipe 2. The wiping component 83 is slidably connected to each slide rail 82. The right side of the wiping component 83 is in contact with the left side of the scraper 46. The side of the wiping component 83 that is far away from each other is connected to the inner wall of the slide rail 82 with a return spring 84.

[0044] After prolonged use, the left side of the scraper 46 will accumulate a lot of dust. The wiping mechanism 8 can then wipe away this dust. When the scraper 46 rotates, the left side of the scraper 46 comes into contact with the right side of the wiping component 83, causing the wiping component 83 to wipe away the dust on the left side of the scraper 46, thus cleaning it. Subsequently, when the cylinder 45 extends, it also moves the wedge block 81 to the right. As the wedge block 81 moves closer to the wiping component 83, it pushes the wiping component 83 towards itself. When the side furthest from the scraper is squeezed, the return spring 84 is compressed. At this time, the slide rail 82 will scrape away the dust on the right side of the wiping component 83. When the cylinder 45 telescopic rod drives the wedge block 81 to move to the left, and the wedge block 81 moves away from the wiping component 83, the wiping component 83 moves to the side closer to the scraper under the elastic action of the return spring 84. In summary, the wiping component 83 can be used to wipe away the dust on the left side of the scraper 46 and clean the left side of the scraper 46. This prevents the dust adsorbed on the left side of the scraper 46 from falling into the intake pipe 2 and needing to be cleaned again, which helps to maintain the effect of 46 scraping away the dust on the inner wall of the intake pipe 2.

[0045] like Figure 2 , Figure 10 and Figure 11 As shown, it also includes a filter mechanism 9, which includes a movable part 91 and a filter screen 92. The movable part 91 is slidably connected to the upper part of the exhaust pipe 3. Two filter screens 92 are snapped into the lower left part of the movable part 91. The two filter screens 92 are symmetrically arranged on the left and right sides. The material of the filter screen 92 is activated carbon.

[0046] like Figure 10 As shown, it also includes a cover sleeve 93. The cover sleeve 93 is snapped onto the left side of the air intake pipe 2. The cover sleeve 93 can close the left side of the air intake pipe 2 to prevent external dust from entering the air intake pipe 2 when it is not in use.

[0047] When dust removal is required, first pull the cover 93 off to the left. When the dust-removed gas is discharged from the exhaust pipe 3, it passes through the filter screen 92. Since the filter screen 92 is made of activated carbon, it will absorb and filter the harmful gases in the gas. Then the filtered gas is discharged. After long-term use, when the filter screen 92 needs to be replaced, move the moving part 91 and the filter screen 92 to the left so that the filter screen 92 moves out of the air inlet pipe 2. Then the filter screen 92 can be removed for replacement. When the new filter screen 92 is stuck in the lower left part of the moving part 91, move the moving part 91 and the new filter screen 92 to the right. After the dust removal is completed, put the cover 93 back on the left side of the exhaust pipe 3. In summary, the dust-removed gas can be filtered again, and the harmful gases in the gas can be filtered to avoid affecting the surrounding environment.

[0048] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A dust removal device for pharmaceutical and chemical environmental protection in safety engineering, comprising a dust collector (1), an inlet pipe (2), and an exhaust pipe (3), wherein the inlet pipe (2) is connected to the lower right side of the dust collector (1), the inlet pipe (2) is connected to the dust collector (1), and the inlet pipe (2) is connected to an external exhaust port; and the exhaust pipe (3) is connected to the upper left side of the dust collector (1), the exhaust pipe (3) is connected to the dust collector (1), characterized in that, It also includes a scraping mechanism (4) and a spraying mechanism (5). The inner wall of the dust collector (1) is provided with a scraping mechanism (4) for cleaning the dust remaining on the inner wall of the air inlet pipe (2). The scraping mechanism (4) is provided with a spraying mechanism (5) for spraying water onto the dust on the inner wall of the air inlet pipe (2). The scraping mechanism (4) includes a circular connecting frame (41), an air bag (42), a connecting column (43), an air pump (44), an air cylinder (45), and a scraper (46). The air cylinder (45) is connected to the middle of the left wall of the dust collector (1). The connecting column (43) is rotatably connected to the telescopic rod of the air cylinder (45). The air pump (44) is connected to the left side of the connecting column (43). The circular connecting frame (41) is connected to the right side of the connecting column (43). An air bag (42) is installed on the circular connecting frame (41). The air bag (42) is connected to the air pump (44). Scrapers (46) are connected to both the upper and lower sides of the air bag (42). The scraper (46) is attached to the upper and lower sides of the inner wall of the air inlet pipe (2). The scraper (46) moves to the left to scrape the dust on the inner wall of the air inlet pipe (2) to the left, thus cleaning the dust on the inner wall of the air inlet pipe (2). The spraying mechanism (5) includes a spray head (51), a drain pipe (52), a water pump (53) and a water tank (54). The right side of the connecting column (43) is connected to the spray head (51), the left side of the connecting column (43) is connected to the water pump (53), the rear side of the water pump (53) is connected to the drain pipe (52), the water pump (53) and the spray head (51) are both connected to the drain pipe (52), the lower rear side of the dust collector (1) is connected to the water tank (54), the front right side of the water tank (54) has its own water pipe, the water pipe on the water tank (54) is connected to the water pump (53), the water pump (53) transmits the water in the water tank (54) to the spray head (51) through the drain pipe (52), the spray head (51) sprays the water onto the dust on the inner wall of the air inlet pipe (2) to prevent the dust from flying around.

2. The dust removal device for pharmaceutical and chemical environmental protection in safety engineering according to claim 1, characterized in that, It also includes an adjustment mechanism (6) for adjusting the scraper (46) to fit against the front and back sides of the inner wall of the air inlet pipe (2). The adjustment mechanism (6) includes a large gear (61), a small gear (62) and a motor (63). The motor (63) is connected to the middle of the left wall of the dust collector (1). The motor (63) is located above the cylinder (45). The small gear (62) is connected to the output shaft of the motor (63). The large gear (61) is connected to the right side of the connecting column (43). The large gear (61) meshes with the small gear (62). Through the cooperation of the small gear (62) and the large gear (61), the scraper (46) is driven to rotate and fit against the front and back sides of the inner wall of the air inlet pipe (2) to scrape the dust in the air inlet pipe (2) from multiple directions.

3. The dust removal device for pharmaceutical and chemical environmental protection in safety engineering according to claim 2, characterized in that, It also includes a limiting mechanism (7) for limiting the connecting column (43). The limiting mechanism (7) includes a limiting spring (71) and a limiting ball (72). The left side of the connecting column (43) is evenly provided with a limiting groove along the circumferential direction. The upper and lower sides of the right side of the cylinder (45) telescopic rod are connected to the limiting spring (71). The side of the limiting spring (71) that is close to each other is connected to the limiting ball (72). The limiting ball (72) is inserted into the limiting groove of the connecting column (43).

4. The dust removal device for pharmaceutical and chemical environmental protection in safety engineering according to claim 3, characterized in that, It also includes a wiping mechanism (8) for wiping the dust on the left side of the scraper (46). The wiping mechanism (8) includes a wedge block (81), a slide rail (82), a wiping component (83), and a return spring (84). The wedge block (81) is connected to the middle of the telescopic rod of the cylinder (45). The upper and lower parts of the wedge block (81) are inclined to the right inner side. The upper and lower parts of the left side of the air intake pipe (2) are connected to the slide rail (82). The wiping component (83) is slidably connected on the slide rail (82). The right side of the wiping component (83) is in contact with the left side of the scraper (46). The side of the wiping component (83) that is far away from each other is connected to the inner wall of the slide rail (82) with a return spring (84). The scraper (46) is controlled to rotate, and the wiping component (83) wipes the dust on the left side of the scraper (46).

5. A dust removal device for pharmaceutical and chemical environmental protection in safety engineering according to claim 4, characterized in that, It also includes a filter mechanism (9) for filtering the gas after dust removal. The filter mechanism (9) includes a movable part (91) and a filter screen (92). The upper part of the exhaust pipe (3) is slidably connected to the movable part (91). The lower left part of the movable part (91) is fitted with two filter screens (92). The two filter screens (92) are symmetrically arranged on the left and right sides. The material of the filter screen (92) is activated carbon.

6. A dust removal device for pharmaceutical and chemical environmental protection in safety engineering according to claim 5, characterized in that, It also includes a cover (93), and the left side of the air intake pipe (2) is fitted with a cover (93).

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