A dust cover apparatus

Abstract

This application relates to the field of dust removal technology in production workshops, and provides a dust cover device, including: a dust cover body and an air inlet duct, with an air inlet gap between the upper end of the air inlet duct and the dust cover body; an air suction duct and a negative pressure fan, with the air inlet of the air suction duct connected to the lower end of the air inlet duct, and the air outlet of the air suction duct located at the lower end of the air inlet and connected to the negative pressure fan; a flushing chamber disposed below the air inlet duct; a lifting support device and multiple filter cartridges stacked sequentially on the lifting support device, the lifting support device being able to move up and down along the axial direction of the air suction duct, the lifting support device being able to support the filter cartridges in the filtration working position, the filter cartridges in the filtration working position being the working filter cartridges; and an isolation structure disposed within the air inlet duct, with the filter cartridges stacked above the working filter cartridges being spare filter cartridges. This dust cover device improves the efficiency and continuity of dust removal in production workshops.

Description

Technical Field

[0001] This application relates to the field of dust removal technology in production workshops, and more specifically, to a dust cover device. Background Technology

[0002] The production and manufacturing of certain products generate large amounts of dust and other impurities. Taking papermaking as an example, processes such as cutting, rewinding, and waste recycling produce significant amounts of paper dust. This dust not only affects air quality and harms the health of workers, but can also pose safety hazards such as dust explosions. Therefore, papermaking workshops are typically equipped with dust removal systems to control dust dispersion.

[0003] Currently, dust hoods are widely used in production workshops such as papermaking where dust and other impurities are easily generated. The core components of a dust hood include the hood body, a negative pressure fan, and airflow ducts. The hood body is connected to the negative pressure fan via the airflow ducts, which contain a filter. The hood body is positioned above the papermaking machine. The negative pressure fan generates a negative pressure airflow below the hood body, drawing paper dust from near the papermaking machine through the hood body and airflow ducts to the negative pressure fan. The filter intercepts and filters the paper dust, and the filtered air is discharged through the negative pressure fan. However, this type of dust hood has a drawback: after a certain period of operation, paper dust accumulates on the filter surface, increasing filtration resistance, reducing suction efficiency, and even causing the filter to become clogged and inoperable. This necessitates stopping the machine to clean or replace the filter, disrupting the continuous dust removal operation. Frequent shutdowns for cleaning or replacement significantly reduce the overall operating efficiency of the dust hood, making continuous dust removal impossible. Summary of the Invention

[0004] In view of this, this application provides a dust cover device to solve the technical problem of low dust removal efficiency in existing dust cover devices.

[0005] This application provides a dust cover device, wherein the dust cover device includes: The dust cover body and the air inlet duct disposed below the dust cover body, with an air inlet gap between the upper end of the air inlet duct and the dust cover body; The suction duct and the negative pressure fan are provided. The air inlet of the suction duct is connected to the lower end of the air inlet duct, and the air outlet of the suction duct is located at the lower end of the air inlet and is connected to the negative pressure fan. A flushing chamber is disposed below the air inlet duct, and the flushing chamber is arranged around the air intake duct; The system includes a lifting support device and multiple filter cartridges stacked sequentially on the lifting support device. The lifting support device can move up and down along the axial direction of the air intake duct to drive the filter cartridges to move up and down between the air intake duct and the flushing chamber. The lifting support device can support the filter cartridges in the filtration working position. The filter cartridges in the filtration working position are the working filter cartridges. The lower port of the working filter cartridge is connected to the air inlet, and the outer side of the working filter cartridge is connected to the air inlet gap. An isolation structure is installed inside the air inlet duct. The filter cylinder stacked above the working filter cylinder is a spare filter cylinder. The isolation structure is respectively attached to the outer and inner sides of the spare filter cylinder to isolate the spare filter cylinder from the airflow inside the air inlet duct.

[0006] Furthermore, the dust cover device includes a wind speed sensor rotatably disposed in the air inlet duct, and the wind speed sensor is signal-connected to the lifting support device.

[0007] Furthermore, the dust cover device also includes a drain chamber located below the flushing chamber. The drain chamber is arranged around the suction duct. The filter cartridge can move up and down through the drain chamber and be located in the flushing chamber above or below the drain chamber. When the filter cartridge passes through the drain chamber, the drain chamber is located at intervals inside the filter cartridge.

[0008] Furthermore, the isolation structure includes an isolation sleeve connected to the lower end of the dust cover body and isolation columns spaced apart inside the isolation sleeve. A first annular gap exists between the isolation columns and the isolation sleeve. The outer side of the isolation column is connected to the inner side of the isolation sleeve via a first connecting plate. The filter cartridge has a first axial notch. The width of the first axial notch is greater than or equal to the diameter of the suction duct. The filter cartridge can enter the first annular gap from above. When the filter cartridge enters the first annular gap from above, the first axial notch passes through the first connecting plate. The outer side of the spare filter cartridge is in contact with the inner side of the isolation sleeve, and the inner side of the spare filter cartridge is in contact with the isolation column.

[0009] Furthermore, an extended annular plate is formed at the air inlet of the air intake of the air intake duct, the top plate of the flushing chamber is connected to the lower end of the air intake duct, a second annular gap is formed between the top plate and the extended annular plate, the lower end of the working filter cylinder is located in the second annular gap, and an arc-shaped plate extending upward from the second annular gap is formed on the top plate, the shape and size of the arc-shaped plate being adapted to the shape and size of the first axial notch.

[0010] Furthermore, the rinsing chamber is provided with an annular rinsing pipe, which is arranged around the suction pipe. The annular rinsing pipe is provided with multiple nozzles facing the suction pipe, and the nozzles face the outside of the filter cartridge located in the rinsing chamber.

[0011] Furthermore, an annular water guide plate is formed at the upper end of the sewage discharge chamber, and the annular water guide plate is spaced around the air suction pipe. The upper surface of the annular water guide plate forms an inclined surface that slopes downward toward the air suction pipe.

[0012] Furthermore, the upper end of the sewage discharge chamber is connected to the bottom plate of the flushing chamber via a second connecting plate, and there is an arc-shaped gap between the upper end of the sewage discharge chamber and the bottom plate. A sewage discharge pipe is connected to the side wall of the sewage discharge chamber. The lifting support device includes a cylinder and a notched support ring for supporting the filter cartridge. The piston rod of the cylinder extends upward from the cylinder body. The notched support ring is connected to the upper end of the piston rod. The shape and size of the notched support ring are adapted to the shape and size of the arc-shaped gap. The piston rod is located within the contour of the notched support ring along the axial direction of the suction pipe. The notched support ring has a second axial notch. The positions of the first connecting plate, the arc-shaped plate, the second axial notch, the second connecting plate, and the sewage discharge pipe are aligned along the axial direction of the suction pipe. When the filter cartridge moves up and down with the notched support ring, both the first axial notch and the second axial notch can pass through the second connecting plate and the sewage discharge pipe.

[0013] Furthermore, when the filter cylinder supported by the notched support ring is in the filter working position, the notched support ring is pressed against the top plate and aligned with the second annular gap.

[0014] Furthermore, the side wall of the sewage discharge chamber is connected to a sewage discharge pipe, and when the filter cylinder moves up and down with the notch support ring, both the first axial notch and the second axial notch can pass through the sewage discharge pipe.

[0015] The beneficial effects of the dust cover equipment provided in this application are as follows: Compared to existing technologies, the dust cover device provided in this application includes a dust cover body, an air inlet duct, an air suction duct, a negative pressure fan, a rinsing chamber, a lifting support device, and multiple filter cartridges stacked sequentially on the lifting support device. The upper end of the air inlet duct has an air inlet gap with the dust cover. The air inlet of the air suction duct is connected to the lower end of the air inlet duct, and the air outlet of the air suction duct is located below the air inlet and connected to the negative pressure fan. The lifting support device can move up and down along the axial direction of the air suction duct to drive the filter cartridges to move up and down between the air inlet duct and the rinsing chamber. The lifting support device can support the filter cartridges in the filtration working position. The filter cartridge in the filtration working position is the working filter cartridge. The lower end of the working filter cartridge is connected to the air inlet. The outer side of the filter cylinder leads to the air inlet gap, so the dust cover for the paper machine can be arranged around various papermaking equipment. A negative pressure airflow is generated below the dust cover body by a negative pressure fan, which draws paper dust, dust, and other impurities from near the paper machine or equipment that generates various dust and other impurities through the dust cover body, the air inlet gap, the air inlet pipe, the outer side of the working filter cylinder, the inner side of the working filter cylinder, and the air inlet of the suction pipe to the negative pressure fan. The working filter cylinder intercepts and filters paper dust, dust, and other impurities. The air after filtering paper dust or other dust and other impurities is discharged through the negative pressure fan. After the working filter cylinder has been overloaded for a period of time, it can enter the washing chamber for cleaning with the lifting support device. Meanwhile, the spare filter cylinder stacked above the working filter cylinder arrives at the filtration work position to continue working. This dust cover equipment improves the efficiency and continuity of dust removal in the papermaking workshop. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A perspective view of a portion of the structure of a dust cover device according to an embodiment of this application when a filter cartridge is installed; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of point B in the middle; Figure 4 This is a perspective view of a portion of the structure of a dust cover device according to an embodiment of this application when the filter cartridge is not installed; Figure 5 for Figure 4Enlarged view of point C in the middle; Figure 6 for Figure 4 Enlarged view of point D in the middle; Figure 7 This is a perspective view of another part of the structure of a dust cover device according to an embodiment of this application when the filter cartridge is not installed; Figure 8 for Figure 7 Enlarged view at point E in the middle; Figure 9 This is a perspective view of the filter cartridge in a dust cover device according to an embodiment of this application; Figure 10 This is a perspective view of a dust cover device according to an embodiment of this application; Figure 11 for Figure 10 Enlarged view of point F in the middle.

[0018] Explanation of reference numerals in the attached figures: 1-Dust cover body; 2-Air inlet duct; 3-Column; 4-Air inlet gap; 5-Negative pressure fan; 6-Isolation sleeve; 7-Isolation column; 8-First annular gap; 9-First connecting plate; 10-Second annular gap; 11-Annular flushing pipe; 12-Nozzle; 13-Arc-shaped gap; 14-Cylinder; 15-Piston rod; 16-Hanging beam; 17-Third annular gap; 18-Sewage pipe; 19-Main water pipe; 20-Second connecting plate; 100-Suction duct; 101-Air inlet; 102-Outer annular plate; 200-Flushing chamber; 201-Top plate; 202-Arc-shaped plate; 203-Bottom plate; 300-Filter cartridge; 301-First axial notch; 302-Insertion hole; 400-Sewage chamber; 401-Annular water guide plate; 500-Notch support ring; 501-Second axial notch; 502-Insertion column. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. One or more embodiments of this application are exemplarily shown in the drawings to provide a more accurate and thorough understanding of the technical solutions disclosed herein. However, it should be understood that this application can be implemented in many different forms and is not limited to the embodiments described below.

[0020] In the accompanying drawings of this application, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0022] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0023] See Figures 1 to 11 This application provides a dust cover device that can be applied in production workshops with large amounts of dust, ash, or paper dust. The dust cover device includes: The dust cover body 1 and the air inlet duct 2 located below the dust cover body 1 have an air inlet gap 4 between the upper end of the air inlet duct 2 and the dust cover body 1. The dust cover body 1 can be supported on the ground by the column 3, or it can be hoisted on the top beam and other components of the papermaking workshop by the hoisting parts. The upper end of the air inlet duct 2 can be connected to the lower part of the dust cover body 1 by the hoisting beam 16. The suction duct 100 and the negative pressure fan 5 are connected. The air inlet 101 of the suction duct 100 is connected to the lower end of the air inlet duct 2, and the air outlet of the suction duct 100 is located at the lower end of the air inlet 101 and is connected to the negative pressure fan 5. A flushing chamber 200 is installed below the air inlet duct 2, and the flushing chamber 200 is arranged around the air intake duct 100; The lifting support device and multiple filter cylinders 300 stacked on the lifting support device are understood to have filter holes through the inner and outer sides of the filter cylinder 300 on the side wall. The lifting support device can move up and down along the axial direction of the suction duct 100 to drive the filter cylinder 300 to move up and down between the air inlet duct 2 and the washing chamber 200. The lifting support device can support the filter cylinder 300 in the filtering working position. The filter cylinder 300 in the filtering working position is the working filter cylinder. The lower end of the working filter cylinder is connected to the air inlet 101. The outer side of the working filter cylinder is connected to the air inlet gap 4. When the filter cylinder 300 is working, the airflow carrying paper dust flows from the outer side of the working filter cylinder to the inner side of the working filter cylinder through the filter holes of the filter cylinder 300. During this process, most of the paper dust in the airflow is filtered and collected in the filter holes. An isolation structure is installed inside the air inlet duct 2. The filter cylinder 300 stacked above the working filter cylinder is a spare filter cylinder. The isolation structure is attached to the outer and inner sides of the spare filter cylinder to isolate the spare filter cylinder from the airflow in the air inlet duct 2, ensuring that the spare filter cylinder does not perform filtration work on the airflow entering the air inlet duct 2.

[0024] The dust cover equipment provided in this application includes a dust cover body 1, an air inlet duct 2, an air suction duct 100, a negative pressure fan 5, a rinsing chamber 200, a lifting support device, and multiple filter cartridges 300 stacked on the lifting support device. The upper end of the air inlet duct 2 has an air inlet gap 4 with the dust cover. The air inlet 101 of the air suction duct 100 is connected to the lower end of the air inlet duct 2. The air outlet of the air suction duct 100 is located below the air inlet 101 and connected to the negative pressure fan 5. The lifting support device can move up and down along the axial direction of the air suction duct 100 to drive the filter cartridges 300 to move up and down between the air inlet duct 2 and the rinsing chamber 200. The lifting support device can support the filter cartridges 300 in the filtration working position. The filter cartridge 300 in the filtration working position is the working filter cartridge. The lower end of the working filter cartridge is connected to the air inlet 101, and the outer side of the working filter cartridge opens to the air inlet gap 4. This dust cover for papermaking machines can be placed around various papermaking equipment or equipment that generates various dust and other impurities. A negative pressure fan 5 operates below the dust cover body 1, generating a negative pressure airflow. This draws paper dust and other impurities from near the papermaking machine or other equipment through the dust cover body 1, the air inlet gap 4, the air inlet duct 2, the outside of the working filter cylinder, the inside of the working filter cylinder, and the air inlet 101 of the suction duct 100 to the negative pressure fan 5. The working filter cylinder intercepts and filters the paper dust and other impurities. The filtered air is then discharged through the negative pressure fan 5. After working for a period of time and exceeding its load, the working filter cylinder can be moved to the washing chamber 200 for cleaning via the lifting support device. Meanwhile, the spare filter cylinder stacked above the working filter cylinder reaches its filtration position and continues working. This dust cover equipment improves the efficiency and continuity of dust removal in the papermaking workshop.

[0025] According to a preferred embodiment of this application, at least three filter cylinders 300 are stacked on the lifting support device, for example... Figure 1 The diagram shows three filter cartridges 300 arranged from top to bottom, with the bottommost filter cartridge 300 being the working filter cartridge and the two filter cartridges 300 above the bottommost filter cartridge 300 being the standby filter cartridges.

[0026] According to one embodiment of this application, the dust cover device includes a wind speed sensor rotatably disposed in the air inlet duct 2. The wind speed sensor is signal-connected to the lifting support device. In this way, as more and more paper dust accumulates on the working filter cartridge, the opening of the filter pores of the working filter cartridge becomes smaller and smaller or even blocked, making it increasingly difficult for the airflow in the air inlet duct 2 to pass through the working filter cartridge, resulting in a decrease in the flow rate and flow volume in the air inlet duct 2. The wind speed sensor senses this situation and feeds back to the lifting support device, which drives multiple filter cartridges 300 to descend, so that the working filter cartridge enters the rinsing chamber 200, while the spare filter cartridge stacked above the working filter cartridge arrives at the filtration working position to continue working, thereby facilitating the automated and intelligent replacement of the filter cartridge 300 in the working position. Specifically, the dust cover device may include a main controller, which is signal-connected to the wind speed sensor and the lifting support device respectively.

[0027] According to one embodiment of this application, the dust cover device further includes a drain chamber 400 disposed below the rinsing chamber 200. The drain chamber 400 is arranged around the suction duct 100. The filter cartridge 300 can move up and down through the drain chamber 400 and be located either above or below the drain chamber 400. When the filter cartridge 300 passes through the drain chamber 400, the drain chamber 400 is located at intervals inside the filter cartridge 300. After the filter cartridge 300 in the rinsing chamber 200 is rinsed, the paper dust and other dust washed off flow into the drain chamber 400 together with the rinsing water. Subsequently, the wastewater carrying the paper dust in the drain chamber 400 can be discharged.

[0028] According to one embodiment of this application, the isolation structure includes an isolation sleeve 6 connected to the lower end of the dust cover body 1 and an isolation column 7 located at intervals inside the isolation sleeve 6. A first annular gap 8 is provided between the isolation column 7 and the isolation sleeve 6. The outer side of the isolation column 7 is connected to the inner side of the isolation sleeve 6 through a first connecting plate 9. The filter cartridge 300 has a first axial notch 301. The width of the first axial notch 301 is greater than or equal to the diameter of the suction pipe 100. The filter cartridge 300 can enter the first annular gap 8 from above. When the filter cartridge 300 enters the first annular gap 8 from above, the first axial notch 301 passes through the first connecting plate 9. The outer side of the spare filter cartridge is in contact with the inner side of the isolation sleeve 6, and the inner side of the spare filter cartridge is in contact with the isolation column 7. A spare filter cartridge can be added above the dust cover body 1 through the first annular gap 8.

[0029] According to a specific embodiment of this application, the isolation column 7, the isolation sleeve 6, and the suction duct 100 are all arranged coaxially in the vertical direction. The air inlet 101 of the suction duct 100 faces vertically upward, and the air outlet of the suction duct 100 is connected to the air inlet of the negative pressure fan 5 through a horizontal pipe. The dust cover body 1, the air inlet duct 2, the suction duct 100, the rinsing chamber 200, and the sewage discharge chamber 400 are arranged in the vertical direction, which can save horizontal space, facilitate the arrangement of the dust cover equipment on one side of various papermaking equipment, and allow the dust cover body 1 to extend above the papermaking equipment.

[0030] According to one embodiment of this application, an extended annular plate 102 is formed at the air inlet 101 of the air intake duct 100. The top plate 201 of the flushing chamber 200 is connected to the lower end of the air intake duct 2. A second annular gap 10 is formed between the top plate 201 and the extended annular plate 102. The lower end of the working filter cylinder is located in the second annular gap 10. An arc-shaped plate 202 extending upward from the second annular gap 10 is formed on the top plate 201. The shape and size of the arc-shaped plate 202 are adapted to the shape and size of the first axial notch 301. When the filter cylinder 300 is in the filtering working position, the arc-shaped plate 202 is inserted into the first axial notch 301 of the filter cylinder 300 (working filter cylinder) and is sealed and fitted with the peripheral wall of the first axial notch 301. Moreover, a part of the lower end of the isolation column 7 extends into the upper end of the inner side of the working filter cylinder and fits a portion of the upper end of the inner side of the working filter cylinder. This ensures that the airflow from the outside of the working filter cylinder to the inside of the working filter cylinder can only pass through the filter holes on the working filter cylinder.

[0031] According to one embodiment of this application, an annular flushing pipe 11 is provided in the flushing chamber 200. The annular flushing pipe 11 is arranged around the suction pipe 100. Multiple nozzles 12 are provided on the annular flushing pipe 11 facing the suction pipe 100. The nozzles 12 face the outside of the filter cartridge 300 inside the flushing chamber 200. Specifically, at least multiple annular flushing pipes 11 are arranged from above. Each annular flushing pipe 11 is connected to the outlet of a high-pressure water pump (not shown) through a main water pipe 19. The inlet of the high-pressure water pump can be connected to a water tank (not shown). The high-pressure water pump is connected to the main control signal.

[0032] According to one embodiment of this application, an annular water guide plate 401 is formed at the upper end of the sewage discharge chamber 400. The annular water guide plate 401 surrounds the suction pipe 100 at intervals. The upper surface of the annular water guide plate 401 forms an inclined surface that slopes downward toward the suction pipe 100. The paper dust in the filter holes of the filter cylinder 300 in the rinsing chamber 200 is washed to the inner side of the filter cylinder 300 by the water sprayed from the nozzle 12, and flows into the sewage discharge chamber 400 from the gap between the annular water guide plate 401 and the outer side of the suction pipe 100 along the inclined surface of the annular water guide plate 401.

[0033] According to one embodiment of this application, the upper end of the sewage discharge chamber 400 is connected to the bottom plate 203 of the flushing chamber 200 via a second connecting plate 20, and there is an arc-shaped gap 13 between the upper end of the sewage discharge chamber 400 and the bottom plate 203. A sewage discharge pipe 18 is connected to the side wall of the sewage discharge chamber 400. The lifting support device includes a cylinder 14 and a notched support ring 500 for supporting the filter cylinder 300. The piston rod 15 of the cylinder 14 extends upward from the cylinder body of the cylinder 14, and the notched support ring 500 is connected to the upper end of the piston rod 15. The shape of the notched support ring 500 is... The dimensions of the piston rod 15 are adapted to the shape and size of the arc-shaped gap 13. The piston rod 15 is located within the contour of the notch support ring 500 along the axial direction of the suction pipe 100. The notch support ring 500 has a second axial notch 501. The positions of the first connecting plate 9, the arc-shaped plate 202, the second axial notch 501, the second connecting plate 20, and the drain pipe 18 are aligned along the axial direction of the suction pipe 100. When the filter cartridge 300 moves up and down with the notch support ring 500, both the first axial notch 301 and the second axial notch 501 can pass through the second connecting plate 20 and the drain pipe. In addition to pipe 18, a post 502 can be provided above the notch support ring 500, and a socket 302 adapted to the post 502 can be provided at the lower end of the filter cylinder 300. This ensures the stability of the filter cylinder 300 when it rises and falls with the notch support ring 500. When the notch support ring 500 descends to the point that the filter cylinder 300 supported on it is below the sewage chamber 400, the filter cylinder 300 is first lifted upwards so that the socket 302 leaves the post 502. Since the width of the first axial notch 301 of the filter cylinder 300 is greater than or equal to that of the suction pipe, With a diameter of 100, the filter cartridge 300 is moved laterally, and the filter cartridge 300 surrounding the suction duct 100 can be completely removed through the first axial notch 301. Since the filter cartridge 300 has been washed by the flushing chamber 200, it can be reinserted into the air inlet duct 2 through the first annular gap 8. In addition, the isolation column 7 can pass upward through the dust cover body 1 and form a third annular gap 17 with the dust cover body 1. The filter cartridge 300 can reach the air inlet duct 2 from top to bottom through the third annular gap 17 and the first annular gap 8.

[0034] According to a specific embodiment of this application, when the filter cylinder 300 supported by the notched support ring 500 is in the filtration working position, the notched support ring 500 is attached upward against the top plate 201 and aligned with the second annular gap 10. When the filter cylinder 300 supported by the notched support ring 500 enters the rinsing chamber 200 and is rinsed, the notched support ring 500 is precisely sealed and filled in the arc-shaped gap 13. At this time, the upper surface of the notched support ring 500 is slightly higher than the upper end of the annular water guide plate 401 or at least flush with the upper end of the annular water guide plate 401, so that the paper dust washed by the water can flow smoothly along the annular water guide plate 401 into the sewage discharge chamber 400.

[0035] It should be noted that the above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting this application. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of this application, such as combining different features in various embodiments, and these should all fall within the protection scope of this application.

Claims

1. A dust cover apparatus, characterized by, The dust cover equipment includes: The dust cover body and the air inlet duct disposed below the dust cover body, with an air inlet gap between the upper end of the air inlet duct and the dust cover body; The suction duct and the negative pressure fan are provided. The air inlet of the suction duct is connected to the lower end of the air inlet duct, and the air outlet of the suction duct is located at the lower end of the air inlet and is connected to the negative pressure fan. A flushing chamber is disposed below the air inlet duct, and the flushing chamber is arranged around the air intake duct; The system includes a lifting support device and multiple filter cartridges stacked sequentially on the lifting support device. The lifting support device can move up and down along the axial direction of the air intake duct to drive the filter cartridges to move up and down between the air intake duct and the flushing chamber. The lifting support device can support the filter cartridges in the filtration working position. The filter cartridges in the filtration working position are the working filter cartridges. The lower port of the working filter cartridge is connected to the air inlet, and the outer side of the working filter cartridge is connected to the air inlet gap. An isolation structure is installed inside the air inlet duct. The filter cylinder stacked above the working filter cylinder is a spare filter cylinder. The isolation structure is respectively attached to the outer and inner sides of the spare filter cylinder to isolate the spare filter cylinder from the airflow inside the air inlet duct. The isolation structure includes an isolation sleeve connected to the lower end of the dust cover body and isolation columns spaced apart inside the isolation sleeve. A first annular gap exists between the isolation columns and the isolation sleeve. The outer side of the isolation column is connected to the inner side of the isolation sleeve via a first connecting plate. The filter cartridge has a first axial notch, the width of which is greater than or equal to the diameter of the suction duct. The filter cartridge can enter the first annular gap from above. When the filter cartridge enters the first annular gap from above, the first axial notch passes through the first connecting plate. The outer side of the spare filter cartridge is in contact with the inner side of the isolation sleeve, and the inner side of the spare filter cartridge is in contact with the isolation column. The suction duct forms an extended annular plate at the air inlet. The top plate of the flushing chamber is connected to the lower end of the air inlet duct. A second annular gap is formed between the top plate and the extended annular plate. The lower end of the working filter cartridge is located in the second annular gap. An arc-shaped plate extending upward from the second annular gap is formed on the top plate, and the shape and size of the arc-shaped plate are adapted to the shape and size of the first axial notch.

2. The dust cap apparatus of claim 1, wherein The dust cover device includes a wind speed sensor rotatably installed inside the air inlet duct, and the wind speed sensor is signal-connected to the lifting support device.

3. The dust cap apparatus of claim 2, wherein, The dust cover device also includes a drain chamber located below the flushing chamber. The drain chamber is arranged around the suction duct. The filter cartridge can move up and down through the drain chamber and be located in the flushing chamber above or below the drain chamber. When the filter cartridge passes through the drain chamber, the drain chamber is located at intervals inside the filter cartridge.

4. The dust cap apparatus of claim 3, wherein The rinsing chamber is equipped with an annular rinsing pipe that surrounds the air intake pipe. The annular rinsing pipe is equipped with multiple nozzles that face the air intake pipe and are directed towards the outside of the filter cartridge located inside the rinsing chamber.

5. The dust cap apparatus of claim 3, wherein The upper end of the sewage discharge chamber forms an annular water guide plate, which surrounds the air suction pipe at intervals, and the upper surface of the annular water guide plate forms an inclined surface that slopes downward toward the air suction pipe.

6. The dust cap apparatus of claim 5, wherein, The upper end of the sewage discharge chamber is connected to the bottom plate of the flushing chamber via a second connecting plate, and there is an arc-shaped gap between the upper end of the sewage discharge chamber and the bottom plate. A sewage discharge pipe is connected to the side wall of the sewage discharge chamber. The lifting support device includes a cylinder and a notched support ring for supporting the filter cartridge. The piston rod of the cylinder extends upward from the cylinder body. The notched support ring is connected to the upper end of the piston rod. The shape and size of the notched support ring are adapted to the shape and size of the arc-shaped gap. The piston rod is located within the contour of the notched support ring along the axial direction of the suction pipe. The notched support ring has a second axial notch. The positions of the first connecting plate, the arc-shaped plate, the second axial notch, the second connecting plate, and the sewage discharge pipe are aligned along the axial direction of the suction pipe. When the filter cartridge moves up and down with the notched support ring, both the first axial notch and the second axial notch can pass through the second connecting plate and the sewage discharge pipe.

7. The dust cap apparatus of claim 6, wherein When the filter cylinder supported by the notched support ring is in the filtration working position, the notched support ring is pressed against the top plate and aligned with the second annular gap.

8. The dust cap apparatus of claim 6, wherein, The side wall of the sewage discharge chamber is connected to a sewage discharge pipe. When the filter cylinder moves up and down with the notch support ring, both the first axial notch and the second axial notch can pass through the sewage discharge pipe.

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