Anti-backflow air inlet of dust remover

Abstract

The utility model relates to a dust remover anti -back flow type air inlet, including fixedly connected in the dust remover body side part for the air inlet air inlet cylinder body, the air inlet cylinder body in matching fixedly has the round plate, be equipped with the through slot of two ends through and present the rectangle shape on the round plate, the through slot both sides inner wall respectively fixed with the gasbag, two gasbags can be mutually close type inflation extension when inflating, when both gasbags are all in the deflation state, form the inlet in the through slot between two gasbags, when both gasbags are all inflated to the limit state, two gasbags mutually resist and touch, and the through slot is blocked. The utility model discloses through to two gasbags inflation, until two gasbags inflation to the limit position, two gasbags mutually resist and touch, and the through slot is blocked, and cooperate with the round plate, can block in the air inlet cylinder body, when carrying out the pulse cleaning work to the filter cylinder, can effectively prevent the dust and dirt that the dust remover box body lifts and returns to the outside through the air inlet and causes secondary pollution to the production site.

Description

Technical Field

[0001] This utility model relates to the field of dust collector technology, specifically to a dust collector anti-backflow air inlet. Background Technology

[0002] Laser cutting equipment generates a large amount of smoke and dust when cutting metal materials. Therefore, a dust collector is needed to collect and treat the smoke and dust generated by laser cutting. Existing laser cutting dust collectors mainly use impellers or fans to create negative pressure inside the dust collector box. The smoke, dust and cutting debris generated by laser cutting are sucked into the dust collector box through the air inlet and filtered by the filter cartridge inside the dust collector box to remove debris and dust, thereby purifying the air.

[0003] Existing dust collectors have a self-cleaning effect, which can remove dust and impurities accumulated on the filter cartridge by generating pulsed airflow inside, avoiding filter cartridge blockage and affecting normal dust removal work after long-term use. However, the air inlet of traditional dust collectors is unobstructed. When the dust collector is self-cleaning, due to the high pressure inside the dust collector, some dust and debris will be discharged out through the air inlet and dust collection pipe, causing secondary pollution to the production site. Utility Model Content

[0004] The purpose of this invention is to provide a backflow-proof air inlet for a dust collector, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A backflow-prevention air inlet for a dust collector includes an air inlet cylinder fixedly connected to the side of the dust collector body for air intake. A circular plate is fixedly fitted inside the air inlet cylinder. The circular plate has a rectangular through-hole with both ends. Airbags are fixed on the inner walls of the through-holes on both sides. When inflated, the two airbags can expand and extend close to each other. When both airbags are in the deflated state, an inlet is formed between the two airbags in the through-hole. When both airbags are inflated to their limit, they collide with each other and block the through-hole. An air distribution mechanism is provided on the air inlet cylinder for inflating and deflating the two airbags.

[0007] As can be seen, by working the air distribution mechanism to inflate the two airbags until they are inflated to their limit, the two airbags come into contact with each other and seal the through slot. In conjunction with the circular plate, the air inlet can be sealed. When pulse cleaning is performed on the filter cartridge, it can effectively prevent dust and dirt raised in the dust collector box from flowing back to the outside through the air inlet and causing secondary pollution to the production site.

[0008] Furthermore, a guide tube is fixed on the side of the air inlet duct away from the dust collector body. The diameter of the guide tube is smaller as it gets closer to the circular plate. When both air bags are in the deflated state, the small diameter port of the guide tube is directly opposite the inlet.

[0009] Furthermore, the air distribution mechanism includes an air distribution cylinder, a piston, a guide rod, a drive mechanism, and a channel system. The air distribution cylinder is vertically fixed on the outer wall of the air inlet cylinder. The top of the air distribution cylinder has an insertion hole, and the bottom has an air guide port. The piston is installed inside the air distribution cylinder and slides tightly against the inner wall of the air distribution cylinder. The guide rod is vertically fixed on the top end face of the piston and slides through the insertion hole to extend above the air distribution cylinder. The drive mechanism is located on the outer wall of the air inlet cylinder and is used to drive the guide rod to rise and fall for adjustment. The channel system is located inside a circular plate and is used to connect the air guide port to the two airbags.

[0010] Furthermore, the channel system includes a main air channel and a pair of auxiliary air channels. The main air channel extends vertically within the circular plate, while the two auxiliary air channels are symmetrically located on both sides of the circular plate. The top of the main air channel is connected to the air inlet, and the bottom is connected to one end of each of the two auxiliary air channels. The other ends of the two auxiliary air channels are connected to the corresponding airbags.

[0011] Furthermore, the drive mechanism includes a pair of brackets, a mounting base, and an electric push cylinder. The two brackets are respectively fixed on the outer wall of the air inlet casing and located on both sides of the air distribution casing. The mounting base is fixed together on the top of the two brackets. The electric push cylinder is vertically fixed above the mounting base, and the telescopic rod of the electric push cylinder extends through to the bottom of the mounting base and is fixedly connected to the top of the guide rod.

[0012] Furthermore, rubber pads are fixed to the side surfaces of the two airbags that are close to each other, and the two rubber pads fit tightly together when the two airbags are inflated to their limit.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0014] 1. This utility model uses an air distribution mechanism to inflate two airbags until they are inflated to their limit. The two airbags then come into contact with each other and seal the through slot. In conjunction with the circular plate, the air inlet can be sealed. When pulse cleaning is performed on the filter cartridge, this effectively prevents dust and dirt raised inside the dust collector from flowing back to the outside through the air inlet and causing secondary pollution to the production site.

[0015] 2. This utility model provides a guide tube located upstream of the circular plate in the air inlet tube, with the guide tube arranged in a trumpet shape. During dust removal, the guide tube precisely guides the airflow and dust debris to the inlet, minimizing contact and collision between dust debris and the airbag, thereby improving the service life of the airbag.

[0016] 3. This utility model fixes rubber pads on the side surfaces of the two airbags that are close to each other. When the two airbags are inflated to their limit, the two rubber pads fit tightly together, achieving a good sealing effect and further improving the anti-backflow effect. In addition, the two rubber pads cover the sides of the airbags, which can effectively protect the side of the two airbags that are close to each other, further reducing the contact and collision between dust, debris and other dirt and the airbags, achieving two benefits in one. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the surface structure of the air inlet cylinder in this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the air inlet cylinder in this utility model.

[0020] Figure 4 This is a partial cross-sectional view of the present invention.

[0021] In the diagram: 1. Dust collector body; 2. Inlet cylinder; 21. Guide cylinder; 3. Circular plate; 31. Through slot; 32. Inlet; 4. Air bag; 41. Rubber pad; 5. Air distribution mechanism; 6. Air distribution cylinder; 61. Air guide port; 62. Insertion hole; 63. Piston; 64. Guide rod; 7. Drive mechanism; 71. Bracket; 72. Mounting base; 73. Electric push cylinder; 8. Main air channel; 9. Secondary air channel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0024] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0025] Please see Figures 1-4 This utility model provides a dust collector anti-backflow air inlet, including an air inlet cylinder 2 fixedly connected to the side of the dust collector body 1 for air intake. A circular plate 3 is fixedly matched inside the air inlet cylinder 2. The circular plate 3 is provided with a rectangular through slot 31 with both ends through it. Airbags 4 are fixed on the inner walls of both sides of the through slot 31. When the two airbags 4 are inflated, they can expand and extend close to each other. When both airbags 4 are in the deflated state, an inlet 32 ​​is formed in the through slot 31 between the two airbags 4. When both airbags 4 are inflated to the limit state, the two airbags 4 abut against each other and block the through slot 31. An air distribution mechanism 5 is provided on the air inlet cylinder 2 for inflating and deflating the two airbags 4.

[0026] When performing dust removal during laser cutting, the air distribution mechanism 5 controls both airbags 4 to be in a deflated state. At this time, an inlet 32 ​​for dust suction airflow is formed between the two airbags 4 in the through slot 31. When performing pulse air pressure cleaning on the filter cartridge inside the dust collector box, the air distribution mechanism 5 first inflates the two airbags 4 until they are inflated to their limit. The two airbags 4 then come into contact with each other and seal the through slot 31. In conjunction with the circular plate 3, the air inlet cylinder 2 can be sealed. Then, pulse cleaning is performed, which can effectively prevent dust and dirt raised inside the dust collector box from flowing back to the outside through the air inlet and causing secondary pollution to the production site.

[0027] Specifically, a guide tube 21 is fixed inside the air inlet duct 2 on the side away from the dust collector body 1. The diameter of the guide tube 21 is smaller as it gets closer to the circular plate 3. When both air bags 4 are in the deflated state, the small diameter port of the guide tube 21 faces the inlet 32. By setting the guide tube 21 on the upstream side of the circular plate 3 in the air inlet duct 2 and arranging the guide tube 21 in a funnel shape, the guide tube 21 can accurately guide the airflow and dust and debris to the inlet 32 ​​when the dust collector enters the air, thereby minimizing the contact and collision between dust and debris and the air bags 4 and improving the service life of the air bags 4.

[0028] Secondly, rubber pads 41 are fixed to the side surfaces of the two airbags 4 that are close to each other. When the two airbags 4 are inflated to their limit, the two rubber pads 41 fit tightly together, which achieves a good sealing effect and further improves the anti-backflow effect. In addition, the two rubber pads 41 cover the side of the airbags 4, which can effectively protect the side of the two airbags 4 that are close to each other, further reducing the contact and collision between dust, debris and other dirt and the airbags 4, achieving two goals at once.

[0029] Specifically, the air distribution mechanism 5 includes an air distribution cylinder 6, a piston 63, a guide rod 64, a drive mechanism 7, and a channel system. The air distribution cylinder 6 is vertically fixed on the outer wall of the air inlet cylinder 2. The top of the air distribution cylinder 6 has an insertion hole 62, and the bottom has an air guide port 61. The piston 63 is installed inside the air distribution cylinder 6 and slides tightly against the inner wall of the air distribution cylinder 6. The guide rod 64 is vertically fixed on the top end face of the piston 63 and slides through the insertion hole 62 to extend above the air distribution cylinder 6. The drive mechanism 7 is set on the outer wall of the air inlet cylinder 2 and is used to drive the guide rod 64 to rise and fall. The channel system is set inside the circular plate 3 and is used to connect the air guide port 61 with the two airbags 4.

[0030] The drive mechanism 7 moves the guide rod 64 and piston 63 downwards, and the piston 63 pressurizes the gas in the gas distribution cylinder 6 into the two airbags 4 through the channel system, thereby inflating the two airbags 4. The drive mechanism 7 moves the guide rod 64 and piston 63 upwards, and the piston 63 draws the gas in the two airbags 4 back into the gas distribution cylinder 6 through the channel system, thereby deflating the two airbags 4.

[0031] The duct system includes a main vent 8 and a pair of auxiliary vents 9. The main vent 8 extends vertically within the circular plate 3, and the two auxiliary vents 9 are symmetrically arranged on both sides of the circular plate 3. The top of the main vent 8 is connected to the air inlet 61, and the bottom is connected to one end of each of the two auxiliary vents 9. The other end of each of the two auxiliary vents 9 is connected to the corresponding airbag 4. The two auxiliary vents 9 connect the two airbags 4 to the main vent 8, and then the main vent 8 connects the two airbags 4 to the air inlet 61.

[0032] Secondly, the drive mechanism 7 includes a pair of brackets 71, a mounting base 72, and an electric push cylinder 73. The two brackets 71 are respectively fixed on the outer wall of the air inlet cylinder 2 and located on both sides of the air distribution cylinder 6. The mounting base 72 is fixed on the top of the two brackets 71. The electric push cylinder 73 is vertically fixed above the mounting base 72, and the telescopic rod of the electric push cylinder 73 extends through to the bottom of the mounting base 72 and is fixedly connected to the top of the guide rod 64. By extending the electric push cylinder 73, the guide rod 64 and the piston 63 can be pushed down. By retracting the electric push cylinder 73, the guide rod 64 and the piston 63 can be driven up, thereby providing a stable drive for the air inlet and outlet actions.

[0033] In addition, the electric push cylinder 73 is used as the driving source for inflation and deflation, and the driving stroke of the guide rod 64 is in the vertical direction, which is straightforward, resulting in high driving efficiency and a simple and effective structure.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A backflow-prevention air inlet for a dust collector, comprising an air inlet cylinder (2) fixedly connected to the side of the dust collector body (1) for air intake, characterized in that: A circular plate (3) is fixed inside the air inlet cylinder (2), and the circular plate (3) has a through slot (31) with both ends through and in a rectangular shape. Airbags (4) are fixed on the inner walls of both sides of the through slot (31), and the two airbags (4) can expand and extend close to each other when inflated. When both airbags (4) are in the deflated state, an inlet (32) is formed in the through slot (31) between the two airbags (4). When both airbags (4) are inflated to their maximum capacity, the two airbags (4) come into contact with each other and block the through slot (31); An air distribution mechanism (5) is provided on the air inlet cylinder (2), which is used for inflating and deflating the two air bags (4); A guide tube (21) is fixed inside the air inlet cylinder (2) on the side away from the dust collector body (1). The diameter of the guide tube (21) is smaller the closer it is to the circular plate (3). When both airbags (4) are in the deflated state, the small-diameter port of the guide tube (21) is directly opposite the inlet (32).

2. The anti-backflow air inlet for a dust collector according to claim 1, characterized in that: The gas distribution mechanism (5) includes a gas distribution cylinder (6), a piston (63), a guide rod (64), a drive mechanism (7), and a channel system; The air distribution cylinder (6) is vertically fixed on the outer wall of the air inlet cylinder (2). The top end of the air distribution cylinder (6) has an insertion hole (62) and the bottom end has an air guide port (61). The piston (63) is installed inside the gas distribution cylinder (6) and slides tightly against the inner wall of the gas distribution cylinder (6). The guide rod (64) is vertically fixed on the top end face of the piston (63) and slides through the insertion hole (62) to extend above the gas distribution cylinder (6). The drive mechanism (7) is located on the outer wall of the air inlet cylinder (2) and is used to drive the guide rod (64) to rise and fall. The channel system is set inside the circular plate (3) to connect the air inlet (61) to the two airbags (4).

3. The anti-backflow air inlet for a dust collector according to claim 2, characterized in that: The duct system includes a main vent (8) and a pair of secondary vents (9); The main air channel (8) is vertically extended inside the circular plate (3), and the two auxiliary air channels (9) are symmetrically arranged on both sides inside the circular plate (3). The top of the main air channel (8) is connected to the air guide port (61), and the bottom is connected to one end of each of the two auxiliary air channels (9). The other ends of the two auxiliary air channels (9) are respectively connected to the corresponding airbags (4).

4. The anti-backflow air inlet for a dust collector according to claim 3, characterized in that: The drive mechanism (7) includes a pair of brackets (71), a mounting base (72), and an electric push cylinder (73); The two brackets (71) are respectively fixed on the outer wall of the air inlet cylinder (2) and located on both sides of the air distribution cylinder (6). The mounting base (72) is fixed on the top of the two brackets (71). The electric push cylinder (73) is vertically fixed above the mounting base (72), and the telescopic rod of the electric push cylinder (73) extends through to the bottom of the mounting base (72) and is fixedly connected to the top of the guide rod (64).

5. The anti-backflow air inlet for a dust collector according to claim 4, characterized in that: Both airbags (4) have rubber pads (41) fixed on their side surfaces that are close to each other. When the two airbags (4) are inflated to their limit, the two rubber pads (41) fit tightly together.

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