Waste gas collecting and filtering device

Abstract

The utility model discloses a waste gas collecting and filtering device, which relates to the technical field of waste gas collecting and filtering and particularly comprises a shell, a filtering component is arranged in an inner cavity of the shell and divides the inner cavity of the shell into an air inlet cavity and an air outlet cavity, the air inlet cavity is connected with the air outlet cavity through a return pipe, and the filtering component comprises a filtering plate. The filter plates are connected with the shell in a clamped mode, a conversion structure is arranged between every two adjacent filter plates and divides a cavity between every two adjacent filter plates into an air exhaust side and an air inlet side, and the air exhaust side is located on the side, away from the air exhaust cavity, of the air inlet side. According to the waste gas collecting and filtering device, the filtering assembly is of a split type design, the filtered gas meeting the requirement can be exhausted in time, the waste gas collecting and filtering efficiency is improved, a worker can replace the filtering plate which cannot work normally according to requirements, other filtering plates can be used normally, and the utilization rate of the filtering assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas collection and filtration, in particular to a waste gas collection and filtration device. Background Technique

[0002] Waste gas refers to the toxic and harmful gases discharged by humans in the production and living processes, such as automobile exhaust. Since there are hundreds of different compounds in automobile exhaust, the pollutants include solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, etc. Automobile exhaust will directly endanger people's physical health and also have a great impact on people's living environment. Therefore, in places where automobile exhaust emissions are relatively concentrated, such as parking lots, it is necessary to collect and filter the waste gas emitted by automobiles.

[0003] In the related art, the device for collecting and filtering automobile waste gas usually uses filtering components such as filter cartridges to filter the automobile waste gas. Since the filtering components are generally of an integral structure, and when in use, the side of the filtering component close to the air inlet end filters the waste gas first. Therefore, the impurity content on the side of the filtering component close to the air inlet end is greater than that on the other end. As a result, when the filtering component is replaced, the side close to the air outlet end may still be able to work normally, reducing the utilization rate of the filtering component. Moreover, when the waste gas is directly filtered by the filtering component, the large-particle impurities intercepted by the filtering component will block the filtering component, affecting the rate of air passing through the filtering component, and thus affecting the waste gas treatment efficiency. Based on this, the present application proposes a waste gas collection and filtration device. Content of the Utility Model

[0004] The utility model provides a waste gas collection and filtration device, which solves the problems raised in the above background technique, that is, the filtering component is of an integral structure, the utilization rates of both sides are inconsistent, and when replaced as a whole, the side close to the air outlet end may still be able to work normally, reducing the utilization rate of the filtering component; and the large-particle impurities will affect the rate of air passing through the filtering component, affecting the waste gas treatment efficiency.

[0005] The utility model provides the following technical solution: An exhaust gas collection and filtration device, comprising a housing, wherein a filtration component is arranged in the inner cavity of the housing. The filtration component divides the inner cavity of the housing into an air inlet cavity and an air outlet cavity. The air inlet cavity and the air outlet cavity are connected by a reflux pipe. The filtration component includes a filter plate, and the filter plate is clamped with the housing. A conversion structure is arranged between two adjacent filter plates. The conversion structure divides the cavity between two adjacent filter plates into an air outlet side and an air inlet side, and the air outlet side is located on the side of the air inlet side away from the air outlet cavity. Dust sensors are arranged in the inner cavities of the air outlet side, the air inlet side, the air inlet cavity and the air outlet cavity. An air inlet branch pipe I is fixed at the top of the air inlet cavity, and an air inlet branch pipe II is fixed at the top of the air inlet side. The air inlet branch pipe I and the air inlet branch pipe II are connected with a pre-filter box through an air inlet main pipe. The pre-filter box includes a filter felt and an arc-shaped baffle. An air outlet branch pipe I is fixed at the top of the air outlet cavity, and an air outlet branch pipe II is fixed at the top of the air outlet side. The air outlet branch pipe I and the air outlet branch pipe II are both connected with the air inlet end of an exhaust fan through an air outlet main pipe;

[0006] The conversion structure includes a fixing plate, a moving plate and a blocking plate fixedly connected with the housing. The fixing plate is located between the air outlet branch pipe II and the air inlet branch pipe II. A through hole is arranged on the fixing plate. One side of the fixing plate close to the air outlet branch pipe II is in contact with the moving plate. A sealing plate is fixedly connected to the top of the moving plate. A connection hole adapted to the air outlet branch pipe II is arranged on the sealing plate. The blocking plate is connected with the housing through a spring. The blocking plate is adapted to the air inlet branch pipe II. A push block is fixed at the top of the blocking plate. A push rod is fixed at the top of the moving plate. Both the push rod and the push block are movably connected with the housing. The push rod is fixedly connected with the housing through a telescopic rod I.

[0007] Preferably, at least one group of pre-filtering components are arranged in the inner cavity of the pre-filter box. The pre-filtering components include a filter felt and an arc-shaped baffle. The filter felt is of a conical structure. The size of one end of the filter felt away from the arc-shaped baffle is larger than that of the other end. The side of the arc-shaped baffle close to the filter felt is an arc protruding outwards. An air inlet is arranged on one side of the pre-filter box. The filter felt is located on the side of the arc-shaped baffle close to the air inlet. An air outlet channel is arranged on the other side of the pre-filter box. The air outlet channel is communicated with the inner cavity of the air inlet main pipe.

[0008] Preferably, the push rod is of an L shape. A connecting block is fixedly connected to the bottom of one end of the push rod. The connecting block is fixedly connected to the top of the moving plate. The other end of the push rod is in the same straight line as the push block. When the connection hole overlaps with the air outlet branch pipe II, the other end of the push rod is in contact with the push block.

[0009] Preferably, a chute I adapted to the connecting block and a chute II adapted to the push block are arranged on the top of the housing. The moving plate seals the chute I, and the blocking plate seals the chute II.

[0010] Preferably, when the connection hole overlaps with the second exhaust branch pipe, the moving plate blocks the through hole, and the blocking plate is located below the second air inlet branch pipe. When the moving plate is flush with the side of the through hole away from the connection hole, the moving plate is flush with the side of the through hole close to the connection hole, the blocking plate is located below the second air inlet branch pipe, or the blocking plate is separated from the second air inlet branch pipe, the sealing plate seals the second exhaust branch pipe.

[0011] Preferably, electric ball valves are provided at one ends of the first air inlet branch pipe, the return pipe, and the first exhaust branch pipe.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] 1. For the waste gas collection and filtration device, the filtering assembly is designed in a split manner, which can timely discharge the filtered gas that meets the requirements, improve the waste gas collection and filtration efficiency, and the staff can replace the filter plates that cannot work properly according to the needs, and other filter plates can be used normally, improving the utilization rate of the filtering assembly.

[0014] 2. For the waste gas collection and filtration device, through the setting of the conversion structure, the opening and closing of the second exhaust branch pipe, the second air inlet branch pipe, and the through hole can be controlled by using the same power source, reducing the number of fittings of the device; through the setting of the dust sensor, the dust content in the air can be detected by using the dust sensor, and according to the detection result, it can be judged whether the air needs to be continuously filtered and the use effect of the filter plate, so that the filter plate can be replaced in time; through the setting of the pre-filtering box, large particle impurities in the waste gas can be intercepted, preventing the large particle impurities from blocking the filter plate and facilitating the use of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view of the structure of the present utility model;

[0016] Figure 2 is the structure of the present utility model Figure 1 rear view;

[0017] Figure 3 is a top view of the structure of the present utility model;

[0018] Figure 4 is the structure of the present utility model Figure 1 internal view;

[0019] Figure 5 is a schematic diagram of the conversion structure of the present utility model;

[0020] Figure 6 is a schematic diagram of the conversion structure of the present utility model in contact with both the second exhaust branch pipe and the second air inlet branch pipe;

[0021] Figure 7Internal schematic diagram of the pre-filter box of the structure of the present utility model;

[0022] Figure 8 Schematic diagram of the moving plate of the structure of the present utility model.

[0023] In the figure: 1, housing; 2, main exhaust pipe; 3, main intake pipe; 4, return pipe; 5, first intake branch pipe; 6, exhaust fan; 7, pre-filter box; 8, first telescopic rod; 9, first exhaust branch pipe; 10, second exhaust branch pipe; 11, electric ball valve; 12, second intake branch pipe; 13, second chute; 14, push block; 15, first chute; 16, push rod; 17, filter felt; 18, arc-shaped baffle; 19, exhaust passage; 20, dust sensor; 21, spring; 22, sealing plate; 23, blocking plate; 24, connecting block; 25, connecting hole; 26, filter plate; 27, fixing plate; 28, through hole; 29, moving plate. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] The present utility model provides an exhaust gas collection and filtration device, including a housing 1. A filtration component is provided in the inner cavity of the housing 1. The filtration component divides the inner cavity of the housing 1 into an intake cavity and an exhaust cavity. The intake cavity and the exhaust cavity are connected by a return pipe 4. One end of the return pipe 4 is provided with an electric ball valve 11. The energization of the return pipe 4 can be controlled through the electric ball valve 11, thereby realizing the connection and disconnection of the intake cavity and the exhaust cavity.

[0026] The filtration component is a split structure. The filtration component includes a filter plate 26. There is a gap between two adjacent filter plates 26. The size of the gap can be set according to requirements and is not limited here. The filter plate 26 is snap-fitted with the housing 1. The housing 1 is provided with a card slot adapted to the filter plate 26. The filter plate 26 is connected to the housing 1 by bolts. In this way, the connection reliability between the filter plate 26 and the housing 1 can be improved, and the replacement of the filter plate 26 is convenient.

[0027] A conversion structure is provided between two adjacent filter plates 26. The conversion structure divides the cavity between two adjacent filter plates 26 into an exhaust air side and an inlet air side, and the exhaust air side is located on the side of the inlet air side away from the exhaust air cavity. Dust sensors 20 are provided in the inner cavities of the exhaust air side, the inlet air side, the inlet air cavity, and the exhaust air cavity. Through the setting of the dust sensors 20, the dust content in the air can be detected by the dust sensors 20. According to the detection results, it can be judged whether the air needs to be further filtered and the usage effect of the filter plates 26, so that the filter plates 26 can be replaced in time.

[0028] An exhaust air branch pipe 9 is fixed to the top of the exhaust air cavity, and an exhaust air branch pipe 10 is fixed to the top of the exhaust air side. Both the exhaust air branch pipe 9 and the exhaust air branch pipe 10 are connected to the inlet end of the exhaust fan 6 through an exhaust air main pipe 2; an inlet air branch pipe 5 is fixed to the top of the inlet air cavity, and an inlet air branch pipe 12 is fixed to the top of the inlet air side. The inlet air branch pipe 5 and the inlet air branch pipe 12 are connected to a pre-filter box 7 through an inlet air main pipe 3. Through the setting of the exhaust fan 6, the exhaust gas around the device can enter the housing 1 through the pre-filter box 7 when the exhaust fan 6 works. The filter components in the housing 1 filter the exhaust gas and then enter the inner cavity of the exhaust fan 6, and are discharged through the outlet end of the exhaust fan 6. Electric ball valves 11 are provided at one ends of the inlet air branch pipe 5, the return pipe 4, and the exhaust air branch pipe 9.

[0029] The pre-filter box 7 is located outside the housing 1. At least one group of pre-filter components are provided in the inner cavity of the pre-filter box 7. The pre-filter components include a filter felt 17 and an arc-shaped baffle 18. The filter felt 17 is a conical structure, and the size of the end of the filter felt 17 away from the arc-shaped baffle 18 is larger than that of its other end. The side of the arc-shaped baffle 18 close to the filter felt 17 is an outwardly convex arc. The exhaust gas passing through the filter felt 17 can be blown onto the arc-shaped baffle 18, and the arc-shaped baffle 18 intercepts large particle impurities in the exhaust gas; an air inlet is provided on one side of the pre-filter box 7, the filter felt 17 is located on the side of the arc-shaped baffle 18 close to the air inlet, and an exhaust air channel 19 is provided on the other side of the pre-filter box 7. The exhaust air channel 19 is communicated with the inner cavity of the inlet air main pipe 3. Through the setting of the pre-filter box 7, the filter felt 17 and the arc-shaped baffle 18 can intercept large particle impurities in the exhaust gas, reduce the air dust content entering the housing 1, and further reduce the influence of large particle impurities on the filter plates 26, thereby improving the exhaust gas treatment efficiency.

[0030] The above conversion structure includes a fixing plate 27, a moving plate 29 and a blocking plate 23 fixedly connected to the housing 1. The fixing plate 27 is located between the second exhaust branch pipe 10 and the second intake branch pipe 12. The fixing plate 27 is provided with a through hole 28. One side of the fixing plate 27 close to the second exhaust branch pipe 10 is in contact with the moving plate 29. A sealing plate 22 is fixedly connected to the top of the moving plate 29. The sealing plate 22 is provided with a connection hole 25 adapted to the second exhaust branch pipe 10. The moving plate 29 can drive the sealing plate 22 to move. The connection hole 25 on the sealing plate 22 can overlap or stagger with the second exhaust branch pipe 10. When the connection hole 25 overlaps with the second exhaust branch pipe 10, the air on the exhaust side can enter the exhaust main pipe 2 through the second exhaust branch pipe 10. When the connection hole 25 is staggered with the second exhaust branch pipe 10, the second exhaust branch pipe 10 is in a blocked state.

[0031] The blocking plate 23 is located on the side of the fixing plate 27 away from the moving plate 29. The blocking plate 23 is fixedly connected to the housing 1 through a spring 21. Under the action of an external force, the position of the blocking plate 23 can be changed. And when the connection hole 25 overlaps with the second exhaust branch pipe 10, the blocking plate 23 contacts the bottom of the second intake branch pipe 12, and the blocking plate 23 blocks the second intake branch pipe 12.

[0032] A push block 14 is fixed to the top of the blocking plate 23. A second chute 13 is provided on the top of the housing 1. The push block 14 is movably connected to the inner cavity of the second chute 13, and the blocking plate 23 can always block the second chute 13. A connecting block 24 is fixedly connected to the top of the moving plate 29. A first chute 15 is provided on the top of the housing 1. The connecting block 24 is movably connected to the inner cavity of the first chute 15. The moving plate 29 can always block the first chute 15. The tops of the connecting block 24 and the push block 14 are both located outside the housing 1. A push rod 16 is fixedly connected to the top of the connecting block 24. The push rod 16 is L-shaped. One end of the push rod 16 away from the connecting block 24 is on the same straight line as the push block 14. And when the connection hole 25 overlaps with the second exhaust branch pipe 10, the other end of the push rod 16 contacts the push block 14. The push rod 16 is fixedly connected to the top of the housing 1 through a first telescopic rod 8. The first telescopic rod 8 can be an electric telescopic rod. Through the arrangement of the first telescopic rod 8, the telescopic of the first telescopic rod 8 can change the position of the push rod 16 fixedly connected thereto. When the push rod 16 moves, it can drive the moving plate 29 to move. The moving plate 29 drives the sealing plate 22 fixedly connected thereto to move, changing the position between the connection hole 25 and the second exhaust branch pipe 10. And when the push rod 16 presses the push block 14, the position between the blocking plate 23 and the second intake branch pipe 12 can be changed.

[0033] When the connection hole 25 overlaps with the second exhaust air branch pipe 10, the moving plate 29 blocks the through hole 28, and the blocking plate 23 is located below the second intake air branch pipe 12. When the moving plate 29 is flush with the side of the through hole 28 away from the connection hole 25, the moving plate 29 is flush with the side of the through hole 28 close to the connection hole 25, the blocking plate 23 is located below the second intake air branch pipe 12, or the blocking plate 23 is separated from the second intake air branch pipe 12, the sealing plate 22 seals the second exhaust air branch pipe 10. That is, only one of the through hole 28, the second exhaust air branch pipe 10, and the second intake air branch pipe 12 can be opened at a time and cannot be opened simultaneously, which is convenient for the use of the device.

[0034] The electrical components involved in this application are all prior arts. Those skilled in the art understand their connection methods. Through those skilled in the art, all the electrical components in this application are connected to their adapted power supplies through wires, and a suitable controller is selected according to the actual situation to meet the control requirements. For the specific connection and control sequence, refer to the following description. The electrical components are electrically connected in the order of their sequential operations. Their detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no further description of electrical control will be made.

[0035] Next, through an embodiment of this application, this application will be further described.

[0036] In this embodiment, the distribution state of the filter plate 26 in the housing 1 is as Figure 4 shown, Figure 4 The filter plates 26 from left to right are respectively denoted as the first filter plate, the second filter plate, and the third filter plate. In this embodiment, the first filter plate, the second filter plate, and the third filter plate can all work normally. When the device is in use, the first intake air branch pipe 5 on the left side of the first filter plate and the second exhaust air branch pipe 10 on the right side of the first filter plate are both in an open state.

[0037] When the waste gas collection and filtration device is in use, the exhaust fan 6 operates. The operation of the exhaust fan 6 causes the waste gas around the device to be collected into the pre-filter box 7. The filter felt 17 and the arc-shaped baffle 18 in the pre-filter box 7 pre-filter the waste gas, intercepting large particle impurities in the waste gas. The filtered waste gas enters the inner cavity of the housing 1 along the main air inlet pipe 3 and the first air inlet branch pipe 5. After being filtered by the first filter plate, the filtered gas is discharged into the air through the second air exhaust branch pipe 10, the main air exhaust pipe 2 and the air outlet end of the exhaust fan 6. During the use of the device, the dust sensor 20 monitors the dust content in the gas in real time. If the monitoring result shows that after being filtered by the first filter plate, the dust content in the gas decreases but does not meet the requirements, then the conversion structure between the first filter plate and the second filter plate operates. The telescopic rod 8 in the conversion structure operates. The operation of the telescopic rod 8 causes the sealing plate 22 to first block the second air exhaust branch pipe 10, and then the through hole 28 is in an open state. Another conversion structure between the second filter plate and the third filter plate operates. The operation of the another conversion structure causes the second air exhaust branch pipe 10 on the air exhaust side of the second filter plate to be in an open state, and the waste gas can be filtered by the first filter plate and the second filter plate. When the monitoring result shows that the dust content in the gas basically remains unchanged, the first air inlet branch pipe 5 is in a closed state, and the second air inlet branch pipe 12 on the air inlet side of the second filter plate is in an open state. The device uses the second filter plate to filter the waste gas. When the waste gas is filtered by the third filter plate and the first filter plate, the gas filtered by the third filter plate enters the air inlet side of the first filter plate along the return pipe 4 and is discharged through the second air exhaust branch pipe 10 on the air exhaust side of the first filter plate.

[0038] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An exhaust gas collection and filtration device, including a housing (1), characterized in that: A filter component is provided inside the inner cavity of the housing (1). The filter component divides the inner cavity of the housing (1) into an air inlet cavity and an air exhaust cavity. The air inlet cavity and the air exhaust cavity are connected by a return pipe (4). The filter component includes a filter plate (26). The filter plate (26) is snap-connected to the housing (1). A conversion structure is provided between two adjacent filter plates (26). The conversion structure divides the cavity between two adjacent filter plates (26) into an air exhaust side and an air inlet side. And the air exhaust side is located on the side of the air inlet side away from the air exhaust cavity. Dust sensors (20) are provided inside the inner cavities of the air exhaust side, the air inlet side, the air inlet cavity, and the air exhaust cavity. An air inlet branch pipe one (5) is fixed to the top of the air inlet cavity. An air inlet branch pipe two (12) is fixed to the top of the air inlet side. The air inlet branch pipe one (5) and the air inlet branch pipe two (12) are connected to a pre-filter box (7) through an air inlet main pipe (3). The pre-filter box (7) includes a filter felt (17) and an arc-shaped baffle (18). An air exhaust branch pipe one (9) is fixed to the top of the air exhaust cavity. An air exhaust branch pipe two (10) is fixed to the top of the air exhaust side. Both the air exhaust branch pipe one (9) and the air exhaust branch pipe two (10) are connected to the air inlet end of a suction fan (6) through an air exhaust main pipe (2); The conversion structure includes a fixed plate (27), a moving plate (29), and a blocking plate (23) fixedly connected to the housing (1). The fixed plate (27) is located between the air exhaust branch pipe two (10) and the air inlet branch pipe two (12). A through hole (28) is provided on the fixed plate (27). One side of the fixed plate (27) close to the air exhaust branch pipe two (10) is in contact with the moving plate (29). A sealing plate (22) is fixedly connected to the top of the moving plate (29). A connection hole (25) adapted to the air exhaust branch pipe two (10) is provided on the sealing plate (22). The blocking plate (23) is connected to the housing (1) through a spring (21). The blocking plate (23) is adapted to the air inlet branch pipe two (12). A push block (14) is fixed to the top of the blocking plate (23). A push rod (16) is fixed to the top of the moving plate (29). Both the push rod (16) and the push block (14) are movably connected to the housing (1). The push rod (16) is fixedly connected to the housing (1) through a telescopic rod one (8).

2. The exhaust gas collection and filtration device according to claim 1, characterized in that: At least one group of pre-filter components are provided inside the inner cavity of the pre-filter box (7). The pre-filter components include a filter felt (17) and an arc-shaped baffle (18). The filter felt (17) is of a conical structure. The size of the end of the filter felt (17) away from the arc-shaped baffle (18) is larger than that of its other end. The side of the arc-shaped baffle (18) close to the filter felt (17) is an arc protruding outward; An air inlet is provided on one side of the pre-filter box (7). The filter felt (17) is located on the side of the arc-shaped baffle (18) close to the air inlet. An air exhaust channel (19) is provided on the other side of the pre-filter box (7). The air exhaust channel (19) is communicated with the inner cavity of the air inlet main pipe (3).

3. The waste gas collection and filtration device according to claim 1, characterized in that: The push rod (16) is L-shaped. A connecting block (24) is fixedly connected to the bottom of one end of the push rod (16). The connecting block (24) is fixedly connected to the top of the moving plate (29). The other end of the push rod (16) is in the same straight line as the push block (14). When the connecting hole (25) overlaps with the second exhaust air branch pipe (10), the other end of the push rod (16) contacts the push block (14).

4. An exhaust gas collection and filtration device according to claim 3, characterized in that: A first chute (15) adapted to the connecting block (24) and a second chute (13) adapted to the push block (14) are provided at the top of the housing (1). The moving plate (29) seals the first chute (15), and the blocking plate (23) seals the second chute (13).

5. An exhaust gas collection and filtration device according to claim 4, characterized in that: When the connecting hole (25) overlaps with the second exhaust air branch pipe (10), the moving plate (29) blocks the through hole (28), and the blocking plate (23) is located below the second intake air branch pipe (12). When the moving plate (29) is flush with the side of the through hole (28) away from the connecting hole (25), the moving plate (29) is flush with the side of the through hole (28) close to the connecting hole (25), the blocking plate (23) is located below the second intake air branch pipe (12), or the blocking plate (23) is separated from the second intake air branch pipe (12), the sealing plate (22) blocks the second exhaust air branch pipe (10).

6. The waste gas collection and filtration device according to claim 1, wherein: Electric ball valves (11) are provided at one ends of the first intake air branch pipe (5), the reflux pipe (4), and the first exhaust air branch pipe (9).

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