Multi-stage waste gas filter

Abstract

The utility model provides a multi-stage waste gas filter. The multi-stage waste gas filter comprises a shell and a plurality of filter boxes, an air inlet and an air outlet are respectively formed in the left and right side walls of the An air inlet cavity, a filtering cavity and an air outlet cavity are formed in the shell; a first vertical partition plate is arranged between the air inlet cavity and the filter cavity, and a second vertical partition plate is arranged between the filter cavity and the air outlet cavity; a first communicating port is formed in the first vertical partition plate, and a second communicating port is formed in the second vertical partition plate; the filter boxes are inserted between the two vertical partition plates in a layered manner, and the two communicating ports are staggered in the height direction; the filter boxes are located in a height space between the two communicating ports, and the diameters of filter holes of the filter boxes are gradually reduced in the waste gas flowing direction; a horizontal sealing plate positioned above each filter box is arranged between the two vertical partition plates; a first air passing hole is formed in the horizontal sealing plate; the filter box is in compression joint with or separated from the horizontal sealing plate under the action of the sealing adjusting assembly, so that the periphery of the first gas passing hole is sealed or unsealed, and an exhaust path of unfiltered waste gas is blocked.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection dust removal, and specifically relates to a multi-stage exhaust gas filter. Background Art

[0002] Some industries generate a large amount of waste gas during the production process. Based on environmental protection requirements, filters are needed to filter and purify the waste gas to reduce the harmful substances in the waste gas to below the standard value.

[0003] However, after the filter has been used for a period of time, a large amount of dust particles will accumulate in the filter element of the filter, affecting the filtering effect, and the filter element needs to be replaced regularly; in order to reduce the difficulty of replacing the filter element, drawer-type filters came into being; however, since each filter box and filter box in the drawer-type filter are slidingly matched, there will inevitably be a sliding gap at the sliding fit, causing part of the exhaust gas to flow directly along the gap between each filter box and the filter box to the outlet of the filter box and be discharged without passing through the filter box, thereby affecting the filtering quality of the exhaust gas. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a multi-stage exhaust gas filter, which can prevent the discharge of unfiltered exhaust gas and improve the filtering quality of the exhaust gas.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a multi-stage exhaust gas filter, including a hollow shell and a plurality of filter boxes arranged in sequence along the height direction; a socket for plugging and unplugging each filter box and a sealing door for sealing each socket are provided on the front wall of the shell; an air inlet and an air outlet are respectively provided on the two side walls of the shell that are arranged opposite to each other in the left and right directions; an air inlet chamber, a filter chamber and an air outlet chamber are sequentially arranged in the shell, the air inlet chamber is connected with the air inlet, and the air outlet chamber is connected with the air outlet; a first vertical partition is arranged between the air inlet chamber and the filter chamber, and a second vertical partition is arranged between the filter chamber and the air outlet chamber; a first connecting port connecting the air inlet chamber and the filter chamber is provided on the first vertical partition, and a connecting port connecting the air outlet chamber and the filter chamber is provided on the second vertical partition A second connecting port between the air outlet chamber and the filter chamber; each filter box is inserted between two vertical partitions, and the first connecting port and the second connecting port are staggered in the height direction; the position of the filter box between the two vertical partitions is located in the height space between the two connecting ports, and the filter hole diameter of each filter box gradually decreases along the flow direction of the exhaust gas; a horizontal sealing plate is fixedly arranged between the two vertical partitions and located above each filter box, and a first air hole is provided at a position of the horizontal sealing plate corresponding to the filter area in the filter box; the filter box is crimped or separated from the corresponding horizontal sealing plate under the action of the sealing adjustment component to achieve sealing or sealing release around the first air hole, so as to avoid the gap around the filter box being connected to the air outlet through the first air hole, thereby ensuring the purification quality of the exhaust gas discharged from the air outlet.

[0006] Preferably, the filter box and the horizontal sealing plate are sealed by a sealing ring.

[0007] Preferably, the filter box is connected to the vertical partitions on both sides through a first guide mechanism; the first guide mechanism includes a first sliding component and a second sliding component that slide together in the front-to-back direction; the first sliding component is fixedly connected to the filter box; the second sliding component is installed on the corresponding vertical partition through a second guide mechanism; the second guide mechanism includes a plurality of guide grooves arranged on the second sliding component, and a guide shaft located in the guide groove and connected to the vertical partitions on the corresponding sides; the guide groove cooperates with the corresponding guide shaft to realize the up and down movement of the second sliding component; the sealing adjustment assembly includes a telescopic drive device connected to the second sliding component; the second sliding component moves up and down under the action of the telescopic drive device to make the filter box approach or move away from the horizontal sealing plate, so as to realize the sealing and sealing release around the first air hole.

[0008] Preferably, the filter box is connected to the vertical partitions on both sides through a first guide mechanism; the first guide mechanism includes a first sliding component and a second sliding component that slide and cooperate in the front-to-back direction; the first sliding component is fixedly connected to the filter box; the second sliding component is installed on the corresponding vertical partition through a second guide mechanism; the second guide mechanism includes a plurality of guide grooves arranged on the second sliding component, and a guide shaft located in the guide groove and connected to the vertical partitions on the corresponding sides; the guide groove is inclined from bottom to top in a direction away from the socket; a pressure plate is formed at the front end of the second sliding component; the pressure plate is located in front of the shell, and a vertical avoidance hole is provided on the pressure plate; the sealing adjustment assembly includes a sealing adjustment bolt; the bolt rod of the sealing adjustment bolt passes through the vertical avoidance hole of the pressure plate and is threadedly connected to the front wall of the shell, and the bolt head of the sealing adjustment bolt cannot pass through the vertical avoidance hole; the The sealing door is provided with an avoidance groove for avoiding the pressure plate and the sealing adjustment bolt; when the forward rotation of the sealing adjustment bolt causes the bolt head to move toward the direction close to the front wall of the shell, the bolt head will exert a backward pressure on the pressure plate, and under the action of this pressure, the guide groove on the second sliding component will move obliquely upward relative to the guide shaft, so that the second sliding component will move obliquely upward, thereby causing the filter box to move obliquely upward to a position where it is crimped with the horizontal sealing plate above it, so as to complete the sealing around the first air hole; when the reverse rotation of the sealing adjustment bolt causes the bolt head to move away from the front wall of the shell, the pressure plate is no longer subjected to the pressure of the bolt head. At this time, the second sliding component only bears the gravity of the filter box, and under the action of this gravity, the guide groove on the second sliding component will move obliquely downward relative to the guide shaft, so that the second sliding component will move obliquely downward, thereby completely separating the filter box from the horizontal sealing plate above it, thereby avoiding friction between the filter box and the horizontal sealing plate when the filter box is pulled out.

[0009] Preferably, the second sliding components on both sides of the filter box are connected by a rear end connecting plate, so that the synchronization of the movement of the second sliding components on both sides of the filter box can be ensured without adjusting the adjustment bolts on both sides of the filter box at the same time, thereby reducing the difficulty of adjusting the filter box position.

[0010] Preferably, a horizontal support plate located below each filter box is fixed between the two vertical partitions, and a second bottom air hole is provided on the horizontal support plate at a position corresponding to the filter area inside the filter box; the horizontal sealing plate above the filter box, the horizontal support plate below the filter box and the two vertical partitions together form a slot for inserting the filter box, and the height of the slot is greater than the height of the filter box; the horizontal support plate is used to provide auxiliary support for the filter box during the insertion and extraction process, thereby reducing the labor intensity of the extraction personnel.

[0011] Preferably, the height position of the first connecting port is lower than the height position of the second connecting port, and the bottom of the shell is provided with a dust outlet connected to the filter chamber; since the first connecting port is lower than the second connecting port, the exhaust gas can only be filtered through each filter box in sequence from bottom to top. Therefore, a part of the dust filtered out by the bottom filter box will fall to the bottom of the shell under the action of its own weight, thereby extending the single service cycle of the bottom filter box.

[0012] Preferably, a differential pressure sensor is provided on the top of the housing.

[0013] Preferably, the sealing door is pressed against the front wall of the housing by a screw press to prevent exhaust gas in the filter box from leaking out.

[0014] Preferably, the screw press comprises a screw press rod and a screw press head at one end of the screw press rod; connecting seats are arranged at the top and bottom of the sealing door; the number of the connecting seats is the same as the number of the screw presses, and a through hole is arranged on the connecting seat; the screw press rod of the screw press passes through the through hole of the connecting seat and is threadedly connected to the front wall of the shell, and the screw press head cannot pass through the through hole of the corresponding connecting seat; the front and rear positions of the screw press head are adjusted by screwing the screw press, so as to facilitate pressing the connecting seat against the front wall of the shell or separating the connecting seat from the front wall of the shell, thereby realizing the pressing and releasing of the sealing door.

[0015] As mentioned above, the multi-stage exhaust gas filter of the utility model has the following beneficial effects:

[0016] The present application divides the internal space of the shell into an air inlet chamber, a filter chamber and an air outlet chamber by means of a first vertical partition and a second vertical partition arranged at intervals, and a first connecting port connecting the air inlet chamber and the filter chamber is arranged on the first vertical partition, and a second connecting port connecting the filter chamber and the air outlet chamber is arranged on the second vertical partition, and the first connecting port and the second connecting port are staggered in the height direction; and each filter box is layered and inserted between the two vertical partitions, and is located within the height range between the first connecting port and the second connecting rear port; such an arrangement allows the exhaust gas to flow into the air inlet chamber through the air inlet, first enter the filter chamber through the first connecting port, and pass through each filter box in the filter chamber in turn for step-by-step filtration, and the exhaust gas that has completed the step-by-step filtration flows into the air outlet chamber through the second connecting port, and is finally discharged through the air outlet; therefore On the basis of retaining the pull-out filter box, the present application realizes multi-stage filtration of exhaust gas, effectively improving the exhaust gas filtration effect; in addition, the present application fixes a horizontal sealing plate located above each filter box between the two vertical plates, and each horizontal sealing plate is within the height range between the first connecting port and the second connecting port; when the filter box is inserted between the two vertical partitions, the sealing adjustment component can be used to fine-tune the height position of the inserted filter box so that the filter box is crimped or separated from the horizontal sealing plate thereon to seal or release the seal around the first air hole; when the first air hole is sealed by the filter box, the gap around the filter box can be prevented from being connected to the air outlet through the first air hole, thereby blocking the flow path of the exhaust gas being discharged directly from the air outlet without being filtered by the filter box, effectively improving the cleanliness of the exhausted exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional exploded view of the multi-stage exhaust gas filter box.

[0018] Figure 2 This is a three-dimensional exploded view of the multi-stage exhaust gas filter box after removing the sealing door.

[0019] Figure 3 This is the main cross-sectional view of the multi-stage exhaust gas filter box.

[0020] Figure 4 It is a cross-sectional view of the insertion and matching of the filter box and the vertical partitions on both sides.

[0021] Figure 5 An exploded view of the filter box and guide mechanism.

[0022] Figure 6 It is a connection diagram of the second sliding parts on both sides of the filter box.

[0023] Figure 7 for Figure 2 A three-dimensional view after removing the left and right side walls of the shell and the filter box.

[0024] Figure 8 for Figure 7 main view.

[0025] Fig. 9 for Figure 8 AA section view.

[0026] Fig.10 for Figure 8 A partial enlarged view at point B.

[0027] Fig.11 Schematic diagram of the cooperation between the filter box and the telescopic drive device in another embodiment.

[0028] Fig.12 Schematic diagram of the slot formed by the horizontal sealing plate above the filter box, the horizontal support plate below the filter box and the vertical partitions on both sides.

[0029] Fig.13 It is a structural schematic diagram of a sealed door.

[0030] Fig.14 It is a structural schematic diagram of the screw compressor.

[0031] Description of Reference Numerals

[0032] Shell 1, air inlet 1a, air outlet 1b, socket 1c, vertical support 11, sealing door 12, avoidance groove 121, transverse reinforcement rib 1211, connecting seat 122, air inlet chamber 131, filter chamber 132, air outlet chamber 133, filter box 2, box body 21, filter element 22, screw presser 3, screw pressing rod 31, screw pressing head 32, limit nut 33, first vertical partition 41a, second vertical partition 41b, first connecting port 411, second connecting port 412, horizontal sealing plate 42, first air hole 421, horizontal support plate 43, second air hole 431, first sliding component 61, second sliding component 62, guide groove 621, guide shaft 6211, pressure plate 622, vertical avoidance hole 6221, rear end connecting plate 623, sealing adjustment bolt 71, telescopic drive device 72, differential pressure sensor 8. DETAILED DESCRIPTION

[0033] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0034] See also Figures 1 to 14It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0035] For the convenience of description, the application defines the height direction of the housing 1 as the up-down direction, the width direction of the housing 1 (i.e., the plugging direction of the filter cartridge 2) as the front-to-back direction, and the length direction of the filter cartridge as the left-to-right direction; based on this, Figure 3 The upper side and the lower side of the paper are respectively the upper direction and the lower direction, the left side and the right side of the paper are respectively the left direction and the right direction, and the outer side and the inner side of the paper are respectively the front direction and the rear direction.

[0036] Embodiment 1

[0037] like Figures 1 to 4As shown, the multi-stage exhaust gas filter provided in the first embodiment includes a hollow shell 1 and a plurality of filter cartridges 2 sequentially inserted in the height direction; a socket 1c for plugging and unplugging each filter cartridge 2 and a sealing door 12 for sealing each socket 1c are provided on the front wall of the shell 1; an air inlet 1a and an air outlet 1b are respectively provided on the two side walls of the shell 1 oppositely arranged in the left and right directions (i.e., the left wall of the shell 1 and the right wall of the shell 1), and a first vertical partition 41 is provided in the shell 1 in the left and right directions. a and a second vertical partition 41b; the two vertical partitions divide the internal space of the shell 1 into an air inlet chamber 131, a filter chamber 132 and an air outlet chamber 133 in the left-right direction; wherein the air inlet chamber 131 is connected to the air inlet port 1a, and the air outlet chamber 133 is connected to the air outlet port 1b; the first vertical partition 41a is provided with a first connecting port 411 connecting the air inlet chamber 131 and the filter chamber 132, and the second vertical partition 41b is provided with a connecting port 412 connecting the air outlet chamber 133 and the air inlet chamber 131; The second connecting port 412 of the filter chamber 132; the first connecting port 411 and the second connecting port 412 are arranged alternately in the height direction, and each filter box 2 is inserted between the two vertical partitions through the corresponding socket 1c; the insertion position of each filter box 2 between the two vertical partitions is located in the height space between the first connecting port 411 and the second connecting port 412, so that the exhaust gas flows through each filter box 2 in sequence from top to bottom or from bottom to top; in order to achieve multi-stage filtration, the filter hole diameter of each filter box 2 needs to be gradually reduced along the exhaust gas flow direction; in this embodiment, the height position of the first connecting port 411 is lower than the height position of the second connecting port 412, so that the dust particles filtered out by the lowest filter box 2 can fall to the bottom of the shell under the action of its own weight, thereby extending the service life of the lowest filter box 2 and achieving the purpose of reducing the replacement frequency of the filter box 2; in addition, in order to facilitate the cleaning of dust particles at the bottom of the shell, a dust outlet connected to the filter chamber 132 can be opened at the bottom of the shell.

[0038] like Figure 5 As shown, the filter box 2 includes a box body 21 and a filter element 22 placed in the box body 21; the filtering range of the filter element 22 is the filtering area of ​​the filter box 2; the top of the filter element 22 protrudes from the top of the box body 21, and a ventilation hole is provided at the bottom of the box body 21 corresponding to the filtering area, so that the gas can flow into or out of the filtering area through the ventilation hole.

[0039] Since the filter box 2 can be inserted into or withdrawn from the housing 1 through the corresponding socket 1c, the filter box 2 and the two vertical partitions can be plugged in. Therefore, there will inevitably be a matching gap at the plug-in matching position, resulting in part of the exhaust gas not being filtered by the filter box 2 but directly flowing to the air outlet 1b along the matching gap of each filter box 2, which greatly affects the cleanliness of the gas discharged from the air outlet 1b.

[0040] like Figure 3 and Figure 4As shown, in order to improve the cleanliness of the exhaust at the air outlet 1b, a plurality of horizontal sealing plates 42 are fixedly arranged from top to bottom between the two vertical partitions, and the number of the horizontal sealing plates 42 is the same as the number of the filter boxes 2; the fixed position of each horizontal sealing plate 42 between the two vertical partitions is located in the height space between the first connecting port 411 and the second connecting port 412, and each horizontal sealing plate 42 is respectively located above each filter box 2 between the two vertical partitions; the horizontal sealing plate 42 and the inner filter area of ​​the filter box 2 (i.e., the filter area of ​​the filter box 2) are connected to each other. A first air hole 421 is provided at a position corresponding to the horizontal sealing plate 42 to achieve communication between the space above the horizontal sealing plate 42 and the filter area in the filter box 2; when the filter box 2 is inserted into the housing 1 through the socket 1c, the filter box 2 is pressed or separated from the corresponding horizontal sealing plate 42 under the action of the sealing adjustment component to achieve sealing or sealing release around the first air hole 421; when the surroundings of each first air hole 421 are sealed by the corresponding filter box 2, most of the exhaust gas can alternately pass through the filter area of ​​each filter box 2 and each first air hole 421 is used to complete the multi-stage filtration and discharge of the exhaust gas, while a small amount of unfiltered exhaust gas in the gap around the filter box 2 cannot flow to the air outlet 1b through the first air hole 421, thereby effectively blocking the outflow of unfiltered exhaust gas and improving the cleanliness of the gas discharged from the air outlet 1b; when the seal around the first air hole 421 is released, the filter box 2 below is completely separated from the horizontal sealing plate 42 above, thereby avoiding friction with the horizontal sealing plate 42 above the filter box 2 when it is pulled out; in this embodiment, the filter box 2 and the horizontal sealing plate 42 are preferably sealed by a sealing ring; for example, the horizontal sealing plate 42 includes a rigid plate and a sealing ring located around the first air hole 421, and the sealing around the first air hole 421 is achieved by squeezing the sealing ring by the filter box 2; for another example, the horizontal sealing plate 42 is a rigid plate, and a sealing ring is set at the top of the filter box 2 corresponding to the position of the first air hole 421, and the sealing around the first air hole 421 is achieved by squeezing the sealing ring by the filter box 2; the sealing ring is made of existing elastic materials such as rubber and silicone.

[0041] It can be seen that in the shell 1, the filter box 2 can be moved from the first position to the second position or from the second position to the first position; wherein the first position is the initial position of the filter box 2 inserted into the shell 1, and the second position is the position where the filter box 2 and the horizontal sealing plate 42 thereon are crimped to seal around the first air hole 421.

[0042] When the filter box 2 moves upward from the first position to the second position, it will be crimped with the horizontal sealing plate 42 thereon to complete the sealing around the first air hole 421; when the filter box 2 moves downward from the second position to the first position, it will be in a separated state from the horizontal sealing plate 42 thereon to avoid friction with the horizontal sealing plate 42 when the filter box 2 enters or exits the shell 1 horizontally.

[0043] In order to ensure the stability of the horizontal pulling of the filter box 2, Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the filter box 2 is connected to the vertical partitions on both sides through a first guide mechanism; the first guide mechanism includes a first sliding component 61 and a second sliding component 62 that slide and cooperate in the front-to-back direction; the first sliding component 61 is fixedly connected to the filter box 2; the second sliding component 62 is installed on the corresponding vertical partition through a second guide mechanism; the second guide mechanism includes a plurality of guide grooves 621 arranged on the second sliding component 62, and a guide shaft 6211 located in the guide groove 621 and connected to the corresponding side vertical partition; the guide groove 621 is inclined from bottom to top in a direction away from the socket 1c, so that the second sliding component 62 can move obliquely upward or obliquely downward; a pressure plate 622 is formed at the front end of the second sliding component 62; the pressure plate 622 is located in front of the shell 1, and a vertical avoidance hole 6221 is provided on the pressure plate 622; the sealing adjustment assembly includes a sealing adjustment bolt 71; the bolt rod of the sealing adjustment bolt 71 passes through the vertical avoidance hole 6221 of the pressure plate 622 and is threaded on the front wall of the shell 1 When the sealing adjusting bolt 71 is screwed to move the bolt head of the sealing adjusting bolt backward (i.e., move in the direction close to the front wall of the shell), the bolt head of the sealing adjusting bolt 71 will exert a backward horizontal pressure on the pressure plate 622 connected to the second sliding component 62. Under the action of this pressure, the second sliding component 62 can move obliquely upward to crimp the filter box 2 with the horizontal sealing plate 42 thereon; when the sealing adjusting bolt 71 is screwed to move the bolt head of the sealing adjusting bolt forward (i.e., move in the direction away from the front wall of the shell), the horizontal pressure on the second sliding component disappears, and it will move obliquely downward under the action of its own weight and the gravity of the filter box 2 to separate the filter box 2 from the horizontal sealing plate 42 thereon; in order to avoid gas leakage in the shell 1, the sealing door 12 should cover all the sockets 1c and the pressure plate 622, and the sealing door 12 is provided with an avoidance groove 121 for avoiding the pressure plate 622 and the sealing adjusting bolt 71.

[0044] Since the bolt head of the sealing adjustment bolt 71 is located outside the housing 1 , it has the advantage of being easy to adjust.

[0045] like Fig.13 As shown, the avoidance groove 121 can cover all the sockets 1c; in order to ensure the strength of the sealed door 12, reinforcing ribs can be set in the avoidance groove 121; the reinforcing ribs include a plurality of transverse reinforcing ribs 1211 arranged at intervals along the vertical direction, and the plurality of transverse reinforcing ribs 1211 divide the space in the avoidance groove 121 into independent small spaces respectively connected to each socket 1c, so that the sealing around each socket 1c can be achieved by utilizing the sealing fit between the transverse reinforcing ribs 1211 and the front wall of the shell 1, and the sealing fit between the outer periphery of the avoidance groove 121 and the front wall of the shell 1.

[0046] In order to reduce the difficulty of adjustment and ensure the stability of the upward and downward movement of the filter box 2, Figure 6 As shown, the second sliding components 62 on both sides of the same filter box 2 are connected by a rear end connecting plate 623; in this way, when the filter box 2 needs to be moved up to seal around the first air hole 421, there is no need to adjust the sealing adjustment bolts 71 on both sides of the filter box 2 at the same time; only one sealing adjustment bolt 71 needs to be in a relaxed state, and the other sealing adjustment bolt 71 can be screwed alone to make the second sliding components 62 on both sides of the filter box 2 move up synchronously.

[0047] Preferably, if Figure 3 , Figure 7 , Fig. 9 , Fig.10 and Fig.12 As shown, a plurality of horizontal support plates 43 are fixedly arranged between the two vertical partitions from top to bottom, and the number of the horizontal support plates 43 is the same as the number of the filter boxes 2; the fixed position of each horizontal support plate 43 between the two vertical partitions is located in the height space between the first connecting port 411 and the second connecting port 412, and each horizontal support plate 43 is respectively located below each filter box 2 between the two vertical partitions; a second air hole 431 is provided at a position of the horizontal support plate 43 corresponding to the filter area in the filter box 2 (i.e., the filter area of ​​the filter box 2), so as to realize the horizontal support plate 43 The lower space is connected with the filter area in the filter box 2; the horizontal sealing plate 42 above the filter box 2, the horizontal support plate 43 below the filter box 2 and the two vertical partitions together enclose a slot for the filter box 2 to be inserted; in this way, when the filter box 2 is inserted into the slot through the socket 1c, the horizontal support plate 43 at the bottom of the slot can provide auxiliary support for it, thereby reducing the labor intensity of the insertion personnel; in addition, the height dimension of the slot needs to be greater than the height dimension of the filter box 2, so as to facilitate the adjustment of the height position of the filter box 2 in the slot to achieve sealing or releasing the seal around the first air hole 421,

[0048] Preferably, if Figure 1 and Figure 2 As shown, a differential pressure sensor 8 is provided on the top of the housing 1, and the differential pressure sensor 8 detects the pressure difference between the air inlet cavity 131 and the air outlet cavity 133 to determine whether each filter box 2 in the filter cavity 132 needs to be replaced.

[0049] Preferably, in order to facilitate the centralized collection and processing of dust particles discharged from the dust outlet, a column 11 is provided at the bottom of the shell 1 for support so that the shell 1 is suspended in the air.

[0050] like Figure 1 , Fig.13 and Fig.14As shown, in order to achieve the compression and sealing of the sealing door 12, a plurality of connecting seats 122 need to be set at the top and bottom of the sealing door 12, and a spiral presser 3 is installed on each connecting seat 122; the spiral presser 3 includes a spiral pressing rod 31 and a spiral pressing head 32 located at one end of the spiral pressing rod 31; the connecting seat 122 is provided with a through hole for the spiral pressing rod 31 to pass through, and the through hole does not allow the spiral pressing head 32 to pass through; in this way, when the spiral pressing rod 31 of the bolt presser 3 passes through the through hole of the connecting seat 122 and is threadedly connected to the front wall of the shell 1, it is only necessary to adjust the screwing depth of the bolt presser 3 to achieve the front and rear adjustment of the position of the spiral pressing head 32, so as to facilitate the forward movement of the spiral pressing head 32 to press the connecting seat 122 against the front wall of the shell 1, so that the sealing door 12 is in close contact with the front wall of the shell 1 to prevent the gas in the shell 1 from leaking out.

[0051] Furthermore, the screw presser 3 includes a limiting nut 33 screwed on the screw pressing rod 31, the limiting nut 33 is located on the side of the connecting seat 122 away from the screw pressing head 132, and the connecting seat 122 is provided with a accommodating groove for accommodating the limiting nut 133 to avoid separation of the screw presser 3 from the sealing door 12 and reduce the probability of loss of the screw presser 3.

[0052] Embodiment 2

[0053] The difference between this embodiment and the first embodiment lies only in the specific structure of the sealing adjustment assembly.

[0054] like Fig.11 As shown, in this embodiment, the sealing adjustment assembly includes a tilted telescopic drive device 72, the movable end of the telescopic drive device 72 is connected to the second sliding component 62, and the tilting direction of the telescopic drive device 72 is consistent with the tilting direction of the guide groove 621.

[0055] The telescopic drive device 72 can be an automatic telescopic drive device such as an electric push rod, an air cylinder, or a hydraulic cylinder, or can be manually telescopic drive devices such as a screw-type telescopic rod, without limitation; for a device for rotating to adjust the telescopic degree such as a screw-type telescopic rod (i.e., a telescopic rod including a fixed tube and a telescopic rod threadedly connected to the fixed tube), its movable end needs to be rotatably connected to the second sliding component 62 so that the movable end can rotate freely around the telescopic direction of the movable end.

[0056] Embodiment 3

[0057] The difference between this embodiment and the first embodiment lies only in the structure of the sealing adjustment assembly and the setting direction of the guide groove 621 .

[0058] In this embodiment, the guide groove 621 is vertically arranged, and the sealing adjustment assembly includes a vertically arranged telescopic driving device 72 , and the movable end of the telescopic driving device 72 is connected to the second sliding component 62 .

[0059] Embodiment 4

[0060] The difference between this embodiment and the first embodiment is only the structure of the bolt presser 3 .

[0061] In this embodiment, a plurality of connecting seats 122 are required to be provided at the top and bottom of the sealing door 12, and each connecting seat 122 is provided with a notch; the screw presser 3 includes a screw pressing rod 31 and a screw pressing head 32 which are separately provided; one end of the screw pressing rod 31 passes through the corresponding notch and is fixedly connected to the front wall of the shell 1, and the screw pressing head 32 is threadedly connected to the other end of the screw pressing rod 31 to press the connecting seat 122 against the front wall of the shell 1, so that the sealing door 12 is in close contact with the front wall of the shell 1 to prevent gas leakage in the shell 1.

[0062] In summary, the utility model effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A multi-stage exhaust gas filter, comprising a hollow shell (1) and a plurality of filter boxes (2) arranged in sequence along a height direction; a socket (1c) for plugging and unplugging each filter box (2) and a sealing door (12) for sealing each socket (1c) are provided on the front wall of the shell (1); an air inlet (1a) and an air outlet (1b) are respectively provided on two side walls of the shell (1) arranged opposite to each other in the left and right directions; an air inlet cavity (131), a filter cavity (132) and an air outlet cavity (133) are sequentially provided in the shell (1), the air inlet cavity (131) is communicated with the air inlet (1a), and the air outlet cavity (133) is communicated with the air outlet (1b); characterized in that: A first vertical partition (41a) is provided between the air inlet chamber (131) and the filter chamber (132), and a second vertical partition (41b) is provided between the filter chamber (132) and the air outlet chamber (133); the first vertical partition (41a) is provided with a first communication port (411) for connecting the air inlet chamber (131) and the filter chamber (132), and the second vertical partition (41b) is provided with a second communication port (412) for connecting the air outlet chamber (133) and the filter chamber (132); each filter box (2) is inserted between the two vertical partitions, and the first communication port (411) and the second communication port (412) are connected to each other. 412) are arranged alternately in the height direction; the positions of the filter boxes (2) between the two vertical partitions are all located in the height space between the two connecting ports, and the filter hole diameter of each filter box (2) gradually decreases along the flow direction of the exhaust gas; a horizontal sealing plate (42) is fixedly arranged between the two vertical partitions and located above each filter box (2), and a first air hole (421) is provided at a position of the horizontal sealing plate (42) corresponding to the filter area inside the filter box (2); the filter box (2) is crimped or separated from the corresponding horizontal sealing plate (42) under the action of the sealing adjustment component to achieve sealing or sealing release around the first air hole (421).

2. A multi-stage exhaust gas filter according to claim 1, characterized in that: The filter box (2) and the horizontal sealing plate (42) are sealed via a sealing ring.

3. A multi-stage exhaust gas filter according to claim 1 or 2, characterized in that: The filter box (2) is connected to the vertical partitions on both sides through a first guide mechanism; the first guide mechanism includes a first sliding component (61) and a second sliding component (62) that slide and cooperate in the front-to-back direction; the first sliding component (61) is fixedly connected to the filter box (2); the second sliding component (62) is installed on the corresponding vertical partition through a second guide mechanism; the second guide mechanism includes a plurality of guide grooves (621) arranged on the second sliding component (62), and a guide shaft (6211) located in the guide groove (621) and connected to the corresponding side vertical partition; the guide groove (621) cooperates with the corresponding guide shaft (6211) to realize the up and down movement of the second sliding component (62); the sealing adjustment component includes a telescopic drive device (72) connected to the second sliding component (62); the second sliding component (62) moves up and down under the action of the telescopic drive device (72) to make the filter box (2) approach or move away from the horizontal sealing plate (42).

4. A multi-stage exhaust gas filter according to claim 1 or 2, characterized in that: The filter box (2) is connected to the vertical partitions on both sides through a first guide mechanism; the first guide mechanism includes a first sliding component (61) and a second sliding component (62) that are slidably matched in the front-back direction; the first sliding component (61) is fixedly connected to the filter box (2); the second sliding component (62) is installed on the corresponding vertical partition through a second guide mechanism; the second guide mechanism includes a plurality of guide grooves (621) provided on the second sliding component (62), and a guide shaft (6211) located in the guide grooves (621) and connected to the corresponding side vertical partition; the guide The groove (621) is inclined from bottom to top in a direction away from the socket (1c); a pressure plate (622) is formed at the front end of the second sliding component (62); the pressure plate (622) is located in front of the shell (1), and a vertical avoidance hole (6221) is provided on the pressure plate (622); the sealing adjustment assembly includes a sealing adjustment bolt (71); the bolt rod of the sealing adjustment bolt (71) passes through the vertical avoidance hole (6221) of the pressure plate (622) and is threadedly connected to the front wall of the shell (1), and the bolt head of the sealing adjustment bolt (71) cannot pass through the vertical avoidance hole (6221); The sealing door (12) is provided with an escape groove for escaping the pressure plate (622) and the sealing adjustment bolt (71).

5. A multi-stage exhaust gas filter according to claim 4, characterized in that: The second sliding components (62) on both sides of the filter box (2) are connected via a rear end connecting plate (623).

6. The multi-stage exhaust gas filter according to claim 1, characterized in that: A horizontal support plate (43) located below each filter box (2) is fixedly arranged between the two vertical partitions, and a second air hole (431) is arranged on the horizontal support plate (43) at a position corresponding to the filter area inside the filter box (2); the horizontal sealing plate (42) above the filter box (2), the horizontal support plate (43) below the filter box (2) and the two vertical partitions together form a slot for inserting the filter box (2), and the height dimension of the slot is greater than the height dimension of the filter box (2).

7. The multi-stage exhaust gas filter according to claim 1, characterized in that: The height position of the first connecting port (411) is lower than the height position of the second connecting port (412), and a dust discharge port communicating with the filter cavity (132) is provided at the bottom of the housing (1).

8. The multi-stage exhaust gas filter according to claim 1, characterized in that: A differential pressure sensor (8) is provided on the top of the housing (1).

9. The multi-stage exhaust gas filter according to claim 1, characterized in that: The sealing door (12) is pressed against the front wall of the housing (1) by a screw press (3).

10. The multi-stage exhaust gas filter according to claim 9, characterized in that: The screw press (3) comprises a screw press rod (31) and a screw press head (32) located at one end of the screw press rod (31); the top and bottom of the sealing door (12) are provided with connecting seats (122); the number of the connecting seats (122) is the same as the number of the screw presses (3), and the connecting seats (122) are provided with through holes; the screw press rod (31) of the screw press (3) passes through the through hole of the connecting seat (122) to be threadedly connected to the front wall of the housing (1), and the screw press head (32) cannot pass through the through hole of the corresponding connecting seat (122).

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