Filtering structure and filtering device with same

Abstract

The utility model relates to the technical field of filtering devices, in particular to a filtering structure and a filtering device with the filtering structure, and aims to solve the problems that an existing filtering device cannot effectively block moisture in large-flow gas and cannot realize an automatic drainage function of a filter element. In order to achieve the purpose, the filtering structure comprises a water filtering assembly, a bearing plate, an extrusion plate and a driving assembly, the water filtering assembly is arranged between the bearing plate and the extrusion plate; the bearing plate is used for bearing the water filtering assembly, and the extruding plate is used for extruding the water filtering assembly; the driving assembly is connected with the extrusion plate, and the driving assembly can drive the extrusion plate to move in the direction towards the water filtering assembly so as to extrude the water filtering assembly. The filtering structure disclosed by the utility model can effectively block moisture in high-flow gas, and can realize an automatic drainage function of the water filtering assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter device technical field, specifically provide filter structure and have its filter device. BACKGROUND

[0002] The boron expansion tail exhaust system is to dissolve and absorb the mixed process tail gas containing B2O3 and chlorine through the water in the filter system, so as to reduce the accumulation of B2O3 white powder to block the exhaust pipeline of the boron expansion equipment, and prevent the leakage of chlorine and B2O3 in the air to release microboric acid and hydrogen chloride gas to cause the metal parts in the boron expansion equipment to be easily rusted and corroded and the electrical elements to be aged quickly.

[0003] When the mixed process tail gas is filtered through the boron expansion tail exhaust system, the water in the system will be taken out as small droplets and water vapor when the large-flow mixed gas passes through the water, and this part of water vapor will be sucked into the vacuum pump along with the airflow, causing the diaphragm and valve of the pump to deform and affecting the service life of the vacuum pump.

[0004] At present, the filter device of the boron expansion tail exhaust system adopts a conventional cooling liquid-accumulating bottle and a fiber filter, the cooling liquid-accumulating bottle has a curved elongated flow channel and a quartz material Rasai ring, and the fiber filter is provided with a PTFE material filter core, the filter core is only suitable for filtering dry gas, and the service life of the filter core will be reduced to 20% for the gas containing water vapor; based on the boron expansion tail exhaust system using water for filtering, the filter device cannot effectively block the water in the large-flow gas, cannot realize the automatic water drainage function of the filter core, and cannot solve the problem of water vapor entering the vacuum pump to reduce the service life of the pump.

[0005] In view of the problems existing in the prior art, the technical personnel in the field urgently need a filter structure and a filter device with the same. INVENTION CONTENTS

[0006] The utility model aims at solving the above technical problem, that is, solving the problems that the existing filter device cannot effectively block the water in the large-flow gas and cannot realize the automatic water drainage function of the filter core.

[0007] In a first aspect, the utility model provides a filter structure, which comprises a water filter assembly, a bearing plate, an extrusion plate and a driving assembly; the water filter assembly is arranged between the bearing plate and the extrusion plate; the bearing plate is used for bearing the water filter assembly, and the extrusion plate is used for extruding the water filter assembly; the driving assembly is connected with the extrusion plate, and the driving assembly can drive the extrusion plate to move in the direction towards the water filter assembly to extrude the water filter assembly.

[0008] Further, the water filter assembly comprises a plurality of water filter material pieces arranged along the gas flow direction; the thickness of the water filter material piece upstream of the gas flow direction is greater than the thickness of the water filter material piece downstream of the gas flow direction; and / or the porosity of the water filter material piece upstream of the gas flow direction is less than the porosity of the water filter material piece downstream of the gas flow direction.

[0009] Further, a connecting plate and a clamping column are further included; the connecting plate is arranged opposite to the bearing plate, and the water filter assembly and the extrusion plate are arranged between the connecting plate and the bearing plate; a plurality of clamping columns are arranged on the outer periphery of the connecting plate and the bearing plate and are clamped and fixed with the connecting plate and the bearing plate.

[0010] Further, the connecting plate, the bearing plate and the extrusion plate are all condensing plates, and air holes are arranged on each of the condensing plates to facilitate other flow and condensation.

[0011] Further, the driving assembly comprises a gas cylinder and a push rod; one end of the push rod is connected with the piston rod of the gas cylinder, and the other end of the push rod is connected with the extrusion plate through the connecting plate.

[0012] Further, a plurality of clamping grooves are arranged on each clamping column along the length direction of the clamping column; the connecting plate and the bearing plate are respectively clamped and connected with the corresponding clamping grooves, and the spacing between the connecting plate and the bearing plate is adapted to the thickness of the water filter assembly.

[0013] In a second aspect, the utility model also provides a filter device, including filter bottle and above-mentioned filter structure;The filter structure includes driving assembly and water filter assembly, bearing plate and extrusion plate arranged in the filter bottle.

[0014] Further, a connecting ring is further included, and the filter structure further comprises a connecting plate arranged in the filter bottle;A first gas flow channel for gas outflow is arranged on the filter bottle, one end of the connecting ring is connected with the filter bottle, and the other end of the connecting ring is connected with the connecting plate;A second gas flow channel is arranged in the connecting ring and is communicated with the first gas flow channel.

[0015] Further, the driving assembly comprises a gas cylinder and a push rod; the gas cylinder is arranged outside the filter bottle, one end of the push rod is connected with the piston rod of the gas cylinder, and the other end of the push rod is sequentially connected with the extrusion plate through the filter bottle, the second gas flow channel of the connecting ring and the connecting plate.

[0016] Further, a corrugated tube, a first vacuum sealing assembly and a second vacuum sealing assembly are further included; the corrugated tube is sleeved on the part of the push rod located outside the filter bottle, one end of the corrugated tube is fixedly connected with the filter bottle in a sealed manner through the first vacuum sealing assembly, and the other end of the corrugated tube is fixedly connected with the push rod in a sealed manner through the second vacuum sealing assembly.

[0017] In the case of adopting the technical scheme, the utility model has the advantages of:

[0018] (1) The filter structure includes a water filter assembly, the water filter assembly has a plurality of water filter material sheets stacked and arranged, and is used for absorbing water in the gas; the filter structure further includes a connecting plate, a bearing plate used for bearing the water filter assembly, and a pressing plate used for pressing the water filter assembly, the connecting plate, the bearing plate and the pressing plate are all condensing plates provided with air holes, and are used for the circulation and condensation of the gas; thus, the filter structure can condense and absorb water in the gas, can meet the use in a humid environment, can be repeatedly used, and the service life of the filter structure is greatly improved.

[0019] (2) The water filter material sheet is made of a water-absorbing material with certain compressibility and capable of rebounding and recovering, so as to discharge the absorbed water by pressing, for example, sponge or polyurethane material can be used; the driving assembly can drive the pressing plate to press the water filter assembly, and can also drive the pressing plate to move in a direction away from the water filter assembly, at this time, the material property of the water filter assembly can realize automatic rebounding and recovery to the original state; and according to the flow direction of the airflow, the water filter material sheet through which the airflow flows first has a thicker thickness and fewer cavities, and the water filter material through which the airflow flows later has a thinner thickness and more cavities, so as to realize multi-stage water-absorbing filtration of the gas and improve the absorption effect; wherein, the airflow flows in the direction from the bearing plate to the connecting plate.

[0020] (3) The connecting plate and the bearing plate are connected through a plurality of clamping columns arranged on the outer periphery, the plurality of clamping columns, the connecting plate and the bearing plate enclose a space region used for placing the water filter assembly; and each clamping column is provided with a plurality of clamping grooves at intervals along the length direction thereof, for example, when the clamping column is arranged in the vertical direction, a plurality of clamping grooves at different heights are arranged on each clamping column, the connecting plate and the bearing plate are respectively adapted to be clamped with the clamping grooves at the same height on the plurality of clamping columns; and the clamping height of the bearing plate or the connecting plate can be specifically adjusted, so as to adjust the spacing between the connecting plate and the bearing plate, and make the spacing compatible with the total thickness dimension of the water filter assembly.

[0021] (4) The utility model discloses a drive assembly includes cylinder and push rod, wherein, cylinder sets up at the outside of filter bottle, and cylinder is connected with extruding plate through push rod, in order to improve the air tightness of filter device, the part of push rod is set up vacuum bellows at the outside of filter bottle, the bellows has certain axial telescopic amount, and the both ends of bellows are fixedly connected through vacuum sealing assembly with push rod and filter bottle respectively to realize vacuum sealing to avoid the gas leakage in filter bottle, wherein, vacuum sealing assembly is the combination of vacuum clamp and sealing ring center support.

[0022] (5) The utility model discloses a filter structure is connected with filter bottle through connecting ring, specifically, the inside of this connecting ring is provided with the second airflow channel of through -going, is provided with the first airflow channel on filter bottle, and the outer wall of one end of connecting ring and the inner wall of first airflow channel are installed with sealing ring and are pressed tightly between, realize the connection of both through the pressing action and friction force of sealing ring, make the airflow discharge from the air outlet in turn after second airflow channel, first airflow channel. BRIEF DESCRIPTION OF DRAWINGS

[0023] The preferred embodiments of the utility model are described below in conjunction with the drawings, wherein:

[0024] Fig. 1 It is the overall structure schematic diagram of the filter device of the utility model,

[0025] Fig. 2 It is the internal structure schematic diagram of the filter device of the utility model,

[0026] Fig. 3 It is the sectional view of the filter device of the utility model.

[0027] Reference signs:

[0028] 1-water filter assembly, 2-bearing plate, 3-extruding plate, 4-connecting plate, 5-column, 6-cylinder, 7-push rod, 8-filter bottle, 9-connecting ring, 10-first airflow channel, 11-second airflow channel, 12-bellows, 13-first vacuum sealing assembly, 14-second vacuum sealing assembly, 15-bottle cap, 16-bottle body, 17-sealing ring, 18-air inlet, 19-air outlet, 20-gas introduction pipe. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail in conjunction with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0030] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation. For ordinary skilled in the art, the above-mentioned term can be understood in the utility model the concrete meaning of the specific situation.

[0031] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features is not direct contact but is through the contact between other features of them. Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0032] In the description of the embodiment, the orientation or position relationship of the terms "on", "under", "left", "right" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it can not be understood as a limitation to the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0033] Embodiment 1

[0034] As Figs. 1 to 3 shown, the utility model discloses a filter structure, this filter structure includes water filter subassembly 1, bearing plate 2, extrusion plate 3 and drive assembly, wherein water filter subassembly 1 is located between bearing plate 2 and extrusion plate 3 and is used to absorb the moisture in gas, bearing plate 2 is used to support water filter subassembly 1, extrusion plate 3 is used to extrude water filter subassembly 1, drive assembly is connected with extrusion plate 3 and drives extrusion plate 3 to move along the direction towards water filter subassembly 1 to extrude water filter subassembly 1 and discharge the moisture absorbed.

[0035] As Fig. 3As shown, the filter structure further comprises a connecting plate 4 and a clamping column 5, the connecting plate 4 is used for being connected with the bottle cap 15 of the filter bottle 8, the connecting plate 4 is oppositely arranged with the bearing plate 2, a plurality of clamping columns 5 are arranged at the outer periphery of the connecting plate 4 and the bearing plate 2 and jointly enclose a certain space region, the water filter assembly 1 and the extrusion plate 3 are arranged in the space region formed by the enclosure; the gas flows through the bearing plate 2, the water filter assembly 1, the extrusion plate 3 and the connecting plate 4 in sequence for dehumidification and filtration. It should be pointed out that in this paper, unless there is a clear opposite expression, the technical term "opposite arrangement" means that the components are opposite to each other in space, including parallel to each other or forming a certain inclination angle.

[0036] Exemplarily, the filter structure comprises the bearing plate 2, the water filter assembly 1, the extrusion plate 3 and the connecting plate 4 arranged in sequence from bottom to top, a plurality of clamping columns 5 are vertically arranged at the outer periphery of the connecting plate 4 and the bearing plate 2, the driving assembly is arranged at the upper position of the connecting plate 4 and is connected with the extrusion plate 3 after penetrating through the connecting plate 4, when the driving assembly drives the extrusion plate 3 to extrude the water filter assembly 1 downward, the absorbed water can be discharged, when the driving assembly drives the extrusion plate 3 to move upward, the material characteristics of the water filter assembly 1 can automatically rebound and restore to the original state. It should be pointed out that the embodiment takes the filter structure arranged in the vertical direction as an example for description, and the setting direction of the filter structure can be specifically set by the person skilled in the art, and the utility model is not limited.

[0037] As a preferred embodiment of the utility model, the driving assembly comprises a gas cylinder 6 and a push rod 7, the moving end of the gas cylinder 6 is a piston rod, one end of the push rod 7 is connected with the piston rod, and the other end is connected with the extrusion plate 3 after penetrating through the connecting plate 4; so that the gas cylinder 6 drives the push rod 7 and the extrusion plate 3 to move as a whole in the direction towards the water filter assembly 1 or away from the water filter assembly 1.

[0038] Exemplarily, the gas cylinder 6 is arranged above the connecting plate 4, a through hole is formed in the middle of the connecting plate 4, the push rod 7 is vertically arranged and connected with the extrusion plate 3 after penetrating through the through hole on the connecting plate 4; a threaded hole is formed in the top of the push rod 7 and the piston rod of the gas cylinder 6 is fixedly connected through the threaded hole, a groove is formed in the middle of the extrusion plate 3, and the bottom of the push rod 7 is fixedly connected with the groove of the extrusion plate 3 through the threaded hole. It should be pointed out that the person skilled in the art can also adopt other connection modes to realize the connection and fixation of the push rod 7 with the piston rod and the extrusion plate 3, and the utility model is not limited.

[0039] As a preferred embodiment of the utility model, the water filter assembly 1 is made of water-absorbing porous material, for example, can be made of sponge or polyurethane material; the water filter assembly 1 comprises a plurality of water filter material sheets arranged in layers along the gas flow direction; preferably, in the water filter material sheet, a plurality of water-absorbing holes are arranged in the form of a plurality of rows and columns. Fig. 3In the embodiment, the thickness of the water filter material sheet located upstream of the gas flow direction, i.e. below, is thicker and has fewer cavities, while the thickness of the water filter material sheet located downstream of the gas flow direction, i.e. above, is thinner and has more cavities; by arranging the multiple layers of water filter material sheets, multi-stage filtering and water absorption are realized, and the dehumidification effect is improved. It should be noted that the material of the water filter material sheet can be specifically selected, and the thickness size and porosity of the water filter material sheet can be specifically set, and the utility model is not specifically set.

[0040] As a preferred embodiment of the utility model, each clamping column 5 is provided with multiple clamping grooves along the length direction thereof, the connecting plate 4 and the bearing plate 2 are selectively adapted to one of the multiple clamping grooves for clamping, and the spacing between the connecting plate 4 and the bearing plate 2 is adapted to the total thickness of the water filter assembly.

[0041] Exemplarily, as shown in Fig. 3 The number of clamping columns 5 is four, the four clamping columns 5 are vertically arranged at the outer periphery of the connecting plate 4 and the bearing plate 2, and the clamping columns 5 are provided with multiple clamping grooves of different heights, wherein the connecting plate 4 is adapted to the uppermost clamping groove of the clamping column 5 for clamping, and the bearing plate 2 is selectively adapted to the clamping grooves of the clamping column 5 of the remaining setting height for clamping, and when installed, the installation height of the bearing plate 2 can be specifically adjusted to adjust the spacing between the bearing plate 2 and the connecting plate 4, so that the spacing is matched with the total height of the water filter assembly 1. It should be noted that the number of clamping columns 5 can be specifically set, and the clamping connection structure between the clamping column 5 and the bearing plate 2 and the connecting plate 4 can be specifically set, and the utility model is not specifically limited.

[0042] As a preferred embodiment of the utility model, the bearing plate 2, the extrusion plate 3 and the connecting plate 4 are all condensing plates, and multiple air holes are arranged on the condensing plates for air passing and condensing, so as to improve the dehumidification effect by condensing the water vapor in the gas; the shape and arrangement of the air holes on the condensing plate can be specifically set by those skilled in the art, and the utility model is not specifically limited.

[0043] Embodiment 2

[0044] The utility model discloses an embodiment further discloses a filtering device, the filtering device includes above-mentioned filtering structure and filter bottle 8, filter bottle 8 includes bottle cap 15 and bottle body 16, the inside of bottle body 16 is equipped with a certain amount of water for filtering B2O3 and chlorine gas in tail gas.

[0045] The filtering bottle 8 further comprises a gas introduction pipe 20, one end of which is the gas inlet 18, and the other end of which penetrates the bottle cap 15 and extends into the water in the bottle body 16 to filter the introduced tail gas; the bottom of the bottle body 16 is provided with a water outlet and a corresponding valve, and the filtered water in the bottle body 16 can be emptied by introducing compressed dry air CDA through the gas inlet 18 when needed; the bottle cap 15 is provided with a first gas flow channel 10 for the outflow of gas, and the end of the first gas flow channel 10 is the gas outlet 19.

[0046] The filtering device further comprises a connecting ring 9 connected with the bottle cap 15, the inside of the connecting ring 9 is provided with a second gas flow channel 11 in communication with the first gas flow channel 10; the filtering structure comprises a bearing plate 2, a water filter assembly 1, an extrusion plate 3 and a connecting plate 4 arranged in the filtering bottle 8; one end of the connecting ring 9 is sealingly connected with the first gas flow channel 10 on the bottle cap 15, and the other end is connected and fixed with the connecting plate 4.

[0047] When the filtering device filters the tail gas of boron expansion, the tail gas enters from the gas inlet 18, enters the water in the filtering bottle 8 along the gas introduction pipe 20, is filtered, overflows from the bottom of the gas introduction pipe 20, and then is filtered and dehumidified in turn through the bearing plate 2, the water filter assembly 1, the extrusion plate 3 and the condensing plate 4, and then flows out from the gas outlet 19 along the second gas flow channel 10 and the first gas flow channel 11 to the vacuum pump.

[0048] As shown in Fig. 3 , two sealing rings 7 are installed between the top outer wall of the connecting ring 9 and the inner wall of the first gas flow channel 10 for compression, and the connection between the connecting ring 9 and the bottle cap 15 is realized through the compression and friction of the sealing rings 7; the bottom of the connecting ring 9 is connected and fixed with the connecting plate 4 through fasteners such as bolts.

[0049] As shown in Fig. 3 , the filtering structure further comprises a driving assembly, and the driving assembly comprises a gas cylinder 6 and a push rod 7; wherein the gas cylinder 6 is arranged outside the filtering bottle 8, one end of the push rod 7 is connected with the piston rod of the gas cylinder 6, and the other end penetrates the first channel 11 of the bottle cap 15, the connecting ring 9 and the through hole of the connecting plate 4 and is connected with the extrusion plate 3, so that the gas cylinder 6 can drive the push rod 7 and the extrusion plate 3 to move integrally.

[0050] As shown in , the gas cylinder 6 is arranged above the filtering bottle 8, the lower end of the push rod 7 penetrates the bottle cap 15, the first channel 11 and the connecting plate 4 downwardly and is connected with the extrusion plate 3, the gas cylinder 6 can drive the extrusion plate 3 to move downwardly to extrude the water filter assembly 1, and can also drive the extrusion plate 3 to move upwardly, so that the water filter assembly 1 automatically restores to the original state.

[0051] The filter device can realize the automation of adsorbing and discharging water vapor.

[0052] As a preferred embodiment of the utility model, the filter device further comprises a bellows 12, a first vacuum sealing assembly 13 and a second vacuum sealing assembly 14; wherein the bellows 12 is a vacuum bellows, which has a certain axial extension amount, and the bellows 12 is sleeved on the part of the push rod 7 above the bottle cap 15; the first vacuum sealing assembly 13 and the second vacuum sealing assembly 14 are both combinations of vacuum clamps and sealing ring center supports; the top end of the bottle cap 15 is welded with a vacuum flange, the lower end of the bellows 12 is fixedly connected with the vacuum flange on the bottle cap 15 through the first vacuum sealing assembly 13, and the upper end of the bellows 12 is fixedly connected with the outer wall of the push rod 7 through the second vacuum sealing assembly 14.

[0053] The cylinder 6, the bottle cap 15 and the bottle body 16 of the utility model are all fixedly connected with the rack; the two ends of the bellows 12 are respectively sealingly connected with the bottle cap 15 and the push rod 7, which can guarantee the air tightness of the filter bottle 8 and avoid the leakage of the gas in the filter bottle 8; meanwhile, the bellows 12 has a certain axial extension amount, and in the process of the push rod 7 moving up and down driven by the cylinder 6, the bellows 12 can extend and contract accordingly, so that the filter device of the utility model can realize the automatic extrusion drainage function, avoid manual operation and reduce the artificial maintenance cost.

[0054] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but the person skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, the person skilled in the art can make equivalent changes or replacements on the related technical features, and the technical schemes after the changes or replacements will all fall into the protection scope of the utility model.

Claims

1. A filter structure, characterized by, The filter structure comprises a water filter assembly (1), a bearing plate (2), an extrusion plate (3) and a driving assembly; The water filter assembly (1) is arranged between the bearing plate (2) and the extrusion plate (3); The bearing plate (2) is used for bearing the water filter assembly (1), and the extrusion plate (3) is used for extruding the water filter assembly (1); The driving assembly is connected with the extrusion plate (3), and the driving assembly can drive the extrusion plate (3) to move towards the water filter assembly (1) to extrude the water filter assembly (1).

2. The filter structure of claim 1, wherein, The water filter assembly (1) comprises a plurality of water filter material sheets arranged along a gas flow direction; The thickness of the water filter material sheet located upstream in the gas flow direction is greater than the thickness of the water filter material sheet located downstream in the gas flow direction; and / or The porosity of the water filter material sheet located upstream in the gas flow direction is less than the porosity of the water filter material sheet located downstream in the gas flow direction.

3. The filter structure of claim 1, wherein, Further comprising a connecting plate (4) and a clamping column (5); The connecting plate (4) is arranged opposite to the bearing plate (2), and the water filter assembly (1) and the extrusion plate (3) are arranged between the connecting plate (4) and the bearing plate (2); A plurality of clamping columns (5) are arranged on the outer periphery of the connecting plate (4) and the bearing plate (2) and are clamped and fixed with the connecting plate (4) and the bearing plate (2).

4. The filter structure of claim 3, wherein, The connecting plate (4), the bearing plate (2) and the extruding plate (3) are all condensing plates, and air holes are arranged on each of the condensing plates ， In order to facilitate the circulation and condensation of the gas.

5. The filter structure of claim 3, wherein, The driving assembly comprises a gas cylinder (6) and a push rod (7); One end of the push rod (7) is connected with a piston rod of the gas cylinder (6), and the other end of the push rod (7) penetrates through the connecting plate (4) and is connected with the extrusion plate (3).

6. The filter structure of claim 3, wherein, Each clamping column (5) is spaced apart with a plurality of clamping grooves along the length direction of the clamping column (5); The connecting plate (4) and the bearing plate (2) are respectively clamped and fitted with the corresponding clamping grooves, and the spacing between the connecting plate (4) and the bearing plate (2) is adapted to the thickness of the water filter assembly (1).

7. A filter device, characterized in that The filter structure comprises a filter bottle (8) and the filter structure according to any one of claims 1-6; The filter structure comprises a driving assembly, a water filter assembly (1), a bearing plate (2) and an extrusion plate (3) arranged in the filter bottle (8).

8. A filter device according to claim 7, characterised in that Further comprising a connecting ring (9), and the filter structure further comprises a connecting plate (4) arranged in the filter bottle (8); The filter bottle (8) is provided with a first gas flow channel (10) for gas outflow, one end of the connecting ring (9) is connected with the filter bottle (8), and the other end of the connecting ring (9) is connected with the connecting plate (4); the inside of the connecting ring (9) is provided with a second gas flow channel (11) in communication with the first gas flow channel (10).

9. The filter device of claim 8, wherein, The driving assembly comprises a gas cylinder (6) and a push rod (7); The gas cylinder (6) is arranged outside the filter bottle (8), one end of the push rod (7) is connected with a piston rod of the gas cylinder (6), and the other end of the push rod (7) penetrates through the filter bottle (8), the second gas flow channel (11) of the connecting ring (9), the connecting plate (4) and is connected with the extrusion plate (3) in sequence.

10. The filter device of claim 9, wherein, Further comprising a bellows (12), a first vacuum sealing assembly (13) and a second vacuum sealing assembly (14); The bellows (12) is sleeved on the part of the push rod (7) outside the filter bottle (8), one end of the bellows (12) is sealingly and fixedly connected with the filter bottle (8) through the first vacuum sealing assembly (13), and the other end of the bellows is sealingly and fixedly connected with the push rod (7) through the second vacuum sealing assembly (14).

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