CN213232150U - Natural gas filtering device - Google Patents

Abstract

A natural gas filtering device comprises a shell, a supporting plate, a fixing plate and a filter element, wherein the supporting plate is arranged in the shell, is fixedly connected to the inner wall of the shell in an inner mode, is positioned above an air inlet and is provided with a plurality of mounting holes for mounting the filter element; the fixing plate is circular, is slidably sleeved in the shell, is positioned above the air outlet and is provided with a plurality of connecting holes for fixing the filter element; the supporting plate is connected with the fixing plate through a fixing rod, the fixing rod is perpendicular to the supporting plate, one end of the fixing rod is fixed on the supporting plate, and the other end of the fixing rod extends to the top of the shell and is detachably connected with the fixing plate; the filter element comprises a filter element main body, an air inlet pipe and a fixed block, wherein the air inlet pipe is arranged on the bottom surface of the filter element main body, the fixed block is arranged on the top surface of the filter element main body, and a filter layer is arranged in the filter element main body; the outer side surface of the air inlet pipe is provided with a first sealing ring, and the joint of the air inlet pipe and the bottom surface of the filter element main body is provided with a second sealing ring. The utility model discloses can prevent that the natural gas from wearing to strain, the impact resistance of reinforcing filter core, simple structure facilitates the use.

Description

Natural gas filtering device

Technical Field

The utility model relates to a natural gas processing technology field, more specifically relates to a natural gas filter equipment.

Background

At present, the method for producing acetylene is generally through the natural gas pyrolysis method, in the acetylene device is made in the natural gas pyrolysis, because mechanical impurities are more in the natural gas, need filter the natural gas, when filtering, because the flow of natural gas is great, every filtration equipment filtration capacity is great, current filter is not good at the filter effect among the in-service use, natural gas filter and filter core sealing performance are relatively poor, cause a large amount of mechanical impurities to wear to strain, the big large-traffic technological index of big pressure drop can not be satisfied to the sealed form of filter core, and, mechanical impurities content is big in the natural gas, the air current impact force is strong, lead to the filter core to damage easily, need often to change the filter core. If the impurities in the filtered natural gas are more, the natural gas can catch fire frequently in the natural gas cracking furnace, the natural gas catches fire and threatens the safety of life and property, the stable operation of the device and the service life of equipment are seriously influenced, the influence is caused on the normal production of a downstream workshop, a large amount of natural gas is wasted, and the serious economic loss is caused to a factory.

Therefore, a natural gas filtering device with strong impact resistance and good sealing performance, which does not need frequent replacement of the filter element, is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a natural gas filtering device, which comprises a shell 1, a supporting plate 2, a fixing plate 3 and a filter element 4, wherein the shell 1 is of a cylindrical structure, two ends of the shell are open, and the shell 1 is provided with a bottom cover 11 and a top cover 12; an air inlet 13 is arranged at one end of the side surface of the shell 1 close to the bottom cover 11, and an air outlet 14 is arranged at one end close to the top cover 12; a support plate 2 is arranged in the shell 1, the support plate 2 is circular, is fixedly connected with the inner wall of the shell 1 in an inner way, is positioned above the air inlet 13, and is provided with a plurality of mounting holes 21 for mounting the filter element 4; the fixing plate 3 is circular, is slidably sleeved in the shell 1, is positioned above the air outlet 14, and is provided with a plurality of connecting holes 31 for fixing the filter element 4; the supporting plate 2 is connected with the fixing plate 3 through a fixing rod 22, the fixing rod 22 is perpendicular to the supporting plate 2, one end of the fixing rod is fixed on the supporting plate 2, and the other end of the fixing rod extends to the top of the shell 1 and is detachably connected with the fixing plate 3; the filter element 4 comprises a filter element main body 41, an air inlet pipe 42 and a fixing block 47, wherein the filter element main body 41 is of a cylindrical structure, the air inlet pipe 42 sleeved in the mounting hole 21 on the support plate 2 is arranged on the bottom surface of the filter element main body 41, the fixing block 47 sleeved in the connecting hole 31 on the fixing plate 3 is arranged on the top surface of the filter element main body 41, and a filter layer 48 is arranged inside the filter element main body 41; be provided with first sealing ring 43 on the intake pipe 42 lateral surface, the junction of intake pipe 42 and filter core main part 41 bottom surface is provided with second sealing ring 44, second sealing ring 44 includes sealing ring main part 441 and sealing ring base 442, sealing ring main part 441 perpendicular to sealing ring base 442 and with sealing ring base 442 integrated into one piece, sealing ring base 442 and the laminating of filter core main part 41 bottom surface, sealing ring main part 441 and the laminating of intake pipe 42 lateral surface.

According to an embodiment of the present invention, a first annular groove 45 is disposed on an outer side surface of the air inlet pipe 42, and a first sealing ring 43 is disposed on the first annular groove 45; a second annular groove 46 is arranged at the joint of the air inlet pipe 42 and the bottom surface of the filter element main body 41, the second annular groove 46 comprises a radial annular groove 461 extending along the radial direction of the bottom surface of the filter element main body 41 and an axial annular groove 462 extending along the axial line of the air inlet pipe 42, and a second sealing ring 44 is arranged on the second annular groove 46; the first annular grooves 45 are provided in three numbers.

According to the utility model discloses an embodiment, intake pipe 42 length is 5cm, the thickness of backup pad 2 is 5 cm.

According to an embodiment of the present invention, the filter layer 48 in the filter element main body 41 is a polyester fiber layer 481, a glass fiber filter layer 482, a water-resisting fiber filter layer 483 and a skeleton layer 484 in this order from the outside to the inside.

According to the utility model discloses an embodiment still includes filter 5, filter 5 is the obconic shape, can dismantle fixed the interpolation on 1 inner wall of casing, is located between air inlet 13 and the backup pad 2, be provided with a plurality of filtration pores on filter 5.

According to the utility model discloses an embodiment, bottom 11 is the obconic shape, and bottom 11 point portion is provided with drain 15, is provided with blowoff valve 16 on the drain 15.

According to an embodiment of the present invention, the top of the fixing block 47 is conical.

According to an embodiment of the present invention, the housing 1 and the top cover 12, the housing 1 and the bottom cover 11 are connected by bolts.

According to the utility model discloses an embodiment, dead lever 22 top is provided with the screw thread, be provided with the fixed orifices 32 that matches with dead lever 22 on the fixed plate 3, the fixed orifices 32 that fixed plate 3 was passed at dead lever 22 top passes through bolt fixed connection.

The utility model is provided with a supporting plate and a fixing plate, the filter element is clamped and fixed between the supporting plate and a fixed top plate through a fixing rod, the stability of the filter element can be enhanced, the impact resistance of the filter element can be enhanced, a large number of filter elements can be fixed simultaneously, the filtering capacity of the device is improved, the sealing performance of the device can be enhanced by arranging a first sealing ring and a second sealing ring on the air inlet pipe of the filter element, natural gas penetration is prevented, the diameter of the air inlet pipe of the filter element is 5cm, the impact resistance of the filter element can be enhanced, a filter hopper is arranged, air flow is blocked and dispersed through the filter hopper, the damage of the filter element or natural gas penetration caused by local air flow is prevented, the natural gas is preliminarily filtered through the filter hopper, the blockage of the filter element can be reduced, the filter element is protected, the bottom cover is provided with an inverted cone shape, impurities falling from the, the shell and the top cover, the shell and the bottom cover are fixed through bolts, disassembly and assembly are facilitated, and the device is simple in structure, easy to operate, convenient to install and use.

Drawings

FIG. 1 is a schematic diagram of the general construction of a natural gas filtration unit;

FIG. 2 is a schematic cross-sectional view of a filter cartridge;

fig. 3 is a schematic diagram of the general structure of the natural gas filtering device with a filter hopper.

In the figure, 1, a shell, 11, a bottom cover, 12, a top cover, 13, an air inlet, 14, an air outlet, 15, a sewage draining outlet, 16, a sewage draining valve, 2, a support plate, 21, a mounting hole, 22, a fixing rod, 3, a fixing plate, 31, a connecting hole, 32, a fixing hole, 4, a filter element, 41, a filter element main body, 42, an air inlet pipe, 43, a first sealing ring, 44, a second sealing ring, 441, a sealing ring main body, 442, a sealing ring base, 45, a first annular groove, 46, a second annular groove, 461, a radial annular groove, 462, an axial annular groove, 47, a fixing block, 48, a filtering layer, 481, a polyester fiber layer, 482, a glass fiber filtering layer, 483, a water-resisting fiber filtering layer, 484, a framework layer and 5, wherein.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like elements and techniques of the present invention so that advantages and features of the present invention may be more readily understood when implemented in a suitable environment. The following description is an embodiment of the present invention, and other embodiments related to the claims that are not explicitly described also fall within the scope of the claims.

Fig. 1 shows a schematic diagram of the general structure of a natural gas filtering device.

Fig. 2 shows a schematic cross-sectional view of a filter cartridge.

As shown in fig. 1 and 2, the natural gas filtering device comprises a shell 1, a support plate 2, a fixing plate 3 and a filter element 4, wherein the shell 1 is of a cylindrical structure, two ends of the shell are open, and a bottom cover 11 and a top cover 12 are arranged on the shell 1; an air inlet 13 is arranged at one end of the side surface of the shell 1 close to the bottom cover 11, and an air outlet 14 is arranged at one end close to the top cover 12; a support plate 2 is arranged in the shell 1, the support plate 2 is circular, is fixedly connected with the inner wall of the shell 1 in an inner way, is positioned above the air inlet 13, and is provided with a plurality of mounting holes 21 for mounting the filter element 4; the fixing plate 3 is circular, is slidably sleeved in the shell 1, is positioned above the air outlet 14, and is provided with a plurality of connecting holes 31 for fixing the filter element 4; the supporting plate 2 is connected with the fixing plate 3 through a fixing rod 22, the fixing rod 22 is perpendicular to the supporting plate 2, one end of the fixing rod is fixed on the supporting plate 2, and the other end of the fixing rod extends to the top of the shell 1 and is detachably connected with the fixing plate 3; the filter element 4 comprises a filter element main body 41, an air inlet pipe 42 and a fixing block 47, wherein the filter element main body 41 is of a cylindrical structure, the air inlet pipe 42 sleeved in the mounting hole 21 on the support plate 2 is arranged on the bottom surface of the filter element main body 41, the fixing block 47 sleeved in the connecting hole 31 on the fixing plate 3 is arranged on the top surface of the filter element main body 41, and a filter layer 48 is arranged inside the filter element main body 41; be provided with first sealing ring 43 on the intake pipe 42 lateral surface, the junction of intake pipe 42 and filter core main part 41 bottom surface is provided with second sealing ring 44, second sealing ring 44 includes sealing ring main part 441 and sealing ring base 442, sealing ring main part 441 perpendicular to sealing ring base 442 and with sealing ring base 442 integrated into one piece, sealing ring base 442 laminates with filter core main part 41 bottom surface mutually, sealing ring main part 441 laminates with the intake pipe 42 lateral surface mutually. The length of the air inlet pipe 42 is 5cm, and the thickness of the support plate 2 is 5 cm.

Casing 1 can be cylindrical, square isotructure, the utility model discloses preferred adoption cylindric structure, inside is provided with cylindrical cavity, can make air current evenly distributed, even filtration, and occupation space is little moreover.

The diameter of the support plate 2 is the same as the inner diameter of the shell 1, the support plate 2 is horizontally fixed in the shell 1, the side edges of the support plate 2 are abutted and fixed on the inner wall of the shell 1, and the support plate can be fixed by adopting modes such as welding and the like.

The upper bottom surface of the supporting plate 2 is symmetrically provided with a plurality of fixing rods 22 along the center of the bottom surface, the fixing rods 22 are used for fixedly connecting the supporting plate 2 and the fixing plate 3, the filter element 4 is clamped through the supporting plate 2 and the fixing plate 3, the filter element 4 is fixed, the filter element 4 is prevented from being deformed or inclined by impact of air flow, and the air flow is prevented from passing through the mounting hole 21 in the supporting plate 2.

The length of intake pipe 42 is the same with the thickness of backup pad 2, can confirm according to the impact force of air current, for example can set up 3cm, 5cm or other models, and this novel preferred length that sets up intake pipe 42 is 5cm, can resist the impact force of air current in the axial, prevents that intake pipe 42 from being strikeed the deformation by the air current, leads to the air current to pass from the clearance between the mounting hole 21 of backup pad and the air inlet pipe 42 of filter core 4.

The first sealing ring 43 can seal the gap between the air inlet pipe 42 and the mounting hole 21, the second sealing ring 44 can seal the gap between the air inlet pipe 42 and the mounting hole 21 and the gap between the bottom surface of the support plate 2 and the bottom surface of the filter element main body 41, and the sealing design can greatly reduce the phenomenon that natural gas penetrates through the gap between the mounting hole 21 of the support plate 2 and the air inlet pipe 42 after the filter element 4 is installed on the support plate 2 and is compressed, so that the filtering efficiency is improved.

The fixing rods 22 may be symmetrically disposed around the center of the bottom surface of the supporting plate 2, or may be uniformly disposed along a circumference of the supporting plate 2 around the center of the bottom surface. The fixing rods 22 can be designed in any number, for example, 10, 12 or more can be provided, as long as the fixing plate 3 is stable and the fixing plate 3 can clamp and fix the filter cartridge 4.

The air flow penetration means a phenomenon that natural gas penetrates through a gap between the installation hole 21 and the air inlet pipe 42 or the broken filter element 4 due to a high impact force.

The top of the fixing rod 22 is provided with threads, the fixing plate 3 is provided with a fixing hole 32 matched with the fixing rod 22, and the top of the fixing rod 22 penetrates through the fixing hole 32 on the fixing plate 3 and is fixed through a bolt.

Dead lever and fixed plate can be dismantled to connect and can connect through modes such as bolted connection, threaded connection, riveting, this is novel through setting up the screw thread at the top of dead lever, sets up assorted nut with dead lever and fixed plate fixed connection on the screw thread.

The fixed plate 3 is circular, and the sliding sleeve is arranged in the shell 1, namely the diameter of the fixed plate is the same as that of the cavity in the shell, and the fixed plate can slide along the inner wall of the cavity in the shell.

The bottom surface of the filter element main body 41 is provided with an air inlet pipe 42 which is sleeved in the mounting hole 21 on the support plate 2, the sleeving means that the diameter of the air inlet pipe is the same as the inner diameter of the mounting hole, and the outer wall of the air inlet pipe is attached to the inner wall of the mounting hole.

The number of the connecting holes 31 on the fixing plate 3 is the same as the number of the mounting holes 21 on the support plate 2, and the positions of the connecting holes 31 on the fixing plate 3 correspond to the positions of the mounting holes 21 on the support plate 2, the number of the fixing holes 32 on the fixing plate 3 is the same as the number of the fixing rods 22, and the positions of the fixing rods 22 correspond to the positions of the fixing.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

During the use, cup joint intake pipe 42 on the bottom surface of filter core main part 41 downthehole at air inlet 13 on backup pad 2, make filter core 4 keep vertical stable state, be covered with mounting hole 21 on backup pad 2 with filter core 4, then cup joint respectively on the fixed block 47 of a plurality of filter core main part 41 top surfaces a plurality of connecting holes 31 on the fixed plate 3, cup joint respectively on a plurality of dead levers 22 a plurality of fixed holes 32 on the fixed plate 3, then install the nut on every dead lever 22, and screw up, make fixed plate 3 butt compress tightly filter core 4 on the top surface of filter core main part 41, make filter core 4 press from both sides tightly to fix between backup pad 2 and fixed plate 3, then install filter equipment's top cap 12 and bottom 11 can.

The utility model discloses set up backup pad and fixed plate, press from both sides the filter core through the dead lever and press from both sides tightly to fix between backup pad and solid roof, can strengthen filter core stability, strengthen filter core impact resistance, can fix more quantity's filter core simultaneously, improve the device filter capacity, set up first sealing ring and second sealing ring and can strengthen the device leakproofness in the intake pipe of filter core, prevent that the natural gas from straining, the length that sets up the filter core intake pipe is 5cm, can strengthen the impact resistance of filter core, the utility model discloses simple structure, installation, convenient to use.

As shown in fig. 2, a first annular groove 45 is formed on the outer side surface of the air inlet pipe 42, and a first sealing ring 43 is arranged on the first annular groove 45; a second annular groove 46 is arranged at the joint of the air inlet pipe 42 and the bottom surface of the filter element main body 41, the second annular groove 46 comprises a radial annular groove 461 extending along the radial direction of the bottom surface of the filter element main body 41 and an axial annular groove 462 extending along the axial line of the air inlet pipe 42, and a second sealing ring 44 is arranged on the second annular groove 46; the first annular grooves 45 are provided in three numbers.

First sealing washer can set up 2, 3 or a plurality ofly, and this novel preferred 3 first sealing rings 43 that set up sets up, sets up the space between 3 first sealing ring 43 seal mounting hole 21 and the intake pipe 42, improves the device leakproofness, resists the air current impact force, effectively prevents gaseous percolation.

Set up the concave groove in the intake pipe to through concave groove fixed seal ring, can improve the impact resistance of sealing ring, set up a first sealing ring and can improve the leakproofness between intake pipe and the mounting hole, simple structure moreover.

As shown in fig. 2, the filter layer 48 in the filter element main body 41 is a polyester fiber layer 481, a glass fiber filter layer 482, a water-blocking fiber filter layer 483, and a skeleton layer 484 in this order from the outside to the inside.

The framework layer is arranged to play a supporting role, so that the impact force of airflow is counteracted, each filter layer is prevented from being damaged, the polyester fiber layer, the glass fiber filter layer and the waterproof fiber filter layer are arranged to filter out impurities in natural gas, and the pure natural gas meeting the composite cracking requirement is achieved.

Fig. 3 shows a schematic cross-section of a natural gas filtration plant with a filter funnel 5.

As shown in fig. 3, the filter device further comprises a filter hopper 5, wherein the filter hopper 5 is in an inverted cone shape, is detachably fixed and is connected to the inner wall of the shell 1 in an inner connection mode and is located between the air inlet 13 and the support plate 2, and a plurality of filter holes are formed in the filter hopper 5.

The filter hopper 5 can be made of stainless steel or alloy and the like, and the filter hopper 5 can resist the impact force of airflow, so that the airflow is dispersed and penetrates through the through holes of the filter hopper 5 to uniformly enter each filter element 4, and the filter elements 4 are prevented from being damaged or penetrated and filtered due to overlarge local airflow; filter 5 can carry out prefilter to the natural gas, filters the great impurity of wherein granule, prevents that impurity from blockking up the filter bag, causes the filter bag to damage, and when accumulational impurity is more on filter 5, can lift filter 5 off and wash.

During the use, fix filter 5 on casing 1 inner wall, then install casing bottom 11 and top cap 12, can filter, when piling up impurity is more on filter 5, can lift off and wash.

Set up the filter funnel, block and disperse the air current through the filter funnel, can prevent that local air current from too big causing the filter core to damage, or natural gas cross-filtration, carry out prefilter to the natural gas through the filter funnel, can reduce the jam of filter core, protection filter core, extension filter core life-span, the device simple structure, installation, convenient to use.

As shown in fig. 3, the bottom cover 11 is in an inverted cone shape, a sewage outlet 15 is arranged at the tip of the bottom cover 11, and a sewage valve 16 is arranged on the sewage outlet 15.

The bottom sets up the inverted cone shape and can collects and store the impurity that drops from filter hopper or filter core, sets up the blowoff valve on the drain and can regularly discharge the impurity in the bottom by ration.

As shown in fig. 3, the top of the fixing block 47 is tapered.

The top of the fixing block is set to be conical, so that a plurality of fixing blocks can be inserted into the through holes of the fixing plate more easily when the fixing plate is placed, and the working efficiency is improved.

As shown in fig. 3, the housing 1 and the top cover 12, and the housing 1 and the bottom cover 11 are connected by bolts.

The shell and the top cover, the shell and the bottom cover are fixed through bolts, so that not only is the structural stability good, but also the disassembly and the assembly are convenient.

As shown in fig. 3, the top of the fixing rod 22 is provided with threads, the fixing plate 3 is provided with fixing holes 32 matched with the fixing rod 22, and the fixing rod 22 and the fixing plate 3 are connected through bolts.

The fixing rod and the fixing plate are fixed in a bolt mode, so that the fixing rod and the fixing plate are convenient to disassemble and assemble, and the structural stability is good.

The utility model is provided with a supporting plate and a fixing plate, the filter element is clamped and fixed between the supporting plate and a fixed top plate through a fixing rod, the stability of the filter element can be enhanced, the impact resistance of the filter element can be enhanced, a large number of filter elements can be fixed simultaneously, the filtering capacity of the device is improved, the sealing performance of the device can be enhanced by arranging a first sealing ring and a second sealing ring on the air inlet pipe of the filter element, natural gas penetration is prevented, the diameter of the air inlet pipe of the filter element is 5cm, the impact resistance of the filter element can be enhanced, a filter hopper is arranged, air flow is blocked and dispersed through the filter hopper, the damage of the filter element caused by overlarge local air flow can be prevented, or natural gas penetration is prevented, the natural gas is primarily filtered through the filter hopper, the blockage of the filter element can be reduced, the filter element is protected, the service life of the filter element is prolonged, the bottom cover is provided, the shell and the top cover, the shell and the bottom cover are fixed through bolts, so that the device is good in structural stability, convenient to disassemble and assemble, simple in structure and convenient to install and use.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Claims (9)

1. A natural gas filtering device is characterized by comprising a shell (1), a supporting plate (2), a fixing plate (3) and a filter element (4),

the shell (1) is of a cylindrical structure, two ends of the shell are open, and a bottom cover (11) and a top cover (12) are arranged on the shell (1);

an air inlet (13) is formed in one end, close to the bottom cover (11), of the side face of the shell (1), and an air outlet (14) is formed in one end, close to the top cover (12);

a support plate (2) is arranged in the shell (1), the support plate (2) is circular, is fixedly connected with the inner wall of the shell (1) in an inner mode and is located above the air inlet (13), and a plurality of mounting holes (21) used for mounting the filter element (4) are formed in the support plate (2);

the fixing plate (3) is circular, is slidably sleeved in the shell (1), is positioned above the air outlet (14), and is provided with a plurality of connecting holes (31) for fixing the filter element (4);

the supporting plate (2) is connected with the fixing plate (3) through a fixing rod (22), the fixing rod (22) is perpendicular to the supporting plate (2), one end of the fixing rod is fixed on the supporting plate (2), and the other end of the fixing rod extends to the top of the shell (1) and is detachably connected with the fixing plate (3);

the filter element (4) comprises a filter element main body (41), an air inlet pipe (42) and a fixing block (47), the filter element main body (41) is of a cylindrical structure, the air inlet pipe (42) which is sleeved in a mounting hole (21) in the support plate (2) is arranged on the bottom surface of the filter element main body (41), the fixing block (47) which is sleeved in a connecting hole (31) in the fixing plate (3) is arranged on the top surface of the filter element main body (41), and a filter layer (48) is arranged in the filter element main body (41);

be provided with first sealing ring (43) on intake pipe (42) lateral surface, the junction of intake pipe (42) and filter core main part (41) bottom surface is provided with second sealing ring (44), second sealing ring (44) are including sealing ring main part (441) and sealing ring base (442), sealing ring main part (441) perpendicular to sealing ring base (442) and with sealing ring base (442) integrated into one piece, sealing ring base (442) and the laminating of filter core main part (41) bottom surface, sealing ring main part (441) and intake pipe (42) lateral surface laminating.

2. The natural gas filtering device according to claim 1, characterized in that a first annular groove (45) is provided on the outer side of the inlet pipe (42), a first sealing ring (43) being provided on the first annular groove (45);

a second annular groove (46) is formed in the joint of the air inlet pipe (42) and the bottom surface of the filter element main body (41), the second annular groove (46) comprises a radial annular groove (461) extending along the radial direction of the bottom surface of the filter element main body (41) and an axial annular groove (462) extending along the axial line of the air inlet pipe (42), and a second sealing ring (44) is arranged on the second annular groove (46);

the number of the first annular grooves (45) is three.

3. The natural gas filtering device according to claim 1, characterized in that the intake pipe (42) has a length of 5cm and the support plate (2) has a thickness of 5 cm.

4. The natural gas filtering device according to claim 1, wherein the filter layer (48) in the filter element main body (41) is a polyester fiber layer (481), a glass fiber filter layer (482), a water-blocking fiber filter layer (483), and a skeleton layer (484) in this order from the outside to the inside.

5. Natural gas filtration unit according to claim 1, further comprising a filter hopper (5),

the filter hopper (5) is in an inverted cone shape, is detachably fixed and internally connected to the inner wall of the shell (1) and is positioned between the air inlet (13) and the support plate (2), and a plurality of filter holes are formed in the filter hopper (5).

6. The natural gas filtering device according to claim 1, characterized in that the bottom cover (11) is in an inverted cone shape, a sewage draining outlet (15) is arranged at the tip of the bottom cover (11), and a sewage draining valve (16) is arranged on the sewage draining outlet (15).

7. The natural gas filtering device according to claim 1, characterized in that the top of the fixed block (47) is conical.

8. The natural gas filtering device according to claim 1, characterized in that the housing (1) and the top cover (12), the housing (1) and the bottom cover (11) are connected by bolts.

9. The natural gas filtering device according to claim 1, characterized in that the top of the fixing rod (22) is provided with a thread, the fixing plate (3) is provided with a fixing hole (32) matched with the fixing rod (22), and the top of the fixing rod (22) passes through the fixing hole (32) of the fixing plate (3) and is fixedly connected through a bolt.

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