Cylindrical nuclear-grade high-efficiency air filter

Abstract

The utility model discloses a cylindrical nuclear-grade high-efficiency air filter which comprises an outer filter cartridge, a sealing cover plate used for sealing the outer filter cartridge is arranged at the top of the outer filter cartridge, a supporting plate is arranged on one side of the inner side wall of the outer filter cartridge, an inner filter cartridge is arranged on the supporting plate, and the inner filter cartridge is arranged on the inner side wall of the outer filter cartridge. A connecting assembly used for connecting the closed cover plate and the inner filter cylinder is arranged between the closed cover plate and the inner filter cylinder, a pressure spring is arranged between the connecting assembly and the inner filter cylinder, and the inner filter cylinder comprises a blind end plate, a ventilation end plate and a supporting rod fixedly installed between the blind end plate and the ventilation end plate. Cylindrical folding filter elements are arranged on the periphery of the lower surface of the blind end plate; according to the utility model, the outer filter cartridge, the sealing cover plate, the supporting plate, the inner filter cartridge, the connecting assembly and the pressure spring are matched, so that the sealing property and the overpressure resistance between the inner filter cartridge and the supporting plate can be obviously improved.

Description

Technical Field

[0001] The utility model relates to the field of nuclear-grade air filters, in particular to a cylindrical nuclear-grade high-efficiency air filter. Background Technique

[0002] High-efficiency filters play a crucial role in the radioactive aerosol treatment process in nuclear power plants. They are specifically designed for deep purification of the exhaust system, effectively intercepting and removing radioactive aerosol particles carried in the air flow, and are key equipment essential for ensuring the safe operation of nuclear facilities and environmental protection.

[0003] However, the inner filter cylinder of the existing cylindrical nuclear-grade air filter usually adheres to the support plate by its own weight. This simple sealing method has low reliability, and there is a potential leakage hazard at the contact part between the inner filter cylinder and the support plate when filtering overpressure air flow. Content of the Utility Model

[0004] To solve the defect that the inner filter cylinder of the existing technology usually adheres to the support plate by its own weight, this simple sealing method has low reliability, and there is a potential leakage hazard at the contact part between the inner filter cylinder and the support plate when filtering overpressure air flow, the utility model provides a cylindrical nuclear-grade high-efficiency air filter.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] A cylindrical nuclear-grade high-efficiency air filter of the utility model includes an outer filter cylinder. A closed cover plate for closing the outer filter cylinder is arranged at the top of the outer filter cylinder. A support plate is arranged on one side of the inner side wall of the outer filter cylinder. An inner filter cylinder is arranged on the support plate. A connection component for connecting the closed cover plate and the inner filter cylinder is arranged between the closed cover plate and the inner filter cylinder. A pressure spring is arranged between the connection component and the inner filter cylinder;

[0007] The inner filter cylinder includes a blind end plate, a ventilation end plate, and support rods fixedly installed between the blind end plate and the ventilation end plate. Cylindrical folded filters are arranged around the lower surface of the blind end plate. One section of the cylindrical folded filter away from the blind end plate is fixedly connected to the ventilation end plate.

[0008] As a preferred technical solution of the utility model, a feed pipe and a discharge pipe are respectively arranged on both sides of the outer side wall of the outer filter cylinder. The height of the discharge pipe is higher than that of the feed pipe. The support plate is horizontally arranged between the feed pipe and the discharge pipe. Ventilation openings are respectively arranged at the centers of the support plate and the ventilation end plate.

[0009] As a preferred technical solution of the utility model, perforated plate meshes are arranged on both the outer side wall and the inner side wall of the cylindrical folded filter between the blind end plate and the ventilation end plate.

[0010] As a preferred technical solution of the utility model, the connecting assembly includes an inner sleeve fixedly installed at the center of the lower surface of the closed cover plate, an outer sleeve rotatably connected to the outside of the inner sleeve, and a mushroom head clamping rod fixedly connected to the upper surface of the blind end plate and adapted to the inner sleeve. The inner side wall of the inner sleeve is provided with embedding grooves all around, and ceramic clamping beads are provided in the embedding grooves. The inner side wall of the outer sleeve is provided with arc-shaped grooves adapted to the ceramic clamping beads all around, and the pressure spring is fixedly connected to the bottom of the inner sleeve.

[0011] As a preferred technical solution of the utility model, lip-shaped sealing grooves are arranged around the upper surface of the support plate, and lip-shaped sealing gaskets matching the lip-shaped sealing grooves are arranged around the lower surface of the ventilation end plate.

[0012] As a preferred technical solution of the utility model, the outer side wall of the inner sleeve is fixedly connected to a fixing ring above the outer sleeve, and sliding grooves are evenly arranged around the lower surface of the fixing ring. A clamping block spring is fixedly connected to the inner top wall of the sliding groove, and an end of the clamping block spring away from the sliding groove is fixedly connected to an oblique head clamping rod matched with the sliding groove, and triangular clamping blocks matched with the oblique head clamping rod are fixedly connected around the upper surface of the outer sleeve.

[0013] As a preferred technical solution of the utility model, handles for rotating the outer sleeve are arranged around the outer side wall of the outer sleeve.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model is a nuclear pressure-bearing purification device. Through the cooperation of the outer filter cartridge, the closed cover plate, the support plate, the inner filter cartridge, the connection assembly, and the pressure spring, the inner filter cartridge and the closed cover plate can be connected to each other through the connection assembly and then hoisted at the same time. After the hoisting is completed, the pressure spring can apply a certain pressing force to the inner filter cartridge to improve the sealing and overpressure resistance between the inner filter cartridge and the support plate. At the same time, the support rod arranged in the inner filter cartridge can prevent the blind end plate from being deformed by the pressure as much as possible;

[0016] 2. The utility model is a nuclear pressure-bearing purification equipment. Through the arrangement of the orifice mesh, the orifice mesh arranged on the outer side wall of the cylindrical folded filter element can play a good protective role, thereby trying to avoid the staff from touching the filter element during the transportation process, resulting in damage to the filter paper. At the same time, it can improve the uniformity of the airflow after passing through the cylindrical folded filter element and entering the space above the support plate in the outer filter cylinder. The orifice mesh arranged on the inner side wall of the cylindrical folded filter element can increase the uniformity of the airflow when it enters the cylindrical folded filter element for filtration, thereby improving the filtering effect of the airflow in the cylindrical folded filter element;

[0017] 3. The pressure-bearing purification equipment for nuclear use of the present utility model, through the arrangement of the lip-shaped sealing groove and the lip-shaped sealing gasket, when the inner filter cylinder is located on the support plate, the lip-shaped sealing gasket is located in the lip-shaped sealing groove and abuts against the inner bottom wall of the lip-shaped sealing groove, thereby further improving the sealing performance between the ventilation end plate and the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0019] Figure 1 is a three-dimensional structural schematic diagram of a cylindrical nuclear-grade high-efficiency air filter of the present utility model;

[0020] Figure 2 is a front view sectional structural schematic diagram of a cylindrical nuclear-grade high-efficiency air filter of the present utility model;

[0021] Figure 3 is a Figure 2 magnified schematic diagram of the structure at A in a cylindrical nuclear-grade high-efficiency air filter of the present utility model;

[0022] Figure 4 is a Figure 2 magnified schematic diagram of the structure at B in a cylindrical nuclear-grade high-efficiency air filter of the present utility model;

[0023] Figure 5 is a schematic diagram of the triangular clamping block structure of a cylindrical nuclear-grade high-efficiency air filter of the present utility model.

[0024] In the figures: 1, outer filter cylinder; 2, closed cover plate; 3, support plate; 4, inner filter cylinder; 41, blind end plate; 42, ventilation end plate; 43, support rod; 44, cylindrical folded filter element; 45, lip-shaped sealing gasket; 5, connection assembly; 51, inner sleeve; 52, outer sleeve; 53, mushroom head clamping rod; 54, embedding groove; 55, ceramic clamping bead; 56, arc-shaped groove; 6, pressure spring; 7, feed pipe; 8, discharge pipe; 9, ventilation port; 10, perforated plate mesh; 11, lip-shaped sealing groove; 12, fixed ring; 13, sliding groove; 14, clamping block spring; 15, inclined head clamping rod; 16, triangular clamping block; 17, handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following is a description of the preferred embodiments of the present utility model with reference to the Figures 1-5 drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0026] Refer to Figure 1 and Figure 2, a cylindrical nuclear-grade high-efficiency air filter of the present utility model includes an outer filter cylinder 1. A closing cover plate 2 for closing the outer filter cylinder 1 is provided at the top of the outer filter cylinder 1. A support plate 3 is provided on one side of the inner side wall of the outer filter cylinder 1. An inner filter cylinder 4 is provided on the support plate 3. A connection component 5 for connecting the closing cover plate 2 and the inner filter cylinder 4 is provided between the closing cover plate 2 and the inner filter cylinder 4. A pressure spring 6 is provided between the connection component 5 and the inner filter cylinder 4;

[0027] Referring to Figure 1 and Figure 2 , the inner filter cylinder 4 includes a blind end plate 41, a ventilation end plate 42, and a support rod 43 fixedly installed between the blind end plate 41 and the ventilation end plate 42. Feed pipes 7 and discharge pipes 8 are respectively provided on both sides of the outer side wall of the outer filter cylinder 1. The height of the discharge pipe 8 is higher than that of the feed pipe 7. The support plate 3 is horizontally arranged between the feed pipe 7 and the discharge pipe 8. Ventilation openings 9 are respectively opened at the centers of the support plate 3 and the ventilation end plate 42. Circular cylinder folded filters 44 are provided around the lower surface of the blind end plate 41. One end of the circular cylinder folded filter 44 away from the blind end plate 41 is fixedly connected to the ventilation end plate 42. During use, the fluid first enters the space below the support plate 3 in the outer filter cylinder 1 through the feed pipe 7, then flows into the inside of the circular cylinder folded filter 44 through the ventilation opening 9, and after being filtered by the circular cylinder folded filter 44, it is discharged from the outer filter cylinder 1 through the discharge pipe 8;

[0028] Perforated plate meshes 10 are provided on both the outer side wall and the inner side wall of the circular cylinder folded filter 44 between the blind end plate 41 and the ventilation end plate 42. Through the setting of the perforated plate meshes 10, the perforated plate mesh 10 provided on the outer side wall of the circular cylinder folded filter 44 can play a good protective role, thereby minimizing the chance that the staff touches the filter element during handling, resulting in filter paper damage. At the same time, it can improve the uniformity of the air flow when it enters the space above the support plate 3 in the outer filter cylinder 1 after being filtered by the circular cylinder folded filter 44. The perforated plate mesh 10 provided on the inner side wall of the circular cylinder folded filter 44 can increase the uniformity of the air flow when it enters the circular cylinder folded filter 44 for filtration;

[0029] Referring to Figure 2 and Figure 3 , lip-shaped sealing grooves 11 are provided around the upper surface of the support plate 3. Lip-shaped sealing gaskets 45 adapted to the lip-shaped sealing grooves 11 are provided around the lower surface of the ventilation end plate 42. When the inner filter cylinder 4 is located on the support plate 3, the lip-shaped sealing gasket 45 is located in the lip-shaped sealing groove 11 and abuts against the bottom wall of the lip-shaped sealing groove 11, thereby maximizing the sealing performance between the ventilation end plate 42 and the support plate 3.

[0030] Referring to Figure 1 , Figure 2 and Figure 4, the connecting component 5 includes an inner sleeve 51 fixedly installed at the center of the lower surface of the closed cover plate 2, an outer sleeve 52 rotatably connected to the outside of the inner sleeve 51, and a mushroom head clamping rod 53 fixedly connected to the upper surface of the blind end plate 41 and adapted to the inner sleeve 51. Four sides of the outer side wall of the outer sleeve 52 are provided with handles 17 for rotating the outer sleeve 52. Four sides of the inner side wall of the inner sleeve 51 are respectively provided with grooves 54, and ceramic beads 55 are arranged in the grooves 54. The grooves 54 are tapered grooves, and the radius of the grooves 54 near the center of the inner sleeve 51 is smaller than the radius of the ceramic beads 55;

[0031] Four sides of the inner side wall of the outer sleeve 52 are respectively provided with arc-shaped grooves 56 adapted to the ceramic beads 55. The width of the arc-shaped grooves 56 is smaller than the diameter of the ceramic beads 55. During use, first rotate the outer sleeve 52 through the handle 17 until the arc-shaped grooves 56 are aligned with the grooves 54. At this time, insert the mushroom head clamping rod 53 into the inner sleeve 51. The mushroom head of the mushroom head clamping rod 53 first pushes the ceramic beads 55 to move into the arc-shaped grooves 56 and continues to move into the inner sleeve 51. Then rotate the outer sleeve 52. The inner side wall of the arc-shaped groove 56 pushes the ceramic beads 55 to reset, and further clamps and limits the mushroom head clamping rod 53, completing the connection between the closed cover plate 2 and the inner filter cylinder 4. The pressure spring 6 is fixedly connected to the bottom of the inner sleeve 51. After the closed cover plate 2 and the inner filter cylinder 4 are connected by the connecting component 5 and the inner filter cylinder 4 is placed on the support plate 3, the pressure spring 6 is compressed, generating pressure on the blind end plate 41, and further providing pressure to the whole inner filter cylinder 4, causing the lip-shaped sealing gasket 45 to deform to a certain extent in the lip-shaped sealing groove 11, thereby further improving the sealing performance between the lip-shaped sealing groove 11 and the lip-shaped sealing gasket 45.

[0032] Refer to Figure 4 and Figure 5 , a fixing ring 12 is fixedly connected to the outer side wall of the inner sleeve 51 above the outer sleeve 52. Four sides of the lower surface of the fixing ring 12 are evenly provided with sliding grooves 13. A clamping block spring 14 is fixedly connected to the inner top wall of the sliding grooves 13. One end of the clamping block spring 14 away from the sliding grooves 13 is fixedly connected with an inclined head clamping rod 15 adapted to the sliding grooves 13. Four sides of the upper surface of the outer sleeve 52 are fixedly connected with triangular clamping blocks 16 adapted to the inclined head clamping rods 15. When rotating the outer sleeve 52, the triangular clamping blocks 16 rotate with the outer sleeve 52, thereby pushing the inclined head clamping rod 15 to move upward first until it moves between two adjacent triangular clamping blocks 16 and then falls and resets. Through the setting of the clamping block spring 14, the force required to rotate the outer sleeve 52 and push the inclined head clamping rod 15 upward can be increased as much as possible, thereby minimizing the possibility of the outer sleeve 52 rotating by itself.

[0033] Working principle of the utility model: When it is used for the first time, first rotate the outer sleeve 52 through the handle 17 until the arc-shaped groove 56 is aligned with the embedding groove 54. At this time, insert the mushroom head clamping rod 53 fixedly connected to the inner filter cylinder 4 into the inner sleeve 51. The mushroom head of the mushroom head clamping rod 53 first pushes the ceramic clamping bead 55 to move into the arc-shaped groove 56 and continues to move into the inner sleeve 51. Then rotate the outer sleeve 52. The inner side wall of the arc-shaped groove 56 pushes the ceramic clamping bead 55 to reset, and further clamps and limits the mushroom head clamping rod 53, completing the connection between the closing cover plate 2 and the inner filter cylinder 4. Then hoist the closing cover plate 2 to close the outer filter cylinder 1. At this time, the inner filter cylinder 4 is also hoisted onto the abutting support plate 3, and the lip-shaped sealing gasket 45 abuts against the inner bottom wall of the lip-shaped sealing groove 11. After the inner filter cylinder 4 is placed on the support plate 3, the compression spring 6 is compressed, generating pressure on the blind end plate 41, and further providing pressure to the whole inner filter cylinder 4, causing a certain deformation of the lip-shaped sealing gasket 45 in the lip-shaped sealing groove 11, and further improving the sealing performance between the lip-shaped sealing groove 11 and the lip-shaped sealing gasket 45;

[0034] After the installation is completed, the fluid first enters the space below the support plate 3 in the outer filter cylinder 1 through the feed pipe 7, then flows into the inside of the cylindrical folded filter element 44 through the ventilation port 9, and after being filtered by the cylindrical folded filter element 44, it is discharged from the outer filter cylinder 1 through the discharge pipe 8;

[0035] When the inner filter cylinder 4 needs to be replaced after a long service time, directly lift the closing cover plate 2, and then lift the closing cover plate 2, the inner filter cylinder 4 and the connection assembly 5 for connecting the closing cover plate 2 and the inner filter cylinder 4 at the same time, and rotate them to the inside of the maintenance container. Then use the master-slave manipulator to rotate the outer sleeve 52 through the handle 17 until the arc-shaped groove 56 is aligned with the embedding groove 54 again. At this time, the compression spring 6 pushes the inner filter cylinder 4 and the mushroom head clamping rod 53 to move away from the closing cover plate 2. During this process, the mushroom head of the mushroom head clamping rod 53 first pushes the ceramic clamping bead 55 into the arc-shaped groove 56 and further moves away from the closing cover plate 2, and then falls off from the connection assembly 5. Then install the new inner filter cylinder 4 into the connection assembly 5, and hoist the closing cover plate 2 again to close the outer filter cylinder 1 to complete the replacement.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cylindrical nuclear-grade high-efficiency air filter, comprising an outer filter cylinder (1), characterized in that, A closed cover plate (2) for closing the outer filter cartridge (1) is provided at the top of the outer filter cartridge (1). A support plate (3) is provided on one side of the inner side wall of the outer filter cartridge (1). An inner filter cartridge (4) is provided on the support plate (3). A connecting component (5) for connecting the closed cover plate (2) and the inner filter cartridge (4) is provided between the closed cover plate (2) and the inner filter cartridge (4). A pressure spring (6) is provided between the connecting component (5) and the inner filter cartridge (4). The inner filter cartridge (4) includes a blind end plate (41), a ventilation end plate (42), and support rods (43) fixedly installed between the blind end plate (41) and the ventilation end plate (42). Cylindrical folded filters (44) are provided around the lower surface of the blind end plate (41). One end of the cylindrical folded filter (44) away from the blind end plate (41) is fixedly connected to the ventilation end plate (42).

2. The cylindrical nuclear-grade high-efficiency air filter according to claim 1, wherein A feed pipe (7) and a discharge pipe (8) are respectively provided on both sides of the outer side wall of the outer filter cartridge (1). The height of the discharge pipe (8) is higher than that of the feed pipe (7). The support plate (3) is horizontally arranged between the feed pipe (7) and the discharge pipe (8). Ventilation openings (9) are provided at the centers of the support plate (3) and the ventilation end plate (42).

3. The cylindrical nuclear-grade high-efficiency air filter according to claim 2, wherein Perforated plate meshes (10) are provided on both the outer side wall and the inner side wall of the cylindrical folded filter (44) between the blind end plate (41) and the ventilation end plate (42).

4. The cylindrical nuclear-grade high-efficiency air filter according to claim 2, wherein The connecting component (5) includes an inner sleeve (51) fixedly installed at the center of the lower surface of the closed cover plate (2), an outer sleeve (52) rotatably connected to the outside of the inner sleeve (51), and a mushroom head clamping rod (53) fixedly connected to the upper surface of the blind end plate (41) and adapted to the inner sleeve (51). Embedded grooves (54) are provided around the inner side wall of the inner sleeve (51). Ceramic clamping beads (55) are provided in the embedded grooves (54). Arc-shaped grooves (56) adapted to the ceramic clamping beads (55) are provided around the inner side wall of the outer sleeve (52). The pressure spring (6) is fixedly connected to the bottom of the inner sleeve (51).

5. The cylindrical nuclear-grade high-efficiency air filter according to claim 2, characterized in that, Lip-shaped sealing grooves (11) are provided around the upper surface of the support plate (3). Lip-shaped sealing pads (45) adapted to the lip-shaped sealing grooves (11) are provided around the lower surface of the ventilation end plate (42).

6. The cylindrical nuclear-grade high-efficiency air filter according to claim 4, characterized in that, A fixing ring (12) is fixedly connected to the outer side wall of the inner sleeve (51) above the outer sleeve (52). Sliding grooves (13) are uniformly provided around the lower surface of the fixing ring (12). A clamping block spring (14) is fixedly connected to the inner top wall of the sliding groove (13). One end of the clamping block spring (14) away from the sliding groove (13) is fixedly connected to an inclined head clamping rod (15) adapted to the sliding groove (13). Triangular clamping blocks (16) adapted to the inclined head clamping rods (15) are fixedly connected to the periphery of the upper surface of the outer sleeve (52).

7. The cylindrical nuclear-grade high-efficiency air filter according to claim 4, characterized in that, Handles (17) for rotating the outer sleeve (52) are provided around the outer side wall of the outer sleeve (52).

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