Nuclear pressure-bearing purification equipment

Abstract

The utility model discloses pressure-bearing type purification equipment for nuclear use. Comprising two purification shells arranged underground, a shielding cover plate fixedly connected to the tops of the two purification shells, an opening formed in the shielding cover plate and located above the two purification shells, an inlay sleeve fixedly installed in the opening and a shielding plug plate arranged in the inlay sleeve. The separation plate is arranged in the purification shell, the cylindrical filter is arranged above the separation plate, a filter element is arranged in the cylindrical filter, and an unhooking pressing assembly used for connecting the filter element and the shielding plug plate is arranged between the filter element and the shielding plug plate; monitoring assemblies for monitoring the filter element are arranged on the two sides of the lower surface of the shielding cover plate; through cooperation of the purification shell, the shielding cover plate, the opening, the inlay sleeve, the shielding plug plate, the partition plate, the cylindrical filter, the filter element and the unhooking pressing assembly, risks caused by manual operation are avoided, and meanwhile the replacement efficiency of the filter element is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of nuclear-grade air filters, in particular to a nuclear pressure-bearing purification device. Background Art

[0002] Nuclear pit-type purification equipment plays an important role in nuclear power plants and other industrial fields requiring a high degree of cleanliness. This equipment is typically designed to remove impurities such as dust, particulate matter, and harmful gases from gases to ensure air quality in sensitive areas such as nuclear power plants.

[0003] A search revealed a Chinese patent application with publication number CN210021446U, which describes a low-resistance pit-type air filtration and purification device. The device comprises an integrated cylindrical housing built into a factory pit, a first-stage filter and a second-stage filter symmetrically arranged at the bottom of the housing cavity, an air inlet connector fixed below the bottom wall of the housing and connected to the first-stage filter, an air outlet connector fixed below the bottom wall of the housing and connected to the second-stage filter, and a shielding cover and shielding plug sealing the upper opening of the housing. Seals are installed at the junction of the air inlet connector and the inlet end of the first-stage filter, and at the junction of the air outlet connector and the outlet end of the second-stage filter. This utility model optimizes the airflow structure of traditional pit-type filtration and purification devices, increases the effective airflow cross-section in the gas flow channel, and significantly reduces the resistance of the airflow system.

[0004] When the filter element of the above device is replaced after use, the filter needs to be replaced manually by staff after lifting and removing the shielding plug. During the replacement, there are problems such as low replacement efficiency and poor safety. Utility Model Content

[0005] In order to solve the defects of the prior art that when replacing the filter element after use, the filter needs to be replaced manually by staff after lifting and removing the shielding plug, and there are problems such as low replacement efficiency and poor safety during replacement, the utility model provides a nuclear pressure-bearing purification equipment.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] The utility model discloses a nuclear pressure-bearing purification device, comprising two purification shells arranged underground, a shielding cover plate fixedly connected to the top of the two purification shells, an opening provided on the shielding cover plate and located above the two purification shells, an inlay sleeve fixedly installed in the opening, a shielding plug plate arranged in the inlay sleeve, a partition plate arranged in the purification shell, and a cylindrical filter arranged above the partition plate, wherein a filter element is arranged inside the cylindrical filter, and a decoupling and pressing assembly for connecting the filter element and the shielding plug plate is provided between the filter element and the shielding plug plate;

[0008] Monitoring components for monitoring the filter element are provided on both sides of the lower surface of the shielding cover.

[0009] As a preferred technical solution of the present invention, the unhooking and pressing assembly includes an inner sleeve fixedly installed at the center of the lower surface of the shielding plug plate and a bearing plate fixedly connected to the top of the filter element, the center of the upper surface of the bearing plate is fixedly connected to a mushroom head clamping rod adapted to the inner sleeve, the top of the outer wall of the inner sleeve is threadedly connected to a threaded sleeve, an outer sleeve is provided on the outside of the inner sleeve below the threaded sleeve, the inner top wall of the outer sleeve is fixedly connected to an upper spring, and a section of the upper spring away from the outer sleeve is fixedly connected to the inner sleeve;

[0010] The inner side wall of the inner sleeve is provided with embedding grooves all around, and ceramic beads are arranged in the embedding grooves. The inner side wall of the outer sleeve is provided with arc-shaped embedding grooves adapted to the ceramic beads all around, and a lower spring is provided at the bottom of the inner sleeve.

[0011] As an optimal technical solution of the present invention, a feed pipe and a discharge pipe are provided on both sides of the outer walls of the two purification shells, and the height of the discharge pipe is higher than the feed pipe. The partition plate is horizontally arranged between the discharge pipe and the feed pipe. A feed port is provided in the center of the partition plate, and the discharge pipe arranged on one of the outer walls of the purification shell is connected to the feed pipe arranged on the outer wall of the other purification shell.

[0012] As a preferred technical solution of the present invention, tooth-shaped sealing grooves are provided around the inner bottom wall of the inlay sleeve, and tooth-shaped sealing gaskets matching the tooth-shaped sealing grooves are provided around the lower surface of the shielding plug plate.

[0013] As an optimal technical solution of the present invention, the monitoring component includes a detection sleeve arranged on both sides of the lower surface of the shielding cover and a gamma-ray measuring instrument arranged in the detection sleeve. The bottom end of the outer wall of the detection sleeve is provided with a covering lead sleeve, and a slit is opened on one side of the covering lead sleeve.

[0014] As a preferred technical solution of the present invention, positioning grooves are provided on all four sides of the lower surface of the inner sleeve, and positioning rods adapted to the positioning grooves are fixedly connected on all four sides of the upper surface of the load-bearing plate.

[0015] As a preferred technical solution of the present invention, the inner bottom wall of the detection sleeve is provided with a radiation-proof soft rubber pad for protecting the gamma-ray measuring instrument when it accidentally falls.

[0016] As a preferred technical solution of the present invention, handles for rotating the threaded sleeve are fixedly connected to the four sides of the outer side wall of the threaded sleeve.

[0017] As a preferred technical solution of the present invention, an interface for grabbing is provided at the center of the upper surface of the shielding plug plate.

[0018] As a preferred technical solution of the present invention, a detection opening communicating with the detection sleeve is provided on the shielding cover, and a protective plug is provided in the detection opening.

[0019] The beneficial effects of the utility model are:

[0020] 1. The utility model is a nuclear pressure-bearing purification equipment. Through the coordination of the purification housing, shielding cover, opening, inlay sleeve, shielding plug plate, partition plate, cylindrical filter, filter element and unhooking and pressing assembly, when the filter element needs to be replaced, the shielding plug plate, unhooking and pressing mechanism and filter element are lifted from the housing and transported to a maintenance container. In the maintenance container, the used cylindrical filter is disassembled by the master-slave manipulator. After the new cylindrical filter is installed, the shielding plug plate unhooking and pressing mechanism and the replaced filter element are re-lifted to the shielding plug plate and inserted into the inlay sleeve to complete the replacement. This avoids the safety risks caused by manual operation and effectively improves the efficiency of filter element replacement.

[0021] 2. This utility model is a pressure-bearing purification device for nuclear use. Through the cooperation of an inner sleeve, a bearing plate, a mushroom-head clamping rod, a threaded sleeve, an outer sleeve, an upper spring, a groove, a ceramic clamping bead, an arc-shaped clamping groove, and a lower spring, when the filter element is connected to the shielding plug plate and positioned within the cylindrical filter, the lower spring can exert downward pressure on the filter element, ensuring close contact between the filter element and the partition plate, improving the stability of the filter element and the sealing between the filter element and the partition plate, and thereby maximizing the overall filtering effect of the device.

[0022] 3. This utility model is a nuclear pressure-type purification equipment. Through the arrangement of the positioning rod and the positioning groove, when the filter element is connected to the shielding plug plate through the unhooking and pressing assembly, the positioning rod is inserted into the positioning groove, thereby further improving the stability of the filter element after being connected to the shielding plug plate;

[0023] 4. The utility model is a nuclear pressure-type purification equipment. By setting up a monitoring component, the staff can monitor the dose rate level in a single filter element through the slit using a gamma-ray measuring instrument, which is convenient for the staff to determine the use time of the filter element and judge whether it needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of a nuclear pressure-bearing purification device of the present invention;

[0026] Figure 2 This is a schematic diagram of the main cross-sectional structure of a nuclear pressure-bearing purification device of the utility model;

[0027] Figure 3 This utility model is a nuclear pressure-bearing purification equipment Figure 2 A schematic diagram of the structure at center A;

[0028] Figure 4 This utility model is a nuclear pressure-bearing purification equipment Figure 2 A magnified schematic diagram of the structure at point B;

[0029] Figure 5 The utility model is a schematic diagram of the main sectional structure of a coated lead sleeve of a nuclear pressure-bearing purification device.

[0030] In the figure: 1. Purification shell; 2. Shielding cover; 3. Opening; 4. Inlaid sleeve; 5. Shielding plug plate; 6. Partition plate; 7. Cylindrical filter; 8. Filter element; 9. Inner sleeve; 10. Load-bearing plate; 11. Mushroom head clamping rod; 12. Threaded sleeve; 13. Outer sleeve; 14. Upper spring; 15. Embedded groove; 16. Ceramic clamping bead; 17. Arc clamping groove; 18. Lower spring; 19. Feed pipe; 20. Discharge pipe; 21. Feed port; 22. Tooth-shaped sealing groove; 23. Tooth-shaped sealing gasket; 24. Detection sleeve; 25. Gamma ray measuring instrument; 26. Covered lead sleeve; 27. Slit; 28. Positioning groove; 29. Positioning rod; 30. Anti-radiation soft rubber pad; 31. Handle; 32. Interface; 33. Detection opening; 34. Protective plug. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 While describing the preferred embodiments of the present invention, it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] Reference Figure 1 and Figure 2 The utility model discloses a nuclear pressure-bearing purification device, comprising two purification housings 1 disposed underground, a shielding cover plate 2 fixedly connected to the tops of the two purification housings 1, an opening 3 formed in the shielding cover plate 2 above the two purification housings 1, an inlay sleeve 4 fixedly mounted in the opening 3, a shielding plug plate 5 disposed in the inlay sleeve 4, a partition plate 6 disposed in the purification housing 1, and a cylindrical filter 7 disposed above the partition plate 6. The inlay sleeve 4 is fixedly mounted in the opening 3 by bolts, and the shielding plug plate 5 overlaps the protrusion of the inner side wall of the inlay sleeve 4.

[0033] Reference Figure 1 、 Figure 2 and Figure 3, a feed pipe 19 and a discharge pipe 20 are provided on both sides of the outer walls of the two purification shells 1, and the height of the discharge pipe 20 is higher than the feed pipe 19, the partition plate 6 is horizontally arranged between the discharge pipe 20 and the feed pipe 19, and a feed port 21 is provided in the center of the partition plate 6. The fluid enters the purification shell 1 through the feed pipe 19, and then enters the space above the partition plate 6 in the purification shell 1 through the feed port 21. The discharge pipe 20 provided on the outer wall of one purification shell 1 is connected to the feed pipe 19 provided on the outer wall of the other purification shell 1. A tooth-shaped sealing groove 22 is provided around the inner bottom wall of the inlay sleeve 4, and a tooth-shaped sealing gasket 23 adapted to the tooth-shaped sealing groove 22 is provided around the lower surface of the shielding plug plate 5;

[0034] A filter element 8 is provided inside the cylindrical filter 7. When the fluid enters the space above the partition plate 6 in the purification housing 1 through the feed port 21, the filter element 8 first filters the fluid. The filtered fluid is then discharged from the purification housing 1 through the discharge pipe 20. A decoupling and pressing assembly for connecting the filter element 8 and the shielding plug plate 5 is provided between the filter element 8 and the shielding plug plate 5.

[0035] Reference Figure 4 The unhooking and pressing assembly includes an inner sleeve 9 fixedly mounted on the center of the lower surface of the shielding plug plate 5 and a bearing plate 10 fixedly connected to the top of the filter element 8. The center of the upper surface of the bearing plate 10 is fixedly connected with a mushroom head clamping rod 11 adapted to the inner sleeve 9. The top of the outer wall of the inner sleeve 9 is threadedly connected with a threaded sleeve 12. The top of the outer wall of the inner sleeve 9 is provided with a threaded wall. The inner side wall of the threaded sleeve 12 is provided with a threaded groove adapted to the threaded wall. The threaded sleeve 12 is threadedly connected to the inner sleeve 9 through the threaded wall and the threaded groove.

[0036] A handle 31 for rotating the threaded sleeve 12 is fixedly connected to the outer wall of the threaded sleeve 12. An outer sleeve 13 is provided on the outer side of the inner sleeve 9 and below the threaded sleeve 12. An upper spring 14 is fixedly connected to the inner top wall of the outer sleeve 13. A section of the upper spring 14 away from the outer sleeve 13 is fixedly connected to the inner sleeve 9.

[0037] Reference Figure 4 The inner side wall of the inner sleeve 9 is provided with an embedding groove 15 on all sides, and a ceramic card bead 16 is provided in the embedding groove 15. The embedding groove 15 is a conical groove, and the radius of the embedding groove 15 near the center of the inner sleeve 9 is smaller than the radius of the ceramic card bead 16. The inner side wall of the outer sleeve 13 is provided with an arc-shaped card groove 17 adapted to the ceramic card bead 16 on all sides, and the width of the arc-shaped card groove 17 is smaller than the diameter of the ceramic card bead 16. A lower spring 18 is provided at the bottom of the inner sleeve 9;

[0038] During the initial installation, first rotate the threaded sleeve 12 by the handle 31 and move the threaded sleeve 12 downward, thereby pushing the outer sleeve 13 downward until the arc groove 17 is flush with the ceramic card bead 16, and then insert the mushroom head clamping rod 11 fixedly connected to the cylindrical filter 7 into the inner sleeve 9. During this process, the mushroom head clamping rod 11 first pushes the ceramic card bead 16 into the arc groove 17 and continues to move toward the top wall of the inner sleeve 9, and then rotate the threaded sleeve 12 and move it upward, thereby The arc-shaped card slot 17 moves upward, and at the same time, the inner side wall of the arc-shaped card slot 17 pushes the ceramic card bead 16 to move toward the side of the mushroom head card rod 11 until the mushroom head of the mushroom head card rod 11 is engaged, thereby connecting the unhooking and pressing assembly between the shielding plug plate 5 and the filter element 8. At this time, the shielding plug plate 5 is hoisted into the inlay sleeve 4. After the bottom of the filter element abuts the partition plate 6, the shielding plug plate 5 continues to press down, and the lower spring 18 is compressed, which generates downward pressure on the filter element 8 to ensure that the filter element 8 and the partition plate 6 are in close contact;

[0039] Reference Figure 4 , an interface 32 for grabbing is provided at the center of the upper surface of the shielding plug plate 5. When the filter element 8 of the cylindrical filter 7 needs to be replaced, the lifting device of the maintenance container is connected to the shielding plug plate 5 through the interface 32, and then the shielding plug plate 5, the unhooking and pressing mechanism and the filter element 8 are lifted from the shell and transported to the maintenance container. In the maintenance container, the master-slave manipulator rotates the threaded sleeve 12 through the handle 31 and moves the threaded sleeve 12 downward, thereby pushing the outer sleeve 13 downward until the arc-shaped card groove 17 is flush with the ceramic card bead 16 again, and then the lower spring 18 pushes the filter element 8 to move away from the inner sleeve 9. During this process, the mushroom head card rod 11 pushes the ceramic card bead 16 into the arc-shaped card groove 17 and continues to move away from the inner sleeve 9, thereby disassembling the used cylindrical filter 7;

[0040] After installing the new cylindrical filter 7, unhook the shielding plug plate 5 from the pressing mechanism and re-lift the replaced filter element 8 to the shielding plug plate 5 into the inserting sleeve 4, then remove the lifting tool from the interface 32 to complete the replacement.

[0041] Reference Figure 4 , positioning grooves 28 are provided around the lower surface of the inner sleeve 9, and positioning rods 29 adapted to the positioning grooves 28 are fixedly connected around the upper surface of the load-bearing plate 10. When the filter element 8 is connected to the unhooking and pressing assembly, the positioning rods 29 are inserted into the positioning grooves 28, thereby improving the stability of the filter element 8 as much as possible;

[0042] Reference Figure 1 、 Figure 2 and Figure 5, monitoring components for monitoring the filter element 8 are provided on both sides of the lower surface of the shielding cover 2. The monitoring components include detection sleeves 24 provided on both sides of the lower surface of the shielding cover 2 and a gamma-ray measuring instrument 25 provided in the detection sleeve 24. A covering lead sleeve 26 is provided at the bottom end of the outer wall of the detection sleeve 24. A slit 27 is provided on one side of the covering lead sleeve 26. The two slits 27 provided on the outer wall of the covering lead sleeve 26 face the two cylindrical filters 7 respectively, thereby monitoring the dose rate level of the filter element 8 in the cylindrical filter 7;

[0043] The inner bottom wall of the detection sleeve 24 is provided with a radiation-proof soft rubber pad 30 for protecting the gamma-ray measuring instrument 25 when the gamma-ray measuring instrument 25 accidentally falls. A detection opening 33 connected to the detection sleeve 24 is opened on the shielding cover 2. A protective plug 34 is provided in the detection opening 33. When installing the equipment, the gamma-ray measuring instrument 25 is first placed in the detection sleeve 24 through the detection opening 33. A wiring groove is provided on the shielding cover 2 for the wiring arrangement of the gamma-ray measuring instrument 25. After the cable is laid, it is sealed with a special cover. The sealed surface is flush with the upper surface of the shielding cover 2 and has good sealing and anti-water seepage function. Then the protective plug 34 is hoisted into the detection opening 33 to seal the detection opening 33.

[0044] The working principle of the present utility model is as follows: when the device is initially installed, the threaded sleeve 12 is first rotated by the handle 31 and the threaded sleeve 12 is moved downward, thereby pushing the outer sleeve 13 downward until the arc-shaped groove 17 is flush with the ceramic card bead 16, and then the mushroom head clamping rod 11 fixedly connected to the cylindrical filter 7 is inserted into the inner sleeve 9. During this process, the mushroom head clamping rod 11 first pushes the ceramic card bead 16 into the arc-shaped groove 17 and continues to move toward the inner top wall of the inner sleeve 9, and then the threaded sleeve 12 is rotated and the outer sleeve 13 is pushed downward until the arc-shaped groove 17 is flush with the ceramic card bead 16. It moves upward, thereby causing the arc-shaped card slot 17 to move upward. At the same time, the inner side wall of the arc-shaped card slot 17 pushes the ceramic card bead 16 to move toward the side of the mushroom head card rod 11 until the mushroom head of the mushroom head card rod 11 is engaged, thereby connecting the unhooking and pressing assembly between the shielding plug plate 5 and the filter element 8. At this time, the shielding plug plate 5 is hoisted into the inlay sleeve 4. After the bottom of the filter element abuts the partition plate 6, the shielding plug plate 5 continues to press down, and the lower spring 18 is compressed, generating downward pressure on the filter element 8 to ensure that the filter element 8 and the partition plate 6 are in close contact.

[0045] The gamma-ray measuring instrument 25 is then placed in the detection sleeve 24 through the detection opening 33. The shielding cover 2 is provided with a wiring slot for arranging the wiring of the gamma-ray measuring instrument 25. After the cable is laid, a special sealing cover is used to seal it. The sealing surface is flush with the upper surface of the shielding cover 2 and has good sealing and anti-water seepage function. Then, the protective plug 34 is hoisted into the detection opening 33 to seal the detection opening 33.

[0046] During use, the fluid enters the purification housing 1 through the feed pipe 19, and then enters the space above the partition plate 6 in the purification housing 1 through the feed port 21. The filter element 8 first filters the fluid, and the filtered fluid is then discharged from the purification housing 1 through the discharge pipe 20. At the same time, after entering one of the purification housings 1 for filtration, the fluid enters the other purification housing 1 through the discharge pipe 20 connected to the feed pipe 19 on the outer wall of the purification housing 1 and is filtered again.

[0047] The gamma ray measuring instruments 25 in the two detection sleeves 24 monitor the dose rate levels of the two filter elements 8 through the two slits 27 respectively;

[0048] When the filter element 8 needs to be replaced, the lifting fixture of the maintenance container is connected to the shielding plug plate 5 through the interface 32, and then the shielding plug plate 5, the unhooking and pressing mechanism and the filter element 8 are lifted from the shell and transported to the maintenance container. In the maintenance container, the master-slave manipulator rotates the threaded sleeve 12 through the handle 31 and moves the threaded sleeve 12 downward, thereby pushing the outer sleeve 13 downward until the arc-shaped groove 17 is flush with the ceramic clamping bead 16 again, and then the lower spring 18 pushes the filter element 8 to the side away from the inner sleeve 9. During this process, the mushroom head clamping rod 11 pushes the ceramic clamping bead 16 into the arc-shaped groove 17 and continues to move to the side away from the inner sleeve 9, thereby disassembling the used cylindrical filter 7. After the new cylindrical filter 7 is installed again, the shielding plug plate 5 is unhooked and the pressing mechanism and the replaced filter element 8 are re-lifted to the shielding plug plate 5 and enter the inlay sleeve 4, and then the lifting fixture is removed from the interface 32 to complete the replacement.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A nuclear pressure-type purification equipment, comprising two purification shells (1) arranged underground, a shielding cover (2) fixedly connected to the top of the two purification shells (1), an opening (3) opened on the shielding cover (2) and located above the two purification shells (1), an inlay sleeve (4) fixedly installed in the opening (3), a shielding plug plate (5) arranged in the inlay sleeve (4), a partition plate (6) arranged in the purification shell (1) and a cylindrical filter (7) arranged above the partition plate (6), characterized in that: A filter element (8) is provided inside the cylindrical filter (7), and a decoupling and pressing assembly for connecting the filter element (8) and the shielding plug plate (5) is provided between the filter element (8) and the shielding plug plate (5); Monitoring components for monitoring the filter element (8) are provided on both sides of the lower surface of the shielding cover plate (2).

2. A nuclear pressure-bearing purification device according to claim 1, wherein the unhooking and pressing assembly comprises an inner sleeve (9) fixedly mounted at the center of the lower surface of the shielding plug plate (5) and a load-bearing plate (10) fixedly connected to the top of the filter element (8), the center of the upper surface of the load-bearing plate (10) is fixedly connected with a mushroom head clamping rod (11) adapted to the inner sleeve (9), the top of the outer wall of the inner sleeve (9) is threadedly connected with a threaded sleeve (12), an outer sleeve (13) is provided on the outside of the inner sleeve (9) below the threaded sleeve (12), an inner top wall of the outer sleeve (13) is fixedly connected with an upper spring (14), and a section of the upper spring (14) away from the outer sleeve (13) is fixedly connected to the inner sleeve (9); The inner side wall of the inner sleeve (9) is provided with embedding grooves (15) on all sides, and ceramic clamping beads (16) are arranged in the embedding grooves (15). The inner side wall of the outer sleeve (13) is provided with arc-shaped clamping grooves (17) adapted to the ceramic clamping beads (16) on all sides, and a lower spring (18) is provided at the bottom of the inner sleeve (9).

3. A nuclear pressure-type purification equipment according to claim 2, characterized in that: A feed pipe (19) and a discharge pipe (20) are provided on both sides of the outer walls of the two purification shells (1), and the height of the discharge pipe (20) is higher than that of the feed pipe (19). The partition plate (6) is horizontally arranged between the discharge pipe (20) and the feed pipe (19). A feed port (21) is provided at the center of the partition plate (6), and the discharge pipe (20) provided on the outer wall of one purification shell (1) is connected to the feed pipe (19) provided on the outer wall of the other purification shell (1).

4. A nuclear pressure-type purification equipment according to claim 3, characterized in that: The inner bottom wall of the inlay sleeve (4) is provided with tooth-shaped sealing grooves (22) around its periphery, and the lower surface of the shielding plug plate (5) is provided with tooth-shaped sealing pads (23) adapted to the tooth-shaped sealing grooves (22) around its periphery.

5. The nuclear pressure-type purification equipment according to claim 1, characterized in that: The monitoring assembly comprises a detection sleeve (24) arranged on both sides of the lower surface of the shielding cover (2) and a gamma ray measuring instrument (25) arranged in the detection sleeve (24); a lead sheath (26) is provided at the bottom end of the outer wall of the detection sleeve (24); and a slit (27) is provided on one side of the lead sheath (26).

6. The nuclear pressure-type purification equipment according to claim 3, characterized in that: Positioning grooves (28) are provided on all four sides of the lower surface of the inner sleeve (9), and positioning rods (29) that are compatible with the positioning grooves (28) are fixedly connected on all four sides of the upper surface of the load-bearing plate (10).

7. The nuclear pressure-type purification equipment according to claim 5, characterized in that: The inner bottom wall of the detection sleeve (24) is provided with an anti-radiation soft rubber pad (30) for protecting the gamma ray measuring instrument (25) when the gamma ray measuring instrument (25) accidentally falls.

8. The nuclear pressure-type purification equipment according to claim 3, characterized in that: A handle (31) for rotating the threaded sleeve (12) is fixedly connected to the periphery of the outer side wall of the threaded sleeve (12).

9. The nuclear pressure-type purification equipment according to claim 3, characterized in that: An interface (32) for grabbing is provided at the center of the upper surface of the shielding plug plate (5).

10. The nuclear pressure-type purification equipment according to claim 7, characterized in that: The shielding cover plate (2) is provided with a detection opening (33) that is in communication with the detection sleeve (24), and a protective plug (34) is provided in the detection opening (33).

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