Cutting device for supercritical carbon dioxide stream-carried dry ice
Through the supercritical carbon dioxide flow-carrying dry ice cutting device, the dry ice cutting head and protective cover system are used to solve the problems of low cutting efficiency and environmental pollution during the decommissioning of the nuclear facility, and an efficient and environmentally friendly cutting effect is achieved.
Patent Information
- Application Number
- CN202422020725.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-20
AI Technical Summary
During the decommissioning of existing nuclear facilities, commonly used cold cutting and hot cutting technologies have problems such as low cutting efficiency, high consumables or large amounts of wastewater and radioactive aerosols, which affect the environment and increase secondary waste.
A cutting device with supercritical carbon dioxide flow-carrying dry ice is used to supply dry ice to the cutting head through a dry ice conduit for cutting, and the carbon dioxide gas is recovered through a protective cover and air conduit to prevent environmental pollution and personnel harm.
It improves cutting efficiency, reduces environmental pollution and secondary waste, protects the safety of staff, and achieves an efficient and environmentally friendly cutting process.
Smart Images
Figure CN223130766U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cutting of decommissioned nuclear facilities, in particular to a cutting device for supercritical carbon dioxide flow-carrying dry ice. Background Art
[0002] During the implementation process of the decommissioning site of nuclear facilities, whether it is the demolition of equipment or the disassembly of demolition items, radioactive cutting operations are involved. For example, during the decommissioning of nuclear power plants, the cutting and disassembly of reactor pressure vessels, the cutting and disassembly of the main pipelines of the primary loop system, etc.
[0003] Currently, the commonly used cutting methods are mainly divided into two types: cold cutting and thermal cutting. Cold cutting technologies mainly include diamond wire saws, circular saws, high-pressure water jet cutting, etc.; thermal cutting technologies mainly include underwater plasma cutting, oxyacetylene torch cutting, etc. However, mechanical cold cutting methods such as diamond wire saws and circular saws have low cutting efficiency and consume a large amount of consumables; high-pressure water jet cutting and underwater plasma cutting will generate a large amount of secondary wastewater; oxyacetylene torch cutting will generate a large amount of radioactive aerosols. At the decommissioning site, the increase in the amount of secondary waste will also have an impact on the environment. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a cutting device for supercritical carbon dioxide flow-carrying dry ice.
[0005] To achieve the above object, the utility model adopts the following technical solution: A cutting device for supercritical carbon dioxide fluid-carrying dry ice, including a cutting table, a moving groove is opened inside the cutting table, a moving motor is fixedly connected to the outer wall on the right side of the cutting table, an output end of the moving motor is fixedly connected to a moving lead screw, the other end of the moving lead screw extends into the moving groove, a gantry is threadedly connected to the outer wall of the moving lead screw, the bottom of the gantry is located inside the moving groove, a sliding groove is opened at the top of the gantry, an adjusting motor is fixedly connected to the outer wall of the gantry, an output end of the adjusting motor is fixedly connected to an adjusting lead screw, the other end of the adjusting lead screw extends into the sliding groove, both ends of the outer wall of the adjusting lead screw are threadedly connected with sliders, rotating grooves are opened at the bottoms of the two sliders, a connecting rod is movably connected to the inner wall of the rotating groove, a lifting plate is arranged inside the gantry, U-shaped plates are fixedly connected to both ends at the top of the lifting plate, the other ends of the two connecting rods are respectively movably connected to the two U-shaped plates, a cutting head is installed inside the lifting plate, a protective cover is fixedly connected to the bottom of the lifting plate, an annular groove is opened inside the protective cover, air suction ports are opened on the inner wall of the protective cover, and the number of the air suction ports is multiple, and multiple air suction ports are all communicated with the annular groove, a cutting air pump is fixedly connected to the top of the gantry, the cutting air pump is connected with the protective cover through a gas guide pipe, a dry ice conduit is fixedly connected to the outer wall of the cutting head, and an exhaust pipe is fixedly connected to the outer wall of the cutting air pump.
[0006] As a further description of the above technical solution:
[0007] Limiting grooves are opened on the inner wall of the gantry, and the number of the limiting grooves is two, and limiting blocks are fixedly connected to both outer walls of the lifting plate.
[0008] As a further description of the above technical solution:
[0009] Springs are fixedly connected to the tops of the two limiting blocks, and the tops of the springs are fixedly connected to the inner wall tops of the limiting grooves.
[0010] As a further description of the above technical solution:
[0011] Rectangular grooves are opened on the top of the cutting table, and the number of the rectangular grooves is multiple, communication grooves are opened at the bottoms of the inner walls of the multiple rectangular grooves, an air guide chamber is opened inside the cutting table, and the multiple communication grooves are all communicated with the air guide chamber.
[0012] As a further description of the above technical solution:
[0013] A support plate is fixedly connected to the left outer wall of the cutting table. A recovery air pump is fixedly connected to the top of the support plate. The air inlet of the recovery air pump is communicated with the air guide chamber. A recovery conduit is fixedly connected to the outer wall of the recovery air pump.
[0014] As a further description of the above technical solution:
[0015] Guard plates are fixedly connected to both outer walls of the cutting table. The two sides of the gantry are respectively located inside the two guard plates. Collection boxes are fixedly connected to both outer walls of the cutting table.
[0016] The utility model has the following beneficial effects:
[0017] 1. Place the component to be cut on the cutting table. Then, adjust the motor to run and drive the adjusting screw rod to rotate, so that the two sliders move away from each other. The two sliders respectively drive one end of the connecting rod movably connected thereto to move together with the slider. The other ends of the two connecting rods push the U-shaped plate and the lifting plate downward, so that the protective cover moves downward synchronously until the bottom of the protective cover contacts the upper surface of the component to be cut. The moving motor runs and drives the moving screw rod to rotate, and the bottom of the gantry then moves in the moving groove, so that the entire gantry moves until the cutting head moves to the edge of the component to be cut. Then, the moving motor stops running. Dry ice is introduced into the cutting head through the dry ice conduit. The moving motor runs again to drive the gantry to move, so that the cutting head moves along the upper surface of the component to be cut for cutting. Since the protective cover is located outside the cutting head, during cutting, the cutting air pump works, and the carbon dioxide gas generated during the cutting of the cutting head is discharged into the carbon dioxide gas recovery tank through the protective cover, the air guide pipe, and finally the exhaust pipe. The cutting efficiency is high, and at the same time, it can prevent environmental pollution and prevent the staff from inhaling too much carbon dioxide and getting into danger. Currently, the commonly used cutting methods are mainly divided into two types: cold cutting and hot cutting. Cold cutting technologies mainly include diamond wire sawing, circular sawing, high-pressure water jet cutting, etc.; hot cutting technologies mainly include underwater plasma cutting, oxyacetylene torch cutting, etc. However, mechanical cold cutting methods such as diamond wire sawing and circular sawing have low cutting efficiency and consume a large amount of consumables; high-pressure water jet cutting and underwater plasma cutting will generate a large amount of secondary wastewater; oxyacetylene torch cutting will generate a large amount of radioactive aerosol. At the decommissioning site, the amount of secondary waste increases, and at the same time, it will also have an impact on the environment. This device has high cutting efficiency, can prevent environmental pollution, and can prevent the staff from inhaling too much carbon dioxide and getting into danger.
[0018] 2. When cutting, the recovery air pump operates to suck the carbon dioxide gas passing through the part to be cut into the air guide chamber through the rectangular groove, and finally discharge it into the carbon dioxide gas recovery tank through the recovery conduit inside the recovery air pump, which also plays the role of preventing and reducing pollution and protecting the staff. During cutting, a certain amount of waste residue will be generated. When cleaning the waste residue, the waste residue is pushed towards the side guard plate, and due to the blockage of the guard plate, the waste residue will fall into the collection box, which is convenient for subsequent centralized treatment of the waste residue. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 FIG. 6 is an overall structural schematic diagram of a cutting device for supercritical carbon dioxide fluidized dry ice from a first perspective proposed by the present invention;
[0020] Figure 2 FIG. 7 is an overall structural schematic diagram of a cutting device for supercritical carbon dioxide fluidized dry ice from a second perspective proposed by the present invention;
[0021] Figure 3 FIG. 8 is a structural schematic diagram of a gantry of a cutting device for supercritical carbon dioxide fluidized dry ice proposed by the present invention;
[0022] Figure 4 FIG. 9 is a structural schematic diagram of a protective cover of a cutting device for supercritical carbon dioxide fluidized dry ice proposed by the present invention;
[0023] Figure 5 FIG. 10 is a structural schematic diagram of a lifting plate of a cutting device for supercritical carbon dioxide fluidized dry ice proposed by the present invention;
[0024] Figure 6 FIG. 11 is a structural schematic diagram of an annular groove of a cutting device for supercritical carbon dioxide fluidized dry ice proposed by the present invention;
[0025] Figure 7 FIG. 12 is an internal structural schematic diagram of a cutting device for supercritical carbon dioxide fluidized dry ice proposed by the present invention;
[0026] Figure 8 FIG. 13 is a Figure 7 schematic enlarged view of structure A of a cutting device for supercritical carbon dioxide fluidized dry ice proposed by the present invention.
[0027] LEGEND DESCRIPTION:
[0028] 1. Cutting table; 2. Moving groove; 3. Moving motor; 4. Moving lead screw; 5. Gantry; 6. Sliding groove; 7. Adjusting motor; 8. Adjusting lead screw; 9. Slide block; 10. Rotating groove; 11. Connecting rod; 12. Lifting plate; 13. U-shaped plate; 14. Cutting head; 15. Protective cover; 16. Annular groove; 17. Suction port; 18. Cutting air pump; 19. Air duct; 20. Dry ice duct; 21. Exhaust pipe; 22. Limiting groove; 23. Limiting block; 24. Spring; 25. Rectangular groove; 26. Connecting groove; 27. Air guide chamber; 28. Support plate; 29. Recycling air pump; 30. Recycling duct; 31. Protective plate; 32. Collection box. Detailed implementation manner
[0029] Refer to Figures 1-8 , a cutting device for supercritical carbon dioxide flow-carrying dry ice provided by the present utility model: includes a cutting table 1, a moving groove 2 is opened inside the cutting table 1, a moving motor 3 is fixedly connected to the right outer wall of the cutting table 1, the output end of the moving motor 3 is fixedly connected to a moving lead screw 4, the other end of the moving lead screw 4 extends into the inside of the moving groove 2, a gantry 5 is threadedly connected to the outer wall of the moving lead screw 4, the bottom of the gantry 5 is located inside the moving groove 2, a sliding groove 6 is opened at the top of the gantry 5, an adjusting motor 7 is fixedly connected to the outer wall of the gantry 5, the output end of the adjusting motor 7 is fixedly connected to an adjusting lead screw 8, the other end of the adjusting lead screw 8 extends into the inside of the sliding groove 6, both ends of the outer wall of the adjusting lead screw 8 are threadedly connected to a slide block 9, rotating grooves 10 are opened at the bottoms of both slide blocks 9, a connecting rod 11 is movably connected to the inner wall of the rotating groove 10, a lifting plate 12 is arranged inside the gantry 5, U-shaped plates 13 are fixedly connected to both ends of the top of the lifting plate 12, the other ends of the two connecting rods 11 are respectively movably connected to the two U-shaped plates 13, a cutting head 14 is installed inside the lifting plate 12, a protective cover 15 is fixedly connected to the bottom of the lifting plate 12, an annular groove 16 is opened inside the protective cover 15, a suction port 17 is opened on the inner wall of the protective cover 15, and the number of the suction ports 17 is multiple, and multiple suction ports 17 are all communicated with the annular groove 16, a cutting air pump 18 is fixedly connected to the top of the gantry 5, the cutting air pump 18 is connected to the protective cover 15 through an air duct 19, a dry ice duct 20 is fixedly connected to the outer wall of the cutting head 14, and an exhaust pipe 21 is fixedly connected to the outer wall of the cutting air pump 18.
[0030] Place the part to be cut on the cutting table 1. Subsequently, adjust the operation of the motor 7 to drive the adjustment lead screw 8 to rotate, causing the two sliders 9 to move away from each other. The two sliders 9 respectively drive one end of the connecting rod 11 movably connected thereto to move together with the slider 9. The other ends of the two connecting rods 11 push the U-shaped plate 13 and the lifting plate 12 downward, thereby synchronously moving the protective cover 15 downward until the bottom of the protective cover 15 contacts the upper surface of the part to be cut. The moving motor 3 operates to drive the moving lead screw 4 to rotate, and the bottom of the gantry 5 then moves in the moving groove 2, thereby moving the entire gantry 5 until the cutting head 14 moves to the edge of the part to be cut. Subsequently, the moving motor 3 stops operating. Dry ice is introduced into the cutting head 14 through the dry ice conduit 20. The moving motor 3 operates again to drive the gantry 5 to move, thereby causing the cutting head 14 to move along the upper surface of the part to be cut for cutting. Since the protective cover 15 is located outside the cutting head 14, during cutting, the cutting air pump 18 works, and the carbon dioxide gas generated during the cutting of the cutting head 14 is discharged into the carbon dioxide gas recovery tank through the protective cover 15, the air duct 19, and finally through the exhaust pipe 21.
[0031] Limit grooves 22 are provided on the inner wall of the gantry 5, and the number of the limit grooves 22 is two. Limiting blocks 23 are fixedly connected to the outer walls on both sides of the lifting plate 12. Springs 24 are fixedly connected to the tops of the two limiting blocks 23, and the tops of the springs 24 are fixedly connected to the top of the inner wall of the limit groove 22. When the lifting plate 12 moves up and down, the limiting blocks 23 move along the limit grooves 22. Cooperating with the springs 24, while enabling the lifting plate 12 to move stably up and down, it is convenient for the lifting plate 12 to return to its original position after moving downward.
[0032] Rectangular grooves 25 are provided on the top of the cutting table 1, and the number of the rectangular grooves 25 is multiple. Communication grooves 26 are provided at the bottoms of the inner walls of the multiple rectangular grooves 25. An air guide chamber 27 is provided inside the cutting table 1, and the multiple communication grooves 26 are all communicated with the air guide chamber 27. A support plate 28 is fixedly connected to the left outer wall of the cutting table 1. A recovery air pump 29 is fixedly connected to the top of the support plate 28. The air inlet of the recovery air pump 29 is communicated with the air guide chamber 27. A recovery conduit 30 is fixedly connected to the outer wall of the recovery air pump 29.
[0033] During cutting, the recovery air pump 29 operates to suck the carbon dioxide gas passing through the part to be cut into the air guide chamber 27 through the rectangular grooves 25, and finally discharges it into the carbon dioxide gas recovery tank through the inside of the recovery air pump 29 via the recovery conduit 30, which also plays the role of preventing and reducing pollution and protecting the staff.
[0034] The outer walls of both sides of the cutting table 1 are fixedly connected with guard plates 31, and the two sides of the gantry 5 are respectively located inside the two guard plates 31. The outer walls of both sides of the cutting table 1 are fixedly connected with collection boxes 32. When cutting, a certain amount of waste residue will be generated. When cleaning the waste residue, the waste residue is pushed to the guard plate 31 on one side. The waste residue will fall into the collection box 32 due to the obstruction of the guard plate 31, which is convenient for subsequent centralized treatment of the waste residue.
[0035] Working principle: the part to be cut is placed on the cutting table 1, and then the adjusting motor 7 is operated to drive the adjusting screw 8 to rotate, so that the two sliders 9 move back to back, and the two sliders 9 respectively drive one end of the connecting rod 11 movably connected thereto to move together with the slider 9, and the other ends of the two connecting rods 11 push the U-shaped plate 13 and the lifting plate 12 to move downward, so that the protective cover 15 moves downward synchronously until the bottom of the protective cover 15 contacts the upper surface of the part to be cut, and the moving motor 3 is operated to drive the moving screw 4 to rotate, and the bottom of the gantry 5 moves in the moving groove 2, thereby moving the entire gantry 5 until the cutting head 14 moves to the edge of the part to be cut, and then the moving motor 3 stops running, and dry ice is introduced into the cutting head 14 through the dry ice guide tube 20, and the moving motor 3 is operated again to drive the gantry 5 to move, so that the cutting head 14 moves along the part to be cut. The upper surface of the cutting part is moved for cutting. Since the protective cover 15 is located outside the cutting head 14, when cutting, the cutting air pump 18 works, and the carbon dioxide gas generated when the cutting head 14 cuts is passed through the protective cover 15 and the air guide pipe 19, and the carbon dioxide gas is finally discharged into the carbon dioxide gas recovery tank through the exhaust pipe 21. When cutting, the recovery air pump 29 is running, and the carbon dioxide gas that passes through the cut part is sucked into the air guide bin 27 through the rectangular groove 25, and finally discharged into the carbon dioxide gas recovery tank through the recovery duct 30 through the inside of the recovery air pump 29, which also prevents pollution and protects the staff. When cutting, a certain amount of waste residue will be generated. When cleaning the waste residue, the waste residue is pushed to the guard plate 31 on one side. The waste residue will fall into the collection box 32 due to the obstruction of the guard plate 31, which is convenient for subsequent centralized treatment of the waste residue.
[0036] Finally, it should be noted that the above is only 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 can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A cutting device for supercritical carbon dioxide flow-carrying dry ice, comprising a cutting table (1), characterized in that: A moving groove (2) is formed inside the cutting table (1). A moving motor (3) is fixedly connected to the right outer wall of the cutting table (1). The output end of the moving motor (3) is fixedly connected to a moving lead screw (4). The other end of the moving lead screw (4) extends into the inside of the moving groove (2). A gantry (5) is threadedly connected to the outer wall of the moving lead screw (4). The bottom of the gantry (5) is located inside the moving groove (2). A sliding groove (6) is formed at the top of the gantry (5). An adjusting motor (7) is fixedly connected to the outer wall of the gantry (5). The output end of the adjusting motor (7) is fixedly connected to an adjusting lead screw (8). The other end of the adjusting lead screw (8) extends into the inside of the sliding groove (6). Sliders (9) are threadedly connected to the outer walls at both ends of the adjusting lead screw (8). Rotating grooves (10) are formed at the bottoms of the two sliders (9). A connecting rod (11) is movably connected to the inner wall of the rotating groove (10). A lifting plate (12) is arranged inside the gantry (5). U-shaped plates (13) are fixedly connected to both ends at the top of the lifting plate (12). The other ends of the two connecting rods (11) are respectively movably connected to the two U-shaped plates (13). A cutting head (14) is installed inside the lifting plate (12). A protective cover (15) is fixedly connected to the bottom of the lifting plate (12). An annular groove (16) is formed inside the protective cover (15). Air suction ports (17) are formed on the inner wall of the protective cover (15), and the number of the air suction ports (17) is multiple. The multiple air suction ports (17) are all communicated with the annular groove (16). A cutting air pump (18) is fixedly connected to the top of the gantry (5). The cutting air pump (18) is connected to the protective cover (15) through an air duct (19). A dry ice duct (20) is fixedly connected to the outer wall of the cutting head (14). An exhaust duct (21) is fixedly connected to the outer wall of the cutting air pump (18).
2. The cutting device for supercritical carbon dioxide flowing and carrying dry ice according to claim 1, characterized in that: Limiting grooves (22) are formed inside the inner wall of the gantry (5), and the number of the limiting grooves (22) is two. Limiting blocks (23) are fixedly connected to both outer walls of the lifting plate (12).
3. The cutting device for supercritical carbon dioxide fluid-carried dry ice according to claim 2, characterized in that: Springs (24) are fixedly connected to the tops of the two limiting blocks (23). The tops of the springs (24) are fixedly connected to the top inner walls of the limiting grooves (22).
4. The cutting device for supercritical carbon dioxide fluid-carried dry ice according to claim 1, wherein: Rectangular grooves (25) are formed at the top of the cutting table (1), and the number of the rectangular grooves (25) is multiple. Connecting grooves (26) are formed at the bottoms of the inner walls of the multiple rectangular grooves (25). An air guide chamber (27) is formed inside the cutting table (1). The multiple connecting grooves (26) are all communicated with the air guide chamber (27).
5. The cutting device for supercritical carbon dioxide flow-carrying dry ice according to claim 4, wherein: A support plate (28) is fixedly connected to the left outer wall of the cutting table (1). A recovery air pump (29) is fixedly connected to the top of the support plate (28). The air inlet of the recovery air pump (29) is communicated with the air guide chamber (27). A recovery duct (30) is fixedly connected to the outer wall of the recovery air pump (29).
6. The cutting device for supercritical carbon dioxide flow-carrying dry ice according to claim 1, characterized in that: Both outer walls on the two sides of the cutting table (1) are fixedly connected with guard plates (31). The two sides of the gantry (5) are respectively located inside the two guard plates (31). Both outer walls on the two sides of the cutting table (1) are fixedly connected with collection boxes (32).