A pre-pressing device for nuclear power ventilation filter cartridges

Abstract

The application discloses a novel pre-pressing device for a nuclear power ventilation filter core, which comprises a rack, a waste pre-pressing area arranged above the inside of the rack, horizontal pressing mechanisms arranged on both sides of the waste pre-pressing area of the rack, a horizontal pushing mechanism arranged on one side of the horizontal pressing mechanisms and staggered with the horizontal pressing mechanisms and used for pushing the waste into the waste pre-pressing area, a vertical downward pressing mechanism arranged above the waste pre-pressing area of the rack, an exhaust pipe arranged on the top of the rack and used for discharging radioactive substances in the waste pre-pressing area, a material receiving area arranged below the waste pre-pressing area of the rack and used for placing a steel barrel, a material falling opening arranged between the material receiving area and the waste pre-pressing area, a pull-out plate horizontally arranged on one side of the material falling opening and used for closing the material falling opening, a horizontal feeding mechanism arranged on one side of the waste pre-pressing area of the rack and used for pushing the waste to the waste pushing area, and a feeding position arranged on the lower part of the rack.

Description

Technical Field

[0001] This invention relates to the field of radioactive waste treatment technology, specifically to a pre-compression treatment device for nuclear power plant ventilation filter cartridges. Background Technology

[0002] Internationally, nuclear waste disposal typically involves land-based processing. This generally involves cooling and dry storage before burying the metal containers containing the waste deep within nuclear waste repositories built into thick layers of rock. Before burial, the nuclear waste needs to be compacted to reduce its volume for easier transport and centralized processing. Filter cartridges used in radioactive sites generally have dimensions of 610mm × 610mm × 292mm, which are relatively heavy and require compaction to reduce their volume.

[0003] Currently, the treatment of radioactive waste generated by nuclear facilities such as nuclear power plants, radioactive processing facilities, and research centers mainly focuses on reducing its volume and converting it into stable waste suitable for temporary storage or disposal. The primary method for reducing volume is to compress the steel drums containing the nuclear waste using an overcompressor (compactor). However, before the overcompressor operates, the nuclear waste filter cartridges are pre-compressed and loaded into the steel drums to prevent radioactive material dust from being released into the environment during compression. Therefore, there is an urgent need for a pre-compressing treatment device for nuclear power plant ventilation filter cartridges to address these issues. Summary of the Invention

[0004] The purpose of this invention is to provide a pre-compression treatment device for filter elements of nuclear power plant ventilation filters, so as to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pre-compression treatment device for a filter element of a nuclear power plant ventilation filter, comprising a frame, a waste pre-compression zone provided above the interior of the frame, horizontal pressing mechanisms provided on both sides of the waste pre-compression zone, and a horizontal pushing mechanism provided on the side of the frame offset from the horizontal pressing mechanisms to push the waste into the waste pre-compression zone, a vertical pressing mechanism provided above the waste pre-compression zone on the frame, and an exhaust pipe provided at the top of the frame for discharging radioactive materials in the waste pre-compression zone;

[0006] The frame is located below the scrap pre-compression zone and has a receiving area for placing steel buckets. A discharge port is set between the receiving area and the scrap pre-compression zone. A drawer plate for closing the discharge port is horizontally slidable on one side of the frame. A chain conveyor for conveying steel buckets to the receiving area is set on one side of the frame. A bucket-holding mechanism for aligning the steel buckets in the receiving area with the discharge port is set on the frame. A scrap pushing area is set between the scrap pre-compression zone and the horizontal pushing mechanism. A horizontal feeding mechanism for pushing scrap to the scrap pushing area is set on one side of the frame. A loading position for moving scrap to the space between the scrap pushing area and the horizontal feeding mechanism is set at the bottom of the frame.

[0007] Preferably, the frame is provided with a bucket lifting docking platform below the receiving area. The conveyor chains of the chain conveyor are symmetrically distributed on both sides of the bucket lifting docking platform. A lifting hydraulic cylinder is provided below the receiving area to drive the bucket lifting docking platform to rise and fall. The bucket holding mechanism includes a positioning plate fixed on the frame and a bucket holding plate symmetrically arranged on both sides of the positioning plate and hinged to the positioning plate. The bucket holding mechanism also includes bucket holding hydraulic cylinders symmetrically arranged on both sides of the frame. The cylinder bodies of the bucket holding hydraulic cylinders on both sides are hinged to the frame, and the output ends are hinged to the outer side of the bucket holding plate.

[0008] Preferably, the feeding position is provided with a first guide rail and a lifting plate. The top of the first guide rail extends between the horizontal feeding mechanism and the waste pushing area. The lifting plate is driven by a linear motor to slide up and down on the first guide rail. The horizontal feeding mechanism includes a second pushing plate and a second guide rail. The second pushing plate is driven by a linear motor to slide horizontally on the second guide rail. The horizontal pushing mechanism includes a pushing plate and a horizontal pushing hydraulic cylinder. The pushing plate is driven by the output end of the horizontal pushing hydraulic cylinder to slide towards or away from the waste pre-compression area within the waste pushing area.

[0009] Preferably, the vertical pressing mechanism includes a pressure plate and a vertical pressing hydraulic cylinder. The plate of the frame located above the waste pre-pressing zone has an opening for the pressure plate to slide into the waste pre-pressing zone. The opening is adapted to the shape of the pressure plate and is directly opposite the discharge port. The pressure plate is driven to slide up and down at the opening position by the output end of the vertical pressing hydraulic cylinder.

[0010] Preferably, the horizontal pressing mechanism includes an extrusion plate and a horizontal extrusion hydraulic cylinder. The extrusion plates on both sides are slidably disposed in the waste pre-compression zone by being pushed towards each other or away from each other by the output end of the horizontal extrusion hydraulic cylinder.

[0011] Preferably, the frame is provided with a sealing ring on the outside of the bottom opening of the material discharge port.

[0012] Preferably, the frame is provided with a steel barrel connecting mechanism at the bottom opening of the discharge port. The steel barrel connecting mechanism includes a base sleeve and an intermittent sliding sleeve. The bottom of the intermittent sliding sleeve is provided with a connecting structure for connecting the steel barrel. The base sleeve is fixed to the frame at the bottom opening of the discharge port. The bottom of the base sleeve is provided with an annular groove for the intermittent sliding sleeve to slide up and down. The outer wall of the intermittent sliding sleeve is provided with multiple sets of stepped grooves along the periphery. The horizontal depth of each stepped recess in the stepped groove gradually decreases from bottom to top. The base sleeve is provided with a locking block that slides radially along the intermittent sliding sleeve at the corresponding stepped groove. The base sleeve is also provided with a first driving member that drives the locking block to be inserted into the stepped groove radially along the intermittent sliding sleeve. The base sleeve is provided with a push block that drives the locking block to slide outward and lock into the stepped recess of the next step in the stepped groove. The intermittent sliding sleeve is provided with a second driving member that drives the push block to slide towards the discharge port opening.

[0013] Preferably, the top of the steel barrel is provided with an annular folded edge, and the bottom of the intermittent sliding sleeve is provided with a second annular groove into which the folded edge slides. Multiple sets of connecting structures are provided along the periphery of the intermittent sliding sleeve, and multiple sets of sliding grooves are provided along the periphery of the second annular groove. The connecting structure includes a locking plate that is slidably disposed in the sliding groove along the radial direction of the intermittent sliding sleeve. The bottom of the locking plate is provided with an inclined surface. A spring is provided in the intermittent sliding sleeve to drive the locking plate to slide into the second annular groove at the inclined surface. The bottom of the intermittent sliding sleeve is also provided with an unlocking component that drives the locking plate to disengage from the contact with the annular folded edge.

[0014] Preferably, a buffer section is provided between the lifting bucket docking platform and the output end of the lifting hydraulic cylinder.

[0015] Preferably, the buffer part includes a base, a turntable and a buffer spring. The top of the base is provided with a turntable groove for the turntable to rotate. The bottom of the lifting bucket docking platform is provided with a column. The top of the turntable is provided with a column groove for the column to slide up and down. The buffer spring is fixed to the bottom of the column groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention reduces the downward stroke of the top vertical pressing mechanism by pre-pressing the filter cartridge waste in the waste pre-pressing zone at the top of the frame.

[0018] By pre-compressing the filter cartridge waste in the waste pre-compressing zone, the horizontal perimeter of the waste pre-compressing zone is sealed by a horizontal pressing mechanism and a horizontal pushing mechanism, the top is sealed by a vertical pressing mechanism, and the bottom is sealed by a steel barrel and a sealing ring at the discharge port. This allows the powdery radioactive material generated by the pre-compressed filter cartridge waste to be discharged to a designated location through the exhaust pipe, thus protecting the environment where the operator is located.

[0019] A steel barrel connection structure is installed at the bottom of the discharge port. The steel barrel connection structure is connected by the intermittent sliding sleeve with the stepped groove and the locking block. When a filter element waste falls into the steel barrel, the steel barrel will drive the locking block to lock into the stepped recess of the upper stepped groove, so that the steel barrel falls in stages. This avoids the lifting hydraulic cylinder from being subjected to a large amount of rigid impact and damaging the hydraulic system when the steel barrel receives the filter element waste. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an illustrative diagram highlighting the location of filter waste and the steel barrel in the receiving area in this embodiment;

[0022] Figure 2 This is a schematic diagram of the overall structure of this embodiment;

[0023] Figure 3 This is an illustrative diagram highlighting the location of the waste pre-compression zone and the pressure plate in this embodiment;

[0024] Figure 4 This is an illustrative diagram highlighting the positions of the sealing ring and the pull plate in this embodiment;

[0025] Figure 5 This is a schematic diagram illustrating the waste pushing area in this embodiment;

[0026] Figure 6 This is an exploded view of the steel barrel connection mechanism highlighted in this embodiment;

[0027] Figure 7 This is an exploded view of the steel barrel connection mechanism from another perspective in this embodiment;

[0028] Figure 8 This is the embodiment. Figure 7 An enlarged schematic diagram of part A in the middle;

[0029] Figure 9 This is a schematic diagram highlighting the structure of the card plate and the annular folded edge in this embodiment;

[0030] Figure 10 This is a cross-sectional schematic diagram highlighting the steel barrel connection mechanism in this embodiment;

[0031] Figure 11 yes Figure 9 Enlarged schematic diagram of part B in the middle;

[0032] Figure 12 This is a cross-sectional view of another location of the steel barrel connection mechanism in this embodiment;

[0033] Figure 13 yes Figure 11 An enlarged schematic diagram of section C;

[0034] Figure 14 This is an exploded view of the buffer section in this embodiment.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Frame; 2. Scrap Pre-compression Zone; 3. Horizontal Pressing Mechanism; 301. Extrusion Plate; 302. Horizontal Extrusion Hydraulic Cylinder; 4. Horizontal Pushing Mechanism; 401. Horizontal Pushing Hydraulic Cylinder; 402. Pushing Plate; 5. Vertical Pressing Mechanism; 501. Pressure Plate; 502. Vertical Pressing Hydraulic Cylinder; 6. Exhaust Pipe; 7. Receiving Area; 8. Drop Port; 9. Drawer Plate; 10. Chain Conveyor; 11. Bucket Holding Mechanism; 111. Positioning Plate; 12. Bucket holding plate; 113. Bucket holding hydraulic cylinder; 12. Waste pushing area; 13. Horizontal feeding mechanism; 131. Second guide rail; 132. Second push plate; 14. Loading position; 15. Slide plate hydraulic cylinder; 16. Hydraulic pump station; 17. Electrical control cabinet; 18. Conveyor chain; 19. Bucket lifting docking platform; 20. Lifting hydraulic cylinder; 21. First guide rail; 22. Lifting plate; 23. Plate body; 24. Opening; 25. Sealing ring; 26. Steel barrel connecting mechanism; 261, base sleeve; 262, intermittent sliding sleeve; 27, annular groove; 28, stepped groove; 29, stepped recess; 30, locking block; 31, push block; 32, first groove; 33, first limiting part; 34, first compression spring; 35, sliding groove; 36, inclined part; 37, second groove; 38, second limiting part; 39, second compression spring; 40, limiting groove; 41, limiting block; 42, annular folded edge; 43. Second annular groove; 44. Slide groove; 45. Clamping plate; 46. Inclined surface; 47. Spring; 48. Unlocking component; 481. Annular plate; 482. T-ring; 483. Unlocking rod; 49. T-ring groove; 50. Locking rod groove; 51. Arc groove; 52. Buffer part; 521. Base; 522. Buffer spring; 523. Turntable; 53. Turntable groove; 54. Column; 55. Column groove; 56. Guide rod; 57. Spiral groove. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1-14 The present invention provides a technical solution: a pre-compression treatment device for a filter element of a nuclear power plant ventilation filter, comprising a frame 1, a waste pre-compression zone 2 provided above the interior of the frame 1, horizontal pressing mechanisms 3 provided on both sides of the waste pre-compression zone 2, and a horizontal pushing mechanism 4 provided on the side of the frame 1 offset from the horizontal pressing mechanism 3 to push the waste into the waste pre-compression zone 2, a vertical pressing mechanism 5 provided above the waste pre-compression zone 2 on the frame 1, and an exhaust pipe 6 provided at the top of the frame 1 for discharging radioactive materials in the waste pre-compression zone 2;

[0039] The frame 1 is located below the scrap pre-compression zone 2 and has a receiving area 7 for placing steel buckets. A discharge port 8 is provided between the receiving area 7 and the scrap pre-compression zone 2. The frame 1 is horizontally slidably provided with a drawer 9 for closing the discharge port 8 on one side. The frame 1 is provided with a chain conveyor 10 for conveying steel buckets to the receiving area 7 on one side. The frame 1 is provided with a bucket-holding mechanism 11 at the receiving area 7 to align the steel buckets in the receiving area 7 with the discharge port 8. A scrap pushing area 12 is provided between the scrap pre-compression zone 2 and the horizontal pushing mechanism 4. The frame 1 is provided with a horizontal feeding mechanism 13 on one side of the scrap pushing area 12 to push the scrap to the scrap pushing area 12. The lower part of the frame 1 is provided with a loading position 14 for moving the scrap to the space between the scrap pushing area 12 and the horizontal feeding mechanism 13.

[0040] As described above, when the filter element waste is reduced in volume and placed in the steel drum, the steel drum can first be transported to the receiving area 7 via the chain conveyor 10 to facilitate automatic up-and-down transport of the steel drum; then the filter element waste is placed at the loading position 14. After the filter element waste at the loading position 14 reaches the horizontal feeding mechanism 13, it is pushed to the waste pushing area 12 by the horizontal feeding mechanism 13, and then pushed to the waste pre-compression area 2 by the horizontal unloading mechanism. At this time, the draw plate 9 slides and blocks the discharge port 8. It should be noted that one end of the draw plate 9 is connected to the sliding plate hydraulic cylinder 15 and is connected to the sliding plate hydraulic cylinder 15. The output end of the plate hydraulic cylinder 15 slides by extending and retracting. After the filter element waste moves to the waste pre-compression zone 2, it is pre-compressed to the required size by the horizontal pressing mechanisms 3 on both sides. Then, the filter element waste is pressed down by the movement of the vertical pressing mechanism 5, so that the filter element waste falls into the steel barrel through the discharge port 8. It should be noted that the pre-compression treatment device is connected to the hydraulic pump station 16, which adopts a servo hydraulic system, to drive the hydraulic equipment used on the pre-compression treatment device. The pre-compression treatment device is also connected to the electrical control cabinet 17, which is used for the start, stop, safety protection and working status display of the pump group motor circuit of the hydraulic pump station 16.

[0041] Specifically, the frame 1 is provided with a bucket lifting docking platform 19 below the receiving area 7. The conveyor chains 18 of the chain conveyor 10 are symmetrically distributed on both sides of the bucket lifting docking platform 19. A lifting hydraulic cylinder 20 is provided below the receiving area 7 to drive the bucket lifting docking platform 19 to rise and fall. The bucket holding mechanism 11 includes a positioning plate 111 fixed on the frame 1 and a bucket holding plate 112 symmetrically arranged on both sides of the positioning plate 111 and hinged with the positioning plate 111. The bucket holding mechanism 11 also includes bucket holding hydraulic cylinders 113 symmetrically arranged on both sides of the frame 1. The cylinder bodies of the bucket holding hydraulic cylinders 113 on both sides are hinged with the frame 1, and the output ends are hinged with the outer side of the bucket holding plate 112.

[0042] As described above, the conveyor chain 18 is symmetrically distributed on both sides of the lifting docking platform 19. When the steel barrel is conveyed to the top of the lifting docking platform 19 by the chain conveyor 10, the conveying stops. The lifting docking platform 19 can be moved upward by the output end of the first hydraulic rod. After the steel barrel rises a certain distance, the output end of the barrel-holding hydraulic cylinder 113 is extended, so that the barrel-holding plates 112 on both sides rotate toward the side that is closer to each other to center the steel barrel. After the barrel-holding plates 112 on both sides hold the steel barrel tightly, the inner walls of the barrel-holding plates 112 and the positioning plate 111 are in contact with the steel barrel, so that the center of the steel barrel is located below the discharge port 8, so that the steel barrel is in a good receiving position.

[0043] Specifically, the feeding position 14 is provided with a first guide rail 21 and a lifting plate 22. The top of the first guide rail 21 extends between the horizontal feeding mechanism 13 and the waste pushing area 12. The lifting plate 22 is driven by a linear motor to slide up and down on the first guide rail 21. The horizontal feeding mechanism 13 includes a second pushing plate 132 and a second guide rail 131. The second pushing plate 132 is horizontally slidable on the second guide rail 131 by a linear motor. The horizontal pushing mechanism 4 includes a pushing plate 402 and a horizontal pushing hydraulic cylinder 401. The pushing plate 402 is driven by the output end of the horizontal pushing hydraulic cylinder 401 to slide towards or away from the waste pre-compression area 2 within the waste pushing area 12.

[0044] As can be seen from the above description: the waste material is fed from the loading position 14. The waste material is raised by the lifting plate 22 to the space between the second pushing plate 132 and the waste material pushing area, and is pushed to the waste material pushing area 12 by the second pushing plate 132. The extension of the output end of the third hydraulic rod can push the waste material in the waste material pushing area 12 into the waste material pre-compression area 2. It should be noted that the linear motors are respectively set at the bottom of the first guide rail 21 and on the side of the second guide rail 131 away from the waste material pushing area 12, which are not shown in the figure.

[0045] Specifically, the vertical pressing mechanism 5 includes a pressure plate 501 and a vertical pressing hydraulic cylinder 502. The plate 23 of the frame 1 located above the waste pre-pressing zone 2 has an opening 24 for the pressure plate 501 to slide into the waste pre-pressing zone 2. The opening 24 is shaped to match the pressure plate 501 and is directly opposite the discharge port 8. The pressure plate 501 is driven to slide up and down at the opening 24 position by the output end of the vertical pressing hydraulic cylinder 502.

[0046] As can be seen from the above description: when the horizontal pressing mechanism 3 squeezes the waste, the output end of the vertical pressing hydraulic cylinder 502 will first drive the pressing plate 501 to move to the position of the opening 24, so that the plate at the top of the waste pre-pressing area 2 is flat. When the horizontal pressing mechanism 3 squeezes the waste in the horizontal direction, it restricts the waste from deforming upward due to horizontal compression, and limits the height of the waste, so that the subsequent steel barrel can better hold a certain amount of waste. In this invention, one steel barrel is used to store two sets of waste. It should be noted that: after the waste is squeezed, the pressing plate 501 can be moved down first to push the waste from the discharge port 8 into the steel barrel. At this time, the opening 24 is in the open state. One end of the exhaust pipe 6 is connected to the blower, and the other end can be used to extract the radioactive material in the waste pre-pressing area 2 through the opening 24.

[0047] Specifically, the horizontal pressing mechanism 3 includes an extrusion plate 301 and a horizontal extrusion hydraulic cylinder 302. The two extrusion plates 301 are slidably disposed in the waste pre-compression zone 2 by being pushed by the output end of the horizontal extrusion hydraulic cylinder 302 toward the side that is closer to or further away from each other.

[0048] As described above, the waste material can be squeezed by the two extrusion plates 301. It should be noted that when the extrusion plates 301 are squeezing the waste material, the two sides of the extrusion plates 301 are respectively attached to the inner wall of one side of the waste material pre-compression zone 2 and the wall of the pusher plate 402. The upper and lower sides of the extrusion plates 301 are respectively attached to the adjacent end faces of the upper and lower plates of the waste material pre-compression zone 2. The extrusion plates 301 are set into different shapes according to the waste material squeezing requirements. In this application, after the two extrusion plates 301 move a certain stroke toward the adjacent side to squeeze the waste material, the extrusion plates 301, the frame 1 located on the inner wall of the waste material pre-compression zone 2, the pusher plate 402, and the upper and lower side plates 23 of the waste material pre-compression zone 2 form a mold cavity (i.e., the shape of the waste filter element after pre-compression, see [reference]). Figure 1 , Figure 1 The mold cavity in the figure is only for illustrative purposes to show the shape of filter element waste after pre-compression. It should be added that the shape of the mold cavity mainly depends on the extrusion plates 301 on both sides. The extrusion of the extrusion plates 301 in this application causes the filter element waste to form an octagonal column shape. However, during extrusion, the pre-compressed shape of the filter element waste is mainly used to match the storage space of the steel barrel or for the convenience of subsequent over-compression. The extrusion plates 301 are detachably fixed to the output end plate of the horizontal extrusion hydraulic cylinder 302 by countersunk bolts and can be replaced according to the pre-compression shape required by the actual filter element waste.

[0049] Specifically, the frame 1 is equipped with a sealing ring 25 on the outside of the bottom opening of the discharge port 8. When the lifting platform 19 rises, it will cause the top of the steel barrel to abut against the sealing ring 25, so that when the waste is squeezed in the waste pre-compression zone 2, a closed space can be formed, so that the radioactive substances generated during the waste compression will be discharged through the exhaust pipe 6.

[0050] As can be seen from the above description, when the filter element waste is pre-compressed in the waste pre-compressing zone 2, the bottom discharge port 8 is sealed by the top of the steel barrel, forming a better sealed space and better limiting the emission of radioactive substances to the outside.

[0051] Specifically, the frame 1 is equipped with a steel barrel connecting mechanism 26 at the bottom opening of the discharge port 8. The steel barrel connecting mechanism 26 includes a base sleeve 261 and an intermittent sliding sleeve 262. The bottom of the intermittent sliding sleeve 262 is provided with a connecting structure for connecting the steel barrel. The base sleeve 261 is fixed to the frame 1 at the bottom opening of the discharge port 8. The bottom of the base sleeve 261 is provided with an annular groove 27 for the intermittent sliding sleeve 262 to slide up and down. The outer wall of the intermittent sliding sleeve 262 is provided with multiple sets of stepped grooves 28 along the periphery. Each set of stepped grooves 28 from bottom to top... The horizontal depth of the stepped recess 29 gradually decreases. The base sleeve 261 is provided with a locking block 30 that slides radially along the intermittent sliding sleeve 262 at the corresponding step groove 28. The base sleeve 261 is also provided with a first driving member that drives the locking block 30 to slide radially into the step groove 28 along the intermittent sliding sleeve 262. The base sleeve 261 is provided with a push block 31 that drives the locking block 30 to slide outward and lock onto the step recess 29 on the step groove 28. The intermittent sliding sleeve 262 is provided with a second driving member that drives the push block 31 to slide toward the opening side of the discharge port 8.

[0052] As described above, when the steel barrel is connected to the intermittent sliding sleeve 262 and is ready to receive the first set of scrap, the intermittent sliding sleeve 262 is located at the top of the annular groove 27. At this time, the first driving component driving block 30 engages with a set of stepped recesses 29 at the bottom of the stepped groove 28 (multiple sets of stepped recesses 29 are provided in the stepped groove 28, the number of sets of scrap in a set of steel barrels is n, and the number of stepped recesses 29 in the stepped groove 28 is n+1 sets. In this application, a set of steel barrels holds two sets of scrap, and there are three sets of stepped recesses 29). The base sleeve 261 is provided with a mechanism for the locking block 30 to slide. The first groove 32 is movable, and a first limiting groove 40 is provided in the first groove 32. The locking block 30 is located in the first limiting groove 40 and is a columnar body. A first limiting part 33 is provided at the columnar body position to form a sliding connection with the first limiting groove 40. The first driving member includes a first compression spring 34 sleeved on the columnar body. At this time, the first compression spring 34 drives one end of the locking block 30 to be locked into the bottommost stepped recess 29, and makes the top end face of the locking block 30 abut against the top inner wall of the stepped recess 29, so that the intermittent sliding sleeve 262 is at the current height position under the action of gravity.

[0053] Each of the 29 stepped recesses (except the uppermost set of stepped recesses 29) is equipped with a push block 31. In the initial state, one end of the push block 31 passes through the intermittent sliding sleeve 262 and the inner wall of one side of the base sleeve 261 under the action of the second driving component and extends to below the discharge port 8. The base sleeve 261 is provided with a sliding groove 35 on one side of the annular groove 27, which allows the push block 31 to slide up and down. The top of the push block 31 is provided with an inclined part 36 below the discharge port 8. When the waste material is discharged from the discharge port... When the 8-section falls, it will abut against the inclined section 36 and drive the push block 31 to slide towards the locking block 30, causing the push block 31 to push the locking block 30 and drive the locking block 30 to disengage from the current stepped recess 29. When the locking block 30 disengages from the current stepped recess 29, the intermittent sliding sleeve 262 will move downward under the action of gravity, and cause the locking block 30 to abut against the top inner wall of the upward stepped recess 29, realizing a stage of downward movement of the steel barrel. It should be noted that: a set of stepped recesses 29 The height dimension is the height of the storage bucket in one stage of movement. To avoid the block 30 crossing multiple sets of stepped recesses 29 at once when the waste falls, the height dimension of the stepped recesses 29 can be adjusted adaptively (the height dimension of the stepped recesses 29 is greater than the height of the waste). It should be noted that: the intermittent sliding sleeve 262 is provided with a second groove 37 for the push block 31 to slide. The second groove 37 is provided with a second limiting groove 40. The push block 31 is a columnar body located in the second groove 37, and a second limiting part is provided on the columnar body to form a sliding connection with the second limiting groove 40. The second driving member is a second compression spring 39 sleeved on the columnar body of the push block 31. In the initial state, the second compression spring 39 drives the push block 31 to have an inclined part 36 located below the discharge port 8, and the other end face of the push block 31 is not in the stepped recesses 29, so as to avoid affecting the block 30 to be stuck in the stepped recesses 29.

[0054] It should be noted that: a limiting groove 40 is provided in the annular groove 27, and multiple sets of limiting blocks 41 are provided on the periphery of the top of the intermittent sliding sleeve 262. The limiting blocks 41 are slidably disposed in the limiting groove 40 and will not detach from the base sleeve 261 when the intermittent sliding sleeve 262 slides.

[0055] Specifically, the top of the steel barrel is provided with an annular folded edge 42, and the bottom of the intermittent sliding sleeve 262 is provided with a second annular groove 43 for the folded edge to slide into. Multiple sets of connecting structures are provided along the periphery of the intermittent sliding sleeve 262, and multiple sets of sliding grooves 44 are provided along the periphery of the second annular groove 43. The connecting structure includes a locking plate 45 that is radially slidably disposed in the sliding groove 44 along the intermittent sliding sleeve 262. The bottom of the locking plate 45 is provided with an inclined surface 46. The intermittent sliding sleeve 262 is provided with a spring 47 that drives the locking plate 45 to slide into the second annular groove 43 at the inclined surface 46. The bottom of the intermittent sliding sleeve 262 is also provided with an unlocking member 48 that drives the locking plate 45 to disengage from the abutment of the annular folded edge 42.

[0056] As described above, the steel drum rises through the lifting docking platform 19 and is inserted into the second annular groove 43. The annular folded edge 42 of the steel drum abuts against the inclined surface 46 of the clamping plate 45 until the top of the clamping plate 45 is engaged with the bottom of the annular folded edge 42, thereby fixing the steel drum onto the intermittent sliding sleeve 262. It should be noted that the bottom of the intermittent sliding sleeve 262 is provided with a third annular groove 27 outside the second annular groove 43. The unlocking component 48 includes an annular plate 481 rotatably disposed in the third annular groove 27. A T-shaped ring 482 is provided on the periphery. The inner wall of the third annular groove 27 is provided with a T-shaped ring groove 49 for the T-shaped ring 482 to rotate. The top of the annular plate 481 is provided with an unlocking rod 483 corresponding to each set of locking plates 45. The locking plate 45 and the unlocking rod 483 are provided with an arc groove 51. The bottom of the intermittent sliding sleeve 262 is provided with a locking rod groove 50 for the unlocking rod 483 to slide. The unlocking rod 483 extends into the sliding groove 44 through the locking rod groove 50 and cooperates with the arc groove 51 to drive the locking plate 45 to disengage from the annular folded edge 42.

[0057] Specifically, a buffer section 52 is connected between the lifting docking platform 19 and the output end of the lifting hydraulic cylinder 20.

[0058] As can be seen from the above description, when the steel barrel descends in a stage through the cooperation of the locking block 30 and the stepped recess 29, it can provide support and cushioning.

[0059] Specifically, the buffer part 52 includes a base 521, a turntable 523 and a buffer spring 522. The top of the base 521 is provided with a turntable groove 53 for the turntable 523 to rotate. The bottom of the lifting bucket docking platform 19 is provided with a column 54. The top of the turntable 523 is provided with a column groove 55 for the column 54 to slide up and down. The buffer spring 522 is fixed to the bottom of the column groove 55.

[0060] As described above, when a set of scrap materials falls into the steel drum, the steel drum will move downwards. This downward movement will cause the lifting docking platform 19 to move downwards, and the buffer spring 522 will provide a buffer for the steel drum. It should be noted that the outer wall of the column 54 is provided with a guide rod 56, and the inner wall of the column groove 55 is provided with a spiral groove 57 for the guide rod 56 to rotate. When the lifting docking platform 19 moves downwards, the guide rod 56 will slide in the spiral groove 57 and rotate in the turntable groove 53, thus achieving a buffering step. The smaller the pitch of the spiral groove 57 (the smaller the inclination), the slower the steel drum will move downwards. Different buffering effects can be obtained by setting different pitches of the spiral groove 57. Before the steel drum enters the receiving area 7, the top of the lifting docking platform 19 is lower than the top of the conveyor chain 18.

[0061] Please see Figure 1-5 As shown: Embodiment 1 of the present invention is as follows:

[0062] A pre-compression treatment device for a filter element of a nuclear power plant ventilation filter includes a frame 1. A waste pre-compression zone 2 is provided at the top inside the frame 1. Horizontal pressing mechanisms 3 are provided on both sides of the waste pre-compression zone 2, and a horizontal pushing mechanism 4 is provided on the side of the frame 1 that is offset from the horizontal pressing mechanism 3 to push the waste into the waste pre-compression zone 2. A vertical pressing mechanism 5 is provided above the waste pre-compression zone 2 on the frame 1. An exhaust pipe 6 is provided at the top of the frame 1 for discharging radioactive materials in the waste pre-compression zone 2.

[0063] The frame 1 is located below the scrap pre-compression zone 2 and has a receiving area 7 for placing steel buckets. A discharge port 8 is provided between the receiving area 7 and the scrap pre-compression zone 2. The frame 1 is horizontally slidably provided with a drawer 9 for closing the discharge port 8 on one side. The frame 1 is provided with a chain conveyor 10 for conveying steel buckets to the receiving area 7 on one side. The frame 1 is provided with a bucket-holding mechanism 11 at the receiving area 7 to align the steel buckets in the receiving area 7 with the discharge port 8. A scrap pushing area 12 is provided between the scrap pre-compression zone 2 and the horizontal pushing mechanism 4. The frame 1 is provided with a horizontal feeding mechanism 13 on one side of the scrap pushing area 12 to push the scrap to the scrap pushing area 12. The lower part of the frame 1 is provided with a loading position 14 for moving the scrap to the space between the scrap pushing area 12 and the horizontal feeding mechanism 13.

[0064] The frame 1 is located below the receiving area 7 and has a bucket lifting docking platform 19. The conveyor chains 18 of the chain conveyor 10 are symmetrically distributed on both sides of the bucket lifting docking platform 19. The receiving area 7 is provided with a lifting hydraulic cylinder 20 to drive the bucket lifting docking platform 19 to rise and fall. The bucket holding mechanism 11 includes a positioning plate 111 fixed on the frame 1 and a bucket holding plate 112 symmetrically arranged on both sides of the positioning plate 111 and hinged with the positioning plate 111. The bucket holding mechanism 11 also includes bucket holding hydraulic cylinders 113 symmetrically arranged on both sides of the frame 1. The cylinder bodies of the bucket holding hydraulic cylinders 113 on both sides are hinged with the frame 1 and the output ends are hinged with the outside of the bucket holding plate 112.

[0065] The frame 1 is located on the outside of the bottom opening of the material discharge port 8 and is equipped with a sealing ring 25.

[0066] The feeding position 14 is provided with a first guide rail 21 and a lifting plate 22. The top of the first guide rail 21 extends between the horizontal feeding mechanism 13 and the waste pushing area 12. The lifting plate 22 is driven by a linear motor to slide up and down on the first guide rail 21. The horizontal feeding mechanism 13 includes a second pushing plate 132 and a second guide rail 131. The second pushing plate 132 is driven by a linear motor to slide horizontally on the second guide rail 131. The horizontal pushing mechanism 4 includes a pushing plate 402 and a horizontal pushing hydraulic cylinder 401. The pushing plate 402 is driven by the output end of the horizontal pushing hydraulic cylinder 401 to slide towards or away from the waste pre-compression area 2 within the waste pushing area 12.

[0067] The vertical pressing mechanism 5 includes a pressure plate 501 and a vertical pressing hydraulic cylinder 502. The plate 23 of the frame 1 located above the waste pre-pressing zone 2 has an opening 24 for the pressure plate 501 to slide into the waste pre-pressing zone 2. The opening 24 is shaped to match the pressure plate 501 and is directly opposite the discharge port 8. The pressure plate 501 is driven to slide up and down at the opening 24 position by the output end of the vertical pressing hydraulic cylinder 502.

[0068] The horizontal pressing mechanism 3 includes an extrusion plate 301 and a horizontal extrusion hydraulic cylinder 302. The two extrusion plates 301 are slidably disposed in the waste pre-compression zone 2 by being pushed by the output end of the horizontal extrusion hydraulic cylinder 302 toward one side closer to the other or further away from the other.

[0069] In this embodiment, the pre-compression process of filter cartridge waste is as follows: First, the steel barrel is placed on the chain conveyor 10. After the steel barrel is conveyed to the receiving area 7 by the chain conveyor 10, the lifting docking platform 19 is raised a certain distance by the first hydraulic rod. Then, the barrel holding plate 112 is rotated by the second hydraulic rod to center the steel barrel once. Then, the barrel holding plate 112 is released. The lifting docking platform 19 is raised again by the lifting hydraulic cylinder 20 and the top of the steel barrel is brought into contact with the bottom of the sealing ring 25. The barrel holding hydraulic cylinder 113 is used to drive the barrel holding plate 112 to hold the steel barrel tightly, so that the steel barrel is in the receiving position.

[0070] The filter element waste is placed on the lifting plate 22 of the loading position 14. The lifting plate 22 is driven by a linear motor to rise on the first guide rail 21 to the second push plate 132. Then, another linear motor drives the second push plate 132 to slide on the second guide rail 131, pushing the filter element waste to the waste pushing area 12. The horizontal pushing hydraulic cylinder 401 drives the push plate 402 to move and push the filter element waste into the waste pre-compression area 2. The vertical pressing hydraulic cylinder 502 is activated to move the pressure plate 501 down to the opening 24 at the top of the waste pre-compression area 2. At the same time, the sliding plate hydraulic cylinder 15 is activated to make the drawing plate 9 slide and block the discharge port 8. Then, the horizontal extrusion hydraulic cylinder 302 is activated to drive the two extrusion plates on both sides to move towards each other to extrude the filter element waste.

[0071] After the filter element waste is squeezed, the extrusion plate is driven to detach from the filter element waste by the horizontal extrusion hydraulic cylinder 302. At the same time, the slide hydraulic cylinder 15 drives the drawing plate 9 to move and open the discharge port 8. The vertical pressing hydraulic cylinder 502 drives the pressing plate 501 to move down and press the filter element waste from the discharge port 8 into the steel barrel. At this time, the blower can extract the radioactive material in the waste pre-compression zone 2 from the opening 24 through the exhaust pipe.

[0072] After a set of filter cartridge waste falls into the steel barrel, the interface will repeat the above process to transport the next filter cartridge waste to the waste pre-compression zone 2 for pre-compression. Before the next waste enters the waste pre-compression zone 2, the extrusion plate 301, pressure plate 501, etc. need to be reset. It should be noted that "the top of the steel barrel in this embodiment is corrugated, which is to facilitate the overpressure machine to perform overpressure after the steel barrel is filled with filter cartridge waste".

[0073] Please see Figure 1-14 As shown: Embodiment 2 of the present invention is as follows:

[0074] The difference between this embodiment and embodiment one is that the sealing ring 25 is replaced with a storage bucket connecting mechanism, and a buffer part 52 is added to realize the phased drop of the steel bucket after receiving the waste material, so as to avoid the filter element waste falling directly in embodiment one and causing rigid impact on the lifting hydraulic cylinder 20 and damaging the hydraulic system (when the steel bucket in embodiment one receives the filter element waste material, the bucket holding mechanism 11 also needs to continuously hold the steel bucket tightly to avoid the steel bucket swaying when receiving the material. After long-term use, the bucket holding mechanism 11 is also subject to long-term impact, resulting in centering error).

[0075] A steel barrel connecting mechanism 26 is provided at the bottom opening of the discharge port 8 on the frame 1. The steel barrel connecting mechanism 26 includes a base sleeve 261 and an intermittent sliding sleeve 262. The base sleeve 261 is fixed to the frame 1 at the bottom opening of the discharge port 8 by multiple sets of bolts. The bottom of the intermittent sliding sleeve 262 is provided with a connecting structure for connecting the steel barrel. The base sleeve 261 is fixed to the frame 1 at the bottom opening of the discharge port 8. The bottom of the base sleeve 261 is provided with an annular groove 27 for the intermittent sliding sleeve 262 to slide up and down. The outer wall of the intermittent sliding sleeve 262 is provided with multiple sets of stepped grooves along the periphery. 28. The stepped groove 28 gradually becomes shallower in horizontal depth from bottom to top in each stepped recess 29. The base sleeve 261 is provided with a locking block 30 that slides radially along the intermittent sliding sleeve 262 at the corresponding position of the stepped groove 28. The base sleeve 261 is also provided with a first driving member that drives the locking block 30 to slide radially into the stepped groove 28 along the intermittent sliding sleeve 262. The base sleeve 261 is provided with a push block 31 in the stepped groove 28 where the driving locking block 30 slides outward and locks into the next stepped recess 29 of the stepped groove 28. The intermittent sliding sleeve 262 is provided with a second driving member that drives the push block 31 to slide toward the opening side of the discharge port 8.

[0076] The top of the steel barrel is provided with an annular folded edge 42, and the bottom of the intermittent sliding sleeve 262 is provided with a second annular groove 43 for the folded edge to slide into. Multiple sets of connecting structures are provided along the periphery of the intermittent sliding sleeve 262, and multiple sets of sliding grooves 44 are provided around the periphery of the second annular groove 43. The connecting structure includes a locking plate 45 that is radially slidably disposed in the sliding groove 44 along the intermittent sliding sleeve 262. The bottom of the locking plate 45 is provided with an inclined surface 46. The intermittent sliding sleeve 262 is provided with a spring 47 that drives the locking plate 45 to slide into the second annular groove 43 at the inclined surface 46. The bottom of the intermittent sliding sleeve 262 is also provided with an unlocking member 48 that drives the locking plate 45 to disengage from the abutment of the annular folded edge 42.

[0077] A buffer section 52 is provided between the lifting docking platform 19 and the output end of the lifting hydraulic cylinder 20.

[0078] The buffer section 52 includes a base 521, a turntable 523 and a buffer spring 522. The top of the base 521 is provided with a turntable groove 53 for the turntable 523 to rotate. The bottom of the lifting bucket docking platform 19 is provided with a column 54. The top of the turntable 523 is provided with a column groove 55 for the column 54 to slide up and down. The buffer spring 522 is fixed to the bottom of the column groove 55.

[0079] One implementation process of this embodiment is as follows: When the steel drum is conveyed to the lifting docking platform 19 by the chain conveyor 10, the lifting docking platform 19 is raised by the lifting hydraulic cylinder 20 by one end distance, and the drum holding mechanism 11 is used for one centering. After the steel drum is centered directly below the discharge port 8, the drum holding mechanism 11 can release the steel drum and continue to drive the steel drum to rise, so that the annular folded edge 42 at the top of the steel drum is inserted into the second annular groove 43. During the process of the annular folded edge 42 rising, the top of the annular folded edge 42 will abut against the inclined surface 46 of the clamping plate 45 and drive the clamping plate 45 to move radially outward along the intermittent sliding sleeve 262. When the annular folded edge 42 continues to rise and the clamping plate 45 is opposite to the lower part of the annular folded edge 42, the spring 47 will push the clamping plate 45 to slide below the annular folded edge 42, so that the intermittent sliding sleeve 262 and the steel drum are connected.

[0080] The steel bucket continues to rise, causing the intermittent sliding sleeve 262 to move upward within the annular groove 27 until it reaches the top of the annular groove 27 (this also shortens the path of the filter element waste falling into the steel bucket and reduces the impact of the filter element waste falling). At this point, the locking block 30, under the action of the first compression spring 34, will engage with the bottom stepped recess 29 in the stepped groove 28, fixing the intermittent sliding sleeve 262 at its current height. Then, the lifting docking platform 19 is driven to move downward, allowing the lifting docking platform to engage. The distance between the bottom end face of platform 19 and the top end face of base 521 is the same as the distance that intermittent sliding sleeve 262 can slide down in annular groove 27. This ensures that after the steel barrel is filled with multiple sets of filter element waste, intermittent sliding sleeve 262 moves to the bottom of the allowable sliding stroke in annular groove 27. At the same time, the lifting docking platform 19 moves down to a position that fits against base 521. The cooperation between the two ensures that after the filter element waste falls into the steel barrel, the impact on the output end of lifting hydraulic cylinder 20 is minimized, effectively protecting the hydraulic system.

[0081] After the intermittent sliding sleeve 262 moves to the top of the annular groove 27, when the first filter element waste falls into the steel barrel through the discharge port 8, the filter element waste will abut against the inclined part 36 of the push block 31 and drive the push block 31 to slide into the stepped groove 28, thus pushing the push block 31 out of the current stepped recess 29 in the stepped groove 28. Under the action of the weight of the steel barrel, the intermittent sliding sleeve 262 will sink down one stroke. Under the action of the first compression spring 34, the locking block 30 will be driven to engage with the previous stepped recess 29. At the same time, during the descent of the steel barrel in one stroke, the lifting docking platform 19 will be driven down. The descent of the lifting docking platform 19 will drive the column 54 to move down in the turntable groove 53 and compress the spring 47. The guide rod 56 on the outer wall of the column 54 will slide in the spiral groove 57 and drive the turntable 523 to rotate, which can reduce the speed of the steel barrel falling and produce a buffering effect.

[0082] After the locking block 30 is engaged with the top stepped recess 29 of the stepped groove 28 in the above manner, the steel barrel has completed the loading of multiple sets of filter element waste. At this time, the lifting docking platform 19 moves down to a position that fits against the base 521. By rotating the annular plate 481, the rotation of the annular plate 481 will drive the unlocking rod 483 to move in the arc groove 51 of the locking plate 45, thereby driving the locking plate 45 to move radially outward towards the intermittent sliding sleeve 262, so that the locking plate 45 is disengaged from the annular side of the steel barrel. At this time, the lifting hydraulic cylinder 20 can be used to drive the steel barrel to continue to descend until the top of the lifting docking platform 19 is below the conveyor chain 18, and the steel barrel can be moved out by the two-type conveyor. It should be noted that the top of the steel barrel in this embodiment is corrugated in the same way as the steel barrel in the first embodiment. The difference is that the top of the steel barrel in this embodiment is provided with a folded edge 42.

[0083] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0084] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-compression treatment device for filter cartridges used in nuclear power plant ventilation filters, characterized in that: Includes a frame (1), a waste pre-compression zone (2) is provided above the inside of the frame (1), a horizontal pressing mechanism (3) is provided on both sides of the waste pre-compression zone (2) of the frame (1), and a horizontal pushing mechanism (4) is provided on the side opposite to the horizontal pressing mechanism (3) to push the waste into the waste pre-compression zone (2), a vertical pressing mechanism (5) is provided above the waste pre-compression zone (2) of the frame (1), and an exhaust pipe (6) is provided at the top of the frame (1) for discharging the radioactive material in the waste pre-compression zone (2); The frame (1) is located below the scrap pre-compression zone (2) and has a receiving area (7) for placing steel buckets. A discharge port (8) is provided between the receiving area (7) and the scrap pre-compression zone (2). The frame (1) is horizontally slidably provided with a drawer (9) for closing the discharge port (8) on one side. The frame (1) is provided with a chain conveyor (10) for conveying steel buckets to the receiving area (7) on one side. The frame (1) is provided with a drive mechanism at the receiving area (7). A clamping mechanism (11) aligns the steel bucket in the receiving area (7) with the discharge port (8). A waste pushing area (12) is provided between the waste pre-compression area (2) and the horizontal pushing mechanism (4). A horizontal feeding mechanism (13) is provided on one side of the frame (1) to push the waste to the waste pushing area (12). A loading position (14) is provided at the lower part of the frame (1) to move the waste to the loading position (14) between the waste pushing area (12) and the horizontal feeding mechanism (13). The frame (1) is provided with a steel barrel connecting mechanism (26) at the bottom opening of the discharge port (8). The steel barrel connecting mechanism (26) includes a base sleeve (261) and an intermittent sliding sleeve (262). The bottom of the intermittent sliding sleeve (262) is provided with a connecting structure for connecting the steel barrel. The base sleeve (261) is fixed on the frame (1) at the bottom opening of the discharge port (8). The bottom of the base sleeve (261) is provided with an annular groove (27) for the intermittent sliding sleeve (262) to slide up and down. The outer wall of the intermittent sliding sleeve (262) is provided with multiple sets of stepped grooves (28) in a stepped shape along the periphery. Each of the stepped grooves (28) from bottom to top The horizontal depth of the stepped recess (29) gradually becomes shallower. The base sleeve (261) is provided with a locking block (30) that slides radially along the intermittent sliding sleeve (262) at the corresponding stepped groove (28). The base sleeve (261) is also provided with a first driving member that drives the locking block (30) to be inserted radially into the stepped groove (28) along the intermittent sliding sleeve (262). The base sleeve (261) is provided with a push block (31) that drives the locking block (30) to slide outward and lock onto the upper stepped recess (29) of the stepped groove (28) in the stepped groove (28). The intermittent sliding sleeve (262) is provided with a second driving member that drives the push block (31) to slide toward the opening side of the discharge port (8).

2. The pre-compression treatment device for a nuclear power plant ventilation filter element according to claim 1, characterized in that: The frame (1) is located below the receiving area (7) and has a bucket lifting docking platform (19). The conveying chains (18) of the chain conveyor (10) are symmetrically distributed on both sides of the bucket lifting docking platform (19). The receiving area (7) is provided with a lifting hydraulic cylinder (20) to drive the bucket lifting docking platform (19) to rise and fall. The bucket holding mechanism (11) includes a positioning plate (111) fixed on the frame (1) and a bucket holding plate (112) symmetrically arranged on both sides of the positioning plate (111) and hinged with the positioning plate (111). The bucket holding mechanism (11) also includes bucket holding hydraulic cylinders (113) symmetrically arranged on both sides of the frame (1). The cylinder bodies of the bucket holding hydraulic cylinders (113) on both sides are hinged with the frame (1) and the output end is hinged with the outside of the bucket holding plate (112).

3. The pre-compression treatment device for a nuclear power plant ventilation filter element according to claim 1, characterized in that: The feeding position (14) is provided with a first guide rail (21) and a lifting plate (22). The top of the first guide rail (21) extends between the horizontal feeding mechanism (13) and the waste pushing area (12). The lifting plate (22) is driven by a linear motor to slide up and down on the first guide rail (21). The horizontal feeding mechanism (13) includes a second pusher plate (132) and a second guide rail (131). The second pusher plate (132) is driven by a linear motor to slide horizontally on the second guide rail (131). The horizontal pushing mechanism (4) includes a pusher plate (402) and a horizontal pushing hydraulic cylinder (401). The pusher plate (402) is driven by the output end of the horizontal pushing hydraulic cylinder (401) to slide towards or away from the waste pre-compression area (2) in the waste pushing area (12).

4. A pre-compression treatment device for a nuclear power plant ventilation filter element according to claim 1, characterized in that: The vertical pressing mechanism (5) includes a pressure plate (501) and a vertical pressing hydraulic cylinder (502). The frame (1) has a plate (23) above the waste pre-pressing area (2) with an opening (24) for the pressure plate (501) to slide into the waste pre-pressing area (2). The opening (24) is adapted to the shape of the pressure plate (501) and is directly opposite to the discharge port (8). The pressure plate (501) is driven to slide up and down at the opening (24) position by the output end of the vertical pressing hydraulic cylinder (502).

5. A pre-compression treatment device for a nuclear power plant ventilation filter element according to claim 1, characterized in that: The horizontal pressing mechanism (3) includes an extrusion plate (301) and a horizontal extrusion hydraulic cylinder (302). The extrusion plates (301) on both sides are slidably disposed in the waste pre-pressing zone (2) by being pushed by the output end of the horizontal extrusion hydraulic cylinder (302) towards each other or away from each other.

6. A pre-compression treatment device for a nuclear power plant ventilation filter element according to claim 2, characterized in that: The frame (1) is provided with a sealing ring (25) on the outside of the bottom opening of the material discharge port (8).

7. A pre-compression treatment device for a nuclear power plant ventilation filter element according to claim 2, characterized in that: The top of the steel barrel is provided with an annular folded edge (42), and the bottom of the intermittent sliding sleeve (262) is provided with a second annular groove (43) for the folded edge to slide into. Multiple sets of connecting structures are provided along the periphery of the intermittent sliding sleeve (262), and multiple sets of sliding grooves (44) are provided along the periphery of the second annular groove (43). The connecting structure includes a card plate (45) that is slidably disposed in the sliding groove (44) along the radial direction of the intermittent sliding sleeve (262). The bottom of the card plate (45) is provided with an inclined surface (46). The intermittent sliding sleeve (262) is provided with a spring (47) that drives the card plate (45) to slide into the second annular groove (43) at the inclined surface (46). The bottom of the intermittent sliding sleeve (262) is also provided with an unlocking member (48) that drives the card plate (45) to disengage from the contact with the annular folded edge (42).

8. A pre-compression treatment device for a nuclear power plant ventilation filter element according to claim 7, characterized in that: A buffer section (52) is connected between the lifting dock (19) and the output end of the lifting hydraulic cylinder (20).

9. A pre-compression treatment device for a nuclear power plant ventilation filter element according to claim 8, characterized in that: The buffer section (52) includes a base (521), a turntable (523) and a buffer spring (522). The base (521) has a turntable groove (53) at the top for the turntable (523) to rotate. The bottom of the bucket lifting dock (19) has a column (54). The top of the turntable (523) has a column groove (55) for the column (54) to slide up and down. The buffer spring (522) is fixed to the bottom of the column groove (55).

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