High-reliability spinning type sealing structure for spent fuel transportation container

Abstract

The utility model discloses a high-reliability spinning type sealing structure for a spent fuel transportation container, and relates to the technical field of mechanical sealing, the high-reliability spinning type sealing structure comprises a rotary locking plate, an adjusting pad, a sealing ring and a bottom fixing plate at the lower part of the sealing ring, the lower part of the rotary locking plate is clamped with a barrel, and the barrel is provided with a locking groove; a supporting plate is arranged at the bottom of the rotary locking plate, a rotary table is arranged in the supporting plate in a sliding mode, a rotary telescopic mechanism is arranged on the lower portion of the rotary table, the rotary telescopic mechanism comprises a rotary disc rotationally arranged on the lower portion of the supporting plate, a sliding groove is formed in the lower portion of the rotary disc, and a moving block is arranged in the sliding groove in a sliding mode; a push-pull rod is fixedly arranged on one side of the moving block, an arc-shaped plate capable of forming a circle is fixedly arranged on one side of the push-pull rod, and the arc-shaped plate is sleeved with a rubber ring. The problems that under different use working conditions, appropriate sealing pieces cannot be selected or sealing effects with different requirements can be achieved through pre-tightening of specific fasteners, and replacement is inconvenient are solved.

Description

Technical Field

[0001] The present application relates to the field of mechanical seal technology, and particularly to a spinning seal structure for high reliability of spent fuel transportation containers. Background Art

[0002] The fuel assemblies of VVER nuclear power plants are hexagonal fuel assemblies. Nuclear power plants generally use metal sealed containers to store fuel assemblies for a long time, including damaged fuel assemblies. One fuel assembly requires the use and long-term occupation of a metal sealed container, and the structure needs to meet requirements such as seismic resistance and thermal engineering.

[0003] For example, in the metal sealed container for storing fuel assemblies with the application number CN114267471A, the following deficiencies still exist when the device is in use:

[0004] The above patent seals by sleeving a pressure ring and a seal on the lower part of the outer wall of the plug cover body in sequence from top to bottom. However, under different working conditions, it is not possible to select a suitable seal according to the actual use situation, and it cannot be used under working conditions where fasteners are not available for fixing, unable to achieve an effective sealing effect. Moreover, the seal is easily cracked or aged quickly due to long-term extrusion, thus affecting the sealing effect. And when replacing, it is necessary to first close or discharge the harmful gas in the cylinder and then replace it, which is time-consuming and laborious. Summary of the Invention

[0005] In order to improve the problems that a suitable seal cannot be selected under different working conditions, or different requirements of sealing effects cannot be achieved by pre-tightening with specific fasteners, and the replacement is not convenient, the present application provides a spinning seal structure for high reliability of spent fuel transportation containers.

[0006] A spinning seal structure for high reliability of spent fuel transportation containers provided by the present application adopts the following technical solutions:

[0007] A spinning seal structure for high reliability of spent fuel transportation containers includes a rotating locking plate and an adjusting pad sleeved on the outer surface of the lower part of the rotating locking plate. A sealing ring is abutted and arranged below the adjusting pad, and a bottom fixing plate threadedly connected to the rotating locking plate is abutted and arranged below the sealing ring. A cylinder body is clamped and arranged below the rotating locking plate. Three locking grooves are spaced and circumferentially opened on the upper part of the cylinder body, and the three locking grooves are mutually clamped with three locking pins spaced and circumferentially fixed on the outer ring of the upper part of the rotating locking plate. A support plate is arranged at the bottom of the rotating locking plate, a rotating table is slidably arranged inside the support plate, and a rotating telescopic mechanism is arranged below the rotating table.

[0008] The rotary telescopic mechanism includes a turntable rotatably arranged at the lower part of the support plate. A plurality of chutes with the same structure and installation method are arranged around the lower part of the turntable. A moving block is slidably arranged inside each of the plurality of chutes. A push rod is fixedly arranged on one side of each of the plurality of moving blocks. An arc plate that can form a circle is fixedly arranged on the side of each of the plurality of push rods away from the moving block. A deformable rubber ring is sleeved outside the plurality of arc plates.

[0009] By adopting the above technical solution, the adjustment pad can adjust the installation position of the sealing ring. The bottom fixing plate bears the functions of support and limitation. The locking pin and the locking groove are responsible for clamping and fixing the rotary locking plate and the cylinder body. The support plate is responsible for fixing the chute, so that the moving block and the arc plate can be opened outward and retracted inward. The rotating table is responsible for driving the turntable to rotate, so that the moving block has the power to push the push rod, the arc plate and the rubber ring to open and close.

[0010] Preferably, the rotary telescopic mechanism further includes a plurality of arc grooves spaced around and opened on the turntable. A small cylinder fixedly connected to the plurality of moving blocks is slidably arranged inside each of the plurality of arc grooves.

[0011] By adopting the above technical solution, the cooperation between the arc groove and the small cylinder can realize the oblique movement and can drive the moving block to move outward.

[0012] Preferably, a rotating shaft with its lower part fixedly connected to the middle part of the turntable is fixedly arranged through the middle part of the rotating table.

[0013] By adopting the above technical solution, the rotating shaft can transmit power and can unify the rotation actions of the upper and lower parts.

[0014] Preferably, three abutting blocks are spaced around the outer ring of the rotating table. A U-shaped snap ring is snap-connected to the outside of each of the three abutting blocks.

[0015] By adopting the above technical solution, the cooperation between the abutting block and the U-shaped snap ring can realize the reciprocating movement of the rotating table and can also not affect the separation between the rotating table and the rotary locking plate.

[0016] Preferably, an outer ring plate is fixedly arranged in the middle of the support plate. Three telescopic grooves are spaced around and opened on the inner wall of the outer ring plate. A limiting column is slidably arranged inside each of the three telescopic grooves.

[0017] By adopting the above technical solution, the telescopic groove can provide a supporting force when the limiting column is clamped with the limiting groove and can provide space when the limiting column is separated from the limiting groove. And setting a spring between the telescopic groove and the limiting column can help with abutting and supporting.

[0018] Preferably, limiting holes are opened at the same positions as the three abutting blocks on the rotating table. The three limiting holes are fixedly clamped with the limiting columns.

[0019] By adopting the above technical solution, the fixed limit between the rotating table and the outer ring plate can be realized by the snap connection between the limit post and the limit hole, so that the whole device can operate independently after leaving the rotary locking mechanism.

[0020] Preferably, a plurality of clamping grooves are circumferentially and spacedly formed outside the support plate, and clamping blocks fixedly connected to the inner wall of the cylinder are clamped inside the plurality of clamping grooves.

[0021] By adopting the above technical solution, the fixed connection between the clamping block and the cylinder can limit the support plate, so that the support plate will not move along.

[0022] Preferably, a fixed threaded post threadedly connected to the rotary locking plate is fixedly provided in the middle of the upper surface of the bottom fixing plate.

[0023] By adopting the above technical solution, the fixed threaded post can accurately make the bottom fixing plate support and limit the sealing ring.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The position of the sealing ring is adjusted by adjusting the adjusting pad, and the adjusting pad and the sealing ring are supported by the bottom fixing plate and fixed outside the rotary locking plate to achieve the sealing effect in different situations;

[0026] 2. With the cooperation between the rotary telescopic mechanism and the rotary table, and then through the supporting effect of the support plate on the rotary telescopic mechanism and the rotary table, the rotary table drives the turntable and the arc groove to rotate, and then the push rod and the arc plate are pushed out through the cooperation of the moving block and the small cylinder, so that the rubber ring abuts against the inner wall of the cylinder for sealing, achieving a temporary sealing effect, without closing or discharging the gas inside the cylinder and then replacing the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall schematic diagram of the present application;

[0028] Figure 2 is the exploded schematic diagram of the present application;

[0029] Figure 3 is the internal sectional view of the cylinder of the present application;

[0030] Figure 4 is the structural bottom view of the present application;

[0031] Figure 5 is the bottom view of the rotary telescopic mechanism of the present application;

[0032] Figure 6 is the exploded view of the internal structure of the rotary telescopic mechanism and the support plate of the present application;

[0033] Figure 7 This is an enlarged view of the connection relationship of the rotary telescopic mechanism of the present application;

[0034] Figure 8 This is an enlarged view of the external structure of the rotating table and the outer ring structure of the outer ring plate of the present application.

[0035] Reference numerals: 1, rotary locking plate; 2, adjusting pad; 3, sealing ring; 4, bottom fixing plate; 5, locking pin; 6, cylinder; 7, support plate;

[0036] 8, rotary telescopic mechanism; 81, turntable; 82, moving block; 83, push-pull rod; 84, arc plate; 85, rubber ring; 86, arc groove; 87, small cylinder; 88, sliding groove;

[0037] 9, rotating shaft; 10, clamping block; 11, rotating table; 12, abutting block; 13, U-shaped clamping ring; 14, outer ring plate; 15, telescopic groove; 16, limiting column; 17, limiting hole; 18, locking groove; 19, fixed threaded column; 20, clamping groove. Detailed implementation manners

[0038] The following will Figure 1 - Figure 8 make a further detailed description of the present application.

[0039] The embodiment of the present application discloses a spinning seal structure for high reliability of spent fuel transportation containers.

[0040] Referring to Figure 1 , Figure 2 , Figure 3, A spinning seal structure for high reliability of spent fuel transportation containers, including a rotating locking plate 1. A circular hole is provided in the middle of the top surface of the rotating locking plate 1 for convenient disassembly. An adjusting pad 2 and a sealing ring 3 are sleeved on the outer surface of the lower part of the rotating locking plate 1 from top to bottom in a circle. The adjusting pad 2 is located above the sealing ring 3 and is arranged in mutual abutment with the sealing ring 3. The lower surface of the sealing ring 3 is in mutual abutment with the upper surface of the bottom fixing plate 4. A fixed threaded post 19 is fixedly arranged in the middle of the upper surface of the bottom fixing plate 4, and the fixed threaded post 19 is threadedly connected with the rotating locking plate 1 to hold the adjusting pad 2 and the sealing ring 3. The lower part of the rotating locking plate 1 is clamped and fixed with the upper part of the inner cavity of the cylinder body 6. The outer ring of the lower part of the bottom fixing plate 4 is set as an inclined surface, and an annular locking groove is arranged at the abutting position of the upper part of the inner cavity of the cylinder body 6 and the bottom fixing plate 4. The groove is set as an inclined surface on one side of the cylinder wall, and the inclination of this inclined surface is the same as that of the lower inclined surface of the bottom fixing plate 4, which is convenient for docking. Three locking grooves 18 with the same structure are arranged at intervals around the upper part of the cylinder body 6 in a circle. Three locking pins 5 are fixedly arranged at intervals around the outer periphery of the upper part of the rotating locking plate 1 in a circle. The openings and heights of the three locking grooves 18 are the same as the diameters of the three locking pins 5 and can be mutually clamped.

[0041] A rotating locking groove is arranged inside the cylinder body 6, and the positions where the rotating locking groove inside the cylinder body 6 abuts against the outer ring of the lower part of the bottom fixing plate 4 are all set as annular inclined surfaces, so as to achieve the functions of increasing sealing and reducing wear. Three or more locking pins 5 (three are the best) can be arranged around the outer periphery of the upper part of the rotating locking plate 1 by welding or threaded connection. Three or more locking grooves 18 (three are the best) are arranged on the upper part of the cylinder body 6. The locking pins 5 and the locking grooves 18 correspond to each other, and a better clamping effect can be achieved.

[0042] The adjusting pad 2 can be set in multiple layers and installed between the rotating locking plate 1 and the sealing ring 3 to adjust the installation position of the sealing ring 3. The bottom fixing plate 4 and the rotating locking plate 1 are threadedly connected through the fixed threaded post 19, which mainly plays the role of holding the sealing ring 3 and the adjusting pad 2. An operation structure for applying multiple torques can be set on the upper end surface of the rotating locking plate 1. In addition to the opening, an outer extension, a cylinder with a pin, etc. can also be set, which is convenient for tightening or disassembly.

[0043] Refer to Figure 5 、 Figure 6 、 Figure 8, a support plate 7 is provided at the bottom of the rotary locking plate 1, and the upper surface of the support plate 7 is connected to the lower surface of the bottom fixing plate 4 in a rotational manner. The upper circumferential surface in the middle of the support plate 7 is fixedly connected to the outer circumferential surface of the outer ring plate 14. A telescopic groove 15 is provided on the inner wall of the outer ring plate 14 at intervals. There are three telescopic grooves 15 in total on the inner wall of the outer ring plate 14, and the interval distances are equal. The inner surfaces of the three telescopic grooves 15 are respectively slidably arranged with and limited by three limiting columns 16. Springs are provided between the telescopic grooves 15 and the limiting columns 16 for telescopic and reset functions.

[0044] Refer to Figure 3 , Figure 6 , Figure 8 , a number of clamping grooves 20 are provided at equal intervals in a circle outside the support plate 7. A number of clamping blocks 10 are clamped inside the number of clamping grooves 20. The number of clamping blocks 10 are fixedly connected to the surface of the groove provided inside the cylinder body 6. A ring groove is provided at the lower part of the inner circumferential surface of the support plate 7 and is slidably arranged with the ring plate protruding from the lower outer circumferential surface of the rotary table 11. Three abutting blocks 12 are fixedly arranged at equal intervals in a circle outside the rotary table 11. The distances between the three abutting blocks 12 and the limiting columns 16 are equal to the horizontal length of the locking groove 18. The outer surfaces of the three abutting blocks 12 are respectively clamped with the inner surface of the U-shaped clamping ring 13. A limiting hole 17 is provided in a circle outside the rotary table 11 and at the same position as the three abutting blocks 12. The three limiting holes 17 are located in the counterclockwise direction of the abutting blocks 12. The inner diameter of the three limiting holes 17 is 1 - 5 mm larger than the outer diameter of the three limiting columns 16 and can be clamped and fixed with each other. The middle part of the rotary table 11 is fixedly penetrated by the upper end of the rotating shaft 9.

[0045] The clamping groove 20 provided outside the support plate 7 is fixedly connected to the clamping block 10 fixed on the inner cavity groove of the rotary locking plate 1, so that the support plate 7 is in a fixed state. A ring groove is provided at the lower part of the inner circle of the support plate 7 and is rotatably connected with the protruding ring plate provided at the lower outer circle of the rotary table 11. Thus, the rotary table 11 can rotate without affecting the outer ring plate 14. Three abutting blocks 12 are fixedly arranged on the outer circle of the rotary table 11 and are clamped with the U-shaped clamping ring 13 fixed on the lower surface of the rotary locking plate 1. When the U-shaped clamping ring 13 rotates with the rotary locking plate 1, it can drive the abutting blocks 12 to move reciprocally together, and then drive the rotary table 11 to rotate reciprocally. The U-shaped clamping ring 13 is clamped with the abutting blocks 12 from top to bottom. Therefore, the U-shaped clamping ring 13 can be separated from the abutting blocks 12 following the rotary locking plate 1. When the rotary table 11 rotates, the limiting hole 17 will rotate with the rotary table 11 to the position of the limiting column 16 and be clamped and fixed with the limiting column 16. In this way, even if the abutting blocks 12 are separated from the U-shaped clamping ring 13, the rotary table 11 will not rotate randomly. When the abutting blocks 12 are clamped with the U-shaped clamping ring 13 again, it can drive the limiting hole 17 to be separated from the limiting column 16.

[0046] Refer to Figure 6 、 Figure 7 The outer surface of the lower part of the rotating shaft 9 is fixedly connected to the inner surface of the middle part of the turntable 81 in the rotary telescopic mechanism 8. The rotary telescopic mechanism 8 includes a turntable 81 rotatably arranged under the support plate 7 and fixedly connected to the rotating shaft 9. A number of arc-shaped grooves 86 are arranged at intervals around the turntable 81. The inner surfaces of the arc-shaped grooves 86 are slidably arranged with the outer surfaces of a number of small cylinders 87 with the same structure. The lower surfaces of the small cylinders 87 are fixedly connected to the upper surfaces of a number of moving blocks 82 with the same structure. The outer surfaces of the moving blocks 82 are slidably arranged with the inner surfaces of a number of chutes 88 with the same structure and installation method. One end of each chute 88 is connected to the rotating shaft 9 by a swivel joint, and the other end is fixedly connected to the lower surface of the support plate 7. One side of the moving block 82 far from the rotating shaft 9 inside each chute 88 is fixedly connected to one end of a push rod 83. The end of the push rod 83 far from the moving block 82 movably penetrates the surface of the end of the chute 88 far from the moving block 82. One side of each push rod 83 far from the moving block 82 is fixedly connected to the middle part of the inner surface of an arc-shaped plate 84. A number of arc-shaped plates 84 can be combined into a circle, and an elastic rubber ring 85 that can be deformed is sleeved outside the circle formed by the arc-shaped plates 84.

[0047] When the rotating table 11 rotates, it can drive the rotating shaft 9 fixedly connected to it to rotate together, and then drive the turntable 81 to rotate. Since the arc-shaped groove 86 and the chute 88 cooperate to limit the moving block 82 and the small cylinder 87, when the turntable 81 rotates, the arc-shaped groove 86 opened on its upper part drives the small cylinder 87 to move outwards or inwards in an arc shape. At this time, the small cylinder 87 will drive the moving block 82 to reciprocate linearly, and then push the push rod 83 to move together, so as to push the arc-shaped plate 84 and the rubber ring 85 to open outwards or tighten inwards. The rubber ring 85 is made of elastic rubber material because it can be deformed, has good sealing performance and long service life.

[0048] The implementation principle of a spinning seal structure with high reliability for spent fuel transportation containers in the embodiment of the present application is as follows: First, the staff adjusts the adjusting pad 2 according to the actual situation, then sleeved the sealing ring 3 on the lower part of the adjusting pad 2 and pressed it tightly, and threadedly connected the bottom fixing plate 4 to the rotating locking plate 1 through the fixing threaded column 19, so as to support the adjusting pad 2 and the sealing ring 3. Then, the prepared rotating locking plate 1 is placed in the cylinder body 6, and the locking pin 5 is aligned with the locking groove 18 and clamped. At this time, the inclined surface of the bottom fixing plate 4 fits with the inner cavity of the cylinder body 6, and the clamping groove 20 opened on the outside of the support plate 7 is clamped and fixed with the clamping block 10. At this time, the installation of the seal is completed.

[0049] When it is necessary to adjust the adjusting pad 2 or replace the entire seal due to poor sealing effect, the rotary locking plate 1 is rotated counterclockwise by a tool to separate the locking pin 5 from the locking groove 18. However, when rotating counterclockwise, the U-shaped retaining ring 13 at the lower part of the rotary locking plate 1 will drive the abutting block 12 to rotate together, and then drive the rotary table 11 to rotate. The rotation of the rotary table 11 can drive the rotating shaft 9 and the turntable 81 to rotate together, thereby driving the small cylinder 87 to move within the turntable 81 and driving the moving block 82 to push the push rod 83 and the arc-shaped plate 84 outwards, so that the rubber ring 85 can abut and seal against the inner wall of the cylinder body 6. When the locking pin 5 rotates to the opening of the locking groove 18, the limiting hole 17 just engages and fixes with the limiting post 16. At this time, only the rotary locking plate 1 needs to be taken out and the adjusting pad 2 or the sealing ring 3 needs to be replaced, and then it is reinserted into the cylinder body 6 for clamping and fixing, and the abutting block 12 is brought back by the U-shaped retaining ring 13, so as to realize the operation opposite to the above actions, separate the rubber ring 85 from the inner wall of the cylinder body 6, and wait for the next replacement of the rotary locking plate 1 to continue to temporarily seal the cylinder body 6.

[0050] The above are only optional embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, various changes and modifications can be made to the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A high-reliability spin-on sealing structure for a spent fuel transport container, comprising a rotary locking plate (1) and an adjustment pad (2) sleeved on the outer surface of the lower part of the rotary locking plate (1), a sealing ring (3) is abutted on the lower part of the adjustment pad (2), a bottom fixing plate (4) threadedly connected to the rotary locking plate (1) is abutted on the lower part of the sealing ring (3), a barrel (6) is clamped on the lower part of the rotary locking plate (1), three locking grooves (18) are arranged at intervals around the upper part of the barrel (6), and the three locking grooves (18) are mutually clamped with three locking pins (5) that are spaced around and fixed on the upper outer ring of the rotary locking plate (1), characterized in that: A support plate (7) is provided at the bottom of the rotating locking plate (1), a rotating platform (11) is slidably provided inside the supporting plate (7), and a rotating telescopic mechanism (8) is provided at the bottom of the rotating platform (11); The rotating and telescopic mechanism (8) comprises a rotating disk (81) rotatably arranged at the bottom of the support plate (7); a plurality of sliding grooves (88) having the same structure and installation method are arranged around the bottom of the rotating disk (81); a plurality of moving blocks (82) are slidably arranged inside the sliding grooves (88); a plurality of pushing and pulling rods (83) are fixedly arranged on one side of the moving blocks (82); a plurality of arc-shaped plates (84) that can form a circle are fixedly arranged on the side of the pushing and pulling rods (83) away from the moving blocks (82); and a plurality of deformable rubber rings (85) are sleeved on the outside of the arc-shaped plates (84).

2. A high-reliability spinning seal structure for a spent fuel transport container according to claim 1, characterized in that: The rotating and telescopic mechanism (8) further comprises a plurality of arc-shaped grooves (86) which are arranged around and arranged at intervals on the rotating disk (81), and a small cylinder (87) which is fixedly connected to a plurality of moving blocks (82) is slidably arranged in each of the arc-shaped grooves (86).

3. The high-reliability spinning seal structure for a spent fuel transport container according to claim 1, characterized in that: A rotating shaft (9) is fixedly provided through the middle of the rotating platform (11) and has a lower portion fixedly connected to the middle of the rotating disk (81).

4. A high-reliability spinning seal structure for a spent fuel transport container according to claim 3, characterized in that: The outer ring of the rotating platform (11) is provided with three abutment blocks (12) at intervals and around it, and the outsides of the three abutment blocks (12) are all clamped with U-shaped clamping rings (13).

5. The high-reliability spinning seal structure for a spent fuel transport container according to claim 1, characterized in that: An outer ring plate (14) is fixedly arranged in the middle of the support plate (7), and three telescopic grooves (15) are arranged around the inner wall of the outer ring plate (14) at intervals, and limiting columns (16) are slidably arranged inside the three telescopic grooves (15).

6. The high-reliability spinning seal structure for a spent fuel transport container according to claim 3, characterized in that: The rotating platform (11) and the three abutting blocks (12) are provided with limiting holes (17) at the same position, and the three limiting holes (17) are all clamped and fixed to the limiting columns (16).

7. The high-reliability spinning seal structure for a spent fuel transport container according to claim 1, characterized in that: The support plate (7) is provided with a plurality of slots (20) at intervals around the outside, and a plurality of slots (20) are provided with a clamping block (10) fixedly connected to the inner wall of the cylinder (6) inside.

8. The high-reliability spinning seal structure for a spent fuel transport container according to claim 1, characterized in that: A fixed threaded column (19) is fixedly provided in the middle of the upper surface of the bottom fixing plate (4) and is threadedly connected to the rotating locking plate (1).

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