A nuclear waste dewatering system tightening mechanism and docking device

Abstract

The utility model relates to a kind of nuclear waste dehydration system tightening mechanism and docking device, and the tightening mechanism includes: connecting screw rod;Guide sleeve, it is sleeved in the outside of connecting screw rod, connecting screw rod includes connecting end, connecting end is worn out the outside of guide sleeve, connecting screw rod can be moved along axial direction relative to guide sleeve, and be limited relative to guide sleeve rotation, the path that connecting screw rod moves relative to guide sleeve axially includes first position and second position, when connecting screw rod moves from first position to second position, connecting end moves away from guide sleeve;Drive assembly, guide sleeve is connected in drive assembly, and drive assembly is used to drive guide sleeve to rotate with connecting screw rod axis as rotation axis;Elastic member, elastic member is located between guide sleeve and connecting screw rod, when connecting screw rod moves from second position to first position, the elastic force of elastic member is overcome.The tightening mechanism of the application makes the lifting of dehydration device and the connection process of connecting screw rod and nut do not interfere with each other, without manual intervention, realize automated docking, improve efficiency.

Description

Technical Field

[0001] The utility model relates to the field of nuclear waste treatment technology, and particularly relates to a tightening mechanism and a docking device for a nuclear waste dehydration system. Background Technique

[0002] As a dehydration device supporting the HDPE-HIC (High Integrity Container made of polyethylene) loading and dehydration process, it can dehydrate a large amount of free liquid in the waste package, making the volume of the free liquid less than 1% of the solidification volume, achieving the purpose of nuclear waste volume reduction treatment, without generating secondary pollutants. At the same time, the fully enclosed dehydration method ensures environmental, personnel and disposal safety.

[0003] The waste barrel usually has nuts that cooperate with the locking bolts on the dehydration device. During the dehydration operation, after the HIC container is positioned at the dehydration station, the dehydration device descends, and the bolts rotated by the motor on the dehydration device are connected to the nuts on the waste barrel to fix the waste barrel, and then the waste can be dehydrated.

[0004] During the docking process between the bolts on the dehydration device and the nuts on the waste barrel, it often gets stuck because the descending speed of the dehydration device and the screwing speed of the bolts into the nuts are inconsistent, and manual assistance is required for docking, resulting in low efficiency. Content of the Utility Model

[0005] Based on the above description, the utility model provides a tightening mechanism and a docking device for a nuclear waste dehydration system to solve the problem that during the docking process between the bolts on the dehydration device and the nuts on the waste barrel, it often gets stuck because the descending speed of the dehydration device and the screwing speed of the bolts into the nuts are inconsistent, and manual assistance is required for docking, affecting the working efficiency.

[0006] The technical solution of the utility model to solve the above technical problems is as follows: In the first aspect, the present application provides a tightening mechanism for a nuclear waste dehydration system, and the technical solution adopted is as follows: A tightening mechanism for a nuclear waste dehydration system includes: A connecting screw; A guide sleeve, the guide sleeve is sleeved outside the connecting screw. The connecting screw includes a connecting end, and the connecting end penetrates outside the guide sleeve. The connecting screw can move axially relative to the guide sleeve and is restricted from rotating relative to the guide sleeve. The axial movement path of the connecting screw relative to the guide sleeve includes a first position and a second position. When the connecting screw moves from the first position to the second position, the connecting end moves away from the guide sleeve; A driving component, the guide sleeve is connected to the driving component, and the driving component is used to drive the guide sleeve to rotate around the axis of the connecting screw; An elastic element is disposed between the guide sleeve and the connecting screw, and the connecting screw overcomes the elastic force of the elastic element when it moves from the second position to the first position.

[0007] Preferably, the guide sleeve is cylindrical and coaxially sleeved outside the connecting screw, one end of the guide sleeve is closed, the first position is close to the closed end of the guide sleeve, the elastic element is disposed inside the guide sleeve, and the elastic element is located between the closed end of the guide sleeve and the connecting screw.

[0008] Preferably, the elastic element includes a spring coaxial with the guide sleeve, a pressure sleeve is provided inside the guide sleeve, the pressure sleeve is cylindrical and coaxially sleeved outside the elastic element, the end of the pressure sleeve away from the closed end of the guide sleeve is closed, the pressure sleeve can move axially relative to the guide sleeve, and the elastic element is located between the closed end of the guide sleeve and the closed end of the pressure sleeve.

[0009] Preferably, when the pressure sleeve moves away from the closed end of the guide sleeve to a set position, it is restricted from continuing to move away from the closed end of the guide sleeve.

[0010] Preferably, the guide sleeve is provided with an adjusting block, the adjusting block is located between the closed end of the guide sleeve and the elastic element, the elastic element is located between the adjusting block and the pressure sleeve, and the position of the adjusting block in the axial direction of the guide sleeve is adjustable.

[0011] Preferably, the closed end of the guide sleeve is connected to an adjusting bolt, the axis of the adjusting bolt is parallel to the axis of the guide sleeve, the adjusting bolt is threaded onto the closed end of the guide sleeve, and one end of the adjusting bolt passes through the guide sleeve and contacts the adjusting block.

[0012] Preferably, a pressure sensor is provided between the elastic element and the adjusting block, and the pressure sensor is used to detect the pressure between the elastic element and the adjusting block in the axial direction of the guide sleeve.

[0013] Preferably, the path of the connecting screw moving axially relative to the guide sleeve further includes a third position, and the second position is located between the first position and the third position. When the connecting screw moves from the third position to the second position, it is not subject to the elastic force of the elastic element.

[0014] Secondly, this application provides a docking device for a nuclear waste dehydration system, comprising: The tightening mechanism of the nuclear waste dehydration system described above is used to be installed on the top of the base plate of the dehydration device. The guide sleeve is rotatably connected to the base plate. The drive assembly is used to drive the guide sleeve to rotate relative to the base plate about the axis of the connecting screw. The connecting end of the connecting screw extends through the base plate to the bottom of the base plate. The other end of the connecting screw is restricted to pass through the base plate. The first position and the second position are distributed vertically. A connecting nut, which is threadedly adapted to the connecting screw, is used to connect to the top plate of the waste bin.

[0015] Preferably, the connecting nut is connected to a guide tube, the guide tube is coaxially arranged with the connecting nut, the connecting nut is connected to one end of the guide tube, the diameter of the guide tube gradually increases in the direction away from the connecting nut, the other end of the guide tube is used to connect to the top plate of the waste bin, and the top plate of the waste bin is provided with a connecting hole coaxial with and communicating with the guide tube, the connecting hole is used for the connecting screw to pass through.

[0016] Compared with the prior art, the technical solution of this application has at least the following beneficial technical effects: 1. The tightening mechanism of this application drives the guide sleeve to rotate via a drive assembly, thereby rotating the connecting screw. The connecting screw can form a threaded connection with the nut on the waste bin to fix the waste bin and the dewatering device. In the design, the tightening mechanism is installed on the base plate of the dewatering device, with the connecting end of the connecting screw passing through the base plate, while the other end is restricted from passing through the base plate, maintaining the connection between the connecting screw and the guide sleeve. The first and second positions of the connecting screw are vertically distributed. During docking, after the waste bin is positioned, the dewatering device descends, causing the connecting screw to descend. The connecting screw first contacts the nut. During the continuous descent of the dewatering device, the connecting screw is driven by the nut to move relative to the guide sleeve from the second position to the first position, i.e., the connecting screw moves relative to the dewatering device, until the base plate of the dewatering device and the top plate of the waste bin abut against each other. At this point, the connecting screw is in the first position, and the elastic element applies a spring force to the connecting screw, causing the connecting screw to axially abut against the nut. The guide sleeve is then driven to rotate by the drive mechanism. The elastic element provides axial pressure to initially form a threaded connection between the connecting screw and the nut. Subsequently, under the threaded engagement, the connecting screw moves relative to the base plate and the top plate of the waste bin until the upper end of the connecting screw abuts against the base plate. At this point, the waste bin and the base plate of the dewatering device form a fixed connection under the cooperation of the connecting screw and the nut. The lifting and lowering of the dewatering device and the connection process of the connecting screw and the nut do not interfere with each other and require no manual intervention, enabling automated docking and improving efficiency.

[0017] 2. The nuclear waste dehydration system docking device of this application adopts the nuclear waste dehydration system tightening mechanism provided in this application. The lifting and lowering of the dehydration device and the connection process of the connecting screw and nut do not interfere with each other, and no manual intervention is required. It can realize automated docking and effectively improve work efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram of the docking device for the nuclear waste dehydration system provided in this embodiment of the utility model is shown, in which the connecting screw is located in the third position. Figure 2 This is a schematic diagram of the tightening mechanism in the docking device of the nuclear waste dehydration system provided in an embodiment of the present utility model. In the diagram, the connecting screw is located in the second position. Figure 3 This is a schematic diagram of the tightening mechanism in the docking device of the nuclear waste dehydration system provided in an embodiment of the present invention. In the diagram, the connecting screw is located in the first position.

[0019] Explanation of reference numerals in the attached figures: 1. Tightening mechanism; 11. Connecting screw; 111. Guide block; 12. Guide sleeve; 13. Motor; 14. Reducer; 15. Elastic element; 16. Pressure sleeve; 161. Limiting ring; 17. Adjusting block; 18. Adjusting bolt; 19. Pressure plate; 2. Connecting nut; 3. Base plate; 4. Waste bin top plate; 5. Guide tube; 6. Sleeve. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0022] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0023] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0024] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0025] Reference Figure 1 As shown, this application provides a docking device for a nuclear waste dehydration system, including a tightening mechanism 1 and a connecting nut 2. The tightening mechanism 1 is used to be installed on the base plate 3 of the dehydration device, and the connecting nut 2 is used to be connected to the top plate 4 of the waste bin.

[0026] Reference Figure 1 As shown, the tightening mechanism 1 includes a connecting screw 11, a guide sleeve 12, and a drive assembly. The connecting screw 11 is adapted to the connecting nut 2. The guide sleeve 12 is sleeved outside the connecting screw 11. The connecting screw 11 includes a connecting end that extends out of the guide sleeve 12. The connecting screw 11 can move axially relative to the guide sleeve 12 and is restricted from rotating relative to the guide sleeve 12. The guide sleeve 12 is connected to the drive assembly, which drives the guide sleeve 12 to rotate about the axis of the connecting screw 11.

[0027] Specifically, during installation, both the guide sleeve 12 and the drive assembly are connected to the base plate 3 of the dehydration device. The guide sleeve 12 can rotate relative to the base plate 3, and the drive assembly is used to drive the guide sleeve 12 to rotate.

[0028] In this embodiment, the base plate 3 is horizontal and the tightening mechanism 1 is installed on the base plate 3 for illustration and description.

[0029] Reference Figure 1 As shown, the connecting screw 11 is perpendicular to the base plate 3. The guide sleeve 12 is cylindrical and coaxially sleeved on the connecting screw 11. The lower end of the guide sleeve 12 is connected to the base plate 3 through a bearing. The drive assembly is located above the guide sleeve 12. The drive assembly includes a motor 13 and a reducer 14. The motor 13 is fixed on a bracket on the base plate 3. The output shaft of the motor 13 and the input shaft of the reducer 14 are coaxially fixed. The output shaft of the reducer 14 is vertically downward and coaxially fixed with the guide sleeve 12.

[0030] Reference Figure 1 As shown, the lower end of the connecting screw 11 is the connecting end, which extends through the through hole on the base plate 3 to the bottom of the base plate 3. The upper end of the connecting screw 11 is located inside the guide sleeve 12, and a guide block 111 is connected to the upper end of the connecting screw 11. The guide block 111 is adapted to the inner hole of the guide sleeve 12, and both have non-circular cross-sections. The specific cross-section can be designed as a rectangle or hexagon, etc., to achieve the purpose of allowing the connecting screw 11 to move axially relative to the guide sleeve 12 and restricting relative rotation. The maximum diameter of the guide block 111 is set to be larger than the diameter of the through hole on the base plate 3 to prevent the guide block 111 from passing through the through hole. In addition, during the design, when the guide block 111 abuts against the top surface of the base plate 3, the guide block 111 still remains inside the guide sleeve 12.

[0031] Reference Figure 1 As shown, the connecting nut 2 is fixed to the top plate 4 of the waste bin during installation. The connecting nut 2 is connected to a guide tube 5, which is coaxial with the connecting nut 2. The connecting nut 2 is connected to one end of the guide tube 5. The diameter of the guide tube 5 gradually increases in the direction away from the connecting nut 2. The other end of the guide tube 5 is used to connect to the top plate 4 of the waste bin. The top plate 4 of the waste bin is provided with a connecting hole that is coaxial with and communicates with the guide tube 5. The connecting hole is used for the connecting screw 11 to pass through.

[0032] Reference Figure 1 As shown, specifically, the guide tube 5 and the connecting nut 2 are set inside the waste bin and connected to the bottom of the waste bin top plate 4. The guide tube 5 and the connecting nut 2 are both set with vertical axes. The upper end of the guide tube 5 is fixed to the waste bin top plate 4, and the connecting nut 2 is connected to the lower end of the guide tube 5.

[0033] During the docking operation, after the waste bin is positioned, the dewatering device descends, causing the connecting screw 11 to descend as well. The connecting screw 11 first passes through the connecting hole on the top plate 4 of the waste bin, then passes through the guide tube 5 and contacts the nut. The guide tube 5 serves as a positioning guide, ensuring that the connecting screw 11 and the connecting nut 2 are aligned. As the dewatering device continues to descend, the connecting screw 11 is driven by the nut to move upward relative to the guide sleeve 12, that is, the connecting screw 11 moves upward relative to the dewatering device and the waste bin, until the bottom plate 3 of the dewatering device and the top plate 4 of the waste bin abut against each other. Then, the drive mechanism drives the guide sleeve 12 to rotate, which in turn drives the connecting screw 11 to rotate and form a threaded connection with the nut. Afterward, under the threaded engagement, the connecting screw 11 moves downward relative to the bottom plate 3 and the top plate 4 of the waste bin, until the upper end of the connecting screw 11 abuts against the bottom plate 3. At this point, the waste bin and the bottom plate 3 of the dewatering device are fixedly connected by the cooperation of the connecting screw 11 and the nut. The lifting and lowering of the dehydration device and the connection process between the connecting screw 11 and the nut do not interfere with each other and require no manual intervention, thus achieving automated docking and improving efficiency.

[0034] Reference Figure 1 , Figure 2 and Figure 3As shown, further, an elastic element 15 is provided between the guide sleeve 12 and the connecting screw 11. The path of the connecting screw 11 moving axially relative to the guide sleeve 12 includes a first position and a second position. When the connecting screw 11 moves from the first position to the second position, the connecting end moves away from the guide sleeve 12, and when the connecting screw 11 moves from the second position to the first position, it overcomes the elastic force of the elastic element 15.

[0035] Reference Figure 2 and Figure 3 As shown, the first position and the second position are vertically distributed. With this arrangement, when the connecting screw 11 is driven by the nut to move relative to the guide sleeve 12, it moves from the second position to the first position. When it abuts against the bottom plate 3 of the dewatering device and the top plate 4 of the waste bin, the connecting screw 11 is in the first position. At this time, the elastic element 15 applies a spring force to the connecting screw 11, causing the connecting screw 11 to axially abut against the nut. When the connecting screw 11 rotates, the elastic element 15 provides axial pressure for the initial threaded connection between the connecting screw 11 and the nut. Afterwards, under the threaded engagement, the connecting screw 11 moves relative to the bottom plate 3 and the top plate 4 of the waste bin. This ensures that the connecting screw 11 and the nut form a threaded connection.

[0036] Specifically, the upper end of the guide sleeve 12 is closed and fixed to the output shaft of the reducer 14, and the elastic element 15 is located inside the guide sleeve 12 and between the closed end of the guide sleeve 12 and the connecting screw 11.

[0037] Reference Figure 2 and Figure 3 As shown, the elastic element 15 is a spring, which is coaxially arranged with the guide sleeve 12. A pressure sleeve 16 is provided inside the guide sleeve 12. The pressure sleeve 16 is cylindrical and coaxially sleeved around the elastic element 15. The end of the pressure sleeve 16 away from the closed end of the guide sleeve 12 is closed. The pressure sleeve 16 can move axially relative to the guide sleeve 12. The elastic element 15 is located between the closed end of the guide sleeve 12 and the closed end of the pressure sleeve 16. When the connecting screw 11 moves upward, it can abut against the pressure sleeve 16 and drive the elastic element 15 to elastically deform.

[0038] Reference Figure 1 , Figure 2 and Figure 3 As shown, further, the path of the connecting screw 11 moving axially relative to the guide sleeve 12 also includes a third position. The second position is located between the first position and the third position. When the connecting screw 11 moves from the third position to the second position, it is not subject to the elastic force of the elastic element 15. Specifically, the third position is located below the second position. In this embodiment, when the guide block 111 contacts the base plate 3, the connecting screw 11 is located in the third position.

[0039] Reference Figure 2 and Figure 3As shown, to prevent the connecting bolt from being subjected to the elastic force of the elastic element 15 when moving from the third position to the second position, the pressure sleeve 16 is restricted from further moving away from the closed end of the guide sleeve 12 when it moves to the set position. Specifically, the inner hole of the guide sleeve 12 is divided into two sections axially, with a larger diameter section near the closed end and a smaller diameter section, and the guide block 111 is located in the section with the smaller diameter. A limit ring 161 is coaxially connected to one end near the closed end of the guide sleeve 12. The diameter of the limit ring 161 is the same as that of the larger diameter section of the inner hole of the guide sleeve 12. When the pressure sleeve 16 moves downward relative to the guide sleeve 12, it can move to the stepped surface between the limit ring 161 and the two sections of the inner hole of the guide sleeve 12 to resist it, thereby restricting the pressure sleeve 16 from moving further downward, and at this time, the elastic element 15 is in an elastic deformation state.

[0040] In this embodiment, when the connecting screw 11 moves upward to the initial contact between the guide block 111 and the pressure sleeve 16, the connecting screw 11 is in the second position. When the bottom plate 3 descends to abut against the top plate 4 of the waste bin and the connecting screw 11 is not connected with the connecting nut 2, the connecting screw 11 is in the first position.

[0041] With the above configuration, when the connecting screw 11 is driven upward relative to the base plate 3 by the connecting nut 2, it is not subjected to the elastic force of the elastic element 15 for an initial distance, thereby reducing the downward resistance of the dehydration device. When the connecting screw 11 reverses and disengages from the connecting nut 2, it is also not subjected to the elastic force of the elastic element 15 for an initial distance, thereby reducing the axial pressure between the threads of the connecting screw 11 and the connecting nut 2, thus reducing the wear of the connecting screw 11 and extending its service life.

[0042] Reference Figure 2 and Figure 3 As shown, further, the guide sleeve 12 is also provided with an adjusting block 17. The adjusting block 17 is located between the closed end of the guide sleeve 12 and the elastic element 15. The elastic element 15 is located between the adjusting block 17 and the pressure sleeve 16. The position of the adjusting block 17 in the axial direction of the guide sleeve 12 is adjustable.

[0043] Reference Figure 2 and Figure 3 As shown, specifically, the adjusting block 17 is located within the larger diameter section of the guide sleeve 12, and the two ends of the elastic element 15 abut against the adjusting block 17 and the pressure sleeve 16, respectively. When the connecting screw 11 moves to the first position, the compression of the elastic element 15 depends on the axial distance between the adjusting block 17 and the connecting screw 11. Therefore, by adjusting the position of the adjusting block 17, the elastic force of the elastic element 15 can be adjusted, that is, the axial pressure between the connecting screw 11 and the connecting nut 2 when no threaded connection is formed can be adjusted. This allows for adjustment when the elastic force of the elastic element 15 weakens, ensuring that sufficient axial pressure is applied to the connecting screw 11 to guarantee that the connecting screw 11 and the connecting nut 2 enter the threaded connection state.

[0044] Reference Figure 2 and Figure 3 As shown, an adjusting bolt 18 is connected to the closed end of the guide sleeve 12. The axis of the adjusting bolt 18 is parallel to the axis of the guide sleeve 12. The adjusting bolt 18 is threaded onto the closed end of the guide sleeve 12, and one end of the adjusting bolt 18 passes through the guide sleeve 12 and contacts the adjusting block 17. The two ends of the adjusting bolt 18 are located inside and outside the guide sleeve 12, respectively. By turning the adjusting bolt 18, its axial position relative to the guide sleeve 12 can be moved, thereby adjusting the axial position of the adjusting block 17 relative to the guide sleeve 12. This is simple and convenient.

[0045] Furthermore, a pressure sensor is provided between the elastic element 15 and the adjusting block 17. The pressure sensor is used to detect the pressure between the elastic element 15 and the adjusting block 17 in the axial direction of the guide sleeve 12.

[0046] Specifically, a pressure plate 19 is provided between the adjusting block 17 and the elastic element 15. A pressure sensor is located between the pressure plate 19 and the adjusting block 17 (the pressure sensor is not shown in the figure), and the elastic element 15 is held against the pressure plate 19. The pressure sensor detects the pressure between the elastic element 15 and the adjusting block 17, that is, indirectly detects the pressure between the connecting screw 11 and the connecting nut 2. If the axial pressure between the connecting screw 11 and the connecting nut 2 is too high or too low when no threaded connection is formed, the control system can issue a prompt to remind the operator to adjust the pressure of the elastic element 15 to a suitable range. This ensures sufficient pressure between the connecting screw 11 and the connecting nut 2 to ensure the threaded connection is achieved, while avoiding excessive pressure that could lead to excessive wear of the threads of the connecting screw 11 and the connecting nut 2.

[0047] Reference Figure 1 As shown, in this embodiment, a sleeve 6 is provided on the base plate 3, which is coaxially sleeved outside the guide sleeve 12. The upper end of the sleeve 6 is fixed to the reducer 14, and the lower end is fixed to the base plate 3, so as to protect the internal structure through the sleeve 6. In order to facilitate the turning of the adjusting bolt 18, an operating port is provided on the sleeve 6 at the height of the adjusting bolt 18. When it is necessary to turn the adjusting bolt 18, the guide sleeve 12 is rotated so that the adjusting bolt 18 is close to the operating port, so that the tool can be passed through the operating port to turn the adjusting bolt 18.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tightening mechanism for a nuclear waste dehydration system, characterized in that, include: Connecting screw (11); A guide sleeve (12) is sleeved outside the connecting screw (11). The connecting screw (11) includes a connecting end that extends out of the guide sleeve (12). The connecting screw (11) can move axially relative to the guide sleeve (12) and is restricted from rotating relative to the guide sleeve (12). The path of the connecting screw (11) moving axially relative to the guide sleeve (12) includes a first position and a second position. When the connecting screw (11) moves from the first position to the second position, the connecting end moves away from the guide sleeve (12). A drive assembly, wherein the guide sleeve (12) is connected to the drive assembly, and the drive assembly is used to drive the guide sleeve (12) to rotate about the axis of the connecting screw (11); An elastic element (15) is disposed between the guide sleeve (12) and the connecting screw (11). When the connecting screw (11) moves from the second position to the first position, it overcomes the elastic force of the elastic element (15).

2. The tightening mechanism (1) of the nuclear waste dehydration system according to claim 1, characterized in that: The guide sleeve (12) is cylindrical and coaxially sleeved outside the connecting screw (11). One end of the guide sleeve (12) is closed, and the first position is close to the closed end of the guide sleeve (12). The elastic element (15) is disposed inside the guide sleeve (12) and is located between the closed end of the guide sleeve (12) and the connecting screw (11).

3. The tightening mechanism (1) of the nuclear waste dehydration system according to claim 2, characterized in that: The elastic element (15) includes a spring coaxial with the guide sleeve (12). The guide sleeve (12) is provided with a pressure sleeve (16). The pressure sleeve (16) is cylindrical and coaxially sleeved outside the elastic element (15). The end of the pressure sleeve (16) away from the closed end of the guide sleeve (12) is closed. The pressure sleeve (16) can move axially relative to the guide sleeve (12). The elastic element (15) is located between the closed end of the guide sleeve (12) and the closed end of the pressure sleeve (16).

4. The tightening mechanism (1) of the nuclear waste dehydration system according to claim 3, characterized in that: When the pressure sleeve (16) moves away from the closed end of the guide sleeve (12) to a set position, it is restricted from continuing to move away from the closed end of the guide sleeve (12).

5. The tightening mechanism (1) of the nuclear waste dehydration system according to claim 3, characterized in that: The guide sleeve (12) is provided with an adjusting block (17), which is located between the closed end of the guide sleeve (12) and the elastic element (15). The elastic element (15) is located between the adjusting block (17) and the pressure sleeve (16). The position of the adjusting block (17) in the axial direction of the guide sleeve (12) is adjustable.

6. The tightening mechanism (1) of the nuclear waste dehydration system according to claim 5, characterized in that: The closed end of the guide sleeve (12) is connected to an adjusting bolt (18). The axis of the adjusting bolt (18) is parallel to the axis of the guide sleeve (12). The adjusting bolt (18) is threaded onto the closed end of the guide sleeve (12). One end of the adjusting bolt (18) passes into the guide sleeve (12) and contacts the adjusting block (17).

7. The tightening mechanism (1) of the nuclear waste dehydration system according to claim 6, characterized in that: A pressure sensor is provided between the elastic element (15) and the adjusting block (17), and the pressure sensor is used to detect the pressure between the elastic element (15) and the adjusting block (17) in the axial direction of the guide sleeve (12).

8. The tightening mechanism (1) of the nuclear waste dehydration system according to claim 1, characterized in that: The path of the connecting screw (11) moving axially relative to the guide sleeve (12) also includes a third position, the second position being located between the first position and the third position, and the connecting screw (11) is not subject to the elastic force of the elastic element (15) when it moves from the third position to the second position.

9. A docking device for a nuclear waste dehydration system, characterized in that, include: The nuclear waste dehydration system tightening mechanism (1) as described in any one of claims 1-8 is used to be installed on the top of the dehydration device base plate (3), wherein the guide sleeve (12) is rotatably connected to the base plate (3), the driving assembly is used to drive the guide sleeve (12) to rotate relative to the base plate (3) about the axis of the connecting screw (11), the connecting end of the connecting screw (11) extends through the base plate (3) to the bottom of the base plate (3), the other end of the connecting screw (11) is restricted to pass through the base plate (3), and the first position and the second position are distributed vertically; A connecting nut (2) is threadedly fitted to the connecting screw (11) and is used to connect to the top plate (4) of the waste bin.

10. The docking device for the nuclear waste dehydration system according to claim 9, characterized in that: The connecting nut (2) is connected to a guide tube (5). The guide tube (5) is coaxially arranged with the connecting nut (2). The connecting nut (2) is connected to one end of the guide tube (5). The diameter of the guide tube (5) gradually increases in the direction away from the connecting nut (2). The other end of the guide tube (5) is used to connect with the top plate (4) of the waste bin. The top plate (4) of the waste bin is provided with a connecting hole that is coaxial with and communicates with the guide tube (5). The connecting hole is used for the connecting screw (11) to pass through.

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