Nuclear power station sling distributor with shaft puller and transition pulling plate

Abstract

The invention discloses a nuclear power plant sling distributor with a shaft extractor and a transition pulling plate. The nuclear power plant sling distributor comprises a distributor body, a pin shaft and the shaft extractor. An upper lug plate and a lower lug plate are arranged on the distributor main body; the pin shaft is used for connecting the distributor and the pull plate; the shaft extractor comprises a shell, a cover body and a transmission mechanism, the shell is installed on the upper lug plate and located on the outer side of the upper lug plate, the cover body is installed at one end of the shell, the pin shaft is installed in the shell and can move in the shell, and the transmission mechanism can drive the pin shaft to move in the shell. Therefore, the purpose of connecting the distributor with the pull plate or disconnecting the distributor from the pull plate is achieved. The shaft puller is integrated on the distributor, the pin shaft is controlled to be inserted and pulled out by rotating the hand wheel, auxiliary tools are not needed, the operation risk and the operation complexity are reduced, the pin shaft and a pin hole cannot be damaged in the connecting and dismounting process, and the service life of equipment is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of nuclear power construction technology, and in particular to a nuclear power plant sling distributor with a shaft puller and a transition pull plate. Background Technology

[0002] During the installation of the containment vessel at a nuclear power plant, a crane is required for hoisting. Due to the large number of slings, it is difficult to directly connect the crane hook and the slings. Typically, a distributor is used to connect the crane to the multiple slings. Specifically, the upper lug of the distributor is connected to the crane, and the lower lug of the distributor is connected to the wire rope. Furthermore, during the connection between the upper lug and the crane, a pin is used to connect the distributor and the crane.

[0003] Some existing nuclear power plant sling distributors, such as the nuclear power steel containment vessel lifting distributor with announcement number CN107777535A, are characterized by their large weight and size. The weight of the pins they are used with is also large (up to nearly 1 ton). Due to the high height of the through hole in the upper ear plate, the installation of the distributor with the crane is extremely inconvenient. Moreover, when installing the pins, it is often necessary to use auxiliary tools (heavy objects) to strike the pins and force them into the pin holes. The traditional pin installation method not only requires auxiliary tools but also carries the risk of damaging the pins and pin holes, thus shortening the service life of the equipment. Summary of the Invention

[0004] The purpose of this invention is to solve some problems existing in the prior art. It proposes a nuclear power plant sling distributor with a shaft puller and a transition plate. The shaft puller is integrated into the distributor. By rotating the handwheel, the insertion and removal of the pin shaft can be controlled. No auxiliary tools are needed, which reduces the operation risk and complexity. Moreover, the pin shaft and pin hole will not be damaged during the connection and disassembly process, thus ensuring the service life of the equipment.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A nuclear power plant sling distributor with a shaft puller and a transition plate, comprising: A distributor body, wherein the distributor body is provided with an upper ear plate and a lower ear plate; Pin, used to connect the distributor and the connector; 1 A shaft puller for inserting and removing a pin; The shaft puller includes a housing, a cover, and a transmission mechanism. The housing is mounted on the upper ear plate and located outside the upper ear plate. The cover is mounted on one end of the housing. The pin is installed inside the housing and can move within the housing. The transmission mechanism can drive the pin to move within the housing to achieve the insertion or removal of the pin, thereby achieving the purpose of connecting the distributor and the connector or removing the distributor and the connector.

[0006] In some embodiments: the transmission mechanism includes a guide nut and a lead screw. The guide nut is installed in the pin and is adapted to the lead screw. The lead screw is installed on the cover and can rotate relative to the cover. The lead screw passes through the cover and enters the housing and is threadedly connected to the guide nut. By rotating the lead screw, the guide nut can be driven to move, which in turn can drive the pin to move within the housing. The pin is provided with a shaft hole that extends laterally through the entire pin and has a diameter greater than or equal to the diameter of the lead screw body. The center of the shaft hole is on the same straight line as the center of the lead screw and the center of the guide nut.

[0007] In some embodiments: the shaft puller further includes a bearing housing and a bearing, the bearing housing being mounted on the cover, the bearing being mounted inside the bearing housing, and the inner ring contacting the lead screw.

[0008] In some embodiments: the bearing housing is provided with two bearing mounting slots, and correspondingly, there are two bearings, which are respectively installed in the two bearing mounting slots.

[0009] In some embodiments: the shaft puller further includes a handwheel, which is mounted on the lead screw and located outside the cover, and the handwheel is provided with a handle.

[0010] In some embodiments, the shaft puller further includes a dust guard ring, which is mounted on the bearing housing and located on the outside of the bearing.

[0011] In some embodiments, the shaft puller further includes a sleeve fitted onto the lead screw and located between the handwheel and the dustproof retaining ring.

[0012] In some embodiments, a transition plate is also included, which is used to connect the distributor and the wire rope. One end of the transition plate is connected to the lower ear plate and the other end is connected to the wire rope casting joint.

[0013] In some embodiments: the transition plate includes an inner ear plate, an outer ear plate, a connecting plate, an inner reinforcing ring, and an outer reinforcing ring. The inner ear plate is connected to the lower ear plate through a connecting mechanism, and the outer ear plate is connected to the wire rope casting joint through a connecting mechanism. The connecting plate is installed inside the inner ear plate and the outer ear plate to connect the inner ear plate and the outer ear plate. The inner reinforcing ring is installed on the inner side of the inner ear plate, and the outer reinforcing ring is installed on the outer side of the outer ear plate.

[0014] In some embodiments: the connecting mechanism includes a connecting shaft, a slot and a plate provided on the connecting shaft, the connecting shaft passes through the transition plate and the lower ear plate and is fixed by the slot and the plate, the connecting shaft passes through the transition plate and the wire rope casting joint and is fixed by the slot and the plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The distributor body of the present invention is provided with a shaft puller, which can be used to insert and remove pins. The shaft puller includes a housing, a cover, a transmission mechanism, and a handwheel. By rotating the handwheel on the shaft puller, the insertion and removal of the pin can be controlled. The insertion and removal of the pin can be completed by simple rotation without the need for other auxiliary tools, which reduces the operation risk and complexity. Since the pin moves along a predetermined trajectory, the pin and pin hole will not be damaged during connection and disassembly. When connection is required, the handwheel is rotated forward to extend the pin from the housing and insert the pin into the upper ear plate and the connector to complete the connection between the distributor and the connector. When disassembly is required, the handwheel is rotated in the reverse direction to retract the pin back into the housing and disassemble the connection between the distributor and the connector.

[0016] 2. The distributor body of the present invention is provided with a transition plate. The distributor can be connected to the wire rope casting joint through the transition plate, thereby achieving the purpose of connecting the new type of wire rope casting joint. Attached Figure Description

[0017] Figure 1 This is a perspective view of the nuclear power plant sling distributor of the present invention; Figure 2 This is the present invention. Figure 1 A sectional view; Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the image; Figure 4 This is a perspective view of the transition plate of the present invention; Figure 5 This is a perspective view of the connecting mechanism of the present invention; Figure 6 This invention relates to the distribution and connection of nuclear power plant lifting slings and connectors, and the connection status of wire rope casting joints. Figure 7 This is the present invention. Figure 6 Enlarged view of point B in the image; Figure 8 This is the present invention. Figure 7 Partial sectional view in the middle.

[0018] Figure label: 1. Distributor body, 101. Upper ear plate, 102. Lower ear plate; 2. Shaft puller, 201. Housing, 202. Cover, 203. Pin, 2031. Shaft hole, 204. Transmission mechanism, 2041. Guide nut, 2042. Lead screw, 205. Bearing seat, 206. Bearing, 207. Handwheel, 2071. Handle, 208. Dustproof retaining ring, 209. Sleeve; 3. Transition plate, 301. Inner ear plate, 302. Outer ear plate, 303. Connecting plate, 304. Inner reinforcing ring, 305. Outer reinforcing ring; 4. Connecting mechanism, 401. Connecting shaft, 402. Slot, 403. Plate; 5. Connectors; 6. Steel wire rope casting joint. Detailed Implementation

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0020] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. The words “a” or “one” and similar terms used in this specification and claims do not indicate a limitation of quantity, but rather indicate the presence of at least one. “A plurality” includes two, equivalent to at least two. The words “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” covers the element or object listed following “comprising” or “including” and its equivalents, and does not exclude other elements or objects. The words “connected” or “linked” and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0021] like Figures 1-8 As shown, some preferred embodiments of the nuclear power plant sling distributor with shaft puller and transition plate of this application will be disclosed and described in the following description.

[0022] Please refer to the following for details. Figure 1 and Figure 2A nuclear power plant sling distributor with a shaft puller and a transition plate includes a distributor body 1, a pin 203 and a shaft puller 2. The distributor body 1 has an upper ear plate 101 at the top and a lower ear plate 102 at the bottom. The pin 203 is used to connect the distributor and the connector 5. The shaft puller 2 is used to insert and remove the pin 203. Specifically, the shaft puller 2 includes a housing 201, a cover 202, and a transmission mechanism 204. The housing 201 is fixedly installed on the upper ear plate 101 and is located on the outside of the upper ear plate 101 and aligned with the through hole of the upper ear plate 101. The housing 201 is a hollow cylindrical structure. The cover 202 is fixedly installed on one end of the housing 201. The pin 203 is installed inside the housing 201 and can move inside the housing 201. The transmission mechanism 204 can drive the pin 203 to move inside the housing 201 to realize the insertion or removal of the pin 203, thereby achieving the purpose of connecting the distributor and the connector 5 or removing the distributor and the connector 5. In other words, the main body 1 of this distributor comes with a shaft puller 2. The transmission mechanism 204 on the shaft puller 2 allows for the insertion or removal of the pin 203, thereby achieving the purpose of connecting or removing the distributor from the connector 5. This simplifies the connection between the distributor and the connector 5 without the need for other auxiliary tools, reducing operational risks and complexity. Furthermore, the connection and removal process does not damage the pin 203 or the pin hole, extending the equipment's service life. In short, using the shaft puller 2 to insert the pin 203 into the upper ear plate 101 and the connector 5 allows for quick connection between the distributor and the connector 5 (crane). Using the shaft puller 2 to remove the pin 203 from the upper ear plate 101 and the connector 5 allows for quick disassembly between the distributor and the connector 5 (crane).

[0023] It should be noted that both the upper ear plate 101 and the connector 5 are provided with through holes for the pin 203 to pass through, and the diameter of the through hole is greater than or equal to the diameter of the pin 203. At the same time, the axis of the pin 203 and the center of the through hole of the upper ear plate 101 are always on the same straight line. Under normal circumstances, the pin 203 can only move laterally along the direction of the through hole, which facilitates the insertion or exit of the pin 203.

[0024] In this embodiment, the shaft puller 2, or housing 201, can be fixed to the through hole of the upper ear plate 101 by screws or welding; the cover 202 can be fixed to the housing 201 by screws or welding.

[0025] Please refer to the following for details. Figure 2 and Figure 3The transmission mechanism 204 includes a guide nut 2041 and a lead screw 2042. The guide nut 2041 is fixedly installed in the pin 203 and is adapted to the lead screw 2042. The lead screw 2042 is installed on the cover 202 and can rotate relative to the cover 202. The lead screw 2042 passes through the cover 202 and enters the housing 201, and is threadedly connected to the guide nut 2041. By rotating the lead screw 2042, the guide nut 2041 can be driven to move, which in turn can drive the pin 203 to move within the housing 201. The fixed connection between the guide nut 2041 and the pin 203 can be regarded as a nut-slider. Specifically, rotating the lead screw 2042 in the forward direction drives the guide nut 2041, which cooperates with the lead screw 2042, and the pin 203, which is fixedly connected to the guide nut 2041, to move laterally to the right. This causes the pin 203 to extend out of the housing 201 and enter the upper ear plate 101 and the connector 5, connecting the distributor and the connector 5 (crane). Rotating the lead screw 2042 in the reverse direction drives the guide nut 2041, which cooperates with the lead screw 2042, and the pin 203, which is fixedly connected to the guide nut 2041, to move laterally to the left. This causes the pin 203 to leave the upper ear plate 101 and the connector 5 and re-enter the housing 201, disconnecting the distributor from the connector 5 (crane).

[0026] In this embodiment, a mounting groove for mounting a guide nut 2041 is provided at one end of the pin 203, and the guide nut 2041 is mounted in the pin 203 by screws.

[0027] It is worth mentioning that the left end of the pin 203 is provided with a protruding locking part (not shown in the figure). When the pin 203 moves to the rightmost end, the locking part will abut against the outer wall of the upper ear plate 101, restricting the pin 203 from moving further to the right, thereby locking the pin 203 and preventing the pin 203 from moving excessively and dislodging from the housing 201. At the same time, when the locking part abuts against the outer wall of the upper ear plate 101, the lead screw is difficult to rotate further in the same direction, warning the user that the pin 203 has moved to the rightmost end, connecting the upper ear plate 101 and the connector 5 together.

[0028] It should be noted that the rotation direction of the drive pin 203 extending out of the housing 201 is forward rotation; the rotation direction of the drive pin 203 retracting into the housing 201 is reverse rotation.

[0029] Please refer to the following for details. Figure 2 and Figure 3The pin 203 has a shaft hole 2031 that extends laterally through the entire pin 203. The diameter of the shaft hole 2031 is greater than or equal to the diameter of the lead screw 2042. The center of the shaft hole 2031, the center of the lead screw 2042, and the center of the guide nut 2041 are all on the same straight line. This avoids interference between the lead screw 2042 and the pin 203. When the lead screw 2042 is rotated, the pin 203 will not interfere with the lead screw 2042, ensuring that the pin 203 can move normally.

[0030] It should be noted that the lead screw 2042 body refers to the threaded part of the lead screw 2042. In this embodiment, the part of the lead screw 2042 located inside the housing 201 is threaded.

[0031] In this embodiment, the unthreaded portion of the lead screw 2042 extends from the cover 202, which facilitates the rotation of the lead screw 2042.

[0032] Please refer to the following for details. Figure 3 The shaft puller 2 also includes a bearing 206 seat 205 and a bearing 206. The bearing 206 seat 205 is fixedly installed on the cover 202, and the bearing 206 is fixedly installed inside the bearing 206 seat 205, with its inner ring contacting the unthreaded portion of the lead screw 2042. Thus, by mounting the bearing 206 on the lead screw 2042, the bearing 206 converts sliding friction into rolling friction through rolling elements (such as balls or rollers), significantly reducing the resistance to rotation of the lead screw 2042 and improving transmission efficiency. Simultaneously, the bearing 206 seat 205 and the bearing 206 securely mount the lead screw 2042 on the cover 202, providing a limiting installation for the lead screw 2042.

[0033] Please refer to the following for details. Figure 3 The bearing 206 seat 205 is provided with two bearing mounting slots (not shown in the figure). Correspondingly, there are two bearings 206, which are installed in the two bearing mounting slots respectively. In this way, two bearings 206 are installed on the lead screw 2042, and the two bearings 206 share the load, avoiding the failure of a single bearing 206 due to overload. At the same time, the paired bearings 206 can form symmetrical support through preload, and bear axial forces in different directions respectively.

[0034] In this embodiment, the bearing 206 seat 205 is fixed to the cover 202 by screws.

[0035] In this embodiment, the bearing 206 is an angular contact ball bearing 206, a tapered roller bearing 206, or a deep groove ball bearing 206, which can be selected according to the actual situation.

[0036] Please refer to the following for details. Figure 3The shaft puller 2 also includes a handwheel 207, which is fixedly installed on the lead screw 2042 and located outside the cover 202. The handwheel 207 is provided with a handle. In this way, the handwheel 207 can be rotated by the handle, which in turn can drive the lead screw 2042 to rotate together. By extending the lever arm, the handwheel 207 significantly reduces the tangential force required to rotate the lead screw 2042. At the same time, when directly turning the lead screw 2042 by hand, the contact surface between the palm and the lead screw 2042 is prone to slippage. The handwheel 207 can provide a stable gripping point.

[0037] In this embodiment, the handwheel 207 is fixed to the lead screw 2042 by the cooperation of screws and keyways. Specifically, the handwheel 207 is provided with a key, the lead screw 2042 is provided with a slot, the screws connect the handwheel 207 and the lead screw 2042 together, and the keyway can prevent the handwheel 207 and the lead screw 2042 from slipping when the handwheel 207 rotates.

[0038] Please refer to the following for details. Figure 3 The shaft puller 2 also includes a dustproof ring 208, which is installed on the bearing 206 seat 205 and located on the outside of the bearing 206. In this way, the dustproof ring 208 can protect the inside of the bearing 206 from the intrusion of external contaminants and prevent lubricant leakage, thereby extending the service life of the bearing 206 and maintaining performance stability.

[0039] In this embodiment, the dustproof retaining ring 208 is clamped onto the bearing 206 seat 205 by an interference fit.

[0040] Please refer to the following for details. Figure 3 The shaft puller 2 also includes a sleeve 209, which is sleeved on the lead screw 2042 and located between the handwheel 207 and the dustproof ring 208. In this way, the sleeve 209 separates the handwheel 207 from the cover 202, preventing the handwheel 207 from contacting and rubbing against the cover 202 and affecting the rotation of the lead screw 2042.

[0041] Because a new type of steel wire rope with a cast-in-place joint has emerged, the lower ear plate 102 of the traditional distributor cannot be directly connected to the new steel wire rope. Therefore, to facilitate the connection between the distributor and the new steel wire rope, a nuclear power plant sling distributor with a shaft puller and a transition plate 3 is proposed. Please refer to [reference needed]. Figure 1 The transition plate 3 is used to connect the distributor and the wire rope. One end of the transition plate 3 is connected to the lower ear plate 102 and the other end is connected to the wire rope casting joint 6. The wire rope is transferred through the transition plate 3, which acts as a connector, so that the distributor can be connected to new types of wire ropes, making the distributor more widely applicable.

[0042] In this embodiment, there are 16 lower ear plates 102, and correspondingly, there are also 16 transition pull plates 3; of course, the number of lower ear plates 102 can also be 4, 6, 8, 10, 12 or 20, and correspondingly, the number of transition pull plates 3 can also be 4, 6, 8, 10, 12 or 20.

[0043] Please refer to the following for details. Figure 4 The transition plate 3 includes an inner ear plate 301, an outer ear plate 302, a connecting plate 303, an inner reinforcing ring 304, and an outer reinforcing ring 305. The inner ear plate 301 is connected to the lower ear plate 102 through a connecting mechanism 4. The outer ear plate 302 is located outside the inner ear plate 301 and is connected to the wire rope casting joint 6 through the connecting mechanism 4. The connecting plate 303 is installed inside the inner ear plate 301 and the outer ear plate 302 to connect the inner ear plate 301 and the outer ear plate 302. The inner reinforcing ring 304 is installed inside the inner ear plate 301, and the outer reinforcing ring 305 is installed outside the outer ear plate 302.

[0044] It should be noted that the lower ear plate 102, the inner ear plate 301, and the outer ear plate 302 are all provided with through holes.

[0045] Please refer to the following for details. Figure 4 and Figure 5 The connecting mechanism 4 includes a connecting shaft 401, a slot 402 provided on the connecting shaft 401, and a locking plate 403. The connecting shaft 401 passes through the transition pull plate 3 and the lower ear plate 102 and is fixed by the slot 402 and the locking plate 403. The connecting shaft 401 passes through the transition pull plate 3 and the wire rope casting joint 6 and is fixed by the slot 402 and the locking plate 403. Specifically, when connecting the transition plate 3 and the distributor, first align the through hole of the lower ear plate 102 with the through hole of the inner ear plate 301, then insert the connecting shaft 401 slightly through the transition plate 3, and pass one end of the connecting shaft 401 through the other side of the transition plate 3. The slot 402 will also pass through the other side of the transition plate 3. At this time, the clamping plate 403 is engaged and tightened with screws to complete the connection between the transition plate 3 and the distributor. When connecting the transition plate 3 and the wire rope casting joint 6, first align the wire rope casting joint 6 and place it into the outer ear plate 302, then insert the connecting shaft 401 slightly through the transition plate 3, and pass one end of the connecting shaft 401 through the other side of the transition plate 3. The slot 402 will also pass through the other side of the transition plate 3. At this time, the clamping plate 403 is engaged and tightened with screws to complete the connection between the transition plate 3 and the wire rope casting joint 6.

[0046] In this embodiment, there are two card slots 402, which are respectively located on both sides of the same end of the connecting shaft 401. Correspondingly, there are also two card plates 403, which can be installed in the card slots 402.

[0047] This invention relates to a nuclear power plant sling distributor with a shaft puller and a transition plate. Its working principle is described in conjunction with the attached... Figures 6-8 illustrate: S1. First, pre-connect the upper ear plate 101 and the connector 5, then insert the connector 5 into the upper ear plate 101 and align the through holes of both. S2. Turning the handle forward will cause the handwheel 207 to rotate, which in turn will cause the lead screw 2042 to rotate, thereby driving the guide nut 2041 and the pin 203 to move laterally to the right. This will cause the pin 203 to extend out of the housing 201 and enter the through hole between the upper ear plate 101 and the connector 5, connecting the distributor and the connector 5 together. When it is necessary to remove the distributor and the connector 5, simply turn the handle in the opposite direction to completely separate the pin 203 from the upper ear plate 101 and the connector 5. S3. Next, align the wire rope casting joint 6 and insert it into the outer ear plate 302. Then, insert the connecting shaft 401 slightly through the transition plate 3. Pass one end of the connecting shaft 401 through the other side of the transition plate 3 and clamp the clamping plate 403 into the clamping groove 402. Secure the clamping plate 403 with screws to complete the connection between the transition plate 3 and the wire rope casting joint 6. When it is necessary to remove the transition plate 3 and the wire rope casting joint 6, simply loosen the screws and remove the clamping plate 403 and the connecting shaft 401. S4. Connect the other end of the wire rope to the safety vessel; S5. Start the crane to lift the containment vessel.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A nuclear power plant sling distributor with a shaft puller and a transition pull plate, comprising a distributor body (1) and a pin (203), wherein the distributor body (1) is provided with an upper ear plate (101) and a lower ear plate (102), and the pin (203) is used to connect the distributor and the connector (5), characterized in that: It also includes a shaft puller (2) for inserting and removing the pin (203); The shaft puller (2) includes a housing (201), a cover (202), and a transmission mechanism (204). The housing (201) is mounted on the upper ear plate (101) and located outside the upper ear plate (101). The cover (202) is mounted on one end of the housing (201). The pin (203) is mounted inside the housing (201) and can move inside the housing (201). The transmission mechanism (204) can drive the pin (203) to move inside the housing (201) to realize the insertion or removal of the pin (203), thereby achieving the purpose of connecting the distributor and the connector (5) or removing the distributor and the connector (5).

2. The nuclear power plant sling distributor with shaft puller and transition plate according to claim 1, characterized in that: The transmission mechanism (204) includes a guide nut (2041) and a lead screw (2042). The guide nut (2041) is installed in the pin (203) and is adapted to the lead screw (2042). The lead screw (2042) is installed on the cover (202) and can rotate relative to the cover (202). The lead screw (2042) passes through the cover (202) and enters the housing (201) and is threadedly connected to the guide nut (2041). By rotating the lead screw (2042), the guide nut (2041) can be driven to move, which in turn can drive the pin (203) to move within the housing (201). The pin (203) is provided with a shaft hole (2031), which extends laterally through the entire pin (203) and the diameter of the shaft hole (2031) is greater than or equal to the diameter of the lead screw (2042). The center of the shaft hole (2031) is on the same straight line as the center of the lead screw (2042) and the center of the guide nut (2041).

3. The nuclear power plant sling distributor with shaft puller and transition plate according to claim 2, characterized in that: The shaft puller (2) also includes a bearing housing (205) and a bearing (206). The bearing housing (205) is mounted on the cover (202), and the bearing (206) is mounted inside the bearing housing (205) with its inner ring in contact with the lead screw (2042).

4. The nuclear power plant sling distributor with shaft puller and transition plate according to claim 3, characterized in that: The bearing housing (205) is provided with two bearing mounting slots, and correspondingly, there are two bearings (206), which are respectively installed in the two bearing mounting slots.

5. The nuclear power plant sling distributor with shaft puller and transition plate according to claim 3, characterized in that: The shaft puller (2) also includes a handwheel (207), which is mounted on the lead screw (2042) and located outside the cover (202). The handwheel (207) is provided with a handle (2071).

6. The nuclear power plant sling distributor with shaft puller and transition plate according to claim 5, characterized in that: The shaft puller (2) also includes a dustproof ring (208), which is installed on the bearing housing (205) and located outside the bearing (206).

7. The nuclear power plant sling distributor with shaft puller and transition plate according to claim 6, characterized in that: The shaft puller (2) also includes a sleeve (209), which is sleeved on the lead screw (2042) and located between the handwheel (207) and the dustproof retaining ring (208).

8. The nuclear power plant sling distributor with shaft puller and transition plate according to any one of claims 1-7, characterized in that: It also includes a transition plate (3), which is used to connect the distributor and the wire rope. One end of the transition plate (3) is connected to the lower ear plate (102), and the other end is connected to the wire rope casting joint (6).

9. The nuclear power plant sling distributor with shaft puller and transition plate according to claim 8, characterized in that: The transition plate (3) includes an inner ear plate (301), an outer ear plate (302), a connecting plate (303), an inner reinforcing ring (304), and an outer reinforcing ring (305). The inner ear plate (301) is connected to the lower ear plate (102) through a connecting mechanism (4). The outer ear plate (302) is connected to the wire rope casting joint (6) through a connecting mechanism (4). The connecting plate (303) is installed inside the inner ear plate (301) and the outer ear plate (302) to connect the inner ear plate (301) and the outer ear plate (302). The inner reinforcing ring (304) is installed inside the inner ear plate (301), and the outer reinforcing ring (305) is installed outside the outer ear plate (302).

10. The nuclear power plant sling distributor with shaft puller and transition plate according to claim 9, characterized in that: The connecting mechanism (4) includes a connecting shaft (401), a slot (402) provided on the connecting shaft (401), and a locking plate (403). The connecting shaft (401) passes through the transition pull plate (3) and the lower ear plate (102), and is fixed by the slot (402) and the locking plate (403). The connecting shaft (401) passes through the transition pull plate (3) and the wire rope casting joint (6), and is fixed by the slot (402) and the locking plate (403).

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