Unlocking and grabbing tool for spent moving body of sodium-cooled fast reactor

Abstract

The utility model belongs to the technical field of unlocking and grabbing of a spent moving body of a sodium-cooled fast reactor, and particularly relates to an unlocking and grabbing tool for the spent moving body of the sodium-cooled fast reactor. The device comprises an outer sleeve, an inner sleeve is arranged on the inner side of the lower section of the outer sleeve, a connecting rod C is arranged in the outer sleeve, and an end is arranged at the lower end of the outer sleeve and connected with a gripper through a pin D; the lower section of the connecting rod C is arranged in the inner sleeve, the upper end of the connecting rod C is connected with the lower end of the connecting rod B through a nut B, the lower end of the connecting rod C is connected with the star wheel through a pin B, and the connecting rod C reciprocates to open and close the gripper; ejector pins, springs and push rods are sequentially arranged at the lower ends of the star wheels; the lower end of the push rod is in threaded fit with the inner sleeve. According to the device, the vacancy of lack of tools for unlocking the combination of the moving body and the tool sleeve and transferring the moving body in the prior art is filled. When the device is used during the overhaul period of a nuclear power plant, the control rod assembly split transfer can be smoothly carried out.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sodium cooling fast reactor mobile body unlocking and grabbing technical field, concretely relates to a kind of sodium cooling fast reactor mobile body unlocking and grabbing tool. BACKGROUND

[0002] Sodium cooling demonstration fast reactor control rod assembly is split structure, is composed of mobile body and outer sleeve.Sodium cooling fast reactor overhaul needs to disassemble control rod assembly and transport, since mobile body and tool sleeve combination operation requirement and process characteristics, fast reactor existing tool cannot meet the demand of mobile body and tool sleeve combination unlocking and mobile body transfer, to guarantee the smooth progress of control rod assembly transport work, design a kind of sodium cooling fast reactor mobile body unlocking and grabbing tool, realize the unlocking between mobile body and tool sleeve and the transfer of mobile body. SUMMARY

[0003] The utility model provides a kind of sodium cooling fast reactor mobile body unlocking and grabbing tool, to solve the problem of lack of tool for mobile body and tool sleeve combination unlocking and mobile body transfer in prior art.

[0004] The technical scheme of the utility model:

[0005] The utility model provides a kind of sodium cooling fast reactor mobile body unlocking and grabbing tool, the tool includes connecting rod B, connecting rod C, outer sleeve, inner sleeve, star wheel, grab head, thimble, spring, end head and push rod;Inner sleeve is equipped in the inner side of outer sleeve lower section position, connecting rod C is equipped in outer sleeve, end head is equipped in the lower end of outer sleeve, end head is connected grab head by pin D, the outer diameter of grab head is 130mm, the edge of mobile body is grabbed by grab head, and the mobile body is individually transported and grabbed;The lower section of connecting rod C is arranged in inner sleeve, the lower end of connecting rod C is connected with star wheel by pin B, connecting rod C is reciprocated to realize the opening and closure of grab head;Thimble, spring and push rod are sequentially arranged in the lower end of star wheel;The upper end of push rod is threadedly connected with the bottom of inner sleeve.

[0006] In some embodiments, the tool weight is 530kg, and the tool weight provides the unlocking pressure of mobile body and tool sleeve assembly.

[0007] In some embodiments, the upper section of connecting rod B is connected with lifting ring B by shaft shoulder screw, connecting rod B is connected with the lower end of connecting plug by pin in the upper end, the upper end of connecting plug is connected with connecting rod A by pin C, lifting ring connecting plate is arranged in the upper section of connecting rod A, and lifting ring connecting plate is connected with lifting ring A by nut A.

[0008] In some embodiments, the star wheel is connected to the spring piece by a screw, and a stop pin is provided on the star wheel. The stop pin and the spring piece are used to maintain the angle of the star wheel after each flip, thereby realizing self-locking of the tool.

[0009] In some embodiments, a groove A is provided in the middle of the outer sleeve, a groove B is provided at the lower portion of the connecting rod, and the tool is further provided with a steel ball, which is provided at the upper portion of the inner sleeve. When the connecting rod C reciprocates, the steel ball switches positions between groove A and groove B, thereby realizing self-locking of the tool.

[0010] In some embodiments, the inner side of the upper end of the outer sleeve is connected to the end cover through a pin A, and the end cover is used for axial positioning of the tool; the lower end of the inner sleeve is provided with a guide pin B, and the guide pin B is used for axial positioning of the inner sleeve.

[0011] In some embodiments, a guide pin A is provided at the middle section of the connecting rod C, and the guide pin A is used for axial positioning of the connecting rod C.

[0012] In some embodiments, the tool is stored in a storage rack that is bolted to the surface of the spent fuel storage pool. The tool is provided with a matching long-handled tool for auxiliary operation and positioning.

[0013] Beneficial effects of the utility model:

[0014] This utility model proposes a tool for unlocking and gripping the spent moving body of a sodium-cooled fast reactor. This tool uses the outer sleeve head to press against the outer edge of the tool sleeve, unlocking the spent moving body and the tool sleeve by the tool's own weight. Simultaneously, the tool locks the spent moving body with a gripper, enabling the moving body to be transported with the cooperation of a crane. This tool fills the gap in the existing technology for unlocking and transporting the spent moving body and tool sleeve combination. Used during nuclear power plant overhauls, this tool ensures the smooth transfer of the control rod assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the extended state of the connecting rod C of the unlocking and grabbing tool for the spent mobile body of a sodium-cooled fast reactor proposed in the present invention;

[0016] Figure 2 This is a schematic diagram of the retracted state of the connecting rod C of the unlocking and grabbing tool for the spent mobile body of a sodium-cooled fast reactor proposed in the present invention;

[0017] Figure 3 for Figure 2 Schematic diagram of the cross section at AA;

[0018] Figure 4 This is a schematic diagram of a storage rack a for unlocking and grabbing tools for a spent mobile body of a sodium-cooled fast reactor proposed in the present invention;

[0019] Figure 5The utility model provides a long handle tool schematic drawing of sodium cooled fast reactor mobile body unlocking and grabbing tool.

[0020] Figure 6 The utility model provides a long handle tool schematic drawing of sodium cooled fast reactor mobile body unlocking and grabbing tool.

[0021] Figure 7 The utility model provides a long handle tool schematic drawing of sodium cooled fast reactor mobile body unlocking and grabbing tool.

[0022] ATTACHMENT DESCRIPTION: 1, nut A;2, bolt;3, shaft shoulder screw;4, pin A;5, guide pin A;6, star wheel;7, pin B;8, guide pin B;9, ring A;10, ring connecting plate;11, connecting rod A;12, ring B;13, pin C;14, connecting plug;15, connecting rod B;16, nut B;17, connecting rod C;18, end cover;19, outer sleeve;20, steel ball;21, inner sleeve;22, thimble;23, spring;24, push rod;25, end;26, pin D;27, grab head;28, screw;29, elastic sheet;30, stop pin;31, storage rack;32, long handle tool;33, recess A;34, recess B. DETAILED DESCRIPTION

[0023] The utility model will be explained in detail below in combination with the drawings and examples.

[0024] As Figures 1 to 7 The utility model discloses a kind of sodium cooled fast reactor mobile body unlocking and grabbing tool, which includes connecting rod B15, connecting rod C17, outer sleeve 19, inner sleeve 21, star wheel 6, grab head 27, thimble 22, spring 23, end 25 and push rod 24;The inner sleeve 21 is equipped in the inner side of outer sleeve 19 lower section position, connecting rod C17 is equipped in the inner sleeve 21 upper section, end 25 is equipped in the lower end of outer sleeve 19, end 25 is connected grab head 27 by pin D 26.It needs to be explained, the lower end of this tool is equipped with grab head 27, and the upper end of this tool is equipped with connecting rod C17.

[0025] The outer sleeve 19 is connected with the end cover 18 through the pin A4 at the inner side of the upper end of the outer sleeve 19, and the end cover 18 is used for axial positioning of the tool; the lower end of the inner sleeve 21 is provided with the guide pin B8, and the guide pin B8 is used for axial positioning of the inner sleeve 21. The guide pin A5 is arranged at the middle position of the connecting rod C17, and the guide pin A5 is used for axial positioning of the connecting rod C17; the lower segment of the connecting rod C17 is arranged inside the inner sleeve 21, the upper end of the connecting rod C17 is connected with the lower end of the connecting rod B15 through the nut B16, the lower end of the connecting rod C17 is connected with the star-shaped wheel 6 through the pin B7, and the connecting rod C17 performs reciprocating movement to realize opening and closing of the grab head 27; the star-shaped wheel 6 is sequentially provided with the thimble 22, the spring 23 and the push rod 24 from top to bottom at the lower end of the star-shaped wheel 6; the upper end of the push rod 24 is threadedly connected with the bottom of the inner sleeve 21. The star-shaped wheel 6 is connected with the elastic sheet 29 through the screw 28, and the star-shaped wheel 6 is provided with the stop pin 30; the stop pin 30 and the elastic sheet 29 are used for keeping the angle of the star-shaped wheel 6 after each turning, so that the tool is self-locked.

[0026] In some embodiments, the outer diameter of the grab head 27 is 130 mm, the grab head 27 is used for grabbing the edge of the spent mobile body, and the spent mobile body is individually transported and grabbed. The weight of the tool is 530 kg, and the weight of the tool provides the unlocking pressure of the spent mobile body and the tool sleeve assembly. The tool presses the outer edge of the tool sleeve through the head of the outer sleeve 19, relies on the weight of the tool to press the upper part of the tool sleeve open, realizes the unlocking of the spent mobile body and the tool sleeve, and after the unlocking is completed, the tool makes the grab head 27 locked through the movement of the star-shaped wheel 6 and the ball, and realizes the transportation of the spent mobile body under the cooperation of the crane.

[0027] In some embodiments, the upper segment of the connecting rod B15 is connected with the lifting ring B12 through the shaft shoulder screw 3, the connecting rod B15 is connected with the lower end of the connecting plug 14 through the upper end and the plug pin 2, the upper end of the connecting plug 14 is connected with the connecting rod A11 through the pin C13, and the upper segment of the connecting rod A11 is provided with the lifting ring connecting plate 10, and the lifting ring connecting plate 10 is connected with the lifting ring A9 through the nut A1. The tool can split the upper half of the tool through the connecting plug 14, and the size of the tool can be selected according to actual needs.

[0028] In some embodiments, the outer sleeve 19 is provided with the groove A33 at the middle position, the lower segment of the connecting rod is provided with the groove B34, the tool is further provided with the steel ball 20, the steel ball 20 is arranged at the upper segment of the inner sleeve 21, the steel ball 20 switches positions between the groove A33 and the groove B34 during the reciprocating movement of the connecting rod C17, and the self-locking of the tool is realized.

[0029] In some embodiments, the tool is stored in the storage rack 31, and the storage rack 31 is connected with the ground of the spent fuel storage pool through bolts. The tool is provided with the long handle tool 32 which is used for auxiliary operation and positioning of the tool.

[0030] The utility model provides a kind of sodium-cooled fast reactor mobile body unlocking grabbing tool, the specific method for grabbing mobile body of the utility model is as follows:

[0031] As shown in Figures 1 to 7 The crane hoists the tool to the mobile body and tool sleeve combination, and the end 25 of the tool falls on the petal of the tool sleeve, and the unlocking of the mobile body and tool sleeve combination is completed by the gravity of the tool. At this time, the outer sleeve 19 stops falling, the connecting rod C17 continues to fall in the outer sleeve 19, falls to the bottom of the outer sleeve 19, and the inner sleeve 21 top pin 22 collides with the star wheel 6 at the tail end of the connecting rod C17, so that the star wheel 6 is deflected by a certain angle. At this time, the crane lifts the tool, the star wheel 6 is clamped in the opening of the inner sleeve 21, the steel ball 20 enters the connecting rod C17 groove B34, and the self-locking of the connecting rod C17 and the inner sleeve 21 is realized. At this time, the crane continues to lift the tool, the connecting rod C17 drives the inner sleeve 21 to rise, the push rod 24 leaves the middle protruding point of the grab head 27, the grab head 27 is closed and locks the mobile body, and the tool completes the grabbing of the mobile body.

[0032] The above embodiments of the utility model are described in detail, and the utility model is not limited to the above examples. Within the knowledge range of ordinary skilled persons in the art, various changes can be made without departing from the purpose of the utility model.

Claims

1. A sodium-cooled fast reactor spent moving body unlocking and grabbing tool, characterized in that: The tool includes a connecting rod B, a connecting rod C, an outer sleeve, an inner sleeve, a star wheel, a grab head, a thimble, a spring, an end head and a push rod. The inner sleeve is provided on the inner side of the lower section of the outer sleeve, and a connecting rod C is provided inside the outer sleeve. The lower end of the outer sleeve is provided with an end head, which is connected to the grab head through a pin D. The outer diameter of the grab head is 130 mm. The grab head grabs the edge of the exhausted mobile body and transports and grabs the exhausted mobile body separately; the lower section of the connecting rod C is provided inside the inner sleeve, and the upper end of the connecting rod C is connected to the lower end of the connecting rod B through the nut B. The lower end of the connecting rod C is connected to the star wheel through a pin B, and the connecting rod C performs reciprocating motion to realize the opening and closing of the grab head; the lower end of the star wheel is provided with the thimble, the spring and the push rod in sequence from top to bottom; the upper end of the push rod is threadedly matched with the bottom of the inner sleeve.

2. The sodium-cooled fast reactor spent moving body unlocking and grabbing tool according to claim 1, characterized in that: The tool weighs 530 kg, which provides the unlocking pressure for the moving body and tool sleeve assembly.

3. The unlocking and grabbing tool for a sodium-cooled fast reactor spent moving body according to claim 2, characterized in that: The upper section of the connecting rod B is connected to the lifting ring B through a shoulder screw. The upper end of the connecting rod B is connected to the lower end of the connecting plug through a pin. The upper end of the connecting plug is connected to the connecting rod A through a pin C. The upper section of the connecting rod A is provided with a lifting ring connecting plate, and the lifting ring connecting plate is connected to the lifting ring A through a nut A.

4. The sodium-cooled fast reactor spent moving body unlocking and grabbing tool according to claim 3, characterized in that: The star wheel is connected to the spring piece by a screw, and a stop pin is provided on the star wheel. The stop pin and the spring piece are used to maintain the angle of the star wheel after each flip, thereby realizing self-locking of the tool.

5. The sodium-cooled fast reactor spent moving body unlocking and grabbing tool according to claim 4, characterized in that: The outer sleeve has a groove A in the middle, the connecting rod has a groove B in the lower part, and the tool is further provided with a steel ball, which is located in the upper part of the inner sleeve. When the connecting rod C reciprocates, the steel ball switches positions between groove A and groove B, thereby realizing self-locking of the tool.

6. The sodium-cooled fast reactor spent moving body unlocking and grabbing tool according to claim 5, characterized in that: The inner side of the upper end of the outer sleeve is connected to the end cover through a pin A, and the end cover is used for axial positioning of the tool; the lower end of the inner sleeve is provided with a guide pin B, and the guide pin B is used for axial positioning of the inner sleeve.

7. The unlocking and grabbing tool for a sodium-cooled fast reactor spent moving body according to claim 6, characterized in that: A guide pin A is provided at the middle section of the connecting rod C, and the guide pin A is used for axial positioning of the connecting rod C.

8. The unlocking and grabbing tool for a sodium-cooled fast reactor spent moving body according to claim 7, characterized in that: The tool is stored in a storage rack, which is connected to the ground of the spent fuel storage pool via expansion bolts. The tool is provided with a matching long-handled tool, which is used for auxiliary operation and positioning of the tool.

Images