Spent fuel charging device with emergency function

Abstract

The invention discloses a spent fuel loading device with an emergency function, and relates to the field of high-temperature gas cooled reactor loading and unloading, the spent fuel loading device with the emergency function comprises a main frame, a driving assembly and a loading tank, a welding process is adopted for joints on the main frame, and opening and closing of a loading tank cover are controlled through the driving assembly; and then the fuel is loaded and unloaded from the charging tank. The main frame is fixedly installed between a maintenance room floor and an operation room floor, is used as a mechanism foundation and comprises guide rails arranged on the surface of the main frame, the guide rails extend from top to bottom on the two sides of the main frame, an operation opening is formed in the maintenance room floor, and a movable opening is formed in the operation room floor. The driving assembly comprises a power piece arranged at the top of the main frame, a telescopic piece detachably connected with the power piece and a locking piece fixedly installed on the telescopic piece, the telescopic piece slides on the guide rail, and loading can be effectively achieved through a manual emergency means when a motor of the lifting mechanism breaks down.

Description

Technical Field

[0001] The invention relates to the technical field of high temperature gas-cooled reactor loading and unloading, in particular to a spent fuel loading device with emergency function. Background Art

[0002] The spent fuel loading device is an important equipment of the high temperature gas-cooled reactor. Its main function is to load the spent fuel balls discharged from the core into the spent fuel storage tank according to the instructions. During normal operation, the spent fuel loading device is in a strong radioactive environment. Therefore, designing a loading device with rapid emergency maintenance is of great significance to ensure the safe and stable operation of the system and the safety of maintenance personnel.

[0003] In view of the above problems, the present invention proposes a spent fuel loading device for emergency maintenance of high temperature gas-cooled reactors. The device can effectively reduce the radiation impact caused by the bottom spent fuel storage tank, allowing personnel to approach the drive motor for maintenance work, and solves the problem that the spent fuel loading device cannot be lifted when the lifting mechanism motor fails. Summary of the invention

[0004] In view of the problems existing in the above-mentioned spent fuel loading device with emergency function, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to prevent pipeline leakage.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A spent fuel loading device with emergency function, comprising a main frame, the main frame is fixedly installed between the maintenance room floor and the operation room floor, and is used as a mechanism foundation, including guide rails arranged on the surface of the main frame, the guide rails extend from top to bottom on both sides of the main frame, the maintenance room floor is provided with an operation port, and the operation room floor is provided with a movable port;

[0007] A driving assembly, comprising a power member disposed on the top of the main frame, a telescopic member detachably connected to the power member, and a locking member fixedly mounted on the telescopic member, wherein the telescopic member slides on the guide rail;

[0008] A charging tank, the center of which is provided with a material taking port that matches the diameter of the telescopic member, and a charging tank cover that is arranged on the material taking port and can be taken out, and the material taking port is higher than the surface of the charging tank;

[0009] The charging tank is arranged below the floor of the operation room, and the telescopic member can pass through the movable opening on the floor of the operation room to reach the material taking opening on the charging tank.

[0010] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, a feed pipe extending from top to bottom is also provided at the end of the main frame, a buffer tube is provided at the other end of the feed pipe extending to the direction of the telescopic part, a shock absorber is also provided below the guide rail, and a pair of limit piles are respectively provided on both sides of two different heights of the guide rail.

[0011] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, the power part includes a motor fixedly mounted on the main frame, a worm controlled by the motor through a coupling, and a worm wheel matched with the worm, a sprocket coaxially rotating through a transmission shaft is also provided on one side of the worm wheel, one end of the ring chain on the sprocket hangs downward, and an operating head matched with a square rod operated by a staff is provided at the end of the worm.

[0012] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, the telescopic member includes a mounting frame slidably matched with the guide rail, the mounting frame is provided with an outer sleeve extending all the way to the interior of the charging tank, a first bifurcated tube is provided on one side of the outer sleeve and is connected with the buffer tube, a second bifurcated tube is provided on the same side of the first bifurcated tube, a screw cap is provided on the second bifurcated tube, and a movable sleeve is fixedly installed on the surface of the outer sleeve.

[0013] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, the telescopic member also includes a piston arranged inside the outer sleeve, the top of the piston is fixedly connected to the ring chain, the other end of the piston is fixedly connected to a claw through a connecting rod, and the claw is self-lockingly matched with the charging tank cover.

[0014] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, the telescopic member also includes an auxiliary rod arranged on the shielding pipe and fixedly installed on the shielding pipe, one end of the auxiliary rod is fixedly connected to the shielding pipe, and the other end extends toward the movable sleeve and slidably cooperates with the movable sleeve.

[0015] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, wherein: the locking member includes a fixing seat fixedly mounted on both sides of the mounting frame, a cylinder is fixedly mounted on the fixing seat, a piston rod of the cylinder is connected to a locking plate through a pin, a screw bracket is provided at the tail of the cylinder, a screw is installed on the screw bracket, the piston rod at the end of the cylinder is connected to the screw through an unlocking connecting rod, the unlocking connecting rod has a long notch, and the piston rod of the cylinder can move freely.

[0016] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, a slot cooperating with the limit pile is provided on the end of the locking plate.

[0017] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, the locking member further comprises anti-falling piles arranged on both sides of the guide rail, and a plurality of anti-falling grooves are arranged on the anti-falling piles.

[0018] As a preferred solution of the spent fuel loading device with emergency function described in the present invention, wherein: the locking piece also includes a protective box fixedly connected to the mounting frame, a spring outlet is provided on the side of the protective box facing the anti-fall pile, the protective box also includes an induction pile fixedly connected to the inner wall of the box body through a first spring, a clamping plate is provided at the end of the induction pile, a movable groove is provided on the clamping plate, the protective box also includes an elastic pile sliding in the movable groove, one end of the elastic pile is fixedly connected to the inner wall of the protective box through a compression spring, and the other end is embedded in the anti-fall groove.

[0019] The beneficial effects of the present invention are as follows: through the coordination of various components, it is effectively realized that loading can be carried out through manual emergency means when the lifting mechanism motor fails, avoiding that the radioactive fuel is always in a stagnant state due to the motor failure, reducing safety accidents in a convenient and fast way, and effectively realizing rapid braking when a stall state occurs due to an operating error, thereby greatly improving the safety index. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0021] Figure 1 This is a scene diagram of the spent fuel loading device with emergency functions.

[0022] Figure 2 This is an enlarged view of location W of the spent fuel loading device with emergency function.

[0023] Figure 3 This is a partial enlarged view of the spent fuel loading device with emergency function.

[0024] Figure 4 A partial cross-sectional view of a spent fuel loading device with emergency functions.

[0025] Figure 5This is an enlarged view of the V part of the spent fuel loading device with emergency function.

[0026] Figure 6 This is an enlarged view of location M of the spent fuel loading device with emergency function.

[0027] Figure 7 This is a structural diagram of the power components of a spent fuel loading device with emergency functions.

[0028] Figure 8 This is a structural diagram of the telescopic parts of the spent fuel loading device with emergency function.

[0029] Fig. 9 This is a structural diagram of the locking parts of the spent fuel loading device with emergency function.

[0030] Fig.10 This is a diagram of the internal structure of the protective box of the spent fuel loading device with emergency function. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are explained to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that can be included in at least one implementation of the present invention. The phrase "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, and this embodiment provides a spent fuel loading device with emergency function. The spent fuel loading device with emergency function includes a main frame 100, a driving assembly 200 and a loading tank 300. The joints on the main frame 100 are all welded. The driving assembly 200 is used to control the opening and closing of the loading tank cover 301, and then the fuel is loaded and unloaded from the loading tank 300.

[0036] Specifically, the main frame 100 is fixedly installed between the maintenance room floor H and the operation room floor P, and is used as the foundation of the mechanism, including a guide rail 101 arranged on the surface of the main frame 100, and the guide rail 101 extends from top to bottom on both sides of the main frame 100. An operation port A is provided on the maintenance room floor H, and a movable port B is provided on the operation room floor P. When a motor fails, the staff can control the movement of the worm 201c through a long rod tool at the operation port A of the maintenance room floor H, and the protection requirements are met for both the maintenance room floor H and the operation room floor P.

[0037] Preferably, the driving assembly 200 includes a power member 201 arranged on the top of the main frame 100, a telescopic member 202 detachably connected to the power member 201, and a locking member 203 fixedly mounted on the telescopic member 202. The telescopic member 202 slides on the guide rail 101. The detachable connection with the power member 201 mentioned here refers to the connection between the ring chain 201f-1 in the power member 201 and the end of the piston 202c, and the telescopic member 202 as a whole slides on the guide rail 101.

[0038] Preferably, the charging tank 300 is provided at its center with a material taking port G matching the diameter of the telescopic member 202 , and a charging tank cover 301 disposed at the material taking port G and capable of being taken out, and the material taking port G is higher than the surface of the charging tank 300 .

[0039] Preferably, the loading tank 300 is disposed below the floor P of the operation room, and the telescopic member 202 can pass through the movable opening B on the floor P of the operation room to reach the material taking opening G on the loading tank 300 .

[0040] During use, when the motor fails, the staff will first release the limit on the drive assembly 200, and then control the opening and closing of the charging tank cover 301 by driving the worm 201c. After clamping the charging tank cover 301, loading is carried out through the first forked pipe 202b-1. After loading is completed, the charging tank cover 301 can be closed, and then the worm 201c is controlled to restore the parts to their original positions, and the motor maintenance can be started.

[0041] Example 2

[0042] Reference Figures 2 to 9 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0043] Specifically, a feed pipe 102 extending from top to bottom is further provided at the end of the main frame 100, and a buffer pipe 103 is provided on the other end of the feed pipe 102 extending to the direction of the telescopic member 202. A shock absorber 104 is further provided below the guide rail 101, and a pair of limit piles 105 are respectively provided on both sides of two different heights of the guide rail 101. The buffer pipe 103 is provided to buffer the impact force of the spent fuel ball falling, so that the spent fuel ball can enter the charging tank 300 slowly. The two pairs of limit piles 105 are respectively provided at two positions, one high and one low. In the initial state, the telescopic member 202 and the high-position limit pile 105 are in a locked state, and after the telescopic member 202 contacts the shock absorber 104, the power member 201 stops operating, and the telescopic member 202 and the low-position limit pile 105 are in a locked state. A copper sleeve and a sealing ring are provided at the connection between the feed pipe 102 and the buffer pipe 10 for lubrication and sealing.

[0044] Preferably, the power component 201 includes a motor 201a fixedly mounted on the main frame 100, a worm 201c controlled by the motor 201a through a coupling 201b, and a worm wheel 201d cooperating with the worm 201c. A sprocket 201f coaxially rotating through a transmission shaft 201e is also provided on one side of the worm wheel 201d. One end of a ring chain 201f-1 on the sprocket 201f hangs downward, and an operating head 201c-1 cooperating with a square rod operated by a staff member is provided at the end of the worm 201c. There is a self-locking function between the worm 201c and the worm wheel 201d, and ring chain restrictions are provided on both sides of the sprocket 201f to ensure that the ring chain 201f-1 does not fall off.

[0045] Preferably, the telescopic member 202 includes a mounting frame 202a that slides with the guide rail 101, and an outer sleeve 202b extending all the way to the interior of the charging tank 300 is provided on the mounting frame 202a, and a first bifurcated tube 202b-1 is provided on one side of the outer sleeve 202b, and is connected with the buffer tube 103, and a second bifurcated tube 202b-2 is provided on the same side of the first bifurcated tube 202b-1, and a screw cover 202b-3 is provided on the second bifurcated tube 202b-2, and a movable sleeve 202b-4 is fixedly installed on the surface of the outer sleeve 202b, and the first bifurcated tube 202b-1 serves as an inlet for spent fuel balls, and the second bifurcated tube 202b-2 is used to open the door and take out the balls when the downstream pipeline is blocked.

[0046] Preferably, the telescopic member 202 also includes a piston 202c arranged inside the outer sleeve 202b, the top of the piston 202c is fixedly connected to the ring chain 201f-1, and the other end of the piston 202c is fixedly connected to the claw 202d through the connecting rod L, and the claw 202d and the charging tank cover 301 are self-lockingly matched.

[0047] Preferably, the telescopic member 202 also includes an auxiliary rod 202e-1 arranged on the shielding pipe 202e and fixedly installed on the shielding pipe 202e, one end of the auxiliary rod 202e-1 is fixedly connected to the shielding pipe 202e, and the other end extends toward the movable sleeve 202b-4 and slidably cooperates with the movable sleeve 202b-4.

[0048] Preferably, the locking member 203 includes a fixing seat 203a fixedly mounted on the mounting frame 202a, a cylinder 203b is fixedly mounted on the fixing seat 203a, the piston rod of the cylinder 203b is connected to the locking plate 203d through a pin 203c, a screw bracket 203e is provided at the tail of the cylinder 203b, a screw 203e-1 is installed on the screw bracket 203e, the piston rod at the end of the cylinder 203b is connected to the screw 203e-1 through an unlocking connecting rod 203e-2, the unlocking connecting rod 203e-2 has a long notch, the piston rod of the cylinder 203b can move freely, the cylinder 203b is a double-acting double-rod cylinder, the locking plate 203d slides on the slide groove of the fixing seat 203a, when the cylinder 203b fails, the screw 203e-1 can be screwed to drive the piston rod of the cylinder 203b to move.

[0049] Preferably, a slot 203d-1 is provided at the end of the locking plate 203d, which cooperates with the limiting pile 105. Three sets of locking members 203 are provided, two of which are fixedly installed on both sides of the mounting frame 202a to locate the lifting position, and the other set of locking members 203d is provided on the side where the piston 202c is connected to the chain 201f-1, to limit and fix the piston 202c.

[0050] When in use, when the motor fails, the staff first turns the screw 203e-1 to drive the piston rod of the cylinder 203b to move, so that the locking plate 203d slides on the slide groove of the fixed seat 203a, and then the locking state between the locking plate 203d and the high-position limit pile 105 is released, and the worm 201c is driven to rotate by the long rod tool, and then the worm wheel 201d is driven to rotate, so that the sprocket 201f starts to drive the ring chain 201f-1 to descend, and the mounting frame 202a slides on the guide rail 101. When the mounting frame 202a contacts the shock absorber 104, it stops rotating. When the shielding pipe 202e is in place and supported, the auxiliary rod 202e-1 can slide on the movable sleeve 202b-4, which mainly plays a role in preventing leakage and strengthening sealing. At this time, the locking plate 203d also just falls to the low-position limit pile 105, and the screw 20 3e-1, so that the locking plate 203d and the limiting pile 105 reach a limiting state. Because the locking plate 203d used to limit and fix the piston 202c has not been unlocked before, when the mounting frame 202a descends, the piston 202c is still at the end of the outer sleeve 202b. After the locking plate 203d is fixed to the low-position limiting pile 105, the locking of the piston 202c and the locking plate 203d is released. At this time, the worm 201c is continued to be driven until the claw 202d contacts the charging tank cover 301 to achieve self-locking and clamp the charging tank cover 301. At this time, the worm 201c is reversed to make the chain 201f-1 rise, drive the charging tank cover 301 to be opened, and continuously drive the chain 201f-1 to rise until the charging tank cover 301 is higher than the entrance of the first bifurcated pipe 202b-1. At this time, the spent fuel balls can be loaded from the feeding pipe 102;

[0051] After the loading is completed, the worm 201c is controlled to drive the chain 201f-1 to descend, so that the charging tank cover 301 closes the charging tank 300 again. At this time, the claw 202d is separated from the charging tank cover 301, and the chain 201f-1 rises until the piston 202c reaches the position locked with the locking plate 203d. The screw 203e-1 is turned to make the locking plate 203d and the piston 202c reach a limited state, and the fixing state of the locking plates 203d on both sides and the low-position limit piles 105 is released. The chain 201f-1 continues to rise until the locking plate 203d reaches the high-position limit pile 105 and is locked at this time. Repeat the above steps to achieve multiple loadings.

[0052] It should be noted that the opening and closing of the clamping claw 202d used by us is controlled by pneumatic means, and the operation of opening and closing the clamping claw is completed by the pneumatic clamping claw 202d. The cylinder of the clamping claw 202d releases pressure and deflates air when the clamping claw 202d needs to be opened, and is filled with high-pressure gas when the clamping claw 202d needs to be closed, which can ensure that the clamping claw has the inherent safety feature of opening when power is off (deflation) after grabbing the can cover.

[0053] Example 3

[0054] Reference Fig.10 , which is the third embodiment of the present invention, and is based on the first two embodiments.

[0055] Specifically, the protective member 204 includes anti-falling piles 204a arranged on both sides of the guide rail 101, and a plurality of anti-falling grooves 204a-1 are arranged on the anti-falling piles 204a.

[0056] Preferably, the locking member 203 also includes a protective box 204b fixedly connected to the mounting frame 202a, and a spring outlet 204b-1 is provided on the side of the protective box 204b facing the anti-fall pile 204a. The protective box 204b also includes an induction pile 204b-3 fixedly connected to the inner wall of the box body through a first spring 204b-2, and a clamping plate 204b-4 is provided at the end of the induction pile 204b-3, and a movable groove 204b-5 is provided on the clamping plate 204b-4. The protective box 204b also includes an elastic pile 204b-6 sliding in the movable groove 204b-5, and one end of the elastic pile 204b-6 is fixedly connected to the inner wall of the protective box 204b through a compression spring 204b-7, and the other end is embedded in the anti-fall groove 204a-1.

[0057] During use, due to the possible self-locking failure between the worm 201c and the worm wheel 201d, the loading device in operation may stall. At this time, the induction pile 204b-3 inside the protective box 204b is affected by the inertia of the rapid fall and will move upward, and then move the card plate 204b-4 upward. Since the compression spring 204b-7 on the other end of the elastic pile 204b-6 is always in a compressed state, when the card plate 204b-4 moves to the elastic pile 204b-6 and the ejection outlet 204b-1 and the moving groove 204b-5 are in a horizontal position, the compression spring 204b-7 will rebound to its original position, causing the elastic pile 204b-6 to pop out and embed into the anti-fall groove 204a-1. At this time, the mounting frame 202a can be prevented from continuing to fall, and the staff can then carry out maintenance. During the maintenance process, some components will be restored to their initial state.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A spent fuel loading device with emergency function, Features: include, A main frame (100), the main frame (100) is fixedly installed between the maintenance room floor (H) and the operation room floor (P), and is used as a mechanism foundation, including a guide rail (101) arranged on the surface of the main frame (100), the guide rail (101) extending from top to bottom on both sides of the main frame (100), an operation opening (A) is arranged on the maintenance room floor (H), and a movable opening (B) is arranged on the operation room floor (P); A driving assembly (200) comprises a power member (201) arranged on the top of the main frame (100), a telescopic member (202) detachably connected to the power member (201), a locking member (203) fixedly mounted on the telescopic member (202), and a protective member (204), wherein the telescopic member (202) slides on the guide rail (101), and the protective member (204) is used for emergency braking in a stalled state; A charging tank (300) having a material taking port (G) at the center thereof that matches the diameter of the telescopic member (202), and a charging tank cover (301) that is arranged at the material taking port (G) and can be taken out, wherein the material taking port (G) is higher than the surface of the charging tank (300); The loading tank (300) is arranged below the operating room floor (P), and the telescopic member (202) can pass through the movable opening (B) on the operating room floor (P) to reach the material taking opening (G) on the loading tank (300).

2. The spent fuel loading device with emergency function as claimed in claim 1, Features: A feed pipe (102) extending from top to bottom is also provided at the end of the main frame (100); a buffer pipe (103) is provided at the other end of the feed pipe (102) extending in the direction of the telescopic member (202); a shock absorber (104) is also provided below the guide rail (101); and a pair of limit piles (105) are respectively provided on both sides of two different heights of the guide rail (101).

3. The spent fuel loading device with emergency function as claimed in claim 2, Features: The power component (201) comprises a motor (201a) fixedly mounted on the main frame (100), a worm (201c) controlled by the motor (201a) via a coupling (201b), and a worm wheel (201d) matched with the worm (201c); a sprocket (201f) coaxially rotating via a transmission shaft (201e) is further provided on one side of the worm wheel (201d); one end of a ring chain (201f-1) on the sprocket (201f) hangs downward; and an operating head (201c-1) matched with a square rod operated by a staff member is provided at the end of the worm (201c).

4. The spent fuel loading device with emergency function as claimed in claim 3, Features: The telescopic member (202) includes a mounting frame (202a) that is slidably matched with the guide rail (101); an outer sleeve (202b) that extends all the way to the interior of the charging tank (300) is provided on the mounting frame (202a); a first bifurcated tube (202b-1) is provided on one side of the outer sleeve (202b) and is connected to the buffer tube (103); a second bifurcated tube (202b-2) is provided on the same side of the first bifurcated tube (202b-1); a rotary cover (202b-3) is provided on the second bifurcated tube (202b-2); and a movable sleeve (202b-4) is fixedly installed on the surface of the outer sleeve (202b).

5. The spent fuel loading device with emergency function as claimed in claim 4, Features: The telescopic member (202) further comprises a piston (202c) disposed inside the outer sleeve (202b), the top of the piston (202c) being fixedly connected to the ring chain (201f-1), the other end of the piston (202c) being fixedly connected to a claw (202d) via a connecting rod (L), and the claw (202d) and the charging tank cover (301) being self-lockingly matched.

6. The spent fuel loading device with emergency function as claimed in claim 5, Features: The telescopic member (202) also includes an auxiliary rod (202e-1) arranged on the shielding pipe (202e) and fixedly installed on the shielding pipe (202e); one end of the auxiliary rod (202e-1) is fixedly connected to the shielding pipe (202e), and the other end extends toward the movable sleeve (202b-4) and slidably cooperates with the movable sleeve (202b-4).

7. The spent fuel loading device with emergency function as claimed in claim 6, Features: The locking member (203) comprises a fixing seat (203a) fixedly mounted on the mounting frame (202a), a cylinder (203b) fixedly mounted on the fixing seat (203a), a piston rod of the cylinder (203b) being connected to a locking plate (203d) via a pin (203c), a screw support (203e) being arranged at the tail of the cylinder (203b), a screw (203e-1) being mounted on the screw support (203e), a piston rod at the end of the cylinder (203b) being connected to the screw (203e-1) via an unlocking connecting rod (203e-2), a long notch being provided on the unlocking connecting rod (203e-2), and the piston rod of the cylinder (203b) being able to move freely.

8. The spent fuel loading device with emergency function as claimed in claim 7, Features: A slot (203d-1) is provided at the end of the locking plate (203d) to engage with the limiting pile (105), and three sets of the locking members (203) are provided, two of which are fixedly mounted on both sides of the mounting frame (202a) to locate the lifting position, and the other set of the locking members (203d) is provided on the side where the piston (202c) is connected to the chain (201f-1) to limit and fix the piston (202c).

9. The spent fuel loading device with emergency function as claimed in claim 8, Features: The protection member (204) comprises anti-falling piles (204a) arranged on both sides of the guide rail (101), and a plurality of anti-falling grooves (204a-1) are arranged on the anti-falling piles (204a).

10. The spent fuel loading device with emergency function according to claim 9, Features: The locking member (203) further comprises a protection box (204b) fixedly connected to the mounting frame (202a), a side of the protection box (204b) facing the anti-falling pile (204a) is provided with an ejection outlet (204b-1), the protection box (204b) further comprises an induction pile (204b-3) fixedly connected to the inner wall of the box body via a first spring (204b-2), and an end of the induction pile (204b-3) is provided with A clamping plate (204b-4) is provided on which a movable groove (204b-5) is arranged. The protective box (204b) further comprises an elastic pile (204b-6) sliding in the movable groove (204b-5). One end of the elastic pile (204b-6) is fixedly connected to the inner wall of the protective box (204b) through a compression spring (204b-7), and the other end is embedded and matched with the anti-falling groove (204a-1).

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