A mobile shielding body and a glove box

Abstract

The present invention discloses a mobile shielding body, which includes: a fixed shielding structure, which includes a shielding shell and a stainless steel frame, the shielding shell and the stainless steel frame are connected by screws to form a stepped feed channel and an inner cavity; a mobile shielding structure, which is combined with the fixed shielding structure, and the mobile shielding structure can move in the axial direction relative to the fixed shielding structure; a driving mechanism, which is used to provide a driving force to drive the movement of the mobile shielding structure. The present invention also discloses a glove box.

Description

Technical Field

[0001] The present invention belongs to the field of radioactive nuclear fuel manufacturing, and specifically relates to a mobile shielding body structure, which is used for shielding and protecting during the processes of feeding, manual cluster assembly and unpacking of MOX (mixed oxide) fuel rods, so as to realize dynamic shielding of radioactive materials. The present invention also relates to a glove box including the mobile shielding body structure. Background Art

[0002] In the field of nuclear fuel manufacturing, for situations where radioactive materials need to be manually operated inside a glove box, the shielding body and the glove box are usually integrated for overall protection. The thickness of the shielding shell is easily increased, which increases the manufacturing cost. At the same time, because the operator needs to wear lead gloves (or tungsten gloves, etc.) to operate, it is difficult to operate the material in and out and cannot be observed closely. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a mobile shielding body and a glove box in view of the above-mentioned deficiencies in the prior art. The mobile shielding body is used to solve the safety protection problem of the radioactive material MOX fuel rods inside the glove box during manual close-range clustering operation and out-of-box movement.

[0004] In order to solve the above technical problems, the present invention provides a mobile shielding body, which includes: a fixed shielding structure, which includes a shielding shell and a stainless steel frame, the shielding shell and the stainless steel frame are connected by screws to form a stepped feed channel and an inner cavity; a mobile shielding structure, which is combined with the fixed shielding structure, and the mobile shielding structure can move axially relative to the fixed shielding structure; a driving mechanism, which is used to provide a driving force to drive the movement of the mobile shielding structure.

[0005] According to the present invention, the mobile shielding structure comprises a steel shell, a shielding plate and a guide motion component arranged on the shielding plate, the steel shell and the shielding plate form a fixed connection, and the guide motion component is used to connect the mobile shielding structure with the fixed shielding structure.

[0006] According to the present invention, the guide motion assembly comprises a guide rail and a slider, wherein the guide rail is fixed to the movable shielding structure by screws, and the slider is fixed to the fixed shielding structure by screws.

[0007] According to the present invention, there are two guide rails and four sliders, and each guide rail cooperates with two sliders.

[0008] According to the present invention, the driving mechanism includes: a cylinder for providing driving force; a push block, which is driven by the cylinder to move in the forward and reverse directions along the axial direction; a guide shaft, which is fixedly connected to the movable shielding structure and slidably connected to the push block, and driven by the cylinder to drive the movable shielding structure to move in the forward and reverse directions along the axial direction; a clutch assembly, including a pendulum block and a separation block, the pendulum block is rotatably arranged on the push block and moves with the push block, and the separation block is fixedly arranged at a suitable position on the movement trajectory of the pendulum block, wherein the guide shaft is provided with a groove, and the pendulum block can be inserted into the groove of the guide shaft.

[0009] According to the present invention, the separation block is used to make the pendulum block disengage from the groove of the guide shaft. The separation block is arranged at a position corresponding to the position where the groove of the guide shaft is located when the guide shaft drives the movable shielding structure to move to the maximum extended position relative to the fixed shielding structure. After the pendulum block disengages from the groove of the guide shaft, the guide shaft and the movable shielding structure stop moving, and the push block can further move in the positive axial direction under the drive of the cylinder.

[0010] According to the present invention, the driving mechanism also includes: a guide sleeve, which is arranged on the push block, and the guide shaft is inserted into the guide sleeve to achieve a slidable connection with the push block; an auxiliary support seat, which is fixedly arranged on the motion trajectory of the guide shaft and is used to auxiliary support the guide shaft.

[0011] The beneficial technical effects of the present invention are:

[0012] The mobile shielding body can move with the materials to be shielded, achieving dynamic shielding in the largest possible range, while effectively saving materials for manufacturing the shielding shell. The stepped channel formed by the fixed shielding structure can effectively reduce the radiation level of the active area of ​​the MOX fuel rod while ensuring the entry and exit of materials. By setting up a mobile shielding body, the active area of ​​the MOX fuel rod bundle being operated can be protected dynamically, ensuring the safety of the fuel rod bundle when it is out of the box. The mobile shielding structure can meet the requirements of operators for close-up and long-term observation and operation, and has the advantages of ingenious structure, small space occupation, and easy operation.

[0013] The movable shielding body according to the present invention shields the active area of ​​the material in a targeted manner to meet the shielding and protection requirements when the radioactive material is in and out, while facilitating close-range manual operation and observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of a movable shielding body according to an embodiment of the present invention, showing a state in which a movable shielding structure is pushed out from a fixed shielding structure;

[0015] Figure 2 is a perspective view of a fixed shielding structure of a movable shielding body according to an embodiment of the present invention;

[0016] Figure 3 is a perspective view of a mobile shielding structure of a mobile shielding body according to an embodiment of the present invention, showing a state where the mobile shielding structure is in an initial position;

[0017] Figure 4 FIG. 4 is a perspective view of a driving mechanism of a movable shielding structure of a movable shielding body according to an embodiment of the present invention.

[0018] In the figure: 1-fixed shielding structure, 2-movable shielding structure, 3-shielding shell, 4-stainless steel frame, 5-steel shell, 6-shielding plate, 7-guide motion component, 8-driving mechanism, 9-guide rail, 10-slider, 11-cylinder, 12-push block, 13-support, 14-guide shaft, 15-clutch assembly, 16-fuel rod bundle, 17-connecting plate, 18-L-shaped connecting plate, 19-swing block, 20-pin shaft, 21-separation plate, 22-guide sleeve, 23-auxiliary support seat. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0020] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] Figure 1 It is a perspective view of a movable shielding body according to an embodiment of the present invention, showing a state in which the movable shielding structure is pushed out from the fixed shielding structure. Figure 2 FIG. 4 is a perspective view of a fixed shielding structure of a movable shielding body according to an embodiment of the present invention. Figure 3 It is a perspective view of a mobile shielding structure of a mobile shielding body according to an embodiment of the present invention, showing a state where the mobile shielding structure is in an initial position.

[0023] like Figure 1 As shown, the mobile shielding body in this embodiment includes a fixed shielding structure 1, a mobile shielding structure 2 and a driving mechanism 8. The mobile shielding structure 2 can move in one direction (hereinafter referred to as the axial direction, i.e., the X direction in the figure) relative to the fixed shielding structure 1. Figure 2 and Figure 3 The fixed shielding structure 1 and the movable shielding structure 2 are described in detail respectively.

[0024] like Figure 2 As shown, the fixed shielding structure 1 of the mobile shielding body according to the embodiment of the present invention is mainly formed by a shielding shell 3 and a stainless steel frame 4, and the shielding shell 3 and the stainless steel frame 4 are connected by screws to form a stepped feed channel and an inner cavity. The fixed shielding structure 1 of the mobile shielding body according to the embodiment of the present invention is used to shield the active area of ​​the MOX (mixed oxide) fuel rod during the feeding process. Due to the stepped feed channel formed between the shielding shell 3 and the stainless steel frame 4, the radiation of the MOX fuel rod during the feeding process is prevented from directly reaching the outside of the fixed shielding structure 1, which greatly reduces the scattering of the active area and plays a good protective role in the feeding operation of the MOX fuel rod.

[0025] like Figure 3 As shown, the mobile shielding structure 2 comprises a steel shell 5 and a shielding plate 6. The steel shell 5 and the shielding plate 6 are fixedly connected by screws. Figure 3 The figure also shows a driving mechanism 8, which is used to drive the movable shielding structure 2 to move axially and to push out the fuel rod bundle. Figure 4 Describe in more detail Figure 3 The driving mechanism 8 in.

[0026] Figure 4 FIG. 4 is a perspective view of a driving mechanism 8 of a movable shielding body according to an embodiment of the present invention.

[0027] The driving mechanism 8 includes a cylinder 11, a push block 12, a support 13, a guide shaft 14 and a pendulum block 19. The push block 12 is used to push the fuel rod bundle 16 in the axial direction (X direction) to push the fuel rod bundle 16 out of the glove box. The pendulum block 19 is connected to the L-shaped connecting plate 18 through a pin 20 so that it can pivot relative to the L-shaped connecting plate 18. The L-shaped connecting plate 18 is connected to the push block 12 by screws, so the pendulum block 19 moves with the push block 12. The pendulum block 19 and the separation block 21 together constitute a clutch assembly 15, wherein the separation block 21 is fixed in the axial direction. In the driving mechanism 8, the push block 12 is driven by the cylinder 11 to move in the axial direction (X direction in the figure).

[0028] The driving mechanism 8 may further include a guide sleeve 22 and an auxiliary support seat 23, wherein the guide sleeve 22 is used to connect with the guide shaft 14, and the guide shaft 14 can slide in the guide sleeve 22; the auxiliary support seat 23 is used to provide additional support for the guide shaft 14 to prevent the guide shaft 14 from bending and deformation.

[0029] The connection between the movable shielding structure 2 and the fixed shielding structure 1, and the connection between the movable shielding structure 2 and the guide shaft 14 are described as follows.

[0030] like Figures 1 to 4As shown, the mobile shielding structure 2 is connected to the fixed shielding structure 1 through the guide motion assembly 7. The guide motion assembly 7 includes a guide rail 9 and a slider 10. The guide rail 9 is fixed to the shielding plate 6 of the mobile shielding structure 2 by screws. The slider 10 is fixed to the fixed shielding structure 1 by screws. The relative movement between the guide rail 9 and the slider 10 of the guide motion assembly 7 realizes the relative movement between the fixed shielding structure 1 and the mobile shielding structure 2 along the axial direction.

[0031] like Figure 3 As shown, one end of the movable shielding structure 2 is fixedly connected to the guide shaft 14 of the driving mechanism 8 through the connecting plate 17. The guide shaft 14 is driven by the cylinder 11. When the movable shielding structure 2 moves axially relative to the fixed shielding structure 1, the guide shaft 14 drives the movable shielding structure 2 to move together. Figure 3 As shown, a groove is formed on the guide shaft 14. The groove is used to cooperate with and separate from the pendulum block 19 in the clutch assembly 15. The pendulum block 19 in the clutch assembly 15 can be embedded in the groove on the guide shaft 14 under the action of gravity.

[0032] Combine the following Figures 1 to 4 The working process of the mobile shielding body according to the embodiment of the present invention is described as follows:

[0033] First, a single fuel rod is fed through a stepped feed channel formed between the shield shell 3 and the stainless steel frame 4 and is bundled into a fuel rod bundle 16 in the movable shield body according to the embodiment of the present invention.

[0034] Next, the cylinder 11 needs to drive the fuel rod bundle 16 to move along the axial direction (X direction) to push it out of the mobile shielding body according to the embodiment of the present invention. In this process, the cylinder 11 drives the push block 12, and the push block 12 pushes the fuel rod bundle 16 to move along the axial direction (X direction). At the same time, through the cooperation of the pendulum block 19 and the groove of the guide shaft 14 and the fixed connection formed between one end of the mobile shielding structure 2 and the guide shaft 14 through the connecting plate 17, the guide shaft 14 and the mobile shielding structure 2 move together along the axial direction, so that the mobile shielding structure 2 is extended in the axial direction relative to the fixed shielding structure 1, as shown in FIG. Figure 1 When the shield structure 2 is moved from Figure 3 Move to the position shown Figure 1 When the pendulum block 19 is in the position shown, the pendulum block 19 moves to the position of the separation block 21, and the pendulum block 19 can be separated from the guide shaft 14 with the help of the separation block 21. Specifically, the separation block 21 lifts the pendulum block 19, thereby causing the pendulum block 19 to disengage from the groove on the guide shaft 14. When the pendulum block 19 disengages from the groove on the guide shaft 14, the movement of the guide shaft 14 stops, and the movable shielding structure 2 also stops moving. Subsequently, the cylinder 11 continues to drive the push block 12 and the fuel rod bundle 16 to move further in the axial direction until the fuel rod bundle 16 is pushed out of the glove box.

[0035] Finally, after the fuel rod bundle 16 is pushed out of the glove box, the cylinder 11 drives the push block 12 to move in the reverse direction back to the Figure 3 The initial position shown is the zero position. In this process, the cylinder 11 drives the push block 12 and the pendulum block 12 to move in the opposite direction (in the -X direction) passing the position of the separation block 21, and then reaches the groove of the guide shaft 14. Under the action of gravity, the pendulum block 12 is embedded in the groove of the guide shaft 14. At this time, the cylinder 11 continues to drive the push block 12, and the guide shaft 14 moves in the opposite direction (in the -X direction) with the push block 12 through the embedding of the pendulum block 12. At the same time, driven by the guide shaft 14, the movable shielding structure 2 also moves in the opposite direction until it returns to Figure 3 The initial position shown, at this time, the mobile shielding structure 2 is retracted into the fixed shielding structure 1, thereby entering the next working cycle.

[0036] Example 2

[0037] This embodiment also discloses a glove box, including a box body and the above-mentioned movable shielding body, wherein the movable shielding body is arranged in the box body and is in the active area of ​​the material, and is used to push the fuel rods out of the glove box and dynamically shield the material at the same time.

[0038] According to the present invention, the mobile shielding body can move with the material to be shielded, so as to achieve dynamic shielding in the largest possible range, and at the same time, can effectively save the material for manufacturing the shielding shell. The stepped channel formed by the fixed shielding structure can effectively reduce the radiation level of the active area of ​​the MOX fuel rod while ensuring the entry and exit of materials. By setting up a mobile shielding body, the active area of ​​the operated MOX fuel rod bundle can be protected dynamically, ensuring the safety of the protection when the fuel rod bundle is out of the box. The mobile shielding structure can meet the requirements of operators for long-term close observation and operation, and has the advantages of ingenious structure, small space occupation, and convenient operation.

[0039] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A mobile shielding body, characterized in that: include: A fixed shielding structure, which includes a shielding shell and a stainless steel frame, wherein the shielding shell and the stainless steel frame are connected by screws to form an inner cavity and a stepped feed channel for the fuel rods to enter and exit; A mobile shielding structure is combined with the inner cavity of the fixed shielding structure, and the mobile shielding structure can move in the axial direction relative to the fixed shielding structure, thereby expanding the shielding range of the active area; A driving mechanism for providing a driving force to push the fuel rods and drive the movement of the mobile shielding structure; The driving mechanism comprises: Cylinder, used to provide driving force; A push block is driven by the cylinder to move in the forward and reverse directions along the axial direction to push the fuel rods; A guide shaft is fixedly connected to the movable shielding structure and slidably connected to the push block, and driven by the cylinder to drive the movable shielding structure to move in the forward and reverse directions along the axial direction; The clutch assembly includes a pendulum block and a separation block. The pendulum block is rotatably arranged on the push block and moves with the push block. The separation block is fixedly arranged at a suitable position on the movement track of the pendulum block. Wherein, the guide shaft is provided with a groove, and the pendulum block can be inserted into the groove of the guide shaft; The separation block is used to make the pendulum block disengage from the groove of the guide shaft. The separation block is arranged at a position corresponding to the position where the groove of the guide shaft is located when the guide shaft drives the movable shielding structure to move to the maximum extended position relative to the fixed shielding structure. After the pendulum block disengages from the groove of the guide shaft, the guide shaft and the movable shielding structure stop moving, and the push block further moves in the axial positive direction under the drive of the cylinder.

2. The movable shielding body according to claim 1, wherein: The mobile shielding structure comprises a steel shell, a shielding plate and a guide motion component arranged on the shielding plate. The steel shell is fixedly connected to the shielding plate. The guide motion assembly connects the movable shielding structure to the fixed shielding structure and is used to guide the movement of the movable shielding structure relative to the fixed shielding structure.

3. The movable shielding body according to claim 2, wherein: The guide motion component comprises a guide rail and a slider, wherein the guide rail is fixed on the movable shielding structure, and the slider is fixed on the fixed shielding structure.

4. The movable shielding body according to claim 3, wherein: There are two guide rails and four sliders, and each guide rail cooperates with two sliders.

5. The movable shielding body according to claim 1, wherein the driving mechanism further comprises: A guide sleeve is arranged on the push block, and the guide shaft is sleeved into the guide sleeve to realize a slidable connection with the push block; The auxiliary support seat is fixedly arranged on the motion track of the guide shaft and is used for auxiliary supporting the guide shaft.

6. A glove box, comprising a box body, characterized in that: It also includes the movable shielding body according to any one of claims 1 to 5, The movable shielding body is arranged in the box body and is located in the active area of ​​the material, and is used to push the fuel rod out of the glove box.

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