Device and method for quickly disassembling and assembling cadmium sleeve for neutron sensitivity calibration of out-of-reactor detector

Abstract

The invention relates to the technical field of neutron sensitivity calibration of out-of-pile detectors, and provides a cadmium sleeve rapid dismounting and mounting device and method for neutron sensitivity calibration of an out-of-pile detector. The hanging basket displacement support is connected with a longitudinal displacement mechanism used for driving the hanging basket displacement support to move in the longitudinal direction. A second guide rail is arranged at the bottom of the hanging basket displacement support, and when the hanging basket displacement support is located in the containing opening, the second guide rail and the first guide rail jointly form a transverse guide rail. The cadmium-free sleeve hanging basket is used for loading the out-of-pile detector; the hanging basket with the cadmium sleeve is used for loading the out-of-pile detector, and the hanging basket with the cadmium sleeve and the hanging basket without the cadmium sleeve are arranged on the transverse guide rail in a sliding manner; and the driving rod is used for driving the cadmium sleeve hanging basket and the cadmium-free sleeve hanging basket to move along the transverse direction. According to the method, the workload in the calibration process is reduced, the calibration work efficiency is improved, and the poisoning risk caused by long-term direct operation of the cadmium sleeve is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of neutron sensitivity calibration of an ex-pile detector, and in particular to a device and method for quickly disassembling and assembling a cadmium sleeve for neutron sensitivity calibration of an ex-pile detector. Background Art

[0002] In the design of nuclear reactors, the method of arranging external core detectors at different positions outside the core is used to monitor the state of the core neutron injection rate. This is also a commonly used method for online measurement of the core neutron injection rate level. The accuracy of the external core detector measurement will have a very significant impact on the safe operation of the reactor, so the neutron sensitivity of the detector must be calibrated.

[0003] During the neutron sensitivity calibration of the ex-pile detector, it is necessary to obtain the response of the ex-pile detector in the thermal neutron field with and without cadmium, in order to remove the response part of the neutron on cadmium. The traditional way is to manually dismantle and assemble the cadmium sleeve directly outside the detector basket. However, due to the large size of the ex-pile detector, the disassembly and assembly process is very cumbersome, time-consuming and labor-intensive, and cadmium is a toxic material with a risk of poisoning. Summary of the invention

[0004] The object of the present invention is to provide a device and method for quickly disassembling and assembling a cadmium sleeve for neutron sensitivity calibration of an out-of-core detector, so as to solve the defects of the existing method.

[0005] The present invention is achieved through the following technical solutions:

[0006] Cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of out-of-pile detector, including:

[0007] A first guide rail, with the top surface of the first guide rail as a reference surface, within the reference surface, the length direction of the first guide rail is defined as a transverse direction, and the direction perpendicular to the transverse direction is defined as a longitudinal direction;

[0008] A suspension basket displacement bracket is connected to a longitudinal displacement mechanism for driving the bracket to move longitudinally; the middle of the first guide rail is broken to form a receiving opening, and a second guide rail is provided at the bottom of the suspension basket displacement bracket. When the suspension basket displacement bracket is located at the receiving opening, the second guide rail and the first guide rail jointly form a transverse guide rail;

[0009] Cadmium-free hanging basket for loading ex-pile detectors;

[0010] A cadmium-sheathed hanging basket for loading the off-core detector, wherein both the cadmium-sheathed hanging basket and the cadmium-sheathed hanging basket can be slidably arranged on the transverse guide rail; and

[0011] A driving rod is used to drive the cadmium-covered hanging basket and the cadmium-free hanging basket to move horizontally.

[0012] Optionally, the cadmium-sheathed hanging basket and the cadmium-free hanging basket are movably connected, and the driving rod is movably connected to the cadmium-sheathed hanging basket or the cadmium-free hanging basket; the cadmium-sheathed hanging basket, the cadmium-free hanging basket and the driving rod are relatively fixed in the transverse direction and can slide relatively in the longitudinal direction.

[0013] Optionally, one of the cadmium sleeve hanging basket and the cadmium sleeve-free hanging basket is provided with a first barb portion with a groove facing upward, and the other is provided with a second barb portion with a groove facing downward, and the second barb portion is buckled with the first barb portion.

[0014] Optionally, the driving rod is fixedly connected to a connecting seat, and the connection method between the connecting seat and the cadmium-sheathed hanging basket or the cadmium-free hanging basket is the same as the connection method between the cadmium-sheathed hanging basket and the cadmium-free hanging basket.

[0015] Optionally, a handle is provided at the outer end of the driving rod.

[0016] Optionally, a transverse limiting member for limiting the extreme positions of the cadmium-sheathed hanging basket and the cadmium-free hanging basket is fixedly provided at each of the two ends in the transverse direction.

[0017] Optionally, a longitudinal limiter is fixedly provided in the longitudinal direction to limit the position of the hanging basket displacement bracket when the hanging basket displacement bracket is displaced to the accommodating opening.

[0018] The present invention also provides a method for quickly disassembling a cadmium sleeve for neutron sensitivity calibration of an out-of-pile detector, using any one of the above-mentioned devices for quickly disassembling a cadmium sleeve for neutron sensitivity calibration of an out-of-pile detector, comprising the following steps:

[0019] S1. Move one of the hanging basket with a cadmium jacket or the hanging basket without a cadmium jacket to the second guide rail at the bottom of the hanging basket displacement bracket through a driving rod, and then move it to a target position in the thermal neutron field along with the hanging basket displacement bracket;

[0020] S2, making the hanging basket displacement bracket and the hanging basket with cadmium sleeve or the hanging basket without cadmium sleeve moved therewith return to the receiving opening;

[0021] S3. Move the other of the cadmium-jacketed hanging basket and the non-cadmium-jacketed hanging basket to the second guide rail at the bottom of the hanging basket displacement bracket through the driving rod, and then move it to the target position in the thermal neutron field along with the hanging basket displacement bracket.

[0022] The technical solution of the present invention has at least the following advantages and beneficial effects: in the present invention, the transverse guide rail is composed of a first guide rail disconnected in the middle and a second guide rail at the bottom of a hanging basket displacement bracket, and the hanging basket with a cadmium sleeve and the hanging basket without a cadmium sleeve can be slidably arranged on the transverse guide rail, so that the hanging basket with a cadmium sleeve and the hanging basket without a cadmium sleeve are respectively carried and moved to the target position in the thermal neutron field by the hanging basket displacement bracket, and the disassembly and assembly work of the cadmium sleeve can be replaced by switching the hanging basket with a cadmium sleeve and the hanging basket without a cadmium sleeve, while maintaining the same function, reducing the workload in the calibration process, improving the calibration work efficiency, and avoiding the risk of poisoning caused by long-term direct operation of the cadmium sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the structure of a cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-pile detector provided by the present invention;

[0025] Figure 2 An exploded view of the cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-pile detector provided by the present invention;

[0026] Figure 3 It is a schematic diagram of the connection structure of a hanging basket without a cadmium sleeve and a hanging basket with a cadmium sleeve;

[0027] Icons: 1-first guide rail, 2-hanging basket displacement bracket, 201-second guide rail, 3-accommodating opening, 4-hanging basket without cadmium sleeve, 401-first barb part, 5-hanging basket with cadmium sleeve, 501-second barb part, 6-driving rod, 7-connecting seat, 8-handle, 9-left lateral limiter, 10-right lateral limiter, 11-longitudinal limiter. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of 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.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example 1

[0034] refer to Figure 1 and Figure 2 The present embodiment provides a cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an ex-core detector, comprising a first guide rail 1, a hanging basket displacement bracket 2, a cadmium-sheathed hanging basket 4 and a cadmium-sheathed hanging basket 5 for loading the ex-core detector, and a driving rod 6 for driving the cadmium-sheathed hanging basket 5 and the cadmium-sheathed hanging basket 4 to move laterally.

[0035] The top surface of the first guide rail 1 is taken as a reference surface. Within the reference surface, the length direction of the first guide rail 1 is defined as the horizontal direction, and the direction perpendicular to the horizontal direction is defined as the longitudinal direction. Figure 1 For reference, the left-right direction in the figure is the horizontal direction, and the front-back direction perpendicular to the paper surface is the longitudinal direction.

[0036] The basket displacement bracket 2 is connected with a longitudinal displacement mechanism for driving it to move longitudinally (not shown in the figure, in actual application, a linear module, a ball screw mechanism, etc. can be used to realize the longitudinal displacement of the basket displacement bracket 2), the middle part of the first guide rail 1 is broken to form a receiving opening 3, and the bottom of the basket displacement bracket 2 is provided with a second guide rail 201. When the basket displacement bracket 2 is located at the receiving opening 3, the second guide rail 201 and the first guide rail 1 jointly form a transverse guide rail, and the cadmium-sheathed basket 5 and the cadmium-free basket 4 can both be slidably arranged on the transverse guide rail. It should be understood that the cadmium-sheathed basket 5 and the cadmium-free basket 4 can slide on the first guide rail 1 and the second guide rail 201. At the same time, the first guide rail 1 and the second guide rail 201 also play the role of supporting the cadmium-sheathed basket 5 and the cadmium-free basket 4.

[0037] In this embodiment, the first guide rail includes two sub-guide rails arranged in parallel, and such arrangement leaves an intermediate space for the cadmium sleeve hanging basket 5 and the cadmium sleeve-free hanging basket 4 to slide.

[0038] Since the transverse guide rail is composed of a first guide rail 1 disconnected in the middle and a second guide rail 201 at the bottom of a hanging basket displacement bracket 2, the hanging basket with a cadmium sleeve 5 and the hanging basket without a cadmium sleeve 4 can be slidably arranged on the transverse guide rail. In this way, the hanging basket with a cadmium sleeve 5 and the hanging basket without a cadmium sleeve 4 are respectively carried and moved to the target position in the thermal neutron field by the hanging basket displacement bracket 2. The disassembly and assembly work of the cadmium sleeve can be replaced by switching the hanging basket with a cadmium sleeve 5 and the hanging basket without a cadmium sleeve 4 while maintaining the same function, thereby reducing the workload in the calibration process, improving the calibration work efficiency, and avoiding the risk of poisoning caused by long-term direct operation of the cadmium sleeve.

[0039] The cadmium-sheathed hanging basket 5 and the cadmium-free hanging basket 4 are movably connected, and the driving rod 6 is the driving rod 6, which is movably connected to the cadmium-sheathed hanging basket 5 or the cadmium-free hanging basket 4. At the same time, the cadmium-sheathed hanging basket 5, the cadmium-free hanging basket 4 and the driving rod 6 are relatively fixed in the transverse direction and can slide relatively in the longitudinal direction.

[0040] On this basis, as an option, refer to Figure 3 In this embodiment, one of the cadmium sleeve hanging basket 5 and the cadmium sleeve-free hanging basket 4 is provided with a first barb portion 401 with a groove facing upward, and the other is provided with a second barb portion 501 with a groove facing downward, and the second barb portion 501 is buckled with the first barb portion 401. Figure 1For reference, the hanging basket 5 with a cadmium sleeve is arranged on the right side of the figure, and the hanging basket 4 without a cadmium sleeve is arranged on the left side of the figure (it should be understood that in actual application, the positional relationship between the two can also be exchanged), the first barb portion 401 with the groove facing upward is arranged at the right end of the hanging basket 4 without a cadmium sleeve, and the second barb portion 501 with the groove facing downward is arranged at the left end of the hanging basket 5 with a cadmium sleeve. After the second barb portion 501 and the first barb portion 401 are buckled, the hanging basket 5 with a cadmium sleeve and the hanging basket 4 without a cadmium sleeve are relatively fixed in the horizontal direction, and the two can slide relative to each other in the longitudinal direction, so that one of them moves along the longitudinal direction with the hanging basket displacement bracket 2. In other embodiments, the hanging basket 5 with a cadmium sleeve and the hanging basket 4 without a cadmium sleeve can of course also be connected in other ways to achieve the above functions, for example, a T-slot is arranged at the right end of the hanging basket 4 without a cadmium sleeve (it is easy to understand that the T-slot extends in the longitudinal direction), and a T-head matching the T-slot is arranged at the left end of the hanging basket 5 with a cadmium sleeve.

[0041] The driving rod 6 is fixedly connected with a connecting seat 7, and the connection mode between the connecting seat 7 and the cadmium-sheathed hanging basket 5 or the cadmium-free hanging basket 4 is the same as the connection mode between the cadmium-sheathed hanging basket 5 and the cadmium-free hanging basket 4. For example, in this embodiment, the connecting seat 7 is connected to the right end of the cadmium-sheathed hanging basket 5, and the connecting seat 7 and the cadmium-sheathed hanging basket 5 are also connected by mutually buckled barbs, so that the connecting seat 7 and the cadmium-sheathed hanging basket 5 are relatively fixed in the horizontal direction and can slide relatively in the longitudinal direction, so that the cadmium-sheathed hanging basket 5 can move along the longitudinal direction following the hanging basket displacement bracket 2. For easy operation, a handle 8 is provided at the outer end of the driving rod 6.

[0042] In addition, in other embodiments, of course, the lateral displacement of the cadmium-sheathed hanging basket 5 and the non-cadmium-sheathed hanging basket 4 can also be achieved by other means. For example, there is no connection between the cadmium-sheathed hanging basket 5 and the non-cadmium-sheathed hanging basket 4, but they are abutted together, and the driving rod 6 includes two rods, which are respectively arranged at both ends in the lateral direction. Figure 1 For reference, one rod is set at the left end and the other rod is set at the right end. Pushing the rod at the left end causes the cadmium-sheathed hanging basket 5 and the cadmium-free hanging basket 4 to move to the right together, and pushing the rod at the right end causes the cadmium-sheathed hanging basket 5 and the cadmium-free hanging basket 4 to move to the left together.

[0043] In this embodiment, a lateral limiter for limiting the extreme positions of the cadmium sleeve hanging basket 5 and the cadmium sleeve-free hanging basket 4 is fixedly provided at each of the two ends in the lateral direction. Figure 1The positional relationship is for reference. For the convenience of description, the transverse limiter at the left end of the figure is named the left transverse limiter 9, and the transverse limiter at the right end of the figure is named the right transverse limiter 10. It should be understood that when the cadmium-free basket 4 is abutted against the left transverse limiter 9, the cadmium-covered basket 5 is just located at the accommodating opening 3 (i.e., it just slides into the second guide rail 201 at the bottom of the basket displacement bracket 2). Similarly, when the cadmium-covered basket 5 is abutted against the right transverse limiter 10, the cadmium-free basket 4 is just located at the accommodating opening 3 (i.e., it just slides into the second guide rail 201 at the bottom of the basket displacement bracket 2).

[0044] Furthermore, the present embodiment is fixedly provided with a longitudinal limit member 11 in the longitudinal direction to limit the position of the hanging basket displacement bracket 2 when the hanging basket displacement bracket 2 is displaced to the accommodating opening 3, that is, when the hanging basket displacement bracket 2 is displaced toward the accommodating opening 3, it just enters the accommodating opening 3 after abutting against the longitudinal limit member 11 (that is, the second guide rail 201 just forms a transverse guide rail with the first guide rail 1).

[0045] In addition, it should be noted that, in actual applications, the first guide rail 1, the transverse limiter and the longitudinal limiter are all fixedly connected to the frame (ie, the fixed part of the calibration device, not shown in the figure).

[0046] Example 2

[0047] This embodiment provides a method for quickly disassembling and assembling a cadmium sleeve for neutron sensitivity calibration of an ex-pile detector, using the device for quickly disassembling and assembling a cadmium sleeve for neutron sensitivity calibration of an ex-pile detector provided in Embodiment 1, including the following steps:

[0048] S1, move one of the cadmium-sheathed hanging basket 5 or the cadmium-free hanging basket 4 to the second guide rail 201 at the bottom of the hanging basket displacement bracket 2 by the driving rod 6, take the cadmium-free hanging basket 4 being removed first and the cadmium-sheathed hanging basket 5 being removed later as an example (easy to understand, in practical applications, the order can be exchanged), pull the driving rod 6 to the right to the limit position during operation, at which time the cadmium-free hanging basket 4 is located on the second guide rail 201, and then the cadmium-free hanging basket 4 is displaced to the target position in the thermal neutron field along with the hanging basket displacement bracket 2;

[0049] S2, make the hanging basket displacement bracket 2 and the cadmium-sheathed hanging basket 5 or the cadmium-free hanging basket 4 moved therewith return to the receiving port 3, on the basis of the above, even if the hanging basket displacement bracket 2 carries the cadmium-free hanging basket 4 back to the receiving port 3;

[0050] S3. Move the other one of the cadmium-sheathed hanging basket 5 and the non-cadmium-sheathed hanging basket 4 to the second guide rail 201 at the bottom of the hanging basket displacement bracket 2 through the driving rod 6. On the basis of the above, the driving rod 6 is pushed to the left to the limit position. At this time, the cadmium-sheathed hanging basket 5 is located on the second guide rail 201, and then the cadmium-sheathed hanging basket 5 is displaced to the target position in the thermal neutron field along with the hanging basket displacement bracket 2.

[0051] Through the above method, the disassembly and assembly of the cadmium sleeve is replaced by switching the hanging basket 5 with the cadmium sleeve and the hanging basket 4 without the cadmium sleeve, while maintaining the same function, reducing the workload in the calibration process, improving the calibration work efficiency, and avoiding the risk of poisoning caused by long-term direct operation of the cadmium sleeve.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-pile detector, characterized in that: include: A first guide rail, with the top surface of the first guide rail as a reference surface, within the reference surface, the length direction of the first guide rail is defined as a transverse direction, and the direction perpendicular to the transverse direction is defined as a longitudinal direction; The suspension basket displacement bracket is connected to a longitudinal displacement mechanism for driving the bracket to move longitudinally; the middle of the first guide rail is broken to form a receiving opening, and a second guide rail is provided at the bottom of the suspension basket displacement bracket. When the suspension basket displacement bracket is located at the receiving opening, the second guide rail and the first guide rail jointly form a transverse guide rail; Cadmium-free hanging basket for loading ex-pile detectors; A cadmium-sheathed hanging basket for loading the off-core detector, wherein both the cadmium-sheathed hanging basket and the cadmium-sheathed hanging basket can be slidably arranged on the transverse guide rail; and A driving rod is used to drive the cadmium-covered hanging basket and the cadmium-free hanging basket to move horizontally.

2. The cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-pile detector according to claim 1, characterized in that: The cadmium-sheathed hanging basket and the cadmium-free hanging basket are movably connected, and the driving rod is movably connected to the cadmium-sheathed hanging basket or the cadmium-free hanging basket; the cadmium-sheathed hanging basket, the cadmium-free hanging basket and the driving rod are relatively fixed in the transverse direction and can slide relatively in the longitudinal direction.

3. The cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-pile detector according to claim 2, characterized in that: One of the cadmium sleeve hanging basket and the cadmium sleeve-free hanging basket is provided with a first barb portion with a groove facing upwards, and the other is provided with a second barb portion with a groove facing downwards, and the second barb portion is buckled with the first barb portion.

4. The cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-pile detector according to claim 2, characterized in that: The driving rod is fixedly connected with a connecting seat, and the connection mode between the connecting seat and the cadmium-sheathed hanging basket or the cadmium-free hanging basket is the same as the connection mode between the cadmium-sheathed hanging basket and the cadmium-free hanging basket.

5. The cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-pile detector according to claim 2, characterized in that: A handle is provided at the outer end of the driving rod.

6. The cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-core detector according to any one of claims 1 to 5, characterized in that: A transverse limiting member for limiting the extreme positions of the hanging basket with the cadmium sleeve and the hanging basket without the cadmium sleeve is fixedly arranged at each of the two ends in the transverse direction.

7. The cadmium sleeve quick disassembly and assembly device for neutron sensitivity calibration of an out-of-core detector according to any one of claims 1 to 5, characterized in that: A longitudinal limiting piece is fixedly arranged in the longitudinal direction to limit the position of the hanging basket displacement bracket when the hanging basket displacement bracket is displaced to the accommodating opening.

8. A method for quickly disassembling and assembling a cadmium sleeve for neutron sensitivity calibration of an out-of-core detector, using the device for quickly disassembling and assembling a cadmium sleeve for neutron sensitivity calibration of an out-of-core detector according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Move one of the hanging basket with a cadmium jacket or the hanging basket without a cadmium jacket to the second guide rail at the bottom of the hanging basket displacement bracket through a driving rod, and then move it to a target position in the thermal neutron field along with the hanging basket displacement bracket; S2, making the hanging basket displacement bracket and the hanging basket with cadmium sleeve or the hanging basket without cadmium sleeve moved therewith return to the receiving opening; S3. Move the other of the cadmium-jacketed hanging basket and the non-cadmium-jacketed hanging basket to the second guide rail at the bottom of the hanging basket displacement bracket through the driving rod, and then move it to the target position in the thermal neutron field along with the hanging basket displacement bracket.

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