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CN109360668B - A pneumatic locking device for a control rod drive mechanism of a pool-type cryogenic reactor - Google Patents

A pneumatic locking device for a control rod drive mechanism of a pool-type cryogenic reactor Download PDF

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Publication number
CN109360668B
CN109360668B CN201811342555.9A CN201811342555A CN109360668B CN 109360668 B CN109360668 B CN 109360668B CN 201811342555 A CN201811342555 A CN 201811342555A CN 109360668 B CN109360668 B CN 109360668B
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China
Prior art keywords
connecting rod
control rod
locking device
assembly
hook
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CN201811342555.9A
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Chinese (zh)
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CN109360668A (en
Inventor
彭朝晖
郭志家
张金山
柯国土
刘兴民
衣大勇
周寅鹏
范月容
石辰蕾
姚成志
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China Institute of Atomic of Energy
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China Institute of Atomic of Energy
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C7/00—Control of nuclear reaction
    • G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
    • G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
    • G21C7/12—Means for moving control elements to desired position
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C7/00—Control of nuclear reaction
    • G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
    • G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
    • G21C7/12—Means for moving control elements to desired position
    • G21C7/14—Mechanical drive arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Manipulator (AREA)
  • Actuator (AREA)

Abstract

The invention relates to a pneumatic locking device for a pool type low-temperature reactor control rod driving mechanism, which comprises a corrugated pipe, a connecting rod mechanism, a hook claw assembly and an end head, wherein two ends of the corrugated pipe are respectively connected with the connecting rod mechanism and the hook claw assembly, and the length of the corrugated pipe is changed to enable the connecting rod mechanism to act on the hook claw assembly so as to enable a hook claw of the hook claw assembly to grasp/release the end head. The invention has the advantages that 1, the end head is grabbed by the bellow driving hook claw assembly, thereby realizing the purpose of providing large grabbing force by small gas pressure, preventing the control rod assembly below the end head from falling off during vibration, and being reliable in work, 2, the cylinder body and the control rod assembly are automatically and centrally connected by the guide cylinder, 3, the control rod assembly can be quickly released and released under the condition of power failure by the arrangement of the reset spring, and 4, the gas supply part is easy to seal under water.

Description

Pneumatic locking device for pool type low-temperature reactor control rod driving mechanism
Technical Field
The invention relates to the technical field of cores, in particular to a pneumatic locking device for a pool type low-temperature reactor control rod driving mechanism.
Background
The control rod driving mechanism is an important device for ensuring the safety of a reactor, the performance of the control rod driving mechanism directly influences the safety of the nuclear reactor, and the locking device is a key component on the pool type low-temperature reactor control rod driving mechanism, and is related to the safety of the nuclear reactor and the refueling process.
The pool type heating pile has experience in domestic use, but has smaller power, less control rod driving mechanisms and less weight of the control rod assembly, so that the lifting force is also small, and the volume of the electromagnet device is required to be increased if the lifting force is increased. The reactor core has the characteristic of compact arrangement, generally has limited space for a control rod driving mechanism, needs to consider the limitation of the size of the electromagnet device when designing the electromagnet device, and needs to work reliably. However, other types of related art than electromagnet devices have not been known in the art to meet the above needs.
In view of this, the present invention has been made.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a pneumatic locking device for a pool type low-temperature reactor control rod driving mechanism, which can realize the function of providing large grabbing force with small gas pressure to grab an end head.
The technical scheme of the invention is as follows:
The pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism comprises a corrugated pipe, a connecting rod mechanism, a hook claw assembly and an end head, wherein two ends of the corrugated pipe are respectively connected with the connecting rod mechanism and the hook claw assembly, and the length of the corrugated pipe is changed to enable the connecting rod mechanism to act on the hook claw assembly so that a hook claw of the hook claw assembly can grasp/loosen the end head.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism comprises a cylinder body and a claw, wherein the claw is arranged on the cylinder body through a pin shaft and is further connected with the connecting rod mechanism and driven by the connecting rod mechanism to rotate around the pin shaft so as to grasp/release the end head.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism comprises a central connecting rod and a first connecting rod, wherein two ends of the first connecting rod are respectively hinged with the central connecting rod and the end parts of the hook claw, the central connecting rod is connected with the corrugated pipe, and a centering hole for the central connecting rod to penetrate through is formed in the cylinder body.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism further comprises an upper cover, wherein the upper cover is fixedly connected with the cylinder, and the corrugated pipe is connected with the upper cover.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism further comprises an outer cylinder wall, wherein the cylinder body is arranged in the outer cylinder wall and can move along the outer cylinder wall, and the size of the cylinder body is matched with that of the outer cylinder wall.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism is characterized in that rollers beneficial to movement of the claw assembly are further arranged on the upper cover, the number of the rollers is 2-4, and the rollers are uniformly arranged around the cylinder body.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism is characterized in that the cylinder body is provided with a hole for communicating the inside and the outside of the cylinder body.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism is characterized in that a reset spring is arranged between the hook claw assembly and the connecting rod mechanism.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism is characterized in that the number of the reset springs is 1-4, and the reset springs are arranged on the central axis or the dividing circle of the cylinder.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism has 2-3 hooks which are uniformly arranged on the cylinder body.
Further, the pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism is characterized in that the end head is provided with a stop step matched with the hook claw assembly.
The beneficial effects of the invention are as follows:
1. The corrugated pipe drives the claw assembly to grab the end head, so that the purpose of providing large grabbing force by small gas pressure is realized, the control rod assembly below the end head is prevented from falling off during vibration, and the operation is reliable;
2. the automatic centering connection of the cylinder body and the control rod assembly is realized through the guide cylinder;
3. Through reset spring's setting, guarantee under the outage condition, can throw off fast, release control rod subassembly.
4. The air supply member is easily sealed under water.
Drawings
Fig. 1 is a schematic structural view (grabbing state) of a pneumatic latch device for a pool type low temperature reactor control rod driving mechanism of the present invention.
Fig. 2 is a schematic structural view (opened state) of a pneumatic latch device for a pool-type low-temperature reactor control rod driving mechanism according to the present invention.
Fig. 3 is a schematic diagram of the distribution of the rollers according to the present invention.
FIG. 4 is a schematic distribution of the fingers of the present invention.
Fig. 5 is a schematic distribution diagram of the return spring of the present invention.
In the drawings, 1, an outer cylinder wall, 2, an upper cover, 3, a roller, 4, a reset spring, 5, a first connecting rod, 6, a hook claw, 7, an end, 8, a cylinder body, 9, a central connecting rod, 10, a corrugated pipe, 11, a connecting screw, 12, an air pipe, 13, a pin shaft, 14 and a pin shaft.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, the invention provides a pneumatic locking device for a pool type low temperature reactor control rod driving mechanism, which comprises a corrugated pipe 10, a connecting rod mechanism, a claw assembly and a head 7, wherein two ends of the corrugated pipe 10 are respectively connected with the connecting rod mechanism and the claw assembly, and the length of the corrugated pipe 10 is changed to enable the connecting rod mechanism to act on the claw assembly so as to enable a claw 6 of the claw assembly to grasp/release the head 7. The end head 7 is provided with a stop step matched with the hook claw assembly.
As shown in fig. 1 and 4, the claw assembly comprises a claw 6, a cylinder 8 and an upper cover 2, wherein the claw 6 is mounted on the cylinder 8 through a pin shaft 13, and the claw 6 is also connected with the link mechanism and rotates around the pin shaft 13 under the drive of the link mechanism so as to grasp/release the end head 7. The connecting rod mechanism comprises a central connecting rod 9 and a first connecting rod 5, two ends of the first connecting rod 5 are respectively hinged with the ends of the central connecting rod 9 and the hook claw 6, two ends of a corrugated pipe 10 are respectively connected with the upper cover 2 and the central connecting rod 9, and a closed cavity is formed inside the corrugated pipe 10. The cylinder 8 is provided with a centering hole (i.e. a guide hole or a groove) for the central connecting rod 9 to pass through, so that the central connecting rod 9 can only move axially along the guide hole or the groove, and the guide hole or the groove is provided with a limiting step for limiting the stroke of the central connecting rod 9. The upper cover 2 is fixedly connected with the cylinder 8, and the corrugated pipe 10 is connected with the upper cover 2. In this embodiment, the upper cover 2 is fixedly connected to the cylinder 8 by a connecting screw 11, and the air tube 12 of the bellows 10 extends from above through the upper cover 2.
The pneumatic locking device for the pool type low-temperature reactor control rod driving mechanism further comprises an outer cylinder wall 1, the hook component is arranged in the outer cylinder wall 1 and can move along the outer cylinder wall 1, the cylinder body 8 is provided with a centering hole for the ejector rod 6 to penetrate through, and the size of the cylinder body 8 is matched with that of the outer cylinder wall 1. The upper cover 2 is also provided with rollers 3 which facilitate the movement of the cylinder 8. The number of the rollers is 2-4, and the rollers are uniformly arranged around the upper cover 2. As shown in fig. 3, the roller 3 is mounted by a pin 14. When the pneumatic locking device of the driving mechanism is installed in the outer cylinder wall 1 from the upper part, the roller 3 slides along the inner wall of the outer cylinder wall 1, the end 7 connected with the control rod assembly is automatically centered, and when the pneumatic locking device is overlapped with the stop step of the end 7, the grabbing function can be realized through pneumatic control of the corrugated pipe 10. The stop step allows the pneumatic latch and the end head 7 to be matched in place, so that the condition that the claw 6 cannot catch the end head 7 is prevented.
As shown in fig. 5, a return spring 4 is provided between the center link 9 and the cylinder 8. The number of the reset springs 4 is 1-4, and the reset springs are arranged on the central axis or the dividing circle of the cylinder 8.
When the pneumatic clamping lock is used, air is taken in from the air pipe 12, the pressure in the corrugated pipe 10 is increased, the central connecting rod 9 is pushed to move, the return spring 4 is compressed, the central connecting rod 9 drives the connecting rod to move, the hook claw 6 rotates and closes the grabbing end head 7, and the control rod assembly is driven to move up and down or keep a fixed position. The pneumatic latch exhausts from the air pipe 12, the pressure in the corrugated pipe 10 is reduced, the central connecting rod 9 is pushed back under the action of the return spring 4, the hook claw 6 is opened to release the control rod assembly, and the open state schematic diagram of the pneumatic latch hook claw 6 is shown in fig. 2. The volume of the chamber between the cylinder 8 and the bellows 10 changes due to the movement of the central link 9 when the gas pressure changes, and holes are formed in the cylinder 8 to reduce the damping of the liquid flow when the bellows length changes, thereby reducing the resistance to the movement of the central link 9. In the embodiment, the claw 6 can be opened without intervention of external force under the condition of power failure, so that the function of rapidly dropping the control rod driving mechanism is realized. The spring has high working reliability, thereby improving the reliability of the quick rod falling function of the control rod driving mechanism.
The working environment medium of the electromagnet device is water, the electrical component only has an electromagnetic coil, the coil is sealed in the closed space of the electromagnetic assembly, and only an external connection wire of the electromagnetic coil is led out of the coil, so that the underwater sealing work of the coil is reduced.
According to the embodiment, the corrugated pipe 10 drives the claw assembly to grab the end head 7, so that the purpose of providing large grabbing force by small electromagnetic force is achieved, the control rod assembly below the end head 7 is prevented from falling off during vibration, the operation is reliable, the electromagnet device can be automatically and centrally connected with the control rod assembly through the guide cylinder, and the control rod assembly can be quickly released under the condition of power failure through the arrangement of the reset spring 4.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (8)

1.一种池式低温堆控制棒驱动机构用气动卡锁装置，其特征在于：包括波纹管（10）、连杆机构、钩爪组件和端头（7）；所述波纹管（10）两端分别连接所述连杆机构和钩爪组件；所述钩爪组件包括筒体（8）和钩爪（6）；所述钩爪（6）通过销轴（13）安装于所述筒体（8）上；所述连杆机构包括中心连杆（9）和第一连杆（5）；所述第一连杆（5）两端分别与所述中心连杆（9）和所述钩爪（6）的端部铰接；所述中心连杆（9）与所述波纹管（10）连接；所述筒体（8）上设置用于所述中心连杆（9）穿过的对中孔；所述钩爪组件与所述连杆机构之间设置有复位弹簧（4）；所述钩爪（6）还与所述连杆机构连接；所述波纹管（10）长度变化使所述连杆机构作用于所述钩爪组件以使所述钩爪组件的钩爪（6）在所述连杆机构的驱动下绕所述销轴（13）转动以抓住/松开所述端头（7）。1. A pneumatic locking device for a control rod drive mechanism of a pool-type low-temperature reactor, characterized in that it comprises a bellows (10), a connecting rod mechanism, a hook assembly and an end (7); the two ends of the bellows (10) are respectively connected to the connecting rod mechanism and the hook assembly; the hook assembly comprises a cylinder (8) and a hook (6); the hook (6) is mounted on the cylinder (8) through a pin (13); the connecting rod mechanism comprises a central connecting rod (9) and a first connecting rod (5); the two ends of the first connecting rod (5) are respectively connected to the central connecting rod (9) and the hook (6) is hinged at its end; the central connecting rod (9) is connected to the bellows (10); a centering hole for the central connecting rod (9) to pass through is provided on the cylinder (8); a return spring (4) is provided between the hook claw assembly and the connecting rod mechanism; the hook claw (6) is also connected to the connecting rod mechanism; the change in the length of the bellows (10) causes the connecting rod mechanism to act on the hook claw assembly so that the hook claw (6) of the hook claw assembly rotates around the pin shaft (13) under the drive of the connecting rod mechanism to grasp/release the end head (7). 2.如权利要求1所述的池式低温堆控制棒驱动机构用气动卡锁装置，其特征在于：所述钩爪组件还包括上盖（2）；所述上盖（2）与所述筒体（8）固定连接；所述波纹管（10）与所述上盖（2）连接。2. The pneumatic locking device for a control rod drive mechanism of a pool-type low-temperature reactor according to claim 1, characterized in that: the hook assembly further comprises an upper cover (2); the upper cover (2) is fixedly connected to the cylinder (8); and the bellows (10) is connected to the upper cover (2). 3.如权利要求2所述的池式低温堆控制棒驱动机构用气动卡锁装置，其特征在于：还包括外筒壁（1）；所述筒体（8）设置于外筒壁（1）内且能够沿所述外筒壁（1）移动；所述筒体（8）的尺寸与所述外筒壁（1）尺寸匹配。3. The pneumatic locking device for the control rod drive mechanism of a pool-type low-temperature reactor according to claim 2, characterized in that: it also includes an outer cylinder wall (1); the cylinder body (8) is arranged in the outer cylinder wall (1) and can move along the outer cylinder wall (1); the size of the cylinder body (8) matches the size of the outer cylinder wall (1). 4.如权利要求3所述的池式低温堆控制棒驱动机构用气动卡锁装置，其特征在于：所述上盖（2）上还设置有利于所述钩爪组件移动的滚轮（3），所述滚轮数量为2-4个，均匀设置在所述筒体（8）周围。4. The pneumatic locking device for a control rod drive mechanism of a pool-type low-temperature reactor as claimed in claim 3, characterized in that: the upper cover (2) is also provided with rollers (3) that facilitate the movement of the hook assembly, and the number of the rollers is 2-4, which are evenly arranged around the cylinder (8). 5.如权利要求1-4任一所述的池式低温堆控制棒驱动机构用气动卡锁装置，其特征在于：所述筒体（8）上开有连通筒体（8）内外的孔。5. The pneumatic locking device for a control rod drive mechanism of a pool-type low-temperature reactor according to any one of claims 1 to 4, characterized in that a hole is opened on the cylinder (8) to connect the inside and outside of the cylinder (8). 6.如权利要求1所述的池式低温堆控制棒驱动机构用气动卡锁装置，其特征在于：所述复位弹簧（4）数量为1-4个，设置在所述筒体（8）的中心轴线或分度圆上。6. The pneumatic locking device for a control rod drive mechanism of a pool-type low-temperature reactor according to claim 1, characterized in that: the number of the return springs (4) is 1-4, and they are arranged on the central axis or the pitch circle of the cylinder (8). 7.如权利要求1所述的池式低温堆控制棒驱动机构用气动卡锁装置，其特征在于：所述钩爪组件钩爪数量为2-3个。7. The pneumatic locking device for the control rod drive mechanism of a pool-type low-temperature reactor according to claim 1, characterized in that the number of hooks in the hook assembly is 2-3. 8.如权利要求1-4任一所述的池式低温堆控制棒驱动机构用气动卡锁装置，其特征在于：所述端头（7）上设置有与所述钩爪组件配合的止挡台阶。8. The pneumatic locking device for a control rod drive mechanism of a pool-type low-temperature reactor according to any one of claims 1 to 4, characterized in that a stop step cooperating with the hook assembly is provided on the end head (7).
CN201811342555.9A 2018-11-12 2018-11-12 A pneumatic locking device for a control rod drive mechanism of a pool-type cryogenic reactor Active CN109360668B (en)

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CN112837832B (en) * 2020-12-30 2023-05-23 中国原子能科学研究院 Rotary type material-changing special structure for changing outer sleeve of control rod assembly

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