阅读说明：本技术 一种中子通量管端部切割、成型手持式在线加工装置 (Handheld online processing device for cutting and forming end part of neutron flux tube ) 是由 王成林 代巍巍 陆少威 戚宏昶 陆蕾 翁云峰 张铭刻 王海南 施靖峰 袁佳 于 2018-08-17 设计创作，主要内容包括：本发明涉及核电站维修技术领域,具体涉及一种适用于核电站反应堆中子通量管端部切割、成型在线加工装置,主要解决了指套管端部切割、成型加工工艺复杂,操作难度大的问题。本发明是由夹持装置、刀架、驱动装置三部分组成,其中,刀架部件两端固定连接夹持装置和轴向进给装置,轴向进给装置另一端连接驱动装置。夹持装置包括：支撑架、连接盘、夹持头。刀架包括：连接架、轴向进给环、刀柄、坡口刀和断面刀。刀架固定连接夹持装置和驱动装置。驱动装置包括：电机、外壳以及锂电池。本发明切割、成型加工后指套管端面平整垂直度、焊接坡口形式、圆柱度、同轴度、表面光洁度等均能满足要求,可完全替代手工操作。(The invention relates to the technical field of nuclear power station maintenance, in particular to an online processing device for cutting and molding an end part of a neutron flux tube in a nuclear power station reactor, and mainly solves the problems of complex cutting and molding processing technology and high operation difficulty of the end part of a fingerstall. The invention is composed of a clamping device, a tool rest and a driving device, wherein two ends of the tool rest component are fixedly connected with the clamping device and an axial feeding device, and the other end of the axial feeding device is connected with the driving device. The clamping device comprises: support frame, connection pad, clamping head. The tool holder includes: the connecting frame, axial feed ring, handle of a knife, groove sword and section sword. The tool rest is fixedly connected with the clamping device and the driving device. The drive device includes: motor, shell and lithium cell. The end surface of the cut and formed fingerstall can meet the requirements of flatness and verticality, welding groove form, cylindricity, coaxiality, surface finish and the like, and can completely replace manual operation.)

1. A handheld online processing device for cutting and forming ends of neutron flux tubes comprises: clamping device (2), knife rest (3), axial feed device (4), drive arrangement (5), its characterized in that: the two ends of the tool rest (3) are fixedly connected with the clamping device (2) and the axial feeding device (4), and the other end of the axial feeding device (4) is connected with the driving device (5).

2. The neutron flux tube end cutting and forming hand-held in-line processing device of claim 1, wherein: the clamping device comprises: a support frame (6), a connecting disc (7) and a clamping head (8); the support frame (6) is a hollow cylinder externally connected with an X-shaped handle, the connecting disc (7) is a circular ring, the outer diameter of the hollow cylinder is smaller than that of the connecting disc (7), and the inner diameters of the hollow cylinder and the connecting disc are the same.

3. The neutron flux tube end cutting and forming hand-held in-line processing device of claim 2, wherein: the clamping head (8) is of a split structure, the inner diameter of the clamping head is the same as the outer diameter of the neutron flux tube, the clamping device is provided with a locking device, and the neutron flux tube is clamped through the locking device.

4. The neutron flux tube end cutting and forming hand-held in-line processing device of claim 2, wherein: the supporting frame (6) is connected with the connecting disc (7), and the clamping head (8) is embedded and connected in the connecting disc (7) and extends out of the hollow cylinder of the supporting frame (6).

5. The neutron flux tube end cutting and forming hand-held in-line processing device of claim 1, wherein: the tool holder (3) comprises: the device comprises a connecting frame (9), a cutter handle (11), a beveling cutter (12) and a section cutter (13); one end of the connecting frame (9) is connected with the connecting disc (7), and the other end of the connecting frame is connected with one end of the axial feeding device (4); the other end of the axial feeding device (4) is connected with the cutter handle (11), and the other end of the cutter handle (11) is provided with a 45-degree beveling cutter (12) and a section cutter (13).

6. The neutron flux tube end cutting and forming hand-held in-line processing device of claim 5, wherein: and two ends of the tool rest (3) are fixedly connected with the clamping device (2) and the driving device (5).

7. The neutron flux tube end cutting and forming hand-held in-line processing device of claim 1, wherein: the driving device comprises: comprises a motor (14), a shell and a lithium battery (15). The whole T type structure that is of drive arrangement, motor (14) are installed at the top, and lithium cell (15) are installed in the bottom, and motor (14) and lithium cell (15) circuit connection, motor (14) and lithium cell (15) are equipped with the shell outward.

Technical Field

The invention relates to the technical field of nuclear power station maintenance, in particular to a handheld online processing device for cutting and forming an end part of a neutron flux tube, which is suitable for a nuclear power station reactor.

Background

The neutron flux tubes of the reactor of the pressurized water reactor nuclear power plant are commonly called as sleeves, are one of key devices of the pressurized water reactor nuclear power plant, the number of the neutron flux tubes is different when the reactor is different in size, and the number of the neutron flux tubes of a conventional reactor type single unit is 20-50. As a measuring channel of neutron flux of the reactor core nuclear measuring system, neutron flux tubes are uniformly distributed in a reactor core fuel assembly channel, penetrate through fuel assemblies and are exposed in a reactor core. Neutron flux tubes are a primary circuit pressure boundary because mechanical wear caused by radiation embrittlement and flow-induced vibration can cause the tube walls to be thinned and even damaged, thereby causing leakage and contamination of the primary circuit coolant.

Taking a 1000MWe nuclear power plant as an example, a single unit has 50 neutron flux tubes, and the length of each unit is 13-18 meters. From experience feedback at home and abroad, due to the large coolant loading of a primary circuit of a 1000MWe nuclear power plant and the complex thermal hydraulic characteristics, the neutron flux tube replacement work is widely carried out, and the requirement on spare parts of the neutron flux tube is strong.

Because every neutron flux tube length differs, nuclear power plant can't be reserve according to the longest dimension to each neutron flux tube spare part deposit, then carries out the preparation of spare part according to the neutron flux tube actual length that needs to change when the spare part uses. The preparation of the neutron flux tube spare parts relates to the dimension measurement, cutting, groove grinding and welding of the neutron flux tube, and the hydraulic test, nondestructive testing and the like after the preparation is finished. The nuclear power plant in China does not have the neutron flux pipe spare part preparation technology, and a series of technological innovations are generated in the original development process of the neutron flux pipe spare part preparation technology.

The neutron flux tube is installed for the first time, and in the neutron flux tube replacement process in the service life of a nuclear reactor, the end part of the fingerstall tube needs to be cut and molded, the cutting and molding processes are complex, the operation difficulty is high, spare parts of the neutron flux tube are easily damaged, or the process requirements cannot be met after the neutron flux tube is processed, so that the end part strength and the pressure resistance of the neutron flux tube are reduced. In order to improve the technological level of cutting and forming processing and avoid spare parts from being damaged, the on-line processing device of the handheld type on-line processing device for cutting and forming the end part of the neutron flux tube, which is suitable for a nuclear power station reactor, is designed and manufactured, can be used for the integral replacement of the neutron flux tube in the service period, and has positive significance for the first installation of the neutron flux tube.

Disclosure of Invention

The technical problem to be solved by the invention is as follows:

neutron flux tubes are the pressure boundary of the primary circuit of a nuclear power plant reactor, and reliable sealing is an inevitable requirement for nuclear safety. Therefore, in the process of replacing a newly-installed neutron flux tube and a power plant in service, the requirements of flatness and verticality of the end face, welding groove form, cylindricity, coaxiality, surface finish degree and the like of the processed end face of the neutron flux tube after being cut and formed by the handheld online processing device are met.

At present, the neutron flux tube in a domestic nuclear power station is cut and formed in a manual mode without any tool assistance, spare parts of the neutron flux tube are easily damaged, or the technical requirements cannot be met after processing. In order to ensure that the high standard of the processed neutron flux tube end cutting and forming handheld online processing device can meet the welding requirement, the neutron flux tube end cutting and forming handheld online processing device suitable for the nuclear power station reactor is designed and manufactured.

The technical solution of the invention is as follows:

based on the fact that the neutron flux tube end cutting and forming handheld online machining process is complex and the operation difficulty is large, the neutron flux tube end cutting and forming handheld online machining device is designed and manufactured, the device can accurately control the axial feeding size, and end face treatment and 45-degree welding groove machining of the neutron flux tube with the outer diameter being less than or equal to 10mm are completed.

A handheld online processing device for cutting and forming the end part of a neutron flux tube comprises a clamping device, a tool rest and a driving device, wherein the two ends of the tool rest component are fixedly connected with the clamping device and an axial feeding device, and the other end of the axial feeding device is connected with the driving device. The structure and function of each part will now be described as follows:

the clamping device as described above includes: support frame, connection pad, clamping head. The supporting frame is a hollow cylinder and is externally connected with an X-shaped handle, the connecting disc is a circular ring, the outer diameter of the hollow cylinder is smaller than that of the connecting disc, and the inner diameters of the hollow cylinder and the connecting disc are the same. The clamping head is of a split structure, the inner diameter of the clamping head is the same as the outer diameter of the neutron flux tube, and the clamping device is provided with a locking device which is used for clamping the neutron flux tube. The supporting frame is connected with the connecting disc, and the clamping head is embedded in the connecting disc and extends out of the hollow cylinder of the supporting frame.

The tool holder as described above comprises: the connecting frame, axial feed ring, handle of a knife, groove sword and section sword. One end of the connecting frame is connected with the connecting disc, and the other end of the connecting frame is connected with one end of the axial feeding ring. The other end of the axial feeding device is connected with the cutter handle, and the other end of the cutter handle is provided with a 45-degree beveling cutter and a section cutter. The tool rest is fixedly connected with the clamping device and the driving device.

The driving device as described above includes: motor, shell and lithium cell. The whole T type structure that is of drive arrangement, the motor is installed at the top, and the lithium cell is installed in the bottom, and motor and lithium cell circuit connect, motor and lithium cell are equipped with the shell outward.

Compared with the prior art, the invention has the beneficial effects that:

a handheld on-line machining device for cutting and forming the end part of a neutron flux tube is verified on site, can finish the cutting and forming machining functions of the end part of the neutron flux tube, can meet the requirements on the flatness and the verticality of the end surface, the welding groove form, the cylindricity, the coaxiality, the surface finish degree and the like after cutting and forming machining, and can completely replace manual operation.

Drawings

FIG. 1 is a structural diagram of a handheld on-line processing device for cutting and molding the end of a neutron flux tube

FIG. 2 is a structural view of a holding device of a handheld on-line neutron flux tube end cutting and forming device

FIG. 3 is a structural view of an axial feeding device of a handheld on-line neutron flux tube end cutting and forming device

FIG. 4 is a schematic diagram of a tool holder of a hand-held on-line neutron flux tube end cutting and forming device

FIG. 5 is a structural diagram of a driving device of a handheld on-line processing device for cutting and molding the end of a neutron flux tube

In the figure: 1. a neutron flux tube; 2. a clamping device; 3. a tool holder; 4. an axial feed device; 5. a drive device; 6. a support frame; 7. a connecting disc; 8. a clamping head; 9. a connecting frame; 11. a knife handle; 12. a 45-degree beveling cutter; 13. a noodle cutter; 14. a motor; 15. a lithium battery.

Detailed Description

The invention is described in detail below with reference to the following figures and specific embodiments:

as shown in FIG. 1, the on-line processing device of the handheld type on-line processing device for cutting and forming the end part of the neutron flux tube comprises a clamping device 2, a tool rest 3, an axial feeding device 4 and a driving device 5, wherein the clamping device 2 and the axial feeding device 4 are fixedly connected to two ends of the tool rest 3, and the driving device 5 is connected to the other end of the axial feeding device 4. The clamping device 2 is provided with a locking device, the neutron flux tube 1 is clamped through the locking device, sufficient clamping force is provided on the premise that the neutron flux tube 1 is guaranteed not to deform, the position of a cutting base line is preliminarily positioned, marks need to be made on the neutron flux tube 1 before installation, the clamping position is preliminarily positioned, and repeated disassembly and adjustment caused by the fact that the installation is not in place are avoided. The neutron flux tube 1 is arranged in the clamping device, and the handle of the locking device is rotated clockwise to be locked.

As shown in fig. 1 and 2, the clamping device includes: a support frame 6, a connecting disc 7 and a clamping head 8; the support frame 6 is a hollow cylinder externally connected with an X-shaped handle, the connecting disc 7 is a circular ring, the outer diameter of the hollow cylinder is smaller than that of the connecting disc 7, and the inner diameters of the hollow cylinder and the connecting disc are the same. The clamping head 8 is of a split structure, the inner diameter of the clamping head is the same as the outer diameter of the neutron flux tube, the clamping device is provided with a locking device, and the neutron flux tube is clamped through the locking device. The supporting frame 6 is connected with the connecting disc 7, and the clamping head 8 is embedded in the connecting disc 7 and extends out of the hollow cylinder of the supporting frame 6.

As shown in FIG. 3, the two ends of the axial feeder 11 are connected to the connecting frame 9 and the tool shank 11, respectively.

As shown in fig. 4, the tool holder 3 includes: the device comprises a connecting frame 9, a knife handle 11, a beveling knife 12 and a section knife 13; the two ends of the tool rest 3 are fixedly connected with the clamping device 2 and the driving device 5. One end of the connecting frame 9 is connected with the connecting disc 7, and the other end of the connecting frame is connected with one end of the axial feeding device 4; the other end of the axial feeding device 4 is connected with a cutter handle 11, and a 45-degree beveling cutter 12 and a section cutter 13 are arranged at the other end of the cutter handle 11. The cutter head assembled on the cutter rest 3 can realize axial manual accurate feeding, and end face treatment and 45-degree welding groove machining of the neutron flux tube are completed.

As shown in fig. 5, the driving apparatus includes: including an electric motor 14, a housing, and a lithium battery 15. The whole T type structure that is of drive arrangement, motor 14 install at the top, and lithium cell 15 installs in the bottom, and motor 14 and lithium cell 15 circuit connection, motor 14 and lithium cell 15 are equipped with the shell outward. The driving device adopts an electric motor to provide power, a power line is used for connecting and overhauling the power supply, meanwhile, the end part and the tool rest are connected through a bolt, the transmission of the power is realized, and the cutting and the processing of the end part of the neutron flux tube can be finished by the cutter.