Cyclic bridging device of pebble-bed reactor fuel element pipelines

A fuel element and reactor technology, which is applied in the field of a pebble bed reactor fuel element pipeline circulation bridge device, can solve the problems of reducing equipment utilization rate, reducing the total amount of core circulation, etc., and achieves the effect of improving operation reliability

Inactive Publication Date: 2011-08-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The old-fashioned pebble bed reactor fuel element circulation loop is not designed with a bridging device, and each loop operates in a closed loop by itself. When a device in a single loop fails, this loop will stop circulating, and the rest of the equipment will not work even if it is normal. Reuse, as a result, reduces the total circulation of the core, reduces the utilization of equipment and the reliability of the circulation system

Method used

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  • Cyclic bridging device of pebble-bed reactor fuel element pipelines
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  • Cyclic bridging device of pebble-bed reactor fuel element pipelines

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Embodiment 1

[0048] figure 2 It is a structural schematic diagram of Embodiment 1. The pebble bed reactor fuel element pipeline circulation bridging device is composed of a bridging mechanism and a driving mechanism. The driving mechanism is installed on the guide chamber flange cover 57 of the bridging mechanism, and the outside passes through the casing of the driving mechanism. It is firmly connected with the flange cover 57 of the guide chamber, and the output shaft of the drive mechanism is connected with the main drive shaft 17 of the bridge mechanism to realize the connection between the bridge mechanism and the drive mechanism.

[0049] Figure 5 for figure 2 The A-A sectional view of the middle bridge mechanism, the bridge mechanism mainly includes a box body 23, a buffer core 21, a guide core 14, a tongue plate 19, a main drive shaft 17 and a guide chamber gland 12. The bridging mechanism is a left-right symmetrical structure with the vertical center plane B-B plane of the bo...

Embodiment 2

[0057] The schematic diagram of embodiment 2 is as figure 1 with image 3 As shown, the pebble bed reactor fuel element pipeline magnetic transmission cycle bridge device is divided into three parts: the bridge connection mechanism, the magnetic force transmission mechanism and the driving mechanism from the back to the front. The magnetic transmission mechanism is installed on the box body 23 of the bridge mechanism, and the sleeve 6 of the magnetic force transmission mechanism covers the guide chamber gland 12 of the bridge mechanism on the outside and is fixedly connected with the box body 23, and the inner magnetic rotor of the magnetic force transmission mechanism The rotating shaft 91 is fixed coaxially with the main drive shaft 17 of the bridge mechanism to realize the connection between the bridge mechanism and the magnetic drive mechanism. The driving mechanism is installed on the flange plate 5 of the magnetic transmission mechanism, the outside is fixedly connected...

Embodiment 3

[0062] Figure 4 It is the elevation sectional view of the pebble bed reactor fuel element pipeline circulating magnetic drive bridge connection device of embodiment 3. Compared with embodiment 2, the biggest difference is that the magnetic drive mechanism is a double cylinder structure. In the magnetic drive mechanism, the inner and outer The magnetic rotor adopts a cylindrical shape, which is suitable for occasions with high working pressure requirements. The pebble bed reactor fuel element pipeline magnetic transmission circulation bridge device is divided into three parts from the back to the front, the bridge connection mechanism, the magnetic force transmission mechanism and the drive mechanism. The magnetic force transmission mechanism is installed on the box body 23 of the bridge connection mechanism. The sleeve 6 of the transmission mechanism covers the guide chamber gland 12 of the bridging mechanism and is fixedly connected with the box body 23, and the inner magnet...

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Abstract

The invention belongs to the technical field of nuclear reactor fuel element conveying, in particular to a cyclic bridging device of pebble-bed reactor fuel element pipelines. The device is successively provided with a bridging mechanism, a magnetic transmission mechanism and a driving mechanism from the back to the front. The box body is provided with a cushion chamber and a guide chamber. A cushion core is arranged in the cushion chamber. A guide core is arranged in the guide chamber. A main transmission shaft of a mounting tongue plate is connected with a rotating shaft of an internal magnetic rotor. A rotating shaft of an external magnetic rotor is connected with an output shaft of the driving mechanism. The tongue plate can rotate to the left limitation position or the right limitation position from the central position under the action of the magnetic transmission between the internal magnetic rotor and the magnetic rotor so as to realize a ball distributing function. The deviceis applied to a pebble-bed reactor fuel element multi-channel cyclic pipeline system, realizes a plurality of cyclic operation modes of fuel elements and improves the reliability of the cyclic system; the sealing structure of magnetic transmission realizes atmosphere isolation; the device is simple in structure, convenient to control, and suitable for the nuclear reactor with the requirement for high-security and high-reliability operation.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor fuel element delivery, and in particular relates to a pebble bed reactor fuel element pipe circulation bridge connection device. Background technique [0002] The modular high-temperature pebble bed gas-cooled reactor is a new type of nuclear reactor with fourth-generation characteristics currently being researched and developed. The core fuel element is processed into a spherical shape with an outer diameter of about 60mm. The pebble bed reactor adopts the cycle operation mode in which the fuel elements pass through the stack multiple times. This operation mode is realized by means of the important subsystem of the pebble bed stack—the fuel element circulation system. The fuel elements are discharged from the bottom of the core through the unloading device. After entering the pipeline transportation system, after buffering, fuel measurement, counting, pneumatic lifting and other processes...

Claims

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Application Information

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IPC IPC(8): G21C19/00G21C19/20
CPCY02E30/30
Inventor 曾凯沈鹏都东林峰韩赞东张文增
Owner TSINGHUA UNIV
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