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CN105609147A - System for helium charging and plug pressing of fuel rods of fast reactor - Google Patents

System for helium charging and plug pressing of fuel rods of fast reactor Download PDF

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Publication number
CN105609147A
CN105609147A CN201511000583.9A CN201511000583A CN105609147A CN 105609147 A CN105609147 A CN 105609147A CN 201511000583 A CN201511000583 A CN 201511000583A CN 105609147 A CN105609147 A CN 105609147A
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obturator
tamponade
cylinder
helium
cladding tube
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CN105609147B (en
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于团结
刘志芳
杨孔雳
朱清
陈辉
张志鹏
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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
    • G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
    • G21C21/02—Manufacture of fuel elements or breeder elements contained in non-active casings
    • 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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Basic Packing Technique (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

本发明属于反应堆工程技术领域，公开了一种用于快堆燃料棒充氦压塞的系统。该系统包括机架及位于机架一侧的压塞装置、密闭装置及夹紧装置；该系统竖直放置于手套箱内，压塞装置位于密闭装置上方，密闭装置位于夹紧装置上方；该系统采用气缸作用动力源，人工辅助完成包壳管充氦压塞；该系统具有使包壳管真空度高、氦气利用率高且上端塞压入效率高的优点。

The invention belongs to the technical field of reactor engineering, and discloses a system for fast reactor fuel rod helium-filled plugging. The system includes a frame and a plugging device, a sealing device and a clamping device on one side of the frame; the system is placed vertically in the glove box, the plugging device is located above the sealing device, and the sealing device is located above the clamping device; The system uses a cylinder as a power source, and manually assists in filling the cladding tube with helium and pressing the plug; this system has the advantages of high vacuum degree of the cladding tube, high utilization rate of helium gas, and high efficiency of pressing the upper end plug.

Description

一种用于快堆燃料棒充氦压塞的系统A system for fast reactor fuel rods filled with helium plug

技术领域technical field

本发明属于反应堆工程技术领域，具体涉及一种用于快堆燃料棒充氦压塞的系统。The invention belongs to the technical field of reactor engineering, and in particular relates to a system for fast reactor fuel rod helium filling plugging.

背景技术Background technique

快堆燃料棒的生产过程中需要往包壳管的管腔中装入芯块并在抽真空后充入一定压力的氦气，充入氦气后还需要将上端塞压入包壳管管腔。由于包壳管管径小只有6～7mm，因此充氦难度大且对压塞的同轴度及密封性要求均很高。现有的将上端塞压入包壳管是在手套箱内完成，由于手套箱空间较大，真空度难以保证、效率较低，直接影响了压塞质量。因此，需要一种包壳管真空度高、氦气利用率高且上端塞压入效率高的充氦压塞装置。During the production process of fast reactor fuel rods, it is necessary to put pellets into the lumen of the cladding tube and fill it with a certain pressure of helium after vacuuming. After filling the helium, it is necessary to press the upper end plug into the cladding tube cavity. Since the diameter of the cladding tube is as small as 6-7mm, it is difficult to fill helium and the coaxiality and sealing performance of the plugging are very high. In the prior art, pressing the upper end plug into the cladding tube is completed in the glove box. Due to the large space of the glove box, it is difficult to guarantee the vacuum degree and the efficiency is low, which directly affects the quality of the plugging. Therefore, there is a need for a helium-filled plugging device with a high vacuum degree of the cladding tube, a high utilization rate of helium gas, and a high efficiency of pressing the upper end plug.

发明内容Contents of the invention

(一)发明目的(1) Purpose of the invention

根据现有技术所存在的问题，本发明提供了一种包壳管真空度高、氦气利用率高且上端塞压入效率高的快堆燃料棒充氦压塞的系统。According to the problems existing in the prior art, the present invention provides a helium-filled tampon system for fast reactor fuel rods with high cladding tube vacuum, high helium utilization rate and high upper end plug press-in efficiency.

(二)技术方案(2) Technical solution

一种用于快堆燃料棒充氦压塞的系统，该系统包括机架及位于机架一侧的压塞装置、密闭装置及夹紧装置；该系统竖直放置于手套箱内，压塞装置位于密闭装置上方，密闭装置位于夹紧装置上方；该系统采用气缸作用动力源，人工辅助完成包壳管充氦压塞；A system for helium-filled plugging of fast reactor fuel rods, the system includes a frame and a plugging device located on one side of the frame, a sealing device and a clamping device; the system is vertically placed in a glove box, and the plugging The device is located above the sealing device, and the sealing device is located above the clamping device; the system uses a cylinder to act as a power source, and manually assists in filling the cladding tube with helium and plugging;

所述机架上安装有导向轴，该导向轴便于压塞装置与密闭装置在导向轴上水平滑动；A guide shaft is installed on the frame, and the guide shaft is convenient for the plugging device and the sealing device to slide horizontally on the guide shaft;

所述夹紧装置用于在包壳管装入芯块及压入上端塞过程中对包壳管进行夹紧，其包括夹紧气缸、压板、夹紧块及限位板，压板在夹紧气缸及弹簧的带动下可上下移动以对包壳管进行夹紧或松开；其中夹紧块和夹紧气缸分别位于压板的两端，且夹紧块的材质为弹性较小的非金属材料；夹紧块分为上夹紧块和下夹紧块，并且上夹紧块和下夹紧块的对应面设置有与包壳管相适应的圆弧槽，防止将包壳管压变形；限位板用于包壳管轴向定位；The clamping device is used to clamp the cladding tube during the process of loading the cladding tube into the core block and pressing the upper end plug. It includes a clamping cylinder, a pressing plate, a clamping block and a limit plate. Driven by the cylinder and the spring, it can move up and down to clamp or loosen the cladding tube; the clamping block and the clamping cylinder are respectively located at both ends of the pressure plate, and the material of the clamping block is a non-metallic material with less elasticity The clamping block is divided into an upper clamping block and a lower clamping block, and the corresponding surfaces of the upper clamping block and the lower clamping block are provided with arc grooves compatible with the cladding tube to prevent the cladding tube from being deformed by compression; The limiting plate is used for the axial positioning of the cladding tube;

所述密闭装置包括下密闭气缸、密闭体，其中密闭体的中心留有与包壳管管径相适应的包壳管通道，且密闭体的上下两端均安装有密封圈；下密闭气缸向上移动压至密闭体下端的密封圈将其挤压变形将密闭体下方密封，密闭体内部还安装有沿轴向均匀分布的3个钢球，每个钢球后面均安装有弹簧，钢球通过该弹簧与密闭体连接并且使钢球沿径向移动；进行上端塞压塞操作前将上端塞放置于3个钢球之间的缝隙处；The airtight device includes a lower airtight cylinder and an airtight body, wherein the center of the airtight body is provided with a cladding pipe channel suitable for the diameter of the cladding pipe, and sealing rings are installed at the upper and lower ends of the airtight body; the lower airtight cylinder is upward Move the sealing ring pressed to the lower end of the closed body to squeeze and deform it to seal the bottom of the closed body. Three steel balls evenly distributed along the axial direction are installed inside the closed body. A spring is installed behind each steel ball, and the steel ball passes through the The spring is connected to the closed body and moves the steel ball radially; before performing the operation of pressing the upper end plug, place the upper end plug in the gap between the three steel balls;

所述压塞装置包括上密闭气缸、压塞气缸、推杆、压杆、密封体；推杆位于上密闭气缸下方，上密闭气缸带动推杆下移将密闭体上端的密封圈挤压变形从而将整个密闭体密封；密封体和推杆之间通过上压板和下压板连接，密封体为弹性材质可随推杆上下移动而不影响密封性能；压杆为由一个横向压杆和竖向压杆组成的一体化的压杆，整体为“T”字形结构，其位于压塞气缸下方，在压塞气缸带动下移动，其中竖向压杆穿过密封体并可在压塞气缸的带动下下行至密闭体的包壳管通道内对包壳管进行压塞操作；The plugging device includes an upper airtight cylinder, a plugging cylinder, a push rod, a pressing rod, and a sealing body; Seal the entire sealing body; the sealing body and the push rod are connected by the upper pressing plate and the lower pressing plate, the sealing body is made of elastic material and can move up and down with the pushing rod without affecting the sealing performance; the pressing rod is composed of a horizontal pressing rod and a vertical pressing The integrated pressure rod composed of rods has a "T"-shaped structure as a whole. It is located under the plugging cylinder and moves under the driving of the plugging cylinder. The vertical pressure rod passes through the sealing body and can be driven by the plugging cylinder. Going down to the cladding tube channel of the closed body to perform plugging operation on the cladding tube;

优选地，密闭装置上还设置有KF接头，密闭装置通过该接头与真空泵连接。Preferably, the sealing device is further provided with a KF joint, through which the sealing device is connected with the vacuum pump.

优选地，所述机架的材质为不锈钢。Preferably, the frame is made of stainless steel.

优选地，上夹紧块和下夹紧块的材质为电木。Preferably, the material of the upper clamping block and the lower clamping block is Bakelite.

优选地，所述机架上导向轴的一侧安装有将压塞装置和密闭装置限位的限位装置。Preferably, a limiting device for limiting the plugging device and the sealing device is installed on one side of the guide shaft on the frame.

利用该充氦压塞装置对包壳管进行芯块填装及充氦压塞时，其采取的步骤是：When using the helium-filled plugging device to fill the cladding tube with pellets and helium-filled plugging, the steps to be taken are:

(1)将压塞装置和密闭装置沿着导向轴移动为芯块填装留出空间，然后将包壳管的上端置入夹紧装置上夹紧块和下夹紧块之间的圆弧槽内，夹紧气缸动作带动压板将包壳管夹紧；(1) Move the plugging device and the sealing device along the guide shaft to leave space for the core block filling, and then put the upper end of the cladding tube into the arc between the upper clamping block and the lower clamping block of the clamping device In the groove, the action of the clamping cylinder drives the pressure plate to clamp the cladding tube;

(2)向包壳管内装入芯块；(2) Pellets are loaded into the cladding tube;

(3)将密闭装置沿着导向轴移动到右限位装置，包壳管通道与夹紧装置上的包壳管对齐，将上端塞放入密闭体钢球之间的缝隙处；(3) Move the sealing device to the right limit device along the guide shaft, align the cladding tube channel with the cladding tube on the clamping device, and put the upper end plug into the gap between the steel balls of the sealing body;

(4)将压塞装置沿着导向轴移动到右限位装置，压杆与与密闭装置内的包壳管通道对齐，夹紧气缸动作将压杆下移，将包壳管松开；(4) Move the plugging device to the right limit device along the guide shaft, the pressing rod is aligned with the cladding tube channel in the sealing device, and the clamping cylinder moves the pressing rod down to loosen the cladding tube;

(5)将包壳管上移至密闭体钢球处，钢球后移，包壳管上端达到压塞位置；(5) Move the cladding tube up to the steel ball of the closed body, move the steel ball backward, and the upper end of the cladding tube reaches the plugging position;

(6)下密闭气缸向上移动压至密闭体下端的密封圈将其挤压变形将密闭体下方密封，上密闭气缸带动推杆下移将密闭体上端的密封圈挤压变形将整个密闭体密封；(6) The lower airtight cylinder moves upwards and presses the sealing ring at the lower end of the airtight body to squeeze and deform it to seal the bottom of the airtight body, and the upper airtight cylinder drives the push rod to move down to squeeze and deform the sealing ring at the upper end of the airtight body to seal the entire airtight body ;

(7)通过KF接头对密闭体抽真空，充氦气；抽真空压力小于10Pa，充氦气的压力为1.1atm～1.3atm；(7) Vacuumize the closed body through the KF joint and fill it with helium; the vacuum pressure is less than 10Pa, and the pressure of helium filling is 1.1atm to 1.3atm;

(8)压塞气缸动作带动压杆向下移动至密闭体内，将上端塞压入包壳管内。(8) The action of the plugging cylinder drives the pressing rod to move down into the airtight body, and the upper end plug is pressed into the cladding tube.

(三)有益效果(3) Beneficial effects

本装置提供的充氦压塞系统可以实现对燃料棒进行芯块填装、充入氦气并压入上端塞，具有真空度较易保证、压塞效率和压塞质量高的有益效果。具体解释为：The helium-filled plugging system provided by the device can realize pellet filling of fuel rods, filling helium gas and pressing into the upper end plug, which has the beneficial effects of easy guarantee of vacuum degree, high plugging efficiency and plugging quality. Specifically explained as:

(1)传统的充氦压塞操作是直接在手套箱内进行的，由于手套箱空间较大，真空度难以保证且充氦效率低。本申请充氦和压入上端塞的过程是在密闭体内设置的包壳管通道内完成的(该通道直径与包壳管外径相适配)，真空度容易保证、抽真空所需时间大为缩短，且充氦效率大大提高。(1) The traditional helium-filled plugging operation is carried out directly in the glove box. Due to the large space of the glove box, it is difficult to guarantee the vacuum degree and the efficiency of helium filling is low. In this application, the process of filling helium and pressing the upper end plug is completed in the cladding tube channel provided in the closed body (the diameter of the channel is compatible with the outer diameter of the cladding tube), the vacuum degree is easy to ensure, and the time required for vacuuming is long In order to shorten, and helium filling efficiency is greatly improved.

(2)密闭体内设置的包壳管通道与包壳管外径相适配，不但利于提高真空度和充氦效率，更重要的一点是易于压塞定位操作。由于包壳管伸入至密闭体的通道内，上端塞放置于密闭体内设置的钢球上方，压塞时，包壳管上移至达到上端塞处，便于压塞装置对其进行精确定位并压塞。(2) The cladding tube channel provided in the airtight body is compatible with the outer diameter of the cladding tube, which not only helps to improve the vacuum degree and helium filling efficiency, but also facilitates the plugging and positioning operation. Since the cladding tube extends into the channel of the closed body, the upper end plug is placed above the steel ball set in the closed body. When plugging, the cladding tube moves up to reach the upper end plug, which is convenient for the plugging device to accurately locate it and Cork.

附图说明Description of drawings

图1是燃料棒充氦压塞系统示意图；其中1机架；2是压塞装置；3是密闭装置；4是夹紧装置；Fig. 1 is a schematic diagram of a fuel rod helium filling plugging system; wherein 1 frame; 2 is a plugging device; 3 is a sealing device; 4 is a clamping device;

图2是夹紧装置示意图；其中5是夹紧气缸；6是弹簧；7是压板；8是夹紧块；Fig. 2 is a schematic diagram of the clamping device; wherein 5 is a clamping cylinder; 6 is a spring; 7 is a pressure plate; 8 is a clamping block;

图3是密闭装置示意图；其中9是支座；10是上密封圈；11是钢球；12是密闭体；13是下密封圈；Fig. 3 is a schematic diagram of an airtight device; wherein 9 is a support; 10 is an upper sealing ring; 11 is a steel ball; 12 is an airtight body; 13 is a lower sealing ring;

图4是压塞装置示意图；其中14是压塞气缸；15是上密闭气缸；16是推杆；17是上压板；18是压杆；19是密封体，20是下压板。Fig. 4 is a schematic view of the plugging device; wherein 14 is a plugging cylinder; 15 is an upper airtight cylinder; 16 is a push rod; 17 is an upper pressing plate; 18 is a pressing rod; 19 is a sealing body, and 20 is a lower pressing plate.

具体实施方式detailed description

下面将结合说明书附图和具体实施方式对本发明作进一步阐述。The present invention will be further elaborated below in combination with the accompanying drawings and specific embodiments.

一种用于快堆燃料棒充氦压塞的系统，该系统包括机架1及位于机架一侧的压塞装置2、密闭装置3及夹紧装置4；该系统竖直放置于手套箱内，压塞装置2位于密闭装置3上方，密闭装置3位于夹紧装置4上方；该系统采用气缸作用动力源，人工辅助完成包壳管充氦压塞；A system for helium-filled plugging of fast reactor fuel rods, the system includes a frame 1 and a plugging device 2 located on one side of the frame, a sealing device 3 and a clamping device 4; the system is vertically placed in a glove box Inside, the plugging device 2 is located above the sealing device 3, and the sealing device 3 is located above the clamping device 4; the system uses a cylinder as a power source, and manually assists in filling the cladding tube with helium and plugging;

所述机架1的材质为不锈钢，机架1上安装有导向轴，该导向轴便于压塞装置2与密闭装置3在导向轴上水平滑动。所述机架1上安装有将压塞装置和密闭装置限位的限位装置。The frame 1 is made of stainless steel, and a guide shaft is installed on the frame 1, and the guide shaft is convenient for the plugging device 2 and the sealing device 3 to slide horizontally on the guide shaft. The frame 1 is equipped with a limiting device for limiting the plugging device and the sealing device.

所述夹紧装置4用于在包壳管装入芯块及压入上端塞过程中对包壳管进行夹紧，其包括夹紧气缸5、压板7、夹紧块8及限位板，压板7在夹紧气缸5及弹簧6的带动下可上下移动以对包壳管进行夹紧或松开；其中夹紧块8和夹紧气缸5分别位于压板7的两端，且夹紧块8的材质为弹性较小的非金属材料；夹紧块8分为上夹紧块和下夹紧块，并且上夹紧块和下夹紧块的对应面设置有与包壳管相适应的圆弧槽，防止将包壳管压变形；限位板用于包壳管轴向定位；上夹紧块和下夹紧块的材质为电木。The clamping device 4 is used to clamp the cladding tube during the process of loading the cladding tube into the core block and pressing the upper end plug, which includes a clamping cylinder 5, a pressing plate 7, a clamping block 8 and a limit plate, The pressure plate 7 can move up and down under the drive of the clamping cylinder 5 and the spring 6 to clamp or loosen the cladding tube; wherein the clamping block 8 and the clamping cylinder 5 are respectively located at the two ends of the pressure plate 7, and the clamping block The material of 8 is a non-metallic material with less elasticity; the clamping block 8 is divided into an upper clamping block and a lower clamping block, and the corresponding surfaces of the upper clamping block and the lower clamping block are provided with fittings suitable for the cladding tube. The arc groove prevents the cladding tube from being compressed and deformed; the limit plate is used for the axial positioning of the cladding tube; the material of the upper clamping block and the lower clamping block is Bakelite.

所述密闭装置3包括下密闭气缸、密闭体12，其中密闭体12的中心留有与包壳管管径相适应的包壳管通道，且密闭体的上下两端均安装有密封圈；下密闭气缸向上移动压至密闭体12下端的下密封圈13将其挤压变形将密闭体下方密封，密闭体12内部还安装有沿轴向均匀分布的3个钢球11，每个钢球后面均安装有弹簧，钢球通过该弹簧与密闭体12连接并且使钢球11沿径向移动；进行上端塞压塞操作前将上端塞放置于3个钢球之间的缝隙处；密闭装置3上还设置有KF接头，密闭装置通过该接头与真空泵连接。The airtight device 3 comprises a lower airtight cylinder and an airtight body 12, wherein the center of the airtight body 12 has a cladding tube passage adapted to the diameter of the cladding tube, and sealing rings are installed at the upper and lower ends of the airtight body; The airtight cylinder moves upwards and presses to the lower sealing ring 13 at the lower end of the airtight body 12 to squeeze and deform it to seal the bottom of the airtight body. Three steel balls 11 evenly distributed along the axial direction are installed inside the airtight body 12. Behind each steel ball All are equipped with springs, through which the steel balls are connected with the sealing body 12 and the steel balls 11 are moved radially; the upper end plug is placed in the gap between the three steel balls before the upper end plug pressing operation; the sealing device 3 There is also a KF joint on the top, through which the sealing device is connected with the vacuum pump.

所述压塞装置包括上密闭气缸15、压塞气缸14、推杆16、压杆18、密封体19；推杆16位于上密闭气缸15下方，上密闭气缸15带动推杆16下移将密闭体上端的上密封圈10挤压变形从而将整个密闭体12密封；密封体19和推杆16之间通过上压板和下压板连接，密封体19为弹性材质可随推杆16上下移动而不影响密封性能；压杆18为由一个横向压杆和竖向压杆组成的一体化的压杆，整体为“T”字形结构，其位于压塞气缸14下方，在压塞气缸14带动下移动，其中竖向压杆穿过密封体19并可在压塞气缸14的带动下下行至密闭体12的包壳管通道内对包壳管进行压塞操作；The plugging device includes an upper airtight cylinder 15, a plugging cylinder 14, a push rod 16, a depression rod 18, and a sealing body 19; The upper sealing ring 10 at the upper end of the body is extruded and deformed so as to seal the entire closed body 12; the sealing body 19 and the push rod 16 are connected by an upper platen and a lower platen, and the sealing body 19 is made of elastic material and can move up and down with the push rod 16 without Affect the sealing performance; the pressure rod 18 is an integrated pressure rod composed of a horizontal pressure rod and a vertical pressure rod. , wherein the vertical pressing rod passes through the sealing body 19 and can be driven by the plugging cylinder 14 to go down to the cladding tube channel of the sealing body 12 to perform plugging operation on the cladding tube;

利用该充氦压塞装置对包壳管进行芯块填装及充氦压塞时，其采取的步骤是：When using the helium-filled plugging device to fill the cladding tube with pellets and helium-filled plugging, the steps to be taken are:

(1)将压塞装置和密闭装置沿着导向轴移动为芯块填装留出空间，然后将包壳管的上端置入夹紧装置上夹紧块和下夹紧块之间的圆弧槽内，夹紧气缸动作带动压板将包壳管夹紧；(1) Move the plugging device and the sealing device along the guide shaft to leave space for the core block filling, and then put the upper end of the cladding tube into the arc between the upper clamping block and the lower clamping block of the clamping device In the groove, the action of the clamping cylinder drives the pressure plate to clamp the cladding tube;

(2)向包壳管内装入芯块；(2) Pellets are loaded into the cladding tube;

(3)将密闭装置沿着导向轴移动到右限位装置，包壳管通道与夹紧装置上的包壳管对齐，将上端塞放入密闭体钢球之间的缝隙处；(3) Move the sealing device to the right limit device along the guide shaft, align the cladding tube channel with the cladding tube on the clamping device, and put the upper end plug into the gap between the steel balls of the sealing body;

(4)将压塞装置沿着导向轴移动到右限位装置，压杆与与密闭装置内的包壳管通道对齐，夹紧气缸动作将压杆下移，将包壳管松开；(4) Move the plugging device to the right limit device along the guide shaft, the pressing rod is aligned with the cladding tube channel in the sealing device, and the clamping cylinder moves the pressing rod down to loosen the cladding tube;

(5)将包壳管上移至密闭体钢球处，钢球后移，包壳管上端达到压塞位置；(5) Move the cladding tube up to the steel ball of the closed body, move the steel ball backward, and the upper end of the cladding tube reaches the plugging position;

(6)下密闭气缸向上移动压至密闭体下端的密封圈将其挤压变形将密闭体下方密封，上密闭气缸带动推杆下移将密闭体上端的密封圈挤压变形将整个密闭体密封；(6) The lower airtight cylinder moves upwards and presses the sealing ring at the lower end of the airtight body to squeeze and deform it to seal the bottom of the airtight body, and the upper airtight cylinder drives the push rod to move down to squeeze and deform the sealing ring at the upper end of the airtight body to seal the entire airtight body ;

(7)通过KF接头对密闭体抽真空，充氦气；抽真空压力小于10Pa，充氦气的压力为1.1atm～1.3atm；(7) Vacuumize the closed body through the KF joint and fill it with helium; the vacuum pressure is less than 10Pa, and the pressure of helium filling is 1.1atm to 1.3atm;

(8)压塞气缸动作带动压杆向下移动至密闭体内，将上端塞压入包壳管内。(8) The action of the plugging cylinder drives the pressing rod to move down into the airtight body, and the upper end plug is pressed into the cladding tube.

Claims (5)

1. a system of filling helium tamponade for fast reactor fuel rod, is characterized in that, this system comprises frame and positionIn tamponade device, obturator and the clamping device of frame one side; This system is vertically placed in glove box, pressesPlug device is positioned at obturator top, and obturator is positioned at clamping device top; This system adopts cylinder action movingPower source, human assistance completes cladding tubes and fills helium tamponade;
In described frame, the axis of guide is installed, this axis of guide is convenient to tamponade device and obturator water on the axis of guideLevel and smooth moving;
Described clamping device presss from both sides cladding tubes for packing pellet into and be pressed into upper end plug process at cladding tubesTightly, it comprises clamping cylinder, pressing plate, clamp and limiting plate, and pressing plate is under the drive of clamping cylinder and springCan move up and down cladding tubes is clamped or unclamp; Wherein clamp and clamping cylinder lay respectively at pressing plateTwo ends, and the material of clamp is the nonmetallic materials that elasticity is less; Clamp is divided into upper clamping block and lower clampingPiece, and the corresponding surface of upper clamping block and lower clamp is provided with the arc groove adapting with cladding tubes, prevent byCladding tubes compressive strain; Limiting plate is for cladding tubes axial location;
Described obturator comprises lower enclosed cylinder, obturator, and wherein the center of obturator is left and cladding tubes pipeThe cladding tubes passage that footpath adapts, and the two ends up and down of obturator are all provided with sealing ring; Lower enclosed cylinder upwardsThe mobile sealing ring that is depressed into obturator lower end seals its crimp by obturator below, also pacify obturator insideEqually distributed 3 steel balls are vertically housed, spring are all installed after each steel ball, steel ball is by this springBe connected with obturator and steel ball is radially moved;
Described tamponade device comprises enclosed cylinder, tamponade cylinder, push rod, depression bar, seal; Push rod is positioned atUpper enclosed cylinder below, thus upper enclosed cylinder drives push rod to move down the sealing ring crimp of obturator upper endBy whole obturator sealing; Between seal and push rod, be connected with lower platen by top board, seal is elasticityMaterial can move up and down and not affect sealing property with push rod; Depression bar is by a horizontal depression bar and vertical depression bar groupThe integrated depression bar becoming, entirety is " T " character form structure, it is positioned at tamponade cylinder below, at tamponade cylinderDrive down mobile, wherein vertical depression bar is through seal and can come downwards to obturator under the drive of tamponade cylinderIn cladding tubes passage, cladding tubes is carried out to tamponade operation.
2. a kind of system of filling helium tamponade for fast reactor fuel rod according to claim 1, is characterized in that,On obturator, be also provided with KF joint, obturator is connected with vavuum pump by this joint.
3. a kind of system of filling helium tamponade for fast reactor fuel rod according to claim 1, is characterized in that,The material of described frame is stainless steel.
4. a kind of system of filling helium tamponade for fast reactor fuel rod according to claim 1, is characterized in that,The material of upper clamping block and lower clamp is bakelite.
5. a kind of system of filling helium tamponade for fast reactor fuel rod according to claim 1, is characterized in that,In described frame, a side of the axis of guide is provided with tamponade device and the spacing stopping means of obturator.
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