CN108730668A - Reactor fluid power gate leakage monitoring nozzle plug and its tool specially for attaching and detaching - Google Patents
Reactor fluid power gate leakage monitoring nozzle plug and its tool specially for attaching and detaching Download PDFInfo
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- CN108730668A CN108730668A CN201810550533.5A CN201810550533A CN108730668A CN 108730668 A CN108730668 A CN 108730668A CN 201810550533 A CN201810550533 A CN 201810550533A CN 108730668 A CN108730668 A CN 108730668A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 40
- 239000012530 fluid Substances 0.000 title claims 6
- 238000007789 sealing Methods 0.000 claims abstract description 56
- 230000006835 compression Effects 0.000 abstract description 38
- 238000007906 compression Methods 0.000 abstract description 38
- 238000003825 pressing Methods 0.000 abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 abstract description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 5
- 239000004327 boric acid Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow in pipes or hoses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
本发明属于反应堆检修技术领域，具体涉及一种针对现有技术不足，提供一种实现反应堆竖井升水位期间泄漏监测管道的封堵，防止引起监测仪表误报警，同时为下游管道和阀门检修创造条件的反应堆液力闸门泄漏监测管口堵头及其拆装专用工具；包括泄漏监测管口堵头和拆装专用工具；其中所述泄漏监测管口堵头包括上部压紧构件(1)、下部压紧构件(2)、密封胶条(3)及压紧螺母(4)，其中所述上部压紧构件(1)通过压紧螺母(4)固定于下部压紧构件(2)上，所述下部压紧构件(2)与上部压紧构件(1)之间设有密封胶条(3)；所述拆装专用工具包括堵头密封与解密封扳手和堵头拆装扳手。
The invention belongs to the technical field of reactor inspection and maintenance, and specifically relates to a method for realizing the plugging of leakage monitoring pipelines during the rise of the water level in reactor shafts to prevent false alarms from monitoring instruments, and at the same time create conditions for the maintenance of downstream pipelines and valves. The reactor hydraulic gate leakage monitoring nozzle plug and its special tool for disassembly and assembly; including the leakage monitoring nozzle plug and the special tool for disassembly; wherein the leakage monitoring nozzle plug includes an upper pressing member (1), a lower Compression member (2), sealing strip (3) and compression nut (4), wherein the upper compression member (1) is fixed on the lower compression member (2) through the compression nut (4), the A sealing strip (3) is provided between the lower pressing member (2) and the upper pressing member (1); the special tool for disassembly includes a plug sealing and unsealing wrench and a plug disassembly wrench.
Description
技术领域technical field
本发明属于反应堆检修技术领域，具体涉及一种反应堆液力闸门泄漏监测管口堵头及其拆装专用工具。The invention belongs to the technical field of reactor maintenance, and in particular relates to a reactor hydraulic gate leakage monitoring nozzle plug and a special tool for disassembly and assembly thereof.
背景技术Background technique
核电站设计了堆芯捕集器用于发生概率100万年1次的堆芯烧漏事故，收集所有放射性产物防止流入环境的核电站。冷却堆芯捕集器需要1400吨硼酸水。结合核电站大修需要，机组正常运行期间位于反应堆竖井两侧的堆内构件检查井和燃料水池各容纳700吨硼酸水。机组正常运行期间采用液力闸门；反应堆竖井注水至最高允许液位。此时，液力闸门间的泄漏监测管线因未设计封堵措施，一回路硼酸水灌入泄漏监测管线将会引起监测仪表误报警。同时，泄漏监测管道内充满硼酸水将影响下游管道和阀门检修。因此，考虑各方面因素，并结合现场实际情况，开发了一种反应堆液力闸门泄漏监测管口堵头及其拆装专用工具。The nuclear power plant has designed a core trap for nuclear power plants that have a probability of once a million years for a core burnout accident to collect all radioactive products to prevent them from flowing into the environment. Cooling the core trap requires 1,400 tons of boric acid water. In consideration of the overhaul needs of the nuclear power plant, during normal operation of the unit, the reactor internals inspection well and the fuel pool on both sides of the reactor shaft each hold 700 tons of boric acid water. Hydraulic gates are used during normal operation of the unit; the reactor shaft is filled with water to the maximum allowable level. At this time, since the leakage monitoring pipeline between the hydraulic gates has not been designed with plugging measures, pouring boric acid water into the leakage monitoring pipeline in the primary circuit will cause false alarms of the monitoring instruments. At the same time, the boric acid water in the leakage monitoring pipeline will affect the maintenance of downstream pipelines and valves. Therefore, considering various factors and combining with the actual situation on site, a kind of nozzle plug and its special tool for disassembly and assembly of reactor hydraulic gate leakage monitoring was developed.
发明内容Contents of the invention
本发明的目的是，针对现有技术不足，提供一种实现反应堆竖井升水位期间泄漏监测管道的封堵，防止引起监测仪表误报警，同时为下游管道和阀门检修创造条件的反应堆液力闸门泄漏监测管口堵头及其拆装专用工具。The object of the present invention is to address the deficiencies in the prior art and provide a reactor hydraulic gate leakage that realizes the plugging of the leakage monitoring pipeline during the rise of the reactor shaft water level, prevents false alarms from monitoring instruments, and creates conditions for the maintenance of downstream pipelines and valves. Monitoring nozzle plugs and special tools for disassembly and assembly.
本发明的技术方案是：Technical scheme of the present invention is:
一种反应堆液力闸门泄漏监测管口堵头及其拆装专用工具，包括泄漏监测管口堵头和拆装专用工具；其中所述泄漏监测管口堵头包括上部压紧构件、下部压紧构件、密封胶条及压紧螺母，其中所述上部压紧构件通过压紧螺母固定于下部压紧构件上，所述下部压紧构件与上部压紧构件之间设有密封胶条；所述拆装专用工具包括堵头密封与解密封扳手和堵头拆装扳手。A leak monitoring nozzle plug of a reactor hydraulic gate and a special tool for its disassembly and assembly, including a leakage monitoring nozzle plug and a special tool for disassembly; wherein the leakage monitoring nozzle plug includes an upper pressing member, a lower pressing Components, sealing strips and compression nuts, wherein the upper compression component is fixed on the lower compression component through compression nuts, and a sealing strip is provided between the lower compression component and the upper compression component; Special tools for disassembly and assembly include plug sealing and unsealing wrench and plug disassembly wrench.
所述上部压紧构件中间设有通孔，通孔两侧均布两个定位销孔，上部压紧构件边沿设有上凸台，下部设有下凹台。A through hole is arranged in the middle of the upper pressing member, two positioning pin holes are evenly distributed on both sides of the through hole, an upper convex platform is arranged on the edge of the upper pressing member, and a lower concave platform is arranged on the lower part.
所述下部压紧构件包括堵头密封螺纹段、堵头拆装螺纹段、下底板及上凸台，其中所述上凸台设于下底板上方，所述上凸台上表面中心位置设有立柱凸起，立柱凸起上设有有堵头密封螺纹段，所述堵头密封螺纹段上端设有直径小于堵头密封螺纹段的堵头拆装螺纹段。The lower pressing member includes a plug sealing thread section, a plug dismounting thread section, a lower bottom plate and an upper boss, wherein the upper boss is arranged above the lower bottom plate, and the center of the upper surface of the upper boss is provided with The post protrudes, and the post protrusion is provided with a plug sealing thread section, and the upper end of the plug sealing thread section is provided with a plug detachable thread section with a diameter smaller than the plug sealing thread section.
所述堵头密封与解密封扳手包括堵头外层扳手、内层扳手、外层扳手手柄、定位销、内层扳手手柄及内六方套筒头，其中所述外层扳手套于内层扳手外侧，内层扳手上下端分别伸出，其上端设有内层扳手手柄，下端设有及内六方套筒头，外层扳手下端设有定位销，外层扳手上设有外层扳手手柄。The plug sealing and unsealing wrench includes a plug outer wrench, an inner wrench, an outer wrench handle, a positioning pin, an inner wrench handle and an inner hexagonal socket head, wherein the outer wrench fits the inner wrench On the outside, the upper and lower ends of the inner wrench protrude respectively, the upper end is provided with an inner wrench handle, the lower end is provided with an inner hexagonal socket head, the lower end of the outer wrench is provided with a positioning pin, and the outer wrench is provided with an outer wrench handle.
所述堵头拆装扳手上端设有堵头拆装扳手手柄，其下端设有内螺纹头。The upper end of the plug dismounting wrench is provided with a plug dismounting wrench handle, and its lower end is provided with an internal thread head.
本发明的有益效果是：The beneficial effects of the present invention are:
1.核电站大修期间，在反应堆竖井升水位前利用专用工具安装泄漏监测管口堵头并密封；1. During the overhaul of the nuclear power plant, use special tools to install and seal the leakage monitoring nozzle plug before the reactor shaft rises to the water level;
2.升水位期间堵头密封效果显著，反应堆竖井降水位后使用专用工具解除堵头密封并拆除，“长杆”设计的专用工具可保证检修人员处于一个安全的工作平面完成该项工作，大大降低该项工作的工业安全和辐射安全风险；2. The sealing effect of the plug is remarkable during the rising of the water level. After the reactor shaft lowers the water level, special tools are used to remove the sealing of the plug. Reduce the industrial safety and radiation safety risks of the work;
3.，实现反应堆竖井升水位期间泄漏监测管道的封堵，防止引起监测仪表误报警，同时为下游管道和阀门检修创造条件。3. Realize the plugging of the leakage monitoring pipeline during the rise of the water level in the reactor shaft, prevent false alarms from the monitoring instruments, and create conditions for the maintenance of downstream pipelines and valves.
附图说明Description of drawings
图1是泄漏监测管口堵头示意图；Fig. 1 is a schematic diagram of a leak monitoring nozzle plug;
图2是上部压紧构件示意图；Fig. 2 is a schematic diagram of the upper pressing member;
图3是下部压紧构件示意图；Fig. 3 is a schematic diagram of the lower pressing member;
图4是堵头密封与解密封扳手示意图；Fig. 4 is a schematic diagram of a plug sealing and unsealing wrench;
图5是堵头拆装扳手示意图。Fig. 5 is a schematic diagram of a plug dismounting wrench.
具体实施方式Detailed ways
下面结合附图本发明进行进一步的介绍：Below in conjunction with accompanying drawing the present invention carries out further introduction:
一种反应堆液力闸门泄漏监测管口堵头及其拆装专用工具，包括泄漏监测管口堵头和拆装专用工具；其中所述泄漏监测管口堵头包括上部压紧构件1、下部压紧构件2、密封胶条3及压紧螺母4，其中所述上部压紧构件1通过压紧螺母4固定于下部压紧构件2上，所述下部压紧构件2与上部压紧构件1之间设有密封胶条3；所述拆装专用工具包括堵头密封与解密封扳手和堵头拆装扳手。A reactor hydraulic gate leakage monitoring nozzle plug and its special tool for disassembly and assembly, including a leakage monitoring nozzle plug and a special tool for disassembly; wherein the leakage monitoring nozzle plug includes an upper pressing member 1, a lower pressing member Compression member 2, sealing rubber strip 3 and compression nut 4, wherein the upper compression member 1 is fixed on the lower compression member 2 through the compression nut 4, the connection between the lower compression member 2 and the upper compression member 1 There is a sealing strip 3 between them; the special tool for disassembly includes a plug sealing and unsealing wrench and a plug disassembly wrench.
所述上部压紧构件1中间设有通孔，通孔两侧均布两个定位销孔5，上部压紧构件1边沿设有上凸台6，下部设有下凹台7。A through hole is arranged in the middle of the upper pressing member 1, two positioning pin holes 5 are evenly distributed on both sides of the through hole, an upper convex platform 6 is arranged on the edge of the upper pressing member 1, and a lower concave platform 7 is arranged on the lower part.
所述下部压紧构件2包括堵头密封螺纹段8、堵头拆装螺纹段9、下底板10及上凸台11，其中所述上凸台11设于下底板10上方，所述上凸台11上表面中心位置设有立柱凸起，立柱凸起上设有有堵头密封螺纹段8，所述堵头密封螺纹段8上端设有直径小于堵头密封螺纹段8的堵头拆装螺纹段9。The lower pressing member 2 includes a plug sealing thread section 8, a plug dismounting thread section 9, a lower bottom plate 10 and an upper boss 11, wherein the upper boss 11 is arranged above the lower bottom plate 10, and the upper convex The center position of the upper surface of platform 11 is provided with a column protrusion, and the column protrusion is provided with a plug sealing thread section 8, and the upper end of the plug sealing thread section 8 is provided with a plug whose diameter is smaller than that of the plug sealing thread section 8. Thread segment 9.
所述堵头密封与解密封扳手包括堵头外层扳手12、内层扳手13、外层扳手手柄14、定位销15、内层扳手手柄16及内六方套筒头17，其中所述外层扳手12套于内层扳手13外侧，内层扳手13上下端分别伸出，其上端设有内层扳手手柄16，下端设有及内六方套筒头17，外层扳手12下端设有定位销15，外层扳手12上设有外层扳手手柄14。The plug sealing and unsealing wrench includes plug outer layer wrench 12, inner layer wrench 13, outer layer wrench handle 14, positioning pin 15, inner layer wrench handle 16 and inner hexagonal socket head 17, wherein the outer layer The wrench 12 is set on the outside of the inner wrench 13, the upper and lower ends of the inner wrench 13 protrude respectively, the upper end is provided with an inner wrench handle 16, the lower end is provided with an inner hexagonal socket head 17, and the lower end of the outer wrench 12 is provided with a positioning pin 15. An outer wrench handle 14 is provided on the outer wrench 12 .
所述堵头拆装扳手上端设有堵头拆装扳手手柄18，其下端设有内螺纹头19。The upper end of the plug dismounting wrench is provided with a plug dismounting wrench handle 18, and its lower end is provided with an internal thread head 19.
实施例Example
泄漏监测管口堵头由上部压紧构件、下部压紧构件、密封垫圈和压紧螺母四个部分组成。堵头密封原理：堵头初始状态下，压紧螺母未压紧上部压紧构件，密封胶条处于自然松弛状态。当用堵头密封与解密封扳手拧紧压紧螺母时，上部压紧构件下行，下部压紧构件上行，在上下压紧构件共同挤压作用下密封胶条被压缩胀开紧贴在管道内壁和下部压紧构件凸台侧壁上，从而实现密封。The leakage monitoring nozzle plug is composed of four parts: an upper compression member, a lower compression member, a sealing washer and a compression nut. Plug sealing principle: In the initial state of the plug, the compression nut does not compress the upper compression member, and the sealing rubber strip is in a naturally loose state. When the compression nut is tightened with a plug sealing and unsealing wrench, the upper compression member goes down, and the lower compression member goes up. Under the joint extrusion of the upper and lower compression members, the sealing rubber strip is compressed and expands to cling to the inner wall of the pipe and The lower part presses the member on the side wall of the boss, so as to realize the sealing.
上部压紧构件上凸台起定位作用，可使堵头定位在需封堵的管道管口上。定位销孔共有两个，用于定位并固定堵头密封与解密封扳手外层扳手。下凹台与下部压紧构件上凸台相配合，用于安放密封胶条并防止密封胶条在径向上窜动，且下部压紧构件上凸台立面为密封面。The boss on the upper pressing member acts as a positioning function, so that the plug can be positioned on the nozzle of the pipeline to be blocked. There are two positioning pin holes, which are used to locate and fix the outer layer wrench of the plug sealing and unsealing wrench. The lower concave platform cooperates with the upper convex platform of the lower pressing member, and is used to place the sealing rubber strip and prevent the sealing rubber strip from moving in the radial direction, and the elevation of the upper convex platform of the lower pressing member is a sealing surface.
下部压紧构件堵头密封螺纹段与压紧螺母配合，提供对密封胶条的压紧作用力，实现堵头的密封与解密封。堵头拆装螺纹段与堵头拆装扳手下部内螺纹头配合，可用于在管道管口中安装和拆出堵头。The sealing threaded section of the plug of the lower compression member cooperates with the compression nut to provide a compression force on the sealing rubber strip to realize the sealing and unsealing of the plug. The threaded section for removing and installing the plug cooperates with the inner threaded head of the lower part of the plug removing and installing wrench, and can be used for installing and removing the plug in the pipe nozzle.
堵头密封与解密封扳手由外层扳手和内层扳手组成。外层扳手主要作用是固定堵头，防止密封(或解密封)堵头过程中堵头自身产生转动。内层扳手主要作用是紧固(或拧松)压紧螺母，实现密封胶条胀开(或回弹)。内外层扳手均设计有手柄，外层扳手下部有两个定位销与堵头上部压紧构件定位销孔配合，可固定堵头。内层扳手底端有内六方套筒头，用于紧固(或拧松)压紧螺母。The plug sealing and unsealing wrench consists of an outer wrench and an inner wrench. The main function of the outer layer wrench is to fix the plug and prevent the plug itself from rotating during the process of sealing (or unsealing) the plug. The main function of the inner wrench is to tighten (or loosen) the compression nut to realize the expansion (or rebound) of the sealing strip. Both the inner and outer layer wrenches are designed with handles, and there are two positioning pins on the lower part of the outer layer wrench to cooperate with the positioning pin holes of the pressing member on the upper part of the plug to fix the plug. There is a hexagon socket head at the bottom of the inner wrench, which is used to tighten (or loosen) the compression nut.
2.泄漏监测管口堵头及其拆装专用工具的应用2. Application of leakage monitoring nozzle plugs and special tools for disassembly and assembly
机组大修期间，反应堆竖井升水位前安装液力闸门间泄漏监测管口堵头。安装方法：(1)检查堵头上密封胶条的可用性(如胶条不可用，可拆除压紧螺母，取出上部压紧构件，更换密封胶条后回装上部压紧构件及压紧螺母)；(2)确认压紧螺母未拧紧，密封胶条处于松弛状态；(3)在堵头密封螺纹和拆装螺纹上涂抹薄薄一层润滑脂，将拆装扳手与堵头拆装螺纹段连接，提起堵头平稳放置到泄漏监测管口上；(4)拧下拆装扳手，将密封与解密封扳手外层扳手两个定位销插入堵头定位销孔，一手把住外层扳手手柄防止堵头转动，一手顺时针转动内层扳手拧紧压紧螺母，使密封胶条充分胀开实现密封，拆除密封与解密封扳手，完成堵头安装。During unit overhaul, plugs for leakage monitoring nozzles between hydraulic gates are installed before the reactor shaft rises to the water level. Installation method: (1) Check the availability of the sealing strip on the plug (if the strip is not available, remove the compression nut, take out the upper compression member, replace the sealing strip and reinstall the upper compression member and compression nut) ;(2) Confirm that the compression nut is not tightened and the sealing strip is in a loose state; (3) Apply a thin layer of grease on the sealing thread of the plug and the disassembly thread, and connect the disassembly wrench with the disassembly thread section of the plug (4) Unscrew the disassembly wrench, insert the two positioning pins of the outer wrench of the sealing and unsealing wrench into the positioning pin hole of the plug, and hold the handle of the outer wrench with one hand to prevent leakage. Rotate the plug, turn the inner wrench clockwise with one hand to tighten the compression nut, so that the sealing strip is fully expanded to achieve sealing, remove the sealing and unsealing wrench, and complete the installation of the plug.
在反应堆竖井降水位后，按照上述步骤相反的顺序完成堵头拆卸。该堵头自设计制作以来，在历次大修中成功应用，有效地封堵泄漏监测管口，防止反应堆竖井升水位期间一回路硼酸水进入泄漏监测管道。并且堵头拆装专用工具设计巧妙，保证检修人员处于较安全的工作平面开展检修工作，保证人员的工业安全和辐射安全。After the reactor shaft lowers the water level, the plug removal is completed in the reverse order of the above steps. Since the design and production of the plug, it has been successfully applied in previous overhauls, effectively sealing the leakage monitoring nozzle, and preventing the boric acid water of the primary circuit from entering the leakage monitoring pipeline during the rise of the reactor shaft water level. In addition, the special tools for plug disassembly and assembly are ingeniously designed to ensure that the maintenance personnel are on a safer working plane to carry out maintenance work, ensuring the industrial safety and radiation safety of personnel.
反应堆液力闸门泄漏监测管口堵头及其拆装专用工具已在田湾核电站多次大修升水位期间成功应用，实现了泄漏监测管口有效封堵，防止监测仪表误报警，并为下游管道和阀门检修创造条件。该项目可以在同类型机组相关工作中推广应用。Reactor hydraulic gate leakage monitoring nozzle plugs and special tools for disassembly and assembly have been successfully used in Tianwan Nuclear Power Station during several overhauls to raise the water level, realizing effective sealing of leakage monitoring nozzles, preventing false alarms from monitoring instruments, and providing protection for downstream pipelines. And create conditions for valve maintenance. This project can be popularized and applied in the related work of the same type of unit.
本项目设计制作的反应堆液力闸门泄漏监测管口堵头及其拆装专用工具可以推广到电站其他类似设备在特殊工况下的封堵。The reactor hydraulic gate leakage monitoring nozzle plug and the special tool for disassembly and assembly designed and manufactured in this project can be extended to the plugging of other similar equipment in the power station under special working conditions.
本项目对于同行业其他类似设备在特殊工况下的封堵也具有良好的借鉴意义。This project also has good reference significance for the plugging of other similar equipment in the same industry under special working conditions.
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