CN108871689A - A kind of high sensitivity vacuum leak detector - Google Patents
A kind of high sensitivity vacuum leak detector Download PDFInfo
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- CN108871689A CN108871689A CN201810738135.6A CN201810738135A CN108871689A CN 108871689 A CN108871689 A CN 108871689A CN 201810738135 A CN201810738135 A CN 201810738135A CN 108871689 A CN108871689 A CN 108871689A
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- 230000035945 sensitivity Effects 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 238000005086 pumping Methods 0.000 claims abstract description 8
- 239000011521 glass Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 28
- 230000001105 regulatory effect Effects 0.000 abstract description 11
- 239000005357 flat glass Substances 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000007689 inspection Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 238000003904 radioactive pollution Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
本发明是一种高灵敏度真空检漏装置，包括真空罩组件、真空抽气系统和压力精确控制组件，其中：所述真空罩组件包括有真空罩体和密封条，沿所述真空罩体的开口端边缘环向固接有密封槽，所述密封条设置在密封槽内，所述密封条外侧设有观察窗玻璃；所述真空抽气系统包括有真空泵，所述真空泵通过相应的气管及进气阀连通真空罩体，用于抽真空；所述压力精确控制组件包括有调压阀和高精度负压表，所述调压阀和高精度负压表设置于真空罩体上，分别用于调节和观测真空罩体内的压力值。本发明装置降低了设备重量，提高检漏的灵敏度、以及装置的可靠性和可操作性，降低检验人员劳动强度。
The present invention is a high-sensitivity vacuum leak detection device, which includes a vacuum cover assembly, a vacuum pumping system and an accurate pressure control assembly, wherein: the vacuum cover assembly includes a vacuum cover body and a sealing strip, along the vacuum cover body The edge of the opening end is circumferentially fixed with a sealing groove, the sealing strip is arranged in the sealing groove, and an observation window glass is arranged on the outside of the sealing strip; the vacuum pumping system includes a vacuum pump, and the vacuum pump passes through the corresponding air pipe and The intake valve is connected to the vacuum cover for vacuuming; the precise pressure control component includes a pressure regulating valve and a high-precision negative pressure gauge, and the pressure regulating valve and the high-precision negative pressure gauge are arranged on the vacuum cover, respectively Used to adjust and observe the pressure value in the vacuum enclosure. The device of the invention reduces the weight of equipment, improves the sensitivity of leak detection, the reliability and operability of the device, and reduces the labor intensity of inspectors.
Description
技术领域technical field
本发明属于核电、航空、航天、汽车、高铁、常规电站等无损检测技术领域，具体涉及一种高灵敏度真空检漏装置。The invention belongs to the technical fields of non-destructive testing such as nuclear power, aviation, aerospace, automobile, high-speed rail, and conventional power stations, and in particular relates to a high-sensitivity vacuum leak detection device.
背景技术Background technique
传统无损检测真空检漏装置产品材料使用的是铸铝，设备自重过重；放射性污染环境下使用携带不便，非常笨重，也不便于去污；观察窗狭窄，采光不足，在现场使用还需单独配照明；密封条是几段拼凑起来，有接头，容易漏气，密封性不好，保压控制不稳定，检漏过程中干扰信号较多，不便于区分缺陷信号，灵敏度不高，现场操作不便，容易漏检；且外接抽气管线安装拆卸困难，不便于更换，严重影响无损检验人员现场使用，降低检测速度，影响检测质量，因此有必要设计一种新型便携式重量轻、检漏灵敏度高的抽真空检漏装置。The product material of the traditional non-destructive testing vacuum leak detection device is cast aluminum, and the weight of the equipment is too heavy; it is inconvenient to carry in a radioactive pollution environment, it is very heavy, and it is not easy to decontaminate; the observation window is narrow and the lighting is insufficient, and it needs to be used separately on site. Equipped with lighting; the sealing strip is made up of several sections, with joints, easy to leak, poor sealing, unstable pressure control, many interference signals during leak detection, it is not easy to distinguish defect signals, low sensitivity, and on-site operation It is inconvenient and easy to miss inspection; and the installation and disassembly of the external extraction pipeline is difficult, and it is not easy to replace, which seriously affects the on-site use of non-destructive inspection personnel, reduces the detection speed, and affects the quality of detection. Therefore, it is necessary to design a new type of portable leak detection with light weight and high sensitivity. vacuum leak detection device.
本发明提出一种真空检漏装置，克服上述现有产品检测对象单一的缺点，并且可按被检对象尺寸量身订作，制作成适应各种被检对象的异型罩，如：检查L型、凸型、三角形等各种异型焊缝和平板结构。The present invention proposes a vacuum leak detection device, which overcomes the shortcomings of the above-mentioned existing product detection object, and can be tailored according to the size of the object to be inspected, and made into a special-shaped cover suitable for various objects to be inspected, such as: checking L-shaped , convex, triangular and other special-shaped welds and flat structures.
发明内容Contents of the invention
本发明的目的在于克服现有技术存在的问题，提供一种高灵敏度真空检漏装置，降低设备重量，提高检漏的灵敏度、设备的可靠性和可操作性，降低检验人员劳动强度。The object of the present invention is to overcome the problems existing in the prior art, provide a high-sensitivity vacuum leak detection device, reduce the weight of the equipment, improve the sensitivity of leak detection, the reliability and operability of the equipment, and reduce the labor intensity of inspectors.
为实现上述技术目的，达到上述技术效果，本发明通过以下技术方案实现：In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the present invention is realized through the following technical solutions:
一种高灵敏度真空检漏装置，包括真空罩组件、真空抽气系统和压力精确控制组件，其中：A high-sensitivity vacuum leak detection device, including a vacuum cover assembly, a vacuum pumping system and an accurate pressure control assembly, wherein:
所述真空罩组件包括有真空罩体和密封条，沿所述真空罩体的开口端边缘环向固接有密封槽，所述密封条设置在密封槽内，所述密封条外侧设有观察窗玻璃；The vacuum cover assembly includes a vacuum cover body and a sealing strip, a sealing groove is affixed circumferentially along the edge of the opening end of the vacuum cover body, the sealing strip is arranged in the sealing groove, and an observation panel is provided outside the sealing strip window glass;
所述真空抽气系统包括有真空泵，所述真空泵通过相应的气管及进气阀连通真空罩体，用于抽真空；The vacuum pumping system includes a vacuum pump, and the vacuum pump communicates with the vacuum cover through a corresponding air pipe and an intake valve for vacuuming;
所述压力精确控制组件包括有调压阀和高精度负压表，所述调压阀和高精度负压表设置于真空罩体上，分别用于调节和观测真空罩体内的压力值。The precise pressure control assembly includes a pressure regulating valve and a high-precision negative pressure gauge. The pressure regulating valve and the high-precision negative pressure gauge are arranged on the vacuum housing and are used to adjust and observe the pressure value in the vacuum housing respectively.
进一步的，所述真空罩体为长方体不锈钢结构，并且该长方体不锈钢结构的四个转角通过全周氩弧焊焊接形成。Further, the vacuum cover is a rectangular parallelepiped stainless steel structure, and the four corners of the rectangular parallelepiped stainless steel structure are formed by full-circle argon arc welding.
进一步的，所述密封槽通过多间断点稳固焊的方式焊接在真空罩体上。Further, the sealing groove is welded to the vacuum cover by way of multi-discontinuity stable welding.
进一步的，所述观察窗玻璃采用防爆钢化白玻璃。Further, the observation window glass is made of explosion-proof tempered white glass.
进一步的，所述调压阀处设有消音器。Further, a muffler is provided at the pressure regulating valve.
进一步的，所述真空罩体侧面设有操作把手。Further, an operating handle is provided on the side of the vacuum cover.
进一步的，所述观察窗玻璃的外侧设有辅助光源。Further, an auxiliary light source is provided on the outside of the observation window glass.
进一步的，所述辅助光源滑动地设置于一导轨上，所述导轨设置于真空罩体下方。Further, the auxiliary light source is slidably arranged on a guide rail, and the guide rail is arranged under the vacuum cover.
本发明的有益效果是:The beneficial effects of the present invention are:
1、本发明装置通过对压力调节阀精准控制，可达到ASME、RCC-M和NB/T47013等标准规范所要求的各项检漏保压时间和压力要求。1. Through the precise control of the pressure regulating valve, the device of the present invention can meet the various leak detection and pressure holding time and pressure requirements required by ASME, RCC-M and NB/T47013 and other standards.
2、重量轻，可在各种复杂环境下使用，尤其是放射性污染环境下，避免了放射性污染物被放气阀被吸起悬浮在空中，人员吸入的内污染风险，可用水洗，去污效果好。2. It is light in weight and can be used in various complex environments, especially in radioactive pollution environments. It avoids the risk of internal pollution caused by radioactive pollutants being sucked up by the vent valve and suspended in the air. It can be washed with water and has a good decontamination effect. it is good.
3、结构简单，防腐蚀、可靠性和可操作性高，易于维护和携带。3. Simple structure, high corrosion resistance, high reliability and operability, easy to maintain and carry.
4、容易更换真空罩体相关阀门、压力表、接头、气管、玻璃等各种配件，可扩展性好。4. It is easy to replace various accessories such as valves, pressure gauges, joints, air pipes, glass, etc. related to the vacuum cover, and has good scalability.
5、密封条放置在密封槽内，不会因抽负压而脱落造成真空下降。5. The sealing strip is placed in the sealing groove, so it will not fall off due to negative pressure and cause vacuum drop.
附图说明Description of drawings
图1为本发明的整体结构示意图；Fig. 1 is the overall structure schematic diagram of the present invention;
图2为本发明的真空罩体结构示意图；Fig. 2 is a schematic view of the structure of the vacuum enclosure of the present invention;
图3为本发明进行真空容器检漏示意图；Fig. 3 is the schematic diagram that the present invention carries out vacuum vessel leak detection;
图4为本发明进行试板或焊缝检漏示意。Fig. 4 is the schematic diagram of the present invention to carry out test plate or weld seam leak detection.
图中标号说明：1、真空罩体，2、密封条，3、密封槽，4、观察窗玻璃，5、真空泵，6、气管，7、进气阀，8、调压阀，9、高精度负压表，10、消音器，11、操作把手，12、辅助光源，13、导轨，14、显示液，15、真空容器被检件，16、试板或焊缝被检件。Explanation of symbols in the figure: 1. Vacuum cover body, 2. Sealing strip, 3. Sealing groove, 4. Observation window glass, 5. Vacuum pump, 6. Trachea, 7. Inlet valve, 8. Pressure regulating valve, 9. High Precision negative pressure gauge, 10. Muffler, 11. Operating handle, 12. Auxiliary light source, 13. Guide rail, 14. Display liquid, 15. Vacuum container to be inspected, 16. Test plate or weld to be inspected.
具体实施方式Detailed ways
下面将参考附图并结合实施例，来详细说明本发明。The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
参照图1和图2所示，一种高灵敏度真空检漏装置，包括真空罩组件、真空抽气系统和压力精确控制组件，其中：Referring to Figures 1 and 2, a high-sensitivity vacuum leak detection device includes a vacuum cover assembly, a vacuum pumping system and an accurate pressure control assembly, wherein:
所述真空罩组件包括有真空罩体1和密封条2，沿所述真空罩体1的开口端边缘环向固接有密封槽3，所述密封条2设置在密封槽3内，检漏过程中不会脱落，从而达到检漏装置设备密封性要求，所述密封条2外侧设有观察窗玻璃4；The vacuum cover assembly includes a vacuum cover 1 and a sealing strip 2, a sealing groove 3 is affixed circumferentially along the edge of the opening end of the vacuum cover 1, and the sealing strip 2 is arranged in the sealing groove 3 for leak detection. It will not fall off during the process, so as to meet the sealing requirements of the leak detection device equipment, and the outer side of the sealing strip 2 is provided with an observation window glass 4;
所述真空抽气系统包括有真空泵5，所述真空泵5通过相应的气管6及进气阀7连通真空罩体1，用于抽真空；The vacuum pumping system includes a vacuum pump 5, and the vacuum pump 5 communicates with the vacuum cover 1 through the corresponding air pipe 6 and the intake valve 7 for vacuuming;
所述压力精确控制组件包括有调压阀8和高精度负压表9，所述调压阀8和高精度负压表9设置于真空罩体1上，分别用于调节和观测真空罩体1内的压力值。The precise pressure control assembly includes a pressure regulating valve 8 and a high-precision negative pressure gauge 9, and the pressure regulating valve 8 and the high-precision negative pressure gauge 9 are arranged on the vacuum cover 1 for adjusting and observing the vacuum cover respectively 1 pressure value.
所述真空罩体1为长方体不锈钢结构，并且该长方体不锈钢结构的四个转角通过全周氩弧焊焊接形成。The vacuum cover 1 is a rectangular parallelepiped stainless steel structure, and the four corners of the rectangular parallelepiped stainless steel structure are welded by argon arc welding all around.
所述密封槽3通过多间断点稳固焊的方式焊接在真空罩体1上。The sealing groove 3 is welded to the vacuum cover body 1 by way of multi-discontinuity solid welding.
所述观察窗玻璃4采用防爆钢化白玻璃，耐压强度和透视采光效果良好。The observation window glass 4 adopts explosion-proof tempered white glass, which has good compressive strength and perspective lighting effect.
所述调压阀8处设有消音器10。The pressure regulating valve 8 is provided with a muffler 10 .
所述真空罩体1侧面设有操作把手11。An operating handle 11 is provided on the side of the vacuum cover 1 .
所述观察窗玻璃4的外侧设有辅助光源12。An auxiliary light source 12 is provided on the outer side of the observation window glass 4 .
所述辅助光源12滑动地设置于一导轨13上，所述导轨13设置于真空罩体1下方。The auxiliary light source 12 is slidably arranged on a guide rail 13 , and the guide rail 13 is arranged under the vacuum cover 1 .
本发明原理Principle of the invention
首先，抽真空检漏的原理是：当漏孔两侧存在压差时，示漏气体就通过漏孔从高压侧向低压侧流动，如果在低压侧有显示液体（如水、氟油、酒精等），漏孔处将有可能吹起一个个气泡，显示出漏率大小及漏孔的位置，从而发现漏孔。First of all, the principle of vacuum leak detection is: when there is a pressure difference on both sides of the leak hole, the leaking gas will flow from the high pressure side to the low pressure side through the leak hole. etc.), it is possible to blow up bubbles at the leak hole, showing the size of the leak rate and the position of the leak hole, so as to find the leak hole.
如图3和图4所示，为采用本发明真空检漏装置，对真空容器、以及对试板或焊缝进行检漏，观察显示液14中的气泡规律。As shown in Fig. 3 and Fig. 4, in order to adopt the vacuum leak detection device of the present invention, carry out leak detection to the vacuum container, and to the test plate or the welding seam, observe and display the bubble pattern in the liquid 14.
具体的检漏过程如下：The specific leak detection process is as follows:
1、测量被检工件尺寸，表面光照度：(>1000Lx)；表面温度：须在4～520C范围内；1. Measure the size of the inspected workpiece, surface illuminance: (>1000Lx); surface temperature: must be within the range of 4 ~ 520C;
2、清洗标准试片和被检件表面；在标准试片(0.05mm孔)上均匀涂上发泡剂；扣上真空罩体1，使之贴合在标准试片表面；调节调压阀8使真空度达到标准要求压力-0.02MPa后，停留10秒钟，并观察，如有连续气泡出现，则检测灵敏度达到要求，可以进行下一步检测，否则继续抽真空，当真空抽到-0.05MPa，停留30秒钟并观察，是否有连续气泡出现，要在标准试片有连续气泡出现可进行下一步检测；2. Clean the surface of the standard test piece and the tested piece; evenly coat the foaming agent on the standard test piece (0.05mm hole); fasten the vacuum cover 1 to fit it on the surface of the standard test piece; adjust the pressure regulating valve 8 Make the vacuum reach the standard pressure -0.02MPa, stay for 10 seconds, and observe, if there are continuous bubbles, the detection sensitivity meets the requirements, and the next step of detection can be carried out, otherwise continue to vacuumize, when the vacuum reaches -0.05 MPa, stay for 30 seconds and observe, whether there are continuous air bubbles, if there are continuous air bubbles in the standard test piece, the next step of detection can be carried out;
3、在被检件表面均匀涂上发泡剂；扣上真空罩体1，使之贴合被检件表面；真空度达到-0.02MPa后，停留10秒钟，并观察，继续抽真空，当真空抽到-0.05MPa，停留30秒钟并观察，每一相邻区域的试验，真空罩体1的放置应至少保证有50mm的重叠覆盖区域，避免漏检；3. Apply foaming agent evenly on the surface of the inspected piece; buckle the vacuum cover 1 to make it fit the surface of the inspected piece; after the vacuum degree reaches -0.02MPa, stay for 10 seconds and observe, continue to vacuum, When the vacuum reaches -0.05MPa, stay for 30 seconds and observe. For the test of each adjacent area, the placement of the vacuum cover 1 should ensure at least a 50mm overlapping coverage area to avoid missing inspections;
4、被检件表面上有连续的气泡出现，就表示有穿透性的泄漏，记录泄漏点的位置；4. If there are continuous air bubbles on the surface of the inspected part, it means that there is a penetrating leak, and the position of the leak point is recorded;
5、关闭真空泵，打开放气阀，取下真空罩；5. Turn off the vacuum pump, open the vent valve, and remove the vacuum cover;
6、按第2条的过程能进行灵敏度复验；6. Sensitivity re-inspection can be carried out according to the process of Article 2;
7、后处理：用水把检验区冲洗干净或擦拭干净。7. Post-processing: Rinse or wipe the inspection area with water.
在具体应用时，本发明装置可配置在带摄像头遥控自动化小车上实现远程检查，可在放射性环境下和人无法达到的环境实现远程检漏。In a specific application, the device of the present invention can be configured on a remote control automatic car with a camera to realize remote inspection, and can realize remote leak detection in a radioactive environment and an environment that cannot be reached by humans.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810738135.6A CN108871689A (en) | 2018-07-06 | 2018-07-06 | A kind of high sensitivity vacuum leak detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810738135.6A CN108871689A (en) | 2018-07-06 | 2018-07-06 | A kind of high sensitivity vacuum leak detector |
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| CN109883618A (en) * | 2019-04-16 | 2019-06-14 | 中国五冶集团有限公司 | Groove tank bottom plate leak test vacuum box structure and test method |
| CN111272329A (en) * | 2020-03-20 | 2020-06-12 | 杭州科技职业技术学院 | Product suction detection structure for automatic detection line of dust collector |
| CN113739999A (en) * | 2020-05-29 | 2021-12-03 | 中核武汉核电运行技术股份有限公司 | Vacuum leakage inspection device based on differential pressure method |
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