CN103017990A - Multipath freezing leakage detection equipment - Google Patents
Multipath freezing leakage detection equipment Download PDFInfo
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- CN103017990A CN103017990A CN201210559758XA CN201210559758A CN103017990A CN 103017990 A CN103017990 A CN 103017990A CN 201210559758X A CN201210559758X A CN 201210559758XA CN 201210559758 A CN201210559758 A CN 201210559758A CN 103017990 A CN103017990 A CN 103017990A
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- freezing
- leakage detection
- communicated
- multipath
- cold trap
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Abstract
The invention discloses multipath freezing leakage detection equipment. The multipath freezing leakage detection equipment comprises multiple paths of freezing leakage detection devices. Each path of freezing leakage detection device comprises a vacuum gauge which is communicated with one end of a U-shaped pipe, wherein the other end of the U-shaped pipe is communicated with one end of a valve, the other end of the valve is communicated with a detected container through a guide pipe, a plurality of U-shaped pipes are placed inside a cold trap, a lifting device is connected with the lower end of the cold trap, and liquid nitrogen is contained in the cold trap. The multipath freezing leakage detection equipment condenses water vapor in the guide pipe by processing of the cold trap, excludes an influence of confined space interior gas self-bleeding volume on leakage rate measuring, simultaneously achieves measuring of leakage rates of a plurality of confined spaces by placing a plurality of U-shaped pipes in the cold trap containing the liquid nitrogen, saves the liquid nitrogen, and improves work efficiency.
Description
Technical field
The invention belongs to leak test plant, be specially a kind of freezing leak test plant of multichannel that simultaneously slip of a plurality of confined spaces is detected.
Background technology
Leak detection technology is mainly used in the sealing of the containers such as vacuum tank, pressure vessel, liquid storage container is surveyed, and common method mainly contains mass spectrum leak detection method, vacuum meter leak detecting, air-sensitive leak detecting, halogen leak detection etc.And also do not have general effective ways for the ultralow Leak Detection of the confined space that is consisted of by a plurality of potential leakage points.
Summary of the invention
For addressing the above problem, the invention provides the freezing leak test plant of a kind of multichannel.
Technical scheme of the present invention is: the freezing leak test plant of a kind of multichannel, comprise the freezing leakage detection apparatus of multichannel, the freezing leakage detection apparatus in every road comprises that an end of vacuum meter and U-shaped pipe is communicated with, and an end of the other end of U-shaped pipe and valve is communicated with, and the other end of valve is communicated with by conduit and tested container.
A plurality of U-shaped pipes are placed on a cold-trap inside, are connected with jacking gear in the lower end of cold-trap, and liquid nitrogen is housed in cold-trap.
The number of described freezing leakage detection apparatus is ten four the tunnel.
Described conduit adopts copper tube.
The freezing leak test plant of multichannel provided by the present invention is processed by cold-trap the steam in the conduit is carried out condensation, gets rid of the impact that confined space inside self discharge quantity is measured slip; A plurality of U-shaped pipes are concentrated be positioned in the cold-trap that liquid nitrogen is housed, realized simultaneously liquid nitrogen has been saved in the measurement of a plurality of confined space slips, improved work efficiency.
Description of drawings
Fig. 1 is the arrangenent diagram of the freezing leak test plant of multichannel of the present invention;
Fig. 2 is the structural representation of the freezing leakage detection apparatus in every road of the present invention.
Wherein:
1 vacuum meter, 2 U-shaped pipes
3 valves, 4 conduits
5 cold-traps, 6 jacking gears
7 liquid nitrogen, 8 tested containers.
Embodiment
Below, by reference to the accompanying drawings the concrete structure of the freezing leak test plant of multichannel of the present invention is described further:
As shown in Figure 1, 2, the freezing leak test plant of a kind of multichannel comprises the freezing leakage detection apparatus of multichannel, and the freezing leakage detection apparatus in every road comprises that an end of vacuum meter 1 and U-shaped pipe 2 is communicated with, one end of the other end of U-shaped pipe 2 and valve 3 is communicated with, and the other end of valve 3 is communicated with by conduit 4 and tested container 8.
A plurality of U-shaped pipes 2 are placed on cold-trap 5 inside, are connected with jacking gear 6 in the lower end of cold-trap 5, and liquid nitrogen 7 is housed in cold-trap 5.
The number of freezing leakage detection apparatus is ten four the tunnel in the present embodiment, and conduit 2 adopts copper tube.
Leak detection step of the present invention is as follows:
The force value that (ⅰ) tested container is evacuated to vacuum meter 1 is P
0The time, stop to find time;
(ⅱ) valve-off 3, and in the liquid nitrogen 7 that this moment, U-shaped pipe 2 was immersed in the cold-trap 5, the pressure of observing vacuum meter 1 changes, and records the pressure minimum P of freezing final vacuum meter 1
1, dose liquid nitrogen 7 in this process, in time for cold-trap 5, the liquid level of cold-trap 5 interior liquid nitrogen is remained unchanged;
(ⅲ) start jacking gear 6, drive cold-trap 5 and move down, make U-shaped pipe 2 break away from liquid nitrogen, after U-shaped pipe 2 returns to room temperature, open valve 3, tested container 8 is communicated with U-shaped pipe 2;
(ⅳ) after 1 hour, the operation of repeating step (ⅱ), (ⅲ) is finished for the second time and is measured, and obtains the pressure minimum P of freezing final vacuum meter 1
2, measured the interval 1 hour at every turn, carry out successively six times and measure, obtain six pressure value P
1, P
2, P
3, P
4, P
5, P
6
If ((P
2-P
1)+(P
3-P
2)+(P
4-P
3)+(P
5-P
4)+(P
6-P
5))/5＜0.09Pa, then the sealing of tested container is good.
Freezing measurement is the metering system that is treated to the basis with cold-trap.It is a kind of cooling device that cold-trap is processed, and the U-shaped pipe is placed in the refrigerant, and when gas during by the U-shaped pipe, the material that boiling point is high becomes liquid, and low-boiling material still exists with the form of gas.The freezing leak test plant of multichannel provided by the present invention is processed by cold-trap the steam in the conduit is carried out condensation, gets rid of the impact that confined space inside self discharge quantity is measured slip; A plurality of U-shaped pipes are concentrated be positioned in the cold-trap that liquid nitrogen is housed, realized simultaneously liquid nitrogen has been saved in the measurement of a plurality of confined space slips, improved work efficiency.
Claims (3)
1. freezing leak test plant of multichannel, comprise the freezing leakage detection apparatus of multichannel, the freezing leakage detection apparatus in every road comprises that an end of vacuum meter (1) and U-shaped pipe (2) is communicated with, one end of the other end of U-shaped pipe (2) and valve (3) is communicated with, the other end of valve (3) is communicated with by conduit (4) and tested container (8), a plurality of U-shaped pipes (2) are placed on a cold-trap (5) inside, are connected with jacking gear (6) in the lower end of cold-trap (5), and liquid nitrogen (7) is housed in cold-trap (5).
2. the freezing leak test plant of multichannel according to claim 1, it is characterized in that: the number of described freezing leakage detection apparatus is ten four the tunnel.
3. the freezing leak test plant of multichannel according to claim 1 is characterized in that: described conduit (4) employing copper tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210559758XA CN103017990A (en) | 2012-12-21 | 2012-12-21 | Multipath freezing leakage detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210559758XA CN103017990A (en) | 2012-12-21 | 2012-12-21 | Multipath freezing leakage detection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103017990A true CN103017990A (en) | 2013-04-03 |
Family
ID=47966849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210559758XA Pending CN103017990A (en) | 2012-12-21 | 2012-12-21 | Multipath freezing leakage detection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103017990A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024335A (en) * | 2019-12-30 | 2020-04-17 | 中核兰州铀浓缩有限公司 | Static boosting freezing measurement device and method for container vacuum test |
| CN115531907A (en) * | 2022-08-19 | 2022-12-30 | 安徽贝意克智能科技有限公司 | Down-loading type cold trap structure and sublimation instrument |
Citations (5)
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|---|---|---|---|---|
| US5235845A (en) * | 1990-02-06 | 1993-08-17 | Sumitomo Metal Mining Co., Ltd. | Method of detecting a pinhole at a welded portion of an article |
| WO1994004902A1 (en) * | 1992-08-25 | 1994-03-03 | Leybold Ag | Vaccum meter for integral tightness check by means of light gasses |
| CN101281178A (en) * | 2008-04-03 | 2008-10-08 | 南京大学 | Quantitative detecting method of trace amount phosphine gas and enriching apparatus thereof |
| CN201302508Y (en) * | 2008-12-03 | 2009-09-02 | 深圳市山伊克斯电池有限公司 | Battery cell leakage tester |
| CN102589936A (en) * | 2012-01-12 | 2012-07-18 | 中国科学院地理科学与资源研究所 | Device and method for synchronously collecting atmosphere CO2 and water vapor samples |
-
2012
- 2012-12-21 CN CN201210559758XA patent/CN103017990A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5235845A (en) * | 1990-02-06 | 1993-08-17 | Sumitomo Metal Mining Co., Ltd. | Method of detecting a pinhole at a welded portion of an article |
| WO1994004902A1 (en) * | 1992-08-25 | 1994-03-03 | Leybold Ag | Vaccum meter for integral tightness check by means of light gasses |
| CN101281178A (en) * | 2008-04-03 | 2008-10-08 | 南京大学 | Quantitative detecting method of trace amount phosphine gas and enriching apparatus thereof |
| CN201302508Y (en) * | 2008-12-03 | 2009-09-02 | 深圳市山伊克斯电池有限公司 | Battery cell leakage tester |
| CN102589936A (en) * | 2012-01-12 | 2012-07-18 | 中国科学院地理科学与资源研究所 | Device and method for synchronously collecting atmosphere CO2 and water vapor samples |
Non-Patent Citations (5)
| Title |
|---|
| 中国科学院技术条件及进出口局 中国科学院干部进修学院: "《科学器材试用教材 仪器仪表部分 第12部分 真空设备及检测仪器》", 30 June 1982, article "第三节 冷阱", pages: 63-64 * |
| 刘玉岱: "《真空测量与检漏》", 31 October 1992, article "各种检漏方法", pages: 133-134 * |
| 朱毓坤等: "《中国环流器HL和欧洲联合环JET的检漏技术进展》", 《真空与低温》, vol. 12, no. 2, 30 June 2006 (2006-06-30), pages 63 - 67 * |
| 沈昌观: "实验室真空技术检漏", 《试验室研究与探索》, no. 2, 29 February 1992 (1992-02-29), pages 58 - 59 * |
| 顾伯勤: "《温度和伪泄露率对真空静态升压法检漏的影响》", 《南京化工大学学报》, vol. 20, no. 4, 31 October 1998 (1998-10-31), pages 25 - 28 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024335A (en) * | 2019-12-30 | 2020-04-17 | 中核兰州铀浓缩有限公司 | Static boosting freezing measurement device and method for container vacuum test |
| CN115531907A (en) * | 2022-08-19 | 2022-12-30 | 安徽贝意克智能科技有限公司 | Down-loading type cold trap structure and sublimation instrument |
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Application publication date: 20130403 |