阅读说明：本技术 一种多用途低温容器零件漏率检测模拟器 (Multipurpose low temperature container part leak rate detection simulator ) 是由 熊芳芳 尤振宇 海航 朱长永 卢曦 于 2021-06-28 设计创作，主要内容包括：本发明公开一种多用途低温容器零件漏率检测模拟器,涉及低温压力容器领域,包括主箱体,所述主箱体为圆柱形,且主箱体的两端分别焊接有卡套接头式和法兰式抽真空接口,且主箱体两侧还均匀开出六个圆孔,每个圆孔连接有一根连接管,通过一个模拟器上,一次连接多种规格的真空部件,实现多部件批量测量,通过两种不同的测量方式进行测量,再将两种结果进行对比,使得得到的漏率数据更准确,模拟器不仅可以对正常产品部件,进行来料抽查检测,保证产品质量的一致性,也可以在开发新部件时,进行前期开发测试,缩短开发周期。(The invention discloses a multipurpose simulator for detecting leakage rate of low-temperature container parts, which relates to the field of low-temperature pressure containers and comprises a main box body, wherein the main box body is cylindrical, clamping sleeve joint type and flange type vacuumizing interfaces are respectively welded at two ends of the main box body, six circular holes are uniformly formed in two sides of the main box body, each circular hole is connected with a connecting pipe, vacuum parts of various specifications are connected on one simulator at one time, multi-part batch measurement is realized, measurement is carried out through two different measurement modes, and then two results are compared, so that the obtained leakage rate data are more accurate.)

1. The multipurpose simulator for detecting the leakage rate of the low-temperature container parts is characterized by comprising a main box body (9), wherein the main box body (9) is cylindrical, clamping sleeve joint type and flange type vacuumizing interfaces are respectively welded at two ends of the main box body (9), six circular holes are uniformly formed in two sides of the main box body (9), and each circular hole is connected with a connecting pipe (10);

wherein the outer port department of three connecting pipes (10) in the outside is connected with DN80 explosion vent (1), DN100 explosion vent (2) and DN100 rupture disk explosion vent (3) respectively, and the outer port department of three connecting pipes (10) in the inboard is connected with resistance gauge pipe (4), compound gauge pipe (5) and thermocouple gauge pipe (6) respectively, the main tank body (9) fixed connection is on stay tube (11).

2. The multipurpose low temperature container part leak rate detection simulator of claim 1, wherein: the clamping sleeve joint type vacuumizing interface at the left end of the main box body (9) is a vacuum piston (8), the flange type vacuumizing interface at the right end is a vacuumizing valve (7), and the vacuumizing valve (7) and the vacuum piston (8) can be connected with an external air pump.

3. The multipurpose low temperature container part leak rate detection simulator of claim 1, wherein: DN80 explosion-proof mouth (1), DN100 explosion-proof mouth (2) and DN100 rupture disk explosion-proof mouth (3) are connected with connecting pipe (10) through connecting shrouding one (12), connecting shrouding two (13) and connecting shrouding three (14) respectively.

4. The testing method using the multi-purpose low-temperature container part leak rate detection simulator of claim 1, wherein: the method comprises the following steps:

the method comprises the following steps:

covering the whole detection simulator through a large helium cover, and carrying out overall measurement to obtain the overall leakage rate;

step two:

exposing each detection part out of the helium cover one by one, measuring the total leakage rate of the rest parts, and calculating through difference values to obtain the individual leakage rate of each part;

step three:

respectively carrying out individual experiments on each part through a small helium cover, and measuring the leakage rate of each part;

step four:

and comparing the single leakage rate of each part obtained in the second step and the third step to obtain more accurate leakage rate of each part.

5. The method of testing a part leak rate detection simulator of claim 4, wherein: the large helium cap and the small helium cap are both thin film helium caps.

Technical Field

The invention relates to the field of low-temperature pressure containers, in particular to a multipurpose low-temperature container part leakage rate detection simulator.

Background

The low-temperature pressure container utilizes the inner container and the outer container to vacuumize the intermediate interlayer, and achieves the effect that low-temperature liquid at minus 160 ℃ can be stored in the low-temperature pressure container. The sealing performance-leakage rate of each part of the vacuum interlayer can affect the performance of the whole product.

At present, low-temperature container manufacturing enterprises pay more attention to the whole leakage rate value of the whole product, the leakage rate of a single component refers to a type test provided by a part manufacturing enterprise, and generally, in the initial stage of component development, a production enterprise entrusts a professional detection unit to carry out the leakage rate test, and after formal batch production, manufacturers do no detection any more.

Low temperature container, required to have an overall leak rate of 1X 10^-9Pa.m³The leakage rate of the vacuum part is required to be higher by one order of magnitude, 10^-10Pa.m³The grade/s is preferably as high as possible. And more vacuum connecting parts: and connecting valves, joints and the like of the vacuum port, the vacuumizing port and the explosion-proof port, and welding deformation and riveting sealing quality of each interface. The influence factors of the leakage rate are numerous, the existing equipment is not used for measurement, and the optimization and the model selection of the vacuum component are not facilitated.

Disclosure of Invention

The invention aims to provide a multipurpose low-temperature container part leakage rate detection simulator, which is characterized in that vacuum components of various specifications are connected to one simulator at one time to realize multi-component batch measurement, measurement is carried out in two different measurement modes, and then two results are compared, so that the obtained leakage rate data is more accurate.

A multi-purpose low-temperature container part leakage rate detection simulator comprises a main box body, wherein the main box body is cylindrical, clamping sleeve joint type and flange type vacuumizing interfaces are welded at two ends of the main box body respectively, six round holes are uniformly formed in two sides of the main box body, and each round hole is connected with a connecting pipe;

wherein the outer port department of three connecting pipes in the outside is connected with DN explosion vent, DN explosion vent and DN rupture disk explosion vent respectively, and the outer port department of three connecting pipes in the inboard is connected with resistance caliber, compound caliber and thermocouple caliber respectively, main tank body fixed connection is on the stay tube.

Preferably, the clamping sleeve joint type vacuumizing interface at the left end of the main box body is a vacuum piston, the flange type vacuumizing interface at the right end of the main box body is a vacuumizing valve, and the vacuumizing valve and the vacuum piston can be connected with an external air pump.

Preferably, the DN explosion-proof opening and the DN rupture disk explosion-proof opening are respectively connected with the connecting pipe through a first connecting sealing plate, a second connecting sealing plate and a third connecting sealing plate.

The test method using the multipurpose low-temperature container part leakage rate detection simulator comprises the following steps:

the method comprises the following steps:

covering the whole detection simulator through a large helium cover, and carrying out overall measurement to obtain the overall leakage rate;

step two:

exposing each detection part out of the helium cover one by one, measuring the total leakage rate of the rest parts, and calculating through difference values to obtain the individual leakage rate of each part;

step three:

respectively carrying out individual experiments on each part through a small helium cover, and measuring the leakage rate of each part;

step four:

and comparing the single leakage rate of each part obtained in the second step and the third step to obtain more accurate leakage rate of each part.

Preferably, the large helium enclosure and the small helium enclosure are both thin film helium enclosures.

The invention has the advantages that: simple structure uses in a flexible way, through on a simulator, once connects the vacuum part of multiple specification, realizes that multicomponent is measured in batches, measures through two kinds of different measurement methods, compares two kinds of results again for the leak rate data that obtains is more accurate, and the simulator not only can be to normal product part, carries out the supplied materials spot check and detects, guarantees product quality's uniformity, also can carry out earlier stage development test when developing new part, shortens development cycle.

Drawings

FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;

FIG. 2 is a top view of the apparatus of the present invention;

FIG. 3 is a front view of the apparatus of the present invention;

the explosion-proof device comprises 1, DN80 explosion-proof ports, 2, DN100 explosion-proof ports, 3, DN100 explosion-proof ports, 4, resistance gauges, 5, composite gauges, 6, thermocouple gauges, 7, a vacuum-pumping valve, 8, a vacuum piston, 9, a main box body, 10, a connecting pipe, 11, a supporting pipe, 12, a first connecting sealing plate, 13, a second connecting sealing plate, 14 and a third connecting sealing plate.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 3, the multipurpose simulator for detecting the leakage rate of the low-temperature container parts comprises a main box body 9, wherein the main box body 9 is cylindrical, clamping sleeve joint type and flange type vacuumizing interfaces are respectively welded at two ends of the main box body 9, six circular holes are uniformly formed in two sides of the main box body 9, and each circular hole is connected with a connecting pipe 10;

wherein the outer port department of three connecting pipes 10 in the outside is connected with DN80 explosion vent 1, DN100 explosion vent 2 and DN100 rupture disk explosion vent 3 respectively, and the outer port department of three connecting pipes 10 in the inside is connected with resistance gauge 4, compound gauge 5 and thermocouple gauge 6 respectively, the main tank body 9 fixed connection is on the stay tube 11.

The clamping sleeve joint type vacuumizing interface at the left end of the main box body 9 is a vacuum piston 8, the flange type vacuumizing interface at the right end is a vacuumizing valve 7, and the vacuumizing valve 7 and the vacuum piston 8 can be connected with an external air pump.

The DN80 explosion-proof port 1, the DN100 explosion-proof port 2 and the DN100 rupture disk explosion-proof port 3 are respectively connected with the connecting pipe 10 through a first connecting seal plate 12, a second connecting seal plate 13 and a third connecting seal plate 14.

The test method using the multipurpose low-temperature container part leakage rate detection simulator comprises the following steps:

the method comprises the following steps:

covering the whole detection simulator through a large helium cover, and carrying out overall measurement to obtain the overall leakage rate;

step two:

exposing each detection part out of the helium cover one by one, measuring the total leakage rate of the rest parts, and calculating through difference values to obtain the individual leakage rate of each part;

step three:

respectively carrying out individual experiments on each part through a small helium cover, and measuring the leakage rate of each part;

step four:

and comparing the single leakage rate of each part obtained in the second step and the third step to obtain more accurate leakage rate of each part.

The large helium cap and the small helium cap are both thin film helium caps.

Detailed description of the preferred embodiments and principles

The left end of the main box body 9 is provided with a vacuum piston 8, the right end is provided with a vacuum valve 7, the vacuum valve 7 and the vacuum piston 8 are connected with an external air pump, the outer ports of the three connecting pipes 10 outside the main box body 9 are respectively connected with a DN80 explosion-proof port 1, a DN100 explosion-proof port 2 and a DN100 explosion-proof piece 3, and the outer ports of the three connecting pipes 10 inside the main box body 9 are respectively connected with a resistance gauge 4, a composite gauge 5 and a thermocouple gauge 6.

When the test is carried out, the test paper is put into practical use,

covering the whole detection simulator through a large helium cover, and carrying out overall measurement to obtain the overall leakage rate;

then exposing each detection part out of the helium cover one by one, measuring the total leakage rate of the rest parts after each detection part is exposed, and calculating through a difference value to obtain the single leakage rate of each part;

then, carrying out a second test, and respectively carrying out individual experiments on each part through a small helium cover to measure the leakage rate of each part;

and comparing the two-side independent leakage rate data of each part obtained by the two tests to obtain more accurate leakage rate of each part.

Based on the above, the multi-component batch measurement device is simple in structure and flexible to use, multiple components are measured in batches by connecting vacuum components of multiple specifications on one simulator at one time, measurement is performed by two different measurement modes, and then the two results are compared, so that the obtained leakage rate data is more accurate.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.