SU237431A1

SU237431A1 -

Info

Publication number: SU237431A1
Application number: SU1199220A
Authority: SU
Inventors: М. Абрамов Е.; В. К. Шаповалов Е. М. Абрамов; В. К. Шаповалов
Original assignee: М. Абрамов Е.; В. К. Шаповалов
Priority date: 1967-11-24
Filing date: 1967-11-24
Publication date: 1968-11-30

Description

Изобретение относитс к технике испы- та1га изделий на наличие течей и может найти применение при изготовлении полых герметичных изделий.The invention relates to a technique for testing products for the presence of leaks and may find application in the manufacture of hollow hermetic products.

Известен способ контрол герметичности изделий, основа1шый на измерении прираше)- ни давлени в предварительно от вакуумированной полости издели за определенный промежуток времени fll.The known method of controlling the tightness of products, based on the measurement of prirashe), is neither the pressure in the pre-vacuumized cavity of the product for a certain period of time fll.

Однако указаршый способ характеризуетс низкой точностью, и необходимостью созда1П{ вакуума в полости издели , что ограничивает его использование. Этот способ не применим, например, дл контрол герметичности тонкосте1шых изделий.However, the above method is characterized by low accuracy and the need to create a vacuum in the cavity of the product, which limits its use. This method is not applicable, for example, to control the tightness of thin-walled products.

Наиболее близким к данному изобретению по техршческой сущности и достигаемому результату вл етс способ контрол герметичности изделий , заключающийс в том, что изделие помещают в замкнутую емкость, создают перепад давлений, выдерживают определенное врем и измер ют скорость изменени давлени в полости издели или в емкости..The closest to this invention in terms of its technical nature and the achieved result is a method for monitoring the tightness of products, which means that the product is placed in a closed container, a pressure differential is created, a certain time is maintained, and the rate of pressure change is measured in the cavity of the product or in the container.

Однако этот способ отличаетс низкой точностью, св занной с малой скоростью измнени давлени , поэтому указанное ограни4ejffie не позвол ет использовать его дл определет1 малых течей.However, this method is distinguished by low accuracy associated with a low rate of pressure measurement, therefore the indicated restriction does not allow it to be used to detect small leaks.

Целью изобретени вл етс повышение точности контрол герметичности.The aim of the invention is to improve the accuracy of leakage control.

Цель достигаетс тем, что после выдержки издели под перепадом давлений емкость соедин ют с источником первоначального давлегш через канал с пропускной способностью большей, чем течи, а измерение изменени давлени осуществл ют в момент соединени емкости с источником первоначального давлени .The goal is achieved by the fact that after holding the product under a differential pressure, the tank is connected to the source of the initial pressure through a channel with a capacity greater than the leakage, and the measurement of pressure change is carried out at the moment of connecting the tank to the source of the initial pressure.

Claims

Example 1. In a controlled product, a pressure differential is created (either by pumping out air from the product, or by supplying gas under pressure). The magnitude of the differential depends on the mechanical strength of the product. The product is then kept for a certain time and is connected through a channel with a capacity greater than the leakage to a volume in which the pressure is equal to the initially created iy in the product. At the time of opening the channel, the velocity and pressure measured by means of electrochemical are measured. Example 2 If it is required to create a pressure in the outer confined space of the product that is different from the atmospheric pressure, in this case the product is placed in a closed container. The measurement of the rate of pressure change is made either in the product or in the vessel, depending on which source of the initial pressure (product or vessel) is connected to. Claims The method of monitoring the leaktightness of products, is that the product is placed in a closed container, pressure drops are created on the walls of the product, the product can withstand a certain time, and the rate of pressure change in the vessel is measured, characterized in that control ger-. meticulousness, after the aforementioned delay. The vessel is connected to an initial pressure source through a channel with a capacity greater than the leakage, and the pressure change is measured at the time the vessel is connected to the original pressure source. Sources of information taken into account in the examination: 1.Lapis V.A., Levin L.E. Technique of vacuum tests, Tosenergoizdat 1963, p. 122-123.

2. The copyright certificate number 45106, cl. Q 01 m 3/26, 1935.