RU1803751C - Device for testing hollow articles for tightness - Google Patents

Abstract

Usage: leakproofness testing devices for housings with both ends open. SUBSTANCE: cylindrical groove 2 is made in base 1. Compressed gas is supplied under the test pressure to the supra-piston cavity of groove 2. A plug 8 with O-rings and a chamber 9 are put on the piston rod 5.

Description

the test body 11 seals the sealing ring 10. The chamber 9 is sealed by a ring 12 on one side and a sleeve 14 on the other. From below, the housing 11 is sealed by a seal 13, Ring 15, mounted on

the rod 5, in the lower position, contacts the valve 16. In the cover 17, channels 19 are made connecting the internal cavity of the housing 11 with the groove 2 through the valve 16. 1 zp, f-l, 1 ill.

The invention relates to the field of testing technology and is used for leak testing of cylindrical bodies with both ends open.

The purpose of the invention is to increase test performance.

The drawing shows a diagram of a device for testing enclosures.

 The device consists of a base 1, in which a cylindrical groove 2 is made. A piston 3 with a seal 4 is installed in the groove. The piston 3 is provided with a rod 5, at the end of which an easily detachable connection is made, consisting, for example, of a groove with a head 6 and a C-shaped washer 7, A plug 8 with two o-rings and a chamber 9 are fitted on the stem 5. The o-ring 10 seals the test casing 11 from above, and the chamber 9 is sealed on one side by the chamber 9. On the other hand, the test casing is sealed by a seal 13, and the chambers 9 - seal 14, designed as a cuff. A ring 15 is fixed on the stem 5 at such a height that it contacts the valve 16 located in the cover 17 installed on the base through the gasket 18. In the cover 17, channels 19 are made connecting the internal cavity of the body with the groove 2 through the valve 16. A compressed gas system, a pneumatic relay 21 connected via a switch 22 to a controlled valve 20, and a two-limit low-pressure meter 23 connected to the indication and time unit 24 are connected to the chamber 9 through a controlled valve 20. When testing the housings with high pressures, the chamber must be equipped with a safety valve.

The device operates as follows.

Compressed gas is supplied into the supra-piston cavity of the groove 2 under a pressure corresponding to the test pressure. The piston with the rod is lowered down, the test body is sealed on both sides by the piston and the test chamber is on top. By applying pressure to the cuff 14, the chamber 9 is sealed from below. At the same time, the ring 15 opens the valve 16 and the pressure enters the test casing through the channels 19. If the Braque signal in the block 24 is not correct, turn on the controlled valve 22 with the switch 22 and the pressure in the test chamber increases by a small amount (200-500 Pa) .

When the set pressure is reached, the pneumatic zone shuts off valve 20 and the pressure in the chamber must remain

unchanged, in this case, after a given time interval, the Godden signal will light up. If during the test the pressure in the chamber rises, the Marriage signal will light up, and if it decreases, the signal

The camera is leaking. After the end of the tests, the pressure is released from the cavity 2, the test casing, the cuff cavity 14 and pressure is applied under the piston 3. The piston releases the casing, chamber, and C-shaped washer. The washer, camera and housing are removed and new ones are installed. The cycle repeats,,

Claims (2)

1. Device for testing hollow yzdeliy for tightness, comprising a housing with an end seal for the product and with a channel for supplying a working medium to the product, a cover with a plug with an end seal for the product and with an O-ring seal ps edge, a cylinder with a piston, the rod of which the free end is connected to the cover, the source of the working medium connected to the rod and rodless cavities of the cylinder, the valve and leak indicator connected to the cavity of the cover, characterized in that, in order to simplify and reduce the time for preparatory operations, the cylinder is mounted on housing opposite to the cover coaxially with it, so that its end wall is formed by a body having a hole through which a rod passes, having a protrusion located outside the cylinder cavity, and the valve is placed in the body channel with the possibility of opening when interacting with the rod protrusion. 2. The device according to claim 1, the clause being that in order to increase reliability and sensitivity, the cover is made in the form of a cap and the ring seal of the cover is made radial.