SU706724A1 - Device for fluid-tightness testing of articles - Google Patents

Description

The invention relates to the field of testing, namely, rotary vacuum devices for monitoring the tightness of products of various sizes and shapes, as well as for controlling the dimensions of the bore of small openings that cannot be controlled by mechanical devices, such as rigid gauges.

A device for monitoring the tightness of products is known, comprising a rotor, a vacuum pump, valves, containers with a device for measuring pressure 1.

However, in this device, the vacuum value is constantly changing, which entails a change in the inspection time of the part.

The closest to the invention to the technical essence and the achieved effect is a device for monitoring the tightness of products, containing a rotor with an internal cavity and working positions with a fastening system for controlled products, valves that serve to connect the cavities of products with an evacuation system and the atmosphere, caps under which controlled items 2 are located.

This device also can not be used to control products of various sizes, as it is limited by the size of caps, the increase of which is impractical because it will lead to cumbersome rotor design. In addition, the design is unsuitable for controlling the flow area of products and is practically not suitable for operation in automatic mode.

The aim of the invention is to increase the productivity of control products of various sizes.

For this, the proposed device is equipped with a compensating tank with a control man-vacuum meter, the cavity of which is connected to the internal cavity of the rotor. In addition, in order to ensure control of products with different flow areas, the device is equipped with containers of various volumes according to the number of working positions mounted on the rotor near the latter and connected to them by their internal cavities.

Capacities of various volumes are installed by the heat exchanger |

The drawing shows a device for monitoring the tightness of products, a general view. The device contains a vacuum pump i, a rotating rotor 2, a vacuum compensating tank 3 located between the rotor and the pump with a control manovacuum meter 4. The rotor 2 is made with a sealed cavity 5, which is permanently connected to the vacuum compensating tank 3 via an air-release clutch b. Each working position 7 is made with a sealed cavity 8 and has two valves 9 and 10, which are used for connection through the cavity 5 with the vacuum system 11 and with the atmosphere. The valves are controlled by cams 12 and 13. For sealing, while controlling the connection of the product with the working position, an elastic gasket 14 with a hole 15 is fixed on the latter. the volume of the cavity 5 working position. The smaller the internal volume, the greater the amount of space to have. The capacity for an increase in pressure equalization time Btiy Three parts with atmospheric pressure. The device has a tray 17 for defective and a tray 18 for suitable products 19.

The device works as follows.

The vacuum pump I creates a vacuum, the specified value of which is maintained by a compensating capacitance 3 with a control manovacimeter 4. In the initial position 1, the product is pressed to the elastic gasket 14. At this time, the valve 9 is open and the air from the cavity 5 is pumped out by the pump 1 through the compensating tank 3 When the rotor 2 rotates, the valve 9 closes. If the part is sealed, then it passes the tray 17 of defective products and falls into the tray 18 of usable products, when the valve 10 hits the protrusion of the cam 12, connecting the cavity 8 with the atmosphere. In the case of leakage of the product, air from the atmosphere passes through it into the cavity 8, in which atmospheric pressure is established, and the product falls into the tray 17 of defective products. The magnitude of the vacuum is established depending on the weight of the products being monitored, the elasticity of the gasket 14 and the speed of rotation of the rotor. When controlling the size of the bore hole in the process, replaceable containers 16 are involved in the process. All operations carried out with this control are the same as in the leak test. The products are separated from the working position in the following order: first they fall away from the elastic gasket of the product with a cross section greater than the nominal, then with a predetermined cross section (suitable), and finally with a smaller cross section than the nominal. Products with a flow section of more or less nominal flow through the trays into the corresponding bunkers of defective products.

Claims (3)

Invention Formula . A device for controlling the fever of products, containing a rotor with an internal cavity and working positions with a fastening system for controlled products, valves that serve to connect the cavities of products with a vacuum system and the atmosphere, characterized in that volume, it is equipped with a compensating capacity, with a control mano vacuum gauge, the cavity of which is connected to the internal cavity of the rotor. 2. A device according to claim I, characterized in that, in order to provide a claw of products with different flow areas, it is provided with containers of various volumes according to the number of working positions mounted on the rotor near the latter and connected to them by their internal cavities. 3. The device according to paragraphs. 1 and 2, characterized in that the containers of different volumes are mounted on the rotor by means of detachable connections. Sources of information taken into account in the examination 1.Lanis V.A., Levina L.E. Technique j vacuum tests. M.L., Gosenergoizdat, 1963, p. 94 - 98. 2.Patent of France No. 2182425, cl. G 01 M 3/00, 1974 (prototype).