SU680409A1 - Apparatus for checking tightness of products - Google Patents

Abstract

1. DEVICE FOR CONTROLLING THE TIGHTNESS OF PRODUCTS, containing the source and separator of working and control media, a probe with annular chambers forming closed cavities of small volume with the internal surfaces of the product, a line for supplying the working medium from its source to the chambers and cavities and an actuator for moving probe along the controlled product, characterized in that, in order to improve the performance and quality of the test, it is equipped with additional lines passing through the probe according to the number of cavities monitored alternately communicating with the separator of the working and control media and their source. A device according to claim 1, characterized in that the chambers of the probe are reinforced with sealing rollers of elastic material. The device according to claim 1, wherein it is equipped with an indicator of the position of the probe when it is moved inside the product.

Description

ot

00

about . about with

The device relates to the field of engineering and can be used to control the tightness of large-sized hollow products. A device is known for monitoring the tightness of hollow large-sized products, for example rail tank cars, containing a solid telescope introduced into the cavity of products and forming a small volume cavity with all-wall products, sources of working medium and main for supplying it to the resulting cavity 1 to carry out quality control of tightness in individual areas requires a large consumption of working or control media In addition, this device does not allow for the control of hollow products that have a significant extent, such as pipelines, due to the absence of restrictive chambers and a device for moving the probe. The closest technical solution to the invention is a device for monitoring the leaktightness of products, containing a source and separator of working and control media, a probe with annular chambers forming closed cavities of small volume with internal surfaces from the compartment. the medium from its source to the chambers and cavities and the drive for moving the probe along the controlled product G 2. However, this device does not allow to increase the test performance due to an increase in the gas content of the workplace as a result of the output of test gas from small cavities when the probe is moved along the product under test. In addition, to ensure reliable sealing in the chambers of the probe, it is necessary to create a large pressure of the working medium, the probe does not have an indicator of its position, which leads to the omission of leaks or rechecking of the areas already tested. The aim of the invention is to increase the productivity and quality of the tests. The goal is achieved by the fact that the device is provided with additional lines passing through the probe according to the number of controlled cavities, alternately communicating with the separator of the working and control media and their source. In addition, the probe chambers are reinforced with sealing rollers of elastic material, and the device is equipped with a probe position indicator as it moves inside the product. FIG. 1 shows a diagram of the device in FIG. 2 — node I in FIG. 1. The device contains a probe 1 installed in the product 2, a source of working medium (not shown), lines 3 connecting the source of working medium to the sealing chambers 4 and 5, which are reinforced with a sealing roller 6 of elastic material, a small volume cavity 7, 8 formed by the probe and the product, the source 9 of the control medium, line 10, connecting the Source and the cavity. The device also contains spring-loaded rollers 11 of the device for moving the probe inside the product, the probe position indicator, outwardly disposed, the vacuum pump 12 and the separator 13. The device monitors tightness as follows. Probe 1 is installed in item 2 at the test site. From the source along the line m 3, the working medium, such as compressed air, fills chambers 4 and 5. The rollers 6, the reinforcing chambers, provide a small contact area of the chamber with the inner surface of the product being tested, which leads to a decrease in pressure in the chambers. In the cavity 7 and 8 of a small volume, from the source 9 a test medium, for example helium, is supplied via line 10 and the presence of a leak is detected by a leak detector (not shown). The probed area is recorded using the probe position indicator, which is positioned outside. Before turning the probe to control the next surface area of the product, the cavity is evacuated and rinsed with working medium — compressed gas. The resulting mixture of working and control media is removed from the cavity using a vacuum pump 12 to separator 13, from which a separate control gas is returned to the source - tank 9. Then, in

Chambers 4 and 5 reduce pressure and freely by means of an actuator (not shown) and spring-loaded rollers 11, the probe moves to control the next section of the product.

Separate feeding of the sealing chambers 4 and 5 with the working medium ensures reliability when monitoring tightness in the event of one of them failing.

Claims (1)

1. DEVICE FOR MONITORING PRODUCTS, containing a source and a separator of the working and control media, a probe with annular chambers forming closed cavities of small volume with the internal surfaces of the product, a line for supplying the working medium from its source to the chambers and cavities, and a drive for moving the probe along the controlled product, characterized in that, in order to increase the productivity and quality of the tests, it is equipped with additional lines passing through the probe according to the number of controlled cavities, operemenno separator communicating with the working and reference environments and their source.