SU930059A1 - Device for testing tubular specimens by internal pressure under low temperatures - Google Patents

Description

(5) DEVICE FOR TUBULAR SAMPLES TESTING WITH INTERNAL PRESSURE AT LOW TEMPERATURES

one

The invention relates to a testing technique and can be used when testing tubular samples with internal pressure at low temperatures.

A device for testing hollow articles with internal pressure at low temperatures is known, comprising a housing, a protective screen housed therein, means for fixing a test sample, means for creating pressure inside the sample, a means for cooling the sample, made in the form of a thin-walled container placed inside the protective screen coolant and intended for placement in it of the test specimen, mounted on a protective screen pipe, the end of which is removed from the body, and installed in the pipe ke diaphragm ruptured when a test specimen is destroyed tl.

The disadvantage of the scaled device is the complexity of its operation, since after testing it is necessary to replace the thin-walled container and the diaphragm, which is destroyed by the test.

The purpose of the invention is to simplify the operation of the device.

This goal is achieved by the fact that the device comprises a housing, a protective shield disposed therein.

10 with means for fastening the test specimen inside it, means for creating pressure inside the specimen and means for cooling the specimen, is provided with a casing that covers an evacuated gap, and the cooling means is designed as a flow-type cooler placed inside the specimen, mounted on a protective screen and connected with the space between the housing and the protective screen.

Claims (1)

The drawing shows the described device. 39 It contains a casing 1 enclosing the housing 3 with a vacuum gap 2, a protective shield mounted on the flange 5. The flange 5 is connected to the lower thrust 6. In the hollow upper thrust rod 7 there is a pipe 8 for injecting high pressure working medium into the cavity of the test sample 9 - On the flange 5 there is mounted a flow cooler 10 with an overflow pipe 11. The inlet 12 and outlet 13 channels of the refrigerator Yu pass through the flange 5, communicating with the refrigerator with the space between the housing 3 and the protective screen. The protective shield k is connected with a casing And in which a fitting 15 for supplying neutral gas is located, and a safety valve 16. The connection of the casing T to the upper draft 7 is sealed by a seal 17. The removable cover 18 of the casing 3 contains the casing 19 of the casing outlet I, a seal. There are 20 openings for introducing the overflow tube 21 and the seal 22 of the discharge channel 13 of the refrigerator 10. The device operates as follows. The test sample 8 assembled with a protective screen C and its loading and cooling systems are introduced into the ratio 3, which, in turn, is inserted into the casing 1 and the cover 18, close the gap between the casing 1 and the casing 3 is evacuated, which allows to improve the thermal insulation of the housing 3 by reducing the heat leakage to it from the outside. The flange 5 is fastened with the lower thrust 6. The housing 3 is filled with liquid nitrogen, as a result of which the housing 3 is cooled with all the parts inserted into it, and then the liquid nitrogen is removed. 6 and 7 are secured in the grippers of a testing machine (not shown). A high pressure working medium is supplied through pipe 8, and a neutral gas is fed through fitting 15. Through the overflow tube 21, the housing 3 is filled with a liquid refrigerant and after reaching the predetermined temperature, the sample 9 is loaded with a predetermined force and internal pressure. The device is easy to operate, since, providing reliable cooling of the sample when tested by internal pressure, does not require replacing its individual parts after testing. Claims An apparatus for testing tubular specimens with internal pressure at low temperatures, comprising a housing, a protective shield disposed therein with means of fastening the test specimen inside it, a means of creating pressure inside the specimen, and a means of cooling the specimen, so as to simplify operation , it is equipped with a casing enclosing the housing with a vacuumed gap, and the cooling means is designed as a flow-type cooler placed inside the sample; it is fixed on the protective screen and communicated with the space between the case and the protective screen. Sources of information taken into account in the examination 1. USSR author's certificate of the application No. 2 AOBB7 / 25-28, cl. G 01 N 3/18, 1977 (prototype).