SU836440A1 - Locking arrangement - Google Patents

Description

one

The invention relates to a valve structure and can be used to shut off pipelines under conditions of elevated working and environmental temperatures.

Known locking devices, in which the drive of the zapszrnogo body made ohlazhdenilm 1.

It is also known to have a locking device in the casing of which a locking member is mounted associated with an actuator housed in a housing mounted on the casing with openings for Lrokhod of the cooling medium 2.

In the known device for cooling the drive and the housing, natural convection of the surrounding air is used, which does not provide reliable cooling of the device at high temperatures of the working and environment.

The purpose of the invention is to increase its performance at high working and environmental temperatures.

The goal is achieved by installing an ejector package with mixing chambers and a source of increased heat pressure, with the input

the ejector nozzles are communicated with the specified source mixing chamber connected by channels with the internal cavity of the casing, and the output nozzles are directed to the side of the support drive.

FIG. 1 shows a diagram of the locking device; in fig. 2 shows section A-A in FIG. one.

In device case 1 with a channel

0 2 for the passage of the working medium in supports 3 and 4, a locking member 5 connected by a cam gear consisting of a driver 6 and a cam 7 is electrically driven 8. 5 The actuator is closed outside by a casing 9 which is connected to the tube 10, the free end of which 11 It is brought out of the zone with elevated temperature and is connected to the atmosphere.

0 On the bottom wall of the casing there is a package of ejectors 12, the mixing chambers 13 of which are connected by radial channels 14 with the internal cavity of the casing. Inlet nozzles 15

5 ejectors are connected by a collector

16 and connected to an external source

17 increased air pressure, the temperature of which is below temperature. working environment tours. Ejectors

0 are placed around support 4 such

that their exit nozzles 18 are directed towards the support.

When the device operates, hot air passes through channel 2 of housing 1, heating valve 5, heat through bearing 4, driver 6 and cam 7 is transferred to actuator 8. In addition, heat from the environment is transmitted to actuator through housing 9. Air under increased pressure from the source 17, entering the manifold 16, is distributed through ejectors and, having flowed out of the nozzles 15, creates a vacuum in the mixing chambers 13, due to which cold air from the inlet 11 of the tube 10 is sucked under the casing and through the channels 14 enters the ejector and mixed with the air coming out of the nozzles 1 Cold air passing under the casing through the tube with a small flow rate isolates the drive from the heated external environment, and the 18 jets of mixed air leaving the nozzles cool the support and .pritok heat from the actuator body.

Claims (2)

1. USSR author's certificate number 4176.69, cl. F 16 K 49/00, 1972. 2. US Patent 2177825, Cl.137-340 publ. 1939 with -2 f6 FIG. 2