SU529307A1 - Valve Pair Test Device - Google Patents

Description

one

The invention relates to the field of testing valves for reliability and durability and can be used for conducting accelerated tests.

Apparatuses for testing a valve-saddle pair are known by pumping a working fluid through two channels connected to the super-and sub-valve cavities of the test pair, which are periodically blocked by distributors.

However, aggressive liquids in known devices operate not only the tested nodes, but; i the main device nodes.

The proposed device is distinguished by the fact that in the channels connecting the supra and subvalvate cavities with the source of working fluid, separators are installed, made in the form of two cylinders with freely movable pistons; On the one hand, to which the driven fluid flows, and on the other hand, there is the working fluid, with the over- and sub-valve cavities being connected to each other xananoNi, in which the Zstanevle choke.

This makes it possible to delimit the working fluid and thereby catch the longevity of the main components of the device.

On fng. 1 shows the general scheme of the proposed device; ka fig. 2 is a transverse section of the hydraulic distributor.

The device consists of a pump 1, creating pressure in the main system, a hydroaccumulator 2, tenderness 3 with a working fluid, supplying by ground through a pipe-eelectric 4 to Hmdravlissky: ;; cn-cp 5, a joint Trp 6onpDi5o; iaMH (e and 7 with separators 8 and 9, which in turn are connected to the exhausted pair 1O, Above and subclapainum of a cavity 11 n 12 and correspondingly; the left and left parts of the separators are filled with liquid ;; and 0 , the weight of the other nodes is filled;

The test pair has an adjustable throttle 13 connecting the over- and sub-valve cavities. With its help, it establishes 5 the required pressure drop for each pair. The hydraulic distributor 5 has lines 14 serving to drain the drive fluid from. right cavities separators 8 and 9 during the return stroke of the piston. The rotation of the distributor 5 is carried out from the electric motor 5 of the engine 15 through a gearbox or vibrator 16. The device operates as follows. Pump 1 delivers drive (clean) fluid through the valve 5 alternately B separators 8 and 9,

Getting into the separator 8, the fluid presses on the piston, which pumps the working (abrasive or aggressive) fluid into the cavity 12 and through the test pair into the left cavity of the separator 9, causing its piston to move to the right. The drive fluid from the right cavity through the drain line 1.4 and the hydraulic distributor 5 is discharged into the container 3. This simulates the actuation of the vapor when a fluid is pumped through it.

When switching the distributor 5, the driven fluid passes into the right-hand cavity of the separator 9 and forces its piston to the left. The abrasive or aggressive fluid is injected into the nicked cavity and the valve is seated on the seat.

Adjustable throttle 13 creates the necessary pressure on the valve during the flow of liquid.

Claims (1)

Invention Formula A device for testing a valve pair - a saddle or one of its elements by pumping a working fluid through two channels connected to the super- and subvalvular cavities of the test pair, periodically blocked by distributors, characterized in that, in order to delimit the working fluid (bearing abrasive or aggressive) from the drive, in the channels connecting the over - and subvalvular cavity with a source of working fluid, separators are installed, made in the form of two cylinders, with freely movable pistons, on one side to which the drive fluid comes from the pressure source, and on the other, there is the working fluid, with the over - and subvalvular cavities interconnected by a channel in which the drosse is installed. 5293О7 Pass through the choke, aggressive or abrasive fluid enters the cavity 12 under the valve, and then into the separator 8 and moves the separator piston to the right. The drive fluid from the right cavity of the separator 8 is discharged through the distributor 5 into the container. This modulates the triggering of the pair when pressure is applied to the closure.