SU759881A1 - Apparatus for fluid-tightness testing of delivery and suction valves of engine petrol pumps - Google Patents

Description

The invention relates to the field of testing products for tightness, in particular for testing injection and suction valves.

Known installation for testing the leak tightness of the injection and suction valves of gasoline engines, comprising a housing with means for fastening and sealing the test valves, a source of vacuum, made in the form of an ejector, the cavity of which is connected to the cavity of the suction valves, connecting pipelines with controlled valves and vacuum gauge, and also '15 additional means for testing valves with overpressure 11].

The disadvantage of the installation is low productivity, due to the fact that the tests of suction and discharge valves are performed separately, since the means for creating excess pressure and vacuum are not combined. 25

The aim of the invention is to increase productivity.

For this, the installation is equipped with a sealing cap for valves with two fittings, one of which is 30

2

communicated with the cavity of the injection valves and the other with the cavity of the suction valves, a pressure source connected to the ejector, a pneumatic micrometer placed between the pressure source and the cavity of the pressure valves installed on the lid by a double acting pneumatic cylinder, the cavities of which are connected to the pressure source through the control valve. ’"

FIG. 1 shows the head of the fuel pump with valves in the collection, a longitudinal section; in fig. 2 is a schematic diagram of an installation for · leak testing of injection and suction valves.

The installation includes a housing 1 with means 2 for fastening the heads 3 of the tested fuel pumps complete with suction valves 4. and discharge valves 5. Sealing means in the form of a cam clip 6 with a seal 7. designed for sealing the discharge cavity of the discharge valves ;. The upper part of the head 3 is closed by a rubber sealing flap 8 with two fittings 9 and 10, one of which is connected to the cavity of the injection valve •, akamo ^ ^ 1 "^ ··:

759881

Panov, and the other - with a cavity suction valves. The fittings are equipped with 'connecting devices "11 and 12, made in a well-known way. To create a reliable hermetic connection between the upper part of the head 3 and the sealing cap 8, there is an air-cylinder 13 of two-way operation.

For supplying compressed air into the cavity of the injection valves, the installation has a pressure source (not shown), a through passage valve 14, an oil separator 15, a control valve 16, a through regulator. control valve 17, pressure gauge 18 and pneumatic micrometer! 9.

(0

15

For the message of vacuuming the cavity of the suction valves, the installation contains an ejector 20, a through valve 21 and a vacuum meter 22. These parts are interconnected by means of pipelines 23.

The installation works as follows.

Compressed air from a pressure source enters through

valve 14, filter-moisture-wiper 15, open control valve 16, valve 17 is adjustable, valve 17, pressure gauge 18 and micrometer

19 into the cavity of the discharge valves. five . At the same time, the compressed air through the pipeline from the control valve 16 enters the above-piston cavity of the pneumatic cylinder 13 of two-sided operation, which ensures reliable clamping of the sealing cover 8 to the upper part of the head 3. · '',

When the pressure valves 5 are in serviceable condition, the compressed air does not pass through the latter and squeezes the water column out of the glass tube of the pneumatic micrometer 19. If the pressure valves are not working, the level of the water column in the glass tube of the pneumatic micrometer 19

• lowered by the value determined by the intensity of the transmission of compressed air through the injection valves.

When the crane is open, 16

Control, the compressed air enters the ejector 20, so that in the “pipeline that connects the ejector

20 with full-vacuum suction valves 4 through a through-passage valve · 21, creates 20

25

thirty

35

40

45

50

55

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vacuum pressure, which is monitored / vacuum gauge 22. ¹

When the suction valve 4 is in good condition (to check them, the valve 21 is closed), the vacuum meter shows a stable amount of vacuum. In case of failure of the suction valves, the needle of the vacuum gauge drops to 0. ’

Thus, the verification of the serviceability of the injection and suction valves is practically carried out simultaneously, which significantly increases labor productivity.

When the control valve 16 is set to the position shown in FIG. 2 dotted, compressed, the air enters the sub-piston cavity. Pneumatic cylinder Ϊ3 of double-sided action, due to which the sealing kriyak 8 moves away from the upper part of the head 3, releasing the last for its removal from the installation.

Claims (1)

Claim Installation for testing the tightness of injection gas suction valves of gasoline engine pumps, comprising a housing with means for fastening and sealing the tested valves, a vacuum source made in the form of an ejector, the cavity of which is connected to the cavity of the suction valves, connecting pipelines with controlled valves and a vacuum gauge different the fact that, in order to improve performance, it is equipped with a sealing cap for valves with two unions, one of the ketorades communicates with the cavity of the injection valves and the other with the cavity of the suction valves, a pressure source connected to the ejector, a pneumatic micrometer placed between the pressure source and the cavity of the discharge valves mounted on the lid by a double-acting pneumatic cylinder, the cavities of which are connected to the pressure source through a valve. management. -