SU585362A1 - Device for determining fluid-tightness parameters of valve-seat couple - Google Patents

Description

(54) DEVICE FOR DETERMINING PARAMETERS OF SEALING VAPAN SADDLE VAPORS

The invention relates to measuring instruments RU1Ya research parameters of pneumatic fittings. A device is known for determining the parameters of sealing the valve-pair of pairs containing a saddle with an elastic jumper and a valve with an elastic sealant, a unit for adjusting and measuring the sealing force, a valve displacement indicator and a device for measuring gas leaks .lj. A disadvantage of the known device is a significant measurement error of the deformation of the sealer conducted without pressure of the working medium and the moment of contact between the valve-saddle pair. It is also known a valve device containing a recording and measuring apparatus, a valve-contact contact unit, which is in the form of an electrical contact microswitch, 2 The disadvantage of such a device is the low accuracy of determining the moment of contact of a pair of valve-; and the accuracy of the determination of all parameters of the remixing. The purpose of the invention is to show measurement accuracy; sealing parameters. This is achieved by the fact that the electrical contact located on the valve is also made in the form of a film of conductive material applied to it. The drawing shows the proposed device. The device consists of a housing 1, inside of which is a valve 2 with an elastic seal 3 and a saddle 4 with an elastic jumper 5. The required force to press the valve to the saddle is created by an adjusting screw 6 and a spring 7 through stops 8 and 9, the movement of the valve 2 is monitored by a micron indicator Yu through the rod 11, which is in constant contact with the valve due to the spring 12. The sealing force of the valve-seat pair is measured by the sensors 13 pasted on the utral jumper 5 of the saddle 4. A film 14 of current is applied to the end of the valve 2 with an elastic seal 3 rovod conductive material providing mopekul molar adhesion to the seal material. The optimum film thickness is established depending on the film material and the exclusion of its influence on the physicomechanical properties of the elastic yiuiOT filament.

The surface of the valve is electrically insulated with sleeve 15, points 16 and 17.

Sensors 13 and coating 14 are connected. to measuring equipment, such as a strain gauge.

The device works as follows;

Gas is injected at the inlet. The regulator is loaded with a spring screw 6. by 7, which moves the valve 2 to the saddle 4, the Moment of Contact with the saddle is fixed on the strain gauge by a corresponding sign. Thereafter, the indicator 10 is set to zero. The magnitude of the leakage and the seal- ing force of the valve-pair are discretely determined, depending on the amount of deformation of the elastic seal. The amount of deformation of the elastic seal is recorded by a micron indicator 10, the true value of the sealing force of the pair is measured by sensors 13, the amount of leakage is determined by appropriate means, for example, a rotameter.

The determination of the sealing parameters is carried out until the complete sealing of the CK and the valve-seat pair is obtained.

The proposed device allows you to measure sealing parameters with sufficient accuracy and determine their dependencies.

in pairs of valve-seat of various designs and with different materials of elastic seal. Knowledge of the sealing parameters, as well as the dependencies of the gas leakage and the sealing force on the deformation of the elastic seal, will allow you to determine the pressure in the exit cavity, as well as the ratio of forces on the moving parts of the gas valve at the time of the complete sealing of the valve-seat pair.

four

formula of invention

Three for determining the parameters of sealing the valve-saddle valve, mainly for saddles with an elastic jumper and valves with an elastic seal, with recording and measuring equipment, the contact recording unit of which is filled in the form of electrical contacts located on the saddle and valve, characterized in that In order to improve the accuracy of the measurement of the sealing parameters, the electrical contact is located on the valve in the form of a film of conductive material applied to it.

Sources of information taken into account in the examination:

1. Armature construction, Collection of scientific TpytfeB, L., CKBA, vol. 4, 1973, pp.65-73

2. USSR author's certificate No. 357405, kp, F 16 K 37 / OO, 197 O K measpcmaHnufi To rotameter