SU987595A1 - Pressure regulator - Google Patents

Description

(54) PRESSURE REGULATOR

one

The image relates to pneumatic automation and can be used in gas supply systems.

A device for regulating pressure is known, comprising a housing with a valve-seat regulating body installed therein, connected by a pusher with a sensitive element, the pusher being installed with eccentricity about the axis of the saddle 1 3

The disadvantage of this device is the low accuracy of maintaining the outlet pressure at high gas flow rates.

The closest in technical essence to the present invention is a pressure reducer containing inlet and outlet channels, a self-adjusting throttling valve, kinematically connected with a sensitive element and a spring of reference.

The self-locking bolt consists of a guide and a plate, providing a choice of skew. The throttling cable is a pair of valve-saddle made of

metal with high purity sealing surfaces. Mutual non-parallelism of the end faces of the saddle and the stem is selected by the landing gaps, since the non-parallelness is within the range of O-0.5 mm 2.

Claims (2)

The disadvantage of the known reducer is pressure pulsation Pn at low gas flow rates within the maximum tolerance Pai ivf This is explained by the fact that at low gas flow rates, the throttling gap is small (compared to the gap at the maximum gas flow rate) and friction in moving parts and sealing forces there is an overshoot, i.e., a variation in the size of the throttling gap around the required nominal value at a given small gas flow, and consequently, pressure fluctuations ity gear at low gas flow. The goal of iaofoteni is to increase the accuracy and stability of the controller at low flow rates. This goal is achieved in the pressure regulator, which contains a housing with inlet and outlet channels, in which a shut-off element is installed in the form of a self-adjusting shutter with a plate, connected to the sensor with a sensitive element, and a spring set, sealing the surface of the shut-off valve saddle under angle of 2 - 3 to the end surface of the rod within the self-installation of the shutter. Such a solution allows, when operating the controller with a low gas flow, the sealing force is partially removed, not completely, as in the prototype, and the shutter stroke is increased at the same force 4 acting on the shutter, at the expense of increasing the shoulder with the application of force. FIG. 1 schematically shows the proposed controller when operating with the maximum gas flow rate; in fig. 2The valve position at MianoM is the flow rate per ha. The pressure regulator consists of body 1 with inlet 2 and output 3 channels, a locking member consisting of a seat 4, a self-adjusting valve 5 and a guide 6 with spring 7, stem 8, a sensing element 9, the spring 10 of the task, the adjusting screw 11, the stop 12, the feedback channel 13. The sealing surface of the seat 4 and the locking organ is made at an angle of 2–3 ° to the end surface of the rod 8 within the self-alignment of the bolt. The pressure regulator works in the following way. The gas from the power source enters Inlet Channel 2. When the spring is unloaded, the O-1 task is self-adjusting-. The shutter consisting of the plate 5 and the guide 6 is pressed against the saddle 4, with the input channel 2 and the output channel 3 being sealed. When the spring 1O sets the load with the adjusting screw 11, its force is transmitted to the plate 5 through the sensing element 9. The latter is pressed out of the seat 4 and the gas through the formation of the gap enters the output of the NO channel 3. From the output channel 3 through the feedback channel 13 the gas enters the sensing element 9. When there is an equilibrium between pressure and springs, acting on the bolt (plate 5) and the sensing element, a certain pressure is established at the regulator output. As the gas extraction from the regulator increases, the pressure in the outlet channel 3 drops, and as a result, the plate 5 is depressed from the saddle 4, the gas flow rate through the saddle increases and the outlet pressure rises to the initial setting pressure. Due to the fact that the sealing of the BipixHOCTb seat has a slope to the end surface of the stem within 2-3, the slide plate moves away from the saddle not parallel, as in the prototype, but at an angle (Fig. 2), which allows to increase the shutter stroke with the same force acting on the bolt, and the sealing force to remove partially due to the emphasis of the slide plate on the edge of the saddle. As a result, the regulator’s inactivity zone is eliminated. The slope of the sealing surface of the seat relative to the end surface of the stem, made within 2-3 °, completely eliminates the fluctuation of the output pressure, which is within 0.2 kgf / cm (50% of the permissible deviation of the maximum gas flow) at a frequency of up to 1 Hz . Thus, the accuracy of maintaining the pressure of Gw1,1. P scrap consumption increased by 100%, pressure fluctuations were excluded. The invention The pressure regulator, comprising a housing with inlet and outlet channels, in which a shut-off member is installed in the form of a self-adjusting slide with a plate connected by a rod with a sensitive element, and a spring set up, characterized in that, in order to improve accuracy and stability at small , the flow rate of the medium, the sealing surface of the seat of the locking member is made at an angle of 2-3 ° to the end surface of the stem within the self-assembly of the bolt. Sources of information taken into account in the examination 1- Author's design etelstvo USSR 596,742, kl.R 15 C 3/04, 1976. 2. USSR author's certificate No. 368442, cl. “Part 05 D 16/10, 1971 (prototype).