SU714365A1 - Pressure regulator - Google Patents

Description

(54) PRESSURE REGULATOR

one

The invention relates to the field of automation, in particular, to reducing valves, to regulators designed to reduce the high pressure of water entering various hydraulic systems, for example, fire and irrigation pipelines, and can be widely used in the coal, mining and other industries. .

Devices are known for reducing the pressure in fire and irrigation networks of deep mines due to the installation of reduction units on the horizons, the width of which consists of reduction valves 1.

However, to ensure water supply to deep shafts, the number of pressure reduction steps must be chosen so that the pressure at the inlet to each reduction unit does not exceed 30-40 kgf / cm 2, since reliably operating pressure reducing valves for pressures exceeding this value are missing. Frequent installation of reducing units is economically unprofitable and unreliable.

A more promising direction is the use of pressure reducing valves in deep shafts intended for high pressure drops. The use of KP-2 pressure reducing valves for these purposes is inexpedient, and in some cases impossible, because when these valves operate at pressure drops of more than 30 kgf / cm, they experience cavitation, accompanied by strong vibration and noise, and resulting to the rapid deterioration and destruction of valve components.

Known regulating valves with multi-stage throttling plungers, designed to operate at high pressure drops 2.

However, these valves have an unbalanced plunger, low throughput and the inability of the peryj / H to control the number of throttling stages without changing the design.

The closest in technical essence to the proposed is a pressure regulator, comprising a housing with inlet and outlet nozzles, divided by partitions into chambers, a control element located in the case and connected to a regulating body, made in the form of a glass with transverse partitions, installed in a sleeve rigidly fixed in the body, the inner cavities of the glass being connected by throttling holes made in the glass and the sleeve with the corresponding chambers of the body 3. However, the known structures The instructions do not allow the valve resistance to be reduced without creating a typical valve range designed for operation in various conditions (by inlet pressure).

The purpose of the invention is to expand the range of application of the pressure regulator.

This is achieved by the fact that in the regulator in the transverse partitions of the glass holes are made in which removable caps are installed.

The drawing shows a general view of the pressure regulator.

The regulator includes a housing 1 with an inlet 2 and an outlet 3 with nozzles, a sleeve 4 fixed in the housing with one or several rows of throttling holes 5. The sleeve 6 houses a sleeve 6, which can have inside one or several partitions 7 with removable plugs 8 on them and with a plug 9 at the plunger end on the low pressure chamber side. On the other hand, the plunger is fixed on the control element - the membrane 10, which, in turn, is clamped on the periphery between the housing 1 and the cover 11 of the diaphragm-spring drive. The plunger 6 may have two or more rows of throttling windows located opposite the corresponding bushing windows. To the cover 11 of the membrane-spring drive there is a rigidly attached glass with grooves, in which the crossheads 12-14 are placed, having the ability to move freely along the grooves. Between the cross-arms 12 and 14, the thrust rings 15 and 16c covering the cup are arranged with a spring 17 between them. In the threaded bore of the yoke 13, an adjusting screw 18 is placed, the free yoke 14 passes freely through the through hole and abuts against the last shoulder. The housing 1 has partitions 19-21, which form airtight chambers 22-24 between the housing and the sleeve. The low pressure chamber is connected to submembrane chamber 22 by means of a nozzle 25.

Works regulator as follows.

The high-pressure fluid enters the inlet 2 of the housing and the high-pressure chamber 23. Then, when passing through the first row of throttling holes, the flow of the liquid narrows, and when it enters the first inner chamber of the cup 6, it expands, and the flow energy is lost. When leaving the chamber of the glass into the chamber 24 and further from the chamber 24 into

The second chamber of the cup repeats the process of contraction and expansion of the fluid flow, accompanied by energy loss. The number of throttling stages must be such as to ensure the required flow rate and maximum pressure at the outlet of the regulator. The pressure changes at the outlet of the regulator and, therefore, in the low pressure chamber through the nozzle 25 are transferred to the submembrane chamber 22 and affect the effective area of the membrane 10. The glass 6 is held in the lower position due to the spring 17. The magnitude of the force acting on the shank of the glass can change with the adjusting screw 18. The force is transmitted successively through the yoke 13, the screw 18, the yoke 14, the thrust ring 16, the spring 17, the thrust ring 15 and the yoke 12. With an increase in pressure at the regulator outlet, it rises yes the pressure in the chamber and, therefore, in the submembrane chamber 22. The pressure acting on the effective area of the membrane causes a force acting on the cup and a direction against the force transmitted to the shank from the spring. When the output pressure of a certain size is exceeded, the spring 17 is adjusted to, the cup 6 automatically moves upwards, thereby reducing the flow area of the throttling holes, causing a reduction in the flow rate of the fluid passing through the regulator. A further increase in outlet pressure will further reduce the flow area of the throttling holes, and finally, in the complete absence of fluid withdrawal at the regulator outlet, the throttling holes will close completely and the fluid pressure at the outlet will not exceed the value set by the spring 17. With a small differential pressure there is no need for a large number of pressure reduction stages, since the losses may be such that even with fully open throttling openings (the glass is in the limit In the lower position) it will be impossible to provide the minimum required outlet pressure. The design of the regulator allows to obtain any number of throttling steps required in practice. For example, having unscrewed all the caps 8 and 9 from glass 6, we obtain one level of throttling, i.e. the fluid flow undergoes a single contraction and expansion when passing through one row of throttling holes. Sleeping in all the plugs 8 from the internal partitions of the glass, but leaving the plug 9 on the end of the glass, we get two steps of throttling. Leaving one plug 8 and sn in the rest (including plug 9 at the end of the glass), we have three stages of throttling, etc. Instead of a spring in a diaphragm actuator,

Claims (1)

Claim Pressure regulator comprising ¹⁰ cor- pus with the inlet and outlet, divided by partitions into chambers, the control element disposed in the housing and connected to the regulator, designed as a nozzle with transverse partitions mounted in the rigidly fixed in the housing sleeve, wherein vnut rennie the cavity of the glass are connected by throttling holes made in the glass and the sleeve, with the corresponding cameras of the housing, characterized in that, in order to expand the scope of the regulator, in it in transverse regorodkah nozzle openings, in which are installed the removable stub.