SU723530A1 - Pressure regulator - Google Patents

Description

I

The invention relates to the automation of production processes for automatic pressure and flow control of perekaddvaemyh media and can be used in the enterprises of oil and gas industry, as well as in other public enterprises.

A known regulator comprising a detachable housing with inlet and outlet pipelines, a diaphragm associated with a spring-loaded valve, and a seat made in the housing.

The lack of a regulator is a high degree of spring loading, which limits the possibility of creating such regulators of large sizes. The load pressure during operation will not be kept constant. As the flow rate increases and the pressure at the inlet to the regulator drops, it will decrease and the spring load will increase, which is a contradiction. Passing through the landing nest degrades the hydrodynamic properties of the regulator, and the design creates difficulties in adjusting it.

The circuit of the invention extends the adjustment range due to the high degree of spring unloading, which allows such a valve to fit any desired size.

The goal is achieved by the fact that the regulator housing is divided by two partitions and a membrane into an input, output control cavity, in the output and control cavities connected to each other through a valve, coaxially arranged relative to the stem are installed sealing sleeves, on one side fixed in partitions , on the other hundred (fixed on the rigid center of the membrane, the output cavity on the rigid center of the membrane is fitted with a reinforced ring.

III drawing shows a general view of the pressure regulator.

Claims (1)

The regulator sucks from the split housing I, valve stem 2, removable head 3, spring 4, membrane 5, sealing ring 6, upper partition 7, lower partition 8, two sealing sleeves 9, coaxially located relative to the stem 2, along the pipe; 10, the outflow pipe 11, the equalization pipe 12, the valve 13, the control valve, the pressure is set, for example, with the aid of the buffer tank 14, the valves J5, 16, 17. In addition, the membrane 5 of the valve, two hermetically sealed coupling 9 and two partitions 7, 8 form inside the regulator housing three independent cavities: the input A cavity, the high cavity B and the control cavity B. There is a saddle 18 in the case. The regulator has two static positions: fully open - when the pressure in cavities A, B, B is either completely absent, or equal to each other; fully enclosed - when the pressure in cavity A is equal to the pressure at the source, the pressure in cavity B is equal to pressure | x; quenching, and the pressure in cavity B is slightly higher than the regulation pressure. In the fully open position, the valve cores are in the extreme upper position, the valve head 3 is completely free. At the same time, the sealing ring 6 does not slightly come into contact with the protrusion of the upper part of the body, and the valves 13, 15, 16 are closed. With the regulator fully closed, the valve stem is in its lowest position, the valve head 3 closes the seat, and the valves 13, 15, 16 are closed. The basis of the regulator is based on the use of the change in pressure PI to the valve, while the parameter that gives impetus to the opening or closing of the valve is the pressure Pj. The change in the pressure of the pumped medium behind the valve determines the degree of consumption of the pumped product and causes the valve to react, opening or closing it. During operation, the valve stem perceives the pressure of the pressure in and out of the regulator and its output, taking into account the degree of opening of the valve. The shape of the valve head, which is a removable element, reflects all the hydraulic losses in the pipeline system up to the regulator, calculates it individually for each case and provides at any time a dynamic balance of forces acting on the regulator elements. V Operation of the regulator performed as follows. When the pressure Pj decreases, which will meet the requirement of an increase in the flow rate, the membrane 5, perceiving this kneading, allows the crank valve to move upwards, thus increasing the flow rate and lowering the pressure G ,. A decrease in pressure P ,, perceived by the valve stem, in turn, will cause the valve to open further until the pump is restored} and Pj at a higher flow rate. On this occasion, all forces acting on the elements of the regulator must be completely balanced. With an increase in pressure Pj, which will meet the requirement of reducing the flow rate, the membrane 5, perceiving this change, will move the design of the regulator downward, thereby reducing the flow rate and increasing the pressure P |. An increase in the value of Pj, perceived by the stem 2 clap, will cause c. turn further closing the valve until pressure PJ is fully restored at a lower flow rate. At this point, all the forces acting on the valve elements must be fully balanced. With a fully open control valve, when the valve head ceases to perform its throttling functions, the pressure at the inlet to the regulator is equal to the pressure Pj, and the flow becomes maximum possible. Starting the controller into operation requires preliminary preparation, which is the following. Ballast liquid is poured into buffer 1 to tank 14 up to design mark, and then gas (compressed air) is injected into cavity B through valve 15 with valve 13 closed, with pressure ensuring that the sealing ring 6 is pressed tightly against the protrusion of the upper part of housing B. Then valve 13 opens and in cavity B and B, with a fully unloaded membrane, pressure PJ is created. Then the valves 13, 15 are closed and the regulator is ready for operation) After the working pressure is reached in the main pipeline, the regulator is turned over the entire flow range and, if necessary, additional regulation is performed by changing the volume of the ballast fluid in the buffer tank 14, provided that the pressure in the cavity B of the open regulator is equal to the pressure Pj. The regulator is designed to operate on clean liquids or gases and does not require any extraneous sources of hydrogen. Such a regulator on main pipelines will allow the automation of the pipeline operation, while ensuring smooth flow control. Claims of Invention A pressure regulator comprising a split housing with inlet and outlet piping, a diaphragm associated with. a spring-loaded valve, a saddle embedded in the body, characterized in that, in order to expand the adjustment range, the body of the regulator is divided by two partings and a membrane into the input, output and control cavities, into the output and control cavities interconnected through valve, coaxially mounted 23530fr with respect to the stem, the sealing sleeves mounted on one side fixed in partitions, are installed. on the other hand, fixed on the rigid center of the membrane, in the exit cavity on the rigid center a sealing ring is installed.