Regulator of gas pressure

FIELD: engineering industry; regulator engineering.

SUBSTANCE: regulator of gas pressure contains valve located on a rod, saddle, central hole, feeler connected by means of lever transmission with a rod. In the valve and in rod channel for a gas supply in a compensating cavity is executed. This cavity is organised by protective and compensating membranes. Regulator has located in a peripheral edge part of the valve the channel for an inlet (input) of gas. Central face part of the valve from periphery has an overlapping element, forming under itself a cavity for a gas course.

EFFECT: productivity gain of the device due to rising of its throughput.

3 cl, 1 dwg

 

The invention relates to a technique of automatic control and can be used for gas boilers and other industrial and municipal facilities.

Known gas pressure regulators (patent RU 2035058, 2062505 and 2010302). They are all characterized by the presence of the compensation chambers or cavities that are needed to balance the forces of gas pressure on the control valve.

The gas pressure regulator (patent RU №2035058) has a housing with an input cavity, which is connected via saddle shut-off and control valves with an intermediate cavity which is connected with the output cavity and separated by a partition from the control cavity, the sensing element in the form of a membrane with a rigid center, fixed in the housing between the management and defining cavities. The membrane is loaded by a spring located in defining the cavity and is connected with the body configuration. The hard center of the membrane is connected through the lever with the rod control valve. The difference of this gas pressure regulator is the presence of a compensation element in the form of bellows. Its ends attached to the bases of the discharge chamber. The upper base of this chamber is connected with a regulating valve or stem, and the bottom base is connected with the protective sensor element made in the form of an annular membrane attached on the external and internal to the tours to the bottom base of the discharge chamber and the shaft of the control valve. Between the lower base of the discharge chamber and the partition wall has a gap, and the intermediate cavity is connected with the cavity of the discharge chamber through the axial passage in the control valve.

The gas pressure regulator in the patent RU No. 2062505 has basically the same elements and components as the above-mentioned device. The essence of this invention lies in the fact that it introduced protective membrane, forming with the body podobrannyy cavity communicated with the output cavity. The purpose of this solution is improving the accuracy of stabilization of output pressure when changing the input by compensating effort on the stock.

However, the performance of these controllers is reduced due to the under utilization of the capabilities of the saddle, since the latter is not fully used, because the pressure compensation cavity, more pressure on the valve.

The closest analogue of the claimed invention is the gas pressure regulator (patent RU №2010302). A distinctive element of this control is a protective membrane, which is made in the form of a bellows. In the optimal case, the geometry of the protective membrane subject to the relation that binds the ratio of the elements of the regulator: the seat area Sc and space compensation S and protective S membranes

Sc=S-S.

However, and this is what the regulator has the same drawback - low productivity.

The objective of the proposed solutions is to increase the productivity of the gas pressure regulator.

The essence of this invention lies in the fact that the gas pressure regulator containing a valve, located on the stem, and the valve and rod made the channel for supplying a gas to the compensation cavity, which is formed protective and compensatory membranes, the saddle, the Central hole, the sensing element is connected through linkage with the rod, there is located in the peripheral edge part of the valve inlet channel (input) gas, and the Central end portion of the valve from the periphery has an element of overlap, forming a cavity to move the gas.

Moreover, there is a gas pressure regulator with all the characteristics listed above, in which the element overlap is located directly on the outer surface of the valve and is extended from the area of the edge part not overlapping in her hole, to the Central part, overlapping the Central hole.

Applying the gas pressure regulator, in which an element of overlap is made in the form of a mushroom body in the form of the upper radial portion and a hollow legs, in which is formed a channel for the supply of gas in the compensation cavity.

The inventive gas pressure regulator with the costs of housing 1 with an inlet 2 and outlet 3 cavities between which is located the saddle 4. At the side of the housing 1, the regulator has a second housing 5 with the sensor element 6 with tuning spring 7, with the rod 8 of the sensing element 6, which through linkage 9 is connected to the stem 10 of the valve 11. On the stem 10 of the valve 11 fixed compensation 12 and 13 protective membrane. The latter forms a compensatory cavity 14 that is connected to the input cavity 2 of the regulator. On the stem 10 of the valve 11 is located and fixed element of overlap, for example, in the form of a tube 15 having a radial channel 16 connecting the input cavity 2 through the channel 16 of the rod 10 with the compensation cavity 14. The best form of item overlap 15 has the configuration mushroom round body.

Operation of the proposed gas pressure regulator.

1. The position of the regulator in the absence of gas flow. In this case, the pressure force on the valve 11 is equal to the product of the input pressure to the square of the valve 11. The force developed by the compensation cavity 14, is equal to the product of the magnitude of the input pressure difference of squares 13 protective and compensatory membrane 14 or the seat area of the valve 11. Force, pressing the valve is balanced by the force developed by the compensation cavity 14.

2. The position of the slider in the mode of gas flow. The gas flows through the housing 1, the seat 4 and the valve 11 and through radial ka the al element overlapping 15 in the axial channel and then through the channel 16 of the rod 10 enters the compensation cavity 14, formed compensation 12 and 13 protective membranes. Dynamic balancing valve 11 to the compensation cavity 14 are best implemented in the inventive controller at performance ratio

DEP=0,8-0,95Dwith,

where DEPthe diameter of element overlap

Dcthe diameter of the seat.

Due to the fact that the total pressure of the gas is equal to Rstat.+Pdynaminer=const, when the movement of gas through the saddle part of the total pressure is converted to dynamic pressure. In this case, the static pressure Pstat.the valve 11 is reduced. At the same time in the compensation chamber 14, the pressure remains constant (see above ratio Rstat.+Pdynaminer). Item overlap 15 serves for selection of the static pressure Pstat.so that the pressure force on the valve 11 was equal to the force developed by the compensation cavity 14.

Feasibility the proposed gas pressure regulator is to improve the device performance by increasing throughput. The advantage of the device is that it allows you to get full travel of the valve 11 at any pressure, providing bandwidth of the regulator with the capacity to seat that gives the maximum performance of the controller in question is the size of the saddle. For example, for comparison, in the design of gas pressure regulator, similar to the design described in the patent RU No. 2010302 author Frolov NM with a bandwidth of 120 m3per hour, claimed in this invention the gas pressure regulator has a capacity of 300 m3/h (at the same inlet pressure 0.1 MPa).

1. The gas pressure regulator containing a valve located on the rod, which holds the channel for supplying a gas in the compensation cavity formed protective and compensatory membranes, the saddle, the Central hole, the sensing element is connected through linkage with the rod, characterized in that it is located in a peripheral edge part of the valve inlet channel (input) gas, and the Central end portion of the valve from the periphery has an element of overlap, forming a cavity to move the gas.

2. The gas pressure regulator according to claim 1, characterized in that the element overlap is located directly on the outer surface of the valve and is extended from the area of the edge part not overlapping in her hole, to the Central part, overlapping the Central hole.

3. The gas pressure regulator according to claim 1, characterized in that the element overlap is made in the form of a mushroom body in the form of the upper radial portion and a hollow legs, which form the Rowan channel for supplying a gas in the compensation cavity.



 

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EFFECT: enhanced reliability.

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EFFECT: improved reliability of process, simplified design, improved manufacturability and assembly of valve mechanism.

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FIELD: valving.

SUBSTANCE: pulse-safety device comprises the main safety valve. The above-piston space of the valve is in communication with the inlet branch pipe and inlet and discharge branch pipes of the pulse valve. The pulse valve is provided with the spring-loaded slide, indicating piston, and bushing. The device is provided with the adjusting valve. The adjusting valve is connected with the pulse valve and is composed of the slide provided with three branch pipes and controlled by the fluid. One of the branch pipes is connected with the system to be protected. The second branch pipe is connected with the inlet of the pulse valve through the throttle and space between the slide and bushing. The throttle is defined between the outer surface of the indicating piston and inner surface of the bushing. The third branch pipe is connected with the external pressure source. The pulse valve is provided with the electromagnet and stabilizer of the slide position. The pulse valve is adjusted by adjusting valve from the external pressure source without enhancement of the pressure in the system to be protected and without disconnection of the device from the system to be protected.

EFFECT: enhanced reliability.

2 dwg

Pulse-safety device // 2272206

FIELD: valving.

SUBSTANCE: pulse-safety device comprises the main safety valve. The above-piston space of the valve is in communication with the inlet branch pipe and inlet and discharge branch pipes of the pulse valve. The pulse valve is provided with the spring-loaded slide, indicating piston, and bushing. The device is provided with the adjusting valve. The adjusting valve is connected with the pulse valve and is composed of the slide provided with three branch pipes and controlled by the fluid. One of the branch pipes is connected with the system to be protected. The second branch pipe is connected with the inlet of the pulse valve through the throttle and space between the slide and bushing. The throttle is defined between the outer surface of the indicating piston and inner surface of the bushing. The third branch pipe is connected with the external pressure source. The pulse valve is provided with the electromagnet and stabilizer of the slide position. The pulse valve is adjusted by adjusting valve from the external pressure source without enhancement of the pressure in the system to be protected and without disconnection of the device from the system to be protected.

EFFECT: enhanced reliability.

2 dwg

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