RU2331022C1 - Gas valve - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention refers to power engineering, particularly to gas valves, used in devices for burning of a gaseous fuel and it can be implemented in gas burning devices of steam and hot water boilers. The gas valve consists of a case with a control and regulating unit, an upper reservoir, a diaphragm, a membrane with two position gate, a drainage nozzle and a pressure source nozzle, a membrane with a rigid center and a valve saddle, a channel with a jet, a gas line; at that a burner is connected with the gas line by means of a tap, while by means of impulse pipes the case of the gas valve is connected with a furnace, draught, flame and temperature sensors, a thermo regulator with a sensor, an igniter with a thermo bimetallic plate and a start button. The gas valve is additionally equipped with a main gas sensor; at that the latter and a flame sensor nozzle are arranged successively above the thermo bimetallic plate of the igniter and designed to open the main gas sensor by means of the start button; while the control and regulating unit is connected with main gas sensor by means of the impulse pipe.

EFFECT: upgrading the reliability of a gas burner with simplification of its design and providing an improved system of a gas supply control.

1 dwg

Description

FIELD OF THE INVENTION

The invention relates to energy, in particular to gas valves used in devices for burning gaseous fuels, and can be used in gas burner devices of steam and hot water boilers.

State of the art

Known nozzle assembly of the burner, comprising a housing with a guide plate mounted outside it and bent at a predetermined angle relative to its plane towards the flow end, while the plate from the side opposite the bent end is provided with a pivot axis perpendicular to the longitudinal axis of the housing and its end bent at an angle 10-15 ° (see AS of the USSR No. 989244, class F23D 13/26).

The disadvantage of this nozzle unit of the burner is the insufficient mixing of gas with primary air and the quality of combustion.

Known atmospheric gas burner containing a gas regulator, consisting of a control unit connected to a temperature sensor using a control channel, a control unit connected to flame sensors, traction sensors a control channel, while it is equipped with a second gas regulator consisting of a control unit connected with temperature and outdoor air sensors, a control unit, while the second gas regulator is installed with the possibility of parallel connection of the cavities of the control units and the tempera sensor Aturi outside air by connecting the unit to regulate the second gas regulator, wherein the percentage of gas supply to the burner controls both valves installed (see. US Pat. RF №2196939, cl. F23N 1/10, F23D 14/60).

The disadvantage of this burner is its low power due to the use of gas regulators with a throughput of 12 m ³ / hour each (gas regulators with a higher capacity are not manufactured by the industry). The second disadvantage of this burner is the lack of an electrical signal to turn on and off the burner, depending on the operation of the circulation pumps of the smoke exhaust motors and other electrical units of the heating system.

The closest in technical essence and the achieved positive effect and adopted by the author for the prototype is a gas valve, consisting of a housing with a control and regulation unit, an upper cavity, a diaphragm, a membrane with a two-position shutter, a drainage nozzle, a pressure source nozzle, a membrane with a rigid center and a seat valve, a channel with a nozzle and connected to the gas pipeline, moreover, a burner is connected to the gas pipeline by means of a crane, and a furnace, a sensor is connected to the gas valve housing by means of impulse tubes and traction, flame and temperature, a temperature regulator with a sensor, an igniter with a thermobimetal plate and a start button. (see. Two-stage atmospheric gas burner. RGU-M1 operating manual (Ca 2.574.023.RE OJSC Starorusspribor Plant, 175200 Staraya Russa, Novgorod Region, Mineralnaya St., 24).

The disadvantage of this gas valve is the design complexity, low reliability and lack of self-monitoring of the presence of flame with the supply of network gas to the controlled thermostat of the main burner.

Disclosure of invention

The technical result that can be achieved using the present invention is to self-control the presence of flame, simplifying the design, improving the reliability of the burner and performing the additional function of turning on the gas supply by the signal of the temperature and traction sensors.

The technical result is achieved using a gas valve connected to a gas pipeline and consisting of a housing with a control and regulation unit, an upper cavity, a diaphragm, a membrane with a two-position shutter, a drainage nozzle, a pressure source nozzle, a membrane with a rigid center and a valve seat, a channel with a nozzle, moreover, a burner is connected to the gas pipeline through a tap, and a furnace, draft, flame and temperature sensors, a temperature regulator with a sensor, an igniter with a mobimetallic plate and a start button, while it is additionally equipped with a network gas sensor, the last and a flame sensor nozzle placed sequentially above the thermo-bimetallic igniter plate with the possibility of opening the network gas sensor using the start button, and the gas valve control and regulation unit is connected via a pulse tube to network gas sensor.

Brief Description of the Drawings

The drawing shows a gas valve, a General view.

The implementation of the invention

The gas valve is connected to the gas pipeline (not indicated in the drawing) and consists of a housing 1 with a control and regulation unit 2, an upper cavity 3 with a diaphragm 4, a membrane 5 with a two-position shutter, a drainage nozzle 6, a nozzle 7 of a pressure source, and a membrane 8 with a rigid center , seats of the valve 9, channel 10 with the nozzle 11, while the burner 13 is connected to the gas line through the valve 12, and the furnace 14, the thrust sensor 15, the temperature regulator 16 with the sensor 17, the igniter 18 with the thermo-bimetal plate 19 are connected above installed sensor 20 network about gas, the flame sensor 21, the start button 22, while the network gas sensor 20 and the flame sensor nozzle 21 are arranged sequentially above the thermobimetal plate 19 of the igniter 18 with the possibility of opening the network gas sensor 20 using the start button 22, and the gas monitoring and control unit 2 the valve is connected by means of a pulse tube 23 to the network gas sensor 20, and thrust sensors 15, temperature 17, flame 21, network gas 20 are connected to the gas valve by the pulse tubes 23.

The gas valve operates as follows.

By pressing the start button 22, the valve of the network gas sensor 20 is lifted, gas is supplied through the pulse tubes 23 to the igniter 18 and to the gas valve body 1. The ignitor 18 is ignited, the button 22 is held until the thermo-bimetallic plate 19 is heated, then the button 22 is released, gas will continue to flow to the igniter 18 and into the housing 1. The valve of the flame sensor 21 is closed, and if the nozzle of the temperature sensor 17 of the temperature controller 16 is also closed and closed if the nozzle of the draft sensor 15 is installed in the furnace 14, then pressure arises in the upper cavity 3 due to gas entering through the channel 10 and the nozzle 11, under the influence of this pressure, the membrane 4 will move the on-off damper 5 of the drainage nozzle 6 to the nozzle 7 of the pressure source, from the cavity above the membrane 8 with a rigid center will move away from the valve seat 9, then open the valve 12, the burner 13 is turned on.

When the draft disappears, the nozzle of the draft sensor 15 opens, the gas pressure in the upper cavity 3 decreases abruptly, the on-off damper 5 moves from the nozzle 7 of the pressure source to the drainage nozzle 6 into the cavity above the membrane 8 with a rigid center, gas flows from the nozzle 7 of the pressure source, membrane 8 with a rigid center it lowers onto the valve seat 9, the burner 13 goes out, the same thing happens when the temperature of the coolant rises above the setting point of the temperature controller 16 due to the opening of the nozzle of the temperature sensor 17. When cooling the coolant, the nozzle of the temperature sensor 17 closes and the gas valve automatically opens and turns on the burner 13. When the draft is restored, due to the opening of the nozzle of the draft sensor 15, the gas valve automatically opens and turns on the burner 13. When the flame of the igniter 18 goes out, the nozzle of the flame sensor 21 opens and at the same time the nozzle of the network gas sensor 20 closes. The pressure in the upper cavity 3 decreases stepwise, the on-off valve 5 moves from the nozzle 7 of the pressure source to the drainage nozzle 6, pressure arises above the membrane 8 with a rigid center, under which the membrane 8 with a rigid center drops onto the valve seat 9, stopping the gas supply to the burner 13 which goes out, the gas supply to the channel 10 and the nozzle 11 is simultaneously stopped, in this case, having eliminated the cause of the extinguishing of the igniter 18, it is necessary to close the valve 12 and manually burn the burner 13 as described above.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- the function of self-control;

- automatic temperature control of the coolant;

- simplification of the design;

- increase in reliability and power;

- the presence of an electrical signal to turn on - off the gas valve;

- the accuracy of the proportioning of gas and air flow when changing the power of the burner.

Claims (1)

A gas valve, consisting of a body with a control and regulation unit, an upper cavity, a diaphragm, a membrane with a two-position shutter, a drainage nozzle, a pressure source nozzle, a membrane with a rigid center and a valve seat, a channel with a nozzle connected to the gas pipeline, and to the gas pipeline through a valve the burner is connected, and the furnace, draft, flame and temperature sensors, a temperature regulator with a sensor, an igniter with a thermo-bimetallic plate and a start button are connected to the gas valve body using pulse tubes characterized in that it is additionally equipped with a network gas sensor, while the latter and the flame sensor nozzle are arranged sequentially above the thermo-bimetallic igniter plate with the possibility of opening the network gas sensor using the start button, and the gas valve control and regulation unit is connected via a pulse tube to the network gas sensor .