RU2550291C1 - Two-stage gas burner - Google Patents

Abstract

FIELD: power industry.

SUBSTANCE: two-stage gas burner consists of a gas valve of the second stage, which is connected to a control unit, the latter is connected to draft sensor, an electromagnetic valve, an operating temperature sensor, which includes a microswitch, with that, the gas valve of the second stage is connected to the main burner; with that, the two-stage gas burner also includes a gas valve of the first stage, which is connected to the control unit, and the latter is connected to a delivery gas sensor and a limit temperature sensor.

EFFECT: invention allows providing instantaneous (within 2-3 seconds) trip of a gas valve of the second stage and provides high reliability of supply of heat and hot water to consumers.

2 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of energy, in particular to a two-stage gas burners, and can be used in devices for burning gaseous fuels in gas burner devices of steam and hot water boilers.

State of the art

A well-known household gas stove burner containing a mixing pipe fixed to the stove table with a diffuser-mixer and a fire nozzle spring-loaded to the side of the table with a spring with the possibility of vertical movement, while bimetallic sensors are placed in the zone of the fire holes of the burner, the movable ends of which are in contact with the nozzle stops moreover, with an increase in gas consumption, the temperature of the sensors increases, which leads to the removal of the fire nozzle from the bottom of the heat exchanger, and with a decrease in gas consumption, the temperature Ikov falls, and the fire nozzle, under the action of a spring, approaches the bottom of the heat sink, as a result of this, the high-temperature zone of the burner flame is always at the bottom of the heat sink, and a valve with a spring-loaded shut-off element can be installed on the pipe in front of the diffuser, the rod of which is connected via a lever to the nozzle, while extinguishing the flame, boiling water in the container or removing it from the grate, the valve closes and the gas supply to the burner stops (see A.S. SU No. 1779881, IPC F23D 14/04, publ. 12/07/1992).

The disadvantage of this burner is the design complexity, low reliability during operation.

A pilot burner is known that contains a flame sensor installed in a housing with a bimetallic plate and a flame sensor including a normally open nozzle, impulse tubes, a gas control system, and a gas sensor with a normally closed valve and a normally closed valve is installed on the flame sensor housing above the bimetallic plate and the gas start lever, while the network gas sensor is connected via impulse tubes to the flame sensor housing, pipe, control system of the gas regulator of the main burner (see US Pat. No. 2319899, IPC F23N 5/04, dated July 21, 2006).

The disadvantage of this burner is the duration of the signal transmission to turn off the gas valves of the main burner.

The closest in technical essence and the achieved positive effect and adopted by the author for the prototype is an 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 a flame sensor, draft, control channel, however, it is equipped with a second gas regulator, consisting of a control unit connected to water temperature sensors and external air, a control unit, while the second gas the regulator is installed with the possibility of parallel connection of the cavities of the control units and the outdoor temperature sensor by connecting a second gas regulator to the control unit, and the percentage of gas supply to the burner by both regulators is set by taps (see Pat. RU No. 2196939, IPC F23N 1/00, F24D 14/60, published on January 20, 2003).

The disadvantages of this burner are the duration of the signal for shutting off the gas valves of the main burner, as well as the high consumption of gaseous fuel, low reliability.

Disclosure of invention

The objective of the invention is to develop a two-stage gas burner for gas burner devices with instant, within 2-3 seconds, turning off the gas valve of the second stage when the voltage disappears in the mains and maintaining the electrical independence of the first stage with a capacity of up to 100 kW, which will allow to maintain the electric power of this stage and provide consumers of heat and hot water.

The technical result that can be obtained using the present invention is reduced to instantly, within 2-3 seconds, turning off the gas valve of the second stage when the voltage disappears in the mains and maintaining the electrical independence of the first stage with a capacity of up to 100 kW, high reliability of providing consumers with heat and hot water.

The technical result is achieved using a two-stage gas burner containing gas valves of the first and second stage, an ignition burner, sensors of operating and limit temperature, traction sensors, network gas, the first and second control units, while the gas valve of the second stage is connected to the second control unit, the latter is connected to the draft sensor, and the gas valve of the first stage is connected to the first control unit, which is connected to the network gas sensor, the limit temperature sensor, while the control unit is second The first stage is additionally equipped with an electromagnetic valve connected in series with the microswitch of the operating temperature sensor.

Thus, the technical result is achieved due to the fact that the solenoid valve is integrated in the gas valve control unit of the second stage, opening the nozzle when the voltage disappears in the mains, which leads to the instantaneous, within 1 second, closing of the gas valve of the second stage and the continued operation of the first stage with a capacity of not more than 100 kW.

Brief Description of the Drawings

Figure 1 shows a two-stage gas burner, pneumatic circuit, General view.

Figure 2 is the same electrical circuit.

The implementation of the invention

The two-stage gas burner consists of a gas valve 1 of the second stage connected to the control unit 2, the latter is connected to the thrust sensor 3, the electromagnetic valve 4, the working temperature sensor 5, which contains a microswitch 6, for example MP-3, and the gas valve 1 of the second stage is connected with the main burner 7 by means of a ball valve 8, while the two-stage gas burner also contains a gas valve 9 of the first stage connected to the control unit 10, and the latter is connected to the sensor 11 of the network gas, the sensor 12 of the temperature limit, the latter contains a microswitch 13, for example MP-2, and the control unit 10 is connected to the control unit 2, while both control units 10 and 2 contain jets 14, and the two-stage gas burner also contains an ignition burner 15, gas valve 1 first steps connected to the main burner 7 by means of a ball valve 16, while the pilot burner 15 contains a thermobimetal plate 17 and a microswitch 18, for example MP-1, and all elements of a two-stage gas burner are connected by impulse tubes ( ie marked).

The electrical circuit of a two-stage gas burner consists of two boards I and II, with board I mounted inside the outdoor boiler (not shown), board II at the standby, and board I containing a circuit breaker F1, microswitch 6, such as MP-3, microswitch 13 , for example, MP-2, the temperature limit sensor 12, the microswitch 18, for example MP-1, under the thermobimetal plate 17, the circuit also contains bulbs L1, L2.

A two-stage gas burner operates as follows.

Turn on the circuit breaker F1, raise the thermo-bimetallic plate 17, open the nozzle of the network gas sensor 11, gas from the gas pipeline (not shown) to the gas valve 1 of the first stage enters through the network gas sensor 11 to the control units 10 and 2 and the pilot burner 15, the last is ignited, after heating the thermobimetallic plate 17, the latter is released, gas is supplied through pulse tubes to the control units 10 and 2 in the cavity above the nozzles 14, while the gas flows through the nozzles 14 into the submembrane cavities of the gas valves 1 and 9 and the first stage, respectively, and, overcoming the resistance, opens the valves 1 and 9, and the opening of the valves 1 and 9 is possible only with the closed nozzles of the temperature sensor 12, traction sensor 3, solenoid valve 4, sequentially open the ball valve 16, the main burner 7 with a power of up to 100 kW, open the ball valve 8, the burning power of the main burner 7 increases to the design value, and when the voltage disappears in the mains, the nozzle of the electromagnetic valve 4 opens, the gas pressure in the submembrane the type of valve 1 of the second stage drops sharply, valve 1 instantly closes within 1 second, the power of the gas burner becomes less than 100 kW, and according to the regulations, such burners can be switched off by controls for 30 seconds, when the nozzle is opened, the sensor 12 for the temperature limit gas valve 9 of the first stage are closed, an emergency shutdown of the main burner 7 occurred, the intervention of maintenance personnel is required, when eliminating the causes of an emergency shutdown and closing the nozzle of the temperature sensor 12, the control unit 10 Again, the main burner 7 is turned on, the thermal power of which is less than 100 kW, but this power is independent of power supply, and when voltage appears, the nozzle of the electromagnetic sensor 4 closes, the gas pressure under the membrane of the gas valve 1 of the second stage increases the contacts of the microswitch 6 MP-3 of the sensor 5 of the operating temperature are closed, the burning power of the main burner 7 again increases to the design value, when the sensor 12 of the temperature limit is triggered, the contacts micro switch 13 MP-2, on board II, the L2 lamp lights up, when the pilot burner 15 goes out, the thermobimetal plate 17 cools down, closes the contacts of the microswitch 18 MP-1, the L1 lamp lights up, signaling the need for intervention by maintenance personnel.

Thus, reliable operation of gas burners with a capacity of more than 100 kW is ensured, ensuring all elements of safe operation of powerful atmospheric burners, while maintaining the energy independence of the first stage of burners with a capacity of up to 100 kW.

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

- instantaneous, within 2-3 seconds, shutdown of the gas valve of the second stage when the voltage in the mains disappears;

- preservation of the electrical independence of the first stage with a capacity of up to 100 kW;

- high reliability of providing consumers with heat and hot water;

- improving the reliability of the pilot burner;

- simplification of the design;

- high-quality fuel combustion.

Claims (1)

A two-stage gas burner containing gas valves of the first and second stage, a pilot burner, sensors for operating and limit temperature, traction sensors, network gas, the first and second control units, while the gas valve of the second stage is connected to the second control unit, the latter is connected to the traction sensor and the gas valve of the first stage is connected to the first control unit, which is connected to the network gas sensor, a temperature limit sensor, characterized in that the control unit of the second stage is further provided an electromagnetic valve connected in series with the microswitch of the operating temperature sensor.

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