RU2516071C2 - Ignition burner - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: invention relates to the field of power engineering, in particular, to ignition burners in devices for combustion of gaseous fuel. The ignition burner comprises a body, on which a thermobimetallic plate 2 is fixed, at the same time on the body there is a sensor 3 of pipeline gas with a normally closed nozzle, and an igniter, and the pneumatic circuit of the ignition burner comprises a gas valve 5, a control and regulation channel 6, temperature sensors 7, a draught sensor 8, the main burner 9, the pipeline sensor 3, a tap 10, an ignition burner 11 with a thermobimetallic plate 2, at the same time the gas valve 5 comprises a seat 12 of the valve 5, an elastic element 13, an under-membrane space 14, a membrane 15, the sensor of pipeline gas 3 comprises additionally installed an elastic valve 16 with an axis 17 and a spring 18, to move the thermobimetallic plate 2 as the flame of the ignition burner 11 goes off, at the same time all elements of the pneumatic circuit are connected by pulse tubes.

EFFECT: invention is aimed at reduction of time of actuation of a pipeline gas sensor, its increased reliability and safety during operation.

2 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of energy, in particular, to ignition burners in devices for burning gaseous fuels and can be used in atmospheric gas burner devices with non-volatile drive of gas valves of steam and hot water boilers.

State of the art

A known ignition burner containing a flame sensor installed in a housing with a thermo-bimetallic plate and a flame sensor including a normally open nozzle, impulse tubes, a control system and a gas regulator (see. Two-stage atmospheric gas burner. RGU - M1 operating instructions for Ca 2. 574.023. RE JSC "Starorusspribor Plant", 175200 Staraya Russa, Novgorod Region, Mineralnaya St., 24).

The disadvantage of this burner is the design complexity, low reliability, high costs of heat production.

Known safety automation of gas-using devices, containing a pneumatic-gas protection and control unit with a control valve having a membrane actuator and associated flame sensors, traction and a water temperature controller, while it additionally contains a start and block valve located in the control valve body, and also a control mechanism located in the housing of the upper cover of the unit, consisting of a control handle rigidly connected to the spring axis with a flag that can be rotated along e with the axis, and in the “START” position - axial movement when pressed, as well as the end cam with a slot for the flag, the pneumatic and gas protection and regulation unit is equipped with an additional operating valve with a single-membrane actuator, the input of which is connected to the gas supply network, and the output is connected to the collector of the gas burner device, while the submembrane cavity of the valve is connected through the water temperature regulator to the output of the blocking valve, as well as to the discharge pipe.

In automation, in the case of the upper block cover there is a spring-loaded STOP button located coaxially with the control valve. In automation, the submembrane cavity of the working valve is connected to the output of the blocking valve (see Pat. RU No. 2172447, IPC F24N 5/00, published on 08.20.2001).

The disadvantage of this automation is its low reliability and performance.

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 a flame sensor, traction control channel, while it is equipped with a second gas regulator consisting of a control unit connected to temperature sensors for water and outdoor air, the control unit, while the second gas regulator is installed with the possibility of parallel connection of the cavities of the control units and the temperature sensor external air by connecting to the control unit of the second gas regulator, and the percentage of gas supply to the burner by both regulators is set by taps (see US Pat. RU No. 2196939, IPC F24N 1/00, F24D 14/60, publ. 20.01.2003) .

The disadvantage of this gas burner is its low reliability, design complexity.

The closest in technical essence and the achieved positive effect and accepted by the author for the prototype is a pilot burner containing 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 on the sensor case a flame above the bimetallic plate, a network gas sensor with a normally closed valve and a gas start lever are installed, while the network gas sensor is connected using pulse tubes with a flame sensor housing pipe, a gas main burner regulator control system (see. US Pat. RU №2319899, IPC F24N 5/04, of 21.07.2006 g).

The disadvantage of this burner is the duration of the signal transmission to turn off the gas valves of the main burner, since gas burners with a power of less than 100 kW usually use ignition burners with the gas valve turned off by a flame sensor activated by a thermobimetal plate when the flame of the ignition burner is extinguished, and the response time is up to 30 seconds, and for more powerful burners, the time for giving the signal to close the gas valves should not exceed 2 seconds, which is unattainable when used and a conventional drive termobimetallicheskoy plates as a flame sensor, for this purpose, the photoelectric effect, diode flame effect controlled via the ionisation electrode and some other effects, but it is complicated and insufficiently reliable manner, which is very expensive apparatus requiring backup power.

Disclosure of invention

The objective of the invention is to develop an ignition burner for gas burner devices, which has a reduction in the response time of the flame sensor for turning off the gas valve by a flame sensor, the function of which is performed by the network gas sensor, by actuating the thermobimetallic plate, when the flame of the ignition burner is extinguished, thereby increasing its reliability work and safety during operation.

The technical result, which can be obtained using the present invention, is to reduce the response time of the network gas sensor, increase its reliability and safety during operation.

The technical result is achieved using an ignition burner containing a housing on which a thermo-bimetallic plate, a network gas sensor and an igniter are fixed, while the network gas sensor is mounted above the thermo-bimetallic plate and is additionally equipped with an elastic valve with an axis and a spring, with the possibility of simultaneously performing the function of a flame sensor and network gas sensor.

Brief Description of the Drawings

Figure 1 is given, ignition burner, General view.

Figure 2, too, is a pneumatic diagram of the pilot burner.

The implementation of the invention

The ignition burner (Fig. 1) consists of a housing 1, on which a thermobimetallic plate 2 is fixed, while on the housing 1 a gas sensor 3 is installed with a normally closed nozzle, and an igniter 4, and the pneumatic circuit of the ignition burner (see Fig. 2) contains a gas valve 5, a control and regulation channel 6, temperature sensors 7, a draft sensor 8, a main burner 9, a network gas sensor 3, a valve 10, an ignition burner 11 with a thermobimetal plate 2, while the gas valve 5 comprises a valve seat 12, 5 elastic element 13, submembrane space 14, the membrane 15, and the network gas sensor 3 contains additionally installed: an elastic valve 16 with an axis 17 and a spring 18, to move the thermobimetallic plate 2 when the flame of the ignition burner 11 is extinguished, while all the elements of the pneumatic circuit are connected by pulse tubes (in FIG. not marked).

The ignition burner operates as follows.

The end of the thermobimetallic plate 2 is lifted upward, the nozzle of the network gas sensor 3 is opened, gas is supplied through the pulse tube through the nozzle of the network gas sensor 3 to the ignition burner 11 and the control and regulation channel 6, the igniter is ignited, while after heating the thermobimetallic plate 2, the end release if the sensors 7 and 8 - temperature, thrust, respectively - are closed, the gas enters the control and regulation channel 6, into the submembrane space 14 of the gas valve 5, the membrane 15, overcoming the pressure resistance ha and on the elastic element 13, lifts it above the seat 12, open the valve 10, the main burner 9 lights up, and in the prototype, first open the network gas sensor and only after heating the thermobimetallic plate the flame sensor was closed, which increased the response time of the flame sensor, while the present invention, when the coolant is heated to the temperature set by the sensor 7, the nozzle of the sensor 7 opens, the gas pressure in the submembrane cavity 14 of the gas valve 5 decreases, the gas valve 5 closes, the main burner 9 goes out, the ignition burner 11 continues to work, when the coolant cools, the nozzle of the temperature sensor 7 closes, the gas pressure in the submembrane cavity 14 of the gas valve 5 increases, the gas valve 5 opens, the main burner 9 automatically switches back on, the same happens when the sensor 8 is triggered traction, when the flame of the ignition burner 11 is extinguished, the flame ceases to maintain the thermobimetal plate 2 in tension, the plate is washed by cold air entering the furnace and washed by cold gas Ohm, the extinguished ignition burner 11, as a result of the spring 18 of the network gas sensor 3, the valve 16 pushes down the thermo-bimetallic plate 2, the elastic valve 16 closes the nozzle of the network gas sensor 3, and through the ignition burner 11, the gas is vented from the control and regulation channel 6, a submembrane cavity 14, and the membrane 15 ceases to maintain the elastic element 13 in the upper position and under the influence of gas pressure, the elastic element 13 lowers onto the seat 12, the gas valve 5 closes, the main burner 9 goes out, and in type, after the ignition of the ignition burner, thermobimetal plate, cooling. Slowly opens the flame sensor and after 30 seconds. It closes the nozzle of the network gas sensor, which increases the shutdown time of the main burner, and to resume operation of the main burner 9, according to the invention, it is necessary to re-ignite in the sequence described above, while there is no danger of gas popping in the furnace.

Thus, the additional supply of the network gas sensor 3 with an elastic valve 16 with an axis 17 and a spring 18, to move the thermobimetallic plate 2 when the flame of the ignition burner 11 is extinguished, makes it possible to perform the function of a flame sensor, which simplifies the design.

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

- reducing the response time of the network gas sensor;

- increase its reliability and safety during operation;

- cheaper heat production;

- improving the reliability of the pilot burner;

- simplification of the design;

- high-quality fuel combustion.

Claims (1)

Ignition burner comprising a housing on which a thermo-bimetallic plate is mounted, a network gas sensor and an igniter, characterized in that the network gas sensor is mounted above the thermo-bimetallic plate and is additionally equipped with an elastic valve with an axis and a spring, with the possibility of simultaneously performing the functions of a flame sensor and a network gas sensor .

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