RU2321800C1 - Gas burner - Google Patents

Abstract

FIELD: combustion.

SUBSTANCE: gas burner comprises housing, safety valve, and temperature control unit. The flexible pipeline connects the temperature gage with the unit of automatic safety.

EFFECT: enhanced reliability .

2 dwg

Description

The invention relates to household appliances and is intended for the periodic combustion of natural gas in domestic heating boilers equipped with gas.

A gas burner device is known containing a frontal cast-iron shield with an eye for ignition and with a heat reflector, low-pressure injection burners mounted on it, an automatic safety system, gas pipelines with connecting parts, a gas valve (see, for example, Sosnin Yu.P., Bukharkin EN "Household stoves, fireplaces and water heaters." - M .: Stroyizdat, 1985, p.98-100) [1].

However, this gas burner device has a number of disadvantages:

- the complexity of the design of the gas burner, consisting of individual elements: a gas burner head and a mixing device, which, in turn, consists of separately manufactured confuser, neck and diffuser;

- the presence of connecting parts of the elements of the gas-conducting system reduces the reliability of ensuring its tightness;

- the inconvenience of regulating the primary air due to the unsuccessful design of the ring regulator and the inability to supply secondary air leads to the need to complicate the design of the gas device, where the gas burner device is mounted;

- the difficulty of adjusting the locking lever of the automatic security system due to the large number of degrees of freedom between its parts;

- the complexity of servicing a gas valve.

Of the known gas burner devices, the closest in technical essence and the achieved result is a gas burner device designed for the periodic combustion of natural gas in domestic heating furnaces equipped with gas (see, for example, RU 37545 U1, Ml. F23D 14/02, op. 2004 ) [2].

A gas burner device for periodically burning natural gas in domestic heating furnaces, consisting of a frontal shield with a heat reflector, low-pressure injection burners mounted on it, including a gas burner head with two rows of holes and a mixing device, in the end of which a nozzle for supplying combustible gas with a ring regulator of primary air; automatic safety systems, including a mechanical valve, a temperature sensor, a locking lever with a spring, an adjustment bracket and an injection igniter; gas pipelines with connecting parts; gas tap. The front shield is made of sheet steel. In the lower part of the shield there are a number of holes that provide a metered supply of secondary air to the gas burner heads in the combustion zone of the gas-air mixture. The gas burner head and the mixing device are made of a pipe as a whole by the method of plastic deformation, while the holes in the gas burner head are made in two rows with a diameter of 4.5 mm. The primary air ring regulator is made in the form of a disk with protrusions located diametrically opposite to each other. A guide bracket has been introduced into the automatic safety system, a carriage fixed on the bracket with a locking screw, with an axis mounted on it to rotate the lock lever, and a mechanical lock is made on the gas valve.

However, this gas burner device also has a number of disadvantages:

- the presence of external connections of parts of the elements of the gas-conducting system, which reduces the reliability of ensuring its tightness;

- the complexity of the design of the automatic security system;

- inconvenience of operation when firing the burners of a gas burner device.

The technical result of the inventive gas burner device is to increase the convenience of operation and maintenance of gas burner devices by simplifying the design of the device and creating the best conditions for burning combustible gas in heating boilers.

This is achieved by the fact that the known gas burner device for periodically burning natural gas in domestic heating furnaces consists of a frontal shield with a heat reflector. On the frontal shield, low-pressure injection burners are mounted. Each burner includes a gas burner head and a mixing device. In the end part of the mixing device, a nozzle for supplying combustible gas with an annular primary air regulator is installed. An automatic safety system is fixed on the front panel, which includes a mechanical valve, a temperature sensor, a locking lever with a spring, an adjustment bracket, an injection ignition burner, gas pipelines with connecting parts.

The gas valve is installed so that its button is perpendicular to the plane of movement of the locking lever. In the gap of the pipeline between the gas tap and the collector is mounted a temperature regulator of the heat-transfer medium with an aquathermal sensor mounted in the upper cavity of the framing jacket of the boiler. The temperature controller of the heat transfer medium automatically maintains the set temperature of the heat transfer medium by changing the amount of supplied combustible gas to the low pressure injection burners. The safety valve and the temperature regulator of the coolant, combined with a gas valve, are made in a common housing, which is a monolithic block. Two through holes connected with each other, step holes with parallel axes, are created in the block. An annular protrusion with a through hole and with two saddles is made in one through hole. The annular protrusion divides the internal space of the hole into three cavities in which the safety valve elements are installed: the start button, the pressure ring, the figured membrane, the pressure plate with the sealing washer, the plate with the stem, the plug with an internal protrusion in which the centering and guiding blind hole is made, locking spring. Elements of a temperature regulator of a heat-transfer medium and a gas tap are installed in the internal cavity of another hole. In this opening of the housing, a membrane is mounted on the ledge below, which is pressed by the fitting. A flexible conduit from the water sensor is attached to the fitting. A glass with two outer annular protrusions is installed above the membrane, in which grooves are created for installing ring seals. Between the protrusions two diametrically opposite holes are made, which serve to supply combustible gas to the inner cavity of the glass. On top of the glass is connected to a screw and a mechanism for setting the temperature of the coolant. The mechanism for setting the temperature of the coolant is mounted on the bracket, which at the same time is the cover of the safety valve, temperature controller and mounting the unit to the front panel of the gas burner device.

Figure 1 shows a General view of the gas burner device; figure 2 is a longitudinal section of a safety valve and a temperature controller of the coolant. The positions in the drawings indicate:

1 - safety valve;

2 - thermostatic device;

3 - case;

4 - hole for installing parts of the safety valve;

5 - hole for installing parts of thermostatic device and gas tap;

6 - channel;

7 - protrusion of the ring;

8 - channel for supplying combustible gas to the pilot burner;

9 - ignition burner;

10 - upper saddle;

11 - bottom saddle;

12 - button;

13 - the main burners of the heating boiler;

14 - pressure ring;

15 - shaped membrane;

16 - a pressure plate with a sealing gasket;

17 - plates with a stock;

18 - sealing gasket;

19 - locking spring;

20 - a sealing ring;

21 - a stub;

22 - centering nest;

23 - an arm;

24 - fixing screws;

25 - ledge;

26 - groove;

27 - upper cavity;

28 - middle cavity;

29 - lower cavity;

30 - groove ring;

31- membrane;

32 - fitting;

33 - a two-stage hole;

34 - camera;

35 - heat-expanding fluid;

36 - flexible pipe;

37 - aquatic sensor;

38 - the glass is hollow;

39 - upper ledge with a groove;

40 - lower ledge with a groove;

41 - ring seal;

42 - holes in the wall of the glass;

43 - screw with special thread;

44 - mechanism (handle) for setting the temperature of the coolant;

45 - shank;

46 - clearance;

47 - a pusher;

48 - hole inlet of combustible gas from the highway;

49 - viewing damper;

50 - frontal shield;

51 - temperature sensor;

52 - locking lever;

53 - manifold gas distributor;

54 - nozzles;

55 - fire channels;

56 - primary air regulator;

57 - secondary air regulator;

58 - a pipe for supplying combustible gas to the pilot burner;

59 - thermal reflector.

In order to reduce costs, improve and improve the technical parameters of heating equipment for individual use, the safety valve 1 and thermostatic control device 2 are made in one housing 3 (see figure 1, figure 2).

For this, in the monolithic casing 3 two through step openings 4 and 5 with parallel axes were created. Holes 4 and 5 communicate with each other through the created channel 6.

In order to improve the working conditions of the safety valve of the boiler and the installation technology of its parts, hole 4 is made in three stages.

The step shape of the holes 4 of the safety valve is created due to the protrusion 7 of the annular. Channel 8 is made in the annular protrusion 7. Through the channel 8, combustible gas is supplied to the ignition burner 9 (see Fig. 1).

To ensure the tightness of the cavities of the safety valve, the saddles are made on the upper and lower surfaces of the protrusion 7 of the annular: upper - 10 and lower - 11.

The safety valve 1 consists (see FIG. 2) of a button 12 that serves to supply combustible gas from the gas supply system to the burners 13 (see FIG. 1) of the heating boiler; pressure ring 14; membranes 15 curly; plates 16 clamping with a gasket; pusher 47; gaskets 18 sealing; plates 17 with a stock; spring 19 locking; o-rings 20; stubs 21; sockets 22 centering.

The hole 4 in the first stage of the safety valve is an expanded channel (figure 2), which serves to lay the membrane 15 curly and install the ring 14 clamp. A button 12 is installed in the hole of the pressure ring 14, which rests on a figured membrane 15. The clamp ring14 is fixed by the bracket 23 when the latter is fastened with the screws 24 fixing to the body 3.

At the bottom of the hole 4, a thread is made for installing a plug 21 of the safety valve 1. A protrusion 25 with a centering socket 22 is made inside the stub 21. A spring 19 is installed in the cavity of the stub 21 between its body and the protrusion 25, on which a plate 17 with a rod with a sealing gasket 18 is laid. The plate stock 17 is inserted into the socket 22 centering in the plug 21. On the outside of the plug 21, a groove 26 is made in which a sealing ring 20 is installed to prevent leakage of combustible gas from the safety valve 1 into the environment.

The inner space of the safety valve 1, located between the figured membrane 15 and the plug 21, is divided by an annular protrusion 7 into three cavities. The upper cavity 27, enclosed between the figured membrane 15 and the saddle 10 by the upper annular protrusion 7, in which the pressure plate 16 is mounted with a gasket and pusher 47. From the cavity 27 of the upper safety valve 1, combustible gas is supplied to the thermostatic control device 2.

The middle cavity 28 (see FIG. 2) is located between the saddles 11 of the lower and upper 10 of the annular protrusion 7. In the ledge 7, an annular channel 8 is made for supplying combustible gas to the pilot burner 9 (Fig. 1). A pusher 47 is installed in the cavity 28 of the middle safety valve 1 (Fig. 2), a sealing gasket 18 is fixed at the bottom, and a pressure plate 16 with a gasket is installed at the top, in the upper cavity 27.

The lower cavity 29 is located between the plug 21 and the saddle 11 of the lower protrusion 7 of the annular body 3 of the safety valve 1. The lower cavity 29 is blocked by a plate 17 with a stem.

In the initial position (with the button 12 released), the locking spring 19 presses the poppet 17 with the rod against the lower saddle 11 of the annular protrusion 7. At the same time, the pusher 47 acts on the poppet 16 with a sealing gasket and a figured membrane 15, which moves the button 12 to the upper position. In this case, combustible gas does not enter the middle cavity 28 and the upper 27 of the safety valve 1 and, accordingly, to the boiler burners: ignition 9 and main 13.

To regulate the temperature of the coolant in the boiler, a temperature control device is used, combined with a gas tap.

The temperature control device is assembled in a two-stage hole 5. In the lower part of the hole 5 of the housing 3, a groove 30 is made annular for installing the membrane 31. At the end of the hole 5, a thread is cut to secure the fitting 32. In the fitting 32, a coaxial two-stage hole 33 is made. Hole 33 of the fitting 32 s a large diameter forms a chamber 34 with the membrane 31, which is filled with a heat-expanding fluid 35. From the side of the smaller diameter, a flexible conduit 36 is connected to the fitting 32, connecting the water sensor 37 installed in the water the boiler jacket, with a chamber 34. In the upper part of the hole 5, a hollow glass 38 is installed with two annular protrusions 39 and 40, in which grooves are made for installing 41 gasket seals, designed to prevent the ingress of combustible gas into the surrounding space and to the burners of the gas heating boiler . Between the protrusions 39 and 40, two diametrically opposite openings 42 are made, which serve to supply combustible gas to the inner cavity of the glass 38.

The glass 38 on the outside of the bottom has a shank 45 connected to the screw 43. On the opposite side of the shank 45, a handle (mechanism) 44 is fixed to set the temperature of the heat transfer medium in the boiler. When the handle 44 is rotated counterclockwise, the cup 38 moves upward and a gap 46 appears between the end plane of the cup 38 and the membrane 31. By changing the size of the gap 46, the flow of combustible gas and, therefore, the temperature of the heat-transfer medium of the heating boiler are regulated. The temperature medium temperature setpoint is simultaneously a gas tap and serves to shut off the supply of combustible gas to the main burners of the heating boiler

Before igniting the boiler by turning the knob 44 to set the temperature of the thermostatic device, the required temperature of the heat-transfer medium in the boiler is set by changing the gap 46 between the end of the wall of the cup 38 and the surface of the membrane 31. Then the gas valve opens on the gas pipeline supplying combustible gas to the heating boiler. In this case, combustible gas enters only into the cavity 29 of the lower safety valve 1. A match or paper harness is lit. Presses the button 12 of the safety valve 1 to failure (figure 2). In this case, the figured membrane 15 bends and the pressure plate 16 with the gasket moves down to the stop in the upper seat 10 of the protrusion 7 of the annular safety valve 1. At the same time, the pusher 47 acts on the plate 17 with the rod and moves them down. In this case, the middle cavity 28 of the safety valve 1 communicates with the combustible gas supply line, and the upper cavity 27 is blocked by a pressure plate 16 with a gasket. In this case, the combustible gas from the gas supply line is supplied to the cavity 28 of the middle of the safety valve 1, and through the tube 58 of the supply of combustible gas to the ignition burner, directly to the mixer of the ignition burner 9 (Fig. 1). In the mixer of the ignition burner 9, an air-gas mixture is formed. Through the flap 49 viewing on the flap 50 frontal bring the lit torch to the ignition burner 9.

The gas-air mixture exiting from the openings of the ignition burner 9 is ignited by the brought torch. The flame of the ignition burner 9 heats the temperature sensor 51 of the burner device. When heated, the length of the temperature sensor 51 increases. The locking lever 52, connected by a locking screw to the temperature sensor 51 (Fig. 1), rotates around an axis mounted on the carriage (the axis and carriage are not indicated in Fig. 1). The free end of the locking lever 52 is shifted away from the flap 50 frontal with a heat reflector 59 and finds on the pressed start button 12 of the safety valve 1 (Fig. 1 and Fig. 2). With steady burning of the flame of the pilot burner 9, the button 12 of the safety start valve 1 must be kept pressed until the locking lever 52 finds at least one third of its diameter of the end surface. After that, pressing and holding with the finger the start button 12 of the safety valve 1 stops, since it is already fixed by the locking lever 52.

In this case, the locking spring 19 raises the plate 17 with the rod and through the pusher 47 raises the plate 16 presser with a gasket. The cavity 27 of the upper safety valve 1 is ajar. Combustible gas enters into it and passes through the channel 6 to the temperature control device 2. Combustible gas enters the space between the protrusions 39 and 40 on the cup 38, and then through the diametrically opposite openings 42 in the wall of the cup 38 it enters into its internal cavity and passes through the gap 46 between the end walls of the cup 38 and the membrane 31, enters the manifold-gas distributor 53. From the manifold-gas distributor 53, combustible gas is supplied through the nozzle 54 to the mixing device of the main gas burner 13, in which the gas is formed Naya mixture. Further, at the exit from the openings of the fire channels 55 of the main burner 13, the gas-air mixture is ignited by the ignition burner 9 with the formation of torches above each fire channel 55 of the main gas burner 13.

To ensure the best conditions for fuel combustion, the primary air is regulated by the regulator 56 by moving it until a blue-blue flame appears, and the amount of secondary air is set by the calibrated dimensions of the holes located on the front panel 50, or is set by the secondary air supply regulator 57 to the boiler furnace space (Fig. .1) by resizing the openings by moving the secondary air regulator 57 along the guides.

When a gas-air mixture is burned by gas burners, the heat-transfer fluid is heated, which, due to convective heat transfer, begins to circulate in the boiler through the heating system of the heated room. The heat-expanding liquid 35 of the water sensor 37 installed in the upper cavity 27 of the boiler framing starts to heat up and expands through the flexible pipe 36 into the chamber 34 of the temperature control device 2. Due to the increase in the volume of heat-expanding liquid 35, the temperature control membrane 31 is bent. The gap between the membrane 31 and the end of the glass 38 of the hollow temperature control device 2 is reduced. The supply of combustible gas to gas burners is reduced. This leads to a decrease in heating of the coolant of the boiler. With decreasing temperature of the heat-transfer medium, the volume of heat-expanding liquid 35 in the water sensor 37 decreases, and the gap between the end face of the glass 38 and the membrane 31 increases. This leads to an increase in the supply of combustible gas to the main burners 13 and an increase in the temperature of the coolant in the boiler and heating system. Thus, by changing the gap 46, the set temperature in the heated room is automatically maintained. When the temperature exceeds a predetermined temperature, the heat-expanding liquid 35 of the water sensor 37 increases its volume, the membrane 31 bends to such a value that the gap 46 between the end of the walls 38 of the glass and the membrane 31 is closed. The supply of combustible gas to the burners ceases, and the flame on the burners goes out. In this case, the ignition burner 9 continues to burn. When the temperature of the coolant decreases below a predetermined volume of the heat-expanding liquid 35 in the water sensor 37 decreases, the deflection of the membrane 31 decreases, a gap appears between the membrane 31 and the shank 45. Combustible gas begins to flow into the gas burner mixers. The flame of the ignition burner ignites the gas in the fire channels 55 on the main burners 13 of the boiler. The temperature of the coolant begins to increase. If there is a violation or lack of draft in the chimney, the flame goes out on the ignition burner 9, the length of the temperature sensor 51 decreases, the free end of the locking lever 52 moves toward the front shield 50 and leaves the pressed start button 12 of the safety valve 1. The spring 19 of the safety valve 1 presses the poppet 17 with the rod against the seat 11 of the lower annular protrusion 7. At the same time, the pusher 47 acts on the poppet 16, which is pressed with a gasket, a figured membrane 15, which raise the button 12 to the upper position. In this case, the combustible gas stops flowing into the cavities 28 of the middle and upper 27 of the safety valve 1 and, accordingly, to the ignition 9 and the main burners 13 of the boiler (Fig. 1). At the end of the furnace, the handle 44 (figure 2) rotates clockwise to the closed position. In this case, the flow of combustible gas to the burners 13 of the boiler is stopped. The flame on the burners 13 goes out. Then the gas valve on the gas line for supplying combustible gas is closed.

The proposed "gas burner device" is used in heating boilers and devices of the type AOGV and AKGV with a nominal heat output of 6.9 to 50 kW at a nominal operating pressure of natural gas in the network of 1274 Pa (130 mm water column) designed for heating residential and industrial premises.

The use of new elements in a gas burner device distinguishes the proposed device, as it allows you to:

- reduce the intensity of the product;

- increase the manufacturability of the manufacture of heating equipment by reducing the length of the pipeline, reducing the number of connecting parts and assemblies, and, as a result, increase the degree of reliability of sealed joints;

- the presence of a flexible pipeline connecting the water sensor with the automatic safety unit eliminates the requirements of a rigid linking of the installation site, which simplifies the assembly and installation of the control system of the heating boiler;

- the proposed gas burner device is universal and can be installed on various brands and types of domestic heating boilers and devices without changing their design;

- for repair, the safety automation system does not require the use of a special tool;

- reliability is enhanced by combining the safety valve and thermostatic device in a single housing;

- the cost of manufacturing the proposed automatic safety system of heating equipment is lower than the production of mass-produced systems at present;

- the transition to the manufacture of the proposed automatic safety system allows the use of elements and parts of previously produced systems and does not require the development and use of additional tooling and equipment.

The proposed technical solution facilitates and simplifies the operation of the device during operation, adjustment, preventive maintenance, inspection and repair.

Claims (1)

A gas burner device for periodically burning natural gas in domestic heating boilers, consisting of a frontal shield with a heat reflector and low-pressure injection burners mounted on it, each burner includes a gas burner head and a mixing device, in the end of which there is a nozzle for supplying combustible gas with ring regulator of primary air; automatic safety systems, including a mechanical valve, a temperature sensor, a locking lever with a spring, an adjustment bracket and an injection ignition burner; pipelines with connecting parts, the gas valve is installed so that its button is perpendicular to the plane of movement of the clamp lever, and a temperature regulator of the heat-transfer medium is mounted in the gap between the gas valve and the manifold, the sensor of which is installed in the upper cavity of the boiler framing jacket and automatically maintains the set temperature medium due to a change in the amount of supplied combustible gas to low pressure injection burners, characterized in that that the safety valve and the temperature regulator of the coolant, combined with a gas valve, are made in a common case, which is a monolithic block, in which two through, interconnected step openings with parallel axes are created, and an annular protrusion with a through hole is made in one through hole and with two saddles, while the annular protrusion divides the inner space of the hole into three cavities in which the safety valve elements are installed: the start button; pressure ring; figured membrane; pressure plate with sealing washer and plate with stem; a cap with an internal protrusion in which a centering and guiding blind hole is made; locking spring; elements of a temperature regulator of a heat-transfer medium and a gas valve are installed in the inner cavity of another hole; in this case, a membrane is installed on the protrusion of the housing opening, pressed by a fitting that is made with a coaxial two-stage hole, a larger diameter hole of the fitting forms a chamber filled with a heat-expanding liquid with the membrane, and to the hole a smaller diameter nozzle is connected by a flexible pipeline to an aquatic sensor filled with a heat-expanding liquid; a glass with knowing the outer annular protrusions, in which the grooves for installing the annular seals are created, and two diametrically opposite openings are made between the protrusions, which serve for supplying combustible gas to the internal cavity of the thermostat cup, the top of the cup is connected to a screw and a mechanism for setting the temperature of the coolant, a mechanism for setting the temperature of the coolant the medium is mounted on a bracket, which at the same time is the cover of the safety valve, temperature controller and the unit is attached to the front Gas burner visor device.

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