RU129602U1 - GAS-USING DEVICE SAFETY AUTOMATION - Google Patents

Abstract

1. Safety automatics of gas-using devices, comprising a safety unit and associated flame and draft sensors, an igniter associated with a burner, characterized in that said safety unit is equipped with an additional shut-off valve, the inlet cavity of which is connected to the gas supply network through a gas supply channel and the outlet cavity is in communication with the gas outlet channel to the gas valve, moreover, the automation comprises a block of burner pipes, a manifold with nozzles and dampers, said gas valve located between wrinkled by a shut-off valve and a manifold of a gas burner device and configured to regulate by means of its rotation by the consumer to burn the power of the ignition burner, to burn the main burners, to completely shut it off, the igniter unit including the ignitor located on the panel of the igniter unit, provided with a bimetallic plate, which is a sensing element of the flame sensor, and is connected by a pulse tube and a pilot tube to a shut-off valve, wherein said shut-off valve The atrium contains a supravalvular cavity, which communicates with the aforementioned igniter via a pilot tube, a middle cavity separated from the aforementioned supravalvular cavity by a wall and a saddle, on which a valve closure is connected, connected to a spring-loaded stem rigidly connected to a small membrane, with the formation of a spring-membrane mechanism, moreover, a small membrane is mounted above a large membrane fixed on the lower side of the safety unit with a lower cover, forming a lower sub-membrane between the large membrane and the lower cover

Description

The inventive utility model, the safety automatics of gas-powered devices, relates to the automation of heat and power processes and can be used in gas-powered installations certified with it (including heating boilers and heating, bath-stove, sauna, convector) appliances running on low-pressure natural gas. The safety automation of gas-powered devices ensures the safe operation of the gas-powered installation and automatically maintains the set temperature of the coolant (water or air).

Of the analogues of the prior art, “Series production automation, type AGK-2, is known, comprising a safety unit and flame and traction sensors associated with the safety unit.

The disadvantage of this automation is that the automatic control of the heating unit is carried out without taking into account the air temperature in the heated rooms, which often leads to an excessive consumption of fuel.

Of the analogues of the prior art, the closest to the claimed utility model in terms of essential features - a prototype can be adopted automation for small-sized household units such as RGU-2, containing a safety unit and associated flame and traction sensors (TU 25.02.012313-81 - Staraya Russa , 1981., which is also known from the description of the invention to copyright certificate No. 1721397 for application No. 4776622 dated January 3, 1990, “Automation of a gas-fired heating unit, applicant Ukrainian State Design and Research Institute of gas supply, heat supply and comprehensive improvement of cities and towns of Ukraine, authors Papush Efim Adolfovich et al., published March 23, 1992).

To exclude the unsafe operation of automation, the pilot ignition is performed sequentially and, if there is a steady flame, it is possible to turn on the safety unit and supply gas to the burner. If the protection parameters of the unit are violated, the corresponding flame or draft sensor is triggered, discharging the pulsed gas, which leads to a cutoff of the gas supply.

The lack of automation for small-sized household units such as RGU-2:

1. High fuel consumption, since automation does not allow you to adjust the gas flow at the igniter and low reliability and safety of the gas burner device, since the structural elements of the automation system of gas-using devices are often overheated.

2. Automation has no means of protection in emergency situations.

3. Automation does not provide the ability to control heating and maintain the temperature in the room from 5 to 35 degrees at the request of the consumer.

The technical result of the claimed utility model is:

1. Fuel saving, improving the reliability of the gas burner device, as well as improving the safety of gas-using devices.

2. The ability to provide heating and maintain indoor temperature from 5 to 35 degrees.

3. Automation has several degrees of protection in emergency situations:

- when the flame goes out on the ignition burner;

- in the absence of traction;

- with leaks in the pulse system;

- when lowering the gas pressure in the network is not lower than the minimum operating value.

The technical result of the claimed utility model in comparison with the automation for small-sized household units such as RGU-2, adopted as a prototype, containing a safety unit and associated flame and traction sensors, an ignitor associated with a burner, in the claimed utility model, in the safety automation of gas-using devices , is achieved by the fact that the said safety unit is equipped with an additional shutoff valve, the inlet cavity of which is connected to the gas supply network through the gas supply channel, and the outlet cavity is in communication is connected with a gas outlet channel to the gas valve, moreover, the automation comprises a burner pipe block, a manifold with nozzles and dampers, said gas valve located between the said shut-off valve and the gas-burner manifold and configured to regulate by means of the consumer turning it on the combustion power of the ignition burner , on the combustion of the main burners, on its complete shutdown, the igniter block, including the ignitor located on the panel of the igniter block, equipped with a bimetallic a th plate, which is a sensitive element of the flame sensor and is connected by a pulse tube and a pilot tube to a shut-off valve, while said shut-off valve contains a supravalve cavity, which through a pilot tube communicates with said igniter, a middle cavity separated from the said supravalve cavity by a wall and a saddle , on which a valve shutter is connected, connected to a spring-loaded rod rigidly connected to a small membrane, with the formation of a spring-membrane mechanism, and a small membrane the wound is mounted over a large membrane fixed to the lower side of the safety unit by a lower cover, which forms a lower submembrane cavity between the large membrane and the lower cover, which communicates with said flame and traction sensors through said impulse tubes, and said output cavity is connected to the throttle via a channel said lower submembrane cavity, moreover, the automation is configured to control closing of the shutoff valve when the pressure drops below the minimum operating value or short-term shutdown of the gas supply by means of the said spring-membrane mechanism, which provides for the regulation of the difference between the areas of the large and small membranes of the shut-off valve, while a hole is made on the top cover of the shut-off valve, communicating with the hole in the pilot tube, in which the adjustment needle is installed, made with the possibility of regulating the gas flow on said igniter by changing the position of the adjustment needle relative to the hole in the igniter tube, with iem improve flame igniter communication with the main burner gas burner devices due to the flame stream accelerates through the channel of said igniter unit.

The technical result of the claimed utility model is fuel saving, improving the reliability and safety of automation, is achieved by optimizing the process of burning fuel and optimal operation of the gas burner device and eliminates overheating of the gas burner device of the gas-using installation, as the automation has several degrees of protection in emergency situations:

- when the flame goes out on the ignition burner;

- in the absence of traction;

- with leaks in the pulse system;

- when lowering the gas pressure in the network is not lower than the minimum operating value.

Protection of automation in emergency situations is achieved by the fact that the automation is made with the possibility of regulating the closing of the shut-off valve when the pressure drops below the minimum operating value or short-term shutdown of the gas supply by means of a spring-membrane mechanism that provides for the regulation of the difference in the areas of the large and small membrane of the shut-off valve.

The technical result of fuel saving is also achieved by the fact that the automation is made with the possibility of regulating the gas flow rate on the aforementioned igniter, determined by the position of the adjustment needle located on the top cover and providing improved fire connection of the igniter with the main burners of the gas burner device due to the flow of flame accelerating along the channel of the said block igniter.

The technical result, the possibility of heating and maintaining the temperature in the room from 5 to 35 degrees, is achieved by the fact that the said gas valve located between the said shut-off valve and the gas burner device is configured to regulate by means of its rotation by the consumer to burn the power of the ignition burner, burning of the main burners, to turn it off completely.

An additional technical result is the ability to adjust the secondary air, is achieved by the fact that the automation is made with the possibility of adjusting the amount of air supplied to the combustion chamber by means of a gate located in the lower part of the furnace.

Safety automatics of gas-using devices are illustrated by drawings, which depict:

Figure 1. General view of the safety automation device for gas-using devices.

Figure 2. Safety automatics of gas-using devices, front view.

Figure 3. Safety automatics of gas-using devices, top view.

Figure 4. Safety automatics of gas-using devices, side view.

Figure 5. Cut-off valve device, sectional view.

6. Flame sensor (view A in FIG. 2).

The essence of the utility model.

The safety automation of gas-using devices includes a safety unit 1 (Figs. 1-4), comprising a shut-off valve 2 (Figs. 1-5) with a membrane mechanism and flame sensors 3 (Figs. 1-5) connected to the shut-off valve 2 (Figs. 1-5). .6) and traction 4 (figures 1, 3, 4). Automation contains a block of burner pipes 5 (Figs. 1-3), a manifold 6 (Figs. 1, 3, 4) with nozzles 7 (Fig. 3) and dampers 8 (Figs. 1, 3, 4), a gas valve 9 ( 4), located between the shut-off valve 2 (Figs. 1-5) and the manifold 6 (Figs. 1, 3, 4) of the gas burner device, the igniter unit 10 (Figs. 1-4) containing the ignitor 11 (Figs. 2, 3), equipped with a bimetallic plate 12 (Fig.6), which is a sensitive element of the flame sensor 3 (Fig.6). The ignitor 11 (figure 2, 3) is connected to the tube of the ignitor 13 (figure 1, 3, 4). The gas valve 9 (Fig. 4) is configured to regulate by means of its rotation by the consumer the combustion power of the igniter 11 (Figs. 2, 3), the combustion of the main burners (not shown in the drawing), its complete shutdown. The flame sensor 3 (Fig.6) and the thrust sensor 4 (Fig.1, 3, 4) are connected to the shut-off valve 2 (Fig.1-5) by impulse tubes 14 (Fig.1-4). The output cavity 15 (figure 5) of the shut-off valve 2 (figure 5) communicates with the channel 16 (figure 5) of the gas outlet to the gas valve 9 (figure 4), and then to the manifold 6 (figures 1, 3, 5) gas burner device. The input cavity 17 (Fig. 5) is connected to the gas supply network through the gas supply channel 18 (Figs. 1, 2, 5). Valve-. the shut-off device 2 (Figs. 1-5) comprises a valve shutter 19 (Fig. 5), a supravalve cavity 20 (Fig. 5), which communicates through the igniter tube 13 (Figs. 1, 3, 4) with the ignitor 11 (Fig. 2) , 3), the lower submembrane cavity 21 (Fig. 5), which, through the impulse tubes 14 (Figs. 1-4), communicates with the flame sensors 3 (Fig. 6) and thrust 4 (Figs. 1, 3, 4), and also contains a wall 22 (Fig. 5) and a seat 23 (Fig. 5), on which a valve shutter 19 (Fig. 5) rests, connected to a spring-loaded stem 24 (Fig. 5), rigidly connected to a small membrane 25 (Fig. 5), with the formation of the spring-membrane mechanism installed above the large membrane 26 (Fig. 5), mounted on the lower side of the safety unit 1 (Figs. 1-4) with a lower cover 27 (Fig. 5) forming between the large membrane and the lower cover 27 (Fig. 5) a lower submembrane cavity 21 (figure 1). The output cavity 15 (Fig. 5) of the shut-off valve 2 (Figs. 1-5) is connected through a channel with a throttle 28 (Fig. 5) to the lower submembrane cavity 21 (Fig. 5). The shut-off valve 2 (FIGS. 1-5) also contains a middle cavity 29 (FIG. 5), separated from the supravalve cavity 20 (FIG. 5) by a wall 22 (FIG. 5) and a seat 23 (FIG. 5). The valve shutter 19 (figure 5) has a base 30 (figure 5), rigidly connected by a spring-loaded rod 24 (figure 5). In the top cover 31 (Fig. 5) of the shut-off valve 2 (Figs. 1-5), an opening 32 (Fig. 5) is made, which communicates with the hole in the igniter tube 13 (Figs. 1-4), in which an adjustment needle 33 is installed (Fig. 5), configured to control the gas flow rate on the igniter 11 (Fig. 2, 3) by changing the position of the adjusting needle 33 (Fig. 5) relative to the hole in the igniter tube 13 (Fig. 5), with the improvement of fire communication igniter 11 (FIGS. 2, 3) with the main burners of the burner pipe 5 (FIGS. 1-3) of the gas burner device due to the flow of flame, accelerating passing through the channel (not indicated in the drawing) the igniter unit 10 (Fig.1-4). On the panel 34 (Figs. 1-4) of the gas burner device there is a viewing window 35 (Fig. 1) for monitoring the operation of the igniter 11 (Figs. 2, 3). In the lower part of the furnace is a gate 36 (figure 1), made with the possibility of regulating the secondary air. On the top cover 31 (FIG. 5), a screw 37 (FIG. 5) is installed in the hole 32 (FIG. 5), paired with an adjustment needle 33 (FIG. 5), which is positioned on the top cover 31 (FIG. 5), by changing the position of the adjusting needle 33 (Fig. 5) relative to the hole 13 (Fig. 5), in the igniter tube 11 (Fig. 5), regulates the gas flow rate at the igniter 11 (Fig. 2, 3), which ensures fuel saving and improved fire the connection of the ignitor 11 (Fig. 2, 3) with the main burners (not shown) of the burner pipe 5 (Figs. 1-3) due to the flow of flame accelerating along the channel of the igniter block 10 (Figs. 1-4). Automation provides heating and maintaining the temperature in the room from 5 to 35 degrees by regulating the temperature of the gas valve 9 (figure 4), made with the possibility of regulation by turning the gas valve 9 (figure 4) by the consumer to burn the igniter 11 (figure 2, 3 ), for burning the main burners of the burner pipe 5 (Figs. 1, 3) and for its complete shutdown.

An example of a utility model.

Maximum gas pressure in the network, kPa 1.8 Nominal gas pressure in the network, kPa 1.3 Minimum working pressure kPa 0.6 Rated thermal power, kW 15 ± 0.15

Stabilized pressure in the collector at the inlet pressure of the network from 1.5 to 3 kPa, kW 0.9 ± 0.15

Safety requirements. Inertial period of gas supply interruption by automatics, sec.

- in the absence of draft in the chimney, within 10-60

- when the ignition burner goes out, within 30-60

- in case of leaks in the pulse system, - no more than 2 seconds.

Inertial period of switching on the automation when igniting the ignition burner, sec, no more 60 sec Set weight, kg, no more. 7 Vacuum in the furnace Pa 5-25

The work of automation is as follows.

Ventilate the room in which the automation is installed for 10-15 minutes. Check the operation of the supply and exhaust ventilation of the room by holding a strip of paper to the air channels. Check if the valve 9 is closed on the lowering of the gas pipeline to the furnace and on the manifold 6 of the gas burner device. Check for draft in the chimney (not shown in the drawing) by holding a strip of paper at the firing hole of the gas burner. Ventilate the firebox and furnace flues (not shown in the drawing) for 10 minutes, fully opening the air supply shutter 8 (the blower door should be open by a value ensuring normal traction) located on the panel 34 of the gas burner device. After airing, cover the shutter 8 in accordance with the operating position.

Ignition of the igniter 11 and the burner pipes 5 is as follows. Open the gas valve 9. When igniting the igniter 11, the gas valve 9 of the automation must be closed! Open the shutter of the viewing window 35, insert a burning paper rope or splinter into the window 35, then press the lever (not indicated in the drawing) of the shut-off valve 2 down and hold it in this position for at least 60 seconds. After ignition of the gas on the pilot 11, the paper tow is removed and extinguished. Check whether the flame is well washed by the end of the bimetallic plate 12 of the flame sensor 3 and close the ignition hole with a shutter (not shown in the drawing). If the flame of the igniter 11 heats up the bimetallic plate 12 poorly or the gas throughout the ignitor 11 does not ignite, stop ignition. After stopping the gas supply, check the ignition holes and the nozzle hole on the ignition tube 13 on the igniter 11. If necessary, clean the ignition nozzle 11 with a wire (needle) ,8 0.8 mm, then repeat the ignition in the above sequence. After 60 seconds after ignition of the igniter 11, make sure that the gas burns on the igniter 11. With strong draft in the chimney, the burner pipes 5 start to “buzz”. In this case, close the furnace shutter 8, ensuring the normal torch of burner 5 according to clause 7.5.7. Open the gas valve 9 of the gas burner automation device and make sure that the gas ignites on the burner pipes 5. Adjust the primary air supply to the burner pipes 5 by rotating the dampers 8 on the nozzles 7 of the manifold 6 until a blue, steady flame appears on the burner pipes 5 without interruption and breakthroughs. When operating automation, periodic monitoring of gas combustion and furnace traction should be carried out. If necessary, adjust the secondary air supply using the gate 36 or blowing the furnace. After heating the oven to the required temperature, the automation must be turned off. To turn off the automation, it is necessary to sequentially close the taps (not shown in the drawing) in front of the main burner of the burner pipes 5 and the gas valve 9 at the lowering of the gas pipeline to the automation. 5-10 minutes after turning off the automation, close the damper (not shown) of the furnace chimney. The pressure is maintained by throttling the gas through an annular gap between the plane of the valve and the hole (not shown) in the cover body 27.

Claims (2)

1. Safety automatics of gas-using devices, comprising a safety unit and associated flame and draft sensors, an igniter associated with a burner, characterized in that said safety unit is equipped with an additional shut-off valve, the inlet cavity of which is connected to the gas supply network through a gas supply channel and the outlet cavity is in communication with the gas outlet channel to the gas valve, moreover, the automation comprises a block of burner pipes, a manifold with nozzles and dampers, said gas valve located between wrinkled by a shut-off valve and a manifold of a gas burner device and configured to regulate by means of its rotation by the consumer to burn the power of the ignition burner, to burn the main burners, to completely shut it off, the igniter unit including the ignitor located on the panel of the igniter unit, provided with a bimetallic plate, which is a sensing element of the flame sensor, and is connected by a pulse tube and a pilot tube to a shut-off valve, wherein said shut-off valve The atrium contains a supravalvular cavity, which communicates with the igniter via a pilot tube, a middle cavity separated from the aforementioned supravalvular cavity by a wall and a saddle, on which a valve closes, connected to a spring-loaded stem rigidly connected to a small membrane, with the formation of a spring-membrane mechanism, moreover, a small membrane is mounted above a large membrane fixed on the lower side of the safety unit with a lower cover, forming a lower sub-membrane between the large membrane and the lower cover a cavity, which through said impulse tubes communicates with said flame and traction sensors, said exit cavity being connected via said channel with a throttle to said lower submembrane cavity, the automatics being able to control the closing of the shut-off valve when the pressure drops below the minimum operating value or short-term shutdown of the gas supply by means of the said spring-membrane mechanism, which provides regulation of the difference in the areas of the large and small memes wounds of the shutoff valve, while on the top cover of the shutoff valve, a hole is made that communicates with the hole in the igniter tube, in which an adjustment needle is installed, configured to control the gas flow on said igniter by changing the position of the adjustment needle relative to the hole in the ignition tube, s providing improved fire connection of the igniter with the main burners of the gas burner device due to the flow of flame accelerating along the channel of the said igniter block. 2. Safety automatics of gas-using devices according to claim 1, characterized in that a gate is arranged in the lower part of the furnace, which is configured to adjust secondary air.

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