RU2706885C1 - Multi-block gas - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: invention relates to heat engineering and can be used for ignition, load control and disconnection of gas burners of heat generating plants. Multi-unit gas comprises interconnected means of shutting off gas supply and gas supply means to ignitor. Gas supply shutoff means is a double electromagnetic valve having a housing, inside which the first seat is arranged, first membrane gate with unloading opening, first membrane with bypass holes, arranged between housing flange and its cover, first slide valve is arranged to overlap/open discharge opening of first membrane gate, connected to first electromagnet armature and to first membrane gate. On the housing gas supply means and gas outlet means are fixed. Gas outlet means is made in the form of a pipeline rigidly fixed in the housing wall, the first end extending beyond the housing. Additionally, there are arranged inside housing second seat, second membrane gate valve with unloading opening, second membrane with bypass holes, arranged between housing flange and its cover, second slide is arranged to overlap/open discharge opening of second membrane gate, connected to second electromagnet armature and to second membrane gate. First gas duct is located between gas supply means and second membrane gate, wherein membrane of first gate is installed with possibility of gas pipeline shutoff. Volume of the housing is divided by a partition into two parts, the first of which is located under the membrane of the first gate, and the second part is located under the membrane of the second gate, at that said second gate is arranged to discharge gas into gas outlet, at that gas outlet means adjoins second diaphragm shutter.

EFFECT: simplified design.

9 cl, 2 dwg

Description

The invention relates to the field of power engineering and can be used for ignition, load regulation and shutdown of gas burner devices of heat generating plants.

Known (RU, patent 90878, publ. 20.01.2010) automatic gas block for a group of burners of thermal installations, containing a supply gas pipe on which a first safety shut-off valve is installed, a gas bypass installed parallel to the first safety shut-off valve and on which are sequentially installed pressure test valve and throttle, while the pilot gas pipeline with the pilot valve and the safety gas pipeline with the safety valve have a common connection point with the supply and bypass gas pipelines. In addition, the unit contains a control unit, two selected three-way valves that are connected to a common gas connection point, and a collector with N taps to N working torches and a pilot tap, which are connected to the corresponding burners through the second safety shut-off valves, and after the second safety - a shut-off valve is installed on the kindling tap, and a throttle valve is installed, and the manifold is cut into the supply gas pipeline.

The disadvantage of this block should be recognized as the complexity of its design.

Also known (RU, patent 103602, publ. 04/20/2011) the gas equipment block of a gas burner device of a developed design contains a collector on which an inlet shut-off valve and at least two outlet shut-off valves installed with the possibility of supplying gas to the burner are installed, after one of which a throttle valve is installed, and for connecting the inlet shut-off valve to the gas pipe, a pipe with the first fitting and the first ball valve is used, on the inlet shut-off valve The first comb connecting the inlet cavity of this valve with the internal volume between the inlet and outlet shut-off valves has been updated, this comb is equipped with a second spherical valve, a first solenoid valve, a throttle and a pressure gauge valve, a second fitting is connected to the manifold, with the third and fourth ball valves connected taps and a second solenoid valve for gas supply to the igniter, while the third solenoid valve is connected to the internal volume between the input and output one shut-off valve with the possibility of attaching a safety gas pipeline, each shut-off valve comprising a housing with means for introducing and discharging a gas medium, a plate connected to a rod arranged to move by means of a drive located in the housing with the ability to shut off the flow, the drive comprising a lever, at one end of which an electromagnet and an electromagnetic time switch are installed, the lever in the middle part is made with the possibility of connection by means of an adjustable rod to the stem Apana, on the basis of the drive, an additional magnetic starter is mounted, configured to receive a control signal and installed with the possibility of turning on an electromagnet and an electromagnetic time switch, and means for connecting the drive to an electric current network. The block may contain two, three or four outlet shut-off valves installed with the possibility of supplying gas to the burner.

The unit is designed for operation of a group of burners of PTVM-type boilers for gaseous fuel and performs the following functions: providing automatic crimping of its locking devices; ensuring safe ignition of a group of burners; gas cut-off to a group of burners in case of violation of the technological parameters of the boiler; gas cut-off when the torch of a kindling burner is extinguished as part of a group.

The disadvantage of this block should be recognized as the complexity of its design.

The closest analogue of the developed device can be recognized (RU, patent 103390, publ. 04/10/2011) a gas equipment unit of a gas burner device, characterized in that it contains a gas pipeline connected in series with each other using flange connections, the first and second shut-off valves, and an electric throttle valve , a comb is installed on the first shut-off valve connecting the inlet cavity of this valve with an internal volume between the first and second shut-off valves, said comb is equipped with a by a ball valve, an electromagnetic valve, a throttle valve and a second ball valve, the electromagnetic valve is connected to the comb with the possibility of supplying gas to the igniter, the electromagnetic valve connected to the internal volume between the first and second shut-off valves is configured to connect a safety gas pipeline, while to the comb at least one valve and one fitting for test equipment and / or sampling are additionally connected, behind the second shut-off valve on the gas pipeline after the throttle valve, a sampling device with a ball valve for connecting the instrumentation combs with installation of valves for instrumentation and / or sampling, each shut-off valve comprising a housing with gas inlet and outlet means; connected to a rod movable by means of a drive, the drive comprising a lever, at one end of which an electromagnet and an electromagnetic time relay are installed, a lever the middle part is connectable through an adjustable thrust to the stem of the valve, on the basis of the drive are mounted magnetic switch further operable to receive the control signal and arranged for including the electromagnetic solenoid and timer, and means for driving connection to the electric mains.

The known device operates as follows.

Before igniting the burner, the shut-off valves must be closed and the solenoid valve open. During the initial and repeated ignitions of the ignited burner, the gas fittings of the units must be crimped in full or in a shortened version. The throttle and air gate of the ignition burner must be closed. The closed state of the throttle valve will provide the required gas pressure in front of the burner during ignition. After crimping the shutoff valves of the unit, the first shut-off valve is opened along the gas, for which a voltage of 220 V is supplied to the valve's electrical circuit. At the same time, the valve must be fully opened no more than 70 s. After opening the shut-off valve, a voltage of 220 V is supplied to the ignition transformer to ignite the igniter from the spark. The turn-on time of the transformer should be no more than 15 s. Immediately after supplying the spark, the gas supply valve to the ignitor must be opened, for which a voltage of 220 V is applied to its electromagnet. After confirmation of the presence of the pilot flame, the second shut-off valve is opened along the gas, for which a voltage of 220 V is supplied to the valve’s electrical circuit. 25 from the moment the shut-off valve starts to open, the presence of the burner torch must be established and the pilot valve turned off in accordance with the requirements of the burner ignition process. Then, the gas-to-air ratio control for the fired burner should be turned on (performed by the control system). The gas throttle must be open before the limit switch of the throttle actuator electric actuator trips, to the position corresponding to the working gas pressure 'in front of the burner. The necessary air pressure in front of the burner for the current gas pressure must be worked out remotely through the air gate control tool or automatically by the gas-air ratio regulator. A control of the gas and air pressure in front of the burner must be installed.

A disadvantage of the known device should recognize its complexity.

The technical problem to be solved using the developed device is to expand the range of gas burner devices of heat generating plants.

The technical result achieved by the implementation of the developed device is to simplify the design.

To achieve the specified technical result, it is proposed to use a gas multiblock of a developed design. It contains in series interconnected using flange connections means for shutting off the gas supply, means for supplying gas to the igniter, the means for shutting off the gas supply being a double electromagnetic valve containing a housing inside which a first seat, a first membrane shutter with a discharge opening, and a first membrane are placed with bypass holes located between the housing flange and its cover, the first spool installed with the possibility of overlapping / opening unloading full-time openings of the first membrane shutter connected to the armature of the first electromagnet and the first membrane shutter, gas supply means and gas outlet means are fixed to the housing, the gas outlet means being made in the form of a pipeline rigidly fixed in the wall of the housing, the first end face extending outside the housing, in addition, it further comprises a second seat located inside the housing, a second membrane shutter with a discharge opening, a second membrane with bypass holes and a housing located between the flange CA and its cover, a second spool installed with the possibility of overlapping / opening the discharge opening of the second membrane shutter, connected to the armature of the second electromagnet and to the second membrane shutter, the first gas duct located between the gas supply means and the second membrane shutter, the membrane of the first shutter installed with the possibility of overlapping the gas duct, the body volume is divided by a partition into two parts, the first of which is located under the membrane of the first shutter, and the second part is located under the membranes th second gate, the second gate arranged to output a gas to the gas outlet means, wherein the gas outlet means adjacent the second end to the second diaphragm valves.

After the electromagnetic double valve, an electric throttle can be additionally installed.

.. In some embodiments of the developed device, the means for supplying gas to the igniter is a normally closed solenoid valve.

In some embodiments of the developed device, the electromagnetic double-valve gates are installed at the ends of the housing, and the gas supply means and gas outlet means are located on opposite sides of the housing. However, an implementation option is not ruled out when the first shutter of the electromagnetic double valve is installed on the end of the housing, gas outlet means are installed on the second end of the housing, the gas supply means and the second shutter are located on opposite sides of the housing.

Preferably, the electromagnetic double valve gates are mounted on its housing using flange connections. Although the possibility of using other types of compounds is not excluded.

Advantageously, the electromagnetic double valve body is cylindrical.

The solenoid valve double spool, installed with the possibility of overlapping / opening the discharge opening of the membrane shutter, can be connected to the armature of the electromagnet and the membrane shutter rigidly, telescopically or spring.

In some embodiments, the first and second shutters of the electromagnetic double valve are configured to slowly open.

The graphic material shows embodiments of an electromagnetic double valve, and in FIG. 1 shows an embodiment of the developed device, in which both shutters are located at the ends of the housing, and in FIG. 2 - an option when the first shutter is installed on the end of the housing, gas outlet means are installed on the second end of the housing, the gas supply means and the second shutter are located on opposite sides of the housing. The following notation is used on the graphic material: body 1, first seat 2, first membrane shutter 3 with discharge hole 4, first membrane 5 with bypass holes 6, first flange 7 of body 1 with cover 8, first spool 9, anchor 10 and coil 11 of the first electromagnet, gas supply means 12, gas outlet means 13, second seat 14, second membrane shutter 15 with discharge opening 16, second membrane 17 with bypass openings 18, second spool 19, armature 20 and coil 21 of the second electromagnet, second flange 22 of housing 1 with cr knob 23, gas duct 24, partition 25.

Multiblock gas developed design works as follows.

Before igniting the burner, the shutters of the solenoid double valve must be closed and the solenoid valve for supplying natural gas to the burner open. During the initial and repeated ignitions of the ignited burner, the tightness (pressure testing) of the gas valve of the multiblock must be carried out in full or reduced version. The throttle and air gate of the ignition burner must be closed. The closed state of the throttle valve will provide the required gas pressure in front of the burner during ignition. After tightness control of the multiblock shutoff valves, the first electromagnetic double valve shutter is opened along the gas, for which a voltage of 220 V is applied to the electric circuit of the drive of the first electromagnetic double valve shutter. After opening the first valve shutter, a voltage of 220 V is applied to the ignition transformer to ignite the spark igniter . Immediately after supplying the spark, the electromagnetic valve for supplying gas to the igniter must be opened, for which a voltage of 220 V is applied to its electromagnet. After confirmation of the presence of the pilot flame, the second shutter of the electromagnetic double valve is opened along the gas, for which voltage 220 is applied to the electric circuit of the drive of the second valve B. After opening the second shutter of the double solenoid valve, the presence of the torch torch must be established and the ignition valve turned off in accordance with the requirements burner ignition process. Then the gas-to-air ratio control for the fired burner should be enabled (performed by the control system). The gas throttle must be open before the limit switch of the throttle actuator electric actuator trips, to the position corresponding to the working gas pressure in front of the burner. The necessary air pressure in front of the burner for the current gas pressure must be worked out remotely through the air gate control tool or automatically by the gas-air ratio regulator. A control of the gas and air pressure in front of the burner must be installed.

Simplification of the design is achieved by eliminating solenoid valves from the known design.

Claims (9)

1. The gas multiblock, comprising in series interconnected means for shutting off the gas supply and means for supplying gas to the igniter, characterized in that the means for shutting off the gas supply is a double electromagnetic valve containing a housing inside which a first seat, a first membrane shutter with a discharge opening are placed , the first diaphragm with bypass holes located between the housing flange and its cover, the first spool installed with the possibility of overlapping / opening unloading a hole of the first membrane shutter connected to the armature of the first electromagnet and the first membrane shutter, gas supply means and a gas outlet means are fixed to the housing, the gas outlet means being made in the form of a pipeline rigidly fixed in the wall of the housing, the first end face extending outside the housing, in addition, it further comprises a second seat located inside the housing, a second membrane shutter with a discharge opening, a second membrane with bypass holes located between the housing flange and its cover, a second spool installed with the possibility of overlapping / opening the discharge opening of the second membrane valve, connected to the armature of the second electromagnet and the second membrane valve, the first gas duct located between the gas supply means and the second membrane valve, the membrane of the first valve being installed with the possibility gas duct overlap, the body volume is divided by a partition into two parts, the first of which is located under the membrane of the first shutter, and the second part is located under the membrane the second shutter, while the second shutter is located with the possibility of gas outlet to the gas outlet means, while the gas outlet means with the second end abuts against the second membrane shutter. 2. The gas multiblock according to claim 1, characterized in that after the electromagnetic double valve, an additional electric throttle is installed. 3. The gas multiblock according to claim 1, characterized in that the means for supplying gas to the igniter is a normally closed solenoid valve. 4. Multiblock gas p. 1, characterized in that the valves of the electromagnetic double valve are installed on the ends of the housing, and the gas supply and gas outlet means are located on opposite sides of the housing. 5. A gas multiblock according to claim 1, characterized in that the first shutter of the electromagnetic double valve is installed on the end of the housing, a gas outlet means is installed on the second end of the housing, the gas supply means and the second shutter are located on opposite sides of the housing. 6. The gas multiblock according to claim 1, characterized in that the electromagnetic double valve gates are mounted on its body using flange connections. 7. The gas multiblock according to claim 1, characterized in that the valve body of the electromagnetic double is cylindrical. 8. The gas multiblock according to claim 1, characterized in that the solenoid valve double solenoid valve, installed with the possibility of closing / opening the discharge opening of the membrane shutter, is connected to the armature of the electromagnet and to the membrane shutter rigidly, telescopically or by a spring. 9. The gas multiblock according to claim 1, characterized in that the first and second valves of the electromagnetic double valve are made with the possibility of slow opening.

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