CN105066238B - Safety-type double-gas-source gas control system and control method - Google Patents
Safety-type double-gas-source gas control system and control method Download PDFInfo
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- CN105066238B CN105066238B CN201510505181.8A CN201510505181A CN105066238B CN 105066238 B CN105066238 B CN 105066238B CN 201510505181 A CN201510505181 A CN 201510505181A CN 105066238 B CN105066238 B CN 105066238B
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Abstract
The invention discloses a safety-type double-gas-source gas control system and control method. The control system comprises a high heating value gas firing device, a low heating value gas firing device and an on-off controlling valve used for controlling on or off of a gas circuit. The high heating value gas firing device and the low heating value gas firing device each comprise an ignition needle, a thermocouple and ejecting pipes suitable for high heating value gas and low heating value gas respectively, and the positive electrodes and the negative electrodes of the two thermocouples are in series connection in a reverse manner to be in tandem connection with a magnetic valve of the on-off controlling valve. According to the gas control system, due to the fact that the two thermocouples of the high heating value gas firing device and the low heating value gas firing device are in series connection in the reverse manner and are in tandem connection with the magnetic valve of the on-off controlling valve at the same time, in the ignition period, on or off of the on-off controlling valve is controlled through the condition whether the effective thermoelectric force is generated by the thermocouples or not, the dangerous condition that a high frame is generated by a main burner due to the misoperation of a gas appliance is prevented, and the safe utilization is guaranteed.
Description
Technical field
The present invention relates to warmer technical field of burning, more particularly to a kind of safety-type double-source gas control system and control
Method processed.
Background technology
Have various gas to supply on the market at present, such as liquefied gas, natural gas etc., corresponding gas utensil be also classified into liquefied gas,
Natural gas etc., because characteristic difference (such as calorific value etc.) of various combustion gas, makes using the gas nozzle bore of fuel gas with low heat value is relative
Gas utensil with high heating value combustion gas is larger, so when fuel gas with low heat value (such as natural gas gas) nozzle mistake introduces the combustion of high heating value
Gas is (such as：LNG gasifaction) when, the flame produced by gas utensil can be very high, then can produce danger.
The content of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, there is provided a kind of safety-type double-source gas control system
And control method, the gas control system is by two thermocouple differential concatenations in high and low calorific value fuel gas firing device and same
When concatenate with the magnetic valve in switching control pilot, whether effective thermoelectrical potential is produced come controlling switch by thermocouple during lighting a fire
Control valve on or off, prevents gas utensil from the dangerous situation for causing main burner to produce high flame due to maloperation occur,
Safe handling is ensured.
The technical scheme is that what is be achieved in that：
A kind of safety-type double-source gas control system, including low heat value pressure maintaining valve, high heating value pressure maintaining valve and：
Switching control pilot, for controlling gas path on-off, which connects low heat value pressure maintaining valve, high heating value pressure maintaining valve respectively, described
Switching control pilot has two gas circuit outputs, is the gas that ignites all the way, is the main gas circuit towards main burner in addition all the way, ignites gas again
High heating value gas ignition device or fuel gas with low heat value firing device are led in Jing gear switches；
High and low calorific value fuel gas firing device each includes an ignition electrode, a thermocouple and adapts to high and low calorific value fuel gas respectively
Each induction tunnel, concatenate with the magnetic valve in switching control pilot after wherein two thermocouple both positive and negative polarity differential concatenations；Two hot
The position of galvanic couple arranges the flame of induction tunnel when the system of causing correctly introduces combustion gas and only heats corresponding thermocouple to produce potential
It is held on the magnetic valve adhesive of switching control pilot, and works as system mistake high heating value combustion gas introducing fuel gas with low heat value is ignited
During device, flame is while heated to two thermocouples are so that potential is offset so that switching control pilot is held off.Potential is offset
When be equal to potential-free generation, also cannot just make the magnetic valve adhesive of switching control pilot, so that switching control pilot keeps initial
Closure off state.
Preferably, concatenate with the magnetic valve in switching control pilot after two thermocouple both positive and negative polarity differential concatenations referring to：Two
The positive pole of individual thermocouple is mutually concatenated, and two negative poles are drawn and concatenated with the magnetic valve in switching control pilot；Or two thermocouples
Capacitors connect, and two positive poles are drawn and concatenated with the magnetic valve in switching control pilot.
Preferably, being provided with air window in the induction tunnel of the fuel gas with low heat value firing device and just to the setting of air window
Gas nozzle, when combustion gas is sprayed by gas nozzle, air window can produce negative-pressure ejecting and enter a certain amount of air and draw with combustion gas
Penetrate in pipe and sprayed by the spout on induction tunnel after mixing, Jing ignition electrodes are lighted after-combustion and form pilot flame.
Preferably, main gas circuit enters main burner through adjustable nozzle and burns in its surface ignition, adjustable nozzle
Effective admission sectional area is by the gas kind converter control for adjusting high and low calorific value fuel gas firing device gear switch.Adjustable nozzle
It is linked with the gas kind converter for controlling high and low calorific value fuel gas firing device gear switch, gas kind converter is adjusted to difference
During gear, adjustable nozzle is automatically adjusted again and obtains corresponding effective admission sectional area, killed two birds with one stone.If the combustion gas of high heating value
Then reduce the effective admission sectional area of nozzle, if low-calorie combustion gas, then increase the effective admission sectional area of nozzle, so as to
Maintain the rated power of main burner.
Preferably, the gas kind converter includes：
Valve body, valve body periphery are provided with low heat value firing device gas outlet, high heating value firing device gas outlet, firing device
Gas circuit air inlet and primary air inlet, are provided with the valve element that a periphery is concavely provided with notch in valve body, valve element action causes notch to connect
Low heat value firing device gas outlet and firing device gas circuit air inlet or connect high heating value firing device gas outlet and dress of igniting
Put gas circuit air inlet；
Adjustable nozzle, is connected with primary air inlet, and which is arranged on the valve body lower end, and adjustable nozzle lower end is provided with jet hole；
Valve seat, which is fixedly installed on to slide in valve body upper end, valve seat and is equipped with upper valve rod, and upper valve rod upper end is exposed to valve seat
Outward, upper valve rod lower end is connected with lower valve rod, and lower valve rod is explored downward at the jet hole through valve element；Being provided with valve seat makes upper valve rod
The spring of reset, upper valve rod are moved down and with movable valve plug action so as to carry out the firing device gas of high heating value combustion gas and fuel gas with low heat value
Road switches, while lower valve rod is synchronized with the movement with upper valve rod and is engaged with jet hole, so as to have adjusted the high and low heat of jet hole correspondence
Effective admission sectional area needed for value combustion gas.
Preferably, valve element, valve body band are tapered, lower valve rod is slidably matched with valve element, valve element upper surface be provided with one of
Body formed housing, spring housing is on upper valve rod and is arranged in housing, is provided with boss, spring upper and lower ends point on upper valve rod
Do not offset with boss, valve element, on housing, be provided with the linkage notch being engaged with boss, be provided with one high and one low and wrong inside valve seat
Low, the high heating value combustion gas gear groove put is opened up, upper valve rod is moved down makes boss snap in linkage notch while rotating upper valve rod drives valve
Core rotation switches so as to the firing device gas circuit for carrying out high and low calorific value fuel gas, and boss is snapped under corresponding gear groove realization
The positioning of valve rod.Valve element band is tapered to be made which and is arranged in valve body with axial restraint, the mode of circumferentially rotating, valve element and valve interior wall
Between keep hermetic seal, valve element abutting positioning is allowed to keep hermetic seal between valve body by spring by elastic force, and spring gives upper
The movement of valve rod provides restoring force.Upper valve rod is moved down and rotated makes valve element adjust different gears, while the boss on upper valve rod
The positioning that corresponding gear groove realizes lower valve rod is snapped in again, is designed ingenious, is taken into account regulation again while adjusting firing device gear
The effective admission sectional area of main burner, kills two birds with one stone.
Preferably, the notch cross section is arc, low heat value firing device gas outlet and high heating value firing device go out
On the same line, firing device gas circuit air inlet is located at the vertical of straight line residing for high and low calorific value firing device gas outlet to gas port
Direction.Notch cross section is preferably 90 degree of sector, by such setting so that 90 degree of Spool rotating can make dress of igniting
Put gas circuit air inlet to communicate with high and low calorific value firing device gas outlet respectively.
Preferably, valve element is slided up and down being arranged in valve body, lower valve rod is fixedly connected with valve element, and low, high heating value is ignited
Device gas outlet is to arrange along center spool axis direction with firing device gas circuit air inlet, and firing device gas circuit air inlet sets
Put between low, high heating value firing device gas outlet；Valve body upper end is shrunk to a saddle, is provided with boss, spring on upper valve rod
It is enclosed within upper valve rod and spring upper and lower ends is offseted with saddle, boss respectively, is provided with one high and one low inside valve seat and staggers and set
Low, the high heating value combustion gas gear groove put, upper valve rod is moved down makes lower valve rod, valve spool so as to carry out drawing for high and low calorific value fuel gas
The switching of fiery device gas circuit, and upper valve rod rotation makes boss correspondingly snap in different gear grooves to realize determining for lower valve rod and valve element
Position.This kind of mode causes valve element to realize gear switch in a sliding manner along the direction of upper and lower valve rod axis, and the opening of notch
Size again cause upper valve rod rotate to different gear grooves positioned when, do not interfere with the inlet, outlet of gas circuit.
Preferably, the lower valve rod lower end is taper, during low heat value gear, lower valve rod lower end departs from jet hole, hyperpyrexia
During value gear, the effective admission sectional area of jet hole is changed in lower valve rod lower end insertion jet hole.In this kind of mode,
Jet hole is single pore, and the tapered portion of lower valve rod lower end is entered at jet hole, makes jet hole be circular air inlet by cross section
Mouth is changed into annular air scoop, so as to reach the purpose for adjusting effective admission sectional area.
Preferably, the lower valve rod lower end is cylinder, caliber size of the lower valve rod lower end diameter less than jet hole is low
During calorific value gear, lower valve rod lower end departs from jet hole；During high heating value gear, lower valve rod lower end insertion jet hole so that jet hole
Effective admission sectional area change.In this kind of mode, jet hole is single pore, and lower valve rod lower end is cylindrical
Shape, cylinder enter jet hole, can equally make jet hole be that circular air inlet is changed into annular air scoop from cross section, so as to reach
The purpose for adjusting effective admission sectional area is arrived.
Preferably, the lower valve rod lower end is cylinder, multiple pores at jet hole, are provided with, lower valve rod lower end is cased with O
Shape sealing ring, during low heat value gear, lower valve rod separately makes all pores keep insertion with jet hole；And during high heating value gear, under
Valve rod is moved down makes lower valve rod lower end block a wherein pore so that the effective admission sectional area of jet hole changes.This side
In formula, multiple pores at jet hole, are provided with, the such as main pore by middle and the secondary pore around main gas cell distribution are constituted, under
When valve rod is moved down, the cylinder of lower end blocks main pore, and is held on time pore, and equally having reached regulation in this way has
The purpose of effect air inlet sectional area.
Preferably, the lower valve rod lower end is taper, multiple pores at jet hole, are provided with, during low heat value gear, lower valve
Bar separately makes all pores keep insertion with jet hole, and during high heating value gear, lower valve rod is moved down makes lower valve rod lower end block which
In a pore so that the effective admission sectional area of jet hole changes.It is similar with a kind of upper mode, only lower valve rod
Lower end is designed as taper, can effectively eliminate the gap error between cylinder and pore.
Preferably, lower valve rod bottom is shrunk to a push rod, push rod upper end is fixed with a back-up ring, push rod lower end movable sleeve
A sealing gasket is provided with, spring is arranged with push rod, spring upper and lower ends are offseted with back-up ring, sealing gasket respectively, set at jet hole
There are multiple pores, during low heat value gear, shipper pole dynamic sealing pad departs from jet hole on lower valve rod makes all pores keep insertion；Hyperpyrexia
During value gear, lower valve rod is moved down makes spring that sealing gasket is pressed at corresponding pore, so as to reduce the effective admission of jet hole
Sectional area.By this mode so that sealing gasket is against at corresponding pore, and spring is compressed to sealing gasket, anti-leak-stopping
Gas, it is ensured that sealing.
A kind of control method based on above-mentioned control system, including：
When system correctly introduces combustion gas, corresponding thermocouple is only heated, the potential that thermocouple is produced makes switching control pilot
In magnetic valve adhesive so that gas circuit conducting；
When fuel gas with low heat value is introduced high heating value gas ignition device by system mistake, induction tunnel cannot be lighted, thermoelectricity
Even potential-free is produced, it is impossible to make the magnetic valve adhesive in switching control pilot, gas circuit shut-off；
When high heating value combustion gas is introduced fuel gas with low heat value firing device by system mistake, fuel gas with low heat value ignition device
Induction tunnel jets out flames can be abnormal elongated, while heating two thermocouples, two thermocouples can produce electromotive force simultaneously and offset
Disappear, cannot also make the magnetic valve adhesive in switching control pilot, gas circuit shut-off.
The design philosophy and beneficial effect for employing the present invention of above-mentioned technical proposal be：
The invention provides a kind of safety-type double-source gas control system and control method, the gas control system passes through
Two thermocouple differential concatenations in high and low calorific value fuel gas firing device are simultaneously concatenated with the magnetic valve in switching control pilot simultaneously,
Valve on or off is controlled by whether thermocouple produces effective thermoelectrical potential come controlling switch during lighting a fire, prevent gas utensil from going out
Now cause due to maloperation main burner to produce the dangerous situation of high flame, ensure safe handling.
Specifically, in high and low calorific value fuel gas firing device, the nozzle bore size of induction tunnel is different, each respectively
High and low combustion gas is adapted to, when system correctly introduces combustion gas, corresponding thermocouple is only heated, the potential that thermocouple is produced makes out
The magnetic valve adhesive in control valve is closed, so that gas circuit conducting；When fuel gas with low heat value is introduced high heating value combustion gas by system mistake
During firing device, fuel gas with low heat value can introduce excessive air via the induction tunnel of high heating value gas ignition device, more than low-heat
The air-fuel ratio lighted of value combustion gas, it is impossible to light, thermocouple are also produced with regard to potential-free, it is impossible to make the electromagnetism in switching control pilot
Valve adhesive, gas circuit shut-off；When high heating value combustion gas is introduced fuel gas with low heat value firing device by system mistake, as low heat value is fired
The nozzle of the induction tunnel in gas firing device is designed according to fuel gas with low heat value (such as natural gas), thus nozzle bore compared with
Greatly, and high heating value gaseous-pressure is larger, so allowing for the induction tunnel of fuel gas with low heat value ignition device, jet out flames can be abnormal
Elongated, while heating two thermocouples, two thermocouples can produce electromotive force simultaneously and offset, and cannot also make switching control pilot
In magnetic valve adhesive, gas circuit shut-off.
Further say, while the flame ignition main burner that the present invention is sprayed by induction tunnel, heat corresponding heat again
Galvanic couple, controls the magnetic valve whether adhesive of valve by the effective electromotive force that thermocouple is produced, when system is correctly introduced come controlling switch
During combustion gas, the flame of induction tunnel is changed into ever-burning flame, and the corresponding thermocouple of meeting continuous heating, the potential which persistently produces control can switch
The magnetic valve of valve processed continues adhesive and keeps valve conducting, therefore without the need for again to switching control pilot in addition to ignition module needs battery
External power supply increases battery to be controlled magnetic valve, such that it is able to effectively save electric energy, eliminates looking back for user
Sorrow.
Description of the drawings
Fig. 1 is the general structure schematic diagram of control system of the present invention in embodiment 1；
Fig. 2 is the connection equivalent circuit diagram of two thermocouples and magnetic valve in switching control pilot；
Fig. 3 is the equivalent circuit diagram of two thermocouples and another type of attachment of magnetic valve in switching control pilot；
Fig. 4 is control system gear switch to schematic diagram during fuel gas with low heat value firing device；
Fig. 5 is control system gear switch to schematic diagram during high calorific value fuel gas firing device；
Fig. 6 is the mounting structure schematic diagram of high and low calorific value fuel gas firing device；
Fig. 7 is the internal structure schematic diagram of induction tunnel in fuel gas with low heat value firing device；
A portion enlarged drawings of the Fig. 8 for Fig. 7；
State diagram when Fig. 9 correctly introduces combustion gas for system, when high heating value gas ignition device burns；
Equivalent circuit diagrams of the Figure 10 for Fig. 9；
State diagram when Figure 11 correctly introduces combustion gas for system, when fuel gas with low heat value firing device burns；
Equivalent circuit diagrams of the Figure 12 for Figure 11；
When high heating value combustion gas is introduced fuel gas with low heat value firing device for system mistake by Figure 13, fuel gas with low heat value is ignited dress
Put state diagram during burning；
Equivalent circuit diagrams of the Figure 14 for Figure 13；
Figure 15 is the dimensional structure diagram of gas kind converter；
Figure 16 is the planar structure schematic diagram of gas kind converter；
A-A sectional views of the Figure 17 for Figure 16；
B-B sectional views of the Figure 18 for Figure 16；
Figure 19 is the dimensional structure diagram of another angle of gas kind converter；
Figure 20 is the fit structure schematic diagram of upper valve rod and valve element；
Overlooking the structure diagrams of the Figure 21 for Figure 16；
Dimensional structure diagrams of the Figure 22 for valve gap；
Internal structure schematic diagrams of the Figure 23 for valve gap；
Schematic diagram when Figure 24 is the boss screw-in high heating value combustion gas gear groove on upper valve rod；
Schematic diagram when Figure 25 is the boss screw-in high heating value combustion gas gear groove on upper valve rod；
Figure 26,27 be embodiment 1 in lower valve rod and jet hole fit structure schematic diagram；
Figure 28,29 be embodiment 2 in lower valve rod and jet hole fit structure schematic diagram；
Figure 30,31 be embodiment 3 in lower valve rod and jet hole fit structure schematic diagram；
Figure 32,33 be embodiment 4 in lower valve rod and jet hole fit structure schematic diagram；
Figure 34,35 be embodiment 5 in lower valve rod and jet hole fit structure schematic diagram；
Figure 36,37 are that valve element switches to fuel gas with low heat value firing device gear and high heating value combustion gas is drawn respectively in embodiment 6
The schematic diagram of fiery device gear.
Specific embodiment
The specific embodiment of the present invention is as follows：
Embodiment：A kind of safety-type double-source gas control system, as shown in Fig. 1～27, including low heat value pressure maintaining valve 1,
High heating value pressure maintaining valve 2 and：
Switching control pilot 3, is used for controlling gas path on-off as gas circuit master switch, and which connects low heat value pressure maintaining valve 1, height respectively
Calorific value pressure maintaining valve 2, the switching control pilot 3 have two gas circuit outputs, are gas gas circuit 6 of igniting all the way, are towards master in addition all the way
The main gas circuit 5 of burner 4, high heating value gas ignition device 7 or fuel gas with low heat value are led in Jing gear switches again on Qi Zhe roads of igniting
Firing device 8；
High and low calorific value fuel gas firing device 7,8 is each fitted including an ignition electrode 9a, 9b, thermocouple 10a, a 10b and respectively
Answer each an induction tunnel 11a, 11b of high and low calorific value fuel gas, wherein two thermocouples 10a, 10b by wire differential concatenation, and together
When concatenate with the magnetic valve in switching control pilot 3；The position of two thermocouples 10a, 10b arranges the system of causing and correctly introduces combustion gas
When induction tunnel flame only heat corresponding thermocouple and be held on the magnetic valve adhesive of switching control pilot to produce potential, and
When system mistake by high heating value combustion gas introduce fuel gas with low heat value firing device when, flame while heated to two thermocouples so that
Potential is offset so that switching control pilot is held off；
IGC Module (not shown), the battery being connected by wire with button ignition switch including button ignition switch and respectively
Box, pulse igniter, power supply of the battery case for pulse igniter, pulse igniter are connected with two ignition electrode 9a, 9b.
As shown in Figure 2 and Figure 3, two thermocouples 10a, 10b by wire differential concatenation and simultaneously with switching control pilot 3 in
Magnetic valve concatenation refer to：The positive pole of two thermocouples is mutually concatenated, and two negative poles are drawn and the magnetic valve string in switching control pilot
Connect；Or the capacitors of two thermocouples connect, two positive poles are drawn and are concatenated with the magnetic valve in switching control pilot.
As shown in fig. 6, high and low calorific value fuel gas firing device 7,8 is fixed on a bearing 12 jointly, the fuel gas with low heat value
Air window 13 and the gas nozzle 14 for just arranging to air window 13 is provided with the induction tunnel 11b of firing device, and combustion gas passes through combustion gas
When nozzle 14 sprays, air window 13 can produce negative-pressure ejecting and enter
The spout crossed on induction tunnel sprays, and Jing ignition electrodes are lighted after-combustion and form pilot flame.
As shown in figure 1, main gas circuit 5 enters main burner 4 through adjustable nozzle 15 and burns in its surface ignition, adjustable spray
The effective admission sectional area of mouth 15 is controlled by the gas kind converter 16 of the high and low calorific value fuel gas firing device 7 of a regulation, 8 gear switches
System.
Specifically, as shown in Figure 15～25, the description of gas kind converter is described according to the state of vertical display
, shown gas kind converter 16 includes：
Valve body 17,17 periphery of valve body be provided with low heat value firing device gas outlet 18, high heating value firing device gas outlet 19,
Firing device gas circuit air inlet 20 and primary air inlet 21, are provided with the valve element 23 that a periphery is concavely provided with notch 22, institute in valve body 17
It is arc to state 22 cross section of notch, and low heat value firing device gas outlet 18 and high heating value firing device gas outlet 19 are in same straight line
On, firing device gas circuit air inlet 20 is located at the vertical direction of straight line residing for high and low calorific value firing device gas outlet 18,19, and
Primary air inlet 21 and high and low calorific value firing device gas outlet 18,19 are staggered setting up and down in 17 short transverse of valve body；Valve element 23 is made
Spinning movement causes the connection low heat value firing device of notch 22 gas outlet 18 to draw with low heat value firing device gas outlet 18, high heating value
Fiery device gas outlet is staggered about 19 setting, firing device gas circuit air inlet 20 or connection high heating value firing device gas outlet 19
With firing device gas circuit air inlet 20；
Adjustable nozzle 15, is connected with primary air inlet 21, and which is arranged on 17 lower end of the valve body, and 15 lower end of adjustable nozzle is provided with
Jet hole 24；
Valve seat 25, which is fixedly installed on 17 upper end of valve body by way of riveting or screw connection, slides and wear in valve seat 25
Upper valve rod 26 is provided with, 26 upper end of upper valve rod is exposed to outside valve seat 25, and 26 lower end of upper valve rod is fixedly connected with lower valve rod 27, lower valve rod
27 explore downward at the jet hole 24 through valve element 23；The spring 28 for making upper valve rod 26 reset, upper valve rod 26 is provided with valve seat 25
Move down and with 23 action of movable valve plug so as to the firing device gas circuit for carrying out high heating value combustion gas and fuel gas with low heat value switches, while lower valve
Bar 27 is synchronized with the movement with upper valve rod 26 and is engaged with jet hole 24, so as to have adjusted the high and low calorific value fuel gas of the correspondence of jet hole 24
Required effective admission sectional area.
Further say, valve element 23, valve body 17 with tapered, lower valve rod 27 be slidably matched with valve element 23 and lower valve rod 27 with
Hermetic seal, 23 upper surface of valve element is kept to be provided with the housing 29 of shaping in conjunction between valve element 23, spring 28 is enclosed within upper valve rod 26
Go up and be arranged in housing 29, be provided with boss 30 on upper valve rod 26,28 upper and lower ends of spring respectively with boss 30,23 phase of valve element
Support, on housing 29, be provided with the linkage notch 31 being engaged with boss 30；As shown in Figure 22～25,25 cross section of valve seat is circle,
Be provided with low, the high heating value combustion gas gear groove 32,33 of one high and one low and setting of staggering inside valve seat 25, upper valve rod 26 move down make it is convex
Platform 30 snaps in linkage notch 31 while rotate upper valve rod 26 rotates the dress of igniting so as to carry out high and low calorific value fuel gas with movable valve plug 23
Gas circuit switching is put, and boss 30 snaps in corresponding gear groove and realizes upper valve rod 26, the positioning of lower valve rod 27.
As shown in figure 26,27 lower end of the lower valve rod is taper, and during low heat value gear, lower valve rod lower end departs from jet hole
24；As shown in figure 27, during high heating value gear, the effective admission of jet hole 24 is cut in 27 lower end of lower valve rod insertion jet hole 24
Area changes, and specifically, the air inlet cross section of jet hole 24 is changed into annular for circle, so as to reduce effective admission
Sectional area, the high heating value combustion gas higher to adapt to pressure.
Normally off of the magnetic valve of initial switch control valve in non-adhesive, when control system correctly introduces high heating value combustion
During gas, as shown in Figure 9, Figure 10, corresponding thermocouple is only heated, the corresponding thermocouple of fuel gas with low heat value firing device is in circuit
Equivalent to having concatenated a resistance, due to the resistance of this thermocouple it is smaller, so affecting very little, the thermocouple being heated by the flame
The potential of generation makes the magnetic valve adhesive in switching control pilot, so that gas circuit conducting can enable the normal work of safety control circuit
Make.
When control system correctly introduces fuel gas with low heat value, as shown in Figure 11,12, corresponding thermocouple is equally only heated,
The corresponding thermocouple of high heating value gas ignition device also corresponds to concatenate a resistance in circuit, due to the resistance of this thermocouple
Value is smaller, so affecting very little, the potential that the thermocouple being heated by the flame is produced makes the magnetic valve adhesive in switching control pilot,
So that gas circuit conducting can enable safety control circuit normally work.
It is when high heating value combustion gas is introduced fuel gas with low heat value firing device by control system mistake, as shown in Figure 13,14, low
The flame of calorific value fuel gas firing device can be abnormal elongated, and it can heat two thermocouples 9a, 9b simultaneously, and two thermocouples can be simultaneously
Electromotive force is produced, due to reversely concatenating, the electromotive force for acting on the magnetic valve in sequential circuit will be very low, is nearly identical to phase
Mutually offset, therefore magnetic valve adhesive can not be made, so as to cannot normally open gas circuit, gas utensil can not work, so that it is guaranteed that safety.
When fuel gas with low heat value is introduced high heating value gas ignition device by control system mistake, fuel gas with low heat value is via height
The induction tunnel of calorific value fuel gas firing device can introduce excessive air, more than the air-fuel ratio lighted of fuel gas with low heat value, it is impossible to
Light, thermocouple is also produced with regard to potential-free, it is impossible to make the magnetic valve adhesive in switching control pilot, gas circuit shut-off；Gas utensil is same
Can not work, it is ensured that safety.
Embodiment 2：As different from Example 1, as shown in Figure 28,29, the lower valve rod lower end is cylinder, lower valve rod
Caliber size of the lower end diameter less than jet hole, during low heat value gear, lower valve rod lower end departs from jet hole；During high heating value gear,
Insert jet hole in lower valve rod lower end so that the effective admission sectional area of jet hole changes.
Embodiment 3：As shown in Figure 30,31, in the present embodiment, 27 lower end of the lower valve rod is cylinder, sets at jet hole
There are multiple pores 35, lower valve rod lower end is cased with O-ring seals 34, during low heat value gear, lower valve rod is separately made with jet hole to be owned
Pore keeps insertion；And during high heating value gear, lower valve rod is moved down makes lower valve rod lower end block a wherein pore so that nozzle
The effective admission sectional area of mouth changes.
Embodiment 4：As shown in Figure 32,33, in the present embodiment, 27 lower end of the lower valve rod is taper, is provided with jet hole
Multiple pores 35, during low heat value gear, lower valve rod separately makes all pores keep insertion with jet hole, and during high heating value gear,
Lower valve rod is moved down makes lower valve rod lower end block a wherein pore so that the effective admission sectional area of jet hole changes.
Embodiment 5：As shown in Figure 34,35, in the present embodiment, 27 bottom of lower valve rod is shrunk to a push rod 36, on push rod 36
End is fixed with a back-up ring 37, and 36 lower end movable sleeve of push rod is provided with a sealing gasket 38, keeps gas between sealing gasket 38 and push rod 36
Sealing, is arranged with spring 28 on push rod 36, and 28 upper and lower ends of spring are offseted with back-up ring 37, sealing gasket 38 respectively, jet hole 24
Place is provided with multiple pores 35, and wherein middle pore is inwardly projecting when jet hole 24, low heat value gear, shipper pole on lower valve rod 37
Dynamic sealing pad 38 departs from jet hole makes all pores keep insertion；During high heating value gear, lower valve rod 27 is moved down makes spring seal
Pad 38 is pressed at corresponding pore, so as to reduce the effective admission sectional area of jet hole.
Embodiment 6：The present embodiment principle is substantially the same manner as Example 1, except for the difference that the structure of gas kind converter, such as schemes
36th, shown in 37, valve element 23 is slided up and down and is arranged in valve body 17, and lower valve rod 27 is fixedly connected with valve element 23, and low, high heating value is ignited
Device gas outlet 19,18 is to arrange along center spool axis direction with firing device gas circuit air inlet 20, and firing device gas circuit
Air inlet 20 is arranged between low, high heating value firing device gas outlet 19,18；17 upper end of valve body is shrunk to a saddle 39, with figure
Be similar to shown in 20, be provided with boss 30 on upper valve rod 26, spring 28 be enclosed within upper valve rod 26 and 28 upper and lower ends of spring respectively with
Saddle 39, boss 30 offset, and equally, inside valve seat, the setting of gear groove is also same as Example 1, i.e., as shown in Figure 22～25,
25 cross section of valve seat for circle, be provided with inside valve seat 25 the low of one high and one low and setting of staggering, high heating value combustion gas gear groove 32,
33, upper valve rod 26 is moved down makes boss 30 snap in linkage notch 31 while rotation upper valve rod 26 is rotated so as to carry out with movable valve plug 23
The firing device gas circuit switching of high and low calorific value fuel gas, and boss 30 snaps in corresponding gear groove and realizes upper valve rod 26, lower valve rod
27 positioning.
The control system and method for being provided to various embodiments of the present invention above is described in detail, and applies in the present invention
Specific case is set forth to the principle of the present invention and embodiment, and the explanation of above example is only intended to help and understands
The method of the present invention and its core concept；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, in tool
Will change in body embodiment and range of application, relative position that each part of such as firing device is installed changes
Become, or using an ignition electrode substituting two ignition electrodes, then or series connection after two thermocouples two leads its
In a ground connection, while one end of magnetic valve is led back from ground wire, then only with the magnetic valve in a wire connecting valve control valve
Loop is formed, and idea of the invention is that consistent.In sum, this specification content should not be construed as the limit to the present invention
System.
Claims (14)
1. a kind of safety-type double-source gas control system, it is characterized in that including low heat value pressure maintaining valve, high heating value pressure maintaining valve and：
Switching control pilot, for controlling gas path on-off, which connects low heat value pressure maintaining valve, high heating value pressure maintaining valve, the switch respectively
Control valve has two gas circuit outputs, is the gas that ignites all the way, is the main gas circuit towards main burner in addition all the way, and ignite gas and Jing shelves
Position switching is towards high heating value gas ignition device or fuel gas with low heat value firing device；
High and low calorific value fuel gas firing device each includes an ignition electrode, a thermocouple and adapts to each of high and low calorific value fuel gas respectively
One induction tunnel, is concatenated with the magnetic valve in switching control pilot after wherein two thermocouple both positive and negative polarity differential concatenations；Two thermocouples
Position arrange the system of causing when correctly introducing combustion gas the flame of induction tunnel only heat corresponding thermocouple and made out with producing potential
The magnetic valve adhesive for closing control valve is held on；And work as system mistake by high heating value combustion gas introduce fuel gas with low heat value firing device
When, flame is while heated to two thermocouples are so that potential is offset so that switching control pilot is held off；When system mistake
When fuel gas with low heat value is introduced high heating value gas ignition device, induction tunnel cannot be lighted, and thermocouple is also produced with regard to potential-free, it is impossible to
Make the magnetic valve adhesive in switching control pilot, gas circuit shut-off.
2. safety-type double-source gas control system according to claim 1, is characterized in that：Two thermocouple both positive and negative polarities are anti-
Concatenate with the magnetic valve in switching control pilot to after series connection and refer to：The positive pole of two thermocouples is mutually concatenated, two negative poles draw with
Magnetic valve concatenation in switching control pilot；Or the capacitors of two thermocouples connect, two positive poles are drawn and switching control pilot
In magnetic valve concatenation.
3. safety-type double-source gas control system according to claim 1, is characterized in that：The fuel gas with low heat value is ignited
Air window and the gas nozzle for just arranging to air window is provided with the induction tunnel of device, it is when combustion gas is sprayed by gas nozzle, empty
Transom window can produce negative-pressure ejecting and enter,
Jing ignition electrodes are lighted after-combustion and form pilot flame.
4. safety-type double-source gas control system according to claim 1, is characterized in that：Main gas circuit is through adjustable nozzle
Burn into main burner and in its surface ignition, the effective admission sectional area of adjustable nozzle adjusts high and low calorific value fuel gas by one
The gas kind converter control of firing device gear switch.
5. safety-type double-source gas control system according to claim 4, is characterized in that：The gas kind converter bag
Include：
Valve body, valve body periphery are provided with low heat value firing device gas outlet, high heating value firing device gas outlet, firing device gas circuit
Air inlet and primary air inlet, are provided with the valve element that a periphery is concavely provided with notch in valve body, valve element action causes notch connection low-heat
Value firing device gas outlet and firing device gas circuit air inlet or connect high heating value firing device gas outlet and firing device gas
Road air inlet；
Adjustable nozzle, is connected with primary air inlet, and which is arranged on the valve body lower end, and adjustable nozzle lower end is provided with jet hole；
Valve seat, which is fixedly installed on to slide in valve body upper end, valve seat and is equipped with upper valve rod, and upper valve rod upper end is exposed to outside valve seat,
Upper valve rod lower end is connected with lower valve rod, and lower valve rod is explored downward at the jet hole through valve element；Being provided with valve seat makes upper valve rod multiple
The spring of position, upper valve rod are moved down and with movable valve plug action so as to carry out the firing device gas circuit of high heating value combustion gas and fuel gas with low heat value
Switching, while lower valve rod is synchronized with the movement with upper valve rod and is engaged with jet hole, so as to have adjusted the high and low calorific value of jet hole correspondence
Effective admission sectional area needed for combustion gas.
6. safety-type double-source gas control system according to claim 5, is characterized in that：Valve element, valve body band are tapered,
Lower valve rod is slidably matched with valve element, and valve element upper surface is provided with the housing of shaping in conjunction, and spring housing is on upper valve rod and arranges
In housing, boss is provided with upper valve rod, spring upper and lower ends are offseted with boss, valve element respectively, are provided with and boss on housing
The linkage notch being engaged, is provided with low, the high heating value combustion gas gear groove of one high and one low and setting of staggering, upper valve rod inside valve seat
Moving down makes boss snap in linkage notch while rotating upper valve rod drives Spool rotating so as to carry out the dress of igniting of high and low calorific value fuel gas
Gas circuit switching is put, and boss snaps in the positioning that corresponding gear groove realizes lower valve rod.
7. safety-type double-source gas control system according to claim 5, is characterized in that：The notch cross section is arc
Shape, low heat value firing device gas outlet and high heating value firing device gas outlet on the same line, firing device gas circuit air inlet
Positioned at the vertical direction of straight line residing for high and low calorific value firing device gas outlet.
8. safety-type double-source gas control system according to claim 5, is characterized in that：Valve element is slided up and down and is arranged on
In valve body, lower valve rod is fixedly connected with valve element, and low, high heating value firing device gas outlet and firing device gas circuit air inlet are along valve
Core central axial direction is arranged, and firing device gas circuit air inlet is arranged between low, high heating value firing device gas outlet；Valve body
Upper end is shrunk to a saddle, is provided with boss on upper valve rod, spring housing on upper valve rod and spring upper and lower ends respectively with saddle,
Boss offsets, and is provided with low, the high heating value combustion gas gear groove of one high and one low and setting of staggering inside valve seat, and upper valve rod is moved down and made down
Valve rod, valve spool switch so as to the firing device gas circuit for carrying out high and low calorific value fuel gas, and upper valve rod rotation makes boss correspondence
Snap in the positioning that different gear grooves realize lower valve rod and valve element.
9. safety-type double-source gas control system according to claim 5, is characterized in that：The lower valve rod lower end is cone
Shape, during low heat value gear, lower valve rod lower end departs from jet hole, during high heating value gear, causes in lower valve rod lower end insertion jet hole
The effective admission sectional area of jet hole changes.
10. safety-type double-source gas control system according to claim 5, is characterized in that：The lower valve rod lower end is
Cylinder, caliber size of the lower valve rod lower end diameter less than jet hole, during low heat value gear, lower valve rod lower end departs from jet hole；
During high heating value gear, lower valve rod lower end insertion jet hole so that the effective admission sectional area of jet hole changes.
11. safety-type double-source gas control systems according to claim 5, is characterized in that：The lower valve rod lower end is
Cylinder, is provided with multiple pores at jet hole, lower valve rod lower end is cased with O-ring seals, during low heat value gear, lower valve rod and nozzle
Mouth separately makes all pores keep insertion；And during high heating value gear, lower valve rod is moved down makes lower valve rod lower end block a wherein pore
So that the effective admission sectional area of jet hole changes.
12. safety-type double-source gas control systems according to claim 5, is characterized in that：The lower valve rod lower end is
Taper, is provided with multiple pores at jet hole, during low heat value gear, lower valve rod separately makes all pores keep insertion with jet hole,
And during high heating value gear, lower valve rod is moved down makes lower valve rod lower end block a wherein pore so that the effective admission of jet hole cuts
Area changes.
13. safety-type double-source gas control systems according to claim 5, is characterized in that：Lower valve rod bottom is shrunk to
One push rod, push rod upper end are fixed with a back-up ring, and push rod lower end movable sleeve has penetrated a sealing gasket, and on push rod, set has penetrated spring,
Spring upper and lower ends are offseted with back-up ring, sealing gasket respectively, are provided with multiple pores, during low heat value gear, on lower valve rod at jet hole
Shipper pole dynamic sealing pad departs from jet hole makes all pores keep insertion；During high heating value gear, lower valve rod is moved down makes spring seal
Pad is pressed at corresponding pore, so as to reduce the effective admission sectional area of jet hole.
A kind of 14. control methods based on control system described in any one of claim 1～13, is characterized in that：
When system correctly introduces combustion gas, corresponding thermocouple is only heated, during the potential that thermocouple is produced makes switching control pilot
Magnetic valve adhesive, so that gas circuit conducting；
When system mistake by fuel gas with low heat value introduce high heating value gas ignition device when, induction tunnel cannot be lighted, thermocouple without
Potential is produced, it is impossible to make the magnetic valve adhesive in switching control pilot, gas circuit shut-off；
When high heating value combustion gas is introduced fuel gas with low heat value firing device by system mistake, the injection of fuel gas with low heat value ignition device
Pipe jets out flames can be abnormal elongated, while heating two thermocouples, two thermocouples can produce electromotive force simultaneously and offset,
The magnetic valve adhesive in switching control pilot, gas circuit shut-off cannot be made.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510505181.8A CN105066238B (en) | 2015-08-17 | 2015-08-17 | Safety-type double-gas-source gas control system and control method |
| US15/000,958 US10190772B2 (en) | 2015-08-17 | 2016-01-19 | Dual fuel ignition device and work method thereof as well as safety type dual fuel control system based thereon and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510505181.8A CN105066238B (en) | 2015-08-17 | 2015-08-17 | Safety-type double-gas-source gas control system and control method |
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| Publication Number | Publication Date |
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| CN105066238A CN105066238A (en) | 2015-11-18 |
| CN105066238B true CN105066238B (en) | 2017-03-22 |
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| CN201510505181.8A Active CN105066238B (en) | 2015-08-17 | 2015-08-17 | Safety-type double-gas-source gas control system and control method |
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| CN105371348B (en) * | 2015-12-02 | 2018-06-26 | 慈溪市天行电器有限公司 | Fuel gas heating apparatus |
| CN112050284A (en) * | 2020-09-24 | 2020-12-08 | 长青热能科技(中山)有限公司 | Multi-air-source warmer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101881481B (en) * | 2010-06-10 | 2012-08-15 | 普鲁卡姆电器（上海）有限公司 | Dual-gas source combustion device |
| CN102840624B (en) * | 2012-09-13 | 2014-11-26 | 普鲁卡姆电器（上海）有限公司 | Self-adaptive type multi-gas-source gas control system |
| CN103244728B (en) * | 2013-04-19 | 2015-07-08 | 普鲁卡姆电器（上海）有限公司 | Gas valve and double-gas-source gas system |
| CN203731502U (en) * | 2014-02-28 | 2014-07-23 | 尹建达 | Timing controller capable of cutting off fuel gas channel automatically |
| CN204880345U (en) * | 2015-08-17 | 2015-12-16 | 浙江富迩佳电子科技有限公司 | Two air supply gas control system of safe type |
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