CN202024327U

CN202024327U - Burner

Info

Publication number: CN202024327U
Application number: CN201120048531XU
Authority: CN
Inventors: 马得明; 王泥刚; 董林泉
Original assignee: HERMEN ENTERPRISES Ltd
Current assignee: HERMEN ENTERPRISES Ltd
Priority date: 2011-02-25
Filing date: 2011-02-25
Publication date: 2011-11-02
Anticipated expiration: 2021-02-25

Abstract

The utility model discloses a burner comprising a combustion head, an igniter, a fuel transporting/adjusting device, a combustion air transporting/adjusting device, a safe operation monitor and an electric control device, wherein the combustion air transporting/adjusting device is provided with an air door mechanism controlled by an air door executor, a frequency converter controlling the rotating speed of a blast motor, and a displacement sensor which is in linkage with the air door executor to control the output frequency of the frequency converter, a program controller of the electric control device instructs the air door executor to control switching values of the air door mechanism according to the needs of burning loads, and the frequency converter adjusts the frequency output of the frequency converter to the blast motor according to a switching value signal about the air door mechanism, detected by the displacement sensor, so as to control the rotating speed of the blast motor, therefore, a firepower adjusting proportion range of the burner can be widened by the combination of two ways of frequency control of motor speed and air door adjusting.

Description

Burner

Technical field

The utility model relates to a kind of combustion apparatus, refers in particular to a kind of burner.

Background technology

The common burner that is used for heat-exchange apparatus such as boiler, air-conditioning unit and firing equipments such as drying machine, annealing device, be the higher electromechanical integrated product of a kind of automaticity, mainly form by various pieces such as combustion head, igniter, fuel conveying/adjusting device, combustion air conveying/adjusting device, safe operation monitoring device and electric control gears.Wherein, the effect of combustion air conveying/adjusting device is to blow into enough air to the combustion chamber of combustion head, to satisfy the needs of fuel (as combustion gas or fuel oil) burning.Traditional burner, its air blast are constant speed drive, and like this, when low load combustion, the motor of air blast still turns round with constant power, and has caused the waste of motor part input power.

The burner design that frequency converter is set in air blast and passes through the Frequency Converter Control motor rotation is also arranged, for example State Intellectual Property Office in June 30 in 2004 Granted publication the patent No. be the utility model patent of ZL03243710.3, the automatic blowing type gas burner of a kind of frequency conversion is promptly disclosed, it is provided with a frequency converter, this frequency converter respectively with the cyclelog of electric control gear, the motor of air blast connects, it is according to the variation of boiler live load, output frequency by cyclelog control frequency converter, thereby the operating frequency of control motor, to realize accurate adjusting, reach the raising efficiency of combustion to air quantity, energy-conservation purpose.

Yet, only adopt the burner of frequency converter timing to exist the narrower defective of firepower adjusting proportion, as shown in Figure 1, for the working curve diagram of typical frequency control burner, as the high rotating speed (n of air blast ₁) when moving, the numerical value of Δ P1 is higher, and along with the rotating speed of air blast descends, the numerical value of Δ P can reduce gradually, promptly Δ P1＞Δ P2＞Δ P3＞...＞Δ Pn, if when the numerical value of Δ P is reduced to certain low value, just lose adaptive ability, cause the instability of flame flame.Generally speaking, only adopt the firepower adjusting proportion of the burner of frequency converter timing to be about 2: 1, i.e. big fire output 100%, little fire then exports 50%.

Summary of the invention

The utility model is to solve the narrower technical problem of existing firepower adjusting proportion in the existing burner, and a kind of burner that the broad firepower is regulated proportion that has is provided.

In order to solve the problems of the technologies described above, the utility model is by technical scheme as described below: a kind of burner, it includes combustion head, igniter, fuel conveying/adjusting device, combustion air conveying/adjusting device, safe operation monitoring device and electric control gear, described combustion air conveying/adjusting device includes a housing, one is arranged at the blasting vane wheel in the described housing, one blower motor that is used to drive this blasting vane wheel rotation that connects with described blasting vane wheel, one is arranged at the air door mechanism on the described housing, the one air door baffle plate that is connected in described air door mechanism is with the air door actuator of the switching value of controlling this air door mechanism, one frequency converter that is connected with displacement transducer with this blower motor respectively in the displacement transducer and of the switching value that detects described air door mechanism, wherein, described housing connects with described combustion head by an ajutage, described air door actuator is connected with the cyclelog of described electric control gear and controls its action by described cyclelog, described cyclelog outputs signal to described air door actuator to control the switching value of described air door mechanism according to the needs of burning load, described displacement transducer inputs to described frequency converter with detected switching value signal about air door mechanism, and described frequency converter is adjusted its frequency output for described blower motor in view of the above.

In the said burner, described cyclelog is connected with a firepower adjustment control, described firepower adjustment control is connected with a temperature/pressure sensor that places the heat power equipment place, it detects the temperature/pressure at heat power equipment place, feed back to described firepower adjustment control and calculate the switching value of air door mechanism in view of the above, and be passed to described cyclelog and carry out to control described air door actuator.

In the said burner, the set fuel control valve of described fuel conveying/adjusting device is that air/fuel compares fuel control valve, it is provided with a blast detector tube with the blast in the ajutage that detects described combustion air conveying/adjusting device, and the switching value of fuel metering control valve in view of the above, with the control flow fuel.

In the said burner, described fuel control valve is built-in with a servo stable-pressure device, it is provided with a fuel pressure detector tube detecting the fuel pressure at described fuel control valve valve export place, and the switching value of fuel metering control valve in view of the above, to keep the stable of valve exit fuel pressure.

In the said burner, described displacement transducer is arranged on the described air door actuator.

In the said burner, described displacement transducer is arranged on the described air door mechanism.

In the said burner, described displacement transducer is a potentiometer.

In the said burner, described current potential is counted knob or slidingtype potentiometer.

In the said burner, described frequency converter is connected with described cyclelog and controls its switch by this cyclelog.

Useful technique effect of the present utility model is: the air-blast device of this burner is provided with one by the air door mechanism of air door actuator control and the frequency converter of a control blower motor rotating speed, and be provided with one with the displacement transducer of air door actuator interlock output frequency with the control frequency converter, cyclelog is according to the switching value of the needs instruction air door actuator control air door mechanism of burning load, frequency converter is then adjusted its frequency output for blower motor according to the switching value signal about air door mechanism that displacement transducer detected, the rotating speed of control blower motor, like this, by the combination of frequency control and air door mechanism adjusting dual mode, the firepower that can widen burner is regulated proportion.

Description of drawings

Fig. 1 is the existing working curve diagram that adopts the burner of frequency converter timing.

Fig. 2 is the structural representation of the utility model burner.

Fig. 3 is the part-structure schematic diagram of the utility model burner.

Fig. 4 is the structural representation of the part control circuit of the utility model burner.

Fig. 5 is the structural representation of another part control circuit of the utility model burner.

Fig. 6 is the schematic diagram that the frequency converter of the utility model burner is provided with.

Fig. 7 is the employing frequency converter timing of the utility model burner and the working curve diagram that import formula air door is regulated.

Fig. 8 is the employing frequency converter timing of the utility model burner and the working curve diagram that the exit type air door is regulated.

The specific embodiment

For making those of ordinary skill in the art be expressly understood the purpose of this utility model, technical scheme and advantage more, the utility model is further elaborated below in conjunction with drawings and Examples.

Referring to figs. 2 to shown in Figure 5, burner disclosed in the utility model includes a combustion head 10, an igniter (not illustrating among the figure), a fuel conveying/adjusting device 12, a combustion air conveying/adjusting device 14, a safe operation monitoring device (not illustrating among the figure) and an electric control gear 16, this electric control gear 16 is connected with igniter, fuel conveying/adjusting device 12, combustion air conveying/adjusting device 14, safe operation monitoring device respectively, controlling operation of above-mentioned each device, and finish the automatically working of this burner.

This combustion head 10 includes a flame tube 100 and and is arranged at nozzle 101 in this flame tube 100, this nozzle 101 connects with fuel conveying/adjusting device 12 by cartridge 120, fuel (combustion gas or fuel oil) is delivered to nozzle 101 by this fuel conveying/adjusting device 12, and burns.Usually, also be provided with a stable flame pan 102 corresponding to these nozzle 101 places, this stable flame pan 102 can be located at the place, the place ahead of this nozzle 101, also can be located at the place, rear of this nozzle 101.

This igniter includes an ignitor that is adjacent to these nozzle 100 places, and this ignitor is connected with the cyclelog 160 of electric control gear 16 by an igniting transformer A1.

In conjunction with shown in Figure 5; fuel conveying/adjusting device 12 includes cartridge 120, is arranged at the fuel control valve 121 on this cartridge 120 and the driven valve A2, the easing valve A3 that are controlled by cyclelog 160, kindling material valve A4, low fuel pressure protected location A5, high fuel pressure protected location A6 and fuel valve leak detection unit A7 etc.; certainly; fuel conveying/adjusting device 12 is not limited to above-mentioned structure, and it can adopt various suitable fuel conveying/adjusting device of the prior art.

This fuel control valve 121 be air/fuel than fuel control valve, it is provided with a blast detector tube 122 detecting the blast (air quantity) in the ajutage 148, and the switching value of regulating this fuel control valve 121 in view of the above, thus the control flow fuel.Preferentially, this fuel control valve 121 is built-in with a servo stable-pressure device, it is provided with a fuel pressure detector tube 123 detecting the fuel pressure at these fuel control valve 121 valve export places, and the switching value of regulating this fuel control valve 121 in view of the above, to keep the stable of valve exit fuel pressure.

This combustion air conveying/adjusting device 14 includes a housing 140, one is arranged at the blasting vane wheel 141 in this housing 140, one blower motor 142 that is used to drive these blasting vane wheel 141 rotations that connects with this blasting vane wheel 141, one is formed at the air door mechanism 143 on this housing 141, the one air door baffle plate 144 that is connected in this air door mechanism 143 is with the air door actuator 145 of the switching value of controlling this air door mechanism 143, one is installed on being used on the air door actuator 145 detects the frequency converter 147 that the displacement transducer 146 and of the switching value of this air door mechanism 143 is connected with displacement transducer 146 with this blower motor 142 respectively, wherein, air door actuator 145 is connected with cyclelog 160 and controls its actions by this cyclelog 160, frequency converter 147 is connected with cyclelog 160 and controls its switches by this cyclelog 160, and this housing 140 then connects with the flame tube 100 of combustion head 10 by an ajutage 148.Cyclelog 160 outputs signal to the switching value of air door actuator 145 with control air door mechanism 143 according to the needs of burning load, displacement transducer 146 inputs to frequency converter 147 with detected switching value signal about air door mechanism 143, this frequency converter 147 is adjusted its frequency output for blower motor 142 in view of the above, thus the rotating speed of control blower motor 142.

In the foregoing description, this displacement transducer 146 is installed on the air door actuator 145 to detect the switching value of air door 143, apparently, also displacement transducer 146 can be arranged at (for example in the rotating shaft of air door baffle plate 144) on the air door mechanism 143, it also can detect the switching value of air door mechanism 143.

Preferably, displacement transducer 146 adopts the potentiometer of knob or slidingtype, make air door mechanism 143 and potentiometer interlock, when the switching value of air door actuator 145 damper mechanisms 143, potentiometer serves as the control input of frequency converter 147 according to the different resistance of transfer (or translation of sliding distance) output of its anglec of rotation.

This cyclelog 160 is connected with a firepower adjustment control 150, this firepower adjustment control 150 is connected with a temperature/pressure sensor 151 that places heat power equipment (comprising heat-exchange apparatus or firing equipment etc.) to locate, it detects the temperature/pressure at heat power equipment place, feed back to this firepower adjustment control 150 and calculate the switching value of air door mechanism 143 in view of the above, and be passed to this cyclelog 160 to control this air door actuator 145 execution.

The safe operation monitoring device mainly includes flame monitor A8, and it is used to monitor the situation of combustion flame, and produces signal feedback to cyclelog 160.

With reference to shown in Figure 6, frequency converter 147 is provided with lower bound output frequency and high limit output frequency, between lower bound output frequency and high limit output frequency, its output frequency for blower motor 142 is regulated accordingly along with the signal of displacement transducer 146, accompanying drawing is counted example with current potential, be that then the output frequency of this frequency converter 147 is corresponding adjustment along with the variation of potentiometric resistance between low, the high limit output frequency.Certainly, accompanying drawing 6 cited about the switch degree of potentiometric resistance, air door mechanism 143, the numerical value such as output frequency of frequency converter 147, only be a kind of possible embodiment, be not to be used to limit the utility model.

Be the operation that example illustrates burner disclosed in the utility model with potentiometer as displacement transducer below, it mainly included as the next stage.

1, holding state: the automatic control loop contact separates, and the fuel supply is cut off, and air-blast device 14 shuts down, and air door mechanism 143 is closed, and waits for enabled instruction.

2, start: the automatic control loop closing of contact, burner begin to carry out a series of safe preliminary examination program, purging program before can beginning after security of system is confirmed.

3, preceding purge stages: air door actuator 145 rotates (or reach) forward, opens big air door 143 at a slow speed, and blower motor 142 starts simultaneously, begins to slowly run; Air door mechanism 143 is in opening big process, change potentiometric resistance output, when potentiometric resistance output surpasses the lower bound setting of frequency converter 147, frequency converter 147 will be heightened output frequency according to the input resistance amount, and blower motor 142 is followed the aperture accelerated service of air door mechanism 143 indirectly; When potentiometric resistance output surpassed the high limit setting of frequency converter 147, blower motor 142 stopped speed-raising, continues running up, and finishes until preceding purge stages.

4, igniting: after preceding purge stages is finished, air door actuator 145 is to counter-rotation (or then move), turn down air door 143 at a slow speed, blower motor 142 (along with potentiometric output) reduces rotating speed simultaneously, air door mechanism 143 stops at default ignition location (or angle), at this moment blower motor 142 prepares the burning-point kindling material in the lower bound rotation speed operation; Ignitor energising arcing, kindling material valve A4 opens subsequently, only allow that fuel enters combustion head 10 in a small amount, light kindling material, after kindling material success burning-point and the affirmation, fuel control valve 121 is opened and is allowed fuel enter combustion head 10 burning-point master flames, treats to cut off kindling material valve A4 after main flame normal combustion and flame are normally confirmed, at this moment burner is finished ignition phase in little fiery power burning.

5, normal combustion, Load Regulation: in the normal combustion stage, opening big and turning down by firepower adjustment control 150 of air door mechanism 143 taken over, air door actuator 145 is opened big by load or is turned down air door mechanism 143, resistance variations control frequency converter 147 outputs of potentiometer (with air door mechanism 143 interlocks), the rotating speed of blower motor 142 is quickened by 145 controls of air door actuator indirectly or slows down, because being air/fuel proportion expressions, regulates fuel control valve 121, blast in the flame tube 100 high/low (air quantity big/little) control automatically fuel control valve 121 apertures big/little, increase/reduce the fuel input quantity.

6, the post-purge stage: when the automatic control loop contact separated, cyclelog 160 fuel shutoff valves stopped to import fuel, and burner begins the post-purge program; Air door actuator 145 rotates (or reach) forward and opens big air door mechanism 143, and blower motor 142 speed-raising runnings increase the purging blow rate required.If heat power equipment need not to carry out the post-purge program, the air blast in this stage purges program and will be skipped over.

7, (getting back to standby dress attitude) out of service: after the post-purge program is finished (or skipping over), frequency converter 147 stops output (blower motor 142 shuts down), air door mechanism 143 is carried out to counter-rotation (or then move) and is turned down air door mechanism, treats to stop when air door mechanism moves to the default position of closing the door (or angle).Burner is adorned attitude in standby, waits for enabled instruction next time.

Air-blast device 14 of the present utility model is provided with one by the air door mechanism 143 of air door actuator 145 controls and the frequency converter 147 of a control blower motor 142 rotating speeds, and be provided with one with the displacement transducer 146 of air door actuator 145 interlock output frequency with control frequency converter 147, cyclelog 160 is according to the switching value of the needs instruction air door actuator 145 control air door mechanisms 143 of burning load, the switching value signal about air door mechanism 143 that frequency converter 147 is then detected according to displacement transducer 146 is adjusted its frequency output for blower motor 142, the rotating speed of control blower motor 142, like this, regulate the combination of dual mode by frequency control and air door mechanism, the firepower that can widen burner is regulated proportion, show the working curve diagram that burner adopts frequency converter timing to regulate in conjunction with import formula air door mechanism as Fig. 7, Fig. 8 then shows the working curve diagram that burner adopts frequency converter timing to regulate in conjunction with the exit type air door mechanism, from accompanying drawing as can be seen, regulate the mode of interlock frequency control by air door mechanism, when burning load is big, then adopt the output of frequency converter high-frequency (correspondingly, the blower motor rotating speed is very fast) cooperate big aperture air door mechanism regulative mode to realize, when burning load is big, then adopt the output of converter low-frequency rate (correspondingly, the blower motor rotating speed is slower) cooperate little aperture air door mechanism regulative mode to realize, thus can realize 5: 1 even wideer firepower adjusting proportion.

Above-mentioned only is preferred embodiment of the present utility model; but not the utility model is done any pro forma restriction; for example; combustion head, igniter, fuel conveying/adjusting device, safe operation monitoring device and electric control gear etc. for burner; also can adopt the suitable structure of prior art; all equivalent variations or modifications of being done in the claim scope all should fall within the utility model protection domain.

Claims

1. burner, include combustion head (10), igniter, fuel conveying/adjusting device (12), combustion air conveying/adjusting device (14), safe operation monitoring device and electric control gear (16), it is characterized in that: described combustion air conveying/adjusting device (14) includes a housing (140), one is arranged at the blasting vane wheel (141) in the described housing (140), one blower motor (142) that is used to drive this blasting vane wheel (141) rotation that connects with described blasting vane wheel (141), one is arranged at the air door mechanism (143) on the described housing (141), the one air door baffle plate (144) that is connected in described air door mechanism (143) is with the air door actuator (145) of the switching value of controlling this air door mechanism (143), one frequency converter (147) that is connected with displacement transducer (146) with this blower motor (142) respectively in the displacement transducer (146) and of the switching value that detects described air door mechanism (143), wherein, described housing (140) connects with described combustion head (10) by an ajutage (148), described air door actuator (145) is connected with the cyclelog (160) of described electric control gear (16) and controls its action by described cyclelog (160), described cyclelog (160) outputs signal to described air door actuator (145) to control the switching value of described air door mechanism (143) according to the needs of burning load, described displacement transducer (146) inputs to described frequency converter (147) with detected switching value signal about air door mechanism (143), and described frequency converter (147) is adjusted its frequency output for described blower motor (142) in view of the above.

2. burner as claimed in claim 1, it is characterized in that: described cyclelog (160) is connected with a firepower adjustment control (150), described firepower adjustment control (150) is connected with a temperature/pressure sensor (151) that places the heat power equipment place, it detects the temperature/pressure at heat power equipment place, feed back to described firepower adjustment control (150) and calculate the switching value of air door mechanism (143) in view of the above, and be passed to described cyclelog (160) and carry out to control described air door actuator (145).

3. burner as claimed in claim 1 or 2, it is characterized in that: the set fuel control valve (121) of described fuel conveying/adjusting device (12) compares fuel control valve for air/fuel, it is provided with a blast detector tube (122) with the blast in the ajutage (148) that detects described combustion air conveying/adjusting device (14), and the switching value of fuel metering control valve (121) in view of the above, with the control flow fuel.

4. burner as claimed in claim 3, it is characterized in that: described fuel control valve (121) is built-in with a servo stable-pressure device, it is provided with a fuel pressure detector tube (123) to detect the fuel pressure at described fuel control valve (121) valve export place, and the switching value of fuel metering control valve (121) in view of the above, to keep the stable of valve exit fuel pressure.

5. burner as claimed in claim 1 is characterized in that: described displacement transducer (146) is arranged on the described air door actuator (145).

6. burner as claimed in claim 1 is characterized in that: described displacement transducer (146) is arranged on the described air door mechanism (143).

7. burner as claimed in claim 1 is characterized in that: described displacement transducer (146) is a potentiometer.

8. burner as claimed in claim 7 is characterized in that: described current potential is counted knob or slidingtype potentiometer.

9. burner as claimed in claim 1 is characterized in that: described frequency converter (147) is connected with described cyclelog (160) and controls its switch by this cyclelog (160).