CN104214372A - Flow control valve for combustor - Google Patents

Abstract

The invention provides a flow control valve for a combustor and belongs to the technical field of control valves. The flow control valve is used for solving the technical problems of the existing combustors that gas flow is not easy to control and the use is not safe. The flow control valve for the combustor comprises a valve body and a front end cover, wherein a gas inlet pipe, a gas outlet pipe and a combustion gas introducing pipe are arranged on the external surface of the valve body, a partition block is arranged in the valve body, a first through hole is formed in the partition block, the gas inlet pipe is communicated with a second accommodating chamber, the gas outlet pipe and the combustion gas introducing pipe are respectively communicated with a first accommodating chamber, a valve core is arranged in the first accommodating chamber, an axial hole coaxial with the first through hole is formed in the rear end of the valve core, and a combustion gas introducing hole and a gas outlet hole which are respectively communicated with the axial hole are formed in the external surface of the rear end of the valve core; when the valve core is turned in the first accommodating chamber, the combustion gas introducing pipe is communicated with the combustion gas introducing hole, and the gas outlet pipe is communicated with the gas outlet hole; a combustion gas introducing pipeline and a combusting gas pipeline are subjected to separate gas supplying, and when the combustion gas introducing pipeline is ignited, the gas supply flow is stable, the ignition efficiency is high, and the ignition process is safer.

Description

For the flow control valve of burner

Technical field

The invention belongs to control valve art field, relate to a kind of flow control valve, be specifically related to a kind of flow control valve for burner.

Background technique

Flow control valve is under certain pressure difference, and rely on the size changing the resistance of throttling oral fluid to carry out the flow of control orifice, thus regulate the valve class of actuator movement speed, its using scope is quite wide, is generally divided into gas flow control valve and liquid flow control valve.

Gas burner controls often through this flow control valve of use and regulates the gas flow size of burner, and reach the object of burner igniting or control combustion device intensity of a fire size, existing flow control valve comprises valve body and the spool that is arranged in valve body and rotating shaft, valve body is provided with an inlet hole and an air outlet hole, the adjustable spool of rotating shaft, to lead the object of igniting and adjustment intensity of a fire size, the control valve of this structure is called as the control valve of two general formulas, control air inlet and adjustments of gas by a gas flow path simultaneously, although control valve structure is simple, easy to use, but also there is following problem simultaneously, 1, burner is when lighting a fire, rotating shaft rotates, burning gas circuit and gas circuit of igniting are integrally and synchronous, and complete igniting and follow-up air feed by an air supply channel, during igniting, the uninterrupted of gas is determined by the angle of swing of rotating shaft usually, and for different people, this angle of swing is variant, cannot control preferably, angle of swing is too small, gas flow is little, need repeatedly to light a fire and just can light, and angle of swing is excessive, gas flow is large, the intensity of a fire of moment successfully of lighting a fire is larger, larger threat is existed to personal safety, 2, in use, the intensity of a fire is when regulating, and when particularly turning down, cannot grasp preferably because countershaft rotates, room causes the intensity of a fire to be extinguished, and after extinguishing, needs equally again to light a fire, 3, burner in use often minibreak, for the sake of security, generally burner is turned off during pause, now, the complete gas of unburned can run off, and when reusing, need again to light a fire, gas needs again to flow to igniting by source of the gas, and while waste gas, it uses also inconvenient.

In sum, in order to solve the technical problem of above-mentioned control valve, needing to design a kind of gas flow and easily controlling, the easy to use, safe and flow control valve for burner that not easily extinguishes of intensity of a fire when using.

Summary of the invention

The object of the invention is the problems referred to above existed for prior art, propose a kind of gas flow and easily control, the easy to use, safe and flow control valve for burner that not easily extinguishes of intensity of a fire when using.

Object of the present invention realizes by following technical proposal: for the flow control valve of burner, the valve body comprising interior sky and the front cover be connected with valve body, described valve body outer surface is provided with the suction tude axially staggered, steam outlet pipe and the tracheae that ignites, be provided with in valve body and make its inner spacer block forming the first receiving cavity and the second receiving cavity, spacer block offers the first through hole that the first receiving cavity is communicated with the second receiving cavity, described suction tude communicates with the second receiving cavity, described steam outlet pipe and the tracheae that ignites communicate with the first receiving cavity respectively, spool is provided with in the first receiving cavity, spool rear end offers the axis hole coaxial with the first through hole, ignite pore and the air outlet hole that communicate with axis hole is respectively offered in spool back end outer surface, when spool rotates in the first receiving cavity, the described tracheae that ignites communicates with the pore that ignites and steam outlet pipe communicates with air outlet hole.

Above-mentioned in the flow control valve of burner, the described pore that ignites is bar shaped and is laterally opened in valve core outer surface, the first adjustment hole that described air outlet hole is offered by lateral inclination forms with horizontal vertical the second adjustment hole offered, described first adjustment hole and the second adjustment hole is horizontal is in same level, described first adjustment hole, the second adjustment hole and bar hole all stagger and arrange on the horizontal direction and axial direction of spool.

Above-mentioned in the flow control valve of burner, axially receiving bore is offered in spool front end, spool axially offers the first breach communicated with receiving bore, be provided with between spool and front cover and can move axially and run through the rotating shaft of front cover, rotating shaft is convexly equipped with block, described rotating shaft is inserted in receiving bore and block can move in the first breach, when block is positioned at the first breach, described in the tracheae that ignites be in communicating state and steam outlet pipe and air outlet hole communicating state or the state that staggers with the pore that ignites.

Above-mentioned in the flow control valve of burner, there is in described front cover the 3rd receiving cavity, 3rd receiving cavity internal fixtion is provided with neck bush, first counter sink coaxial with the first receiving cavity is offered in valve body front end, described neck bush is positioned at spool periphery and neck bush rear end is against the first counter sink place, described neck bush offers and to overlap with the first breach and length is less than the second breach of the first notch length, when block is positioned at the first breach and the second breach simultaneously, the tracheae that ignites is in communicating state with the pore that ignites and steam outlet pipe and air outlet hole are in communicating state.

Above-mentioned in the flow control valve of burner, in described 3rd receiving cavity, there is ring-shaped platform, on 3rd receiving cavity madial wall, radial convex is provided with the arc bump be connected with ring-shaped platform, described neck bush offers the arc notch that its length is less than arc bump length, arc bump to embed in arc notch and makes neck bush front end and be formed with the curve bath communicated with the second breach between ring-shaped platform, curve bath length is greater than pore length of igniting, when block is only positioned at the first breach, described block can move in curve bath.

Above-mentioned in the flow control valve of burner, described ring-shaped platform offers some restraining grooves of being connected with the 3rd receiving cavity madial wall and wherein a restraining groove is corresponding with the second breach, when block moves in curve bath, block can be fixed in any restraining groove.

Above-mentioned in the flow control valve of burner, the rear end cover with the 4th receiving cavity is provided with in valve body rear end, be provided with solenoid valve in described second receiving cavity and four receiving cavities, solenoid valve front end is provided with can move and the Valve plug that can seal or make the first through hole to open the first through hole.

Above-mentioned in the flow control valve of burner, mandrel is provided with between described Valve plug and rotating shaft, blind hole is offered in rotating shaft rear end, offer the second through hole that axis hole is communicated with receiving bore in described spool and mandrel through the second through hole, described mandrel one end insertion blind hole is interior and the other end is against on Valve plug, when rotating shaft moves axially and block is positioned at the first breach and the second breach simultaneously, Valve plug is pushed open and suction tude is communicated with the first receiving cavity by described mandrel.

Above-mentioned in the flow control valve of burner, described mandrel leading exterior surface offers circular groove, jump ring is provided with in circular groove, between receiving bore and jump ring, be provided with the first spring be sheathed on mandrel, between rotating shaft rear end and jump ring, be provided with the second spring be sheathed on mandrel.

Above-mentioned in the flow control valve of burner, receiving bore interior edge face offers second counter sink coaxial with the second through hole, be provided with seal ring and the packing ring compressed by seal ring in the second counter sink, described first spring is between packing ring and jump ring.

Compared with prior art, the present invention has following beneficial effect:

1, in the present invention, gas circuit of igniting is realized by the air supply channel that the tracheae that ignites is different with steam outlet pipe two respectively from burning gas circuit, gas circuit of igniting is front, burning gas circuit is rear, the two separately carries out, gas circuit of igniting is lighted rear being responsible for and combustion gas waypoint is fired, its air demand is less and constant, without the need to regulating, therefore, there will not be the situation that gas flow is excessive or too small during igniting, during gas circuit of igniting igniting, there will not be combustion gas road loss of ignition or the excessive situation of burning gas circuit flow, ignition effectiveness is high and igniting process is safer.

2, gas circuit of igniting only is responsible for the burning gas circuit of lighting steam outlet pipe, to realize the object of burner combustion, in the process of burner combustion, the tracheae that ignites continues air feed and can not extinguish after lighting, burning gas circuit is responsible for the burning of burner, the adjustment of burning gas circuit flow is realized by the size adjusting pore, to realize the adjustment of intensity of a fire size, because gas circuit of igniting continues to carry out, whether the adjustment of burning gas circuit or burning gas circuit are burnt and are not produced any impact to gas circuit of igniting, therefore, the burning gas circuit of lighting also not easily is extinguished in adjustment process, greatly reduce the possibility of regnition, using effect is better.

3, because the gas circuit flow that ignites is less and constant, use safer, therefore, when burner midway of short duration stop using time, only burning gas circuit need be stopped, when reusing, only burning gas circuit need being opened, use more convenient, simultaneously also without the need to again lighting a fire, in this process, gas circuit of only igniting continues to carry out, but its air-loss amount is less, prevents gas loss simultaneously.

Accompanying drawing explanation

Fig. 1 is the perspective view of a preferred embodiment of the present invention.

Fig. 2 is the three-dimensional cutaway view of a preferred embodiment of the present invention.

Fig. 3 is the exploded perspective schematic diagram of a preferred embodiment of the present invention.

Fig. 4 is the sectional view of valve body in a preferred embodiment of the present invention.

Fig. 5 is the profile of spool in a preferred embodiment of the present invention.

Fig. 6 is the sectional view of spool in a preferred embodiment of the present invention.

Fig. 7 is the perspective view of neck bush in a preferred embodiment of the present invention.

Fig. 8 is the back side schematic perspective view of front cover in a preferred embodiment of the present invention.

In figure, 100, valve body; 110, suction tude; 120, steam outlet pipe; 130, ignite tracheae; 140, spacer block; 141, the first through hole; 150, the first receiving cavity; 160, the second receiving cavity; 170, the first counter sink; 200, front cover; 210, the 3rd receiving cavity; 211, arc bump; 220, neck bush; 221, the second breach; 222, arc notch; 223, curve bath; 230, ring-shaped platform; 231, restraining groove; 300, spool; 310, axis hole; 320, ignite pore; 330, air outlet hole; 331, the first adjustment hole; 332, the second adjustment hole; 340, receiving bore; 341, the second counter sink; 342, seal ring; 343, packing ring; 350, the first breach; 360, mandrel; 361, circular groove; 362, jump ring; 363, the first spring; 364, the second spring; 370, the second through hole; 400, rotating shaft; 410, block; 420, blind hole; 500, rear end cover; 510, the 4th receiving cavity; 600, solenoid valve; 610, magnet; 620, Valve plug; 630, valve shaft; 640, Returnning spring.

Embodiment

Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.

As shown in Figure 1, the present invention is used for flow control valve, the valve body 100 comprising interior sky and the front cover 200 be connected with valve body 100 of burner.

The suction tude 110 axially staggered is provided with at valve body 100 outer surface, steam outlet pipe 120 and the tracheae 130 that ignites, the tracheae 130 that ignites is positioned at valve body 100 1 side external surface, suction tude 110 is positioned at the outer surface of the relative side of valve body 100 with steam outlet pipe 120, to ignite tracheae 130 and suction tude 110, steam outlet pipe 120 is divided into the both sides of valve body 100 symmetry, the spacing of each pipe farthest, make the intensity of whole valve body 100 the highest, be provided with in valve body 100 and make its inner spacer block 140 forming the first receiving cavity 150 and the second receiving cavity 160, spacer block 140 offers the first through hole 141 that the first receiving cavity 150 is communicated with the second receiving cavity 160, described suction tude 110 communicates with the second receiving cavity 160, described steam outlet pipe 120 and the tracheae 130 that ignites communicate with the first receiving cavity 150 respectively, spool 300 is provided with in the first receiving cavity 150, the axis hole 310 coaxial with the first through hole 141 is offered in the middle part of spool 300 rear end, spool 300 back end outer surface offers ignite pore 320 and the air outlet hole 330 that communicate with axis hole 310 respectively, spool 300 rear end has certain taper, the internal diameter ecto-entad of the first receiving cavity 150 reduces gradually and forms the tapering corresponding with spool 300, spool 300 inserts in the first receiving cavity 150, herein, spool 300 and the first receiving cavity 150 are by taper fit (i.e. stopcock), add the tightness degree between spool 300 and valve body 100, therebetween gap is reduced, the tightness when tracheae 130 that makes to ignite is ventilated with steam outlet pipe 120 is better, under original state, the tracheae 130 that ignites is in non-logical state (gas circuit of namely igniting is in non-for gaseity) with the pore 320 that ignites, steam outlet pipe 120 and air outlet hole 330 are also in non-logical state (gas circuit of namely burning is in non-for gaseity),

When spool 300 rotates in the first receiving cavity 150, the described tracheae 130 that ignites communicates with the pore 320 that ignites and realizes continuous air feed, namely to ignite gas circuit, gas circuit of igniting is lighted and sustained combustion forms ever-burning flame, continue spool 300 is rotated in the counterclockwise direction, steam outlet pipe 120 can communicate with air outlet hole 330, and gas circuit of now burning starts air feed and burns.

The present invention adopts said structure, the tracheae 130 that the ignites formation that communicates with the pore 320 that ignites is ignited gas circuit, steam outlet pipe 120 communicates with air outlet hole 330 and forms gas circuit of burning, gas circuit of igniting is realized by the air supply channel that the tracheae 130 that ignites is different with steam outlet pipe 120 two respectively from burning gas circuit, gas circuit of igniting is front, burning gas circuit is rear, gas circuit of igniting lights rear formation ever-burning flame, it is responsible for ignition combustion gas circuit, be responsible for the burning of burner after the combustion of combustion gas waypoint and form heat, the two separately carries out, and does not interfere with each other.

Gas circuit of igniting first is lighted when burner is lighted a fire and sustained combustion (ever-burning flame), its air demand is less and constant, without the need to regulating, therefore, there will not be the situation that gas flow is excessive or too small during igniting, during gas circuit of igniting igniting, there will not be combustion gas road loss of ignition or the excessive situation of burning gas circuit flow, light combustion gas road by the gas circuit of igniting of burning, ignition effectiveness is high and igniting process is safer.

Simultaneously, continue air feed due to the tracheae 130 that ignites and can not extinguish after lighting, and gas circuit of burning is adjustable when burning, realized the adjustment of burning gas circuit flow by the size adjusting pore 330, to realize the adjustment of intensity of a fire size, whether the adjustment of burning gas circuit or burning gas circuit are burnt and are not produced any impact to gas circuit of igniting, therefore, the burning gas circuit of lighting also not easily is extinguished in adjustment process, greatly reduces the possibility of regnition, usability is better, and effect is better.

It is worth mentioning that, this design is especially applicable to burner interval and uses, because the gas circuit flow that ignites is less and constant, use safer, therefore, when burner midway of short duration stop using time, only burning gas circuit need be stopped, when reusing, only burning gas circuit need being opened, use more convenient, simultaneously also without the need to again lighting a fire, in this process, gas circuit of only igniting continues to carry out, but its air-loss amount is less, prevents gas loss simultaneously.

Further, the described pore 320 that ignites is bar shaped and is laterally opened in spool 300 outer surface, described air outlet hole 330 offered by lateral inclination and the first adjustment hole 331 form with horizontal vertical the second adjustment hole 332 offered, this the first adjustment hole 331 shape is oval, second adjustment hole 332 shape is circular, described first adjustment hole 331 and the second adjustment hole 332 are laterally arranged side by side, and described first adjustment hole 331, second adjustment hole 332 is laterally being arranged with axially all staggering with the pore 320 that ignites.

Here, ignite pore 320 for bar shaped be continue the demand of air feed to meet gas circuit of igniting, owing to igniting, tracheae 130 all will continue air feed when ignition and combustion, and relative to the fixing tracheae 130 that ignites, the pore 320 that ignites rotates with spool 300, and therefore, by igniting, pore 320 is arranged to horizontal strip, make to ignite tracheae 130 with ignite pore 320 normal open, the gas circuit that makes to ignite can continue to carry out air feed.

Air outlet hole 330 has two, wherein, the first adjustment hole 331 is oval, and its aperture is larger, second adjustment hole 332 is circular, its aperture is less, the air outlet hole 330 of two different pore sizes, forms small one and large one two fiery positions, make to form the different intensity of a fire during burning of burning gas circuit, with the combustion needs of satisfied reality, each fiery position all can regulate, and its use is more flexible and more convenient.

First adjustment hole 331, second adjustment hole 332 laterally, axially staggers with the pore 320 that ignites, to make ignite pore 320 and the tracheae 130 that ignites, steam outlet pipe 120 and air outlet hole 330 one_to_one corresponding, prevent from igniting gas circuit to obscure with burning gas circuit and the two air feed separately separately cannot be realized, causing this control valve to reach igniting the effect of gas circuit and the independent air feed of burning gas circuit.

Further, axially receiving bore 340 is offered in spool 300 front end, spool 300 axially offers the first breach 350 communicated with receiving bore 340, be provided with between spool 300 and front cover 200 and can move axially and run through the rotating shaft 400 of front cover 200, rotating shaft 400 is convexly equipped with block 410, described rotating shaft 400 to be inserted in receiving bore 340 and block 410 movement the first breach 350 in.

Herein, the conducting piece that rotating shaft 400 is rotated as spool 300, rotating shaft 400 rear end is positioned at receiving bore 340, and block 410 stretches in the first breach 350, while gas circuit of igniting is lighted, unclamp rotating shaft 400, it automatically resets, and at rotating shaft 400, spool 300 can rotate with rotating shaft 400, the object regulating burning gas circuit size can be reached, realize the adjustment of intensity of a fire size.

Further, there is in described front cover 200 the 3rd receiving cavity 210, 3rd receiving cavity 210 internal fixtion is provided with neck bush 220, first counter sink 170 coaxial with the first receiving cavity 150 is offered in valve body 100 front end, described neck bush 220 is positioned at spool 300 periphery and neck bush 220 rear end is against the first counter sink 170 place, described neck bush 220 offers and to overlap with the first breach 350 and length is less than the second breach 221 of the first breach 350 length, under original state, block is positioned at beyond the first breach 350, now, the tracheae 130 that ignites is in non-logical state with the pore 320 that ignites, gas circuit of igniting is in non-for gaseity, steam outlet pipe 120 and air outlet hole 330 are also in non-logical state, burning gas circuit is in non-for gaseity, now, rotating shaft 400, block 410 is made to aim at the first breach 350, when the first breach 350 overlaps with the second breach 221 and block 410 to enter in the first breach 350 and to be positioned at the first breach 350 and the second breach 221 simultaneously, the tracheae 130 that ignites communicates with the pore 320 that ignites, the independent air feed of gas circuit of igniting, burning gas circuit not air feed, when block 410 exits the second breach 221 and is only positioned at the first breach 350, the tracheae 130 that ignites communicates with the pore 320 that ignites and steam outlet pipe 120 communicates with air outlet hole 330, now, while gas circuit of igniting air feed, combustion gas gas circuit can be made to change between the first adjustment hole 331 and the second adjustment hole 332 by regulating spool 300, burning gas circuit is regulated under two intensity of a fire varied in size.

The invention has the advantages that, gas circuit of igniting one in front and one in back is separated light with burning gas circuit, in order to realize this effect, the independent air feed of gas circuit of igniting in its ignition procedures, burning gas circuit must be in non-for gaseity, herein, because neck bush 220 and front cover 200 are fixed, when block 410 is positioned at the first breach 350 and the second breach 221 simultaneously, under the position-limiting action of the second breach 221, spool 300 cannot rotate, and burning gas circuit cannot be carried out, and prevents burning gas circuit from being lighted while gas circuit of igniting is lighted with this.

When block 410 is only positioned at the first breach 350, because block 410 has departed from the restriction of the second breach 221, under the prerequisite of gas circuit burning of igniting, block 410 can be with movable valve plug 300 to rotate, combustion gas waypoint is fired and carries out intensity of a fire size adjustment, the gas circuit that realizes igniting is with the burning independent air feed of gas circuit and light independent separating.

If it should be noted that herein, burning gas circuit is lighted with gas circuit of igniting simultaneously, then the intensity of a fire is comparatively large instantaneously, there is potential safety hazard.

Further, in the 3rd receiving cavity 210, there is ring-shaped platform 230, on 3rd receiving cavity 210 madial wall, radial convex is provided with the arc bump 211 be connected with ring-shaped platform 230, described neck bush 220 offers the arc notch 222 that its length is less than arc bump 211 length, arc bump 211 to embed in arc notch 222 and makes neck bush 220 front end and be formed with the curve bath 223 communicated with the second breach 221 between ring-shaped platform 230, the length of curve bath 223 is greater than fuel gas hole 320 length, when block 410 is only positioned at the first breach 350, described block 410 can move in curve bath 223.

By offering arc notch 222 on neck bush 220, be arranged on there is corresponding arc bump 211 front cover 200 in, play fixation while, also easy disassembly, block 410 is limited in curve bath 223, make block 410 can only in curve bath 223 transverse shifting and can only moving axially in the second breach 221, block 410 then cannot move axially when being positioned at other position of curve bath 223, prevent burning gas circuit from together being lighted with gas circuit of igniting under gaseity with this, and curve bath 223 length is greater than pore 320 length of igniting, conveniently close gas circuit of igniting, when rotating shaft 400 is rotated and block 410 moves to the scope exceeding the pore 320 that ignites in curve bath 223, gas circuit of igniting air feed disconnects, burner is stopped using.

Further, described ring-shaped platform 230 offers some restraining grooves 231 of being connected with the 3rd receiving cavity 210 madial wall and wherein a restraining groove 231 is corresponding with the second breach 221, when block 410 is mobile in curve bath 223, described block 410 can be fixed in any restraining groove 231.

After gas circuit of igniting is lighted, when block 410 can retreat in the restraining groove 231 corresponding with the second breach 221, can prevent rotating shaft 400 from freely rotating when without the need to rotating, after burning gas circuit is lighted, block 410 can be positioned at other restraining groove 231, makes the intensity of a fire be fixed on desired position.

Further, be threaded in valve body 100 rear end and there is the rear end cover 500 of the 4th receiving cavity 510, in described second receiving cavity 160 and the 4th receiving cavity 510, solenoid valve 600 is installed, solenoid valve 600 rear end is provided with magnet 610, solenoid valve 600 front end is provided with mobile Valve plug 620, Valve plug 620 is connected by valve shaft 630 solenoid valve 600, valve shaft 630 is arranged with two ends and is against Valve plug 620 and the Returnning spring 640 on solenoid valve 600 respectively, when forming magnetic force between magnet 610 and Valve plug 620, Valve plug 620 holds and the first through hole 141 is opened by magnet 610, time between magnet 610 and Valve plug 620 without magnetic force, under Returnning spring 640 acts on, Valve plug 620 moves to initial position and is sealed by the first through hole 141.

Sealed by first through hole 141 by arranging solenoid valve 600, during air feed, the first through hole 141 is opened, and during non-air feed, the first through hole 141 seals, and avoids gas leakage to cause security incident to occur, and ensures burner use safety, gas raw material of simultaneously also avoiding waste.

Further, mandrel 360 is provided with between described Valve plug 620 and rotating shaft 400, blind hole 420 is offered in rotating shaft 400 rear end, offer the second through hole 370 that axis hole 310 is communicated with receiving bore 340 in described spool 300 and mandrel 360 through the second through hole 370, described mandrel 360 one end insertion blind hole 420 is interior and the other end is against on Valve plug 620, when rotating shaft 400 moves axially, Valve plug 620 is pushed open and suction tude 110 is communicated with the first receiving cavity 150 by described mandrel 360.

During burner use, promote rotating shaft 400, Valve plug 620 is pushed open by mandrel 360, and realize ignite gas circuit and burning gas circuit, mandrel 360 plays the effect of boosting, is coordinated with Valve plug 620 by mandrel 360, conveniently realizes and can reuse.

Further, described mandrel 360 leading exterior surface offers circular groove 361, jump ring 362 is provided with in circular groove 361, between receiving bore 340 and jump ring 362, be provided with the first spring 363 be sheathed on mandrel 360, between rotating shaft 400 rear end and jump ring 362, be provided with the second spring 364 be sheathed on mandrel 360.

After Valve plug 620 is opened, gas circuit of igniting is lighted, first spring 363 and the second spring 364 make mandrel 360 and rotating shaft 400 get back to respective initial position after pushing Valve plug 620 open, conveniently regulated by rotating shaft 400 pairs of spools 300, realize lighting and burning gas circuit being regulated of burning gas circuit.

Further, receiving bore 340 interior edge face offers second counter sink 341 coaxial with the second through hole 370, the packing ring 343 being provided with seal ring 342 in second counter sink 341 and being compressed by seal ring 342, described first spring 363 is between packing ring 343 and jump ring 362.

Under the active force of the first spring 363, seal ring 342 is pressed in the second counter sink 341 by packing ring 343, makes to have good sealing between axis hole 310 and receiving bore 340, avoids gas to flow to receiving bore 340 by axis hole 310, prevent the generation of gas leak phenomenon.

The present invention in an initial condition, first breach 350 overlaps with the second breach 221, block 410 is positioned at the second breach 221 and the restraining groove 231 corresponding with the second breach 221 simultaneously and rotating shaft 400 cannot be rotated, first through hole 141 is sealed by Valve plug 620, the tracheae 130 that ignites is communicating state with the pore 320 that ignites, and steam outlet pipe 120 and air outlet hole 330 are non-logical state.

Axially promote rotating shaft 400, block 410 enters in the first breach 350 and the second breach 221 simultaneously, because the second breach 221 and front cover 200 are fixed, now, rotating shaft 400, spool 300 all cannot rotate, steam outlet pipe 120 and air outlet hole 330 are still in non-logical state, mandrel 360 promotes Valve plug 620 and the first through hole 141 is opened under the active force of rotating shaft 400, gas is entered by suction tude 110 and enters through the first through hole 141 tracheae 130 that ignites and forms gas circuit of igniting, under thermoelectric effect effect, Valve plug 620 is held and the first through hole 141 is opened all the time, owing to igniting, pore 320 communicates with the tracheae 130 that ignites all the time, therefore gas supply is constant, now, ignition mechanism in burner gas circuit of igniting is lighted and keeps combustion regime always, form ever-burning flame.

After gas circuit of igniting is lighted, unclamp rotating shaft 400, mandrel 360, rotating shaft 400 returns to initial position under the elastic force effect of the first spring 363 and the second spring 364, touch rotating shaft 400 make block 410 leave corresponding restraining groove 231 and make block 410 only enter in the first breach 350, now, block 410 can rotate in curve bath 223, make spool 300 rotate in the first receiving cavity 150 simultaneously, in spool 300 rotation process, first adjustment hole 331 can alternately communicate with steam outlet pipe 120 with the second adjustment hole 332 and form gas circuit of burning, burning gas circuit is formed is lighted afterwards by ever-burning flame, thus realize burner combustion, rotated by spool 300, the size of adjustable air outlet hole 330, to realize the Flow-rate adjustment of burning gas circuit, thus realize the intensity of a fire size adjustment of burner, when the intensity of a fire reaches required state, unclamp rotating shaft 400, rotating shaft 400 retreats in the restraining groove 231 corresponding to the required intensity of a fire, rotating shaft 400 is not easily rotated and is made the intensity of a fire remain at required state.

Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.

Claims (10)

1. for the flow control valve of burner, the valve body comprising interior sky and the front cover be connected with valve body, it is characterized in that: described valve body outer surface is provided with the suction tude axially staggered, steam outlet pipe and the tracheae that ignites, be provided with in valve body and make its inner spacer block forming the first receiving cavity and the second receiving cavity, spacer block offers the first through hole that the first receiving cavity is communicated with the second receiving cavity, described suction tude communicates with the second receiving cavity, described steam outlet pipe and the tracheae that ignites communicate with the first receiving cavity respectively, spool is provided with in the first receiving cavity, spool rear end offers the axis hole coaxial with the first through hole, ignite pore and the air outlet hole that communicate with axis hole is respectively offered in spool back end outer surface, when spool rotates in the first receiving cavity, the described tracheae that ignites communicates with the pore that ignites and steam outlet pipe communicates with air outlet hole.

2. the flow control valve for burner according to claim 1, it is characterized in that: described in the pore that ignites be bar shaped and be laterally opened in valve core outer surface, the first adjustment hole that described air outlet hole is offered by lateral inclination forms with horizontal vertical the second adjustment hole offered, described first adjustment hole and the second adjustment hole is horizontal is in same level, described first adjustment hole, the second adjustment hole and bar hole all stagger and arrange on the horizontal direction and axial direction of spool.

3. the flow control valve for burner according to claim 1 and 2, it is characterized in that: axially offer receiving bore in spool front end, spool axially offers the first breach communicated with receiving bore, be provided with between spool and front cover and can move axially and run through the rotating shaft of front cover, rotating shaft is convexly equipped with block, described rotating shaft is inserted in receiving bore and block can move in the first breach, when block is positioned at the first breach, described in the tracheae that ignites be in communicating state and steam outlet pipe and air outlet hole communicating state or the state that staggers with the pore that ignites.

4. the flow control valve for burner according to claim 3, it is characterized in that: there is in described front cover the 3rd receiving cavity, 3rd receiving cavity internal fixtion is provided with neck bush, first counter sink coaxial with the first receiving cavity is offered in valve body front end, described neck bush is positioned at spool periphery and neck bush rear end is against the first counter sink place, described neck bush offers and to overlap with the first breach and length is less than the second breach of the first notch length, when block is positioned at the first breach and the second breach simultaneously, the tracheae that ignites is in communicating state with the pore that ignites and steam outlet pipe and air outlet hole are in communicating state.

5. the flow control valve for burner according to claim 4, it is characterized in that: in described 3rd receiving cavity, there is ring-shaped platform, on 3rd receiving cavity madial wall, radial convex is provided with the arc bump be connected with ring-shaped platform, described neck bush offers the arc notch that its length is less than arc bump length, arc bump to embed in arc notch and makes neck bush front end and be formed with the curve bath communicated with the second breach between ring-shaped platform, curve bath length is greater than pore length of igniting, when block is only positioned at the first breach, described block can move in curve bath.

6. the flow control valve for burner according to claim 5, it is characterized in that: described ring-shaped platform offers some restraining grooves of being connected with the 3rd receiving cavity madial wall and wherein a restraining groove is corresponding with the second breach, when block moves in curve bath, block can be fixed in any restraining groove.

7. the flow control valve for burner according to claim 1 or 6, it is characterized in that: be provided with the rear end cover with the 4th receiving cavity in valve body rear end, be provided with solenoid valve in described second receiving cavity and four receiving cavities, solenoid valve front end is provided with can move and the Valve plug that can seal or make the first through hole to open the first through hole.

8. the flow control valve for burner according to claim 7, it is characterized in that: between described Valve plug and rotating shaft, be provided with mandrel, blind hole is offered in rotating shaft rear end, offer the second through hole that axis hole is communicated with receiving bore in described spool and mandrel through the second through hole, described mandrel one end insertion blind hole is interior and the other end is against on Valve plug, when rotating shaft moves axially and block is positioned at the first breach and the second breach simultaneously, Valve plug is pushed open and suction tude is communicated with the first receiving cavity by described mandrel.

9. the flow control valve for burner according to claim 8, it is characterized in that: described mandrel leading exterior surface offers circular groove, jump ring is provided with in circular groove, between receiving bore and jump ring, be provided with the first spring be sheathed on mandrel, between rotating shaft rear end and jump ring, be provided with the second spring be sheathed on mandrel.

10. the flow control valve for burner according to claim 9, it is characterized in that: receiving bore interior edge face offers second counter sink coaxial with the second through hole, be provided with seal ring and the packing ring compressed by seal ring in second counter sink, described first spring is between packing ring and jump ring.