CN207316112U - Spool - Google Patents

Abstract

The utility model discloses a kind of spool, including insert body (25), the insert body has spool hollow cavity (23), the spool (1) further includes the spool air inlet adjustment piece for the bottom for being arranged on the insert body, and the spool air inlet adjustment piece is used for the charge flow rate for adjusting the spool hollow cavity.In the spool of the utility model, due to being additionally arranged spool air inlet adjustment piece, therefore, the spool of the utility model is a kind of achievable spool for adjusting the air inflow for entering spool hollow cavity, and the function of air inlet adjustment is realized in the bottom of spool, be conducive to simplify the structure of spool, the structure of the gas valve equipped with the spool further simplified, so as to reduce production cost.

Description

Spool

Technical field

It the utility model is related to household kitchen electric appliance field, and in particular, to a kind of spool.

Background technology

In household gas utensils, generally use gas valve controls stopping, open and adjusting in pipeline for combustion gas Gas, and gas valve has good control characteristic and closes sealing performance, it is ensured that the safe handling of gas kitchen ranges.

Conventional gas valve mainly has 3 gears, is followed successively by 0 °, 90 ° counterclockwise (along sparking direction of rotation) respectively With 180 ° of positions, by adjusting corresponding gear to control the size of flame.Wherein, 0 ° of position is the closed position of the gas valve, That is initial position；90 ° of positions are most big fire position；180 ° of positions are the state of most small fire.In addition, turn gas valve is from 90 ° of positions Put when rotating successively to 0 ° or 180 ° of positions, be gradually reduced for the intensity of a fire, and at 180 °, outer ring fire is closed and interior middle ring fire is in most Small state.For this reason, gas valve of the prior art, in the rotation process of spool, since the gas flow of air inlet can not obtain To good control, and then the change of each ring fire gesture is uneven, and gear is less, and user is difficult to adjust the fire wanted to oneself Gesture causes user experience not good enough, it is necessary to bend over to check.

Utility model content

The purpose of this utility model is to provide a kind of adjustable spool into spool hollow cavity air inflow.

To achieve these goals, the utility model provides a kind of spool, including insert body, the insert body have valve Core hollow cavity, the spool further include the spool air inlet adjustment piece for the bottom for being arranged on the insert body, the spool air inlet Adjustment sheet is used for the charge flow rate for adjusting the spool hollow cavity.

Preferably, the insert body includes the spool bottom wall as the spool air inlet adjustment piece, the spool bottom wall Equipped with spool air inlet.

Preferably, the spool bottom wall is integrally formed with the insert body.

Preferably, the spool air inlet is described interior in fan ring-type and including radially spaced inner circle camber line and Section of Outer Ring Line Circular arc line is the concentric circles segmental arc concentric with the spool, and the Section of Outer Ring Line includes starting gradual change line segment and draws close gradual change line segment, The circumferential initiating terminal of starting gradual change line segment from the spool air inlet extends radially outwardly, and the gradual change line segment of drawing close is from institute The circumferential ends for stating end towards the spool air inlet of starting gradual change line segment are extended radially inwardly and radially moved closer to The inner circle camber line.

Preferably, the starting gradual change line segment is straightway, and the gradual change line segment of drawing close is segmental arc.

Preferably, the center of circle angular region of the starting gradual change line segment is 30 °~60 °, the center of circle for drawing close gradual change line segment Angular region is 120 °~180 °.

Preferably, the spool air inlet is the rectangular aperture radially extended.

Preferably, the spool air inlet adjustment piece is for the lock for the bottom opening for covering or opening the spool hollow cavity Door, or the spool air inlet adjustment piece are equipped with spool air inlet and the gate for covering or opening the spool air inlet.

Preferably, the periphery wall of the spool is equipped with multiple grooves, and multiple grooves are respectively communicated with the spool Cavity and axially spaced apart from each other.

Preferably, the groove is incomplete annular groove, and the groove is interior formed with the perforation for connecting the spool hollow cavity Hole.

Through the above technical solutions, in the spool of the utility model, due to being additionally arranged spool air inlet adjustment piece, this The spool of utility model is a kind of achievable spool for adjusting the air inflow for entering spool hollow cavity, and is real in the bottom of spool Show the function of air inlet adjustment, be conducive to simplify the structure of spool, further simplify the knot of the gas valve equipped with the spool Structure, so as to reduce production cost.

Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.

Brief description of the drawings

Attached drawing is to be used to provide a further understanding of the present invention, and a part for constitution instruction, and following Embodiment be used to explain the utility model together, but do not form the limitation to the utility model.In the accompanying drawings：

Fig. 1 is the stereogram according to the spool of the preferred embodiment of the utility model；

Fig. 2 be according to a kind of bottom view of the spool of preferred embodiment of the utility model, illustrated in figure spool into The shape of gas port；

Fig. 3 is according to the bottom view of the spool of another preferred embodiment of the utility model, and spool is illustrated in figure The shape of air inlet；

Fig. 4 is according to the top view of the valve body of the gas valve of the preferred embodiment of the utility model, and valve is illustrated in figure The structure in intracavitary portion；

Fig. 5 is according to the structure diagram of the valve body of the gas valve of the preferred embodiment of the utility model, is shown in figure The position of valve rod and total air inlet；

Fig. 6 is according to the structure diagram of the gas valve of the preferred embodiment of the utility model, and gas valve includes 3 sprays Mouth；

Fig. 7 is the stereogram of spool；

Fig. 8 is the front view of spool；

Fig. 9 is the front view of spool；

The sectional view of the gas valve of Figure 10 preferred embodiments according to the present utility model；

The sectional view of the gas valve of Figure 11 preferred embodiments according to the present utility model；

Figure 12 a~Figure 12 e are the sectional view according to the gas valve of the preferred embodiment of the utility model (along spool bottom Wall), illustrate in figure corresponding each heavy when spool rotates 0 °, 90 °, 200 °, 220 ° and 235 ° in the counterclockwise direction successively Folded aperture area；

Figure 13 a~Figure 13 e are respectively the partial enlarged view of each state of part A~E of Figure 12 a~Figure 12 e；

Figure 14 is the floor map being unfolded along axle center of spool；

Figure 15 is the floor map being unfolded along axle center of valve chamber, and the position of each gas port is closed in main presentation valve chamber in figure System.

Description of reference numerals

1 valve body, 2 spool

3 overlapping openings area, 4 valve rod

56 circumferential seal circles of elastic pre-press

7 nozzle, 12 valve chamber

13 valve chamber bottom wall, 14 total air inlet

21 spool bottom wall, 22 groove

23 spool hollow cavities

25 insert body, 71 inner ring nozzle

72 middle ring nozzle, 73 outer shroud nozzle

131 valve chamber air inlet, 211 spool air inlet

212 inner circle camber line, 213 Section of Outer Ring Line

214 starting gradual change line segments 215 draw close gradual change line segment

161 inner ring gas port, 162 middle ring gas port

163 outer shroud gas ports

221 inner ring groove, 222 middle ring groove

223 peripheral grooves

Embodiment

Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be appreciated that herein Described embodiment is only used for describing and explaining the present invention, and is not intended to limit the present invention.

In the utility model, in the case where not making conversely explanation, the noun of locality such as " upper and lower, top, bottom " used is usually It is each component mutual alignment either on vertical, vertical or gravity direction for direction shown in the drawings Relationship description word.

For gas valve charge flow rate adjustment structure it is complex the problems such as, the utility model provides a kind of spool, As shown in Figure 1, the spool 2 includes insert body 25, which has spool hollow cavity 23, and spool 2 further includes setting Spool air inlet adjustment piece in the bottom of insert body 25, spool air inlet adjustment piece are used for the inlet air flow of adjusting spool hollow cavity 23 Amount, to realize that total air inflow of gas valve is adjusted.

By adding spool air inlet adjustment piece, the combustion gas tolerance into spool hollow cavity 23 is can control, so that in this spool During applied to gas valve, total air inflow of adjustable fuel gas valve, and then the existing distribution flow passage structure of conventional valve body can be simplified Deng.

Wherein, the structure of spool air inlet adjustment piece, form can have various.For example, spool air inlet adjustment piece can be used for The gate of the bottom opening of capping or opening spool hollow cavity 23, or spool air inlet adjustment piece are equipped with 211 He of spool air inlet For covering or opening the gate of spool air inlet 211, so as to by the aperture of gate adjusting spool air inlet 211, to adjust Charge flow rate of the section into spool hollow cavity 23.

However, to cause compact-sized, miniaturization, in a kind of spool 2 of specific preferred embodiment of the utility model, such as Shown in Fig. 1, Fig. 2, insert body 25 includes spool bottom wall 21 as spool air inlet adjustment piece, spool bottom wall 21 equipped with spool into Gas port 211.Spool air inlet 211 follows spool 2 to rotate as rotation opening, correspondingly, can separately set permanent opening (example Such as the valve chamber air inlet 131 of Fig. 4), by rotating opening and the intersection (weight i.e. shown in Figure 13 b~Figure 13 e of permanent opening Run open area 3 jointly) size carry out total air inflow of regulating gas valve, will also be specifically described below.

Preferably, this spool bottom wall 21 is integrally formed with insert body 25, manufacture easy to process.

Wherein, the structure of spool air inlet 211 and shape can have diversified forms, in a kind of spool of preferred constructive form In air inlet 211, as shown in Fig. 2, spool air inlet 211 is in substantially fan ring-type and including radially spaced 212 He of inner circle camber line Section of Outer Ring Line 213, inner circle camber line 212 are the concentric circles segmental arc concentric with spool 2, and Section of Outer Ring Line 213 includes 214 He of starting gradual change line segment Gradual change line segment 215 is drawn close, starting gradual change line segment 214 extends radially outwardly from the circumferential initiating terminal of spool air inlet 211, draws close gradually The circumferential ends for becoming line segment 215 from end towards the spool air inlet 211 of starting gradual change line segment 214 extend radially inwardly and along footpath To moving closer to inner circle camber line 212.

When spool 2 in gas valve rotary work, combustion gas from positioned at starting gradual change line segment 214 spool air inlet 211 into It is fashionable, since starting gradual change line segment 214 gradually extends radially outwardly so that the distance between inner circle camber line 212 and Section of Outer Ring Line 213 It is more and more wider, so that spool air inlet 211 and the coinciding openings area 3 of valve chamber air inlet 131 become larger so that combustion gas enters Amount is relatively increasing.When gradual change line segment 215 is drawn close on edge continues rotation, due to drawing close gradual change line segment 215 gradually radially-inwardly Close to Section of Outer Ring Line 213 so that valve chamber air inlet 131 and the coinciding openings area 3 of spool air inlet 21 taper into, and combustion gas enters Amount is relatively less and less, so as to control the gas inlet amount for entering spool hollow cavity 23.

Simultaneously as starting gradual change line segment 214 and draw close gradual change line segment 215 relative to 212 gradual extension of inner circle camber line or Close linear change, hence in so that the air inflow of the combustion gas can linear increasing or decreasing so that gas valve is from igniting shape Then state linear change tapers into, finally the fray-out of flame without combustion gas entrance from most big fire state again to most big fire.

Preferably, it is straightway to originate gradual change line segment 214, and it is segmental arc to draw close gradual change line segment 215, to realize preferably fire The linear gradient of gesture is adjusted.

Further, the central angle for originating gradual change line segment 214 ranges preferably from 30 °~60 °, the angle for gas valve most Preferred air inlet angle scope before big fire position；The central angle for drawing close gradual change line segment 215 ranges preferably from 120 °~180 °, the angle Spend to be rotated from most big fire position to the adjustable extent of minimum fire screen position.

The spool air inlet 211 of another preferred form, as shown in figure 3, spool air inlet 211 can be to radially extend Rectangular aperture.That is valve chamber air inlet 131 and the shape of spool air inlet 21 exchanges.

On this basis, in the spool 2 of the utility model, as shown in Figure 1, the periphery wall of spool 2 is equipped with multiple ditches Groove 22, multiple grooves 22 are respectively communicated with spool hollow cavity 23 and axially spaced apart from each other, with the different multiple combustion gas runners of correspondence.When Combustion gas is entered into after spool hollow cavity 23 from the spool 2 with adjustable air inflow, can be directly from each groove 22 flow to each nozzle 7, so as to meet the function of the intensity of a fire synchronization gradual change of each runner adjusting so that spool, valve body structure It is more simplified.

Preferably, groove 22 is incomplete annular groove, and groove 22 is interior formed with the through hole for connecting spool hollow cavity 23, so that Obtaining to rotate by spool 2 controls the on or off of each 22 corresponding runner of groove to control, and will also be specifically described below.

Likewise, the utility model additionally provides a kind of valve body of gas valve, as shown in Figure 4 and Figure 5, which includes Valve body 1 with valve chamber 12, valve body 1 are equipped with total air inlet 14 and valve chamber air inlet adjustment structure, and valve chamber air inlet adjustment structure is used for Adjust the gas flow for entering valve chamber 12 from total air inlet 14.

It is multiple without redesigning to adjust the gas flow for being passed through valve chamber 12 by adding valve chamber air inlet adjustment structure Miscellaneous combustion gas distributes runner etc. to adjust the assignment of traffic and size of each combustion gas runner, simplifies the structure of gas valve.

Usually, valve body 1 is equipped with the inlet chamber positioned at the lower section of valve chamber 12, and total air inlet 14 connects inlet chamber, so that valve chamber Air inlet adjustment structure may be provided between valve chamber 12 and inlet chamber.

Total air inlet 14 of gas valve is generally arranged at the side wall close to 2 bottom of valve body, as shown in figure 4, new in this practicality In the gas valve of type, valve body 1 includes the valve chamber bottom wall 13 as valve chamber air inlet adjustment structure, and valve chamber bottom wall 13 is equipped with valve chamber air inlet Mouth 131, so that after combustion gas enters from total air inlet 14, it is opposite from the valve chamber air inlet 131 of valve chamber bottom wall 13 by adjusting Air inlet, carrys out the combustion gas that timely adjustment enters valve chamber 12.

Preferably, valve chamber bottom wall 13 is integrally formed with valve body 1, manufacture easy to process.

Wherein, the structure of valve chamber air inlet 131 and shape can have diversified forms.As it was previously stated, a kind of preferred real Apply in mode, the valve chamber air inlet 131 as permanent opening is preferably the rectangular aperture radially extended, to coordinate spool Rotation opening, so as to adjust the charge flow rate into valve chamber 12 by the change of the two coinciding openings area.

Wherein, valve chamber air inlet 131 can be the valve chamber air inlet mouth region on through hole or valve chamber bottom wall 13 The densely covered pore in domain.

In another preferred embodiment, valve chamber bottom wall 13, which can be equipped with, to be used to covering or opening valve chamber air inlet 131 Gate.Alternatively, valve chamber air inlet adjustment structure is for the gate valve mechanism for the bottom opening for covering or opening valve chamber 12.Pass through gate The aperture of valve chamber air inlet 131 is adjusted, to adjust the charge flow rate into valve chamber 12.

As shown in fig. 6, gas valve includes multiple nozzles 7, valve body 1 is equipped with from valve chamber 12 and is respectively communicated to each nozzle 7 Runner, multiple runners are on the internal perisporium of valve chamber 12 formed with corresponding gas port to supply to each nozzle 7.Due to new in this practicality The gas valve of type is additionally arranged valve chamber air inlet adjustment structure, therefore, can simplify the structure of valve body 1 and spool 2, no distributed amongst chamber And its transition runner etc., combustion gas can be directly assigned to each nozzle of each runner.

It is complicated for gas valve of the prior art on the basis of more than, there is the narrow bandwidth for adjusting the intensity of a fire, do not have Realize in, in, outer ring fire three enclose the intensity of a fire be adjusted in synchronism so that it is difficult to grasp intensity of a fire size, it is necessary to bend over viewing it is desired to adjust Firepower etc. the problems such as, the utility model provides a kind of Novel gas valve.Referring to Fig. 4 to Fig. 7, which includes valve body 1 With hollow valve core 2, spool 2 is pivotally disposed in the valve chamber 12 of valve body 1, and valve chamber 12 is included equipped with valve chamber air inlet 131 Valve chamber bottom wall 13, spool 2 include the spool bottom wall 21 equipped with spool air inlet 211, and spool bottom wall 21 is laminated in valve chamber bottom wall 13 Top can simultaneously be rotated relative to valve chamber bottom wall 13, to pass through the overlapping openings face of valve chamber air inlet 131 and spool air inlet 211 Accumulate the change of 3 (referring to Figure 12 a to 12e) and adjust 12 air inlet of valve chamber.

Therefore, in the gas valve of the utility model, rotary spool 2 is passed through so that spool air inlet 211 and valve chamber air inlet Air inlet aperture (overlapping openings area 3) adjustment structure of rotatable engagement is formed between mouth 131, to adjust the valve to the gas valve 12 air inlet of chamber.

By conventional design, gas valve needs to realize lights a fire to most big fire from charge combustion, is then converted into most small fire again.Cause This, according to air inflow adjust requirement, it is preferable that spool 2 along sparking direction of rotation integral cycle rotating during, spool air inlet Overlapping openings area 3 between 211 and valve chamber air inlet 131 is started from scratch gradual increase, is then gradually decrease to zero.Meanwhile Preferably linearly gradually changed due to overlapping openings area 3 so that user is easier to control the intensity of a fire size of the gas valve.

In order to enable in spool 2 along the above-mentioned overlapping openings area 3 during the integral cycle rotating of sparking direction of rotation into line Property change (become larger and tapered into again to zero from zero), the structure of corresponding spool air inlet 211 and valve chamber air inlet 131 and There should be certain design to coordinate between shape to require, and there can be diversified forms.For example, the valve chamber air inlet 131 to cooperate A kind of preferred embodiment with spool air inlet 211 is：Valve chamber air inlet 131 (referring to Fig. 4) is the rectangle radially extended Opening, spool air inlet 211 are to include radially spaced inner circle camber line 212 and the fan ring-type of Section of Outer Ring Line 213 is opened (referring to Fig. 2) Mouthful.

Further, for the rotatable engagement relation between valve chamber air inlet 131 and spool air inlet 211, valve chamber The radical length of air inlet 131 is more than the maximum radial length of spool air inlet 211, when overlapping openings area 3 is more than zero, valve chamber The radial inside edge of air inlet 131 and inner circle camber line 212 are tangent or radial inside edge are at least partially disposed at inner circle camber line 212 Radially inner side, the radial outside for being at least partially disposed at Section of Outer Ring Line 213 of the radial outside edge of valve chamber air inlet 131.So may be used So that in 2 rotary course of spool, in the inner circle camber line 212 of spool air inlet 211 and remaining unchanged for valve chamber air inlet 131 In the case of, its overlapping openings area 3 can change according to the change of the radial width of Section of Outer Ring Line 213, to meet that this practicality is new The charge flow rate of the gas valve of type realizes linear change.

Certainly, it is corresponding to meet the linearly change (become larger and tapered into again to zero from zero) of overlapping openings area 3 The structure type of valve chamber air inlet 131 and spool air inlet 211 is not limited to above-mentioned shape, can also be valve chamber air inlet 131 and valve Core air inlet 211 is the structure of densely covered pore.During Spool rotating, according to the alignment area of the densely covered pore coordinated each other come Control overlapping openings area 3 linearly changes.In addition, the planform of valve chamber air inlet 131 and spool air inlet 211 can be with Exchange, such as, spool air inlet 211 is the rectangular aperture radially extended, and valve chamber air inlet 131 is opened for fan ring-type substantially Mouthful.

According to the operating habit of user, in general, 0 ° when spool 2 rotates is closed position, 90 ° are most big fire position, Realize that never combustion gas enters the process for gradually having combustion gas to enter, arrive maximum combustion gas entrance again between 0 °~90 °, 90 °~ Realized between 180 ° from most big fire to the process of most small fire.Thus, in the gas valve of the utility model, gradual change line segment is originated 214 central angle ranges preferably from 30 °~60 °, to meet the usual operation of user；And draw close the central angle of gradual change line segment 215 Range preferably from 120 °~180 ° so that the process from most big fire to most small fire is longer, to increase the bandwidth of intensity of a fire adjusting, it is sufficient to Meet that user precisely adjusts the requirement of the intensity of a fire so that design is humanized, convenient operation.Therefore user can be easily found institute The intensity of a fire size needed, and the intensity of a fire is watched without bending over again, user experience is more preferable.

As shown in Figure 10 and Figure 11, gas valve includes being installed on the top of valve body 1 and drives the rotating valve rod 4 of spool 2, valve rod Bottom and spool 2 top between be equipped with elastic pre-press 5, which is arranged to keep the elasticity of spool bottom wall 21 to press Lean against on valve chamber bottom wall 13, so as to avoid forming gap between two bottom walls, cause combustion gas by gap (rather than through lap over Aperture area 3) entered in the form of gas leakage in valve chamber.

Further, to prevent the obstructed lap over aperture area 3 of the gas leakage of valve chamber air inlet 131 to be directly entered valve chamber, Circumferential seal circle 6 is equipped between the bottom internal perisporium of valve chamber 12 and the bottom periphery wall of spool 2.

Referring to Fig. 5, valve body 1 is equipped with total air inlet 14 and the inlet chamber (not shown) positioned at the lower section of valve chamber bottom wall 13, Total air inlet 14, inlet chamber and valve chamber air inlet 131 are sequentially communicated.

Similarly, gas valve includes multiple nozzles 7, and valve body 1 is equipped with the runner that each nozzle 7 is respectively communicated with from valve chamber 12, The periphery wall of spool 2, which is equipped with, is respectively communicated with spool hollow cavity 23 and axial spaced multiple grooves 22, multiple grooves 22 Correspond in corresponding gas port of multiple runners on the internal perisporium of valve chamber 12 to supply to each nozzle 7.

Gas valve can be twin-jet nozzle or three form of nozzle shown in Fig. 6 to Fig. 9, i.e. nozzle 7 include interior ring spray Mouth 71, middle ring nozzle 72 and outer shroud nozzle 73, groove 22 include inner ring groove 221, middle ring groove 222 and peripheral groove 223, stream Road includes inner ring runner, middle ring runner and outer shroud runner, the internal perisporium of inner ring runner, middle ring runner and outer shroud runner in valve chamber 12 It is respectively formed with inner ring gas port 161, middle ring gas port 162 and outer shroud gas port 163.When combustion gas is by can be with regulating gas inlet After rotatable engagement valve chamber air inlet 131 and spool air inlet 211 enter spool hollow cavity 23, then successively from each groove of spool 2 22, which flow through each runner, flows to each nozzle 7, to realize that interior, neutralizing the outer tricyclic intensity of a fire, synchronously change is adjusted so that the knot of the gas valve Structure is more simple.

Wherein, as shown in figure 14, inner ring groove 221, middle ring groove 222 and peripheral groove 223 are incomplete annular groove, are made The each groove 22 of on or off and corresponding gas port can be controlled by the rotation of spool 2 by obtaining, to be reached by the rotation of spool 2 Cause each runner of on or off.

As shown in figure 15, inner ring gas port, middle ring gas port and outer shroud gas port can be spaced 90 ° successively on the internal perisporium of valve chamber.

Such as Figure 12 a to Figure 12 c and as shown in Figure 13 a to Figure 13 c of its enlarged drawing, usually, along sparking direction of rotation, Spool 2 is rotated to ignition location (see Figure 12 a and Figure 13 a), most big fire position successively from closed position (see Figure 12 b and Figure 13 b) Most small fire position (see Figure 12 c and Figure 13 c).Wherein, when rotating from ignition location to most big fire position, overlapping openings area 3 Largest face product value gradually is increased to from zero, inner ring groove 221, middle ring groove 222 and peripheral groove 223 are respectively communicated with inner ring gas port 161st, middle ring gas port 162 and outer shroud gas port 163；When rotating from most big fire position to most small fire position, overlapping openings area 3 is from most Large area value is gradually decrease to the first setting area value, and inner ring groove 221, middle ring groove 222 and peripheral groove 223 keep difference Connect inner ring gas port 161, middle ring gas port 162 and outer shroud gas port 163.

Especially, in the gas valve of the utility model, as shown in Figure 12 d and Figure 13 d, can also be wrapped along sparking direction of rotation Include the fiery position in outer shroud pass being arranged at intervals at after most small fire position, when rotating position fiery to outer shroud pass from most small fire position, weight Folded aperture area 3 is gradually decrease to the second setting area value, inner ring groove 221 and middle ring groove 222 from the first setting area value Holding is respectively communicated with inner ring gas port 161 and middle ring gas port 162, and peripheral groove 223 staggers with 163 position of outer shroud gas port.

Meanwhile as shown in Figure 12 e and Figure 13 e, especially, it may also include along sparking direction of rotation and be arranged at intervals at outer shroud pass Rotation extreme position after fiery position, when closing fiery position from outer shroud and rotating to rotation extreme position, overlapping openings area 3 is from the Two setting area values are gradually decrease to minimal face product value, and inner ring groove 221 keeps connection inner ring gas port 161, and peripheral groove 223 is protected Hold and stagger with 163 position of outer shroud gas port, middle ring groove 222 staggers with 162 position of middle ring gas port.At this time, spool 2 is rotated to 235 ° Position, outer, the middle equal OFF state of ring fire, when spool 2 is in rotation extreme position, only interior ring fire is burnt with minimum state.

Rotated above from most small fire position to outer shroud and close the intensity of a fire of fiery position and rotation extreme position to adjust band be this practicality The preferred frequency range of Novel gas valve, since the gas valve of the utility model can adjust each ring fire gesture with the small work(in Datong District to be a kind of Can, on this basis, further so that the angular range of its synchronous adjustment is sufficiently wide, gear is more, design is humanized.

With reference to such scheme, the gas valve of the preferred embodiment of the utility model, be it is a kind of have realize from 90 ° to In 200 °, in, the gas valve of outer three ring fires stepless time adjustment, wherein, 0 ° of position is starting closed position；90 ° for it is interior, in, outer three The most big fire position of ring fire；200 ° for it is interior, in, the most small fire position of outer three ring fire；220 ° are outer ring fire closed position, it is interior, in Three ring fires are minimum state；235 ° are rotation extreme position, and only interior ring fire is minimum state, other each ring fires are closed.

The preferred embodiment of the utility model, still, the utility model and unlimited are described in detail above in association with attached drawing Detail in the above embodiment, can be to the skill of the utility model in the range of the technology design of the utility model Art scheme carries out a variety of simple variants, these simple variants belong to the scope of protection of the utility model.

It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is to each The possible combination of kind no longer separately illustrates.

In addition, it can also be combined between a variety of embodiments of the utility model, as long as it is not disobeyed The thought of the utility model is carried on the back, it should equally be considered as content disclosed in the utility model.

Claims (10)

1. a kind of spool, including insert body (25), which has spool hollow cavity (23), it is characterised in that The spool (1) further includes the spool air inlet adjustment piece for the bottom for being arranged on the insert body (25), and the spool is into controlled atmosphere Nodal plate is used for the charge flow rate for adjusting the spool hollow cavity (23).

2. spool according to claim 1, it is characterised in that the insert body (25) includes being used as the spool air inlet The spool bottom wall (21) of adjustment sheet, the spool bottom wall (21) are equipped with spool air inlet (211).

3. spool according to claim 2, it is characterised in that the spool bottom wall (21) and the insert body (25) one It is body formed.

4. spool according to claim 2, it is characterised in that the spool air inlet (211) is in fan ring-type and including footpath To the inner circle camber line (212) and Section of Outer Ring Line (213) at interval, the inner circle camber line (212) is and concentric concentric of the spool (1) Arc section, the Section of Outer Ring Line (213) include starting gradual change line segment (214) and draw close gradual change line segment (215), the starting transition line Section (214) from the spool air inlet (211) circumferential initiating terminal extend radially outwardly, it is described draw close gradual change line segment (215) from The circumferential ends of end towards the spool air inlet (211) of the starting gradual change line segment (214) extend radially inwardly and edge Radially move closer to the inner circle camber line (212).

5. spool according to claim 4, it is characterised in that the starting gradual change line segment (214) is straightway, described to lean on It is segmental arc to hold together gradual change line segment (215).

6. spool according to claim 4, it is characterised in that it is described starting gradual change line segment (214) center of circle angular region be 30 °~60 °, the center of circle angular region for drawing close gradual change line segment (215) is 120 °~180 °.

7. spool according to claim 2, it is characterised in that the spool air inlet (211) is the square radially extended Shape opening.

8. spool according to claim 1, it is characterised in that the spool air inlet adjustment piece is for covering or opening institute State the gate of the bottom opening of spool hollow cavity (23), or the spool air inlet adjustment piece be equipped with spool air inlet (211) and For covering or opening the gate of the spool air inlet (211).

9. the spool according to any one in claim 1~8, it is characterised in that the periphery wall of the spool is equipped with Multiple grooves (22), multiple grooves (22) are respectively communicated with the spool hollow cavity (23) and axially spaced apart from each other.

10. spool according to claim 9, it is characterised in that the groove (22) is incomplete annular groove, the groove (22) formed with the through hole for connecting the spool hollow cavity (23) in.