CN218544438U - Anti-backfire assembly, injection pipe and combustor comprising same - Google Patents
Anti-backfire assembly, injection pipe and combustor comprising same Download PDFInfo
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- CN218544438U CN218544438U CN202223042096.7U CN202223042096U CN218544438U CN 218544438 U CN218544438 U CN 218544438U CN 202223042096 U CN202223042096 U CN 202223042096U CN 218544438 U CN218544438 U CN 218544438U
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Abstract
The utility model provides an anti-backfire subassembly, draw and penetrate pipe and include its combustor. The anti-backfire assembly comprises a valve core and an elastic piece; the valve core is movably arranged in the cavity of the injection pipe, and the elastic part is connected with the valve core; when the gas pressure of the mixed gas of the gas and the air entering the ejector pipe is increased, the valve core moves along the airflow direction, and the gap between the valve core and the inner wall of the ejector pipe is increased so that more mixed gas of the gas and the air can pass through the gap; when the gas pressure of the mixed gas of the gas and the air entering the ejection pipe is small, the valve core moves along the direction that the extension pipe is close to the contraction pipe, and the gap between the valve core and the inner wall of the ejection pipe is reduced to avoid the undersize of the air pressure in the ejection pipe. The elastic piece comprises a first end and a second end along the airflow direction, and the valve core is arranged at the second end; the valve core is matched with the inner wall of the injection pipe to realize opening adjustment, so that the tempering phenomenon caused by overlarge air coefficient or insufficient gas pressure is avoided, and the safety of the injection pipe in the using process is ensured.
Description
Technical Field
The utility model relates to an anti-backfire subassembly, draw and penetrate pipe and including its combustor.
Background
When the burner works, fuel gas and air are mixed for the first time through the injection pipe, then enter the fire cover for shunting, and are mixed for the second time with the air for burning. For some special gas sources and special environments, a backfire phenomenon may occur when the burner burns, namely, the combustion occurs in an inner cavity of the stove, particularly in an injection pipe, so that dangerous conditions are caused and the gas stove is damaged.
Meanwhile, the burners on the market generally adopt air doors to adjust the combustion state, the burners do not have the automatic adjustment capability, the flame propagation speed caused by too large air coefficient or insufficient gas pressure is unstable, the adaptability of the combustion state is poor, and the possibility of backfire is increased.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is in order to overcome the unable autonomic regulation combustion state of combustor among the prior art, the inside defect that can appear tempering phenomenon of drawing of combustor, provides an anti-backfire subassembly, draws and penetrates the pipe and reach including its combustor.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme: an anti-flashback assembly, comprising a valve cartridge and a resilient member;
the valve core is movably arranged in the cavity of the injection pipe, and the elastic piece is connected with the valve core;
the injection pipe sequentially comprises an air suction pipe, a contraction pipe and an expansion pipe along the airflow flowing direction, and the elastic part is used for providing elastic force close to the contraction pipe for the valve core;
the elastic piece comprises a first end and a second end along the air flow direction, and the valve core is arranged at the second end;
the valve core is matched with the inner wall of the injection pipe to realize opening degree adjustment.
In the scheme, the anti-backfire component is connected with the valve core through the elastic part, the elastic part is used for providing elastic force close to the shrinkage pipe for the valve core, when the gas pressure of mixed gas of gas and air entering the injection pipe is increased, the valve core moves along the airflow direction, and the gap between the valve core and the inner wall of the injection pipe is increased so as to facilitate more mixed gas of the gas and the air to pass; when the gas pressure of the mixed gas of the gas and the air entering the ejection pipe is small, the valve core moves along the direction that the extension pipe is close to the contraction pipe, and the gap between the valve core and the inner wall of the ejection pipe is reduced to avoid the undersize of the air pressure in the ejection pipe. The gas pressure of the inner wall of the injection pipe is adjusted adaptively through the elastic piece, the phenomenon of tempering caused by overlarge air coefficient or insufficient gas pressure is avoided, and the safety of the injection pipe in the using process is guaranteed.
The injection pipe comprises the anti-backfire assembly.
In this scheme, draw and penetrate intraductal setting of penetrating foretell back fire prevention subassembly, carry out the adjustment of adaptability to the gas pressure who penetrates the inside wall of the pipe through the elastic component, avoid the too big or gas pressure of air coefficient not enough to lead to the emergence of tempering phenomenon, guarantee to penetrate the security of penetrating the pipe in the use.
Preferably, the anti-backfire assembly comprises a first limiting member,
the first limiting part is fixed on the injection pipe, and the elastic part penetrates through the first limiting part.
In this scheme, be fixed in the case with the elastic component through first locating part and draw the ejector tube inside, be provided with the hole of establishing on the first locating part, the elastic component wears to locate the hole of establishing, and the case can be close to or keep away from the shrink tube along the air current direction through the elastic component, realizes and draws the cooperation of ejector tube inner wall to adjust the aperture to reach the effect of stable air coefficient and gas pressure, prevent the emergence of tempering phenomenon, guarantee to draw the security of ejector tube in the use.
Preferably, when the elastic element is in the first limit state, the valve core is located at the first limit position close to the shrinkage pipe, and the valve core is matched with the inner wall of the injection pipe or the first limiting element to realize sealing.
In this scheme, when the tempering phenomenon takes place, the combustion reaction extends to the gas mixing chamber from the combustor nozzle, and the inside temperature in gas mixing chamber rose this moment, and the atmospheric pressure increases the back, promotes the valve core and removes to the direction that is close to the shrink tube to realize sealed with drawing the inside wall cooperation of injection tube, prevent that the gas from entering into gas mixing chamber and continuing to take place the burning. After the fuel gas in the gas mixing chamber is consumed, the tempering phenomenon disappears, and the safety of the injection pipe in the use process is ensured.
Preferably, one end of the valve core facing the upstream of the injection pipe is hemispherical.
In this scheme, the case sets up to the hemisphere near the one end of drawing penetrating pipe upper reaches, can play the effect of water conservancy diversion to the mist of air and gas, and the mist of air and gas gets into to draw penetrates the pipe after, flows through behind the shrink tube atmospheric pressure and reachs the maximum value, back from case orientation draw the one end drainage to the lateral wall of penetrating the upper reaches of pipe to atmospheric pressure reduces. Meanwhile, the valve core of the gas stove can be prevented from being subjected to overlarge acting force when the gas stove is just used, the linear relation between the opening degree of the valve core and the inner wall of the injection pipe and the size of air flow is ensured, and the safety of the injection pipe in the using process is ensured. The valve core is arranged to be hemispherical at one end close to the upper stream of the injection pipe, so that the valve core is matched with the inner wall of the injection pipe, the precision requirement on the valve core manufacturing process is reduced, and the manufacturing cost of the valve core is reduced.
Preferably, the maximum diameter of the outer edge of the valve core is larger than the inner diameter of the narrowest part of the injection pipe.
In the scheme, when the elastic part is in a first limit state, the valve core is located at a first limit position, the first limit position is at a position where the expansion pipe is close to the contraction pipe, the first limit position is abutted with the inner wall of the injection pipe to realize a sealing effect, meanwhile, the valve core is prevented from causing the blockage of the injection pipe, and the safety of the injection pipe in the using process is ensured; the matching of the valve core and the inner wall of the injection pipe is facilitated, the requirement on the precision of the valve core manufacturing process is lowered, and the manufacturing cost of the valve core is reduced.
Preferably, the anti-backfire assembly comprises a second limiting member, and the second limiting member is arranged at the first end;
when the elastic piece is in a second limit state, the valve core is located at a second limit position far away from the shrinkage pipe, and the second limit piece abuts against the elastic piece.
In this scheme, the anti-backfire assembly comprises a second limiting part, the second limiting part is arranged at the first end, and the second limiting part is used for limiting along the airflow direction when the elastic part is in the second limit state. When the elastic member is in the second limit state, the second limit member abuts against the elastic member.
Preferably, the anti-backfire assembly comprises a connecting rod, the second limiting member is fixed to the connecting rod, and the second limiting member extends to the outer edge along the circumferential direction of the connecting rod.
In this scheme, the elastic component cup joints in the connecting rod, and the second locating part is used for being fixed in the connecting rod with the elastic component, and when the elastic component was in second limit state, the second locating part butt in the elastic component, the second locating part was used for the elastic component to be in the spacing of second limit state along the air current direction.
Preferably, the elastic member includes a spring;
and/or the axis of the elastic part is coincided with the axis of the injection pipe.
In this scheme, the elastic component includes the spring, and because of drawing penetrate a pipe during operation ambient temperature change great, adopt the spring to ensure that case and draw and penetrate the aperture and the air current size between the inside wall of casing be linear relation, guarantee to draw the security of penetrating the pipe in the use.
When one elastic piece is adopted, the axis of the elastic piece is superposed with the axis of the injection pipe; when a plurality of elastic elements are combined, the centers of the elastic elements are coincided with the axis of the injection pipe, so that when the valve core is ensured to adjust the opening, the center of the valve core is positioned on the axis of the injection pipe, the abrasion of the valve core on the inner wall of the friction injection pipe in the moving process is avoided, and the service life of the valve core is prolonged.
The burner is characterized by comprising the injection pipe.
In the scheme, the burner is provided with the ejector pipe, the gas pressure of the inner wall of the ejector pipe is adaptively adjusted through the elastic piece, the tempering phenomenon caused by too large air coefficient or insufficient gas pressure is avoided, and the safety of the burner in the using process is ensured.
The utility model discloses an actively advance the effect and lie in: the anti-backfire assembly comprises a valve core and an elastic piece; the valve core is movably arranged in the cavity of the injection pipe, and the elastic part is connected with the valve core; the injection pipe sequentially comprises an air suction pipe, a contraction pipe and an expansion pipe along the airflow flowing direction, and the elastic part is used for providing elastic force close to the contraction pipe for the valve core; the elastic piece comprises a first end and a second end along the airflow flowing direction, and the valve core is arranged at the second end; the valve core is matched with the inner wall of the injection pipe to realize opening adjustment. The anti-backfire assembly is connected with the valve core through the elastic piece, the elastic piece is used for providing elastic force close to the shrinkage pipe for the valve core, when the air pressure of mixed gas of gas and air entering the injection pipe is increased, the valve core moves along the air flow direction, and a gap between the valve core and the inner wall of the injection pipe is increased so that more mixed gas of the gas and the air can pass through the gap; when the gas pressure of the mixed gas of the gas and the air entering the ejector pipe changes little, the valve core moves along the direction that the extension pipe is close to the shrinkage pipe, and the gap between the valve core and the inner wall of the ejector pipe is reduced to avoid the pressure inside the ejector pipe to be too small. The gas pressure of the inner wall of the injection pipe is adaptively adjusted through the elastic piece, so that the tempering phenomenon caused by overlarge air coefficient or insufficient gas pressure is avoided, and the safety of the injection pipe in the using process is ensured.
Drawings
Fig. 1 is a schematic cross-sectional view of an axial direction of an injection pipe according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the ejector tube of FIG. 1;
fig. 3 is a schematic structural view of an anti-backfire assembly according to an embodiment of the present invention.
Valve core 1
Tower spring 22
First limiting part 3
Second limiting part 4
Air suction pipe A
Shrink tube B
Dilation tube C
Detailed Description
The present invention will be more clearly and completely described in the following detailed description of the preferred embodiments in conjunction with the accompanying drawings.
The embodiment of the utility model provides an anti-backfire assembly, as shown in figure 1, the anti-backfire assembly comprises a valve core 1 and an elastic part 2; the valve core 1 is movably arranged in the cavity of the injection pipe 10, and the elastic part 2 is connected with the valve core 1; the injection pipe 10 sequentially comprises an air suction pipe A, a contraction pipe B and an expansion pipe C along the airflow flowing direction, and the elastic part 2 is used for providing elastic force close to the contraction pipe B for the valve core 1; the elastic element 2 comprises a first end and a second end along the air flow direction, and the valve core 1 is arranged at the second end; the valve core 1 is matched with the inner wall of the injection pipe 10 to realize opening adjustment.
In a specific implementation process, as shown in fig. 1, the anti-backfire assembly is connected with the valve core 1 through the elastic part 2, the elastic part 2 is used for providing an elastic force close to the contraction pipe B for the valve core 1, when the gas pressure of the mixed gas of the fuel gas and the air entering the injection pipe 10 is increased, the valve core 1 moves along the airflow direction, and the gap between the valve core 1 and the inner wall of the injection pipe 10 is increased so that more mixed gas of the fuel gas and the air can pass through; when the gas pressure of the mixed gas of the gas and the air entering the injection pipe 10 is small, the valve core 1 moves along the direction that the extension pipe is close to the contraction pipe B, and the gap between the valve core 1 and the inner wall of the injection pipe 10 is reduced to avoid the small pressure inside the injection pipe 10. The gas pressure of the inner wall of the injection pipe 10 is adjusted adaptively through the elastic part 2, the phenomenon of tempering caused by overlarge air coefficient or insufficient gas pressure is avoided, and the safety of the injection pipe 10 in the using process is guaranteed.
The utility model provides an inject and penetrate pipe 10, as shown in figure 1, including foretell anti-backfire subassembly, carry out the adjustment of adaptability to the gas pressure who penetrates pipe 10 inner walls through elastic component 2, avoid the too big or not enough emergence that leads to the phenomenon of tempering of gas pressure of air coefficient, guarantee to penetrate the security of pipe 10 in the use.
As a better implementation manner, as shown in fig. 1 and fig. 2, the anti-backfire assembly includes a first limiting member 3, the first limiting member 3 is fixed to the injection pipe 10, and the elastic member 2 is inserted through the first limiting member 3.
When concrete implementation, be fixed in case 1 and elastic component 2 through first locating part 3 and penetrate tub 10 inside, be provided with the through hole on the first locating part 3, elastic component 2 wears to locate the through hole, case 1 can be close to or keep away from shrink tube B along the air current direction through elastic component 2, realize and penetrate tub 10 inner wall cooperation regulation aperture, with the effect that reaches stable air coefficient and gas pressure, prevent the emergence of tempering phenomenon, guarantee to penetrate the security of tub 10 in the use.
As a preferred embodiment, when the elastic element 2 is in the first limit state, the valve core 1 is located at the first limit position close to the shrinkage pipe B, and the valve core 1 cooperates with the inner wall of the injection pipe 10 or the first limiting element 3 to realize sealing. When the backfire phenomenon occurs, the combustion reaction extends from the nozzle of the burner to the gas mixing chamber, the temperature in the gas mixing chamber rises, after the air pressure is increased, the valve core 1 is pushed to move towards the direction close to the shrinkage pipe B and is matched with the inner wall of the injection pipe 10 to realize sealing, and the gas is prevented from entering the gas mixing chamber to continue to combust. After the fuel gas in the gas mixing chamber is consumed, the tempering phenomenon disappears, and the safety of the injection pipe 10 in the use process is ensured.
The mode that the valve core 1 is matched with the inner wall of the injection pipe 10 or the first limiting part 3 to realize sealing can be matched with the inner wall of the injection pipe 10 to realize sealing as shown in the embodiment, and sealing can also be realized by adopting a mode of being matched with the first limiting part 3. At this moment, first locating part 3 can set up in the one end that shrink pipe B is close to expansion pipe C or set up in expansion pipe C, can with draw and penetrate pipe 10 integrated into one piece and from drawing penetrating pipe 10 inner wall circumference inwards extension, and 1 external diameter of case slightly is less than and penetrates pipe 10 inner wall diameter, and when case 1 was in first extreme position, case 1 realized sealedly with the cooperation of first locating part 3.
As a better implementation mode, as shown in fig. 1, one end of the valve core 1 facing the upstream of the injection pipe 10 is hemispherical, so that a flow guiding effect can be achieved on the mixed gas of air and gas, after the mixed gas of air and gas enters the injection pipe 10, the mixed gas flows through the contraction pipe B, the air pressure reaches a maximum value, and then the mixed gas is guided to the side wall from one end of the valve core 1 facing the upstream of the injection pipe 10, so that the air pressure is reduced. Meanwhile, the gas stove can avoid overlarge acting force on the valve core 1 when the gas stove is just used, the linear relation between the opening degree of the valve core 1 and the inner wall of the injection pipe 10 and the size of air flow is ensured, and the safety of the injection pipe 10 in the using process is ensured. The valve core 1 is arranged to be hemispherical at one end close to the upper stream of the injection pipe 10, so that the valve core 1 is matched with the inner wall of the injection pipe 10, the precision requirement on the valve core 1 manufacturing process is reduced, and the manufacturing cost of the valve core 1 is reduced.
As a preferred embodiment, as shown in fig. 1, the maximum diameter of the outer edge of the valve core 1 is larger than the inner diameter of the narrowest part of the injection pipe 10. When the elastic element 2 is in a first limit state, the valve core 1 is located at a first limit position, the first limit position is located at a position where the expansion pipe C is close to the contraction pipe B, the expansion pipe C is abutted against the inner wall of the injection pipe 10 to achieve a sealing effect, meanwhile, the valve core 1 is prevented from causing internal blockage of the injection pipe 10, and the safety of the injection pipe 10 in the using process is ensured; the matching of the valve core 1 and the inner wall of the injection pipe 10 is facilitated, the requirement on the precision of the valve core 1 manufacturing process is lowered, and the manufacturing cost of the valve core 1 is reduced.
In specific implementation, as shown in fig. 1, the anti-backfire assembly includes a second limiting member 4, the second limiting member 4 is disposed at the first end, and the second limiting member 4 is used for limiting the elastic member 2 along the airflow direction when the elastic member is in the second limit state; when the elastic element 2 is in the second limit state, the valve core 1 is located at the second limit position away from the shrinkage pipe B, and the second limit element 4 abuts against the elastic element 2.
As a preferred embodiment, the anti-backfire assembly includes a connecting rod, the second limiting member 4 is fixed to the connecting rod, and the second limiting member 4 extends to the outer edge along the circumferential direction of the connecting rod. The elastic component 2 is sleeved on the connecting rod, the second limiting component 4 is used for fixing the elastic component 2 on the connecting rod, when the elastic component 2 is in the second limit state, the second limiting component 4 abuts against the elastic component 2, and the second limiting component 4 is used for limiting the elastic component 2 along the air flow direction when the elastic component is in the second limit state.
The second limiting member 4 may be spherical in the embodiment, or may extend to the outer edge along one or more directions of the connecting rod to fix the elastic member 2 and the connecting rod.
As a preferred embodiment, the elastic part 2 comprises a spring 21, and because the ambient temperature changes greatly when the injection pipe 10 works, the spring 21 can ensure that the opening degree between the valve core 1 and the inner wall of the injection pipe 10 and the air flow are in a linear relation, and the safety of the injection pipe 10 in the using process is ensured.
In specific implementation, when one elastic part 2 is adopted, the axis of the elastic part 2 is superposed with the axis of the injection pipe 10; when adopting a plurality of elastic component 2 to make up, the center of a plurality of elastic component 2 should penetrate the coincidence of pipe 10 axis with drawing, when guaranteeing that case 1 adjusts the aperture, the center of case 1 is in and penetrates the axis of pipe 10, avoids case 1 to penetrate the pipe 10 inner wall at the friction and cause wearing and tearing at the removal process, prolongs case 1's life.
As a preferred embodiment, as shown in fig. 3, the elastic member 2 in this embodiment includes a spring 21 and a tower spring 22. When the backfire phenomenon occurs, the combustion reaction extends from the nozzle of the burner to the gas mixing chamber, the temperature in the gas mixing chamber rises at the moment, after the air pressure is increased, the valve core 1 is pushed to move towards the direction close to the shrinkage pipe B, the spring 21 shrinks at the moment, and the sealing is realized by matching with the inner wall of the injection pipe 10, so that the gas is prevented from entering the gas mixing chamber to continue to combust. After the gas in the gas mixing chamber is consumed, the tempering phenomenon disappears, the spring 21 rebounds under the action of the restoring force, a certain opening degree is ensured between the valve core and the inner wall of the injection pipe 10, and the safety of the injection pipe 10 in the using process is ensured. In the use, when the gas pressure of the mixed gas of gas and air increases, the valve core 1 is pushed to move along the airflow direction, the spring 21 is stretched, and the opening degree between the valve core 1 and the inner wall of the injection pipe 10 is increased. The tower spring 22 has a good damping effect, and can ensure that the opening between the inner walls of the valve core 1 and the injection pipe 10 and the air pressure of gas and air are in a linear relation, so that the effect of stabilizing the air coefficient and the gas pressure is achieved, the tempering phenomenon is prevented, and the safety of the injection pipe 10 in the using process is ensured.
The utility model also provides a combustor, including foretell draw and penetrate pipe 10. The gas pressure of the inner wall of the injection pipe 10 is adjusted adaptively through the elastic part 2, so that the phenomenon of tempering caused by too large air coefficient or insufficient gas pressure is avoided, and the safety of the burner in the use process is ensured.
Claims (10)
1. An anti-backfire assembly, characterized in that the anti-backfire assembly comprises a valve core and an elastic member;
the valve core is movably arranged in the cavity of the injection pipe, and the elastic piece is connected with the valve core;
the injection pipe sequentially comprises an air suction pipe, a contraction pipe and an expansion pipe along the airflow flowing direction, and the elastic part is used for providing elastic force close to the contraction pipe for the valve core;
the elastic piece comprises a first end and a second end along the air flow direction, and the valve core is arranged at the second end;
the valve core is matched with the inner wall of the injection pipe to realize opening degree adjustment.
2. An ejector tube, comprising the flashback-preventing assembly of claim 1.
3. The ejector tube according to claim 2, wherein the flashback-preventing assembly includes a first retaining member,
the first limiting part is fixed on the injection pipe, and the elastic part penetrates through the first limiting part.
4. The ejector tube of claim 3, wherein when the elastic member is in the first limit state, the valve core is located at a first limit position close to the shrink tube, and the valve core cooperates with the inner wall of the ejector tube or the first limit member to achieve sealing.
5. The eductor tube of claim 2 wherein the end of the valve core upstream of the eductor tube is hemispherical.
6. The eductor tube of claim 2 wherein the maximum diameter of the outer edge of the valve core is greater than the inner diameter of the narrowest portion of the eductor tube.
7. The ejector tube of claim 2, wherein the flashback-preventing assembly includes a second retaining member disposed at the first end;
when the elastic piece is in a second limit state, the valve core is located at a second limit position far away from the shrinkage pipe, and the second limit piece abuts against the elastic piece.
8. The ejector tube according to claim 7, wherein the anti-backfire assembly includes a connecting rod, and the second retaining member is fixed to the connecting rod and extends along a circumferential direction of the connecting rod toward an outer edge.
9. The ejector tube of claim 2, wherein the resilient member comprises a spring;
and/or the axis of the elastic piece is superposed with the axis of the injection pipe.
10. A burner comprising the ejector tube of any one of claims 2 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223042096.7U CN218544438U (en) | 2022-11-16 | 2022-11-16 | Anti-backfire assembly, injection pipe and combustor comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223042096.7U CN218544438U (en) | 2022-11-16 | 2022-11-16 | Anti-backfire assembly, injection pipe and combustor comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218544438U true CN218544438U (en) | 2023-02-28 |
Family
ID=85263587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223042096.7U Active CN218544438U (en) | 2022-11-16 | 2022-11-16 | Anti-backfire assembly, injection pipe and combustor comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218544438U (en) |
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2022
- 2022-11-16 CN CN202223042096.7U patent/CN218544438U/en active Active
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