CN211372603U - Fire gas stopping mechanism and gas heater - Google Patents

Abstract

The utility model discloses a mechanism and gas room heater of cutting off gas of catching fire relates to gas safety technical field. The fire gas-break mechanism comprises a valve and a sensing part, wherein the valve comprises a valve body, a sealing head and an elastic part, the valve body is provided with a gas inlet, a valve cavity and a gas outlet which are sequentially communicated, the gas outlet is used for communicating with a combustion mechanism, the sealing head and the elastic part are both arranged in the valve cavity, the elastic part is respectively connected with the sealing head and the inner wall of the valve cavity, the sealing head is used for moving in the valve cavity and sealing the gas inlet or the gas outlet under the elastic force action of the elastic part, the sensing part is connected with the sealing head, and the sensing part is used for keeping the sealing head in a stop state and keeping the gas outlet and the gas inlet communicated when the ambient temperature; or the sealing head is released when the sensed environmental temperature is higher than the preset temperature, so that the sealing head seals the air inlet or the air outlet. The fire gas stopping mechanism and the gas warmer have the characteristic of automatically and timely cutting off a gas source under the condition of fire.

Description

Fire gas stopping mechanism and gas heater

Technical Field

The utility model relates to a gas safety technical field particularly, relates to a mechanism and gas room heater of cutting off gas on catching fire.

Background

The gas warmer, the gas burner and the gas water heater are all devices which directly generate heat by burning gas, the safety of the devices is very important, and particularly under the condition of accidental fire, casualties and property loss are likely to be caused by timely cutting off a gas source.

In view of the above, it is important to develop a fire stopping mechanism and a vertical gas warmer for solving the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mechanism of cutting off gas catches fire, it has the characteristics that can in time cut off the air supply automatically under the state of catching fire.

Another object of the utility model is to provide a gas warmer, it has the characteristics that can in time cut off the air supply automatically under the state of catching fire.

The utility model provides a technical scheme:

in a first aspect, an embodiment of the present invention provides a fire stopping mechanism, which includes a valve and an induction portion, the valve comprises a valve body, a sealing head and an elastic piece, wherein the valve body is provided with an air inlet, a valve cavity and an air outlet which are communicated in sequence, the air inlet is used for being communicated with an air source, the air outlet is used for being communicated with a combustion mechanism, the sealing head and the elastic piece are both arranged in the valve cavity, the elastic piece is respectively connected with the sealing head and the inner wall of the valve cavity, the sealing head is used for having the trend of moving in the valve cavity under the action of the elastic force of the elastic piece, so as to seal the air inlet or the air outlet, the sensing part is connected with the sealing head, and the sensing part is used for sealing the air inlet or the air outlet when the ambient temperature is lower than or equal to the preset temperature, keeping the sealing head in a stop state, and keeping the air outlet communicated with the air inlet; or when the sensed environmental temperature is higher than the preset temperature, releasing the sealing head to enable the sealing head to seal the air inlet or the air outlet.

With reference to the first aspect, in a first implementation manner of the first aspect, the sensing portion is a flammable rope, the flammable rope is connected with the sealing head, and the flammable rope is configured to be disconnected when the temperature of the flammable rope is higher than the preset temperature so as to release the sealing head.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in a second implementation manner of the first aspect, the fire gas shutoff mechanism includes an induction assembly, and the induction assembly includes the induction portion and an induction frame; one end of the induction frame is connected with the valve body, the other end of the induction frame is connected with the induction part, and a gap is reserved between the middle part of the induction part and the induction frame.

With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, the induction assembly further includes a threaded connector, and the threaded connector is rotatably and threadedly connected to the induction frame; the induction part passes through threaded connection spare with the response frame is connected, just threaded connection spare follows the extending direction setting of induction part.

With reference to the first aspect and the foregoing implementation manner, in a fourth implementation manner of the first aspect, the induction frame includes a first connection portion, a second connection portion, and a third connection portion, which are connected in sequence, and the first connection portion, the second connection portion, and the third connection portion are arranged in a shape of a letter; the valve body is connected with the first connecting portion, the sensing portion is connected with the third connecting portion and located between the first connecting portion and the second connecting portion, and a gap is formed between the sensing portion and the third connecting portion.

With reference to the first aspect and the foregoing implementation manner, in a fifth implementation manner of the first aspect, the sensing assembly further includes a flexible wire and a flexible guide tube, and two ends of the flexible guide tube are respectively connected to the valve body and the sensing frame to connect the sensing frame and the valve body; the flexible wire is movably arranged in the flexible guide pipe, and two ends of the flexible wire are respectively connected with the sealing head and the sensing part to be connected with the sensing part and the sealing head.

With reference to the first aspect and the foregoing implementation manner, in a sixth implementation manner of the first aspect, one end of the flexible wire, which is far away from the induction frame, is rotatably connected to the sealing head.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in a seventh implementation manner of the first aspect, the elastic member is elastically deformed and compressed between the seal head and an inner wall of the valve chamber.

With reference to the first aspect and the foregoing implementation manner, in an eighth implementation manner of the first aspect, the valve cavity is a cylindrical space, the air outlet is disposed at a side surface of the cylindrical space, the air inlet is disposed at one end of the cylindrical space, and the sealing head and the elastic member are both located at the other end of the cylindrical space; the sealing head comprises a sealing ring and a sealing part, the sealing part is connected with the sensing part, a sealing groove is annularly arranged on the sealing part, the sealing ring is sleeved on the sealing groove, the sealing part is coaxially arranged with the valve cavity, the sealing ring is abutted to the inner wall of the valve cavity, and the sealing head can move towards the air inlet under the action of elastic force of the elastic piece and cross over the air outlet to seal the air inlet.

In a second aspect, an embodiment of the present invention further provides a gas warmer, including a combustion mechanism and the misfire gas shutoff mechanism, the misfire gas shutoff mechanism includes a valve and a sensing portion, the valve includes a valve body, a sealing head and an elastic member, the valve body has an air inlet, a valve cavity and an air outlet which are sequentially connected, the air inlet is used for communicating with an air source, the air outlet is communicated with the combustion mechanism, the sealing head and the elastic member are both disposed in the valve cavity, the elastic member is respectively connected with the sealing head and an inner wall of the valve cavity, the sealing head is used for having a trend of moving in the valve cavity under an elastic force action of the elastic member to seal the air inlet or the air outlet, the sensing portion is connected with the sealing head, and the sensing portion is used for keeping the sealing head in a position-stopping state when an ambient temperature is lower than or equal to a preset temperature, and the air outlet and the air inlet are communicated; or when the sensed environmental temperature is higher than the preset temperature, releasing the sealing head to enable the sealing head to seal the air inlet or the air outlet.

Compared with the prior art, the embodiment of the utility model provides a catch fire mechanism and gas room heater of cutting off gas includes for prior art's beneficial effect:

the valve comprises a valve body, a sealing head and an elastic piece, wherein the valve body is provided with an air inlet, a valve cavity and an air outlet which are sequentially communicated, the air inlet is used for communicating an air source, and the air outlet is used for communicating a combustion mechanism so as to communicate the air source and the combustion mechanism. The sealing head and the elastic piece are arranged in the valve cavity, the elastic piece is connected with the inner wall of the sealing head and the inner wall of the valve cavity respectively, the sealing head can move in the valve cavity under the action of the elastic force of the elastic piece, and the sealing head can move under the action of the elastic force of the elastic piece to seal the air inlet or the air outlet so as to cut off the connection between the combustion mechanism and the air source. The sensing part is connected with the sealing head and used for keeping the sealing head in a stop state when the ambient temperature is lower than or equal to a preset temperature and enabling the air outlet and the air inlet to be communicated; the sensing part can also release the sealing head when the sensed ambient temperature is higher than the preset temperature, so that the sealing head seals the air inlet or the air outlet. In other words, after the sensing portion releases the sealing head, the sealing head will move in the valve cavity under the elastic force of the elastic member to seal the air inlet or the air outlet so as to cut off the connection between the combustion mechanism and the air source. So, when the condition of catching fire does not take place, the position of sealed head is restricted to the response portion, and when the condition of catching fire takes place for the gas room heater, the response portion will be because of its ambient temperature risees and release the sealed head in the valve body, and the elastic component acts on sealed overhead to make sealed head seal air inlet or gas outlet under the effect of elastic component, with the connection of cutting off combustion mechanism and air supply, and then in time cut off the air supply, avoid appearing further accident.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.

Fig. 1 is the embodiment of the utility model provides a structural schematic diagram that mechanism of cutting off gas supply on catching fire is applied to gas warmer.

Fig. 2 is a schematic structural view of the misfire air-break mechanism provided by the embodiment of the present invention.

Fig. 3 is a schematic structural explosion diagram of the misfire air-break mechanism provided by the embodiment of the present invention.

Icon: 100-a gas warmer; 20-a combustion mechanism; 10-fire gas-break mechanism; 12-a valve; 122-a valve body; 1221-air inlet; 1222-a valve cavity; 1223-air outlet; 123-sealing head; 1231-seal ring; 1233-sealing the groove; 1232-a seal; 125-an elastic member; 126-plug; 15-an inductive component; 151-a sensing portion; 152-a sensing frame; 1521-first connection; 1522-second connection; 1523 third connecting part; 153-threaded connections; 155-a flexible wire; 1551-fixing buckle; 156-flexible guide tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "upper", "lower", "inner", "outer", "left", "right", and the like refer to orientations or positional relationships based on those shown in the drawings, or orientations or positional relationships that are conventionally used to place the products of the present invention, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It is also to be understood that, unless expressly stated or limited otherwise, the terms "disposed," "connected," and the like are intended to be open-ended, and mean "connected," i.e., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

Example (b):

referring to fig. 1, fig. 1 is a schematic structural view illustrating a fire stopping mechanism 10 applied to a gas warmer 100 according to an embodiment of the present invention.

The embodiment of the utility model provides a mechanism of cutting off gas 10 catches fire, this mechanism of cutting off gas 10 catches fire have can be under the condition of catching fire automatic in time cut off the characteristics of air supply. The fire gas shutoff mechanism 10 can be applied to scenes where heat is generated by burning gas, such as a gas warmer 100, a gas stove, a gas water heater, and the like.

Wherein, take the application of the gas-off mechanism 10 on the gas warmer 100 for example, the gas warmer 100 comprises the gas-off mechanism 10 on fire and the combustion mechanism 20, the combustion mechanism 20 is connected with the gas source through the gas-off mechanism 10 on fire, so that when the combustion mechanism 20 has the fire condition, the connection between the gas source and the combustion mechanism 20 is automatically and timely cut off, thereby reducing casualties and property loss.

Because gas warmer 100 has adopted the embodiment of the utility model provides a catch fire and cut off gas mechanism 10, so this gas warmer 100 also has the characteristics that can in time cut off the air supply automatically under the state of catching fire.

The structural composition, the operation principle and the advantageous effects of the misfire cutoff mechanism 10 according to the embodiment of the present invention will be described in detail below.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a fire stopping mechanism 10 according to an embodiment of the present invention. Wherein, for the convenience of display, the valve body 122 is partially of a cutting structure. Fig. 3 is an exploded schematic view of the misfire cutoff mechanism 10 according to the embodiment of the present invention.

The fire gas shutoff mechanism 10 comprises a valve 12 and a sensing part 151, wherein the sensing part 151 can sense whether fire occurs in the environment, and timely close the valve 12 to cut off the connection between the combustion mechanism 20 and a gas source when fire occurs.

The valve 12 includes a valve body 122, a sealing head 123 and an elastic member 125, and the valve body 122 has a gas inlet 1221, a valve cavity 1222 and a gas outlet 1223 sequentially connected to each other, in other words, the valve cavity 1222 is disposed in the valve body 122, the gas inlet 1221 and the gas outlet 1223 communicating the valve cavity 1222 and the external space are further disposed, the gas inlet 1221 is used for communicating a gas source, and the gas outlet 1223 is used for communicating the combustion mechanism 20 to communicate the gas source and the combustion mechanism 20.

The sealing head 123 and the elastic member 125 are disposed in the valve cavity 1222, the elastic member 125 is connected to the sealing head 123 and the inner wall of the valve cavity 1222, the sealing head 123 tends to move in the valve cavity 1222 under the elastic force of the elastic member 125, and the sealing head 123 seals the air inlet 1221 or the air outlet 1223 under the elastic force of the elastic member 125, so as to cut off the connection between the combustion mechanism 20 and the air source.

The sensing part 151 is connected with the sealing head 123, and the sensing part 151 is used for keeping the sealing head 123 in a stop state and keeping the air outlet 1223 and the air inlet 1221 communicated when the ambient temperature is lower than or equal to a preset temperature; the sensing part 151 is also capable of releasing the sealing head 123 when the sensed ambient temperature is higher than a preset temperature, so that the sealing head 123 seals the air inlet 1221 or the air outlet 1223. In other words, after the sensing portion 151 releases the sealing head 123, the sealing head 123 will move in the valve cavity 1222 under the elastic force of the elastic member 125 to seal the air inlet 1221 or the air outlet 1223 to cut off the connection between the combustion mechanism 20 and the air source.

Thus, when a fire accident occurs, the sensing part 151 limits the position of the sealing head 123, and when the fire accident occurs in the gas warmer 100, the sensing part 151 releases the sealing head 123 inside the valve body 122 due to the rise of the ambient temperature, and the elastic member 125 acts on the sealing head 123, so that the sealing head 123 seals the air inlet 1221 or the air outlet 1223 under the action of the elastic member 125, thereby cutting off the connection between the combustion mechanism 20 and the air source, and further cutting off the air source in time, thereby avoiding further accidents.

It should be noted that, in this embodiment, the sensing part 151 is a combustible string, the combustible string is connected to the sealing head 123, and the combustible string is configured to be disconnected when the temperature of the combustible string is higher than a preset temperature, so as to release the sealing head 123. This easily fire rope can be rope or the part that rope made of hemp plastics rope etc. can break off when burning, and also can constitute for temperature-sensing switch and fixture in other response portions 151, and when temperature-sensing switch sensed the temperature and was higher than preset the temperature, fixture received temperature-sensing switch's signal to release sealing head 123.

Further, this mechanism 10 of cutting off gas on catching fire can include response subassembly 15, and response portion 151 belongs to response subassembly 15, and response subassembly 15 still can include response frame 152, and the one end and the valve body 122 of this response frame 152 are connected, and the other end is connected with easily firing the rope, and easily fires the middle part of rope and have the clearance with response frame 152 to it is unsettled fixed to easily fire the rope, makes when catching fire, easily in time breaks off easily firing the rope, in time releases sealing head 123.

Further, the sensing assembly 15 may further include a screw thread connector 153, the screw thread connector 153 is screw-coupled to the sensing frame 152, the screw thread connector 153 is capable of rotating with respect to the sensing frame 152, the inflammable rope is coupled to the sensing frame 152 through the screw thread connector 153, and the screw thread connector 153 is disposed along an extending direction of the inflammable rope. Thus, the tautness of the combustible cord can be adjusted by rotating the threaded connector 153 so that the combustible cord can be disconnected in time when a fire is occurring.

Further, the sensing assembly 15 further includes a flexible wire 155 and a flexible guiding tube 156, two ends of the flexible guiding tube 156 are respectively connected to the valve body 122 and the sensing frame 152 to connect the sensing frame 152 and the valve body 122, the flexible wire 155 is movably disposed in the flexible guiding tube 156, and two ends of the flexible wire 155 are respectively connected to the sealing head 123 and the combustible rope to connect the combustible rope and the sealing head 123, and thus, the flexible wire 155 and the flexible guiding tube 156 are connected to make the sensing frame 152 flexible and unknown, in particular, to make the sensing frame 152 more close to the combustion mechanism 20, thereby further shortening the speed of breaking the combustible rope in case of fire.

It should be noted that the flexible wire 155 and the flexible guiding tube 156 may be, for example, a steel wire and a metal sleeve of a bicycle brake cable, and a fixing buckle 1551 may be further disposed at an end of the flexible wire 155, and the flexible wire 155 is connected to the sensing part 151 through the fixing buckle 1551 so as to be connected to the sensing part 151.

Further, the induction frame 152 may include a first connection portion 1521, a second connection portion 1522 and a third connection portion 1523, which are connected in sequence, and the first connection portion 1521, the second connection portion 1522 and the third connection portion 1523 are disposed in a shape of Chinese character 'ji', the inflammable rope is located between the first connection portion 1521 and the second connection portion 1522, and the inflammable rope is connected to the third connection portion 1523, and a gap is formed between the inflammable rope and the third connection portion 1523, so that the inflammable rope can be burned off in time, and the valve body 122 is connected to the valve body 122, and in this embodiment, the valve body 122 is connected to the first connection portion 1521 through a flexible guide.

In this embodiment, the sensing frame 152 is a first connection portion 1521, a second connection portion 1522 and a third connection portion 1523 formed by bending a metal plate.

Further, an end of the flexible wire 155 remote from the sensing frame 152 is rotatably connected to the sealing head 123, so that the sealing head 123 can rotate relative to the flexible wire 155 when the valve body 122 is assembled, thereby facilitating the assembly and flexible configuration of the flexible tube.

With continued reference to fig. 2 and 3, the elastic member 125 is elastically deformed and compressed between the sealing head 123 and the inner wall of the valve cavity 1222 to push the sealing head 123 to move in the valve cavity 1222 to close the air inlet 1221 or the air outlet 1223 when the combustible string is broken.

It should be noted that, in this embodiment, the valve cavity 1222 is disposed in a column shape, the air outlet 1223 is disposed at a side surface of the column-shaped space, the air inlet 1221 is disposed at one end of the column-shaped space, the sealing head 123 and the elastic member 125 are disposed at the other end of the column-shaped space, and the sealing head 123 includes a sealing ring 1231 and a sealing portion 1232, wherein the sealing portion 1232 is connected to the sensing portion 151, and a sealing groove 1233 is further annularly disposed on the sealing portion 1232, the sealing ring 1231 is sleeved on the sealing groove 1233, the sealing portion 1232 is disposed coaxially with the valve cavity 1222, and the sealing ring 1231 abuts against an inner wall of the valve cavity 1222, and the sealing head 123 can move toward the air inlet 1221 under an elastic force of the elastic member 125, and pass over the air outlet 1223 to close the air inlet 1221, thereby cutting off communication. The structure is simple, and the cost is low.

In this embodiment, the elastic member 125 is a coil spring elastically deformable and compressed between the sealing head 123 and the inner wall of the valve cavity 1222, in other embodiments, the elastic member 125 may be a rubber member, and the valve 12 may further include a plug 126, the plug 126 seals the opening of the valve cavity 1222, and the flexible wire 155 is inserted through the plug 126 to extend into the valve cavity 1222.

The embodiment of the utility model provides a fire air-break mechanism 10's theory of operation is:

in normal use, the combustible string is connected to the threaded connection 153 on the sensing frame 152 at one end and to the flexible wire 155 in the flexible guide tube 156 at the other end to connect the sealing head 123 through the flexible wire 155, so as to limit the movement of the sealing head 123 toward the air inlet 1221 under the elastic force of the elastic member 125 and keep still in the valve chamber 1222.

And when catching fire, the ambient temperature of easily firing the rope will be higher than preset temperature, easily fires the rope and will break off when its ambient temperature is higher than preset temperature to release flexible line 155, and then release sealing head 123, sealing head 123 moves towards air inlet 1221 under the effect of the elastic force of elastic component 125, with closed air inlet 1221, and then closes air inlet 1221, cuts off the connection between gas mechanism and the air supply, avoids the intensity of a fire to further enlarge.

In summary, the following steps:

the embodiment of the utility model provides a mechanism of cutting off gas 10 catches fire, it has the characteristics that can in time cut off the air supply automatically under the state of catching fire.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that the features in the above embodiments may be combined with each other without conflict, and various modifications and variations of the present invention are possible. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The present embodiments are to be considered as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. The fire stopping mechanism is characterized by comprising a valve and an induction part;

the valve comprises a valve body, a sealing head and an elastic piece, wherein the valve body is provided with a gas inlet, a valve cavity and a gas outlet which are sequentially communicated, the gas inlet is used for communicating a gas source, and the gas outlet is used for communicating a combustion mechanism;

the sealing head and the elastic piece are arranged in the valve cavity, the elastic piece is respectively connected with the sealing head and the inner wall of the valve cavity, and the sealing head is used for having a trend of moving in the valve cavity under the action of elastic force of the elastic piece so as to seal the air inlet or the air outlet;

the sensing part is connected with the sealing head and used for keeping the sealing head in a stop state when the ambient temperature is lower than or equal to a preset temperature, and the air outlet is communicated with the air inlet; or when the sensed environmental temperature is higher than the preset temperature, releasing the sealing head to enable the sealing head to seal the air inlet or the air outlet.

2. The fire disconnect mechanism of claim 1, wherein the sensing portion is a combustible cord connected to the sealing head, and the combustible cord is configured to break when a temperature thereof is above the preset temperature to release the sealing head.

3. The misfire cutoff mechanism as recited in claim 1 wherein the misfire cutoff mechanism comprises a sensing assembly comprising the sensing portion and further comprising a sensing bracket;

one end of the induction frame is connected with the valve body, the other end of the induction frame is connected with the induction part, and a gap is reserved between the middle part of the induction part and the induction frame.

4. The misfire cutoff mechanism as recited in claim 3 wherein the sensing assembly further comprises a threaded connector rotatably threaded to the sensing bracket;

the induction part passes through threaded connection spare with the response frame is connected, just threaded connection spare follows the extending direction setting of induction part.

5. The fire air-break mechanism according to claim 3, wherein the sensing frame comprises a first connecting portion, a second connecting portion and a third connecting portion which are connected in sequence, and the first connecting portion, the second connecting portion and the third connecting portion are arranged in a font shape;

the valve body is connected with the first connecting portion, the sensing portion is connected with the third connecting portion and located between the first connecting portion and the second connecting portion, and a gap is formed between the sensing portion and the third connecting portion.

6. The misfire cutoff mechanism as recited in claim 3 wherein the sensing assembly further comprises a flexible wire and a flexible guide tube, both ends of the flexible guide tube being connected to the valve body and the sensing bracket, respectively, to connect the sensing bracket and the valve body;

the flexible wire is movably arranged in the flexible guide pipe, and two ends of the flexible wire are respectively connected with the sealing head and the sensing part to be connected with the sensing part and the sealing head.

7. The misfire cutoff mechanism as recited in claim 6 wherein an end of the flexible wire distal from the induction frame is rotatably coupled to the sealing head.

8. The misfire cutoff mechanism as recited in claim 1 wherein the resilient member is elastically deformably compressed between the seal head and an inner wall of the valve chamber.

9. The misfire gas shutoff mechanism as recited in claim 1 wherein the valve cavity is a cylindrical space, the gas outlet is disposed at a side of the cylindrical space, the gas inlet is disposed at one end of the cylindrical space, and the sealing head and the elastic member are both disposed at the other end of the cylindrical space;

the sealing head comprises a sealing ring and a sealing part, the sealing part is connected with the sensing part, a sealing groove is annularly arranged on the sealing part, the sealing ring is sleeved on the sealing groove, the sealing part is coaxially arranged with the valve cavity, the sealing ring is abutted to the inner wall of the valve cavity, and the sealing head can move towards the air inlet under the action of elastic force of the elastic piece and cross over the air outlet to seal the air inlet.

10. A gas warmer, comprising a combustion means and a misfire cutoff means as claimed in any one of claims 1 to 9, said combustion means being connected to said air outlet.

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