CN216279547U

CN216279547U - Gas valve

Info

Publication number: CN216279547U
Application number: CN202122901236.0U
Authority: CN
Inventors: 金根喜
Original assignee: Taizhou Meiyadi Fluid Intelligent Control Co ltd
Current assignee: Zhejiang Meiyadi Fluid Intelligent Control Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-04-12
Anticipated expiration: 2031-11-24

Abstract

The utility model provides a gas valve, and belongs to the technical field of gas accessories. It has solved the current not good scheduling problem of gas valve suitability. The gas valve comprises a valve body, a valve core is arranged in a valve cavity, the valve core is spherical, the outer end of the valve core is connected with a valve rod part, the inner end of the valve core is provided with a vent hole, the middle part of the valve core is radially provided with a first gas hole and a second gas hole, the aperture of the first gas hole is larger than that of the second gas hole, and an included angle between the first gas hole and the second gas hole is 90-120 degrees, the valve cavity between the right side of the valve core and the valve body is a vent cavity, a big fire vent channel is arranged in the valve body, a small fire vent channel is arranged in the valve body, the aperture of the big fire vent channel is larger than that of the small fire vent channel, the top of the valve body is provided with a long open fire air outlet end, and the valve body is internally provided with a long open fire air vent channel communicated with the long open fire air outlet end and the vent cavity. The utility model has the advantages of compact structure, good applicability, long service life and the like.

Description

Gas valve

Technical Field

The utility model belongs to the technical field of gas accessories, and particularly relates to a gas valve.

Background

The existing gas cookers (such as household gas cookers, commercial gas cookers, outdoor gas cookers, industrial gas cookers and the like) control the gas flow through a plug valve so as to adjust the fire intensity. The existing plug valve comprises a valve body, the valve body is provided with a valve cavity, a rotating plug is arranged in the valve cavity, a main shaft is pivoted on the valve body, a knob is connected on the main shaft, the main shaft and the plug are driven to rotate through the knob, and a gas passing channel arranged on the plug enables a gas inlet and a gas outlet of the valve cavity to be communicated, so that gas is supplied to a gas appliance.

In order to increase the safety and prevent the gas leakage of the gas appliance after flameout, the gas appliance is provided with a flameout protection device, and at present, two types of flameout protection devices are provided, one type is a thermocouple type flameout protection device, and the other type is an ion induction type flameout protection device. Because the thermocouple type flameout protection device is more suitable for being applied to open environment combustion, the thermocouple type flameout protection device is generally selected for the existing gas appliances. The thermocouple type flameout protection device comprises a thermocouple and an electromagnetic valve, the thermocouple is installed at the furnace end, one end of the thermocouple is close to the combustion position of the furnace end, the electromagnetic valve is installed on a valve body of the plug valve, a valve rod of the electromagnetic valve is provided with a plug, and the thermocouple is electrically connected with the electromagnetic valve. When the furnace end normally burns, thermocouple one end is heated, produces the thermoelectric voltage, and the thermoelectric voltage is the solenoid valve power supply, and the solenoid valve adsorbs the valve rod, and the jam is mentioned, and the air inlet and the gas outlet intercommunication of valve body, after the flame accident of furnace end is extinguished, the thermoelectric voltage disappears, and the solenoid valve outage, the valve rod resets under the effect of the inside spring of solenoid valve, and the jam is ejecting with shutoff gas passageway to cut off the air feed.

The existing gas plug valve is manufactured by an external (Italy and Germany) processing process, the process is complex, the domestic manufacture has larger limitation and high manufacturing cost, particularly, the processing of the conical surface of the outer wall of the valve core and the inner conical surface of the valve body has extremely high requirements on a processing machine tool, the rejection rate is high, the plug valve is only suitable for a low-pressure gas environment and cannot meet the use requirements of high-medium-pressure gas, the application range is small, the durability test of the plug valve is limited to 10-ten-thousand times of switching, the service life is not long enough, when the aperture of a valve core air outlet hole is required to be equal to 12mm or a larger flow is required, the aperture and the outer diameter of the valve body of the plug valve need to be increased, the outer diameter of the valve core is also increased, the friction force of the conical surface is too large, the torsion of the plug valve is too large to be in a torsion value specified by national standards, the plug valve cannot be used, and in addition, long open fire is required to be externally connected, The large and small fire pipelines are connected with regulating valves on the ever-burning fire pipelines and the large and small fire pipelines, so that the structure is not compact, the size is large, and the installation and the arrangement are inconvenient.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provide a gas valve which is compact in structure, good in applicability and long in service life.

The purpose of the utility model can be realized by the following technical scheme: a gas valve comprises a valve body, wherein a valve cavity is arranged in the valve body, the valve body is provided with a gas inlet end and a big and small fire gas outlet end which are communicated with the valve cavity, a valve core is arranged in the valve cavity, the gas valve is characterized in that the valve core is spherical, the outer end of the valve core is connected with a valve rod part, the inner end of the valve core is provided with a vent hole which is axially recessed and communicated with the gas inlet end, a sealing ring for sealing the outer end and the inner end of the valve core is arranged in the valve body, the middle part of the valve core is radially provided with a first gas hole and a second gas hole which are communicated with the vent hole, the aperture of the first gas hole is larger than that of the second gas hole, the included angle between the first gas hole and the second gas hole is 90-120 degrees, the valve cavity between the left side of the valve core and the valve body is a left side sealing cavity, the valve cavity between the bottom of the valve core and the valve body is a bottom sealing cavity, and the valve cavity between the right side of the valve core and the valve body is a vent cavity, the big and small fire air outlet ends are positioned at the top of the valve body, a big fire air duct communicated with the top of the valve core and the big and small fire air outlet ends is arranged in the valve body, the valve body is internally provided with a small fire vent channel communicated with the big fire outlet end and the small fire outlet end and the vent cavity, the aperture of the big fire vent channel is larger than that of the small fire vent channel, the top of the valve body is provided with an ever-burning open fire outlet end, and the valve body is internally provided with an ever-burning open fire vent channel communicated with the ever-burning open fire outlet end and the vent cavity, when the gas valve is in a closed position, the first gas hole is sealed by the bottom sealing cavity and the second gas hole is sealed by the left sealing cavity, when the gas valve is in the state of supplying gas by long-time open fire and small fire, the first gas hole is communicated with the ventilation cavity and the second gas hole is sealed by the bottom sealing cavity, when the gas valve is used for supplying gas on small fire, large fire and ever-burning fire, the first gas hole is communicated with the large fire air passage and the second gas hole is communicated with the air cavity.

In the above gas valve, the valve core is radially provided with a third gas hole communicated with the vent hole, the third gas hole is arranged close to the first gas hole, the first gas hole is positioned between the third gas hole and the second gas hole, the aperture of the third gas hole is smaller than that of the first gas hole, and when the gas valve is in the closed position, the third gas hole is sealed by the bottom sealing cavity.

In the above-mentioned gas valve, the valve rod portion and the valve core are of an integral structure, the valve rod portion extends out of the valve body, one sealing ring is embedded in the outer wall of the valve rod portion close to the outer end of the valve core and is sealed on the inner wall of the valve body, the inner end of the valve core is provided with a cylindrical portion extending axially, and the other sealing ring is embedded in the outer wall of the cylindrical portion and is sealed on the inner wall of the valve body.

In the gas valve, the valve body is connected with a big fire adjusting screw which radially penetrates through the big fire vent channel through a bolt, an O-shaped ring I sealed on the valve body is embedded at the head of the big fire adjusting screw, and the inner end of the big fire adjusting screw is close to the inner end of the big fire outlet end and the small fire outlet end.

In foretell gas valve, the small fire air vent include small fire air vent one, small fire air vent two and small fire air vent three, small fire air vent one link up to the chamber of ventilating and the valve body top from the valve body top and link firmly the shutoff piece with the shutoff of a small fire air vent outer end shutoff, small fire air vent two be located the valve body and communicate in small fire air vent one, the inner and the small fire air vent two of small fire air vent three communicate, the outer end of small fire air vent three communicates in big fire end of giving vent to anger, valve body threaded connection have a small fire adjusting screw, the head of small fire adjusting screw inlays and is equipped with the O two of sealing in the valve body, the inner of small fire adjusting screw is located the interior end department of small fire air vent three.

In the above-mentioned gas valve, the ever-burning open fire air duct include ever-burning open fire air vent one and ever-burning open fire air vent two, ever-burning open fire air vent one link up to the ventilation chamber and valve body top and link firmly the shutoff piece with the shutoff of ever-burning open fire air vent one outer end shutoff from the valve body top, ever-burning open fire air vent two the inner and ever-burning open fire air vent one intercommunication, ever-burning open fire air vent two the outer end communicate in ever-burning open fire end of giving vent to anger, valve body threaded connection have ever-burning open fire adjusting screw, ever-burning open fire adjusting screw's head inlay be equipped with sealed in the valve body O type circle three, ever-burning open fire adjusting screw's the inner is located ever-burning open fire air vent two the inner department.

In the above gas valve, the big fire adjusting screw, the small fire adjusting screw and the long open fire adjusting screw are arranged in parallel, and the heads of the big fire adjusting screw, the small fire adjusting screw and the long open fire adjusting screw face the end part of the valve body where the valve rod part is arranged in a penetrating way.

In the above-mentioned gas valve, the valve body be equipped with the solenoid valve in the axial extending direction of case inner, the solenoid valve have to the valve rod that the case side stretches out, the tip of valve rod be the shutoff portion of radial evagination, the cover is equipped with spring one on the valve rod, the inner wall of valve body has the fender shoulder that is located between case and the shutoff portion, keep off the shoulder center for crossing the gas pocket, the inlet end communicate in the cavity of valve body power supply solenoid valve installation, spring one provide elasticity and make the shutoff portion will cross the gas pocket shutoff, the inner that a push rod axial passed valve stem portion and push rod is located the case, valve stem portion on be equipped with and drive the push rod when valve stem portion rotates and push up the drive mechanism that touches the shutoff portion and provide the restoring force for the push rod.

In foretell gas valve, drive mechanism include that the cover is equipped with drive disk and spring two on the valve stem portion, spring two be located between drive disk and the valve body, the outer wall of drive disk have and be used for the spacing lug of circumference or recess, the push rod link firmly with drive disk mutually, the valve stem portion on radially wear to be equipped with the gag lever post, the drive disk the terminal surface of gag lever post have mirror symmetry's spacing groove, one side cell wall of spacing groove is for supplying the gliding inclined plane of gag lever post, spring two provide elasticity and make the spacing groove be located the spacing groove.

In the above gas valve, the left side of the valve body is in threaded connection with the first plug, the first plug is embedded with a left side sealing ring sealed on the left side of the valve core, the bottom of the valve body is in threaded connection with the second plug, the second plug is embedded with a bottom sealing ring sealed on the bottom of the valve core, the inner end of the big fire air duct is in threaded connection with a hollow plugging cap, the plugging cap is embedded with a top sealing ring sealed on the top of the valve core, and the outer end of the big fire air duct is in threaded connection with a valve cover. The valve body is provided with a left sealing cavity and a bottom sealing cavity, the left sealing cavity and the bottom sealing cavity are convenient to manufacture, the valve core is convenient to assemble, the sealing performance at each position is good, the valve core rotates smoothly, and the first plug and the second plug are embedded with sealing rings sealed in the valve body for good sealing performance.

Compared with the prior art, the gas valve has compact integral structure, good integration, small volume, convenient installation and arrangement, convenient processing of the spherical valve core and low manufacturing cost, the spherical valve core ensures that the gas valve is not only suitable for low-pressure gas environment, but also suitable for medium-high pressure gas environment, has good applicability, can adjust long naked flame and big and small flame, saves energy and reduces consumption, is convenient to use, has long service life, can ensure that the size of the valve core is increased without causing the torque to be linearly and rapidly increased when the ventilation aperture of the valve core is equal to 12mm or a larger flow is required, ensures that the torque of the valve core is still within the torque value specified by national standards, has wide application range, can be adapted to general mechano-electronic piezoelectric ignition or pulse ignition driven by a microswitch and also is adapted to the existing knob press switch or linear knob switch, the adaptability is good.

Drawings

Fig. 1 is a perspective view of the gas valve.

Fig. 2 is a structural sectional view of the gas valve.

Fig. 3 is a structural plan view of the gas valve.

Fig. 4 is a structural sectional view of the section a-a in fig. 3.

Fig. 5 is a structural sectional view of the gas valve, which is longitudinally cut along an axis of the ever-burning fire vent hole.

Fig. 6 is a structural section view of the gas valve, which is transversely cut along the two axes of the long open fire vent hole.

Fig. 7 is a perspective view of the valve core of the gas valve.

Fig. 8 is a sectional view of the gas valve closed.

Fig. 9 is a structural sectional view of the gas valve in the case of supplying gas for a long open fire and a small fire.

Fig. 10 is a sectional view showing the structure of the gas valve when gas is supplied to a small fire, a large fire, and a long open fire.

In the figure, 1, a valve body; 2. an air inlet end; 3. the big and small fire outlet ends; 4. a valve core; 5. a valve stem portion; 6. a vent hole; 7. a seal ring; 8. a first gas hole; 9. a second fuel gas hole; 10. a vent lumen; 11. a strong fire air duct; 12. a small fire air duct; 121. a small fire vent hole I; 122. a small fire vent hole II; 123. a small fire vent hole III; 13. the ever-burning fire air outlet end; 14. an ever-open fire air duct; 141. a first vent hole for ever-burning fire; 142. a second vent hole for ever-burning fire; 15. a third gas hole; 16. a cylindrical portion; 17. a big fire adjusting screw; 18. a first O-shaped ring; 19. a small fire adjusting screw; 20. an O-shaped ring II; 21. adjusting screws for ever-burning fire; 22. an O-shaped ring III; 23. an electromagnetic valve; 231. a valve stem; 232. a plugging section; 24. a first spring; 25. a shoulder block; 26. air passing holes; 27. a push rod; 28. driving the disc; 281. a bump; 29. a second spring; 30. a limiting rod; 31. a limiting groove; 311. an inclined surface; 32. a first plug; 33. a left side seal ring; 34. a second plug; 35. a bottom seal ring; 36. a plugging cap; 37. a top seal ring; 38. and a valve cover.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 4, 5 and 6, the gas valve comprises a valve body 1, a valve cavity is arranged in the valve body 1, the valve body 1 is provided with a gas inlet end 2 and a gas outlet end 3 for big and small fire which are both communicated with the valve cavity, a valve core 4 is arranged in the valve cavity, the valve core 4 is spherical, the outer end of the valve core 4 is connected with a valve rod part 5, the inner end of the valve core 4 is provided with a vent hole 6 which is axially recessed and communicated with the gas inlet end 2, a sealing ring 7 for sealing the outer end and the inner end of the valve core 4 is arranged in the valve body 1, the middle part of the valve core 4 is radially provided with a first gas hole 8 and a second gas hole 9 which are communicated with the vent hole 6, the aperture of the first gas hole 8 is larger than that of the second gas hole 9, the included angle between the first gas hole 8 and the second gas hole 9 is 90-120 degrees, the valve cavity between the left side of the valve core 4 and the valve body 1 is a left side sealing cavity, the valve cavity between the bottom of the valve core 4 and the valve body 1 is a bottom sealing cavity, the valve cavity between the right side of the valve element 4 and the valve body 1 is a ventilation cavity 10, in the embodiment, the left side of the valve body 1 is in threaded connection with a first plug 32, the first plug 32 is embedded with a left side sealing ring 33 sealed on the left side of the valve element 4, the bottom of the valve body 1 is in threaded connection with a second plug 34, the second plug 34 is embedded with a bottom sealing ring 35 sealed on the bottom of the valve element 4, the inner end of the big fire ventilation channel 11 is in threaded connection with a hollow plugging cap 36, the plugging cap 36 is embedded with a top sealing ring 37 sealed on the top of the valve element 4, and the outer end of the big fire ventilation channel 11 is in threaded connection with a valve cover 38. The big fire outlet end 3 and the small fire outlet end 3 are positioned at the top of the valve body 1, the valve body 1 is internally provided with a big fire air duct 11 which is communicated with the top of the valve core 4 and the big fire outlet end 3, the valve body 1 is internally provided with a small fire air duct 12 which is communicated with the big fire outlet end 3 and the small fire outlet end 3 and the air cavity 10, the aperture of the big fire air duct 11 is larger than that of the small fire air duct 12, the top of the valve body 1 is provided with a long open fire outlet end 13, the valve body 1 is internally provided with a long open fire air duct 14 which is communicated with the long open fire outlet end 13 and the air cavity 10, when the gas valve is in the closed position, the first gas hole 8 is sealed by the bottom sealing cavity and the second gas hole 9 is sealed by the left sealing cavity, when the gas valve is in the state of supplying gas by long open fire and small fire, the first gas hole 8 is communicated with the ventilation cavity 10 and the second gas hole 9 is sealed by the bottom sealing cavity, when the gas valve is used for supplying gas on big fire and long open fire, the first gas hole 8 is communicated with the big fire vent passage 11 and the second gas hole 9 is communicated with the vent cavity 10.

The valve core 4 in the gas valve plays a role in blocking, the big fire vent channel 11 is not communicated with the vent cavity 10, the included angle between the first gas hole 8 and the second gas hole 9 is 100 degrees in the embodiment, and the included angle between the first gas hole 8 and the second gas hole 9 can be selected from 90-120 degrees according to actual manufacturing requirements; this gas valve passes through the rotation of valve stem portion 5, drive case 4 and rotate, thereby change the radial position of first gas hole 8 and second gas hole 9, realize the intensity of a fire regulation of ever-burning fire, big or small fire, compact structure, the integrated nature is good, small, be convenient for install and arrange, and it is convenient to be processed to be globular case 4, low in manufacturing cost, it not only is applicable to the low pressure gas environment to be globular case 4, still be applicable to medium-high pressure gas environment, high applicability, the durability test of this gas valve, the limit is 30 ten thousand switches, long service life, when needing case 4 department air vent 6 footpaths equal 12mm or need ask more big flow, the increase of case 4 size, can not make the moment of torsion be linear quick increase in size, case 4's torsion still is in the torsion value of national standard regulation, and wide application scope.

In the use process of the gas valve, as shown in fig. 8, when the gas valve is in a closed position, the first gas hole 8 is sealed by the bottom sealing cavity and the second gas hole 9 is sealed by the left sealing cavity, gas enters from the gas inlet end 2 and flows to the vent hole 6, the valve core 4 plays a role in blocking, and the gas outlet end 13 of long open fire and the gas outlet ends 3 of large fire and small fire cannot supply gas; as shown in fig. 9, the valve rod portion 5 drives the valve core 4 to rotate counterclockwise, when the gas valve is in the state of supplying gas by long open fire and small fire, the first gas hole 8 is communicated with the ventilation cavity 10 and the second gas hole 9 is sealed by the bottom sealing cavity, the gas at the gas inlet end 2 flows through the ventilation hole 6 and flows from the first gas hole 8 to the ventilation cavity 10, then the gas enters the small fire ventilation channel 12 and the long open fire ventilation channel 14, the gas in the small fire ventilation channel 12 flows out from the large fire outlet end 3 and the small fire outlet end 3 for use by the small fire, and the gas in the long open fire ventilation channel 14 flows out from the long open fire outlet end 13 for use by the long open fire; the valve rod part 5 continues to drive the valve core 4 to rotate anticlockwise, the first gas hole 8 plays a transition role due to the fact that the aperture of the first gas hole 8 is large, the first gas hole 8 is communicated with the ventilation cavity 10 and the big fire ventilation channel 11 at the same time, and when the second gas hole 9 is not communicated with the ventilation cavity 10, the first gas hole 8 is communicated with the ventilation cavity 10 all the time, and long open fire is guaranteed; as shown in fig. 10, when the gas valve is used for supplying gas for a big fire and a long open fire, the first gas hole 8 is communicated with the big fire air duct 11 and the second gas hole 9 is communicated with the air cavity 10, the gas entering from the gas inlet end 2 enters the first gas hole 8 from the air vent 6 and then flows out from the big fire air duct 11 to the big fire air outlet end 3 for the big fire, the gas flowing out from the second gas hole 9 enters the small fire air duct 12 and the long open fire air duct 14 from the air cavity 10, the gas flowing out from the small fire air duct 12 flows out from the big fire air outlet end 3 for the small fire, and the gas flowing out from the long open fire air outlet end 13 of the long open fire air duct 14 for the long open fire.

Further saying in detail, the third gas hole 15 that communicates in air vent 6 is radially seted up to case 4, and first gas hole 8 setting and first gas hole 8 are located between third gas hole 15 and the second gas hole 9 are pressed close to third gas hole 15, and the aperture of third gas hole 15 is less than the aperture of first gas hole 8, and when the gas valve was in closed position, third gas hole 15 was sealed by the bottom seal chamber. In the use process, the valve core 4 rotates to enable the third gas hole 15 to be communicated with the ventilation cavity 10 firstly, so that the gas stroke is shortened, the third gas hole 15 supplies gas to enable the long-time open fire and the small fire to be rapidly combusted, and the efficiency is improved; continue to rotate case 4, make third gas hole 15 rotate ventilation cavity 10, third gas hole 15 communicates in big fire air vent 11, has improved big fire combustion efficiency, and the intensity of a fire of big fire is along with third gas hole 15, first gas hole 8 communicate gradually in big fire air vent 11 and crescent in big fire air vent, and the accommodation range of big fire intensity is big like this, and convenient to use person selects suitable flame size, convenient to use. For smooth ventilation and improved adjustment accuracy, the outer end orifice of the third gas hole 15 is flared.

As shown in fig. 7, the valve stem portion 5 and the valve core 4 are of an integral structure, the valve stem portion 5 extends out of the valve body 1, one sealing ring 7 is embedded in the outer wall of the valve stem portion 5 close to the outer end of the valve core 4 and is sealed on the inner wall of the valve body 1, the inner end of the valve core 4 is provided with a cylindrical portion 16 extending axially, and the other sealing ring 7 is embedded in the outer wall of the cylindrical portion 16 and is sealed on the inner wall of the valve body 1. The structure is compact, the manufacture is convenient, the valve rod part 5, the valve core 4 and the two sealing rings 7 form an assembly, the assembly is convenient, and the valve rod part 5 extends out of the valve body 1 so as to be connected with a knob switch.

The valve body 1 is connected with a big fire adjusting screw 17 which radially penetrates through the big fire air duct 11 through a bolt, an O-shaped ring 18 sealed in the valve body 1 is embedded at the head of the big fire adjusting screw 17, and the inner end of the big fire adjusting screw 17 is close to the inner end of the big fire air outlet end 3. By rotating the big fire adjusting screw 17, the big fire adjusting screw 17 is axially displaced, so that the distance between the inner end of the big fire adjusting screw 17 and the inner end of the big fire air outlet end 3 is changed, the purpose of adjusting the gas flow of the big fire air channel 11 entering the big fire air outlet end 3 is achieved, the structure is compact, and the adjustment is convenient.

The small fire vent 12 comprises a small fire vent I121, a small fire vent II 122 and a small fire vent III 123, the small fire vent I121 penetrates through the vent cavity 10 from the top of the valve body 1, the top of the valve body 1 is fixedly connected with a plugging piece for plugging the outer end of the small fire vent I121, the small fire vent II 122 is located in the valve body 1 and communicated with the small fire vent I121, the inner end of the small fire vent III 123 is communicated with the small fire vent II 122, the outer end of the small fire vent III 123 is communicated with the big fire outlet end 3 and the small fire outlet end 3, the valve body 1 is in threaded connection with a small fire adjusting screw 19, the head of the small fire adjusting screw 19 is embedded with an O-shaped ring II 20 sealed in the valve body 1, and the inner end of the small fire adjusting screw 19 is located at the inner end of the small fire vent III 123. Through rotating small fire adjusting screw 19 for small fire adjusting screw 19 axial displacement, thereby change the opening size of the inner end shutoff in small fire air vent three 123 of small fire adjusting screw 19, reach the purpose of adjusting the gas flow size that small fire air duct 12 got into big fire end 3 of giving vent to anger, compact structure, it is convenient to adjust.

The ever-open-flame vent passage 14 comprises an ever-open-flame vent hole I141 and an ever-open-flame vent hole II 142, the ever-open-flame vent hole I141 penetrates from the top of the valve body 1 to the vent cavity 10, the top of the valve body 1 is fixedly connected with a blocking piece for blocking the outer end of the ever-open-flame vent hole I141, the inner end of the ever-open-flame vent hole II 142 is communicated with the ever-open-flame vent hole I141, the outer end of the ever-open-flame vent hole II 142 is communicated with the ever-open-flame outlet end 13, the valve body 1 is in threaded connection with an ever-open-flame adjusting screw 21, an O-shaped ring III 22 sealed on the valve body 1 is embedded in the head of the ever-open-flame adjusting screw 21, and the inner end of the ever-open-flame adjusting screw 21 is located at the inner end of the ever-open-flame vent hole II 142. The long open fire adjusting screw 21 is rotated to enable the long open fire adjusting screw 21 to axially displace, so that the opening size of the inner end of the long open fire adjusting screw 21, which is blocked in the long open fire vent hole I141, is changed, the purpose of adjusting the gas flow of the long open fire vent channel 14 entering the long open fire outlet end 13 is achieved, the structure is compact, and the adjustment is convenient. The plugging piece is a steel ball in the embodiment, and the plugging piece can be a plug during actual manufacturing.

Big fire adjusting screw 17, little fire adjusting screw 19 and long open fire adjusting screw 21 parallel arrangement and the tip that valve body 1 supplied valve rod portion 5 to wear to establish are all towards the head of three in this embodiment, and big fire adjusting screw 17, little fire adjusting screw 19 and the long open fire adjusting screw 21 that the homonymy set up are convenient for observe, and it is convenient to adjust.

The valve body 1 is provided with an electromagnetic valve 23 in the axial extension direction of the inner end of the valve core 4, the electromagnetic valve 23 is provided with a valve rod 231 extending towards the valve core 4 side, the end part of the valve rod 231 is a radially outward-protruding blocking part 232, a spring 24 is sleeved on the valve rod 231, the inner wall of the valve body 1 is provided with a blocking shoulder 25 positioned between the valve core 4 and the blocking part 232, the center of the blocking shoulder 25 is a gas passing hole 26, the air inlet end 2 is communicated with a chamber for installing the electromagnetic valve 23 in the valve body 1, the spring 24 provides elastic force to enable the blocking part 232 to block the gas passing hole 26, a push rod 27 axially penetrates through the valve rod part 5, the inner end of the push rod 27 is positioned in the valve core 4, and the valve rod part 5 is provided with a driving mechanism for driving the push rod 27 to abut against the blocking part 232 and providing reset force for the push rod 27 when the valve rod part 5 rotates. The arrangement is compact in structure and small in size, the electromagnetic valve 23 is used for being connected with a thermocouple, so that the gas valve has a flameout protection function, namely when the valve rod part 5 rotates, the driving mechanism enables the push rod 27 to be in top contact with the blocking part 232, the thermocouple is heated by flame of a gas appliance, the generated temperature difference voltage enables the electromagnetic valve 23 to overcome the elastic force of the spring I24, the blocking part 232 is adsorbed, the gas inlet end 2 is communicated with the vent hole 6 of the valve core 4 through the gas hole 26, and the driving mechanism enables the push rod 27 to reset after the gas valve is used; in the use, after the flame of gas utensil extinguishes, the difference in temperature voltage disappears, and solenoid valve 23 cuts off the power supply, and spring 24 makes shutoff portion 232 contradict again in keeping off shoulder 25 in order to cross gas pocket 26 shutoff, cuts off the air feed, guarantees the safety in utilization.

Drive mechanism includes that the cover is equipped with drives disk 28 and two 29 springs on the valve stem portion 5, two 29 springs are located and drive between disk 28 and the valve body 1, the outer wall of driving disk 28 has and is used for the spacing lug 281 or the recess of circumference, push rod 27 links firmly with driving disk 28 mutually, the gag lever post 30 radially wears to be equipped with on the valve stem portion 5, drive disk 28 has mirror symmetry's spacing groove 31 towards the terminal surface of gag lever post 30, one side cell wall of spacing groove 31 is for supplying the gliding inclined plane 311 of gag lever post 30, two 29 springs provide elasticity and make the spacing groove 31 be located the spacing groove 31. The outer wall of driving disk 28 in this embodiment is lug 281, drive 28 circumference of driving disk spacing in knob switch's casing, valve stem portion 5 is driven in order to make anticlockwise rotation by knob switch during the use, gag lever post 30 oppresses in inclined plane 311, make driving disk 28 to the displacement of valve body 1 side, drive 28 drive push rod 27 tops of driving disk and touch shutoff portion 232 in order admitting air, after the use, valve stem portion 5 drives gag lever post 30 and resets, two 29 springs provide elasticity and make gag lever post 30 be located the 31 tank bottoms of spacing groove again.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. A gas valve comprises a valve body (1), wherein a valve cavity is arranged in the valve body (1), the valve body (1) is provided with a gas inlet end (2) and a large and small fire gas outlet end (3) which are communicated with the valve cavity, a valve core (4) is arranged in the valve cavity, the gas valve is characterized in that the valve core (4) is spherical, the outer end of the valve core (4) is connected with a valve rod part (5), the inner end of the valve core (4) is provided with a vent hole (6) which is axially recessed and communicated with the gas inlet end (2), a sealing ring (7) for sealing the outer end and the inner end of the valve core (4) is arranged in the valve body (1), the middle part of the valve core (4) is radially provided with a first gas hole (8) and a second gas hole (9) which are communicated with the vent hole (6), the aperture of the first gas hole (8) is larger than that of the second gas hole (9), and the included angle between the first gas hole (8) and the second gas hole (9) is 90-120 degrees, the valve cavity between the left side of the valve core (4) and the valve body (1) is a left side sealing cavity, the valve cavity between the bottom of the valve core (4) and the valve body (1) is a bottom sealing cavity, the valve cavity between the right side of the valve core (4) and the valve body (1) is a vent cavity (10), the big fire and small fire air outlet end (3) is positioned at the top of the valve body (1), a big fire vent channel (11) communicated with the top of the valve core (4) and the big fire and small fire air outlet end (3) is arranged in the valve body (1), a small fire vent channel (12) communicated with the big fire and small fire air outlet ends (3) and the vent cavity (10) is arranged in the valve body (1), the aperture of the big fire vent channel (11) is larger than that of the small fire vent channel (12), the top of the valve body (1) is provided with a long open fire air outlet end (13), and a long fire vent channel (14) communicated with the long fire air outlet end (13) and the vent cavity (10) is arranged in the valve body (1), when the gas valve is in the closed position, first gas hole (8) seal by bottom seal chamber and second gas hole (9) are sealed by left side seal chamber, when the gas valve is in the air feed of long naked light and short fire, first gas hole (8) communicate in ventilate chamber (10) and second gas hole (9) are sealed by bottom seal chamber, when this gas valve is in the air feed of short fire, big fire and long naked light, first gas hole (8) communicate in big fire air vent (11) and second gas hole (9) communicate in ventilate chamber (10).

2. A gas valve according to claim 1, wherein the valve core (4) is radially provided with a third gas hole (15) communicated with the vent hole (6), the third gas hole (15) is arranged close to the first gas hole (8), the first gas hole (8) is positioned between the third gas hole (15) and the second gas hole (9), the aperture of the third gas hole (15) is smaller than that of the first gas hole (8), and when the gas valve is in the closed position, the third gas hole (15) is sealed by a bottom sealing cavity.

3. The gas valve according to claim 1 or 2, wherein the valve stem portion (5) and the valve core (4) are of an integrated structure, the valve stem portion (5) extends out of the valve body (1), one sealing ring (7) is embedded in the outer wall of the valve stem portion (5) close to the outer end of the valve core (4) and sealed on the inner wall of the valve body (1), the inner end of the valve core (4) is provided with a cylindrical portion (16) extending axially, and the other sealing ring (7) is embedded in the outer wall of the cylindrical portion (16) and sealed on the inner wall of the valve body (1).

4. A gas valve according to claim 3, wherein the valve body (1) is bolted with a big fire adjusting screw (17) which radially passes through the big fire air duct (11), the head of the big fire adjusting screw (17) is embedded with an O-ring (18) sealed in the valve body (1), and the inner end of the big fire adjusting screw (17) is close to the inner end of the big fire outlet end (3).

5. The gas valve according to claim 4, wherein the small fire vent passage (12) comprises a small fire vent hole I (121), a small fire vent hole II (122) and a small fire vent hole III (123), the small fire vent hole I (121) penetrates from the top of the valve body (1) to the vent cavity (10), a plugging piece for plugging the outer end of the small fire vent hole I (121) is fixedly connected to the top of the valve body (1), the small fire vent hole II (122) is positioned in the valve body (1) and communicated with the small fire vent hole I (121), the inner end of the small fire vent hole III (123) is communicated with the small fire vent hole II (122), the outer end of the small fire vent hole III (123) is communicated with the big fire outlet end (3), the valve body (1) is in threaded connection with the small fire adjusting screw (19), the head of the small fire adjusting screw (19) is embedded with an O-II (20) sealed on the valve body (1), the inner end of the small fire adjusting screw (19) is positioned at the inner end of the small fire vent hole III (123).

6. A gas valve according to claim 5, wherein the open flame vent (14) comprises a first open flame vent (141) and a second open flame vent (142), the first ever-open-flame vent hole (141) penetrates through the vent cavity (10) from the top of the valve body (1), the top of the valve body (1) is fixedly connected with a plugging piece for plugging the outer end of the first ever-open-flame vent hole (141), the inner end of the second open fire vent hole (142) is communicated with the first open fire vent hole (141), the outer end of the second open fire vent hole (142) is communicated with the vent end (13) of the open fire, the valve body (1) is in threaded connection with a pilot flame adjusting screw (21), an O-shaped ring III (22) sealed in the valve body (1) is embedded in the head of the pilot flame adjusting screw (21), and the inner end of the pilot flame adjusting screw (21) is located at the inner end of a pilot flame vent II (142).

7. A gas valve according to claim 6, wherein the big fire adjusting screw (17), the small fire adjusting screw (19) and the long open fire adjusting screw (21) are arranged in parallel, and the heads of the big fire adjusting screw, the small fire adjusting screw and the long open fire adjusting screw face the end of the valve body (1) through which the valve rod part (5) penetrates.

8. The gas valve according to claim 1 or 2, wherein the valve body (1) is provided with an electromagnetic valve (23) in the axial extension direction of the inner end of the valve core (4), the electromagnetic valve (23) is provided with a valve rod (231) extending towards the valve core (4), the end part of the valve rod (231) is a radially outward-protruding plugging part (232), the valve rod (231) is sleeved with a first spring (24), the inner wall of the valve body (1) is provided with a retaining shoulder (25) positioned between the valve core (4) and the plugging part (232), the center of the retaining shoulder (25) is provided with an air passing hole (26), the air inlet end (2) is communicated with a chamber of the valve body (1) for installing the electromagnetic valve (23), the first spring (24) provides elasticity to enable the plugging part (232) to plug the air passing hole (26), a push rod (27) axially penetrates through the valve rod part (5) and the inner end of the push rod (27) is positioned in the valve core (4), the valve rod part (5) is provided with a driving mechanism which drives the push rod (27) to push against the plugging part (232) and provides resetting force for the push rod (27) when the valve rod part (5) rotates.

9. The gas valve according to claim 8, wherein the driving mechanism comprises a driving disk (28) and a second spring (29) which are sleeved on the valve stem (5), the second spring (29) is located between the driving disk (28) and the valve body (1), a protrusion (281) or a groove for circumferential limiting is formed in the outer wall of the driving disk (28), the push rod (27) is fixedly connected with the driving disk (28), a limiting rod (30) is radially arranged on the valve stem (5) in a penetrating manner, mirror-symmetrical limiting grooves (31) are formed in the end face, facing the limiting rod (30), of the driving disk (28), one side groove wall of each limiting groove (31) is an inclined surface (311) for the limiting rod (30) to slide, and the second spring (29) provides elastic force so that the limiting grooves (31) are located in the limiting grooves (31).

10. The gas valve according to claim 1 or 2, wherein the left side of the valve body (1) is in threaded connection with a first plug (32), a left sealing ring (33) sealed on the left side of the valve core (4) is embedded in the first plug (32), the bottom of the valve body (1) is in threaded connection with a second plug (34), a bottom sealing ring (35) sealed on the bottom of the valve core (4) is embedded in the second plug (34), a hollow plug cap (36) is in threaded connection with the inner end of the big fire air duct (11), a top sealing ring (37) sealed on the top of the valve core (4) is embedded in the plug cap (36), and a valve cover (38) for sealing the outer end of the big fire air duct (11) is in threaded connection with the valve body (1).