CN111779855A - Multi-section fire valve core and gas regulating valve thereof - Google Patents

Multi-section fire valve core and gas regulating valve thereof Download PDF

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Publication number
CN111779855A
CN111779855A CN202010751220.3A CN202010751220A CN111779855A CN 111779855 A CN111779855 A CN 111779855A CN 202010751220 A CN202010751220 A CN 202010751220A CN 111779855 A CN111779855 A CN 111779855A
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CN
China
Prior art keywords
fire
hole
fine adjustment
valve core
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010751220.3A
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Chinese (zh)
Inventor
陈杰成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhongshan Chutut Metal Products Co ltd
Original Assignee
Zhongshan Chutut Metal Products Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhongshan Chutut Metal Products Co ltd filed Critical Zhongshan Chutut Metal Products Co ltd
Priority to CN202010751220.3A priority Critical patent/CN111779855A/en
Publication of CN111779855A publication Critical patent/CN111779855A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0207—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor with special plug arrangement, e.g. special shape or built in means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0214—Plug channel at 90 degrees to the inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0235—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor with the angle the spindle makes housing being other than 90 degrees
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices

Abstract

The invention provides a multi-section fire valve core which is of a cylindrical structure and comprises a first fire adjusting layer and a second fire adjusting layer, wherein the first fire adjusting layer and the second fire adjusting layer are of annular structures, the first fire adjusting layer and the second fire adjusting layer are sequentially arranged along the axial direction of the cylindrical structure of the multi-section fire valve core, a plurality of fuel gas adjusting holes are formed in the first fire adjusting layer and the second fire adjusting layer, a first fire adjusting area is arranged on the first fire adjusting layer, a second fire adjusting area is arranged on the second fire adjusting layer, the projections of the first fire adjusting area and the second fire adjusting area in the axial direction of the cylindrical structure of the multi-section fire valve core are in a fan shape, and the fan-shaped projection angle of the second fire adjusting area is not less than 180 degrees. The invention improves the adjusting capability of the valve core and provides more fire power selections for the gas appliance.

Description

Multi-section fire valve core and gas regulating valve thereof
Technical Field
The invention relates to a fire control valve core, in particular to a multi-section fire valve core and a fuel gas regulating valve thereof.
Background
The gas utensil has extensive application as domestic culinary art facility, and in the culinary art process, the user needs to adjust the firepower according to the culinary art condition to reach better culinary art effect. The gas appliance mostly adopts a fire control valve core structure to realize the control of gas flow, thereby achieving the adjustment of fire. The firepower required by cooking traditional Chinese dishes varies from big fire required by quick frying to small fire required by stewing for a plurality of hours, but the control area of the existing valve core is small, so that the selectable firepower of a user is limited, and the fuel gas is very easy to shut down in the adjusting process, thereby causing danger.
Disclosure of Invention
The invention provides a multi-section fire valve core and a gas regulating valve thereof, which are used for improving the regulating capacity of the valve core and providing more fire choices for a gas appliance.
The invention provides a multi-section fire valve core which is of a column structure and comprises a first fire adjusting layer and a second fire adjusting layer, wherein the first fire adjusting layer and the second fire adjusting layer are of annular structures and are sequentially arranged along the axial direction of the column structure of the multi-section fire valve core, the first fire adjusting layer and the second fire adjusting layer are respectively provided with a plurality of gas adjusting holes, a first fire adjusting area is arranged on the first fire adjusting layer, a second fire adjusting area is arranged on the second fire adjusting layer, the first fire adjusting area is formed by sequentially arranging the gas adjusting holes on the first fire adjusting layer, the second fire adjusting area is formed by sequentially arranging the gas adjusting holes on the second fire adjusting layer, and the projections of the first fire adjusting area and the second fire adjusting area in the axial direction of the column structure of the multi-section fire valve core are all in a fan shape, the projections of the first fire adjusting area and the second fire adjusting area in the axial direction of the multi-section fire valve core column structure are overlapped, and the fan-shaped projection angle of the second fire adjusting area is not smaller than 180 degrees.
Further, the gas regulating hole is selected from one or more of a strip hole, a through hole and a fine regulating hole.
Furthermore, the first fire adjusting layer comprises a through hole, a first fine adjusting hole and a second fine adjusting hole, the through hole, the first fine adjusting hole and the second fine adjusting hole are sequentially adjacent along the annular structure of the first fire adjusting layer, and the minimum diameters of the through hole, the first fine adjusting hole and the second fine adjusting hole are sequentially reduced.
Furthermore, the second fire power adjusting layer comprises a strip-shaped hole, a third fine adjusting hole, a fourth fine adjusting hole and a fifth fine adjusting hole, the strip-shaped hole, the third fine adjusting hole, the fourth fine adjusting hole and the fifth fine adjusting hole are sequentially adjacent along the annular structure of the second fire power adjusting layer, one end of the strip-shaped hole faces the third fine adjusting hole, the minimum diameters of the third fine adjusting hole, the fourth fine adjusting hole and the fifth fine adjusting hole are sequentially reduced, and the arrangement direction of the third fine adjusting hole, the fourth fine adjusting hole and the fifth fine adjusting hole on the second fire power adjusting layer is the same as the arrangement direction of the straight-through hole, the first fine adjusting hole and the second fine adjusting hole on the first fire power adjusting layer.
Furthermore, the strip-shaped hole is a waist-shaped hole, and two ends of the waist-shaped hole are arc-shaped.
Furthermore, the fine tuning hole comprises a ventilation part and an expanding part, the ventilation part comprises a through hole section and a conical hole section, the conical hole section is a conical hole, the expanding part is a round hole, one end of the through hole section is connected with the conical tip of the conical hole section, the expanding part is connected with the conical bottom of the conical hole section, the diameter of the expanding part is not smaller than the maximum diameter of the conical hole section, the through hole section is connected with the inner side of the multi-section fire valve core, and the expanding part is connected with the outer side of the multi-section fire valve core.
Further, the taper angle of the tapered bore section is 90 degrees.
Furthermore, one end of the flaring part, which is positioned on the outer side of the multi-section fire valve core, is superposed with the extension line of the taper hole section.
Furthermore, the multistage firepower valve core is of a cylindrical structure, and an included angle between through hole sections of adjacent fine adjustment holes of the second firepower adjusting layer is 45 degrees.
The invention also discloses a gas regulating valve which applies the multi-section fire valve core.
Compared with the prior art, the invention improves the size of the second firepower adjusting area and enlarges the firepower adjusting range of the valve core by utilizing the combination of the plurality of fuel gas adjusting holes, so that a user can select proper firepower more conveniently for cooking.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a side view of an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a first thermal power adjusting layer according to an embodiment of the present invention;
FIG. 5 is a schematic sectional view of a second flame adjusting layer according to an embodiment of the invention;
fig. 6 is an enlarged schematic view of a fifth fine tuning hole according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The embodiment of the invention discloses a multi-section fire valve core, as shown in figures 1-6, the multi-section fire valve core is of a column structure, the multi-section fire valve core comprises a first fire adjusting layer 1 and a second fire adjusting layer 2, the first fire adjusting layer 1 and the second fire adjusting layer 2 are both of ring structures, the first fire adjusting layer 1 and the second fire adjusting layer 2 are sequentially arranged along the axial direction of the column structure of the multi-section fire valve core, the first fire adjusting layer 1 and the second fire adjusting layer 2 are both provided with a plurality of fuel gas adjusting holes, a first fire adjusting area is arranged on the first fire adjusting layer 1, a second fire adjusting area is arranged on the second fire adjusting layer 2, the first fire adjusting area is formed by sequentially arranging the fuel gas adjusting holes on the first fire adjusting layer 1, and the second fire adjusting area is formed by sequentially arranging the fuel gas adjusting holes on the second fire adjusting layer 2, the projections of the first fire adjusting area and the second fire adjusting area in the axial direction of the multi-section fire valve core columnar structure are fan-shaped, the projections of the first fire adjusting area and the second fire adjusting area in the axial direction of the multi-section fire valve core columnar structure are overlapped, and the fan-shaped projection angle of the second fire adjusting area is not smaller than 180 degrees.
Optionally, the gas regulating hole is selected from one or more of a strip hole, a straight hole and a fine regulating hole.
Specifically, as shown in fig. 4, the first thermal power adjustment layer 1 includes a through hole 11, a first fine adjustment hole 12, and a second fine adjustment hole 13, the through hole 11, the first fine adjustment hole 12, and the second fine adjustment hole 13 are adjacent to each other in the loop structure of the first thermal power adjustment layer 1, and the minimum diameters of the through hole 11, the first fine adjustment hole 12, and the second fine adjustment hole 13 decrease in the loop structure.
Among them, as shown in fig. 4, the through hole 11 is a simple through hole structure. The first fine tuning hole 12 and the second fine tuning hole 13 are both fine tuning hole structures.
Specifically, as shown in fig. 5, the second thermal power adjustment layer 2 includes a stripe-shaped hole 21, a third fine adjustment hole 22, a fourth fine adjustment hole 23, and a fifth fine adjustment hole 24, the stripe-shaped hole 21, the third fine adjustment hole 22, the fourth fine adjustment hole 23, and the fifth fine adjustment hole 24 are sequentially adjacent to each other along the loop structure of the second thermal power adjustment layer 2, one end of the stripe-shaped hole 21 faces the third fine adjustment hole 22, the minimum diameters of the third fine adjustment hole 22, the fourth fine adjustment hole 23, and the fifth fine adjustment hole 24 are sequentially decreased, and the arrangement direction of the third fine adjustment hole 22, the fourth fine adjustment hole 23, and the fifth fine adjustment hole 24 on the second thermal power adjustment layer 2 is the same as the arrangement direction of the straight hole 11, the first fine adjustment hole 12, and the second fine adjustment hole 13 on the first thermal power adjustment layer 1.
As shown in fig. 5, the strip-shaped hole 21 is a waist-shaped hole, and the whole waist-shaped hole is a long hole, and two ends of the long hole are arc-shaped structures 211.
As shown in fig. 6, the fine adjustment holes have the same structure, and taking the fifth fine adjustment hole 24 as an example, the fifth fine adjustment hole may optionally have a structure of a vent portion and an expanded portion 243, the vent portion includes a through hole section 241 and a tapered hole section 242, the tapered hole section 242 is a tapered hole, the expanded portion 243 is a circular hole, one end of the through hole section 241 is connected to a tapered tip end of the tapered hole section 242, the expanded portion 243 is connected to a tapered bottom end of the tapered hole section 242, the diameter of the expanded portion 243 is not less than the maximum diameter of the tapered hole section 242, the through hole section 241 is connected to the inner side of the multi-stage fire valve core, and the expanded portion 243 is connected to the outer side of the multi-stage fire valve core.
As shown in fig. 6, the through hole section 241 is a straight tube structure, the tapered hole of the tapered hole section 242 has a tapered tip end and a tapered bottom end, the through hole section 241 and the flared portion 24 are respectively communicated with the tapered tip end and the tapered bottom end of the tapered hole section 242, and the flared portion 243 is further provided with an annular groove structure at the outer side of the tapered bottom end of the tapered hole section 242.
According to the embodiment of the invention, the contact surface of the fine adjustment hole and the gas pipeline is enlarged by the flared part through the structure of the fine adjustment hole, and the structure of the through hole section is adopted, so that the ventilation function is ensured, the structural space of the valve core is not excessively occupied, the valve core is ensured to be adjustable in a large range, and the high strength is still maintained.
In particular, as shown in FIG. 6, the tapered bore section 242 has a taper angle of 90 degrees.
Wherein the section taper angle of the tapered bore section 242 is 90 degrees as shown in fig. 6.
Specifically, as shown in fig. 6, one end of the flared portion 243 located outside the multistage fire valve core overlaps with an extension line of the tapered hole section 242.
As shown in fig. 6, the extension line of the tapered hole section 242 is in a horn-shaped structure, and one end of the flared portion 243 located outside the multi-stage fire valve core is overlapped with the horn-shaped structure.
Particularly, as shown in fig. 5, the multi-section fire valve core is of a cylindrical structure, and an included angle between through hole sections 241 of adjacent micro-adjusting holes of the second fire adjusting layer 2 is 45 degrees.
As shown in fig. 5, the included angles between the third fine tuning hole 22 and the fourth fine tuning hole 23, and between the fourth fine tuning hole 23 and the fifth fine tuning hole 24 are both 45 degrees. As shown in fig. 5 and 6, the through hole 11 and the third fine adjustment hole 22 are overlapped in the projection in the axial direction of the multistage fire power spool column structure, the first fine adjustment hole 12 and the fourth fine adjustment hole 23 are overlapped in the projection in the axial direction of the multistage fire power spool column structure, and the second fine adjustment hole 13 and the fifth fine adjustment hole 24 are overlapped in the projection in the axial direction of the multistage fire power spool column structure.
The multi-section fire valve core is of an integrated column structure, and the first fire adjusting layer 1 and the second fire adjusting layer 2 are different parts of the multi-section fire valve core in the axial direction. The first thermal power adjusting area is a fan-shaped structure composed of a through hole 11, a first fine adjustment hole 12 and a second fine adjustment hole 13 (a plurality of fine adjustment bar-shaped holes can be arranged on the basis of the first fine adjustment hole 12 and the second fine adjustment hole 13 as required to enlarge an adjustable range), and the second thermal power adjusting area is a fan-shaped structure composed of a third fine adjustment hole 21, a third fine adjustment hole 22, a fourth fine adjustment hole 23 and a fifth fine adjustment hole 24. As shown in fig. 4, the central angle of the first fire power adjustment section fan-shaped structure exceeds 120 degrees or more. As shown in fig. 5, the central angle of the second fire power adjustment zone fan-shaped structure exceeds 240 degrees. The partial region of the first fire adjustment zone fan-shaped structure does not coincide with the second fire adjustment zone fan-shaped structure.
In practical application, the first fire power adjusting layer 1 can be connected with an outer ring fuel gas channel of a fuel gas appliance, the second fire power adjusting layer 2 can be connected with an inner ring fuel gas channel of the fuel gas appliance, and different fuel gas adjusting holes of the first fire power adjusting layer 1 and the second fire power adjusting layer 2 are communicated with the fuel gas channels through a rotary valve core to form various combined fire power. Particularly, the first fire power adjusting area and the second fire power adjusting area are partially overlapped, and the first fire power adjusting area and the second fire power adjusting area can be independently communicated with the gas channel by rotating the valve core, so that independent ventilation of the outer ring gas channel and the inner ring gas channel is realized, and the fire power selectable range is enlarged.
The diameters of the through hole sections 241 of the third fine tuning hole 22, the fourth fine tuning hole 23 and the fifth fine tuning hole 24 are sequentially reduced, and a user can respectively communicate with a channel of a gas appliance by rotating the multi-section fire valve core through the third fine tuning hole 22, the fourth fine tuning hole 23 and the fifth fine tuning hole 2, so that the control and adjustment of the gas flux are realized, and the effect of accurately controlling the fire is achieved.
The embodiment of the invention also discloses a gas regulating valve which adopts the multi-section fire valve core.
Wherein, the multi-section fire valve core can adopt the valve core structure.
According to the embodiment of the invention, the size of the second fire adjusting area is increased by using the combination of the plurality of fuel gas adjusting holes, the fire adjusting range of the valve core is expanded, and a user can select proper fire more conveniently for cooking.
Finally, it should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the modifications and equivalents of the specific embodiments of the present invention can be made by those skilled in the art after reading the present specification, but these modifications and variations do not depart from the scope of the claims of the present application.

Claims (10)

1. The multi-section fire valve core is characterized in that the multi-section fire valve core is of a column structure and comprises a first fire adjusting layer and a second fire adjusting layer, wherein the first fire adjusting layer and the second fire adjusting layer are of an annular structure, the first fire adjusting layer and the second fire adjusting layer are sequentially arranged along the axial direction of the column structure of the multi-section fire valve core, the first fire adjusting layer and the second fire adjusting layer are respectively provided with a plurality of gas adjusting holes, a first fire adjusting area is arranged on the first fire adjusting layer, a second fire adjusting area is arranged on the second fire adjusting layer, the first fire adjusting area is formed by sequentially arranging gas adjusting holes in the first fire adjusting layer, the second fire adjusting area is formed by sequentially arranging gas adjusting holes in the second fire adjusting layer, and the first fire adjusting area, The projections of the second fire adjusting area in the axial direction of the multi-section fire valve core column structure are all fan-shaped, the projections of the first fire adjusting area and the second fire adjusting area in the axial direction of the multi-section fire valve core column structure are overlapped, and the fan-shaped projection angle of the second fire adjusting area is not smaller than 180 degrees.
2. The multistage fire power valve core according to claim 1, wherein the gas regulating hole is selected from one or more of a strip hole, a straight hole and a fine regulating hole.
3. The multistage fire valve core according to claim 2, wherein the first fire adjusting layer comprises a through hole, a first fine adjustment hole and a second fine adjustment hole, the through hole, the first fine adjustment hole and the second fine adjustment hole are sequentially adjacent along the annular structure of the first fire adjusting layer, and the minimum diameters of the through hole, the first fine adjustment hole and the second fine adjustment hole are sequentially reduced.
4. The multistage fire power valve core of claim 3, wherein the second fire power adjusting layer includes a bar-shaped hole, a third fine adjustment hole, a fourth fine adjustment hole, and a fifth fine adjustment hole, the bar-shaped hole, the third fine adjustment hole, the fourth fine adjustment hole, and the fifth fine adjustment hole are sequentially adjacent along the loop structure of the second fire power adjusting layer, one end of the bar-shaped hole faces the third fine adjustment hole, the minimum diameters of the third fine adjustment hole, the fourth fine adjustment hole, and the fifth fine adjustment hole are sequentially reduced, and the third fine adjustment hole, the fourth fine adjustment hole, and the fifth fine adjustment hole are arranged in the second fire power adjusting layer in the same direction as the straight holes, the first fine adjustment hole, and the second fine adjustment hole are arranged in the first fire power adjusting layer.
5. The multistage fire valve core according to claim 2, wherein the strip-shaped hole is a kidney-shaped hole, and both ends of the kidney-shaped hole are circular arcs.
6. The multistage fire valve core according to claim 2, wherein the fine adjustment hole comprises a vent part and an expanding part, the vent part comprises a through hole section and a conical hole section, the conical hole section is a conical hole, the expanding part is a round hole, one end of the through hole section is connected with a conical tip of the conical hole section, the expanding part is connected with a conical bottom of the conical hole section, the diameter of the expanding part is not smaller than the maximum diameter of the conical hole section, the through hole section is connected with the inner side of the multistage fire valve core, and the expanding part is connected with the outer side of the multistage fire valve core.
7. The multiple stage fire valve cartridge of claim 6, wherein the taper angle of the tapered bore section is 90 degrees.
8. The multistage fire power valve core according to claim 6, wherein one end of the flared portion located outside the multistage fire power valve core coincides with an extension line of the tapered hole section.
9. The multistage fire valve core according to claim 6, wherein the multistage fire valve core is of a cylindrical structure, and an included angle between through hole sections of adjacent fine adjustment holes of the second fire adjustment layer is 45 degrees.
10. A gas regulating valve, characterized in that the gas regulating valve uses the multi-stage fire valve core of any one of claims 1 to 9.
CN202010751220.3A 2020-07-30 2020-07-30 Multi-section fire valve core and gas regulating valve thereof Pending CN111779855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010751220.3A CN111779855A (en) 2020-07-30 2020-07-30 Multi-section fire valve core and gas regulating valve thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010751220.3A CN111779855A (en) 2020-07-30 2020-07-30 Multi-section fire valve core and gas regulating valve thereof

Publications (1)

Publication Number Publication Date
CN111779855A true CN111779855A (en) 2020-10-16

Family

ID=72765474

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010751220.3A Pending CN111779855A (en) 2020-07-30 2020-07-30 Multi-section fire valve core and gas regulating valve thereof

Country Status (1)

Country Link
CN (1) CN111779855A (en)

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