CN113324047A - Kitchen gas valve and kitchen gas cut-off control system - Google Patents
Kitchen gas valve and kitchen gas cut-off control system Download PDFInfo
- Publication number
- CN113324047A CN113324047A CN202110625251.9A CN202110625251A CN113324047A CN 113324047 A CN113324047 A CN 113324047A CN 202110625251 A CN202110625251 A CN 202110625251A CN 113324047 A CN113324047 A CN 113324047A
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- valve
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- conical surface
- rod
- valve cover
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to a kitchen gas valve and a kitchen gas cut-off control system, wherein the kitchen gas valve comprises a valve seat, a valve cover, a valve rod and an opening and closing part, wherein an external thread section is arranged on the valve rod, an internal thread section is arranged in a valve cover hole, the internal thread section is positioned at one end close to the valve seat in the valve cover hole, a variable diameter sealing section is arranged at one side of the valve cover hole, facing the outside atmosphere, of the internal thread section, and the variable diameter sealing section mainly comprises two internal conical surface sections which are arranged at intervals; the valve rod is provided with a part of variable diameter in the valve cover hole and comprises a base rod and two matching bulges which protrude outwards along the base rod, the two matching bulges are arranged at intervals, the outer side surface of each matching bulge facing the hole wall of the valve cover hole is an outer conical surface matched with the inner conical surface section, and the small diameter ends of the two matching bulges are arranged oppositely; the matching bulge and the inner conical surface section are in abutting fit, so that the air tightness and the safety in the using process can be ensured.
Description
Technical Field
The invention relates to the technical field of gas valves, in particular to a kitchen gas valve and a kitchen gas cut-off control system.
Background
The gas valve is a safety matching device on a gas pipeline, is used for cutting off and connecting gas in the pipeline, and is suitable for various gas medium pipelines such as city gas, liquefied petroleum gas, natural gas, oxygen and the like. The existing manual cut-off gas valve is provided with a through flow channel inside a valve seat, an opening and closing piece inside the through flow channel, a valve cover is fixed on the valve seat, and the valve rod in threaded fit with the valve cover drives the opening and closing piece to move so as to realize the on-off of the valve. After long-time use, the thread corrosion influences the air tightness of the gas valve, the gas valve is easy to leak, and great potential safety hazards are realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a gas valve which can solve the problems of poor air tightness and poor safety after the existing gas valve is used for a long time;
the invention also aims to provide a kitchen gas cut-off control system which can solve the problems of poor gas tightness of the gas valve and poor kitchen use safety after the existing gas valve is used for a long time.
The invention provides the following technical scheme: a kitchen gas valve comprises a valve seat, a valve cover, a valve rod and an opening and closing part, wherein a through-flow passage is arranged in the valve seat, the opening and closing part is positioned in the through-flow passage, the valve cover is fixed on the valve seat and is provided with a valve cover hole for the valve rod to pass through, an external thread section is arranged on the valve rod, an internal thread section is arranged in the valve cover hole, the valve rod passes through the valve cover hole and extends into the valve seat and is in threaded fit with the valve cover hole, and the valve rod controls the opening and closing part to do linear reciprocating motion so as to realize the on-off of the through-flow passage; the valve cover hole is provided with a variable-diameter sealing section at one side of the valve cover hole, which faces the outside atmosphere, and the variable-diameter sealing section mainly comprises two inner conical surface sections which are arranged at intervals, the small-diameter ends of the two inner conical surface sections are arranged in opposite directions, and the two inner conical surface sections are spaced by equal-diameter sections;
the part of the valve rod, which is positioned on one side of the external thread section towards the external atmosphere, comprises a base rod and a matching bulge which protrudes outwards along the base rod, the outer diameter of the base rod is smaller than the minimum inner diameter of the thread section in the valve cover hole and is matched with the equal-diameter section, and the equal-diameter section is provided with at least one stage of sealing ring which is used for sliding sealing matching with the base rod; the cooperation is protruding to be equipped with two, and two cooperation are protruding to be set up at interval and two cooperation are protruding distance between is greater than the length of constant diameter section, and the lateral surface towards the valve bonnet hole pore wall on two cooperation are protruding for the outer conical surface with two interior conical surface section adaptations respectively, and two protruding path end sets up in opposite directions of cooperation.
Has the advantages that: the kitchen gas valve has the following use process: when the valve is closed, the valve rod is rotated to enable the valve rod to move towards the inside of the valve seat, the opening and closing piece blocks the through-flow channel, the matching protrusion above the valve rod, which is close to the outside atmosphere, is tightly abutted to the inner conical surface section, which is close to the outside atmosphere, when the valve is opened, the valve rod is rotated to enable the valve rod to move towards the outside of the valve seat until the matching protrusion on the valve rod, which is close to the valve seat, is tightly abutted to the inner conical surface section, and in addition, in the rotating process of the valve rod, the base rod on the valve rod is in sealing fit with the equal-diameter section in the valve cover hole.
Furthermore, the outer side of the inner conical surface section is coated with a rubber strip.
Has the advantages that: the rubber strip can make the cooperation protruding inseparabler with the cooperation of interior conical surface section, sets up the rubber strip, has reduced the machining precision requirement to cooperation arch and interior conical surface section, is favorable to reducing the processing cost.
The kitchen gas cutting control system of the invention provides the following technical scheme: a kitchen gas cut-off control system comprises a temperature sensor, a gas concentration detector, a smoke sensor, a controller, an alarm and a kitchen gas valve, wherein the temperature sensor, the gas concentration detector, the smoke sensor and the alarm are respectively connected with the controller, and the controller warns through the alarm according to transmission signals of the temperature sensor, the gas concentration detector and the smoke sensor; the kitchen gas valve comprises a valve seat, a valve cover, a valve rod and an opening and closing part, wherein a through-flow passage is arranged in the valve seat, the opening and closing part is positioned in the through-flow passage, the valve cover is fixed on the valve seat and is provided with a valve cover hole for the valve rod to pass through, an external thread section is arranged on the valve rod, an internal thread section is arranged in the valve cover hole, the valve rod passes through the valve cover hole, extends into the valve seat and is in threaded fit with the valve cover hole, and the valve rod controls the opening and closing part to do linear reciprocating motion so as to realize the on-off of the through-flow passage; the valve cover hole is provided with a variable-diameter sealing section at one side of the valve cover hole, which faces the outside atmosphere, and the variable-diameter sealing section mainly comprises two inner conical surface sections which are arranged at intervals, the small-diameter ends of the two inner conical surface sections are arranged in opposite directions, and the two inner conical surface sections are spaced by equal-diameter sections;
the part of the valve rod, which is positioned on one side of the external thread section towards the external atmosphere, comprises a base rod and a matching bulge which protrudes outwards along the base rod, the outer diameter of the base rod is smaller than the minimum inner diameter of the thread section in the valve cover hole and is matched with the equal-diameter section, and the equal-diameter section is provided with at least one stage of sealing ring which is used for sliding sealing matching with the base rod; the cooperation is protruding to be equipped with two, and two cooperation are protruding to be set up at interval and two cooperation are protruding distance between is greater than the length of constant diameter section, and the lateral surface towards the valve bonnet hole pore wall on two cooperation are protruding for the outer conical surface with two interior conical surface section adaptations respectively, and two protruding path end sets up in opposite directions of cooperation.
Has the advantages that: the kitchen gas valve in the kitchen gas cutting control system has the following use process: when the valve is closed, the valve rod is rotated to enable the valve rod to move towards the inside of the valve seat, the opening and closing piece blocks the through-flow channel, the matching protrusion above the valve rod, which is close to the outside atmosphere, is tightly abutted to the inner conical surface section, which is close to the outside atmosphere, when the valve is opened, the valve rod is rotated to enable the valve rod to move towards the outside of the valve seat until the matching protrusion on the valve rod, which is close to the valve seat, is tightly abutted to the inner conical surface section, and in addition, in the rotating process of the valve rod, the base rod on the valve rod is in sealing fit with the equal-diameter section in the valve cover hole. In addition, the invention considers the situations that the kitchen fire or the gas leakage occurs and the like which need to close the kitchen gas valve, the temperature sensor, the gas concentration detector and the smoke sensor are used for respectively monitoring the temperature change, the gas concentration and the smoke concentration in the kitchen in real time, the three monitoring elements monitor from three aspects at the same time, the detection error caused by the inaccuracy of a certain parameter in the air when the fire or the gas leakage occurs can be made as much as possible, the monitoring is comprehensive, and the safety is good; after the controller controls the alarm to give an alarm, the manual work can rapidly cut off the kitchen gas valve according to the alarm so as to avoid greater safety accidents.
Furthermore, the outer side of the inner conical surface section is coated with a rubber strip.
Has the advantages that: the rubber strip can make the cooperation protruding inseparabler with the cooperation of interior conical surface section, sets up the rubber strip, has reduced the machining precision requirement to cooperation arch and interior conical surface section, is favorable to reducing the processing cost.
Drawings
FIG. 1 is a schematic view showing the internal structure of a kitchen gas valve according to an embodiment 1 of the present invention;
FIG. 2 is a schematic detail at A in FIG. 1;
FIG. 3 is a flow chart of embodiment 1 of a kitchen gas shutoff control system of the present invention;
reference numerals: 1-a valve seat; 2-a through-flow channel; 3-opening and closing piece; 4-valve cover; 5-valve stem; 6-reducing sealing section; 8-hand wheel; 9-internal thread section; 10-a first inner conical surface section; 11-a second inner conical surface section; 12-an external thread section; 13-a base shaft; 14-a first mating projection; 15-a second mating projection; 16-constant diameter section; 17-sealing ring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
the kitchen gas valve is structurally shown in figures 1-2 and mainly comprises a valve seat 1, a valve cover 4, a valve rod 5 and an opening and closing piece 3, wherein the valve seat 1 is internally provided with a through-flow passage 2, and the opening and closing piece 3 is arranged inside the through-flow passage 2. The valve cover 4 is fixed on the valve seat 1, a valve cover hole for the valve rod 5 to pass through is formed in the valve cover 4, the valve rod 5 penetrates through the valve cover hole and then extends into the valve seat 1, and the opening and closing piece 3 is made to perform linear reciprocating motion by moving the valve rod 5, so that the opening and closing of the through-flow channel, namely the opening and closing of the valve, are realized.
The detailed structure of the valve cap hole and the valve rod 5 is shown in fig. 2, and the upper end of the valve seat hole is the side close to the external atmosphere, and the lower end is the side close to the valve seat 1 by taking the direction shown in fig. 1 and 2 as a reference; in fig. 1-2, the lower end in the valve cap hole is provided with an internal thread section 9, and correspondingly, the lower end of the valve rod 5 is provided with an external thread section 12, the upper side of the internal thread section 9 in the valve cap hole is also provided with a variable diameter sealing section 6, the variable diameter sealing section 6 mainly comprises two internal conical surface sections and an equal diameter section 16 positioned between the two internal conical surfaces, the two internal conical surface sections are respectively a first internal conical surface section 10 positioned on the upper side and a second internal conical surface section 11 positioned on the lower side, and the small diameter ends of the two internal conical surface sections are arranged in opposite directions, namely, the direction of the first internal conical surface section 10 is upward, and the direction of the second internal conical surface section 11 is downward.
The part of the valve rod 5, which is positioned on the upper side of the external thread section 12, is positioned in the reducing sealing section 6 and is used for being matched with the reducing sealing section 6, the part mainly comprises a base rod 13 and a matching bulge arranged on the outer side of the base rod, and in order to ensure that the base rod 13 can move in the internal thread section 9, the outer diameter of the base rod 13 is smaller than the minimum inner diameter of the internal thread section 9. The cooperation is protruding to correspond two interior conical surface sections and is set up, is equipped with two, is protruding 14 and the second cooperation that is located the downside for the first cooperation that is located the upside respectively and protruding 15, and is corresponding, and the lateral surface towards bonnet hole pore wall is the outer conical surface on first cooperation is protruding 14 and the second cooperation is protruding 15, the outer conical surface of first cooperation arch 14 be used for with first interior conical surface section 10 looks adaptation, the outer conical surface of the protruding 15 of second cooperation be used for with the 11 looks adaptations of second interior conical surface section. In order to ensure that the valve rod 5 can move up and down, the first matching protrusion 14 and the second matching protrusion 15 are arranged at intervals, and the distance between the first matching protrusion and the second matching protrusion is larger than the length of the equal-diameter section 16. The outer diameter of the base rod 13 is matched with the inner diameter of the equal-diameter section 16 between the two inner conical surface sections, and two-stage sealing rings 17 are arranged on the equal-diameter section 16 to ensure that the base rod 13 is in sealing fit with the equal-diameter section 16. In other embodiments, three, four or other numbers of sealing rings on the equal diameter section can be provided.
The upper end of the valve rod 5 is provided with the hand wheel 8, the valve rod 5 can be screwed through the hand wheel 8 to move up and down along the valve cover hole during operation, the opening and closing piece 3 blocks the through-flow channel 2 after the valve rod 5 moves down, the valve disclosed by the invention can be kept in a closed state as shown in figure 1, and at the moment, the first matching bulge 14 at the upper end of the valve rod 5 tightly abuts against the first inner conical surface section 10, so that better air tightness can be kept between the valve rod 5 and the valve cover 4; after screwing the hand wheel 8, the valve rod 5 moves upwards, the opening and closing part 3 moves upwards, the through-flow channel 2 is communicated, the hand wheel is stopped to be screwed until the second matching protrusion 15 is tightly abutted to the second inner conical surface section 11, the valve rod 5 and the valve cover 4 are kept in good air tightness, and the base rod 13 and the equal-diameter section 16 are kept in dynamic sealing matching, so that the fuel gas of the valve seat 1 is not easy to leak in the opening and closing state or the opening and closing process of the valve. In this embodiment, in order to ensure that the two matching protrusions and the two inner conical surface sections are more tightly pressed against each other, the two inner conical surface sections are both coated with rubber strips, and the other function of the structure is to reduce the requirement on the processing precision of the two matching protrusions and the two inner conical surface sections, thereby being beneficial to reducing the processing cost.
In conclusion, the kitchen gas valve has triple sealing structures in an opening or closing state, namely the matching of the inner thread section and the outer thread section, the sealing matching of the constant-diameter section 16 and the base rod 13 and the tight abutting effect of the matching protrusion and the corresponding inner conical surface section, so that the kitchen gas valve is good in overall air tightness, external gas and moisture are not prone to entering the inner part of the valve cover hole to corrode threads, and other sealing structures are matched even if the threads are loosened to avoid gas leakage.
the kitchen gas cut-off control system mainly comprises a temperature sensor, a gas concentration detector, a smoke sensor, a controller, an alarm and a kitchen gas valve, and the specific structure of the kitchen gas valve in the kitchen gas cut-off control system is the same as that in the embodiment of the kitchen gas valve, and is not described again here.
As shown in fig. 3, the temperature sensor, the gas concentration detector, the smoke sensor and the alarm are respectively electrically connected to the controller, the temperature sensor is used for measuring the temperature in the kitchen, and the gas concentration detector is used for monitoring the gas concentration in the kitchen and providing the controller with a basis for whether gas leakage occurs; smoke transducer then is used for measuring the smog concentration in the kitchen, set up temperature sensor and smoke transducer and consider not only needing to send the police dispatch newspaper when the gas is revealed and remind operating personnel to close the gas pipeline, also need close the gas pipeline when accidental fire, in order to arouse follow-up serious incident, temperature sensor and smoke transducer detect simultaneously, can avoid the potential safety hazard that single sensor measurement is inaccurate to have, consequently, no matter be the high temperature, under the high or high arbitrary one condition of gas concentration of smog concentration, the controller all can control the siren and warn, remind operating personnel to close kitchen gas valve, guarantee safe use gas.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (3)
1. A kitchen gas valve comprises a valve seat, a valve cover, a valve rod and an opening and closing part, wherein a through-flow passage is arranged in the valve seat, the opening and closing part is positioned in the through-flow passage, the valve cover is fixed on the valve seat and is provided with a valve cover hole for the valve rod to pass through, an external thread section is arranged on the valve rod, an internal thread section is arranged in the valve cover hole, the valve rod passes through the valve cover hole and extends into the valve seat and is in threaded fit with the valve cover hole, and the valve rod controls the opening and closing part to do linear reciprocating motion so as to realize the on-off of the through-flow passage; the valve is characterized in that the internal thread section is positioned at one end of the valve cover hole close to the valve seat, the valve cover hole is provided with a variable-diameter sealing section at one side of the internal thread section towards the outside atmosphere, the variable-diameter sealing section mainly comprises two inner conical surface sections which are arranged at intervals, the small-diameter ends of the two inner conical surface sections are arranged oppositely, and the two inner conical surface sections are spaced by equal-diameter sections;
the part of the valve rod, which is positioned on one side of the external thread section towards the external atmosphere, comprises a base rod and a matching bulge which protrudes outwards along the base rod, the outer diameter of the base rod is smaller than the minimum inner diameter of the thread section in the valve cover hole and is matched with the equal-diameter section, and the equal-diameter section is provided with at least one stage of sealing ring which is used for sliding sealing matching with the base rod; the cooperation is protruding to be equipped with two, and two cooperation are protruding to be set up at interval and two cooperation are protruding distance between is greater than the length of constant diameter section, and the lateral surface towards the valve bonnet hole pore wall on two cooperation are protruding for the outer conical surface with two interior conical surface section adaptations respectively, and two protruding path end sets up in opposite directions of cooperation.
2. A kitchen gas valve as claimed in claim 1, wherein said inner conical section is externally coated with a rubber strip.
3. A kitchen gas cut-off control system is characterized by comprising a temperature sensor, a gas concentration detector, a smoke sensor, a controller, an alarm and the kitchen gas valve as claimed in claim 1 or 2, wherein the temperature sensor, the gas concentration detector, the smoke sensor and the alarm are respectively connected with the controller, and the controller gives an alarm through the alarm according to transmission signals of the temperature sensor, the gas concentration detector and the smoke sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625251.9A CN113324047B (en) | 2021-06-04 | 2021-06-04 | Kitchen gas valve and kitchen gas cut-off control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625251.9A CN113324047B (en) | 2021-06-04 | 2021-06-04 | Kitchen gas valve and kitchen gas cut-off control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113324047A true CN113324047A (en) | 2021-08-31 |
| CN113324047B CN113324047B (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110625251.9A Active CN113324047B (en) | 2021-06-04 | 2021-06-04 | Kitchen gas valve and kitchen gas cut-off control system |
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| Country | Link |
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| CN (1) | CN113324047B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1667203A (en) * | 1926-10-04 | 1928-04-24 | Ernest C Harris | Valve |
| CN1399086A (en) * | 2001-07-22 | 2003-02-26 | 孙德宣 | Up-sealed downstream sealed valve |
| CN204759681U (en) * | 2015-07-18 | 2015-11-11 | 上海鸿维物联网技术工程有限公司 | Safety perception of multi -parameter kitchen and shutoff alarm system |
| CN206329752U (en) * | 2016-12-30 | 2017-07-14 | 郴州万墨环保科技有限公司 | A kind of self compensation vacuum valve |
| CN206639347U (en) * | 2017-03-30 | 2017-11-14 | 黄强 | Domestic gas safety automaton |
-
2021
- 2021-06-04 CN CN202110625251.9A patent/CN113324047B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1667203A (en) * | 1926-10-04 | 1928-04-24 | Ernest C Harris | Valve |
| CN1399086A (en) * | 2001-07-22 | 2003-02-26 | 孙德宣 | Up-sealed downstream sealed valve |
| CN204759681U (en) * | 2015-07-18 | 2015-11-11 | 上海鸿维物联网技术工程有限公司 | Safety perception of multi -parameter kitchen and shutoff alarm system |
| CN206329752U (en) * | 2016-12-30 | 2017-07-14 | 郴州万墨环保科技有限公司 | A kind of self compensation vacuum valve |
| CN206639347U (en) * | 2017-03-30 | 2017-11-14 | 黄强 | Domestic gas safety automaton |
Non-Patent Citations (1)
| Title |
|---|
| 李安泰: "燃气热水器燃气锥阀的改进与研制", 《机械管理开发》 * |
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| CN113324047B (en) | 2022-12-09 |
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