CN109058543B - Driving method of gas flameout protection valve - Google Patents
Driving method of gas flameout protection valve Download PDFInfo
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- CN109058543B CN109058543B CN201810787800.0A CN201810787800A CN109058543B CN 109058543 B CN109058543 B CN 109058543B CN 201810787800 A CN201810787800 A CN 201810787800A CN 109058543 B CN109058543 B CN 109058543B
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- Prior art keywords
- valve
- electric actuator
- lever
- gas
- passive
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Classifications
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The invention discloses a method for driving a gas flameout protection valve, which is based on the gas flameout protection valve, the gas flameout protection valve comprises a shell, an electromagnetic valve, a passive valve, an electric actuator, an output shaft of the electric actuator and a lever, the electromagnetic valve and the passive valve are arranged in the shell and are in series connection, the state of the closed valve is present before the electric actuator pushes a lever, when the electric actuator drives the lever to jack the electromagnetic valve forward, the passive valve is closed all the time, only after the electric actuator jacks the electromagnetic valve, the lever is driven to a safe way in a reverse direction, the passive valve is pulled open, a gas passage is opened, and gas can be transmitted to a burner to be ignited. The driving method of the gas flameout protection valve solves the problem that in the prior art, gas leakage is caused because the safety valve cannot be normally closed due to abnormal power failure.
Description
Technical Field
The invention relates to the field of gas combustion safety control, in particular to a driving method of a gas flameout protection valve.
Background
At present, the valve with a thermocouple flameout protection device is related to the market, mostly in a manual mode, a user presses down an operating rod of the valve to drive the thermocouple electromagnetic valve to be opened, and presses a movable iron sheet of the electromagnetic valve to the bottom to be attached to a fixed attaching core wound with a coil, at the moment, a circuit supplies current for the coil for a short time, after the hand of the user is released, the movable iron sheet can be temporarily sucked and fixed on an iron core, the valve is kept in an opening state, after gas flowing out of the valve is ignited, the thermocouple is heated, the thermocouple generates power for the fixed iron core, the movable iron sheet is continuously sucked on the fixed iron core, and the flameout protection valve is continuously opened to supply normal combustion of a combustor. If the flame is blown out during the period, the thermocouple loses the current generated by heat, the fixed iron core can not suck the movable iron sheet, the valve can be closed by the spring, in the closed path, because the hand of the user leaves the pressed valve rod, the valve has no any block, the gas can be safely and timely closed and can not be discharged to the atmosphere, but in the manual mode, if the automatic remote control opening is made, or the intelligent product of the touch control glass panel is made, a motor drive is needed to replace the manual mode, but in the process of opening the valve by the motor drive, a risk exists, namely, after the motor pushes the valve open, the push rod can stay on the passage of opening and closing the valve due to the mechanism failure or power failure, so that when the flame is not ignited, the thermocouple can not continuously keep the valve in the open state, when the valve is required to be closed to ensure the safety function, the push rod of the motor for opening the valve stays on the path for closing the valve, so that the function of safety automatic closing is caused, and the big disadvantage that the function of safety automatic closing is completely lost is caused.
In view of the above, it is an urgent need in the market to provide a method for driving a gas cutoff protection valve that solves the problem of gas leakage caused by the plunger of the top valve being blocked by the closed path of the safety valve due to abnormal power failure when the safety valve is opened by the driving of the motor when the motor is used as the automatic driving actuator.
Disclosure of Invention
The invention provides a driving method of a gas flameout protection valve, aiming at the problems in the prior art, and solving the problem of gas leakage caused by the fact that a safety valve cannot be normally closed due to abnormal power failure in the prior art.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a method for driving a gas flameout protection valve is based on the gas flameout protection valve, the gas flameout protection valve comprises a shell, an electromagnetic valve, a passive valve, an electric actuator output shaft and a lever, and the method comprises the following steps:
the electromagnetic valve and the passive valve are arranged in the shell and are in series connection with each other, the state of the valve is closed before the lever is pushed by the electric actuator, when the lever is driven by the electric actuator in the forward direction to jack the electromagnetic valve, the passive valve is closed all the time, only after the electromagnetic valve is jacked by the electric actuator, the passive valve is pulled open after the lever is driven in the reverse direction to a safety way, a gas passage is opened, and gas can be conveyed to the combustor to be ignited.
Further, the electromagnetic valve and the passive valve which are in series relation with each other have the same direction of closing the valve and the pressure flow direction of the fuel gas.
Further, the electric actuator can do rotary motion or linear back and forth motion.
Furthermore, when the lever driven by the electric actuator moves forwards, the upper end of the lever firstly supports a forward fixed fulcrum, then the lower end of the lever is used for supporting the flameout protection valve, and when the lever is driven backwards, the lower end of the lever supports a backward fixed fulcrum, and then the upper end of the lever is used for pulling the passive valve open.
Furthermore, the electric actuator and the driven lever are movably connected in a small angle, when the output shaft of the electric actuator is in a rotary state, the output shaft of the electric actuator is in a screw structure, and the driven lever is in a nut internal thread structure and is connected with the screw structure.
Furthermore, the tail end of the output shaft of the electric actuator penetrates into a shaft sleeve of the shell and supports a microswitch arranged outside the shell, when the lever and the output shaft of the electric actuator advance to a dead point, the output shaft retracts to press a contact of the microswitch, and the direction loop of the switch is switched.
Furthermore, a flow-limiting device is arranged at the downstream of the passive valve, two outlets are arranged at the downstream of the flow-limiting device, when the flow-limiting device extends to the position of flow limitation and the flow rate is close to a small flow rate, one outlet can be closed, if the flow rate of the flow-limiting device is reduced, the second outlet is closed, and only a side passage of the minimum flow rate on the shell is reserved for the second outlet.
Compared with the prior art, the invention provides an electric driving method of a gas flameout protection valve, a passive valve is connected in series at the downstream of the electromagnetic valve in the gas flowing direction, when an electric actuator drives a lever to jack the electromagnetic valve forward, the passive valve is closed all the time, only after the electric actuator jacks the electromagnetic valve, the passive valve is pulled open after the lever is driven in reverse to a safe way, and the driving method of the gas flameout protection valve solves the problem that the safety valve cannot be normally closed to cause gas leakage in the prior art because of abnormal power failure.
Drawings
FIG. 1 is a schematic view of an initial valve-closing state of a first embodiment of the gas flame-out protection valve of the present invention;
FIG. 2 is a schematic view showing the displacement of the components of the first embodiment of the gas flame-out protection valve of the invention when the electric actuator is initially pushing the flame-out protection valve open in the forward direction;
FIG. 3 is a schematic view of the displacement of the components of the first embodiment of the gas flame-out protection valve of the present invention when the electric actuator is just pushing the flame-out protection valve open;
fig. 4 is a schematic view of the first embodiment of the gas flameout protection valve according to the present invention, after the electric actuator is attached to the flameout protection valve which is pushed forward, the microswitch is automatically pushed open to switch the electric actuator to move in the reverse direction;
FIG. 5 is a schematic diagram of the displacement of the components of the first embodiment of the gas flameout protection valve according to the present invention when the electric actuator pulls the passive valve away in the reverse direction for the adjustment function;
FIG. 6 is a schematic diagram showing the displacement of the components of the first embodiment of the gas flameout protection valve according to the present invention when the electric actuator is reversely pulled open and the passive valve is adjusted to the minimum fire;
FIG. 7 is a schematic view of a second embodiment of the gas flame-out protection valve of the present invention in an initial closed condition;
FIG. 8 is a schematic view of the second embodiment of the gas flameout protection valve of the present invention showing the displacement of the components when the passive valve is pulled away in the reverse direction by the electric actuator and closed to another burner;
fig. 9 is a schematic diagram showing the displacement of the components of the second embodiment of the gas flameout protection valve according to the present invention when the electric actuator pulls the passive valve back to close the other burner and then adjusts to the minimum fire.
Wherein, the reference numbers:
1 … … casing 2 … … fixed plate
3 … … flame-out protection electromagnetic valve 5 … … forward fulcrum
6 … … back fulcrum 7 … … microswitch
11 … … magnetic-attracted sheet of solenoid valve coil holder 12 … …
13 … … flameout protection valve plug 14 … … ejector rod
21 … … passive valve 22 … … flow restrictor
23 … … passive valve stem 231 … … fixed retaining ring
24 … … spring 31 … … electric actuator
33 … … output rod 41 … … nut
42 … … lever 43 … … lever arm
44 … … lever arm 55 … … outer ring valve plug
81 … … Inlet 82 … … gas outlet (inner ring)
83 … … bypass holes 84 … … outer ring outlet
85 … … external ring valve port
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The invention provides a driving method of a gas flameout protection valve, which is based on the gas flameout protection valve, wherein the gas flameout protection valve comprises a shell, an electromagnetic valve, a passive valve, an electric actuator output shaft and a lever, and the method comprises the following steps:
the electromagnetic valve and the passive valve are arranged in the shell and are in series connection with each other, the state of the valve is closed before the lever is pushed by the electric actuator, when the lever is driven by the electric actuator in a forward direction to jack the electromagnetic valve, the passive valve is closed all the time, only after the electromagnetic valve is jacked by the electric actuator, the passive valve is pulled open after the lever is driven in a reverse direction to a safety way, a gas passage is opened, and gas can be conveyed to the combustor to be ignited.
The electromagnetic valve and the passive valve which are mutually connected in series have the same direction of the closed valve and the pressure flowing direction of the fuel gas.
Wherein the electric actuator can do rotary motion or linear reciprocating motion.
When the lever is driven to move forward, the upper end of the lever firstly supports a forward fixed fulcrum, then the lower end of the lever is used for supporting the flameout protection valve, and when the lever is driven to move back reversely, the lower end of the lever supports a backward fixed fulcrum, and then the upper end of the lever is used for pulling the passive valve.
The electric actuator and the driven lever are connected movably in a small angle, when the output shaft of the electric actuator is in a rotary state, the output shaft of the electric actuator is in a screw structure, and the driven lever is in a nut internal thread structure and is connected with the screw structure.
The tail end of the output shaft of the electric actuator penetrates into a shaft sleeve of the shell and supports a microswitch arranged outside the shell, and when the lever and the output shaft of the electric actuator advance to a dead point, the output shaft retracts to press a contact of the microswitch so as to switch a switch direction loop.
Wherein a flow restriction device is disposed downstream of the passive valve, two outlets are disposed downstream of the flow restriction device, and when the flow restriction device is extended to close a very small flow at the position of flow restriction, one of the outlets is closed, e.g., the second outlet is closed after the flow restriction device is further reduced, and only a minimum flow is left on the housing to pass to the second outlet.
The present invention will be described in detail with reference to examples.
Referring to fig. 1 to 6, in the first embodiment of the gas flameout protection valve based on the driving method of the gas flameout protection valve of the present invention, in this embodiment, referring to fig. 1, an electric actuator 31 is disposed at one side of a housing 1, an electromagnetic valve 3 is disposed in a gas inlet chamber 81 of the housing 1, a valve plug 13 of the electromagnetic valve 3 seals a first valve port leading to a downstream end in a pneumatic direction, a passive valve 21 is disposed at a second valve port leading to a gas outlet 82 at a downstream end, and seals the second valve port in the pneumatic direction, and a lever 42 is driven by an output rod 33 of the electric actuator 31 to perform a forward (right) displacement to push the flameout protection valve plug 13 open or a reverse (left) opening of the passive valve 21 open the second valve.
Referring to fig. 2, the relative relationship between the lever driven by the electric actuator 31, the solenoid valve 3 disposed at the first port, and the second passive valve 21 will be described. When the lever 42 is pushed to the right by the electric actuator 31, one end 44 of the lever first touches the fulcrum 5 of the housing 1, the lever 42 is inclined in the forward direction, and presses the electromagnetic valve with the force arm 43 to open the valve plug 13 until the magnetic sheet 12 of the electromagnetic valve is pressed against the seat surface of the coil of the electromagnetic valve and is absorbed.
Referring to FIG. 3, at this time, the lever 42 only compresses the spring 24 on the passive valve 21, and the second valve port is still closed, so that if the electric valve is accidentally stuck or loses power, the lever 42 cannot return to the original first valve closing position, and the second passive valve 21 can close the valve instead of the first one, so as not to generate gas leakage.
Referring to fig. 4, when the lever is pushed to the dead point by the electric actuator, the output shaft 33 of the actuator will contract a gap to change the contact point of a micro switch contacted with the tail end of the lever, which can switch the forward power supply of the electric actuator to the reverse power supply, the electric actuator will perform reverse displacement to make the lever 42 return to the left and reverse direction until one end 43 of the lever 42 touches the other reverse fulcrum 6 of the housing, and then the lever 42 will be in a reverse inclined state to pull the passive valve plug 21 to open the second valve gate, so that the gas can be delivered to the burner to be ignited.
Referring to fig. 5 and fig. 6, when the electric actuator wants to adjust the passive valve 21 to the minimum amount of the burner according to the user's demand signal, the passive valve is continuously pulled away until the flow limiting device 22 closes the third valve port, and at this time, the gas can only pass through the minimum flow hole of the bypass hole 83 defined in the housing 1, so as to ensure that the flame is not extinguished. The bypass design can switch different fuel gases, such as liquefied gas or natural gas, on the shell without replacing and discarding the whole valve body.
In addition, the output shaft 33 of the electric actuator can be made into a rotating shaft mode or a linear moving shaft mode, if it is a rotating shaft, the connection with the lever 42 is a screw linkage mode of screw thread and screw cap, and the screw cap of the lever is fixed in a state of being able to be rotated in a small angle.
Fig. 7 to 9 show a second embodiment of the flame-out protection solenoid valve of the present invention.
Referring to FIG. 7, to illustrate the best usage of the present invention, in order to meet the requirement of the common Chinese food cooking, there are two kinds of burners of inner and outer rings to be used for the outer ring big fire stir-frying and only the inner ring small fire stewing, the downstream end of the passive valve 21 of the present invention is connected to a gas outlet to the outer ring burner, and to the end of the flow-limiting device 22 of the passive valve rod 21, a variable outer ring valve plug 55 is connected, when the passive valve 21 is opened by the lever, the flow to the burner port 82 and the outer ring outlet 84 are synchronous.
Referring again to fig. 8, when the passive valve is pulled to a predetermined stroke, the outer ring valve plug 55 is plugged into the valve outlet 85 of the outer ring to close the outer ring burner, and only the gas flowing to the inner ring is left.
Referring to fig. 9, if the user still feels the fire power of the inner ring too high, the passive valve can be pulled open again, and at this time, although the valve plug 55 seals the valve, the rod is displaced leftwards again to compress the spring behind the valve plug 55, so that the rod is displaced leftwards continuously until the flow-limiting device seals the outlet of the inner ring, and only the minimum flow rate of the bypass hole 83 provided on the housing is remained to flow to the outlet of the inner ring, so as to serve as the special cooking requirement for stewing soup for a long time.
In view of the above, the present invention provides an electric driving method of a safety protection solenoid valve using a thermocouple as flame detection, wherein when a motor is used as an automatic driving actuator, a passive valve is provided before the safety valve is pushed open by the electric actuator, the passage to the burner is always closed in the passage connected in series, and the passive valve is opened only after the motor is driven in reverse direction and leaves the passage closed by the safety valve, so that the gas is delivered to the burner and ignited. And furthermore, the multi-functional method for adjusting firepower in multiple sections and switching two burners in different cooking modes is further solved. The above method solves the problem of gas leakage caused by abnormal power failure or mechanism failure when the motor is used as the automatic driving actuator, which stops the push rod of the top-open valve halfway and blocks the path of the safety valve to close the valve when no flame is sensed by the safety valve.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A driving method of a gas flameout protection valve is based on the gas flameout protection valve, the gas flameout protection valve comprises a shell, an electromagnetic valve, a passive valve, an electric actuator output shaft and a lever, and the method is characterized by comprising the following steps:
the electromagnetic valve and the passive valve are arranged in the shell and are in series connection with each other, the state of the valve is closed before the lever is pushed by the electric actuator, when the lever is driven by the electric actuator in the forward direction to jack the electromagnetic valve, the passive valve is closed all the time, only after the electromagnetic valve is jacked by the electric actuator, the passive valve is pulled open after the lever is driven in the reverse direction to a safety way, a gas passage is opened, and gas can be conveyed to the combustor to be ignited.
2. The method as claimed in claim 1, wherein the direction of the closing valve of the solenoid valve and the passive valve in series relation to each other is the same as the pressure flow direction of the gas.
3. The method for driving a gas flameout protection valve as claimed in claim 1, wherein the electric actuator is capable of performing a rotational motion or a linear motion back and forth.
4. The method as claimed in claim 1, wherein the lever driven by the electric actuator is moved forward to have an upper end supporting a forward fixed fulcrum and a lower end opening the flameout protection valve, and is moved backward to have a lower end supporting a backward fixed fulcrum and an upper end opening the passive valve.
5. The method as claimed in claim 1, wherein the electric actuator is movably coupled to the driven lever at a small angle, when the output shaft of the electric actuator is in a rotating state, the output shaft of the electric actuator is in a screw structure, and the driven lever is in a nut screw structure and coupled thereto.
6. The method as claimed in claim 1, wherein the tail end of the output shaft of the electric actuator penetrates into a shaft sleeve of the housing and supports a micro switch disposed outside the housing, and when the lever and the output shaft of the electric actuator advance to a dead point, the output shaft retracts to press a contact of the micro switch, thereby switching a direction loop of the switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787800.0A CN109058543B (en) | 2018-07-18 | 2018-07-18 | Driving method of gas flameout protection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787800.0A CN109058543B (en) | 2018-07-18 | 2018-07-18 | Driving method of gas flameout protection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109058543A CN109058543A (en) | 2018-12-21 |
| CN109058543B true CN109058543B (en) | 2019-12-27 |
Family
ID=64817063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810787800.0A Expired - Fee Related CN109058543B (en) | 2018-07-18 | 2018-07-18 | Driving method of gas flameout protection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109058543B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2534476Y (en) * | 2002-04-28 | 2003-02-05 | 何青松 | Flame-out protective device for energy-saving gas stove |
| CN1508477A (en) * | 2002-08-23 | 2004-06-30 | 珉 张 | Gas safety vavle for complete kitchen |
| KR20050049811A (en) * | 2003-11-24 | 2005-05-27 | 한라정밀 주식회사 | Gas automatic interception equipment |
| CN201187815Y (en) * | 2008-04-03 | 2009-01-28 | 中山市聚德燃气阀门有限公司 | Lever type flameout protection gas valve for gas stove |
| CN205559847U (en) * | 2016-01-26 | 2016-09-07 | 宁波方太厨具有限公司 | Gas -cooker flow control valve |
-
2018
- 2018-07-18 CN CN201810787800.0A patent/CN109058543B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN109058543A (en) | 2018-12-21 |
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Granted publication date: 20191227 |