CN220354482U - Full-premix self-adaptive gas valve - Google Patents

Abstract

The utility model discloses a full-premix self-adaptive gas valve, which comprises a shell, wherein a first cavity, a second cavity, a third cavity and a fourth cavity which are sequentially communicated are arranged in the shell, a first switch valve, a second switch valve, a third switch valve, a regulating valve, a servo diaphragm and a servo valve are arranged in the shell, the first switch valve is arranged between the first cavity and the second cavity, a fifth cavity is arranged at the inner periphery of the shell, a pressure regulating film is arranged in the shell, the pressure regulating film is arranged between the third cavity and the fifth cavity, a first channel is communicated between the second cavity and the fifth cavity, a first pressure regulating cavity is arranged in the shell, the second switch valve is arranged between the first pressure regulating cavity and the second cavity, one end of the third switch valve is arranged between the second cavity and the third cavity, the other end of the third switch valve is in butt joint with the pressure regulating film, the regulating valve is arranged between the third cavity and the fourth cavity, a second pressure regulating cavity is formed between the servo diaphragm and the servo valve, and the servo valve can move relatively to realize the regulation of gas/air ratio.

Description

Full-premix self-adaptive gas valve

Technical Field

The utility model is used in the technical field of gas valves, and particularly relates to a full-premix self-adaptive gas valve.

Background

Because the climate difference of different areas is huge, the supply quality of natural gas is uneven, the varieties are more, the factors can influence the performances of the full premix condensing furnace such as combustion emission, ignition and the like, a certain fault rate and potential safety hazards exist for the operation of the full premix condensing furnace, the use experience and effect of users are influenced, the wide popularization of the green energy-saving product is hindered, the self-adaptive technology is one of technical paths for solving the problems, the full premix gas/air proportional valve used in the market at present is a manual full premix gas/air proportional valve, the manual is based on the open-loop control principle, the problem that the same valve cannot be used for adapting to the use requirements of all areas of the country exists, the current situation that the change range of the gas quality is smaller, and the difference of the gas quality and the gas heat value of the same model for different areas cannot be realized is applicable; when the wall-mounted boiler or the water heater of the traditional full-premix gas/air proportional valve is used, a professional technical worker needs to go on the door according to the conditions of gas quality, heat value and the like of the gas used by a client when the client installs the whole boiler, and a professional smoke analyzer is used for debugging the zero point of the full-premix gas/air proportional valve and proper air-gas proportion, so that the installation and maintenance cost is high, and the labor cost is high.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art and provides a full-premix self-adaptive gas valve which can readjust the ratio of gas to air.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a full premix self-adaptation gas valve, includes the casing, be equipped with first cavity, second cavity, third cavity and the fourth cavity of intercommunication in proper order in the casing, be equipped with first switch valve, second switch valve, third switch valve and governing valve in the casing, first switch valve is established first cavity with between the second cavity, the casing week is being close to one side of third cavity is equipped with the fifth cavity, be equipped with the pressure regulating membrane in the casing, the pressure regulating membrane with form between the casing inner wall the fifth cavity, the pressure regulating membrane is located between the third cavity with between the fifth cavity, the second cavity with the intercommunication has first passageway between the fifth cavity, be equipped with first pressure regulating cavity in the casing, first pressure regulating cavity with second cavity intercommunication, the second switch valve is established first pressure regulating cavity with second cavity is being close to one end, second pressure regulating membrane and second pressure regulating membrane, second pressure regulating membrane and second servo cavity are equipped with second pressure regulating cavity, second pressure regulating membrane and second servo cavity are equipped with the second servo cavity, second pressure regulating membrane and second servo cavity are in order, the second servo cavity is in between the second pressure regulating cavity and the second servo cavity.

Preferably, the first switch valve comprises a first moving iron core and a first servo coil arranged outside the first moving iron core, the first servo coil is embedded into the top of the shell, and a first blocking component for blocking a passage between the first cavity and the second cavity is arranged at the bottom of the first moving iron core.

Preferably, the first blocking member comprises a rubber flap for sealing, and a first spring is arranged between the first blocking member and the inner wall of the shell.

Preferably, the second switch valve comprises a second moving iron core and a second servo coil arranged outside the second moving iron core, the second servo coil is embedded into the top of the shell, a second blocking component for blocking a passage between the first passage and the second cavity is arranged at the bottom of the second moving iron core, and a second spring is arranged between the second moving iron core and the shell.

Preferably, the third switching valve comprises a pressure regulating rod and a third blocking member, the bottom end of the pressure regulating rod is in butt joint with the pressure regulating membrane, the third blocking member is arranged at the top end of the pressure regulating rod to block a passage between the second cavity and the third cavity, a third spring is arranged between the pressure regulating rod and the outer wall of the third cavity, and the third blocking member is hemispherical.

Preferably, the regulating valve comprises a supporting component and a transmission component, wherein the supporting component and the transmission component are arranged on a passage between the third cavity and the fourth cavity, the cross section size of the supporting component is gradually reduced from the proximal end to the distal end, the distal end of the supporting component is provided with a through hole matched with the distal end of the transmission component, the proximal end of the transmission component is provided with a chuck, the periphery of the transmission component is provided with a fourth spring, and the fourth spring is positioned between the chuck and the supporting component.

Preferably, the shell is provided with a first stepping motor for driving the transmission part to rotate, the first stepping motor comprises a telescopic shaft, and the telescopic shaft is connected with the chuck through a connecting rod.

Preferably, the shell is provided with an air inlet communicated with the first cavity and an air outlet communicated with the fourth cavity, a third channel is arranged between the second pressure regulating cavity and the fourth cavity, and the third channel is communicated with the fourth cavity.

Preferably, the servo diaphragm and the servo valve are both arranged along the horizontal direction, and the shell is provided with a second stepping motor for driving the servo diaphragm to move along the height direction.

Preferably, the servo diaphragm and the servo valve are both arranged at the top of the shell, the third cavity is positioned at the bottom of the second cavity, and the fifth cavity is arranged at the bottom of the third cavity.

One of the above technical solutions has at least one of the following advantages or beneficial effects: the full-premixing self-adaptive gas valve can move relatively to the servo diaphragm through the servo valve, when gas enters the inner cavity from the first inner cavity, part of gas in the inner cavity enters the fifth cavity through the first pressure regulating cavity and the first channel, the gas in the fifth cavity generates upward thrust to the pressure regulating film due to the gas pressure, the third switching valve is pushed to move, so that the second cavity and the third cavity are communicated, the gas in the second cavity enters the third cavity, the gas in the third cavity enters the fourth cavity under the regulation action of the regulating valve to realize the regulation of the gas flow, the gas entering the fifth cavity enters the second pressure regulating cavity and the fourth cavity through the second channel, the part of gas is a control gas path, the gas flow is extremely small, the gas flow of other channels is not influenced, the size of the second pressure regulating cavity is regulated through the relative motion of the servo valve and the servo diaphragm, the motion opening of the third switch valve is reversely regulated, if the air or gas quality in the fully premixed self-adaptive gas valve is changed, the ratio of gas/air can be readjusted through controlling the distance between the servo valve and the servo diaphragm, the combustion working condition of the fully premixed self-adaptive gas valve is restored to the optimal state, the purpose of regulating the perceived environment change is achieved, the fully premixed self-adaptive gas valve can regulate the ratio of air/gas, the air surplus coefficient is ensured to be stable or unchanged, the pollutant emission is stabilized, the high combustion efficiency is ensured, the energy is saved, and the use comfort of customers is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a cross-sectional view of one embodiment of the present utility model.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the present utility model, if directions (up, down, left, right, front and rear) are described, they are merely for convenience of description of the technical solution of the present utility model, and do not indicate or imply that the technical features must be in a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, "a plurality of" means one or more, and "a plurality of" means two or more, and "greater than", "less than", "exceeding", etc. are understood to not include the present number; "above", "below", "within" and the like are understood to include this number. In the description of the present utility model, the description of "first" and "second" if any is used solely for the purpose of distinguishing between technical features and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the present utility model, unless clearly defined otherwise, terms such as "disposed," "mounted," "connected," and the like should be construed broadly and may be connected directly or indirectly through an intermediate medium, for example; the connecting device can be fixedly connected, detachably connected and integrally formed; can be mechanically connected, electrically connected or capable of communicating with each other; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

In which fig. 1 shows a reference direction coordinate system of an embodiment of the present utility model, and the embodiment of the present utility model is described below with reference to the directions shown in fig. 1.

The full premix combustion technology can effectively control the emission of NOx and CO in the flue gas, is a green technology which accords with the trend of double carbon and has high energy efficiency and low energy consumption, so the energy-saving and emission-reducing product is a trend, the full premix condensing type wall-mounted furnace is used, clean energy natural gas is used, and the heat efficiency is high. The structure is that air and gas are premixed according to a set proportion and then enter a combustion chamber of the gas appliance for combustion. Compared with the traditional atmospheric combustion technology, the carbon monoxide and the nitrogen oxide generated by combustion have the advantages of less emission and high combustion heat efficiency, and the proportional valve for controlling the pre-mixing of the fuel gas and the air in a proper volume ratio is called a full-premix fuel gas/air proportional valve, and the full-premix combustion technology in the current market is based on the full-premix fuel gas/air proportional valve (fuel gas valve).

The embodiment of the utility model provides a full premix self-adaptive gas valve, referring to fig. 1, which comprises a housing 100, a first cavity 110, a second cavity 120, a third cavity 130 and a fourth cavity 140 which are sequentially communicated are arranged in the housing 100, a first switch valve 200, a second switch valve 300, a third switch valve 400 and a regulating valve 500 are arranged in the housing 100, the first switch valve 200 is arranged between the first cavity 110 and the second cavity 120, a fifth cavity 150 is arranged at one side of the inner periphery of the housing 100 close to the third cavity 130, a pressure regulating film 151 is arranged in the housing 100, a fifth cavity 150 is formed between the pressure regulating film 151 and the inner wall of the housing 100, the pressure regulating film 151 is arranged between the third cavity 130 and the fifth cavity 150, a first channel 160 is communicated between the second cavity 120 and the fifth cavity 150, a first pressure regulating cavity 170 is arranged in the housing 100, the first pressure regulating cavity 170 is communicated with the second cavity 120, the second switch valve 300 is disposed between the first pressure regulating cavity 170 and the second cavity 120, one end of the third switch valve 400 is disposed between the second cavity 120 and the third cavity 130, the other end is in contact with the pressure regulating membrane 151, the regulating valve 500 is disposed between the third cavity 130 and the fourth cavity 140, the servo diaphragm 600 and the servo valve 610 are disposed in the housing 100, a second pressure regulating cavity 620 is formed between the servo diaphragm 600 and the servo valve 610, the second channel 180 is disposed in the housing 100, the second cavity 120, the first pressure regulating cavity 170, the first channel 160, the fifth cavity 150, the second channel 180, and the second pressure regulating cavity 620 are sequentially communicated, the servo valve 610 can move relative to the servo diaphragm 600 to regulate the size of the second pressure regulating cavity 620, so-called "zero point" is the control current/control step of the corresponding control servo valve 610 when the third switch valve 400 is in the critical state of being opened and not opened (as will be understood, when the servo valve 610 is controlled by the servo coil, the zero point is the corresponding control current in the critical state, when the servo valve 610 is controlled by the stepper motor, the zero point is the corresponding control step distance in the critical state, the corresponding control current/control step distance is called as ' zero point current '/' zero point step distance ', and is called as ' zero point ', the change point is the zero point current '/' zero point step distance ', the fully premixed adaptive gas valve can relatively move with the servo diaphragm 600 through the servo valve 610, when gas enters the inner cavity 120 from the first inner cavity 110, part of gas in the inner cavity 120 enters the fifth cavity 150 through the first pressure regulating cavity 170 and the first channel 160, the gas in the fifth cavity 150 generates upward thrust to the pressure regulating film 151 due to the gas pressure, the third switch valve 400 is pushed to move, so that the second cavity 120 and the third cavity 130 are communicated, the gas in the second cavity 120 enters the third cavity 130, the gas in the third cavity 130 enters the fourth cavity 140 under the regulation action of the regulating valve 500 to realize the regulation of the gas flow, wherein the gas entering the fifth cavity 150 enters the second pressure regulating cavity 620 through the second channel 180, the gas flow is extremely small, the gas flow of other channels is not influenced, the size of the second pressure regulating cavity 620 is regulated by the relative movement of the servo valve 610 and the servo diaphragm 600, the movement opening of the third switch valve 400 is reversely regulated, the gas flow of the third cavity 130 is influenced, in the fully premixed self-adaptive gas valve, the air and the gas are mixed according to a set proportion and then burnt, if the air or the gas quality is changed, the proper air and gas ratio will deviate, the combustion condition of the combustion apparatus will change, at this moment can judge whether the combustion is abnormal and the offset of the abnormality automatically according to combustion condition and data analysis, judge good object and correction that need to revise, through controlling the distance between servo valve 610 and servo diaphragm 600, readjust the proportion of gas/air, make its combustion condition resume to the optimal state, achieve the purpose of adjusting to the change of the perception environment, this full premix self-adaptation gas valve can adjust the air/gas ratio, guarantee that the air excess coefficient is stable or invariable, stabilize pollutant discharge, guarantee the high efficiency of combustion, save the energy, improve customer's use comfort, only need simple debugging can when installing on site, do not need professional personnel and flue gas analytical instrument to detect again on site, the cost of installation maintenance is low in efficiency is high, the subsequent maintenance number of times is less, thereby promote the installation maintainer and end consumer to the approval of hanging stove product.

In some embodiments, referring to fig. 1, the first switching valve 200 includes a first moving core 210 and a first servo coil 220 located outside the first moving core 210, the first servo coil 220 is embedded in the top of the housing 100, and a first blocking member 230 for blocking a passage between the first and second chambers 110 and 120 is provided at the bottom of the first moving core 210.

As a preferred embodiment of the present utility model, referring to fig. 1, the first blocking member 230 includes a rubber flap for sealing, a first spring is provided between the first blocking member 230 and the inner wall of the housing 100, and the first servo coil 220 is energized to lift the first moving core 210 upward, and the first blocking member 230 is lifted upward, and the first spring is compressed, and the first chamber 110 and the second chamber 120 are communicated, so that the fuel gas enters the second chamber 120 from the first chamber 110.

In some embodiments, referring to fig. 1, the second switching valve 300 includes a second moving core 310 and a second servo coil 320 positioned outside the second moving core 310, the second servo coil 320 is embedded in the top of the housing 100, a second blocking member 330 for blocking the passage between the first passage 160 and the second chamber 120 is provided at the bottom of the second moving core 310, and a second spring is provided between the second moving core 310 and the housing 100.

In some embodiments, referring to fig. 1, the third switching valve 400 includes a pressure regulating rod 410 and a third blocking member 420, the bottom end of the pressure regulating rod 410 abuts against the pressure regulating membrane 151, the third blocking member 420 is disposed at the top end of the pressure regulating rod 410 to block the passage between the second cavity 120 and the third cavity 130, a third spring is disposed between the pressure regulating rod 410 and the outer wall of the third cavity 130, and the third blocking member 420 is hemispherical.

Preferably, referring to fig. 1, the regulating valve 500 includes a support member 510 provided in a passage between the third chamber 130 and the fourth chamber 140 and a transmission member 520 for regulating a flow rate of gas, the support member 510 having a cross-sectional size gradually decreasing from a proximal end to a distal end, the distal end of the support member 510 being provided with a through hole engaged with the distal end of the transmission member 520, the transmission member 520 being provided at a proximal end with a chuck 530, and a fourth spring being provided at an outer circumference of the transmission member 520, the fourth spring being located between the chuck 530 and the support member 510.

As a preferred embodiment of the present utility model, referring to fig. 1, a first stepping motor 540 for driving the transmission part 520 to rotate is provided on the housing 100, and the first stepping motor 540 includes a telescopic shaft 541, and the telescopic shaft 541 is connected to the chuck 530 through a connection rod, i.e., the adjusting valve 500 is controlled by the first stepping motor 540. In some embodiments, servo coils may also be employed to control the reciprocation of the regulator valve 500.

In some embodiments, referring to fig. 1, an air inlet 111 that is communicated with the first cavity 110 and an air outlet 141 that is communicated with the fourth cavity 140 are disposed on the housing 100, a third channel 190 is disposed between the second pressure regulating cavity 620 and the fourth cavity 140, the third channel 190 is communicated with the fourth cavity 140, and the air in the second channel 180 enters the fourth cavity 140 after entering the second pressure regulating cavity 620, and this part of air passage is a control air passage, and the air flow is extremely small and has no influence on the air flow of other channels.

Preferably, referring to fig. 1, the servo diaphragm 600 and the servo valve 610 are both disposed along a horizontal direction, the housing 100 is provided with a second stepper motor 630 for driving the servo diaphragm 600 to move along a height direction, and in the combustion using the fully premixed adaptive gas/air proportional valve, the controller can automatically change the step pitch of the second stepper motor 630 according to the combustion working condition to find a "zero point", wherein the "zero point" is the "zero point step pitch" corresponding to the third plugging member 420 in the critical state of being opened and not opened; in other embodiments, the servo diaphragm 600 is provided with a third moving core and a third servo coil sleeved outside the third moving core, and in the combustion using the fully premixed adaptive gas/air proportional valve, the controller can automatically change the magnitude of the current in the third servo coil according to the combustion condition to find the "zero point", where the "zero point" is the current of the third servo coil corresponding to the third plugging member 420 in the critical state of being opened and not opened, and this corresponding current is referred to as "zero point current".

As a preferred embodiment of the present utility model, referring to fig. 1, the servo diaphragm 600 and the servo valve are both disposed at the top of the housing 100, the third chamber 130 is disposed at the bottom of the second chamber 120, and the fifth chamber 150 is disposed at the bottom of the third chamber 130.

In the description of the present specification, reference to the terms "example," "embodiment," or "some embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present utility model is, of course, not limited to the above-described embodiments, and one skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the utility model, and these equivalent modifications or substitutions are intended to be included in the scope of the present utility model as defined in the claims.

Claims (10)

1. A full premix self-adaptation gas valve, its characterized in that: the servo valve comprises a shell, a first cavity, a second cavity, a third cavity and a fourth cavity which are sequentially communicated are arranged in the shell, a first switch valve, a second switch valve, a third switch valve and a regulating valve are arranged in the shell, the first switch valve is arranged between the first cavity and the second cavity, a fifth cavity is arranged on one side, close to the third cavity, of the inner periphery of the shell, a pressure regulating membrane is arranged in the shell, the fifth cavity is formed between the pressure regulating membrane and the inner wall of the shell, the pressure regulating membrane is positioned between the third cavity and the fifth cavity, a first channel is communicated between the second cavity and the fifth cavity, a first pressure regulating cavity is arranged in the shell, the first pressure regulating cavity is communicated with the second cavity, the second switch valve is arranged between the first pressure regulating cavity and the second cavity, one end of the third switch valve is arranged between the second cavity and the second cavity, a servo valve is arranged between the second cavity and the second cavity, the second pressure regulating membrane is connected with the second channel, the servo valve is arranged between the second cavity and the second cavity, the servo valve is communicated with the servo channel, and the servo valve is arranged between the servo cavity and the second cavity, and the servo valve is sequentially communicated with the servo channel.

2. The fully premixed adaptive gas valve according to claim 1, wherein: the first switch valve comprises a first moving iron core and a first servo coil arranged outside the first moving iron core, the first servo coil is embedded into the top of the shell, and a first blocking component for blocking a passage between the first cavity and the second cavity is arranged at the bottom of the first moving iron core.

3. The fully premixed adaptive gas valve according to claim 2, wherein: the first blocking part comprises a rubber flapper for sealing, and a first spring is arranged between the first blocking part and the inner wall of the shell.

4. The fully premixed adaptive gas valve according to claim 1, wherein: the second switch valve comprises a second moving iron core and a second servo coil arranged outside the second moving iron core, the second servo coil is embedded into the top of the shell, a second blocking component used for blocking a passage between the first passage and the second cavity is arranged at the bottom of the second moving iron core, and a second spring is arranged between the second moving iron core and the shell.

5. The fully premixed adaptive gas valve according to claim 1, wherein: the third switching valve comprises a pressure regulating rod and a third blocking part, the bottom end of the pressure regulating rod is in butt joint with the pressure regulating membrane, the third blocking part is arranged at the top end of the pressure regulating rod to block a passage between the second cavity and the third cavity, a third spring is arranged between the pressure regulating rod and the outer wall of the third cavity, and the third blocking part is hemispherical.

6. The fully premixed adaptive gas valve according to claim 1, wherein: the regulating valve comprises a supporting component and a transmission component, wherein the supporting component is arranged on a passage between the third cavity and the fourth cavity, the section size of the supporting component is gradually reduced from the proximal end to the distal end, a through hole matched with the distal end of the transmission component is formed in the distal end of the supporting component, a chuck is arranged at the proximal end of the transmission component, a fourth spring is arranged on the periphery of the transmission component, and the fourth spring is located between the chuck and the supporting component.

7. The fully premixed adaptive gas valve according to claim 6, wherein: the shell is provided with a first stepping motor for driving the transmission part to rotate, the first stepping motor comprises a telescopic shaft, and the telescopic shaft is connected with the chuck through a connecting rod.

8. The fully premixed adaptive gas valve according to claim 1, wherein: the shell is provided with an air inlet communicated with the first cavity and an air outlet communicated with the fourth cavity, a third channel is arranged between the second pressure regulating cavity and the fourth cavity, and the third channel is communicated with the fourth cavity.

9. The fully premixed adaptive gas valve according to claim 1, wherein: the servo diaphragm and the servo valve are arranged along the horizontal direction, and the shell is provided with a second stepping motor for driving the servo diaphragm to move along the height direction.

10. The fully premixed adaptive gas valve according to claim 9, wherein: the servo diaphragm and the servo valve are both arranged at the top of the shell, the third cavity is arranged at the bottom of the second cavity, and the fifth cavity is arranged at the bottom of the third cavity.