CN103791131B - A kind of self-adapting type gas pressure-reducing valve - Google Patents
A kind of self-adapting type gas pressure-reducing valve Download PDFInfo
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- CN103791131B CN103791131B CN201410045441.3A CN201410045441A CN103791131B CN 103791131 B CN103791131 B CN 103791131B CN 201410045441 A CN201410045441 A CN 201410045441A CN 103791131 B CN103791131 B CN 103791131B
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- gas
- low heat
- fuel gas
- high heating
- heat value
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
Disclosure one self-adapting type gas pressure-reducing valve, including: a gas pressure-reducing valve, it includes a valve body, and described valve body is provided with gas inlet and gas outlet, described gas inlet and described gas outlet by being located at the blast tube connection of valve inner; One premix chamber, it includes a shell, and described enclosure is provided with a cavity, and described shell is provided with air inlet, being additionally provided with a premix chamber gas inlet and a premix chamber gas outlet on described shell, described premix chamber gas inlet is sheathed on described gas outlet end. Due to the fact that and be provided with a premix chamber, therefore can ensure that in air relief valve combustion gas out can fully be burnt, and simple in construction, easy to use.
Description
Technical field
The present invention relates to a kind of air relief valve, more precisely a kind of self-adapting type gas pressure-reducing valve.
Background technology
The air relief valve of prior art, simply simple containing air relief valve, owing to fuel gas buring is also required to air, therefore the gas pressure-reducing valve of prior art fuel gas buring out is insufficient.
Summary of the invention
Due to the problems referred to above of prior art, the present invention proposes a kind of self adaptation gas pressure-reducing valve, and it can effectively solve the problems referred to above of prior art.
The present invention solves the problems referred to above by the following technical programs:
A kind of self-adapting type gas pressure-reducing valve, including:
One gas pressure-reducing valve, it includes a valve body, and described valve body is provided with gas inlet and gas outlet, described gas inlet and described gas outlet by being located at the blast tube connection of valve inner;
One premix chamber, it includes a shell, and described enclosure is provided with a cavity, and described shell is provided with air inlet, being additionally provided with a premix chamber gas inlet and a premix chamber gas outlet on described shell, described premix chamber gas inlet is sheathed on described gas outlet end.
Described gas inlet includes a high heating value gas inlet and a fuel gas with low heat value air inlet; Described gas outlet includes a high heating value gas inlet and a fuel gas with low heat value gas outlet; Described blast tube includes the high heating value blast tube and the fuel gas with low heat value passage that communicate; Described high heating value gas inlet connects with described high heating value gas outlet and described fuel gas with low heat value gas outlet respectively through described high heating value blast tube and described fuel gas with low heat value passage, and described fuel gas with low heat value air inlet connects with described fuel gas with low heat value gas outlet and described high heating value gas outlet respectively through described fuel gas with low heat value passage and described high heating value blast tube.
Described air inlet includes one first air inlet and one second air inlet.
Also including one first push rod, it is located in described fuel gas with low heat value passage, and described first push rod can move upward described fuel gas with low heat value gas outlet seal.
Also including one first jacking block, itself and described first push rod abut against, and described fuel gas with low heat value air inlet is sealed by described first jacking block, and described first jacking block can move upward and drive described first push rod to move upward.
Also include a nozzle mounting seat, and described nozzle mounting seat can move upward and is sealed by described second air inlet.
Also including one second push rod, described second push rod is located at inside described high heating value blast tube, and described second push rod abuts against with described nozzle mounting seat, and described second push rod can drive described nozzle mounting seat to move upward.
Also including one second jacking block, itself and described second push rod abut against, and described high heating value gas inlet is sealed by described second jacking block, and described second jacking block can move upward and drive described second push rod to move upward.
Also include the high heating value gas stabilized-pressure structure and the fuel gas with low heat value structure of voltage regulation that are respectively arranged in described high heating value blast tube and described fuel gas with low heat value passage.
The invention have the advantages that and due to the fact that and be provided with a premix chamber, therefore can ensure that in air relief valve combustion gas out can fully be burnt, and simple in construction, easy to use.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is structure second schematic diagram of the present invention.
Fig. 3 be the present invention look up structural representation.
Fig. 4 is the plan structure schematic diagram of the present invention.
Fig. 5 is the generalized section in Fig. 3 along D-D.
Fig. 6 is the generalized section in Fig. 4 along A-A.
Fig. 7 is the structural representation of Fig. 5 after access high heating value combustion gas.
Fig. 8 is the front side structure schematic diagram after the present invention accesses high heating value combustion gas.
Fig. 9 is the rear structure schematic diagram after the present invention accesses high heating value combustion gas.
Figure 10 is the structural representation of Fig. 5 after access fuel gas with low heat value.
Figure 11 is the front side structure schematic diagram after the present invention accesses fuel gas with low heat value.
Figure 12 is the rear structure schematic diagram after the present invention accesses fuel gas with low heat value.
Figure 13 is second structural representation of the present invention.
Figure 14 is the partial enlargement structural representation of the present invention.
Figure 15 is the structural representation of the fuel gas with low heat value of the fuel gas with low heat value interface access normal pressure of the present invention.
Figure 16 is the structural representation of the fuel gas with low heat value interface access high heating value combustion gas of the present invention.
The fuel gas with low heat value interface that Figure 17 is the present invention accesses the structural representation after adjusting more than the fuel gas with low heat value of normal pressure.
Detailed description of the invention:
Below in conjunction with detailed description of the invention, the present invention is described in detail.
As shown in Figures 1 to 4, disclosure one self-adapting type gas pressure-reducing valve, including: gas pressure-reducing valve 1 and a premix chamber 2. Gas joint is connected in gas pressure-reducing valve, and combustion gas is sent to premix chamber after processing inside gas pressure-reducing valve, mixes with air in premix chamber.
The premix chamber of the present invention includes a shell 201, described enclosure is provided with a cavity 202, and described shell is provided with air inlet, being additionally provided with premix chamber gas outlet 203 and a premix chamber gas inlet 204 on described shell, described air inlet includes one first air inlet 204 and one second air inlet 205.
The gas pressure-reducing valve of the present invention includes a valve body, described valve body is provided with gas inlet and gas outlet, described gas inlet and described gas outlet are by being located at the blast tube connection of valve inner, and described premix chamber gas inlet is sheathed on described gas outlet end. In the present invention, gas inlet includes high heating value gas inlet 1011 and a fuel gas with low heat value air inlet 1021; Described gas outlet includes a high heating value gas outlet and a fuel gas with low heat value gas outlet;High heating value gas inlet 1011 and fuel gas with low heat value air inlet 1021 inlet port place are respectively equipped with one first jacking block and one second jacking block, the first jacking block and the second jacking block will seal in high heating value gas inlet and fuel gas with low heat value air inlet respectively. Described blast tube includes high heating value blast tube 1014 and the fuel gas with low heat value passage 1024 communicated; Described high heating value gas inlet connects with described high heating value gas outlet and described fuel gas with low heat value gas outlet respectively through described high heating value blast tube and described fuel gas with low heat value passage, and described fuel gas with low heat value air inlet connects with described fuel gas with low heat value gas outlet and described high heating value gas outlet respectively through described fuel gas with low heat value passage and described high heating value blast tube. Being additionally provided with one first push rod 1013 inside fuel gas with low heat value passage and high heating value blast tube respectively, the first push rod can move upward described fuel gas with low heat value gas outlet seal; Fuel gas with low heat value gas outlet place is provided with a nozzle mounting seat 1024, and described nozzle mounting seat can move upward and is sealed by described second air inlet.
The first jacking block and the first push rod that fuel gas with low heat value channel interior is provided with abut against, and the first jacking block can move upward and drive described first push rod to move upward.
One second push rod 1023 it is provided with inside high heating value blast tube, described second push rod one end and described nozzle mounting seat abut against, the other end and the one or two jacking block of described second push rod offset, described second jacking block drives the second push rod to move upward, thus the second push rod can drive described nozzle mounting seat to move upward, thus the second air inlet is sealed.
Present invention additionally comprises high heating value gas stabilized-pressure structure 107 and the fuel gas with low heat value structure of voltage regulation 108 being respectively arranged in described high heating value blast tube and described fuel gas with low heat value passage. described high heating value gas stabilized-pressure structure includes pressure regulation epithelium 1071, pressure spring 1072, valve gap 1073 and regulator bolts 1074 and forms, pressure regulation epithelium is provided with a pressure regulation bolt 1076,, pressure regulation bolt on pressure regulation epithelium with pressure regulation bolt is arranged in this high heating value blast tube, pressure regulation epithelium 1071 is fitted between valve body and valve gap 1073, pressure spring 1072 is sleeved in the mounting seat 1075 on valve gap 1073, one end of pressure spring 1072 and pressure regulation epithelium 1071 offset, and the other end and spinning regulator bolts 1074 in mounting seat 1075 offset. described fuel gas with low heat value relief valve component 108 is by the pressure regulation epithelium 1081 with pressure regulation bolt, pressure spring 1082, valve gap 1083 and regulator bolts 1084 form, pressure regulation epithelium is provided with a pressure regulation bolt 1086, pressure regulation bolt on pressure regulation epithelium 1071 with pressure regulation bolt is arranged in this fuel gas with low heat value passage, pressure regulation epithelium 1081 is fitted between valve body and valve gap 1083, pressure spring 1082 is sleeved in the mounting seat 1085 on valve gap 1083, one end of pressure spring 1082 and pressure regulation epithelium 1081 offset, the other end and spinning regulator bolts 1084 in mounting seat 1085 offset.
Fuel gas with low heat value gas outlet and fuel gas with low heat value gas outlet in the present invention are respectively equipped with fuel gas with low heat value nozzle 1014 and a high heating value gas nozzle 1024, then combustion gas enters from high heating value air inlet and fuel gas with low heat value air inlet respectively flows out from high heating value gas nozzle and fuel gas with low heat value nozzle respectively, and enters in premix chamber.
Be respectively equipped with between the first jacking block and the second jacking block and valve body in the present invention one first spring 1012 and and the second spring 1022, the both sides of the first spring are spacing respectively through the first jacking block and valve body, and the both sides of the second spring are spacing respectively through the second jacking block and valve body.When fuel gas with low heat value air inlet connects and during fuel gas with low heat value, fuel gas with low heat value joint is linked in fuel gas with low heat value air inlet, fuel gas with low heat value joint and the first jacking block abut against and drive the first jacking block to move upward, now the first spring is in compressive state, when fuel gas with low heat value joint takes out from fuel gas with low heat value air inlet is internal, first spring resets under the effect of elastic force, drives the first jacking block to reset simultaneously, is sealed by fuel gas with low heat value air inlet; When high heating value gas inlet connects and during high heating value combustion gas, high heating value gas joint is linked in high heating value gas inlet, high heating value gas joint and the second jacking block abut against and drive the second jacking block to move upward, now the second spring is in compressive state, when high heating value gas joint takes out from high heating value gas inlet is internal, second spring resets under the effect of elastic force, drives the second jacking block to reset simultaneously, is sealed by high heating value gas inlet.
The present invention is additionally provided with between the first push rod and valve body one the 3rd spring 1017, first push rod moves upward under the drive of the first jacking block, simultaneously by the 3rd spring-compressed, after the outside that the first jacking block is subject to disappears, the 3rd spring reset also drives the first push rod to reset.
One the 4th spring it is provided with between nozzle mounting seat and valve body in the present invention, second push rod drives nozzle mounting seat to move upward under the effect of external force, simultaneously compression the 4th spring, when after the external force disappearance that the second push rod is subject to, 4th spring reset, and drive nozzle mounting seat to reset.
High heating value gas nozzle, fuel gas with low heat value nozzle, the first jacking block, the second jacking block, the first push rod in the present invention, between the second push rod and nozzle mounting seat and valve body, it is equipped with sealing ring 110, can ensure to seal between itself and valve body by this sealing ring, it is prevented that gas leakage.
The present invention is additionally provided with a safety ignitor pipe air inlet 1051 and connected high heating value gas outlet 1052 and a low heat value safety ignitor gas outlet 1053.
Present invention additionally comprises gas inlet 1061 and a gas outlet 1062.
Present invention additionally comprises a safety ignitor stop valve 103, fuel gas with low heat value passage can be cut off by described safety ignitor stop valve after fuel gas with low heat value passage accesses high heating value combustion gas, and by described fuel gas with low heat value channel conductive after described fuel gas with low heat value passage accesses fuel gas with low heat value. In the present invention, safety ignitor stop valve includes epithelium 1031, control chamber 1032, controls passage 1033, seal bar 1034, sealing ring 1035 and spring 1036, spring 1036 is sheathed on the outside of seal bar 1034, and the two ends of spring abut against spacing with epithelium 1031 and described valve body respectively. Seal bar one end is provided with sealing ring 1035, and sealing ring is located in high heating value blast tube, and high heating value blast tube can be sealed and disconnect by seal bar, and one end of spring is sheathed on the outside of sealing ring. The right side of epithelium is located in control chamber 1032, and seal bar is led to fuel gas with low heat value safety ignitor decompression admittance by a control passage 1033.
Invention additionally discloses a regulation device 111, it can by described fuel gas with low heat value channel conductive, described control device includes control passage 1111 and an adjusting nut 1112, described control channel interior is located at by described adjusting nut, and described control nut can regulate described control passage and described fuel gas with low heat value channel conductive and disconnection, the fuel gas with low heat value channel conductive of the front end of described control passage and described sealing ring front end.
The operation principle of the present invention is:
When accessing high heating value combustion gas, first jacking block up moves under the effect of gas kitchen pipe joint, driving the first push rod up to move, logical for high heating value combustion gas Guan Bi, fuel gas with low heat value nozzle flows out without combustion gas, nozzle mounting seat and the 4th spring are in a state of nature, as it is shown in fig. 7, now only one of which nozzle has combustion gas to flow out, premix chamber both sides enter air scoop the first air intlet and the second air inlet enters air simultaneously, ensure that fuel gas with low heat value can fully burn, as shown in Figure 8,9; When accessing fuel gas with low heat value, second jacking block moves upward under the effect of gas joint, drive the second push rod to move upward simultaneously, second push rod drives nozzle mounting seat to move upward, this combustion gas enters from high heating value gas inlet, due to high heating value blast tube and fuel gas with low heat value channel connection, therefore combustion gas flows out in premix chamber from fuel gas with low heat value nozzle and high heating value gas nozzle, as shown in Figure 10, nozzle mounting seat moves upward under the drive of the second push rod, second air inlet port is sealed, as shown in FIG. 11 and 12 simultaneously. Owing to the calorific value of combustion gas is different, so when Same Efficieney, the gas quantity needed for fuel gas with low heat value is big, so when connecing fuel gas with low heat value, it is necessary to two nozzles are given vent to anger simultaneously. The air requirements amount of high heating value combustion gas is big, so when accessing high heating value combustion gas, air is entered in both sides simultaneously.
Such as Figure 13, shown in 14, the left and right sides of the epithelium of safety ignitor stop valve is respectively in high heating value blast tube and fuel gas with low heat value passage, and described high heating value blast tube can be cut off by connection one after described fuel gas with low heat value passage accesses high heating value combustion gas on the left of epithelium 1031, and the seal bar 1034 after fuel gas with low heat value passage accesses fuel gas with low heat value, described high heating value blast tube turned on. The surrounding of epithelium is fixed on valve body, and the fixed edge adnexa of epithelium is provided with one and has elastic bending part, owing to this kink therefore this epithelium has certain elasticity, after the fuel gas with low heat value passage on the left of epithelium accesses high heating value combustion gas, owing to the pressure of high heating value combustion gas is bigger, epithelium can be driven thus driving seal bar, thus fuel gas with low heat value passage is cut off, and after fuel gas with low heat value passage accesses fuel gas with low heat value, owing to the pressure of fuel gas with low heat value is less, therefore epithelium recovers the state that it is original, therefore by fuel gas with low heat value channel conductive. Stability due to supply, the pressure of fuel gas with low heat value may become unstable, and the pressure of fuel gas with low heat value can be close or identical with the pressure of high heating value combustion gas, therefore stablizing due to the pressure of combustion gas after even if fuel gas with low heat value is linked into fuel gas with low heat value nozzle sometimes, it is likely to fuel gas shutoff, now have only to screw out adjusting nut to external rotation, make to control passage and fuel gas with low heat value channel conductive, therefore combustion gas can enter from fuel gas with low heat value air inlet normally and flow out from the main gas outlet of combustion gas, facilitates user normally to use. The using method of the regulation device of the present invention is when accessing normal natural gas, small part of gas is entered by passage one and controls chamber, the pressure now controlling chamber fetters the pressure summation of epithelium less than spring, so epithelium does not move, so the seal bar being connected on epithelium remains stationary, entrance cavity one combustion gas after pressure maintaining valve voltage stabilizing smooth can must be passed through safety ignitor passage and enter safety ignitor gas outlet;When misconnection enters liquefied gas, small part of gas is entered by passage one and controls chamber, the pressure now controlling chamber fetters the pressure summation of epithelium more than spring, so the seal bar that epithelium band is automatically connected on epithelium is moved toward seal bar direction, now blast tube is cut off by seal bar, and entrance cavity one combustion gas after pressure maintaining valve voltage stabilizing can not smoothly enter safety ignitor gas outlet; Now machine cannot be lighted, and serves the effect preventing wrong gas; Owing to the gas pressure of part family is bigger, individual overlapping interval may be had with gas pressure, so when client connects gas time, owing to preventing the effect of wrong device of air, occur or situation about cannot use, in order to solve to access the situation that bigger pressure natural gas machine cannot use, so adding manual adjustments nut, now manual turn manual adjustments nut outward movment, then low heat value passage is switched on, combustion gas was directly entered passway one and was entered safety ignitor gas outlet, and now machine can normally use, as shown in Figure 15,16,17.
As shown in Figure 6, structure of voltage regulation of the present invention, when gaseous-pressure in high heating value blast tube is bigger, combustion gas drives moving upward of pressure regulation epithelium and pressure spring, pressure regulation epithelium drives pressure regulation bolt to move upward, and is disconnected by high heating value blast tube, after pressure declines, pressure regulation epithelium and pressure spring recover to initial condition under the effect of its elastic force, and high heating value blast tube keeps unimpeded state; When gaseous-pressure in fuel gas with low heat value passage is bigger, combustion gas drives moving upward of pressure regulation epithelium and pressure spring, pressure regulation epithelium drives pressure regulation bolt to move upward, fuel gas with low heat value passage is disconnected, after pressure declines, pressure regulation epithelium and pressure spring recover to initial condition under the effect of its elastic force, and fuel gas with low heat value passage keeps unimpeded state; The pressure regulation bolt of the structure of voltage regulation of the present invention can regulate the sensitive state of pressure regulation epithelium and pressure spring simultaneously, and namely the force value of pressure regulation epithelium and the pressure spring combustion gas in blast tube just moves time how many more than normal pressure.
Should be understood that these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention. In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.
Claims (8)
1. a self-adapting type gas pressure-reducing valve, it is characterised in that including:
One gas pressure-reducing valve, it includes a valve body, described valve body is provided with gas inlet and gas outlet, described gas inlet and described gas outlet are by being located at the blast tube connection of valve inner, and described gas inlet includes a high heating value gas inlet and a fuel gas with low heat value air inlet; Described gas outlet includes a high heating value gas outlet and a fuel gas with low heat value gas outlet; Described blast tube includes the high heating value blast tube and the fuel gas with low heat value passage that communicate; Described high heating value gas inlet connects with described high heating value gas outlet and described fuel gas with low heat value gas outlet respectively through described high heating value blast tube and described fuel gas with low heat value passage, and described fuel gas with low heat value air inlet connects with described fuel gas with low heat value gas outlet and described high heating value gas outlet respectively through described fuel gas with low heat value passage and described high heating value blast tube;
One premix chamber, it includes a shell, and described enclosure is provided with a cavity, and described shell is provided with air inlet, being additionally provided with a premix chamber gas inlet and a premix chamber gas outlet on described shell, described premix chamber gas inlet is sheathed on described gas outlet end.
2. self adaptation gas pressure-reducing valve according to claim 1, it is characterised in that described air inlet includes one first air inlet and one second air inlet.
3. self adaptation gas pressure-reducing valve according to claim 2, it is characterised in that also include one first push rod, it is located in described fuel gas with low heat value passage, and described first push rod can move upward described fuel gas with low heat value gas outlet seal.
4. self adaptation gas pressure-reducing valve according to claim 3, it is characterized in that, also include one first jacking block, itself and described first push rod abut against, described fuel gas with low heat value air inlet is sealed by described first jacking block, and described first jacking block can move upward and drive described first push rod to move upward.
5. self adaptation gas pressure-reducing valve according to claim 2, it is characterised in that also include a nozzle mounting seat, and described nozzle mounting seat can move upward and is sealed by described second air inlet.
6. self adaptation gas pressure-reducing valve according to claim 5, it is characterized in that, also include one second push rod, described second push rod is located at inside described high heating value blast tube, and described second push rod and described nozzle mounting seat abut against, described second push rod can drive described nozzle mounting seat to move upward.
7. self adaptation gas pressure-reducing valve according to claim 6, it is characterized in that, also include one second jacking block, itself and described second push rod abut against, described high heating value gas inlet is sealed by described second jacking block, and described second jacking block can move upward and drive described second push rod to move upward.
8. self adaptation gas pressure-reducing valve as claimed in any of claims 1 to 7, it is characterized in that, also include the high heating value gas stabilized-pressure structure and the fuel gas with low heat value structure of voltage regulation that are respectively arranged in described high heating value blast tube and described fuel gas with low heat value passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410045441.3A CN103791131B (en) | 2014-02-08 | 2014-02-08 | A kind of self-adapting type gas pressure-reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410045441.3A CN103791131B (en) | 2014-02-08 | 2014-02-08 | A kind of self-adapting type gas pressure-reducing valve |
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| CN103791131A CN103791131A (en) | 2014-05-14 |
| CN103791131B true CN103791131B (en) | 2016-06-15 |
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| CN201410045441.3A Active CN103791131B (en) | 2014-02-08 | 2014-02-08 | A kind of self-adapting type gas pressure-reducing valve |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2934614Y (en) * | 2006-02-28 | 2007-08-15 | 罗达莱克斯阀门(上海)有限公司 | Combustion gas device for small electric generator |
| CN101289972B (en) * | 2008-05-25 | 2012-04-25 | 蒙国宁 | Bidirectional decompression mixer |
| US20110259286A1 (en) * | 2010-04-21 | 2011-10-27 | Joseph Carl Firey | Common rail slurry fuel injector system |
| CN101881481B (en) * | 2010-06-10 | 2012-08-15 | 普鲁卡姆电器（上海）有限公司 | Dual-gas source combustion device |
| CN102840624B (en) * | 2012-09-13 | 2014-11-26 | 普鲁卡姆电器（上海）有限公司 | Self-adaptive type multi-gas-source gas control system |
| CN103557355A (en) * | 2013-11-13 | 2014-02-05 | 杨华昌 | Dual-fuel fuel gas reducing valve |
| CN203809808U (en) * | 2014-02-08 | 2014-09-03 | 普鲁卡姆电器（上海）有限公司 | Self-adaptive gas pressure-reducing valve |
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