CN102620053B - Compressed natural gas two-stage pressure reducing device - Google Patents
Compressed natural gas two-stage pressure reducing device Download PDFInfo
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- CN102620053B CN102620053B CN 201210109992 CN201210109992A CN102620053B CN 102620053 B CN102620053 B CN 102620053B CN 201210109992 CN201210109992 CN 201210109992 CN 201210109992 A CN201210109992 A CN 201210109992A CN 102620053 B CN102620053 B CN 102620053B
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Abstract
The invention discloses a compressed natural gas two-stage pressure reducing device. A primary high pressure cavity and a secondary high pressure cavity which are used for reducing pressure are arranged in a main body in the pressure reducing device, a piston assembly is matched with the primary high pressure cavity to form a primary pressure reducing mechanism, and a membrane assembly is matchedwith the secondary high pressure cavity to form a secondary pressure reducing mechanism. A gas inlet connector and a gas outlet connector are respectively arranged on the main body, and the gas inletconnector is communicated with the primary high pressure cavity. A lower cover is connected with the main body, a first circulating heat-absorbing structure is arranged in the lower cover, and the first circulating heat-absorbing structure is communicated with the primary high pressure cavity and the secondary high pressure cavity. The gas outlet connector is connected with a gas outlet pipe through a gas outlet radiator, and a second circulating heat-absorbing structure is arranged in the gas outlet radiator and communicated with the secondary high pressure cavity and the gas outlet pipe. The compressed natural gas two-stage pressure reducing device performs secondary pressure reduction to gas and further absorbs heat through a special radiating structure, thereby enabling the structure of the pressure reducing device to be compact, enlarging the radiating area of the radiator, enabling the radiating speed to be quick and enabling the efficiency to be high.
Description
Technical field
The present invention relates to a kind of decompressor, be specifically related to a kind of anti-freezing pressure reducing device for compressed natural gas.
Background technique
To form compressed natural gas (Compressed Natural Gas through overcompression and supercharging in the natural gas transport process, be called for short CNG), CNG is natural gas via filtration, the desulfurization in the defeated or gas well with pipe, dewater and be compressed to the 20MPa-25MPa storage of higher pressures, need when the user uses earlier the pressurized gas that store to be decompressed to through reduction valve to use required low pressure, make that the gas output pressure that enters the user side reduction valve is 0.3MPa-0.8MPa.High-pressure natural gas is in the gas decompression process, since the existence of pressure difference, the gas puffing, need to absorb a large amount of heats, cause the temperature of environment to descend, thereby easily cause gas pressure reducer to freeze, the decompressor cisco unity malfunction uses, and has a strong impact on the safety of pressure regulating equipment and decompression process.
At the problems referred to above, people provide multiple solution, and a kind of is the working method that adopts cascade, make pressure fall classification and reduce, and alleviate frosting to the influence of single-stage, and this is the method for comparatively using always.
Also having a kind of method is to be the disclosed method of utilizing water to circulate to heat the compressed natural gas reduction valve of Chinese patent of CN 202178249 U as publication number.
Though two kinds of above-mentioned methods are all practical, the former equipment will be multiplied, and the latter has then increased the equipment control link, certainly will will increase administrative staff's workload and responsibility.They more or less exist defective.
Summary of the invention
The present invention is directed to the natural decompressor of existing compression existing problem aspect antifreeze, and a kind of novel compressed natural gas twin-stage decompressor is provided.This decompressor improves radiating effect greatly by special radiating structure, and delivery pressure is stable.
In order to achieve the above object, the present invention adopts following technological scheme:
A kind of compressed natural gas twin-stage decompressor, described decompressor mainly comprises air inlet connecting head, parent, membrane combination, lower cover, air outlet adapter and steam outlet pipe, described decompressor also comprises piston in combination and the radiator of giving vent to anger, be provided with one-level hyperbaric chamber and secondary hyperbaric chamber for the twin-stage decompression in the described parent, described piston in combination matches with the one-level hyperbaric chamber and forms the one-level mechanism of decompressor, and described membrane combination matches with the secondary hyperbaric chamber and forms second depressurized mechanism; Described air inlet connecting head and air outlet adapter are separately positioned on the parent, and described air inlet connecting head is communicated with the one-level hyperbaric chamber; Described lower cover and parent join, and offer the first circulation heat-absorbing structure in it, and the described first circulation heat-absorbing structure is communicated with one-level hyperbaric chamber and secondary hyperbaric chamber; Described air outlet adapter joins by give vent to anger radiator and steam outlet pipe, offers the second circulation heat-absorbing structure in the described radiator of giving vent to anger, and the described second circulation heat-absorbing structure is communicated with secondary hyperbaric chamber and steam outlet pipe.
In preferred embodiment of the present invention, described parent is the brass material.
Described lower cover is aluminum alloy material.
The outside of described lower cover is provided with some heat absorption teeth.
The described first circulation heat-absorbing structure comprises some air inlets heat absorption hole and exhaust heat absorption hole, described some air inlet heat absorptions hole is offered to the bottom along lower cover from the top of lower cover, the inlet end in described air inlet heat absorption hole is positioned at the top of lower cover, and be communicated with the one-level hyperbaric chamber, the outlet side in described air inlet heat absorption hole is positioned at the lid of lower cover; Described exhaust heat absorption hole is offered to the bottom along lower cover from the top of lower cover, the inlet end in described exhaust heat absorption hole is positioned at the lid of lower cover and is communicated with the outlet side in all air inlet heat absorption holes, the outlet side in exhaust heat absorption hole is positioned at the top of lower cover, and is communicated with the secondary hyperbaric chamber.
Further, described some air inlets heat absorption hole is symmetrically distributed in around the exhaust heat absorption hole.
The outside of the described radiator of giving vent to anger is provided with some heat absorption teeth.
The described second circulation heat-absorbing structure comprises some exhausts heat absorption hole and air inlet heat absorption hole, described air inlet heat absorption hole is offered to the bottom along the main body of the radiator of giving vent to anger from the top of the radiator of giving vent to anger, the inlet end in described air inlet heat absorption hole is positioned at the top of the radiator of giving vent to anger, and be communicated with the secondary hyperbaric chamber by air outlet adapter, the outlet side in described air inlet heat absorption hole is positioned at the main body of the radiator of giving vent to anger; Described some exhaust heat absorptions hole is offered to the bottom along the main body of the radiator of giving vent to anger from the top of the radiator of giving vent to anger, the inlet end in some exhaust heat absorptions hole is positioned at the main body of the radiator of giving vent to anger, and be communicated with the outlet side in air inlet heat absorption hole, the outlet side in some exhaust heat absorptions hole is positioned at the top of the radiator of giving vent to anger, and is communicated with steam outlet pipe.
Further, described some exhausts heat absorption hole is symmetrically distributed in around the air inlet heat absorption hole.
The present invention who obtains according to such scheme makes up the decompression part of gas pressure reducer and the radiator portion mode with the best, can effectively avoid decompressor to freeze, and satisfies the use that high pressure CNG gas reduces pressure.
The present invention adopts piston in combination to carry out the decompression of one-level gas for guaranteeing the stable twin-stage pressure reduction structure that adopted of delivery pressure, and the post-decompression gas of one-level by special radiating structure, absorbs heat; And then carry out the secondary gas decompression of membrane combination, gas output is stable.Moreover be provided with corresponding radiation hole at lower cover and the inside of radiator of giving vent to anger, and can increase the area of contact of gas and parent, thus the lift gas endothermic effect.Radiator and lower cover adopt the working method of deep trouth heat radiation, both can make the decompressor more compact structure, can increase the heat diffusion area of radiator again, make heat dissipation rate faster, and efficient is higher.
Description of drawings
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of lower cover among the present invention;
Fig. 3 is the cross sectional representation of the radiator of giving vent to anger among the present invention.
Fig. 4 is that Fig. 3 is along the sectional view of A-A or B-B direction.
Fig. 5 is that Fig. 3 is along the sectional view of C-C or D-D direction.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to Fig. 1, compressed natural gas twin-stage decompressor provided by the present invention mainly comprises air inlet connecting head 1, parent 2, lower cover 3, loam cake 7, air outlet adapter 4, give vent to anger radiator 5 and steam outlet pipe 6.
Air inlet connecting head 1 is used for connecting source of the gas, and it is arranged on realizes on the parent 2 CNG is incorporated in the parent 2.
The decompression that parent 2 is used for CNG, its inside have two mechanisms of decompressor and realize the CNG twin-stage of introducing is reduced pressure.The inside of this parent 2 is provided with one-level hyperbaric chamber, secondary hyperbaric chamber, piston in combination and the membrane combination (not shown) for the twin-stage decompression for this reason, wherein piston in combination matches with the one-level hyperbaric chamber and forms the one-level mechanism of decompressor, and membrane combination matches with the secondary hyperbaric chamber and forms second depressurized mechanism.Decompressor adopts the twin-stage decompression to guarantee the stable of delivery pressure.
Cause gas pressure reducer to freeze because the gas puffing absorbs a large amount of heats in parent 2, the present invention further improves parent 2 heat absorption capacities.At first, parent of the present invention 2 adopts high brasses to guarantee the bearing strength of decompressor under the prerequisite that helps the gas heat absorption; Loam cake on it 7 adopts aluminum alloy to make simultaneously, helps the gas heat absorption like this, and is provided with some heat absorption teeth 71 in the outside of loam cake 7, and these heat absorption teeth 71 are even apart from distributing around loam cake 7 outer circumference directions, improve heat absorbing property.
Moreover, the present invention's parent 2 is provided with lower cover 3, lower cover 3 uses aluminum alloy to help the gas heat absorption, be provided with some heat absorption teeth 32 simultaneously in the outside of lower cover 3, these heat absorption teeth 32 are even apart from distributing around lower cover 3 outer circumference directions, improve heat absorbing property, be provided with the first circulation heat-absorbing structure 31 (as shown in Figure 2) in the inside of lower cover 3, one-level hyperbaric chamber and secondary hyperbaric chamber that the first circulation heat-absorbing structure 31 is communicated with in the parent 2, make gas in the inner area of contact that increases of parent by this first circulation heat-absorbing structure 31, improve heat absorbing property.
Referring to Fig. 2, this first circulation heat-absorbing structure 31 comprises some air inlets heat absorption hole 310 and exhaust heat absorption hole 311, some air inlet heat absorptions hole 310 is used for introducing through the post-decompression gas of one-level hyperbaric chamber, its top from lower cover 3 (end links to each other with parent) is offered to the bottom along lower cover, the inlet end in this air inlet heat absorption hole 310 is formed at the top (end links to each other with parent) of lower cover 3, and is communicated with the one-level hyperbaric chamber; And the outlet side in air inlet heat absorption hole is positioned at the lid of lower cover.
Wherein exhaust heat absorption hole 311 is offered to the bottom along lower cover from the top (end links to each other with parent) of lower cover 3, making the inlet end in exhaust heat absorption hole be formed in the lid of lower cover and with the outlet side in all air inlets heat absorption holes is communicated with, the outlet side in exhaust heat absorption hole is formed at the top of lower cover, and be communicated with the secondary hyperbaric chamber, advance the circulation heat-absorbing structure that a hole goes out thereby form a porous.
As shown in Figure 2, adopt three air inlet heat absorption holes 310 and exhaust heat absorption hole 311 its concrete numbers to be not limited to this in the present invention, can decide according to actual conditions), exhaust heat absorption hole 311 is arranged on the intermediate portion of lower cover, and three air inlet heat absorption holes 310 be evenly distributed on exhaust heat absorption hole 311 around.
In order further to improve the heat absorption efficiency of gas in the air inlet heat absorption hole, the invention enables air inlet heat absorption hole 310 on bearing of trend simultaneously to intermediate, inclined, make the axis in air inlet heat absorption hole 310 and the axis of lower cover 3 be 5 °-7 ° angle setting, be specifically as follows 6 °; Make that simultaneously the aperture in air inlet heat absorption hole 310 is big as far as possible, increase gas and area of contact lower cover 3 like this.
The first above-mentioned circulation heat-absorbing structure 31 will be split into multiply through the gas of once decompression by a plurality of air inlet heat absorptions hole 310, enter into lower cover by corresponding air inlet heat absorption hole 310 respectively, gas can both carry out sufficient exchange heat with lower cover in each air inlet heat absorption hole 310, effectively increased the area of contact of gas and parent, improve the performance of parent heat exchange greatly, effectively solved gas need absorb a large amount of heats at puffing problem.Gas after fully absorbing heat by each air inlet heat absorption hole 310 enters into the secondary hyperbaric chamber by exhaust heat absorption hole 311 discharge lower covers again and carries out second depressurized.
In order to solve gas in the problem of a large amount of heats of second depressurized expansion need absorption, the present invention arranges air outlet adapter 4 at parent 2, and connects the radiator 5 of giving vent to anger by air outlet adapter 4.
The radiator 5 of giving vent to anger is realized the gas that second depressurized expands is carried out heat exchange, avoids its a large amount of heat absorptions to cause gas pressure reducer to freeze.
Referring to Fig. 3, give vent to anger radiator 5 of the present invention adopts the material of being convenient to heat exchange to make, and its external structure adopts the dentation structure of being convenient to heat exchange.Radiator 5 outsides of giving vent to anger are provided with some heat absorption teeth 51, and it is even apart from distributing that these heat absorption teeth 51 lay out gas radiator 5 outer circumference directions, improves heat absorbing property.Simultaneously be provided with the second circulation heat-absorbing structure 52 in the inside of the radiator 5 of giving vent to anger.
This second circulation heat-absorbing structure 52 improves the performance of radiator and its internal gas heat exchange greatly by increasing the area of contact of gas and the radiator of giving vent to anger.
The second circulation heat-absorbing structure 52 among the present invention mainly comprises some exhausts heat absorption hole 520 and air inlet heat absorption hole 521 for this reason.Air inlet heat absorption hole 521 is offered to the bottom along the main body of the radiator of giving vent to anger from the top (end links to each other with air outlet adapter 4) of the radiator 52 of giving vent to anger, make the inlet end in air inlet heat absorption hole 521 be formed at the top of the radiator of giving vent to anger, and be communicated with the secondary hyperbaric chamber by air outlet adapter 4; Make the outlet side in air inlet heat absorption hole 521 be positioned at the main body of the radiator 5 of giving vent to anger simultaneously.
Some exhaust heat absorptions hole 520 is offered to the bottom along the main body of the radiator of giving vent to anger from the top (end links to each other with air outlet adapter 4) of the radiator of giving vent to anger, make the inlet end in some exhaust heat absorptions hole be positioned at the main body of the radiator of giving vent to anger, and be communicated with the outlet side in air inlet heat absorption hole, the outlet side in all exhaust heat absorption holes is positioned at the top of the radiator of giving vent to anger simultaneously, and be communicated with steam outlet pipe 6, thereby the circulation heat-absorbing structure that porous goes out is advanced in a hole.
As shown in Figure 3, (its concrete number is not limited to this to adopt 8 exhaust heat absorption holes 520 (being followed successively by 5201,5202,5203,5204,5205,5206,5027,5208 respectively) and an air inlet heat absorption hole 521 in the present invention, can decide according to actual conditions), air inlet heat absorption hole 521 is arranged on the intermediate portion of the radiator 5 of giving vent to anger, and 8 exhausts heat absorption hole 520 be evenly distributed on air inlet heat absorption hole 521 around, the heat absorption of exhaust according to actual needs hole 520 also can uneven distribution.
In order further to improve the heat absorption efficiency of gas in the exhaust heat absorption hole 520,8 exhaust heat absorption holes 520 among the present invention simultaneously to intermediate, inclined, i.e. have certain crossing angle between the axis in exhaust heat absorption hole and the axis of radiator 5 main bodys of giving vent to anger on bearing of trend.
According to the demand of reality, the angle of inclination in 8 exhaust heat absorption holes 520 can be different.As shown in Figure 4, it is depicted as two couples of exhausts heat absorptions hole 5203-5207,5201-5205 that relate separately in A-A direction and B-B direction, these two pairs of exhaust heat absorption holes adopt identical angle of inclination to arrange, and the axis angle in two exhausts heat absorption hole is 20 ° in every pair of concrete exhaust heat absorption hole.
As shown in Figure 5, it is depicted as two couples of exhausts heat absorptions hole 5204-5208,5206-5202 that relate separately in C-C direction and D-D direction, these two pairs of exhaust heat absorption holes adopt identical angle of inclination to arrange, and the axis angle in two exhausts heat absorption hole is 10 ° in every pair of concrete exhaust heat absorption hole.
Because two couples of exhausts heat absorptions hole 5204-5208,5206-5202 that C-C direction and D-D direction relate to lay respectively between two couples of exhausts heat absorptions hole 5203-5207, the 5201-5205 that A-A direction and B-B direction relate to, therefore, in the present invention, staggered to intermediate, inclined successively on bearing of trend between 8 exhausts heat absorption hole 5201,5202,5203,5204,5205,5206,5027,5208, effectively avoid exhaust heat absorption hole undue concentration to influence the problem of gas heat absorption capacity in it, thereby reach the purpose that improves gas heat absorption efficiency in the exhaust heat absorption hole 520.
Make in the present invention that simultaneously the aperture in exhaust heat absorption hole 520 is big as far as possible, increase gas and area of contact gas radiator 5 main bodys like this.
The second above-mentioned circulation heat-absorbing structure 52 will be introduced the second circulation heat-absorbing structure, 52 inside through the gas of secondary step-down by an air inlet heat absorption hole 521, by a plurality of exhaust heat absorptions hole 520 this gas is split into multiply again, in each exhaust heat absorption hole, gas can both fully contact with the radiator 5 of giving vent to anger, carry out sufficient heat exchange, effectively increased the area of contact of gas with the radiator 5 of giving vent to anger, make gas can absorb a large amount of heats timely, effectively solve gas need absorb a large amount of heats at the secondary puffing problem.Gas after fully absorbing heat is discharged by a plurality of exhausts heat absorptions hole 520 simultaneously, and enters into steam outlet pipe 6, thereby can effectively guarantee the flow of gas, does not influence follow-up use.
The present invention uses aluminum alloy to help the gas heat absorption at reduction valve loam cake and bottom material, parent adopts high brass to guarantee the bearing strength of decompressor under the prerequisite that helps the gas heat absorption, the inner special construction that adopts of parent makes gas in the inner area of contact that increases of parent simultaneously, improves heat absorbing property.Decompressor adopts the twin-stage decompression to guarantee the stable of delivery pressure.The radiator of giving vent to anger that is connected to special construction at the output terminal of decompressor heats again to post-decompression gas.
According to the compressed natural gas twin-stage decompressor that such scheme forms, its using process is summarized as follows:
At first gas connecting head 1 is connected with source of the gas, opening source of the gas makes gas enter in parent 2 mesohigh chambeies and the lower cover 3 through gas connecting head 1, gas is after the one-level decompression, fully absorb heat through the first circulation heat-absorbing structure 31 in the part lower cover 3, enter in the parent 2 the secondary hyperbaric chamber through again the decompression, arrive the radiator 5 of giving vent to anger through air outlet adapter 4, in the radiator 5 of giving vent to anger through the second circulation heat-absorbing structure 52, and in the second circulation heat-absorbing structure 52, after the abundant heat absorption of amplitude peak, finally enter steam outlet pipe 6 and discharge.
More than show and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1. compressed natural gas twin-stage decompressor, described decompressor mainly comprises air inlet connecting head, parent, membrane combination, lower cover, air outlet adapter and steam outlet pipe, it is characterized in that, described decompressor also comprises piston in combination and the radiator of giving vent to anger, be provided with one-level hyperbaric chamber and secondary hyperbaric chamber for the twin-stage decompression in the described parent, described piston in combination matches with the one-level hyperbaric chamber and forms the one-level mechanism of decompressor, and described membrane combination matches with the secondary hyperbaric chamber and forms second depressurized mechanism; Described air inlet connecting head and air outlet adapter are separately positioned on the parent, and described air inlet connecting head is communicated with the one-level hyperbaric chamber; Described lower cover and parent join, and offer the first circulation heat-absorbing structure in the lower cover, and the described first circulation heat-absorbing structure is communicated with one-level hyperbaric chamber and secondary hyperbaric chamber; Described air outlet adapter joins by give vent to anger radiator and steam outlet pipe, offers the second circulation heat-absorbing structure in the described radiator of giving vent to anger, and the described second circulation heat-absorbing structure is communicated with secondary hyperbaric chamber and steam outlet pipe; Wherein, the described first circulation heat-absorbing structure comprises some air inlets heat absorption hole and exhaust heat absorption hole, described some air inlet heat absorptions hole is offered to the bottom along lower cover from the top of lower cover, the inlet end in described air inlet heat absorption hole is positioned at the top of lower cover, and be communicated with the one-level hyperbaric chamber, the outlet side in described air inlet heat absorption hole is positioned at the lid of lower cover; Described exhaust heat absorption hole is offered to the bottom along lower cover from the top of lower cover, the inlet end in described exhaust heat absorption hole is positioned at the lid of lower cover and is communicated with the outlet side in all air inlet heat absorption holes, the outlet side in exhaust heat absorption hole is positioned at the top of lower cover, and is communicated with the secondary hyperbaric chamber.
2. a kind of compressed natural gas twin-stage decompressor according to claim 1 is characterized in that described parent is the brass material.
3. a kind of compressed natural gas twin-stage decompressor according to claim 1 is characterized in that described lower cover is aluminum alloy material.
4. according to claim 1 or 3 described a kind of compressed natural gas twin-stage decompressors, it is characterized in that the outside of described lower cover is provided with some heat absorption teeth.
5. a kind of compressed natural gas twin-stage decompressor according to claim 1 is characterized in that, described some air inlet heat absorptions hole is symmetrically distributed in around the exhaust heat absorption hole.
6. a kind of compressed natural gas twin-stage decompressor according to claim 1 is characterized in that the outside of the described radiator of giving vent to anger is provided with some heat absorption teeth.
7. a kind of compressed natural gas twin-stage decompressor according to claim 1, it is characterized in that, the described second circulation heat-absorbing structure comprises some exhausts heat absorption hole and air inlet heat absorption hole, described air inlet heat absorption hole is offered to the bottom along the main body of the radiator of giving vent to anger from the top of the radiator of giving vent to anger, the inlet end in described air inlet heat absorption hole is positioned at the top of the radiator of giving vent to anger, and be communicated with the secondary hyperbaric chamber by air outlet adapter, the outlet side in described air inlet heat absorption hole is positioned at the main body of the radiator of giving vent to anger; Described some exhaust heat absorptions hole is offered to the bottom along the main body of the radiator of giving vent to anger from the top of the radiator of giving vent to anger, the inlet end in some exhaust heat absorptions hole is positioned at the main body of the radiator of giving vent to anger, and be communicated with the outlet side in air inlet heat absorption hole, the outlet side in some exhaust heat absorptions hole is positioned at the top of the radiator of giving vent to anger, and is communicated with steam outlet pipe.
8. a kind of compressed natural gas twin-stage decompressor according to claim 7 is characterized in that, described some exhaust heat absorptions hole is symmetrically distributed in around the air inlet heat absorption hole.
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| CN 201210109992 CN102620053B (en) | 2012-04-14 | 2012-04-14 | Compressed natural gas two-stage pressure reducing device |
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| CN 201210109992 CN102620053B (en) | 2012-04-14 | 2012-04-14 | Compressed natural gas two-stage pressure reducing device |
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| CN102620053B true CN102620053B (en) | 2013-09-04 |
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| CN106286922B (en) * | 2016-10-27 | 2018-08-17 | 泸州江阳超能燃气有限责任公司 | A kind of pressure reducer for compressed natural gas pressure-reducing gas |
| CN109602963B (en) * | 2018-12-29 | 2021-04-13 | 捷锐企业(上海)有限公司 | Oxygen uptake and negative pressure suction integrated module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125762U (en) * | 1992-05-30 | 1992-12-23 | 天津市减压器厂 | Two-stage pressure reducer for air pipe line |
| CN200946756Y (en) * | 2006-09-19 | 2007-09-12 | 捷锐企业(上海)有限公司 | Decompression structure of gas decompressor |
| CN201159317Y (en) * | 2008-02-26 | 2008-12-03 | 戴小华 | Insertion type compressed natural gas two-stage pressure reducing valve |
| CN102116412A (en) * | 2009-12-30 | 2011-07-06 | 林建州 | Dual-stage gas decompressor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4046136B2 (en) * | 2006-02-20 | 2008-02-13 | ダイキン工業株式会社 | Refrigeration equipment |
| CN101354592A (en) * | 2008-07-17 | 2009-01-28 | 朱成伟 | Gas pressure reducer |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125762U (en) * | 1992-05-30 | 1992-12-23 | 天津市减压器厂 | Two-stage pressure reducer for air pipe line |
| CN200946756Y (en) * | 2006-09-19 | 2007-09-12 | 捷锐企业(上海)有限公司 | Decompression structure of gas decompressor |
| CN201159317Y (en) * | 2008-02-26 | 2008-12-03 | 戴小华 | Insertion type compressed natural gas two-stage pressure reducing valve |
| CN102116412A (en) * | 2009-12-30 | 2011-07-06 | 林建州 | Dual-stage gas decompressor |
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| Title |
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| JP特开2007-218565A 2007.08.30 |
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