CN108758335B - Self-suction drainage air duct of air bottle - Google Patents
Self-suction drainage air duct of air bottle Download PDFInfo
- Publication number
- CN108758335B CN108758335B CN201810836801.XA CN201810836801A CN108758335B CN 108758335 B CN108758335 B CN 108758335B CN 201810836801 A CN201810836801 A CN 201810836801A CN 108758335 B CN108758335 B CN 108758335B
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- extension section
- wall
- bottom hole
- air bottle
- extension
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- 239000007788 liquid Substances 0.000 abstract description 11
- 238000007664 blowing Methods 0.000 abstract description 10
- 238000009991 scouring Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sink And Installation For Waste Water (AREA)
Abstract
The invention relates to the field of high-pressure containers, and discloses an air bottle self-priming drainage air duct, which is arranged in a high-pressure air bottle, and comprises an elbow body and an extension section taking the elbow body as a starting point, wherein the inner diameter of the extension section is larger than that of the elbow body, the extension section is abutted against the inner wall of the high-pressure air bottle, a bottom hole is formed in one side, close to the inner wall of the high-pressure air bottle, of the extension section, and the bottom hole is positioned at one end, close to the elbow body, of the extension section; the relation between the aperture of the bottom hole and the inner diameter of the bent pipe body is as follows: the aperture of the bottom hole is more than or equal to 1/3 and the inner diameter of the bent pipe body is more than or equal to 1/2; the distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section. By using the self-priming drainage air duct of the air bottle, the inner wall of the air bottle can be prevented from being flushed by blowing air, the liquid is discharged fully, and the purpose of prolonging the service life of the high-pressure air bottle is realized.
Description
Technical Field
The invention relates to the field of high-pressure containers, in particular to a self-priming drainage air duct of an air bottle.
Background
When the high-pressure gas cylinder is applied, in the process of liquid discharge (pressure relief), liquid in the gas cylinder is not sufficiently discharged, namely certain accumulated liquid exists, the service life of the high-pressure gas cylinder is influenced because the accumulated liquid is usually corrosive, and in the process of blowing (pressurizing), gas flushes the inner wall of the gas cylinder, and the service life of the high-pressure gas cylinder is also influenced.
Disclosure of Invention
The invention aims to provide a self-priming drainage air duct of an air bottle, which can reduce the scouring of the inner wall of an air bottle by blowing air and fully drain liquid by using the self-priming drainage air duct of the air bottle, thereby realizing the purpose of prolonging the service life of a high-pressure air bottle.
Embodiments of the present invention are implemented as follows:
the self-priming drainage air duct of the air bottle is arranged in a high-pressure air bottle and comprises an elbow body and an extension section taking the elbow body as a starting point, the inner diameter of the extension section is larger than that of the elbow body, the extension section is abutted against the inner wall of the high-pressure air bottle, a bottom hole is formed in one side, close to the inner wall of the high-pressure air bottle, of the extension section, and the bottom hole is located at one end, close to the elbow body, of the extension section; the relation between the aperture of the bottom hole and the inner diameter of the bent pipe body is as follows: the aperture of the bottom hole is more than or equal to 1/3 and the inner diameter of the bent pipe body is more than or equal to 1/2; the distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section.
Further, the bent pipe body and the extension section are integrally formed, and an inner chamfer is arranged at the joint of the bent pipe body and the extension section.
Further, the chamfer is 60 °.
Further, the plane closest to the inner wall of the high-pressure gas cylinder of the extension section is taken as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 3-6 degrees.
The embodiment of the invention has the beneficial effects that:
1. after the high-pressure gas cylinder adopts the self-priming drainage gas guide pipe of the air cylinder, the liquid discharge effect reaches 100%, the high-pressure gas cylinder is prevented from being corroded by accumulated liquid, and the bottom hole airflow can not generate scouring force on the inner wall of the high-pressure gas cylinder during blowing, so that the service life of the high-pressure gas cylinder can be prolonged.
2. Under the condition that the liquid discharge effect is not affected, the extension section is properly lifted, the distance between the tail end of the extension section and the inner wall of the high-pressure gas cylinder is increased, gas diffusion is facilitated, scouring of gas to the inner wall of the high-pressure gas cylinder is reduced, and the service life of the high-pressure gas cylinder is further prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an application state diagram of the self-priming drainage air duct of the air bottle provided in embodiments 1 to 3 of the present invention;
FIG. 2 is an enlarged view of the air bottle self-priming drainage airway in FIG. 1, namely, the structure of the air bottle self-priming drainage airway provided in embodiments 1-3;
icon: the self-priming drainage air duct of the air bottle comprises a self-priming drainage air duct of the air bottle, a 2-bent pipe body, a 3-extension section, a 4-bottom hole, a 5-chamfer angle, a 6-high pressure air bottle and a 7-high pressure air bottle inner wall.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The self-priming drainage air duct of the air bottle provided by the embodiment of the invention is specifically described below.
As shown in fig. 1 and 2, the embodiment provides an air bottle self-priming drainage air duct, which is placed in a high-pressure air bottle, and comprises an elbow body and an extension section taking the elbow body as a starting point, wherein the inner diameter of the extension section is larger than that of the elbow body, the extension section is abutted against the inner wall of the high-pressure air bottle, a bottom hole is formed in one side, close to the inner wall of the high-pressure air bottle, of the extension section, and the bottom hole is positioned at one end, close to the elbow body, of the extension section; the relation between the aperture of the bottom hole and the inner diameter of the bent pipe body is as follows: the aperture of the bottom hole is more than or equal to 1/3 and the inner diameter of the bent pipe body is more than or equal to 1/2. A large number of experiments prove that after the high-pressure gas cylinder adopts the self-priming drainage gas guide pipe of the air cylinder, the drainage effect reaches 100%, the corrosion of accumulated liquid to the high-pressure gas cylinder is avoided, and the bottom hole gas flow can not generate scouring force to the inner wall of the high-pressure gas cylinder during blowing, so that the service life of the high-pressure gas cylinder can be prolonged.
The distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section, the plane closest to the inner wall of the high-pressure gas cylinder of the extension section is taken as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 3-6 degrees. Under the condition that the drainage effect is not affected, the extension section is properly lifted, the distance between the tail end of the extension section and the inner wall of the high-pressure gas cylinder is increased, gas diffusion is facilitated, scouring of gas to the inner wall of the high-pressure gas cylinder is reduced, and the service life of the high-pressure gas cylinder is further prolonged.
In the actual production process, the bent pipe body and the extension section are integrally formed, the inner diameter of the extension section is enlarged through reaming, and an inner chamfer is arranged at the joint of the bent pipe body and the extension section and is 60 degrees. Through setting up the chamfer, can reduce the hindrance that produces because of the aperture mutation when flowing back, make the drainage hydrops smoother.
The features and capabilities of the present invention are described in further detail below in connection with particular embodiments.
Example 1
The utility model provides an air bottle is from inhaling drainage air duct, air bottle is from inhaling drainage air duct is placed in the high-pressure gas cylinder, and air bottle is from inhaling drainage air duct includes return bend body and uses return bend body as the extension of starting point, and the internal diameter of extension is greater than the internal diameter of return bend body, return bend body and extension integrated into one piece, and the junction of return bend body and extension is equipped with 60 interior chamfers. The extension section is close to the inner wall of the high-pressure gas cylinder, a bottom hole is formed in one side, close to the inner wall of the high-pressure gas cylinder, of the extension section, and the bottom hole is located at one end, close to the bent pipe body, of the extension section. The distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section, the plane closest to the inner wall of the high-pressure gas cylinder of the extension section is taken as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 3 degrees. The inner diameter of the bent pipe body is 20mm, the aperture of the bottom hole is 6.7mm, and the aperture of the bottom hole/the inner diameter of the bent pipe body is=1/3.
Example 2
The utility model provides an air bottle is from inhaling drainage air duct, air bottle is from inhaling drainage air duct is placed in the high-pressure gas cylinder, and air bottle is from inhaling drainage air duct includes return bend body and uses return bend body as the extension of starting point, and the internal diameter of extension is greater than the internal diameter of return bend body, return bend body and extension integrated into one piece, and the junction of return bend body and extension is equipped with 60 interior chamfers. The extension section is close to the inner wall of the high-pressure gas cylinder, a bottom hole is formed in one side, close to the inner wall of the high-pressure gas cylinder, of the extension section, and the bottom hole is located at one end, close to the bent pipe body, of the extension section. The distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section, the plane closest to the inner wall of the high-pressure gas cylinder of the extension section is taken as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 5 degrees. The inner diameter of the elbow body is 20mm, the aperture of the bottom hole is 8mm, and the aperture of the bottom hole/the inner diameter of the elbow body=4/10.
Example 3
The utility model provides an air bottle is from inhaling drainage air duct, air bottle is from inhaling drainage air duct is placed in the high-pressure gas cylinder, and air bottle is from inhaling drainage air duct includes return bend body and uses return bend body as the extension of starting point, and the internal diameter of extension is greater than the internal diameter of return bend body, return bend body and extension integrated into one piece, and the junction of return bend body and extension is equipped with 60 interior chamfers. The extension section is close to the inner wall of the high-pressure gas cylinder, a bottom hole is formed in one side, close to the inner wall of the high-pressure gas cylinder, of the extension section, and the bottom hole is located at one end, close to the bent pipe body, of the extension section. The distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section, the plane closest to the inner wall of the high-pressure gas cylinder of the extension section is taken as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 6 degrees. The inner diameter of the bent pipe body is 20mm, the aperture of the bottom hole is 10.3mm, and the aperture of the bottom hole/the inner diameter of the bent pipe body is=1/2.
Comparative example 1
The utility model provides an air bottle is from inhaling drainage air duct, air bottle is from inhaling drainage air duct is placed in the high-pressure gas cylinder, and air bottle is from inhaling drainage air duct includes return bend body and uses return bend body as the extension of starting point, and the internal diameter of extension is greater than the internal diameter of return bend body, return bend body and extension integrated into one piece, and the junction of return bend body and extension is equipped with 60 interior chamfers. The extension section is close to the inner wall of the high-pressure gas cylinder, a bottom hole is formed in one side, close to the inner wall of the high-pressure gas cylinder, of the extension section, and the bottom hole is located at one end, close to the bent pipe body, of the extension section. The distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section, the plane closest to the inner wall of the high-pressure gas cylinder of the extension section is taken as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 5 degrees. The inner diameter of the elbow body is 20mm, the aperture of the bottom hole is 4mm, and the aperture of the bottom hole/the inner diameter of the elbow body=2/10.
Comparative example 2
The utility model provides an air bottle is from inhaling drainage air duct, air bottle is from inhaling drainage air duct is placed in the high-pressure gas cylinder, and air bottle is from inhaling drainage air duct includes return bend body and uses return bend body as the extension of starting point, and the internal diameter of extension is greater than the internal diameter of return bend body, return bend body and extension integrated into one piece, and the junction of return bend body and extension is equipped with 60 interior chamfers. The extension section is close to the inner wall of the high-pressure gas cylinder, a bottom hole is formed in one side, close to the inner wall of the high-pressure gas cylinder, of the extension section, and the bottom hole is located at one end, close to the bent pipe body, of the extension section. The distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section, the tangent plane of the inner wall of the high-pressure gas cylinder closest to the extension section is used as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 5 degrees. The inner diameter of the elbow body is 20mm, the bottom hole diameter is 5mm, and the bottom hole diameter/elbow body inner diameter=2.5/10.
Comparative example 3
The utility model provides an air bottle is from inhaling drainage air duct, air bottle is from inhaling drainage air duct is placed in the high-pressure gas cylinder, and air bottle is from inhaling drainage air duct includes return bend body and uses return bend body as the extension of starting point, and the internal diameter of extension is greater than the internal diameter of return bend body, return bend body and extension integrated into one piece, and the junction of return bend body and extension is equipped with 60 interior chamfers. The extension section is close to the inner wall of the high-pressure gas cylinder, a bottom hole is formed in one side, close to the inner wall of the high-pressure gas cylinder, of the extension section, and the bottom hole is located at one end, close to the bent pipe body, of the extension section. The distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section, the plane closest to the inner wall of the high-pressure gas cylinder of the extension section is taken as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 5 degrees. The inner diameter of the elbow body is 20mm, the aperture of the bottom hole is 12mm, and the aperture of the bottom hole/the inner diameter of the elbow body=6/10.
Comparative example 4
The utility model provides an air bottle is from inhaling drainage air duct, air bottle is from inhaling drainage air duct is placed in the high-pressure gas cylinder, and air bottle is from inhaling drainage air duct includes return bend body and uses return bend body as the extension of starting point, and the internal diameter of extension is greater than the internal diameter of return bend body, return bend body and extension integrated into one piece, and the junction of return bend body and extension is equipped with 60 interior chamfers. The extension section is close to the inner wall of the high-pressure gas cylinder, a bottom hole is formed in one side, close to the inner wall of the high-pressure gas cylinder, of the extension section, and the bottom hole is located at one end, close to the bent pipe body, of the extension section. The distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section, the plane closest to the inner wall of the high-pressure gas cylinder of the extension section is taken as a reference plane, and the included angle between the central axis of the extension section and the reference plane is 5 degrees. The inner diameter of the elbow body is 20mm, the bottom hole diameter is 14mm, and the bottom hole diameter/elbow body inner diameter=7/10.
Test example 1
The air bottle self-priming drainage air duct prepared in examples 1 to 3 and comparative examples 1 to 4 was subjected to an air blowing test, which was performed by: the self-priming drainage air duct of the air bottle is arranged on the tool frame, a basin of water is placed below the extending section, the extending section is close to the water surface, the bottom hole is opposite to the water surface (the extending section is kept at a distance of 3-5mm from the water surface), the self-priming drainage air duct of the air bottle is inflated, the inflation pressure is 3.5Mpa, whether vortex appears on the water surface is observed, if the vortex appears on the water surface, positive pressure is generated when air blowing is proved, namely the bottom hole has scouring force on the inner wall of the high-pressure air bottle, and if the vortex does not appear on the water surface, the bottom hole has no scouring force on the inner wall of the high-pressure air bottle. The specific test data are shown in the following table:
test example 2
The test method comprises the following steps: the drainage (pressure release) test (i.e., examples 1 to 3) was performed on the group having no scouring force on the inner wall of the high-pressure gas cylinder in test example 1, and the drainage test was performed by: the method comprises the steps of simulating the actual use working condition of a high-pressure gas cylinder, placing the high-pressure gas cylinder on a level meter operation table, wherein the level meter operation table and a straight line section of a cylinder body form an angle of 1 DEG, and an air cylinder self-priming drainage air guide pipe is positioned in the middle of the liquid level in the high-pressure gas cylinder, and the inflation pressure is 3.5Mpa. The specific test data are shown in the following table:
experimental example 3
The inner diameter of the bent pipe body is 25mm, the aperture of the bottom hole is correspondingly modified in proportion, and when the aperture of the bottom hole/the inner diameter of the bent pipe body is the same as the numerical values of the experimental examples 1 and 2, the drainage and blowing experimental results are approximately the same.
Experimental example 4
The inner diameter of the bent pipe body is 15mm, the aperture of the bottom hole is correspondingly modified in proportion, and when the aperture of the bottom hole/the inner diameter of the bent pipe body is the same as that of the experimental examples 1, 2 and 3, the drainage and blowing experimental results are approximately the same.
In summary, when the aperture of the bottom hole is not more than 1/3 and the inner diameter of the bent pipe body is not more than 1/2, the drainage effect reaches 100%, and the bottom hole airflow does not generate scouring force on the inner wall of the high-pressure gas cylinder during blowing, so that the service life of the high-pressure gas cylinder can be prolonged.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The self-priming drainage air duct of the air bottle is arranged in a high-pressure air bottle and is characterized by comprising an elbow body and an extension section taking the elbow body as a starting point, wherein the inner diameter of the extension section is larger than that of the elbow body, the extension section is abutted against the inner wall of the high-pressure air bottle, a bottom hole is formed in one side, close to the inner wall of the high-pressure air bottle, of the extension section, and the bottom hole is positioned at one end, close to the elbow body, of the extension section; the relation between the aperture of the bottom hole and the inner diameter of the bent pipe body is as follows: the aperture of the bottom hole is more than or equal to 1/3 and the inner diameter of the bent pipe body is more than or equal to 1/2; the distance between the extension section and the inner wall of the high-pressure gas cylinder is gradually increased along the extension direction of the extension section; the bent pipe body and the extension section are integrally formed, an inner chamfer is arranged at the joint of the bent pipe body and the extension section, and the chamfer is 60 degrees; and taking the plane closest to the inner wall of the high-pressure gas cylinder of the extension section as a reference plane, wherein the included angle between the central axis of the extension section and the reference plane is 3-6 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810836801.XA CN108758335B (en) | 2018-07-26 | 2018-07-26 | Self-suction drainage air duct of air bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810836801.XA CN108758335B (en) | 2018-07-26 | 2018-07-26 | Self-suction drainage air duct of air bottle |
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| Publication Number | Publication Date |
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| CN108758335A CN108758335A (en) | 2018-11-06 |
| CN108758335B true CN108758335B (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810836801.XA Active CN108758335B (en) | 2018-07-26 | 2018-07-26 | Self-suction drainage air duct of air bottle |
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| CN (1) | CN108758335B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115493393B (en) * | 2022-11-17 | 2023-02-28 | 杭州贝斯特气体有限公司 | Ultrahigh-purity gas cylinder drying and evacuating system |
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| CN107588318A (en) * | 2017-09-22 | 2018-01-16 | 江苏江海船舶设备制造有限公司 | A kind of air bottle |
| CN208719836U (en) * | 2018-07-26 | 2019-04-09 | 成都格瑞特高压容器有限责任公司 | Air bottle self-priming draining wireway |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2230866Y (en) * | 1994-09-20 | 1996-07-10 | 陈志强 | Liquidized gas combustion aid |
| CN2241286Y (en) * | 1995-07-10 | 1996-11-27 | 戴梦周 | Device for complete hurning of liquefied gas residue in steel cylinder |
| JP2001324098A (en) * | 2000-05-15 | 2001-11-22 | Furoomu:Kk | Content discharging device for pressure vessel |
| CN202419131U (en) * | 2011-12-22 | 2012-09-05 | 江南工业集团有限公司 | Blowdown device of compressed natural gas cylinder |
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| CN202927477U (en) * | 2012-11-14 | 2013-05-08 | 西安轨道交通装备有限责任公司 | Internal pipeline of low-temperature container |
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| CN208719836U (en) * | 2018-07-26 | 2019-04-09 | 成都格瑞特高压容器有限责任公司 | Air bottle self-priming draining wireway |
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| Publication number | Publication date |
|---|---|
| CN108758335A (en) | 2018-11-06 |
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