CN116771961A - Extra-high pressure container capable of exhausting and exhausting method - Google Patents
Extra-high pressure container capable of exhausting and exhausting method Download PDFInfo
- Publication number
- CN116771961A CN116771961A CN202311035480.0A CN202311035480A CN116771961A CN 116771961 A CN116771961 A CN 116771961A CN 202311035480 A CN202311035480 A CN 202311035480A CN 116771961 A CN116771961 A CN 116771961A
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- China
- Prior art keywords
- cylinder
- container
- inner shell
- cavity
- end cap
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 14
- 238000013022 venting Methods 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000462 isostatic pressing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J12/00—Pressure vessels in general
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J13/00—Covers or similar closure members for pressure vessels in general
- F16J13/24—Covers or similar closure members for pressure vessels in general with safety devices, e.g. to prevent opening prior to pressure release
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention belongs to the technical field of ultrahigh pressure equipment, and particularly relates to an ultrahigh pressure container capable of exhausting and an exhaust method. The utility model provides a can exhaust super high pressure vessel, including super high pressure vessel body and can exhaust the end cover, super high pressure vessel body includes container inner shell and container shell, container inner side bottom is equipped with the container base, container base middle part is equipped with the liquid filling hole, can exhaust the end cover and include end cap, end cover installation base and hydro-cylinder, end cap and container inner shell inner chamber assorted, end cap installation base fixed mounting is in container shell outside upper portion, fixedly on it is equipped with the hydro-cylinder, end cap side fixedly connected with connecting rod, the activity of hydro-cylinder stretches out the lower terminal surface fixed connection of end and connecting rod. The invention can discharge the gas in the ultrahigh pressure container from the gap between the end cover capable of discharging and the inner shell of the container by moving the end cover capable of discharging up and down, can not cause leakage while rapidly and safely discharging the gas in the ultrahigh pressure container, and is suitable for the operation of ultrahigh pressure equipment.
Description
Technical Field
The invention belongs to the technical field of ultrahigh pressure equipment, and particularly relates to an ultrahigh pressure container capable of exhausting and an exhaust method.
Background
The exhaust of the ultrahigh pressure container is one of very important links in the operation process of ultrahigh equipment, and for an ultrahigh pressure isostatic press, the existence of gas in the container not only influences the surface quality of a workpiece, but also is extremely easy to cause high-pressure leakage, even safety accidents and the like.
The exhaust valve is generally adopted in the existing ultra-high pressure isostatic pressing machine, and patent 202220788458.8 provides a new structure of the isostatic pressing machine exhaust valve. However, the use of an exhaust valve has the following problems: 1. the exhaust valve has a short service life and needs to be checked and replaced frequently. 2. The reliability of the exhaust valve is not high. 3. The use of an exhaust valve also does not ensure that the gas in the container is purged. 4. The exhaust valve is easy to leak and is also a potential safety hazard point. 5. For the exhaust valve with ultrahigh pressure, the processing and manufacturing difficulties are high, and the cost is high.
Therefore, a brand new method and device for exhausting the ultrahigh pressure container are urgently needed to solve the problems, so that the gas in the container can be safely and reliably exhausted, leakage cannot be caused, and the method and device are suitable for operation of ultrahigh pressure equipment.
Disclosure of Invention
In view of the above problems, the present invention aims to provide an ultrahigh pressure container capable of exhausting gas and an exhaust method thereof, wherein the exhaust end cover moves up and down, so that gas in the ultrahigh pressure container is exhausted from a gap between the exhaust end cover and a container inner shell, and the gas in the ultrahigh pressure container is exhausted rapidly and safely without leakage, and the ultrahigh pressure container is suitable for operation of ultrahigh pressure equipment.
The technical scheme of the invention is as follows: the utility model provides a can exhaust super high pressure vessel, includes the super high pressure vessel body and installs but the exhaust end cover at super high pressure vessel body top, the super high pressure vessel body includes the container inner shell body, the container inner shell body outside is equipped with the container shell body, the inboard bottom of container inner shell body is equipped with the container base, container base middle part is equipped with the liquid filling hole, but the exhaust end cover includes end cap, end cover installation base and hydro-cylinder, the end cap with container inner shell inner chamber assorted, end cover installation base fixed mounting is in container outer shell body outside upper portion, the last fixed hydro-cylinder that is equipped with of end cover installation base, end cap side fixedly connected with connecting rod, the activity of hydro-cylinder stretch out the end with the connecting rod is kept away from the lower terminal surface fixed connection of end cap one side.
The axis of the movable extending end of the oil cylinder is parallel to the central axis of the inner shell of the container, and the central axis of the inner shell of the container coincides with the central axis of the end cover cap.
The end cap is of a segmented cylinder structure and is divided into a first cylinder and a second cylinder from top to bottom, the diameter of the first cylinder is larger than that of the second cylinder, the inner cavity of the inner shell of the container is of a segmented cylinder cavity structure and is divided into a first cylinder cavity and a second cylinder cavity from top to bottom, the diameter of the first cylinder cavity is larger than that of the second cylinder cavity, the diameter of the second cylinder cavity is the same as that of the second cylinder, and the diameter of the first cylinder cavity is larger than that of the first cylinder.
The cylindrical transition section is arranged between the first cylinder and the second cylinder, the cylindrical transition section is in a round table shape, the cylindrical cavity transition section is arranged between the first cylindrical cavity and the second cylindrical cavity, and the cylindrical cavity transition section is matched with the cylindrical transition section in shape.
And an ultrahigh pressure sealing piece is arranged on the side surface of the lower part of the second cylinder.
The diameter of the first cylindrical cavity is larger than that of the first cylinder, and the difference value between the diameter of the first cylindrical cavity and the diameter of the first cylindrical cavity is 2 mm-5 mm.
An ultrahigh pressure container exhausting method using an ultrahigh pressure container capable of exhausting as described above comprises the following steps:
s1: firstly, driving the movable extending end of the oil cylinder to move upwards to drive the end cap of the exhaust end cover to rise, so that the lower end of the second cylinder of the end cap is positioned in the first cylinder cavity of the inner shell of the container, and at the moment, an exhaust position is formed, and a gap exists between the second cylinder and the first cylinder cavity;
s2: filling a medium into the inner shell of the container through a liquid filling hole in the middle of the container base until the medium passes through the second cylinder, wherein the second cylinder cavity in the inner shell of the container is filled with the medium, and the inner shell of the container finishes exhausting;
s3: the movable extending end of the driving oil cylinder moves downwards to drive the end cap of the exhaust end cap to descend, the lower end of the second cylinder of the end cap is positioned in the second cylinder cavity of the inner shell of the container, after sealing is formed, medium charging is continuously carried out, and the pressure in the inner shell of the container reaches rated working pressure.
The invention has the technical effects that: according to the invention, the end cap is arranged into a sectional cylinder structure, the inner cavity of the container inner shell is arranged into a sectional cylinder cavity structure, and the end cap is arranged at different positions between the inner cavities of the container inner shell, so that the natural discharge of the gas in the container through the gap between the end cap and the inner cavity of the container inner shell can be realized, the sealing between the end cap and the inner cavity of the container inner shell can be realized, the gas in the ultrahigh pressure container can be rapidly and safely discharged without leakage, the ultrahigh pressure container is suitable for the operation of ultrahigh pressure equipment, and the problems of potential safety hazards and unclean discharge caused by the exhaust valve of the existing ultrahigh pressure equipment are solved.
Further description will be made below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an ultrahigh pressure container capable of exhausting air in an exhaust position according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of an ultrahigh pressure container capable of exhausting at a filling position according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an ultrahigh pressure container capable of exhausting in a pressurizing position according to an embodiment of the invention.
Reference numerals: the device comprises a 1-ventable end cover, a 11-end cap, a 12-end cover mounting base, a 13-oil cylinder, a 14-ultrahigh pressure sealing piece, a 15-connecting rod, a 2-ultrahigh pressure container body, a 21-container inner shell, a 22-container outer shell, a 3-medium, a 4-container base and a 5-liquid filling hole.
Detailed Description
Example 1
As shown in fig. 1-3, an ultrahigh pressure container capable of exhausting comprises an ultrahigh pressure container body 2 and an exhaust end cover 1 arranged at the top of the ultrahigh pressure container body 2, wherein the ultrahigh pressure container body 2 comprises a container inner shell 21, a container outer shell 22 is arranged at the outer side of the container inner shell 21, a container base 4 is arranged at the bottom of the inner side of the container inner shell 21, a liquid filling hole 5 is formed in the middle of the container base 4, the exhaust end cover 1 comprises an end cap 11, an end cover mounting base 12 and an oil cylinder 13, the end cap 11 is matched with the inner cavity of the container inner shell 21, the end cover mounting base 12 is fixedly arranged at the upper part of the outer side of the container outer shell 22, the oil cylinder 13 is fixedly arranged on the end cover mounting base 12, a connecting rod 15 is fixedly connected to the side surface of the end cap 11, and the movable extending end of the oil cylinder 13 is fixedly connected with the lower end surface of the connecting rod 15, which is far away from one side of the end cap 11.
In the actual use process, the movable extending end of the oil cylinder 13 is driven to move upwards to drive the end cover cap 11 of the exhaust end cover 1 to ascend, so that a gap exists between the end cover cap 11 and the inner cavity of the inner shell 21 of the container; the middle part of the container base 4 is provided with the liquid filling hole 5 to fill the medium 3 in the container inner shell 21, so that the exhaust of the container inner shell 21 is realized, the gas in the container is naturally exhausted through the gap between the end cap and the inner cavity of the container inner shell, the sealing between the end cap and the inner cavity of the container inner shell can be realized, the gas in the ultrahigh pressure container is rapidly and safely exhausted, the leakage cannot be caused, the device is suitable for the operation of ultrahigh pressure equipment, and the problems that the potential safety hazard and unclean exhaust are caused by the exhaust valve in the prior ultrahigh pressure equipment are solved.
Example 2
Preferably, in this embodiment 1, the axis of the movable protruding end of the oil cylinder 13 is parallel to the central axis of the container inner housing 21, and the central axis of the container inner housing 21 coincides with the central axis of the end cap 11.
In the practical use process, the axis of the movable extending end of the oil cylinder 13 is parallel to the central axis of the container inner shell 21, the central axis of the container inner shell 21 is coincident with the central axis of the end cap 11, and the end cap 11 is ensured to naturally discharge the gas in the container through the gap between the end cap and the inner cavity of the container inner shell and realize the sealing between the end cap and the inner cavity of the container inner shell in the up-down movement process.
Example 3
Preferably, in this embodiment, the end cap 11 is a segmented cylinder structure, and is divided into a first cylinder and a second cylinder from top to bottom, where the diameter D1 of the first cylinder is greater than the diameter D0 of the second cylinder, the inner cavity of the inner shell 21 of the container is a segmented cylinder cavity structure, and is divided into a first cylinder cavity and a second cylinder cavity from top to bottom, the diameter D1 of the first cylinder cavity is greater than the diameter D0 of the second cylinder cavity, the diameter of the second cylinder cavity is the same as the diameter of the second cylinder, and the diameter of the first cylinder cavity is greater than the diameter of the first cylinder.
In the actual use process, firstly, the movable extending end of the oil cylinder 13 is driven to move upwards to drive the end cap 11 of the exhaust end cap 1 to ascend, the movement distance s1 is that the lower end of the second cylinder of the end cap 11 is positioned in the first cylinder cavity of the inner shell 21 of the container, at the moment, the exhaust position is the exhaust position, and a gap t exists between the second cylinder and the first cylinder cavity; filling the medium 3 into the container inner shell 21 through the liquid filling hole 5 arranged in the middle of the container base 4 until the medium 3 passes through the second cylinder, and at the moment, the second cylinder cavity in the container inner shell 21 is filled with the medium 3, and the container inner shell 21 finishes exhausting; the movable extending end of the driving oil cylinder 13 moves downwards to drive the end cap 11 of the exhaust end cap 1 to descend, the lower end of the second cylinder of the end cap 11 is positioned in the second cylinder cavity of the inner shell 21 of the container, after sealing is formed, the medium filling 3 is continuously pressurized until the pressure in the inner shell 21 of the container reaches the rated working pressure. The invention can realize the natural discharge of the gas in the container through the gap between the end cap and the inner cavity of the inner shell of the container, can realize the sealing between the end cap and the inner cavity of the inner shell of the container, can not cause leakage while rapidly and safely discharging the gas in the ultrahigh pressure container, is suitable for the operation of ultrahigh pressure equipment, and solves the problems of potential safety hazard and unclean discharge caused by the exhaust of the existing ultrahigh pressure equipment by virtue of the exhaust valve.
Example 4
Preferably, in this embodiment, a cylindrical transition section is disposed between the first cylinder and the second cylinder, the cylindrical transition section is in a truncated cone shape, a cylindrical cavity transition section is disposed between the first cylindrical cavity and the second cylindrical cavity, and the cylindrical cavity transition section is matched with the cylindrical transition section in shape.
In the actual use process, a cylinder transition section is arranged between the first cylinder and the second cylinder, the cylinder transition section is in a circular truncated cone shape, a cylinder cavity transition section is arranged between the first cylinder cavity and the second cylinder cavity, and the shape of the cylinder cavity transition section is matched with that of the cylinder transition section, so that sealing between the end cap and the inner cavity of the inner shell of the container is conveniently realized.
Example 5
Preferably, on the basis of embodiment 1 or embodiment 4, in this embodiment, the lower side of the second cylinder is provided with an ultrahigh pressure seal 14.
In the practical use process, the side surface of the lower part of the second cylinder is provided with the ultrahigh pressure sealing piece 14, so that the sealing between the end cap and the inner cavity of the inner shell of the container is conveniently realized.
Example 6
Preferably, in this embodiment, on the basis of embodiment 1 or embodiment 5, the diameter of the first cylindrical cavity is greater than that of the first cylinder, and the difference between the two is in a range of 2mm to 5mm.
In the actual use process, the diameter of the first cylindrical cavity is larger than that of the first cylindrical cavity, the difference value between the diameter of the first cylindrical cavity and the diameter of the first cylindrical cavity is 2 mm-5 mm, and therefore gas in the container can be naturally discharged through a gap between the end cap and the inner cavity of the shell in the container without leakage.
Example 7
An ultrahigh pressure container exhausting method using an ultrahigh pressure container capable of exhausting as described above comprises the following steps:
s1: firstly, the movable extending end of the oil cylinder 13 is driven to move upwards to drive the end cap 11 of the exhaust end cap 1 to ascend, the lower end of the second cylinder of the end cap 11 is positioned in the first cylinder cavity of the inner shell 21 of the container, at the moment, the exhaust position is adopted, and a gap exists between the second cylinder and the first cylinder cavity;
s2: filling the medium 3 into the container inner shell 21 through the liquid filling hole 5 arranged in the middle of the container base 4 until the medium 3 passes through the second cylinder, and at the moment, the second cylinder cavity in the container inner shell 21 is filled with the medium 3, and the container inner shell 21 finishes exhausting;
s3: the movable extending end of the driving oil cylinder 13 moves downwards to drive the end cap 11 of the exhaust end cap 1 to descend, the lower end of the second cylinder of the end cap 11 is positioned in the second cylinder cavity of the inner shell 21 of the container, after sealing is formed, the medium filling 3 is continuously pressurized until the pressure in the inner shell 21 of the container reaches the rated working pressure.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. An ultra-high pressure container capable of exhausting, which is characterized in that: including ultra-high pressure vessel body (2) and install can exhaust end cover (1) at ultra-high pressure vessel body (2) top, ultra-high pressure vessel body (2) include container inner shell (21), container inner shell (21) outside is equipped with container shell (22), container inner shell (21) inboard bottom is equipped with container base (4), container base (4) middle part is equipped with liquid filling hole (5), can exhaust end cover (1) include end cap (11), end cover mounting base (12) and hydro-cylinder (13), end cap (11) with container inner shell (21) inner chamber assorted, end cover mounting base (12) fixed mounting is in container shell (22) outside upper portion, be equipped with on end cover mounting base (12) hydro-cylinder (13), end cap (11) side fixedly connected with connecting rod (15), the activity of hydro-cylinder (13) stretch out the end with connecting rod (15) is kept away from the lower terminal surface fixed connection of end cap (11) one side.
2. The vented ultra-high pressure vessel as recited in claim 1, wherein: the axis of the movable extending end of the oil cylinder (13) is parallel to the central axis of the container inner shell (21), and the central axis of the container inner shell (21) coincides with the central axis of the end cover cap (11).
3. The vented ultra-high pressure vessel as recited in claim 1, wherein: the end cap (11) is of a segmented cylinder structure and is divided into a first cylinder and a second cylinder from top to bottom, the diameter of the first cylinder is larger than that of the second cylinder, the inner cavity of the container inner shell (21) is of a segmented cylinder cavity structure and is divided into a first cylinder cavity and a second cylinder cavity from top to bottom, the diameter of the first cylinder cavity is larger than that of the second cylinder cavity, the diameter of the second cylinder cavity is the same as that of the second cylinder, and the diameter of the first cylinder cavity is larger than that of the first cylinder.
4. A vented ultra-high pressure vessel in accordance with claim 3, wherein: the cylindrical transition section is arranged between the first cylinder and the second cylinder, the cylindrical transition section is in a round table shape, the cylindrical cavity transition section is arranged between the first cylindrical cavity and the second cylindrical cavity, and the cylindrical cavity transition section is matched with the cylindrical transition section in shape.
5. A vented ultra-high pressure vessel in accordance with claim 3, wherein: the side of the lower part of the second cylinder is provided with an ultrahigh pressure sealing piece (14).
6. A vented ultra-high pressure vessel in accordance with claim 3, wherein: the diameter of the first cylindrical cavity is larger than that of the first cylinder, and the difference value between the diameter of the first cylindrical cavity and the diameter of the first cylindrical cavity is 2 mm-5 mm.
7. A method for venting an ultra-high pressure vessel using an ultra-high pressure vessel capable of venting as defined in claim 3, characterized in that: the method comprises the following steps:
s1: firstly, driving a movable extending end of an oil cylinder (13) to move upwards to drive an end cap (11) of an exhaust end cap (1) to ascend, so that the lower end of a second cylinder of the end cap (11) is positioned in a first cylinder cavity of a container inner shell (21), and a gap exists between the second cylinder and the first cylinder cavity at the moment of exhaust;
s2: filling the medium (3) into the container inner shell (21) through the liquid filling hole (5) arranged in the middle of the container base (4) until the medium (3) is over the second cylinder, and at the moment, the second cylinder cavity in the container inner shell (21) is filled with the medium (3), and the container inner shell (21) finishes exhausting;
s3: the movable extending end of the driving oil cylinder (13) moves downwards to drive the end cap (11) of the exhaust end cap (1) to descend, the lower end of the second cylinder of the end cap (11) is positioned in the second cylinder cavity of the inner shell (21) of the container, after sealing is formed, the medium (3) is continuously filled for pressurization until the pressure in the inner shell (21) of the container reaches the rated working pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311035480.0A CN116771961B (en) | 2023-08-17 | 2023-08-17 | Extra-high pressure container capable of exhausting and exhausting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311035480.0A CN116771961B (en) | 2023-08-17 | 2023-08-17 | Extra-high pressure container capable of exhausting and exhausting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116771961A true CN116771961A (en) | 2023-09-19 |
| CN116771961B CN116771961B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311035480.0A Active CN116771961B (en) | 2023-08-17 | 2023-08-17 | Extra-high pressure container capable of exhausting and exhausting method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH056260U (en) * | 1991-07-08 | 1993-01-29 | 日新電機株式会社 | Pressure relief device |
| FR2702534A1 (en) * | 1993-03-08 | 1994-09-16 | Cnim | Device for venting pressurised vessels |
| CN205446750U (en) * | 2016-03-14 | 2016-08-10 | 宁波三安制阀有限公司 | Selection valve |
| CN209414709U (en) * | 2018-12-11 | 2019-09-20 | 四川航空工业川西机器有限责任公司 | A kind of super-pressure automatic draining device |
| CN112728080A (en) * | 2021-02-05 | 2021-04-30 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Ultrahigh pressure hydraulic container |
| CN217519200U (en) * | 2022-06-23 | 2022-09-30 | 青岛信泰压力容器有限公司 | Pressure vessel sealing cover |
-
2023
- 2023-08-17 CN CN202311035480.0A patent/CN116771961B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH056260U (en) * | 1991-07-08 | 1993-01-29 | 日新電機株式会社 | Pressure relief device |
| FR2702534A1 (en) * | 1993-03-08 | 1994-09-16 | Cnim | Device for venting pressurised vessels |
| CN205446750U (en) * | 2016-03-14 | 2016-08-10 | 宁波三安制阀有限公司 | Selection valve |
| CN209414709U (en) * | 2018-12-11 | 2019-09-20 | 四川航空工业川西机器有限责任公司 | A kind of super-pressure automatic draining device |
| CN112728080A (en) * | 2021-02-05 | 2021-04-30 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Ultrahigh pressure hydraulic container |
| CN217519200U (en) * | 2022-06-23 | 2022-09-30 | 青岛信泰压力容器有限公司 | Pressure vessel sealing cover |
Non-Patent Citations (1)
| Title |
|---|
| 朱玉峰, 张玉荣, 黄雪琴: "超高压容器在液压系统中的应用", 河北化工, no. 01, pages 27 - 28 * |
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| Publication number | Publication date |
|---|---|
| CN116771961B (en) | 2023-12-19 |
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