CN114542941B - Polyurethane high-pressure gas storage tank liner and forming process thereof - Google Patents
Polyurethane high-pressure gas storage tank liner and forming process thereof Download PDFInfo
- Publication number
- CN114542941B CN114542941B CN202011341748.XA CN202011341748A CN114542941B CN 114542941 B CN114542941 B CN 114542941B CN 202011341748 A CN202011341748 A CN 202011341748A CN 114542941 B CN114542941 B CN 114542941B
- Authority
- CN
- China
- Prior art keywords
- storage tank
- pressure gas
- polyurethane
- gas storage
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/005—Storage of gas or gaseous mixture at high pressure and at high density condition, e.g. in the single state phase
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
- B29C41/06—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould about two or more axes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/46—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/52—Measuring, controlling or regulating
-
- 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
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Abstract
The invention discloses a polyurethane high-pressure gas storage tank liner which is integrally formed and is made of polyurethane. Preferably an aqueous polyurethane material. In the invention, the inner container of the polyurethane high-pressure gas storage tank is integrally formed by a rotational molding process. The invention also provides a forming process of the polyurethane high-pressure gas storage tank liner, a rotational molding method is used, and the crosslinking reaction of polyurethane is completed in the rotational molding process. The inner container of the polyurethane high-pressure gas storage tank can realize effective blocking of hydrogen, and has higher wear resistance, tensile strength, tearing strength, shock absorption effect and high adhesion with metal fittings than nylon and polyethylene materials.
Description
Technical Field
The invention belongs to the field of gas storage tanks, and particularly relates to a polyurethane high-pressure gas storage tank liner and a forming process thereof.
Background
The existing high-pressure gas storage tank inner container is generally an aluminum inner container, and is processed by adopting a seamless aluminum pipe high-temperature head shrinking process, then heat treatment and drilling. The aluminum is easy to generate hydrogen embrittlement, and has low pressure resistance, heavy weight and complex production process.
At present, the high-pressure gas storage tank liner is produced by an injection molding process in Japan, and is usually made of polyethylene or nylon materials, and compared with an aluminum liner, the high-pressure gas storage tank liner has the advantages of good barrier property, light weight, long service life and the like. In order to have high barrier property and high structural strength, the technology adopted at present is split injection molding, and then the split injection molding is carried out to glue the liner into a whole, and the liner is provided with a butt joint gap which is easy to crack, so that the product quality and the service life are influenced.
In addition, the inner container of the air storage tank integrally formed by rotational molding is generally two layers at present, and consists of a polyethylene outer layer and a nylon inner layer; nylon provides high barrier properties and crosslinked polyethylene is used to increase the structural strength of brittle nylon. The forming process of the inner container of the gas storage tank is complex and sensitive to temperature, and the polyethylene and nylon are poor in adhesion degree with metal joints at exhaust ports at two ends and are easy to be bonded firmly; and because the material has no polarity, the carbon fiber wound with the outer wall of the material is not firmly bonded.
At present, the single-layer high-pressure gas storage tank liner with high barrier property, high wear resistance and high structural strength has not been produced in the market.
Disclosure of Invention
The invention provides a polyurethane high-pressure gas storage tank liner and a forming process thereof, aiming at the defects of the prior art, the polyurethane is used as the material to obtain the integrally formed high-pressure gas storage tank, the hydrogen can be effectively blocked, and the wear resistance, the tensile strength, the tearing strength, the damping effect and the high adhesion with metal fittings which are higher than those of nylon and polyethylene materials are obtained. The invention also provides a molding process of the high-pressure gas storage tank, a rotational molding method is used, and the crosslinking reaction of polyurethane is completed in the rotational molding process.
The specific technical scheme is as follows:
one of the objectives of the present invention is to provide a polyurethane high-pressure gas storage tank liner, which is integrally formed and made of polyurethane. Preferably a waterborne polyurethane material.
In the invention, the inner container of the polyurethane high-pressure gas storage tank is integrally formed by a rotational molding process.
Further, the polyurethane high-pressure gas storage tank liner can block hydrogen and serve as a high-pressure hydrogen storage tank liner.
The integrally formed gas storage cylinder liner obtained by the rotational molding process can effectively block hydrogen and is suitable for being used as a high-pressure hydrogen storage tank liner; the wear resistance, the tensile strength, the tearing strength and the shock absorption effect are better than those of the liner made of nylon and polyethylene materials in terms of adhesion with metal accessories; and when the hardness is more than A85, the elasticity can be still kept, which is obviously superior to nylon. The invention solves the problems that the existing nylon liner has high brittleness and needs an external polyethylene layer to increase the structural strength, and ideal barrier effect and structural strength can be simultaneously obtained by a single layer. In addition, the bonding strength of the polyurethane material and the aluminum alloy joint at the exhaust port is obviously superior to that of nylon and polyethylene.
Further, the thickness of the liner of the polyurethane high-pressure gas storage tank is 3-5mm. The thickness of the liner is less than 6-8mm of the nylon liner.
The invention also aims to provide a forming process of the polyurethane high-pressure gas storage tank liner.
A forming process of an inner container of a polyurethane high-pressure gas storage tank is characterized by comprising the following steps:
(1) Mixing polyurethane synthetic raw materials;
(2) Heating a high-pressure gas storage tank liner forming die of rotational molding equipment to 80-120 ℃, and then injecting the feed liquid obtained in the step (1) into the forming die;
(3) Maintaining the temperature of the forming die in the step (2), controlling the forming die of the inner container of the gas cylinder to rotate along a horizontal shaft and a vertical shaft at the same time, reacting for 5-10min at the rotating speed of 5-50r/min along the horizontal shaft and 5-50r/min along the vertical shaft, then maintaining the temperature of 80-120 ℃, continuing heating for 50-90min, and cooling; and (5) after cooling to the normal temperature, opening the forming die, and taking down the inner container of the high-pressure gas storage tank.
Specifically, in the step (3), the cross-linking reaction is basically completed by rotating the mold for 5-10min, at this time, the material can be continuously rotated for 50-90min in the mold maintaining the original heating temperature, and the mold can also be stopped; alternatively, the mold may be removed and heated in another manner to maintain the temperature between 80-120 ℃. The specific operation can be flexibly arranged according to the production condition.
In particular, the temperature at which the material is formed in the mold is dependent on the composition of the prepolymer and does not limit the process of the present invention. The method can be realized in the range of not influencing the normal crosslinking reaction of the prepolymer, and the prior common prepolymer is preferably 80-120 ℃.
The invention produces the integrated polyurethane high-pressure gas storage tank liner by a rotational molding method, so that the rapid crosslinking reaction of polyurethane is generated in the rotational molding stage after injection molding.
The mold is heated from the outside. When the forming die is heated, a temperature difference is formed between the inner wall of the forming die and the inner cavity, and the material liquid close to the inner wall is subjected to rapid crosslinking reaction due to high temperature and is hardened to form a thin layer; the temperature in the cavity is gradually reduced from the inner wall inwards according to the temperature difference, the reaction speed is also gradually reduced, and therefore, the hardened layer is gradually thickened along with the rotation of the forming die until the hardened layer is completely hardened. The uniformity of the wall thickness of the liner affects the barrier property and the pressure bearing capacity, so the balance of the reaction speed is very important. The invention can ensure the reaction speed to be balanced and form the inner container layer with uniform thickness and texture.
Further, in the step (3), the molding die is preferably heated by hot air.
In research and development, the invention discovers that the forming die is placed in an oven or a drying room and heated by hot air, so that the product can obtain better parameters compared with the direct heating of an electric heating pipe, and particularly obtain better air pressure bearing capacity. The mechanism is that the hot air can form a temperature gradient from the outer wall to the inner wall and then to the inner cavity, so that the temperature gradient is more stable and is not easily influenced by the constant-temperature heating stability of the heater. When the rated temperature is reached, the heater stops or turns to low-power operation, or starts again and increases power, the temperature of the hot air can not drop suddenly, and the heat is conducted from the heater to the hot air and then to the inner container. Therefore, the temperature of the inner wall and the inner cavity of the inner container is more stable, the temperature change speed is slower, and the temperature change amplitude is smaller. In addition, under the condition that a plurality of groups of forming molds work simultaneously, the energy consumption is lower by using hot air for heating.
Further, the working conditions of the step (1) are as follows:
taking a polyurethane prepolymer as a material A; taking polyhydric alcohol as material B; and (3) feeding and mixing the material A and the material B at the same time, maintaining the temperature at 35-50 ℃ in the mixing process, and stirring and feeding at the temperature of 35-50 ℃ until the feeding is finished.
And further, in the step (1), the material A and the material B are respectively placed under vacuum condition at 35-50 ℃ before feeding. Preferably, the vacuum degree is-0.1 to-0.08 MPa (gauge pressure) and the standing time is more than 30 min.
Still further, in the step (1), the polyhydric alcohol is butanediol.
Further, in the step (1), the mass ratio of the material A to the material B is 100: (9-30).
Further, heating the inner container of the high-pressure gas storage tank obtained in the step (3) at the temperature of 60-100 ℃ for 2-3h.
Specifically, the high-pressure gas storage tank inner container obtained in the step (3) can be placed in an oven at the temperature of 60-100 ℃ to further strengthen crosslinking and further increase the strength of the inner container.
The invention has the following beneficial effects:
1. the invention can obtain ideal gas barrier property only by single-layer polyurethane with the thickness of 3-5mm, and particularly has good barrier property to hydrogen.
2. The liner has better wear resistance, tensile strength, tearing strength, shock absorption effect and metal adhesion than nylon and polyethylene liners, has excellent air pressure bearing capacity, and can reach the pressure bearing capacity of 700kg/cm under the condition of externally winding carbon fibers 2 (ii) a The hardness is above A85 and still can keep elasticity.
3. The invention has low forming temperature and easy control of production process, and avoids the problems of high forming temperature, large thermal expansion and easy embrittlement of the common resin liner.
4. The invention uses polyurethane, especially water polyurethane material, and the bonding strength between the polyurethane and the metal joint of the mould and the externally wound carbon fiber is obviously superior to that of the common resin liner.
5. The equipment and the operation process are simple, and the energy consumption is lower than that of the prior art.
6. The cost of the raw materials of the invention is lower than that of the prior resin liner.
Detailed Description
The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
The specific implementation mode can be realized by using the high-pressure hydrogen storage tank liner forming device disclosed in the invention patent application with the application publication number of CN 109571835A.
The polyurethane prepolymer used in the embodiment is a prepolymer 373 purchased from smoke bench research polyurethane technology ltd.
Example 1
Taking the preparation of the inner container of the hydrogen storage tank as an example, the forming process of the inner container of the polyurethane high-pressure gas storage tank comprises the following steps:
(1) Taking a polyurethane prepolymer as a material A; taking butanediol as a material B; the mass ratio of the material A to the material B is 100:20; respectively storing the material A and the material B in a vacuum bin with vacuum degree of minus 0.1MPa (gauge pressure) and temperature of 35 ℃ for more than 30 min; mixing the material A and the material B while feeding, maintaining the temperature at 35 ℃ in the mixing process, and continuously stirring until the feeding is finished;
(2) Electrifying and heating a heating pipe for heating a high-pressure gas storage tank liner forming die to maintain the die at 115 ℃, and then injecting the feed liquid obtained in the step (1) into the forming die;
(3) Maintaining the temperature of the forming die in the step (2), controlling the forming die of the inner container of the gas cylinder to rotate along a horizontal axis (x axis) and a vertical axis (y axis) simultaneously, controlling the rotating speed along the horizontal axis to be 5r/min and the rotating speed along the vertical axis to be 15r/min, and reacting for 10min; maintaining the temperature, heating for 50min, and cooling to room temperature; opening the forming die, and taking down the inner container of the high-pressure gas storage tank;
(4) And (4) placing the inner container of the high-pressure gas storage tank obtained in the step (3) in an oven at the temperature of 80 ℃ for 2 hours.
Example 2
The difference from the embodiment 1 is that in the step (3), the electric heating pipe is not opened, the pressure gas storage tank inner container forming die is placed in a drying room, and hot air at the temperature of 115 ℃ is used for heating;
the remaining technical features are the same as in example 1.
Example 3
Taking the preparation of the inner container of the hydrogen storage tank as an example, the forming process of the inner container of the polyurethane high-pressure gas storage tank comprises the following steps:
(1) Taking a polyurethane prepolymer as a material A; taking butanediol as a material B; the mass ratio of the material A to the material B is 100:10; respectively storing the material A and the material B in a vacuum bin with vacuum degree of minus 0.1MPa (gauge pressure) and 40 ℃ for more than 30 min; mixing the material A and the material B while feeding, maintaining the temperature at 40 ℃ in the mixing process, and continuously stirring until the feeding is finished;
(2) Electrifying and heating a heating pipe for heating a high-pressure gas storage tank liner forming die to maintain the die at 115 ℃, and then injecting the feed liquid obtained in the step (1) into the forming die;
(3) Maintaining the temperature of the forming die in the step (2), controlling the forming die of the inner container of the gas cylinder to rotate along a horizontal axis (x axis) and a vertical axis (y axis) simultaneously, controlling the rotating speed along the horizontal axis to be 10r/min and the rotating speed along the vertical axis to be 30r/min, and reacting for 6min; maintaining the temperature, heating for 80min, and cooling to normal temperature; and opening the forming die and taking down the inner container of the high-pressure gas storage tank.
(4) And (4) placing the inner container of the high-pressure gas storage tank obtained in the step (3) in an oven at the temperature of 80 ℃ for 2 hours.
Example 4
Taking the preparation of the inner container of the hydrogen storage tank as an example, the forming process of the inner container of the polyurethane high-pressure gas storage tank comprises the following steps:
(1) Taking a polyurethane prepolymer as a material A; taking butanediol as a material B; the mass ratio of the material A to the material B is 100:25; respectively storing the material A and the material B in a vacuum bin with the vacuum degree of minus 0.1MPa (gauge pressure) and the temperature of 50 ℃ for more than 30 min; mixing the material A and the material B while feeding, maintaining the temperature at 50 ℃ in the mixing process, and continuously stirring until the feeding is finished;
(2) Electrifying and heating a heating pipe for heating a high-pressure gas storage tank liner forming die to maintain the die at 115 ℃, and then injecting the feed liquid obtained in the step (1) into the forming die;
(3) Maintaining the temperature of the forming die in the step (2), controlling the forming die of the inner container of the gas cylinder to rotate along a horizontal axis (x axis) and a vertical axis (y axis) simultaneously, controlling the rotating speed along the horizontal axis to be 5r/min and the rotating speed along the vertical axis to be 15r/min, and reacting for 8min; maintaining the temperature, heating for 50min, and cooling to normal temperature; and opening the forming die and taking down the inner container of the high-pressure gas storage tank.
(4) And (4) placing the inner container of the high-pressure gas storage tank obtained in the step (3) in a 60 ℃ drying oven for 3 hours.
Experiment 1
Comparative example 2, adhesion of polyethylene, nylon and aluminum alloy.
The aluminum alloy bonding piece made of the polyurethane material in the embodiment 2 is taken out and immersed in liquid nitrogen at the temperature of-196 ℃ for 15 minutes after being baked at the temperature of 40 ℃ for 15 minutes, and after the cold-hot alternation is repeated for 5 times, the shear strength at the temperature of room temperature to 196 ℃ is tested to be unchanged.
Adhering polyethylene and nylon with aluminum alloy at 220 deg.C, soaking in liquid nitrogen at-196 deg.C for 15min, repeating cold and heat alternation for 5 times, and delaminating.
Experiment 2
The energy consumption of the polyurethane hydrogen storage tank obtained in example 2 was compared with the energy consumption of nylon and polyethylene production processes, and the results are shown in table 1.
TABLE 1 comparison of energy consumption during production
| Material | Heating temperature (. Degree.C.) | Time (min) | Energy consumption (big card) |
| Polyethylene (PE) | 220 | 22 | 15 ten thousand |
| Nylon | 240 | 26 | 18 ten thousand |
| Polyurethane | 115 | 10 | 4 ten thousand |
As can be seen from Table 1, the energy consumption of the present invention is much lower than that of the hydrogen storage tank made of polyethylene and nylon.
Experiment 3
The hydrogen storage tanks made of polyurethane elastomers obtained in each example and each comparative example were compared with those made of nylon and high-density polyethylene in terms of abrasion values. The abrasion conditions were: CS17 round, 1000 g/round, 5000r/min,23 ℃. The results are shown in Table 2.
Table 2 abrasion value to abrasion value comparison
| Material | Abrasion/mg |
| Example 1 | 3.8 |
| Example 2 | 3.5 |
| Example 3 | 3.7 |
| Example 4 | 3.7 |
| Nylon | 49 |
| High density polyethylene | 29 |
As can be seen from table 2, the abrasion of the hydrogen storage tank of the present invention is much lower than that of the hydrogen storage tank made of nylon and polyethylene, wherein example 2 is the most preferred example.
Experiment 4
The hydrogen storage tanks made of the polyurethane elastomer materials obtained in the examples and the comparative examples were compared with nylon and high-density polyethylene in terms of mechanical properties. The experimental method refers to QB1040-79, and the experimental results are shown in Table 3.
TABLE 3 comparison of mechanical Properties
| Material | Tensile Strength (MPa) | Elongation (%) | Hardness of |
| Polyethylene | 35 | 410 | 90 |
| Nylon | 32 | 290 | 95 |
| Example 1 | 57 | 350 | 95 |
| Example 2 | 59.5 | 350 | 95 |
| Example 3 | 56 | 345 | 95 |
| Example 4 | 56.5 | 346.8 | 95 |
As can be seen from Table 3, the tensile strength of the polyurethane hydrogen storage tank obtained by the invention is significantly better than that of polyethylene and nylon materials. Among them, the embodiment 2 is the most preferable embodiment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A polyurethane high-pressure gas storage tank liner is characterized in that the liner is integrally formed and made of polyurethane and is formed through a rotational molding process; the thickness of the liner of the polyurethane high-pressure gas storage tank is 3-5mm, and the polyurethane is single-layer polyurethane;
the forming process of the polyurethane high-pressure gas storage tank liner comprises the following steps:
(1) Mixing polyurethane synthetic raw materials;
(2) Heating a high-pressure gas storage tank liner forming die of rotational molding equipment to 80-120 ℃, and then injecting the feed liquid obtained in the step (1) into the forming die;
(3) Maintaining the temperature of the forming die in the step (2), controlling the forming die of the inner container of the gas cylinder to rotate along a horizontal shaft and a vertical shaft at the same time, reacting for 5-10min at the rotating speed of 5-50r/min along the horizontal shaft and 5-50r/min along the vertical shaft, then continuously maintaining the temperature of 80-120 ℃, heating for 50-90min, and cooling; opening the forming die, and taking down the inner container of the high-pressure gas storage tank;
the working conditions of the step (1) are as follows: taking a polyurethane prepolymer as a material A; taking polyhydric alcohol as material B; feeding and mixing the material A and the material B, keeping the temperature at 35-50 ℃ in the mixing process, and stirring and feeding the materials at the temperature of 35-50 ℃ until the feeding is finished; the material A and the material B are respectively placed under the vacuum condition of 35-50 ℃ before feeding;
And (4) heating the inner container of the high-pressure gas storage tank obtained in the step (3) at the temperature of 60-100 ℃ for 2-3h.
2. The polyurethane high-pressure gas storage tank liner as claimed in claim 1, which can be used as a high-pressure hydrogen storage tank liner.
3. A forming process of a polyurethane high-pressure gas storage tank liner, which is characterized in that the polyurethane high-pressure gas storage tank liner is the polyurethane high-pressure gas storage tank liner of any one of claims 1-2, and comprises the following steps:
(1) Mixing polyurethane synthetic raw materials;
(2) Heating a liner forming die of a high-pressure gas storage tank of rotational molding equipment to 80-120 ℃, and then injecting the feed liquid obtained in the step (1) into the forming die;
(3) Maintaining the temperature of the forming die in the step (2), controlling the forming die of the inner container of the gas cylinder to rotate along a horizontal shaft and a vertical shaft at the same time, reacting for 5-10min at the rotating speed of 5-50r/min along the horizontal shaft and 5-50r/min along the vertical shaft, then continuously maintaining the temperature of 80-120 ℃, heating for 50-90min, and cooling; and opening the forming die and taking down the inner container of the high-pressure gas storage tank.
4. The molding process according to claim 3, wherein the working conditions of step (1) are:
taking a polyurethane prepolymer as a material A; taking polyhydric alcohol as material B; and (3) feeding and mixing the material A and the material B at the same time, maintaining the temperature at 35-50 ℃ in the mixing process, and stirring and feeding at the temperature of 35-50 ℃ until the feeding is finished.
5. The molding process according to claim 4, wherein in step (1), the material A and the material B are placed under vacuum at 35-50 ℃ respectively before being charged.
6. The molding process according to claim 4, wherein in the step (1), the polyol is butanediol.
7. The molding process according to any one of claims 4 to 6, wherein in the step (1), the mass ratio of the material A to the material B is 100: (9-30).
8. The molding process according to any one of claims 3 to 6, wherein in the step (3), the molding die is heated using hot air.
9. The molding process according to any one of claims 3 to 6, wherein the high-pressure gas tank inner container obtained in step (3) is subjected to heat treatment at 60 to 100 ℃ for 2 to 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011341748.XA CN114542941B (en) | 2020-11-25 | 2020-11-25 | Polyurethane high-pressure gas storage tank liner and forming process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011341748.XA CN114542941B (en) | 2020-11-25 | 2020-11-25 | Polyurethane high-pressure gas storage tank liner and forming process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114542941A CN114542941A (en) | 2022-05-27 |
| CN114542941B true CN114542941B (en) | 2023-01-31 |
Family
ID=81659864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011341748.XA Active CN114542941B (en) | 2020-11-25 | 2020-11-25 | Polyurethane high-pressure gas storage tank liner and forming process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114542941B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254635A (en) * | 2007-01-12 | 2008-09-03 | 马俊亮 | Solar water heater tank inner container |
| JP2011027218A (en) * | 2009-07-28 | 2011-02-10 | Toyota Motor Corp | Method of manufacturing pressure vessel and pressure vessel |
| JP2011245740A (en) * | 2010-05-27 | 2011-12-08 | Toyota Motor Corp | Apparatus and method for manufacturing high pressure tank |
| CN206527960U (en) * | 2017-03-06 | 2017-09-29 | 上海唯赛勃环保科技股份有限公司 | Rotational moulding inner bag reshaping device and Plastic Rolling Molds |
| WO2020002462A1 (en) * | 2018-06-26 | 2020-01-02 | Plastic Omnium Advanced Innovation And Research | Composite pressure vessel with reinforced inner liner and process for the production thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7867589B2 (en) * | 2007-07-20 | 2011-01-11 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Hybrid cryogenic tank construction and method of manufacture therefor |
-
2020
- 2020-11-25 CN CN202011341748.XA patent/CN114542941B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254635A (en) * | 2007-01-12 | 2008-09-03 | 马俊亮 | Solar water heater tank inner container |
| JP2011027218A (en) * | 2009-07-28 | 2011-02-10 | Toyota Motor Corp | Method of manufacturing pressure vessel and pressure vessel |
| JP2011245740A (en) * | 2010-05-27 | 2011-12-08 | Toyota Motor Corp | Apparatus and method for manufacturing high pressure tank |
| CN206527960U (en) * | 2017-03-06 | 2017-09-29 | 上海唯赛勃环保科技股份有限公司 | Rotational moulding inner bag reshaping device and Plastic Rolling Molds |
| WO2020002462A1 (en) * | 2018-06-26 | 2020-01-02 | Plastic Omnium Advanced Innovation And Research | Composite pressure vessel with reinforced inner liner and process for the production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114542941A (en) | 2022-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101948327B (en) | Method for preparing work hardening insulation quilt for high temperature furnace | |
| CN111170756B (en) | Preparation method of revolving body carbon/carbon composite material | |
| CN109469816B (en) | Composite material shell and preparation method thereof | |
| CN109624351B (en) | Preparation method of pre-impregnated fiber bundles for three-dimensional weaving | |
| CN114542941B (en) | Polyurethane high-pressure gas storage tank liner and forming process thereof | |
| CN109282139B (en) | Composite material gas cylinder and preparation method thereof | |
| CN106907530A (en) | A kind of inner lining plastic tube metal tube and its manufacture method | |
| CN112479731A (en) | Preparation method of carbon fiber sewing hardening heat-insulation material | |
| CN110240783A (en) | A kind of preparation method of low deformation big L/D ratio roller | |
| CN114110413B (en) | Carbon fiber composite material thick-wall gas cylinder and preparation method thereof | |
| CN111333963A (en) | High-pressure-resistance rubber pipe and preparation method and application thereof | |
| CN109707989B (en) | Composite material spherical gas cylinder and preparation method thereof | |
| CN109282137B (en) | High-temperature and high-pressure resistant polyimide composite material gas cylinder and preparation method thereof | |
| CN113446510A (en) | Large-diameter seamless steel inner container circumferential winding gas cylinder and manufacturing method thereof | |
| CN115141029B (en) | Preparation method of carbon/carbon crucible support rod | |
| CN112961394B (en) | Preparation method of degradable bamboo fiber straw | |
| CN112157399B (en) | Finish machining process for hub shaft of new energy automobile | |
| CN114436670A (en) | Winding forming-based high-strength carbon-carbon cylinder preparation method | |
| CN109282138A (en) | A kind of composite polyimide material gas cylinder and preparation method thereof | |
| CN111363447A (en) | Polyether ether ketone based composite coating applied to surface of mechanical part | |
| CN116330555A (en) | Production method of high-temperature plastic liner of high-pressure hydrogen storage bottle | |
| Kim | Prototype product based on the functional test of ANG fuel vessel applied to composite carbon fiber | |
| CN111271526A (en) | Antibacterial composite pipe and preparation method thereof | |
| CN115872766B (en) | Preparation method of carbon-carbon material heat preservation device and heat preservation device | |
| CN111593295B (en) | Surface treatment method for working cylinder of shock absorber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |