CN210712729U - Long-life high-pressure water shutoff rubber air bag - Google Patents
Long-life high-pressure water shutoff rubber air bag Download PDFInfo
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- CN210712729U CN210712729U CN201921209396.5U CN201921209396U CN210712729U CN 210712729 U CN210712729 U CN 210712729U CN 201921209396 U CN201921209396 U CN 201921209396U CN 210712729 U CN210712729 U CN 210712729U
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- 244000043261 Hevea brasiliensis Species 0.000 description 4
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- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
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- 239000011593 sulfur Substances 0.000 description 2
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Abstract
The utility model discloses a long-life high pressure water shutoff rubber gasbag relates to large-scale rubber products field. The air bag comprises a bag body (1), a flange (2), a lifting ring (3) and an inflation and deflation nozzle (4), wherein the bag body is cylindrical, the two ends of the bag body are circular arcs or flat circles and are respectively provided with the lifting ring and the flange, and the inflation and deflation nozzle is arranged at one end of the bag body; the bag body comprises an EPDM outer rubber layer containing OVP, a cord or steel wire framework layer, a middle rubber layer and a modified brominated butyl inner rubber layer. The utility model has the pressure resistance of the air bag of more than 1.2MPa and the service life of more than 50 years. The device is particularly suitable for high-pressure underwater or emergency repair and water plugging of urban pipelines, or ship launching in seawater, oil rigs and the like, and the application range is 120-meter deep water.
Description
Technical Field
The utility model relates to a long-life high pressure water shutoff rubber gasbag relates to the large-scale rubber products that the framework material is continuous high strength. The device is particularly suitable for high-pressure underwater or urban pipeline rush-repair water plugging, ship launching, oil drilling rigs and the like.
Background
High strength rubber products are often reinforced with fibrous skeletal materials. However, it is difficult to produce large rubber products, especially fully closed (reinforced skeleton fiber continuous) products, by one-time heat vulcanization with integral molding and integral pressurization.
Such as: makun et al discloses a "silicone rubber bladder molding method (CN 104972575B) for manufacturing an engine heat insulating layer", which is a technique of "preparing a mold and a corresponding silicone rubber green sheet according to the requirements of a bladder; then vulcanizing, bonding and secondary vulcanizing the straight cylinder section material, vulcanizing the end material, bonding and molding the straight cylinder section, sequentially bonding two ends of the straight cylinder section with the end, and vulcanizing to obtain the molded silicon rubber air bag'.
The production process is sectional vulcanization, the product quality is uniform and difficult to ensure, and the product is not reinforced by adopting a fiber framework material and has lower relative strength.
The xu jia faithful et al discloses a ship launching fiber reinforced rubber airbag and molding process (CN 105836072A), which is characterized in that: the core mould both ends bag head adopts the isostress structure, rubber gasbag utricule has rubber layer, fibre enhancement layer and protective layer three layer construction. The molding process comprises the following steps: firstly, winding and distributing a rubber belt on the surface of a core mold to form a rubber layer, and then, distributing dry fiber yarns on the surface of the rubber layer by a specific geodesic winding process to form a fiber reinforced layer; then winding a plurality of layers of rubber belts on the surface of the fiber reinforced layer to form a protective layer; and finally, vulcanizing and demolding the wound rubber airbag.
It does not solve the key problem, 1) the material of the mandrel; 2) how to fix the shape; 3) how to vulcanize; 4) and how to demould.
Houlinfang et al disclose a "method of processing a rubber airbag for an oil rig (CN 105836072A)", which is characterized in that: supplying water by a high-pressure pump to increase the internal pressure of the air bag, and vulcanizing for 50-70 minutes under the conditions that the temperature is 150 ℃ and the pressure is 2.5 Mpa; adopt the automatic mould of rubber gasbag on the vulcanizer ".
The problems are that: 1) the semi-finished tire preforming process does not adopt an inner mold, and the shape and the size of the semi-finished tire are difficult to ensure; 2) a bulky and costly air bag automated mold is used.
Disclosure of Invention
An object of the utility model is to provide a long-life high pressure water shutoff rubber gasbag under water relates to the large-scale rubber products that the framework material is continuous high strength. The utility model has the pressure resistance of more than 1.2MPa and the service life of more than 50 years. The device is particularly used for high-pressure underwater or urban pipeline rush-repair water plugging, or ship launching, oil drilling machines and the like.
The utility model aims at realizing through the following technical scheme:
a long-life high-pressure water plugging rubber air bag comprises a bag body, flanges, lifting rings and an air charging and discharging nozzle, wherein the bag body is cylindrical, the two ends of the bag body are circular arcs or flat circles and are respectively provided with the flanges and the two lifting rings, and the air charging and discharging nozzle is further arranged at one end of the bag body; the bag body comprises an OVP-containing EPDM outer rubber layer, a cord or steel wire framework layer which is crossly paved at an angle of 90 degrees and forms an angle of 46-56 degrees, a middle rubber layer which is formed by combining chloroprene rubber and natural rubber, and a maleic anhydride suspension grafting modified brominated butyl inner rubber layer.
The long-life high-pressure water plugging rubber air bag is characterized in that the maximum size of the air bag is as follows: the diameter Φ 4m × 11m long.
The curtain line or steel wire framework layer is formed by winding and rubberizing a plurality of layers of curtain lines or steel wire meshes at an angle of 46-56 degrees, the curtain lines or the steel wire meshes are paved at an angle of 90 degrees in a crossed manner, and middle rubber is hung on the two sides of each layer of the curtain lines or the steel wire meshes.
In the long-life high-pressure water shutoff rubber air bag, the cord is polyester or nylon cord; the steel wire layer is a 304 stainless steel mesh layer.
The utility model has the advantages and effects that:
the utility model adopts the structure of an inner rubber layer, a middle rubber layer, a framework layer and an outer rubber layer, and simultaneously, the reinforcing framework adopts a 46-56-degree angle winding rubberized cord or a steel wire mesh double-number layer (not less than 2 layers), and the 90-degree angle is crossed and laid, so that the stress of materials and products is uniform and flexible; the air bag has high compression strength (the use pressure reaches more than 1.2 MPa), the service life in seawater exceeds 50 years, and the environmental sanitation index exceeds the national standard and requires 4 orders of magnitude.
Drawings
FIG. 1 is a cross-sectional view of the airbag body of the present invention;
FIG. 2 is a diagram of the airbag of the present invention;
fig. 3 is an end view of the airbag product of the present invention.
Detailed Description
The present application will now be described in detail with reference to the accompanying drawings.
Fig. 1 is a cross-sectional view of the airbag body of the present invention, which can illustrate the relative position of each structural layer of the airbag body, marked as: 1A-outer glue layer, 1B-framework layer, 1C-middle glue layer and 1D-inner glue layer.
Fig. 2 is a diagram of the airbag product of the present invention, marked as: 1-bag body, 2-flange, 3-hanging ring and 4-charging and discharging nozzle;
fig. 3 is an end view of the airbag product of the present invention.
The utility model comprises a bag body 1, a flange 2, a lifting ring 3 and a charging and discharging nozzle 4; wherein, the bag body is cylindrical, both ends are circular arcs or flat circles and are provided with a flange 2 and two lifting rings 3, and one end is also provided with a charging and discharging nozzle 4; the bag body comprises an EPDM outer rubber layer 1A, a cord or steel wire framework layer 1B, a middle rubber layer 1C formed by combining neoprene and natural rubber, and a maleic anhydride suspension grafting modified brominated butyl inner rubber layer 1D.
Wherein, the outer glue film comprises the following components by mass: 100 parts of EPDM, 50 parts of carbon black N220, 10 parts of naphthenic oil, 5 parts of zinc oxide, 1 part of SA and 1 part of OVP, and 1-10 parts of a solvent.
The curtain wire or steel wire framework layer is formed by winding and gluing double layers of curtain wires or steel wire meshes at an angle of 46-56 degrees, and paving the curtain wires or the steel wire meshes at an angle of 90 degrees in a crossed manner, wherein the middle glue is hung on the double surfaces of each layer of the curtain wires or the steel wire meshes. The cord is polyester or nylon; the steel wire layer adopts 304 stainless steel net.
The maximum size of the air bag of the utility model is phi 4m (diameter) multiplied by 11m (length).
The utility model discloses gasbag preparation process is:
step 1: crushing waste paper with a paper crusher, soaking the waste paper in water in a container to prepare paste-like paper pulp; adhering a layer of paper on the cylindrical steel core, wherein one end of the cylindrical steel core is provided with an air nozzle hole, an inner sheet of the flange is added in advance, and pasty paper pulp is pasted on the inner sheet; naturally dehydrating and hardening at room temperature to obtain the cylindrical paper mould with inner flanges at two ends.
Step 2: plasticating, compounding, mixing and sheeting raw rubber
(2-1) EPDM outer rubber layer: according to the formula (mass portion), 100 portions of EPDM, 50 portions of carbon black N220, 10 portions of naphthenic oil, 5 portions of zinc oxide, 1 portion of SA and 1 to 10 portions of OVP. On an open mill, the following process procedures are carried out: raw rubber covered roller → zinc oxide, carbon black, stearic acid oil, OVP → accelerator, sulfur → mixing evenly → cooling lower piece (50-70 ℃/less than 27 minutes/roller speed ratio 1.05-1.2: 1) for standby.
The physical and mechanical properties of the vulcanized rubber are shown in Table 1, and the service life is as follows according to international standard ISO 11346: 1997, a hot air accelerated aging test at 70 ℃, 80 ℃ and 90 ℃ is carried out, the service life at 23 ℃ is extrapolated to 79.3 years (the safety coefficient is 2) according to the tensile property, and the food hygienic property is as shown in the table 2 according to the national standard GB 4806.1-94 hygienic Standard for rubber products for food.
(2-2) middle glue layer for combining neoprene glue and natural glue: according to the formula (mass parts), 50 parts of general chloroprene rubber, 50 parts of epoxy modified natural rubber, 50 parts of S, 1 part of TMTD, 1.5 parts of tetrapod-shaped zinc oxide whisker, 7 parts of BC, 40 parts of SA, 3 parts of naphthenic oil, 20 parts of TM808, 2 parts of magnesium oxide, 4 parts of old air, 4010, 1 part of antiager D, 1 part of tert-butyl phenol formaldehyde resin and 30 parts of tert-butyl phenol formaldehyde resin. On an open mill, the following process procedures are carried out: plasticating → compounding → mixing → high temperature reinforcement → low temperature crosslinking → lower piece for standby.
The physical and mechanical properties of the vulcanizate are shown in Table 3.
And (2-3) plasticating, matching, mixing and discharging the crude rubber of the maleic anhydride suspension graft modified brominated butyl rubber inner rubber layer for later use.
The properties of the vulcanized rubber materials were tested and are shown in Table 4.
And step 3: after the high-strength cord or steel wire mesh is dipped, the middle rubber layer rubber material is hung on the two sides of a quadruple calender to form raw rubber cloth for later use.
The physical properties of the composite rubberized fabrics were also tested and are shown in table 5.
And 4, step 4: after an inner rubber layer butyl film is laid on a paper mould, double layers (no less than 2 layers) of rubberized cord threads or steel wire meshes are wound according to an angle of 46-56 degrees, the cord threads or the steel wire meshes are crossed at an angle of 90 degrees and are laid, and non-rubber cord threads are left in two ends of a roller within 300mm and are subjected to pre-lapping treatment (the cord layers are separated by polypropylene films); integrally mounting a middle adhesive film, and cutting and bonding grooves at the butt joint of the films; the whole body is covered with an adhesive sheet, and the butt joint parts of the adhesive sheets are cut and adhered with grooves;
and 5: wrapping with pressurized water cloth, putting on a protective bag made of waterproof adhesive tape, and pressurizing in a vulcanizing tank at 0.6MPa/30 min; the pulp mould maintains an internal pressure of 0.63 MPa.
Step 6: after the vulcanization is finished at 150 ℃ for 30min, taking out, untying the water cloth to obtain a product containing the paper pulp mold, and introducing hot water into the product to remove the shredded paper pulp.
And 7: and installing an end flange, an air tap and a hanging ring.
The utility model discloses long-life high pressure water shutoff rubber gasbag is made promptly.
The test method comprises the following steps:
GB/T2941-2006 Standard temperature, humidity and time for environmental Conditioning and testing of rubber samples (eqv ISO 23529: 2004);
GB/T528-2009 determination of tensile stress strain Properties of vulcanized rubber or thermoplastic rubber (eqv ISO 37: 2005);
GB/T529-;
GB/T531.2-2009 "rubber pocket durometer indentation hardness test method" (idt ISO 7619-2: 2004);
GB/T3512-2001-accelerated aging and Heat resistance tests for vulcanized rubber or thermoplastic rubber in hot air (neq ISO 188: 2011);
GB/T7759-2015 compression set measurements of vulcanized rubber and thermoplastic rubber at Normal, high and Low temperatures (eqv ISO 815: 2008);
GB/T7762-;
GB/T9865.1-1996 preparation of samples and specimens of vulcanized or thermoplastic rubber first part: physical test (idt ISO 4461-1: 1993);
GB/T15256-;
ISO 11346：2014《Rubber, vulcanized or thermoplastic - Estimation oflife-time and maximum temperature of use from an Arrhenius plot》；
GB 4806.11-2016 rubber materials and products for food contact;
GB/T532-2008 determination of adhesion Strength of vulcanized rubber to Fabric (neq ISO 36: 2005);
HG/T2580-2008 "determination of tensile Strength and elongation at Break of rubber-or Plastic-coated fabrics" (eqv ISO1421: 1977);
ASTM D 3985-05 Standard Test Method for Oxygen Gas Transmission RateThrough Plastic Film and Sheeting Using a Coulometric Sensor1。
example 1
1) Manufacturing a disposable paper mould: crushing waste paper with a paper crusher, soaking the waste paper in water in a container to prepare paste-like paper pulp; adhering a layer of paper on a cylindrical steel core with the phi of 0.5m multiplied by 1m prepared in advance, wherein one end of the cylindrical steel core is provided with a small air nozzle hole, adding an inner sheet prepared with a flange in advance, and pasting pasty paper pulp on the inner sheet; naturally dehydrating and hardening at room temperature to obtain the cylindrical paper mould with inner flanges at two ends.
2) Preparing each layer of mixed rubber sheet:
(2-1) EPDM outer rubber layer: according to the formula (mass portion), 100 portions of EPDM, 50 portions of carbon black N220, 10 portions of naphthenic oil, 5 portions of zinc oxide, 1 portion of SA and 10 portions of OVP. On an open mill, the following process procedures are carried out: raw rubber covered roller → zinc oxide, carbon black, stearic acid oil, OVP → accelerator, sulfur → mixing evenly → cooling lower piece (50-70 ℃/less than 27 minutes/roller speed ratio 1.05-1.2: 1).
After vulcanization at 150 ℃ for 30min, the physical and mechanical properties are shown in Table 1, and the service life is as specified in International Standard ISO 11346: 1997, a hot air accelerated aging test at 70 ℃, 80 ℃ and 90 ℃ is carried out, the service life at 23 ℃ is extrapolated to 79.3 years (the safety coefficient is 2) according to the tensile property, and the food hygienic property is as shown in the table 2 according to the national standard GB 4806.1-94 hygienic Standard for rubber products for food.
(2-2) middle glue layer for combining neoprene glue and natural glue: according to the formula (mass parts), 50 parts of general chloroprene rubber, 50 parts of epoxy modified natural rubber, 50 parts of S, 1 part of TMTD, 1.5 parts of tetrapod-shaped zinc oxide whisker, 7 parts of BC, 40 parts of SA, 3 parts of naphthenic oil, 20 parts of TM808, 2 parts of magnesium oxide, 4 parts of old air, 4010, 1 part of antiager D, 1 part of tert-butyl phenol formaldehyde resin and 30 parts of tert-butyl phenol formaldehyde resin. On an open mill, the following process procedures are carried out: plasticating → compounding → mixing → high temperature reinforcement → low temperature crosslinking → lower piece.
The physical and mechanical properties after vulcanization at 150 ℃ for 30min are shown in Table 3.
And (2-3) plasticating, matching, mixing and discharging the crude rubber of the inner rubber layer of the maleic anhydride suspension graft modified brominated butyl rubber. The physical and mechanical properties after vulcanization at 150 ℃ for 30min are shown in Table 4.
3) Preparing a skeleton fiber layer: after the high-strength polyester cord is dipped in glue, a middle glue layer rubber material is hung on the two sides of a quadruple calender to prepare raw rubberized fabric.
4) After an inner rubber layer butyl film is laid on a paper mould, two layers of rubberized polyester cord threads are wound at an angle of 46-56 degrees, the cloth is crossed at an angle of 90 degrees, and non-rubber cord threads are respectively reserved within 300mm of two ends of a roller to be subjected to pre-lap joint treatment (each cord thread layer is separated by a polypropylene film); integrally arranging a middle glue layer rubber sheet, and cutting and bonding grooves at the butt joint of the rubber sheets; the whole body is covered with an adhesive sheet, and the butt joint parts of the adhesive sheets are cut and adhered with grooves;
5) wrapping with pressurized water cloth, putting on a protective bag made of waterproof adhesive tape, and pressurizing in a vulcanizing tank at 0.6MPa/30 min; the pulp mould maintains an internal pressure of 0.63 MPa.
6) After the vulcanization is finished at 150 ℃ for 30min, taking out, untying the water cloth to obtain a product containing the paper pulp mold, and introducing hot water into the product to remove the shredded paper pulp.
7) And mounting and preparing an end flange, an air tap and a lifting ring.
Namely, the rubber air bag for long-life and high-pressure water shutoff in seawater (underwater) with the diameter of phi 0.5m multiplied by 1m is manufactured.
Comparative example 1
The outer and inner layers of EPDM without OVP in the outer layer and without suspension graft modification of maleic anhydride of bromobutyl rubber were prepared as in example 1 with the vulcanizate physical and mechanical properties as in Table 1. It can be seen that: the EPDM outer rubber without the OVP has poor comprehensive performance, particularly wear resistance; the air impermeability of the bromobutyl rubber modified with suspension graft without maleic anhydride is significantly poorer than that of the modified bromobutyl rubber.
Comparative example 2
The carcass fiber layer was prepared by using plain woven polyester canvas instead of the polyester cord, and the carcass fiber layer was prepared as in example 1, and the physical and mechanical properties of the vulcanizate were as shown in Table 5. It can be seen that: plain woven polyester canvas is relatively dense and it is relatively difficult to "grab" the rubber on both sides of the skeletal fibers, resulting in a slightly lower bond strength between the rubber and the fabric.
Example 2
The amount of OVP used in the EPDM outer rubber layer was 1 part and the carcass fiber layer was a galvanized 304 stainless steel mesh (pore size 0.5-3mm, filament diameter 0.2-3 mm), and the outer rubber and carcass fiber layer were prepared as in example 1. The physical properties of the outer and outer gum and the coated fabric are shown in tables 6 and 7.
Example 3
The amount of OVP used in the EPDM outer layer was 5 parts and the nylon cord was used instead of the polyester cord to prepare the carcass fiber layer, and the outer layer and the carcass fiber layer were prepared as in example 1. The physical properties of the outer and outer gum and the coated fabric are shown in tables 6 and 7. It can be seen that: good results are still obtained.
Example 4
A4.0 m 10m long life underwater high pressure water shutoff rubber air bag was made from 2000D90 polyester cord as in example 1. The pressure resistance test is carried out by using an air compressor, and no pressure drop exists after 1.2MPa is multiplied by 24 hs.
TABLE 1 outer rubber layer Properties
Vulcanization conditions are as follows: multiplying by 150 ℃ for 30min
TABLE 2 inspection of outer rubber layer for food hygiene
Vulcanization conditions are as follows: multiplying by 150 ℃ for 30min
TABLE 3 Performance of the adhesive layer
Vulcanization conditions are as follows: multiplying by 150 ℃ for 30min
TABLE 4 inner bond Properties
Vulcanization conditions are as follows: multiplying by 150 ℃ for 30min
TABLE 5 physical Properties of the composite coated fabrics
The tensile strength of the composite colloid-coated fabric is not lower than that of the colloid-coated fabric
TABLE 6 outer rubber layer Properties
Vulcanization conditions are as follows: multiplying by 150 ℃ for 30min
TABLE 7 physical Properties of the composite coated fabrics
The tensile strength of the composite colloid-coated fabric is not lower than that of the colloid-coated fabric.
As can be seen from the results in the table and the detailed description:
1) the EPDM outer rubber containing the OVP has excellent comprehensive performance, and particularly, the processing performance, the mechanical property of the material and the wear resistance are improved;
2) the maleic anhydride suspension graft modified brominated butyl rubber is used as an inner rubber layer, so that the air tightness of the inner rubber layer is improved, and the outer rubber, the middle rubber and the inner rubber are well co-vulcanized;
3) the disposable paper mould is adopted, so that the one-step forming and vulcanization of a high-pressure and high-strength large seamless rubber product are met, and meanwhile, a complex process for taking out an inner mould is avoided;
4) the bag body adopts an inner glue layer, a middle glue layer, a framework layer and an outer glue layer, the reinforced framework adopts a curtain line or a steel wire mesh with an angle of 46-56 degrees for winding and hanging glue, and the curtain line or the steel wire mesh is alternately laid at an angle of 90 degrees, so that the material and the product are uniformly and flexibly stressed, and the use pressure of the product is improved;
5) the adoption of the water-coated cloth pressurizing mode enables the vulcanization process to be simpler and does not need an outer die;
6) the adhesive tape protecting bag is worn, so that the product can be prevented from contacting with water vapor, and the quality and the production stability of the product are prevented from being influenced;
7) the flange and the hanging ring facilitate the transportation and installation of the product, and the stress and the use pressure of the bag body are enhanced.
The production process of the utility model is simple and convenient to operate, can meet the one-step forming and vulcanization of high-pressure and high-strength large seamless rubber products, and has good production stability; the produced large rubber air bag has high compression strength (the use pressure reaches more than 1.2 MPa), the service life in seawater exceeds 50 years, and the environmental sanitation index exceeds the national standard and requires 4 orders of magnitude.
Meanwhile, a new economic growth point is formed, and the method has a reference function on the development of related theories of materials and large rubber products and the application of the materials, and has important social and economic benefits.
Claims (4)
1. A long-life high-pressure water shutoff rubber air bag is characterized in that; the air bag comprises a bag body (1), a flange (2), lifting rings (3) and an inflation and deflation nozzle (4), wherein the bag body is cylindrical, the two ends of the bag body are circular arcs or flat circles and are respectively provided with the flange (2) and the two lifting rings (3), and the inflation and deflation nozzle (4) is further arranged at one end of the bag body; the bag body comprises an outer rubber layer, a cord or steel wire framework layer which is crossly paved at an angle of 90 degrees and forms an angle of 46-56 degrees, a middle rubber layer and a maleic anhydride suspension grafting modified brominated butyl inner rubber layer.
2. A long life high pressure water shutoff rubber bladder as recited in claim 1, wherein; the maximum size of the air bag is as follows: the diameter Φ 4m × 11m long.
3. A long life high pressure water shutoff rubber bladder as recited in claim 1, wherein; the curtain wire or steel wire framework layer is formed by winding and gluing a plurality of layers of curtain wires or steel wire meshes at an angle of 46-56 degrees, the curtain wires or the steel wire meshes are crosswise laid at an angle of 90 degrees, and medium glue is hung on two sides of each layer of the curtain wires or the steel wire meshes.
4. A long life high pressure water shutoff rubber bladder as recited in claim 3, wherein; the cord is a polyester or nylon cord; the steel mesh is a 304 stainless steel mesh.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921209396.5U CN210712729U (en) | 2019-07-30 | 2019-07-30 | Long-life high-pressure water shutoff rubber air bag |
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|---|---|---|---|
| CN201921209396.5U CN210712729U (en) | 2019-07-30 | 2019-07-30 | Long-life high-pressure water shutoff rubber air bag |
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| CN210712729U true CN210712729U (en) | 2020-06-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359421A (en) * | 2019-07-30 | 2019-10-22 | 沈阳化大高分子材料研发中心有限公司 | A kind of long life high-voltage water blockoff rubber pneumatic bag and production technology |
| CN115303654A (en) * | 2022-06-27 | 2022-11-08 | 中国人民解放军海军勤务学院 | Underwater oil storage oil bag and device |
-
2019
- 2019-07-30 CN CN201921209396.5U patent/CN210712729U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359421A (en) * | 2019-07-30 | 2019-10-22 | 沈阳化大高分子材料研发中心有限公司 | A kind of long life high-voltage water blockoff rubber pneumatic bag and production technology |
| CN110359421B (en) * | 2019-07-30 | 2024-05-24 | 沈阳化大高分子材料研发中心有限公司 | Long-life high-pressure water shutoff rubber air bag and production process |
| CN115303654A (en) * | 2022-06-27 | 2022-11-08 | 中国人民解放军海军勤务学院 | Underwater oil storage oil bag and device |
| CN115303654B (en) * | 2022-06-27 | 2024-02-13 | 中国人民解放军海军勤务学院 | Underwater oil storage oil bag and device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Tieling Efan R & D Rubber and Plastic Co.,Ltd. Assignor: SHENYANG HUADA R & D CENTER OF POLYMER MATERIALS Co.,Ltd. Contract record no.: X2024210000002 Denomination of utility model: A long-life high-pressure water blocking rubber airbag Granted publication date: 20200609 License type: Common License Record date: 20240105 |
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| EE01 | Entry into force of recordation of patent licensing contract |