Manufacturing method of air storage bag of gravity compressed air energy storage system and air storage bag

Abstract

The invention discloses a manufacturing method of an air storage bag of a gravity compressed air energy storage system and the air storage bag. The manufacturing method comprises the following steps: sewing a base material bag: selecting a plurality of fabric base materials, intermeshing at least one of the fabric base materials to form a knitted shape, and sewing the woven base materials to form the base material bag; leveling the base material bag: washing the sewed base material bag, and then tentering and leveling the base material bag; coating the base material bag: coating and fixing the leveled base material bag; and rolling the base material bag: drying the coated base material bag in a high-low temperature change environment, and then rolling and flattening the base material bag at normal temperature to form the air storage bag. According to the manufacturing method of the air storage bag of the gravity compressed air energy storage system and the air storage bag, the internal bearing pressure is not smaller than 5.8 MPa, the anti-cracking strength is not smaller than 58 MPa, the number of times of deflection is not smaller than 30000, the problem that the gravity compressed air energy storage system is affected by geographical environment factors is solved, and the air storage bag has the advantages of being long in service life and high in flexibility.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage power generation, and in particular to a method for manufacturing an air storage bag of a gravity compressed air energy storage system and the air storage bag. Background Art

[0002] The compressed air energy storage system is an energy storage system based on gas turbine technology. Its working principle is that during the low electricity consumption period, the air is compressed and stored in the air storage chamber, so that the electrical energy is converted into the internal energy of the air and stored; during the peak electricity consumption period, the high-pressure air is released from the air storage chamber, enters the gas turbine combustion chamber for combustion, and then drives the turbine to generate electricity. The traditional compressed air energy storage system has the advantages of large energy storage capacity, long energy storage cycle, high efficiency and relatively small investment. The key technologies of the compressed air energy storage system include high-efficiency compressor technology, expander technology, combustion chamber technology, heat storage technology, gas storage technology and system integration and control technology. However, there are many problems with the compressed air system at present. The most important of these is that the construction of the compressed air system requires special geographical conditions as a large gas storage chamber, such as rock caves with high air tightness, salt caves, abandoned mines, etc. This limitation is one of the important factors affecting the promotion of this technology.

[0003] CN113550803A discloses a gravity compressed air energy storage gas storage device and method thereof. The device of the invention includes a vertical shaft, a gravity pressure block and an air storage bag arranged in the vertical shaft from top to bottom, and an air intake sealing valve and an exhaust sealing valve arranged at the bottom of the vertical shaft; the air storage bag is wrapped and arranged on the outside of the air intake sealing valve and the exhaust sealing valve, and a gravity pressure block is arranged on the top of the air storage bag. The invention effectively solves the problem that compressed air depends on the geographical location, has low energy storage density, and cannot perform work to the outside constantly. For micro-compressed air energy storage systems, ground high-pressure gas storage containers can be used to get rid of the dependence on gas storage caves. The air storage bag is a key device in the air storage device of the invention. If the air storage bag does not have the characteristics of high sealing, high pressure resistance, high flexibility, etc., it still cannot solve the problem of constant external work. Summary of the invention

[0004] In view of the fact that the above-mentioned existing method for manufacturing the air storage bag of the gravity compressed air energy storage system has the problems of poor airtightness, low pressure resistance and low deflection of the prepared air storage bag, the present invention is proposed.

[0005] Therefore, the present invention provides a method for manufacturing an air storage bag of a gravity compressed air energy storage system, the purpose of which is to solve the technical problems of poor airtightness, low pressure resistance and low deflection of the prepared air storage bag.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: including sewing substrate bags, flattening substrate bags, coating substrate bags, and rolling substrate bags.

[0007] Among them, sewing the substrate bag: selecting a plurality of fabric substrates, knitting at least one of the fabric substrates together, and sewing the woven substrates to form the substrate bag.

[0008] Flattening the substrate bag: The sewn substrate bag is washed and then flattened by stretching.

[0009] Coating substrate bags: coating and fixing the leveled substrate bags.

[0010] Rolling substrate bag: The coated substrate bag is dried in a high and low temperature changing environment, and then rolled flat at room temperature to form an air storage bag.

[0011] As a preferred solution of the method for manufacturing the air storage bag of the gravity compressed air energy storage system described in the present invention, the woven substrate bag has a model of 1k and a thickness of 1.2-1mm.

[0012] As a preferred solution of the method for manufacturing the air storage bag of the gravity compressed air energy storage system of the present invention, wherein: the warp density of the substrate bag is 150 pieces / 10mm, the weft density is 155 pieces / 10mm, and the gram weight is 200-800g / m 2 .

[0013] As a preferred solution of the method for manufacturing the air storage bag of the gravity compressed air energy storage system of the present invention, the diameter of the substrate bag structure is 1-10m and the height is 5-20m.

[0014] As a preferred solution of the method for manufacturing the air storage bag of the gravity compressed air energy storage system described in the present invention, the sewn substrate bag is flattened and ironed by a hot roller rolling method, and the heat treatment temperature of the hot roller rolling method is 40-50°C.

[0015] As a preferred solution of the method for manufacturing the air storage bag of the gravity compressed air energy storage system described in the present invention, the coating method includes single-sided coating and double-sided coating.

[0016] As a preferred solution of the method for manufacturing the air storage bag of the gravity compressed air energy storage system described in the present invention, the viscosity of the coated glue is 3000±500cps.

[0017] As a preferred solution of the method for manufacturing the air storage bag of the gravity compressed air energy storage system of the present invention, the fixing method is as follows: the coated substrate bag is placed in an environment of 60-120°C and cured for 30 minutes.

[0018] As a preferred scheme of the method for manufacturing the air storage bag of the gravity compressed air energy storage system described in the present invention, the high and low temperature changes are: from room temperature to -20°C at a rate of 10°C / min, and then maintained for 60-70 minutes, and then heated to 50°C at a rate of 10°C / min, and maintained for 60-70 minutes.

[0019] The beneficial effects of the present invention are as follows: the air storage bag formed by the above method has the characteristics of high airtightness, high pressure resistance, high flexibility, etc., which can effectively solve the technical problems that the compressed air of the gravity compressed air energy storage system depends on the geographical location, and the energy storage density of the gravity compressed air energy storage system is low and difficult to be widely used; at the same time, for the micro-gravity compressed air energy storage system, ground high-pressure air storage containers can be used to get rid of the dependence on air storage caves.

[0020] Another object of the present invention is to provide an air storage bag for a gravity compressed air energy storage system, the purpose of which is to solve the technical problems of poor airtightness, low pressure resistance and low deflection of existing air storage bags.

[0021] In order to solve the above technical problems, the present invention also provides the following technical solutions: an air storage bag of a gravity compressed air energy storage system, which includes a method for manufacturing an air storage bag of a gravity compressed air energy storage system, and also includes an external rubber layer 100, and a fabric substrate 200 arranged on the external rubber layer 100, and an internal rubber layer 300 arranged on the side of the fabric substrate 200 away from the external rubber layer 100.

[0022] Beneficial effects of the present invention: The air storage bag is a layered structure formed by an external rubber layer 100, a fabric substrate 200 and an internal rubber layer 300, and is prepared by the air storage bag manufacturing method of the gravity compressed air energy storage system. It has good basic performance, and can achieve an internal pressure of not less than 5.8MPa, a crack resistance of not less than 58MPa, and a bending number of not less than 30,000 times. Even under harsh conditions of high temperature and high humidity, it can still maintain excellent packaging performance, ensuring constant pressure in the air storage bag and constant power for external work, improving the density and power generation quality of compressed air energy storage and reducing the volume of the gravity compressed air energy storage system, solving the problem that the gravity compressed air energy storage system is affected by geographical environmental factors, and has the characteristics of long life and high flexibility. In addition, for micro-compressed air energy storage systems, ground high-pressure gas storage containers can be used to get rid of dependence on gas storage caves. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 The present invention is a flow chart of a method for manufacturing an air storage bag of a gravity compressed air energy storage system.

[0025] Figure 2 It is a schematic diagram of the structure of the air storage bag of the gravity compressed air energy storage system of the present invention. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a method for manufacturing an air storage bag of a gravity compressed air energy storage system, including sewing a substrate bag, flattening the substrate bag, coating the substrate bag, and rolling the substrate bag.

[0031] Among them, sewing the substrate bag: select a variety of fabric substrates, knit at least one of the fabric substrates together, and sew the woven substrate to form a substrate bag; the air storage bag is generally cylindrical, and the various fabric substrates can include at least one of nylon fiber, polyester fiber, cotton fiber, aramid fiber, spandex fiber or polyester-cotton fiber, which are knitted together. It can be understood by those skilled in the art that the knitting of the fabric substrate requires the selection of fiber filaments with certain strength, wear resistance, high flexibility and other characteristics. In this embodiment, one, two or three of nylon fiber, polyester fiber, cotton fiber, aramid fiber, spandex fiber or polyester-cotton fiber can be selected to be knitted together to form the fabric substrate.

[0032] The knitting type of the interlaced knitting is not limited to a specific type; the knitting is performed by interlacing one, two or three kinds of fiber yarns selected from nylon fiber, polyester fiber, cotton fiber, aramid fiber, spandex fiber or polyester-cotton fiber, wherein the nylon fiber has a breaking strength of 10Cn / dtex, a 3% elongation resilience of 100%, a thickness of 1.0mm, and a gram weight of 714g / m 2 The breaking strength of polyester fiber is 8.2Cn / dtex, the 3% elongation rebound rate is 97%, the thickness is 0.5mm, and the weight is 458g / m 2 The breaking strength of cotton fiber is 3.1Cn / dtex, the 3% elongation rebound rate is 74%, the thickness is 0.2mm, and the weight is 226g / m 2 The breaking strength of aramid fiber is 21Cn / dtex, the resilience at 3% elongation is 88%, the thickness is 0.8mm, and the weight is 800g / m 2 The spandex fiber has a breaking strength of 1.1Cn / dtex, a 3% elongation rebound of 99%, a thickness of 0.4mm, and a gram weight of 421g / m 2 The breaking strength of polyester-cotton fiber is 4.2Cn / dtex, the 3% elongation rebound rate is 78%, the thickness is 0.3mm, and the weight is 325g / m 2 .

[0033] Compared with organic fabric materials, fabric substrates have incomparable formability and extensibility, and are particularly suitable for deep molding and adapting to complex shape changes. The fiber filaments are intertwined with each other, so there is no problem of pulling off between the coils. At the same time, when compounded with adhesive in the subsequent process, its interlayer performance, impact resistance and fatigue resistance are also higher than those of materials composited with organic fabrics and adhesive.

[0034] Flattening the substrate bag: The sewn substrate bag is washed and then flattened by stretching.

[0035] Coating substrate bag: coating and fixing the flattened substrate bag; the single-side coating thickness of the fabric substrate is 1-5 mm, and fixing is performed after coating.

[0036] Rolling substrate bag: The coated substrate bag is dried in a high and low temperature environment, and then rolled flat at room temperature to form an air storage bag. The internal pressure of the air storage bag is not less than 5.8MPa, the crack resistance is not less than 58MPa, and the number of flexures is not less than 30,000 times.

[0037] Preferably, the woven base material bag model is 1k, and the thickness is 1.2-1mm. K refers to the number of monofilaments contained in a carbon fiber yarn, and 1K means there are 1000 monofilaments in it; the thickness of the fabric base material is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.7mm, 0.8mm, 1mm or any value within the range thereof.

[0038] Furthermore, the base material bag has a warp density of 150 strands / 10mm, a weft density of 155 strands / 10mm, and a gram weight of 200-800g / m 2 .

[0039] Furthermore, the base material bag has a diameter of 1-10 m and a height of 5-20 m. The diameter of the air storage bag is determined by the power of the compressor of the energy storage system. Generally, the diameter of the air storage bag is preferably 1-10 m and the height is preferably 5-20 m.

[0040] Preferably, the sewn substrate bag is flattened and ironed by hot roller rolling method, and the heat treatment temperature of the hot roller rolling method is 40-50° C., preferably 45° C., to ensure that the small silk knots inside and outside the substrate bag and the unevenness caused by the weaving process are as flat and uniform as possible.

[0041] Furthermore, the coating method includes single-sided coating and double-sided coating.

[0042] Single-sided coating: Prepare a certain viscosity of adhesive, spread the stretched and leveled substrate bag flat into the adhesive and immerse it for 1 hour, then use the scraper coating process to coat the outside of the substrate bag, and the amount of adhesive per unit area can be 150-250g / m 2 , preferably 180-220g / m 2 , and then solidify, and finally the glue is coated on one side with a thickness of 1-5mm, forming an outer glue layer on the base bag.

[0043] Double-sided coating: Prepare a certain viscosity of glue, spread the stretched and leveled fabric substrate bag flat into the glue and immerse it for 1 hour, then use the scraper coating process to coat the outside, and the amount of glue per unit area of ​​the fabric substrate can be 150-250g / m 2 , and solidify, and finally the glue coating thickness on one side is 1-5mm, forming an outer glue layer on the fabric base bag, and then the fabric base bag is placed inside out, and then the inside is coated by the above method to form an inner glue layer on the fabric base bag. In the double-sided coating method, glue layers are formed on both the inside and outside of the fabric base bag.

[0044] Furthermore, the viscosity of the coated glue is 3000±500cps. The glue coated on the fabric substrate is selected from at least one of butyl rubber, nitrile rubber, polyurethane, and silicone rubber; the coating method is different according to the selected coating glue, and different coating methods are generally selected, such as dipping and scraping. In the embodiment of the present invention, a certain thickness of glue (the single-sided coating thickness of the fabric substrate is 1-5mm) is coated on the surface of the cylindrical fabric substrate bag, so that the air storage bag has the characteristics of high wear resistance, high pressure resistance, high air tightness, high bending resistance, and low and high temperature resistance.

[0045] In particular, the fixing method is as follows: the coated substrate bag is placed in an environment of 60-120°C for curing for 30 minutes. The temperature inside the oven is adjusted to a range of 60-120°C, and the coated substrate bag is placed. After 30 minutes, the glue on the substrate bag is immersed in the substrate bag and cured. The interlayer performance, impact resistance and fatigue resistance of the formed air storage bag are also higher than those of the composite material of organic fabric and glue.

[0046] Preferably, the high and low temperature changes: from room temperature to -20°C at a rate of 10°C / min, then maintained for 60-70 minutes, and then heated to 50°C at a rate of 10°C / min, and maintained for 60-70 minutes. The sewn substrate bag is placed in a high and low temperature oven, and the oven temperature is controlled by the above high and low temperature change method, so that the substrate bag is slowly dried in a high and low temperature atmosphere, and then rolled and flattened at room temperature.

[0047] During use, the air storage bag formed by the above method has the characteristics of high airtightness, high pressure resistance, high flexibility, etc., which can effectively solve the technical problems that the compressed air of the gravity compressed air energy storage system depends on the geographical location, and the energy storage density of the gravity compressed air energy storage system is low and difficult to be widely used; at the same time, for micro-gravity compressed air energy storage systems, ground high-pressure gas storage containers can be used to get rid of dependence on gas storage caves.

[0048] Example 2, reference Figure 1 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: multiple groups of experiments are carried out, and the data of the multiple groups of experiments are compared. The experimental data prove that the air storage bag prepared by the above method has the characteristics of high airtightness, high pressure resistance, high flexibility, etc.

[0049] Experiment 1: Use nylon fiber, spandex fiber and polyester-cotton fiber to knit into a cylindrical fabric base bag with a diameter of 1 meter and a height of 5 meters. After cleaning the fabric base bag, use the hot roller rolling method to heat-treat it at 45°C and iron it flat to make the fabric base bag flat and uniform. Prepare 3020cps nitrile rubber liquid, spread the flat fabric base bag into the nitrile rubber liquid and immerse it for 1 hour, use the scraping process to coat the outside of the fabric base bag with nitrile rubber liquid and put it in a 100°C oven for rapid curing for 30 minutes. Turn the fabric base bag from the inside out, and then use the above method to coat the inside of the fabric base bag with nitrile rubber liquid. Finally, the thickness of the inner and outer rubber layers of the fabric base bag is about 2.5mm (that is, double-sided coating); the amount of glue per unit area of ​​the fabric base material can be 150g / m 2 Finally, the fabric substrate bag coated with nitrile rubber liquid is placed in a high and low temperature oven, and the temperature is dropped from room temperature to -20°C at a rate of 10°C / min and maintained for 60 minutes, and then raised to 50°C at a rate of 10°C / min and maintained for 60 minutes, so that the fabric substrate bag is slowly dried in the high and low temperature atmosphere, and then rolled and flattened at room temperature to make an air storage bag.

[0050] Experiment 2: A combination of polyester fiber and cotton fiber was knitted into a cylindrical fabric bag with a diameter of 8 meters and a height of 16 meters, and then cleaned. After cleaning, the fabric bag was heat-treated at 45°C and ironed by hot roller rolling to make the fabric bag flat and uniform. In this embodiment, the fabric bag was coated with double-sided coating, and the glue liquid was 3300cps polyurethane glue. The thickness of the inner and outer rubber layers of the fabric bag was 1mm to form an air storage bag, and the glue liquid amount per unit area of ​​the fabric base material was 235g / m 2 , other production processes are consistent with Experiment 1.

[0051] Experiment 3: After knitting a cylindrical fabric base bag with a diameter of 10 meters and a height of 20 meters by using a combination of aramid fiber, spandex fiber and cotton fiber, the fabric base bag was cleaned and then ironed by hot roller rolling at 40°C to make it flat and uniform. In this embodiment, the coating method of the fabric base bag is a single-sided coating method, and the glue liquid is 3020cps butyl rubber. The thickness of the outer rubber layer of the final fabric base bag is about 5mm to form an air storage bag, and the glue liquid amount per unit area of ​​the fabric base can be 180g / m 2 , other production processes are consistent with Experiment 1.

[0052] Experiment 4: Nylon fiber, polyester fiber and cotton fiber are used to knit into a cylindrical fabric base bag with a diameter of 5 meters and a height of 10 meters. After cleaning the fabric base bag, it is heat-treated at 45°C and ironed by hot roller rolling to make the fabric base bag flat and uniform. In this embodiment, the coating method of the fabric base bag adopts a double-sided coating method, and the glue liquid adopts 2985cps silicone rubber. The thickness of the inner and outer rubber layers of the fabric base bag is 2mm to make an air storage bag. The glue liquid amount per unit area of ​​the fabric base can be 250g / m 2 , other production processes are consistent with Experiment 1.

[0053] Control experiment 1: A cylindrical fabric base bag with a diameter of 1 meter and a height of 5 meters was woven by satin weaving of three combinations of nylon fiber, spandex fiber and polyester-cotton fiber. The fabric base bag was washed and then ironed by hot roller rolling at 45°C to make it flat and uniform. In this comparative example, the fabric base bag was coated by double-sided coating, and the glue liquid was 3020cps nitrile rubber liquid. The thickness of the inner and outer rubber layers of the fabric base bag was 2.5mm. The air storage bag was made, and the glue liquid amount per unit area of ​​the fabric base bag can be 150g / m 2 , other production processes are consistent with Experiment 1.

[0054] Control experiment 2: A cylindrical fabric base bag with a diameter of 8 meters and a height of 16 meters was woven by a plain weave of a combination of polyester fiber and cotton fiber. After cleaning the fabric base bag, it was heat-treated at 45°C and ironed by a hot roller rolling method to make the fabric base bag flat and uniform. In this comparative example, the fabric base bag was coated with a double-sided coating method, and the glue liquid used was 3300cps polyurethane glue. The thickness of the inner and outer rubber layers of the final fabric base bag was 1mm to make an air storage bag, and the glue liquid amount per unit area of ​​the fabric base can be 235g / m 2 , other production processes are consistent with Experiment 1.

[0055] Control experiment 3: A cylindrical fabric base bag with a diameter of 10 meters and a height of 20 meters was woven by satin weaving of three combinations of aramid fiber, spandex fiber and cotton fiber. The fabric base bag was washed and then heat-treated at 45°C by hot roller rolling to make it flat and uniform. The fabric base bag was coated with a single-sided coating method in this comparative example, and the glue liquid used was 3020cps butyl rubber. The thickness of the outer rubber layer of the final fabric base bag was about 5mm to make an air storage bag, and the glue liquid amount per unit area of ​​the fabric base material can be 180g / m 2 , other production processes are consistent with Experiment 1.

[0056] Control experiment 4: A cylindrical fabric base bag with a diameter of 5 meters and a height of 10 meters was woven using a twill machine made of three combinations of nylon fiber, polyester fiber and polyester-cotton fiber. The fabric base bag was washed and then heat-treated at 45°C by hot roller rolling to make it flat and uniform. The fabric base bag in this comparative example was coated with a double-sided coating method, and the glue liquid used was 2985cps silicone rubber. The thickness of the inner and outer rubber layers of the fabric base bag was 2mm to make an air storage bag. The glue liquid amount per unit area of ​​the fabric base bag can be 250g / m 2 , other production processes are consistent with Experiment 1.

[0057] Control experiment 5: A combination of polyester fiber and cotton fiber was knitted into a cylindrical fabric base bag with a diameter of 8 meters and a height of 16 meters. The fabric base bag was cleaned and then heat-treated at 45°C by hot roller rolling to make it flat and uniform. In this comparative example, the fabric base bag was coated with a double-sided coating method, and the glue liquid was 4050cps polyurethane glue. The thickness of the inner and outer rubber layers of the final fabric base bag was 2mm to make an air storage bag. The glue liquid amount per unit area of ​​the fabric base can be 235g / m 2 , other production processes are consistent with Experiment 1.

[0058] Control experiment 6: A combination of aramid fiber, spandex fiber and cotton fiber was knitted into a cylindrical fabric base bag with a diameter of 10 meters and a height of 20 meters. The other production processes were consistent with those of experiment 3 and will not be repeated. The breaking strength of the aramid fiber was 12Cn / dtex, the 3% elongation rebound rate was 68%, the thickness was 0.4mm, and the gram weight was 400g / m 2 .

[0059] Control experiment 7: Nylon fiber, polyester fiber and cotton fiber were used to knit a cylindrical fabric base bag with a diameter of 5 meters and a height of 10 meters. The other manufacturing processes were consistent with those of experiment 4 and will not be repeated. The fabric base bag coated with glue was directly placed in an oven at 80°C for 24 hours without high or low temperature treatment. Then it was rolled and flattened at room temperature to form an air storage bag.

[0060] The following table shows the test results of the internal pressure, cracking strength and bending times of the airbag in the above experiment, where the test standard for internal pressure is GB / T7757-2009, the test standard for cracking strength is GB / T3923.1-2013, and the test standard for bending times is GB / T 13934-2006:

[0061] Experimental data of internal pressure, cracking strength and bending times of airbags (I)

[0062]

[0063] Analysis of experimental results: Through the above specific experimental process, it can be known that Experiment 1 and Control Experiment 1, Experiment 2 and Control Experiment 2, Experiment 3 and Control Experiment 3, Experiment 4 and Control Experiment 4 are respectively controlled experimental groups. In each group of experiments, there is only a difference in the combination method of the fabric substrate. It can be obviously concluded from the above table that the fabric substrate comprising at least one of nylon fiber, polyester fiber, cotton fiber, aramid fiber, spandex fiber or polyester-cotton fiber in the present invention is knitted with each other, which has better effect than the knitting method of plain weave machine, satin weave machine and twill weave machine. The reason is that the fiber filaments are directly knitted with each other, so there is no pull-off problem between the coils, so its internal pressure bearing and crack resistance are higher.

[0064] Experimental data of internal pressure, cracking strength and bending times of airbags (Part 2)

[0065]

[0066] Analysis of experimental results: From the comparison between Experiment 2 and Control Experiment 5, it can be seen that if the viscosity of the adhesive is high, the adhesive has a greater binding force on the fiber, the resilience of the fabric substrate is low, and it breaks instantly when stretched, so the tear strength is low. Therefore, the viscosity of the adhesive and the amount of adhesive per unit area of ​​the fabric substrate will have a greater impact on the tear strength.

[0067] From the comparison between Experiment 3 and Control Experiment 6, it can be seen that if the fabric substrate is not subjected to high and low temperature treatment and is directly placed in an 80°C oven for 24 hours, the adhesive will instantly fix the fiber filaments, and the fabric substrate's crack resistance will also be low. If the substrate is slowly cured under high and low temperature conditions, the adhesive and fiber filaments can be fully and effectively immersed and slowly softened, which improves the fabric substrate's resilience.

[0068] From the comparison between Experiment 4 and Control Experiment 7, it can be seen that when the breaking strength of aramid fiber is 12Cn / dtex, the 3% elongation resilience is 68%, the thickness is 0.4mm, and the gram weight is 400g / m2, its breaking strength will be correspondingly reduced compared with Experiment 3. Therefore, the selection of fabric substrate is also very important. When the thickness and gram weight are low, its crack resistance is also low. When the thickness and gram weight are high, although its breaking strength is improved, it is not applicable from the perspective of manufacturing process and economy.

[0069] In summary, the combination mode of the fabric substrate, the viscosity of the glue, the curing method and the selection of the fabric substrate are all factors that affect the internal pressure bearing, crack resistance and number of flexures of the prepared air storage bag. Among them, by knitting a fabric substrate of at least one of nylon fiber, polyester fiber, cotton fiber, aramid fiber, spandex fiber or polyester-cotton fiber together, the fiber filaments are directly knitted together so that there is no problem of pulling off between the coils, so the internal pressure bearing and crack resistance are relatively high. By using the glue viscosity, curing method and fabric substrate selection method given in the present invention, an air storage bag that meets the requirements of internal pressure bearing of not less than 5.8 MPa, crack resistance of not less than 58 MPa, and number of flexures of not less than 30,000 times can be prepared.

[0070] The remaining structures are the same as those of Example 1.

[0071] Example 3, reference Figure 2 , which is the third embodiment of the present invention, further provides an air storage bag of a gravity compressed air energy storage system, including the method for manufacturing an air storage bag of a gravity compressed air energy storage system in the above embodiment, including an external adhesive layer 100, and a fabric substrate 200 arranged on the external adhesive layer 100, and an internal adhesive layer 300 arranged on the side of the fabric substrate 200 away from the external adhesive layer 100. The air storage bag is a layered structure formed by an external rubber layer 100, a fabric substrate 200 and an internal rubber layer 300. It is prepared by the air storage bag manufacturing method of the gravity compressed air energy storage system. It has good basic performance, can achieve an internal pressure of not less than 5.8MPa, a crack resistance of not less than 58MPa, and a bending number of not less than 30,000 times. Even under harsh conditions of high temperature and high humidity, it can still maintain excellent packaging performance, ensuring constant pressure in the air storage bag and constant power for external work, improving the density and power generation quality of compressed air energy storage and reducing the volume of the gravity compressed air energy storage system, solving the problem that the gravity compressed air energy storage system is affected by geographical environmental factors, and has the characteristics of long life and high flexibility. In addition, for micro-compressed air energy storage systems, ground high-pressure gas storage containers can be used to get rid of dependence on gas storage caves.

[0072] The remaining structure is the same as that of Example 2.

[0073] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0074] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0075] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for manufacturing an air storage bag of a gravity compressed air energy storage system, characterized in that: include, Sewing a base material bag: selecting a plurality of fabric base materials, knitting at least one of the fabric base materials together, and sewing the knitted base materials to form a base material bag; Flattening the substrate bag: Wash the sewn substrate bag and then flatten it by stretching; Coating substrate bags: coating and fixing the flattened substrate bags; Rolling substrate bag: The coated substrate bag is dried in a high and low temperature changing environment, and then rolled flat at room temperature to form an air storage bag.

2. The method for manufacturing an air storage bag of a gravity compressed air energy storage system according to claim 1, characterized in that: The woven base material bag model is 1k and the thickness is 1.2-1mm.

3. The method for manufacturing an air storage bag of a gravity compressed air energy storage system according to claim 2, characterized in that: The base material bag has a warp density of 150 strands / 10mm, a weft density of 155 strands / 10mm, and a gram weight of 200-800g / m 2 .

4. The method for manufacturing an air storage bag of a gravity compressed air energy storage system according to claim 3, characterized in that: The substrate bag structure has a diameter of 1-10 m and a height of 5-20 m.

5. The method for manufacturing an air storage bag of a gravity compressed air energy storage system according to claim 4, characterized in that: The sewn base material bag is flattened and ironed by using a hot roller rolling method, and the heat treatment temperature of the hot roller rolling method is 40-50°C.

6. The method for manufacturing an air storage bag of a gravity compressed air energy storage system according to claim 5, characterized in that: Coating method: including single-sided coating and double-sided coating.

7. The method for manufacturing an air storage bag of a gravity compressed air energy storage system according to claim 6, characterized in that: The viscosity of the applied glue is 3000±500cps.

8. The method for manufacturing an air storage bag of a gravity compressed air energy storage system according to claim 7, characterized in that: Fixing method: Place the coated substrate bag in an environment of 60-120°C and cure for 30 minutes.

9. The method for manufacturing an air storage bag of a gravity compressed air energy storage system according to claim 8, characterized in that: High and low temperature changes: from room temperature to -20℃ at a rate of 10℃ / min, maintain for 60-70min, then increase the temperature to 50℃ at a rate of 10℃ / min, maintain for 60-70min.

10. An air storage bag of a gravity compressed air energy storage system, characterized in that: A method for manufacturing an air storage bag of a gravity compressed air energy storage system comprising the method described in any one of claims 1 to 9, comprising an external adhesive layer (100), a fabric substrate (200) arranged on the external adhesive layer (100), and an internal adhesive layer (300) arranged on a side of the fabric substrate (200) away from the external adhesive layer (100).

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