Novel air cylinder and manufacturing method

Abstract

The invention relates to a novel air cylinder and a manufacturing method. The air cylinder comprises a cylinder body, a winding layer and an annular reinforcing layer. The barrel is formed through blow molding and provided with a drainage connector protruding out of the surface of the barrel. The winding layer is cured on the surface of the cylinder body through high temperature and comprises a first winding layer, a second winding layer and a third winding layer; the surface of the straight cylinder section of the cylinder body is coated with the first winding layer; the second winding layer is arranged on the surfaces of the first winding layer and the end socket of the cylinder and covers the surface of the end socket; the third winding layer covers the surface of the straight barrel section of the barrel and is positioned on the upper layer of the second winding layer; the annular reinforcing layer is arranged on the periphery of the drainage connector and located between the first winding layer and the third winding layer. Water in the barrel can be discharged in time based on the arrangement of the water discharging connector, and it is guaranteed that the interior of the barrel is clean; and the first winding layer, the second winding layer, the third winding layer and the annular reinforcing layer are arranged, so that the overall strength of the air cylinder is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure vessels, and particularly to a novel air storage cylinder and a manufacturing method thereof. Background Art

[0002] Most automobiles use air pressure or hydraulic pressure as the power source for braking. Generally, trucks with a load capacity exceeding 7.5 tons use air pressure as the power source for braking. The air braking system compresses air through an air compressor in the engine, filters it through a dryer, and then transports it to the air storage cylinder for storage. The air storage cylinder has four main functions: energy storage, pressure stabilization, filtration, and temperature reduction. When storing air for a long time (more than one week), water will still precipitate from the compressed air in the cylinder, and a drainage structure needs to be designed below the air storage cylinder to ensure that the water can be discharged smoothly. Most of the air storage cylinders on the market are made of materials such as sheet metal, aluminum, composite materials, and engineering plastics, mainly steel and aluminum alloy materials, and a small number of composite material air storage cylinders are beginning to be tried out. For example, Patent CN102501847A is an air storage cylinder made of steel material, with a relatively large weight. Although the cost is low, the anti-corrosion performance cannot be guaranteed, and the forming process is relatively complex; Patent CN214874760U is an air storage cylinder made of aluminum alloy material. Although a certain weight reduction has been achieved, compared with composite materials, the weight is still relatively large, and it involves aluminum alloy welding, and the forming process is relatively complex. Although Patent CN115962405A is a composite material air storage cylinder, it does not have a conventional lower drainage structure, resulting in the possibility of incomplete drainage. The above problems need to be solved urgently. Summary of the Invention

[0003] The present invention discloses a novel air storage cylinder and a manufacturing method thereof, aiming to solve the technical problems existing in the prior art.

[0004] The present invention adopts the following technical solutions:

[0005] The present invention provides a novel air storage cylinder, which includes a cylinder body, a winding layer, and an annular reinforcing layer; the cylinder body is blow-molded and has a drainage interface protruding from the surface of the cylinder body; the winding layer is cured at high temperature on the surface of the cylinder body and includes a first winding layer, a second winding layer, and a third winding layer; the first winding layer is coated on the surface of the straight cylinder section of the cylinder body; the second winding layer is arranged on the first winding layer and the head of the cylinder body, and covers the head surface; the third winding layer is coated on the surface of the straight cylinder section of the cylinder body and is located above the second winding layer; the annular reinforcing layer is arranged on the outer periphery of the drainage interface and is located between the first winding layer and the third winding layer.

[0006] In a novel air storage cylinder of the present invention, the first winding layer is formed by winding a first winding tape around in a direction forming a first angle with the circumferential direction of the straight cylinder section; the first angle is 45° - 90°; and / or, the second winding layer is formed by winding a second winding tape around in a direction forming a second angle with the axial direction of the cylinder body; the second angle is 0° - 55°; and / or, the third winding layer is formed by winding a third winding tape around in a direction forming a third angle with the circumferential direction of the straight cylinder section; the third angle is 45° - 90°.

[0007] In a novel air storage cylinder of the present invention, both the first angle and the third angle are 89.9°; the second angle is 6.75°.

[0008] In a novel air storage cylinder of the present invention, the second winding layer includes a full - wrap layer and a semi - wrap layer; the full - wrap layer is closer to the surface of the cylinder body and covers the surface of the head; the semi - wrap layer covers a part of the surface of the head.

[0009] In a novel air storage cylinder of the present invention, the semi - wrap layer covers half of the surface of the head.

[0010] In a novel air storage cylinder of the present invention, the first winding layer, the second winding layer and the third winding layer are all composite material layers composed of glass fiber and epoxy resin; wherein, the weight percentage of the epoxy resin is 27 - 30%.

[0011] In a novel air storage cylinder of the present invention, the annular reinforcement layer is a glass fiber cloth or a carbon fiber cloth or a basalt fiber cloth.

[0012] In a novel air storage cylinder of the present invention, it further includes a cylindrical connector; one end of the cylindrical connector is sleeved outside the drainage interface and is covered by the annular reinforcement layer and the winding layer, and the other end is used to connect a drainage valve.

[0013] In a novel air storage cylinder of the present invention, the third winding layer is a double - layer structure.

[0014] In a novel air storage cylinder of the present invention, the cylinder body is made of modified polyethylene or nylon and is formed by blow - molding process.

[0015] In a second aspect, the present invention also provides a manufacturing method of any one of the above - mentioned air storage cylinders, including the following steps:

[0016] Blow - mold the cylinder body;

[0017] Install a cylindrical connector at the position of the corresponding drainage interface of the cylinder body;

[0018] Inflate the cylinder body to a first pressure and maintain the pressure unchanged;

[0019] Wrap the first winding tape, the second winding tape, and the third winding tape around the surface of the cylinder in sequence;

[0020] Subject the wound cylinder to high-temperature curing;

[0021] After the curing is completed, drill at the position of the corresponding drainage interface of the cylinder to form the drainage interface;

[0022] Manufacturing is completed.

[0023] In the manufacturing method of the present invention, the first pressure is 0.05 Mpa.

[0024] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0025] The present invention mainly provides a new type of gas storage cylinder. The cylinder body is a cylindrical structure with a drainage interface, which can timely drain the water in the cylinder body to ensure the cleanliness inside the cylinder body; and the cylinder body formed by blow molding, and the first winding layer, the second winding layer, and the third winding layer are arranged on the surface of the cylinder body can improve the structural strength of the gas storage cylinder, and the overall weight is relatively low; the annular reinforcing layer is used to strengthen the structure of the drainage interface, and cooperating with arranging the annular reinforcing layer between the first winding layer and the third winding layer can further improve the overall strength of the gas storage cylinder. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. These drawings form a part of the present invention. The schematic embodiments of the present invention and their explanations explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 is a schematic structural diagram of a new type of gas storage cylinder of the present invention;

[0028] Figure 2 is a schematic structural diagram of the cylinder body of the present invention;

[0029] Figure 3 is of the present invention Figure 3 is a schematic structural diagram of a partial enlargement at C;

[0030] Figure 4 is a schematic structural diagram of the first winding layer of the present invention;

[0031] Figure 5 is a schematic structural diagram of the second winding layer and the third winding layer of the present invention;

[0032] Figure 6 is a schematic structural diagram of the full cladding of the present invention;

[0033] Figure 7Schematic diagram of the semi-cladding structure of the present invention;

[0034] Figure 8 This is the third schematic diagram of the structure of the cylinder body of the present invention.

[0035] Explanation of reference numerals:

[0036] 1. Cylinder body; 11. Straight cylinder section; 12. Head; 13. Drainage interface; 2. Winding layer; 21. First winding layer; 211. First winding tape; 22. Second winding layer; 221. Second winding tape; 222. Full cladding; 223. Semi-cladding; 23. Third winding layer; 231. Third winding tape; 3. Annular reinforcement layer; 4. Cylindrical connector; 41. Outer edge; 5. Threaded adapter; 7. Inlet and outlet pipe fittings; 8. Sealing ring. Specific embodiments

[0037] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is generally used in the sense of including "and / or", unless otherwise clearly specified in the content.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a magnetic connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically limited.

[0039] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0040] To solve the problems existing in the prior art, the embodiments of the present application provide a new type of gas storage cylinder and manufacturing method.

[0041] Such as Figures 1-6As shown in the figure, a new type of air storage cylinder includes a cylinder body 1, a winding layer 2, and an annular reinforcing layer 3. The cylinder body 1 is blow-molded and has a drainage interface 13 protruding from the surface of the straight cylinder section of the cylinder body 1. The winding layer 2 is cured on the surface of the cylinder body 1 by high temperature. The high temperature curing temperature can be curing at 80°C for 4 hours and then raising the temperature to 90°C for 2 hours. And it includes a first winding layer 21, a second winding layer 22, and a third winding layer 23. The first winding layer 21 is coated on the surface of the straight cylinder section 11 of the cylinder body 1. The second winding layer 22 is arranged on the surface of the first winding layer 21 and the head 12 of the cylinder body 1 and covers the surface of the head 12. The third winding layer 23 is coated on the surface of the straight cylinder section 11 of the cylinder body 1 and is located above the second winding layer 22. The annular reinforcing layer 3 is arranged on the outer periphery of the drainage interface 13 and is located between the first winding layer 21 and the third winding layer 23. Specifically, the thicknesses of the first winding layer 21, the second winding layer 22, and the third winding layer 23 can be determined according to requirements and are not limited here.

[0042] For a new type of air storage cylinder of the present invention, the cylinder body 1 is a cylindrical structure with a drainage interface, which can timely drain the water in the cylinder body 1 to ensure the cleanliness inside the cylinder body 1. The cylinder body 1 is obtained by blow molding, and setting the first winding layer 21, the second winding layer 22, and the third winding layer 23 on the surface of the cylinder body 1 can improve the structural strength of the air storage cylinder and the overall weight is relatively low. The annular reinforcing layer 3 is used to strengthen the structure of the drainage interface 13, and cooperating with setting the annular reinforcing layer 3 between the first winding layer 21 and the third winding layer 23 can further improve the overall strength of the air storage cylinder.

[0043] In some preferred embodiments, as Figure 2 shown, the cylinder body 1 of the cylinder includes a straight cylinder section 11 and a head 12. The drainage interface 13 is integrally formed on the straight cylinder section 11 and communicates with the inside of the cylinder body 1. One of the two heads 12 has an air inlet and outlet. A valve seat and an aluminum part for the air inlet and outlet are installed at the air inlet and outlet. Based on the air inlet and outlet on one head 12, the airtightness of the air storage cylinder can be improved, which is beneficial to the integration of external parts. Specifically, the drainage interface 13 protrudes from the surface of the straight cylinder section 11.

[0044] In some preferred embodiments, as Figure 8 shown, it further includes an inlet and outlet pipe fitting 7 and a sealing ring 8. The sealing ring 8 is clamped between the air inlet and outlet and the inlet and outlet pipe fitting 7 to form a sealing structure. Preferably, the inlet and outlet pipe fitting 7 is made of aluminum alloy.

[0045] In some preferred embodiments, as Figure 4 and Figure 5As shown, the first winding layer 21 is formed by the first winding belt 211 winding along the first angle direction with the circumference of the straight tube section 11; the first angle A is 45°-90°; and / or, the second winding layer 22 is formed by the second winding belt 221 winding along the second angle direction with the axial direction of the cylinder 1; the second angle B is 0°-55°; within this range, it is not easy to slip yarn; and / or, the third winding layer 23 is formed by the third winding belt 231 winding along the third angle with the circumference of the straight tube section 11; the third angle is 45°-90°; based on the first winding The belt 211 and the third winding belt 231 are wound in a circular direction, and the second winding belt 221 is wound axially, which can improve the overall compressive resistance of the air cylinder, and can improve the uniformity of the pressure bearing of the air cylinder, avoid stress concentration, and thus improve the overall strength and stability of the air cylinder; and can improve the impact resistance of the air cylinder, that is, it can disperse and absorb the impact energy when subjected to external impact, thereby improving the fatigue resistance of the air cylinder; the combination of annular and axial winding can also reduce the damage accumulation under cyclic loads and extend the service life.

[0046] Preferably, the first angle and the third angle A are both 89.9°; the second angle B is 6.75°; at this angle, on the one hand, the material usage rate can be reduced, and the bearing efficiency of the winding layer can be made higher; on the other hand, the axial force balance can be ensured. If this angle is exceeded, the winding layer material will be wasted; if this angle is not reached, the axial pressure provided by the winding layer will be less than the pressure in the gas cylinder, resulting in explosion failure.

[0047] In some preferred embodiments, Figure 6 and Figure 7 As shown, the second winding layer 22 includes a full cladding 222 and a half cladding 223; the full cladding 222 is closer to the surface of the cylinder 1 and covers the surface of the head 12; the half cladding 223 covers a part of the surface of the head 12; based on this, it is possible to reduce material consumption and improve processing efficiency while ensuring the structural strength of the gas storage cylinder.

[0048] Preferably, the half cladding 223 covers half of the surface of the sealing head 12 ; that is, the second wrapping tapes 221 are arranged at equal intervals to cover half of the surface of the sealing head 12 .

[0049] In some preferred embodiments, the first winding layer 21, the second winding layer 22 and the third winding layer 23 are all composite material layers composed of glass fiber and epoxy resin; wherein the weight percentage of the epoxy resin is 27%-30%; based on this, the structural strength of the gas storage cylinder can be maximized and it can have higher shear resistance; and when the weight percentage of the epoxy resin is 20% or 40%, the structural strength and shear resistance will be reduced by more than 10%.

[0050] In some preferred embodiments, the annular reinforcing layer 3 is made of fiberglass cloth, carbon fiber cloth or basalt fiber cloth; adopting such a material has better compatibility with the winding layer, better strength consistency after high-temperature curing, high strength and low cost.

[0051] In some preferred embodiments, the annular reinforcing layer 3 is arranged within 25 cm around the cylindrical connecting piece 4.

[0052] In some preferred embodiments, it further includes a cylindrical connecting piece 4; one end of the cylindrical connecting piece 4 is sleeved outside the drainage interface 13 and is covered by the annular reinforcing layer 3 and the winding layer 2, and the other end is used to connect the drainage valve; based on the setting of the cylindrical connecting piece 4, it is convenient for the installation of the drainage valve, and covering the end of the cylindrical connecting piece 4 with the annular reinforcing layer 3 and the winding layer 2 can improve the connection strength and sealing performance of the cylindrical connecting piece 4; preferably, one end of the cylindrical connecting piece 4 adjacent to the surface of the cylinder body 1 has an outer edge 41, thereby further improving the connection stability of the cylindrical connecting piece 4; further preferably, the diameter of one end of the cylindrical connecting piece 4 adjacent to the surface of the cylinder body 1 is smaller than the other end to facilitate winding and connection with the drainage valve.

[0053] Preferably, the cylindrical connecting piece 4 is connected to the drainage valve through a threaded adapter 5. The threaded adapter 5 is a tubular structure with threads on its surface, and the cylindrical connecting piece 4 and the drainage valve are connected by screwing.

[0054] In some preferred embodiments, the third winding layer 23 is a double-layer structure; thereby further improving the structural strength of the air storage cylinder.

[0055] In some preferred embodiments, the cylinder body 1 is made of modified polyethylene or nylon material and is formed by blow molding; adopting such a material has better formability and stiffness, better corrosion resistance, and can reduce the weight of the air storage cylinder; adopting blow molding makes the integrity and airtightness of the cylinder body 1 better, especially forming the drainage interface 13 at one time to ensure the sealing performance at the drainage interface 13.

[0056] Example 2

[0057] This embodiment provides a manufacturing method of the air storage cylinder in the above Example 1, which includes the following steps:

[0058] Blow-mold the cylinder body 1;

[0059] Install the cylindrical connecting piece 4 at the position of the cylinder body 1 corresponding to the drainage interface 13;

[0060] Inflate the cylinder body 1 to the first pressure and maintain the pressure unchanged;

[0061] Wind the first winding tape 211, the second winding tape 221, and the third winding tape 231 around the surface of the cylinder 1 in sequence, and arrange the annular reinforcement layer 3 between the winding layers formed by the first winding tape 211 and the third winding tape 231; preferably, the first winding tape 211, the second winding tape 221, and the third winding tape 231 are all continuously wound.

[0062] Subject the wound cylinder 1 to high-temperature curing, specifically maintaining high-temperature curing under the first pressure.

[0063] After the curing is completed, drill holes at the position of the corresponding drainage interface 13 of the cylinder 1 to form the drainage interface 13.

[0064] Manufacturing is completed.

[0065] The manufacturing method of the present invention is based on manufacturing the cylinder 1 by blow molding, so that the integrity and sealing performance of the cylinder 1 are better; the processing process is simpler; and, based on maintaining a pressurized state inside the cylinder 1 during the high-temperature curing process, the rigidity of the inner liner can be well maintained, the shape of the cylinder 1 remains unchanged during the manufacturing process, the shape stability of the cylinder 1 during molding is ensured, and problems such as collapse are avoided; and by adopting the method of forming the external shape of the drainage interface 13 by blow molding and then drilling to form the drainage interface 13 after winding and curing, the shape stability of the cylinder 1 during winding and curing can be ensured, and thus the structural strength of the cylinder 1 is ensured.

[0066] In some preferred embodiments, the cylinder 1 is blow molded by a mold, and the blow molding mold has a groove at the position corresponding to the drainage interface 13 to form a solid boss structure during blow molding; other structures of the mold are the same as those of the existing mold.

[0067] In some preferred embodiments, it further includes the step of performing an airtightness test and a pressure resistance test on the cylinder 1.

[0068] In some preferred embodiments, the first pressure is 0.05 Mpa; if the pressure is too high, abnormal protrusions will occur on the surface of the cylinder 1, and if it is too low, the surface of the cylinder 1 will be concave, forming a molding effect.

[0069] The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims, and all of them fall within the protection scope of the present invention.

Claims

1. A new type of air storage cylinder, characterized in that: It includes a cylinder, a winding layer and an annular reinforcement layer; The cylinder is blow-molded and has a drainage interface protruding from the surface of the cylinder; The winding layer is cured on the surface of the cylinder by high temperature, and includes a first winding layer, a second winding layer and a third winding layer; The first winding layer is coated on the surface of the straight section of the cylinder; The second winding layer is arranged on the first winding layer and the end surface of the cylinder, and covers the end surface; The third winding layer covers the surface of the straight section of the cylinder and is located on the upper layer of the second winding layer; The annular reinforcement layer is arranged on the outer periphery of the drainage interface and is located between the first winding layer and the third winding layer.

2. A novel gas storage cylinder according to claim 1, characterized in that: The first winding layer is formed by a first winding belt winding along a first angle with the circumference of the straight tube section; the first angle is 45°-90°; and / or, the second winding layer is formed by a second winding belt winding along a second angle with the axial direction of the cylinder; the second angle is 0°-55°; and / or, the third winding layer is formed by a third winding belt winding along a third angle with the circumference of the straight tube section; the third angle is 45°-90°.

3. A novel gas storage cylinder according to claim 2, characterized in that: The first angle and the third angle are both 89.9°; the second angle is 6.75°.

4. A novel gas storage cylinder according to claim 1, characterized in that: The second winding layer includes a full wrap and a half wrap; The full cladding is closer to the surface of the cylinder and covers the surface of the head; The half cladding covers a portion of the head surface.

5. A novel gas storage cylinder according to claim 4, characterized in that: The half cladding covers half of the surface of the head.

6. A novel gas storage cylinder according to any one of claims 1 to 5, characterized in that: The first winding layer, the second winding layer and the third winding layer are all composite material layers composed of glass fiber and epoxy resin; wherein the weight percentage of the epoxy resin is 27-30%.

7. A novel gas storage cylinder according to any one of claims 1 to 5, characterized in that: The annular reinforcement layer is glass fiber cloth, carbon fiber cloth or basalt fiber cloth.

8. A novel gas storage cylinder according to any one of claims 1 to 5, characterized in that: Also included is a cylindrical connector; One end of the cylindrical connecting piece is sleeved on the outside of the drainage interface and is covered by the annular reinforcement layer and the winding layer, and the other end is used for connecting the drainage valve.

9. A novel gas storage cylinder according to any one of claims 1 to 5, characterized in that: The third winding layer is a double-layer structure.

10. A novel air storage cylinder according to any one of claims 1 to 5, characterized in that: The barrel is made of modified polyethylene or nylon and is formed by a blow molding process.

11. A method for manufacturing a gas storage cylinder according to any one of claims 1 to 10, characterized in that: The steps include: Blow molding the barrel; Installing a cylindrical connector at a position of the cylinder corresponding to the drainage interface; Inflate the cylinder to a first pressure and maintain the pressure constant; Winding the first winding belt, the second winding belt and the third winding belt sequentially on the surface of the cylinder; Curing the wound cylinder at high temperature; After the solidification is completed, a hole is drilled at a position of the cylinder corresponding to the drainage interface to form the drainage interface; Manufacturing completed.

12. The manufacturing method according to claim 11, characterized in that: The first pressure is 0.05 MPa.

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