Pressurizing and curing method for light III-type winding composite gas cylinder for respirator

Abstract

The invention discloses a pressurizing and curing method for a light III-type winding composite gas cylinder for a respirator, which comprises the following steps: S1, material preparation and pretreatment: materials comprise a fiber material and resin; s2, uniformly winding the fiber material on the surface of the gas cylinder through a preset winding process; and S3, the wound gas cylinder is pressurized and cured. According to the pressurization curing method for the light III type winding composite gas cylinder for the respirator, the problems that in an existing curing process, the weight and the performance are difficult to consider, the internal quality is poor, and the production efficiency is low are solved, and the composite gas cylinder which is light, high in performance, safe and reliable is produced.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing composite gas cylinders for respirators, and in particular relates to a pressurized curing method for a lightweight type III wound composite gas cylinder for a respirator. Background Art

[0002] In the production of Type III wrapped composite gas cylinders for respirators, the curing process is crucial to the quality and performance of the gas cylinders. The commonly used curing process is carried out under normal pressure, and the material and structure treatment method is relatively traditional. Although this process can produce qualified gas cylinders, it is insufficient in meeting the comprehensive requirements of respirators for lightweight, high performance and high safety of gas cylinders.

[0003] The existing technology mainly has the following problems:

[0004] Conflict between weight and performance: In the pursuit of lightweight, the existing process of producing gas cylinders often sacrifices certain performance, such as strength and stability. This is because during the normal pressure curing process, the materials are not tightly bonded, and the fiber composite material layer has a large porosity, which cannot fully ensure the ability of the gas cylinder to withstand high pressure while reducing weight.

[0005] Internal quality issues: Normal pressure curing can easily cause tiny pores and uneven resin distribution inside the cylinder. These defects may become stress concentration points during use, reducing the service life and safety performance of the cylinder, especially in complex environments where respirator cylinders are frequently used. This risk is more prominent.

[0006] Low production efficiency: In order to ensure a certain quality, the traditional curing process often requires a long curing time, and more quality inspections and polishing and repair processes are required in the later stage, resulting in low overall production efficiency and increased production costs. Summary of the invention

[0007] In order to solve the problems in the prior art, the present invention aims to provide a pressurized curing method for a lightweight type III wrapped composite gas cylinder for a respirator, so as to solve the problems of difficulty in balancing weight and performance, poor internal quality and low production efficiency in the existing curing process, and produce a composite gas cylinder that is both lightweight, high-performance, safe and reliable.

[0008] In order to achieve the above object, the present invention provides a pressurized curing method for a lightweight type III wound composite gas cylinder for a respirator, comprising the steps of:

[0009] S1: material preparation and pretreatment step, wherein the material includes fiber material and resin;

[0010] S2: uniformly winding the fiber material on the surface of the gas cylinder through a preset winding process;

[0011] S3: Pressurizing and curing the wrapped gas cylinder.

[0012] As an implementation mode, the step S1 further comprises the steps of:

[0013] S11: Selecting the fiber material that is light and high-strength;

[0014] S12: Determine the proportion of glue content during winding according to the mechanical property requirements of the gas cylinder;

[0015] S13: performing surface treatment on the fiber material;

[0016] S14: Selecting the resin with low viscosity, high toughness and good compatibility with the fiber material;

[0017] S15: pre-baking the resin.

[0018] As an embodiment, the fiber material includes T800 grade carbon fiber composite material.

[0019] As an embodiment, the surface treatment adopts plasma treatment technology.

[0020] As an implementation manner, in the step S2:

[0021] High-precision winding equipment is used to optimize the fiber winding path and tension through computer simulation; the winding angle is dynamically adjusted within a preset winding angle range according to the shape of the gas cylinder and force analysis; the winding tension is controlled within a preset winding tension range; during the winding process, the fiber material is simultaneously impregnated with resin to ensure that the resin fully penetrates between the fiber materials.

[0022] As an implementation manner, the preset winding angle range a is: 11°≤a≤18°.

[0023] As an implementation manner, the preset winding tension range b is: 40N≤b≤60N.

[0024] As an implementation mode, the step S3 further comprises the steps of:

[0025] S31: performing a scraping process on the gas cylinder;

[0026] S32: raising the room temperature to 80° C. at a first heating rate;

[0027] S33: placing the gas cylinder into a pressurized curing device;

[0028] S34: pre-curing the gas cylinder at a preset low temperature value; and continuing for a preset time, the pressure in the pre-curing stage is less than 0.4 MPa;

[0029] S34: raising the temperature in the pressurized curing device to 80° C. at a second heating rate, and increasing the pressure to 0.4 MPa for 2 hours;

[0030] S35: raising the temperature in the pressurized curing device to 125° C. at a third heating rate, maintaining the pressure at 0.6 MPa for 3 hours;

[0031] S36: Slowly reduce the pressure to normal pressure, and the pressure reduction rate is controlled at 0.01MPa / min.

[0032] As an embodiment, the scraping process comprises the following steps:

[0033] S311: placing the gas cylinder into a rubber scraper and rotating it horizontally;

[0034] S312: The scraper uses a heating lamp of 800-1000W to pre-bake the gas cylinder in the scraper for 6-10 minutes;

[0035] S313: scraping glue on the surface of the gas cylinder;

[0036] S314: pre-baking the gas cylinder for 2-3 minutes;

[0037] S315: Scrape off the glue baked on the surface of the gas cylinder again.

[0038] As an implementation manner, the first heating rate is 1.5°C / min; the second heating rate is 2°C / min; and the third heating rate is 1.5°C / min.

[0039] The present invention adopts the above technical solution, so it has the following beneficial effects:

[0040] Lightweight and high performance: By optimizing materials and adopting a pressurized curing process, the weight of the composite gas cylinder produced is reduced by 22% compared with the traditional process. At the same time, the designed burst strength of the gas cylinder can still be met, effectively resolving the contradiction between weight and performance.

[0041] Improved internal quality: Pressurized curing makes the resin more evenly distributed among the fibers, reduces the porosity, greatly reduces stress concentration points, improves the internal quality and safety performance of the gas cylinder, and extends its service life.

[0042] Improved production efficiency: The entire curing process reduces the workload of post-quality inspection and repair compared to traditional processes, improves production efficiency and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in 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.

[0044] Figure 1 This is a flow chart of the pressurized curing method of a lightweight Type III wrapped composite gas cylinder for a respirator according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "connection" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] See also Figure 1 A pressurized curing method for a lightweight type III wound composite gas cylinder for a respirator according to an embodiment of the present invention comprises the following steps:

[0049] S1: material preparation and pretreatment step, wherein the material includes fiber material and resin;

[0050] In this embodiment, the step S1 further includes the steps of:

[0051] S11: Selecting the fiber material that is lightweight and high-strength, such as a high-strength T800 grade carbon fiber composite material;

[0052] S12: Determine the glue content ratio during winding according to the mechanical property requirements of the gas cylinder, where the glue content ratio refers to the ratio of the resin glue liquid;

[0053] S13: performing surface treatment on the fiber material by using plasma treatment technology to improve the surface activity of the fiber and enhance the bonding force with the resin;

[0054] S14: Selecting the resin with low viscosity, high toughness and good compatibility with the fiber material;

[0055] S15: Before use, the resin is pre-baked to remove bubbles and impurities therein to ensure the purity and fluidity of the resin.

[0056] S2: uniformly winding the fiber material on the surface of the gas cylinder through a preset winding process;

[0057] In this embodiment, a high-precision winding device is used to optimize the fiber winding path and tension through computer simulation; the winding angle is dynamically adjusted within a preset winding angle range according to the shape of the gas cylinder and the force analysis to ensure that the fibers are evenly distributed on the surface of the gas cylinder to withstand the internal pressure;

[0058] The winding tension is controlled within the preset winding tension range to arrange the fibers closely while avoiding damage to the fibers due to excessive tension.

[0059] During the winding process, the fiber material is simultaneously impregnated with resin to ensure that the resin fully penetrates between the fiber materials.

[0060] The preset winding angle range a is: 11°≤a≤18°.

[0061] The preset winding tension range b is: 40N≤b≤60N.

[0062] S3: Pressurizing and curing the wrapped gas cylinder.

[0063] In this embodiment, the step S3 further includes the steps of:

[0064] S31: performing a scraping process on the gas cylinder;

[0065] In this embodiment, the scraping process comprises the following steps:

[0066] S311: placing the gas cylinder into a rubber scraper and rotating it horizontally;

[0067] S312: The scraper uses a heating lamp of 800-1000W to pre-bake the gas cylinder in the scraper for 6-10 minutes;

[0068] S313: scraping glue on the surface of the gas cylinder;

[0069] S314: pre-baking the gas cylinder for 2-3 minutes;

[0070] S315: Scrape off the glue baked on the surface of the gas cylinder again.

[0071] S32: Raise the room temperature to 80°C at a first heating rate. In this embodiment, the first heating rate is 1.5°C / min

[0072] S33: placing the gas cylinder into a pressurized curing device;

[0073] S34: pre-curing the gas cylinder at a preset low temperature value; and continuing for a preset time to allow the resin to be initially cured and stabilize the fiber structure, and the pressure in the pre-curing stage is less than 0.4 MPa;

[0074] S34: raising the temperature in the pressurized curing device to 80° C. at a second heating rate, and increasing the pressure to 0.4 MPa for 2 hours. In this embodiment, the second heating rate is 2° C. / min; the resin is further cross-linked and cured. The pressure at this stage helps the resin to better fill the tiny pores between the fibers.

[0075] S35: Raise the temperature in the pressurized curing equipment to 125°C at a third heating rate, maintain the pressure at 0.6 MPa, and continue for 3 hours. In this embodiment, the third heating rate is 1.5°C / min.

[0076] S36: After the high-temperature curing stage is completed, slowly reduce the pressure to normal pressure, and control the pressure reduction rate at 0.01MPa / min to avoid damage to the internal structure of the gas cylinder due to sudden pressure changes.

[0077] The pressurized curing method of a lightweight type III wound composite gas cylinder for a respirator according to an embodiment of the present invention has the following beneficial effects:

[0078] Lightweight and high performance: By optimizing materials and adopting a pressurized curing process, the weight of the composite gas cylinder produced is reduced by 22% compared with the traditional process. At the same time, the designed burst strength of the gas cylinder can still be met, effectively resolving the contradiction between weight and performance.

[0079] Improved internal quality: Pressurized curing makes the resin more evenly distributed among the fibers, reduces the porosity, greatly reduces stress concentration points, improves the internal quality and safety performance of the gas cylinder, and extends its service life.

[0080] Improved production efficiency: The entire curing process reduces the workload of post-quality inspection and repair compared to traditional processes, improves production efficiency and reduces production costs.

[0081] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not intended to be additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present invention.

[0082] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A pressurized curing method for a lightweight type III wound composite gas cylinder for a respirator, comprising the steps of: S1: material preparation and pretreatment step, wherein the material includes fiber material and resin; S2: uniformly winding the fiber material on the surface of the gas cylinder through a preset winding process; S3: Pressurizing and curing the wrapped gas cylinder.

2. The pressurized curing method of the lightweight type III wound composite gas cylinder for respirators according to claim 1 is characterized in that: The S1 step further comprises the steps of: S11: Selecting the fiber material that is light and high-strength; S12: Determine the proportion of the glue content during winding according to the mechanical property requirements of the gas cylinder; S13: performing surface treatment on the fiber material; S14: Selecting the resin with low viscosity, high toughness and good compatibility with the fiber material; S15: pre-baking the resin.

3. The pressurized curing method of the lightweight type III wound composite gas cylinder for a respirator according to claim 2 is characterized in that: The fiber material includes T800 grade carbon fiber composite material.

4. The pressurized curing method of the lightweight type III wound composite gas cylinder for a respirator according to claim 2, characterized in that: The surface treatment adopts plasma treatment technology.

5. The pressurized curing method of the lightweight type III wound composite gas cylinder for a respirator according to claim 1, characterized in that: In the step S2: High-precision winding equipment is used to optimize the fiber winding path and tension through computer simulation; the winding angle is dynamically adjusted within a preset winding angle range according to the shape of the gas cylinder and force analysis; the winding tension is controlled within a preset winding tension range; during the winding process, the fiber material is simultaneously impregnated with resin to ensure that the resin fully penetrates between the fiber materials.

6. The pressurized curing method of the lightweight type III wound composite gas cylinder for a respirator according to claim 5, characterized in that: The preset winding angle range a is: 11°≤a≤18°.

7. The pressurized curing method of the lightweight type III wound composite gas cylinder for a respirator according to claim 5, characterized in that: The preset winding tension range b is: 40N≤b≤60N.

8. The pressurized curing method of the lightweight type III wound composite gas cylinder for a respirator according to claim 1, characterized in that: The S3 step further comprises the steps of: S31: performing a scraping process on the gas cylinder; S32: raising the room temperature to 80° C. at a first heating rate; S33: placing the gas cylinder into a pressurized curing device; S34: pre-curing the gas cylinder at a preset low temperature value; and continuing for a preset time, the pressure in the pre-curing stage is less than 0.4 MPa; S34: raising the temperature in the pressurized curing device to 80° C. at a second heating rate, and increasing the pressure to 0.4 MPa for 2 hours; S35: raising the temperature in the pressurized curing device to 125° C. at a third heating rate, maintaining the pressure at 0.6 MPa for 3 hours; S36: Slowly reduce the pressure to normal pressure, and the pressure reduction rate is controlled at 0.01MPa / min.

9. The pressurized curing method of the lightweight type III wound composite gas cylinder for a respirator according to claim 8, characterized in that: The scraping process comprises the following steps: S311: placing the gas cylinder into a rubber scraper and rotating it horizontally; S312: The scraper uses a heating lamp of 800-1000W to pre-bake the gas cylinder in the scraper for 6-10 minutes; S313: scraping glue on the surface of the gas cylinder; S314: pre-baking the gas cylinder for 2-3 minutes; S315: Scrape off the glue baked on the surface of the gas cylinder again.

10. The pressurized curing method of lightweight type III wound composite gas cylinder for respirator according to claim 8, characterized in that: The first heating rate is 1.5°C / min; the second heating rate is 2°C / min; and the third heating rate is 1.5°C / min.

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