阅读说明：本技术 一种复合材料气瓶固化用通气连接轴 (Ventilation connecting shaft for curing composite material gas cylinder ) 是由 狄成瑞 乔琨 朱波 李哲 赵延滨 吕林 张巍 于 2020-03-16 设计创作，主要内容包括：本发明涉及一种复合材料气瓶固化用通气连接轴,所述连接轴为中空管式结构,所述连接轴侧壁上设置有多个气孔,所述连接轴的两端设置有螺纹。本发明是将固化时对气瓶起连接旋转作用的连接轴加工成多孔的中空轴,使旋转固化炉内的空气能够进入气瓶内部,与气瓶外部的空气同步升降温。解决了气瓶在升降温时气瓶厚度方向上出现的温度梯度问题,特别是对高压气瓶的大厚度复材层需分次固化造成的能耗高,效率低的问题,同时提高了气瓶复材层内外受热均匀性,能够有效减少气瓶质量问题。(The invention relates to a ventilating connecting shaft for curing a composite material gas cylinder, which is of a hollow tubular structure, wherein a plurality of air holes are formed in the side wall of the connecting shaft, and threads are arranged at two ends of the connecting shaft. The invention processes the connecting shaft which has the function of connecting and rotating the gas cylinder during curing into a porous hollow shaft, so that the air in the rotary curing furnace can enter the gas cylinder and be synchronously heated and cooled with the air outside the gas cylinder. The problem of the gas cylinder temperature gradient that appears in the gas cylinder thickness direction when rising and falling the temperature is solved, especially need the energy consumption that the inferior officer solidification led to the fact in grades to the big thickness compound material layer of high-pressure gas cylinder, the inefficiency problem has improved the inside and outside homogeneity of being heated of the compound material layer of gas cylinder simultaneously, can effectively reduce gas cylinder quality problem.)

1. The ventilation connecting shaft for curing the composite material gas cylinder is characterized in that the connecting shaft is of a hollow tubular structure, a plurality of air holes are formed in the side wall of the connecting shaft, and threads are arranged at two ends of the connecting shaft.

2. The composite material gas cylinder solidification vent connecting shaft according to claim 1, wherein the connecting shaft has a cross section of a uniform diameter hole, a variable diameter hole or a cross section of a polygonal hole.

3. The composite material gas cylinder solidification vent connecting shaft according to claim 1, wherein the gas hole is one or more combinations of a cylindrical hole, a conical hole, a drum-shaped hole, a polygonal hole, a spline hole or other profiled holes.

4. The composite material gas cylinder curing vent connecting shaft according to claim 1, wherein the hollow tube with the threaded section has an inner diameter smaller than that of the hollow tube with the non-threaded section.

5. The composite material gas cylinder curing vent connecting shaft of claim 1, wherein the direction of the center line of the gas hole is 42 ° to 48 ° from the axial direction of the connecting shaft.

6. The composite material gas cylinder curing ventilation connecting shaft as claimed in claim 1, wherein the diameter of the gas holes is 10-15 mm, and the distance between the centers of the gas holes is 30-40 mm.

7. The composite gas cylinder curing vent connecting shaft according to claim 1, wherein the connection of the thread and the gas cylinder is an "inner support" or an "outer clamp".

8. The composite material cylinder curing vent connecting shaft according to claim 1, wherein the connecting shaft is connected with a cylinder opening and fixed on a rotatable chuck or a tool.

9. The composite cylinder solidification vent connection shaft of claim 8, wherein the cylinder is an S-type composite cylinder or a T-type composite cylinder.

10. The composite cylinder curing vent connecting shaft of claim 8, wherein the composite cylinder is prepared by the following steps: and connecting the connecting shaft with the gas cylinder, placing the gas cylinder into a rotary curing furnace, wherein the opening of the connecting shaft faces to the airflow running direction, so that blast airflow can enter the gas cylinder through the connecting shaft, and the temperature inside and outside the gas cylinder can be simultaneously raised and lowered.

Technical Field

The invention belongs to the field of composite material gas cylinder preparation, and particularly relates to a ventilation connecting shaft for composite material gas cylinder solidification and a preparation and use method thereof.

Background

The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.

The composite material gas cylinder as a novel gas cylinder developed recently has the advantages of light weight, high pressure resistance, corrosion resistance, good fatigue, strong designability and the like, and has wider and wider application fields. The composite material gas cylinder is generally formed by winding continuous fiber reinforced resin matrix composite material on the surface of a metal lining or a plastic lining and then curing. In order to control the resin content of the composite material layer and ensure the uniformity of the resin content and the surface quality of the gas cylinder, the curing mode is generally that the opening of the gas cylinder is connected with a solid connecting shaft and fixed on a rotatable chuck or an equivalent tool for rotary curing. However, when the high-pressure composite material gas cylinder is prepared, the strength of the gas cylinder needs to be improved by increasing the thickness of the composite material layer, and in order to ensure the curing uniformity and the curing degree of the composite material layer, or a mode of winding for multiple times for curing is adopted, so that the working efficiency is reduced, and the energy consumption is increased; or adopt the mode of extension cooling and heating time and heat preservation time, so not only work efficiency is low, and the energy consumption is high, still can lead to composite material layer to appear "burnt tender in the outer" problem, makes the inconsistent production thermal stress of the inside and outside degree of solidification of composite material layer, then reduces gas cylinder intensity lightly, then heavily when cooling and heating because the inside and outside difference in temperature of gas cylinder is too big, makes composite material layer fracture or debond with the inner bag, leads to the gas cylinder to scrap.

Disclosure of Invention

In order to overcome the problems, the invention provides a ventilation connecting shaft for curing a composite material gas cylinder and a preparation and use method thereof. The invention processes the connecting shaft which has the function of connecting and rotating the gas cylinder during curing into a porous hollow shaft, so that the air in the rotary curing furnace can enter the gas cylinder and be synchronously heated and cooled with the air outside the gas cylinder.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

the invention provides a ventilation connecting shaft for curing a composite material gas cylinder, which is of a hollow tubular structure, wherein a plurality of air holes are formed in the side wall of the connecting shaft, and threads are arranged at two ends of the connecting shaft.

In a second aspect of the invention, there is provided an apparatus for curing a composite cylinder, comprising: and the opening of the gas cylinder is connected to the connecting shaft by any one of the connecting shafts, and the connecting shaft is fixed on a rotatable chuck or an equivalent tool.

The connecting shaft which has the function of connecting and rotating the gas cylinder during curing is processed into a porous hollow shaft, so that the air in the rotary curing furnace can enter the gas cylinder and be synchronously heated and cooled with the air outside the gas cylinder.

In a third aspect of the invention, a method for forming a composite material gas cylinder is provided, which comprises the following steps:

and connecting any connecting shaft with the gas cylinder, placing the gas cylinder into a rotary curing furnace, wherein the opening of the connecting shaft faces to the airflow running direction, so that blast airflow can enter the gas cylinder through the connecting shaft, and the temperature of the inside and the outside of the gas cylinder can be simultaneously raised and lowered. When the gas cylinder is rotated and solidified, airflow in the furnace enters the inner container of the gas cylinder, so that the temperature of the inside and the outside of the gas cylinder is synchronously increased and decreased. The problem of the gas cylinder temperature gradient that appears in the gas cylinder thickness direction when rising and falling the temperature is solved, especially need the energy consumption that the inferior officer solidification led to the fact in grades to the big thickness compound material layer of high-pressure gas cylinder, the inefficiency problem has improved the inside and outside homogeneity of being heated of the compound material layer of gas cylinder simultaneously, can effectively reduce gas cylinder quality problem.

The invention has the beneficial effects that:

(1) the ventilation connecting shaft for curing the composite material gas cylinder can enable gas flow in a furnace to enter the inner container of the gas cylinder when the gas cylinder is rotated and cured, so that the internal temperature and the external temperature of the gas cylinder are synchronously increased and decreased. The problem of the gas cylinder temperature gradient that appears in the gas cylinder thickness direction when rising and falling the temperature is solved, especially need the energy consumption that the inferior officer solidification led to the fact in grades to the big thickness compound material layer of high-pressure gas cylinder, the inefficiency problem has improved the inside and outside homogeneity of being heated of the compound material layer of gas cylinder simultaneously, can effectively reduce gas cylinder quality problem.

(2) The device has the advantages of simple structure, convenience in operation, low cost, strong practicability and easiness in large-scale production.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic view of a vent connection shaft; 1, connecting shaft surface air holes; 2: connecting threads are connected with the connecting shaft; 3: a connecting shaft axial through hole;

FIG. 2 is an assembled view of an S-shaped gas cylinder (dual port);

fig. 3 is an assembly view of a T-cylinder (single port).

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As introduced in the background art, the composite material gas cylinder aims at the problems of low curing efficiency and poor curing uniformity of the composite material layer of the prior composite material gas cylinder. Therefore, the invention provides a ventilation connecting shaft for curing a composite material gas cylinder, which is characterized in that the connecting shaft is processed into a through hole tube shape, and holes are punched on the surface of the connecting shaft as much as possible on the premise of ensuring that the connecting shaft can support the weight of the gas cylinder, so that the connecting shaft is communicated with an axial hole in the connecting shaft. When the connecting shaft is used, the opening of the connecting shaft faces the blast direction in the furnace as far as possible, so that air flow can enter the connecting shaft and then enter the inner container of the gas cylinder.

In some embodiments, the ventilation connecting shaft is suitable for a metal inner container gas cylinder, in particular an S-shaped composite material gas cylinder, namely a gas cylinder with two open ends;

in some embodiments, the diameter of the connecting shaft is not less than the diameter of the composite material gas cylinder opening, and threads at one end of the connecting shaft are matched with threads at the gas cylinder opening.

As shown in figure 1, the invention is a ventilation shaft with an axial through hole and a hole on the surface, which is manufactured by processing a common solid connecting shaft or a hollow connecting shaft, and specifically comprises a connecting shaft surface air hole 1, a connecting shaft connecting thread 2 and a connecting shaft axial through hole 3.

The axial through hole of the connecting shaft is one or a combination of a plurality of equal-diameter holes, variable-diameter holes or holes with polygonal cross sections;

the shape of the air holes on the surface of the connecting shaft is one or a combination of a cylindrical hole, a conical hole, a drum-shaped hole, a polygonal hole, a spline hole and other special-shaped holes, and the number and the size of the air holes on the surface are not limited.

The connecting thread of the connecting shaft is the preferable structural form of the invention, including but not limited to the forms of an inner support and an outer clamp which can play the equivalent connecting function with the gas cylinder.

The ventilation connecting shaft for curing the composite material gas cylinder is of a hollow tubular structure, a plurality of air holes are formed in the side wall of the connecting shaft, and threads are arranged at two ends of the connecting shaft.

The connecting shaft which has the function of connecting and rotating the gas cylinder during curing is processed into the porous hollow shaft, so that the inside and the outside of the gas cylinder are heated simultaneously, and the curing efficiency and the curing uniformity of the composite material layer are improved.

The specific structure of the connecting shaft is not particularly limited, so that in some embodiments, the cross section of the connecting shaft is a uniform-diameter hole, a variable-diameter hole or a polygonal hole to meet the requirements of different working conditions.

The concrete structure of this application to the connecting axle does not do special restriction, therefore, in some embodiments, the gas pocket is one or more combinations of cylinder hole, circular cone hole, drum shape hole, polygon hole, spline hole or other dysmorphism holes to the operation requirement of adaptation different operating modes, the processing of being convenient for simultaneously.

In some embodiments, the connecting shaft has a hollow tube with a threaded section with an inner diameter smaller than that of the hollow tube with a non-threaded section, so that the threaded section is screwed into the gas cylinder to be conveniently attached and sealed with the gas cylinder port.

In some embodiments, the direction of the central line of the air hole and the axial direction of the connecting shaft form a 42-48 degree angle, so that the flow and the flow velocity of air entering the air bottle are improved, the air can fully flow in the T-shaped composite material air bottle, and the synchronous temperature rise and fall of air outside the air bottle can be guaranteed.

In some embodiments, the diameter of the air holes is 10-15 mm, the distance between the centers of the air holes is 30-40 mm, the air inlet efficiency is improved under the condition that the holes are as few as possible, the processing is convenient, and meanwhile, the connecting shaft has better mechanical strength.

The invention also provides a device for curing the composite material gas cylinder, which comprises: and the opening of the gas cylinder is connected to the connecting shaft by any one of the connecting shafts, and the connecting shaft is fixed on a rotatable chuck or an equivalent tool.

The connecting shaft which has the function of connecting and rotating the gas cylinder during curing is processed into a porous hollow shaft, so that the air in the rotary curing furnace can enter the gas cylinder and be synchronously heated and cooled with the air outside the gas cylinder.

The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.