Manufacturing method and structure of nested conical oxygen production grain

Abstract

The invention discloses a nested conical oxygen production grain manufacturing method and structure, and relates to the technical field of oxygen production grain processing, and the nested conical oxygen production grain manufacturing method comprises the steps that oxygen production main powder is put into a mold cavity and pressed through a main pressing head to obtain a conical main grain; a central groove of the conical main grain is filled with ignition powder for pressing, and an ignition-main grain is obtained; a piezoelectric resistance electric heating fuse and ignition powder are placed in the center of the ignition-main grain; pressing the ignition-main grain, the ignition powder and the anti-piezoelectric hot fuze to obtain an oxygen production grain; the electric heating wire of the anti-voltage electric heating fuse keeps the shape of the electric heating wire framework. According to the invention, mutual wrapping of three agents is ensured through a nested conical shape, so that the ignition agent can be fully ignited, and the oxygen production agent can be fully ignited by the ignition agent. Through the buried anti-voltage electric heating wire and the skeleton structure, the electric heating wire is ensured to be buried in the pressed ignition powder in a fixed structure, and the performance of the electric heating wire is fully exerted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oxygen generating cartridge processing, in particular to a nested conical oxygen generating cartridge manufacturing method and structure. BACKGROUND

[0002] As a functional agent that can quickly generate oxygen, the oxygen generating cartridge is widely used in emergency medical treatment, high altitude oxygen supply, and emergency oxygen supply in enclosed spaces. Its working principle is to release oxygen through the thermal decomposition reaction of the agent, and the ignition link is the key step to start this reaction, which directly determines whether the oxygen generating cartridge can quickly and stably enter the working state. In the emergency oxygen supply scene, the reliability of ignition is even directly related to the safety of the user, therefore, efficient and stable ignition technology is one of the core guarantees for the practicality of the oxygen generating cartridge.

[0003] Currently, the electric heating ignition scheme widely used in the industry is the "ignition agent - oxygen generating cartridge end face butt joint" structure, which is specifically set as follows: first, the ignition agent is made into a block or sheet structure matching the size of the end face of the oxygen generating cartridge, and the ignition agent is tightly attached to the end face of the oxygen generating cartridge by mechanical pressing or bonding; then, the electric heating ignition device (usually an electric heating wire or a bridge type electric ignition head) is fixed on the side end face of the ignition agent away from the oxygen generating cartridge, the electric heating ignition device generates Joule heat by receiving an electric signal, ignites the ignition agent first, and then relies on the heat generated by the combustion of the ignition agent to transfer to the end face of the oxygen generating cartridge, thereby triggering the overall combustion decomposition of the oxygen generating cartridge.

[0004] In the prior art, there are natural limitations in the heat transfer path: the heat generated by the electric heating ignition device first acts on the end face of the ignition agent, which needs to make the entire ignition agent burn first, and then realizes heat conduction through the contact between the ignition agent and the end face of the oxygen generating cartridge. Due to the limited contact area of the end face, and the heat generated by the combustion of the ignition agent is easily lost to the surrounding environment, the heat transfer efficiency is low, and there is a significant delay from receiving the ignition signal to completely starting the combustion of the oxygen generating cartridge, which cannot meet the demand for rapid oxygen supply in emergency scenarios. At the same time, uneven heat distribution also causes the end face of the oxygen generating cartridge to burn locally first and the overall combustion to be out of sync, further affecting the stability of oxygen release.

[0005] The end face bonding effect of the ignition charge and the oxygen generating charge column is easily affected by factors such as machining precision, assembly process and environmental humidity. If there is a gap or the bonding is not firm between the two contact surfaces, it will cause the interruption of heat transfer, even if the ignition charge successfully burns, it may also cause ignition failure due to the inability of heat to be effectively transferred to the oxygen generating charge column. On the other hand, the electric heating ignition device only acts on the single end face of the ignition charge. If there is a local composition unevenness or density defect in the ignition charge, it may cause insufficient combustion or flameout, unable to form a sustained and stable heat source, thereby causing the ignition failure of the oxygen generating charge column. In addition, in a low temperature environment, the efficiency of the end face contact type heat transfer is further reduced, and the probability of ignition failure is significantly increased. SUMMARY

[0006] The embodiment of the present application provides a nested cone type oxygen generating charge column manufacturing method and structure, to solve the problem that in the prior art, the end face bonding effect of the ignition charge and the oxygen generating charge column is easily affected by factors such as machining precision, assembly process and environmental humidity; the electric heating ignition device only acts on the single end face of the ignition charge. If there is a local composition unevenness or density defect in the ignition charge, it may cause insufficient combustion or flameout, unable to form a sustained and stable heat source, thereby causing the ignition failure of the oxygen generating charge column.

[0007] In one aspect, the embodiment of the present application provides a nested cone type oxygen generating charge column manufacturing method, comprising: putting the oxygen generating main charge into the model cavity and pressing by the main pressure head to obtain a conical main charge column; filling the ignition charge in the center groove of the conical main charge column and pressing to obtain an ignition-main charge column putting the compression-resistant electric heat fuse and the ignition powder into the recess at the center point of the ignition-main charge column; pressing the ignition-main charge column, the ignition powder and the compression-resistant electric heat fuse by the pressure head to obtain an oxygen generating charge column; The electric heating wire skeleton of the compression-resistant electric heat fuse is broken after pressing, and the electric heating wire of the compression-resistant electric heat fuse maintains the shape of the electric heating wire skeleton.

[0008] In one possible implementation, the ignition point of the oxygen generating main charge, the ignition charge and the ignition powder decreases in turn.

[0009] In one possible implementation, the oxygen generating main charge, the ignition charge and the ignition powder are concentrically arranged, and the end faces of the oxygen generating main charge, the ignition charge and the ignition powder are pressed at the same level by the model.

[0010] In another aspect, the embodiment of the present application provides a nested conical oxygen production propellant structure, comprising: an oxygen production main propellant, which is a conical propellant, the top end face of the oxygen production main propellant is provided with an ignition propellant, the ignition propellant is a conical propellant, the ignition propellant is the same shape as the oxygen production main propellant, the top end face of the ignition propellant is flush with the top end face of the oxygen production main propellant, the ignition propellant is nested on the conical propellant of the oxygen production main propellant by pressing method, the top end face of the ignition propellant is provided with a compression-resistant electrothermal fuse and an ignition charge, the compression-resistant electrothermal fuse is arranged between the ignition propellant and the ignition charge, and the main body of the compression-resistant electrothermal fuse is embedded in the ignition charge.

[0011] In a possible implementation manner, the compression-resistant electrothermal fuse comprises an electrothermal wire and an electrothermal wire skeleton.

[0012] In a possible implementation manner, the electrothermal wire skeleton is a cylindrical ceramic skeleton, and an electrothermal wire groove is arranged on the electrothermal wire skeleton, and the electrothermal wire is wound on the electrothermal wire groove.

[0013] The nested conical oxygen production propellant manufacturing method and structure in the present application have the following advantages: (1) The nested conical molding ensures that the three kinds of propellants are wrapped with each other, so that the ignition charge can fully ignite the ignition propellant, and the ignition propellant can fully ignite the oxygen production propellant.

[0014] (2) The embedded compression-resistant electrothermal wire and skeleton structure ensure that the electrothermal wire is embedded in the pressed ignition charge in a fixed structure, and the performance of the electrothermal wire is fully utilized. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Figure 1 A flowchart of a nested conical oxygen production propellant manufacturing method provided by the embodiment of the present application is provided. Figure 2 A schematic diagram of a nested conical oxygen production propellant structure provided by the embodiment of the present application is provided. Figure 3 An electrothermal wire skeleton schematic diagram of a nested conical oxygen production propellant structure provided by the embodiment of the present application is provided.

[0017] Explanation of reference numerals in the drawings: 1, oxygen production main propellant; 2, ignition propellant; 3, ignition charge; 4, compression-resistant electrothermal fuse; 41, electrothermal wire; 42, electrothermal wire skeleton. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be apparently and completely described in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] Figure 1 A flow chart of a nested cone type oxygen production propellant grain manufacturing method is provided in the embodiments of the present application. The embodiments of the present application provide a nested cone type oxygen production propellant grain manufacturing method, which comprises the following steps: The oxygen production main propellant 1 is put into a model cavity and is pressed by a main pressure head to obtain a conical main propellant grain. The ignition propellant 2 is filled in the central groove of the conical main propellant grain and is pressed to obtain an ignition-main propellant grain. The compression-resistant electric hot fuse 4 and the ignition powder 3 are put into the recess at the center point of the ignition-main propellant grain. The ignition-main propellant grain, the ignition powder 3 and the compression-resistant electric hot fuse 4 are pressed by a pressure head to obtain a propellant grain. The electric heating wire skeleton 42 of the compression-resistant electric hot fuse 4 is broken after pressing, and the electric heating wire 41 of the compression-resistant electric hot fuse 4 maintains the shape of the electric heating wire skeleton 42.

[0020] The ignition points of the oxygen production main propellant 1, the ignition propellant 2 and the ignition powder 3 decrease in turn.

[0021] The oxygen production main propellant 1, the ignition propellant 2 and the ignition powder 3 are concentrically arranged, and the end faces of the oxygen production main propellant 1, the ignition propellant 2 and the ignition powder 3 are pressed in the same level by a model.

[0022] Exemplarily, the propellant grain is manufactured by a conical structure mold, the oxygen production main propellant 1, the ignition propellant 2 and the ignition powder 3 are pressed in a nested structure to become a nested structure conical propellant grain in turn, and the electric heating wire skeleton 42 is used for pressure bearing to ensure that the electric heating wire 41 will not be disconnected during the propellant grain manufacturing process.

[0023] The embodiment of the present application provides a nested cone type oxygen production propellant grain structure, which comprises: an oxygen production main propellant 1, the oxygen production main propellant is a conical propellant grain, the top end face of the oxygen production main propellant 1 is provided with an ignition propellant 2, the ignition propellant 2 is a conical propellant grain, the ignition propellant 2 is the same as the oxygen production main propellant 1 in shape, the top end face of the ignition propellant 2 is flush with the top end face of the oxygen production main propellant 1, the ignition propellant 2 is nested on the conical propellant grain of the oxygen production main propellant 1 by a pressing method, the top end face of the ignition propellant 2 is provided with an anti-pressure electrothermal fuse 4 and an ignition powder 3, the anti-pressure electrothermal fuse 4 is arranged between the ignition propellant 2 and the ignition powder 3, and the main body of the anti-pressure electrothermal fuse 4 is embedded in the ignition powder 3.

[0024] The anti-pressure electrothermal fuse 4 comprises an electrothermal wire 41 and an electrothermal wire skeleton 42.

[0025] The electrothermal wire skeleton 42 is a cylindrical ceramic skeleton, the electrothermal wire skeleton 42 is provided with an electrothermal wire groove, and the electrothermal wire 41 is wound on the electrothermal wire groove.

[0026] As shown in the examples, Figure 2 , 3 The oxygen production main propellant 1 is in a conical structure at the outermost side, the upper top surface of the conical structure of the oxygen production main propellant 1 is provided with a conical recess, the ignition propellant 2 is arranged in the conical recess, the upper top surface of the conical structure of the ignition propellant 2 is provided with a conical recess, the main body part of the ignition powder 3 and the anti-pressure electrothermal fuse 4 is arranged in the conical recess of the ignition propellant 2, and the propellant grain shape is obtained by pressing. When pressing, the pressure can cause the fuse and the electrothermal wire of the anti-pressure electrothermal fuse 4 to break, therefore, the ceramic skeleton of the electrothermal wire skeleton 42 bears the pressure. The electrothermal wire 41 is wound on the electrothermal wire groove of the electrothermal wire skeleton 42, and the whole is in a solenoid structure, which is convenient for releasing heat energy. The electrothermal wire skeleton 42 bears the pressure of propellant grain production, and the electrothermal wire skeleton 42 is breakable. Even if it is broken when bearing the pressure of propellant grain production, the broken electrothermal wire 41 still presents a solenoid structure, and the electrothermal wire 41 can not be broken when being pressed, thereby ensuring smooth ignition of the device.

[0027] The oxygen production main propellant 1 and the ignition propellant 2 are arranged in the conical recess, the ignition propellant 2 and the ignition powder 3 are designed in a nested structure and are wrapped with each other, the electrothermal wire 41 is fully embedded in the ignition powder 3, when ignition, the ignition powder 3 is ignited first, then the ignition propellant 2 is ignited through the nested structure with the maximum area, and the ignition propellant 2 further ignites the oxygen production main propellant 1 through the nested structure with the maximum limit to start oxygen production.

[0028] In a possible embodiment, the electrothermal wire skeleton 42 can also be an electrothermal sheet electrically connected with the electrothermal wire 41, the electrothermal sheet is arranged in one of wave-shaped, cylindrical or arched pressure bearing structures, the electrothermal sheet bears the pressure of propellant grain production, the electrothermal wire 41 and the electrothermal sheet are not broken when the propellant grain is pressed, and the subsequent electrothermal effect is ensured.

[0029] While the preferred embodiments of the application have been described, additional variations and modifications can be made to these embodiments by those skilled in the art once they have the benefit of the present disclosure without departing from the spirit and scope of the application. Accordingly, it is intended that the appended claims include all such modifications and variations as fall within the scope of the present application.

[0030] It is apparent that those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. It is therefore intended that the present application cover all such changes and modifications that are within its scope.

Claims

1. A method for manufacturing a nested cone-shaped oxygen-generating column, characterized in that, The application relates to an oxygen-generating propellant column. The oxygen-generating main propellant (1) is put into a model cavity and pressed by a main pressure head to obtain a conical main propellant column; The ignition propellant (2) is filled into the central groove of the conical main propellant column and pressed to obtain an ignition-main propellant column The compression-resistant electric hot fuse (4) and the ignition propellant (3) are put into the recess at the central point of the ignition-main propellant column; The ignition-main propellant column, the ignition propellant (3) and the compression-resistant electric hot fuse (4) are pressed by a pressure head to obtain the oxygen-generating propellant column. The electric heating wire skeleton (42) of the compression-resistant electric hot fuse (4) is broken after pressing, and the electric heating wire (41) of the compression-resistant electric hot fuse (4) maintains the shape of the electric heating wire skeleton (42).

2. The method of claim 1, wherein the method is characterized by: The ignition points of the oxygen-generating main propellant (1), the ignition propellant (2) and the ignition propellant (3) are sequentially decreased.

3. The method of claim 1, wherein the method further comprises: The oxygen-generating main propellant (1), the ignition propellant (2) and the ignition propellant (3) are concentrically arranged, and the end faces of the oxygen-generating main propellant (1), the ignition propellant (2) and the ignition propellant (3) are pressed on the same level by a model.

4. A nested conical shaped oxygen generating charge column structure, characterized by, The oxygen-generating main propellant (1) is a conical propellant column, the top end face of the oxygen-generating main propellant (1) is provided with the ignition propellant (2), the ignition propellant (2) is a conical propellant column, the ignition propellant (2) is the same as the oxygen-generating main propellant (1) in shape, the top end face of the ignition propellant (2) is flush with the top end face of the oxygen-generating main propellant (1), the ignition propellant (2) is nested on the conical propellant column of the oxygen-generating main propellant (1) by pressing, the top end face of the ignition propellant (2) is provided with the compression-resistant electric hot fuse (4) and the ignition propellant (3), the compression-resistant electric hot fuse (4) is arranged between the ignition propellant (2) and the ignition propellant (3), and the main body of the compression-resistant electric hot fuse (4) is embedded in the ignition propellant (3).

5. The nested conical oxygen cylinder structure of claim 4, wherein The compression-resistant electric hot fuse (4) comprises an electric heating wire (41) and an electric heating wire skeleton (42).

6. The nested conical oxygen cylinder structure of claim 5, wherein The electric heating wire skeleton (42) is a cylindrical ceramic skeleton, the electric heating wire skeleton (42) is provided with an electric heating wire groove, and the electric heating wire (41) is wound on the electric heating wire groove.

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