A liquid igniter storage device

Abstract

The application discloses a liquid igniter storage device, belonging to the technical field of igniter storage, comprising a storage box and a metal diaphragm box assembly; the storage box comprises a storage box body, a liquid cavity cover and a gas cavity cover; the liquid cavity cover is capped at one end of the storage box body, and the gas cavity cover is capped at the other end of the storage box body; the metal diaphragm box assembly is arranged in the storage box and divides the inner cavity of the storage box into a gas cavity and a liquid cavity; the metal diaphragm box assembly comprises a telescopic metal diaphragm box and a diaphragm box head, the opening end of the diaphragm box head is fixedly connected with the first end of the telescopic metal diaphragm box, and the other end of the telescopic metal diaphragm box is fixedly connected with the liquid cavity cover. The telescopic metal diaphragm box, the diaphragm box head and the liquid cavity cover are integrated, so that the structural dead weight can be effectively reduced, and the structural complexity is reduced.

Description

Technical Field

[0001] This invention relates to the field of ignition agent storage technology, and in particular to a liquid ignition agent storage device. Background Technology

[0002] With the increasing urgency of reusable liquid rocket engines requiring multiple ignitions and intermittent firing, conventional solid propellant igniters only support single ignition. Multiple ignitions require multiple sets of devices connected in parallel, resulting in structural redundancy, low space utilization, and an inability to adapt to high-frequency ignition requirements, thus failing to meet engineering requirements. Therefore, self-igniting liquid igniters with reusable ignition, stable ignition energy, and fast response speed have become the optimal ignition solution for reusable rocket engines.

[0003] Liquid ignition propellants are highly chemically reactive, prone to spontaneous combustion, and highly corrosive, placing stringent requirements on the sealing, isolation, pressure stability, and reliability of storage and supply devices during repeated opening and closing. Existing liquid ignition propellant storage devices suffer from poor structural integration, complex structures, and low reliability, making it difficult to meet the long-term stable storage and precise supply requirements of ignition propellants for multiple ignitions in liquid rocket engines, and even leading to test failures.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a liquid ignition agent storage device that integrates a telescopic metal diaphragm box with the diaphragm box head and the liquid chamber cover, which can effectively reduce structural dead weight and structural complexity.

[0006] A liquid ignition agent storage device includes: a storage tank and a metal diaphragm assembly; The storage tank includes a storage tank body, a liquid chamber cover, and a gas chamber cover; the liquid chamber cover is sealed at one end of the storage tank body, and the gas chamber cover is sealed at the other end of the storage tank body; The metal membrane assembly is disposed inside the storage tank, dividing the inner cavity of the storage tank into a gas cavity and a liquid cavity; The metal diaphragm assembly includes a telescopic metal diaphragm and a diaphragm end cap. The open end of the diaphragm end cap is fixedly connected to the first end of the telescopic metal diaphragm, and the other end of the telescopic metal diaphragm is fixedly connected to the liquid chamber cover.

[0007] Preferably, the open end of the membrane box end cap is in communication with the air cavity, and the telescopic metal membrane box is sleeved on the outside of the membrane box end cap; The membrane box end cap is equipped with a welding cutter head, which is fixedly connected to the telescopic metal membrane box by welding process; The liquid chamber cover is equipped with a welding blade, which is fixedly connected to the telescopic metal diaphragm box by welding.

[0008] Preferably, the shape and size of the inner wall of the liquid cavity cover are consistent with the outer wall of the membrane cap.

[0009] Preferably, it also includes a magnetic induction device for real-time monitoring of the remaining ignition dose in the tank.

[0010] Preferably, the membrane box end cap is provided with a plurality of protrusions, and the protrusions are provided with mounting holes for mounting the magnetic induction device.

[0011] Preferably, the end of the diaphragm box is provided with an annular groove in the circumferential direction; the annular groove includes an inner annular groove and an outer annular groove that are interconnected. A first guide pad capable of radial movement is slidably disposed within the outer annular groove; the first guide pad is slidably connected to the inner wall of the storage tank; an annular spring capable of tightly contacting the circumferential outer wall of the first guide pad with the inner wall of the storage tank is installed within the inner annular groove.

[0012] Preferably, a connecting ring is provided between the circumferential outer wall of the membrane box head body and the inner wall of the storage tank; the connecting ring has an annular groove in its outer circumference, and a second guide pad is provided in the annular groove; the second guide pad is slidably connected to the inner wall of the storage tank, and the outer circumference of the second guide pad is tightly fitted to the inner wall of the storage tank.

[0013] Preferably, both the first guide pad and the second guide pad are made of polytetrafluoroethylene (PTFE).

[0014] Preferably, the inner wall surface of the liquid cavity cover is provided with an air guide groove.

[0015] Preferably, it also includes a liquid passage tee fixedly connected to the liquid cavity cover and an air passage tee fixedly connected to the air cavity cover; The first passage of the liquid circuit tee is connected to the liquid chamber, the second passage is equipped with a liquid circuit hand valve, and the third passage is equipped with a filling valve. The first passage of the three-way air passage is connected to the air chamber, the second passage is equipped with an air passage manual valve, and the third passage is connected to an air supply valve.

[0016] Compared with the prior art, this application has at least the following beneficial effects: 1. This invention integrates the telescopic metal diaphragm box with the diaphragm box head and the liquid cavity cover, which can effectively reduce the structural dead weight and reduce the structural complexity.

[0017] 2. This invention utilizes a magnetic induction device to monitor the remaining amount of ignition agent, significantly improving the reliability of the ignition agent supply device.

[0018] 3. The present invention provides a gas guide channel on the ignition agent chamber cover, which can improve the vacuum rate during ignition agent filling and the air venting rate during ignition agent discharge, thereby improving product reliability.

[0019] 4. The present invention provides an annular spring on the diaphragm end cap to support the first guide pad, which can improve the guiding effect of the diaphragm end cap, ensure the stability of the metal diaphragm assembly along the axial direction, and improve product reliability. Attached Figure Description

[0020] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the liquid ignition agent storage device of the present invention; Figure 2 This is a schematic diagram of the cavity cover in the liquid ignition agent storage device of the present invention; Figure 3 This is a schematic diagram of the structure of the guide pad in the liquid ignition agent storage device of the present invention; Figure 4 This is a schematic diagram of the structure of the annular spring in the liquid ignition agent storage device of the present invention.

[0021] The above figures include the following reference numerals: 1. Air chamber cover; 2. Storage tank body; 3. Liquid chamber cover; 4. Air chamber; 5. Liquid chamber; 6. Diaphragm end cap; 7. Telescopic metal diaphragm; 8. Magnetic induction device; 9. Ring spring; 10. First guide pad; 11. Second guide pad; 12. Connecting ring; 13. Filling valve. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] like Figures 1-3As shown, a liquid ignition agent storage device includes a storage tank and a metal diaphragm assembly. The storage tank includes a tank body 2, a liquid chamber cover 3, and a gas chamber cover 1. The liquid chamber cover 3 seals one end of the storage tank body 2, and the gas chamber cover 1 seals the other end of the storage tank body 2. The metal diaphragm assembly is disposed inside the storage tank, dividing the inner cavity of the storage tank into a gas chamber 4 and a liquid chamber 5. The inner diameter and length of the storage tank body 2 are reverse-engineered according to the volume requirements of the ignition agent, and can be adjusted according to the supply requirements of the ignition agent.

[0024] The metal diaphragm assembly includes a telescopic metal diaphragm 7 and a diaphragm end cap 6. The open end of the diaphragm end cap 6 is fixedly connected to the first end of the telescopic metal diaphragm 7, and the other end of the telescopic metal diaphragm 7 is fixedly connected to the liquid chamber cover 3. Integrating the telescopic metal diaphragm 7 and the diaphragm end cap 6 effectively reduces structural complexity and weight, improving reliability. The telescopic metal diaphragm 7 can undergo axial stretching or compression along the axis of the tank body under axial force, thereby achieving volume changes in the gas chamber 4 and the liquid chamber 5. When the pressure in the gas chamber 4 is greater than that in the liquid chamber 5, the liquid igniter in the liquid chamber 5 can be squeezed out, thus supplying the igniter.

[0025] In this embodiment, the diaphragm cap 6 is equipped with a welding blade and is fixedly connected to the telescopic metal diaphragm 7 by welding. Simultaneously, the liquid chamber cover 3 is equipped with a welding blade and is fixedly connected to the telescopic metal diaphragm 7 by welding.

[0026] Furthermore, the open end of the diaphragm head 6 is connected to the gas chamber 4, and the telescopic metal diaphragm 7 is fitted onto the outside of the diaphragm head 6. At the same time, the shape and size of the inner wall of the liquid chamber cover 3 are consistent with the outer wall of the diaphragm head 6, so that when the liquid chamber 5 is in its minimum state as the diaphragm head 6 moves, the ignition agent can be completely emptied, effectively improving the ignition agent evacuation rate.

[0027] In another embodiment of the present invention, a liquid ignition agent storage device further includes a magnetic induction device 8 for real-time monitoring of the remaining ignition agent dosage in the storage tank. The diaphragm cap 6 is provided with multiple protrusions, each with a mounting hole, through which the magnetic induction device 8 is fixed.

[0028] In this embodiment, the magnetic induction device 8 is a magnetic induction probe equipped with a permanent magnet. It relies on an external magneto-electric sensor to obtain the real-time displacement of the probe, and then obtains the remaining ignition dose in the tank.

[0029] Furthermore, an annular groove is provided circumferentially at the end of the diaphragm cap 6. This annular groove includes an inner annular groove and an outer annular groove that are interconnected, with the outer annular groove being wider than the inner annular groove. A first guide pad 10, capable of radial movement, is slidably disposed within the outer annular groove and is slidably connected to the inner wall of the storage tank body 2. An annular spring 9 is installed within the inner annular groove, ensuring close contact between the circumferential outer wall of the first guide pad 10 and the inner wall of the storage tank body 2. The annular spring 9 provides radial support force, ensuring the reliability of the guiding effect of the diaphragm cap 6. The annular spring 9 has a helical circular structure, such as... Figure 4 As shown.

[0030] Meanwhile, a connecting ring 12 is provided between the circumferential outer wall of the main body of the diaphragm box head 6 and the inner wall of the storage tank body 2. The connecting ring 12 has an annular groove on its outer circumference, and a second guide pad 11 is provided in the annular groove. The second guide pad 11 is slidably connected to the inner wall of the storage tank body 2, and the outer circumference of the second guide pad 11 is tightly fitted to the inner wall of the storage tank body 2. The connecting ring 12 can provide radial support for the diaphragm box head 6, and with the cooperation of the first guide pad 10, prevents the metal diaphragm box assembly from experiencing axial and radial instability.

[0031] It should be noted that both the first guide pad 10 and the second guide pad 11 have a "C" shape structure, rather than an "O" shape structure, which allows for the presence of gaps. This ensures that when the diaphragm assembly is compressed, there will be no pressure buildup on either side of the first guide pad 10 and the second guide pad 11, guaranteeing the effective extrusion of the ignition agent. Furthermore, it should be noted that since the gas chamber 4 and the liquid chamber 5 are isolated by the metal diaphragm assembly and are not sealed by the first guide pad 10 and the second guide pad 11, the first guide pad 10 and the second guide pad 11 only serve a guiding function.

[0032] In addition, the inner diameter of the tank body 2 is designed in coordination with the telescopic metal diaphragm box 7, the diaphragm box end cap 6, and the connecting ring 12, which can ensure that the connecting ring 12 has a good guiding effect inside the tank.

[0033] Preferably, both the first guide pad 10 and the second guide pad 11 are made of polytetrafluoroethylene material.

[0034] Furthermore, a liquid ignition agent storage device also includes a liquid passage tee fixedly connected to the liquid chamber cover 3 and a gas passage tee fixedly connected to the gas chamber cover 1. The first passage of the liquid passage tee is connected to the liquid chamber 5, the second passage is equipped with a liquid passage manual valve, and the third passage is equipped with a filling valve 13. The first passage of the gas passage tee is connected to the gas chamber 4, the second passage is equipped with a gas passage manual valve, and the third passage is connected to a gas supply valve.

[0035] Furthermore, a gas guide groove is provided on the inner wall surface of the liquid chamber cover 3. The gas guide groove provides a gas flow channel between the liquid chamber cover 3 and the diaphragm head 6, ensuring nitrogen purging before adding ignition agent to the tank, and enabling the complete removal of non-inert gases from the inner cavity during vacuuming operations, reducing operational risks and improving product reliability.

[0036] During operation, the process is divided into three stages: ignition agent loading, ignition agent storage, and ignition agent discharge.

[0037] Ignition agent charging stage: Nitrogen purging and vacuuming of liquid chamber 5 are performed through the liquid circuit tee. The charging valve 13 is opened, and ignition agent is positively charged into liquid chamber 5 through the charging port on the liquid chamber cover 3. After the ignition agent charging is complete, the charging valve 13 is closed.

[0038] During the ignition agent charging stage, the amount of ignition agent charged can be monitored by the magnetic induction device 8.

[0039] Ignition agent storage stage: The diaphragm end cap 6 and the telescopic metal diaphragm 7 together constitute the isolation device between the liquid chamber 5 and the gas chamber 4, which effectively separates the liquid chamber 5 and the gas chamber 4, and facilitates the long-term storage of the ignition agent in the liquid chamber 5.

[0040] During the ignition agent storage phase, the liquid and gas manual valves are closed, and the safety devices are activated to prevent accidental operation.

[0041] Ignition agent discharge stage: Open the gas circuit hand valve and the liquid circuit hand valve to fill the gas chamber 4 with pressurized gas. At this time, the diaphragm head 6 moves axially towards the liquid chamber 5, the telescopic metal diaphragm 7 is compressed, and the ignition agent is discharged from the liquid circuit hand valve.

[0042] During the ignition agent discharge stage, the remaining amount of ignition agent can be monitored in real time by the magnetic induction device 8.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A liquid ignition agent storage device, characterized in that, include: Storage tank and metal diaphragm assembly; The storage tank includes a storage tank body, a liquid chamber cover, and a gas chamber cover; the liquid chamber cover is sealed at one end of the storage tank body, and the gas chamber cover is sealed at the other end of the storage tank body; The metal membrane assembly is disposed inside the storage tank, dividing the inner cavity of the storage tank into a gas cavity and a liquid cavity; The metal diaphragm assembly includes a telescopic metal diaphragm and a diaphragm end cap. The open end of the diaphragm end cap is fixedly connected to the first end of the telescopic metal diaphragm, and the other end of the telescopic metal diaphragm is fixedly connected to the liquid chamber cover.

2. The liquid ignition agent storage device as described in claim 1, characterized in that, The opening end of the diaphragm box is connected to the air cavity, and the telescopic metal diaphragm box is sleeved on the outside of the diaphragm box head; The membrane box end cap is equipped with a welding cutter head, which is fixedly connected to the telescopic metal membrane box by welding process; The liquid chamber cover is equipped with a welding blade, which is fixedly connected to the telescopic metal diaphragm box by welding.

3. The liquid ignition agent storage device as described in claim 2, characterized in that, The shape and size of the inner wall of the liquid cavity cover are consistent with the outer wall of the diaphragm head.

4. The liquid ignition agent storage device as described in claim 1, characterized in that, It also includes a magnetic induction device for real-time monitoring of the remaining ignition dose in the tank.

5. The liquid ignition agent storage device as described in claim 4, characterized in that, The membrane box end cap is provided with multiple protrusions, and the protrusions are provided with mounting holes for installing magnetic induction devices.

6. The liquid ignition agent storage device as described in claim 1, characterized in that, The end cap of the diaphragm box is provided with an annular groove in the circumferential direction; the annular groove includes an inner annular groove and an outer annular groove that are interconnected. A first guide pad capable of radial movement is slidably disposed within the outer annular groove; the first guide pad is slidably connected to the inner wall of the storage tank; an annular spring capable of tightly contacting the circumferential outer wall of the first guide pad with the inner wall of the storage tank is installed within the inner annular groove.

7. The liquid ignition agent storage device as described in claim 6, characterized in that, A connecting ring is provided between the outer circumferential wall of the membrane box head body and the inner wall of the storage tank; the outer circumferential of the connecting ring is provided with an annular groove, and a second guide pad is provided in the annular groove; the second guide pad is slidably connected to the inner wall of the storage tank, and the outer circumferential of the second guide pad is tightly fitted to the inner wall of the storage tank.

8. The liquid ignition agent storage device as described in claim 6 or 7, characterized in that, Both the first guide pad and the second guide pad are made of polytetrafluoroethylene (PTFE).

9. The liquid ignition agent storage device as described in claim 1, characterized in that, The inner wall surface of the liquid cavity cover is provided with an air guide groove.

10. The liquid ignition agent storage device as described in claim 1 or 9, characterized in that, It also includes a liquid passage tee fixedly connected to the liquid cavity cover and an air passage tee fixedly connected to the air cavity cover; The first passage of the liquid circuit tee is connected to the liquid chamber, the second passage is equipped with a liquid circuit hand valve, and the third passage is equipped with a filling valve. The first passage of the three-way air passage is connected to the air chamber, the second passage is equipped with an air passage manual valve, and the third passage is connected to an air supply valve.

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