A quick-assembly and disassembly structure for a throttling capillary tube resistant to bending and torsion.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-08-14
AI Technical Summary
[0003]传统连接需要将毛细节流管进行焊接处理，毛细节流管外径小(约1-2mm)，壁面薄(百微米量级)导致焊接难度大，工艺复杂，同时由于焊接为硬连接，因安装时两端预留距离偏差，紧固件旋转力矩等会使焊接部位受拉力、压力、旋转力矩等，容易出现裂纹，导致推进剂泄漏而失效
[0005]基于上述拆装结构，相比于传统硬连接方式能够将毛细节流管结构进行快速拆装，节约了操作时间，降低了实验准备以及调试过程中的时间成本，避免了传统焊接的节流毛细管在安装替换时容易因两端活动连接件在拧紧时受旋转力矩导致节流管焊接处产生裂纹，导致推进剂泄漏而失效。
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Figure CN122566029A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of electric propulsion propellant supply systems, specifically, it is a quick-assembly and disassembly structure for a throttling capillary tube that resists bending and torsion. Background Technology
[0002] The hollow cathode and thruster in the electric propulsion system require a certain pressure during operation, thus requiring a propellant with a certain pressure and a stable supply at a certain flow rate. This requires the throttle device to throttle the propellant produced in the tank in order to obtain the propellant with the required pressure and flow rate.
[0003] Traditional connections require welding capillary filaments. The small outer diameter (approximately 1-2 mm) and thin wall (on the order of hundreds of micrometers) of capillary filaments make welding difficult and the process complex. Furthermore, since welding is a rigid connection, the welded area is subject to tensile, compressive, and rotational forces due to pre-existing distance deviations at both ends during installation and the rotational torque of fasteners. This can easily lead to cracks, causing propellant leakage and failure. Summary of the Invention
[0004] To address the deficiencies in the prior art, this application provides a quick-release and disassembly structure for a throttling capillary tube, comprising: a pipeline (1), a shut-off component (2), a large-diameter elastic tube (3), a small-diameter elastic tube (4), and a first throttling capillary tube (5); the pipeline (1) is connected to the first end of the large-diameter elastic tube (3), and the shut-off component (2) secures and seals the interface; the second end of the large-diameter elastic tube (3) is connected to the first end of the small-diameter elastic tube (4), the second end of the small-diameter elastic tube (4) is connected to the first throttling capillary tube (5), and the shut-off component (2) secures and seals the interface.
[0005] Based on the above disassembly and assembly structure, compared with the traditional hard connection method, the capillary throttling tube structure can be quickly disassembled and assembled, saving operation time and reducing the time cost in the experimental preparation and debugging process. It avoids the problem that the traditional welded throttling capillary tube is prone to cracking at the weld joint of the throttling tube due to the rotational torque when the movable connecting parts at both ends are tightened during installation and replacement, which can lead to propellant leakage and failure.
[0006] In the above disassembly and assembly structure, the outer diameter of the first throttling capillary (5) is greater than the inner diameter of the small inner diameter elastic tube (4), the outer diameter of the small inner diameter elastic tube (4) is greater than the inner diameter of the large inner diameter elastic tube (3), and the outer diameter of the large inner diameter elastic tube (3) is smaller than the inner diameter of the pipeline (1).
[0007] In the above disassembly and assembly structure, the stop component (2) includes an O-ring seal and an elastic clamp.
[0008] In the above disassembly and assembly structure, during disassembly, the stop component (2) is loosened, the small inner diameter elastic tube (4) and the first throttling capillary tube (5) are removed, the second end of the small inner diameter elastic tube (4) is connected to the second throttling capillary tube (6), the first end of the small inner diameter elastic tube (4) is connected to the second end of the large inner diameter elastic tube (3), and the interface is tightened and sealed with the stop component (2) to realize the replacement and sealing of the test capillary tube.
[0009] In the above disassembly and assembly structure, the pipeline (1) is used to transport the propellant. Attached Figure Description
[0010] Figure 1 According to some embodiments of this application, a schematic diagram of a quick-assembly and disassembly structure for a throttling capillary is shown.
[0011] Figure 2 According to some embodiments of this application, a cross-sectional schematic diagram of a quick-assembly and disassembly structure for a throttling capillary is shown. Detailed Implementation
[0012] The present application will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.
[0013] The present application will now be described in further detail with reference to the accompanying drawings:
[0014] The following is combined Figure 1 , Figure 2 This application introduces a quick-assembly and disassembly structure for a throttling capillary tube that resists bending and torsion. Figure 1 A schematic diagram of a quick-assembly and disassembly structure for a throttling capillary tube is shown. Figure 2 This is the corresponding axial cross-sectional view. For example... Figure 1 As shown, a quick-release and disassembly structure for a throttling capillary includes: a pipeline (1), a shut-off component (2), a large-diameter elastic tube (3), a small-diameter elastic tube (4), and a first throttling capillary (5); the pipeline (1) is connected to the first end of the large-diameter elastic tube (3), and the shut-off component (2) tightens and seals the interface by means of the elastic seal of the elastic tube; the second end of the large-diameter elastic tube (3) is connected to the first end of the small-diameter elastic tube (4), the second end of the small-diameter elastic tube (4) is connected to the first throttling capillary (5), and the shut-off component (2) tightens and seals the interface.
[0015] In some embodiments, the outer diameter of the first throttling capillary (5) is larger than the inner diameter of the small inner diameter elastic tube (4), the outer diameter of the small inner diameter elastic tube (4) is larger than the inner diameter of the large inner diameter elastic tube (3), and the outer diameter of the large inner diameter elastic tube (3) is smaller than the inner diameter of the pipeline (1). For example, the outer diameter of the first throttling capillary (5) is 1 mm, the inner diameter of the small inner diameter elastic tube (4) is 0.8 mm, the outer diameter of the small inner diameter elastic tube (4) is 3 mm, the inner diameter of the large inner diameter elastic tube (3) is 2 mm, the outer diameter of the large inner diameter elastic tube (3) is 4 mm, and the inner diameter of the pipeline (1) is 5 mm.
[0016] In some embodiments, during disassembly, the shut-off component (2) is loosened, the small inner diameter elastic tube (4) and the first throttling capillary tube (5) are removed, the second end of the small inner diameter elastic tube (4) is connected to the second throttling capillary tube (6), the first end of the small inner diameter elastic tube (4) is connected to the second end of the large inner diameter elastic tube (3), and the interface is then tightened and sealed with the shut-off component (2) to achieve the replacement and sealing of the test capillary tube.
[0017] In some embodiments, the shut-off component (2) includes an O-ring and an elastic clamp.
[0018] In some embodiments, the pipeline (1) is used to transport propellant.
[0019] Based on the above disassembly and assembly structure, compared with the traditional hard connection method, the capillary throttling tube structure can be quickly disassembled and assembled, saving operation time and reducing the time cost in the experimental preparation and debugging process. It avoids the problem that the traditional welded throttling capillary tube is prone to cracking at the weld joint of the throttling tube due to the rotational torque when the movable connecting parts at both ends are tightened during installation and replacement, which can lead to propellant leakage and failure.
[0020] The specific embodiments of this application have been described above. It should be understood that this application is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this application. Unless otherwise specified, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other.
Claims
1. A quick-assembly and disassembly structure for a throttling capillary tube, characterized in that, include: Pipeline (1), shut-off component (2), large inner diameter elastic tube (3), small inner diameter elastic tube (4) and first throttling capillary tube (5); The pipeline (1) is connected to the first end of the large inner diameter elastic tube (3), and the shut-off component (2) tightens and seals the interface; the second end of the large inner diameter elastic tube (3) is connected to the first end of the small inner diameter elastic tube (4), the second end of the small inner diameter elastic tube (4) is connected to the first throttling capillary tube (5), and the shut-off component (2) tightens and seals the interface.
2. The disassembly and assembly structure according to claim 1, characterized in that, The outer diameter of the first throttling capillary (5) is greater than the inner diameter of the small inner diameter elastic tube (4), the outer diameter of the small inner diameter elastic tube (4) is greater than the inner diameter of the large inner diameter elastic tube (3), and the outer diameter of the large inner diameter elastic tube (3) is smaller than the inner diameter of the pipeline (1).
3. The disassembly and assembly structure according to claim 1, characterized in that, The shut-off component (2) includes an O-ring and an elastic clamp.
4. The disassembly and assembly structure according to claim 1, characterized in that, During disassembly, loosen the stop component (2), remove the small inner diameter elastic tube (4) and the first throttling capillary tube (5), connect the second end of the small inner diameter elastic tube (4) to the second throttling capillary tube (6), connect the first end of the small inner diameter elastic tube (4) to the second end of the large inner diameter elastic tube (3), and then use the stop component (2) to tighten and seal the interface to achieve the replacement and sealing of the test capillary tube.
5. The disassembly and assembly structure according to claim 1, characterized in that, The pipeline (1) is used to transport propellant.