Ultra-high-pressure electric explosion valve and its precise assembly and adjustment method

Abstract

The present invention provides an ultra-high voltage electric explosion valve and a precision assembly and adjustment method thereof, comprising: screwing in the inlet and outlet adjustment screw caps and the inlet and outlet plastic filling rods in sequence at the inlet and outlet positions of the ultra-high voltage electric explosion valve housing; rotating the inlet and outlet adjustment screw caps so that the heads of the inlet and outlet plastic filling rods just fill the intersecting holes of the ultra-high voltage electric explosion valve housing, and the inlet and outlet plastic filling rods fit with the inner wall of the ultra-high voltage electric explosion valve housing; fixing the inlet and outlet plastic filling rods with a fixing device; loading the cutter assembly into the ultra-high voltage electric explosion valve housing parts; removing the fixing device, the inlet and outlet adjustment screw caps and the filling plastic rods, and using an assembly tool to adjust the cutter assembly to a suitable position. The present invention is simple and easy to operate, ensuring that when the cutter passes through the intersecting holes during the assembly process, the rubber ring and the retaining ring remain in a compressed state to avoid being cut by the intersecting holes, thereby greatly improving the one-time assembly qualification rate, improving the product assembly quality, eliminating potential safety risks, and achieving cost reduction and efficiency improvement in product development.

Description

Technical Field

[0001] The present invention relates to a general fluid working system for aerospace pressurization and transportation, and in particular, to an ultra-high pressure electric explosion valve and a precision adjustment method thereof, and more particularly, to the design and selection of tools, equipment, tooling and methods used in the precision adjustment method. Background Art

[0002] In the aerospace field, the booster delivery system is one of the most important subsystems of the launch vehicle, and the aerospace valve is a key unit in the booster delivery system of the launch vehicle. The ultra-high pressure electric explosion valve is located in the booster gas circuit of the booster delivery system, installed after the gas cylinder, and is the first line of defense for the entire system. Its working principle is: before the electric explosion tube is detonated, the electric explosion valve mainly blocks the gas flow of the gas cylinder. After receiving the work instruction, the high-pressure gas generated by the explosion of the electric explosion tube is used to push the cutter to complete the control of the gas circuit conduction. The reliability and sealing of the valve after conduction are crucial.

[0003] The ultra-high pressure electric explosion valve is subjected to ultra-high pressure of 35MPa and low temperature of -50℃, which requires a high O-ring. The O-ring used is phenyl silicone rubber 6107A, which can be used in a working environment of -60℃~+70℃ and can maintain its physical properties. However, the phenyl silicone rubber ring is soft and can be easily cut when compressed during the assembly process.

[0004] During the assembly process of the ultra-high voltage electric explosion valve, the O-shaped rubber ring and the retaining ring are first installed on the cutter to form a cutter assembly. When the cutter assembly passes through the intersecting hole of the shell, it will experience a change from compression to freedom and then to compression. In addition, the phenyl silicone rubber ring is soft and can be easily cut by the intersecting hole of the shell. After being installed in the shell, it is difficult to judge the state of the O-ring and retaining ring on the cutter after installation. It can only be found in the subsequent performance test. Since the test pressure of the ultra-high voltage electric explosion valve is 35MPa, if the O-ring or retaining ring is in a damaged state, on the one hand, during the test, the O-ring or retaining ring may fail, causing high-pressure gas leakage, causing other parts to be ejected, thereby endangering the life of the operator; on the other hand, if the fault is found during the test stage and repeatedly repaired, it is necessary to replace a new rubber ring or retaining ring and other vulnerable parts in the product, and the phenyl silicone ring is expensive, and then re-assembly experiment. This will not only consume a lot of manpower and financial resources, but also affect the development efficiency of the product and the delivery progress. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide an ultra-high voltage electric explosion valve and a precise assembly and adjustment method thereof.

[0006] A method for precise adjustment of an ultra-high voltage electric explosion valve provided by the present invention comprises:

[0007] Step S1: Screw in the inlet and outlet adjusting screw caps at the inlet and outlet positions of the ultra-high voltage electric explosion valve housing, and then install the inlet and outlet plastic filling rods;

[0008] Step S2: Rotate the inlet and outlet adjusting screw caps so that the heads of the inlet and outlet plastic filling rods just fill the intersecting holes of the ultra-high voltage electric explosion valve housing, and the inlet and outlet plastic filling rods fit with the inner wall of the ultra-high voltage electric explosion valve housing;

[0009] Step S3: Fixing the inlet and outlet plastic filling rods by using a fixing device;

[0010] Step S4: installing the cutter assembly into the housing part of the ultra-high voltage electric explosion valve;

[0011] Step S5: Remove the fixing device, the inlet and outlet adjusting screw covers and the filling plastic rod, and use the assembly tool to adjust the cutter assembly until the inlet of the ultra-high voltage electric explosion valve housing coincides with the axis of the blind hole on the cutter assembly.

[0012] Preferably, the head of the inlet and outlet plastic filling rod is a concave surface, and the concave surface of the head of the inlet and outlet plastic filling rod just fills the inlet and outlet intersecting holes of the ultra-high voltage electric explosion valve housing.

[0013] Preferably, the tail of the inlet and outlet plastic filling rod is flat, and the flattening direction is perpendicular to the axis of the head curved surface.

[0014] Preferably, the inlet and outlet plastic filling rods are made of polytetrafluoroethylene plastic.

[0015] Preferably, the step S3 comprises: fixing the inlet and outlet plastic filling rods with a limiting plate, and then clamping the limiting plate with a precision bench vise.

[0016] Preferably, the limiting plate is provided with a limiting groove, which prevents the inlet and outlet plastic filling rods from rotating and assists the inlet and outlet plastic filling rods to align with the intersecting holes of the shell.

[0017] Preferably, the cutter assembly comprises: a retaining ring and an O-shaped rubber ring;

[0018] Wipe the O-ring and retaining ring clean, apply a thin layer of sealing grease on the O-ring, cut the retaining ring at a certain angle using a cutting tool, install the retaining ring and O-ring in order, and turn it around with a pick after installation to ensure that the O-ring is in a natural state.

[0019] Preferably, the end face of the cutter assembly comprises a threaded hole, and the cutter assembly is rotated and installed using an assembly tool.

[0020] Preferably, an endoscope is used to assist in the inspection to ensure that the heads of the inlet and outlet plastic filling rods just fill the intersecting holes of the ultra-high voltage electric explosion valve housing, and that the inlet and outlet plastic filling rods fit with the inner wall of the ultra-high voltage electric explosion valve housing.

[0021] An ultra-high voltage electric explosion valve provided by the present invention is prepared based on the above-mentioned ultra-high voltage electric explosion valve precision assembly and adjustment method.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention is simple and easy to operate, and can ensure that when the cutter passes through the intersecting hole during the assembly process, the rubber ring and the retaining ring are always kept in a compressed state to avoid being cut by the intersecting hole, thereby ensuring that the assembly is qualified at one time, greatly improving the product qualification rate, improving the product assembly quality, and eliminating potential safety risks, thereby achieving "cost reduction and efficiency improvement" in product development;

[0024] 2. The invention uses imported plastic filling rods to completely fill the intersecting holes at the shell, so that the inner wall of the shell is complete, and there will be no cutter assembly. During the assembly process, the inner wall of the shell and the cutter squeeze the rubber ring and the retaining ring first, and then when passing through the intersecting hole, the shell is no longer squeezed, and the O-shaped rubber ring returns to a free state. Finally, when assembling inward, the inner wall of the shell will squeeze the rubber ring and the retaining ring again;

[0025] 3. The present invention mainly fills the intersecting holes of the shell completely, which is equivalent to the state that the shell has no intersecting holes, minimizes the state changes of the rubber ring and the retaining ring during assembly, thereby avoiding the risk of being cut. The plastic rod is assisted by an adjusting screw cap instead of being made into an integral part, mainly controlling the concave surface of the head of the plastic rod in a certain direction. If it is made into an integral part, it cannot be guaranteed that the head of the plastic rod is just filled. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 A flow chart of the method of using the present invention;

[0028] Figure 2 This is a schematic diagram of the installation and adjustment of the ultra-high voltage electric explosion valve;

[0029] Figure 3 Schematic diagram of the rubber ring status inside the valve.

[0030] Among them, 1-shell; 2-cutter assembly; 3-limiting plate; 4-inlet adjusting screw cover; 5-inlet plastic filling rod; 6-assembly tooling; 7-outlet adjusting screw cover; 8-outlet plastic filling rod; 9-O-shaped rubber ring; 10-retaining ring. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0032] Example 1

[0033] According to the invention, a method for precise adjustment of an ultra-high voltage electric explosion valve is provided. Figures 1 to 3 As shown, including:

[0034] Preparation steps: clean the O-shaped rubber ring 9 and the retaining ring 10, apply a thin layer of sealing grease on the O-shaped rubber ring 9, cut the retaining ring 10 at a certain angle using a cutting tool, and install the O-shaped rubber ring 9 and the retaining ring 10 in sequence according to the direction of gas pressure and the distance from the gas. After installation, use a pick needle to rotate it once to ensure that the O-shaped rubber ring 9 is in a natural state, and then screw the inlet and outlet adjusting screw covers and the inlet and outlet plastic filling rods into the inlet and outlet positions of the housing 1 in sequence, including: the inlet adjusting screw cover 4 and the outlet adjusting screw cover 7 as well as the inlet plastic filling rod 5 and the outlet plastic filling rod 8;

[0035] Rough adjustment steps: rotate the inlet and outlet adjusting screw caps respectively until the inlet and outlet plastic filling rods are roughly located at the inlet and outlet intersecting holes;

[0036] Fine-tuning steps: Use the limit plate 3 to fix the inlet and outlet plastic filling rods, and make the upper groove of the limit plate 3 clamp the flat part on the plastic rod, fix the plastic filling rod to prevent it from rotating, so that the missing part of the curved surface of the head of the plastic filling rod and the intersecting hole can be completely filled, and then use a precision bench vise to clamp the limit plate 3. At this time, slightly adjust the adjustment screw cover so that the plastic filling rod only moves in translation, and use an endoscope to assist observation until it is adjusted to fully fit the inner wall of the shell;

[0037] Assembly steps: The assembly process needs to take into account the position and direction of the cutter assembly to achieve simultaneous rotation, loading and withdrawal. Therefore, two threaded holes on the end face of the cutter are used to adopt a two-screw assembly tool to rotate and load the cutter assembly 2;

[0038] Adjustment steps: unscrew the precision bench vise, then remove the limit plate 3, the adjustment screw cover and the filling plastic rod, and use the assembly tool 6 to adjust the cutter assembly 2 to the appropriate position.

[0039] An ultra-high voltage electric explosion valve provided by the present invention is prepared based on the above-mentioned ultra-high voltage electric explosion valve precision assembly and adjustment method.

[0040] Example 2

[0041] Embodiment 2 is a preferred example of embodiment 1. According to the present invention, a method for precise adjustment of an ultra-high voltage electric explosion valve comprises:

[0042] Preparation steps: screw in the inlet and outlet adjustment screw covers and the inlet and outlet plastic filling rods in sequence at the inlet and outlet positions of the housing, install the retaining ring and O-shaped rubber ring on the cutter to form a cutter assembly, and confirm the installation status;

[0043] Coarse adjustment steps: Rotate the inlet and outlet adjustment screw covers to make the inlet and outlet plastic filling rods be at the intersecting holes of the shell;

[0044] Fine-tuning steps: The inlet and outlet plastic filling rods are fixed with a limit plate. The groove on the limit plate clamp prevents the plastic filling rod from rotating, and helps the head curved surface of the fluoroplastic filling rod to align with the intersecting hole. Then use a precision bench vise to clamp the limit plate. At this time, fine-tune the screw cover and use an endoscope to assist in inspection, so that the inlet and outlet plastic filling rods are translated and extended until the head curved surface is completely in line with the inner wall of the shell;

[0045] Assembly steps: With the help of the two threaded holes on the end face of the cutter assembly, use the assembly tool to rotate and install the cutter assembly.

[0046] Adjustment steps: remove the limit plate, inlet and outlet adjustment screw covers and filling plastic rods, and use the assembly tool to adjust the cutter assembly until the inlet of the ultra-high voltage electric explosion valve housing roughly coincides with the axis of the blind hole on the cutter assembly.

[0047] In this embodiment, the inlet and outlet plastic filling rods are polytetrafluoroethylene (F4) plastic filling rods, and the head thereof is an arc surface, more specifically, a concave surface, which just fills the inlet and outlet intersecting holes of the shell, thereby preventing the O-ring and retaining ring thereon from changing from compressed to free and then to compressed when passing through the intersecting holes of the shell during the process of inserting the cutter, thereby reducing the risk of the O-ring and retaining ring being cut by the shell; the edge has a smooth transition, which can completely fill the inner cavity of the shell and play the role of building a "bridge", and the tail thereof is flat, which is convenient for judging the direction during installation, and at the same time allows the head to just fill the intersecting holes of the shell, and the material selected is polytetrafluoroethylene fluoroplastic, which has a low friction coefficient, thereby preventing the O-ring and retaining ring from being cut.

[0048] In this embodiment, considering the differences in sizes between different shells, in order to improve the versatility and stability of the method, an adjusting screw cap is used to adjust the different shells, which is more adaptable, and an endoscope can be used for auxiliary observation during adjustment;

[0049] In this embodiment, a limit plate is used to clamp the entire valve on a precision flat-nose pliers to ensure overall stability and accuracy during installation and adjustment.

[0050] In this embodiment, the assembly tool used can realize the rotational installation of the cutter assembly by means of two threaded holes on the end face of the cutter assembly, and can realize the rotational withdrawal when over-installed, and adjust to the correct position.

[0051] In this embodiment, a limiting groove is formed on the limiting plate, and the tail of the plastic filling rod is flat, and the flattening direction is perpendicular to the axis of the head curved surface.

[0052] An ultra-high voltage electric explosion valve provided by the present invention is prepared based on the above-mentioned ultra-high voltage electric explosion valve precision assembly and adjustment method.

[0053] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A method for precise adjustment of ultra-high voltage electric explosion valve, characterized in that: include: Preparation steps: clean the O-shaped rubber ring and the retaining ring, apply a thin layer of sealing grease on the O-shaped rubber ring, cut the retaining ring at a certain angle using a cutting tool, and install the O-shaped rubber ring and the retaining ring in sequence according to the direction of gas pressure and the distance from the gas. After installation, use a pick to turn it once to ensure that the O-shaped rubber ring is in a natural state, and then screw in the inlet and outlet adjustment screw covers and the inlet and outlet plastic filling rods in sequence at the inlet and outlet positions of the housing, including: the inlet adjustment screw cover and the outlet adjustment screw cover as well as the inlet plastic filling rod and the outlet plastic filling rod; Rough adjustment steps: rotate the inlet and outlet adjusting screw caps respectively until the inlet and outlet plastic filling rods are roughly located at the inlet and outlet intersecting holes; Fine-tuning steps: Use the limit plate to fix the inlet and outlet plastic filling rods, and make the upper groove of the limit plate clamp the flat part on the plastic rod, fix the plastic filling rod to prevent it from rotating, so that the missing part of the curved surface of the head of the plastic filling rod and the intersecting hole can be completely filled, and then use a precision bench vise to clamp the limit plate. At this time, slightly adjust the adjusting screw cover so that the plastic filling rod only moves in translation, and use an endoscope to assist observation until it is adjusted to fully fit the inner wall of the shell; Assembly steps: The assembly process needs to take into account the position and direction of the cutter assembly to achieve simultaneous rotation, loading and unloading. Use two threaded holes on the end face of the cutter and use a two-screw assembly tool to rotate and load the cutter assembly. Adjustment steps: Unscrew the precision bench vise, then remove the limit plate, adjustment screw cap and filling plastic rod, and use the assembly tool to adjust the cutter assembly to the appropriate position.

2. The method for precise adjustment of ultra-high voltage electric explosion valve according to claim 1 is characterized in that: The head of the inlet and outlet plastic filling rod is a concave surface, and the concave surface of the head of the inlet and outlet plastic filling rod just fills the inlet and outlet intersecting holes of the ultra-high voltage electric explosion valve housing.

3. The method for precise adjustment of ultra-high voltage electric explosion valve according to claim 1 is characterized in that: The tail of the inlet and outlet plastic filling rod is flat, and the flattening direction is perpendicular to the axis of the head curved surface.

4. The method for precise adjustment of ultra-high voltage electric explosion valve according to claim 1 is characterized in that: The inlet and outlet plastic filling rods are made of polytetrafluoroethylene plastic.

5. The method for precise adjustment of ultra-high voltage electric explosion valve according to claim 1 is characterized in that: The limiting plate is provided with a limiting groove, which prevents the inlet and outlet plastic filling rods from rotating and assists the inlet and outlet plastic filling rods to align with the intersecting holes of the shell.

6. An ultra-high voltage electric explosion valve, characterized in that: It is prepared based on the ultra-high voltage electric explosion valve precision assembly and adjustment method described in any one of claims 1 to 5.

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