Ultrahigh pressure explosion valve and precise mounting and adjusting method thereofTechnical Field
The invention relates to a general fluid working system for space flight pressurization conveying, in particular to an ultrahigh pressure explosion valve and a precise adjustment method thereof, and more particularly relates to a tool, equipment, a tool and a method for the precise adjustment method, and design and selection of the method.
Background
In the field of spaceflight, a pressurizing and conveying system is one of the most important subsystems of a carrier rocket, and a spaceflight valve is a key single machine in the pressurizing and conveying system of the carrier rocket. The ultra-high pressure explosion valve is arranged on a pressurizing gas path of a pressurizing conveying system and is a first defense line of the whole system after being arranged on a gas cylinder, and the working principle of the ultra-high pressure explosion valve is that the explosion valve mainly blocks gas circulation of the gas cylinder before explosion of the explosion tube, and the high pressure gas generated by explosion of the explosion tube is utilized to push a cutter to complete control the conduction of the gas path after receiving a working instruction, so that the reliability and the sealing performance of the valve after the conduction are very important.
The ultrahigh pressure explosion valve is subjected to the working conditions of 35MPa ultrahigh pressure and-50 ℃ low temperature, the requirement on the use of an O-shaped rubber ring is high, the O-shaped rubber ring is phenyl silicone rubber 6107A, the ultrahigh pressure explosion valve can be suitable for working environments of-60 ℃ to +70 ℃, and the physical properties of the ultrahigh pressure explosion valve can be maintained. However, the phenyl silicone rubber ring is soft and is easily cut when compressed during assembly.
In the assembling process of the ultrahigh pressure explosion valve, the cutter is firstly provided with the O-shaped rubber ring and the check ring to form a cutter assembly, the cutter assembly is changed from compression to free compression to compression when passing through the through hole of the shell, and the phenyl silicone rubber ring is soft in material, is extremely easy to be penetrated by the shell to Kong Qieshang, and after the cutter is provided with the shell, the state of the cutter after the O-shaped rubber ring and the check ring are provided with the cutter is difficult to judge, and the cutter assembly can be discovered only in the subsequent performance test. Because the test pressure of the ultra-high pressure explosion valve is 35MPa, if the O-ring or the check ring is in a damaged state, on one hand, the O-ring or the check ring is possibly invalid in the test process, so that high-pressure gas is leaked, other parts are ejected, and the life danger is caused to operators, on the other hand, faults are found in the test stage, the repeated repair is carried out, new ring or check ring and other vulnerable parts in the product are needed to be replaced, the cost of the phenyl silicone ring is high, and then the reassembling test is carried out. This not only consumes a lot of manpower and financial resources, but also can influence the development efficiency of product, influences the delivery schedule.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an ultrahigh pressure explosion valve and a precise assembling and adjusting method thereof.
The invention provides a precise adjustment method of an ultrahigh pressure explosion valve, which comprises the following steps:
step S1, screwing an inlet and outlet adjusting screw cover into an inlet and outlet position of an ultra-high voltage explosion valve shell, and then filling an inlet and outlet plastic filling rod;
S2, rotating an inlet and outlet adjusting screw cap to enable the head of an inlet and outlet plastic filling rod to just fill a through hole of the ultra-high voltage explosion valve shell, wherein the inlet and outlet plastic filling rod is matched with the inner wall of the ultra-high voltage explosion valve shell;
s3, fixing the inlet and outlet plastic filling rods by using a fixing device;
S4, loading the cutter assembly into the ultrahigh pressure explosion valve shell part;
And S5, taking down the fixing device, the inlet and outlet adjusting screw cover and the filling plastic rod, and adjusting the cutter assembly by using the assembly tool until the inlet of the ultra-high voltage explosion valve shell coincides with the axis of the blind hole on the cutter assembly.
Preferably, the head of the inlet and outlet plastic filling rod is a concave curved surface, and the inlet and outlet intersecting holes of the ultra-high voltage explosion valve shell are just filled based on the concave curved surface of the head of the inlet and outlet plastic filling rod.
Preferably, the tail of the inlet and outlet plastic filling rod is flat, and the flat direction is perpendicular to the curved axis of the head.
Preferably, the inlet and outlet plastic filling rod is polytetrafluoroethylene plastic.
Preferably, the step S3 comprises the steps of fixing the inlet and outlet plastic filling bars by using a limiting plate and clamping the limiting plate by using a precision bench vice.
Preferably, the limiting plate is provided with a limiting groove, the limiting groove prevents the inlet and outlet plastic filling rod from rotating and assists the inlet and outlet plastic filling rod to align with the through hole of the shell.
Preferably, the cutter assembly comprises a retainer ring and an O-shaped rubber ring;
And wiping the O-shaped rubber ring and the check ring, coating a thin layer of sealing grease on the O-shaped rubber ring, cutting the check ring along a certain angle by using a cutting tool, respectively loading the check ring and the O-shaped rubber ring in sequence, and rotating the check ring by a picking needle for one circle after the check ring and the O-shaped rubber ring are assembled, so that the O-shaped rubber ring is ensured to be in a natural state.
Preferably, the cutter assembly end face comprises a threaded hole, and the cutter assembly is rotationally mounted by using an assembly tool.
Preferably, the endoscope is used for assisting in inspection, so that the head of the inlet and outlet plastic filling rod is ensured to just fill the through hole of the ultra-high voltage explosion valve shell, and the inlet and outlet plastic filling rod is matched with the inner wall of the ultra-high voltage explosion valve shell.
The ultra-high pressure explosion valve is prepared based on the precise mounting and adjusting method of the ultra-high pressure explosion valve.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention is simple and easy to operate, can ensure that the rubber ring and the retainer ring are always kept in a compressed state when the cutter passes through the intersecting hole in the assembly process, and avoid being cut by the intersecting hole, thereby ensuring that the cutter is assembled at one time, greatly improving the product qualification rate, improving the product assembly quality, eliminating the potential safety risk and realizing the cost reduction and efficiency enhancement of product development;
2. according to the invention, the through holes at the shell are completely filled by the inlet plastic filling rod, so that the inner wall of the shell is complete, the cutter assembly does not exist, during the assembly process, the inner wall of the shell and the cutter extrude the rubber ring and the retainer ring, then the shell is not extruded when passing through the through holes, the O-shaped rubber ring returns to a free state, and finally, the inner wall of the shell extrudes the rubber ring and the retainer ring when being assembled;
3. The invention mainly fills the through holes of the shell completely, which is equivalent to no through Kong Zhuangtai of the shell, and reduces the state change of the rubber ring and the retainer ring in the assembly process to the greatest extent, thereby avoiding the risk of being cut, and the adjusting screw cover is used for assisting the plastic rod without being integrated, and mainly controls the concave curved surface of the head of the plastic rod to be in a certain direction, if being integrated, the head of the plastic rod cannot be ensured to be just filled.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a flow chart of a usage mode of the present invention;
FIG. 2 is a schematic diagram of the ultra-high pressure explosion valve assembly;
FIG. 3 is a schematic view of the state of the rubber ring in the valve.
Wherein, 1-shell; 2-cutter components, 3-limiting plates, 4-inlet adjusting screw covers, 5-inlet plastic filling rods, 6-assembly tools, 7-outlet adjusting screw covers, 8-outlet plastic filling rods, 9-O-shaped rubber rings and 10-check rings.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Example 1
The invention provides a precise adjustment method of an ultra-high pressure explosion valve, which is shown in figures 1 to 3, and comprises the following steps:
The preparation method comprises the steps of wiping the O-shaped rubber ring 9 and the retainer ring 10, coating a thin layer of sealing grease on the O-shaped rubber ring 9, cutting the retainer ring 10 along a certain angle by using a cutting tool, sequentially filling the O-shaped rubber ring 9 and the retainer ring 10 according to the direction of air pressure and the near distance of the gas, rotating a circle by a picking needle after the O-shaped rubber ring 9 is filled, ensuring that the O-shaped rubber ring 9 is in a natural state, and sequentially screwing an inlet and outlet adjusting screw cap and an inlet and outlet plastic filling rod at the inlet and outlet positions of the shell 1, wherein the O-shaped rubber ring comprises an inlet adjusting screw cap 4, an outlet adjusting screw cap 7, an inlet plastic filling rod 5 and an outlet plastic filling rod 8;
A rough adjustment step, namely respectively rotating an inlet adjusting screw cover and an outlet adjusting screw cover until the inlet and outlet plastic filling bars are approximately positioned at the inlet and outlet through holes;
The plastic filling rod at the inlet and the outlet is fixed by using a limiting plate 3, a groove on the limiting plate 3 is used for clamping a flat type on the plastic rod, the plastic filling rod is fixed to prevent the plastic filling rod from rotating, the curved surface of the head of the plastic filling rod and the position of the intersecting hole are missing to be completely filled, then the limiting plate 3 is clamped by using a precise bench vice, at the moment, an adjusting screw cap is slightly adjusted, so that the plastic filling rod only moves in a translation mode, and meanwhile, the plastic filling rod is observed in an auxiliary mode by adopting an endoscope until the plastic filling rod is adjusted to be completely matched with the inner wall of the shell;
The assembly process needs to consider the position direction of the cutter assembly, so that the cutter assembly 2 can be rotated, installed and withdrawn simultaneously, and therefore, two screw type assembly tools are adopted to rotationally install the cutter assembly by using two threaded holes on the end face of the cutter;
and the adjustment step comprises unscrewing the precision bench vice, then taking down the limiting plate 3, adjusting the screw cap and filling the plastic rod, and adjusting the cutter assembly 2 to a proper position by adopting the assembly tool 6.
The ultra-high pressure explosion valve is prepared based on the precise mounting and adjusting method of the ultra-high pressure explosion valve.
Example 2
Embodiment 2 is a preferred embodiment of embodiment 1, and the precise adjustment method for the ultra-high pressure explosion valve provided by the invention comprises the following steps:
The preparation method comprises the steps of screwing an inlet and outlet adjusting screw cover and an inlet and outlet plastic filling rod in sequence at the inlet and outlet positions of the shell, respectively arranging a retainer ring and an O-shaped rubber ring on a cutter to form a cutter assembly, and confirming the installation state;
A coarse adjustment step, namely rotating the inlet and outlet adjusting screw cap to enable the inlet and outlet plastic filling rod to be positioned at the through hole of the shell;
The plastic filling rod at the inlet and the outlet is fixed by a limiting plate, a groove on a clamping plate of the limiting plate prevents the plastic filling rod from rotating, the curved surface of the head of the fluoroplastic filling rod is assisted to be just aligned with the through hole, then the limiting plate is clamped by a precision bench vice, at the moment, a screw cover is adjusted in a fine adjustment mode, and an endoscope is used for assisting in checking, so that the plastic filling rod at the inlet and the outlet is horizontally moved and stretched until the curved surface of the head is completely matched with the inner wall of the shell;
and assembling, namely rotationally loading the cutter assembly by using an assembling tool by means of two threaded holes on the end face of the cutter assembly.
And the adjusting step is to take down the limiting plate, the inlet and outlet adjusting screw cover and the filling plastic rod, and adjust the cutter assembly by using the assembling tool until the inlet of the ultra-high voltage explosion valve shell is approximately coincident with the axis of the blind hole on the cutter assembly.
In the embodiment, the inlet and outlet plastic filling rod is a polytetrafluoroethylene (F4) plastic filling rod, the head of the inlet and outlet plastic filling rod is a cambered surface, more specifically, a concave cambered surface, and the inlet and outlet plastic filling rod just fills the inlet and outlet intersecting holes of the shell, so that the situation that the O-shaped rubber ring and the retainer ring are compressed after being compressed at the positions of the inlet and outlet intersecting holes of the shell is changed from compression to free compression in the process of filling the inlet and outlet intersecting holes of the shell in the process of cutting the shell is avoided, the risk that the O-shaped rubber ring and the retainer ring are cut by the shell is reduced, the edge is smoothly transited, the inner cavity of the shell can be completely filled, the function of building a bridge is achieved, the tail of the bridge is flat, the direction is judged when the bridge is convenient to install, and meanwhile, the head just fills the positions of the inlet and outlet intersecting holes of the shell are made of polytetrafluoroethylene plastic, and the friction coefficient is low, and the O-shaped rubber ring and the retainer ring are prevented from being cut.
In the embodiment, considering the difference of the sizes of different shells, in order to improve the universality and the stability of the method, the adjusting screw cover is utilized to adjust the shells, so that the method is more adaptive, and the endoscope can be used for auxiliary observation during adjustment;
In this embodiment, use limiting plate to wholly hold the valve on accurate flat tongs, guarantee to install holistic stability and accurate when adjusting.
In the embodiment, the assembly tool used can realize the rotary loading of the cutter assembly by means of two threaded holes on the end face of the cutter assembly, and realize the rotary withdrawal when the cutter assembly is excessively loaded, and is adjusted at the correct position.
In the embodiment, the limiting plate is provided with the limiting groove, the tail part of the plastic filling rod is flat, and the flat direction is perpendicular to the curved axis of the head part.
The ultra-high pressure explosion valve is prepared based on the precise mounting and adjusting method of the ultra-high pressure explosion valve.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.