CN115711299A - Bellows sealed type electric explosion valve - Google Patents
Bellows sealed type electric explosion valve Download PDFInfo
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- CN115711299A CN115711299A CN202211488210.0A CN202211488210A CN115711299A CN 115711299 A CN115711299 A CN 115711299A CN 202211488210 A CN202211488210 A CN 202211488210A CN 115711299 A CN115711299 A CN 115711299A
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Abstract
The invention discloses a bellows sealed type electric explosion valve which comprises a shell with an inner cavity, an electric explosion tube, a plug screw with a through hole, a piston, a bellows, two filler necks and a pushing piece. One end of the screw plug is provided with an electric explosion tube, and the other end of the screw plug extends into the inner cavity. The piston is connected in the through hole in a sliding mode, and one end of the piston extends out of the through hole and is pushed after the fuel gas is electrically exploded by the electric explosion tube. The corrugated pipe is arranged in the inner cavity and sleeved outside the screw plug and the piston, one end of the corrugated pipe is hermetically connected with the screw plug, and the other end of the corrugated pipe is hermetically connected with the piston extending out of the through hole. The two filler neck mouths extend into the inner cavity respectively, and the external passage in the filler neck mouths is connected with a closed structure in the inner cavity. The pushing piece is arranged in the inner cavity, one end of the pushing piece is abutted against one end of the piston extending out of the through hole, the other end of the pushing piece is provided with a cutter corresponding to the two filler necks respectively, and the pushing piece is also provided with a connecting channel; the pushing piece is pushed by the piston and drives the two cutters to cut off the two closed structures respectively, and then the two ends of the connecting channel are in butt joint communication with the external channels of the two filler neck nozzles respectively.
Description
Technical Field
The invention belongs to the technical field of electric explosion valves, and particularly relates to a corrugated pipe sealed electric explosion valve which can be used for long-term on-orbit stop in a pressurized conveying system, and is particularly widely applied to a liquid carrier rocket power system or a spacecraft propulsion system.
Background
The electric explosion valve has the characteristics of high sealing property, good stability and the like before detonation, is widely applied to a pressurized conveying system of a carrier rocket, and mainly has the functions of isolating high-pressure gas stored in a gas cylinder from components such as a downstream electromagnetic valve, a pressure reducing valve and the like before the system works and exploding a downstream pipeline to pressurize a propellant storage tank during the work. Most of electric explosion valve sealing structures used in existing pressurization conveying systems adopt a metal gasket or a combination of a plurality of nonmetal O rubber ring check rings to seal the side of an electric explosion pipe after detonation, and are combined with the influence of the service environment of electric explosion valve products on metal or nonmetal materials, particularly the influence of detonation impact, space high and low temperature, vacuum and vibration thread loss, and the nonmetal or metal sealing structures are difficult to meet the requirement of sealing indexes after detonation.
Disclosure of Invention
The invention aims to provide a bellows sealed type electric explosion valve, which solves the problem that the sealing performance of the electric explosion valve after detonation is difficult to meet the requirement in the prior art.
The technical scheme of the invention is as follows:
a bellows-sealed type electric burst valve comprising:
a housing having an interior cavity;
the electric explosion tube is provided with an axially arranged through hole, the electric explosion tube extends into the through hole at the first end of the screw plug and is circumferentially and hermetically connected with the through hole, the second end of the screw plug extends into the inner cavity, and the through hole is communicated with the inner cavity;
the piston is connected in the through hole in a sliding mode, and one end of the piston extends out of the through hole at the second end of the plug screw; the piston is pushed to move after the electric detonator electrically explodes the fuel gas;
the corrugated pipe is arranged in the inner cavity, the corrugated pipe is sleeved outside the plug screw and the piston, one end of the corrugated pipe is circumferentially and hermetically connected with the plug screw, and the other end of the corrugated pipe is circumferentially and hermetically connected with the piston extending out of the through hole;
the two pipe connecting nozzles extend into the inner cavity respectively, and an external channel in the pipe connecting nozzles is connected with a closed structure in the inner cavity;
the pushing piece is arranged in the inner cavity, one end of the pushing piece is abutted to one end, extending out of the through hole, of the piston, the other end of the pushing piece is provided with a cutter corresponding to the two filler neck nozzles respectively, and a connecting channel is further arranged on the pushing piece; and after the pushing piece is pushed by the piston and drives the two cutters to cut off the two closed structures respectively, the two ends of the connecting channel are in butt joint communication with the external channels of the two pipe connecting nozzles respectively.
In an embodiment of the bellows sealed type electric explosion valve, a sealing portion is arranged on the inner cavity, and the sealing portion is used for realizing circumferential sealing with the pushing member after the bellows sealed type electric explosion valve is detonated.
In the bellows sealed type electric explosion valve in one embodiment, the limiting part is an annular conical surface formed by inclining part of the inner wall surface of the inner cavity, and the pushing part is provided with an annular inclined surface matched with the annular conical surface; and after the corrugated pipe sealed electric explosion valve is detonated, the annular conical surface and the annular inclined surface are wedged tightly to form hard seal.
In one embodiment, the angle of the conical surface is 20 degrees.
In one embodiment of the bellows-sealed type electric explosion valve, the side wall of the pushing piece is concave on one side of the annular inclined surface facing the filler neck.
In an embodiment, the bellows is welded to the plug screw and the piston.
In an embodiment of the bellows sealed type electric explosion valve, sealing rings are respectively arranged between the plug screw and the piston and between the pushing member and the housing, and are used for realizing sealed sliding.
In the bellows sealed type electric explosion valve in one embodiment, the piston and the pushing member are respectively provided with a rubber ring groove for accommodating the sealing ring; and the two axial ends of the sealing ring are respectively provided with a retaining ring, and the retaining rings are arranged in the rubber ring groove.
In an embodiment of the bellows-sealed type electric explosion valve, the electric explosion tube is connected with the through hole through threads, and a gasket is arranged between the electric explosion tube and the screw plug to realize sealing.
In an embodiment of the bellows-type squib valve, the plug screw and the inner chamber are connected by a screw thread, and the plug screw and the housing are welded and fixed.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
the bellows sealed type electric explosion valve provided by the invention has the advantages that the bellows forms an isolation flow channel between the electric explosion tube and a medium, is integrally formed, has reliable structural strength and good flexibility, is favorable for stretching and compressing the bellows sealed type electric explosion valve before and after explosion, effectively separates the medium flow channel (mainly a connecting channel on a pushing piece and a channel formed by butting external channels on connecting pipe nozzles at two sides) before and after the explosion of the bellows sealed type electric explosion valve from the side of the electric explosion tube, improves the sealing performance of the side of the electric explosion tube after the explosion, and solves the problem that the sealing performance of the existing electric explosion valve after the explosion is difficult to meet the requirement.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
FIG. 1 is a schematic structural diagram of a bellows sealed type electric explosion valve of the present invention before detonation;
FIG. 2 is a schematic structural diagram of a bellows sealed type electric explosion valve after detonation;
FIG. 3 is an enlarged view of a portion of FIG. 1 at I;
fig. 4 is a partial enlarged view at II in fig. 1.
Description of the reference numerals:
1: electrically exploding the tube; 2: a gasket; 3: screw plug, 4: a sealing structure; 5: a bellows; 6: a piston: 7: a pusher member; 8: a filler neck; 9: a housing.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
Referring to fig. 1 to 4, in the present embodiment, a bellows 5 is provided to form an isolation flow channel between an electric detonator 1 and a medium, so that the sealing performance of the electric detonator 1 side after detonation is improved, and the problem that a non-metal part rubber O-ring cannot meet the sealing index after detonation in a conventional electric detonator can be solved.
The bellows sealed type electric explosion valve comprises a shell 9, an electric explosion tube 1, a screw plug 3, a piston 6, a bellows 5, two filler pipe mouths 8 and a pushing piece 7. The casing 9 is provided with an inner cavity arranged along the axial direction of the casing 9, the inner cavity is provided with an opening at the first axial end, and the second end is closed. The plug screw 3 is provided with a through hole arranged in the axial direction, and the electric detonator 1 extends into the through hole from the first end of the plug screw 3 (the first end and the second end of the plug screw 3 are two ends in the axial direction) and is connected with the through hole in a circumferential sealing manner, specifically, the plug screw and the electric detonator are connected through threads, and the electric detonator is sealed through a gasket 2 arranged as shown in fig. 1 and 2. The second end of the screw plug 3 extends into the inner cavity from the opening of the inner cavity and is in threaded connection with the inner cavity, and the screw plug 3 and the shell 9 are welded and fixedly connected after being in threaded connection.
The piston 6 is slidably connected in the through hole, and one end of the piston 6 extends out of the through hole at the second end of the screw plug 3, and the extending part is positioned in the inner cavity of the shell 9. The piston 6 and the through hole are in clearance fit, and sealing is realized while relative sliding is realized by arranging the sealing structure 4 between the piston and the through hole. Specifically, seal structure 4 includes sealing washer and retaining ring, sets up the rubber ring groove that sets up along 6 circumference of piston on the lateral wall of piston 6, and sealing washer and retaining ring all set up in the rubber ring inslot, and the axial both ends of sealing washer all are provided with the retaining ring, and the sealing washer is pressed from both sides between two retaining rings promptly.
The corrugated pipe 5 can be integrally formed by adopting a metal material and is in an omega shape. The bellows 5 is flexible and can be chosen to have a thickness that depends on the pressure of the application. The bellows 5 is arranged in the inner cavity and sleeved outside the screw plug 3 and the piston 6. One end of the corrugated pipe 5 is circumferentially and hermetically connected with the screw plug 3, and the other end of the corrugated pipe is circumferentially and hermetically connected with a piston 6 extending out of the through hole. Specifically, the inner sides of the two ends of the bellows 5 are welded to the outer side walls of the plug screw 3 and the piston 6, respectively. When the bellows sealed electric explosion valve does not work, the bellows 5 is in a flexible compression state; in operation, the bellows 5 is stretched by the piston 6. The corrugated pipe 5 is fixedly connected with the plug screw 3 and the piston 6 in a welding mode, and the sealing reliability of the sealed electric explosion valve of the corrugated pipe after detonation is improved.
Set up the side opening of intercommunication inner chamber respectively on the relative both sides of casing 9 lateral wall, two filler necks 8 stretch into and rather than threaded connection from two side openings respectively, when filler necks 8 and side opening are screwed up, carry on spacingly by the step that sets up on filler necks 8. One end of an external channel in the filler pipe nozzle 8 in the inner cavity is connected with a closed structure, or one end of an external channel in the inner cavity is provided with a sealing surface.
The pushing piece 7 is arranged in the inner cavity, the first end of the pushing piece 7 is abutted with one end of the piston 6 extending out of the through hole, and the other end of the pushing piece 7 is provided with cutters corresponding to the two filler necks 8 respectively; the pushing piece 7 is also provided with a connecting channel. The pushing piece 7 and the inner cavity are in clearance fit, and sealing is realized while relative sliding is realized by arranging the sealing structure 4 between the pushing piece and the inner cavity. Specifically, the sealing structure 4 here may include a sealing ring and a retainer ring, like the sealing structure 4 provided between the piston 6 and the through hole, a rubber ring groove provided along the circumferential direction of the pushing member 7 is provided on the outer side wall of the pushing member 7, the sealing ring and the retainer ring are both provided in the rubber ring groove, and both axial ends of the sealing ring are provided with the retainer ring, that is, the sealing ring is sandwiched between the two retainer rings. Before the corrugated pipe sealed type electric explosion valve is not detonated, the lower end of the cutter is in contact connection with the outer side wall of the connecting nozzle (the connection position is the lower cutter position of the sealing knot structure cut by the cutter after detonation) to form limiting.
And a sealing part is arranged on the inner cavity and used for realizing circumferential sealing with the pushing piece 7 after the corrugated pipe sealing type electric explosion valve is detonated. Specifically, the limiting portion may be an annular tapered surface formed by inclining a part of the inner wall surface of the inner cavity, and the pushing member 7 is provided with an annular inclined surface matched with the annular tapered surface. After the bellows sealed type electric explosion valve is detonated, the annular conical surface on the inner cavity of the shell 9 and the annular inclined surface on the pushing piece 7 are wedged tightly to form hard seal, and a certain medium isolation effect can be achieved. Preferably, as shown in fig. 4, the angle of the taper is 20 degrees; the side wall of the pushing piece 7 is concave inwards on one side of the annular inclined plane facing the filler pipe mouth 8, the side wall can be concave inwards to form an arc shape, and the concave arrangement is favorable for deformation of the position of the annular conical surface on the pushing piece 7 after the electric detonator 1 is detonated.
When the bellows sealed type electric explosion valve works, the electric explosion tube 1 is electrified to generate high-temperature and high-pressure gas to push the piston 6 to move towards the pushing piece 7 and push the pushing piece 7 to move, two cutters on the pushing piece 7 respectively cut off the closed structures on the two filler pipe mouths 8, so that two ends of a connecting channel on the pushing piece 7 are respectively butted with the external channels of the two filler pipe mouths 8 to form a medium flow channel. Meanwhile, the annular conical surface on the pushing piece 7 and the annular inclined surface on the inner cavity of the shell 9 are wedged tightly to form hard seal, the corrugated pipe 5 is stretched and deformed, and the space in the corrugated pipe 5 is separated from the medium flow passage, so that the sealing performance and the reliability of the side of the electric detonator 1 are ensured.
Fig. 1 is a structural schematic diagram of a bellows sealed type electric explosion valve before detonation, a cutter is connected with the outer side wall of a filler neck 8 before the work of the bellows sealed type electric explosion valve, a sealing structure at one end of an external channel, namely a sealing surface is not cut off, a medium flow channel is closed, and a bellows 5 has a certain compression amount. Fig. 2 is a structural schematic diagram of the sealed type electric explosion valve of the corrugated pipe after detonation, the corrugated pipe 5 is stretched by a certain amount, the sealing structure at one end of the external channel is cut off, the medium flow channel is communicated, and the piston 6 is structurally deformed to wedge the annular conical surface of the inner cavity of the shell 9 to form a hard sealing structure 4.
According to the bellows sealed type electric explosion valve provided by the embodiment, the bellows 5 is made of metal materials, the flexibility of the bellows 5 is good, the extension and compression before and after the detonation of the bellows sealed type electric explosion valve are facilitated, the bellows 5 is integrally formed, the structural strength is reliable, the bellows 5 is fixedly connected with the plug screw 3 and the inner surface of the piston 6 in a welding mode, and a medium flow channel before and after the detonation of the bellows sealed type electric explosion valve is effectively separated from the side of the electric explosion tube 1.
Meanwhile, the pushing piece 7 is provided with a 20-degree annular conical surface, one side of the annular conical surface, which faces the cutter, is inwards concave to form an arc, so that the annular conical surface on the pushing piece 7 and the annular inclined surface on the inner cavity of the shell 9 are wedged tightly after the explosion of the bellows sealed type electric explosion valve, the deformation of the pushing piece 7 is facilitated due to the arc inwards concave arrangement, the wedging force is improved, and the hard sealing reliability between the shell 9 and the pushing piece 7 is improved.
The bellows sealed type electric explosion valve provided by the embodiment can effectively solve the problem of sealing leakage at the side of the electric explosion tube 1 after the conventional electric explosion valve is detonated; meanwhile, the omega-shaped corrugated pipe 5 made of metal is adopted for sealing design, and after the sufficient structural strength design is carried out, the sealing design is not influenced by factors such as temperature environment, impact, vibration and the like, so that the application range of the product can be widely expanded.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, they are still within the scope of the present invention provided that they fall within the scope of the claims of the present invention and their equivalents.
Claims (10)
1. A bellows-sealed type electric burst valve, comprising:
a housing having an interior cavity;
the electric explosion tube is provided with an axially arranged through hole, the electric explosion tube extends into the through hole at the first end of the screw plug and is circumferentially and hermetically connected with the through hole, the second end of the screw plug extends into the inner cavity, and the through hole is communicated with the inner cavity;
the piston is connected in the through hole in a sliding mode, and one end of the piston extends out of the through hole at the second end of the plug screw; the piston is pushed to move after the electric detonator electrically explodes the fuel gas;
the corrugated pipe is arranged in the inner cavity, the corrugated pipe is sleeved outside the plug screw and the piston, one end of the corrugated pipe is circumferentially and hermetically connected with the plug screw, and the other end of the corrugated pipe is circumferentially and hermetically connected with the piston extending out of the through hole;
the two pipe connecting nozzles extend into the inner cavity respectively, and an external channel in the pipe connecting nozzles is connected with a closed structure in the inner cavity;
the pushing piece is arranged in the inner cavity, one end of the pushing piece is abutted to one end, extending out of the through hole, of the piston, the other end of the pushing piece is provided with a cutter corresponding to the two filler necks respectively, and the pushing piece is further provided with a connecting channel; and after the pushing piece is pushed by the piston and drives the two cutters to cut off the two closed structures respectively, the two ends of the connecting channel are in butt joint communication with the external connecting channels of the two filler neck mouths respectively.
2. The bellows-sealed squib valve according to claim 1, wherein a sealing portion is provided on the inner chamber, and the sealing portion is configured to seal circumferentially with the pushing member after the bellows-sealed squib valve is detonated.
3. The bellows sealed type electric explosion valve according to claim 2, wherein the limiting portion is an annular tapered surface formed by inclining a part of an inner wall surface of the inner chamber, and the pushing member is provided with an annular inclined surface matched with the annular tapered surface; after the corrugated pipe sealed type electric explosion valve is detonated, the annular conical surface and the annular inclined surface are wedged tightly to form hard seal.
4. The bellows-sealed type electric explosion valve according to claim 3, wherein the angle of the tapered surface is 20 degrees.
5. A bellows-sealed type electric burst valve according to claim 3, wherein the pusher side wall is recessed on a side of the annular slope toward the filler neck.
6. A bellows-sealed type electric burst valve according to claim 1, wherein the bellows is welded to the plug screw and the piston, respectively.
7. A bellows-sealed type electric burst valve according to claim 1, wherein sealing rings are provided between the plug screw and the piston, and between the urging member and the housing, for effecting sealed sliding.
8. The bellows-sealed squib valve of claim 7, wherein the piston and the pushing member are provided with a gasket groove for receiving the gasket, respectively; and the two axial ends of the sealing ring are respectively provided with a retaining ring, and the retaining rings are arranged in the rubber ring groove.
9. The bellows-type electric squib of claim 1, wherein the electric squib is screw-coupled to the through-hole, and a gasket is provided between the electric squib and the plug screw to achieve sealing.
10. A bellows seal type electric explosion valve according to claim 1, wherein the plug screw and the inner chamber are connected by screw threads, and the plug screw and the housing are fixed by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211488210.0A CN115711299A (en) | 2022-11-25 | 2022-11-25 | Bellows sealed type electric explosion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211488210.0A CN115711299A (en) | 2022-11-25 | 2022-11-25 | Bellows sealed type electric explosion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115711299A true CN115711299A (en) | 2023-02-24 |
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ID=85234732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211488210.0A Pending CN115711299A (en) | 2022-11-25 | 2022-11-25 | Bellows sealed type electric explosion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115711299A (en) |
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2022
- 2022-11-25 CN CN202211488210.0A patent/CN115711299A/en active Pending
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