CN215410389U

CN215410389U - Isolation valve

Info

Publication number: CN215410389U
Application number: CN202120920866.XU
Authority: CN
Inventors: 不公告发明人
Original assignee: Sichuan Xinghe Power Space Technology Co ltd; Beijing Xinghe Power Equipment Technology Co Ltd; Galactic Energy Beijing Space Technology Co Ltd
Current assignee: Sichuan Xinghe Power Space Technology Co ltd; Beijing Xinghe Power Equipment Technology Co Ltd; Galactic Energy Beijing Space Technology Co Ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-01-04
Anticipated expiration: 2031-04-29

Abstract

The utility model relates to the technical field of valve structures, in particular to an isolation valve which comprises a valve body and a piston assembly, wherein the valve body is provided with a first vent hole and a second vent hole, the piston assembly is arranged in the first vent hole, the piston assembly comprises a spring part and a valve core, one end of the spring part is connected with the valve core, the other end of the spring part is connected with the valve body, when the medium pressure of the first vent hole is smaller than the elastic force of the spring part, the valve core seals a channel between the first vent hole and the second vent hole under the elastic force action of the spring part, and when the medium pressure of the first vent hole is larger than the elastic force of the spring part, the valve core and the spring part are pushed by a medium to be compressed along the axial direction of the first vent hole, and the first vent hole is communicated with the second vent hole. The self-operated isolating valve disclosed by the utility model can be opened by using the medium pressure in the channel of the valve body, and the channel does not need to be independently arranged and the valve does not need to be opened by using other control gas, so that the device mechanism is simplified, and the weight and the cost of the isolating valve are greatly reduced.

Description

Isolation valve

Technical Field

The utility model relates to the technical field of valve structures, in particular to an isolation valve.

Background

In a fuel tank on a rocket engine, a valve is used for isolating the tank from upstream and downstream lines before rocket launching to prevent fuel leakage, and the valve is opened at the beginning of rocket launching to communicate the fuel tank with a fuel supply line. The isolating valve in the prior art adopts a metal diaphragm to close the valve, the cutter is pushed by powder explosion or high-pressure gas power to break the metal diaphragm, and the isolating valve is opened. The valve can also adopt a pushing and matching opening mode, when the control gas interface is accessed with control gas, the pneumatic piston pushes the piston through the ejector rod to push the piston out of the channel, so that the channel between the inlet and the outlet of the valve is opened, the mode needs to use independent control gas to open the isolating valve, which is equivalent to a whole set of control pipelines and control valves, and the isolating valve has heavy weight and high cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides an isolation valve, which is used for solving the defects that in the prior art, an additional control pipeline and a control valve are required to be added from the outside when the isolation valve is opened, the structure is complex, and the cost is high, realizing the effect that a channel is not required to be independently arranged and the valve is opened by using additional control gas, simplifying the mechanism of the device, and greatly reducing the weight and the cost of the isolation valve.

The utility model provides an isolation valve which comprises a valve body and a piston assembly, wherein the valve body is provided with a first vent hole and a second vent hole, the piston assembly is arranged in the first vent hole, the piston assembly comprises a spring piece and a valve core, one end of the spring piece is connected with the valve core, the other end of the spring piece is connected with the valve body, when the medium pressure of the first vent hole is smaller than the elastic force of the spring piece, the valve core seals a channel between the first vent hole and the second vent hole under the elastic force action of the spring piece, when the medium pressure of the first vent hole is larger than the elastic force of the spring piece, a medium pushes the valve core and the spring piece to be compressed along the axial direction of the first vent hole, and the first vent hole is communicated with the second vent hole.

According to the isolating valve provided by the utility model, the outer side wall of the valve core is in contact fit with the inner wall of the first vent hole to form a first sealing surface and a second sealing surface, the first sealing surface and the second sealing surface are sequentially arranged along the air inlet direction of the first vent hole, and the cross-sectional area of the first sealing surface is smaller than that of the second sealing surface.

According to the isolation valve provided by the utility model, when the valve core blocks the first vent hole and the second vent hole, the communication position of the second vent hole and the first vent hole is positioned between the first sealing surface and the second sealing surface.

According to the isolation valve provided by the utility model, the second vent hole is perpendicular to the first vent hole.

According to the isolation valve provided by the utility model, the valve core is provided with a first sealing ring at a position corresponding to the first sealing surface, and the valve core is provided with a second sealing ring at a position corresponding to the second sealing surface.

According to the isolation valve provided by the utility model, the spring part comprises a first spring, a second spring and a supporting block, the first spring and the second spring are coaxially connected through the supporting block, the first spring is connected with the valve core, and the second spring is connected with the valve body.

According to the isolation valve provided by the utility model, the piston assembly further comprises a gland, and the spring element is connected with the valve body through the gland.

According to the isolating valve provided by the utility model, the first vent holes are arranged in parallel, and the second vent holes are arranged in one-to-one correspondence with the first vent holes.

According to the isolating valve provided by the utility model, the first vent hole is internally provided with the two piston assemblies, and the two valve cores are arranged oppositely.

According to the isolating valve provided by the utility model, the valve body comprises a shell and a fixed block, the first vent hole is formed in the shell, two grooves which are coaxial with the first vent hole are formed in the fixed block, and the two spring pieces are respectively arranged in the two grooves.

The utility model provides an isolation valve, wherein a first vent hole and a second vent hole are formed in a valve body, a medium can enter from the first vent hole and is discharged from the second vent hole, a piston assembly is arranged in the first vent hole, a spring part controls the position of a valve core in the first vent hole through expansion, when the medium pressure of the first vent hole is smaller than the elastic force of the spring part, the valve core is in a closing position, the first vent hole is not communicated with the second vent hole, the isolation valve is closed, when the medium pressure of the first vent hole is larger than the elastic force of the spring part, the medium generates thrust on the end face of the valve core, meanwhile, the spring part is compressed, and the valve core moves under the pushing of the medium pressure until the first vent hole and the second vent hole are communicated and the isolation valve is opened. The utility model relates to a self-operated isolating valve which is used for a fuel storage tank of a rocket liquid engine, can open the valve by using the medium pressure in a channel of a valve body, does not need to separately set a channel and use other control gas to open the valve, simplifies the device mechanism, and greatly reduces the weight and the cost of the isolating valve.

In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the present invention will be further described with reference to the accompanying drawings or will be understood by the practice of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is one of the schematic structural views of an isolation valve provided by the present invention;

FIG. 2 is a second schematic structural view of an isolation valve provided in the present invention;

FIG. 3 is a third schematic structural view of an isolation valve provided in the present invention;

FIG. 4 is a fourth schematic view of the isolation valve of the present invention;

reference numerals:

100: a valve body; 110: a first vent hole; 120: a second vent hole; 130: a housing; 140: a fixed block; 141: a groove;

200: a piston assembly; 210: a spring member; 220: a valve core; 230: a gland; 211: a first spring; 212: a second spring; 213: a support block; 221: a first seal ring; 222: and a second seal ring.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the utility model, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1, 2 and 3, an isolation valve according to an embodiment of the present invention includes a valve body 100 and a piston assembly 200, the valve body 100 is configured with a first vent hole 110 and a second vent hole 120, the piston assembly 200 is disposed in the first vent hole 110, the piston assembly 200 includes a spring member 210 and a valve core 220, one end of the spring member 210 is connected to the valve core 220, and the other end of the spring member 210 is connected to the valve body 100, when a medium pressure of the first vent hole 110 is smaller than an elastic force of the spring member 210, the valve core 220 closes a passage between the first vent hole 110 and the second vent hole 120 under the elastic force of the spring member 210, and when the medium pressure of the first vent hole 110 is larger than the elastic force of the spring member 210, the medium pushes the valve core 220 and the spring member 210 to compress in an axial direction of the first vent hole 110, and the first vent hole 110 communicates with the second vent hole 120.

According to the isolation valve of the embodiment of the utility model, the first vent hole 110 and the second vent hole 120 are formed in the valve body 100, a medium can enter from the first vent hole 110 and can be discharged from the second vent hole 120, the piston assembly 200 is arranged in the first vent hole 110, the spring element 210 controls the position of the valve core 220 in the first vent hole 110 through expansion and contraction, as shown in fig. 2, when the medium pressure of the first vent hole 110 is smaller than the elastic force of the spring element 210, the valve core 220 is in a closed position, the first vent hole 110 is not communicated with the second vent hole 120, and the isolation valve is closed, as shown in fig. 3, when the medium pressure of the first vent hole 110 is larger than the elastic force of the spring element 210, the medium generates thrust on the end face of the valve core 220, and simultaneously compresses the spring element 210, and the valve core 220 moves under the push of the medium pressure until the first vent hole and the second vent hole are communicated and the isolation valve is opened. The utility model relates to a self-operated isolating valve which is used for a fuel storage tank of a rocket liquid engine, can open the valve by using the medium pressure in a channel of a valve body 100, does not need to separately set the channel and use other control gas to open the valve, simplifies the device mechanism, and greatly reduces the weight and the cost of the isolating valve.

According to an embodiment of the present invention, the outer sidewall of the valve element 220 contacts and cooperates with the inner wall of the first vent hole 110 to form a first sealing surface and a second sealing surface, the first sealing surface and the second sealing surface are sequentially arranged along the air intake direction of the first vent hole 110, and the cross-sectional area of the first sealing surface is smaller than that of the second sealing surface. In this embodiment, the valve element 220 is a stepped structure, and different positions of the outer side wall of the stepped surface of the valve element are in contact with the inner wall of the first vent hole 110 to form a first sealing surface and a second sealing surface, the first sealing surface seals the channel inside the valve body 100, and the second sealing surface prevents the medium from leaking outside and can reliably seal the fuel in the fuel storage tank.

In this embodiment, the valve core 220 is formed by two adjacent cylindrical sections with diameters d1 and d2, and two sections with diameters d1 and d2 are also arranged on the inner side wall of the first vent hole 110 to match with the two cylindrical sections with diameters d1 and d2, so as to form a first sealing surface and a second sealing surface with cross-sectional diameters d1 and d 2.

The magnitudes of d1 and d2 should satisfy the following equations:

the opening pressure P of the isolation valve, d1, d2, and the spring force F of the spring member 210 must satisfy the following equation:

considering the friction factor of the seal ring, 1.2 is preferable.

According to an embodiment of the present invention, in a case where the valve body 220 blocks the first vent hole 110 and the second vent hole 120, a communication position of the second vent hole 120 and the first vent hole 110 is located between the first sealing surface and the second sealing surface. In this embodiment, a first vent hole 110 and a second vent hole 120 are disposed in the valve body 100, two interfaces a and B are disposed on the surface of the valve body 100, wherein the interface a corresponds to the cylindrical section where the first sealing surface is located, the interface B corresponds to the cylindrical section where the second sealing surface is located, and the position corresponding to the second vent hole 120 is between the first cover and the second cover, when the second vent hole 120 enters a medium, a thrust force toward the interface a is generated on the first sealing surface, and a thrust force toward the spring element 210 is generated on the second sealing surface, i.e. the two thrust directions are opposite, since the cross-sectional area of the second sealing surface is larger than the cross-sectional area of the first sealing surface, the thrust force toward the second sealing surface is larger than the thrust force toward the first sealing surface, the valve element 220 is subjected to the thrust force toward the spring element 210, the spring element 210 is compressed, the valve element 220 is driven to move, until the isolating valve opens, and the first vent hole 110 is communicated with the second vent hole 120, the medium enters from the second vent hole 120 and is discharged from the first vent hole 110, so that the media in the first vent hole 110 and the second vent hole 120 can not flow in different directions, and the interface A and the interface B on the valve body 100 can be used as the inlet and the outlet of the medium, thereby improving the universality of the isolating valve.

According to an embodiment of the present invention, the second vent hole 120 is disposed perpendicular to the first vent hole 110. In this embodiment, the air inlet and outlet direction of the second vent hole 120 is perpendicular to the air inlet and outlet direction of the first vent hole 110, that is, the second vent hole 120 can be perpendicular to the outer side surface of the valve element 220 to allow air to enter, so as to directly act on the first sealing surface and the second sealing surface, thereby ensuring the acting effect.

According to an embodiment of the present invention, the valve element 220 is provided with a first sealing ring 221 at a position corresponding to the first sealing surface, and the valve element 220 is provided with a second sealing ring 222 at a position corresponding to the second sealing surface. In this embodiment, the valve element 220 has a first sealing ring 221 disposed on the outer side wall with a diameter d1 and contacting with the corresponding surface of the valve body 100 to form a first sealing surface, and the valve body 100 has a second sealing ring 222 disposed on the outer side wall with a diameter d2 and contacting with the corresponding surface of the valve body 100 to form a second sealing surface. The first seal 221 seals the internal passage of the valve body 100 and the second seal 222 prevents the medium from leaking out. The side wall of the first ventilation hole 110 in this embodiment is also provided as a stepped surface that mates with the stepped surface of the spool 220.

According to an embodiment of the present invention, the spring member 210 includes a first spring 211, a second spring 212, and a support block 213, the first spring 211 and the second spring 212 are coaxially connected through the support block 213, the first spring 211 is connected to the valve spool 220, and the second spring 212 is connected to the valve body 100. In this embodiment, in order to prevent the over-long stroke of the valve element 220 from moving from the position blocking the communication between the first vent hole 110 and the second vent hole 120 to the position where the first vent hole 110 and the second vent hole 120 communicate in the first vent hole 110, and thus causing the instability of the spring element 210, a form of connecting two springs in series may be adopted, that is, the first spring 211 and the second spring 212 are connected through the supporting block 213, and then the valve element 220 and the valve body 100 are respectively connected, so that the compression amount of a single spring is only half of the whole compression stroke, and the stable movement of the spring in the compression and expansion processes can be ensured by matching with the supporting block 213.

According to one embodiment of the present invention, the piston assembly 200 further includes a gland 230, and the spring member 210 is coupled to the valve body 100 through the gland 230. In this embodiment, one end of the spring element 210 is connected to the valve core 220, the other end is connected to the gland 230, the gland 230 is located at the end of the first vent hole 110, and the outer surface of the gland is connected to the valve body 100, so that the spring element 210 is fixed and is convenient to mount and dismount.

As shown in fig. 2 and 3, according to an embodiment of the present invention, the first ventilation holes 110 are multiple and parallel to each other, and the second ventilation holes 120 are disposed in one-to-one correspondence with the first ventilation holes 110. In this embodiment, the two first ventilation holes 110 are arranged in parallel, one end of each of the two first ventilation holes 110 is commonly communicated with one interface a, and each of the first ventilation holes 110 is provided with one piston assembly 200, so that a form in which the two valve cores 220 are arranged in parallel is formed, the two second ventilation holes 120 are also two and are respectively connected with the two first ventilation holes 110, and when two fuel tanks are used in parallel, the isolation valve may be in a form in which the two valve cores 220 of this embodiment are connected in parallel. In other embodiments, the number of the first venting holes 110 may be set according to the number of the actual fuel tanks, and the number of the first venting holes 110 may be adjusted according to actual requirements, as shown in fig. 1, that is, when only one fuel tank is used, a single valve core 220 may be used for a single fuel tank.

According to an embodiment of the present invention, two piston assemblies 200 are disposed in the first ventilation hole 110, and two valve cores 220 are disposed opposite to each other. In this embodiment, a first vent hole 110 is disposed in the valve body 100, two spring members 210 and two valve cores 220 are disposed in the first vent hole 110 and are coaxially disposed, the two spring members 210 are close to each other, the two valve cores 220 are respectively close to the end interfaces of the first vent hole 110, a first sealing surface is a contact surface between an end surface of the valve core 220 and a protrusion in the first vent hole 110, a first sealing ring 221 is disposed on the end surface of the valve core 220, and a second sealing surface is a surface between a side wall of the valve core 220 and the first vent hole 110. In this case, both ends of the first vent hole 110 may serve as an inlet and outlet port, which may reduce the stroke of the valve element 220 and improve the application range of the isolation valve.

As shown in fig. 4, according to an embodiment of the present invention, the valve body 100 includes a housing 130 and a fixing block 140, the housing 130 has a first vent hole 110 therein, the fixing block 140 has two grooves 141 coaxially disposed with the first vent hole 110 therein, and two spring members 210 are disposed in the two grooves 141, respectively. In this embodiment, the first vent hole 110 is disposed inside the casing 130, the fixing block 140 is disposed inside the casing 130 and fixed to the casing 130, the fixing block 140 has two grooves 141 along the axial direction of the first through hole, and respectively configured to accommodate two sets of valve cores 220 and spring members 210, the spring members 210 are disposed at the bottoms of the grooves 141 and fixed to the bottoms of the grooves 141, the valve cores 220 extend out of the grooves 141, the end surfaces of the valve cores 220 abut against protrusions on the first vent hole 110 on the casing 130, a first sealing ring 221 is disposed at the abutting position, and a second sealing ring 222 is disposed on the side wall of the valve cores 220 and contacts with the inner wall of the grooves 141 of the fixing block 140.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An isolation valve, characterized by: the valve body is provided with a first vent hole and a second vent hole, the piston assembly is arranged in the first vent hole, the piston assembly comprises a spring part and a valve core, one end of the spring part is connected with the valve core, the other end of the spring part is connected with the valve body, when the medium pressure of the first vent hole is smaller than the elastic force of the spring part, the valve core seals a channel between the first vent hole and the second vent hole under the elastic force action of the spring part, under the condition that the medium pressure of the first vent hole is larger than the elastic force of the spring part, a medium pushes the valve core and the spring part to be compressed along the axial direction of the first vent hole, and the first vent hole is communicated with the second vent hole.

2. The isolation valve of claim 1, wherein: the outer side wall of the valve core is in contact fit with the inner wall of the first vent hole to form a first sealing surface and a second sealing surface, the first sealing surface and the second sealing surface are sequentially arranged along the air inlet direction of the first vent hole, and the cross-sectional area of the first sealing surface is smaller than that of the second sealing surface.

3. The isolation valve of claim 2, wherein: and under the condition that the valve core blocks the first vent hole and the second vent hole, the communication position of the second vent hole and the first vent hole is positioned between the first sealing surface and the second sealing surface.

4. The isolation valve of claim 3, wherein: the second vent hole is arranged perpendicular to the first vent hole.

5. The isolation valve of claim 2, wherein: the valve core is provided with a first sealing ring at a position corresponding to the first sealing surface, and the valve core is provided with a second sealing ring at a position corresponding to the second sealing surface.

6. The isolation valve of claim 1, wherein: the spring part comprises a first spring, a second spring and a supporting block, the first spring and the second spring are coaxially connected through the supporting block, the first spring is connected with the valve core, and the second spring is connected with the valve body.

7. The isolation valve of claim 1, wherein: the piston assembly further comprises a gland, and the spring piece is connected with the valve body through the gland.

8. The isolation valve of claim 1, wherein: the first vent holes are arranged in parallel, and the second vent holes are arranged in one-to-one correspondence with the first vent holes.

9. The isolation valve of claim 1, wherein: two piston assemblies are arranged in the first vent hole, and the two valve cores are arranged in a back-to-back mode.

10. The isolation valve of claim 9, wherein: the valve body comprises a shell and a fixed block, wherein the shell is internally provided with a first vent hole, the fixed block is internally provided with two grooves which are coaxial with the first vent hole, and the spring pieces are respectively arranged in the two grooves.