CN117231758B - High-temperature-resistant stop valve for spaceflight - Google Patents
High-temperature-resistant stop valve for spaceflight Download PDFInfo
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- CN117231758B CN117231758B CN202311499966.XA CN202311499966A CN117231758B CN 117231758 B CN117231758 B CN 117231758B CN 202311499966 A CN202311499966 A CN 202311499966A CN 117231758 B CN117231758 B CN 117231758B
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- 238000007789 sealing Methods 0.000 claims abstract description 117
- 239000007788 liquid Substances 0.000 claims abstract description 101
- 230000017525 heat dissipation Effects 0.000 claims abstract description 36
- 238000004891 communication Methods 0.000 claims abstract description 34
- 230000001737 promoting effect Effects 0.000 claims abstract description 3
- 230000000670 limiting effect Effects 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 5
- 230000008093 supporting effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 24
- 230000001976 improved effect Effects 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000000112 cooling gas Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The invention discloses a aerospace high-temperature-resistant stop valve, and belongs to the technical field of valve structures. The aerospace high-temperature-resistant stop valve comprises a valve body, wherein a liquid inlet is formed in one side of the valve body, and the liquid inlet is connected with a liquid inlet pipe through a connecting structure; the other side of the valve body is provided with a liquid outlet, the liquid inlet is communicated with the liquid outlet through a communication hole, a valve plug for sealing the communication hole is arranged in the liquid outlet, and a sealing structure matched with the valve plug is arranged at one end, close to the liquid outlet, of the communication hole; the valve plug is arranged at the bottom end of the valve rod, a sliding hole for enabling the valve rod to be inserted into the liquid outlet is formed in the valve body, and the valve rod is in sealing sliding connection with the sliding hole; a valve cover is arranged above the valve body, and a lifting mechanism for driving the valve plug to lift is arranged on the valve cover; the valve rod is provided with a heat dissipation structure for promoting heat dissipation of the valve rod. The aerospace high-temperature-resistant stop valve ensures the sealing effect of the stop valve under the high-temperature condition and improves the heat dissipation effect of the valve body.
Description
Technical Field
The invention relates to the technical field of valve structures, in particular to a aerospace high-temperature-resistant stop valve.
Background
The stop valve is a valve which is used for blocking a flow passage through a valve plug by means of valve rod pressure, belongs to a forced sealing type valve, and is widely applied to aerospace. The aerospace equipment has a large quantity of high-temperature circulating media, the sealing performance of the high Wen Liutong media on the stop valve is high, and the sealing performance of the inside of the stop valve and the joint of the stop valve and a pipeline can be influenced by the high-temperature circulating media.
The existing stop valve is connected with a pipeline in a threaded or welded mode, and the stability of the connection of the stop valve and the pipeline is poor due to simple threaded connection, so that the tightness is affected. The welded joint is easy to influence the tightness due to the generation of cracks because the welding seam belongs to a functional weak area. In addition, the valve plug inside the existing stop valve generally adopts red copper, and the red copper has better heat conductivity, so that the heating uniformity and heat dissipation of the whole valve body are improved, but the red copper is in hard contact with the valve body, and the sealing effect of the valve body can be affected due to abrasion after long-term use.
Disclosure of Invention
The invention aims to provide a spaceflight high-temperature-resistant stop valve, which ensures the sealing effect of the stop valve under the high-temperature condition and improves the heat dissipation effect of a valve body.
In order to achieve the aim, the invention provides a aerospace high-temperature-resistant stop valve which comprises a valve body, wherein one side of the valve body is provided with a liquid inlet, and the liquid inlet is connected with a liquid inlet pipe through a connecting structure; the other side of the valve body is provided with a liquid outlet, the liquid inlet is communicated with the liquid outlet through a communication hole, a valve plug for sealing the communication hole is arranged in the liquid outlet, and a sealing structure matched with the valve plug is arranged at one end, close to the liquid outlet, of the communication hole; the valve plug is arranged at the bottom end of the valve rod, a sliding hole for enabling the valve rod to be inserted into the liquid outlet is formed in the valve body, and the valve rod is in sealing sliding connection with the sliding hole; a valve cover is arranged above the valve body, and a lifting mechanism for driving the valve plug to lift is arranged on the valve cover; the valve rod is provided with a heat dissipation structure for promoting heat dissipation of the valve rod;
the sealing structure comprises an annular first air cavity, a second air cavity and a third air cavity, wherein the communication hole is of a stepped hole structure with a large diameter at one end close to the liquid outlet and a small diameter at one end close to the liquid inlet, the second air cavity is fixed on the stepped surface, the first air cavity is positioned above the second air cavity and fixed on the side wall of the communication hole, the third air cavity is positioned below the second air cavity and fixed on the side wall of the communication hole, the first air cavity is communicated with the second air cavity through a first connecting hole, and the second air cavity is communicated with the third air cavity through a second connecting hole; the valve plug is provided with a first sealing ring which enables the first air cavity to be embedded, and a second sealing ring which enables the third air cavity to be embedded.
Preferably, the first air cavity, the second air cavity and the third air cavity are all elastic air cavities, a sealing gasket is arranged at the top end of the communication hole, a limiting plate is arranged at the top end of the valve plug, a through hole for the valve plug to pass through is arranged in the middle of the sealing gasket, and the aperture of the through hole is smaller than the diameter of the limiting plate.
Preferably, a connecting seat is arranged above the limiting plate, and the valve rod is connected with the valve plug through the connecting seat and the limiting plate; the bottom of the sliding hole is provided with a sealing groove matched with the connecting seat.
Preferably, the valve rod comprises an upper cylinder and a lower cylinder, the diameter of the upper cylinder is larger than that of the lower cylinder, and the upper cylinder is connected with the lower cylinder through a conical connecting section; the sliding hole is of a stepped hole type structure with a large hole diameter at the upper end and a small hole diameter at the lower end, a round table-shaped hole matched with the connecting section is arranged between the upper end and the lower end of the sliding hole, and a sealing sleeve for sealing the sliding hole and the valve rod is arranged in the sliding hole.
Preferably, the lifting mechanism comprises a motor, the motor is arranged on the sliding plate, two ends of the sliding plate are in sliding connection with the supporting rods arranged on the upper surface of the valve cover, an output shaft of the motor is connected with the valve rod, and the valve cover is provided with a threaded hole which enables the valve rod to penetrate through and be matched with external threads arranged on the outer surface of the valve rod.
Preferably, the heat dissipation structure comprises a heat dissipation sleeve, the heat dissipation sleeve is sleeved on the upper part of the valve rod, an air inlet pipe is arranged below the heat dissipation sleeve, the air inlet pipe is sleeved outside the valve rod, an air inlet cavity is arranged inside the air inlet pipe, the air inlet cavity is connected with a cavity communicated with the valve rod and the inside of the valve plug through a first air hole, and the air inlet cavity is connected with an external refrigeration device through an air inlet; the cavity is connected with a heat dissipation sleeve through a second air hole arranged on the side wall of the valve rod, and an air exhaust hole is arranged on the heat dissipation sleeve.
Preferably, a plurality of heat exchange cavities are arranged in the heat dissipation sleeve, the heat exchange cavities are in contact with the valve rod, and a plurality of cooling fins are arranged on the outer surface of the heat dissipation sleeve; the upper part of the heat dissipation sleeve is provided with an exhaust cavity which is communicated with the heat exchange cavity through a fourth air hole, and the exhaust cavity is provided with an exhaust hole; the lower part of the heat dissipation sleeve is provided with a flow equalizing cavity which is communicated with the heat exchange cavity through a third air hole, and the flow equalizing cavity is communicated with the cavity through a second air hole.
Preferably, the connecting structure comprises a fixing sleeve, the fixing sleeve is sleeved outside the liquid inlet pipe and is rotationally connected with the liquid inlet pipe, a limiting ring for limiting the fixing sleeve is arranged on the liquid inlet pipe, a fixing ring is arranged outside the liquid inlet, and the fixing sleeve is in threaded connection with the fixing ring; a sealing component is arranged between the liquid inlet pipe and the liquid inlet.
Preferably, the sealing assembly comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged on the liquid inlet pipe, an annular poking piece is arranged at the end head of the liquid inlet, an annular groove is arranged between the poking piece and the outer side surface of the liquid inlet, and the second sealing ring is arranged on the outer surface of the poking piece; a sealing cavity is formed among the first sealing ring, the second sealing ring, the outer side face of the liquid inlet and the inner side face of the liquid inlet pipe, inert gas is filled in the sealing cavity, and a sealing plug for sealing the gas charging port of the sealing cavity is arranged on the side wall of the liquid inlet pipe.
Preferably, the shutoff stopper includes the cock body, cock body and inflation hole sealing connection, and the center of cock body is provided with the mounting hole of installation round pin post, mounting hole and round pin post threaded connection, is provided with the sealing washer between mounting hole and the round pin post, and the top of round pin post is provided with the application of force seat, and the lower part of cock body is provided with a plurality of mounting groove, and the mounting groove slides and is provided with the dog, and the bottom of mounting groove is provided with the through-hole that makes the transfer line of dog end insert the mounting hole, and the conical surface contact of transfer line and round pin post bottom is provided with the spring between mounting groove and the dog.
The aerospace high-temperature-resistant stop valve has the advantages and positive effects that:
1. the communication hole is set to be a stepped hole, the first air cavity, the second air cavity and the third air cavity which are communicated are arranged at the stepped hole, when the valve plug extrudes the second air cavity, the first air cavity and the third air cavity are tightly wrapped in the first sealing ring and the second sealing ring, and tight sealing connection between the valve plug and the communication hole is realized.
2. The valve rod is provided with the conical surface, and the conical surface is matched with the conical surface in the sliding hole in an extrusion mode, so that the sealing effect between the valve rod and the sliding hole is improved.
3. The cavity that sets up the intercommunication in the inside of valve rod and valve plug to be connected with refrigerating plant through air inlet and exhaust hole, improve the protection to valve rod and valve plug. And the radiating fins on the radiating sleeve improve the radiating effect of the valve rod.
4. The liquid inlet pipe and the liquid inlet are locked and fixed through the fixing sleeve, a first sealing ring and a second sealing ring are arranged between the liquid inlet pipe and the liquid inlet, and an inert gas sealing cavity is arranged between the first sealing ring and the second sealing ring, so that the sealing effect between the liquid inlet pipe and the liquid inlet is improved. The plectrum that sets up on the inlet is favorable to improving the sealed effect between feed liquor pipe and the inlet.
5. The stopper is provided with the dog on the shutoff stopper, has improved the stability of shutoff stopper shutoff on the feed liquor pipe. The stopper is driven to slide through the pin, so that the plugging block can be conveniently installed and detached.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a aerospace high temperature resistant stop valve of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is a schematic view of the valve stem structure of an embodiment of a aerospace high temperature resistant stop valve of the present invention;
FIG. 4 is a schematic view of a heat dissipating structure of an embodiment of a aerospace high temperature resistant stop valve of the present invention;
FIG. 5 is a schematic cross-sectional view of a heat dissipation sleeve of an embodiment of a aerospace high temperature resistant shut-off valve of the present invention;
FIG. 6 is a schematic view of a connection structure of a liquid inlet of an embodiment of a high temperature resistant stop valve for aerospace use;
FIG. 7 is an enlarged view of B in FIG. 6;
FIG. 8 is a schematic cross-sectional view of a structural inlet of an embodiment of a aerospace high temperature resistant stop valve of the present invention;
FIG. 9 is a schematic illustration of a block structure of an embodiment of a aerospace refractory stop valve of the present invention.
Reference numerals
1. A valve body; 2. a liquid inlet; 3. a liquid outlet; 4. a communication hole; 5. a liquid inlet pipe; 6. a fixed sleeve; 7. a valve stem; 8. a valve plug; 9. sealing grooves; 10. sealing sleeve; 11. a valve cover; 12. a support rod; 13. a slide plate; 14. a motor; 15. a heat dissipation sleeve; 16. an air inlet pipe; 17. a heat sink; 18. a limiting plate; 19. a connecting seat; 20. a first seal ring; 21. a second seal ring; 22. a sealing gasket; 23. a first air chamber; 24. a second air chamber; 25. a third air chamber; 26. a first connection hole; 27. a second connection hole; 28. an upper column; 29. a lower column; 30. a connection section; 31. an air inlet cavity; 32. a flow equalizing cavity; 33. an exhaust chamber; 34. a heat exchange cavity; 35. an air inlet; 36. a first air hole; 37. a second air hole; 38. a third air hole; 39. a fourth air hole; 40. a first seal ring; 41. a second seal ring; 42. sealing the cavity; 43. sealing the plug; 44. a limiting ring; 45. a fixing ring; 46. a pulling piece; 47. a groove; 48. a plug body; 49. an air filling hole; 50. a pin; 51. a force application seat; 52. a mounting groove; 53. a stop block; 54. a transmission rod; 55. a spring; 56. and an exhaust hole.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Examples
As shown in fig. 1-9, the aerospace high temperature resistant stop valve comprises a valve body 1, wherein a liquid inlet 2 is arranged on one side of the valve body 1, and the liquid inlet 2 is connected with a liquid inlet pipe 5 through a connecting structure. The other side of the valve body 1 is provided with a liquid outlet 3, and the liquid inlet 2 is communicated with the liquid outlet 3 through a communication hole 4. The communication hole 4 is vertically arranged. The inside of liquid outlet 3 is provided with carries out confined valve plug 8 with the intercommunicating pore 4, and the one end that the intercommunicating pore 4 is close to liquid outlet 3 is provided with the seal structure with valve plug 8 adaptation. The valve plug 8 is matched with the sealing structure to realize the sealing of the communication hole 4. The valve plug 8 is fixedly arranged at the bottom end of the valve rod 7. The valve body 1 is provided with a slide hole for inserting the valve rod 7 into the liquid outlet 3, and the valve rod 7 is in sealed sliding connection with the slide hole. A valve cover 11 is arranged above the valve body 1, and the valve cover 11 is fixedly connected with the valve body 1 through bolts. The valve cover 11 is provided with a lifting mechanism for driving the valve plug 8 to lift, and the lifting mechanism drives the valve plug 8 to lift through the valve rod 7, so that the valve plug 8 is contacted with or separated from the sealing structure, the communication hole 4 is closed or opened, and the circulation or cutoff of fluid is realized. Be provided with the radiating heat radiation structure of promotion valve rod 7 on the valve rod 7, heat radiation structure is used for accelerating the heat dissipation of valve plug 8 and valve rod 7, reduces the influence of high temperature fluid to valve plug 8 and valve rod 7, is favorable to prolonging the service life of valve plug 8 and valve rod 7, guarantees the leakproofness of valve body 1.
The sealing structure comprises a first air cavity 23, a second air cavity 24 and a third air cavity 25 which are annular, and the first air cavity 23, the second air cavity 24 and the third air cavity 25 are integrated. The communicating hole 4 is a stepped hole structure with a large diameter near one end of the liquid outlet 3 and a small diameter near one end of the liquid inlet 2. The second air chamber 24 is fixed on the stepped surface, the first air chamber 23 is located above the second air chamber 24 and fixed on the side wall of the communication hole 4, and the third air chamber 25 is located below the second air chamber 24 and fixed on the side wall of the communication hole 4. The first air cavity 23, the second air cavity 24 and the third air cavity 25 are all elastic air cavities, namely the first air cavity 23, the second air cavity 24 and the third air cavity 25 are all made of elastic heat-resistant rubber, and the volume of the air cavities can be changed along with the size of the internal air pressure. The first air cavity 23 is communicated with the second air cavity 24 through a first connecting hole 26, and the second air cavity 24 is communicated with the third air cavity 25 through a second connecting hole 27.
The valve plug 8 is a stepped copper plug matched with the communication hole 4, and has a good heat conduction effect. The valve plug 8 is provided with a first sealing ring 20 for embedding a first air chamber 23 and a second sealing ring 21 for embedding a third air chamber 25. The valve rod 7 drives the valve plug 8 to move downwards, the valve plug 8 is inserted into the communication hole 4, the step surface of the valve plug 8 extrudes the second air cavity 24, gas in the second air cavity 24 enters the first air cavity 23 and the third air cavity 25 through the first connecting hole 26 and the second connecting hole 27 respectively, the air pressure in the first air cavity 23 and the third air cavity 25 is increased and expanded, and the first air cavity 23 and the third air cavity 25 are tightly embedded into the first sealing ring 20 and the second sealing ring 21, so that stable sealing between the communication hole 4 and the valve plug 8 is realized. Because the first air cavity 23 and the third air cavity 25 are elastic flexible structures, even if the valve body 1 vibrates, the valve body 1 still has a good sealing effect, and the sealing effect of the valve body 1 is improved.
The top end of the communication hole 4 is fixedly provided with a gasket 22, and the middle part of the gasket 22 is provided with a through hole for the valve plug 8 to pass through. The top of the valve plug 8 is fixedly provided with a limiting plate 18, and the aperture of the through hole is smaller than the diameter of the limiting plate 18. When the valve plug 8 is inserted into the communication hole 4, the limiting plate 18 has a limiting effect on the valve plug 8, and meanwhile, the limiting plate 18 is propped against the sealing gasket 22 to further seal the communication hole 4, so that the sealing effect is improved. The sealing gasket 22 is a graphite gasket, and has good heat resistance.
The connecting seat 19 is fixedly arranged above the limiting plate 18, and the valve rod 7 is connected with the valve plug 8 through the connecting seat 19 and the limiting plate 18. The bottom of slide hole is provided with the seal groove 9 with connecting seat 19 looks adaptation, sets up the sealing washer of graphite in the seal groove 9, and connecting seat 19 inserts in the seal groove 9, realizes the seal between connecting seat 19 and the seal groove 9, guarantees the sealed effect between valve plug 8 and the slide hole.
The valve rod 7 is a copper rod, and has a good heat dissipation effect. The valve rod 7 comprises an upper column 28 and a lower column 29 which are coaxial, the diameter of the upper column 28 is larger than that of the lower column 29, and the upper column 28 and the lower column 29 are connected through a conical connecting section 30. The upper column 28, the lower column 29 and the connecting section 30 are integrally formed. The sliding hole is of a stepped hole type structure with a large hole diameter at the upper end and a small hole diameter at the lower end, a round table-shaped hole matched with the connecting section 30 is arranged between the upper end and the lower end of the sliding hole, and a sealing sleeve 10 for sealing the sliding hole and the valve rod 7 is arranged in the sliding hole. The conical connecting section 30 is arranged on the valve rod 7, so that the connecting section 30 is contacted with the round table-shaped hole of the sliding hole in the descending process of the valve rod 7, and the sealing effect between the valve rod 7 and the sliding hole is improved.
The lifting mechanism comprises a motor 14, and the motor 14 is fixedly arranged on the sliding plate 13. Both ends of the sliding plate 13 are in sliding connection with a supporting rod 12 arranged on the upper surface of the valve cover 11. The bottom of the support rod 12 is fixedly connected with the valve cover 11, guide grooves are formed in the opposite side surfaces of the support rod 12, guide blocks matched with the guide grooves are arranged at the two ends of the sliding plate 13, and the guide blocks are inserted into the guide grooves and are in sliding connection with the guide grooves. The guide grooves and the guide blocks have a guiding function for the up-and-down sliding of the slide plate 13. The output shaft of the motor 14 is fixedly connected with the valve rod 7. The valve cover 11 is provided with a threaded hole for the valve rod 7 to pass through, and the threaded hole is matched with external threads arranged on the outer surface of the valve rod 7. The external thread is provided only on a section of the upper portion of the valve stem 7 which engages with the threaded hole.
The motor 14 drives the valve rod 7 to rotate, and the external screw thread of the valve rod 7 is meshed with the threaded hole of the valve cover 11, so that the valve rod 7 rotates to slide downwards, the motor 14 drives the sliding plate 13 to slide downwards synchronously, the valve rod 7 drives the valve plug 8 to move downwards, and the valve plug 8 is inserted in the communication hole 4, so that the fluid in the valve body 1 is cut off. The motor 14 is reversed, the valve rod 7 drives the valve plug 8 to rotate and move upwards, and the valve plug 8 is pulled out of the communication hole 4, so that fluid in the valve body 1 is circulated.
The heat radiation structure comprises a heat radiation sleeve 15, and the heat radiation sleeve 15 is fixedly sleeved on the upper part of the valve rod 7 by welding. The heat dissipation sleeve 15 is made of copper material and has a good heat dissipation effect. An air inlet pipe 16 is arranged below the heat dissipation sleeve 15, and the air inlet pipe 16 is fixedly sleeved outside the valve rod 7 in a welding mode. An air inlet cavity 31 is arranged in the air inlet pipe 16, and the air inlet cavity 31 is connected with cavities communicated with the inside of the valve rod 7 and the valve plug 8 through a first air hole 36 arranged on the side wall of the valve rod 7. The air inlet chamber 31 is connected to an external refrigeration device through an air inlet 35. The existing gas refrigerating device is selected as required by the refrigerating device.
The heat dissipation sleeve 15 is internally provided with a plurality of heat exchange cavities 34, and the number of the heat exchange cavities 34 is six in the embodiment, and the six heat exchange cavities 34 are uniformly distributed outside the valve rod 7 in a circumferential array. The heat exchange chamber 34 is in contact with the valve stem 7. A plurality of annular cooling fins 17 are arranged on the outer surface of the cooling sleeve 15 and are used for improving the heat exchange effect of the cooling sleeve 15. The upper portion of the heat dissipation sleeve 15 is provided with a vent chamber 33, and the vent chamber 33 communicates with the heat exchange chamber 34 through a fourth vent 39. The exhaust cavity 33 is provided with an exhaust hole 56, and the exhaust hole 56 is connected with an external refrigeration device for realizing circulation of cooling gas. The lower part of the heat dissipation sleeve 15 is provided with a flow equalizing cavity 32, the flow equalizing cavity 32 is communicated with the heat exchange cavity 34 through a third air hole 38, and the third air hole 38 corresponds to the heat exchange cavity 34 one by one. The flow equalizing cavity 32 is communicated with the cavity through a second air hole 37, and the second air hole 37 is positioned above the first air hole 36.
The refrigerating device enters low-temperature cooling gas into the air inlet cavity 31 through the air inlet 35, the cooling gas in the air inlet cavity 31 enters the cavity through the first air hole 36, the cooling gas is heavier and moves downwards, so that heat exchange is carried out with the lower part of the valve rod 7 and the valve plug 8, the temperature of the valve plug 8 and the valve rod 7 is reduced, and the valve plug 8 and the valve rod 7 are protected. The hot gas after heat exchange is lighter and moves upwards, the hot gas enters the flow equalizing cavity 32 through the second air hole 37, then enters the heat exchanging cavity 34 through the third air hole 38, further heat exchange is carried out between the heat exchanging cavity 34 and the valve rod 7, part of heat is dissipated through the cooling fin 17, finally enters the air exhausting cavity 33 through the fourth air hole 39, is discharged through the air exhaust hole 56, and is sent into the refrigerating device for refrigeration, and the next cycle is carried out. The setting of refrigerating plant has improved valve rod 7 and valve plug 8 radiating effect, protects valve rod 7 and valve plug 8, also is favorable to improving the sealed effect between valve rod 7, valve plug 8 and the valve body 1.
The connecting structure comprises a fixed sleeve 6, wherein the fixed sleeve 6 is sleeved outside the liquid inlet pipe 5 and is rotationally connected with the liquid inlet pipe 5, namely, one end of the fixed sleeve 6 is provided with a through hole for the liquid inlet pipe 5 to pass through, and the aperture of the through hole is slightly larger than the outer diameter of the liquid inlet pipe 5, so that the fixed sleeve 6 can rotate and slide outside the liquid inlet pipe 5. The liquid inlet pipe 5 is fixedly provided with a limiting ring 44 for limiting the fixed sleeve 6, the outer diameter of the limiting ring 44 is larger than the aperture of the through hole of the fixed sleeve 6, and the limiting ring 44 limits the position of the fixed sleeve 6. The outside of the liquid inlet 2 is fixedly provided with a fixed ring 45, and the fixed sleeve 6 is in threaded connection with the fixed ring 45.
Firstly, the liquid inlet pipe 5 is spliced with the liquid inlet 2, one end of the liquid inlet pipe 5 is abutted against the fixed ring 45, the fixed sleeve 6 is rotated, the fixed sleeve 6 is connected with the fixed ring 45 through threads until one end of the fixed sleeve 6 is abutted against the limiting ring 44, and locking connection between the liquid inlet pipe 5 and the liquid inlet 2 is achieved.
A sealing component is arranged between the liquid inlet pipe 5 and the liquid inlet 2. The sealing assembly comprises a first sealing ring 40 and a second sealing ring 41, wherein the first sealing ring 40 is arranged on the liquid inlet pipe 5. The end of the liquid inlet 2 is provided with an annular plectrum 46, an annular groove 47 is arranged between the plectrum 46 and the outer side surface of the liquid inlet 2, and the second sealing ring 41 is arranged on the outer surface of the plectrum 46. The plectrum 46 and the inlet 2 are in an integral structure, and the opening of the groove 47 faces the flowing direction of the medium. When the medium flows, the medium with high pressure enters the groove 47, and the outward thrust is applied to the groove 47, so that the poking plate 46 has a trend of outward extrusion, the second sealing ring 41 is tightly attached to the inner wall of the liquid inlet pipe 5, and the sealing effect between the liquid inlet pipe 5 and the liquid inlet 2 is improved. The first seal ring 40 and the second seal ring 41 are heat-resistant graphite rings.
The first sealing ring 40, the second sealing ring 41, the outer side surface of the liquid inlet 2 and the inner side surface of the liquid inlet pipe 5 form a sealing cavity 42, and inert gas is filled in the sealing cavity 42. The inert gas has certain outward pressure on the first sealing ring 40 and the second sealing ring 41, so that the medium outside the second sealing ring 41 is less likely to enter the sealing cavity 42 through the second sealing ring 41, and the sealing effect between the liquid inlet pipe 5 and the liquid inlet 2 is improved.
A blocking plug 43 for blocking the inflation inlet of the sealing cavity 42 is arranged on the side wall of the liquid inlet pipe 5. The sealing plug 43 comprises a plug body 48, wherein the plug body 48 is made of rubber, and the diameter of the plug body 48 is slightly larger than the aperture of the inflation hole 49, so that the plug body 48 is in sealing connection with the inflation hole 49. The center of the plug 48 is provided with a mounting hole for mounting the pin 50, and the mounting hole is in threaded connection with the pin 50. A sealing ring is arranged in the mounting hole, so that the tightness between the pin 50 and the mounting hole is ensured. The tip of the pin 50 is provided with a biasing seat 51, and the top of the plug 48 is provided with a groove into which the biasing seat 51 is inserted. The lower part of the plug body 48 is provided with a plurality of mounting grooves 52, and the mounting grooves 52 are slidably provided with stoppers 53. The bottom of the mounting groove 52 is provided with a through hole for inserting a transmission rod 54 at the end of the stop block 53 into the mounting hole. A spring 55 is arranged between the mounting groove 52 and the stop block 53, and the spring 55 is sleeved on the transmission rod 54. Both ends of the spring 55 are fixedly connected with the mounting groove 52 and the stop block 53 respectively. The transmission rod 54 contacts with the conical surface at the bottom of the pin 50 under the elastic force of the spring 55.
The pin 50 is driven to rotate by the force application seat 51, the pin 50 is screwed in the mounting hole, the pin 50 drives the conical surface at the bottom to synchronously move downwards, the conical surface pushes the transmission rod 54 to slide outwards, the spring 55 is lengthened, the stop block 53 moves outwards under the action of the transmission rod 54 and abuts against the inner wall of the liquid inlet pipe 5, the plug 48 is fixed, and the mounting stability of the plug 48 is improved. When the pin 50 is unscrewed, the transmission rod 54 slides inwards under the action of the spring 55, and the stopper 53 is retracted into the mounting groove 52, so that the plug body 48 can be taken out of the air charging hole 49.
Therefore, the aerospace high-temperature-resistant stop valve ensures the sealing effect of the stop valve under the high-temperature condition and improves the heat dissipation effect of the valve body.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (10)
1. A spaceflight high temperature resistant stop valve which is characterized in that: the valve comprises a valve body, wherein a liquid inlet is formed in one side of the valve body and is connected with a liquid inlet pipe through a connecting structure; the other side of the valve body is provided with a liquid outlet, the liquid inlet is communicated with the liquid outlet through a communication hole, a valve plug for sealing the communication hole is arranged in the liquid outlet, and a sealing structure matched with the valve plug is arranged at one end, close to the liquid outlet, of the communication hole; the valve plug is arranged at the bottom end of the valve rod, a sliding hole for enabling the valve rod to be inserted into the liquid outlet is formed in the valve body, and the valve rod is in sealing sliding connection with the sliding hole; a valve cover is arranged above the valve body, and a lifting mechanism for driving the valve plug to lift is arranged on the valve cover; the valve rod is provided with a heat dissipation structure for promoting heat dissipation of the valve rod;
the sealing structure comprises an annular first air cavity, a second air cavity and a third air cavity, wherein the communication hole is of a stepped hole structure with a large diameter at one end close to the liquid outlet and a small diameter at one end close to the liquid inlet, the second air cavity is fixed on the stepped surface, the first air cavity is positioned above the second air cavity and fixed on the side wall of the communication hole, the third air cavity is positioned below the second air cavity and fixed on the side wall of the communication hole, the first air cavity is communicated with the second air cavity through a first connecting hole, and the second air cavity is communicated with the third air cavity through a second connecting hole; the valve plug is provided with a first sealing ring which enables the first air cavity to be embedded, and a second sealing ring which enables the third air cavity to be embedded.
2. The aerospace high temperature resistant stop valve of claim 1, wherein: the first air cavity, the second air cavity and the third air cavity are all elastic air cavities, a sealing gasket is arranged at the top end of the communication hole, a limiting plate is arranged at the top end of the valve plug, a through hole for the valve plug to pass through is arranged in the middle of the sealing gasket, and the aperture of the through hole is smaller than the diameter of the limiting plate.
3. The aerospace high temperature resistant stop valve of claim 2, wherein: a connecting seat is arranged above the limiting plate, and the valve rod is connected with the valve plug through the connecting seat and the limiting plate; the bottom of the sliding hole is provided with a sealing groove matched with the connecting seat.
4. A aerospace high temperature resistant shut off valve according to claim 3, wherein: the valve rod comprises an upper cylinder and a lower cylinder, the diameter of the upper cylinder is larger than that of the lower cylinder, and the upper cylinder is connected with the lower cylinder through a conical connecting section; the sliding hole is of a stepped hole type structure with a large hole diameter at the upper end and a small hole diameter at the lower end, a round table-shaped hole matched with the connecting section is arranged between the upper end and the lower end of the sliding hole, and a sealing sleeve for sealing the sliding hole and the valve rod is arranged in the sliding hole.
5. The aerospace high temperature resistant stop valve of claim 4, wherein: the lifting mechanism comprises a motor, the motor is arranged on the sliding plate, two ends of the sliding plate are in sliding connection with supporting rods arranged on the upper surface of the valve cover, an output shaft of the motor is connected with the valve rod, and a threaded hole which enables the valve rod to penetrate through and be matched with external threads arranged on the outer surface of the valve rod is formed in the valve cover.
6. The aerospace high temperature resistant stop valve of claim 5, wherein: the heat radiation structure comprises a heat radiation sleeve, the heat radiation sleeve is sleeved on the upper part of the valve rod, an air inlet pipe is arranged below the heat radiation sleeve, the air inlet pipe is sleeved outside the valve rod, an air inlet cavity is arranged inside the air inlet pipe, the air inlet cavity is connected with a cavity communicated with the valve rod and the inside of the valve plug through a first air hole, and the air inlet cavity is connected with an external refrigeration device through an air inlet; the cavity is connected with a heat dissipation sleeve through a second air hole arranged on the side wall of the valve rod, and an air exhaust hole is arranged on the heat dissipation sleeve.
7. The aerospace high temperature resistant stop valve of claim 6, wherein: a plurality of heat exchange cavities are arranged in the heat dissipation sleeve, the heat exchange cavities are in contact with the valve rod, and a plurality of cooling fins are arranged on the outer surface of the heat dissipation sleeve; the upper part of the heat dissipation sleeve is provided with an exhaust cavity which is communicated with the heat exchange cavity through a fourth air hole, and the exhaust cavity is provided with an exhaust hole; the lower part of the heat dissipation sleeve is provided with a flow equalizing cavity which is communicated with the heat exchange cavity through a third air hole, and the flow equalizing cavity is communicated with the cavity through a second air hole.
8. The aerospace high temperature resistant stop valve of claim 7, wherein: the connecting structure comprises a fixing sleeve, the fixing sleeve is sleeved outside the liquid inlet pipe and is rotationally connected with the liquid inlet pipe, a limiting ring for limiting the fixing sleeve is arranged on the liquid inlet pipe, a fixing ring is arranged outside the liquid inlet, and the fixing sleeve is in threaded connection with the fixing ring; a sealing component is arranged between the liquid inlet pipe and the liquid inlet.
9. The aerospace high temperature resistant stop valve of claim 8, wherein: the sealing assembly comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged on the liquid inlet pipe, an annular poking piece is arranged at the end head of the liquid inlet, an annular groove is arranged between the poking piece and the outer side surface of the liquid inlet, and the second sealing ring is arranged on the outer surface of the poking piece; a sealing cavity is formed among the first sealing ring, the second sealing ring, the outer side face of the liquid inlet and the inner side face of the liquid inlet pipe, inert gas is filled in the sealing cavity, and a sealing plug for sealing the gas charging port of the sealing cavity is arranged on the side wall of the liquid inlet pipe.
10. The aerospace high temperature resistant stop valve of claim 9, wherein: the plug comprises a plug body, the plug body is in sealing connection with an inflation hole, the center of the plug body is provided with a mounting hole for mounting a pin, the mounting hole is in threaded connection with the pin, a sealing ring is arranged between the mounting hole and the pin, the top end of the pin is provided with a force application seat, the lower part of the plug body is provided with a plurality of mounting grooves, a stop block is arranged in the mounting grooves in a sliding manner, the bottom of the mounting grooves is provided with a through hole for enabling a transmission rod of the stop block end to be inserted into the mounting hole, the transmission rod is in contact with a conical surface of the bottom of the pin, and a spring is arranged between the mounting grooves and the stop block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311499966.XA CN117231758B (en) | 2023-11-13 | 2023-11-13 | High-temperature-resistant stop valve for spaceflight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311499966.XA CN117231758B (en) | 2023-11-13 | 2023-11-13 | High-temperature-resistant stop valve for spaceflight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117231758A CN117231758A (en) | 2023-12-15 |
| CN117231758B true CN117231758B (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311499966.XA Active CN117231758B (en) | 2023-11-13 | 2023-11-13 | High-temperature-resistant stop valve for spaceflight |
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| Country | Link |
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| CN (1) | CN117231758B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2369207A1 (en) * | 2010-03-09 | 2011-09-28 | R. Nussbaum AG | Valve |
| CN104061333A (en) * | 2014-06-06 | 2014-09-24 | 温州市隆潮阀门有限公司 | High temperature resistant pneumatic stop valve |
| CN205118263U (en) * | 2015-11-02 | 2016-03-30 | 沈阳市永安衬胶阀门管道有限责任公司 | Line with rubber stop valve |
| WO2017167223A1 (en) * | 2016-03-31 | 2017-10-05 | 邹岳明 | Spool assembly and shut-off valve |
| CN217177458U (en) * | 2022-03-28 | 2022-08-12 | 温州金波阀门有限公司 | Corrugated pipe stop valve with valve seat double-sealing structure |
-
2023
- 2023-11-13 CN CN202311499966.XA patent/CN117231758B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2369207A1 (en) * | 2010-03-09 | 2011-09-28 | R. Nussbaum AG | Valve |
| CN104061333A (en) * | 2014-06-06 | 2014-09-24 | 温州市隆潮阀门有限公司 | High temperature resistant pneumatic stop valve |
| CN205118263U (en) * | 2015-11-02 | 2016-03-30 | 沈阳市永安衬胶阀门管道有限责任公司 | Line with rubber stop valve |
| WO2017167223A1 (en) * | 2016-03-31 | 2017-10-05 | 邹岳明 | Spool assembly and shut-off valve |
| CN217177458U (en) * | 2022-03-28 | 2022-08-12 | 温州金波阀门有限公司 | Corrugated pipe stop valve with valve seat double-sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117231758A (en) | 2023-12-15 |
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