CN107314152B - Ultrahigh-temperature high-pressure steam vent valve - Google Patents
Ultrahigh-temperature high-pressure steam vent valve Download PDFInfo
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- CN107314152B CN107314152B CN201710696831.0A CN201710696831A CN107314152B CN 107314152 B CN107314152 B CN 107314152B CN 201710696831 A CN201710696831 A CN 201710696831A CN 107314152 B CN107314152 B CN 107314152B
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- sleeve
- valve
- valve seat
- disc spring
- labyrinth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
- F16K1/427—Attachment of the seat to the housing by one or more additional fixing elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
- F16K1/465—Attachment of sealing rings to the valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to an ultra-temperature high-pressure steam vent valve, which comprises a valve body, wherein a stuffing box is arranged in the valve body, and a labyrinth sleeve is assembled in the stuffing box through a fastener, so that a labyrinth flow passage opening of the labyrinth sleeve is communicated with a strip flow passage groove of the stuffing box; the inner ring of one end of the labyrinth sleeve extending out of the stuffing box is also in butt joint with one end of the valve seat, and the other end of the valve seat is connected with a valve seat bottom plate provided with a diversion hole; the outer diameter of one end of the large valve core is matched with the inner diameter of the stuffing box, and the other end of the large valve core extends into the valve seat and is abutted against the inner diameter of the valve seat; one end of the mandrel penetrates through the stuffing box and the valve cover and stretches into the large valve core. According to the invention, the long-strip flow channel grooves are arranged on the outer side of the stuffing box to be communicated with the labyrinth sleeve flow channel openings of the labyrinth sleeve, so that direct impact of high-pressure differential steam on the labyrinth sleeve is avoided, the service life of the labyrinth sleeve is prolonged, and the flow channel openings and the long-strip flow channel grooves ensure inflow and outflow of steam.
Description
Technical Field
The invention relates to the field of valves, in particular to an ultrahigh-temperature high-pressure steam vent valve.
Background
Currently, existing steam vent valves basically rely on inlet products, and most of the existing steam vent valves are of multi-hole type or labyrinth type sleeve valve structures, self-sealing valve covers, valve seat and valve body integrated type and pilot valve core structures. Because the ultrahigh pressure difference is used in the emptying occasion, the use requirement of high pressure difference can be met only by using a multi-layer porous sleeve structure, and the labyrinth sleeve structure is adopted, but the connection with the stuffing box is not designed well, so that a plurality of labyrinth sleeves are integrated with the valve seat and are connected with the valve seat through lengthening screws, and the screws bear great medium pressure. The sleeve structure and the pilot valve core have no problems, the pilot valve core is more favorable for sealing requirements above V level, and the sleeve structure is more suitable for high pressure differential media. However, in the actual use process, the noise exceeds the standard due to the fact that the number of the depressurization steps is insufficient by adopting the porous sleeve; the labyrinth sleeve is arranged on the valve seat, and high-pressure medium is directly introduced into the valve seat without depressurization, so that the connecting pin bears great pressure, the pin is possibly broken or invalid, and finally the labyrinth sleeve is scattered and accidents are caused, so that the design of the steam vent valve suitable for high temperature and high pressure is urgently needed.
Disclosure of Invention
The applicant has made research and improvement to the above existing problems, and provides an ultra-high temperature high pressure steam vent valve, which not only solves various problems in the operation process of the valve, but also ensures safe and continuous operation of the steam vent valve, meets the field use requirement, and comprehensively exceeds and replaces import in product performance.
The technical scheme adopted by the invention is as follows:
the ultrahigh-temperature high-pressure steam vent valve comprises a valve body, wherein a stuffing box is arranged in the valve body, and a labyrinth sleeve is assembled in the stuffing box through a fastener, so that a labyrinth runner port of the labyrinth sleeve is communicated with a strip runner groove of the stuffing box; the valve seat bottom plate is arranged at the inner ring of one end of the labyrinth sleeve, which extends out of the stuffing box, and is also in butt joint with one end of the valve seat, and the other end of the valve seat is connected with a diversion hole; the outer diameter of one end of the large valve core is matched with the inner diameter of the stuffing box, and the other end of the large valve core extends into the valve seat and is abutted against the inner diameter of the valve seat; one end of the mandrel penetrates through the stuffing box and the valve cover and stretches into the large valve core.
The further technical scheme is as follows:
a flange is formed along the outer ring of the valve seat in a circumferential direction, the lower surface of the flange is abutted against a step in the valve body, and a valve seat self-sealing ring is further arranged in the flange at the abutting position of the lower surface of the flange and the step in the valve body; a valve seat quarter ring is further arranged on the upper surface of the valve seat flange, an annular groove is formed in the upper surface of the valve seat flange along the circumferential direction, a disc spring pressing sleeve is arranged on the surface of the valve seat quarter ring, one end of an inner hexagonal cylindrical head screw penetrates through the disc spring pressing sleeve, the valve seat quarter ring and is in butt joint with the bottom surface of the annular groove, an anti-loosening disc spring is further sleeved in the disc spring pressing sleeve and on the periphery of the inner hexagonal cylindrical head screw, a screw pressing plate is further arranged in the disc spring pressing sleeve, and a set screw penetrates through the screw pressing plate and presses the countersunk end of the inner hexagonal cylindrical head screw;
the disc spring pressing sleeve is of a rectangular block structure, a screw mounting hole for being matched with an inner hexagonal cylindrical head screw is formed in the center of the disc spring pressing sleeve in the vertical direction, a pressing plate opening for being assembled with a screw pressing plate is formed in one side of the disc spring pressing sleeve in the transverse direction, the pressing plate opening penetrates through two opposite side surfaces of the disc spring pressing sleeve in the transverse direction, and a pair of protruding blocks for being matched with the annular groove are formed in the lower portion of the disc spring pressing sleeve in an extending mode;
one end of the labyrinth sleeve is arranged on a step of the inner diameter of the stuffing box, when the labyrinth sleeve is assembled with the stuffing box, an inner sleeve positioning pin, an outer sleeve positioning pin, an inner sleeve joint pin and an outer sleeve joint pin, wherein the inner sleeve joint pin and the outer sleeve joint pin are used for preventing the labyrinth sleeve from rotating in the stuffing box, the outer ring of one end of the labyrinth sleeve extending out of the stuffing box is tightly pressed by a sleeve pressing plate, and the contact surface of the sleeve pressing plate and the stuffing box is fixedly connected by an inner sleeve pressing screw after being welded;
the positioning pin is arranged at the upper half part of the matching part of the outer diameter of the labyrinth sleeve and the inner diameter of the sleeve pressing plate;
the end part of the valve seat is provided with a step part extending inwards, and the valve seat bottom plate moves along the axial direction of the valve seat when being installed until the two ends of the valve seat bottom plate are abutted with the step part;
the valve cover is fixedly connected to one end of the valve body through a valve cover full-thread stud and a valve cover hexagonal nut, a lifting nut transition plate and a lifting nut are also assembled on the surface of the valve cover in sequence from bottom to top, and the lifting nut compresses the lifting nut transition plate on the surface of the valve cover through a hexagonal head bolt and a hexagonal nut;
a packing pressing sleeve is further arranged at one end of the mandrel, extending out of the packing box, along the periphery of the mandrel, one end of the packing pressing sleeve extends into the packing box, and packing gaskets are further sequentially arranged at the matching position of the outer diameter of the mandrel and the inner diameter of the packing box and the outer ring of the mandrel; the packing gland is arranged on the packing gland, a disc spring limit sleeve with a second disc spring is arranged on the packing gland, one end of a packing full-thread stud penetrates through the disc spring limit sleeve, the second disc spring and the packing gland and then is connected with the end part of the packing box, and one end of the packing full-thread stud is locked through a packing hexagonal nut;
a travel nut is fixed on the surface of the large valve core through an anti-loosening joint screw, a plurality of valve core guide rings are assembled along the periphery of the large valve core, a disc spring spacer for contacting a mandrel is arranged in the large valve core, and a first disc spring which is in butt joint with the disc spring spacer is arranged at the lower part of the disc spring spacer and in the large valve core;
the valve seat is provided with an upper inclined surface which is inclined downwards along the circumferential direction from the upper part of the sealing ring, the valve seat is provided with a lower inclined surface which is inclined upwards along the circumferential direction from the lower part of the sealing ring, the inclined directions of the upper inclined surface and the lower inclined surface are opposite, and the valve seat is made of metal materials from the sealing ring.
The beneficial effects of the invention are as follows:
(1) The long-strip flow channel grooves are formed in the outer side of the stuffing box to be communicated with the labyrinth sleeve flow channel openings of the labyrinth sleeve, so that direct impact of high-pressure-difference steam on the labyrinth sleeve is avoided, the service life of the labyrinth sleeve is prolonged, and the flow channel openings and the long-strip flow channel grooves ensure inflow and outflow of steam.
(2) The high-pressure high-speed medium firstly enters the labyrinth sleeve through the strip groove of the stuffing box and flows out, the labyrinth sleeve is hardly subjected to direct impact force, and the risk that the labyrinth sleeve 17 is damaged by flushing is reduced. The inner sleeve and outer sleeve joint pin is arranged in the connection of the labyrinth sleeve and the stuffing box to prevent the labyrinth sleeve 17 from rotating under the action of high-speed fluid unbalance force in the stuffing box, and the inner sleeve positioning pin, the sleeve pressing plate and the inner sleeve pressing screw ensure the safety of the up-and-down movement of the large valve core in the labyrinth sleeve, so that on one hand, the noise is reduced, on the other hand, the use safety is ensured, the long-time safe operation on site is ensured, and the service life of the valve is prolonged.
(3) In the invention, micro-deformation and sealing effects are realized by utilizing the upper inclined surface and the lower inclined surface of the self-sealing ring of the valve seat, and the diameter difference between the sealing surface of the large valve core and the sealing surface of the self-sealing ring forms a self-sealing area. When the valve is closed, huge medium pressure is tightly pressed on the upper part of the valve seat, so that the self-sealing ring of the valve seat is tightly pressed, and the effect that the sealing effect is better as the medium pressure is higher is achieved. The self-sealing effect is realized by utilizing the pressure of the medium, the use risk that the winding gasket needs larger pretightening specific pressure and graphite creep is easy to generate at high temperature in the past is avoided, and the sealing between the valve seat and the valve body is fundamentally realized.
(4) And a screw pressing plate is further arranged in the disc spring pressing sleeve, and a set screw penetrates through the screw pressing plate and presses the countersunk head end of the hexagon socket head cap screw, so that the hexagon socket head cap screw is prevented from loosening. The hexagon socket head cap screw directly gets into the ring channel of disk seat up end through the disk seat tetrad ring, makes the disk seat tetrad ring can not radially remove, and the lug of disk spring press cover lower part cooperates with the ring channel of disk seat, prevents that disk spring press cover from rotating and producing not hard up, and the screw clamp plate gets into and screw set screw from the clamp plate trompil of disk spring press cover to compress tightly hexagon socket head cap screw, make hexagon socket head cap screw unable withdraw from, stopped the not hard up possibility of disk seat, ensured the safe handling of disk seat.
(5) The middle part of disk seat and valve body complex position, set up the guide part at the outer lane of disk seat, set up middle empty structure between adjacent guide part, enable the better direction of disk seat and valve body on the one hand, on the other hand avoid the disk seat to move with big case when high Wen Kasi, because disk seat thermal expansion can have the release space. The valve seat bottom plate is welded with the valve seat by the step part, and even if a welding line fails, the valve seat bottom plate is not easy to separate from the valve seat, so that the cost is reduced, and the safe operation of the valve seat is ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged schematic view of fig. 1 at i.
Fig. 3 is an enlarged schematic view of fig. 1 at ii.
Fig. 4 is an enlarged schematic view of fig. 1 at iii.
Fig. 5 is a schematic diagram of a combination of a stuffing box and an inner sleeve according to the present invention.
Fig. 6 is a schematic structural view of a disc spring pressing sleeve according to the present invention.
Wherein: 1. a valve body; 2. a stuffing box; 3. a large valve core; 4. a mandrel; 5. a valve seat; 501. a valve seat bottom plate; 502. a flange; 503. an annular groove; 6. the valve seat is self-sealing; 601. an upper inclined surface; 602. a lower inclined surface; 7. a valve seat quarter ring; 8. a locking disc spring; 9. a disc spring pressing sleeve; 901. a screw mounting hole; 902. opening holes on the pressing plate; 903. a bump; 10. a hexagon socket head cap screw; 11. a screw press plate; 12. a set screw; 13. lifting the nut; 14. lifting a nut transition plate; 15. a valve cover; 16. four-way rings of the stuffing box; 17. a labyrinth sleeve; 18. a sleeve pressing plate; 19. an inner sleeve and an outer sleeve joint pin; 20. an inner sleeve compresses the screw; 21. an inner sleeve positioning pin and an outer sleeve positioning pin; 22. disc spring spacer; 23. a first belleville spring; 24. a seal ring pressure plate; 25. the valve cover is self-sealing; 26. a valve core guide ring; 27. a travel nut; 28. anti-loosening joint screws; 29. a valve cover full-thread stud; 30. a valve cap hexagonal nut; 31. a hex head bolt; 32. a hexagonal nut; 33. a filler liner; 34. a filler; 35. packing pressing sleeve; 36. a packing gland; 37. a filler full-thread stud; 38. a packing hex nut; 39. a second belleville spring; 40. disc spring stop collar.
Detailed Description
The following describes specific embodiments of the present invention.
As shown in fig. 1, the ultra-temperature high-pressure steam vent valve comprises a valve body 1, a stuffing box 2 is arranged in the valve body 1, a labyrinth sleeve 17 is assembled in the stuffing box 2 through a fastener, so that a labyrinth runner port of the labyrinth sleeve 17 is communicated with a strip runner groove of the stuffing box 2, the strip runner groove is arranged on the outer side of the stuffing box 2, and the strip runner groove is communicated with the labyrinth runner port of the labyrinth sleeve 17, so that direct impact of high-pressure difference steam on the labyrinth sleeve 17 is avoided, the labyrinth sleeve is protected, and the labyrinth runner port is communicated with the strip runner groove to ensure inflow and outflow of steam. The inner ring of one end of the labyrinth sleeve 17 extending out of the stuffing box 2 in the valve body 1 is also in butt joint with one end of the valve seat 5, and the other end of the valve seat 5 is connected with a valve seat bottom plate 501 provided with a diversion hole; the outer diameter of one end of the large valve core 3 is matched with the inner diameter of the stuffing box 2, the other end of the large valve core 3 stretches into the valve seat 5 and is abutted against the inner diameter of the valve seat 5, the valve seat 5 is in a jazz cap shape, and one end of the mandrel 4 penetrates through the stuffing box 2 and the valve cover 15 and stretches into the large valve core 3.
As shown in fig. 1, 2 and 5, one end of the labyrinth sleeve 17 is disposed on a step of the inner diameter of the stuffing box 2, when the labyrinth sleeve 17 is assembled with the stuffing box 2, an inner sleeve positioning pin 21 and an outer sleeve joint pin 19 for preventing the labyrinth sleeve 17 from rotating inside the stuffing box 2 are respectively mounted at the matching position of the outer diameter of the labyrinth sleeve 17 and the inner diameter of the stuffing box 2, the outer ring of the end of the labyrinth sleeve 17 extending out of the stuffing box 2 is tightly pressed by a sleeve pressing plate 18, the contact surface of the sleeve pressing plate 18 and the stuffing box 2 is fixedly connected by an inner sleeve pressing screw 20 after being welded, and the inner sleeve positioning pin 21 is disposed at the upper half part of the matching position of the outer diameter of the labyrinth sleeve 17 and the inner diameter of the sleeve pressing plate 18. In the process of assembling the labyrinth sleeve 17 and the stuffing box 2, the labyrinth sleeve 17 is firstly arranged in the stuffing box 2, the labyrinth flow port of the Ji Migong sleeve 17 and the strip groove of the stuffing box 2 are pressed by the sleeve pressing plate 18, then the inner sleeve pressing screw 20 is used for pressing, the inner sleeve positioning pin 21 and the outer sleeve positioning pin 21 are arranged, the inner sleeve joint pin 19 and the outer sleeve joint pin 19 are arranged on the split sleeve pressing plate 18, then the sleeve pressing plate 18 is pressed, and the contact surface of the sleeve pressing plate 18 and the stuffing box 2 is welded in the circumferential direction. The high-pressure high-speed medium firstly enters the labyrinth sleeve 17 through the strip groove of the stuffing box 2 and flows out, the labyrinth sleeve 17 is hardly subjected to direct impact force, and the risk that the labyrinth sleeve 17 is damaged by scouring is reduced. The inner sleeve and outer sleeve joint pin 19 is arranged in the connection of the labyrinth sleeve 17 and the stuffing box 2 to prevent the labyrinth sleeve 17 from rotating in the stuffing box 2 under the action of high-speed fluid unbalance force, and the inner sleeve positioning pin 21, the sleeve pressing plate 18 and the inner sleeve pressing screw 20 ensure the safety of the up-and-down movement of the large valve core 3 in the labyrinth sleeve 17, so that on one hand, noise is reduced, on the other hand, the use safety is ensured, the long-time safe operation on site is ensured, and the service life of the valve is prolonged.
As shown in fig. 3, the end of the valve seat 5 is provided with a stepped portion extending inward, and the valve seat bottom plate 501 moves in the axial direction of the valve seat 5 until both ends of the valve seat bottom plate 501 come into contact with the stepped portion at the time of installation. The flange 502 is formed along the outer ring of the valve seat 5 along the circumferential direction, the lower surface of the flange 502 is abutted against the step inside the valve body 1, the valve seat self-sealing ring 6 is also arranged in the flange 502 at the abutting position of the lower surface of the flange 502 and the step inside the valve body 1, as shown in fig. 4, the upper inclined surface 601 inclining downwards is arranged on the upper part of the valve seat self-sealing ring 6 along the circumferential direction, the lower inclined surface 602 inclining upwards is arranged on the lower part of the valve seat self-sealing ring 6 along the circumferential direction, the inclined directions of the upper inclined surface 601 and the lower inclined surface 602 are opposite, the valve seat self-sealing ring 6 is made of metal materials (such as stainless steel materials), the micro deformation and sealing effect are realized by utilizing the upper inclined surface 601 and the lower inclined surface 602 of the valve seat self-sealing ring 6, and the diameter difference between the sealing surface of the large valve core 3 and the sealing surface of the valve seat self-sealing ring 6 forms the self-sealing area. When the valve is closed, huge medium pressure is pressed on the upper part of the valve seat 5, so that the valve seat self-sealing ring 6 is pressed, and the effect that the sealing effect is better as the medium pressure is higher is achieved. The self-sealing effect is realized by utilizing the pressure of the medium, the use risk that the winding gasket needs larger pretightening specific pressure and graphite creep is easy to generate at high temperature in the past is avoided, and the sealing between the valve seat 5 and the valve body 1 is fundamentally realized. The upper surface of the flange 502 in the valve seat 5 is also provided with a valve seat quarter ring 7, the valve seat quarter ring 7 is at least in an arc-shaped structure with four equal parts, the upper surface of the flange 502 of the valve seat 5 is provided with an annular groove 503 along the circumferential direction, the surface of the valve seat quarter ring 7 is provided with a disc spring pressing sleeve 9, one end of an inner hexagonal socket head cap screw 10 penetrates through the disc spring pressing sleeve 9, the valve seat quarter ring 7 and is abutted with the bottom surface of the annular groove 503, and an anti-loosening disc spring 8 is sleeved in the disc spring pressing sleeve 9 and at the periphery of the inner hexagonal socket head cap screw 10. The locking disc spring 8 on the upper part of the valve seat 5 generates the function of pre-tightening specific pressure.
As shown in fig. 6, the disc spring pressing sleeve 9 has a rectangular block structure, a screw mounting hole 901 for matching with the hexagon socket head cap screw 10 is vertically formed in the center of the disc spring pressing sleeve 9, a pressing plate opening 902 for matching with the screw pressing plate 11 is also transversely formed on one side of the disc spring pressing sleeve 9, the pressing plate opening 902 is a rectangular hole, the pressing plate opening 902 is along two opposite side surfaces penetrating through the disc spring pressing sleeve 9, and a pair of protruding blocks 903 for matching with the annular groove 503 are also formed in an extending mode at the lower portion of the disc spring pressing sleeve 9. A screw pressing plate 11 is further arranged in the disc spring pressing sleeve 9, and a set screw 12 penetrates through the screw pressing plate 11 and presses the countersunk end of the hexagon socket head cap screw 10, so that the hexagon socket head cap screw 10 is prevented from loosening. The hexagon socket head cap screw 10 directly gets into the ring channel 503 of disk seat 5 up end through disk seat tetrad ring 7, makes disk seat tetrad ring 7 can not radially remove, and the lug 903 of disk spring cover 9 lower part cooperates with the ring channel 503 of disk seat 5, prevents that disk spring cover 9 from rotating and producing not hard up, and screw clamp plate 11 gets into and screw set screw 12 from disk spring cover 9's clamp plate trompil 902 to hexagon socket head cap screw 10 has been compressed tightly, makes hexagon socket head cap screw 10 unable withdraw from, has stopped disk seat 5 loose's possibility, has ensured the safe use of disk seat 5.
As shown in fig. 1, in the valve cover 15 of the present invention, the valve cover is fixedly connected to one end of the valve body 1 through the valve cover full-thread stud 29 and the valve cover hexagonal nut 30, the lifting nut transition plate 14 and the lifting nut 13 are further assembled on the surface of the valve cover 15 in sequence from bottom to top, and the lifting nut 13 compresses the lifting nut transition plate 14 on the surface of the valve cover 15 through the hexagonal head bolt 31 and the hexagonal nut 32. The end of the valve cover 15 extending into the valve body 1 is also abutted with a stuffing box quarter ring 16 assembled in the valve body 1, and the bottom of the stuffing box quarter ring 16 is abutted with the outer ring of the stuffing box 2 in the valve body 1 through a sealing ring pressing plate 24 and a valve cover self-sealing ring 25. A packing pressing sleeve 35 is further arranged at one end of the mandrel 4 extending out of the packing box 2 and along the periphery of the mandrel 4, one end of the packing pressing sleeve 35 extends into the packing box 2, and a packing 34 and a packing pad 33 are further arranged at the matching position of the outer diameter of the mandrel 4 and the inner diameter of the packing box 2 in sequence at the outer ring of the mandrel 4; the end of the packing gland 35 extending out of the packing box 2 is also abutted against the packing gland 36, a disc spring limiting sleeve 40 with a second disc spring 39 is arranged on the packing gland 36, one end of a packing full-thread stud 37 penetrates through the disc spring limiting sleeve 40, the second disc spring 39 and the packing gland 36 and then is connected with the end of the packing box 2, and one end of the packing full-thread stud 37 is locked through a packing hexagonal nut 38. The surface of the large valve core 3 is also fixed with a travel nut 27 through an anti-loose joint screw 28, a plurality of valve core guide rings 26 are also assembled along the periphery of the large valve core 3, a disc spring spacer 22 for contacting the mandrel 4 is also arranged in the large valve core 3, and a first disc spring 23 which is abutted with the disc spring spacer 22 is also arranged in the large valve core 3 at the lower part of the disc spring spacer 22.
As shown in FIG. 5, the labyrinth sleeve 17 is brazed after the stacked assembly of the chip sets, and the nickel-based brazing powder is arranged between the adjacent chips to bear ultrahigh-temperature medium, so that the bonding strength between the chips is high at high temperature. On the one hand, the labyrinth sleeve 17 reduces the flow speed and noise, and on the other hand, the chip set and the high bonding strength ensure the safe use and operation under the working condition of high temperature and high pressure on site.
As shown in fig. 1, the high-temperature and high-pressure medium enters the valve seat 5 through the multiple holes at the lower part of the large valve core 3, and then flows out through the diversion holes of the valve seat bottom plate 501, so that the scouring and the pressure vacuum of the valve seat bottom plate 501 are effectively avoided, the high-speed medium flowing out of the large valve core 3 is quickly shunted to the outer side of the valve seat, and then enters the downstream expanded pipeline, and the flow speed and the noise are reduced. As shown in fig. 1 and 4, the middle part of the valve seat 5 is matched with the valve body 1, the outer ring of the valve seat 5 is provided with a guide part, and a middle empty structure is arranged between adjacent guide parts, so that the thermal expansion of the outer diameter of the valve seat is released, and the thermal expansion clamping of the outer circle of the lower part of the large valve core 3 and the inner diameter of the valve seat is avoided. The above-mentioned valve seat bottom plate 501 utilizes the step portion welding of disk seat 5, even the welding seam fails, disk seat bottom plate 501 is difficult for taking off power disk seat 5, and it has not only reduced the cost, has guaranteed the safe operation of disk seat 5 moreover.
The above description is illustrative of the invention and not limiting, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure of the invention.
Claims (10)
1. The ultrahigh temperature high pressure steam vent valve is characterized in that: the labyrinth type packing box comprises a valve body (1), a packing box (2) is arranged in the valve body (1), and a labyrinth sleeve (17) is assembled in the packing box (2) through a fastener, so that a labyrinth flow channel opening of the labyrinth sleeve (17) is communicated with a strip flow channel groove of the packing box (2); the inner ring of one end of the labyrinth sleeve (17) extending out of the stuffing box (2) in the valve body (1) is also in butt joint with one end of the valve seat (5), and the other end of the valve seat (5) is connected with a valve seat bottom plate (501) provided with a diversion hole; the outer diameter of one end of the large valve core (3) is matched with the inner diameter of the stuffing box (2), and the other end of the large valve core (3) stretches into the valve seat (5) and is abutted against the inner diameter of the valve seat (5); one end of the mandrel (4) penetrates through the stuffing box (2) and the valve cover (15) and stretches into the large valve core (3).
2. The ultra-high temperature and high pressure steam vent valve of claim 1, wherein: a flange (502) is formed along the outer ring of the valve seat (5) in a extending way along the circumferential direction, the lower surface of the flange (502) is abutted against a step in the valve body (1), and a valve seat self-sealing ring (6) is further arranged in the flange (502) at the abutting position of the lower surface of the flange (502) and the step in the valve body (1); the valve seat is characterized in that a valve seat quarter ring (7) is further arranged on the upper surface of a flange of the valve seat (5), an annular groove (503) is formed in the upper surface of a flange (502) of the valve seat (5) along the circumferential direction, a disc spring pressing sleeve (9) is arranged on the surface of the valve seat quarter ring (7), one end of an inner hexagonal cylindrical head screw (10) penetrates through the disc spring pressing sleeve (9), the valve seat quarter ring (7) and is abutted to the bottom surface of the annular groove (503), a locking disc spring (8) is further sleeved on the periphery of the inner hexagonal cylindrical head screw (10) in the disc spring pressing sleeve (9), and a screw pressing plate (11) is further arranged in the disc spring pressing sleeve (9), and a set screw (12) penetrates through the screw pressing plate (11) and presses the countersunk end of the inner hexagonal cylindrical head screw (10).
3. The ultra-high temperature and high pressure steam vent valve of claim 2, wherein: the disc spring pressing sleeve (9) is of a rectangular block structure, a screw mounting hole (901) for being matched with an inner hexagonal cylindrical head screw (10) is formed in the center of the disc spring pressing sleeve (9) in the vertical direction, a pressing plate opening (902) for being assembled with a screw pressing plate (11) is formed in one side of the disc spring pressing sleeve (9) in the transverse direction, the pressing plate opening (902) penetrates through two opposite side surfaces of the disc spring pressing sleeve (9) in the transverse direction, and a pair of protruding blocks (903) for being matched with the annular grooves (503) are formed in the lower portion of the disc spring pressing sleeve (9) in an extending mode.
4. The ultra-high temperature and high pressure steam vent valve of claim 1, wherein: one end of the labyrinth sleeve (17) is arranged on a step of the inner diameter of the stuffing box (2), when the labyrinth sleeve (17) is assembled with the stuffing box (2), an inner sleeve positioning pin (21) and an outer sleeve joint pin (19) for preventing the labyrinth sleeve (17) from rotating inside the stuffing box (2) are respectively arranged at the matched position of the outer diameter of the labyrinth sleeve (17) and the inner diameter of the stuffing box (2), the outer ring of the labyrinth sleeve (17) extending out of one end of the stuffing box (2) is tightly pressed through a sleeve pressing plate (18), and the contact surface of the sleeve pressing plate (18) and the stuffing box (2) is fixedly connected through an inner sleeve pressing screw (20) after being welded.
5. The ultra-high temperature and high pressure steam vent valve of claim 4, wherein: the locating pin (21) is arranged at the upper half part of the matching part of the outer diameter of the labyrinth sleeve (17) and the inner diameter of the sleeve pressing plate (18).
6. The ultra-high temperature and high pressure steam vent valve of claim 1, wherein: an inwardly extending step portion is provided at an end portion of the valve seat (5), and the valve seat bottom plate (501) is moved in an axial direction of the valve seat (5) until both ends of the valve seat bottom plate (501) come into contact with the step portion at the time of installation.
7. The ultra-high temperature and high pressure steam vent valve of claim 1, wherein: the valve cover (15) is fixedly connected to one end of the valve body (1) through a valve cover full-thread stud (29) and a valve cover hexagonal nut (30), a lifting nut transition plate (14) and a lifting nut (13) are further assembled on the surface of the valve cover (15) sequentially from bottom to top, and the lifting nut (13) tightly presses the lifting nut transition plate (14) on the surface of the valve cover (15) through a hexagonal head bolt (31) and a hexagonal nut (32).
8. The ultra-high temperature and high pressure steam vent valve of claim 1, wherein: a packing pressing sleeve (35) is further arranged at one end of the mandrel (4) extending out of the packing box (2) and along the periphery of the mandrel (4), one end of the packing pressing sleeve (35) extends into the packing box (2), and a packing (34) and a packing pad (33) are further arranged at the matching position of the outer diameter of the mandrel (4) and the inner diameter of the packing box (2) and in sequence at the outer ring of the mandrel (4); one end of the packing pressing sleeve (35) extending out of the packing box (2) is further abutted against the packing pressing cover (36), a disc spring limiting sleeve (40) with a second disc spring (39) is arranged on the packing pressing cover (36), one end of the packing full-thread stud (37) penetrates through the disc spring limiting sleeve (40), the second disc spring (39) and the packing pressing cover (36) and then is connected with the end of the packing box (2), and one end of the packing full-thread stud (37) is locked through a packing hexagonal nut (38).
9. The ultra-high temperature and high pressure steam vent valve of claim 1, wherein: the surface of the large valve core (3) is also provided with a travel nut (27) through an anti-loosening joint screw (28), a plurality of valve core guide rings (26) are further assembled along the periphery of the large valve core (3), a disc spring spacer (22) used for contacting a mandrel (4) is further arranged in the large valve core (3), and a first disc spring (23) which is in butt joint with the disc spring spacer (22) is further arranged at the lower part of the disc spring spacer (22) in the large valve core (3).
10. The ultra-high temperature and high pressure steam vent valve of claim 1, wherein: the valve seat is provided with an upper inclined surface (601) which is inclined downwards along the circumferential direction from the upper part of the sealing ring (6), the valve seat is provided with a lower inclined surface (602) which is inclined upwards along the circumferential direction from the lower part of the sealing ring (6), the inclined directions of the upper inclined surface (601) and the lower inclined surface (602) are opposite, and the valve seat is made of a metal material from the sealing ring (6).
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| CN201710696831.0A CN107314152B (en) | 2017-08-15 | 2017-08-15 | Ultrahigh-temperature high-pressure steam vent valve |
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| CN201710696831.0A CN107314152B (en) | 2017-08-15 | 2017-08-15 | Ultrahigh-temperature high-pressure steam vent valve |
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| CN107314152B true CN107314152B (en) | 2023-07-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167461A (en) * | 2018-01-31 | 2018-06-15 | 黑龙江北方阀业有限责任公司 | It is a kind of to idle discharge steam valve |
| CN108150655A (en) * | 2018-02-12 | 2018-06-12 | 无锡智能自控工程股份有限公司 | Pressure Steam Valve seat fixing structure |
| CN109114236B (en) * | 2018-09-19 | 2020-02-07 | 南通国电电站阀门股份有限公司 | Nuclear power island core reheat steam main flow control valve |
| CN109780314A (en) * | 2019-03-21 | 2019-05-21 | 无锡智能自控工程股份有限公司 | A kind of suspension type labyrinth tube-in-tube structure |
| CN112984207A (en) * | 2021-04-09 | 2021-06-18 | 艾肯（江苏）工业技术有限公司 | Pressure reducing valve |
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| US5012841A (en) * | 1989-08-24 | 1991-05-07 | Keystone International Holdings Corp. | Pressure reducing and conditioning valves |
| JPH04252808A (en) * | 1991-01-24 | 1992-09-08 | Nippon Beeles- Kk | Control valve for reducing temperature and pressure |
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| CN107314152A (en) | 2017-11-03 |
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