CN114645953A - Anti-freezing and anti-blocking molten salt gate valve with inclined flow channel - Google Patents
Anti-freezing and anti-blocking molten salt gate valve with inclined flow channel Download PDFInfo
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- CN114645953A CN114645953A CN202210280137.1A CN202210280137A CN114645953A CN 114645953 A CN114645953 A CN 114645953A CN 202210280137 A CN202210280137 A CN 202210280137A CN 114645953 A CN114645953 A CN 114645953A
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- freezing
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- 150000003839 salts Chemical class 0.000 title claims abstract description 34
- 238000007710 freezing Methods 0.000 title claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 62
- 238000012856 packing Methods 0.000 claims description 43
- 238000010438 heat treatment Methods 0.000 claims description 39
- 210000000078 claw Anatomy 0.000 claims description 17
- 238000004321 preservation Methods 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 210000004907 gland Anatomy 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 4
- 239000011490 mineral wool Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 230000008014 freezing Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 13
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 208000001034 Frostbite Diseases 0.000 description 4
- 238000005338 heat storage Methods 0.000 description 3
- 206010053615 Thermal burn Diseases 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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Classifications
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/12—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with wedge-shaped arrangements of sealing faces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
- B08B17/02—Preventing deposition of fouling or of dust
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
-
- 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
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
- F16K27/047—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members with wedge-shaped obturating members
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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
-
- 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
-
- 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
- F16K49/00—Means in or on valves for heating or cooling
- F16K49/002—Electric heating means
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/161—Housings for valves, tee pieces, or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses an inclined flow channel anti-freezing and anti-blocking fused salt gate valve which comprises a valve body, a valve rod, a valve cover and a gate plate, wherein a first flow channel and a second flow channel which extend inwards are respectively arranged at two ends of the valve body; the bottom of the first flow channel is provided with a first slope, the height of the first slope is gradually reduced in the direction away from the overflowing cavity, the bottom of the second flow channel is provided with a second slope, the height of the second slope is gradually reduced in the direction away from the overflowing cavity, and the first slope is provided with a return channel for communicating the cavity with the first flow channel. The valve has the function of preventing freezing and blocking, so that the gate and the valve seat can be effectively matched and sealed, and the condition of internal leakage of the valve is avoided.
Description
Technical Field
The invention relates to the technical field of valve structures, in particular to an inclined flow passage anti-freezing and anti-blocking molten salt gate valve.
Background
The solar-thermal power generation molten salt technology directly adopts a novel groove type technology of molten salt as a heat absorption, heat transfer and heat storage working medium, is different from the traditional heat transfer oil heat transfer and molten salt heat storage, and adopts binary molten salt as a heat storage medium in the routes of a tower type technology, a disc type technology and a Fresnel type solar-thermal power generation technology. Because the fused salt is a heat transfer and storage medium with low cost, long service life, good heat transfer and storage performance, high temperature, high heat flux and low operating pressure, the fused salt is used as the heat transfer and storage working medium for photo-thermal power generation, the thermal efficiency of a photo-thermal power generation system, the reliability and the economy of the system can be obviously improved, and the photo-thermal power generation station is helped to realize continuous and stable operation and is widely accepted.
The molten salt valve commonly used at present generally comprises a valve body, a valve rod, a valve cover and a flashboard, wherein a first runner and a second runner which extend inwards are respectively arranged at two ends of the valve body, a overflowing cavity is arranged between the first runner and the second runner, the valve cover is arranged at the upper end of a valve neck of the valve body, the valve rod penetrates through the valve cover and extends into the overflowing cavity to be in linkage connection with the flashboard, and valve seats which are used for forming sealing fit with the flashboard are respectively arranged at positions on two sides of the flashboard in the overflowing cavity. The position that the valve body inner wall is located the flashboard below has usually with overflowing the cavity that the chamber is linked together to guarantee to ensure the effective stroke of flashboard, make the flashboard carry out effectual sealed cooperation with the disk seat, but nevertheless because there is the fused salt to remain in this lower concave part, cause long-pending salt solution phenomenon easily, make the valve take place to freeze stifled, thereby cause the hindrance to the motion of flashboard, make the flashboard can't reach lower extreme position, lead to the flashboard can't form effectual sealed cooperation and produce the valve internal leakage with the disk seat.
Therefore, there is a need for an inclined flow channel anti-freezing and anti-blocking molten salt gate valve to solve the above problems.
Disclosure of Invention
The invention aims to provide an inclined flow passage anti-freezing and anti-blocking fused salt gate valve which has an anti-freezing and anti-blocking function, so that a gate plate and a valve seat can be effectively matched and sealed, and the condition of internal leakage of the valve is avoided.
In order to achieve the purpose, the invention provides the following technical scheme: the inclined flow channel anti-freezing and anti-blocking molten salt gate valve comprises a valve body, a valve rod, a valve cover and a gate plate, wherein a first flow channel and a second flow channel which extend inwards are respectively arranged at two ends of the valve body, a flow passing cavity is arranged between the first flow channel and the second flow channel, the valve cover is arranged at the upper end of a valve neck of the valve body, the valve rod penetrates through the valve cover and extends into the flow passing cavity to be in linkage connection with the gate plate, valve seats which are used for forming sealing fit with the gate plate are respectively arranged at positions on two sides of the gate plate in the flow passing cavity, and a concave cavity communicated with the flow passing cavity is arranged at a position, below the gate plate, of the inner wall of the valve body; the bottom of the first flow channel is provided with a first slope, the height of the first slope is gradually reduced in the direction far away from the overflowing cavity, the bottom of the second flow channel is provided with a second slope, the height of the second slope is gradually reduced in the direction far away from the overflowing cavity, and the first slope is provided with a return channel used for communicating the cavity with the first flow channel.
Through adopting the above technical scheme, when the valve is closed, during the fused salt in the cavity can flow to first runner through return channel, produce long-pending salt liquid phenomenon in avoiding the cavity, cause freezing stifled of valve, and first slope and second slope have on first runner and the second runner, can play the effect of water conservancy diversion, avoid the fused salt to pile up in the flashboard both sides, the stifled effect of preventing frostbite of valve has further been promoted, it can effectively cooperate sealedly to have guaranteed flashboard and disk seat, avoid the condition of leaking to take place in the valve.
The valve is characterized by further comprising an elliptical metal pad, the valve cover is connected with the valve neck through bolts, a first V-shaped sealing groove which is closed in loop is formed in the lower end face of the valve cover, a second V-shaped sealing groove which is closed in loop is formed in the upper end face of the valve neck, the upper portion of the elliptical metal pad is embedded in the first V-shaped sealing groove, and the lower portion of the elliptical metal pad is embedded in the second V-shaped sealing groove.
Through adopting above-mentioned technical scheme, can promote the leakproofness between valve gap and the valve neck, avoid the inside medium of valve to leak from the clearance between the two.
The invention is further set that a hollow bracket is arranged at the upper end of the valve cover through a bolt, an electric device is arranged at the upper end of the bracket, and the output end of the electric device is in linkage connection with the upper end of the valve rod.
Through adopting above-mentioned technical scheme, utilize electric actuator operation valve rod to carry out opening and close of valve, it is very light convenient to operate.
The invention further provides a sealing assembly which comprises a packing pad, a first sealing packing, a packing spacer ring, a second sealing packing, a packing pressing sleeve and a packing pressing plate, wherein a sealing cavity coaxial with the valve rod is arranged in the middle of the valve cover, the first sealing packing, the sealing spacer ring, the second sealing packing and the packing pad are sequentially arranged in the sealing cavity from top to bottom, and the packing pressing plate is connected with the support through a slipknot bolt and presses the packing pressing sleeve on the upper end of the first sealing packing.
Through adopting above-mentioned technical scheme, can promote the leakproofness between valve rod and the valve gap to avoid inside medium to leak from the clearance between the two.
The invention is further arranged in that the sealing assembly further comprises a tubular upper sealing seat, a limiting step is arranged in the valve cover, the upper sealing seat is sleeved between the valve rod and the limiting step and is in interference fit with the limiting step, a limiting flange extending peripherally is further arranged at the lower end of the upper sealing seat, and the limiting flange abuts against the lower end face of the limiting step.
Through adopting above-mentioned technical scheme, go up the effect that the seal receptacle not only can play the direction, can further promote the leakproofness between valve rod and the valve gap moreover to effectively avoid inside medium to leak from the clearance between the two.
The invention is further provided that the side part of the bracket is provided with an observation port, and the observation port is provided with a dustproof glass window.
Through adopting above-mentioned technical scheme, can avoid the dust to enter into seal assembly in, influence seal assembly's sealed effect.
The preheating valve is further provided with a heating assembly, a preheating cavity is arranged at a position, between the upper sealing seat and the sealing cavity, on the inner side of the valve cover, the heating assembly is arranged at a position, on the valve cover, at the periphery of the sealing cavity, and the heating assembly comprises a heating wire which is wound on the periphery of the valve cover.
By adopting the technical scheme, the heating wire is utilized to supplement heat for the valve cover, the phenomenon that the temperature of the valve cover part is low to crystallize the molten salt in the valve cover part is avoided, and the anti-freezing and anti-blocking effect is achieved.
The invention is further arranged that the heating component also comprises an annular pressing seat, two positioning rings and a plurality of compression screws, the periphery of the valve cover is provided with an annular mounting groove, the annular mounting groove is provided with a spiral positioning groove for embedding a heating wire, the two positioning rings are sleeved on the annular mounting groove to form a cylindrical structure, the two positioning rings press and fix the heating wire in the spiral positioning groove, the two positioning rings are respectively provided with a wire passing hole for the heating wire to pass through, the two wire passing holes are respectively communicated with the head end and the tail end of the spiral positioning groove, the annular pressing seat is sleeved on the periphery of the valve cover, the valve cover is in threaded connection with a connecting flange, the upper end of the connecting flange is provided with a plurality of screw holes with the number equivalent to that of the compression screws along the circumferential direction, the compression screws are screwed into the corresponding screw holes, and the upper end of the screw holes is provided with accommodating grooves for the screw heads of the compression screws to be embedded in, the lower end of the compression screw abuts against the annular pressing seat to compress the annular pressing seat on the upper portions of the two positioning rings, an annular positioning flange is arranged on the edge of the lower end of the annular pressing seat, and the annular positioning flange abuts against the peripheries of the two positioning rings.
Through adopting above-mentioned technical scheme, can realize the location installation of heater, promote the stability of heater installation, simultaneously, the spiral mounting structure of heater can guarantee that the valve gap position is by even heating, further promotes stifled effect of preventing frostbite.
The invention is further arranged that the position of the positioning ring corresponding to the outer end of the wire passing hole is provided with a locking joint for fixing the heating wire, the outer end of the wire passing hole is provided with a thread groove, the thread groove is connected with an external thread sleeve pipe for the heating wire to pass through, and a buffer pad is clamped between the inner end of the external thread sleeve and the inner end of the thread groove, the locking joint comprises a joint main body, the joint main body is connected on the external thread sleeve in a threaded manner, the outer end of the joint main body is provided with a plurality of locking claws along the circumferential direction, the inner side of the locking claw is provided with an arc-shaped convex part for tightly abutting against the heating wire at a position close to the outer end, a guide convex part with an isosceles trapezoid-shaped section is arranged at a position close to the outer end at the outer side of the locking claw, the periphery of the locking claws is in threaded connection with adjusting nuts, and a conical guide inclined plane is arranged at one end, close to the guide convex part, of the adjusting nut.
Through adopting above-mentioned technical scheme, after screwing the regulation nut, a plurality of locking claws on the locking joint can produce the deformation towards the heater direction for arc convex part on the locking claw supports tight heater, thereby realizes the locking to the heater at two silk hole positions, avoids it to receive the stability that the pull influences the heater installation on the spiral positioning groove, promotes the security of structure.
The positioning ring further comprises an annular main body and a gland, wherein an annular heat insulation cavity with one open end is arranged on the annular main body, the gland is arranged at one end, corresponding to the open end, of the annular main body, a clamping groove is formed in one end face, facing the gland, of the annular main body, and a clamping convex part matched with the clamping groove is formed in the gland; the inside in annular heat insulation cavity is equipped with first annular baffle and second annular baffle, and first annular baffle and second annular baffle separate into first heat preservation room, heat-insulating room and second heat preservation room with annular heat insulation cavity, and it has the rock wool to fill in first heat preservation room and the second heat preservation room.
Through adopting above-mentioned technical scheme, can play thermal-insulated effect, can not only avoid the staff mistake to touch and scald, can promote heat utilization rate moreover, reduce the energy consumption.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of the portion B in FIG. 1;
FIG. 4 is a schematic structural view of the seal assembly of the present invention;
FIG. 5 is a schematic view of the heating assembly of the present invention;
FIG. 6 is a schematic view of the two positioning rings of the present invention assembled together;
fig. 7 is a schematic structural view of the locking joint of the present invention.
In the figure: 1. a valve body; 2. a valve stem; 3. a valve cover; 4. a gate plate; 5. a first flow passage; 6. a second flow passage; 7. a flow-through chamber; 8. a valve neck; 9. a valve seat; 10. a concave cavity; 11. a first slope; 12. a second slope; 13. a return channel; 14. a metal elliptical pad; 15. a first V-shaped seal groove; 16. a second V-shaped seal groove; 17. a support; 18. an electric device; 19. a seal assembly; 20. a filler pad; 21. a first seal packing; 22. a packing spacer ring; 23. a second seal packing; 24. pressing and sleeving the filler; 25. a packing press plate; 26. sealing the cavity; 27. a slipknot bolt; 28. an upper seal seat; 29. a limiting step; 30. a limiting flange; 31. a viewing port; 32. a dust-proof glass window; 33. a heating assembly; 34. a preheating chamber; 35. an annular pressing seat; 36. a positioning ring; 37. a compression screw; 38. an annular mounting groove; 39. a spiral positioning groove; 40. a wire passing hole; 41. a connecting flange; 42. a screw hole; 43. a receiving groove; 44. an annular locating flange; 45. locking the joint; 46. a thread groove; 47. an externally threaded sleeve; 48. a cushion pad; 49. a connector body; 50. a locking claw; 51. an arc-shaped convex part; 52. a guide projection; 53. adjusting the nut; 54. a tapered guide ramp; 55. an annular body; 56. a gland; 57. an annular insulating cavity; 58. a clamping groove; 59. clamping the convex part; 60. a first annular partition; 61. a second annular partition plate; 62. a first heat preservation chamber; 63. a heat insulation chamber; 64. a second insulated chamber; 65. rock wool; 66. a heating wire.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): the inclined flow channel anti-freezing and anti-blocking molten salt gate valve shown in the attached figures 1-7 comprises a valve body 1, a valve rod 2, a valve cover 3 and a gate plate 4, wherein a first flow channel 5 and a second flow channel 6 which extend inwards are respectively arranged at two ends of the valve body 1, an overflowing cavity 7 is arranged between the first flow channel 5 and the second flow channel 6, the valve cover 3 is arranged at the upper end of a valve neck 8 of the valve body 1, the valve rod 2 penetrates through the valve cover 3 and extends into the overflowing cavity 7 to be in linkage connection with the gate plate 4, valve seats 9 which are used for forming sealing fit with the gate plate 4 are respectively arranged at positions on two sides of the gate plate 4 in the overflowing cavity 7, and a concave cavity 10 communicated with the overflowing cavity 7 is arranged at a position, below the gate plate 4, on the inner wall of the valve body 1; the bottom of the first flow channel 5 is provided with a first slope 11, the height of the first slope 11 is gradually reduced in the direction away from the overflowing cavity 7, the bottom of the second flow channel 6 is provided with a second slope 12, the height of the second slope 12 is gradually reduced in the direction away from the overflowing cavity 7, and the first slope 11 is provided with a return channel 13 for communicating the cavity 10 with the first flow channel 5. When the valve is closed, the fused salt in the cavity 10 can flow to the first runner 5 through return channel 13, produce long-pending salt liquid phenomenon in avoiding the cavity 10, cause freezing stifled of valve, and first runner 5 and second runner 6 are gone up and are had first slope 11 and second slope 12, can play the effect of water conservancy diversion, avoid the fused salt to pile up in flashboard 4 both sides, the stifled effect of preventing frostbite of valve has further been promoted, it can effectively cooperate sealedly to have guaranteed flashboard 4 and disk seat 9, the condition of avoiding leaking in the valve takes place.
As shown in fig. 2, the valve cover further comprises an elliptical metal pad 14, the valve cover 3 and the valve neck 8 are connected through bolts, a first V-shaped sealing groove 15 which is closed-loop is formed in the lower end face of the valve cover 3, a second V-shaped sealing groove 16 which is closed-loop is formed in the upper end face of the valve neck 8, the upper portion of the elliptical metal pad 14 is embedded in the first V-shaped sealing groove 15, and the lower portion of the elliptical metal pad 14 is embedded in the second V-shaped sealing groove 16. The design can improve the sealing performance between the valve cover 3 and the valve neck 8 and avoid the leakage of the medium in the valve from the gap between the valve cover and the valve neck.
As shown in fig. 1, a hollow bracket 17 is mounted at the upper end of the valve cover 3 through a bolt, an electric device 18 is mounted at the upper end of the bracket 17, the electric device 18 is a conventional device in the market and is driven by a motor as a source power, and the output end of the electric device 18 is in linkage connection with the upper end of the valve rod 2. The electric device 18 is utilized to operate the valve rod 2 to open and close the valve, and the operation is very easy and convenient.
As shown in fig. 1 and 4, the sealing assembly 19 further includes a sealing assembly 19, the sealing assembly 19 includes a packing pad 20, a first sealing packing 21, a packing spacer ring 22, a second sealing packing 23, a packing pressing sleeve 24 and a packing pressing plate 25, the first sealing packing 21 and the second sealing packing 23 are both made of flexible graphite, a sealing cavity 26 coaxial with the valve rod 2 is disposed in the middle of the valve cover 3, the first sealing packing 21, the packing spacer ring, the second sealing packing 23 and the packing pad 20 are sequentially disposed in the sealing cavity 26 from top to bottom, and the packing pressing plate 25 is connected with the bracket 17 through a loose joint bolt 27 and presses the packing pressing sleeve 24 on the upper end of the first sealing packing 21. This design can improve the sealability between the valve stem 2 and the bonnet 3, thereby preventing the leakage of the internal medium from the gap therebetween.
As shown in fig. 4, the sealing assembly 19 further includes a tubular upper sealing seat 28, a limiting step 29 is arranged in the valve cover 3, the upper sealing seat 28 is sleeved between the valve rod 2 and the limiting step 29, the upper sealing seat 28 is in interference fit with the limiting step 29, a limiting flange 30 extending peripherally is further arranged at the lower end of the upper sealing seat 28, and the limiting flange 30 abuts against the lower end face of the limiting step 29. The upper sealing seat 28 not only can play a guiding role, but also can further improve the sealing performance between the valve rod 2 and the valve cover 3, thereby effectively avoiding the leakage of the internal medium from the gap between the two.
As shown in fig. 4, the side of the bracket 17 is provided with an observation port 31, and a dustproof glass window 32 is installed on the observation port 31. This design can avoid the dust to enter into seal assembly 19, influences seal assembly 19's sealed effect.
As shown in fig. 5, the gate valve further comprises a heating assembly 33, a preheating chamber 34 is arranged at a position between the upper sealing seat 28 and the sealing chamber 26 on the inner side of the valve cap 3, the heating assembly 33 is arranged at a position on the valve cap 3 at the periphery of the sealing chamber 26, the heating assembly 33 comprises a heating wire 66, the heating wire 66 is a resistance wire which is conventional in the market and generates heat when being electrified, and the heating wire 66 is wound on the periphery of the valve cap 3. The heating wire 66 is used for supplementing heat to the valve cover 3, so that the phenomenon that the temperature of the valve cover 3 is low to cause the internal molten salt to crystallize is avoided, and the anti-freezing and anti-blocking effect is achieved.
As shown in fig. 5 and fig. 6, the heating assembly 33 further includes an annular pressing seat 35, two positioning rings 36 and a plurality of compression screws 37, the periphery of the valve cap 3 is provided with an annular mounting groove 38, the annular mounting groove 38 is provided with a spiral positioning groove 39 for embedding a heating wire 66, the two positioning rings 36 are sleeved on the annular mounting groove 38 to form a cylindrical structure, the two positioning rings 36 press the heating wire 66 into the spiral positioning groove 39, the two positioning rings 36 are respectively provided with a wire passing hole 40 for the heating wire 66 to pass through, the two wire passing holes 40 are respectively communicated with the head end and the tail end of the spiral positioning groove 39, the annular pressing seat 35 is sleeved on the periphery of the valve cap 3, the valve cap 3 is threadedly connected with a connecting flange 41, that is, an external thread portion is provided on the outer wall of the valve stem 2, an internal thread portion matched with the external thread portion is provided on the inner wall of the connecting flange 41, the internal diameter of connecting flange 41 is the same with the internal diameter that the seat 35 was pressed to the annular, connecting flange 41 upper end is provided with the screw 42 that a plurality of quantity and housing screw 37 are equivalent along circumference, housing screw 37 screw in the corresponding screw 42, the upper end of screw 42 is equipped with the groove 43 that accomodates that supplies housing screw 37's screw head embedding, the lower extreme of housing screw 37 supports and compresses tightly annular pressure seat 35 on two holding rings 36 upper portions, annular pressure seat 35 lower extreme edge is equipped with annular location flange 44, annular location flange 44 supports the periphery at two holding rings 36. The location installation of heater 66 can be realized to this design, promotes the stability of heater 66 installation, and simultaneously, the spiral mounting structure of heater 66 can guarantee that valve gap 3 position is by even heating, further promotes stifled effect of preventing frostbite.
As shown in fig. 5 and 7, a locking joint 45 for fixing the heating wire 66 is installed at a position of the positioning ring 36 corresponding to the outer end of the wire passing hole 40, a thread groove 46 is formed at the outer end of the wire passing hole 40, an external thread sleeve 47 for the heating wire 66 to pass through is connected to the thread groove 46 in a threaded manner, a buffer 48 is clamped between the inner end of the external thread sleeve 47 and the inner end of the thread groove 46, the locking joint 45 includes a joint main body 49, the joint main body 49 is connected to the external thread sleeve 47 in a threaded manner, a plurality of locking claws 50 are arranged at the outer end of the joint main body 49 along the circumferential direction, an arc-shaped convex portion 51 for tightly abutting against the heating wire 66 is arranged at a position close to the outer end on the inner side of the locking claw 50, a guide convex portion 52 with an isosceles trapezoid-shaped cross section is arranged at a position close to the outer end on the outer side of the locking claw 50, and an adjusting nut 53 is connected to the outer periphery of the plurality of the locking claws 50 in a threaded manner, the adjusting nut 53 is provided with a conical guiding inclined surface 54 at one end close to the guiding convex part 52. After screwing the adjusting nut 53, the plurality of locking claws 50 on the locking joint 45 can generate deformation towards the direction of the heating wire 66, so that the arc-shaped convex parts 51 on the locking claws 50 tightly support the heating wire 66, the locking of the heating wire 66 at the two wire passing holes 40 is realized, the stability of the installation of the heating wire 66 on the spiral positioning groove 39 is prevented from being influenced by drawing, and the safety of the structure is improved.
As shown in fig. 5, the positioning rings 36 include an annular main body 55 and a pressing cover 56, an annular heat insulation cavity 57 with an opening at one end is provided on the annular main body 55, one of the positioning rings 36 has an upward opening at one end, the other one of the positioning rings 36 has a downward opening at the other end, the pressing cover 56 is provided on the annular main body 55 at the end corresponding to the opening, a clamping groove 58 is provided on one end surface of the annular main body 55 facing the pressing cover 56, and a clamping convex portion 59 engaged with the clamping groove 58 is provided on the pressing cover 56; the first annular partition plate 60 and the second annular partition plate 61 are arranged in the annular heat insulation cavity 57, the first annular partition plate 60 and the second annular partition plate 61 divide the annular heat insulation cavity 57 into a first heat preservation chamber 62, a heat insulation chamber 63 and a second heat preservation chamber 64, and rock wool 65 is filled in the first heat preservation chamber 62 and the second heat preservation chamber 64. This design can play thermal-insulated effect, can not only avoid the staff mistake touching and scald, can promote heat utilization rate moreover, reduces the energy consumption.
Claims (10)
1. The inclined flow channel anti-freezing and anti-blocking molten salt gate valve comprises a valve body (1), a valve rod (2), a valve cover (3) and a gate plate (4), wherein a first flow channel (5) and a second flow channel (6) which extend inwards are respectively arranged at two ends of the valve body (1), a flow through cavity (7) is arranged between the first flow channel (5) and the second flow channel (6), the valve cover (3) is arranged at the upper end of a valve neck (8) of the valve body (1), the valve rod (2) penetrates through the valve cover (3) and extends into the flow through cavity (7) to be in linkage connection with the gate plate (4), valve seats (9) which are used for forming sealing fit with the gate plate (4) are respectively arranged at positions on two sides of the gate plate (4) in the flow through cavity (7), and a concave cavity (10) communicated with the flow through cavity (7) is arranged at a position, which is located below the gate plate (4), on the inner wall of the valve body (1); the method is characterized in that: the improved structure of the water-cooled water heater is characterized in that a first slope (11) is arranged at the bottom of the first flow channel (5), the height of the first slope (11) is gradually reduced in the direction away from the overflowing cavity (7), a second slope (12) is arranged at the bottom of the second flow channel (6), the height of the second slope (12) is gradually reduced in the direction away from the overflowing cavity (7), and a backflow channel (13) used for communicating the cavity (10) with the first flow channel (5) is formed in the first slope (11).
2. The inclined runner anti-freezing and anti-blocking molten salt gate valve according to claim 1, is characterized in that: still include oval pad of metal (14), be connected through the bolt between valve gap (3) and the valve neck (8), the lower terminal surface of valve gap (3) is equipped with first V-arrangement seal groove (15) that are the closed loop, the up end of valve neck (8) is equipped with second V-arrangement seal groove (16) that are the closed loop, the upper portion of oval pad of metal (14) inlays and establishes in first V-arrangement seal groove (15), the lower part of oval pad of metal (14) inlays and establishes in second V-arrangement seal groove (16).
3. The inclined runner anti-freezing and anti-blocking molten salt gate valve according to claim 1, is characterized in that: valve gap (3) upper end is installed through the bolt and is hollow support (17), electric actuator (18) are installed to the upper end of support (17), the output of electric actuator (18) is connected with the upper end linkage of valve rod (2).
4. The inclined runner anti-freezing and anti-blocking molten salt gate valve according to claim 3, wherein: the valve cover is characterized by further comprising a sealing assembly (19), the sealing assembly (19) comprises a packing pad (20), a first sealing packing (21), a packing spacer ring (22), a second sealing packing (23), a packing pressing sleeve (24) and a packing pressing plate (25), a sealing cavity (26) coaxial with the valve rod (2) is arranged in the middle of the valve cover (3), the first sealing packing (21), the sealing spacer ring, the second sealing packing (23) and the packing pad (20) are sequentially arranged in the sealing cavity (26) from top to bottom, and the packing pressing plate (25) is connected with the support (17) through a slipknot bolt (27) and presses the packing pressing sleeve (24) at the upper end of the first sealing packing (21).
5. The inclined runner anti-freezing and anti-blocking molten salt gate valve according to claim 4, characterized in that: seal assembly (19) is still including being pipy last seal receptacle (28), be equipped with spacing step (29) in valve gap (3), go up seal receptacle (28) cover establish valve rod (2) with between spacing step (29), and go up seal receptacle (28) and spacing step (29) interference fit, the lower extreme of going up seal receptacle (28) still is equipped with spacing flange (30) that the periphery extends, spacing flange (30) support on the lower terminal surface of spacing step (29).
6. The inclined runner anti-freezing and anti-blocking molten salt gate valve according to claim 3, wherein: the side of the bracket (17) is provided with an observation port (31), and a dustproof glass window (32) is arranged on the observation port (31).
7. The inclined runner anti-freezing and anti-blocking molten salt gate valve according to claim 5, wherein: still include heating element (33), the position that valve gap (3) inboard is located between last seal receptacle (28) and sealed chamber (26) is equipped with preheating chamber (34), heating element (33) set up the position that is located sealed chamber (26) periphery on valve gap (3), heating element (33) include heater (66), heater (66) winding is in the periphery of valve gap (3).
8. The inclined runner anti-freezing molten salt blocking gate valve according to claim 7, characterized in that: heating element (33) still includes annular pressure seat (35), two holding rings (36) and a plurality of housing screw (37), the periphery of valve gap (3) is equipped with annular mounting groove (38), be equipped with spiral positioning groove (39) that are used for inlaying and establish heater (66) on annular mounting groove (38), two holding rings (36) cover is established and is formed a drum structure on annular mounting groove (38), two holding rings (36) press heater (66) admittedly in spiral positioning groove (39), are equipped with one respectively on two holding rings (36) and supply wire passing hole (40) that heater (66) passed, two wire passing hole (40) respectively with the head end and the end of spiral positioning groove (39) are linked together, annular pressure seat (35) cover is established in valve gap (3) periphery, threaded connection has connecting flange (41) on valve gap (3), connect flange (41) upper end and be provided with screw (42) that a plurality of quantity and housing screw (37) are equivalent along circumference, in screw (42) that housing screw (37) screw in corresponds, the upper end of screw (42) is equipped with the screw head embedding that supplies housing screw (37) and accomodates groove (43), the lower extreme of housing screw (37) supports presses seat (35) to compress tightly annular on annular pressure seat (35) on two holding rings (36) upper portion, the annular is pressed seat (35) lower extreme edge and is equipped with annular locating flange (44), annular locating flange (44) support the periphery at two holding rings (36).
9. The inclined runner anti-freezing and anti-blocking molten salt gate valve according to claim 8, is characterized in that: the position that holding ring (36) corresponds wire hole (40) outer end is installed and is used for the locking joint (45) of fixed heater (66), the outer end of crossing wire hole (40) is equipped with thread groove (46), threaded connection has external screw thread sleeve pipe (47) that supplies heater (66) to pass on thread groove (46) to press from both sides between external screw thread sleeve pipe (47) inner and thread groove (46) inner and be equipped with blotter (48), locking joint (45) are including connecting main part (49), connect main part (49) threaded connection on external screw thread sleeve pipe (47), the outer end of connecting main part (49) is provided with a plurality of locking claws (50) along circumference, the position that is close to the outer end in locking claw (50) inboard is equipped with arc convex part (51) that are used for supporting heater (66), the position that is close to the outer end in locking claw (50) outside is equipped with the cross-section and is isosceles trapezoid shape's direction convex part (52), the periphery of the locking claws (50) is connected with an adjusting nut (53) in a threaded manner, and one end, close to the guide convex part (52), of the adjusting nut (53) is provided with a conical guide inclined surface (54).
10. The inclined runner anti-freezing and anti-blocking molten salt gate valve according to claim 8, is characterized in that: the positioning ring (36) comprises an annular main body (55) and a gland (56), an annular heat insulation cavity (57) with one open end is arranged on the annular main body (55), the gland (56) is arranged at one end, corresponding to the open end, of the annular main body (55), a clamping groove (58) is formed in one end face, facing the gland (56), of the annular main body (55), and a clamping convex part (59) matched with the clamping groove (58) is arranged on the gland (56); the inside in annular heat insulation chamber (57) is equipped with first annular baffle (60) and second annular baffle (61), and first annular baffle (60) and second annular baffle (61) separate into first heat preservation room (62), heat insulation room (63) and second heat preservation room (64) with annular heat insulation chamber (57), and rock wool (65) have been filled in first heat preservation room (62) and second heat preservation room (64).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210280137.1A CN114645953B (en) | 2022-03-21 | 2022-03-21 | Oblique runner anti-freezing and blocking fused salt gate valve |
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| CN202210280137.1A CN114645953B (en) | 2022-03-21 | 2022-03-21 | Oblique runner anti-freezing and blocking fused salt gate valve |
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| CN114645953A true CN114645953A (en) | 2022-06-21 |
| CN114645953B CN114645953B (en) | 2024-04-09 |
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