CN115370765A - Take cleaning function's fused salt relief valve - Google Patents
Take cleaning function's fused salt relief valve Download PDFInfo
- Publication number
- CN115370765A CN115370765A CN202211315563.0A CN202211315563A CN115370765A CN 115370765 A CN115370765 A CN 115370765A CN 202211315563 A CN202211315563 A CN 202211315563A CN 115370765 A CN115370765 A CN 115370765A
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- Prior art keywords
- valve
- steam
- ring
- seat
- valve body
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- 150000003839 salts Chemical class 0.000 title claims abstract description 68
- 238000004140 cleaning Methods 0.000 title claims abstract description 18
- 238000010926 purge Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 25
- 239000000956 alloy Substances 0.000 claims description 24
- 229910045601 alloy Inorganic materials 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 abstract description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 235000010333 potassium nitrate Nutrition 0.000 description 2
- 239000004323 potassium nitrate Substances 0.000 description 2
- 235000010344 sodium nitrate Nutrition 0.000 description 2
- 239000004317 sodium nitrate Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- 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
- F16K1/36—Valve members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
- B08B7/0071—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
-
- 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
-
- 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
- F16K27/02—Construction of housing; Use of materials therefor of lift 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
-
- 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
- F16K49/005—Circulation means for a separate heat transfer fluid
- F16K49/007—Circulation means for a separate heat transfer fluid located within the obturating element
Abstract
The invention discloses a fused salt safety valve with a cleaning function, belongs to the field of photo-thermal fused salt power generation, and aims to solve the problem that time and labor are wasted when crystallized fused salt on a fused salt safety valve is manually treated. Including the valve body, the valve body is equipped with steam jacket outward, forms the heating cavity between steam jacket and the valve body, is equipped with on the steam jacket to press from both sides cover steam inlet and press from both sides cover steam outlet, and the steam jacket is passed to the one end that blasts the steam pipe way to with the inner chamber intercommunication of valve body, blast the steam pipe way towards valve clack and disk seat, the other end intercommunication steam source that blasts the steam pipe way is equipped with the steam check valve on the blast steam pipe way. Because of the characteristic that fused salt is easy to crystallize at low temperature, fused salt crystals are often accumulated on the valve clack and the valve seat. In the online inspection process of the safety valve, before the safety valve jumps, steam purges the valve seat and the valve clack through a purging steam pipeline, and molten salt crystals on the valve seat and the valve clack are purged completely, so that the valve clack and the valve seat are prevented from being bonded together, and the safety valve is prevented from moving.
Description
Technical Field
The invention belongs to the field of photo-thermal molten salt power generation, and particularly relates to a molten salt safety valve with a cleaning function.
Background
Solar photo-thermal power generation, generally called concentrating solar power generation, obtains heat energy by concentrating solar radiation, transfers the heat energy to water through a molten salt medium to generate high-temperature steam, and drives a steam turbine to generate power through the steam.
On the heat transfer and storage island side, the medium molten salt is formed by mixing 60% of sodium nitrate and 40% of potassium nitrate. Compared with electrochemical energy storage, the fused salt energy storage has more advantages in the aspects of renewable energy consumption, clean energy heating and the like.
The fused salt relief valve is installed in heat transfer heat island heat exchanger and outlet pipeline to prevent that pipeline pressure from surpassing the specified value, ensure equipment safe operation, because medium fused salt composition is potassium nitrate and sodium nitrate, has strong oxidizing property under high temperature, and the medium is comparatively harsh to relief valve equipment requirement, does not allow the leakage.
Because of the characteristic of fused salt crystallization, fused salt crystals are often accumulated on the valve clack and the valve seat, so that the action performance and the sealing performance of the fused salt safety valve are influenced, particularly, the crystallized fused salt needs to be treated when the safety valve is checked on line and after the fused salt safety valve jumps, the crystallized fused salt on the safety valve needs to be treated manually at present, but manual cleaning is time-consuming and labor-consuming, and is extremely inconvenient.
Disclosure of Invention
The invention aims to provide a fused salt safety valve with a cleaning function, and aims to solve the problems that crystallized fused salt on the fused salt safety valve is manually treated, and time, labor and inconvenience are wasted. The technical scheme adopted by the invention is as follows:
a molten salt safety valve with a cleaning function comprises a valve body, a valve clack, a valve seat and a valve rod;
the valve body is in a three-way shape, the valve seat is installed on the drift diameter of the lower opening of the valve body, a first guide sleeve is installed in the upper opening of the valve body, the corrugated pipe is sleeved on the first guide sleeve, the top end of the corrugated pipe is in sealing connection with the inner wall of the upper opening of the valve body, a sliding sleeve is arranged on the upper portion of the recoil disc, the sliding sleeve is arranged in an inner hole of the first guide sleeve in a sliding mode, the bottom end of the corrugated pipe is in sealing connection with the recoil disc, and the valve clack is arranged on the recoil disc;
the spring cover, the cooler and the valve body are sequentially connected from top to bottom, the lower end of the valve rod sequentially penetrates through the spring cover and the cooler and extends into a sliding sleeve of the recoil disc to be abutted against the recoil disc, an upper spring seat, a valve rod reset spring and a lower spring seat which are sequentially abutted against and connected from top to bottom are sleeved on the valve rod, the upper spring seat is abutted against and matched with the top end of the spring cover, the lower spring seat is abutted against and matched with a shaft shoulder of the valve rod, and the valve clack is abutted against and sealed with or separated from the valve seat;
the valve body is externally provided with a steam jacket, three openings of the valve body extend to the outside of the steam jacket, a heating cavity is formed between the steam jacket and the valve body, the steam jacket is provided with a jacket steam inlet and a jacket steam outlet, one end of a purging steam pipeline penetrates through the steam jacket and is communicated with the inner cavity of the valve body, the purging steam pipeline faces towards the valve clack and the valve seat, the other end of the purging steam pipeline is communicated with a steam source, and a steam one-way valve is arranged on the purging steam pipeline.
Furthermore, the recoil disc is in an inverted bowl shape, an internal thread retaining ring is arranged on the inner side of the recoil disc, a universal adjusting space is formed between the internal thread retaining ring and the top wall of the recoil disc, an external thread flange is arranged on the periphery of the valve clack, the external thread flange and the internal thread retaining ring are excessively screwed, so that the external thread flange enters the universal adjusting space, the inner top wall of the universal adjusting space is of a cone top structure, the top of the valve clack is of a ball top structure, and the ball top structure is tangent to the circular line of the cone top structure.
Furthermore, the top end of the spring cover is provided with an adjusting threaded sleeve, the spring cover is in threaded fit with the adjusting threaded sleeve, the upper end of the upper spring seat is provided with a thrust bearing, the adjusting threaded sleeve is abutted against the thrust bearing from top to bottom, the valve rod penetrates through the thrust bearing and the adjusting threaded sleeve, the adjusting threaded sleeve is provided with a locking back nut, and the locking back nut is abutted against the spring cover.
Furthermore, a rod end cover is arranged at the upper end of the spring cover, a dead-nailing bolt is in threaded fit with the rod end cover, the dead-nailing bolt is a stud bolt, and when the short head end of the dead-nailing bolt is in threaded fit with the rod end cover, the dead-nailing bolt and the rod end cover are sealed through a sealing gasket; when the long head end of the nail dead bolt is in threaded fit with the rod end cover, the nail dead bolt presses the valve clack on the valve seat through the valve rod and the recoil disc in sequence.
Furthermore, a first hard alloy ring is laser-deposited at the lower end of the valve clack, the lower end face of the first hard alloy ring is a sealing face of the valve clack, a second hard alloy ring is laser-deposited at the upper end of the valve seat, the upper end face of the second hard alloy ring is a sealing face of the valve seat, and the first hard alloy ring and the second hard alloy ring are abutted and sealed or separated.
Further, the valve seat is sleeved with an adjusting ring, the adjusting ring is in threaded fit with the valve seat, the first hard alloy ring and the second hard alloy ring are abutted against the adjusting ring up and down when being sealed, the backflushing disc and the adjusting ring are abutted against each other, a chamfering structure is arranged at the top end of an inner hole of the adjusting ring, a chamfering structure is arranged at the top end of the periphery of the valve seat, and the chamfering structure of the adjusting ring and the chamfering structure of the valve seat are combined to form an annular boosting groove.
Furthermore, the periphery of the adjusting ring is provided with a plurality of stop grooves which are formed along the axial direction, two ends of the retaining nail screw sleeve are respectively connected with the valve body and the steam jacket in a sealing mode, one end of the retaining nail penetrates through the retaining nail screw sleeve and is matched with any one of the stop grooves in an inserting mode, and the other end of the retaining nail is matched with the retaining nail screw sleeve in a sealing mode.
Furthermore, a shaft shoulder retaining ring is arranged on the lower spring seat, an inner hole of the lower spring seat is provided with a contracted taper hole structure, the top end of the shaft shoulder retaining ring is of a convex conical structure, the convex conical structure is tangent to a circular line of the taper hole structure of the lower spring seat, the valve rod penetrates through the shaft shoulder retaining ring, and the lower spring seat is abutted to the shaft shoulder of the valve rod through the shaft shoulder retaining ring.
Further, the cooler is a pipe barrel with a lower opening, flanges are arranged at the upper end and the lower end of the cooler respectively, the cooler is connected with the spring cover and the valve body through the flanges, an air pressure balance hole is formed in the upper end wall of the cooler, a second guide sleeve is arranged on the upper end wall of the cooler, the valve rod is in sliding fit with the second guide sleeve, a leakage observation pipe is arranged on the spring cover, a through hole is formed in the first guide sleeve, and the inner side of the corrugated pipe is communicated with the atmosphere environment through the through hole of the first guide sleeve, the inner cavity of the cooler, the air pressure balance hole, the inner cavity of the spring cover and the leakage observation pipe in sequence.
Furthermore, mounting flanges are arranged at the top ends of the first guide sleeve and the corrugated pipe, the first guide sleeve and the mounting flange of the corrugated pipe are connected up and down through metal backing rings, and the cooler and the valve body are clamped on two sides of the mounting flanges of the first guide sleeve and the corrugated pipe through the metal backing rings respectively.
Compared with the prior art, the invention has the beneficial effects that:
1. because of the characteristic that fused salt is easy to crystallize at low temperature, fused salt crystals are often accumulated on the valve clack and the valve seat. In the online inspection process of the safety valve, before the safety valve jumps, steam sweeps valve seat and valve clack through a steam flushing pipeline, molten salt crystals on the valve seat and the valve clack are swept completely, the valve clack and the valve seat are prevented from being bonded together, and the safety valve is prevented from moving.
2. Due to the characteristic that the molten salt is easy to crystallize at low temperature, the crystallized molten salt is remained in the cavity part of the valve body after the safety valve jumps. The valve body is heated by the steam jacket, so that the crystal fused salt in the inner cavity of the valve body is completely melted and flows out through the outlet of the valve body, and the blockage of the safety valve cavity is prevented to cause the failure of the safety valve.
3. Because the strong corrosion characteristic of fused salt adopts bellows structure, keeps apart the fused salt medium that has high temperature, strong corruption and valve rod reset spring, guarantees valve rod reset spring's performance, and then guarantees the function of fused salt relief valve.
4. The top end of the inner hole of the adjusting ring is provided with a chamfering structure, the top end of the periphery of the valve seat is provided with a chamfering structure, and the chamfering structure of the adjusting ring and the chamfering structure of the valve seat are combined to form an annular boosting groove. When the medium pressure does not reach the set pressure of the molten salt safety valve, the valve clack is required to abut against the valve seat for sealing, when the medium pressure reaches the set pressure of the molten salt safety valve, the valve clack is required to jump immediately, when the pressure of the valve rod and the medium pressure at the two ends of the valve clack reach balance, the medium is leaked from the upper opening of the valve seat, and after the medium is stored in the boosting groove, upward thrust is applied to the recoil disc to assist in opening the valve.
5. It needs to be equipped with a plurality of fused salt relief valves to pass on heat-retaining island heat exchanger and the export pipeline, when detecting arbitrary fused salt relief valve, for other fused salt relief valves do not take off the jump influence and detect, the long-end that will follow closely the dead bolt twists the pole end cover, make the dead bolt of nail press on the valve rod top, prevent the valve clack take off, detect the back of finishing and twist the pole end cover with the short-end that follows closely the dead bolt, the short-end that follows closely the dead bolt is served and is equipped with sealed the pad, can seal with the screw of pole end cover.
6. The spring is covered and is equipped with the leakage observation pipe, and the inner chamber of spring cover is through leaking observation pipe and atmospheric environment intercommunication, and this fused salt relief valve normal during operation, the bellows loops through atmospheric pressure balancing hole and leaks observation pipe and atmospheric communication to balanced bellows backpressure, when the medium took place to leak by the upper shed department of valve body, the accessible leaked observation pipe discovery, so that in time handle.
Drawings
FIG. 1 is a front half-sectional view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 3;
FIG. 6 is a schematic view of the structure of the spring housing portion;
FIG. 7 is a half sectional view of the cooler;
FIG. 8 is a half-sectional view of the kick plate;
FIG. 9 is a half-sectional view of the valve flap;
FIG. 10 is a half sectional view of the shoulder stop ring.
In the figure: 1-valve body, 11-steam jacket, 111-jacket steam inlet, 112-jacket steam outlet, 113-purge steam pipeline, 114-steam one-way valve, 12-corrugated pipe, 13-first guide sleeve, 14-metal backing ring, 15-backstop nail, 16-backstop nail screw sleeve, 2-cooler, 21-second guide sleeve, 22-air pressure balance hole, 3-valve rod, 4-spring cover, 41-adjusting screw sleeve, 42-upper spring seat, 43-thrust bearing, 44-valve rod reset spring, 45-lower spring seat, 46-shaft shoulder baffle ring, 461-convex cone structure, 47-locking back nut, 48-leakage observation pipe, 5-rod end cover, 51-nail dead bolt, 6-recoil disc, 61-sliding sleeve, 62-internal thread baffle ring, 63-universal adjusting space, 7-valve seat, 71-adjusting ring, 8-valve flap, 81-external thread flange, 82-spherical top structure and 83-first hard alloy ring.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and with reference to the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and comprises but is not limited to folding edge connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection comprises but is not limited to bolt connection, buckle connection, pin connection, hinge connection and other conventional detachment modes, when the specific connection mode is not clearly limited, the skilled person can select at least one connection mode from the existing connection modes to realize the function according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects bolt connection.
The present invention will be described in further detail with reference to the accompanying drawings, and the following examples are illustrative of the present invention, but the present invention is not limited to the following examples.
The embodiment is as follows: as shown in fig. 1-10, a molten salt safety valve with a cleaning function comprises a valve body 1, a valve clack 8, a valve seat 7 and a valve rod 3;
the valve body 1 is in a three-way shape, the valve seat 7 is installed on the drift diameter of the lower opening of the valve body 1, the first guide sleeve 13 is installed in the upper opening of the valve body 1, the corrugated pipe 12 is sleeved on the first guide sleeve 13, the top end of the corrugated pipe 12 is connected with the inner wall of the upper opening of the valve body 1 in a sealing mode, the upper portion of the recoil disc 6 is provided with a sliding sleeve 61, the sliding sleeve 61 is arranged in an inner hole of the first guide sleeve 13 in a sliding mode, the bottom end of the corrugated pipe 12 is connected with the recoil disc 6 in a sealing mode, and the valve clack 8 is arranged on the recoil disc 6;
the spring cover 4, the cooler 2 and the valve body 1 are sequentially connected from top to bottom, the lower end of the valve rod 3 sequentially penetrates through the spring cover 4 and the cooler 2 and extends into a sliding sleeve 61 of the recoil disc 6 to be abutted against the recoil disc 6, an upper spring seat 42, a valve rod reset spring 44 and a lower spring seat 45 which are sequentially abutted against and connected from top to bottom are sleeved on the valve rod 3, the upper spring seat 42 is abutted against and matched with the top end of the spring cover 4, the lower spring seat 45 is abutted against and matched with a shaft shoulder of the valve rod 3, and the valve clack 8 is abutted against and sealed or separated from the valve seat 7;
the outer of the valve body 1 is provided with a steam jacket 11, three openings of the valve body 1 extend to the outside of the steam jacket 11, a heating cavity is formed between the steam jacket 11 and the valve body 1, the steam jacket 11 is provided with a jacket steam inlet 111 and a jacket steam outlet 112, one end of a purging steam pipeline 113 penetrates through the steam jacket 11 and is communicated with an inner cavity of the valve body 1, the purging steam pipeline 113 faces the valve clack 8 and the valve seat 7, the other end of the purging steam pipeline 113 is communicated with a steam source, and the purging steam pipeline 113 is provided with a steam one-way valve 114.
The purge steam pipeline 113 is provided with a gas supply flange and a gas inlet flange which are connected in a matched mode, a sealing surface of the gas inlet flange is provided with a sinking platform, the steam one-way valve 114 is arranged in the sinking platform in a sliding mode, the bottom surface of the sinking platform is connected with the steam one-way valve 114 through a check spring, and the steam one-way valve 114 seals or opens an inner hole of the gas supply flange.
The recoil plate 6 is the bowl form of inversion, and the inboard of recoil plate 6 is equipped with internal thread fender ring 62, forms universal adjustment space 63 between the roof of internal thread fender ring 62 and recoil plate 6, and the periphery of valve clack 8 is equipped with external screw thread flange 81, and external screw thread flange 81 excessively revolves soon with internal thread fender ring 62, makes external screw thread flange 81 enter into in the universal adjustment space 63, the interior roof of universal adjustment space 63 is the cone top structure, and the top of valve clack 8 is dome structure 82, dome structure 82 with the cone top structure loop line is tangent. The valve clack 8 is universally matched with the recoil disc 6, and the axis can be automatically aligned.
The top end of the spring cover 4 is provided with an adjusting threaded sleeve 41, the spring cover 4 is in threaded fit with the adjusting threaded sleeve 41, the upper end of the upper spring seat 42 is provided with a thrust bearing 43, the adjusting threaded sleeve 41 is abutted against the thrust bearing 43 up and down, the valve rod 3 penetrates through the thrust bearing 43 and the adjusting threaded sleeve 41, the adjusting threaded sleeve 41 is provided with a locking back nut 47, and the locking back nut 47 is abutted against the spring cover 4. The adjusting screw sleeve 41 can adjust the pretightening force of the valve rod return spring 44, and the valve rod 3 presses the valve clack 8 on the valve seat 7 through the elastic force of the valve rod return spring 44. When the fused salt safety valve is opened, the valve clack 8 pushes the valve rod 3 to slide upwards, so that the valve rod return spring 44 is further compressed.
The upper end of the spring cover 4 is provided with a rod end cover 5, a dead bolt 51 is in threaded fit with the rod end cover 5, the dead bolt 51 is a stud bolt, and when the short head end of the dead bolt 51 is in threaded fit with the rod end cover 5, the dead bolt 51 and the rod end cover 5 are sealed through a sealing gasket; when the long end of the nail bolt 51 is in threaded engagement with the rod end cover 5, the nail bolt 51 presses the valve flap 8 against the valve seat 7 through the valve rod 3 and the recoil disc 6 in sequence. It needs to be equipped with a plurality of fused salt relief valves to pass on heat-retaining island heat exchanger and the export pipeline thereof, when detecting arbitrary fused salt relief valve, in order to prevent that other fused salt relief valves from taking off and jumping the influence and detecting, will follow closely the long-end of dead bolt 51 and twist pole end shield 5, make and follow closely dead bolt 51 press on 3 tops of valve rod, prevent that valve clack 8 from taking off and jumping, detect and finish the back and twist pole end shield 5 with the short-end of the dead bolt 51 of following closely, the short-end of the dead bolt 51 of following closely is served and is overlapped and is equipped with sealed the pad, can seal the screw of pole end shield 5.
The lower end of the valve clack 8 is laser-deposited with a first hard alloy ring 83, the lower end face of the first hard alloy ring 83 is a sealing face of the valve clack 8, the upper end of the valve seat 7 is laser-deposited with a second hard alloy ring, the upper end face of the second hard alloy ring is a sealing face of the valve seat 7, and the first hard alloy ring 83 and the second hard alloy ring are abutted and sealed or separated. The laser deposited hard alloy ring is used for sealing, and the strength of parts can be improved.
The adjusting ring 71 is sleeved on the valve seat 7, the adjusting ring 71 is in threaded fit with the valve seat 7, the first hard alloy ring 83 and the second hard alloy ring are abutted against and sealed, the recoil disc 6 and the adjusting ring 71 are abutted against from top to bottom, the top end of an inner hole of the adjusting ring 71 is provided with a chamfering structure, the peripheral top end of the valve seat 7 is provided with a chamfering structure, and the chamfering structure of the adjusting ring 71 and the chamfering structure of the valve seat 7 are combined to form an annular boosting groove. When the medium pressure does not reach the set pressure of the fused salt safety valve, the valve clack 8 is required to be abutted against and sealed with the valve seat 7, when the medium pressure reaches the set pressure of the fused salt safety valve, the valve clack 8 is required to jump immediately, so that the external valve opening force is required to be applied when the medium pressure reaches the set pressure of the safety valve, when the pressure of the valve rod and the medium pressure on the two ends of the valve clack 8 reach balance, the medium is leaked from the upper opening of the valve seat 7, and after being stored in the boosting groove, the upward thrust is applied to the recoil disc 6 to assist in opening the valve.
The periphery of the adjusting ring 71 is provided with a plurality of stop grooves which are axially formed, two ends of the retaining nail threaded sleeve 16 are respectively connected with the valve body 1 and the steam jacket 11 in a sealing mode, one end of the retaining nail 15 penetrates through the retaining nail threaded sleeve 16 and is in plug-in fit with any one of the stop grooves, and the other end of the retaining nail 15 is in sealing fit with the retaining nail threaded sleeve 16. The retaining pin 15 is used to prevent the adjustment ring 71 from rotating.
Be equipped with the shaft shoulder on the lower spring holder 45 and keep off ring 46, the hole of lower spring holder 45 is equipped with the taper hole structure of shrink, and the top that the shaft shoulder kept off ring 46 is convex surface toper structure 461, and convex surface toper structure 461 is tangent with the taper hole structure ring line of lower spring holder 45, and valve rod 3 runs through shaft shoulder and keeps off ring 46, and lower spring holder 45 keeps off the shoulder of ring 46 and valve rod 3 through the shaft shoulder and supports and lean on.
The cooler 2 is a pipe barrel with a lower opening, flanges are arranged at the upper end and the lower end of the cooler 2, the cooler 2 is connected with the spring cover 4 and the valve body 1 through the flanges respectively, an air pressure balance hole 22 is formed in the upper end wall of the cooler 2, a second guide sleeve 21 is arranged on the upper end wall of the cooler 2, and the valve rod 3 is in sliding fit with the second guide sleeve 21. Be equipped with on the spring housing 4 and leak observation pipe 48, be equipped with the through-hole on first uide bushing (13), the inboard of bellows (12) loops through the through-hole of first uide bushing (13), the inner chamber of cooler (2), atmospheric pressure balancing hole 22, the inner chamber of spring housing 4 and leak observation pipe 48 and atmospheric environment intercommunication, this fused salt relief valve is normal during operation, bellows 12 loops through atmospheric pressure balancing hole 22 and leaks observation pipe 48 and atmospheric communication, with balanced bellows 12 backpressure, when the medium takes place to leak by the upper shed department of valve body 1, accessible leaks observation pipe 48 discovery, so that in time handle.
The top ends of the first guide sleeve 13 and the corrugated pipe 12 are respectively provided with an installation flange, the installation flanges of the first guide sleeve 13 and the corrugated pipe 12 are connected up and down through a metal backing ring 14, and the cooler 2 and the valve body 1 are clamped on two sides of the installation flanges of the first guide sleeve 13 and the corrugated pipe 12 through the metal backing ring 14 respectively.
The valve body 1 is in threaded connection with the valve seat 7 and is sealed in a pressing mode through a gasket.
Because of the low-temperature and easy-crystallization characteristic of the fused salt, fused salt crystals are often accumulated on the valve clack 8 and the valve seat 7. In the online inspection process of the safety valve, before the safety valve jumps, steam purges the valve seat 7 and the valve clack 8 through the purging steam pipeline 113, and molten salt crystals on the valve seat 7 and the valve clack 8 are purged completely, so that the valve clack 8 and the valve seat 7 are prevented from being bonded together, and the action of the safety valve is prevented from being refused.
Due to the characteristic that the molten salt is easy to crystallize at low temperature, the crystallized molten salt is remained in the cavity part of the valve body after the safety valve jumps. The valve body 1 is heated through the steam jacket 11, so that the crystal fused salt in the inner cavity of the valve body 1 is completely melted and flows out through the outlet of the valve body 1, and the cavity of the safety valve is prevented from being blocked, so that the safety valve is prevented from moving.
Because the strong corrosion characteristic of fused salt adopts bellows 12 structure, keeps apart the fused salt medium that has high temperature, strong corrosion and valve rod reset spring 44, guarantees valve rod reset spring 44's performance, and then guarantees the function of fused salt relief valve.
The above embodiments are merely illustrative of the present patent and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.
Claims (10)
1. The utility model provides a take cleaning function's fused salt relief valve, includes valve body (1), valve clack (8), disk seat (7) and valve rod (3), its characterized in that:
the valve body (1) is in a three-way shape, the valve seat (7) is installed on the drift diameter of the lower opening of the valve body (1), a first guide sleeve (13) is installed in the upper opening of the valve body (1), the corrugated pipe (12) is sleeved on the first guide sleeve (13), the top end of the corrugated pipe (12) is in sealing connection with the inner wall of the upper opening of the valve body (1), a sliding sleeve (61) is arranged on the upper portion of the recoil disc (6), the sliding sleeve (61) is slidably arranged in an inner hole of the first guide sleeve (13), the bottom end of the corrugated pipe (12) is in sealing connection with the recoil disc (6), and the valve clack (8) is arranged on the recoil disc (6);
the spring cover (4), the cooler (2) and the valve body (1) are sequentially connected from top to bottom, the lower end of the valve rod (3) sequentially penetrates through the spring cover (4) and the cooler (2) and extends into a sliding sleeve (61) of the recoil disc (6) to be abutted against the recoil disc (6), an upper spring seat (42), a valve rod reset spring (44) and a lower spring seat (45) which are sequentially abutted against and connected from top to bottom are sleeved on the valve rod (3), the upper spring seat (42) is abutted against and matched with the top end of the spring cover (4), the lower spring seat (45) is abutted against and matched with a shaft shoulder of the valve rod (3), and the valve clack (8) is abutted against and sealed or separated from the valve seat (7);
the outer steam jacket (11) that is equipped with of valve body (1), the three opening of valve body (1) extends to outside steam jacket (11), form the heating cavity between steam jacket (11) and valve body (1), be equipped with on steam jacket (11) and press from both sides cover steam inlet (111) and press from both sides cover steam outlet (112), steam jacket (11) are passed to the one end of purging steam pipeline (113), and with the inner chamber intercommunication of valve body (1), purge steam pipeline (113) towards valve clack (8) and disk seat (7), the other end intercommunication steam source of purging steam pipeline (113), be equipped with steam check valve (114) on purging steam pipeline (113).
2. The molten salt safety valve with the cleaning function according to claim 1, characterized in that: the recoil dish (6) are the bowl form of inversion, and the inboard of recoil dish (6) is equipped with internal thread fender ring (62), and internal thread fender ring (62) and the roof of recoil dish (6) between form universal adjustment space (63), and the periphery of valve clack (8) is equipped with external screw thread flange (81), and external screw thread flange (81) are excessively twisted with internal thread fender ring (62), make external screw thread flange (81) enter into in the universal adjustment space (63), the interior roof of universal adjustment space (63) is the cone top structure, and the top of valve clack (8) is dome structure (82), dome structure (82) with the cone top structure ring line is tangent.
3. The molten salt safety valve with the cleaning function according to claim 1, characterized in that: the top of spring housing (4) is equipped with adjustment swivel nut (41), and spring housing (4) and adjustment swivel nut (41) screw-thread fit go up the upper end of spring holder (42) and be equipped with thrust bearing (43), and adjustment swivel nut (41) offsets from top to bottom with thrust bearing (43), and thrust bearing (43) and adjustment swivel nut (41) are run through in valve rod (3), are equipped with locking back of the body (47) on adjustment swivel nut (41), and locking back of the body (47) offsets with spring housing (4) and leans on.
4. The molten salt safety valve with the cleaning function according to claim 1, characterized in that: the upper end of the spring cover (4) is provided with a rod end cover (5), a dead bolt (51) is in threaded fit with the rod end cover (5), the dead bolt (51) is a stud bolt, and when the short head end of the dead bolt (51) is in threaded fit with the rod end cover (5), the dead bolt (51) and the rod end cover (5) are sealed through a sealing gasket; when the long head end of the nail dead bolt (51) is in threaded fit with the rod end cover (5), the nail dead bolt (51) presses the valve clack (8) on the valve seat (7) through the valve rod (3) and the recoil disc (6) in sequence.
5. The molten salt safety valve with the cleaning function according to claim 4, characterized in that: the lower end of the valve clack (8) is laser-deposited with a first hard alloy ring (83), the lower end face of the first hard alloy ring (83) is a sealing face of the valve clack (8), the upper end of the valve seat (7) is laser-deposited with a second hard alloy ring, the upper end face of the second hard alloy ring is a sealing face of the valve seat (7), and the first hard alloy ring (83) and the second hard alloy ring are abutted and sealed or separated.
6. A molten salt safety valve with a cleaning function according to claim 5, characterized in that: the cover is equipped with adjusting ring (71) on disk seat (7), adjusting ring (71) and disk seat (7) screw-thread fit, first carbide ring (83) with when second carbide ring supports to lean on sealed, recoil dish (6) support from top to bottom with adjusting ring (71) and lean on, and the hole top of adjusting ring (71) is equipped with the chamfer structure, and the periphery top of disk seat (7) is equipped with the chamfer structure, and the chamfer structure of adjusting ring (71) and the chamfer structure combination of disk seat (7) form annular boosting groove.
7. The molten salt safety valve with the cleaning function according to claim 6, characterized in that: the periphery of the adjusting ring (71) is provided with a plurality of stop grooves which are formed along the axial direction, two ends of the retaining nail threaded sleeve (16) are respectively in sealing connection with the valve body (1) and the steam jacket (11), one end of the retaining nail (15) penetrates through the retaining nail threaded sleeve (16) and is in plug-in fit with any stop groove, and the other end of the retaining nail (15) is in sealing fit with the retaining nail threaded sleeve (16).
8. The molten salt safety valve with the cleaning function according to claim 1, characterized in that: be equipped with the shaft shoulder on lower spring holder (45) and keep off ring (46), the hole of lower spring holder (45) is equipped with the taper hole structure of shrink, and the top that the shaft shoulder kept off ring (46) is convex surface toper structure (461), and convex surface toper structure (461) is tangent with the taper hole structure ring line of lower spring holder (45), and shaft shoulder fender ring (46) is run through in valve rod (3), and lower spring holder (45) keep off the shoulder of ring (46) and valve rod (3) through the shaft shoulder and support and lean on.
9. The molten salt safety valve with the cleaning function according to claim 1, characterized in that: cooler (2) is the bobbin of under shed, the upper and lower both ends of cooler (2) all are equipped with the flange, cooler (2) respectively with spring housing (4) and valve body (1) flange joint, be equipped with atmospheric pressure balance hole (22) on the upper end wall of cooler (2), be equipped with second uide bushing (21) on the upper end wall of cooler (2), valve rod (3) and second uide bushing (21) sliding fit, be equipped with leakage observation pipe (48) on spring housing (4), be equipped with the through-hole on first uide bushing (13), the inboard of bellows (12) loops through the through-hole of first uide bushing (13), the inner chamber of cooler (2), atmospheric pressure balance hole (22), the inner chamber and the leakage observation pipe (48) of spring housing (4) communicate with atmospheric environment.
10. The molten salt safety valve with the cleaning function according to any one of claims 1 to 9, characterized in that: the top ends of the first guide sleeve (13) and the corrugated pipe (12) are respectively provided with an installation flange, the installation flanges of the first guide sleeve (13) and the corrugated pipe (12) are connected up and down through a metal backing ring (14), and the cooler (2) and the valve body (1) are clamped on the two sides of the installation flanges of the first guide sleeve (13) and the corrugated pipe (12) through the metal backing ring (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211315563.0A CN115370765A (en) | 2022-10-26 | 2022-10-26 | Take cleaning function's fused salt relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211315563.0A CN115370765A (en) | 2022-10-26 | 2022-10-26 | Take cleaning function's fused salt relief valve |
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| Publication Number | Publication Date |
|---|---|
| CN115370765A true CN115370765A (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211315563.0A Pending CN115370765A (en) | 2022-10-26 | 2022-10-26 | Take cleaning function's fused salt relief valve |
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| Country | Link |
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| CN (1) | CN115370765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117212512A (en) * | 2023-11-07 | 2023-12-12 | 哈电集团哈尔滨电站阀门有限公司 | Spring type safety valve for low-temperature medium |
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| CN215059797U (en) * | 2021-02-04 | 2021-12-07 | 浙江杭惠阀门有限公司 | Safety valve of heat-insulating jacket |
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| CN1847709A (en) * | 2005-04-13 | 2006-10-18 | 上海凯特阀门制造有限公司 | Safety valve specially for aluminium industry |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117212512A (en) * | 2023-11-07 | 2023-12-12 | 哈电集团哈尔滨电站阀门有限公司 | Spring type safety valve for low-temperature medium |
| CN117212512B (en) * | 2023-11-07 | 2024-02-09 | 哈电集团哈尔滨电站阀门有限公司 | Spring type safety valve for low-temperature medium |
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Application publication date: 20221122 |