CN113983345B - Main steam drainage electric valve for steam turbine - Google Patents
Main steam drainage electric valve for steam turbine Download PDFInfo
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- CN113983345B CN113983345B CN202111207711.2A CN202111207711A CN113983345B CN 113983345 B CN113983345 B CN 113983345B CN 202111207711 A CN202111207711 A CN 202111207711A CN 113983345 B CN113983345 B CN 113983345B
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- pipe
- wall
- lifting
- valve body
- positioning
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 210000003437 trachea Anatomy 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 2
- 230000036632 reaction speed Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- -1 steam condensate Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/20—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats
- F16T1/22—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats of closed-hollow-body type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
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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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
-
- 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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
- F16T1/386—Actuating mechanisms for lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
- F16T1/48—Monitoring arrangements for inspecting, e.g. flow of steam and steam condensate
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a main steam drainage electric valve for a steam turbine, which comprises a valve body shell and an L-shaped liquid drainage pipe communicated with the bottom of the valve body shell, wherein a liquid drainage opening and closing device is arranged in the valve body shell, the liquid drainage opening and closing device comprises a positioning pipe, a lifting pipe and an elastic extension part, the top of the positioning pipe is connected with the top of the inner wall of the valve body shell, the lifting pipe is connected with the inner wall of the positioning pipe in a sliding manner, the sealing part is arranged at the bottom of the lifting pipe, and the elastic extension part is sleeved on the positioning pipe and the side wall of the lifting pipe; the lifting pipe is internally provided with a water level detection device, the water level detection device comprises a filtering water inlet part arranged on the side wall of the lifting pipe, a lifting airlock part covered outside the filtering water inlet part, a buoyancy part arranged on the inner wall of the lifting pipe and the top end of which extends into the positioning pipe, and a distance measuring part arranged on the top of the inner wall of the positioning pipe; the bottom of the L-shaped liquid discharge pipe is provided with an electric opening device of which the execution end extends into the L-shaped liquid discharge pipe. The invention relates to a steam drainage electric valve with high reaction speed and stable drainage.
Description
Technical Field
The invention mainly relates to the technical field of steam drain valves, in particular to an electric valve for draining main steam for a steam turbine.
Background
The steam trap has the function of automatically removing non-condensable gases such as steam condensate, air and the like in heating equipment or a steam pipeline, and steam is not leaked.
According to the bellows and the bellows type drain valve for the thermostatic drain valve provided by the patent document with the application number of CN200720128886.3, the product comprises a valve body with an open cavity, a valve cover, a valve seat, a valve clack and the bellows; a water outlet and a water vapor inlet are arranged in the cavity of the valve body, a water discharge interface and a water vapor inlet interface are arranged on the outer side of the valve body, and the valve cover is in sealing connection with the valve body at the opening of the cavity of the valve body; the valve seat is fixed on a water outlet in the cavity of the valve body through threaded connection, one end of the corrugated pipe provided with a connecting shaft is fixedly connected with the valve cover, and the valve clack is fixed at the other end of the corrugated pipe. The expansion and elongation rate of the corrugated pipe is improved by 10%, frequent adjustment is not needed, and the problem that the corrugated pipe is bent when being expanded and elongated by heating is solved.
The product in the above patent improves the expansion elongation rate of the corrugated pipe by 10%, does not need to be regulated frequently, overcomes the problem that the corrugated pipe bends when being expanded by heating, but controls drainage by means of expansion caused by heat and contraction caused by cold of the corrugated pipe, and has long reaction time and untimely drainage.
Disclosure of Invention
The invention mainly provides a main steam hydrophobic electric valve for a steam turbine, which is used for solving the technical problems in the background technology.
The technical scheme adopted for solving the technical problems is as follows:
The main steam drainage electric valve for the steam turbine comprises a valve body shell, a liquid inlet pipe communicated with the side wall of the valve body shell, and an L-shaped liquid drainage pipe communicated with the bottom of the valve body shell, wherein a liquid drainage opening and closing device is arranged in the valve body shell and comprises a positioning pipe, the top of the positioning pipe is connected with the top of the inner wall of the valve body shell, a lifting pipe is connected with the inner wall of the positioning pipe in a sliding manner, the bottom end of the lifting pipe extends to the lower part of the positioning pipe, a sealing part is arranged at the bottom of the lifting pipe and used for sealing the L-shaped liquid drainage pipe, and an elastic extension part is respectively sleeved on the side wall of the positioning pipe and the side wall of the lifting pipe at the top and the bottom end of the lifting pipe;
The lifting pipe is internally provided with a water level detection device, the water level detection device comprises a filtering water inlet part which is arranged on the side wall of the lifting pipe and is positioned between the elastic extension part and the sealing part, a lifting airlock part which is arranged on the side wall of the lifting pipe and covers the outside of the filtering water inlet part, a buoyancy part which is arranged on the inner wall of the lifting pipe and the top end of which extends into the positioning pipe, and a distance measuring part which is arranged on the top of the inner wall of the positioning pipe;
The bottom of the L-shaped liquid discharge pipe is provided with an electric opening device, the execution end of which extends into the L-shaped liquid discharge pipe, and the electric opening device is used for moving the sealing part upwards when the distance value measured by the distance measuring part from the buoyancy part is smaller than a set value.
Preferably, a plurality of anti-rotation bosses are arranged on the annular array of the side wall of the lifting tube, and anti-rotation grooves matched with the anti-rotation bosses are arranged on the inner wall of the positioning tube. In the preferred embodiment, the rotation of the lifting tube and the positioning tube can be prevented by the cooperation of the rotation preventing boss and the rotation preventing groove, so that the lifting tube can be kept stably lifted.
Preferably, the sealing component comprises a round table-shaped sealing block arranged at the bottom of the lifting tube and a sealing inclined plane which is arranged on the inner wall of the L-shaped liquid discharge tube and matched with the round table-shaped sealing block. In the preferred embodiment, the sealing part is convenient for sealing the L-shaped liquid discharge pipe, and steam leakage is effectively prevented.
Preferably, the elastic extension part comprises a corrugated outer sleeve, the top end and the bottom end of which are respectively sleeved on the side wall of the positioning pipe and the side wall of the lifting pipe, and a gas tank arranged at the top of the valve body shell, and the gas tank is communicated with the corrugated outer sleeve through a pipeline. In the preferred embodiment, the elastic extension part can give thrust to the lifting tube so that the lifting tube drives the sealing part to seal the L-shaped liquid discharge tube.
Preferably, an air pressure sensor is arranged on the inner wall of the corrugated outer sleeve, and the PLC receives pressure data of the air pressure sensor and opens a valve of the air tank so that air flow enters the corrugated outer sleeve until the pressure data is consistent with a set value. In the preferred embodiment, the PLC controller receives pressure data from the air pressure sensor and opens the valve of the air tank to allow air flow into the corrugated outer sleeve until the pressure data matches a set point so as to give a stable downward thrust to the elevator tube.
Preferably, the filtering water inlet component comprises a plurality of water inlet through holes penetrating through the side wall of the lifting pipe, and a filtering ring which is arranged on the outer wall of the lifting pipe and sleeved outside the water inlet through holes. In the preferred embodiment, the water entering the elevator tube is filtered by the filter inlet member.
Preferably, the lifting airlock part comprises an annular floating plate sleeved on the outer wall of the lifting pipe, and an airlock cover pipe arranged at the bottom of the annular floating plate and covered outside the filtering water inlet part. In the preferred embodiment, sealing of the filter inlet member is facilitated by lifting the airlock member as steam enters the valve body.
Preferably, the buoyancy member is including locating the elevator inner wall just is located the spacing boss on filtration water inlet member upper portion, the bushing of bottom contact spacing boss, locates annular gasbag on the bushing, locate plunger board on the annular gasbag, locate plunger board top just extends to the connecting rod in the registration arm, and locate the ranging plate on connecting rod top, elevator top intercommunication trachea bottom, trachea top intercommunication valve body shell inner wall top. In the present preferred embodiment, the buoyancy member facilitates upward movement by buoyancy of the water accumulated in the valve body.
Preferably, the distance measuring component comprises a distance sensor arranged at the top of the inner wall of the positioning tube, and a limit sleeve arranged at the top of the inner wall of the positioning tube and sleeved outside the distance sensor, wherein the length of the limit sleeve is larger than that of the distance sensor. In the preferred embodiment, the PLC receives distance data between the buoyancy member and the distance sensor, and triggers the electric opening device when the distance data is smaller than a set value, so that the electric opening device pushes up the sealing member.
Preferably, the electric opening device comprises a driving cylinder arranged at the bottom of the L-shaped liquid discharge pipe, and the execution end of the driving cylinder penetrates through the bottom of the L-shaped liquid discharge pipe to be connected with a push rod. In the preferred embodiment, the electric opening device may push up the sealing member with a mechanical force.
Compared with the prior art, the invention has the beneficial effects that:
the valve can measure the water accumulation in the valve so as to realize the liquid discharge by opening the valve through mechanical force, and has high reaction speed and high water discharge efficiency;
The lifting tube can be pushed by the elastic extension part so that the lifting tube drives the sealing part to seal the L-shaped liquid discharge tube, the PLC receives pressure data of the air pressure sensor and opens the valve of the air tank, so that air flow enters the corrugated outer sleeve until the pressure data is consistent with a set value, stable downward pushing force is conveniently given to the lifting tube, the L-shaped liquid discharge tube is conveniently sealed by the sealing part, steam leakage is effectively prevented, relative rotation between the lifting tube and the positioning tube can be prevented by matching the anti-rotation boss with the anti-rotation groove so as to conveniently keep the lifting tube stable lifting, water entering the lifting tube is conveniently filtered by the filtering water inlet part, the filtering water inlet part is conveniently sealed when steam enters the valve body by the lifting air lock part, the air flow is conveniently moved upwards under the buoyancy effect of water accumulated in the valve body, the PLC receives distance data between the distance sensor and the buoyancy part, and the electric opening device is triggered when the distance data is smaller than the set value, so that the electric opening device pushes up the sealing part, and the electric opening device can push up the sealing part by mechanical force.
The invention will be explained in detail below with reference to the drawings and specific embodiments.
Drawings
FIG. 1 is an isometric view of the overall structure of the present invention;
FIG. 2 is an exploded view of the overall structure of the present invention;
FIG. 3 is an exploded view of the internal structure of the valve body housing of the present invention;
FIG. 4 is an exploded view showing the construction of the water level detecting apparatus of the present invention;
FIG. 5 is a side view of the overall structure of the present invention;
FIG. 6 is a cross-sectional view of the overall structure of the present invention;
FIG. 7 is a sectional view showing the construction of the water level detecting unit of the present invention;
fig. 8 is an enlarged view of the structure at a of the present invention.
Description of the drawings: 10. a valve body housing; 11. a liquid inlet pipe; 12. an L-shaped liquid discharge pipe; 20. a liquid discharge opening and closing device; 21. a positioning tube; 211. an anti-rotation groove; 22. a lifting tube; 221. anti-rotation boss; 23. a sealing member; 231. a round table-shaped sealing block; 232. sealing inclined planes; 24. an elastic extension member; 241. a corrugated outer sleeve; 242. a gas tank; 243. an air pressure sensor; 30. a water level detecting device; 31. filtering the water inlet component; 311. a water inlet through hole; 312. a filter ring; 32. a lifting airlock component; 321. an annular floating plate; 322. an airlock cover tube; 33. a buoyancy member; 331. a limit boss; 332. a bushing; 333. an annular air bag; 334. a plunger plate; 335. a connecting rod; 336. a ranging plate; 337. an air pipe; 34. a distance measuring part; 341. a distance sensor; 342. a limit sleeve; 40. an electric opening device; 41. a drive cylinder; 42. a push rod.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will be rendered by reference to the appended drawings, in which several embodiments of the invention are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this invention belongs, and the knowledge of terms used in the description of this invention herein for the purpose of describing particular embodiments is not intended to limit the invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, 2, 3,5 and 6, in a preferred embodiment of the present invention, a main steam drain electric valve for a steam turbine includes a valve body housing 10, a liquid inlet pipe 11 connected to a side wall of the valve body housing 10, and an L-shaped liquid drain pipe 12 connected to a bottom of the valve body housing 10, wherein a liquid drain opening and closing device 20 is disposed in the valve body housing 10, the liquid drain opening and closing device 20 includes a positioning pipe 21 with a top connected to a top of an inner wall of the valve body housing 10, a lifting pipe 22 slidingly connected to an inner wall of the positioning pipe 21 and a bottom end extending to a lower portion of the positioning pipe 21, a sealing member 23 disposed at a bottom of the lifting pipe 22 for sealing the L-shaped liquid drain pipe 12, and an elastic extension member 24 with a top end and a bottom end respectively sleeved on a side wall of the positioning pipe 21 and a side wall of the lifting pipe 22; the circular array of the side wall of the lifting tube 22 is provided with a plurality of anti-rotation bosses 221, the inner wall of the positioning tube 21 is provided with an anti-rotation groove 211 matched with the anti-rotation bosses 221, the sealing part 23 comprises a circular table-shaped sealing block 231 arranged at the bottom of the lifting tube 22 and a sealing inclined surface 232 arranged on the inner wall of the L-shaped liquid discharge tube 12 and matched with the circular table-shaped sealing block 231, the elastic expansion part 24 comprises a corrugated outer sleeve 241, the top end and the bottom end of which are respectively sleeved on the side wall of the positioning tube 21 and the side wall of the lifting tube 22, and a gas tank 242 arranged at the top of the valve body shell 10, the gas tank 242 is communicated with the corrugated outer sleeve 241 through a pipeline, the inner wall of the corrugated outer sleeve 241 is provided with a gas pressure sensor 243, and the PLC controller receives pressure data of the gas tank 242 and opens a valve of the gas tank 242 so that gas flow enters the corrugated outer sleeve 241 until the pressure data is consistent with a set value.
In this embodiment, in the normal state, the L-shaped liquid discharge tube 12 is in a sealed state, and the elastic extension member 24 can provide a downward pushing force to the lifting tube 22, so that the lifting tube 22 drives the sealing member 23 to seal the L-shaped liquid discharge tube 12;
Further, when the elastic extension member 24 works, the air pressure inside the corrugated outer sleeve 241 is large, so that the corrugated outer sleeve 241 is in an extended state, so as to give downward thrust to the lifting tube 22;
Further, the PLC controller receives the pressure data from the air pressure sensor 243 and opens the valve of the air tank 242 to allow the air flow into the bellows outer jacket 241 until the pressure data is consistent with the set value, so as to give a stable downward thrust to the lifting tube 22;
Further, when the sealing component 23 works, the round table-shaped sealing block 231 and the sealing inclined surface 232 are matched to form a good sealing effect, so that steam is effectively prevented from leaking through the L-shaped liquid discharge pipe 12, and the round table-shaped sealing block 231 and the sealing inclined surface 232 are matched to facilitate limiting of the lower stroke of the lifting pipe 22;
Further, the rotation preventing boss 221 cooperates with the rotation preventing groove 211 to prevent the relative rotation between the lifting tube 22 and the positioning tube 21, so as to maintain stable lifting of the lifting tube 22.
Referring to fig. 2,4, 7 and 8, in another preferred embodiment of the present invention, a water level detecting device 30 is disposed in the lifting tube 22, the water level detecting device 30 includes a filtering water inlet member 31 disposed on a sidewall of the lifting tube 22 and located between the elastic extension member 24 and the sealing member 23, a lifting air lock member 32 disposed on a sidewall of the lifting tube 22 and covering an outer portion of the filtering water inlet member 31, a buoyancy member 33 disposed on an inner wall of the lifting tube 22 and having a top end extending into the positioning tube 21, and a distance measuring member 34 disposed on a top portion of an inner wall of the positioning tube 21; the filtering water inlet part 31 comprises a plurality of water inlet holes 311 penetrating through the side wall of the lifting pipe 22, and a filtering ring 312 arranged on the outer wall of the lifting pipe 22 and sleeved outside the water inlet holes 311, the lifting air lock part 32 comprises an annular floating plate 321 sleeved on the outer wall of the lifting pipe 22, and an air lock cover tube 322 arranged at the bottom of the annular floating plate 321 and covered outside the filtering water inlet part 31, the buoyancy part 33 comprises a limit boss 331 arranged on the inner wall of the lifting pipe 22 and positioned at the upper part of the filtering water inlet part 31, a drain plate 332 with the bottom contacting the limit boss 331, an annular air bag 333 arranged on the drain plate 332, the plunger plate 334 on the annular air bag 333, the connecting rod 335 arranged at the top of the plunger plate 334 and extending into the positioning tube 21, and the distance measuring plate 336 arranged at the top end of the connecting rod 335, the top end of the lifting tube 22 is communicated with the bottom end of the air tube 337, the top end of the air tube 337 is communicated with the top of the inner wall of the valve body shell 10, the distance measuring component 34 comprises a distance sensor 341 arranged at the top of the inner wall of the positioning tube 21, and a limit sleeve 342 arranged at the top of the inner wall of the positioning tube 21 and sleeved outside the distance sensor 341, and the length of the limit sleeve 342 is larger than that of the distance sensor 341.
It should be noted that, in this embodiment, when steam enters the valve body housing 10, the steam gives pressure to the annular floating plate 321 to make the air lock cover tube 322 seal the filtering water inlet component 31, when condensed water is accumulated in the valve body housing 10, the condensed water drives the annular floating plate 321 and the air lock cover tube 322 to move upwards, the condensed water is filtered by the filtering water inlet component 31 and enters the lifting tube 22, and drives the buoyancy component 33 to move upwards through buoyancy, the PLC controller receives distance data between the distance sensor 341 and the distance measuring plate 336, and when the distance data is smaller than a set value, the PLC controller triggers the electric opening device 40 to push up the sealing component 23, and when the distance data is greater than or equal to the set value, the electric opening device 40 is in a closed state;
further, the condensed water filtered by the filter ring 312 enters the lifting pipe 22 through the water inlet through hole 311;
Further, the condensed water drives the plunger plate 334, the connecting rod 335 and the ranging plate 336 to move upwards through the buoyancy, the air at the upper part of the plunger plate 334 is discharged out of the valve body shell 10 through the air pipe 337, and the condensed water carries out buoyancy support on the bushing plate 332 and the annular air bag 333 so as to facilitate rapid upward movement of the ranging plate 336;
further, the limit sleeve 342 may protect the distance sensor 341.
Referring to fig. 3, 5 and 7, in another preferred embodiment of the present invention, an electric opening device 40 with an actuating end extending into the L-shaped liquid discharge tube 12 is disposed at the bottom of the L-shaped liquid discharge tube 12, the electric opening device 40 is configured to move the sealing member 23 upwards when the distance value measured by the distance measuring member 34 from the buoyancy member 33 is smaller than a set value, the electric opening device 40 includes a driving cylinder 41 disposed at the bottom of the L-shaped liquid discharge tube 12, and the actuating end of the driving cylinder 41 is connected to a push rod 42 penetrating through the bottom of the L-shaped liquid discharge tube 12.
In this embodiment, when the electric opening device 40 is operated, the actuating end of the driving cylinder 41 drives the push rod 42 to move upwards, and the push rod 42 pushes up the sealing block 231 in a circular truncated cone shape to open the L-shaped drain pipe 12, so as to drain the accumulated water.
The specific flow of the invention is as follows:
The model of the PLC controller is IVC2, the model of the air pressure sensor 243 is BRW800-2100, and the model of the distance sensor 341 is LR08BN04 DNOY.
In a normal state, the L-shaped liquid discharge pipe 12 is in a closed state, and downward thrust can be given to the lifting pipe 22 through the elastic extension part 24, so that the lifting pipe 22 drives the sealing part 23 to seal the L-shaped liquid discharge pipe 12;
When the elastic expansion part 24 works, the inner air pressure of the corrugated outer sleeve 241 is large, so that the corrugated outer sleeve 241 is in an expanded state, and the downward thrust of the lifting pipe 22 is conveniently given;
The PLC receives the pressure data of the air pressure sensor 243 and opens the valve of the air tank 242 so that the air flow enters the corrugated outer sleeve 241 until the pressure data is consistent with a set value, so as to give stable downward thrust to the lifting pipe 22;
when the sealing component 23 works, the round table-shaped sealing block 231 and the sealing inclined surface 232 are matched to form a good sealing effect, so that steam is effectively prevented from leaking through the L-shaped liquid discharge pipe 12, and the round table-shaped sealing block 231 and the sealing inclined surface 232 are matched to facilitate limiting of the lower stroke of the lifting pipe 22;
the rotation preventing boss 221 is matched with the rotation preventing groove 211 to prevent the relative rotation between the lifting tube 22 and the positioning tube 21 so as to maintain the stable lifting of the lifting tube 22;
When steam enters the valve body shell 10, the steam gives pressure to the annular floating plate 321 so that the air lock cover pipe 322 seals the filtering water inlet component 31, after the condensed water is accumulated in the valve body shell 10, the condensed water drives the annular floating plate 321 and the air lock cover pipe 322 to move upwards, the condensed water enters the lifting pipe 22 after being filtered by the filtering water inlet component 31 and drives the buoyancy component 33 to move upwards through buoyancy, the PLC controller receives distance data between the distance sensor 341 and the distance measuring plate 336 and triggers the electric opening device 40 when the distance data is smaller than a set value, so that the electric opening device 40 pushes up the sealing component 23, and when the distance data is larger than or equal to the set value, the electric opening device 40 is in a closed state;
The condensed water filtered by the filter ring 312 enters the lifting pipe 22 through the water inlet through hole 311;
The condensed water drives the plunger plate 334, the connecting rod 335 and the ranging plate 336 to move upwards through buoyancy, air at the upper part of the plunger plate 334 is discharged out of the valve body shell 10 through the air pipe 337, and the condensed water carries out buoyancy support on the bushing plate 332 and the annular air bag 333 so as to facilitate rapid upward movement of the ranging plate 336;
The limit sleeve 342 may protect the distance sensor 341;
when the electric opening device 40 works, the actuating end of the actuating cylinder 41 drives the push rod 42 to move upwards, and the push rod 42 pushes the round table-shaped sealing block 231 upwards to open the L-shaped liquid discharge pipe 12 so as to discharge accumulated water.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the embodiments described above, but is intended to be within the scope of the invention, as long as such insubstantial modifications are made by the method concepts and technical solutions of the invention, or the concepts and technical solutions of the invention are applied directly to other occasions without any modifications.
Claims (9)
1. The electric valve for the steam turbine main steam drainage comprises a valve body shell (10), a liquid inlet pipe (11) communicated with the side wall of the valve body shell (10), and an L-shaped liquid discharge pipe (12) communicated with the bottom of the valve body shell (10), and is characterized in that a liquid discharge opening and closing device (20) is arranged in the valve body shell (10), the liquid discharge opening and closing device (20) comprises a positioning pipe (21) with the top connected with the top of the inner wall of the valve body shell (10), a lifting pipe (22) which is connected with the inner wall of the positioning pipe (21) in a sliding manner and the bottom end of the lifting pipe extends to the lower part of the positioning pipe (21), a sealing part (23) which is arranged at the bottom of the lifting pipe (22) and used for sealing the L-shaped liquid discharge pipe (12), and an elastic extension part (24) with the top end and the bottom end respectively sleeved on the side wall of the positioning pipe (21) and the side wall of the lifting pipe (22);
The water level detection device (30) is arranged in the lifting pipe (22), the water level detection device (30) comprises a filtering water inlet component (31) which is arranged on the side wall of the lifting pipe (22) and is positioned between the elastic extension component (24) and the sealing component (23), a lifting air lock component (32) which is arranged on the side wall of the lifting pipe (22) and covers the outside of the filtering water inlet component (31), a buoyancy component (33) which is arranged on the inner wall of the lifting pipe (22) and the top end of which extends into the positioning pipe (21), and a distance measuring component (34) which is arranged on the top of the inner wall of the positioning pipe (21);
The utility model discloses a valve body, including L shape fluid-discharge tube (12), electric opening device (40) that the execution end extends to in L shape fluid-discharge tube (12) are equipped with to L shape fluid-discharge tube (12), electric opening device (40) are used for when distance measurement part (34) measuring distance value of buoyancy part (33) is less than the setting value, move sealing part (23) upward, buoyancy part (33) are including locating riser (22) inner wall just are located spacing boss (331) on filtration water inlet part (31) upper portion, bushing (332) of bottom contact spacing boss (331), locate annular gasbag (333) on bushing (332), locate plunger board (334) on annular gasbag (333), locate plunger board (334) top just extends to connecting rod (335) in positioning tube (21), and locate distance measurement board (336) on connecting rod (335) top, riser (22) top intercommunication trachea (337) bottom, trachea (337) top intercommunication valve body housing (10) inner wall top.
2. The electric valve for steam turbine main steam drainage according to claim 1, wherein a plurality of anti-rotation bosses (221) are arranged on the side wall of the lifting tube (22) in an annular array, and anti-rotation grooves (211) matched with the anti-rotation bosses (221) are formed in the inner wall of the positioning tube (21).
3. The electric valve for steam turbine main steam drain according to claim 1, wherein the sealing member (23) comprises a circular truncated cone-shaped sealing block (231) provided at the bottom of the lifting pipe (22), and a sealing inclined surface (232) provided on the inner wall of the L-shaped liquid discharge pipe (12) and engaged with the circular truncated cone-shaped sealing block (231).
4. The electric valve for steam turbine main steam drainage according to claim 1, wherein the elastic extension part (24) comprises a corrugated outer sleeve (241) sleeved on the side wall of the positioning pipe (21) and the side wall of the lifting pipe (22) at the top end and a gas tank (242) arranged on the top of the valve body shell (10), and the gas tank (242) is communicated with the corrugated outer sleeve (241) through a pipeline.
5. The electric valve for steam turbine main steam drainage according to claim 4, wherein an air pressure sensor (243) is provided on the inner wall of the corrugated outer sleeve (241), and the PLC controller receives the pressure data from the air pressure sensor (243) and opens the valve of the air tank (242) to allow the air flow to enter the corrugated outer sleeve (241) until the pressure data is consistent with the set value.
6. The electric valve for steam turbine main steam drainage according to claim 1, wherein the filtering water inlet part (31) comprises a plurality of water inlet holes (311) penetrating through the side wall of the lifting pipe (22), and a filtering ring (312) arranged on the outer wall of the lifting pipe (22) and sleeved outside the water inlet holes (311).
7. The electric valve for steam turbine main steam drainage according to claim 1, wherein the lifting airlock part (32) comprises an annular floating plate (321) sleeved on the outer wall of the lifting pipe (22), and an airlock cover pipe (322) arranged at the bottom of the annular floating plate (321) and covered outside the filtering water inlet part (31).
8. The electric valve for steam turbine main steam drainage according to claim 1, wherein the distance measuring component (34) comprises a distance sensor (341) arranged on the top of the inner wall of the positioning tube (21), and a limit sleeve (342) arranged on the top of the inner wall of the positioning tube (21) and sleeved outside the distance sensor (341), and the length of the limit sleeve (342) is larger than that of the distance sensor (341).
9. The electric valve for steam turbine main steam drainage according to claim 1, wherein the electric opening device (40) comprises a driving cylinder (41) arranged at the bottom of the L-shaped liquid discharge pipe (12), and an execution end of the driving cylinder (41) penetrates through the bottom of the L-shaped liquid discharge pipe (12) to be connected with a push rod (42).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111207711.2A CN113983345B (en) | 2021-10-18 | 2021-10-18 | Main steam drainage electric valve for steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111207711.2A CN113983345B (en) | 2021-10-18 | 2021-10-18 | Main steam drainage electric valve for steam turbine |
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| CN113983345A CN113983345A (en) | 2022-01-28 |
| CN113983345B true CN113983345B (en) | 2024-04-30 |
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| CN202111207711.2A Active CN113983345B (en) | 2021-10-18 | 2021-10-18 | Main steam drainage electric valve for steam turbine |
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| GB482058A (en) * | 1936-11-24 | 1938-03-23 | Waldo Mumford Bailey | Improvements in or relating to thermostatic steam traps |
| US3791578A (en) * | 1972-04-19 | 1974-02-12 | Yarway Corp | Pilot-operated steam traps |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113983345A (en) | 2022-01-28 |
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