CN112228571A - Subcritical 300MW steam turbine reheating regulating valve - Google Patents
Subcritical 300MW steam turbine reheating regulating valve Download PDFInfo
- Publication number
- CN112228571A CN112228571A CN202011231707.5A CN202011231707A CN112228571A CN 112228571 A CN112228571 A CN 112228571A CN 202011231707 A CN202011231707 A CN 202011231707A CN 112228571 A CN112228571 A CN 112228571A
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- Prior art keywords
- valve
- subcritical
- sleeve
- steam turbine
- regulating valve
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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
- F16K1/02—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 with screw-spindle
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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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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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
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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
- F16K1/44—Details of seats or valve members of double-seat valves
- F16K1/443—Details of seats or valve members of double-seat valves the seats being in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
- F16K1/487—Attaching valve members to screw-spindles by a fixing element extending in the axial direction of the spindle, e.g. a screw
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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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
A subcritical 300MW steam turbine reheating regulating valve. The invention relates to the technical field of steam turbines. The invention aims to solve the problems of poor tightness and poor adjustability of the existing subcritical 300MW turbine reheating adjusting valve. The invention comprises a pre-opening valve, a locking nut, a valve rod, a medium-pressure regulating valve connecting sleeve, a valve disc, a valve cover, a valve seat, a valve body and a lining, wherein the lower end of the valve rod is fixedly connected with the pre-opening valve, the upper end of the pre-opening valve is fixedly connected with the locking nut, the upper end of the locking nut is provided with the connecting nut, the upper end of the pre-opening valve is provided with the medium-pressure regulating valve connecting sleeve, the medium-pressure regulating valve connecting sleeve is inserted into the valve disc, the middle part of the lower end surface of the valve disc is provided with a valve disc through hole, the pre-opening valve is arranged at the inner side end of the valve disc through hole, the lower end of the valve cover is provided with a circular ring sleeve, the circular ring sleeve is arranged in the valve body, the steam. The invention is used for 300MW steam turbines.
Description
Technical Field
The invention relates to the technical field of steam turbines, in particular to a subcritical 300MW steam turbine reheating regulating valve.
Background
With the increasing development of industrial and agricultural industries in China, the requirements of the power industry on the steam turbine manufacturing industry are continuously improved, and the steam turbine develops towards high capacity, high parameter, low pollution, high reliability, high load adaptability, high automation degree, safety and economy. Modern large steam turbines generally adopt a structure with multiple stages, multiple cylinders and multiple steam exhausts; the cylinder adopts a structure of an inner layer cylinder, an outer layer cylinder or a multi-layer cylinder. The design of the steam turbine must select reasonable thermodynamic cycle, the through-flow part of the steam turbine should have good thermal and pneumatic characteristics, and the main part, the auxiliary part and the main parts of the steam turbine should have satisfactory strength and vibration characteristics, good automatic regulation performance and reasonable manufacturing process. However, the existing domestic subcritical 300MW steam turbine reheating regulating valve generally has the conditions of poor tightness and poor regulation performance.
Disclosure of Invention
The invention provides a subcritical 300MW turbine reheating regulating valve, aiming at solving the problems of poor tightness and poor regulation of the existing subcritical 300MW turbine reheating regulating valve.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention comprises a pre-opening valve, a locking nut, a valve rod, a medium-pressure regulating valve connecting sleeve, a valve disc, a valve cover, a valve seat, a valve body and a bush, wherein the valve rod is vertically inserted on the end surface of the valve cover, the lower end of the valve rod is fixedly connected with the pre-opening valve, the upper end of the pre-opening valve is fixedly connected with the locking nut, the upper end of the locking nut is provided with the connecting nut, the locking nut and the connecting nut are both arranged on the outer side of the lower end of the valve rod, the upper end of the pre-opening valve is provided with the medium-pressure regulating valve connecting sleeve, the upper end of the medium-pressure regulating valve connecting sleeve is sleeved on the outer side of the valve rod, the lower end of the medium-pressure regulating valve connecting sleeve is sleeved on the outer sides of the connecting nut and the locking nut, the medium-pressure regulating valve connecting sleeve is inserted in the valve disc, the middle part of the lower end surface of the, the inner circumferential side wall of the annular sleeve is provided with a lining, the upper end of the valve disc is inserted in the lining, the lower end of the butterfly valve is arranged in the valve seat, and the valve seat is fixedly connected with the root part of the inner side wall of the steam outlet end of the valve body.
The invention has the beneficial effects that:
the invention provides a subcritical 300MW steam turbine reheating regulating valve, which improves the tightness and the adjustability of the reheating regulating valve. Thereby ensuring the effective operation of the steam turbine, improving the working efficiency and simultaneously ensuring the service life of the steam turbine set.
Drawings
Fig. 1 is a front sectional view of the overall structure of the present invention.
Detailed Description
The first embodiment is as follows: with reference to fig. 1, the subcritical 300MW steam turbine reheating regulating valve according to this embodiment includes a pre-opening valve 1, a locking nut 4, a valve rod 5, a medium pressure regulating valve connecting sleeve 6, a valve disc 11, a valve cover 12, a valve seat 13, a valve body 14 and a bushing 15, the valve rod 5 is vertically inserted on an end surface of the valve cover 12, the lower end of the valve rod 5 is fixedly connected with the pre-opening valve 1, the upper end of the pre-opening valve 1 is fixedly connected with the locking nut 4, the upper end of the locking nut 4 is provided with a connecting nut 7, the locking nut 4 and the connecting nut 7 are both arranged on an outer side of a lower end of the valve rod 5, the upper end of the pre-opening valve 1 is provided with the medium pressure regulating valve connecting sleeve 6, the upper end of the medium pressure regulating valve connecting sleeve 6 is sleeved on an outer side of the valve rod 5, the lower end of the medium pressure regulating valve connecting sleeve 6 is sleeved on outer sides of the connecting nut 7, the pre-opening valve 1 is arranged at the inner side end of a through hole of a valve disc, the lower end of a valve cover 12 is provided with a circular ring sleeve, the circular ring sleeve is arranged in a valve body 14, the steam inlet end of the valve body 14 is arranged at one side of the circular ring sleeve, a lining 15 is arranged on the inner circumferential side wall of the circular ring sleeve, the upper end of the valve disc 11 is inserted in the lining 15, the lower end of a butterfly valve 11 is arranged in a valve seat 13, and the valve seat 13 is fixedly connected to the root of the inner side wall of the steam.
In the embodiment, the pre-opened valve 1 and the locking nut 4 are tightly screwed through threads after wrapping the valve rod 5, the pin 9 locks the pre-opened valve 1 and the locking nut 4 to prevent rotation, the connecting nut 7 is tightly screwed on the valve rod 5 through threads, the medium-pressure regulating valve connecting sleeve 6 penetrates through the valve rod 5 from top to bottom and is tightly screwed with the pin 3 through an excircle thread and a valve disc 11, the bushing 15 and the valve cover 12 are fixed through the pin 10, the mounting sleeve 2 and the valve cover 12 are assembled and then are caulked and fixed, the valve seat 13 is fixed with the valve body 14 through caulking, and the valve rod 5 penetrates through the mounting sleeve 2 from bottom to top and then is tightly screwed on the valve body 14 through the bolt by the valve cover 12.
The second embodiment is as follows: referring to fig. 1, in the present embodiment, an extension section extends outward from an outer circumferential sidewall of a lower end of the medium pressure regulating valve connecting sleeve 6, and an outer circumferential sidewall of the extension section is fixedly connected to an inner sidewall of the valve disc 11. Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: referring to fig. 1, a plurality of connecting sleeve through holes are uniformly distributed in the extending section in the circumferential direction in the present embodiment. Other components and connection modes are the same as those of the second embodiment.
The fourth concrete implementation mode: with reference to fig. 1, in the present embodiment, a plurality of circular sleeve through holes are uniformly distributed on the side wall of the circular sleeve along the circumferential direction, a plurality of bushing through holes are uniformly distributed on the side wall of the bushing 15 along the circumferential direction, each bushing through hole is respectively arranged in one-to-one correspondence with one circular sleeve through hole, and a gap is formed between the bushing 15 and the valve disc 11. The other components and the connection mode are the same as those of the first embodiment, the second embodiment or the third embodiment.
The fifth concrete implementation mode: with reference to fig. 1, in the present embodiment, a movable cavity is disposed on an inner side wall of the medium pressure regulating valve connecting sleeve 6 along a height direction, and the connecting nut 7 and the locking nut 4 are disposed in the movable cavity and can move along the height direction of the movable cavity. The other components and the connection mode are the same as those of the fourth embodiment.
The sixth specific implementation mode: referring to fig. 1, the intermediate pressure control valve connecting sleeve 6 according to the present embodiment is provided with a gap between the connecting nut 7 and the lock nut 4. The other components and the connection mode are the same as the fifth embodiment mode.
The seventh embodiment: referring to fig. 1, in the present embodiment, a mounting sleeve 2 is disposed between a valve stem 5 and a bonnet 12, an outer side wall of the mounting sleeve 2 is inserted into a middle portion of an upper end surface of the bonnet 12, and an inner side wall of the mounting sleeve 2 is fitted around an outer side of the valve stem 5. Other compositions and connection modes are the same as those of the first, second, third, fifth or sixth embodiment modes.
The specific implementation mode is eight: referring to fig. 1, the valve rod 5 of the present embodiment is provided with a thread on an outer circumferential side wall of an upper end thereof. The other components and the connection mode are the same as those of the seventh embodiment.
The screw thread on the valve rod 5 extends to the inboard of installation sleeve 2 among this embodiment, and the middle part of 2 lateral walls of installation sleeve is equipped with the annular along the circumferencial direction, and the inboard middle part of valve gap 12 is equipped with the gas leakage passageway along the horizontal direction, and the gas leakage passageway communicates with the annular of installation sleeve 2, and the stability of valve rod 5 at the governing valve during operation can be guaranteed to the screw thread of valve rod 5, can not take place to rock, guarantees simultaneously that the air current flows by the gas leakage passageway of valve gap 12, can not cause the interference in the governing valve.
The specific implementation method nine: referring to fig. 1, in the present embodiment, a strainer is fixed to the inner side of the valve body 14, and the strainer is fitted to the outer side of the circular sleeve. Other components and connection modes are the same as those of the first embodiment.
The detailed implementation mode is ten: referring to fig. 1, the coupling nut 7 and the valve stem 5 according to the present embodiment are fixedly coupled to each other by a screw 8. Other components and connection modes are the same as those of the first embodiment, the second embodiment, the third embodiment, the fifth embodiment, the sixth embodiment, the eighth embodiment or the ninth embodiment.
Principle of operation
Steam enters the main steam valve again through a steam inlet end on one side of the valve body 14 and enters the regulating valve chamber after passing through the filter screen, the steam enters a gap between the bushing 15 and the valve disc 11 from a ring sleeve through hole of the valve cover 12 and a bushing through hole of the bushing 15 and flows upwards into the valve disc 11, then the steam enters through a connecting sleeve through hole on the medium-pressure regulating valve connecting sleeve 6, a pre-opening valve chamber is formed in a surrounding area between the lower end surface of an extending section of the medium-pressure regulating valve connecting sleeve 6, the inner side wall of the valve disc 11, the upper end of the lower end surface of the valve disc 11 and the outer side wall of the pre-opening valve 1, and the steam enters the pre-opening valve chamber through the connecting sleeve through hole; when the valve rod 5 is pulled upwards, the pre-opening valve 1, the locking nut 4 and the connecting nut 7 move upwards and vertically together with the valve rod 5, a gap is separated between the pre-opening valve 1 and a valve disc through hole on the lower end face of a valve disc 11, the pre-opening valve 1 is opened, and steam flows out of the reheating regulating valve through the valve disc through hole; when the valve rod 5 is continuously pulled, the pre-opening valve 1, the locking nut 4 and the connecting nut 7 continuously move upwards and vertically along with the valve rod 5, when the connecting nut 7 reaches the highest position of the movable containing cavity, the valve rod 5 is continuously pulled, the connecting nut 7 supports the connecting sleeve 6 of the medium-pressure regulating valve, the valve disc 11 moves upwards and is separated from the valve seat 13, the valve disc 11 is opened, steam after the main steam valve is reheated directly exhausts the reheat regulating valve through the steam outlet end at the lower end of the valve body 14, the adjustability of the reheat regulating valve is improved in such a two-section opening mode, when the valve rod 5 is pressed downwards, the lower end face of the pre-opening valve 1 abuts against the inner side end of the through hole of the valve disc, when the valve disc 11 abuts against the valve seat 13, the pre-opening valve 1 and the valve disc 11 are closed, steam cannot flow.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. The utility model provides a subcritical 300MW steam turbine reheat governing valve which characterized in that: the subcritical 300MW steam turbine reheating regulating valve comprises a pre-opening valve (1), a locking nut (4), a valve rod (5), a medium-pressure regulating valve connecting sleeve (6), a valve disc (11), a valve cover (12), a valve seat (13), a valve body (14) and a bushing (15), wherein the valve rod (5) is vertically inserted on the end surface of the valve cover (12), the lower end of the valve rod (5) is fixedly connected with the pre-opening valve (1), the upper end of the pre-opening valve (1) is fixedly connected with the locking nut (4), the upper end of the locking nut (4) is provided with the connecting nut (7), the locking nut (4) and the connecting nut (7) are both arranged on the outer side of the lower end of the valve rod (5), the upper end of the pre-opening valve (1) is provided with the medium-pressure regulating valve connecting sleeve (6), the upper end of the medium-pressure regulating valve connecting sleeve (6) is sleeved on the outer side of the valve rod (5), the lower end of the, medium-pressure adjusting valve connecting sleeve (6) cartridge is in valve disc (11), the middle part of terminal surface is equipped with the valve disc through-hole under valve disc (11), it sets up the medial extremity at the valve disc through-hole to open valve (1) in advance, the lower extreme of valve gap (12) is equipped with the ring cover, the ring cover sets up in valve body (14), the steam inlet end of valve body (14) sets up the one side at the ring cover, be equipped with bush (15) on the interior circumference lateral wall of ring cover, the upper end cartridge of valve disc (11) is in bush (15), the lower extreme setting of butterfly valve (11) is in disk seat (13), disk seat (13) rigid coupling is at the root of valve body (14) play steam end inside wall.
2. The subcritical 300MW steam turbine reheat regulating valve according to claim 1, wherein: the outer circumferential side wall of the lower end of the medium-pressure regulating valve connecting sleeve (6) extends outwards to form an extension section, and the outer circumferential side wall of the extension section is fixedly connected with the inner side wall of the valve disc (11).
3. The subcritical 300MW steam turbine reheat regulation valve of claim 2, wherein: a plurality of connecting sleeve through holes are uniformly distributed in the extending section along the circumferential direction.
4. The subcritical 300MW turbine reheat regulation valve of claim 1, 2 or 3, wherein: a plurality of circular ring sleeve through holes are uniformly distributed in the side wall of the circular ring sleeve along the circumferential direction, a plurality of lining through holes are uniformly distributed in the side wall of the lining (15) along the circumferential direction, each lining through hole is respectively arranged in one-to-one correspondence with one circular ring sleeve through hole, and a gap is formed between the lining (15) and the valve disc (11).
5. The subcritical 300MW steam turbine reheat regulating valve according to claim 4, wherein: a movable accommodating cavity is formed in the inner side wall of the medium-pressure regulating valve connecting sleeve (6) in the height direction, and the connecting nut (7) and the locking nut (4) are arranged in the movable accommodating cavity and can move in the height direction of the movable accommodating cavity.
6. The subcritical 300MW steam turbine reheat regulating valve according to claim 5, wherein: gaps are arranged among the medium-pressure regulating valve connecting sleeve (6), the connecting nut (7) and the locking nut (4).
7. The subcritical 300MW turbine reheat regulation valve of claim 1, 2, 3, 5 or 6, wherein: be equipped with between valve rod (5) and valve gap (12) installation sleeve (2), the middle part of the lateral wall cartridge of installation sleeve (2) at valve gap (12) up end, the inside wall suit of installation sleeve (2) is in the outside of valve rod (5).
8. The subcritical 300MW steam turbine reheat regulation valve of claim 7, wherein: and the outer circumferential side wall of the upper end of the valve rod (5) is provided with threads.
9. The subcritical 300MW steam turbine reheat regulating valve according to claim 1, wherein: the inner side of the valve body (14) is fixedly connected with a filter screen, and the filter screen is sleeved on the outer side of the circular ring sleeve.
10. The subcritical 300MW steam turbine reheat regulation valve of claims 1, 2, 3, 5, 6, 8 or 9, wherein: the connecting nut (7) is fixedly connected with the valve rod (5) through a screw (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011231707.5A CN112228571A (en) | 2020-11-06 | 2020-11-06 | Subcritical 300MW steam turbine reheating regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011231707.5A CN112228571A (en) | 2020-11-06 | 2020-11-06 | Subcritical 300MW steam turbine reheating regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112228571A true CN112228571A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011231707.5A Pending CN112228571A (en) | 2020-11-06 | 2020-11-06 | Subcritical 300MW steam turbine reheating regulating valve |
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| CN (1) | CN112228571A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236789A (en) * | 2021-04-30 | 2021-08-10 | 华能海南发电股份有限公司东方电厂 | Prevent steam turbine governing valve rod structure that splits |
-
2020
- 2020-11-06 CN CN202011231707.5A patent/CN112228571A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236789A (en) * | 2021-04-30 | 2021-08-10 | 华能海南发电股份有限公司东方电厂 | Prevent steam turbine governing valve rod structure that splits |
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