CN115853605A - Steam turbine industry steam extraction regulating valve - Google Patents
Steam turbine industry steam extraction regulating valve Download PDFInfo
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- CN115853605A CN115853605A CN202211527149.6A CN202211527149A CN115853605A CN 115853605 A CN115853605 A CN 115853605A CN 202211527149 A CN202211527149 A CN 202211527149A CN 115853605 A CN115853605 A CN 115853605A
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- 238000000605 extraction Methods 0.000 title claims abstract description 123
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 48
- 238000007789 sealing Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the technical field of steam extraction and heat supply of a steam turbine, in particular to an industrial steam extraction regulating valve of the steam turbine. According to the steam turbine steam exhaust regulating valve, steam can be supplied to the outside while steam pressure is regulated by improving the structure of the steam exhaust regulating valve, and special steam exhaust treatment is not required to be performed on the cylinder structure, so that the convenience and rapidness of steam exhaust of the steam turbine are improved, and the arrangement of the steam turbine are more convenient and flexible.
Description
Technical Field
The invention relates to the technical field of steam extraction and heat supply of a steam turbine, in particular to an industrial steam extraction regulating valve of the steam turbine.
Background
Cogeneration turbines are common industrial plants that can provide both steam and electricity for production. In the current mainstream design, an industrial steam extraction regulating valve is mostly adopted to regulate steam extraction when the steam extraction pressure is higher than 2.0mpa.
The existing industrial steam extraction regulating valve only plays a role in regulating steam extraction pressure, and steam is supplied out through a steam extraction port arranged on a cylinder. The extraction opening is generally arranged at the lower part of the cylinder, and the steam turbine needs to be arranged on a higher platform in order to facilitate the arrangement of a pipeline below. The mode makes the cylinder structure complex and the processing amount large; and when the steam turbine was arranged for 0 meters, just need to arrange the steam extraction pipeline at the below pit of 0 meters layer, increased civil engineering work load, and the pipeline makes the maintenance of later stage in the pit inconvenient.
Therefore, the existing steam extraction regulating valve in the steam turbine industry needs to be optimized and improved, steam needs to be conveniently discharged while the extraction pressure is regulated, and the layout flexibility of a steam turbine is improved. Therefore, a more reasonable technical scheme needs to be provided to solve the technical problems in the prior art.
Disclosure of Invention
At least in order to overcome one of the defects mentioned above, the invention provides a steam extraction regulating valve in the steam turbine industry, which can adjust the extraction pressure and discharge steam at the same time by improving the extraction of steam, thereby facilitating the flexible layout of the steam turbine and improving the convenience of use and maintenance of the steam turbine.
In order to achieve the purpose, the steam extraction regulating valve disclosed by the invention can adopt the following technical scheme:
the utility model provides a steam turbine industry extraction governing valve, includes the casing and sets up the adjusting valve core subassembly on the casing, the casing lateral part be provided with the steam extraction structure.
According to the steam extraction regulating valve, the steam extraction structure is arranged on the side part of the shell, so that the steam turbine is convenient to install and arrange, and the steam extraction regulating valve is suitable for an axial steam extraction unit, a lateral steam extraction unit and the like; meanwhile, steam extraction can be realized without arranging a steam extraction port on the cylinder, and the steam extraction regulating valve realizes steam supply while regulating pressure, and has the advantages of simple structure and flexible and convenient use. The method can be applied to the condition that the existing partial straight condensing unit is changed into an extraction unit, so that the application range is wide.
Further, the structure of the housing used in the present invention is not limited, and is optimized and one of the possible options is: the steam-extraction structure is characterized in that a steam-facing cavity and a steam-backing cavity are formed in the shell, the volume of the steam-facing cavity is 2-4 times that of the steam-backing cavity, and the steam-extraction structure is arranged on the steam-facing cavity. When the scheme is adopted, the effect of reducing steam flow shock excitation can be achieved, and the situations of eccentricity and shaking of the valve rod are reduced.
Further, in the present invention, in order to make the steam extraction structure more stable and reliable when supplying steam, the setting angle of the steam extraction structure is optimized and the feasible options are shown: the steam extraction structure comprises a steam extraction channel which is obliquely and upwards arranged, and the extending direction of the steam extraction channel and the axis of the regulating valve core assembly form an included angle of 30-60 degrees. When the scheme is adopted, steam flow entering from the lower part of the shell is easier to discharge from the steam extraction channel, the turning of the air flow is avoided, the local stress is reduced, and the durability of the shell is higher.
Further, in order to facilitate the configuration of the steam extraction passage, the structure of the steam extraction passage is optimized and one feasible option is provided as follows: the steam extraction passage forms a stepped counter bore at the inner surface of the shell. When the scheme is adopted, the stepped counter bore can be used for arranging a part of sealing connection structures, and the steam extraction channel is convenient to open and close.
Further, in order to improve the steam supply effect of the steam extraction structure, the local pressure caused by the overhigh flow velocity of the air flow in the shell is avoided to be overlarge, and the local pressure is optimized and one of the feasible options is provided: the steam extraction device is characterized in that a flow guide structure is arranged in the shell, the flow guide structure comprises a flow guide plate which extends along the direction of the inner surface of the shell and shields the steam extraction structure, and an air gap is formed between the flow guide plate and the inner surface of the shell so that steam can be discharged from the steam extraction structure after passing through the air gap. When the scheme is adopted, the steam entering the steam facing flow cavity is firstly guided by the flow guide structure and cannot directly enter the steam extraction structure, and after the steam is guided by the flow guide structure, the steam in the steam facing flow cavity can enter the steam extraction channel only by appropriate steering so as to be discharged, so that the effect of slowly releasing the steam pressure is achieved.
Still further, in order to improve the effect of water conservancy diversion, here optimizes the structure of guide plate and shows one of them feasible selection: the distance between the edges of the two sides of the guide plate and the nearest edge of the steam extraction structure is at least 10cm, the distance between the edge of the upper side of the guide plate and the nearest edge of the steam extraction structure is at least 20cm, and the distance between the edge of the lower side of the guide plate and the bottom of the shell is 20-30 cm. When adopting such scheme, the guide plate covers the steam extraction channel completely, and the steam flow rate that gets into the steam extraction channel slows down relatively, consequently can reduce the steam flow rate and the pressure of steam extraction channel department.
In the present invention, the regulating valve core assembly on the housing is used as a component for regulating the extraction pressure, and the arrangement mode is not limited uniquely, and is optimized and one of the feasible options is shown as follows: the casing on be provided with the case chamber, adjust the valve core subassembly and set up in the case intracavity. When adopting such scheme, the vertical setting in case chamber makes the regulation case subassembly keep vertical connection and vertical flexible regulation.
Furthermore, the invention optimizes the structure of the regulating valve core assembly and provides one feasible option: the regulating valve core assembly comprises a valve rod movably arranged in a valve core cavity, and a valve disc is arranged at the lower end of the valve rod.
Still further, its sealing performance is considered when setting up the valve rod, avoids appearing the condition of leaking vapour, optimizes here and draws one of them feasible selection: and a sealing sleeve and a sleeve are further sleeved between the valve rod and the valve core cavity. When the scheme is adopted, the sealing sleeve is attached to the surface of the valve rod, the sleeve is attached to the inner surface of the valve core cavity, the sealing sleeve structure and the valve rod structure can keep the movement of the valve rod, meanwhile, certain sealing can be carried out, and steam leakage is reduced.
Further, in the present invention, a structure matching with the spool cavity is also provided on the housing, which is optimized specifically to give one of the possible options: the shell is further provided with an adjusting channel, the adjusting channel is communicated with the valve core cavity, the valve rod is communicated with the adjusting channel and the cavity in the shell when in an opening position, and the valve rod is cut off from the adjusting channel and the cavity in the shell when in a closing position.
Compared with the prior art, the technical scheme disclosed by the invention has the following partial beneficial effects:
the steam extraction regulating valve structure is improved, so that steam can be supplied to the outside while steam pressure is regulated, and the cylinder structure does not need to be perforated for special steam exhaust treatment, so that the convenience degree of steam exhaust of the steam turbine is improved, and the arrangement of the steam turbine is more convenient and flexible.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a regulator valve according to the present invention.
Fig. 2 is an enlarged view of a portion of a structure shown in fig. 1.
In the above drawings, the meaning of each reference numeral is:
1. a housing; 101. a spool cavity; 2. a steam extraction structure; 3. a sleeve; 4. a valve stem; 5. adjusting the channel; 6. sealing sleeves; 7. a valve disc; 8. a baffle.
Detailed Description
The invention is further explained below with reference to the drawings and the specific embodiments.
Aiming at the condition that the steam pressure regulation can only be realized by the existing industrial steam extraction regulating valve and the steam emission can only be carried out through the cylinder opening, the following embodiment carries out optimization regulation, realizes the steam pressure regulation by utilizing the industrial steam extraction valve and can also realize external steam supply so as to solve the problem of inconvenient steam exhaust of the cylinder opening and solve the problems of complex structure and inflexible arrangement of the steam turbine.
Examples
As shown in fig. 1 and fig. 2, the present embodiment provides a steam extraction regulating valve for steam turbine industry, which includes a casing 1 and a regulating valve core assembly disposed on the casing 1, wherein a steam extraction structure 2 is disposed on a side portion of the casing 1.
Preferably, the casing 1 is made of ZG15Cr2Mo1 or similar materials, and the steam extraction structure 2 is integrally formed with the casing 1.
According to the steam extraction regulating valve disclosed by the embodiment, the steam extraction structure 2 is arranged on the side part of the shell 1, so that the steam turbine is convenient to install and arrange and is suitable for an axial steam extraction unit, a lateral steam extraction unit and the like; meanwhile, steam extraction can be realized without arranging a steam extraction port on the cylinder, and the steam extraction regulating valve realizes steam supply while regulating pressure, and has the advantages of simple structure and flexible and convenient use. The method can be applied to the condition that the existing partial straight condensing unit is changed into a steam extraction unit, so that the application range is wide.
The structure of the housing 1 applied in the present embodiment is not limited uniquely, and the present embodiment is optimized and adopts one of the feasible options: a steam-facing cavity and a steam-back cavity are formed in the shell 1, the volume of the steam-facing cavity is 2-4 times that of the steam-back cavity, and the steam extraction structure 2 is arranged on the steam-facing cavity. When the scheme is adopted, the effect of reducing steam flow shock excitation can be achieved, and the situation that the valve rod 4 is eccentric and shakes is reduced.
Preferably, in this embodiment, the volume of the steam inlet chamber is 3 times of the volume of the steam back chamber.
In the present embodiment, in order to make the steam extraction structure 2 more stable and reliable when supplying steam, the setting angle of the steam extraction structure 2 is optimized and the feasible options are adopted: the steam extraction structure 2 comprises a steam extraction channel which is obliquely and upwards arranged, and the extending direction of the steam extraction channel and the axis of the regulating valve core assembly form an included angle of 30-60 degrees. When the scheme is adopted, steam flow entering from the lower part of the shell 1 is easier to be discharged from the steam extraction channel, the turning of the air flow is avoided, the local stress is reduced, and the durability of the shell 1 is higher.
Preferably, the axis of the regulating valve core assembly is vertical, and in the embodiment, the steam extraction channel forms an included angle of 45 degrees with the axis of the regulating valve core assembly.
Preferably, as shown in fig. 2, the steam extraction channel forms a welding groove on the outer surface of the shell 1, so as to be conveniently connected with an external pipeline; when the steam extraction channel is connected with an external pipeline, the steam extraction channel is connected by means of arc welding and the like.
In order to facilitate the configuration of the steam extraction channel, the structure of the steam extraction channel is optimized and one feasible choice is adopted as follows: the steam extraction channel forms a stepped counter bore at the inner surface of the shell 1. When the scheme is adopted, the stepped counter bore can be used for arranging a part of sealing connection structures, so that the steam extraction channel can be conveniently opened and closed.
In order to improve the steam supply effect of the steam extraction structure 2 and avoid the excessive local pressure caused by the excessive flow velocity of the air flow in the casing 1, the present embodiment is optimized and adopts one of the feasible options: the steam extraction device is characterized in that a flow guide structure is arranged in the shell 1, the flow guide structure comprises a flow guide plate 8 which extends along the direction of the inner surface of the shell 1 and shields the steam extraction structure 2, and an air gap is formed between the flow guide plate 8 and the inner surface of the shell 1 so that steam can be discharged from the steam extraction structure 2 after passing through the air gap. When the scheme is adopted, the steam entering the steam-facing flow cavity is firstly guided by the flow guide structure and cannot directly enter the steam extraction structure 2, and after the steam is guided by the flow guide structure, the steam in the steam-facing flow cavity can enter the steam extraction channel only by properly turning, so that the steam is discharged, and the effect of slowly releasing the steam pressure is achieved.
Preferably, the deflector 8 is fixedly connected with the shell 1 through a connecting rib and is made of 12Cr2Mo1R or similar materials.
The guide plate 8 is arranged to be used for homogenizing the flow field in the shell 1, so that the flow field disorder in the shell 1 caused by a steam extraction channel structure is avoided.
In order to improve the flow guiding effect, the present embodiment optimizes the structure of the flow guiding plate 8 and provides one of the feasible options: the distance between the edges of the two sides of the guide plate 8 and the nearest edge of the steam extraction structure 2 is at least 10cm, the distance between the edge of the upper side of the guide plate 8 and the nearest edge of the steam extraction structure 2 is at least 20cm, and the distance between the edge of the lower side of the guide plate 8 and the bottom of the shell 1 is 20-30 cm. When the scheme is adopted, the guide plate 8 completely covers the steam extraction channel, and the flow rate of steam entering the steam extraction channel is relatively reduced, so that the flow rate and the pressure of the steam at the steam extraction channel can be reduced.
The regulating valve core assembly on the housing 1 is used as a component for regulating the steam extraction pressure, the arrangement mode is not limited uniquely, and the embodiment is optimized and adopts one of the feasible options: the shell 1 is provided with a valve core cavity 101, and the adjusting valve core assembly is arranged in the valve core cavity 101. When the scheme is adopted, the valve core cavity 101 is vertically arranged, so that the adjusting valve core assembly is kept vertically connected and vertically telescopically adjusted.
The present embodiment optimizes the structure of the regulating valve core assembly and adopts one of the feasible options: the regulating valve core assembly comprises a valve rod 4 movably arranged in a valve core cavity 101, and a valve disc 7 is arranged at the lower end of the valve rod 4.
Preferably, valve rod 4 is made of 2Cr12NiMo1W1V or similar material, and valve disc 7 is made of 20Cr3MoWV or similar material.
The sealing performance of the valve rod 4 is considered when the valve rod is arranged, the steam leakage is avoided, and the embodiment is optimized and adopts one feasible choice: and a sealing sleeve 6 and a sleeve 3 are further sleeved between the valve rod 4 and the valve core cavity 101. When adopting such scheme, seal cover 6 laminates in the surface of valve rod 4, and sleeve 3 laminates in case chamber 101 internal surface, and 6 structures of seal cover and 4 structures of valve rod can keep the activity of valve rod 4, can carry out certain sealed simultaneously again, reduce the steam leakage.
Preferably, the sealing sleeve 6 is made of 20Cr3MoWV or similar material, and the sleeve 3 is made of 38CrMoAl or similar material.
In this embodiment, the housing 1 is also provided with a structure matching with the spool cavity 101, which is specifically optimized to adopt one of the feasible options: the valve core structure is characterized in that the shell 1 is also provided with an adjusting channel 5, the adjusting channel 5 is communicated with the valve core cavity 101, the valve rod 4 is communicated with the adjusting channel 5 and a cavity in the shell 1 when in an opening position, and the valve rod 4 is cut off from the adjusting channel 5 and the cavity in the shell 1 when in a closing position.
The steam turbine industrial steam extraction regulating valve provided by the embodiment is arranged at the top of a steam turbine cylinder, and the steam extraction pressure is controlled by regulating the valve position of a valve disc 7; the industrial steam extraction pipeline is connected with the steam extraction port in a welding mode, so that the functions of steam extraction pressure adjustment and external steam supply are realized simultaneously.
The above embodiments are just exemplified in the present embodiment, but the present embodiment is not limited to the above alternative embodiments, and those skilled in the art can obtain other various embodiments by arbitrarily combining with each other according to the above embodiments, and any other various embodiments can be obtained by anyone in light of the present embodiment. The above detailed description should not be construed as limiting the scope of the present embodiments, which should be defined in the appended claims.
Claims (10)
1. The utility model provides a steam turbine industry extraction governing valve which characterized in that: the steam exhaust valve comprises a shell (1) and a regulating valve core assembly arranged on the shell (1), wherein a steam exhaust structure (2) is arranged on the side of the shell (1).
2. The steam extraction regulating valve for the steam turbine industry as recited in claim 1, wherein: a steam-facing chamber and a steam-back chamber are formed in the shell (1), the volume of the steam-facing chamber is 2-4 times that of the steam-back chamber, and the steam extraction structure (2) is arranged on the steam-facing chamber.
3. The steam turbine industrial extraction control valve according to claim 1 or 2, characterized in that: the steam extraction structure (2) comprises a steam extraction channel which is obliquely and upwards arranged, and the extending direction of the steam extraction channel and the axis of the regulating valve core assembly form an included angle of 30-60 degrees.
4. The steam turbine industrial extraction control valve of claim 3, wherein: the steam extraction channel forms a stepped counter bore on the inner surface of the shell (1).
5. The steam turbine industrial extraction control valve according to claim 1 or 2, characterized in that: the steam extraction device is characterized in that a flow guide structure is arranged in the shell (1), the flow guide structure comprises a flow guide plate (8) which extends along the direction of the inner surface of the shell (1) and shields the steam extraction structure (2), and an air gap is formed between the flow guide plate (8) and the inner surface of the shell (1) so that steam can be discharged from the steam extraction structure (2) after passing through the air gap.
6. The steam extraction regulating valve for the steam turbine industry as recited in claim 5, wherein: the distance between the edges of the two sides of the guide plate (8) and the nearest edge of the steam extraction structure (2) is at least 10cm, the distance between the edge of the upper side of the guide plate (8) and the nearest edge of the steam extraction structure (2) is at least 20cm, and the distance between the edge of the lower side of the guide plate (8) and the bottom of the shell (1) is 20-30 cm.
7. The steam turbine industrial extraction control valve of claim 1, wherein: the valve core adjusting device is characterized in that a valve core cavity (101) is arranged on the shell (1), and the valve core assembly is arranged in the valve core cavity (101).
8. The steam extraction regulating valve for the steam turbine industry as recited in claim 7, wherein: the regulating valve core assembly comprises a valve rod (4) movably arranged in a valve core cavity (101), and a valve disc (7) is arranged at the lower end of the valve rod (4).
9. The steam extraction regulating valve for the steam turbine industry as recited in claim 8, wherein: a sealing sleeve (6) and a sleeve (3) are further sleeved between the valve rod (4) and the valve core cavity (101).
10. The steam turbine industrial extraction regulating valve as recited in any one of claims 7 to 9, wherein: the valve is characterized in that the shell (1) is further provided with an adjusting channel (5), the adjusting channel (5) is communicated with the valve core cavity (101), the valve rod (4) is communicated with the adjusting channel (5) and a cavity in the shell (1) when in an opening position, and the valve rod (4) is cut off from the adjusting channel (5) and the cavity in the shell (1) when in a closing position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211527149.6A CN115853605B (en) | 2022-12-01 | 2022-12-01 | Industrial steam extraction regulating valve of steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211527149.6A CN115853605B (en) | 2022-12-01 | 2022-12-01 | Industrial steam extraction regulating valve of steam turbine |
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| CN115853605A true CN115853605A (en) | 2023-03-28 |
| CN115853605B CN115853605B (en) | 2024-06-14 |
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| CN115853605B (en) | 2024-06-14 |
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