CN220037472U - Bypass needle valve for spherical valve of pumped storage hydropower station - Google Patents
Bypass needle valve for spherical valve of pumped storage hydropower station Download PDFInfo
- Publication number
- CN220037472U CN220037472U CN202320903197.4U CN202320903197U CN220037472U CN 220037472 U CN220037472 U CN 220037472U CN 202320903197 U CN202320903197 U CN 202320903197U CN 220037472 U CN220037472 U CN 220037472U
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- valve
- sealing
- clack
- ring
- valve rod
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- 238000007789 sealing Methods 0.000 claims abstract description 117
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000004146 energy storage Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 12
- 239000000945 filler Substances 0.000 abstract description 11
- 238000005299 abrasion Methods 0.000 abstract description 7
- 230000003628 erosive effect Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000003872 anastomosis Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The utility model relates to a bypass needle valve for a spherical valve of a pumped storage hydropower station, which comprises a valve body, a valve seat, a valve clack and a valve rod, wherein the second end of the valve body is in sealing connection with a valve rod driving structure; the valve clack and the valve clack guiding structure are arranged in clearance fit; the valve clack and the valve rod are connected by a plurality of steel balls, so that the valve clack is automatically aligned and sealed on the valve seat. The valve flap guide structure solves the problems that the valve flap is subjected to unbalanced medium force and the valve rod is subjected to lateral force in the using process of the bypass needle valve for the spherical valve of the conventional hydropower station, so that the valve rod moves to generate deflection, the filler is subjected to uneven abrasion due to unbalanced force, the valve flap is subjected to uneven erosive abrasion and the like, and the reliability of the valve is improved.
Description
Technical Field
The utility model relates to the technical field of bypass needle valves, in particular to a bypass needle valve for a spherical valve of a pumped storage hydropower station.
Background
The bypass needle valve is used as an important accessory of the water inlet spherical valve of important equipment of the pumped storage power station, the water inlet spherical valve is mainly used for conducting and cutting off water flow of the unit, the bypass needle valve is mainly used for balancing pressure difference between the upper and lower sides of the water inlet spherical valve, the operation conditions of the pumped storage unit are more, all the conditions are alternately operated, the main water inlet spherical valve is frequent in action, and the bypass needle valve is frequent in action, so that compared with a conventional hydropower station, the bypass needle valve of the main water inlet spherical valve of the pumped storage power station is easier to break down. Once the bypass needle valve fails, the operation of the main water inlet spherical valve is affected, so that the whole unit cannot normally operate, and the safety and stability of the whole power grid are even affected.
At present, the bypass needle valve for the spherical valve of the traditional hydropower station is of an angle type stop valve structure, as shown in fig. 8, a valve rod 4 is of a conical valve clack, a valve clack 2 and the valve rod 4 are connected by adopting a valve clack cover, the valve rod adopts a packing sealing structure, and the seal between a valve body 1 and a base adopts a gasket for sealing, so that the structure has the following defects: because the valve clack does not have the guide structure, the valve clack receives unbalanced force easily under the medium force, and in the valve opening and closing process, because the valve clack receives the unbalanced force of medium, the valve rod motion in-process produces the skew easily, produces inhomogeneous effort to the filler, leads to the filler to produce inhomogeneous wearing and tearing, causes the leakage at filler position, in addition, the valve clack receives unbalanced force and also can lead to the medium force to produce inhomogeneous erosion to the valve clack, produces inhomogeneous erosive wear to the sealed face of valve clack. In addition, the gasket seal is not reliable once the valve is subjected to vibration, resulting in failure of the pressure boundary.
Therefore, the inventor provides a bypass needle valve for a spherical valve of a pumped storage hydropower station by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The utility model aims to provide a bypass needle valve for a pumped storage hydropower station spherical valve, which solves the problems that a valve clack receives unbalanced force of a medium, a valve rod receives lateral force to cause deviation in the movement process of the valve rod, uneven abrasion of a filler is generated due to unbalanced force, uneven erosive abrasion of the valve clack and the like in the use process of the bypass needle valve for the conventional hydropower station spherical valve through a valve clack guide structure, and improves the reliability of the valve.
The utility model aims to achieve the purpose, the bypass needle valve for the pumped storage hydropower station spherical valve comprises a valve body, a valve seat, a valve clack and a valve rod, wherein the first end of the valve body is used for being communicated with the hydropower station spherical valve, the second end of the valve body is in sealing connection with a valve rod driving structure, the first end of the valve rod is connected with the valve clack, the second end of the valve rod is connected with the valve rod driving structure, the valve clack guiding structure is further arranged in the valve body, the valve clack is slidably sleeved in the valve clack guiding structure, and the valve clack is seated on the valve seat or separated from the valve seat under the driving of the valve rod; the valve clack and the valve clack guide structure are arranged in clearance fit; the valve clack is connected with the valve rod through a plurality of steel balls, so that the valve clack is automatically aligned and sealed on the valve seat.
In a preferred embodiment of the utility model, the valve clack guiding structure is a sleeve with two axial ends fixedly connected with the valve body, and a plurality of radial through liquid inlets are arranged on the side wall of the sleeve.
In a preferred embodiment of the present utility model, the outer wall of the sleeve is provided with a variable diameter, and the outer diameter of the end of the sleeve, which is close to the valve rod driving structure, is larger than the outer diameter of the end of the sleeve, which is far away from the valve rod driving structure.
In a preferred embodiment of the present utility model, the valve rod driving structure includes a base, a hydraulic cylinder and a piston, wherein a first end of the piston is connected with the valve rod, the valve rod is slidably and sealingly inserted through the base, a first sealing structure is disposed between the valve rod and the base, a second sealing structure is disposed between the valve rod and the piston, and a third sealing structure is disposed between the valve flap guiding structure and the base and between the valve body.
In a preferred embodiment of the present utility model, the first sealing structure includes a first sealing ring groove disposed on the base, and two first sealing rings are disposed in the first sealing ring groove; the first sealing structure further comprises a first sinking groove arranged on the base, a first plug elastic energy storage sealing ring and a second plug elastic energy storage sealing ring are arranged in the first sinking groove, an opening of the first plug elastic energy storage sealing ring is arranged towards the valve clack direction, and an opening of the second plug elastic energy storage sealing ring is arranged towards the piston direction.
In a preferred embodiment of the present utility model, a retainer ring is disposed in the first seal ring groove at a side close to the piston.
In a preferred embodiment of the present utility model, a base cover is disposed at an end of the first sinking groove to prop against and fix the second pan plug elastic energy storage sealing ring.
In a preferred embodiment of the present utility model, the second sealing structure includes two second sealing rings disposed between the valve stem and the piston; the second sealing structure further comprises a second sinking groove arranged on the piston, a third floodplug elastic energy storage sealing ring is arranged in the second sinking groove, and an opening of the third floodplug elastic energy storage sealing ring is arranged towards the direction of the valve clack.
In a preferred embodiment of the utility model, the third sealing structure comprises a first radial sealing O-ring and a first end face sealing O-ring disposed between the base and the valve flap guiding structure; the third sealing structure further comprises a second radial sealing O-ring and a second end face sealing O-ring which are arranged between the valve clack guiding structure and the valve body.
In a preferred embodiment of the present utility model, the valve clack guiding structure is provided with a half dovetail groove, and the first end face sealing O-ring and the second end face sealing O-ring are clamped in the half dovetail groove.
From the above, the bypass needle valve for the spherical valve of the pumped storage hydropower station provided by the utility model has the following structure
The beneficial effects are that:
in the bypass needle valve for the spherical valve of the pumped storage hydropower station, the valve clack guide structure solves the problem that the valve clack is subjected to medium unbalanced force in the valve opening and closing process, so that the valve is stable to open and close; the valve clack guide structure indirectly solves the problem that the valve rod is offset due to lateral force in the opening and closing process of the valve, so that the valve rod operates stably; the valve clack guide structure indirectly solves the problem of uneven abrasion of the filler caused by the extrusion force of the valve rod due to deflection, and ensures the tightness of the filler; the valve clack guiding structure solves the problem that the valve clack is eroded and worn unevenly due to medium, and improves the sealing performance of the valve; the valve clack and the valve rod are connected by adopting a plurality of steel balls, and the valve clack is similar to the movable hinge of a universal joint, so that the valve clack can be automatically aligned to the valve seat, the anastomosis degree of a sealing pair is improved, and the sealing reliability of the valve is improved and promoted.
Drawings
The following drawings are only for purposes of illustration and explanation of the present utility model and are not intended to limit the scope of the utility model. Wherein:
fig. 1: the utility model relates to a structure diagram of a bypass needle valve for a spherical valve of a pumped storage hydropower station.
Fig. 2: an enlarged view of the position I in FIG. 1.
Fig. 3: an enlarged view at II in FIG. 1.
Fig. 4: an enlarged view at III in FIG. 1.
Fig. 5: is a schematic illustration of the valve flap guide structure of the present utility model.
Fig. 6: an enlarged view of A-A in fig. 5.
Fig. 7: an enlarged view of B-B in FIG. 5.
Fig. 8: is a structural diagram of a bypass needle valve in the prior art.
In the figure:
1. a valve body; 2. a valve flap; 3. a valve flap guide structure; 31. a liquid inlet hole; 32. a half dovetail groove; 4. a valve stem; 5. a base; 6. a piston; 7. a second seal ring; 8. a third general plug elastic energy storage sealing ring; 9. a base cover; 10. a first flood-plug elastic energy storage sealing ring; 11. a first seal ring; 12. a retainer ring; 13. a first end face seal O-ring; 14. a first radial seal O-ring; 15. a second radial seal O-ring; 16. a second end face sealing O-ring; 17. steel balls; 18. and a second general plug elastic energy storage sealing ring.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present utility model, a specific embodiment of the present utility model will be described with reference to the accompanying drawings.
The specific embodiments of the utility model described herein are for purposes of illustration only and are not to be construed as limiting the utility model in any way. Given the teachings of the present utility model, one of ordinary skill in the related art will contemplate any possible modification based on the present utility model, and such should be considered to be within the scope of the present utility model. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 7, the utility model provides a bypass needle valve for a spherical valve of a pumped storage hydropower station, which comprises a valve body 1, a valve seat, a valve clack 2 and a valve rod 4, wherein a first end of the valve body 1 is used for communicating the spherical valve of the hydropower station, a second end of the valve body 1 is in sealing connection with a valve rod driving structure, a first end of the valve rod 4 is connected with the valve clack 2, a second end of the valve rod 4 is connected with the valve rod driving structure, a valve clack guiding structure 3 is further arranged in the valve body 1, the valve clack 2 is sleeved in the valve clack guiding structure 3 in a sliding way, and the valve clack 2 is seated on the valve seat or separated from the valve seat under the driving of the valve rod 4; the valve clack 2 and the valve clack guiding structure 3 are arranged in clearance fit; in the opening and closing process of the valve clack 2, the valve clack guiding structure 3 plays a guiding role for the valve clack 2, so that the force of the medium acting on the valve clack is uniform and balanced.
The valve clack 2 and the valve rod 4 are connected by adopting a plurality of steel balls 17, so that the valve clack 2 is automatically aligned and seated on the valve seat, the connection of the steel balls 17 is similar to the movable hinge joint of a universal joint, the valve clack 2 can be automatically aligned with the sealing surface of the valve seat, and the sealing surface of the valve clack is self-adaptive to the sealing surface of the valve seat.
In the bypass needle valve for the spherical valve of the pumped storage hydropower station, the valve clack guide structure solves the problem that the valve clack is subjected to medium unbalanced force in the valve opening and closing process, so that the valve is stable to open and close; the valve clack guide structure indirectly solves the problem that the valve rod is offset due to lateral force in the opening and closing process of the valve, so that the valve rod operates stably; the valve clack guide structure indirectly solves the problem of uneven abrasion of the filler caused by the extrusion force of the valve rod due to deflection, and ensures the tightness of the filler; the valve clack guiding structure solves the problem that the valve clack is eroded and worn unevenly due to medium, and improves the sealing performance of the valve; the valve clack and the valve rod are connected by adopting a plurality of steel balls, and the valve clack is similar to the movable hinge of a universal joint, so that the valve clack can be automatically aligned to the valve seat, the anastomosis degree of a sealing pair is improved, and the sealing reliability of the valve is improved and promoted.
Further, as shown in fig. 1, 5, 6 and 7, the valve flap guiding structure 3 is a sleeve with two axial ends fixedly connected with the valve body 1, and a plurality of radially penetrating liquid inlet holes 31 are arranged on the side wall of the sleeve. The number and the aperture of the liquid inlet holes are calculated according to the flow requirement according to the aperture of the valve, and in one embodiment, the diameter of the liquid inlet holes 31 is 5mm.
Further, the outer wall of the sleeve is in a reducing arrangement, the outer diameter of one end of the sleeve, which is close to the valve rod driving structure, is larger than the outer diameter of one end of the sleeve, which is far away from the valve rod driving structure, and the sealing structure between the valve body 1 and the sleeve is mainly prevented from being scratched when the sleeve is installed. In one embodiment, the outer diameter of the end of the sleeve distal from the valve stem driver is 5-8mm smaller than the outer diameter of the end of the sleeve proximal to the valve stem driver.
Further, as shown in fig. 1, the valve rod driving structure comprises a base 5, a hydraulic cylinder and a piston 6, wherein a first end of the piston 6 is connected with the valve rod 4, the valve rod 4 is hermetically and slidably penetrated through the base 5, a first sealing structure is arranged between the valve rod 4 and the base 5, a second sealing structure is arranged between the valve rod 4 and the piston 6, and a third sealing structure is arranged between the valve clack guiding structure 3 and the base 5 as well as between the valve clack guiding structure and the valve body 1.
Further, as shown in fig. 3, the first sealing structure includes a first sealing ring groove provided on the base 5, and two first sealing rings 11 (O-rings) are provided in the first sealing ring groove; the first sealing structure further comprises a first sinking groove arranged on the base, a first flooded plug elastic energy storage sealing ring 10 and a second flooded plug elastic energy storage sealing ring 18 are arranged in the first sinking groove, an opening of the first flooded plug elastic energy storage sealing ring 10 is arranged towards the direction of the valve clack 2 (downwards in fig. 1), and an opening of the second flooded plug elastic energy storage sealing ring 18 is arranged towards the direction of the piston (upwards in fig. 1), namely, the 2 flooded plug elastic energy storage sealing rings adopt a back-to-back installation mode.
Further, as shown in fig. 3, a retainer ring 12 is disposed in the first seal groove on a side close to the valve flap. The retainer ring 12 effectively prevents the first sealing ring 11 (O-ring) from being squeezed into the gap between the valve rod 4 and the base 5 by the medium force, and ensures the sealing reliability of the first sealing ring 11 (O-ring).
Further, as shown in fig. 3, a base cover 9 is arranged at the end of the first sinking groove to prop against and fix a second pan plug elastic energy storage sealing ring 18.
The triple sealing structure of the double first sealing ring 11 (O-shaped ring) +the downward opening first general plug elastic energy storage sealing ring 10 improves the tightness between the base 5 and the valve rod 4 and effectively prevents medium water from entering the hydraulic cylinder. The triple sealing structure of the double first sealing ring 11 (O-shaped ring) +the second general plug elastic energy storage sealing ring with the upward opening improves the tightness between the base 5 and the valve rod 4 and effectively prevents hydraulic oil in the hydraulic cylinder from entering the valve cavity of the valve body.
Further, as shown in fig. 2, the second sealing structure includes two second sealing rings 7 (O-rings) provided between the valve stem 4 and the piston 6; the second sealing structure further comprises a second sinking groove arranged on the piston, a third floodplug elastic energy storage sealing ring 8 is arranged in the second sinking groove, and an opening of the third floodplug elastic energy storage sealing ring 8 is arranged towards the valve clack direction (downwards in fig. 1).
The triple sealing structure of the double second sealing ring 7 (O-shaped ring) +the third universal plug elastic energy storage sealing ring 8 improves the tightness between the piston 6 and the valve rod 4 and effectively prevents the leakage of hydraulic oil in the hydraulic cylinder.
Further, as shown in fig. 4, the third sealing structure comprises a first radial sealing O-ring 14 and a first end face sealing O-ring 13 arranged between the base 5 and the flap guiding structure 3; the third sealing structure further comprises a second radial sealing O-ring 15 and a second end sealing O-ring 16 arranged between the flap guiding structure 3 and the valve body 1. The third seal arrangement ensures the integrity of the pressure boundary of the valve in the event of vibration.
Further, as shown in fig. 5, a half dovetail groove 32 is arranged on the valve clack guiding structure 3, and the first end face sealing O-ring 13 and the second end face sealing O-ring 16 are clamped in the half dovetail groove 32, so that the installation of the O-rings is facilitated.
The valve clack guiding structure 3 and the valve body 1, the base 5 and the valve clack guiding structure 3 are sealed by double O-shaped rings, so that the sealing reliability is improved, and the valve clack guiding structure is particularly suitable for vibration occasions.
From the above, the bypass needle valve for the spherical valve of the pumped storage hydropower station provided by the utility model has the following structure
The beneficial effects are that:
in the bypass needle valve for the spherical valve of the pumped storage hydropower station, the valve clack guide structure solves the problem that the valve clack is subjected to medium unbalanced force in the valve opening and closing process, so that the valve is stable to open and close; the valve clack guide structure indirectly solves the problem that the valve rod is offset due to lateral force in the opening and closing process of the valve, so that the valve rod operates stably; the valve clack guide structure indirectly solves the problem of uneven abrasion of the filler caused by the extrusion force of the valve rod due to deflection, and ensures the tightness of the filler; the valve clack guiding structure solves the problem that the valve clack is eroded and worn unevenly due to medium, and improves the sealing performance of the valve; the valve clack and the valve rod are connected by adopting a plurality of steel balls, and the valve clack is similar to the movable hinge of a universal joint, so that the valve clack can be automatically aligned to the valve seat, the anastomosis degree of a sealing pair is improved, and the sealing reliability of the valve is improved and promoted.
The foregoing is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this utility model, and are intended to be within the scope of this utility model.
Claims (10)
1. The bypass needle valve for the pumped storage hydropower station spherical valve is characterized by comprising a valve body, a valve seat, a valve clack and a valve rod, wherein the first end of the valve body is used for being communicated with the hydropower station spherical valve, the second end of the valve body is in sealing connection with a valve rod driving structure, the first end of the valve rod is connected with the valve clack, the second end of the valve rod is connected with the valve rod driving structure, a valve clack guiding structure is further arranged in the valve body, the valve clack is slidably sleeved in the valve clack guiding structure, and the valve clack is driven by the valve rod to be seated on the valve seat or separated from the valve seat; the valve clack and the valve clack guide structure are arranged in clearance fit; the valve clack is connected with the valve rod through a plurality of steel balls, so that the valve clack is automatically aligned and sealed on the valve seat.
2. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 1,
the valve clack guide structure is a sleeve with two axial ends fixedly connected with the valve body, and a plurality of radial through liquid inlet holes are formed in the side wall of the sleeve.
3. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 2,
the outer wall of sleeve is the reducing setting, the sleeve is close to the external diameter size of valve rod drive structure's one end is greater than the sleeve is kept away from the external diameter size of valve rod drive structure's one end.
4. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 1,
the valve rod driving structure comprises a base, a hydraulic cylinder and a piston, wherein the first end of the piston is connected with the valve rod, the valve rod penetrates through the base in a sealing sliding manner, a first sealing structure is arranged between the valve rod and the base, a second sealing structure is arranged between the valve rod and the piston, and a third sealing structure is arranged between the valve clack guiding structure and the base and between the valve body.
5. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 4,
the first sealing structure comprises a first sealing ring groove arranged on the base, and two first sealing rings are arranged in the first sealing ring groove; the first sealing structure further comprises a first sinking groove arranged on the base, a first plug elastic energy storage sealing ring and a second plug elastic energy storage sealing ring are arranged in the first sinking groove, an opening of the first plug elastic energy storage sealing ring is arranged towards the valve clack direction, and an opening of the second plug elastic energy storage sealing ring is arranged towards the piston direction.
6. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 5,
and a check ring is arranged on one side, close to the piston, of the first sealing ring groove.
7. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 5,
and the end part of the first sinking groove is provided with a base cover to prop against and fix the second pan plug elastic energy storage sealing ring.
8. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 4,
the second sealing structure comprises two second sealing rings arranged between the valve rod and the piston; the second sealing structure further comprises a second sinking groove arranged on the piston, a third floodplug elastic energy storage sealing ring is arranged in the second sinking groove, and an opening of the third floodplug elastic energy storage sealing ring is arranged towards the direction of the valve clack.
9. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 4,
the third sealing structure comprises a first radial sealing O-ring and a first end face sealing O-ring which are arranged between the base and the valve clack guiding structure; the third sealing structure further comprises a second radial sealing O-ring and a second end face sealing O-ring which are arranged between the valve clack guiding structure and the valve body.
10. A bypass needle valve for a pumped-hydro power station globe valve as defined in claim 9,
the valve clack guiding structure is provided with a half dovetail groove, and the first end face sealing O-shaped ring and the second end face sealing O-shaped ring are clamped in the half dovetail groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320903197.4U CN220037472U (en) | 2023-04-20 | 2023-04-20 | Bypass needle valve for spherical valve of pumped storage hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320903197.4U CN220037472U (en) | 2023-04-20 | 2023-04-20 | Bypass needle valve for spherical valve of pumped storage hydropower station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220037472U true CN220037472U (en) | 2023-11-17 |
Family
ID=88744354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320903197.4U Active CN220037472U (en) | 2023-04-20 | 2023-04-20 | Bypass needle valve for spherical valve of pumped storage hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220037472U (en) |
-
2023
- 2023-04-20 CN CN202320903197.4U patent/CN220037472U/en active Active
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