CN210510388U - High-temperature high-pressure main steam valve - Google Patents
High-temperature high-pressure main steam valve Download PDFInfo
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- CN210510388U CN210510388U CN201921446661.1U CN201921446661U CN210510388U CN 210510388 U CN210510388 U CN 210510388U CN 201921446661 U CN201921446661 U CN 201921446661U CN 210510388 U CN210510388 U CN 210510388U
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Abstract
The utility model discloses a high-temperature high-pressure main steam valve, which comprises a main valve body, wherein the main valve body is provided with a first valve cavity, a second valve cavity and a third valve cavity from left to right in sequence, the main valve body is provided with a first valve rod mounting hole, and a steam inlet hole is arranged at the lower end of the first valve cavity; a first fluid passage is arranged between the first valve cavity and the second valve cavity; a second valve rod mounting hole is formed in the upper end position of the second valve cavity, and a first steam outlet hole is formed in the lower end position of the second valve cavity; a second fluid passage is arranged between the second valve cavity and the third valve cavity; a third valve rod mounting hole is formed in the upper end position of the third valve cavity, and a second steam outlet hole is formed in the lower end position of the third valve cavity; and a nickel-based alloy material layer is welded on the outer surface of the main valve body in a surfacing mode. Above-mentioned technical scheme, structural design is reasonable, simple structure, steam cut off reliable, difficult leakage, surface oxidation resistance is good, surface corrosion resistance is good, convenient to use and practicality are good.
Description
Technical Field
The utility model relates to the technical field of valves, concretely relates to high temperature high pressure main steam valve.
Background
Conventional steam turbines have two types of steam valves, one being a main steam valve (also referred to as a "main stop valve") and the other being a regulating valve. Both valves are provided on the upstream side of the steam turbine. The main steam valve functions to shut off steam flow to the turbine. The regulating valve is disposed on the downstream side of the main steam valve and controls the flow rate of steam flowing into the steam turbine during operation.
However, the existing main steam valve is unreasonable in structural arrangement, unreliable in steam cutoff and easy to leak; and the outer surface of the existing main steam valve is easy to oxidize and corrode, the maintenance and operation are troublesome, and the practicability is poor.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a high temperature high pressure main steam valve that structural design is reasonable, simple structure, steam cut off reliably, be difficult for leaking, surface oxidation resistance can be good, surface corrosion resistance can be good, convenient to use and practicality are good.
In order to achieve the above purpose, the utility model provides a following technical scheme: a high-temperature and high-pressure main steam valve comprises a main valve body, wherein the main valve body is sequentially provided with a first valve cavity, a second valve cavity and a third valve cavity from left to right, a first valve rod mounting hole is formed in the left end position, located in the first valve cavity, of the main valve body, and a steam inlet hole is formed in the lower end position, located in the first valve cavity, of the main valve body; the main valve body is provided with a first fluid passage between the first valve cavity and the second valve cavity; a second valve rod mounting hole is formed in the position, located at the upper end of the second valve cavity, of the main valve body, and a first steam outlet hole is formed in the position, located at the lower end of the second valve cavity, of the main valve body; a second fluid passage is arranged between the second valve cavity and the third valve cavity of the main valve body; a third valve rod mounting hole is formed in the position, located at the upper end of the third valve cavity, of the main valve body, and a second steam outlet hole is formed in the position, located at the lower end of the third valve cavity, of the main valve body; a nickel-based alloy material layer is welded on the outer surface of the main valve body in a surfacing mode.
By adopting the technical scheme, three valve cavities are designed in the main valve body, and the existing valve core assembly can be installed in each valve cavity, so that the steam is cut off reliably and is not easy to leak; the nickel-based alloy material layer is welded on the outer surface of the main valve body in a surfacing mode, and the nickel-based alloy material layer is good in oxidation resistance and corrosion resistance, can prolong the service life of the main valve body, reduces maintenance times and is convenient to use; the whole high-temperature high-pressure main steam valve is reasonable in structural design, simple in structure, reliable in steam cutoff, not prone to leakage, good in oxidation resistance of the outer surface, good in corrosion resistance of the outer surface, convenient to use and good in practicability.
The utility model discloses further set up to: the thickness of the nickel-based alloy material layer is 1-5 mm.
The utility model discloses still further set up to: at least one first sealing ring positioning groove is formed in the inner wall surface of the first valve rod mounting hole.
The utility model discloses still further set up to: and at least one second sealing ring positioning groove is formed in the inner wall surface of the second valve rod mounting hole.
The utility model discloses still further set up to: and at least one third sealing ring positioning groove is formed in the inner wall surface of the third valve rod mounting hole.
The utility model discloses still further set up to: the first steam outlet hole and the second steam outlet hole are both stepped holes.
The utility model has the advantages that: compared with the prior art, the utility model has more reasonable structure, three valve cavities are designed in the main valve body, the existing valve core component can be installed in each valve cavity, and the steam is cut off reliably and is not easy to leak; the nickel-based alloy material layer is welded on the outer surface of the main valve body in a surfacing mode, and the nickel-based alloy material layer is good in oxidation resistance and corrosion resistance, can prolong the service life of the main valve body, reduces maintenance times and is convenient to use; the whole high-temperature high-pressure main steam valve is reasonable in structural design, simple in structure, reliable in steam cutoff, not prone to leakage, good in oxidation resistance of the outer surface, good in corrosion resistance of the outer surface, convenient to use and good in practicability.
The invention is further described with reference to the drawings and the specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
In the description of the present embodiment, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, the utility model discloses a high-temperature high-pressure main steam valve, which comprises a main valve body 1, wherein the main valve body 1 is provided with a first valve cavity 11, a second valve cavity 12 and a third valve cavity 13 from left to right in sequence, a first valve rod mounting hole 14 is arranged at the left end of the first valve cavity of the main valve body 1, and a steam inlet hole 15 is arranged at the lower end of the first valve cavity of the main valve body 1; a first fluid passage 16 is arranged between the first valve cavity 11 and the second valve cavity 12 of the main valve body 1; a second valve rod mounting hole 17 is formed in the position, located at the upper end of the second valve cavity 12, of the main valve body 1, and a first steam outlet hole 18 is formed in the position, located at the lower end of the second valve cavity, of the main valve body 1; a second fluid passage 19 is arranged between the second valve cavity and the third valve cavity of the main valve body 1; a third valve rod mounting hole 110 is formed in the position, located at the upper end of the third valve cavity, of the main valve body 1, and a second steam outlet hole 111 is formed in the position, located at the lower end of the third valve cavity, of the main valve body 1; a nickel-based alloy material layer 2 is welded on the outer surface of the main valve body 1 in a surfacing mode.
Preferably, the thickness of the nickel-based alloy material layer 2 is 1-5 mm.
For making the utility model discloses the structure sets up more rationally, as preferred, this embodiment be provided with a first sealing washer positioning groove 141 on the internal face of first valve rod mounting hole 14 at least.
At least one second seal ring positioning groove 171 is formed in the inner wall surface of the second stem mounting hole 17.
At least one third seal ring positioning groove 1101 is formed on the inner wall surface of the third valve rod mounting hole 110.
The first and second steam outlet apertures 18 and 111 are both stepped apertures. Preferably, the inner ports of the first steam outlet hole 18 and the second steam outlet hole 111 are larger than the outer ports, so that steam can be discharged conveniently and smoothly.
In practical application, three valve cavities are designed in the main valve body, and the existing valve core assembly can be installed in each valve cavity, so that steam is cut off reliably and is not easy to leak; the nickel-based alloy material layer is welded on the outer surface of the main valve body in a surfacing mode, and the nickel-based alloy material layer is good in oxidation resistance and corrosion resistance, can prolong the service life of the main valve body, reduces maintenance times and is convenient to use; the whole high-temperature high-pressure main steam valve is reasonable in structural design, simple in structure, reliable in steam cutoff, not prone to leakage, good in oxidation resistance of the outer surface, good in corrosion resistance of the outer surface, convenient to use and good in practicability.
The above embodiments are only used for further explanation of the present invention, and it is not understood that the present invention is limited by the protection scope of the present invention, and the technical engineers in the field are right according to the above contents of the present invention.
Claims (6)
1. A high temperature high pressure main steam valve, includes main valve body (1), its characterized in that: the main valve body (1) is sequentially provided with a first valve cavity (11), a second valve cavity (12) and a third valve cavity (13) from left to right, a first valve rod mounting hole (14) is formed in the left end position of the first valve cavity of the main valve body (1), and a steam inlet hole (15) is formed in the lower end position of the first valve cavity of the main valve body (1); a first fluid passage (16) is arranged between the first valve cavity (11) and the second valve cavity (12) of the main valve body (1); a second valve rod mounting hole (17) is formed in the position, located at the upper end of the second valve cavity (12), of the main valve body (1), and a first steam outlet hole (18) is formed in the position, located at the lower end of the second valve cavity, of the main valve body (1); a second fluid passage (19) is arranged between the second valve cavity and the third valve cavity of the main valve body (1); a third valve rod mounting hole (110) is formed in the position, located at the upper end of the third valve cavity, of the main valve body (1), and a second steam outlet hole (111) is formed in the position, located at the lower end of the third valve cavity, of the main valve body (1); a nickel-based alloy material layer (2) is welded on the outer surface of the main valve body (1) in a surfacing mode.
2. A high temperature and high pressure main steam valve according to claim 1, wherein: the thickness of the nickel-based alloy material layer (2) is 1-5 mm.
3. A high temperature and high pressure main steam valve according to claim 2, wherein: at least one first sealing ring positioning groove (141) is formed in the inner wall surface of the first valve rod mounting hole (14).
4. A high temperature and high pressure main steam valve according to claim 3, wherein: at least one second sealing ring positioning groove (171) is formed in the inner wall surface of the second valve rod mounting hole (17).
5. A high temperature and high pressure main steam valve according to claim 4, wherein: at least one third sealing ring positioning groove (1101) is formed in the inner wall surface of the third valve rod mounting hole (110).
6. A high temperature and high pressure main steam valve according to claim 5, wherein: the first steam outlet hole (18) and the second steam outlet hole (111) are both stepped holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921446661.1U CN210510388U (en) | 2019-09-02 | 2019-09-02 | High-temperature high-pressure main steam valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921446661.1U CN210510388U (en) | 2019-09-02 | 2019-09-02 | High-temperature high-pressure main steam valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210510388U true CN210510388U (en) | 2020-05-12 |
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ID=70544547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921446661.1U Active CN210510388U (en) | 2019-09-02 | 2019-09-02 | High-temperature high-pressure main steam valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210510388U (en) |
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2019
- 2019-09-02 CN CN201921446661.1U patent/CN210510388U/en active Active
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