CN216278032U - Quick closing valve for steam turbine - Google Patents
Quick closing valve for steam turbine Download PDFInfo
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- CN216278032U CN216278032U CN202122778078.4U CN202122778078U CN216278032U CN 216278032 U CN216278032 U CN 216278032U CN 202122778078 U CN202122778078 U CN 202122778078U CN 216278032 U CN216278032 U CN 216278032U
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- valve rod
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- rod
- steam turbine
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Abstract
The utility model relates to a quick closing valve for a steam turbine, wherein a valve shell of the quick closing valve is provided with an air inlet and an air outlet, a flange connecting surface is arranged at the end surface of the air outlet, and the quick closing valve is provided with a valve rod I and a valve rod II; one end of the first valve rod is connected with the butterfly valve, the other end of the first valve rod extends into the valve cover and is connected with one end of the second valve rod through the nut assembly, and the other end of the second valve rod extends into the oil cylinder and is connected with the piston assembly; the valve rod design is two, connects through nut assembly between two valve rods, and gapped between the left end face of nut one and the inner chamber terminal surface of extension cover, and when valve rod one received high temperature expansion like this, valve rod one expanded dimension should be in right end nut one, rather than left end and butterfly valve seal side, and sealing performance is better like this.
Description
Technical Field
The utility model relates to the field of valves, in particular to a quick closing valve for a steam turbine.
Background
The quick closing valve is also called a main valve, is a main closing mechanism between a main steam pipeline and a steam turbine, and can immediately cut off steam inlet of the steam turbine in an emergency state to enable a unit to be quickly stopped. The existing quick-closing valve mainly comprises a valve casing, a valve seat, a butterfly valve, a valve cover, an oil cylinder, a piston assembly and a valve rod, wherein the valve casing, the valve cover and the oil cylinder are sequentially connected, the valve seat is installed in the valve casing, the piston assembly is installed in the oil cylinder, the valve rod penetrates through the valve cover, one end of the valve rod is connected with the butterfly valve, the other end of the valve rod is connected with the piston assembly, and the oil cylinder drives the valve rod to move left and right to control opening and closing of the quick-closing valve. The current quick-closing valves have the following disadvantages: (1) the valve casing and the steam turbine body are in a welded structure, so that the defects of inconvenient installation, maintenance and replacement exist; (2) the valve seat is installed in the valve shell through spot welding, so that the defect of inconvenient installation exists; (3) the valve rod is a whole one-section type, and the sealing performance is reduced when the valve rod is expanded under high temperature.
Therefore, there is a need for improvements and optimizations to existing quick-closing valves.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a quick-closing valve with a reasonable structural design.
The technical scheme adopted by the utility model for solving the problems is as follows: the utility model provides a quick-closing valve for steam turbine, includes valve casing, disk seat, butterfly valve, valve gap, hydro-cylinder and piston assembly, valve casing, valve gap and hydro-cylinder connect gradually, the valve casing has air inlet and gas outlet, the disk seat is installed in the valve casing, piston assembly installs its characterized in that in the hydro-cylinder: the quick closing valve also comprises a valve rod I and a valve rod II; one end of the first valve rod is connected with a butterfly valve, the butterfly valve is positioned in the valve shell and matched with the valve seat, the other end of the first valve rod extends into the valve cover and is connected with one end of the second valve rod through a nut component, and the other end of the second valve rod extends into the oil cylinder and is connected with the piston component; a flange connecting surface is arranged at the end surface of the air outlet of the valve shell; the valve seat is mounted in the valve housing by a pin.
Preferably, a plurality of flange connecting holes are uniformly distributed on the flange connecting surface along the circumferential direction.
Preferably, the nut assembly comprises a first nut, a second nut and an extension sleeve, the first nut is installed at the end part of the first valve rod through threaded connection, the second nut is installed at the end part of the second valve rod through threaded connection, the second nut is provided with a circle of external threads, the extension sleeve is sleeved on the first valve rod and is provided with a circle of internal threads, and the second nut and the extension sleeve are connected together through the matching of the internal threads and the external threads; when the right end part of the first valve rod is abutted against the left end part of the second valve rod, a gap is formed between the left end face of the first nut and the end face of the inner cavity of the extension sleeve, and the gap is 6 mm.
Preferably, a spring is mounted at the bottom of the valve housing.
Compared with the prior art, the utility model has the following advantages and effects:
1. the flange connecting surface is arranged at the end face of the air outlet of the valve casing, the connecting mode between the valve casing and the steam turbine body is changed into a flange assembling mode through the flange connecting surface, the installation, the maintenance and the replacement of accessories are convenient, in addition, the spring is arranged at the bottom of the valve casing, and the spring can share the bolt force of the flange connecting surface, so that the machine is more stable in operation;
2. the valve rod design is two, connects through nut assembly between two valve rods, and gapped between the left end face of nut one and the inner chamber terminal surface of extension cover, and when valve rod one received high temperature expansion like this, valve rod one expanded dimension should be in right end nut one, rather than left end and butterfly valve seal side, and sealing performance is better like this.
Drawings
In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic front sectional view of an embodiment of the present invention.
Fig. 2 is a schematic sectional view taken along line a-a in fig. 1.
Fig. 3 is an enlarged view at B in fig. 1.
Description of reference numerals: a valve housing 1; a valve seat 2; a butterfly valve 3; a valve cover 4; an oil cylinder 5; a piston assembly 6; a first valve rod 7; a second valve rod 8; a pin 9; a first nut 10; a second nut 11; an extension sleeve 12; a spring 13; an oil cup 14; an air inlet 100; an air outlet 101; a flange joint face 1010; the flange is connected to the hole 1011.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
See fig. 1-3.
The embodiment discloses a quick closing valve for a steam turbine, which comprises a valve casing 1, a valve seat 2, a butterfly valve 3, a valve cover 4, an oil cylinder 5, a piston assembly 6, a first valve rod 7 and a second valve rod 8. The valve casing 1, the valve cover 4 and the oil cylinder 5 are connected in sequence, and the piston assembly 6 is installed in the oil cylinder 5.
In this embodiment, valve casing 1 has air inlet 100 and gas outlet 101, air inlet 100 is used for being connected with steam conduit, steam gets into from air inlet 100, gas outlet 101 is used for being connected with this body of steam turbine, steam enters into the steam turbine through gas outlet 101, be provided with flange joint face 1010 in this embodiment in gas outlet 101 terminal surface department, and there are twelve flange connecting hole 1011 along the circumference equipartition on flange joint face 1010, just so can conveniently be in the same place valve casing 1 and this body of steam turbine with flange joint's mode, change the connected mode between valve casing 1 and the steam turbine body into flange assembling formula through flange joint face 1010, easy to assemble, overhaul, change the accessory, in addition, spring 13 is installed to the bottom at valve casing 1, flange joint face bolt power can be shared to spring 13, make the machine more steady when the operation.
In this embodiment, beat the blind hole on disk seat 2 to set up the mounting hole on valve casing 1, the event can install disk seat 2 in valve casing 1 through round pin post 9, when needing to be changed or overhaul disk seat 2, pull out round pin post 9 can, labour saving and time saving.
In this embodiment, the one end of valve rod one 7 is connected with butterfly valve 3, butterfly valve 3 be located valve casing 1 and with the cooperation of disk seat 2, the other end of valve rod one 7 stretch into in valve gap 4, and pass through nut component with the one end of valve rod two 8 and be connected, the other end of valve rod two 8 stretch into in the hydro-cylinder 5, and be connected with piston assembly 6.
Specifically, the nut assembly in the embodiment comprises a first nut 10, a second nut 11 and an extension sleeve 12, wherein the first nut 10 is installed at the end part of the first valve rod 7 through threaded connection, the second nut 11 is installed at the end part of the second valve rod 8 through threaded connection, the second nut 11 is provided with a circle of external threads, the extension sleeve 12 is sleeved on the first valve rod 7, the extension sleeve 12 is provided with a circle of internal threads, and the second nut 11 and the extension sleeve 12 are connected together through internal and external threads in a matched mode; when the right end of the first valve rod 7 abuts against the left end of the second valve rod 8, a gap L is formed between the left end face of the first nut 10 and the end face of the inner cavity of the extension sleeve 12, the gap is 6mm, and therefore when the first valve rod 7 expands at high temperature, the expansion size of the first valve rod 7 is on the side of the right end nut 10 instead of the sealing side of the left end and the butterfly valve 3, and sealing performance is better.
In this embodiment, an oil cup 14 is further installed in the valve cover 4, the oil cup 14 is sleeved on the second nut 11, and the two end faces of the oil cup are limited by a gasket and the extension sleeve 12 respectively.
In the embodiment, the working principle of the quick-closing valve is referred to the prior art, and other parts which are not mentioned refer to the prior art, and are not described again.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. All equivalent or simple changes in the structure, characteristics and principles of the utility model are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.
Claims (4)
1. The utility model provides a quick-closing valve for steam turbine, includes valve casing (1), disk seat (2), butterfly valve (3), valve gap (4), hydro-cylinder (5) and piston assembly (6), valve casing (1), valve gap (4) and hydro-cylinder (5) connect gradually, valve casing (1) has air inlet (100) and gas outlet (101), install in valve casing (1) disk seat (2), piston assembly (6) are installed in hydro-cylinder (5), its characterized in that: the quick-closing valve also comprises a valve rod I (7) and a valve rod II (8); one end of the first valve rod (7) is connected with the butterfly valve (3), the butterfly valve (3) is located in the valve casing (1) and matched with the valve seat (2), the other end of the first valve rod (7) extends into the valve cover (4) and is connected with one end of the second valve rod (8) through the nut component, and the other end of the second valve rod (8) extends into the oil cylinder (5) and is connected with the piston component (6); a flange connecting surface (1010) is arranged on the end surface of the air outlet (101) of the valve shell (1); the valve seat (2) is mounted in the valve housing (1) by means of a pin (9).
2. The quick closing valve for a steam turbine according to claim 1, wherein: and a plurality of flange connecting holes (1011) are uniformly distributed on the flange connecting surface (1010) along the circumferential direction.
3. The quick closing valve for a steam turbine according to claim 1, wherein: the nut assembly comprises a first nut (10), a second nut (11) and an extension sleeve (12), the first nut (10) is installed at the end part of the first valve rod (7) through threaded connection, the second nut (11) is installed at the end part of the second valve rod (8) through threaded connection, the second nut (11) is provided with a circle of external threads, the extension sleeve (12) is sleeved on the first valve rod (7), the extension sleeve (12) is provided with a circle of internal threads, and the second nut (11) and the extension sleeve (12) are connected together through the matching of the internal threads and the external threads; when the right end part of the first valve rod (7) is abutted against the left end part of the second valve rod (8), a gap is formed between the left end surface of the first nut (10) and the end surface of the inner cavity of the extension sleeve (12), and the gap is 6 mm.
4. The quick closing valve for a steam turbine according to claim 1, wherein: and a spring (13) is arranged at the bottom of the valve shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122778078.4U CN216278032U (en) | 2021-11-11 | 2021-11-11 | Quick closing valve for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122778078.4U CN216278032U (en) | 2021-11-11 | 2021-11-11 | Quick closing valve for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216278032U true CN216278032U (en) | 2022-04-12 |
Family
ID=81009647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122778078.4U Active CN216278032U (en) | 2021-11-11 | 2021-11-11 | Quick closing valve for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216278032U (en) |
-
2021
- 2021-11-11 CN CN202122778078.4U patent/CN216278032U/en active Active
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