CN213574255U - Built-in plate type regulating valve for regulating steam extraction pressure of steam turbine - Google Patents
Built-in plate type regulating valve for regulating steam extraction pressure of steam turbine Download PDFInfo
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- CN213574255U CN213574255U CN202022941240.5U CN202022941240U CN213574255U CN 213574255 U CN213574255 U CN 213574255U CN 202022941240 U CN202022941240 U CN 202022941240U CN 213574255 U CN213574255 U CN 213574255U
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Abstract
A built-in plate type regulating valve for regulating extraction pressure of a steam turbine relates to a built-in plate type regulating valve. The utility model discloses a solve the adjustment of the steam turbine extraction pressure of current high parameter and have that cylinder inner structure is complicated, the poor problem of operational reliability. The utility model discloses a valve body (4) suit is on steam turbine rotor (7), and installs sealing device (6) between valve body (4) and steam turbine rotor (7), and cylinder (2) suit is on valve body (4), and rectangle channel (8) are seted up to window department that steam flowed through on valve body (4), be equipped with one inclined plane (9) on the terminal surface about the play steam side of rectangle channel (8) respectively, valve plate (5) cartridge is in rectangle channel (8), the lower extreme and valve plate (5) fixed connection of valve rod (3), and the upper end of valve rod (3) is passed and is installed on cylinder (2) through valve gap (1) after valve body (4) and cylinder (2). The utility model is used for the extraction pressure is adjusted to the steam turbine.
Description
Technical Field
The utility model relates to a built-in board type adjusting valve, concretely relates to built-in board type adjusting valve who is used for steam turbine to adjust extraction pressure.
Background
In order to accurately adjust the extraction pressure, the extraction steam turbine can be adjusted in two ways. One is that the steam in the cylinder is led out of the cylinder through a pipeline, then is subjected to pressure adjustment through an adjusting valve, and then the residual steam is led back into the cylinder again, but the mode causes the structure of the cylinder to be complex, the axial size to be increased more, even the cylinder needs to be designed separately, and the pipeline and the adjusting equipment for steam extraction are more, and the occupied space is large; the other is that a rotary clapboard is adopted in the cylinder, but the regulation is only limited to the low-parameter steam extraction pressure regulation, otherwise the problems of deformation, jamming and the like of the rotary clapboard can be caused, and the rotary clapboard is complex in design and manufacture and low in reliability.
In conclusion, the problems of complex internal structure and poor operation reliability of the cylinder exist in the adjustment of the extraction pressure of the existing high-parameter steam turbine.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the adjustment of the steam extraction pressure of the steam turbine with high parameters has a complicated internal structure and poor operational reliability. Further provides a built-in plate type regulating valve for regulating the extraction pressure of the steam turbine.
The technical scheme of the utility model is that: a built-in plate type regulating valve for regulating extraction pressure of a steam turbine comprises a cylinder, a valve cover, a valve rod, a valve body, a valve plate, a sealing device and a steam turbine rotor, wherein the valve body is formed by buckling an upper half part and a lower half part which are horizontally split, the valve body is sleeved on the steam turbine rotor, the sealing device is arranged between the valve body and the steam turbine rotor, the cylinder is sleeved on the valve body, a rectangular channel is formed in a window through which steam flows on the valve body, an inclined plane is respectively arranged on the left end surface and the right end surface of the steam outlet side of the rectangular channel, the valve plate is inserted in the rectangular channel, the lower end of the valve rod is fixedly connected with the valve plate, and the upper end of.
Further, the cylinder is connected with the valve body through a shoulder.
Further, the outer dimension of the valve plate is smaller than the inner dimension of the rectangular channel.
Further, the valve plate is in inclined surface contact with the rectangular channel, and a gap is reserved between the other side end surface of the valve plate and the rectangular channel.
Further, the valve rod and the valve plate are in clearance fit with the valve body and the cylinder.
Compared with the prior art, the utility model has the following effect:
the utility model discloses a just can the accurate built-in board type adjusting valve who adjusts extraction pressure at cylinder external operation, the service condition of this valve does not receive the steam parameter restriction. Just the utility model discloses a built-in board type adjusting valve axial dimension is little, simple structure, reliability are high, the installation and maintenance is convenient, easily control the operation, have accurate extraction pressure regulatory function, and service condition does not receive the steam parameter restriction, neither influences the security of steam turbine nor influences the through-flow efficiency of steam turbine.
Drawings
Fig. 1 is a schematic axial sectional view of the structure of the present invention installed between through-flow in the cylinder.
Fig. 2 is a transverse sectional view of the built-in plate type regulator valve.
FIG. 3 is a schematic view of the structural fit and the guiding and positioning between the valve plate and the valve body.
Detailed Description
The first embodiment is as follows: the embodiment is described by combining fig. 1 to fig. 3, and the built-in plate type regulating valve for regulating extraction pressure of a steam turbine of the embodiment comprises a cylinder 2, a valve cover 1, a valve rod 3, a valve body 4, a valve plate 5, a sealing device 6 and a steam turbine rotor 7, wherein the valve body 4 is formed by buckling an upper half part and a lower half part which are divided horizontally, the valve body 4 is sleeved on the steam turbine rotor 7, the sealing device 6 is arranged between the valve body 4 and the steam turbine rotor 7, the cylinder 2 is sleeved on the valve body 4, a rectangular channel 8 is arranged at a window through which steam flows on the valve body 4, the left end surface and the right end surface of the steam outlet side of the rectangular channel 8 are respectively provided with an inclined surface 9, the valve plate 5 is inserted in the rectangular channel 8, the lower end of the valve rod 3 is fixedly connected with the valve plate 5, and the upper end of.
The built-in plate type regulating valve of the embodiment does not need to complicate the internal structure of the steam turbine, and only needs to be provided with the channel and the rectangular groove of the valve rod and the valve plate. The steam extraction pressure adjusting device effectively solves the problem that the steam extraction pressure can be adjusted by high-parameter steam under the conditions that the cylinder structure of the steam turbine is not complicated and the axial size of the cylinder is not lengthened.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 1 to 2, and the cylinder 2 and the valve body 4 of the present embodiment are connected by a shoulder. By the arrangement, the cylinder 2 and the valve body 4 can be better positioned and supported. Other components and connections are the same as in the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 1 to 2, and the outer dimension of the valve plate 5 of the present embodiment is smaller than the inner dimension of the rectangular channel 8. So set up, make valve plate 5 can freely open and close along the axis direction of valve rod 3 in the channel, can restrict the lateral shifting distance of valve plate 5 again. Other components and connection relationships are the same as those in the second embodiment.
The fourth concrete implementation mode: in the present embodiment, the inclined surface 9 between the valve plate 5 and the rectangular groove 8 of the present embodiment is in contact with each other, and a gap is left between the other end surface of the valve plate 5 and the rectangular groove 8, as described with reference to fig. 1 to 2. So set up, inclined plane 9 not only can play the effect of direction and location to the valve plate, can also play sealed effect simultaneously. Other compositions and connection relations are the same as those of the third embodiment.
The fifth concrete implementation mode: the present embodiment will be described with reference to fig. 1 to 2, and the valve rod 3 and the valve plate 5 of the present embodiment are clearance-fitted to the valve body 4 and the cylinder 2. So set up, be convenient for quick, nimble upper and lower pull of realization valve rod and valve plate. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.
The present embodiment will be described with reference to fig. 1 and 2, and the built-in plate type regulator valve of the present embodiment includes main components such as a valve body assembly 4, a valve rod 3, a valve plate 5, a valve cover and a seal connecting member 1 thereof, which are assembled in a cylinder 2. The valve body component 4 of the built-in plate type adjusting valve is positioned and supported with the cylinder 2 through a convex shoulder, the valve body component 4 is composed of an upper half part and a lower half part which are divided horizontally, and the assembled valve body forms a circular whole through a connecting piece. The valve body is provided with windows through which steam flows, each window corresponds to a set of valve components, and the number and the size of the windows are determined by calculation. A rectangular channel suitable for inserting the valve plate 5 is formed in the valve body parallel to the end face of the valve body 4, and the size of the channel is slightly larger than that of the valve plate 5, so that the valve plate 5 can be freely opened and closed in the channel along the axis direction of the valve rod 3, and the transverse moving distance of the valve plate 5 can be limited. A steam sealing device 6 is arranged between the valve body 4 and the turbine rotor 7, so that excessive leakage of steam between the two parts can be avoided. The built-in plate type regulating valve is arranged on the stage of the through flow 8 which needs steam extraction. The valve rod 3 connected with the valve plate 5 extends out of the cylinder through a channel on the cylinder, passes through a sealing piece on the valve cover 1 and then is connected with an actuating mechanism.
Referring to fig. 2 and 3, the present embodiment is described, and the left and right end faces of the rectangular channel on the steam outlet side of the valve body 4 are provided with inclined planes for guiding and positioning the valve plate 5 during opening and closing, and the inclined planes simultaneously play a role of sealing. Since the valve body 4 and the valve plate 5 are in contact only through the inclined surface, the friction force between the two is reduced. The fit clearance between the valve body 4 and the valve plate 5 allows some steam leakage, which can reduce the opening force of the valve plate 5.
The utility model discloses a theory of operation:
when the built-in plate type regulating valve is used, if the steam extraction pressure on the steam inlet side of the valve needs to be improved, only the valve plate 5 needs to be moved axially, and the steam flowing window on the valve body 4 needs to be closed; if the extraction pressure on the steam inlet side of the valve needs to be reduced, the valve plate 5 needs to be axially moved in the opposite direction, and a steam flow window on the valve body 4 needs to be opened.
Claims (5)
1. A built-in plate type regulating valve for regulating extraction pressure of a steam turbine comprises a cylinder (2), and is characterized in that: it also comprises a valve cover (1), a valve rod (3), a valve body (4), a valve plate (5), a sealing device (6) and a turbine rotor (7),
the valve body (4) comprises the upper half part and the lower half part which are horizontally split, the valve body (4) is sleeved on a steam turbine rotor (7), a sealing device (6) is installed between the valve body (4) and the steam turbine rotor (7), the cylinder (2) is sleeved on the valve body (4), a rectangular channel (8) is formed in a window where steam flows on the valve body (4), an inclined plane (9) is arranged on the left end face and the right end face of the steam outlet side of the rectangular channel (8), the valve plate (5) is inserted in the rectangular channel (8), the lower end of the valve rod (3) is fixedly connected with the valve plate (5), and the upper end of the valve rod (3) is installed on the cylinder (2) through the valve cover (1) after penetrating through the valve body (4) and the cylinder (.
2. The built-in plate type regulating valve for regulating extraction pressure of a steam turbine according to claim 1, wherein: the cylinder (2) is connected with the valve body (4) through a convex shoulder.
3. The built-in plate type regulating valve for regulating extraction pressure of a steam turbine according to claim 2, wherein: the outer dimensions of the valve plate (5) are smaller than the inner dimensions of the rectangular channel (8).
4. A built-in plate type regulator valve for regulating extraction pressure of a steam turbine according to claim 3, wherein: the valve plate (5) is contacted with the inclined plane (9) between the rectangular channels (8), and gaps are reserved between the other side end surfaces of the valve plate (5) and the rectangular channels (8).
5. The built-in plate type regulating valve for regulating extraction pressure of a steam turbine according to claim 4, wherein: the valve rod (3) and the valve plate (5) are in clearance fit with the valve body (4) and the cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022941240.5U CN213574255U (en) | 2020-12-10 | 2020-12-10 | Built-in plate type regulating valve for regulating steam extraction pressure of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022941240.5U CN213574255U (en) | 2020-12-10 | 2020-12-10 | Built-in plate type regulating valve for regulating steam extraction pressure of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213574255U true CN213574255U (en) | 2021-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022941240.5U Active CN213574255U (en) | 2020-12-10 | 2020-12-10 | Built-in plate type regulating valve for regulating steam extraction pressure of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213574255U (en) |
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2020
- 2020-12-10 CN CN202022941240.5U patent/CN213574255U/en active Active
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