CN217328477U - Labyrinth regulating valve with throttling and pressure reducing orifice plate - Google Patents
Labyrinth regulating valve with throttling and pressure reducing orifice plate Download PDFInfo
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- CN217328477U CN217328477U CN202220243583.0U CN202220243583U CN217328477U CN 217328477 U CN217328477 U CN 217328477U CN 202220243583 U CN202220243583 U CN 202220243583U CN 217328477 U CN217328477 U CN 217328477U
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Abstract
The utility model belongs to the technical field of labyrinth problem governing valve technique and specifically relates to a labyrinth governing valve with throttle pressure reduction orifice plate. The utility model provides a labyrinth governing valve with throttle decompression orifice board, includes valve body, valve gap, the top of valve body is equipped with the valve gap, the top of valve gap is equipped with the valve rod, the middle part of valve body is equipped with the big case, the below of big case is equipped with the disk seat, big case top is equipped with the valve cap, the lower extreme of valve rod runs through the valve cap and is connected with the big case, be equipped with the pressure regulating cavity between valve cap and the big case, be equipped with the throttle pore on the valve cap, the weir formula labyrinth valve cage is established to the outer fringe cover of big case, be equipped with the transition air chamber between weir formula labyrinth valve cage and the valve body. Compared with the prior art, the utility model, the anti cavitation design that has adopted labyrinth valve utilizes the multistage decompression principle of labyrinth valve cage, through the change of forcing the medium to flow through right angle bend or runner volume, makes velocity of flow and pressure get effectual control, reaches the purpose that steps down step by step.
Description
Technical Field
The utility model belongs to the technical field of labyrinth problem governing valve technique and specifically relates to a labyrinth governing valve with throttle pressure reduction orifice plate.
Background
The labyrinth regulating valve can realize cavitation resistance, flash evaporation resistance, low vibration and low noise, because the labyrinth regulating valve effectively controls the generation of high fluid speed and simultaneously meets the aim of final control: it is more efficient to control system pressure and flow throughout the valve stroke. The labyrinth valve can successfully achieve the principle of the purposes compared with other valves, but because the pressure difference between the inlet and the outlet of the valve is very large, the valve is easy to generate phenomena of squeaking, cavitation, flash evaporation and the like in the operation process, and a valve core and a valve seat of the valve are easy to blow and damage.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the utility model provides a labyrinth adjusting valve with throttle pressure reduction orifice plate, including valve body, valve gap, the top of valve body is equipped with the valve gap, the top of valve gap is equipped with the valve rod, the middle part of valve body is equipped with the big case, the below of big case is equipped with the disk seat, big case top is equipped with the valve cap, the lower extreme of valve rod runs through the valve cap and is connected with the big case, be equipped with the pressure regulating cavity between valve cap and the big case, be equipped with the throttle pore on the valve cap, the outer fringe cover of big case is established and is enclosed weir formula labyrinth valve cage, be equipped with the transition air chamber between enclosed weir formula labyrinth valve cage and the valve body, be connected through the throttle pore between pressure regulating cavity and the transition air chamber, be equipped with multistage pressure reduction orifice plate on the throttle pore.
Further, the lower end of the big valve core is provided with a protective sleeve.
Furthermore, an air inlet channel is arranged below the valve seat, an air outlet channel is arranged on one side of the big valve core, and the air outlet channel is communicated with the transition air chamber.
Further, a sealing ring is arranged between the valve cover and the valve cap.
Compared with the prior art, the utility model, the anti cavitation design that has adopted labyrinth valve utilizes the multistage principle that steps down of labyrinth valve cage, through the change of forcing the medium to flow through a series of right angle bends or runner volume, makes velocity of flow and pressure get effectual control, reaches the purpose that steps down step by step. On the basis, a multi-stage pressure reduction orifice plate is added to protect the valve rod from being eroded when the valve rod is opened. In order to prevent the high-pressure differential valve from working for a long time with small opening degree when a unit runs at low load, a medium erosion protective sleeve is added on the outer side of the sealing surface of the valve core by using special alloy, and a labyrinth flow channel is designed on the valve core protective sleeve, so that the damage of high pressure and high flow speed to the sealing surface is greatly reduced, and the service life of the valve is prolonged.
Drawings
Fig. 1 is a schematic structural view of the labyrinth regulating valve with the throttling and pressure reducing orifice plate of the present invention.
Fig. 2 is a partial enlarged view of the labyrinth regulating valve with the throttling and depressurizing orifice plate of the present invention.
Fig. 3 is a second enlarged view of the labyrinth adjusting valve with the throttling and pressure reducing orifice plate of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, the utility model relates to a labyrinth regulating valve with a throttling and pressure reducing orifice plate, which comprises a valve body 1 and a valve cover 2, a valve cover 2 is arranged above the valve body 1, a valve rod 3 is arranged above the valve cover 2, a big valve core 4 is arranged in the middle of the valve body 1, a valve seat 5 is arranged below the big valve core 4, a valve cap 6 is arranged above the big valve core 4, the lower end of the valve rod 3 penetrates through the valve cap 6 to be connected with the big valve core 4, a pressure regulating cavity 7 is arranged between the valve cap 6 and the big valve core 4, a throttling hole 8 is arranged on the valve cap 6, a cofferdam type labyrinth valve cage 9 is sleeved on the outer edge of the big valve core 4, a transition air chamber 10 is arranged between the cofferdam type labyrinth valve cage 9 and the valve body 1, the pressure regulating cavity 7 is connected with the transition air chamber 10 through a throttling hole 8, and a multi-stage pressure reducing throttling orifice plate 11 is arranged on the throttling hole 8.
Wherein, the lower end of the big valve core 4 is provided with a protective sleeve 12. An air inlet channel 13 is arranged below the valve seat 5, an air outlet channel 14 is arranged on one side of the big valve core 4, and the air outlet channel 14 is communicated with the transition air chamber 10. And a sealing ring 15 is arranged between the valve cover 2 and the valve cap 6.
Example (b): as shown in fig. 1, 2 and 3, the structure of the present invention is schematically illustrated.
The utility model discloses a valve body 1, valve gap 2, the top of valve body 1 is equipped with valve gap 2, the top of valve gap 2 is equipped with valve rod 3, the middle part of valve body 1 is equipped with big case 4, the below of big case 4 is equipped with disk seat 5, big case 4 top is equipped with valve cap 6, the lower extreme of valve rod 3 runs through valve cap 6 and is connected with big case 4, be equipped with pressure regulating cavity 7 between valve cap 6 and the big case 4, be equipped with throttle pore 8 on the valve cap 6, cofferdam formula labyrinth valve cage 9 is established to the outer fringe cover of big case 4, be equipped with transition air chamber 10 between cofferdam formula labyrinth valve cage 9 and the valve body 1, be connected through throttle pore 8 between pressure regulating cavity 7 and the transition air chamber 10, be equipped with multistage decompression throttle orifice plate 11 on the throttle pore plate 8, multistage decompression throttle orifice plate 11 can protect valve rod 3 can not erodeed when opening.
The lower end of the big valve core 4 is provided with a protective sleeve 12. The protective sleeve 12 prevents the medium from directly eroding the sealing surface at the lower end of the big valve core 4, and the grooves at the positions of the cofferdam type labyrinth valve cage 9 and the valve seat 5 play a role in reducing pressure and speed, thereby effectively protecting the cavitation erosion of the sealing surface at the lower end of the big valve core 4.
An air inlet channel 13 is arranged below the valve seat 5, an air outlet channel 14 is arranged on one side of the big valve core 4, and the air outlet channel 14 is communicated with the transition air chamber 10. A sealing ring 15 is arranged between the valve cover 2 and the valve cap 6.
In normal work, when the valve is closed, gas is in the air inlet channel 13 under the sealing effect of the big valve core 4 and the valve seat 5, the big valve core 4 and the valve seat 5 adopt different sealing angles, so that the sealing condition is linear contact sealing, and under the condition of the same sealing force, the linear contact sealing generates larger sealing specific pressure than surface contact sealing, so that the sealing is more reliable.
When the valve needs to be opened, the valve rod 3 rises to drive the large valve core 4 to rise, gas in the gas inlet channel 13 enters the cofferdam type labyrinth valve cage 9 through a gap between the large valve core 4 and the valve seat 5, and the flow velocity and the pressure are effectively controlled by forcing a medium to flow through a series of right-angle bends or the change of the volume of a flow channel by utilizing the multi-stage pressure reduction principle of the cofferdam type labyrinth valve cage 9, so that the purpose of reducing the pressure step by step is achieved;
the gas enters the transition air chamber 10 through the cofferdam type labyrinth valve cage 9, the air pressure in the transition air chamber 10 is relatively large due to the fact that the pressure difference of the inlet and the outlet of the valve is large, the pressure regulating cavity 7 is connected with the transition air chamber 10 through the throttling hole channel 8, the gas easily erodes the valve rod 3 in the pressure regulating cavity 7 through the throttling hole channel 8, and the multi-stage depressurization throttling hole plate 11 is additionally arranged on the throttling hole channel 8 and can protect the valve rod 3 from being eroded when being opened.
When the unit runs at low load, the high pressure difference valve works at small opening for a long time, the medium erosion protective sleeve 12 is added on the outer side of the sealing surface of the large valve core 4 by using special alloy, and a labyrinth flow channel is designed on the protective sleeve 12, so that the damage of high pressure and high flow speed to the sealing surface is greatly reduced, and the service life of the valve is prolonged.
Claims (4)
1. The utility model provides a labyrinth governing valve with throttle decompression orifice plate, includes valve body (1), valve gap (2), its characterized in that: a valve cover (2) is arranged above the valve body (1), a valve rod (3) is arranged above the valve cover (2), a big valve core (4) is arranged in the middle of the valve body (1), a valve seat (5) is arranged below the big valve core (4), a valve cap (6) is arranged above the big valve core (4), the lower end of the valve rod (3) penetrates through the valve cap (6) to be connected with the big valve core (4), a pressure regulating cavity (7) is arranged between the valve cap (6) and the big valve core (4), a throttling hole channel (8) is arranged on the valve cap (6), a cofferdam type labyrinth valve cage (9) is sleeved on the outer edge of the big valve core (4), a transition air chamber (10) is arranged between the cofferdam type labyrinth valve cage (9) and the valve body (1), the pressure regulating cavity (7) is connected with the transition air chamber (10) through a throttling pore passage (8), and a multi-stage pressure reduction orifice plate (11) is arranged on the throttling pore passage (8).
2. The labyrinth-type regulating valve with the throttling and depressurizing orifice plate as claimed in claim 1, wherein: the lower end of the big valve core (4) is provided with a protective sleeve (12).
3. The labyrinth-type regulating valve with the throttling and depressurizing orifice plate as claimed in claim 1, wherein: the lower part of the valve seat (5) is provided with an air inlet channel (13), one side of the big valve core (4) is provided with an air outlet channel (14), and the air outlet channel (14) is communicated with the transition air chamber (10).
4. The labyrinth-type regulating valve with the throttling and depressurizing orifice plate as claimed in claim 1, wherein: and a sealing ring (15) is arranged between the valve cover (2) and the valve cap (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220243583.0U CN217328477U (en) | 2022-01-26 | 2022-01-26 | Labyrinth regulating valve with throttling and pressure reducing orifice plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220243583.0U CN217328477U (en) | 2022-01-26 | 2022-01-26 | Labyrinth regulating valve with throttling and pressure reducing orifice plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217328477U true CN217328477U (en) | 2022-08-30 |
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ID=82996266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220243583.0U Active CN217328477U (en) | 2022-01-26 | 2022-01-26 | Labyrinth regulating valve with throttling and pressure reducing orifice plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217328477U (en) |
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2022
- 2022-01-26 CN CN202220243583.0U patent/CN217328477U/en active Active
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