CN116412262A - Three-stage She Shan series connection cyclone sleeve multistage flow-regulating cavitation-preventing valve - Google Patents
Three-stage She Shan series connection cyclone sleeve multistage flow-regulating cavitation-preventing valve Download PDFInfo
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- CN116412262A CN116412262A CN202310353069.1A CN202310353069A CN116412262A CN 116412262 A CN116412262 A CN 116412262A CN 202310353069 A CN202310353069 A CN 202310353069A CN 116412262 A CN116412262 A CN 116412262A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000012530 fluid Substances 0.000 abstract description 24
- 239000002184 metal Substances 0.000 description 7
- 230000002265 prevention Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/34—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/262—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member with a transverse bore in the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Sliding Valves (AREA)
Abstract
A three-stage She Shan series-connection rotational flow sleeve multistage flow-regulating cavitation-preventing valve comprises a valve body and a flow-guiding inner cylinder in the valve body, wherein a circular seam flow channel is arranged between the valve body and the flow-guiding inner cylinder, a sleeve is arranged in the flow-guiding inner cylinder, a sealing surface is arranged on the sleeve, and the sealing surface is matched and sealed with a sealing ring arranged on the inner wall of the valve body; the wall of the outlet end of the sleeve is sequentially provided with a plurality of strip-shaped flow passages with different inclinations, namely a first She Shan flow passage, a second She Shan flow passage and a third flow passage; the valve rod of the flow guiding inner cylinder is connected with the inner wall of the sleeve through a crank connecting rod mechanism so as to drive the sleeve to do horizontal reciprocating linear motion. The invention forms the multi-stage fluid flow regulating characteristic due to different flow areas formed by the inclination angle change of the three-stage inlet She Shan, thereby improving the regulating characteristic and prolonging the service life.
Description
Technical Field
The invention relates to the field of valve structural design and adjustment, in particular to a three-stage She Shan series swirl sleeve multi-stage flow-adjusting cavitation-preventing valve.
Background
The sleeve type flow regulating valve is used for high water head and high flow rate, is an important device for regulating the flow rate of large reservoir and dam bottom of hydropower station and preventing river bed from being flushed by high-speed fluid, and is mainly used for regulating the flow rate in the requirements of downstream safety and downstream water consumption in the large reservoir, hydropower station in the dead water period and in the storm flood peak. Because the water flow drop of the large reservoir and the hydropower station is large, the water flow can generate high water head (pressure) loss through the throttling element of the sleeve type flow regulating valve, cavitation and flash evaporation are very easy to occur at the sleeve part sleeved with the sleeve type flow regulating valve under the working condition of the high water head (pressure), cavitation phenomenon occurs on the metal wall surface part of the flow passing part, and simultaneously, large noise and vibration can be generated, so that the valve is in sealing failure or the regulating function is distorted, finally, the sleeve type flow regulating valve is in fatigue failure, and the service life of the sleeve type flow regulating valve is reduced. The sleeve flow passage of the traditional sleeve type flow regulating valve is rectangular long, so that the single-stage fluid characteristic regulation can be realized only, and the multistage fluid characteristic regulation can not be realized.
Disclosure of Invention
The invention provides a three-stage She Shan series-connection rotational flow sleeve multi-stage flow regulating and cavitation preventing valve, which is a sleeve type flow regulating valve with multistage flow regulation, cavitation preventing and long service life and suitable for high water head and large flow.
The technical scheme adopted by the invention is as follows:
a three-stage She Shan series-connection rotational flow sleeve multistage flow-regulating cavitation-preventing valve comprises a valve body and a flow-guiding inner cylinder in the valve body, wherein a circular seam flow channel is arranged between the valve body and the flow-guiding inner cylinder, a sleeve is arranged in the flow-guiding inner cylinder, a sealing surface is arranged on the sleeve, and the sealing surface is matched and sealed with a sealing ring arranged on the inner wall of the valve body; the wall of the outlet end of the sleeve is sequentially provided with a plurality of strip-shaped flow passages with different inclinations, namely a first She Shan flow passage, a second She Shan flow passage and a third flow passage; the valve rod of the flow guiding inner cylinder is connected with the inner wall of the sleeve through a crank connecting rod mechanism so as to drive the sleeve to do horizontal reciprocating linear motion.
The inclination angles of the first She Shan, the second She Shan and the third grid in the length direction of the sleeve are sequentially increased.
The inclination angles of the first She Shan, the second She Shan and the third grid are 15 degrees, 30 degrees and 45 degrees in sequence.
The crank connecting rod mechanism comprises a crank, the crank is connected with a connecting rod, the connecting rod is connected with a sliding block through a pin, and the sliding block is arranged on the inner wall of the sleeve; the other end of the crank is connected to the small end of the valve stem, which is driven in rotation by an external drive mechanism.
The beneficial effects of the invention are as follows: the inclination angle of the sleeve three-stage inlet She Shan is changed, so that different fluid flow areas are formed, and the multistage fluid flow regulating characteristic is formed; the fluid rotary-cut enters the sleeve flow channel, a conical spiral high-speed fluid is formed in the center of the sleeve flow channel, the flow channel center speed is low, the flow channel metal wall surface speed is low, the pressure is high, and the cavitation prevention effect of the flow channel metal wall surface is realized. The adjusting characteristic is improved, and the service life is prolonged.
Description of the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a block diagram of a sleeve of the present invention;
fig. 3 is a layout with an inclination angle of 15 degrees She Shan in the invention, namely A-A view in fig. 2;
fig. 4 is a layout with an inclination angle of 30 degrees She Shan, namely a view in the direction B-B in fig. 2;
FIG. 5 is a layout of the invention with a 45 degree angle She Shan, namely the C-C view in FIG. 2;
FIG. 6 is a schematic view of the structure of the present invention in an open state;
FIG. 7 is a cloud plot of the relative opening 90% velocity profile of the present invention;
FIG. 8 is a cloud plot of a 90% flow field pressure distribution versus opening in accordance with the present invention;
fig. 9 is a characteristic curve of the flow rate adjustment at different opening degrees according to the present invention.
The specific embodiment is as follows:
the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 6, a three-stage She Shan series swirl sleeve multistage flow-regulating cavitation-preventing valve comprises a valve body 2 and a flow-guiding inner cylinder 6 in the valve body, wherein the valve body 2 and the flow-guiding inner cylinder 6 are integrally cast and formed, a circular seam flow passage is arranged between the valve body 2 and the flow-guiding inner cylinder 6, a sleeve 5 is arranged in the flow-guiding inner cylinder 6, a sealing surface is arranged on the sleeve 5, and the sealing surface is matched and sealed with a sealing ring 7 arranged on the inner wall of an outlet end of the valve body; a plurality of strip-shaped flow passages with different inclinations are formed on the wall of the outlet end of the sleeve 5 through mechanical processing, namely a first vane grid 8, a second She Shan and a third vane grid 10 in sequence; the valve rod 1 of the flow guiding inner cylinder 6 is connected with the inner wall of the sleeve 5 through a crank connecting rod mechanism so as to drive the sleeve 5 to do horizontal reciprocating linear motion.
The inclination angles of the first vane grating 8, the second vane grating She Shan and the third vane grating 10 in the length direction of the sleeve are sequentially increased.
The fluid contacts She Shan with different inclination angles to form different throttling areas, so that the characteristic that the flow regulation is multistage linear flow is achieved.
The method comprises the following steps: the inclination angle of the first vane 8 is 15 degrees, as shown in A-A view in fig. 3; the inclination angle of the second She Shan is 30 degrees, and the view is B-B shown in fig. 4; the inclination angle of the third grid 10 is 45 degrees, as shown in the C-C view of fig. 5. As shown in fig. 6, the inclination angles of the first vane 8, the second vane She Shan and the third vane 10 are respectively 15 degrees, 30 degrees and 45 degrees, the strip-shaped flow passage areas with different inclination angles She Shan are different, fluid gradually enters the first vane 8, the second vane She Shan and the third vane 10 from the circular seam flow passage of the valve body 2, the fluid flow is gradually increased, and the flow regulation of the valve is realized.
The first vane 8, the second She Shan and the third vane 10 are arranged in series, and a plurality of inclined long-strip-shaped flow passages are formed on the wall surface of the sleeve. Fluid enters a circular seam flow passage of the valve body from an inlet, then enters a long strip flow passage of the sleeve through the circular seam flow passage, and is rotationally cut into the sleeve flow passage under the guiding action of She Shan, conical spiral high-speed fluid is formed at the center of an outlet flow passage of the sleeve, the center speed and the pressure of the outlet flow passage are high according to the law of conservation and conversion of energy, the speed and the pressure of a metal wall surface of the flow passage are low, and the cavitation prevention effect of the metal wall surface of the flow passage is realized. When fluid passes through the sleeve, the flow area formed by the inclination change of the three-stage inlet She Shan is different, so that the multistage fluid flow regulating characteristic is formed, the regulating characteristic is improved, and the service life is prolonged.
The crank-link mechanism comprises a crank 3, the crank 3 is connected with a connecting rod 4, the connecting rod 4 is connected with a sliding block 12 through a pin 11, and the sliding block 12 is arranged on the inner wall of the sleeve 5 through an inner hexagon screw 13; the other end of the crank 3 is connected to the small end of the valve stem 1, and the valve stem 1 is driven to rotate by an external driving mechanism. The valve rod 1 transmits the rotary motion to the crank 3 to enable the crank 3 to rotate, the crank 3 rotates to drive the connecting rod 4 to swing, and the connecting rod 4 swings to drive the sliding block 12 so as to drive the sleeve 5 to do horizontal reciprocating linear motion. Specifically: the valve rod 1 moves to enable the sleeve 5 to move rightwards, the sealing surface of the sleeve 5 is contacted with the sealing ring 7, and the valve is closed; the valve rod moves to the left to enable the sleeve 5 to move, the first vane 8, the second She Shan 9 and the third vane 10 on the sleeve 5 are gradually contacted with the circular seam flow passage of the valve body 2, the valve is opened, fluid enters the circular seam flow passage from the inlet of the valve body 2 and then enters a plurality of long strip flow passages with different inclinations of the first vane 8, the second She Shan 9 and the third vane 10 of the sleeve 5, and then flows out of the valve body 2 from the inner flow passage of the sleeve 5, as shown by arrows in fig. 1.
Further, as shown in fig. 6, when the sleeve 5 moves leftwards, the valve is opened, fluid flows into the circular seam flow channel from the inlet of the valve body 2 and then enters the multiple inclined strip flow channels of the sleeve 5, and as the first-stage She Shan, the second-stage She Shan and the third-stage She Shan form inclination angles of 15 degrees, 30 degrees and 45 degrees with the inner wall surface of the sleeve 5, the fluid is guided to enter the inner flow channel of the sleeve 5 tangentially, and a spiral high-speed fluid beam is formed in the center of the flow channel of the sleeve 5 and flows out of the outlet of the valve body 2. According to the law of conservation and conversion of energy, the center speed of the flow channel is high, the pressure is low, the flow velocity of the metal wall surface of the flow channel is low, and the pressure is high, so that the purpose of preventing cavitation on the metal wall surface of the flow channel is realized.
When the three-stage multi-channel inclined strip-shaped flow passage on the sleeve 5 is in full contact with the circular seam flow passage of the valve body 2 as shown in fig. 6, the three-stage She Shan series swirl sleeve multi-stage flow regulating cavitation prevention valve is in a full opening state.
Taking DN300 as an example, a three-stage She Shan series-connection cyclone sleeve multi-stage flow-regulating cavitation-preventing valve, taking warm water as a medium, the inlet speed is 2.6m/s, the outlet pressure is 0.06MPa, and the regulating opening is 148mm. And (3) calculating and solving by using a standard turbulence model by using fluid analysis software and using a SIMPLE algorithm and a windward format with second-order precision, wherein the residual curve precision is set to 10 < -5 >, and the iteration step number is set to 3000 steps.
(1) Cavitation prevention characterization
Fig. 7 and 8 show the fluid characteristic cloud patterns of the present invention. As seen from the streamline cloud chart of fig. 7, the central streamline inside the sleeve is densely distributed and is spiral, which indicates that the central fluid flow velocity of the flow channel is high; the streamline distribution close to the inner wall surface of the sleeve is dense and sparse, which indicates that the flow velocity of the fluid at the wall surface is smaller. As seen from the pressure cloud chart of fig. 8, the internal center pressure of the sleeve is low, the internal wall pressure of the sleeve is high, the internal center fluid pressure of the sleeve is easily lower than the saturated vapor pressure to cause cavitation, and the internal wall pressure of the sleeve is not easily lower than the saturated vapor pressure to prevent cavitation.
(2) Three-level flow characteristic curve
Fig. 9 shows a flow rate regulation characteristic of the present invention. Under the condition that the relative opening is 0-30%, the throttling channel is a first-stage throttling channel formed by She Shan with the inclination angle of 45 degrees and the inner wall of the sleeve 5, and the slope of the flow characteristic curve is 0.285; under the relative opening degree of 40-60%, the throttling channel is a secondary throttling channel formed by She Shan with the inclination angle of 45 degrees, she Shan with the inclination angle of 30 degrees and the inner wall of the sleeve 5, and the slope of the flow characteristic curve is 0.253; under the condition that the relative opening is 60-90%, the throttling channel is a three-stage throttling channel formed by She Shan with the inclination angle of 45 degrees, she Shan with the inclination angle of 30 degrees, she Shan with the inclination angle of 15 degrees and the inner wall of the sleeve 5, and the slope of the flow characteristic curve is 0.253. The three-stage throttling characteristic is realized because the slope of the three-stage flow characteristic curve is different and the adjusting characteristic is different.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover all equivalent structures as modifications within the scope of the invention, either directly or indirectly, as may be contemplated by the present invention.
Claims (4)
1. The utility model provides a multistage accent of tertiary She Shan series connection whirl sleeve flows anti-cavitation valve, includes valve body and inside water conservancy diversion inner tube, has the circumferential weld runner between the two, its characterized in that: a sleeve (5) is arranged in the guide inner cylinder (6), a sealing surface is arranged on the sleeve (5), and the sealing surface is matched and sealed with a sealing ring 7 arranged on the inner wall of the valve body; the wall of the outlet end of the sleeve (5) is sequentially provided with a plurality of strip-shaped flow passages with different inclinations, namely a first vane (8), a second vane (She Shan) (9) and a third vane (10) in sequence; the valve rod (1) of the flow guiding inner cylinder (6) is connected with the inner wall of the sleeve (5) through a crank connecting rod mechanism so as to drive the sleeve (5) to do horizontal reciprocating linear motion.
2. A three-stage She Shan series swirl sleeve multi-stage flow regulating cavitation preventing valve as claimed in claim 1 wherein the inclination angles of the first vane (8), the second vane (She Shan) (9) and the third vane (10) in the sleeve length direction are sequentially increased.
3. The three-stage She Shan series-connection cyclone sleeve multi-stage flow-regulating cavitation-preventing valve according to claim 2, wherein the inclination angles of the first vane (8), the second vane (She Shan) (9) and the third vane (10) are 15 degrees, 30 degrees and 45 degrees in sequence.
4. A three-stage She Shan series swirl sleeve multi-stage flow regulating cavitation preventing valve as claimed in claim 1 wherein the crank linkage mechanism comprises a crank (3), the crank (3) is connected with a connecting rod (4), the connecting rod (4) is connected with a slide block (12) through a pin (11), and the slide block (12) is mounted on the inner wall of the sleeve (5); the other end of the crank (3) is connected with the small end of the valve rod (1), and the valve rod (1) is driven to rotate by an external driving mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310353069.1A CN116412262A (en) | 2023-04-04 | 2023-04-04 | Three-stage She Shan series connection cyclone sleeve multistage flow-regulating cavitation-preventing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310353069.1A CN116412262A (en) | 2023-04-04 | 2023-04-04 | Three-stage She Shan series connection cyclone sleeve multistage flow-regulating cavitation-preventing valve |
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| Publication Number | Publication Date |
|---|---|
| CN116412262A true CN116412262A (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310353069.1A Pending CN116412262A (en) | 2023-04-04 | 2023-04-04 | Three-stage She Shan series connection cyclone sleeve multistage flow-regulating cavitation-preventing valve |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080173363A1 (en) * | 2004-12-30 | 2008-07-24 | Marco Betting | Throttling Valve and Method for Enlarging Liquid Droplet Sizes in the Throttled Fluid Stream |
| CN204716993U (en) * | 2015-06-25 | 2015-10-21 | 上海欧特莱阀门机械有限公司 | A kind of sand and mud proof axial flow control valve |
| CN205401929U (en) * | 2016-03-03 | 2016-07-27 | 上海华电阀门集团有限公司 | Flabellum circle formula piston is transferred and is flowed valve |
| JP2019027566A (en) * | 2017-08-03 | 2019-02-21 | 株式会社栗本鐵工所 | Sleeve valve |
| JP2019027565A (en) * | 2017-08-03 | 2019-02-21 | 株式会社栗本鐵工所 | Sleeve valve |
| CN109798383A (en) * | 2018-12-29 | 2019-05-24 | 广州启云机械有限公司 | A kind of piston type tune flow control valve |
| JP2020153466A (en) * | 2019-03-22 | 2020-09-24 | 株式会社栗本鐵工所 | Sleeve valve with air supply hole |
| CN215891361U (en) * | 2021-09-28 | 2022-02-22 | 赵秋凤 | Flow regulating cylinder and piston type flow regulating valve using same |
-
2023
- 2023-04-04 CN CN202310353069.1A patent/CN116412262A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080173363A1 (en) * | 2004-12-30 | 2008-07-24 | Marco Betting | Throttling Valve and Method for Enlarging Liquid Droplet Sizes in the Throttled Fluid Stream |
| CN204716993U (en) * | 2015-06-25 | 2015-10-21 | 上海欧特莱阀门机械有限公司 | A kind of sand and mud proof axial flow control valve |
| CN205401929U (en) * | 2016-03-03 | 2016-07-27 | 上海华电阀门集团有限公司 | Flabellum circle formula piston is transferred and is flowed valve |
| JP2019027566A (en) * | 2017-08-03 | 2019-02-21 | 株式会社栗本鐵工所 | Sleeve valve |
| JP2019027565A (en) * | 2017-08-03 | 2019-02-21 | 株式会社栗本鐵工所 | Sleeve valve |
| CN109798383A (en) * | 2018-12-29 | 2019-05-24 | 广州启云机械有限公司 | A kind of piston type tune flow control valve |
| JP2020153466A (en) * | 2019-03-22 | 2020-09-24 | 株式会社栗本鐵工所 | Sleeve valve with air supply hole |
| CN215891361U (en) * | 2021-09-28 | 2022-02-22 | 赵秋凤 | Flow regulating cylinder and piston type flow regulating valve using same |
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