CN116928412B - Differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve - Google Patents
Differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve Download PDFInfo
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- CN116928412B CN116928412B CN202310353406.7A CN202310353406A CN116928412B CN 116928412 B CN116928412 B CN 116928412B CN 202310353406 A CN202310353406 A CN 202310353406A CN 116928412 B CN116928412 B CN 116928412B
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 47
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims description 30
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The pressure difference pilot fan blade deflection flow regulating and pressure stabilizing valve is characterized in that a flow guiding inner cylinder is arranged in a main valve body, a circular seam flow passage is formed between the main valve body and the inner wall surface of the main valve body, and a sealing ring is arranged at the wall surface of the circular seam flow passage at the outlet of the valve body; one end of the sleeve is in sliding connection with the flow guiding inner cylinder, a sealing surface is arranged on the periphery of the other end of the sleeve, the sealing surface is matched with the sealing ring for sealing, a plurality of rectangular long-strip through grooves are uniformly formed in the circumferential surface of the sleeve to form a sleeve fluid flow passage, fan blades are rotationally arranged in the rectangular long-strip through grooves to form a sleeve fluid flow passage adjustable channel, the flow area of the sleeve is changed, and the fan blades adjust the rotation angle by pressure difference at an inlet and an outlet of a pilot controller arranged on the sleeve. According to the invention, after the fan blades rotate for a certain angle to displace, a new flow passage overflow area is formed with the plurality of rectangular long flow passage grooves, the flow passage overflow area changes the fluid resistance of the valve, the pressure difference of the inlet flow passage and the outlet flow passage of the valve is changed, the pressure after the valve is ensured to be unchanged, and the purpose of stabilizing the outlet pressure is realized.
Description
Technical Field
The invention relates to the field of valve structural design and pressure regulation, in particular to a differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve.
Background
The flow regulating and pressure regulating valve is one hydraulic control valve for flow regulation and pressure regulation of large hydraulic engineering. The gradient drop of a large hydraulic engineering water supply runner is very high, the input water head (pressure) of the flow regulating and pressure regulating valve is very high, the outlet normally enters a pressure regulating well or is vented, under the working condition, the outlet pressure of the flow regulating and pressure regulating valve must be kept at a constant value or the pressure is very low, and particularly when the outlet pressure of a valve is very low, cavitation occurs in the outlet section of the valve or a downstream pipeline, so that the outlet pressure of the flow regulating and pressure regulating valve is required to be ensured to be larger than the critical cavitation pressure or a specific pressure value. Cavitation can also be accompanied by noise and vibration, resulting in failure of the valve seal or fatigue failure due to distortion of the regulating function. The existing flow regulating valve basically can meet the flow regulating function, but cannot ensure that the pressure at the outlet end of the valve reaches a specific value or is higher than the critical cavitation pressure.
Disclosure of Invention
The invention provides a differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve, which enables the flow regulating valve to have a pressure regulating function, enables the pressure at the outlet end of the valve to be kept at a constant value and be larger than the critical cavitation pressure of the valve, and prolongs the service life of the valve.
The technical scheme adopted by the invention is as follows:
the pressure difference pilot fan blade deflection flow regulating and pressure stabilizing valve is characterized in that a flow guiding inner cylinder is arranged in a main valve body, a circular seam flow passage is formed between the main valve body and the inner wall surface of the main valve body, and a sealing ring is arranged at the wall surface of the circular seam flow passage at the outlet of the valve body; one end of the sleeve is in sliding connection with the flow guiding inner cylinder, a sealing surface is arranged on the periphery of the other end of the sleeve, the sealing surface is matched with the sealing ring for sealing, a plurality of rectangular long-strip through grooves are uniformly formed in the circumferential surface of the sleeve to form a sleeve fluid flow passage, fan blades are rotationally arranged in the rectangular long-strip through grooves to form a sleeve fluid flow passage adjustable channel, the flow area of the sleeve is changed, and the fan blades adjust the rotation angle by pressure difference at an inlet and an outlet of a pilot controller arranged on the sleeve.
The rotation mounting structure of the fan blade is as follows: a sleeve cover plate is arranged on a sleeve at a rectangular through groove close to the fluid inlet side, a pilot controller is arranged on the sleeve cover plate, an inlet joint of the pilot controller is communicated with an inlet connecting pipe, an outlet joint of the pilot controller is communicated with an outlet connecting pipe, a valve rod of the pilot controller is connected with a rotary disc through a second crank connecting rod mechanism, U-shaped shifting forks are uniformly distributed on the periphery of the rotary disc, U-shaped grooves of the U-shaped shifting forks are connected with rotating shafts of the fan blades, and the rotary disc is arranged on the sleeve cover plate.
The pilot controller mainly comprises a piston and a valve rod, wherein the piston is arranged in the auxiliary valve body, the small end of the piston is contacted with the upper surface of a spring seat at the upper end of the piston, the lower surface of the spring seat at the upper end of the piston is connected with the valve rod, the spring is sleeved on the valve rod and limited by the upper and lower spring seats, the other end of the valve rod extends out of the valve cover and is connected with a second crank-connecting rod mechanism after being connected with an adjusting nut, and the second crank-connecting rod mechanism is connected with the turntable; and the adjusting nut and the valve cover are in threaded connection and press on the lower surface of the spring seat at the lower end.
The flow regulating method of the differential pressure pilot fan blade displacement flow regulating and pressure stabilizing valve comprises the steps that the inlet pressure of a main valve body is P1, the outlet pressure is P2, the small end face of a piston of a pilot controller is acted by the inlet pressure P1 of the valve and the acting force of a spring, the large end face of the piston is acted by the outlet end pressure P2 of the valve, an inlet and an outlet of the valve are kept under set differential pressure P1-P2, and the piston is in a balance position under a certain opening degree; when the inlet pressure P1 of the valve changes, the piston linearly displaces under the action of the inlet pressure P1, the spring and the outlet end pressure P2 and then transmits the linear displacement to a second crank-link mechanism through a valve rod of a pilot controller, the second crank-link mechanism drives a turntable to rotate by an angle beta, the turntable drives a U-shaped shifting fork to rotate, the U-shaped shifting fork drives a movable fan blade to rotate, the width of a through groove of a plurality of rectangular long strips is changed from a to b after the fan blade rotates by a certain angular displacement theta, and a is more than b, so that a new flow passage overflow area is formed; the flow area of the rectangular long flow channels changes the pressure difference between the inlet and outlet flow channels of the valve and keeps the pressure unchanged after the valve, thereby realizing the purpose of stabilizing the outlet pressure.
The invention makes the flow regulating valve have pressure regulating function, namely, the flow regulating and pressure regulating functions are simultaneously provided, so that the pressure at the outlet end of the valve is kept at a constant value and is larger than the critical cavitation pressure of the valve, and the service life of the valve is prolonged. The invention is suitable for large-scale hydraulic engineering.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the open state structure of the present invention;
FIG. 3 is a schematic view of the sleeve and connecting rod of the present invention;
FIG. 4 is a schematic view of the mounting structure of the sleeve and the pilot controller of the present invention;
FIG. 5 is a schematic view of the vertical position of the fan blade and the wall surface of the sleeve, namely, A-A in FIG. 4;
FIG. 6 is a schematic diagram of a pilot controller according to the present invention;
FIG. 7 is a schematic view of the structure of the fan blade with an angular displacement θ according to the present invention;
FIG. 8 is a schematic view of a fan blade according to the present invention;
FIG. 9 is a schematic view of the structure of the U-shaped fork of the present invention;
FIG. 10 is a flow coefficient curve of DN2000 differential pressure pilot vane displacement flow regulating and stabilizing valve;
fig. 11 is a pressure cloud graph distribution of 90% of the relative opening of the DN2000 differential pressure pilot fan blade displacement flow regulating and stabilizing valve, wherein (a) the fan blade angular displacement is 0, (b) the fan blade angular displacement is 15 degrees, (c) the fan blade angular displacement is 30 degrees, and (d) the fan blade angular displacement is 45 degrees.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in figure 1, a differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve is characterized in that a flow guiding inner cylinder 32 is arranged in a main valve body 2, a circular seam flow passage is formed between the main valve body 2 and the inner wall surface of the main valve body, and a sealing ring 9 is arranged at the wall surface of the circular seam flow passage of an outlet of the valve body. The guide inner cylinder 32 is internally provided with a sleeve 6, and a sealing surface is arranged on the sleeve 6. The guide inner cylinder 32 is internally provided with a main valve rod 1, the main valve rod 1 is connected with a first crank 4, the first crank 4 is connected with a first connecting rod 5, and the first connecting rod 5 is connected with a sleeve 6 through a pin shaft 31, as shown in fig. 3. The external driving device drives the main valve rod 1 to rotate and drives the first crank 4 to rotate, and the first crank 4 drives the first connecting rod 5 to swing and drives the sleeve 6 to do horizontal reciprocating motion. When the sleeve 6 moves to the right, its sealing surface contacts the sealing ring 9 and the valve closes as shown in fig. 1. When the sleeve 6 moves to the left, its sealing surface disengages from the sealing ring 9 and the valve opens as shown in fig. 2.
As shown in fig. 4, a plurality of rectangular long through grooves are formed in the sleeve 6, and fan blades 11 capable of angular displacement are installed in the rectangular long through grooves, as shown in fig. 5. When the sleeve 6 moves leftwards, the valve is opened, and fluid flows in from the inlet, enters a plurality of rectangular long strip through grooves of the sleeve 6 through the circular seam flow passage of the main valve body 2 and flows out from the outlet. When the circular seam flow passage of the main valve body 2 and the rectangular long strip through grooves of the sleeve 6 are positioned at different contact positions, the fluid flow area changes, and the flow regulating effect of the valve is realized.
As shown in fig. 1 and 6, a pilot controller 13 is mounted on a sleeve side cover 28 through a bolt 14, the specific structure of the pilot controller 13 is shown in fig. 6, a piston 21 is mounted in a secondary valve body 23 of the pilot controller 13, the small end of the piston 21 is in contact with the upper surface of a spring seat at the upper end, the lower surface of the spring seat at the upper end is connected with a valve rod 17, a spring 19 is sleeved on the valve rod 17 and limited by the upper and lower spring seats, the other end of the valve rod 17 extends out of a valve cover 25 and is connected with a second crank-connecting rod mechanism after being connected with an adjusting nut 18, and the second crank-connecting rod mechanism is connected with a turntable 8; and the adjusting nut 18 and the valve cap 25 are screwed and pressed against the lower surface of the spring seat at the lower end.
The second crank-link mechanism comprises a second link 15 and a second crank 16, the turntable 8 is arranged on a sleeve side cover 28 through a shaft 26 and a bolt 27, the turntable 8 is provided with a U-shaped shifting fork 10, and the structure of the U-shaped shifting fork 10 is shown in figure 9. The cylinder at the end of the blade 11 is inserted into the U-shaped opening of the U-shaped fork 10, and the blade 11 is constructed as shown in FIG. 8. The valve rod 17 of the pilot controller 13 is connected to the second link 15, the second link 15 is connected to the second crank 16, and the second crank 16 is connected to the shaft 26, as shown in fig. 5.
The rotation adjusting nut 18 applies pressure to the spring seat and transmits the pressing force to the spring 19, and the spring 19 transmits the pressing force to the piston 21 through the valve rod 17, thereby changing the medium force applied to the large end surface and the small end surface of the piston 21, and adjusting the force applied to the piston 21. The inlet connector 20 and the outlet connector 22 are connected to the sub-valve body 23 by threads, respectively. The inlet connection 20 is connected to the inlet connection 3 and the outlet connection 22 is connected to the outlet connection 12.
The undescribed structure of the pilot control 13 is the same as the prior art.
As shown in fig. 1, 6 and 7, in a flow regulating method of a differential pressure pilot fan blade displacement flow regulating and stabilizing valve, an inlet connecting pipe 3 of a pilot controller 13 is communicated with an inlet of a main valve body 2, and the inlet pressure of the main valve body 2 is P1; the outlet connection pipe 12 is communicated with the outlet of the main valve body 2, and the outlet pressure is P2. The small end face of the piston 21 of the pilot controller 13 receives the valve inlet pressure P1 and the acting force of the spring 19, the large end face of the piston 21 receives the valve outlet pressure P2, the valve inlet and outlet are kept under the set pressure difference (P1-P2), and the piston 21 is in the balance position under a certain opening degree. When the inlet pressure P1 of the valve changes, the piston 21 linearly displaces under the action of the inlet pressure P1, the spring 19 and the outlet end pressure P2 and then transmits the linear displacement to the second connecting rod 15 through the valve rod 17 of the pilot controller, the second connecting rod 15 drives the second crank 16 to swing, the second crank 16 drives the rotary disc 8 to rotate by an angle beta through the shaft 26, the rotary disc 8 drives the U-shaped shifting fork 10 to rotate, the U-shaped shifting fork 10 shifts the movable fan blade 11 to rotate, the width of the fan blade 11 and the width of the rectangular long runner grooves are changed from a of fig. 5 to b of fig. 7, a is larger than b, and a new runner flow area is formed, as shown in fig. 7. The flow area of the rectangular long flow channels changes the pressure difference between the inlet and outlet flow channels of the valve and keeps the pressure unchanged after the valve, thereby realizing the purpose of stabilizing the outlet pressure.
The working process of the invention is as follows: the main valve rod 1 rotates, the rotary motion is transmitted to the first crank and the first connecting rod, the first connecting rod drives the sleeve to linearly move, and a plurality of rectangular long strip through holes on the sleeve and the circular seam flow passage of the valve body form different fluid flow passing areas, so that the flow regulating effect of the valve is realized. The pilot controller is arranged on the cover plate on the side surface of the sleeve, the small end surface of the piston of the pilot controller acts on the pressure of the inlet end and the spring force of the valve, the large end surface of the piston acts on the pressure of the outlet end of the valve, the valve is at a balance position under a certain opening degree, and the inlet and outlet of the valve are kept under a set pressure difference; when the inlet pressure of the valve changes, the piston transfers the linear displacement to the second connecting rod to swing through the valve rod of the pilot controller after the displacement under the action of the inlet pressure, the spring force and the outlet pressure of the valve, the second connecting rod drives the second crank to rotate, the second crank drives the rotary table to rotate, the rotary table drives the U-shaped shifting fork to rotate, the U-shaped shifting fork shifts the movable fan blade to rotate, a new flow passage overflow area is formed between the fan blade and a plurality of rectangular strip through holes after the fan blade rotates for a certain angle displacement, the flow resistance of the valve is changed by the overflow area, the pressure difference between the inlet and outlet flow passages of the valve is changed, the pressure after the valve is ensured to be unchanged, and the purpose of stabilizing the outlet pressure is realized.
Taking DN2000 differential pressure pilot fan blade deflection flow regulating pressure stabilizing valve as an example, taking warm water as a medium, the inlet speed is 2.6m/s, the outlet pressure is 0.06MPa, and the regulating opening is 588mm. 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) Flow regulating characteristic curve
Table 1 shows flow coefficient calculation tables of different relative opening degrees of DN2000 differential pressure pilot fan blade deflection flow regulating and stabilizing valves and different angular displacements of fan blades, and FIG. 10 shows flow characteristic curve tables of different relative opening degrees of DN2000 differential pressure pilot fan blade deflection flow regulating and stabilizing valves and different angular displacements of fan blades. As shown in table 1 and fig. 10, the flow coefficient of the DN2000 differential pressure pilot vane displacement flow regulating and stabilizing valve increases with the increase of the relative opening degree of the valve, and decreases with the increase of the vane angular displacement, the flow characteristic curve is linear, and the flow characteristic curves of different vane angular displacement are different.
(2) Voltage stabilization characteristic analysis
Fig. 11 shows a pressure cloud diagram distribution diagram of a DN2000 differential pressure pilot fan blade displacement flow regulating and stabilizing valve, wherein fig. (a) is a pressure cloud diagram with a fan blade angular displacement of 0, fig. (b) is a pressure cloud diagram with a fan blade angular displacement of 15 degrees, fig. (c) is a pressure cloud diagram with a fan blade angular displacement of 30 degrees, and fig. (d) is a pressure cloud diagram with a fan blade angular displacement of 45 degrees. Table 2 shows the inlet pressure, outlet pressure and differential pressure results for DN2000 differential pressure pilot vane displacement flow regulating and stabilizing valves with different opening degrees and different angular displacements. As shown in FIG. 11 and Table 2, when the inlet water flow rate of the DN2000 differential pressure pilot fan blade deflection flow regulating pressure stabilizing valve is 2.6m/s, the inlet pressure change range is 6.51 MPa-0.18 MPa, the outlet pressure is basically 0.06MPa, the differential pressure change range is 6.47 MPa-0.12 MPa, the outlet pressure is kept stable at 0.06MPa, the inlet pressure and the outlet pressure are both greater than the saturated vapor pressure of water at normal temperature (the saturated vapor pressure of water at 25 ℃ is 0.0031 MPa), and cavitation cannot occur.
Table 1 DN2000 differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve flow coefficient calculation result
Table 2DN2000 differential pressure pilot vane deflection flow regulating and pressure stabilizing valve pressure calculation result unit: MPa (MPa)
Note that: p1 is the inlet pressure, P2 is the outlet pressure,is the pressure difference between the inlet and the outlet
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 (2)
1. The pressure difference pilot fan blade deflection flow regulating and pressure stabilizing valve is characterized in that a flow guiding inner cylinder is arranged in a main valve body, a circular seam flow passage is formed between the main valve body and the inner wall surface of the main valve body, and a sealing ring is arranged at the wall surface of the circular seam flow passage at the outlet of the valve body; one end of the sleeve is in sliding connection with the flow guiding inner cylinder, the periphery of the other end of the sleeve is provided with a sealing surface which is matched with the sealing ring for sealing, the flow guiding inner cylinder is characterized in that a plurality of rectangular long through grooves are uniformly formed in the circumferential surface of the sleeve (6) to form a fluid flow passage of the sleeve (6), fan blades (11) are rotationally arranged in the rectangular long through grooves to form a fluid flow passage adjustable passage of the sleeve so as to change the flow passage area of the sleeve (6), and the fan blades (11) adjust the rotation angle by pressure difference at an inlet and an outlet of a pilot controller (13) arranged on the sleeve (6); the rotation mounting structure of the fan blade (11) is as follows: a sleeve cover plate (28) is arranged on a sleeve (6) at a rectangular through groove near the fluid inlet side, a pilot controller (13) is arranged on the sleeve cover plate (28), an inlet joint (20) of the pilot controller (13) is communicated with an inlet connecting pipe (3), an outlet joint (22) is communicated with an outlet connecting pipe (12), a valve rod (17) of the pilot controller (13) is connected with a rotary table (8) through a second crank connecting rod mechanism, U-shaped shifting forks (10) are uniformly distributed on the periphery of the rotary table (8), the U-shaped grooves of the U-shaped shifting forks (10) are connected with rotating shafts of the fan blades (11), and the rotary table (8) is arranged on the sleeve cover plate (28); the pilot controller (13) mainly comprises a piston (21) and a valve rod (17), wherein the piston (21) is arranged in a secondary valve body (23), the small end of the piston (21) is in contact with the upper surface of a spring seat at the upper end, the lower surface of the spring seat at the upper end is connected with the valve rod (17), a spring (19) is sleeved on the valve rod (17) and limited by the upper and lower spring seats, the other end of the valve rod (17) extends out of a valve cover (25) and an adjusting nut (18) and then is connected with a second crank-connecting rod mechanism, and the second crank-connecting rod mechanism is connected with a turntable (8); and the adjusting nut (18) and the valve cover (25) are in threaded connection and press on the lower surface of the spring seat at the lower end.
2. The flow regulating method of the differential pressure pilot fan blade displacement flow regulating and stabilizing valve according to claim 1, wherein the inlet pressure of the main valve body (2) is P1, the outlet pressure is P2, the small end face of the piston (21) of the pilot controller (13) is acted by the inlet pressure P1 of the valve and the acting force of the spring (19), the large end face of the piston (21) is acted by the outlet end pressure P2 of the valve, the inlet and outlet of the valve are kept under the set differential pressure P1-P2, and the piston (21) is at the balance position under a certain opening degree; when the inlet pressure P1 of the valve changes, the piston (21) linearly displaces under the action of the inlet pressure P1, the spring (19) and the outlet end pressure P2 and then transmits the linear displacement to a second crank-link mechanism through a valve rod (17) of a pilot controller, the second crank-link mechanism drives a rotary table (8) to rotate by an angle beta, the rotary table (8) drives a U-shaped shifting fork (10) to rotate, the U-shaped shifting fork (10) drives a movable fan blade (11) to rotate, the width of the fan blade (11) and the width of a plurality of rectangular long strip through grooves are changed from a to b, and a is larger than b, so that a new flow passage overflow area is formed; the flow area of the rectangular long flow channels changes the pressure difference between the inlet and outlet flow channels of the valve and keeps the pressure unchanged after the valve, thereby realizing the purpose of stabilizing the outlet pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310353406.7A CN116928412B (en) | 2023-04-04 | 2023-04-04 | Differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310353406.7A CN116928412B (en) | 2023-04-04 | 2023-04-04 | Differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve |
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| Publication Number | Publication Date |
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| CN116928412A CN116928412A (en) | 2023-10-24 |
| CN116928412B true CN116928412B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310353406.7A Active CN116928412B (en) | 2023-04-04 | 2023-04-04 | Differential pressure pilot fan blade deflection flow regulating and pressure stabilizing valve |
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| CN215059936U (en) * | 2021-03-23 | 2021-12-07 | 远大阀门集团有限公司 | Flow regulating valve |
| CN215806337U (en) * | 2021-10-12 | 2022-02-11 | 武汉首水机械设备有限公司 | Flow-regulating pressure-regulating valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPQ458499A0 (en) * | 1999-12-13 | 2000-01-13 | F F Seeley Nominees Pty Ltd | Anti-backdraft shutter assembly for an axial flow fan as fitted to an evaporative cooler |
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2023
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470798A (en) * | 2013-08-13 | 2013-12-25 | 浙江盾安阀门有限公司 | Axial flow type flow quantity control valve with dual filtering function |
| 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 |
| CN110906035A (en) * | 2019-11-16 | 2020-03-24 | 苏州安特威阀门有限公司 | Self-controlled flow regulating valve |
| CN215059936U (en) * | 2021-03-23 | 2021-12-07 | 远大阀门集团有限公司 | Flow regulating valve |
| CN113090774A (en) * | 2021-05-12 | 2021-07-09 | 上海冠龙阀门节能设备股份有限公司 | Axial flow type fixed cone valve |
| CN215806337U (en) * | 2021-10-12 | 2022-02-11 | 武汉首水机械设备有限公司 | Flow-regulating pressure-regulating valve |
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| Publication number | Publication date |
|---|---|
| CN116928412A (en) | 2023-10-24 |
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