CN209340594U - Minimum flow regulating valve - Google Patents
Minimum flow regulating valve Download PDFInfo
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- CN209340594U CN209340594U CN201822195872.4U CN201822195872U CN209340594U CN 209340594 U CN209340594 U CN 209340594U CN 201822195872 U CN201822195872 U CN 201822195872U CN 209340594 U CN209340594 U CN 209340594U
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Abstract
The problem of a kind of minimum flow regulating valve, solves that valve base sealing structure erosive wear of the existing technology is serious, and medium often leaks outside, and situations such as valve rod bending, vibration easily occurs, influences normal use.Including valve body and valve deck, it is characterised in that: the side of the valve chamber of valve inner is connected with valve inlet；The inlet for the multi-stage vortex guided seat upper end being arranged in valve chamber is communicated with valve chamber, and the liquid outlet of multi-stage vortex guided seat lower end is connected with valve outlet；Drive leader is arranged in activity setting multi-stage vortex line style valve rod in the central cavity of multi-stage vortex guided seat, the upper end of multi-stage vortex line style valve rod, and the upper end that drive leader passes through valve deck is connected with driving device.Phenomena such as it is designed rationally, compact-sized, and cavitation, noise, corrosion can be eliminated by the control to velocity of medium avoids medium directly washing away to sealing structure, and valve rod deflection is few, with small vibration, can effectively prevent the leakage of medium.
Description
Technical field
The utility model belongs to water supply pump discharge regulation technology field, and in particular to one kind can pass through the control to velocity of medium
Phenomena such as making to eliminate cavitation, noise, corrosion avoids medium directly washing away to sealing structure, and valve rod deflection is few, vibrates
Minimum flow regulating valve small, that medium can be effectively prevent to leak outside.
Background technique
In thermoelectricity, nuclear power, biomass electricity, oil refining and Fine Chemical Works, the installation of high-low pressure feed pump pipeline exit
Minimum flow regulating valve, minimum flow regulating valve is mainly used for adjusting the size of rate-of flow, and has decompression and overflow effect.
When feed pump is run lower than minimum discharge, water is flowed back into oxygen-eliminating device by minimum flow valve, is recycled by feed pump
The entrance feedwater flow for increasing feed pump, to guarantee that feed pump can be operated normally in minimum discharge, and then prevents feed pump
Overheat guarantees that water pump is normally continuously safely operated.Meanwhile when water supply pump discharge is greater than minimum discharge and has certain surplus, most
Control valve for small flows can also flow back excess traffic oxygen-eliminating device, economize on resources, and improve efficiency.However, due to flow control valve
Pressure difference when work is larger, and the erosive wear situation of the valve base sealing structure of the minimum flow regulating valve of existing structure is more serious,
Medium often leaks outside；Also, easily there is situations such as valve rod bending, vibration in spool operation, influence flow control valve
Normal use.Therefore it is necessary to the structures of the minimum flow regulating valve to the prior art to be improved.
Utility model content
The utility model aiming at the above problem, provide it is a kind of can be eliminated by the control to velocity of medium cavitation,
Phenomena such as noise, corrosion, avoids medium directly washing away to sealing structure, and valve rod deflection is few, with small vibration, can effectively prevent
The minimum flow regulating valve of medium leakage.
The technical scheme adopted by the utility model is the minimum flow regulating valve includes valve body and valve deck, feature exists
In: the valve inner is provided with valve chamber, and the valve inlet being arranged on the side of valve chamber and valve body is connected；Setting in the valve chamber
There is the multi-stage vortex guided seat arranged vertically, the inlet of multi-stage vortex guided seat upper end is communicated with valve chamber, multi-stage vortex
The liquid outlet of guided seat lower end is then connected with the valve outlet being arranged on valve body；Also, the middle part of multi-stage vortex guided seat
Multi-stage vortex line style valve rod is movably set in cavity, the upper end of multi-stage vortex line style valve rod is provided with drive leader, and driving is led
The upper end that bar passes through valve deck is connected with driving device；Be provided with sealing cover between on the upside of drive leader and valve deck, drive leader with
Guide ring is provided between on the downside of valve deck.
The multi-stage vortex guided seat is made of valve seat body, is provided with the multistage whirlpool arranged vertically in the middle part of valve seat body
Flow chamber；Diversion trench is provided at the inlet of multi-stage vortex guided seat upper end, the lower end of diversion trench is provided with sealing surface.With
Stablize flow velocity by the multi-stage vortex chamber of multi-stage vortex guided seat and lower pressure medium, guarantees constant flow rate；And it utilizes
The diversion trench of multi-stage vortex guided seat upper end setting, to prevent sealing surface from being washed away repeatedly by water and impurity.
The top of the valve seat body outer wall of the multi-stage vortex guided seat is provided with the outboard diversion face of inclination arrangement.
To guide the flow direction for entering the liquid inside valve chamber from valve inlet.
The multi-stage vortex line style valve rod is made of stem body, and several groups cloth along the vertical direction is provided on stem body
The location sealing flange set, correspondingly, the multi-stage vortex of the multi-stage vortex guided seat is intracavitary, with multi-stage vortex line style valve rod
On the corresponding position of each location sealing flange, be respectively arranged with pilot seal bulge loop；And stem body top, with multistage whirlpool
The position that stream guided seat diversion trench is in contact is provided with sealing surface, and the upper end of stem body is connected with the lower end of drive leader.
To utilize each location sealing flange on multi-stage vortex line style valve rod, with the pilot seal bulge loop in multi-stage vortex guided seat
Cascaded coordination, to play the role of guiding and positioning；Meanwhile sealing surface damage, not can guarantee sealing tightness the case where
Under, which can also play multi-stage sealed effect, effectively promote the ability of flow control valve antiscour and cavitation erosion.
In valve chamber space outside the top of the multi-stage vortex guided seat, multi-stage vortex line style valve rod upper end, setting
There is multi-level flow equalization cover；Multi-level flow equalization cover is made of inside cover, and stream chamber, inside cover top are provided in the middle part of the cover of inside
Side wall on be provided with the equal tap hole of decompression；The outer cover of the inside cover is equipped with outside cover, the side of outside cover lower part
Be provided with the equal inflow hole of decompression on wall, and the equal inflow hole of the decompression and depressurize equal tap hole, by outside mask body Nei Bi with it is interior
The labyrinth flow-path being arranged between the external wall of side cover is connected.With what is depressurized using the realization of the multi-level flow equalization cover of double-layer structure and flowed
Effect, and prevent water vapor from generating by the immixture of labyrinth flow-path；At the same time it can also effective impurity screening, extension makes
Use the service life.
The upper end that the drive leader passes through valve deck is provided with damping device, the bracket being arranged above damping device and valve deck
It is connected；Damping device includes the leader nut that drive leader upper end is arranged in, and leader nut is slidably arranged in the inside of bracket,
And the top of leader nut is connected by butterfly spring with the top of bracket.To drive drive leader and multistage whirlpool in driving device
During streamlined valve rod quick acting, using the sliding of drive leader end leader nut, to reduce vibration, and prevent from driving
The case where dynamic guide rod and leader nut fault；Meanwhile the impact force that butterfly spring can be moved repeatedly with buffered-display driver guide rod.
The utility model has the beneficial effects that since the utility model is using the valve body for being internally provided with valve chamber, the side of valve chamber
The valve inlet being arranged in portion and valve body is connected；The multi-stage vortex guided seat that setting is arranged vertically in valve chamber, multi-stage vortex are led
It is communicated to the inlet of valve seat upper end with valve chamber, the valve outlet being arranged on the liquid outlet and valve body of multi-stage vortex guided seat lower end
It is connected；Activity setting multi-stage vortex line style valve rod, multi-stage vortex line style valve rod in the central cavity of multi-stage vortex guided seat
Upper end be arranged drive leader, drive leader pass through valve deck upper end be connected with driving device；Drive leader and valve deck upside
Between sealing cover is set, on the downside of drive leader and valve deck between the structure type of guide ring is set, so its design is rationally, structure is tight
Phenomena such as gathering, cavitation, noise, corrosion can be eliminated by the control to velocity of medium, avoids medium to the direct of sealing structure
It washes away, valve rod deflection is few, with small vibration, can effectively prevent the leakage of medium.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the utility model.
Fig. 2 is a kind of structural schematic diagram of the multi-stage vortex guided seat in Fig. 1.
Fig. 3 is a kind of structural schematic diagram of the multi-stage vortex line style valve rod in Fig. 1.
Fig. 4 is a kind of structural schematic diagram of the multi-level flow equalization cover in Fig. 1.
Fig. 5 is that the drive leader in Fig. 1 drives multi-stage vortex line style valve rod to move up, a kind of of valve opening uses shape
State schematic diagram.
Number explanation in figure: 1 valve body, 2 valve decks, 3 valve chambers, 4 valve inlets, 5 valve outlets, 6 multi-stage vortex guided seats, more than 7
Grade vortex line style valve rod, 8 multi-level flow equalization covers, 9 guide rings, 10 maze troughs, 11 sealing covers, 12 brackets, 13 damping devices, 14 butterflies
Spring, 15 leader nuts, 16 airtight and watertight paddings, 17 drive leaders, 18 valve seat bodies, 19 multi-stage vortex chambers, 20 sealing surfaces, 21 water conservancy diversion
Slot, 22 outboard diversion faces, 23 pilot seal bulge loops, 24 stem bodies, 25 location sealing flanges, 26 outside covers, 27 inside covers
Chamber is flowed in body, 28 labyrinth flow-paths, the equal inflow hole of 29 decompressions, the equal tap hole of 30 decompressions, 31.
Specific embodiment
The specific structure of the utility model is described in detail according to Fig. 1~5.The minimum flow regulating valve includes being internally provided with
The valve body 1 of valve chamber 3, the top of valve body 1 are provided with valve deck 2, wherein are arranged on the side of 1 inside valve chamber 3 of valve body and valve body 1
Valve inlet 4 is connected.The multi-stage vortex guided seat 6 arranged vertically is provided in valve chamber 3, multi-stage vortex guided seat 6 is by valve
Seat main body 18 is constituted, and is provided with the multi-stage vortex chamber 19 arranged vertically in the middle part of valve seat body 18；Multi-stage vortex guided seat 6 it is more
The inlet of 19 upper end of grade vortex cavity is communicated with valve chamber 3, and 19 lower end of multi-stage vortex chamber of multi-stage vortex guided seat 6 goes out liquid
Mouthful, then it is connected with the valve outlet 5 being arranged on valve body 1.Diversion trench is provided at the inlet of 6 upper end of multi-stage vortex guided seat
21, the lower end of diversion trench 21 is provided with the sealing surface that built-up welding Si Taili hard alloy (such as: cobalt chromium tungsten hard alloy) is formed
20.And then stablize flow velocity by the multi-stage vortex chamber 19 of multi-stage vortex guided seat 6 and lower pressure medium, guarantee steady flow
Amount；And using the diversion trench 21 of 6 upper end of multi-stage vortex guided seat setting, to prevent sealing surface 20 from being rushed repeatedly by water and impurity
Brush.
In the multi-stage vortex chamber 19 at 6 middle part of multi-stage vortex guided seat, it is movably set with multi-stage vortex line style valve rod 7, it is more
Grade vortex line style valve rod 7 is made of stem body 24, and the positioning that several groups are arranged in a vertical direction is provided on stem body 24
Sealing flange 25.Correspondingly, in the multi-stage vortex chamber 19 of multi-stage vortex guided seat 6, with it is each on multi-stage vortex line style valve rod 7
The corresponding position of a location sealing flange 25, is respectively arranged with pilot seal bulge loop 23.Also, multi-stage vortex line style valve rod 7
24 top of stem body, at the position that is in contact with 6 diversion trench 21 of multi-stage vortex guided seat, it is hard to be provided with built-up welding Si Taili
The sealing surface 20 that matter alloy is formed；To improve the antiscour of sealing surface 20 and the ability of cavitation erosion.To utilize multi-stage vortex line style
Each location sealing flange 25 on valve rod 7, the cascaded coordination with the pilot seal bulge loop 23 in multi-stage vortex guided seat 6 come
Play the role of guiding and positioning；Meanwhile in the case where the damage of sealing surface 20, not can guarantee sealing tightness, the cooperation knot
Structure can also play multi-stage sealed effect, further promote the ability of flow control valve antiscour and cavitation erosion.
In 3 space of valve chamber outside the top of multi-stage vortex guided seat 6,7 upper end of multi-stage vortex line style valve rod, it is provided with
For playing the multi-level flow equalization cover 8 of decompression and current balance function.Multi-level flow equalization cover 8 is made of inside cover 27, in inside cover 27
Portion is provided with stream chamber 31, and stream chamber 31 is connected with the multi-stage vortex chamber 19 of lower section multi-stage vortex guided seat 6；Inside cover
The equal tap hole 30 of decompression being connected with stream chamber 31 is provided on the side wall on 27 tops.The outer cover of inside cover 27 is equipped with outer
Side cover body 26 is provided with the equal inflow hole 29 of the decompression being connected with valve chamber 3 on the side wall of 26 lower part of outside cover；And decompression is flowed
Enter hole 29 and pass through the labyrinth flow-path 28 being arranged between 27 outer wall of 26 inner wall of outside cover and inside cover, with the equal tap hole 30 of decompression
It is connected.With the effect realizing decompression using the multi-level flow equalization cover 8 of double-layer structure and flowing, and pass through the mixing of labyrinth flow-path 28
Effect is to prevent water vapor from generating；At the same time it can also effective impurity screening, extend the service life of regulating valve.For guidance from
Valve inlet 4 enters the purpose of the liquid flow direction inside valve chamber 3,18 outer wall of valve seat body of multi-stage vortex guided seat 6
Top, be provided with the outboard diversion face 22 of inclination arrangement；So that liquid is flowed to 8 direction of multi-level flow equalization cover.
The upper end of the stem body 24 of multi-stage vortex line style valve rod 7 is provided with drive leader 17, and drive leader 17 passes through valve
The upper end of lid 2 is connected with the driving device (such as: Electric Actuator) for driving multi-stage vortex line style valve rod 7 to act.It drives
The upper end that dynamic guide rod 17 passes through valve deck 2 is provided with damping device 13, and the bracket 12 being arranged above damping device 13 and valve deck 2 is connected
It connects.Damping device 13 includes the leader nut 15 that 17 upper end of drive leader is arranged in, and leader nut 15 is slidably arranged in bracket
12 inside；Meanwhile the top of leader nut 15 is connected by butterfly spring 14 with the top of bracket 12.And then it is filled in driving
It sets and drives drive leader 17 and multi-stage vortex line style valve rod 7 together during quick acting, led using 17 end of drive leader
The sliding of stem nut 15, to reduce vibration, and the case where prevent 15 fault of drive leader 17 and leader nut；And butterfly spring 14
The impact force that can be moved repeatedly with buffered-display driver guide rod 17.
Drive leader 17 and valve deck are provided with sealing cover 11, the inside of sealing cover 11,17 outer wall of drive leader between 2 upside
Between 2 through-hole of valve deck, it is provided with airtight and watertight padding 16 made of graphite or polytetrafluoroethylene material, with the close of lift-off seal lid 11
Sealing property.Between 2 downside of drive leader 17 and valve deck, it is provided with the guide ring 9 for positioning valve rod；9 top of guide ring, driving
It is provided with maze trough 10 between 2 through-hole of 17 outer wall of guide rod and valve deck, so that liquid medium is full of maze trough 10 and then forms vacuum,
Reduce liquid medium to the active force of airtight and watertight padding 16, reduces the risk of 16 aging of airtight and watertight padding in operational process, medium leakage.
In use, the minimum flow regulating valve to be mounted on to the exit of high-low pressure feed pump pipeline, when feed pump is lower than
When minimum discharge is run, driving device drives drive leader 17 and multi-stage vortex line style valve rod 7 to move upwards, thus opening valve
Door, liquid medium utilize the outboard diversion face of multi-stage vortex guided seat 6 out of valve inlet 4 enters valve body 1 valve chamber 3
22, the equal inflow hole 29 of the decompression that liquid medium water conservancy diversion is entered into multi-level flow equalization cover 8；With real by the multi-level flow equalization cover 8 of double-layer structure
The effect for now depressurizing and flowing.Equal tap hole 30, which is depressurized, via multi-level flow equalization cover 8 is flowed into the liquid medium flowed in chamber 31, from
The diversion trench 21 of 6 upper end of multi-stage vortex guided seat flows in multi-stage vortex chamber 19, finally under multi-stage vortex guided seat 6
The liquid outlet at end is flowed out from valve outlet 5；Meanwhile each location sealing flange 25 on multi-stage vortex line style valve rod 7, with multi-stage vortex
The cascaded coordination of pilot seal bulge loop 23 in guided seat 6, plays the role of guiding and positioning；Also, in sealing surface 20
In the case where damaging, not can guarantee sealing tightness, which can also play multi-stage sealed effect.Then, pass through
Minimum flow regulating valve flows back into water in oxygen-eliminating device, and the entrance feedwater flow for increasing feed pump is recycled by feed pump, protects
Demonstrate,prove feed pump safe operation.Driving drive leader 17 and multi-stage vortex line style valve rod 7 in driving device, fast reciprocating acts together
During, using the sliding of 17 end leader nut 15 of drive leader, to reduce vibration；And it is driven by the buffering of butterfly spring 14
The impact force of dynamic guide rod 17.
Claims (6)
1. a kind of minimum flow regulating valve, including valve body (1) and valve deck (2), it is characterised in that: setting inside the valve body (1)
Have valve chamber (3), the valve inlet (4) being arranged on the side and valve body (1) of valve chamber (3) is connected；It is provided in the valve chamber (3) perpendicular
The inlet of the multi-stage vortex guided seat (6) directly arranged, multi-stage vortex guided seat (6) upper end is communicated with valve chamber (3), multistage
The liquid outlet of turbine guide valve seat (6) lower end is then connected with the valve outlet (5) being arranged on valve body (1)；Also, multi-stage vortex is led
Multi-stage vortex line style valve rod (7), the upper end of multi-stage vortex line style valve rod (7) are movably set with into the central cavity of valve seat (6)
It is provided with drive leader (17), the upper end that drive leader (17) passes through valve deck (2) is connected with driving device；Drive leader (17) with
It is provided with sealing cover (11) between on the upside of valve deck (2), is provided with guide ring (9) between drive leader (17) and valve deck (2) downside.
2. minimum flow regulating valve according to claim 1, it is characterised in that: the multi-stage vortex guided seat (6) by
Valve seat body (18) is constituted, and is provided with the multi-stage vortex chamber (19) arranged vertically in the middle part of valve seat body (18)；Multi-stage vortex guiding
It is provided with diversion trench (21) at the inlet of valve seat (6) upper end, the lower end of diversion trench (21) is provided with sealing surface (20).
3. minimum flow regulating valve according to claim 2, it is characterised in that: the multi-stage vortex guided seat (6)
The top of valve seat body (18) outer wall is provided with the outboard diversion face (22) of inclination arrangement.
4. minimum flow regulating valve according to claim 2, it is characterised in that: the multi-stage vortex line style valve rod (7) by
Stem body (24) is constituted, and is provided with the location sealing flange (25) that several groups are arranged in a vertical direction on stem body (24),
Correspondingly, in the multi-stage vortex chamber (19) of the multi-stage vortex guided seat (6), with it is each on multi-stage vortex line style valve rod (7)
The corresponding position of location sealing flange (25), is respectively arranged with pilot seal bulge loop (23)；And stem body (24) top, with
The position that multi-stage vortex guided seat (6) diversion trench (21) is in contact is provided with sealing surface (20), the upper end of stem body (24)
It is connected with the lower end of drive leader (17).
5. minimum flow regulating valve according to claim 1, it is characterised in that: the multi-stage vortex guided seat (6)
In valve chamber (3) space outside top, multi-stage vortex line style valve rod (7) upper end, it is provided with multi-level flow equalization cover (8)；Multi-level flow equalization
Cover (8) is made of inside cover (27), and stream chamber (31) is provided in the middle part of inside cover (27), inside cover (27) top
The equal tap hole (30) of decompression is provided on side wall；The outer cover of the inside cover (27) is equipped with outside cover (26), outside mask
The equal inflow hole (29) of decompression, and the equal inflow hole (29) of the decompression and the equal tap hole of decompression are provided on the side wall of body (26) lower part
(30), it is connected by the labyrinth flow-path (28) being arranged between outside cover (26) inner wall and inside cover (27) outer wall.
6. minimum flow regulating valve according to claim 1, it is characterised in that: the drive leader (17) passes through valve deck
(2) upper end is provided with damping device (13), and damping device (13) is connected with the bracket (12) being arranged above valve deck (2)；Damping
Device (13) includes leader nut (15) of the setting in drive leader (17) upper end, and leader nut (15) is slidably arranged in bracket
(12) inside, and the top of leader nut (15) is connected by butterfly spring (14) with the top of bracket (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822195872.4U CN209340594U (en) | 2018-12-26 | 2018-12-26 | Minimum flow regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822195872.4U CN209340594U (en) | 2018-12-26 | 2018-12-26 | Minimum flow regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209340594U true CN209340594U (en) | 2019-09-03 |
Family
ID=67759138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822195872.4U Active CN209340594U (en) | 2018-12-26 | 2018-12-26 | Minimum flow regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209340594U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510046A (en) * | 2021-05-11 | 2021-10-19 | 宋鹏 | Chip dispensing connector |
-
2018
- 2018-12-26 CN CN201822195872.4U patent/CN209340594U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510046A (en) * | 2021-05-11 | 2021-10-19 | 宋鹏 | Chip dispensing connector |
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