CN203948776U - A kind of valve with cavitation-preventive cover - Google Patents
A kind of valve with cavitation-preventive cover Download PDFInfo
- Publication number
- CN203948776U CN203948776U CN201420360295.9U CN201420360295U CN203948776U CN 203948776 U CN203948776 U CN 203948776U CN 201420360295 U CN201420360295 U CN 201420360295U CN 203948776 U CN203948776 U CN 203948776U
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- China
- Prior art keywords
- cavitation
- preventive cover
- valve
- piston
- chamber
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- Expired - Fee Related
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- 239000007788 liquid Substances 0.000 claims description 44
- 230000037361 pathway Effects 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000003628 erosive effect Effects 0.000 abstract description 9
- 239000012530 fluid Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Details Of Valves (AREA)
Abstract
The utility model discloses a kind of valve with cavitation-preventive cover, comprise valve body, piston; On described valve body, be formed with fluid-through chamber, this fluid-through chamber comprises communicated cavity; Described piston is movably arranged in valve body, and can between the closed position of shutoff communicated cavity upper end open and the enable possition away from communicated cavity, move; This valve also comprises the control system for driven plunger motion; Cavitation-preventive cover is also installed on the lower end of described piston.The utility model is by being provided with cavitation-preventive cover on piston, can reduce, occur in even can switching power chamber the phenomenon of cavitation erosion; In the time that valve is worked under small flow state, even if now there is cavitation phenomenon, it also only occurs over just cavitation-preventive cover inside, thereby has protected the inwall of communicated cavity, and the operating life that has extended valve body meanwhile, also can reduce noise; And, by the structure of valve body is rationally set, can make the keying of piston more flexible, reduce on valve body the wearing and tearing with piston component.
Description
Technical field
The utility model relates to a kind of valve with cavitation-preventive cover.
Background technique
Valve is widely used in the pipe network systems such as cities and towns feeding discharge opeing, building feeding discharge opeing, industrial feeding discharge opeing, water conservancy and agricultural irrigation feeding discharge opeing, fire-fighting feeding discharge opeing, Heating,Ventilating and Air Conditioning (HVAC).Described valve comprises valve body, is positioned at the piston of valve body, on described valve body, is formed with fluid-through chamber, and this fluid-through chamber comprises communicated cavity, with by utilizing the shutoff of piston to communicated cavity, opening, thereby realizes conducting, the blocking-up of fluid-through chamber.And in the time that piston is opened, the communicated cavity of flowing through of the flowing medium in valve body, easily produces cavitation erosion in described communicated cavity.And the generation of cavitation erosion can damage the internal surface of communicated cavity, thereby affect working life of valve body.
Model utility content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of valve with cavitation-preventive cover, and the phenomenon of cavitation erosion occurs its internal surface that can reduce communicated cavity.
For addressing the above problem, the technological scheme that the utility model adopts is as follows:
With a valve for cavitation-preventive cover, comprise valve body, piston; On described valve body, be formed with fluid-through chamber, one end of described fluid-through chamber has liquid outlet, and the other end has liquid entering hole; This fluid-through chamber comprises communicated cavity; Described piston is movably arranged in valve body, and can between the closed position of shutoff communicated cavity upper end open and the enable possition away from communicated cavity, move; This valve also comprises the control system for driven plunger motion; Cavitation-preventive cover is also installed on the lower end of described piston; The activity of described cavitation-preventive cover interts in communicated cavity, and can under the drive of piston, move by the axial direction along communicated cavity; Described cavitation-preventive cover is hollow shape, and has under shed; The outer surface of the sidewall of described cavitation-preventive cover and the internal surface of communicated cavity are fitted, and on the sidewall of described cavitation-preventive cover, are placed with the liquid bath of crossing of multiple inclinations; The central axes of the central shaft of the liquid entering hole of described fluid-through chamber and the liquid outlet of fluid-through chamber or overlap, the central shaft of the liquid outlet of fluid-through chamber is vertical with the axial direction of communicated cavity.
Described fluid-through chamber also comprises feed pathway and liquid outlet channel, and described communicated cavity is between feed pathway and liquid outlet channel.
Described feed pathway comprise be suitable for for piston lower end intert upper cavity; Described liquid outlet channel comprises lower cavity; Described upper cavity is positioned at the top of communicated cavity, and lower cavity is positioned at the below of communicated cavity.
Valve seat is installed in valve body, and described communicated cavity is arranged on this valve seat.
On the sidewall of described cavitation-preventive cover, show multiple liquid baths of crossing around the central shaft circumferential row of cavitation-preventive cover.
The described angle of crossing the length direction of liquid bath and the axial direction of cavitation-preventive cover is 10-20 degree.
In the time that piston is positioned at enable possition, described fluid-through chamber is on state; In the time that piston is positioned at closed position, described fluid-through chamber is in blocking state.
The bottom of described piston is formed as for opening and closing with communicated cavity top edge the flap portion coordinating, and described cavitation-preventive cover is positioned at the below of flap portion.
Compared to existing technology, the beneficial effects of the utility model are:
The utility model is by being provided with cavitation-preventive cover on piston, can reduce, occur in even can switching power chamber the phenomenon of cavitation erosion; In the time that valve is worked under small flow state, even if now there is cavitation phenomenon, it also only occurs over just cavitation-preventive cover inside, thereby has protected the inwall of communicated cavity, and the operating life that has extended valve body meanwhile, also can reduce noise; And, by the structure of valve body is rationally set, can make the keying of piston more flexible, reduce on valve body the wearing and tearing with piston component.
Brief description of the drawings
Fig. 1 is the structural representation of valve of the present utility model;
Fig. 2 is the structural representation of the cavitation-preventive cover in the utility model;
Wherein, 1, valve body; 2, cavitation-preventive cover; 3, valve seat; 4, flap portion seal ring; 5, piston; 6, the second ball valve; 7, side sealing circle; 8, piston cylinder; 9, pilot valve; 10, spring; 11, needle-valve; 12, safety check; 13, filter; 14, the first ball valve; 15, feed pathway; 16, liquid outlet channel; 21, roof; 22, sidewall; 23, cross liquid bath.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further, understands the utility model technical thought required for protection so that clearer.
As shown in Figure 1, 2, for a kind of valve with cavitation-preventive cover of the present utility model, comprise valve body 1, piston 5; On described valve body 1, be formed with fluid-through chamber, one end of described fluid-through chamber has liquid outlet, and the other end has liquid entering hole; This fluid-through chamber comprises communicated cavity; Described piston 5 is movably arranged in valve body 1, and can between the closed position of shutoff communicated cavity upper end open and the enable possition away from communicated cavity, move; This valve also comprises the control system of moving for driven plunger 5; Cavitation-preventive cover 2 is also installed on the lower end of described piston 5; Described cavitation-preventive cover 2 activities intert in communicated cavity, and can under the drive of piston 5, move by the axial direction along communicated cavity; Described cavitation-preventive cover 2 is hollow shape, and has under shed; The outer surface of sidewall 22 of described cavitation-preventive cover 2 and the internal surface of communicated cavity are fitted, and on the sidewall 22 of described cavitation-preventive cover 2, are placed with the liquid bath 23 excessively of multiple inclinations.
Wherein, described closed position is piston 5 and is moved downward to the position of top edge by pasting communicated cavity, and described enable possition is piston 5 and is moved upward to the position of the top edge that leaves communicated cavity.Piston 5 can move between the closed position of shutoff communicated cavity upper end open and the enable possition away from communicated cavity, namely, utilizes piston 5 to coordinate for the switching of communicated cavity, so that described fluid-through chamber is in conducting, blocking state.,, in the time that piston 5 is positioned at enable possition, described fluid-through chamber is on state; In the time that piston 5 is positioned at closed position, described fluid-through chamber is in blocking state.
And in the working procedure of valve, when piston 5 is during in enable possition, high-velocity fluid medium in fluid-through chamber enters the also centre of directive cavitation-preventive cover 2 from the liquid bath 23 of crossing of cavitation-preventive cover 2, and be skewed owing to crossing liquid bath 23, flowing medium and bubble jet flow enter the interior rear mutual shock of cavitation-preventive cover 2, form turbulent flow, produce the conversion consumption of kinetic energy, increase the flow resistance of flowing medium, the pressure that reduces flowing medium recovers, the gradient that the pressure of slowing down fluid medium changes, impel the flow velocity of flowing medium steady, can reduce, in even can switching power chamber, there is the phenomenon of cavitation erosion.If it is constant to work as liquid entering hole pressure; piston 5 unlatching amplitudes hour; namely; when valve is worked under small flow state; even if now there is cavitation phenomenon, it also only occurs over just cavitation-preventive cover 2 inside, thereby has protected the inwall of communicated cavity; the operating life that has extended valve body 1, produces noise pollution also can reduce valve working time.
The central axes of the central shaft of the liquid entering hole of described fluid-through chamber and the liquid outlet of fluid-through chamber or overlap, the central shaft of the liquid outlet of fluid-through chamber is vertical with the axial direction of communicated cavity.And due to the moving direction of piston 5 and the axial direction of communicated cavity consistent, and by adopting said structure, in use, when valve body 1 is placed on horizontal interface, because the moving direction of piston 5 is consistent with gravitational direction, thereby, can avoid producing inhomogeneous contact friction under the component effect due to the gravity of piston 5, eliminate the surface friction drag producing because of Action of Gravity Field, made the keying of piston 5 more flexible, reduced on valve body 1 wearing and tearing with piston 5 components.
Described fluid-through chamber also comprises feed pathway 15 and liquid outlet channel 16, and described communicated cavity is between feed pathway 15 and liquid outlet channel 16.Described feed pathway 15 comprise be suitable for for piston 5 lower ends intert upper cavity; Described liquid outlet channel 16 comprises lower cavity; Described upper cavity is positioned at the top of communicated cavity, and lower cavity is positioned at the below of communicated cavity.And according to common practise, liquid entering hole is positioned on the outboard end of feed pathway 15, liquid outlet is positioned on the outboard end of liquid outlet channel 16.By adopting said structure, when piston 5 is during in enable possition, flowing medium from be positioned at top cavity through communicated cavity flow to be positioned at below lower cavity, thereby can avoid piston 5 out-of-date in pressure recovery increase place generation cavitation erosion in flowing medium high speed flow with the top edge of communicated cavity, prevent that piston 5 and the sealing pair of the top edge of communicated cavity are subject to cavitation erosion.
Wherein, described fluid-through chamber can be directly one-body molded on valve body 1.And preferred, valve seat 3 is installed in valve body 1, described communicated cavity is arranged on this valve seat 3, and namely, described fluid-through chamber adopts the mode being connected to form.And by adopting the design of valve seat 3, be more convenient for processing and fabricating, and, be also convenient to piston 5 and open and close and coordinate with valve seat 3.
Preferably, the bottom of described piston 5 is formed as, for opening and closing with valve seat 3 (namely communicated cavity top edge) the flap portion coordinating, that is to say, this piston 5 mainly utilizes flap portion to coordinate with the switching of valve seat 3, to realize shutoff and the unlatching of communicated cavity.And by adopting said structure, can reduce the impact that piston 5 and flap portion are subject to the upstream medium active force in valve body 1, make the keying campaign of piston 5 more steady, navigability is stronger, control accuracy is higher, avoided flap portion upper end to form large cavity simultaneously, make the design of valve body 1 inside more reasonable, reduce vortex and the turbulent flow of flowing medium on flap portion top, thereby reduce the flow resistance of flowing medium in flap portion upstream, make media flow more steady, further reduced medium and in the time of stream process valve seat 3, produced cavitation erosion.Concrete, described piston 5 is rotational-like, and described cavitation-preventive cover 2 is positioned at the below of flap portion.Preferably, described flap portion is embedded with flap portion seal ring 4, the sealing while closing to improve piston 5 in the position of fitting with valve seat 3.
Concrete, described cavitation-preventive cover 2 also comprises the roof 21 being fixedly connected with piston 5, and described sidewall 22 is arranged on the edge of roof 21 and to downward-extension.Wherein, the sidewall 22 of described cavitation-preventive cover 2 in the form of a ring, and on described sidewall 22 around the central shaft circumferential row of cavitation-preventive cover 2 show multiple cross liquid baths 23.Wherein, the described angle of crossing the length direction of liquid bath 23 and the axial direction of cavitation-preventive cover 2 is 10-20 degree, and especially 15 when spend, its noise reduction and damping effect the best.
Preferably, valve seat 3, cavitation-preventive cover 2 all adopt that tensile strength is high, the stainless steel material of cavitation is made, and are reserved with enough cavitation-preventive metal allowances, the operating life that can extend valve seat 3 and cavitation-preventive cover 2.
Wherein, described control system can adopt existing structure, as long as can driven plunger 5 move between closed position and enable possition.
In the present embodiment, described set-up of control system is hydraulic pressure comprehensive control system, wherein, on described valve body 1, is fixed with piston cylinder 8, and the upper end of described piston 5 coordinates with piston cylinder 8 motive sealings, and coordinates formation activity cavity between piston 5 and piston cylinder 8.Intert in fluid-through chamber the lower end of described piston 5.Described hydraulic pressure comprehensive control system comprises the spring 10 being arranged between piston 5 and piston cylinder 8, and this spring 10 is used to piston 5 that the restoring force moving towards closed position direction is provided.Described hydraulic pressure comprehensive control system also comprises the fluid control pipeline between feed liquor control pipeline, the liquid outlet that is connected to described movable cavity and the liquid outlet channel 16 between liquid entering hole and the feed pathway 15 that is connected to described movable cavity.Preferably, described feed liquor control pipeline is the input duct that the first valve member is installed, and described the first valve member comprises the first ball valve 14, safety check 12, the needle-valve 11 that are arranged in input duct.Filter 13 is also installed in described input duct.This fluid control pipeline is the fluid pipeline that second valve door assembly is installed, and described second valve door assembly comprises the pilot valve 9, the second ball valve 6 that are arranged on fluid pipeline.And by adopting said structure, can utilize spring 10 active forces and hydraulic action driven plunger 5 to move.
Certainly, except said structure, described control system also can be set to electromagnetic control system, in order to moving by electromagnetic force driven plunger 5.And described control system is not limited to hydraulic pressure comprehensive control system, electromagnetic control system, can also adopt other existing structure.
Above-mentioned mode of execution is only preferred implementation of the present utility model; the scope that can not limit with this utility model protection, the variation of any unsubstantiality that those skilled in the art does on basis of the present utility model and replacement all belong to the utility model scope required for protection.
Claims (8)
1. with a valve for cavitation-preventive cover, comprise valve body, piston; On described valve body, be formed with fluid-through chamber, one end of described fluid-through chamber has liquid outlet, and the other end has liquid entering hole; This fluid-through chamber comprises communicated cavity; Described piston is movably arranged in valve body, and can between the closed position of shutoff communicated cavity upper end open and the enable possition away from communicated cavity, move; This valve also comprises the control system for driven plunger motion; It is characterized in that: cavitation-preventive cover is also installed on the lower end of described piston; The activity of described cavitation-preventive cover interts in communicated cavity, and can under the drive of piston, move by the axial direction along communicated cavity; Described cavitation-preventive cover is hollow shape, and has under shed; The outer surface of the sidewall of described cavitation-preventive cover and the internal surface of communicated cavity are fitted, and on the sidewall of described cavitation-preventive cover, are placed with the liquid bath of crossing of multiple inclinations; The central axes of the central shaft of the liquid entering hole of described fluid-through chamber and the liquid outlet of fluid-through chamber or overlap, the central shaft of the liquid outlet of fluid-through chamber is vertical with the axial direction of communicated cavity.
2. the valve with cavitation-preventive cover as claimed in claim 1, is characterized in that: described fluid-through chamber also comprises feed pathway and liquid outlet channel, described communicated cavity is between feed pathway and liquid outlet channel.
3. the valve with cavitation-preventive cover as claimed in claim 2, is characterized in that: described feed pathway comprise be suitable for for piston lower end intert upper cavity; Described liquid outlet channel comprises lower cavity; Described upper cavity is positioned at the top of communicated cavity, and lower cavity is positioned at the below of communicated cavity.
4. the valve with cavitation-preventive cover as claimed in claim 1, is characterized in that: valve seat is installed in valve body, and described communicated cavity is arranged on this valve seat.
5. the valve with cavitation-preventive cover as claimed in claim 1, is characterized in that: on the sidewall of described cavitation-preventive cover, show multiple liquid baths of crossing around the central shaft circumferential row of cavitation-preventive cover.
6. the valve with cavitation-preventive cover as claimed in claim 1, is characterized in that: the described angle of crossing the length direction of liquid bath and the axial direction of cavitation-preventive cover is 10-20 degree.
7. the valve with cavitation-preventive cover as claimed in claim 1, is characterized in that: in the time that piston is positioned at enable possition, described fluid-through chamber is on state; In the time that piston is positioned at closed position, described fluid-through chamber is in blocking state.
8. the valve with cavitation-preventive cover as claimed in claim 1, is characterized in that: the bottom of described piston is formed as for opening and closing with communicated cavity top edge the flap portion coordinating, and described cavitation-preventive cover is positioned at the below of flap portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420360295.9U CN203948776U (en) | 2014-06-30 | 2014-06-30 | A kind of valve with cavitation-preventive cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420360295.9U CN203948776U (en) | 2014-06-30 | 2014-06-30 | A kind of valve with cavitation-preventive cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203948776U true CN203948776U (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420360295.9U Expired - Fee Related CN203948776U (en) | 2014-06-30 | 2014-06-30 | A kind of valve with cavitation-preventive cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203948776U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075023A (en) * | 2014-06-30 | 2014-10-01 | 广东永泉阀门科技有限公司 | Valve with gas-etching-proof cover |
-
2014
- 2014-06-30 CN CN201420360295.9U patent/CN203948776U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075023A (en) * | 2014-06-30 | 2014-10-01 | 广东永泉阀门科技有限公司 | Valve with gas-etching-proof cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Biao Inventor after: Wu Baimin Inventor after: Chen Jianming Inventor after: Liang Jianlin Inventor after: Huo Dawen Inventor after: Huang Mingliang Inventor before: Li Biao |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LI BIAO TO: LI BIAO WU BAIMIN CHEN JIANMING LIANG JIANLIN HUO DAWEN HUANG MINGLIANG |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Valve with gas-etching-proof cover Effective date of registration: 20151113 Granted publication date: 20141119 Pledgee: Shunde Guangdong rural commercial bank Nanhai Branch of Limited by Share Ltd Pledgor: Guangdong Yongquan Valve Technology Co., Ltd. Registration number: 2015990001000 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171103 Granted publication date: 20141119 Pledgee: Shunde Guangdong rural commercial bank Nanhai Branch of Limited by Share Ltd Pledgor: Guangdong Yongquan Valve Technology Co., Ltd. Registration number: 2015990001000 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Valve with gas-etching-proof cover Effective date of registration: 20171108 Granted publication date: 20141119 Pledgee: Shunde Guangdong rural commercial bank Nanhai Branch of Limited by Share Ltd Pledgor: Guangdong Yongquan Valve Technology Co., Ltd. Registration number: 2017440000121 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181130 Granted publication date: 20141119 Pledgee: Shunde Guangdong rural commercial bank Nanhai Branch of Limited by Share Ltd Pledgor: Guangdong Yongquan Valve Technology Co., Ltd. Registration number: 2017440000121 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Valve with gas-etching-proof cover Effective date of registration: 20181203 Granted publication date: 20141119 Pledgee: Shunde Guangdong rural commercial bank Nanhai Branch of Limited by Share Ltd Pledgor: Guangdong Yongquan Valve Technology Co., Ltd. Registration number: 2018990001132 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200109 Granted publication date: 20141119 Pledgee: Shunde Guangdong rural commercial bank Nanhai Branch of Limited by Share Ltd Pledgor: Guangdong Yongquan Valve Technology Co., Ltd. Registration number: 2018990001132 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20200630 |