CN201475449U - Pressure stabilization constant flow check valve - Google Patents
Pressure stabilization constant flow check valve Download PDFInfo
- Publication number
- CN201475449U CN201475449U CN2009201546474U CN200920154647U CN201475449U CN 201475449 U CN201475449 U CN 201475449U CN 2009201546474 U CN2009201546474 U CN 2009201546474U CN 200920154647 U CN200920154647 U CN 200920154647U CN 201475449 U CN201475449 U CN 201475449U
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- valve
- pressure
- constant flow
- spool
- flow check
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Abstract
The utility model discloses a pressure stabilization constant flow check valve which mainly comprises a valve body, a valve seat, a valve core, a clapboard, a support frame and a spring, wherein two sides of the valve body are provided with a valve inlet and a valve outlet which are arranged on the same axis; the inner side of the valve inlet is provided with the valve seat; the valve core corresponds to the position of the valve seat and is fixed on one end of a valve rod; the other end of the valve rod is fixed with a regulator which corresponds to the position of the valve outlet and can slide in the valve outlet; the clapboard is fixed in the middle part of the valve body; the support frame is fixed on the clapboard and vertical to the valve inlet and the valve outlet; the lower end of the support frame is provided with a guide hole which is arranged on the same axis with the valve inlet and the valve outlet; the valve rod is movably sleeved in the guide hole of the support frame in a sliding way; and the spring is sleeved on the valve rod and limited between the valve core and the support frame.
Description
Technical field
The utility model belongs to valve technology field, relates to a kind of pressure-stabilizing constant flow that reduces hydrodynamic pressure fluctuation and have a fluid check function specifically from energy control valve.
Background technique
Pipe-line system pressure surge occurs through regular meeting; regulative mode commonly used at present is to adopt electronic, the pneumatic or modulating valve that surges; realize the stable of delivery pressure and flow; this valve control mode exists the valve volume big; the control system complexity, the price height, reliability is low; using scope is restricted, and particularly can not take into account modulating valve and safety check dual functions simultaneously.
System pressure changes fast, and the quick tracking of regulation valve core changes, and can cause the big ups and downs of system's upstream pressure, causes the control system instability, or produces the control water hammer, and this also is one of difficulty of Control System Design in the engineering.
Reciprocating pump is to utilize the plunger to-and-fro motion, sucks fluid and extrudes the conveying equipment for fluid substances of fluid from pump discharge.When the pump drain, the pressure of fluid raises, and gush out from delivery side of pump, but when pump sucked liquid, pump discharge pressure reduces, and formed the fluctuation of pressure.The pump discharge pressure fluctuation causes the pulse current, causes the system pipeline vibration and causes hydrodynamic noise.
For solving hydrodynamic pressure and flowed fluctuation problem, realize the purpose of water saving, considered on valve, to install additional auxiliary device on some patents and the product, WQS water economizer, KNT water economizer and its domestic prosperous board water economizer as Korea S, and patent announcement CN201159313Y constant-pressure constant-flow valve etc., its basic principle is all utilized the simple control of throttling groove (hole) realization flow in the spool pressurized slide adjusting valve, be subjected to the influence of throttle orifice, not only fluid resistance is big for this pressure-stabilizing constant flow valve, and owing to do not possess pooling feature, adjustment process stability is bad.
The model utility content
The purpose of this utility model is to provide a kind of pressure buffer function that has, the pressure-stabilizing constant flow control valve that adjustment process is more stable, and owing to have the safety check function, suitable being installed in as the outlet of kinetic pumps such as reciprocating pump outlet realized the double effects of safety check and stable pump pressure and flow output.
For achieving the above object, the pressure-stabilizing constant flow valve that the utility model provides, it mainly comprises:
One valve body, its both sides offer a valve import and a valve outlet port, and described valve import and valve outlet port are on same axis;
Be provided with a valve seat in the inboard of valve import;
One spool, the position of corresponding described valve seat;
This spool is fixed on an end of valve rod, and the other end of this valve rod is fixed a regulator, also can slide in valve outlet port in the position of the corresponding valve outlet port of this regulator;
One dividing plate is fixed in the valve body middle;
One supporting frame is fixed on this dividing plate, and perpendicular to valve import and valve outlet port, a pilot hole is offered in the lower end of this supporting frame, and this pilot hole and valve import and valve outlet port are on the same axis;
Described valve rod is set in the pilot hole of supporting frame slidably;
One spring is set on the valve rod, and is limited between spool and the supporting frame.
In the pressure-stabilizing constant flow check valve of the present utility model, spool is for being with sufficient cone or the flat sealing configuration of band foot, the corresponding valve seat of its foot, and regulator is with the garden barrel shaped structure of sufficient cone or wall perforate, leads and water conservancy diversion with convection cell.
In the pressure-stabilizing constant flow check valve of the present utility model, supporting frame is fixed on the dividing plate by nut, regulates the height of supporting frame by adjusting nut.
In the pressure-stabilizing constant flow check valve of the present utility model, valve body outside and the upper fixed that is positioned at dividing plate have a protective housing, and this protective housing is an inverted U-shaped basin-like body, and this protective housing is outside equipped with air cell covering, in this air cell covering air bag is installed; Offer the through hole that communicates with protective housing on the dividing plate and be convenient to fluid turnover air cell covering in the valve body; This protective housing compresses dividing plate, slows down the fluctuation of valve body internal pressure by the compressive strain of air bag, and reduces the back at pressure and discharge the fluid that is stored in the air cell covering
In the pressure-stabilizing constant flow check valve of benzene invention, valve body is flange with protective housing or is threaded.
In the pressure-stabilizing constant flow check valve of the present utility model, air bag is made by nonmetal flexible material, is perhaps made by metal bellows.
In the pressure-stabilizing constant flow check valve of the present utility model, air bag is equipped with and charges and discharge valve, and the air cell covering top has vent hole, is sealed by nut.
Pressure-stabilizing constant flow check valve of the present utility model, the regulating from the energy of hydrodynamic pressure when not only having realized pressure surge and flow, and the circulation area when having guaranteed the fluid proper flow have reduced the resistance of valve flow process; Simultaneously, the air bag device in the valve, pressure surge before the trimmer valve slows down the upstream pressure disturbance preferably; In addition, the water conservancy diversion regulatory function of regulator guarantees the stability that valve export flows.Pressure-stabilizing constant flow check valve of the present utility model, the valve mechanism compactness has realized multi-functional effectively integrating such as voltage stabilizing, constant current, non-return, water conservancy diversion, be a kind of and present safety check and throttling permanent-flow valve compare the more excellent product of function.
Description of drawings
Fig. 1 is a pressure-stabilizing constant flow check valve structural representation of the present utility model.
Fig. 2 is another embodiment's of the utility model a pressure-stabilizing constant flow check valve structural representation.
Embodiment
In the pressure-stabilizing constant flow check valve of the present utility model, spool is connected by valve rod with regulator, imports and exports shaft axis along valve body and installs, and an end of valve rod is installed and be fixed in to the relative valve seat of spool, and regulator is fixed in the other end of valve rod in the valve export side.
Valve rod slides in the pilot hole of supporting frame, and supporting frame is basic fixed with the dividing plate, and the setting height(from bottom) by nut fine setting supporting frame, the centering of realizing spool and regulator and valve seat and valve outlet port shaft axis.Comparatively ideal spool is to be with sufficient cone or to be with sufficient flat-bottom structure, and the foot of this spool is resisted against on the valve seat.
One spring is installed between spool and the supporting frame, and is sleeved on the valve rod; The rigidity of spring is selected for use according to flow and pressure control needs.
Regulator is to have the band foot cone structure of current stabilization leading role or the garden barrel shaped structure of wall perforate, and the foot of regulator or drum-shaped structure slide at the valve outlet port inwall, and play guiding and guide functions, reduce the turbulent disturbance of fluid output.
The perforate of valve body side is connected with the cylindricality air cell covering, and air bag is installed in the air cell covering, separate by dividing plate between air cell covering and the valve body, compress the dilatancy of the protective housing restriction air bag of dividing plate, on dividing plate and the protective housing through hole is arranged, allow the valve inner fluid by flowing between through hole is in air cell covering and valve body;
Air bag in the air cell covering can be rubber product or metal bellows or other flexible material manufacturing, and an end of air bag is provided with air-filled pore and gas charging valve, when being convenient to the valve maintenance, replenishes air bag internal air pressure deficiency.
After adopting this structure and mounting type, when backpressure occurring and flow, spool is subjected to the backpressure effect to compress valve seat, and throttle down prevents fluid refluence phenomenon, and the safety check water attack peak head pressure of closing generation is rapidly absorbed by air bag simultaneously; When the fluid forward is exported, the spool unlatching of lifting off a seat, and rest on holddown spring elastic force and fluid pressure difference equilibrium position; When valve inlet pressure raises suddenly, one side promotes spool and regulator moves to the direction that reduces the valve circulation area, reduce pressure reduction and increase the changes in flow rate that produces, on the other hand, high-pressure spray cognition enters the air cell covering compressing gasbag, reduces the increasing degree of upstream pressure, and when upstream pressure reduces, the fluid of dispensing deposit is realized the stable of flow and valve front and back pressure reduction gradually.
With reference to the accompanying drawings preferred embodiment of the present utility model is elaborated, this is to be engaged in the technician that technical field under the utility model has common knowledge and can to implement the utility model easily in order to make, and does not limit to technological thought of the present utility model and category thus.
When the fluid forward flow, spool is opened by the positive pressure effect, and pressure spring.When the positive acting equilibrium of forces that the reverse elastic force of spring and pressure difference produce, spool and regulator are relatively stable.When upstream pressure increased suddenly, rate of flow of fluid increased, and spool and regulator pressurized forward move, and regulator has reduced the fluid output flow area, and local resistance increases, and makes valve export pressure and flow relatively stable; Unnecessary pressure head before the valve, a part are then absorbed by the air bag distortion, reduce upstream pressure and impact; When upstream pressure reduced, air bag discharged the pressure and the fluid of its storage, slowed down the undulating value of pressure.
As depicted in figs. 1 and 2, import and export axial direction along valve body 1 and be separately installed with valve seat 2, spool 3, spring 4, supporting frame 5, valve rod 6, regulator 7.Be connected and fixed by valve rod 6 between spool 3 and the regulator 7, spool 3 is fixed in an end of valve rod 6 and valve seat 2 installations relatively; Spring 4 is installed between spool 3 and the supporting frame 5, and is sleeved on the valve rod 6; Valve rod 6 slides in the pilot hole of supporting frame 5, and regulator 7 is fixed in the other end of valve rod, can slide in valve outlet port.
Supporting frame 5 is fixing by dividing plate 8, by the setting height(from bottom) of nut 9 adjustable support framves 5.Be processed with through hole on the dividing plate 8, be convenient to valve body 1 inner fluid turnover air cell covering 11.
A hole is opened in valve body 1 side, with air cell covering 11 flanges or be threaded, air bag 12 is installed in the air cell covering 11, air bag 12 can be made by nonmetal flexible material or metal bellows, be equipped with on the air bag 12 and charge and discharge valve 13, air cell covering 11 top drillings are by nut 14 sealings.
When fluid by figure in direction shown in the arrow when flowing into, spool 3 is opened by the positive pressure effect, and pressure spring 4 produces oppositions, regulator 7 forwards move the circulation area of regulated fluid outlet.After spool 3 was opened into certain altitude, pressure difference, the opposite force of spring 4, the flow value and the local flow resistance value of regulator 7 regulating valves reached balance before and after the valve, and control system is relatively stable.When upstream pressure raises, because pressure difference increases, promote spool 3 and regulator 7 and continue forwards and move, reduce the flow area of valve inner fluid, rate of flow of fluid increases, and the local flow resistance of valve outlet port increases, and realizes stablizing of system's downstream pressure and flow value.
When fluid (opposite direction among the figure shown in the arrow) when flowing in the other direction, 3 of spools are subjected to compress valve seat 1 under the double reaction plus of hydrodynamic pressure and spring 4, realize the reverse non-return effect of fluid.Regardless of being forward or backpressure peak value, fluid all by the through holes turnover air cell covering 11 in dividing plate 8 and the protective housing 10, by the compressive strain of air bag 12, slows down the fluctuation of pressure, and reduces the back at pressure and discharge the fluid that is stored in the air cell covering 11.
Claims (9)
1. a pressure-stabilizing constant flow check valve is characterized in that, mainly comprises:
One valve body, its both sides offer a valve import and a valve outlet port, and described valve import and valve outlet port are on same axis;
Be provided with a valve seat in the inboard of valve import;
One spool, the position of corresponding described valve seat;
This spool is fixed on an end of valve rod, and the other end of this valve rod is fixed a regulator, also can slide in valve outlet port in the position of the corresponding valve outlet port of this regulator;
One dividing plate is fixed in the valve body middle;
One supporting frame is fixed on this dividing plate, and perpendicular to valve import and valve outlet port, a pilot hole is offered in the lower end of this supporting frame, and this pilot hole and valve import and valve outlet port are on the same axis;
Described valve rod is set in the pilot hole of supporting frame slidably;
One spring is set on the valve rod, and is limited between spool and the supporting frame.
2. pressure-stabilizing constant flow check valve as claimed in claim 1, wherein, spool and regulator are for being with sufficient cone sealing configuration, and the foot of the sufficient cone of spool and regulator is corresponding valve seat and valve outlet port respectively.
3. pressure-stabilizing constant flow check valve as claimed in claim 1, wherein, spool is the flat sealing configuration of band foot, regulator is the drum-shaped structure of wall perforate, the corresponding valve seat of the foot of spool, the corresponding valve outlet port of the drum-shaped structure of regulator.
4. pressure-stabilizing constant flow check valve as claimed in claim 1 is characterized in that supporting frame is fixed on the dividing plate by nut.
5. pressure-stabilizing constant flow check valve as claimed in claim 1 is characterized in that, valve body outside and the upper fixed that is positioned at dividing plate have a protective housing, and this protective housing is an inverted U-shaped basin-like body, and this protective housing is outside equipped with air cell covering, in this air cell covering air bag is installed; Offer the through hole that communicates with protective housing on the dividing plate and be convenient to fluid turnover air cell covering in the valve body; This protective housing compresses dividing plate.
6. pressure-stabilizing constant flow check valve as claimed in claim 5 is characterized in that, valve body is flange with protective housing or is threaded.
7. pressure-stabilizing constant flow check valve as claimed in claim 5 is characterized in that, air bag is nonmetal flexible material.
8. as claim 5 or 7 described pressure-stabilizing constant flow check valves, it is characterized in that air bag is a metal bellows.
9. pressure-stabilizing constant flow check valve as claimed in claim 4 is characterized in that, air bag is equipped with and charges and discharge valve, and the air cell covering top has vent hole, and this vent hole has sealing nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201546474U CN201475449U (en) | 2009-05-18 | 2009-05-18 | Pressure stabilization constant flow check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201546474U CN201475449U (en) | 2009-05-18 | 2009-05-18 | Pressure stabilization constant flow check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201475449U true CN201475449U (en) | 2010-05-19 |
Family
ID=42411698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201546474U Expired - Fee Related CN201475449U (en) | 2009-05-18 | 2009-05-18 | Pressure stabilization constant flow check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201475449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090568A (en) * | 2015-05-15 | 2015-11-25 | 浙江海洋学院 | Backflow preventer |
-
2009
- 2009-05-18 CN CN2009201546474U patent/CN201475449U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090568A (en) * | 2015-05-15 | 2015-11-25 | 浙江海洋学院 | Backflow preventer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20110518 |