CN2244657Y - Self-pressure stabilizing valve - Google Patents
Self-pressure stabilizing valve Download PDFInfo
- Publication number
- CN2244657Y CN2244657Y CN 95226133 CN95226133U CN2244657Y CN 2244657 Y CN2244657 Y CN 2244657Y CN 95226133 CN95226133 CN 95226133 CN 95226133 U CN95226133 U CN 95226133U CN 2244657 Y CN2244657 Y CN 2244657Y
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- CN
- China
- Prior art keywords
- valve
- pressure
- negative feedback
- feed
- pressure maintaining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Control Of Fluid Pressure (AREA)
Abstract
The utility model discloses a pressure stabilizing valve with a feed forward negative feedback system, which is mainly used for the transportation of liquid multiple branches. Compared with traditional valves with the negative feedback, feed forward components (5) (105) are arranged on the lower end of a valve rod, a pressure guiding bore (or tube) (2) is arranged at a valve body inlet, so a feed forward pressure chamber (3) is connected with a valve inlet, and a feed forward adjusting mechanism is formed. When the utility model works, feed forward adjustment and negative feedback adjustment function simultaneously. When inlet and outlet pressure changes, the pressure change is passed to a feed forward negative feedback piston, drives a valve core to move up and down, changes an area where fluid passes, and causes the outlet pressure to achieve a fixed value.
Description
The utility model relates to a kind of fluid pressure maintaining valve, especially mainly by valve body, spool, capping up and down, Regulation spring, and the pressure maintaining valve that negative feedback mechanism constitutes.
At present, in tap water and hot-water heating system, distribute by design discharge, utilize orifice plate or ball valve to regulate for making water, can not current stabilization, can be with change in pressure.Several pressure maintaining valves or current stabilizer have also appearred in recent years, a kind of as in Chinese utility model patent specification (notification number is 2171756), disclosing by end cap current limliting circle, valve body, differential pressure, the sliding rod type current stabilizer that retaining and spool are formed, China's utility model patent specification (notification number is 2071282) discloses a kind of by valve body, diaphragm, spring, the automatic balancing valve that self regulating valve and manual adjustment valve are formed, they the two be pressure reduction and regulate, it is reverse feedback, positive feedback acts on simultaneously, reverse feedback plays stabilization, and the effect of positive feedback oscillates, performance is undesirable, can not stable operation.And Chinese utility model patent specification (notification number 2190211) discloses a kind of diaphragm type pressure maintaining valve of being made up of valve body, spool, valve seat, valve pocket spring, adjusting screw, diaphragm, bellows, drive link, it utilizes reverse feedback to regulate, variation in pressure behind the valve is regulated obviously, but regulate relatively poor the variation of the pressure before the valve.
In the actual life, just have water anhydrous, night on high floor daytime, and the water yield is big nearby apart from pumping plant, the water yield is little or anhydrous at a distance apart from pumping plant, bring very big inconvenience to people's life, at present, methods such as employing pressurization, decompression, water pipe transformation both complexity expend a large amount of energy again.And existing several voltage stabilizing equilibrium valves set forth above can not effectively stably be worked, and also do not have application in water service.
The utility model purpose provides and a kind ofly not disturbed by inlet and outlet pressure fluctuation, realizes regulating automatically, makes the pressure maintaining valve that outlet pressure is constant.
In order to solve above-mentioned task, solution of the present utility model is: increase by one in the lower end of the valve rod of common pressure maintaining valve and come that by the valve inlet variation in pressure outlet pressure stablize the feed-forward regulation mechanism that controls and be attached thereto, there is a tracting pressuring hole (or pressure inlet tube) that the feedforward pressure chamber is linked to each other with the valve import between valve body and the flap, constitute feed-forward regulation mechanism, feedforward compensation and reverse feedback are regulated and are carried out simultaneously.Because this valve has increased feed-forward regulation mechanism, adopted feedforward feedback to regulate effect simultaneously, when inlet pressure increased, pressure imported the feedforward pressure chamber into by bullport, acts on feed-forward component, made on the spool and moved, and flow reduces, and makes outlet pressure be tending towards definite value; When inlet pressure increases moment, outlet pressure also increases thereupon, the stressed increase valve rod of reverse feedback parts moves on also, and flow is reduced, and makes outlet pressure be returned to definite value, otherwise, when inlet pressure reduced, feedforward pressure chamber pressure reduced, and feed-forward component is stressed to be reduced, spool moves down, flow increases, and makes outlet pressure be tending towards definite value, reduces the moment outlet pressure at inlet pressure and reduces, the reverse feedback parts are stressed to be reduced, spool moves down, and flow is increased, and outlet pressure is returned to definite value, the existing valve class of this valve is highly sensitive like this, and adaptability is strong.
As further improvement of the utility model, can also make this valve flap become lonely linear turning surface, because feed-forward regulation is directly proportional with square of flow velocity with pressure, sectional area is directly proportional with radius squared, and flow is the product of flow velocity and sectional area, if flap does not adopt lonely linear turning surface, then valve outlet port pressure and spool are moved into non-linear, and flap is made lonely linear turning surface, the ordinate of lonely line is directly proportional with the biquadratic of horizontal ordinate, that is: Y=KX
4The span 0.0004～0.05 of K so feed-forward regulation pressure and spool on the amount of moving become approximately linear and regulate, make this valve control accuracy height, in addition, it is effective that flap adopts piston (metal or nylon) when high pressure or fluid are acid and alkali substance, flap adopts flexible sheet when low pressure, promptly reduces cost and easily installation.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is first mode of execution sectional drawing of the utility model
Fig. 2 is another mode of execution sectional drawing of the utility model
Pressure maintaining valve shown in Figure 1, valve body 1 middle part is by a spool of being made up of flap 7 and valve rod 4, valve rod 4 tops are connected with reverse feedback piston 8, and spring 11 is positioned at the top of reverse feedback piston 8 and the adjusting nut 10 at its top joins, and adjusting nut 10 is fixed on the upper cover 9.The lower end of valve rod 4 is connected with a feedforward piston 5 that outlet pressure is stablized control by the valve inlet variation in pressure, and feedforward piston 5 and following capping 6 constitute the feedforward pressure chamber.A tracting pressuring hole (or pressure inlet tube) 2 is arranged between valve body import and the flap, feedforward pressure chamber 3 is linked to each other with the valve import constitute feed-forward regulation mechanism, feedforward piston 5 can slide up and down at valve body 1 middle part with reverse feedback piston 8, move up and down thereby drive spool, the area that the change fluid passes through comes stabilization of export pressure.
Of the present utility model stablizing is that moving up and down of flap finished, and the working surface of flap is the curved turning surface, and the mathematical model of its curve is Y=KX
4, K value span is 4/10000ths to 5 percent, is determined by the latus rectum of valve and the amount of movement of flap.
It is controlled plant that the utility model adopts import and outlet pressure, feedforward inlet pressure P
λImport on the feedforward piston 5 by tracting pressuring hole or pressure inlet tube 2, work as P
λUpwards promote piston 5 during increase, so also promoted valve rod 4 flaps 7 that are connected with piston 5; The gap of spool and valve body 1 dwindles, and has eliminated because P
λIncreased pressure and the flow that causes increases makes outlet pressure be tending towards definite value; Otherwise, work as P
λWhen reducing, valve always moves down, and spool and valve body 1 gap increase, and flow increases, and has eliminated because P
λThe flow that reduces and reduced makes P
0Outlet pressure is tending towards definite value.Reverse feedback: move when outlet pressure increases on the spool, flow reduces, and outlet pressure is fallen back to normally, and outlet pressure reduces, and spool moves down, and flow increases makes outlet pressure rise to definite value.
Shown in Figure 2 is the another kind of mode of execution of this model utility
Figure the utility model can be designed another kind of concrete form in view of the above, and its flap 107 is the straight line type turning surface, and feedforward reverse feedback controlling mechanism is elastic force diaphragm 108 shapes, and this form cost is low, and simple installation is applicable in the small-sized pressure maintaining valve such as low pressure adjusting.After the pipeline behind the valve outlet port immobilizes,, also can make current stabilizer under the specific operation and use because pressure is corresponding one by one with flow.
Two kinds of embodiments of the present utility model have been provided above; but the utility model is not limited to this dual mode; as long as in pressure maintaining valve, adopted feedforward one reverse feedback system stream,, all should drop within the protection domain of the present utility model no matter it does any other variation on shape, structure.
Claims (7)
1, a kind of self-powering type pressure maintaining valve, it is mainly by valve body 1, spool, upper cover (9) capping (6) down, Regulation spring (11), the negative feedback mechanism of controlling at the valve outlet port variation in pressure (8) (108) constitutes, this spool is made up of valve rod (4) and two flaps (7) (107), valve rod (4) top is connected with negative feedback mechanism (8) (108), Regulation spring (11) is positioned at the top of negative feedback mechanism, it is characterized in that: the lower end of this valve rod (4) links to each other with feed-forward regulation parts (5) (105) that outlet pressure stablized control by the valve inlet variation in pressure, a tracting pressuring hole or pressure inlet tube (2) are arranged between valve body import and the flap (7) (107), feedforward pressure chamber (3) is linked to each other with the valve import, constitute feed-forward regulation mechanism.
2, pressure maintaining valve according to claim 1 is characterized in that: this flap (7) is lonely linear turning surface with the corresponding surface of valve body.
3, pressure maintaining valve according to claim 2 is characterized in that: the biquadratic to the ordinate of this lonely linear its lonely line of turning surface and horizontal ordinate is proportional.
4, according to any one described pressure maintaining valve in the claim 1 to 3, it is characterized in that: the feed-forward component in this valve feed-forward mechanism is a piston (5).
5, according to any one described pressure maintaining valve in the claim 1 to 3, it is characterized in that: the feed-forward component in this valve feed-forward mechanism is flexible sheet (105).
6, according to any one described pressure maintaining valve in the claim 1 to 3, it is characterized in that: the reverse feedback parts in this valve negative feedback mechanism are a piston (8).
7, according to any one described pressure maintaining valve in the claim 1 to 3, it is characterized in that: the reverse feedback parts in this valve negative feedback mechanism are flexible sheet (108).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95226133 CN2244657Y (en) | 1995-11-17 | 1995-11-17 | Self-pressure stabilizing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95226133 CN2244657Y (en) | 1995-11-17 | 1995-11-17 | Self-pressure stabilizing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2244657Y true CN2244657Y (en) | 1997-01-08 |
Family
ID=33872354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95226133 Expired - Fee Related CN2244657Y (en) | 1995-11-17 | 1995-11-17 | Self-pressure stabilizing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2244657Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100491781C (en) * | 2007-08-17 | 2009-05-27 | 方建生 | Liquid-controlled type multi-purpose valve |
| CN103162336A (en) * | 2013-03-14 | 2013-06-19 | 江南大学 | Household shower room mist spray heating device |
| CN103216217A (en) * | 2013-04-23 | 2013-07-24 | 东北石油大学 | Float-type flow stabilizer |
| CN107559467A (en) * | 2017-08-01 | 2018-01-09 | 哈尔滨工程大学 | A kind of three screw pump fluid pulsation energy storage safety valve |
-
1995
- 1995-11-17 CN CN 95226133 patent/CN2244657Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100491781C (en) * | 2007-08-17 | 2009-05-27 | 方建生 | Liquid-controlled type multi-purpose valve |
| CN103162336A (en) * | 2013-03-14 | 2013-06-19 | 江南大学 | Household shower room mist spray heating device |
| CN103162336B (en) * | 2013-03-14 | 2015-08-26 | 江南大学 | A kind of household shower room mist spray heating installation |
| CN103216217A (en) * | 2013-04-23 | 2013-07-24 | 东北石油大学 | Float-type flow stabilizer |
| CN103216217B (en) * | 2013-04-23 | 2015-07-29 | 东北石油大学 | A kind of Float-type flow stabilizer |
| CN107559467A (en) * | 2017-08-01 | 2018-01-09 | 哈尔滨工程大学 | A kind of three screw pump fluid pulsation energy storage safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |