CN101004221A - Floating ball self force type control valve - Google Patents
Floating ball self force type control valve Download PDFInfo
- Publication number
- CN101004221A CN101004221A CN 200610005666 CN200610005666A CN101004221A CN 101004221 A CN101004221 A CN 101004221A CN 200610005666 CN200610005666 CN 200610005666 CN 200610005666 A CN200610005666 A CN 200610005666A CN 101004221 A CN101004221 A CN 101004221A
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- ball float
- control valve
- control
- valve body
- throttling
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Abstract
The present invention discloses a ball float self-pressure type control valve. It is mainly composed of U-shaped valve body, isolation liquor, ball float, air-feeding joint, end cover, air-discharging joint, throttle component and regulation component. Said invention also provides the working principle of said control valve and its concrete operation method.
Description
Technical field
The present invention relates to a kind of industrial control valve, being specifically related to control and controlled device is gas, needs the self force type control valve of regulation and control gas flow.
Background technique
Pascal's law: the liquid in the seal container, can be to adding pressure thereon, change size ground in all directions are delivered to liquid everywhere with container wall on.
The control system of industrial processes has various dissimilar, for example simple control system, complex control system etc., and each control system all comprises controlled variable, manipulated variable and control corresponding rule.A simple control system is made up of Detecting element and transmitter, controller, final controlling element and controlled device.
Wherein, self force type control valve is called direct-acting control valve again, it is the control valve that a big class does not need additional energy source to drive, it is that a class is integrated measuring, control and carrying out function, utilize the energy of controlled device own to drive the control valve of its action, be divided into direct acting type and band pilot valve action type two big classes.The characteristics of direct acting type are simple in structure, easy to operate, but can cause pressure drop, cause the non-linear of outlet pressure, and usually, the precision of voltage regulation is at 10-20%.The self force type control valve of band pilot valve effect is applicable to the self-powering type control occasion of little pressure drop and big flow, and the outlet pressure excursion can be less than 10% of setting pressure.The similar pneumatic diaphragn actuating mechanism of self force type control valve actuator is made up of last membrane cover, following membrane cover, thin film membrane, push rod, spring, adjusting element, support and stroke display board etc.In order to improve the pilot valve of control accuracy, the nozzle flapper and the high-precision valve spring equilibrium principle of pneumatic instrument system depended in the raising of its control accuracy.
We find that in practice owing to adopt the control system of being made up of Detecting element and transmitter, controller, final controlling element and controlled device, structure is all comparatively complicated, also needs the high quality control power supply and the source of the gas of assisting.So all adopt redundant fashion in important events, more increased cost of investment.In addition, in the low differential pressure control of high-pressure system and the special dimension of inflammable and explosive occasion, the often not competent work of most components and parts and instrument.And adopt existing direct-operated regulator, there is the control accuracy problem.
Have the U-shaped meter instrument of measuring water column stage pressure difference in the prior art and utilize liquid level change to drive the example of floater controlled valve.
Summary of the invention
The invention provides a kind of floating ball self force type control valve, realize guaranteeing control accuracy, adapt to high pressure, simplified system, and the purpose of cost reduction.
In order to achieve the above object, the technical solution used in the present invention is that the pressure difference parameter of introducing control and controlled device at U-shaped valve body two ends respectively changes, pass through connecting pipe, the liquid level lifting that changes into the U-shaped insulating liquid changes, two ends ball float (throttling element) moves up and down with liquid level, the interlock throttling element with fixedly between the adjustment piece gap change the throttling cause gas output, regulate and control gas inlet and outlet pressure or flow.Because adopt pressure difference to change into difference of liquid level direct regulation and control, and do not have the valve stem seal kinetic damping of general structure, parameter response and control accuracy all are guaranteed; Insulating liquid itself can be used as the isolation water seal, and valve body and static sealing structure are born high pressure easily.Realized simplified control system, guaranteed the function of control accuracy, and can adapt to the low differential pressure control of high-pressure system, cost is low, the efficient height.
In the technique scheme, have a vertical U-shaped valve body of placing, charge into quantitative fluid partitioning, the ball float (or piston) of band throttling element is placed on two liquid level tops of U-shaped fluid column respectively, and have two gas accesses and gas outlet, control source and controlled source each other.If this moment, gas pressure difference equated, U-shaped two ends liquid level just is in same horizontal plane, and then the throttle valve opening at two ends equates, the volumetric flow of gas percentage of discharge equates, by the pressure of regulating flow process for stabilizing system.
If the present invention is installed at the process system delivery outlet, when because the variation of process system causes the two-phase gas pressure balancing puts when destroyed, at this moment, one end gas pressure raises relatively, the decline of fluid level, ball float (or piston) descends, because the connecting tube effect, the other end rises on the fluid level, and ball float (or piston) rises.At this moment, the throttling element of the end that descends descends thereupon, and it is big that the throttling bore becomes, and exhaust is accelerated, and the end throttling element that rises rises, and the throttling bore diminishes, and exhaust slows down; The variation of the gas pressure difference at this U-shaped valve body two ends causes the rising of the end fluid level that descends and the decline of the end fluid level of rising, and produces new throttling and regulates, and reaches new liquid level equilibrium.The unsteady regulating action of this liquid level continuously makes operation system pressure be in steady state.
If in the process system inlet opening the present invention's (throttling arrangement is oppositely installed) is installed, just can becomes a kind of protective arrangement for limiting output voltage.When cause that the two-phase gas pressure balancing puts when destroyed because process system changes, a side gas pressure raises relatively, the decline of fluid column, because the connecting tube effect, the opposite side fluid column rises.At this moment, fluid column decline side ball float (or piston) orifice sleeve descends thereupon, the throttling bore diminishes, exhaust slows down, and fluid column uplifted side ball float (or piston) throttling pin rises thereupon, and it is big that the throttling bore becomes, exhaust is accelerated, cause the adjusting of flowing device through these those long fluid column effects that disappear, reach new fluid column balance again, thus the output of restriction superpressure.
When the gas property of two kinds of control sources and controlled source different, its mass flow coefficient also can there are differences, and can carry out the position adjustment to restriction by actual conditions, perhaps, need to be separately positioned on the area ratio of U-shaped two ends fluid column, to satisfy various controling environment by Pressure reducing ratio.
If differential pressure is controlled at the column level, insulating liquid uses ordinary water; If differential pressure is controlled at the millimeter of mercury level, insulating liquid uses mercury; If chemical reaction is had certain requirement, insulating liquid can use the liquid of stable chemical performance such as silicone oil.
Description of drawings
Accompanying drawing 1: the structural representation of float-ball type differential pressure regulation controller, wherein [1], valve body, [2], insulating liquid, [3], ball float, [4], air input joint, [5], end cap, [6], air outlet adapter, [7], throttling element, [8], adjustment piece
Accompanying drawing 2: the structural representation of float-ball type differential pressure regulation controller, wherein [1], valve body, [2], insulating liquid, [3], ball float, [4], air input joint, [5], end cap, [6], air outlet adapter, [7], throttling element, [8], adjustment piece
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment one: shown in Figure of abstract, and a kind of floating ball self force type control valve, it is mainly by valve body [1], insulating liquid [2], ball float (or piston) throttling pin [3], air input joint [4], air outlet adapter [5], end cap [6], orifice sleeve [7] is formed.Use two sections steel pipes and be welded with connecting tube, steel pipe jointing machining screw is used to install end cap [6], the insulating liquid 2 of packing in the valve body, insulating liquid top is respectively charged into ball float (or piston) throttling pin [3], and have with end cap [6] and to cooperate, end cap [6] machining screw is installed throttling adjustment cover [7], can carry out the throttle position adjustment simultaneously.
Embodiment two: shown in accompanying drawing 1, and a kind of floating ball self force type control valve, it is identical with embodiment's one control principle, just the anti-dress of throttling pin (cover).
Embodiment three: shown in accompanying drawing 2, and a kind of floating ball self force type control valve, it is opposite with embodiment's one, two control principles.
Claims (3)
1, a kind of floating ball self force type control valve, it is mainly by U-shaped valve body [1], insulating liquid [2], ball float [3], air input joint [4], end cap [5], air outlet adapter [6], throttling element [7], adjustment piece compositions such as [8], it is characterized in that: the pressure difference parameter of introducing control and controlled device at U-shaped valve body two ends respectively changes, by connecting pipe, the liquid level lifting that changes into the U-shaped insulating liquid changes, and two ends ball float (throttling element) moves up and down with liquid level, the interlock throttling element with fixedly between the adjustment piece gap change the throttling cause gas output, regulate and control gas inlet and outlet pressure or flow.
2, the described U-shaped valve body of claim 1 [1] is characterized in that: two cylindrical shells with liquid or gas intercommunication.
3, claims 1 described ball float [3] is characterized in that: having (partly) of buoyancy spherically, columniform does not have the ball float that cooperates or with cylindrical shell the floating piston that cooperates is arranged with cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610005666 CN101004221A (en) | 2006-01-16 | 2006-01-16 | Floating ball self force type control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610005666 CN101004221A (en) | 2006-01-16 | 2006-01-16 | Floating ball self force type control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101004221A true CN101004221A (en) | 2007-07-25 |
Family
ID=38703547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610005666 Pending CN101004221A (en) | 2006-01-16 | 2006-01-16 | Floating ball self force type control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101004221A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912767A (en) * | 2015-05-07 | 2015-09-16 | 中国石油化工股份有限公司 | Pneumatic liquid level liquid pump |
| CN112377645A (en) * | 2020-11-10 | 2021-02-19 | 德清三盛氟塑科技有限公司 | Beverage quantitative distribution valve |
| CN113227616A (en) * | 2018-12-28 | 2021-08-06 | 切斯特阀门股份有限公司 | Check valve and assembly for liquid storage container |
-
2006
- 2006-01-16 CN CN 200610005666 patent/CN101004221A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912767A (en) * | 2015-05-07 | 2015-09-16 | 中国石油化工股份有限公司 | Pneumatic liquid level liquid pump |
| CN113227616A (en) * | 2018-12-28 | 2021-08-06 | 切斯特阀门股份有限公司 | Check valve and assembly for liquid storage container |
| CN113227616B (en) * | 2018-12-28 | 2024-01-16 | 切斯特阀门股份有限公司 | Check valve and assembly for liquid storage container |
| CN112377645A (en) * | 2020-11-10 | 2021-02-19 | 德清三盛氟塑科技有限公司 | Beverage quantitative distribution valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |