CN202058044U - Liquid level control device - Google Patents
Liquid level control device Download PDFInfo
- Publication number
- CN202058044U CN202058044U CN2011201333070U CN201120133307U CN202058044U CN 202058044 U CN202058044 U CN 202058044U CN 2011201333070 U CN2011201333070 U CN 2011201333070U CN 201120133307 U CN201120133307 U CN 201120133307U CN 202058044 U CN202058044 U CN 202058044U
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- comparer
- fixed pulley
- control device
- liquid level
- level control
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Abstract
The utility model relates to a liquid level control device and belongs to the liquid level measuring technical field. The liquid level control device comprises a detection mechanism, an electric controller and a motor used together with a liquid driver, which are all arranged in a liquid container, wherein, the detection mechanism comprises a buoy, a counter weight and a fixed pulley; the buoy and the counter weight are connected with each other through a rope attached to the fixed pulley and are hung on two sides of the fixed pulley; the electric controller comprises a multi-turn potentiometer in axial connection with the fixed pulley, a comparator, an adjustable potentiometer, a switching triode and a relay; the output ends of the potentiometers are respectively connected with the positive and negative input ends of the comparator; the output end of the comparator is connected with the input end of the switching triode, and the output end of the switching triode is connected with the coil circuit of the relay; and the contact of the relay accesses a power-in wire of the motor. The liquid level control device has the advantages of high liquid level control accuracy, simple mechanical detection mechanism and circuit structure, and stability and reliability in operation.
Description
Technical field
The utility model relates to a kind of fluid level control device, belongs to level gauging (G01F) technical field.
Background technology
Fluid level control device need generally to be applied to the place of control liquid level, for example: water plant, ground such as catch pit.This device starts pump operation and draws water normally when liquid level increases to certain setting height, and when liquid level dropped to low level, pump stopped, and went round and began again like this, guarantees the normal of control liquid level.
The unattended robotization control of the general implementation in existing liquid level control place, in case and fluid level control device is malfunctioning, when for example water level drops to a certain degree, this control device is not because the control contact discharges, can occur motor continuously operation cause pump to be inhaled sky and burn and burn out, if water level increases to a certain degree, and control device sends startup command and just causes water level continue to go up, and finally equipment is flooded.
Existing market fluid level control device commonly used has two kinds of forms: 1, ball float form, its principle is exactly by a cable and in the liquid of the fixing control of an end ball float, along with the variation of water level, the angle that ball float floats changes and makes the contact of control circuit realize break-make; This mode is controlled simply, is widely used, but is subjected to the influence of water level fluctuation the situation that switching is shaken can occur, and causes institute's opertaing device frequently to open, stop, and always drags a umbilical cable in water, and is very dangerous.2, the fluid level controller of instrumented, its principle is to use liquid level sensor, relies on the variation of liquid pressure and converses the variation of water level, control according to water level then, this kind device control precision height, but equipment has high input, and control is complicated.
The utility model content
The technical problems to be solved in the utility model is, propose a kind of suitable unattended robotization place simple in structure, use the fluid level control device reliable, that control accuracy is high.
The technical solution of the utility model is: a kind of fluid level control device, comprise the motor that is arranged at testing agency, electric controller and liquid driven machine adapted in the liquid container, described testing agency comprises buoy, balance bob and fixed pulley, and described buoy and balance bob are by being attached to rope on the fixed pulley and being connected to each other and be hung on the both sides of fixed pulley; Described electric controller comprises and the coaxial multiturn potentiometer that is connected of fixed pulley, comparer, adjustable potentiometer, switch triode and relay, the output terminal of described potentiometer connects the positive-negative input end of comparer respectively, the input end of the output termination switch triode of described comparer, described switch triode the wire loop of output relay termination, the electric power incoming line of described motor is inserted in the contact of described relay.
When fluid level control device of the present utility model used, when level change, buoy drove fixed pulley and rotates along with liquid level floats, and fixed pulley drives the axle of multiturn potentiometer and rotates, and the voltage that multiturn potentiometer is exported to comparer changes; Adjustable potentiometer is exported to the reference voltage that comparer one is set simultaneously.When liquid level rose to certain altitude, multiturn potentiometer was exported to the voltage of comparer greater than reference voltage, comparer output electronegative potential, and the contact adhesive of relay, motor start-up liquid driven machine (such as pump) extracts liquid; When liquid level dropped to certain altitude, multiturn potentiometer was exported to the voltage of comparer less than reference voltage, and comparer is exported high electronegative potential, and open the contact of relay, and motor closing liquid driving machine no longer extracts liquid.Control liquid level if desired and increase, as long as regulate the reference voltage of adjustable potentiometer output.
Fluid level control device of the present utility model is by being connected to export the voltage that accurate variation changes one of two potentiometers and the fixed pulley that moves up and down with buoy are coaxial, make another potentiometer output set reference voltage, and by comparer the output voltage of two potentiometers is compared and to produce high electronegative potential output, open and close by switch and relay control motor again, thereby realize that liquid level is controlled within the setting range.The beneficial effect that brings thus is: control level accuracy height, mechanical detection mechanism and circuit structure are simple, reliable and stable work.
The technical scheme of the utility model fluid level control device is improved: described comparer is an operational amplifier, also is connected to divider resistance between described adjustable potentiometer output terminal and the comparer negative input end, and the output terminal of described comparer also is connected to shunt resistance.
Description of drawings
Below in conjunction with accompanying drawing fluid level control device of the present utility model is described further.
Fig. 1 is the fluid level control device structural representation of the utility model embodiment.
Embodiment
Embodiment
The fluid level control device of present embodiment as shown in Figure 1, comprise the motor that is arranged at testing agency, electric controller and liquid driven machine adapted in the liquid container, testing agency comprises buoy 1, balance bob 2 and fixed pulley 3, and buoy 1 and balance bob 2 are by being attached to rope 4 on the fixed pulley and being connected to each other and be hung on the both sides of fixed pulley 3.Electric controller comprises and the fixed pulley 3 coaxial multiturn potentiometers that are connected 5, comparer 6, adjustable potentiometer 7, two-stage switch triode V1, V2 and relay J, the output terminal of potentiometer connects the positive-negative input end of comparer 6 respectively, in this enforcement, the output terminal of multiturn potentiometer 5 connects the negative input end of comparer 6, and the output terminal of adjustable potentiometer 7 connects the positive input terminal of comparer 6; The output termination two-stage switch triode V1 of comparer 6, the input end of V2, the wire loop of the output relay termination J of two-stage switch triode V1, V2, the electric power incoming line of motor M is inserted in the contact of relay.
Comparer 6 adopts operational amplifier.Between adjustable potentiometer 7 output terminals and comparer 6 negative input ends, also be connected to divider resistance R1, R2, also be connected to shunt resistance R3 at the output terminal of comparer 6.
The fluid level control device use of present embodiment is referring to the description of aforementioned utility model content, and what need replenish is: when liquid level rose to certain altitude, multiturn potentiometer 5 was exported to the voltage U 1 of comparer 6 greater than reference voltage Ur ', promptly
In the following formula,
K=R1/R2,
Ur is the setting output voltage of adjustable potentiometer 7, and Uz is the supply line voltage of electric controller, and Δ U is triggered to the voltage variety of electronegative potential between triggering from noble potential, also promptly from high liquid level to the liquid level drop the low liquid level.Since exist in the comparer 6 with the corresponding Δ U of liquid level drop voltage wide region, the zero boundary state that existing fluid level control device exists always (promptly along with the fluctuation of liquid level, open and the state of the start and stop that the motor that causes does not stop for a moment relay control contact closure for a moment) just can not appear.
The various embodiments described above that are not limited to of the present utility model, all employings are equal to replaces the technical scheme that forms, and all drops on the protection domain of the utility model requirement.
Claims (2)
1. fluid level control device, comprise the motor that is arranged at testing agency, electric controller and liquid driven machine adapted in the liquid container, described testing agency comprises buoy, balance bob and fixed pulley, and described buoy and balance bob are by being attached to rope on the fixed pulley and being connected to each other and be hung on the both sides of fixed pulley; It is characterized in that: described electric controller comprises and the coaxial multiturn potentiometer that is connected of fixed pulley, comparer, adjustable potentiometer, switch triode and relay, the output terminal of described potentiometer connects the positive-negative input end of comparer respectively, the input end of the output termination switch triode of described comparer, described switch triode the wire loop of output relay termination, the electric power incoming line of described motor is inserted in the contact of described relay.
2. according to the described fluid level control device of claim 1, it is characterized in that: described comparer is an operational amplifier, also is connected to divider resistance between described adjustable potentiometer output terminal and the comparer negative input end, and the output terminal of described comparer also is connected to shunt resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201333070U CN202058044U (en) | 2011-04-27 | 2011-04-27 | Liquid level control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201333070U CN202058044U (en) | 2011-04-27 | 2011-04-27 | Liquid level control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202058044U true CN202058044U (en) | 2011-11-30 |
Family
ID=45018014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201333070U Expired - Fee Related CN202058044U (en) | 2011-04-27 | 2011-04-27 | Liquid level control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202058044U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112401666A (en) * | 2019-08-20 | 2021-02-26 | 迅智自动化科技股份有限公司 | Beverage brewing equipment |
-
2011
- 2011-04-27 CN CN2011201333070U patent/CN202058044U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112401666A (en) * | 2019-08-20 | 2021-02-26 | 迅智自动化科技股份有限公司 | Beverage brewing equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20190427 |
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| CF01 | Termination of patent right due to non-payment of annual fee |