CN2779360Y - A liquid level sensor - Google Patents
A liquid level sensor Download PDFInfo
- Publication number
- CN2779360Y CN2779360Y CN 200520055513 CN200520055513U CN2779360Y CN 2779360 Y CN2779360 Y CN 2779360Y CN 200520055513 CN200520055513 CN 200520055513 CN 200520055513 U CN200520055513 U CN 200520055513U CN 2779360 Y CN2779360 Y CN 2779360Y
- Authority
- CN
- China
- Prior art keywords
- liquid level
- rod
- level sensor
- buoyancy aid
- float
- 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 - Lifetime
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Abstract
The utility model relates to a liquid level sensor, which comprises a rod body, wherein a magnetic reed switch is arranged in the rod body; a floating body is sheathed on the rod body; the upper end of the floating body is a sleeve pipe; the floating body is sheathed on the rod body by the sleeve pipe so that the floating body can move along the rod body upward and downward within limits; the sleeve pipe is fixedly provided with a magnetic body; the lower end of the floating body is a float which is used for contacting the liquid level and lifts and lowers with the liquid level. Because a magnet of the liquid level sensor of the utility model is separated from the float, the rod body is also separated from the float and the rod body does not float on the liquid level, the utility model can avoid that the float is attached on the rod body by pollution of the liquid so as to lead the liquid level sensor to not work, can consequently ensure normal work of the liquid level sensor and can be suitable for detecting draining height of equipment such as air conditioners, etc.
Description
Technical field
The utility model relates to sensor technical field, relates in particular to a kind of liquid level sensor that is used for the tracer liquid height and position.
Background technology
Need to adopt liquid level sensor to carry out the detection of draining height in the equipment such as existing air-conditioning, the employing magnetic reed switch that these liquid level sensors have is controlled, as shown in Figure 1, existing liquid level sensor generally comprises the nonmagnetic metal or the plastic cement rod 10 of a sealing, magnetic reed switch 20 is set in the body of rod 10, with hollow and the inner float 40 that is provided with annular permanent magnnet 30 is enclosed within on the body of rod 10, float 40 can be fluctuated within the specific limits along the body of rod 10 again.The body of rod 10 tops are fixed on the walls such as water tank, float 40 and magnet 30 are one, float 40 floats in the liquid, along with the height change of liquid level moves up and down, magnet 30 also moves simultaneously, utilize magnet 30 to go to attract the closure of magnetic reed switch 20, produce switch motion and detect liquid level, with the control liquid level.
Prior art because the liquid level dirt as reasons such as scale, incrustation scales, and makes float attached to motionless on the body of rod, causes being failure to actuate, thereby sensor is not worked through regular meeting because float directly is enclosed within on the body of rod and contacts with liquid level, influences the normal operation of equipment.
The utility model content
Technical problem to be solved in the utility model is: overcome the prior art liquid level sensor and make float motionless on attached to the body of rod owing to liquid level is dirty through regular meeting; the shortcoming that causes liquid level sensor to be failure to actuate; a kind of liquid level sensor is provided; make float can not guarantee the operate as normal of liquid level sensor attached on the body of rod.
The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be:
This liquid level sensor comprises a body of rod, is provided with magnetic reed switch in the body of rod, on the described body of rod, be arranged with a buoyancy aid, the buoyancy aid upper end is a sleeve pipe, and buoyancy aid on the described body of rod, can move up and down buoyancy aid by this casing pipe sleeve along the body of rod within the specific limits; Be installed with magnetic on the described sleeve pipe; The lower end of described buoyancy aid is a float, is used for contacting with liquid level, carries out lifting with liquid level.
Can be equipped with register pin in described body of rod lower end, on the described sleeve pipe cannelure is set, cooperate with cannelure by register pin and carry out spacingly, buoyancy aid is moved up and down in the scope that cannelure limited along the described body of rod; Perhaps also can on the described body of rod, step be set, contact with described box face by step that to carry out an end spacing, cooperate with cannelure by register pin that to carry out the other end spacing, limit the scope that buoyancy aid moves up and down along the body of rod.
Described magnetic can adopt ring-shaped magnet, is set in the fixed position of described outside of sleeve.
The beneficial effects of the utility model are: because the utility model liquid level sensor magnet separates with float, the body of rod also separates with float, the body of rod does not float on the liquid level, thereby can avoid dirt (scale, incrustation scale etc.) to make float attached to causing liquid level sensor to be failure to actuate on the body of rod, thereby guaranteed the operate as normal of liquid level sensor because of liquid.
Description of drawings
Fig. 1 is a prior art liquid level sensor principle of work synoptic diagram;
Fig. 2 is the utility model liquid level sensor principle of work synoptic diagram.
Embodiment
With embodiment the utility model is described in further detail with reference to the accompanying drawings below:
As shown in Figure 2, the utility model provides a kind of liquid level sensor, comprise a body of rod 50 (can adopt the nonmagnetic metal bar or the plastic cement rod of sealing), in the body of rod 50, be provided with magnetic reed switch 51, on the body of rod 50, be arranged with a buoyancy aid 60, buoyancy aid 60 upper ends are a sleeve pipe 61, and buoyancy aid 60 is enclosed within on the body of rod 50 by this sleeve pipe 61, and buoyancy aid 60 can be moved up and down within the specific limits along the body of rod 50; Be installed with magnetic on the sleeve pipe 61, can adopt ring-shaped magnet 611, be set in the fixed position in sleeve pipe 61 outsides.The lower end of buoyancy aid 60 is a float 62, is used for contacting with liquid level, carries out lifting with liquid level.
Be equipped with register pin 52 in the body of rod 50 lower ends, sleeve pipe 61 is provided with cannelure 612, cooperates with cannelure 612 by register pin 52 and carries out spacingly, and buoyancy aid 60 is moved up and down in the scope that cannelure 612 is limited along the body of rod 50; Perhaps also step 53 can be set on the body of rod 50, contact with sleeve pipe 61 end faces by step 53 that to carry out an end spacing, cooperate with cannelure 612 by register pin 52 that to carry out the other end spacing, limit the scope that buoyancy aid 60 moves up and down along the body of rod 50.
Like this, the body of rod 50 tops are fixed on the walls such as water tank, float 62 floats in the liquid, along with the height change of liquid level moves up and down, follow the rising or the decline of liquid level, magnetic is with the same moved further of buoyancy aid, cause the magnetic reed switch contact to open or close, detect liquid level with this.
Because the utility model magnet separates with float, the body of rod also separates with float, the body of rod does not float on the liquid level, thereby can avoid dirt (scale, incrustation scale etc.) because of liquid to make float attached to causing liquid level sensor to be failure to actuate on the body of rod, thereby has guaranteed the operate as normal of liquid level sensor.
Those skilled in the art do not break away from essence of the present utility model and spirit, can there be the various deformation scheme to realize the utility model, the above only is the preferable feasible embodiment of the utility model, be not so limit to interest field of the present utility model, the equivalent structure that all utilization the utility model instructionss and accompanying drawing content are done changes, and all is contained within the interest field of the present utility model.
Claims (3)
1, a kind of liquid level sensor comprises a body of rod, is provided with magnetic reed switch in the body of rod, it is characterized in that: on the described body of rod, be arranged with a buoyancy aid, the buoyancy aid upper end is a sleeve pipe, and buoyancy aid on the described body of rod, can move up and down buoyancy aid by this casing pipe sleeve along the body of rod within the specific limits; Be installed with magnetic on the described sleeve pipe; The lower end of described buoyancy aid is a float, is used for contacting with liquid level, carries out lifting with liquid level.
2, liquid level sensor according to claim 1, it is characterized in that: described body of rod lower end is equipped with register pin, described sleeve pipe is provided with cannelure, cooperates with cannelure by register pin and carries out spacingly, and buoyancy aid is moved up and down in the scope that cannelure limited along the described body of rod; Perhaps on the described body of rod, step is set, contacts with described box face by step that to carry out an end spacing, cooperate with cannelure by register pin that to carry out the other end spacing, limit the scope that buoyancy aid moves up and down along the body of rod.
3, liquid level sensor according to claim 1 and 2 is characterized in that: described magnetic is a ring-shaped magnet, is set in the fixed position of described outside of sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055513 CN2779360Y (en) | 2005-03-04 | 2005-03-04 | A liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055513 CN2779360Y (en) | 2005-03-04 | 2005-03-04 | A liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2779360Y true CN2779360Y (en) | 2006-05-10 |
Family
ID=36753448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520055513 Expired - Lifetime CN2779360Y (en) | 2005-03-04 | 2005-03-04 | A liquid level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2779360Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386017A (en) * | 2011-11-18 | 2012-03-21 | 上海合璧电子元件有限公司 | Electromagnetic type liquid level switch |
| CN102607672A (en) * | 2012-03-26 | 2012-07-25 | 哈姆林电子(苏州)有限公司 | Liquid level sensor |
| CN102620798A (en) * | 2012-03-26 | 2012-08-01 | 哈姆林电子(苏州)有限公司 | Water level sensor |
| CN101201361B (en) * | 2006-12-15 | 2012-09-05 | 深圳迈瑞生物医疗电子股份有限公司 | Gas-liquid insulation device for storing liquid |
| CN105283740A (en) * | 2013-06-12 | 2016-01-27 | 卡特彼勒公司 | Visual fluid level indicator |
-
2005
- 2005-03-04 CN CN 200520055513 patent/CN2779360Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201361B (en) * | 2006-12-15 | 2012-09-05 | 深圳迈瑞生物医疗电子股份有限公司 | Gas-liquid insulation device for storing liquid |
| CN102386017A (en) * | 2011-11-18 | 2012-03-21 | 上海合璧电子元件有限公司 | Electromagnetic type liquid level switch |
| CN102386017B (en) * | 2011-11-18 | 2013-12-11 | 上海合璧电子元件有限公司 | Electromagnetic type liquid level switch |
| CN102607672A (en) * | 2012-03-26 | 2012-07-25 | 哈姆林电子(苏州)有限公司 | Liquid level sensor |
| CN102620798A (en) * | 2012-03-26 | 2012-08-01 | 哈姆林电子(苏州)有限公司 | Water level sensor |
| CN105283740A (en) * | 2013-06-12 | 2016-01-27 | 卡特彼勒公司 | Visual fluid level indicator |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150304 Granted publication date: 20060510 |