CN203231787U - Sensor for liquid level control - Google Patents
Sensor for liquid level control Download PDFInfo
- Publication number
- CN203231787U CN203231787U CN 201320181059 CN201320181059U CN203231787U CN 203231787 U CN203231787 U CN 203231787U CN 201320181059 CN201320181059 CN 201320181059 CN 201320181059 U CN201320181059 U CN 201320181059U CN 203231787 U CN203231787 U CN 203231787U
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- sensor
- liquid level
- level control
- tongue tube
- magnetic conductor
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Abstract
The utility model provides a sensor for liquid level control. The sensor for liquid level control mainly comprises a shell, a reed pipe positioned in the shell, memory magnets arranged beside the reed pipe and a magnetizer positioned beside the memory magnets. The sensor for liquid level control has the advantages that magnetic field distribution around the reed pipe is changed by the aid of the added magnetizer, and further the problem of overhigh misoperation rate caused by the fact that magnetic field strength of the memory magnets is insufficient or overhigh is solved, so that misoperation rate of the sensor can be lowered.
Description
Technical field
The utility model relates to a kind of sensor, particularly a kind of non-immersion sensor for liquid level control.
Background technology
Nowadays, liquid level sensor is widely used in the pressure vessel, jar, case, groove, pond in fields such as oil, chemical industry, device fabrication, in order to control or the warning of liquid level.Early stage sensor main element is the tongue tube of simplified package, cooperatively interacts to realize that by external magnets and tongue tube sensor is to the control of liquid level.This sensor is the monostable sensor, and as arrive the reference mark when liquid level is controlled after, sensor can send alerting signal, but rises or descend when the liquid level continuation, and this sensor but can not continue to report to the police.Continue if think alerting signal, then need the subsequent conditioning circuit of this sensor is done corresponding processing, such as increasing chronotron, so will cause the subsequent conditioning circuit complexity, and increase equipment cost.A kind of follow-on sensor has appearred again in existing industry, and this follow-on sensor encapsulates tongue tube with memory magnet.This follow-on sensor has been realized two-way stable, can continuous alarm, and strict especially but it requires memory magnet, if memory magnet magnetic intensity is not enough or strong excessively, will cause described sensor error action (as false alarm) rate high especially.Experiment showed, the malfunction rate more than 10%, be not suitable for using in reliable control occasion.
To sum up, all there is deficiency in existing liquid level sensor, needs a kind of new sensor of design to overcome above-mentioned defective.
The utility model content
The purpose of this utility model provides a kind of sensor that is used for liquid level control that reduces the malfunction rate.
The technical solution of the utility model is achieved in that described liquid level sensor mainly comprises shell, is positioned at the tongue tube of described shell, is arranged at the other memory magnet of described tongue tube, and is positioned at the other magnetic conductor of described memory magnet.
As preferably, described magnetic conductor is silicon iron sheet, iron plate or nickel sheet.
As preferably, described magnetic conductor is fixed on the described memory magnet.
Said fixing can realize by the mode of bonding agent or binding.
As preferably, the memory magnet other at described tongue tube is two, and polarity is opposite.
As preferably, described tongue tube is the tongue tube of a pair of normal opened contact.
The utility model compared with prior art, there is following advantage: by increasing described magnetic conductor, make the Distribution of Magnetic Field around the described tongue tube change, and then overcome the extra high problem of malfunction rate not enough because of described memory magnet self magnetic intensity or that cause excessively by force, thereby can reach the beneficial effect of the malfunction rate that reduces described sensor.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
A kind of sensor of controlling non-immersion for liquid level as shown in Figure 1, there is the external magnets (not shown) that cooperates with it its outside, mainly comprise shell 1, be positioned at the tongue tube 2 of described shell 1, be arranged at the memory magnet 3 on described tongue tube 2 sides, and a magnetic conductor 4 that is positioned at described memory magnet 3 sides.
Described tongue tube 2 is the tongue tube of a pair of normal opened contact, and its lead-in wire a, b lead to outside the described shell 1.
In the present embodiment, described memory magnet 3 is two, and polarity is opposite.Its by adhesive on described tongue tube 2.Wherein, the intensity of described memory magnet 3 is less than the intensity less than the external magnets (not shown).
Described magnetic conductor 4 can be silicon iron sheet, iron plate or nickel sheet, especially with silicon iron sheet the best.Described magnetic conductor 4 is fixed on the described memory magnet 3, in the present embodiment, described magnetic conductor 4 by adhesive on described memory magnet 3, certainly, described magnetic conductor 4 and described memory magnet 3 fixed form between the two are not limited to the mode in this enforcement, can also be by other means, for example, by binding mode (as lashing wire) both are bundled to realize fixing.
This sensor is in the process of making, and described tongue tube 2 and described memory magnet 3 are determined good relative positions earlier, and is then fixing, then with described magnetic conductor 4 by adhesive on described memory magnet 3, after the wiring, go into the shell embedding at last.
Above-described embodiment in use, the outer external magnets (not shown) of described shell 1 is near this sensor, described tongue tube 2 switches to normal opened contact normally closed contact or normally closed contact is switched to normal opened contact, and produces control signal.After the external magnets (not shown) is left this sensor, the described control signal of described memory magnet 3 memories, because the existence of described magnetic conductor 4, Distribution of Magnetic Field around the described tongue tube 2 changes, high malfunction rate problem not enough because of described memory magnet 3 self magnetic intensity or that cause excessively by force can be overcome, thereby the high malfunction rate of described sensor can be reduced.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. one kind is used for the sensor that liquid level is controlled, it mainly comprises shell (1), be positioned at the tongue tube (2) of described shell (1), be arranged at the other memory magnet (3) of described tongue tube (2), it is characterized in that: further comprise being positioned at the other magnetic conductor (4) of described memory magnet (3).
2. a kind of sensor for liquid level control according to claim 1, it is characterized in that: described magnetic conductor (4) is silicon iron sheet, iron plate or nickel sheet.
3. a kind of sensor for liquid level control according to claim 1, it is characterized in that: described magnetic conductor (4) is fixed on the described memory magnet (3).
4. a kind of sensor for liquid level control according to claim 3 is characterized in that: described magnetic conductor (4) by adhesive on described memory magnet (3).
5. the sensor for liquid level control according to claim 3, it is characterized in that: described magnetic conductor (4) is realized fixing with the mode of described memory magnet (3) by binding.
6. a kind of sensor for liquid level control according to claim 1, it is characterized in that: the memory magnet (3) other at described tongue tube (2) is two, and polarity is opposite.
7. a kind of sensor for liquid level control according to claim 1, it is characterized in that: described tongue tube (2) is the tongue tube of a pair of normal opened contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320181059 CN203231787U (en) | 2013-04-11 | 2013-04-11 | Sensor for liquid level control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320181059 CN203231787U (en) | 2013-04-11 | 2013-04-11 | Sensor for liquid level control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203231787U true CN203231787U (en) | 2013-10-09 |
Family
ID=49287907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320181059 Expired - Fee Related CN203231787U (en) | 2013-04-11 | 2013-04-11 | Sensor for liquid level control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203231787U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767499A (en) * | 2019-10-30 | 2020-02-07 | 珠海格力智能装备有限公司 | Magnetic switch and liquid level measuring device |
| CN111964754A (en) * | 2020-08-25 | 2020-11-20 | 芜湖联诺电器有限公司 | Liquid level sensor for special-shaped oil tank |
-
2013
- 2013-04-11 CN CN 201320181059 patent/CN203231787U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767499A (en) * | 2019-10-30 | 2020-02-07 | 珠海格力智能装备有限公司 | Magnetic switch and liquid level measuring device |
| CN111964754A (en) * | 2020-08-25 | 2020-11-20 | 芜湖联诺电器有限公司 | Liquid level sensor for special-shaped oil tank |
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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: 20131009 Termination date: 20180411 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |