CN203405262U - Liquid level sensor - Google Patents
Liquid level sensor Download PDFInfo
- Publication number
- CN203405262U CN203405262U CN201320466774.4U CN201320466774U CN203405262U CN 203405262 U CN203405262 U CN 203405262U CN 201320466774 U CN201320466774 U CN 201320466774U CN 203405262 U CN203405262 U CN 203405262U
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- CN
- China
- Prior art keywords
- plug
- liquid level
- probe
- shell
- level sensor
- 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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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to a liquid level sensor. The liquid level sensor comprises a case with the two ends opened, a printed board assembly arranged inside the case, a plug and a capacitance probe, wherein the plug and the capacitance probe are connected to the two ends of the case respectively. The plug is formed by arranging an insertion needle on a base through an insulation installation board, and the base is fixed to the port of one end of the case. The capacitance probe is formed by wrapping a probe body with an insulating bush, a protection pipe is arranged outside the insulating bush, and one end of the protection pipe is welded to the port of the other end of the case. The insertion needle of the plug and the probe body of the capacitance probe are respectively and electrically connected with the printed board assembly. According to the liquid level sensor, the plug and the capacitance probe are installed on the case, the insertion needle and the probe body are welded in the printed board assembly inside the case, and therefore the plug, the probe body and the case are closely connected, the use stability and the effectiveness in the monitoring process of the liquid level are improved.
Description
Technical field
The utility model relates to a kind of sensor, specifically a kind of liquid level sensor.
Background technology
Liquid level sensor is a kind of for monitoring the sensor device of water class I liquid I height of liquid level.Conventional liquid level sensor mostly is split type, and this split type liquid level sensor is immersed in liquid, easily, because all parts connects the problem that does not closely produce monitoring error, causes the validity of liquid level monitoring poor.
Utility model content
The purpose of this utility model is just to provide a kind of liquid level sensor, to solve the poor problem of existing liquid level sensor validity.
The utility model is achieved in that a kind of liquid level sensor, includes:
The shell of a both ends open,
Be arranged on the printed board assembly of described enclosure, and
Be connected to plug and the capacitance probe at described shell two ends;
Described plug is by insulated mounting plate, to be provided with contact pin on pedestal, and described pedestal is fixed in one end port of described shell;
Described capacitance probe is to be coated with insulating sleeve in probe outside, in the outer setting of described insulating sleeve, has pillar, and one end of described pillar is welded on the other end port of described shell;
Described contact pin and the described probe in described capacitance probe in described plug are electrically connected to described printed board assembly respectively.
Described printed board assembly is arranged on installing plate, and described installing plate is fixed on described enclosure.
Between described shell and described plug, be provided with O-ring seal, between described shell and described capacitance probe, be provided with O-ring seal.
The utility model is by being arranged on plug and capacitance probe on shell, and contact pin and the probe printed board assembly in shell is welded, to realize, plug, probe and shell are closely connected to the validity while having strengthened stability in use of the utility model and liquid level monitoring.The utility model is by the pillar of stainless steel is welded on the shell of stainless steel, thereby prevents that sensor is by survey liquid corrosion.Between the sleeve pipe of shell and plug, capacitance probe, all adopt O-ring seal sealing, to reach the object of sensor water-proof, dustproof, anti-vibration, impact.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, printed board assembly, 2, installing plate, 3, probe, 4, contact pin, 5, pedestal, 6, insulated mounting plate, 7, shell, 8, insulating sleeve, 9, pillar, 10, O-ring seal, 11, cornice, 12, packing ring.
Embodiment
As shown in Figure 1, the utility model includes shell 7, printed board assembly 1, plug and capacitance probe.Shell 7 both ends opens, installing plate 2 is fixed on enclosure, and printed board assembly 1 is arranged in shell 7 by installing plate 2, can be at printed board assembly 1 and 7 embedding heat-conducting glues of shell, make printed board assembly 1 fix, insulate and energy distribute heat, to reach the object that makes liquid level sensor high-low temperature resistant.
Plug is comprised of pedestal 5, contact pin 4, installing plate 2, for the connection of circuit and the output of signal.Contact pin 4 is arranged on pedestal 5 by insulated mounting plate 6, and one end of contact pin 4 is electrically connected to printed board assembly 1, and pedestal 5 is plugged in the left port of shell 7, and by being arranged on the closing in riveting jail of the cornice 11 in left port, and be fixed on shell 7.Between plug and shell 7, being provided with O-ring seal 10 seals.
Capacitance probe by popping one's head in, insulating sleeve 8, pillar 9 form; Insulating sleeve 8 is coated on the outside of probe 3, medial extremity at insulating sleeve 8 is shaped with convex shoulder, the medial extremity of insulating sleeve 8 is stuck in the right-hand member port of shell 7, and by the closing in riveting jail of the cornice 11 to arranging in shell right output port, make insulating sleeve 8 and probe 3 be fixed on the right-hand member port of shell 7.The medial extremity of probe 3 is electrically connected to printed board assembly 1.In insulating sleeve 8 outer setting, have pillar 9, the left port of pillar 9 is welded in the right output port of shell 7.Probe 3 is made for metal copper rod, insulating sleeve 8 adopts nylon material, and to meet insulation and corrosion-resistant requirement, and pillar 9 adopts the stainless steel material making with hole, both guaranteed the rising of liquid and reduced the impact that is not subject to air pressure, having met again corrosion resistant requirement.Between shell 7 and insulating sleeve 8, be provided with O-ring seal 10 and seal, on O-ring seal 10 limits, be provided with packing ring 12, so design can guarantee that the electric capacitance change of capacitance probe and other aspect such as corrosion-resistant, environment resistant meet the requirements.
The utility model is to utilize the specific inductive capacity of the fluid to be measured feature different with the specific inductive capacity of air to detect.The variation of the electric capacity producing while immersing liquid medium by electrode, makes phase shift RC pure oscillator loop produce change in oscillation, output alternation sinusoidal signal, and through detection rectification, Amplitude Ratio, is exported control signal through amplifier, to reach the variation of controlling liquid level.When liquid level rises, the electric capacity of capacitance probe changes, and makes oscillation circuit produce change in oscillation, output signal, and report to the police by external device (ED).
Claims (3)
1. a liquid level sensor, is characterized in that, includes:
The shell of a both ends open,
Be arranged on the printed board assembly of described enclosure, and
Be connected to plug and the capacitance probe at described shell two ends;
Described plug is by insulated mounting plate, to be provided with contact pin on pedestal, and described pedestal is fixed in one end port of described shell;
Described capacitance probe is to be coated with insulating sleeve in probe outside, in the outer setting of described insulating sleeve, has pillar, and one end of described pillar is welded on the other end port of described shell;
Described contact pin and the described probe in described capacitance probe in described plug are electrically connected to described printed board assembly respectively.
2. liquid level sensor according to claim 1, is characterized in that, described printed board assembly is arranged on installing plate, and described installing plate is fixed on described enclosure.
3. liquid level sensor according to claim 1 and 2, is characterized in that, between described shell and described plug, is provided with O-ring seal, between described shell and described capacitance probe, is provided with O-ring seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320466774.4U CN203405262U (en) | 2013-08-02 | 2013-08-02 | Liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320466774.4U CN203405262U (en) | 2013-08-02 | 2013-08-02 | Liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203405262U true CN203405262U (en) | 2014-01-22 |
Family
ID=49941192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320466774.4U Expired - Lifetime CN203405262U (en) | 2013-08-02 | 2013-08-02 | Liquid level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203405262U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387259A (en) * | 2018-10-23 | 2019-02-26 | 中国船舶重工集团公司第七〇九研究所 | Water-level probe |
| CN109884354A (en) * | 2019-02-20 | 2019-06-14 | 中国科学院过程工程研究所 | A kind of contact pin type probe being conveniently replaceable needle section |
-
2013
- 2013-08-02 CN CN201320466774.4U patent/CN203405262U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387259A (en) * | 2018-10-23 | 2019-02-26 | 中国船舶重工集团公司第七〇九研究所 | Water-level probe |
| CN109884354A (en) * | 2019-02-20 | 2019-06-14 | 中国科学院过程工程研究所 | A kind of contact pin type probe being conveniently replaceable needle section |
| CN109884354B (en) * | 2019-02-20 | 2020-10-13 | 中国科学院过程工程研究所 | Contact pin type probe convenient for replacing needle head part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140122 |