CN203405262U - Liquid level sensor - Google Patents

Liquid level sensor Download PDF

Info

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
Authority
CN
China
Prior art keywords
probe
plug
liquid level
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.)
Active
Application number
CN201320466774.4U
Other languages
Chinese (zh)
Inventor
韩金凤
赵绪怀
张莉
崔艳梅
丁乡
王云香
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHIJIAZHUANG NO850 ELECTRONIC Co Ltd
Original Assignee
SHIJIAZHUANG NO850 ELECTRONIC Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHIJIAZHUANG NO850 ELECTRONIC Co Ltd filed Critical SHIJIAZHUANG NO850 ELECTRONIC Co Ltd
Priority to CN201320466774.4U priority Critical patent/CN203405262U/en
Application granted granted Critical
Publication of CN203405262U publication Critical patent/CN203405262U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Liquid level sensor
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.
CN201320466774.4U 2013-08-02 2013-08-02 Liquid level sensor Active CN203405262U (en)

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 Active CN203405262U (en) 2013-08-02 2013-08-02 Liquid level sensor

Country Status (1)

Country Link
CN (1) CN203405262U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Similar Documents

Publication Publication Date Title
CN105509838A (en) Throw-in type sensor
CN208125934U (en) A kind of water sensor
CN203405262U (en) Liquid level sensor
CN108020259A (en) A kind of device of while measurement temperature and pressure
CN201302473Y (en) Water level temperature sensor of solar water heater
CN206804173U (en) A kind of fixing device for cable type temperature sensor
CN204881935U (en) Capacitanc pressure sensing device
CN205120300U (en) Wireless transmission high -temperature melt pressure transmitter
CN204313927U (en) A kind of explosion-proof type radar level gauge
CN208833430U (en) Union pressure transmitter
CN210375302U (en) Differential pressure type accumulator liquid level meter
CN208223714U (en) A kind of oil field pressure transmitter
CN202903253U (en) Novel electromagnetic flow meter
CN202836812U (en) Thermal resistor
CN201993194U (en) Submerged type differential pressure transmitter
CN110411523A (en) A kind of high-voltage electromagnetic flow meter electrode packaging system
CN105318915B (en) A kind of moisture, hydrogen content and temperature transmitter suitable for transformer state on-line monitoring
CN204679207U (en) The two damping pressure transmitter of a kind of binodal
CN201568043U (en) Underground multifunctional corrosion rate detection device
CN204214487U (en) A kind of mounting structure of outer flow passage formula electrode of electromagnetic flowmeter
CN203643045U (en) High-reliability temperature sensor for water heater
CN203559130U (en) Anode setup package for cathode protection system of water tank
CN202424671U (en) Novel piezoelectric liquid level switch
CN206648695U (en) Flux of vortex street part
CN204479203U (en) NTC temperature sensor easily installed by washing machine

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant