CN214010484U

CN214010484U - Liquid level sensor

Info

Publication number: CN214010484U
Application number: CN202022635757.1U
Authority: CN
Inventors: 刘强; 齐有才; 刘坤; 齐金才
Original assignee: Dongguan Exin Electronic Technology Co ltd
Current assignee: Dongguan Exin Electronic Technology Co ltd
Priority date: 2020-11-14
Filing date: 2020-11-14
Publication date: 2021-08-20
Anticipated expiration: 2030-11-14

Abstract

The utility model belongs to the technical field of the sensor technique and specifically relates to indicate a level sensor, including shell, PCB board, floater, tongue tube, wiring end and connector, the shell is close to one side of wiring end is provided with exhaust duct, the utility model discloses accessible exhaust duct can carry out evacuation and bat pressure operation to the shell is inside, and the utility model discloses be provided with flexible pipeline between PCB board and the shell, can prevent that the in-process glue film at production from getting into to the shell inside, hollow design in the shell, shell oral area adopt exhaust duct to exhaust, arrange the pressure, reduce expend with heat and contract with cold and cause the influence to the tongue tube, at high temperature state, the inside gaseous inflation accessible exhaust duct of shell discharges, and shell hollow structure can stop the thermal energy extrusion to cause the influence to the tongue tube simultaneously, reaches high temperature resistant characteristic, improves product life, reinforcing product stability.

Description

Liquid level sensor

Technical Field

The utility model belongs to the technical field of the sensor technique and specifically relates to indicate a level sensor.

Background

The float switch is a conventional liquid level sensor, and the magnet and the reed switch are mutually matched, so that when a detected medium or liquid level of the float switch changes a floating ball, the floating ball drives the magnet to sense the reed switch in the shell to output an action signal, and then the equipment acquires the signal to detect the liquid level of the equipment, thereby achieving the purpose of detecting the water level of the water tank.

The inside solid embedment design that adopts of conventional float switch shell, and glue adopts hard high temperature resistant epoxy, and the extravagant raw and other materials of production process, the volume of pouring the glue is also not well controlled, easily produces the outward appearance bad, cuts the wire rod scheduling problem, inside solid embedment, the internal stress can't release, and the inside tongue tube of product can't enough protect, easily cracked causes the inefficacy phenomenon.

SUMMERY OF THE UTILITY MODEL

The utility model discloses problem to prior art provides a liquid level sensor.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a pair of liquid level sensor, including shell, PCB board, floater, tongue tube, wiring end and connector, the shell is cavity, the PCB board install in inside the shell, PCB board both ends are provided with the pyrocondensation pipe box, pyrocondensation pipe box butt in the PCB board with between the shell, floater slidable mounting in on the shell, the tongue tube install in on the PCB board, both ends are provided with the separation blade about on the shell, the wiring end with PCB board electric connection, the other end of wiring end with the connector is connected, the shell is close to one side of wiring end is provided with exhaust duct.

Preferably, a screw rod is arranged on the right side of the shell, a nut is arranged on the left side of the wiring end, the nut is in threaded connection with the screw rod, and a flat gasket is arranged between the screw rod and the nut.

Preferably, the middle part of the PCB is provided with a connecting hole, and two ends of the reed switch are inserted into the connecting hole.

Preferably, at least one reed switch is arranged.

Preferably, a glass fiber braided pipeline is arranged between the PCB and the shell, and the outer end of the PCB is sleeved with the glass fiber braided pipeline.

Preferably, the shell and the PCB are fixed through a glue layer, the exhaust pipeline penetrates through the glue layer and extends to the inside of the shell, and the glue layer is arranged on the outer side of the heat-shrinkable tube sleeve.

Preferably, the floating ball and the shell are both made of stainless steel.

Preferably, the exhaust pipeline is made of a teflon material.

The utility model has the advantages that:

the utility model provides a liquid level sensor, which comprises a shell, a PCB, a floating ball, a reed switch, a wiring end and a connector, wherein the PCB is arranged inside the shell, both ends of the PCB are provided with heat-shrinkable tube sleeves which are abutted between the PCB and the shell, the floating ball is slidably arranged on the shell, the reed switch is arranged on the PCB, the left end and the right end of the shell are provided with a baffle plate, the wiring end is electrically connected with the PCB, the other end of the wiring end is connected with the connector, one side of the shell close to the wiring end is provided with an exhaust pipeline, the utility model can perform evacuation and pressure beating operation on the inside of the shell through the exhaust pipeline, and the flexible pipeline is arranged between the PCB and the shell, thereby preventing a glue layer from entering the inside of the shell in the production process, the design of cavity in the shell, shell oral area adopt exhaust duct to exhaust, arrange the pressure, reduce expend with heat and contract with cold and cause the influence to the tongue tube, and at high temperature state, the inside gaseous inflation accessible exhaust duct of shell discharges, and shell hollow structure can stop the thermal energy extrusion simultaneously and cause the influence to the tongue tube, reaches high temperature resistant characteristic, improves product life, reinforcing product stability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an assembly schematic diagram of the reed switch of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

The reference numerals are respectively:

the device comprises a shell (1), a PCB (printed Circuit Board) plate (2), a floating ball (3), a reed switch (4), a wiring terminal (5), a connector (6), a heat-shrinkable tube sleeve (7), a baffle (8), an exhaust pipeline (9), a screw rod (10), a nut (11), a flat gasket (12), a connecting hole (13), a glass fiber braided pipeline (14) and an adhesive layer (15).

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-3, the present invention provides a liquid level sensor, which comprises a housing 1, a PCB 2, a floating ball 3, a reed switch 4, a terminal 5 and a connector 6, wherein the housing 1 is hollow, the PCB 2 is mounted inside the housing 1, two ends of the PCB 2 are provided with heat-shrinkable sleeves 7, the heat-shrinkable sleeves 7 are abutted between the PCB 2 and the housing 1, the floating ball 3 is slidably mounted on the housing 1, the reed switch 4 is mounted on the PCB 2, the housing 1 is provided with blocking pieces 8 at left and right ends, the terminal 5 is electrically connected with the PCB 2, the other end of the terminal 5 is connected with the connector 6, one side of the housing 1 close to the terminal is provided with an exhaust duct 9, the present invention can perform evacuation and pressure operations inside the housing 1 through the exhaust duct 9, and the utility model is provided with a telescopic pipeline between the PCB 2 and the shell 1, which can prevent the glue layer 15 from entering the shell 1 in the production process, and the utility model has simple structure, reasonable design and convenient use, when in use, the utility model is arranged in a water inlet tank, the water level change drives the floating ball 3 to move up and down, so that the reed switch 4 inside acts, the floating ball 3 switch on-off signal is collected through the PCB 2 to control the machine station to act, thereby monitoring the liquid level height of the water tank, the hollow design in the shell 1, the mouth part of the shell 1 adopts the exhaust pipeline 9 to exhaust and exhaust, thereby reducing the influence of expansion and contraction of heat on the reed switch 4, and in the high temperature state, the gas inside the shell can be exhausted through the exhaust pipeline 9, meanwhile, the hollow structure of the shell 1 can stop the expansion and extrusion of heat from influencing the reed switch 4, thereby reaching the high temperature resistance characteristic and improving the service life of the product, and the stability of the product is enhanced.

As shown in fig. 1 and 3, in this embodiment, in order to ensure the stability of the connection between the PCB 2 and the terminal 5, a screw 10 is disposed on the right side of the housing 1, a nut 11 is disposed on the left side of the terminal 5, the nut 11 is connected to the screw 10 in a threaded manner, and a flat gasket 12 is disposed between the screw 10 and the nut 11.

As shown in fig. 2, in this embodiment, 2 middle parts of PCB are provided with connecting hole 13, peg graft at the both ends of tongue tube 4 in connecting hole 13, the utility model discloses a tongue both ends weld in on 2 PCB, connecting hole 13 can play the positioning action to guarantee welded reliability, convenient welding.

As shown in fig. 1-3, in this embodiment, at least one reed switch 4 is provided, and the number of the reed switches 4 can be increased according to the requirement when in use.

In this embodiment, PCB board 2 with be provided with glass fiber between the shell 1 and weave pipeline 14, glass fiber weaves pipeline 14 cover and locates 2 outer ends of PCB board, glass fiber weaves pipeline 14 and can effectually play thermal-insulated and insulating, can prevent that PCB board 2 from burning out because of the high ambient temperature.

In this embodiment, the housing 1 and the PCB 2 are fixed by a glue layer 15, the exhaust duct 9 extends into the housing 1 through the glue layer 15, the glue layer 15 is disposed outside the heat-shrinkable tube sleeve 7, and the heat-shrinkable tube sleeve 7 can prevent glue from entering the housing 1 when dispensing.

In this embodiment, the floater 3 with shell 1 all adopts stainless steel to make, exhaust duct 9 adopts the teflon material to make, the utility model discloses a floater 3 and shell 1 all adopt stainless steel to make, can be high temperature resistant, can place and use in high temperature water.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A liquid level sensor, characterized by: the shell is hollow, the PCB is mounted inside the shell, heat-shrinkable tube sleeves are arranged at two ends of the PCB and abut against the PCB and the shell, the floating ball is slidably mounted on the shell, the reed switch is mounted on the PCB, blocking pieces are arranged at two ends of the shell, the wiring end is electrically connected with the PCB, the other end of the wiring end is connected with the connector, and an exhaust duct is arranged on one side, close to the wiring end, of the shell.

2. A liquid level sensor as claimed in claim 1, wherein: the shell right side is provided with the screw rod, the left side of wiring end is provided with the nut, nut threaded connection with on the screw rod, the screw rod with be provided with the flat pad between the nut.

3. A liquid level sensor as claimed in claim 1, wherein: the middle part of the PCB is provided with a connecting hole, and two ends of the reed switch are inserted in the connecting hole.

4. A liquid level sensor as claimed in claim 1, wherein: at least one reed pipe is arranged.

5. A liquid level sensor as claimed in claim 1, wherein: the PCB board with be provided with glass fiber between the shell and weave the pipeline, glass fiber weaves the pipeline cover and locates PCB board outer end.

6. A liquid level sensor as claimed in claim 1, wherein: the shell with the PCB board is fixed through the glue film, exhaust duct runs through the glue film and extends to inside the shell, the glue film set up in the pyrocondensation pipe box outside.

7. A liquid level sensor as claimed in claim 1, wherein: the floating ball and the shell are both made of stainless steel.

8. A liquid level sensor as claimed in claim 1, wherein: the exhaust pipeline is made of Teflon materials.