CN215109242U

CN215109242U - Liquid level sensor and fuel filter

Info

Publication number: CN215109242U
Application number: CN202120566462.5U
Authority: CN
Inventors: 陈永峤; 何骁
Original assignee: Shanghai Fleetguard Filter Co ltd
Current assignee: Shanghai Fleetguard Filter Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-12-10
Anticipated expiration: 2031-03-19

Abstract

The utility model relates to a sensor technical field specifically discloses a level sensor and fire oil filter. The sensor is used for detecting the liquid level of first liquid in the filter cylinder and comprises a low liquid level probe, a middle liquid level probe arranged above the low liquid level probe and a high liquid level probe arranged above the middle liquid level probe; when the high liquid level probe contacts the liquid surface, the liquid level sensor outputs a drainage starting signal; when the middle liquid level probe is exposed out of the liquid level, the liquid level sensor outputs a water drainage stopping signal; when the low liquid level probe is exposed out of the liquid surface, the liquid level sensor outputs a liquid level alarm signal. By means of the arrangement of the three probes, the sensor can automatically send out a water discharge starting/stopping signal and send out an alarm signal under the condition that the liquid level is too low, so that the detection capability of the sensor is improved. The control assembly of the fuel filter can control the drain valve to start/stop draining and the alarm assembly to work according to the signal output by the liquid level sensor, so that the use safety of the fuel filter is ensured.

Description

Liquid level sensor and fuel filter

Technical Field

The utility model relates to a sensor technical field especially relates to a level sensor and fire oil filter.

Background

With the progress of technology, in order to meet the requirements of accurate drainage and automatic operation, more and more fuel filters are provided with self-drainage systems to replace the existing manual drain valves. Most of self-drainage systems comprise two important parts, namely an automatic drainage valve and a double-liquid-level sensor, wherein the double-liquid-level sensor is mainly used for giving high-low liquid-level alarm information and driving the automatic drainage valve to be opened or closed by a control unit, so that the automatic drainage function is realized.

At present, current two level sensor only have two warning liquid levels, consider automatic drain valve's reliability and the risk of impurity jam in the fuel, when the unable fault of closing appears behind automatic drain valve drainage, will unable by monitoring discernment, can be because automatic drain valve's sealed bad, lead to the fuel to leak, the polluted environment also can cause the unable normal start of engine simultaneously, perhaps start the back engine power not enough, the potential safety hazard occasionally traveles.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a level sensor and fire oil filter to solve level sensor and be difficult to detect out the problem of potential safety hazard.

To achieve the purpose, the utility model adopts the following technical proposal:

a liquid level sensor is used for detecting the liquid level of first liquid in a filter cylinder and comprises a low liquid level probe, a middle liquid level probe and a high liquid level probe; the middle liquid level probe is arranged above the low liquid level probe; the high liquid level probe is arranged above the middle liquid level probe; when the high liquid level probe contacts the liquid level of the first liquid, the liquid level sensor outputs a drainage starting signal; when the middle liquid level probe is exposed out of the liquid level of the first liquid, the liquid level sensor outputs a drainage stopping signal; when the low liquid level probe is exposed out of the liquid level of the first liquid, the liquid level sensor outputs a liquid level alarm signal.

The liquid level sensor also comprises a low liquid level signal processing module, a middle liquid level signal processing module, a high liquid level signal processing module and a common probe, wherein the common probe and the low liquid level probe are arranged at the same height, and the common probe can acquire a common liquid level signal; the high liquid level probe can collect a high liquid level signal, the high liquid level signal processing module receives the high liquid level signal and the public liquid level signal and processes the high liquid level signal and the public liquid level signal to obtain a first initial value, and the first initial value outputs a drainage starting signal after being processed; the middle liquid level probe can collect a middle liquid level signal, the middle liquid level signal processing module receives the middle liquid level signal and the public liquid level signal, processes the middle liquid level signal and the public liquid level signal to obtain a second initial value, and outputs a drainage stopping signal after the second initial value is processed; the low liquid level probe can collect low liquid level signals, the low liquid level signal processing module receives the low liquid level signals and the public liquid level signals, processes the low liquid level signals and the public liquid level signals to obtain a third initial value, and outputs liquid level alarm signals after the third initial value is processed.

Furthermore, the liquid level sensor further comprises an upper shell and a lower shell fixedly connected with the upper shell, the public probe, the low liquid level probe, the medium liquid level probe and the high liquid level probe are arranged on the upper shell, and the upper shell can be inserted into the filter cylinder.

Still further, still be equipped with the external screw thread on the upper housing, enable level sensor can with it is strained a looks spiro union to strain.

Preferably, the common probe and the low level probe are separately arranged at two sides of the upper shell.

Preferably, a liquid baffle is arranged at the edge of one end of the lower shell, which is connected with the upper shell, and the liquid baffle encloses a liquid baffle groove capable of containing the first liquid.

Furthermore, a liquid through hole is formed in the lower shell, and the liquid through hole is communicated with the liquid blocking groove and the external environment.

A fuel filter comprises a filter cylinder, a drain valve, an alarm assembly, a control assembly and the liquid level sensor, wherein the drain valve and the liquid level sensor are connected onto the filter cylinder in an inserted mode, and the control assembly can control the drain valve to start/stop draining and the alarm assembly to work according to signals output by the liquid level sensor.

Preferably, the filter cartridge also contains a second liquid that floats on top of the first liquid.

Preferably, the alarm assembly is a horn.

The utility model has the advantages that:

the liquid level sensor automatically sends out a water discharging starting/stopping signal by means of the arrangement of a low liquid level probe, a medium liquid level probe and a high liquid level probe which are different in height from each other, and can also send out an alarm signal under the condition that the liquid level is too low; the liquid level sensor is arranged, so that the detection capability of the liquid level sensor is improved, a user can find the problem that the liquid level in the filter cylinder is too low as early as possible, and further the potential safety hazard can be eliminated as early as possible.

The fuel filter can automatically complete the starting/stopping water drainage operation of the drain valve by means of the arrangement of the liquid level sensor, and can automatically work the alarm assembly under the condition of abnormal liquid level, so that users are reminded, the potential safety hazard of the fuel filter is avoided, and the use safety of the fuel filter is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a liquid level sensor provided in an embodiment of the present invention;

fig. 2 is a cross-sectional view of a liquid level sensor provided by an embodiment of the present invention.

In the figure:

100. an upper housing; 110. a high level probe; 111. a high liquid level pin; 120. a medium liquid level probe; 121. a middle liquid level pin; 130. a low level probe; 131. a low liquid level pin; 140. a common probe; 141. a ground pin; 150. an external thread; 151. a liquid discharge tank;

200. a lower housing; 210. a lead groove; 220. a liquid blocking groove; 230. a liquid through hole; 240. and (5) sealing rings.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 and 2, the present embodiment provides a level sensor for detecting the level of a first liquid in a filter cartridge, comprising a low level probe 130, a medium level probe 120, and a high level probe 110; the medium level probe 120 is disposed above the low level probe 130; the high level probe 110 is disposed above the mid level probe 120; when the high level probe 110 contacts the level of the first liquid, the level sensor outputs a start drain signal; when the middle liquid level probe 120 reveals the liquid level of the first liquid, the liquid level sensor outputs a drainage stopping signal; the level sensor outputs a level alarm signal when the low level probe 130 reveals the level of the first liquid. The low level probe 130, the middle level probe 120 and the high level probe 110 with different heights enable the sensor to automatically send out a water discharge starting/stopping signal and send out an alarm signal under the condition that the liquid level is too low; the liquid level sensor is arranged, so that the detection capability of the liquid level sensor is improved, a user can find the problem that the liquid level in the filter cylinder is too low as early as possible, and further the potential safety hazard can be eliminated as early as possible.

In this embodiment, the liquid level sensor further includes a low liquid level signal processing module, a medium liquid level signal processing module, a high liquid level signal processing module, and a common probe 140, the common probe 140 and the low liquid level probe 130 are arranged at the same height, and the common probe 140 can collect a common liquid level signal; the high liquid level probe 110 can collect a high liquid level signal, the high liquid level signal processing module receives the high liquid level signal and the public liquid level signal, processes the high liquid level signal and the public liquid level signal to obtain a first initial value, and outputs a drainage starting signal after the first initial value is processed; the middle liquid level probe 120 can collect a middle liquid level signal, the middle liquid level signal processing module receives the middle liquid level signal and the public liquid level signal, processes the middle liquid level signal and the public liquid level signal to obtain a second initial value, and outputs a drainage stopping signal after the second initial value is processed; the low liquid level probe 130 can collect a low liquid level signal, the low liquid level signal processing module receives the low liquid level signal and the public liquid level signal, processes the low liquid level signal and the public liquid level signal to obtain a third initial value, and outputs a liquid level alarm signal after the third initial value is processed. Through signal transmission to low liquid level signal processing module with low liquid level probe 130 and public probe 140 gather, signal transmission to well liquid level signal processing module with well liquid level probe 120 and public probe 140 gather, signal transmission to high liquid level signal processing module with high liquid level probe 110 and public probe 140 gather, through low liquid level signal processing module, the liquid level is judged to the voltage signal of output after the processing of well liquid level signal processing module and high liquid level signal processing module and peripheral circuit, can more accurately detect the liquid level.

In this embodiment, the initial values output by the low liquid level signal processing module, the medium liquid level signal processing module and the high liquid level signal processing module are all respectively required to be externally connected with a pull-up resistor and a power supply, and finally, the liquid level is judged through the output level.

The embodiment of the utility model provides an in, through setting up low liquid level probe 130, well liquid level probe 120, high liquid level probe 110 and public probe 140, signal transmission to low liquid level signal processing module with low liquid level probe 130 and public probe 140 gather, signal transmission to well liquid level signal processing module with well liquid level probe 120 and public probe 140 gather, signal transmission to high liquid level signal processing module with high liquid level probe 110 and public probe 140 gather, through low liquid level signal processing module, the initial value that obtains after well liquid level signal processing module and the processing of high liquid level signal processing module is again through the voltage signal who handles output and judges the liquid level, the monitoring liquid level of being more convenient for, and more integrated, when needs monitoring liquid level, need not set up a plurality of level sensor, only with this level sensor can more accurately survey the liquid level.

In other embodiments of the present invention, the common probe 140 may be three, that is, a first common probe, a second common probe and a third common probe, the first common probe and the low liquid level probe 130 are connected to the low liquid level signal processing module, the second common probe and the middle liquid level probe 120 are connected to the middle liquid level signal processing module, and the third common probe and the high liquid level probe 110 are connected to the high liquid level signal processing module.

Further, the liquid level sensor further comprises an upper shell 100 and a lower shell 200 fixedly connected with the upper shell 100, the common probe 140, the low liquid level probe 130, the middle liquid level probe 120 and the high liquid level probe 110 are all arranged on the upper shell 100, and the upper shell 100 can be inserted into the filter cartridge. The arrangement of the upper housing 100 determines the relative positions of the common probe 140, the low level probe 130, the medium level probe 120 and the high level probe 110, and avoids the relative positions of the probes from shifting due to accidents. Specifically, the lower case 200 is integrally formed with the upper case 100.

In this embodiment, the upper housing 100 is further provided with external threads 150 to enable the liquid level sensor to be screwed with the filter cartridge. The arrangement of the external thread 150 not only enables the liquid level sensor to be detachably connected with the filter cartridge, and further determines the relative position between the liquid level sensor and the filter cartridge, but also effectively avoids the leakage of the first liquid from the joint in the filter cartridge.

Furthermore, the external thread 150 is further provided with a liquid discharge groove 151, and the liquid discharge groove 151 penetrates through the external thread 150. The provision of the drain tank 151 provides a way for the first liquid in the cartridge to drain when the level sensor is removed, reducing the probability of a first liquid splash condition occurring.

Preferably, a packing 240 is installed below the upper housing 100, and the packing 240 can be in contact with the filter cartridge. The sealing ring 240 is abutted against the filter cartridge to seal the joint of the liquid level sensor and the filter cartridge, so that the first liquid is prevented from flowing out of the joint.

In the present embodiment, the common probe 140 and the low level probe 130 are separately disposed at both sides of the upper housing 100. Specifically, the mid 120 and high 110 level probes are disposed between the common probe 140 and the low level probe 130. In other embodiments of the present invention, a pvc baffle is provided between the common probe 140 and the low level probe 130. By means of the arrangement, the liquid drop can not be conducted under the condition of adhering to the probe of the liquid level sensor, and the false alarm condition is prevented.

Preferably, the edge of the end of the lower casing 200 connected to the upper casing 100 is provided with a liquid baffle plate, and the liquid baffle plate encloses a liquid baffle groove 220 capable of containing the first liquid. The liquid retaining groove 220 is convenient for a user to treat the first liquid leaked from the joint in the process of disassembling the liquid level sensor, the splashing condition of the first liquid in the disassembling process is avoided, and the pollution to the external environment is effectively reduced.

Further, a liquid through hole 230 is further formed in the lower housing 200, and the liquid through hole 230 communicates the liquid blocking groove 220 with the external environment. The liquid through hole 230 facilitates the operation of discharging the first liquid in the liquid blocking groove 220 by a user.

In this embodiment, the low liquid level signal processing module, the middle liquid level signal processing module and the high liquid level signal processing module are all disposed in the lower housing 200; still seted up pin groove 210 on lower casing 200, be equipped with in the pin groove 210 with low liquid level signal processing module communication connection's low liquid level pin 131, with well liquid level signal processing module communication connection's well liquid level pin 121, with high liquid level signal processing module communication connection's high liquid level pin 111 and with low liquid level signal processing module, well liquid level signal processing module and the equal ground pin 141 of electricity connection of high liquid level signal processing module. By means of the arrangement, the structure of the liquid level sensor is simpler, the wire harnesses used for assembly are reduced, the liquid level sensor is more convenient to manufacture, and the production cost is also reduced through structure and manufacturing optimization; and reduced the leakage point, improved the leakproofness, avoided the easy problem of intaking of circuit between level sensor and the pencil and between pencil and the received signal subassembly, strengthened the stability of circuit, still guaranteed the security that level sensor used through the ground connection setting of ground pin 141 simultaneously.

Specifically, the pin slot 210 is disposed with its opening facing downward. The downward facing arrangement reduces the likelihood of the first liquid entering the pin slot 210, effectively extending the useful life of the level sensor.

The embodiment also provides a fuel filter, including straining a section of thick bamboo, drain valve, alarm component, control module and foretell level sensor, drain valve and level sensor peg graft on straining a section of thick bamboo, and control module can start/stop drainage and alarm component work according to the signal control drain valve of level sensor output. With the help of the arrangement, the fuel filter can automatically complete the starting/stopping water discharging operation of the drain valve, and can automatically work the alarm assembly under the condition of abnormal liquid level, so that a user is reminded, the potential safety hazard of the fuel filter is avoided, and the use safety of the fuel filter is ensured.

In this embodiment, the cartridge also contains a second liquid that floats on top of the first liquid. Specifically, the first liquid is water and the second liquid is fuel oil.

Preferably, the alarm assembly is a horn. In other embodiments of the present invention, the alarm assembly is an indicator light.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A fluid level sensor for sensing a level of a first fluid within a filter cartridge, comprising:

a low level probe (130);

a medium level probe (120) disposed above the low level probe (130);

a high level probe (110) disposed above the mid level probe (120);

the level sensor outputs a start drain signal when the high level probe (110) contacts the level of the first liquid; when the middle liquid level probe (120) exposes the liquid level of the first liquid, the liquid level sensor outputs a drainage stopping signal; when the low liquid level probe (130) exposes the liquid level of the first liquid, the liquid level sensor outputs a liquid level alarm signal.

2. The liquid level sensor of claim 1, further comprising a low liquid level signal processing module, a medium liquid level signal processing module, a high liquid level signal processing module, and a common probe (140), wherein the common probe (140) and the low liquid level probe (130) are arranged at the same height, and the common probe (140) can collect a common liquid level signal;

the high liquid level probe (110) can collect a high liquid level signal, the high liquid level signal processing module receives the high liquid level signal and the public liquid level signal, processes the high liquid level signal and the public liquid level signal to obtain a first initial value, and outputs a drainage starting signal after the first initial value is processed;

the middle liquid level probe (120) can collect a middle liquid level signal, the middle liquid level signal processing module receives the middle liquid level signal and the public liquid level signal, processes the middle liquid level signal and the public liquid level signal to obtain a second initial value, and outputs a drainage stopping signal after the second initial value is processed;

the low liquid level probe (130) can collect a low liquid level signal, the low liquid level signal processing module receives the low liquid level signal and the public liquid level signal, processes the low liquid level signal and the public liquid level signal to obtain a third initial value, and outputs a liquid level alarm signal after the third initial value is processed.

3. The liquid level sensor according to claim 2, further comprising an upper housing (100) and a lower housing (200) fixedly connected to the upper housing (100), wherein the common probe (140), the low liquid level probe (130), the middle liquid level probe (120) and the high liquid level probe (110) are disposed on the upper housing (100), and the upper housing (100) is capable of being inserted into the filter cartridge.

4. A liquid level sensor according to claim 3, characterized in that the upper housing (100) is further provided with an external thread (150) enabling the liquid level sensor to be screwed with the filter cartridge.

5. A liquid level sensor according to claim 3, wherein the common probe (140) and the low level probe (130) are provided separately on both sides of the upper housing (100).

6. A liquid level sensor according to claim 3, characterized in that the edge of the end of the lower housing (200) connected to the upper housing (100) is provided with a liquid barrier enclosing a liquid barrier tank (220) capable of containing the first liquid.

7. The liquid level sensor according to claim 6, wherein the lower housing (200) further defines a liquid passing hole (230), and the liquid passing hole (230) communicates the liquid blocking groove (220) with the external environment.

8. A fuel filter, characterized by comprising a filter cartridge, a drain valve, an alarm component, a control component and the liquid level sensor of any one of claims 1-7, wherein the drain valve and the liquid level sensor are inserted on the filter cartridge, and the control component can control the drain valve to start/stop draining and the alarm component to work according to signals output by the liquid level sensor.

9. The fuel filter of claim 8, further comprising a second liquid contained within the cartridge, the second liquid floating on top of the first liquid.

10. The fuel filter of claim 8 wherein the warning component is a horn.