CN211577444U - Liquid leakage detection system - Google Patents

Abstract

The application discloses a liquid leakage detection system, which comprises a signal sending device, a signal receiving device and a liquid leakage detection probe; the leakage detection probe comprises an insulating shell, a liquid absorption sponge, solid electrolyte, a first metal probe and a second metal probe, the outer side of the liquid absorption sponge is used as a leakage detection surface of the leakage detection probe, and the positions of the solid electrolyte, the first metal probe and the second metal probe are fixed by the insulating shell and are not in contact with each other. When the leakage situation occurs, the leakage contacts with the solid electrolyte through the liquid absorption sponge, the solid electrolyte is dissolved and forms electrolyte solution with the leakage, the liquid absorption sponge absorbs the solution, once the solution enables a current path to be formed between the first metal probe and the second metal probe, the signal receiving device receives a feedback signal, and the leakage situation is judged to occur. The liquid leakage detection system is large in applicable object resistivity range, small in size of a liquid leakage detection probe, small in space limitation, and high in universality and convenience degree, and is obviously higher than the prior art.

Description

Liquid leakage detection system

Technical Field

The utility model relates to a weeping detection area, in particular to weeping detecting system.

Background

The current water leakage detection mainly detects common water such as tap water or rainwater, is widely applied to wading equipment such as a water dispenser, a water heater and the like, and mainly adopts mechanical floating ball detection or electronic detection.

However, the mechanical float ball detection is not suitable for the occasion with limited space, and the electronic detection is only suitable for common water and fails for other liquids with extremely high resistivity. With the emergence of the leakage detection requirements of various application occasions such as medicine enterprises and the like on liquids such as ultrapure water and the like, how to provide a leakage detection scheme which can be universally used for various liquids becomes a problem to be solved by technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a general leakage detecting system who is used for all kinds of liquid, does not receive space restriction. The specific scheme is as follows:

a liquid leakage detection system comprises a signal sending device, a signal receiving device and a liquid leakage detection probe, wherein:

the signal sending device is connected with the first end of the leakage detection probe and sends an excitation signal to the leakage detection probe;

the signal receiving device is connected with the second end of the liquid leakage detection probe and receives a feedback signal of the liquid leakage detection probe;

the weeping test probe includes insulating casing, imbibition sponge, solid-state electrolyte, passes first metal probe and the second metal probe of insulating casing, wherein:

the first end of the first metal probe is used as the first end of the leakage detection probe, the first end of the second metal probe is used as the second end of the leakage detection probe, the second end of the first metal probe and the second end of the second metal probe face the inner side of the liquid absorption sponge, the outer side of the liquid absorption sponge is used as the leakage detection surface of the leakage detection probe, and the solid electrolyte, the first metal probe and the second metal probe are fixed by the insulating shell and are not in contact with each other;

and when the leakage dissolves the solid electrolyte to generate an electrolyte solution and establish a current path of the first metal probe and the second metal probe, the leakage detection probe sends out the feedback signal according to the excitation signal.

Preferably, the solid electrolyte is disposed in a groove inside the insulating case.

Preferably, the liquid-absorbent sponge is filled in the insulating case to fix the positions of the solid electrolyte, the first metal probe, and the second metal probe.

Preferably, the insulation shell is provided with a matching and fixing structure.

Preferably, the matching and fixing structure is a threaded structure.

Preferably, the excitation signal is a pulse signal.

Preferably, the liquid leakage detection system further comprises a CPU connected to both the signal transmitting device and the signal receiving device, and configured to generate the excitation signal;

the signal transmission device includes: the driving capability of the excitation signal is enhanced, and the excitation signal is sent to a following operational amplifier unit of the leakage detection probe;

correspondingly, the signal receiving device comprises: a comparator and a bias circuit.

Preferably, the solid electrolyte is solid sodium chloride.

Preferably, the liquid detected by the leakage detection system comprises pure water or ultrapure water.

The application discloses weeping detecting system, including signal transmission device, signal reception device and weeping test probe, wherein: the signal sending device is connected with the first end of the leakage detection probe and sends an excitation signal to the leakage detection probe; the signal receiving device is connected with the second end of the liquid leakage detection probe and receives a feedback signal of the liquid leakage detection probe; the leakage detection probe comprises an insulating shell, liquid absorption sponge, solid electrolyte, a first metal probe and a second metal probe, wherein the first metal probe and the second metal probe penetrate through the insulating shell. When the electrolyte solution is generated by dissolving the solid electrolyte in the leakage solution and a current path of the first metal probe and the second metal probe is established, the leakage detection probe sends out the feedback signal according to the excitation signal, and the signal receiving device receives the feedback signal, so that the leakage condition is judged to occur. The liquid leakage detection system is large in applicable object resistivity range, small in size of a liquid leakage detection probe, small in space limitation, and high in universality and convenience degree, and is obviously higher than the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a structural distribution diagram of a liquid leakage detection system according to an embodiment of the present invention;

fig. 2 is a structural distribution diagram of a liquid leakage detection probe according to an embodiment of the present invention;

fig. 3a is a structural distribution diagram of a specific leakage detection probe according to an embodiment of the present invention;

fig. 3b is a structural distribution diagram of another specific leakage detection probe according to an embodiment of the present invention;

fig. 4 is a circuit structure diagram of a CPU according to an embodiment of the present invention;

fig. 5 is a circuit structure diagram of a multi-path operational amplifier circuit according to an embodiment of the present invention;

fig. 6 is a structural distribution diagram of a matching unit according to an embodiment of the present invention;

fig. 7 is a structural distribution diagram of a bias circuit according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the prior art, mechanical floating ball detection is not suitable for occasions with limited space, and electronic detection is only suitable for common water and fails for other liquids with extremely high resistivity. The application is that the suitable object resistivity range of weeping detecting system is great in this application, and weeping test probe volume is less, receives the space restriction little, and commonality and convenient degree are obviously higher than prior art.

The embodiment of the utility model discloses weeping detecting system, it is shown with fig. 2 to refer to fig. 1, including signal transmission device 1, signal reception device 2 and weeping test probe 3, wherein:

the signal sending device 1 is connected with a first end of the leakage detection probe 3 and sends an excitation signal to the leakage detection probe 3;

the signal receiving device 2 is connected with the second end of the leakage detection probe 3 and receives a feedback signal of the leakage detection probe 3;

the liquid leakage detecting probe 3 includes an insulating case 31, a liquid-absorbing sponge 32, a solid electrolyte 33, a first metal probe 34 and a second metal probe 35 penetrating the insulating case 31, wherein:

the first end of the first metal probe 34 is used as the first end of the leakage detection probe 3, the first end of the second metal probe 35 is used as the second end of the leakage detection probe 3, the second end of the first metal probe 34 and the second end of the second metal probe 35 both face the inner side of the liquid absorption sponge 32, the outer side of the liquid absorption sponge 32 is used as the leakage detection surface of the leakage detection probe 3, and the positions of the solid electrolyte 33, the first metal probe 34 and the second metal probe 35 are fixed by the insulating shell 31 and are not in contact with each other;

when the electrolyte solution is generated by dissolving the solid electrolyte 33 by the leakage solution and establishing a current path between the first metal probe 34 and the second metal probe 35, the leakage detection probe 3 sends a feedback signal according to the excitation signal. It can be understood that the second end of the first metal probe 34 and the second end of the second metal probe 35 can be respectively contacted with the inner side of the liquid absorbing sponge 32, and at this time, no matter the space direction of the liquid leakage detecting probe 3, the liquid leakage detecting object 4 can be contacted with the liquid leakage detecting surface, so that the liquid leakage is absorbed by the liquid absorbing sponge 32 when the liquid leakage occurs, and therefore, the liquid leakage detecting probe 3 can be applied to the ground water accumulation condition; the object 4 to be detected for leakage may be located above or laterally above the detection surface for leakage, and once leakage occurs, the leakage can be dropped onto the liquid absorbing sponge 32 under the influence of gravity. When the liquid absorbed by the liquid absorbing sponge 32 is enough, the leaked liquid will contact with the solid electrolyte 33 and dissolve it, generating an electrolyte solution, and the electrolyte solution in the liquid absorbing sponge 32 establishes a current path between the first metal probe 34 and the second metal probe 35, so that the excitation signal passing through the first metal probe 34 enters the second metal probe 35 through the electrolyte solution, and is sent to the signal receiving device 2 as a feedback signal.

Of course, the second end of the first metal probe 34 and the second end of the second metal probe 35 may not contact with the inner side of the liquid absorption sponge 32, and at this time, a feedback signal is sent, and it is necessary that the object 4 to be detected by leakage is located above or laterally above the leakage detection surface, and the leakage can fall onto the liquid absorption sponge 32 under the influence of gravity, and when the leakage absorbed in the liquid absorption sponge 32 is saturated and flows down, the leakage will dissolve the solid electrolyte 33 and establish a current path between the two probes 34 and 35 in the form of an electrolyte solution, thereby avoiding the occurrence of the situation that the liquid absorption sponge 32 absorbs too much moisture in the air and dissolves the solid electrolyte 33.

Further, the liquid leakage detection system in this embodiment may further include a processor 5, configured to control the signal sending device 1 to send an excitation signal, and determine the liquid leakage condition according to the feedback signal and take corresponding processing measures, for example, if it is determined that the liquid leakage occurs, send an alarm message or perform relevant processing such as closing the water inlet valve on the liquid leakage detection object, and for example, determine that an element in the liquid leakage detection system is faulty according to the feedback signal, send an alarm message to remind a worker to overhaul the liquid leakage detection system.

The application discloses a liquid leakage detection system, which comprises a signal sending device, a signal receiving device and a liquid leakage detection probe; the leakage detection probe comprises an insulating shell, liquid absorption sponge, solid electrolyte, a first metal probe and a second metal probe. When the leakage condition occurs, the leakage can be contacted with the solid electrolyte through the liquid absorption sponge, the solid electrolyte is dissolved and forms electrolyte solution with the leakage, the liquid absorption sponge absorbs the solution, once the solution enables a current path to be formed between the first metal probe and the second metal probe, the signal receiving device can receive a feedback signal, and therefore the leakage condition is judged to occur. The liquid leakage detection system is large in applicable object resistivity range, small in size of a liquid leakage detection probe, small in space limitation, and high in universality and convenience degree, and is obviously higher than the prior art.

The embodiment of the utility model discloses specific weeping detecting system, for last embodiment, further explanation and optimization have been made to technical scheme to this embodiment. Specifically, the present embodiment further describes the leakage detecting probe 3:

it can be understood that, in order to detect whether the liquid leakage phenomenon exists, the first metal probe 34 and the second metal probe 35 are required to only establish a path through the electrolyte solution, if there is no liquid leakage, that is, when there is no path through the electrolyte solution in the liquid absorbing sponge 32, the first metal probe 34 and the second metal probe 35 are not in contact with each other, further considering the possible moisture-absorbing conductive effect of the solid electrolyte 33 on the metal probes, the physical structures of the first metal probe 34, the second metal probe 35 and the solid electrolyte 33 are required to be not in contact with each other in this embodiment. The liquid-absorbing sponge 32, in addition to serving as a medium carrier of the electrolyte solution to establish a current path for the first metal probe 34 and the second metal probe 35, can fix the physical positions of the first metal probe 34, the second metal probe 35 and the solid electrolyte 33 so as to prevent them from moving or falling out of the insulating case 31, and the fixing action of the liquid-absorbing sponge 32 can be performed in conjunction with the insulating case 31.

Under the requirement, at least two alternatives are as follows:

referring to fig. 3a, a solid electrolyte 33 is disposed in a recess inside the insulating case 31. The solid electrolyte 33 may not be in contact with the liquid-absorbent sponge 32, allowing the solid electrolyte 33 to be unfilled in the internal recess because sufficient weeping occurs to contact and dissolve the solid electrolyte 33 through the liquid-absorbent sponge 32. The wicking sponge 32 generally seals the notches of the internal recess of the insulating shell 31 from the solid electrolyte 33 leaking therefrom.

At this time, the first and second metal probes 34 and 35 can be fixed by the insulating case 31 and/or the liquid-absorbing sponge 32 to prevent displacement.

Referring to fig. 3b, a liquid-absorbent sponge 32 is filled inside the insulating case 31 to fix the positions of the solid electrolyte 33, the first metal probes 34, and the second metal probes 35.

This solution does not require internal recesses in the insulating housing 31, since the task of fixing the solid electrolyte 33 can be independently undertaken by the liquid-absorbing sponge 32, which also enables the fixing and the mutual contactless effect to be achieved. Or the liquid absorbing sponge 32 is considered to completely fill all the empty parts in the insulating shell 31 at this time, and whether the insulating shell 31 has the internal groove or not does not influence the fixing and non-contact effect. It is understood that the purpose of the above two schemes is to avoid the first metal probe 34, the second metal probe 35 and the solid electrolyte 33 from contacting, especially the fixed solid electrolyte 33 from moving randomly, the structure of fig. 3a and 3b is only an example, and the length of the two metal probes, whether contacting with the liquid-absorbing sponge 32 or entering the liquid-absorbing sponge 32, the depth of the inner groove of the insulating shell 31, the thickness of the liquid-absorbing sponge 32, etc. can be adjusted according to the actual requirements, and the related schemes belong to the protection scope of the present application. Further, the insulating case 31 may be selected to have various shapes with an upper top surface opening covered by a liquid absorbing sponge 32, such as a cap-less cylinder, according to the needs of the application. Further, in order to widen the application environment of the leakage detection probe, a fitting fixing structure may be provided on the insulating case 31. The matching fixing structure can be a threaded structure, and can also be a buckle or other fixing structures, so that the insulating shell 31 can be fixed on a leakage detection object.

It will be appreciated that the type of solid electrolyte 33 in this embodiment follows firstly the principle of being soluble in the liquid to be tested and secondly, for higher accuracy and longer life, a solid electrolyte is generally chosen that is chemically stable, not readily reactive with ambient gases, non-corrosive, high in melting point, less hygroscopic and not prone to mildew, for example solid sodium chloride.

Further, the liquid detected by the leakage detection system comprises pure water or ultrapure water. It can be understood that the water commonly detected in the prior art is ordinary water containing impurities, the resistivity is low, the water leakage detection can be performed through common electronization detection, the production line related to chemicals has requirements on pure water and ultrapure water, the resistivity of the pure water and the ultrapure water is very high, and the conventional electronization detection cannot be used, so that the water leakage detection requirement of the high-resistivity liquid is met by the liquid leakage detection probe 3 in the embodiment, and the detectable liquid leakage resistivity range is obviously larger than that of the conventional electronization detection.

Of course, the liquid leakage detection may be performed for other high resistivity liquids besides pure water and ultrapure water, following the principle that the solid electrolyte 33 is soluble in the liquid to be detected.

The embodiment of the utility model discloses specific weeping detecting system, for last embodiment, further explanation and optimization have been made to technical scheme to this embodiment.

Wherein, the excitation signal is specifically a pulse signal.

Specifically, the liquid leakage detection system further comprises a CPU connected with the signal sending device and the signal receiving device and used for generating an excitation signal;

the signal transmission device includes: enhancing the driving capability of the excitation signal and sending the excitation signal to a following operational amplifier unit of the leakage detection probe;

accordingly, the signal receiving apparatus includes: a comparator and a bias circuit.

Referring to fig. 4-7, wherein fig. 4 is a circuit of a CPU, fig. 5 is a multi-path operational amplifier circuit for simultaneously realizing the function of the operational amplifier unit and the function of the comparator, fig. 6 is a matching unit for connecting the multi-path operational amplifier circuit and the leakage detection probe, and fig. 7 is a bias circuit for providing a bias level to prevent the polarization phenomenon from occurring under the excitation condition of the continuous pulse signal of the electrolyte solution, so that the feedback signal truly reflects the leakage situation.

Specifically, in fig. 4, the CPU continuously or periodically generates a pulse signal as the excitation generation signal STM32_ LEAK _ OUT to be output to the pin 34 as the signal source of the liquid leakage detection system.

In the multi-path operational amplifier circuit in fig. 5, the excitation generation signal STM32_ LEAK _ OUT is subjected to amplification and then follows the enhanced driving capability to form an excitation signal EXT _ LEAK _ OUT.

In FIG. 6, the excitation signal EXT _ LEAK _ OUT is transmitted to the X1 connector, and the X1 connector is connected with the leakage detection probe. When the X1 connector is connected to the LEAK detection probe, the excitation signal EXT _ LEAK _ OUT is transmitted to the first metal probe 34 of the LEAK detection probe shown in fig. 2 via a cable.

If a water leakage condition occurs, the first metal probe 34 and the second metal probe 35 IN fig. 2 establish a current loop, and the excitation signal EXT _ LEAK _ OUT is transmitted to the X1 plug connector through the first metal probe 34 and the second metal probe 35 to form a feedback signal EXT _ LEAK _ IN.

The multiple-way operational amplifier circuit IN fig. 5 receives the feedback signal EXT _ LEAK _ IN, compares it with the reference voltage on pin 6 on chip D2, and outputs a feedback generation signal SMT32_ LEAK _ IN to the CPU.

It will be appreciated that the CPU may now be considered as a processor IN the above embodiments, taking further decisions and processing actions based on the feedback occurrence signal SMT32_ LEAK _ IN.

Further, fig. 7 shows a bias circuit, which includes a high-precision power chip and a series resistor, where the series resistor is located between the feedback signal output end and the power chip output end, and the bias circuit further includes a ground capacitor, and the ground capacitor is connected to both the series resistor and the power chip output end. The bias circuit is used for providing a bias level to prevent the electrolyte solution from generating a polarization phenomenon under the excitation condition of the continuous pulse signal, so that the interference IN the detection process can be eliminated, the misjudgment caused by the polarization of the electrolyte solution is avoided, the feedback signal truly reflects the liquid leakage condition, and the feedback signal EXT _ LEAK _ IN is more accurate.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, scheme, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, scheme, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, scheme, article or apparatus that comprises the element.

The above detailed description is made on the liquid leakage detection system provided by the present invention, and the principle and the implementation of the present invention are explained by applying a specific example, and the description of the above embodiment is only used to help understanding the scheme and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (9)

1. A liquid leakage detection system is characterized by comprising a signal sending device, a signal receiving device and a liquid leakage detection probe, wherein:

the signal sending device is connected with the first end of the leakage detection probe and sends an excitation signal to the leakage detection probe;

the signal receiving device is connected with the second end of the liquid leakage detection probe and receives a feedback signal of the liquid leakage detection probe;

the weeping test probe includes insulating casing, imbibition sponge, solid-state electrolyte, passes first metal probe and the second metal probe of insulating casing, wherein:

the first end of the first metal probe is used as the first end of the liquid leakage detection probe, the first end of the second metal probe is used as the second end of the liquid leakage detection probe, the second end of the first metal probe and the second end of the second metal probe face the inner side of the liquid absorption sponge, the outer side of the liquid absorption sponge is used as a liquid leakage detection surface of the liquid leakage detection probe, and the solid electrolyte, the first metal probe and the second metal probe are fixed in position and are not in contact with each other;

and when the leakage dissolves the solid electrolyte to generate an electrolyte solution and establish a current path of the first metal probe and the second metal probe, the leakage detection probe sends out the feedback signal according to the excitation signal.

2. The leak detection system of claim 1, wherein the solid electrolyte is disposed in a recess within the insulating housing.

3. The leakage detection system of claim 1 wherein said wicking sponge is filled within said insulating housing to fix the position of said solid electrolyte, said first metal probe, and said second metal probe.

4. The leak detection system of claim 1, wherein the insulating housing is provided with a mating securing structure.

5. The leak detection system of claim 4, wherein the cooperating fixture structure is a threaded structure.

6. The leakage detection system of claim 1 wherein said excitation signal is embodied as a pulse signal.

7. The leakage detection system of claim 6 further comprising a CPU coupled to both said signal transmitting means and said signal receiving means for generating said excitation signal;

the signal transmission device includes: the driving capability of the excitation signal is enhanced, and the excitation signal is sent to a following operational amplifier unit of the leakage detection probe;

correspondingly, the signal receiving device comprises: a comparator and a bias circuit.

8. The leak detection system according to any one of claims 1 to 7, wherein the solid electrolyte is solid sodium chloride.

9. The leak detection system according to claim 8, wherein the liquid detected by the leak detection system comprises pure water or ultrapure water.

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