Liquid leakage detection sensor

Abstract

The utility model discloses a liquid leakage detection sensor which comprises a liquid leakage detection FPC and a woven mesh tube, the liquid leakage detection FPC is arranged in the woven mesh tube in a penetrating mode, the liquid leakage detection FPC comprises a base body, a first wire and a second wire, the first wire and the second wire are arranged on the base body, and the first wire and the second wire are arranged in a spaced mode. According to the liquid leakage detection sensor, the liquid leakage detection FPC is selected, a braided rope does not need to be wrapped outside the first wire and the second wire, and only the braided net tube is sleeved outside the liquid leakage detection FPC, so that the cross sectional area of the liquid leakage detection sensor can be reduced, the volume miniaturization of the liquid leakage detection sensor is facilitated, the liquid leakage detection FPC is of a strip-shaped structure, and the thickness of the liquid leakage detection FPC is smaller than that of the wire wrapping the braided rope; therefore, the liquid leakage detection device can be conveniently wound on a liquid conveying pipeline needing liquid leakage detection, and the applicability of the liquid leakage detection device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid leakage detection, in particular to a liquid leakage detection sensor. Background Art

[0002] Since the liquid delivery pipeline may leak during use, if leakage occurs, it will not only cause liquid loss, but also damage the equipment. For example, for a liquid cooling device that cools the server, if the liquid delivery pipeline leaks, it will cause a short circuit in the server's circuit board and even burn out the server.

[0003] In the process of implementing this application, the inventors found that there are at least the following technical problems in the prior art:

[0004] At present, liquid leakage detection sensors are mainly used to detect liquid leakage in liquid delivery pipelines. However, existing liquid leakage detectors are usually in rope shape, which are formed by wrapping a braided rope outside a wire, then wrapping multiple wires with the braided rope, and finally winding or bundling them at the position to be detected to monitor whether leakage occurs. However, since each wire and the whole body composed of multiple wires need to be wrapped with a braided wire, the size of the liquid leakage detection sensor of this structure becomes larger, thereby limiting its application range. Utility Model Content

[0005] In view of the above problems, the purpose of the utility model is to provide a liquid leakage detection sensor, which can effectively improve its applicability.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A liquid leakage detection sensor comprises: a liquid leakage detection FPC and a braided mesh tube, wherein the liquid leakage detection FPC is inserted into the braided mesh tube, the liquid leakage detection FPC comprises a substrate and a first wire and a second wire arranged on the substrate, wherein the first wire and the second wire are arranged at intervals.

[0008] In some technical solutions, the liquid leakage detection FPC is a double-sided electrode printed FPC, and the first wire and the second wire are respectively provided on both sides of the substrate of the double-sided electrode printed FPC.

[0009] In some technical solutions, the braided mesh tube is a radially retractable braided mesh tube, and the braided mesh tube clamps the leakage detection FPC through its contraction and deformation.

[0010] In some technical solutions, the braided mesh tube is a PET braided mesh tube.

[0011] In some technical solutions, one end or both ends of the leakage detection FPC are provided with an FPC connector.

[0012] In some technical solutions, a gold finger cable is provided on the FPC connector.

[0013] In some technical solutions, a widened portion is provided at a preset section of the base.

[0014] In some technical solutions, the end of the braided mesh tube is provided with a necking.

[0015] In some technical solutions, a third wire and a fourth wire are further provided on the substrate, the third wire is located on a side of the first wire away from the second wire, and the fourth wire is located on a side of the second wire away from the first wire, and the third wire and the fourth wire are used to detect whether the first wire and the second wire are broken.

[0016] In some technical schemes, a plurality of first detection pieces are provided on the side of the first wire facing the second wire, and the plurality of first detection pieces extend along the length direction of the first wire; a plurality of second detection pieces are provided on the side of the second wire facing the first wire, and the plurality of second detection pieces extend along the length direction of the second wire, and the first detection pieces and the second detection pieces are staggered and spaced apart.

[0017] Compared with the prior art, the above technical solution has the following advantages:

[0018] The utility model provides a liquid leakage detection sensor, comprising: a liquid leakage detection FPC and a braided mesh tube, wherein the liquid leakage detection FPC is inserted into the braided mesh tube, wherein the liquid leakage detection FPC comprises a substrate and a first wire and a second wire arranged on the substrate, and the first wire and the second wire are arranged at intervals. By selecting the liquid leakage detection FPC, it is not necessary to wrap the braided rope outside the first wire and the second wire, and it is only necessary to arrange the braided mesh tube outside the liquid leakage detection FPC, so the cross-sectional area of ​​the liquid leakage detection sensor can be reduced, which is conducive to its miniaturization, and the liquid leakage detection FPC is a strip structure, and its thickness is relatively thinner than the wire wrapped with the braided rope, so it is easy to be wound on the liquid delivery pipeline that needs to be leaked, so its applicability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1A schematic diagram of the structure of a liquid leakage detection sensor provided by a specific implementation mode of the utility model;

[0021] Figure 2 A schematic diagram of the structure of a cross section of a liquid leakage detection sensor provided by a specific embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the structure of the front side of a liquid leakage detection FPC of a liquid leakage detection sensor provided by a specific embodiment of the utility model;

[0023] Figure 4 A structural schematic diagram of the back side of a liquid leakage detection FPC of a liquid leakage detection sensor provided by a specific embodiment of the utility model;

[0024] Figure 5 The present invention is a schematic structural diagram of a liquid leakage detection sensor provided in another specific implementation manner of the present invention.

[0025] The reference numerals are as follows:

[0026] 10-leakage detection FPC, 11-substrate, 111-through hole, 112-widening portion, 12-first wire, 121-first detection sheet, 13-second wire, 131-second detection sheet, 14-third wire, 15-fourth wire, 16-FPC connector, 17-gold finger cable;

[0027] 20- Braided mesh tube. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Please refer to Figure 1~Figure 5A liquid leakage detection sensor provided by an embodiment of the utility model includes: a liquid leakage detection FPC10 (English name Flexible Printed Circuit Board, abbreviated as FPC, Chinese name flexible circuit board) and a braided mesh tube 20. The liquid leakage detection FPC10 is inserted into the braided mesh tube 20. Through the braided mesh tube 20, on the one hand, the liquid leakage detection FPC10 can be protected, and the braided mesh tube 20 has a certain insulation effect, which can avoid the problem of false alarm caused by direct contact between the liquid leakage detection FPC10 and metal. On the other hand, it can make the leakage penetrate into the inside of the braided mesh tube 20 from the outside. In addition, it also has a certain liquid absorption performance, wherein the liquid leakage detection FPC10 includes a substrate 11 and a first wire 12 and a second wire 13 arranged on the substrate 11, the first wire 12 and the second wire 13 are arranged at intervals, and the first wire 12 and the second wire 13 are printed on the surface of the substrate 11. By selecting the liquid leakage detection FPC10, there is no need to wrap the braided rope outside the first wire 12 and the second wire 13. It is only necessary to install the braided mesh tube 20 outside the liquid leakage detection FPC10. Therefore, the cross-sectional area of ​​the liquid leakage detection sensor can be reduced, which is conducive to its miniaturization. Moreover, the liquid leakage detection FPC10 is a strip structure, and its thickness is thinner than that of the wire wrapped with the braided rope, so it is easy to be wound on the liquid delivery pipeline that needs to be detected for liquid leakage, so its applicability can be improved.

[0030] When in use, the leakage detector sensor is connected to the collector. When liquid leaks, the leaked liquid will penetrate into the inside of the braided mesh tube 20 from the outside. When the leaked liquid contacts the first wire 12 and the second wire 13 at the same time, the first wire 12 and the second wire 13 are connected. After the collector detects the resistance change, it will issue an alarm so that the staff can perform maintenance in time to prevent the liquid from continuing to leak.

[0031] In some embodiments, the liquid leakage detection FPC 10 is a double-sided electrode printed FPC, and a first wire 12 and a second wire 13 are respectively provided on both sides of the substrate 11 of the double-sided electrode printed FPC. Specifically, a first wire 12 and a second wire 13 can be printed on both sides of the substrate 11, that is, the two sides of the double-sided electrode printed FPC can be used for liquid leakage detection, thereby improving the detection range of the liquid leakage detection sensor, and further improving the reliability of liquid leakage detection. In addition, a third wire 14 and a fourth wire 15 are also provided on the substrate 11, wherein a third wire 14 and a fourth wire 15 can be printed on both sides of the substrate 11, that is, a group of first wires 12, second wires 13, third wires 14 and fourth wires 15 are printed on both sides of the substrate 11. In addition, in order to facilitate the connection of the wires on both sides of the substrate 11 to achieve a parallel or series relationship, a through hole 111 can be provided on the substrate 11, and the number of through holes 111 can be one or more. For one side of the substrate 11, the third wire 14 is located on the side of the first wire 12 away from the second wire 13, and the fourth wire 15 is located on the side of the second wire 13 away from the first wire 12. The third wire 14 and the fourth wire 15 are used to detect whether the first wire 12 and the second wire 13 are broken. When the leakage detection sensor is broken, it usually starts to break from one side or both sides start to break at the same time. Therefore, the third wire 14 and / or the fourth wire 15 will break first. When the third wire 14 or the fourth wire 15 is broken, it means that the leakage detector is broken and cannot perform accurate leakage detection, and it needs to be maintained. By detecting whether the first wire 12 and the second wire 13 are broken, when the first wire 12 or the second wire 13 is broken, it can be collected by the collector, and then the collector sends a disconnection warning signal, so the problem of not being able to detect leakage due to disconnection can be avoided, thereby improving the reliability of leakage detection.

[0032] In some embodiments, the braided mesh tube 20 is a radially retractable braided mesh tube 20, and the braided mesh tube 20 clamps the leakage detection FPC 10 through its contraction deformation to limit the relative positions of the leakage detection FPC 10 and the braided mesh tube 20. Specifically, before the braided mesh tube 20 is sleeved on the leakage detection FPC 10, its structure is an oblate cylindrical or cylindrical structure. When it is an oblate cylindrical structure, during assembly, the width direction of the leakage detection FPC 10 is aligned with the long diameter direction of the oblate cylindrical shape, which makes it convenient for the braided mesh tube 20 to be sleeved on the leakage detection FPC 10. On the liquid leakage detection FPC10, when the braided mesh tube 20 is in a cylindrical structure, the inner diameter of the braided mesh tube 20 is smaller than the width of the liquid leakage detection FPC10. When inserting, one end of the liquid leakage detection FPC10 is inserted from one end of the braided mesh tube 20, and the braided mesh tube 20 is stretched until one end of the liquid leakage detection FPC10 passes through the braided mesh tube 20. At this time, the cross-section of the braided mesh tube 20 is elliptical or runway-shaped. The liquid leakage detection FPC10 can be clamped in the braided mesh tube 20 through the shrinkage and deformation of the braided mesh tube 20.

[0033] In some embodiments, the braided mesh tube 20 is a PET (Polyethylene terephthalate, PET for short, and polyethylene terephthalate, commonly known as polyester resin) braided mesh tube 20, wherein the braided mesh tube 20 is braided from PET fibers. It should be noted that PET is only a preferred material for the braided mesh tube 20, and other insulating materials can also be used to make the braided mesh tube 20.

[0034] In some embodiments, an FPC connector 16 is provided at one or both ends of the leakage detection FPC 10. When an FPC connector 16 is provided at one end of the leakage detection FPC 10, the FPC connector 16 can be connected to a collector. When FPC connectors 16 are provided at both ends of the leakage detection FPC 10, one of the FPC connectors 16 can be connected to the FPC connector 16 of the other leakage detection FPC 10, and the other FPC connector 16 can be connected to a collector. The width of the FPC connector 16 can be smaller than the width of the leakage detection FPC 10, or larger than the width of the leakage detection FPC 10, or equal to the width of the leakage detection FPC 10. Figure 5 In order to facilitate the connection of the leakage detection FPC 10, a gold finger cable 17 is provided on the FPC connector 16, and specifically, a 6-pin gold finger with a spacing of 0.5 mm can be selected for signal output.

[0035] In some embodiments, Figure 5As shown, a widened portion 112 is provided at a preset section of the base 11, wherein a plurality of widened portions 112 can be provided in the length direction of the base 11, and the braided mesh tube 20 can be supported by the widened portion 112, thereby improving the stability of the leakage detection FPC 10 inserted in the braided mesh tube 20, so as to prevent the braided mesh tube 20 from falling off from the leakage detection FPC 10.

[0036] In some embodiments, the length of the braided mesh tube 20 is not less than the length of the leakage detection FPC 10, and the FPC connector 16 extends out of the end of the braided mesh tube 20 to facilitate the connection of the FPC connector 16. Further, in order to ensure the stability of the leakage detection FPC 10 passing through the braided mesh tube 20, a constriction is provided at the end of the braided mesh tube 20. Since the width of the FPC connector 16 is less than the width of the leakage detection FPC 10, there is a step surface at the intersection of the two. Therefore, the constriction can make the end of the braided sleeve clamped at the step surface, thereby preventing the leakage detection FPC 10 from escaping from the braided mesh tube 20.

[0037] In some embodiments, Figure 3 and Figure 4 As shown, a plurality of first detection pieces 121 are provided on one side of the first wire 12 facing the second wire 13, and the plurality of first detection pieces 121 extend along the length direction of the first wire 12; a plurality of second detection pieces 131 are provided on one side of the second wire 13 facing the first wire 12, and the plurality of second detection pieces 131 extend along the length direction of the second wire 13, and the first detection pieces 121 and the second detection pieces 131 are staggered and distributed at intervals. When the leaking liquid contacts the first detection piece 121 and the second detection piece 131 at the same time, the first wire 12 and the second wire 13 are connected, and the collector can collect the leakage.

[0038] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0039] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0040] The above is a detailed introduction to a liquid leakage detection sensor provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A liquid leakage detection sensor, characterized in that: include: A liquid leakage detection FPC (10) and a braided mesh tube (20), wherein the liquid leakage detection FPC (10) is inserted into the braided mesh tube (20), and the liquid leakage detection FPC (10) comprises a base body (11) and a first wire (12) and a second wire (13) arranged on the base body (11), wherein the first wire (12) and the second wire (13) are arranged at intervals.

2. The liquid leakage detection sensor according to claim 1, characterized in that: The liquid leakage detection FPC (10) is a double-sided electrode printed FPC, and the first conductive wire (12) and the second conductive wire (13) are respectively provided on the two sides of the substrate (11) of the double-sided electrode printed FPC.

3. The liquid leakage detection sensor according to claim 2, characterized in that: The braided mesh tube (20) is a radially retractable braided mesh tube (20), and the braided mesh tube (20) clamps the liquid leakage detection FPC (10) through its contraction and deformation.

4. The liquid leakage detection sensor according to claim 3, characterized in that: The braided mesh tube (20) is a PET braided mesh tube (20).

5. The liquid leakage detection sensor according to claim 1, characterized in that: One end or both ends of the liquid leakage detection FPC (10) are provided with an FPC connector (16).

6. The liquid leakage detection sensor according to claim 5, characterized in that: The FPC connector (16) is provided with a gold finger cable (17).

7. The liquid leakage detection sensor according to claim 1, characterized in that: A widened portion (112) is provided at a preset section of the base body (11).

8. The liquid leakage detection sensor according to claim 1, characterized in that: The end of the braided mesh tube (20) is provided with a necking opening.

9. The liquid leakage detection sensor according to claim 1, characterized in that: A third wire (14) and a fourth wire (15) are also provided on the substrate (11); the third wire (14) is located on a side of the first wire (12) away from the second wire (13); the fourth wire (15) is located on a side of the second wire (13) away from the first wire (12); the third wire and the fourth wire (15) are used to detect whether the first wire and the second wire (13) are broken.

10. The liquid leakage detection sensor according to any one of claims 1 to 9, characterized in that: A plurality of first detection pieces (121) are provided on a side of the first conductive line (12) facing the second conductive line (13), and the plurality of first detection pieces (121) extend along the length direction of the first conductive line (12); a plurality of second detection pieces (131) are provided on a side of the second conductive line (13) facing the first conductive line (12), and the plurality of second detection pieces (131) extend along the length direction of the second conductive line (13), and the first detection pieces (121) and the second detection pieces (131) are staggered and spaced apart.

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