CN216770933U

CN216770933U - High-sensitivity water leakage sensor of watertight cabin

Info

Publication number: CN216770933U
Application number: CN202220112554.0U
Authority: CN
Inventors: 陶光勇; 刘湘俊; 曾超; 唐校兵; 吴少柏
Original assignee: Changsha Branch Of China Science Great Wall Ocean Information System Co ltd
Current assignee: Changsha Branch Of China Science Great Wall Ocean Information System Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-06-17
Anticipated expiration: 2032-01-17

Abstract

The utility model relates to a high-sensitivity water leakage sensor of a watertight cabin body, which comprises a first electrode and a second electrode which are annularly surrounded, a porous elastic object and a water leakage detection circuit, wherein the first electrode and the second electrode are packaged on a flexible circuit board; the porous elastic body is used for collecting water and has insulation, and the water leakage detection circuit is connected with the first electrode welding area and the second electrode welding area. The utility model can effectively solve the problem of insufficient sensitivity of the water leakage sensor and improve the water leakage monitoring capability of the underwater equipment.

Description

High-sensitivity water leakage sensor for watertight cabin

Technical Field

The utility model relates to the technical field of water leakage monitoring, in particular to a high-sensitivity water leakage sensor of a watertight cabin body.

Background

The internal electrical equipment of the watertight cabin body is arranged in the watertight cabin body, so that the electrical equipment is ensured to work in a sealed and dry environment. Once the watertight cabin body leaks water, the electrical equipment can not work normally, and in severe cases, the electrical equipment can be burnt out, and the underwater equipment loses functions. Therefore, the underwater equipment is generally designed with a water leakage sensor for monitoring whether the sealed cabin leaks water so as to take relevant measures in time. The conventional water leakage sensor adopts a pair of electrodes which are mutually crossed, when water (seawater) exists between the electrodes, the resistance between the electrode pair is reduced, and a water leakage signal is triggered; however, the sensitivity of the water leakage sensor is not enough due to the design and the installation mode of the water leakage sensor, and when water leakage is detected, water is accumulated in the watertight cabin seriously, so that the water leakage monitoring function cannot be well realized.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Based on the problems, the utility model provides the high-sensitivity water leakage sensor of the watertight cabin body, which is used for solving the problem of insufficient sensitivity of the water leakage sensor and improving the water leakage monitoring capability of underwater equipment.

(II) technical scheme

Based on the technical problem, the utility model provides a high-sensitivity water leakage sensor of a watertight cabin body, which comprises a first electrode and a second electrode which are annularly surrounded, a porous elastic object and a water leakage detection circuit, wherein the first electrode and the second electrode are packaged on a flexible circuit board; the porous elastic body is used for collecting water and has insulation, and the water leakage detection circuit is connected with the first electrode welding area and the second electrode welding area.

Furthermore, the first electrode and the second electrode are both copper foil electrodes.

Furthermore, the back surface of the flexible circuit board is a back adhesive layer, and a base material-free acrylic pressure-sensitive back adhesive is adhered.

Further, the substrate-free acrylic pressure-sensitive back adhesive is a VHB adhesive.

Further, the porous elastic material comprises foamed cotton.

Further, the watertight cabin body comprises a watertight cylinder body and a watertight end cover, the water leakage detection circuit is placed in the watertight cylinder body, the flexible circuit board of the water leakage sensor is fixed at the bottom of a circle of sinking platform on the surface of the watertight cylinder body, which is in contact with the watertight end cover, and the sinking platform is annularly surrounded by a groove of the mounting sealing ring.

Further, the height of the sink ensures that the porous elastic is in contact with the watertight end cap and compresses.

(III) advantageous effects

The technical scheme of the utility model has the following advantages:

(1) according to the utility model, the porous elastic object is used for enhancing the insulativity of the electrode pair, and the water absorption of the electrode pair is used for enhancing the sensitivity of monitoring water leakage, and the annular structure of the electrode pair and the covering relation of the porous elastic object can enable any one part to leak water, so that the annular electrode can be conducted, and the sensitivity of the water leakage sensor is further improved;

(2) the water leakage sensor is fixed at the bottom of a circle of sinking platform which is contacted with the watertight end cover and is annularly surrounded by the groove of the O-shaped ring, and the height of the sinking platform can ensure that the porous elastic object on the upper surface of the water leakage sensor and the watertight end cover are properly compressed, so that water can be effectively prevented from flowing away from a gap between the porous elastic object and the watertight end cover, water leakage occurs at any position of the O-shaped ring, the water can flow through the porous elastic object on the upper surface of the water leakage sensor to be absorbed, and the accuracy of water leakage monitoring is ensured.

Drawings

The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the utility model in any way, and in which:

fig. 1 is a schematic structural diagram of a high-sensitivity water leakage sensor according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view D-D of FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the high-sensitivity water leakage sensor of the embodiment of the present invention installed in a watertight compartment;

FIG. 5 is an enlarged view of a portion of FIG. 4 in accordance with an embodiment of the present invention;

in the figure: 1: a first electrode; 2: a second electrode; 3: a welding area of the electrode; 4: a second electrode welding area; 5: a water collection tank; 6: a porous elastic article; 7: a solder resist layer of the flexible circuit board; 8: a flexible circuit board substrate layer; 9: a back adhesive layer; 10: sinking a platform; 11: an O-shaped ring; 12: a watertight barrel; 13: a watertight end cap.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

As shown in fig. 1, 2 and 3, the high-sensitivity water leakage sensor of the present invention comprises a first electrode 1 and a second electrode 2 which are annularly surrounded, a porous elastic object 6 and a water leakage detection circuit, wherein the first electrode 1 and the second electrode 2 are packaged on a flexible circuit board, as shown in a cross-sectional view D-D of fig. 3, the bottoms of the first electrode 1 and the second electrode 2 are flexible circuit board base layers 8, the exterior is surrounded by a flexible circuit board layer 7, the middle is separated by a water collection tank 5, and the surface is covered by the porous elastic object 6; the porous elastic material 6 is used for collecting moisture and enhancing insulation, and includes but is not limited to foam cotton; the water leakage detection circuit connects the first electrode land 3 and the second electrode land 4 as shown in the enlarged view of fig. 2. The back surface of the flexible circuit board is a back adhesive layer 9, the back adhesive layer 9 is a base material-free acrylic pressure-sensitive back adhesive, including but not limited to VHB adhesive, for fixing a water leakage sensor. The first electrode 1 and the second electrode 2 are both copper foil electrodes. The working principle of the sensor is that when water exists in the water collecting tank 5 due to the water absorption of the porous elastic object 6, the first electrode 1 and the second electrode 2 are conducted.

When the sensor is used for a watertight cabin, the watertight cabin comprises a watertight cylinder body 12 and a watertight end cover 13, the section view of the watertight cabin is shown in fig. 4 and fig. 5, a circle of groove is arranged on the contact surface of the watertight cylinder body 12 and the watertight end cover 13 for installing an O-shaped ring 11 to ensure sealing, a circle of sinking platform 10 is annularly enclosed inside the groove for installing the O-shaped ring 11, a back glue layer 9 of the flexible circuit board is pasted at the bottom of the sinking platform 10, the water leakage detection circuit is arranged in the watertight cylinder body 12, the height of the sinking platform 10 can ensure that the porous elastic object 6 on the upper surface of the water leakage sensor is contacted with the watertight end cover 13 and is properly compressed, the proper compression is to avoid that a gap is left between the porous elastic object 6 and the watertight end cover 13 to enable water to flow away from the gap and not to be absorbed into the porous elastic object 6 and the water collecting tank 5, namely, the water can be fully absorbed by the porous elastic object 6, the monitoring accuracy is ensured. Therefore, when water leakage occurs at any position of the O-shaped ring 11, the water can flow through the porous elastic body 6 on the upper surface of the water leakage sensor; after the porous elastic body 6 absorbs water, water can leak into the water collecting tank 5, so that the copper foil electrode pair is conducted to generate a short-circuit signal, the short-circuit signal is transmitted to the water leakage detection circuit through a lead, the water collecting tank 5 is conducted during water leakage, the resistance value between the two electrodes can be changed from high to low, whether water leakage occurs or not is sensed by using the change of the resistance value, high-sensitivity water leakage monitoring is further realized, the bridge circuit is a circuit for measuring the resistance by using a comparison method, the bridge circuit has excellent characteristics in the aspect of detecting the resistance, and the water leakage detection circuit can be manufactured based on the bridge circuit.

In summary, the high-sensitivity water leakage sensor of the watertight cabin has the following advantages:

(1) according to the utility model, the porous elastic object is used for enhancing the insulativity of the electrode pair, the water absorption of the electrode pair is also used for enhancing the sensitivity of monitoring water leakage, and the annular structure of the electrode pair and the covering relation of the porous elastic object can ensure that any part leaks water, so that the annular electrode can be conducted, and the sensitivity of the water leakage sensor is further improved;

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A high-sensitivity water leakage sensor of a watertight cabin body is characterized by comprising a first electrode, a second electrode, a porous elastic object and a water leakage detection circuit which are annularly surrounded, wherein the first electrode and the second electrode are packaged on a flexible circuit board; the porous elastic body is used for collecting water and has insulation, and the water leakage detection circuit is connected with the first electrode welding area and the second electrode welding area.

2. The watertight compartment high-sensitivity water leakage sensor according to claim 1, wherein the first electrode and the second electrode are both copper foil electrodes.

3. The watertight compartment high-sensitivity water leakage sensor according to claim 1, wherein the back surface of the flexible circuit board is a back adhesive layer to which a substrate-free acrylic pressure-sensitive back adhesive is adhered.

4. The watertight compartment high-sensitivity water leakage sensor according to claim 3, wherein the substrate-free acrylic pressure sensitive adhesive is VHB adhesive.

5. The watertight compartment high-sensitivity water leakage sensor according to claim 1, wherein the porous elastomer comprises foamed cotton.

6. The watertight compartment high-sensitivity water leakage sensor according to claim 1, wherein the watertight compartment comprises a watertight cylinder and a watertight end cap, the water leakage detection circuit is disposed in the watertight cylinder, the flexible circuit board of the water leakage sensor is fixed to the bottom of a ring of sunken platforms on the surface of the watertight cylinder, which is in contact with the watertight end cap, and the sunken platforms are annularly surrounded by the grooves on which the sealing rings are mounted.

7. The watertight compartment high sensitivity water leak sensor of claim 6, wherein the height of the sinker ensures that the porous elastomer contacts and compresses the watertight end cap.