CN212649878U

CN212649878U - Device for preventing equipment from water inflow

Info

Publication number: CN212649878U
Application number: CN202021582840.0U
Authority: CN
Inventors: 王险峰; 崔磊; 江友志
Original assignee: Suzhou Swift Hi Tech Information And Technology Co ltd
Current assignee: Suzhou Swift Hi Tech Information And Technology Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-03-02
Anticipated expiration: 2030-08-03

Abstract

The application discloses a device for preventing equipment from water inflow, which comprises a first hole and a second hole, wherein the first hole and the second hole are arranged on an equipment shell, the first hole is positioned on the upper part of the side surface of the equipment shell, the first hole is inclined downwards from inside to outside, and the second hole is positioned on the bottom surface of the equipment shell; the first hole and the second hole and the inner cavity of the equipment shell form an airflow channel; the waterproof structure can prevent equipment from water inlet through a simple, convenient and reasonable structure, reduces the grade requirements of various connectors, avoids the failure phenomenon caused by aging of common sealant, improves the waterproof effect, and prolongs the effective time limit of the waterproof structure.

Description

Device for preventing equipment from water inflow

Technical Field

The application relates to the technical field of equipment waterproofing, especially, relate to a device for preventing equipment from intaking.

Background

At present, a plurality of devices need to prevent water from entering, 8 grades are specified in China in the aspect of water resistance, the grades are IP 60-IP 68, and the 9 grades are simply described as follows: level 0, no protection; level 1, the harmful effect of vertically falling water drops can be eliminated; 2, the water drops falling within 15 degrees from the vertical direction are protected; level 3, the harmful effect of the spray-shaped water drops at 60 degrees from the vertical direction can be eliminated; 4, the harmful effect of splashing water drops from different directions can be eliminated; 5, the harmful influence on the water flow sprayed by the nozzles in all directions can be eliminated; 6, the harmful effect on the strong jet water flow of the nozzles in all directions can be eliminated; 7-grade, the top is 0.15-1 meter away from the water surface, the operation lasts for 30 minutes, the performance is not affected, and the water cannot leak; level 8, the top is 1.5-30 meters away from the water surface, the operation lasts for 30 minutes, the performance is not affected, and the water cannot leak; it can be seen that a relatively sealed environment is required since class 4, and that for classes 7 and 8, external water pressure issues are more of a concern, and thus, water ingress control is more difficult.

However, in the prior art, most of the devices are sealed thoroughly in the waterproof aspect, and in some devices which can be sealed and can resist pressure, there is certainly no problem, and many devices are difficult to seal actually, for example, a unit such as a circuit board of the device needs to be sealed, but a power supply cable, a signal input/output line, a sensor input port and the like cannot be sealed in the unit, which requires that a connector is sealed, and even a cable is sealed, which has certain difficulty. The situation that the water resistance is easy to cause problems in the prior art is as follows: for example, a cable 201 is connected to a sealed space through a sealant 202, in this way, after several months, a crack is easily formed at the joint of the sealant 202 and the cable 201, the cracked device is immersed under water for one meter, and in deep water, a large pressure difference exists between the inside and the outside of the device, and water slowly permeates into the device. Or for example a multi-core cable core 101, the multi-strand core in the sheath of the cable core 101 does not completely occupy the space therein, but there are voids 102, and water will also permeate along the cable under a larger pressure.

SUMMERY OF THE UTILITY MODEL

The application provides a device for preventing equipment from intaking to through the pressure condition that improves waterproof construction, solve the problem of intaking of equipment.

The application provides a device for preventing equipment from water inflow, which comprises a first hole and a second hole, wherein the first hole and the second hole are arranged on an equipment shell, the first hole is positioned on the upper part of the side surface of the equipment shell, and the first hole is downwards inclined from inside to outside; the second hole is positioned on the bottom surface of the equipment shell; the first and second apertures and the interior cavity of the device housing form an airflow channel.

Aiming at the requirement of high protection grade, a hydrophobic breathable material layer is filled in the first hole, the second hole or the first hole and the second hole.

The device for preventing equipment from water inlet can achieve the following beneficial effects:

according to the device for preventing the equipment from water inflow, the two holes are formed in the equipment shell, the air flow channel is formed by the two holes and the inner cavity of the equipment shell, and due to the surface tension effect of water at the holes and the effect of reducing the humidity of the double-hole structure in the equipment shell, the equipment can be prevented from water inflow through a simple, convenient and reasonable structure, and the grade requirements of various connectors are reduced; the waterproof structure avoids the failure phenomenon caused by the aging of common sealant, improves the waterproof effect and prolongs the effective time limit of the waterproof structure.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic diagram of a multi-core cable line in the prior art.

Fig. 2 is a schematic view of a cable connected to a sealed space through a sealant according to the prior art.

Fig. 3 is a schematic structural diagram of the device for preventing water from entering the equipment.

Fig. 4 is a schematic view of the principle of resisting pressure of the hydrophobic holes of the device for preventing water from entering the equipment.

In the figure, 1 is a device shell, 2 is a first hole, and 3 is a second hole; 101 is a cable core, 102 is a gap, 201 is a cable, and 202 is sealant.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Example 1

A device for preventing water from entering equipment comprises a first hole 2 and a second hole 3 which are arranged on an equipment shell 1, wherein the first hole 2 is positioned at the upper part of the side surface of the equipment shell 1, and the first hole 2 is downwards inclined from inside to outside; the second hole 3 is positioned on the bottom surface of the device housing 1; the first hole 2 and the second hole 3 form an airflow channel with the inner cavity of the device shell 1.

The waterproof principle of the device for preventing water from entering equipment of the embodiment is shown in fig. 4, the inner wall of the container is made of hydrophobic materials, the bottom of the container is provided with small holes, when the container is filled with water, the water at the small holes forms a downward convex shape, the downward convex part of the water is subjected to upward tensile force due to the surface tension of the water, and the pressure at the small holes is obtained by dividing the tensile force by the sectional area of the small holes. The direction of the tension is indicated by the arrow in figure 4. I.e. the tension of the water is fixed, where the smaller the cross-sectional area of the pores, the greater the pressure that can be built up by the tension, i.e. the greater the pressure of the internal water that can be withstood. The two small holes of the embodiment aim to solve the moisture in the device, and the relative humidity can be used for measuring the moisture content because the water can be dissolved in the air. If only one air hole is arranged at the bottom of the equipment, the equipment is used outdoors, the high temperature and rain in the daytime are considered, the relative humidity is 100%, the humidity inside the equipment is 100% due to the air hole, and the temperature drops at night, water drops can be condensed due to over-saturation of water vapor inside the equipment, and if the hole at the bottom of the equipment is blocked by a hydrophobic material, water cannot flow out of the inside of the equipment. Assuming that the following day is sunny, the relative humidity outside the device drops to 50%, when the temperature rises in the day, the water drops in the device can be converted into water vapor again, but because the molecular weight of water molecules is 18, the oxygen is 32, the nitrogen is 28, the device is windless and the temperature is not very high, the water vapor can be gathered in the upper space inside the device, and the water vapor cannot be discharged at all. And this embodiment is opened two holes, and the aperture from above that steam can be relaxed goes out to can discharge inside steam fast, keep inside dry.

The double holes of this embodiment have the additional advantage that the ambient humidity is 100%, the internal humidity can still be relatively low, because there is no wind inside the device, the water vapor rises, when the molecules exchange inside and outside at the upper small holes, there are more water molecules in the molecules flowing out inside, and the mixture of oxygen, nitrogen and water vapor flows in outside, so the inside will be relatively dry, which is very important for protecting the device.

It should be noted that, for the waterproofing below the IP56 level, as long as the size of the opening is small enough, the wall of the device is thick enough to meet the waterproofing requirement, and it is also preferable that the included angle between the first hole 2 and the horizontal plane is greater than or equal to 10 °, and the waterproofing requirement can be further met.

At this time, the waterproof method of the device for preventing water from entering equipment of the embodiment includes the following step of setting an included angle between the first hole 2 and a horizontal plane to be greater than or equal to 10 ° so as to meet the waterproof requirement.

Example 2

The device for preventing water from entering into equipment in embodiment 1 may further comprise a hydrophobic air-permeable material layer filled in the first hole 2 and/or the second hole 3. Namely, the first hole 2, the second hole 3, or the first hole 2 and the second hole 3 are internally plugged with a hydrophobic breathable material layer.

It should be noted that, for IP67 and IP68, some hydrophobic air permeable materials are required to be filled in the first hole 2 and/or the second hole 3 as described in this embodiment.

The hydrophobic air-permeable material is, for example, a nonwoven fabric sprayed with a hydrophobic nanomaterial, and an air-permeable sponge impregnated with the hydrophobic nanomaterial is used. Wherein the hydrophobic nano material is, for example, Neverwet or the like which is a commercial product.

Namely, some hydrophobic breathable materials are filled in the first hole 2, or some hydrophobic breathable materials are filled in the second hole 3, or some hydrophobic breathable materials are filled in the first hole 2 and the second hole 3.

For example, a hydrophobic nano material is sprayed on a non-woven fabric and then is wound into a roll, and the material can be used for IP 67; the waterproofing effect of IP67 is thus easily achieved, and the longer the roll length, the greater the resistance of the hydrophobic breathable material layer to water and the better the waterproof sealing effect.

Example 3

The device for preventing water from entering into an apparatus according to embodiment 1 or embodiment 2 may further include a second hole 3 formed at a position between the middle and the edge of the bottom surface of the apparatus housing 1. I.e. the second hole 3 is not arranged in the middle of the bottom surface. Like this, can improve the inside gas circulation effect of equipment, promote inside dry, do benefit to the protective apparatus.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A device for preventing equipment from water inflow comprises a first hole and a second hole which are arranged on an equipment shell, and is characterized in that the first hole is positioned at the upper part of the side surface of the equipment shell, and the first hole is downwards inclined from inside to outside; the second hole is positioned on the bottom surface of the equipment shell; the first and second apertures and the interior cavity of the device housing form an airflow channel.

2. The apparatus for preventing water ingress of a device of claim 1 wherein said first and/or said second apertures are plugged with a layer of hydrophobic gas permeable material.

3. The device for preventing water from entering equipment as claimed in claim 2, wherein the hydrophobic air-permeable material layer is inserted into the first hole and/or the second hole in a roll form.

4. The apparatus for preventing water from entering a device of claim 1, wherein the second hole is formed at a position between the middle and the edge of the bottom surface of the device case.

5. The apparatus for preventing water ingress of a device of claim 1 wherein said first aperture is angled from horizontal by an angle greater than or equal to 10 °.