WO2019109287A1

WO2019109287A1 - Watertightness test device

Info

Publication number: WO2019109287A1
Application number: PCT/CN2017/114937
Authority: WO
Inventors: 吴加富; 缪磊; 陈冉; 马伟; 黎宗彩
Original assignee: 苏州富强科技有限公司
Priority date: 2017-12-07
Filing date: 2017-12-07
Publication date: 2019-06-13
Also published as: CN110291374B; CN110291374A

Abstract

A watertightness test device (1) comprises: a water storage container (11), comprising a water storage tank (111) and an air inlet pipe (112) and a water outlet pipe (113) respectively communicating with top and bottom portions of the water storage tank (111); a glass capillary tube (122) with closed upper and lower ends; and a liquid level detection assembly (13), used for detecting a change of a liquid level in the glass capillary tube (122) and provided beside the glass capillary tube (122). The air inlet pipe (112) communicates with the atmosphere. A first pneumatic valve (114) is provided on the water outlet pipe (113). A first water outlet branch (1131) and a second water outlet branch (1132) are provided at the end of the water outlet pipe (113). The end of the first water outlet branch (1131) communicates with a product to be tested (2). The second water outlet branch (1132) is connected to a bottom portion of the glass capillary tube (122). A change of the liquid level in the glass capillary tube (122) before and after a watertightness test is monitored, and the amount of liquid leaked from a tested product during the test can be derived, thereby determining a water tightness level of the tested product. The invention simplifies a structure of a test device, greatly improves test accuracy, and has broad production and application prospects.

Description

Watertightness test device

Technical field

The invention relates to the field of watertightness testing, and in particular to a watertightness testing device.

Background technique

In the prior art, the watertightness test generally uses the test liquid weight change in the test product before and after the test to judge whether the test product has leakage and the degree of leakage, thereby judging the watertightness level of the test product, but the conventional test method has some Problem: Because the test liquid remains inside the test product, the test error is large; because the accuracy of the weighing is low, the final watertightness level judgment accuracy is low; the weighing test step is cumbersome, resulting in low test efficiency.

In view of this, it is necessary to develop a watertightness test device to solve the above problems.

Summary of the invention

In view of the deficiencies in the prior art, an object of the present invention is to provide a watertightness testing device which can convert a test product in a test process only by monitoring a liquid level change in a glass tube before and after a watertightness test. The specific leakage of the liquid in the test, thereby judging the watertightness level of the test product, simplifies the structure of the test device and greatly improves the test accuracy and test efficiency, and has a wide production and application prospect.

In order to achieve the above object and other advantages in accordance with the present invention, a watertightness testing apparatus is provided, comprising:

a water storage container comprising a sealed water storage tank body having a certain internal space and an intake pipe and an outlet pipe respectively communicating with the top and bottom of the water storage tank body;

a capillary glass tube sealed at both upper and lower ends;

a liquid level test assembly for testing the change in the liquid level in the capillary glass tube, which is disposed on the side of the capillary glass tube.

Wherein, the intake pipe is connected to the atmosphere, and the first gas control valve is arranged on the outlet pipe, and the end branch of the outlet pipe is the first water outlet branch and the second water outlet branch, and the end of the first water outlet branch is connected with the product to be tested. The second outlet branch leads to the bottom of the capillary tube.

Preferably, the capillary glass tube has an inner diameter of 0.1 mm to 10 mm.

Preferably, the capillary glass tube has an inner diameter of 0.5 mm.

Preferably, the top of the capillary glass tube is connected to a pressurizing tube, and the end of the pressurized tube branches into a first pressurizing branch and a second pressurizing branch.

Preferably, the first pressurized branch is provided with a first fluid valve, and the second pressurized branch is provided with a second fluid valve.

Preferably, the end of the second pressurized branch is connected to a source of gas.

Preferably, the product to be tested is connected to an overflow component, and the overflow component comprises:

An overflow pipe connected to the product to be tested;

a second gas control valve and a liquid recovery tank disposed on the overflow pipe and arranged in the liquid flow direction.

Preferably, the level test assembly comprises:

Installation platform;

a CCD photographing mechanism provided on the mounting platform,

Wherein, a compensation light source is arranged between the CCD photographing mechanism and the capillary glass tube.

Compared with the prior art, the invention has the beneficial effects that only by monitoring the liquid level change in the glass tube before and after the water tightness test, it is possible to convert the volume of the liquid leaked by the test product during the test, thereby testing The product's judgment of watertightness level simplifies the structure of the test device and greatly improves the test accuracy and test efficiency, and has a wide production and application prospect.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a three-dimensional structural view of a watertightness testing apparatus according to the present invention.

Detailed ways

The above and other objects, features, aspects and advantages of the present invention will become more apparent from In the figures, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to refer to the same or. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the size from top to bottom, "width" corresponds to the size from left to right, and "depth" corresponds to the size from front to back. These relative terms are for convenience of description and are generally not intended to require a particular orientation. Terms relating to attachment, coupling, etc. (eg, "connected" and "attached") refer to a relationship in which the structures are directly or indirectly fixed or attached to each other through an intermediate structure, and a movable or rigid attachment or relationship, unless Other ways are clearly stated.

Referring to Figure 1, the watertightness testing apparatus 1 includes:

The water storage container 11 includes a sealed water storage tank body 111 having a certain internal space and an intake pipe 112 and an outlet pipe 113 respectively communicating with the top and bottom of the water storage tank body 111;

a capillary glass tube 122 sealed at both upper and lower ends;

a liquid level test assembly 13 for testing the change in the liquid level in the capillary glass tube 122, which is disposed on the side of the capillary glass tube 122.

The air inlet pipe 112 is connected to the atmosphere, and the first air control valve 114 is disposed on the water outlet pipe 113. The end of the water outlet pipe 113 branches into a first water outlet branch 1131 and a second water outlet branch 1132, and the first water outlet branch 1131 The end of the product is connected to the product to be tested 2, and the second outlet branch 1132 leads to the bottom of the capillary tube 122. The watertightness testing device 1 only needs to monitor the liquid level change in the glass tube before and after the watertightness test, and can convert the volume of the liquid leaked by the test product during the test, thereby judging the watertightness level of the test product. It simplifies the structure of the test device and greatly improves the test accuracy and test efficiency, and has a wide production and application prospect.

Further, the capillary glass tube 122 has an inner diameter of 0.1 mm to 1 mm. In one embodiment, the inner diameter of the capillary glass tube 122 is 0.1 mm; in another embodiment, the inner diameter of the capillary glass tube 122 is 10 mm; in a preferred embodiment, the inner diameter of the capillary glass tube 122 is 0.5 mm.

Referring again to FIG. 1, the top of the capillary glass tube 122 is connected to a pressurizing tube 123, and the end of the pressurizing tube 123 branches into a first pressurizing branch 1231 and a second pressurizing branch 1232.

Further, a first fluid valve 124 is disposed on the first pressurizing branch 1231, and a second fluid valve 125 is disposed on the second pressurizing branch 1232.

Further, a gas source 126 is connected to the end of the second pressurized branch 1232.

Further, the product to be tested 2 is connected to the overflow assembly 14, and the overflow assembly 14 includes:

An overflow pipe 141 communicating with the product 2 to be tested;

A second pneumatic control valve 142 and a liquid recovery tank 143 are disposed on the overflow pipe 141 and are sequentially disposed in the liquid flow direction.

Referring again to Figure 1, the level test assembly 13 includes:

Mounting platform 131;

a CCD photographing mechanism 132 disposed on the mounting platform 131,

A compensation light source 133 is disposed between the CCD photographing mechanism 132 and the capillary glass tube 122.

Test steps:

S1, the first air control valve 114, the second air control valve 142, the first fluid valve 124 and the second fluid valve 125 are closed, and a certain amount of test liquid is injected into the water storage tank body 111, and the test liquid can be distilled water or pure. Other liquids such as water that do not corrode the product to be tested;

S2, the first air control valve 114 and the second air control valve 142 are opened, the first fluid valve 124 and the second fluid valve 125 are closed, and a certain amount of air pressure is added to the water storage tank body 111 through the air inlet pipe 112 to test the liquid. The product to be tested is pressed against the product to be tested through the outlet pipe 113 and the first outlet branch 1131, so that the test liquid is filled with the product 2 to be tested, and when the test liquid in the product to be tested 2 overflows into the liquid recovery tank 143, the second air control is turned off. Valve 142;

S3, opening the first air control valve 114, the second fluid valve 125, closing the second air control valve 142, the first fluid valve 124, so that the test liquid in the water storage tank body 111 overflows into the capillary glass tube 122 by its own weight. And finally, the liquid level in the capillary glass tube 122 is level with the liquid surface in the water storage tank body 111, and the CCD photographing mechanism 132 monitors the liquid level state in the capillary glass tube 122 at this time, and records the liquid level at this time. The height position, the liquid level height position at this time is marked as the liquid level height 1, and the second fluid valve 125 is closed;

S4, the second fluid valve 125 is opened, the first air control valve 114, the second air control valve 142, and the first fluid valve 124 are closed, and the air source 126 starts to be pressurized and inflated into the capillary glass tube 122, and is tested by the CCD photographing mechanism 132. The liquid level in the capillary glass tube 122 changes, and the liquid level height position at this time is marked as the liquid level height 2, and the liquid level difference between the liquid level height 1 and the liquid level height 2 and the diameter of the capillary glass tube 122 are calculated. The size is converted into the volume change of the liquid during the test, and then the watertightness level of the test product is determined;

S5, opening the second air control valve 142, the second fluid valve 125, closing the first fluid valve 124, the first air control valve 114, and the air source 126 is pressurized again to press the test liquid in the capillary glass tube 122 together with the second water outlet The test liquid in the road 1132, the first water outlet branch 1131, and the test product 2 is pressed back into the liquid recovery tank 143, and the test is completed.

The number of devices and processing scales described herein are intended to simplify the description of the present invention. Applicability, modifications, and variations of the present invention will be apparent to those skilled in the art.

Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the embodiments, and are fully applicable to various fields suitable for the present invention, and can be easily made by those skilled in the art. The invention is not limited to the specific details and the details shown and described herein, without departing from the scope of the appended claims.

Claims

A watertightness testing device (1), comprising:

a water storage container (11) comprising a sealed water storage tank body (111) having a certain internal space and an intake pipe (112) and an outlet water pipe (113) respectively communicating with the top and bottom of the water storage tank body (111);

a capillary glass tube (122) sealed at both upper and lower ends;

a liquid level test assembly (13) for testing the change in the liquid level in the capillary glass tube (122), which is disposed on the side of the capillary glass tube (122).

Wherein, the intake pipe (112) is open to the atmosphere, and the outlet pipe (113) is provided with a first air control valve (114), and the end of the outlet pipe (113) branches into a first water outlet branch (1131) and a second water outlet branch. Road (1132), the end of the first outlet branch (1131) is connected to the product to be tested (2), and the second outlet branch (1132) is connected to the bottom of the capillary tube (122).
The watertightness test apparatus (1) according to claim 1, wherein the capillary glass tube (122) has an inner diameter of 0.1 mm to 10 mm.
The watertightness test apparatus (1) according to claim 2, wherein the capillary glass tube (122) has an inner diameter of 0.5 mm.
The watertightness testing device (1) according to claim 1, wherein the top of the capillary glass tube (122) is connected to a pressurizing tube (123), and the end of the pressing tube (123) branches into a first pressurization. Branch (1231) and second pressurized branch (1232).
The watertightness testing device (1) according to claim 4, wherein the first pressurizing branch (1231) is provided with a first fluid valve (124), and the second pressurizing branch (1232) is provided. There is a second fluid valve (125).
The watertightness testing device (1) according to claim 5, characterized in that the end of the second pressurizing branch (1232) is connected to a gas source (126).
The watertightness testing device (1) according to claim 1, wherein the product to be tested (2) is connected to an overflow assembly (14), the overflow assembly (14) comprising:

An overflow pipe (141) connected to the product to be tested (2);

a second pneumatic control valve (142) and a liquid recovery tank (143) disposed on the overflow pipe (141) and arranged in the liquid flow direction.
The watertightness test apparatus (1) according to claim 1, wherein the liquid level test assembly (13) comprises:

Installation platform (131);

a CCD photographing mechanism (132) disposed on the mounting platform (131),

A compensation light source (133) is disposed between the CCD photographing mechanism (132) and the capillary glass tube (122).