CN110291374B - Water tightness testing device - Google Patents
Water tightness testing device Download PDFInfo
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- CN110291374B CN110291374B CN201780001983.2A CN201780001983A CN110291374B CN 110291374 B CN110291374 B CN 110291374B CN 201780001983 A CN201780001983 A CN 201780001983A CN 110291374 B CN110291374 B CN 110291374B
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- glass tube
- liquid level
- capillary glass
- water outlet
- control valve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
Abstract
A water tightness testing device (1) comprising: the water storage container (11) comprises a water storage tank body (111), and an air inlet pipe (112) and an water outlet pipe (113) which are respectively communicated with the top and the bottom of the water storage tank body (111); a capillary glass tube (122) with both upper and lower ends closed; and a liquid level testing component (13) for testing liquid level change in the capillary glass tube (122), which is arranged beside the capillary glass tube (122), wherein the air inlet pipe (112) is communicated with the atmosphere, the water outlet pipe (113) is provided with a first air control valve (114), the tail end of the water outlet pipe (113) is branched into a first water outlet branch (1131) and a second water outlet branch (1132), the tail end of the first water outlet branch (1131) is communicated with a product to be tested (2), and the second water outlet branch (1132) leads to the bottom of the capillary glass tube (122). By monitoring the liquid level change in the capillary glass tube (122) before and after the water tightness test, the specific leakage amount of liquid of the test product in the test process can be calculated, so that the water tightness grade of the test product is judged, the test device structure is simplified, the test precision is greatly improved, and the device has a wide production and application prospect.
Description
Technical Field
The invention relates to the field of water tightness testing, in particular to a water tightness testing device.
Background
In the prior art, the water tightness test generally adopts the weight change of test liquid in a test product before and after the test to judge whether the test product has leakage and the leakage degree, so as to judge the water tightness grade of the test product, but the traditional test mode has some problems: the test liquid is remained in the test product, so that the test error is larger; the final water tightness grade judgment precision is low due to the low weighing precision; the weighing test steps are complicated, resulting in low test efficiency.
In view of the above, it is necessary to develop a water tightness testing device to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a water tightness testing device, which can convert the specific leakage amount of liquid of a tested product in the testing process only by monitoring the liquid level change in a broken glass tube before and after a water tightness test, so that the water tightness grade of the tested product is judged, the testing precision and the testing efficiency are greatly improved while the structure of the testing device is simplified, and the device has a wide production and application prospect.
To achieve the above objects and other advantages in accordance with the present invention, there is provided a water tightness testing device, including:
the water storage container comprises a closed water storage tank body with a certain internal space, and an air inlet pipe and an water outlet pipe which are respectively communicated with the top and the bottom of the water storage tank body;
capillary glass tubes with both upper and lower ends closed; and
a liquid level testing component for testing the liquid level change in the capillary glass tube, which is arranged at the side of the capillary glass tube,
the air inlet pipe is communicated with the atmosphere, the water outlet pipe is provided with a first pneumatic control valve, the tail end of the water outlet pipe is branched into a first water outlet branch and a second water outlet branch, the tail end of the first water outlet branch is communicated with a product to be detected, and the second water outlet branch leads to the bottom of the capillary glass tube.
Preferably, the capillary glass tube has an inner diameter of 0.1mm 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 communicated with a pressure tube, and the tail end of the pressure tube is branched into a first pressure branch and a second pressure branch.
Preferably, the first pressurizing branch is provided with a first fluid valve, and the second pressurizing branch is provided with a second fluid valve.
Preferably, the tail end of the second pressurizing branch is communicated with a gas source.
Preferably, the product to be tested is communicated with an overflow assembly, and the overflow assembly comprises:
an overflow pipe communicated with a product to be detected; and
a second air control valve and a liquid recovery tank which are arranged on the overflow pipe and are sequentially arranged along the flowing direction of the liquid.
Preferably, the level testing assembly comprises:
mounting a platform; and
a CCD camera mechanism arranged 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: the liquid level change in the wool glass tube before and after the water tightness test is monitored, the specific leakage volume of liquid of the test product in the test process can be calculated, so that the water tightness grade of the test product is judged, the test device structure is simplified, the test precision and the test efficiency are greatly improved, and the wide production application prospect is realized.
Drawings
Fig. 1 is a three-dimensional structural view of a water tightness testing device according to the present invention.
Detailed Description
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
Referring to fig. 1, a water tightness testing device 1 includes:
a water storage container 11 including a sealed water storage tank 111 having a certain internal space, and an air inlet pipe 112 and an water outlet pipe 113 respectively communicating the top and the bottom of the water storage tank 111;
a capillary glass tube 122 having both upper and lower ends sealed; and
the liquid level testing component 13 for testing the liquid level change in the capillary glass tube 122 is arranged at the side of the capillary glass tube 122,
the air inlet pipe 112 is communicated with the atmosphere, the water outlet pipe 113 is provided with a first air control valve 114, the tail end of the water outlet pipe 113 is branched into a first water outlet branch 1131 and a second water outlet branch 1132, the tail end of the first water outlet branch 1131 is communicated with a product 2 to be detected, and the second water outlet branch 1132 is communicated with the bottom of the capillary glass tube 122. The water tightness testing device 1 can calculate the specific volume of liquid leaked in the testing process of a testing product only by monitoring the liquid level change in the broken glass tubes before and after the water tightness test, so that the water tightness grade of the testing product is judged, the testing precision and the testing efficiency are greatly improved while the structure of the testing device is simplified, and the wide production and application prospect is realized.
Further, the inner diameter of the capillary glass tube 122 is 0.1mm to 1 mm. In one embodiment, the capillary glass tube 122 has an inner diameter of 0.1 mm; in another embodiment, the capillary glass tube 122 has an inner diameter of 10 mm; in a preferred embodiment, the capillary glass tube 122 has an inner diameter of 0.5 mm.
Referring again to fig. 1, the top of the capillary glass tube 122 is communicated with a pressurizing tube 123, and the end of the pressurizing tube 123 is branched 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, the end of the second pressurizing branch 1232 is connected to the gas source 126.
Further, the product 2 to be tested is communicated with an overflow assembly 14, and the overflow assembly 14 comprises:
an overflow pipe 141 communicated with the product 2 to be measured; and
a second pneumatic control valve 142 and a liquid recovery tank 143 provided on the overflow pipe 141 and arranged in this order in the liquid flow direction.
Referring again to FIG. 1, the fluid level testing assembly 13 includes:
a mounting platform 131; and
a CCD camera 132 disposed on the mounting platform 131,
wherein, a compensation light source 133 is arranged between the CCD photographing mechanism 132 and the capillary glass tube 122.
The testing steps are as follows:
s1, closing the first pneumatic control valve 114, the second pneumatic control valve 142, the first fluid valve 124 and the second fluid valve 125, and injecting a certain amount of test liquid into the water storage tank 111, where the test liquid may be distilled water or purified water or other liquid that does not corrode the product to be tested;
s2, opening the first pneumatic control valve 114 and the second pneumatic control valve 142, closing the first fluid valve 124 and the second fluid valve 125, adding a certain amount of air pressure into the water storage tank 111 through the air inlet pipe 112, pressing the test liquid to the product to be tested through the water outlet pipe 113 and the first water outlet branch 1131, so that the product 2 to be tested is filled with the test liquid, and closing the second pneumatic control valve 142 when the test liquid in the product 2 to be tested overflows into the liquid recovery tank 143;
s3, opening the first pneumatic control valve 114 and the second fluid valve 125, closing the second pneumatic control valve 142 and the first fluid valve 124, so that the test liquid in the water storage tank 111 overflows into the capillary glass tube 122 by gravity, and finally the liquid level in the capillary glass tube 122 is equal to the liquid level in the water storage tank 111, monitoring the liquid level state in the capillary glass tube 122 at that time by the CCD camera 132, recording the liquid level height position at that time, marking the liquid level height position at that time as liquid level height 1, and closing the second fluid valve 125;
s4, opening a second fluid valve 125, closing a first pneumatic control valve 114, a second pneumatic control valve 142 and a first fluid valve 124, starting pressurization and inflation of an air source 126 into the capillary glass tube 122, testing liquid level change in the capillary glass tube 122 through a CCD photographing mechanism 132, marking the liquid level height position at the moment as a liquid level height 2, converting liquid volume change in the testing process through calculating liquid level difference between the liquid level height 1 and the liquid level height 2 and the diameter size of the capillary glass tube 122, and further judging the water tightness grade of a tested product;
s5, opening the second pneumatic control valve 142 and the second fluid valve 125, closing the first fluid valve 124 and the first pneumatic control valve 114, pressurizing the gas source 126 again to press the test liquid in the capillary glass tube 122 together with the test liquid in the second water outlet branch 1132, the first water outlet branch 1131 and the test product 2 back into the liquid recovery tank 143, and ending the test.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (4)
1. A water tightness testing device (1), characterized by comprising:
a water storage container (11) which comprises a sealed water storage tank body (111) with a certain internal space, and an air inlet pipe (112) and an water outlet pipe (113) which are respectively communicated with the top and the bottom of the water storage tank body (111);
a capillary glass tube (122) with both upper and lower ends closed; and
a liquid level testing component (13) for testing the liquid level change in the capillary glass tube (122), which is arranged at the side of the capillary glass tube (122),
the air inlet pipe (112) is communicated with the atmosphere, the water outlet pipe (113) is provided with a first air control valve (114), the tail end of the water outlet pipe (113) is branched into a first water outlet branch (1131) and a second water outlet branch (1132), the tail end of the first water outlet branch (1131) is communicated with a product (2) to be detected, and the second water outlet branch (1132) leads to the bottom of the capillary glass tube (122);
the top of the capillary glass tube (122) is communicated with a pressurizing tube (123), and the tail end of the pressurizing tube (123) is branched into a first pressurizing branch (1231) and a second pressurizing branch (1232);
a first fluid valve (124) is arranged on the first pressurizing branch (1231), and a second fluid valve (125) is arranged on the second pressurizing branch (1232);
the tail end of the second pressurizing branch (1232) is communicated with an air source (126);
the product (2) to be measured is communicated with an overflow assembly (14), and the overflow assembly (14) comprises:
an overflow pipe (141) communicated with the product (2) to be detected; and
a second pneumatic control valve (142) and a liquid recovery tank (143) which are arranged on the overflow pipe (141) and are sequentially arranged along the liquid flowing direction;
the test procedure was as follows:
s1, closing the first pneumatic control valve (114), the second pneumatic control valve (142), the first fluid valve (124) and the second fluid valve (125), and injecting a certain amount of test liquid into the water storage tank body (111);
s2, opening a first air control valve (114) and a second air control valve (142), closing a first fluid valve (124) and a second fluid valve (125), adding a certain amount of air pressure into a water storage tank body (111) through an air inlet pipe (112), pressing test liquid to a product to be tested through an water outlet pipe (113) and a first water outlet branch (1131), enabling the test liquid to fill the product to be tested (2), and closing the second air control valve (142) when the test liquid in the product to be tested (2) overflows into a liquid recovery tank (143);
s3, opening a first pneumatic control valve (114) and a second fluid valve (125), closing the second pneumatic control valve (142) and the first fluid valve (124), enabling the test liquid in the water storage tank body (111) to overflow into the capillary glass tube (122) through self weight, finally enabling the liquid level in the capillary glass tube (122) to be equal to the liquid level in the water storage tank body (111), monitoring the liquid level state in the capillary glass tube (122) at the moment, recording the liquid level height position at the moment, marking the liquid level height position at the moment as a liquid level height one, and closing the second fluid valve (125);
s4, opening a second fluid valve (125), closing a first air control valve (114), a second air control valve (142) and a first fluid valve (124), starting pressurization and inflation of an air source (126) into the capillary glass tube (122), testing liquid level change in the capillary glass tube (122) through a liquid level testing component (13), marking the liquid level height position at the moment as a liquid level height II, converting liquid volume change in the testing process through calculating the liquid level difference between the liquid level height I and the liquid level height II and the diameter size of the capillary glass tube (122), and further judging the water tightness grade of the product to be tested;
s5, opening a second air control valve (142) and a second fluid valve (125), closing a first fluid valve (124) and a first air control valve (114), pressurizing the air source (126) again, and pressing the test liquid in the capillary glass tube (122) together with the test liquid in the second water outlet branch (1132), the first water outlet branch (1131) and the product to be tested (2) back to the liquid recovery tank (143) together, thus finishing the test.
2. The water tightness testing device (1) according to claim 1, wherein the capillary glass tube (122) has an inner diameter of 0.1mm to 10 mm.
3. The water tightness testing device (1) according to claim 2, wherein the capillary glass tube (122) has an inner diameter of 0.5 mm.
4. The water tightness testing device (1) according to claim 1, characterized in that the liquid level testing assembly (13) comprises:
a mounting platform (131); and
a CCD camera mechanism (132) arranged on the mounting platform (131),
wherein, a compensation light source (133) is arranged between the CCD photographing mechanism (132) and the capillary glass tube (122).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/114937 WO2019109287A1 (en) | 2017-12-07 | 2017-12-07 | Watertightness test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110291374A CN110291374A (en) | 2019-09-27 |
| CN110291374B true CN110291374B (en) | 2021-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780001983.2A Active CN110291374B (en) | 2017-12-07 | 2017-12-07 | Water tightness testing device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110291374B (en) |
| WO (1) | WO2019109287A1 (en) |
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| US5212979A (en) * | 1990-08-18 | 1993-05-25 | Robert Bosch Gmbh | Testing device for measurement of a leak rate of a spraying or injection valve |
| JPH10252615A (en) * | 1997-03-14 | 1998-09-22 | Nippon Injector Kk | Leak test device for fuel injection nozzle |
| CN101313144A (en) * | 2005-11-23 | 2008-11-26 | 罗伯特·博世有限公司 | Method and device for determining hydraulic leakage rate in liquid-conveying sections, in particular, injection valves of internal combustion engines |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110291374A (en) | 2019-09-27 |
| WO2019109287A1 (en) | 2019-06-13 |
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