TWI600889B - No liquid container leak detection device and its detection method - Google Patents

Description

Liquid-free container leak detecting device and detecting method thereof

The invention relates to a detecting device and a method for detecting whether a container leaks without liquid, in particular to a liquid-free container leak detecting device capable of quickly and without checking the liquid in the container for detecting leakage, and a detecting method thereof.

In the current manufacturing plants for paper cups, paper bowls, plastic cups, etc., when detecting whether the produced container will leak, the test method is to inject the colored liquid into the sampled container (the colored liquid is more obvious for visual inspection and It is easier to find the application), and the container is placed on a transparent acrylic plate, and the light is irradiated upwards under the acrylic plate, and then left to stand for 20 to 30 minutes, and then the self-pressing plate is naked to the eye. Look down to see if there is any leakage under the container (as shown in Figure 1-2).

This type of detection is relatively inefficient due to waiting for a long period of time, and regardless of whether there is leakage, the color of the liquid will penetrate into the container due to the color liquid being placed and allowed to stand for a certain period of time, resulting in the container after the detection. Both need to be scrapped, so this kind of conventional detection method is not a good detection method.

Therefore, in view of the shortcomings derived from the above-mentioned conventional detection methods, the inventors of the present invention have improved and innovated, and after years of painstaking research, finally successfully developed and completed the liquid-free container leakage detecting device and the detecting method thereof.

In order to solve the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a method and apparatus for inspecting whether a container leaks quickly and without the need to hold a liquid.

In order to achieve the above object, the present invention is mainly directed to a container positioning unit on which a plurality of containers are placed, at least one vacuum extractor and a plurality of pressure detectors, and the container positioning unit is facing from the top. The recessed portion is provided with a receiving groove, the bottom of the receiving groove has at least one air guiding hole, and the vacuum extractor is connected to the air guiding holes for extracting the air in the receiving groove through the air guiding hole, and the like The pressure sensor is used to detect the pressure change in the accommodating tank to detect whether the container has a leak.

Wherein, the vacuum extractor continuously draws air from the accommodating grooves from the air guiding holes at an atmospheric pressure of -0.1 to -1.0 kPa (Kpa).

And the plurality of alarm devices respectively corresponding to the pressure detectors, wherein the pressure detectors detect the air pressure in the accommodating slots is higher than a set pressure, and the pressure detectors The detector sends a signal to the alarm devices for warning. The alarm device is an illuminated display, an audible alarm or other device with an alarm function.

In addition, a plurality of pressure setting and display screens are respectively included, and the pressure setting and display screens respectively correspond to pressure detectors for displaying pressure changes detected by the pressure detectors.

The container placement unit extends from the accommodating slot to the outer edge of the container arranging unit and is provided with an airtight member, and the opening of the airtight member extends from the accommodating groove to the upper of the accommodating groove.

The airtight component is made of soft foamed plastic, rubber or soft silicone rubber.

1‧‧‧ machine

2‧‧‧ Container positioning unit

21‧‧‧ accommodating slots

22‧‧‧Air guide hole

23‧‧‧Airtight components

231‧‧‧ openings

3‧‧‧Vacuum extractor

4‧‧‧ Pressure detector

5‧‧‧ alarm device

6‧‧‧ Pressure setting and display screen

7‧‧‧ Container

S01‧‧‧Place the container in the receiving groove of the container positioning unit with the bottom down

S02‧‧‧Vacuum extractor continuously extracts the air in the accommodating tank from the air guide hole one by one or at the same time with an atmospheric pressure of -0.1~-1 kPa (Kpa)

S03‧‧‧ Pressure sensor detects pressure changes in the receiving tank

S04‧‧‧The pressure sensor detects that the gas pressure inside the accommodating tank is less than the set pressure

S05‧‧‧No leak at the bottom of the container

S16‧‧‧ Pressure sensor detects that the gas pressure inside the accommodating tank is greater than the set pressure

S07‧‧‧There is a leak at the bottom of the container

S08‧‧‧ alarm device issued an alarm

1 to 2 are schematic views of a conventional technique; FIG. 3 is a perspective view of a liquid-free container leakage detecting device of the present invention; FIG. 4 is a side cross-sectional view of the container positioning unit of the present invention; FIG. 6 is a schematic structural view of a liquid-free container leakage detecting device according to the present invention; and FIG. 7 is a flow chart of the liquid-free container leakage detecting method of the present invention.

The specific embodiments are described below to illustrate the embodiments of the present invention, but are not intended to limit the scope of the present invention to be protected: please refer to FIGS. 3-6, the liquid-free container leakage detecting device and the detecting method thereof, Mainly by means of vacuum extraction and to determine the pressure change to detect whether the container 7 is leaking.

The device of the present invention mainly comprises a machine table 1 , which is provided with a plurality of container positioning units 2 , at least one vacuum extractor 3 , a plurality of pressure detectors 4 and a plurality of alarm devices 5 , and each container positioning unit 2 is Fixing on the top surface of the machine table 1 for the container 7 to be placed thereon for detecting the leakage of the container, wherein each container positioning unit 2 is recessed from the top surface The bottom of the accommodating groove 21 has at least one air guiding hole 22, and the container arranging unit 2 extends from the accommodating groove 21 to the outer edge of the container arranging unit 2, and is provided with a soft foaming plastic and rubber. Or the airtight component of the soft silicone material, and the opening of the airtight component extends from the inside of the accommodating groove toward the accommodating groove, so that the wall surface of the container 7 and the surface of the opening are in contact with each other.

The vacuum extractor 3 is connected to the air guiding hole 22 at the bottom of the container positioning unit 2, and the pressure sensors are used to detect the pressure change in the receiving groove 21, and the alarm devices 5 are respectively associated with the same. The pressure sensor connection device of the present invention further includes a pressure setting and display screen 6 of a plurality of settable pressures, and the pressure setting and display screens respectively correspond to the pressure detectors. 4. For the quality assurance personnel to observe the pressure change and the set pressure detected by the pressure detector 4.

Referring to FIG. 3 to FIG. 7 , when the liquid-free container leakage detecting device of the present invention performs the container leakage detecting process, the container 7 is mainly placed in the receiving groove 21 of the container positioning unit 2 in a bottom-down manner (S01 And the outer side wall surface of the container 7 and the surface of the opening 231 of the airtight member 23 are fitted to each other, so that the bottom of the container 7 is inserted into the accommodating groove 21, and then the vacuum extractor 3 is activated to make the vacuum extractor 3 The air in the accommodating groove 21 is continuously withdrawn from the air guiding hole 22 by the atmospheric pressure of -0.1~-1.0 kPa (Kpa), and the air in the accommodating groove 21 is extracted from the vacuum extractor 3. When the pressure sensor detects the pressure change in the accommodating groove 21 (S03), if the pressure sensor detects that the gas pressure inside the accommodating groove 21 is less than the set pressure (S04), it represents the bottom of the container 7. There is no leakage (S05), so when the air in the accommodating groove 21 is continuously extracted, a vacuum state is formed in the accommodating groove 21, and when the pressure sensor detects the gas pressure inside the accommodating groove 21 When it is larger than the set pressure (S06), it means that there is a leak at the bottom of the container 7 (S07), and therefore, when it is accommodated in the groove 21 When the air is continuously drawn, the air outside the container 7 is also drawn into the accommodating groove 21 from the leak at the bottom of the container 7, and when the pressure detector 4 detects that the gas pressure in the accommodating groove 21 is higher than the setting When the gas pressure is applied, the alarm device 5 connected to the pressure detector 4 issues an alarm (S08) to indicate that the detected container 7 is defective.

From the above, the present invention has the following features and effects as compared with the conventional method of detecting whether the container 7 leaks:

1. The present invention directly extracts the air in the accommodating tank through the vacuum extractor, and judges whether the container has a leak according to the pressure change in the accommodating tank, and pours the water having the color into the container for 30 minutes. By observing the manner in which the bottom of the container is leaky, the present invention clearly detects whether the container leaks more quickly than in the conventional manner.

2. The present invention directly extracts the air in the accommodating tank through the vacuum extractor, and judges whether the container has a leak according to the pressure change in the accommodating tank, so that it is not necessary to pour a colored liquid into the container to observe whether it leaks. Therefore, the present invention can detect each of the produced containers without the need for sampling in a conventional manner, so that the present invention can be more comprehensively detected than the conventional method to reduce the occurrence of defective products, and has been detected. The cup can be discarded without any loss.

The detailed description of the preferred embodiments of the present invention is intended to be limited to the scope of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.

S01‧‧‧Place the container in the receiving groove of the container positioning unit with the bottom down

S02‧‧‧Vacuum extractor continuously extracts the air in the accommodating tank from the air guide hole one by one or at the same time with an atmospheric pressure of -1~-0.1 kPa (Kpa)

S03‧‧‧ Pressure sensor detects pressure changes in the receiving tank

S04‧‧‧The pressure sensor detects that the gas pressure inside the accommodating tank is less than the set pressure

S05‧‧‧No leak at the bottom of the container

S06‧‧‧The pressure sensor detects that the gas pressure inside the accommodating tank is greater than the set pressure

S07‧‧‧There is a leak at the bottom of the container

S08‧‧‧ alarm device issued an alarm

Claims (8)

A liquid-free container leakage detecting method, the steps comprising: a. placing the container in a bottom-down manner in a receiving groove recessed from the top of the container positioning unit, and affixing the outer wall of the container to the self-accommodating The inner side of the groove extends to the upper edge of the airtight member of the outer edge of the container placement unit, so that the wall surface of the container is in close contact with the surface of the opening, so that the outer wall surface of the container forms a closed space with the receiving groove; b. The vacuum extractor is activated to continuously draw the air in the accommodating groove from the air guiding hole at the bottom of the accommodating groove, thereby forming a vacuum state in the sealed space; c. detecting the sealing formed by the outer wall surface of the container and the accommodating groove by using the pressure detector The pressure change in the space is used as a judgment as to whether or not the container is leaking. The liquid-free container leakage detecting method according to claim 1, wherein the vacuum extractor uses a pressure setting and display screen setting vacuum extractor to continuously flow from the air guiding hole at an atmospheric pressure of -0.1 to -1.0 kPa (Kpa). The air in the accommodating tank is taken out. The liquid-free container leakage detecting method according to claim 1, wherein the warning device is a light-emitting display, an audible alarm or other device having an alarm function. The liquid-free container leak detecting method according to claim 1, wherein the pressure detector can display the detected pressure change through a pressure setting and display screen. The invention relates to a liquid-free container leakage detecting device, which mainly comprises: a machine table; a plurality of container positioning units, wherein the container positioning units are fixed on the machine table, and the top surface of the container positioning units is recessed and provided with a receiving groove For the container to be placed, and at least one air guiding hole is arranged at the bottom of the container positioning unit; At least one vacuum extractor is disposed in the machine, and is connected to the air guiding holes from the bottoms of the container positioning units for respectively separating the air in the receiving slots from the air a plurality of airtight elements extending from the accommodating grooves to the outer edges of the container accommodating units; the plurality of pressure detectors, the pressure detectors The detector is used to detect changes in air pressure in the receiving tank. The liquid-free container leakage detecting device according to claim 5, wherein the vacuum extractor continues to be in the accommodating groove from the air guiding holes at an atmospheric pressure of -0.1 to -1.0 kPa (Kpa). The air is drawn out. The liquid-free container leakage detecting device of claim 5, further comprising at least one pressure setting and display screen, wherein the pressure setting and display screen is used to set the vacuum extractor to respectively separate the air in the receiving slots The air guiding holes are extracted, and the pressure setting and display screens and corresponding pressure detectors are used to display the pressure changes detected by the pressure detectors. The liquid-free container leakage detecting device according to claim 5, wherein the airtight member is a soft foamed plastic, rubber or soft silicone.