CN101424583A - Hard bottle sealability detecting method and device thereof - Google Patents

Abstract

The present invention relates to a brand-new detection method and device for the tightness of hard bottles, in particular, a sealed hard bottle is used to generate an air pressure difference between the inside and outside of the bottle, and then check whether the pressure difference changes to detect the tightness of the hard bottle. Integrity methods and apparatus. The method of the present invention uses a vacuum cover to cover the bottle cover, and then a vacuum machine quickly evacuates the inside of the vacuum cover, and judges the sealing integrity of the hard bottle according to whether the vacuum degree in the vacuum cover changes. The vacuum sensor used in the present invention is fixed on the top of the vacuum cover. The device has the advantages of simple structure, high efficiency, high detection precision and fast working response.

Description

A method and device for detecting the airtightness of a hard bottle

technical field

The invention relates to a method and a device for detecting the airtightness of a hard bottle, which belongs to the field of airtightness inspection, and especially utilizes a sealed hard bottle to generate a relatively large air pressure difference inside and outside the bottle, and then checks the pressure difference Method and apparatus for testing rigid bottle seal integrity for changes.

Background technique

Rigid bottle packaging is used in many industries, such as beverage, pharmaceutical and chemical industries. Hard bottle packaging often needs to be sealed, and a tightness test is required after the hard bottle is sealed. If the sealing is not good, the properties of the substances in the bottle will change, which will cause great harm to the body of consumers and have a great adverse impact on the environment.

The existing detection method is to judge whether there is gas leakage at the sealing cap by putting the sample to be tested into water and inflating and pressurizing it. The main disadvantages of these detection methods are low efficiency, low degree of automation, or restrictions on site and equipment installation.

Contents of the invention

The purpose of the present invention is to address the above deficiencies, and proposes a method for detecting whether the pressure difference changes in the hard bottle and outside the bottle under the situation of a large air pressure difference to detect the tightness of the hard bottle, and using this method A detection device with simple structure, high efficiency and high detection precision, which can be used under any conditions, is designed.

The technical solution of the present invention is to adopt a vacuum cover (2) to cover the mouth of the hard bottle (1), and the contact between the vacuum cover (2) and the hard bottle (1) needs to ensure good sealing. Under the action of the vacuum machine (5), the inside of the vacuum cover (2) is quickly evacuated, and then the vacuum machine (5) stops working, and at the same time, the outside air is prevented from flowing into the vacuum cover under the action of the one-way valve (4). (2). A vacuum sensor (3) is installed on the vacuum cover (2) to measure the change of the vacuum degree in the vacuum cover (2). If the magnitude and change trend of the degree of vacuum measured by the vacuum sensor (3) are as shown in curve 1 in Figure 2, then the sealing is intact; Shown, then proves that hard bottle (1) leaks, and the faster the measured vacuum decreases, the more serious the leak.

Description of drawings

Fig. 1 is a schematic structural diagram of a rigid bottle airtightness detection device.

Fig. 2 shows the change of the vacuum degree inside the vacuum cover when it is quickly evacuated to a certain vacuum, the abscissa is time, and the ordinate is pressure. Curve 1 represents the seal is intact, curve 2 represents the existence of leakage.

Detailed ways

Referring to Fig. 1, the hard bottle leakage detection device includes a tested hard bottle (1), a vacuum cover (2), a vacuum sensor (3), a one-way valve (4), a vacuum pump (5), a bottom plate (6) . The vacuum sensor (3) is fixed on the top of the vacuum cover (2), and the measured hard bottle (1) is placed on the bottom plate (6). The vacuum cover (2) covers the mouth of the hard bottle (1), and under the action of the vacuum pump (5), the inside of the vacuum cover (2) is quickly evacuated, and under the action of the one-way valve (4) Prevent gas from flowing into the vacuum hood (2). A vacuum sensor (3) is installed on the vacuum cover (2) to measure the change of the vacuum degree in the vacuum cover (2).

Claims (3)

1. A hard bottle airtightness detection method and device thereof, characterized in that the mouth of the hard bottle that has been packaged is evacuated, and then whether the degree of vacuum changes is detected to judge the integrity of the hard bottle seal. The device consists of It consists of a vacuum cover (2), a vacuum sensor (3), a one-way valve (4), a vacuum pump (5) and a bottom plate (6). 2. According to claim 1, vacuuming the mouth of the hard bottle is characterized in that after the vacuum cover (2) covers the cover of the bottle to be detected, the vacuum cover (2) is vacuumed under the action of the vacuum machine (5). ) into a vacuum. 3. The detection vacuum degree according to claim 1, characterized in that a vacuum sensor (3) is installed on the vacuum cover (2), which can detect the change of the vacuum degree.

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