CN103257022A - Seal testing instrument and seal testing methods - Google Patents

Abstract

The invention discloses a seal testing instrument which is suitable for detecting a seal degree of the inside of a product and comprises a sealed container, an electric control box, a barometer and an air pump. The air pump is communicated with the sealed container. The barometer detects a pressure value inside the sealed container. The barometer and the air pump are respectively electrically connected with the electric control box. The seal testing instrument is simple in structure, easy and convenient to operate, easy to use and accurate in testing. In addition, the invention further discloses two seal testing methods according to which the seal testing instrument is used for testing the seal degree of a product.

Description

Sealing tester and sealing test method

technical field

The invention relates to a tester, in particular to a seal tester for testing whether the inside of an LED lamp is sealed and a seal test method for testing the seal degree of a product by using the seal tester.

Background technique

With the continuous improvement of the level of science and technology and people's awareness of energy saving and environmental protection, IED lights are widely used in daily production and life. At the same time, the requirements for the use of LED lights are gradually increasing, especially for outdoor use of LED lights. It is more prominent, which makes the process of sealing performance testing added in the production of LED lights.

The detection method generally adopted by the existing LED lamp is to completely immerse it in water, and after a certain period of time, observe whether there are bubbles emerging from the surface of the LED lamp. Although this method can detect LED lights with serious internal air leakage, it is difficult to detect LED lights with slight air leakage after soaking for a short period of time. Even if it is detected, technicians need to pick up the LED from the water and treat it Put it in the water and retest the leaking part. Therefore, said method not only needs to spend a large amount of time, and operation is very cumbersome, seriously reduces work efficiency, and the accuracy of detection is low, reduces the qualified rate of product.

Based on the above-mentioned deficiencies, there is a need for a leak tester with simple structure, easy operation, ease of use and accurate testing.

Contents of the invention

The object of the present invention is to provide a sealing tester with simple structure, easy operation, easy use and accurate test.

Another object of the present invention is to provide a sealing test method for testing the sealing degree of a product by using a sealing tester.

Another object of the present invention is to provide another sealing test method using a sealing tester to test the sealing degree of a product.

In order to achieve the above object, the present invention provides a sealing tester, which is suitable for detecting the degree of sealing inside the product, including an airtight container, an electric control box, an air pressure gauge and an air pump, the air pump communicates with the airtight container, and the air pressure gauge The air pressure value in the airtight container is detected, and the air pressure gauge and the air pump are respectively electrically connected to the electric control box.

Preferably, the airtight tester also includes an air valve, the air valve is electrically connected to the electric control box, the air valve has an air inlet channel and an air outlet channel, and the air pump and the airtight container are connected to the airtight container respectively. The air inlet passage is connected, and the inside of the airtight container and the product are respectively connected with the air outlet passage. By setting the air valve, the air valve can communicate or block between the air pump and the airtight container and between the airtight container and the product, so as to ensure that the air valve is in one of the states of air intake or air output, and through The centralized control of the electric control box is convenient for the inspector to operate.

Specifically, the sealing tester further includes a clamp, and the clamp clamps and fixes the product. Since the product to be tested is outside, setting the fixture can effectively fix the product to be tested, preventing movement during the full process and affecting the accuracy of the test.

Specifically, the airtight tester also includes an air pressure controller, the electric control box is provided with a display device, the air pressure controller detects the air pressure in the airtight container and controls the display device through the electric control box Show signal. The air pressure controller can detect the air pressure in the airtight container, so as to output different signals and cooperate with the electric control box to control the display of the display device, so that the tester can quickly judge the test result of the tested product , to further facilitate the control of the inspector, and effectively improve work efficiency.

More specifically, the display device includes a green light and a red light. Using the green light and the red light further enables the tester to quickly judge the test result of the tested product.

Specifically, a timer is also provided on the electric control box, and the timer records the test time. Because the tested product may have a slight air leak, it takes a certain amount of time for the gas in the airtight container to enter the tested product. Therefore, the timer can be set to test after the air pressure in the airtight container is stabilized, thereby Make the test results more accurate.

Since the present invention sets the airtight container, uses the electric control box to control the air pump to inflate the airtight container, and uses the barometer to measure the air pressure in the airtight container, if the If the air pressure is the same as the air pressure value set by the electric control box, the tested product will not leak, so that it can be judged that the tested product is sealed; otherwise, the tested product is not sealed. For the purpose of measuring the sealing degree of the tested product, the entire sealing tester has a simple structure, and only needs to be controlled by the electric control box and the test result can be accurately judged according to the instructions of the electric control box. It is easy to operate and easy to use.

A sealing test method, using the sealing tester to test the sealing degree of a product, comprising the following steps: (1) placing a completely sealed product in the airtight container, filling the airtight container with an air volume of Q gas, and record the air pressure value in the airtight container, set it as the maximum value M; place the unsealed product in the airtight container, fill the airtight container with gas with a gas volume of Q, and record the The air pressure value in the airtight container is set to the minimum value m; (2) Place the product to be tested in the airtight container, and fill the airtight container with a gas volume Q; (3) Keep it for a certain time T , record the air pressure value F in the airtight container; (4) compare the air pressure value F with the maximum value M and the minimum value m, if F is equal to M, then the tested product is sealed; if F is less than M and at the same time If F is greater than m, and F continues to change, the product under test has a slight air leak; if F is equal to m, the product under test has a serious air leak.

A sealing test method, which uses the sealing tester to test the sealing degree of the product, comprising the following steps: (1) connecting the completely sealed product with the airtight container, and filling the airtight container with gas with a gas volume of Q , and record the air pressure value in the airtight container, set it as the maximum value M; communicate the unsealed product with the airtight container, fill the airtight container with a gas volume of Q, and record the airtight container (2) connect the tested product to the airtight container, and fill the airtight container with a gas volume of Q; (3) keep a certain time T, record the (4) Compare the air pressure value F with the maximum value M and the minimum value m, if F is equal to M, then the tested product is sealed; if F is less than M and F is greater than m , and F continues to change, the product under test has a slight air leak; if F is equal to m, the product under test has a serious air leak.

Description of drawings

Fig. 1 is a structural schematic diagram of a sealing tester of the present invention.

Fig. 2 is a state diagram of the seal tester of the present invention using the first method to detect the tested product.

Fig. 3 is a state diagram of the seal tester of the present invention using the second method to detect the tested product.

Fig. 4 is a flow chart of a method of testing a product under test using a seal tester.

Fig. 5 is a flow chart of another method of testing a product under test using a seal tester.

Detailed ways

In order to describe the technical content, structural features, and achieved effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

As shown in FIG. 1 , the sealing tester 100 of the present invention is used for the sealing degree inside the lamp holder 200 of the LED lamp, so as to obtain the waterproof performance of the lamp holder 200 . The airtight tester 100 includes an airtight container 1, an electric control box 2, an air pressure gauge 3, an air pump 4, an air valve 5, an air pressure controller 6 and a fixture (not shown in the figure). The air pump 4 communicates with the airtight container 1; the air pressure gauge 3 detects the air pressure value in the airtight container 1; the air valve 5 has an air inlet passage 51 and an air outlet passage 52, and the air pump 4 and the air outlet The airtight container 1 communicates with the air inlet channel 51 respectively, and the interior of the airtight container 1 and the lamp holder 200 communicates with the air outlet channel 52 respectively, and the air inlet channel 51 and the air outlet channel 52 of the air valve 5 It is controlled by the air inlet and outlet control switch 20 on the electric control box 2 . The electric control box 2 is provided with a display device, the air pressure controller 6 detects the air pressure in the airtight container 1 and controls the display device to display signals through the electric control box 2; the clamp clamps and fixes the The light stand 200; the electric control box 2 is also provided with a timer 7, and the timer 7 records the test time. The air pressure gauge 3 , the air pump 4 , the air valve 5 and the air pressure controller 6 are respectively electrically connected to the electric control box 2 , and the electric control box 2 is connected to a power source 8 . The airtight container 1 is a long cylindrical structure.

As shown in Figure 2 and Figure 3, the present invention can use two test methods to detect the lamp holder 200: the first is to place the lamp holder 200 inside the airtight container 1; the second is to place the lamp holder 200 inside the airtight container 1; The lamp holder 200 is placed outside the airtight container 1 and communicates with the airtight container 1 . Therefore, setting the airtight container 1 in a cylindrical shape can facilitate the placement of the lamp holder 200; of course, when the tested product has other shapes, the airtight container 1 can be set in other shapes as required. The air pressure controller 6 can detect the air pressure in the airtight container 1, so as to output different signals and cooperate with the electric control box 2 to control the display of the display device, so that the inspector can quickly judge the product under test The test results are more convenient for the tester to control and effectively improve work efficiency. Specifically, the display device includes a green light 21 and a red light 22 . When the lamp holder 200 is sealed, the green lamp 21 is on, and when the lamp holder 200 is not sealed, the red lamp 22 is on; the use of the green lamp 21 and the red lamp 22 further enables the tester to quickly judge the product under test test results. In addition, because the product under test may have a slight air leak or a serious air leak, when the product under test has a slight air leak, it will take a certain amount of time for the gas in the airtight container 1 to enter the product under test. The timer 7 can be tested after the air pressure in the airtight container 1 is stabilized, so that the test result is more accurate.

As shown in Figure 3 again, when using the second test method, in the process of the air pump 4 inflating the airtight container 1, the air valve 5 can communicate between the air pump 4 and the airtight container 1 , and block the interior of the airtight container 1 and the lamp holder 200, so as to ensure that the airtight container 1 is in a normal inflated state; , the air valve can block the air pump 4 from the airtight container 1, and connect the airtight container 1 to the inside of the lamp holder 200, so as to ensure that the airtight container 1 is in a normal air outlet state. In addition, setting the fixture can effectively fix the product to be tested, preventing movement during the full process and affecting the accuracy of the test.

Two kinds of testing methods of the sealing tester 100 of the present invention are as follows:

As shown in Figure 2 and Figure 4, the first test method includes the following steps:

S11 Place the completely sealed product in the airtight container 1, fill the airtight container 1 with gas with a gas volume of Q, and record the air pressure value in the airtight container 1, which is set to the maximum value M1; The sealed product is placed in the airtight container 1, and the air volume Q is filled into the airtight container 1, and the air pressure value in the airtight container 1 is recorded, which is set as the minimum value m1. The maximum value M1 is the air pressure value when the gas in the airtight container 1 does not enter the inner space of the completely sealed product at all and is stable; the minimum value m1 is that the gas in the airtight container 1 is completely filled The internal space of the unsealed product is at a stable air pressure value; the maximum value M1 and the minimum value m1 can be obtained through repeated tests. In this step, before the airtight container 1 is filled with gas twice, the air pressure in the airtight container 1 must be consistent. Before the air pump 4 of the present invention inflates the airtight container 1, the airtight container 1 The air pressure inside is normal pressure or standard atmospheric pressure.

S12 Place the product to be tested in the airtight container 1, and fill the airtight container 1 with gas with a gas volume Q. In this step, before the airtight container 1 is filled with gas, the air pressure in the airtight container 1 is normal pressure or standard atmospheric pressure; The product and the unsealed product are the same product.

S13 Keeping for a certain time T, recording the air pressure value F1 in the airtight container 1 . The time T can be determined by repeatedly testing the time required for the gas in the airtight container 1 to enter the unsealed product.

S14 compares the air pressure value F1 with the maximum value M1 and the minimum value m1. If F1 is equal to M1, the product under test is sealed; if F1 is less than M1 and F is greater than m1, and F1 continues to decrease, the product under test Slight air leakage; if F1 is equal to m1, the tested product has serious air leakage.

As shown in Figure 3 and Figure 5, the second test method includes the following steps:

S21 connects the completely sealed product with the airtight container 1, fills the airtight container 1 with gas with a gas volume of Q, and records the air pressure value in the airtight container 1, which is set to the maximum value M2; The product communicates with the airtight container 1, fills the airtight container 1 with a gas volume of Q, and records the air pressure value in the airtight container 1, which is set as the minimum value m2. The maximum value M2 is the air pressure value when the gas in the airtight container 1 does not enter the inner space of the completely sealed product and is stable; the minimum value m2 is the gas in the airtight container 1 is completely full The internal space of the unsealed product is at a stable air pressure value; the maximum value M2 and the minimum value m2 can be obtained through reverse testing. In this step, before the airtight container 1 is filled with gas twice, the air pressure in the airtight container must be consistent. Before the airtight container 1 of the present invention is filled with gas, the air pressure in the airtight container 1 is Atmospheric pressure or standard atmospheric pressure.

S22 connect the tested product with the airtight container 1, and fill the airtight container 1 with gas with a gas volume Q. In this step, before the airtight container 1 is filled with gas, the air pressure in the airtight container 1 is normal pressure or standard atmospheric pressure; The product and the unsealed product are the same product.

S23 Keeping for a certain time T2, recording the air pressure value F2 in the airtight container 1 . The time T2 can be determined by repeatedly testing the time required for the gas in the airtight container 1 to enter the unsealed product.

S24 compares the air pressure value F2 with the maximum value M2 and the minimum value m2, if F2 is equal to M2, then the tested product is sealed; if F2 is less than M2 and F is greater than m2, and F2 continues to decrease, then the tested product Slight air leakage; if F2 is equal to m2, the tested product has severe air leakage.

Since the present invention is provided with the airtight container 1, utilizes the electric control box 2 to control the air pump 4 to inflate the airtight container 1, and uses the barometer 3 to measure the air pressure in the airtight container 1, if If the air pressure in the airtight container 1 is the same as the air pressure value set by the electric control box 2, the tested product will not leak air, thereby judging that the tested product is sealed; otherwise, the tested product will not be sealed. Therefore, by measuring the The air pressure value in the airtight container 1 changes, so as to achieve the purpose of measuring the sealing degree of the tested product. The entire sealing tester 100 is simple in structure, and only needs to be controlled by the electric control box 2 and can be accurately judged according to the instructions of the electric control box 2 Test results, easy to operate and easy to use.

The above disclosures are only preferred examples of the present invention, and of course cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the patent scope of the present invention still fall within the scope of the present invention.

Claims (8)

1. sealing test instrument, be applicable to the seal degree of testing product inside, it is characterized in that: comprise closed container, electric cabinet, rain glass and air pump, described air pump is communicated with described closed container, described rain glass detects described closed container internal gas pressure value, and described rain glass and air pump are electrically connected with described electric cabinet respectively.

2. sealing test instrument as claimed in claim 1, it is characterized in that: described sealing test instrument also comprises air valve, described air valve is electrically connected with described electric cabinet, described air valve has inlet channel and outlet passageway, described air pump and described closed container are communicated with described inlet channel respectively, and the inside of described closed container and described product is communicated with described outlet passageway respectively.

3. sealing test instrument as claimed in claim 2, it is characterized in that: described sealing test instrument also comprises anchor clamps, described anchor clamps clamping and fixing described product.

4. sealing test instrument as claimed in claim 1 or 2, it is characterized in that: described sealing test instrument also comprises gas pressure regulator, described electric cabinet is provided with display device, and described gas pressure regulator detects the air pressure in the described closed container and controls described display device by described electric cabinet and shows signal.

5. sealing test instrument as claimed in claim 4, it is characterized in that: described display device comprises green light and red light.

6. sealing test instrument as claimed in claim 1 or 2 is characterized in that: also be provided with timer on the described electric cabinet, described timer recording test time.

7. tightness testing method utilizes the seal degree of each described sealing test instrument test products of claim 1 to 6, it is characterized in that, may further comprise the steps:

(1) product that will seal fully places in the described closed container, charges into the gas that tolerance is Q in described closed container, and records the atmospheric pressure value in the described closed container, is made as maximal value M; Packing less product is placed in the described closed container, in described closed container, charge into the gas that tolerance is Q, and record the atmospheric pressure value in the described closed container, be made as minimum value m;

(2) tested product is placed in the described closed container, and in described closed container, charge into the gas that tolerance is Q;

(3) keep certain time interval T, record the atmospheric pressure value F in the described closed container;

(4) with described atmospheric pressure value F and maximal value M and minimum value m contrast, if F equals M, then tested product seals; Simultaneously F is greater than m if F is less than M, and F continues to diminish, and then tested product slightly leaks gas; If F equals m, then tested product seriously leaks gas.

8. tightness testing method utilizes the seal degree of each described sealing test instrument test products of claim 1 to 6, it is characterized in that, may further comprise the steps:

(1) product that will seal fully is communicated with described closed container, charges into the gas that tolerance is Q in described closed container, and records the atmospheric pressure value in the described closed container, is made as maximal value M; Packing less product is communicated with described closed container, in described closed container, charges into the gas that tolerance is Q, and record the atmospheric pressure value in the described closed container, be made as minimum value m;

(2) tested product is communicated with described closed container, and in described closed container, charges into the gas that tolerance is Q;

(3) keep certain time interval T, record the atmospheric pressure value F in the described closed container;

(4) with described atmospheric pressure value F and maximal value M and minimum value m contrast, if F equals M, then tested product seals; Simultaneously F is greater than m if F is less than M, and F continues to diminish, and then tested product slightly leaks gas; If F equals m, then tested product seriously leaks gas.

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