Air tightness detection device

Abstract

The air tightness detection device comprises a rack, an air leakage extrusion mechanism, a pressure detection mechanism and a product discharging mechanism, the air leakage extrusion mechanism is arranged on the rack and used for extruding a product, and the pressure detection mechanism is arranged on the rack and is adjacent to the air leakage extrusion mechanism; the pressure detection mechanism is used for detecting product pressure to judge whether product packages are damaged and leak air or not, the product discharging mechanism is arranged on the rack and adjacent to the pressure detection mechanism, the product discharging mechanism is used for discharging, and the air leakage extrusion mechanism is further used for conveying extruded products to the pressure detection mechanism. The pressure detection mechanism is further used for conveying the detected products to the product discharging mechanism. The device has the advantages of simple structure, reasonable design, accurate detection, high detection efficiency and the like.

Description

Technical Field

[0001] This invention belongs to the field of packaging leakage detection technology, specifically relating to an airtightness detection device. Background Technology

[0002] Products sold to end customers are generally packaged in a certain way for ease of transportation and storage. For example, many food products are often sealed in plastic bags and filled with nitrogen to slow down the spoilage of the contents. In this case, it is necessary to test the airtightness of the packaging bag.

[0003] Currently, there are two methods in the industry to test the airtightness of packaging bags: First, place the packaging bag containing the product into a sealed container, fill the sealed container with a certain amount of gas, and then test the gas pressure inside the container. If the gas pressure is too low, it indicates that the packaging bag is leaking. Second, place the packaging bag containing the product into a water container. After a period of time, if the liquid level is too low, it indicates that the packaging bag is leaking.

[0004] Both of the above methods suffer from extremely low efficiency and slow detection speed. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides an airtightness detection device with high detection efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An airtightness testing device includes:

[0008] frame;

[0009] An air-leaking extrusion mechanism is mounted on a frame and used to extrude products;

[0010] The pressure detection mechanism is mounted on the frame and is located adjacent to the air leakage extrusion mechanism. The pressure detection mechanism is used to detect the product pressure to determine whether the product packaging is damaged and leaking air.

[0011] The product feeding mechanism is set on the frame and adjacent to the pressure detection mechanism. The product feeding mechanism is used for feeding, and the air leakage extrusion mechanism is also used to transport the extruded product to the pressure detection mechanism. The pressure detection mechanism is also used to transport the tested product to the product feeding mechanism.

[0012] Preferably, the air leakage extrusion mechanism includes a first bracket mounted on a frame. The first bracket is equipped with a first screw adjustment assembly, a first conveyor line, and a second conveyor line. The first and second conveyor lines are vertically spaced and correspondingly arranged, with the second conveyor line located above the first conveyor line. The first screw adjustment assembly is connected to the second conveyor line and is used to adjust the vertical position of the second conveyor line. The first and second conveyor lines are used to transport the extruded product to the pressure detection mechanism.

[0013] Preferably, the pressure detection mechanism includes a second bracket mounted on a frame. The second bracket is equipped with a second lead screw adjustment assembly, a telescopic cylinder, a third conveyor line, a fourth conveyor line, and a pressure sensor. The third and fourth conveyor lines are vertically spaced and correspondingly arranged, with the fourth conveyor line located above the third conveyor line. The telescopic cylinder is connected to the fourth conveyor line and drives the fourth conveyor line to move vertically. The second lead screw adjustment assembly is connected to the telescopic cylinder and is used to adjust the vertical position of the telescopic cylinder. The third and fourth conveyor lines are used to transport the tested products to the product unloading mechanism. The pressure sensor is mounted on the fourth conveyor line.

[0014] Preferably, the product unloading mechanism includes an unloading conveyor line, which is installed on the frame for unloading materials.

[0015] Preferably, it also includes a defective product rejection mechanism, which includes a pushing cylinder and a defective product collection box. The pushing cylinder is located on one side of the machine frame loading and unloading conveyor line, and the defective product collection box is located on the other side of the machine frame loading and unloading conveyor line and is positioned opposite to the pushing cylinder.

[0016] Preferably, it also includes a display screen, which is mounted on a rack.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects:

[0018] This invention includes components such as a leakage extrusion mechanism and a pressure detection mechanism. In specific applications, the pressure value of the product is constant within a certain range. The leakage extrusion mechanism can extrude a certain amount of pressure on the product, reducing the gas inside. After passing through the pressure detection mechanism, the pressure detection mechanism extrudes and detects the product. If the detected pressure value is significantly lower than the constant pressure value within a certain range, it proves that the product is leaking. This structure allows for fully automatic operation, is simple in structure, has a reasonable design, provides accurate detection, and has high detection efficiency.

[0019] In summary, the present invention has the advantages of simple structure, reasonable design, accurate detection, and high detection efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is an exploded view of the pressure detection mechanism of the present invention. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0024] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Example 1

[0028] In this embodiment, an airtightness testing device is proposed, which uses pressure testing to achieve airtightness testing of a product.

[0029] like Figure 1 and Figure 2As shown, in one embodiment of the present invention, the airtightness detection device of the present invention includes a frame 1, a leakage extrusion mechanism, a pressure detection mechanism, a product unloading mechanism, a defective product rejection mechanism, and a display screen 2. The leakage extrusion mechanism is disposed on the frame 1 and is used to extrude the product. The pressure detection mechanism is disposed on the frame 1 and is adjacent to the leakage extrusion mechanism. The pressure detection mechanism is used to detect the product pressure to determine whether the product packaging is damaged and leaking air. The product unloading mechanism is disposed on the frame 1 and is adjacent to the pressure detection mechanism. The product unloading mechanism is used to unload the product. The leakage extrusion mechanism is also used to transport the extruded product to the pressure detection mechanism. The pressure detection mechanism is also used to transport the tested product to the product unloading mechanism. The display screen 2 is mounted on the frame 1. In specific applications, the product passes through the leakage extrusion mechanism, the pressure detection mechanism, and the product unloading mechanism in sequence. During this process, defective products (i.e., leaking products) detected will be rejected by the defective product rejection mechanism.

[0030] The air leakage extrusion mechanism of the present invention includes a first support 3, which is mounted on a frame 1. A first lead screw adjustment assembly 4, a first conveyor line 5, and a second conveyor line 6 are mounted on the first support 3. The first conveyor line 5 and the second conveyor line 6 are vertically spaced and correspondingly arranged, with the second conveyor line 6 positioned above the first conveyor line 5. In specific applications, the product has outer packaging and can be extruded within a certain range. The relative positions of the first conveyor line 5 and the second conveyor line 6 can be adjusted to extrude a certain amount of pressure on the product. Specifically, the first lead screw adjustment assembly 4 is connected to the second conveyor line 6 and is used to adjust the vertical position of the second conveyor line 6. That is, the vertical position of the second conveyor line 6 can be adjusted through the first lead screw adjustment assembly 4. The first lead screw adjustment assembly 4 is a prior art component and may include adjustment... The structure includes a wheel and a lead screw. The adjusting wheel is connected to the lead screw, and the lead screw is equipped with a slider. The slider can be connected to the second conveyor line 6 so that the position of the second conveyor line 6 can be adjusted up and down. In order to make the up and down adjustment of the second conveyor line 6 stable, the second conveyor line 6 can slide up and down through the matching slide rail slider structure (that is, the air leakage extrusion mechanism can also include a slide rail slider and be set on the frame 1 and other components to facilitate the adjustment of the position of the second conveyor line 6). The first conveyor line 5 and the second conveyor line 6 are used to transport the extruded product to the pressure detection mechanism. The first conveyor line 5 and the second conveyor line 6 can both be conveyor lines, or the first conveyor line 5 can be a conveyor line and the second conveyor line 6 can be a non-powered driven line. The product is extruded through the first conveyor line 5 and the second conveyor line 6 of the air leakage extrusion mechanism.

[0031] Specific reference Figure 2The pressure detection mechanism of the present invention includes a second support 7, which is mounted on a frame 1. The second support 7 is equipped with a second lead screw adjustment assembly 8, a telescopic cylinder 9, a third conveyor line 10, a fourth conveyor line 11, and a pressure sensor 12. The third conveyor line 10 and the fourth conveyor line 11 are vertically spaced and correspondingly arranged, with the fourth conveyor line 11 positioned above the third conveyor line 10. The telescopic cylinder 9 is connected to the fourth conveyor line 11 and drives the fourth conveyor line 11 to move vertically. The second lead screw adjustment assembly 8 is connected to the telescopic cylinder 9 and is used to adjust the vertical position of the telescopic cylinder 9. The third conveyor line 10 and the fourth conveyor line 11 are used to transport the tested products to the product unloading machine. The pressure sensor 12 is mounted on the fourth conveyor line 11. In specific applications, the pressure of the product can be detected by adjusting the relative positions between the third conveyor line 10 and the fourth conveyor line 11. Specifically, the second lead screw adjustment assembly 8 is connected to the telescopic cylinder 9 and is used to adjust the vertical position of the telescopic cylinder 9. That is, the vertical position of the telescopic cylinder 9 can be adjusted by the second lead screw adjustment assembly 8. The second lead screw adjustment assembly 8 is a prior art structure that may include an adjustment wheel and a lead screw. The adjustment wheel is connected to the lead screw, and a slider is provided on the lead screw. The slider can be connected to the telescopic cylinder 9 so that the vertical position of the telescopic cylinder 9 can be adjusted. In order to make the vertical adjustment of the telescopic cylinder 9 stable... The telescopic cylinder 9 can slide up and down via a matching slide rail slider structure (that is, the pressure detection mechanism can also include a slide rail slider and be mounted on the frame 1 and other components to facilitate adjustment of the position of the telescopic cylinder 9). The third conveyor line 10 and the fourth conveyor line 11 are used to transport the pressure-detected product to the product unloading mechanism. The third conveyor line 10 and the fourth conveyor line 11 can both be conveyor lines, or the third conveyor line 10 can be a conveyor line and the fourth conveyor line 11 can be a non-powered driven line. The telescopic cylinder 9 can extend to press down the fourth conveyor line. The pressure sensor 12 on the fourth conveyor line 11 can detect and judge the pressure in real time. The pressure inside the product packaging is generally constant. If the product leaks air, the product will expel gas through the leak extrusion mechanism. At this time, the pressure detected by the pressure sensor 12 will be significantly lower than the constant range, indicating that the product is leaking air. The product feeding mechanism of the present invention includes a feeding conveyor line 13, which is installed on the frame 1 and is used for feeding. The defective product rejection mechanism includes a pushing cylinder 14 and a defective product collection box 15. The pushing cylinder 14 is located on one side of the feeding conveyor line 13 on the frame 1, and the defective product collection box 15 is located on the other side of the feeding conveyor line 13 on the frame 1 and is opposite to the pushing cylinder 14. After detecting a leaking product, the present invention determines it to be a defective product. The pushing cylinder 14 can be activated to push the product into the defective product collection box 15.

[0032] The product of this invention is squeezed between the first conveyor line 5 and the second conveyor line 6. If the product's packaging bag leaks air, the gas inside the packaging bag will decrease. Then, it passes through a pressure detection mechanism, which applies a fixed downward pressure. At the same time, the pressure sensor 12 detects the downward pressure value. If the detected pressure is too low, it indicates that the packaging bag is leaking air. This invention is based on dynamic pressure detection, that is, continuous pressure detection is performed on the first conveyor line 5, the second conveyor line 6, the third conveyor line 10, and the fourth conveyor line 11. The detection speed can reach 80-120 pieces / minute.

[0033] This embodiment does not impose any limitation on the shape, material, structure, etc. of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An airtightness testing device, characterized in that, include: frame; An air-leaking extrusion mechanism is mounted on a frame and used to extrude products; The pressure detection mechanism is mounted on the frame and is located adjacent to the air leakage extrusion mechanism. The pressure detection mechanism is used to detect the product pressure to determine whether the product packaging is damaged and leaking air. The product feeding mechanism is set on the frame and adjacent to the pressure detection mechanism. The product feeding mechanism is used for feeding, and the air leakage extrusion mechanism is also used to transport the extruded product to the pressure detection mechanism. The pressure detection mechanism is also used to transport the tested product to the product feeding mechanism.

2. The airtightness testing device according to claim 1, characterized in that: The air leakage extrusion mechanism includes a first bracket mounted on a frame. The first bracket is equipped with a first screw adjustment assembly, a first conveyor line, and a second conveyor line. The first and second conveyor lines are arranged vertically and vertically at intervals, with the second conveyor line located above the first conveyor line. The first screw adjustment assembly is connected to the second conveyor line and is used to adjust the vertical position of the second conveyor line. The first and second conveyor lines are used to transport the extruded product to the pressure detection mechanism.

3. The airtightness testing device according to claim 1, characterized in that: The pressure detection mechanism includes a second bracket mounted on a frame. The second bracket is equipped with a second lead screw adjustment assembly, a telescopic cylinder, a third conveyor line, a fourth conveyor line, and a pressure sensor. The third and fourth conveyor lines are vertically spaced and positioned correspondingly, with the fourth conveyor line located above the third. The telescopic cylinder is connected to the fourth conveyor line and drives its vertical displacement. The second lead screw adjustment assembly is connected to the telescopic cylinder and is used to adjust its vertical position. The third and fourth conveyor lines are used to transport the tested products to the product unloading mechanism. The pressure sensor is mounted on the fourth conveyor line.

4. The airtightness testing device according to claim 1, characterized in that: The product unloading mechanism includes an unloading conveyor line, which is installed on the frame for unloading materials.

5. The airtightness testing device according to claim 4, characterized in that: It also includes a defective product rejection mechanism, which includes a pusher cylinder and a defective product collection box. The pusher cylinder is located on one side of the machine frame loading and unloading conveyor line, and the defective product collection box is located on the other side of the machine frame loading and unloading conveyor line and is positioned opposite to the pusher cylinder.

6. The airtightness testing device according to claim 1, characterized in that: It also includes a display screen, which is mounted on a rack.

Images