Device for testing air density of packaging material

Abstract

The utility model belongs to the field of gas density testing, and particularly relates to a packaging material gas density testing device which comprises a base, a sealing barrel is fixedly mounted at the top of the base, a sealing cover is arranged at the top of the sealing barrel, a vacuum connector is communicated with the right side of the top of the sealing cover, and an adjusting knob is fixedly connected to the top of the sealing cover. The adjusting knob is rotationally connected with the sealing cover, a pressing plate is arranged in the sealing barrel, and the bottom of the adjusting knob is fixedly connected with an adjusting mechanism. Through the structural design of the pressing plate and the adjusting mechanism, when the water level is low, the adjusting knob can be rotated to enable the pressing plate to move downwards, after the pressing plate moves downwards, the packaging material can be pushed to completely enter the water, and when the water level is high, the adjusting knob is reversed to enable the pressing plate to move upwards to enable the packaging material to completely enter the water. And the pressing plate can be suitable for scenes with different water levels, and the applicability of the pressing plate is improved.

Description

Technical Field

[0001] The utility model relates to the field of air density testing, in particular to an air density testing device for packaging materials. Background Art

[0002] Packaging materials are used to protect the safety of goods, maintain their quality and extend their shelf life. In the food, pharmaceutical and cosmetic industries, the sealing performance of packaging materials is more important. These industries have strict requirements on the airtightness of packaging materials, because any tiny leakage may cause product deterioration, contamination or failure. The test of the airtightness of packaging materials requires the use of a vacuum seal tester. Through the airtightness test, the vacuum seal tester can timely discover potential problems of packaging materials, such as cracks, micropores, etc., so as to take corresponding measures to improve them. When the vacuum seal tester uses a vacuum pump to evacuate the test barrel, the gas pressure in the barrel will gradually decrease, while the external atmospheric pressure remains unchanged. As the vacuum degree in the barrel increases, the pressure difference between the barrel and the outside will also increase. At this time, the pressure in the barrel needs to be increased to reduce the pressure difference between the barrel and the outside, so as to achieve the effect of pressure relief and prevent water from being pumped out by the vacuum pump.

[0003] The existing vacuum sealing tester needs to immerse the packaging material in water during testing to facilitate observation during subsequent testing. The pressing plate is used to press the packaging material completely into the water, and the height of the pressing plate is generally not adjustable. In tests at different water levels, it cannot be guaranteed that the packaging material is completely pressed into the water, which will affect the air density detection of the packaging material. Therefore, a packaging material air density testing device is proposed to address the above problem. Utility Model Content

[0004] In order to make up for the shortcomings of the existing technology, the existing vacuum sealing tester needs to immerse the packaging material in water during testing to facilitate observation during subsequent testing. The pressing plate is used to press the packaging material completely into the water, and the height of the pressing plate is generally not adjustable. In tests at different water levels, it cannot be guaranteed that the packaging material is completely pressed into the water, which will affect the air density detection of the packaging material. The utility model proposes a packaging material air density testing device.

[0005] The technical solution adopted by the utility model to solve its technical problems is: the utility model is a packaging material air density testing device, comprising a base, a sealing barrel is fixedly installed on the top of the base, a sealing cover is arranged on the top of the sealing barrel, a vacuum joint is connected to the right side of the top of the sealing cover, an adjusting knob is fixedly connected to the top of the sealing cover, the adjusting knob is rotatably connected to the sealing cover, a pressure plate is arranged inside the sealing barrel, an adjusting mechanism is fixedly connected to the bottom of the adjusting knob, the adjusting mechanism can drive the pressure plate to move up and down, a pressure relief groove is opened on the top of the sealing cover, a sealing plate is arranged on the top of the pressure relief groove, and a pressure relief mechanism is fixedly connected to the bottom of the sealing plate.

[0006] Preferably, the adjustment mechanism comprises a first screw rod, the outer side of the first screw rod is threadedly connected to a first screw sleeve, the bottom of the first screw sleeve is fixedly connected to a fixing seat, and the fixing seat is fixedly connected to the top of the pressure plate.

[0007] Preferably, the pressure relief mechanism comprises a tension spring, the bottom of the tension spring is fixedly connected to a base plate, and the bottom of the base plate is rotatably connected to a second screw rod.

[0008] Preferably, the bottom of the second screw rod is threadedly connected with a second screw sleeve, and the bottom of the second screw sleeve is fixedly connected to the pressing plate.

[0009] Preferably, holes are opened inside the pressing plate, the number of the holes is several, and the several holes are evenly distributed.

[0010] Preferably, both sides of the top of the pressure plate are fixedly connected with a first sliding column, the top of the first sliding column is slidably connected with a second sliding column, and the top of the second sliding column is fixedly connected to the bottom of the sealing cover.

[0011] Preferably, a groove is provided at the bottom of the sealing plate, an annular convex plate is provided inside the groove, the annular convex plate is clearance-matched with the groove, and the bottom of the annular convex plate is fixedly connected to the top of the sealing cover.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model adopts the structural design of the pressing plate and the adjusting mechanism. When the water level is low, the adjusting knob can be turned to make the adjusting knob drive the screw to rotate, the screw drives the screw sleeve to move downward, and the screw sleeve drives the pressing plate to move downward. After the pressing plate moves downward, the packaging material can be pushed into the water completely. When the water level is high, the adjusting knob is reversed to move the pressing plate upward to make the packaging material completely enter the water. By adjusting the height of the pressing plate, it can be adapted to different water level scenes, thereby improving the applicability of the pressing plate.

[0014] 2. The utility model adopts the structural design of the pressure plate, the sealing plate and the pressure relief mechanism. When the pressure plate moves up and down, the base plate will be driven to move up and down. After the base plate moves up and down, the tension of the tension spring will also change. When the pressure plate moves upward, the distance between the tension spring and the base plate decreases, and the tension of the tension spring increases, so that the pressure relief threshold is increased. Conversely, when the pressure plate moves downward, the pressure relief threshold is reduced. The increase or decrease of the pressure relief threshold can be adapted to the use of different water levels. The pressure relief threshold can be adjusted simultaneously during the process of adjusting the pressure plate height, which can reduce the time for adjusting the pressure relief threshold separately and improve the practicability of the testing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the sealing barrel and the sealing cover of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the tension spring and the base plate of the utility model;

[0019] Figure 4 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0020] In the figure: 1. base; 2. sealing barrel; 3. sealing cover; 4. adjusting knob; 5. pressure plate; 601. first screw rod; 602. first screw sleeve; 603. fixing seat; 7. pressure relief groove; 8. blocking plate; 901. tension spring; 902. base plate; 903. second screw rod; 904. second screw sleeve; 10. hole; 11. first sliding column; 12. second sliding column; 13. groove; 14. annular convex plate; 15. vacuum joint. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 - Figure 4 As shown, a packaging material air density testing device comprises a base 1, a sealing barrel 2 is fixedly installed on the top of the base 1, a sealing cover 3 is arranged on the top of the sealing barrel 2, a sealing ring can be used between the sealing cover 3 and the sealing barrel 2 to enhance the sealing effect, a vacuum joint 15 is connected to the right side of the top of the sealing cover 3, an adjusting knob 4 is fixedly connected to the top center of the sealing cover 3, the adjusting knob 4 is rotatably connected to the sealing cover 3, a pressing plate 5 is arranged inside the sealing barrel 2, an adjusting mechanism is fixedly connected to the bottom of the adjusting knob 4, the adjusting mechanism can drive the pressing plate 5 to move up and down, two pressure relief grooves 7 are arranged on the top of the sealing cover 3, a sealing plate 8 is arranged on the top of the pressure relief groove 7, a sealing gasket can be installed on the bottom of the sealing plate 8 to improve the sealing effect between the sealing plate 8 and the pressure relief groove 7, a pressure relief mechanism is fixedly connected to the bottom of the sealing plate 8, and the pressure relief mechanism can reduce the pressure difference between the sealing barrel 2 and the outside when the pressure difference between the two is high;

[0023] Furthermore, the adjustment mechanism includes a first screw rod 601, the outer side of the first screw rod 601 is threadedly connected to a first screw sleeve 602, the bottom of the first screw sleeve 602 is fixedly connected to a fixing seat 603, and the fixing seat 603 is fixedly connected to the top of the pressing plate 5;

[0024] During operation, the pressure plate 5 is moved downward by turning the adjusting knob 4, and is moved upward by reversing the adjusting knob 4. The up and down movement of the pressure plate 5 can adapt to the use of different water levels in the sealing barrel 2, so that the packaging material can be completely pressed into the water, which is convenient for subsequent air tightness testing.

[0025] Furthermore, the pressure relief mechanism includes a tension spring 901, the top of the tension spring 901 is fixedly connected to the blocking plate 8, the bottom of the tension spring 901 is fixedly connected to a base plate 902, and the bottom of the base plate 902 is rotatably connected to a second screw 903;

[0026] Furthermore, the bottom of the second screw 903 is threadedly connected with a second screw sleeve 904, and the bottom of the second screw sleeve 904 is fixedly connected to the pressing plate 5. After the second screw 903 is rotated forwards and backwards, the second screw 903 can be moved upward or downward, and the overall length of the second screw 903 and the second screw sleeve 904 will change accordingly, thereby adjusting the initial tension of the tension spring 901, thereby improving the applicability of the tension spring 901;

[0027] During operation, when the adjusting knob 4 is used to drive the pressure plate 5 to move up and down, the up and down movement of the pressure plate 5 will drive the base plate 902 to move up and down. After the base plate 902 moves up and down, the tension of the tension spring 901 will change accordingly. When the pressure plate 5 moves upward, the tension of the tension spring 901 increases, thereby increasing the pressure relief threshold. Conversely, when the pressure plate 5 moves downward, the pressure relief threshold decreases. The increase or decrease of the pressure relief threshold can be adapted to the use of different water levels. The pressure relief threshold is adjusted simultaneously during the process of adjusting the height of the pressure plate 5, which can reduce the time for adjusting the pressure relief threshold separately and improve the practicality of the testing device.

[0028] Furthermore, the pressing plate 5 is provided with holes 10 in its interior, the number of the holes 10 is several, and the several holes 10 are evenly distributed;

[0029] During operation, the plurality of holes 10 facilitate water flow upwardly out of the pressing plate 5 after the pressing plate 5 enters the water, thereby preventing the water flow from flowing from both sides of the pressing plate 5 and pushing the packaging material to slide to both sides.

[0030] Further, both sides of the top of the pressing plate 5 are fixedly connected with first sliding columns 11, the number of the first sliding columns 11 is two, and the two first sliding columns 11 are symmetrically distributed on the top of the pressing plate 5, and the top of the first sliding column 11 is slidably connected with a second sliding column 12, and the top of the second sliding column 12 is fixedly connected to the bottom of the sealing cover 3;

[0031] During operation, the first sliding column 11 and the second sliding column 12 cooperate with each other to limit the upward and downward movement of the pressing plate 5 , thereby making the upward and downward movement of the pressing plate 5 more stable.

[0032] Furthermore, a groove 13 is formed at the bottom of the sealing plate 8, and an annular convex plate 14 is disposed inside the groove 13. The annular convex plate 14 is clearance-matched with the groove 13, and the bottom of the annular convex plate 14 is fixedly connected to the top of the sealing cover 3;

[0033] During operation, the cooperation between the groove 13 and the annular convex plate 14 can enhance the sealing effect of the sealing plate 8 on the sealing cover 3 , thereby preventing gas from leaking from the gap when the sealing plate 8 seals the pressure relief groove 7 .

[0034] Working principle: First, open the sealing cover 3 upwards, put the packaging material into the sealing barrel 2, and pour some water, then clamp the sealing cover 3 on the sealing barrel 2, and the pressing plate 5 presses the packaging material completely into the water, then the vacuum joint 15 on the top of the sealing cover 3 is connected to an external vacuum pump, and then the vacuum pump is started to extract the air in the sealing barrel 2, and then observe the situation of the packaging material in the water, and judge its air density by the generation of bubbles and the changes of the packaging material;

[0035] During the detection, the water level in the sealed barrel 2 is different. When the water level is low, the adjusting knob 4 can be turned to make the adjusting knob 4 drive the screw to rotate, and the screw drives the screw sleeve to move downward, and the screw sleeve drives the pressing plate 5 to move downward. After the pressing plate 5 moves downward, it can push the packaging material into the water completely. When the water level is high, the adjusting knob 4 is reversed to move the pressing plate 5 upward to make the packaging material completely enter the water. By adjusting the height of the pressing plate 5, it can be adapted to different water level scenes, thereby improving the applicability of the pressing plate 5. In the process of the pressing plate 5 moving up and down, the second screw 903 can be used , the second screw sleeve 904 pushes the base plate 902 to move up and down. After the base plate 902 moves up and down, the distance between it and the sealing plate 8 is adjusted. After the distance changes, the tension of the tension spring 901 will also change. When the pressure plate 5 moves upward, the distance between the tension spring 901 and the base plate 902 decreases, and the tension of the tension spring 901 increases, so that the pressure relief threshold is increased. Conversely, when the pressure plate 5 moves downward, the pressure relief threshold is reduced. The increase or decrease of the pressure relief threshold can adapt to the use of different water levels. The pressure relief threshold is adjusted simultaneously during the process of adjusting the height of the pressure plate 5, which can reduce the time for adjusting the pressure relief threshold separately and improve the practicability of the testing device.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A packaging material air density testing device, characterized in that: The invention comprises a base (1), a sealing barrel (2) is fixedly mounted on the top of the base (1), a sealing cover (3) is arranged on the top of the sealing barrel (2), a vacuum joint (15) is connected to the right side of the top of the sealing cover (3), an adjusting knob (4) is fixedly connected to the top of the sealing cover (3), the adjusting knob (4) is rotatably connected to the sealing cover (3), a pressing plate (5) is arranged inside the sealing barrel (2), an adjusting mechanism is fixedly connected to the bottom of the adjusting knob (4), the adjusting mechanism can drive the pressing plate (5) to move up and down, a pressure relief groove (7) is opened on the top of the sealing cover (3), a sealing plate (8) is arranged on the top of the pressure relief groove (7), and the pressure relief mechanism is fixedly connected to the bottom of the sealing plate (8).

2. The packaging material air tightness testing device according to claim 1, characterized in that: The adjustment mechanism comprises a first screw rod (601), the outer side of the first screw rod (601) is threadedly connected to a first screw sleeve (602), the bottom of the first screw sleeve (602) is fixedly connected to a fixing seat (603), and the fixing seat (603) is fixedly connected to the top of the pressing plate (5).

3. A packaging material air tightness testing device according to claim 2, characterized in that: The pressure relief mechanism comprises a tension spring (901), the bottom of the tension spring (901) is fixedly connected to a base plate (902), and the bottom of the base plate (902) is rotatably connected to a second screw rod (903).

4. A packaging material air tightness testing device according to claim 3, characterized in that: The bottom of the second screw rod (903) is threadedly connected to a second screw sleeve (904), and the bottom of the second screw sleeve (904) is fixedly connected to the pressing plate (5).

5. The packaging material air tightness testing device according to claim 4, characterized in that: The pressing plate (5) is provided with holes (10) inside, the number of the holes (10) is a plurality, and the plurality of the holes (10) are evenly distributed.

6. The packaging material air tightness testing device according to claim 5, characterized in that: Both sides of the top of the pressure plate (5) are fixedly connected to first sliding columns (11), the top of the first sliding column (11) is slidably connected to a second sliding column (12), and the top of the second sliding column (12) is fixedly connected to the bottom of the sealing cover (3).

7. The packaging material air tightness testing device according to claim 6, characterized in that: The bottom of the blocking plate (8) is provided with a groove (13), the interior of the groove (13) is provided with an annular convex plate (14), the annular convex plate (14) is clearance-matched with the groove (13), and the bottom of the annular convex plate (14) is fixedly connected to the top of the sealing cover (3).

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