Vacuum sealing performance tester

Abstract

The utility model discloses a vacuum sealing performance tester which comprises a testing machine table, a sealing assembly and a vacuumizing assembly, the sealing assembly comprises a top cover, a bottom cover and a hollow cylinder body, and a sealing space used for placing articles is defined by the top cover, the bottom cover and the cylinder body. The air exhaust end of the vacuumizing assembly is connected with the top cover, and the vacuumizing assembly is used for vacuumizing the sealed space; a water inlet assembly used for draining water into the sealed space is further arranged on the testing machine table, and a drainage valve communicated with the sealed space is arranged in the center of the bottom of the bottom cover. According to the utility model, the water inlet assembly used for supplying water to the sealing assembly is designed on the testing machine table, an external water source can be pumped into the sealing space through the water pump, automatic water adding operation is realized, the drainage valve at the bottom is opened during drainage, and meanwhile, when materials which can seep out and cannot be discharged through the drainage valve exist in the sealing assembly, the sealing assembly is closed. The bottom cover can be directly screwed out for cleaning, and the whole transparent tank does not need to be detached for cleaning, so that the operation is safer while more labor is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing detection, in particular to a vacuum sealing performance tester. Background Art

[0002] Vacuum packaging refers to a packaging method in which items are placed in a packaging bag, and then the air in the bag is extracted through a vacuum device to form a near-vacuum state inside the bag and seal it. However, in order to ensure that the quality of the vacuum packaging of items meets the requirements, items are generally sampled for vacuum sealing performance testing after vacuum packaging. Among them, a vacuum sealing performance tester is required to test the sealing performance of item packaging under vacuum conditions.

[0003] At present, vacuum sealing performance testers mainly include machines, transparent cans, vacuum equipment, etc. Before conducting sealing performance testing, water needs to be added into the transparent can manually. After the test, since the items may seep out of the packaging bag, in order to avoid affecting subsequent tests, the internal water needs to be poured out manually. Since the transparent can is heavy after being filled with water, the process of filling and pouring water will consume more manpower and is also prone to safety accidents. Utility Model Content

[0004] The purpose of the present utility model is to provide a vacuum sealing performance tester in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention is as follows: a vacuum sealing performance tester, including a testing machine, a sealing assembly and a vacuum pumping assembly, wherein the sealing assembly includes a top cover, a bottom cover and a hollow cylinder, and a sealed space for placing items is formed between the top cover, the bottom cover and the cylinder, and the air suction end of the vacuum pumping assembly is connected to the top cover for pumping the sealed space into a vacuum; the testing machine is also provided with a water inlet assembly for draining water into the sealed space, and a drainage valve connected to the sealed space is provided at the bottom center of the bottom cover, the inner end surface of the top of the bottom cover is provided with an internal thread, and the outer end surface of the bottom of the cylinder is provided with an external thread compatible with the internal thread.

[0006] In a preferred embodiment, the vacuum pump assembly includes a vacuum pump and an exhaust pipeline. The vacuum pump is installed on the test machine, and both ends of the exhaust pipeline are connected to the vacuum pump and the top cover respectively.

[0007] In a preferred embodiment, the water inlet assembly includes a water pump and a water inlet pipeline, both ends of the water inlet pipeline are connected to the cylinder and the water pump respectively, and an electric control valve and a flow meter are provided on the water inlet pipeline.

[0008] In a preferred embodiment, a connecting rod extending downward is integrally provided at the bottom of the top cover, a pressing plate is integrally provided at the bottom of the connecting rod, the diameter of the pressing plate is the same as the inner diameter of the cylinder, and a plurality of through holes are provided on the pressing plate.

[0009] In a preferred embodiment, the top cover is provided on the top of the cylinder, a sealing ring is provided on the top of the cylinder that is in close contact with the inner wall of the top cover, and a handle is integrally provided at the center of the top of the top cover.

[0010] In a preferred embodiment, a positioning ring is protruded from the outer peripheral surface of the lower side of the cylinder, and a mounting frame is provided on the top of the test machine. The mounting frame has a mounting hole with the same outer diameter as the cylinder, the positioning ring is overlapped on the top of the mounting frame, and the side of the mounting frame has a slot for moving the bottom cover out.

[0011] In a preferred embodiment, a plurality of supporting feet are provided circumferentially on the bottom of the bottom cover, and the bottom of the supporting feet is lower than the bottom of the drain valve.

[0012] In a preferred embodiment, a silicone sealing ring is embedded in the top surface of the bottom cover, and an interference seal is formed between the bottom cover and the cylinder body through the silicone sealing ring.

[0013] In a preferred embodiment, the top cover is further provided with an air pressure sensor electrically connected to the testing machine.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0015] 1. In the utility model, a water inlet assembly for supplying water to the sealing assembly is designed on the test machine. The external water source can be pumped into the sealed space through the water pump to realize automatic water adding operation. When draining, just open the drain valve at the bottom. At the same time, when there is material that will seep out of the sealing assembly but cannot be discharged through the drain valve, the bottom cover can be directly unscrewed for cleaning without removing the entire transparent tank for cleaning, which is more labor-saving and safer to operate.

[0016] 2. In the present invention, a flow meter is designed on the water inlet assembly to achieve quantitative water addition operation and avoid waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the internal structure of the utility model as a whole;

[0018] Figure 2 This is a schematic diagram of the overall front plan structure of the utility model;

[0019] Figure 3 for Figure 1Schematic diagram of the enlarged structure at point A in the middle.

[0020] Markings in the figure: 1-testing machine, 2-vacuum pump, 3-exhaust pipeline, 4-top cover, 41-handle, 42-connecting rod, 43-pressure plate, 5-air pressure sensor, 6-sealing ring, 7-water inlet pipeline, 8-flow meter, 9-electrically controlled valve, 10-water pump, 11-water pump, 12-drain valve, 13-positioning ring, 14-bottom cover, 15-support foot, 16-internal thread, 17-silicone sealing ring, 18-mounting frame. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Reference Figure 1-3 A vacuum sealing performance tester includes a test machine 1 (connected to an external power supply or AC power), a sealing component, and a vacuum pumping component. The sealing component includes a top cover 4, a bottom cover 14, and a hollow cylinder 11. The top cover 4, the bottom cover 14, and the cylinder 11 form a sealed space for placing items. The vacuum pumping end of the vacuum pumping component is connected to the top cover 4 to evacuate the sealed space. The test machine 1 is also provided with a water inlet component for draining water into the sealed space. The bottom center of the bottom cover 14 is provided with a drain valve connected to the sealed space. The door 12 and the inner end surface of the top of the bottom cover 14 are provided with an internal thread 16, and the outer end surface of the bottom of the cylinder 11 is provided with an external thread that is compatible with the internal thread 16. When it is necessary to change the water in the sealing component, just open the drain valve 12 at the bottom. At the same time, when there is material in the sealing component that will seep out but cannot be discharged through the drain valve 12, the bottom cover 14 can be directly unscrewed for cleaning, without the need to remove the entire transparent tank for cleaning. It is more labor-saving and safer to operate. When adding water later, the bottom cover 14 is screwed back onto the cylinder 11.

[0023] The drainage end of the drainage valve 12 can be connected to an external drainage hose, and the top cover 4, the bottom cover 14 and the cylinder 11 are all made of transparent materials, such as glass, plastic, etc.

[0024] Furthermore, the vacuum assembly includes a vacuum pump 2 and an air extraction pipeline 3. The vacuum pump 2 is mounted on the test machine 1. The two ends of the air extraction pipeline 3 are connected to the vacuum pump 2 and the top cover 4, respectively. The top cover 4 is also equipped with an air pressure sensor 5 electrically connected to the test machine 1. The air pressure sensor 5 can monitor the air pressure within the sealed space in real time to determine whether the sealed space is in a vacuum state. The vacuum pump 2 is electrically connected to the test machine 1. During testing, the vacuum pump 2 is used. The test machine 1 is equipped with an operation button and a display instrument showing the air pressure value. The vacuum pump 2 is a dual-purpose vacuum pump for both pumping and filling. After vacuum packaging is completed, it can inflate the interior to prevent the negative pressure from making the top cover 4 difficult to open.

[0025] Furthermore, the water inlet component includes a water pump 10 and a water inlet pipe 7. The two ends of the water inlet pipe 7 are respectively connected to the cylinder 11 and the water pump 10. The external water source can be pumped into the sealing component through the water pump 10 to realize automatic water adding operation. The external water source is such as a water tank, a tap water pipe, etc., and the water pump 10 can be connected to an external water inlet pipe.

[0026] Among them, an electric control valve 9 and a flow meter 8 are provided on the water inlet pipeline 7, and a flow meter 8 is designed on the water inlet component to realize quantitative water addition operation and avoid waste of water resources.

[0027] Furthermore, a connecting rod 42 extending downward is provided at the bottom of the top cover 4, and a pressure plate 43 is provided at the bottom of the connecting rod 42. The diameter of the pressure plate 43 is the same as the inner diameter of the cylinder 11, and a plurality of through holes are provided on the pressure plate 43. The water level needs to be around the position of the pressure plate 43 (preferably the water level is slightly higher than the pressure plate 43) so that the pressure plate 43 can completely press the floating packaging bag under the water surface to ensure the accuracy of the detection.

[0028] Furthermore, the top cover 4 is arranged on the top of the cylinder 11, and a sealing ring 6 is provided on the top of the cylinder 11, which is tightly attached to the inner wall of the top cover 4. A handle 41 is integrally provided at the center of the top of the top cover 4. The sealing ring 6 can improve the sealing of the connection between the cylinder 11 and the top cover 4, and the problem of gas leakage can be avoided as much as possible.

[0029] Furthermore, a plurality of support feet 15 are provided around the bottom of the bottom cover 14 , the bottom of the support feet 15 is lower than the bottom of the drain valve 12 , and a silicone sealing ring 17 is embedded in the top surface of the bottom cover 14 , and an interference seal is formed between the bottom cover 14 and the cylinder body 11 through the silicone sealing ring 17 .

[0030] Further, the outer peripheral surface of the lower side of the cylinder body 11 is protruded to form a positioning ring 13, and the top of the test platform 1 is provided with a mounting frame 18, the mounting frame 18 has a mounting hole with the same outer diameter as the cylinder body 11, the positioning ring 13 is overlapped on the top of the mounting frame 18, and the side of the mounting frame 18 has a slot position for moving out the bottom cover 14. Through the cooperation of the mounting frame 18 and the positioning ring 13, the cylinder body 11 can be fixed above the test platform 1, and there is a height difference between the test platform 1 and the cylinder body 11, so as to facilitate the disassembly and assembly operation of the bottom cover 14.

[0031] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vacuum sealing performance tester, characterized in that: The utility model comprises a testing machine, a sealing component and a vacuum pumping component, wherein the sealing component comprises a top cover, a bottom cover and a hollow cylinder, the top cover, the bottom cover and the cylinder together form a sealed space for placing items, the suction end of the vacuum pumping component is connected to the top cover, and is used to evacuate the sealed space; the testing machine is also provided with a water inlet component for draining water into the sealed space, the bottom center of the bottom cover is provided with a drain valve connected to the sealed space, the inner end surface of the top of the bottom cover is provided with an internal thread, and the outer end surface of the bottom of the cylinder is provided with an external thread adapted to the internal thread.

2. A vacuum sealing performance tester according to claim 1, characterized in that: The vacuum pump assembly includes a vacuum pump and an air extraction pipeline. The vacuum pump is installed on the test machine. The two ends of the air extraction pipeline are respectively connected to the vacuum pump and the top cover.

3. A vacuum sealing performance tester according to claim 1, characterized in that: The water inlet assembly includes a water pump and a water inlet pipeline. Both ends of the water inlet pipeline are connected to the cylinder and the water pump respectively. An electric control valve and a flow meter are provided on the water inlet pipeline.

4. A vacuum sealing performance tester according to claim 1, characterized in that: A connecting rod extending downward is integrally provided at the bottom of the top cover, and a pressing plate is integrally provided at the bottom of the connecting rod. The diameter of the pressing plate is the same as the inner diameter of the cylinder, and a plurality of through holes are provided on the pressing plate.

5. The vacuum sealing performance tester according to claim 1, wherein: The top cover is arranged on the top of the cylinder body. The top of the cylinder body is provided with a sealing ring that is tightly attached to the inner wall of the top cover. The center of the top of the top cover is integrally provided with a handle.

6. A vacuum sealing performance tester according to claim 1, characterized in that: A positioning ring is protruding from the outer peripheral surface of the lower side of the cylinder, and a mounting frame is provided on the top of the test machine. The mounting frame has a mounting hole with the same outer diameter as the cylinder, the positioning ring is overlapped on the top of the mounting frame, and the side of the mounting frame has a slot to meet the needs of moving the bottom cover out.

7. The vacuum sealing performance tester according to claim 1, wherein: A plurality of supporting feet are provided around the bottom of the bottom cover, and the bottom of the supporting feet is lower than the bottom of the drain valve.

8. The vacuum sealing performance tester according to claim 1, wherein: A silicone sealing ring is embedded on the top surface of the bottom cover, and interference sealing is achieved between the bottom cover and the cylinder body through the silicone sealing ring.

9. The vacuum sealing performance tester according to claim 1, wherein: The top cover is also provided with an air pressure sensor electrically connected to the testing machine.

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