Inflatable food package leak detection device

Abstract

The utility model relates to an inflatable food package leak detection device, which comprises a base frame, and a sample placing table, a lifting mechanism, a leak detection cavity and a control cabinet which are arranged on the base frame, the leakage detection cavity comprises a cavity body, the bottom of the cavity body is an open end, the open end is in sealing connection with a flexible corrugated rubber ring, and the flexible corrugated rubber ring is used for being in sealing fit with the sealing ring of the storage groove, so that the cavity body forms a sealed cavity body; a shell of the cavity is of a double-layer structure and comprises a hard outer shell and a porous inner shell, and an air exhaust channel is formed between the hard outer shell and the porous inner shell; a sealing adapter and a one-way gulp valve are arranged at the top of the cavity, and the sealing adapter communicates with the air exhaust channel and is used for being connected with a vacuum pump; the one-way gulp valve is communicated with the exhaust channel; a pressure sensor and a gas sensor are arranged on the inner side wall of the hard shell, the pressure sensor is used for detecting the pressure in the cavity, and the gas sensor is used for detecting whether gas in the inflatable food package to be detected exists in the cavity or not. According to the utility model, nondestructive food package leak detection is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of packing leak detection, and particularly relates to an aerated food packing leak detection device. BACKGROUND

[0002] In order to prevent food from being mildewed and deteriorated, prolong the shelf life, and ensure that the food can withstand the turnover of each link of transportation, storage, distribution and retail, the food is usually sealed and stored by inflation. However, the food is prone to leak sealing, pressure penetration, sealing wrinkles or cracks and micro-holes in the packaging material during the packaging process, which causes the aerated packaging to leak. The aerated food packaging leakage not only causes the packaging to deform, but also affects the taste and safety of the food. Therefore, the detection of the sealing property of the food packaging cannot be underestimated.

[0003] At present, the sealing property detection of the aerated food packaging mainly adopts the traditional water bath detection: the sample to be detected is submerged in a water tank and is pumped to a certain vacuum, and whether there is leakage is judged by observing whether continuous bubbles appear in the water. In the actual operation process, the water bath detection has many problems: if there is a small leakage in the packaging and it is not detected, but during the water bath detection, water may have been osmosed into the packaging, accelerating the corrosion and deterioration of the food; the water bath detection not only needs to prepare enough and clean water before testing, but also needs to pump the water to a vacuum, and the test water must be replaced regularly, which consumes a lot of time and energy, and becomes a pain point in the food leak detection industry. Therefore, a device for quickly and non-destructively detecting the sealing property of the food packaging is urgently needed. SUMMARY

[0004] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the purposes of the utility model is to solve one or more of the above-mentioned problems in the prior art, in other words, one of the purposes of the utility model is to provide an aerated food packaging leak detection device that meets one or more of the above-mentioned needs.

[0005] In order to achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions:

[0006] An aerated food packaging leak detection device, comprising a base frame, a sample placement table, a lifting mechanism, a leak detection chamber and a control cabinet mounted on the base frame; the sample placement table is used for placing the aerated food packaging to be detected, the lifting mechanism is used for driving the leak detection chamber to descend to sealingly cooperate with the sample placement table, so as to detect whether the aerated food packaging to be detected leaks by the leak detection chamber; the lifting mechanism, the leak detection chamber and the control cabinet are signal connected;

[0007] The sample placing table has a placing groove, and the placing groove is provided with a sealing ring; the leak detection cavity comprises a cavity body, the bottom of the cavity body is an open end, the open end is sealingly connected with a flexible corrugated rubber ring, the flexible corrugated rubber ring is used for sealing cooperation with the sealing ring of the placing groove, so that the cavity body forms a sealed cavity; the shell of the cavity body is a double-layer structure comprising a hard shell and a porous inner shell, and an air extraction channel is formed between the hard shell and the porous inner shell;

[0008] The top of the cavity body is provided with a sealing adapter and a one-way air supplement valve, the sealing adapter is in communication with the air extraction channel, and the sealing adapter is used for being connected with a vacuum pump; the one-way air supplement valve is in communication with the air extraction channel and is used for supplementing air;

[0009] The inner side wall of the hard shell is provided with a pressure sensor and a gas sensor, the pressure sensor is used for detecting the pressure in the cavity body, and the gas sensor is used for detecting whether the gas in the to-be-tested aerated food packaging exists in the cavity body.

[0010] As a preferred solution, the base frame comprises a base and a support column, the sample placing table and the lifting mechanism are mounted on the support column, and the lifting mechanism is located above the sample placing table.

[0011] As a preferred solution, the support column is a lifting column.

[0012] As a preferred solution, the bottom of the base is provided with a roller, and the roller is provided with a brake pad.

[0013] The base is also provided with a handrail.

[0014] As a preferred solution, the lifting mechanism comprises a mounting frame and a gas cylinder, one end of the mounting frame is fixedly connected with the top end of the support column, the other end is provided with a vertically downward telescopic gas cylinder, and the telescopic gas cylinder is drivingly connected with the top of the leak detection cavity.

[0015] As a preferred solution, the control cabinet is provided with an alarm, and the alarm is used for alarming when detecting that the to-be-tested aerated food packaging leaks.

[0016] As a preferred solution, the gas sensor is a carbon dioxide sensor, a nitrogen sensor or an oxygen sensor, and is selected according to the inflation of the aerated food packaging.

[0017] As a preferred solution, the control cabinet is provided with a display screen.

[0018] As a preferred solution, the cavity body is semispherical.

[0019] As a preferred solution, both sides of the sample placing table are respectively provided with detachable inclined plates, and the detachable inclined plates are respectively used for butt joint with the conveying belt.

[0020] The base frame is provided with a driving motor and a mechanical arm, the driving motor is used for driving the mechanical arm, so as to drive the inflatable food package to be detected on the conveying belt to move to the storage groove of the sample placing table through the detachable inclined plate on one side, and after the detection is completed, the inflatable food package in the storage groove is driven to move to the conveying belt through the detachable inclined plate on the other side.

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] (1) The hard shell of the leak detection cavity is made of hard material, which is beneficial to keeping the original shape of the inflatable food package to be detected during detection, avoiding deformation of the package due to vacuum extrusion, and damaging the quality of the package contents; the bottom of the leak detection cavity is provided with a flexible corrugated rubber ring, which deforms when the cavity is pumped to vacuum, and is beneficial to tightly combining the leak detection cavity and the sample placing table to form a self-sealing vacuum cavity;

[0023] (2) The utility model realizes non-destructive food package leak detection, which can be offline or online, greatly improving the leak detection efficiency;

[0024] (3) The leak detection cavity and the sample placing table can be replaced, and the appropriate size of the leak detection cavity is selected according to the size of the inflatable food package, so as to reduce the detection time and improve the detection efficiency;

[0025] (4) The height of the leak detection cavity and the sample placing table can be adjusted, and the base is in the form of a trolley, which is suitable for more detection environments, especially different online detection environments. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the structure schematic view of the inflatable food package leak detection device of the embodiment 1 of the utility model;

[0027] Figure 2 is the half cut structure schematic view of the leak detection cavity of the embodiment 1 of the utility model;

[0028] Figure 3 is the structure schematic view of the inflatable food package leak detection device of the embodiment 2 of the utility model. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the utility model, the specific implementation ways of the utility model will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings and other implementation ways can be obtained by those skilled in the art without creative labor.

[0030] Embodiment 1:

[0031] As Figure 1As shown, the air-filled food packaging leak detection device of the embodiment includes a base frame 1, a sample placement platform 2, a lifting mechanism 3 and a control cabinet 4 installed on the base frame 1. The control cabinet 4 is responsible for controlling the control system of the entire air-filled food packaging leak detection device, which includes a central controller, a vacuum system, an alarm system, a sensing system and a liquid crystal display 5. The central controller is the core and coordinates the control of each system module. The central controller is in communication connection with the vacuum system, the alarm system, the sensing system and the liquid crystal display 5. The central controller is installed in the control cabinet 4, the liquid crystal display 5 is installed in the center of the front panel of the control cabinet 4, the vacuum system is installed at the end of the lifting mechanism 3, and the sensing system is installed at the end of the vacuum system.

[0032] Specifically, the base frame 1 of the embodiment includes a base 6 and a support column 7. The bottom of the support column 7 is fixedly connected with the base 6 and is provided with a reinforcing rib. The support column 7 is telescopic and adjustable, that is, a lifting column. The bottom of the base 6 is provided with four rollers 8 with brake pads 9. The rear side of the base 6 is provided with a handrail 10, which facilitates the pushing of the entire device.

[0033] The sample placement platform 2 of the embodiment is fixedly installed on the support column 7. The center of the sample placement platform 2 is provided with a circular object placing groove 11, and the inside of the groove 11 is provided with a sealing ring. The circular object placing groove 11 is used for placing carbon dioxide filled packaging food.

[0034] The lifting mechanism 3 of the embodiment includes a gas cylinder 14 and a gas cylinder mounting bracket 15. One end of the gas cylinder mounting bracket 15 is fixedly connected with the top end of the support column 7, and the other end is provided with a vertically downward gas cylinder 14. The gas cylinder 14 is provided with a piston rod. The piston rod penetrates through the side wall of the gas cylinder mounting bracket 15, and the end of the piston rod is provided with a leak detection cavity 16.

[0035] The vacuum system of the embodiment includes the leak detection cavity 16, a vacuum pipe 17 and a vacuum pump. The vacuum pump is arranged in the control cabinet 4. Figure 2 As shown, the main body of the leak detection cavity 16 is divided into an upper chamber 19 and a lower chamber 20 from top to bottom. The upper chamber 19 is a semicircular cavity made of hard material. The lower chamber 20 is a flexible corrugated rubber ring. The size of the chamber bottom matches the shape and size of the groove 11 of the sample placement platform. The flexible corrugated rubber ring is in sealing cooperation with the sealing ring inside the groove 11. When the leak detection cavity 16 is evacuated, the external atmospheric pressure is greater than the internal pressure of the chamber. The corrugated rubber contracts longitudinally. The gas cylinder 14 further drives the upper chamber 19 to tightly adhere to the sealing ring of the sample placement platform 2, forming a self-sealing vacuum cavity.

[0036] The upper layer 19 of the leak detection chamber in this embodiment is a double-layer structure, the inner layer 21 is a porous mesh structure, and the outer layer 22 is a chamber shell. The outer layer 22 and the inner layer 21 form an air extraction channel 23 therebetween. A through hole 24 is formed in the center of the top of the outer layer 22 of the leak detection chamber, and the through hole 24 is connected with the vacuum pipe 17 through a sealing adapter 25. The other end of the vacuum pipe 17 is connected with a vacuum pump. The leak detection chamber 16 is lifted and lowered by the lifting mechanism 3. A one-way air supplement valve 26 is arranged on the upper part of the outer layer 22 of the leak detection chamber and close to the through hole 24. When the detection is completed, the one-way air supplement valve 26 is opened to supplement air to the inside of the leak detection chamber 16 to normal pressure. The lifting mechanism 3 lifts the leak detection chamber 16 to take out the sample of the inflatable food packaging to be detected.

[0037] The alarm system in this embodiment includes an alarm lamp 27 arranged on the right top of the control cabinet 4. When the packaging is unqualified, the alarm lamp 27 will flicker and emit an alarm sound.

[0038] The sensing system in this embodiment includes a pressure sensor 28 and a carbon dioxide sensor 18. Both the pressure sensor 28 and the carbon dioxide sensor 18 are arranged in the inside of the top end of the chamber shell 22 to detect the pressure change and the carbon dioxide concentration change in the sealed chamber and transmit the signals to the central controller.

[0039] The working process of the inflatable food packaging leak detection device in this embodiment is as follows: the carbon dioxide inflatable food packaging is placed in the circular placement groove 11 on the sample placement platform 2. The manual detection on the liquid crystal display screen 5 is selected. The central controller controls the lifting mechanism 3 to be started to make the leak detection chamber 16 to be lowered to be attached to the sample placement platform 2. Then, the central controller controls the vacuum system to be started to make the vacuum degree of the vacuum chamber to reach the set value and keep the vacuum degree for 5-20 seconds (the vacuum degree required by different packaging is slightly different). At the same time, the sensing system is started to detect the carbon dioxide tracer gas. The detection result is transmitted to the central controller. The detection result is converted into the leak rate (i.e. the carbon dioxide leakage concentration) and displayed on the liquid crystal display screen 5. If the leak rate is less than the set value, the packaging is qualified. The alarm lamp 27 of the alarm system controlled by the central controller flickers green light without emitting sound. When the leak rate is greater than the set value, the alarm lamp 27 of the alarm system flickers red light and emits an alarm sound, which lasts until the measurement is completed. After the sensing system is detected, the central controller starts the one-way air supplement valve 26 to supplement air to the vacuum chamber to normal pressure. The lifting mechanism 3 is started to lift the leak detection chamber 16 to take out the sample. The measurement is completed. The next sample is manually replaced.

[0040] Embodiment 2:

[0041] The inflatable food packaging leak detection device in this embodiment is different from that in Embodiment 1 in that the automatic detection is realized.

[0042] As Figure 3As shown, the air-filled food packaging leak detection device of the present embodiment has the same device main body structure as that in Embodiment 1, except that an automatic sample transmission structure is added on the sample placement platform on the basis of the original structure. The automatic sample transmission structure includes an inclined plate 12, a driving motor 29 and a mechanical arm 30. The inclined plate 12 is detachably fixed on the conveying belt 13. The sample is pushed from the production line conveying belt 13 to the sample placement platform by the cooperation of the driving motor 29 and the mechanical arm 30. After the detection is completed, according to the detection result, the unqualified sample is removed from the production line conveying belt 13 by the cooperation of the driving motor 29 and the mechanical arm 30, so as to avoid entering the next process.

[0043] The working process of the air-filled food packaging leak detection device of the present embodiment is as follows: adjust the device position, cooperate the inclined plate 12 with the production line conveying belt 13, select the automatic detection on the liquid crystal display screen, control the mechanical arm to start and push the sample from the production line conveying belt 13 to the sample placement platform by the central controller, control the lifting mechanism to start and make the leak detection cavity descend and adhere to the sample placement platform, then start the vacuum system to make the vacuum cavity reach the set value and keep the vacuum degree for 5-20 seconds (the vacuum degree required by different packaging is slightly different), at the same time, start the sensing system to detect the carbon dioxide tracer gas, the detection result is transmitted to the central controller, and the detection result is converted into the leak rate and displayed on the liquid crystal display screen. If the detection leak rate is less than the set value, the packaging is qualified, the alarm light of the alarm system only flashes green light without sound, the central controller controls the one-way air supplement valve to start and supplement air to the vacuum cavity to normal pressure, the lifting mechanism is started to lift the leak detection cavity, the mechanical arm directly pushes the sample back to the production line conveying belt, the sample enters the production line one-step process, and the detection device enters the next measurement cycle. When the leak rate is greater than the set value, the packaging is unqualified, the alarm light of the alarm system flashes red light and emits an alarm sound, the central controller controls the one-way air supplement valve to start and supplement air to the vacuum cavity to normal pressure, the lifting mechanism is started to lift the self-sealing leak detection cavity, the mechanical arm directly pushes the sample away from the production line conveying belt 13, so as to avoid the sample entering the next process of the production line, and the measurement device enters the next measurement cycle. The interval time between two measurements can be set on the liquid crystal display screen, so as to cooperate with the conveying speed of the production line.

[0044] Embodiment 3:

[0045] The air-filled food packaging leak detection device of the present embodiment is different from that of Embodiment 1 in that:

[0046] The carbon dioxide sensor can be adjusted according to the different types of inflation in food packaging, for example, it can be replaced by a nitrogen sensor or an oxygen sensor to meet the needs of different applications;

[0047] The other structures can refer to Embodiment 1 or 2.

[0048] The above only is to the preferred embodiment and principle of the utility model has carried on the detailed explanation, for the ordinary skilled person in the art, according to the thought provided by the utility model, there will be change in specific implementation, and these changes should be considered as the protection scope of the utility model.

Claims

1. An apparatus for detecting leaks in an aerated food package, comprising: The base frame comprises a base and a sample placement table, a lifting mechanism, a leak detection cavity and a control cabinet mounted on the base; the sample placement table is used for placing a to-be-tested aerated food packaging; the lifting mechanism is used for driving the leak detection cavity to descend to sealingly cooperate with the sample placement table, so as to detect whether the to-be-tested aerated food packaging leaks through the leak detection cavity; The lifting mechanism, the leak detection cavity and the control cabinet are signal connected; The sample placement table has a storage groove, and the storage groove is provided with a sealing ring; the leak detection cavity comprises a cavity body, the bottom of the cavity body is an open end, and the open end is sealingly connected with a flexible corrugated rubber ring; the flexible corrugated rubber ring is used for sealingly cooperating with the sealing ring of the storage groove, so as to form a sealed cavity body; the shell of the cavity body is a double-layer structure comprising a hard outer shell and a porous inner shell, and an air extraction channel is formed between the hard outer shell and the porous inner shell; The top of the cavity body is provided with a sealing adapter and a one-way air supplement valve; the sealing adapter is in communication with the air extraction channel and is used for being connected with a vacuum pump; the one-way air supplement valve is in communication with the air extraction channel and is used for supplementing air; The inner side wall of the hard outer shell is provided with a pressure sensor and a gas sensor; the pressure sensor is used for detecting the pressure in the cavity body; and the gas sensor is used for detecting whether there is gas in the to-be-tested aerated food packaging in the cavity body.

2. The leak detection apparatus for aerated food packaging according to claim 1, wherein The base frame comprises a base and a support column mounted on the base; the sample placement table and the lifting mechanism are mounted on the support column, and the lifting mechanism is located above the sample placement table.

3. The leak detection apparatus for aerated food packaging according to claim 2, wherein The support column is a lifting column.

4. The leak detection apparatus for aerated food packaging according to claim 2, wherein The bottom of the base is provided with a roller, and the roller is provided with a brake pad; The base is further provided with a handrail.

5. The leak detection apparatus for aerated food packaging according to claim 2, wherein The lifting mechanism comprises a mounting frame and a pneumatic cylinder; one end of the mounting frame is fixedly connected with the top end of the support column, and the other end is provided with a vertically downward telescopic pneumatic cylinder; and the telescopic pneumatic cylinder is drivingly connected with the top of the leak detection cavity.

6. The leak detection apparatus for aerated food packaging according to any one of claims 1 to 5, wherein The control cabinet is provided with an alarm; the alarm is used for alarming when detecting that the to-be-tested aerated food packaging leaks.

7. The leak detection apparatus for aerated food packaging according to any one of claims 1 to 5, wherein The gas sensor is a carbon dioxide sensor, a nitrogen sensor or an oxygen sensor, which is selected according to the inflation of the aerated food packaging.

8. The leak detection apparatus for aerated food packaging according to any one of claims 1 to 5, wherein The control cabinet is provided with a display screen.

9. The leak detection apparatus for aerated food packaging according to any one of claims 1 to 5, wherein The cavity body is semispherical.

10. The leak detection apparatus for aerated food packages according to any one of claims 1-5, characterized in that, Both sides of the sample placement table are respectively provided with detachable inclined plates; the detachable inclined plates are respectively used for being connected with a conveying belt; The base frame is provided with a driving motor and a mechanical arm; the driving motor is used for driving the mechanical arm to drive the to-be-tested aerated food packaging of the conveying belt to move to the storage groove of the sample placement table through the detachable inclined plates, and to drive the aerated food packaging in the storage groove to move to the conveying belt through the other detachable inclined plate after detection is completed.

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