Package vacuum sealing performance detection device

Abstract

The invention relates to the technical field of target material product packaging detection, and particularly discloses a packaging vacuum sealing performance detection device, which comprises a base, a vacuum cylinder, a top cover and a vacuum pump, and is characterized in that the vacuum cylinder is arranged on the base, and the top cover covers the vacuum cylinder to enable the vacuum cylinder to form a closed space; the base is provided with a deflation port and a vacuum extraction port which are communicated with the closed space, the deflation port is provided with an electromagnetic valve, and the vacuum extraction port is connected with the vacuum pump through a pipeline; the side wall of the vacuum cylinder is provided with a vacuum pressure transmitter interface, the vacuum pressure transmitter interface is provided with a vacuum pressure transmitter, the side, facing the closed space, of the top cover is provided with a magnetic attraction seat, the magnetic attraction seat is provided with a position sensor, and the top cover is provided with an observation window used for observing the closed space. The vacuum degree of the package can be effectively and rapidly detected, the detection qualification rate and reliability of the vacuum package are improved, the standing time is shortened, and the time and labor cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of target product packaging detection, and in particular to a packaging vacuum sealing detection device. Background Art

[0002] At present, vacuum packaging is widely used in industry, mainly in the fields of food, medicine, chemical industry, etc., with the advantages of high efficiency, automation, good sealing, etc. Vacuum packaging is to extract the air in the packaging container through the vacuum system to form a certain vacuum inside the packaging, and then quickly seal it to isolate the packaged items from the outside air, so as to achieve the purpose of preservation, moisture-proof, anti-oxidation, and anti-pollution. In fact, vacuum packaging is not completely vacuum, and the vacuum degree is usually between 600-1333Pa.

[0003] The vacuum packaging includes internal and external vacuuming. In the target material industry, vacuum packaging is the main packaging method, which is beneficial for anti-oxidation and anti-pollution. In general, the vacuum packaging method of the target material is internal vacuuming. The oblate vacuum nozzle is inserted into the inside of the package that needs to be vacuumed, and then the vacuum is pumped. When the vacuuming time is reached, the vacuum nozzle is quickly pulled out and sealed to make the inside of the package reach a vacuum state.

[0004] In product production, almost every target material needs to be vacuum packaged. However, vacuum packaging occasionally leaks, or the vacuum packaging is damaged by external forces during transportation, which will cause the product packaging to fail to play an anti-oxidation and anti-pollution role. Therefore, the current practice is to place each vacuum-packed product on the shelf in the warehouse and let it stand at room temperature of 25°C for 24-36 hours. It can only be shipped after there is no leakage. This results in a lot of time, labor and site costs from raw materials to finished products to shipment and then to customer site use. In addition, at the customer's site, since the sputtering time of each target material is long, the new target material is not put into production immediately. Some customers will even leave the target material for 3-6 months before putting it into production, so the reliability of vacuum packaging is a relatively important link. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to improve the detection qualification rate and reliability of vacuum packaging.

[0006] In order to solve the above technical problems, the present invention provides a packaging vacuum sealing detection device, including a base, a vacuum cylinder, a top cover and a vacuum pump, the vacuum cylinder is arranged on the base, and the top cover is arranged on the vacuum cylinder so that the vacuum cylinder forms a closed space; the base is provided with an air vent and a vacuum exhaust port connected to the closed space, the air vent is provided with a solenoid valve, and the vacuum exhaust port is connected to the vacuum pump pipeline; the side wall of the vacuum cylinder is provided with a vacuum pressure transmitter interface, the vacuum pressure transmitter interface is provided with a vacuum pressure transmitter, the top cover is provided with a magnetic seat on the side facing the closed space, the magnetic seat is installed with a position sensor, and the top cover is provided with an observation window for observing the closed space.

[0007] Further preferably, the base is also provided with a control panel, and the vacuum pump, vacuum pressure transmitter and position sensor are all electrically connected to the control panel; the control panel is provided with a touch screen, and the touch screen is configured to display the detection data of the vacuum pressure transmitter and the position sensor.

[0008] Further preferably, it also includes an emergency stop switch, a shutdown switch and a power switch, and the emergency stop switch, the shutdown switch and the power switch are all installed on the control panel.

[0009] Further preferably, an illumination lamp is provided on the inner wall of the vacuum cylinder.

[0010] Further preferably, the base is provided with a lamp interface and a position detection switch interface corresponding to the enclosed space, and the lamp interface and the position detection switch interface are both provided with a vacuum ceramic flange, the vacuum ceramic flange is electrically connected to the control panel, the lighting lamp is connected to the lamp interface, and the position sensor is connected to the position detection switch interface.

[0011] Further preferably, a sealing ring groove is provided on a side of the vacuum cylinder close to the top cover, a sealing ring is embedded in the sealing ring groove, and the top cover abuts against the sealing ring for sealing.

[0012] Further preferably, it further comprises a placement bracket, wherein the placement bracket is arranged at a side end of the base, and the placement bracket is used for placing the vacuum pump.

[0013] Further preferably, a handle is provided on a side of the top cover facing away from the sealed space.

[0014] Further preferably, support feet are provided at the bottom of the base.

[0015] Further preferably, the base, vacuum cylinder and top cover are all made of stainless steel.

[0016] Compared with the prior art, the present invention provides a packaging vacuum sealing detection device, which has the following beneficial effects:

[0017] The present invention provides a base, a vacuum cylinder and a top cover so that the three can be enclosed to form a closed space. When the vacuum degree of the product is tested, the top cover needs to be opened, the product is placed in the closed space and covered with the top cover, the vacuum pump is started, and the vacuum degree in the closed space is adjusted to a preset value by using a vacuum pressure transmitter. The vacuum pressure transmitter can measure the pressure in the closed space in real time. If the pressure in the closed space changes during the pressure holding stage, an alarm will be automatically sounded to stop the machine, and an abnormal packaging will be prompted. At the same time, a position sensor is used to detect the position of the product to determine whether the product packaging is deformed. If the packaging is not damaged, the position sensor will receive a proximity signal during vacuuming because the vacuum packaging is not completely vacuumed. On the contrary, the position sensor will receive a distance signal during inflation, indicating that the vacuum packaging is qualified. If the position sensor has no signal during vacuuming and inflation, it proves that the vacuum packaging is damaged and the machine will automatically stop. The vacuum packaging state in the closed space can also be observed through an observation window to avoid safety accidents. The invention can effectively and quickly detect the vacuum quality of the package, improve the detection qualification rate and reliability of the vacuum package, reduce the standing time, and reduce the time, manpower and site costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a packaging vacuum sealing detection device described in the present invention.

[0019] Figure 2 It is a structural diagram of a packaging vacuum sealing detection device from another perspective of the present invention.

[0020] Figure 3 The invention discloses a control circuit diagram of a packaging vacuum sealing detection device.

[0021] Figure 4 The present invention discloses a PLC digital quantity input circuit diagram of a packaging vacuum sealing detection device.

[0022] Figure 5 The present invention discloses a PLC digital quantity output circuit diagram of a packaging vacuum sealing detection device.

[0023] Figure 6 The present invention discloses a PLC analog quantity input circuit diagram of a packaging vacuum sealing detection device.

[0024] Reference numerals:

[0025] 10. Base; 101. Lighting interface; 102. Position detection switch interface; 103. Air release port; 104. Vacuum exhaust port; 105. Vacuum ceramic flange; 11. Control panel; 12. Touch screen; 13. Emergency stop switch; 14. Power off switch; 15. Power on switch; 16. Placement bracket; 17. Support feet;

[0026] 20. Vacuum cylinder; 21. Sealing ring groove; 22. Sealing ring; 23. Illuminating lamp; 24. Vacuum pressure transmitter interface;

[0027] 30. Top cover; 31. Observation window; 32. Handle; 33. Magnetic base. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0034] like Figure 1-Figure 2 As shown, this embodiment provides a packaging vacuum sealing detection device, including a base 10, a vacuum cylinder 20, a top cover 30 and a vacuum pump, the vacuum cylinder 20 is arranged on the base 10, and the top cover 30 is covered on the vacuum cylinder 20 so that the vacuum cylinder 20 forms a closed space; the base 10 is provided with a venting port 103 and a vacuum suction port 104 connected to the closed space, the venting port 103 is provided with a solenoid valve, and the vacuum suction port 104 is connected to the vacuum pump pipeline; the side wall of the vacuum cylinder 20 is provided with a vacuum pressure transmitter interface 24, the vacuum pressure transmitter interface 24 is provided with a vacuum pressure transmitter, and the top cover 30 is provided with a magnetic seat 33 on the side facing the closed space, and the magnetic seat 33 is installed with a position sensor; therefore, when the vacuum degree of the product is detected, the top cover 30 needs to be opened, Put the product into a confined space and cover it with a top cover 30, start the vacuum pump, and use the vacuum pressure transmitter to adjust the vacuum degree in the confined space to a preset value. The vacuum pressure transmitter can measure the pressure in the confined space in real time. If the pressure in the confined space changes during the pressure holding stage, it will automatically alarm and stop, and prompt that the packaging is abnormal; at the same time, use the position sensor to detect the position of the product to determine whether the product packaging is deformed. If the packaging is not damaged, when the air is pumped, the position sensor will receive a close signal because the vacuum packaging is not completely vacuumed; on the contrary, when the air is inflated, the position sensor will receive a far signal, which indicates that the vacuum packaging is qualified; if the position sensor has no signal during the air pumping and inflation, it proves that the vacuum packaging is damaged and automatically stops. The present invention can effectively and quickly detect the vacuum quality of the packaging, improve the detection qualification rate and reliability of the vacuum packaging, reduce the static time, and reduce the time, manpower and site costs.

[0035] It should be noted that the position sensor is arranged on the magnetic seat 33, and can detect whether the package is deformed in the height direction. If the package is not damaged, after the enclosed space is evacuated, because the vacuum package is not completely vacuumed, the pressure in the vacuum package is greater than the pressure in the enclosed space, and the package expands, so the position sensor will receive a proximity signal; conversely, when inflated, the pressure in the enclosed space is greater than the pressure in the vacuum package, and the position sensor will receive a distance signal, which indicates that the vacuum package is qualified.

[0036] In the above embodiment, the vacuum pressure transmitter interface 24 is connected to the vacuum cylinder 20 using a KF16 vacuum connector, and the vacuum exhaust port 104 is threadedly connected to the base 10 using an air pipe connector.

[0037] In the above embodiment, the magnetic base 33 is used to fix the position sensor by magnetic attraction, so as to facilitate the fixed installation of the position sensor. In other embodiments, the magnetic base 33 can also be replaced by a bracket to fix the position sensor.

[0038] In some embodiments, the diameter of the top cover 30 is preferably 450 mm, and the height of the vacuum cylinder 20 is 50 mm, which can match most circular planar targets. It should be noted that the above size limitation is only a preferred method. If a larger target needs to be detected, a larger confined space is required to match the target size.

[0039] In some embodiments, the top cover 30 is provided with an observation window 31 for observing the enclosed space, and the vacuum packaging state in the enclosed space can be observed through the observation window 31 to avoid safety accidents.

[0040] In some embodiments, the base 10 is also provided with a control panel 11, and the vacuum pump, vacuum pressure transmitter and position sensor are all electrically connected to the control panel 11; the control panel 11 is provided with a touch screen 12, and the touch screen 12 is configured to display the detection data of the vacuum pressure transmitter and the position sensor, so that the operation of the entire device can be controlled through the touch screen 12 and the real-time situation in the confined space can be fed back.

[0041] In some embodiments, the packaging vacuum sealing detection device also includes an emergency stop switch 13, a shutdown switch 14 and a power on switch 15. The emergency stop switch 13, the shutdown switch 14 and the power on switch 15 are all installed on the control panel 11 to control the start and stop of the packaging vacuum sealing detection device and perform an emergency stop operation in an emergency to avoid damage to the product or equipment and cause greater losses.

[0042] In some embodiments, an inner wall of the vacuum cylinder 20 is provided with an illumination lamp 23 , which can provide brightness for the enclosed space so that the staff can observe the vacuum packaging state in the enclosed space through the observation window 31 .

[0043] In some embodiments, the base 10 is provided with a lamp interface 101 and a position detection switch interface 102 corresponding to the enclosed space, and the lamp interface 101 and the position detection switch interface 102 are both provided with a vacuum ceramic flange 105, the vacuum ceramic flange 105 is electrically connected to the control panel 11, the lighting lamp 23 is connected to the lamp interface 101, and the position sensor is connected to the position detection switch interface 102; by providing the vacuum ceramic flange 105, the atmosphere can be effectively isolated to prevent external gas from entering the enclosed space and affecting the detection result, wherein the vacuum ceramic flange 105 is provided with pins, so that the vacuum ceramic flange 105 can realize power and signal transmission.

[0044] In some embodiments, a sealing ring groove 21 is provided on one side of the vacuum cylinder 20 close to the top cover 30, a sealing ring 22 is embedded in the sealing ring groove 21, and the top cover 30 is abutted against the sealing ring for sealing; the purpose of providing the sealing ring groove 21 and the sealing ring 22 is to enable the enclosed space to reach the desired vacuum degree when vacuuming.

[0045] In some embodiments, the packaging vacuum sealing detection device further includes a placement bracket 16, which is disposed at a side end of the base 10 to facilitate the placement and installation of the vacuum pump.

[0046] In some embodiments, a handle 32 is provided on the side of the top cover 30 facing away from the sealed space to facilitate the carrying of the top cover 30 .

[0047] In some embodiments, the packaging vacuum sealing detection device also includes support feet 17, which are arranged at the bottom of the base 10; preferably, there are at least 3 support feet 17, that is, the number of support feet 17 can be 3, 4, 5 or even more, to ensure stable support for the base 10 and ensure the accuracy and reliability of the detection.

[0048] In some embodiments, the base 10, vacuum cylinder 20 and top cover 30 are all made of stainless steel. The purpose is that stainless steel is corrosion-resistant, has good cleanliness, is not easy to introduce pollution, and reduces the manufacturing cost while meeting the performance requirements.

[0049] In some embodiments, the base 10 is used to place the product to be tested, and blocks are used to raise the position during testing to prevent the product from blocking the vacuum port 104 and damaging the circuit to cause a short circuit.

[0050] In some embodiments, the control panel 11 is provided with an electrical control system, which is mainly composed of a circuit breaker, a PLC, an analog input module, an intermediate relay, an AC contactor, etc. Among them, the circuit breaker is used to disconnect the power supply; the PLC is the core of the electrical control, which is used to collect data and control the actuator; the analog input module is used to collect the vacuum degree and displacement; the intermediate relay controls the on and off of the solenoid valve; and the AC contactor is used to control the vacuum pump. The connection relationship of each electrical component in this embodiment can be seen in Figure 3 The control circuit diagram of PLC digital input circuit is as follows Figure 4 , PLC digital output circuit such as Figure 5 , PLC analog input circuit such as Figure 6 .

[0051] It should be noted that each packaging material has a certain air permeability, which is the amount of gas that a unit area of ​​packaging material allows to pass through per unit time, usually expressed in cm. 3 / (m 2 ·24h). Air permeability is an important indicator to measure the gas barrier performance of packaging materials, which directly affects the packaging effect. In target packaging, the vacuum packaging bag is generally a nylon vacuum packaging bag (PA). Because of its material characteristics, the air permeability of nylon vacuum packaging bags (PA) is low. It is suitable for items that need to be stored for a long time, such as electronic components and hardware products, because of its good moisture resistance and not easy to age. The air permeability of its material is usually 0.1-10cm 3 / (m 2 ·24h). Because the gas in the package cannot be 100% extracted when the vacuum packaging machine is in operation, the gas in the package will affect the product, causing oxidation and moisture. In order to eliminate the influence of the package air permeability on the device of the present invention, the following test on air permeability was conducted: a 1L stainless steel sealed pressure container was used, and three openings were designed. Opening 1 was connected to a vacuum pressure transmitter, opening 2 was connected to a vacuum pump, and opening 3 was used to place items and a mirror. After the 5*5*5mm aluminum square was vacuum packaged, it was placed in a 1L stainless steel container. After sealing, vacuum was started to reach its ultimate vacuum degree of -75KPa. After standing for 24 hours, the value of the vacuum pressure transmitter was recorded every 30 minutes, and it was observed that the value rose slowly. Theoretically: According to Boyle's law P1 / P2=V2 / V1, the pressure is about 25KPa when the vacuum degree is reduced from the atmospheric pressure of 101.325KPa to -75KPa, because the volume of gas in a volume of 1L under an atmospheric pressure is 1L, that is, 0.001m 3 , so when the vacuum degree is -75KPa, the volume of gas in the container is 0.004m 3 When the pressure in the container rises from 25KPa to 30KPa, the gas content is 0.003m 3, the state of the gas changes. Under atmospheric pressure, the air is in a normal state. As the pressure decreases, the average distance between air molecules increases, causing the volume of the gas to expand. When the pressure drops from atmospheric pressure (about 101325Pa) to 25kpa (ie 0.025MPa), the distance between air molecules increases significantly, causing the volume of the remaining gas to increase relative to the original volume. According to the ideal gas state equation PV=nRT, when the temperature remains unchanged, the pressure P is inversely proportional to the volume V. Then when the pressure decreases, in order to keep the gas temperature unchanged, the volume must increase to accommodate the same number of gas molecules at a lower pressure. This proves that the gas in the package permeates out of the package, causing the pressure to rise and the gas volume to decrease. Combined with the above theory, when selecting packaging bags, the air permeability should be selected as 0.1-0.3cm 3 / (m 2 24h) packaging bag to avoid the vacuum packaging becoming ineffective due to long packaging time.

[0052] In addition, the packaging vacuum sealing detection device needs to detect the pressure rise rate before leaving the factory, and needs to be detected once a month during use. The pressure rise rate of the packaging vacuum sealing detection device is controlled to be no more than 2Pa / h during detection. Among them, the pressure rise rate refers to the difference in pressure increase in the vacuum system per unit time. It is an important indicator reflecting the performance of the vacuum system. Too high a pressure rise rate means that a large amount of impurity gas enters the system, which may come from the entry of external gas or the outgassing of the surface of the internal material of the system. During the use of the packaging vacuum sealing detection device, the pressure rise rate can feedback whether the vacuum packaging is reliable. Assuming that the vacuum packaging is good, the pressure rise rate will not change by more than 0.1Pa / S when the pressure is maintained. When the vacuum packaging fails, when the pressure is maintained, by calculating the pressure rise rate, there will be a change of more than 0.1Pa / S, which basically determines that the vacuum packaging is bad. The calculation formula of pressure rise rate: pressure rise rate = P2-P1 / t2-t1 (the vacuum degree is measured at two time points t1 and t2 in the no-load state, and the two values ​​of P1 and P2). Because the internal gas of the vacuum package cannot be completely extracted during packaging, there will be residual gas. If 1 liter of gas is added to 1L of easy, then the value read on the pressure gauge is about 1 bar (1 bar equals 0.1 MPa). Then, in this 1L of gas, 1mL of gas is released from the vacuum package, and the vacuum pressure transmitter in the container will have corresponding changes. According to the Clapeyron equation PV=nRT, the pressure will increase accordingly, so we can calculate that the vacuum transmitter will have a value change of about 100Pa.

[0053] The working principle of the present invention is as follows: under normal temperature, the vacuum-packed product is placed in the enclosed space of the packaging vacuum sealing detection device, the top cover 30 is closed, and the pumping time, deflation time and pressure holding time required for each test are input on the touch screen 12, and then the pumping and deflation time of each time is input into the device and the vacuum degree required for -70KPa is input, the vacuum pump limit vacuum of the device is -95KPa, the device is operated, and the packaging is observed through the observation window 31 to see if there is any deformation or leakage. The position sensor can always feedback whether the vacuum-packed product is deformed. The system automatically records and saves the data of the equipment's pumping and deflation. When pumping, the position sensor will receive a signal of approaching; when inflating, the position sensor has a signal of moving away, indicating that the vacuum packaging is intact. When the position sensor has no signal during pumping and inflating, it proves that the vacuum packaging is damaged and automatically stops. The vacuum pressure transmitter can measure the pressure in the cavity in real time. If there is a pressure change during the pressure holding stage (pressure holding is generally 10-60 seconds), the device will automatically alarm and stop, indicating that the packaging is abnormal.

[0054] Specifically, the present invention tests the vacuum sealing of the target material packaging through the following experiments:

[0055] First, at room temperature and pressure, 10 groups of vacuum packaging qualified packaging parameters that have been left to stand for 24-32 hours are used to vacuum pack 3 copper targets with a diameter of 200mm, named 1# copper target, 2# copper target, and 3# copper target. Use a 0.1mm needle to poke a small hole at the opening of the 1# copper target, and use a 0.05mm needle to poke a small hole at the opening of the 2# copper target. The 3# copper target is in a sealed state without rolling holes, but the heat sealing time is reduced. Put them into the packaging vacuum sealing detection device of the present invention respectively, use -70KPa, 20 seconds of vacuuming time, 20 seconds of pressure holding, 5 times of vacuuming, and turn on the device. After the device is turned on, vacuuming begins, and the vacuum packaging of the 1# copper target expands slightly, and the vacuum pressure transmitter alarms feedback during pressure holding. The 2# copper target is tested with the same parameters. The packaging is relatively swollen during the first vacuuming, and the vacuum pressure transmitter alarms feedback during pressure holding. The 3# copper target is also tested with the same parameters. After multiple vacuuming and deflation, until the second vacuuming, the packaging and packaging port breaks.

[0056] Conclusions of the above three tests: In the vacuum packaging tests of the three copper targets, under the same temperature, pressure and packaging parameters, there were vacuum leaks to varying degrees. The test time for copper target 1 was 20 seconds, the test time for copper target 2 was 20 seconds, and the test time for copper target 3 was 40 seconds.

[0057] 10 groups of vacuum packaging that have been left to stand for 24-32 hours and have passed the packaging parameters are used to package 3 copper targets, which are named 4# copper target, 5# copper target, 6# copper target, 7# copper target, and 8# copper target. Among them, 4# copper target and 5# copper target are subjected to airtightness test using the packaging vacuum sealing detection device of the present invention. The parameters used by 4# copper target are as follows: vacuuming time 20 seconds, vacuum degree -70 KPa, pressure holding time 20 seconds, and vacuum times 5 times; the parameters used by 5# copper target are as follows: vacuuming time 20 seconds, vacuum degree -70 KPa, pressure holding time 20 seconds, and vacuum times 5 times. The result is that the vacuum packaging state of 4# copper target is intact during the fifth vacuuming; and the vacuum packaging state of 5# copper target is intact during the fifth vacuuming. 6# copper target, 7# copper target and 8# copper target were subjected to static test, and 6# copper target failed. 7# copper target was pierced with 0.1mm small hole, and 8# copper target was pierced with 0.05mm small hole. The packaging status was observed and recorded every hour during the static test. After 36 hours of recording, there was no leakage in the packaging of 6# copper target, and the vacuum packaging was intact. The packaging of 7# copper target leaked after 5 hours of static, and the vacuum packaging failed. The packaging of 8# copper target failed after 8 hours. See Table 1 below for details.

[0058] Table 1 Target packaging vacuum sealing test record

[0059]

[0060] Conclusion: From Table 1, it can be seen that the detection parameters used in production meet the static requirements when the vacuum time is 20 seconds, the vacuum degree is -70KPa, and the pressure holding time is 20 seconds, which greatly shortens the static time. It proves that the invention can reduce the static time of vacuum packaging, and can also reduce time, manpower and site costs. Through the accumulation of a large amount of data experience, the equipment parameters of vacuum packaging can be improved and the qualified rate of vacuum packaging can be improved.

[0061] In summary, the embodiment of the present invention provides a packaging vacuum sealing detection device, which is provided with a base 10, a vacuum cylinder 20 and a top cover 30 so that the three can be enclosed to form a closed space. When the vacuum degree of the product is detected, the top cover 30 needs to be opened, the product is placed in the closed space and covered with the top cover 30, the vacuum pump is started, and the vacuum degree in the closed space is adjusted to a preset value by using a vacuum pressure transmitter. The vacuum pressure transmitter can measure the pressure in the closed space in real time. If the pressure in the closed space changes during the pressure holding stage, the device will automatically alarm and stop, and prompt that the packaging is abnormal; at the same time, the position sensor is used to detect the position of the product to determine whether the product packaging is deformed. If the packaging is not damaged, the position sensor will receive a close signal when the vacuum packaging is not completely vacuumed during the vacuum pumping; on the contrary, the position sensor will receive a far signal when the vacuum packaging is inflated, which indicates that the vacuum packaging is qualified; if the position sensor has no signal during the vacuum pumping and inflating, it proves that the vacuum packaging is damaged and the device will automatically stop; the vacuum packaging state in the closed space can also be observed through the observation window 31 to avoid safety accidents. The invention can effectively and quickly detect the vacuum quality of the package, improve the detection qualification rate and reliability of the vacuum package, reduce the standing time, and reduce the time, manpower and site costs.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present invention. The basic principles, main features and advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above preferred embodiments. The embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A packaging vacuum sealing detection device, characterized in that: It includes a base, a vacuum cylinder, a top cover and a vacuum pump, the vacuum cylinder is arranged on the base, and the top cover is arranged on the vacuum cylinder so that the vacuum cylinder forms a closed space; the base is provided with an air vent and a vacuum exhaust port connected to the closed space, the air vent is provided with a solenoid valve, and the vacuum exhaust port is connected to the vacuum pump pipeline; the side wall of the vacuum cylinder is provided with a vacuum pressure transmitter interface, the vacuum pressure transmitter interface is provided with a vacuum pressure transmitter, the top cover is provided with a magnetic seat on the side facing the closed space, the magnetic seat is installed with a position sensor, and the top cover is provided with an observation window for observing the closed space.

2. A packaging vacuum sealing detection device according to claim 1, characterized in that: The base is also provided with a control panel, and the vacuum pump, vacuum pressure transmitter and position sensor are all electrically connected to the control panel; the control panel is provided with a touch screen, and the touch screen is configured to display the detection data of the vacuum pressure transmitter and the position sensor.

3. A packaging vacuum sealing detection device according to claim 2, characterized in that: It also includes an emergency stop switch, a shutdown switch and a power switch, and the emergency stop switch, the shutdown switch and the power switch are all installed on the control panel.

4. A packaging vacuum sealing detection device according to claim 2, characterized in that: The inner wall of the vacuum cylinder is provided with an illumination lamp.

5. A packaging vacuum sealing detection device according to claim 4, characterized in that: The base is provided with a lamp interface and a position detection switch interface corresponding to the enclosed space, and the lamp interface and the position detection switch interface are both provided with a vacuum ceramic flange, the vacuum ceramic flange is electrically connected to the control panel, the lighting lamp is connected to the lamp interface, and the position sensor is connected to the position detection switch interface.

6. A packaging vacuum sealing detection device according to claim 1, characterized in that: A sealing ring groove is provided on one side of the vacuum cylinder close to the top cover, a sealing ring is embedded in the sealing ring groove, and the top cover abuts against the sealing ring for sealing.

7. A packaging vacuum sealing detection device according to claim 1, characterized in that: It also includes a placement bracket, which is arranged on the side end of the base and is used to place the vacuum pump.

8. A packaging vacuum sealing detection device according to claim 1, characterized in that: A handle is provided on the side of the top cover facing away from the sealed space.

9. A packaging vacuum sealing detection device according to claim 1, characterized in that: The bottom of the base is provided with supporting feet.

10. A packaging vacuum sealing detection device according to claim 1, characterized in that: The base, vacuum cylinder and top cover are all made of stainless steel.

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