Inflation pressure-resistant air tightness automatic test equipment and test method

Abstract

The invention relates to the technical field of bag air tightness testing, in particular to an inflation pressure-resistant air tightness automatic testing device and a testing method, the inflation pressure-resistant air tightness automatic testing device comprises a box body, an air inlet pipe and a first pressure gauge are arranged in the box body, an air pipe is communicated with the first pressure gauge, and the inflation pressure-resistant air tightness automatic testing device is characterized by further comprising a second pressure gauge arranged on one side of the first pressure gauge and connected with the first pressure gauge; air inlet pipes corresponding to the second pressure gauge are arranged in the box body, and the two air inlet pipes operate independently; the two air outlet pipes are arranged on the two opposite side walls of the box body, one ends of the two air outlet pipes extend into the box body and communicate with the first pressure gauge and the second pressure gauge correspondingly, and the other ends of the two air outlet pipes are free ends and used for communicating with a packaging bag; the conveying belt is horizontally arranged below the box body and conveys packaging bags, the belt face of the conveying belt is arranged below the pipe opening of the air outlet pipe, and a lifting mechanism is arranged on the conveying belt. The packaging bag airtightness detection device has the effects of improving the packaging bag airtightness detection efficiency and reducing the packaging bag airtightness detection time consumption.

Description

Technical Field

[0001] The present application relates to the field of bag air tightness testing technology, and in particular to an automatic air tightness testing device and a testing method for inflation and pressure resistance. Background Art

[0002] Food packaging is an essential step in the production and processing of food, which places strict requirements on the airtightness of packaging bags, especially for fresh meat, seafood and other perishable foods, which need to be sealed to extend the shelf life. Therefore, it is necessary to use packaging bags with good airtightness. For packaging bags, sealing performance is the most important performance parameter. In addition to the freshness and quality of food, it can also prevent food leakage and contamination to ensure food safety. Therefore, after the packaging bags are produced, they need to be tested for airtightness, that is, a preset number of bags are drawn from a single batch of packaging bags to represent the airtightness of the entire batch of packaging bags.

[0003] Currently, packaging bag manufacturers use a specific airtight detection device and a gas leakage detection method to measure whether the internal pressure of the packaging bag has changed. If the pressure does not drop significantly, it means that the sealing performance of the sealed packaging bag is good. The inflation blasting method is used to continuously inflate the interior of the packaging bag until the pressure limit of the packaging bag is reached and the inflation is maintained. The pressure limit of the packaging bag is recorded when the packaging bag explodes.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the existing gas leakage measurement devices have a low degree of automation and can only be manually operated by technicians to perform two airtightness detection processes in sequence. Summary of the invention

[0005] In order to improve the efficiency of air tightness detection of packaging bags and reduce the time consumption of air tightness detection of packaging bags, the present invention provides an automatic air tightness testing device and a testing method for inflation and pressure resistance.

[0006] On the one hand, the present invention provides an inflatable pressure-resistant airtightness automatic testing device adopts the following technical solution: An inflatable pressure-resistant air tightness automated testing device comprises a box body, wherein an air inlet pipe and a first pressure gauge are arranged in the box body, wherein the air pipe is connected to the first pressure gauge, and wherein the device further comprises: A second pressure gauge is arranged on one side of the first pressure gauge, an air intake pipe is arranged inside the box corresponding to the second pressure gauge, and the two air intake pipes operate independently; Two air outlet pipes are provided on two opposite side walls of the box body, one end of each of the air outlet pipes extends into the interior of the box body and is respectively connected to the first pressure gauge and the second pressure gauge, and the other end is a free end for connecting to a packaging bag; The conveyor belt is horizontally arranged below the box body to convey the packaging bags, and its belt surface is arranged below the outlet pipe opening. The conveyor belt is provided with a lifting mechanism.

[0007] By adopting the above technical solution, air pressure bearing is the main reference standard for testing the pressure bearing capacity of sealed bags. Therefore, in addition to the traditional test of gas leakage within a preset time period, it is necessary to add an additional pressure gauge and air pipe for the pressure bearing limit test of the packaging bag. In addition to the pressure bearing limit test of the packaging bag, it can ensure that the food in the bag is fully protected under normal conditions. In the above scheme, the box body is the main structural part, and the internal space of the box body is mainly used to accommodate the first pressure gauge, the second pressure gauge, the outlet pipe, the pipe body and the valve part of the inlet pipe, and the box body plays a role in protecting the internal structural parts; in the above scheme, an improvement is made on the traditional first structural part, a second pressure gauge for air pressure testing is added, and the second pressure gauge is adapted to set the inflation pipe and the outlet pipe for the gas delivery channel, which is equivalent to adding an additional set of air pressure detection components to the traditional scheme; the two sets of air pressure components are used simultaneously and independently for the air tightness and pressure resistance detection of the packaging bag, which improves the deficiency that the technicians in the traditional scheme can only detect one by one; In order to improve the traditional manual installation and startup detection method, a conveyor belt is set under the box in the above scheme. The technicians place the packaging bags of corresponding models on the conveyor belt surface in sequence, and cooperate with the lifting components on the conveyor belt surface to lift the packaging bags and connect them to the pipe mouth of the outlet pipe to realize automatic detection.

[0008] Optionally, the clamping rollers are arranged horizontally, two of the clamping rollers form a group, and multiple groups of the clamping rollers are distributed at equal intervals along the length direction of the conveyor belt to form a belt surface structure, and driving members are arranged at both ends of the clamping rollers to drive the clamping rollers to rotate; A test chamber is arranged at the top of the conveyor belt corresponding to the two air outlet pipes, and the lifting mechanism is arranged in the test chamber; and a refrigeration component is connected in the test chamber.

[0009] By adopting the above technical solution, automatic conveying is realized. The clamping rollers are evenly spaced along the belt surface of the conveyor belt. The roller surfaces of the clamping rollers constitute the belt surface of the conveyor belt. The above technicians place the bag body of the packaging bag between each group of clamping rollers. The clamping rollers clamp the bag body of the packaging bag. After conveying to the test chamber, each group of clamping rollers rotates in the opposite direction to move the bag body upward, so that the bag mouth of the packaging bag can be connected to the pipe mouth of the air outlet pipe. Since the packaging bag has a large surface area and a light weight, the above-mentioned test chamber can provide an independent and sealed testing environment for the packaging bag, thereby preventing the bag from being unstable due to external interference during the test, reducing the sealing between the air outlet pipe and the packaging bag, and thus affecting the test results; In addition, the bag may occasionally explode during the test process, but the test chamber can be used to isolate the environment to avoid injuring surrounding technicians.

[0010] Optionally, the lifting assembly includes: The lifting rod is horizontally arranged inside the test chamber, and a driving member for driving the lifting rod is arranged on the side wall of the test chamber; the lifting rod body is vertically penetrated with a through hole adapted to the bag opening of the packaging bag; the free end of the air outlet pipe extends into the lifting rod and is plugged into the bag opening of the packaging bag.

[0011] By adopting the above technical scheme, the main structure of the lifting assembly of the lifting rod body is an auxiliary assembly that assists the lifting rod in docking the outlet pipe mouth and the bag mouth of the packaging bag. When the above-mentioned clamping roller transports the packaging bag to the test chamber, the packaging bag is transported upward along with the clamping roller, and the lifting rod moves downward to make the bag mouth part of the packaging bag plug into the perforated part of the lifting rod, and the perforation plays a restraining role. After the bag body of the packaging bag is separated from the clamping roller, a supporting force is applied above the bag body to prevent the bag body from tilting; after the perforation is plugged into the bag mouth of the packaging bag, the mouth of the air outlet pipe moves downward to plug into the bag mouth of the packaging bag for inflation.

[0012] Optionally, the lifting rod is provided with a sealing member on the perforated hole wall to seal the connection portion between the air outlet pipe opening and the packaging bag opening.

[0013] By adopting the above technical solution, inaccurate measurements caused by gas leakage during air tightness and pressure resistance testing of packaging bags can be avoided, and the seal must remain sealed and fitted when measuring the overall air tightness of a single packaging bag.

[0014] Optionally, a plurality of the test chambers are arranged above the conveyor belt, and the plurality of the test chambers are evenly distributed on both sides of the box body; a plurality of the air outlet pipes, the first pressure gauge, and the second pressure gauge are arranged corresponding to each of the test chambers.

[0015] By adopting the above technical solution, multiple test chambers are distributed on both sides of the box and the conveyor belt. In actual application, it is recommended that no more than three test chambers are used on each side; multiple test chambers can simultaneously perform air tightness and pressure resistance measurements on multiple packaging bags, thereby improving test efficiency; Before starting the air tightness and pressure resistance testing process, the technicians only need to arrange the packaging bags to be measured in order.

[0016] On the one hand, the present invention provides an air tightness test method for inflation pressure resistance, which adopts the following steps: An air tightness test method for inflation pressure resistance, applied to the test equipment; The test method includes: Sequentially clamping a plurality of packaging bags between a plurality of groups of clamping rollers, and controlling the clamping rollers to run along the direction of the conveyor belt; The clamping roller conveys the packaging bag to the test chamber, and one packaging bag corresponds to one test chamber; The lifting rod is controlled to move downward, and at the same time, the clamping roller rotates to drive the packaging bag to move upward, and the lifting rod is perforated and plugged into the bag opening of the packaging bag; The outlet pipe opening is plugged into the bag opening of the packaging bag to seal the bag opening; the outlet pipe opening inflates air into the packaging bag.

[0017] By adopting the above steps, the automated conveying of the testing device is realized; in actual testing, comparative testing is usually required, and the air tightness and pressure resistance tests of packaging bags of various materials are carried out at the same time; therefore, for testing the corresponding packaging bag body, the technicians need to sequentially turn the bag opening of each packaging bag upward, and squeeze the bag body between each set of clamping rollers, with the bag opening height not higher than the bottom height of the side wall of the test chamber, so that the bag opening can enter the test chamber; The clamping roller clamps the packaging bag and conveys the packaging bag to the test chamber along the conveying direction of the conveyor belt. There is no need for technicians to manually connect the bag opening of the packaging bag and the lifting rod inside the test chamber. They just control the lifting rod to move down, perforate the bag opening, and then move the outlet pipe down to stably insert the bag opening.

[0018] Based on this, the outlet pipe part is plugged in Optionally, the following steps are also included: S1: Inflation: During the process of the air outlet pipe inflating the packaging bag, the first pressure gauge and the second pressure gauge are observed and data are recorded; when the pressure rise rate begins to decrease, inflation is stopped and the bag opening of the packaging bag is kept sealed; S2: Pressure holding: Leave the packaging bag still for a preset period of time, observe the first pressure gauge and the second pressure gauge corresponding to the packaging bag, and judge the pressure holding performance of the sealed bag by the displayed values ​​and the change range; S3: Cooling: Maintaining the pressure value, controlling the refrigeration unit to operate, lowering the internal temperature of the test chamber to a preset temperature, maintaining the temperature for a preset period of time, and observing the first pressure gauge and the second pressure gauge corresponding to the packaging bag; or, The order of S2 and S3 is swapped.

[0019] By adopting the above steps, the air tightness of the packaging bag can be effectively tested; the gas pressure release within the preset time period can be observed to indirectly determine whether the sealing of the packaging bag is good. Considering that the sealed bag needs to be placed in a refrigerated environment for a long time in actual applications, in addition to the traditional inflation and pressure maintenance process, a cooling process is added to reduce the ambient temperature in the test chamber, and the pressure maintenance process is measured at different temperatures; Alternatively, the pressure-maintaining process can be carried out first, and then the temperature can be lowered after the preset period of time to observe the pressure change. Both measurement schemes can be used to test the air tightness of the packaging bag more comprehensively and intuitively.

[0020] Optionally, the following steps are also included: S1: Inflation, the air outlet pipe continuously inflates the packaging bag; when the pressure rise rate begins to decrease, the inflation is stopped, and the pressure values ​​of the first pressure gauge and the second pressure gauge are recorded; S2: Burst test: After recording is completed, continue to inflate the packaging bag until the packaging bag bursts, and record the critical burst pressure of the first pressure gauge and the second pressure gauge; judge whether the packaging bag is qualified by comparing the ideal burst pressure with the actual recorded value; S3: Cooling: The clamping roller is output, and the packaging bag of the same type is replaced in the test chamber. After the temperature inside the test chamber is cooled to a preset temperature, steps S1 and S2 are repeated.

[0021] By adopting the above technical solution, the pressure resistance of the packaging bag can be effectively tested. Similar to the above air tightness test, the ultimate pressure bearing capacity at low temperature can ensure the strength of the packaging bag at low temperature.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting up two independently operated air inlet pipes and corresponding pressure gauges, the real-time monitoring and data recording of the internal pressure of the packaging bag can be achieved during the inflation process, which effectively solves the problem of low efficiency of existing equipment when testing a single sample on a single workbench, and significantly improves the detection speed and accuracy; 2. The design of the conveyor belt and lifting mechanism enables the packaging bags to enter the testing position continuously and automatically, further improving the production efficiency of the testing equipment and meeting the continuous operation requirements on the production line; 3. With the refrigeration parts and test chamber, air tightness test can be carried out in normal temperature and low temperature environment, which expands the application scope of the equipment. It is especially suitable for test scenarios that need to simulate temperature changes in actual use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0024] Figure 2 It is a structural diagram designed to highlight the box body in the embodiment of the present application.

[0025] Figure 3 It is a structural schematic diagram of a conveyor frame in an embodiment of the present application.

[0026] Figure 4 It is a structural schematic diagram made to highlight the interior of the test chamber in the embodiment of the present application.

[0027] Figure 5 It is a structural schematic diagram designed to highlight the lifting rod in the embodiment of the present application.

[0028] Explanation of the reference numerals: 1. box body; 11. box body bracket; 12. first pressure gauge; 13. second pressure gauge; 14. air outlet pipe; 15. conveying frame; 151. chain; 16. clamping roller; 17. mounting block; 2. test chamber; 21. lifting rod; 211. perforation; 212. sealing block. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] First, the embodiment of the present application discloses an airtight automatic testing device capable of inflating and withstanding pressure. Figure 1 An inflatable pressure-resistant airtightness automated testing device comprises a box body 1 and a box body 1 bracket arranged below the box body 1. The top of the box body 1 bracket is fixedly connected to the box body 1 to play a supporting role.

[0031] Reference Figure 1 and Figure 2 , a test assembly for air tightness and pressure resistance test of packaging bags is arranged inside the box 1, and the air tightness and pressure resistance test assembly is protected by the shell structure. The test assembly inside the box 1 includes a group of first pressure gauges 12 and a group of second pressure gauges 13, and each group of pressure gauges includes two vertically distributed pressure gauges, wherein the two first pressure gauges 12 are arranged on one side of the box 1, and the two second pressure gauges 13 are distributed symmetrically with the two first pressure gauges 12 along the center of the box 1, and the instrument panels of the two first pressure gauges 12 and the two second pressure gauges 13 are fixed to the outer wall of the box 1, and the measuring end is arranged inside the box 1; the box 1 is provided with an inlet corresponding to each first pressure gauge 12 and each second pressure gauge 13. The air pipe is used to transport air to the first pressure gauge 12 and the second pressure gauge 13. A section of the air pipe close to the first pressure gauge 12 and the second pressure gauge 13 extends out of the box body 1, and then re-enters the box body 1 and extends to the two opposite side walls of the box body 1. A valve is set corresponding to each first pressure gauge 12 and the second pressure gauge 13 on the part of the air pipe extending out of the box body 1. The airflow flows from the air intake pipe through the first pressure gauge 12 and the second pressure gauge 13 to the valve. The opening and closing of the valve is used to control the flow of the airflow in the air intake pipe toward the rear. The air inlet pipe inside the box body 1 extends to the two opposite side walls of the box body 1, and the extended side is the adjacent side of the box body 1 where the first pressure gauge 12 and the second pressure gauge 13 are set. For the convenience of representation, the part of the air inlet pipe extending out of the box body 1 is the air outlet pipe 14; the tube body part of the air outlet pipe 14 is a preset length, and the end of the air outlet pipe 14 away from the box body 1 is used to plug into the bag mouth part of the packaging bag. The air flow is injected into the packaging bag through the air inlet pipe, the first pressure gauge 12 or the second pressure gauge 13, the valve, and the air outlet pipe 14. When the packaging bag is swollen, the technician observes the air pressure in the packaging bag by observing the indications of the first pressure gauge 12 and the second pressure gauge 13.

[0032] Reference Figure 1 and Figure 3 , a conveying frame 15 is arranged on both sides of the box body 1, the height of the conveying frame 15 is lower than the height of the bracket of the box body 1, the length directions of the two conveying frames 15 are parallel, the two conveying frames 15 and the box body 1 are arranged in the same plane, and the two conveying frames 15 are connected to each other with chains 151 on both sides of the length direction, and the chains 151 are driven by motors and gears. Since this is a prior art, it will not be described in detail. The two chains 151 are arranged in parallel, and multiple connecting blocks are fixed on the two chains 151. The multiple connecting blocks are arranged at relative positions of the chains 151. The two connecting blocks at relative positions of the two chains 151 form a group, and each group of connecting blocks is rotatably connected with two clamping rollers 16. The roller surfaces of the two clamping rollers 16 are set with a spacing, or a preset distance, and a micro motor is arranged at the end of each clamping roller 16 to drive the clamping roller 16 to rotate; each group of clamping rollers 16 is evenly spaced along the transmission direction of the chain 151 to form a conveyor belt, and the roller surface of each clamping roller 16 forms the belt surface of the conveyor belt. The clamping roller 16 is used to clamp the uninflated packaging bag.

[0033] In other embodiments, the connection blocks may also correspond one-to-one to the clamping rollers 16 , that is, each group of connection blocks includes four connection blocks arranged at both ends of the clamping roller 16 .

[0034] Reference Figure 4 and Figure 5, the top part of the two conveying racks 15 is provided with a plurality of test chambers 2, and the test chambers 2 at the top of the two conveying racks 15 are symmetrically distributed along the box body 1. In this embodiment, two test chambers 2 on each side of the box body 1 are used as an example for explanation. The test chamber 2 on a conveying rack 15 corresponds to the outlet pipe 14 of the first pressure gauge 12 or the second pressure gauge 13 on the same side of the box body 1 one by one, and the outlet pipe 14 is plugged into the top of the test chamber 2 at one end away from the box body 1, and extends into the inside of the test chamber 2. The bottom ends of the two side walls of the test chamber 2 are fixedly connected to the two sides of the conveying rack 15, and the bottom ends of the front and rear side walls of the test chamber 2 corresponding to the conveying direction of the clamping roller 16 are provided with a clearance groove for allowing the roller body of the clamping roller 16 to pass through. Screws are vertically distributed on the two opposite side walls of the test chamber 2, and a micro motor is fixedly connected to the top of the screw rod. A slider is penetrated and threaded on the screw rod, and the two sliders are relatively distributed. A lifting rod 21 is fixedly connected to the middle part. The rotation of the micro motor drives the screw rod to rotate, and then drives the slider and the lifting rod 21 to move vertically. In some other embodiments, in order to save the cost of air tightness and pressure resistance testing, a guide rod can be used instead of a screw rod on one side of each test chamber 2. The guide rod is a smooth metal rod structure, on which a slider is passed and slidably connected. Thus, the sliding connection between the guide rod and the slider plays a sliding guide role, and the lifting rod 21 is driven vertically by the drive of the motor on only one side. A through hole 211 is vertically pierced in the middle part of the rod body of the lifting rod 21. The aperture of the through hole 211 is larger than the aperture of the bag opening of the packaging bag, and the through hole 211 is used to clamp the bag opening of the packaging bag; the rod body of the lifting rod 21 slides toward each other in the through hole 211, and two sealing blocks 212 are horizontally arranged. The facing surfaces of the sealing blocks 212 are arranged as semicircular arc surfaces, and connecting rods are horizontally formed on the opposite sides of the two sealing blocks 212. The connecting rods extend into the wall of the through hole 211, and micro push rods are arranged on the lifting rod 21 and the corresponding connecting rods inside the wall of the through hole 211. By pushing the two lifting rods 21 to slide horizontally, the two sealing blocks 212 are driven to close and detach.

[0035] Reference Figure 3 and Figure 4 The air outlet pipe 14 is plugged into the middle part of the top of the test chamber 2, and the air outlet pipe 14 is adapted to be provided with a driving cylinder for driving the air outlet pipe 14 to rise and fall, providing a driving force for the pipe opening of the air outlet pipe 14 to rise and fall.

[0036] In other embodiments, the number of test chambers 2 on each conveying rack 15 does not exceed three.

[0037] Reference Figure 1 A refrigeration box is arranged inside the box body 1 bracket, and the refrigeration box is connected to each test chamber 2 through a refrigeration pipeline to transport cold air to each test chamber 2 to create different testing environments in the test chamber 2.

[0038] The implementation principle of the air tightness automatic testing equipment and the testing method of the present application embodiment is as follows: the technicians arrange the packaging bags to be tested one by one, the clamping roller 16 clamps the packaging bags and transports them to the test chamber 2 until the bag opening of the packaging bag is aligned with the perforation 211, the two clamping rollers 16 rotate in opposite directions, and the bag opening of the packaging bag is driven to move up by the squeezing friction force, and at the same time the lifting rod 21 moves down to align the bag opening of the packaging bag with the perforation 211, and the lifting rod 21 and the air outlet pipe 14 move down. The sealing block 212 inside the perforation 211 is closed and the air outlet pipe 14 is plugged into the bag opening. The sealing block 212 is closed, and the facing surfaces form a circular side wall that fits the bag opening, and the air outlet pipe 14 delivers air to the inside of the packaging bag.

[0039] The embodiment of the present application discloses an air tightness test method for inflation and pressure resistance, which is applied to the above-mentioned air tightness automatic test equipment for inflation and pressure resistance. An air tightness test method for inflation and pressure resistance includes the following steps: The technicians classify and sort the packaging bags of the same or different materials in turn, and place them on the clamping rollers 16 on both sides of the box body 1 in turn. The two clamping rollers 16 clamp one packaging bag so that the top part of the packaging bag opening is lower than the top wall height of the yield groove of the test chamber 2; The technician controls the transmission of the chain 151 to drive the clamping roller 16 to transport the packaging bag to the box 1; the packaging bag is transported to the test chamber 2, and the bag opening is aligned with the perforation 211; The technician controls the lifting rod 21 and the air outlet pipe 14 to move downward, the perforation 211 is aligned with the bag opening and plugged, the air outlet pipe 14 moves downward and plugs into the bag opening, and the sealing block 212 closes and abuts the bag opening and the air outlet pipe 14, sealing the plug-in part of the air outlet pipe 14 and the packaging bag; The air outlet pipe 14 is inflated to expand the packaging bag; Based on the above-mentioned steps of automatic conveying and inflation of packaging bags, two subsequent testing processes are carried out, one is the air tightness test of the packaging bags, and the other is the pressure resistance test of the packaging bags; Air tightness test: Inflation: During the process of the air outlet pipe 14 inflating the packaging bag, the first pressure gauge 12 and the second pressure gauge 13 are kept under observation and data recording; when the pressure rising rate starts to decrease, the inflation is stopped, and the bag opening of the packaging bag is kept sealed; Pressure maintenance: Leave the packaging bag still for a preset period of time, observe the readings of the first pressure gauge 12 and the second pressure gauge 13 corresponding to the packaging bag, and judge the pressure maintenance performance of the sealed bag by the reading values ​​and the variation range; Cooling: Maintain the pressure value, control the operation of the refrigeration component, reduce the internal temperature of the test chamber 2 to a preset temperature, maintain it for a preset period of time, and observe the readings of the first pressure gauge 12 and the second pressure gauge 13 corresponding to the packaging bag.

[0040] In the above steps, the temperature is lowered during the pressure holding process, and the pressure change indication is detected by observing the temperature change to determine whether there is gas leakage, or the above temperature reduction process and the pressure holding process are interchanged, the temperature reduction process is performed first, and then the pressure holding process is performed, so as to detect the sealing of the packaging bag at different temperatures using the principle of the control variable method; Pressure resistance test: Inflate, the air outlet pipe 14 continuously inflates the packaging bag; when the pressure rise rate begins to decrease, the inflation is stopped, and the pressure values ​​of the first pressure gauge 12 and the second pressure gauge 13 are recorded; Burst test: After recording is completed, continue to inflate the packaging bag until the packaging bag bursts, and record the critical burst pressure of the first pressure gauge 12 and the second pressure gauge 13; judge whether the packaging bag is qualified by comparing the ideal burst pressure with the actual recorded value; Cooling: The clamping roller 16 is output, and the packaging bag of the same type is replaced in the test chamber 2. After the temperature inside the test chamber 2 is cooled to a preset temperature, the clamping roller 16 conveys the next packaging bag to the test chamber 2, and the steps of inflation and bursting test are repeated to detect the pressure resistance test of the packaging bag at multiple temperatures.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An inflatable pressure-resistant air tightness automated testing device, comprising a box (1), wherein an air inlet pipe and a first pressure gauge (12) are arranged in the box (1), wherein the air pipe is connected to the first pressure gauge (12), and wherein: Also includes: A second pressure gauge (13) is arranged on one side of the first pressure gauge (12); an air intake pipe is arranged inside the box (1) corresponding to the second pressure gauge (13); and the two air intake pipes operate independently; Two air outlet pipes (14) are arranged on two opposite side walls of the box body (1), one end of each of the air outlet pipes (14) extends into the interior of the box body (1) and is respectively connected to the first pressure gauge (12) and the second pressure gauge (13), and the other end is a free end for connecting to a packaging bag; A conveyor belt is horizontally arranged below the box body (1) for conveying packaging bags, and its belt surface is arranged below the outlet of the air outlet pipe (14). A lifting mechanism is arranged on the conveyor belt.

2. The inflatable pressure-resistant airtightness automatic testing equipment according to claim 1, characterized in that: Also includes: A clamping roller (16) is horizontally arranged, two of the clamping rollers (16) form a group, and multiple groups of the clamping rollers (16) are evenly spaced and distributed along the length direction of the conveyor belt to form a belt surface structure. Driving members are arranged at both ends of the clamping roller (16) to drive the clamping roller (16) to rotate; A test chamber (2) is provided at the top end of the conveyor belt corresponding to the two air outlet pipes (14); the lifting mechanism is provided in the test chamber (2); and the test chamber (2) is connected to a refrigeration component.

3. The inflatable pressure-resistant airtightness automatic testing equipment according to claim 2, characterized in that: The lifting assembly comprises: A lifting rod (21) is horizontally arranged inside the test chamber (2), and a driving member for driving the lifting rod (21) is arranged on a side wall of the test chamber (2); a through hole (211) adapted to fit the bag opening of a packaging bag is vertically penetrated through the rod body of the lifting rod (21); a free end of the air outlet pipe (14) extends into the lifting rod (21) and is plugged into the bag opening of the packaging bag.

4. The inflatable pressure-resistant airtightness automatic testing equipment according to claim 1 is characterized in that: The lifting rod (21) is provided with a sealing member on the wall of the through hole (211) to seal the connection portion between the outlet pipe (14) and the bag opening of the packaging bag.

5. The air tightness automatic testing equipment for inflatable pressure resistance according to claim 2, characterized in that: A plurality of the test chambers (2) are arranged above the conveyor belt, and the plurality of the test chambers (2) are evenly distributed on both sides of the box body (1); a plurality of the air outlet pipes (14), the first pressure gauge (12), and the second pressure gauge (13) are arranged corresponding to each of the test chambers (2).

6. A method for testing the air tightness of an inflatable pressure-resistant container, characterized in that: applied to said test equipment; The test method includes: clamping a plurality of packaging bags in sequence between a plurality of groups of clamping rollers (16), and controlling the clamping rollers (16) to run along the direction of the conveyor belt; The clamping roller (16) transports the packaging bag to the test chamber (2), and one packaging bag corresponds to one test chamber (2); The lifting rod (21) is controlled to move downward, and at the same time, the clamping roller (16) rotates to drive the packaging bag to move upward, and the perforation (211) of the lifting rod (21) is plugged into the bag opening of the packaging bag; The outlet pipe (14) is plugged into the bag opening of the packaging bag to seal the bag opening; the outlet pipe (14) is used to inflate air into the packaging bag.

7. The method for testing air tightness of an inflatable pressure-resistant device according to claim 6, characterized in that: The following steps are also included: S1: Inflation, during the process of the air outlet pipe (14) inflating the packaging bag, the first pressure gauge (12) and the second pressure gauge (13) are observed and data are recorded; when the pressure rise rate begins to decrease, the inflation is stopped and the bag opening of the packaging bag is kept sealed; S2: Pressure maintenance: The packaging bag is left to stand for a preset period of time, and the readings of the first pressure gauge (12) and the second pressure gauge (13) corresponding to the packaging bag are observed, and the pressure maintenance performance of the sealing bag is judged by the reading values ​​and the variation range; S3: Cooling: The pressure is maintained at a value, the refrigeration unit is controlled to operate, the internal temperature of the test chamber (2) is reduced to a preset temperature, maintained for a preset period of time, and the readings of the first pressure gauge (12) and the second pressure gauge (13) corresponding to the packaging bag are observed; or, The order of S2 and S3 is swapped.

8. The method for testing the air tightness of an inflatable pressure-resistant device according to claim 6, characterized in that: The following steps are also included: S1: Inflation, the air outlet pipe (14) continuously inflates the packaging bag; when the pressure rise rate begins to decrease, the inflation is stopped, and the pressure values ​​of the first pressure gauge (12) and the second pressure gauge (13) are recorded; S2: Burst test: After recording is completed, continue to inflate the packaging bag until the packaging bag bursts, and record the burst critical pressure of the first pressure gauge (12) and the second pressure gauge (13); judge whether the packaging bag is qualified by comparing the ideal burst pressure with the actual recorded value; S3: Cooling: The clamping roller (16) is output, and a packaging bag of the same type is replaced in the test chamber (2). After the temperature inside the test chamber (2) is cooled to a preset temperature, steps S1 and S2 are repeated.

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