Airtight packaging box relative humidity detection device and method

Abstract

The application belongs to the technical field of detection equipment, and specifically discloses a relative humidity detection equipment for airtight packaging boxes, which comprises an equipment shell and a pneumatic clamping jaw arranged in the equipment shell, a test box body is clamped on the pneumatic clamping jaw, a vertical hydraulic cylinder and a horizontal hydraulic cylinder are connected to the equipment shell, an air conveying structure is connected to the output end of the vertical hydraulic cylinder, a plugging structure and a detection structure are connected to the output end of the horizontal hydraulic cylinder, the air conveying structure comprises a mounting bracket fixed to the output end of the vertical hydraulic cylinder, a mounting plate fixed to the mounting bracket, a mounting cavity arranged on the mounting plate and a plug-in pipe fixed to the mounting cavity, and a relative humidity detection method for airtight packaging boxes is also disclosed. The plug-in pipe, the sealing plug-in column and the sleeve shell are inserted into the test box body, the inflatable rubber ring can simulate the extrusion strength of the port connecting piece of the test box body, the rate of external humid gas entering the test box body is simulated, and the relative humidity in the test box body is detected.

Description

Technical Field

[0001] This invention belongs to the field of testing equipment technology, and specifically discloses a relative humidity testing device and method for airtight packaging boxes. Background Technology

[0002] An airtight packaging box is a sealed container made with special design and materials. Its core function is to protect the contents from the influence of the external environment by preventing the penetration of gases (such as air, water vapor, harmful gases, etc.). During the production process, workers need to use humidity detection equipment to test the airtightness of the airtight packaging box.

[0003] Currently, the main methods for testing the sealing of airtight packaging boxes on the market are pressure decay method, vacuum decay method and bubble method. Among them, the pressure decay method is the most widely used. The pressure decay method involves filling the airtight packaging box with compressed air, then turning off the air source, and using testing equipment to monitor the rate of pressure decay inside the airtight packaging box. If the pressure drop inside the airtight packaging box exceeds the standard threshold, it can be determined that the airtight packaging box is leaking, and it can be inferred that when the airtight packaging box is in use, the humidity of the external environment will enter the interior of the airtight packaging box.

[0004] While the aforementioned airtight packaging box testing method can determine whether humid gas will enter the airtight packaging box in actual use, the testing equipment does not have a humidification structure to simulate the environment in which the airtight packaging box is located. This means that the testing equipment cannot simulate the state of the airtight packaging box in a real environment, making it difficult for staff to intuitively understand the rate at which humid gas enters the airtight packaging box, and also making it difficult for staff to understand the humidity inside the airtight packaging box when it is used in an external environment.

[0005] To address this issue, we propose a relative humidity detection device and method for airtight packaging boxes, which solves the problems of existing airtight packaging box detection devices not allowing staff to intuitively understand the rate at which humid gas enters the airtight packaging box and the humidity inside the airtight packaging box. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a relative humidity detection device and method for airtight packaging boxes to solve the problems mentioned above.

[0007] To achieve the above objectives, the present invention provides a relative humidity testing device for airtight packaging boxes, including a device housing and a pneumatic gripper disposed inside the device housing. The pneumatic gripper holds a test box. A vertical hydraulic cylinder and a horizontal hydraulic cylinder are connected to the device housing. The output end of the vertical hydraulic cylinder is connected to an air supply structure, and the output end of the horizontal hydraulic cylinder is connected to a sealing structure and a detection structure.

[0008] The air supply structure includes a mounting bracket fixed to the output end of a vertical hydraulic cylinder, a mounting plate fixed to the mounting bracket, a mounting cavity provided on the mounting plate, and a connector fixed to the mounting cavity. The mounting plate is provided with a sealing structure.

[0009] The detection structure includes a movable plate distributed inside the equipment housing and a connecting column fixed on the movable plate. The connecting column is fixed to the output end of the transverse hydraulic cylinder. A sealing ring is fixedly connected to the movable plate. An air extraction pipe, a first humidity sensor, an air pressure sensor, and a second humidity sensor are connected inside the sealing ring. A sleeve is fitted on the sealing ring. A second solenoid valve is detachably connected to the air extraction pipe.

[0010] In the above technical solution, the lower part of the equipment housing is provided with an air supply structure, the interior of the equipment housing and the part opposite to the pneumatic gripper are provided with a water spray structure, and an exhaust port is fixed on the equipment housing.

[0011] In the above technical solution, further, an alarm is detachably connected to the upper part of the equipment housing, and a controller is connected to one side of the equipment housing. The control ends of the water spray structure, the alarm, the pneumatic gripper, the vertical hydraulic cylinder, the horizontal hydraulic cylinder, and the controller are connected.

[0012] In the above technical solution, a third humidity sensor is further connected to the bottom surface of the mounting plate, the inner cavity of the insertion tube is connected to the inner cavity of the mounting cavity, and the insertion tube is inserted into the gas collection end of the test chamber.

[0013] In the above technical solution, the movable plate is further provided with a sealing structure, which includes a sleeve, an inflatable rubber ring embedded inside the sleeve, a connecting air pipe fixed on the inflatable rubber ring, and a first solenoid valve connected to the end of the connecting air pipe. The air collecting end of the first solenoid valve is connected to the air supply end of the air supply structure.

[0014] In the above technical solution, the outer wall of the sleeve is fixedly connected with an installation ring, the sleeve on the movable plate is sleeved on the outside of the housing, and the sleeve sleeved on the outside of the housing is fixedly connected to the movable plate through the installation ring.

[0015] In the above technical solution, the sleeve on the mounting plate is fitted onto the outside of the insertion tube, and the sleeve fitted onto the outside of the insertion tube is fixedly connected to the mounting plate by a mounting ring, wherein the mounting ring is a ring-shaped structure.

[0016] In the above technical solution, the sealing structure further includes an adjusting plate distributed above the moving plate. An electric push rod and a plug-in slide rod are fixed on the moving plate. The output end of the electric push rod is fixed to the adjusting plate. The plug-in slide rod is plugged into the adjusting plate. A sealing plug is fixed on the adjusting plate. A sealing structure is also connected to the adjusting plate. The sleeve on the adjusting plate is sleeved with the sealing plug.

[0017] In the above technical solution, a mounting block is further fixed on the movable plate, the electric push rod is fixed by the mounting block and the movable plate, and a mounting column is fixed on one side of the movable plate located on the mounting block, and the mounting column and the connecting column are fixed.

[0018] A method for detecting the relative humidity of an airtight packaging box includes the following steps:

[0019] Step 1, Calibration: First, clamp the test chamber inside the equipment housing using pneumatic grippers, so that the air inlet end of the test chamber is opposite to the connector, the exhaust end of the test chamber is opposite to the casing, and the other ports of the test chamber are opposite to the sealing structure.

[0020] Step 2: Simulation. Control the output end of the vertical hydraulic cylinder to drive the insertion pipe on the mounting plate to connect with the air inlet end of the test chamber. Control the output end of the horizontal hydraulic cylinder to drive the sleeve on the moving plate to connect with the exhaust end of the test chamber. At the same time, the output end of the horizontal hydraulic cylinder drives the sealing structure to seal the other ports of the test chamber.

[0021] Step 3: Check the seal. Start the first solenoid valve to drive the gas pumped in by the gas supply structure to deliver gas into the inside of the inflatable rubber ring. At the same time, control the air pressure inside the inflatable rubber ring through the first solenoid valve to ensure that the inflatable rubber ring seals the port of the test box.

[0022] Step 4: Testing. The gas supply structure can inject gas into the test chamber through the connecting pipe, while the relative humidity inside the equipment housing is maintained. During this process, the pressure sensor detects the gas pressure inside the test chamber, and the first humidity sensor detects the relative humidity inside the test chamber.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. When the insertion tube, sealing post, and sleeve in the testing equipment are inserted into the test chamber, the inflatable rubber ring can press and seal the port of the test chamber. During this process, the inflatable rubber ring can simulate the compressive strength of the test chamber port connector, thereby simulating the rate at which external humid gas enters the test chamber.

[0025] 2. When the connector in the testing device is inserted into the test chamber, the connector can pump gas at a suitable pressure into the test chamber. This can simulate the rate at which external humid gas enters the test chamber during actual use, thus facilitating the detection of the relative humidity inside the test chamber by the first humidity sensor when the test chamber is used under standard atmospheric pressure.

[0026] 3. The exhaust pipe in this testing equipment can work with the sealing structure to extract excess gas from the inside of the test chamber, which can prevent external humid gas from entering the inside of the test chamber and facilitate multiple humidity tests inside the test chamber. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a connection structure diagram of the test chamber and the equipment housing in this invention;

[0029] Figure 3 This is a diagram showing the connection structure between the gas delivery structure, the sealing structure, the detection structure, and the test chamber in this invention.

[0030] Figure 4 This is a schematic diagram of the gas delivery structure in this invention;

[0031] Figure 5 This is a schematic diagram showing the distribution of the blocking structure and the detection structure in this invention;

[0032] Figure 6 This is an axial view of the detection structure in this invention;

[0033] Figure 7 This is a schematic diagram of the sealing structure in this invention;

[0034] Figure 8 This is a structural diagram showing the separation of the casing and the movable plate in this invention.

[0035] 1. Equipment housing; 11. Exhaust port; 12. Pneumatic gripper; 13. Air supply structure; 2. Vertical hydraulic cylinder; 3. Alarm; 4. Controller; 5. Test chamber; 6. Water spray structure; 7. Air supply structure; 71. Mounting bracket; 72. Sealing structure; 721. First solenoid valve; 722. Sleeve; 723. Mounting ring; 724. Inflatable rubber ring; 725. Connecting air pipe; 73. Mounting cavity; 74. Mounting plate; 75. Third humidity sensor 76. Connecting pipe; 8. Sealing structure; 81. Adjusting plate; 82. Electric push rod; 83. Connecting slide rod; 84. Sealing insert; 9. Detection structure; 91. Connecting column; 92. Moving plate; 93. Suction pipe; 94. First humidity sensor; 95. Housing; 96. Air pressure sensor; 97. Mounting block; 98. Mounting column; 99. Sealing ring; 910. Second humidity sensor; 911. Second solenoid valve; 10. Horizontal hydraulic cylinder. Detailed Implementation

[0036] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0038] Currently, the pressure decay method can indeed determine whether humid gas will enter the airtight packaging box. However, this method is not convenient for simulating the state of the airtight packaging box in a real environment during actual use. This makes it difficult for staff to intuitively understand the rate at which humid gas enters the airtight packaging box, and it is also difficult for staff to understand the humidity inside the airtight packaging box when it is used in an external environment. In order to solve the above problems, the following structure is proposed.

[0039] Example 1: Please refer to Figure 1-8 As shown, the present invention provides a technical solution:

[0040] The present invention is a relative humidity detection device for an airtight packaging box, including a device housing 1 and a pneumatic gripper 12 disposed inside the device housing 1. The pneumatic gripper 12 holds a test box 5. A vertical hydraulic cylinder 2 and a horizontal hydraulic cylinder 10 are connected to the device housing 1. The output end of the vertical hydraulic cylinder 2 is connected to an air supply structure 7, and the output end of the horizontal hydraulic cylinder 10 is connected to a sealing structure 8 and a detection structure 9.

[0041] The air supply structure 7 includes a mounting bracket 71 fixed to the output end of the vertical hydraulic cylinder 2, a mounting plate 74 fixed to the mounting bracket 71, a mounting cavity 73 provided on the mounting plate 74, and a plug pipe 76 fixed on the mounting cavity 73. A sealing structure 72 is provided on the mounting plate 74.

[0042] The lower part of the equipment housing 1 is provided with an air supply structure 13. The vertical hydraulic cylinder 2 can drive the insertion pipe 76 on the mounting plate 74 to abut against the air collection end of the test chamber 5 through the mounting bracket 71. The inner cavity of the insertion pipe 76 is connected to the inner cavity of the mounting cavity 73. When the insertion pipe 76 is inserted into the air collection end of the test chamber 5, the air supply structure 13 can drive the air to be delivered to the inside of the test chamber 5 through the mounting cavity 73 and the insertion pipe 76, so as to test the sealing performance of the test chamber 5 under a suitable air pressure.

[0043] The pneumatic gripper 12 can be selected from existing structures for clamping the test chamber 5 on the market. When the pneumatic gripper 12 clamps the test chamber 5, the output end of the vertical hydraulic cylinder 2 can drive the insertion pipe 76 to be inserted into the gas collection end of the test chamber 5 through the mounting plate 74, thereby allowing the insertion pipe 76 to drive the gas to be injected into the interior of the test chamber 5 through the mounting cavity 73.

[0044] The detection structure 9 includes a movable plate 92 distributed inside the equipment housing 1 and a connecting column 91 fixed on the movable plate 92. The connecting column 91 is fixed to the output end of the transverse hydraulic cylinder 10. A sealing ring 99 is fixedly connected to the movable plate 92. An air extraction pipe 93, a first humidity sensor 94, a pressure sensor 96 and a second humidity sensor 910 are connected inside the sealing ring 99. A housing 95 is sleeved on the sealing ring 99. The detection ends of the first humidity sensor 94 and the pressure sensor 96 can penetrate the housing 95. A second solenoid valve 911 is detachably connected to the air extraction pipe 93. The suction end of the air extraction pipe 93 can penetrate the housing 95.

[0045] When the output end of the horizontal hydraulic cylinder 10 drives the moving plate 92 to approach the test chamber 5 through the connecting column 91, the housing 95 can be inserted into the exhaust end of the test chamber 5. During this process, the air pressure sensor 96 can detect the air pressure inside the test chamber 5 in real time, the first humidity sensor 94 can detect the humidity inside the test chamber 5 in real time, and the second humidity sensor 910 can detect whether there is humid gas entering the inside of the housing 95 in real time, which makes it convenient for staff to inspect the first humidity sensor 94 and the air pressure sensor 96.

[0046] After the relative humidity inside the test chamber 5 is detected, the staff can control the second solenoid valve 911 through the controller 4. At this time, the gas inside the equipment housing 1 will be discharged to the outside, making it easier for the staff to take the test chamber 5 after the test.

[0047] An air supply structure 13 is provided at the lower part of the equipment housing 1, a water spray structure 6 is provided inside the equipment housing 1 at the part opposite to the pneumatic gripper 12, and an exhaust port 11 is fixed on the equipment housing 1.

[0048] The air supply structure 13 can be selected as an existing air pump structure on the market. The output end of the air supply structure 13 is connected to the mounting cavity 73. The air supply structure 13 can drive air to be delivered to the inside of the test chamber 5 through the mounting cavity 73 and the insertion pipe 76, so as to test the sealing performance of the test chamber 5 under a suitable air pressure.

[0049] The water spray structure 6 can be selected from existing atomizing nozzles on the market. The water spray structure 6 is connected to an external pump. In actual use, the water spray structure 6 can deliver water to the inside of the equipment housing 1, thereby enabling the equipment housing 1 to simulate the environment used by the test chamber 5.

[0050] An alarm 3 is detachably connected to the upper part of the equipment housing 1. A controller 4 is connected to one side of the equipment housing 1. The control terminals of the water spray structure 6, alarm 3, pneumatic gripper 12, vertical hydraulic cylinder 2, and horizontal hydraulic cylinder 10 are connected to the controller 4.

[0051] The controller 4 is equipped with a PLC control program. The mounting cavity 73 is connected to the air supply end of the air supply structure 13. When the internal air pressure of the test chamber 5 reaches the actual air pressure value used by the test chamber 5, the air pressure sensor 96 can transmit the value to the inside of the controller 4. At this time, the controller 4 controls the air supply structure 13 to stop supplying air to the mounting cavity 73.

[0052] Meanwhile, the PLC control program inside the controller 4 can control the alarm 3 to work. After the sealing test of the test chamber 5 is completed, the controller 4 controls the alarm 3 to work, making it convenient for staff to take the test chamber 5 away.

[0053] The bottom surface of the mounting plate 74 is connected to the third humidity sensor 75. The inner cavity of the connector 76 is connected to the inner cavity of the mounting cavity 73. The connector 76 is inserted into the gas collection end of the test chamber 5.

[0054] The third humidity sensor 75 can detect the humidity environment inside the equipment housing 1 in real time. When the third humidity sensor 75 detects that the humidity inside the equipment housing 1 reaches a suitable value, the third humidity sensor 75 transmits information to the controller 4. At this time, the controller 4 controls the external pump connected to the water spray structure 6 to stop supplying water, thereby realizing the simulation of the real use environment of the test chamber 5 inside the equipment housing 1.

[0055] Example 2: Please refer to Figure 2-8As shown, based on Embodiment 1, the present invention provides a technical solution. Unlike Embodiment 1, the squeezing force of the inflatable rubber ring 724 on the port of the test chamber 5 in this embodiment can simulate the squeezing force that the port of the test chamber 5 is subjected to when it is actually connected to an external device, and thus simulate the rate at which external humid gas enters the interior of the test chamber 5 through the port when the test chamber 5 is connected to an external device.

[0056] A sealing structure 72 is also connected to the movable plate 92. The sealing structure 72 includes a sleeve 722, an inflatable rubber ring 724 embedded inside the sleeve 722, a connecting air pipe 725 fixed on the inflatable rubber ring 724, and a first solenoid valve 721 connected to the end of the connecting air pipe 725. The air collecting end of the first solenoid valve 721 is connected to the air supply end of the air supply structure 13.

[0057] In actual use, the air supply structure 13 can supply air to the inside of the inflation ring 724 through the first solenoid valve 721. The controller 4 can control the inflation state of the inflation ring 724 through the first solenoid valve 721. The squeezing force of the inflation ring 724 on the port of the test chamber 5 can simulate the squeezing force that the port of the test chamber 5 is actually connected to the external device. In turn, it can simulate the rate at which external humid gas enters the inside of the test chamber 5 through the port when the connection between the test chamber 5 and the external device is not ideal.

[0058] The first humidity sensor 94 used in this document is a humidity-sensitive resistor sensor. When the ambient humidity inside the test chamber 5 increases, the material at the detection end of the humidity-sensitive resistor sensor will adsorb water molecules, resulting in a decrease in resistance value. Conversely, when the humidity decreases, the resistance value increases. The controller 4 is equipped with a control program that reads the information transmitted by the first humidity sensor 94. The controller 4 can perform data calculations based on the control program and the resistance value response time to provide the staff with the rate at which external humid gas enters the test chamber 5.

[0059] The outer wall of the sleeve 722 is fixedly connected to the mounting ring 723. The sleeve 722 on the movable plate 92 is sleeved on the outside of the housing 95. The sleeve 722 sleeved on the outside of the housing 95 is fixedly connected to the movable plate 92 through the mounting ring 723.

[0060] The sleeve 722 on the mounting plate 74 is fitted onto the outside of the insertion tube 76. The sleeve 722 fitted onto the outside of the insertion tube 76 is fixedly connected to the mounting plate 74 by the mounting ring 723, which is a ring-shaped structure.

[0061] The sealing structure 8 includes an adjusting plate 81 distributed above the movable plate 92. An electric push rod 82 and a plug-in slide rod 83 are fixed on the movable plate 92. The output end of the electric push rod 82 is fixed to the adjusting plate 81. The plug-in slide rod 83 is plugged into the adjusting plate 81. A sealing plug 84 is fixed on the adjusting plate 81. A sealing structure 72 is also connected to the adjusting plate 81. The sleeve 722 on the adjusting plate 81 is sleeved with the sealing plug 84.

[0062] When the electric push rod 82 is working, the electric push rod 82 can be used in conjunction with the plug-in slide rod 83 to adjust the height of the adjustment plate 81, thereby facilitating the insertion of the sealing plug 84 into the port of the test chamber 5, so as to seal the other ports of the test chamber 5. The other ports of the test chamber 5 referred to in this document are the ports of the test chamber 5 other than the gas collection port and the gas exhaust port.

[0063] A mounting block 97 is fixed on the movable plate 92. The electric push rod 82 is fixed through the mounting block 97 and the movable plate 92. A mounting post 98 is fixed on one side of the movable plate 92 located on the mounting block 97. The mounting post 98 and the connecting post 91 are fixed together.

[0064] A method for detecting the relative humidity of an airtight packaging box includes the following steps:

[0065] Step 1, Calibration: First, clamp the test chamber 5 inside the equipment housing 1 using the pneumatic gripper 12, so that the air inlet end of the test chamber 5 is opposite to the connector 76, the exhaust end of the test chamber 5 is opposite to the housing 95, and the other ports of the test chamber 5 are opposite to the sealing structure 8.

[0066] Step 2: Simulation. Control the output end of the vertical hydraulic cylinder 2 to drive the insertion pipe 76 on the mounting plate 74 to connect with the air inlet end of the test chamber 5. Control the output end of the horizontal hydraulic cylinder 10 to drive the sleeve 95 on the moving plate 92 to connect with the exhaust end of the test chamber 5. At the same time, the output end of the horizontal hydraulic cylinder 10 drives the sealing structure 8 to seal the other ports of the test chamber 5.

[0067] Step 3: Check the seal. Start the first solenoid valve 721 to drive the gas pumped in by the gas supply structure 13 to deliver gas to the inside of the inflatable rubber ring 724. At the same time, control the air pressure inside the inflatable rubber ring 724 through the first solenoid valve 721 to ensure that the inflatable rubber ring 724 seals the port of the test chamber 5.

[0068] Step 4: Testing. The gas supply structure 13 can inject gas into the interior of the test chamber 5 through the plug pipe 76. At the same time, the interior of the equipment housing 1 maintains relative humidity. During this process, the pressure sensor 96 detects the pressure inside the test chamber 5, and the first humidity sensor 94 detects the relative humidity inside the test chamber 5.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A relative humidity detection device for an airtight packaging box, comprising a device housing (1) and pneumatic grippers (12) disposed inside the device housing (1), characterized in that: The pneumatic gripper (12) holds the test box (5), and the equipment housing (1) is connected to a vertical hydraulic cylinder (2) and a horizontal hydraulic cylinder (10). The output end of the vertical hydraulic cylinder (2) is connected to an air supply structure (7), and the output end of the horizontal hydraulic cylinder (10) is connected to a sealing structure (8) and a detection structure (9). A water spray structure (6) is provided inside the housing (1) and at the opposite part of the pneumatic gripper (12). The gas supply structure (7) includes a mounting bracket (71) fixed to the output end of the vertical hydraulic cylinder (2), a mounting plate (74) fixed to the mounting bracket (71), a mounting cavity (73) provided on the mounting plate (74), and a plug pipe (76) fixed to the mounting cavity (73). A sealing structure (72) is provided on the mounting plate (74). The detection structure (9) includes a movable plate (92) distributed inside the equipment housing (1) and a connecting column (91) fixed on the movable plate (92). The connecting column (91) is fixed to the output end of the transverse hydraulic cylinder (10). A sealing ring (99) is fixedly connected to the movable plate (92). An air extraction pipe (93), a first humidity sensor (94), an air pressure sensor (96), and a second humidity sensor (910) are connected inside the sealing ring (99). A sleeve (95) is fitted on the sealing ring (99). A second solenoid valve (911) is detachably connected to the air extraction pipe (93). The movable plate (92) is also connected to a sealing structure (72), which includes a sleeve (722), an inflatable rubber ring (724) embedded inside the sleeve (722), a connecting air pipe (725) fixed on the inflatable rubber ring (724), and a first solenoid valve (721) connected to the end of the connecting air pipe (725). The gas collecting end of the first solenoid valve (721) is connected to the gas supply end of the gas supply structure (13).

2. The relative humidity detection device for an airtight packaging box according to claim 1, characterized in that, The lower part of the equipment housing (1) is provided with an air supply structure (13), and an exhaust port (11) is fixed on the equipment housing (1).

3. The relative humidity detection device for an airtight packaging box according to claim 1, characterized in that, An alarm (3) is detachably connected to the upper part of the equipment housing (1), and a controller (4) is connected to one side of the equipment housing (1). The control ends of the water spray structure (6), the alarm (3), the pneumatic gripper (12), the vertical hydraulic cylinder (2), and the horizontal hydraulic cylinder (10) are connected to the controller (4).

4. The relative humidity detection device for an airtight packaging box according to claim 1, characterized in that, The bottom surface of the mounting plate (74) is connected to a third humidity sensor (75), the inner cavity of the insertion tube (76) is connected to the inner cavity of the mounting cavity (73), and the insertion tube (76) is inserted into the gas collection end of the test chamber (5).

5. The relative humidity detection device for an airtight packaging box according to claim 1, characterized in that, The outer wall of the sleeve (722) is fixedly connected to the mounting ring (723). The sleeve (722) on the moving plate (92) is sleeved on the outside of the housing (95). The sleeve (722) sleeved on the outside of the housing (95) is fixedly connected to the moving plate (92) through the mounting ring (723).

6. The relative humidity detection device for an airtight packaging box according to claim 5, characterized in that, The sleeve (722) on the mounting plate (74) is fitted onto the outside of the insertion tube (76). The sleeve (722) fitted onto the outside of the insertion tube (76) is fixedly connected to the mounting plate (74) by the mounting ring (723), which is a ring-shaped structure.

7. The relative humidity detection device for an airtight packaging box according to claim 1, characterized in that, The sealing structure (8) includes an adjusting plate (81) distributed above the moving plate (92). An electric push rod (82) and a plug-in slide rod (83) are fixed on the moving plate (92). The output end of the electric push rod (82) is fixed to the adjusting plate (81). The plug-in slide rod (83) is plugged into the adjusting plate (81). A sealing plug (84) is fixed on the adjusting plate (81). A sealing structure (72) is also connected to the adjusting plate (81). The sleeve (722) on the adjusting plate (81) is sleeved with the sealing plug (84).

8. The relative humidity detection device for an airtight packaging box according to claim 7, characterized in that, An installation block (97) is fixed on the movable plate (92). The electric push rod (82) is fixed by the installation block (97) and the movable plate (92). An installation column (98) is fixed on one side of the movable plate (92) located on the installation block (97). The installation column (98) and the connecting column (91) are fixed.

9. A method for detecting the relative humidity of an airtight packaging box, the method being applicable to the relative humidity detection equipment for airtight packaging boxes as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1, Calibration: First, clamp the test box (5) inside the equipment housing (1) using pneumatic grippers (12), so that the air inlet end of the test box (5) is opposite to the plug pipe (76), the exhaust end of the test box (5) is opposite to the casing (95), and the other ports of the test box (5) are opposite to the sealing structure (8). Step 2: Simulation. Control the output end of the vertical hydraulic cylinder (2) to drive the insertion pipe (76) on the mounting plate (74) to connect with the air inlet end of the test box (5). Control the output end of the horizontal hydraulic cylinder (10) to drive the sleeve (95) on the moving plate (92) to connect with the exhaust end of the test box (5). At the same time, the output end of the horizontal hydraulic cylinder (10) drives the sealing structure (8) to seal the other ports of the test box (5). Step 3: Check the seal. Start the first solenoid valve (721) to drive the gas pumped in by the gas supply structure (13) to deliver gas to the inside of the inflatable rubber ring (724). At the same time, control the air pressure inside the inflatable rubber ring (724) through the first solenoid valve (721) to ensure that the inflatable rubber ring (724) seals the port of the test box (5). Step 4, detection: The gas supply structure (13) can inject gas into the interior of the test chamber (5) through the plug pipe (76), while the interior of the equipment housing (1) maintains relative humidity. During this process, the air pressure sensor (96) detects the air pressure inside the test chamber (5), and the first humidity sensor (94) detects the relative humidity inside the test chamber (5).

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