Eight-channel differential pressure airtight machine sealing structure

Abstract

The invention discloses an eight-channel differential pressure airtight machine sealing structure which comprises an aluminum type frame, an air tightness tester, a control module and a gliding bottom plate, and the air tightness tester and the control module are assembled at the top end in the aluminum type frame. According to the sealing structure of the eight-channel differential pressure airtight machine, the to-be-tested workpiece in the lower die is detected through the airtight tester, so that efficient switching testing is achieved, meanwhile, the testing efficiency and precision are improved, the problem that air leakage is generated when the device detects the to-be-tested workpiece, and consequently the data precision after workpiece detection is reduced is solved, and the sealing performance of the eight-channel differential pressure airtight machine is improved. The stability and reliability of the device are enhanced, good sealing performance can be kept in a high-pressure environment, the test precision is improved, the application range is widened, the maintenance cost is reduced, and the overall applicability of the device is greatly improved. Therefore, economic losses caused by the fact that devices of different specifications need to be replaced due to the problem that the sizes of the workpieces are different are reduced.

Description

Technical Field

[0001] The present invention relates to the field of airtight machine sealing equipment, and in particular to an eight-channel differential pressure airtight machine sealing structure. Background Art

[0002] The basic principle of a differential pressure airtightness tester is to detect leaks by comparing the pressure inside and outside the sample under test using the principle of static pressure difference. During the test, the instrument simultaneously fills the standard component and the sample under test with equal pressure. Then, a solenoid valve cuts off the air supply and observes and compares the pressure difference between the standard component and the sample under test. If the difference is zero or within an acceptable range, the sample under test is qualified, identical to the standard component. If the difference exceeds the acceptable range, the sample is deemed unqualified.

[0003] In the manufacturing industry, product airtightness is a critical quality control indicator. Traditional airtightness testing equipment typically utilizes a single or limited number of test channels, resulting in low test efficiency and an inability to meet the demands of large-scale production. Furthermore, existing airtightness testing equipment is susceptible to environmental influences during testing, which can affect the accuracy of test results. With technological advancements, multi-channel airtightness testing equipment has become a research hotspot.

[0004] While multi-channel airtightness testing equipment has improved testing efficiency, significant drawbacks remain in terms of test accuracy, maintenance costs, and applicability. Existing equipment, in particular, suffers from poor sealing and stability in high-pressure environments, making it prone to misjudgment and severely impacting product quality and production efficiency. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present application provides an eight-channel differential pressure airtight machine sealing structure to solve the above-mentioned technical problems.

[0006] To achieve the above-mentioned objectives, the present application provides the following technical solutions: an eight-channel differential pressure airtight machine sealing structure, comprising an aluminum frame, an airtightness tester, a control module and a sliding bottom plate, the airtightness tester and the control module are respectively assembled at the inner top end of the aluminum frame, the sliding bottom plate is assembled in the inner cavity of the aluminum frame, the airtightness tester comprises a test host, and the test host is embedded in the interior of the aluminum frame, the front of the test host is evenly provided with pressure regulating valves, the front of the test host is evenly provided with control buttons, the front of the test host is embedded with a touch screen, the other end of the test host is embedded with an output port, and the outside of the test host is equipped with an input port, the back of the test host is equipped with a filter, and the back of the test host is evenly provided with test ports.

[0007] Cylinder brackets are evenly distributed on the top of the sliding bottom plate, and output cylinders are plugged into the inside of the cylinder brackets. There are eight groups of output cylinders, which are divided into a front area and a rear area. The output ends of the output cylinders are connected to the upper mold. Bases are evenly distributed on the top of the sliding bottom plate, and both sides of the upper end surface of the base are connected to the lower mold. The upper end surface of the lower mold is embedded with a lower mold core, and the interior of the lower mold core is equipped with an air intake pipe. The outside of the lower mold is equipped with a sealing cylinder, and the output end of the sealing cylinder is in contact with the air intake pipe. The interior of the lower mold is equipped with a workpiece to be measured.

[0008] A gas inlet is provided inside the upper mold.

[0009] Preferably, casters and foot pads are evenly distributed on the four corners of the bottom of the aluminum frame, and the bottom of the foot pads is equipped with rubber pads. The casters facilitate the movement of the aluminum frame when not in use, thereby facilitating the transportation and storage of the entire device. The foot pads can be manually changed in height by the staff, and then support the aluminum frame when in use, thereby greatly improving the stability of the aluminum frame when in use, and improving the stability of the casters when the aluminum frame is in use.

[0010] Preferably, cabinet doors are installed on both sides of the front of the aluminum frame through hinges, and the inner cavity of the aluminum frame is equipped with gas cylinders and pneumatic triplexes. The cabinet doors can seal the chamber inside the aluminum frame, thereby protecting the device inside the inner cavity of the aluminum frame. At the same time, a chamber is opened at the inner bottom of the aluminum frame, and the chamber can be used to store parts required by the device in the working state, as well as processing parts required by the device during processing, etc.

[0011] Preferably, the top of the aluminum frame is equipped with a three-color light, the front of the aluminum frame is equipped with a control panel, and control buttons are evenly distributed on the top of the control panel. The three-color light can display the working status of the aluminum frame, and alarm the staff in an emergency situation. At the same time, the control panel can control the mechanical components inside the aluminum frame and start and stop the work through external control buttons, thereby greatly improving the safety performance and working stability of the aluminum frame.

[0012] Preferably, pressure reducing valve plates are embedded on both sides of the aluminum frame, and square holes are evenly opened on the outside of the pressure reducing valve plates. Grating plates are evenly distributed on the outside of the aluminum frame, and the outside of the grating plates is polished with rounded corners. The pressure reducing valve plates can protect the internal components of the device and are convenient for disassembly from the aluminum frame, and then the internal components of the aluminum frame can be maintained and repaired, greatly improving the stability and repair speed of the device during use. At the same time, the grating plates can isolate and protect the device and external staff, and the rounded grating plates avoid collision damage with the staff, thereby protecting the device and the staff.

[0013] Preferably, limiting grooves are provided on both sides of the exterior of the lower mold, and the lower mold is connected to the base by bolts. The limiting grooves facilitate the clamping connection between the lower mold and the upper mold. At the same time, the lower mold connected by bolts is convenient for disassembly and maintenance from the top of the base, thereby improving the overall use effect of the device and avoiding the normal use of the device being affected by long-term disassembly.

[0014] Preferably, the top of the upper mold is equipped with a clamping mechanism, which includes a pressure plate, the bottom of the pressure plate is connected to a second spring, and the other end of the second spring is connected to the upper mold, both sides of the bottom of the pressure plate are connected to connecting rods through hinges, the bottom of the connecting rod is connected to a T-shaped slider through a hinge, and the outside of the T-shaped slider is connected to a bent arm, and the other end of the bent arm is connected to a clamping block. The clamping mechanism can be driven to descend when the output cylinder drives the upper mold and the lower mold to fit together, and the descending pressure plate can drive the connecting rod to transmit, drive the two T-shaped sliders to move relative to each other, and finally drive the bent arm and the clamping block to move, insert into the interior of the sealing cylinder, and realize the clamping connection between the upper mold and the lower mold, thereby improving the overall automation of the device.

[0015] Preferably, both sides of the top of the upper mold are provided with sliding grooves, and the sliding grooves are slidably connected to the T-shaped slider. A first spring is connected between the T-shaped slider and the sliding groove. The sliding groove can guide the T-shaped slider to make it move in a straight line, thereby improving the stability of the overall movement of the clamping mechanism. At the same time, through the added first spring, after the T-shaped slider completes the movement, it is automatically driven to return to its position, thereby releasing the clamping state between the upper mold and the lower mold, greatly improving the automation of the device.

[0016] Preferably, the outside of the bending arm is connected to a guide arm, which is slidably connected to the upper mold. The guide arm can guide the bending arm so that it can only perform linear lateral movement during movement, thereby improving the stability of the clamping block when it is clamped.

[0017] Preferably, the top of the pressure plate is equipped with a connecting fastener, and the connecting fastener is connected to the output end of the output cylinder through a bolt, which facilitates the connection and transmission between the pressure plate and the base, and at the same time facilitates the release of the connection state with the base, thereby changing to different working states, greatly improving the overall automation of the device.

[0018] In summary, compared with the prior art, the present invention provides an eight-channel differential pressure airtight seal structure, which has the following beneficial effects: 1. The eight-channel differential pressure airtight seal structure uses eight additional sets of output cylinders. When the lower mold core fixes the workpiece to be tested, it drives the upper and lower molds to close the molds. Then, the airtightness tester is used to test the workpiece to be tested inside the lower mold, thereby achieving efficient switching tests. At the same time, it improves test efficiency and accuracy, and avoids the problem of air leakage when the device is testing the workpiece to be tested, which would reduce the accuracy of the data after the workpiece test. 2. The sealing structure of the eight-channel differential pressure airtight machine automatically seals the air inlet pipe when the workpiece is being tested through the added sealing cylinder, preventing the external gas from affecting the test data during the test, thereby greatly enhancing the stability and reliability of the equipment, ensuring good sealing performance even in high-pressure environments, improving test accuracy and application range, and reducing maintenance costs; 3. The sealing structure of the eight-channel differential pressure airtight machine can be replaced according to the different specifications of the workpiece to be tested by adding a lower mold and an upper mold, thereby expanding the scope of application. It can flexibly respond to the testing needs of products of different specifications and shapes, greatly improving the overall applicability of the device, and thus reducing the economic losses caused by the need to replace devices of different specifications due to the problem of different workpiece sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front schematic diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the back side of the present invention.

[0021] Figure 3 It is a front schematic diagram of the air tightness tester of the present invention.

[0022] Figure 4 It is a schematic diagram of the back side of the air tightness tester of the present invention.

[0023] Figure 5 It is an enlarged schematic diagram of the base of the present invention.

[0024] Figure 6 It is a partial schematic diagram of the base of the present invention.

[0025] Figure 7It is a partial cross-sectional view of the base of the present invention.

[0026] Figure 8 It is an enlarged schematic diagram of the upper mold of the present invention.

[0027] Figure 9 It is an enlarged schematic diagram of the clamping mechanism of the present invention.

[0028] Description of reference numerals: 1. Aluminum frame; 11. Casters; 12. Foot pads; 13. Cabinet door; 14. Pressure reducing valve plate; 15. Three-color light; 16. Control panel; 17. Grating plate; 2. Air tightness tester; 21. Test host; 22. Touch screen; 23. Control buttons; 24. Pressure regulating valve; 25. Output port; 26. Input port; 27. Test port; 28. Filter; 3. Control module; 4. Sliding bottom plate; 41. Cylinder bracket; 5. Output cylinder; 6. Base; 61. Lower mold; 62. Lower mold core; 63. Air inlet pipe; 64. Sealing cylinder; 65. Workpiece to be measured; 66. Limit groove; 7. Upper mold; 71. Slide groove; 72. Gas inlet; 8. Clamping mechanism; 81. Pressing plate; 82. Connecting rod; 83. T-shaped slider; 84. First spring; 85. Second spring; 86. Bending arm; 87. Guide arm; 88. Block; 89. Connecting fastener. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] Example 1 See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , an eight-channel differential pressure airtight machine sealing structure, including an aluminum frame 1, an airtightness tester 2, a control module 3 and a sliding bottom plate 4, the airtightness tester 2 and the control module 3 are respectively assembled on the internal top of the aluminum frame 1, the sliding bottom plate 4 is assembled in the inner cavity of the aluminum frame 1, the airtightness tester 2 includes a test host 21, and the test host 21 is embedded in the interior of the aluminum frame 1, the front of the test host 21 is evenly provided with a pressure regulating valve 24, the front of the test host 21 is evenly provided with a control button 23, the front of the test host 21 is embedded with a touch screen 22, the other end of the test host 21 is embedded with an output port 25, and the outside of the test host 21 is equipped with an input port 26, the back of the test host 21 is equipped with a filter 28, and the back of the test host 21 is evenly provided with test ports 27.

[0031] See also Figure 5 and Figure 6 , cylinder brackets 41 are evenly distributed on the top of the lower sliding base plate 4, and the output cylinder 5 is inserted into the inside of the cylinder bracket 41, and the output end of the output cylinder 5 is connected to the upper mold 7, and the base 6 is evenly distributed on the top of the lower sliding base plate 4, and the upper end surface of the base 6 is connected to the lower mold 61 on both sides, the upper end surface of the lower mold 61 is embedded with a lower mold core 62, and the interior of the lower mold core 62 is equipped with an air intake pipe 63, the outside of the lower mold 61 is equipped with a sealing cylinder 64, and the output end of the sealing cylinder 64 is in contact with the air intake pipe 63, the telescopic end of the sealing cylinder 64 is equipped with a sealing plug made of PVC material, and the interior of the lower mold 61 is equipped with a workpiece 65 to be measured.

[0032] The workpiece 65 to be tested in this solution is a long workpiece with a cavity inside. The device detects the internal cavity of the workpiece 65 to be tested on the device. The outer end of the workpiece 65 to be tested is in a sealed state, so its exposed exterior does not need to be tested or sealed.

[0033] The aluminum frame 1 is assembled into a whole by multiple sets of side panels on the outside of the frame, which is used to support and fix the internal parts. The aluminum frame 1 is an aluminum alloy structure. The airtightness tester 2 is a common airtightness test device in the prior art, which is used to cooperate with the base 6 and the upper mold 7 to detect the airtightness of the workpiece. The internal structure of the test host 21 includes memory, CPU and power supply, etc. The touch screen 22 is convenient for the staff to control the test host 21 to work and thus detect the workpiece. The control button 23 is convenient for the staff to control the test host 21 to the empty seat state. The pressure regulating valve 24 can adjust the pressure. The pressure inside the device is regulated, the output port 25 and the input port 26 can transmit the data inside the device, the test port 27 facilitates the air tightness tester 2 to detect the workpiece as a whole, the lower sliding base plate 4 is assembled inside the aluminum frame 1, and is used to support the output cylinder 5, the output cylinder 5 can drive the upper mold 7 to move, and then close the mold with the lower mold 61 to detect the workpiece 65 to be tested inside, the air inlet pipe 63 can discharge the airflow generated by the air tightness tester 2 into the interior of the base 6 to detect the workpiece 65 to be tested, and the sealing cylinder 64 can move to close the air inlet pipe 63.

[0034] The air tightness tester 2 is equipped with an air pump inside. The compressed air is first input into the gas inlet 72 through the internal control equipment, and then input into the inside of the air inlet through the gas inlet 72, and then the gas is supplied to the inner cavity of the workpiece 65 to be tested. After the air supply is completed, the sealing cylinder 64 is inserted into the inner cavity of the air inlet, so that the air inlet is sealed by the sealing plug. The air inlet 63 cooperates with the horizontal pipe on the right to form an air path inside the lower mold 61. The initial state of the air inlet is open. At this time, the air path inside the lower mold 61 is also in an open state. When the sealing cylinder 64 is inserted into the inside of the air inlet, the air inlet will be closed. At this time, the air path is sealed, and the inner cavity of the lower mold 61 forms a sealed space.

[0035] The upper mold 7 and the lower mold 61 adopt an insert structure to locally optimize the sealing performance, and an exhaust groove is set on the outside of the lower mold 61. The exhaust groove is sealed when not in use. The exhaust groove is set to allow air to be discharged smoothly during the injection molding process.

[0036] The contact surface between the lower mold 61 and the upper mold 7 is provided with a pressure sensor, and the pressure inside the lower mold 61 is detected by the pressure sensor. An O-ring and a metal sealing gasket combination are provided between the contact surfaces of the lower mold 61 and the upper mold 7. At the same time, the lower mold 61 and the upper mold 7 are reinforced by bolt fixing and snap connection to improve the airtightness of the lower mold 61 and the upper mold 7. The outside of the lower mold 61 is equipped with a pressure relief valve and a vacuum breaking device, and multi-level pressure protection is set. A pressure differential sensor is provided on the outside of the air inlet to monitor the pressure in real time. At the same time, the workpiece 65 to be tested is detected to determine whether it is in a sealed state.

[0037] The detection principle of this solution is based on the differential pressure method, which detects leaks by comparing the gas pressure inside and outside the workpiece 65 to be tested. The specific steps are as follows: First, the air tightness tester 2 fills the workpiece 65 to be tested with gas at a certain pressure; then, the pressure regulating valve is closed and the air flow is stabilized, so that the air pressure inside and outside the workpiece 65 to be tested reaches a balanced state; finally, the air tightness tester 2 monitors the air pressure difference between the inside and outside of the workpiece 65 to be tested. If the difference is zero or within an allowable range, it means that the workpiece 65 to be tested is qualified; if the difference exceeds the allowable range, it is judged to be unqualified. The principle of the differential pressure method is to use the gas pressure difference to reflect the sealing performance of the workpiece 65 to be tested. By accurately measuring the pressure difference, it can be accurately determined whether the workpiece 65 to be tested is leaking.

[0038] See also Figure 7 A gas inlet 72 is provided inside the upper mold 7 .

[0039] See also Figure 1 and Figure 2The four corners of the bottom of the aluminum frame 1 are evenly distributed with casters 11 and foot pads 12, and the bottom of the foot pads 12 are equipped with rubber pads. The casters 11 facilitate the movement of the aluminum frame 1 when not in use, and then facilitate the transportation and storage of the entire device. The foot pads 12 can be manually changed in height by the staff, and then support the aluminum frame 1 when in use, thereby greatly improving the stability of the aluminum frame 1 when in use, and improving the stability of the casters 11 when the aluminum frame 1 is in use.

[0040] Both sides of the front of the aluminum frame 1 are equipped with cabinet doors 13 through hinges, and the inner cavity of the aluminum frame 1 is equipped with gas cylinders and pneumatic triplet parts. The cabinet doors 13 can seal the chamber inside the aluminum frame 1, thereby protecting the device inside the inner cavity of the aluminum frame 1. At the same time, a chamber is opened at the inner bottom of the aluminum frame 1, which can be used to store parts required by the device in the working state, as well as processing parts required by the device during processing.

[0041] The top of the aluminum frame 1 is equipped with a three-color light 15, the front of the aluminum frame 1 is equipped with a control panel 16, and the top of the control panel 16 is evenly distributed with control buttons. The three-color light 15 can display the working status of the aluminum frame 1 and alarm the staff in an emergency situation. At the same time, the control panel 16 can control the mechanical components inside the aluminum frame 1 and start and stop the work through external control buttons, thereby greatly improving the safety performance and working stability of the aluminum frame 1.

[0042] Pressure reducing valve plates 14 are embedded on both sides of the aluminum frame 1, and square holes are evenly opened on the outside of the pressure reducing valve plates 14. Grating plates 17 are evenly distributed on the outside of the aluminum frame 1, and the outside of the grating plates 17 is polished with rounded corners. The pressure reducing valve plates 14 can protect the internal components of the device, and at the same time are convenient for disassembly from the aluminum frame 1, and then the internal components of the aluminum frame 1 can be maintained and repaired, greatly improving the stability and maintenance speed of the device during use. At the same time, the grating plates 17 can isolate and protect the device and external staff. The rounded grating plates 17 avoid collision damage with the staff, thereby protecting the device and the staff.

[0043] Limiting grooves 66 are provided on both sides of the outside of the lower mold 61. The lower mold 61 is connected to the base 6 by bolts. The limiting grooves 66 facilitate the clamping between the lower mold 61 and the upper mold 7. At the same time, the lower mold 61 connected by bolts is convenient for disassembly and maintenance from the top of the base 6, thereby improving the overall use effect of the device and avoiding the normal use of the device being affected by long-term disassembly.

[0044] After the lower mold 61 and the upper mold 7 are closed, the staff pre-fixes the device through a snap connection, and then reinforces it with matching bolts for a second time, thereby improving the internal airtightness and preventing gas leakage.

[0045] During the process of inflating the object under test, the internal pressure will not saturate and stabilize until a certain period of time has passed. Therefore, the test time is determined by the product volume. The larger the product volume, the longer the inflation time is required. The test time may need to be extended appropriately when the test pressure is high, the volume of the object under test is large, the surface area of ​​the object under test is small, the leakage is small, there is pressure deformation at the seal between the object under test and the fixture, and there is a temperature difference between the object under test and the ambient temperature, air temperature, and fixture temperature.

[0046] The instrument isolates the air heat exchange between the test piece and the reference part, and only after the temperature and airflow stabilize can it detect the pressure difference between the test end and the reference end. This process not only stabilizes the flow and pressure, but also detects and determines whether there are major leaks. It also constrains the reasonable range of major leaks based on the input balance upper and lower limits, thereby ensuring the accuracy of the next measurement data. The larger the product volume, the longer the airflow, pressure, and temperature require to stabilize. Generally, the balance time is approximately half the inflation time: balance time = inflation time × 0.3-0.6. For example, if the inflation time is 20 seconds, a balance stabilization time of 6-10 seconds is generally selected.

[0047] Measure the small leakage △P within a certain period of time, and judge and record the test results according to the set upper and lower leakage limit parameters. In simple terms, it is to use the test time setting value and leakage judgment value of the air tightness tester to simply and effectively distinguish unqualified products from qualified products. If the leakage value of qualified products measured in 5s is 5Pa and the leakage value of defective products measured is 11Pa, it is not easy to distinguish qualified products from defective products. If the measurement time is set to 10s, the leakage value of qualified products can be measured to be 10Pa and that of defective products to be 22Pa. At this time, the leakage limit can be set to 15Pa, which can effectively distinguish defective products.

[0048] The upper mold 7 has an air inlet for introducing test gas. The lower mold 61 opens and cooperates with the sealing cylinder 64 to automatically close, thereby forming a sealed space. There are eight groups of output cylinders 5, which are divided into front and rear areas and can be switched according to test requirements.

[0049] There are eight groups of bases 6 and output cylinders 5, and two groups of lower molds 61 are set on the top of each group of bases 6. When the workpiece 65 to be tested is placed on the top of the lower mold 61 at one end, the inside of the other end can also be tested, thereby greatly improving the overall automation of the device.

[0050] The following are the data parameters to be set for the airtightness tester 2 in this device: Delay time: the time it takes for the fixture to clamp the product, with a setting range of 0.1-999.9 seconds.

[0051] Inflation time: the time to add pressure to the product, the setting range is 0.1-999.9 seconds.

[0052] Equilibrium time: the time to wait for the airflow to stabilize, the setting range is 0.1-999.9 seconds.

[0053] Measuring time: the time to detect product leakage, the setting range is 0.1-999.9 seconds.

[0054] Exhaust time: the time it takes to exhaust the gas, the setting range is 0.1-999.9 seconds.

[0055] The instrument starts to work after receiving the start signal. The delay after starting the instrument is the time to wait for the workpiece 65 to be clamped and stabilized. The workpiece 65 is inflated with air pressure. After a certain period of time, the internal pressure will be saturated and stable. The pressure regulating valve 24 inside the air tightness tester 2 is closed to form a closed loop for the leakage detection part, isolating the air heat exchange between the workpiece 65 to be tested and the standard part. After the temperature and airflow are stable, the pressure difference between the test end and the standard end is detected. This process is not only for stabilizing the flow and pressure, but also for detecting and determining whether there is a large leak, and constraining the reasonable range of the large leak according to the input balance upper and lower limits, so as to ensure the accuracy of the next measurement data, measure small leaks within a certain period of time, and determine and record the test results according to the set leakage upper and lower limit parameters, output a judgment signal of whether it is qualified or not, and discharge the residual pressure in the object being tested and the instrument.

[0056] By adding eight sets of output cylinders 5, when the lower mold core 62 fixes the workpiece 65 to be tested, the upper mold 7 is driven to close the lower mold 61, and then the airtightness tester 2 is used to test the workpiece 65 inside the lower mold 61, thereby achieving efficient switching testing and improving the test efficiency and accuracy. It avoids the problem of air leakage when the device is testing the workpiece 65, which would reduce the accuracy of the data after the workpiece test. The additional sealing cylinder 64 automatically seals the air inlet pipe 63 when the workpiece 65 is being tested, preventing the external gas from affecting the test data during the test of the workpiece 65, thereby greatly enhancing the stability and reliability of the equipment and ensuring good sealing performance even in a high-pressure environment. By adding the lower mold 61 and the upper mold 7, they can be replaced according to the different specifications of the workpiece 65 to be tested, thereby expanding the scope of application, and can flexibly respond to the testing needs of products of different specifications and shapes, greatly improving the overall applicability of the device, thereby reducing the economic losses caused by the need to replace devices of different specifications due to the problem of different workpiece sizes.

[0057] Example 2 See also Figure 8 and Figure 9 The difference between this embodiment and embodiment 1 is that: The top of the upper mold 7 is equipped with a clamping mechanism 8, which includes a pressing plate 81. The bottom of the pressing plate 81 is connected to a second spring 85, and the other end of the second spring 85 is connected to the upper mold 7. Both sides of the bottom of the pressing plate 81 are connected to connecting rods 82 through hinges. The bottom of the connecting rod 82 is connected to a T-shaped slider 83 through a hinge, and the outside of the T-shaped slider 83 is connected to a bent arm 86, and the other end of the bent arm 86 is connected to a clamping block 88. The clamping mechanism 8 can be driven to descend when the output cylinder 5 drives the upper mold 7 and the lower mold 61 to fit together. The descending pressing plate 81 can drive the connecting rod 82 for transmission, drive the two T-shaped sliders 83 to move relative to each other, and finally drive the bent arm 86 and the clamping block 88 to move and insert into the interior of the limit groove 66 to realize the clamping connection between the upper mold 7 and the lower mold 61, thereby improving the overall automation of the device and pre-fixing the device to facilitate subsequent reinforcement and sealing of the device by bolts.

[0058] Slide grooves 71 are provided on both sides of the top of the upper mold 7, and the slide grooves 71 are slidably connected to the T-shaped slider 83. A first spring 84 is connected between the T-shaped slider 83 and the slide groove 71. The slide groove 71 can guide the T-shaped slider 83 to move in a straight line, thereby improving the stability of the overall movement of the clamping mechanism 8. At the same time, through the added first spring 84, after the T-shaped slider 83 completes its movement, it is automatically driven to return to its position, thereby releasing the clamping state between the upper mold 7 and the lower mold 61, greatly improving the automation of the device.

[0059] The outside of the bending arm 86 is connected to a guide arm 87, which is slidably connected to the upper mold 7. The guide arm 87 can guide the bending arm 86 so that it can only move horizontally in a straight line during movement, thereby improving the stability of the clamping block 88 when it is clamped.

[0060] The top of the pressure plate 81 is equipped with a connecting fastener 89, and the connecting fastener 89 is connected to the output end of the output cylinder 5 by a bolt. The connecting fastener 89 is used to realize the connection between the output cylinder 5 and the clamping mechanism 8. 89 facilitates the connection and transmission between the pressure plate 81 and the base 6, and at the same time facilitates the release of the connection state with the base 6, thereby changing different working states and greatly improving the overall automation of the device.

[0061] By means of the additional clamping mechanism 8, the upper mold 7 and the lower mold 61 are automatically pre-fixed after they are closed, thereby improving the automation and fixing speed of the entire device.

[0062] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0063] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An eight-channel differential pressure airtight machine sealing structure, comprising an aluminum frame (1), an airtightness tester (2), a control module (3) and a lowering bottom plate (4), wherein the airtightness tester (2) and the control module (3) are respectively assembled on the inner top of the aluminum frame (1), and the lowering bottom plate (4) is assembled on the inner cavity of the aluminum frame (1), characterized in that: The air tightness tester (2) includes a test host (21), and the test host (21) is embedded in the interior of the aluminum frame (1), the front of the test host (21) is evenly provided with a pressure regulating valve (24), the front of the test host (21) is evenly equipped with a control button (23), the front of the test host (21) is embedded with a touch screen (22), the other end of the test host (21) is embedded with an output port (25), and the outside of the test host (21) is equipped with an input port (26), the back of the test host (21) is equipped with a filter (28), and the back of the test host (21) is evenly provided with test ports (27); The top of the lower sliding base plate (4) is evenly provided with a cylinder bracket (41), and the interior of the cylinder bracket (41) is plugged with an output cylinder (5), there are eight groups of output cylinders (5), which are divided into a front area and a rear area, the output end of the output cylinder (5) is connected to the upper mold (7), the top of the lower sliding base plate (4) is evenly provided with a base (6), and both sides of the upper end surface of the base (6) are connected to the lower mold (61), the upper end surface of the lower mold (61) is embedded with a lower mold core (62), and the interior of the lower mold core (62) is equipped with an air intake pipe (63), the exterior of the lower mold (61) is equipped with a sealing cylinder (64), and the output end of the sealing cylinder (64) is in contact with the air intake pipe (63), and the interior of the lower mold (61) is equipped with a workpiece to be measured (65); A gas inlet (72) is provided inside the upper mold (7).

2. The sealing structure of an eight-channel differential pressure airtight machine according to claim 1, characterized in that: Casters (11) and foot pads (12) are evenly distributed at the four corners of the bottom of the aluminum frame (1), and the bottoms of the foot pads (12) are equipped with rubber pads.

3. The sealing structure of an eight-channel differential pressure airtight machine according to claim 1, characterized in that: Both sides of the front of the aluminum frame (1) are equipped with cabinet doors (13) via hinges, and the inner cavity of the aluminum frame (1) is equipped with a gas cylinder and a pneumatic triplex.

4. The sealing structure of an eight-channel differential pressure airtight machine according to claim 1, characterized in that: The top of the aluminum frame (1) is equipped with a three-color lamp (15), the front of the aluminum frame (1) is equipped with a control panel (16), and the top of the control panel (16) is evenly distributed with control buttons.

5. The eight-channel differential pressure airtight seal structure according to claim 1, characterized in that: Pressure reducing valve plates (14) are embedded on both sides of the aluminum frame (1), and square holes are evenly opened on the outside of the pressure reducing valve plates (14). Grating plates (17) are evenly distributed on the outside of the aluminum frame (1), and the outside of the grating plates (17) is rounded and polished.

6. The eight-channel differential pressure airtight seal structure according to claim 1, characterized in that: Limiting grooves (66) are provided on both sides of the exterior of the lower mold (61), and the lower mold (61) is connected to the base (6) via bolts.

7. The eight-channel differential pressure airtight seal structure according to claim 1, characterized in that: The top of the upper mold (7) is equipped with a clamping mechanism (8), which includes a pressing plate (81), the bottom of the pressing plate (81) is connected to a second spring (85), and the other end of the second spring (85) is connected to the upper mold (7), both sides of the bottom of the pressing plate (81) are connected to connecting rods (82) through hinges, the bottom of the connecting rod (82) is connected to a T-shaped slider (83) through a hinge, and the outside of the T-shaped slider (83) is connected to a bent arm (86), and the other end of the bent arm (86) is connected to a clamping block (88).

8. The sealing structure of an eight-channel differential pressure airtight machine according to claim 7, characterized in that: Both sides of the top of the upper mold (7) are provided with a slide groove (71), and the slide groove (71) is slidably connected to the T-shaped slider (83), and a first spring (84) is connected between the T-shaped slider (83) and the slide groove (71).

9. The eight-channel differential pressure airtight seal structure according to claim 7, characterized in that: The outside of the bent arm (86) is connected to a guide arm (87), and the guide arm (87) is slidably connected to the upper mold (7).

10. The eight-channel differential pressure airtight seal structure according to claim 7, characterized in that: A connecting fastener (89) is assembled on the top of the pressure plate (81), and the connecting fastener (89) is connected to the output end of the output cylinder (5) via bolts.

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