Lifting mechanism of full-automatic air permeability tester

Abstract

The utility model relates to the field of paper air permeability detection instruments, in particular to a lifting mechanism of a full-automatic air permeability tester, which comprises a lower pressure plate, a pressure ring, a lower pressure plate seat, an air guide channel and an elastic adhesive film, the lifting mechanism enables the lower pressure plate to ascend through a thin film and air pressure, the required lifting path is short, the space can be saved to the maximum extent, and the design can not only quickly clamp a sample but also quickly clamp the sample. And the structure is simple and installation is easy.

Description

Technical Field

[0001] This utility model relates to the field of paper air permeability testing instruments, specifically, to a lifting mechanism for a fully automatic air permeability measuring instrument. Background Technology

[0002] In various industries such as papermaking, packaging, and cigarette manufacturing, the air permeability of insulating paper, paper tubes, and paperboard is a key indicator for measuring product quality, directly affecting product performance and user experience. Air permeability refers to the amount of air passing through a unit area sample (insulating paper, paper tubes, paperboard, etc.) per unit time under a certain pressure difference; it is one of the important physical indicators for measuring paper performance.

[0003] For example, in the printing process, the air permeability of paper directly affects the drying speed and adhesion of ink. The air permeability of coated paper (such as art paper and coated whiteboard paper) affects the uniformity and adhesion of the coating layer. Excessive air permeability in food packaging paper can lead to food being easily affected by moisture, oxidation, or microbial contamination; insufficient air permeability may accelerate food spoilage due to the inability to exchange gases within the packaging (e.g., hindering the respiration of fresh fruits and vegetables). The air permeability of industrial packaging paper (such as cardboard base paper and moisture-proof paper) affects its moisture-proof and dust-proof performance. For example, packaging paper for transporting precision instruments or electronic products needs low air permeability to isolate external moisture and dust. In the tobacco industry, excessively high air permeability in cigarette paper can cause cigarettes to burn too quickly, affecting the smoking experience; insufficient air permeability may lead to incomplete combustion and the production of excessive harmful components. Excessively high air permeability in filter paper (such as coffee filters and oil filters) can lead to incomplete filtration; insufficient air permeability may affect the passage of liquids or gases due to excessive resistance.

[0004] Therefore, it is necessary to monitor the air permeability of various types of paper or paperboard. Consequently, it is necessary to design a fully automatic air permeability tester with a high degree of functionality. Such testers often include upper and lower pressure plates to clamp the sample. Currently, most air permeability testers use manual sample clamping, while the automatic sample clamping structure of the air permeability tester, similar to that described in this application, is often complex in design and occupies a large amount of space. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a lifting mechanism for a fully automatic air permeability measuring instrument.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A lifting mechanism for a fully automatic air permeability tester includes a lower pressure plate, a pressure ring, a lower pressure plate base, an air guide channel, and an elastic membrane. The lower pressure plate base has a groove inside, with a ring island at the bottom of the groove. The elastic membrane is detachably placed on the ring island and forms an air guide chamber with the bottom of the groove. The pressure ring is a hollow cylinder and is detachably placed on the elastic membrane. The lower pressure plate is positioned in the hollow part of the pressure ring, directly opposite the upper pressure plate. The air guide channel is located below the groove of the lower pressure plate base, with one end connected to the air guide chamber and the other end connected to the outside of the lower pressure plate base.

[0008] Preferably, the lower pressure plate seat, elastic diaphragm, and pressure ring are fixed by bolt connection.

[0009] Preferably, the lower pressure plate is provided with an exhaust hole and an exhaust channel. The exhaust hole penetrates the upper surface of the lower pressure plate and communicates with the exhaust channel. The exhaust channel is located inside the lower pressure plate and extends horizontally to communicate with the outside of the lower pressure plate.

[0010] Preferably, the upper surface of the pressure plate is provided with concentric circular grooves, and the top of the cross-section of the pressure plate is serrated.

[0011] Preferably, the lifting mechanism is detachably installed inside the base of the air permeability measuring instrument, and the upper surface of the lifting mechanism is flush with the upper surface of the base.

[0012] Preferably, the base is also provided with a push rod at the rear, and the front end of the push rod is detachably connected to the air guide channel.

[0013] Preferably, the air guide channel extends outward with a connecting component, and a connecting hole is provided in the middle of the front end of the push rod, so that the connecting component can be mortised and tenoned with the connecting hole.

[0014] Preferably, an upper pressing mechanism is separately provided above the lifting mechanism, the upper pressing mechanism including an upper pressing plate and a lower pressing plate corresponding to the position of the upper pressing plate.

[0015] Preferably, a sealing ring is provided between the upper pressure plate and the lower pressure plate.

[0016] This utility model provides a lifting mechanism for a fully automatic air permeability tester. The lifting mechanism raises the lower pressure plate through a membrane and air pressure. The required lifting path is short and can save space to the maximum extent. This design can quickly clamp the sample and is simple in structure and easy to install. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of an air permeability measuring instrument.

[0018] Figure 2 This is the second schematic diagram of the air permeability measuring instrument.

[0019] Figure 3 This is the third schematic diagram of the air permeability measuring instrument.

[0020] Figure 4 This is a schematic diagram of the lifting mechanism.

[0021] Figure 5 This is a top view of the lifting mechanism.

[0022] Figure 6 for Figure 5 AA cross-sectional view of the lifting mechanism.

[0023] Figure 7 This is a schematic diagram of the lower pressure plate.

[0024] Figure 8 for Figure 7 CC cross-section of the lower pressure plate.

[0025] Figure 9 This is a schematic diagram of the upper pressure plate. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] A fully automatic air permeability measuring instrument employing the lifting mechanism of this application, such as Figure 1-3 As shown, the air permeability measuring instrument includes a pressure-raising mechanism, a lifting mechanism, an air source mechanism, a flow monitoring mechanism, and a support body. The support body forms the frame of the air permeability measuring instrument and is used for the installation and fixation of various components; the air source mechanism is mainly responsible for air processing and flow rate adjustment; the flow monitoring mechanism is mainly responsible for detecting air flow data; the pressure-raising mechanism and the lifting mechanism work together to mainly fix the sample and assist in the measurement of air permeability.

[0029] The main support includes a housing 11, a support plate 12, and a base 13. The support plate 12 is detachably fixed above the base 13.

[0030] The air source mechanism includes an air source processing element 41, a fluid control valve 42, and a precision pressure regulating valve 43. In this embodiment, the air source processing element 41 is fixed outside the rear cover of the housing 11, and can filter air, remove oil and water from the air, and regulate air flow. The fluid control valve 42 and the precision pressure regulating valve 43 are fixed inside the rear cover of the housing 11, and the knob of the precision pressure regulating valve 43 is located outside the rear cover of the housing 11 for precise adjustment of air flow. The air source processing element 41 is connected to the fluid control valve 42, the fluid control valve 42 is connected to the precision pressure regulating valve 43 through a pipe, the precision pressure regulating valve 43 is connected to the flow sensor 51 through a pipe, the flow sensor 51 is connected to the support plate 12 through a pipe, and the pressure sensor is set on the support plate 12 (the pipes are not shown in the figure).

[0031] The flow monitoring mechanism includes a flow sensor 51 and a pressure sensor. The flow sensor 51 is fixed inside the rear cover of the housing 11, and the pressure sensor (not shown in the figure) is fixed in the hole of the support plate 12 leading to the upper pressure plate 21. The flow sensor 51 measures the air flow and the pressure difference on both sides of the sample, respectively.

[0032] The upper pressing mechanism includes an upper pressing plate 21, which is detachably fixed to the bottom of the support plate 12. For example... Figure 9 As shown, the upper pressure plate 21 has a hole for air to pass through, which can be located at the center of the upper pressure plate 21. The support plate 12 has a corresponding hole, on which a pressure sensor and a pipe for air circulation are installed.

[0033] The lifting mechanism includes a lower pressure plate 31, a pressure ring 32, a lower pressure plate seat 33, an air guide channel 34, and an elastic diaphragm 35. The lower pressure plate seat 33 is detachably and pull-outly mounted on the base 13. Figure 5 , 6 As shown, the lower pressure plate seat 33 has a groove inside, and a ring island is provided at the bottom of the groove. The elastic diaphragm 35 can be detachably placed on the ring island to form an air guide chamber 36 with the bottom of the groove. The pressure ring 32 is a hollow cylinder and can be detachably placed on the elastic diaphragm 35 to press the elastic diaphragm 35 and prevent it from shifting. The elastic diaphragm 35 and the pressure ring 32 are fixed in the groove of the lower pressure plate seat 33 by bolts. The lower pressure plate 31 is placed in the hollow position of the pressure ring 32, directly opposite the upper pressure plate 21. A sealing ring is provided between the upper pressure plate 21 and the lower pressure plate 31. Figure 4 , 6 As shown, the air guide channel 34 is located below the groove of the lower pressure plate seat 33 and extends horizontally. One end of the air guide channel 34 is connected to the air guide chamber 36, and the other end is connected to the outside of the lower pressure plate seat 33.

[0034] like Figure 7 , 8As shown, the lower pressure plate 31 is provided with an exhaust hole 311 and an exhaust channel 312. The exhaust hole 311 penetrates the upper surface of the lower pressure plate 31 and communicates with the exhaust channel 312. The exhaust hole 311 is located at the center of the lower pressure plate 31, corresponding to the hole at the center of the upper pressure plate 21. The exhaust channel 312 is located inside the lower pressure plate 31 and extends horizontally. One end of the exhaust channel 312 connects to the exhaust hole 311, and the other end connects to the outside of the side of the lower pressure plate 31. A U-shaped groove is carved along the side wall of the lower pressure plate 31 towards the upper surface of the lower pressure plate 31. One end of the U-shaped groove connects to the exhaust channel 312, and the other end connects to the outside of the upper surface of the lower pressure plate 31. This structure allows air to pass through the exhaust hole 311 to the outside of the upper pressure mechanism. The upper surface of the lower pressure plate 31 is also provided with concentric circular grooves, and the top of the cross-section of the lower pressure plate 31 is serrated. In addition, the upper surface of the lower pressure plate 31 is also provided with a strip-shaped groove that passes through the center direction.

[0035] like Figure 2 As shown, a push rod 131 can also be installed at the rear of the base 13. The end of the push rod 131 near the lower pressure plate seat 33 is the front end, and a connecting hole is provided in the middle of its front end. The connecting hole can be connected to an air pipe (not shown in the figure). The air guide channel 34 can extend a portion to the outside of the lower pressure plate seat 33 to form a connecting component. The outer diameter of this connecting component should be smaller than the inner diameter of the connecting hole on the push rod 131. The lower pressure plate seat 33 can then be detachably connected to the push rod 131 through the connecting component of the air guide channel 34 and the connecting hole on the push rod 131. When the lower pressure plate seat 33 is connected to the push rod 131 and placed on the base 13, a certain gap is left between the rear end of the push rod 131 and the rear cover of the housing 11. After the sample test is completed, the rear end of the push rod 131 can be pushed forward to make the rear end of the push rod 131 fit tightly with the rear cover of the housing 11. At this time, the lower pressure plate seat 33 is moved out of the base 13.

[0036] A cover 6 is provided around the upper pressure plate 21. The cover 6 is fixed to the bottom of the support plate 12 and forms a fence on the front and left and right sides of the upper pressure plate 21. The cover 6 can be a glass cover.

[0037] The air permeability meter is also equipped with a display screen 7 at the front end for operating the instrument.

[0038] The air permeability tester is equipped with a printer 8 on top. The main body of the printer 8 is located inside the housing 11, and part of it is located outside the housing 11. It can print test results.

[0039] The following is an example of experimental data designed for a fully automated air permeability meter to evaluate its performance and support the description of the invention's effects:

[0040] 1. Experimental Objective

[0041] The air permeability of different types of samples was tested.

[0042] 2. Experimental parameters

[0043] Sample specifications:

[0044] A4 printing paper: 80g / m² thickness, φ6cm round sample, flat and without creases;

[0045] Coated paper: 157g / m² thickness, φ6cm circular sample, uniform coating, no pores;

[0046] Kraft paper: 200g / m² thickness, φ6cm circular sample, taken from a flat part of the carton;

[0047] Qualitative filter paper: φ6cm circular sample.

[0048] 3. Test conditions:

[0049] Test air pressure: 20.0 kPa;

[0050] Gas source pressure: 0.2 MPa;

[0051] Number of tests: 5;

[0052] Test environment: (20±10)℃, ≤80%RH.

[0053] 4. Experimental Data

[0054]

[0055] All test results were within the instrument's measurement range (≤100 μm / (Pa・s)) with a standard deviation of less than 5%, meeting the repeatability requirements.

[0056] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A full-automatic air permeability tester lifting mechanism, characterized in that, The lifting mechanism includes a lower pressure plate (31), a pressure ring (32), a lower pressure plate seat (33), an air guide channel (34), and an elastic diaphragm (35). The lower pressure plate seat (33) has a groove inside, and a ring island is provided at the bottom of the groove. The elastic diaphragm (35) can be detachably placed on the ring island to form an air guide chamber (36) with the bottom of the groove. The pressure ring (32) is a hollow cylinder. The pressure ring (32) can be detachably placed on the elastic diaphragm (35). The lower pressure plate (31) is placed in the hollow position of the pressure ring (32) and faces the upper pressure plate (21). The air guide channel (34) is located below the groove of the lower pressure plate seat (33), with one end connected to the air guide chamber (36) and the other end connected to the outside of the lower pressure plate seat (33).

2. The lifting mechanism of the full-automatic air permeability tester according to claim 1, characterized in that, The lower pressure plate seat (33), elastic diaphragm (35), and pressure ring (32) are fixed by bolt connection.

3. The lifting mechanism of the full-automatic air permeability tester according to claim 1, characterized in that, The lower pressure plate (31) is provided with an exhaust hole (311) and an exhaust channel (312). The exhaust hole (311) penetrates the upper surface of the lower pressure plate (31) and communicates with the exhaust channel (312). The exhaust channel (312) is located inside the lower pressure plate (31) and extends horizontally to communicate with the outside of the lower pressure plate (31).

4. The lifting mechanism of the full-automatic air permeability tester according to claim 1, characterized in that, The upper surface of the pressure plate (31) is provided with concentric circular grooves, and the top of the cross-section of the pressure plate (31) is serrated.

5. The lifting mechanism of the full-automatic air permeability tester according to claim 1, characterized in that, The lifting mechanism is detachably installed inside the base (13) of the air permeability measuring instrument, and the upper surface of the lifting mechanism is flush with the upper surface of the base (13).

6. The lifting mechanism of the full-automatic air permeability tester according to claim 5, characterized in that, The base (13) is also provided with a push rod (131) at the rear, and the front end of the push rod (131) is detachably connected to the air guide channel (34).

7. The lifting mechanism of the full-automatic air permeability tester according to claim 6, characterized in that, The air guide channel (34) extends outward with a connecting component, and the push rod (131) has a connecting hole in the middle of its front end. The connecting component can be mortised and tenoned with the connecting hole.

8. The lifting mechanism of the full-automatic air permeability tester according to claim 1, characterized in that, An upper pressing mechanism is separately provided above the lifting mechanism. The upper pressing mechanism includes an upper pressing plate (21) and a lower pressing plate (31) which is positioned opposite to the upper pressing plate (21).

9. The lifting mechanism of the full-automatic air permeability tester according to claim 1, characterized in that, A sealing ring is provided between the upper pressure plate (21) and the lower pressure plate (31).

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