Testing device for measuring aperture of ultra-small micropore

Abstract

The utility model relates to the technical field of micropore aperture measurement and metering, and discloses a testing device for measuring the aperture of an ultra-small micropore, which comprises a sealed box body, a measuring space for measuring the aperture of the ultra-small micropore is arranged in the sealed box body, and a vertically arranged partition plate is arranged in the measuring space. The partition plate divides the measuring space into a positive ionization chamber and a negative ionization chamber, a clamp used for clamping a measured object is arranged in the middle of the partition plate, and the positive ionization chamber and the negative ionization chamber are located on the two sides of the measured object respectively and apply positive and negative charges to the measured object. The two sides of the sealed box body are respectively provided with an electric wire extending to the corresponding positive ionization chamber and negative ionization chamber, and the electric wires are electrically connected with a charge sensor used for measuring the directional flow charge quantity of the measured object. According to the utility model, an accurate and reliable measurement result can be obtained for an ultra-microporous object to be measured, and important data support is provided for the aspects of medicine packaging material sealing positive samples, material performance evaluation, filtering effect optimization and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of micropore diameter measurement and metrology, specifically to a testing device for measuring the diameter of ultra-small micropores. Background Technology

[0002] Micropore size measurement is a common technique in materials science, biology, medicine, and the preparation of positive samples for pharmaceutical packaging seal integrity. Accurate measurement of micropore size allows for the analysis and evaluation of material properties, filtration efficiency, and adsorption capacity. Commonly used micropore size measurement methods include microscopy, mercury porosimetry, and media flow rate methods.

[0003] Microscopy is a simple and intuitive method for measuring micropore size. By placing the sample under a microscope, the structure and morphology of the micropore surface can be directly observed. However, microscopy can only observe surface pore size; it cannot measure the micropore size of objects with long or deep, opaque pore channels, nor can it measure micropores smaller than 2µm.

[0004] Meanwhile, mercury intrusion porosimetry (MIP) is a method that uses pressure to force mercury into the interior of a microporous material, and then calculates the pore size based on the amount of mercury intruded. MIP can measure a wide range of pore sizes and can simultaneously measure parameters such as pore depth and pore morphology. However, MIP requires a large amount of mercury and has a long measurement time, making it unsuitable for small samples and precise testing requirements.

[0005] In addition, the media flow rate method utilizes equipment such as vacuum pumps or air compressors to create a pressure or concentration difference across the leak sample, causing the medium to flow from the inlet to the outlet of the leak, thus generating a leak rate. Factors affecting the leak rate include the type of medium, inlet pressure, outlet pressure, and temperature of the medium. However, due to interference from the testing environment and limitations of the flow meter, the media flow rate method cannot measure ultramicropores.

[0006] Therefore, in summary, there is an urgent need for a testing device capable of measuring the pore size of ultra-micropores, which can obtain accurate and reliable measurement results and provide important data support for positive samples of the sealing performance of pharmaceutical packaging materials, material performance evaluation, and optimization of filtration effects. Utility Model Content

[0007] The present invention aims to provide a testing device for measuring the pore size of ultra-small micropores, which can obtain accurate and reliable measurement results, and provide important data support for positive samples of sealing performance of pharmaceutical packaging materials, material performance evaluation, and filtration effect optimization.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] 1) A testing device for measuring the diameter of ultra-small micropores, comprising a sealed housing, wherein the sealed housing has a measuring space for measuring the diameter of ultra-small micropores, the measuring space has a vertically arranged partition plate that divides the measuring space into a positive ionization chamber and a negative ionization chamber, a clamp for holding the test object is located at the middle of the partition plate, the positive ionization chamber and the negative ionization chamber are respectively located on both sides of the test object and apply positive and negative charges to the test object, and each side of the sealed housing has a wire extending to the corresponding positive ionization chamber and negative ionization chamber, the wire being electrically connected to a charge sensor for measuring the amount of directional flow charge of the test object.

[0010] The above technical solution utilizes a sealed enclosure to create separate sealed environments for the positive and negative ionization chambers. Under an electric field, both chambers are kept at a high voltage. The object to be tested is fixed to the partition plate, which is made of insulating material, with the two ends of the object located within the positive and negative ionization chambers, respectively. When the positive and negative ionization chambers are under high voltage, a directional microcurrent is generated within the object. The charge generated by this microcurrent is transmitted to a charge sensor via wires on both sides of the sealed enclosure. The charge sensor measures the intensity of the electric field on the object to determine its charge quantity. The pore size of the object is then obtained based on the charge quantity. This provides accurate and reliable measurement results for objects with ultra-micropores, offering crucial data support for positive samples of pharmaceutical packaging material sealing, material performance evaluation, and filtration effect optimization.

[0011] 2) A testing device for measuring the pore size of ultra-small micropores as described in 1), wherein:

[0012] A positive electrode wire extending into the positive ionization chamber is fixed to the side of the sealed housing near the positive ionization chamber, and a negative electrode wire extending into the negative ionization chamber is fixed to the side of the sealed housing near the negative ionization chamber. The negative electrode wire and the positive electrode wire are located on opposite sides of the charge sensor. The negative electrode wire is electrically connected to the sensing electrode of the charge sensor, and the positive electrode wire is electrically connected to the measuring electrode of the charge sensor.

[0013] In the above technical solution, the designed positive electrode wire extends through the sealed box to the positive ionization chamber, and the negative electrode wire extends through the sealed box to the negative ionization chamber. When the positive ionization chamber is filled with positive charge and the negative ionization chamber is filled with negative charge, the pore of the test object located on the separator plate connects the positive ionization chamber and the negative ionization chamber. Therefore, under the action of positive and negative charges, a microcurrent is generated in the pore of the test object and passes through the test object.

[0014] The generated microcurrent is sensed by the positive and negative wires and transmitted to the charge sensor, which directly determines the charge of the measured object.

[0015] 3) A testing device for measuring the pore size of ultra-small micropores as described in 2), wherein:

[0016] The side wall of the sealed enclosure is provided with a positive power source facing the positive ionization chamber, which is used to deliver positive charges into the positive ionization chamber. The side wall of the sealed enclosure is provided with a negative power source facing the negative ionization chamber, which is used to deliver negative charges into the negative ionization chamber.

[0017] In the above technical solution, a positive power supply is used to supply positive power to the positive ionization chamber, so that the medium in the positive ionization chamber is in an ionized state under high voltage; a negative power supply is used to supply negative power to the negative ionization chamber, so that the medium in the negative ionization chamber is in an ionized state under high voltage. Therefore, electrons in the positive and negative ionization chambers move directionally through the micropores of the object under test in an electric field environment, generating a microcurrent, and then the amount of charge in the micropores is measured by a charge sensor.

[0018] 4) A testing device for measuring the pore size of ultra-small micropores according to 2), wherein:

[0019] A positive electrode detection hole communicating with the positive ionization chamber is provided on the side wall of the sealed box. The positive electrode detection hole is used for the positive electrode wire to pass through and extend into the positive ionization chamber. A negative electrode detection hole communicating with the negative ionization chamber is provided on the other side wall of the sealed box. The negative electrode detection hole is used for the negative electrode wire to pass through and extend into the negative ionization chamber.

[0020] In the above technical solution, the designed positive detection hole is used for the positive electrode wire to pass through and to fix the positive electrode wire, so that the positive electrode wire extends into the positive ionization chamber. The designed negative detection hole is used for the negative electrode wire to pass through and to fix the negative electrode wire, so that the negative electrode wire extends into the negative ionization chamber. At the same time, the negative electrode wire and the positive electrode wire cooperate to directly obtain the microcurrent of the object being measured, so as to obtain the charge of the object being measured through the charge sensor.

[0021] 5) A testing device for measuring the pore size of ultra-small micropores according to 1), wherein:

[0022] The clamp includes a clamping tube that passes through and is fixed to a partition plate. The central axis of the clamping tube is perpendicular to the central axis of the partition plate. The two ends of the clamping tube are located in the positive ionization chamber and the negative ionization chamber, respectively. The clamping tube has a clamping channel for clamping and fixing the object to be tested.

[0023] In the above technical solution, the clamping channel of the clamping tube allows the object to pass through and is clamped and fixed. Since the two ends of the clamping tube are located in the positive ionization chamber and the negative ionization chamber respectively, the two ends of the object passing through the clamping channel are located in the positive ionization chamber and the negative ionization chamber respectively, thereby forming a micro-current in the object and obtaining the amount of charge in the aperture of the object. In addition, the clamping tube is fixed by the partition plate to maintain the stability of the clamping tube, thereby achieving the stability of the measurement of the object.

[0024] 6) A testing device for measuring the pore size of ultra-small micropores according to 5), wherein:

[0025] The end of the clamping tube facing the positive ionization chamber is connected to a fixing head. The fixing head is located inside the positive ionization chamber and has a locking channel communicating with the clamping channel. The size of the fixing head is twice the size of the clamping tube.

[0026] In the above technical solution, a fixing head is used to fix the end of the test object located in the positive ionization chamber. In use, the test object is passed through the locking channel and inserted into the clamping channel. The test object is clamped synchronously by the fixing head and the clamping tube to maintain the stability of the test object. At the same time, the size of the fixing head is twice the size of the clamping tube. Therefore, the fixing head can stably fix the end of the test object located in the positive ionization chamber, thereby improving the stability of measuring the micropores of the test object.

[0027] 7) A testing device for measuring the pore size of ultra-small micropores according to 6), wherein:

[0028] A fixing ring is provided between the fixing head and the clamping tube. The fixing ring is sleeved on the end of the clamping tube facing the fixing head and surrounds the periphery of the clamping channel.

[0029] The above technical solution provides a fixed ring that stabilizes the connection between the fixed head and the clamping tube. Simultaneously, the fixed ring surrounds the clamping channel, maintaining the stability of the clamping channel's gripping of the object being measured.

[0030] Compared with the prior art, this utility model also has the following technical effects:

[0031] This invention provides a testing device for measuring the diameter of ultra-small micropores. In the positive and negative ionization chambers, the medium is ionized under high voltage. Electrons move directionally through the micropores under an electric field, generating a microcurrent, which is detected by charge sensors connected to the positive and negative ionization chambers via wires. The micropore diameter of the measured object is obtained from the data detected by the charge sensors. This solves the problem of measuring ultra-small micropores and has wide applications in materials science, pharmaceuticals, and medicine, particularly in the measurement of positive control standards for the sealing integrity of drug packaging during pharmaceutical research and production. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a testing device for measuring the diameter of ultra-small micropores according to this utility model.

[0033] Figure 2 for Figure 1 Sectional view of AA. Detailed Implementation

[0034] The following detailed description illustrates the specific implementation method:

[0035] The reference numerals in the accompanying drawings of the instruction manual include: 1. Sealed housing; 2. Positive electrode wire; 3. Charge sensor; 4. Negative electrode wire; 5. Positive ionization chamber; 6. Negative ionization chamber; 7. Positive electrode detection hole; 8. Negative electrode detection hole; 9. Positive electrode power supply; 10. Negative electrode power supply; 11. Fixing head; 12. Clamping tube; 13. Fixing ring; 14. Test object.

[0036] See the example. Figure 1 and Figure 2 As shown, this embodiment of a testing device for measuring the diameter of ultra-small micropores includes a sealed housing 1. The sealed housing 1 has a measurement space for measuring the diameter of ultra-small micropores. The measurement space has a vertically arranged partition plate that divides the measurement space into a positive ionization chamber 5 and a negative ionization chamber 6. A clamp for holding the test object 14 is located in the middle of the partition plate. The positive ionization chamber 5 and the negative ionization chamber 6 are located on both sides of the test object 14 and apply positive and negative charges to the test object 14, respectively. Each side of the sealed housing 1 has a wire extending to the corresponding positive ionization chamber 5 and negative ionization chamber 6. The wire is electrically connected to a charge sensor 3 for measuring the directional flow of charge on the test object 14.

[0037] In this embodiment, a sealed enclosure 1 is used to create sealed environments for the positive ionization chamber 5 and the negative ionization chamber 6. Under an electric field, the positive ionization chamber 5 and the negative ionization chamber 6 are in a high-voltage state. The test object 14 is fixed to the partition plate by a clamp, with the two ends of the test object 14 located in the positive ionization chamber 5 and the negative ionization chamber 6, respectively. When the positive ionization chamber 5 is filled with positive charge and the negative ionization chamber 6 is filled with negative charge, a directional microcurrent is formed in the test object 14. The charge generated by the microcurrent is transported to the charge sensor 3 by wires on both sides of the sealed cavity. In this embodiment, the sensor is not limited to the charge sensor 3; a current sensor can also be used. The charge sensor 3 can determine the charge of the test object 14 by measuring the intensity of the electric field of the test object 14. The pore size of the test object 14 can be obtained by measuring the charge of the test object 14. Accurate and reliable measurement results can be obtained for the test object 14 with ultra-micropores, providing important data support for positive samples of the sealing performance of pharmaceutical packaging materials, material performance evaluation, and filtration effect optimization.

[0038] More specifically, in this embodiment, a positive electrode wire 2 extending into the positive ionization chamber 5 is fixed on the side of the sealed housing 1 near the positive ionization chamber 5, and a negative electrode wire 4 extending into the negative ionization chamber 6 is fixed on the side of the sealed housing 1 near the negative ionization chamber 6. The negative electrode wire 4 and the positive electrode wire 2 are located on opposite sides of the charge sensor 3, respectively. The negative electrode wire 4 is electrically connected to the sensing electrode of the charge sensor 3, and the positive electrode wire 2 is electrically connected to the measuring electrode of the charge sensor 3.

[0039] The positive electrode wire 2 extends through the sealed housing 1 to the positive ionization chamber 5, and the negative electrode wire 4 extends through the sealed housing 1 to the negative ionization chamber 6. When the positive ionization chamber 5 is filled with positive charge and the negative ionization chamber 6 is filled with negative charge, the pore of the test object 14 located on the separator plate connects the positive ionization chamber 5 and the negative ionization chamber 6. Therefore, under the action of positive and negative charges, a microcurrent is generated in the pore of the test object 14 and passes through the test object 14.

[0040] The generated microcurrent is sensed by the positive wire 2 and the negative wire 4, and is transmitted to the charge sensor 3 by the positive wire 2 and the negative wire 4. The charge sensor 3 directly determines the amount of charge on the object being measured 14.

[0041] Meanwhile, in this embodiment, a positive power supply 9 facing the positive ionization chamber 5 is provided on the side wall of the sealed box. The positive power supply 9 is used to deliver positive charges into the positive ionization chamber 5. A negative power supply 10 facing the negative ionization chamber 6 is provided on the side wall of the sealed box. The negative power supply 10 is used to deliver negative charges into the negative ionization chamber 6.

[0042] The positive ionization chamber 5 is powered by the positive power supply 9, so that the medium in the positive ionization chamber 5 is in an ionized state under high voltage. The negative ionization chamber 6 is powered by the negative power supply 10, so that the medium in the negative ionization chamber 6 is in an ionized state under high voltage. Therefore, electrons in the positive ionization chamber 5 and the negative ionization chamber 6 move directionally through the micropores of the test object 14 under the electric field environment, generating a microcurrent. The amount of charge in the micropores of the test object is then measured by the charge sensor 3.

[0043] In addition, a positive detection hole 7 is provided on the side wall of the sealed box, which is connected to the positive ionization chamber 5. The positive detection hole 7 is used for the positive wire 2 to pass through and extend into the positive ionization chamber 5. A negative detection hole 8 is provided on the other side wall of the sealed box, which is connected to the negative ionization chamber 6. The negative detection hole 8 is used for the negative wire 4 to pass through and extend into the negative ionization chamber 6.

[0044] The positive detection hole 7 is designed to allow the positive wire 2 to pass through and fix the positive wire 2, so that the positive wire 2 extends into the positive ionization chamber 5. The negative detection hole 8 is designed to allow the negative wire 4 to pass through and fix the negative wire 4, so that the negative wire 4 extends into the negative ionization chamber 6. At the same time, the negative wire 4 and the positive wire 2 cooperate to directly obtain the micro current of the test object 14, so that the charge of the test object 14 can be obtained through the charge sensor 3.

[0045] Also see Figure 2 As shown, in this embodiment, the clamp includes a clamping tube 12, which passes through the partition plate and is fixed on the partition plate. The central axis of the clamping tube 12 is perpendicular to the central axis of the partition plate. The two ends of the clamping tube 12 are located in the positive ionization chamber 5 and the negative ionization chamber 6, respectively. The clamping tube 12 has a clamping channel for clamping and fixing the test object 14.

[0046] The clamping tube 12 is used to clamp and fix the object 14 through the clamping channel. Since the two ends of the clamping tube 12 are located in the positive ionization chamber 5 and the negative ionization chamber 6 respectively, the two ends of the object 14 passing through the clamping channel are located in the positive ionization chamber 5 and the negative ionization chamber 6 respectively, thereby forming a micro current in the object 14 and obtaining the amount of charge in the aperture of the object 14. In addition, the clamping tube 12 is fixed by the partition plate to maintain the stability of the clamping tube 12, thereby achieving the stability of the measurement of the object 14.

[0047] A fixing head 11 is connected to the end of the clamping tube 12 facing the positive ionization chamber 5. The fixing head 11 is located inside the positive ionization chamber 5 and has a locking channel communicating with the clamping channel. The size of the fixing head 11 is twice the size of the clamping tube 12. The fixing head 11 is used to fix the end of the test object 14 located in the positive ionization chamber 5. In use, the test object 14 is passed through the locking channel and inserted into the clamping channel. The fixing head 11 and the clamping tube 12 clamp the test object 14 simultaneously to maintain its stability. At the same time, the size of the fixing head 11 is twice the size of the clamping tube 12. Therefore, the fixing head 11 can stably fix the end of the test object 14 located in the positive ionization chamber 5, improving the stability of measuring the micropores of the test object 14.

[0048] Furthermore, in this embodiment, a fixing ring 13 is provided between the fixing head 11 and the clamping tube 12. The fixing ring 13 is sleeved on the end of the clamping tube 12 facing the fixing head 11, and the fixing ring 13 surrounds the periphery of the clamping channel. The designed fixing ring 13 can stabilize the connection between the fixing head 11 and the clamping tube 12, and at the same time, the fixing ring 13 surrounding the periphery of the clamping channel can maintain the clamping stability of the clamping channel for the object 14 to be measured.

[0049] In operation, a medium is supplied to the positive ionization chamber 5 and the negative ionization chamber 6. Within these chambers, the medium is ionized under a high voltage. Electrons move directionally through the micropores under the electric field, generating a microcurrent, which is detected by the charge sensor 3 connected to the positive and negative ionization chambers 5 and 6 via wires. The pore size of the measured object 14 is obtained from the data detected by the charge sensor 3. This solves the problem of measuring ultra-small micropores and is widely used in materials science, pharmaceuticals, and medicine, particularly in the measurement of positive control standards for the integrity of drug packaging seals during drug research and production.

[0050] The above are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A test device for measuring the pore size of ultra small pores, characterized by, The utility model provides a kind of sealed box, the sealed box has measuring space for measuring ultra-small micropore aperture in, the measuring space has the partition plate vertically arranged in, the partition plate is divided into positive ionization chamber and negative ionization chamber, the partition plate has the fixture for clamping measured object in middle position, the positive ionization chamber and negative ionization chamber are located at the two sides of measured object respectively and apply positive and negative charge to measured object, the sealed box has electric wire extending to corresponding positive ionization chamber and negative ionization chamber respectively in the two sides, and the electric wire is electrically connected with charge sensor for measuring the amount of charge of measured object directional flow.

2. The test device for measuring the pore size of ultra-small pores according to claim 1, characterized in that: The sealed box is fixed with positive electrode wire extending to positive ionization chamber near the side of positive ionization chamber, and is fixed with negative electrode wire extending to negative ionization chamber near the side of negative ionization chamber, and the negative electrode wire and positive electrode wire are located at the two sides of charge sensor respectively, and the negative electrode wire is electrically connected with sensing electrode of charge sensor, and the positive electrode wire is electrically connected with measuring electrode of charge sensor.

3. The test device for measuring the pore size of ultra small pores according to claim 2, wherein: The side wall of the sealed box is provided with positive power supply towards positive ionization chamber, and the positive power supply is used to deliver positive charge into positive ionization chamber, and the side wall of the sealed box is provided with negative power supply towards negative ionization chamber, and the negative power supply is used to deliver negative charge into negative ionization chamber.

4. The test device for measuring the pore size of ultra small pores according to claim 2, wherein: The side wall of the sealed box is provided with positive detection hole in communication with positive ionization chamber, and the positive detection hole is used for positive electrode wire to pass through and extend into positive ionization chamber, and the other side wall of the sealed box is provided with negative detection hole in communication with negative ionization chamber, and the negative detection hole is used for negative electrode wire to pass through and extend into negative ionization chamber.

5. The test device for measuring the pore size of ultra small pores according to claim 1, wherein: The fixture includes clamping tube, the clamping tube passes through partition plate and is fixed on partition plate, the central axis of the clamping tube is perpendicular to the central axis of the partition plate, and the two ends of the clamping tube are located in positive ionization chamber and negative ionization chamber respectively, and the clamping tube has clamping channel for clamping and fixing measured object in.

6. The test device for measuring the pore size of ultra small pores according to claim 5, wherein: The end of the clamping tube towards positive ionization chamber is connected with fixing head, and the fixing head is located in positive ionization chamber, and the fixing head is provided with locking channel in communication with clamping channel, and the size of the fixing head is twice the size of the clamping tube.

7. The test device for measuring the pore size of ultra small pores according to claim 6, wherein: The fixing head and clamping tube have fixing ring, the fixing ring is sleeved on the end of clamping tube towards fixing head, and the fixing ring is wrapped around the periphery of the clamping channel.

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