A device for detecting the air permeability of an adjustable stainless steel sieve plate for a chromatographic column.

Abstract

This utility model relates to the technical field of air permeability testing devices, and discloses an air permeability testing device for an adjustable stainless steel sieve plate of a chromatographic column. The device includes a testing component comprising a main unit, a test cylinder, a platform, and a frame. An air tube connects the main unit and the test cylinder, with the test cylinder positioned above the platform and frame. An adjustable clamping component includes a slide cylinder, a lug, and an adapter ring. A chromatographic column sieve plate detection element is disposed within the slide cylinder cavity. By using the adjustable clamping component to hold the chromatographic column sieve plate detection element, and employing a PID algorithm to precisely adjust the air pump output, the device meets the high-precision air permeability testing requirements for the small pore size of the sieve plate. This design allows a single device to cover the testing of all sieve plate specifications without additional modification, significantly enhancing the applicability and testing flexibility of the equipment, and overcoming the limitation of traditional testing equipment that can only adapt to a single sieve plate specification.

Description

Technical Field

[0001] This utility model relates to the technical field of air permeability testing devices, and in particular to an air permeability testing device for an adjustable stainless steel sieve plate of a chromatographic column. Background Technology

[0002] Stainless steel sieve plates are one of the core components of chromatographic columns. They are used to fix packing material, uniformly distribute the mobile phase, and filter particles. Their permeability directly affects the separation efficiency and column pressure stability of the chromatographic column.

[0003] Traditional Gryllium permeability analyzers are mainly used for paper or film and cannot meet the requirements of small pore size and high precision of chromatographic column sieve plates. In addition, stainless steel sieve plates come in various specifications, and existing equipment lacks an adjustable structure, making it difficult to accommodate the clamping and sealing of sieve plates of different sizes. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an adjustable stainless steel sieve plate permeability detection device for chromatographic columns, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adjustable stainless steel sieve plate permeability testing device for a chromatographic column includes: a detection component comprising a main unit, a test cylinder, a base, and a frame, wherein a gas tube connects the main unit and the test cylinder, and the test cylinder is located above the base and frame; an adjustable clamping component disposed at the bottom end of the test cylinder, wherein a latch is provided between the adjustable clamping component and the test cylinder, and the adjustable clamping component includes a slide, a lug, and an adapter ring; and a chromatographic column sieve plate detection element disposed within the slide cavity, wherein the chromatographic column sieve plate detection element is movably engaged with a corresponding adapter ring.

[0007] According to the air permeability detection device for the adjustable chromatographic column stainless steel sieve plate, the slide cylinder is fixedly installed with hanging ears on both sides of its outer wall surface. The two sets of hanging ears are symmetrical. The slide cylinder is fixed to the test cylinder by the hanging ears and buckles.

[0008] According to the air permeability detection device for the adjustable chromatographic column stainless steel sieve plate, a sealing ring is provided between the top end of the slide cylinder and the bottom end of the test cylinder.

[0009] According to the adjustable chromatographic column stainless steel sieve plate permeability detection device, the adapter ring is installed at the bottom of the slide cylinder cavity, and the inner ring of the adapter ring has a locking groove, and the bottom of the chromatographic column sieve plate detection piece is locked in the corresponding locking groove.

[0010] According to the adjustable stainless steel sieve plate permeability detection device for chromatographic columns, an elastic sealing ring is engaged between the inner cavity of the sliding cylinder and the outer wall of the chromatographic column sieve plate detection element. The elastic sealing ring is made of silicone, is annular, and matches the thickness of the chromatographic column sieve plate detection element.

[0011] According to the adjustable chromatographic column stainless steel sieve plate permeability detection device, the adapter ring matches the outer diameter of the chromatographic column sieve plate detection element.

[0012] According to the air permeability detection device for the adjustable stainless steel sieve plate of the chromatographic column, the pressure difference across the slide cylinder needs to be adjustable to 6000 Pa.

[0013] This invention provides a device for detecting the air permeability of an adjustable stainless steel sieve plate in a chromatographic column. It offers the following advantages:

[0014] (1) Through the synergistic effect of the built-in single-chip microcontroller and PID algorithm, the output of the gas pump can be precisely adjusted to stabilize the pressure difference of the gas path system in the range of 4000~6000Pa, which is suitable for the detection requirements of high-density sieve plates. At the same time, the host can accurately measure the time for 100mL of gas to pass through the chromatographic column sieve plate detection element, effectively meeting the high-precision permeability detection requirements under the small pore size of the sieve plate, avoiding the deviation of detection data caused by unstable pressure difference or timing error, and significantly improving the accuracy and reliability of detection results.

[0015] (2) Through the modular design of the adjustable clamping components, the device can be compatible with different specifications of chromatographic column sieve plates. This design allows a single device to cover the detection of all specifications of sieve plates without additional modification, greatly enhancing the applicability and detection flexibility of the device. It solves the limitation that traditional detection equipment can only be adapted to a single specification of sieve plate. Enterprises do not need to purchase multiple special devices for the detection of sieve plates of different sizes. They can complete the detection of different specifications of sieve plates simply by changing the adapter ring and the elastic sealing ring, which significantly reduces the equipment purchase cost and the subsequent maintenance cost. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an adjustable stainless steel sieve plate for measuring the air permeability of a chromatographic column according to the present invention.

[0017] Figure 2 This is a schematic diagram of the installation position of the adjustable clamping component of the adjustable stainless steel sieve plate air permeability detection device for an adjustable chromatographic column according to the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the adjustable clamping component of an adjustable stainless steel sieve plate permeability detection device for an adjustable chromatographic column according to the present invention.

[0019] Figure 4This is a cross-sectional schematic diagram of the adjustable clamping component of an adjustable stainless steel sieve plate for measuring the permeability of an adjustable chromatographic column according to this utility model.

[0020] Legend:

[0021] 10. Main unit; 11. Test cylinder; 12. Base and frame; 13. Adjustable clamping assembly; 14. Snap-fit; 15. Slide cylinder; 16. Hanging lug; 17. Chromatographic column sieve plate detection element; 18. Sealing ring; 19. Elastic sealing ring; 20. Adapter ring. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figure 1-4 As shown, this utility model is a device for detecting the permeability of an adjustable stainless steel sieve plate in a chromatographic column. It includes a detection component comprising a main unit 10, a test cylinder 11, and a base and frame 12. The main unit 10 serves as the core control unit of the detection device, responsible for providing the gas source, controlling the airflow, and monitoring the system pressure. A microcontroller is installed within the main unit 10, which uses a PID algorithm to adjust the gas pump output, extending the pressure difference range to 4000–6000 Pa to accommodate high-density sieve plates. A gas tube connects the main unit 10 to the test cylinder 11, which is located above the base and frame 12. An adjustable clamping component 13 is located at the bottom of the test cylinder 11, and a latch 14 is provided between the adjustable clamping component 13 and the test cylinder 11. The adjustable clamping component 13 includes a slide cylinder 15, a lug 16, and an adapter ring 20. A chromatographic column sieve plate detection element 17 is located within the cavity of the slide cylinder 15, and the chromatographic column sieve plate detection element 17 is movably engaged with the corresponding adapter ring 20. During testing, the microcontroller uses a PID algorithm to adjust the constant pressure difference output of the gas pump to drive the gas through the chromatographic column sieve plate detector 17. The gas passage time of 100mL ensures that the device meets the requirements of the small pore size and high precision of the chromatographic column sieve plate detector 17. By setting an adjustable clamping component 13, it can be compatible with the clamping and sealing of chromatographic column sieve plate detectors 17 of different sizes, thus improving the practicality of the device.

[0024] It is worth noting that the main unit 10 is a DRK461A Gurley method air permeability tester, which is existing technology and will not be described in detail here.

[0025] like Figure 2-3As shown, two sets of hanging ears 16 are fixedly installed on both sides of the outer wall of the slide cylinder 15. The two sets of hanging ears 16 are symmetrical. The slide cylinder 15 is engaged and fixed with the test cylinder 11 through the hanging ears 16 and the buckle 14. By setting the hanging ears 16 symmetrically installed on the outer wall of the slide cylinder 15, and cooperating with the buckle 14 to achieve the engagement and fixation of the slide cylinder 15 and the test cylinder 11, the concentricity of the component assembly is ensured. A sealing ring 18 is set between the top end of the slide cylinder 15 and the bottom end of the test cylinder 11 to effectively prevent gas leakage, ensure the stability of the internal pressure of the gas circuit system, and ensure the accuracy of the test data.

[0026] like Figure 3-4 As shown, the adapter ring 20 is snapped into place at the bottom of the cavity of the slide cylinder 15. The adapter ring 20 comes in various sizes, including 1 / 8, 1 / 16, and 1 / 32 inches in inner diameter, to match the outer diameter of different column sieve plate detectors 17. The inner ring of the adapter ring 20 has a locking groove, and the bottom of the column sieve plate detector 17 engages within the corresponding groove. An elastic sealing ring 19 is engaged between the cavity of the slide cylinder 15 and the outer wall of the column sieve plate detector 17. The elastic sealing ring 19 is made of silicone and is annular. The elastic sealing ring 19 matches the thickness of the column sieve plate detector 17, and the adapter ring 20 matches the outer diameter of the column sieve plate detector 17. The pressure difference across the slide cylinder 15 needs to be adjustable to 6000 Pa. By setting up more than 20 sizes of adapter rings to adapt to different chromatographic column sieve plate detection elements 17, the applicability and testing flexibility of the equipment are enhanced. An elastic sealing ring 19 is set between the slide cylinder 15 and the chromatographic column sieve plate detection element 17. The elastic sealing ring 19 matches the thickness of the chromatographic column sieve plate detection element 17, providing good radial sealing and elastic buffering. A single device can cover the full specifications of chromatographic column sieve plate detection elements 17 for testing, reducing the procurement cost for enterprises.

[0027] The operating principle of this utility model for a device to detect the air permeability of an adjustable stainless steel sieve plate for a chromatographic column is as follows:

[0028] First, based on the outer diameter specification of the column sieve plate detection component 17, select the corresponding inner diameter adapter ring 20, and snap the adapter ring 20 into the bottom end of the cavity of the slide cylinder 15. Then, snap the bottom end of the column sieve plate detection component 17 into the snap groove of the adapter ring 20. Snap the elastic sealing ring 19 between the slide cylinder 15 and the column sieve plate detection component 17 to ensure that the thickness of the elastic sealing ring 19 matches that of the column sieve plate detection component 17, thereby achieving radial sealing and elastic buffering. Through the lugs 16 on both sides of the outer wall of the slide cylinder 15, the slide cylinder 15 and the test cylinder 11 are snapped together and fixed by the buckles 14. At this time, the sealing ring 18 between the slide cylinder 15 and the test cylinder 11 will form a sealing structure to prevent subsequent gas leakage, thus completing the assembly of the adjustable clamping assembly 13 and the test cylinder 11.

[0029] Next, the host 10 is turned on. The microcontroller controller inside the host 10 adjusts the output of the gas pump through the PID algorithm to stabilize the pressure difference of the gas path system within the range of 4000-6000Pa that is compatible with the high-density sieve plate. The host 10 delivers gas with a constant pressure difference to the test cylinder 11 through the gas tube. The gas passes through the test cylinder 11 and the slide cylinder 15 in sequence, and finally passes through the chromatographic column sieve plate detection element 17. During this process, the host 10 monitors the gas path status in real time and accurately measures the time it takes for 100mL of gas to pass through the chromatographic column sieve plate detection element 17, thereby meeting the requirements of the small pore size of the sieve plate and high-precision detection.

[0030] Finally, after a single test, if it is necessary to test different sizes of chromatographic column sieve plate test pieces 17, the mating structure of the buckle 14 and the hanging lug 16 can be disassembled, the slide cylinder 15 can be removed, and the corresponding size adapter ring 20 and elastic sealing ring 19 can be replaced. The above assembly and testing steps can then be repeated. Through the flexible adaptability of the adjustable clamping assembly 13, a single device can cover the permeability testing of all sizes of chromatographic column sieve plate test pieces 17, ensuring stable gas path pressure and accurate data in each test, while effectively reducing the cost for companies to purchase additional equipment for testing different sizes of sieve plates.

[0031] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A device for detecting the air permeability of an adjustable chromatographic column stainless steel frit, characterized in that, include: The detection component includes a host (10), a test cylinder (11), and a platform and frame (12). An air tube is connected between the host (10) and the test cylinder (11), and the test cylinder (11) is located above the platform and frame (12). An adjustable clamping assembly (13) is provided at the bottom of the test cylinder (11). A buckle (14) is provided between the adjustable clamping assembly (13) and the test cylinder (11). The adjustable clamping assembly (13) includes a slide cylinder (15), a hanging ear (16), and an adapter ring (20). The chromatographic column sieve plate detection element (17) is disposed in the cavity of the slide cylinder (15) and is movably engaged with the corresponding adapter ring (20).

2. The device for detecting the air permeability of an adjustable chromatographic column stainless steel frit according to claim 1, characterized in that: The slide tube (15) has two sets of hanging ears (16) fixedly installed on both sides of its outer wall. The two sets of hanging ears (16) are symmetrical. The slide tube (15) is engaged and fixed with the test cylinder (11) through the hanging ears (16) and the buckle (14).

3. The air permeability detection device for the adjustable stainless steel sieve plate of the chromatographic column according to claim 1, characterized in that: A sealing ring (18) is provided between the top end of the slide cylinder (15) and the bottom end of the test cylinder (11).

4. The device for detecting the air permeability of an adjustable chromatographic column stainless steel frit according to claim 1, characterized in that: The adapter ring (20) is engaged and installed at the bottom of the cavity of the slide cylinder (15). The inner ring of the adapter ring (20) has an engagement groove, and the bottom of the chromatographic column sieve plate detection piece (17) is engaged in the corresponding engagement groove.

5. The device for detecting the air permeability of an adjustable chromatographic column stainless steel frit according to claim 1, characterized in that: An elastic sealing ring (19) is engaged between the cavity of the slide cylinder (15) and the outer wall of the chromatographic column sieve plate detection element (17). The elastic sealing ring (19) is made of silicone and is annular. The elastic sealing ring (19) matches the thickness of the chromatographic column sieve plate detection element (17).

6. The device for detecting the air permeability of an adjustable chromatographic column stainless steel frit according to claim 4, characterized in that: The adapter ring (20) matches the outer diameter of the chromatographic column sieve plate detection element (17).

7. The device for detecting the air permeability of an adjustable chromatographic column stainless steel frit according to claim 1, characterized in that: The pressure difference between the two sides of the slide (15) needs to be adjustable to 6000 Pa.

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