Multifunctional sample cell module for pore diameter analysis and detection by capillary flow method

Abstract

The utility model provides a multifunctional sample cell module for pore diameter analysis and detection by a capillary flow method, which mainly comprises a basic base, a top cover and a sealing element, the top cover and the base are in threaded connection to form a sample cavity in the middle, the sealing element is arranged in the sample cavity, and a groove and a positioning bump are arranged between the base and the sealing element. Common sheet-shaped or block-shaped samples and the like can be detected; besides, a lengthening cylinder is additionally arranged, and the two ends of the lengthening cylinder can be lengthened and connected to the base and the top cover to increase the height of the test cavity, so that a thicker or higher sample can be detected; a downstream sensing cylinder seat which is movably assembled is utilized, so that the sample can be detected under the conditions of negative pressure and micro differential pressure; due to the integral effective design, when the device is applied, the device has the practical characteristics of accurate positioning, adjustable size and multifunctional assembly replacement, and various analysis and detection can be carried out more conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sample clamp in detection equipment, especially to a multifunctional sample tank module for capillary flow method pore size analysis detection. BACKGROUND

[0002] With the development of society, the demand for porous filter materials gradually increases, and the porous filter materials are widely used in biotechnology, family, medical care, filtration, papermaking and energy and many other industries. However, because the tubular filter material product has a porous microporous structure, the tubular filter material product is affected by compression stress when being applied. Therefore, it is of great significance to measure the pore volume, pore size and pore size distribution of the filter material under the action of high pressure stress.

[0003] A capillary flow porometer (also known as Capillary Flow Porometer) is an instrument specially used for measuring the pore size of filter materials. It is mainly applied to liquid or gas filtration to evaluate the filtration efficiency of the filter material. The working principle of the instrument is based on the capillary phenomenon. It uses a circular cross section / cylindrical small hole (or capillary tube) to simulate the pore of the filter material. When the liquid or gas passes through the hole, the pressure difference and flow rate can be measured, so that the pore size and pore size distribution can be calculated according to the Washburn calculation formula through the relationship between the pressure and the flow rate.

[0004] The capillary flow porometer can be used to measure the through-hole pore size and its distribution of porous materials. In addition to being used to detect various filter materials, the instrument can also be used to detect porous membranes, paper, films, hollow fibers, porous ceramics, sintered metals and the like. Generally, a test experiment of filter materials needs to test the pressure difference, filtration efficiency, fluid flow and other indicators of the material at the same time in a test cycle.

[0005] However, the early conventional sample clamp (also known as sealing block) does not have a good positioning design between the base, so that when the sample clamp cover is locked with the base, the built-in sample clamp is easily rotated with the slot cover, which causes the built-in sample to be twisted and damaged, affecting the test results. In the more advanced design, the sample clamp and the base are provided with positioning, but the main structure is that a plurality of protruding columns are arranged on the inner bottom surface of the base, and a corresponding number of positioning holes are arranged on the sample clamp. The two are connected and fixed, but the structure design has defects. Sometimes, the sample clamp is placed at an improper angle, which deforms the protruding columns, causing mutual jamming and making it difficult to take out the sample clamp.

[0006] Furthermore, the sample holders in existing technologies have fixed, single-component covers and bases, lacking multi-component interchangeability and thus only suitable for single-test applications. They cannot be combined in various ways to adapt to different sample conditions. Moreover, the height of the cover and base assembly in existing technologies is also fixed, severely limiting the thickness of measurable samples. Longer or thicker samples must be cut before testing, but cutting destroys their integrity, making them unrecyclable and wasteful, thus failing to meet economic and environmental requirements. In conclusion, the overall design of existing sample holders is inadequate and requires further improvement. Utility Model Content

[0007] In view of this, one of the objectives of this utility model is to provide a multifunctional sample cell module for capillary flow pore size analysis and detection, mainly comprising:

[0008] A base, wherein the base has a discharge hole at the bottom and an external thread at the top interface of the base;

[0009] A top cover, the top of which has an injection hole, and the bottom interface of which has an internal thread for connection with the base, forming a sample chamber in the middle.

[0010] A sealing element for clamping a sample and sample holder, the sealing element being cylindrical, the sealing element (or sample holder pair) being placed inside the base, the sealing element being placed on the sample (or sample holder pair), and having a central through hole, the upper and lower ends of the central through hole being aligned and communicating with the injection hole and the discharge hole.

[0011] The inner sidewall of the base has at least one groove in the axial direction, and the outer sidewall of the seal has a positioning protrusion opposite to the groove, so that the seal can be easily aligned and placed into the base to be fixed without rotating or shifting, and will not cause damage to the sample during testing.

[0012] In some implementations, an extension tube is further provided, with internal and external threads at both ends of the extension tube, so that one end of the extension tube is extended and connected to the base to increase the height of the test chamber, and the other end of the extension tube is connected and covered by a top cover.

[0013] In some embodiments, the discharge port of the base is further assembled with a test tube, the inlet end of which is provided with an internal thread, the outlet end of which is provided with an internal thread, and a connecting hole is provided in the middle of the tube side of the test tube to communicate with the inner channel of the test tube.

[0014] In some embodiments, a downstream sensing cylinder base is further provided, an injection hole is arranged above the downstream sensing cylinder base, an inner thread is arranged on the lower interface of the downstream sensing cylinder base, a sealing cover and a sealing gasket for reinforcing locking are arranged on the upper interface, and a plurality of lock holes are arranged on the upper interface frame in intervals, the upper surface of the sealing cover is arranged with a plurality of screw holes corresponding to the lock holes, and a plurality of bolts are locked to tightly lock the sealing cover and the upper interface.

[0015] Compared with the prior art, the multifunctional sample groove module has the advantages of accurate positioning, size adjustment and multifunctional component replacement, can overcome the shortcomings of the sample clamp in the prior art, meet the experimental requirements in different application scenarios, make various analysis and detection more convenient, realize accurate measurement and evaluation of the pore structure of the porous material, and ensure the accuracy and reliability of the test results. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective exploded view of one embodiment of the multifunctional sample groove module for capillary flow porometry analysis and detection of the utility model;

[0017] Figure 2 It is a combined section view of one embodiment of the multifunctional sample groove module for capillary flow porometry analysis and detection of the utility model;

[0018] Figure 3 It is a perspective exploded view of the multifunctional sample groove module for capillary flow porometry analysis and detection of the utility model provided with an extension cylinder;

[0019] Figure 4 It is a combined section view of the multifunctional sample groove module for capillary flow porometry analysis and detection of the utility model provided with an extension cylinder;

[0020] Figure 5 It is a perspective exploded view of the multifunctional sample groove module for capillary flow porometry analysis and detection of the utility model provided with a downstream sensing cylinder base;

[0021] Figure 6 It is a combined section view of the multifunctional sample groove module for capillary flow porometry analysis and detection of the utility model provided with a downstream sensing cylinder base;

[0022] Figure 7 It is an application example diagram of the multifunctional sample groove module for capillary flow porometry analysis and detection of the utility model;

[0023] Figure 8 It is a flowchart of the application method of the multifunctional sample groove module for capillary flow porometry analysis and detection of the utility model;

[0024] Reference Signs List:

[0025] 100 - multifunctional sample tank module, 1 - base, 10 - discharge hole, 11 - interface, 15 - groove, 16 - short tube, 2 - top cover, 20 - injection hole, 21 - interface, 250 - sample cavity, 3 - sealing element, 30 - central through hole, 35 - positioning protrusion, 4 - lengthening cylinder, 41 - interface, 42 - interface, 5 - test tube, 51 - inlet end, 52 - outlet end, 53 - interface hole, 6 - downstream sensing cylinder seat, 60 - injection hole, 61 - interface, 611 - locking hole, 62 - interface, 61 - sealing gasket, 65 - sealing cover, 651 - screw hole, 66 - bolt, 70 - sample, 200 - capillary flow porometry, 201 - pressure regulating valve, 202 - flow meter, 203 - pressure sensor, 204 - computer control system, 205 - software. DETAILED DESCRIPTION

[0026] In order to facilitate understanding of the content of the utility model and the effects that can be achieved, specific embodiments are listed with the drawings, and are described in detail as follows: as a non-limiting embodiment, as shown in the drawings, the utility model provides a multifunctional sample tank module 100 for capillary flow porometry detection, which mainly comprises: Figures 1-2 A base 1 is provided below the base 1, and a discharge hole 10 is arranged on the upper interface 11 of the base 1, and the upper interface 11 of the base 1 is provided with external threads;

[0027] A top cover 2 is provided, and an injection hole 20 is arranged on the upper part of the top cover 2, and the lower interface 21 of the top cover 2 is provided with internal threads, so that when the top cover 2 is connected with the base 1, a sample cavity 250 is formed in the middle;

[0028] A sealing element 3 is provided, which is in the shape of a cylinder and is placed in the base 1, and the sealing element 3 is provided with a central through hole 30, and the upper and lower ends of the central through hole 30 are respectively aligned with the injection hole 20 and the discharge hole 10 and are in communication;

[0029] Among them, the inner side wall of the base 1 is axially provided with at least one groove 15, and the outer side wall of the sealing element 3 is provided with a positioning protrusion 35 opposite to the groove 15, so that the sealing element 3 is conveniently aligned and placed in the base 1 to be fixed and not to be rotated and displaced, and the sample will not be damaged during testing.

[0030] As another non-limiting embodiment, as shown in the drawings, the utility model is further provided with a lengthening cylinder 4, and the two end interfaces 41 and 42 of the lengthening cylinder 4 are respectively provided with internal threads and external threads, one end is connected to the base 1 to increase the height of the test cavity, and the other end is connected to the top cover 2 for covering.

[0031] Figures 3-4 As another non-limiting embodiment, as shown in the drawings, the utility model is further provided with a lengthening cylinder 4, and the two end interfaces 41 and 42 of the lengthening cylinder 4 are respectively provided with internal threads and external threads, one end is connected to the base 1 to increase the height of the test cavity, and the other end is connected to the top cover 2 for covering.

[0032] As another non-limiting embodiment, as shown in the drawings,​Figures 5-6 As shown in the drawings, the outlet hole 10 of the base 1 is further provided with a short pipe 16, which is externally threaded to further movably assemble a test pipe 5, the inlet end 51 of the test pipe 5 is internally threaded, the outlet end 52 is internally threaded, and the middle of the pipe is provided with a through hole 53 to communicate with the inner channel of the test pipe 5.

[0033] As a further non-limiting embodiment, the utility model further comprises a downstream sensing cylinder base 6, the upper end of the downstream sensing cylinder base 6 is provided with an injection hole 60, the lower end 62 of the downstream sensing cylinder base 6 is internally threaded, the upper end 61 is provided with a sealing cover 65 for locking and a sealing gasket 64, and a plurality of locking holes 611 are arranged on the radial frame of the upper end 61, a plurality of screw holes 651 corresponding to the locking holes 611 are arranged on the upper surface of the sealing cover 65, and a plurality of bolts 66 are locked to tightly lock and cover the two.

[0034] Therefore, as shown in Figure 1 and Figure 7 the drawings, the utility model can be multifunctionally combined and replaced to be suitable for detecting any sample 70 with different thicknesses and lengths, keep the sample 70 intact, do not need to be cut and damaged to cause waste, and can be used for negative pressure test in addition to positive pressure test.

[0035] More specifically, as shown in Figures 1-8 the drawings, the application method of the multifunctional sample groove module 100 for capillary flow porometry analysis and detection of the utility model mainly includes:

[0036] First, a multifunctional sample groove module 100 for capillary flow porometry analysis and detection is constructed, which is provided with a base 1, the tubular outlet hole 10 under the base 1 is externally threaded, and the upper end interface 11 is externally threaded; a top cover 2, which is provided with an injection hole 20 on the upper end, and the lower end interface 21 is internally threaded, and the sample cavity 250 is formed in the middle of the interface with the base 1; and a sealing element 3, which is cylindrically arranged in the base 1, is provided with a central through hole 30 on the upper end, and the upper and lower ends of the central through hole 30 are aligned and communicated with the injection hole 20 and the outlet hole 10 respectively; the inner side wall of the base 1 is axially provided with at least one groove 15, and the outer side wall of the sealing element 3 is provided with opposite positioning protrusions 35, so that the sealing element 3 is conveniently aligned and arranged in the base 1 to be fixed and not to be rotated and displaced, and the sample is not damaged during testing;

[0037] a lengthened cylinder 4, which is provided with internally threaded and externally threaded interfaces 41 and 42 at both ends, and the one end interface 41 is lengthened to connect the base 1 to increase the height of the test cavity, and the other end interface 42 is used for connecting the top cover 2 to cover;

[0038] a test pipe 5, the inlet end 51 of which is provided with internal threads for being assembled on the discharge hole 10 of the base 1, the outlet end 52 of which is provided with internal threads, and the pipe side of the test pipe 5 is provided with a hole 53 communicating with the internal channel;

[0039] a downstream sensing cylinder base 6, the upper end of which is provided with an injection hole 60, the lower end of which is provided with internal threads, and the upper end of which is provided with a sealing cover 65 for reinforcing locking and a sealing gasket 64, and a plurality of locking holes 611 are radially spaced apart on the upper end 61, a plurality of screw holes 651 corresponding to the locking holes 511 are spaced apart on the upper surface of the sealing cover 65, and a plurality of bolts 66 are locked, so that they can be tightly locked and closed.

[0040] As shown in Figure 7 and Figure 8 The multifunctional sample tank module 100 provided by the capillary flow method pore size analysis and detection can perform multifunctional replacement, and the application method is as follows:

[0041] S101. Basic test application, equipped with base 1, top cover 2, matched with sealing element 3, can be used for capillary flow method pore size analysis and detection of general sheet or block samples 70;

[0042] S102. Long test application, equipped with base 1, top cover 2, sealing element 3, matched with long cylinder 4, can be used for capillary flow method pore size analysis and detection of general thicker or higher samples 70; and

[0043] S103. Negative pressure test application, equipped with base 1, sealing element 3, test pipe 5, matched with downstream sensing cylinder base 6, can be used for capillary flow method pore size analysis and detection of general samples 70 under negative pressure and differential pressure conditions;

[0044] In some embodiments, as shown in Figure 7 The multifunctional sample tank module 100 of the utility model is mainly applied to the capillary flow method pore size analyzer 200, which further comprises:

[0045] A pressure regulating valve 201 for controlling the gas pressure to slowly increase;

[0046] A flow meter 202 for measuring the gas flow;

[0047] A pressure sensor 203 for measuring the pressure;

[0048] A computer control system 204 for controlling the speed of the pressure regulating valve 201, and continuously measuring the pressure and the gas flow, and

[0049] A software 205 for setting various analysis parameters and performing data analysis.

[0050] In use, first need to be placed in the groove of the seal 3 ring seal (or film gasket), and then put the sample 70, and in the sample 70 above again placed in another ring seal. So that the sample and the upper cover and base 1 can form a hermetic seal during testing, to prevent gas leakage during testing. Or in the seal 3 to increase the weight or piston to apply three axial compression (the above figure is not shown), to measure the maximum pore size, average pore size, and pore size distribution of the sample.

[0051] During testing, and with the wet curve and dry curve, as the capillary flow method pore size analyzer 200 used to evaluate the two key basis for filter material pore size, where the wet curve is the gas will be drawn out of the filter material liquid between the pressure and flow curve, wet curve measurement purposes are used to determine the filter material in the hole channel narrowest location of the pore size. Dry curve is drawn in the filter material by the gas (usually nitrogen) between the pressure and flow curve, dry curve measurement purposes are used to calculate the average flow pore size, the minimum pore size and gas permeability.

[0052] Compared with the prior art, the utility model and its application method have the advantages that: the overall effective design of the utility model makes the multifunctional sample groove module 100 have the practical features of accurate positioning, size adjustment and multifunctional component replacement when in use, can overcome the shortcomings of traditional sample clamps, can meet the experimental requirements in different application scenarios through multifunctional combined replacement technology, can make various analysis and detection more convenient, can perform porosity testing under the controlled compression stress applied to the sample 70 material in various combinations of single-axis, double-axis, radial or three-axis compression, can realize accurate measurement and evaluation of the pore structure of the porous material, and can ensure the accuracy and reliability of the test results.

[0053] In summary, the utility model completely meets the patent requirements. The above description is only a preferred embodiment of the utility model, which cannot limit the scope of the utility model; therefore, any equivalent changes and modifications made according to the patent application scope and the utility model specification content shall be within the scope of the utility model patent.

Claims

1. A multifunctional sample cell module for capillary flow porometry detection, mainly comprising: a base, the base is provided with an outlet hole at the bottom, the upper interface of the base is provided with external threads; a top cover, the top cover is provided with an injection hole at the top, the lower interface of the top cover is provided with internal threads to connect with the base and form a sample cavity in the middle, and a sealing element, the sealing element is cylindrical and placed in the base, the sealing element is provided with a central through hole, the upper and lower ends of the central through hole are aligned and communicated with the injection hole and the outlet hole, characterized in that: the inner side wall of the base is provided with at least one groove in the axial direction, the outer side wall of the sealing element is provided with a positioning protrusion opposite to the groove, so that the sealing element can be conveniently aligned and placed in the base to be fixed without rotating and shifting, and the sample will not be damaged during testing.

2. The multifunctional sample cell module for capillary flow porometry detection according to claim 1, characterized in that: It is further provided with an extension cylinder, the two ends of the extension cylinder are respectively provided with internal threads and external threads, one end is connected with the base to increase the height of the test cavity, and the other end is used for connecting the top cover to cover.

3. The multifunctional sample cell module for capillary flow porometry detection according to claim 1, wherein: The outlet hole of the base is further provided with a short tube, the short tube is provided with external threads to further assemble a test tube, the inlet end of the test tube is provided with internal threads, the outlet end of the test tube is provided with an internal thread, and the test tube is provided with a through hole in the middle of the tube side which is communicated with the inner channel of the test tube.

4. The multifunctional sample cell module for capillary flow porometry detection according to claim 1, wherein: It is further provided with a downstream sensing cylinder seat, the upstream of the downstream sensing cylinder seat is provided with an injection hole, the lower interface of the downstream sensing cylinder seat is provided with internal threads, the upper interface of the downstream sensing cylinder seat is provided with a sealing cover and a sealing gasket for strengthening the locking, and a plurality of lock holes are arranged on the upper interface frame, the upper surface of the sealing cover is provided with a plurality of screw holes corresponding to the lock holes, and a plurality of bolts are used for locking the sealing cover and the upper interface tightly.

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