A device for testing anisotropic conductivity of fluid

Abstract

A device for testing the anisotropic conductivity of a fluid relates to the field of experimental detection technology, and solves the problem of how to provide a device for testing the anisotropic conductivity of a fluid, comprising a pressure chamber, a flow chamber, a lateral electrode sheet group, a longitudinal electrode sheet group, and a valve; one end of the flow chamber is sealed and connected to the pressure chamber, and a valve is installed at the end of the other end; the lateral electrode sheet group includes two electrode sheets arranged opposite to each other and tightly attached to the inner wall of the flow chamber, and the electrode sheet and the inner wall of the flow chamber are insulated; the longitudinal electrode sheet group includes two electrode sheets arranged opposite to each other, perpendicular to the central axis of the flow chamber, and can be pulled out or pushed into the flow chamber; the lateral electrode sheet group is used to test the lateral conductivity of the fluid; and the longitudinal electrode sheet group is used to test the conductivity of the fluid in the flow direction. The device has a simple structure and is easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of experimental detection, and in particular to a device for testing the anisotropic conductivity of a fluid. Background Art

[0002] Anisotropy refers to the fact that all or part of a substance's chemical, physical and other properties change with the change of direction, showing different properties in different directions. Anisotropy is a common property in materials and media. For example, liquid crystals and fibers have anisotropic electrical and optical properties. Testing and evaluating the electrical, optical and other properties of anisotropic materials and media in different directions is a common problem in modern scientific experiments, and is also a very important way to understand the physical properties of materials and media and develop new sensor devices.

[0003] In the prior art, the Chinese utility model patent "Thermal resistance testing device for anisotropic thermally conductive sheet" with authorization announcement number CN 208818771 U discloses a thermal resistance testing device for anisotropic thermally conductive sheet, which is provided with an upper support seat and a lower support seat, a test platform is provided between the upper support seat and the lower support seat, a heating component is provided at one end of the lower end surface of the upper support seat, and an upper support portion is provided at the other end, a cooling component is provided on the upper end surface of the lower support seat and at a position opposite to the heating component, and a lower support portion is provided at a position opposite to the upper support portion, and a plurality of collection devices for collecting the thickness and temperature of the anisotropic thermally conductive sheet to be tested are distributed in the test platform, and the collection devices are connected to the control unit.

[0004] Although the above utility model patent collects the thickness data of the anisotropic thermal conductive sheet to be tested and the transverse and longitudinal temperature data through the collection device, and calculates the thermal resistance and thermal conductivity of the anisotropic thermal conductive sheet according to the thickness data, transverse and longitudinal temperature and power data through the control unit. In addition, by setting a pressure device, it can meet the testing needs of different customers for different pressures, and has a wide range of uses. However, the above invention patent is used for thermal resistance testing of anisotropic thermal conductive sheets, and cannot be used to test the anisotropic conductivity of fluids. And there is currently no mature device on the market that can test the conductivity of anisotropic fluids. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a device for testing the anisotropic conductivity of a fluid, since there is no mature device on the market that can test the conductivity of anisotropic fluids.

[0006] The present invention solves the above technical problems through the following technical solutions.

[0007] A device for testing the anisotropic conductivity of a fluid, characterized in that it comprises a pressure chamber (1), a flow chamber (2), a lateral electrode sheet group (3), a longitudinal electrode sheet group (4), and a valve (5); the pressure chamber (1) comprises a piston (11), a piston support rod (12), and a main chamber (13); the piston (11) is connected to the piston support rod (12), and the edges of the end surface of the piston (11) are tightly fitted to the inner surface of the main chamber 13; the main chamber (13) is open at the top, sealed at the bottom, and has a side opening; one end of the flow chamber (2) is tightly sealed with the side opening. The lateral electrode sheet group (3) comprises two electrode sheets arranged opposite to each other and tightly attached to the inner wall of the flow cavity (2), and the electrode sheets and the inner wall of the flow cavity (2) are insulated at their joints; the longitudinal electrode sheet group (4) comprises two electrode sheets arranged opposite to each other, perpendicular to the central axis of the flow cavity (2), and capable of being pulled out or pushed into the flow cavity (2); the lateral electrode sheet group (3) is used to test the lateral conductivity of the fluid; and the longitudinal electrode sheet group (4) is used to test the conductivity of the fluid in the flow direction.

[0008] Currently, there is no mature device on the market that can test the conductivity of anisotropic fluids. The present invention provides a simple and rapid test device for measuring the conductivity of all anisotropic materials with fluidity, such as liquid crystals, fiber solutions, conductive polymer solutions, etc.; a pressure cavity is used to squeeze the fluid in the cavity to quickly pass through a narrow and long pipe so that the fluid can achieve macroscopic orientation, and the electrode sheets pre-arranged on the inner wall of the cavity are used to connect the test instrument, thereby realizing in-situ testing of the lateral conductivity of the fluid and the flow direction of the fluid. The device has a simple structure and is easy to operate.

[0009] As a further improvement of the technical solution of the present invention, the pressure chamber (1) further includes a connecting tube (14); the main chamber (13) is open at the top and has a hole at the bottom; one end of the connecting tube (14) is tightly connected to the bottom hole, and the other end is tightly connected to one end of the flow chamber (2).

[0010] As a further improvement of the technical solution of the present invention, the connecting pipe (14) and the main cavity (13) are integrally formed, or the connecting pipe (14) and the main cavity (13) are connected by welding, bonding or threaded connection.

[0011] As a further improvement of the technical solution of the present invention, the piston (11) and the piston support rod (12) are connected by threading or welding.

[0012] As a further improvement of the technical solution of the present invention, the piston (11) and the piston support rod (12) are integrally formed.

[0013] As a further improvement of the technical solution of the present invention, the up and down movement of the piston support rod (12) is achieved manually or automatically by a motor.

[0014] As a further improvement of the technical solution of the present invention, the conductivity test instrument is a conductivity tester or an electrochemical workstation.

[0015] As a further improvement of the technical solution of the present invention, the valve (5) is connected to the flow chamber (2) by welding or threading.

[0016] As a further improvement of the technical solution of the present invention, the flow cavity (2) is a pipe with a length-to-diameter ratio greater than 5:1.

[0017] As a further improvement of the technical solution of the present invention, the flow cavity (2) is a square or circular pipe.

[0018] The advantages of the present invention are:

[0019] (1) Currently, there is no mature device on the market that can test the conductivity of anisotropic fluids. The present invention provides a simple and rapid test device for measuring the conductivity of all anisotropic materials with fluidity, such as liquid crystals, fiber solutions, conductive polymer solutions, etc.; the fluid in the cavity is squeezed by a pressure cavity to quickly pass through a narrow and long pipe so that the fluid can achieve macroscopic orientation, and the electrode sheets pre-arranged on the inner wall of the cavity are connected to the test instrument, thereby realizing in-situ testing of the lateral conductivity of the fluid and the flow direction of the fluid. The device has a simple structure and is easy to operate.

[0020] (2) The device has a simple structure and is easy to operate. It has a reserved wire access terminal and can be used with different models of electrochemical workstations for testing.

[0021] (3) The device can control the degree of flow orientation by controlling the extrusion speed or pressure of the piston, thereby realizing the test and evaluation of the anisotropic electrical properties of fluids with different orientation degrees.

[0022] (4) The flow chamber is a square chamber, which is conducive to the arrangement of the electrode sheets and simplifies the calculation of conductivity.

[0023] (5) The flow cavity is a pipe with a length-to-diameter ratio greater than 5:1. The pipe with a length-to-diameter ratio greater than 5:1 ensures a high degree of orientation of the fluid flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a side view of a fluid anisotropic conductivity testing device according to Embodiment 1 of the present invention;

[0025] Figure 2 is a top view of a fluid anisotropic conductivity testing device according to Embodiment 1 of the present invention;

[0026] Figure 3 It is a side view of a fluid anisotropic conductivity testing device according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] like Figure 1 and Figure 2 As shown, a device for testing the anisotropic conductivity of a fluid comprises a pressure chamber 1, a flow chamber 2, a lateral electrode sheet group 3, a longitudinal electrode sheet group 4, and a valve 5; the pressure chamber 1 comprises a piston 11, a piston support rod 12, and a main chamber 13; the piston 11 and the piston support rod 12 are connected by threads or welding, or the piston 11 and the piston support rod 12 are integrally formed.

[0030] The flow chamber 2 is a pipe with a length-to-diameter ratio greater than 5:1. Preferably, the flow chamber 2 is a square pipe, or a circular pipe. The square pipe is conducive to the arrangement of the electrode sheets and simplifies the calculation of the conductivity. Preferably, a pipe with a length-to-diameter ratio greater than 10:1 is used to ensure a high degree of orientation of the fluid flow.

[0031] The peripheral edges of the end surface of the piston 11 are closely fitted to the inner surface of the main cavity 13 to ensure the air tightness of the main cavity 13 .

[0032] The main cavity 13 is open at the top, sealed at the bottom, and has a hole on the side. One end of the flow cavity 2 is tightly connected to the side hole by welding or threading, and a valve 5 is installed at the end of the other end of the flow cavity 2.

[0033] When the valve 5 is closed, the end surface of the piston 11, the main cavity 13, the flow cavity 2 and the valve 5 form a tightly closed space.

[0034] The lateral electrode sheet group 3 includes two electrode sheets arranged opposite to each other and tightly attached to the inner wall of the flow cavity 2, and the electrode sheets are insulated at the joints with the inner wall of the flow cavity 2; the longitudinal electrode sheet group 4 includes two electrode sheets arranged opposite to each other, perpendicular to the central axis of the flow cavity 2, and can be pulled out or pushed into the flow cavity 2; the lateral electrode sheet group 3 is used to test the lateral conductivity of the fluid; the longitudinal electrode sheet group 4 is used to test the conductivity in the flow direction of the fluid.

[0035] The fluid to be tested is loaded into the main cavity 13, and the longitudinal electrode sheet group 4 is pulled out from the flow cavity 2. At this time, the valve 5 is opened, and the piston support rod 12 moves up and down to drive the piston to move up and down, thereby squeezing the fluid to be tested inside the main cavity 13 to flow into the flow cavity 2. At this time, the electrical signals on the two electrode sheets of the lateral electrode sheet group 3 are sent to the test instrument to complete the test of the lateral conductivity of the fluid; then the longitudinal electrode sheet group 4 is pushed into the flow cavity 2. At this time, the electrical signals on the two electrode sheets of the longitudinal electrode sheet group 4 are sent to the test instrument to complete the test of the conductivity in the flow direction of the fluid.

[0036] The up and down movement of the piston support rod 12 is achieved manually or automatically by a motor.

[0037] The test instrument is a conductivity tester or an electrochemical workstation.

[0038] The valve 5 is installed by welding or thread welding.

[0039] Embodiment 2

[0040] like Figure 3 As shown, what is different from the first embodiment is that: the pressure chamber 1 also includes a connecting tube 14, the main chamber 13 is open at the top and has a hole at the bottom; one end of the connecting tube 14 is tightly connected to the bottom hole by welding or threading, and the other end is tightly connected to one end of the flow chamber 2 by welding or threading; the bottom hole is used to facilitate the flow of the fluid to be tested in the main chamber 13 into the flow chamber 2, which is convenient for testing.

[0041] Preferably, the connecting pipe 14 and the main cavity 13 are integrally formed, which is beneficial to ensure the airtightness of the device.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for testing the anisotropic conductivity of a fluid, characterized in that: The invention comprises a pressure chamber (1), a flow chamber (2), a lateral electrode sheet group (3), a longitudinal electrode sheet group (4), and a valve (5); the pressure chamber (1) comprises a piston (11), a piston support rod (12), and a main chamber (13); the piston (11) is connected to the piston support rod (12), and the edges of the end surface of the piston (11) are tightly fitted to the inner surface of the main chamber 13; the main chamber (13) has an opening at the top, a sealed bottom, and a side opening; one end of the flow chamber (2) is tightly connected to the side opening, and the other end is provided with a valve. The valve (5) is installed; the lateral electrode sheet group (3) comprises two electrode sheets arranged opposite to each other and tightly attached to the inner wall of the flow cavity (2), and the electrode sheets and the inner wall of the flow cavity (2) are insulated at the joint; the longitudinal electrode sheet group (4) comprises two electrode sheets arranged opposite to each other, perpendicular to the central axis of the flow cavity (2), and can be pulled out or pushed into the flow cavity (2); the lateral electrode sheet group (3) is used to test the lateral conductivity of the fluid; and the longitudinal electrode sheet group (4) is used to test the conductivity of the fluid in the flow direction.

2. A device for testing anisotropic conductivity of fluid according to claim 1, characterized in that: The pressure chamber (1) further comprises a connecting tube (14); the main chamber (13) is open at the top and has a hole at the bottom; one end of the connecting tube (14) is tightly connected to the hole at the bottom, and the other end is tightly connected to one end of the flow chamber (2).

3. A device for testing anisotropic conductivity of fluid according to claim 2, characterized in that: The connecting pipe (14) and the main cavity (13) are integrally formed, or the connecting pipe (14) and the main cavity (13) are connected by welding, bonding or threaded connection.

4. The device for testing anisotropic conductivity of fluid according to claim 1, characterized in that: The piston (11) and the piston support rod (12) are connected by threading or welding.

5. The device for testing anisotropic conductivity of fluid according to claim 1, characterized in that: The piston (11) and the piston support rod (12) are integrally formed.

6. The device for testing anisotropic conductivity of fluid according to claim 1, characterized in that: The up and down movement of the piston support rod (12) is achieved manually or automatically by a motor.

7. A device for testing anisotropic conductivity of fluid according to claim 1, characterized in that: The conductivity tester is a conductivity tester or an electrochemical workstation.

8. The device for testing anisotropic conductivity of fluid according to claim 1, characterized in that: The valve (5) is connected to the flow chamber (2) by welding or threading.

9. The device for testing anisotropic conductivity of fluid according to claim 1, characterized in that: The flow cavity (2) is a pipe with a length-to-diameter ratio greater than 5:

1.

10. The device for testing anisotropic conductivity of fluid according to claim 1, characterized in that: The flow cavity (2) is a square or circular pipe.

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