Device for measuring porosity of carbon paper

Abstract

The utility model provides a device for measuring the porosity of carbon paper, which comprises a base arranged at a use place as required; the detection box body is arranged on the base, and an action space is arranged at the bottom of the detection box body; detection liquid is contained in the detection box body; the emitting mechanism is used for emitting light into the detection box body and is arranged on one side of the detection box body; the receiving mechanism is used for receiving light passing through the detection box body, is arranged on the base and is arranged in the action space; according to the device for measuring the porosity of the carbon paper, the carbon paper does not need to be operated, so that the condition of inaccurate measurement is avoided; in addition, the porosity is obtained in a liquid level difference mode, the drying and soaking time is saved, and the detection period is further shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a device for measuring the porosity of carbon paper. Background Art

[0002] Carbon paper is a porous material primarily composed of carbon fibers. Its high porosity allows gases to flow smoothly through it. This property makes carbon paper very useful in applications requiring gas flow, such as fuel cells. Furthermore, the porosity of carbon paper affects not only its air permeability but also its mechanical strength and other physical properties. Therefore, it is necessary to measure the porosity of carbon paper before use to ensure optimal subsequent use.

[0003] In the prior art, the porosity of carbon paper is measured by weighing. First, the carbon paper is dried for 24 hours and then weighed to obtain a first mass. Then, the carbon paper is immersed in a solution and taken out after 12 hours. The excess solution on the surface of the carbon paper is wiped with paper and weighed to obtain a second mass. The porosity of the carbon paper is calculated by combining the first and second masses using a formula.

[0004] However, in the prior art, when wiping the solution on the surface of carbon paper with paper, the solution in the pores will also be wiped off, resulting in an inaccurate second mass. If an inaccurate second mass is used, it will lead to a large error in the calculated porosity. In addition, the prior art requires a long time for drying and soaking during testing, which in turn increases the testing cycle. Utility Model Content

[0005] The purpose of this utility model is to provide a device for measuring the porosity of carbon paper, which can solve the above technical problems;

[0006] The utility model provides a device for measuring the porosity of carbon paper, comprising:

[0007] The base is set up at the place of use as needed;

[0008] The detection box is arranged on the base, and an action space is provided at the bottom of the detection box; and the detection liquid is contained in the detection box;

[0009] An emitting mechanism for emitting light into the detection box, which is arranged on one side of the detection box;

[0010] A receiving mechanism for receiving the light passing through the detection box is arranged on the base and placed in the action space.

[0011] As a further technical solution, a plurality of support rods are provided at the bottom of the detection box, and the plurality of support rods separate the detection box from the base to form an action space.

[0012] As a further technical solution, the detection box includes:

[0013] The sample part and the detection part are arranged on the base relative to each other;

[0014] The communication portion for connecting the sample portion and the detection portion is provided between the sample portion and the detection portion.

[0015] As a further technical solution, the connecting portion connects the sample portion and the bottom of the detection portion.

[0016] As a further technical solution, the launching mechanism includes:

[0017] A detection rod is arranged on the base;

[0018] The emitter is arranged on the detection rod and its position can be adjusted on the detection rod.

[0019] As a further technical solution, the emitter includes:

[0020] A connecting piece is provided on the detection rod;

[0021] The laser emitter is arranged on the connecting piece and is driven by the connecting piece to adjust its position on the detection rod.

[0022] As a further technical solution, a screw hole is provided on the connecting piece, and the bolt is passed through the screw hole to fix the connecting piece on the detection rod.

[0023] As a further technical solution, the receiving institutions include:

[0024] a slide plate, which is arranged on the base and placed in the action space;

[0025] A driving device is provided on the slide plate and performs linear motion on the slide plate;

[0026] The receiving group is set on the driving device and follows the driving device to perform linear motion.

[0027] As a further technical solution, the receiving group includes:

[0028] A mounting block, disposed on the driving device;

[0029] A receiving body, disposed on the mounting block;

[0030] The position emitter is arranged on one side of the mounting block.

[0031] Preferably, the receiver is a light sensor; and the position transmitter is a displacement sensor.

[0032] The technical solution of the present invention is to obtain a first liquid level by placing a detection box on a base and placing detection liquid in the detection box; emitting light into the detection box by a transmitting mechanism, and obtaining the position of the light by a receiving mechanism, thereby obtaining the first position; placing carbon paper in the detection box, causing the liquid level in the detection box to rise to obtain a second liquid level, and at the same time changing the position of the receiving mechanism to obtain light, thereby obtaining the second position; and calculating the porosity of the carbon paper by a formula based on the obtained liquid level difference; compared with the prior art, the technical solution of the present invention does not require operation of the carbon paper, thereby avoiding inaccurate measurement; in addition, obtaining the porosity by means of the liquid level difference saves the time for drying and soaking, thereby further reducing the detection cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a schematic structural diagram of a device for measuring the porosity of carbon paper according to the present invention;

[0035] Figure 2 This is a three-dimensional diagram of a carbon paper porosity measurement device according to the present invention at one angle;

[0036] Figure 3 This is a three-dimensional diagram of a carbon paper porosity measuring device according to the present invention from another angle;

[0037] Figure 4 This is a schematic diagram of the internal structure of the detection box in the present utility model;

[0038] Figure 5 Schematic diagram of the refraction principle of light at the first liquid level and the second liquid level.

[0039] Description of reference numerals:

[0040] 1-base; 2-detection box; 21-sample part; 22-detection part; 23-connecting part; 3-action space; 4-launching mechanism; 41-detection rod; 42-emitter; 421-connector; 422-laser emitter; 423-bolt; 5-receiving mechanism; 51-slide plate; 52-driving device; 53-receiving group; 531-mounting block; 532-receiving body; 533-position emitter; 6-support rod. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0044] like Figure 1-5 As shown, the present invention proposes a device for measuring the porosity of carbon paper, comprising:

[0045] The base 1 is arranged at the place of use as needed; in the present invention, the base 1 is a plate-like structure and can be directly placed at the place of use during the use phase; the detection box 2 is arranged on the base 1, and an action space 3 is provided at the bottom of the detection box 2; a detection liquid is contained in the detection box 2; in the present invention, preferably one of n-heptane, anhydrous ethanol or n-decane is contained in the detection box 2. Since the density of n-heptane, anhydrous ethanol and n-decane is lower than that of carbon paper, when the test is performed, the carbon paper will fall to the bottom of the detection box 2 after being placed in the detection box 2; a receiving mechanism 5 is arranged on the base 1 and placed in the action space 3, and receives light passing through the detection box 2 through the receiving mechanism 5;

[0046] like Figure 5 As shown, the test liquid is placed in the test box 2, and the liquid level is at a first liquid level Y1. The transmitting mechanism 4 is arranged on one side of the test box 2, and the transmitting mechanism 4 transmits light G into the test box 2. After passing through the test box 2, the light G is refracted once and enters the test liquid after the first refraction. It is refracted twice at the position of the first liquid level Y1, and the light G1 after the second refraction reaches the receiving mechanism 5. The receiving mechanism 5 determines the position of the light G1 after the second refraction, and the position of G1 is recorded as position A.

[0047] Carbon paper is placed in the detection box 2. The level of the detection liquid in the detection box 2 rises to a second level Y2. Light G is emitted into the detection box 2 by the emitting mechanism 4. Light G passes through the detection box 2 and undergoes a primary refraction. After the primary refraction, it enters the detection liquid and undergoes a secondary refraction at the second level Y2. The secondary refracted light G2 reaches the receiving mechanism 5, and the position of the secondary refracted light G2 is determined by the receiving mechanism 5. The position of G2 is recorded as position B.

[0048] The liquid level difference can be calculated using the sine and cosine theorems in the prior art; the skeleton volume of the carbon paper can be calculated using the relationship between the bottom area and the liquid level difference; and the porosity can be calculated using the following formula:

[0049]

[0050] The apparent volume is obtained by the length, width, and thickness of the carbon paper. It should be noted that the formula and the liquid level difference calculation method can be written into the chip of the prior art, and the data of the carbon paper can be recorded before use. The data of the receiving mechanism 5 can be obtained through the chip, and the porosity can be finally obtained by calculation. Since the prior art is used, the present invention does not further limit this. It should be noted that in the present invention, the detection box 2 is preferably glass, and the refractive index of the glass is 1.5; the detection liquid is preferably n-heptane, and the refractive index of n-heptane is 1.394.

[0051] like Figure 2-3 As shown, a plurality of support rods 6 are provided at the bottom of the detection box 2, and the support rods 6 separate the detection box 2 from the base 1 to form an action space 3. During the use phase, the receiving mechanism 5 can move within the action space 3 to avoid contact with the detection box 2. At the same time, since the action space 3 is located at the bottom of the detection box 2, when the receiving mechanism 5 is in motion, it can directly receive light passing through the bottom of the detection box 2.

[0052] like Figure 4As shown, the detection box 2 includes a sample portion 21, a detection portion 22 and a connecting portion 23. The sample portion 21 and the detection portion 22 are relatively arranged on the base 1; the connecting portion 23 is arranged between the sample portion 21 and the detection portion 22; the sample portion 21 and the detection portion 22 are connected through the connecting portion 23. Specifically, the connecting portion 23 connects the sample portion 21 with the bottom of the detection portion 22; when the test liquid is placed in the detection box 2, due to the presence of the connecting portion 23, it will be placed in the sample portion 21, the connecting portion 23 and the detection portion 22; and due to The sample section 21 and the detection section 22 are connected, so the liquid levels in the sample section 21 and the detection section 22 are the same, at a first liquid level Y1. When carbon paper is placed through the sample section 21, the density of the detection liquid is lower than that of the carbon paper, so the carbon paper sinks to the bottom of the sample section 21. The liquid levels in the sample section 21 and the detection section 22 rise, forming a second liquid level Y2. During the detection phase, light enters the detection section 22 after passing through the sidewalls of the detection section 22, and in different states, detection is completed by passing through the first liquid level or the second liquid level.

[0053] like Figure 2 and 3 As shown, the emitting mechanism 4 includes a detection rod 41 and an emitter 42, and the detection rod 41 is arranged on the base 1; the emitter 42 is arranged on the detection rod 41 and can adjust its position on the detection rod 41; the emitter 42 can adjust its position on the detection rod 41, and after the adjustment is completed, it emits light to enter the detection part 22; wherein, the emitter 42 includes a connecting member 421 and a laser emitter 422, and the connecting member 421 is arranged on the detection rod 41; the laser emitter 422 is arranged on the connecting member 421, and is adjusted to its position on the detection rod 41 under the drive of the connecting member 421; the position of the connecting member 421 on the detection rod 41 is adjusted as needed, and the laser emitter 422 is driven to move simultaneously by the connecting member 421; when the adjustment is completed, the laser emitter 422 is fixed to the detection rod 41 by fixing the connecting member 421; specifically, a screw hole is provided on the connecting member 421, and the bolt 423 fixes the connecting member 421 to the detection rod 41 after passing through the screw hole.

[0054] The receiving mechanism 5 includes a slide plate 51, a driving device 52 and a receiving group 53. The slide plate 51 is arranged on the base 1 and placed in the action space 3; the driving device 52 is arranged on the slide plate 51 and performs linear motion on the slide plate 51; the receiving group 53 is arranged on the driving device 52 and follows the driving device 52 to perform linear motion; specifically, a slider is relatively arranged on the slide plate 51, and the driving device 52 moves on the slider and drives the receiving group 53 to simultaneously change the position of the receiving group 53; in the utility model, the preferred driving device 52 is a linear motor; wherein the receiving group 53 includes a mounting block 531, a receiving body 532 and a position transmitter 533, the mounting block 531 is provided with a receiving body 532 and a position transmitter 533. The mounting block 531 is arranged on the driving device 52; the receiving body 532 is arranged on the mounting block 531; the position transmitter 533 is arranged on one side of the mounting block 531; the position of the mounting block 531 is changed by the driving device 52, and then the position of the receiving body 532 is changed, when the receiving body 532 receives the light, a signal is generated and given to the position transmitter 533, and a position signal is generated through the position transmitter 533; preferably, the receiving body 532 is a light sensor; the position transmitter 533 is a displacement sensor; it should be noted that a PLC circuit board is arranged on the mounting block 531, and the signal of the transmitter 42 is obtained through the PLC circuit board and the position transmitter 533 is controlled to generate a position signal.

[0055] In actual use, after the light G1 refracted by the first liquid surface Y1 is received by the receiver 532, the position transmitter 533 generates a position A signal; after the carbon paper is placed, the position of the receiver 532 is adjusted by the driving device 52, and the receiver 532 is enabled to receive the light G2 refracted by the second liquid surface Y2, and the position transmitter 533 generates a position B signal.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring the porosity of carbon paper, characterized in that: include: A base (1) is provided at a location of use as required; A detection box (2) is arranged on the base (1), and an action space (3) is provided at the bottom of the detection box (2); and a detection liquid is contained in the detection box (2); An emitting mechanism (4) for emitting light into the detection box (2), arranged on one side of the detection box (2); A receiving mechanism (5) for receiving light passing through the detection box (2) is arranged on the base (1) and placed in the action space (3).

2. The carbon paper porosity measuring device according to claim 1, characterized in that: A plurality of support rods (6) are provided at the bottom of the detection box (2), and the plurality of support rods (6) separate the detection box (2) from the base (1) to form an action space (3).

3. The carbon paper porosity measuring device according to claim 1, characterized in that: The detection box (2) comprises: The sample part (21) and the detection part (22) are arranged on the base (1) in a relative manner; A communication portion (23) for connecting the sample portion (21) with the detection portion (22) is provided between the sample portion (21) and the detection portion (22).

4. The carbon paper porosity measuring device according to claim 3, characterized in that: The communication portion (23) connects the sample portion (21) and the bottom of the detection portion (22).

5. The carbon paper porosity measuring device according to claim 1, characterized in that: The launching mechanism (4) comprises: A detection rod (41) is arranged on the base (1); The emitter (42) is arranged on the detection rod (41) and can adjust its position on the detection rod (41).

6. The carbon paper porosity measuring device according to claim 5, characterized in that: The emitter (42) includes: A connecting member (421) is provided on the detection rod (41); The laser emitter (422) is arranged on the connecting member (421) and is driven by the connecting member (421) to adjust its position on the detection rod (41).

7. The carbon paper porosity measuring device according to claim 6, characterized in that: The connecting member (421) is provided with a screw hole, and the bolt (423) passes through the screw hole to fix the connecting member (421) on the detection rod (41).

8. The carbon paper porosity measuring device according to claim 1, characterized in that: The receiving mechanism (5) comprises: A slide plate (51) is arranged on the base (1) and placed in the action space (3); A driving device (52) is provided on the slide plate (51) and performs linear motion on the slide plate (51); The receiving group (53) is arranged on the driving device (52) and follows the driving device (52) to perform linear motion.

9. The carbon paper porosity measuring device according to claim 8, characterized in that: The receiving group (53) includes: A mounting block (531) is provided on the driving device (52); A receiving body (532) is provided on the mounting block (531); The position emitter (533) is arranged on one side of the mounting block (531).

10. The carbon paper porosity measuring device according to claim 9, characterized in that: The receiving body (532) is a light sensor; the position emitting body (533) is a displacement sensor.

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