Ceramic pore air permeability detection mechanism

Abstract

The utility model discloses a ceramic pore air permeability detection mechanism. Comprising a detection table, the detection table comprises a detection seat, the detection seat comprises an accommodating cavity for accommodating a to-be-detected product, and an air inlet channel and an air outlet channel which are in fluid communication with the accommodating cavity; the gas inlet unit comprises a throttling valve, a pressure regulating valve, a first gas pressure meter and a first gas flow meter which are sequentially communicated through pipelines, and the gas flow meter is communicated with the gas inlet channel through a pipeline; the gas outlet unit comprises a stop valve, a second gas pressure meter and a second gas flow meter which are sequentially communicated through a pipeline, and the second gas flow meter is communicated with the gas outlet channel through the pipeline. According to the utility model, the gas storage tank is used for stabilizing the pressure and the flow of the gas passing through the hole, the throttle valve is used for accurately controlling the gas flow, the gas flowmeter and the barometer are used for measuring the flow and the pressure data of the gas in different front and back states, the porosity of the porous ceramic can be obtained by calculating and / or analyzing the data, the structure is simple, the operation is convenient, and the cost is low. The detection result is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a ceramic pore permeability detection mechanism. Background Art

[0002] Porous ceramics are a type of ceramic material with open pore diameters and high open porosity. They can be used for precision filtration and separation of various media, high-pressure gas exhaust silencing, gas distribution, and electrolytic diaphragms.

[0003] The porosity permeability of porous ceramics refers to the percentage of the volume of the pores in the porous material to the total volume of the material. This parameter is the most important characteristic of porous ceramic materials because it not only affects the mechanical properties of the material, but also affects the use effect of the material. First of all, the larger the porosity, the larger the specific surface area of ​​the material, which means that the material can better absorb and diffuse the load. But at the same time, the porosity will also reduce the mechanical strength of the material. Therefore, choosing the right porosity is crucial in the application of porous ceramic materials. Secondly, the porosity will also affect the use effect of the material.

[0004] Therefore, it is necessary to test the pore permeability of porous ceramics, which can help us understand the performance and characteristics of the materials and better apply these materials.

[0005] The air permeability detection technology of porous ceramics mainly includes the following methods:

[0006] Displacement method: This method is based on the principle of buoyancy. By measuring the weight and volume of water displaced from the liquid, the density of the object can be calculated, and thus the porosity can be calculated.

[0007] Gas adsorption method: This method uses the isothermal adsorption principle of gas on porous materials. By measuring the pressure difference of the adsorbed gas on the surface of the material and combining it with the adsorption isotherm, the porosity of the material can be calculated.

[0008] Small-angle scattering method: This method is based on the scattering principle of X-rays, neutron beams and other rays by holes. By measuring the scattering angle and scattering intensity, the aperture distribution can be characterized.

[0009] Thermoporometer method: This method characterizes the pore size distribution and pore size based on the thermal effect when the liquid solidifies in the pores of porous materials.

[0010] The existing porosity permeability testing has the following problems:

[0011] 1. Low detection accuracy: Due to the complex structure of porous ceramics and uneven porosity distribution, it is difficult to obtain high-precision porosity measurement results using conventional detection methods.

[0012] 2. The detection process is complicated: The porosity detection of porous ceramics requires multiple steps, including sample preparation, construction of experimental equipment, setting of measurement parameters, etc. The operation process is relatively complicated and requires professional technicians to operate.

[0013] 3. High cost: The porosity detection of porous ceramics requires the use of high-precision measuring instruments and equipment. The purchase and maintenance costs of these equipment are high, which increases the detection cost. Utility Model Content

[0014] The utility model aims at the deficiencies in the prior art and provides a ceramic pore air permeability detection mechanism.

[0015] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0016] Ceramic porosity and air permeability testing institutions, including

[0017] A testing platform, comprising a testing seat, wherein the testing seat comprises a receiving cavity for receiving the product to be tested and an air inlet channel and an air outlet channel in fluid communication with the receiving cavity;

[0018] an air intake unit, comprising a throttle valve, a pressure regulating valve, a first air pressure gauge and a first gas flow meter which are sequentially connected by pipelines, wherein the first gas flow meter is connected to the air intake passage through a pipeline; and

[0019] The gas outlet unit comprises a stop valve, a second pressure gauge and a second gas flow meter which are connected in sequence through pipelines, and the second gas flow meter is connected to the gas outlet channel through a pipeline.

[0020] In the above scheme, preferably, the throttle valve is connected to an air storage tank through a pipeline, and the air storage tank is connected to an external air pipe.

[0021] In the above scheme, preferably, the detection seat includes a detection seat body and a detection seat cover;

[0022] The accommodating cavity is disposed on the main body of the detection seat and is in fluid communication with an air inlet passage disposed on the main body of the detection seat;

[0023] The detection seat cover is detachably mounted on the detection seat body, and the air outlet channel is opened on the detection seat cover. When the detection seat cover is fixed on the detection seat body, the detection seat cover covers the accommodating cavity and enables the air outlet channel to communicate with the accommodating cavity fluid.

[0024] In the above scheme, preferably, the bottom surface of the detection seat cover includes a sealing block that is adapted to the shape and size of the upper opening of the accommodating cavity, and the lower opening of the air outlet channel is opened on the sealing block, so that when the sealing block seals the upper opening of the accommodating cavity, the accommodating cavity and the air outlet channel remain connected.

[0025] In the above solution, preferably, the accommodating cavity comprises a lower cavity for placing the product to be detected and an upper cavity for matching with the sealing block, and the bottom of the lower cavity is in fluid communication with the air inlet channel.

[0026] In the above solution, preferably, the upper cavity and the sealing block are both conical in shape.

[0027] In the above scheme, preferably, an air inlet interface for connecting to a pipeline is installed at the air inlet of the air inlet channel, and an air outlet interface for connecting to a pipeline is installed at the air outlet of the air outlet channel.

[0028] In the above solution, preferably, a positioning unit is installed on the detection platform, and the detection seat cover is positioned on the detection seat body through the positioning unit.

[0029] In the above solution, preferably, the positioning unit is a quick-clamp fixture.

[0030] In the above scheme, preferably, the barometer is a digital barometer.

[0031] The beneficial effects of the utility model are:

[0032] The utility model uses a gas storage tank to stabilize the pressure and flow of gas passing through the opening, accurately controls the gas flow rate through a throttle valve, measures the flow rate and pressure data of the gas in different states before and after through a gas flow meter and a barometer, and obtains the porosity of the porous ceramic by calculating and / or analyzing these data. The utility model has a simple structure, is easy to operate, and has reliable detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the utility model.

[0034] Figure 2 This is a schematic diagram of the position layout of the detection seat and the positioning unit on the detection table of the utility model.

[0035] Figure 3 It is a schematic diagram of the cross-section state of the detection seat of the utility model.

[0036] Figure 4 It is a schematic diagram of the cross-section state of the detection seat cover of the utility model.

[0037] Figure 5 It is a schematic diagram of the cross-section state of the main body of the detection seat of the utility model. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods:

[0039] See also Figure 1-Figure 5 The ceramic porosity and air permeability detection mechanism comprises a detection platform 1, a detection seat 2, a positioning unit 3, an air inlet unit and an air outlet unit.

[0040] The detection seat 2 and the positioning unit 3 are installed on the upper surface of the detection platform 1. As one option, a plurality of supporting feet 11 can be installed on the detection platform 1, such as corresponding supporting feet 11 are respectively installed at the four corners of the detection platform 1.

[0041] like Figure 3-5 As shown, the detection seat 2 includes a detection seat body 21 and a detection seat cover 22 . The detection seat body 21 is installed on the upper surface of the detection platform 1 , and the detection seat cover 22 can be installed on the upper surface of the detection seat body 21 .

[0042] In this embodiment, a accommodating cavity is opened on the upper surface of the detection seat body 21, and the accommodating cavity includes an upper cavity 41 and a lower cavity 42 that are interconnected, wherein the lower cavity 42 is used to place the product 43 to be detected. As one of the options, the shape and size of the lower cavity 42 are adapted to the shape and size of the product 43 to be detected.

[0043] An air inlet channel 51 is provided on the detection seat body 21 , one end of the air inlet channel 51 is opened on the outer surface of the detection seat body 21 as an air inlet 52 , and an air inlet interface 53 can be installed at the air inlet 52 ; the other end of the air inlet channel 51 is opened and connected to the fluid of the lower cavity 42 .

[0044] The lower surface of the detection seat cover 22 includes a sealing block 44 that is adapted to the shape and size of the upper cavity 41. At the same time, an air outlet channel 54 is also provided on the detection seat cover 22. As one option, one end of the air outlet channel 54 is opened and arranged on the upper surface of the detection seat cover 22 as an air outlet 55, and an air outlet interface 56 can be installed at the air outlet 55; the other end of the air outlet channel 54 is opened and arranged at the sealing block 44, which penetrates the sealing block 44 and forms an opening at the bottom of the sealing block 44.

[0045] When the detection seat cover 22 is installed on the detection seat body 21, the sealing block 44 is placed in the upper cavity 41, and the lower surface of the detection seat cover 22 fits with the upper surface of the detection seat body 21 to form a seal, leaving only the air outlet channel 54 connected to the fluid of the upper cavity 41 as a gas flow path.

[0046] In this embodiment, the upper cavity 41 and the sealing block 44 are both conical in shape.

[0047] After the detection seat cover 22 is installed, the positioning unit 3 is used to effectively position it on the detection seat body 21 to improve the sealing effect between the detection seat cover 22 and the detection seat body 21. As one option, corresponding positioning units 3 are arranged on the left and right sides of the detection seat body 21, and the positioning unit 3 is a quick clamp, such as Figure 2 Shown is one type of quick-clamp clamp.

[0048] like Figure 1 As shown, the air intake unit includes an air storage tank 61, a throttle valve 62, a pressure regulating valve 63, a first air pressure gauge 64 and a first gas flow meter 65 which are connected in sequence by pipelines, wherein the air storage tank 61 is connected to an external air pipe 66, and the first gas flow meter 64 is connected to the air intake channel 51 through a pipeline; the air outlet unit includes a stop valve 71, a second air pressure gauge 72 and a second gas flow meter 73 which are connected in sequence by pipelines, and the second gas flow meter 73 is connected to the air outlet channel 54 through a pipeline.

[0049] As one of the options, the gas tank can be a 3L small gas tank, the throttle valve model can be LSA-08, the pressure regulating valve model can be AR2000-02+8, and the gas flow meter model can be MFM-20, which displays the accumulated flow and instantaneous flow rate, with a range of 0.2-20L / min and an accuracy of 0.01L / min. The pressure gauge is a digital pressure gauge.

[0050] Compressed air, helium and other gases are passed through the gas storage tank for pressure and flow stabilization to ensure the stability of gas pressure and flow. Then the gas flow is accurately adjusted through the throttle valve to allow the gas to pass through the detection seat equipped with porous ceramics at an appropriate speed.

[0051] After the gas flows through the detection fixture, the changes in gas flow and pressure are recorded. This change is related to the porosity of the porous ceramic. By calculating and analyzing these data, the porosity of the porous ceramic can be obtained.

[0052] In order to obtain more accurate results, you can wait for 3 to 5 seconds to allow the gas to fully flow in the test seat and reach a stable state. Then use the flow and pressure data of the front and rear gas flow meters and the digital pressure gauge. These data will be used to calculate the porosity of porous ceramics. In order to ensure the reliability of the results, you can measure multiple times and take the average value.

[0053] 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 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. Ceramic pore permeability detection mechanism, characterized by: include A testing platform, comprising a testing seat, wherein the testing seat comprises a receiving cavity for receiving the product to be tested and an air inlet channel and an air outlet channel in fluid communication with the receiving cavity; an air intake unit, comprising a throttle valve, a pressure regulating valve, a first air pressure gauge and a first gas flow meter which are sequentially connected by pipelines, wherein the first gas flow meter is connected to the air intake passage through a pipeline; and The gas outlet unit comprises a stop valve, a second pressure gauge and a second gas flow meter which are connected in sequence through pipelines, and the second gas flow meter is connected to the gas outlet channel through a pipeline.

2. The ceramic pore air permeability detection mechanism according to claim 1, characterized in that: The throttle valve is connected to an air storage tank through a pipeline, and the air storage tank is connected to an external air pipe.

3. The ceramic pore air permeability detection mechanism according to claim 1 or 2, characterized in that: The detection seat comprises a detection seat body and a detection seat cover plate; The accommodating cavity is disposed on the main body of the detection seat and is in fluid communication with an air inlet passage disposed on the main body of the detection seat; The detection seat cover is detachably mounted on the detection seat body, and the air outlet channel is opened on the detection seat cover. When the detection seat cover is fixed on the detection seat body, the detection seat cover covers the accommodating cavity and enables the air outlet channel to communicate with the accommodating cavity fluid.

4. The ceramic pore air permeability detection mechanism according to claim 3, characterized in that: The bottom surface of the detection seat cover includes a sealing block that is adapted to the shape and size of the upper opening of the accommodating cavity, and the lower opening of the air outlet channel is opened on the sealing block, so that when the sealing block seals the upper opening of the accommodating cavity, the accommodating cavity and the air outlet channel remain connected.

5. The ceramic pore air permeability detection mechanism according to claim 4, characterized in that: The accommodating cavity comprises a lower cavity for placing the product to be detected and an upper cavity for matching with the sealing block, and the bottom of the lower cavity is in fluid communication with the air inlet channel.

6. The ceramic pore air permeability detection mechanism according to claim 5, characterized in that: The upper cavity and the sealing block are both conical in shape.

7. The ceramic pore air permeability detection mechanism according to claim 1, characterized in that: An air inlet interface for connecting to a pipeline is installed at the air inlet of the air inlet channel, and an air outlet interface for connecting to a pipeline is installed at the air outlet of the air outlet channel.

8. The ceramic pore air permeability detection mechanism according to claim 3, characterized in that: A positioning unit is installed on the detection platform, and the detection seat cover is positioned on the detection seat body through the positioning unit.

9. The ceramic pore air permeability detection mechanism according to claim 8, characterized in that: The positioning unit is a quick-clamp fixture.

10. The ceramic pore air permeability detection mechanism according to claim 1, characterized in that: The barometer is a digital barometer.

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