A whole shoe breathability testing device

Abstract

The utility model provides a whole shoe breathability testing arrangement belongs to footwear detection technical field. It solved the problem that only the determination of the vamp material breathability on the existing market can not reflect the breathability of whole shoes. The whole shoe breathability testing arrangement, including air pump, pressure regulating valve, mass flow controller, custom plug, pressure sensor and computer, is provided with the air pipe and pressure measuring tube on the custom plug, and air pump, pressure regulating valve and mass flow controller are all connected through the air pipe, the pressure regulating valve is connected in the air pump export, is used for adjusting gas pressure, mass flow controller is connected in the downstream of pressure regulating valve, is used for controlling gas flow, pressure sensor is communicated with the inside of shoe cavity through pressure measuring tube, the utility model has two kinds of measurement mode of footwear breathability of constant flow method and constant pressure difference method, and the user can select the appropriate mode according to different test standards and demand, and the application range has the advantages of wider.

Description

Technical Field

[0001] This utility model belongs to the field of footwear testing technology, and relates to a testing device, particularly a whole shoe breathability testing device. Background Technology

[0002] Breathability of footwear is one of the key indicators affecting wearing comfort. Currently, the main methods for evaluating the breathability of footwear include GB / T 5453-1997 "Determination of Air Permeability of Textile Fabrics" and GB / T 33393-2023 "Test Methods for Whole Footwear: Determination of Thermal and Moisture Resistance". The former is limited to the determination of the breathability of the upper material and cannot reflect the breathability of the whole shoe; the latter is used to determine the moisture resistance of the whole shoe. However, water vapor permeability and air permeability are two completely different physical concepts. Air permeability measures the airflow under dynamic conditions and is also essential for the evaluation of the comfort of the whole shoe. Therefore, designing a whole shoe breathability testing device is of great significance. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a whole-shoe breathability testing device.

[0004] The objective of this utility model can be achieved through the following technical solution: A whole-shoe breathability testing device, characterized in that it includes an air pump, a pressure regulating valve, a mass flow controller, a custom plug, a pressure sensor, and a computer. The custom plug is provided with a vent pipe and a pressure measuring pipe, and the air pump, pressure regulating valve, and mass flow controller are all connected through the vent pipe. The pressure regulating valve is connected to the outlet of the air pump for regulating gas pressure. The mass flow controller is connected downstream of the pressure regulating valve for controlling gas flow. The pressure sensor is connected to the inside of the shoe cavity through the pressure measuring pipe for detecting the pressure inside the shoe cavity. The computer communicates with the pressure sensor and the mass flow controller through a USB serial port for controlling gas flow, collecting pressure data, and processing test results.

[0005] In the aforementioned whole-shoe breathability testing device, the customized plug is fixed to the shoe opening with sealant to achieve a seal at the shoe opening.

[0006] In the aforementioned whole-shoe breathability testing device, the mass flow controller supports two testing modes: constant flow rate method and constant pressure difference method.

[0007] In the aforementioned whole shoe breathability testing device, the ventilation tube and pressure testing tube are installed in a custom plug through a detachable structure. The custom plug has an installation groove on one side for installing the ventilation tube and pressure testing tube, and the inner wall of the installation groove is provided with a thread.

[0008] In the above-mentioned whole shoe breathability testing device, the surface of the ventilation tube and the pressure measuring tube are both fixedly provided with positioning shells, the surface of the positioning shells is rotatably provided with fixing shells, and the surface of the fixing shells is provided with threads that cooperate with the inner wall of the mounting groove.

[0009] In the above-mentioned whole shoe breathability testing device, the inner wall of the fixed shell is provided with an annular groove, the cross-sectional shape of the groove is T-shaped, and the surface of the positioning shell is provided with a slider that slides in the groove, and the cross-sectional shape of the slider is T-shaped.

[0010] Compared with existing technologies, this whole-shoe breathability testing device provides two methods for measuring the breathability of footwear: constant flow rate method and constant pressure difference method. Users can choose the appropriate mode according to different testing standards and needs, making it more widely applicable. The entire testing process is controlled by a computer-controlled mass flow controller, which automatically collects, displays and records pressure or flow data, greatly reducing human error and improving testing efficiency and repeatability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the whole shoe breathability testing device.

[0012] Figure 2 This is a cross-sectional schematic diagram of the custom-made plug for the whole shoe breathability testing device.

[0013] Figure 3 This is a whole shoe breathability testing device. Figure 2 Schematic diagram of the structure at point A in the middle.

[0014] In the diagram, 1. Air pump; 2. Pressure regulating valve; 3. Mass flow controller; 4. Custom plug; 5. Pressure sensor; 6. Computer; 7. Vent pipe; 8. Pressure measuring pipe; 9. Mounting groove; 10. Positioning shell; 11. Fixing shell; 12. Slide groove; 13. Slider. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figure 1-3As shown, this whole-shoe breathability testing device includes an air pump 1, a pressure regulating valve 2, a mass flow controller 3, a custom-made plug 4, a pressure sensor 5, and a computer 6. The custom-made plug 4 is equipped with a vent pipe 7 and a pressure measuring pipe 8. The air pump 1, pressure regulating valve 2, and mass flow controller 3 are all connected through the vent pipe 7. The pressure regulating valve 2 is connected to the outlet of the air pump 1 to regulate the gas pressure. The mass flow controller 3 is connected downstream of the pressure regulating valve 2 to control the gas flow rate. The pressure sensor 5 is connected to the inside of the shoe cavity through the pressure measuring pipe 8 to detect the pressure inside the shoe cavity. The computer 6 communicates with the pressure sensor 5 and the mass flow controller 3 via a USB serial port to control the gas flow. The test involves measuring, collecting pressure data, and processing the test results. The compressed air used in the test is generated by an air pump 1, undergoes initial pressure regulation and stabilization via a pressure regulating valve 2, and then enters a mass flow controller 3. The mass flow controller 3 is controlled by a computer 6 and can provide a constant flow of gas with extremely high precision. This gas is delivered through a pipeline to a vent pipe 7 on a custom plug 4, and then fills the shoe cavity with gas. A pressure measuring tube 8 is connected to a high-precision pressure sensor 5 to monitor the gas pressure inside the shoe cavity in real time. The pressure sensor 5 sends the pressure data to the computer 6 in real time via USB serial communication. The entire test is conducted in a constant temperature and humidity laboratory.

[0017] Preferably, the custom plug 4 is fixed to the shoe opening with sealant to achieve a seal. Before testing, the custom plug 4 needs to be firmly fixed to the shoe opening of the test shoe with sealant and leak detection is performed to ensure that the shoe opening is completely sealed. The custom plug 4 integrates a vent tube 7 and a pressure measuring tube 8 inside.

[0018] Preferably, the mass flow controller 3 supports two test modes: constant flow rate method and constant differential pressure method.

[0019] Constant flow rate method: The operator sets the test flow rate, pressure upper limit, pressure stabilization range and time, starts the test, observes the change of pressure sensor 5 value on the computer. If it does not change, the test flow rate needs to be increased and the test should be repeated. As the test proceeds, the pressure will gradually increase and stabilize at a certain value. After stabilizing for a period of time, the experiment will automatically end. The pressure value during the process is recorded and test data is generated.

[0020] Constant pressure difference method: Set the target pressure difference, start the experiment, and the software dynamically adjusts the flow rate of the mass flow controller 3 through the built-in PID control loop. The pressure difference is stabilized at the target value, the instantaneous flow rate is recorded, and the air permeability data is generated.

[0021] Preferably, the vent tube 7 and the pressure measuring tube 8 are installed in the custom plug 4 through a detachable structure. The custom plug 4 has an installation groove 9 on one side for installing the vent tube 7 and the pressure measuring tube 8, and the inner wall of the installation groove 9 is provided with a thread. The custom plug 4 integrates the vent tube 7 and the pressure measuring tube 8, which not only facilitates installation and disassembly, but also allows it to be adapted to various types of footwear by replacing the custom plug 4.

[0022] Preferably, a positioning shell 10 is fixedly provided on the surface of both the vent pipe 7 and the pressure measuring pipe 8. A fixing shell 11 is rotatably provided on the surface of the positioning shell 10, and the surface of the fixing shell 11 is provided with a threaded line that mates with the inner wall of the mounting groove 9. The vent pipe 7 and the pressure measuring pipe 8 are connected by a thread between the fixing shell 11 and the mounting groove 9, which makes it easy to install and remove the vent pipe 7 and the pressure measuring pipe 8, and thus facilitates the replacement of the customized plug 4.

[0023] Preferably, the inner wall of the fixed shell 11 is provided with an annular groove 12, the groove 12 has a T-shaped cross-section, and the surface of the positioning shell 10 is provided with a slider 13 that slides in the groove 12, and the slider 13 has a T-shaped cross-section. The cooperation between the slider 13 and the groove 12 enables the fixed shell 11 to rotate on the surface of the positioning shell 10, thereby enabling the fixed shell 11 to rotate and cooperate with the mounting groove 9 for connection and fixation.

[0024] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0025] Although this document uses a number of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A device for testing the breathability of an entire shoe, characterized in that, The system includes an air pump (1), a pressure regulating valve (2), a mass flow controller (3), a custom plug (4), a pressure sensor (5), and a computer (6). The custom plug (4) is equipped with a vent pipe (7) and a pressure measuring pipe (8). The air pump (1), the pressure regulating valve (2), and the mass flow controller (3) are all connected through the vent pipe (7). The pressure regulating valve (2) is connected to the outlet of the air pump (1) to regulate the gas pressure. The mass flow controller (3) is connected downstream of the pressure regulating valve (2) to control the gas flow. The pressure sensor (5) is connected to the inside of the shoe cavity through the pressure measuring pipe (8) to detect the pressure inside the shoe cavity. The computer (6) communicates with the pressure sensor (5) and the mass flow controller (3) through a USB serial port to control the gas flow, collect pressure data, and process test results.

2. The whole shoe breathability testing device according to claim 1, wherein, The custom plug (4) is fixed to the shoe opening with sealant and achieves a seal at the shoe opening.

3. The whole shoe breathability testing device according to claim 1, wherein, The mass flow controller (3) supports two test modes: constant flow rate method and constant pressure difference method.

4. The whole-shoe breathability testing device according to claim 1, characterized in that, The ventilation tube (7) and pressure measuring tube (8) are installed in the custom plug (4) through a detachable structure. The custom plug (4) has an installation groove (9) on one side for installing the ventilation tube (7) and pressure measuring tube (8), and the inner wall of the installation groove (9) is provided with a thread.

5. The whole-shoe breathability testing device according to claim 1, characterized in that, The vent pipe (7) and the pressure measuring pipe (8) are both fixedly provided with positioning shells (10), and the positioning shells (10) are rotatably provided with fixing shells (11), and the fixing shells (11) are provided with threads that cooperate with the inner wall of the mounting groove (9).

6. The whole-shoe breathability testing device according to claim 5, characterized in that, The inner wall of the fixed shell (11) is provided with an annular groove (12), the groove (12) has a T-shaped cross-section, and the surface of the positioning shell (10) is provided with a slider (13) that slides in the groove (12), and the slider (13) has a T-shaped cross-section.

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