Leather air permeability testing device

Abstract

The utility model provides a leather air permeability testing device which comprises a device body, a main sealing cabin and a negative pressure machine are fixedly installed in the device body, the bottom of the main sealing cabin is connected with a negative pressure cabin in a sealing mode, the main sealing cabin is communicated with the negative pressure cabin through an assembly opening, the assembly opening is fixedly provided with a steel mesh plate, and the negative pressure machine is communicated with the negative pressure cabin through a pipeline. The top of the main sealed cabin is provided with a test cabin, the test cabin is fixedly provided with an air flow detector, the main sealed cabin is provided with a feeding and discharging port, and the feeding and discharging port is provided with a sealing door. During testing, a worker directly lays leather on the steel mesh plate, after the sealing door is closed, under the negative pressure effect of the negative pressure cabin, air in the main sealing cabin penetrates through the leather and enters the negative pressure cabin, the pressure intensity of the main sealing cabin is reduced, then air is sucked from the outside through the air flow detector, and the air permeability of the leather is detected through the air flow detector; the air tightness test can be quickly completed and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of leather detection, and particularly relates to a leather air permeability testing device. Background Art

[0002] Leather is a material that has been physically and chemically processed, such as hair removal and tanning, and has become a material that is not easily perishable and has stable properties. This material is composed of natural protein fibers tightly intertwined in three-dimensional space, forming a unique grain layer, showing natural grain and luster, and having a soft and comfortable touch. Air permeability is one of the many valuable properties of leather. Like water vapor permeability, it is a key indicator for measuring the hygienic performance of leather, and this property is directly related to the comfort experience during wearing. In order to ensure that the air permeability of leather meets specific standards, an air permeability detector must be used to accurately measure it during the leather processing process.

[0003] The air permeability detector generally uses the differential pressure method as the test principle. This method evaluates the ability of air to pass through leather by measuring the pressure difference of air on both sides of the leather sample. Specifically, during the test, a gas with a certain pressure is applied to one side of the leather sample, and then the pressure change or flow rate after passing through the leather is measured on the other side to obtain the air permeability index of the leather. Through this method, the air permeability of leather products can be ensured.

[0004] The authorized announcement number CN220854556U discloses a leather air permeability tester, which belongs to the related technical field of leather air permeability detection. By correspondingly setting a positioning mechanism, when detecting leather, the positioning effect of the leather can be achieved through the set positioning mechanism. During operation, the leather can be placed on the workbench and inside the cavity. Then, according to the size of the leather, the position of the positioning plate is adjusted. When adjusting, the rotation motor can be started. The start of the rotation motor drives the positioning plate to the positioning side of the leather. Then, by starting two electric push rods, the movable block is pushed downward, thereby squeezing the spring. The spring can play an auxiliary role. At the same time, the downward movement of the movable block drives the positioning plate to move downward, so that the two positioning plates tightly press both sides of the leather respectively, thereby achieving the purpose of positioning the leather. At the same time, the position of the positioning plate can also be adjusted for leathers of different sizes, which can improve the practicability of the device. However, when testing each piece of leather, it is necessary to repeatedly press and fix, and the efficiency is very low. Content of the Utility Model

[0005] The purpose of the utility model is to provide a leather air permeability testing device to solve the problems raised in the above background art.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A leather air permeability testing device, including a device body, a main sealing chamber and a negative pressure machine are fixedly installed inside the device body, the bottom of the main sealing chamber is hermetically connected to a negative pressure chamber, the main sealing chamber is conductively connected to the negative pressure chamber through an assembly port, a steel mesh plate is fixedly installed at the assembly port, the negative pressure machine is conductively connected to the negative pressure chamber through a pipeline, a testing chamber is provided at the top of the main sealing chamber, an air flow detector is fixedly installed in the testing chamber, the main sealing chamber is provided with a feeding and discharging port, and a sealing door is installed at the feeding and discharging port.

[0007] Preferably, a soft rubber mesh is fixedly installed on the steel mesh plate.

[0008] Preferably, the soft rubber mesh is made of polyurethane rubber.

[0009] Preferably, an observation window is fixedly installed on the sealing door.

[0010] Preferably, a protective plate is fixedly installed at the top of the testing chamber.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] The present utility model is provided with a main sealing chamber, a negative pressure chamber and a testing chamber. The negative pressure chamber is connected to a negative pressure machine, which is used to suck the negative pressure chamber to generate negative pressure in the negative pressure chamber, forcing the air in the main sealing chamber to enter the negative pressure chamber through the steel mesh plate. An air flow detector is installed in the testing chamber, and the air flow detector is communicated with the main sealing chamber. The main sealing chamber is directly communicated with the negative pressure chamber through the assembly port, and a steel mesh plate is fixedly installed at the assembly port. During the test, the worker directly lays the leather on the steel mesh plate. After closing the sealing door, under the negative pressure of the negative pressure chamber, the air in the main sealing chamber passes through the leather and enters the negative pressure chamber, the pressure in the main sealing chamber decreases, and then air is sucked from the outside through the air flow detector, so that the air flow detector can detect the air permeability of the leather, quickly complete the airtightness test, and improve work efficiency. Description of the Drawings

[0013] Figure 1 It is a structural view of the closed state of the sealing door of the present utility model.

[0014] Figure 2 It is a structural view of the opened state of the sealing door of the present utility model.

[0015] Figure 3 It is a sectional structural view of the present utility model.

[0016] Figure 4 It is an exploded structural view of the steel mesh plate of the present utility model.

[0017] Labels in the figure: device body 1, main seal chamber 2, negative pressure machine 3, negative pressure chamber 4, assembly port 5, steel mesh plate 6, pipeline 7, test chamber 8, air flow detector 9, inlet and outlet 10, seal door 11, soft rubber mesh 12, observation window 13, protection plate 14. Specific implementation mode

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0019] Embodiment 1:

[0020] As Figures 1 - 4 shown, a leather air permeability test device provided by the present utility model includes a device body 1. A main seal chamber 2 and a negative pressure machine 3 are fixedly installed inside the device body 1. The bottom of the main seal chamber 2 is hermetically connected to a negative pressure chamber 4. The main seal chamber 2 is conductively connected to the negative pressure chamber 4 through an assembly port 5. A steel mesh plate 6 is fixedly installed at the assembly port 5. The negative pressure machine 3 is conductively connected to the negative pressure chamber 4 through a pipeline 7. A test chamber 8 is provided at the top of the main seal chamber 2. An air flow detector 9 is fixedly installed in the test chamber 8. The main seal chamber 2 is provided with an inlet and outlet 10, and a seal door 11 is installed at the inlet and outlet 10. A soft rubber mesh 12 is fixedly installed on the steel mesh plate 6. The material of the soft rubber mesh 12 is polyurethane rubber. An observation window 13 is fixedly installed on the seal door 11. A protection plate 14 is fixedly installed at the top of the test chamber 8.

[0021] Through the above technical solution, the present utility model is provided with a main seal chamber 2, a negative pressure chamber 4 and a test chamber 8. The negative pressure chamber 4 is connected to a negative pressure machine 3 for sucking the negative pressure chamber 4 to generate negative pressure in the negative pressure chamber 4, forcing the air in the main seal chamber 2 to enter the negative pressure chamber 4 through the steel mesh plate 6. An air flow detector 9 is installed in the test chamber 8. The air flow detector 9 is communicated with the main seal chamber 2. The main seal chamber 2 is directly communicated with the negative pressure chamber 4 through the assembly port 5. A steel mesh plate 6 is fixedly installed at the assembly port 5. During the test, the worker directly lays the leather on the steel mesh plate 6. After closing the seal door 11, under the negative pressure of the negative pressure chamber 4, the air in the main seal chamber 2 passes through the leather and enters the negative pressure chamber 4. The pressure in the main seal chamber 2 decreases, and then the air is sucked from the outside through the air flow detector 9, so that the air flow detector 9 detects the air permeability of the leather, quickly completes the airtightness test, and improves the work efficiency.

[0022] Embodiment 2:

[0023] As Figures 1 - 4As shown, the technical solution aims to improve the efficiency of leather air permeability testing and solve the problem of low efficiency of existing equipment during the testing process through a leather air permeability testing device. The utility model includes a device body 1 with a main sealing chamber 2 and a negative pressure machine 3 inside. The main sealing chamber 2 is used to place and take leather, while the negative pressure machine 3 is used to generate negative pressure to force gas through the leather to complete the air permeability test.

[0024] The bottom of the main sealing chamber 2 is hermetically connected to the negative pressure chamber 4, and the negative pressure machine 3 is connected to the negative pressure chamber 4 through a pipeline 7 to make the negative pressure chamber 4 generate negative pressure. The main sealing chamber 2 and the negative pressure chamber 4 are connected through an assembly port 5, and a steel mesh plate 6 is fixedly installed on the assembly port 5. The role of the steel mesh plate 6 is to provide laying support, facilitate the laying of leather for air permeability testing, and complete the air permeability test. During the test, workers lay the leather on the steel mesh plate 6 to ensure that the leather can be affected by negative pressure, forcing air to pass through the leather, so as to obtain accurate air permeability test results.

[0025] The negative pressure machine 3 transmits the negative pressure effect to the negative pressure chamber 4 through the pipeline 7, so that the air inside the negative pressure chamber 4 is sucked out. Due to the decrease in the air pressure inside the negative pressure chamber 4, the air in the main sealing chamber 2 will also be affected, causing the air to pass through the leather under the action of pressure. This negative pressure effect causes the air pressure in the main sealing chamber 2 to gradually decrease, thereby realizing the measurement of leather air permeability. To further improve the accuracy of the test, a test chamber 8 is equipped at the top of the main sealing chamber 2. A wind flow detector 9 is fixedly installed in the test chamber 8 to measure the air flow passing through the leather.

[0026] During the test, external air enters the main sealing chamber 2 through the wind flow detector 9 of the test chamber 8 and measures the air permeability of the leather. The wind flow detector 9 can accurately record the change of air flow, thereby providing detailed data on the air permeability of the leather. These data can be used to judge whether the air permeability of the leather meets the predetermined standards.

[0027] In addition, the main sealing chamber 2 is provided with a loading and unloading port 10 through which workers can place and take out the leather. To ensure that the air in the main sealing chamber 2 does not leak during the test, the loading and unloading port 10 is equipped with a sealing door 11. The setting of the sealing door 11 can effectively prevent air leakage and improve the accuracy of the test.

[0028] The utility model simplifies the operation process of leather air permeability testing and improves the test efficiency. Through the application of the negative pressure machine 3, the leather air permeability test can be completed in a shorter time, and at the same time, the inefficient operation of repeatedly pressing and fixing the leather in the traditional method is avoided. The addition of the wind flow detector 9 further improves the measurement accuracy, making the test results more reliable.

[0029] On the stencil plate 6 of the present utility model, a soft rubber mesh 12 is fixedly installed. The soft rubber mesh 12 is arranged at the top of the stencil plate 6 and is in direct contact with the leather sample during the leather breathability test. The main function of the soft rubber mesh 12 is to protect the leather to prevent it from being damaged during the test. The material of the soft rubber mesh 12 has a certain softness, which can effectively relieve the pressure exerted by the stencil plate 6 on the leather sample and reduce indentations or damages caused by the direct contact between the stencil plate 6 and the leather. During the actual breathability test, the leather sample is laid on the stencil plate 6. Since the surface of the leather sample is usually relatively fragile or easily damaged, if the surface of the stencil plate 6 directly contacts the leather sample, it will cause unnecessary friction or indentations on the leather, thus affecting the accuracy of the test results. To avoid this situation, the soft rubber mesh 12 is placed on the stencil plate 6 and plays a protective role through direct contact with the leather sample. The presence of the soft rubber mesh 12 enables the leather sample to remain intact during the test and will not be adversely affected by the direct contact with the hard stencil plate 6. The material of the soft rubber mesh 12 has good flexibility and elasticity, and these performance characteristics help to disperse the pressure acting on the leather sample during the test, apply force evenly, and thus prevent local areas from being damaged due to excessive pressure. The surface of the soft rubber mesh 12 has a certain texture, which can enhance the friction between it and the leather sample, ensure that the leather does not slide or shift during the test, and keep its position stable. At the same time, it can also enhance the airtightness of the contact between the leather and the stencil plate 6 during the breathability test.

[0030] The material of the soft rubber mesh 12 of the present utility model is polyurethane rubber. Polyurethane rubber is a commonly used elastic material with excellent flexibility and wear resistance. During the leather breathability test, the polyurethane rubber soft rubber mesh 12 is in direct contact with the leather sample, providing a protective effect to prevent the leather from being damaged during the test. The softness of the polyurethane rubber enables it to effectively relieve the pressure between the stencil plate 6 and the leather sample and reduce indentations or damages caused by the direct contact of the hard stencil plate 6 with the leather. The elastic characteristics of the polyurethane rubber allow the soft rubber mesh 12 to deform when pressure is applied, thereby dispersing the force acting on the leather sample and ensuring that the leather surface remains intact. The wear resistance of the polyurethane rubber also ensures the stability of the soft rubber mesh 12 during long-term use, and it is not prone to material deterioration or breakage, which is of great significance for ensuring the accuracy of the test results and the long-term use of the equipment.

[0031] An observation window 13 is fixedly installed on the sealing door 11 of the present utility model. The main purpose of this setting is to facilitate workers to observe the conditions inside the main sealing chamber 2 during the test, and ensure whether the leather samples are placed correctly. The design of the observation window 13 enables workers to directly view the inside of the main sealing chamber 2 without opening the sealing door 11. In terms of the material selection of the observation window 13, a transparent and pressure-resistant material such as tempered glass is used, which can ensure that the images seen by workers through the observation window 13 are clear and real. The transparency of the observation window 13 allows workers to monitor the state of the leather samples in real time, and check whether there are wrinkles, folds or other situations that affect the test results caused by improper laying. If the leather samples are not placed correctly, workers can discover the problems in time through the observation window 13 and make adjustments, so as to ensure the accuracy of the test results.

[0032] A protective plate 14 is provided on the top of the test chamber 8 of the present utility model. The top of the test chamber 8 is connected to the outside air through the protective plate 14. Air first enters the test chamber 8 through the protective plate 14, and then flows into the main sealing chamber 2 through the air flow detector 9, thus completing the air permeability test of the leather. The main function of the protective plate 14 is to protect the air flow detector 9 inside the test chamber 8 from being damaged during use.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0034] As mentioned above, it is only used to illustrate the technical solution of the present utility model and not to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, shall all be covered by the scope of the claims of this utility model.

Claims

1. A leather breathability testing device, comprising a device body, characterized in that, A main seal chamber and a negative pressure machine are fixedly installed inside the device body. The bottom of the main seal chamber is hermetically connected to a negative pressure chamber. The main seal chamber is conductively connected to the negative pressure chamber through an assembly port. A steel mesh plate is fixedly installed at the assembly port. The negative pressure machine is conductively connected to the negative pressure chamber through a pipeline. A test chamber is provided at the top of the main seal chamber. An air flow detector is fixedly installed in the test chamber. The main seal chamber is provided with a feeding and discharging port, and a sealing door is installed at the feeding and discharging port.

2. The leather breathability testing device according to claim 1, characterized in that, A soft rubber mesh is fixedly installed on the steel mesh plate.

3. The leather breathability testing device according to claim 2, wherein, The soft rubber mesh is made of polyurethane rubber.

4. A leather breathability testing device according to claim 1, characterized in that, An observation window is fixedly installed on the sealing door.

5. The leather breathability testing device according to claim 1, characterized in that, A protection plate is fixedly installed at the top of the test chamber.

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