Breathable film detection device

Abstract

The utility model relates to the technical field of gas-permeable membrane detection, in particular to a gas-permeable membrane detection device which comprises a gas washing bottle with a hollow accommodating cavity; the gas washing bottle is connected with a gas outlet pipe communicated with the accommodating cavity, and the gas outlet pipe is provided with a flow meter; the membrane fixing bottle is arranged in the gas washing bottle, and the side wall of the membrane fixing bottle is provided with a hollow hole suitable for being covered by the breathable membrane; one side, back on to the breathable film, of the opening is also connected with an inflation tube; a gas inlet pipe opening of the gas filling pipe penetrates through the gas washing bottle and then extends out of the gas washing bottle; the air inlet assembly comprises an air inlet pipe connected with the air inlet pipe opening of the inflation pipe, an air pump connected with the air inlet pipe and a U-shaped pipe which is communicated with the air inlet pipe and located between the air pump and the inflation pipe. According to the utility model, the detection device can be simplified to reduce the probability that the accuracy of the air permeability test result is influenced by the failure of the detection device.

Description

TECHNICAL FIELD

[0001] The utility model relates to breathable membrane detection technical field especially relates to a breathable membrane detection device. BACKGROUND

[0002] Breathable membrane is also called "waterproof breathable membrane microporous membrane", its characteristic is breathable and waterproof, microporous membrane has countless intercommunication micropore, its aperture is very fine, only water vapor molecules with about 0.4nm particle size can pass through, and any raindrop or water drop cannot pass through because its particle size is too large. Breathable membrane is applied in various fields, however, in the production and application process, in addition to the need for detecting and measuring the air permeability of the breathable membrane, different fields of application are distinguished according to the air permeability, the water pressure resistance of the breathable membrane also needs to be tested to ensure that the water pressure resistance performance of the breathable membrane can meet the use standard.

[0003] For this, the publication number CN214622224U discloses a film air permeability tester, which realizes the test of the air permeability of the breathable membrane through the cooperation of the gas storage tank, the inflation seat and the upper pressing plate. This test device can only detect the air permeability of the breathable membrane, and cannot simultaneously detect the water pressure resistance of the breathable membrane. Based on this structure, if the water pressure resistance performance of the breathable membrane needs to be tested, another set of detection device needs to be prepared, which not only causes the complication of the detection process, but also increases the cost of the detection device.

[0004] Based on the above situation, the publication number CN209117069U discloses a waterproof breathable membrane air permeability and waterproof grade integrated test device. The sealed product tooling includes an upper product tooling and a lower product tooling. The upper product tooling is detachably fixed on the lower product tooling by buckles and forms a sealed space with the lower product tooling through a sealing ring. The lower product tooling is a solid fixed table. A test tube is arranged on the lower product tooling. A waterproof breathable membrane is fixed on the lower product tooling and covers the outlet of the test tube. The upper product tooling is a hollow cover. An air outlet pipe is fixed on the upper product tooling. By injecting air and water into the measuring tube, the air permeability and water pressure resistance performance of the breathable membrane are tested. Through actual research, it is found that the test device has the risk of buckle fracture and sealing ring sealing failure after multiple uses due to the assembly structure of the product tooling, which affects the accuracy of the air permeability measurement result.

[0005] In summary, for the test of the air permeability and water pressure resistance performance of the breathable membrane, the measurement device needs to be further optimized to simplify the detection device and reduce the influence of the detection device failure on the accuracy of the air permeability test result. UTILITY MODEL CONTENTS

[0006] The utility model discloses a breathable film detection device to solve the technical problem of simplifying detection device to reduce the probability of the phenomenon of affecting the accuracy of the test result of the breathable amount because of the failure of the detection device.

[0007] The breathable film detection device is implemented as follows:

[0008] A breathable film detection device comprises:

[0009] A gas washing bottle has a hollow containing cavity; the gas washing bottle is connected with a gas outlet pipe communicated with the containing cavity, and the gas outlet pipe is provided with a flowmeter;

[0010] A film fixing bottle is arranged in the gas washing bottle, and the side wall of the film fixing bottle is provided with a hollow opening suitable for being covered by the breathable film; the side of the opening away from the breathable film is further connected with an inflation pipe; the gas inlet pipe of the inflation pipe penetrates through the gas washing bottle and extends out of the gas washing bottle; and

[0011] An air inlet assembly comprises an air inlet pipe connected with the gas inlet pipe of the inflation pipe, an air pump connected with the air inlet pipe, and a U-shaped pipe connected with the air inlet pipe and located between the air pump and the inflation pipe.

[0012] In the optional implementation of the utility model, the outer wall surface of the side end of the film fixing bottle, where the opening is formed, is a smooth surface.

[0013] In the optional implementation of the utility model, the film fixing bottle is a cuboid structure, and the opening is formed on one side end surface of the cuboid structure.

[0014] In the optional implementation of the utility model, the shape of the opening is rectangular, and the gas outlet pipe of the inflation pipe is suitable for covering the opening.

[0015] In the optional implementation of the utility model, the U-shaped pipe comprises a left vertical pipe and a right vertical pipe connected through the pipe; and

[0016] The left vertical pipe is higher than the right vertical pipe.

[0017] The right vertical pipe is connected with the air inlet pipe.

[0018] In the optional implementation of the utility model, the left vertical pipe is provided with a positive scale, and the right vertical pipe is provided with a negative scale; and

[0019] The zero point of the positive scale and the zero point of the negative scale are arranged in alignment.

[0020] In the optional implementation of the utility model, the top of the gas washing bottle is formed with an open mouth, and the bottom of the gas washing bottle is detachably connected with a bottle cap suitable for covering the open mouth; and

[0021] The gas outlet pipe is connected with the bottle cap.

[0022] In the optional implementation of the utility model, the bottle cap comprises a body for covering the open mouth from the outside and an insertion part provided at one end of the body and suitable for being inserted into the open mouth;

[0023] The insertion part is suitable for sealing cooperation with the open mouth.

[0024] In the optional implementation of the utility model, the gas washing bottle is made of transparent glass material; and

[0025] The bottle cap is made of elastic material.

[0026] In the optional implementation of the utility model, the membrane fixing bottle is suitable for entering and exiting the gas washing bottle from the open mouth; and

[0027] The inflation pipe penetrates the bottle cap, and the inflation pipe and the bottle cap are in sealing cooperation.

[0028] By adopting the above technical scheme, the utility model has the following beneficial effects: the gas permeable membrane detection device of the utility model first realizes rapid fixation of the gas permeable membrane through the design of the membrane fixing bottle cooperating with the opening, so that the detection efficiency of the gas permeable membrane can be improved, and under this structure, water passing into the gas washing bottle can realize detection of the water pressure resistance of the gas permeable membrane by observing the cooperation state of the gas permeable membrane and the membrane fixing bottle; secondly, the U-shaped tube cooperating with the gas washing bottle can realize the gas permeation amount of the gas permeable membrane under different pressure differences. Therefore, for the detection device of the utility model, only one device can meet the detection requirements of the gas permeation amount and the water pressure resistance of the gas permeable membrane. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the gas permeable membrane detection device of the utility model;

[0030] Figure 2 Fig. 2 is a schematic diagram of the structure of the U-shaped tube of the gas permeable membrane detection device of the utility model;

[0031] Figure 3 Fig. 3 is a schematic diagram of the structure of the water washing bottle of the gas permeable membrane detection device of the utility model;

[0032] Figure 4 Fig. 4 is a schematic diagram of the structure of the membrane fixing bottle of the gas permeable membrane detection device of the utility model; Figure 3 Fig. 5 is a sectional view of A of Fig. 4.

[0033] In the figure: the gas washing bottle 1, the membrane fixing bottle 2, the opening 21, the gas permeable membrane 3, the containing cavity 4, the gas outlet pipe 5, the flow meter 6, the first control valve 7, the body 8, the insertion part 9, the inflation pipe 10, the gas inlet pipe 11, the gas pump 12, the U-shaped pipe 13, the left vertical pipe 131, the right vertical pipe 132, the cap 133, the liquid outlet 134, the positive scale 135, the negative scale 136, the 0 point scale 137, the branch pipe 14, the second control valve 15. DETAILED DESCRIPTION

[0034] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining the drawings, the utility model is further explained in detail.

[0035] Please refer to Figures 1 to 4 As shown in the figure, the embodiment provides a kind of gas permeable membrane detection device, including: gas washing bottle 1, membrane fixing bottle 2 in gas washing bottle 1, and the gas inlet assembly used in cooperation with membrane fixing bottle 2.

[0036] Next, roughly, gas washing bottle 1, with hollow containing cavity 4;Gas washing bottle 1 is connected with the gas outlet pipe 5 that communicates with containing cavity 4, and gas outlet pipe 5 is configured with flow meter 6.To control the on-off of gas outlet pipe 5, first control valve 7 is also configured on gas outlet pipe 5.

[0037] More specifically, the top of gas washing bottle 1 is formed with open mouth, and the bottom of gas washing bottle 1 is detachably connected with bottle cap suitable for covering open mouth;And gas outlet pipe 5 is connected with bottle cap.

[0038] Furthermore, an alternative embodiment is described, bottle cap includes the body 8 for covering open mouth from outside and the insertion part 9 suitable for being inserted into open mouth in the side end of body 8;Insertion part 9 is suitable for sealing cooperation with open mouth.

[0039] For this, in an alternative embodiment, gas washing bottle 1 is made of transparent glass material;The bottle cap is made of elastic material, which can be, for example, but not limited to, rubber or silicone, and the sealing cooperation between the insertion part 9 of the bottle cap and the open mouth of the containing cavity 4 is realized by interference fit.Based on this, regarding the cooperation between gas outlet pipe 5 and bottle cap, the gas outlet pipe 5 here can be made of glass or plastic material, and the pipe hole for cooperating with gas outlet pipe 5 is through between the body 8 and insertion part 9 of bottle cap, so that the sealing cooperation between gas outlet pipe 5 and bottle cap can also be realized by interference fit with pipe hole.

[0040] Next, it is to be explained that, about the membrane fixing bottle 2, it is arranged in the washing bottle 1, and the side wall of the membrane fixing bottle 2 has a hollow opening 21 which is suitable to be covered by the breathable membrane 3; the side of the hollow opening 21 which is opposite to the breathable membrane 3 is also connected with the air charging pipe 10; the air inlet pipe 11 of the air charging pipe 10 is extended to the outside of the washing bottle 1 through the washing bottle 1.

[0041] More specifically, taking an optional implementation as an example, the outer wall surface of the side end of the membrane fixing bottle 2 which is shaped with the hollow opening 21 is a smooth surface, which is mainly designed to make the breathable membrane 3 better adhere to the outer wall surface of the membrane fixing bottle 2 to form the covering of the hollow opening 21. Correspondingly, the membrane fixing bottle 2 can be made of glass material, that is, the implementation realizes the fixation of the breathable membrane 3 by utilizing the characteristic that the breathable membrane 3 is easy to adhere to the glass material. Of course, in order to ensure the firmness and the sealing performance of the cooperation structure formed between the breathable membrane 3 and the membrane fixing bottle 2, the breathable membrane 3 and the outer wall surface of the membrane fixing bottle 2 can also be adhered by sealing glue.

[0042] It should be noted that the membrane fixing bottle 2 is suitable to enter and exit the washing bottle 1 from the open mouth; and the air charging pipe 10 penetrates the bottle cap, and the air charging pipe 10 is sealingly cooperated with the bottle cap. The air charging pipe 10 can be made of glass or plastic material, and a pipe hole for cooperating with the air charging pipe 10 is penetrated between the body 8 and the insertion part 9 of the bottle cap, so that the air charging pipe 10 can also realize the sealing cooperation between the air charging pipe 10 and the bottle cap by interference fit with the pipe hole.

[0043] For this purpose, taking an optional implementation as an example, the membrane fixing bottle 2 is a cuboid structure, for which the shape of the hollow opening 21 is rectangular, and the air outlet pipe 5 of the air charging pipe 10 is suitable to cover the hollow opening 21.

[0044] Next, it is to be explained that the air inlet assembly includes the air inlet pipe 11 connected with the air inlet pipe 11 of the air charging pipe 10, the air pump 12 connected with the air inlet pipe 11, and the U-shaped pipe 13 connected with the air inlet pipe 11 and located between the air pump 12 and the air charging pipe 10. The air inlet pipe 11 is connected with the U-shaped pipe 13 through a branch pipe 14, and the second control valve 15 for controlling the on-off between the air inlet pipe 11 and the U-shaped pipe 13 is arranged on the branch pipe 14.

[0045] In order to realize the breathable amount of the breathable membrane 3 under different pressure differences, the U-shaped pipe adopted by the embodiment includes the left vertical pipe 131 and the right vertical pipe 132 which are connected through penetration; and the left vertical pipe 131 is higher than the right vertical pipe 132; the right vertical pipe 132 is connected with the air inlet pipe 11.

[0046] At the top of the left vertical tube 131, an inlet for liquid can be designed, which is provided with a detachable cap 133. In an alternative embodiment, a liquid outlet 134 with a valve can be provided at the bottom of the U-shaped tube 13 for the convenience of adjusting the water level in the U-shaped tube.

[0047] More specifically, the left vertical tube 131 is provided with a positive scale 135, and the right vertical tube 132 is provided with a negative scale 136; and the zero points of the positive scale 135 and the negative scale 136 are aligned. More specifically, in combination with the drawings, the directions of the scales of the two sides are opposite, the scale on the right vertical tube 132 is from 0 point downwards, and the scale on the left vertical tube 131 is from 0 point upwards. The initial water level is aligned with the 0 point scale 137, the height difference of the scales of the two sides is symmetrical (or approximately symmetrical), and the maximum scale difference between the two sides is greater than or equal to the maximum pressure to be tested (the scale difference in the figure is 30 cm, and the maximum measurable pressure is 3 kPa. If a larger pressure is to be measured, the U-shaped tube should be longer). During testing, water is placed in the U-shaped tube 13, and the water level is aligned with the 0 scale position. When the "to-be-tested gas permeable membrane 3" is tightly attached to the outer wall of the bottle 2 and covers the opening 21, a stable amount of air flow is introduced into the air inlet tube 11 through the air pump 12, the air flow is adjusted and fixed, in this state, the water level difference between the two ends of the U-shaped tube will have a height difference, after the water level is stable, the water level difference h is read, and the atmospheric pressure calculation formula P = ρgh is used, where ρ is the density of water, g is the acceleration of gravity, and h is the depth difference of water between the left tube and the right tube of the U-shaped tube. Thus, the corresponding pressure difference can be calculated. Based on this, by adjusting the air flow introduced into the air inlet tube 11, the water level difference between the left tube and the right tube of the U-shaped tube is generated, thereby calculating the corresponding pressure difference, and the gas permeation amount of the gas permeable membrane 3 corresponding to the pressure difference is detected by the flow meter 6 of the air outlet tube 5.

[0048] In addition, when the water pressure resistance of the breathable film 3 needs to be tested, the second control valve 15 is closed, and the first control valve 7 on the air outlet pipe 5 is closed so that the air outlet pipe 5 cannot output air any more, then an appropriate amount of water is added into the film fixing bottle 2, and the specific amount of water is that the water level can completely cover the breathable film 3 attached to the film fixing bottle 2, in this case, the air pump 12 continuously inputs air flow with a certain air pressure range into the air inlet pipe 11, and a certain water pressure is formed in the film fixing bottle 2, and the attachment state of the breathable film 3 attached to the film fixing bottle 2 is observed from the outside of the washing bottle 1, when the breathable film 3 is not damaged or does not leak water for a period of time (the breathable film 3 will be broken after a period of time of air input, or the water in the film fixing bottle 2 will flow to the washing bottle 1 through the breathable film 3), it indicates that the product meets the IPX level waterproof, so that the water pressure resistance of the breathable film 3 can be tested by the film fixing bottle 2 cooperating with the air inlet pipe 11 and the air pump 12.

[0049] The above specific embodiments further illustrate the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above are only specific embodiments of the utility model and are not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0050] In the description of the utility model, it should be understood that the terms indicating the position or relationship are based on the position or relationship shown in the drawings, and are only used to facilitate the description of the utility model and simplify the description, and cannot be understood as a limitation on the utility model.

[0051] In the utility model, unless otherwise specified and limited, the terms "installation", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0052] In the utility model, unless another definite provision and limitation, first feature is on or under second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but are in contact through other features between them. Moreover, first feature is on, above and on top of second feature includes that first feature is directly above and obliquely above second feature, or only indicates that the horizontal height of first feature is higher than second feature. First feature is under, below and under second feature includes that first feature is directly below and obliquely below second feature, or only indicates that the horizontal height of first feature is less than second feature.

Claims

1. A breathable film detection apparatus, characterized by, The application relates to a gas washing bottle, a membrane fixing bottle, a gas inlet assembly and a bottle cap. The gas washing bottle has a hollow containing cavity; the gas washing bottle is connected with a gas outlet pipe in communication with the containing cavity, and the gas outlet pipe is provided with a flow meter; The membrane fixing bottle is arranged in the gas washing bottle, and a side wall of the membrane fixing bottle is provided with a hollow opening suitable for being covered by a gas permeable membrane; The side of the opening away from the gas permeable membrane is further connected with a gas filling pipe; an air inlet pipe of the gas filling pipe extends out of the gas washing bottle through the gas washing bottle; The gas inlet assembly comprises an air inlet pipe connected with the air inlet pipe of the gas filling pipe, an air pump connected with the air inlet pipe, and a U-shaped pipe in communication with the air inlet pipe and located between the air pump and the gas filling pipe. An outer wall surface of a side end of the membrane fixing bottle, where the opening is formed, is a smooth surface.

2. The breathable film detection apparatus of claim 1, wherein, The membrane fixing bottle has a cuboid structure, and the opening is formed on one side end surface of the cuboid structure.

3. The breathable film detection apparatus of claim 1 or 2, wherein, The opening has a rectangular shape, and an air outlet pipe of the gas filling pipe is suitable for covering the opening.

4. The breathable film detection apparatus of claim 3, wherein, The U-shaped pipe comprises a left vertical pipe and a right vertical pipe connected through the U-shaped pipe; and 5. The breathable film detection apparatus of claim 1, wherein The left vertical pipe is higher than the right vertical pipe; The right vertical pipe is in communication with the air inlet pipe. A positive scale is arranged on the left vertical pipe, and a negative scale is arranged on the right vertical pipe; and 6. The breathable film detection apparatus of claim 5, wherein, The zero point of the positive scale and the zero point of the negative scale are arranged in alignment. The top of the gas washing bottle is formed with an open mouth, and the bottom of the gas washing bottle is detachably connected with a bottle cap suitable for covering the open mouth; and 7. The breathable film detection apparatus of claim 1, wherein The gas outlet pipe is connected with the bottle cap. The bottle cap comprises a body for covering the open mouth from the outside and an insertion part arranged on one side end of the body and suitable for being inserted into the open mouth; 8. The breathable film detection apparatus of claim 7, wherein, The insertion part is suitable for being in sealing cooperation with the open mouth. The gas washing bottle is made of transparent glass; and 9. The breathable film detection apparatus of claim 8, wherein, The bottle cap is made of elastic material. The membrane fixing bottle is suitable for being taken in and out of the gas washing bottle through the open mouth; and 10. The breathable film detection apparatus of any of claims 7-9, wherein, The gas filling pipe penetrates through the bottle cap, and the gas filling pipe is in sealing cooperation with the bottle cap. ​

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