Moisture permeability measuring instrument with potassium acetate testing method

Abstract

The utility model discloses a moisture permeability measuring instrument with a potassium acetate test method, which comprises an overflow component, the overflow component comprises an overflow outer pipe and an overflow inner pipe, the overflow outer pipe is fixedly arranged on the bottom wall of a test water tank, the overflow inner pipe is arranged in an inner cavity of the overflow outer pipe, the overflow outer pipe and the overflow inner pipe are in sliding connection along the vertical direction, and the overflow outer pipe is connected with the overflow inner pipe. The driving mechanism is used for driving the overflow inner pipe to be switched between a first state and a second state, a plurality of first membrane breaking grooves are formed in the side wall of the top of the overflow outer pipe, a membrane breaking plate is arranged at the top of the overflow inner pipe, and in the second state, the overflow inner pipe rises, and the membrane breaking plate is aligned with the first membrane breaking grooves to form second membrane breaking grooves; the height of the overflow inner pipe is adjusted through the driving mechanism, and then the height of the overflow opening of the overflow assembly is adjusted, so that the overflow assembly can be suitable for tests for measuring the moisture permeability of fabrics with two specifications of 5 mm and 10 mm through a potassium acetate method, and measurement of the moisture permeability of the fabrics is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of fabric moisture permeability measurement, in particular to a moisture permeability measuring instrument with a potassium acetate testing method. Background Art

[0002] The moisture permeability measuring instrument is mainly used to test the moisture permeability of medical protective clothing, light industrial materials, textiles, sportswear and other materials to evaluate their moisture permeability performance.

[0003] Among them, the potassium acetate method is to inject a saturated potassium acetate solution into the test cup 5, and then use a standard test membrane to block the mouth of the test cup, such as Figure 1 As shown, the fabric 4 to be tested is tied to one end of the supporting cylinder 3, and then the test cup 5 is inverted on the fabric 4 to be tested, and then the fabric 4 to be tested and the supporting cylinder 3 are inverted in the test water tank. The total mass of the test cup 5 before the test and the total mass of the test cup 5 after 15 minutes are weighed, and then the amount of water that penetrates the fabric 4 to be tested can be accurately measured, so as to calculate the moisture permeability of the fabric 4.

[0004] According to industry standards, when the fabric 4 is turned upside down inside the test water tank, the distance between the fabric 4 and the horizontal plane should be one of 5 mm (ISO15496) or 10 mm (JISL1099). Under normal circumstances, an overflow assembly 2 is provided in the test water tank, wherein the overflow port height of the overflow assembly is not adjustable, and the mounting position of the supporting cylinder is fixed and cannot be raised at will. Therefore, conventional equipment cannot change the distance between the fabric 4 and the horizontal plane, and thus cannot adapt to both 5 mm and 10 mm environments at the same time.

[0005] Therefore, how to design a water vapor permeability measuring instrument that can adapt to two measurement environments at the same time has become a technical problem that needs to be solved urgently by people in this field. Utility Model Content

[0006] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a water vapor permeability measuring instrument with a potassium acetate testing method to solve the problem that conventional equipment cannot adapt to two measurement environments at the same time.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A moisture permeability measuring instrument with a potassium acetate test method, comprising a test water tank, a water inlet pipe installed on the test water tank, and an overflow assembly communicating with the outside on the bottom wall of the test water tank. The overflow assembly includes an overflow outer pipe and an overflow inner pipe. The overflow outer pipe is fixedly installed on the bottom wall of the test water tank, and the overflow inner pipe is installed in the inner cavity of the overflow outer pipe. The overflow outer pipe and the overflow inner pipe are slidably connected vertically. It also includes a driving mechanism for driving the overflow inner pipe to switch between a first state and a second state. A plurality of first film-breaking grooves are provided on the top side wall of the overflow outer pipe, and a film-breaking plate is provided on the top of the overflow inner pipe. In the second state, the overflow inner pipe rises, and the film-breaking plate is aligned with the first film-breaking grooves to form a second film-breaking groove.

[0009] Further, the first film-breaking grooves and the second film-breaking grooves are in an inverted triangular shape, with one tip pointing vertically downward.

[0010] Further, an overflow conical surface is provided on the top side wall of the overflow outer pipe, and the extension lines of the overflow conical surface intersect at the axis position of the top of the overflow assembly. The first film-breaking grooves are provided on the overflow conical surface.

[0011] Further, a horizontally arranged supporting ring seat is provided on the inner wall of the overflow outer pipe. A sealing ring sleeve and a limiting retaining ring are provided on the outer wall of the overflow inner pipe. The limiting retaining ring is located above the sealing ring sleeve. When the overflow inner pipe is installed in the overflow outer pipe, the supporting ring seat is located between the limiting retaining ring and the sealing ring sleeve. In the first state, the bottom wall of the limiting retaining ring abuts against the top wall of the supporting ring seat, and the film-breaking plate is located below the first film-breaking grooves. In the second state, the top wall of the sealing ring sleeve abuts against the bottom wall of the supporting ring seat.

[0012] Further, a first cover plate is provided on the test water tank. The driving mechanism includes an electric push rod. A connecting seat is fixedly provided on the inner wall of the overflow inner pipe. The electric push rod is installed on the first cover plate, and the telescopic rod of the electric push rod is fixedly connected to the connecting seat.

[0013] Further, a plugging groove arranged along the axial direction of the overflow outer pipe is provided on the inner wall of the overflow outer pipe. A plugging rib arranged along the axial direction of the overflow inner pipe is provided on the peripheral wall of the limiting retaining ring. The plugging rib is inserted into the plugging groove and is slidably connected to the plugging groove.

[0014] Further, a second cover plate is provided on the test water tank. A plurality of mounting holes are provided on the second cover plate, including a supporting cylinder body inserted into the test water tank through the mounting holes. The fabric to be tested is fixedly installed at the bottom of the supporting cylinder body through a binding band and seals the bottom opening of the supporting cylinder body. A plurality of supporting seats distributed along the circumferential direction of the supporting cylinder body are fixedly provided on the peripheral wall of the supporting cylinder body. When the supporting cylinder body is installed, the bottom wall of the supporting seat abuts against the top wall of the second cover plate. It also includes a test cup filled with potassium acetate. The cup mouth of the test cup is sealed with a standard test film, and the test cup is buckled on the fabric to be tested.

[0015] Further, a positioning seat is provided in the test water tank, and the second cover plate is fixed to the positioning seat by positioning bolts.

[0016] Further, a plurality of vertically extending supporting rods are fixedly provided on the second cover plate, and the supporting rods correspond to the supporting seats on the supporting cylinder one by one, and the top wall of the supporting rod abuts against the bottom wall of the supporting seat.

[0017] Further, a vertically downward extending insertion pipe is fixedly provided on the bottom wall of the supporting seat, and a plugging rod inserted into the insertion pipe is fixedly provided on the top wall of the supporting rod. The length of the plugging rod is less than the length of the insertion pipe, and the top wall of the supporting rod abuts against the bottom end wall of the insertion pipe.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: By using the driving mechanism to change the position of the overflow inner pipe, and then adjusting the height of the overflow port of the overflow assembly, the overflow assembly can be made to be applicable to the tests of measuring the moisture permeability of fabrics by the potassium acetate method with two specifications of 5 mm and 10 mm, expanding the adaptation range of the moisture permeability tester. The control of the liquid level of the test water tank can be realized without replacing the overflow assembly, which is convenient for measuring the moisture permeability of fabrics.

[0019] Among them, the first film-breaking groove on the overflow outer pipe can break the water film on the liquid level surface, reduce the problem that the existence of the water film causes the accuracy of the placement depth of the fabric to be not high enough, and improve the accuracy of the moisture permeability of the fabric. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the prior art;

[0021] Figure 2 is a schematic structural diagram of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the test water tank;

[0023] Figure 4 is an unfolded schematic diagram of the test water tank;

[0024] Figure 5 is an unfolded schematic diagram of the test cup;

[0025] Figure 6 is a schematic structural diagram of the overflow assembly;

[0026] Figure 7 is a sectional view of the first state of the overflow assembly;

[0027] Figure 8 is a sectional view of the second state of the overflow assembly;

[0028] Figure 9 is a schematic structural diagram of the overflow outer pipe;

[0029] Figure 10 It is a schematic structural diagram of the overflow inner pipe;

[0030] Figure 11 It is an installation schematic diagram of the supporting cylinder body.

[0031] In the figure: 10, the machine body; 100, the test chamber; 1, the test water tank; 101, the first cover plate; 102, the second cover plate; 1021, the installation hole; 1022, the supporting strut; 10221, the inserting rod; 103, the water inlet pipe; 104, the positioning seat; 105, the positioning bolt; 2, the overflow assembly; 21, the overflow outer pipe; 211, the overflow conical surface; 212, the first film-breaking groove; 213, the inserting groove; 214, the supporting ring seat; 22, the overflow inner pipe; 221, the sealing ring sleeve; 222, the limiting retaining ring; 2221, the inserting rib; 223, the connecting seat; 224, the film-breaking plate; 23, the second film-breaking groove; 3, the supporting cylinder body; 31, the supporting seat; 311, the inserting pipe; 4, the fabric; 41, the binding band; 5, the test cup; 51, the standard test film; 6, the electric push rod; 71, the first overflow surface; 72, the second overflow surface. Specific embodiments

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] This embodiment provides a moisture permeability measuring instrument with a potassium acetate test method, which is mainly used for testing the moisture permeability of fabrics by the potassium acetate method and can adapt to the measurement environments of 5 mm and 10 mm at the same time.

[0034] In order to provide a stable measurement environment for measuring the moisture permeability of fabrics by the potassium acetate method, in this embodiment, as Figure 2 shown, it includes the machine body 10. Among them, a test chamber 100 is provided inside the machine body 10, and the test water tank 1 is placed in the test chamber 100. By using a humidity controller and a temperature controller, the humidity and temperature of the test chamber 100 are maintained within a suitable range to provide a stable measurement environment for measuring the moisture permeability of fabrics by the potassium acetate method.

[0035] In order to accurately control the height of the water level, in this embodiment, as Figure 3 and Figure 4As shown in the figure, a water inlet pipe 103 is installed in the test water tank 1, and an overflow assembly 2 extending vertically downward is fixedly installed on the bottom wall of the test water tank 1. Among them, water is supplied to the test water tank by the water inlet pipe 103. When the water level in the test water tank 1 reaches the overflow port position of the overflow assembly 2, the excess water flows out through the overflow assembly 2, so as to ensure that the water surface in the test water tank 1 is maintained at a stable height.

[0036] In order to facilitate the installation of the support cylinder body 3 with the fabric 4 tied thereto and the test cup 5 being inverted below the liquid level of the test water tank 1, in this embodiment, as Figure 4 shown, a second cover plate 102 is provided on the top wall of the test water tank 1. Among them, the support cylinder body 3 is installed on the second cover plate 102, and then the fabric 4 is placed below the liquid level of the test water tank 1.

[0037] Specifically, the test cup 5 is filled with a saturated potassium acetate solution, and then the cup mouth of the test cup 5 is sealed with a standard test film 51.

[0038] In order to fix the second cover plate 102, in this embodiment, a vertically arranged positioning seat 104 is fixedly provided on the inner wall of the test water tank 1. After the second cover plate 102 is attached to the top wall of the test water tank 1, the second cover plate 102 is fixedly installed on the positioning seat 104 by a positioning bolt 105, thereby preventing the second cover plate 102 from moving during the test and improving the stability of the support cylinder body 3 at the same time.

[0039] In order to install the fabric 4 to be tested, in this embodiment, as Figure 5 shown, the fabric 4 to be tested is sleeved on one side port of the support cylinder body 3, and then the fabric 4 is fixed to the side wall of the support cylinder body 3 by a binding band 41, thereby binding the fabric 4 to the support cylinder body 3.

[0040] Specifically, as Figure 3 and Figure 4 shown, a plurality of vertically penetrating mounting holes 1021 are provided on the second cover plate 102. Among them, the diameter of the mounting holes 1021 is larger than the diameter of the support cylinder body 3, so that the support cylinder body 3 passes through the mounting holes 1021 and extends below the liquid level of the test water tank 1.

[0041] In order to be able to install the support cylinder body 3 on the second cover plate 102, under normal circumstances, as Figure 5 shown, a plurality of support seats 31 extending radially outward along the support cylinder body 3 are provided on the side wall of the support cylinder body 3. When the end of the support cylinder body 3 tied with the fabric 4 passes through the mounting holes 1021 and extends downward, at this time, the bottom wall of the support seat 31 abuts against the top wall of the second cover plate 102, so as to be able to limit the further downward movement of the support cylinder body 3, and further make the distance between the fabric and the bottom wall of the test water tank 1 a fixed value.

[0042] Since the fabric 4 is tied to the outer side wall of the supporting cylinder body 3, when the fabric is too large, when the supporting cylinder body 3 is placed on the second cover plate 102, the fabric 4 will be located between the bottom wall of the supporting seat 31 and the top wall of the second cover plate 102. At this time, the folds of the fabric 4 and the thickness of the fabric 4 will affect the value of the distance between the bottom wall of the fabric 4 and the bottom wall of the test water tank 1. Under normal circumstances, the height of the overflow port of the overflow assembly 2 is also a fixed value from the bottom wall of the test water tank 1. When the installation of the fabric 4 does not conform to the specification, the distance between the bottom wall of the fabric 4 and the liquid level in the test water tank 1 will also change, resulting in inaccurate measurement of the moisture permeability of the fabric 4 and affecting the measurement accuracy.

[0043] Therefore, in this embodiment, as Figure 4 and Figure 11 shown, a plurality of vertically upwardly extending supporting struts 1022 are fixedly provided on the top wall of the second cover plate 102. It should be noted here that three groups of supporting seats 31 are evenly distributed along the circumferential direction on the side wall of each supporting cylinder body 3, and the supporting struts 1022 provided circumferentially on each mounting hole 1021 are aligned with the supporting seats 31 one by one. When the supporting cylinder body 3 is installed, the top wall of the supporting strut 1022 abuts against the bottom wall of the supporting seat 31, leaving a gap between the supporting seat 31 and the top wall of the second cover plate 102, so as to avoid the influence of the presence of the fabric 4 on the installation accuracy of the supporting cylinder body 3 during the installation process of the supporting cylinder body 3.

[0044] In order to improve the installation stability of the supporting cylinder body 3, in this embodiment, as Figure 4 、 Figure 5 and Figure 11 shown, a vertically downwardly extending insertion pipe 311 is fixedly provided on the bottom wall of the supporting seat 31, and a vertically upwardly extending insertion rod 10221 is fixedly provided on the top wall of the supporting strut 1022. When the supporting cylinder body 3 is installed, the insertion rod 10221 is inserted into the inner cavity of the insertion pipe 311, and the top wall of the supporting strut 1022 abuts against the bottom wall of the insertion pipe 311.

[0045] It should be noted here that the length of the insertion rod 10221 is less than the length of the insertion pipe 311.

[0046] With the above settings, after the supporting cylinder body 3 is placed on the supporting rod 1022, since the inserting rod 10221 is inserted into the inner cavity of the inserting pipe 311, the supporting cylinder body 3 can be restricted from moving radially, improving the stability of the supporting cylinder body 3 after installation. Since the inserting pipe 311 is tubular, stains are likely to be generated inside the inserting pipe 311 after long-term use. When the inserting rod 10221 is directly inserted into the inserting pipe 311, the presence of stains will affect the height of the supporting cylinder body 3 during installation, thus affecting the accuracy of the moisture permeability measurement of the fabric 4. Since the length of the inserting pipe 311 is greater than the length of the inserting rod 10221, there is a gap for stains to remain between the top wall of the inserting rod 10221 and the inserting pipe 311, which can extend the service life of the supporting cylinder body 3.

[0047] It is worth noting here that the accuracy of the supporting cylinder body 3 is mainly related to the flatness between the bottom wall of the inserting pipe 311 and the top wall of the supporting rod 1022. When there are stains on the bottom wall of the inserting pipe 311 or the top wall of the supporting rod 1022, compared with the stains in the inner cavity of the inserting pipe 311 affecting the installation accuracy of the supporting cylinder body 3, the stains on the bottom wall of the inserting pipe 311 and the top wall of the supporting rod 1022 are easier to clean.

[0048] When the supporting cylinder body 3 is installed on the supporting rod 1022 of the second cover plate 102, the distance between the bottom wall of the fabric 4 and the bottom wall of the test water tank 1 is a fixed value. In order to be applicable to the potassium acetate method for measuring the moisture permeability of fabrics with two specifications of 5 mm and 10 mm, in this embodiment, as Figure 3 and Figure 6 shown, the overflow assembly 2 includes an overflow outer pipe 21 and an overflow inner pipe 22. The overflow outer pipe 21 is fixedly installed at the bottom wall of the test water tank 1 and is communicated with the bottom of the test water tank 1 to facilitate the control of the liquid level of the test water tank 1. The overflow inner pipe 22 is installed in the inner cavity of the overflow outer pipe 21. The outer wall of the overflow inner pipe 22 is slidably connected to the inner wall of the overflow outer pipe 21 along the axial direction of the overflow outer pipe 21. It also includes an electric push rod 6 for driving the overflow outer pipe 21 to rise and fall.

[0049] Specifically, as Figure 8 shown, when the overflow inner pipe 22 is completely received into the inner cavity of the overflow outer pipe 21, when the water level in the test water tank 1 reaches the overflow port position of the overflow outer pipe 21, the water will flow into the inner cavity of the overflow outer pipe 21, and the excess water conveyed by the water inlet pipe 103 will be discharged outward to maintain the stability of the liquid level height of the test water tank 1.

[0050] It is worth noting here that the liquid level corresponding to the overflow port of the overflow outer pipe 21 is the first overflow surface 71. Among them, the first overflow surface 71 is located above the fabric 4, and the distance between the first overflow surface 71 and the fabric 4 is 5 mm, which can be applicable to one of the specifications of the potassium acetate method test.

[0051] When the water in the test water tank 1 is flush with the overflow port of the overflow outer pipe 21, due to the surface tension of the water, a water film will form on the water surface. The existence of the water film will cause the liquid level in the test water tank 1 to be higher than the overflow port of the overflow outer pipe 21. To solve the influence of the water film on the accuracy of the distance between the liquid level in the test water tank and the fabric 4, in this embodiment, as Figure 6 、 Figure 7 and Figure 9 shown, the outer wall of the top of the overflow outer pipe 21 is a positive overflow conical surface 211. Among them, the diameter of the upper end of the overflow conical surface 211 is small, and the diameter of the lower end is large. A first film-breaking groove 212 communicating with the inner cavity of the overflow outer pipe 21 is provided on the overflow conical surface 211. Specifically, the longitudinal section of the first film-breaking groove 212 is an inverted triangle, where the tip of the triangle is vertically downward. At this time, the horizontal plane where the lowest point of the first film-breaking groove 212 is located is the first overflow surface 71.

[0052] Through the above settings, the water inlet pipe 103 injects water into the test water tank 1. As the liquid level rises, the liquid level gradually climbs to the overflow conical surface 211 and then reaches the bottom tip position of the first film-breaking groove 212. At this time, the tip of the first film-breaking groove 212 is used to break the water film on the liquid level surface, so that the water flows into the inner cavity of the overflow outer pipe 21 through the first film-breaking groove 212, solving the problem that the water film on the liquid level surface affects the accuracy of the depth of the fabric 4 placed below the liquid level.

[0053] It should be noted here that four groups of the first film-breaking grooves 212 are provided and are evenly distributed along the circumferential direction of the overflow outer pipe 21.

[0054] The first film-breaking groove 212 is used to control the liquid level in the test water tank 1 to cope with the 5mm specification potassium acetate method test.

[0055] In order to be able to cope with the 10mm specification potassium acetate method test, in this embodiment, as Figure 6 、 Figure 7 and Figure 10 shown, four film-breaking plates 224 adapted to the first film-breaking grooves 212 are provided at the top of the overflow inner pipe 22. Among them, the longitudinal section of the film-breaking plate 224 is a positive triangle, and one tip of the film-breaking plate 224 is vertically upward. When a 10mm specification test is required, the electric push rod 6 is used to lift the overflow inner pipe 22 upward, so that the film-breaking plate 224 is aligned with the first film-breaking groove 212, as Figure 7As shown, at this time, the film-breaking plate 224 cooperates with the first film-breaking groove 212 to form two second film-breaking grooves 23. Among them, the second film-breaking groove 23 is also triangular with the tip downward. The horizontal plane where the lowest point of the second film-breaking groove 23 is located is the second overflow surface 72. Among them, the second overflow surface 72 is located above the first overflow surface 71. The vertical distance between the first overflow surface 71 and the second overflow surface 72 is 5 mm. As the overflow inner pipe 22 rises, at this time, the liquid level in the test water tank 1 continues to rise to the position of the second overflow surface 72, and then flows through the second film-breaking groove 23 into the inner cavity of the overflow inner pipe 22, so as to realize the discharge of excess water.

[0056] Specifically, in order to realize the lifting and lowering of the overflow inner pipe 22, in this embodiment, as Figure 4 and Figure 7 shown, the top wall of the test water tank 1 is provided with a first cover plate 101. Among them, the electric push rod 6 is fixedly installed on the first cover plate 101. The telescopic rod of the electric push rod 6 extends vertically downward into the test water tank 1. A connecting seat 223 is fixedly arranged in the inner wall of the overflow inner pipe 22. Among them, the connecting seat 223 is fixedly connected with the telescopic rod of the electric push rod 6.

[0057] Through the above settings, by extending or retracting the telescopic rod of the electric push rod 6, the position of the overflow inner pipe 22 can be changed, so that it can be switched between 5 mm and 10 mm specifications.

[0058] In order to be able to control the lifting position of the overflow inner pipe 22, in this embodiment, as Figure 7 and Figure 8 shown, an annular supporting ring seat 214 is fixedly arranged in the inner cavity of the overflow outer pipe 21. Sealing ring sleeves 221 and limiting retaining rings 222 extending radially outward along the overflow inner pipe 22 are respectively arranged on the outer wall of the overflow inner pipe 22. Among them, the sealing ring sleeve 221 is arranged on the bottom side wall of the overflow inner pipe 22, and the sealing ring sleeve 221 is installed on the top side wall of the overflow inner pipe 22. When the overflow inner pipe 22 is installed in the inner cavity of the overflow outer pipe 21, the supporting ring seat 214 is located between the sealing ring sleeve 221 and the limiting retaining ring 222, and the outer walls of the sealing ring sleeve 221 and the limiting retaining ring 222 are in contact with the inner wall of the overflow outer pipe 21.

[0059] It should be noted here that the sealing ring sleeve 221 is made of rubber material. When the overflow inner pipe 22 rises to the 10 mm test specification, as Figure 7As shown, at this time, the top wall of the sealing ring sleeve 221 abuts against the bottom wall of the supporting ring seat 214, thereby restricting the further upward movement of the overflow inner pipe 22. At the same time, the abutment between the sealing ring sleeve 221 and the supporting ring seat 214 can strengthen the encapsulation of the gap between the inner wall of the overflow outer pipe 21 and the outer wall of the overflow inner pipe 22, preventing the water in the test water tank 1 from discharging outward through the gap between the overflow outer pipe 21 and the overflow inner pipe 22; wherein, the horizontal plane where the bottom wall of the limit retaining ring 222 is located is lower than the first overflow surface 71, thereby preventing the water in the test water tank 1 from entering the gap between the overflow outer pipe 21 and the overflow inner pipe 22.

[0060] When the overflow inner pipe 22 is completely received into the inner cavity of the overflow outer pipe 21, as Figure 8 shown, at this time, the bottom wall of the limit retaining ring 222 abuts against the top wall of the supporting ring seat 214, restricting the further downward movement of the overflow inner pipe 22. At this time, the top tip of the membrane-breaking plate 224 is lower than the horizontal plane where the first overflow surface 71 is located.

[0061] When the electric push rod 6 drives the overflow inner pipe 22 to lift and lower, in order to prevent the overflow inner pipe 22 from rotating circumferentially relative to the overflow outer pipe 21, in this embodiment, as Figure 9 and Figure 10 shown, the inner wall of the overflow outer pipe 21 is provided with a plug-in groove 213 extending along the axial direction of the overflow outer pipe 21, and the outer wall of the limit retaining ring 222 is provided with a plug-in rib 2221 extending along the axial direction of the overflow inner pipe 22. When the overflow inner pipe 22 is installed in the overflow outer pipe 21, the plug-in rib 2221 is inserted into the plug-in groove 213, thereby being able to restrict the relative circumferential rotation between the overflow outer pipe 21 and the overflow inner pipe 22 and improving the stability of the lifting of the overflow inner pipe 22.

[0062] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.

Claims

1. A moisture permeability measuring instrument with a potassium acetate test method, comprising a test water tank (1), a water inlet pipe (103) installed on the test water tank (1), and an overflow assembly (2) communicating with the outside is provided on the bottom wall of the test water tank (1), characterized in that: The overflow assembly (2) includes an overflow outer pipe (21) and an overflow inner pipe (22). The overflow outer pipe (21) is fixedly installed on the bottom wall of the test water tank (1). The overflow inner pipe (22) is installed in the inner cavity of the overflow outer pipe (21). The overflow outer pipe (21) and the overflow inner pipe (22) are slidably connected vertically. It also includes a driving mechanism for driving the overflow inner pipe (22) to switch between a first state and a second state. A plurality of first film-breaking grooves (212) are provided on the top side wall of the overflow outer pipe (21). A film-breaking plate (224) is provided at the top of the overflow inner pipe (22). In the second state, the overflow inner pipe (22) rises, and the film-breaking plate (224) is aligned with the first film-breaking grooves (212) to form a second film-breaking groove (23).

2. The moisture permeability measuring instrument with a potassium acetate test method according to claim 1, characterized in that: The first film-breaking grooves (212) and the second film-breaking groove (23) are in an inverted triangle shape, with one tip pointing vertically downward.

3. The moisture permeability measuring instrument with a potassium acetate test method according to claim 1 or 2, characterized in that: An overflow conical surface (211) is provided on the top side wall of the overflow outer pipe (21). The extension lines of the overflow conical surface (211) intersect at the axial position of the top of the overflow assembly (2). The first film-breaking grooves (212) are provided on the overflow conical surface (211).

4. The moisture permeability measuring instrument with a potassium acetate test method according to claim 2, characterized in that: A horizontal supporting ring seat (214) is provided on the inner wall of the overflow outer pipe (21). A sealing ring sleeve (221) and a limiting retaining ring (222) are provided on the outer wall of the overflow inner pipe (22). The limiting retaining ring (222) is located above the sealing ring sleeve (221). When the overflow inner pipe (22) is installed in the overflow outer pipe (21), the supporting ring seat (214) is located between the limiting retaining ring (222) and the sealing ring sleeve (221). In the first state, the bottom wall of the limiting retaining ring (222) abuts against the top wall of the supporting ring seat (214), and the film-breaking plate (224) is located below the first film-breaking grooves (212). In the second state, the top wall of the sealing ring sleeve (221) abuts against the bottom wall of the supporting ring seat (214).

5. The moisture permeability measuring instrument with a potassium acetate test method according to claim 4, characterized in that: A first cover plate (101) is provided on the test water tank (1). The driving mechanism includes an electric push rod (6). A connecting seat (223) is fixedly provided on the inner wall of the overflow inner pipe (22). The electric push rod (6) is installed on the first cover plate (101), and the telescopic rod of the electric push rod (6) is fixedly connected to the connecting seat (223).

6. The moisture permeability measuring instrument with a potassium acetate test method according to claim 4, characterized in that: A plugging groove (213) is provided on the inner wall of the overflow outer pipe (21) along the axial direction of the overflow outer pipe (21). A plugging rib (2221) is provided on the peripheral wall of the limiting retaining ring (222) along the axial direction of the overflow inner pipe (22). The plugging rib (2221) is plugged into the plugging groove (213) and is slidably connected to the plugging groove (213).

7. The moisture permeability measuring instrument with a potassium acetate test method according to claim 1, characterized in that: A second cover plate (102) is provided on the test water tank (1). A plurality of mounting holes (1021) are provided on the second cover plate (102). A supporting cylinder body (3) is inserted into the test water tank (1) through the mounting holes (1021). The fabric (4) to be tested is fixedly installed at the bottom of the supporting cylinder body (3) through a binding band (41) and seals the bottom opening of the supporting cylinder body (3). A plurality of supporting seats (31) distributed along the circumferential direction of the supporting cylinder body (3) are fixedly provided on the circumferential wall of the supporting cylinder body (3). When the supporting cylinder body (3) is installed, the bottom wall of the supporting seat (31) abuts against the top wall of the second cover plate (102). It further includes a test cup (5) filled with potassium acetate. The cup mouth of the test cup (5) is sealed with a standard test film (51). The test cup (5) is buckled on the fabric (4) to be tested.

8. The moisture permeability measuring instrument with a potassium acetate test method according to claim 7, characterized in that: A positioning seat (104) is provided in the test water tank (1). The second cover plate (102) is fixed on the positioning seat (104) through a positioning bolt (105).

9. A moisture permeability measuring instrument with a potassium acetate test method according to claim 7, characterized in that: A plurality of vertically upward extending supporting struts (1022) are fixedly provided on the second cover plate (102). The supporting struts (1022) correspond to the supporting seats (31) on the supporting cylinder body (3) one by one. The top wall of the supporting strut (1022) abuts against the bottom wall of the supporting seat (31).

10. The moisture permeability measuring instrument with a potassium acetate test method according to claim 9, characterized in that: A vertically downward extending insertion pipe (311) is fixedly provided on the bottom wall of the supporting seat (31). A plugging rod (10221) inserted into the insertion pipe (311) is fixedly provided on the top wall of the supporting strut (1022). The length of the plugging rod (10221) is less than the length of the insertion pipe (311). The top wall of the supporting strut (1022) abuts against the bottom end wall of the insertion pipe (311).

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