Automatic weighing moisture permeability tester

Abstract

The utility model discloses an automatic weighing moisture permeation amount tester which comprises a box body, a turntable arranged in the box body, positioning holes arranged on the turntable and used for placing moisture permeation cups, an electronic balance arranged right below one of the positioning holes, and a partition plate dividing an inner cavity of the box body into a test cavity and an equipment cavity, the electronic balance is arranged in the equipment cavity, a jacking component used for jacking the electronic balance is arranged in the equipment cavity, a through hole is formed in the partition plate, a tray component is fixedly arranged on a bearing ring of the electronic balance, a flow guide cover arranged on the outer side of the bearing ring in a sleeving mode is arranged on a bearing disc of the electronic balance, and a waterproof outer edge used for enabling condensate water to slide to the flow guide cover is arranged on the tray component. The box body is provided with the exhaust fan communicated with the equipment cavity, moisture in the equipment cavity is pumped out through the exhaust fan, and the humidity in the equipment cavity is controlled, so that a stable operation environment is provided for the electronic balance, and the influence of the humidity on the electronic balance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water vapor permeability testing equipment, in particular to an automatic weighing water vapor permeability testing instrument. Background Art

[0002] The water vapor permeability coefficient refers to the amount of water vapor that passes through a sample of unit thickness and unit area in a specified temperature, relative humidity environment, unit time, and unit water vapor pressure difference.

[0003] The testing principle mainly includes a constant temperature and humidity chamber plus an electronic balance. A turntable and a driving mechanism for driving the turntable are arranged inside the constant temperature and humidity chamber. The turntable is provided with a number of circumferentially distributed moisture permeable cups. The electronic balance is installed on the lower side of the turntable. The moisture permeable cups on the turntable are placed one by one on the electronic balance for weighing, and then the amount of water vapor passing through the sample can be determined, thereby calculating the water vapor permeability coefficient.

[0004] Since the humidity inside the test chamber will be above 90% when the sample is tested, the humidity of the actual working environment of the electronic balance needs to be below 80%; during the weight measurement of the moisture permeability cup, the water vapor inside the constant temperature and humidity chamber will condense into water droplets and drip onto the electronic balance. The presence of water droplets can easily cause a short circuit in the internal circuit of the electronic balance, which can easily cause damage to the electronic balance. The cost of the electronic balance is relatively high, so when testing the moisture permeability of the sample, the electronic balance needs to be protected to reduce the risk of damage to the electronic balance.

[0005] Therefore, how to design a water vapor permeability tester that reduces the risk of damage to the electronic balance has become a technical problem that needs to be solved urgently by those skilled in the art. 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 an automatic weighing water vapor permeability tester to solve the problem that the electronic balance is easily damaged by internal short circuit caused by humidity and water droplets.

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

[0008] An automatic weighing moisture permeability tester, comprising a box body. Inside the box body, there is a turntable and a driving mechanism for driving the turntable to rotate. There are several circumferentially distributed positioning holes on the turntable for placing moisture permeability cups. Right below one of the positioning holes, there is an electronic balance. It includes a partition plate that divides the inner cavity of the box body into a test cavity and an equipment cavity. The test cavity is located above the equipment cavity. The turntable is arranged in the test cavity, and the electronic balance is arranged in the equipment cavity. Inside the equipment cavity, there is a lifting component for lifting the electronic balance. There is a through hole on the partition plate above the electronic balance. A tray component that extends through the through hole to the test cavity is fixedly arranged on the supporting ring of the electronic balance. A flow guide cover sleeved outside the supporting ring is arranged on the supporting tray of the electronic balance. A waterproof outer edge for sliding the condensed water to the flow guide cover is arranged on the tray component. An exhaust fan communicated with the equipment cavity is arranged on the box body.

[0009] Further, a limiting retaining ring extending upward fixedly is arranged on the top of the supporting tray of the electronic balance, and the flow guide cover is buckled outside the limiting retaining ring.

[0010] Further, the tray component includes a supporting column and a tray fixedly installed on the top of the supporting column. The tray is located in the test cavity. The side wall of the supporting column is slidably connected with the inner wall of the through hole on the partition plate. A plugging column extending downward is fixedly arranged on the bottom wall of the supporting column. There is a plugging interface on the supporting ring, and the plugging column is plugged into the plugging interface, and the peripheral wall of the plugging column abuts against the inner wall of the plugging interface.

[0011] Further, the diameter of the tray is larger than the diameter of the supporting column. The waterproof outer edge includes a first waterproof outer edge and a second waterproof outer edge. The first waterproof outer edge is arranged on the peripheral wall of the bottom of the supporting column and extends above the guiding part of the flow guide cover. The second waterproof outer edge is arranged at the outer edge of the bottom wall of the tray.

[0012] Further, it also includes a water blocking ring installed inside the through hole of the partition plate. The water blocking ring extends vertically upward, and the supporting column passes through the water blocking ring and extends upward.

[0013] Further, the lifting component includes a linear motor. The linear motor is fixedly installed on the bottom wall of the equipment cavity, and the output end of the linear motor is fixedly connected with the electronic balance.

[0014] Further, several linear bearings are fixedly arranged on the partition plate. A vertically arranged guiding column is slidably connected inside the linear bearings. The bottom of the guiding column is fixedly connected with the electronic balance.

[0015] Further, a supporting cylinder is arranged on the top of the linear motor. A spring is arranged inside the supporting cylinder. One end of the spring is fixedly connected with the bottom wall of the supporting cylinder, and the other end of the spring extends out of the supporting cylinder and is fixedly connected with the bottom wall of the electronic balance.

[0016] Further, the exhaust fan includes a first exhaust fan and a second exhaust fan. The first exhaust fan is used to extract the moisture in the equipment cavity, and the second exhaust fan is used to supplement the equipment cavity with dry external air.

[0017] Further, a circulation channel is provided inside the box body. The circulation channel includes an intake channel and an outlet channel that communicate with the test cavity. An exhaust window and an electric push rod for switching the exhaust window between a first state and a second state are hinged on the circulation channel. In the first state, the exhaust window closes the window connecting the circulation channel to the external environment. In the second state, the exhaust window opens the window connecting the circulation channel to the external environment.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: The inner cavity of the box body of the present utility model is divided into a test cavity and an equipment cavity, reducing the influence of the moisture inside the test cavity on the electronic balance;

[0019] When the moisture inside the test cavity enters the equipment cavity through the through holes on the partition board and causes the humidity in the equipment cavity to rise, the exhaust fan is used to extract the moisture inside the equipment cavity outwards to control the humidity inside the equipment cavity, thereby providing a stable working environment for the electronic balance and reducing the influence of the electronic balance by humidity;

[0020] When the moisture permeation cup in the positioning hole is directly above the tray component, the jacking component jacks up the electronic balance and the tray component synchronously, and the tray component is used to lift the moisture permeation cup and separate it from the turntable, realizing the measurement of the weight of the moisture permeation cup;

[0021] When condensed water forms inside the test cavity and slides down, it flows along the waterproof outer edge at the side wall to the diversion cover, preventing the condensed water from dripping into the inside of the electronic balance and reducing the risk of damage to the electronic balance caused by short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the present utility model from the first angle;

[0023] Figure 2 is a schematic diagram of the present utility model from the second angle;

[0024] Figure 3 is a cross-sectional view of the present utility model;

[0025] Figure 4 is a schematic diagram of the internal structure of the present utility model;

[0026] Figure 5 is a partial cross-sectional view of the present utility model;

[0027] Figure 6 is Figure 5 an enlarged schematic diagram of the structure of A in

[0028] Figure 7 For Figure 5 Schematic enlarged structure diagram of B in

[0029] Figure 8 Schematic structure diagram of the tray component;

[0030] Figure 9 Schematic unfolded diagram of the present utility model;

[0031] Figure 10 Schematic diagram of the exhaust window of the present utility model in the open state.

[0032] In the figure: 1, box body; 10, circulation channel; 101, intake channel; 102, outlet channel; 103, exhaust window; 104, partition board; 105, test chamber; 106, equipment chamber; 107, positioning plate; 108, turntable; 1081, positioning hole; 2, drive mechanism; 21, drive motor; 22, rotating shaft; 3, moisture permeation cup; 4, electronic balance; 41, supporting ring; 411, insertion interface; 42, limit retaining ring; 5, jacking component; 51, linear motor; 511, supporting cylinder; 6, tray component; 61, supporting column; 611, first waterproof outer edge; 612, insertion column; 62, tray; 621, second waterproof outer edge; 7, diversion cover; 8, water retaining ring; 9, spring; 100, guiding column; 1000, linear bearing; 1001, electric push rod; 1002, exhaust fan; 10021, first exhaust fan; 10022, second exhaust fan; 1003, bracket. Specific embodiments

[0033] The technical solutions in the embodiments of the present utility model will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0034] This embodiment provides an automatic weighing moisture permeation tester, which is mainly used to solve the problem that the humidity inside the box body is relatively high, which is likely to cause damage to the electronic balance.

[0035] As Figure 1 And Figure 2 shown, it includes a box body 1. Among them, a horizontally arranged partition board 104 is fixedly provided in the inner cavity of the box body 1. The partition board 104 divides the inner cavity of the box body 1 into a test chamber 105 located on the upper side and an equipment chamber 106 located on the lower side. A positioning plate 107 is fixedly provided inside the test chamber 105. As Figure 4As shown, a turntable 108 is rotatably connected to the positioning plate 107. Among them, a number of circumferentially evenly distributed positioning holes 1081 are provided on the turntable 108. A moisture permeable cup 3 for assembling a test sample is placed inside the positioning hole 1081. Among them, the bottom of the moisture permeable cup 3 extends downward through the positioning hole 1081. The box body 1 further includes a driving mechanism 2 for driving the turntable 108 to rotate, such as Figure 2 and Figure 3 As shown, an electronic balance 4 and a lifting component 5 for lifting the electronic balance 4 are provided inside the equipment cavity 106.

[0036] Through the above settings, the driving mechanism 2 is used to drive the turntable 108 to rotate, and then the position of the moisture permeable cup 3 on the turntable 108 is adjusted. When one of the moisture permeable cups 3 is directly above the electronic balance 4, the lifting component 5 is used to lift the electronic balance 4 upward, so that the moisture permeable cup 3 is placed on the tray of the electronic balance 4, realizing the weighing process of the moisture permeable cup 3; after weighing, the lifting component 5 drives the electronic balance 4 to fall, and the moisture permeable cup 3 falls back into the positioning hole 1081 and disengages from the tray of the electronic balance 4. The driving mechanism 2 is used to drive the turntable 108 to continue to rotate by an angle, and then the weight of the next moisture permeable cup 3 is measured.

[0037] Specifically, in this embodiment, as Figure 3 and Figure 4 As shown, the driving mechanism 2 includes a driving motor 21 and a rotating shaft 22. The driving motor 21 is fixedly installed on the top wall of the box body 1. The rotating shaft 22 is fixedly connected to the output shaft of the driving motor 21, and the rotating shaft 22 is fixedly connected to the turntable 108.

[0038] Specifically, as Figure 6 As shown, in order to be able to push the moisture permeable cup 3 upward and disengage it from the turntable 108 to realize the measurement of the weight of the moisture permeable cup 3, a supporting ring 41 is fixedly installed on the electronic balance 4. When measuring the weight of the moisture permeable cup 3, the bottom wall of the moisture permeable cup 3 is abutted against the top wall of the supporting ring 41, and then the moisture permeable cup 3 is lifted upward.

[0039] Since the electronic balance 4 is placed in the equipment cavity 106 and the moisture permeable cup 3 is located on the turntable 108 of the test cavity 105, in order to be able to bring the moisture permeable cup 3 into contact with the electronic balance 4 to realize the measurement of the weight of the moisture permeable cup 3, in this embodiment, as Figure 6 As shown, a tray component 6 extending through the partition 104 to the test cavity 105 is fixedly provided on the top wall of the supporting ring 41. Specifically, the electronic balance 4 and the supporting ring 41 are located in the equipment cavity 106, and the side wall of the tray component 6 is slidably connected to the partition 104. Among them, the tray component 6 forms a seal with the partition 104 to minimize the influence of the moisture in the test cavity 105 on the humidity in the equipment cavity 106.

[0040] Specifically, the partition plate 104 is provided with through holes that communicate the test chamber 105 and the equipment chamber 106, such as Figure 6 and Figure 8 As shown, the tray component 6 includes a supporting column 61 and a tray 62 provided at the top of the supporting column 61. Among them, the supporting column 61 passes through the through hole of the partition plate 104 and extends vertically upward into the test chamber 105. The side wall of the supporting column 61 is slidably connected to the inner wall of the through hole of the partition plate 104. Among them, the top wall of the supporting ring 41 is adhesively bonded to the bottom wall of the supporting column 61 with glue.

[0041] To achieve the positioning of the supporting column 61 and the supporting ring 41, the axis of the supporting column 61 is aligned with the axis of the supporting ring 41 to ensure the accuracy during the measurement of the electronic balance 4. In this embodiment, as Figure 6 and Figure 8 As shown, the bottom wall of the supporting column 61 is fixedly provided with a plugging column 612 that extends vertically downward. Among them, the supporting ring 41 is provided with a plugging interface 411 for the plugging column 612 to be plugged into. When the supporting column 61 is being installed, the plugging column 612 on the supporting column 61 is plugged into the plugging interface 411 of the supporting ring 41. At this time, the peripheral wall of the plugging column 612 abuts against the inner wall of the plugging interface 411, so that the axis of the supporting column 61 can be aligned with the axis of the supporting ring 41.

[0042] When weighing the moisture permeation cup 3, the moisture permeation cup 3 is located on the top wall of the tray 62.

[0043] In this embodiment, the environment in the test chamber 105 of the moisture permeation tester is maintained at 38°C and the humidity is 90%. When the tester is just turned on, due to the relatively low temperature of the tray component 6, at this time, condensed water is likely to be generated on the tray 62 of the tray component 6. The condensed water here is likely to slide down along the outer wall of the supporting column 61 into the equipment chamber 106, and the condensed water may drip onto the electronic balance 4, causing a risk of short circuit of the electronic balance 4.

[0044] As Figure 6 and Figure 8 As shown, the diameter of the tray 62 is larger than the diameter of the supporting column 61. The outer edge of the bottom wall of the tray 62 is provided with a second waterproof outer edge 621. The second waterproof outer edge 621 extends vertically downward from the bottom wall of the tray 62. When condensed water is formed on the tray 62, the condensed water on the tray 62 will drip on the bottom wall of the test chamber 105 at the second waterproof outer edge 621 of the tray 62, that is, on the upper part of the partition plate 104, preventing the condensed water on the tray 62 from sliding down along the supporting column 61 into the equipment chamber 106 and reducing the risk of the electronic balance 4 coming into contact with the condensed water.

[0045] To prevent the water on the top of the partition plate 104 from dripping downward along the through hole of the partition plate 104, in this embodiment, as Figure 6 and Figure 9As shown, it further includes a water retaining ring 8. Among them, the supporting column 61 passes through the water retaining ring 8. The water retaining ring 8 is installed at the through hole of the partition plate 104, and a part of the water retaining ring 8 extends vertically upward, thus preventing the water on the partition plate 104 from falling into the equipment cavity 106.

[0046] Specifically, the water retaining ring 8 is fixed on the partition plate 104 by waterproof glue.

[0047] As Figure 5 and Figure 6 shown, there is a gap between the bottom wall of the tray 62 and the top wall of the water retaining ring 8, and there is also a gap between the side wall of the supporting column 61 and the inner wall of the water retaining ring 8. At this time, the moisture in the test cavity 105 directly contacts the supporting column 61, and condensed water is formed on the peripheral wall of the supporting column 61 and flows downward along the peripheral wall of the supporting column 61. Since the bottom of the supporting column 61 is connected to the supporting ring 41, there is a risk that the condensed water will flow into the electronic balance 4 through the supporting ring 41 at this time; therefore, a first waterproof outer edge 611 extending obliquely downward along the radial direction is provided on the side wall of the bottom of the supporting column 61. The first waterproof outer edge 611 covers the outside of the top of the supporting ring 41, and the first waterproof outer edge 611 is smoothly connected to the peripheral wall of the supporting column 61.

[0048] Through the above settings, when the condensed water on the peripheral wall of the supporting column 61 flows downward, it will flow down along the outer wall to the first waterproof outer edge 611, and the condensed water is diverted to the supporting tray of the electronic balance 4 through the first waterproof outer edge 611. It should be noted here that the supporting tray is generally made of steel, and the water on the supporting tray will not flow into the inside of the electronic balance 4.

[0049] In order to strengthen the diversion effect of the condensed water on the first waterproof outer edge 611, in this embodiment, as Figure 6 shown, a limiting retaining ring 42 protruding upward is provided on the supporting tray of the electronic balance 4, and it further includes a diversion cover 7 covering the outside of the limiting retaining ring 42. Among them, the diversion cover 7 includes a vertical part and a diversion part. Specifically, the vertical part is cylindrical and sleeved on the outside of the limiting retaining ring 42, and the diversion part is conical and integrally formed with the top end of the vertical part. The diversion part extends below the first waterproof outer edge 611. When the condensed water drops on the first waterproof outer edge 611, the condensed water will be diverted to the supporting tray of the electronic balance 4 through the diversion part. At this time, the vertical upward extension of the limiting retaining ring 42 can also block the water on the supporting tray outside the electronic balance 4, preventing the condensed water from causing a short circuit of the electronic balance 4.

[0050] After the moisture permeation cup 3 clamps the sample, the placement of the moisture permeation cup 3 is divided into two methods: the positive cup method and the inverted cup method. In order to enable the moisture permeation tester to simultaneously realize the placement of the two moisture permeation cups 3, in this embodiment, as Figure 4As shown, it further includes a bracket 1003 with an upward opening. The longitudinal section of the bracket 1003 is U-shaped with an upward opening. The side wall of the bracket 1003 is provided with an outer edge that overlaps on the turntable 108. The bracket 1003 is placed upward in the positioning hole 1081. During the positive cup method measurement, the moisture permeability cup 3 can be directly placed in the inner cavity of the bracket 1003. When using the inverted cup method measurement, a support plate is placed on the top of the bracket 1003, and then the moisture permeability cup 3 is placed on the support plate on the bracket 1003. When weighing the moisture permeability cup 3, the tray 62 of the tray component 6 is used to push the bracket 1003 upward, so that the bracket 1003 is disengaged from the turntable 108, and thus the weights of the bracket 1003 and the moisture permeability cup 3 can be measured. Since the weight of the bracket 1003 is known, the weight of the moisture permeability cup 3 can be calculated.

[0051] In order to be able to lift the electronic balance 4, in this embodiment, as Figure 5 shown, the lifting component 5 includes a linear motor 51. Among them, the linear motor 51 is fixedly installed on the bottom wall of the equipment cavity 106 and is located directly below the electronic balance 4. The output end of the linear motor 51 is fixedly connected to the top wall of the electronic balance 4.

[0052] Through the above settings, the lifting of the electronic balance 4 can be realized by using the linear motor 51, so that the weighing operation of the moisture permeability cup 3 can be completed.

[0053] In order to improve the stability of the electronic balance 4 during the lifting process, in this embodiment, as Figure 5 and Figure 9 shown, a plurality of linear bearings 1000 are fixedly provided on the partition plate 104. Guide columns 100 that extend vertically upward and correspond to the linear bearings 1000 one by one are fixedly provided on the electronic balance 4. The guide columns 100 are connected to the linear bearings 1000. It should be noted here that four guide columns 100 are provided and are located at the four corners of the electronic balance 4 to improve the stability of the lifting of the electronic balance 4.

[0054] During the working process of the moisture permeability tester, vibrations will be generated, which will affect the measurement of the weight of the moisture permeability cup 3 by the electronic balance 4. Therefore, in this embodiment, as Figure 7 shown, the top of the linear motor 51 is provided with a support cylinder 511 with an upward opening. A spring 9 is arranged inside the support cylinder 511. Among them, the bottom end of the spring 9 is fixedly connected to the bottom wall of the support cylinder 511, and the top wall of the spring 9 extends out of the support cylinder 511 and is fixedly connected to the bottom wall of the electronic balance 4.

[0055] With the above settings, when the electronic balance 4 needs to be lifted to measure the weight of the moisture permeation cup 3, the linear motor 51 slowly jacks up the electronic balance 4 through the spring 9, minimizing the shaking of the electronic balance 4. During the operation of the device, the vibration of the device is transmitted to the linear motor 51. At this time, through the buffering of the spring 9, the amplitude of the vibration of the electronic balance 4 can be reduced, improving the accuracy of the weight measurement of the moisture permeation cup 3.

[0056] Since the humidity inside the test chamber 105 is maintained at 90%, the test chamber 105 and the device chamber 106 can communicate through the through holes on the partition plate 104. At this time, the moisture in the test chamber 105 will flow into the device chamber 106, thereby increasing the humidity of the device chamber 106. Since the humidity environment required for the use of the electronic balance 4 is below 80%, the excessive humidity in the device chamber 106 will affect the use of the electronic balance 4. Therefore, it is necessary to process the humidity in the device chamber 106.

[0057] It should be noted here that in this embodiment, the model of the electronic balance 4 is PR423ZH / E.

[0058] In this embodiment, as Figure 1 、 Figure 3 and Figure 10 shown, an exhaust fan 1002 communicating with the device chamber 106 is also provided on the outer wall of the box body 1. Among them, the exhaust fan 1002 can discharge the moisture in the device chamber 106 to the outside of the box body 1, thereby reducing the humidity inside the device chamber 106.

[0059] Since the exhaust fan 1002 extracts the air inside the device chamber 106 outwards, the gas extracted should also be replenished into the device chamber 106. Therefore, in this embodiment, there are two exhaust fans 1002, namely the first exhaust fan 10021 and the second exhaust fan 10022. Among them, the first exhaust fan 10021 extracts the moisture inside the device chamber 106 to the outside, and the second exhaust fan 10022 conveys the dry air outside into the device chamber 106, realizing the circulation of the air inside and outside the device chamber 106, so as to control the humidity inside the device chamber 106 and provide a suitable working environment for the electronic balance 4.

[0060] In order to provide a constant temperature and humidity environment for the test chamber 105 of the moisture permeation tester, in this embodiment, as Figure 1 and Figure 3As shown, a circulation channel 10 is installed on the box body 1. Specifically, the circulation channel 10 includes an air inlet channel 101 located on one side of the box body 1 and an air outlet channel 102 located on the other side of the box body 1. Among them, both the air inlet channel 101 and the air outlet channel 102 are communicated with the test chamber 105. The water vapor evaporated under the equipment flows into the test chamber 105 through the air inlet channel 101, and then flows downward and back through the air outlet channel 102, providing a constant temperature and humidity environment for the test chamber 105.

[0061] When the tester stops working, in order to be able to quickly reduce the temperature and humidity inside the tester, in this embodiment, as Figure 1 and Figure 10 shown, an exhaust window 103 that switches between a first state and a second state is installed at the circulation channel 10. In the first state, as Figure 1 shown, the exhaust window 103 closes the window that communicates the circulation channel 10 with the outside. In the second state, as Figure 10 shown, the exhaust window 103 opens the window that communicates the circulation channel 10 with the outside.

[0062] Among them, the box body 1 also includes an electric push rod 1001. The output end of the electric push rod 1001 is connected to the exhaust window 103, and the exhaust window 103 is connected to the box body 1 through a hinge. When the electric push rod 1001 pushes the exhaust window 103 to open the window of the circulation channel 10, the circulation channel 10 communicates with the outside. At this time, the tester stops working, the circulation channel 10 reduces the supply of steam to the test chamber 105, and at the same time, the steam inside the circulation channel 10 is discharged to the outside, accelerating the reduction speed of the temperature and humidity of the tester.

[0063] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention 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 invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. An automatic weighing moisture permeability tester, comprising a box body (1). Inside the box body (1), there is a turntable (108) and a driving mechanism (2) for driving the turntable (108) to rotate. A plurality of circumferentially distributed positioning holes (1081) for placing moisture permeability cups (3) are provided on the turntable (108). An electronic balance (4) is arranged directly below one of the positioning holes (1081). It is characterized in that: The invention comprises a partition (104) for separating the inner cavity of a box body (1) into a test cavity (105) and an equipment cavity (106); the test cavity (105) is located above the equipment cavity (106); a turntable (108) is arranged in the test cavity (105); an electronic balance (4) is arranged in the equipment cavity (106); a lifting component (5) for lifting the electronic balance (4) is arranged in the equipment cavity (106); a lifting component (5) for lifting the electronic balance (4) is arranged on the partition (104); A through hole is formed above the electronic balance (4); a tray component (6) is fixedly provided on the supporting ring (41) of the electronic balance (4) and extends through the through hole to the test cavity (105); a guide cover (7) is provided on the supporting tray of the electronic balance (4) and is sleeved on the outside of the supporting ring (41); a waterproof outer edge is provided on the tray component (6) for allowing condensed water to slide to the guide cover (7); and an exhaust fan (1002) is provided on the box body (1) and is connected to the equipment cavity (106).

2. The automatic weighing moisture permeability tester according to claim 1, wherein: The top of the electronic balance (4) supporting tray is provided with a fixed upwardly extending limit ring (42), and the air guide cover (7) is buckled on the outer side of the limit ring (42).

3. An automatic weighing moisture permeability tester according to claim 1 or 2, characterized in that: The tray component (6) comprises a supporting column (61) and a tray (62) fixedly mounted on the top of the supporting column (61); the tray (62) is located in the test cavity (105); the side wall of the supporting column (61) is slidably connected to the inner wall of the through hole on the partition (104); the bottom wall of the supporting column (61) is fixedly provided with a plug-in column (612) extending downward; the supporting ring (41) is provided with a plug-in interface (411); the plug-in column (612) is plugged into the plug-in interface (411); and the peripheral wall of the plug-in column (612) abuts against the inner wall of the plug-in interface (411).

4. An automatic weighing moisture permeability tester according to claim 3, characterized in that: The diameter of the tray (62) is greater than the diameter of the supporting column (61), and the waterproof outer edge includes a first waterproof outer edge (611) and a second waterproof outer edge (621). The first waterproof outer edge (611) is arranged on the bottom peripheral wall of the supporting column (61) and extends to the top of the guide part of the guide cover (7), and the second waterproof outer edge (621) is arranged at the outer edge of the bottom wall of the tray (62).

5. The automatic weighing moisture permeability tester according to claim 3, characterized in that: It also includes a water retaining ring (8) installed inside the through hole of the partition plate (104), wherein the water retaining ring (8) extends vertically upward, and the supporting column (61) passes through the water retaining ring (8) and extends upward.

6. The automatic weighing moisture permeability tester according to claim 1, wherein: The lifting component (5) comprises a linear motor (51), which is fixedly mounted on the bottom wall of the equipment cavity (106), and the output end of the linear motor (51) is fixedly connected to the electronic balance (4).

7. An automatic weighing moisture permeability tester according to claim 6, characterized in that: A plurality of linear bearings (1000) are fixedly arranged on the partition (104), a vertically arranged guide column (100) is slidably connected inside the linear bearing (1000), and the bottom of the guide column (100) is fixedly connected to the electronic balance (4).

8. An automatic weighing moisture permeability tester according to claim 6 or 7, characterized in that: A supporting cylinder (511) is provided at the top of the linear motor (51), a spring (9) is provided in the supporting cylinder (511), one end of the spring (9) is fixedly connected to the bottom wall of the supporting cylinder (511), and the other end of the spring (9) extends out of the supporting cylinder (511) and is fixedly connected to the bottom wall of the electronic balance (4).

9. The automatic weighing moisture permeability tester according to claim 1, wherein: The exhaust fan (1002) includes a first exhaust fan (10021) and a second exhaust fan (10022). The first exhaust fan (10021) is used to extract the moisture in the equipment chamber (106), and the second exhaust fan (10022) is used to supplement the equipment chamber (106) with dry outside air.

10. The automatic weighing moisture permeability tester according to claim 1, wherein: A circulation channel (10) is provided in the box body (1). The circulation channel (10) includes an intake channel (101) and an outlet channel (102) that communicate with the test chamber (105). An exhaust window (103) and an electric push rod (1001) for switching the exhaust window (103) between a first state and a second state are hinged on the circulation channel (10). In the first state, the exhaust window (103) closes the window connecting the circulation channel (10) to the outside environment. In the second state, the exhaust window (103) opens the window connecting the circulation channel (10) to the outside environment.

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