A sampling device for water vapor transmission rate detection

Abstract

The utility model discloses a kind of for water vapor permeability detection sampling device, including box, the top of box is equipped with inlet, the side of connecting pipe is equipped with connecting structure, connecting structure includes the side of valve is equipped with second flange, connecting structure includes the side of connecting pipe is equipped with first flange, the inside of first flange and second flange is provided with installation groove. The utility model can connect pipe body and connecting pipe together by installing second flange on one side of pipe body, cooperating first flange and second flange, connecting first flange and second flange together by cooperating fixing screw and nut, and fixing connecting pipe on one side of pipe body. When installing first flange and second flange, filter membrane can be installed in the installation groove between flanges to prevent deviation during detection.

Description

Technical Field

[0001] This utility model relates to the field of transmittance detection technology, and in particular to a sampling device for detecting water vapor transmittance. Background Technology

[0002] When testing the filtration effect of filter membranes and other materials, a sampling device for water vapor transmission rate testing is needed. Water vapor transmission rate actually includes two meanings: water vapor transmission amount and water vapor transmission coefficient. These two meanings have some differences, but both can be used to indicate the ability of water vapor to pass through a certain material. Water vapor transmission rate testing is an important method for evaluating the water vapor blocking performance of materials and is widely used in packaging, film, textile, medical and other fields. The sampling device is a key piece of equipment in the testing process, used to prepare or fix the sample to be tested.

[0003] Current sampling devices for water vapor transmission rate testing can basically meet people's needs, but there are still some problems, as follows: When using them to test the filter membrane and other materials, the filter membrane is not fixed stably enough, and the filter membrane may shift during testing. Utility Model Content

[0004] The purpose of this invention is to provide a sampling device for detecting water vapor transmission rate, in order to solve the problem that existing sampling devices for detecting water vapor transmission rate have difficulty in limiting the position of the filter membrane.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a sampling device for detecting water vapor transmission rate, comprising a housing;

[0006] An inlet is installed at the top of the box, a cover is installed at the top of the inlet, a pipe is installed on one side of the box, and an air pump is installed on one side of the pipe.

[0007] A valve is installed on one side of the air pump, and a connecting pipe is installed on one side of the valve. A housing is installed at the bottom end of the connecting pipe, and a connecting structure is installed on one side of the connecting pipe.

[0008] The connection structure includes a second flange installed on one side of the valve, and a first flange installed on one side of the connecting pipe. Both the first flange and the second flange have mounting grooves inside.

[0009] In use, first open the cover and fill the chamber with water through the inlet. The heating wire inside the chamber heats the inside, allowing the water to evaporate quickly. The evaporated water vapor rises, and the suction pump draws the water vapor into the tube. After passing through the limiting filter membrane, the vapor condenses inside the connecting tube. The condensed water remains inside the connecting tube and the housing. After testing, the connecting tube can be disassembled, and the approximate water vapor permeability of the filter membrane can be determined by the weight of the water inside the connecting tube.

[0010] Furthermore, the interior of the housing is inlaid with heating wires, which are serpentine in shape and can heat the water inside the housing.

[0011] Furthermore, a sealing structure is installed at the bottom of the cover. The sealing structure includes a sealing block installed at the bottom of the cover, a sealing gasket at the bottom of the sealing block, and a sealing ring installed on the outside of the sealing block. The sealing structure can seal the inlet.

[0012] Furthermore, a filter membrane is provided inside the mounting groove, a fixing screw passes through one side of the first flange, and a nut is installed on one side of the fixing screw, so that the filter membrane can be confined inside the groove.

[0013] Furthermore, the outer side wall of the fixing screw is uniformly provided with external threads, and the inner side wall of the nut is uniformly provided with internal threads that cooperate with the external threads. The fixing screw and the nut are threadedly connected, and the fixing screw and the nut can be connected together to the first flange and the second flange.

[0014] Furthermore, a heat dissipation structure is installed on the outside of the connecting pipe, and the heat dissipation structure includes a heat-conducting block on the outside of the connecting pipe, and a heat dissipation fin on the outside of the heat-conducting block, so that the heat dissipation structure can dissipate heat quickly.

[0015] Furthermore, one end of the heat sink is provided with through holes, and the through holes are arranged at equal intervals at one end of the heat sink, which can increase the surface area of ​​the heat sink.

[0016] The sampling device for water vapor transmission rate detection provided by this utility model has the following advantages: during use, the connecting pipe can be fixed by the connecting structure, making it convenient to disassemble the connecting pipe to detect the steam and water inside the connecting pipe; the filter membrane can also be limited; the water vapor can be quickly condensed into water by the heat dissipation structure; and the sealing structure can enhance the sealing between the cover and the inlet.

[0017] A second flange is installed on one side of the pipe body. The second flange and the first flange form a snap-fit ​​structure. The first flange and the second flange cooperate to connect the pipe body and the connecting pipe together. The fixing screws and nuts form a threaded connection. The first flange and the second flange can be connected together by the fixing screws and nuts, so that the connecting pipe can be fixed on one side of the pipe body. When the first flange and the second flange are installed, the filter membrane can be installed and limited inside the mounting groove between the flanges to prevent the filter membrane from shifting during the test. When water vapor passes through the filter membrane, the water vapor can condense inside the connecting pipe and fall into the shell. Then the nut can be unscrewed, the connecting pipe can be disassembled, and the weight of the water inside the connecting pipe and the shell can be measured to know the permeability of the filter membrane. This achieves the purpose of facilitating the limiting of the filter membrane in the water vapor permeability testing sampling device.

[0018] By installing a heat-conducting block on the outside of the connecting pipe, the heat-conducting block and the heat sink can be made of brass. The heat-conducting block can absorb the heat inside the connecting pipe, and then the heat sink can dissipate the heat quickly. The heat sink has through holes arranged at equal intervals, which can increase the surface area of ​​the heat sink and make the heat dissipation effect better. This allows water vapor to condense into water quickly, thereby achieving the purpose of facilitating the rapid condensation of water vapor in the water vapor transmission rate detection sampling device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0021] Figure 3 For the present utility model Figure 2 Enlarged cross-sectional view of a portion of point A in the middle section;

[0022] Figure 4 This is a partial three-dimensional structural diagram of the heat dissipation structure of this utility model;

[0023] Figure 5 This is a partial three-dimensional structural diagram of the connection structure of this utility model.

[0024] The following are the annotations in the diagram: 1. Box body; 2. Inlet; 3. Cover; 4. Pipe; 5. Air pump; 6. Valve; 7. Shell; 8. Heat dissipation structure; 801. Heat-conducting block; 802. Heat sink; 803. Through hole; 9. Connecting pipe; 10. Connecting structure; 1001. First flange; 1002. Second flange; 1003. Nut; 1004. Fixing screw; 1005. Filter membrane; 1006. Mounting groove; 11. Heating wire; 12. Sealing structure; 1201. Sealing block; 1202. Sealing ring; 1203. Sealing gasket. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 One embodiment of this utility model is a sampling device for detecting water vapor transmission rate, comprising a housing 1.

[0027] An inlet 2 is installed at the top of the box 1, and a heating wire 11 is embedded inside the box 1, and the heating wire 11 is serpentine in shape.

[0028] A cover 3 is installed at the top of the inlet 2, and a sealing structure 12 is installed at the bottom of the cover 3. The sealing structure 12 includes a sealing block 1201 installed at the bottom of the cover 3, and a sealing gasket 1203 is provided at the bottom of the sealing block 1201. A sealing ring 1202 is installed on the outside of the sealing block 1201.

[0029] See attached document Figure 2-3 As shown, the cover 3 can be opened, and water can be poured into the chamber 1 through the inlet 2. The heating wire 11 inside the chamber 1 heats the inside of the chamber 1, which can quickly evaporate the water. The evaporated water vapor can rise, and the working air pump 5 will generate suction to draw the water vapor into the tube 4. Then, after passing through the limiting filter membrane 1005, it enters the connecting pipe 9 and condenses. The condensed water can remain inside the connecting pipe 9 and the shell 7. After the test is completed, the connecting pipe 9 can be disassembled. The approximate water vapor permeation rate of the filter membrane 1005 can be obtained by the weight of the water inside the connecting pipe 9. After the cover 3 is closed, the sealing block 1201 at the bottom of the cover 3 can be inserted into the inlet 2. The sealing gasket 1203 at the bottom of the sealing block 1201 and the sealing ring 1202 on the outside of the sealing block 1201 can both be made of rubber material. The sealing gasket 1203 and the sealing ring 1202 can enhance the sealing between the cover 3 and the inlet 2.

[0030] A pipe 4 is installed on one side of the housing 1, and an air pump 5 is installed on one side of the pipe 4.

[0031] A valve 6 is installed on one side of the air pump 5, and a connecting pipe 9 is installed on one side of the valve 6. A heat dissipation structure 8 is installed on the outside of the connecting pipe 9. The heat dissipation structure 8 includes a heat-conducting block 801 on the outside of the connecting pipe 9, and a heat sink 802 on the outside of the heat-conducting block 801. A through hole 803 is provided at one end of the heat sink 802, and the through holes 803 are arranged at equal intervals at one end of the heat sink 802.

[0032] See attached document Figure 1-2 and attached Figure 4 As shown, the heat-conducting block 801 is disposed on the surface of the connecting pipe 9. The heat-conducting block 801 and the heat sink 802 can be made of brass. The heat-conducting block 801 can absorb the heat inside the connecting pipe 9, and then the heat sink 802 can dissipate the heat quickly. The heat sink 802 is provided with through holes 803 arranged at equal intervals. The through holes 803 can increase the surface area of ​​the heat sink 802 and make the heat dissipation effect better, so that water vapor can be quickly condensed into water.

[0033] A housing 7 is installed at the bottom end of the connecting pipe 9, and a connecting structure 10 is installed on one side of the connecting pipe 9.

[0034] The connecting structure 10 includes a second flange 1002 installed on one side of the valve 6, and a first flange 1001 installed on one side of the connecting pipe 9. Both the first flange 1001 and the second flange 1002 have mounting grooves 1006 inside. A filter membrane 1005 is installed inside the mounting grooves 1006. A fixing screw 1004 passes through one side of the first flange 1001. External threads are evenly provided on the outer side wall of the fixing screw 1004. Internal threads that cooperate with the external threads are evenly provided on the inner side wall of the nut 1003. The fixing screw 1004 and the nut 1003 are threadedly connected. The nut 1003 is installed on one side of the fixing screw 1004.

[0035] See attached document Figure 1-2 and attached Figure 5As shown, the second flange 1002 and the first flange 1001 form a snap-fit ​​structure. The first flange 1001 and the second flange 1002 can be used to connect the pipe body 4 and the connecting pipe 9 together. The fixing screw 1004 and the nut 1003 form a threaded connection. The first flange 1001 and the second flange 1002 can be connected together by the fixing screw 1004 and the nut 1003, so that the connecting pipe 9 can be fixed on one side of the pipe body 4. When the first flange 1001 and the second flange 1002 are installed, the filter membrane 1005 can be installed and limited inside the mounting groove 1006 between the flanges to prevent the filter membrane 1005 from shifting during testing. When water vapor passes through the filter membrane 1005, the water vapor can condense inside the connecting pipe 9 and fall into the housing 7. Then the nut 1003 can be unscrewed, the connecting pipe 9 can be disassembled, and the weight of the water inside the connecting pipe 9 and the housing 7 can be measured to know the permeability of the filter membrane 1005.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sampling device for detecting water vapor transmission rate, comprising a housing (1); Its features are: An inlet (2) is installed at the top of the box (1), a cover (3) is installed at the top of the inlet (2), a pipe (4) is installed on one side of the box (1), and an air pump (5) is installed on one side of the pipe (4). A valve (6) is installed on one side of the air pump (5), and a connecting pipe (9) is installed on one side of the valve (6). A housing (7) is installed at the bottom end of the connecting pipe (9), and a connecting structure (10) is installed on one side of the connecting pipe (9). The connection structure (10) includes a second flange (1002) installed on one side of the valve (6), and a first flange (1001) installed on one side of the connecting pipe (9). The first flange (1001) and the second flange (1002) are both provided with mounting grooves (1006).

2. The sampling device for detecting water vapor transmission rate according to claim 1, characterized in that: The housing (1) is inlaid with a heating wire (11), and the heating wire (11) is serpentine in shape.

3. The sampling device for detecting water vapor transmission rate according to claim 1, characterized in that: The bottom end of the cover (3) is equipped with a sealing structure (12), the sealing structure (12) includes a sealing block (1201) installed at the bottom end of the cover (3), and a sealing gasket (1203) is provided at the bottom end of the sealing block (1201), and a sealing ring (1202) is installed on the outside of the sealing block (1201).

4. The sampling device for detecting water vapor transmission rate according to claim 1, characterized in that: The mounting groove (1006) is provided with a filter membrane (1005), and a fixing screw (1004) passes through one side of the first flange (1001), and a nut (1003) is installed on one side of the fixing screw (1004).

5. The sampling device for detecting water vapor transmission rate according to claim 4, characterized in that: The fixing screw (1004) has external threads evenly distributed on its outer side wall, and the nut (1003) has internal threads evenly distributed on its inner side wall that cooperate with the external threads. The fixing screw (1004) and the nut (1003) are connected by threads.

6. The sampling device for detecting water vapor transmission rate according to claim 1, characterized in that: A heat dissipation structure (8) is installed on the outside of the connecting pipe (9), and the heat dissipation structure (8) includes a heat-conducting block (801) on the outside of the connecting pipe (9), and a heat sink (802) on the outside of the heat-conducting block (801).

7. The sampling device for detecting water vapor transmission rate according to claim 6, characterized in that: One end of the heat sink (802) is provided with a through hole (803), and the through holes (803) are arranged at equal intervals at one end of the heat sink (802).

Images