Device for testing air tightness of ion exchange membrane under different humidity

Abstract

The utility model relates to the technical field of air tightness testing, and particularly discloses an air tightness testing device for an ion exchange membrane under different humidities, which comprises a plugging mechanism for isolating and sealing the ion exchange membrane, and a detection mechanism for testing the air tightness of the ion exchange membrane is communicated with the plugging mechanism. The plugging mechanism comprises a lower sealing plate on the supporting assembly, and an upper sealing plate is arranged on the upper side of the lower sealing plate. Through the arrangement of the plugging mechanism and the detection mechanism, an ion exchange membrane is extruded and sealed by the upper sealing plate and the lower sealing plate through a sealing gasket by the plugging assembly, then gas is adjusted and introduced into an annular gas channel of the upper sealing plate, and a water column communicated with the lower sealing plate and a pressure gauge on a gas tank are observed, so that the working condition is close to an actual use working condition; the method is simple in operation, the test result is high in use value, meanwhile, the problem of screening of the ion exchange membrane before assembly is solved, the problem that the ion exchange membrane with tiny defects cannot be observed by naked eyes and is repeatedly disassembled and assembled after being assembled and used is solved, and the use convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness testing, in particular to an ion exchange membrane air tightness testing device under different humidity conditions. Background Art

[0002] Ion exchange membranes can be divided into two categories: homogeneous membranes and heterogeneous membranes. Ion exchange membranes have been widely used in the chlor-alkali field and in fuel cells and flow battery energy storage. In addition, industrial production and applications such as seawater desalination, high-salinity wastewater treatment, food desalination, and biological purification place high demands on ion exchange membranes.

[0003] Ion exchange membranes are usually composed of a polymer skeleton, fixed ion functional groups and mobile counter-charged ions. According to the type of ion groups, they are divided into anion exchange membranes, cation exchange membranes and amphoteric ion exchange membranes. Cation exchange membranes carry negatively charged groups, while anion exchange membranes carry positively charged groups, which are fixed on the membrane skeleton and can selectively allow ions of opposite charge to pass through while blocking ions of the same charge from passing through.

[0004] Ion exchange membranes have high performance requirements and are expensive in both the chlor-alkali field and fuel cells and flow battery energy storage. They directly affect the long-term stable operation of the entire system and are one of the key materials in various application fields. Therefore, it is particularly important to screen the uniformity and defect-freeness of ion exchange membranes during assembly and use. Among them, we can directly identify obvious defects with the naked eye, but tiny holes are difficult to identify with the naked eye. Once a defective ion exchange membrane is assembled and used, the performance loss is relatively large after testing. Repeated disassembly and assembly of ion exchange membranes increases the probability of mechanical and physical damage. In addition, the applications in the chlor-alkali field and fuel cells and flow battery energy storage are operated under high water content or completely water systems. The ion exchange membrane absorbs water to different degrees at different humidity, resulting in large size changes after absorbing water. It is also difficult to assemble and use repeatedly. Therefore, screening and synthesizing ion exchange membranes is crucial.

[0005] Therefore, the utility model proposes an ion exchange membrane air tightness testing device under different humidity conditions. The device can detect tiny defects that are difficult to distinguish with the naked eye before assembly, and has simple operation and strong practicality. Utility Model Content

[0006] The purpose of the utility model is to provide an ion exchange membrane air tightness testing device under different humidity conditions in order to solve the above problem.

[0007] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0008] The air tightness testing device of an ion exchange membrane under different humidity comprises a sealing mechanism for isolating the ion exchange membrane, the sealing mechanism is connected with a detection mechanism for performing air tightness testing on the ion exchange membrane, the sealing mechanism comprises a supporting assembly, a lower sealing plate is fixed on the supporting assembly, a sinking platform is arranged on the lower sealing plate, an air outlet pipe connected with the sinking platform is arranged on the side wall of the lower sealing plate, a sealing gasket is arranged on the lower sealing plate around the sinking platform, an upper sealing plate is arranged on the upper side of the lower sealing plate, an annular airway is opened on the upper sealing plate at a position corresponding to the sinking platform, an air inlet pipe and an exhaust pipe connected with the annular airway are respectively arranged on both sides of the upper sealing plate, a valve body is installed on the exhaust pipe, a sealing assembly for driving the upper sealing plate to move and close the lower sealing plate is arranged on the supporting assembly, the detection mechanism comprises a gas tank connected with the air inlet pipe, a pressure gauge and a pressure reducing valve are installed on the gas tank, a connecting pipe is arranged between the pressure reducing valve and the air inlet pipe, an adjusting assembly is arranged on the connecting pipe, and a water column with scale lines on the surface is connected to the air outlet pipe.

[0009] Further configuration: the support component includes a bottom plate, a column is fixed on the upper end of the bottom plate, a top plate is fixed on the upper end of the column, the top plate is connected to the blocking component, and the lower sealing plate is fixed on the upper end of the bottom plate.

[0010] Further arrangement: the blocking assembly includes an installation frame fixed to the upper end of the top plate, a vertical shaft is rotatably installed on the installation frame, an active bevel gear is fixed to the lower end of the vertical shaft, a connecting assembly is arranged around the active bevel gear, the connecting assembly includes a lead screw, a transmission bevel gear meshing with the active bevel gear is arranged at one end of the lead screw, a sliding seat is arranged on the lead screw, a connecting rod is arranged on the lower side of the sliding seat, the lower end of the connecting rod is rotatably connected to the upper sealing plate through a pin shaft, a worm wheel is fixed on the vertical shaft, a worm is meshed with one side of the worm wheel, and a servo motor is arranged at one end of the worm.

[0011] Further configuration: the connecting assembly is provided at four locations, the lead screw is rotatably connected to the top plate, a through slot is provided on the top plate for the sliding seat to pass through, the sliding seat is threadedly connected to the lead screw, the connecting rod is rotatably connected to the sliding seat through a pin shaft, and the lead screw is rotatably connected to the top plate.

[0012] Further configuration: the regulating component comprises a three-way valve arranged on the connecting pipe, and the three-way valve is connected to the humidifier.

[0013] Further configuration: the material of the lower sealing plate and the upper sealing plate is any one of stainless steel, graphite plate, polypropylene plate or polyethylene plate.

[0014] Further configuration: the sealing gasket material can be polytetrafluoroethylene, silicone rubber, fluororubber or asbestos.

[0015] Further configuration: the gas in the gas tank is any one of nitrogen, air, oxygen, hydrogen or helium.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] By setting up the sealing mechanism and the detection mechanism, the sealing assembly squeezes and seals the ion exchange membrane with the upper sealing plate and the lower sealing plate through the sealing gasket, and then the gas is adjusted and passed into the annular airway of the upper sealing plate, and the water column connected to the lower sealing plate and the pressure gauge on the gas tank are observed, so as to achieve working conditions close to those in actual use. The test results have high use value and can also solve the problem of screening the ion exchange membrane before assembly, avoiding the problem of repeated disassembly and assembly of the ion exchange membrane after assembly due to tiny defects that are not observable by the naked eye, thereby improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an ion exchange membrane air tightness testing device under different humidity conditions described in the utility model;

[0020] Figure 2 This is a schematic structural diagram of another viewing angle of the ion exchange membrane air tightness testing device under different humidity conditions described in the utility model;

[0021] Figure 3 It is a schematic diagram of the main structure of a device for testing the air tightness of an ion exchange membrane under different humidity conditions described in the utility model;

[0022] Figure 4 It is a partial structural schematic diagram of a blocking mechanism of an ion exchange membrane air tightness testing device under different humidity conditions described in the utility model;

[0023] Figure 5 yes Figure 4 Another perspective structural diagram of;

[0024] Figure 6 It is a schematic diagram of the structure of the disassembled state of the plugging component of the ion exchange membrane air tightness testing device under different humidity conditions described in the utility model.

[0025] The following are the descriptions of the reference numerals:

[0026] 11. Bottom plate; 12. Upright column; 13. Top plate; 131. Mounting frame; 14. Lower sealing plate; 141. Exhaust pipe; 15. Sealing pad; 16. Upper sealing plate; 161. Annular air duct; 162. Inlet pipe; 163. Exhaust pipe; 101. Vertical shaft; 102. Active bevel gear; 103. Transmission bevel gear; 104. Lead screw; 105. Sliding seat; 106. Connecting rod; 107. Worm gear; 108. Worm; 109. Servo motor; 21. Gas tank; 22. Pressure gauge; 23. Connecting pipe; 24. Pressure reducing valve; 25. Humidifier; 26. Three-way valve; 3. Water column. DETAILED DESCRIPTION

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] The utility model is further described below in conjunction with the accompanying drawings:

[0030] like Figure 1-Figure 6 As shown, a device for testing the air tightness of an ion exchange membrane under different humidity conditions includes a sealing mechanism for isolating the ion exchange membrane, and a detection mechanism for testing the air tightness of the ion exchange membrane is connected to the sealing mechanism;

[0031] In this embodiment: the blocking mechanism includes a support assembly, on which a lower sealing plate 14 is fixed, a sinking platform is arranged on the lower sealing plate 14, an air outlet pipe 141 connected to the sinking platform is arranged on the side wall of the lower sealing plate 14, and a sealing gasket 15 is arranged on the lower sealing plate 14 around the sinking platform. The material of the sealing gasket 15 is selected from polytetrafluoroethylene, silicone rubber, fluororubber or asbestos; an upper sealing plate 16 is arranged on the upper side of the lower sealing plate 14, and an annular air channel 161 is opened on the upper sealing plate 16 at a position corresponding to the sinking platform to increase the contact area between the gas and the ion exchange membrane, and an air inlet pipe 162 and an exhaust pipe 163 connected to the annular air channel 161 are respectively arranged on both sides of the upper sealing plate 16, and a valve body is installed on the exhaust pipe 163. The material of the lower sealing plate 14 and the upper sealing plate 16 is any one of stainless steel, graphite plate, polypropylene plate or polyethylene plate; a blocking assembly for driving the upper sealing plate 16 to move and close the lower sealing plate 14 is arranged on the support assembly;

[0032] The support assembly includes a bottom plate 11, a column 12 is fixed to the upper end of the bottom plate 11, a top plate 13 is fixed to the upper end of the column 12, the top plate 13 is connected to the plugging assembly, and a lower sealing plate 14 is fixed to the upper end of the bottom plate 11 to support the plugging assembly.

[0033] The plugging assembly includes a mounting frame 131 fixed to the upper end of the top plate 13, a vertical shaft 101 is rotatably mounted on the mounting frame 131, an active bevel gear 102 is fixed to the lower end of the vertical shaft 101, a connecting assembly is arranged around the active bevel gear 102, and the connecting assembly includes a lead screw 104, a transmission bevel gear 103 meshing with the active bevel gear 102 is arranged at one end of the lead screw 104, a sliding seat 105 is arranged on the lead screw 104, a connecting rod 106 is arranged at the lower side of the sliding seat 105, the lower end of the connecting rod 106 is rotatably connected to the upper sealing plate 16 through a pin shaft, a worm wheel 107 is fixed to the vertical shaft 101, a worm 108 is meshed on one side of the worm wheel 107, and a servo motor 109 is arranged at one end of the worm 108; the connecting assembly includes a lead screw 104, a transmission bevel gear 103 meshing with the active bevel gear 102 is arranged at one end of the lead screw 104, a sliding seat 105 is arranged on the lead screw 104, a connecting rod 106 is arranged at the lower side of the sliding seat 105, and the lower end of the connecting rod 106 is rotatably connected to the upper sealing plate 16 through a pin shaft, a worm wheel 107 is fixed to the vertical shaft 101, a worm 108 is meshed on one side of the worm wheel 107, and a servo motor 109 is arranged at one end of the worm 108; The components are arranged at four places, the lead screw 104 is rotatably connected with the top plate 13, a through groove is opened on the top plate 13 for the sliding seat 105 to pass through, the sliding seat 105 is threadedly connected with the lead screw 104, the connecting rod 106 is rotatably connected with the sliding seat 105 through a pin shaft, the lead screw 104 is rotatably connected with the top plate 13, and the servo motor 109 drives the vertical shaft 101 to rotate, so that the active bevel gear 102 on the vertical shaft 101 engages and rotates with the transmission bevel gear 103, driving the lead screw 104 to rotate, and the lead screw 104 pushes the sliding seat 105 to move. When the sliding seat 105 moves, it drives the upper sealing plate 16 to move up and down through the connecting rod 106, so as to adjust the position of the upper sealing plate 16 and the lower sealing plate 14 to achieve separation or sealing.

[0034] In this embodiment: the detection mechanism includes a gas tank 21 connected to the air inlet pipe 162, the gas in the gas tank 21 is any one of nitrogen, air, oxygen, hydrogen or helium, a pressure gauge 22 and a pressure reducing valve 24 are installed on the gas tank 21, a connecting pipe 23 is arranged between the pressure reducing valve 24 and the air inlet pipe 162, the connecting pipe 23 is provided with an adjusting component, and the air outlet pipe 141 is connected to a water column 3 with scale lines on the surface; the adjusting component includes a three-way valve 26 arranged on the connecting pipe 23, and the three-way valve 26 is connected to a humidifier 25; the humidifier 25 is selected from any one of an ultrasonic humidifier, an electric humidifier, a steam humidifier, and a centrifugal humidifier, and is used to adjust and change the humidity of the gas entering the upper sealing plate 16.

[0035] The working principle and use process of the utility model are as follows: the ion exchange membrane is laid flat on the sealing gasket 15 of the lower sealing plate 14, and the servo motor 109 is used to drive the vertical shaft 101 to rotate, so that the active bevel gear 102 on the vertical shaft 101 is meshed and rotated with the transmission bevel gear 103, driving the lead screw 104 to rotate, and the lead screw 104 pushes the sliding seat 105 to move. When the sliding seat 105 moves, the connecting rod 106 pushes the upper sealing plate 16 to move downward, clamping and fixing the ion exchange membrane between the upper sealing plate 16 and the lower sealing plate 14, opening the pressure reducing valve 24 on the gas tank 21, and allowing the gas to enter the upper sealing plate through the connecting pipe 23. 16, observe the state of the water column 3 connected to the air outlet pipe 141, record the water level in the water column 3 and the pressure of the pressure gauge 22 on the gas tank 21, and observe whether there are bubbles in the water column 3; at the same time, start the humidifier 25, adjust the amount of gas humidification produced by the humidifier 25, adjust the three-way valve 26, so that gases with different humidity can be passed into the annular air channel 161 of the upper sealing plate 16, observe the state of the water column 3 connected to the air outlet pipe 141, record the water level in the water column 3 and the pressure of the pressure gauge 22 on the gas tank 21, and observe whether there are bubbles in the water column 3.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An ion exchange membrane air tightness test device under different humidity conditions, characterized in that: The invention comprises a plugging mechanism for sealing an ion exchange membrane, the plugging mechanism being connected to a detection mechanism for testing the air tightness of the ion exchange membrane, the plugging mechanism comprising a support assembly, a lower sealing plate (14) being fixed to the support assembly, a sinking platform being arranged on the lower sealing plate (14), an air outlet pipe (141) being connected to the sinking platform being arranged on the side wall of the lower sealing plate (14), a sealing gasket (15) being arranged on the lower sealing plate (14) around the sinking platform, an upper sealing plate (16) being arranged on the upper side of the lower sealing plate (14), an annular air passage (161) being opened on the upper sealing plate (16) at a position corresponding to the sinking platform, and two gaskets (161) being arranged on both sides of the upper sealing plate (16). An air inlet pipe (162) and an air outlet pipe (163) are connected to the annular air passage (161), a valve body is installed on the air outlet pipe (163), a blocking component is provided on the support component for driving the upper sealing plate (16) to move toward the lower sealing plate (14) for sealing, the detection mechanism comprises a gas tank (21) connected to the air inlet pipe (162), a pressure gauge (22) and a pressure reducing valve (24) are installed on the gas tank (21), a connecting pipe (23) is provided between the pressure reducing valve (24) and the air inlet pipe (162), an adjusting component is provided on the connecting pipe (23), and a water column (3) with scale lines on the surface is connected to the air outlet pipe (141).

2. The device for testing the air tightness of ion exchange membranes under different humidity conditions according to claim 1, characterized in that: The support assembly comprises a bottom plate (11), a column (12) is fixed to the upper end of the bottom plate (11), a top plate (13) is fixed to the upper end of the column (12), the top plate (13) is connected to the blocking assembly, and the lower sealing plate (14) is fixed to the upper end of the bottom plate (11).

3. The device for testing the air tightness of ion exchange membranes under different humidity conditions according to claim 2, characterized in that: The blocking assembly comprises a mounting frame (131) fixed to the upper end of the top plate (13); a vertical shaft (101) is rotatably mounted on the mounting frame (131); a driving bevel gear (102) is fixed to the lower end of the vertical shaft (101); a connecting assembly is arranged around the driving bevel gear (102); the connecting assembly comprises a lead screw (104); a transmission bevel gear (103) meshing with the driving bevel gear (102) is arranged at one end of the lead screw (104); a sliding seat (105) is arranged on the lead screw (104); a connecting rod (106) is arranged at the lower side of the sliding seat (105); the lower end of the connecting rod (106) is rotatably connected to the upper sealing plate (16) via a pin shaft; a worm wheel (107) is fixed to the vertical shaft (101); a worm (108) meshes with one side of the worm wheel (107); and a servo motor (109) is arranged at one end of the worm (108).

4. The device for testing the air tightness of ion exchange membranes under different humidity conditions according to claim 3, characterized in that: The connecting assembly is provided at four locations, the lead screw (104) is rotatably connected to the top plate (13), a through slot is provided on the top plate (13) for the sliding seat (105) to pass through, the sliding seat (105) is threadedly connected to the lead screw (104), the connecting rod (106) is rotatably connected to the sliding seat (105) via a pin shaft, and the lead screw (104) is rotatably connected to the top plate (13).

5. The device for testing the air tightness of ion exchange membranes under different humidity conditions according to claim 1, characterized in that: The regulating component comprises a three-way valve (26) arranged on the connecting pipe (23), and the three-way valve (26) is connected to a humidifier (25).

6. The device for testing the air tightness of ion exchange membranes under different humidity conditions according to claim 1, characterized in that: The material of the lower sealing plate (14) and the upper sealing plate (16) is any one of stainless steel, graphite plate, polypropylene plate or polyethylene plate.

7. The device for testing the air tightness of ion exchange membranes under different humidity conditions according to claim 1, characterized in that: The material of the sealing gasket (15) is polytetrafluoroethylene, silicone rubber, fluororubber or asbestos.

8. The device for testing the air tightness of ion exchange membranes under different humidity conditions according to claim 1, characterized in that: The gas in the gas tank (21) is any one of nitrogen, air, oxygen, hydrogen or helium.

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