Ion exchange membrane leakage point detection device

Abstract

The utility model relates to the field of detection, in particular to an ion exchange membrane leakage point detection device which comprises a base, an ion membrane and an upper plate frame which are sequentially arranged from top to bottom, and the upper plate frame is matched with the base to press and fix the edge of the ion membrane; a seat body of the base and the ionic membrane are enclosed to form a closed air inflation cavity for air injection, and a frame body of the upper plate frame and the ionic membrane are enclosed to form a liquid injection cavity. According to the utility model, rapid and automatic leakage point detection of the ion exchange membrane is realized.

Description

Technical Field

[0001] The utility model relates to the field of detection, in particular to a leakage point detection device for an ion exchange membrane. Background Technique

[0002] An ion exchange membrane is a polymer membrane containing ionic groups and having selective permeability to ions in a solution. Since it is mainly utilized for its ion selective permeability during application, it is also called an ion selective permeable membrane. Under the action of a direct current electric field, by utilizing the selective permeability of the ion exchange membrane, charged ions penetrate through the ion exchange membrane and migrate directionally, separating from an aqueous solution and other uncharged components, thereby achieving the purposes of concentrating, desalinating, refining, and purifying the solution.

[0003] Before the ion exchange membrane is used, it is necessary to check whether there are leakage points on the surface of the ion membrane. The existing leakage point detection for the ion membrane mainly relies on the following means: 1. Apply a light source on one side of the ion exchange membrane, and visually observe through a magnifying glass on the other side of the ion exchange membrane to check for leakage points. 2. Spray water or wet the lower surface of the ion exchange membrane, lay dry paper towels on the upper surface of the ion exchange membrane, and visually observe whether there are wet spots on the paper towels. The above-mentioned leakage point detection means mainly require manual visual inspection, with low efficiency and prone to missed detection, so it needs to be solved urgently. Content of the Utility Model

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a leakage point detection device for an ion exchange membrane. The utility model realizes rapid and automatic leakage point detection of the ion exchange membrane.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A leakage point detection device for an ion exchange membrane, comprising a base, an ion membrane, and an upper plate frame arranged in sequence from top to bottom. The upper plate frame cooperates with the base to tightly press and fix the edge of the ion membrane; a sealed and air-injectable inflation cavity is formed by enclosing between the seat body of the base and the ion membrane, and a liquid injection cavity is formed by enclosing between the frame body of the upper plate frame and the ion membrane.

[0007] As a further scheme of the utility model: Sealing gaskets are arranged at the contact surfaces of the upper plate frame and the base with the ion membrane.

[0008] As a still further scheme of the utility model: The inflation cavity and the liquid injection cavity are vertically corresponding in position.

[0009] As a further solution of the present utility model: At least two sets of pressing mechanisms are further provided on the base. The pressing mechanism includes a base fixed on the base and a pressing plate rotatably matched with the base through a rotating shaft. The rotating shaft is arranged outside the base and is parallel to the axis of the base. The pressing plate is fixed on the piston rod of the pressing cylinder and is driven by the pressing cylinder to apply a pressing force towards the base on the upper plate frame.

[0010] As a further solution of the present utility model: An air inlet nozzle communicating with the inflation chamber is provided on the base. A flow divider is provided at the inlet of the air inlet nozzle. A main air passage communicating with the inflation chamber and a branch air passage communicating with the working chamber of the pressing cylinder through a trachea are provided on the flow divider. The air source is communicated with the main air passage and the branch air passage of the flow divider; A cylinder pressure relief valve for discharging the gas in the working chamber is provided on the pressing cylinder.

[0011] As a further solution of the present utility model: An inflation chamber pressure relief valve for discharging pressure outwards is provided on the air inlet nozzle.

[0012] As a further solution of the present utility model: The cylinder block of the pressing cylinder is fixed on the rotating shaft; There are two sets of pressing mechanisms, which are arranged symmetrically on the left and right sides of the base.

[0013] As a further solution of the present utility model: An elastic buffer pad is provided at the contact surface between the pressing plate and the upper plate frame.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. After injecting water into the liquid injection chamber in advance in the present utility model and then injecting gas into the inflation chamber, when the air pressure in the inflation chamber rises, a pressure difference is formed on both sides of the ion membrane. By observing whether there are bubbles on the water surface, it can be judged whether there is a leakage point phenomenon, realizing the rapid and automatic leakage point detection of the ion exchange membrane.

[0016] 2. Through the pressing of multiple sets of pressing mechanisms in the present utility model, it is avoided that the upper plate frame is lifted when the air pressure in the inflation chamber is too high, ensuring the stability of the clamping of the ion membrane during the detection process; When replacing different ion membranes to be detected, by rotating the cylinder block through the rotating shaft to stagger its vertical position with the upper plate frame, the upper plate frame can be taken out and the ion membrane can be replaced. After the replacement is completed, rotate the cylinder block to reset it, and press the pressing plate down again to press the upper plate frame tightly on the base and continue the detection test.

[0017] 3. While the air pressure in the inflation chamber of the present utility model rises, the air pressure in the working chamber of the pressing cylinder also rises, driving the pressing plate to descend, increasing the pressing force of the pressing plate on the upper plate frame, improving the stability of the clamping of the ion membrane through synchronous pressure input, and avoiding the upper plate frame from being lifted. Description of the Drawings

[0018] Figure 1This is a schematic structural diagram of the present utility model.

[0019] In the figure:

[0020] 1. Base; 11. Inflatable cavity; 12. Air inlet nozzle; 121. Shunt; 122. Inflatable cavity pressure relief valve;

[0021] 2. Upper plate frame; 3. Sealing gasket; 4. Ion membrane;

[0022] 5. Pressing mechanism; 51. Base; 52. Cylinder seat; 53. Rotating shaft;

[0023] 54. Pressing cylinder; 541. Piston rod; 542. Cylinder pressure relief valve; 55. Pressing plate; 56. Air pipe. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0025] Please refer to Figure 1 , in the embodiment of the present utility model, an ion exchange membrane leak point detection device includes a base 1, an ion membrane 4, and an upper plate frame 2 arranged in sequence from top to bottom. The base 1, the ion membrane 4, and the upper plate frame 2. A notch is coaxially opened at the top of the base 1. The ion membrane 4 is laid on the surface of the base 1 and encloses an inflatable cavity 11 with the base 1. An outward-turned edge structure is provided on the outer circle of the top of the base 1 to increase the contact area with the ion membrane 4, and a pressing mechanism 5 is provided at the bottom of the outward-turned edge of the base 1.

[0026] The shape of the upper plate frame 2 corresponds to that of the outward-turned edge of the base 1, and the ion membrane 4 is clamped and fixed through the cooperation of the upper plate frame 2 and the base 1. Sealing gaskets 3 are provided at the contact surfaces between the upper plate frame 2 and the ion membrane 4 and between the base 1 and the ion membrane 4. A liquid injection cavity is enclosed between the inner frame of the upper plate frame 2 and the ion membrane 4 for observing the leak point position after injecting water.

[0027] The number of the pressing mechanisms 5 is not limited, and the pressing mechanisms 5 are evenly arranged circumferentially around the base 1. The number of the pressing mechanisms 5 is preferably two groups, and they are symmetrically arranged on both sides of the base 1.

[0028] The pressing mechanism 5 includes a base 51 fixed to the bottom of the flanging on the outside of the base 1. A rotating shaft 53 which is staggered with the base 1 in position is installed on the base 51. The rotation axis of the rotating shaft 53 and the axis of the base 1 are arranged parallel to each other. A cylinder seat 52 is installed at the top of the rotating shaft 53. The pressing cylinder 54 on the cylinder seat 52 is arranged vertically, and a pressing plate 55 parallel to the plate surface of the upper plate frame 2 is fixed on the piston rod 541 of the pressing cylinder 54.

[0029] When replacing different ion exchange membranes 4 to be detected, rotate the cylinder seat 52 to make it stagger with the upper plate frame 2 in the vertical position, so as to facilitate the disassembly of the upper plate frame 2 to replace the ion exchange membrane 4. After the replacement is completed, rotate the cylinder seat 52 to reset it, and press down the pressing plate 55 again to press the upper plate frame 2 against the base 1.

[0030] An air inlet nozzle 12 is axially arranged at the bottom of the base 1. A shunt 121 connected to the air source is arranged at the inlet of the air inlet nozzle 12. A main air path and a branch air path are arranged on the shunt 121. The main air path is communicated with the inflation cavity 11, and the branch air path is communicated with the working cavities of the respective pressing cylinders 54 through an air pipe 56. When the air source injects air through the air inlet nozzle 12, the air pressure in the inflation cavity 11 rises, and a pressure difference is formed on both sides of the ion exchange membrane 4. After injecting water into the liquid injection cavity in advance, by observing whether there are bubbles on the water surface, it can be judged whether there is a leakage point phenomenon. While the air pressure in the inflation cavity 11 rises, the air pressure in the working cavity of the pressing cylinder 54 also rises, driving the pressing plate 55 to descend, increasing the pressing force of the pressing plate 55 on the upper plate frame 2, and improving the clamping stability of the ion exchange membrane 4 through synchronous pressure input, avoiding the upper plate frame 2 from being lifted.

[0031] A cylinder pressure relief valve 542 is arranged on the pressing cylinder 54, and an inflation cavity pressure relief valve 122 is arranged on the air inlet nozzle 12. After the detection is completed, the working cavity of the pressing cylinder 54 and the inflation cavity 11 are depressurized to facilitate the removal of the upper plate frame 2 and the ion exchange membrane 4, and facilitate the next test.

[0032] The basic principle of the present application has been described above in combination with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purpose of illustration and easy understanding, rather than limitations, and the above details do not limit the present application to necessarily adopt the above specific details to implement.

[0033] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including," "comprising," "having," etc. are open-ended terms that mean "including but not limited to" and can be used interchangeably with each other. The word "or" and "and" used herein refer to the phrase "and / or" and can be used interchangeably with it, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to" and can be used interchangeably with it.

Claims

1. An ion exchange membrane leakage detection device, characterized in that: The invention comprises a base (1), an ion membrane (4) and an upper plate frame (2) which are arranged in sequence from top to bottom. The upper plate frame (2) cooperates with the base (1) to press and fix the edge of the ion membrane (4); a closed gas-filled cavity (11) for gas injection is formed between the base body of the base (1) and the ion membrane (4); and a liquid injection cavity is formed between the frame body of the upper plate frame (2) and the ion membrane (4).

2. An ion exchange membrane leakage detection device according to claim 1, characterized in that: Sealing pads (3) are provided at the contact surfaces of the upper plate frame (2) and the base (1) and the ion membrane (4).

3. An ion exchange membrane leakage detection device according to claim 1, characterized in that: The inflation cavity (11) and the liquid injection cavity correspond to each other in the vertical direction.

4. An ion exchange membrane leakage detection device according to any one of claims 1 to 3, characterized in that: At least two sets of clamping mechanisms (5) are also provided on the base (1). The clamping mechanisms (5) include a base (51) fixed on the base (1) and a pressure plate (55) rotatably matched with the base (51) via a rotating shaft (53). The rotating shaft (53) is arranged outside the base (1) and parallel to the axis of the base (1). The pressure plate (55) is fixed on the piston rod (541) of the clamping cylinder (54) and is driven by the clamping cylinder (54) to apply a clamping force to the upper plate frame (2) in the direction of the base (1).

5. An ion exchange membrane leakage detection device according to claim 4, characterized in that: An air inlet nozzle (12) connected to the air charging chamber (11) is arranged on the base (1), a flow divider (121) is arranged at the entrance of the air inlet nozzle (12), a main air path connected to the air charging chamber (11) and a branch air path connected to the working chamber of the pressing cylinder (54) through an air pipe (56) are arranged on the flow divider (121), and an air source is connected to the main air path and the branch air path of the flow divider (121); and a cylinder pressure relief valve (542) for discharging gas in the working chamber is arranged on the pressing cylinder (54).

6. An ion exchange membrane leakage detection device according to claim 5, characterized in that: The air inlet nozzle (12) is provided with an air-filling chamber pressure relief valve (122) for releasing pressure to the outside.

7. An ion exchange membrane leakage detection device according to claim 4, characterized in that: The cylinder seat (52) of the pressing cylinder (54) is fixed on the rotating shaft (53); the pressing mechanism (5) is provided with two groups, which are arranged symmetrically on both sides of the base (1).

8. An ion exchange membrane leakage detection device according to claim 1, characterized in that: An elastic buffer pad is provided at the contact surface between the pressing plate (55) and the upper plate frame (2).

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