An easy-to-maintain resin-filled electrochemical suppressor

Abstract

The present invention discloses an easy-to-maintain resin-filled electrochemical suppressor, comprising a pressing plate A, an electrode sheet A with an electrode connection line, an ion exchange membrane A, a straight-through middle plate, an ion exchange membrane B, an electrode sheet B with an electrode connection line, a pressing plate B, a sieve plate A, an adapter A, a sieve plate B and an adapter B. The pressing plate A, the electrode sheet A, the ion exchange membrane A, the straight-through middle plate, the ion exchange membrane B, the electrode sheet B with an electrode connection line and the pressing plate B are assembled from top to bottom, and round heads are respectively provided at both ends of the straight-through middle plate. The present invention provides a straight-through eluent passage while integrating the sieve plate at the flow path joint, completely eliminating the possibility of the sieve plate falling off due to resin shrinkage, excessive eluent flow rate or vibration, and can also regularly replace the sieve plate and prevent the possibility of the middle plate breaking caused by tightening the joint forcefully, thereby improving the life and maintainability of the resin-filled suppressor.

Description

Technical Field

[0001] The invention relates to the technical field of ion chromatography equipment, and in particular to an easy-to-maintain resin-filled electrochemical suppressor. Background Art

[0002] With the continuous development of ion chromatography technology, ion chromatography has become the main detection method for anion and some cation detection. The emergence of electrochemical suppressors has made a breakthrough in the detection sensitivity and application range of ion chromatography, and also reduced the complexity of the operation of ion chromatographs. Electrochemical suppressors have become the key core components of ion chromatographs. At the same time, due to the complex technology and high production cost, electrochemical suppressors are one of the main consumables of ion chromatographs. With the continuous innovation and development of technology. Electrochemical suppressors have also developed different types, such as micro-membrane electrochemical suppressors, resin-filled suppressors, etc. Because resin-filled electrochemical suppressors have the characteristics of small dead volume and small peak diffusion, they are widely used. At present, the two most common designs of the middle plate of the filled electrochemical suppressor in the market are the straight-through eluent passage design and the right-angle eluent passage design. Among them, the straight-through eluent passage design is more widely used because its eluent passage design avoids the shortcomings of larger dead volume, smaller separation and baseline noise caused by the change of liquid flow direction. However, due to the limitations of the structure of the electrochemical suppressor, the design is limited. Failures are prone to occur during use, such as the resin isolation screen falling off, resulting in resin loss and damage to the suppressor; screen blockage, resulting in suppressor leakage and damage to the conductivity detector; excessive force when tightening the joint, resulting in the breakage of the middle plate and damage to the suppressor. Once the suppressor is damaged, it will not only delay the analysis and inspection work, but also increase the cost of using the ion chromatograph and the risk of normal detection work. Summary of the invention

[0003] The object of the present invention is to provide an easy-to-maintain resin-filled electrochemical suppressor to solve one or more of the above-mentioned prior art problems.

[0004] An easy-to-maintain resin-filled electrochemical suppressor according to the present invention comprises a pressing plate A, an electrode sheet A with electrode outlet wires, an ion exchange membrane A, a straight-through middle plate, an ion exchange membrane B, an electrode sheet B with electrode outlet wires, a pressing plate B, a sieve plate A, an adapter A, a sieve plate B and an adapter B. The pressing plate A, the electrode sheet A, the ion exchange membrane A, the straight-through middle plate, the ion exchange membrane B, the electrode sheet B with electrode outlet wires and the pressing plate B are assembled from top to bottom, and round heads are provided at both ends of the straight-through middle plate.

[0005] In some embodiments, the round heads at both ends are respectively provided with an adapter mounting hole A and an adapter mounting hole B, and the adapter mounting hole A and the adapter mounting hole B are respectively used to install adapter A and adapter B, a sieve plate A is installed between the adapter mounting hole A and the adapter A, and a sieve plate B is installed between the adapter mounting hole B and the adapter B.

[0006] In some embodiments, the adapter A has a pipe joint mounting hole A, and the pipe joint A is arranged in the pipe joint mounting hole A; the adapter B has a pipe joint mounting hole D, and the pipe joint D is arranged in the pipe joint mounting hole D.

[0007] In some embodiments, the round heads at both ends are provided with an intermediate plate slot A and an intermediate plate slot B, the pressure plate A is provided with a pressure plate boss A at both ends, and the pressure plate B is provided with a pressure plate boss B at both ends, and the intermediate plate slot A and the intermediate plate slot B are in contact with and cooperate with the pressure plate boss A and the pressure plate boss B respectively.

[0008] In some embodiments, the straight-through middle plate is provided with an middle plate slot, an middle plate liquid hole A and an middle plate liquid hole B, the middle plate slot is opened in the middle of the straight-through middle plate, the middle plate slot is shuttle-shaped, and the middle plate liquid hole A and the middle plate liquid hole B are respectively arranged in the round head.

[0009] In some embodiments, circular holes are respectively opened at the same position on the pressing plate A, the electrode sheet A with electrode lead wires, the ion exchange membrane A, the straight-through intermediate plate and the ion exchange membrane B. After each layer is stacked in sequence, it can be locked by screws and nuts.

[0010] The present invention provides an easy-to-maintain resin-filled electrochemical suppressor, which adopts a straight-through eluent passage and integrates the sieve plate at the flow path joint, completely eliminating the possibility of the sieve plate falling off due to resin shrinkage, excessive eluent flow rate or vibration. The sieve plate can also be replaced regularly and the possibility of the middle plate breaking due to forcefully tightening the joint can be avoided, thereby improving the life and maintainability of the resin-filled suppressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an easy-to-maintain resin-filled electrochemical suppressor according to an embodiment of the present invention;

[0012] Figure 2 for Figure 1 Schematic diagram of the middle side;

[0013] Figure 3 This is a schematic diagram of the installation of the screen plate of the straight-through middle plate;

[0014] Figure 4This is a schematic diagram of the location of the circular holes in the straight-through middle plate. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown in the figure, an easy-to-maintain resin-filled electrochemical suppressor includes a pressing plate A1, an electrode sheet A2 with electrode outlet wires, an ion exchange membrane A3, a straight-through middle plate 29, an ion exchange membrane B16, an electrode sheet B15 with electrode outlet wires, a pressing plate B9, a sieve plate A6, an adapter A4, a sieve plate B17 and an adapter B20. The pressing plate A1, the electrode sheet A2, the ion exchange membrane A3, the straight-through middle plate 29, the ion exchange membrane B16, the electrode sheet B15 with electrode outlet wires and the pressing plate B9 are assembled from top to bottom, and round heads 35 are provided at both ends of the straight-through middle plate 29.

[0017] The round heads 35 at both ends are respectively provided with adapter mounting holes A8 and adapter mounting holes B21, which are used to install adapter A4 and adapter B20 respectively, a sieve plate A6 is installed between adapter mounting holes A8 and adapter A4, and a sieve plate B17 is installed between adapter mounting holes B21 and adapter B20.

[0018] A pipe joint mounting hole A7 is formed in the adapter A4, a pipe joint A5 is formed in the pipe joint mounting hole A7, a pipe joint mounting hole D19 is formed in the adapter B20, a pipe joint D18 is formed in the pipe joint mounting hole D19.

[0019] like Figure 2 As shown in the figure, the round heads 35 at both ends are provided with an intermediate plate slot A30 and an intermediate plate slot B27, the pressure plate A1 is provided with a pressure plate boss A31 at both ends, and the pressure plate B9 is provided with a pressure plate boss B28 at both ends, and the intermediate plate slot A30 and the intermediate plate slot B27 are in contact with the pressure plate boss A31 and the pressure plate boss B28 respectively.

[0020] like Figure 3-4 As shown in the figure, the straight-through middle plate 29 is provided with a middle plate slot 32, a middle plate liquid hole A33 and a middle plate liquid hole B34. The middle plate slot 32 is opened in the middle of the straight-through middle plate 29, and the middle plate slot 32 is shuttle-shaped. The middle part of the straight-through middle plate 29 is a thin sheet structure, and the two ends are respectively designed with thickened round heads 35 for processing the adapter mounting hole A8 and the adapter mounting hole B21. The round heads 35 at the two ends are respectively processed with the adapter mounting hole A8 and the adapter mounting hole B21; the middle of the straight-through middle plate 29 is provided with the middle plate slot 32, the middle plate liquid hole A33 and the middle plate liquid hole B34 which can be filled with resin, and the resin filled in the above space can realize the functions of conductivity and ion migration.

[0021] There are adapter mounting holes A8 and adapter mounting holes B21 at both ends of the straight-through middle plate 29, which are used to install adapter A4 and adapter B20 respectively. Special-shaped sieve plates A6 and B17 can be installed and fixed between the straight-through middle plate 29 and adapter A4 and adapter B20 respectively; adapter mounting holes A8 and adapter mounting holes B21 and adapter A4 and adapter B20 realize low-pressure sealing of liquid through end face compression sealing. This design allows adapter A4 and adapter B20 to be directly unscrewed and old sieve plates A6 and B17 replaced and tightened when the sieve plate is blocked or contaminated, without the need to disassemble the electrochemical suppressor as a whole.

[0022] The round heads 35 at both ends of the straight-through middle plate 29 are designed with middle plate slots A30 and B27. After the suppressor is installed, they form contact and fit with the pressure plate boss A31 and the pressure plate boss B28 respectively, effectively avoiding the breakage of the straight-through middle plate 29 caused by the rotation of the round heads 35 when tightening or loosening the adapter A4 and the adapter B20.

[0023] Circular holes 36 are respectively provided at the same position on the pressing plate A1, the electrode sheet A2 with electrode lead-out wires, the ion exchange membrane A3, the straight-through intermediate plate 29 and the ion exchange membrane B16. After each layer is stacked in sequence, it can be locked by screws and nuts to achieve end face sealing of the contact surfaces of the above components to prevent liquid leakage.

[0024] The present invention provides an easy-to-maintain resin-filled electrochemical suppressor, which adopts a straight-through eluent passage and integrates the sieve plate at the flow path joint, completely eliminating the possibility of the sieve plate falling off due to resin shrinkage, excessive eluent flow rate or vibration. The sieve plate can also be replaced regularly and the possibility of the middle plate breaking due to tightening the joint forcefully can be avoided, thereby improving the life and maintainability of the resin-filled suppressor.

[0025] The usage and working principle are as follows:

[0026] 1. Place the sieve plate A6 at the adapter mounting hole A7, and install and tighten the adapter A4. In the same way, install the sieve plate B17 between the adapter mounting hole B21 and the adapter B20, and tighten the adapter B21 to complete the pre-installation of the straight-through middle plate 29.

[0027] 2. Place the electrode sheet B15 with the electrode lead wires in the electrode slot B12 of the pressing plate B9, and then stack the ion exchange membrane B16 on the pressing plate B9, aligning the circular holes 36.

[0028] 3. Place the pre-assembled straight-through intermediate plate 29 flat on the ion exchange membrane B16 and align the circular holes 36.

[0029] 4. Fill the corresponding wet ion exchange resin into the middle plate slot hole 32, the middle plate liquid hole A33, and the middle plate liquid hole B34. When filling, ensure that the resin fills the above space evenly. At the same time, use a tool to scrape off the excess resin to ensure that the resin height is consistent with the height of the straight middle plate.

[0030] 5. Place the ion exchange membrane A3 flat on the straight-through middle plate 29 filled with resin, ensuring that the circular holes 36 are aligned.

[0031] 6. Install the electrode sheet A2 with the electrode lead wires into the electrode slot A24 of the pressing plate A1, and then place the pressing plate A1 with the electrode sheet A2 with the electrode lead wires flat on the ion exchange membrane A3, ensuring that the circular holes 36 are aligned.

[0032] 7. Use screws and nuts suitable for the round holes 36 to press the pressing plate A1, ion exchange membrane A3, straight-through middle plate 29, ion exchange membrane B16, and pressing plate B9 to form an electrochemical suppressor with a sandwich structure in which each contact surface is in close contact. At this point, the suppressor is assembled.

[0033] 8. Use pipe joint A5 to seal and fix the pipe at the outlet of the chromatographic column to the adapter A4 through the pipe joint mounting hole A7. Use pipe joint D18 to seal and fix the pipe at the inlet of the conductivity cell to the adapter B20 through the pipe joint mounting hole D19. Use pipe joint B11 to seal and fix the pipe at the outlet of the conductivity cell to the pressing plate B9 through the pipe joint mounting hole B10. Take a pipe with a suitable outer diameter, seal and fix one end of the pipe to the pressing plate B9 through the pipe joint mounting hole C14 with pipe joint C13, and seal and fix the other end of the pipe to the pressing plate A1 through the pipe joint mounting hole E22 with pipe joint E23. Use pipe joint F25 to seal and fix one end of the waste liquid pipe to the pressing plate A1 through the pipe joint mounting hole F26. The other end of the waste liquid pipe goes directly to the waste liquid bottle. At this point, the connection of the liquid flow path is completed.

[0034] 9. Connect the electrode lead of electrode sheet A2 to the negative electrode of the constant current source, and connect the electrode lead of electrode sheet B15 to the positive electrode of the constant current source. Now the constant current source connection of the electrochemical suppressor is completed and the electrochemical suppressor can be used normally.

[0035] 10. When the sieve plate A6 and sieve plate B17 need to be maintained or replaced, just unscrew the corresponding adapter A4 or adapter B20, take out the old sieve plate, put in the new sieve plate and tighten it.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several similar modifications and improvements without departing from the creative concept of the present invention, and these are also considered to be within the scope of invention protection.

Claims

1. An easy-to-maintain resin-filled electrochemical suppressor, characterized in that: The invention comprises a pressing plate A (1), an electrode sheet A (2) with electrode connection wires, an ion exchange membrane A (3), a straight-through middle plate (29), an ion exchange membrane B (16), an electrode sheet B (15) with electrode connection wires, a pressing plate B (9), a sieve plate A (6), an adapter A (4), a sieve plate B (17) and an adapter B (20), wherein the pressing plate A (1), the electrode sheet A (2), the ion exchange membrane A (3), the straight-through middle plate (29), the ion exchange membrane B (16), the electrode sheet B (15) with electrode connection wires and the pressing plate B (9) are assembled from top to bottom, and circular holes (36) are respectively opened at the same position on the pressing plate A (1), the electrode sheet A (2) with electrode connection wires, the ion exchange membrane A (3), the straight-through middle plate (29) and the ion exchange membrane B (16), and after each layer is stacked in sequence, it can be locked by screws and nuts. The straight-through middle plate (29) is provided with round heads (35) at both ends; the round heads (35) at both ends are respectively provided with adapter mounting holes A (8) and adapter mounting holes B (21); the adapter mounting holes A (8) and the adapter mounting holes B (21) are respectively used to mount adapters A (4) and adapters B (20); a sieve plate A (6) is installed between the adapter mounting holes A (8) and the adapter A (4); and a sieve plate B (17) is installed between the adapter mounting holes B (21) and the adapter B (20); The round heads (35) at both ends are provided with an intermediate plate slot A (30) and an intermediate plate slot B (27), the pressure plate A (1) is provided with a pressure plate boss A (31) at both ends, and the pressure plate B (9) is provided with a pressure plate boss B (28) at both ends, and the intermediate plate slot A (30) and the intermediate plate slot B (27) are in contact with and cooperate with the pressure plate boss A (31) and the pressure plate boss B (28) respectively.

2. The easy-to-maintain resin-filled electrochemical suppressor according to claim 1, characterized in that: The adapter A (4) is provided with a pipe joint mounting hole A (7), and the pipe joint A (5) is provided in the pipe joint mounting hole A (7). The adapter B (20) is provided with a pipe joint mounting hole D (19), and the pipe joint D (18) is provided in the pipe joint mounting hole D (19).

3. The easy-to-maintain resin-filled electrochemical suppressor according to claim 1, characterized in that: The straight-through middle plate (29) is provided with a middle plate slot hole (32), a middle plate liquid hole A (33) and a middle plate liquid hole B (34); the middle plate slot hole (32) is opened in the middle of the straight-through middle plate (29); the middle plate slot hole (32) is shuttle-shaped; the middle plate liquid hole A (33) and the middle plate liquid hole B (34) are respectively arranged in the round head (35).

Images