Three-electrode electrochemical sensor

Abstract

The utility model discloses a three-electrode electrochemical sensor, which comprises a main body assembly, an electrode assembly, a first electrode assembly and a second electrode assembly, and is characterized in that the main body assembly comprises a main shell, electrodes and an upper cover; the replacing assembly comprises a shell, a second air inlet, an unwinding roller, a winding roller, a sealing bearing, a rotary knob and a breathable film. The shell is fixed to the middle of the upper surface of the upper cover, the second air inlet is formed in the middle of the upper end of the shell, the unwinding roller is rotationally connected into the shell, the winding roller is rotationally connected into the shell, and one end of the winding roller extends out of the shell. The problems that a breathable film of an air inlet of an existing three-electrode electrochemical sensor is in direct contact with air to achieve a primary filtering effect, but needs to be cleaned after long-term use, a breathable film material needs to be replaced in time after being cleaned for multiple times and is damaged, the breathable film is installed from the interior, an upper cover needs to be detached during replacement, and the cost is high are solved. The sealing performance between the main shell and the upper cover can be damaged due to the operation, and other parts can be damaged due to errors during disassembly.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental monitoring, in particular to a three-electrode electrochemical sensor. Background Art

[0002] Electrochemical sensors are widely used in air quality monitoring and can effectively detect the presence of harmful gases such as carbon monoxide, nitrogen oxides, and sulfur oxides, which is crucial for environmental protection and public health. When the three-electrode electrochemical sensor is performing air monitoring, air enters the main housing through the air inlet below the breathable membrane, and after being filtered, reacts with the electrolyte in the main housing. With the coordinated work of the three electrodes, the concentration of harmful gases in the air is obtained.

[0003] The breathable membrane at the air inlet of the existing three-electrode electrochemical sensor has a primary filtration effect because it is in direct contact with the air, but it needs to be cleaned after long-term use. After multiple cleanings, the breathable membrane material is damaged and needs to be replaced in time. The breathable membrane is installed from the inside, and the upper cover needs to be removed when replaced. This operation will damage the sealing between the main shell and the upper cover, and other components may be damaged due to errors during disassembly. Utility Model Content

[0004] The utility model aims to provide a three-electrode electrochemical sensor to solve the problem raised in the above-mentioned background technology that the breathable membrane at the air inlet of the existing three-electrode electrochemical sensor is in direct contact with the air and has a primary filtering effect, but needs to be cleaned after long-term use. After repeated cleanings, the breathable membrane material is damaged and needs to be replaced in time. The breathable membrane is installed from the inside, and the upper cover needs to be removed when replacing it. This operation will damage the sealing between the main shell and the upper cover, and other components may be damaged due to mistakes during disassembly.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a three-electrode electrochemical sensor, comprising:

[0007] A main body component, the main body component comprising a main shell, electrodes and an upper cover;

[0008] There are three electrodes, which are plugged into the lower end of the main shell, and the lower end of the upper cover is clamped on the upper end of the main shell;

[0009] A replacement assembly, the replacement assembly comprising a housing, a second air inlet, a reel, a reel, a sealing bearing, a knob and a breathable membrane;

[0010] The shell is fixed to the middle of the upper surface of the upper cover, the second air inlet is opened in the middle of the upper end of the shell, the unwinding roller is rotatably connected to the inside of the shell, the winding roller is rotatably connected to the inside of the shell, one end extends out of the shell, the unwinding roller and the winding roller are respectively located on both sides of the second air inlet, the knob is fixed to one end of the winding roller and is located outside the shell, the sealed bearing is inserted into the side of the shell and wrapped on the winding roller, and the two ends of the breathable membrane are respectively wrapped around the unwinding roller and the winding roller.

[0011] Furthermore, the main body assembly also includes a support ring and a bracket;

[0012] The support ring is fixed to the lower section inside the main shell, and the bracket is fixed to the upper end of the support ring.

[0013] Furthermore, the main body assembly also includes a filter plate and a first air inlet;

[0014] The filter plate is placed inside the bracket, and the first air inlet is opened in the middle of the upper cover and is located directly below the second air inlet.

[0015] Further, a stabilization component is included;

[0016] The stabilizing assembly includes a spring column and a connecting block;

[0017] There are four spring columns in total, the lower ends of which are fixed to the upper surface of the upper cover and are symmetrically distributed outside the first air inlet, and the lower surface of the connecting block is fixed to the upper end of the spring column.

[0018] Furthermore, the stabilizing assembly further comprises a compression frame and a connecting column;

[0019] The pressing frame is fixed between four connecting blocks, and there are four connecting columns in total, which are respectively fixed at the four corners of the upper surface of the pressing frame.

[0020] Furthermore, the stabilizing assembly further includes a connecting frame and a through hole;

[0021] There are four through holes, which are opened at the upper end of the shell and symmetrically distributed outside the second air inlet. The connecting posts are inserted into the through holes, the lower surface of the connecting frame is fixed to the upper end of the connecting posts, and the connecting frame is located at the upper end of the shell.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] 1. The utility model has a replacement component. When the breathable membrane is damaged, the knob on the outer shell can be turned to drive the winding roller to rotate, so as to reel up the damaged breathable membrane. At the same time, the unwinding roller can be driven to rotate to release a new breathable membrane to be attached to the lower part of the second air inlet. The sealed bearing can ensure the sealing between the winding roller and the outer shell. This arrangement can avoid the damage of components caused by disassembling the sensor on the one hand, and can quickly replace the breathable membrane on the other hand, saving maintenance time.

[0024] 2. The utility model provides a stabilizing component. When the breathable membrane needs to be replaced, the connecting frame is pressed down by one hand to drive the connecting column to move downward along the through hole, and the pressing frame on the connecting block to move downward to separate the pressing frame from the breathable membrane. The other hand turns the knob to replace the new breathable membrane, and then the connecting frame is released. Under the action of the spring column, the connecting block drives the pressing frame to firmly press the breathable membrane against the inner top surface of the shell. This arrangement can, on the one hand, prevent the rotation of the knob due to external force after replacement, causing the breathable membrane to move, and on the other hand, it can achieve a sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are 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 creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the interior of the main housing of the utility model;

[0028] Figure 3 This is a schematic diagram of the shell structure of the utility model;

[0029] Figure 4 This is a schematic diagram of the replacement component structure of the utility model;

[0030] Figure 5 It is a schematic diagram of the structure of the stabilizing component of the utility model.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 10. Main shell; 11. Electrode; 12. Support ring; 13. Bracket; 14. Filter plate; 15. Upper cover; 16. First air inlet; 20. Outer shell; 21. Second air inlet; 22. Unwinding roller; 23. Winding roller; 24. Sealed bearing; 25. Knob; 26. Breathable membrane; 30. Spring column; 31. Connecting block; 32. Pressing frame; 33. Connecting column; 34. Connecting frame; 35. Through hole. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0035] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See also Figure 1-4 This embodiment is a three-electrode electrochemical sensor, comprising:

[0037] The main body assembly includes a main shell 10, an electrode 11 and an upper cover 15;

[0038] There are three electrodes 11, which are plugged into the lower end of the main housing 10, and the lower end of the upper cover 15 is clamped on the upper end of the main housing 10;

[0039] The main housing 10 serves as a support and seal, the electrodes 11 are respectively a working electrode, an auxiliary electrode and a reference electrode, and the upper cover 15 serves as a seal;

[0040] A replacement component, the replacement component includes a housing 20, a second air inlet 21, an unwinding roller 22, a winding roller 23, a sealing bearing 24, a knob 25 and a breathable membrane 26;

[0041] The housing 20 is fixed to the middle of the upper surface of the upper cover 15, the second air inlet 21 is opened in the middle of the upper end of the housing 20, the unwinding roller 22 is rotatably connected to the inside of the housing 20, the winding roller 23 is rotatably connected to the inside of the housing 20, one end of which extends out of the housing 20, the unwinding roller 22 and the winding roller 23 are respectively located on both sides of the second air inlet 21, the knob 25 is fixed to one end of the winding roller 23 and is located outside the housing 20, the sealing bearing 24 is plugged into the side of the housing 20 and wrapped around the winding roller 23, and the two ends of the air-permeable membrane 26 are respectively wound around the unwinding roller 22 and the winding roller 23;

[0042] The housing 20 plays a supporting role, the second air inlet 21 facilitates air to enter the main housing 10, the unwinding roller 22 and the winding roller 23 are used to wind the breathable membrane 26, the sealing bearing 24 plays a sealing role to facilitate the rotation of the winding roller 23, the knob 25 facilitates the manual operation of the winding roller 23, and the breathable membrane 26 plays a filtering role;

[0043] The main body assembly also includes a support ring 12 and a bracket 13;

[0044] The support ring 12 is fixed to the lower section of the main housing 10, and the bracket 13 is fixed to the upper end of the support ring 12;

[0045] The support ring 12 and the bracket 13 play a supporting role;

[0046] The main assembly also includes a filter plate 14 and a first air inlet 16;

[0047] The filter plate 14 is placed inside the bracket 13, and the first air inlet 16 is opened in the middle of the upper cover 15 and is located directly below the second air inlet 21;

[0048] The filter plate 14 has a filtering effect, and the first air inlet 16 facilitates air to enter the main housing 10 .

[0049] Working principle:

[0050] When the breathable membrane 26 is damaged, the knob 25 on the housing 20 can be rotated to drive the winding roller 23 in the sealing bearing 24 to rotate, thereby winding up the damaged breathable membrane 26 and driving the unwinding roller 22 to rotate to release a new breathable membrane 26 attached to the bottom of the second air inlet 21.

[0051] This step can avoid disassembling the sensor and causing damage to parts, and can quickly replace the breathable membrane 26 to save maintenance time.

[0052] See also Figure 3 , Figure 5 This embodiment is based on the above embodiment 1 and further includes:

[0053] A stabilizing assembly, the stabilizing assembly includes a spring column 30 and a connecting block 31;

[0054] There are four spring columns 30, the lower ends of which are fixed to the upper surface of the upper cover 15 and symmetrically distributed outside the first air inlet 16, and the lower surface of the connecting block 31 is fixed to the upper end of the spring column 30;

[0055] The spring column 30 has a reset effect, and the connecting block 31 plays a connecting role;

[0056] The stabilizing assembly also includes a compression frame 32 and a connecting column 33;

[0057] The pressing frame 32 is fixed between the four connecting blocks 31, and there are four connecting columns 33, which are respectively fixed at the four corners of the upper surface of the pressing frame 32;

[0058] The pressing frame 32 plays a pressing role, and the connecting column 33 plays a connecting role;

[0059] The stabilizing assembly also includes a connecting frame 34 and a through hole 35;

[0060] There are four through holes 35, which are opened at the upper end of the housing 20 and symmetrically distributed outside the second air inlet 21. The connecting column 33 is inserted into the through hole 35, and the lower surface of the connecting frame 34 is fixed to the upper end of the connecting column 33, and the connecting frame 34 is located at the upper end of the housing 20;

[0061] The connecting frame 34 facilitates unified operation of the four connecting columns 33 , and the through holes 35 provide movable space for the connecting columns 33 and play a limiting role.

[0062] Working principle:

[0063] When the breathable membrane 26 needs to be replaced, the connecting frame 34 is pressed down by one hand to drive the connecting column 33 to move downward along the through hole 35, and the pressing frame 32 on the connecting block 31 to move downward, so that the pressing frame 32 is separated from the breathable membrane 26. The knob 25 is turned with the other hand. After replacing the new breathable membrane 26, the connecting frame 34 is loosened. Under the action of the spring column 30, the connecting block 31 drives the pressing frame 32 to firmly press the breathable membrane 26 against the top surface of the housing 20.

[0064] This step can, on the one hand, prevent the knob 25 from rotating due to external force after replacement, causing the breathable membrane 26 to move, and on the other hand, can achieve a sealing effect.

[0065] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected 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 according to specific circumstances.

[0066] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A three-electrode electrochemical sensor, characterized in that: include: A main body component, the main body component comprising a main shell (10), an electrode (11) and an upper cover (15); The electrodes (11) are in three pieces and are plugged into the lower end of the main housing (10); the lower end of the upper cover (15) is clamped onto the upper end of the main housing (10); A replacement component, the replacement component comprising a housing (20), a second air inlet (21), an unwinding roller (22), a winding roller (23), a sealing bearing (24), a knob (25), and a breathable membrane (26); The shell (20) is fixed to the middle of the upper surface of the upper cover (15); the second air inlet (21) is opened in the middle of the upper end of the shell (20); the unwinding roller (22) is rotatably connected to the inside of the shell (20); the winding roller (23) is rotatably connected to the inside of the shell (20) and one end extends out of the shell (20); the unwinding roller (22) and the winding roller (23) are respectively located on both sides of the second air inlet (21); the knob (25) is fixed to one end of the winding roller (23) and is located outside the shell (20); the sealing bearing (24) is plugged into the side of the shell (20) and wrapped around the winding roller (23); and the two ends of the air permeable membrane (26) are respectively wound around the unwinding roller (22) and the winding roller (23).

2. A three-electrode electrochemical sensor according to claim 1, characterized in that: The main body assembly further comprises a support ring (12) and a bracket (13); The support ring (12) is fixed to the lower section inside the main housing (10), and the bracket (13) is fixed to the upper end of the support ring (12).

3. A three-electrode electrochemical sensor according to claim 2, characterized in that: The main body assembly further comprises a filter plate (14) and a first air inlet (16); The filter plate (14) is placed inside the bracket (13), and the first air inlet (16) is opened in the middle of the upper cover (15) and is located directly below the second air inlet (21).

4. A three-electrode electrochemical sensor according to claim 1, characterized in that: Also included are stabilization components; The stabilizing assembly comprises a spring column (30) and a connecting block (31); There are four spring columns (30) in total, the lower ends of which are fixed to the upper surface of the upper cover (15) and are symmetrically distributed outside the first air inlet (16); the lower surface of the connecting block (31) is fixed to the upper end of the spring column (30).

5. A three-electrode electrochemical sensor according to claim 4, characterized in that: The stabilizing assembly further comprises a pressing frame (32) and a connecting column (33); The pressing frame (32) is fixed between the four connecting blocks (31), and there are four connecting columns (33) respectively fixed at the four corners of the upper surface of the pressing frame (32).

6. A three-electrode electrochemical sensor according to claim 5, characterized in that: The stabilizing assembly further comprises a connecting frame (34) and a through hole (35); There are four through holes (35) in total, which are opened at the upper end of the outer shell (20) and symmetrically distributed outside the second air inlet (21); the connecting column (33) is inserted into the through hole (35); the lower surface of the connecting frame (34) is fixed to the upper end of the connecting column (33); and the connecting frame (34) is located at the upper end of the outer shell (20).

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