Residual chlorine detection device

Abstract

The utility model discloses a residual chlorine detection device which comprises a shell internally provided with a liquid flow channel, and a liquid inlet and a liquid outlet which are communicated with the liquid flow channel are formed in the shell; a residual chlorine sensor is mounted in the liquid flow channel, the upper end of the residual chlorine sensor is hermetically connected with the liquid flow channel and then extends out of the shell, and the lower end of the residual chlorine sensor is arranged towards the liquid inlet; a platinum wire electrode is mounted at the lower end of the residual chlorine sensor and is vertically arranged, and the lower end of the platinum wire electrode is spiral; the residual chlorine sensor is further detachably provided with a flow guide cover with the lower end connected with the liquid flow channel in a sealed mode, the platinum wire electrode is located in the flow guide cover, a plurality of grinding balls are arranged in the flow guide cover, and a plurality of vertical flow guide holes and radial flow guide holes are formed in the side, facing the liquid inlet, of the flow guide cover and the periphery of the flow guide cover respectively. The diameter of the vertical flow guide hole and the diameter of the radial flow guide hole are both smaller than the diameter of the grinding ball. And the polishing ball can continuously impact the platinum wire electrode under the disturbance of liquid after the liquid is introduced from the liquid inlet.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a residual chlorine detection device. Background Technology

[0002] Residual chlorine refers to the amount of chlorine remaining in water after it has been partially consumed by bacteria, microorganisms, organic matter, and inorganic matter. If the residual chlorine in water exceeds the normal range, it can cause serious harm to humans and the environment. Therefore, residual chlorine content is an important indicator in water hygiene standards, and accurate measurement of residual chlorine in water is essential.

[0003] Currently, residual chlorine detection devices mainly include a flow cell and a platinum ring electrode disposed within the flow cell. The platinum ring electrode is placed within the flow channel of the flow cell and fitted onto a detection column. After prolonged use, many impurities accumulate on the surface of the platinum ring electrode, causing changes in the electrode output signal and further leading to inaccurate detection results. To address these issues, Chinese Patent Application No. 2017212037260 discloses a residual chlorine detection device, including a flow cell, a residual chlorine electrode, a compensation electrode, an adjustment switch, an inlet connector, an outlet connector, and a residual chlorine electrode cleaning structure. The residual chlorine electrode cleaning structure includes a first baffle, a second baffle, and multiple cleaning beads. The first and second baffles are installed within the first flow channel and are located on the upper and lower sides of the residual chlorine electrode, respectively. Multiple through holes are formed on both the first and second baffles, and the size of the cleaning beads is larger than the size of the through holes on the first and second baffles. In application, the cleaning beads move towards the platinum ring electrode of the residual chlorine electrode under the action of water flow, and roll between the first and second baffles to polish the platinum ring electrode, thus achieving self-cleaning.

[0004] While the above structure can achieve polishing of the platinum ring electrode, the platinum ring is annular, making it difficult to polish the side near the upper baffle, creating a cleaning dead zone. Furthermore, the cleaning space formed by the first and second baffles is generally rectangular, resulting in less disturbance when water flows through and less impact force at a constant flow rate, leading to less than ideal polishing results. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a residual chlorine detection device that solves the problem that there are dead corners in the cleaning of platinum electrodes in the existing residual chlorine detection devices and the cleaning effect is not good.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A residual chlorine detection device includes a housing with an internal liquid flow channel, an inlet and an outlet connected to the liquid flow channel on the housing; a residual chlorine sensor is installed inside the liquid flow channel, the upper end of the residual chlorine sensor is sealed to the liquid flow channel and extends out of the housing, and the lower end is positioned facing the inlet; a platinum wire electrode is installed at the lower end of the residual chlorine sensor, the platinum wire electrode is vertically positioned and the lower end is spirally shaped; a flow guide shroud, whose lower end is sealed to the liquid flow channel, can also be detachably installed on the residual chlorine sensor, the platinum wire electrode is located inside the flow guide shroud, and multiple grinding balls are provided inside the flow guide shroud; multiple vertical flow guide holes and radial flow guide holes are respectively provided on the side of the flow guide shroud facing the liquid inlet and around the flow guide shroud, the diameter of the vertical flow guide holes and radial flow guide holes is smaller than the diameter of the grinding balls; the grinding balls can continuously impact the platinum wire electrode under the disturbance of the liquid after liquid is introduced into the liquid inlet; there is a gap between the flow guide shroud and the liquid flow channel, and the gap is connected to the outlet. In this way, after external liquid is introduced through the inlet, it flows through the liquid channel into the guide shroud, impacting and disturbing the grinding balls inside. The grinding balls continuously impact the platinum wire electrode, grinding it. The platinum wire electrode, being strip-shaped, is entirely exposed within the movement space of the grinding balls, with no obstructions, ensuring thorough grinding and excellent cleaning. This results in a surface free of deposits on the platinum wire electrode, leading to more accurate and stable detection results. Furthermore, placing the grinding balls inside the guide shroud, along with vertical and radial guide holes for water flow, confines the grinding balls within the space between the guide shroud and the residual chlorine sensor detection end without affecting water flow. During detection, external water first enters the liquid channel through the inlet, then flows through the vertical guide holes into the guide shroud, and finally through the radial guide holes to the gap between the liquid channel and the guide shroud, ultimately flowing through this gap to the outlet.

[0008] Furthermore, an inlet connector and an outlet connector are respectively installed at the inlet and outlet. The inlet is located at the lower end of the housing, and the outlet is located in the middle of one side of the housing. Thus, with the inlet connector installed, external liquid can enter the inlet and liquid flow channel through this connector. Positioning the inlet connector at the lower end of the housing and the outlet connector in the middle of the side of the housing results in a shorter overall liquid flow path, effectively reducing the size of the residual chlorine detection device.

[0009] Furthermore, the flow guide includes a barrel-shaped cover and a connecting cylinder integrally formed with the cover. The upper end of the cover is fitted onto the residual chlorine sensor and connected to the sensor's detection end via a thread, forming a residual chlorine detection space. The vertical flow guide hole is located on the bottom surface of the cover and communicates with the hollow part of the connecting cylinder. The diameter of the connecting cylinder is smaller than the diameter of the cover and is sealed to the corresponding section of the liquid flow channel. Thus, the upper end of the flow guide is threaded to the detection end of the residual chlorine sensor, resulting in a stable connection structure. The lower end of the flow guide is equipped with a connecting cylinder, which is sealed to the liquid flow channel. This ensures that after the cover is connected to the residual chlorine detection end, the interior of the cover can only communicate with the liquid inlet through the connecting cylinder and the vertical flow guide hole, guiding the liquid flow and ensuring stable liquid pressure entering the flow guide, providing sufficient impact and disturbance to the grinding ball.

[0010] Furthermore, the lower end of the residual chlorine detection space is conical. By making the lower end of the residual chlorine detection space conical, when liquid enters the space, the conical surface guides the grinding ball at the bottom of the space, allowing it to quickly reach the platinum wire electrode above and grind the platinum wire electrode. Additionally, by making this section conical, the space gradually increases after the liquid passes through the vertical guide holes, creating vortices and further agitating the grinding ball.

[0011] Furthermore, a sealing ring is embedded in the middle of the connecting cylinder. This sealing ring effectively ensures a sealed connection between the connecting cylinder and the liquid flow channel.

[0012] Furthermore, both the housing and the air deflector are transparent. This allows inspectors to easily observe the interior of the housing, understand its internal condition, and perform timely maintenance.

[0013] Furthermore, the grinding ball can be a solid or hollow sphere, made of zirconium oxide or quartz. This means the grinding ball, made of metal, has high overall strength and can withstand prolonged grinding. Hollow spheres offer greater buoyancy and are suitable for detection at lower flow rates, while solid spheres are suitable for residual chlorine detection in liquids with higher flow rates. Attached Figure Description

[0014] Figure 1 As shown in the example;

[0015] Figure 2 As shown in the example;

[0016] Figure 3 As shown in the example. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figures 1-3As shown, this embodiment provides a residual chlorine detection device, including a housing 1 with an internal liquid flow channel 11 (the liquid flow channel 11 is vertically arranged), an inlet 12 and an outlet 13 connected to the liquid flow channel 11 on the housing 1; an inlet connector 5 and an outlet connector 6 are respectively installed at the inlet 12 and the outlet 13, the inlet 12 is located at the lower end of the housing 1, and the outlet 13 is located in the middle of one side of the housing 1; a residual chlorine sensor 2 is installed in the liquid flow channel 11, the upper end of the residual chlorine sensor 2 is sealed to the liquid flow channel 11 and extends out of the housing 1, and the lower end is arranged facing the inlet 12; a platinum wire electrode 21 is installed at the lower end of the residual chlorine sensor 2, and the platinum wire electrode 21 is vertically arranged. The lower end is spirally bent; a flow guide shroud 3 with its lower end sealed to the liquid flow channel 11 can also be detachably installed on the residual chlorine sensor 2. The platinum wire electrode 21 is located inside the flow guide shroud 3. Multiple polishing balls 4 are provided inside the flow guide shroud 3. Multiple vertical flow guide holes 311 are provided on the side of the flow guide shroud 3 facing the liquid inlet 12. Multiple radial flow guide holes 312 are provided around the flow guide shroud 3. The diameters of the vertical flow guide holes 311 and the radial flow guide holes 312 are smaller than the diameter of the polishing balls 4. The polishing balls 4 can continuously impact the platinum wire electrode 21 under the disturbance of the liquid after the liquid is introduced into the liquid inlet 12. There is a gap 7 between the flow guide shroud 3 and the liquid flow channel 11, and the gap 7 is connected to the liquid outlet 13. In this way, after external liquid is introduced through the inlet 12, the liquid enters the flow guide shroud 3 through the liquid flow channel 11, thereby impacting and disturbing the grinding balls 4 inside the flow guide shroud 3. The grinding balls 4 continuously impact the platinum wire electrode 21, grinding the platinum wire electrode 21. Since the platinum wire electrode 21 is strip-shaped, it is completely exposed within the activity space of the grinding balls 4, with no other obstructions around it. The grinding is thorough and effective, resulting in a clean surface free of deposits, making the detection results more accurate and stable. In addition, by placing the grinding balls 4 inside the flow guide shroud 3 and providing vertical flow guide holes 311 and radial flow guide holes 312 for water flow through the flow guide shroud 3, the grinding balls 4 can be confined within the space between the flow guide shroud 3 and the detection end of the residual chlorine sensor 2 without affecting the water flow. During testing, external water first enters the liquid channel 11 through the inlet 12, then enters the guide shroud 3 through the vertical guide hole 311, and then flows through the radial guide hole 312 to the gap between the liquid channel 11 and the guide shroud 3, finally flowing to the outlet 13 through this gap. In practice, the number and weight of the grinding balls 4 need to be adjusted in real time according to the fluid flow rate.

[0020] like Figure 3As shown, the flow guide hood 3 includes a barrel-shaped hood 31 and a connecting cylinder 32 integrally formed with the hood 31 and connected to the lower part of the hood 31; the upper end of the hood 31 is fitted onto the residual chlorine sensor 2 and is connected to the detection end of the residual chlorine sensor 2 by a thread (i.e., the inner wall of the upper end of the hood 31 is provided with an internal thread, and the upper end of the detection end of the residual chlorine sensor 2 is provided with an external thread that matches the internal thread on the hood 31), forming a residual chlorine detection space; the vertical flow guide hole 311 is provided on the bottom surface of the hood 31 and is connected to the hollow part of the connecting cylinder 32; the diameter of the connecting cylinder 32 is smaller than the diameter of the hood 31 and is sealed to the corresponding section of the liquid flow channel 11. In this way, the upper end of the cover 31 of the flow guide hood 3 is threadedly connected to the detection end of the residual chlorine sensor 2, and the connection structure is stable. The lower end of the flow guide hood 3 is provided with a connecting cylinder 32, which is sealed to the liquid flow channel 11 through the connecting cylinder 32. Thus, after the cover 31 is connected to the residual chlorine detection end, the inside of the cover 31 can only communicate with the liquid inlet 12 through the connecting cylinder 32 and the vertical flow guide hole 311 to guide the liquid flow and ensure that the liquid pressure entering the flow guide hood 3 is stable, so as to have sufficient impact force and disturbance to the grinding ball 4.

[0021] In specific implementation, the cover 31 and the detection end of the residual chlorine sensor 2 can also be connected by a clamping structure. Before assembling the residual chlorine sensor 2, the flow guide 3 is connected and fixed to the residual chlorine sensor 2, and then the residual chlorine sensor 2 is sealed and installed on the housing 1. The upper end of the liquid flow channel 11 is sealed and connected to the residual chlorine sensor 2, and the width of the lower end is greater than the width of the detection end of the residual chlorine sensor 2. The diameter of the cover 31 of the flow guide 3 is smaller than the diameter of the corresponding section of the liquid flow channel 11, forming the gap.

[0022] The vertical guide holes 311 are arranged in multiple rows on the cover 31, with the spacing between adjacent rows of guide holes 311 being consistent. The center lines of the vertical guide holes 3111 are vertically arranged, while the center lines of the radial guide holes 312 are parallel to the radius line of the cover 31, i.e., radially arranged. Both the vertical guide holes 3111 and the radial guide holes 312 are circular, and their number is determined according to the flow velocity.

[0023] Furthermore, the upper end of the residual chlorine detection space is cylindrical, and the lower end is conical. By making the lower end of the residual chlorine detection space conical, when liquid enters the space, the conical surface guides the grinding ball 4 at the bottom of the space, allowing it to quickly reach the platinum wire electrode 21 above and grind it. Additionally, by making this section conical, the space gradually increases after the liquid passes through the vertical guide holes 311, creating vortices and causing greater disturbance to the grinding ball 4.

[0024] Furthermore, an annular groove is provided in the middle of the connecting cylinder 32, and a sealing ring is embedded in the annular groove. In this way, the sealing ring can effectively ensure a sealed connection between the connecting cylinder 32 and the liquid flow channel 11.

[0025] In this embodiment, both the housing 1 and the air deflector 3 are transparent. This allows inspectors to easily observe the interior of the housing 1, understand its internal condition, and perform timely maintenance.

[0026] During manufacturing, the grinding ball 4 can be a solid or hollow sphere, made of metals such as zirconium oxide or quartz, or alternatively, ceramic or plastic. This means that the grinding ball 4, made of metal, has high overall strength and can withstand prolonged grinding. Hollow spheres offer greater buoyancy and are suitable for detection at lower flow rates, while solid spheres are suitable for detecting residual chlorine in liquids with higher flow rates.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A residual chlorine detection device, comprising a housing with an internal liquid flow channel, an inlet and an outlet connected to the liquid flow channel on the housing; a residual chlorine sensor installed inside the liquid flow channel, the upper end of the residual chlorine sensor being sealed to the liquid flow channel and extending out of the housing, and the lower end facing the inlet; characterized in that, A platinum wire electrode is installed at the lower end of the residual chlorine sensor. The platinum wire electrode is vertically arranged and has a spiral shape at the lower end. A flow guide shroud, which is sealed to the liquid flow channel at its lower end, can also be detachably installed on the residual chlorine sensor. The platinum wire electrode is located inside the flow guide shroud. Multiple grinding balls are provided inside the flow guide shroud. Multiple vertical and radial flow guide holes are provided on the side of the flow guide shroud facing the liquid inlet and around the flow guide shroud. The diameter of the vertical and radial flow guide holes is smaller than the diameter of the grinding balls. The grinding balls can continuously impact the platinum wire electrode under the disturbance of the liquid after the liquid is introduced into the liquid inlet. There is a gap between the flow guide shroud and the liquid flow channel, and this gap is connected to the liquid outlet.

2. The residual chlorine detection device according to claim 1, characterized in that, An inlet connector and an outlet connector are respectively installed at the inlet and outlet. The inlet is located at the lower end of the housing, and the outlet is located in the middle of one side of the housing.

3. The residual chlorine detection device according to claim 1 or 2, characterized in that, The flow guide includes a barrel-shaped cover and a connecting cylinder integrally formed with the cover and connected to the lower part of the cover; the upper end of the cover is fitted onto the residual chlorine sensor and connected to the detection end of the residual chlorine sensor by threads to form a residual chlorine detection space; the vertical flow guide hole is provided on the bottom surface of the cover and communicates with the hollow part of the connecting cylinder; the diameter of the connecting cylinder is smaller than the diameter of the cover and is sealed to the corresponding liquid flow channel.

4. The residual chlorine detection device according to claim 3, characterized in that, The lower end of the residual chlorine detection space is conical.

5. The residual chlorine detection device according to claim 3, characterized in that, A sealing ring is embedded in the middle of the connecting cylinder.

6. The residual chlorine detection device according to claim 1, 2, 4, or 5, characterized in that, Both the housing and the air deflector are transparent.

7. The residual chlorine detection device according to claim 6, characterized in that, The polishing ball is a solid or hollow ball, made of zirconium oxide or quartz.

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