An electrode-type liquid level measuring device

Abstract

This utility model relates to an electrode-type liquid level measuring device, including a blind flange and a liquid level electrode. The blind flange has a mounting hole through which the liquid level electrode passes and connects to the blind flange. The liquid level electrode includes an electrode guide rod, an insulating sleeve, and a wire. One end of the electrode guide rod is the measuring end, and the other end is the lead-out end. The insulating sleeve is fitted onto the electrode guide rod, and the wire connects to the lead-out end of the electrode guide rod. This utility model, by fitting an insulating sleeve onto the electrode guide rod, enables the liquid level electrode to resist acid and alkali corrosion, preventing structural damage due to corrosion, extending the service life of the liquid level electrode, and reducing replacement costs. Simultaneously, the insulating properties of the insulating conduit fundamentally block the misleading electrical circuit formed by the "electrode-water vapor" connection, reducing the occurrence of false full-level reports when the liquid level is below the target level.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial measurement, specifically to an electrode-type liquid level measuring device. Background Technology

[0002] Accurate liquid level measurement is a crucial task in many fields, including industrial production, environmental monitoring, and scientific research. Liquid level electrodes, as a commonly used liquid level measuring device, have gained widespread application due to their high reliability, low cost, and ease of installation and maintenance.

[0003] In conventional electrode-type level gauges, the part submerged in water is usually a conductor. Traditional electrode-type level gauges mostly use metal electrodes, which face significant challenges in domestic sewage treatment processes. Domestic sewage has a complex composition, containing not only large amounts of acidic or alkaline substances with strong corrosiveness, but also a mixture of oil, fibers, silt, and other contaminants. Under these conditions, the electrodes are highly susceptible to corrosion, and rust and peeling will gradually appear on the metal surface.

[0004] In addition, regarding the monitoring of the discharge level of domestic sewage treatment devices, domestic sewage will produce water vapor and bubbles under the influence of temperature difference. Under the condition of high density water, mist and water vapor, the electrodes are prone to forming misleading electrical alarms, resulting in incorrect judgments, which makes the qualified water discharge pump fail to stop the discharge in time or discharge prematurely. Utility Model Content

[0005] Based on the above description, this utility model provides an electrode-type liquid level measuring device. By sleeved with an insulating sleeve on the electrode guide rod, the liquid level electrode can resist acid and alkali corrosion, avoiding structural damage caused by corrosion, extending the service life of the liquid level electrode, and reducing replacement costs. At the same time, the insulating properties of the insulating conduit fundamentally block the misleading electrical circuit formed by "electrode-water vapor", reducing the occurrence of false full liquid level reports when the liquid level is not up to standard.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An electrode-type liquid level measuring device includes a blind flange and a liquid level electrode. The blind flange is provided with a mounting hole, and the liquid level electrode passes through the mounting hole and is connected to the blind flange. The liquid level electrode includes an electrode guide rod, an insulating sleeve, and a wire. One end of the electrode guide rod is a measuring end, and the other end is a lead-out end. The insulating sleeve is sleeved on the electrode guide rod, and the wire is connected to the lead-out end of the electrode guide rod.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the blind flange is provided with four liquid level electrodes, which are arranged sequentially from top to bottom, and are respectively a high liquid level measuring electrode, a medium liquid level measuring electrode, a low liquid level measuring electrode, and a common end electrode.

[0009] Furthermore, a mounting base is provided on the side of the blind flange near the lead-out end of the electrode guide rod, and the mounting base is matched with the liquid level electrode and is provided at the corresponding mounting hole; The inner wall of the mounting base is provided with a first conical surface and an internal thread. The diameter of the first conical surface gradually increases towards the lead-out end of the electrode guide rod, and the internal thread is provided on the side of the first conical surface near the lead-out end of the electrode guide rod. The electrode guide rod has a second conical surface, an external thread, and a gripping surface arranged sequentially towards the end of the lead-out end. The diameter of the second conical surface gradually increases towards the lead-out end of the electrode guide rod, and the external thread and the internal thread are detachably engaged. The first conical surface and the second conical surface are matched, and the end of the insulating sleeve near the lead-out end of the electrode rod gradually expands towards the end and is pressed between the first conical surface and the second conical surface.

[0010] Furthermore, the gripping surface is covered with an insulating element, and the insulating element covers the connection between the wire and the electrode rod.

[0011] Furthermore, the measuring end of the electrode guide rod is a third conical surface that gradually narrows towards the end, and the side of the insulating sleeve near the measuring end of the electrode guide rod gradually narrows towards the end and is pressed against the third conical surface.

[0012] Furthermore, the measuring end of the electrode rod is connected to a platinum contact, which extends from the end of the insulating sleeve.

[0013] Furthermore, a sealing ring is provided between the mounting hole and the liquid level electrode.

[0014] Furthermore, the lead-out end of the electrode rod is provided with a welding blind hole, and the end of the wire is inserted into the welding blind hole and connected to the electrode rod by welding.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. This utility model enables the liquid level electrode to resist acid and alkali corrosion by sleeved on the electrode guide rod, avoiding structural damage caused by corrosion, extending the service life of the liquid level electrode, and reducing replacement costs. The insulation characteristics of the insulating conduit fundamentally block the misleading electrical circuit formed by "electrode-water vapor", reducing the occurrence of false full liquid level reports when the liquid level is not up to standard. 2. The insulation properties of the insulated conduit fundamentally block the misleading electrical circuit formed by the "electrode-water vapor" connection, reducing the occurrence of false full-level reports when the liquid level is below the standard. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an electrode-type liquid level measuring device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection between the liquid level electrode and the blind flange in an embodiment of this utility model; Figure 3 This is a schematic diagram of the liquid level electrode in an embodiment of the present invention; Figure 4 This is a schematic diagram of the mounting base in an embodiment of the present utility model; The attached diagram lists the components represented by each number as follows: 1. Blind flange; 11. Mounting hole; 12. Mounting base; 121. First conical surface; 122. Internal thread; 13. Sealing ring; 2. Liquid level electrode; 2a. High liquid level measuring electrode; 2b. Medium liquid level measuring electrode; 2c. Low liquid level measuring electrode; 2d. Common end electrode; 21. Electrode guide rod; 211. Second conical surface; 212. External thread; 213. Grip surface; 214. Third conical surface; 215. Weld blind hole; 22. Insulating sleeve; 23. Wire; 24. Insulating component; 25. Platinum contact. Detailed Implementation

[0017] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0020] An electrode-type liquid level measuring device includes a blind flange 1 and a liquid level electrode 2. The blind flange 1 has a mounting hole 11, through which the liquid level electrode 2 passes and connects to the blind flange 1. The liquid level electrode 2 includes an electrode guide rod 21, an insulating sleeve 22, and a wire 23. One end of the electrode guide rod 21 is the measuring end, and the other end is the lead-out end. The insulating sleeve 22 is fitted onto the electrode guide rod 21, and the wire 23 connects to the lead-out end of the electrode guide rod 21. The wire 23 is used to connect to the measuring device.

[0021] In this embodiment, four liquid level electrodes 2 are provided on the blind flange 1. The four liquid level electrodes 2 are arranged from top to bottom, and from top to bottom, they are high liquid level measuring electrode 2a, medium liquid level measuring electrode 2b, low liquid level measuring electrode 2c, and common end electrode 2d.

[0022] When the liquid in the container submerges the low liquid level measuring electrode 2c and the common terminal electrode 2d, the low liquid level measuring electrode 2c and the common terminal electrode 2d are connected, and the liquid level in the container can be measured by the measuring device.

[0023] When the liquid in the container submerges the middle liquid level measuring electrode 2b, the low liquid level measuring electrode 2c, and the common terminal electrode 2d, the middle liquid level measuring electrode 2b, the low liquid level measuring electrode 2c, and the common terminal electrode 2d are all connected. At this time, the liquid in the container can be measured to be at the middle liquid level by the measuring device.

[0024] When the liquid in the container submerges the high liquid level measuring electrode 2a, the medium liquid level measuring electrode 2b, the low liquid level measuring electrode 2c, and the common terminal electrode 2d, the high liquid level measuring electrode 2a, the medium liquid level measuring electrode 2b, the low liquid level measuring electrode 2c are all connected to the common terminal electrode 2d. At this time, the liquid level in the container can be measured to be high by the measuring device.

[0025] This invention, by sleeved with an insulating sleeve 22 on the electrode guide rod 21, enables the liquid level electrode 2 to resist acid and alkali corrosion, avoids structural damage to the liquid level electrode 2 due to corrosion, extends the service life of the liquid level electrode 2, and reduces replacement costs. The insulating properties of the insulating conduit fundamentally block the misleading electrical circuit formed by "electrode-water vapor", reducing the occurrence of false full liquid level reports when the liquid level is not up to standard.

[0026] In addition, a circuit is only formed when the measuring end of the electrode rod 21 comes into contact with the liquid. The physical isolation of the insulating sleeve 22 reduces the probability of false alarms by more than 90%, which can effectively reduce the occurrence of false alarms when the liquid level is not up to standard.

[0027] Preferably, in this embodiment, the measuring end of the electrode guide rod 21 is a third conical surface 214 that gradually tapers towards the end. The insulating sleeve 22, near the measuring end of the electrode guide rod 21, gradually tapers towards the end and presses against the third conical surface 214. A platinum contact 25 is connected to the measuring end of the electrode guide rod 21, extending from the end of the insulating sleeve 22. The surface of the platinum contact 25 is polished to a roughness Ra≤0.8μm to reduce the probability of dirt adhesion. The platinum contact 25 has low surface tension, making it difficult for oil, fibers, and other dirt in sewage to adhere. In contrast, traditional metal electrodes have rough surfaces, easily forming a dirt accumulation layer, requiring manual cleaning weekly. The improved equipment can extend this to cleaning every 3 months, reducing the workload of maintenance personnel.

[0028] Meanwhile, the insulating sleeve 22 is made of PVC material with added stabilizers and anti-aging agents, giving it excellent resistance to acids, alkalis, and oxidation, effectively preventing electrode damage caused by sewage corrosion. Furthermore, the smooth outer wall of the PVC conduit makes it less prone to scaling.

[0029] The lead-out end of the electrode rod 21 is provided with a welding blind hole 215. The end of the wire 23 is inserted into the welding blind hole and connected to the electrode rod 21 by welding.

[0030] In addition, the lead-out end of the electrode rod 21 is provided with a second conical surface 211, an external thread 212, and a gripping surface 213 in sequence towards the end. The diameter of the second conical surface 211 gradually increases towards the lead-out end of the electrode rod 21. The gripping surface 213 is covered with an insulating element 24, which covers the connection between the wire 23 and the electrode rod 21, providing insulation and protection.

[0031] A sealing ring 13 is provided between the mounting hole 11 and the liquid level electrode 2.

[0032] A mounting base 12 is provided on the side of the blind flange 1 near the lead-out end of the electrode guide rod 21. The mounting base 12 is matched with the liquid level electrode 2 and is located at the corresponding mounting hole 11. The inner sidewall of the mounting base 12 is provided with a first conical surface 121 and an internal thread 122. The diameter of the first conical surface 121 gradually increases towards the lead-out end of the electrode guide rod 21, and the internal thread 122 is located on the side of the first conical surface 121 near the lead-out end of the electrode guide rod 21.

[0033] The external thread 212 and the internal thread 122 are detachably engaged. The first conical surface 121 and the second conical surface 211 are matched, and the end of the insulating sleeve 22 near the lead-out end of the electrode rod 21 gradually expands towards the end and is pressed between the first conical surface 121 and the second conical surface 211.

[0034] The liquid level electrode 2 in this embodiment is easy to disassemble and install. In addition, when installing the liquid level electrode 2, the first conical surface 121 tightens the insulating sleeve 22 by friction, which can effectively reduce the gap between the insulating sleeve 22 and the liquid level electrode 2, and prevent liquid in the container from entering between the insulating sleeve 22 and the electrode guide rod 21 and corroding the electrode guide rod 21.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrode-type liquid level measuring device, characterized in that, The device includes a blind flange and a liquid level electrode. The blind flange has a mounting hole, through which the liquid level electrode passes and is connected to the blind flange. The liquid level electrode includes an electrode rod, an insulating sleeve, and a wire. One end of the electrode rod is a measuring end, and the other end is a lead-out end. The insulating sleeve is fitted onto the electrode rod, and the wire is connected to the lead-out end of the electrode rod.

2. The electrode-type liquid level measuring device according to claim 1, characterized in that, The blind flange is provided with four liquid level electrodes, which are arranged sequentially from top to bottom, and are respectively a high liquid level measuring electrode, a medium liquid level measuring electrode, a low liquid level measuring electrode, and a common end electrode.

3. The electrode-type liquid level measuring device according to claim 1, characterized in that, A mounting base is provided on the side of the blind flange near the lead-out end of the electrode guide rod. The mounting base is matched with the liquid level electrode and is provided at the corresponding mounting hole. The inner wall of the mounting base is provided with a first conical surface and an internal thread. The diameter of the first conical surface gradually increases toward the lead-out end of the electrode guide rod, and the internal thread is provided on the side of the first conical surface near the lead-out end of the electrode guide rod. The electrode guide rod has a second conical surface, an external thread, and a gripping surface arranged sequentially towards the end. The diameter of the second conical surface gradually increases towards the end of the electrode guide rod, and the external thread and the internal thread are detachably engaged. The first conical surface and the second conical surface are matched, and the end of the insulating sleeve near the lead-out end of the electrode rod gradually expands towards the end and is pressed between the first conical surface and the second conical surface.

4. The electrode-type liquid level measuring device according to claim 3, characterized in that, The gripping surface is covered with an insulating material, which covers the connection between the wire and the electrode rod.

5. The electrode-type liquid level measuring device according to claim 1, characterized in that, The measuring end of the electrode rod is a third conical surface that gradually narrows towards the end. The insulating sleeve near the measuring end of the electrode rod gradually narrows towards the end and is pressed against the third conical surface.

6. The electrode-type liquid level measuring device according to claim 5, characterized in that, The measuring end of the electrode rod is connected to a platinum contact, which extends from the end of the insulating sleeve.

7. The electrode-type liquid level measuring device according to claim 1, characterized in that, A sealing ring is provided between the mounting hole and the liquid level electrode.

8. The electrode-type liquid level measuring device according to claim 1, characterized in that, The lead-out end of the electrode rod is provided with a welding blind hole, and the end of the wire is inserted into the welding blind hole and connected to the electrode rod by welding.

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