Anti-static capacitive level meter

Abstract

The utility model discloses an anti-static capacitance level meter, relates to the field of level meters, and aims to solve the problems that static electricity on the capacitance level meter is conducted back to the earth by installing a grounding wire and connecting the capacitance level meter with the ground through the grounding wire, the anti-static effect of the capacitance level meter is poor, and the capacitance level meter cannot be used for conducting static electricity on the capacitance level meter to the earth. According to the technical scheme, the capacitive level meter is characterized by comprising a fixing plate, a level meter main body is arranged above the fixing plate, a sensing element rod assembly is arranged at the lower end of the level meter main body, a connecting convex ring is arranged at the upper end of the fixing plate, and the connecting convex ring is arranged at the lower end of the level meter main body. The connecting convex ring is arranged outside the lower portion of the level meter body, a protective cover is arranged above the outer portion of the level meter body, a threaded groove is formed in the inner wall of the lower end of the protective cover, the protective cover is in threaded connection with the connecting convex ring, and a grounding wire is arranged on one side of the fixing plate.

Description

Technical Field

[0001] This utility model relates to the technical field of level gauges, specifically to an anti-static capacitive level gauge. Background Technology

[0002] A level gauge is an instrument used to measure the height of materials in closed or open containers during industrial production processes. It is capable of continuous or limit-based measurement of material height. Continuous measurement refers to the continuous, real-time monitoring of material height, while limit-based measurement refers to detecting whether the material height has reached a predetermined position. A capacitance level gauge is an instrument that measures the level of a medium within a container by utilizing changes in capacitance. Inside the container, electrodes and the container wall made of conductive material form a capacitor. For a given electrode, when the dielectric constant of the measured medium remains constant, applying a fixed-frequency measuring voltage to the electrode will result in a current flowing through the capacitor that depends on and is proportional to the height of the medium between the capacitor electrodes. Capacitive level gauges measure level based on changes in capacitance. A fundamental requirement for using a capacitance level gauge to measure level is that the relative dielectric constant of the measured medium should not change during the measurement process.

[0003] A search revealed that in the prior art, CN110440870A discloses a capacitive radio frequency admittance level gauge, including a fixed plate. A through hole is opened at the middle of the upper end of the fixed plate, and a housing is fixedly installed inside the through hole. The upper end of the housing is connected to the lower end of the radio frequency capacitive level gauge body, and the lower end of the housing is connected to the upper end of the sensing element. Connecting blocks are fixedly installed on both sides of the radio frequency capacitive level gauge body on the fixed plate. A fixing device is installed on one side of the two sets of connecting blocks on the fixed plate. The fixing device includes a movable rod one and a movable rod two. The upper ends of movable rod one and movable rod two are connected to the two sides of the movable plate. A rotating block is sleeved on the upper end of movable rod one on the movable plate. A handle is fixedly installed on one side of the upper end of the rotating block, and a stop is provided on one side of the lower end of the rotating block. A spring one is sleeved on movable rod one on the lower end of the movable plate. A fixing column is fixedly installed on one side of movable rod one on the fixed plate. The fixing column and movable rod two are connected by spring two.

[0004] However, the following drawbacks still exist in this device and existing technology:

[0005] Existing capacitive level gauges typically connect to the earth via a grounding wire, which conducts static electricity back to the ground. However, this method is not very effective at preventing static electricity buildup, which can negatively impact the gauge and reduce its performance. Utility Model Content

[0006] The purpose of this invention is to provide an anti-static capacitive level gauge.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An anti-static capacitive level gauge includes a fixed plate, a level gauge body is disposed on the upper part of the fixed plate and connected to the fixed plate by screws, a sensing element rod assembly is disposed at the lower end of the level gauge body and the upper end of the sensing element rod assembly is integrally connected to the lower end of the level gauge body, a lead wire terminal block is disposed on one side of the level gauge body and is integrally connected to the level gauge body, a connecting protrusion is disposed at the upper end of the fixed plate and is integrally formed with the fixed plate, the connecting protrusion is disposed on the lower exterior of the level gauge body, a protective cover is disposed above the exterior of the level gauge body, a threaded groove is disposed on the inner wall of the lower end of the protective cover and the threaded groove is correspondingly disposed with the connecting protrusion, the protective cover is threadedly connected to the connecting protrusion, and a grounding wire is disposed on one side of the fixed plate and is integrally connected with the fixed plate.

[0009] By adopting the above technical solution, the grounding wire connects the capacitive level gauge to the earth, and the static electricity generated on the capacitive level gauge is conducted back to the earth through the grounding wire to prevent static electricity accumulation. The protective cover is connected to the connecting protrusion ring to form a protective layer on the outside of the level gauge body. The protective cover is made of metal carbon fiber, and the surface of metal carbon fiber is conductive, which can conduct static electricity away, reduce electromagnetic interference, and further improve the anti-static effect of the capacitive level gauge.

[0010] Furthermore, a flip cover is provided on the top of the level gauge body, and a hinge is provided between the flip cover and the level gauge body. The flip cover and the level gauge body are rotatably connected by the hinge. A reserved hole is provided on the protective cover, and the reserved hole is correspondingly provided with the lead wire terminal block. A heat shrink ring is provided inside the reserved hole, and the heat shrink ring is connected to the protective cover as a whole.

[0011] By adopting the above technical solution, the reserved hole allows the data cable to be inserted from the outside of the protective cover and connected to the lead wire terminal block, realizing the data transmission of the capacitive level gauge. The heat shrink ring is in close contact with the surface of the data cable, completely filling the gap between the data cable and the reserved hole, ensuring the airtight connection between the data cable and the protective cover.

[0012] Furthermore, the protective cover is provided with an antistatic coating on its exterior, and the antistatic coating is integrally applied to the protective cover.

[0013] By adopting the above technical solution, the antistatic coating is made of sodium polyacrylate. Sodium polyacrylate has good corrosion resistance, conductivity and antistatic properties, which can effectively prevent static electricity accumulation and reduce static electricity release, thus better protecting the capacitive level gauge inside the protective cover.

[0014] Furthermore, a transparent plate is provided on the top of the protective cover, and the transparent plate is integrated with the protective cover.

[0015] By adopting the above technical solution, the operation of the internal capacitive level gauge can be observed from above the protective cover through a transparent plate, without having to remove the capacitive level gauge for observation, thus improving the practicality of the protective cover.

[0016] Furthermore, the fixing plate is provided with mounting holes, at least three of which are equidistant from each other on the fixing plate. The mounting holes are located inside the connecting protrusion ring. A rubber washer is provided at the lower end of the fixing plate, and the rubber washer is in close contact with the fixing plate.

[0017] By adopting the above technical solution, the mounting plate can be easily fixed to the container using mounting bolts through the mounting holes, thus realizing the installation of the capacitive level gauge. The rubber gasket separates the mounting plate from the container. The rubber gasket itself has insulating properties, which can prevent static electricity generated on the container from being conducted to the capacitive level gauge.

[0018] In summary, the beneficial technical effects of this utility model are as follows:

[0019] 1. The system incorporates a grounding wire, protective cover, connecting ring, and anti-static coating. The grounding wire connects the capacitive level gauge to the earth, guiding static electricity generated on the gauge back to the earth and preventing accumulation. The protective cover, connected to the connecting ring, forms a protective layer on the outside of the level gauge body. The protective cover is made of carbon fiber, which is conductive and can conduct static electricity away. Sodium polyacrylonitrile coating is evenly applied to the surface of the protective cover. Sodium polyacrylonitrile has good corrosion resistance, conductivity, and anti-static properties, effectively preventing static accumulation and reducing static discharge, further improving the anti-static effect of the capacitive level gauge.

[0020] 2. The design incorporates pre-drilled holes and heat shrink rings. The pre-drilled holes allow the data cable to be inserted from outside the protective cover and connected to the lead wire terminal block, enabling data transmission from the capacitive level gauge. The heat shrink rings make tight contact with the surface of the data cable, completely filling the gap between the data cable and the pre-drilled holes, ensuring a tight seal between the data cable and the protective cover. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of this practical application;

[0023] Figure 2 This is the front view of this practical capacitive level gauge;

[0024] Figure 3 This is a structural diagram of a practical protective cover;

[0025] Figure 4 This is a cross-sectional diagram of a practical protective cover.

[0026] In the diagram, 1. Fixing plate; 2. Protective cover; 3. Grounding wire; 4. Sensing element rod assembly; 5. Rubber gasket; 6. Level gauge body; 7. Mounting hole; 8. Connecting protrusion ring; 9. Lead wire terminal block; 10. Flip cover; 11. Hinge; 12. Reserved hole; 13. Heat shrink ring; 14. Threaded groove; 15. Transparent plate; 16. Antistatic coating. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-4 This utility model provides a technical solution: an anti-static capacitive level gauge, including a fixing plate 1, a level gauge body 6 disposed on the upper part of the fixing plate 1, and the level gauge body 6 and the fixing plate 1 are connected by screws. A sensing element rod assembly 4 is disposed at the lower end of the level gauge body 6, and the upper end of the sensing element rod assembly 4 is integrally connected to the lower end of the level gauge body 6. A lead wire terminal block 9 is disposed on one side of the level gauge body 6, and the lead wire terminal block 9 is integrally connected to the level gauge body 6. A connecting protrusion ring 8 is disposed at the upper end of the fixing plate 1, and the connecting protrusion ring 8 is integrally formed with the fixing plate 1. The connecting protrusion ring 8 is disposed on the outside of the lower part of the level gauge body 6, and a connection ring 8 is disposed on the upper part of the outside of the level gauge body 6. The device includes a protective cover 2 with a threaded groove 14 on the inner wall at the lower end, which corresponds to the connecting protrusion 8. The protective cover 2 is threadedly connected to the connecting protrusion 8. A grounding wire 3 is provided on one side of the fixing plate 1 and is integrated with the fixing plate 1. The grounding wire 3 connects the capacitive level gauge to the earth, and conducts the static electricity generated on the capacitive level gauge back to the earth through the grounding wire 3 to prevent static electricity accumulation. The protective cover 2 is connected to the connecting protrusion 8, forming a protective layer on the outside of the level gauge body 6. The protective cover 2 is made of metal carbon fiber, and the surface of the metal carbon fiber is conductive, which can conduct away static electricity, reduce electromagnetic interference, and further improve the anti-static effect of the capacitive level gauge.

[0030] Please see Figure 2A flip cover 10 is provided on the top of the level gauge body 6. A hinge 11 is provided between the flip cover 10 and the level gauge body 6, and the flip cover 10 and the level gauge body 6 are rotatably connected by the hinge 11.

[0031] Please see Figure 1 The protective cover 2 is provided with a reserved hole 12, and the reserved hole 12 is correspondingly provided with the lead wire terminal 9. A heat shrink ring 13 is provided inside the reserved hole 12, and the heat shrink ring 13 is connected to the protective cover 2 as a whole. The reserved hole 12 allows the data cable to be inserted from the outside of the protective cover 2 and connected to the lead wire terminal 9 to realize the data transmission of the capacitive level gauge. The heat shrink ring 13 is in close contact with the surface of the data cable, completely filling the gap between the data cable and the reserved hole 12, ensuring the airtight connection between the data cable and the protective cover 2.

[0032] Please see Figure 4 The protective cover 2 is provided with an antistatic coating 16 on its exterior, and the antistatic coating 16 is integrally coated with the protective cover 2. The antistatic coating 16 is made of sodium polyacrylonitrile coating. Sodium polyacrylonitrile has good corrosion resistance, conductivity and antistatic properties, which can effectively prevent static electricity accumulation and reduce static electricity release, and better protect the capacitive level gauge inside the protective cover 2.

[0033] Please see Figure 1 and Figure 3 The top of the protective cover 2 is provided with a transparent plate 15, and the transparent plate 15 is integrated with the protective cover 2. The operation status of the internal capacitive level gauge can be observed from above the protective cover 2 through the transparent plate 15 without removing the capacitive level gauge for observation, thus improving the practicality of the protective cover 2.

[0034] Please see Figure 2 The fixing plate 1 is provided with mounting holes 7, at least three of which are equidistant from each other. The mounting holes 7 are located inside the connecting protruding ring 8. A rubber washer 5 is provided at the lower end of the fixing plate 1 and is in close contact with the fixing plate 1. The mounting holes 7 facilitate the use of mounting bolts to fix the fixing plate 1 to the container, thereby realizing the installation of the capacitive level gauge. The rubber washer 5 separates the fixing plate 1 from the container. The rubber washer 5 itself has insulating properties, which can prevent the static electricity generated on the container from being conducted to the capacitive level gauge.

[0035] Working principle: Grounding wire 3 connects the capacitive level gauge to the earth, conducting static electricity generated on the capacitive level gauge back to the earth to prevent static buildup. The protective cover 2 is connected to the connecting protrusion ring 8, forming a protective layer on the outside of the level gauge body 6. The protective cover 2 is made of metal carbon fiber, which has conductivity and can conduct static electricity away, reducing electromagnetic interference. Sodium polyacrylonitrile coating is evenly applied to the surface of the protective cover 2. Sodium polyacrylonitrile has good corrosion resistance, conductivity, and antistatic properties, which can effectively prevent static accumulation and reduce static discharge, further improving the antistatic effect of the capacitive level gauge. The data cable is passed through the reserved hole 12 and connected to the lead wire terminal 9 to realize the data transmission of the capacitive level gauge. The heat shrink ring 13 is in close contact with the surface of the data cable, completely filling the gap between the data cable and the reserved hole 12, ensuring the airtight connection between the data cable and the protective cover 2.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electrostatically shielded capacitance level gauge comprising a fixed plate (1), characterized in that: The upper side of the fixed plate (1) is provided with a level gauge body (6), and the level gauge body (6) is connected with the fixed plate (1) through screws, the lower end of the level gauge body (6) is provided with a sensing element rod assembly (4), and the upper end of the sensing element rod assembly (4) is connected with the lower end of the level gauge body (6) as a whole, one side of the level gauge body (6) is provided with a lead wire terminal block (9), and the lead wire terminal block (9) is connected with the level gauge body (6) as a whole, the upper end of the fixed plate (1) is provided with a connecting convex ring (8), and the connecting convex ring (8) is provided with the fixed plate (1) as a whole, the connecting convex ring (8) is arranged outside the lower side of the level gauge body (6), the upper side of the outside of the level gauge body (6) is provided with a protective cover (2), the inner wall of the lower end of the protective cover (2) is provided with a threaded groove (14), and the threaded groove (14) is correspondingly arranged with the connecting convex ring (8), the protective cover (2) is threadedly connected with the connecting convex ring (8), one side of the fixed plate (1) is provided with a grounding wire (3), and the grounding wire (3) is connected with the fixed plate (1) as a whole.

2. A capacitance-based level meter that prevents static electricity according to claim 1, characterized by: The upper side of the level gauge body (6) is provided with a flip cover (10), a hinge (11) is arranged between the flip cover (10) and the level gauge body (6), and the flip cover (10) and the level gauge body (6) are rotatably connected through the hinge (11).

3. The anti-static capacitance level gauge according to claim 1, characterized in that: The protective cover (2) is provided with a reserved hole (12), and the reserved hole (12) is correspondingly arranged with the lead wire terminal block (9), the inside of the reserved hole (12) is provided with a heat shrink ring (13), and the heat shrink ring (13) is connected with the protective cover (2) as a whole.

4. The anti-static capacitance level gauge according to claim 1, characterized in that: The outside of the protective cover (2) is provided with an anti-static coating (16), and the anti-static coating (16) is integrally coated with the protective cover (2).

5. The anti-static capacitive level gauge according to claim 1, characterized in that: The top of the protective cover (2) is provided with a transparent plate (15), and the transparent plate (15) is provided with the protective cover (2) as a whole.

6. The anti-static capacitive level gauge according to claim 1, characterized in that: The fixed plate (1) is provided with mounting holes (7), the mounting holes (7) are provided with at least three, and the mounting holes (7) are equidistantly arranged on the fixed plate (1), and the mounting holes (7) are arranged on the inner side of the connecting convex ring (8).

7. The anti-static capacitive level gauge according to claim 1, characterized in that: The lower end of the fixed plate (1) is provided with a rubber gasket (5), and the rubber gasket (5) is connected with the fixed plate (1) in close contact.

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