High-insulating-performance pipeline type powder electrostatic charge test sensor

Abstract

The utility model discloses a pipeline type powder electrostatic charge test sensor with high insulation performance, and relates to the technical field of electrostatic charge measurement. Comprising a metal pipeline, a mounting base and a BNC adapter. The metal pipeline comprises a metal inner pipe and a metal outer pipe, and a polytetrafluoroethylene high-voltage insulating material is arranged between the metal inner pipe and the metal outer pipe to ensure insulation. And the metal outer tube is grounded and is provided with a mounting hole for mounting the BNC adapter. And the mounting base is welded on the outer pipe and is provided with a glue injection hole and a through hole. And a high-voltage-resistant core wire of the BNC adapter is connected with the metal inner tube through threads and is isolated from the mounting base, the metal outer tube and the shell through insulating glue and a protective shell. The sensor calculates the electrostatic charge quantity by measuring the potential difference of the metal inner pipe and the metal outer pipe and combining the capacitance value, has the advantages of good insulativity, accurate measurement and convenient installation and maintenance, is suitable for various powder transmission pipelines, and can effectively meet the measurement requirements on the powder electrostatic charge in industrial production.

Description

Technical Field

[0001] This utility model relates to the field of electrostatic charge measurement technology, and in particular to a high-insulation-performance pipeline-type powder electrostatic charge test sensor. Background Technology

[0002] In industrial production, the transport of powder materials is a common and crucial step. During transport within pipelines, powder is prone to generating static electricity due to friction, collisions, and other physical interactions. This static charge can not only interfere with the production process but also potentially cause fires, explosions, and other safety accidents, posing a serious threat to personnel and equipment safety. Therefore, real-time monitoring and control of static charges generated during powder transport is of paramount importance.

[0003] Currently, various electrostatic charge measuring devices exist on the market, but these devices still have some shortcomings in practical applications. Many electrostatic charge measuring devices have insufficient insulation performance, leading to inaccurate measurement results. During powder transport, the generation and accumulation of electrostatic charge is a dynamic process; if the insulation performance of the measuring device is poor, charge leakage is likely, resulting in distorted measurement results. Existing electrostatic charge measuring devices have complex structures, making installation and maintenance inconvenient and increasing operating costs. Furthermore, some measuring devices have low measurement accuracy, failing to meet the requirements of high-precision measurement and limiting their application range in industrial production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pipeline-type powder electrostatic charge test sensor with better insulation, more accurate measurement, and more convenient use.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A high-insulation-performance pipeline-type powder electrostatic charge test sensor, the key technology of which includes a metal pipeline, a mounting base, and a BNC adapter; the mounting base is connected to the outside of the metal pipeline, the outer shell of the BNC adapter is connected to the mounting base, and the high-voltage resistant core wire of the BNC adapter is connected to the metal pipeline.

[0007] Preferably, the metal pipe includes an outer metal pipe, an inner metal pipe, and upper and lower flanges, and a PTFE high-pressure insulating liner is installed between the inner metal pipe and the outer metal pipe.

[0008] The inner metal tube is provided with connecting screw holes; both ends of the inner tube are provided with PTFE high-voltage insulating end tubes; one side of the outer tube is provided with mounting holes; the mounting holes penetrate the outer metal tube and the PTFE high-voltage insulating liner; the axis of the mounting holes coincides with the axis of the connecting screw holes; the outer metal tube is connected to a grounding wire and is securely grounded.

[0009] Preferably, the mounting base is installed on the outside of the metal outer tube by welding; the mounting base has an injection hole on its side; the mounting base has a through hole with the same diameter as the mounting hole and the axis of the through hole coincides with the axis of the mounting hole; the injection hole passes through one side of the mounting base and connects to the through hole.

[0010] Preferably, the BNC adapter includes a housing, a protective shell, and a high-voltage resistant core wire;

[0011] The housing includes a fixed flange and a metal cylinder; the metal cylinder is connected to one side of the flange; the other side of the flange is connected to a mounting base; the inner diameter of the fixed flange is the same as the outer diameter of the protective housing, and the inner diameter of the metal cylinder is slightly larger than the outer diameter of the protective housing.

[0012] One end of the high-voltage resistant core wire is threaded; the outer side of the part of the core wire not covered by the protective shell is set as an insulating glue compartment; the glue injection hole is connected to the insulating glue compartment; the threaded end of the high-voltage resistant core wire passes through the mounting hole, through hole and fixing flange, and is connected to the connecting screw hole of the metal inner tube by thread engagement; one end of the high-voltage resistant core wire is flush with the inner wall of the metal inner tube.

[0013] The insulating compartment includes a mounting hole and a cylindrical space inside the through hole;

[0014] The protective shell covers the unthreaded end of the high-voltage resistant core wire and passes through the limiting flange and the through hole; the outer diameter of the protective shell is slightly smaller than the diameter of the through hole of the mounting base, and the top of the protective shell is provided with a measuring hole for connecting the test circuit.

[0015] The beneficial effects of adopting the above technical solution are as follows:

[0016] This invention forms an insulation barrier between the inner and outer metal tubes by using a PTFE high-voltage insulating liner and a PTFE high-voltage insulating end tube, ensuring the insulation state between the inner and outer metal tubes. At the same time, a grounding wire is added to the outer metal tube to further reduce the influence of the outer metal tube on the inner metal tube. In addition, the high-voltage core wire of the measurement core is isolated by insulating glue and a protective shell to prevent charge from leaking to the outer metal tube through the core wire.

[0017] This invention measures the amount of electrostatic charge by measuring the potential difference between the inner and outer metal tubes. This measurement method, based on the principle of electrostatic induction, combined with the high-insulation environment created in this invention and the stable electrical connection structure between the high-voltage core wire and the inner metal tube, improves the accuracy of the measurement.

[0018] This utility model connects the powder transport pipeline via a flange, and the high-pressure resistant core wire is connected through a threaded bolt hole. The installation process and subsequent maintenance are simple and easy, thus improving work efficiency. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of a high-insulation-performance pipeline-type powder electrostatic charge testing device proposed in this utility model.

[0021] Explanation of reference numerals in the attached figures

[0022] 1. Metal pipe; 11. Metal outer tube; 111. Mounting hole; 12. Metal inner tube; 121. Connecting screw hole; 13. PTFE high-voltage insulating liner; 14. PTFE high-voltage insulating end tube; 2. Mounting base; 21. Glue injection hole; 3. BNC adapter; 31. Outer shell; 311. Fixing flange; 312. Metal cylinder; 32. High-voltage resistant core wire; 33. Protective shell; 331: Measuring hole; 4. Insulating glue compartment. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] See appendix Figure 1 A high-insulation-performance pipeline-type powder electrostatic charge test sensor includes a metal pipeline 1, a mounting base 2, and a BNC adapter 3.

[0025] The metal pipe 1 consists of an inner metal pipe 12 and an outer metal pipe 11. A high-voltage resistant polytetrafluoroethylene (PTFE) insulating material is installed between the inner and outer metal pipes 12 and 11. Specifically, this includes PTFE high-voltage insulating end tubes 14 at both ends of the inner metal pipe 12 and a PTFE high-voltage insulating liner 13 positioned between the inner and outer metal pipes 12 and 11. PTFE possesses excellent insulation properties and high-voltage resistance. The use of the PTFE high-voltage insulating liner 13 and the PTFE high-voltage insulating end tubes 14 forms a reliable insulating barrier between the inner and outer metal pipes 12 and 11. This structural design effectively prevents charge leakage between the inner and outer metal pipes, ensuring that the sensor can accurately capture the electrostatic charge generated by the powder inside the pipe during measurement, greatly improving measurement accuracy and providing strong support for electrostatic monitoring and control in industrial production. Flanges are installed at both the upper and lower ends of the pipe. These flanges connect the sensor to the overall transport pipeline, achieving seamless integration of the powder transport channel. The flange connection method is simple and reliable, requiring no complex installation tools or techniques, allowing operators to quickly install and remove the sensor. This not only improves installation efficiency and reduces installation costs, but also facilitates sensor replacement and maintenance when needed, enhancing the flexibility and reliability of the production process. Furthermore, the standard flange interface design allows the sensor to be compatible with various specifications and types of transport pipelines, whether vertical or horizontal, enabling convenient installation and use. This significantly expands the sensor's application range and meets the needs of different industrial production scenarios.

[0026] A mounting hole 111 is provided on one side of the outer metal tube 11. The mounting hole 111 passes through the outer metal tube 11 and the PTFE high-voltage insulating liner 13, providing an installation environment for the BNC adapter 3. At the same time, the empty part forms part of the insulating rubber compartment 4. Meanwhile, the outer metal tube 11 is connected to an external grounding wire. The stable grounding of the outer metal tube 11 ensures that the outer metal tube 11 is always at zero potential, reducing the interference of the charge on the outer metal tube 11 on the inner metal tube 12. This facilitates the subsequent measurement of the potential difference between the inner metal tube 12 and the outer metal tube 11 and also improves the accuracy of charge measurement.

[0027] A connecting screw hole 121 is provided on the metal inner tube 12, and the axis of the mounting hole 111 coincides with the axis of the connecting screw hole 121, which is used to connect the high voltage resistant core wire 32 of the BNC adapter 3.

[0028] The mounting base 2 is fixed to the outside of the metal outer tube 11 by welding. The stable mounting base 2 can better protect the internal high-voltage core wire 32 and other components, preventing them from being interfered with and damaged by external factors, and providing stable structural support for the entire BNC adapter. During the use of the sensor, even if it is affected by the vibration and temperature changes of the external environment, the BNC adapter will not loosen or shift, ensuring the stability and reliability of the electrostatic detection structure. A through hole is provided in the mounting base 2, the diameter of which is the same as that of the mounting hole 111, providing a testing environment for the BNC adapter 3, and the internal space also forms part of the insulating glue chamber 4. A glue injection hole 21 is provided on one side of the mounting base 2, which passes through one side of the mounting base 2 and connects to the through hole. The glue injection hole 21 communicates with the insulating glue chamber 4 and is used to fill the insulating glue chamber 4 with insulating glue after the sensor is installed.

[0029] The BNC adapter 3 is the core of this sensor's measurement mechanism, comprising a housing 31, a protective shell 33, and a high-voltage resistant core wire 32. The housing 31 further includes a fixed flange 311 and a metal cylinder 312. The metal cylinder 312 is connected to one side of the fixed flange 311, while the other side of the fixed flange 311 is mounted on a metal base, forming a protective and securing structure for the interior of the BNC adapter 3. The fixed flange 311 and the metal base are connected by bolts or clips, making operation simple and convenient. The metal cylinder 312 protects the internal measuring device and provides some shielding against interference. Because the inner diameter of the metal cylinder 312 is larger than the outer diameter of the protective shell 33, when the metal cylinder 312 is subjected to external force, it will not be directly transmitted to the internal measuring device, effectively buffering the force and protecting the integrity of the internal components. Simultaneously, the metal material has a certain shielding effect, reducing the influence of external electromagnetic interference on the electrostatic detection signal and improving the accuracy and stability of the measurement.

[0030] The protective shell 33 covers the unthreaded end of the high-voltage resistant core wire 32, preventing direct contact between the high-voltage resistant core wire 32 and the mounting base 2 and the outer shell 31, which could lead to grounding. It also stabilizes the high-voltage resistant core wire 32. Firstly, since the outer shell 31, mounting base 2, and outer metal tube 11 are all conductors and interconnected, and the outer metal tube 11 is grounded, it is essential to ensure that the inner metal tube 12 does not contact the outer shell 31 and mounting base 2 in order to measure the potential of the inner metal tube 12. Secondly, during the installation and use of the sensor, collisions and friction may occur. The protective shell 33 acts as a buffer layer to prevent sharp objects from scratching the core wire, avoiding damage to the insulation layer of the core wire, thus ensuring the electrical performance of the core wire is stable and maintaining the normal operation of the sensor. Furthermore, the outer diameter of the protective shell 33 is the same as the inner diameter of the fixed flange 311, ensuring the relative position stability of the internal high-voltage resistant core wire 32.

[0031] The top of the protective shell 33 is provided with a measuring hole 331 for connecting the test circuit. The potential difference between the inner metal tube 12 and the outer metal tube 11 is obtained by connecting the external circuit through the measuring hole 331.

[0032] One end of the high-voltage resistant core wire 32 is threaded, and the high-voltage resistant core wire 32 passes through the outer metal tube 11 and the PTFE high-voltage insulating liner 13. It is connected via the thread and the connecting screw hole 121 on the inner metal tube 12. This threaded and screw-hole connection method ensures the stability of the connection, the reliability of the point connection, and the accuracy of measurements during the measurement process. It also simplifies installation and facilitates future updates and maintenance. One end of the high-voltage resistant core wire 32 is flush with the inner wall of the inner metal tube 12.

[0033] The insulating adhesive compartment 4 is a space formed by the mounting holes 111 and through holes. After the protective shell 33 and the high-voltage resistant core wire 32 are installed, the remaining space is used to hold the insulating adhesive. This part uses insulating adhesive to fill the space instead of rigid insulating materials, ensuring the insulation performance of the high-voltage resistant core wire 32, preventing charge leakage through the gap between the core wire and the metal outer tube 11, and ensuring the accuracy of the measurement results. It also has good sealing performance, preventing external dust and moisture from entering the insulating adhesive compartment 4, protecting the high-voltage resistant core wire 32 and other components. Furthermore, the filling with insulating adhesive also enhances the mechanical strength of the entire electrostatic detection structure, improving the stability and reliability of the sensor.

[0034] Since the outer metal tube 11 is grounded, when the powder passes through the sensor and generates static electricity, the amount of static charge generated in the pipe can be accurately calculated by combining the pre-measured capacitance value of the sensor and using relevant electrical formulas.

[0035] Installation Process: First, connect the upper and lower flanges of the pipeline sensor body to the corresponding interfaces of the overall transport pipeline, and tighten them with bolts or other connectors to ensure a tight connection and prevent powder leakage. Then, at the pre-set mounting holes 111 on the metal outer tube 11, fix the mounting base 2 to the metal outer tube 11 by welding. Ensure welding quality during the welding process to guarantee a secure connection between the mounting base 2 and the metal outer tube 11. Next, install the BNC adapter 3 housing 31 onto the mounting base 2, fixing it in the correct direction and position. Then, pass the high-voltage resistant core wire 32 through the metal outer tube 11, the PTFE high-voltage insulating liner 13, and the PTFE high-voltage insulating end tube 14, ensuring the threaded end of the core wire engages with the connecting screw hole 121 of the metal inner tube 12. Rotate the core wire until tightened, ensuring a reliable connection between the core wire and the metal inner tube 12. Finally, cover the high-voltage resistant core wire 32 with a protective shell 33. Finally, insulating adhesive is injected into the insulating adhesive chamber 4 through the injection hole 21 on the side of the mounting base 2. After the insulating adhesive completely fills the insulating adhesive chamber 4, it is left to stand for a period of time to allow the insulating adhesive to fully cure, thereby achieving insulation between the high-voltage core wire 32 and the metal outer tube 11.

[0036] Measurement Process: After the powder begins to flow through the pipe, it moves from top to bottom. Due to friction and collisions between the powder and the pipe wall, as well as between the powder particles, electrostatic charges are generated. According to the principle of electrostatic induction, a potential difference is created between the inner and outer metal tubes. A potential difference measuring instrument is connected to the measuring port 331 of the BNC adapter 3 to measure the potential difference between the inner and outer metal tubes. Simultaneously, the pre-determined capacitance value of the sensor is read. The amount of electrostatic charge generated in the pipe is calculated by combining the measured potential difference and capacitance value. During the measurement process, measurement data can be recorded periodically or in real-time as needed to monitor and analyze changes in electrostatic charge during powder transport.

[0037] The electrostatic charge test sensor proposed in this invention can measure the potential difference between the inner and outer metal tubes in real time, thereby realizing the acquisition of electrostatic charge in real time and dynamically.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high insulating property tubular powder electrostatic charge test sensor, characterized by, It includes a metal pipe (1), a mounting base (2) and a BNC adapter (3); the mounting base (2) is connected to the outside of the metal pipe (1), the outer shell (31) of the BNC adapter (3) is connected to the mounting base (2), and the high-voltage core wire (32) of the BNC adapter (3) is connected to the metal pipe (1).

2. The high insulating property tubular powder electrostatic charge test sensor according to claim 1, wherein The metal pipe (1) includes an outer metal pipe (11), an inner metal pipe (12), and two flanges. A PTFE high-pressure insulating liner (13) is installed between the inner metal pipe (12) and the outer metal pipe (11). The inner metal tube (12) is provided with a connecting screw hole (121); both ends of the inner tube are provided with PTFE high-voltage insulating end tubes (14); one side of the outer tube is provided with a mounting hole (111); the mounting hole (111) passes through the outer metal tube (11) and the PTFE high-voltage insulating liner (13); the axis of the mounting hole (111) coincides with the axis of the connecting screw hole (121); the outer metal tube (11) is connected to an external grounding wire and is firmly grounded.

3. The high insulating property tubular powder electrostatic charge test sensor according to claim 1, wherein The mounting base (2) is installed on the outside of the metal outer tube (11) by welding; the mounting base (2) has an injection hole (21) on its side; the mounting base (2) has a through hole with the same diameter as the mounting hole (111) and the axis of the through hole coincides with the axis of the mounting hole (111); the injection hole (21) passes through one side of the mounting base (2) and is connected to the through hole.

4. The high insulating property tubular powder electrostatic charge test sensor according to claim 3, wherein The BNC adapter (3) includes a housing (31), a protective shell (33), and a high-voltage resistant core wire (32). The outer casing (31) includes a fixed flange (311) and a metal cylinder (312); the metal cylinder (312) is connected to one side of the flange; the other side of the flange is connected to the mounting base (2); the inner diameter of the fixed flange (311) is the same as the outer diameter of the protective shell (33), and the inner diameter of the metal cylinder (312) is slightly larger than the outer diameter of the protective shell (33); One end of the high-voltage resistant core wire (32) is threaded; the outer side of the part of the core wire not covered by the protective shell (33) is provided as an insulating glue compartment (4); the glue injection hole (21) is connected to the insulating glue compartment (4); the threaded end of the high-voltage resistant core wire (32) passes through the mounting hole (111), the through hole and the fixing flange (311), and is connected to the connecting screw hole (121) of the metal inner tube (12) by thread engagement; one end of the high-voltage resistant core wire (32) is flush with the inner wall of the metal inner tube (12); The insulating compartment (4) includes a mounting hole (111) and a cylindrical space inside the through hole; The protective shell (33) covers the unthreaded end of the high-voltage core wire (32) and passes through the limiting flange and the through hole; the outer diameter of the protective shell (33) is slightly smaller than the diameter of the through hole of the mounting base (2), and the top of the protective shell (33) is provided with a measuring hole (331) for connecting the test line.

Images