Portable electrolytic bath area insulation resistance detection device

Abstract

The utility model discloses a portable electrolytic bath area insulation resistance detection device, which relates to the technical field of resistance detection, aims to solve the problem of a detection mode of groove-by-groove wiring and repeated disassembly and assembly in the prior art, and comprises two sets of test connection terminal assemblies which are respectively arranged at two ends of an electrolytic bath area to be detected. The voltage sensor is in electric signal connection with the terminal; electric signals are sampled through the voltage sensor and transmitted to the terminal, so that the terminal can complete electrolytic bath resistance calibration and insulation resistance calculation according to the electric signals. According to the utility model, rapid, lossless and low-cost detection of the insulation state of the electrolytic cell section can be realized, timely discovery of the insulation degradation section is facilitated, and reliable technical support is provided for safe operation and fine operation and maintenance of an electrolytic cell system.

Description

Technical Field

[0001] This utility model relates to a portable device for detecting the insulation resistance of an electrolytic cell area, belonging to the field of resistance detection technology. Background Technology

[0002] The aluminum electrolysis industry commonly employs a floating grounded DC power supply system, where current flows through a series of electrolytic cells via a DC bus, forming a stable circuit. In this system, the bus and electrolytic cells are not connected to ground, requiring a high insulation resistance to prevent current leakage. However, the electrolysis production environment is harsh, involving prolonged exposure to high temperatures, strong currents, and complex electromagnetic fields. Deterioration of the insulation to ground inevitably occurs within the electrolytic cell series, leading to current leakage into the ground. This causes abnormal cell voltage and current levels, decreased electrolysis efficiency, and can trigger localized abnormal heating, sparking, and even endanger personal safety.

[0003] To effectively detect the insulation resistance of electrolytic cells to ground and improve the safety and stability of the electrolysis system, convenient and accurate measurement of the insulation resistance of electrolytic cells to ground is crucial. However, current methods for measuring the insulation resistance of electrolytic cells to ground are relatively limited. Traditional methods are complex to operate, inefficient, require wiring cell by cell, cannot measure the insulation resistance of specific areas, and the complex connection methods of the test leads may damage the electrolytic cell structure. To address these issues, there is an urgent need for a portable electrolytic cell section insulation resistance testing device that is structurally stable, reliably connected, and capable of rapid deployment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a portable electrolytic cell area insulation resistance detection device, which can realize rapid, non-destructive and low-cost detection of the insulation status of electrolytic cell sections, which is conducive to timely detection of insulation deterioration sections and provides reliable technical support for the safe operation and refined maintenance of electrolytic cell systems.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] This utility model provides a portable device for detecting the insulation resistance of an electrolytic cell area, including two sets of test connection terminal assemblies. The test connection terminal assemblies are respectively located at both ends of the electrolytic cell area to be tested, and are both connected to a voltage sensor through wires. The voltage sensor is connected to a terminal electrical signal.

[0007] The voltage sensor samples electrical signals and transmits them to the terminal, enabling the terminal to perform electrolytic cell resistance calibration and insulation resistance calculation based on the electrical signals.

[0008] Furthermore, the test connection terminal assembly includes at least three test connection terminals, each test connection terminal including a clamping clamp body connected to a lead screw body, the lead screw body having a wire connection hole for connecting to a wire.

[0009] Furthermore, the clamping clamp is U-shaped and is held at the bottom of the electrolytic cell metal structure at the end of the electrolytic cell area to be tested.

[0010] Furthermore, the side of the clamping body is also provided with a tightening component for adjusting the tightness between the clamping body and the metal structure of the electrolytic cell. The tightening component includes a screw, which passes through the side of the clamping body and is threadedly connected to the clamping body.

[0011] Furthermore, insulating pressure blocks are provided at the end of the screw near the metal structure of the electrolytic cell and on the contact surface of the fastening clamp body with the metal structure of the electrolytic cell.

[0012] Furthermore, the lead screw body is inserted through the lower middle part of the fastening clamp body and is threadedly connected to the fastening clamp body. A rust removal head is provided at the end of the lead screw body near the metal structure of the electrolytic cell.

[0013] Furthermore, a universal joint is connected to one side of the lower part of the clamping body, and a scale telescopic rod is connected between the universal joints of adjacent test connection terminals. A cable management device is provided on the scale telescopic rod.

[0014] Furthermore, the end of the screw and lead screw that is away from the metal structure of the electrolytic cell is provided with a rotating handle.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0016] This invention combines a quick-installable test connection terminal with a retractable connecting rod and a voltage sampling device. Without damaging the metal structure of the electrolytic cell or performing welding or drilling, a stable and reliable electrical connection can be quickly established at both ends of the section to be tested, and the key potential of the section can be synchronously acquired.

[0017] This utility model device acquires cell voltage and ground voltage signals at a small number of representative locations within a section by arranging a set of measuring units at both ends of the section. It then combines the voltage difference relationship of the section to realize the equivalent calculation of the ground leakage current, thereby obtaining the section's ground insulation resistance. This realizes the transformation of electrolytic cell insulation detection from traditional cell-by-cell measurement to overall section evaluation.

[0018] Compared to existing testing methods that require wiring through each cell and repeated disassembly and reassembly, this invention significantly improves on-site deployment efficiency, reduces interference with the production environment and metal structures during testing, and minimizes the intensity of measurement wiring and manual operation. It also boasts excellent portability and reusability. This device enables rapid, non-destructive, and low-cost testing of the insulation condition of electrolytic cell sections, facilitating the timely detection of insulation degradation areas and providing reliable technical support for the safe operation and refined maintenance of electrolytic cell systems. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a portable electrolytic cell area insulation resistance detection device in one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the test connection terminals of the portable electrolytic cell area insulation resistance detection device in one embodiment of the present invention;

[0021] Figure 3 This is a sampling diagram illustrating the use of a portable electrolytic cell area insulation resistance detection device in one embodiment of the present invention.

[0022] In the diagram: 1-Clamping clamp body, 2-Screw body, 3-Wire connection hole, 4-Rust removal head, 5-Universal joint, 6-Insulating pressure block, 7-Rotating handle, 8-Screw, 9-Scale telescopic rod, 10-Wire, 11-Wire organizer, 12-Voltage sensor, 13-Metal structure of electrolytic cell. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0024] Example 1

[0025] like Figure 1 As shown, this embodiment of the invention provides a portable electrolytic cell area insulation resistance detection device, including two sets of test connection terminal assemblies, which are respectively arranged at both ends of the electrolytic cell area to be tested. Both test connection terminal assemblies are connected to an electrical signal sampling and transmission module via wires 10. In this embodiment, the electrical signal sampling and transmission module uses a voltage sensor. The voltage sensor is connected to a terminal via GSM communication and is connected to a ground wire via a wire.

[0026] The voltage sensor is used to sample electrical signals and transmit them to the terminal. Finally, the terminal uses the electrical signals to perform electrolytic cell resistance calibration and insulation resistance calculation.

[0027] like Figure 2As shown, each test connection terminal assembly includes at least three test connection terminals. In this embodiment, the number of test connection terminals is three. The test connection terminals include a clamping body 1, which is U-shaped and clamps the bottom of the electrolytic cell metal structure 13 at the end of the electrolytic cell area to be tested.

[0028] To facilitate adjustment of the tightness between the clamping clamp 1 and the electrolytic cell metal structure 13, this embodiment also includes a tightening / loosening assembly on the side of the clamping clamp 1. The assembly includes a screw 8 and a screw hole on the side of the clamping clamp 1, with the internal thread of the screw hole threadedly connected to the surface thread of the screw 8. By adjusting the screw 8, the clamping clamp 1 can be properly clamped at the bottom of the electrolytic cell metal structure 13 at the end of the electrolytic cell area to be tested.

[0029] In some embodiments, insulating blocks 6 are provided at one end of the screw 8 near the metal structure of the electrolytic cell and on the contact surface between the fastening clamp 1 and the metal structure 13 of the electrolytic cell to achieve contact insulation.

[0030] A lead screw body 2 is threadedly connected to the lower center of the fastening clamp body 1. The lead screw body 2 has a wire connection hole 3 for connecting a wire. Both the fastening clamp body 1 and the lead screw body 2 have a rotating handle 7 at the end furthest from the electrolytic cell metal structure 13, allowing the operator to rotate them. A rust-removing head 4 is also provided at the end of the lead screw body 2 closest to the electrolytic cell metal structure 13. Rotating the rust-removing head 4 via the lead screw body 2 scrapes away rust from the surface of the electrolytic cell metal structure 13.

[0031] A universal joint 5 is connected to one side below the clamping body 1. A scale telescopic rod 9 is connected between the universal joints 5 of adjacent test connection terminals. The scale on the scale telescopic rod 9 can keep the distance between connected test connection terminals consistent, thereby controlling the measurement conditions of different measurement points and improving the accuracy and correlation of signal sampling and calculation. A cable organizer 11 is also provided on the scale telescopic rod 9. The cable organizer 11 can organize the wires 10 so that they are arranged along the scale telescopic rod 9.

[0032] Example 2

[0033] like Figure 3 As shown, based on Example 1, this example also provides a testing method using a portable electrolytic cell area insulation resistance testing device, including the following steps:

[0034] Step 1: Device Installation

[0035] Confirm the location of the section to be tested, and define the two ends of the electrolytic cell area to be tested as end A and end B, respectively. Set up the following at end A: Figure 1The test connection terminal assembly shown is prepared by unfolding the two scale telescopic rods 9 to a suitable and equal length, then unscrewing the screws 8 and lead screws 2 of the three test connection terminals, clamping the clamping clamps at the bottom of the electrolytic cell metal structure 13, and then tightening the screws to fix the test connection terminals.

[0036] Rotate the lead screw 2 to make the rust removal head 4 contact the surface of the electrolytic cell metal structure 13 and continue to rotate to scrape off the surface rust. After the rust removal head 4 is in complete contact with the electrolytic cell metal structure 13, connect the wire connection hole 3 to the wire 10, and connect the wires 10 corresponding to the three test connection terminals to the voltage sensor 12 along the wire organizer 11. Then, ground the other wire connected to the voltage sensor 12.

[0037] The above operations are repeated on the B side.

[0038] Step 2: Electrical signal sampling and transmission

[0039] Let the three test connection terminals at end A be A1, A2, and A3, and the three test connection terminals at end B be B1, B2, and B3. The voltage sensor acquires voltage signals from the test connection terminals: slot voltage difference Ua12 between A1 and A2, slot voltage difference Ua23 between A2 and A3, slot voltage difference Ua13 between A1 and A3, voltage difference UaG between A2 and ground, slot voltage difference Ub12 between B1 and B2, slot voltage difference Ub23 between B2 and B3, slot voltage difference Ub13 between B1 and B3, and voltage difference UbG between B2 and ground. The electrical signals acquired by the voltage sensor are transmitted to the terminal for calibration and calculation via a GSM module.

[0040] Step 3: Electrolytic cell resistance calibration and section insulation resistance value calculation

[0041] The terminal obtains the above sampling data via GSM communication, calibrates whether the resistance values ​​of the electrolytic cells at both ends of the calibration section are uniformly distributed, compares Ua12 with Ua23, Ub12 with Ub23, and Ua13 with Ub13 to determine the uniformity of the electrolytic cell resistance distribution; based on the DC power supply series structure of the electrolytic cells, the DC current value Ia of the electrolytic cell series bus is introduced, and the resistance values ​​of the electrolytic cells between A1 and A3, and between B1 and B3 are calculated using the voltmeter-ammeter method.

[0042] ;

[0043] Where Ia is the DC current of the electrolytic cell bus, in A; R0 is the resistance value of the electrolytic cell at both ends of the test section, in Ω; Ua13 is the voltage difference between test connection terminals A1 and A3, in mV;

[0044] Obtaining the resistance value of the electrolytic cell allows for the determination of the ground current flowing from the cell into the ground in that section. By comparing the cell voltages Ua13 and Ub13 measured at both ends of the section, the magnitude of the ground current Ig for that section of the electrolytic cell can be obtained. Based on this, and combined with the ground voltages UaG and UbG at both ends of the section, the characteristic quantity of the ground voltage can be obtained, leading to the formula for calculating the ground insulation resistance of the section:

[0045] ;

[0046] Where R is the insulation resistance of the electrolytic cell area to ground in the section under test, in Ω; UaG and UbG are the voltages of the electrolytic cell to ground at both ends of sections A and B, in V; Ia is the DC current of the electrolytic cell bus, in A; Ua13 and Ub13 are the voltages of the cells at both ends of the test connection terminals at ends A and B of sections, in V.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A portable electrolytic cell area insulation resistance detection device characterized by comprising: The test connection terminal assembly includes two sets of test connection terminal assemblies respectively arranged at two ends of the electrolytic cell to be tested, which are connected with the voltage sensor through the wire, and the voltage sensor is connected with the terminal electrical signal; The voltage sensor samples the electrical signal and transmits it to the terminal, so that the terminal can complete the electrolytic cell resistance calibration and insulation resistance calculation according to the electrical signal.

2. The portable electrolytic bath area insulation resistance detection device according to claim 1, characterized by The test connection terminal assembly includes at least three test connection terminals, the test connection terminal includes a fastening clamp body, the fastening clamp body is connected with a screw rod body, the screw rod body is provided with a wire connecting hole, and the wire connecting hole is used for connecting with the wire.

3. The portable electrolytic bath area insulation resistance detecting device according to claim 2, characterized by The fastening clamp body is in a whole U shape, which is clamped at the bottom of the electrolytic cell metal structure at the end of the electrolytic cell to be tested.

4. The portable electrolytic bath area insulation resistance detecting device according to claim 3, characterized by The fastening clamp body side is also provided with a tightness assembly for adjusting the fastening degree of the fastening clamp body and the electrolytic cell metal structure, the tightness assembly includes a screw rod, the screw rod is arranged in the fastening clamp body side and is threadedly connected with the fastening clamp body.

5. The portable electrolytic bath area insulation resistance detecting device according to claim 4, characterized by The end of the screw rod close to the electrolytic cell metal structure and the contact surface of the fastening clamp body and the electrolytic cell metal structure are both provided with an insulation block.

6. The portable electrolytic bath area insulation resistance detecting device according to claim 2, characterized by The screw rod body is arranged below the middle part of the fastening clamp body and is threadedly connected with the fastening clamp body, and the end of the screw rod body close to the electrolytic cell metal structure is provided with a rust removal head.

7. The portable electrolytic bath area insulation resistance detecting device according to claim 2, characterized by The fastening clamp body below one side is connected with a universal joint, the universal joints between adjacent test connection terminals are connected with a scale telescopic rod, and the scale telescopic rod is provided with a wire arranging device.

8. The portable electrolytic bath area insulation resistance detecting device according to claim 4, characterized by The end of the screw rod and the screw rod body away from the electrolytic cell metal structure is provided with a rotating handle.

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