Portable rectifier current sharing detection device

Abstract

The utility model relates to the technical field of detection devices, in particular to a portable rectifier current-sharing detection device, which comprises a first handheld measuring column, a second handheld measuring column and a measuring instrument, and is characterized in that the first handheld measuring column comprises a first measuring probe and a first measuring lead; the second handheld measuring column comprises a second measuring probe and a second measuring lead, one end of the measuring instrument is connected with one end of the first measuring probe through the first measuring lead, and the other end of the first measuring probe is connected with one end of the measured device; the other end of the measuring instrument is connected with one end of a second measuring probe through a second measuring lead, and the other end of the second measuring probe is connected with the other end of the measured device. The objective of the utility model is to provide a portable current-sharing detection device for regularly detecting the current of each rectifying element of a running rectifier, so that the current-sharing value of each element can be accurately detected, and the problem of short-circuit explosion of the rectifier caused by the use of an online current-sharing detection device is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, and in particular to a portable rectifier current sharing detection device. Background Art

[0002] Each rectifier in the electrolytic aluminum DC power supply system has at least six rectifier arms, consisting of rectifier elements, fast-acting fuses, and busbars. A rectifier connected in parallel with the same phase consists of 12 rectifier arms, forming six in-phase, anti-parallel rectifier arm assemblies. A rectifier is a power unit composed of six rectifier arms (or six in-phase, anti-parallel rectifier arm assemblies) and includes electrical and non-electrical connections, insulation, cooling pipes and radiators, rectifier tube elements, a compression mechanism, a fast-acting fuse assembly, an overvoltage absorber, water temperature and pressure detection and indicator instruments, and a fast-acting fuse damage detection and indication signal. Its function is to convert AC into DC, providing a powerful DC current to the electrolytic cell.

[0003] In order to ensure the safe and smooth operation of the rectifier, it is necessary to detect the current of the running rectifier elements.

[0004] The commonly used detection method currently is to install a current sensor on each component of the rectifier cabinet. Each rectifier cabinet is managed by a current-sharing test device, which enables real-time monitoring of the current of each component in the rectifier cabinet and visual management of the operating status. This allows rectifier substation operators to detect and address problems with components in the rectifier cabinet early and make adjustments based on the provided measurement data, thereby improving the safety and reliability of the rectifier cabinet operation and improving the rectifier cabinet's rectification efficiency. At the same time, the rectifier cabinet current-sharing monitoring device can also transmit and exchange the collected data signals with the host computer in real time via RS-485 communication, realizing centralized monitoring and control of the operating parameters of the rectifier cabinet's rectifier components, ensuring the safe and stable operation of rectifier units in the electrolytic aluminum industry.

[0005] However, since the existing online current sharing detection device is usually fixedly installed in the system as part of the system, when it fails, it is very easy to cause the rectifier to short-circuit and explode, seriously threatening the power supply safety of the electrolytic aluminum DC system. Utility Model Content

[0006] The purpose of the utility model is to provide a portable rectifier current sharing detection device to solve the problem in the background art that an online current sharing detection device is prone to failure and causes a rectifier short circuit explosion.

[0007] To achieve the above-mentioned objectives, the technical solution of the first aspect of the present invention provides a portable rectifier current sharing detection device, comprising a first handheld measuring column, a second handheld measuring column, and a measuring instrument, wherein the first handheld measuring column comprises a first measuring probe and a first measuring wire, and the second handheld measuring column comprises a second measuring probe and a second measuring wire, wherein:

[0008] One end of the measuring instrument is connected to one end of a first measuring probe via a first measuring wire, and the other end of the first measuring probe is connected to one end of the device under test;

[0009] The other end of the measuring instrument is connected to one end of a second measuring probe through a second measuring wire, and the other end of the second measuring probe is connected to the other end of the device under test.

[0010] Furthermore, the measuring instrument is provided with a first terminal and a second terminal, wherein the first measuring wire is connected to the measuring instrument via the first terminal, and the second measuring wire is connected to the measuring instrument via the second terminal.

[0011] Furthermore, the handheld safety sheath is made of insulating material.

[0012] Furthermore, it also includes an insulating tube, which includes a first insulating tube and a second insulating tube. The first measuring wire passes through the inside of the first insulating tube, and the second measuring wire passes through the inside of the second insulating tube.

[0013] Furthermore, it also includes a handheld safety sheath, which is arranged on the side of the insulating tube close to the measuring instrument.

[0014] Furthermore, it also includes a data processing unit, which is arranged inside the measuring instrument and is used to receive current data transmitted from the first measuring wire and the second measuring wire to evaluate the current balance.

[0015] Furthermore, it also includes a data storage device, which is arranged in the measuring instrument and is used to record historical detection data.

[0016] Furthermore, the measuring instrument is provided with a display screen for displaying the detected current value and current balance.

[0017] Furthermore, it also includes a power supply module, which is arranged in the measuring instrument and is used to supply power to the measuring instrument.

[0018] The beneficial effects of the utility model include:

[0019] A portable current-sharing detection device is used to regularly detect the current of each rectifier element of the running rectifier. It can accurately detect the current-sharing value of each component and compare it with the previous current-sharing detection data to ensure the normal operation of the rectifier. At the same time, the portable current-sharing detection device is separated from the entire system device and can perform temporary current detection at different locations. It does not need to be integrated with the control system and can be operated independently. This also avoids the risk of rectifier short-circuit explosion caused by the use of an online current-sharing detection device, thereby ensuring the power supply safety of the electrolytic aluminum DC system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of a portable rectifier current sharing detection device provided in an embodiment of the present utility model;

[0022] Icon: 1-first measuring probe, 2-second measuring probe, 3-first measuring wire, 4-second measuring wire, 5-first insulating tube, 6-second insulating tube, 7-first hand-held measuring column, 8-second hand-held measuring column, 9-hand-held safety sheath, 10-first terminal, 11-second terminal, 12-measuring instrument. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. It should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the figures, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] See Figure 1As shown, the embodiment of the present utility model provides the following technical solutions:

[0026] A portable current sharing detection device is provided to periodically detect the current of each rectifier element of the rectifier during operation. Figure 1 As shown, a first handheld measuring column 7, a second handheld measuring column 8 and a measuring instrument 12, wherein the first handheld measuring column 7 includes a first measuring probe 1 and a first measuring wire 3, and the second handheld measuring column 8 includes a second measuring probe 2 and a second measuring wire 4. When the portable current sharing detection device detects the rectifier element, it first checks whether the two measuring probes and the measuring wires are damaged, then turns on the measuring instrument 12 to check whether it is working normally, and then connects the first measuring probe 1 and the second measuring probe 2 to different output ports of the rectifier element to be tested, respectively, and transmits the current signals output from the corresponding rectifier element output ports to the measuring instrument 12 through the first measuring wire 3 and the second measuring wire 4. The measuring instrument 12 has a built-in data processing unit, and the microprocessor of the data processing unit processes and analyzes the received electrical signals to obtain the current sharing degree, and judges whether the current sharing meets the operating requirements and whether there is a fault in the component.

[0027] The principle is to use the two measuring end probes of the current equalization detection device to contact the upper and lower ends of the component to be tested respectively, and obtain the measured value I through the back-end measuring instrument. n , I max . And the average flow K is calculated n By comparing the average current of each phase arm of each rectifier unit, we can know whether the average current meets the operating requirements and whether there is any fault in the component.

[0028] Specifically, the calculation formula for average flow is as follows:

[0029] ∑I n =I1+I2+…+I n

[0030] K n =∑I n / (n*I max )

[0031] Where n represents the number of parallel elements; I represents the current; ∑I n Represents the total current of the parallel components in each phase (arm); I max Indicates the maximum current value of the parallel components in the phase (arm); K n Indicates the average flow rate.

[0032] Specifically, the measuring instrument 12 is provided with a plurality of terminals, in this embodiment there are two, a first terminal 10 and a second terminal 11, wherein the first terminal 10 contacts one end of the first measuring wire 3, and the second terminal 11 contacts one end of the second measuring wire 4. The terminals serve as the electrical signal input port of the measuring instrument 12 to transmit the current signals of the upper and lower ends of the measured element transmitted by the two measuring end probes.

[0033] Specifically, the first measuring wire 3 and the second measuring wire 4 are respectively covered with insulating tubes. In this embodiment, the insulating tubes are completely covered on the measuring wires. The insulating tubes are made of insulating material, which can further improve the detection safety and stability.

[0034] In this embodiment, the handheld safety sheath 9 is covered on the insulating tube slightly closer to the measuring instrument 12. The handheld safety sheath 9 is eight to fifteen centimeters long, which is convenient for the operator to hold and operate. The handheld safety sheath 9 is made of insulating material, specifically insulating rubber material, which can ensure that the operator will not get an electric shock accident due to contact with the wire during operation, further reducing the risk and ensuring the personal safety of the staff.

[0035] In this embodiment, the measuring instrument 12 is equipped with a data storage card, which receives the analysis results and measurement data of the data processing unit and records the detection results and historical detection of each rectifier element.

[0036] In this embodiment, the measuring instrument 12 is provided with a display screen. After receiving the electrical signal, the measuring instrument 12 displays the current information on the display screen and displays the current distribution degree obtained after analysis.

[0037] In this embodiment, the display screen adopts a miniLED display screen.

[0038] In this embodiment, a power supply module is also included which is arranged in the measuring instrument.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A portable rectifier current sharing detection device, comprising a first handheld measuring column (7), a second handheld measuring column (8) and a measuring instrument (12), characterized in that: The first handheld measuring column (7) comprises a first measuring probe (1) and a first measuring wire (3), and the second handheld measuring column (8) comprises a second measuring probe (2) and a second measuring wire (4), wherein: One end of the measuring instrument (12) is connected to one end of a first measuring probe (1) via a first measuring wire (3), and the other end of the first measuring probe (1) is connected to one end of a device under test; The other end of the measuring instrument (12) is connected to one end of a second measuring probe (2) via a second measuring wire (4), and the other end of the second measuring probe (2) is connected to the other end of the device under test.

2. A portable rectifier current sharing detection device according to claim 1, characterized in that: The measuring instrument (12) is provided with a first terminal (10) and a second terminal (11), wherein the first measuring wire (3) is connected to the measuring instrument (12) via the first terminal (10), and the second measuring wire (4) is connected to the measuring instrument (12) via the second terminal (11).

3. The portable rectifier current sharing detection device according to claim 1, characterized in that: The device further comprises an insulating tube, wherein the insulating tube comprises a first insulating tube (5) and a second insulating tube (6), wherein the first measuring wire (3) passes through the interior of the first insulating tube (5), and the second measuring wire (4) passes through the interior of the second insulating tube (6).

4. A portable rectifier current sharing detection device according to claim 3, characterized in that: It also includes a handheld safety sheath (9), which is sleeved on a side of the insulating tube close to the measuring instrument (12).

5. A portable rectifier current sharing detection device according to claim 4, characterized in that: The handheld safety sheath (9) is made of insulating material.

6. The portable rectifier current sharing detection device according to claim 1, characterized in that: It also includes a data processing unit, which is arranged inside the measuring instrument (12) and is used to receive current data transmitted from the first measuring wire (3) and the second measuring wire (4) to evaluate the current balance.

7. The portable rectifier current sharing detection device according to claim 1, characterized in that: It also includes a data storage device, which is arranged in the measuring instrument (12) and is used to record historical detection data.

8. The portable rectifier current sharing detection device according to claim 1, characterized in that: The measuring instrument (12) is provided with a display screen for displaying the detected current value and current balance.

9. The portable rectifier current sharing detection device according to claim 1, characterized in that: It also includes a power supply module, which is arranged in the measuring instrument (12) and is used to supply power to the measuring instrument (12).

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