Capacitor residual charge sound-light alarm device

Abstract

The invention relates to the technical field of capacitor discharge, in particular to a capacitor residual charge sound-light alarm device which comprises a connection module, a detection module and an alarm module. The connecting module is used for connecting a capacitor through an operating rod; the detection module is used for being connected with the connection module through a detection unit and detecting the capacitor, the detection unit is two direct-current ammeters which are connected in parallel and have different measuring ranges, multiple groups of resistors and a controller are connected in series at the same time, and a discharge loop is formed by the detection unit, a discharge connector and a ground wire; the discharge connector is arranged at the end part of the operating rod and used for connecting a capacitor; and the alarm module is used for giving a prompt through an audible and visual alarm when the current value of the residual charge in the discharge loop exceeds a threshold value. The method can accurately determine that the capacitor is fully discharged, practically ensures that the discharge time is shortened while workers are not damaged by residual charges, and further shortens the time required by the maintenance work of the capacitor.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor discharge, and in particular to a capacitor residual charge sound and light alarm device. Background Art

[0002] In daily work, when the capacitive equipment (capacitors, cables, etc.) in the substation is turned over for maintenance, especially when the heating defect causes the capacitor bank bus to fuse, the regulations stipulate that the capacitive equipment needs to be fully discharged one by one (phase by phase) for multiple times. The main purpose is to protect the staff from electric shock injuries caused by the residual charge inside the capacitive equipment being discharged through the circuit formed by the human body and the ground when touching the capacitive equipment. Depending on the capacity of a single capacitor on site, the time required for discharge is also different. Therefore, it is necessary to accurately define whether the capacitor has been fully discharged, effectively ensure that the staff is not harmed by the residual charge, and shorten the discharge time, thereby shortening the time required for capacitor maintenance work. Summary of the invention

[0003] The purpose of the present invention is to provide a capacitor residual charge sound and light alarm device, which can accurately define whether the capacitor has been fully discharged, effectively ensure that the staff is not harmed by the residual charge, and shorten the discharge time, thereby shortening the time required for capacitor maintenance work.

[0004] In order to achieve the above object, a capacitor residual charge sound and light alarm device is provided, comprising a connection module, a detection module and an alarm module;

[0005] Connection module: used to connect capacitors via operating levers;

[0006] Detection module: used to connect the connection module through the detection unit and detect the capacitor. The detection unit is two DC ammeters with different ranges connected in parallel, and multiple groups of resistors and controllers are connected in series, and a discharge loop is formed with the discharge connector and the grounding wire; the discharge connector is set at the end of the operating rod for connecting the capacitor; the controller is used to analyze and determine whether the current current value is lower than the maximum range of the small-range DC ammeter according to the detection result of the large-range DC ammeter of the two DC ammeters. If so, switch to the small-range DC ammeter to detect the current current value;

[0007] Alarm module: used to give a prompt through an audible and visual alarm when the current value of the residual charge in the discharge circuit exceeds the threshold.

[0008] Furthermore, the operating rod is a telescopic rod, including an outer rod tube and an inner rod tube, the outer rod tube has a plurality of symmetrically distributed limiting holes at equal distances, and the inner rod tube has a plurality of symmetrically distributed elastic snaps at equal distances. When in use, the elastic snaps on the inner and outer rods are adjusted as needed to cooperate with the corresponding limiting holes according to the distance from the capacitor to control the length of the telescopic rod.

[0009] Furthermore, an insulating handle is provided at the operating end of the telescopic rod.

[0010] Furthermore, it also includes:

[0011] Power module: used to use the lithium battery as a power source and electrically connect the lithium battery to the charging circuit;

[0012] Power indicator module: used to detect the power level of the power module and provide an indication based on the remaining power.

[0013] Furthermore, it also includes:

[0014] Display module: used to display the current value currently detected by the ammeter through the display, and also used to display the remaining power detected by the power indication module through the power indicator light on the display.

[0015] Furthermore, the sound and light alarm includes a monochrome indicator light and a buzzer. When the current value of the residual charge in the discharge circuit exceeds a threshold value, the monochrome indicator light turns on and the buzzer sounds.

[0016] Furthermore, the resistors are all variable resistors, and a resistance measuring meter is connected to the resistors. The resistance measuring meter is electrically connected to the controller. The controller searches for historical discharge time curve data of the capacitor from the storage module according to the resistance value of the resistance measuring meter, and analyzes the remaining discharge time according to the current current value of the DC ammeter.

[0017] Principles and advantages:

[0018] 1. Safety: This solution directly reflects the degree of danger of residual charge inside the capacitor to the human body in the form of sound and light signals of the sound and light alarm. It can also more intuitively show whether the capacitor still has residual charge to ensure the safety of personnel. Two DC ammeters with different ranges are used to form two discharge circuits. When the direct discharge current value is lower than the maximum range of the small-range DC ammeter, the small-range DC ammeter is connected to complete the calibration. When the direct discharge current value is lower than or higher than the maximum range of the small-range DC ammeter, the large-range DC ammeter is used to complete the calibration to ensure the safety of the equipment.

[0019] 2. Speed: It eliminates the time for testing electricity after discharge, and improves the maintenance efficiency. When in use, adjust the elastic snaps on the inner and outer rods to match the corresponding limit holes as needed, adjust the length of the telescopic rod, and you can easily connect the discharge connector to the capacitor. When the discharge is completed, the discharge connector can also be easily removed from the capacitor. At the same time, the use of a telescopic rod makes it easy to quickly retract the operating rod.

[0020] 3. Comprehensive benefits: It improves the overall efficiency and safety of power facility maintenance, reduces operating costs, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a logic block diagram of a capacitor residual charge sound and light alarm device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following is further described in detail through specific implementation methods:

[0023] Embodiment 1

[0024] A capacitor residual charge sound and light alarm device, basically as Figure 1 As shown, it includes a connection module, a detection module, an alarm module, a power module, a power indicator module and a display module.

[0025] Connection module: used to connect the capacitor through an operating rod; the operating rod is a telescopic rod, including an outer rod tube and an inner rod tube, the outer rod tube has multiple limit holes symmetrically distributed at equal distances, and the inner rod tube has multiple elastic snaps symmetrically distributed at equal distances. When in use, the elastic snaps on the inner and outer rods are adjusted to match the corresponding limit holes according to the distance from the capacitor to adjust the length of the telescopic rod. The operating end of the telescopic rod is provided with an insulating handle.

[0026] Detection module: used to connect the connection module through the detection unit and detect the capacitor. The detection unit is two DC ammeters of different ranges in parallel, and multiple groups of resistors and controllers are connected in series (DC ammeters, multiple groups of resistors and controllers constitute the detection component), and form a discharge loop with the discharge connector and the grounding wire; the discharge connector is set at the end of the operating rod for connecting the capacitor; the discharge connector is made of copper wire or iron wire, and the contact with the capacitor is in the form of a hook. In this embodiment, the resistors are all variable resistors, and there are two variable resistors, which are set in series. One end of the grounding wire is connected between the two variable resistors, and the two parallel DC ammeters of different ranges are set between the variable resistor and the grounding wire to form a double discharge loop. The controller is used to analyze and judge whether the current current value is lower than the maximum range of the small-range DC ammeter according to the detection results of the large-range DC ammeter in the two DC ammeters. If so, switch to the small-range DC ammeter to detect the current current value; in this embodiment, the two DC ammeters of different ranges are respectively connected in series with relay switches, which are used to switch the two DC ammeters of different ranges for current detection.

[0027] Alarm module: used to give a prompt through an audible and visual alarm when the current value of the residual charge in the discharge circuit exceeds the threshold value. The audible and visual alarm includes a monochrome indicator light and a buzzer. When the current value of the residual charge in the discharge circuit exceeds the threshold value, the monochrome indicator light turns on and the buzzer sounds. In this embodiment, the monochrome indicator light is a red monochrome light. When the current value of the residual charge in the discharge circuit exceeds the threshold value, the audible and visual alarm forms a loop, the red indicator light turns on, and the buzzer sounds, which serves as a warning. When the red indicator light is not on and the buzzer does not sound, it indicates that the current intensity has reached the safe current for the human body.

[0028] Power indicator module: used to detect the power level of the power module and provide an indication based on the remaining power.

[0029] Display module: used to display the current value currently detected by the ammeter through the display, and also used to display the remaining power detected by the power indicator module through the preset power indicator pattern on the display. The preset power indicator pattern on the display module is similar to the battery display device of a mobile phone, divided into 4 grids. When the number of grids in the indicator is greater than 1 grid, it will be displayed in green, indicating that the power is sufficient. When the number of grids is 1, it indicates that the power is low and needs to be charged. When there is no grid displayed, it means that the power is too low and cannot be used for power testing.

[0030] Power module: used to use the lithium battery as a power source and electrically connect the lithium battery to the charging circuit; in this embodiment, the lithium battery is used to power the monochrome indicator light, buzzer, and display.

[0031] 1. Safety: This solution directly reflects the danger level of residual charge inside the capacitor to the human body through the form of sound and light signals of the sound and light alarm. It can also more intuitively show whether the capacitor still has residual charge to ensure personnel safety.

[0032] 2. Speed: It eliminates the time of testing electricity after discharge and improves maintenance efficiency.

[0033] 3. Comprehensive benefits: It improves the overall efficiency and safety of power facility maintenance, reduces operating costs, and has significant economic and social benefits.

[0034] Embodiment 2

[0035] The difference between the second embodiment and the first embodiment is that a resistance measuring meter is connected to the resistor, and the resistance measuring meter is electrically connected to the controller. The controller searches the historical discharge time curve data of the capacitor from the storage module according to the resistance value of the resistance measuring meter, and analyzes the remaining discharge time according to the current current value of the DC ammeter. This solution analyzes the remaining discharge time by the current current value, and can more intuitively display the discharge working time.

[0036] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Capacitor residual charge sound and light alarm device, characterized by: It includes a connection module, a detection module and an alarm module; Connection module: used to connect capacitors via operating levers; Detection module: used to connect the connection module through the detection unit and detect the capacitor. The detection unit is two DC ammeters with different ranges connected in parallel, and multiple groups of resistors and controllers are connected in series, and a discharge loop is formed with the discharge connector and the grounding wire; the discharge connector is set at the end of the operating rod for connecting the capacitor; the controller is used to analyze and determine whether the current current value is lower than the maximum range of the small-range DC ammeter according to the detection result of the large-range DC ammeter of the two DC ammeters. If so, switch to the small-range DC ammeter to detect the current current value; Alarm module: used to give a prompt through an audible and visual alarm when the current value of the residual charge in the discharge circuit exceeds the threshold.

2. The capacitor residual charge sound and light alarm device according to claim 1, characterized in that: The operating rod is a telescopic rod, including an outer rod tube and an inner rod tube. The outer rod tube has a plurality of symmetrically distributed limiting holes at equal distances, and the inner rod tube has a plurality of symmetrically distributed elastic snaps at equal distances. When in use, the elastic snaps on the inner and outer rods are adjusted as needed to match the corresponding limiting holes according to the distance from the capacitor to control the length of the telescopic rod.

3. The capacitor residual charge sound and light alarm device according to claim 2, characterized in that: An insulating handle is provided at the operating end of the telescopic rod.

4. The capacitor residual charge sound and light alarm device according to claim 1, characterized in that: Also includes: Power module: used to use the lithium battery as a power source and electrically connect the lithium battery to the charging circuit; Power indicator module: used to detect the power level of the power module and provide an indication based on the remaining power.

5. The capacitor residual charge sound and light alarm device according to claim 4, characterized in that: Also includes: Display module: used to display the current value currently detected by the ammeter through the display, and also used to display the remaining power detected by the power indication module on the display through a preset power indicator light pattern.

6. The capacitor residual charge sound and light alarm device according to claim 1, characterized in that: The sound and light alarm comprises a monochromatic indicator light and a buzzer. When the current value of the residual charge in the discharge circuit exceeds a threshold value, the monochromatic indicator light turns on and the buzzer sounds.

7. The capacitor residual charge sound and light alarm device according to claim 1, characterized in that: The resistors are all variable resistors, and a resistance measuring meter is connected to the resistors. The resistance measuring meter is electrically connected to a controller. The controller searches for historical discharge time curve data of the capacitor from a storage module according to the resistance value of the resistance measuring meter, and analyzes the remaining discharge time according to the current current value of the DC ammeter.

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