A generator carbon brush load current measuring tool
By designing a carbon brush load current measuring tool made of insulating material and using a barbed design to comb the carbon brush braids, the problems of difficult and low safety in carbon brush load current measurement were solved, achieving efficient and safe measurement results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 云南华电金沙江中游水电开发有限公司
- Filing Date
- 2025-05-26
- Publication Date
- 2026-06-12
AI Technical Summary
In existing technologies, measuring the load current of carbon brushes is difficult, has low safety, and is time-consuming and labor-intensive. In particular, when the lower layer of carbon brushes at the toner absorption device is messy, measurement is inconvenient and there is a risk of electric shock.
A generator carbon brush load current measuring tool was designed, including a carbon brush measuring component, a carbon brush wire management component, a connecting component, and a power supply component. It is made of insulating material. The carbon brush wire management component adopts a barbed design to tidy up the messy carbon brush braids. The measurement is carried out in combination with the principle of current transformer.
It improves measurement efficiency, reduces labor intensity and the risk of electric shock, and ensures the safety and accuracy of measurements.
Smart Images
Figure CN224354482U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water conservancy and hydropower technology, specifically to a generator carbon brush load current measuring tool. Background Technology
[0002] According to the 25 key requirements for preventing power production accidents issued by the National Energy Administration, ensuring the safe and stable operation of generator sets is of paramount importance. Regularly measuring the load current distribution of carbon brushes is one of the necessary measures for maintaining generator sets. During generator set operation, the carbon brushes in the slip ring chamber play a crucial role. These carbon brushes are carefully arranged in the slip ring chamber, divided into upper and lower layers: the upper layer contains positive carbon brushes, and the lower layer contains negative carbon brushes, with 45 brushes in each layer, totaling 90 brushes. These carbon brushes bear an excitation current of up to 2700A during unit operation and are key components for ensuring the normal operation of the generator. To ensure that each carbon brush carries the current evenly and avoids accidents caused by uneven current distribution, the daily shift staff needs to regularly measure the load current of these carbon brushes. During the measurement process, staff need to wear insulated gloves and use a clamp meter to measure the current of each of the four brush braids of each carbon brush.
[0003] However, in practice, some carbon brush braids may become tangled, posing an additional challenge to measurement. Workers must wear insulated gloves and manually tidy up these tangled braids to obtain accurate measurements. This is especially true for the lower layer of carbon brush braids near the three toner absorption units, where the limited space requires workers to extend more than halfway into the area to barely take measurements, making readings extremely inconvenient. Furthermore, the risk of electric shock during tidying up tangled brush braids is significantly increased. Currently used clamp meters require the entire braid to be clamped completely to obtain accurate data, which is not only time-consuming and laborious but also prone to causing worker fatigue and safety hazards during operation.
[0004] To improve measurement efficiency and safety, it is necessary to improve existing measurement methods or consider adopting more advanced measurement equipment to reduce the workload and risk of electric shock for workers while ensuring measurement accuracy. This is not only necessary to ensure the safe operation of generator sets, but also a matter of responsibility for the safety of workers. Utility Model Content
[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a generator carbon brush load current measuring tool to solve the technical problems of difficult, low-safety, time-consuming and labor-intensive carbon brush load current measurement in the field of water conservancy and hydropower technology.
[0006] To achieve the above technical objectives, the present invention provides a generator carbon brush load current measuring tool, comprising an integrally formed carbon brush measuring component, a carbon brush wire management component, a connecting component, and a power supply component; the carbon brush measuring component includes a straight portion and an arc-shaped portion; the two ends of the arc-shaped portion are integrally formed and connected to the straight portion; the two straight portions are arranged relatively parallel; the two straight portions and the arc-shaped portion form a measuring port; the end of the arc-shaped portion away from the straight portion is integrally formed and connected to the connecting component; the carbon brush wire management component is integrally formed and connected at the connection between the arc-shaped portion and the connecting component; the cross-section of the carbon brush wire management component is arc-shaped; the end of the carbon brush wire management component away from the carbon brush measuring component forms a wire management opening; the wire management opening is arranged in the opposite direction to the measuring opening; the connecting component and the carbon brush wire management component are located on the same side of the carbon brush measuring component.
[0007] Compared with the prior art, the beneficial effects of this utility model include:
[0008] Time-saving, labor-saving, and highly efficient: The carbon brush wire management component in the generator carbon brush load current measuring tool provided by this utility model adopts a barbed design to tidy up messy carbon brush braids, avoiding the risk of electric shock to the measuring personnel during carbon brush operation, shortening the carbon brush current carrying capacity measurement time, and improving work efficiency. High safety performance: The carbon brush measuring component, carbon brush wire management component, connecting component, and power supply component in the generator carbon brush load current measuring tool provided by this utility model are all custom-made from epoxy resin material with good insulation properties, greatly improving the safety of the personnel. Attached Figure Description
[0009] Figure 1 This is a top view of the generator carbon brush load current measuring tool provided by this utility model.
[0010] Figure 2 This is a schematic diagram of the upper end structure of the generator carbon brush load current measuring tool provided by this utility model;
[0011] Figure 3 This is a schematic diagram of the lower end and internal structure of the generator carbon brush load current measuring tool provided by this utility model. Detailed Implementation
[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0013] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0015] Please see Figure 1 , Figure 2 , Figure 3 This embodiment provides a generator carbon brush load current measuring tool, including an integrally formed carbon brush measuring component 1, a carbon brush wire management component 2, a connecting component 3, and a power supply component 4.
[0016] Furthermore, the carbon brush measuring component 1 includes a straight section 11 and an arc-shaped section 12. The two ends of the arc-shaped section 12 are integrally formed and connected to the straight section 11. The two straight sections 11 are arranged in parallel relative to each other. The two straight sections 11 and the arc-shaped section 12 form a measuring port 1a. The end of the arc-shaped section 12 away from the straight section 11 is integrally formed and connected to the connecting component 3. The carbon brush filament management component 2 is integrally formed and connected at the connection between the arc-shaped section 12 and the connecting component 3. The cross-section of the carbon brush filament management component 2 is arc-shaped. The end of the carbon brush filament management component 2 away from the carbon brush measuring component 1 forms a filament management port 2a. The filament management port 2a is arranged in the opposite direction to the measuring port 1a. The connecting component 3 and the carbon brush filament management component 2 are located on the same side of the carbon brush measuring component 1.
[0017] Specifically, the cross-section of the carbon brush measuring component 1 is U-shaped.
[0018] Specifically, when it is necessary to measure the current carrying capacity of the carbon brush during operation, the carbon brush braid should be placed in the measuring port 1a of the carbon brush measuring component 1.
[0019] Specifically, the carbon brush measuring component 1, carbon brush wire organizing component 2, connecting component 3 and power supply component 4 are each provided with an upper end and a lower end, wherein the upper end and the lower end are detachably fixedly connected by screws, and a cavity is formed between the upper end and the lower end.
[0020] Specifically, when measuring the current carrying capacity of the carbon brush during operation, if the carbon brush braid is too messy to be placed in the measuring port 1a of the carbon brush measuring component 1, the messy carbon brush braid is placed in the cable management port 2a. At the same time, the operator forcefully drags the messy carbon brush braid to a measurable position and then places the carbon brush braid back into the measuring port of the carbon brush measuring component 1. This allows for precise measurement of the carbon brush load current and control of its operation, avoiding the risk of electric shock to the measuring personnel during carbon brush operation, shortening the carbon brush current carrying capacity measurement time, and improving work efficiency.
[0021] Furthermore, the power supply component 4 is integrally formed and connected to the end of the connecting component 3 away from the carbon brush measuring component 1. The upper end of the power supply component 4 is provided with a display screen hole 4a and a power button hole 4b, and the end of the power supply component 4 away from the connecting component 3 is provided with a charging hole 4c.
[0022] Furthermore, the inner cavity of the power supply component 4 is provided with a measurement module 8, a display screen 5, a power button 6, an energy storage unit 9, and a charging interface 7. The measurement module 8, the display screen 5, the power button 6, the energy storage unit 9, and the charging interface 7 are connected by wires. The display screen 5 is arranged opposite to the display screen hole 4a so that the operator can view the current value through the display screen 5. The power button 6 is arranged opposite to the power button hole 4b, and the charging interface 7 is arranged opposite to the charging hole 4c.
[0023] In this embodiment, the working principle of the measurement module 8 adopts existing technologies, such as the current transformer (CT) principle, the Hall effect sensor principle, and the Rogowski coil principle.
[0024] Preferably, the display screen 5 is an LED display screen.
[0025] Preferably, the energy storage unit 9 is a 3.7V 400mA lithium battery.
[0026] Preferably, the charging interface 7 is a Type-C charging interface.
[0027] Furthermore, the inner cavity of the carbon brush measuring component 1 is provided with an induction coil, and the induction coil 10 is connected to the measuring module 8 through a wire passing through the inner cavity of the connecting component 3.
[0028] Furthermore, the outer peripheral wall of the power supply component 4 near the charging hole 4c is provided with anti-slip texture 4d to prevent slippage during operation.
[0029] Furthermore, the carbon brush measuring component 1, carbon brush wire management component 2, connecting component 3, and power supply component 4 are all custom-made from insulating materials.
[0030] Preferably, the carbon brush measuring component 1, carbon brush wire management component 2, connecting component 3, and power supply component 4 are all made of epoxy resin insulating material. Epoxy resin has high dielectric strength and can maintain good insulation performance under high voltage environment, ensuring the safety of the staff.
[0031] Working Principle: The generator carbon brush load current measuring tool provided by this utility model includes an integrally formed carbon brush measuring component 1, a carbon brush wire guiding component 2, a connecting component 3, and a power supply component 4. The carbon brush measuring component 1 includes a straight portion 11 and an arc-shaped portion 12. The two ends of the arc-shaped portion 12 are integrally connected to the straight portion 11. The two straight portions 11 are arranged in parallel relative to each other, and the two straight portions 11 and the arc-shaped portion 12 form a measuring port 1a. The end of the arc-shaped portion 12 away from the straight portion 11 is integrally connected to the connecting component 3. The carbon brush wire guiding component 2 is integrally connected at the connection between the arc-shaped portion 12 and the connecting component 3. The cross-section of the carbon brush wire guiding component 2 is arc-shaped. The end of the carbon brush wire guiding component 2 away from the carbon brush measuring component 1 forms a wire guiding port 2a. The wire guiding port 2a is arranged in the opposite direction to the measuring port 1a. The connecting component 3 and the carbon brush wire guiding component 2 are located on the same side of the carbon brush measuring component 1.
[0032] Specifically, when the carbon brush is in a convenient measurement position, to measure the current carrying capacity of the carbon brush during operation, the operator only needs to hold the power supply component 4 of the generator carbon brush load current measuring tool, place the brush braid of the carbon brush in the measuring port of the carbon brush measuring component 1, press the power button 6, keep the generator carbon brush load current measuring tool still for a few seconds, and wait for the display screen to display the data, which means the measurement is complete.
[0033] When the carbon brush is located in an inconvenient position for measurement, such as the lower carbon brush in the toner absorption device, when measuring the current carrying capacity of the carbon brush during operation, the messy carbon brush braid is placed in the cable management port 2a. At the same time, the operator forcefully drags the messy carbon brush braid to a measurable position and then places the carbon brush braid back into the measurement port 1a of the carbon brush measuring component 1. This enables precise measurement of the carbon brush load current and control of its operation, avoids the risk of electric shock to the measuring personnel during carbon brush operation, shortens the carbon brush current carrying capacity measurement time, and improves work efficiency.
[0034] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.
Claims
1. A generator carbon brush load current measuring tool, characterized in that, The device includes an integrally formed carbon brush measuring component, a carbon brush wire guiding component, a connecting component, and a power supply component. The carbon brush measuring component includes a straight portion and an arc-shaped portion. The two ends of the arc-shaped portion are integrally connected to the straight portion. The two straight portions are arranged parallel to each other. The two straight portions and the arc-shaped portion form a measuring port. The end of the arc-shaped portion away from the straight portion is integrally connected to the connecting component. The carbon brush wire guiding component is integrally connected at the connection between the arc-shaped portion and the connecting component. The cross-section of the carbon brush wire guiding component is arc-shaped. The end of the carbon brush wire guiding component away from the carbon brush measuring component forms a wire guiding opening. The wire guiding opening is arranged in the opposite direction to the measuring opening. The connecting component and the carbon brush wire guiding component are located on the same side of the carbon brush measuring component.
2. The generator carbon brush load current measuring tool according to claim 1, characterized in that, The power supply component and the connecting component are integrally formed and connected at the end away from the carbon brush measuring component; the upper end of the power supply component has a display screen hole and a power button hole; the end of the power supply component away from the connecting component has a charging hole.
3. The generator carbon brush load current measuring tool according to claim 2, characterized in that, The power supply component has a measurement module, a display screen, a power button, an energy storage unit, and a charging interface inside its cavity; the measurement module, display screen, power button, energy storage unit, and charging interface are connected by wires; the display screen and the display screen hole are arranged opposite each other so that the operator can view the current value through the display screen; the power button and the power button hole are arranged opposite each other; the charging interface and the charging hole are arranged opposite each other.
4. The generator carbon brush load current measuring tool according to claim 3, characterized in that, The inner cavity of the carbon brush measuring component is equipped with an induction coil; the induction coil is connected to the measuring module through a wire passing through the inner cavity of the connecting component.
5. The generator carbon brush load current measuring tool according to claim 4, characterized in that, The outer peripheral wall of the power supply component near the charging port has anti-slip texture to prevent slipping.
6. The generator carbon brush load current measuring tool according to claim 5, characterized in that, The carbon brush measuring component, carbon brush wire management component, connecting component, and power supply component are all custom-made from insulating materials.