Anti-clogging layer resistance measuring device for stator bars

Abstract

The application relates to a device for measuring the resistance of a corona shield layer of a stator bar, comprising a measuring electrode and a measuring assembly. The device comprises two measuring electrodes, both of which are used to contact the corona shield layer; the measuring assembly comprises a meter body, a resistance measuring component and an alignment piece, at least part of the resistance measuring component is arranged in the meter body, the resistance measuring component is electrically connected with the two measuring electrodes, both of the measuring electrodes are connected with the meter body, at least one of the two measuring electrodes can slide relative to the meter body, so that the distance between the two measuring electrodes can be adjusted, the alignment piece is provided with two alignment pieces, and the alignment pieces are arranged on the measuring electrodes one by one. A scale part is arranged on the meter body, and the scale part is used to indicate the distance between the two measuring electrodes.

Description

Technical Field

[0001] This application relates to the field of stator bar manufacturing technology for generators, and in particular to a device for measuring the resistance of the anti-corona layer of stator bars. Background Technology

[0002] To eliminate potential differences in the stator bars during operation, large generators require a low-resistance anti-corona layer to be applied or wrapped around the wide and narrow surfaces of the stator bar slots to control the surface resistance of the stator bars within a certain range. However, due to manufacturing processes, the resistance of the anti-corona layer may be too low or too high. If the resistance is too low, the current in the anti-corona layer can be too large, leading to severe overheating of the stator bars and core. If the resistance is too high, the potential in the stator bar slots will be too high, resulting in stator bar slot discharge and electro-corrosion, damaging the main insulation layer of the stator bars.

[0003] To check whether the resistance of the anti-corona layer on the surface of the stator bar is within a suitable range, the resistance of the surface of the stator bar slot needs to be measured before the stator bar is embedded into the core, so as to evaluate whether the process quality of the anti-corona layer is good.

[0004] A common method for measuring the resistance of the anti-corona layer on the surface of stator bars is to use metal materials such as tin foil or aluminum foil to make measuring electrodes. These electrodes are then connected to the two probes of an ohmmeter or multimeter (selected on the ohm setting) via wires. The measuring electrodes are then manually pressed against different positions on the stator bar surface for measurement. However, this method has the following drawbacks: First, it requires the operator to hold the measuring electrodes in contact with the bar for electrical connection. Prolonged measurement can cause hand tremors, leading to poor contact between the electrodes and the bar, resulting in significant measurement errors. Second, maintaining a consistent distance between the two measuring electrodes during multiple measurements also contributes to large errors. Furthermore, the operator needs to hold both measuring electrodes and press them firmly against the stator bar surface for extended periods, which is tiring and inefficient. Utility Model Content

[0005] Therefore, it is necessary to provide a device for measuring the resistance of the anti-corona layer of stator bars, which is convenient for measuring the resistance value of the anti-corona layer and has high measurement accuracy.

[0006] A device for measuring the anti-corona layer resistance of stator bars is provided, comprising:

[0007] Measuring electrodes, wherein two measuring electrodes are provided, both of which are used to contact the anti-glare layer; and

[0008] A measuring assembly includes a meter body, a resistance measuring component, and alignment members. At least a portion of the resistance measuring component is disposed in the meter body and is electrically connected to two measuring electrodes. Both measuring electrodes are connected to the meter body, and at least one of the measuring electrodes is slidable relative to the meter body to adjust the distance between the two measuring electrodes. Two alignment members are provided, each corresponding to one of the measuring electrodes. The meter body is provided with a scale portion for indicating the distance between the measuring electrodes.

[0009] In one embodiment, the watch body has an internal cavity, and its outer surface has a first side and a second side. The first side has a first adjustment hole, and the second side has a second adjustment hole. Both the first and second adjustment holes communicate with the cavity and the outside of the watch body, and their length directions are parallel. The scale portion is disposed on the second side. The measuring electrode includes a first segment and a second segment disposed at an angle to the first segment. The first segment is a conductor and is electrically connected to the resistance measuring component. One end of the first segment and one end of the second segment are disposed in the cavity and connected to each other. The end of the first segment away from the second segment passes through the first adjustment hole and protrudes from the first side for contacting the anti-corona layer. The end of the second segment away from the first segment passes through the second adjustment hole and protrudes from the second side. The alignment member is disposed at the portion of the second segment protruding from the second side.

[0010] In one embodiment, the measuring electrode further includes a conductive terminal disposed in the cavity and connected to the second segment. The conductive terminal is used to contact the resistance measuring component. The first segment includes a conductive elastic element and an electrode terminal. One end of the conductive elastic element is connected to the electrode terminal, and the other end is electrically connected to the conductive terminal.

[0011] In one embodiment, the conductive elastic element includes a telescopic sleeve and a conductive elastomer. The telescopic sleeve is axially telescopic and is connected between the second segment and the electrode terminal. At least a portion of the conductive elastomer is disposed inside the telescopic sleeve, and the conductive elastomer is elastically telescopic within the telescopic sleeve. One end of the conductive elastomer is connected to the electrode terminal, and the other end is electrically connected to the conductive terminal.

[0012] In one embodiment, the resistance measuring component includes a conductive sheet and a resistance measuring circuit both disposed inside the body of the meter. At least a portion of the conductive sheet is disposed in the cavity for contacting the conductive terminal, and the resistance measuring circuit is connected to the conductive sheet.

[0013] In one embodiment, a locking member is also included, which is disposed on the side of the alignment member facing away from the second side, and is sleeved on the second segment and threadedly connected to the second segment.

[0014] In one embodiment, a display screen disposed on the meter body is further included, the display screen being electrically connected to the resistance measuring component, the display screen being used to display the output result of the resistance measuring component.

[0015] In one embodiment, a charging connector is further provided on the meter body, the charging connector being electrically connected to the resistance measuring component, and the charging connector being used to charge the resistance measuring component.

[0016] In one embodiment, an operating switch disposed on the meter body is also included, the operating switch being used to control the power supply to the resistance measuring component.

[0017] In one embodiment, a grip handle is also included, which is connected to the body of the watch.

[0018] The aforementioned device for measuring the anti-corona layer resistance of stator bars, by setting two adjustable-pitch measuring electrodes on the meter body, allows the measuring operator to press the two measuring electrodes firmly against the surface of the stator bar using the meter body. This eliminates the need for the operator to hold each measuring electrode separately while pressing it against the stator bar, facilitating the measurement of the anti-corona layer resistance. Furthermore, it helps maintain reliable contact between the measuring electrodes and the anti-corona layer during measurement, reducing the risk of poor contact due to human error and improving measurement accuracy. In addition, the operator does not need to hold each measuring electrode separately for extended periods, reducing human fatigue, simplifying the measurement of the anti-corona layer resistance, and improving measurement efficiency. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the anti-corona layer resistance measuring device for stator bars in some embodiments of this application.

[0020] Figure 2 This is a structural diagram of the body, alignment member, and conductive sheet in some embodiments of this application.

[0021] Figure 3 This is a structural diagram of the measuring electrode in some embodiments of this application.

[0022] Figure 4 This is a structural diagram of the measuring electrode, alignment member, and locking member in some embodiments of this application.

[0023] In the diagram: 1. Measuring electrode; 11. First section; 111. Electrode terminal; 112. Telescopic sleeve; 1121. First sleeve; 1122. Second sleeve; 1113. Conductive elastomer; 12. Second section; 121. External thread; 13. Conductive terminal; 2. Body; 21. First adjustment hole; 22. Second adjustment hole; 23. Scale section; 24. First side; 25. Second side; 3. Alignment component; 4. Conductive sheet; 41. First conductive sheet; 42. Second conductive sheet; 5. Conductive wire; 6. Locking component; 7. Display screen; 8. Charging connector; 9. Operating switch; 10. Grip handle. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] See Figure 1 , Figure 1This diagram illustrates the structure of a stator bar anti-corona layer resistance measuring device according to some embodiments of this application. One embodiment of this application provides a stator bar anti-corona layer resistance measuring device (hereinafter referred to as the anti-corona layer resistance measuring device), which includes measuring electrodes 1 and measuring components. Two measuring electrodes 1 are provided, both of which are used to contact the anti-corona layer of the stator bar. The measuring components include a meter body 2, a resistance measuring component, and alignment members 3. At least a portion of the resistance measuring component is disposed in the meter body 2, and the resistance measuring component is electrically connected to the two measuring electrodes 1. Both measuring electrodes 1 are connected to the meter body 2, and at least one of the two measuring electrodes 1 is slidable relative to the meter body 2. Two alignment members 3 are provided, corresponding one-to-one on the measuring electrodes 1. The meter body 2 is provided with a scale portion 23, which is used to indicate the distance between the two measuring electrodes 1. The length direction of the scale portion 23 is parallel to the sliding direction of the measuring electrode 1. In this example, the length of the scale portion 23 is 100mm, meaning that the maximum distance between the two measuring electrodes 1 can be adjusted to 100mm, and the graduation value of the scale portion 23 is 1mm. Of course, in actual implementation, the length of the scale portion 23 can be flexibly adjusted as needed. For example, the length of the scale portion 23 can be adjusted to 50mm, 60mm, 70mm, 80mm, 90mm, 110mm, 120mm, 130mm, 140mm, 150mm, etc. No specific limitation is made on the length of the scale portion 23 here.

[0031] Two measuring electrodes 1 are connected to the meter body 2, and at least one of the two measuring electrodes 1 can slide relative to the meter body 2, making the distance between the two measuring electrodes 1 adjustable. This allows for flexible adjustment of the distance between the two measuring electrodes 1 according to measurement needs, meeting different measurement requirements and improving the applicability of the anti-corona layer resistance measuring device. Since alignment members 3 are correspondingly arranged on the measuring electrodes 1, and the meter body 2 has a scale section 23, when the measuring electrodes 1 slide relative to the meter body 2, the alignment members 3 on the measuring electrodes 1 move synchronously. Thus, the distance between the two measuring electrodes 1 can be determined through the correspondence between the alignment members 3 and the scale section 23, and the distance between the two measuring electrodes 1 can be indicated by the scale section 23, facilitating adjustment of the distance between the two measuring electrodes 1 according to measurement needs. The resistance measuring component has a resistance measuring circuit. During specific measurements, the distance between the two measuring electrodes 1 is adjusted according to the measurement needs, and the two measuring electrodes 1 are brought into contact with the anti-corona layer, so that the resistance measuring circuit in the resistance measuring component is electrically connected to the anti-corona layer, thereby allowing the resistance of the protective layer to be measured by the resistance measuring component.

[0032] This type of anti-corona layer resistance measuring device, by setting two adjustable-pitch measuring electrodes 1 on the meter body 2, allows the measuring operator to press the two measuring electrodes 1 firmly against the surface of the stator rod using the meter body 2. This eliminates the need for the operator to hold each measuring electrode 1 separately while pressing it against the stator rod, facilitating the measurement of the anti-corona layer resistance. Furthermore, it helps maintain reliable contact between the measuring electrodes 1 and the anti-corona layer on the stator rod during measurement, reducing the risk of poor contact due to human error and improving measurement accuracy. In addition, the operator does not need to hold each measuring electrode 1 separately for extended periods, reducing human fatigue, simplifying the measurement of the anti-corona layer resistance, and improving measurement efficiency.

[0033] In some embodiments of the anti-corona layer resistance measuring device, one measuring electrode 1 is fixed relative to the body 2, and the other measuring electrode 1 is slidable relative to the body 2. This design allows the distance between the two measuring electrodes 1 to be adjustable.

[0034] In other embodiments of the anti-corona layer resistance measuring device, two measuring electrodes 1 are slidably connected to the body 2. This design allows the distance between the two measuring electrodes 1 to be adjusted by sliding either measuring electrode 1 relative to the body 2, making it convenient to use.

[0035] Combination Figure 2 The watch body 2 has an internal cavity (not shown in the figure). The outer surface of the watch body 2 has a first side surface 24 and a second side surface 25. The first side surface 24 has a first adjustment hole 21, and the second side surface 25 has a second adjustment hole 22. Both the first adjustment hole 21 and the second adjustment hole 22 communicate with the cavity and the outside of the watch body 2, and the length directions of the first adjustment hole 21 and the second adjustment hole 22 are parallel. The scale portion 23 is located on the second side surface 25. Figure 3 and Figure 4The measuring electrode 1 includes a first segment 11 and a second segment 12 arranged at an angle to the first segment 11. In this example, the first side surface 24 and the second side surface 25 are arranged at a 90° angle. Correspondingly, the first segment 11 and the second segment 12 are arranged at a 90° angle, making the measuring electrode 1 L-shaped overall. This structure of the measuring electrode 1 is adapted to the angle between the first adjustment hole 21 and the second adjustment hole 22. Of course, in other examples, the angle between the first segment 11 and the second segment 12 can be flexibly adjusted as needed. Here, no specific limitation is made on the angle between the first segment 11 and the second segment 12. The first segment 11 is a conductor and is electrically connected to the resistance measuring component. One end of the first segment 11 and one end of the second segment 12 are both located in the cavity and connected to each other. The end of the first segment 11 away from the second segment 12 passes through the first adjustment hole 21 and protrudes from the first side surface 24 for contact with the anti-corona layer. The end of the second segment 12 away from the first segment 11 passes through the second adjustment hole 22 and protrudes from the second side surface 25. The alignment member 3 is located at the part of the second segment 12 that protrudes from the second side surface 25. The first adjustment hole 21 is provided on the first side surface 24 of the meter body 2 so that one end of the first segment 11 of the measuring electrode 1 can pass through the first adjustment hole 21 and protrude from the first side surface 24, facilitating contact between the first segment 11 and the anti-corona layer. The second adjustment hole 22 is provided on the second side surface 25 of the meter body 2 so that the second segment 12 of the measuring electrode 1 can pass through the second adjustment hole 22 and protrude from the second side surface 25, facilitating the installation of the alignment member 3 on the second segment 12. Since one end of the first segment 11 and one end of the second segment 12 are both located in the cavity and connected to each other, and the length directions of the first adjustment hole 21 and the second adjustment hole 22 are parallel, moving the first segment 11 or the second segment 12 along the length direction of the adjustment hole relative to the dial body 2 can move the measuring electrode 1 as a whole relative to the dial body 2, thereby facilitating the adjustment of the distance between the two measuring electrodes 1.

[0036] The measuring electrode 1 also includes a conductive terminal 13, which is disposed in the cavity and connected to the second segment 12. The second segment 12 provides support and fixation for the conductive terminal 13. In this example, there are two conductive terminals 13, which are connected one-to-one to the second segment 12 of the two measuring electrodes 1. The first segment 11 includes a conductive elastic element and an electrode terminal 111. The conductive terminal 13 is used to contact the resistance measuring component, ensuring that the conductive terminal 13 is electrically connected to the resistance measuring component. One end of the conductive elastic element is connected to the electrode terminal 111, and the other end is electrically connected to the conductive terminal 13. During specific measurement, the electrode terminal 111 contacts the anti-corona layer. In this example, the electrode terminal 111 is made of a carbon black-filled conductive rubber composite material. This conductive rubber has good conductivity and moderate hardness. When the electrode terminal 111 is pressed against the anti-corona layer of the stator bar, the electrode terminal 111 will not scratch the anti-corona layer of the stator bar, thereby avoiding damage to the anti-corona layer. Of course, in actual implementation, electrode terminals 111 can also be made of other conductive materials, and no specific restrictions are placed on the materials used to make electrode terminals 111. The conductive elastic element not only has conductive properties but also elastic expansion and contraction capabilities. Because the conductive elastic element is connected to electrode terminals 111, when electrode terminals 111 press against the anti-corona layer of the stator rods, the conductive elastic element undergoes elastic deformation under the force of electrode terminals 111. This elastic deformation allows for stable contact between electrode terminals 111 and the anti-corona layer, which helps prevent poor contact between electrode terminals 111 and the anti-corona layer.

[0037] In this example, the electrode terminal 111 has dimensions of 40mm × 40mm × 20mm, ensuring a sufficiently large contact area between the electrode terminal 111 and the anti-corona layer, thus guaranteeing measurement accuracy. In actual implementation, the dimensions of the electrode terminal 111 can be flexibly adjusted according to requirements; no specific limitations are imposed on the dimensions of the electrode terminal 111 here.

[0038] Combination Figure 1 , Figure 3 and Figure 4The conductive elastic element includes a telescopic sleeve 112 and a conductive elastomer 1113. The telescopic sleeve 112 is axially expandable and contracts, and is connected between the second segment 12 and the electrode terminal 111. At least a portion of the conductive elastomer 1113 is disposed inside the telescopic sleeve 112, and the conductive elastomer 1113 can elastically expand and contract within the telescopic sleeve 112. One end of the conductive elastomer is connected to the electrode terminal 111, and the other end is electrically connected to the conductive terminal 13. In this example, the conductive elastomer 1113 is a spring with good conductivity, so that the conductive elastomer 1113 has both conductivity and elastic expansion and contraction capabilities. Since the telescopic sleeve 112 is connected between the second section 12 and the electrode terminal 111, and the conductive elastomer 1113 can elastically expand and contract inside the telescopic sleeve 112, when the electrode terminal 111 presses against the anti-corona layer of the stator bar, the conductive elastomer 1113 is elastically compressed by the force of the electrode terminal 111. Through the elastic compression of the conductive elastomer 1113, the electrode terminal 111 can be stably contacted with the anti-corona layer. The telescopic sleeve 112 can extend and retract along its own axial direction. When the electrode terminal 111 presses against the anti-corona layer of the stator bar, the telescopic sleeve 112 also contracts synchronously with the conductive elastomer 1113. Therefore, the telescopic sleeve 112 will not cause positional interference to the electrode terminal 111. Since at least a portion of the conductive elastomer 1113 is disposed inside the telescopic sleeve 112, the telescopic sleeve 112 can limit and guide the conductive elastomer 1113, which helps to ensure that the conductive elastomer 1113 elastically extends and retracts along the axial direction of the telescopic sleeve 112 and prevents the conductive elastomer 1113 from deviating from its extension and retraction path. Since the electrode terminal 111 is connected to the telescopic sleeve 112, when the electrode terminal 111 is released from the anti-corona layer, the conductive elastomer 1113 automatically extends under its own elasticity and drives the electrode terminal 111 to move away from the conductive terminal 13. At the same time, the electrode terminal 111 moves and drives the telescopic sleeve 112 to extend, thereby causing the telescopic sleeve 112 to return to its original position.

[0039] To facilitate the assembly and disassembly of the measuring electrode 1, in this example, one end of the telescopic sleeve 112 is snapped into the second section 12, and the other end is snapped into the electrode terminal 111.

[0040] Of course, in actual implementation, the connection structure between the telescopic sleeve 112 and the second section 12 or the electrode terminal 111 can be flexibly adjusted as needed. For example, the telescopic sleeve 112 can be fixedly connected to the second section 12, or the telescopic sleeve 112 can be fixedly connected to the electrode terminal 111. No specific restrictions are placed on the connection structure between the telescopic sleeve 112 and the second section 12 or the electrode terminal 111.

[0041] In this example, the telescopic sleeve 112 includes a first sleeve 1121 and a second sleeve 1122. One of the first sleeve 1121 and the second sleeve 1122 is sleeved on the outer periphery of the other. The first sleeve 1121 is connected to the second segment 12, and the second sleeve 1122 is connected to the electrode terminal 111. The axis of the first sleeve 1121 coincides with the axis of the second sleeve 1122, and the first sleeve 1121 can slide relative to the second sleeve 1122 along its own axial direction, so that the length of the telescopic sleeve 112 is adjustable, thereby realizing that the telescopic sleeve 112 can extend and retract along its own axial direction. Specifically, the first sleeve 1121 is engaged with the second segment 12, and the second sleeve 1122 is engaged with the electrode terminal 111.

[0042] In another example, the telescopic sleeve 112 can also be configured as an elastic bellows, and the telescopic sleeve 112 with this structure can also extend and retract along its own axial direction. In this application, no specific restrictions are placed on the structure of the telescopic sleeve 112.

[0043] In this example, the end of the conductive elastomer 1113 away from the electrode terminal 111 is connected to the second segment 12, and the conductive terminal 13 is electrically connected to the conductive elastomer 1113 through the conductive wire 5.

[0044] Of course, in actual implementation, the end of the conductive elastomer 1113 away from the electrode terminal 111 can also be arranged to pass through the second section 12 and connect to the conductive terminal 13. In this way, the conductive elastomer 1113 and the conductive terminal 13 can also be electrically connected.

[0045] The resistance measuring component includes a resistance measuring circuit (not shown in the figure) and a conductive plate 4, both disposed inside the meter body 2. At least a portion of the conductive plate 4 is disposed within the cavity for contact with the conductive terminal 13. The resistance measuring circuit is connected to the conductive plate 4. It should be noted that the resistance measuring circuit is prior art, and its structure will not be described in detail here. The conductive plate 4 is disposed at least partially within the cavity, allowing the resistance measuring circuit to contact the conductive terminal 13 via the conductive plate 4, thereby achieving electrical connection between the resistance measuring circuit and the conductive terminal 13.

[0046] In one example, combined Figure 2The conductive sheet 4 includes a first conductive sheet 41 and a second conductive sheet 42 connected to the first conductive sheet 41. The first conductive sheet 41 and the second conductive sheet 42 form an angle. In this example, the first conductive sheet 41 and the second conductive sheet 42 are set at 90°. The end of the first conductive sheet 41 away from the second conductive sheet 42 is connected to the resistance measurement circuit. The second conductive sheet 42 is parallel to the length direction of the second adjustment hole 22. The second conductive sheet 42 is slidably connected to the conductive terminal 13. Since the conductive terminal 13 is connected to the second segment 12 of the measuring electrode 1, when adjusting the distance between the two measuring electrodes 1, the conductive terminal 13 moves synchronously with the measuring electrode 1. By setting the second conductive sheet 42 to be slidably connected to the conductive terminal 13, the conductive sheet 4 will not cause positional interference to the conductive terminal 13 during the synchronous movement of the conductive terminal 13 along the measuring electrode 1, and the conductive sheet 4 can always maintain contact with the conductive terminal 13, avoiding separation of the conductive sheet 4 and the conductive terminal 13 due to the adjustment of the position of the measuring electrode 1.

[0047] In another example, the conductive sheet 4 can also be configured as a flexible or elastically expandable component, with one end of the conductive sheet 4 furthest from the resistance measurement circuit fixedly connected to the conductive terminal 13. Specifically, when the conductive sheet 4 is a flexible component, its length is relatively long. When the distance between the two measuring electrodes 1 is short, part of the conductive sheet 4 is bent and accommodated in the cavity. As the distance between the two measuring electrodes 1 is increased, the bent conductive sheet 4 is gradually straightened by the measuring electrodes 1, thus allowing the conductive sheet 4 to adapt to the distance between the conductive terminal 13 and the resistance measurement circuit, thereby ensuring that the conductive sheet 4 always remains in contact with the conductive terminal 13. When the conductive sheet 4 is an elastically expandable component, when the distance between the two measuring electrodes 1 is short, the conductive sheet 4 is in its original or contracted state. As the distance between the two measuring electrodes 1 is increased, the conductive sheet 4 is stretched, thus being in a stretched state, allowing the conductive sheet 4 to adapt to the distance between the conductive terminal 13 and the resistance measurement circuit, thereby ensuring that the conductive sheet 4 always remains in contact with the conductive terminal 13.

[0048] In some embodiments, the anti-corona layer resistance measuring device also includes a locking member 6. The locking member 6 is disposed on the side of the alignment member 3 facing away from the second side 25. The locking member 6 is sleeved on the second section 12 and threadedly connected to the second section 12. In this example, the locking member 6 is a locking nut. The portion of the second section 12 protruding from the second side 25 is provided with an external thread 121. The locking nut engages with the external thread 121 on the second section 12. After adjusting the distance between the two measuring electrodes 1, the locking member 6 is tightened toward the second side 25, so that the alignment member 3 is pressed between the locking member 6 and the second side 25. Under the action of the second locking member 6, the alignment member 3 is locked onto the second side 25 and the second section 12 is locked in the second adjustment hole 22. This keeps the distance between the two measuring electrodes 1 constant, thereby ensuring that the measurement distance is the same in each resistance measurement. When it is necessary to adjust the position of the measuring electrodes 1, the locking member 6 is loosened away from the second side 25.

[0049] It should be noted that when both measuring electrodes 1 are slidably connected to the watch body 2, two locking members 6 are provided, and the locking members 6 are respectively provided on the second section 12 of the measuring electrode 1; when one measuring electrode 1 is fixed relative to the watch body 2 and the other measuring electrode 1 can slide relative to the watch body 2, one locking member 6 is provided, and the locking member 6 is provided on the second section 12 of the measuring electrode 1 that can slide relative to the watch body 2.

[0050] It is understood that in some embodiments, an elastic layer may be provided on the inner wall of the first adjustment hole 21 or the second adjustment hole 22 in the width direction. The elastic layer has the ability to elastically deform and abuts against the measuring electrode 1. Specifically, when the elastic layer is provided on the inner wall of the first adjustment hole 21 in the width direction, the elastic layer abuts against the first segment 11 of the measuring electrode 1; when the elastic layer is provided on the inner wall of the second adjustment hole 22 in the width direction, the elastic layer abuts against the second segment 12 of the measuring electrode 1. When it is necessary to adjust the distance between the two measuring electrodes 1, after the external force pushes the measuring electrode 1 and overcomes the abutting force of the elastic layer, the measuring electrode 1 can be pushed along the length direction of the first adjustment hole 21 or the second adjustment hole 22. When the external force is removed, the elastic layer automatically prevents the measuring electrode 1 from moving along the length direction of the first adjustment hole 21 or the second adjustment hole 22, thereby keeping the distance between the two measuring electrodes 1 unchanged. Therefore, for this type of anti-corona layer resistance measuring device, the locking member 6 may not be provided.

[0051] In some embodiments, the anti-corona layer resistance measuring device also includes a display screen 7 disposed on the body 2. The display screen 7 is electrically connected to the resistance measuring component. Specifically, the display screen 7 is electrically connected to the resistance measuring circuit of the resistance measuring component. The display screen 7 is used to display the output result of the resistance measuring component. With this design, the measuring personnel can directly read the output result of the resistance measuring component on the display screen 7, which improves the convenience of measurement.

[0052] The anti-corona layer resistance measuring device also includes a charging connector 8 disposed on the meter body 2. The charging connector 8 is electrically connected to the resistance measuring component and is used to charge the resistance measuring component. It is understood that the resistance measuring component has a power source, and the charging connector 8 is electrically connected to the power source. The power source supplies power to the resistance measuring circuit. By providing the charging connector 8 on the meter body 2, the power source in the resistance measuring component can be quickly charged. In this example, the charging connector 8 has a charging interface, which is a USB Type-C interface.

[0053] Furthermore, the anti-corona layer resistance measuring device also includes an operation switch 9 disposed on the meter body 2. The operation switch 9 is used to control the power supply to the resistance measuring component. In this example, the operation switch 9 is a switch button, which controls the power supply to the resistance measuring component. When it is necessary to measure the resistance of the anti-corona layer, the power supply to the resistance measuring component is turned on by the operation switch 9; when it is not necessary to measure the resistance of the anti-corona layer, the power supply to the resistance measuring component is turned off by the operation switch 9.

[0054] To facilitate gripping the anti-corona layer resistance measuring device, some embodiments of the device further include a grip handle 10, which is connected to the meter body 2. In this example, the grip handle 10 is located on the side of the meter body 2 facing away from the first side 24. The grip handle 10 is an insulator, specifically made of insulating rubber. The grip handle 10 provides a gripping point for the operator when measuring the anti-corona layer resistance, facilitating the measurement operation. To improve operator comfort, the grip handle 10 is equipped with an anti-slip structure, such as protective stripes, to prevent slippage during gripping.

[0055] The following details the usage of the anti-corona layer resistance measuring device:

[0056] First, adjust the distance between the two measuring electrodes 1 according to the measurement requirements, so that the distance between the alignment pieces 3 on the two measuring electrodes 1 is equal to the distance required for measurement. Then, tighten the locking piece 6 toward the second side 25 of the meter body 2 to fix the position of the two measuring electrodes 1. Then, press the operation switch 9 to start the resistance measurement component. Then, hold the handle 10 to make the electrode terminal 111 contact the anti-corona layer on the surface of the stator bar, and apply a pushing force to press the electrode terminal 111 against the stator bar to measure the resistance of the anti-corona layer. The display screen 7 will automatically display the resistance value of the anti-corona layer between the two measuring electrodes 1. Keep the distance between the two measuring electrodes 1 unchanged and continue to measure the resistance value of the anti-corona layer at other positions on the stator bar until the measurement of the anti-corona layer resistance at all target measurement positions on the stator bar (e.g., the wide and narrow sides of the stator plate) is completed.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A device for measuring the resistance of the anti-corona layer of stator bars, characterized in that, include: The measuring electrodes are provided in two forms, both of which are used to contact the anti-dizziness layer. and A measuring assembly includes a meter body, a resistance measuring component, and alignment members. At least a portion of the resistance measuring component is disposed in the meter body and is electrically connected to two measuring electrodes. Both measuring electrodes are connected to the meter body, and at least one of the measuring electrodes is slidable relative to the meter body to adjust the distance between the two measuring electrodes. Two alignment members are provided, each corresponding to one of the measuring electrodes. The meter body is provided with a scale portion for indicating the distance between the two measuring electrodes.

2. The anti-corona layer resistance measuring device for stator bars according to claim 1, characterized in that, The watch body has an internal cavity, and its outer surface has a first side and a second side. The first side has a first adjustment hole, and the second side has a second adjustment hole. Both the first and second adjustment holes are connected to the cavity and the outside of the watch body, and their length directions are parallel. The scale portion is disposed on the second side. The measuring electrode includes a first segment and a second segment disposed at an angle to the first segment. The first segment is a conductor and is electrically connected to the resistance measuring component. One end of the first segment and one end of the second segment are disposed in the cavity and connected to each other. The end of the first segment away from the second segment passes through the first adjustment hole and protrudes from the first side for contact with the anti-corona layer. The end of the second segment away from the first segment passes through the second adjustment hole and protrudes from the second side. The alignment member is disposed at the part of the second segment that protrudes from the second side.

3. The anti-corona layer resistance measuring device for stator bars according to claim 2, characterized in that, The measuring electrode further includes a conductive terminal, which is disposed in the cavity and connected to the second segment. The conductive terminal is used to contact the resistance measuring component. The first segment includes a conductive elastic element and an electrode terminal. One end of the conductive elastic element is connected to the electrode terminal, and the other end is electrically connected to the conductive terminal.

4. The anti-corona layer resistance measuring device for stator bars according to claim 3, characterized in that, The conductive elastic element includes a telescopic sleeve and a conductive elastomer. The telescopic sleeve can extend and retract along its own axial direction. The telescopic sleeve is connected between the second section and the electrode terminal. At least a portion of the conductive elastomer is disposed inside the telescopic sleeve, and the conductive elastomer can elastically extend and retract inside the telescopic sleeve. One end of the conductive elastomer is connected to the electrode terminal, and the other end is electrically connected to the conductive terminal.

5. The anti-corona layer resistance measuring device for stator bars according to claim 3, characterized in that, The resistance measuring component includes a conductive sheet and a resistance measuring circuit both disposed inside the body of the meter. At least a portion of the conductive sheet is disposed in the cavity for contact with the conductive terminal, and the resistance measuring circuit is connected to the conductive sheet.

6. The anti-corona layer resistance measuring device for stator bars according to claim 2, characterized in that, It also includes a locking element, which is disposed on the side of the alignment member facing away from the second side, and is sleeved on the second segment and threadedly connected to the second segment.

7. The anti-corona layer resistance measuring device for stator bars according to any one of claims 1 to 5, characterized in that, It also includes a display screen disposed on the meter body, the display screen being electrically connected to the resistance measuring component, the display screen being used to display the output result of the resistance measuring component.

8. The anti-corona layer resistance measuring device for stator bars according to any one of claims 1 to 5, characterized in that, It also includes a charging connector disposed on the meter body, the charging connector being electrically connected to the resistance measuring component, and the charging connector being used to charge the resistance measuring component.

9. The anti-corona layer resistance measuring device for stator bars according to any one of claims 1 to 5, characterized in that, It also includes an operation switch disposed on the meter body, the operation switch being used to control the power supply to the resistance measuring component.

10. The anti-corona layer resistance measuring device for stator bars according to any one of claims 1 to 5, characterized in that, It also includes a grip handle, which is connected to the watch body.

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