Generator rotor brush current measuring tool

Abstract

The utility model provides a generator rotor brush current measuring tool which comprises a cylinder, the side wall of the upper end of the cylinder is provided with a second sliding groove, the side wall of the lower end of the cylinder is provided with a first sliding groove, and the inner wall of the cylinder is slidably connected with a first circular plate and a second circular plate respectively. According to the generator rotor brush current measuring tool provided by the utility model, the protruding block is pressed downwards by a finger, so that the second circular plate drives the first circular plate to move downwards through the circular rod, the first circular plate drives the guide wheel on the mounting rack to move downwards through the sliding block, the guide wheel extrudes the trigger in the downward moving process, and the trigger is driven to move downwards through the sliding block. Compared with the mode that a pull rope is used for straight pulling, a round rod is used for replacing the pull rope, so that the risk of breakage of the pull rope is reduced, use is better and longer, and the labor intensity of workers when the detection device is used is reduced through simple pressing operation.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment detection devices, in particular to a generator rotor brush current measuring tool. Background Art

[0002] The generator excitation system includes the generator collector ring and brushes. The brushes are sliding contacts used on the collector rings to import and export current. The excitation DC is transmitted to the rotor excitation current through the brushes and the contact between the positive and negative collector rings. During the long-term use of the unit, the brushes need to be replaced to ensure the safe operation of the unit. In addition, DL / T817 "Technical Regulations for Maintenance of Vertical Hydro-Turbine Generators" stipulates that the new brushes should be polished so that the contact surface between the brushes and the commutator segments reaches more than three quarters; when checking whether the brush contact surface is qualified, the operating current of each brush is usually measured, and the measured current data is analyzed and demonstrated, and the brushes are adjusted and processed in time to eliminate faults in time.

[0003] The existing Chinese patent publication number is CN216927023U, which is a generator rotor brush performance detection tool. It includes an insulating tube and a handle and an ammeter fixedly connected to the two ends of the insulating tube respectively. The trigger on the ammeter for controlling the opening of the clamp head at the end of the ammeter is located on the side wall of the ammeter close to the insulating tube. The two ends of the insulating tube are respectively slidably provided with a sliding member and a handle. The sliding member and the handle are fixedly connected by an insulated pull rope. The handle is close to the handle, and one end of the sliding member is rotatably provided with a pressure wheel for moving with the sliding member and pressing the trigger down.

[0004] Another problem with the above device is that the pull rope is at risk of breaking during long-term use, which may lead to errors during the detection process and affect the detection operation.

[0005] Therefore, it is necessary to provide a generator rotor brush current measurement tool to solve the above technical problems. Utility Model Content

[0006] The utility model provides a generator rotor brush current measuring tool, which solves the problem of the breakage of the pull rope in long-term use.

[0007] To solve the above technical problems, the generator rotor brush current measuring tool provided by the utility model includes: a cylinder, a second chute is opened on the side wall of the upper end of the cylinder, a first chute is opened on the side wall of the lower end of the cylinder, a first circular plate and a second circular plate are respectively slidably connected to the inner wall of the cylinder, a circular rod is installed between the first circular plate and the second circular plate, a telescopic rod and a spring are respectively installed between the second circular plate and the inner bottom of the cylinder, the spring is sleeved outside the telescopic rod, a convex block is installed on the side wall of the second circular plate, the convex block penetrates through the first chute and is slidably connected with the first chute, a slider is installed on the side wall of the first circular plate, the slider is slidably connected with the second chute, an installation frame is installed at the outer end of the slider located outside the cylinder, a guide wheel is rotatably connected to the inside of the installation frame, a sliding sleeve is slidably connected to the outer wall of the cylinder, a connecting block is installed on the outer wall of the sliding sleeve, an ammeter is installed on the outer wall of the connecting block through a limiting component, a trigger is installed on the side wall of the ammeter close to the guide wheel, and a clamp head is installed on the top of the ammeter.

[0008] Preferably, the limiting component includes a limiting groove, a limiting block, a baffle plate, a rotating shaft and a stop block, the limiting groove is opened on the top of the connecting block, the limiting block is inserted and connected with the limiting groove, and the ammeter is fixedly connected to the outer wall of the limiting block.

[0009] Preferably, the rotating shaft is fixedly connected to the top of the connecting block, the baffle plate is rotatably connected to the rotating shaft, and the bottom of the baffle plate is in close contact with the top of the limiting block.

[0010] Preferably, the stop block is installed on the top of the connecting block, and a torsion spring is installed between the rotating shaft and the baffle plate.

[0011] Preferably, a second rectangular block is installed on the outer wall of the sliding sleeve, a first rectangular block is installed on the outer wall of the lower end of the cylinder, and a threaded rod is rotatably connected to the first rectangular block.

[0012] Preferably, the threaded rod is in threaded connection with the second rectangular block, a wheel disc is rotatably connected to the top of the first rectangular block, and the wheel disc is fixedly connected to the threaded rod.

[0013] Compared with the related art, the generator rotor brush current measuring tool provided by the utility model has the following beneficial effects:

[0014] The utility model provides a generator rotor brush current measuring tool. Hold the lower end of the cylinder, move the ammeter to the area to be detected, then press the convex block downward with a finger, so that the second circular plate drives the first circular plate to move downward through the circular rod. The first circular plate drives the guide wheel on the installation frame to move downward through the slider. During the downward movement of the guide wheel, the trigger will be squeezed, thereby controlling the opening of the clamp head on the ammeter to detect the performance of the generator rotor brush. Compared with the form of directly pulling with a pull rope, using a circular rod instead of a pull rope reduces the risk of the pull rope breaking, and can be used better and longer. By simple pressing operation, the labor intensity of the staff when using the detection device is reduced. Brief Description of the Drawings

[0015] Figure 1 Figure 1 is a schematic structural diagram of a preferred embodiment of the generator rotor brush current measurement tool provided by the present utility model;

[0016] Figure 2 is Figure 1 a schematic structural diagram of the threaded rod structure shown in Figure 2;

[0017] Figure 3 is Figure 1 a schematic structural diagram of the internal structure of the cylinder shown in Figure 3;

[0018] Figure 4 is Figure 1 an enlarged schematic diagram of part A shown in Figure 4;

[0019] Figure 5 is Figure 3 an enlarged schematic diagram of part B shown in Figure 5.

[0020] Reference Numerals in the Drawings:

[0021] 1. Cylinder, 2. Slide Sleeve, 3. Ammeter, 4. Clamp Head, 5. Trigger, 6. Mounting Bracket, 7. Guide Wheel, 8. First Slide Groove, 9. Protrusion, 10. First Rectangular Block, 11. Disk, 12. Threaded Rod, 13. Second Rectangular Block, 14. Connecting Block, 15. Limiting Assembly, 151. Limiting Groove, 152. Limiting Block, 153. Baffle, 154. Rotating Shaft, 155. Stopper, 16. Round Rod, 17. First Round Plate, 18. Second Round Plate, 19. Spring, 20. Telescopic Rod, 21. Second Slide Groove, 22. Slide Block. Detailed Embodiment

[0022] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , where Figure 1 Figure 1 is a schematic structural diagram of a preferred embodiment of the generator rotor brush current measurement tool provided by the present utility model; Figure 2 is Figure 1 a schematic structural diagram of the threaded rod structure shown in Figure 2; Figure 3 is Figure 1 a schematic structural diagram of the internal structure of the cylinder shown in Figure 3; Figure 4 is Figure 1 an enlarged schematic diagram of part A shown in Figure 4; Figure 5 is Figure 3Schematic enlarged view of part B shown. The generator rotor brush current measurement tool includes: a cylinder 1, a second chute 21 is provided on the side wall of the upper end of the cylinder 1, a first chute 8 is provided on the side wall of the lower end of the cylinder 1, a first circular plate 17 and a second circular plate 18 are respectively slidably connected to the inner wall of the cylinder 1, a circular rod 16 is installed between the first circular plate 17 and the second circular plate 18, a telescopic rod 20 and a spring 19 are respectively installed between the second circular plate 18 and the inner bottom of the cylinder 1, the spring 19 is sleeved outside the telescopic rod 20, a convex block 9 is installed on the side wall of the second circular plate 18, the convex block 9 penetrates through the first chute 8 and is slidably connected with the first chute 8, a slider 22 is installed on the side wall of the first circular plate 17, the slider 22 is slidably connected with the second chute 21, an installation bracket 6 is installed at the outer end of the cylinder 1 where the slider 22 is located, a guide wheel 7 is rotatably connected inside the installation bracket 6, a sliding sleeve 2 is slidably connected to the outer wall of the cylinder 1, a connecting block 14 is installed on the outer wall of the sliding sleeve 2, an ammeter 3 is installed on the outer wall of the connecting block 14 through a limiting component 15, a trigger 5 is installed on the side wall of the ammeter 3 close to the guide wheel 7, a clamping head 4 is installed on the top of the ammeter 3, and pressing the trigger 5 can control the opening of the clamping head 4.

[0024] The limiting component 15 includes a limiting groove 151, a limiting block 152, a baffle 153, a rotating shaft 154 and a stop block 155. The limiting groove 151 is opened on the top of the connecting block 14, the limiting block 152 is inserted and connected with the limiting groove 151, and the ammeter 3 is fixedly connected with the outer wall of the limiting block 152.

[0025] The rotating shaft 154 is fixedly connected to the top of the connecting block 14, the baffle 153 is rotatably connected to the rotating shaft 154, the bottom of the baffle 153 is in close contact with the top of the limiting block 152. After rotating the baffle 153 to make it leave the entrance end of the limiting groove 151, the limiting block 152 installed with the ammeter 3 can be pulled out of the limiting groove 151.

[0026] The stop block 155 is installed on the top of the connecting block 14, a torsion spring is installed between the rotating shaft 154 and the baffle 153. The setting of the torsion spring facilitates the automatic reset of the rotated baffle 153, and the setting of the stop block 155 is to limit the offset of the stop block 155 under the action of the torsion spring.

[0027] A second rectangular block 13 is installed on the outer wall of the sliding sleeve 2, a first rectangular block 10 is installed on the outer wall of the lower end of the cylinder 1, and a threaded rod 12 is rotatably connected to the first rectangular block 10.

[0028] The threaded rod 12 is threadedly connected with the second rectangular block 13, a wheel disc 11 is rotatably connected to the top of the first rectangular block 10, and the wheel disc 11 is fixedly connected with the threaded rod 12. Rotating the wheel disc 11 makes the threaded rod 12 rotate, thereby driving the ammeter 3 to move up and down through components such as the second rectangular block 13 and the sliding sleeve 2.

[0029] The working principle of the generator rotor brush current measuring tool provided by the present utility model is as follows: Hold the lower end of the cylinder 1. After moving the ammeter 3 to the area to be detected, press the convex block 9 downward with a finger, so that the second circular plate 18 drives the first circular plate 17 to move downward through the round rod 16. The first circular plate 17 drives the guide wheel 7 on the mounting bracket 6 to move downward through the slider 22. During the downward movement of the guide wheel 7, it will squeeze the trigger 5, thereby controlling the opening of the clamp head 4 on the ammeter 3 to detect the performance of the generator rotor brush.

[0030] Compared with the related art, the generator rotor brush current measuring tool provided by the present utility model has the following beneficial effects:

[0031] Hold the lower end of the cylinder 1. After moving the ammeter 3 to the area to be detected, press the convex block 9 downward with a finger, so that the second circular plate 18 drives the first circular plate 17 to move downward through the round rod 16. The first circular plate 17 drives the guide wheel 7 on the mounting bracket 6 to move downward through the slider 22. During the downward movement of the guide wheel 7, it will squeeze the trigger 5, thereby controlling the opening of the clamp head 4 on the ammeter 3 to detect the performance of the generator rotor brush. Compared with the form of directly pulling with a pull rope, replacing the pull rope with the round rod 16 reduces the risk of the pull rope breaking, and it can be used better and longer. By simple pressing operation, the labor intensity of the staff when using the detection device is reduced.

[0032] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A measuring tool for the brush current of a generator rotor, characterized in that It includes: a cylinder. A second chute is provided on the side wall of the upper end of the cylinder, and a first chute is provided on the side wall of the lower end of the cylinder. A first circular plate and a second circular plate are respectively slidably connected to the inner wall of the cylinder. A circular rod is installed between the first circular plate and the second circular plate. An expansion rod and a spring are respectively installed between the second circular plate and the inner bottom of the cylinder. The spring is sleeved outside the expansion rod. A convex block is installed on the side wall of the second circular plate. The convex block penetrates through the first chute and is slidably connected to the first chute. A slider is installed on the side wall of the first circular plate. The slider is slidably connected to the second chute. An installation frame is installed at the outer end of the slider located outside the cylinder. A guide wheel is rotatably connected inside the installation frame. A sliding sleeve is slidably connected to the outer wall of the cylinder. A connecting block is installed on the outer wall of the sliding sleeve. An ammeter is installed on the outer wall of the connecting block through a limiting component. A trigger is installed on the side wall of the ammeter close to the guide wheel. A clamp head is installed on the top of the ammeter.

2. The generator rotor brush current measuring tool according to claim 1, wherein The limiting component includes a limiting groove, a limiting block, a baffle plate, a rotating shaft and a stop block. The limiting groove is provided on the top of the connecting block. The limiting block is inserted and connected to the limiting groove. The ammeter is fixedly connected to the outer wall of the limiting block.

3. The generator rotor brush current measuring tool according to claim 2, wherein The rotating shaft is fixedly connected to the top of the connecting block. The baffle plate is rotatably connected to the rotating shaft. The bottom of the baffle plate is in close contact with the top of the limiting block.

4. The generator rotor brush current measuring tool according to claim 3, characterized in that, The stop block is installed on the top of the connecting block. A torsion spring is installed between the rotating shaft and the baffle plate.

5. The generator rotor brush current measuring tool according to claim 1, characterized in that, A second rectangular block is installed on the outer wall of the sliding sleeve. A first rectangular block is installed on the outer wall of the lower end of the cylinder. A threaded rod is rotatably connected to the first rectangular block.

6. The generator rotor brush current measurement tool according to claim 5, characterized in that The threaded rod is threadedly connected to the second rectangular block. A wheel disc is rotatably connected to the top of the first rectangular block. The wheel disc is fixedly connected to the threaded rod.

Images