Shaft voltage detection device

Abstract

The utility model relates to the technical field of shaft voltage detection, in particular to a shaft voltage detection device, which comprises a first shell, a second shell, a first connecting pipe, a second connecting pipe and a voltage detection unit, is reasonable in structure and convenient to use, is provided with a handle, is convenient for a worker to grasp, and is convenient to operate. When the shaft voltage detection device is used, the worker grabs the handle to lift the shaft voltage detection device, and the end part of the test rod abuts against the end part of the motor shaft, so that the shaft voltage detection device is convenient to use. At the moment, the motor shaft, the test rod, the first conduction rod, the conduction seat, the voltage detection unit and the grounding module form a loop and are conducted, so that the voltage detection unit can detect the voltage of the motor shaft, and a single worker can independently complete shaft voltage detection work; the problems that at least two persons are needed during the existing shaft voltage test and the workers are easy to touch the high-speed rotating motor shaft by mistake can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft voltage detection and is a shaft voltage detection device. Background Art

[0002] During the operation of a generator, voltage is likely to be generated on the generator shaft. When the voltage is sufficient to break down the oil film between the shaft and the bearing, a discharge phenomenon will occur, resulting in the burning of the bearing bush, forced shutdown, and accidents. Therefore, synchronous motors such as steam turbines, hydro-generators, synchronous condensers in conventional power plants, and generators in pumped storage power stations need to carry out shaft voltage tests during the unit's overall startup commissioning stage or after the unit's major overhaul.

[0003] Currently, at least two people are required for shaft voltage testing. One person uses a test conductor to contact the motor shaft, and the other person uses a multimeter to measure the voltage of the test conductor to the ground. Due to the narrow space inside the machine cover, it is inconvenient to operate when multiple people enter at the same time, and the staff is prone to accidentally touch the high-speed rotating motor shaft, creating a safety hazard. Summary of the Invention

[0004] The utility model provides a shaft voltage detection device, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems that at least two people are required for existing shaft voltage testing and the staff is prone to accidentally touch the high-speed rotating motor shaft.

[0005] The technical solution of the utility model is realized by the following measures: A shaft voltage detection device includes a first housing, a second housing, a first connecting pipe, a second connecting pipe, and a voltage detection unit. A first screw hole penetrating up and down is provided in the center of the lower end of the first housing. A first conducting rod is screwed into the first screw hole. The upper end of the first conducting rod is fixedly connected with a test rod, and the upper end of the test rod passes through the upper end of the first housing and is located above the first housing. A second housing is provided below the first housing. The upper end of the second housing is fixedly communicated with a first connecting pipe. The inner side of the upper end of the first connecting pipe is fixedly installed with a first mounting plate. A second screw hole penetrating up and down is provided in the upper end of the first mounting plate corresponding to the position of the first screw hole. A conducting seat is fixedly installed at the lower end of the first mounting plate. A first thread groove is provided in the upper end of the conducting seat corresponding to the position of the second screw hole. A connecting mechanism for increasing the distance between the first housing and the second housing is fixedly communicated between the first housing and the first connecting pipe. A voltage detection unit is provided inside the second housing. The lower end of the second housing is fixedly communicated with a second connecting pipe. The lower end of the second connecting pipe is fixedly communicated with a cylindrical handle. A grounding module is provided at the lower end of the handle. The voltage detection unit is respectively connected with the grounding module and the conducting seat, and the conducting seat is connected with the first conducting rod.

[0006] The following is a further optimization and / or improvement of the above technical solution of the utility model:

[0007] The above-mentioned connecting mechanism may include a third connecting pipe, a second mounting plate, and a third mounting plate. A third connecting pipe is fixedly connected and communicated between the first housing and the first connecting pipe. A second mounting plate is fixedly installed inside the upper end of the third connecting pipe. A third screw hole penetrating up and down is opened at the upper end of the second mounting plate corresponding to the position of the first screw hole. A third mounting plate is fixedly installed inside the lower end of the third connecting pipe. A fourth screw hole penetrating up and down is opened at the lower end of the third mounting plate corresponding to the position of the second screw hole. A connecting rod is fixedly connected between the second mounting plate and the third mounting plate. A second thread groove is opened at the upper end of the connecting rod corresponding to the position of the third screw hole. The lower end of the first conduction rod passes through the lower end of the third screw hole and is screwed into the second thread groove. The lower end of the connecting rod is fixedly connected with a second conduction rod. The lower end of the second conduction rod passes through the lower end of the fourth screw hole and is screwed into the first thread groove.

[0008] The above-mentioned grounding module may include a grounding port and a grounding clip. A grounding hole penetrating up and down is opened at the lower end of the handle. A grounding port is installed inside the grounding hole. The voltage detection unit is connected to the grounding port, and the grounding port is connected to the grounding clip.

[0009] A through hole penetrating front and back may be opened at the front side of the upper part of the above-mentioned handle. A switch module is installed inside the installation hole, and the switch module is connected to the voltage detection unit.

[0010] The above-mentioned voltage detection unit may include a measurement module and a storage module, and the measurement module is connected to the storage module.

[0011] A brush braid may be fixedly installed at the upper end of the above-mentioned test rod.

[0012] The structure of the utility model is reasonable and compact, and it is convenient to use. It is provided with a handle, which is convenient for the staff to grip, and enables the staff to perform detection work at a safe distance, preventing the staff from accidentally touching the motor shaft. When in use, the staff grips the handle and lifts the shaft voltage detection device, and presses the end of the test rod against the end of the motor shaft. At this time, the motor shaft, the test rod, the first conduction rod, the conduction seat, the voltage detection unit, and the grounding module form a loop and conduct, so that the voltage detection unit can detect the voltage of the motor shaft, and can realize that a single staff member can complete the shaft voltage detection work alone, and can effectively solve the problem that at least two people are required for the existing shaft voltage test and the staff is prone to accidentally touch the high-speed rotating motor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 is the front view structural schematic diagram of Embodiment 1.

[0014] Attached Figure 2 is the front view sectional structural schematic diagram of Embodiment 1.

[0015] Attached Figure 3 is the circuit structural schematic diagram of Embodiment 1.

[0016] The codes in the attached drawings are as follows: 1 is the first housing, 2 is the second housing, 3 is the first connecting pipe, 4 is the second connecting pipe, 5 is the third connecting pipe, 6 is the first mounting plate, 7 is the second mounting plate, 8 is the third mounting plate, 9 is the first conduction rod, 10 is the second conduction rod, 11 is the measurement module, 12 is the switch module, 13 is the grounding port, 14 is the grounding clip, 15 is the handle, 16 is the test rod, 17 is the brush pigtail, 18 is the connecting rod, and 19 is the conduction seat. Detailed implementation manners

[0017] The present utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solution of the present utility model and the actual situation.

[0018] In the present utility model, for the convenience of description, the description of the relative position relationship of each component is carried out according to the layout mode of the attached drawings of the specification. For example, the position relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the attached drawings of the specification. Figure 1 The position relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the attached drawings of the specification.

[0019] The present utility model will be further described below in conjunction with the embodiments and the attached drawings:

[0020] Embodiment 1. As shown in FIGS. Figure 1 、 2 3, the shaft voltage detection device includes a first housing 1, a second housing 2, a first connecting pipe 3, a second connecting pipe 4, and a voltage detection unit. A first screw hole penetrating up and down is opened in the center of the lower end of the first housing 1. A first conduction rod 9 is screwed in the first screw hole. The upper end of the first conduction rod 9 is fixedly connected to a test rod 16. The upper end of the test rod 16 penetrates through the upper end of the first housing 1 and is located above the first housing 1. A second housing 2 is provided below the first housing 1. The upper end of the second housing 2 is fixedly communicated with a first connecting pipe 3. The inner side of the upper end of the first connecting pipe 3 is fixedly provided with a first mounting plate 6. A second screw hole penetrating up and down is opened at the upper end of the first mounting plate 6 corresponding to the position of the first screw hole. A conduction seat 19 is fixedly installed at the lower end of the first mounting plate 6. A first thread groove is opened at the upper end of the conduction seat 19 corresponding to the position of the second screw hole. A connecting mechanism for increasing the distance between the first housing 1 and the second housing 2 is fixedly communicated between the first housing 1 and the first connecting pipe 3. A voltage detection unit is provided in the second housing 2. The lower end of the second housing 2 is fixedly communicated with a second connecting pipe 4. The lower end of the second connecting pipe 4 is fixedly communicated with a handle 15 in a cylindrical shape. A grounding module is provided at the lower end of the handle 15. The voltage detection unit is respectively connected to the grounding module and the conduction seat 19. The conduction seat 19 is connected to the first conduction rod 9.

[0021] The first housing 1, the second housing 2, the first connecting pipe 3, the second connecting pipe 4, and the handle 15 are all made of insulating materials. The test rod 16, the first conduction rod 9, and the second conduction rod 10 are all made of metal conductive materials. In this embodiment, the handle 15 is provided to facilitate the staff to grip and enable the staff to perform detection work at a safe distance, preventing the staff from accidentally touching the motor shaft. When in use, the staff grips the handle 15 and lifts the shaft voltage detection device, and presses the end of the test rod 16 against the end of the motor shaft. At this time, the motor shaft, the test rod 16, the first conduction rod 9, the conduction seat 19, the voltage detection unit, and the grounding module form a loop and conduct, so that the voltage detection unit can detect the shaft voltage of the motor, and a single staff can complete the shaft voltage detection work alone, effectively solving the problem that at least two people are required for the existing shaft voltage test and the staff is prone to accidentally touch the high-speed rotating motor shaft.

[0022] According to actual needs, the above shaft voltage detection device can be further optimized and / or improved as follows:

[0023] Embodiment 2, as shown in the appendix Figure 1 , 2 As shown, this embodiment is a further optimization of the above embodiment. The connecting mechanism includes a third connecting pipe 5, a second mounting plate 7, and a third mounting plate 8. A third connecting pipe 5 is fixedly connected between the first housing 1 and the first connecting pipe 3. A second mounting plate 7 is fixedly installed inside the upper end of the third connecting pipe 5. A third screw hole that penetrates up and down is opened at the upper end of the second mounting plate 7 corresponding to the position of the first screw hole. A third mounting plate 8 is fixedly installed inside the lower end of the third connecting pipe 5. A fourth screw hole that penetrates up and down is opened at the lower end of the third mounting plate 8 corresponding to the position of the second screw hole. A connecting rod 18 is fixedly connected between the second mounting plate 7 and the third mounting plate 8. A second thread groove is opened at the upper end of the connecting rod 18 corresponding to the position of the third screw hole. The lower end of the first conduction rod 9 passes through the lower end of the third screw hole and is screwed into the second thread groove. The lower end of the connecting rod 18 is fixedly connected with a second conduction rod 10. The lower end of the second conduction rod 10 passes through the lower end of the fourth screw hole and is screwed into the first thread groove.

[0024] In this embodiment, a third connecting pipe 5 is provided, which can increase or decrease the distance between the test rod 16 and the handle 15 according to the site requirements, facilitating the operation of the staff. Specifically, during installation, the lower end of the first conduction rod 9 is screwed into the second thread groove, and the lower end of the second conduction rod 10 is screwed into the first thread groove, so that the third connecting pipe 5 can be fixed between the first housing 1 and the second housing 2, and the distance between the first housing 1 and the second housing 2 can be adjusted, further reducing the risk of the staff accidentally touching the motor shaft and facilitating the staff to observe the readings on the voltage detection unit; when the site is narrow, rotate the first housing 1 so that the first conduction rod 9 is no longer screwed into the second thread groove, and then rotate the third connecting pipe 5 so that the second conduction pipe is no longer screwed into the first thread groove, and then remove the third connecting pipe 5. After that, screw the first conduction rod 9 into the first thread groove, which can reduce the distance between the test rod 16 and the handle 15, facilitating the staff to operate in a narrow space and facilitating carrying.

[0025] Embodiment 3, as shown in the attached Figure 1 、 2 、3, this embodiment is a further optimization of the above embodiment. The grounding module includes a grounding port 13 and a grounding clip 14. A vertically penetrating grounding hole is opened at the lower end of the handle 15, and the grounding port 13 is installed in the grounding hole. The voltage detection unit is connected to the grounding port 13, and the grounding port 13 is connected to the grounding clip 14. The grounding port 13 is a known ground wire connector, and the grounding clip 14 is a known metal alligator clip. In this embodiment, the grounding clip 14 is provided to facilitate the staff to clip the grounding clip 14 to an external grounding copper bar or grounding rod during detection.

[0026] Embodiment 4, as shown in the attached Figure 1 、 2 、3, this embodiment is a further optimization of the above embodiment. An installation hole penetrating through the front and back is opened on the front side of the upper part of the handle 15, and a switch module 12 is installed in the installation hole. The switch module 12 is connected to the voltage detection unit. The switch module 12 is a known electric switch, and the switch module 12 is provided on the outer side of the upper part of the handle 15, enabling the staff to conveniently turn on or off the voltage detection unit.

[0027] Embodiment 5, as shown in the attached Figure 3 shown, this embodiment is a further optimization of the above embodiment. The voltage detection unit includes a measurement module 11 and a storage module, and the measurement module 11 is connected to the storage module. The measurement module 11 is a known technology, and a voltage test record table with the model MIK-RC known in the art can be used. The storage module is a known data storage device. In this embodiment, a storage module is provided. When in use, the storage module is taken out and connected to an external host, which can facilitate the staff to analyze the shaft voltage parameters recorded in the measurement module 11 and is conducive to quickly identifying the cause of the abnormality when the shaft voltage of the unit is abnormal.

[0028] Example VI, as shown in the attached Figure 1 and 2 As shown, this example is a further optimization of the above examples. A brush pigtail 17 is fixedly installed at the upper end of the test rod 16. In this example, the brush pigtail 17 is provided. When the exposed part of the motor shaft is located on the rotating surface of the motor shaft, the brush pigtail 17 can be placed on the rotating surface of the motor shaft for convenient detection.

[0029] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effects. Non-essential technical features can be added or subtracted according to actual needs to meet the requirements of different situations.

Claims

1. A shaft voltage detection device, characterized in that The utility model comprises a first shell, a second shell, a first connecting pipe, a second connecting pipe and a voltage detection unit. A first screw hole which passes through the upper and lower parts is provided at the center of the lower end of the first shell. A first conducting rod is screwed in the first screw hole. A test rod is fixedly connected to the upper end of the first conducting rod. The upper end of the test rod passes through the upper end of the first shell and is located above the first shell. A second shell is provided below the first shell. A first connecting pipe is fixedly connected to the upper end of the second shell. A first mounting plate is fixedly installed on the inner side of the upper end of the first connecting pipe. A second screw hole which passes through the upper end of the first mounting plate corresponding to the position of the first screw hole is provided. A conducting seat is fixedly installed on the lower end of the first mounting plate. A first threaded groove is provided on the upper end of the conducting seat corresponding to the position of the second screw hole. A connecting mechanism for increasing the distance between the first shell and the second shell is fixedly connected between the first shell and the first connecting pipe. A voltage detection unit is provided in the second shell. A second connecting pipe is fixedly connected to the lower end of the second shell. A cylindrical handle is fixedly connected to the lower end of the second connecting pipe. A grounding module is provided at the lower end of the handle. The voltage detection unit is respectively connected to the grounding module and the conducting seat. The conducting seat is connected to the first conducting rod.

2. The shaft voltage detection device according to claim 1, characterized in that The connecting mechanism includes a third connecting tube, a second mounting plate and a third mounting plate. The third connecting tube is fixedly connected between the first shell and the first connecting tube, the second mounting plate is fixedly installed on the inner side of the upper end of the third connecting tube, a third screw hole is provided at the upper end of the second mounting plate corresponding to the position of the first screw hole, and the third mounting plate is fixedly installed on the inner side of the lower end of the third connecting tube, a fourth screw hole is provided at the lower end of the third mounting plate corresponding to the position of the second screw hole, a connecting rod is fixedly connected between the second mounting plate and the third mounting plate, a second threaded groove is provided at the upper end of the connecting rod corresponding to the position of the third screw hole, the lower end of the first conducting rod passes through the lower end of the third screw hole and is screwed in the second threaded groove, the lower end of the connecting rod is fixedly connected to the second conducting rod, the lower end of the second conducting rod passes through the lower end of the fourth screw hole and is screwed in the first threaded groove.

3. The shaft voltage detection device according to claim 1 or 2, characterized in that The grounding module includes a grounding port and a grounding clamp. A grounding hole that runs through the handle is opened at the lower end. The grounding port is installed in the grounding hole. The voltage detection unit is connected to the grounding port, and the grounding port is connected to the grounding clamp.

4. The shaft voltage detection device according to claim 1 or 2, characterized in that A mounting hole that penetrates from front to back is opened on the front side of the upper part of the handle, a switch module is installed in the mounting hole, and the switch module is connected to the voltage detection unit.

5. The shaft voltage detection device according to claim 3, characterized in that A mounting hole that penetrates from front to back is opened on the front side of the upper part of the handle, a switch module is installed in the mounting hole, and the switch module is connected to the voltage detection unit.

6. The shaft voltage detection device according to claim 1, 2 or 5, characterized in that The voltage detection unit includes a measuring module and a storage module, and the measuring module is connected to the storage module.

7. The shaft voltage detection device according to claim 3 is characterized in that The voltage detection unit includes a measuring module and a storage module, and the measuring module is connected to the storage module.

8. The shaft voltage detection device according to claim 1, 2, 5 or 7, characterized in that A brush braid is fixedly installed on the upper end of the test rod.

9. The shaft voltage detection device according to claim 3, characterized in that A brush braid is fixedly installed on the upper end of the test rod.

10. The shaft voltage detection device according to claim 6, characterized in that A brush braid is fixedly installed on the upper end of the test rod.

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