Voltage and current simultaneous measurement connector for hydro-generator rotor

Abstract

A voltage and current simultaneous measurement connector for a hydro-generator rotor comprises a female plug-in and a male plug-in matched with the female plug-in, the female plug-in is connected with the bottom of an insulating shell through a rotating nut, the top of the insulating shell is connected with a waterproof connector shell, a waterproof connector nut is arranged on the waterproof connector shell, and the male plug-in is connected with the waterproof connector nut. A waterproof connector is arranged in the waterproof connector shell, a first insulating part is arranged in the insulating shell, the waterproof connector is connected with the first insulating part through a threaded part, and an insulating cavity is formed between the first insulating part and the female plug-in. By the adoption of the structure, connection between 200A large current and 3kV alternating current voltage is completed at a time, multiple times of connection of a voltage line and a current line are avoided, and the test efficiency is improved; mutual insulation of a large current line and a large voltage line is realized, the safety of testers can be improved, and potential safety hazards caused by interference of the current line and the voltage line are avoided; the coaxial over-current and over-voltage measurement connector is not simply piled up, and the coaxial over-current and over-voltage measurement connector can reduce the size of the whole project and is convenient to carry.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment measurement, in particular to a voltage and current simultaneous measurement connector for a hydro-generator rotor. Background Art

[0002] According to the industry standard DL / T596-2021 "Preventive Test Procedures for Electrical Equipment", the rotor insulation resistance test is subject to a 2.5kV / 6mA high-voltage DC power supply; the rotor AC withstand voltage test is subject to a 2.5kV / 2A high-voltage AC power supply; the rotor DC resistance test is subject to a 200A / 40V low-voltage DC power supply; and the rotor AC impedance test is subject to a 200V / 1A low-voltage AC power supply.

[0003] When a hydro-generator undergoes the aforementioned preventive testing, it must meet a current of at least 200A and a voltage of 3kV. This requires the connection of multiple current and voltage wires, which are exposed and easily interfere with each other. This increases the risk factor and the number of test steps, reduces the efficiency of test personnel, and affects the accuracy of test results. To address these shortcomings, a coaxial overcurrent and overvoltage measurement connector for hydro-generator rotors is proposed. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a voltage and current simultaneous measurement connector for a hydro-generator rotor, which can realize the conduction of a large current of 200A and an AC voltage of 3kV at one time, avoid multiple connections of the voltage line and the current line, and improve the test efficiency; realize the mutual insulation of the large current line and the large voltage line, which can improve the safety of the test personnel and avoid the potential safety hazards caused by the interference between the current line and the voltage line; rather than a simple stacking of instruments, the coaxial overcurrent and overvoltage measurement connector can reduce the volume of the entire project and facilitate portability.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a voltage and current simultaneous measurement connector for a hydro-generator rotor, comprising a female plug-in and a male plug-in cooperating therewith, wherein the female plug-in is connected to the bottom of an insulating shell by a rotating nut, and the top of the insulating shell is connected to a waterproof joint shell, a waterproof joint nut is provided on the waterproof joint shell, a waterproof joint is provided in the waterproof joint shell, a first insulating member is provided in the insulating shell, the waterproof joint is connected to the first insulating member by a threaded member, an insulating cavity is formed between the first insulating member and the female plug-in, an overcurrent female plug-in is provided at the bottom of the female plug-in, a female current wire welding hole and a first current insulating member are provided in the female plug-in, the first current insulating member is connected to the female plug-in by a first tightening member and a second tightening member, and a female voltage wire welding hole and an overvoltage female plug-in are provided in the first current insulating member;

[0006] The bottom of the male plug is provided with a tightening part, and a positioning guide hole, an overvoltage male plug and an overcurrent male plug are provided in the male plug. The overvoltage male plug is connected to the overcurrent male plug through a second current insulating part. The bottom of the overvoltage male plug is provided with a male voltage wire welding hole, and the bottom of the overcurrent male plug is provided with a first male current wire welding hole and a second male current wire welding hole.

[0007] In a preferred solution, a second insulating member is provided on the rotating nut, and the rotating nut cooperates with a first connector tightening member provided on the outside of the female plug-in.

[0008] In a preferred solution, the male plug-in is provided with a second connector tightening member, and the second connector tightening member cooperates with a fastening threaded member provided on the overcurrent male plug-in.

[0009] In a preferred solution, an insulating protective sleeve is provided on the male plug.

[0010] In the preferred solution, an overvoltage welding wire hole is provided at the top center of the waterproof joint, a plurality of overcurrent welding wire holes are arranged on the outer circle of the overvoltage welding wire hole, a plurality of fixing holes are arranged on the periphery of the overcurrent welding wire hole, and a plurality of fixing holes are also arranged on the top of the rotating nut.

[0011] The utility model provides a voltage and current simultaneous measurement connector for a hydro-generator rotor, which has the following beneficial effects by adopting the above structure:

[0012] (1) Achieve one-time completion of the conduction of 200A high current and 3kV AC voltage, avoiding multiple connections of voltage and current lines, and improving test efficiency;

[0013] (2) The insulation between the high current line and the high voltage line can improve the safety of the test personnel and avoid the potential safety hazards caused by the interference between the current line and the voltage line;

[0014] (3) It is not just a simple stacking of instruments. The connectors for coaxial overcurrent and overvoltage measurement can reduce the size of the entire project and make it easier to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the female plug-in structure of the present utility model.

[0017] Figure 2 This is a schematic diagram of the male plug structure of the present utility model.

[0018] Figure 3 This is a schematic diagram of the internal structure of the female plug-in of the present utility model.

[0019] Figure 4 This is a schematic diagram of the internal structure of the male plug-in of the present utility model.

[0020] Figure 5 This is a top view of the female plug-in structure of the present utility model.

[0021] In the figure: waterproof connector housing 1, waterproof connector nut 2, insulating housing 3, rotating nut 4, female plug-in 5, male plug-in 6, insulating protective sleeve 7, top tightening member 8, waterproof connector 9, threaded member 10, first insulating member 11, insulating cavity 12, female current wire welding hole 13, second insulating member 14, female voltage wire welding hole 15, first tightening member 16, second tightening member 17, first current insulating member 18, overvoltage female plug-in 19, overcurrent female plug-in 20, first connector tightening member 21, positioning guide hole 22, second connector tightening member 23, overvoltage male plug-in 24, overcurrent male plug-in 25, second current insulating member 2 6. Male voltage wire welding hole 27, fastening screw 28, first male current wire welding hole 29, second male current wire welding hole 30, overvoltage welding hole 31, first overcurrent welding hole 32, second overcurrent welding hole 33, third overcurrent welding hole 34, fourth overcurrent welding hole 35, fifth overcurrent welding hole 36, sixth overcurrent welding hole 37, seventh overcurrent welding hole 38, eighth overcurrent welding hole 39, first fixing hole 40, second fixing hole 41, third fixing hole 42, fourth fixing hole 43, fifth fixing hole 44, sixth fixing hole 45, seventh fixing hole 46, eighth fixing hole 48, ninth fixing hole 49. DETAILED DESCRIPTION

[0022] Example 1:

[0023] like Figure 1-5 A voltage and current measuring connector for a hydro-generator rotor includes a female plug-in 5 and a male plug-in 6 mating therewith. The female plug-in 5 is connected to the bottom of an insulating housing 3 via a rotating nut 4. The top of the insulating housing 3 is connected to a waterproof joint housing 1. A waterproof joint nut 2 is provided on the waterproof joint housing 1. A waterproof joint 9 is provided in the waterproof joint housing 1. A first insulating member 11 is provided in the insulating housing 3. The waterproof joint 9 is connected to the first insulating member 11 via a threaded member 10. An insulating cavity 12 is formed between the first insulating member 11 and the female plug-in 5. An overcurrent female plug-in 20 is provided at the bottom of the female plug-in 5. A female current wire welding hole 13 and a first current insulating member 18 are provided in the female plug-in 5. The first current insulating member 18 is connected to the female plug-in 5 via a first tightening member 16 and a second tightening member 17. A female voltage wire welding hole 15 and an overvoltage female plug-in 19 are provided in the first current insulating member 18.

[0024] The bottom of the male plug 6 is provided with a tightening part 8, and the male plug 6 is provided with a positioning guide hole 22, an overvoltage male plug 24 and an overcurrent male plug 25. The overvoltage male plug 24 is connected to the overcurrent male plug 25 through a second current insulating part 26. The bottom of the overvoltage male plug 24 is provided with a male voltage wire welding hole 27, and the bottom of the overcurrent male plug 25 is provided with a first male current wire welding hole 29 and a second male current wire welding hole 30.

[0025] In a preferred solution, a second insulating member 14 is provided on the rotating nut 4 , and the rotating nut 4 cooperates with a first connector tightening member 21 provided on the outside of the female plug 5 .

[0026] In a preferred embodiment, the male plug-in 6 is provided with a second connector tightening member 23 , and the second connector tightening member 23 cooperates with a fastening threaded member 28 provided on the overcurrent male plug-in 25 .

[0027] In a preferred solution, an insulating protective sleeve 7 is provided on the male plug 6 .

[0028] In the preferred embodiment, an overvoltage welding wire hole 31 is provided at the top center of the waterproof joint 9, a plurality of overcurrent welding wire holes are arranged on the outer circle of the overvoltage welding wire hole 31, a plurality of fixing holes are arranged on the periphery of the overcurrent welding wire hole, and a plurality of fixing holes are also arranged on the top of the rotating nut.

[0029] Example 2:

[0030] like Figure 1-5 In the figure, the waterproof connector 9 has an overvoltage welding hole 31 at the top center. The overvoltage welding hole 31 is surrounded by eight overcurrent welding holes: the first overcurrent welding hole 32, the second overcurrent welding hole 33, the third overcurrent welding hole 34, the fourth overcurrent welding hole 35, the fifth overcurrent welding hole 36, the sixth overcurrent welding hole 37, the seventh overcurrent welding hole 38, and the eighth overcurrent welding hole 39. The overcurrent welding holes are surrounded by four fixing holes: the first fixing hole 40, the second fixing hole 41, the third fixing hole 42, and the fourth fixing hole 43. The top of the rotating nut 4 is provided with five fixing holes: the fifth fixing hole 44, the sixth fixing hole 45, the seventh fixing hole 46, the eighth fixing hole 47, and the ninth fixing hole 48.

[0031] The method of using the utility model is as follows:

[0032] The specific wiring process of the voltage line connecting to the female plug-in 5 is as follows: the voltage line enters the insulating cavity 12 through the overvoltage welding hole 31 at the top of the waterproof connector 9 until the voltage line is welded at the female voltage line welding hole 15. The first tightening member 16 and the second tightening member 17 on both sides of the female voltage line welding hole 15 fix the voltage line in the insulating cavity 12, and finally tighten the waterproof connector nut 2 to ensure that the voltage line does not fall off.

[0033] The specific wiring process of connecting the current line to the female plug 5 is: the current line enters the insulating cavity 12 through the eight overcurrent welding holes on the top of the waterproof connector 9, and then the current line is welded tightly at the female current wire welding hole 13, and finally the waterproof connector nut 2 is tightened to ensure that the current line does not fall off.

[0034] The specific wiring process of the voltage line connecting to the male plug 6 is: the voltage line is connected to the male voltage line welding hole 27 through the bottom of the tightening piece 8, the welding hole welds the voltage line tightly, and finally tightens the tightening piece 8 to ensure that the voltage line does not fall off.

[0035] The specific wiring process of the current wire connecting to the male plug 6 is as follows: the current wire is connected to the first male current wire welding hole 29 and the second male current wire welding hole 30 through the bottom of the insulating protective sleeve 7, and the welding holes weld the current wires tightly.

[0036] When conducting preventive testing of the hydro-turbine generator rotor, including rotor DC resistance, rotor AC impedance, rotor AC withstand voltage, and rotor insulation resistance, female connector 5 is docked with male connector 6. When the overvoltage female connector 19 is docked with the overvoltage male connector 24, the crown spring in overvoltage female connector 19 presses against overvoltage male connector 24. When the overcurrent female connector 20 is docked with the overcurrent male connector 25, the spring contact in overcurrent female connector 20 presses against overcurrent male connector 25. The entire female connector 5 is placed within the positioning guide hole 22 in male connector 6. The voltage lines in female connector 5 are electrically connected to the voltage lines in male connector 6, ensuring the passage of 3kV AC current during the test. The current lines in the female connector are electrically connected to the current lines in the male connector, ensuring the passage of a high current of 200A during the test.

[0037] The beneficial effects of the utility model are: it can complete the conduction of 200A high current and 3kV AC voltage at one time, avoid multiple connections of voltage lines and current lines, and improve test efficiency; it can achieve mutual insulation between high current lines and high voltage lines, which can improve the safety of test personnel and avoid potential safety hazards caused by interference between current lines and voltage lines; it is not a simple stacking of instruments, and the coaxial overcurrent and overvoltage measurement connector can reduce the size of the entire project and make it easy to carry.

Claims

1. A voltage and current measuring connector for a hydro-generator rotor, comprising a female connector (5) and a male connector (6) mating therewith, characterized in that: The female plug-in (5) is connected to the bottom of the insulating shell (3) through a rotating nut (4), and the top of the insulating shell (3) is connected to the waterproof joint shell (1). The waterproof joint shell (1) is provided with a waterproof joint nut (2), and the waterproof joint shell (1) is provided with a waterproof joint (9). The insulating shell (3) is provided with a first insulating member (11). The waterproof joint (9) is connected to the first insulating member (11) through a threaded member (10). An insulating cavity (12) is formed between the first insulating member (11) and the female plug-in (5). An overcurrent female plug-in (20) is provided at the bottom of the female plug-in (5). A female current wire welding hole (13) and a first current insulating member (18) are provided in the female plug-in (5). The first current insulating member (18) is connected to the female plug-in (5) through a first tightening member (16) and a second tightening member (17). A female voltage wire welding hole (15) and an overvoltage female plug-in (19) are provided in the first current insulating member (18). The bottom of the male plug-in (6) is provided with a tightening member (8), and a positioning guide hole (22), an overvoltage male plug-in (24) and an overcurrent male plug-in (25) are provided in the male plug-in (6). The overvoltage male plug-in (24) is connected to the overcurrent male plug-in (25) through a second current insulating member (26). The bottom of the overvoltage male plug-in (24) is provided with a male voltage wire welding hole (27), and the bottom of the overcurrent male plug-in (25) is provided with a first male current wire welding hole (29) and a second male current wire welding hole (30).

2. A voltage and current simultaneous measurement connector for a hydro-generator rotor according to claim 1, characterized in that: The rotating nut (4) is provided with a second insulating member (14), and the rotating nut (4) cooperates with a first connector tightening member (21) provided on the outside of the female plug-in unit (5).

3. The voltage and current simultaneous measurement connector for a hydro-generator rotor according to claim 1, characterized in that: The male plug-in (6) is provided with a second connector tightening member (23), and the second connector tightening member (23) cooperates with a fastening thread member (28) provided on the overcurrent male plug-in (25).

4. A voltage and current simultaneous measurement connector for a hydro-generator rotor according to claim 1, characterized in that: The male plug-in (6) is provided with an insulating protective sleeve (7).

5. The voltage and current simultaneous measurement connector for a hydro-generator rotor according to claim 1, characterized in that: The center of the top of the waterproof joint (9) is provided with an overvoltage welding wire hole (31), the outer circle of the overvoltage welding wire hole (31) is provided with a plurality of overcurrent welding wire holes, the periphery of the overcurrent welding wire hole is provided with a plurality of fixing holes, and the top of the rotating nut is also provided with a plurality of fixing holes.

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