CN115616444A - An auxiliary grounding device for transmission line parameter testing - Google Patents

Abstract

It relates to the technical field of power transmission line parameter testing. The invention discloses an auxiliary grounding device for power transmission line parameter testing, which includes a workbench, a turning mechanism, a wire control box and an insulator. The four corners of the bottom of the workbench are fixed with feet; The mechanism includes a motor, the power output end of the motor is fixedly connected with a rotating rod, and several grounding knife switches are arranged on the outside of the rotating rod, several insulators are provided, and contact pieces are arranged on the top of the insulator; the present invention mainly When used for parameter testing of power transmission lines, it can be used instead of the on-site ground switch for switching wiring. It can also be used in other test items where flexible grounding is required. Since the current terminal of each phase is connected to the terminal board, the voltage terminal and the wiring The board is not connected, so after the contact piece is grounded, the induced current is released by the current line. When only the voltage line is connected for the test, the grounding knife switch action cannot release the induced voltage and current.

Description

An auxiliary grounding device for transmission line parameter testing

technical field

The invention relates to the technical field of transmission line parameter testing, in particular to an auxiliary grounding device for transmission line parameter testing.

Background technique

When the transmission line under test is open at both ends, due to the capacitive effect, the electrostatic induction voltage generated by the adjacent operating line is relatively high. This electrostatic induction voltage poses an important threat to the parameter test of the transmission line, directly damaging the test instrument and endangering personal safety. When the tested transmission line is grounded at one end and open-circuited at the other end, due to the electromagnetic induction of the operating circuit, the highest electromagnetic induction voltage at the open-circuit end will reach about 3kV.

However, if the line conductor is charged, there will be certain hidden dangers, and the actual work needs to avoid the occurrence of transmission line parameter test accidents.

Contents of the invention

The object of the present invention is to provide an auxiliary grounding device for testing transmission line parameters to solve the problem of avoiding transmission line parameter testing accidents in practical work.

In order to achieve the above purpose, the present invention provides the following technical solutions: an auxiliary grounding device for testing transmission line parameters, comprising:

A workbench, the four corners of the bottom of the workbench are fixed with feet;

An overturning mechanism, the overturning mechanism includes a motor, the power output end of the motor is fixedly connected with a rotating rod, and several grounding knife switches are arranged outside the rotating rod;

Wire control box;

Insulators, the insulators are provided with several, the top of the insulator is provided with a contact piece, and the top of the contact piece is provided with a wiring board;

Wherein, the turning mechanism is arranged at the top of the workbench, the wire control box is arranged at the bottom of the workbench, and the insulator is arranged above the workbench.

Preferably, it also includes:

Several buffer assemblies, the buffer assembly includes an outer sleeve and a telescopic rod slidably installed inside the outer sleeve, one end of the outer sleeve is fixedly mounted with an upper support, and one end of the telescopic rod is fixedly mounted with a lower support seat, a spring is fixedly installed between the upper support and the lower support;

Wherein, the buffer assembly is arranged at one end of the grounding switch.

Preferably, several support plates are fixedly installed on the top surface of the workbench, and a support frame is fixedly installed on the top of the support plates.

Preferably, several voltage terminal posts are fixedly installed on one side of the top of the terminal board, and several current terminal posts are fixedly installed on the other side of the top end of the terminal board.

Preferably, a conductive rod is fixedly connected between the grounding knife switches.

Preferably, it also includes:

Grounding wire, the grounding wire is provided with two;

Wherein, one end of the grounding wire is fixedly connected to the conductive rod, and the other end of the grounding wire is fixedly connected to the support plate.

Preferably, one end of the upper support is provided with a mounting groove, and one end of the lower support is provided with a card slot.

Preferably, a protrusion is fixedly installed at one end of the grounding switch, and the protrusion is rotatably connected to the installation groove through a rotating shaft.

Preferably, a rotating shaft is rotatably installed between the two support plates.

Preferably, the conductive rod is specifically made of copper.

Compared with prior art, the beneficial effect of the present invention is:

The present invention is mainly used for parameter testing of power transmission lines, instead of switching wiring on site, and can also be used in other test items where flexible grounding is required. Since the current terminal of each phase is connected to the wiring board, the voltage wiring The column and the terminal board are not connected, so after the contact piece is grounded, the induced current is released by the current line. When only the voltage line is connected for the test, the grounding knife switch cannot discharge the induced voltage and current.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the transmission line parameter testing auxiliary grounding device of the present invention;

Fig. 2 is the perspective view of the transmission line parameter test auxiliary grounding device of the present invention;

Fig. 3 is the front view of the auxiliary grounding device for testing transmission line parameters of the present invention;

Fig. 4 is a top view of the auxiliary grounding device for testing transmission line parameters of the present invention;

Fig. 5 is a schematic structural diagram of the buffer assembly of the transmission line parameter test auxiliary grounding device of the present invention;

Fig. 6 is a schematic diagram of an enlarged structure of A in Fig. 1;

FIG. 7 is a schematic diagram of an enlarged structure of B in FIG. 1 .

In the figure: 10-workbench; 11-support plate; 12-support frame; 20-leg; 30-overturning mechanism; 31-motor; 32-rotating rod; Block; 40-wire control box; 50-buffer assembly; 51-upper support; 52-lower support; 53-outer sleeve; 54-telescopic rod; 55-installation slot; 60-insulator; 61-contact sheet; 62-terminal board; 63-voltage terminal; 64-current terminal; 70-grounding wire.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1:

Referring to FIGS. 1-7 , the present invention provides a technical solution: an auxiliary grounding device for testing transmission line parameters, including a workbench 10 , a turning mechanism 30 , a wire control box 40 , a buffer assembly 50 and an insulator 60 .

Wherein, turning mechanism 30 comprises motor 31, and motor 31 is fixedly installed on the top surface of workbench 10 by motor bracket, and motor 31 power output end is fixedly connected with rotating rod 32, and rotating rod 32 can realize the turning over of grounding knife switch 33, and rotating rod Three grounding knife switches 33 are fixedly installed on the outside of 32 , the positions of the grounding knife switches 33 and the contact pieces 61 correspond one by one, and the grounding knife switches 33 can be in contact with the contact piece 61 .

Further, when the motor 31 works, it can drive the rotating rod 32 to rotate, and then it can drive the grounding knife switch 33 to overturn, so that the contact between the grounding knife switch 33 and the contact piece 61 can be realized, and the grounding and non-grounding of the contact piece 61 can be realized. .

Among them, there are three insulators 60, the top of the insulator 60 is fixed with a contact piece 61 by bolts, the top of the contact piece 61 is fixed with a terminal board 62, the terminal board 62 is made of aluminum, and the current terminal 64 of each phase is connected to the terminal board. 62 is connected, and the voltage terminal 63 is not connected to the terminal board 62. The three terminal boards 62 are A phase, B phase and C phase respectively, and three voltage terminal posts 63 are fixedly installed on the top side of the terminal board 62. The two voltage terminals 63 are connected to each other through wires, and one of the voltage terminals 63 is electrically connected to the transmission line through a wire, and the other voltage terminal 63 is electrically connected to the wire control box 40 through a wire. Three current terminals 64 are fixedly installed on the other side of the top of the plate 62, and the contact piece 61 and the grounding switch 33 are respectively made of copper.

Furthermore, after the contact piece 61 is grounded with the grounding switch 33, the induced current is discharged by means of the current wire. When only the voltage line is connected for testing, the action of the grounding switch 33 cannot discharge the induced voltage and current.

Wherein, four corners of the bottom end of the workbench 10 are fixedly installed with support feet 20 , and the standoffs 20 are used to support the workbench 10 .

Wherein, the turning mechanism 30 is arranged on the top of the workbench 10 , the wire control box 40 is arranged on the bottom of the workbench 10 , and the insulator 60 is arranged on the top of the workbench 10 .

In the preferred technical solution of this embodiment, four support plates 11 are fixedly installed on the top surface of the workbench 10, and bearing seats for the rotation of the rotation rod 32 are fixedly installed on the support plates 11, which can improve the stability of the rotation of the rotation rod 32. The support frame 12 is fixedly mounted on the top of the support plate 11, and the insulator 60 is fixedly mounted on the top of the support frame 12.

In a preferred technical solution of this embodiment, a conductive rod 34 is fixedly connected between the three grounding switches 33 , and the conductive rod 34 can conduct conductive communication between the three grounding switches 33 .

In the preferred technical solution of this embodiment, it also includes a grounding wire 70. There are two grounding wires 70, one end of the grounding wire 70 is fixedly connected to the conductive rod 34, and the other end of the grounding wire 70 is fixed to the support plate 11. connection, the support plate 11, the workbench 10 and the legs 20 are made of aluminum respectively and have excellent conductivity. Since the conductive rod 34 is made of copper material, it also has excellent conductivity. Therefore, the grounding wire 70 can The three grounding knife switches 33 are grounded.

In addition, according to an embodiment of the present invention:

1. The highest test voltage: 20kV, short-term (5s) allowable withstand voltage 25kV.

2. Pure resistive voltage divider, with an impedance of about 100M, is suitable for the measurement of AC induced voltage and DC charging voltage (under the action of inter-line capacitance, the DC voltage of the measured line caused by the DC transmission system).

3. Partition ratio: 1000:1.

4. Test accuracy: 5% (above 5% range).

5. During the insulation resistance test, evaluate whether the suppression device is connected or not. When testing transmission line parameters, it is necessary to make a correct assessment of whether and how to use the interference suppression device.

6. The withstand voltage of the high-voltage wiring part of the device to the ground: not less than 40kV.

7. Standard test down-conductor withstand voltage: not less than 20kV.

8. During the insulation resistance test, evaluate whether the suppression device is connected or not. When testing the transmission line parameters, make a correct evaluation of whether and how to put the interference suppression device into use.

Based on the above-mentioned embodiments, the present invention is mainly used for testing the parameters of transmission lines, instead of switching wiring on site, and it can also be used in other test items where flexible grounding is required. The board is connected, and the voltage terminal is not connected to the terminal board. Therefore, after the contact piece is grounded, the induced current is released by the current line. When only the voltage line is connected for the test, the grounding switch action cannot discharge the induced voltage and current. .

Example 2:

Referring to FIGS. 1-7 , the present invention provides a technical solution: an auxiliary grounding device for testing transmission line parameters, including a workbench 10 , a turning mechanism 30 , a wire control box 40 , a buffer assembly 50 and an insulator 60 .

Wherein, turning mechanism 30 comprises motor 31, and motor 31 is fixedly installed on the top surface of workbench 10 by motor bracket, and motor 31 power output end is fixedly connected with rotating rod 32, and rotating rod 32 can realize the turning over of grounding knife switch 33, and rotating rod Three grounding knife switches 33 are fixedly installed on the outside of 32 , the positions of the grounding knife switches 33 and the contact pieces 61 correspond one by one, and the grounding knife switches 33 can be in contact with the contact piece 61 .

Further, when the motor 31 works, it can drive the rotating rod 32 to rotate, and then it can drive the grounding knife switch 33 to overturn, so that the contact between the grounding knife switch 33 and the contact piece 61 can be realized, and the grounding and non-grounding of the contact piece 61 can be realized. .

Among them, there are three insulators 60, the top of the insulator 60 is fixed with a contact piece 61 by bolts, the top of the contact piece 61 is fixed with a terminal board 62, the terminal board 62 is made of aluminum, and the current terminal 64 of each phase is connected to the terminal board. 62 is connected, and the voltage terminal 63 is not connected to the terminal board 62. The three terminal boards 62 are A phase, B phase and C phase respectively, and three voltage terminal posts 63 are fixedly installed on the top side of the terminal board 62. The two voltage terminals 63 are connected to each other through wires, and one of the voltage terminals 63 is electrically connected to the transmission line through a wire, and the other voltage terminal 63 is electrically connected to the wire control box 40 through a wire. Three current terminals 64 are fixedly installed on the other side of the top of the plate 62, and the contact piece 61 and the grounding switch 33 are respectively made of copper.

Furthermore, after the contact piece 61 is grounded with the grounding switch 33, the induced current is discharged by means of the current wire. When only the voltage line is connected for testing, the action of the grounding switch 33 cannot discharge the induced voltage and current.

Wherein, four corners of the bottom end of the workbench 10 are fixedly installed with support feet 20 , and the standoffs 20 are used to support the workbench 10 .

Wherein, the turning mechanism 30 is arranged on the top of the workbench 10 , the wire control box 40 is arranged on the bottom of the workbench 10 , and the insulator 60 is arranged on the top of the workbench 10 .

In the preferred technical solution of this embodiment, the buffer assembly 50 includes an outer sleeve 53 and a telescopic rod 54 slidingly installed inside the outer sleeve 10. An upper support 51 is fixedly installed on one end of the outer sleeve 53, and one end of the telescopic rod 54 A lower support 52 is fixedly installed, and a spring 57 is fixedly installed between the upper support 51 and the lower support 52 .

Further, when the rotating rod 32 turns the grounding knife switch 33 upside down, the grounding knife switch 33 can drive the upper support 51 to move through the protrusion 35, and then can drive the telescopic rod 54 to slide in the outer sleeve 53. When the rod 32 returns the grounding knife switch 33 to the initial position, the upper support 51 can return to the initial position, and then it will act on the spring 57, and the spring 57 can realize buffering, and then the impact force after the overturn can be reversed.

Wherein, the buffer assembly 50 is disposed at one end of the grounding knife switch 33 .

In the preferred technical solution of this embodiment, four support plates 11 are fixedly installed on the top surface of the workbench 10, and bearing seats for the rotation of the rotation rod 32 are fixedly installed on the support plates 11, which can improve the stability of the rotation of the rotation rod 32. The support frame 12 is fixedly mounted on the top of the support plate 11, and the insulator 60 is fixedly mounted on the top of the support frame 12.

In a preferred technical solution of this embodiment, a conductive rod 34 is fixedly connected between the three grounding switches 33 , and the conductive rod 34 can conduct conductive communication between the three grounding switches 33 .

In the preferred technical solution of this embodiment, it also includes a grounding wire 70. There are two grounding wires 70, one end of the grounding wire 70 is fixedly connected to the conductive rod 34, and the other end of the grounding wire 70 is fixed to the support plate 11. connection, the support plate 11, the workbench 10 and the legs 20 are made of aluminum respectively and have excellent conductivity. Since the conductive rod 34 is made of copper material, it also has excellent conductivity. Therefore, the grounding wire 70 can The three grounding knife switches 33 are grounded.

In the preferred technical solution of this embodiment, one end of the upper support 51 is provided with a mounting groove 55, and one end of the grounding knife switch 33 is fixedly installed with a bump 35, and the bump 35 is rotationally connected to the mounting groove 55 through a rotating shaft. One end of the seat 52 is provided with a locking groove 56, wherein a rotating shaft is installed between the two supporting plates 11, and the locking groove 56 is stuck outside the rotating shaft, so that the rotation of the lower support 52 can be realized.

In the several embodiments provided by the present invention, it should be understood that the disclosed device can be implemented in other ways. The mutual welding or threaded connection or winding connection shown or discussed can be completed with the assistance of equipment, such as welding torch to realize welding, wrench to realize threaded connection, etc. The components of the device are made of various materials, such as aluminum alloy, steel Metal materials such as copper and copper are formed by casting or mechanical stamping.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus.

The above is only the embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (10)

1. The utility model provides a transmission line parameter testing auxiliary grounding device which characterized in that includes:

the device comprises a workbench (10), wherein support legs (20) are fixedly arranged at four corners of the bottom end of the workbench (10);

the turnover mechanism (30), the turnover mechanism (30) comprises a motor (31), the power output end of the motor (31) is fixedly connected with a rotating rod (32), and a plurality of grounding disconnecting links (33) are arranged outside the rotating rod (32);

a line control box (40);

the insulator (60), the insulator (60) is provided with a plurality of insulators, a contact blade (61) is arranged at the top end of the insulator (60), and a wiring board (62) is arranged at the top end of the contact blade (61);

the turnover mechanism (30) is arranged at the top end of the workbench (10), the wire control box (40) is arranged at the bottom end of the workbench (10), and the insulator (60) is arranged above the workbench (10).

2. The auxiliary grounding device for the transmission line parameter test according to claim 1, further comprising:

the buffer components (50) comprise outer sleeves (53) and telescopic rods (54) which are slidably mounted in the outer sleeves (10), an upper support (51) is fixedly mounted at one end of each outer sleeve (53), a lower support (52) is fixedly mounted at one end of each telescopic rod (54), and a spring (57) is fixedly mounted between each upper support (51) and each lower support (52);

wherein, the buffer component (50) is arranged at one end of the grounding disconnecting link (33).

3. The auxiliary grounding device for the transmission line parameter test according to claim 1, characterized in that: a plurality of supporting plates (11) are fixedly mounted on the surface of the top end of the workbench (10), and a supporting frame (12) is fixedly mounted at the top ends of the supporting plates (11).

4. The auxiliary grounding device for the power transmission line parameter test according to claim 1, wherein: a plurality of voltage wiring terminals (63) are fixedly mounted on one side of the top end of the wiring board (62), and a plurality of current wiring terminals (64) are fixedly mounted on the other side of the top end of the wiring board (62).

5. The auxiliary grounding device for the power transmission line parameter test according to claim 1, wherein: and a conductive rod (34) is fixedly connected between the grounding disconnecting links (33).

6. The auxiliary grounding device for the transmission line parameter test according to claim 1, further comprising:

the grounding wires (70), two of the grounding wires (70) are provided;

one end of the grounding wire (70) is fixedly connected with the conducting rod (34), and the other end of the grounding wire (70) is fixedly connected with the support plate (11).

7. The auxiliary grounding device for the power transmission line parameter test according to claim 2, wherein: one end of the upper support (51) is provided with a mounting groove (55), and one end of the lower support (52) is provided with a clamping groove (56).

8. The auxiliary grounding device for the power transmission line parameter test according to claim 1, wherein: and one end of the grounding disconnecting link (33) is fixedly provided with a convex block (35), and the convex block (35) is rotatably connected with the mounting groove (55) through a rotating shaft.

9. The auxiliary grounding device for the power transmission line parameter test according to claim 3, wherein: a rotating shaft is rotatably arranged between the two support plates (11).

10. The auxiliary grounding device for the power transmission line parameter test according to claim 5, wherein: the conducting rod (34) is made of copper materials.

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