A knife switch position confirmation device based on magnetic induction

Abstract

The present invention relates to the technical field of electrical components, and discloses a knife switch position confirmation device based on magnetic induction, including a power meter, a detection line is provided on the top of the power meter, a connector is provided at one end of the detection line, a plurality of pairs of side plates are fixedly installed around the outside of the connector at equal intervals, a rotating shaft is rotatably installed between each pair of the side plates, and a connecting plate is provided on the external fixed sleeve of the rotating shaft. The present invention wraps the connector by combining a plurality of guide plates, and the pointed cone formed by the guide plates can push the adjacent wire turns apart, so that the connector will not be blocked by the adjacent wire turns when passing through the wire turns, causing the connector to be blocked when passing through, so that the connector can easily pass through the narrow space between the adjacent wire turns, and the surface of the guide plate can be lubricated when the guide plate is combined, so that when the plate passes through the wire turns, it can pass more easily and smoothly, greatly reducing the resistance of the guide plate to the friction of the wire turns.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical components, and in particular relates to a switch position confirmation device based on magnetic induction. Background Art

[0002] At present, GIS equipment is more and more widely used. 220kV lines / main transformers often face hot-reversal operations. Since the knife switches of GIS equipment are sealed in an opaque casing, operators can only judge whether the knife switches are opened and closed in place during hot-reversal based on mechanical indications and bus tie switch currents. Then, after long-term operation, the mechanical position indication is prone to deviations. When performing hot bus switching operations, operators often operate in the control box of the high-voltage site, and the bus current can only be viewed in the background of the main control room or the bus differential protection screen of the relay room. Therefore, operators can only check the bus current after operating the switch in the control box. During this period of time, if the line / main transformer load current changes, it is impossible to accurately judge whether the switch is in place by the change of the bus current. Therefore, the electromagnetic induction principle is adopted in the existing technology. Multi-layer silicon steel sheets with air gaps are installed on each phase of the 200kV GIS switch, and a certain number of coils are wound on the silicon steel sheets to sense the primary current of the switch, and converted into digital quantities through analog-to-digital converters for intuitive display. The measurement range is matched by adjusting the air gap length of the silicon steel sheets and the number of turns of the secondary coil. In 220kV GIS equipment, the technology of using customized coils on flexible power meters to detect bus current and assist in judging the position of the switch is based on the principle of electromagnetic induction, combined with modern signal processing technology and power system automation technology. It is an innovative application method, and is a sensor device that can confirm the position of the switch.

[0003] When the existing sensor device for confirming the position of the knife switch is in use, when it is necessary to pass the connector on the flexible power meter through the adjacent wire turns, the size of the connector is larger than the size of the customized coil (i.e., the detection wire). When passing through the wire turns, the connector is easily blocked by the wire turns and becomes stuck, affecting the entire detection progress and the detection process.

[0004] Therefore, it is necessary to invent a knife switch position confirmation device based on magnetic induction to solve the above problems.

[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0006] In view of the above problems, the present invention provides a switch position confirmation device based on magnetic induction to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a knife switch position confirmation device based on magnetic induction, comprising a power meter, a detection line is provided on the top of the power meter, a connector is provided at one end of the detection line, a plurality of pairs of side plates are fixedly installed around the outside of the connector at equal intervals, a rotating shaft is rotatably installed between each pair of the side plates, a connecting plate is fixedly installed on the outside of the rotating shaft, a guide plate is fixedly installed on the outside of the connecting plate, both ends of the guide plate are provided with inclined surfaces, both ends of the rotating shaft extend to the outside of the side plate and are provided with torsion springs, the two ends of the torsion spring are respectively fixedly connected to the side plate and the rotating shaft, and a driving component for driving its forward rotation is provided on the outside of the rotating shaft.

[0008] Furthermore, the driving assembly includes a pull rope, and both sides of the rotating shaft are provided with a wire taking-up groove, one end of the pull rope is fixed in the wire taking-up groove, and the joint is provided with a channel for passing the pull rope, and the other end of the pull rope passes through the channel, and a plurality of pull ropes are commonly fixed with a swivel at one end away from the wire taking-up groove, and a ring plate is rotatably installed on the outside of the swivel, the outside of the detection line is provided with a thread, and the ring plate is threadedly sleeved on the outside of the detection line, and the pull rope is rolled up in the wire taking-up groove.

[0009] Furthermore, the guide plates are specifically configured to be arc-shaped strips, and the joints can be covered when a plurality of guide plates are rotated near one end of the joint to contact each other.

[0010] Furthermore, a cavity is provided inside the guide plate, a spray hole connected to the cavity is provided on the side of the guide plate away from the joint, the spray hole is located on the side away from the detection line, and an injection assembly for injecting lubricating oil into the cavity is provided outside the cavity.

[0011] Furthermore, the injection assembly includes a cylinder body fixed on the joint, the cylinder body corresponds to the guide plate, the outer lower part of the cylinder body is connected to the cavity through a hose, the external fixed sleeve of the joint is provided with an annular shell, the annular shell is connected to the cylinder body through a pipeline, the inside of the pipeline and the spray hole are both provided with a one-way valve, the side of the annular shell away from the pipeline is provided with a liquid filling hole, the liquid filling hole is provided with a plunger, the annular shell and the cylinder body are both provided with lubricating oil, and the inside of the cylinder body is provided with an extrusion assembly for cooperating with the guide plate to extrude the internal lubricating oil outward.

[0012] Furthermore, the extrusion assembly includes a piston arranged in a cylinder body, a pressure rod is fixedly installed on the top of the piston, an end of the pressure rod away from the piston passes through the cylinder body and extends to the outside thereof, and a spring is fixedly installed on the bottom of the piston.

[0013] Furthermore, the torsion force of the torsion spring can maintain the rotating shaft, the connecting plate and the guide plate in an inclined state when the pull rope is not pulled.

[0014] Furthermore, the number of the guide plates is at least six, and the guide plates are equidistantly arranged around the guide plates.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention wraps the joint by combining multiple guide plates, and the pointed cone formed by the guide plates can push the adjacent turns apart, so that the joint will not be blocked by the adjacent turns when passing through the turns, causing the joint to be blocked when passing through, so that the joint can easily pass through the narrow space between the adjacent turns;

[0017] 2. The present invention can lubricate the surface of the guide plate when the guide plate is combined, so that the plate can pass through the wire turns more easily and smoothly, greatly reducing the resistance of the guide plate caused by the friction of the wire turns. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of a switch position confirmation device based on magnetic induction according to an embodiment of the present invention is shown;

[0020] Figure 2 The structure diagram of the joint of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 3 The embodiment of the present invention is shown Figure 2 The enlarged structural diagram at A in the middle;

[0022] Figure 4 A schematic cross-sectional view of a joint according to an embodiment of the present invention is shown;

[0023] Figure 5 The embodiment of the present invention is shown Figure 4 The enlarged structural diagram at B in the middle;

[0024] Figure 6 The structure diagram of the joint of the embodiment of the present invention is shown in FIG. Figure 2 ;

[0025] In the figure: 1. power meter; 2. detection line; 3. connector; 4. side plate; 5. rotating shaft; 6. connecting plate; 7. guide plate; 8. inclined plane; 9. torsion spring; 10. pull rope; 11. swivel; 12. ring plate; 13. thread; 14. cavity; 15. spray hole; 16. one-way valve; 17. cylinder body; 18. hose; 19. annular shell; 20. pipeline; 21. piston; 22. pressure rod; 23. spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0027] The present invention provides a switch position confirmation device based on magnetic induction, such as Figures 1 to 6 As shown, it includes a power meter 1, a detection line 2 is provided on the top of the power meter 1, the power meter 1 is a flexible power meter in the prior art, the detection line 2 is the detection line on the flexible power meter in the prior art, a joint 3 is provided at one end of the detection line 2, a plurality of pairs of side plates 4 are fixedly installed around the outer side of the joint 3 at equal intervals, a rotating shaft 5 is rotatably installed between each pair of side plates 4, a connecting plate 6 is fixedly sleeved on the outer side of the rotating shaft 5, a guide plate 7 is fixedly installed on the outer side of the connecting plate 6, and inclined surfaces 8 are provided at both ends of the guide plate 7, both ends of the rotating shaft 5 extend to the outer sleeve of the side plate 4 and are provided with a torsion spring 9, the two ends of the torsion spring 9 are fixedly connected to the side plate 4 and the rotating shaft 5 respectively, and a driving component for driving its forward rotation is provided on the outside of the rotating shaft 5.

[0028] When in use, the connector 3 is removed from the power meter 1, and the driving assembly drives the rotating shaft 5 to rotate forward with the connecting plate 6 and the guide plate 7, so that the multiple guide plates 7 away from the end of the detection line 2 are close to each other, and the torsion spring 9 is twisted to deform it to generate a force, and finally the multiple guide plates 7 are rotated away from the end of the detection line 2 to contact, forming a pointed cone, at which time the connector 3 is wrapped by the multiple guide plates 7, and then the detection line 2 is held and made to pass through the adjacent turns to be detected with the connector 3, the pointed cone formed by the guide plate 7 can push the adjacent turns apart, so that the connector 3 will not be blocked by the adjacent turns when passing through the turns, causing the connector 3 to be blocked when passing through, so that the connector 3 can easily pass through the narrow space between the adjacent turns, and when the connector 3 passes through multiple turns, the driving assembly cancels the drive of the rotating shaft 5, and the torsion spring 9 that is twisted and deformed releases the force to carry the rotating shaft 5 , connecting plate 6, guide plate 7 are rotated and reset, so that the end of guide plate 7 close to detection line 2 is fitted with the surface of detection line 2. At this time, the wrapping of connector 3 is cancelled, connector 3 is exposed, and then connector 3 is connected to power meter 1. At this time, the wire turns are in the area formed by detection line 2, connector 3, and power meter 1. The power meter 1 can detect whether the wire turns are energized, so as to confirm whether the knife switch has reached the predetermined position, thereby realizing the confirmation of the position of the knife switch. When the detection needs to be cancelled, connector 3 is separated from power meter 1, and detection line 2 is pulled to move with connector 3 and guide plate 7. When passing through the area between adjacent wire turns, since one end of guide plate 7 is fitted with detection line 2, a pointed cone is formed according to the above principle, so that the guide connector 3 can smoothly pass through the adjacent wire turns, so that the connector 3 will not be blocked by the adjacent wire turns and stuck, and finally the removal of connector 3 is completed.

[0029] like Figures 2 to 6 As shown, the driving assembly includes a pull rope 10, and both sides of the rotating shaft 5 are provided with a wire taking-up groove, one end of the pull rope 10 is fixed in the wire taking-up groove, and a channel for passing the pull rope 10 is provided on the joint 3, and the other end of the pull rope 10 passes through the channel, and a swivel 11 is fixedly installed at one end of the multiple pull ropes 10 away from the wire taking-up groove, and a ring plate 12 is rotatably installed on the outside of the swivel 11, a thread 13 is provided on the outside of the detection line 2, and the ring plate 12 is threadedly sleeved on the outside of the detection line 2, and the pull rope 10 is rolled up in the wire taking-up groove.

[0030] The ring plate 12 is rotated clockwise to make it move along the thread 13 away from the joint 3, so that the swivel 11 moves with it. The swivel 11 pulls the drawstring 10 to make it rotate forward with the rotating shaft 5, and twists the torsion spring 9 to make it twist and deform, thereby releasing the drawstring 10 from the wire taking-up groove. The ring plate 12 is rotated counterclockwise to make it move along the thread 13 toward the joint 3. At this time, since the drawstring 10 becomes loose, the torsion spring 9 releases its force to rotate and reset the rotating shaft 5, so that the drawstring 10 is wound in the wire taking-up groove, thereby driving the rotating shaft 5.

[0031] like Figure 2 As shown, the guide plate 7 is specifically configured as an arc strip, and the multiple guide plates 7 can cover the joint 3 when one end close to the joint 3 is rotated to contact each other.

[0032] The plurality of guide plates 7 can form a pointed cone to push the adjacent wire turns apart, thereby ensuring that the connector 3 can easily pass through the wire turns without jamming.

[0033] like Figures 2 to 5 As shown, a cavity 14 is provided inside the guide plate 7, and a spray hole 15 connected to the cavity 14 is provided on the side of the guide plate 7 away from the joint 3. The spray hole 15 is located on the side away from the detection line 2, and an injection component for injecting lubricating oil into the cavity 14 is provided outside the cavity 14.

[0034] When multiple guide plates 7 are close to each other away from one end of the detection line 2, the injection assembly is used to inject lubricating oil into the cavity 14, and the lubricating oil flows to the surface of the guide plate 7 through the spray hole 15. Subsequently, when the guide plate 7 passes through the adjacent wire turns, the lubricating oil is spread out by the adjacent wire turns, so that the lubricating oil exists on the outside of the guide plate 7 for lubrication. When the guide plate 7 passes through the wire turns subsequently, it can pass through more easily and smoothly, which greatly reduces the resistance of the guide plate 7 to the friction of the wire turns.

[0035] like Figures 2 to 5 As shown, the injection assembly includes a cylinder body 17 fixed on the joint 3, the cylinder body 17 corresponds to the guide plate 7, the outer lower part of the cylinder body 17 is connected to the cavity 14 through a hose 18, the outer fixed sleeve of the joint 3 is provided with an annular shell 19, the annular shell 19 is connected to the cylinder body 17 through a pipeline 20, and a one-way valve 16 is provided inside the pipeline 20 and the spray hole 15. A liquid filling hole is provided on the side of the annular shell 19 away from the pipeline 20, and a plunger is provided in the liquid filling hole. Lubricating oil is provided in the annular shell 19 and the cylinder body 17, and an extrusion assembly is provided inside the cylinder body 17 for cooperating with the guide plate 7 to extrude the internal lubricating oil outward.

[0036] When the ends of the guide plates 7 away from the detection line 2 are close to each other, the guide plates 7 cooperate with the extrusion assembly to squeeze the lubricating oil in the cylinder 17 outward. At this time, the one-way valve 16 located in the pipeline 20 is closed, and the lubricating oil enters the cavity 14 through the hose 18, fills the cavity 14, pushes open the one-way valve 16 in the spray hole 15, and flows to the surface of the guide plate 7. When the guide plate 7 rotates and resets, the extrusion assembly works in the reverse direction to draw the lubricating oil into the cylinder 17. At this time, the one-way valve 16 located in the spray hole 15 is closed, and the one-way valve 16 located in the pipeline 20 is opened, and the lubricating oil in the annular shell 19 is drawn into the cylinder 17 through the pipeline 20.

[0037] like Figure 5As shown, the extrusion assembly includes a piston 21 disposed in a cylinder body 17 , a pressure rod 22 is fixedly mounted on the top of the piston 21 , an end of the pressure rod 22 away from the piston 21 extends through the cylinder body 17 to the outside thereof, and a spring 23 is fixedly mounted on the bottom of the piston 21 .

[0038] When the ends of the guide plates 7 away from the detection line 2 are close to each other, the guide plates 7 squeeze the pressure rod 22 to make it move with the piston 21 in the direction close to the joint 3, so that the compression spring 23 deforms it to generate a force, and as the piston 21 moves, the lubricating oil in the cylinder 17 is squeezed outward. When the guide plates 7 rotate and reset, the compressed spring 23 releases the force to reset the piston 21, so that the lubricating oil in the annular shell 19 is drawn into the cylinder 17.

[0039] like Figure 2 As shown, the torsion force of the torsion spring 9 can maintain the rotating shaft 5, the connecting plate 6 and the guide plate 7 in an inclined state when the pull rope 10 is not pulled.

[0040] When the detection line 2 is separated from the wire turn to cancel the detection, the plurality of guide plates 7 can be in a pointed cone shape, so as to facilitate the removal of the connector 3 .

[0041] like Figure 2 As shown, the number of the guide plates 7 is at least six, and the multiple guide plates 7 are equidistantly arranged around.

[0042] The plurality of guide plates 7 can better cover the connector 3, thereby ensuring that the connector 3 can pass through the turns without hindrance.

[0043] Working principle: When in use, remove the connector 3 from the power meter 1, rotate the ring plate 12 clockwise to make it move along the thread 13 in the direction away from the connector 3, so that the swivel 11 moves with it, the swivel 11 pulls the pull rope 10 to make it rotate forward with the rotating shaft 5, twist the torsion spring 9 to make it twist and deform, thereby releasing the pull rope 10 from the wire taking-up groove, and finally multiple guide plates 7 are rotated away from one end of the detection line 2 to contact, forming a pointed cone, at this time, the connector 3 is wrapped by multiple guide plates 7, and then the detection line 2 is held and made to pass through the adjacent wire turns to be detected with the connector 3. The pointed cone formed by the guide plate 7 can push the adjacent wire turns apart, so that the connector 3 will not be blocked by the adjacent wire turns when passing through the wire turns, causing the connector 3 to be blocked when passing through. , so that the connector 3 can easily pass through the narrow space between the adjacent wire turns. After the connector 3 passes through multiple wire turns, the ring plate 12 is rotated counterclockwise to make it move along the thread 13 toward the connector 3. At this time, since the pull rope 10 becomes loose, the torsion spring 9 releases the force to rotate and reset the shaft 5, so that the pull rope 10 is rolled up in the wire-receiving groove, and the guide plate 7 is rotated and reset, canceling the wrapping of the connector 3, and the connector 3 is exposed to the outside. Then the connector 3 is connected to the power meter 1. At this time, the wire turns are in the area formed by the detection line 2, the connector 3, and the power meter 1. The power meter 1 can detect whether the wire turns are energized, thereby confirming whether the knife switch has reached the predetermined position, and realizing the confirmation of the position of the knife switch. When the detection needs to be cancelled, the connector 3 is connected to the power meter 1. The rate meter 1 is separated, and the detection line 2 is pulled to move with the connector 3 and the guide plate 7. When passing through the area between the adjacent wire turns, one end of the guide plate 7 is in contact with the detection line 2, and a pointed cone is formed according to the above principle, so that the guide connector 3 can pass through the adjacent wire turns smoothly, so that the connector 3 will not be blocked by the adjacent wire turns and get stuck, and the removal of the connector 3 is finally completed; when the ends of the multiple guide plates 7 away from the detection line 2 are close to each other, the guide plate 7 squeezes the pressure rod 22 to move with the piston 21 in the direction close to the connector 3, so that the compression spring 23 deforms it to generate a force, and with the movement of the piston 21, the lubricating oil in the cylinder 17 is squeezed outward, and the one-way valve 16 in the pipeline 20 is closed at this time, and the lubricating oil passes through the soft The tube 18 enters the cavity 14, fills the cavity 14, pushes open the one-way valve 16 in the spray hole 15 and flows to the surface of the guide plate 7. Then, when the guide plate 7 passes through the adjacent wire turns, the lubricating oil is spread out by the adjacent wire turns, so that the lubricating oil on the outside of the guide plate 7 is lubricated. When the guide plate 7 passes through the wire turns later, it can pass through more easily and smoothly, greatly reducing the resistance of the guide plate 7 to the friction of the wire turns. When the guide plate 7 rotates and resets, the compressed spring 23 releases the force to reset the piston 21, so that the lubricating oil in the annular shell 19 is drawn into the cylinder body 17. At this time, the one-way valve 16 in the spray hole 15 is closed, and the one-way valve 16 in the pipe 20 is opened, and the lubricating oil in the annular shell 19 is drawn into the cylinder body 17 through the pipe 20.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A switch position confirmation device based on magnetic induction, comprising a power meter (1), characterized in that: The power meter (1) is provided with a detection line (2) at the top, a joint (3) is provided at one end of the detection line (2), a plurality of pairs of side plates (4) are fixedly installed around the outside of the joint (3) at equal intervals, a rotating shaft (5) is rotatably installed between each pair of the side plates (4), a connecting plate (6) is fixedly sleeved on the outside of the rotating shaft (5), a guide plate (7) is fixedly installed on the outside of the connecting plate (6), both ends of the guide plate (7) are provided with inclined surfaces (8), both ends of the rotating shaft (5) extend to the outside of the side plate (4) and are sleeved with torsion springs (9), the two ends of the torsion spring (9) are respectively fixedly connected to the side plate (4) and the rotating shaft (5), and a driving component for driving the rotating shaft (5) to rotate forward is provided on the outside; The driving assembly comprises a pull rope (10), both sides of the rotating shaft (5) are provided with a wire taking-up groove, one end of the pull rope (10) is fixed in the wire taking-up groove, the joint (3) is provided with a channel for passing the pull rope (10), the other end of the pull rope (10) passes through the channel, a rotating ring (11) is fixedly mounted on one end of a plurality of pull ropes (10) away from the wire taking-up groove, a ring plate (12) is rotatably mounted on the outside of the rotating ring (11), a thread (13) is provided on the outside of the detection line (2), the ring plate (12) is threadedly sleeved on the outside of the detection line (2), and the pull rope (10) is rolled up in the wire taking-up groove; A cavity (14) is provided inside the guide plate (7); a spray hole (15) communicating with the cavity (14) is provided on a side of the guide plate (7) away from the joint (3); the spray hole (15) is located on a side away from the detection line (2); and an injection assembly for injecting lubricating oil into the cavity (14) is provided outside the cavity (14); The injection assembly comprises a cylinder body (17) fixed on the joint (3), the cylinder body (17) corresponding to the guide plate (7), the outer lower part of the cylinder body (17) being connected to the cavity (14) via a hose (18), an annular shell (19) being provided on the outer fixed sleeve of the joint (3), the annular shell (19) being connected to the cylinder body (17) via a pipeline (20), a one-way valve (16) being provided inside the pipeline (20) and the spray hole (15), a liquid filling hole being provided on a side of the annular shell (19) away from the pipeline (20), a plunger being provided in the liquid filling hole, lubricating oil being provided in the annular shell (19) and the cylinder body (17), and an extrusion assembly being provided inside the cylinder body (17) for cooperating with the guide plate (7) to extrude the lubricating oil inside the cylinder body (17) outwards.

2. The switch position confirmation device based on magnetic induction according to claim 1 is characterized in that: The guide plate (7) is specifically configured as an arc-shaped strip, and when a plurality of the guide plates (7) are rotated near one end of the joint (3) until they are in contact with each other, the joint (3) can be covered.

3. The switch position confirmation device based on magnetic induction according to claim 1 is characterized in that: The extrusion assembly comprises a piston (21) arranged in a cylinder body (17), a pressure rod (22) is fixedly mounted on the top of the piston (21), an end of the pressure rod (22) away from the piston (21) passes through the cylinder body (17) and extends to the outside thereof, and a spring (23) is fixedly mounted on the bottom of the piston (21).

4. The switch position confirmation device based on magnetic induction according to claim 3 is characterized in that: The torsion force of the torsion spring (9) can maintain the rotating shaft (5), the connecting plate (6) and the guide plate (7) in an inclined state when the pull rope (10) is not pulled.

5. The switch position confirmation device based on magnetic induction according to claim 4 is characterized in that: The number of the guide plates (7) is at least six, and the plurality of guide plates (7) are arranged equidistantly around each other.

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