CN115527787A - A Opening and Closing Double Confirmation Structure of Three-phase GIS Switch - Google Patents

Abstract

The invention provides a switching-on and switching-off double confirmation structure of a three-phase linkage GIS switch, wherein a switching-on and switching-off actuating mechanism of a GIS isolating switch comprises a driving unit and three gear transmission units connected with the driving unit, the driving unit is arranged in a mechanism phase, the gear transmission units are arranged in a gear box corresponding to three phases and are connected with moving contacts corresponding to the phases, and the switching-on and switching-off double confirmation structure comprises a first confirmation structure and two second confirmation structures; the first confirmation structure is arranged in the mechanism phase, connected with an output shaft of a driving motor in the driving unit and used for detecting the rotation angle of the output shaft of the driving motor and judging the opening and closing operation of the GIS disconnecting switch; and the three second confirmation structures are respectively arranged in a middle phase gear box and two side phase gear boxes, are connected with a middle transmission shaft entering the gear box and a phase body output shaft leaving the gear box in the gear transmission unit, and are used for detecting the rotation angle of the phase body output shaft to judge the opening and closing operation of the GIS disconnecting switch.

Description

A Opening and Closing Double Confirmation Structure of Three-phase GIS Switch

technical field

The invention belongs to the technical field of high-voltage electrical equipment, and in particular relates to a double-confirmation structure for opening and closing of a three-phase linkage GIS switch.

Background technique

At present, the three-phase linkage structure of the 252kV GIS three-position isolation and grounding switch is that the mechanism converts electrical signals into mechanical energy, which is transmitted to the three-position isolation and grounding switch body through the output shaft of the mechanism to drive the opening and closing action. Feedback of the electrical signal of the opening and closing position through the auxiliary switch inside the mechanism cannot meet the requirement of double confirmation of "one-button sequential control", that is, at least two non-same principles or non-homologous indication switch position changes.

At present, when the structure of the GIS three-phase linkage isolating switch is opened and closed, the secondary signal is fed back to the background through the auxiliary switch inside the mechanism, but the opening and closing status of the non-mechanism phase cannot be judged. It is necessary to go to the scene to visually observe the opening and closing status. Increased labor costs, low efficiency, and the two identification methods belong to the same source, cannot accurately represent the correct opening and closing position of the switch body, and there are cases of misjudgment.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a three-phase linkage GIS switch opening and closing double confirmation structure, based on the three-phase linkage structure of the GIS isolating switch, a secondary phase body is added to the gear boxes of the intermediate phase and the side phase respectively The second confirmation structure led by the output shaft, the feedback opening and closing position monitoring signals are used as the second criterion, and the first criterion-mechanism phase auxiliary switch contact signal fed back by the first confirmation structure, forming non-homologous opening and closing The position indication constitutes a "double confirmation" structure for the opening and closing positions of the isolating switch. Only when all the criterion indications are consistent with the opening and closing operation instructions, can it be confirmed that the device has been operated in place, ensuring the accuracy of the opening and closing position of the isolating switch, avoiding misjudgment of the isolating switch position, and meeting the new requirements of the State Grid. While meeting the requirements of one-button sequential control, the operation efficiency and accuracy are improved; moreover, the double confirmation structure is simple in structure, wide in scope of application, low in manufacturing and maintenance costs, strong in anti-interference ability, and high in reliability and accuracy.

To achieve the above object, the present invention provides the following technical solutions:

A three-phase linkage GIS switch opening and closing double confirmation structure, the opening and closing actuator of the GIS isolating switch includes a drive unit and three gear transmission units connected thereto, the drive unit is arranged in the mechanism phase, The gear transmission unit is arranged in a gear box corresponding to three phases, connected with the moving contacts of corresponding phases, and includes a first confirmation structure and two second confirmation structures;

Wherein, the first confirmation structure is installed in the mechanism phase, connected with the output shaft of the drive motor in the drive unit, and used to detect the rotation angle of the output shaft of the drive motor to determine the opening and closing operation of the GIS isolating switch;

There are three second confirming structures, which are respectively installed in the gear boxes of a middle phase and two side phases, and are connected with the middle transmission shaft entering the gear box in the gear transmission unit and the output shaft of the phase body leaving the gear box. It is used to detect the rotation angle of the output shaft of the phase body to determine the opening and closing operation of the GIS isolating switch.

Further, the second confirmation structure includes a triangular bevel gear transmission mechanism, the three ends of the bevel gear transmission mechanism are respectively connected with the intermediate transmission shaft, the output shaft of the phase body and the detection rotation shaft, surrounding the periphery of the detection rotation shaft There are multiple travel switches, on which a stacked cam trigger is fixed, and the stacked cam trigger is contacted with different travel switches to determine the opening and closing operation of the GIS isolating switch.

Further, the bevel gear transmission mechanism includes a first bevel gear, a second bevel gear and a third bevel gear coaxially arranged on the intermediate transmission shaft, the first bevel gear and the second bevel gear are arranged oppositely and have the same structure, And both mesh with the fourth bevel gear,

The first bevel gear is fixedly arranged on the intermediate transmission shaft, the second bevel gear and the third bevel gear are fixedly connected together and rotatably arranged on the intermediate transmission shaft, and the fourth bevel gear is fixedly arranged on the output shaft of the phase body superior,

The outer diameter of the third bevel gear is larger than the first bevel gear and the second bevel gear, and meshes with the fifth bevel gear, and the fifth bevel gear is fixedly arranged on the detection rotating shaft,

The driving motor drives the intermediate transmission shaft to rotate, and the intermediate transmission shaft drives the first bevel gear, the fourth bevel gear of the output shaft of the phase body, the second bevel gear together with the third bevel gear and the fifth bevel gear to rotate, thereby driving the detection The rotating shaft rotates, and then drives the stacked cam trigger to rotate, so as to realize contact triggering with different travel switches.

Further, the second bevel gear and the third bevel gear are fixedly connected together through a connection key, and the two are rotatably arranged on the intermediate transmission shaft through a needle bearing.

Further, the stacked cam trigger part includes three cam-like parts coaxially arranged at intervals, which are sequentially recorded as the first type of cam parts, the second type of cam parts and the third type of cam parts, which are arranged in a staggered manner , each of which includes a toroidal body,

For the first type of cam piece and the second type of cam piece, an arc-shaped protrusion is provided on a part of the edge of the annular body,

For the third type of cam member, a square protrusion is provided on the edge of the annular body.

Further, the travel switch is provided with four travel switches, two travel switches form a group, and the two groups of travel switches are arranged at intervals, the first group of travel switches corresponds to the first type of cam member and the third type of cam member respectively, and the second group of travel switches The travel switch corresponds to the first type of cam member and the second type of cam member respectively.

Further, the inner ring of the annular body is in the shape of a hexagon, matching with the outer diameter of the detection rotating shaft.

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

1. The first confirmation structure selects the output shaft of the driving motor in the mechanism phase as the judgment basis, and judges the opening and closing operation of the GIS isolating switch according to its rotation angle; the second confirmation structure is installed in the gear box of the middle phase and the side phase, and selects The output shaft of the phase body is the judgment basis, and the opening and closing operation of the GIS isolating switch is also judged according to its rotation angle. The three second confirmation structures directly indicate the execution position of the end of the three-phase body opening and closing actuator respectively to ensure the opening and closing of the isolating switch. The accuracy of gate position;

At the same time, the first confirmation structure indicates that the transmission starting end of the three-phase linkage GIS isolation switch opening and closing instruction actuator is the output shaft of the drive motor, and the second confirmation structure indicates the transmission end of the three-phase linkage GIS isolation switch opening and closing instruction actuator. The output shaft of the phase body is closer to the moving contacts of each phase. They belong to heterogeneous indications. Only when all the criterion indications are consistent with the opening and closing operation instructions can it be confirmed that the device has been operated in place, which improves the efficiency and efficiency of the operation. accuracy.

2. The second confirmation structure adopts a triangular bevel gear transmission mechanism, which cleverly connects the intermediate transmission shaft, the output shaft of the phase body and the detection rotation shaft, and through the stacked cam trigger and stroke set on the detection rotation shaft The cooperation of the switch realizes the confirmation of the opening and closing operation of the GIS isolating switch. It has compact structure, simple transmission, wide application range, low manufacturing and maintenance costs, strong anti-interference ability and high reliability.

Description of drawings

Fig. 1 is the structure schematic diagram of double confirmation three-phase linkage of 252kV GIS isolating grounding switch of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of the first confirmation structure of the present invention;

Fig. 3 is a structural schematic diagram 1 of the second confirmation structure of the present invention;

Fig. 4 is a structural schematic diagram 1 of the second confirmation structure of the present invention;

5 is a schematic cross-sectional view of a second confirmation structure of the present invention;

Fig. 6 is a structural schematic diagram 1 of the stacked cam trigger of the present invention;

Fig. 7 is a structural schematic diagram II of the stacked cam trigger of the present invention;

In the figure: 1-screw, 2-gear transmission structure, 3-drive motor, 4-screw nut, 5-sector cam, 6-auxiliary switch, 7-intermediate drive shaft, 8-phase body output shaft, 9- Detection of rotating shaft, 10-travel switch, 11-stacked cam trigger, 1101-type cam, 1102-arc protrusion, 1103-square protrusion, 12-first bevel gear, 13-second bevel gear, 14 - the third bevel gear, 15 - the fourth bevel gear, 16 - the needle bearing, 17 - the fifth bevel gear, 18 - the mechanism phase, 19 - the gearbox.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the following embodiments will be specifically described in conjunction with the accompanying drawings to illustrate the present invention. But it does not constitute a limitation to the present invention.

It should be noted that, in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, and therefore should not be construed as limiting the present invention; the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance, and unless otherwise Clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a Electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. When two elements are "fixedly connected" or "rotatably connected", the two elements may be directly connected or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The fixed or fixed connection can be screwed or welded or riveted or plugged or connected by a third component. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The present invention provides a double-confirmation structure for opening and closing of a three-phase linkage GIS switch. As shown in Figure 1, the opening and closing actuator of the GIS isolating switch includes a drive unit and three gear transmission units connected thereto. The drive unit is arranged in the mechanism phase 18, the gear transmission unit is arranged in the gear box 19 corresponding to the three phases, connected with the moving contact of the corresponding phase, and includes a first confirmation structure and two second confirmation structures; wherein, the first A confirmation structure is installed in the mechanism phase 18, connected with the output shaft of the drive motor in the drive unit, and used to detect the rotation angle of the output shaft of the drive motor to determine the opening and closing operation of the GIS isolating switch; the second confirmation structure is provided with three, They are respectively installed in the gear boxes 19 of one middle phase and two side phases, and are connected with the middle transmission shaft entering the gear box 19 and the output shaft of the phase body leaving the gear 18 in the gear transmission unit, and are used to detect the rotation of the output shaft of the phase body The angle determines the opening and closing operation of the GIS isolating switch. details as follows:

As shown in Figure 2, the first confirmation structure includes a screw rod 1 arranged in parallel, one end of which is connected to the output shaft of the drive motor 3 of the opening and closing mechanism of the isolating switch/grounding switch through a gear transmission structure 2 respectively, and A screw nut 4 is provided, a fan-shaped cam 5 is arranged between two screw rods 1, and two auxiliary switches 6 are respectively arranged on each side, and the two auxiliary switches 6 are arranged at intervals, so that the driving motor drives the screw rod through gear transmission. Rotate, so as to drive the screw nut to move up and down along the screw, and then the screw nut pushes one side of the fan-shaped cam to rotate to the other side, and touches the corresponding auxiliary switch to trigger, so as to output the corresponding opening and closing signal, which is the first Judgment signal for secondary opening and closing.

As shown in Figures 3-5, the second confirmation structure includes a triangular bevel gear transmission mechanism. The three ends of the bevel gear transmission mechanism are respectively connected with the intermediate transmission shaft 7, the output shaft 8 of the phase body and the detection rotation shaft 9. A plurality of travel switches 10 are arranged around the detection rotating shaft 9, and a stacked cam trigger 11 is fixedly arranged on it, and the stacked cam trigger 11 is triggered by contact with different travel switches to determine the opening and closing of the GIS isolating switch. operate. In this way, the drive motor drives the intermediate transmission shaft to rotate, and then drives the output shaft of the phase body and the detection rotating shaft to rotate in turn, and then drives the stacked cam trigger to rotate so as to contact with different travel switches, so as to determine the opening and closing operation of the GIS isolating switch .

Specifically, the bevel gear transmission mechanism includes a first bevel gear 12, a second bevel gear 13 and a third bevel gear 14 coaxially arranged on the intermediate transmission shaft, and the first bevel gear 12 and the second bevel gear 13 are oppositely arranged , the same structure, and both mesh with the fourth bevel gear 15, the first bevel gear 12 is fixedly arranged on the intermediate transmission shaft, and the two rotate synchronously, the second bevel gear 13 and the third bevel gear 14 are fixedly connected together and rotate Set on the intermediate transmission shaft 7, the two can be connected by screws or connecting keys, and the second bevel gear 13 and the third bevel gear 14 are rotatably connected to the intermediate transmission shaft 7 through the needle bearing 16. The bevel gear 15 is fixedly arranged on the output shaft 8 of the phase body, and the outer diameter of the third bevel gear 14 is larger than the first bevel gear 12 and the second bevel gear 13, and meshes with the fifth bevel gear 17, the fifth bevel gear 17 is fixedly arranged on the detection rotating shaft 9, like this, under the driving of the driving motor, the intermediate transmission shaft rotates, thereby driving the first bevel gear to rotate in turn, and the fourth bevel gear of the output shaft of the phase body meshing with it to rotate, and also The second bevel gear meshed with the fourth bevel gear rotates together with the third bevel gear, and then the third bevel gear drives the fifth bevel gear to rotate, thereby driving the detection rotating shaft to rotate, and then driving the stacked cam trigger to rotate, realizing the Different limit switch contact trigger.

In order to cooperate with the opening and closing operation confirmation of the isolating switch and the grounding switch in the GIS switch, as shown in Figure 6-7, the stacked cam trigger member 11 includes three cam-like members 1101 coaxially arranged at intervals, sequentially from top to bottom Denoted as the first type of cam, the second type of cam and the third type of cam, they are arranged alternately, and they all include a ring-shaped body. The inner ring of the ring-shaped cup can be hexagonal, which is consistent with the detection The outer diameter of the rotating shaft is matched to facilitate the realization of fixed connection,

For the first type of cam piece and the second type of cam piece, an arc-shaped protrusion 1102 is provided on the edge of the ring-shaped body, and the arc length can be determined according to the opening and closing stroke of the disconnector or the grounding switch. For the third type The cam member is provided with a square protrusion 1103 on the edge of the annular body;

The travel switch 12 is provided with four travel switches, two travel switches form a group, and the two groups of travel switches are arranged at intervals, and the distance between them can be determined according to the opening and closing strokes of the isolating switch or the grounding switch, respectively corresponding to the detection of the isolating switch and the Earthing switch, for example, the first group of travel switches is used to detect the isolating switch, corresponding to the first type of cam parts and the third type of cam parts, and the second group of travel switches is used to detect the grounding switch, corresponding to the first type of cam parts and the second type of cam parts respectively. Class cam parts.

The working principle of the second confirmation structure in the middle-phase and side-phase gearboxes is the same. Taking the middle-phase gearbox as an example, the feedback process of the opening and closing position monitoring signals is as follows:

When the isolating switch is closed, the driving motor rotates forward, and the output shaft of the mechanism phase drives the intermediate transmission shaft to rotate forward, and the kinetic energy generated by the driving motor is transmitted to the gear transmission mechanism in the gearbox, driving the output shaft of the phase body connected to it to rotate positively. Rotate in the opposite direction to drive the intermediate phase body to perform the closing action; at the same time, the forward rotation of the intermediate transmission shaft drives the first bevel gear to rotate forward in turn, and the fourth bevel gear of the output shaft of the phase body meshing with it rotates forward, and The second bevel gear meshed with the fourth bevel gear rotates forward together with the third bevel gear, and then the third bevel gear drives the fifth bevel gear to rotate forward, thereby driving the detection rotating shaft to rotate forward, and then driving the stacked cam to trigger The arc-shaped protrusion of the first type of cam on the part is triggered by contact with a travel switch of the first group of travel switches, and the closing signal is output;

Similarly, when the brake is opened, the driving motor is reversed, and the output shaft of the mechanism phase drives the intermediate transmission shaft to rotate in reverse, and the kinetic energy generated by the driving motor is transmitted to the gear transmission mechanism in the gearbox, driving the output shaft of the phase body connected to it. Reverse rotation drives the intermediate phase body to perform the opening action; at the same time, the forward rotation of the intermediate transmission shaft sequentially drives the first bevel gear to rotate in the reverse direction, and the fourth bevel gear of the output shaft of the phase body meshing with it rotates in the reverse direction. The second bevel gear meshing with the fourth bevel gear rotates in reverse with the third bevel gear, and then the third bevel gear drives the fifth bevel gear to rotate in reverse, thereby driving the detection rotating shaft to rotate in reverse, and then driving the stacked cam The square projection of the third type of cam on the trigger piece contacts with another travel switch of the first group of travel switches to trigger, and output the opening signal;

The judgment output process of the opening and closing signal of the earthing switch is similar to that of the isolating switch, except that the first type of cam and the second type of cam on the stacked cam trigger and the second group of travel switches cooperate with each other to contact and trigger, and output the corresponding Opening and closing signal;

The second confirmation structure is set in the gear box, and it directly uses the rotation angle of the output shaft of the phase body as the judgment basis to output the judgment signal for the second opening and closing; the first confirmation structure is set in the mechanism phase, and directly uses the output of the drive motor Shaft rotation angle is the basis for judgment, and the judgment signal for opening and closing for the first time is output; the two belong to heterogeneous judgments, and only when the feedback signals of the first confirmation structure and the second confirmation structure are consistent with the opening and closing operation instructions, the It shows that the opening and closing action positions of the three phases are correct, which ensures the accurate execution of the opening and closing actions of the isolating switch. Compared with judging the opening and closing positions of the isolating switch simply according to the auxiliary switch or position indicator, the double confirmation structure of the present invention improves Accuracy, to avoid misjudgment of the opening and closing of the isolating switch.

The above-mentioned implementation mode is a preferred case of the present invention, and is not used to limit the protection scope of the present invention. Various deformations or modifications that can be made by persons of ordinary skill in the art without creative work within the scope of the appended claims still belong to this patent. scope of protection.

Claims (7)

1. A double-confirmation structure for opening and closing of a three-phase linkage GIS switch, the opening and closing actuator of the GIS isolating switch includes a drive unit and three gear transmission units connected thereto, and the drive unit is arranged on the mechanism phase Among them, the gear transmission unit is arranged in a gear box corresponding to three phases, and is connected to the moving contact of the corresponding phase, and is characterized in that it includes a first confirmation structure and two second confirmation structures; Wherein, the first confirmation structure is installed in the mechanism phase, connected with the output shaft of the drive motor in the drive unit, and used to detect the rotation angle of the output shaft of the drive motor to determine the opening and closing operation of the GIS isolating switch; There are three second confirming structures, which are respectively installed in the gear boxes of a middle phase and two side phases, and are connected with the middle transmission shaft entering the gear box in the gear transmission unit and the output shaft of the phase body leaving the gear box. It is used to detect the rotation angle of the output shaft of the phase body to determine the opening and closing operation of the GIS isolating switch. 2. The opening and closing double confirmation structure of the three-phase linkage GIS switch according to claim 1, characterized in that: the second confirmation structure includes a triangular bevel gear transmission mechanism, and the three ends of the bevel gear transmission mechanism They are respectively connected with the intermediate transmission shaft, the output shaft of the phase body and the detection rotation shaft. A plurality of travel switches are arranged around the periphery of the detection rotation shaft, and a stacked cam trigger is fixedly arranged on it. Through the stack cam trigger and different The contact trigger of the travel switch to determine the opening and closing operation of the GIS isolating switch. 3. The opening and closing double confirmation structure of the three-phase linkage GIS switch according to claim 2, characterized in that: the bevel gear transmission mechanism includes a first bevel gear coaxially arranged on the intermediate transmission shaft, a second bevel gear and the third bevel gear, the first bevel gear and the second bevel gear are oppositely arranged, have the same structure, and both mesh with the fourth bevel gear, The first bevel gear is fixedly arranged on the intermediate transmission shaft, the second bevel gear and the third bevel gear are fixedly connected together and rotatably arranged on the intermediate transmission shaft, and the fourth bevel gear is fixedly arranged on the output shaft of the phase body superior, The outer diameter of the third bevel gear is larger than the first bevel gear and the second bevel gear, and meshes with the fifth bevel gear, and the fifth bevel gear is fixedly arranged on the detection rotating shaft, The driving motor drives the intermediate transmission shaft to rotate, and the intermediate transmission shaft drives the first bevel gear, the fourth bevel gear of the output shaft of the phase body, the second bevel gear together with the third bevel gear and the fifth bevel gear to rotate, thereby driving the detection The rotating shaft rotates, and then drives the stacked cam trigger to rotate, so as to realize contact triggering with different travel switches. 4. The opening and closing double-confirmation structure of the three-phase linkage GIS switch according to claim 3, characterized in that: the second bevel gear and the third bevel gear are fixedly connected together through a connection key, and the two are fixed by a needle roller. The bearing rotation is arranged on the intermediate transmission shaft. 5. The opening and closing double-confirmation structure of the three-phase linkage GIS switch according to claim 2, characterized in that: the stacked cam trigger member includes three cam-like members coaxially arranged at intervals, sequentially from top to bottom Recorded as the first type of cam, the second type of cam and the third type of cam, they are arranged in a staggered manner, and they all include a ring-shaped body, For the first type of cam piece and the second type of cam piece, an arc-shaped protrusion is provided on a part of the edge of the annular body, For the third type of cam member, a square protrusion is provided on the edge of the annular body. 6. The opening and closing double-confirmation structure of the three-phase linkage GIS switch according to claim 5, characterized in that: the travel switch is provided with four travel switches, two travel switches form a group, and the distance between the two groups of travel switches is It is set that the first group of travel switches corresponds to the first type of cam member and the third type of cam member respectively, and the second group of travel switches respectively corresponds to the first type of cam member and the second type of cam member. 7. The opening and closing double confirmation structure of the three-phase linkage GIS switch according to claim 5, characterized in that: the inner circle of the annular body is hexagonal, which matches the outer diameter of the detection rotating shaft.

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