Double confirmation structure for opening and closing of a three-phase interlocking GIS disconnector

Abstract

The present invention provides a closing and opening double confirmation structure for a three-phase linkage GIS switch. The closing and opening actuator of the GIS disconnector includes a driving unit and three gear transmission units connected thereto. The driving unit is arranged in the mechanism phase, and the gear transmission units are arranged in the gearboxes corresponding to the three phases and are connected to the moving contacts of the corresponding phases, and include a first confirmation structure and two second confirmation structures. Among them, the first confirmation structure is installed in the mechanism phase and is connected to the output shaft of the driving motor in the driving unit, and is used to detect the rotation angle of the output shaft of the driving motor to determine the closing and opening operations of the GIS disconnector. There are three second confirmation structures, which are respectively installed in the gearboxes of one intermediate phase and two edge phases, and are connected to the intermediate transmission shaft entering the gearbox and the phase body output shaft leaving the gearbox in the gear transmission unit, and are used to detect the rotation angle of the phase body output shaft to determine the closing and opening operations of the GIS disconnector.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage electrical equipment, and particularly relates to a double-confirmation structure for opening and closing a three-phase interlocking GIS disconnector. Background Art

[0002] At present, the three-phase interlocking structure of the 252kV GIS three-position isolating and grounding switch is that the mechanism converts the electrical signal into mechanical energy, and transmits it to the body of the three-position isolating and grounding switch through the output shaft of the mechanism, driving the opening and closing actions. The electrical signal of its opening and closing position is fed back through the auxiliary switch inside the mechanism, which cannot meet the requirement of "one-key sequence control" double confirmation, that is, there should be at least two non-same principle or non-homologous indicators to indicate the position change of the disconnector.

[0003] At present, when the three-phase interlocking disconnector structure of GIS is opened and closed, the secondary signal is fed back to the background through the auxiliary switch inside the mechanism. However, the opening and closing states of the non-mechanism phases cannot be judged, and it is necessary to go to the site to visually observe its opening and closing states, which increases the labor cost and is inefficient. Moreover, these two judgment methods are homologous and cannot accurately represent the correct opening and closing positions of the switch body, resulting in misjudgment. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the invention provides a double-confirmation structure for opening and closing a three-phase interlocking GIS disconnector. Based on the three-phase interlocking structure of the GIS disconnector, a second confirmation structure led out from the output shaft of the slave phase body is respectively added in the gearboxes of the middle phase and the side phase, and the monitoring signals of the opening and closing positions are fed back as the second criterion, forming a non-homologous opening and closing position indication with the first criterion - the contact signal of the auxiliary switch of the mechanism phase fed back by the first confirmation structure, constituting the "double-confirmation" structure of the opening and closing positions of the disconnector. Only when all criterion indications are consistent with the opening and closing operation instructions, can it be confirmed that the equipment has been operated in place, ensuring the accuracy of the opening and closing positions of the disconnector, avoiding misjudgment of the disconnector position, improving the operation efficiency and accuracy while meeting the requirements of the new one-key sequence control of the State Grid; moreover, the double-confirmation structure is simple in structure, wide in application range, low in manufacturing and maintenance costs, strong in anti-interference ability, and high in reliability and accuracy.

[0005] To achieve the above object, the invention provides the following technical solutions:

[0006] A double-confirmation structure for opening and closing a three-phase interlocking GIS disconnector, the opening and closing actuator of the GIS disconnector includes a driving unit and three gear transmission units connected thereto, the driving unit is arranged in the mechanism phase, the gear transmission units are arranged in the gearboxes corresponding to the three phases, and are connected to the moving contacts of the corresponding phases, and include a first confirmation structure and two second confirmation structures;

[0007] Among them, the first confirmation structure is installed in the mechanism phase and is connected to the output shaft of the driving motor in the driving unit, and is used to detect the rotation angle of the output shaft of the driving motor to determine the opening and closing operations of the GIS disconnector;

[0008] There are three second confirmation structures, which are respectively installed in the gearboxes of an intermediate phase and two side phases, and are connected to the intermediate transmission shaft entering the gearbox and the phase body output shaft leaving the gearbox in the gear transmission unit, and are used to detect the rotation angle of the phase body output shaft to determine the opening and closing operations of the GIS disconnector.

[0009] Furthermore, the second confirmation structure includes a triangular bevel gear transmission mechanism. The three ends of the bevel gear transmission mechanism are respectively connected to the intermediate transmission shaft, the phase body output shaft 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 thereon. By contacting different travel switches through the stacked cam trigger, the opening and closing operations of the GIS disconnector are determined.

[0010] Furthermore, 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 oppositely arranged and have the same structure, and both are meshed with a fourth bevel gear.

[0011] 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. The fourth bevel gear is fixedly arranged on the phase body output shaft.

[0012] The outer diameter of the third bevel gear is larger than that of the first bevel gear and the second bevel gear, and it is meshed with a fifth bevel gear. The fifth bevel gear is fixedly arranged on the detection rotation shaft.

[0013] 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 phase body output shaft, the second bevel gear together with the third bevel gear, and the fifth bevel gear to rotate in sequence, thereby driving the detection rotation shaft to rotate, and further driving the stacked cam trigger to rotate, so as to realize contacting and triggering different travel switches.

[0014] Furthermore, the second bevel gear and the third bevel gear are fixedly connected together by a connection key and are rotatably arranged on the intermediate transmission shaft through a needle roller bearing.

[0015] Furthermore, the stacked cam trigger includes three cam-like parts coaxially arranged at intervals. They are sequentially recorded as the first cam-like part, the second cam-like part and the third cam-like part from top to bottom. They are staggered, and each of them includes an annular body. [[ID=2,6]]

[0016] For the first type of cam member and the second type of cam member, arc-shaped protrusions are provided on a partial edge of the annular body.

[0017] For the third type of cam member, square protrusions are provided on the edge of the annular body.

[0018] Furthermore, 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 respectively correspond to the first type of cam member and the third type of cam member, and the second group of travel switches respectively correspond to the first type of cam member and the second type of cam member.

[0019] Furthermore, the inner ring of the annular body is hexagonal and is matched with the outer diameter of the detection rotating shaft.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 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 operations of the GIS disconnector according to its rotation angle; the second confirmation structure is installed in the gearboxes of the middle phase and the side phase, selects the output shaft of the phase body as the judgment basis, and also judges the opening and closing operations of the GIS disconnector according to its rotation angle. The three second confirmation structures respectively directly indicate the execution positions at the ends of the opening and closing actuators of the three-phase body, ensuring the accuracy of the opening and closing positions of the disconnector.

[0022] At the same time, the first confirmation structure indicates the transmission starting end of the opening and closing command actuator of the three-phase linkage GIS disconnector, that is, the output shaft of the driving motor, while the second confirmation structure indicates the transmission end of the opening and closing command actuator of the three-phase linkage GIS disconnector, that is, the output shaft of the phase body, which is closer to the moving contacts of each phase. They belong to heterologous indication. Only when all the judgment criteria indications are consistent with the opening and closing operation instructions can it be confirmed that the equipment has been operated in place, improving the operation efficiency and accuracy.

[0023] 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 rotating shaft together, and realizes the confirmation of the opening and closing operations of the GIS disconnector through the cooperation of the stacked cam trigger member arranged on the detection rotating shaft and the travel switch. Its structure is compact, the transmission is simple, the applicable range is wide, the manufacturing and maintenance costs are low, the anti-interference ability is strong, and the reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the double-confirmation three-phase linkage of the 252 kV GIS isolating earthing switch of the present invention;

[0025] Figure 2 It is a schematic cross-sectional structure diagram of the first confirmation structure of the present invention;

[0026] Figure 3 Structural schematic of the second confirmation structure of the present invention Figure 1 ;

[0027] Figure 4 Structural schematic of the second confirmation structure of the present invention Figure 1 ;

[0028] Figure 5 Cross-sectional schematic of the second confirmation structure of the present invention;

[0029] Figure 6 Structural schematic of the stacked cam trigger of the present invention Figure 1 ;

[0030] Figure 7 Structural schematic of the stacked cam trigger of the present invention Figure 2 ;

[0031] In the figure: 1 - lead screw, 2 - gear transmission structure, 3 - drive motor, 4 - lead screw nut, 5 - sector cam, 6 - auxiliary switch, 7 - intermediate transmission shaft, 8 - phase body output shaft, 9 - detection rotation shaft, 10 - travel switch, 11 - stacked cam trigger, 1101 - cam-like member, 1102 - arc-shaped protrusion, 1103 - square protrusion, 12 - first bevel gear, 13 - second bevel gear, 14 - third bevel gear, 15 - fourth bevel gear, 16 - needle roller bearing, 17 - fifth bevel gear, 18 - mechanism phase, 19 - gear box. Detailed implementation manners

[0032] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the following embodiments are described in detail with reference to the accompanying drawings. It should be noted that the descriptions of these embodiments are for helping to understand the present invention, but do not constitute a limitation to the present invention.

[0033] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "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 an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. When two elements are "fixedly connected" or "rotationally connected", the two elements can be directly connected or there can also be an intermediate element. On the contrary, when an element is called "directly on" another element, there is no intermediate element. The fixed connection or fixed connection method can be screwed connection, welded connection, riveted connection, inserted connection or connected through a third component. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention.

[0035] The present invention provides a double-confirmation structure for opening and closing a three-phase interlocking GIS disconnector, as Figure 1 shown. The opening and closing actuator of this GIS disconnector includes a driving unit and three gear transmission units connected thereto. The driving unit is arranged in the mechanism phase 18, and the gear transmission unit is arranged in the gearboxes 19 corresponding to the three phases and is connected to the moving contacts of the corresponding phases. It includes a first confirmation structure and two second confirmation structures; wherein, the first confirmation structure is installed in the mechanism phase 18 and is connected to the output shaft of the driving motor in the driving unit, and is used to detect the rotation angle of the output shaft of the driving motor to determine the opening and closing operation of the GIS disconnector; there are three second confirmation structures, which are respectively installed in the gearboxes 19 of one intermediate phase and two edge phases, and are connected to the intermediate transmission shaft entering the gearbox 19 and the phase body output shaft leaving the gear 18 in the gear transmission unit, and are used to detect the rotation angle of the phase body output shaft to determine the opening and closing operation of the GIS disconnector. Specifically as follows:

[0036] As Figure 2As shown in the figure, the first confirmation structure includes a lead screw 1 arranged in parallel. One end of the lead screw is respectively connected to the output shaft of a driving motor 3 of the opening and closing mechanism of the disconnector / earthing switch through a gear transmission structure 2. A lead screw nut 4 is also arranged thereon. A sector cam 5 is arranged between the two lead screws 1. Two auxiliary switches 6 are arranged on each side, and the two auxiliary switches 6 are arranged at intervals. In this way, the driving motor drives the lead screw to rotate through the gear transmission, thereby driving the lead screw nut to move up and down along the lead screw. Then, the lead screw nut pushes one side of the sector cam to rotate to the other side, contacts and triggers the corresponding auxiliary switch, so as to output the corresponding opening and closing signal, which is the determination signal for the first opening and closing.

[0037] As Figures 3 - 5 shown in the figure, the second confirmation structure includes a triangular bevel gear transmission mechanism. Three ends of the bevel gear transmission mechanism are respectively connected to an intermediate transmission shaft 7, a phase body output shaft 8 and a detection rotation shaft 9. A plurality of travel switches 10 are arranged around the periphery of the detection rotation shaft 9. A stacked cam trigger 11 is fixedly arranged thereon. By contacting and triggering different travel switches through the stacked cam trigger 11, the opening and closing operations of the GIS disconnector are determined. In this way, the driving motor drives the intermediate transmission shaft to rotate, and then drives the phase body output shaft and the detection rotation shaft to rotate in sequence, and further drives the stacked cam trigger to rotate, so as to contact different travel switches, thereby determining the opening and closing operations of the GIS disconnector.

[0038] 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. The first bevel gear 12 and the second bevel gear 13 are arranged oppositely and have the same structure, and both are meshed with a 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 rotatably arranged on the intermediate transmission shaft 7, and the two can be connected together by screws or connection keys, etc. The second bevel gear 13 and the third bevel gear 14 are rotatably connected to the intermediate transmission shaft 7 through a needle bearing 16. The fourth bevel gear 15 is fixedly arranged on the phase body output shaft 8. At the same time, the outer diameter of the third bevel gear 14 is larger than that of the first bevel gear 12 and the second bevel gear 13, and it is meshed with a fifth bevel gear 17. The fifth bevel gear 17 is fixedly arranged on the detection rotation shaft 9. In this way, driven by the driving motor, the intermediate transmission shaft rotates, thereby driving the first bevel gear to rotate in sequence, the fourth bevel gear on the phase body output shaft meshed therewith to rotate, and the second bevel gear together with the third bevel gear meshed with the fourth bevel gear to rotate, and then the third bevel gear drives the fifth bevel gear to rotate, so as to drive the detection rotation shaft to rotate, and further drive the stacked cam trigger to rotate, realizing contact triggering with different travel switches.

[0039] In order to cooperate with the confirmation of the opening and closing operations of the disconnector and the earthing switch in the GIS disconnector, asFigures 6 - 7 As shown, the stacked cam trigger 11 includes three cam-like members 1101 arranged coaxially and spaced apart. They are sequentially denoted as the first cam-like member, the second cam-like member, and the third cam-like member from top to bottom. They are staggered. Each of them includes an annular body. The inner circle of the annular cup can be hexagonal and is matched with the outer diameter of the detection rotating shaft to facilitate fixed connection.

[0040] For the first cam-like member and the second cam-like member, arc-shaped protrusions 1102 are provided on a part of the edge of the annular body. The arc length can be determined according to the opening and closing stroke of the disconnector or the earthing switch. For the third cam-like member, square protrusions 1103 are provided on the edge of the annular body.

[0041] The travel switch 12 is provided with four travel switches. Two travel switches form a group. The two groups of travel switches are spaced apart. The spacing distance can be determined according to the opening and closing stroke of the disconnector or the earthing switch. They respectively correspond to detecting the disconnector and the earthing switch. For example, the first group of travel switches is used to detect the disconnector and respectively corresponds to the first cam-like member and the third cam-like member. The second group of travel switches is used to detect the earthing switch and respectively corresponds to the first cam-like member and the second cam-like member.

[0042] The working principle of the second confirmation structure in the intermediate phase and the edge phase gearboxes is the same. Taking the intermediate phase gearbox as an example, the feedback process of the opening and closing position monitoring signals is as follows:

[0043] When the disconnector is closed, the driving motor rotates forward. The output shaft of the mechanism phase drives the intermediate transmission shaft to rotate forward, transmits the kinetic energy generated by the driving motor to the gear transmission mechanism in the gearbox, drives the phase body output shaft connected thereto to rotate forward, and drives the intermediate phase body to perform the closing action. At the same time, the forward rotation of the intermediate transmission shaft sequentially drives the first bevel gear to rotate forward, the fourth bevel gear of the phase body output shaft engaged therewith to rotate forward, and the second bevel gear engaged with the fourth bevel gear together with the third bevel gear to rotate forward, and then the third bevel gear drives the fifth bevel gear to rotate forward, thereby driving the detection rotating shaft to rotate forward, and further driving the arc-shaped protrusion of the first cam-like member on the stacked cam trigger to contact and trigger one of the travel switches of the first group of travel switches, and outputting a closing signal.

[0044] Similarly, when the switch is opened, the driving motor rotates in reverse. The output shaft of the mechanism phase drives the intermediate transmission shaft to rotate in the reverse direction, transferring the kinetic energy generated by the driving motor to the gear transmission mechanism in the gearbox, driving the output shaft of the phase body connected thereto to rotate in the reverse direction, and driving the intermediate phase body to perform the opening action. At the same time, the forward rotation of the intermediate transmission shaft drives the first bevel gear to rotate in reverse in sequence, the fourth bevel gear of the output shaft of the phase body meshing with it rotates in reverse, and the second bevel gear meshing with the fourth bevel gear rotates in reverse together with the third bevel gear. 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 further driving the square protrusion of the third type of cam member on the stacked cam trigger member to contact and trigger another travel switch of the first group of travel switches, outputting an opening signal.

[0045] The determination and output process of the opening and closing signals of the earthing switch is similar to that of the disconnector, except that the first type of cam member, the second type of cam member on the stacked cam trigger member and the second group of travel switches cooperate with each other to contact and trigger, outputting the corresponding opening and closing signals.

[0046] The second confirmation structure is arranged in the gearbox and directly uses the rotation angle of the output shaft of the phase body as the determination basis to output the determination signal for the second opening and closing. The first confirmation structure is arranged in the mechanism phase and directly uses the rotation angle of the output shaft of the driving motor as the determination basis to output the determination signal for the first opening and closing. The two belong to heterologous determination. Only when the feedback signals of the first confirmation structure and the second confirmation structure are both consistent with the opening and closing operation instructions, does it indicate that the opening and closing action positions of the three phases are all correct, ensuring the accurate execution of the opening and closing actions of the disconnector. Compared with simply judging the opening and closing positions of the disconnector according to the auxiliary switch or the position indicator, the dual confirmation structure of the present invention improves the accuracy and avoids misjudgment of the opening and closing of the disconnector.

[0047] The above embodiments are preferred cases of the present invention and are not used to limit the protection scope of the present invention. Various deformations or modifications that can be made by those of ordinary skill in the art without creative labor within the scope of the appended claims still fall within the protection scope of this patent.

Claims

1. A double confirmation structure for opening and closing a three-phase interlocking GIS disconnector. The opening and closing actuator of the GIS disconnector includes a driving unit and three gear transmission units connected thereto. The driving unit is arranged in the mechanism phase, and the gear transmission units are arranged in the gear boxes corresponding to the three phases and are connected to the moving contacts of the corresponding phases. It is characterized in that: It includes a first confirmation structure and two second confirmation structures; Among them, the first confirmation structure is installed in the mechanism phase and is connected to the output shaft of the driving motor in the driving unit, and is used to detect the rotation angle of the output shaft of the driving motor to determine the opening and closing operations of the GIS disconnector; There are three second confirmation structures, which are respectively installed in the gearboxes of an intermediate phase and two side phases, and are connected to the intermediate transmission shaft entering the gearbox and the phase body output shaft leaving the gearbox in the gear transmission unit, and are used to detect the rotation angle of the phase body output shaft to determine the opening and closing operations of the GIS disconnector; The second confirmation structure includes a triangular bevel gear transmission mechanism. The three ends of the bevel gear transmission mechanism are respectively connected to the intermediate transmission shaft, the phase body output shaft 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 thereon. By contacting different travel switches through the stacked cam trigger, the opening and closing operations of the GIS disconnector are determined; 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 oppositely arranged and have the same structure, and both are meshed with a 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. The fourth bevel gear is fixedly arranged on the phase body output shaft. The outer diameter of the third bevel gear is larger than that of the first bevel gear and the second bevel gear, and it is meshed with a fifth bevel gear. The fifth bevel gear is fixedly arranged on the detection rotation 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 phase body output shaft, the second bevel gear together with the third bevel gear, and the fifth bevel gear to rotate in sequence, so as to drive the detection rotation shaft to rotate, and further drive the stacked cam trigger to rotate, realizing contact triggering with different travel switches; The stacked cam trigger includes three cam-like parts coaxially arranged at intervals. They are sequentially recorded as the first cam-like part, the second cam-like part and the third cam-like part from top to bottom. They are staggered, and each of them includes an annular body. For the first cam-like part and the second cam-like part, arc-shaped protrusions are arranged on a part of the edge of the annular body. For the third cam-like part, a square protrusion is arranged on the edge of the annular body.

2. The closing and opening double-confirmation structure of the three-phase linkage GIS disconnector according to claim 1, characterized in that: The second bevel gear and the third bevel gear are fixedly connected together by a connecting key and are rotatably arranged on the intermediate transmission shaft through a needle bearing.

3. The double confirmation structure for opening and closing of the three-phase interlocking GIS disconnector according to claim 1, characterized in that: There are four travel switches. Two travel switches are in a group. The two groups of travel switches are arranged at intervals. The first group of travel switches respectively correspond to the first cam-like part and the third cam-like part, and the second group of travel switches respectively correspond to the first cam-like part and the second cam-like part.

4. The opening and closing double confirmation structure of the three-phase linkage GIS disconnector according to claim 1, characterized in that: The inner ring of the annular body is hexagonal and is matched with the outer diameter of the detection rotation shaft.

Images