Outdoor electric isolation knife switch

Abstract

The utility model belongs to the technical field of high-voltage switch disconnecting links, and particularly discloses an outdoor electric disconnecting link which comprises a motor, a transmission mechanism and a communication module, the motor is fixedly mounted in a case, an output shaft of the motor is connected with a speed reducer, the speed reducer is connected with a transmission shaft, a mounting frame is connected with a bearing seat through a bolt, and a rotating shaft is rotatably connected with the bearing seat. The transmission shaft is connected with the rotating shaft through a pin, a temperature sensor and an ampere meter are further arranged in the case, and the communication module is electrically connected with the plc. The opening and closing of the existing disconnecting link cannot be remotely controlled, and when the problems that the disconnecting link is heated in the operation process and two contacts are overheated and adhered, people cannot see the problems, and at the moment, a motor or a disconnecting link structure can be possibly damaged by forced opening of a motor; according to the utility model, the remote control of the isolation switch is realized through the communication module and the plc controller, the current and temperature of the motor are monitored through the ammeter and the temperature sensor, the switch is prevented from being damaged due to overheat adhesion of the contact, and the maintenance is timely carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to high -voltage switch knife -switch technical field, concretely relates to a kind of outdoor electric isolation knife switch. BACKGROUND

[0002] In power system, isolation knife switch is used as important electrical equipment, for isolating power supply when overhauling and maintaining, to ensure the safety of operating personnel.The traditional outdoor 35kv isolation knife switch usually adopts manual operation mode, this operation mode is not only inefficient, and in adverse weather conditions or need frequent operation, it brings great inconvenience and security risk to operating personnel.With the continuous improvement of power system automation and intelligent level, it is inevitable development trend to change outdoor 35kv isolation knife switch into electric isolation knife switch.

[0003] Patent CN113903618A discloses a kind of 10kV outdoor electric isolation knife switch, including base, movable contact, static contact, ground contact and electric operating mechanism, the electric operating mechanism includes motor, runner and insulation connecting rod, wherein ground contact, movable contact and static contact are sequentially arranged on base, movable contact is installed on base by insulation support piece, is connected runner by motor, runner connects insulation connecting rod, insulation connecting rod connects the tail of movable contact, and movable contact is fixed on the top of insulation support piece, so that the movable contact, the insulation connecting rod and the runner form lever structure, in turn, using lever principle, when the motor drives, the lever structure is driven, to realize the other end of the movable contact is thrown to closing position.This application has simple structure, not only can realize the opening and closing of knife switch, but also can realize grounding operation quickly when knife switch is separated, save time and effort, greatly reduce the operation risk of operating personnel.

[0004] The above-mentioned scheme cannot remotely control the opening and closing of the isolation knife switch, and when the knife switch overheats during operation, the two contacts are overheated and adhered, which cannot be seen by people, and at this time, the motor forcibly opens the switch, which may damage the motor or the structure of the knife switch. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of outdoor electric isolation knife switch to solve the problem of remote control of isolation knife switch.

[0006] In order to achieve the above object, the utility model provides a basic scheme: an outdoor electric isolation knife switch, including case, motor, transmission mechanism, mounting bracket and insulating porcelain piece, the insulating porcelain piece top is equipped with contact, the motor is fixedly installed in the case, the transmission mechanism includes transmission shaft, pivot and embrace and hold, the motor output shaft is connected with speed reducer, the speed reducer output shaft is fixedly connected with embrace and hold, embrace and hold are fixedly connected with transmission shaft, the insulating porcelain piece is fixedly connected with pivot, the mounting bracket is connected with bearing seat through bolt, pivot and bearing seat sleeve joint, transmission shaft and pivot are connected through the shaft coupling, the case is equipped with communication module, the communication module is electrically connected plc controller.

[0007] The utility model discloses a principle and beneficial effect lies in: communication module adopts wireless communication technology, realizes the data transmission between electric isolation knife switch and remote monitoring center, and communication protocol adopts standard electric power communication protocol to ensure the reliability and compatibility of data, and speed reducer has good reduction ratio and transmission precision, can convert the high -speed rotation of motor into the low -speed opening and closing movement of knife switch contact stably.

[0008] Scheme two, this is the preferred of basic scheme, the motor electric connection has ammeter, the motor outside is equipped with temperature sensor, the transmission shaft axle is equipped with speed sensor, the ammeter, temperature sensor and speed sensor all are electrically connected with communication module and plc controller. Through monitoring motor temperature and current, output shaft speed, through communication module, monitoring data are sent to remote monitoring center, if temperature increases, current increases, transmission shaft speed is low when motor starts, can judge that knife switch heats in the operation process, and contact overheating adhesion etc. Fault, and plc controller automatically cuts off motor power supply, thereby avoiding forcibly opening and closing damage knife switch and motor.

[0009] Scheme three, this is the preferred of basic scheme, the transmission mechanism still includes first connecting rod, the first connecting rod is connected with a plurality of second connecting rods through the pin, and the second connecting rods are fixedly connected with the insulating porcelain pieces respectively. Form a crank and rocker mechanism through the second connecting rod and the first connecting rod, and the rotation of the insulating porcelain pieces is directly driven by the first connecting rod through the transmission shaft, so that power is transmitted to other insulating porcelain pieces, so that the insulating porcelain pieces are synchronously rotated, and one motor drives multiple knife switches to operate synchronously.

[0010] Scheme four, this is the preferred of basic scheme, the speed reducer outside is equipped with manual locking switch, the manual locking switch is fixedly connected with the speed reducer gear through the speed reducer shell, the case is equipped with handle, the handle tail end is fixedly connected with the crank handle plug, and the crank handle plug is inserted with the manual locking switch. When the motor fails to stop, the crank handle plug is inserted into the manual locking switch, the transmission shaft is driven to rotate by directly rotating the speed reducer gear, and the manual opening and closing work is completed.

[0011] Scheme five, this is the preferred basis scheme, the upper surface of the cabinet is provided with a split and close indicator, the split and close indicator includes a first pointer and a second pointer, the transmission shaft penetrates the first pointer and the second pointer, the first pointer is fixedly connected with the cabinet, and the second pointer is fixedly connected with the transmission shaft. The two pointers of the indicator coincide, and the split and close state is closed. The split and close state of the isolation switch is quickly judged through the angle of the indicator pointer.

[0012] Scheme six, this is the preferred basis scheme, a limiting ring is sleeved on the output shaft of the speed reducer, a dynamic block is arranged on the limiting ring, a static block is fixedly connected on the speed reducer, and the static block is located outside the limiting ring. The limiting ring rotates with the output shaft of the speed reducer, and when the protrusion of the limiting ring contacts the static block, the rotation of the output shaft of the speed reducer is prevented, and mechanical limiting is completed. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an outdoor electric isolation switch of the utility model;

[0014] Figure 2 It is a front view of an outdoor electric isolation switch of the utility model;

[0015] Figure 3 It is Figure 2 It is a local enlarged view of A in figure

[0016] Figure 4 It is a structural schematic diagram of a handle of an outdoor electric isolation switch of the utility model. DETAILED DESCRIPTION

[0017] The utility model will be further explained in detail by specific implementation ways:

[0018] The reference signs in the drawings of the specification include: 1-cabinet, 2-transmission mechanism, 3-mounting frame, 4-insulating porcelain piece, 5-transmission shaft, 6-clamp, 7-rotating shaft, 8-contact, 9-motor, 10-speed reducer, 11-bearing seat, 12-communication module, 13-plc controller, 14-current meter, 15-speed sensor, 16-temperature sensor, 17-first connecting rod, 18-second connecting rod, 19-manual locking switch, 20-handle, 21-split and close indicator, 22-limiting ring, 23-static block, 24-dynamic block, 25-second pointer, 26-first pointer.

[0019] EMBODIMENT

[0020] As Figures 1 to 4The outdoor electric isolation knife switch is shown, including motor 9, transmission mechanism 2, mounting frame 3 and insulating porcelain piece 4, the top of insulating porcelain piece 4 is equipped with contact 8, motor 9 is fixedly installed in the machine box 1, transmission mechanism 2 includes transmission shaft 5, rotating shaft 7 and embrace clamp 6, the output shaft of motor 9 is connected with speed reducer 10, the output shaft sleeve of speed reducer 10 is connected with limit ring 22, limit ring 22 is equipped with dynamic stopper 24, speed reducer 10 is equipped with static stopper 23, static stopper 23 is located in the rotation radius of dynamic stopper 24, the output shaft of speed reducer 10 penetrates machine box 1, the output shaft of speed reducer 10 is sleeved with on-off indicator 21 on the top of machine box 1, on-off indicator 21 includes first pointer 26 and second pointer 25, transmission shaft 5 penetrates first pointer 26 and second pointer 25, first pointer 26 and the upper surface of machine box 1 are fixedly connected, second pointer 25 and transmission shaft 5 are fixedly connected, the end of the output shaft of speed reducer 10 is connected with embrace clamp 6 through bolt, embrace clamp 6 and transmission shaft 5 are fixedly connected, transmission shaft 5 is connected with rotating shaft 7 through coupling, insulating porcelain piece 4 is fixed on mounting frame 3 through bolt, rotating shaft 7 and insulating porcelain piece 4 are fixedly connected, bearing seat 11 is fixed on mounting frame 3 through bolt, rotating shaft 7 and bearing seat 11 are rotatably connected, second connecting rod 18 is installed on insulating porcelain piece 4 through bolt, second connecting rod 18 is connected with first connecting rod 17 through pin, the both ends of first connecting rod 17 are connected with the second connecting rod 18 of other insulating porcelain piece 4 through pin; Manual locking switch 19 is arranged on speed reducer 10, manual locking switch 19 penetrates the shell of speed reducer 10 and is connected with the gear of speed reducer 10, handle 20 is arranged in machine box 1, handle 20 is fixedly connected with crank plug 27, crank plug 27 and manual locking switch 19 are inserted; Machine box 1 has communication module 12, communication module 12 is electrically connected with plc controller 13, plc controller 13 is electrically connected with motor 9, temperature sensor 16 is arranged on the outside of motor 9, temperature sensor 16 adopts WG22701, ammeter 14 is arranged at the front end of motor 9, ammeter 14 adopts PZ568I series ammeter, speed sensor 15 is arranged at the top of machine box 1, speed sensor 15 adopts JK6702 sensor, speed sensor 15 is opposite to transmission shaft 5, temperature sensor 16, ammeter 14 and speed sensor 15 are electrically connected with communication module 12.

[0021] The implementation of the embodiment is that when the isolation switch needs to be opened, the operator sends an opening instruction from the remote monitoring center, the instruction is transmitted to the PLC controller 13 through the communication module 12 to start the motor 9, the communication module 12 adopts 4G wireless communication technology, data transmission between the electric isolation switch and the remote monitoring center is realized, the communication protocol adopts the power communication protocol of IEC 60870-5-101 standard to ensure the reliability and compatibility of data; after the PLC control motor 9 is started, the motor 9 delivers power to the speed reducer 10, the limit ring 22 rotates with the output shaft of the speed reducer 10, the movable stop block rotates with the limit ring 22, when the movable stop block abuts against the static stop block 23, the output shaft of the speed reducer 10 stops rotating, at the same time, the first pointer 26 and the second pointer 25 of the opening and closing indicator 21 are separated from the coincident state, the output shaft of the speed reducer 10 delivers power to the transmission shaft 5 through the clamping 6, the transmission shaft 5 drives the rotating shaft 7 to rotate, the insulating porcelain piece 4 rotates synchronously with the rotating shaft 7, the insulating porcelain piece 4 drives the second connecting rod 18 to rotate, the second connecting rod 18 drives the first connecting rod 17 to reciprocate, the first connecting rod 17 drives a plurality of second connecting rods 18 connected thereto to rotate synchronously, so that the contact 8 is separated.

[0022] When a fault occurs during the opening process, the speed sensor 15, the temperature sensor 16 and the ammeter 14 monitor abnormal data input into the PLC controller 13, the PLC controller 13 disconnects the power supply of the motor 9 to prevent the isolation switch or the motor 9 from being damaged by forced opening, and sends the data to the remote control center through the communication module 12.

[0023] When the on-site personnel need to manually operate, the handle 20 in the cabinet 1 can be removed after the power supply of the motor 9 is disconnected, the manual locking switch 19 is inserted, the transmission shaft 5 is driven by rotating the gear of the speed reducer 10, and the opening operation is performed.

[0024] When the switch is closed, the implementation process is consistent with the above.

[0025] The above is only an embodiment of the utility model, and the well-known specific structure and characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the structure of the utility model, a number of modifications and improvements can be made, which should also be considered as the protection range of the utility model, and these will not affect the effect and practicality of the utility model. The protection range claimed in the application should be subject to the content of the claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. An outdoor electric isolation draw-out disconnecting switch, characterized in that, The utility model relates to a kind of electric switch, including cabinet (1), motor (9), transmission mechanism (2), mounting frame (3) and insulating porcelain piece (4), the insulating porcelain piece (4) top is equipped with contact (8), the motor (9) is fixedly installed in cabinet (1), the transmission mechanism (2) includes transmission shaft (5), rotating shaft (7) and embrace clamp (6), the motor (9) output shaft is connected with speed reducer (10), the speed reducer (10) output shaft is fixedly connected with embrace clamp (6), the embrace clamp (6) is fixedly connected with transmission shaft (5), the insulating porcelain piece (4) is fixedly connected with rotating shaft (7), bearing seat (11) is connected on the mounting frame (3) by bolt, the rotating shaft (7) is sleeved with bearing seat (11), the transmission shaft (5) is connected with rotating shaft (7) by shaft coupling, communication module (12) is equipped in the cabinet (1), the communication module (12) is electrically connected plc controller (13).

2. An outdoor electric isolating draw-out switch according to claim 1, characterized in that , the motor (9) is electrically connected with ammeter (14), temperature sensor (16) is equipped on the outside of the motor (9), speed sensor (15) is equipped on the transmission shaft (5), the ammeter (14), temperature sensor (16) and speed sensor (15) are electrically connected plc controller (13) and communication module (12).

3. An outdoor electric isolating draw-out switch according to claim 1, characterized in that , the transmission mechanism (2) further includes first connecting rod (17), the first connecting rod (17) is connected with a plurality of second connecting rods (18) by pin, the second connecting rod (18) is fixedly connected with insulating porcelain piece (4) respectively.

4. An outdoor electric isolating draw-out switch according to claim 1, characterized in that, Manual locking switch (19) is equipped on the outside of the speed reducer (10), the manual locking switch (19) is fixedly connected with speed reducer (10) gear by penetrating the shell of speed reducer (10), handle (20) is equipped in the cabinet (1), the handle (20) tail end is fixedly connected with crank handle plug (27), the crank handle plug (27) is inserted with manual locking switch (19).

5. An outdoor electric isolating draw-out switch according to claim 1, characterized in that, The upper surface of the cabinet (1) is equipped with on-off indicator (21), the on-off indicator (21) includes first pointer (26) and second pointer (25), the transmission shaft (5) penetrates first pointer (26) and second pointer (25), the first pointer (26) is fixedly connected with cabinet (1), the second pointer (25) is fixedly connected with transmission shaft (5).

6. An outdoor electric isolating draw-out switch according to claim 1, characterized in that Limiting ring (22) is sleeved on the output shaft of the speed reducer (10), dynamic stopper (24) is equipped on the limiting ring (22), static stopper (23) is fixedly connected on the speed reducer (10), the static stopper (23) is located on the outside of limiting ring (22).

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