CN110473733A - A kind of earthing switch electric operating driving mechanism - Google Patents

Abstract

The invention discloses an electric operation driving mechanism of a grounding switch, which can be installed in a high-voltage switch cabinet. The rear end of the driving shaft of the driving mechanism stretches out from the frame and is equipped with a crank arm, and the crank arm is connected with the large shaft for operating the grounding switch through a link mechanism. The drive shaft and the drive gear are connected through an electromagnetic clutch. When the electromagnetic clutch is electrified, the drive shaft rotates with the drive gear. When the electromagnetic clutch is de-energized, the connection between the drive shaft and the drive gear is disconnected; the drive shaft of the drive mechanism The front end extends out of the frame and is fixedly installed with two cams. When the two cams rotate with the drive shaft, the contact finger roller of the corresponding micro switch is pressed to change the opening and closing state, and the electric operation control device monitors the state change of the corresponding micro switch. After that, the motor can be controlled to stop rotating and cut off the power supply of the electromagnetic clutch. The driving mechanism enables the original grounding switch to realize the electric operation function without any modification, and the switching between manual operation and electric operation is convenient and reliable.

Description

A driving mechanism for electric operation of an earthing switch

technical field

The invention relates to electric equipment, in particular to a grounding switch electric operation drive mechanism related to the grounding switch in a high-voltage switch cabinet.

Background technique

The grounding switch in the high-voltage switchgear is a mechanical grounding device used for grounding to ensure personal safety during maintenance. When overhauling electrical equipment, the grounding switch (or the grounding wire) must be closed for all directions that may send power to the power-off equipment or the lines that may generate induced voltages from the power-off equipment. (or power outage working point) a sudden call during work is a reliable safety measure to ensure the personal safety of maintenance personnel. At the same time, the residual charge on the electrical equipment disconnected by the switch cabinet can also be released by closing the grounding switch.

The split-type grounding switch used in the high-voltage switch cabinet installs the static contact directly in the cabinet. After the moving contact and related components are assembled, it is installed separately from the static contact. This kind of grounding switch has a simple structure, takes up little space and costs Low. However, because the driving components such as the motor cannot be installed on the grounding switch body, electric operation cannot be realized at present.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a simple in structure, convenient and practical earthing switch electric operation driving mechanism, which can also complete the electric operation of the earthing switch without making any changes to the original earthing switch , to improve the intelligence level of substations, reduce the labor intensity of operators, and prevent personal injury to operators.

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

An electric operation drive mechanism for a grounding switch, characterized in that it includes: a frame, a drive gear, an electromagnetic clutch, a drive shaft, and a motor; the motor is fixedly mounted on the frame, the drive shaft is pinned to the frame, and the electromagnetic The clutch is fixedly installed on the drive shaft, and the drive gear is sleeved on the drive shaft and can rotate freely around the drive shaft. The drive shaft and the drive gear are connected by an electromagnetic clutch; the rear end of the drive shaft extends out of the frame and The connecting rod mechanism is connected with the large shaft operated by the grounding switch; when the electromagnetic clutch is charged, the drive shaft rotates with the drive gear, and when the electromagnetic clutch is de-energized, the connection relationship between the drive shaft and the drive gear is disconnected, and the two can be freely Rotation; the front end of the drive shaft protrudes from the frame and is fixedly installed with two cams, and two micro switches are installed on the corresponding positions above the two cams on the frame. When the cam rotates with the drive shaft, the corresponding micro switches can be pressed down. The touch finger roller of the micro switch changes its on-off state, and the electric operation control device can control the motor to stop rotating and cut off the power supply of the electromagnetic clutch after detecting the state change of the corresponding micro switch.

Preferably, an electric operation drive mechanism for a grounding switch further includes a first gear, a second gear, a transmission shaft and a third gear, the first gear is fixedly installed on the output shaft of the motor, and the two ends of the transmission shaft are installed On the frame, a pin connection relationship is formed with the frame, the third gear is fixedly mounted on the rear end of the transmission shaft, the second gear is fixedly mounted on the front end of the transmission shaft, the first gear is meshed with the second gear, and the third gear is connected with the second gear. The drive gear meshes to connect.

Preferably, a fixed seat is installed at the rear end of the electromagnetic clutch, and the electromagnetic clutch is fixedly mounted on the drive shaft through the fixed seat. The middle part of the electromagnetic clutch is an electromagnet, and the electromagnet is provided with a coil, a static iron core and a moving iron core. The center of the static iron core is provided with a through hole, and a pin is slid through the through hole. The fixed seat is provided with a perforation at the rear end of the static iron core. The front end of the pin is fixedly connected with the moving iron core, and the rear end of the pin can be Slidingly penetrated in the through hole of the fixed seat; the drive gear has a number of oblong holes in an annular array with the drive shaft as the center. When the coil of the electromagnetic clutch is charged, under the action of magnetic force, the The pin will move backwards with the moving iron core and be inserted into the oblong hole of the drive gear. When the coil of the electromagnetic clutch is de-energized, the pin inserted into the oblong hole of the drive gear will follow the The moving iron core moves forward and retracts in the fixed seat.

Preferably, the linkage mechanism is provided with a first crank arm, a connecting rod and a second crank arm, one end of the first crank arm is fixedly connected to the rear end of the drive shaft, and one end of the second crank arm is fixedly connected to the grounding switch The large shaft is operated, and the other end pins of the first crank arm and the second crank arm connect the two ends of the connecting rod.

Preferably, the two cams are provided with radial threaded holes, and the cams are locked and fixed with the drive shaft by locking screws in the threaded holes. By adjusting the fixed position of the cams around the drive shaft, the relationship between the cams and the corresponding microswitches can be changed. The contact position of the stylus finger.

Preferably, a cover plate is provided outside the frame.

The above-mentioned technical scheme has the following advantages:

The electric operation driving mechanism of the grounding switch of the present invention can be conveniently installed in the high-voltage switchgear, and is connected with the large operating shaft of the grounding switch through a connecting rod, so that the existing grounding switch can realize electric operation without any modification, which improves the The intelligent level of high-voltage switchgear reduces the labor intensity of operators and avoids personal injury to operators, and the switching between manual operation mode and electric operation mode is flexible and reliable.

The above description is only an overview of the technical solution of this patent. In order to understand the technical means of this patent more clearly and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of this patent with accompanying drawings. The specific implementation manner of this patent is provided in detail by following embodiment and accompanying drawing thereof.

Description of drawings

Fig. 1 is the schematic diagram that the grounding switch electric operation driving mechanism of the present invention is installed in the switchgear;

Fig. 2 is the cross-sectional structure schematic diagram at section C-C place in Fig. 1;

Fig. 3 is a structural schematic diagram of the electric operation driving mechanism of the grounding switch of the present invention;

Fig. 4 is the schematic diagram of the cross-sectional structure at the section A-A in Fig. 3;

Figure 5 is a view from direction B in Figure 3;

Fig. 6 is a structural schematic diagram of the driving gear of the electric operation driving mechanism of the grounding switch of the present invention.

Among them: 1. Drive gear; 2. Fixed seat; 3. Pin; 4. Static iron core; 5. Coil; 6. Moving iron core; 7. Spring; 8. Motor; 9. Drive shaft; 10. Drive shaft 11, the third gear; 12, the first gear; 13, the second gear; 14, the cam; 15, the cam; 16, the micro switch; 17, the micro switch; 18, the first crank arm; 19, the high voltage switch The right front side panel of the cabinet; 20, the electric operation drive mechanism of the grounding switch; 21, the large shaft for the operation of the grounding switch; 24, the second turning back; 25, the connecting rod; 26, the frame; 27, the electromagnetic clutch.

Detailed ways

The preferred embodiments of this patent will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 6, a grounding switch electric operation drive mechanism, the grounding switch electric operation drive mechanism 20 includes: a frame 26, a drive gear 1, an electromagnetic clutch 27, a drive shaft 10 and a motor 8; the motor 8 Fixedly mounted on the frame 26, the drive shaft 10 is pin-connected to the frame 26, the electromagnetic clutch 27 is fixedly mounted on the drive shaft 10, and the drive gear 1 is sheathed on the drive shaft 10 through its central hole 1-1 , and can freely rotate around the drive shaft 10, the drive shaft 10 is connected to the drive gear 1 through an electromagnetic clutch 27; the rear end 10-1 of the drive shaft 10 extends out of the frame 26 and is operated by a linkage mechanism and a grounding switch The large shaft 21 is connected; when the electromagnetic clutch 27 is electrified, the drive shaft 10 rotates together with the drive gear 1, and when the electromagnetic clutch 27 is de-energized, the connection relationship between the drive shaft 10 and the drive gear 1 is disconnected, and the two can rotate freely ; The front end 10-2 of the drive shaft 10 stretches out from the frame 26 and is fixedly equipped with two cams 14/15, and two microswitches 16/17 are installed on the corresponding positions above the two cams 14/15 on the frame 26 , when the cam 14/15 rotates with the drive shaft 10, the finger roller of the corresponding micro switch 16/17 can be pressed down to change the opening and closing state. After the electric operation control device detects that the state of the corresponding micro switch 16/17 changes Can control motor 8 to stop rotating and cut off the power supply of electromagnetic clutch 27.

Preferably, the grounding switch electric operation driving mechanism 20 also includes a first gear 12, a second gear 13, a transmission shaft 9 and a third gear 11, the first gear 12 is fixedly installed on the output shaft of the motor 8, and the transmission The two ends of the shaft 9 are installed on the frame 26 to form a pin connection relationship with the frame 26. The third gear 11 is fixedly installed on the rear end of the transmission shaft 9, and the second gear 13 is fixedly installed on the front end of the transmission shaft 9. The first gear 12 is meshed with the second gear 13, and the third gear 11 is meshed with the driving gear 1.

Preferably, the rear end of the electromagnetic clutch 27 is equipped with a fixed seat 2, and the electromagnetic clutch 27 is fixedly mounted on the drive shaft 10 through the fixed seat 2. The middle part of the electromagnetic clutch 27 is an electromagnet, and the electromagnet is provided with a coil 5 and a static iron core. 4 and the moving iron core 6, the center of the static iron core 4 is provided with a through hole, and a pin 3 is slid through the through hole, and the fixed seat 2 is provided with a perforation at the rear end of the static iron core 4, and the pin 3. The front end is fixedly connected with the moving iron core 6, and the rear end of the pin 3 is slidably inserted into the perforation of the fixed base 2; the drive gear 1 has several oblong holes 1-1 in an annular array centered on the central hole 1-1. 2. When the coil 5 of the electromagnetic clutch 27 is electrified, under the action of magnetic force, the pin 3 located in the fixed seat 2 of the electromagnetic clutch 27 will move backward with the moving iron core 6 and be inserted into the oblong circle of the drive gear 1 In the hole 1-2, when the coil of the electromagnetic clutch 27 is de-energized, under the elastic force of the spring 7 installed at the front end of the moving iron core 6, the pin 3 inserted into the oblong hole 1-2 of the drive gear 1 will follow The moving iron core 6 moves forward and retracts into the fixed seat 2 .

Preferably, the linkage mechanism is provided with a first crank arm 18, a connecting rod 25 and a second crank arm 24, one end of the first crank arm 18 is fixedly connected to the rear end of the drive shaft 10, and the second crank arm One end of 24 is fixedly connected to the large shaft 21 for operating the grounding switch, and the other end pins of the first crank arm 18 and the second crank arm 24 are connected to the two ends of the connecting rod 25 .

Preferably, the two cams 14/15 are provided with radial threaded holes, and the cams 14/15 are locked and fixed to the drive shaft 10 by locking screws in the threaded holes. By adjusting the fixed position of the cams around the drive shaft, the cams can be changed. The contact position between the cam and the finger roller corresponding to the micro switch.

Preferably, the grounding switch electric operation drive mechanism 20 is fixedly installed on the right front side panel 19 of the high voltage switchgear through the frame 26, and a cover plate 26-1 and a gear cover box 26-2 are provided outside the frame 26.

In summary, the grounding switch electric operation drive mechanism has the following advantages:

1. The electric operation driving mechanism of the grounding switch of the present invention can be conveniently installed in the high-voltage switchgear, and is connected with the large shaft of the grounding switch through the connecting rod mechanism, so that the existing grounding switch can realize the electric operation function without any modification. The intelligence level of the high-voltage switchgear is improved, the labor intensity of the operator is reduced, and personal injury to the operator is avoided.

2. The electromagnetic clutch of the grounding switch electric operation drive mechanism is in the electric operation mode when it is powered on, and it will automatically switch to the manual operation mode when the power is off, and the operation is convenient and flexible.

3. The electric operation drive mechanism of the earthing switch is easy to install and debug, and the cost is low. It can be used in conjunction with ordinary earthing switches produced by different manufacturers, which is convenient for popularization and application.

The above is a detailed introduction to the present invention with a preferred embodiment, but without departing from the spirit and essence of the invention, those skilled in the art can make various corresponding changes and deformations according to the technical content of the present invention, except that Such changes and deformations should all belong to the protection scope of the claims of the present invention.

Claims (6)

1. A grounding switch electric operation driving mechanism, it is characterized in that, comprises: frame, drive gear, electromagnetic clutch, drive shaft, motor; Described motor is fixedly installed on the frame, and described drive shaft pin is connected on the frame, so The electromagnetic clutch is fixedly installed on the drive shaft, the drive gear is sleeved on the drive shaft, and can rotate freely around the drive shaft, the drive shaft and the drive gear are connected by an electromagnetic clutch; the rear end of the drive shaft protrudes The frame is connected with the large shaft of the grounding switch through the linkage mechanism; when the electromagnetic clutch is electrified, the drive shaft rotates with the drive gear, and when the electromagnetic clutch is de-energized, the connection relationship between the drive shaft and the drive gear is disconnected, It can rotate freely; the front end of the drive shaft extends out of the frame and is fixedly installed with two cams, and two micro switches are installed on the corresponding positions above the two cams on the frame. The contact finger roller of the micro switch can change its on-off state, and the electric operation control device can control the motor to stop rotating and cut off the power supply of the electromagnetic clutch after detecting the state change of the corresponding micro switch. 2. The grounding switch electric operation driving mechanism according to claim 1, further comprising a first gear, a second gear, a transmission shaft and a third gear, and the first gear is fixedly mounted on the output shaft of the motor , the two ends of the transmission shaft are installed on the frame to form a pin connection relationship with the frame, the third gear is fixedly installed at the rear end of the transmission shaft, the second gear is fixedly installed at the front end of the transmission shaft, the first gear and the second The gears are in meshing connection, and the third gear is in meshing connection with the driving gear. 3. The grounding switch electric operation driving mechanism according to claim 1, characterized in that, the rear end of the electromagnetic clutch is equipped with a fixed seat, the electromagnetic clutch is fixedly installed on the drive shaft through the fixed seat, and the middle part of the electromagnetic clutch is an electromagnet , the electromagnet is provided with a coil, a static iron core and a moving iron core, the center of the static iron core is provided with a through hole, and a pin is slid through the through hole, and the fixed seat is provided with a perforation at the rear end of the static iron core, The front end of the pin is fixedly connected with the moving iron core, and the rear end of the pin is slidably inserted in the hole of the fixed seat; the drive gear has a number of oblong holes in a circular array with the drive shaft as the center, and the coil of the electromagnetic clutch is charged At this time, under the action of magnetic force, the pin located in the fixed seat of the electromagnetic clutch will move backward with the moving iron core and be inserted into the oblong hole of the drive gear. When the coil of the electromagnetic clutch is de-energized, the spring will Under the action of elastic force, the pin inserted into the oblong hole of the drive gear will move forward along with the moving iron core and be retracted into the fixed seat. 4. The electric operation driving mechanism of the grounding switch according to claim 1, wherein the linkage mechanism is provided with a first crank arm, a connecting rod and a second crank arm, and one end of the first crank arm is connected to the drive shaft One end of the second crank arm is fixedly connected to the large shaft for operating the grounding switch, and the other ends of the first crank arm and the second crank arm are pin-connected to both ends of the connecting rod. 5. The grounding switch electric operation drive mechanism according to claim 1, characterized in that, the two cams are provided with radial threaded holes, and the cams are locked and fixed by the locking screws in the threaded holes and the drive shaft. The fixed position of the cam around the drive shaft can change the contact position between the cam and the corresponding finger roller of the micro switch. 6 . The electric operation driving mechanism of the earthing switch according to claim 1 , wherein a cover plate is provided on the outer side of the frame. 7 .