CN101819901B - Driving device for two-step action type ground switch - Google Patents

Abstract

The invention discloses a transmission device of a two-step action grounding switch. The fan-shaped plate is embedded in the groove of the slider to guide the action. When the cross-arm shaft rotates, through the linkage of the crank arm I and the crank arm II, The slider fixed on the splint can slide on the circular edge of the fan-shaped plate, so that the conductive tube of the grounding knife first rotates in the vertical plane with the axis of the cross arm as the rotation center, until the slider rotates 90° Slide upward at the straight edge of the fan-shaped plate, so that the conductive tube of the grounding knife moves straight up in the vertical plane, and the contact is inserted into the contact finger. When the switch is in place, the conductive tube of the grounding knife stops moving, and the opening process is the same as the opposite. The invention can make the two-step action of the two-step action grounding switch stable and reliable, the impact of opening and closing is small, and has the characteristics of simple structure, convenient operation, flexible transmission, safety and durability.

Description

A transmission device for two-step action earthing switch

technical field

The invention relates to a transmission device for an earthing switch.

Background technique

With the development of domestic power technology and the increase of power grid capacity, the use of isolating switches is increasing, which is about 2 to 4 times that of circuit breakers. Therefore, the use of grounding switches is also large, and in order to reduce the area occupied by transmission corridors , the use of double-circuit transmission lines on the same tower has become the development trend of my country's backbone grid. When the double-circuit transmission line on the same tower is in one round of operation and another round of maintenance, due to the electrostatic coupling and electromagnetic coupling between the two transmission lines, induced voltage and induced current will be generated in the maintenance circuit, which is harmful to the personal safety of the operators who are undergoing maintenance. cause harm to equipment. In order to ensure the safety of maintenance personnel during maintenance, high-voltage electrical equipment such as high-voltage busbars, circuit breakers, transformers, and isolating switches need to be reliably grounded. The requirements for grounding switches are more stringent, unreliable opening and closing, large impact, and unreasonable structural design And other problems become hidden dangers affecting the safe use of grounding switches.

The two-step action grounding switch can perform two-step actions of rotary motion and linear motion, and has the characteristics of stable and reliable action and small closing impact. Therefore, the use of two-step action grounding switches can meet the requirements of high-voltage electrical equipment for grounding switches. The completion of the two-step action of the step-action grounding switch requires a special transmission mechanism to achieve.

Contents of the invention

The purpose of the present invention is to provide a transmission device with good transmission performance, strong corrosion resistance and long service life for the two-step action grounding switch. In order to achieve the above purpose, the technical solution adopted in the present invention is:

The transmission device includes a slider, a fan-shaped plate, an axle seat I, a cross-arm shaft, an axle sleeve, a crank arm I, a splint I, a crank arm II and a splint II. The axle sleeve is sleeved on the cross-arm shaft and fixed with the axle seat I. The seat I is fixed on the base mounting plate of the grounding switch, the fan-shaped plate is fixed on the shaft sleeve, and the fan surface of the fan-shaped plate is perpendicular to the arc surface of the shaft sleeve, and the positions of the splint I and splint II fixed together correspond to each other and form a sandwich space. They are located between the inner plates at the same end to clamp and fix the conductive tube of the grounding switch and connect the long pins. The outer plate at the other end of the splint I fixes the slider, and the edge of the fan-shaped plate is embedded in the groove on the slider. , in the middle position of splint I and splint II, there are corresponding long holes along the direction of plate length, one end of the cross-arm shaft passes through the long hole, and the other end of the cross-arm shaft is fixedly connected to the four-bar linkage mechanism, and the crank arm I And crank arm II is located in the interlayer space of clamping plate I and clamping plate II and their one ends are hinged, the other end of crank arm I is fixed on the cross arm shaft, and the other end of crank arm II is sleeved on the long pin.

The transmission device also includes a spacer and a shaft seat II, wherein the spacer is fixed between the outer surface of the splint I and the slider, and the shaft seat II is sleeved on the cross-arm shaft and fixed on the base mounting plate of the grounding switch.

The fan-shaped plate of the transmission device is embedded in the groove of the slider, which is used for guiding the action and realizes the two-step action mode of the rotary movement and the vertical movement of the switch. When the cross-arm shaft rotates, through the linkage of the crank arm I and the crank arm II, the slider fixed on the splint can slide on the circular edge of the fan-shaped plate, so that the conductive tube of the grounding knife first moves horizontally in the vertical plane. The supporting shaft rotates as the center of rotation until it rotates 90°, the slider slides upwards on the straight edge of the fan-shaped plate, so that the conductive tube of the grounding knife makes a linear upward movement in the vertical plane, and the contact is inserted into the contact finger , when the closing is in place, the conductive tube of the grounding knife stops moving, and the opening process is opposite to it.

Therefore, the present invention can make the two-step action of the two-step grounding switch stable and reliable, and the opening and closing impact is small, and has the characteristics of simple structure, convenient operation, flexible transmission, safety and durability.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation when the slide block of the present invention rotates when the grounding switch is closed;

Fig. 3 is the structural representation when the slide block of the present invention moves linearly when the earthing switch is closed;

Fig. 4 is a structural schematic diagram of the slide block of the present invention when it rotates when the grounding switch is opened;

Fig. 5 is a structural schematic diagram of the sliding block of the present invention when the grounding switch is opened and moves linearly.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1 and Figure 2, the shaft sleeve 7 is set on the cross-arm shaft 6 and fixed with the shaft seat I4, and the shaft seat I4 and shaft seat II5 are sleeved on the cross-arm shaft 6 and fixed on the base mounting plate 13 of the grounding switch . Sector plate 3 is fixed on the axle sleeve 7, and the sector of sector plate 3 is perpendicular to the arc surface of axle sleeve 7, and the sector angle of sector plate 3 is 90°, which is 1/4 of the circle. The splint I9 and the splint II11 fixed together correspond to each other and form a mezzanine space. They are located between the inner plates of the same end to clamp and fix the conductive pipe 12 of the grounding switch and are fixedly connected to the long pin 16. The other end of the splint I9 is on the outer plate. The slider 2 is fixed by the pad 1, and there are connected grooves along the side walls around the slider 2, and the edge of the fan-shaped plate 3 is embedded in the groove on the slider 2. The middle positions of the clamping plate I9 and the clamping plate II11 are respectively provided with slotted holes 17 corresponding in size along the direction of the length of the plate, and one end of the cross-arm shaft 6 passes through the slotted hole 17, and its other end is fixedly connected to the four-bar linkage mechanism 14. The crank arm I8 and the crank arm II10 are located in the interlayer space of the clamping plate I9 and the clamping plate II11, and their one ends are hinged by the pin 15, the other end of the crank arm I8 is fixed on the cross-arm shaft 6, and the other end of the crank arm II 10 One end is enclosed within on the long pin 16.

As shown in Figure 2 and Figure 3, when the two-step action grounding switch is closed, firstly, the motor operating mechanism drives the cross-arm shaft 6 to rotate through the rotation of the vertical transmission rod 18 and the base four-link 14, and the cross-arm shaft 6 The rotation drives the crank arm I8 to rotate, so that the crank arm I8 drives the crank arm II10, and the crank arm II10 drives the splint I9 and the splint II11 to rotate, and then drives the slider 2 to rotate around the cross-arm shaft 6 along the circular edge of the sector plate 3 At this time, because the circular side of the fan-shaped plate 3 bears against the groove of the slider 2, the splint I9 and the splint II11 cannot move in a straight line along the cross-arm shaft 6. At this time, the cross-arm shaft 6 is located at the top of the long hole 17. When the slide block 2 rotates, the grounding blade conductive pipe 12 also rotates in the vertical plane. When the slide block 2 turns to the other end from one end of the circular edge of the fan-shaped plate 3, after both rotating 90°, through the transmission of the crank arm I8 and the crank arm II10, because the fan-shaped plate 3 no longer withstands the position of the slide block 2 at this moment. Groove, so the clamping plate I9 and the clamping plate II11 start to move vertically upward along the straight edge of the fan-shaped plate 3. At this time, the cross-arm shaft 6 moves downward from the top position of the long hole 17, and the slider 2 moves upward. Make the grounding knife conduction tube 12 move vertically upward in a straight line, so that the moving contact is inserted into the static contact to complete the closing action.

As shown in Fig. 4 and Fig. 5, when the two-step action grounding switch is opened, the operation process is opposite to that of closing. The shaft 6 rotates in the opposite direction, and the rotation of the cross-arm shaft 6 drives the crank arm I8 to rotate, so that the crank arm I8 drives the crank arm II10, and the crank arm II10 drives the slider 2 to move downward along the straight line of the fan-shaped plate 3, and then the grounding knife The conductive tube 12 is driven by the slide block 2 to move vertically downward, and at this time, the cross-arm shaft 6 moves to the top position of the long hole 17, and then the movable contact is withdrawn from the static contact. When the slider 2 moves to the bottom edge of the linear edge of the fan-shaped plate 3, under the transmission of the crank arm I8 and the crank arm II10 at this moment, the slider 2 will switch to the circular edge of the fan-shaped plate 3 for circular motion. At this time, the cross-arm shaft 6 Move to the top position of the long hole 17, so that the grounding knife conductive tube 12 no longer moves downward, but makes a circular motion in the vertical plane, returns to the horizontal opening position after rotating 90°, and contacts with the grounding static above. The head forms a clearly visible vertical fracture.

Claims (2)

1. A transmission device for a two-step action type grounding switch, including a slider (2), a sector plate (3), a shaft seat I (4), a cross arm shaft (6), a shaft sleeve (7), a turn Arm I (8), splint I (9), crank arm II (10) and splint II (11), are characterized in that: the shaft sleeve (7) is sleeved on the cross arm shaft (6) and is connected with the shaft seat I (4 ) is fixed, the shaft seat I (4) is fixed on the base mounting plate (13) of the grounding switch, the fan-shaped plate (3) is fixed on the shaft sleeve (7), and the fan surface of the fan-shaped plate (3) and the shaft sleeve (7) The curved surface of the splint is vertical, and the positions of splint I (9) and splint II (11) fixed together are corresponding and form a mezzanine space. Long pin (16), fixed slide block (2) on the outer plate surface of clamping plate I (9) other end, the plate surface edge of sector plate (3) is embedded in the groove on the slide block (2), on clamping plate I (9) and the middle position of splint II (11) have corresponding elongated holes (17) respectively along the direction of plate length, and one end of cross-arm shaft (6) passes through elongated hole (17), and cross-arm shaft (6 ) is fixedly connected to the four-bar linkage (14), and the crank arm I (8) and the crank arm II (10) are located in the interlayer space of the splint I (9) and splint II (11) and their one ends are hinged , the other end of the crank arm I (8) is fixed on the cross arm shaft (6), and the other end of the crank arm II (10) is sleeved on the long pin (16); when the grounding switch is closed, the cross arm shaft (6) When turning, through the linkage of crank arm I (8) and crank arm II (10), the slider (2) can slide on the circular edge of the fan-shaped plate (3), so that the conductive tube (12) First, in the vertical plane, take the cross-arm shaft (6) as the center of rotation to make a rotational movement, until after rotating 90°, the slider (2) slides upward on the straight edge of the fan-shaped plate (3), so that the conductive tube (12 ) moves upward in a straight line in the vertical plane, the contact is inserted into the contact finger, and when the switch is in place, the conductive tube (12) stops moving, and the opening process is opposite to it. 2. A transmission device for a two-step action grounding switch according to claim 1, characterized in that: the transmission device also includes a spacer (1) and a shaft seat II (5), wherein the spacer (1 ) is fixed between the outer surface of the splint I (9) and the slider (2), and the shaft seat II (5) is sleeved on the cross arm shaft (6) and fixed on the base mounting plate (13) of the grounding switch.

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