CN100514779C - Circuit breaker handcart - Google Patents

Abstract

The invention discloses a circuit breaker handcart, which mainly consists of a circuit breaker, a front frame, an opening and closing mechanism, a fixed frame, a moving frame, a screw nut mechanism, a circuit breaker opening and closing indicating mechanism, a circuit breaker position indicating mechanism and auxiliary Composition of trolleys. The propulsion of the circuit breaker in the present invention is carried out in the handcart body without relative movement with the switch cabinet, which improves the flexibility and reliability of the propulsion operation. Switching, closing, energy storage, position and other state indicators and opening and closing operating devices can indicate the timely operation signal of the circuit breaker from the panel of the switch cabinet, and can perform control operations such as opening and closing of the circuit breaker. Provides a good man-machine interface for the operator. The bottom of the handcart is equipped with an auxiliary trolley that is plugged into the handcart. When the handcart is locked in the switch cabinet, it can be pulled out of the cabinet, so that the operation of moving the handcart out and in becomes easier. Easy and simple.

Description

Circuit breaker trolley

technical field

The invention relates to a circuit breaker handcart (hereinafter referred to as handcart) for a 12kV and below three-phase AC 50Hz high-voltage switchgear, which is used in conjunction with other equipment in the switchgear for receiving and distributing power in substations of power transmission and transformation systems. In industrial and mining enterprises, power distribution and other occasions, the load is controlled, protected and monitored.

Background technique

At present, 12kV handcart-type high-voltage switchgear is widely used at home and abroad, and various switchgear manufacturers at home and abroad have launched corresponding products. The advantage of the handcart-type high-voltage switchgear is that it is small in size and easy to use and maintain. When the circuit breaker of one switchgear fails, pull it out of the cabinet, and push in another spare circuit breaker of the same specification to quickly restore power supply. How to move the handcart from the outside of the cabinet to the inside of the cabinet, the operation process of the circuit breaker from the test position to the working position is more convenient and reliable, and it is more convenient for the operator to perform various control operations on the circuit breaker, which is the research direction of various switch cabinet manufacturers .

Contents of the invention

The technical product scheme designed by the present invention is:

A circuit breaker handcart, mainly composed of a circuit breaker, a front frame, an opening and closing mechanism, a fixed frame, a moving frame, a screw nut mechanism, a circuit breaker opening and closing indicating mechanism, a circuit breaker position indicating mechanism and an auxiliary trolley. The circuit breaker is installed on the mobile frame, and the mobile frame moves in the fixed frame through the screw nut mechanism. The circuit breaker moves with the mobile frame to the test position and the working position in the handcart. The fixed front frame of the handcart is equipped with a circuit breaker The position indication part of the circuit breaker, the energy storage indication part of the circuit breaker, the energy storage operation hole, the opening and closing indication part of the circuit breaker, the opening and closing counter of the circuit breaker, the closing button of the circuit breaker and the opening button of the circuit breaker are realized through the opening and closing mechanism For the opening and closing operation of the circuit breaker, the opening and closing state of the circuit breaker is indicated by the opening and closing indicating mechanism of the circuit breaker, and the position of the circuit breaker is indicated by the position indicating mechanism of the circuit breaker, and the auxiliary trolley and the function of carrying the entire handcart The fixed frames of the units are plugged together through clamping plates. When the handcart is pushed into the switch cabinet and the fixed frame is locked with the switch cabinet, the auxiliary trolley can be pulled out from the bottom of the fixed frame. When the handcart needs to be pulled out of the switch cabinet, the auxiliary trolley can be pulled out Cart inserted.

The present invention has the following outstanding beneficial effects:

1. Able to complete the push or exit operation of the circuit breaker from the test position to the working position on the handcart;

2. The front part of the handcart is equipped with state indicating mechanisms such as circuit breaker opening, closing, energy storage, position, etc., which are fixed on the fixed frame of the propulsion mechanism and do not move with the movement of the circuit breaker, so that the handcart is placed in the switch cabinet Finally, the timely operation signal of the circuit breaker can be indicated from the panel of the switch cabinet, and the control operations such as opening and closing of the circuit breaker can be performed, providing a good man-machine interface for the operator;

3. The bottom of the handcart is equipped with an auxiliary trolley plugged in with the handcart, which can be pushed from the outside of the cabinet to the inside of the cabinet together with the handcart. When the handcart is placed in place and locked in the cabinet, the lock between the two can be pulled down The device pulls the auxiliary trolley out of the cabinet. When the handcart needs to be pulled out of the cabinet, the auxiliary trolley is pushed into the cabinet and plugged with the handcart, and the two are locked by the locking device. This scheme makes the circuit breaker handcart The operation of moving from the outside of the cabinet to the inside of the cabinet or from the inside of the cabinet to the outside of the cabinet becomes very easy and simple.

Description of drawings

Figure 1 is a side view of the general structure of the circuit breaker handcart;

Fig. 2 is an enlarged view of part A of Fig. 1;

Figure 3 is a front view of the general structure of the circuit breaker handcart;

Figure 4 is a front view of the circuit breaker handcart position indicating mechanism;

Fig. 5 is a B-B sectional view of the circuit breaker handcart position indicating mechanism.

Detailed ways

The reference signs are explained as follows:

1. Front frame of handcart 2. Handcart panel 3. Support plate 5. Handle

6. Knee arm 7. Connecting rod 8. Panel 9. Button

10. Bracket 11. Push rod 12. Return spring 13. Panel

14. Propel operation shaft 15. Fixed frame 18 Moving frame 19. Lead screw

20. Nut 21. Auxiliary trolley 22. Positioning plate 23. Extension spring

24. Locating pin 25. Wheel 26 Indicator plate shaft 27 Sliding sleeve

28 fixed plate 29. crank arm 30. connecting rod 31. crank arm

32. Circuit breaker 33. Primary plug 34. Opening button

35 Circuit breaker position indicating part 36. Circuit breaker energy storage indicating part

37. Energy storage operation hole 39. Closing button 40. Circuit breaker opening and closing indicating parts

41. Opening and closing counter of circuit breaker 42. Operating shaft of positioning mechanism

43. Handcart positioning insert rod 44. Pallet

45. Card board 46. Indicator board 47. Indicator board shaft 48. Knuckle arm

49. Connecting rod 50. Guide plate 51. Cylindrical pin 52. Guide rod

53. Knuckle arm 54. Extension spring

As shown in Figure 1, the circuit breaker 32 is installed on the moving frame 18, on which the nut 20 is fixed, and the screw 19 is rotated by rotating the push operation shaft 14, so that the circuit breaker moves back and forth between the test position and the working position. The primary plug 33 on the circuit breaker connects or isolates the circuit breaker from the main conductive circuit of the switch cabinet.

As shown in Figures 1, 2 and 3, the front frame 1 of the handcart is installed on the fixed frame 15 of the propulsion mechanism, and the front frame is equipped with a circuit breaker opening and closing device, a circuit breaker opening and closing indicating device and a circuit breaker position indicating device. The opening and closing device of the circuit breaker is composed of the following functional parts: handle 5, crank arm 6, connecting rod 7, button 9 and bracket 10, push rod 11, return spring 12, when the circuit breaker is pushed to the working position, turn The hand handle 5, through the crank arm 6 and the connecting rod 7 fixed on it, makes the bracket 10, the push rod 11 and the return spring 12 rotate counterclockwise to the horizontal position, press the button 9, push the push rod 10 to press down the closing position of the circuit breaker The gate (or opening) device can realize the opening and closing of the circuit breaker. When the circuit breaker is in the test position, directly press the button 9 to depress the closing (or opening) device of the circuit breaker, which can realize the opening and closing of the circuit breaker.

As shown in Figure 1 and Figure 2, the realization of the circuit breaker opening and closing indicator device is as follows: when the circuit breaker is closed (or opened), the main shaft of the circuit breaker rotates to drive the crank arm 31 fixedly connected to it, and the connecting rod 30 drives A fixed toggle arm 30 on the sliding sleeve 27 rotates the sliding sleeve 27 . The sliding sleeve 27 is fixedly connected to the fixed plate 28 on the circuit breaker for positioning. Its front end is a square hole, and the indicating plate shaft 26 is a square shaft. The rotating sleeve 27 drives the indicating plate shaft 26 to move together. The front end of the indicating plate shaft 26 is fixed with Fan-shaped plate, the fan-shaped plate is aligned with the opening on the panel 8 at different positions when the circuit breaker is opened and closed, which can display the opening and closing status of the circuit breaker. In total, the forward and backward movement of the circuit breaker does not affect the indicating state of the indicating plate shaft 26 .

As shown in Figures 4 and 5, the guide plate 50 is a slope with three steps, which is fixed on the moving frame of the circuit breaker handcart. When the moving frame 18 and the guide plate 50 move, the guide rod is moved. The cylindrical pin 51 fixed on the 52 makes the guide rod 52 rotate to three different positions, and the indicator plate shaft 47 and the indicator plate 46 are pulled by the connecting rod 49 to rotate, which can indicate that the handcart is in three positions of test, propulsion process and work respectively. The effect of the spring 54 is to make the cylindrical pin 51 tightly cut against the stepped surface of the guide plate 50 by the above-mentioned mechanism.

As shown in Figures 1 and 3, the auxiliary trolley 21 at the bottom is used to move the handcart from the outside of the switch cabinet into the cabinet or from the inside of the switch cabinet to the outside of the cabinet, and the pallet 44 fixed on the handcart forms a card slot with the handcart. The clamping plate 45 fixed on the auxiliary trolley forms a draw-in groove with the auxiliary trolley, and the two draw-in grooves can be connected together by plugging each other. Cars are positioned relative to each other. After the handcart is pushed into the switch cabinet, press the positioning plate 22 to pull out the auxiliary trolley from the handcart. When it is necessary to remove the handcart from the switch cabinet, insert the auxiliary trolley into the slot of the handcart. Under the action of extension spring 23, the two are locked, and the handcart can be pulled out from the switch cabinet.

As shown in Figure 3, the handcart panel 2 is provided with a circuit breaker position indicating part 35, a circuit breaker opening and closing indicating part 40, a circuit breaker energy storage indicating part 36, an energy storage operation hole 37, a circuit breaker opening and closing counter 41, a circuit breaker Switch-on button 39 and switch-off button 34 of circuit breaker.

Claims (6)

1. A circuit breaker handcart, characterized in that it mainly consists of circuit breaker (32), front frame (1), opening and closing mechanism, fixed frame (15), moving frame (18), lead screw and nut mechanism, circuit breaker The circuit breaker (32) is installed on the mobile frame (18), and the mobile frame (18) is fixed on the fixed frame (15) through the screw nut mechanism. Moving inside, the circuit breaker (32) moves with the moving frame (18) to the test position and working position in the handcart, and the fixed front frame (1) at the front of the handcart is provided with a circuit breaker position indicating part (35), Circuit breaker energy storage indicating part (36), energy storage operation hole (37), circuit breaker opening and closing indicating part (40), circuit breaker opening and closing counter (41), circuit breaker closing button (39) and circuit breaker opening The button (34) realizes the opening and closing operation of the circuit breaker (32) through the opening and closing mechanism, indicates the opening and closing state of the circuit breaker (32) through the circuit breaker opening and closing indicating mechanism, and indicates the opening and closing state of the circuit breaker (32) through the circuit breaker position indicating mechanism Indicate the position of the circuit breaker (32), the auxiliary trolley (21) and the fixed frame (15) carrying the entire handcart functional unit are plugged together through clamping plates (44, 45), when the handcart is pushed into After the fixed frame (15) is locked with the switch cabinet, the auxiliary trolley (21) is drawn out from the bottom of the fixed frame (15), and the auxiliary trolley (21) is inserted when the handcart needs to be pulled out of the switch cabinet. 2. The circuit breaker handcart according to claim 1, characterized in that the screw nut mechanism is composed of a nut (20) and a lead screw (19), wherein the nut (20) is fixed on the moving frame (18) , by turning the propulsion operation shaft (14) to make the lead screw (19) rotate, so that the circuit breaker (32) moves back and forth between the test position and the working position, and the circuit breaker and the switch cabinet are connected through the primary plug (33) installed on the circuit breaker. The main conductive circuit of the circuit is connected or isolated. 3. The circuit breaker handcart according to claim 1, characterized in that the front frame (1) is installed on the fixed frame (15), and the opening and closing mechanism is composed of a rotating handle (5), an opening and closing crank arm (6), connecting rod (7), button (9) and bracket (10), push rod (11), return spring (12), when the circuit breaker (32) is advanced to the working position, by turning the handle (5 ) drives the connecting rod (7) through the crank arm (6) fixed on it, so that the bracket (10), push rod (11) and return spring (12) rotate counterclockwise to the horizontal position, and push the button (9) to push The lever (10) presses the closing or opening device of the circuit breaker to realize the opening and closing of the circuit breaker. When the circuit breaker (32) is at the test position, directly press the button (9) to press the closing or opening of the circuit breaker. The opening device realizes the opening and closing of the circuit breaker. 4. The handcart of circuit breaker according to claim 1, characterized in that, the opening and closing indicating mechanism of the circuit breaker is mainly composed of the lower crank arm (31), the opening and closing indicating link (30), the sliding sleeve (27 ), the upper crank arm (29) and the indicator plate shaft (26). When the circuit breaker is closed or opened, the main shaft of the circuit breaker rotates to drive the lower crank arm (31) fixedly connected with it, and the connecting rod (30 ) drives the fixed upper crank arm (29) on the sliding sleeve (27) to rotate the sliding sleeve (27), the sliding sleeve (27) is fixedly connected to the fixed plate (28) on the circuit breaker for positioning, and the sliding sleeve (27 ) is a square hole at the front end, and the indicator plate shaft (26) is a square shaft. The rotation of the sliding sleeve (27) drives the indicator plate shaft (26) to move together. Different positions are aligned with the openings on the panel (8) when the gate and the gate are closed, showing the opening and closing state of the circuit breaker, and the circuit breaker's opening and closing counter (41) is stirred simultaneously when the fan-shaped plate rotates. 5. The circuit breaker handcart according to claim 1, characterized in that the position indicating mechanism of the circuit breaker is mainly composed of a guide plate (50), a guide rod (52), a position indicating connecting rod (49), an indicating plate shaft ( 47) and an indicator plate (46), the guide plate (50) has a three-step slope, fixed on the mobile frame (18) of the circuit breaker handcart, when the mobile frame (18) and the guide plate (50) move, dial The cylindrical pin (51) fixed on the moving guide rod (52) makes the guide rod (52) rotate to three different positions, and the indicating plate shaft (47) and the indicating plate (46) are pulled to rotate through the position indicating connecting rod (49), Respectively indicate that the handcart is in the three positions of test, propulsion process and work, and the extension spring (54) makes the cylindrical pin (51) close to the The stepped surface of the guide plate (50). 6. The circuit breaker handcart according to claim 1, characterized in that the clamp (44) fixed on the handcart forms a slot with the handcart, and the clamp (45) fixed on the auxiliary trolley and the auxiliary trolley Form a card slot, the two card slots can be connected together by plugging each other, the positioning plate (22) on the auxiliary trolley is inserted into the slot of the clamp plate (44) under the action of the extension spring (23), so that the auxiliary trolley and the hand Cars are mutually positioned, and the positioning plate (22) is pressed, and the auxiliary dolly can be pulled out from the handcart.

Images