CN210779789U

CN210779789U - Safety baffle device for drawout breaker

Info

Publication number: CN210779789U
Application number: CN201921674821.8U
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Liangcheng Electromechanical Technology Co Ltd
Current assignee: Shanghai Liangcheng Electromechanical Technology Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-06-16
Anticipated expiration: 2029-10-09

Abstract

A safety baffle device for a drawout circuit breaker comprises a safety baffle, a push rod, a reset piece and a stop shaft. The safety baffle is directly installed on the chassis of the drawer seat of the circuit breaker through the stop shaft, and the long groove on the safety baffle is matched with the stop shaft to implement the vertical movement guiding of the safety baffle and the limiting of the in-place movement of the safety baffle. The push rod is arranged on the side plate of the drawer seat and rotates around the mounting shaft. The push rod is driven by a driving shaft on the breaker body to push the safety baffle, so that the safety baffle is opened by vertical movement. Compared with the prior art, the opening and closing of the safety baffle along with the position change of the breaker body are realized by fewer parts, the structure is more compact, the processing technology is simpler, the work is more reliable, and the overhaul, the maintenance and the disassembly are more convenient; the rotating design of the push rod enables the safe baffle to be completely opened by a shorter circuit breaker body stroke, and the opening force is lighter; after the piece that resets became invalid, safety shield still can reset under self gravity, and electrical isolation is more reliable.

Description

Safety baffle device for drawout breaker

Technical Field

The invention belongs to the field of low-voltage electric appliances, and particularly relates to a drawout device of a circuit breaker.

Background

In a drawout circuit breaker, it is generally composed of a drawout apparatus and a circuit breaker body. When the breaker needs to work normally, the breaker body is shaken into the draw-out device, so that the busbar of the body is contacted with the electric connection terminal of the draw-out device, and electric connection is realized. When the circuit breaker needs to be maintained, tested and other works, the circuit breaker body needs to be shaken out of the draw-out device, so that the busbar of the circuit breaker body is separated from the electric connection terminal of the draw-out device, and a breakpoint is realized. When the circuit breaker body shakes out the drawer seat, because the inlet wire side still probably is electrified, for preventing that operating personnel from touching the interior electricity connection of drawer seat and causing the electric shock accident etc. because of the maloperation, install automatic safety shield between drawer seat electricity connection and the circuit breaker body, realize effectively separating of drawer seat and circuit breaker body.

The safety baffle of the existing circuit breaker drawout device can be automatically opened and closed along with the position change of the circuit breaker body, so that the circuit breaker body is ensured to be in a separation and test position, and the reliable insulation technology of the circuit breaker body is connected. The prior art has a complex structure and large opening force of the safety baffle, and after the elastic reset assembly fails, the safety baffle also fails simultaneously and cannot reset.

Disclosure of Invention

The invention aims to provide a safety baffle device for a draw-out circuit breaker, which has the advantages of compact structure, short opening stroke, light opening force and safer and more reliable electrical isolation.

In order to achieve the technical purpose, the invention designs a brand-new safety baffle device for a drawout circuit breaker, which comprises a safety baffle, a push rod, a reset piece and a stop shaft.

The safety baffle is directly installed on the chassis of the drawer seat of the circuit breaker through the stop shaft, and the long groove on the safety baffle is matched with the stop shaft to implement vertical movement guiding of the safety baffle and limiting of the in-place movement of the safety baffle. The safety baffle is provided with connecting holes matched with the chassis of the drawer seat of the circuit breaker in number, size and position, so that the connection between the circuit breaker body and the drawer seat is ensured when the circuit breaker is opened, and the circuit breaker body and the drawer seat are reliably isolated when the circuit breaker is closed.

And the push rod is arranged on the side plate of the drawer seat and rotates around the mounting shaft. The driving pin on the side plate of the circuit breaker body drives the safety baffle to vertically move, so that the safety baffle is opened and closed. The push rod is provided with two action surfaces forming a certain angle, and the driving pin enables the safety baffle to move upwards through pushing the action surfaces.

Reset the piece, provide the power that resets for the push rod, when the drive shaft left, provide the power that resets, drive the push rod and get back to initial position, safety shield then resets and closes, if reset a failure of piece, the push rod can get back to initial position through self gravity.

The stop shaft is provided with two working sections with different diameters, and the first working section with the small diameter is matched with the long groove on the safety baffle to implement vertical movement guiding of the safety baffle and limiting of the in-place movement of the safety baffle. The second working section with a large diameter prevents the safety shield from disengaging from the stop shaft.

When the circuit breaker body pushes the draw-out device, the driving pin also moves in the direction penetrating into the draw-out device, after the working face of the push rod is touched, the push rod starts to rotate anticlockwise around the mounting shaft, the driving end enables the safety baffle to move upwards by pushing the lug, the connecting hole and the electric connection window are partially or completely overlapped, so that the electric connection window on the bottom frame is opened, and a busbar on the circuit breaker body can be in electric contact with the electric connection terminal behind the bottom frame.

When the circuit breaker body pulls out the draw-out type device, the drive pin also moves to the direction of leaving the draw-out type device, and after the drive pin slided certain distance on the working face of push rod, both contact separation, the push rod has lost the supporting role like this, and under the effect of piece or self gravity that resets, the push rod clockwise rotation resets, and the lug loses the support, and the safety shield resets and closes, realizes opening and close of safety shield along with circuit breaker body position change.

Compared with the prior art, the breaker has the advantages that the opening and closing functions of the safety baffle along with the position change of the breaker body are realized by one plate, the structure is more compact, the processing technology is simpler, the work is more reliable, and the maintenance and the disassembly are more convenient.

The safety baffle has the beneficial effects that the push rod is changed into a rotary design from the traditional direct-acting type, the complete opening action of the safety baffle can be completed in a shorter circuit breaker body stroke, and the opening force is lighter.

The safety baffle has the beneficial effects that the safety baffle can reset under the self gravity, namely, after the resetting piece fails, the safety baffle can still reset reliably, so that the reliable isolation of the drawer seat and the breaker body is ensured, and the safety is higher.

Drawings

Fig. 1 is a schematic structural view of a fully opened state of a safety barrier apparatus for a draw-out circuit breaker according to the present invention

Fig. 2 is a schematic structural view of a fully closed state of the safety barrier apparatus for a draw-out circuit breaker according to the present invention

Fig. 3 is an exploded view of the structure of the safety barrier apparatus for a draw-out type circuit breaker according to the present invention

FIG. 4 is a schematic structural view of the push rod of the present invention in a state where the safety barrier is completely closed

FIG. 5 is a schematic view of the structure of the present invention with the safety shield fully open and the circuit breaker disconnected from the drawer base

FIG. 6 is a schematic structural view of the push rod of the present invention in a fully open state with the safety shield and the circuit breaker in place with the drawer base

Detailed Description

According to fig. 1 and 2, the utility model relates to a draw-out type circuit breaker's safety shield device includes chassis 1, safety shield 2, push rod 3, resets 4, drive round pin 5, guide rail 6, backstop axle 7, circuit breaker body curb plate 8, draw-out type device curb plate 9.

The chassis 1 has a plurality of electrical connection windows 101 allowing the busbar of the circuit breaker body to be inserted and then to be in contact with the electrical connection device of the drawer base. The number of the electrical connection windows 101 is set according to the number of poles of the circuit breaker, for example, a three-pole circuit breaker has 6 electrical connection windows 101, each electrical connection device corresponds to one electrical connection window 101, the electrical connection device includes an incoming line end electrical connection device and an outgoing line end electrical connection device, and a four-pole circuit breaker has 8 electrical connection windows 101. The chassis 1 is also provided with a mounting hole 102 for mounting the stop shaft 7; each side having a notch 103.

According to fig. 3, the safety barrier 2 also has a plurality of connection holes 201, the number and position of which correspond to the electrical connection windows 101 on the chassis 1. The safety barrier 2 has a lug 203 on each side, which corresponds to the notch 103 of the chassis 1. The stop shaft 7 has a structure with two sections of different diameters, wherein the part with the smaller diameter is fixed on the mounting hole 102 of the chassis 1 after passing through the long groove 202 of the safety baffle 2, and the part with the larger diameter is wider than the width of the long groove 202, so that the safety baffle 2 is prevented from being pulled out from the stop shaft 7.

According to fig. 4 to 6, the circuit breaker body has two side plates 8, the outer sides of the side plates 8 each having one drive pin 5, the outer sides referring to two faces of the side plates 8 facing away from each other, rather than two opposing faces.

The drawout apparatus has a guide rail 6 respectively mounted on left and right side plates 9 of the drawout apparatus for guiding the draw-out apparatus to enter or draw out the drawout apparatus, a push rod 3 is mounted on the side plates 9 through a mounting shaft 305 and can rotate around the mounting shaft 305, the push rod 3 has a first working surface 301 and a second working surface 302 forming a certain angle with each other, a mounting hole 303 and a driving end 304, a reset member 4 is mounted on the mounting hole 303 at one end and mounted on the guide rail 6 at the other end to form a reset force to pull the push rod 3 down and then lean against the guide rail 6, the driving end 304 can be inserted into a hole of a lug 203, the reset member 4 can be a spring or other elastic member, the first working surface 301 and the second working surface 302 form such a positional relationship with the drive pin 5, the first working surface 301 has an included angle ∠, ∠ 1 with respect to the moving direction of the drive pin 5 as the opening faces the direction of the draw-out circuit breaker body, the second working

surfaces

302 and 5 do not contact with each other, they form an included angle ∠, the two faces ∠, the opening 5 as the opening 3 facing the direction of the draw-out circuit breaker body, the circuit breaker body when the second working surface 302 and the drive pin contacts with the opening 4833, the second working surface 365, the opening contacts with the direction of the drive pin.

The embodiment of the utility model provides a can adjust the size of opening of safety shield 2 as required. If the safety baffle 2 needs to be opened greatly, the height of the driving pin 5 is increased, so that the contact distance between the driving pin 5 and the first working surface 301 is long, and the rotating angle of the push rod 3 is large. If the opening of the safety barrier 2 is required to be small, the height of the driving pin 5 is adjusted to be low, so that the driving pin 5 has a short contact distance with the first working surface 301 or is not in contact with the first working surface 301 but directly in contact with the second working surface 302, and thus the rotation angle of the push rod 3 becomes small. The opening size of the safety shutter 2 means the overlapping degree of the connection hole 201 and the electrical connection window 101, and the full overlapping state is completely opened, and the partial overlapping state is partially opened. The opening state can be in accordance with the sizes of different breaker body busbars by adjusting the opening size, namely the busbar is small and the opening is small; the bus bar is large and the opening is large. Therefore, the gap between the busbar and the rectangular hole can be reduced, and the insulating property is improved.

The driving pin 5 drives or disengages from the working surface of the push rod 3 to realize the opening or closing of the baffle, and the specific action process is as follows according to fig. 1 to 6:

when the circuit breaker body pushes the drawout device, the driving pin 5 moves along with the drawout device in the same direction, when the driving pin touches the working surface of the push rod 3, the push rod rotates anticlockwise around the mounting shaft 305, the driving end 304 drives the safety baffle 2 to move upwards by pushing the lug 203, so that the connecting hole 201 and the electric connection window 101 are partially or completely overlapped, the electric connection window 101 on the chassis 1 is opened, and the busbar on the circuit breaker body can be electrically contacted with the electric connection terminal behind the chassis 1.

When the circuit breaker body pulls out the draw-out type device, drive pin 5 also moves to same direction thereupon, and the drive is slided after certain distance on the working face of push rod 3, and both contact separation, push rod 3 has lost the supporting role like this, and under the effect of piece 4 that resets or self gravity, push rod 3 clockwise rotation resets, until leaning on guide rail 6, lug 203 loses the support, and safety shield 2 resets and closes, realizes that safety shield 2 opens and close along with the change of circuit breaker body 8 position. If the reset piece 4 fails, the push rod can still return to the initial position by the self gravity.

Further, a plate member having an electrical insulating capability is provided with the connection port 201. The number, size and position of the connectors 201 are matched with the electric connection window 101 on the chassis 1 of the drawer seat of the circuit breaker. The safety baffle 2 is provided with a long groove 202, the stop shaft 7 penetrates through the long groove 202 and is connected to the mounting hole 102, and the safety baffle 2 is mounted on the chassis 1 of the drawer seat of the circuit breaker. The length direction of the long groove 202 is parallel to the opening and closing movement direction of the safety baffle 2, the length of the long groove 202 is slightly larger than the opening width of the electric connection window 101 so as to ensure reliable electric insulation when the safety baffle 2 is closed, the position of the long groove 202 is matched with the opening and closing positions of the safety baffle 2, and the width of the long groove 202 is slightly larger than the stop shaft 7. The safety baffle 2 is provided with a lug 203, the lug 203 is provided with a hole 2031, and one end of the push rod 3 is inserted into the hole 2031, so that the push rod 3 can open and close the safety baffle 2.

While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. A safety baffle device for a drawout breaker comprises a chassis (1), a safety baffle (2), a push rod (3), a reset piece (4), a driving pin (5), a breaker body side plate (8) and a drawout device side plate (9), it is characterized in that the safety baffle (2) is movably arranged on the chassis (1), the driving pin (5) is arranged on a side plate (8) of the breaker body, the push rod (3) is rotatably arranged on a side plate (9) of the draw-out device through a mounting shaft (305), the reset piece (4) enables the push rod (3) to be biased at an initial position, the push rod (3) is inserted into the safety baffle (2) and can drive the safety baffle (2) to move up and down, when the driving pin (5) moves towards the draw-out device, the push rod (3) is pushed to overcome the bias force of the reset piece (4) to rotate, and the safety baffle (2) moves upwards; when the driving pin (5) leaves the draw-out device and is not in contact with the push rod (3), the push rod (3) rotates under the action of the reset piece (4) and returns to the initial position, and the safety baffle (2) moves upwards.

2. A safety barrier arrangement for a draw-out circuit breaker according to claim 1, wherein the safety barrier (2) has a lug (203) on each side, and the drive end (304) of the push rod (3) is inserted into the bore of the lug (203) to drive the movement of the safety barrier (2).

3. The safety barrier device for a draw-out circuit breaker according to claim 2, wherein the push rod (3) has a second working surface (302), and the driving pin (5) rotates the push rod (3) to drive the safety barrier (2) to move upward when contacting the second working surface (302).

4. The safety barrier device for the draw-out circuit breaker according to claim 3, wherein the push rod (3) further has a first working surface (301), the drive pin (5) contacts the first working surface (301) first, the push rod (3) is rotated to drive the safety barrier (2) to move upward, then the drive pin (5) contacts the first working surface (301) again, the push rod (3) is rotated continuously to drive the safety barrier (2) to move upward, and the first working surface (301) and the second working surface (302) form a certain angle.

5. A safety barrier device for a draw-out circuit breaker according to claim 4, further comprising a guide rail (6), the reset member (4) being mounted on the push rod at one end and on the guide rail (6) at the other end, the push rod (3) being biased against the guide rail (6) by the reset member (4) in the initial position.

6. The safety barrier arrangement of claim 5, wherein in the initial position the direction of movement of the drive pin (5) forms an angle ∠ 1 with the first working surface (301) and the direction of movement of the drive pin (5) forms an angle ∠ 2 with the second working surface (302), ∠ 1 being greater than ∠ 2.

7. The safety barrier device for the draw-out circuit breaker according to claim 6, further comprising a stop shaft (7) having two working sections with different diameters, wherein the safety barrier (2) further comprises a long groove (202), wherein a first working section (701) of the stop shaft (7) passes through the long groove (202) and then is fixed on the base frame (1), the diameter of the first working section (701) is smaller than the width of the long groove (202), and the diameter of the second working section (702) is larger than the width of the long groove (202).

8. The safety barrier device for a draw-out circuit breaker according to claim 7, wherein the elongated slot (202) has four spaced positions evenly distributed over the safety barrier (2).

9. The safety barrier device for a draw-out circuit breaker according to claim 7, wherein the base frame (1) further has at least two electrical connection windows (101), and the safety barrier (2) further has at least two connection holes (201), and the safety barrier is opened when the openings of the connection holes (201) at least partially coincide with the openings of the electrical connection windows (101).

10. The safety barrier device for the draw-out circuit breaker according to claim 7, wherein the length direction of the elongated slot (202) is parallel to the moving direction of the safety barrier (2), and the length of the elongated slot (202) is greater than the opening width of the electrical connection window (101) to ensure reliable electrical insulation when the safety barrier (2) is closed.