Novel electric handcart circuit breaker position switching operation mechanism

Abstract

The utility model relates to a novel electric handcart circuit breaker position switching operation mechanism, which belongs to the field of electric handcart switch cabinets and is characterized in that a front-end thread of a screw rod penetrates through a threaded hole in the front side surface of a chassis to abut against the front side wall of an electric handcart chamber, and a rear-end thread of the screw rod penetrates through a threaded hole in the rear side surface of the chassis to abut against the rear side wall of the electric handcart chamber; a threaded sleeve is rotationally arranged on the chassis corresponding to the middle position of the screw rod; meshing teeth are arranged on the outer side wall of the threaded sleeve; by arranging the lead screw, the rotation driving piece and the gears, the handcart circuit breaker can be automatically switched between the test position and the working position, meanwhile, the mechanical driving can be matched with an external control cabinet and a remote controller to achieve remote operation, the operation is convenient, and the operation efficiency is improved. And the unattended operation capability is improved.

Description

Technical Field

[0001] The utility model relates to the field of electric handcart switch cabinets, in particular to a novel electric handcart circuit breaker position switching operating mechanism. Background Art

[0002] Electric trolley switch cabinet refers to a complete set of power distribution equipment assembled from primary and secondary equipment according to a certain line scheme. It is used to control and protect lines and equipment. When working normally, it can cut off and connect the no-load and load current of lines and various electrical equipment. When a system fails, it can cooperate with the relay protection to quickly cut off the fault current to prevent the expansion of the accident. The trolley room is one part of the electric trolley switch cabinet. It is generally located in the middle of the front of the cabinet. It is actually a circuit breaker. The busbar side contacts of the circuit breaker are shown in the busbar room. The moving contacts and static contacts are inserted into the jacks. High-strength tracks are generally set on the left and right sides of the trolley room. The trolley room circuit breaker can move on the track, so that the circuit breaker can be pulled out of the trolley room for maintenance. At present, the trolley circuit breaker can be remotely controlled by the remote control center, but before the busbar contact is completely separated from the busbar plug and the moving and static contacts are completely separated from the socket, the operator still needs to use the handle to move it to the test position before opening the cabinet door to pull out the circuit breaker. When it is in the working position, the above process is repeated in reverse. Therefore, the current operating mechanism has poor unmanned operation capability, and remote operation completed in the absence of "no one" on site needs to be improved. Utility Model Content

[0003] When the existing trolley circuit breaker is switched between the maintenance position and the working position, the trolley circuit breaker needs to be completely separated from the busbar plug and the moving and static contact jacks. However, this operation still requires manual operation using a handle. In order to improve the unattended capability, remote operation in the absence of anyone needs to be improved. The present application can solve the above problems in at least one aspect or one purpose, and designs a new electric trolley circuit breaker position switching operating mechanism, and the specific technical solution adopted is:

[0004] A novel position switching operating mechanism for an electric trolley circuit breaker is arranged on the chassis of the electric trolley circuit breaker, comprising:

[0005] The front thread of the screw rod passes through the threaded hole on the front side of the chassis and abuts against the front side wall of the electric trolley room, and the rear thread passes through the threaded hole on the rear side of the chassis and abuts against the rear side wall of the electric trolley room. The chassis is provided with a screw sleeve for rotation at the middle position of the screw rod, and the outer wall of the screw sleeve is provided with meshing teeth;

[0006] The rotating driving member is connected with a driving gear, and the driving gear is meshed with the meshing teeth of the screw sleeve.

[0007] Preferably, the upper surface of the chassis has a sinking cavity, the edge of the chassis is arranged higher than the sinking cavity, the rotating drive member is an electric motor or a hydraulic motor and is arranged in the sinking cavity, the rotating shaft of the rotating drive member is arranged horizontally and parallel to the screw rod, and the upper surface height of the sinking cavity is higher than the highest position of the rotating drive member and the highest position of the meshing teeth of the driving gear and the outer wall of the screw sleeve.

[0008] Preferably, the rotating driving member is connected to the driving gear via an electric cylinder, and the electric cylinder is connected to a current sensor for detecting the current of the electric cylinder.

[0009] Preferably, the electric cylinder is also connected to a first time relay, and the rotating drive member is connected to a second time relay. The second time relay delays the forward and reverse rotation of the rotating drive member based on the current signal of the current sensor, and the first time relay delays the extension and retraction of the electric cylinder based on the action of the second time relay.

[0010] Preferably, the delay time of the second time relay is shorter than the delay time of the first time relay.

[0011] Preferably, the rear side wall of the electric trolley chamber has a rear sleeve, a rear bearing is arranged in the rear sleeve, and the inner ring of the rear bearing is connected to the rear end of the screw rod by a key.

[0012] Preferably, the front end of the screw rod is symmetrically connected to two rollers, and the two rollers abut against the front side wall of the tram carriage room.

[0013] The utility model has the following technical effects through the above technical solution:

[0014] 1. By setting the screw rod, the rotating drive member and the above-mentioned gear, the automatic switching of the trolley circuit breaker between the test position and the working position can be realized (the test position and the working position refer to the positions of the busbar contacts, the moving and static contacts when they are separated from the socket and inserted into the socket). At the same time, this mechanized drive can cooperate with the external control cabinet and the remote control to realize remote operation and improve the unattended capability.

[0015] 2. By arranging the above-mentioned screw rod and driving the screw rod to rotate in the middle of the screw rod, the driving parts can be reasonably arranged to reduce the space occupied by the driving parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the utility model.

[0017] In the figure, 1, chassis, 2, wheels, 3, guide rails, 4, rear side wall, 5, front side wall, 6, sleeve, 7, rear bearing, 8, key, 9, screw rod, 10, sinker, 11, roller, 12, meshing teeth, 13, driving gear, 14, electric cylinder, 15, first time relay, 16, rotating drive member, 17, second time relay, 18, current sensor, 19, bearing, 20, screw sleeve. DETAILED DESCRIPTION

[0018] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0019] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] like Figure 1 As shown, a novel position switching operating mechanism of an electric trolley circuit breaker is arranged on a chassis 1 of the electric trolley circuit breaker. The electric trolley circuit breaker has wheels 2, which are rollingly arranged in guide rails 3 of a trolley chamber. The guide rails 3 are arranged front and back in the trolley chamber. The electric trolley circuit breaker can be pulled out of the trolley chamber along the guide rails 3. The operating mechanism is an electric mechanism, which can drive the electric trolley circuit breaker to insert or detach the bus contacts and the moving and static contacts thereon into or out of the bus contact jacks and the moving and static jacks. Specifically, it includes a screw rod 9 and a rotating driving member for driving the screw rod 9 to rotate. The rotating driving member is arranged on the chassis 1 of the electric trolley circuit breaker. The rotating driving member here can be an electric motor. The front end thread of the screw rod 9 passes through the threaded hole on the front side of the chassis 1 and abuts against the front side wall 5 of the electric trolley chamber, and the rear end thread passes through the threaded hole on the rear side of the chassis 1 and abuts against the rear side wall 4 of the electric trolley chamber. The chassis is rotatably provided with a screw sleeve 20 at the middle position corresponding to the above-mentioned screw rod. The rotating setting here is specifically that the two ends of the screw sleeve 20 are rotatably arranged on the chassis through two bearings 19, and the outer side wall of the screw sleeve 20 is provided with meshing teeth 12. The meshing teeth 12 here are correspondingly arranged on the outer side wall of the screw sleeve 20 between the two bearings 19, which can mesh with the driving gear connected to the rotating driving member. The rotating driving member drives the active gear 13 and the screw sleeve 20 to rotate, and the rotation of the screw sleeve 20 drives the screw rod 9 to rotate. Since the screw rod 9 cannot move forward and backward when rotating, it can only cause the electric trolley circuit breaker to move forward and backward. The forward and reverse rotation of the screw rod 9 can realize the forward and backward movement of the electric trolley circuit breaker. When moving forward, the busbar contacts of the electric trolley circuit breaker are disengaged from the busbar jack, and the moving contacts and the static contacts are disengaged from the jack, so that the electric trolley circuit breaker is switched from the working position to the test position; when moving backward, the busbar contacts of the electric trolley circuit breaker are inserted into the busbar jack, and the moving contacts and the static contacts are inserted into the jack, so that the electric trolley circuit breaker is switched from the test position to the working position.

[0021] Furthermore, in order to reasonably install the rotating drive member, the screw rod 9 and the driving gear 13 on the chassis 1 without hindering the installation of the circuit breaker, a sink cavity 10 is provided on the upper surface of the chassis 1, and the edge of the chassis 1 is arranged higher than the sink cavity 10. The rotating drive member is an electric motor or a hydraulic motor and is arranged in the sink cavity 10. The rotating shaft of the rotating drive member is arranged horizontally and parallel to the screw rod. The upper surface height of the sink cavity 10 is higher than the highest position of the rotating drive member and the highest position of the meshing teeth 12 of the driving gear 13 and the outer wall of the screw sleeve 20. The rotating drive member is placed on the chassis 1 without hindering the installation of the circuit breaker. It can be matched with any form of circuit breaker without changing the frame of the circuit breaker.

[0022] Furthermore, in order to avoid the phenomenon that the rotating driving member exceeds the load and overheats or burns out due to a fault in the above-mentioned mechanical transmission process, the above-mentioned rotating driving member is connected to the above-mentioned driving gear 13 through the electric cylinder 14, and the electric cylinder 14 is connected to a current sensor 18 for detecting the current of the electric cylinder 14. When the current of the electric cylinder 14 exceeds a preset value, the electric cylinder 14 will drive the driving gear 13 to retreat, so that the driving gear 13 is disengaged from the meshing teeth 12 on the outer wall of the screw sleeve 20, thereby causing the rotating driving member to idle.

[0023] Furthermore, however, when a fault occurs during the above-mentioned mechanical transmission process and the circuit breaker is in the middle position between the test position and the working position (i.e., the baffle is half-open, and the busbar jack or the moving and static contacts are exposed), the moving and static contacts will discharge. In order to avoid this dangerous state, a first time relay 15 is also connected to the electric cylinder 14, and a second time relay 17 is connected to the rotating drive member. The second time relay 17 delays the forward and reverse rotation of the rotating drive member based on the current signal of the current sensor 18, and the first time relay 15 delays the extension and retraction of the electric cylinder 14 based on the action of the second time relay 17.

[0024] Corresponding to the above process, if the screw rod 9 is rotating forward, the mechanical transmission fails or gets stuck during the process of the circuit breaker moving from the test position to the working position, and the current sensor 18 detects that the current exceeds the preset value in the part where the baffle is opened (the exposed part of the socket and the busbar socket). Based on this, the second time relay 17 is activated after a short period of time, and controls the rotating drive member to reverse, the screw rod 9 to reverse, and the circuit breaker to retreat, so that the baffle falls until it completely covers the socket and the busbar socket and is in a safe position. At the same time, after completing the above operation, the first time relay 15 is activated after the time used for the above operation, and the electric cylinder 14 retreats to disengage the driving gear 13 from the meshing teeth 12 on the outer wall of the screw sleeve 20, cutting off the power transmission. At this time, the operator can open it to repair the fault. If the screw rod 9 is reversed, the mechanical transmission fails or gets stuck during the process of the circuit breaker moving from the working position to the test position, and the baffle is partially opened (the exposed part of the socket and the bus socket), and the current sensor 18 detects that the current exceeds the preset value. Based on this, the second time relay 17 is activated after a short period of time, and controls the rotating drive member to reverse, the screw rod 9 is reversed, and the circuit breaker retreats, so that the baffle falls until it completely covers the socket and the bus socket and is in a safe position. At the same time, after completing the above operations, the first time relay 15 is activated after the time used for the above operations, and the electric cylinder 14 retreats to disengage the driving gear 13 from the meshing teeth 12 on the outer wall of the screw sleeve 20, cutting off the power transmission. At this time, the operator can open it to repair the fault.

[0025] Under optimal conditions, the delay time of the second time relay 17 is shorter than the delay time of the first time relay 15, that is, the rotary drive member 16 can react faster to achieve reversal, thereby shortening the time for the circuit breaker to retreat.

[0026] Furthermore, in order to reduce the noise generated by the friction between the two ends of the screw rod 9 and the side walls of the trolley chamber, the rear side wall 4 of the electric trolley chamber has a rear sleeve 6, in which a rear bearing 7 is arranged. The inner ring of the rear bearing 7 is connected to the rear end of the screw rod 9 by a key 8. This connection method can ensure that the screw rod 9 does not move in the front and rear directions and can also ensure rotation. At the same time, when the switch cabinet door is opened to pull out the circuit breaker, the screw rod 9 can be directly disengaged from the inner ring of the above-mentioned rear bearing 7 without special disassembly, which is convenient for operation.

[0027] Furthermore, the front end of the screw rod 9 is symmetrically connected to two rollers 11, which are in contact with the front side wall 5 of the tram carriage room. This structure can directly contact the inner side wall of the cabinet door after the cabinet door is closed, thereby reducing the friction noise between the screw rod 9 and the cabinet door while ensuring that the screw rod 9 does not move in the front and rear directions.

[0028] It should be noted that the roller 11 may have a small gap with the front side wall 5 after the cabinet door is closed, which does not hinder the screw rod 9 from rotating to drive the chassis 1 to move forward and backward, because when the screw rod 9 rotates, the screw rod 9 can be allowed to move forward and backward by the length of the gap. After overcoming the above-mentioned small gap, the chassis 1 can move forward and backward again.

[0029] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0030] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A new type of electric trolley circuit breaker position switching operating mechanism, which is arranged on the chassis of the electric trolley circuit breaker, and is characterized in that: include: A screw rod, the front end thread of the screw rod passes through the threaded hole on the front side of the chassis and abuts against the front side wall of the electric trolley room, the rear end thread of the screw rod passes through the threaded hole on the rear side of the chassis and abuts against the rear side wall of the electric trolley room, the chassis is rotatably provided with a screw sleeve at the middle position corresponding to the screw rod, and the outer side wall of the screw sleeve is provided with meshing teeth; A rotating driving member is connected to a driving gear, and the driving gear is meshed with the meshing teeth of the screw sleeve.

2. According to claim 1, a new type of electric trolley circuit breaker position switching operating mechanism is characterized in that: The upper surface of the chassis has a sinking cavity, the edge of the chassis is arranged higher than the sinking cavity, the rotating drive member is an electric motor or a hydraulic motor and is arranged in the sinking cavity, the rotating shaft of the rotating drive member is arranged horizontally and parallel to the screw rod, and the upper surface height of the sinking cavity is higher than the highest position of the rotating drive member and the highest position of the meshing teeth of the driving gear and the screw sleeve.

3. A novel electric trolley circuit breaker position switching operating mechanism according to claim 1 or 2, characterized in that: The rotating driving member is connected to the driving gear via an electric cylinder, and the electric cylinder is connected to a current sensor for detecting the current of the electric cylinder.

4. According to claim 3, a new type of electric trolley circuit breaker position switching operating mechanism is characterized in that: The electric cylinder is also connected to a first time relay, and the rotating drive member is connected to a second time relay. The second time relay delays the forward and reverse rotation of the rotating drive member based on the current signal of the current sensor, and the first time relay delays the extension and retraction of the electric cylinder based on the action of the second time relay.

5. A novel electric trolley circuit breaker position switching operating mechanism according to claim 4, characterized in that: The delay time of the second time relay is shorter than the delay time of the first time relay.

6. A novel electric trolley circuit breaker position switching operating mechanism according to claim 1, characterized in that: The rear side wall of the electric trolley chamber is provided with a rear sleeve, a rear bearing is arranged in the rear sleeve, and the inner ring of the rear bearing is connected with the rear end of the screw rod through a key.

7. A novel electric trolley circuit breaker position switching operating mechanism according to claim 6, characterized in that: The front end of the screw rod is symmetrically connected to two rollers, and the two rollers are in contact with the front side wall of the tram carriage room.

Images