CN114420511B - Automatic reclosing device for circuit breaker - Google Patents

Abstract

The invention discloses an automatic reclosing device for a circuit breaker, which comprises: the shell cover is matched with the side shell surface of the circuit breaker in a superposition manner, a positioning shaft which is arranged in an isosceles right triangle manner is arranged in the shell cover, the positioning shaft at the upper end is coaxially arranged with the electric switch, and reclosing assemblies which are symmetrically arranged in a left-right manner are matched on the positioning shafts at the left side and the right side and the shell cover surface; a rotary pushing block sleeved outside the electric switch is rotated; and the touch arc plate is arranged on the outer protection edge of the annular surface of the switch shaft of the electric brake and used for triggering and controlling a fault detection module arranged in the middle of the shell to perform fault detection on the condition of closing the switch of the electric brake.

Description

An automatic reclosing device for a circuit breaker

technical field

The invention relates to the technical field of circuit breaker reclosing, in particular to an automatic reclosing device for circuit breakers.

Background technique

The existing circuit breaker reclosing devices have low reclosing efficiency during the reclosing process. Among them, some devices that use electric motors to drive and control cannot perform instantaneous braking due to the inertia of the motor rotor. In the process of reclosing, the accuracy of pushing the electric gate switch is high, and often the insufficient thrust leads to the complete closing of the electric gate switch, or the large thrust causes the electric gate switch to be subjected to a large thrust and breaks, and the reason for closing the gate Unable to judge, close the gate directly, and then cause the gate to close again, thus there is a greater potential safety hazard.

Therefore, those skilled in the art provide an automatic reclosing device for a circuit breaker to solve the problems raised in the background art above.

Contents of the invention

In order to achieve the above object, the present invention provides the following technical solutions: an automatic reclosing device for a circuit breaker, which includes:

The housing cover that coincides with the side shell of the circuit breaker has positioning shafts arranged in an isosceles right triangle inside, and the positioning shaft at the upper end is coaxially set with the electric switch, and the positioning shafts on the left and right sides and the housing cover The reclosing components arranged symmetrically on the left and right are installed on the board;

Rotate the rotary push block that fits on the outside of the electric gate switch; and

The arc plate is installed on the outer edge guard of the ring surface of the electric switch, and is used to trigger and control the fault detection module arranged in the middle of the shell to detect the fault of the closing state of the electric switch.

As a preferred technical solution of the present invention, a plurality of temperature monitoring elements for monitoring the internal temperature of the circuit breaker are distributed inside the housing.

As a preferred technical solution of the present invention, a fixed ring plate is coaxially provided outside the positioning shaft at the upper end, and an arc-shaped monitoring light strip is installed on the half circle of the fixed ring plate, and is located on the The left and right slant 45° monitoring light strips on the monitoring light strips are respectively installed with red lights and green lights, and are controlled by the sensing pointers arranged on the electric switch panel.

As a preferred technical solution of the present invention, the rotary push block includes: a swivel arc plate sleeved on and rotatably connected to the outside of the shaft of the electric brake switch, and a swivel arc plate fixed to the left and right ends of the swirl arc plate and connected to the electric gate The side of the switch rod is parallel to the push plate, and a rotating column one is installed in the middle of the arc plate of the arc plate.

As a preferred technical solution of the present invention, a pressure sensing pad is installed on the side plate surface of the push plate in contact with the switch rod.

As a preferred technical solution of the present invention, the arc contact plate includes:

The arc pressure plate seat is fixed on the ring surface of the electric switch, and there is a gap cavity between the rear plate surface of the right end plate and the front arc plate surface of the push plate;

The outer arc surface of the upper end of the arc pressing strip installed on the arc pressing plate seat is tangent to the right side arc edge of the pushing plate.

As a preferred technical solution of the present invention, the fault detection module includes:

control module;

The sliding guide rail has a return spring 1 installed at the bottom end of the center, and a connecting slider that is slidably connected to the sliding guide rail is installed on the upper end of the returning spring 1, and a U-shaped conductor 2 is installed on the upper end of the connecting slider;

a push column, the lower end of which is fixed to the bottom end of the second middle part of the conductor, and the upper end of which is equipped with a freely rotating short pressure roller; and

The conductor 1 is attached to the left and right sides of the conductor 2 and connected to the conductive conductor 1, and the conductor 1 on the left and right sides is connected to the control module through wires.

As a preferred technical solution of the present invention, the recloser assembly includes:

The motor installed on the shell has a main bevel gear installed on the output shaft;

The spur gear one installed on the shell cover has a slave bevel gear meshed with the main bevel gear coaxially fixed on its front side;

Rotate the spur gear 2 installed on the right positioning shaft, and mesh with the spur gear 1, and the rotation column 2 is installed on the front wheel surface near the outer edge;

The push-pull plate frame includes an upper plate body in a telescopic structure, and a lower plate body fixed with the upper plate body and having a telescopic chamber, the upper end of the upper plate body is rotatably mounted on the first rotating column; as well as

The elastic telescopic member includes a free-to-expand telescopic guide rod on the shaft, and push springs that are sleeved on the outside of the telescopic guide rod and whose upper and lower ends are respectively connected with the upper and lower ends of the telescopic guide rod. The upper end and the lower end are respectively fixed to the upper end of the telescopic chamber and connected to the rotating column in rotation.

As a preferred technical solution of the present invention, the radius of the second track of the rotating column is three-half times the radius of the first track of the rotating column.

As a preferred technical solution of the present invention, the distance between the lower end of the elastic expansion member and the first rotating column when it is in the minimum compression amount is smaller than the distance between the closest running track of the second rotating column when the first rotating column runs to the leftmost end.

Compared with the prior art, the present invention provides an automatic reclosing device for a circuit breaker, which has the following beneficial effects:

In the present invention, by judging the tripping fault of the passively tripped electric switch, and feeding back the tripping fault in time, the electric switch will not be reclosed blindly, resulting in potential safety hazards in the circuit, thereby improving the safety of closing the electric switch , not only the rotation energy output by the electric force is used for braking, but also through the process of closing the brake multiple times in a cycle, it not only improves the success rate of closing, the closing strength and accuracy, but also avoids the more severe damage caused by conventional motor braking. The large torque accelerates the damage of the motor, resulting in a sharp and continuous decline in the accuracy of the subsequent regulation of the motor.

Description of drawings

Fig. 1 is the structural representation of automatic reclosing device of the present invention;

Fig. 2 is the enlarged schematic view of the partial structure of the fault detection module of the present invention;

Fig. 3 is a structural schematic diagram of the recloser assembly of the present invention;

In the figure: 1. Shell cover; 2. Electric gate switch; 3. Rotary push block; 4. Touch arc plate; 5. Reclosing component; 6. Fault detection module; 7. Temperature monitoring component; 9. Positioning shaft; 31. Rotating arc plate; 32. Pushing plate; 33. Pressure sensing pad; 41. Arc pressing plate seat; 42. Arc pressing bar; 61. Control module; 62. Conductor one; 63. Sliding guide rail; 64, return spring one; 65, conductor two; 66, push column; 67, return spring two; 68, short pressure roller; 51, motor; 52, main bevel gear; 53, from bevel gear; 54, spur gear one ; 55, spur gear two; 56, rotating column two; 57, push-pull plate frame; 58, elastic telescopic part.

Detailed ways

Referring to Figures 1-3, the present invention provides a technical solution: an automatic reclosing device for a circuit breaker, which includes:

The shell 1 that coincides with the side shell of the circuit breaker has positioning shafts 9 arranged in an isosceles right triangle inside, and the positioning shaft 9 at the upper end is coaxially arranged with the electric switch 2, and the positioning shafts at the left and right sides The left and right symmetrical reclosing components 5 are installed on the 9 and on the cover 1 plate;

Rotate the rotary push block 3 that is sleeved on the outside of the electric gate switch 2; and

Installed on the contact arc plate 4 near the outer edge of the electric gate switch 2 shaft annulus, and used to trigger and control the fault detection module 6 arranged in the middle of the housing 1 to perform fault detection on the closing status of the electric gate switch;

Herein, the state of the electric gate switch in Figure 1 is the closed state, and it is in the closed state when it is tilted to the right and fixed, wherein the reclosing components located on the left and right sides are used for active closing and active closing of the electric gate switch respectively, And passive closing of the closing caused by the fault generated after closing.

In this embodiment, a plurality of temperature monitoring elements 7 for monitoring the internal temperature of the circuit breaker are distributed inside the housing 1, and by monitoring the temperature of the circuit breaker, it is possible to quickly determine the cause of the tripping of the switch. That is, when the temperature rises, it is an overload trip. Therefore, as the best embodiment, the temperature monitoring element is provided with feedback to the right reclosing component, and at an interval of a time, the right reclosing component is closed. This process For, the closing step of the overload trip in the fault trip, and the closing step in the active regulation and closing and closing.

In this embodiment, a fixed ring plate is coaxially arranged outside the positioning shaft 9 at the upper end, and an arc-shaped monitoring light belt 8 is installed on the half circle of the fixed ring plate, and is located on the monitoring light belt. The left and right monitoring light strips on the 8 are installed with red lights and green lights corresponding to the 45° left and right, and are controlled by the sensing pointer on the switch 2 board. When the sensing pointer is rotated to the left, the monitoring light The red light is on, otherwise, the green light is on, so that it can be quickly concluded that the electric gate switch is in the state of closing and closing.

In this embodiment, the rotary pushing block 3 includes: a swivel arc plate 31 sleeved on and rotatably connected to the outside of the shaft of the electric switch 2, and a swivel arc plate 31 fixed to the left and right ends of the electric switch The side of the bar is parallel to the push plate 32, and a rotating post 34 is installed in the middle of the arc plate 31.

In this embodiment, a pressure sensing pad 33 is installed on the side plate surface of the push plate 32 that is in contact with the rod of the electric switch, and when the pressure sensing pad on the left side is hit by pressure, it can also monitor the closing of the electric switch. and judge according to the monitoring data of the temperature monitoring element. If the temperature monitoring element does not detect the temperature change of the circuit breaker, it is other reasons for tripping. At this time, the pressure sensing pad will feed back to the reclosing component and prevent The reclosing component is closed and requires circuit maintenance, so that the judgment of whether to perform reclosing is more flexible and accurate when tripping, especially for fault tripping, thereby improving the safety of reclosing.

In this embodiment, the arc plate 4 includes:

The arc pressure plate seat 41 fixed on the ring surface of the electric brake switch 2, and the rear plate surface of the right end plate and the front arc plate surface of the push plate 32 leave a gap cavity, so that the operation and movement of the push-pull plate frame in the reclosing brake assembly;

The arc-pressing lath installed on the arc-pressing board seat 41 has an outer arc surface at the upper end that is tangent to the arc edge on the right side of the pushing plate 32 .

In this embodiment, the fault detection module 6 includes:

A control module 61, configured to receive and process feedback data;

Sliding guide rail 63, return spring one 64 is installed on the bottom end of its center, the upper end of said return spring one 64 is equipped with a connecting slider that is slidably connected with sliding guide rail 63, and a U-shaped conductor is installed on the upper end of said connecting slider 265;

Pushing column 66, its lower end is fixed with the bottom end of the middle part of said conductor 2 65, and its upper end is equipped with a free-rotating short pressure roller 68; and

Connect the conductive conductor one 62 with the left and right sides of the conductor two 65, and the conductor one 62 on the left and right sides communicates with the control module 61 through wires;

The short pressure roller moves down under the pressure of the arc pressure slats, driving the second conductor and the first conductor to contact and connect, thereby starting the fault detection module, thereby increasing the required power for long-term use, and then forming and generating tripping faults" Coexistence and death together", saving resources.

In this embodiment, the recloser assembly 5 includes:

The motor 51 installed on the shell cover 1 has a main bevel gear 52 installed on its output shaft;

The spur gear 1 54 installed on the shell cover 1 is coaxially fixed with a slave bevel gear 53 meshing with the main bevel gear 52 on its front side;

Rotate the spur gear two 55 that is installed on the right positioning shaft 9, and mesh with the spur gear one 54, and it is equipped with a rotating column two 56 on the front wheel surface of the outer edge;

Push-pull plate frame 57, it comprises the upper plate body that is telescopic structure, and the lower plate body that is fixed with upper plate body and has telescoping chamber, and the upper end of described upper plate body is rotatably installed on described rotating column one 34 on; and

The elastic telescopic member 58 includes a freely telescopic guide rod at the shaft, and push springs that are sleeved outside the telescopic guide rod and whose upper and lower ends are respectively connected with the upper and lower ends of the telescopic guide rod. The upper end and the lower end of the rod are respectively fixed to the upper end of the telescopic chamber, and the rotating column-34 is rotationally connected;

Wherein, as a preferred embodiment, the distance between the initial rotating column one and the rotating column two is seven times of the radius of the trajectory of the rotating column one 34, which is considered as the length value of h as shown in Figure 3, and the rotating column one travels to At the leftmost end, the same line as the closest distance between the two running trajectories of the rotating column is set as the push critical line a, such as the right side reclosing component, the deformation of the initial state of the elastic expansion part is zero, that is, when the elastic expansion part The lower end of the spur gear 2 rotates clockwise to drive the rotating column 2 to run from the lowest end until it is in line with the pushing critical line a. The elastic force of the telescopic part resists it, and pushes the electric brake switch to turn right to close. During the process of clockwise rotation of 70° again, the continuously increasing elastic force can further ensure the required thrust strength for the electric brake switch to close. Rotating 70° clockwise again is to elastically release the continuously increasing elastic force, and rotating 60° clockwise again is to elastically release the resisting force. The effect of the action is to release the deformation of the push spring, so that the closing process is relatively stable, and when it is rotated 100° again, the reset of the push-pull plate frame and the rotary push block is completed, forming a closing cycle. After the closing is completed and the motor stops running, due to inertia, the rotor continues to rotate, driving too much rotation, and through the remaining kinetic energy, the closing process is driven to perform multiple closing cycles, which can not only prompt the motor to accelerate Running at high speed can also promote the strength required for closing. It should be noted that the left reclosing component does not operate during the closing process.

In this embodiment, the trajectory radius of the second rotating column 56 is three-half times the trajectory radius of the first rotating column 34 .

In this embodiment, the distance between the lower end of the elastic expansion member 58 and the rotating column 1 34 when it is in the minimum amount of compression is smaller than the distance between the running track of the rotating column 2 56 when the rotating column 1 34 runs to the leftmost end, as shown in The length value of h shown in FIG. 3 is regarded as the distance between the closest running track of the second rotating column when the first rotating column moves to the leftmost end.

During specific implementation, it includes the following steps:

S1: Fit the shell cover with the side shell of the circuit breaker, and install the rotary push block, pressure arc plate, reclosing component, fault detection module, temperature monitoring component and monitoring light strip correspondingly, first pass the right reclosing component Closing and self-resetting;

S2: If the electric gate switch is closed passively, the temperature monitoring element and the pressure sensing pad will automatically feed back to the fault detection module for self-detection of fault tripping, and the gate can also be closed by actively controlling the left reclosing component. , if the reason for arrears is to close the gate;

S3: If there is a fault trip in S2 and the red light continues to light up, it is necessary to repair the circuit or inquire about the electricity bill.

The above is only a preferred embodiment of the invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field within the technical scope of the invention, according to the technical solution of the present invention and its Any equivalent replacement or change of the inventive concept shall fall within the protection scope of the present invention.

Claims (6)

1. An automatic reclosing device for a circuit breaker, characterized in that: it comprises the following steps:

the circuit breaker comprises a shell cover (1) which is in superposition fit with the side shell surface of the circuit breaker, wherein a positioning shaft (9) which is arranged in an isosceles right triangle shape is arranged in the shell cover, the positioning shaft (9) at the upper end is coaxially arranged with a switch (2), and reclosing assemblies (5) which are symmetrically arranged are respectively arranged on the left and right sides of the positioning shaft (9) and the surface of the shell cover (1) in a matched manner;

a rotary pushing block (3) sleeved outside the electric switch (2) in a rotary way; and

the touch arc plate (4) is arranged on the outer protection edge of the shaft ring surface of the electric brake switch (2) and is used for triggering and controlling the fault detection module (6) arranged in the middle of the shell cover (1) to perform fault detection on the condition of closing the electric brake switch;

the rotary pushing block (3) comprises: the rotary arc plate (31) is sleeved on and rotationally connected with the outer side of the shaft part of the electric switch (2), the pushing plates (32) are fixed at the left end part and the right end part of the rotary arc plate (31) and are parallel to the side surface of the rod part of the electric switch, and a rotary column I (34) is arranged in the middle of the arc plate of the rotary arc plate (31);

the reclosing assembly (5) comprises:

a motor (51) mounted on the housing (1), the output shaft of which is mounted with a main bevel gear (52);

a spur gear I (54) mounted on the housing (1), the front side surface of which is coaxially fixed with a slave bevel gear (53) meshed with the master bevel gear (52);

a spur gear II (55) rotatably mounted on the right positioning shaft (9) and meshed with the spur gear I (54), and a rotating column II (56) is mounted on the front wheel surface near the outer edge of the spur gear II;

the push-pull plate frame (57) comprises an upper plate body with a telescopic structure and a lower plate body which is fixed with the upper plate body and provided with a telescopic cavity, and the upper end of the upper plate body is rotatably arranged on the first rotating column (34); and

the elastic telescopic piece (58) comprises a telescopic guide rod which is positioned at the shaft part and stretches freely, and a pushing spring which is sleeved outside the telescopic guide rod, the upper end and the lower end of the pushing spring are respectively connected with the upper end and the lower end of the telescopic guide rod, the upper end and the lower end of the telescopic guide rod are respectively fixed with the upper end of the telescopic chamber, and the first rotating column (34) is connected in a rotating way;

the track radius of the second rotating column (56) is three times of the track radius of the first rotating column (34);

the distance between the lower end of the elastic expansion piece (58) and the rotating column I (34) when the elastic expansion piece is at the minimum compression amount is smaller than the distance between the lower end of the elastic expansion piece and the rotating column II (56) when the rotating column I (34) moves to the leftmost end and the closest moving track of the rotating column II.

2. The recloser device for a circuit breaker according to claim 1, wherein: a plurality of temperature monitoring elements (7) for monitoring the internal temperature of the circuit breaker are also distributed in the shell cover (1).

3. The recloser device for a circuit breaker according to claim 1, wherein: the outside of locating shaft (9) that is located the upper end still coaxial fixed ring board that is equipped with, arc monitoring lamp area (8) are installed to fixed ring board upper half circle face, and are located on monitoring lamp area (8) left and right slope 45's monitoring lamp area is last to correspond respectively to install red light, green light to set up the sensing pointer cooperation control on switch (2) face.

4. The recloser device for a circuit breaker according to claim 1, wherein: a pressure sensing pad (33) is mounted on a side plate surface of a pressing plate (32) which is in surface contact with the switch lever.

5. The recloser device for a circuit breaker according to claim 1, wherein: the touch-and-press arc plate (4) comprises:

an arc pressing plate seat (41) fixed on the shaft ring surface of the electric switch (2), and a gap cavity is reserved between the rear plate surface of the right end plate and the front arc plate surface of the pushing plate (32);

the arc pressing plate is arranged on the arc pressing plate seat (41), and the outer cambered surface of the upper end of the arc pressing plate is tangent with the right side cambered edge of the pushing plate (32).

6. The recloser device for a circuit breaker according to claim 1, wherein: the fault detection module (6) comprises:

a control module (61);

the sliding guide rail (63) is provided with a first reset spring (64) at the bottom end of the center, the upper end of the first reset spring (64) is provided with a connecting sliding block which is in sliding connection with the sliding guide rail (63), and the upper end of the connecting sliding block is provided with a second U-shaped conductor (65);

the lower end of the pushing column (66) is fixed with the bottom end of the middle part of the second conductor (65), and the upper end of the pushing column is provided with a freely rotating short pressing roller (68); and

and the first conductor (62) is connected with the left side surface and the right side surface of the second conductor (65) in a bonding way, and the first conductors (62) on the left side and the right side are communicated with the control module (61) through wires.

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