Sliding circuit breaker trip mechanism

Abstract

The application relates to the technical field of contact operating mechanisms, and provides a sliding circuit breaker tripping mechanism, which comprises a frame plate, a closing electromagnet installed on the frame plate, a closing top plate, one end of which is used for cooperating with the closing electromagnet and the other end of which is rotationally connected with a connecting rod, a closing shaft, the shaft body of which is fixedly provided with a rotating arm and a tripping arm, the rotating arm being rotationally connected with the connecting rod, a secondary latch and a cam, which are rotationally arranged on the frame plate, the secondary latch being provided with a first supporting part and a second supporting part, a sleeve, and a telescopic column movably sleeved with the sleeve, one end of the telescopic column located outside the sleeve being fixedly connected with a tripping block, and the first supporting part of the secondary latch abutting against the tripping block and the second supporting part abutting against the cam in an energy storage state. Therefore, the tripping block is arranged to abut against the tripping arm of the closing shaft and the first supporting part of the secondary latch, and the tripping is realized in a sliding mode, so that the abutment amount is not basically restricted, the adjusting range is relatively wide, and the precision requirement of installation is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of contact operating mechanisms, and particularly relates to a sliding circuit breaker tripping mechanism. Background Technology

[0002] Most existing high-voltage vacuum circuit breakers use spring operating mechanisms. To avoid automatic closing, their tripping methods are mostly half-shaft type, such as the structure disclosed in Chinese Patent CN 214428581 U.

[0003] The structure consists of a closing half-shaft pressing against a closing lever, which in turn presses against a cam. During closing, the closing half-shaft rotates, the closing lever disengages from its notch, the energy storage spring releases energy, and the cam rotates to complete the closing action.

[0004] In energy storage mode, the engagement depth of the closing latch and closing half-shaft of this structure needs to be controlled within a relatively small range, that is, neither too large nor too small. If the engagement depth is too large, the closing half-shaft needs to overcome greater friction when disengaging, increasing the difficulty of tripping and even posing a risk of burning out the closing electromagnet coil. With increased use, the wear of components increases. If the engagement depth is too small, the closing latch and closing half-shaft may trip on their own, leading to a dangerous situation of automatic closing without a closing signal.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0006] The technical problem solved by this invention is to reduce the difficulty of tripping, reduce the correlation between the difficulty of tripping and the amount of engagement, and reduce the precision requirements of assembly. By setting the tripping blocks to abut against the tripping arm of the closing shaft and the first support part of the secondary actuator respectively; and by achieving tripping through a sliding method, the amount of engagement is basically unrestricted, has a wide adjustment range, and greatly reduces the precision requirements of installation.

[0007] To solve the above problems, the present invention provides a sliding circuit breaker tripping mechanism, including a frame plate on which a closing electromagnet is mounted.

[0008] The closing top plate is rotatably mounted on the frame plate, with one end used to cooperate with the closing electromagnet and the other end rotatably connected to the connecting rod;

[0009] The closing shaft is rotatably mounted on the frame plate; a rotating arm and a tripping arm are fixedly mounted on the shaft of the closing shaft; the rotating arm is rotatably connected to the connecting rod;

[0010] A secondary actuator and a cam are rotatably mounted on a frame plate; the secondary actuator has an actuator shaft rotatably mounted on the frame plate, and a first support and a second support are fixed on the actuator shaft;

[0011] A sleeve is fixedly mounted on a frame plate; a telescopic column is movably sleeved inside the sleeve; a tripping block is fixedly connected to one end of the telescopic column outside the sleeve; the end face of the tripping block facing the secondary actuator is used to abut against the first support part, and the end face facing the closing shaft is provided with a longitudinal push plate for abutting against the tripping arm.

[0012] In energy storage mode, the first support part of the secondary actuator abuts against the trip block, and the second support part abuts against the cam.

[0013] According to the sliding circuit breaker tripping mechanism of the present invention, at least three racks uniformly arranged around its central axis are fixed on the telescopic column; the inner wall of the sleeve is provided with a gear row with the same number of rows as the number of racks, and each gear row has at least three gears; each rack is meshed with the gears of its corresponding gear row; during the reciprocating extension and retraction of the telescopic column relative to the sleeve, each rack always maintains a meshing relationship with at least two gears.

[0014] According to the sliding circuit breaker tripping mechanism of the present invention, the bottom of the sleeve is further provided with a return spring.

[0015] According to the sliding circuit breaker tripping mechanism of the present invention, the longitudinal push plate is provided with an anti-disengagement block to prevent the tripping arm from disengaging from the longitudinal push plate.

[0016] According to the sliding circuit breaker tripping mechanism of the present invention, the actuator shaft of the secondary actuator is also sleeved with a reset torsion spring; the reset torsion spring has two claws, one claw is engaged with the second support part, and the other claw is engaged with the frame plate.

[0017] According to the sliding circuit breaker tripping mechanism of the present invention, the tripping block has an arc-shaped guide structure on the end face facing the secondary actuator.

[0018] According to the sliding circuit breaker tripping mechanism of the present invention, the portion of the first support part of the secondary actuator that abuts against the tripping block is provided with an actuator roller.

[0019] In summary, this invention sets the tripping blocks to abut against the tripping arm of the closing shaft and the first support part of the secondary actuator respectively; and achieves tripping through a sliding method. Therefore, the amount of tripping is basically unrestricted, with a wide adjustment range, which greatly reduces the accuracy requirements for installation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the energy storage state of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of region A in the middle;

[0022] Figure 3 yes Figure 1 A schematic diagram of the structure of a portion of the circuit in the closed state;

[0023] Figure 4 yes Figure 1 Schematic diagram of the structure of region B in the middle;

[0024] Figure 5 yes Figure 4 Schematic diagram of the structure in the DD direction;

[0025] Figure 6 yes Figure 4 Schematic diagram of the structure of region E in the middle;

[0026] Figure 7 yes Figure 1 Schematic diagram of the structure of region C in the middle;

[0027] Figure 8 yes Figure 7 A schematic diagram of the structure in its working state;

[0028] In the diagram: 1-Closing electromagnet, 11-Crank arm, 12-Roller, 13-First-stage actuator; 2-Closing top plate, 21-Connecting rod, 22-Cam, 23-Closing shaft, 231-Rotating arm, 232-Trigger arm; 24-Trigger block, 241-Vertical push plate, 242-Anti-disengagement block, 243-Guide structure; 25-Telescopic column, 251-Rack; 26-Sleeve, 261-Gear; 27-Return spring; 3-Second-stage actuator, 31-Reset torsion spring, 32-Actuator roller; 4-Assist plate, 41-Assist magnetic block, 42-Guide rod, 43-Reset spring, 44-Drive magnetic block, 45-Assisting electromagnet, 46-Top plate sensor, 47-Separation push rod. Detailed Implementation

[0029] See Figure 1 The present invention provides a sliding circuit breaker tripping mechanism, including...

[0030] A frame plate on which a closing electromagnet 1 is installed;

[0031] The closing top plate 2 is rotatably mounted on the frame plate, with one end used to cooperate with the closing electromagnet 1 and the other end rotatably connected to the connecting rod 21;

[0032] The closing shaft 23 is rotatably mounted on the frame plate; a rotating arm 231 and a tripping arm 232 are fixedly mounted on the shaft of the closing shaft 23; the rotating arm 231 is rotatably connected to the connecting rod 21;

[0033] Combination Figure 2 The secondary actuator 3 and the cam 22 are respectively rotatably mounted on the frame plate; the secondary actuator 3 has an actuator shaft rotatably mounted on the frame plate, and a first support part and a second support part are fixed on the actuator shaft;

[0034] Combination Figure 4 A sleeve 26 is fixedly mounted on a frame plate; a telescopic column 25 is movably sleeved inside the sleeve 26; a tripping block 24 is fixedly connected to one end of the telescopic column 25 outside the sleeve 26; the end face of the tripping block 24 facing the secondary actuator 3 is used to abut against the first support part, and the end face facing the closing shaft 23 is provided with a longitudinal push plate 241 for abutting against the tripping arm 232;

[0035] In the energy storage state, the first support part of the secondary actuator 3 abuts against the release block 24, and the second support part abuts against the cam 22;

[0036] The frame plate is provided with a primary lever 13 and a rotatable crank arm 11, and the crank arm 11 is provided with a roller 12;

[0037] Combination Figure 3 After the closing signal is issued, the closing electromagnet 1 pushes the closing top plate 2 to rotate counterclockwise, and then the connecting rod 21 drives the closing shaft 23 to rotate counterclockwise; the tripping arm 232 pushes the tripping block 24 upward, so that the tripping block 24 disengages from the first support part of the secondary actuator 3; the cam 22 rotates counterclockwise under the action of the energy storage spring and disengages from the second support part of the secondary actuator 3; then the cam 22 pushes the crank arm 11 to rotate under the action of the energy storage spring, and finally the roller 12 of the crank arm 11 tightly abuts against the primary actuator 13, thus completing the closing action.

[0038] Combination Figure 2 The second support of the secondary actuator 3 has an arc-shaped contact surface with the cam 22. In the energy storage state, the pressure (F) applied by the cam 22 to the second support is directed above the center of the actuator shaft. Under the action of the pressure (F), the secondary actuator 3 tends to rotate counterclockwise, but it will not rotate when the trip block 24 is against the first support, thus avoiding the occurrence of self-closing and improving safety.

[0039] The present invention sets the tripping block 24 to abut against the tripping arm 232 of the closing shaft 23 and the first support part of the secondary actuator 3 respectively; and the tripping is achieved by sliding, so the amount of tripping is basically unrestricted, with a wide adjustment range, which greatly reduces the accuracy requirements of installation.

[0040] Preferably, the longitudinal push plate 241 is provided with an anti-disengagement block 242 to limit the stroke of the release arm 232 and prevent it from disengaging from the longitudinal push plate 241.

[0041] Even better, the actuator shaft of the secondary actuator 3 is also sleeved with a reset torsion spring 31; the reset torsion spring 31 has two claws, one claw engaging with the second support and the other claw engaging with the frame plate. After the cam 22 disengages from the second support, the reset torsion spring 31 drives the secondary actuator 3 to reset.

[0042] Furthermore, a return spring 27 is also provided inside the sleeve 26; after the circuit is closed, it helps the telescopic column 25 return to its original position during the process of returning to the energy storage state.

[0043] See Figure 5 In one embodiment, at least three racks 251 uniformly arranged around the central axis are fixed on the telescopic column 25 of the present invention; the inner wall of the sleeve 26 is provided with a gear row with the same number of rows as the racks 251, and each gear row has at least three gears 261; each rack 251 is meshed with the gears 261 of its corresponding gear row. During the reciprocating extension and retraction of the telescopic column 25 relative to the sleeve 26, the racks 251 always maintain a meshing relationship with at least two gears 261, balancing the torsional torque applied by the secondary latch 3 to the release block 24, so that the telescopic column 25 can smoothly complete the extension and retraction action without twisting during the extension and retraction process.

[0044] See Figure 6 Even better, the first support part of the secondary latch 3 that abuts against the release block 24 is provided with a latch roller 32, which converts the sliding friction of the release into rolling friction and reduces the resistance of the release.

[0045] Furthermore, the end face of the trip block 24 facing the secondary actuator 3 has an arc-shaped guide structure 243; this facilitates the first support part abutting against the trip block 24 during energy storage.

[0046] With increased use, components age and wear increases, leading to a decrease in the thrust of the closing electromagnet 1 and an increase in the frictional force experienced by the closing shaft 23 and the secondary actuator 3 during rotation. To ensure smooth disengagement during closing, an assistive component is also installed on the frame plate of this invention.

[0047] See Figure 7 The assisting component includes an assisting plate 4 positioned opposite the closing top plate 2; a guide rod 42 is movably threaded through the assisting plate 4; one end of the guide rod 42 is fixedly connected to an assisting magnetic block 41, and the other end is fixedly connected to a driving magnetic block 44; a return spring 43 located between the driving magnetic block 44 and the assisting plate 4 is also sleeved on the guide rod 42; and an assisting electromagnet 45 is also positioned opposite the driving magnetic block 44.

[0048] The closing top plate 2 is made of magnetic material.

[0049] See Figure 8After the closing signal is issued, the closing electromagnet 1 pushes the closing top plate 2 to rotate. The assisting electromagnet 45 briefly generates magnetism by applying DC current, and the driving magnetic block 44, under the action of magnetic repulsion, pushes the guide rod 42 forward, compressing the return spring 43; the driving magnetic block 44 approaches or attracts the closing top plate 2; then the return spring 43 drives the driving magnetic block 44 to retract, thereby generating a pulling force on the closing top plate 2, thus providing assistance for the subsequent disengagement of the closing half shaft 23 from the secondary actuator 3.

[0050] Since the movement trajectory of the closing top plate 2 is a rotation around the fulcrum, in order to make the driving magnetic block 44 more effectively generate a magnetic attraction force on the closing top plate 2, it is preferable that the driving magnetic block 44 has an arc-shaped protrusion on the side facing the closing top plate 2.

[0051] Furthermore, to prevent the assisting magnetic block 41 from becoming unable to detach from the closing top plate 2, a separation push rod 47 is fixed on the assisting plate 4. When retracted, the separation push rod 47 can abut against the closing top plate 2, which facilitates the reset spring 43 to pull the driving magnetic block 44 away from the closing top plate 2.

[0052] Even better, the assist component also includes a top plate sensor 46 fixed to the frame plate for detecting the passage of the closing top plate 2; when the passage of the closing top plate 2 is detected, the assist electromagnet 45 is energized and the guide rod 42 extends.

[0053] The inventors tested the tripping mechanism of this invention on various types of circuit breakers and achieved good results, especially on the 12kV series LTK-12 indoor high-voltage sulfur hexafluoride circuit breaker.

[0054] In summary, the present invention provides a sliding circuit breaker tripping mechanism, which sets tripping blocks to abut against the tripping arm of the closing shaft and the first support part of the secondary actuator respectively; and achieves tripping through sliding, so the tripping amount is basically unrestricted, has a wide adjustment range, and greatly reduces the installation accuracy requirements.

[0055] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A sliding circuit breaker tripping mechanism, characterized in that, include: A frame plate on which a closing electromagnet is installed; The closing top plate is rotatably mounted on the frame plate, with one end used to cooperate with the closing electromagnet and the other end rotatably connected to the connecting rod; The closing shaft is rotatably mounted on the frame plate; a rotating arm and a tripping arm are fixedly mounted on the shaft of the closing shaft; the rotating arm is rotatably connected to the connecting rod; A secondary actuator and a cam are rotatably mounted on a frame plate; the secondary actuator has an actuator shaft rotatably mounted on the frame plate, and a first support and a second support are fixed on the actuator shaft; A sleeve is fixedly mounted on a frame plate; a telescopic column is movably sleeved inside the sleeve; a tripping block is fixedly connected to one end of the telescopic column outside the sleeve; the end face of the tripping block facing the secondary actuator is used to abut against the first support part, and the end face facing the closing shaft is provided with a longitudinal push plate for abutting against the tripping arm. In energy storage mode, the first support part of the secondary actuator abuts against the trip block, and the second support part abuts against the cam; At least three racks are fixed on the telescopic column and are evenly arranged around its central axis; the inner wall of the sleeve is provided with a gear row with the same number of rows as the number of racks, and each gear row has at least three gears; each rack is meshed with the gears in its corresponding gear row; during the reciprocating extension and retraction of the telescopic column relative to the sleeve, each rack always maintains a meshing relationship with at least two gears.

2. The sliding circuit breaker tripping mechanism as described in claim 1, characterized in that, The bottom of the sleeve is also provided with a return spring.

3. The sliding circuit breaker tripping mechanism as described in claim 1, characterized in that, The longitudinal push plate is provided with an anti-disengagement block to prevent the release arm from detaching from the longitudinal push plate.

4. The sliding circuit breaker tripping mechanism as described in claim 1, characterized in that, The secondary actuator's actuator shaft is also sleeved with a reset torsion spring; the reset torsion spring has two claws, one claw engaging with the second support part and the other claw engaging with the frame plate.

5. The sliding circuit breaker tripping mechanism as described in claim 1, characterized in that, The trip block has an arc-shaped guide structure on its end face facing the secondary actuator.

6. The sliding circuit breaker tripping mechanism as described in any one of claims 1 to 5, characterized in that, The first support part of the secondary actuator, which abuts against the release block, is provided with an actuator roller.

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