CN216213111U - 10kV outdoor vacuum circuit breaker's separating brake device - Google Patents
10kV outdoor vacuum circuit breaker's separating brake device Download PDFInfo
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- CN216213111U CN216213111U CN202122844052.5U CN202122844052U CN216213111U CN 216213111 U CN216213111 U CN 216213111U CN 202122844052 U CN202122844052 U CN 202122844052U CN 216213111 U CN216213111 U CN 216213111U
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Abstract
The utility model discloses a switching-off device of a 10kV outdoor vacuum circuit breaker, which comprises a support frame, a switching-off driving assembly, a switching-off plate, a switching-off half shaft, a switching-off pawl shaft and a switching-on holding pawl, wherein the switching-off plate is arranged on the support frame; and a round hole is arranged on the wall of the through hole on the guide sleeve matched with the push rod, and a graphite block is embedded in the round hole. The utility model lubricates the push rod through the graphite block, improves the structures of the half-brake shaft, the brake separating pawl shaft and the closing keeping pawl, and has the advantages of small friction resistance, high reliability, simple structure and the like.
Description
Technical Field
The utility model relates to an opening operation mechanism device of a circuit breaker.
Background
The outdoor high-voltage vacuum circuit breaker is one of electrical equipment which is most widely applied in a power system, is a key element of a power grid, and is widely applied to power grid systems in production and life. The opening operation member is the core of the circuit breaker operation actuator. Along with the change of external environment, reliable opening and closing are particularly important, and the reliability and the service life of an opening and closing operation component directly influence the normal operation of a power grid.
The circuit breaker among the prior art's the reliability of divide-shut brake operation is relatively poor, and its reason mainly lies in: (1) the push rod of the brake-separating electromagnet driving assembly is horizontally arranged, and large friction force needs to be overcome in repeated motion, so that the abrasion is serious, the impact force of the push rod is reduced, and the quick tripping cannot be realized; (2) after closing, the lever needs to be kept in a closing state by a pawl member, for example, the structure disclosed in patent of invention with publication number CN11681908A, a spring operating mechanism of circuit breaker, uses a half shaft, a pawl shaft and a roller to keep closing, however, when opening, the roller on the lever directly disengages from the closing keeping pawl, the relative position between the roller and the closing keeping pawl is uncertain, and hidden danger is buried for next closing, resulting in reduced operation reliability, and the opening pawl in the scheme has two extending parts facing the opening half shaft and the roller, which is complex in shape and difficult to process.
SUMMERY OF THE UTILITY MODEL
The utility model provides a switching-off device of a 10kV outdoor vacuum circuit breaker, which aims to: (1) the friction force borne by the push rod is reduced, and the impact force and the reliability of tripping and brake separating are improved; (2) the problem that the position between the roller and the closing holding pawl is uncertain is solved, and the reliability of opening and closing actions is improved; (3) simplify the structure, reduce the processing degree of difficulty.
The technical scheme of the utility model is as follows:
the switching-off device of the 10kV outdoor vacuum circuit breaker comprises a supporting frame, and further comprises a switching-off driving assembly, a switching-off plate, a switching-off half shaft, a switching-off pawl shaft and a switching-on retaining pawl, wherein the switching-off driving assembly is mounted on the supporting frame, the switching-off half shaft is mounted on the supporting frame in a rotating connection mode, the switching-off plate is fixedly mounted on the switching-off half shaft, the switching-off driving assembly is used for pushing the switching-off plate, and the switching-off driving assembly comprises a fixing frame, a coil, a push rod and a reset spring; the brake-separating driving assembly comprises a fixed frame, a coil, a push rod, a return spring, a guide sleeve and a guide sleeve, wherein the fixed frame is installed on a supporting frame, the coil is installed in the fixed frame, the push rod penetrates through the return spring and the coil and is used for impacting a brake-separating plate under the electromagnetic action of the coil, the return spring is used for pushing the push rod to be far away from the brake-separating plate, the brake-separating driving assembly further comprises the guide sleeve, the guide sleeve penetrates through the coil, two ends of the guide sleeve are fixed on the fixed frame, and the push rod penetrates through the guide sleeve and two ends of the push rod extend out of the fixed frame; a circular hole is formed in the hole wall of the through hole, matched with the push rod, in the guide sleeve, and a graphite block is embedded in the circular hole;
the opening brake catch shaft is mounted on the support frame in a rotating connection mode and is parallel to the opening brake half shaft, an extending part vertically extends out of the opening brake catch shaft, and the tail end of the extending part is provided with a sector surface which corresponds to the position of a notch on the opening brake half shaft; a horizontal through groove is formed in the middle of the extending part; the closing retaining pawl comprises a strip-shaped block body, the inner end of the block body is provided with a hinge hole, and the inner end of the block body extends into the through groove and is rotatably connected with the extending part through the hinge hole; the outer end of the block body is provided with an outer arc surface; a convex part is arranged on one side of the block body, which is far away from the opening half shaft, and the inner angle between the convex part and the outer end of the block body is an inner arc surface; the outer end of the block body is also provided with an outer arc surface; the outer arc surface and the inner arc surface are both used for being matched with a roller arranged on a crank arm of the circuit breaker;
the opening device further comprises a first elastic resetting mechanism and a second elastic resetting mechanism, the first elastic resetting mechanism is used for driving the opening half shaft to reset, and the second elastic resetting mechanism is used for driving the closing holding pawl to rotate so that an inner angle between the protruding portion and the inner end of the block body leans against the edge of the through groove.
As a further improvement of the opening device: a stepped through hole is formed in the guide sleeve, the push rod is in a stepped shaft shape, and the two shaft sections are correspondingly matched with the two hole sections of the stepped through hole one by one; the round hole for embedding the graphite block is arranged on the hole section with larger diameter of the stepped through hole.
As a further improvement of the opening device: the front end of the push rod is provided with an external thread, and the opening driving assembly further comprises a locking nut and an impact column which are matched with the external thread.
As a further improvement of the opening device: the opening driving assembly further comprises a washer sleeved on the push rod, and the washer is located between the locking nut and the front end of the fixing frame.
As a further improvement of the opening device: the front end of the impact column is hemispherical.
Compared with the prior art, the utility model has the following beneficial effects: (1) the graphite block is embedded in the guide sleeve in the opening driving assembly, so that the push rod can be lubricated in the reciprocating motion process, the friction force is reduced, the impact force and the opening reliability are improved, and the service life of the equipment is prolonged; (2) the closing holding pawl is provided with an inner arc surface and an outer arc surface, the outer arc surface is in contact fit with the roller during closing, and the inner arc surface is in contact fit with the roller during opening, so that the problem of uncertainty of relative positions is solved, and the reliability of opening and closing actions is improved; (3) the extension of the separating brake pawl shaft can be matched with the separating brake half shaft, and the closing holding pawl can be installed, so that the structure of the separating brake pawl shaft is simplified, and the processing difficulty is reduced.
Drawings
FIG. 1 is a schematic side view of the device in a closed state of a circuit breaker;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 4 is a schematic side view of the device in a closed state of the circuit breaker;
FIG. 5 is a bottom view of FIG. 4;
FIG. 6 is a schematic sectional view taken along line B-B of FIG. 4;
FIG. 7 is a schematic cross-sectional view of the opening drive assembly;
FIG. 8 is a cross-sectional view of the guide sleeve;
FIG. 9 is a schematic structural view of a tripping half shaft;
FIG. 10 is a schematic view of the construction of the opening latch shaft;
FIG. 11 is a top view of FIG. 10;
fig. 12 is a schematic view of a closing holding pawl.
It should be noted that the action time of the push rod during opening is very short (millisecond), the opening plate is pushed to return immediately, and the opening half shaft is also reset immediately, so the positions of the opening driving component and the opening plate in the opening state are the same as those in the closing state.
Detailed Description
The technical scheme of the utility model is explained in detail in the following with the accompanying drawings:
referring to fig. 1, the switching-off device of the 10kV outdoor vacuum circuit breaker comprises a supporting frame 7, and further comprises a switching-off driving assembly 1, a switching-off plate 2, a switching-off half shaft 3, a switching-off catch shaft 4 and a switching-on holding catch 6 which are installed on the supporting frame 7.
The opening driving component 1 is used for pushing the opening plate 2.
Referring to fig. 7, the opening driving assembly 1 includes a fixing frame 1-1, a coil 1-2, a push rod 1-7 and a return spring 1-8. The fixing frame 1-1 is composed of a U-shaped plate and a vertical plate and is arranged at the bottom of the supporting frame 7. The coil 1-2 is arranged in the fixing frame 1-1, SMC is coated outside, and the two wiring terminals penetrate through the fixing frame 1-1 to be led out. The opening driving assembly 1 further comprises a guide sleeve 1-3, the guide sleeve 1-3 penetrates through the coil 1-2, two ends of the guide sleeve are fixed on the fixing frame 1-1, the push rod 1-7 penetrates through the guide sleeve 1-3, two ends of the push rod extend out of the fixing frame 1-1, and the push rod moves towards the front end under the action of electromagnetic force of the electrified coil 1-2.
Referring to fig. 7 and 8, a round hole is arranged on the wall of the through hole on the guide sleeve 1-3, which is matched with the push rod 1-7, and a graphite block 1-3-1 is embedded in the round hole and is contacted with the push rod 1-7, so that the lubricating effect is achieved, the abrasion of the push rod 1-7 is reduced, the impact force is increased, and the service life is prolonged.
In the embodiment, a stepped through hole is formed in the guide sleeve 1-3, the push rod 1-7 is in a stepped shaft shape, and two shaft sections are correspondingly matched with two hole sections of the stepped through hole one by one; the round hole for embedding the graphite block 1-3-1 is arranged on the hole section with larger diameter of the stepped through hole.
The reset springs 1-8 are used for pushing the push rods 1-7 to be far away from the separating gate plate 2, specifically, the reset springs 1-8 are sleeved at the tail parts of the push rods 1-7, one ends of the reset springs are in contact with the outer side of the tail end of the fixing frame 1-1, and the other ends of the reset springs are in contact with the baffle plate at the tail end of the push rods 1-7.
The front end of the push rod 1-7 is provided with an external thread, and the opening driving component 1 further comprises a locking nut 1-5 and an impact column 1-6 which are matched with the external thread. After loosening the locking nuts 1-5, the position of the impact columns 1-6 can be adjusted. Preferably, the front ends of the impact columns 1-6 are hemispherical.
The opening driving assembly 1 further comprises a washer 1-4 sleeved on the push rod 1-7, and the washer 1-4 is located between the locking nut 1-5 and the front end of the fixing frame 1-1 and used for reducing impact and noise. After the coil 1-2 is powered off, the push rod 1-7 moves towards the tail end direction under the action of the return spring 1-8 until the lock nut 1-5 hits the washer 1-4.
As shown in fig. 1 to 6, two ends of the opening half shaft 3 are vertically installed on the supporting frame 7 in a rotating connection mode through copper sleeves, and the opening plate 2 is fixedly installed at the flat opening at the lower end of the opening half shaft 3 through screws.
As shown in FIG. 9, the opening half shaft 3 has a notch 3-1 in the middle.
As shown in fig. 1 to 6, the two ends of the opening pawl shaft 4 are rotatably connected with a support frame 7 through copper sleeves and are parallel to the opening half shaft 3.
As shown in fig. 3, 6, 10 and 11, the opening latch shaft 4 is vertically extended with an extension 4-1, the end of the extension 4-1 is provided with a sector 4-2, and the sector 4-2 corresponds to the position of the notch 3-1 on the opening half shaft 3. The middle part of the extension part 4-1 is provided with a horizontal through groove 4-3.
As shown in fig. 12, the closing holding pawl 6 comprises a bar-shaped block 6-1, the inner end of the block 6-1 is provided with a hinge hole 6-2, and the inner end of the block 6-1 extends into the through groove 4-3 and is rotatably connected with the extension 4-1 through the hinge hole 6-2. The outer end of the block body 6-1 is provided with an outer arc surface 6-5; one side of the block body 6-1, which is far away from the opening half shaft 3, is provided with a convex part 6-3, and the inner angle between the convex part 6-3 and the outer end of the block body 6-1 is an inner arc surface 6-4; the outer end of the block body 6-1 is also provided with an outer arc surface 6-5. As shown in fig. 3 and 6, the outer arc surface 6-5 and the inner arc surface 6-4 are adapted to cooperate with a roller 5 mounted on a crank arm of the circuit breaker.
The opening device also comprises a first elastic reset mechanism and a second elastic reset mechanism, which are usually torsion springs or springs. The first elastic reset mechanism is used for driving the opening half shaft 3 to reset. The second elastic return mechanism is used to drive the closing holding pawl 6 to rotate so that the inner angle between the projection 6-3 and the inner end of the block 6-1 rests against the edge of the through slot 4-3.
As shown in fig. 1 to 6, when the circuit breaker is closed, the cam of the spring-operated mechanism of the circuit breaker drives the output crank arm to rotate (both in the prior art), the roller 5 mounted on the output crank arm rotates along the inner arc surface 6-4 of the closing holding pawl 6 along with the output crank arm, meanwhile, the force of the roller 5 is transmitted to the opening pawl shaft 4 to rotate and lock the roller on the opening half shaft 3, at this time, the opening half shaft 3 is kept still, the opening pawl shaft 4 is kept still, until the roller 5 is moved to the top of the outer arc surface 6-5 to be still, and the whole mechanism is kept in the closing position, as shown in fig. 3. When the brake is switched off, the push rod 1-7 rapidly extends and impacts the brake switching-off plate 2, the brake switching-off half shaft 3 rotates anticlockwise under the action of force, so that a sector 4-2 of the extending part 4-1 of the brake switching-off pawl shaft 4 slides into a gap 3-1 of the brake switching-off half shaft 3, the brake switching-off pawl shaft 4 rotates anticlockwise to drive the closing holding pawl 6 to rotate, the roller 5 leaves an outer arc surface 6-5 of the closing holding pawl 6 and then reaches an inner arc surface 6-4, and the crank arm rotates to a brake switching-off position under the pushing of other mechanisms (in the prior art), so that the brake switching-off is completed. Meanwhile, the push rod 1-7 is reset immediately, the opening half shaft 3 is reset quickly under the action of the first reset mechanism, the extension part 4-1 of the opening pawl shaft 4 slides out of the notch 3-1 and is continuously blocked by the opening half shaft 3, and finally, the state is shown in fig. 6.
It is emphasized that the mechanism of the crank arm, the energy storage device, the closing device and the related ratchet wheel of the circuit breaker are all the prior art and do not belong to the improvement of the present invention. The circuit breaker spring operating mechanism can be implemented in a circuit breaker by those skilled in the art with reference to other prior art documents (for example, patent of invention with publication number CN11681908A, a circuit breaker spring operating mechanism, etc.), and details thereof are not described herein.
Claims (5)
1. The switching-off device of the 10kV outdoor vacuum circuit breaker comprises a supporting frame (7), and further comprises a switching-off driving assembly (1), a switching-off plate (2), a switching-off half shaft (3), a switching-off pawl shaft (4) and a switching-on holding pawl (6), wherein the switching-off driving assembly (1) is mounted on the supporting frame (7) in a rotating connection mode, the switching-off half shaft (3) is fixedly mounted on the switching-off half shaft (3), the switching-off driving assembly (1) is used for pushing the switching-off plate (2), and the switching-off driving assembly (1) comprises a fixing frame (1-1), a coil (1-2), a push rod (1-7) and a reset spring (1-8); the utility model discloses a quick-witted, including mount (1-1), coil (1-2), push rod (1-7) are used for striking branch flashboard (2) under the electromagnetic action of coil (1-2), reset spring (1-8) and coil (1-2) are passed to mount (1-1) and are installed on support frame (7), coil (1-2) are installed in mount (1-1), reset spring (1-8) are used for promoting push rod (1-7) are far away from branch flashboard (2), its characterized in that: the opening driving assembly (1) further comprises a guide sleeve (1-3), the guide sleeve (1-3) penetrates through the coil (1-2), two ends of the guide sleeve are fixed on the fixing frame (1-1), the push rod (1-7) penetrates through the guide sleeve (1-3), and two ends of the push rod extend out of the fixing frame (1-1); a round hole is arranged on the wall of the through hole on the guide sleeve (1-3) matched with the push rod (1-7), and a graphite block (1-3-1) is embedded in the round hole;
the opening brake pawl shaft (4) is mounted on the support frame (7) in a rotating connection mode and is parallel to the opening brake half shaft (3), an extending part (4-1) vertically extends out of the opening brake pawl shaft (4), a fan-shaped surface (4-2) is arranged at the tail end of the extending part (4-1), and the fan-shaped surface (4-2) corresponds to the position of a notch (3-1) in the opening brake half shaft (3); a horizontal through groove (4-3) is formed in the middle of the extending part (4-1); the closing retaining pawl (6) comprises a strip-shaped block body (6-1), the inner end of the block body (6-1) is provided with a hinge hole (6-2), and the inner end of the block body (6-1) extends into the through groove (4-3) and is rotatably connected with the extending part (4-1) through the hinge hole (6-2); the outer end of the block body (6-1) is provided with an outer arc surface (6-5); a convex part (6-3) is arranged on one side of the block body (6-1) far away from the opening half shaft (3), and an inner angle between the convex part (6-3) and the outer end of the block body (6-1) is an inner arc surface (6-4); the outer end of the block body (6-1) is also provided with an outer arc surface (6-5); the outer arc surface (6-5) and the inner arc surface (6-4) are used for being matched with a roller (5) arranged on a crank arm of the circuit breaker;
the opening device further comprises a first elastic resetting mechanism and a second elastic resetting mechanism, the first elastic resetting mechanism is used for driving the opening half shaft (3) to reset, and the second elastic resetting mechanism is used for driving the closing holding pawl (6) to rotate so that the inner angle between the protrusion (6-3) and the inner end of the block body (6-1) abuts against the edge of the through groove (4-3).
2. The opening device of a 10kV outdoor vacuum circuit breaker according to claim 1, characterized in that: a stepped through hole is formed in the guide sleeve (1-3), the push rod (1-7) is in a stepped shaft shape, and the two shaft sections are correspondingly matched with the two hole sections of the stepped through hole one by one; the round hole for embedding the graphite block (1-3-1) is arranged on the hole section with larger diameter of the stepped through hole.
3. The opening device of a 10kV outdoor vacuum circuit breaker according to claim 1 or 2, characterized in that: the front end of the push rod (1-7) is provided with an external thread, and the opening driving component (1) further comprises a locking nut (1-5) and an impact column (1-6) which are matched with the external thread.
4. The opening device of a 10kV outdoor vacuum circuit breaker according to claim 3, characterized in that: the opening driving assembly (1) further comprises a gasket (1-4) sleeved on the push rod (1-7), and the gasket (1-4) is located between the locking nut (1-5) and the front end of the fixing frame (1-1).
5. The opening device of a 10kV outdoor vacuum circuit breaker according to claim 3, characterized in that: the front ends of the impact columns (1-6) are hemispherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122844052.5U CN216213111U (en) | 2021-11-19 | 2021-11-19 | 10kV outdoor vacuum circuit breaker's separating brake device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122844052.5U CN216213111U (en) | 2021-11-19 | 2021-11-19 | 10kV outdoor vacuum circuit breaker's separating brake device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216213111U true CN216213111U (en) | 2022-04-05 |
Family
ID=80911817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122844052.5U Active CN216213111U (en) | 2021-11-19 | 2021-11-19 | 10kV outdoor vacuum circuit breaker's separating brake device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216213111U (en) |
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2021
- 2021-11-19 CN CN202122844052.5U patent/CN216213111U/en active Active
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