A circuit breaker with an external voltage sensor

Abstract

The application relates to the technical field of power distribution equipment, and discloses a circuit breaker with an external voltage sensor, which comprises a circuit breaker body, a support arranged on the circuit breaker body, and a voltage sensor arranged on the support; the support comprises two symmetrical stand columns, a connecting rod arranged between the two stand columns, and a support rod arranged on the same side of the two stand columns; one end of the support rod is slidably provided with a limiting baffle; the limiting baffle and one side of the stand column are provided with a hanging plate; and two hanging plates on the same side are hung in the mounting groove of the mounting base; one side of the stand column away from the support rod is provided with a support seat with adjustable height and length; the application can effectively improve the flexibility of support adjustment, thereby improving the convenience of construction; meanwhile, the positioning and installation of the circuit breaker are completed by connecting the mounting base and the support; when the circuit breaker is disassembled and repaired, the mounting base does not need to be removed, damage to the original mounting position is avoided, and the use in a limited space is met.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution equipment, and particularly to a circuit breaker with an external voltage sensor. Background Art

[0002] In the distribution link of the power system, as a core protection and control component, the operating stability and detection accuracy of the circuit breaker directly affect the safe and reliable operation of the power network. To achieve real-time monitoring of the circuit voltage and facilitate fault diagnosis and triggering of protection actions, a circuit breaker with an external voltage sensor has become a commonly used device in the distribution system. By cooperatively installing the voltage sensor with the circuit breaker body, the voltage signal in the circuit can be effectively obtained, providing data support for the stable operation of the power system. The utility model patent with the publication number of CN209328803 discloses a circuit breaker with an external voltage sensor. In this circuit breaker, a bracket is fixed on the circuit breaker housing, three voltage sensors are fixed on the base at equal intervals, then the base is installed on the bracket, and at the same time, the lower wiring board is closely fixed to the current transformer. The primary wire of the voltage sensor is connected to the lower wiring board, and the secondary wire passes through the base and the wire frame and is fixed inside the circuit breaker junction box. This solution realizes the integrated installation of the voltage sensor and the circuit breaker, without the need to separately design an installation bracket. It not only reduces the production cost, decreases the overall volume and weight of the device, saves the occupied space, but also avoids the cumbersome operation of on-site wiring by the staff and shortens the on-site installation time, having certain advantages in practical applications. However, the above-mentioned prior art still has obvious limitations: on the one hand, its bracket structure is a fixed design. After the voltage sensor is fixed on the bracket through the base, its position and height cannot be flexibly adjusted according to the actual installation scenario, detection requirements or the layout of surrounding equipment, resulting in poor adaptability of the device and being difficult to meet the diverse usage requirements in complex distribution environments; on the other hand, the mounting plate of this circuit breaker is directly and centrally fixed on the housing at the bottom of the circuit breaker body. When performing the installation or disassembly operation of the device, it is necessary to first completely remove the mounting plate from the original installation position, and when reinstalling later, it is also necessary to re-drill holes and position on the installation surface. The operation process is cumbersome, and for installation sites with limited space such as in the distribution room, the operations of removal and re-drilling are greatly restricted, not only increasing the construction difficulty, but also possibly causing unnecessary damage to the installation surface, affecting the installation quality and efficiency. Therefore, there is an urgent need for a circuit breaker with an external voltage sensor with an optimized structure to improve the adaptability and construction convenience of the device and meet the actual application requirements of the distribution link of the power system. Summary of the Invention

[0003] The purpose of this invention is to provide a circuit breaker with an external voltage sensor, which can effectively improve the flexibility of bracket adjustment, thereby improving the convenience of construction; at the same time, the circuit breaker can be positioned and installed by means of the connection between the mounting base and the bracket, and the mounting base does not need to be removed during disassembly and maintenance, avoiding damage to the original installation position and meeting the requirements for use in limited spaces.

[0004] The present invention adopts the following technical solution: A circuit breaker with an external voltage sensor includes a circuit breaker body. A bracket is mounted on the housing of the circuit breaker body, and a voltage sensor is mounted on the bracket. The voltage sensor is connected to a current transformer via a primary conductor and to the junction box of the circuit breaker body via a secondary conductor. The bracket includes two symmetrically arranged columns connected by a connecting rod. Support rods for placing the circuit breaker body are provided on the same side of both columns. A limit baffle is slidably provided at the end of each support rod away from the column. An L-shaped hanging plate is provided on the outer side of the limit baffle and the column. The two hanging plates on the same side are hooked into mounting grooves on both sides of the mounting base. A height- and length-adjustable support is provided on the side of the column away from the support rod, and the voltage sensor is mounted on the support.

[0005] Preferably, the mounting base includes a base plate, and mounting plates are provided on both sides of the base plate. Both mounting plates have mounting grooves from top to bottom for the hanging plate to be attached.

[0006] Preferably, both the mounting plate and the hanging plate are provided with threaded holes, and after the hanging plate is hung in the mounting groove, a bolt is threaded into the threaded hole.

[0007] Preferably, the limiting baffle is an L-shaped corner plate.

[0008] Preferably, the support rod has a sliding groove on both sides along its length, a sliding rod is slidably disposed in the sliding groove, and a sliding seat matching the size of the support rod is provided at one end of the sliding rod that extends out of the sliding groove. The limiting baffle is integrally disposed on the sliding seat.

[0009] Preferably, the support includes liftable arms mounted on the column, the length of each arm is adjustable, and a base is provided at the end of each arm away from the column, with the voltage sensor mounted on the base.

[0010] Preferably, the support arm includes an inner fixing sleeve, and an outer sliding sleeve is slidably disposed outside the inner fixing sleeve; both the inner fixing sleeve and the outer sliding sleeve are U-shaped structures, and their opening directions are arranged perpendicularly; an adjustment groove is provided on the column, the inner fixing sleeve is slidably disposed in the adjustment groove, a positioning groove is provided on the inner wall of the adjustment groove, and a positioning rod is movably disposed inside the inner fixing sleeve.

[0011] Preferably, a guide groove is provided on the inner wall of the adjusting groove, and a guide block is provided on the inner fixing sleeve that is slidably connected to the guide groove.

[0012] Preferably, a positioning sleeve is screwed between the two side walls of the outer sliding sleeve via a torsion spring. The end of the positioning sleeve near the column is provided with a positioning tooth. The inner top wall of the inner fixed sleeve is provided with multiple tooth grooves at intervals. In the initial state, the positioning sleeve is in a horizontal state, and the positioning tooth does not contact the tooth groove. A trigger rod is provided at the bottom of the base. The trigger rod is movably inserted into the outer sliding sleeve and connected to a tension spring provided on the inner wall of the outer sliding sleeve. In the initial state, the tension spring is in a stretched state. At this time, the trigger rod abuts against the positioning sleeve, the front end of the positioning sleeve is raised, and the positioning tooth enters the tooth groove.

[0013] Preferably, a push rod is slidably disposed inside the positioning sleeve, and an inclined driving surface is provided at one end of the push rod located outside the positioning sleeve. The positioning block is elastically disposed in the inner fixed sleeve, and its end abuts against the driving surface. A limit block is provided at the bottom of the driving surface, and a limit groove is provided at the bottom of the inner fixed sleeve. A through groove is opened at the top of the rear end of the positioning sleeve, and a positioning tooth plate is elastically disposed on the positioning sleeve at a position corresponding to the through groove. The portion of the push rod located inside the positioning sleeve is provided with a positioning tooth groove. During operation, after the trigger rod contacts the positioning tooth plate, it pushes the positioning tooth plate to move and engage with the positioning tooth groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention sets an adjustable bracket on the side of the column away from the support rod, and installs the voltage sensor on the bracket. The height and horizontal position of the voltage sensor can be flexibly adjusted according to the actual installation space size, the difference in the layout of surrounding equipment, or the voltage detection requirements. This avoids the problem of poor adaptability caused by the fixed position of the sensor, and can better meet the usage requirements of diverse and complex power distribution environments, and reduce the risk that the equipment cannot work properly due to incompatible position.

[0015] This invention utilizes an L-shaped hanging plate on one side of the limiting baffle and the column, with two hanging plates on the same side directly hooked into the mounting slots on both sides of the mounting base, forming a "hook-on installation structure." This replaces the existing design where "the mounting plate is centrally fixed to the bottom shell of the circuit breaker body, requiring removal of the mounting plate and re-drilling for disassembly." During installation, simply inserting the L-shaped hanging plate into the mounting slot of the mounting base completes the positioning. During disassembly, the hanging plate can be directly removed to separate the equipment from the mounting base, eliminating the need to remove the mounting base or re-drill holes in the mounting surface. This significantly simplifies the installation and disassembly process, shortens construction time, and avoids damage to the mounting surface caused by repeated drilling. It is particularly suitable for scenarios with limited space, such as power distribution rooms, effectively reducing construction difficulty and mounting surface maintenance costs. Furthermore, the sliding setting of the limiting baffle on the support rod facilitates pulling the limiting plate to increase its distance from the column, making it easier to place and remove the circuit breaker, thereby improving operational convenience. Attached Figure Description

[0016] Figure 1 This is a side view of the present invention; Figure 2 This is a schematic diagram of the structure of the bracket of the present invention; Figure 3 This is a schematic diagram of the internal fixing sleeve of the present invention; Figure 4 This is a schematic diagram of the structure of the outer sliding sleeve of the present invention; Figure 5 This is a cross-sectional view of the support of the present invention; Figure 6 for Figure 5 Enlarged view of A in the middle; Figure 7 for Figure 2 A magnified view of B in the middle. Detailed Implementation

[0017] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments: like Figures 1 to 7As shown, the circuit breaker with an external voltage sensor according to the present invention includes a circuit breaker body 1. A bracket is provided on the housing of the circuit breaker body 1, and a voltage sensor 3 is provided on the bracket. The voltage sensor 3 is connected to a current transformer 4 through a primary conductor and to the junction box of the circuit breaker body 1 through a secondary conductor. The bracket includes two symmetrically arranged columns 2, which are connected by a connecting rod 5. The connecting rod 5 is fixedly connected to the columns 2 by welding. Support rods 6 are vertically arranged on the same side of the two columns 2, and the support rods 6 are fixedly connected to the columns 2 by welding. Above the two support rods 6 on the circuit breaker body 1, a limit baffle 7 is slidably provided at the end of each support rod 6 away from the column 2. The limit baffle 7 is an L-shaped corner plate, so as to allow for... The bottom corners of the circuit breaker body 1 are protected to enhance the stability of clamping the circuit breaker body 1. The sliding connection between the limiting baffle 7 and the support rod 6 helps to increase the distance between them and the column 2, making it easier to pick up and install the circuit breaker. An L-shaped hanging plate 8 is welded to the outer side of the limiting baffle 7 and the column 2. The two hanging plates 8 on the same side are hung in the mounting slots 9 on both sides of the mounting base. The mounting base is provided with mounting holes. During operation, the mounting base only needs to be fixed in the designated location, and then the hanging plate 8 can be hung in the mounting slot 9. When it is necessary to disassemble and pick up the circuit breaker body 1, simply lift the bracket to remove the hanging plate 8 from the mounting slot 9. There is no need to disassemble the mounting base, thus avoiding the inconvenience of re-drilling holes and providing convenience for installation operations in limited space. The column 2 is provided with a height and length adjustable bracket 10 on the side away from the support rod 6, and the voltage sensor 3 is mounted on the bracket 10. The adjustable setting of the bracket 10 makes it easy to flexibly adjust the height and horizontal position of the voltage sensor 3 according to the actual installation space size, differences in the layout of surrounding equipment, or voltage detection requirements. This avoids the problem of poor adaptability caused by the fixed position of the sensor, and can better meet the usage needs of diverse and complex power distribution environments, reducing the risk that the equipment cannot work properly due to incompatible position.

[0018] In this invention, the mounting base includes a base plate 11, with mounting plates 12 integrally formed on both sides of the base plate 11. Mounting holes are provided on the mounting plates 12, and both mounting plates 12 have mounting grooves 9 from top to bottom for hanging plates 8 to be attached. In addition, threaded holes are provided on both the mounting plates 12 and the hanging plates 8. After the hanging plates 8 are hung into the mounting grooves 9, bolts are threaded into the threaded holes to improve the stability of the connection between the hanging plates 8 and the mounting base.

[0019] In this invention, both sides of the support rod 6 are provided with sliding grooves 13 along their length direction. A sliding rod 14 is slidably arranged in the sliding grooves 13. One end of the sliding rod 14 that extends out of the sliding groove 13 is provided with a sliding seat 15 that matches the size of the support rod 6. A limiting baffle 7 is integrally arranged on the sliding seat 15. A stop block 16 is integrally formed at the end of the sliding groove 13 away from the column 2, and a protrusion 17 is provided at the end of the sliding rod 14 near the column 2. The protrusion 17 is integrally formed with the sliding rod 14. The distance between the two stop blocks 16 is less than the length of the two protrusions 17, so as to limit the sliding rod 14 and prevent the sliding rod 14 from slipping out of the sliding groove 13.

[0020] Furthermore, in this invention, the support 10 includes a liftable support arm 10-1 mounted on the column 2. The support arm 10-1 is arranged perpendicularly to the column 2, and the length of each support arm 10-1 is adjustable. A base 10-2 is provided at the end of each support arm 10-1 away from the column 2, and a voltage sensor 3 is mounted on the base 10-2. Specifically, the support arm 10-1 includes an inner fixing sleeve 10-11, and an outer sliding sleeve 10-12 is slidably disposed outside the inner fixing sleeve 10-11. Both the inner fixing sleeve 10-11 and the outer sliding sleeve 10-12 are U-shaped structures, and their opening directions are arranged perpendicularly. Figure 3 and Figure 4 As shown, the inner fixing sleeve 10-11 has an opening at the front and back, while the outer sliding sleeve 10-12 has an opening at the top and bottom. An adjustment groove 18 is provided on the column 2, and guide grooves 19 are provided on the two symmetrical inner walls of the adjustment groove 18. A guide block 20 is provided on the inner fixing sleeve 10-11 and is slidably connected to the guide groove 19. The inner fixing sleeve 10-11 is slidably positioned in the adjustment groove 18 through the guide block 20. Positioning grooves 21 are provided at height intervals on the inner wall of the adjustment groove 18. A positioning rod 22 is movably provided in the inner fixing sleeve 10-11. By passing the positioning rod 22 through the positioning groove 21, the position positioning of the support arm 10-1 after height adjustment can be completed.

[0021] A positioning sleeve 23 is screwed between the two side walls of the outer sliding sleeve 10-12 via a torsion spring. The end of the positioning sleeve 23 near the column 2 is provided with a positioning tooth 24. The inner top wall of the inner fixed sleeve 10-11 is provided with multiple tooth grooves 25 at intervals. In the initial state, the positioning sleeve 23 is in a horizontal state, and the positioning tooth 24 does not contact the tooth groove 25. A trigger rod 26 is provided at the bottom of the base 10-2. The trigger rod 26 is movably inserted into the outer sliding sleeve 10-12 and connected to a tension spring 27 provided on the inner wall of the outer sliding sleeve 10-12. In the initial state, the tension spring 27 is in a stretched state. At this time, the trigger rod 26 abuts against the positioning sleeve 23, and the positioning sleeve 23 swings along the screw joint point. Its front end tilts up, and the positioning tooth 24 enters the tooth groove 25. The inner fixed sleeve 10-11 and the outer sliding sleeve 10-12 are positioned. The outer sliding sleeve 10-12 cannot slide or adjust relative to the inner fixed sleeve 10-11. When the outer sliding sleeve 10-12 needs to be slid, the base 10-2 is moved upward, causing the trigger rod 26 to disengage from the positioning sleeve 23. The tension spring 27 will be further stretched, and the positioning sleeve 23 will be reset to a horizontal state under the reset action of the torsion spring. At this time, the positioning tooth 24 moves out of the tooth groove 25 and disengages from the positioning. The outer sliding sleeve 10-12 can then be pulled relative to the inner fixed sleeve 10-11 to complete the length adjustment operation of the support arm 10-1. After the adjustment is completed, the base 10-2 is released, and under the pull of the tension spring 27, the trigger rod 26 re-abuts against the positioning sleeve 23, causing its front end to tilt up. The positioning tooth 24 enters the tooth groove 25 to complete the repositioning.

[0022] Furthermore, a push rod 28 is slidably disposed inside the positioning sleeve 23. One end of the push rod 28 located outside the positioning sleeve 23 has an inclined driving surface 29. The positioning rod 22 is elastically disposed within the inner fixing sleeve 10-11 via a first spring 30, and its end also has the same slope as the driving surface 29, abutting against the driving surface 29. A limit block 31 is provided at the bottom of the driving surface 29, and a limit groove 32 is provided at the bottom of the inner fixing sleeve 10-11. A through groove is opened at the top of the rear end of the positioning sleeve 23. A positioning toothed plate 34 is elastically disposed on the positioning sleeve 23 at a position corresponding to the through groove via a second spring 33. Specifically, guide rods 3 are provided on both sides of the positioning toothed plate 34. 5. The positioning sleeve 23 is provided with a through hole for the guide rod 35 to pass through. A second spring 33 is sleeved on the outside of the guide rod 35. The top end of the second spring 33 is fixedly connected to the guide rod 35, and the bottom end is fixedly connected to the positioning sleeve 23. The part of the push rod 28 located inside the positioning sleeve 23 is provided with a positioning tooth groove 36. Due to the limitation of the wire length, the adjustment distance required for the support arm 10-1 is usually not large, so the part with the positioning tooth groove 36 does not need to be too long. During operation, after the trigger rod 26 contacts the positioning tooth plate 34, it pushes the positioning tooth plate 34 to move. The second spring 33 is compressed, and the positioning tooth plate 34 meshes with the positioning tooth groove 36, which can limit the push rod 28. When the length of the support arm 10-1 needs to be adjusted, the trigger rod 26 of the upper base 10-2 moves upward, the positioning sleeve 23 resets, and the limiting block 31 at the bottom of the driving surface 29 of the push rod 28 enters the limiting groove 32. As the outer sliding sleeve 10-12 moves, it will drive the positioning sleeve 23 to move synchronously. At this time, the push rod 28 slides relative to the positioning sleeve 23 under the limitation of the limiting groove 32, ensuring that the position of one end of the driving surface 29 of the push rod 28 remains unchanged. After the adjustment is completed, the base 10-2 is released. Under the reset action of the tension spring 27, the trigger rod 26 first abuts against the positioning tooth plate 34, and the pressing positioning tooth plate 34 moves down and meshes with the positioning tooth groove 36. Since the reset tension of the tension spring 27 is greater than the elastic force of the second spring 33 and the torsion force of the torsion spring, the trigger rod 26 will continue to push the positioning sleeve 23 to swing along the pivot point through the positioning tooth plate 34 until the positioning tooth 24 at the front end of the positioning sleeve 23 enters the tooth groove 25. During the swinging process of the positioning sleeve 23, the driving surface 29 at the end of the push rod 28 will push the positioning block outward, pushing the positioning block into the positioning groove 21 to achieve the positioning of the inner fixing sleeve 10-11. During this process, since the positioning tooth plate 34 is first abutted by the trigger rod 26 and engaged with the positioning tooth groove 36 on the push rod 28, the positioning of the push rod 28 is completed, so there will be no movement of the push rod 28 relative to the positioning sleeve 23. With this optimized setting, during operation, the support arm 10-1 can be adjusted synchronously and stepwise up, down, left, and right by simply moving the base 10-2 upward, which is highly practical.

[0023] When using this invention, first place the bottom shell of the circuit breaker body 1 on the two support rods 6, then control the limit baffle 7 to move towards the shell position and abut against the side wall of the shell, then fix the rear side of the column 2 to the side wall of the circuit breaker body 1 shell, and then hang the hanging plate 8 on the limit baffle 7 into the mounting groove 9 by hoisting to complete the installation operation; the space for installing the voltage sensor 3 is limited, and when it is necessary to adjust the position of the voltage sensor, the base 10-2 can be moved up to move the support arm 10-1 up and down and left and right, which is simple to operate and highly practical.

Claims

1. A circuit breaker with an external voltage sensor, comprising a circuit breaker body, a bracket disposed on the housing of the circuit breaker body, a voltage sensor disposed on the bracket, the voltage sensor being connected to a current transformer via a primary conductor, and the voltage sensor being connected to a junction box of the circuit breaker body via a secondary conductor, characterized in that: The bracket includes two symmetrically arranged columns connected by a connecting rod. Each column has a support rod on the same side for placing the circuit breaker body. Each support rod has a slidable limit plate at the end furthest from the column. An L-shaped hanging plate is provided on the outer side of the column along with the limit plate. The two hanging plates on the same side are hooked into mounting grooves on both sides of the mounting base. A height- and length-adjustable support is provided on the side of the column furthest from the support rod, and the voltage sensor is mounted on this support.

2. The circuit breaker with an external voltage sensor according to claim 1, characterized in that: The mounting base includes a base plate, and mounting plates are provided on both sides of the base plate. Both mounting plates have mounting grooves from top to bottom for the hanging plate to be attached.

3. The circuit breaker with an external voltage sensor according to claim 2, characterized in that: Both the mounting plate and the hanging plate are provided with threaded holes. After the hanging plate is hung in the mounting groove, a bolt is threaded into the threaded hole.

4. The circuit breaker with an external voltage sensor according to claim 1, characterized in that: The limiting baffle is an L-shaped corner plate.

5. The circuit breaker with an external voltage sensor according to claim 4, characterized in that: The support rod has sliding grooves on both sides along its length. A sliding rod is slidably arranged in the sliding groove. One end of the sliding rod that extends out of the sliding groove is provided with a sliding seat that matches the size of the support rod. The limiting baffle is integrally arranged on the sliding seat.

6. The circuit breaker with an external voltage sensor according to claim 1, characterized in that: The support includes liftable arms mounted on the column, each arm having an adjustable length. Each of the two arms has a base at the end furthest from the column, and the voltage sensor is mounted on the base.

7. The circuit breaker with an external voltage sensor according to claim 6, characterized in that: The support arm includes an inner fixing sleeve, and an outer sliding sleeve is slidably disposed outside the inner fixing sleeve; both the inner fixing sleeve and the outer sliding sleeve are U-shaped structures, and their opening directions are arranged perpendicularly; an adjustment groove is provided on the column, the inner fixing sleeve is slidably disposed in the adjustment groove, a positioning groove is provided on the inner wall of the adjustment groove, and a positioning rod is movably disposed inside the inner fixing sleeve.

8. The circuit breaker with an external voltage sensor according to claim 7, characterized in that: The inner wall of the adjustment groove is provided with a guide groove, and the inner fixing sleeve is provided with a guide block that is slidably connected to the guide groove.

9. The circuit breaker with an external voltage sensor according to claim 7, characterized in that: A positioning sleeve is screwed between the two side walls of the outer sliding sleeve via a torsion spring. The end of the positioning sleeve near the column is provided with a positioning tooth. The inner top wall of the inner fixed sleeve is provided with multiple tooth grooves at intervals. In the initial state, the positioning sleeve is in a horizontal state, and the positioning tooth does not contact the tooth groove. A trigger rod is provided at the bottom of the base. The trigger rod is movably inserted into the outer sliding sleeve and connected to a tension spring provided on the inner wall of the outer sliding sleeve. In the initial state, the tension spring is in a stretched state. At this time, the trigger rod abuts against the positioning sleeve, the front end of the positioning sleeve is raised, and the positioning tooth enters the tooth groove.

10. The circuit breaker with an external voltage sensor according to claim 9, characterized in that: A push rod is slidably disposed inside the positioning sleeve. One end of the push rod located outside the positioning sleeve has an inclined driving surface. The positioning block is elastically disposed in the inner fixed sleeve, and its end abuts against the driving surface. A limit block is provided at the bottom of the driving surface, and a limit groove is provided at the bottom of the inner fixed sleeve. A through groove is opened at the top of the rear end of the positioning sleeve. A positioning tooth plate is elastically disposed on the positioning sleeve at a position corresponding to the through groove. The portion of the push rod located inside the positioning sleeve has a positioning tooth groove. During operation, after the trigger rod contacts the positioning tooth plate, it pushes the positioning tooth plate to move and engage with the positioning tooth groove.

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