A smart circuit breaker controller withstand voltage detection isolation structure

Abstract

A kind of intelligent circuit breaker controller withstand voltage detection isolation structure, it is characterized in that: it includes knob, the knob is installed in the installation slot hole of middle cover can rotate, the knob can be linked with push rod during rotation, push rod is equipped with reset spring, push rod can move up and down under the action of the knob and reset spring, push rod is further equipped with at least one dynamic contact piece, push rod can drive the dynamic contact piece and the contact or separation of the wiring terminal pair on electronic circuit board during up and down movement, the contact or separation of the dynamic contact piece and the wiring terminal pair on electronic circuit board can realize the on-off of the controller.The withstand voltage detection isolation of entire circuit breaker is not only simple to operate, but also can realize effective isolation and contact.In the case where the controller is not disassembled, withstand voltage test can be realized to the main circuit outside the controller.

Description

Technical Field

[0001] This invention belongs to the technical field of circuit breakers, specifically relating to a withstand voltage detection isolation structure for an intelligent circuit breaker controller. Background Technology

[0002] With the development of technologies such as digitalization and automation, the intelligentization of power grid technology has become an inevitable trend. As an indispensable low-voltage distribution device in the power system, molded case circuit breakers (MCCBs) are facing increasing demands for intelligentization. Intelligent circuit breakers, relying on the Internet of Things (IoT), combine traditional circuit breakers with IoT technology. Through controllers, they achieve intelligent management of low-voltage power distribution networks, tracking and analyzing data such as conductor temperature, current, voltage, power, and product lifespan, promptly identifying potential safety hazards.

[0003] As the control core of a smart circuit breaker, the controller is mainly composed of electronic components such as microprocessors, integrated circuits, and electronic component boards. These components cannot withstand the power frequency withstand voltage and impulse voltage of the main circuit. Therefore, an isolation structure is needed to effectively isolate the controller from the main circuit during withstand voltage testing, so as to prevent the controller from being broken down and causing its function to fail.

[0004] Chinese patent ZL201610183683.8 discloses an electronic controller for circuit breakers and a circuit breaker. The electronic controller includes a housing, electronic control circuitry, and an isolation device. The isolation device includes a fixed part, a movable part, a driving part, and an elastic element. The elastic element is disposed between the driving part and the housing. This elastic element can drive the movable part to a disconnected position, separating it from the fixed part. When the driving part is in a fixed position secured to the housing by a locking structure, it can overcome the force of the elastic element to move the movable part to a connected position, connecting it to the fixed part. This isolation device of the electronic controller for circuit breakers has a simple structure and can reliably isolate the electronic controller from the high voltage of the circuit breaker during withstand voltage tests. However, the isolation structure of this circuit breaker is direct-acting, and the movable part is rectangular, requiring a large external space. Furthermore, after contact, screws are needed to maintain the locking of the structure, making operation relatively complex and resulting in lower reliability.

[0005] Chinese Patent 202120457009.0 discloses a leakage current control module with a tripping function, comprising a leakage current detection controller unit and a leakage current tripping execution unit. The leakage current detection controller unit (1) and the leakage current tripping execution unit are integrated. The leakage current control module (M1) is installed inside the circuit breaker base (A), above the circuit breaker shaft and the current transformer, at the rear end of the arc-extinguishing chamber. Improvements to the related structures of the leakage current detection controller unit and the leakage current tripping execution unit reduce installation difficulty. The electrical clearances between components meet the operating conditions in humid environments, and the output port configuration is easy to install. This patented technology includes a physical power-off structure on the circuit board, which fulfills the function of disconnecting the circuit board from the main circuit system, facilitating high withstand voltage testing of structures outside the circuit board. However, this technology uses an encapsulated switch on the circuit board for isolation, which is a hard contact isolation; without overtravel, the reliability of the contact cannot be guaranteed. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing withstand voltage testing isolation structures for intelligent circuit breaker controllers by providing a new withstand voltage testing isolation structure for intelligent circuit breaker controllers. This new structure features a rotating design, which is not only simple to operate but also achieves effective isolation and contact. Withstand voltage testing of the main circuit outside the controller can be performed without disassembling the controller.

[0007] Technical solution

[0008] To achieve the above technical objectives, the present invention provides an intelligent circuit breaker controller withstand voltage detection isolation structure, characterized in that: it includes a knob, which is installed in the mounting slot of the middle cover and can rotate; the knob can be linked with a push rod during rotation; the push rod is equipped with a return spring; the push rod can move up and down under the action of the knob and the return spring; the push rod is also equipped with at least one movable contact piece; during the up and down movement of the push rod, it can drive the movable contact piece to contact or separate from the terminal pair on the electronic circuit board; the contact or separation of the movable contact piece and the terminal pair on the electronic circuit board can realize the on / off switching of the controller.

[0009] Furthermore, the knob is provided with a linkage boss, the bottom surface of which is linked to the mushroom-shaped head of the push rod.

[0010] Furthermore, the push rod is located inside the housing, and the mushroom-shaped tip of the push rod protrudes through the through hole in the housing and is linked with the linkage boss on the knob.

[0011] Furthermore, one end of the return spring abuts against the mushroom-shaped head of the push rod, and the other end abuts against the upper surface of the cover to provide a return force to the push rod.

[0012] Furthermore, the bottom surface of the linkage boss on the knob is provided with a spiral inclined surface and a platform surface. When the knob is rotated to different position states, the spiral inclined surface and the platform surface make corresponding contact and linkage with the mushroom rod head of the push rod.

[0013] Furthermore, the knob is provided with a first limiting anti-misalignment part and a second limiting anti-misalignment part on both sides of the linkage boss. During the installation of the knob, the first limiting anti-misalignment part and the second limiting anti-misalignment part can prevent the knob from being installed incorrectly. During the rotation of the knob, the first limiting anti-misalignment part and the second limiting anti-misalignment part are restricted in their rotation range by the limiting surface on the middle cover, thereby displaying the corresponding position status.

[0014] Furthermore, a raised rib is provided on the bottom surface of the linkage boss on one side of the spiral inclined plane to prevent the knob from malfunctioning due to vibration when the controller is turned on.

[0015] Furthermore, the at least one movable contact piece is installed in a corresponding number of slots at the front end of the push rod, or the at least one movable contact piece is riveted to the front end of the push rod.

[0016] Furthermore, the housing is secured to the electronic circuit board in the current transformer assembly by clips thereon.

[0017] Furthermore, the spring terminals are soldered onto the electronic circuit board.

[0018] Furthermore, an interphase insulation guide block is provided on the push rod at the front end of the slot, and an interphase insulation guide groove is provided on the electronic circuit board at a position corresponding to the interphase insulation guide block.

[0019] Beneficial effects

[0020] This invention provides an intelligent circuit breaker controller withstand voltage detection isolation structure. Isolation and contact of the controller can be achieved by rotating a knob 90 degrees forward and backward. The spring terminals provide a certain overtravel to ensure reliable contact. The entire circuit breaker withstand voltage detection isolation structure is not only simple to operate but also achieves effective isolation and contact. Withstand voltage testing of the main circuit outside the controller can be performed without disassembling the controller. Attached Figure Description

[0021] Appendix Figure 1a This is a product diagram of the intelligent circuit breaker controller in an embodiment of the present invention;

[0022] Appendix Figure 1b Yes, it is attached. Figure 1a Enlarged view of section I in the middle.

[0023] Appendix Figure 1c This is a diagram showing the position of the linkage boss when it is in the ON state in an embodiment of the present invention;

[0024] Appendix Figure 1d This is a diagram showing the position of the linkage boss when it is in the test state in an embodiment of the present invention;

[0025] Appendix Figure 2 This is a schematic diagram of the installation position of the pressure resistance detection isolation structure in an embodiment of the present invention;

[0026] Appendix Figure 3 This is a schematic diagram of the knob installation position in an embodiment of the present invention;

[0027] Appendix Figure 4a This is a schematic diagram of the withstand voltage detection structure in the ON position in an embodiment of the present invention.

[0028] Appendix Figure 4b It is attached Figure 4a Enlarged view of point A in the middle.

[0029] Appendix Figure 5a This is a schematic diagram of the pressure resistance testing structure in the test position in an embodiment of the present invention.

[0030] Appendix Figure 5b It is attached Figure 5a Enlarged view of section B in the middle.

[0031] Appendix Figure 6a This is a schematic diagram of the installation structure of the push rod and the stationary contact piece using a slot method in an embodiment of the present invention.

[0032] Appendix Figure 6b This is a schematic diagram of the push rod and the stationary contact piece being installed by riveting in an embodiment of the present invention.

[0033] Appendix Figure 7 This is a schematic diagram of the structure of the cover in an embodiment of the present invention.

[0034] Appendix Figure 8 This is a schematic diagram of the knob in an embodiment of the present invention. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "inner," "outer," "front," "rear," "left," "right," "usual side," and "spare side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0039] Example

[0040] As attached Figure 1a As shown in Figures 1b, 2, and 3, a withstand voltage detection isolation structure for an intelligent circuit breaker controller is disclosed. The circuit breaker includes a base 10, a middle cover 2, a current transformer assembly 9, and a controller assembly 11. The withstand voltage detection isolation structure includes a knob 1, which is rotatable and mounted in a mounting slot 201 in the middle cover 2. During rotation, the knob 1 can be linked with a push rod 3. In this embodiment, as shown in the attached figure... Figure 8 As shown, the knob 1 is provided with a linkage boss 1a, the bottom surface of which is linked with the mushroom-shaped rod head 301 of the push rod 3. The bottom surface of the linkage boss 1a on the knob 1 is provided with a spiral inclined surface 101 and a platform surface 102. When the knob 1 is rotated to different positions, the spiral inclined surface 101 and the platform surface 102 contact and link with the mushroom-shaped rod head 301 of the push rod 3 accordingly. Limiting anti-misalignment part one 103 and limiting anti-misalignment part two 104 are provided on both sides of the linkage boss 1a on the knob 1. Specifically, during the installation of the knob 1, the limiting anti-misalignment part one 103 and the limiting anti-misalignment part two 104 can only be installed according to the shape of the mounting slot 201, thereby avoiding incorrect installation of the knob 1. During the rotation of the knob 1, the limiting anti-misalignment part one 103 and the limiting anti-misalignment part two 104 are restricted in their rotation range by the limiting surface 202 on the middle cover 2, thus displaying the corresponding position state. Specifically, as shown in the attached document. Figure 1c and 1dAs shown, during the rotation of the knob 1, the second anti-misoperation part 104 and the first anti-misoperation part 103 will contact the limiting surface 202 at the corresponding on or test position, thus limiting the rotation stroke. Therefore, the knob 1 can only display the on or test position within a limited range. A raised rib 105 is provided on the bottom surface of the linkage boss 1a on one side of the spiral inclined surface 101 to prevent the knob 1 from malfunctioning due to vibration when the controller is turned on.

[0041] The push rod 3 is equipped with a return spring 4. The push rod 3 can move up and down under the action of the knob 1 and the return spring 4. In this embodiment, the push rod 3 is located inside the cover 8, and the mushroom-shaped rod head 301 of the push rod 3 extends from the attached... Figure 7 The cover 8 extends through the through hole 801 and is linked to the linkage boss 1a on the knob 1. One end of the return spring 4 abuts against the mushroom rod head 301 of the push rod 3, and the other end abuts against the step 803 in the through hole 801 on the upper surface of the cover 8 to provide a return force to the push rod 3.

[0042] The push rod 3 is also equipped with at least one movable contact piece 5. During the up-and-down movement of the push rod 3, the movable contact piece 5 can contact or separate from the wiring terminals 7, 7' on the electronic circuit board 6. The contact or separation of the movable contact piece 5 and the wiring terminals 7, 7' on the electronic circuit board 6 enables the on / off switching of the controller. Specifically, the number of movable contact pieces 5 on the push rod 3 can be determined according to the number of poles of the circuit breaker that the controller needs to connect or disconnect; as shown in the attached figure. Figure 6a As shown, at least one movable contact piece 5 is installed in a corresponding number of slots 302 at the front end of the push rod 3, or, as shown in the attached diagram. Figure 6b As shown, at least one movable contact piece 5 is riveted to the front end of the push rod 5. In this embodiment, the spring terminals 7, 7' are welded to the electronic circuit board. An interphase insulation guide block 303 is provided on the push rod 3 at the front end of the slot 302, and an interphase insulation guide groove is provided on the electronic circuit board 6 at a position corresponding to the interphase insulation guide block 303, which can guide the push rod 3 while achieving interphase insulation isolation.

[0043] After the moving contact 5, push rod 3, reset spring 4, and cover 8 are assembled in the above manner, the cover 8 is fixed to the electronic circuit board 6 in the current transformer assembly 9 by the buckle 802 on it.

[0044] The working principle of this embodiment is as follows: (see attached) Figure 4a and 4bAs shown, the pressure-resistant test isolation structure is in the "on" working position. When knob 1 rotates from the "test" position to the "on" position, the spiral ramp 101 pushes the push rod 3 downwards. When knob 1 is rotated until the mushroom-shaped rod head 301 passes the protruding rib 105 and rotates to the "on" position, the platform surface 102 of knob 1 presses against the push rod 3, causing the moving contact piece 5 to press against the spring terminals 7, 7'. At this time, the deformation of the spring terminals 7, 7' ensures the overtravel movement of knob 1, making the contact more reliable. At this time, the mushroom-shaped rod head 301 presses against the platform surface 102. When vibrating, because the protruding rib 105 is blocked by the mushroom-shaped rod head 301, knob 1 cannot rotate to the left, preventing the mushroom-shaped rod head 301 from moving upwards and causing the moving contact piece 5 and the terminal pairs 7, 7' to disconnect, resulting in malfunction.

[0045] As attached Figure 5a and 5b As shown, when a withstand voltage test is required, the rotary knob 1 is rotated from the "on" position to the "test" position. During the rotation of the knob 1, when the push rod 3 passes the protruding rib 105 of the knob 1, the push rod 3 will move upward under the action of the return spring 4. At this time, the moving contact piece 5 moves away from the spring terminal pair 7, 7', forming an isolation break, and finally realizing the isolation of the controller.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A withstand voltage detection isolation structure for an intelligent circuit breaker controller, characterized in that... It includes a knob (1), which is installed in the mounting slot (201) of the middle cover (2) and can rotate. During the rotation of the knob (1), it can be linked with the push rod (3). The push rod (3) is equipped with a return spring (4). The push rod (3) can move up and down under the action of the knob (1) and the return spring (4). The push rod (3) is also equipped with at least one movable contact piece (5). During the up and down movement of the push rod (3), it can drive the movable contact piece (5) to contact or separate from the terminal pair (7, 7') on the electronic circuit board (6). The contact or separation of the movable contact piece (5) and the terminal pair (7, 7') on the electronic circuit board (6) can realize the on / off of the controller. The knob (1) is provided with a linkage boss (1a). The bottom surface of the linkage boss (1a) is linked with the mushroom rod head (301) of the push rod (3). The bottom surface of the linkage boss (1a) on the knob (1) is provided with a spiral inclined surface (101) and a platform surface (102). When the knob (1) is rotated to different positions, the spiral inclined surface (101) and the platform surface (102) are in contact with the mushroom rod head (301) of the push rod (3).

2. The intelligent circuit breaker controller withstand voltage detection isolation structure as described in claim 1, characterized in that... The push rod (3) is located inside the cover (8), and the mushroom rod head (301) of the push rod (3) passes through the through hole (801) of the cover (8) and is linked with the linkage boss (1a) on the knob (1).

3. The intelligent circuit breaker controller withstand voltage detection isolation structure as described in claim 1, characterized in that... The return spring (4) abuts against the mushroom rod head (301) of the push rod (3) at one end and against the upper surface of the cover (8) at the other end to provide a return force to the push rod (3).

4. The intelligent circuit breaker controller withstand voltage detection isolation structure as described in claim 1 or 2, characterized in that... The knob (1) is provided with a first limiting anti-misalignment part (103) and a second limiting anti-misalignment part (104) on both sides of the linkage boss (1a). During the installation of the knob (1), the first limiting anti-misalignment part (103) and the second limiting anti-misalignment part (104) can prevent the knob (1) from being installed incorrectly. During the rotation of the knob (1), the first limiting anti-misalignment part (103) and the second limiting anti-misalignment part (104) are restricted in their rotation range by the limiting surface (202) on the middle cover (2) to display the corresponding position status.

5. The intelligent circuit breaker controller withstand voltage detection isolation structure as described in claim 1, characterized in that... The bottom surface of the linkage boss (1a) is provided with a raised rib (105) on one side of the spiral inclined surface (101) to prevent the knob (1) from malfunctioning due to vibration when the controller is turned on.

6. The intelligent circuit breaker controller withstand voltage detection isolation structure as described in claim 1, characterized in that... The at least one movable contact piece (5) is installed in a corresponding number of slots (302) at the front end of the push rod (3) or the at least one movable contact piece (5) is riveted to the front end of the push rod (3).

7. The intelligent circuit breaker controller withstand voltage detection isolation structure as described in claim 2, characterized in that... The cover (8) is fixed to the electronic circuit board (6) in the transformer assembly (9) by the buckle (802) thereon.

8. The intelligent circuit breaker controller withstand voltage detection isolation structure as described in claim 1, characterized in that... The spring terminal pair (7, 7') is soldered onto the electronic circuit board.

9. The intelligent circuit breaker controller withstand voltage detection isolation structure as described in claim 6, characterized in that... The push rod (3) is provided with an interphase insulation guide block (303) at the front end of the slot (302), and the electronic circuit board (6) is provided with an interphase insulation guide groove at the corresponding position of the interphase insulation guide block (303).

Images