Interlocking structure and isolation circuit breaker

Abstract

The utility model provides an interlocking structure and an isolation circuit breaker. The interlocking structure comprises a limiting crank arm and an interlocking stop block which are arranged separately. The limiting crank arm comprises a limiting arm and a crank arm, the crank arm is vertically arranged at one end of the limiting arm and is connected with the limiting arm into a whole, and one end, far away from the crank arm, of the limiting arm is transversely arranged in front of the operating contact; when the isolation operation handle is inserted, the limiting arm can be touched and pressed by the isolation operation handle to rotationally leave the butt joint position of the handle and the operation contact; and the interlocking stop block rotatably enters the rotation path of the crank arm and limits the rotation of the limiting crank arm. Interlocking is achieved through mutual cooperation of the limiting crank arm and the interlocking stop block, isolation can be operated only when the isolation circuit breaker is switched off, isolation cannot be operated when the isolation circuit breaker is switched on, and the isolation operation safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of high voltage switchgear technology, and more specifically, to an interlocking structure and an isolating circuit breaker. Background Technology

[0002] The longitudinal rotating isolating circuit breaker integrates a high-voltage vacuum circuit breaker and a high-voltage disconnecting switch. It uses a circuit-breaking operating mechanism to drive the moving contacts of the vacuum interrupter within the three-phase poles to open and close the circuit, and an isolating operating mechanism to achieve the isolation function by longitudinally rotating the three-phase poles. To prevent operator error and electric shock accidents, and to improve the safety of isolation operation, the longitudinal rotating isolating circuit breaker is equipped with an interlocking device. The disconnecting switch can only be operated when the intermediate door (the door corresponding to the handcart position) of the longitudinal rotating isolating circuit breaker is closed. That is, the isolating operating handle can only be inserted and connected to the operating contacts on the forward and reverse motors after the intermediate door is closed, controlling the forward and reverse motors for isolation function control. Currently, the interlocking device structure in the longitudinal rotating isolating circuit breaker is relatively complex, occupies a large installation space, and results in a large size of the switchgear. Utility Model Content

[0003] The purpose of this utility model is to provide an interlocking structure with a simple structure, small installation space and small movement space, and an isolation circuit breaker that uses this interlocking structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides an interlocking structure for installation in the operating mechanism of an isolating circuit breaker, near the operating contacts of the forward and reverse motor in the operating mechanism. The operating contacts can be inserted into the isolating operating handle to perform isolation operations. The interlocking structure includes a separately configured limiting crank arm and an interlocking stop block. The limiting crank arm includes a limiting arm and a crank arm. The crank arm is erected at one end of the limiting arm and is connected to the limiting arm as a whole. The end of the limiting arm away from the crank arm is horizontally positioned in front of the operating contact. When the isolating operating handle is inserted, the limiting arm can be pressed and rotated by the isolating operating handle to allow the handle to dock with the operating contact. The interlocking stop block can rotatably enter the rotation path of the crank arm and restrict the rotation of the limiting crank arm.

[0006] In one embodiment, the interlocking stop block is used to connect with the opening and closing mechanism inside the isolating circuit breaker via a linkage mechanism. When the isolating circuit breaker is closed, it stops on one side of the crank arm. When the isolating circuit breaker is opened, it rotates away from the crank arm and its rotation path separates from the crank arm.

[0007] In one embodiment, the interlocking structure further includes a mounting base, which includes a mounting plate and a fixing plate formed by bending the mounting plate. The fixing plate is used to connect to the frame in the operating mechanism, and the limiting arm is rotatably mounted on the mounting plate via a pivot.

[0008] In one embodiment, the interlocking structure further includes a return spring, one end of which is connected to the limit arm and the other end of which is connected to the mounting plate, for driving the limit arm to return to a horizontal position in front of the operating contact when the force exerted by the isolation operating handle on the limit arm is removed.

[0009] In one embodiment, the interlocking structure further includes a limiting post inserted into the mounting base; the limiting arm is provided with a first shaft hole and a limiting groove, the first shaft hole is provided at one end of the limiting arm near the crank arm, the limiting groove is provided on the side of the first shaft hole near the crank arm, and the limiting post abuts against the inner side of the limiting groove.

[0010] In one embodiment, a spring mounting hole is provided between the first shaft hole and the crank arm, and the spring mounting hole is located near the limiting groove and away from the first shaft hole; the mounting plate has a second shaft hole and a spring connecting hole, the second shaft hole is located at the position corresponding to the first shaft hole and is used to rotatably mount the limiting crank arm on the mounting plate by passing a rotating shaft through the first and second shaft holes, and the spring connecting hole and the spring mounting hole are respectively located on both sides of the limiting post; the reset spring is a tension spring, one end of the tension spring is hooked on the spring mounting hole, and the other end of the tension spring is hooked on the spring connecting hole.

[0011] In one embodiment, the mounting plate has a clearance notch corresponding to the housing of the forward and reverse motor, and a limit post fixing hole is formed near the clearance notch, with the limit post inserted into the limit post fixing hole.

[0012] In one embodiment, the limiting crank arm and the interlocking block are configured such that the limiting crank arm rotates horizontally and the interlocking block rotates vertically.

[0013] In one embodiment, in the projection on the mounting plate, the width of the interlocking stop is greater than the thickness of the crank arm, and it protrudes from the side of the crank arm away from the limiting arm.

[0014] As a second aspect, the present invention also provides an isolation circuit breaker, including an operating mechanism, a closing mechanism and the above-mentioned interlocking structure. The operating mechanism includes a forward and reverse motor with an operating contact, the limiting arm is horizontally rotatably arranged in front of the operating contact, and the interlocking block is connected to the closing mechanism.

[0015] The beneficial effects of the technical solution provided by this utility model are as follows: The interlocking structure of this utility model achieves interlocking by setting a limiting crank arm and an interlocking stop block in cooperation with each other. The limiting arm of the limiting crank arm can be horizontally set in front of the operating contact of the forward and reverse motor, and the interlocking stop block blocks one side of the crank arm to restrict the rotation of the limiting arm, thereby preventing the isolating operating handle from entering the position of docking with the operating contact. Alternatively, when the interlocking stop block and the crank arm are separated, the limiting arm can rotate to expose the docking position under the pushing action of the isolating operating handle. Thus, the isolating can only be operated when the isolating circuit breaker is open, and cannot be operated when the circuit breaker is closed, thereby improving the safety of the isolating operation.

[0016] Among them, the limit crank moves horizontally and the interlocking block moves vertically. The interlocking structure is simple and ingenious, with small installation and movement space, which is conducive to the miniaturization of the isolation circuit breaker. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the interlocking structure provided in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a limiting crank arm provided in one embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a mounting base provided in one embodiment of the present utility model;

[0021] Figure 4 for Figure 1 The diagram shown illustrates the interlocking structure in the closed state of the isolating circuit breaker. Detailed Implementation

[0022] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0023] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0024] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0025] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0026] This utility model relates to an isolating operating handle limiting mechanism, which is installed in the operating mechanism of an isolating circuit breaker. At least part of its structure is positioned horizontally in front of the operating contacts on the forward and reverse motor. When the isolating circuit breaker is closed, it can prevent the isolating operating handle from entering the position where it connects with the operating contacts, thus blocking the connection between the isolating operating handle and the operating contacts on the forward and reverse motor in the operating mechanism. When the isolating circuit breaker is open, it allows the entry channel of the isolating operating handle to connect with the operating contacts, thereby changing the direction of the forward and reverse motor by rotating the operating contacts on the motor through the isolating operating handle, so that the three-phase poles of the circuit breaker work in the isolating position or the circuit-connecting position, thereby improving the safety of the isolating operation of the isolating circuit breaker.

[0027] See Figures 1 to 4 The interlocking structure 100 includes a limiting crank arm 10, an interlocking block 20, and a mounting base 30. The mounting base 30 is used to install onto the frame of the operating mechanism. The limiting crank arm 10 is rotatably mounted on the mounting base 30. The interlocking block 20 is located above the limiting crank arm 10 and can rotatably enter the rotation path of the limiting crank arm 10 to restrict the rotation of the limiting crank arm 10.

[0028] Please combine Figure 3 In one embodiment, the mounting base 30 includes a mounting plate 31 and a fixing plate 32 formed by bending the mounting plate 31. The fixing plate 32 is provided with a mounting base fixing hole 321 for connecting the mounting plate 31 to the frame in the operating mechanism.

[0029] Please combine Figure 2The limiting arm 10 includes a limiting arm 11 and a crank arm 12. The limiting arm 11 is rotatably mounted on the mounting base 30 in a manner generally parallel to the mounting plate 31. The crank arm 12 is integrally formed with the limiting arm 11 at one end and stands vertically on the limiting arm 11. Optionally, the crank arm 12 and the limiting arm 11 are formed by bending an upward-pointing rod-like member.

[0030] The limiting arm 11, with one end away from the crank arm 12, is positioned horizontally in front of the operating contact 210. Under the action of an external force (such as the pushing force of the operating handle), it can rotate away from the front of the operating contact 210, exposing the operating contact 210. This allows the isolation operating handle to be inserted into the operating contact 210 and rotated, thereby operating the isolation of the circuit breaker.

[0031] The limiting arm 11 has a first shaft hole 13, and the mounting plate 31 has a second shaft hole 311 corresponding to the first shaft hole 13, so that the limiting arm 11 can be rotatably mounted on the mounting plate 31 by passing the rotating shaft through the first shaft hole 13 and the second shaft hole 311.

[0032] The interlocking block 20 is configured to rotate vertically, and can rotate into the rotation path of the crank arm 12 to block the rotation of the limiting arm 11 on one side of the crank arm 12, or the interlocking block 20 can rotate away from the rotation path of the crank arm 12, separate from the crank arm 12, and release the restriction on the rotation of the limiting arm 11.

[0033] In one embodiment, in the projection on the mounting plate 31, the width of the interlocking stop 20 is greater than the thickness of the crank arm 12, and it protrudes from the side of the crank arm 12 away from the limiting arm 11, ensuring that the interlocking stop can block the crank arm 12 and improve the reliability of the interlocking function of the interlocking structure.

[0034] In one embodiment, the interlocking stop 20 is used to connect with the opening and closing mechanism inside the isolating circuit breaker via a linkage mechanism. When the isolating circuit breaker is closed, it rotates downward to enter the rotation path of the crank arm 12 and stops on one side of the crank arm 12. When the isolating circuit breaker is opened, it rotates upward to leave the rotation path of the crank arm 12 and separates from the crank arm 12. This allows the interlocking structure 100 to be linked with the opening and closing mechanism, thereby realizing the interlocking function and improving the safety of the isolation operation.

[0035] Please combine Figure 1 The interlocking structure 100 also includes a limiting post 50, which is used to limit the rotation angle of the limiting arm 11, so as to prevent the end of the limiting arm 11 near the crank arm 12 from rotating and touching the housing of the forward and reverse motor, thus preventing damage to the forward and reverse motor.

[0036] Please combine Figure 2The limiting arm 11 is also provided with a limiting groove 15 corresponding to the limiting post 50. The first shaft hole 13 is provided at one end of the limiting arm 11 near the crank arm 12. The limiting groove 15 is provided on the side of the first shaft hole 13 near the crank arm 12. The limiting post 50 abuts against the inner side of the limiting groove 15.

[0037] When the limiting arm 11 rotates to reset in another direction, the end of the limiting arm 11 near the crank arm 12 rotates around the pivot and is blocked by the limiting post 50, thereby limiting the rotation angle of the limiting arm 11 and preventing the motor housing from being damaged by collision.

[0038] Please combine Figure 3 The mounting plate 31 is provided with a clearance notch 313 corresponding to the housing of the forward and reverse motor. The limiting arm 11 is provided with a limiting post fixing hole 314 near the clearance notch 313. The limiting post 50 is inserted into the limiting post fixing hole 314.

[0039] Please combine Figure 1 The interlocking structure 100 also includes a reset spring, which is a tension spring 40. One end of the spring is connected to the mounting plate 31 and the other end is connected to the limiting arm 11. The spring is used to drive the limiting arm 11 to reset and lie horizontally in front of the operating contact 210 after the force exerted by the isolation operating handle on the limiting arm 11 is removed.

[0040] A spring mounting hole 14 is provided between the first shaft hole 13 and the crank arm 12. The spring mounting hole 14 is located near the limiting groove 15 and away from the first shaft hole 13. The mounting plate 31 has a spring connecting hole 312. The spring connecting hole 312 and the spring mounting hole 14 are respectively located on both sides of the limiting post 50. One end of the tension spring 40 is hooked on the spring mounting hole 14, and the other end of the tension spring 40 is hooked on the spring connecting hole 312.

[0041] Secondly, this utility model also provides an isolating circuit breaker, including an operating mechanism, a closing / opening mechanism, and the aforementioned interlocking structure 100. The operating mechanism includes a forward / reverse motor 200 with an operating contact 210. The limiting arm 11 is horizontally rotatably positioned in front of the operating contact 210. The interlocking stop 20 is connected to the closing / opening mechanism via a linkage mechanism 300. Thus, the interlocking stop 20 can be linked to the closing / opening mechanism, causing it to rotate downwards to stop the crank arm 12 during closing, thereby restricting the rotation of the limiting arm 11 and preventing the isolating operating handle from engaging with the operating contact 210. During opening, it rotates upwards to release the restriction on the crank arm 12's rotation, allowing the isolating operating handle to engage with the operating contact 210. In other words, in this utility model's isolating circuit breaker, isolation cannot be operated when the circuit breaker is closed, but can only be operated during opening, improving the safety of the isolation operation.

[0042] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of this utility model that have similar functions.

[0043] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. An interlocking structure for use in the operating mechanism of an isolating circuit breaker, and located near the operating contacts of the forward and reverse motor in the operating mechanism, wherein the operating contacts can be inserted into an isolating operating handle to perform an isolating operation, characterized in that, This includes separately configured limit crank arms and interlocking blocks; The limiting arm includes a limiting arm and a crank arm. The crank arm is erected at one end of the limiting arm and is connected to the limiting arm as a whole. The end of the limiting arm away from the crank arm is placed horizontally in front of the operating contact. The limiting arm can be rotated by the isolation operating handle when the isolation operating handle is inserted to make way for the docking position between the handle and the operating contact. The interlocking stop can rotatably enter the rotation path of the crank arm and restrict the rotation of the limiting crank arm.

2. The interlocking structure according to claim 1, characterized in that, The interlocking stop block is used to connect with the opening and closing mechanism inside the isolating circuit breaker through a linkage mechanism. When the isolating circuit breaker is closed, it stops on one side of the crank arm. When the isolating circuit breaker is opened, it rotates away from the crank arm and its rotation path separates from the crank arm.

3. The interlocking structure according to claim 1, characterized in that, It also includes a mounting base, which includes a mounting plate and a fixing plate formed by bending the mounting plate. The fixing plate is used to connect to the frame inside the operating mechanism. The limiting arm is rotatably mounted on the mounting plate via a pivot.

4. The interlocking structure according to claim 3, characterized in that, It also includes a return spring, one end of which is connected to the limit arm and the other end is connected to the mounting plate, for driving the limit arm to return to a horizontal position in front of the operating contact when the force exerted by the isolation operating handle on the limit arm is removed.

5. The interlocking structure according to claim 4, characterized in that, It also includes a limiting post inserted into the mounting base; The limiting arm is provided with a first shaft hole and a limiting groove. The first shaft hole is located at one end of the limiting arm near the crank arm, and the limiting groove is located on the side of the first shaft hole near the crank arm. The limiting post abuts against the inside of the limiting groove.

6. The interlocking structure according to claim 5, characterized in that, A spring mounting hole is provided between the first shaft hole and the crank arm, and the spring mounting hole is located near the limiting groove and away from the first shaft hole. The mounting plate has a second shaft hole and a spring connecting hole. The second shaft hole is located at the position corresponding to the first shaft hole and is used to rotatably mount the limiting crank arm on the mounting plate by passing a rotating shaft through the first and second shaft holes. The spring connecting hole and the spring mounting hole are located on both sides of the limiting post. The reset spring is a tension spring, with one end hooked onto the spring mounting hole and the other end hooked onto the spring connection hole.

7. The interlocking structure according to claim 6, characterized in that, The mounting plate has a clearance notch corresponding to the housing of the forward and reverse motor, and a limit post fixing hole is provided near the clearance notch. The limit post is inserted into the limit post fixing hole.

8. The interlocking structure according to claim 3, characterized in that, The limiting crank arm and the interlocking block are configured such that the limiting crank arm rotates in the horizontal direction and the interlocking block rotates in the vertical direction.

9. The interlocking structure according to claim 8, characterized in that, In the projection on the mounting plate, the width of the interlocking stop is greater than the thickness of the crank arm, and it protrudes from the side of the crank arm away from the limiting arm.

10. An isolating circuit breaker, comprising an operating mechanism and a closing / opening mechanism, wherein the operating mechanism includes a forward and reverse rotating motor having operating contacts, characterized in that, It also includes the interlocking structure of any one of claims 1 to 9, wherein the limiting arm is horizontally rotatable in front of the operating contact, and the interlocking block is connected to the opening and closing mechanism.

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