A high-voltage circuit breaker with an insulating pull rod stroke adjusting structure

Abstract

The utility model relates to high -voltage electrical equipment field discloses a kind of high-voltage circuit breaker with insulating pull rod stroke adjusting structure, including circuit breaker shell and operating assembly, the inner chamber of circuit breaker shell is rotatably connected with insulating rod, the left and right sides of insulating rod protruding circuit breaker shell outside are fixedly connected with convex point, the operating assembly includes connecting rod, driving rod and screw rod, the connecting rod is hinged in the rear wall of the inner chamber of circuit breaker shell by rotating seat, the end of the connecting rod away from the rear wall of the inner chamber of circuit breaker shell is hinged with the middle part of insulating rod.In the utility model, by setting the adjusting mechanism consisting of screw rod, briquetting, elastic member and sliding block etc., the fine adjustment to insulating pull rod stroke is realized, operating personnel changes the initial state of transmission system by rotating control member, without power-off or disassembling any component of circuit breaker, improve maintenance efficiency and adjustment accuracy, reduce maintenance threshold and time cost.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage electrical equipment, and in particular to a high-voltage circuit breaker with an insulating pull rod stroke adjustment structure. Background Technology

[0002] High-voltage circuit breakers are crucial control and protection devices in power systems, and their breaking performance directly affects the safe and stable operation of the power grid. The insulating tie rod, as the core transmission component in the circuit breaker's operating mechanism, bears the critical task of transmitting operating force to the moving contacts of the arc-extinguishing chamber. Its effective stroke (usually expressed as a rotation angle) directly determines key mechanical parameters such as the final opening distance between the moving and stationary contacts and the contact pressure (overtravel). The accuracy of these parameters has a significant impact on ensuring the reliable breaking, insulation strength, and electrical life of the circuit breaker.

[0003] Currently, the adjustment and correction of the travel of insulating tie rods usually relies on periodic power outages for maintenance. During adjustment, professional personnel are required to use special tools to achieve this by replacing insulating tie rods of different lengths, adding or removing shims at connection points, or adjusting the length of the connecting rods inside the operating mechanism. However, the operation process is cumbersome, requires highly skilled personnel, and the adjustment accuracy is difficult to guarantee. Moreover, it must be done during a power outage, making it impossible to achieve fast and accurate online adjustment and failing to meet the needs of smart grids for precise control and rapid maintenance of equipment status. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a high-voltage circuit breaker with an insulating pull rod stroke adjustment structure, which aims to solve the problem in the prior art that "the adjustment and correction of the insulating pull rod stroke must be carried out by power outage operation".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-voltage circuit breaker with an adjustable insulating rod stroke structure, comprising a circuit breaker housing and an operating assembly. An insulating rod is rotatably connected to the inner cavity of the circuit breaker housing. Protrusions are fixedly connected to the left and right sides of the insulating rod extending outside the circuit breaker housing. The operating assembly includes a connecting rod, a driving rod, and a screw. The connecting rod is hinged to the rear wall of the inner cavity of the circuit breaker housing via a rotating seat. One end of the connecting rod away from the rear wall of the inner cavity of the circuit breaker housing is hinged to the middle of the insulating rod. One end of the driving rod is hinged to the middle of the connecting rod. A sliding block is hinged to the other end of the driving rod. The sliding block is slidably connected up and down in the inner cavity of the circuit breaker housing. A pressure block is elastically connected to the top of the sliding block via an elastic element. The pressure block is slidably connected up and down in the inner cavity of the circuit breaker housing. The screw is threadedly connected to the inner wall of the circuit breaker housing. The bottom of the screw is rotatably connected to the top of the pressure block. A control element is fixedly connected to the top of the screw.

[0006] As a further description of the above technical solution:

[0007] The circuit breaker housing has multiple arrayed wiring slots on its front side, and an emergency stop button is located at the bottom of the front side of the circuit breaker housing.

[0008] As a further description of the above technical solution:

[0009] An inspection port is provided at the bottom front of the circuit breaker housing.

[0010] As a further description of the above technical solution:

[0011] Mounting wings are fixedly connected to the left and right sides of the circuit breaker housing near the rear edge, and mounting holes are provided on the surface of the mounting wings.

[0012] As a further description of the above technical solution:

[0013] The circuit breaker housing has integrally formed side plates fixedly connected to its left and right sides.

[0014] As a further description of the above technical solution:

[0015] The length of the drive rod is equal to half the length of the connecting rod.

[0016] As a further description of the above technical solution:

[0017] The elastic element is an elastic return spring. The top end of the elastic element is connected to the bottom of the pressure block, and the bottom end of the elastic element is connected to the top of the sliding block.

[0018] As a further description of the above technical solution:

[0019] The control component is a knob with anti-slip texture on its circumferential surface. The control component is fixedly connected to the top of the circuit breaker housing at the extension of the screw and is coaxial with the screw.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by setting an adjustment mechanism consisting of a screw, a pressure block, an elastic element, and a sliding block, the stroke of the insulating pull rod can be finely adjusted. Maintenance personnel can change the initial state of the transmission system by rotating the control component without power outage or disassembling any part of the circuit breaker, thereby improving maintenance efficiency and adjustment accuracy, and reducing maintenance threshold and time cost.

[0022] 2. In this utility model, the small linear displacement of the screw is amplified and converted into the angular displacement change of the insulating tie rod by the cooperation of the connecting rod, the driving rod and the elastic preload. The adjustment sensitivity is high and the response linearity is good. The whole structure is compact and completely built into the circuit breaker housing. It does not change the external contour and installation size of the circuit breaker. It has strong versatility and improves the long-term stability and reliability of the mechanical characteristics of the circuit breaker. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0024] Figure 2 This is a three-dimensional cross-sectional view of the overall device in this utility model;

[0025] Figure 3 This utility model Figure 1 An enlarged 3D structural diagram at point A in the middle;

[0026] Figure 4 This utility model Figure 2 Enlarged 3D structural diagram at point B.

[0027] Legend:

[0028] 11. Circuit breaker housing; 12. Wiring slot; 13. Emergency stop button; 14. Inspection port; 15. Mounting wing; 16. Mounting hole; 17. Side plate; 21. Insulating rod; 22. Protrusion; 3. Operating components; 31. Connecting rod; 32. Rotating seat; 33. Drive rod; 34. Sliding block; 35. Elastic element; 36. Pressure block; 37. Screw; 38. Control component. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1 and Figure 2This utility model provides an embodiment of a high-voltage circuit breaker with an adjustable insulating pull rod stroke structure, comprising a circuit breaker housing 11 and an operating assembly 3. The front of the circuit breaker housing 11 has multiple arrayed wiring slots 12 for connecting and fixing external cables. An emergency stop button 13 is located at the bottom of the front of the circuit breaker housing 11 for quickly cutting off the control circuit in abnormal situations to achieve emergency tripping. An inspection port 14 is located at the bottom of the front of the circuit breaker housing 11, equipped with a removable sealing cover for observing the internal operating status. Mounting wings 15 are fixedly connected to the left and right sides of the circuit breaker housing 11 near the rear edge. Mounting holes 16 are provided on the surface of the mounting wings 15 for fixing the circuit breaker as a whole to a switch cabinet or bracket. Integrated side plates 17 are fixedly connected to the left and right sides of the circuit breaker housing 11 to enhance the structural strength of the housing and serve as the mounting base for the external insulating pull rod guide or protective structure.

[0031] Reference Figure 2 - Figure 3 An insulating rod 21 is rotatably connected to the inner cavity of the circuit breaker housing 11. The insulating rod 21 extends out of the circuit breaker housing 11 and is fixedly connected to the left and right sides with protrusions 22 for connecting to the external operating mechanism, facilitating manual operation. The operating component 3 includes a connecting rod 31, a driving rod 33, and a screw 37. The connecting rod 31 is hinged to the rear wall of the inner cavity of the circuit breaker housing 11 through a rotating seat 32. One end of the connecting rod 31 away from the rear wall of the inner cavity of the circuit breaker housing 11 is hinged to the middle of the insulating rod 21. One end of the driving rod 33 is hinged to the middle of the connecting rod 31, and the other end of the driving rod 33 is hinged to a sliding block 34. The length of the driving rod 33 is equal to half the length of the connecting rod 31 to ensure a sufficient leverage ratio in a limited space, so that a small vertical displacement is converted into a significant axial adjustment of the insulating rod 21. The sliding block 34 is slidably connected to the inner cavity of the circuit breaker housing 11. The axial position of the insulating rod 21 is adjusted by changing the initial tilt angle of the connecting rod 31.

[0032] Reference Figure 2 - Figure 3The top of the sliding block 34 is elastically connected to the pressure block 36 via an elastic element 35. The elastic element 35 is an elastic return spring. The top end of the elastic element 35 is connected to the bottom of the pressure block 36, and the bottom end of the elastic element 35 is connected to the top of the sliding block 34. The pressure block 36 is slidably connected to the inner cavity of the circuit breaker housing 11. The screw 37 is threadedly connected to the inner wall of the circuit breaker housing 11. By rotating the screw 37, the preload of the pressure block 36 on the sliding block 34 is adjusted, thereby changing the initial position of the insulating rod 21 and achieving fine adjustment of the effective stroke of the insulating rod 21. The bottom of the screw 37 is rotatably connected to the top of the pressure block 36, and the top of the screw 37 is fixedly connected to a control element 38. The screw 37 is rotated to drive the circuit breaker. The pressure block 36 moves vertically, thereby changing the pre-compression of the elastic element 35 to adjust the rotation stroke of the insulating rod 21. The control element 38 is a knob with anti-slip texture on its circumferential surface. The control element 38 is fixedly connected to the top of the screw 37 extending to the circuit breaker housing 11 and is coaxial with the screw 37. When the control element 38 is rotated to feed the screw 37 downward, the pressure block 36 is pushed by the screw 37 to compress the elastic element 35 and move downward, thereby pushing the sliding block 34 downward. The drive rod 33 pulls the connecting rod 31 to rotate around its hinge point with the rotating seat 32, causing the connecting rod 31 to drive the insulating rod 21 to generate axial displacement, thereby adjusting its relative position extending from both ends of the circuit breaker housing 11.

[0033] Working principle: When in use, with the circuit breaker in the normal open or closed position, the operating mechanism is in a stable state. At this time, the elastic element 35 has a certain initial pre-compression. This pre-compression force is transmitted to the connecting rod 31 through the sliding block 34 and the drive rod 33, so that the insulating rod 21 is kept in a certain initial angle position. When it is necessary to adjust the stroke of the insulating rod 21, the operator can operate by rotating the control element 38.

[0034] When the stroke needs to be increased, the rotating control component 38 drives the adjusting screw 37 to screw downwards. The bottom end of the adjusting screw 37 pushes the pressure block 36 downwards, further compressing the elastic element 35. The increased reaction force generated by the compressed elastic element 35 is transmitted downwards to the sliding block 34, causing the sliding block 34 to slide downwards along the guide rail. The driving rod 33 pulls the connecting rod 31 to rotate around the hinge point where it connects to the rotating seat 32. Since the middle part of the connecting rod 31 is hinged to the insulating rod 21, the insulating rod 21 rotates around its own axis, thereby finely adjusting its angular position relative to the circuit breaker housing 11. This changes the starting point of the insulating rod 21 before the action, so that the effective working stroke of the insulating rod 21 can be increased without changing the output displacement.

[0035] When a reduction in stroke is required, the adjusting screw 37 is disengaged upward by rotating the control component 38 in the opposite direction, thereby reducing the pressure on the pressure block 36. At this time, under the pre-pressure of the elastic component 35, the pressure block 36 and the sliding block 34 move upward as a whole. The upward movement of the sliding block 34 drives the connecting rod 31 to rotate in the opposite direction through the drive rod 33, thereby driving the insulating rod 21 to finely adjust its angular position in the opposite direction, ultimately reducing its effective working stroke. After adjusting to the required stroke, due to the self-locking property of the adjusting screw 37 and the outer shell threaded engagement, the entire device will remain in a stable working state. During normal opening and closing operations, the external operating mechanism drives the insulating rod 21 to move axially through the protrusion 22, and transmits power through the connecting rod 31 to complete the circuit opening and closing without affecting the normal dynamic performance of the circuit breaker.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-voltage circuit breaker with an insulated pull rod travel adjustment structure, comprising a circuit breaker housing (11) and an operating assembly (3), characterized in that: An insulating rod (21) is rotatably connected to the inner cavity of the circuit breaker housing (11). The insulating rod (21) extends outward from the circuit breaker housing (11) and is fixedly connected to protrusions (22) on its left and right sides. The operating assembly (3) includes a connecting rod (31), a driving rod (33), and a screw (37). The connecting rod (31) is hinged to the rear wall of the inner cavity of the circuit breaker housing (11) via a rotating seat (32). One end of the connecting rod (31) away from the rear wall of the inner cavity of the circuit breaker housing (11) is hinged to the middle of the insulating rod (21). One end of the driving rod (33) is hinged to the connecting rod (31). The drive rod (33) is hinged in the middle, and a sliding block (34) is hinged to the other end of the drive rod (33). The sliding block (34) is slidably connected to the inner cavity of the circuit breaker housing (11). The top of the sliding block (34) is elastically connected to a pressure block (36) through an elastic element (35). The pressure block (36) is slidably connected to the inner cavity of the circuit breaker housing (11). The screw (37) is threadedly connected to the inner wall of the circuit breaker housing (11). The bottom of the screw (37) is rotatably connected to the top of the pressure block (36). The top of the screw (37) is fixedly connected to a control element (38).

2. A high-voltage circuit breaker with an adjustable insulating rod stroke structure according to claim 1, characterized in that: The circuit breaker housing (11) has multiple arrayed wiring slots (12) on its front side, and an emergency stop button (13) is provided at the bottom of the front side of the circuit breaker housing (11).

3. A high-voltage circuit breaker with an adjustable insulating rod stroke structure according to claim 1, characterized in that: An inspection port (14) is provided on the bottom front of the circuit breaker housing (11).

4. A high-voltage circuit breaker with an adjustable insulating rod stroke structure according to claim 1, characterized in that: The left and right sides of the circuit breaker housing (11) near the rear edge are fixedly connected to mounting wings (15), and mounting holes (16) are opened on the surface of the mounting wings (15).

5. A high-voltage circuit breaker with an adjustable insulating rod stroke structure according to claim 1, characterized in that: The circuit breaker housing (11) is fixedly connected to the left and right sides with integrally formed side plates (17).

6. A high-voltage circuit breaker with an adjustable insulating rod stroke structure according to claim 1, characterized in that: The length of the drive rod (33) is equal to half the length of the connecting rod (31).

7. A high-voltage circuit breaker with an adjustable insulating rod stroke structure according to claim 1, characterized in that: The elastic element (35) is an elastic return spring. The top end of the elastic element (35) is connected to the bottom of the pressure block (36), and the bottom end of the elastic element (35) is connected to the top of the sliding block (34).

8. A high-voltage circuit breaker with an adjustable insulating rod stroke structure according to claim 1, characterized in that: The control component (38) is a knob with anti-slip texture on its circumferential surface. The control component (38) is fixedly connected to the top of the screw (37) extending to the circuit breaker housing (11) and is coaxial with the screw (37).

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