Hydraulic circuit breaker with anti-tripping function

Abstract

The utility model discloses a hydraulic circuit breaker with an anti-tripping function, which comprises a hydraulic circuit breaker body, a long arm, a short arm, a fixed bracket, a first shaft, a second shaft, a connecting rod assembly, a connecting spring and a limiting movable plate, and is characterized in that the long arm and the short arm are respectively arranged on an inner side arc-shaped surface of a handle of the hydraulic circuit breaker body; the connecting rod assembly is fixed on the fixing support through a first shaft and a second shaft and connected with a fixing frame of the hydraulic circuit breaker body through a connecting spring, one end of the fixing support is fixed on the fixing frame, and the other end of the fixing support is a cantilever end. The connecting rod assembly can rotate around the first shaft and the second shaft, the limiting movable piece is fixed to the fixing frame and located beside the connecting rod assembly and the fixing support, and a limiting hole used for limiting rotation of the connecting rod assembly is formed in the limiting movable piece. According to the utility model, the problem that the hydraulic circuit breaker is easy to trip due to external vibration can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic circuit breakers, in particular to a hydraulic circuit breaker with an anti-tripping function. Background Art

[0002] Miniature hydraulic circuit breakers are subject to continuous vibration in wind turbine applications. When the inertial impact of this vibration exceeds the force required to trip the circuit breaker, the circuit breaker will trip abnormally, affecting the operation of the equipment. For example, if a hydraulic circuit breaker is in the closed state and the bottom (the guide rail) is slightly impacted, the circuit breaker will trip.

[0003] Existing practices often involve using a spring to pull the elbow-type trip arm or a clip to lock the elbow-type trip arm. The spring tension or clip friction counteracts the inertial impact force caused by vibration, preventing the circuit breaker from tripping unexpectedly. However, relying solely on spring tension or clip friction to solve this problem is limited by the need to balance the inertial impact force caused by external vibration with the sensitivity of the tripping action. Increasing the spring tension or clip friction reduces the circuit breaker's tripping sensitivity, hindering circuit overload and short-circuit protection. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a hydraulic circuit breaker with an anti-tripping function, which can effectively solve the problem that the hydraulic circuit breaker is prone to tripping due to external vibration.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A hydraulic circuit breaker with an anti-tripping function comprises a hydraulic circuit breaker body, a long arm, a short arm, a fixed bracket, a first shaft, a second shaft, a connecting rod assembly, a connecting spring and a limit movable piece. The long arm and the short arm are respectively arranged on the inner arc surface of the handle of the hydraulic circuit breaker body and are located on one side of the elbow-shaped tripping arm close to the hydraulic circuit breaker body. When closing or opening the switch, the handle can rotate counterclockwise or clockwise around its rotating axis and drive the long arm and the short arm to rotate synchronously. The connecting rod assembly is fixed to the fixed bracket through the first shaft and the second shaft, and is connected to the fixed bracket of the hydraulic circuit breaker body through the connecting spring. One end of the fixed bracket is fixed to the fixed bracket. On the fixed frame, the other end is a cantilever end, the first axis and the second axis are arranged parallel to each other, the connecting rod assembly can rotate around the first axis and the second axis, the limiting movable plate is fixed on the fixed frame and is located next to the connecting rod assembly and the fixed bracket, and a limiting hole is formed thereon for limiting the rotation of the connecting rod assembly. When the switch is closed, the long arm and the short arm rotate counterclockwise, and the long arm first contacts with one end of the connecting rod assembly and drives the connecting rod assembly to rotate clockwise. At this time, the anti-slip part at the other end of the connecting rod assembly is stuck in the limiting hole of the limiting movable plate, and the short arm contacts with one end of the connecting rod assembly later and is stuck in the limiting protrusion of the connecting rod assembly, thereby avoiding disengagement between the handle and the elbow-type tripping arm.

[0007] Furthermore, the connecting rod assembly includes a first connecting rod, a second connecting rod, an anti-slip part and a limiting protrusion. The first connecting rod and the second connecting rod are respectively fixed to a fixed bracket by a first axis and a second axis, and one end of the second connecting rod is provided with a limiting protrusion for limiting the short arm, and the other end thereof is connected to the first connecting rod. One end of the first connecting rod forms an arc structure bent toward the second connecting rod, and the other end thereof is provided with an anti-slip part. The side of the first connecting rod close to the anti-slip part is connected to the fixed bracket through a connecting spring.

[0008] Furthermore, the second connecting rod is an L-shaped structure.

[0009] Furthermore, the first connecting rod includes a straight rod and an arc rod connected to each other, and the arc rod is an arc structure bent toward the second connecting rod.

[0010] Furthermore, the connecting rod assembly is a hardware component.

[0011] Furthermore, the armature of the hydraulic circuit breaker body is mounted on the cantilever end of the fixed bracket via a movable shaft with a limit spring.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] The utility model only requires a simple modification of the hydraulic circuit breaker, without changing the action system of the original tripping device of the circuit breaker. The vibration anti-tripping function is achieved through the friction force of the upper limit convex point of the second connecting rod and the limit hole on the limit movable plate. It can solve the influence of vibration impact in most application conditions without changing the action sensitivity of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the hydraulic circuit breaker in the open state.

[0015] Figure 2 This is a structural diagram of the hydraulic circuit breaker in the closed state. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] like Figure 1 、 Figure 2As shown, this embodiment provides a hydraulic circuit breaker with an anti-tripping function, including a hydraulic circuit breaker body, a long arm 1, a short arm 2, a fixed bracket 3, a first shaft 4, a second shaft 5, a connecting rod assembly, a connecting spring 6 and a limit movable piece 7. The long arm 1 and the short arm 2 are respectively arranged on the inner arc surface of the handle 12 of the hydraulic circuit breaker body and are located on one side of the elbow-type tripping arm 13 close to the hydraulic circuit breaker body. When closing or opening the switch, the handle 12 can rotate counterclockwise or clockwise around its rotating shaft 15, and drive the long arm 1 and the short arm 2 to rotate synchronously. The connecting rod assembly is fixed to the fixed bracket 3 through the first shaft 4 and the second shaft 5, and is connected to the fixed bracket 14 of the hydraulic circuit breaker body through the connecting spring 6. One end of the fixed bracket 3 is fixed to the fixed bracket 14, and the other end is a cantilever end. The first axis 4 and the second axis 5 are arranged parallel to each other, and the connecting rod assembly can rotate around the first axis 4 and the second axis 5. The limiting movable plate 7 is fixed on the fixing frame 14 and is located next to the connecting rod assembly and the fixing bracket 3. A limiting hole 701 is formed thereon for limiting the rotation of the connecting rod assembly. The armature 16 of the hydraulic circuit breaker body is installed on the cantilever end of the fixing bracket 3 through a movable shaft 17 with a limiting spring; when closing the circuit, the long arm 1 and the short arm 2 rotate counterclockwise, and the long arm 1 first contacts one end of the connecting rod assembly and drives the connecting rod assembly to rotate clockwise. At this time, the anti-slip part 10 at the other end of the connecting rod assembly is stuck in the limiting hole 701 of the limiting movable plate 7, and the short arm 2 contacts one end of the connecting rod assembly and is stuck in the limiting protrusion 11 of the connecting rod assembly, thereby preventing the handle 12 from being disengaged from the elbow-type tripping arm 13.

[0018] Specifically, the connecting rod assembly is a hardware component, which includes a first connecting rod 8, a second connecting rod 9, an anti-slip component 10 and a limiting protrusion 11. The first connecting rod 8 and the second connecting rod 9 are respectively fixed to the fixed bracket 3 through the first shaft 4 and the second shaft 5, and one end of the second connecting rod 9 is provided with a limiting protrusion 11 for limiting the short arm 2, and the other end is connected to the first connecting rod 8. One end of the first connecting rod 8 forms an arc structure bent toward the second connecting rod 9, and the other end is provided with an anti-slip component 10. The side of the first connecting rod 8 close to the anti-slip component 10 is connected to the fixed bracket 14 through a connecting spring 6.

[0019] Furthermore, the second connecting rod 9 is an L-shaped structure; the first connecting rod 8 includes a straight rod and an arc rod connected to each other, and the arc rod is an arc structure bent toward the second connecting rod 9.

[0020] The anti-tripping principle of the above hydraulic circuit breaker is as follows:

[0021] When closing the circuit breaker, the handle rotates counterclockwise around its axis. The long arm transmits the rotational force, causing one end of the first connecting rod to rotate clockwise around the first axis until the anti-disengagement member at the other end of the first connecting rod engages within the stop hole. At this point, the connecting spring is in tension, completing the closing process. Simultaneously, the first connecting rod drives the second connecting rod to rotate clockwise around the second axis until the short arm engages within the second connecting rod's stop point. This prevents the handle from disengaging from the elbow-type trip arm, preventing the tripping mechanism from tripping, and thus resolving the issue of abnormal tripping caused by vibration. Furthermore, during the closing operation, since the short arm rotates faster than the second connecting rod, it does not interfere with the second connecting rod's stop point.

[0022] When vibrations on the hydraulic circuit breaker cause the handle to move toward the tripped position (clockwise), the stopper bump on the second connecting rod exerts friction on the short arm. This friction offsets some of the handle's tripping energy, preventing vibration-induced abnormal tripping of the circuit breaker. Furthermore, since the anti-disengagement member at the other end of the first connecting rod is locked in the retaining hole of the stopper, it is not easily pulled out, providing instantaneous stability for the second connecting rod and mitigating the effects of external vibrations to a certain extent.

[0023] The above is only a preferred embodiment of the present utility model patent, but the protection scope of the present utility model patent is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present utility model patent based on the technical solution and the utility model patent concept of the present utility model patent, which falls within the protection scope of the present utility model patent.

Claims

1. A hydraulic circuit breaker with an anti-tripping function, characterized in that: The hydraulic circuit breaker comprises a body, a long arm, a short arm, a fixed bracket, a first shaft, a second shaft, a connecting rod assembly, a connecting spring and a limit movable piece. The long arm and the short arm are respectively arranged on the inner arc surface of the handle of the hydraulic circuit breaker body and are located on the side of the elbow-type tripping arm close to the hydraulic circuit breaker body. When closing or opening the switch, the handle can rotate counterclockwise or clockwise around its rotating axis and drive the long arm and the short arm to rotate synchronously. The connecting rod assembly is fixed to the fixed bracket through the first shaft and the second shaft, and is connected to the fixed bracket of the hydraulic circuit breaker body through the connecting spring. One end of the fixed bracket is fixed to the fixed bracket, and the other end thereof is fixed to the fixed bracket. It is a cantilever end, the first axis and the second axis are arranged parallel to each other, the connecting rod assembly can rotate around the first axis and the second axis, the limiting movable plate is fixed on the fixing frame, and is located next to the connecting rod assembly and the fixing bracket, and a limiting hole is formed thereon for limiting the rotation of the connecting rod assembly. When the switch is closed, the long arm and the short arm rotate counterclockwise, and the long arm first contacts with one end of the connecting rod assembly and drives the connecting rod assembly to rotate clockwise. At this time, the anti-slip part at the other end of the connecting rod assembly is stuck in the limiting hole of the limiting movable plate, and the short arm contacts with one end of the connecting rod assembly later and is stuck in the limiting protrusion of the connecting rod assembly, thereby avoiding disengagement between the handle and the elbow-type tripping arm.

2. The hydraulic circuit breaker with anti-tripping function according to claim 1, characterized in that: The connecting rod assembly includes a first connecting rod, a second connecting rod, an anti-slip part and a limiting protrusion. The first connecting rod and the second connecting rod are respectively fixed to a fixed bracket by a first shaft and a second shaft, and one end of the second connecting rod is provided with a limiting protrusion for limiting the short arm, and the other end thereof is connected to the first connecting rod. One end of the first connecting rod forms an arc structure bent toward the second connecting rod, and the other end thereof is provided with an anti-slip part. The side of the first connecting rod close to the anti-slip part is connected to the fixing bracket through a connecting spring.

3. The hydraulic circuit breaker with anti-tripping function according to claim 2, characterized in that: The second connecting rod is an L-shaped structure.

4. The hydraulic circuit breaker with anti-tripping function according to claim 2, characterized in that: The first connecting rod includes a straight rod and an arc rod connected to each other, and the arc rod is an arc structure bent toward the second connecting rod.

5. The hydraulic circuit breaker with anti-tripping function according to claim 1 or 2, characterized in that: The connecting rod assembly is a hardware component.

6. The hydraulic circuit breaker with anti-tripping function according to claim 1, characterized in that: The armature of the hydraulic circuit breaker body is mounted on the cantilever end of the fixed bracket through a movable shaft with a limit spring.

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