Manual opening device of magnetic control circuit breaker

Abstract

The utility model relates to a manual opening device of a magnetic control circuit breaker, which comprises a synchronizing shaft, a crank arm is fixedly arranged on the synchronizing shaft corresponding to a magnetic control mechanism, the crank arm is connected with an opening mechanism of the magnetic control mechanism through a connecting plate, the connecting plate is rotatably connected with the crank arm and the opening mechanism, one end of the synchronizing shaft is sleeved with a connecting sleeve, and the other end of the synchronizing shaft is sleeved with a connecting rod. A kidney-shaped through hole is formed in the side wall of the connecting sleeve, a connecting pin is installed in the kidney-shaped through hole and penetrates through the synchronizing shaft in the radial direction, and the outer end of the connecting sleeve is connected with an operating handle. The hand-operated switch-off device is simple in structure, can meet the requirement of hand-operated switch-off, and has a certain waterproof function.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a manual opening device for a magnetically controlled circuit breaker. Background Art

[0002] At present, magnetically controlled circuit breakers, as an efficient, fast and safe circuit breaker, have gradually attracted the attention and favor of the market. With the continuous advancement of science and technology, the technology of magnetically controlled fast circuit breakers is also constantly innovating and developing. In the future, magnetically controlled fast circuit breakers will adopt more advanced materials, processes and designs to improve product performance and reliability and meet users' needs for efficiency, safety and stability. In the group standard T / CES 209-2023 "12kV magnetically controlled column-mounted switch technical specifications" of the China Electrotechnical Society, it is specifically stipulated that the switch must have a manual opening function, and the operating force of the manual opening of the circuit breaker should meet the requirements of DL / T403-2017. However, most of the existing magnetically controlled circuit breakers on the market do not have a manual opening function, or the manual opening structure is complex, and the manual opening operating force is too large, which does not meet the requirements. In addition, as an outdoor power equipment, the magnetically controlled circuit breaker must be reliable in rain and condensation protection, and many magnetically controlled circuit breakers on the market are rusted due to poor sealing, resulting in circuit breaker failure. Summary of the invention

[0003] The main purpose of the utility model is to solve the problems existing in the above-mentioned prior art and provide a manual opening device for a magnetically controlled circuit breaker.

[0004] The specific scheme of the utility model is: a manual opening device of a magnetically controlled circuit breaker, comprising a synchronous shaft, a crank arm is fixedly installed on the synchronous shaft corresponding to the magnetic control mechanism, the crank arm is connected to the opening mechanism of the magnetic control mechanism through a connecting plate, the connecting plate is rotatably connected to the crank arm and the opening mechanism, one end of the synchronous shaft is sleeved with a connecting sleeve, the side wall of the connecting sleeve is provided with a waist-shaped through hole, a connecting pin is installed in the waist-shaped through hole, the connecting pin radially passes through the synchronous shaft, and the outer end of the connecting sleeve is connected to an operating handle.

[0005] Furthermore, the utility model also includes a reset mechanism, which includes a fixed pin and a movable pin, the fixed pin is installed on the inner wall of the circuit breaker housing, the movable pin is fixedly connected to the connecting sleeve, and a tension spring is installed between the movable pin and the fixed pin.

[0006] Furthermore, the utility model also includes two limit pins, which are fixedly connected to the inner wall of the circuit breaker housing, and the two limit pins are respectively arranged at the closing position and the opening position of the movable pin.

[0007] Furthermore, an operating shaft is provided between the connecting sleeve and the operating handle, the movable pin is mounted on the operating shaft, one end of the operating shaft is fixedly connected to the operating handle, and the other end of the operating shaft is clamped with the connecting sleeve.

[0008] Furthermore, a slot is provided at one end of the connecting sleeve facing the operating shaft, and a protrusion matching the slot is provided at the operating shaft.

[0009] Furthermore, a shaft sleeve is provided on the circuit breaker housing corresponding to the operating shaft, the shaft sleeve is rotatably connected to the operating shaft, and a sealing ring is installed between the shaft sleeve and the operating shaft.

[0010] Compared with the prior art, the utility model has the following advantages: 1. It has a simple structure and can meet the needs of manual opening. A seal is set at the joint between the moving parts and the shell, which has a certain waterproof function; 2. Some of the required parts can be used interchangeably with existing circuit breaker products, reducing the number of additional parts, with good economy and substitutability, and reducing the difficulty of upgrading products on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional view of the structure of the utility model;

[0012] Figure 2 yes Figure 1 A top view of

[0013] Figure 3 yes Figure 2 A magnified view of point A;

[0014] Figure 4 This is a schematic diagram of the utility model in the closed state;

[0015] Figure 5 This is a schematic diagram of the utility model in the open state;

[0016] Figure 6 yes Figure 3 BB cross-sectional view;

[0017] Figure 7 yes Figure 6 Schematic diagram of the reset state of the operating handle after the opening operation is performed on the basis;

[0018] In the figure: 1. operating handle; 2. housing; 3. fixing pin; 4. tension spring; 5. movable pin; 6. limit pin; 7. limit pin; 8. operating shaft; 9. connecting sleeve; 91. waist-shaped through hole; 10. connecting pin; 11. synchronization shaft; 12. crank arm; 13. magnetic control mechanism. DETAILED DESCRIPTION

[0019] See also Figure 1-3The present embodiment is a manual opening device for a magnetically controlled circuit breaker, comprising a synchronous shaft 11, a crank arm 12 is fixedly mounted on the synchronous shaft 11 at a position corresponding to a magnetically controlled mechanism 13, the crank arm 12 is connected to an opening mechanism of the magnetically controlled mechanism 13 via a connecting plate, the connecting plate is rotatably connected to the crank arm 12 and the opening mechanism, a connecting sleeve 9 is sleeved on one end of the synchronous shaft 11, a waist-shaped through hole 91 is provided on the side wall of the connecting sleeve 9, a connecting pin 10 is mounted in the waist-shaped through hole 91, the connecting pin 10 passes through the synchronous shaft 11 in a radial direction, and an operating handle 1 is connected to the outer end of the connecting sleeve 9.

[0020] Furthermore, the present embodiment also includes a reset mechanism, which includes a fixed pin 3 and a movable pin 5. The fixed pin 3 is installed on the inner wall of the circuit breaker housing 2. The movable pin 5 is fixedly connected to the connecting sleeve 9. A tension spring 4 is installed between the movable pin 5 and the fixed pin 3.

[0021] Furthermore, the present embodiment further comprises two limit pins, which are fixedly connected to the inner wall of the circuit breaker housing 2 , wherein the limit pin 6 is arranged at the closing position of the movable pin 5 , and the limit pin 7 is arranged at the opening position of the movable pin 5 .

[0022] Furthermore, an operating shaft 8 is provided between the connecting sleeve 9 and the operating handle 1 , and the movable pin 5 is installed on the operating shaft 8 . One end of the operating shaft 8 is fixedly connected to the operating handle 1 , and the other end of the operating shaft 8 is clamped with the connecting sleeve 9 .

[0023] Furthermore, a slot is provided at one end of the connecting sleeve 9 facing the operating shaft 8, and the operating shaft 8 is provided with a protrusion matching the slot.

[0024] Furthermore, a sleeve is provided on the circuit breaker housing 2 corresponding to the operating shaft 8, the sleeve is rotatably connected to the operating shaft 8, and a sealing ring is installed between the sleeve and the operating shaft 8, so that the part has a certain waterproof function. The working principle of the utility model is as follows: Figure 3 , Figure 4 When the circuit breaker is in the closed state, the right end of the connecting pin 10 contacts the upper end of the waist-shaped through hole 91 of the connecting sleeve 9. Figure 6 As shown, the magnetic control mechanism 13 is in the closing position, and the movable pin 5 is in contact with the limit pin 6 in the closing position. When the manual opening operation is performed, see Figure 5Rotating the operating handle 1 drives the operating shaft 8, thereby driving the connecting sleeve 9 to rotate to the right. The connecting sleeve 9 drives the synchronous shaft 11 to rotate through the connecting pin 10, and then drives all the crank arms 12 to rotate synchronously and drives the corresponding connecting plates to translate in the opening direction, thereby driving the opening mechanism of the magnetic control mechanism 13 to perform the opening action. When the movable pin 5 contacts the limit pin 7, the opening limit position is reached, and the manual opening operation is completed; when the operating handle 1 is released, the tension spring 4 automatically drives the operating shaft 8 and the operating handle 1 to reset, and the operating shaft 8 drives the connecting sleeve 9 to rotate in the resetting direction. Since the connecting sleeve 9 is provided with a waist-shaped through hole 91, when the connecting sleeve 9 is reset, it will not drive the connecting pin 10, and will not drive the synchronous shaft 11, so the synchronous shaft 11 remains in the opening position. At this time, the right end of the connecting pin 10 contacts the lower end of the waist-shaped through hole 91, as shown in FIG. Figure 7 As shown; the synchronous shaft 11 can only be driven to rotate to the closing position by the action of the magnetic control mechanism 13 to close the switch.

Claims

1. A manual opening device for a magnetically controlled circuit breaker, characterized in that: Includes synchronization A crank arm is fixedly installed on the synchronous shaft corresponding to the magnetic control mechanism. The crank arm is connected to the opening mechanism of the magnetic control mechanism through a connecting plate. The connecting plate is rotatably connected to the crank arm and the opening mechanism. A connecting sleeve is sleeved on one end of the synchronous shaft. A waist-shaped through hole is provided on the side wall of the connecting sleeve. A connecting pin is installed in the waist-shaped through hole. The connecting pin passes through the synchronous shaft radially. The outer end of the connecting sleeve is connected to an operating handle.

2. A magnetically controlled circuit breaker manual opening device according to claim 1, characterized in that: It also includes a reset mechanism, which includes a fixed pin and a movable pin. The fixed pin is installed on the inner wall of the circuit breaker housing, the movable pin is fixedly connected to the connecting sleeve, and a tension spring is installed between the movable pin and the fixed pin.

3. A manual opening device for a magnetically controlled circuit breaker according to claim 2, characterized in that: It also includes two limit pins, which are fixedly connected to the inner wall of the circuit breaker housing, and the two limit pins are respectively arranged at the closing position and the opening position of the movable pin.

4. A magnetically controlled circuit breaker manual opening device according to claim 2, characterized in that: An operating shaft is arranged between the connecting sleeve and the operating handle, the movable pin is mounted on the operating shaft, one end of the operating shaft is fixedly connected to the operating handle, and the other end of the operating shaft is clamped with the connecting sleeve.

5. A manual opening device for a magnetically controlled circuit breaker according to claim 4, characterized in that: The end of the connecting sleeve facing the operating shaft is provided with a slot, and the operating shaft is provided with a protrusion matching the slot.

6. A manual opening device for a magnetically controlled circuit breaker according to claim 4, characterized in that: A shaft sleeve is arranged on the circuit breaker housing at a position corresponding to the operating shaft. The shaft sleeve is rotationally connected to the operating shaft, and a sealing ring is arranged between the shaft sleeve and the operating shaft.

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