A kind of interlocking manual opening mechanism of permanent magnetic circuit breaker

Abstract

The present invention discloses an interlocking manual opening mechanism of a permanent magnetic circuit breaker. It includes an opening transmission part, an opening operation linkage part and an opening interlocking protection part installed on the circuit breaker frame. The opening operation linkage part is connected to the opening transmission part and the opening interlocking protection part in an interlocking transmission manner. The opening operation linkage part is arranged below the opening transmission part, and the opening interlocking protection part is arranged below the opening operation linkage part. The present invention has the beneficial effects: by adopting a humanized split interlocking control structure design, the position of the manual opening operation part is moved downward and adjusted to a suitable operating height, so that the operator can complete the manual opening operation more conveniently and easily. By rotating the indicating baffle and cooperating with the opening indicating hole, the operator can intuitively and accurately grasp the real-time status of the circuit breaker after manual operation. The interlocking action structure of the opening operation linkage part and the opening interlocking protection part has more reliable safety protection.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary control structures of power distribution switch cabinets, and more specifically, in particular to an interlocking manual opening mechanism of a permanent magnetic circuit breaker. Background Art

[0002] The distribution switchgear is an electrical device used to distribute electric energy. Its main function is to control, protect and monitor the circuits in the power system. It can realize the opening and closing operation of the circuit and distribute the electric energy to different branches or user ends. It is suitable for a variety of distribution sites such as substations, urban communities, and industrial electricity. The distribution switchgear can distribute the high voltage electricity from the substation to each power branch. At the same time, when a branch fails (such as short circuit, overload), it can cut off the circuit in time to protect the equipment from damage, and can monitor the current, voltage and other parameters in the circuit.

[0003] The components of the distribution switch cabinet include cabinet body, busbar system, circuit breaker, disconnector, transformer, fuse and other structures. The circuit breaker is installed in the gas box module of the cabinet body. The circuit breaker is one of the core components of the distribution switch cabinet. It needs to be able to connect and disconnect the circuit under normal working conditions of the power system. When the circuit is overloaded, short-circuited or other faults occur, it can quickly cut off the circuit to protect the safety of electrical equipment and power system lines. In order to ensure that the circuit breaker of the distribution switch cabinet can ensure the normal completion of the opening and closing action when the system is running, an auxiliary opening and closing control device will be set on the circuit breaker, such as an electronic opening and closing mechanism, a spring energy storage mechanism, and a permanent magnetic opening and closing mechanism. Under normal operating conditions, the auxiliary opening and closing control device (permanent magnetic opening and closing mechanism) realizes the opening and closing operation of the circuit breaker by receiving electrical control signals. However, in some special cases, such as when the control power supply fails or the electrical control circuit fails seriously and the opening signal cannot be issued, it is necessary to manually operate the manual opening device through tools such as handles and pull rods to control the opening of the circuit breaker. However, the poles and auxiliary opening and closing control devices of the existing circuit breaker are all arranged at the upper end of the cabinet, resulting in that the operating part of the manual opening device is arranged at a position higher than the ground. When performing manual opening operation, the operator needs to raise both hands to complete the operation, and it is difficult to confirm the working status of the circuit breaker, which is inconvenient to operate and the operator cannot grasp the operating status in time.

[0004] In view of this, it is necessary to improve the structure of the manual opening device of the circuit breaker to solve the problem of inconvenient manual operation in the existing structure. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide an interlocking manual opening mechanism for a permanent magnetic circuit breaker which has a humanized design, convenient operation and observation, and a reasonable interlocking protection structure.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A lock-locked manual opening mechanism of a permanent magnetic circuit breaker comprises a closing transmission part, a closing operation linkage part and a closing interlocking protection part installed on a circuit breaker frame, wherein the closing operation linkage part is connected to the closing transmission part and the closing interlocking protection part in a lock-locking transmission, the closing operation linkage part is arranged below the closing transmission part, and the closing interlocking protection part is arranged below the closing operation linkage part, the closing transmission part is used to be combined with a permanent magnetic mechanism and a closing coupling shaft of a vacuum circuit breaker to realize transmission opening; the closing operation linkage part is used to connect the closing transmission part and the closing interlocking protection part to realize operation interlocking, and interlockingly control the closing transmission part and the closing interlocking protection part to realize corresponding actions; the closing interlocking protection part is used to cooperate with the closing operation linkage part, and complete the lock-locking protection of the disconnector operation according to the operation action of the closing operation linkage part.

[0008] Furthermore, a switch-off transmission shaft and a switch-off operating shaft are installed in the switch-off bracket of the switch-off operation linkage part, one end of the switch-off transmission shaft is installed on the transmission shaft fixing seat of the circuit breaker frame, and an indication baffle is installed on the other end of the switch-off transmission shaft, and the indication baffle rotates with the switch-off connecting shaft, and a switch-off driven paddle is installed on the switch-off transmission shaft, and a switch-off transmission paddle is installed on the switch-off operating shaft. A switch-off pressure rod is installed on the transmission side of the switch-off transmission paddle, and the switch-off pressure rod cooperates with the switch-off driven end of the switch-off driven paddle, and a switch-off reset connecting column is installed on the switch-off transmission paddle, and a switch-off reset fixing column is provided in the switch-off bracket, and the switch-off reset connecting column and the switch-off reset fixing column are connected by a switch-off reset spring, and an operation connection card column is provided at the connection end of the switch-off operating shaft, and the switch-off operating handle passes through the switch-off operation hole of the cabinet and is inserted into the cabinet. After being combined with the operation connection card column, the interlocking manual switch-off mechanism can be directly operated to realize manual switch-off interlocking control.

[0009] Furthermore, the switch-off coupling rotating seat of the switch-off transmission part is installed at the upper end of the circuit breaker frame and is combined with the switch-off coupling of the permanent magnet mechanism, the switch-off connection end of the switch-off coupling rotating seat is combined with the first crank arm, the first crank arm is combined with the second crank arm transmission through the switch-off connecting rod, the second crank arm is combined with the switch-off transmission shaft, the protection connecting rod of the switch-off interlocking protection part is slidably installed on the protection bracket, one end of the protection connecting rod is combined with the switch-off transmission shaft through the third crank arm, the protection connection end of the protection connecting rod is combined with the interlocking protection baffle, the interlocking protection baffle is connected to the rotating shaft, the interlocking protection baffle rotates with the rotating shaft as the axis, and the interlocking protection baffle is arranged on the connection side of the disconnector operating shaft. A protection reset connecting column is installed on the interlocking protection baffle, a protection reset fixed column is provided on one side of the protection connecting end of the protection connecting rod, and a protection reset spring is connected and installed between the protection reset connecting column and the protection reset fixed column.

[0010] Preferably, the distance between the opening gate operating shaft and the opening gate coupling rotating seat is set to a position where the opening gate coupling rotating seat is a distance h=280-320mm downward. The opening gate operating shaft moves downward by a distance h=280-320mm relative to the opening gate coupling rotating seat 16 and the opening gate coupling connected to the opening gate coupling rotating seat 16. The downward movement distance h=300mm can be selected to reduce the manual opening gate operation height required for the opening gate operating shaft and improve the convenience of operation. Furthermore, the opening gate operating shaft is set at a height of H=1.2-1.4m from the bottom of the cabinet. The operator has a moderate torque for connecting the opening gate operating shaft, and there is no need to lift the arm for operation. The interlocking structure design is more user-friendly.

[0011] Preferably, the indicator baffle is aligned with the opening indication hole of the cabinet, the indicator baffle rotates with the opening transmission shaft, and the opening transmission shaft is driven to move according to the opening operation shaft. The indicator baffle cooperates with the opening indication hole to realize the opening action indication, so that the operator can intuitively grasp the working status of the vacuum circuit breaker. The protective part of the interlocking protective baffle is aligned with the isolating switch operating hole of the cabinet. The interlocking protective baffle rotates along the rotating shaft following the action of the protective connecting rod, and the interlocking protective baffle cooperates with the isolating switch operating hole. When the vacuum circuit breaker is in the closed state, the isolating switch operating hole is blocked to avoid misoperation of the isolating switch. When the vacuum circuit breaker is in the open state, the isolating switch operating hole is opened for the operator to manually operate the isolating switch.

[0012] Preferably, a combination sleeve is installed in the opening coupling shaft rotating seat through a rotating connection bearing, and a opening coupling shaft combination clamping hole is opened in the connecting end of the combination sleeve. The opening coupling shaft combination clamping hole and the opening coupling shaft realize synchronous transmission combination, and smoothly and accurately drive the opening coupling shaft to realize the opening action.

[0013] Preferably, a switch-off connection column is provided at the combination end of the combination sleeve, and the combination hole of the switch-off connection column and the first crank arm is a limit transmission combination. Further, rotation limit surfaces are provided on both sides of the switch-off connection column, and a transmission limit surface is provided on the inner side of the combination hole, and the transmission limit surface is limitedly matched with the rotation limit surface. The interlocking transmission between the switch-off transmission part and the switch-off operation linkage part is better realized.

[0014] Preferably, the protective link sliding includes a longitudinal sliding part and a transverse extension part, the longitudinal sliding part is respectively arranged at both ends of the transverse extension part, a limiting sliding groove is opened on the longitudinal sliding part, and the limiting sliding groove and the sliding limiting guide part on the protective bracket are a sliding combination with each other.

[0015] Preferably, one end of the switch-off reset connecting column and the switch-off reset fixed column is provided with a switch-off reset slot, and the switch-off reset slot is fixedly combined with the connecting end of the switch-off reset spring, so that the switch-off reset spring can be more firmly connected and installed on the switch-off reset connecting column and the switch-off reset fixed column, and plays a reliable auxiliary reset role. One end of the protection reset connecting column and the protection reset fixed column is provided with a protection reset slot, and the protection reset slot is fixedly combined with the connecting end of the protection reset spring. Through the auxiliary action of the protection reset spring, the cooperation between the protection reset connecting column and the protection reset fixed column is more stable, and the protection interlocking reset action is more accurately achieved, thereby ensuring the safe operation of the equipment.

[0016] Preferably, the first crank arm and the second crank arm are connected to the opening switch connecting rod through the opening switch shaft. By utilizing the rotation connection of the opening switch shaft, the second crank arm can more smoothly drive the first crank arm to complete the opening switch rotation action under the drive of the opening switch operating shaft, and complete the opening switch interlocking more smoothly.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention adjusts the position of the manual opening operation part downward to a suitable operating height by operating the opening transmission part and the opening operation linkage part in conjunction with the humanized split interlocking control structure design of the cabinet, and sets the manual opening operation part at a position 300mm below the opening coupling shaft of the circuit breaker, so that the opening operation shaft is set at a position 1.2-1.4m away from the bottom of the distribution cabinet. The operator can operate without raising his hand and the operating torque is moderate, so that the operator can complete the manual opening operation more conveniently and easily when emergency opening operation or maintenance operation is required, and a closing indication structure is also provided on the opening transmission shaft of the opening operation linkage part. , by rotating the indicating baffle and cooperating with the opening indicating hole, the operator can intuitively and accurately grasp the real-time status of the circuit breaker after manual operation. Furthermore, the present invention adopts an interlocking action structure of the opening operation linkage part and the opening interlocking protection part. When the manual opening operation is not performed, the disconnector is interlocked with the protection to avoid misoperation of the disconnector in the running state, which may lead to production accidents. When the opening operating shaft is operated to control the circuit breaker to realize the opening action, the interlocking protection baffle is opened at the same time, so that the operator can operate the disconnector through the operating hole of the disconnector after ensuring that the circuit breaker is opened, thereby ensuring safe operation and having more reliable safety protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The invention discloses a schematic diagram of the installation of an interlocking manual opening mechanism of a permanent magnetic circuit breaker.

[0020] Figure 2 The present invention is a schematic structural diagram of an interlocking manual opening mechanism of a permanent magnetic circuit breaker.

[0021] Figure 3 It is a schematic diagram of the back structure of an interlocking manual opening mechanism of a permanent magnetic circuit breaker provided by the present invention.

[0022] Figure 4 The present invention is a schematic diagram of the internal structure of an interlocking manual opening mechanism of a permanent magnetic circuit breaker.

[0023] Figure 5 The present invention is a schematic diagram of the combination of a tripping operation shaft of an interlocking manual tripping mechanism of a permanent magnetic circuit breaker provided by the present invention in a cabinet.

[0024] Figure 6 The present invention is a schematic diagram of the front position of an opening operation shaft of an interlocking manual opening mechanism of a permanent magnetic circuit breaker provided by the present invention within a cabinet.

[0025] Description of Figure Numbers:

[0026] Opening transmission part-1, opening operation linkage part-2, opening interlocking protection part-3, opening bracket-4, opening transmission shaft-5, opening operation shaft-6, transmission shaft fixing seat-7, opening driven paddle-8, opening transmission paddle-9, opening pressure rod-10, opening reset connecting column-11, opening reset fixing column-12, opening reset spring-13, operation connection card column-14, indicator baffle-15, opening coupling shaft rotating seat-16, first turning arm-17, opening connecting rod-1 8, second crank arm -19, protection connecting rod -20, third crank arm -21, interlocking protection baffle -22, rotating shaft -23, protection reset connecting column -24, protection reset fixing column -25, protection reset spring -26, combination sleeve -27, opening brake connecting shaft combination card hole -28, opening brake connecting column -29, longitudinal sliding part -30, transverse extension part -31, limiting sliding groove -32, sliding limiting guide part -33, opening brake reset card slot -34, protection reset card slot -35. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The present invention is further described below with reference to specific embodiments and accompanying drawings:

[0030] like Figures 1 to 6The structure diagram of the interlocking manual opening mechanism of the permanent magnetic circuit breaker provided by the present invention is shown. Specifically, the present invention is an interlocking manual opening mechanism of the permanent magnetic circuit breaker, comprising an opening transmission part 1, an opening operation linkage part 2 and an opening interlocking protection part 3 installed on the circuit breaker frame, the opening operation linkage part 2 and the opening transmission part 1 and the opening interlocking protection part 3 are connected to each other in an interlocking transmission, the opening operation linkage part 2 is arranged below the opening transmission part 1, and the opening interlocking protection part 3 is arranged below the opening operation linkage part 2, the opening transmission part 1 is used to be combined with the opening shaft of the permanent magnetic mechanism and the vacuum circuit breaker to realize transmission opening; the opening operation linkage part 2 is used to connect the opening transmission part and the opening interlocking protection part 3 to realize operation interlocking, and interlocking control of the opening transmission part 1 and the opening interlocking protection part 3 to realize corresponding actions; the opening interlocking protection part 3 is used to cooperate with the opening operation linkage part 2, and interlockingly complete the interlocking protection of the disconnector operation according to the operation action of the opening operation linkage part 2.

[0031] Further, a switch-off transmission shaft 5 and a switch-off operating shaft 6 are installed in the switch-off bracket 4 of the switch-off operation linkage part 2, one end of the switch-off transmission shaft 5 is installed on the transmission shaft fixing seat 7 of the circuit breaker frame, and the other end of the switch-off transmission shaft 5 is installed with an indication baffle 15, and the indication baffle 15 rotates with the switch-off coupling shaft, and a switch-off driven paddle 8 is installed on the switch-off transmission shaft 5, and a switch-off transmission paddle 9 is installed on the switch-off operating shaft 6, and a switch-off pressure rod 10 is installed on the transmission side of the switch-off transmission paddle 9, and the switch-off pressure rod 10 is connected to the switch-off pressure rod 10. The opening driven end of the opening driven paddle 8 is matched, and a opening reset connecting column 11 is installed on the opening transmission paddle 9. A opening reset fixing column 12 is provided in the opening bracket 4. The opening reset connecting column 11 and the opening reset fixing column 12 are connected by a opening reset spring 13. The connecting end of the opening operating shaft 6 is provided with an operating connection card column 14. The opening operating handle passes through the opening operating hole of the cabinet and is inserted into the cabinet. After being combined with the operating connection card column 14, the interlocking manual opening mechanism can be directly operated to realize manual opening interlocking control. The opening coupling rotating seat 16 of the opening transmission part 1 is installed at the upper end of the circuit breaker frame and is combined with the opening coupling of the permanent magnet mechanism. The opening connection end of the opening coupling rotating seat 16 is combined with the first crank arm 17. The first crank arm 17 is combined with the second crank arm 19 through the opening connecting rod 18. The second crank arm 19 is combined with the opening transmission shaft 5. The protection connecting rod 20 of the opening interlocking protection part 3 is slidably installed on the protection bracket. One end of the protection connecting rod 20 is combined with the opening transmission shaft 5 through the third crank arm 21. The protection connection end of the protection connecting rod 20 is rotationally combined with the interlocking protection baffle 22. The interlocking protection baffle 22 is connected to the rotating shaft 23. The interlocking protection baffle 22 rotates around the rotating shaft 23. The interlocking protection baffle 22 is arranged on the connection side of the operating shaft of the disconnector. A protection reset connecting column 24 is installed on the interlocking protection baffle 22, a protection reset fixing column 25 is provided on one side of the protection connection end of the protection link 20, and a protection reset spring 26 is connected and installed between the protection reset connecting column 24 and the protection reset fixing column 25.

[0032] Preferably, the distance between the opening switch operating shaft 6 and the opening switch coupling rotating seat 16 is set to a position where the opening switch coupling rotating seat 16 is a distance h280-320 mm downward. The opening switch operating shaft 6 moves downward by a distance h=280-320 mm relative to the opening switch coupling rotating seat 16 and the opening switch coupling connected to the opening switch coupling rotating seat 16, and the downward movement distance h=300 mm can be selected to reduce the manual opening operation height required by the opening switch operating shaft 6 and improve the convenience of operation.

[0033] Furthermore, the opening switch operating shaft 6 is arranged at a height H=1.2-1.4m from the bottom of the cabinet. The operator has a moderate torque for connecting the opening switch operating shaft 6, and does not need to lift the arm for operation, and the interlocking structure design is more humane.

[0034] Preferably, the indicator baffle 15 is aligned with the opening indicator hole of the cabinet, and the indicator baffle 15 rotates with the opening drive shaft 5. The opening drive shaft 5 is driven to move according to the opening operation shaft 6. The indicator baffle 15 cooperates with the opening indicator hole to realize the opening action indication, so that the operator can intuitively grasp the working status of the vacuum circuit breaker. The protective part of the interlocking protective baffle 22 is aligned with the isolating switch operating hole of the cabinet. The interlocking protective baffle 22 rotates along the rotating shaft 23 following the action of the protective connecting rod 20. The interlocking protective baffle 22 cooperates with the isolating switch operating hole. When the vacuum circuit breaker is in the closed state, the isolating switch operating hole is blocked to avoid misoperation of the isolating switch. When the vacuum circuit breaker is in the open state, the isolating switch operating hole is opened for the operator to manually operate the isolating switch.

[0035] Preferably, a combination sleeve 27 is installed in the opening coupling shaft rotating seat 16 through a rotating connection bearing, and an opening coupling shaft combination clamping hole 28 is opened in the connection end of the combination sleeve 27. The opening coupling shaft combination clamping hole 28 realizes synchronous transmission combination with the opening coupling, and smoothly and accurately drives the opening coupling shaft to realize the opening action.

[0036] Preferably, a switch-off connection column 29 is provided at the combination end of the combination sleeve 27, and the switch-off connection column 29 and the combination hole of the first crank arm 17 are a limit transmission combination. Further, rotation limit surfaces are provided on both sides of the switch-off connection column 29, and a transmission limit surface is provided on the inner side of the combination hole, and the transmission limit surface is limitedly matched with the rotation limit surface. The interlocking transmission between the switch-off transmission part 1 and the switch-off operation linkage part 2 is better realized.

[0037] Preferably, the sliding of the protective link 20 includes a longitudinal sliding part 30 and a transverse extension part 31, and the longitudinal sliding part 30 is respectively arranged at both ends of the transverse extension part 31. A limiting sliding groove 32 is opened on the longitudinal sliding part 30, and the limiting sliding groove 32 and the sliding limiting guide part 33 on the protective bracket are a sliding combination with each other.

[0038] Preferably, one end of the switch-off reset connecting column 11 and the switch-off reset fixing column 12 is provided with a switch-off reset slot 34, and the switch-off reset slot 34 is fixedly combined with the connecting end of the switch-off reset spring 13, so that the switch-off reset spring 13 can be more firmly connected and installed on the switch-off reset connecting column 11 and the switch-off reset fixing column 12, and plays a reliable auxiliary reset role. One end of the protection reset connecting column 24 and the protection reset fixing column 25 is provided with a protection reset slot 35, and the protection reset slot 35 is fixedly combined with the connecting end of the protection reset spring 26. Through the auxiliary action of the protection reset spring 26, the cooperation between the protection reset connecting column 24 and the protection reset fixing column 25 is more stable, and the protection interlocking reset action is more accurately realized, thereby ensuring the safe operation of the equipment.

[0039] Preferably, the first crank arm 17 and the second crank arm 19 are rotationally connected to the opening switch connecting rod 18 via the opening switch shaft. By utilizing the rotational connection of the opening switch shaft, the second crank arm 19 can more smoothly drive the first crank arm 17 to complete the opening switch rotation action under the drive of the opening switch operating shaft 6, and complete the opening switch interlocking more smoothly.

[0040] First embodiment:

[0041] In this embodiment, Figure 1-6 As shown, a lock-locked manual opening mechanism of a permanent magnetic circuit breaker comprises a closing transmission part 1, a closing operation linkage part 2 and a closing lock protection part 3 installed on a circuit breaker frame, the closing operation linkage part 2 is connected to the closing transmission part 1 and the closing lock protection part 3 in a lock-locked transmission manner, the closing operation linkage part 2 is arranged below the closing transmission part 1, the closing lock protection part 3 is arranged below the closing operation linkage part 2, a closing transmission shaft 5 and a closing operation shaft 6 are installed in a closing bracket 4 of the closing operation linkage part 2, an indicating baffle 15 is installed at the other end of the closing transmission shaft 5, a closing coupling shaft rotating seat 16 of the closing transmission part 1 is installed at the upper end of the circuit breaker frame and combined with the closing coupling shaft of the permanent magnetic mechanism, a protective connecting rod 20 of the closing lock protection part 3 is slidably installed on the protective bracket, and a protective connecting end of the protective connecting rod 20 is rotated and combined with a locking protection baffle 22. The indicating baffle 15 is aligned with the closing indication hole of the cabinet, and the locking protection baffle 22 is matched with the disconnector operation hole.

[0042] In this embodiment, the distance between the opening operation shaft 6 and the opening coupling rotating seat 16 can be selected to be set at a position 280-320 mm downward from the opening coupling rotating seat 16, so that the opening operation shaft 6 is set at a height position 1.2-1.4 m from the bottom of the distribution switch cabinet.

[0043] When it is necessary to manually open the permanent magnet mechanism connected to the vacuum circuit breaker through the interlocking manual opening mechanism of the permanent magnet circuit breaker, the operator holds the manual opening operating handle and passes it through the opening operating hole of the cabinet, inserts it into the cabinet, and combines it with the operating connection clamp column 14 to limit the combination. Then, the manual opening operating handle is rotated in the opening rotation direction to make the opening operating shaft 6 rotate counterclockwise. When the manual opening operating handle controls the rotation of the opening operating shaft 6, the opening reset spring 13 is stretched by the opening reset connecting column 11, and the opening reset spring 13 provides appropriate operating resistance to the opening operating shaft 6 through the opening transmission paddle 9, so that the operator can have a better operating feedback experience. The opening operation shaft 6 drives the opening transmission paddle 9 to rotate, and the opening pressure rod 10 of the opening transmission paddle 9 presses down the opening driven paddle 8 to drive the opening transmission shaft 5 to rotate clockwise on the transmission shaft fixing seat 7, and the opening transmission shaft 5 drives the second turning arm 19 to rotate downward, and the second turning arm 19 is connected to the opening connecting rod 18 through the opening rotating shaft to drive the first turning arm 17 to rotate downward, so that the opening coupling rotating seat 16 rotates clockwise, and the opening coupling connected to the opening coupling rotating seat 16 moves and rotates to drive the permanent magnetic mechanism and the pole of the circuit breaker to lift up to realize the opening action.

[0044] When the opening transmission shaft 5 is driven to rotate by the opening operation of the opening operating shaft 6, the indicating baffle 15 installed on the opening transmission shaft 5 rotates together, and the indicating baffle 15 is misaligned with the opening indicating hole of the cabinet. As the opening transmission part 1 completes the opening action of the vacuum circuit breaker through the permanent magnet mechanism, the indicating baffle 15 is completely misaligned with the opening indicating hole of the cabinet, and the opening indicating hole is in an open state, so that the operator can intuitively understand whether the opening action is carried out smoothly.

[0045] While the opening operation shaft 6 drives the opening transmission shaft 5 to rotate for the opening operation, the opening transmission shaft 5 drives the protective link 20 to move upward on the protective bracket through the third crank arm 21, and the protective link 20 controls the interlocking protective baffle 22 to rotate clockwise along the rotating shaft 23. During the rotation of the interlocking protective baffle 22, the interlocking protective baffle 22 and the operating hole of the isolating switch are gradually staggered. When the opening transmission part 1 completes the opening action of the vacuum circuit breaker through the permanent magnet mechanism, the interlocking protective baffle 22 is completely staggered with the operating hole of the isolating switch, and the operating hole of the isolating switch is in an open and connectable operating state. At this time, the operator can insert the isolating switch operating component through the isolating switch operating hole to operate the isolating switch to perform an action.

[0046] When the lock protection baffle 22 is in the open state, the protection reset spring 26 connected between the protection reset fixing column 25 and the protection reset connecting column 24 pulls up and fixes the lock protection baffle 22, so that the lock protection baffle 22 remains in the open state, thereby preventing the lock protection baffle 22 from rebounding and covering the isolating switch operating hole when the circuit breaker is in the open state, thereby affecting the operator's normal operation of the isolating switch.

[0047] After completing the manual opening operation, the operator pulls out the manual opening operating handle, loosens the connection of the opening operating shaft 6, and under the reset action of the opening reset spring 13, pulls the opening reset connecting column 11 toward the opening reset fixed column 12, so that the opening transmission paddle 9 is reset upward and drives the opening operating shaft 6 to rotate clockwise, and the opening pressure rod 10 is separated from the opening driven paddle 8 until the opening operating shaft 6 is driven to rotate and reset to the initial position.

[0048] When the fault is eliminated or the maintenance is completed, when the permanent magnet mechanism controls the circuit breaker to close, the opening shaft of the permanent magnet mechanism rotates counterclockwise, and the opening transmission shaft 5 of the opening operation linkage part 2 is driven to reset through the opening transmission part 1, and the indicating baffle 15 at the front end of the opening transmission shaft 5 is reset synchronously, and the indicating baffle 15 closes the opening indication hole. At the same time, the opening operation linkage part 2 drives the protection link 20 of the opening interlocking protection part 3 to move downward, and the interlocking protection baffle 22 is rotated counterclockwise and reset through the protection link 20, and under the reset action of the protection reset spring 26, the protection reset fixing column 25 drives the protection reset connecting column 24 to reset so that the interlocking protection baffle 22 is firmly maintained in the reset shielding position, and the interlocking protection baffle 22 accurately closes the disconnector operation hole.

[0049] Second embodiment:

[0050] This embodiment is similar to the first embodiment, except that the distance between the opening switch operating shaft 6 and the opening switch coupling rotating seat 16 in this embodiment can be selected to be set to a position 300 mm downward from the opening switch coupling rotating seat 16, so that the opening switch operating shaft 6 is set at a height of 1.2 from the bottom of the cabinet of the power distribution switch cabinet. Through the position design of the opening switch operating shaft 6 in this embodiment, operators of different statures can complete the manual opening operation effortlessly and conveniently.

[0051] In this embodiment, the sliding of the protective link 20 includes a longitudinal sliding part 30 and a transverse extension part 31. The longitudinal sliding part 30 is respectively arranged at both ends of the transverse extension part 31. A limiting sliding groove 32 is opened on the longitudinal sliding part 30. The limiting sliding groove 32 and the sliding limiting guide part 33 on the protective bracket are a sliding combination with each other.

[0052] In this embodiment, a switch reset slot 34 is provided at one end of the switch reset connection column 11 and the switch reset fixed column 12, and the switch reset slot 34 is fixedly combined with the connecting end of the switch reset spring 13, so that the switch reset spring 13 can be more firmly connected and installed on the switch reset connection column 11 and the switch reset fixed column 12, and plays a reliable auxiliary reset role. A protection reset slot 35 is provided at one end of the protection reset connection column 24 and the protection reset fixed column 25, and the protection reset slot 35 is fixedly combined with the connecting end of the protection reset spring 26. Through the auxiliary action of the protection reset spring 26, the cooperation between the protection reset connection column 24 and the protection reset fixed column 25 is more firm, and the interlocking protection reset action is more accurately realized, so that the lock protection baffle 22 can be maintained in an open and closed state more stably, and the safe operation of the equipment and normal inspection and maintenance operations are guaranteed.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A manual interlocking tripping mechanism for a permanent magnetic circuit breaker, characterized in that: The invention comprises a switch-off transmission part (1), a switch-off operation linkage part (2) and a switch-off interlocking protection part (3) mounted on a circuit breaker frame, wherein the switch-off operation linkage part (2) is connected to the switch-off transmission part (1) and the switch-off interlocking protection part (3) in an interlocking transmission manner, the switch-off operation linkage part (2) is arranged below the switch-off transmission part (1), and the switch-off interlocking protection part (3) is arranged below the switch-off operation linkage part (2), a switch-off transmission shaft (5) and a switch-off operation shaft (6) are mounted in a switch-off bracket (4) of the switch-off operation linkage part (2), and one end of the switch-off transmission shaft (5) is mounted on a transmission shaft fixing seat (7) of the circuit breaker frame. The other end of the opening switch transmission shaft (5) is provided with an indicating baffle (15), the opening switch transmission shaft (5) is provided with an opening switch driven paddle (8), the opening switch operating shaft (6) is provided with an opening switch transmission paddle (9), a opening switch pressure rod (10) is provided on the transmission side of the opening switch transmission paddle (9), the opening switch pressure rod (10) cooperates with the opening switch driven end of the opening switch driven paddle (8), a opening switch reset connecting column (11) is provided on the opening switch transmission paddle (9), a opening switch reset fixing column (12) is provided in the opening switch bracket (4), and the opening switch reset connecting column (11) and the opening switch reset fixing column (12) are connected via an opening switch reset spring (13). The connecting end of the opening switch operating shaft (6) is provided with an operating connection clamping column (14); the opening switch coupling shaft rotating seat (16) of the opening switch transmission part (1) is mounted on the upper end of the circuit breaker frame and is combined with the opening switch coupling of the permanent magnet mechanism; the opening switch connection end of the opening switch coupling shaft rotating seat (16) is combined with a first crank arm (17); the first crank arm (17) is combined with a second crank arm (19) through an opening switch connecting rod (18); the second crank arm (19) is combined with the opening switch transmission shaft (5); the protection connecting rod (20) of the opening switch interlocking protection part (3) is slidably mounted on a protection bracket; one end of the protection connecting rod (20) is connected to the opening switch via a third crank arm (21). The protective connecting end of the protective link (20) is rotatably combined with the interlocking protective baffle (22), the interlocking protective baffle (22) is connected to the rotating shaft (23), the interlocking protective baffle (22) rotates around the rotating shaft (23), the interlocking protective baffle (22) is arranged on the connecting side of the isolating switch operating shaft, a protective reset connecting column (24) is installed on the interlocking protective baffle (22), a protective reset fixing column (25) is provided on one side of the protective connecting end of the protective link (20), and a protective reset spring (26) is connected and installed between the protective reset connecting column (24) and the protective reset fixing column (25).

2. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to claim 1 is characterized in that: The distance between the opening switch operating shaft (6) and the opening switch coupling rotating seat (16) is set to a position where the opening switch coupling rotating seat (16) is a distance h=280-320 mm downward.

3. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to one of claims 1 or 2, characterized in that: The switch opening operating shaft (6) is arranged at a height H=1.2-1.4 m from the bottom of the cabinet.

4. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to claim 1 is characterized in that: The indicating baffle (15) is aligned with the switch-off indicating hole of the cabinet, and the protection portion of the interlocking protection baffle (22) is aligned with the isolating switch operating hole of the cabinet.

5. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to claim 1 is characterized in that: A combined sleeve (27) is installed in the opening brake coupling shaft rotating seat (16) via a rotating connection bearing, and a opening brake coupling shaft combined clamping hole (28) is provided in the connecting end of the combined sleeve (27).

6. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to claim 5, characterized in that: The combination end of the combination sleeve (27) is provided with a switch-off connection column (29), and the combination hole of the switch-off connection column (29) and the first crank arm (17) forms a limit transmission combination.

7. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to claim 6, characterized in that: Rotation limit surfaces are provided on both sides of the opening switch connection column (29), and a transmission limit surface is provided on the inner side of the combination hole, and the transmission limit surface is limitedly matched with the rotation limit surface.

8. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to claim 1, characterized in that: The protective connecting rod (20) comprises a longitudinal sliding portion (30) and a transverse extension portion (31), wherein the longitudinal sliding portion (30) is respectively arranged at two ends of the transverse extension portion (31), and a limiting sliding groove (32) is formed on the longitudinal sliding portion (30), and the limiting sliding groove (32) and the sliding limiting guide portion (33) on the protective bracket are mutually slidably assembled.

9. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to claim 1, characterized in that: One end of the switch-off reset connecting column (11) and the switch-off reset fixing column (12) is provided with a switch-off reset slot (34), and the switch-off reset slot (34) is fixedly combined with the connecting end of the switch-off reset spring (13); one end of the protection reset connecting column (24) and the protection reset fixing column (25) is provided with a protection reset slot (35), and the protection reset slot (35) is fixedly combined with the connecting end of the protection reset spring (26).

10. The interlocking manual opening mechanism of a permanent magnetic circuit breaker according to claim 1, characterized in that: The first crank arm (17) and the second crank arm (19) are connected to the opening switch connecting rod (18) in a rotational transmission manner via an opening switch rotating shaft.

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