Interlocking device with electrical interlocking function and use method thereof

Abstract

The invention relates to an interlocking device with an electrical interlocking function and a using method thereof, an interlocking piece (1), a closing interlocking piece (5) and an opening interlocking piece (6) are installed on an interlocking shaft (4), one end of a closing interlocking rod (19) is in contact with the closing interlocking piece (5), the other end of the closing interlocking rod (19) is in contact with a closing hook plate (16), one end of an opening interlocking rod (7) is in contact with the opening interlocking piece (6), and the other end of the opening interlocking rod (7) is in contact with a tripping bent plate (14). The tripping bending plate (14) is connected with a tripping half shaft (15), the opening interlocking rod (7) is provided with an L-shaped pressing plate (12), the L-shaped pressing plate (12) controls on-off of a microswitch (13), and the microswitch (13) is connected in a closing loop of a circuit breaker in series. Compared with the prior art, it is guaranteed that the circuit breaker cannot be switched on due to misoperation after being switched off mechanically and electrically, the switching-off position of the circuit breaker can be locked at the same time, and inspection, maintenance and other operations are safer after the circuit breaker is switched off.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breakers and relates to an interlocking device with an electrical interlocking function and a use method thereof. Background Art

[0002] With the development of vacuum circuit breakers, the safe operation of switch cabinets has received great attention, and accordingly, the requirements for the safe operation protection functions that vacuum circuit breakers can be equipped with have gradually increased. In order to ensure the safety of operation, the operation of high-voltage switches must follow a certain operation sequence, that is, when closing the switch, close the disconnector first, then the circuit breaker; when opening the switch, open the circuit breaker first, then the disconnector, otherwise misoperation will occur, causing accidents. According to the current "3.6kV ~ 40.5kV AC Metal-Enclosed Switchgear and Control Equipment" (GB / T 3906-2020) standard, high-voltage circuit breakers and high-voltage disconnectors placed in the cabinet must have interlocking protection. Existing mechanisms can be equipped with interlocking protection, but this interlocking protection can only open the circuit breaker from a mechanical structure, and mechanically lock the circuit breaker in the open state, but from an electrical principle, electrical interlocking protection cannot be achieved.

[0003] Patent CN203983080U discloses a mechanical interlocking device for a circuit breaker, which has an interlocking rod, which is arranged on the top of the circuit breaker box through two supporting bent plates, and the interlocking rod is provided with a crank arm I, a crank arm II and a limit device at the position between the two supporting bent plates, and the lower part of the opening interlocking rod passes through the guide plate I arranged on the circuit breaker box and makes the contact piece contact with the micro switch arranged on the guide plate I to cut off the closing circuit through the normally closed point; the crank arm II is connected to the upper end of the closing interlocking rod with a baffle plate thereon, and the lower part of the closing interlocking rod passes through the guide plate II arranged on the circuit breaker box to limit the closing semi-axis, one end of the reset spring is fixedly connected to the lower end of the baffle plate, and the other end of the reset spring is placed in the guide hole of the guide plate II. However, the closing interlocking rod of the patent limits the installation of the closing lock of the circuit breaker. Since if the closing lock needs to be configured in the structure of the circuit breaker, its installation position interferes with its closing interlocking rod, so the two cannot be installed at the same time.

[0004] Patent CN207441568U discloses a vacuum circuit breaker, including a circuit breaker frame, a shaft interlocking device, a micro switch connected in series in the circuit breaker closing circuit and driven by the shaft interlocking device, and an operating mechanism. The operating mechanism includes an opening half-shaft and a closing half-shaft arranged on the circuit breaker frame. The shaft interlocking device includes an opening interlocking mechanism fixedly arranged on the circuit breaker frame, a closing interlocking mechanism and an interlocking shaft rotatably arranged on the circuit breaker frame. The opening interlocking mechanism is driven by the interlocking shaft and drives the opening half-shaft to move. The closing interlocking mechanism is driven by the interlocking shaft and drives the closing half-shaft to move. Features: It also includes a position adjustment structure, and the micro switch is arranged on the position adjustment structure and can be freely adjusted up and down. However, the interlocking device of the patent is installed inside the circuit breaker. The adjustment and disassembly of the interlocking device must be performed after the circuit breaker panel is disassembled. Unnecessary misoperation may occur when non-professionals perform adjustment and disassembly inside the circuit breaker. Therefore, the structure of the mechanical interlocking has a safety hazard in operation adjustment; and the closing interlocking rod's closing semi-axis limiting function also limits the installation of the circuit breaker closing lock. If a closing lock is required in the structure of the circuit breaker, its installation position interferes with its closing interlocking rod, so the two cannot be installed at the same time. Summary of the invention

[0005] The purpose of the present invention is to provide an interlocking device with an electrical interlocking function and a method of using the same in order to overcome at least one defect of the above-mentioned prior art. The present invention can open the circuit breaker from a mechanical structure, and ensure that the circuit breaker will not be closed due to erroneous operation after opening from both mechanical and electrical aspects. At the same time, the circuit breaker can be locked in the open position, making inspection and maintenance operations after the circuit breaker is opened safer.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] One of the technical solutions of the present invention is to provide an interlocking device with an electrical interlocking function, comprising an interlocking assembly, a closing assembly and an opening assembly, which is installed on an operating mechanism of a circuit breaker, wherein the interlocking assembly comprises an interlocking shaft and an interlocking plate, the closing assembly comprises a closing interlocking plate, a closing interlocking rod and a closing hook plate, the opening assembly comprises an opening interlocking plate, an opening interlocking rod, a tripping bent plate, a tripping half-shaft, an L-shaped pressure plate and a micro switch, the interlocking shaft is provided with an interlocking plate, a closing interlocking plate and an opening interlocking plate, one end of the closing interlocking rod contacts the closing interlocking plate, and the other end contacts the closing hook plate, one end of the opening interlocking rod contacts the opening interlocking plate, and the other end contacts the tripping bent plate, the tripping bent plate is connected to the tripping half-shaft, and the opening interlocking rod is provided with an L-shaped pressure plate, the L-shaped pressure plate controls the micro switch, and the micro switch is connected in series in the closing circuit of the circuit breaker.

[0008] As a preferred technical solution, a disconnect screw is installed on the disconnect interlocking plate.

[0009] As a preferred technical solution, a screw hole is opened on the opening interlocking plate, and an opening screw is installed in the screw hole.

[0010] Furthermore, a nylon bracket is installed on the top plate of the circuit breaker mechanism, the interlocking shaft passes through the nylon bracket, and a retaining spring is installed on the nylon bracket to fix the lateral position of the interlocking shaft.

[0011] Furthermore, a closing position bracket and an opening position bracket are installed on the back plate of the circuit breaker mechanism, the closing interlock rod passes through the top plate of the circuit breaker mechanism and the closing position bracket, and the opening interlock rod passes through the top plate of the circuit breaker mechanism and the opening position bracket.

[0012] Furthermore, a micro switch is installed on the opening position bracket.

[0013] Furthermore, one end of a positioning shaft is mounted on the side plate of the intermediate mechanism of the circuit breaker, the other end of the positioning shaft is connected to the closing hook plate, and a reset torsion spring is sleeved on the positioning shaft.

[0014] Furthermore, the closing interlock rod is installed on the closing position bracket through a cotter pin, a baffle and a closing reset spring to control the assembly height, and the opening interlock rod is installed on the opening position bracket through a cotter pin, a baffle and an opening reset spring to control the assembly height.

[0015] Further, the circuit breaker includes a closing module and an opening module, the closing module includes a closing button, a closing electromagnet, a closing bent plate, a closing screw, a closing connecting rod and an energy storage latch, and the opening module includes an opening button, an opening electromagnet, a closing bent plate, an opening connecting rod and a closing holding latch;

[0016] One end of the closing electromagnet contacts the closing button, and the other end contacts the closing bent plate. The closing bent plate is provided with a closing screw. The closing hook plate controls the closing bent plate by hooking the closing screw. The closing bent plate is connected to the closing connecting rod. The energy storage latch is unlocked by rotating the closing connecting rod.

[0017] One end of the opening electromagnet contacts the opening button, and the other end contacts the opening bent plate. The tripping half-shaft is connected to the opening bent plate. The tripping bent plate drives and controls the opening bent plate through the tripping half-shaft. The opening bent plate is connected to the opening connecting rod, and the closing holding latch is unlocked by rotating the opening connecting rod.

[0018] Furthermore, the closing button actuates the closing electromagnet or the closing electromagnet is energized, the closing electromagnet pushes the closing bent plate, the closing bent plate drives the closing connecting rod, the closing connecting rod rotates to unlock the energy storage latch, and the circuit breaker closes;

[0019] The opening button actuates the opening electromagnet or the opening electromagnet is energized, the opening electromagnet pushes the opening bent plate, the opening bent plate drives the opening connecting rod, the opening connecting rod rotates to unlock the closing holding latch, and the circuit breaker opens;

[0020] The opening interlocking rod presses down the tripping bent plate, and the tripping bent plate drives the tripping half-shaft to rotate. The tripping half-shaft drives the opening bent plate, and the opening bent plate drives the opening connecting rod. The opening connecting rod rotates to unlock the closing holding latch, and the circuit breaker opens.

[0021] One of the technical solutions of the present invention is to provide a method for using an interlocking device with an electrical interlocking function, the method comprising the following steps:

[0022] When the circuit breaker is in the open state, the interlocking device is activated, the interlocking piece rotates upward, the interlocking shaft rotates, and the closing interlocking piece is driven to press the closing interlocking rod downward, and the closing interlocking rod moves downward, driving the closing hook plate to rotate, and the closing hook plate hooks the closing screw, and the closing bent plate cannot rotate, and the energy storage latch cannot be unlocked, and the manual pressing of the closing button or the energization of the closing electromagnet cannot be realized, and the closing electromagnet cannot push the closing bent plate, and the circuit breaker cannot be closed, thus limiting the closing of the circuit breaker from the mechanical movement;

[0023] When the interlocking device is canceled, the interlocking plate rotates downward, the interlocking shaft rotates, the closing interlocking plate no longer presses down the closing interlocking rod, the closing reset spring causes the closing interlocking rod to move upward, the reset torsion spring causes the closing hook plate to rotate, the closing hook plate no longer hooks the closing screw, the closing button actuates the closing electromagnet or the closing electromagnet is energized, the closing electromagnet pushes the closing bent plate, the closing bent plate drives the closing connecting rod, the closing connecting rod rotates to unlock the energy storage latch, and the circuit breaker can be closed.

[0024] One of the technical solutions of the present invention is to provide a method for using an interlocking device with an electrical interlocking function, the method comprising the following steps:

[0025] When the circuit breaker is in the closed state, the interlocking device is activated, the interlocking piece rotates upward, the interlocking shaft rotates, and the opening interlocking piece is driven to press down the opening interlocking rod, the opening interlocking rod moves downward and presses down the tripping bent plate, the tripping bent plate drives the tripping half-shaft to rotate, the tripping half-shaft drives the opening bent plate, the opening bent plate drives the opening connecting rod, the opening connecting rod rotates to unlock the closing holding latch, the circuit breaker is opened and the circuit breaker is locked in the open position;

[0026] When the circuit breaker is in the open state, the interlocking device is activated, the interlocking piece rotates upward, the interlocking shaft rotates, and the open interlocking piece presses down the open interlocking rod. The open interlocking rod moves downward and abuts against the tripping bent plate, and the circuit breaker is locked in the open position;

[0027] Regardless of the state of the circuit breaker, after the interlocking device is activated, the circuit breaker will be locked in the open position;

[0028] The L-shaped pressure plate on the opening interlocking rod presses down the contact of the micro switch, and the micro switch switches to a normally open contact, and the closing circuit cannot be connected, thus electrically limiting the closing of the circuit breaker;

[0029] When the interlocking device is canceled, the interlocking plate rotates downward, the interlocking shaft rotates, the opening interlocking plate no longer presses down the opening interlocking rod, the interlocking shaft drives the opening interlocking plate to rotate until the opening screw on the opening interlocking plate presses against the chassis, the opening reset spring moves the opening interlocking rod upward, the opening interlocking rod no longer presses down the tripping bent plate, the L-shaped pressure plate no longer presses down the contacts of the microswitch, the microswitch switches to a normally closed contact, the circuit breaker opening position lock is canceled, the closing circuit can be connected after the energy storage is completed, and the circuit breaker can be closed.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The present invention is used for interlocking protection of high-voltage circuit breakers and high-voltage disconnectors. Compared with the existing mechanical interlocking device, the opening interlocking plate in the interlocking device drives the opening interlocking rod to move downward, and the tripping half-shaft with the tripping bent plate installed rotates. At the same time, the opening interlocking rod abuts against the tripping bent plate on the tripping half-shaft, so that the circuit breaker can be opened and the circuit breaker can be mechanically locked in the open state. The L-shaped pressure plate on the opening interlocking rod presses down the micro switch contact to cut off the closing circuit. In terms of electricity, the function of preventing the circuit breaker from closing by mistake is also realized, making the operation of the circuit breaker in the switch cabinet safer and more reliable;

[0032] (2) In the circuit breaker structure targeted by the present invention, if a closing lock is installed, the closing lock is installed above the closing bent plate to limit the movement of the top end of the closing bent plate, while the closing hook plate in the interlocking device limits the movement of the end of the closing bent plate. There is no interference in the installation of the interlocking device and the closing lock, and they can be installed in one circuit breaker at the same time, providing double insurance for circuit breaker protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A circuit diagram of a circuit breaker in an embodiment of the present invention;

[0034] Figure 2 It is a structural schematic diagram of an interlocking device with an electrical interlocking function in an embodiment of the present invention;

[0035] Figure 3 Schematic diagram of the closing structure of the interlocking device with electrical interlocking function in an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of the opening structure of the interlocking device with electrical interlocking function in an embodiment of the present invention.

[0037] Description of the markings in the figure:

[0038] 1—interlocking plate, 2—nylon bracket, 3—circlip, 4—interlocking shaft, 5—closing interlocking plate, 6—opening interlocking plate, 7—opening interlocking rod, 8—opening pin, 9—blocking plate, 10—opening reset spring, 11—opening position bracket, 12—L-shaped pressure plate, 13—micro switch, 14—tripping bent plate, 15—tripping half shaft, 16—closing hook plate, 17—reset torsion spring, 18—positioning shaft, 19—closing interlocking rod, 20—closing position bracket, 21—closing reset spring, 22—opening screw, 23—opening button, 24—opening electromagnet, 25—opening bent plate, 26—closing holding latch, 27—opening connecting rod, 28—closing screw, 29—closing connecting rod, 30—energy storage latch, 31—closing bent plate, 32—closing button, 33—closing electromagnet. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used to describe common objects, which only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other way.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example:

[0043] An interlocking device with electrical interlocking function, used on the operating mechanism of RMV1 vacuum circuit breaker, such as Figure 1 As shown, the circuit breaker is in a state of no energy storage, open, and interlocking device actuation. A micro switch S4 normally closed contact is connected in series in the circuit breaker closing circuit (the interlocking device actuates so that the micro switch S4 switches to the normally open contact). At this time, the circuit breaker secondary circuit is energized, the energy storage circuit is connected, the motor M is energized, and the mechanism starts to store energy. After the energy storage is completed, the pressure plate inside the mechanism actuates the micro switches S1, S2, and S3, so that the micro switch S1 in the closing circuit switches to the normally closed contact, and S2 and S3 switch to the normally open contact. The micro switch S4 in the closing circuit switches to the normally open contact due to the action of the interlocking device, and the closing circuit cannot be connected, the closing coil HQ cannot be energized, and the circuit breaker cannot be closed. The interlocking device electrically realizes the function of limiting closing. The auxiliary switch QF provides another protection for the circuit breaker, which is a basic function of the circuit breaker and does not need to be explained in the present invention.

[0044] The above interlocking device with electrical interlocking function, such as Figure 2 As shown, it includes an interlocking assembly, a closing assembly and an opening assembly, the interlocking assembly includes an interlocking shaft 4 and an interlocking plate 1, the closing assembly includes a closing interlocking plate 5, a closing interlocking rod 19 and a closing hook plate 16, and the opening assembly includes an opening interlocking plate 6, an opening interlocking rod 7, a tripping bent plate 14, a tripping half shaft 15, an L-shaped pressure plate 12 and a micro switch 13;

[0045] The nylon bracket 2 is fixedly mounted on the top plate of the circuit breaker mechanism, the interlocking shaft 4 passes through the nylon bracket 2, the retaining ring 3 is mounted on the nylon bracket 2 to fix the left and right positions of the interlocking shaft 4, the three grooves on the interlocking shaft 4 are respectively mounted with the interlocking piece 1, the closing interlocking piece 5 and the opening interlocking piece 6, the opening interlocking piece 6 is provided with a screw hole, and the opening screw 22 is installed in the screw hole;

[0046] The closing position bracket 20 and the opening position bracket 11 are fixedly mounted on the back plate of the circuit breaker mechanism, and a micro switch 13 (i.e., micro switch S4) is fixedly mounted on the opening position bracket 11;

[0047] One end of the positioning shaft 18 is riveted to the side plate of the intermediate mechanism of the circuit breaker, and the other end is connected to the closing hook plate 16. The reset torsion spring 17 is sleeved on the positioning shaft 18;

[0048] The tripping bent plate 14 is fixedly mounted on the tripping half shaft 15;

[0049] The closing interlocking rod 19 passes through the top plate of the circuit breaker mechanism and the closing position bracket 20, one end of which contacts the closing interlocking plate 5, and the other end of which contacts the closing hook plate 16;

[0050] The opening interlocking rod 7 passes through the top plate of the circuit breaker mechanism and the opening position bracket 11, one end of which contacts the opening interlocking plate 6, and the other end contacts the tripping bent plate 14. An L-shaped pressing plate 12 is installed in a groove on the opening interlocking rod 7;

[0051] The closing interlock rod 19 is installed on the closing position bracket 20 with a cotter pin 8, a baffle 9 and a closing reset spring 21 and the assembly height is controlled. The opening interlock rod 7 is installed on the opening position bracket 11 with a cotter pin 8, a baffle 9 and an opening reset spring 10 and the assembly height is controlled.

[0052] The circuit breaker includes a closing module and an opening module. The closing module includes a closing button 32, a closing electromagnet 33, a closing bent plate 31, a closing screw 28, a closing connecting rod 29 and an energy storage latch 30. The opening module includes an opening button 23, an opening electromagnet 24, an opening bent plate 25, an opening connecting rod 27 and a closing holding latch 26.

[0053] One end of the closing electromagnet 33 contacts the closing button 32, and the other end contacts the closing bent plate 31. The closing bent plate 31 is provided with a closing screw 28. The closing hook plate 16 controls the closing bent plate 31 by hooking the closing screw 28. The closing bent plate 31 is connected to the closing connecting rod 29. The energy storage latch 30 is unlocked by rotating the closing connecting rod 29.

[0054] One end of the opening electromagnet 24 contacts the opening button 23, and the other end contacts the opening bent plate 25. The tripping half-shaft 15 is connected to the opening bent plate 25. The tripping bent plate 14 drives and controls the opening bent plate 25 through the tripping half-shaft 15. The opening bent plate 25 is connected to the opening connecting rod 27. The closing holding latch 26 is unlocked by rotating the opening connecting rod 27.

[0055] The closing process of the circuit breaker, such as Figure 3 As shown, the specific steps are as follows:

[0056] The closing button 32 actuates the closing electromagnet 33 or the closing electromagnet 33 is energized, the closing electromagnet 33 pushes the closing bent plate 31, the closing bent plate 31 drives the closing link 29, the closing link 29 rotates to unlock the energy storage latch 30, and the circuit breaker is closed.

[0057] The method for using the above interlocking device with electrical interlocking function involves the application of the closing assembly, and the specific steps are as follows:

[0058] When the circuit breaker is in the open state, the interlocking device is activated, the interlocking plate 1 rotates upward, the interlocking shaft 4 rotates counterclockwise, driving the closing interlocking plate 5 to press the closing interlocking rod 19 downward, and the closing interlocking rod 19 moves downward, driving the closing hook plate 16 to rotate counterclockwise, the closing hook plate 16 hooks the closing screw 28, the closing bent plate 31 cannot rotate, and the energy storage latch 30 cannot be unlocked. At this time, whether the closing button 32 is manually pressed or the closing electromagnet 33 is energized, the above closing process cannot be realized, and the circuit breaker cannot be closed, thus limiting the closing of the circuit breaker from the mechanical movement;

[0059] Next, when the interlocking device is cancelled, the interlocking plate 1 rotates downward, the interlocking shaft 4 rotates clockwise, the closing interlocking plate 5 no longer presses down the closing interlocking rod 19, the closing reset spring 21 causes the closing interlocking rod 19 to move upward, and the reset torsion spring 17 causes the closing hook plate 16 to rotate clockwise, and the closing hook plate 16 no longer hooks the closing screw 28. At this time, the energy storage latch 30 can be unlocked and the circuit breaker can be closed.

[0060] The opening process of the circuit breaker, such as Figure 4 As shown, the specific steps are as follows:

[0061] The opening button 23 actuates the opening electromagnet 24 or the opening electromagnet 24 is energized, and the opening electromagnet 24 pushes the opening bent plate 25, and the opening bent plate 25 drives the opening connecting rod 27, and the opening connecting rod 27 rotates to unlock the closing holding latch 26, and the circuit breaker is opened;

[0062] Alternatively, the opening interlocking rod 7 presses down the tripping bent plate 14, the tripping bent plate 14 drives the tripping half-shaft 15 to rotate clockwise, the tripping half-shaft 15 drives the opening bent plate 25, the opening bent plate 25 drives the opening connecting rod 27, the opening connecting rod 27 rotates to unlock the closing holding latch 26, and the circuit breaker opens.

[0063] The method for using the above interlocking device with electrical interlocking function involves the application of the opening switch assembly, and the specific steps are as follows:

[0064] When the circuit breaker is in the closed state, the interlocking device is started, the interlocking piece 1 rotates upward, and the interlocking shaft 4 rotates clockwise, driving the opening interlocking piece 6 to press the opening interlocking rod 7, and the opening interlocking rod 7 moves downward and presses down the tripping bent plate 14, which conforms to the above-mentioned opening process, and the circuit breaker is opened and the circuit breaker is locked in the opening position; when the circuit breaker is in the opening state, the interlocking device is started, the interlocking piece 1 rotates upward, and the interlocking shaft 4 rotates clockwise, driving the opening interlocking piece 6 to press down the opening interlocking rod 7, and the opening interlocking rod 7 moves downward and abuts against the tripping bent plate 14, and the circuit breaker is locked in the opening position; no matter what state the circuit breaker is in, after the interlocking device is started, the circuit breaker will be locked in the opening position; at the same time, the L-shaped pressure plate 12 on the opening interlocking rod 7 presses down the contact of the microswitch 13, and the microswitch 13 switches to a normally open contact, and the closing circuit cannot be connected, thereby electrically limiting the closing of the circuit breaker;

[0065] Then, when the interlocking device is canceled, the interlocking plate 1 rotates downward, the interlocking shaft 4 rotates counterclockwise, the opening interlocking plate 6 no longer presses down the opening interlocking rod 7, and the interlocking shaft 4 drives the opening interlocking plate 6 to rotate until the opening screw 22 on the opening interlocking plate 6 supports the chassis, and the opening reset spring 10 causes the opening interlocking rod 7 to move upward, and the opening interlocking rod 7 no longer presses down the tripping bent plate 14, and the L-shaped pressure plate 12 no longer presses down the contacts of the microswitch 13, and the microswitch 13 switches to a normally closed contact. At this time, the circuit breaker opening position lock is canceled, and the closing circuit can be connected after the energy storage is completed, and the circuit breaker can be closed.

[0066] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. An interlocking device with electrical interlocking function, characterized in that: The invention comprises an interlocking assembly, a closing assembly and an opening assembly, which are installed on the operating mechanism of the circuit breaker, wherein the interlocking assembly comprises an interlocking shaft (4) and an interlocking plate (1), the closing assembly comprises a closing interlocking plate (5), a closing interlocking rod (19) and a closing hook plate (16), and the opening assembly comprises an opening interlocking plate (6), an opening interlocking rod (7), a tripping bent plate (14), a tripping half shaft (15), an L-shaped pressure plate (12) and a micro switch (13), and the interlocking shaft (4) is installed with the interlocking plate (1), the closing interlocking plate (5) and the opening hook plate (16). The opening interlocking plate (6) is provided, one end of the closing interlocking rod (19) contacts the closing interlocking plate (5), and the other end contacts the closing hook plate (16); one end of the opening interlocking rod (7) contacts the opening interlocking plate (6), and the other end contacts the tripping bent plate (14); the tripping bent plate (14) is connected to the tripping half shaft (15); an L-shaped pressing plate (12) is installed on the opening interlocking rod (7); the L-shaped pressing plate (12) controls the switching of a micro switch (13); and the micro switch (13) is connected in series in the closing circuit of the circuit breaker.

2. An interlocking device with electrical interlocking function according to claim 1, characterized in that: A nylon bracket (2) is installed on the top plate of the circuit breaker mechanism, the interlocking shaft (4) passes through the nylon bracket (2), and a retaining spring (3) is installed on the nylon bracket (2), and the retaining spring (3) fixes the lateral position of the interlocking shaft (4).

3. An interlocking device with electrical interlocking function according to claim 1, characterized in that: A closing position bracket (20) and an opening position bracket (11) are mounted on the back plate of the circuit breaker mechanism; the closing interlocking rod (19) passes through the top plate of the circuit breaker mechanism and the closing position bracket (20); and the opening interlocking rod (7) passes through the top plate of the circuit breaker mechanism and the opening position bracket (11).

4. An interlocking device with electrical interlocking function according to claim 3, characterized in that: A micro switch (13) is installed on the opening position bracket (11).

5. An interlocking device with electrical interlocking function according to claim 1, characterized in that: One end of a positioning shaft (18) is mounted on the side plate of the intermediate mechanism of the circuit breaker, the other end of the positioning shaft is connected to a closing hook plate (16), and a reset torsion spring (17) is sleeved on the positioning shaft (18).

6. An interlocking device with electrical interlocking function according to claim 1, characterized in that: The closing interlocking rod (19) is mounted on a closing position bracket (20) via a cotter pin (8), a baffle (9) and a closing reset spring (21), and the opening interlocking rod (7) is mounted on an opening position bracket (11) via a cotter pin (8), a baffle (9) and an opening reset spring (10).

7. An interlocking device with electrical interlocking function according to claim 1, characterized in that: The circuit breaker comprises a closing module and an opening module, wherein the closing module comprises a closing button (32), a closing electromagnet (33), a closing bent plate (31), a closing screw (28), a closing connecting rod (29) and an energy storage latch (30), and the opening module comprises an opening button (23), an opening electromagnet (24), an opening bent plate (25), an opening connecting rod (27) and a closing holding latch (26); One end of the closing electromagnet (33) contacts the closing button (32), and the other end contacts the closing bent plate (31); a closing screw (28) is provided on the closing bent plate (31); the closing hook plate (16) controls the closing bent plate (31) by hooking the closing screw (28); the closing bent plate (31) is connected to the closing connecting rod (29); and the energy storage latch (30) is unlocked by rotating the closing connecting rod (29); One end of the opening electromagnet (24) contacts the opening button (23), and the other end contacts the opening bent plate (25); the tripping half-shaft (15) is connected to the opening bent plate (25); the tripping bent plate (14) drives and controls the opening bent plate (25) through the tripping half-shaft (15); the opening bent plate (25) is connected to the opening connecting rod (27); and the closing holding latch (26) is unlocked by rotating the opening connecting rod (27).

8. An interlocking device with electrical interlocking function according to claim 7, characterized in that: The closing button (32) actuates the closing electromagnet (33) or the closing electromagnet (33) is energized, the closing electromagnet (33) pushes the closing bent plate (31), the closing bent plate (31) drives the closing connecting rod (29), the closing connecting rod (29) rotates to unlock the energy storage latch (30), and the circuit breaker is closed; The opening button (23) actuates the opening electromagnet (24) or the opening electromagnet (24) is energized and actuated, the opening electromagnet (24) pushes the opening bent plate (25), the opening bent plate (25) drives the opening connecting rod (27), the opening connecting rod (27) rotates to unlock the closing holding latch (26), and the circuit breaker is opened; The opening interlocking rod (7) presses down the tripping bent plate (14), and the tripping bent plate (14) drives the tripping half-shaft (15) to rotate. The tripping half-shaft (15) drives the opening bent plate (25), and the opening bent plate (25) drives the opening connecting rod (27). The opening connecting rod (27) rotates to unlock the closing holding latch (26), and the circuit breaker is opened.

9. A method for using an interlocking device with an electrical interlocking function as claimed in any one of claims 1 to 8, characterized in that: The method comprises the following steps: When the circuit breaker is in the open state, the interlocking device is activated, the interlocking plate (1) rotates upward, the interlocking shaft (4) rotates, and the closing interlocking plate (5) is driven to press down the closing interlocking rod (19). The closing interlocking rod (19) moves downward, driving the closing hook plate (16) to rotate. The closing hook plate (16) hooks the closing screw (28), and the closing bent plate (31) cannot rotate, and the energy storage latch (30) cannot be unlocked. Manually pressing the closing button (32) or the closing electromagnet (33) to obtain power cannot be realized. The closing electromagnet (33) cannot push the closing bent plate (31), thereby limiting the closing of the circuit breaker; When the interlocking device is cancelled, the interlocking plate (1) rotates downward, the interlocking shaft (4) rotates, the closing interlocking plate (5) no longer presses down the closing interlocking rod (19), the closing reset spring (21) causes the closing interlocking rod (19) to move upward, the reset torsion spring (17) causes the closing hook plate (16) to rotate, the closing hook plate (16) no longer hooks the closing screw (28), the closing button (32) actuates the closing electromagnet (33) or the closing electromagnet (33) is electrically actuated, the closing electromagnet (33) pushes the closing bent plate (31), the closing bent plate (31) drives the closing connecting rod (29), the closing connecting rod (29) rotates to unlock the energy storage latch (30), and the circuit breaker is closed.

10. A method for using an interlocking device with an electrical interlocking function as claimed in any one of claims 1 to 8, characterized in that: The method comprises the following steps: When the circuit breaker is in a closed state, the interlocking device is activated, the interlocking plate (1) rotates upward, the interlocking shaft (4) rotates, and drives the opening interlocking plate (6) to press down the opening interlocking rod (7), the opening interlocking rod (7) moves downward and presses down the tripping bent plate (14), the tripping bent plate (14) drives the tripping half shaft (15) to rotate, the tripping half shaft (15) drives the opening bent plate (25), the opening bent plate (25) drives the opening connecting rod (27), the opening connecting rod (27) rotates to unlock the closing holding latch (26), the circuit breaker is opened, and the circuit breaker is locked in the open position; When the circuit breaker is in the open state, the interlocking device is activated, the interlocking plate (1) rotates upward, the interlocking shaft (4) rotates, and drives the open interlocking plate (6) to press down the open interlocking rod (7), and the open interlocking rod (7) moves downward and abuts against the tripping bent plate (14), and the circuit breaker is locked in the open position; The L-shaped pressure plate (12) on the opening interlocking rod (7) presses down the contact of the micro switch (13), and the micro switch (13) switches to a normally open contact, thereby limiting the closing of the circuit breaker; When the interlocking device is cancelled, the interlocking plate (1) rotates downward, the interlocking shaft (4) rotates, the opening interlocking plate (6) no longer presses down the opening interlocking rod (7), the interlocking shaft (4) drives the opening interlocking plate (6) to rotate until the opening screw (22) on the opening interlocking plate (6) presses against the chassis, the opening reset spring (10) causes the opening interlocking rod (7) to move upward, the opening interlocking rod (7) no longer presses down the tripping bent plate (14), the L-shaped pressure plate (12) no longer presses down the contact of the micro switch (13), the micro switch (13) switches to a normally closed contact, and the circuit breaker opening position lock is cancelled.

Images