A terminal-integrated hydraulic electromagnetic circuit breaker

Abstract

The present invention provides a terminal-integrated hydraulic electromagnetic circuit breaker, comprising an upper shell and a lower shell that are spliced ​​and docked together; an operating mechanism, a connecting plate, a tripping device, a busbar, an arc extinguishing plate, a button, a base, a plug-in plate 1, and a plug-in plate 2 are installed in the lower shell; the base is buckled on the bottom of the lower shell, and two parallel areas are provided inside the base, each area is provided with a wire insertion hole, a wire pressing hole, and a spring sheet, a pressing block is provided in the wire pressing hole, and the spring sheet is arranged near the inner side of the wire pressing hole; one end of the plug-in plate 1 and the plug-in plate 2 are respectively installed in the two areas of the base and connected to the spring sheet in the area, and the other end extends out of the base; the part of the plug-in plate 1 extending out of the base is located directly below the connecting plate and is connected to the connecting plate by bolts. After the present invention integrates the wiring terminal and the hydraulic electromagnetic circuit breaker, the operation of wiring between the circuit breaker and the wiring terminal is omitted, making the wiring simpler and more convenient, saving time and labor costs.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic electromagnetic circuit breakers, and in particular relates to a hydraulic electromagnetic circuit breaker with integrated terminals. Background Art

[0002] The power-off protection part of traditional electrical circuits is mainly fuses, which are used to achieve power-off protection and connected to terminals to form wiring and power-off functions. This type of fuse has a high scrap rate. Based on the cost of 3.1 yuan for a single fuse and an annual usage of 200,000 pieces, the annual cost of fuses is 200,000*3.1=620,000 yuan. Moreover, the fuse needs to be replaced after each power outage, and the loading and unloading operations are inconvenient.

[0003] Therefore, at present, in telecommunication rooms or communication cabinets, hydraulic electromagnetic circuit breakers are mostly used instead of fuses as isolation, short-circuit and overload protection devices for cabinets, rooms or downstream user lines; hydraulic electromagnetic circuit breakers mainly realize power-off protection through the action of operating mechanisms and hydraulic electromagnetic tripping devices; when the circuit is overloaded or short-circuited, the induction coil of the hydraulic electromagnetic tripping device generates a magnetic field to move the magnetic core in the oil cup to the other end and attract the armature of the operating mechanism, and the armature drives the rotating part of the operating mechanism to rotate, thereby driving the moving contact and the static contact to disengage, thereby cutting off the circuit. When the hydraulic electromagnetic circuit breaker and the protected electrical components are connected by wires, in order to make the wiring beautiful, convenient for connecting and disconnecting the wires, easy for maintenance, and reliable for long-distance wires, some special wiring terminals are usually required as transitions between the circuit breaker and the protected electrical components. These wiring terminals are combined and are called terminal blocks; wires are connected between the terminal block and the circuit breaker, and between the terminal block and the protected electrical components; however, if the number of circuit breakers and protected electrical components is large, the number of wires between the circuit breaker and the terminal block will be even greater. It is very troublesome to connect, disconnect, and repair the wires between the circuit breaker and the terminal block every time. Summary of the invention

[0004] In view of the above problems, the present invention provides an integrated design of the existing hydraulic electromagnetic circuit breaker and the terminal, thereby effectively reducing the difficulty of wire connection, wire breakage and maintenance, and a terminal-integrated hydraulic electromagnetic circuit breaker with convenient operation and loading and unloading to solve the above problems. The specific technical solution is as follows:

[0005] A terminal-integrated hydraulic electromagnetic circuit breaker comprises an upper shell and a lower shell that are joined together; an operating mechanism, a connecting plate, a tripping device, a busbar, an arc extinguishing plate, and a button are installed in the lower shell; the characteristic is that it also comprises a base, a first plug-in plate, and a second plug-in plate; the base is buckled on the bottom of the lower shell, and two parallel areas are arranged inside the base, each area is provided with a wire insertion hole, a wire pressing hole, and a spring sheet, a pressing block is arranged in the wire pressing hole, and the spring sheet is arranged near the inner side of the wire pressing hole; one end of the first plug-in plate and the second plug-in plate are respectively installed in the two areas of the base and connected to the spring sheet in the area, and the other end extends out of the base; the part of the first plug-in plate extending out of the base is located directly below the connecting plate and is connected to the connecting plate by bolts.

[0006] Specifically, the operating mechanism includes a frame and a rotating part, an armature, and a moving contact hinged on the frame; the armature and the moving contact are hinged at both ends of the rotating part respectively; a static contact is provided on the connecting plate at a position corresponding to the moving contact; the tripping device is fixedly connected to the side of the frame; the armature is driven by the tripping device and then drives the rotating part to rotate to disengage the moving contact from the static contact of the connecting plate; the busbar is connected to one end of the tripping device close to the armature; the arc extinguishing piece is fixed to the side of the moving contact and the static contact through a slot arranged on the upper and lower shells; the button is installed on the side of the upper shell and the lower shell and connected to the armature, and pressing the button left and right can make the armature contact or disengage with the tripping device, and at the same time drive the moving contact to disengage or contact with the static contact.

[0007] Furthermore, the tripping device includes an outer frame fixed to one side of the frame, an oil cup mounted on the outer frame, a magnetic core disposed in the oil cup and movable in the oil cup; an induction coil sleeved on the outside of the oil cup; a pole shoe disposed at the end of the oil cup and close to the armature; a spring disposed in the oil cup and between the magnetic core and the pole shoe, and a liquid medium. When the circuit is overloaded or short-circuited, current flows through the induction coil. At this time, the magnetic flux generated by the induction coil causes the magnetic core in the oil cup to move to the pole shoe at the other end, causing the armature to be immediately attracted by the pole shoe, thereby driving the rotating part to rotate so that the moving contact is separated from the static contact of the connecting plate, causing the circuit breaker to trip. After the overload or short-circuit fault is resolved, the button is pressed to make the moving contact re-contact with the static contact of the connecting plate, and the circuit is connected.

[0008] Furthermore, the pressing block is tightly matched with the wire pressing hole.

[0009] Furthermore, the inner end of the pressing block (the end facing the inside of the wire pressing hole) is provided with a 1mm undercut (equivalent to a circle thickened around the inner end of the pressing block). In this way, after the pressing block is pressed in, the undercut fits tightly with the wire pressing hole, and the pressing block will not fall out, ensuring a secure connection.

[0010] The present invention is based on the existing hydraulic electromagnetic circuit breaker, and the connection terminal is integrated with the existing hydraulic electromagnetic circuit breaker, which effectively reduces the difficulty of wire connection, wire breaking and maintenance, and makes operation and assembly and disassembly convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a terminal-integrated hydraulic electromagnetic circuit breaker of the present invention;

[0012] Figure 2 This is a schematic diagram of the internal structure of the lower housing of a terminal-integrated hydraulic electromagnetic circuit breaker of the present invention;

[0013] Figure 3 It is a structural schematic diagram of a tripping device in a terminal-integrated hydraulic electromagnetic circuit breaker of the present invention;

[0014] As shown in the figure: 1-wire insertion hole, 2-wire pressing hole, 3-spring sheet, 4-base, 5-bolt, 6-insertion sheet one, 7-insertion sheet two, 8-arc extinguishing sheet, 9-connecting plate, 10-bus, 11-operating mechanism, 1101-frame, 1102-armature, 1103-rotating part, 1104-moving contact, 12-lower shell, 13-tripping device, 1301-outer frame, 1302-oil cup, 1303-magnetic core, 1304-induction coil, 1305-spring, 1306-liquid medium, 1307-pole shoe, 14-indicator light, 15-button, 16-upper shell. DETAILED DESCRIPTION

[0015] The principles and features of the present invention are further described in detail below in conjunction with the accompanying drawings. The examples given are only used to explain the invention and are not used to limit the scope of the invention.

[0016] like Figure 1The terminal-integrated hydraulic electromagnetic circuit breaker of the present invention shown in the figure comprises an upper shell 16 and a lower shell 12 which are assembled and docked together; an operating mechanism 11, a connecting plate 9, a tripping device 13, a busbar 10, an arc extinguishing sheet 8, and a button 15 are installed in the lower shell 12; it also comprises a base 4, a plug-in piece 6, and a plug-in piece 7; the base 4 is buckled on the bottom of the lower shell 12, and two parallel areas are arranged inside the base 4, each area is provided with a wire insertion hole 1, a wire pressing hole 2, and a spring sheet 3, a pressing block is arranged in the wire pressing hole 2 (the pressing block is tightly matched with the wire pressing hole 2), and the spring sheet 3 is arranged near the inner side of the wire pressing hole 2; one end of the plug-in piece 1 6 and the plug-in piece 2 7 are respectively installed in the two areas of the base 4 and connected to the spring sheet 3 in the area, while the other end extends out of the base 4; the part of the plug-in piece 6 extending out of the base 4 is located directly below the connecting plate 9 and is connected to the connecting plate 9 through a bolt 5. According to common sense, the socket 1 corresponding to the area where the plug 1 6 is located is connected to the live wire (the positive pole can be marked on the negative pole of the socket 1 as "+"), and the socket 1 corresponding to the area where the plug 2 7 is located is connected to the neutral wire (the negative pole can be marked on the negative pole of the socket 1 as "-").

[0017] When wiring, connect the positive pole of the wire into the plug hole 1 according to the negative pole mark near the plug hole 1 corresponding to the plug piece 6, so that the wire enters the area where the plug piece 6 is located and contacts the plug piece 6, and at the same time, the wire contacts the spring piece 3 in the area (the end of the wire is located between the spring piece 3 and the wire pressing hole 2), and then use a tool to push the pressure block (which can be set to black) in the wire pressing hole 2 corresponding to the area where the plug piece 6 is located; that is, the wire is pressed tightly against the spring piece 3, and after stopping pushing the pressure block, the wire and the spring piece 3 that are in contact with each other are clamped by the elastic force of the spring piece 3; the plug piece 6 at the positive end of the wire is connected to the circuit breaker connection plate 9 by a screw 5, so that the current can be disconnected and tripped, thereby playing a circuit protection role.

[0018] Similarly, connect the negative pole of the wire into the wire insertion hole 1 according to the negative pole mark near the wire insertion hole 1 corresponding to the plug-in piece 2 7, so that the wire enters the area where the plug-in piece 2 7 is located and contacts the plug-in piece 2 7, and at the same time, the wire contacts the spring sheet 3 in the area (the end of the wire is located between the spring sheet 3 and the wire pressing hole 2), and then use a tool to push the pressure block (which can be set to blue) in the wire pressing hole 2 corresponding to the area where the plug-in piece 2 7 is located; that is, the wire is pressed tightly against the spring sheet 3, and after stopping pushing the pressure block, the wire and the spring sheet 3 that are in contact with each other are clamped under the action of the elastic force of the spring sheet 3.

[0019] For the convenience of observation, an indicator light 14 can also be connected to the circuit breaker of the present application (the connection method of the indicator light 14 is the same as that of the conventional hydraulic electromagnetic circuit breaker); the circuit breaker pushes the operating mechanism 11 through the principle of electromagnetic action to achieve electromagnetic tripping (that is, the moving contact 1104 is disengaged from the static contact 91). At this time, the circuit breaker button is in the "OFF" state, the circuit is disconnected, and the indicator light is red. When the circuit is connected, it is necessary to manually press the button switch to the "ON" state to connect the circuit, the red indicator light disappears, and it is displayed in blue; after the circuit is connected, the current is connected to the chassis circuit bus through the bus 10, and the arc generated at the moment of contact between the moving contact 1104 and the static contact 91 is extinguished through the arc extinguishing piece 8, thereby achieving the effect of electricity safety.

[0020] After the present invention integrates the wiring terminal and the hydraulic electromagnetic circuit breaker into one, the new structure obtained also has the advantages of the wiring terminal, which can make the wiring beautiful, facilitate the connection and disconnection of the wires, and facilitate maintenance. It can also make the connection between long-distance wires reliable. Moreover, after integration, the wiring operation between the circuit breaker and the wiring terminal is omitted, making the wiring simpler and more convenient, saving time and labor costs. In particular, the terminal-integrated hydraulic electromagnetic circuit breaker of the present invention is arranged side by side on a board, and the effect is better, which can directly save the existing wiring terminals and a large number of wires; making the connection between the circuit breaker and the electrical components more convenient, beautiful, and simpler to maintain.

[0021] like Figure 2 As shown, the operating mechanism 11 includes a frame 1101 and a rotating member 1103, an armature 1102, and a moving contact 1104 hinged on the frame 1101; the armature 1102 and the moving contact 1104 are respectively hinged at both ends of the rotating member 1103; a stationary contact 91 is provided at a position corresponding to the moving contact 1104 on the connecting plate 9; the tripping device 13 is fixedly connected to the side of the frame 1101; the armature 1103 is driven by the tripping device 13 and then drives the rotating member 1103 to rotate so that the moving contact 1104 and the connecting plate 9 are connected. The static contact 91 of plate 9 is disengaged; the busbar 10 is connected to one end of the tripping device 13 close to the armature 1102; the arc extinguishing piece 8 is fixed to the side (near) of the moving contact 1104 and the static contact 91 through the slots arranged on the upper shell 16 and the lower shell 12; the button 15 is installed on the side of the upper shell 16 and the lower shell 12 and is connected to the armature 1102. Pressing the button 15 left and right can make the armature 1102 contact or disengage with the tripping device 11, and at the same time drive the moving contact 1104 to disengage or contact with the static contact 91.

[0022] like Figure 3As shown, the tripping device 11 includes an outer frame 1301 fixed to one side of the frame 1101, an oil cup 1302 installed on the outer frame 1301, a magnetic core 1303 arranged in the oil cup 1302 and movable in the oil cup 1302; an induction coil 1304 sleeved on the outside of the oil cup 1302; a pole shoe arranged at the end of the oil cup and close to the armature; a spring 1305 arranged in the oil cup 1302 and located between the magnetic core 1303 and the pole shoe 1307, and a liquid medium 1306. When the circuit is overloaded or short-circuited, current flows through the induction coil 1304. At this time, the magnetic flux generated by the induction coil 1304 causes the magnetic core 1303 in the oil cup 1302 to move to the pole shoe 1307 at the other end of the oil cup 1302, so that the armature 1102 is immediately attracted by the pole shoe 1307, thereby driving the rotating member 1103 to rotate so that the moving contact 1104 is separated from the static contact 91 of the connecting plate 9, causing the circuit breaker to trip. After the overload or short-circuit fault is resolved, the button 15 is pressed to make the moving contact 1104 contact the static contact 91 of the connecting plate 9 again, and the circuit is reconnected.

[0023] Furthermore, the pressing block is tightly matched with the wire pressing hole 2.

[0024] Furthermore, the inner end of the pressing block (the end facing the inside of the wire pressing hole 2) is provided with a 1mm undercut (equivalent to a circle thickened around the inner end of the pressing block). In this way, after the pressing block is pressed in, the undercut fits tightly with the wire pressing hole 2, and the pressing block will not fall out, ensuring a secure connection.

[0025] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot limit the protection scope of the present invention. Any changes, equivalent substitutions, improvements and other changes and modifications made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A terminal-integrated hydraulic electromagnetic circuit breaker, comprising an upper housing and a lower housing that are joined together; an operating mechanism, a connecting plate, a tripping device, a busbar, an arc-extinguishing plate, and a button are installed in the lower housing; characterized in that: It also includes a base, a first plug-in sheet, and a second plug-in sheet; the base is buckled on the bottom of the lower shell, and two parallel areas are provided inside the base, each area is provided with a wire insertion hole, a wire pressing hole, and a spring sheet, a pressure block is provided in the wire pressing hole, and the spring sheet is arranged near the inner side of the wire pressing hole; one end of the first plug-in sheet and the second plug-in sheet are respectively installed in the two areas of the base and connected to the spring sheet in the area, and the other end extends out of the base; the part of the first plug-in sheet extending out of the base is located directly below the connecting plate and is connected to the connecting plate through bolts; The plug hole corresponding to the area where the plug piece 1 is located is connected to the live wire, and the live wire enters the area where the plug piece 1 is located through the plug hole and contacts the plug piece 1 and the spring sheet in the area, and the end of the live wire extends between the spring sheet and the wire pressing hole in the area and is pressed against the spring sheet by the pressing block in the wire pressing hole in the area; The plug hole corresponding to the area where the plug-in piece 2 is located is connected to the neutral wire, and the neutral wire enters the area where the plug-in piece 2 is located through the plug hole and contacts the plug-in piece 2 and the spring sheet in the area. The end of the neutral wire extends between the spring sheet and the wire pressing hole in the area and is pressed against the spring sheet by the pressure block in the wire pressing hole in the area.

2. The terminal-integrated hydraulic electromagnetic circuit breaker according to claim 1, characterized in that: The operating mechanism includes a frame and a rotating part, an armature and a moving contact hinged on the frame; the armature and the moving contact are hinged at both ends of the rotating part respectively; a static contact is provided on the connecting plate at a position corresponding to the moving contact; the tripping device is fixedly connected to the side of the frame; the armature is driven by the tripping device and then drives the rotating part to rotate to disengage the moving contact from the static contact of the connecting plate; the busbar is connected to one end of the tripping device close to the armature; the arc extinguishing piece is fixed to the side of the moving contact and the static contact through a slot provided on the upper and lower shells; the button is installed on the side of the upper shell and the lower shell and connected to the armature, and pressing the button left and right can make the armature contact or disengage with the tripping device, and at the same time drive the moving contact to disengage or contact with the static contact.

3. The terminal-integrated hydraulic electromagnetic circuit breaker according to claim 2, characterized in that: The tripping device includes an outer frame fixed to one side of the frame, an oil cup installed on the outer frame, a magnetic core arranged in the oil cup and movable in the oil cup; an induction coil sleeved on the outside of the oil cup; a pole shoe arranged at the end of the oil cup and close to the armature; a spring and a liquid medium arranged in the oil cup and between the magnetic core and the pole shoe.

4. A terminal-integrated hydraulic electromagnetic circuit breaker according to any one of claims 1 to 3, characterized in that: The pressing block is tightly matched with the wire pressing hole.

5. The terminal-integrated hydraulic electromagnetic circuit breaker according to claim 4, characterized in that: The inner end of the pressing block is provided with a 1 mm undercut.

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