Combined circuit breaker

Abstract

The invention relates to the field of circuit breakers, and particularly discloses a combined circuit breaker which comprises a combined circuit breaker body, a circuit breaker cabling rack is arranged on one side of the combined circuit breaker body, tapping circuit breakers are arranged in the combined circuit breaker body in an array mode, and mounting clamping grooves are formed in the sides, close to the circuit breaker cabling rack, of the tapping circuit breakers. A circuit breaker positioning plug pin is arranged in the mounting clamping groove, a positioning spring is mounted at the lower end of the circuit breaker positioning plug pin and located in the tapping circuit breaker, a butt joint slot is formed in the side, away from the mounting shifting block, of the tapping circuit breaker, and a mounting support is mounted at the outer side end of the circuit breaker cabling rack. A wiring through hole is formed in the position, located in the circuit breaker wiring rack, of one side of the plug pin positioning groove, and cable limiting through pipes are installed in the limiting guide groove in an array mode. According to the circuit breaker cabling rack, the whole circuit breaker cabling rack is arranged to be a U-shaped mechanism, after a connected cable is connected into the circuit breaker, the connected cable can be hidden and stored towards the interior of the cabling rack, and the situation that the appearance is affected due to cable exposure is prevented.

Description

Technical Field

[0001] The invention relates to the field of circuit breakers, in particular to a combined circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances. Circuit breakers can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When they have serious overloads or short circuits and undervoltage faults, they can automatically cut off the circuit. Its function is equivalent to a combination of a fuse switch and an over-underheating relay, and generally no parts need to be changed after breaking the fault current. It has been widely used. Power distribution is an extremely important link in the generation, transmission and use of electricity. The distribution system includes transformers and various high and low voltage electrical equipment. Low-voltage circuit breakers are a type of electrical appliance with a large number of uses.

[0003] However, since the multiple branch circuit breakers inside the combined circuit breaker require external circuits, and there are too many circuits, cross-entanglement is likely to occur during connection, making subsequent inspection and maintenance inconvenient. Summary of the invention

[0004] In view of the existing problems, the present invention provides a combined circuit breaker, which can effectively solve the problems raised in the background technology when used in combination.

[0005] To solve the above problems, the present invention adopts the following technical solutions: A combined circuit breaker comprises a combined circuit breaker, a circuit breaker wiring rack is arranged on one side of the combined circuit breaker, a tap circuit breaker is arranged in an internal array of the combined circuit breaker, a mounting slot is arranged on a side of the tap circuit breaker close to the circuit breaker wiring rack, a circuit breaker positioning pin is arranged inside the mounting slot, a positioning spring is arranged at the lower end of the circuit breaker positioning pin inside the tap circuit breaker, a spring sleeve is connected to the lower end of the positioning spring, one end of the circuit breaker positioning pin penetrates through the side surface of the tap circuit breaker, and a spring sleeve is arranged inside the mounting slot. A mounting block is provided, a docking slot is provided on the side of the tap circuit breaker located away from the mounting block, a mounting bracket is installed on the outer end of the circuit breaker wiring rack, an internal array of the mounting bracket is provided with engaging mounting screw holes, a pin positioning groove is provided on the side surface of the circuit breaker wiring rack below the circuit breaker positioning pin, a wiring through hole is provided on one side of the pin positioning groove located inside the circuit breaker wiring rack, a limiting guide groove is provided on the inner side wall of the wiring through hole, and a cable limiting through tube is installed on the internal array of the limiting guide groove.

[0006] As a further solution of the present invention: a circuit breaker is provided with a circuit breaking mechanism inside, and the circuit breaking mechanism includes: a circuit operating lever, a wire screw mechanical arm, and an electromagnetic coil. The upper surface of the wire screw mechanical arm is connected with an energy storage spring, and an upper U-shaped hook ring is connected between the circuit operating lever and the wire screw mechanical arm.

[0007] As a further solution of the present invention: a bimetallic strip is arranged below the end of one side of the wire screw mechanical arm away from the circuit operating rod, a lower U-shaped hook ring is connected between the bimetallic strip and the wire screw mechanical arm, and a passage main contact connecting rod is arranged directly above the bimetallic strip.

[0008] As a further solution of the present invention: an electrical plug is installed inside the electromagnetic coil, and a compression spring is installed on the lower surface of the electrical plug.

[0009] As a further solution of the present invention: the mounting bracket is fixedly connected to the circuit breaker wiring rack, and the cable limiting threading tube is slidably connected to the limiting guide groove.

[0010] As a further solution of the present invention: the circuit breaker positioning pin is fixedly connected to the spring sleeve through the positioning spring, the installation block is fixedly connected to the circuit breaker positioning pin, and the installation block is clamped with the docking slot.

[0011] As a further solution of the present invention: a cable fixing buckle is installed on one side of the upper surface of the tap circuit breaker, the circuit breaker wiring rack is a U-shaped component, and wiring holes are opened on the upper and lower surfaces of the tap circuit breaker.

[0012] As a further solution of the present invention: a rotating shaft is installed between the circuit operating lever and the tap circuit breaker, the circuit operating lever is an insulating material component, and the wire screw mechanical arm is rotatably connected to the tap circuit breaker.

[0013] As a further solution of the present invention: the outer ends of the electromagnetic coil and the bimetallic strip are both connected with wiring terminals, and the outer side of the lower U-shaped hook ring is sleeved with a movable spring.

[0014] As a further solution of the present invention: the electrical plug is fixedly connected to the tap circuit breaker via the compression spring.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The wiring rack of the circuit breaker is set as a U-shaped structure as a whole. After the connected cables are connected to the inside of the circuit breaker, the connected cables can be conveniently hidden and stored inside the wiring rack, which can prevent the exposed cables from affecting the appearance. The wiring rack of the circuit breaker is raised on the inner wall of the installation box as a whole, and a certain gap can be reserved after the circuit breaker is installed as a whole, which can facilitate the heat dissipation in daily use, and also facilitate disassembly and maintenance during use.

[0016] 2. The positioning spring of the circuit breaker is compressed and stored inside the spring sleeve, and the positioning pin of the circuit breaker is inserted into the pin positioning groove on the outside of the circuit breaker wiring rack. The remaining tap circuit breakers are then installed one by one, and the side of the tap circuit breaker with the installation block installed later corresponds to the side of the docking slot of the tap circuit breaker on the previous side, which can reduce the gap after the tap circuit breaker is spliced.

[0017] 3. Wrap the entire wiring around the outside of the tap circuit breaker and buckle it inside the cable fixing buckle, and then insert the connecting cable into the cable limit tube. Use the control limit guide groove to slide on the limit guide groove on the inside of the wiring through hole to control the direction and wiring interval of the cable, and prevent the cross-entanglement of the wiring from causing danger.

[0018] 4. When a short circuit occurs, a large current will pass through the electromagnetic coil as a whole and generate a magnetic field. The electrical plug will push the wire screw mechanical arm downward as a whole, driving the swinging bimetallic strip to disconnect the connection with the main contact connecting rod of the passage. At the same time, the stretched energy storage spring connected to the upper end of the wire screw mechanical arm will shrink, and the upper U-shaped hook ring connected to the circuit operating lever will swing, controlling the circuit operating lever to swing downward, and the entire tap circuit breaker will complete the function of cutting off the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a combined circuit breaker; Figure 2It is a structural schematic diagram of a circuit breaker wiring rack in a combined circuit breaker; Figure 3 It is an internal schematic diagram of a tap circuit breaker in a combined circuit breaker; Figure 4 It is a structural schematic diagram of a tap circuit breaker in a combined circuit breaker; Figure 5 It is an enlarged schematic diagram of the position of a positioning pin of a circuit breaker in a combined circuit breaker; Figure 6 This is an enlarged schematic diagram of an electromagnetic coil in a combined circuit breaker.

[0020] In the figure: 1. combination circuit breaker; 2. circuit breaker wiring rack; 3. tap circuit breaker; 4. installation slot; 5. wiring hole; 6. cable fixing buckle; 7. installation block; 8. docking slot; 9. circuit breaker positioning pin; 201. installation bracket; 202. engaging installation screw hole; 203. pin positioning slot; 204. wiring through hole; 205. limiting guide slot; 206. cable limiting tube; 301. circuit control lever; 302. wire screw mechanical arm; 303. upper U-shaped hook ring; 304. energy storage spring; 305. lower U-shaped hook ring; 306. electromagnetic coil; 307. main contact link of passage; 308. bimetallic strip; 309. electrical plug block; 310. compression spring; 901. positioning spring; 902. spring sleeve. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific inventions, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0022] In the description of this specification, the description with reference to the terms "this embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0023] like Figure 1-6As shown, the present embodiment provides a combined circuit breaker, including a combined circuit breaker 1, a circuit breaker wiring rack 2 is arranged on one side of the combined circuit breaker 1, the circuit breaker wiring rack 2 is a U-shaped component, a tap circuit breaker 3 is arranged in an internal array of the combined circuit breaker 1, a cable fixing buckle 6 is installed on one side of the upper surface of the tap circuit breaker 3, a mounting card slot 4 is arranged on the side of the tap circuit breaker 3 close to the circuit breaker wiring rack 2, wiring holes 5 are opened on the upper and lower surfaces of the tap circuit breaker 3, a circuit breaker positioning pin 9 is arranged inside the mounting card slot 4, and the circuit breaker The lower end of the locating pin 9 of the tap circuit breaker is located inside the tap circuit breaker 3 and is installed with a locating spring 901. The lower end of the locating spring 901 is connected with a spring sleeve 902. The locating pin 9 of the circuit breaker is fixedly connected with the spring sleeve 902 through the locating spring 901. One end of the locating pin 9 of the circuit breaker passes through the side surface of the tap circuit breaker 3 and is provided with a mounting block 7. The mounting block 7 is fixedly connected with the locating pin 9 of the circuit breaker. The tap circuit breaker 3 is located on a side away from the mounting block 7 and is provided with a docking slot 8. The mounting block 7 is clamped with the docking slot 8. The wiring rack of the circuit breaker 2 is provided with a mounting bracket 201 at the outer end thereof, the mounting bracket 201 is fixedly connected to the circuit breaker wiring rack 2, an internal array of the mounting bracket 201 is provided with an engaging mounting screw hole 202, a pin positioning groove 203 is provided on the side surface of the circuit breaker wiring rack 2 below the circuit breaker positioning pin 9, a wiring through hole 204 is provided on one side of the pin positioning groove 203 and located inside the circuit breaker wiring rack 2, a limiting guide groove 205 is provided on the inner side wall of the wiring through hole 204, and a cable limiting through tube 206 is provided on the internal array of the limiting guide groove 205 The cable limiting tube 206 is slidably connected to the limiting guide groove 205. The cable limiting tube 206 as a whole can slide left and right on the limiting guide groove 205 inside the wiring through-hole 204, so as to control the direction and wiring interval of the cable, and prevent the danger caused by cross-entanglement of the wiring. When a short circuit occurs in the internal circuit, when multiple tap circuit breakers 3 are controlled to be located at different installation positions outside the circuit breaker wiring rack 2, the corresponding cable fixing buckle 6 as a whole can adapt to the routing limit of the tap circuit breakers 3 at different positions.

[0024] like Figure 2-6As shown, in this embodiment, a circuit breaker mechanism is provided inside the tap circuit breaker 3, and the circuit breaker mechanism includes: a circuit operating lever 301, a wire screw mechanical arm 302, and an electromagnetic coil 306. A rotating shaft is installed between the circuit operating lever 301 and the tap circuit breaker 3. The circuit operating lever 301 is an insulating material component. The upper surface of the wire screw mechanical arm 302 is connected to an energy storage spring 304. The energy storage spring 304 connected to the upper end of the wire screw mechanical arm 302 is in a stretched state. When a short circuit occurs, the energy storage spring 304 is contracted, and the upper return character connected to the circuit operating lever 301 is simultaneously The U-shaped hook ring 303 will swing, and the control circuit operating rod 301 will swing downward, so that the entire tap circuit breaker 3 completes the function of cutting off the circuit, and the wire screw mechanical arm 302 is rotatably connected to the tap circuit breaker 3. An upper U-shaped hook ring 303 is connected between the circuit operating rod 301 and the wire screw mechanical arm 302. The wire screw mechanical arm 302 is located at a side end away from the circuit operating rod 301 and is provided with a bimetallic strip 308 below. The bimetallic strip 308 and the tap circuit breaker 3 can rotate as a whole. When the end of the wire screw mechanical arm 302 squeezes the bimetallic strip 308 as a whole, the tap circuit breaker 3 can rotate. The swinging bimetallic strip 308 will disconnect the connection with the main contact link 307 of the passage, and the electrical passage will be cut off. The outer ends of the electromagnetic coil 306 and the bimetallic strip 308 are connected to the wiring terminals. A lower U-shaped hook ring 305 is connected between the bimetallic strip 308 and the wire screw mechanical arm 302. A movable spring is sleeved on the outer side of the lower U-shaped hook ring 305. The main contact link 307 of the passage is arranged just above the bimetallic strip 308. An electrical plug block 309 is installed inside the electromagnetic coil 306. A compression spring 310 is installed on the lower surface of the electrical plug block 309. The plug block 309 is fixedly connected to the tap circuit breaker 3 through the compression spring 310. When a short circuit occurs in the internal circuit, a large current will generate a magnetic field after passing through the electromagnetic coil 306 as a whole. The magnetic field overcomes the reaction force of the compression spring 310 through magnetic attraction, and the electrical plug block 309 pushes the wire screw mechanical arm 302 downward as a whole. When the circuit operates normally, the set compression spring 310 will push the electrical plug block 309 upward, and the bimetallic strip 308 and the main contact link 307 of the passage will contact as a whole, and the bimetallic strip 308 and the electromagnetic coil 306 are externally connected to the power terminal.

[0025] The working principle of the present invention is as follows: when in use, the circuit breaker wiring rack 2 is placed as a whole at the installation position, and the entire circuit breaker wiring rack 2 is fixed by passing the bolt as a whole through the meshing installation screw hole 202 inside the installation bracket 201, firstly, a tap circuit breaker 3 is placed as a whole on the outside of the circuit breaker wiring rack 2, and the installation block 7 on one side of the installation slot 4 of the tap circuit breaker 3 is pushed outward as a whole, so that the installation block 7 as a whole accommodates the circuit breaker positioning pin 9 as a whole into the inside of the tap circuit breaker 3, and the circuit breaker positioning pin 9 as a whole compresses and accommodates the positioning spring 901 as a whole into the inside of the spring sleeve 902, and the tap circuit breaker 3 as a whole is clamped into the installation slot 4 to the outside of the circuit breaker wiring rack 2, and then the installation slot 4 is loosened. After the force of the installation block 7 is turned on, the circuit breaker positioning pin 9 is integrally inserted into the pin positioning groove 203 on the outer side of the circuit breaker wiring rack 2, and then the remaining tap circuit breakers 3 are installed in sequence, and the side of the tap circuit breaker 3 installed later with the installation block 7 corresponds to the side of the docking slot 8 of the tap circuit breaker 3 on the front side. After the installation is completed, the tap circuit breaker 3 installed later is pushed toward the position of the tap circuit breaker 3 installed in front, and the installation block 7 is integrally inserted into the inside of the docking slot 8 to reduce the gap at the connection between the two adjacent tap circuit breakers 3. After the installation is formed, the combined circuit breaker 1 is formed as a whole, and then the wiring is closed and connected to the inside of the wiring hole 5 on the upper and lower surfaces of the tap circuit breaker 3, and the wiring is integrally connected. The body is wound around the outside of the tap circuit breaker 3 and then buckled inside the cable fixing buckle 6, and then the connecting cable is inserted into the cable limiting tube 206. The cable limiting tube 206 is controlled to slide on the limiting guide groove 205 on the inner side of the wiring through hole 204, so as to control the direction and wiring interval of the cable, and prevent the cross-entanglement of the wiring from causing danger. When the internal circuit is short-circuited, a large current will generate a magnetic field after passing through the electromagnetic coil 306 as a whole. The magnetic field overcomes the reaction force of the compression spring 310 through the magnetic attraction, and the electrical plug 309 pushes the wire screw mechanical arm 302 downward as a whole, so that the wire screw mechanical arm 302 swings downward, and the end of the wire screw mechanical arm 302 squeezes the swing of the bimetallic strip 308 as a whole, and the swinging bimetallic strip The sheet 308 will disconnect from the main contact link 307 of the passage, and the electrical passage will be cut off. At the same time, when the swinging wire screw mechanical arm 302 rotates, the stretched energy storage spring 304 connected to the upper end of the wire screw mechanical arm 302 will shrink, and at the same time, the upper U-shaped hook ring 303 connected to the circuit operating lever 301 will swing, controlling the circuit operating lever 301 to swing downward, so that the entire tap circuit breaker 3 completes the function of cutting off the circuit, and without applying external force, the circuit operating lever 301 cannot be reset upward as a whole, avoiding fire caused by short circuit. When the short circuit fault is not eliminated, under the elastic action of the electromagnetic coil 306, the circuit operating lever 301 cannot be reset at all times, so the function of the tap circuit breaker 3 to cut off the circuit passage can be always guaranteed.

[0026] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] 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.

[0028] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A combined circuit breaker, comprising a combined circuit breaker (1), characterized in that: A circuit breaker wiring rack (2) is provided on one side of the combined circuit breaker (1); a tap circuit breaker (3) is provided in an internal array of the combined circuit breaker (1); a mounting slot (4) is provided on a side of the tap circuit breaker (3) located close to the circuit breaker wiring rack (2); a circuit breaker positioning pin (9) is provided inside the mounting slot (4); a positioning spring (901) is installed at the lower end of the circuit breaker positioning pin (9) located inside the tap circuit breaker (3); a spring sleeve (902) is connected to the lower end of the positioning spring (901); one end of the circuit breaker positioning pin (9) passes through a side surface of the tap circuit breaker (3) and a mounting block (7) is provided; the tap circuit breaker ( 3) A docking slot (8) is provided on a side away from the installation block (7); a mounting bracket (201) is installed on the outer end of the circuit breaker wiring rack (2); an internal array of the mounting bracket (201) is provided with engaging mounting screw holes (202); a pin positioning slot (203) is provided on the side surface of the circuit breaker wiring rack (2) below the circuit breaker positioning pin (9); a wiring through hole (204) is provided on one side of the pin positioning slot (203) and located inside the circuit breaker wiring rack (2); a limiting guide slot (205) is provided on the inner side wall of the wiring through hole (204); and a cable limiting through tube (206) is installed in the internal array of the limiting guide slot (205).

2. A combined circuit breaker according to claim 1, characterized in that: A circuit breaker mechanism is arranged inside the tap circuit breaker (3), the circuit breaker mechanism comprising: a circuit operating lever (301), a wire screw mechanical arm (302), and an electromagnetic coil (306); an energy storage spring (304) is connected to the upper surface of the wire screw mechanical arm (302); and an upper U-shaped hook ring (303) is connected between the circuit operating lever (301) and the wire screw mechanical arm (302).

3. A combined circuit breaker according to claim 2, characterized in that: A bimetallic strip (308) is provided below a side end of the wire screw mechanical arm (302) which is located away from the circuit operating rod (301); a lower U-shaped hook ring (305) is connected between the bimetallic strip (308) and the wire screw mechanical arm (302); and a passage main contact link (307) is provided directly above the bimetallic strip (308).

4. A combined circuit breaker according to claim 3, characterized in that: An electrical plug block (309) is installed inside the electromagnetic coil (306), and a compression spring (310) is installed on the lower surface of the electrical plug block (309).

5. A combined circuit breaker according to claim 1, characterized in that: The mounting bracket (201) is fixedly connected to the circuit breaker wiring rack (2), and the cable limiting threading tube (206) is slidably connected to the limiting guide groove (205).

6. A combined circuit breaker according to claim 1, characterized in that: The circuit breaker positioning pin (9) is fixedly connected to the spring sleeve (902) via the positioning spring (901), the installation block (7) is fixedly connected to the circuit breaker positioning pin (9), and the installation block (7) is snap-fitted to the docking slot (8).

7. A combined circuit breaker according to claim 1, characterized in that: A cable fixing buckle (6) is installed on one side of the upper surface of the tap circuit breaker (3); the circuit breaker wiring rack (2) is a U-shaped component; and wiring holes (5) are provided on the upper and lower surfaces of the tap circuit breaker (3).

8. A combined circuit breaker according to claim 2, characterized in that: A rotating shaft is installed between the circuit operating lever (301) and the tap circuit breaker (3); the circuit operating lever (301) is an insulating material component; and the wire screw mechanical arm (302) is rotatably connected to the tap circuit breaker (3).

9. A combined circuit breaker according to claim 3, characterized in that: The outer ends of the electromagnetic coil (306) and the bimetallic strip (308) are both connected to wiring terminals, and the outer side of the lower U-shaped hook ring (305) is sleeved with a movable spring.

10. A combined circuit breaker according to claim 4, characterized in that: The electrical plug (309) is fixedly connected to the tap circuit breaker (3) via the compression spring (310).

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