A circuit breaker with a direct-acting double isolating switch transmission device

Abstract

The invention discloses a circuit breaker with a direct-acting double isolating switch transmission device, comprising a frame, a double isolating switch, a circuit breaker main shaft, and a vacuum circuit breaker. The double isolating switch comprises three groups of isolating conductive components, each group of isolating conductive components comprises two screw rods, two isolating conductive cylinders and a turbine; an isolating rotating shaft; three worm rods are arranged on the isolating rotating shaft and are matched with the turbines one by one, and the two screw rods are driven to rotate through the worm rod turbine structure, and finally the two isolating conductive cylinders are driven to move linearly up and down in different directions to connect or disconnect with the external circuit, so as to realize the opening and closing of the double isolating switch; the vacuum circuit breaker comprises a pole and a vacuum interrupter, the static ends of the vacuum interrupter are electrically connected to the two isolating conductive cylinders respectively, the moving end of the vacuum interrupter is driven to the circuit breaker main shaft through a transmission component, and the circuit breaker main shaft rotates through the transmission of the transmission component to drive the moving end of the vacuum interrupter to move, so as to realize the opening and closing of the vacuum interrupter. The overall structure of the invention is more compact and small, and is easy to assemble.

Description

Technical Field

[0001] The invention relates to the technical field of double isolating switch transmission devices, and in particular to a circuit breaker comprising a direct-acting double isolating switch transmission device. Background Art

[0002] The double isolating switch in the circuit breaker of the prior art is generally an isolating knife switch, one end of which is fixed on the static end of the vacuum arc extinguishing chamber, and the other end is driven by a connecting rod to rotate and insert the isolating knife switch to realize the closing and opening process of the double isolating switch. However, when operating, this technical solution drives the isolating knife switch to move through a variety of large structural components such as a main shaft, a connecting rod, a crank arm, a zero-crossing spring device, and an insulating part. The structure is complex and redundant, and the assembly is difficult. In addition, the material used in the product parts is increased, which increases the material cost. In addition, the action mode of the isolating knife switch is mostly rotary or plug-in, and its movement path and rotation swing range are also wide, occupying more space. Moreover, most of the operations need to rely on manual operation, which is extremely inconvenient. Summary of the invention

[0003] The present invention aims to provide a circuit breaker with a direct-acting double isolating switch transmission device to solve the problems that the traditional double isolating switch transmission device has a large space occupation, large internal parts, complex structure, and inconvenient assembly and operation.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a circuit breaker with a direct-acting double isolating switch transmission device, comprising a frame; a double isolating switch, comprising three groups of isolating conductive components longitudinally distributed on the frame, each group of isolating conductive components comprising two screw rods, two isolating conductive cylinders and a turbine, the two isolating conductive cylinders are respectively sleeved outside the two screw rods, the two screw rods are connected by a turbine, and the threads of the two screw rods have opposite rotation directions; an isolating rotating shaft, arranged on the frame; three worm rods, which are jointly arranged on the isolating rotating shaft and rotate with the rotation of the isolating rotating shaft, the worm rods are matched with the turbines one by one, and the worm rods are used to drive the turbines to rotate and then drive each The two screw rods of a set of isolating conductive components rotate, and finally drive the two isolating conductive cylinders on the two screw rods to move linearly up and down in different directions to connect or disconnect with the external circuit, so as to realize the opening and closing of the double isolating switch; a circuit breaker main shaft is arranged on the frame, and a vacuum circuit breaker is arranged on the frame. The vacuum circuit breaker includes a pole and a vacuum arc extinguishing chamber arranged in the pole. The static ends of the vacuum arc extinguishing chamber are electrically connected to the two isolating conductive cylinders respectively, and the moving end of the vacuum arc extinguishing chamber is driven and connected with the circuit breaker main shaft through a transmission component. The rotation of the circuit breaker main shaft drives the moving end of the vacuum arc extinguishing chamber through the transmission of the transmission component to realize the opening and closing of the vacuum arc extinguishing chamber.

[0005] Optionally, screw sleeves connected to the screw rod are respectively fixed at the ends of the two isolated conductive cylinders that are close to each other.

[0006] Optionally, both ends of the turbine are riveted and fixed to two screw rods through pins.

[0007] Optionally, a nut is provided at one end of the two isolated conductive cylinders away from each other, for forming an active electrical connection with an external circuit, and the nuts on the two isolated conductive cylinders are in contact with or separated from the external circuit at the same time.

[0008] Optionally, the circuit breaker main shaft is connected to the transmission assembly via a crank arm, and an energy storage spring is disposed on the crank arm sleeve.

[0009] Optionally, the transmission assembly includes an insulating pull rod, a transmission lever, and a pull rod, wherein one end of the insulating pull rod is pivotally connected to the main shaft of the circuit breaker, and the other end is connected to one end of the transmission lever, one end of the pull rod is connected to the other end of the transmission lever, and the other end of the pull rod forms a driving connection with the moving end of the vacuum arc extinguishing chamber.

[0010] Optionally, an operating mechanism is further provided on one side of the frame, and the operating mechanism is used to control and drive the isolating shaft or the circuit breaker main shaft to rotate around its axis respectively.

[0011] The present invention has the following beneficial effects:

[0012] The isolating conductive cylinder of the double isolating switch of the present invention is movably connected to the external circuit in an up and down linear motion manner to realize the opening and closing process of the double isolating switch. Compared with the prior art method that requires the use of a main shaft, a connecting rod, a crank arm and many other relatively large components to drive the isolating knife switch to rotate and thus realize the opening and closing of the double isolating switch, the technical solution has a simple structure, occupies less space, and has a more compact and small overall structure, so that the present invention can be installed in a smaller space, which is convenient for assembly and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front side perspective stereogram of an embodiment of the present invention.

[0014] Figure 2 It is a rear side perspective stereogram of an embodiment of the present invention.

[0015] Figure 3 It is a front view of an embodiment of the present invention.

[0016] Figure 4 It is a rear view of an embodiment of the present invention.

[0017] Figure 5 yes Figure 3 Sectional view at AA.

[0018] The accompanying drawings are marked with: 1 frame, 2 isolation shaft, 3 screw rod, 4 isolation conductive cylinder, 5 turbine, 6 turbine rod, 7 sleeve, 8 pin, 9 nut, 10 vacuum circuit breaker, 101 pole, 102 vacuum interrupter, 11 circuit breaker main shaft, 12 transmission assembly, 121 insulating pull rod, 122 transmission lever, 123 pull rod, 13 operating mechanism. DETAILED DESCRIPTION

[0019] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0020] See also Figure 1-5 As shown, as an embodiment of the present invention, a circuit breaker including a direct-acting double isolating switch transmission device is provided, comprising a frame 1; a double isolating switch, comprising three groups of isolating conductive components longitudinally distributed on the frame 1, each group of isolating conductive components comprising two screw rods 3, two isolating conductive cylinders 4 and a turbine 5, the two isolating conductive cylinders 4 are respectively sleeved outside the two screw rods 3, the two screw rods 3 are connected by a turbine 5, and the threads of the two screw rods 3 are in opposite directions; an isolating rotating shaft 2 is arranged on the frame 1; three worms 6 are jointly arranged on the isolating rotating shaft 2, and rotate with the rotation of the isolating rotating shaft 2, the worms 6 are matched with the turbines 5 one by one, and the worms 6 are used to drive the turbines 5 to rotate and then drive the two screws of each group of isolating conductive components. The rod 3 rotates, and finally drives the two isolating conductive cylinders 4 on the two lead screws 3 to move linearly up and down in opposite directions to connect or disconnect with the external circuit, so as to realize the opening and closing of the double isolating switch; a circuit breaker main shaft 11 is arranged on the frame 1, and a vacuum circuit breaker 10 is arranged on the frame 1. The vacuum circuit breaker 10 includes a pole 101 and a vacuum arc extinguishing chamber 102 arranged in the pole 101. The static ends of the vacuum arc extinguishing chamber 102 are electrically connected to the two isolating conductive cylinders 4 respectively, and the moving end of the vacuum arc extinguishing chamber 102 is driven and connected with the circuit breaker main shaft 11 through a transmission component 12. The circuit breaker main shaft 11 rotates through the transmission of the transmission component 12 to drive the moving end of the vacuum arc extinguishing chamber 102 to move, so as to realize the opening and closing of the vacuum arc extinguishing chamber 102.

[0021] The above technical solution drives the three vortex rods 6 on the isolation shaft 2 to rotate in the forward direction, and then drives the turbine 5 on each isolation conductive component connected to each vortex rod 6 to rotate, thereby driving the two screw rods 3 to rotate, so that the two isolation conductive cylinders 4 on the two screw rods 3 move linearly in opposite directions away from each other, until they are pushed to connect with the external line. At this time, the double isolation switch is in the closed state. At the same time, the rotation of the circuit breaker main shaft 11 drives the transmission drive of the transmission component 12 to drive the moving end of the vacuum arc extinguishing chamber 102 to achieve the closure of the vacuum arc extinguishing chamber 102. At this time, the closing and power transmission can be achieved. Similarly, the three vortex rods 6 on the isolation shaft 2 are driven to rotate in the reverse direction. The three vortex rods 6 drive the turbine 5 connected to them to rotate, thereby driving the two screw rods 3 to rotate, so that the two isolation conductive cylinders 4 on the two screw rods 3 move linearly in opposite directions towards each other, so that the two isolation conductive cylinders 4 are disconnected from the external line. At this time, the double isolation switch is in the open state. The isolating conductive cylinder 4 of the double isolating switch is in an up and down linear motion mode and is movably connected to the external circuit to realize the opening and closing process of the double isolating switch. Compared with the prior art method that requires the use of a main shaft, a connecting rod, a crank arm and many other relatively large parts to drive the isolating knife switch to rotate and thus realize the opening and closing of the double isolating switch, this technical solution has a simple structure, occupies less space, and has a more compact and small overall structure, so that the present invention can be installed in a smaller space, which is convenient for assembly and operation.

[0022] In this embodiment, the ends of the two isolating conductive tubes 4 that are close to each other are respectively fixed with screw sleeves 7 connected to the screw rod 3. The screw sleeves 7 and the screw rod 3 form a threaded connection to drive the linear movement of the isolating conductive tube 4, thereby avoiding wear of the direct connection between the isolating conductive tube 4 and the screw rod 3 due to long-term use, thereby reducing the failure rate and maintenance costs.

[0023] In this embodiment, both ends of the turbine 5 are riveted and fixed to the two screw rods 3 through pins 8, respectively, so that the stability and reliability are higher.

[0024] In this embodiment, a nut 9 is provided at one end of the two isolated conductive cylinders 4 that is away from each other, and is used to form an active electrical connection with an external circuit, and the nuts 9 on the two isolated conductive cylinders 4 are in contact with or separated from the external circuit at the same time, which is safer and more reliable, and has higher operating efficiency. Of course, in other embodiments, it is not necessary to contact or separate at the same time, but the operating efficiency will be reduced.

[0025] In this embodiment, the circuit breaker main shaft 11 is connected to the transmission assembly 12 via a crank arm, and the crank arm outer sleeve is provided with an energy storage spring for storing and releasing energy to achieve a driving connection between the transmission assembly 12 and the moving end of the arc chamber of the vacuum arc extinguishing chamber 102.

[0026] In this embodiment, the transmission assembly 12 includes an insulating pull rod 121, a transmission lever 122, and a pull rod 123. One end of the insulating pull rod 121 is pivotally connected to the circuit breaker main shaft 11, and the other end is connected to one end of the transmission lever 122. One end of the pull rod 123 is connected to the other end of the transmission lever 122, and the other end of the pull rod 123 forms a driving connection with the moving end of the vacuum arc chamber 102.

[0027] In this embodiment, an operating mechanism 13 is also provided on one side of the frame 1, and the operating mechanism 13 is used to control and drive the isolation shaft 2 or the circuit breaker main shaft 11 to rotate around its axis, thereby realizing the opening and closing process of the double isolation switch and the opening and closing process of the vacuum arc chamber 102.

[0028] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

1. A circuit breaker with a direct-acting double isolating switch transmission device, characterized in that: include frame; The double isolating switch comprises three groups of isolating conductive components longitudinally distributed on the frame, each group of isolating conductive components comprises two screw rods, two isolating conductive cylinders and a turbine, the two isolating conductive cylinders are respectively sleeved outside the two screw rods, the two screw rods are connected by a turbine, and the threads of the two screw rods are rotated in opposite directions; An isolation shaft is arranged on the frame; Three worms are arranged on the isolation shaft and rotate with the rotation of the isolation shaft. The worms are matched with the turbines one by one. The worms are used to drive the turbines to rotate and then drive the two screws of each group of isolation conductive components to rotate, and finally drive the two isolation conductive cylinders on the two screws to move linearly up and down in different directions to connect or disconnect with the external circuit, so as to realize the opening and closing of the double isolation switch; A circuit breaker main shaft is arranged on the frame, A vacuum circuit breaker is arranged on a frame. The vacuum circuit breaker includes a pole and a vacuum interrupter arranged in the pole. The static end of the vacuum interrupter is electrically connected to two isolation conductive cylinders respectively. The moving end of the vacuum interrupter is connected to the main shaft of the circuit breaker through a transmission assembly. The main shaft of the circuit breaker rotates to drive the moving end of the vacuum interrupter to move through the transmission of the transmission assembly, thereby realizing the opening and closing of the vacuum interrupter. The circuit breaker main shaft is connected to the transmission assembly through a crank arm, and an energy storage spring is arranged on the outer sleeve of the crank arm; the transmission assembly includes an insulating pull rod, a transmission lever, and a pull rod, one end of the insulating pull rod is pivoted to the circuit breaker main shaft, and the other end is connected to one end of the transmission lever, one end of the pull rod is connected to the other end of the transmission lever, and the other end of the pull rod forms a driving connection with the moving end of the vacuum arc extinguishing chamber; an operating mechanism is also arranged on one side of the frame, and the operating mechanism is used to control and drive the isolation shaft or the circuit breaker main shaft to rotate around its axis respectively; the ends of the two isolation conductive cylinders that are close to each other are respectively fixed with screw sleeves connected to the screw rod; the ends of the two isolation conductive cylinders that are far away from each other are provided with nuts, which are used to form an active electrical connection with an external circuit, and the nuts on the two isolation conductive cylinders are in contact with or separated from the external circuit at the same time.

2. The circuit breaker with direct-acting double isolating switch transmission device according to claim 1 is characterized in that: The two ends of the turbine are riveted and fixed to two screw rods through pins.

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