An operating mechanism for a sulfur hexafluoride circuit breaker

Abstract

The utility model discloses a kind of operating mechanisms of sulfur hexafluoride circuit breaker, including fixed shell and operating mechanism;Fixed shell: its inside upside is provided with upside installation chamber, the downside of the inside of fixed shell is provided with downside installation chamber;Operating mechanism: it includes dovetail sliding slot, dovetail sliding block, first pivot, connecting rod, jacking rod and support cylinder, the downside wall middle part of downside installation chamber is opened in the dovetail sliding slot, the inside dovetail sliding block is slidably connected with dovetail sliding block, the rear end of dovetail sliding block is fixedly connected first pivot, the outer cam surface of first pivot is rotatably connected with connecting rod, the upper end of connecting rod is rotatably connected with jacking rod, the downside wall right side of fixed shell is fixedly connected with support cylinder, the inner cam surface of support cylinder and the outer cam surface of jacking rod are slidably connected, the operating mechanism further includes circulation component, the circulation component includes second pivot, gear, guide rail and rack plate, the operating mechanism of this sulfur hexafluoride circuit breaker, transmission effect is good, and structural stability is strong.

Description

Technical Field

[0001] This utility model relates to the technical field of sulfur hexafluoride circuit breakers, specifically to an operating mechanism for a sulfur hexafluoride circuit breaker. Background Technology

[0002] A sulfur hexafluoride (SF6) circuit breaker is a high-voltage switchgear that uses sulfur hexafluoride gas (SF6) as insulation and arc-extinguishing medium. Its core functions are to achieve circuit "connection," "disconnection," and "fault protection" in power systems—reliably closing to conduct current during normal operation, and quickly tripping to disconnect fault current during faults (such as short circuits or overloads). The operating mechanism of the SF6 circuit breaker is the core power component that realizes the circuit breaker's opening and closing actions; its performance directly determines the circuit breaker's opening and closing speed, reliability, service life, and operational safety. In the prior art, patent CN217740418U discloses an operating mechanism for a sulfur hexafluoride circuit breaker, including a left side plate and a right side plate disposed in a chassis. A first gear shaft and an energy storage shaft are rotatably disposed between the left side plate and the right side plate. Both ends of the energy storage shaft are connected to closing springs via energy storage arms. A first gear, a cam, and a retaining block are disposed on the energy storage shaft. A retaining roller is disposed on the cam. The first gear is driven to the first gear shaft. A second gear is connected to the first gear shaft. An energy storage motor is driven to the second gear. A partition is disposed between the left side plate and the right side plate. A closing half-shaft is rotatably disposed between the left side plate and the partition. An opening half-shaft is rotatably disposed between the right side plate and the partition. The closing half-shaft and the opening half-shaft are located in the same axial direction. A closing latch plate and an opening latch plate are correspondingly disposed on the latch plate fixing shaft. The above-mentioned circuit breaker operating mechanism has some problems in actual use. For example, the use of closing trip plate and locking electromagnet in the circuit breaker and the high-voltage environment require the external line to drive the electromagnet to be energized in real time for opening and closing, which is not very stable. To address this, we propose an operating mechanism for a sulfur hexafluoride circuit breaker. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an operating mechanism for a sulfur hexafluoride circuit breaker with good transmission effect and strong structural stability, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an operating mechanism for a sulfur hexafluoride circuit breaker, comprising a fixed housing and an operating mechanism; Fixed housing: It has an upper mounting chamber on the upper side of its interior and a lower mounting chamber on the lower side of its interior; Operating mechanism: It includes a dovetail slide, a dovetail slider, a first rotating shaft, a connecting rod, a push rod, and a support cylinder. The dovetail slide is located in the middle of the lower side wall of the lower mounting chamber. The dovetail slider is slidably connected inside the dovetail slide. The rear end of the dovetail slider is fixedly connected to the first rotating shaft. The outer arc surface of the first rotating shaft is rotatably connected to the connecting rod. The upper end of the connecting rod is rotatably connected to the push rod. The support cylinder is fixedly connected to the right side of the upper side wall of the fixed shell. The inner arc surface of the support cylinder is slidably connected to the outer arc surface of the push rod. It has good transmission effect and strong structural stability.

[0005] Furthermore, the operating mechanism also includes a circulation component, which includes a second rotating shaft, a gear, a guide rail, and a rack plate. The second rotating shaft is rotatably connected to the middle of the lower side wall of the upper mounting chamber, and the lower end of the second rotating shaft extends into the interior of the lower mounting chamber. A gear is fixedly connected to the lower end of the second rotating shaft. A guide rail is fixedly connected to the front end of the dovetail slider. A rack plate is fixedly connected to the front and rear side walls of the guide rail, respectively. The two rack plates are installed in conjunction with a gear to realize the function of reciprocating movement of the slider.

[0006] Furthermore, the circulation assembly also includes a worm gear and a worm. The worm gear is fixedly sleeved on the middle of the outer arc surface of the second rotating shaft, and the worm is rotatably connected between the left and right interiors of the upper mounting chamber. The worm gear and the worm mesh with each other to realize the transmission function.

[0007] Furthermore, an energy storage motor is provided on the right side of the upper mounting chamber. The input shaft of the energy storage motor is fixedly connected to the right end of the worm gear, and the input end of the energy storage motor is electrically connected to an external power source to provide power for circuit breaking.

[0008] Furthermore, the length of the lower mounting chamber is greater than the length of the upper mounting chamber, providing a clearance effect for the rear connecting rod structure transmission.

[0009] Furthermore, a circuit breaker is fixedly connected to the upper end of the fixed shell, and the upper end of the top rod is fixedly connected to the lower end of the moving contact rod of the circuit breaker. The input and output ends of the circuit breaker are respectively connected to external high-voltage lines to realize the function of an external circuit breaker.

[0010] Furthermore, the width of the clamping plate between the lower mounting chamber and the upper mounting chamber is half the width of the fixed shell, which enables the guide rail to move and avoid obstacles.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The operating mechanism of this sulfur hexafluoride circuit breaker has the following advantages: The device employs a worm gear drive structure, a reciprocating circulation structure, and a simple linkage structure to drive the push rod to move up and down, thereby performing opening and closing actions on the circuit breaker. The worm gear drive has a self-locking effect and a stable transmission effect, the reciprocating circulation structure can convert the unidirectional rotation of the energy storage motor into reciprocating movement, and the linkage structure realizes the extension and retraction of the push rod. It has good transmission effect and strong structural stability. Attached Figure Description Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the fixed shell of this utility model; Figure 3 This is a schematic cross-sectional view of the fixed shell structure of this utility model; Figure 4 This is a schematic diagram of the structure of the present invention in an explosion. Figure 5 This is a partial structural diagram of the circulation component of this utility model.

[0012] In the diagram: 1. Fixed housing, 2. Upper mounting chamber, 3. Lower mounting chamber, 4. Operating mechanism, 41. Dovetail slide, 42. Dovetail slider, 43. First rotating shaft, 44. Connecting rod, 45. Top rod, 46. Support cylinder, 47. Circulation assembly, 471. Second rotating shaft, 472. Worm gear, 473. Gear, 474. Worm, 475. Guide rail, 476. Rack plate, 5. Circuit breaker, 6. Energy storage motor, 7. Clamping plate. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-5 This embodiment provides a technical solution: an operating mechanism for a sulfur hexafluoride circuit breaker, comprising a fixed housing 1 and an operating mechanism 4; Fixed shell 1: An upper mounting chamber 2 is provided on the upper side of its interior, and a lower mounting chamber 3 is provided on the lower side of the interior of the fixed shell 1. The length of the lower mounting chamber 3 is greater than the length of the upper mounting chamber 2. The width of the clamping plate 7 between the lower mounting chamber 3 and the upper mounting chamber 2 is half the width of the fixed shell 1. The connecting rod transmission component is located in the reserved space. Operating mechanism 4 includes a dovetail slide 41, a dovetail slider 42, a first rotating shaft 43, a connecting rod 44, a push rod 45, and a support cylinder 46. The dovetail slide 41 is located in the middle of the lower side wall of the lower mounting chamber 3. The dovetail slider 42 is slidably connected inside the dovetail slide 41. The rear end of the dovetail slider 42 is fixedly connected to the first rotating shaft 43. The outer arc surface of the first rotating shaft 43 is rotatably connected to the connecting rod 44. The upper end of the connecting rod 44 is rotatably connected to the push rod 45. The support cylinder 46 is fixedly connected to the right side of the upper side wall of the fixed shell 1. The inner arc surface of the support cylinder 46... The dovetail slider 42 is slidably connected to the outer arc surface of the top rod 45. It moves left and right in the dovetail groove 41 and pushes the top rod 45 through the connecting rod 44, thereby pushing the moving contact of the circuit breaker 5 to move up and down. When the dovetail slider 42 moves to the lower side of the right support cylinder 46, it will push the moving contact of the circuit breaker 5 to move upward, realizing the function of passing. When the dovetail slider 42 moves to the lower side of the leftmost side, it will pull the top rod 45 down through the connecting rod 44, which will pull the moving contact of the circuit breaker 5 to move downward, realizing the function of breaking the circuit. The operating mechanism 4 also includes a circulation component 47, which includes a second rotating shaft 471, a gear 473, a guide rail 475, and a rack plate 476. The second rotating shaft 471 is rotatably connected to the middle of the lower side wall of the upper mounting chamber 2, and the lower end of the second rotating shaft 471 extends into the interior of the lower mounting chamber 3. The lower end of the second rotating shaft 471 is fixedly connected to the gear 473. The front end of the dovetail slider 42 is fixedly connected to the guide rail 475. The front and rear side walls of the guide rail 475 are respectively fixedly connected to the rack plate 476. The two rack plates 476 are installed in conjunction with one gear 473. (The gear 473 consists of a complete wheel structure and half of the tooth structure, or it can be considered as a half-gear structure, which can ensure that when it meshes with the rack plate 476 on one side, it can also mesh with the other...) One side of the rack plate 476 disengages. Since the tooth profile of the rack plate 476 is a straight line, all points on the tooth profile of the rack plate 476 have the same pressure angle, which is equal to the inclination angle of the tooth profile of the gear 473. This angle is called the tooth profile angle, and the standard value is 20°. The gear 473 and the rack plate 476 meet the following conditions: First, any straight line parallel to the tooth tip line has the same tooth pitch and module; second, the straight line parallel to the tooth tip line and with a tooth thickness equal to the tooth space width is called the pitch line (center line), which is the reference line for calculating the rack size. The gear 473 and the rack plate 476 meet the gear and rack meshing conditions in the prior art. The circulation assembly 47 also includes a worm gear 472 and a worm 474. The worm gear 472 is fixedly sleeved on the middle of the outer arc surface of the second rotating shaft 471. A worm gear 474 is rotatably connected between the left and right interiors of the upper mounting chamber 2. A worm wheel 472 meshes with the worm gear 474. (The transmission components, such as the worm wheel 472 and worm gear 474, are all located inside the fixed housing 1 to prevent external dust from affecting the transmission effect.) The space extending from the lower mounting chamber 3 is used to accommodate the left and right rounded corner surfaces of the guide rail 475. An energy storage motor 6 is located on the right side of the upper mounting chamber 2. The input shaft of the energy storage motor 6 is fixedly connected to the right end of the worm gear 474. The input end of the energy storage motor 6 is electrically connected to an external power source. (The energy storage motor 6 is essentially a special motor that "directively completes energy conversion and storage." Its core objective is to "reserve sufficient mechanical energy for subsequent actions." When a rotational action is required, an external control signal triggers...) When the power is depleted, the rotating shaft of the energy storage motor 6 can rotate a specified number of times until the power is exhausted. Then, the external power supply can be controlled to recharge the energy storage motor. The energy storage motor 6 uses a common energy storage motor found in existing circuit breakers. The external controller controls the operation of the energy storage motor 6 using methods commonly found in existing technology. When the energy storage motor 6 experiences an abnormal overload, it automatically cuts off the power supply to prevent damage. When the operating mechanism of the sulfur hexafluoride circuit breaker needs to be used for closing and opening operations, the energy storage motor 6 operates, and its output shaft rotates a specified number of times, driving the worm gear 474 to rotate. The rotation of the worm gear 474 then drives the gear 473 to rotate around the central axis of the second rotating shaft 471.At this time, gear 473 is engaged with the rack plate 476 on the rear side of guide rail 475. As the teeth of gear 473 mesh with the rack plate 476, and as gear 473 rotates, it forces the rack plate 476 to move to the left, thereby driving guide rail 475 to move to the left until the left side of guide rail 475 touches the left side wall of lower mounting chamber 3. At this time, gear 473 disengages from the rack plate 476 and then engages with the rack plate 476 on the front side. Simultaneously, energy storage motor 6 completes rotation and re-stores energy. When energy storage motor 6 operates again, it will drive gear 473 to continue rotating, thereby driving the rack plate 476 on the front side to drive guide rail 475 to reset to the right. At this time, the right side of guide rail 475 contacts the right side wall of lower mounting chamber 3. As guide rail 475 moves left and right, it will drive dovetail slider 42 to move left and right within dovetail groove 41. The upper end of the fixed housing 1 is fixedly connected to the circuit breaker 5, the upper end of the top rod 45 is fixedly connected to the lower end of the moving contact rod of the circuit breaker 5, and the input end and output end of the circuit breaker 5 are respectively connected to external high-voltage lines.

[0015] The working principle of the operating mechanism of the sulfur hexafluoride circuit breaker provided by this utility model is as follows: When the operating mechanism of the sulfur hexafluoride circuit breaker needs to be used and the closing and opening movements are required, the energy storage motor 6 operates, and the output shaft of the energy storage motor 6 rotates a specified number of times, driving the worm gear 474 to rotate. The rotation of the worm gear 474 will drive the gear 473 to rotate around the central axis of the second rotating shaft 471. At this time, the gear 473 maintains a meshing relationship with the rack plate 476 on the rear side of the guide rail 475. As the teeth of the gear 473 mesh with the rack plate 476 on the rear side, and as the gear 473 rotates, it forces the rack plate 476 on the rear side to move to the left, thereby driving the guide rail 475 to move to the left, until the left side of the guide rail 475 touches the left side wall of the lower mounting chamber 3. At this time, the gear 473 disengages from the rack plate 476 on the rear side and then engages with the rack plate on the front side. Plate 476 engages with the energy storage motor 6, which then rotates and stores energy again. When the energy storage motor 6 rotates again, it drives gear 473 to continue rotating, which in turn drives the guide rail 475 to reset to the right via the front drive rack plate 476. At this time, the right side of the guide rail 475 contacts the right side wall of the lower mounting chamber 3. As the guide rail 475 moves left and right, it drives the dovetail slider 42 to move left and right in the dovetail groove 41. During this time, the connecting rod 44 pushes the push rod 45, which in turn pushes the moving contact of the circuit breaker 5 to move up and down. When the dovetail slider 42 moves to the lower side of the right support cylinder 46, it pushes the moving contact of the circuit breaker 5 to move upward, realizing the function of opening the circuit. When the dovetail slider 42 moves to the lower left side, the connecting rod 44 pulls the push rod 45 downward, which pulls the moving contact of the circuit breaker 5 downward, realizing the function of closing the circuit.

[0016] It is worth noting that the circuit breaker 5 and energy storage motor 6 disclosed in the above embodiments can be freely configured according to the actual application scenario. The circuit breaker 5 can be selected according to the actual application scenario. It is recommended to use the 59ZY-CJ-F model circuit breaker energy storage motor for the energy storage motor 6. The control of the circuit breaker 5 and energy storage motor 6 by the microcontroller or PLC controller adopts the methods commonly used in the prior art.

[0017] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An operating mechanism for a sulfur hexafluoride circuit breaker, characterized in that: It includes a fixed shell (1) and an operating mechanism (4); Fixed shell (1): an upper mounting chamber (2) is provided on the upper side of its interior, and a lower mounting chamber (3) is provided on the lower side of the interior of the fixed shell (1); Operating mechanism (4): It includes a dovetail slide (41), a dovetail slider (42), a first rotating shaft (43), a connecting rod (44), a top rod (45), and a support cylinder (46). The dovetail slide (41) is located in the middle of the lower side wall of the lower installation chamber (3). The dovetail slider (42) is slidably connected inside the dovetail slide (41). The rear end of the dovetail slider (42) is fixedly connected to the first rotating shaft (43). The outer arc surface of the first rotating shaft (43) is rotatably connected to the connecting rod (44). The upper end of the connecting rod (44) is rotatably connected to the top rod (45). The right side of the upper side wall of the fixed shell (1) is fixedly connected to the support cylinder (46). The inner arc surface of the support cylinder (46) is slidably connected to the outer arc surface of the top rod (45).

2. The operating mechanism of a sulfur hexafluoride circuit breaker according to claim 1, characterized in that: The operating mechanism (4) further includes a circulation component (47), which includes a second rotating shaft (471), a gear (473), a guide rail (475), and a rack plate (476). The second rotating shaft (471) is rotatably connected to the middle of the lower side wall of the upper mounting chamber (2). The lower end of the second rotating shaft (471) extends into the interior of the lower mounting chamber (3). The lower end of the second rotating shaft (471) is fixedly connected to the gear (473). The front end of the dovetail slider (42) is fixedly connected to the guide rail (475). The front and rear side walls of the guide rail (475) are respectively fixedly connected to the rack plate (476). The two rack plates (476) are installed in cooperation with one gear (473).

3. The operating mechanism of a sulfur hexafluoride circuit breaker according to claim 2, characterized in that: The circulation assembly (47) also includes a worm wheel (472) and a worm (474). The worm wheel (472) is fixedly sleeved on the middle of the outer arc surface of the second rotating shaft (471). The worm (474) is rotatably connected between the left and right interiors of the upper mounting chamber (2). The worm wheel (472) and the worm (474) are meshed together.

4. The operating mechanism of a sulfur hexafluoride circuit breaker according to claim 3, characterized in that: The upper mounting chamber (2) is provided with an energy storage motor (6) on the right side. The input shaft of the energy storage motor (6) is fixedly connected to the right end of the worm (474), and the input end of the energy storage motor (6) is electrically connected to an external power source.

5. The operating mechanism of a sulfur hexafluoride circuit breaker according to claim 1, characterized in that: The length of the lower mounting chamber (3) is greater than the length of the upper mounting chamber (2).

6. The operating mechanism of a sulfur hexafluoride circuit breaker according to claim 1, characterized in that: The upper end of the fixed shell (1) is fixedly connected to the circuit breaker (5), the upper end of the top rod (45) is fixedly connected to the lower end of the moving contact rod of the circuit breaker (5), and the input end and output end of the circuit breaker (5) are respectively connected to the external high voltage line.

7. The operating mechanism of a sulfur hexafluoride circuit breaker according to claim 1, characterized in that: The width of the clamping plate (7) between the lower mounting chamber (3) and the upper mounting chamber (2) is half the width of the fixed shell (1).

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