Mechanical spring operating device of direct-current circuit breaker

Abstract

The invention discloses a mechanical spring operating device of a direct current circuit breaker, which relates to the technical field of circuit breaker operating mechanisms and comprises a first control mechanism, a first hooking arm, a second control mechanism, a second hooking arm and a controller. The first end of the first hooking arm and the first end of the second hooking arm are rotationally connected to the mounting base, pressure sensors are mounted at the second end of the first hooking arm and the second end of the second hooking arm, and hooks are mounted on the pressure sensors; the first control mechanism is connected with the first hooking arm and can drive the first hooking arm to rotate, the second control mechanism is connected with the second hooking arm and can drive the second hooking arm to rotate, and a hook on the first hooking arm can make contact with a hook on the second hooking arm; the first control mechanism, the second control mechanism and the pressure sensor are all electrically connected with the controller. According to the invention, rapid and accurate opening and closing work can be realized, the structure is simple, the operation is convenient, and long-time stable use is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breaker operating mechanisms, and particularly to a mechanical spring operating device for a DC circuit breaker. Background Art

[0002] In a power system, a circuit breaker is one of the most important components. The closing and opening of the circuit breaker are both driven by an operating mechanism. The mechanical operating mechanism with spring energy storage is one of the most widely used circuit breaker operating mechanisms in the power system. Generally speaking, the energy storage components in such operating mechanisms are the closing spring and the opening spring. There are also moving components in the operating mechanism to convert the energy of the closing spring into the power for closing and store energy for the opening spring. The moving components also have the function of converting the energy of the opening spring into the power for opening.

[0003] Existing circuit breaker operating mechanisms are mostly as shown in the "Mechanical Operating Mechanism for a Circuit Breaker" disclosed in the existing patent publication number CN104021954A. This existing technology includes a transmission part module M1 and a spring part module M2. Among them, a closing spring limit groove and an opening spring sliding clamping plate are provided in the spring part module M2. The closing spring limit groove and the opening spring sliding clamping plate are cylindrical helical springs, and they are arranged in a coaxial manner. The closing spring limit groove with a larger diameter is sleeved outside the opening spring sliding clamping plate with a smaller diameter.

[0004] However, the structure and transmission relationship of the existing circuit breaker operating mechanism are relatively complex, resulting in the inability to complete the energy storage, closing, and opening operations of the connecting hooks automatically, quickly, and accurately. In addition, the existing mechanical spring operating mechanism for DC circuit breakers is inconvenient to operate.

[0005] Therefore, there is an urgent need in the art for a new mechanical spring operating device for DC circuit breakers to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a mechanical spring operating device for a DC circuit breaker to solve the problems existing in the above-mentioned prior art, which can realize quick and accurate opening and closing operations and is convenient to use.

[0007] To achieve the above purpose, the present invention provides the following solution:

[0008] The present invention discloses a mechanical spring operating device for a DC circuit breaker, including a first control mechanism, a first hook arm, a second control mechanism, a second hook arm, and a controller. The structures of the first control mechanism and the second control mechanism are the same, and the structures of the first hook arm and the second hook arm are the same;

[0009] The first ends of the first hooking arm and the second hooking arm are both rotatably connected to the mounting base. Pressure sensors are installed at the second ends of the first hooking arm and the second hooking arm, and hooks are installed on the pressure sensors.

[0010] The first control mechanism is connected to the first hooking arm and can drive the first hooking arm to rotate. The second control mechanism is connected to the second hooking arm and can drive the second hooking arm to rotate. The hooks on the first hooking arm and the second hooking arm can come into contact with each other.

[0011] The first control mechanism, the second control mechanism, and the pressure sensors are all electrically connected to the controller.

[0012] Preferably, both the first hooking arm and the second hooking arm are arc-shaped structures.

[0013] Preferably, the first control mechanism includes an energy storage adjustment main body and a control support main body, and the energy storage adjustment main body is arranged on the control support main body.

[0014] The energy storage adjustment main body includes an extrusion sliding push block, a spring, a control rope, a limit vertical plate, and a fixing ring. There are two limit vertical plates, and the two limit vertical plates are respectively fixed on both sides of the fixing ring. Each limit vertical plate is provided with a limit groove. One end of the spring is fixedly connected to the fixing ring, the other end of the spring is connected to the extrusion sliding push block, one sliding clamping plate is fixedly arranged on each side of the extrusion sliding push block, and the two sliding clamping plates are respectively slidably connected in the two limit grooves. One end of the control rope is connected to the sliding clamping plate.

[0015] A driving motor is installed on the control support main body, a winding wheel is connected to the output shaft of the driving motor, and the end of the control rope away from the sliding clamping plate is connected to the winding wheel.

[0016] Preferably, a distance measuring sensor is installed on the limit vertical plate.

[0017] Preferably, the distance measuring sensor is a laser distance measuring sensor.

[0018] Preferably, the control support main body includes a fixed base, a fixed disk, a connecting column, a mounting disk, and a fixing bolt. There are two mounting disks, and the two mounting disks are respectively fixedly installed on both sides of the fixed base through the fixing bolt. The fixed disk is fixedly installed on the outside of the mounting disk through the connecting column. The driving motor is fixedly installed on the fixed disk, the output shaft of the driving motor passes through the fixed disk, and the winding wheel is rotatably connected between the mounting disk and the fixed disk.

[0019] Preferably, the fixed base is connected with a telescopic device.

[0020] Preferably, the telescopic device is an electric push rod.

[0021] Preferably, one end of the telescopic device away from the fixed base is connected with a fixed mounting seat.

[0022] Preferably, the extrusion sliding push block in the first control mechanism is hinged to the middle of the first hook arm;

[0023] The extrusion sliding push block in the second control mechanism is hinged to the middle of the second hook arm.

[0024] The present invention has achieved the following technical effects compared with the prior art:

[0025] The present invention only needs to use the first control mechanism and the second control mechanism to drive the first hook arm and the second hook arm to rotate respectively. When the hooks on the first hook arm and the second hook arm approach and contact each other, closing can be achieved. When the hooks on the first hook arm and the second hook arm are separated, it is opening. The whole process is completely controlled by the first control mechanism and the second control mechanism, and the operation is simple. And because of the simple structure, the manufacturing cost is low, and there is no relatively complex transmission connection relationship in the middle, so that the opening and closing processes can be more rapid and accurate in response. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a first perspective structural schematic diagram of a mechanical spring operating device of a DC circuit breaker according to an embodiment of the present invention;

[0028] Figure 2 It is a second perspective structural schematic diagram of a mechanical spring operating device of a DC circuit breaker according to an embodiment of the present invention;

[0029] Figure 3 It is a structural schematic diagram of a first control mechanism in a mechanical spring operating device of a DC circuit breaker according to an embodiment of the present invention;

[0030] Figure 4 It is a structural schematic diagram of an energy storage adjustment main body in a mechanical spring operating device of a DC circuit breaker according to an embodiment of the present invention;

[0031] Figure 5This is a schematic structural diagram of the control support main body in the mechanical spring operating device of the DC circuit breaker according to the embodiment of the present invention;

[0032] In the figure: 1 - First control mechanism; 2 - First hook arm; 3 - Hook; 4 - Pressure sensor; 5 - Second control mechanism; 6 - Mounting base; 7 - Second hook arm; 8 - Energy storage adjustment main body; 9 - Control support main body; 10 - Extrusion sliding push block; 11 - Sliding clamping plate; 12 - Limit groove; 13 - Spring; 14 - Distance measuring sensor; 15 - Control rope; 16 - Limit vertical plate; 17 - Fixed ring; 18 - Fixed base; 19 - Telescopic device; 20 - Fixed mounting seat; 21 - Driving motor; 22 - Fixed disk; 23 - Connecting column; 24 - Mounting disk; 25 - Reel; 26 - Fixed bolt. Specific embodiments

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] The purpose of the present invention is to provide a mechanical spring operating device for a DC circuit breaker to solve the problems existing in the above-mentioned prior art, which can realize quick and accurate opening and closing operations and is convenient to use.

[0035] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] As Figures 1-5 shown, this embodiment provides a mechanical spring operating device for a DC circuit breaker, including a first control mechanism 1, a first hook arm 2, a second control mechanism 5, a second hook arm 7, and a controller. Among them, the structures of the first control mechanism 1 and the second control mechanism 5 are the same, and the structures of the first hook arm 2 and the second hook arm 7 are the same. The connection relationships of each component are as follows:

[0037] The first ends of the first hook arm 2 and the second hook arm 7 are both rotatably connected to the mounting base 6. The mounting base 6 is installed in the housing of the circuit breaker by screws. The first ends of the first hook arm 2 and the second hook arm 7 are both connected to the connecting wire. In order to realize the rotational connection between the first hook arm 2 and the second hook arm 7, rotating rings are provided at the ends of the first hook arm 2 and the second hook arm 7 close to the corresponding mounting base 6, and corresponding fixed cylinders are provided on the mounting base 6. The rotating rings are sleeved on the fixed cylinders and are rotatably connected thereto. Pressure sensors 4 are installed at the second ends of the first hook arm 2 and the second hook arm 7. Hooks 3 are installed on the pressure sensors 4. Each hook 3 is provided with hook teeth and hook grooves that are arranged in a straight line and staggered. After the two hooks 3 are fitted together, the hook teeth of one hook 3 will hook the groove of the other hook 3, thereby further enhancing the connection tightness between the two hooks 3.

[0038] The first control mechanism 1 is connected to the first hook arm 2 and can drive the first hook arm 2 to rotate. Similarly, the second control mechanism 5 is connected to the second hook arm 7 and can drive the second hook arm 7 to rotate. After the first hook arm 2 and the second hook arm 7 rotate to a certain angle, the hooks 3 on the first hook arm 2 and the hooks 3 on the second hook arm 7 can come into contact or separate from each other.

[0039] The first control mechanism 1, the second control mechanism 5 and the pressure sensor 4 are all electrically connected to the controller. The controller can be a control panel, a PLC controller or a single-chip microcomputer controller, etc. Its function is to receive the pressure signal from the pressure sensor 4 and can control the operation of the first control mechanism 1 and the second control mechanism 5.

[0040] During actual use, the staff can control the operation of the first control mechanism 1 and the second control mechanism 5 through the controller to drive the rotation of the first hook arm 2 and the second hook arm 7. When closing the switch, only need to control the adjacent ends of the first hook arm 2 and the second hook arm 7 to rotate towards each other, so that the hooks 3 on the first hook arm 2 and the second hook arm 7 gradually approach and fit together. At this time, the pressure sensor 4 senses the pressure received by the hook 3. When the pressure reaches a certain value, it indicates that the first hook arm 2 and the second hook arm 7 are in close contact, and at this time it is in the closing state. When opening the switch, only need to control the controller to drive the adjacent ends of the first hook arm 2 and the second hook arm 7 to rotate away from each other through the first control mechanism 1 and the second control mechanism 5, so that the two hooks 3 are separated from each other. Once the two hooks 3 are not in contact, it is in the opening state.

[0041] In this embodiment, both the first hooking arm 2 and the second hooking arm 7 are arc-shaped structures. The arc-shaped structures are provided to enable the corresponding hook teeth on the two hooks 3 to come into contact with the grooves more conveniently. Of course, those skilled in the art can also adjust the specific shapes and sizes of the first hooking arm 2 and the second hooking arm 7 according to actual needs, not limited to just this one type.

[0042] In this embodiment, as Figure 3 shown, the first control mechanism 1 includes an energy storage adjustment main body 8 and a control support main body 9. The energy storage adjustment main body 8 is arranged on the control support main body 9, and one end of the energy storage adjustment main body 8 away from the control support main body 9 is used for hinging with the first hooking arm 2, and one end of the control support main body 9 away from the energy storage adjustment main body 8 is used for hinging with the inside of the housing of the circuit breaker. Since the structure of the second control mechanism 5 is exactly the same as that of the first control mechanism 1, only the first control mechanism 1 will be taken as an example for illustration here. The specific structures of the energy storage adjustment main body 8 and the control support main body 9 are as follows:

[0043] As Figure 4 shown, the energy storage adjustment main body 8 includes an extrusion sliding push block 10, a spring 13, a control rope 15, a limiting vertical plate 16 and a fixing ring 17. There are two limiting vertical plates 16, and the two limiting vertical plates 16 are respectively fixed on both sides of one surface of the fixing ring 17, while the other side of the fixing ring 17 is fixed on the control support main body 9. A long strip-shaped limiting groove 12 is opened at the center of each limiting vertical plate 16. The spring 13 is arranged between the two limiting vertical plates 16. One end of the spring 13 is fixedly connected to the fixing ring 17, and the other end of the spring 13 is connected to the extrusion sliding push block 10. The extrusion sliding push block 10 is used for hinging with the first hooking arm 2. A sliding clamping plate 11 is respectively fixed on both sides of the extrusion sliding push block 10. The width of the sliding clamping plate 11 is the same as the width of the limiting groove 12, so that the two sliding clamping plates 11 can be respectively slidably connected in the two limiting grooves 12. One end of the control rope 15 is connected to the sliding clamping plate 11.

[0044] As Figure 5 shown, a driving motor 21 is installed on the control support main body 9. The driving motor 21 can be a non-self-locking motor and is electrically connected to the controller. A winding wheel 25 is connected to the output shaft of the driving motor 21. One end of the control rope 15 away from the sliding clamping plate 11 is connected to the winding wheel 25. Specifically, one end of the control rope 15 is wound around the winding wheel 25.

[0045] In actual use, the driving motor 21 is started to drive the winding wheel 25 to rotate. The control rope 15 can be wound by the winding wheel 25. During the process of winding the control rope 15, the sliding clamping plate 11 can be driven to slide downward along the limiting groove 12, so that the sliding clamping plate 11 and the extrusion sliding push block 10 compress the spring 13 and store energy sufficiently. At the same time, the corresponding first hook arm 2 and the second hook arm 7 are driven to rotate so that the hooks 3 are in contact with each other. The extrusion force between the hooks 3 can be detected by the pressure sensor 4 to judge whether the hooks 3 are in close contact, and the technical effect of closing the switch is achieved while storing energy sufficiently. When it is necessary to open the switch, the driving motor 21 can drive the winding wheel 25 to rotate rapidly in reverse at this time, so that the control rope 15 wound on the winding wheel 25 is rapidly released, and the sliding clamping plate 11 slides rapidly upward along the limiting groove 12, and the energy-storing spring 13 stretches and opens, so that the corresponding first hook arm 2 and the second hook arm 7 rotate, and the hooks 3 are separated from each other to achieve the technical effect of opening the switch.

[0046] In this embodiment, a distance measuring sensor 14 is installed on the limiting vertical plate 16. One end of the distance measuring sensor 14 installed in the limiting groove 12 is electrically connected to the controller. Its function is to measure the distance between it and the sliding clamping plate 11, and transmit the corresponding distance signal to the controller, and then the controller controls the operation of the first control mechanism 1 and the second control mechanism 5.

[0047] In this embodiment, the distance measuring sensor 14 adopts a laser distance measuring sensor. Of course, those skilled in the art can also replace it with other sensors capable of measuring distance, such as photoelectric sensors, etc. Of course, if necessary, a corresponding reflector can be provided on the sliding clamping plate 11 to meet the use conditions of the sensor.

[0048] In this embodiment, as Figure 5 shown, the control support main body 9 includes a fixed base 18, a fixed disk 22, a connecting column 23, a mounting disk 24 and a fixing bolt 26. There are two mounting disks 24, and the two mounting disks 24 are respectively fixedly installed on both sides of the fixed base 18 through the fixing bolts 26. The fixed disk 22 is fixedly installed on the outside of the mounting disk 24 through the connecting column 23, that is, the fixing plate and the mounting disk 24 are respectively fixed at both ends of a plurality of connecting columns 23. The driving motor 21 is fixedly installed on the fixed disk 22, and the output shaft of the driving motor 21 passes through the fixed disk 22, so that the winding wheel 25 can be rotatably connected between the mounting disk 24 and the fixed disk 22.

[0049] In this embodiment, the fixed base 18 is connected with a telescopic device 19. During continuous use, when the elastic energy storage performance of the spring 13 is poor, the telescopic device 19 can drive the fixed base 18 to lift, so that the fixed base 18 squeezes the bottom of the fixed ring 17 and the spring 13, adjusts and controls the energy storage performance of the spring 13. The position of the sliding clamping plate 11 and the extrusion sliding push block 10 can be detected by the distance measuring sensor 14, so that the energy storage of the spring 13 is accurate.

[0050] In this embodiment, the telescopic device 19 adopts a common electric push rod. Of course, those skilled in the art can also replace it with a device with a telescopic function such as a cylinder or a hydraulic cylinder.

[0051] In this embodiment, one end of the telescopic device 19 away from the fixed base 18 is connected with a fixed mounting seat 20. Specifically, the telescopic device 19 and the fixed mounting seat 20 are hinged, that is, corresponding hinge holes are provided on the telescopic device 19 and the fixed mounting seat 20, and then a hinge pin is used to pass through the corresponding hinge holes in turn to achieve the hinge. The purpose of this setting is that during the rotation of the first hook arm 2, the first control mechanism 1 will stretch and rotate accordingly.

[0052] In this embodiment, the extrusion sliding push block 10 in the first control mechanism 1 is hinged to the middle of the first hook arm 2. Specifically, a hinge ring can be provided on each of the extrusion sliding push block 10 and the first hook arm 2, and then a hinge pin is used to pass through the two hinge rings to achieve the hinge between the extrusion sliding push block 10 and the first hook arm 2.

[0053] Similarly, the extrusion sliding push block 10 in the second control mechanism 5 is hinged to the middle of the second hook arm 7, and its hinging method is also connected by a hinge ring and a hinge pin, so it will not be repeated here.

[0054] In the present invention, specific examples are used to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A mechanical spring operating device for a DC circuit breaker, characterized in that: The invention comprises a first control mechanism (1), a first hook arm (2), a second control mechanism (5), a second hook arm (7) and a controller, wherein the first control mechanism (1) and the second control mechanism (5) have the same structure, and the first hook arm (2) and the second hook arm (7) have the same structure; The first end of the first hook arm (2) and the first end of the second hook arm (7) are both rotatably connected to the mounting base (6); the second end of the first hook arm (2) and the second end of the second hook arm (7) are both installed with a pressure sensor (4); and the pressure sensor (4) is installed with a hook (3); The first control mechanism (1) is connected to the first hook arm (2) and is capable of driving the first hook arm (2) to rotate, the second control mechanism (5) is connected to the second hook arm (7) and is capable of driving the second hook arm (7) to rotate, and the hook (3) on the first hook arm (2) and the hook (3) on the second hook arm (7) are capable of contacting each other; The first control mechanism (1), the second control mechanism (5) and the pressure sensor (4) are all electrically connected to the controller.

2. The DC circuit breaker mechanical spring operating device according to claim 1, characterized in that: The first hook arm (2) and the second hook arm (7) are both arc-shaped structures.

3. The DC circuit breaker mechanical spring operating device according to claim 1, characterized in that: The first control mechanism (1) comprises an energy storage regulating body (8) and a control supporting body (9), wherein the energy storage regulating body (8) is arranged on the control supporting body (9); The energy storage regulating body (8) comprises an extrusion sliding push block (10), a spring (13), a control rope (15), a limit plate (16) and a fixed ring (17). Two limit plates (16) are provided. The two limit plates (16) are respectively fixed on two sides of the fixed ring (17). A limit groove (12) is provided on each limit plate (16). One end of the spring (13) is fixedly connected to the fixed ring (17). The other end of the spring (13) is connected to the extrusion sliding push block (10). A sliding card (11) is respectively fixed on two sides of the extrusion sliding push block (10). The two sliding card plates (11) are respectively slidably connected to the two limit grooves (12). One end of the control rope (15) is connected to the sliding card plate (11). A driving motor (21) is installed on the control support body (9), a winding wheel (25) is connected to the output shaft of the driving motor (21), and one end of the control rope (15) away from the sliding card plate (11) is connected to the winding wheel (25).

4. The DC circuit breaker mechanical spring operating device according to claim 3, characterized in that: A distance measuring sensor (14) is installed on the position limiting vertical plate (16).

5. The DC circuit breaker mechanical spring operating device according to claim 4, characterized in that: The distance measuring sensor (14) is a laser distance measuring sensor.

6. The DC circuit breaker mechanical spring operating device according to claim 3, characterized in that: The control support body (9) comprises a fixed base (18), a fixed disk (22), a connecting column (23), a mounting disk (24) and a fixing bolt (26); two mounting disks (24) are provided, and the two mounting disks (24) are respectively fixedly mounted on two sides of the fixed base (18) by the fixing bolts (26); the fixed disk (22) is fixedly mounted on the outer side of the mounting disk (24) by the connecting column (23); the driving motor (21) is fixedly mounted on the fixing disk (22); the output shaft of the driving motor (21) passes through the fixing disk (22); and the winding wheel (25) is rotatably connected between the mounting disk (24) and the fixing disk (22).

7. The DC circuit breaker mechanical spring operating device according to claim 6, characterized in that: The fixed base (18) is connected to a telescopic device (19).

8. The DC circuit breaker mechanical spring operating device according to claim 7, characterized in that: The telescopic device (19) is an electric push rod.

9. The DC circuit breaker mechanical spring operating device according to claim 7, characterized in that: One end of the telescopic device (19) away from the fixed base (18) is connected to a fixed mounting seat (20).

10. The DC circuit breaker mechanical spring operating device according to claim 3, characterized in that: The extrusion sliding push block (10) in the first control mechanism (1) is hinged to the middle part of the first hook arm (2); The squeezing sliding push block (10) in the second control mechanism (5) is hinged to the middle part of the second hook arm (7).

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