A mechanical spring operating device for a DC circuit breaker

Abstract

The present invention discloses a mechanical spring operating device for a DC circuit breaker, relating to the technical field of circuit breaker operating mechanisms, comprising a first control mechanism, a first hook arm, a second control mechanism, a second hook arm, and a controller; the first end of the first hook arm and the first end of the second hook arm are both rotatably connected to a mounting base, the second end of the first hook arm and the second end of the second hook arm are both mounted with a pressure sensor, and a hook is mounted on the pressure sensor; the first control mechanism is connected to the first hook arm and can drive the first hook arm to rotate, the second control mechanism is connected to the second hook arm and can drive the second hook arm to rotate, and the hook on the first hook arm and the hook on the second hook arm can contact each other; the first control mechanism, the second control mechanism, and the pressure sensor are all electrically connected to the controller. The present invention can achieve fast and accurate opening and closing operations, and has a simple structure, is easy to operate, and is suitable for long-term stable use.

Description

Technical Field

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

[0002] Circuit breakers are one of the most important components in power systems. Closing and opening circuit breakers are driven by operating mechanisms. Mechanical spring-energy storage mechanisms are the most commonly used type of circuit breaker operating mechanism in power systems. Generally speaking, the energy storage components in this type of operating mechanism are closing and opening springs. The operating mechanism also contains an actuator that converts the closing spring's energy into closing power and stores energy for the opening spring. The actuator also converts the opening spring's energy into opening power.

[0003] Most of the existing circuit breaker operating mechanisms are as shown in the "A Mechanical Operating Mechanism for Circuit Breakers" disclosed in the existing patent publication number CN104021954A. The existing technology includes a transmission part module M1 and a spring part module M2, wherein the spring part module M2 is provided with a closing spring limiting groove and an opening spring sliding clamping plate, wherein the closing spring limiting groove and the opening spring sliding clamping plate are cylindrical coil springs, and the two are arranged in a co-cylinder manner, and the closing spring limiting groove with a larger diameter is sleeved on the outside of 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, so that the connected hook energy storage closing and opening cannot be completed automatically, quickly and accurately, and the existing DC circuit breaker mechanical spring operating mechanism is inconvenient to use and operate.

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

[0006] The object 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 fast and accurate opening and closing operations and is easy to use.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention discloses a mechanical spring operating device for a DC circuit breaker, comprising a first control mechanism, a first hook arm, a second control mechanism, a second hook arm, and a controller. The first control mechanism and the second control mechanism have the same structure, and the first hook arm and the second hook arm have the same structure.

[0009] The first end of the first hook arm and the first end of the second hook arm are both rotatably connected to the mounting base, the second end of the first hook arm and the second end of the second hook arm are both installed with a pressure sensor, and a hook is installed on the pressure sensor;

[0010] The first control mechanism is connected to the first hook arm and can drive the first hook arm to rotate, the second control mechanism is connected to the second hook arm and can drive the second hook arm to rotate, and the hook on the first hook arm and the hook on the second hook arm can contact each other;

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

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

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

[0014] The energy storage adjustment body includes an extrusion sliding push block, a spring, a control rope, a limit vertical plate and a fixed ring, wherein two limit vertical plates are provided, and the two limit vertical plates are respectively fixed on both sides of the fixed ring, and each limit vertical plate is provided with a limit groove, one end of the spring is fixedly connected to the fixed ring, and the other end of the spring is connected to the extrusion sliding push block, and a sliding card is respectively fixed on both sides of the extrusion sliding push block, and the two sliding card plates are respectively slidably connected to the two limit grooves, and one end of the control rope is connected to the sliding card plate;

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

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

[0017] Preferably, the ranging sensor is a laser ranging sensor.

[0018] Preferably, the control support 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 mounted on both sides of the fixed base through the fixing bolts. The fixed disk is fixedly mounted on the outer side of the mounting disk through the connecting column. The drive motor is fixedly mounted on the fixed disk, and the output shaft of the drive motor passes through the fixed disk. The winding wheel is rotatably connected between the mounting disk and the fixed disk.

[0019] Preferably, the fixed base is connected to 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 to a fixed mounting seat.

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

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

[0024] Compared with the prior art, the present invention has achieved the following technical effects:

[0025] The present invention utilizes only the first and second control mechanisms to respectively drive the first and second hook arms to rotate. When the hooks on the first and second hook arms approach and contact each other, the circuit breaker is closed. When the hooks on the first and second hook arms separate, the circuit breaker is opened. The entire process is controlled entirely by the first and second control mechanisms, making operation simple. Furthermore, due to its simple structure, manufacturing costs are low, and there is no complex transmission connection involved, enabling faster and more accurate responses to the closing and opening processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

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

[0029] Figure 3 Schematic diagram of the structure of the first control mechanism in the mechanical spring operating device of the DC circuit breaker according to an embodiment of the present invention;

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

[0031] Figure 5This is a structural diagram of a control support body in a mechanical spring operating device for a DC circuit breaker according to an 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 body; 9-control support body; 10-extrusion sliding push block; 11-sliding card plate; 12-limiting groove; 13-spring; 14-distance measuring sensor; 15-control rope; 16-limiting vertical plate; 17-fixing ring; 18-fixed base; 19-telescopic device; 20-fixed mounting seat; 21-drive motor; 22-fixing disk; 23-connecting column; 24-mounting disk; 25-winding wheel; 26-fixing bolt. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The object 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 fast and accurate opening and closing operations and is easy to use.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1-Figure 5 As shown, this embodiment provides a mechanical spring operating device for a DC circuit breaker, comprising a first control mechanism 1, a first hook arm 2, a second control mechanism 5, a second hook arm 7, and a controller. 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 connections between the various components are as follows:

[0037] 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, which is mounted within the circuit breaker housing via screws. The first end of the first hook arm 2 and the second hook arm 7 are both connected to a connecting wire. To achieve the rotatable connection between the first hook arm 2 and the second hook arm 7, a rotating ring is provided at one end of the first hook arm 2 and the second hook arm 7 near the corresponding mounting base 6, and the mounting base 6 is provided with a corresponding fixed cylinder. The rotating ring is sleeved on the fixed cylinder and rotatably connected thereto. The second end of the first hook arm 2 and the second end of the second hook arm 7 are both mounted with a pressure sensor 4. The pressure sensor 4 is mounted with a hook 3. Each hook 3 is provided with hook teeth and hook grooves arranged along a straight line and staggered. When the two hooks 3 are in contact, the hook teeth of one hook 3 hook into the groove of the other hook 3, further strengthening the connection 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. When the first hook arm 2 and the second hook arm 7 rotate to a certain angle, the hook 3 on the first hook arm 2 and the hook 3 on the second hook arm 7 can contact or separate.

[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 control the operation of the first control mechanism 1 and the second control mechanism 5.

[0040] In 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. If it is necessary to close the circuit, it is only necessary to control the adjacent ends of the first hook arm 2 and the second hook arm 7 to rotate in a direction close to each other, so that the hooks 3 on the first hook arm 2 and the second hook arm 7 gradually approach each other until they fit together. At this time, the pressure sensor 4 senses the pressure on the hooks 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 the circuit is in the closed state. If it is necessary to open the circuit, it is only necessary to control the adjacent ends of the first hook arm 2 and the second hook arm 7 to rotate in a direction 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 no longer in contact, the circuit is in the open state.

[0041] In this embodiment, both the first hook arm 2 and the second hook arm 7 are arc-shaped. This arc-shaped structure is provided to facilitate contact between the corresponding hook teeth and grooves on the two hooks 3. Of course, those skilled in the art may adjust the specific shapes and sizes of the first hook arm 2 and the second hook arm 7 according to actual needs, and are not limited to this embodiment.

[0042] In this embodiment, if Figure 3 As shown, the first control mechanism 1 includes an energy storage adjustment body 8 and a control support body 9. The energy storage adjustment body 8 is mounted on the control support body 9, and the end of the energy storage adjustment body 8 away from the control support body 9 is used for articulation with the first hook arm 2, while the end of the control support body 9 away from the energy storage adjustment body 8 is used for articulation with the interior of the circuit breaker housing. Since the second control mechanism 5 and the first control mechanism 1 have identical structures, only the first control mechanism 1 will be used as an example for description. The specific structures of the energy storage adjustment body 8 and the control support body 9 are as follows:

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

[0044] like Figure 5 As shown, a drive motor 21 is installed on the control support body 9. The drive 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 drive motor 21, and the end of the control rope 15 away from the sliding card 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 drive motor 21 is started to drive the winding wheel 25 to rotate, and the control rope 15 can be wound through the winding wheel 25. In the process of winding the control rope 15, the sliding card plate 11 can be driven to slide downward along the limit groove 12, so that the sliding card plate 11 and the extrusion sliding push block 10 compress the spring 13 and fully store energy. At this 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. The pressure sensor 4 can detect the extrusion force between the hooks 3 to determine whether the hooks 3 are in close contact, and the technical effect of closing the circuit breaker is achieved while fully storing energy. When it is necessary to open the circuit breaker, the drive motor 21 can drive the winding wheel 25 to reverse rapidly, so that the control rope 15 wound on the winding wheel 25 is quickly released, the sliding card plate 11 slides upward rapidly along the limit groove 12, and the energy-stored spring 13 stretches and opens, so that the corresponding first hook arm 2 and the second hook arm 7 rotate, so that the hooks 3 are separated to achieve the technical effect of opening the circuit breaker.

[0046] In this embodiment, a distance measuring sensor 14 is installed on the limiting plate 16. The distance measuring sensor 14 is installed at one end in the limiting groove 12 and is electrically connected to the controller. Its function is to measure the distance between it and the sliding card plate 11 and transmit the corresponding distance signal to the controller, which then 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 that can measure distance, such as photoelectric sensors, etc. Of course, if necessary, a corresponding reflective plate can be provided on the sliding card plate 11 to meet the use conditions of the sensor.

[0048] In this embodiment, if Figure 5 As shown, the control support body 9 includes a fixed base 18, a fixed plate 22, connecting columns 23, a mounting plate 24, and fixing bolts 26. Two mounting plates 24 are provided, each fixedly mounted on either side of the fixed base 18 via fixing bolts 26. The fixed plate 22 is fixedly mounted on the outside of the mounting plate 24 via connecting columns 23. Specifically, the fixed plate and mounting plate 24 are respectively fixed to the ends of the multiple connecting columns 23. A drive motor 21 is fixedly mounted on the fixed plate 22, and the output shaft of the drive motor 21 passes through the fixed plate 22, allowing the winding wheel 25 to rotatably connect between the mounting plate 24 and the fixed plate 22.

[0049] In this embodiment, the fixed base 18 is connected to a telescopic device 19. During continuous use, if the elastic energy storage performance of the spring 13 is poor, the telescopic device 19 can drive the fixed base 18 to rise and fall, so that the fixed base 18 squeezes the fixed ring 17 and the bottom of the spring 13, adjusting and controlling the energy storage performance of the spring 13. The distance sensor 14 can detect the position of the sliding card plate 11 and the squeezing sliding push block 10, ensuring accurate energy storage of the spring 13.

[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, the end of the telescopic device 19 away from the fixed base 18 is connected to the fixed mounting base 20. The telescopic device 19 and the fixed mounting base 20 are specifically hingedly connected. Specifically, the telescopic device 19 and the fixed mounting base 20 are provided with corresponding hinge holes, and then a hinge pin is sequentially passed through the corresponding hinge holes to achieve the hinge connection. The purpose of this arrangement is to enable the first control mechanism 1 to extend and retract and rotate accordingly during the rotation of the first hook arm 2.

[0052] In this embodiment, the extrusion sliding push block 10 in the first control mechanism 1 is hinged to the middle portion 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. Then, a hinge pin can be passed through the two hinge rings to achieve the hinge connection 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 part of the second hook arm 7, and its hinged connection is also connected through a hinge ring and a hinge pin, so it will not be repeated here.

[0054] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting 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; The first control mechanism (1) comprises an energy storage regulating body (8) and a control support body (9), wherein the energy storage regulating body (8) is arranged on the control support body (9); The energy storage regulating body (8) comprises an extrusion sliding push block (10), a spring (13), a control rope (15), a limiting vertical plate (16) and a fixed ring (17), wherein two limiting vertical plates (16) are provided, and the two limiting vertical plates (16) are respectively fixed on both sides of the fixed ring (17), and each limiting vertical plate (16) is provided with a limiting groove (12), one end of the spring (13) is fixedly connected to the fixed ring (17), and the other end of the spring (13) is connected to the extrusion sliding push block (10), and a sliding card (11) is respectively fixed on both sides of the extrusion sliding push block (10), and the two sliding card plates (11) are respectively slidably connected to the two limiting grooves (12), and 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).

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 mechanical spring operating device for a DC circuit breaker according to claim 1, characterized in that: A distance measuring sensor (14) is installed on the position-limiting vertical plate (16).

4. The mechanical spring operating device for a DC circuit breaker according to claim 3, characterized in that: The distance measuring sensor (14) is a laser distance measuring sensor.

5. The mechanical spring operating device for DC circuit breaker according to claim 1, 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. The two mounting disks (24) are fixedly mounted on both sides of the fixed base (18) respectively through the fixing bolts (26). The fixing disk (22) is fixedly mounted on the outer side of the mounting disk (24) through 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). The winding wheel (25) is rotatably connected between the mounting disk (24) and the fixing disk (22).

6. The DC circuit breaker mechanical spring operating device according to claim 5, characterized in that: The fixed base (18) is connected to a telescopic device (19).

7. The DC circuit breaker mechanical spring operating device according to claim 6, characterized in that: The telescopic device (19) is an electric push rod.

8. The DC circuit breaker mechanical spring operating device according to claim 6, characterized in that: One end of the telescopic device (19) away from the fixed base (18) is connected to a fixed mounting seat (20).

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