Non-magnetic manual operating transmission shaft for circuit breaker and circuit breaker

Abstract

The utility model belongs to high -voltage switch technical field especially relates to a non -magnetic manual operation transmission shaft for circuit breaker and circuit breaker, include: insulating transmission shaft and mounting seat, both ends of insulating transmission shaft are installed in mounting seat, mounting seat is installed in circuit breaker, be provided with manual crank arm, opening crank arm, proximity switch detection board and indicating pick in insulating transmission shaft, manual crank arm and indicating pick are away from the side that circuit breaker in magnetic operating mechanism is set to, opening crank arm, proximity switch detection board are set to the side that circuit breaker in magnetic operating mechanism is close to. Through setting the utility model in circuit breaker, can realize the manual opening operation of circuit breaker, can intuitively check the current opening and closing state of circuit breaker simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of high voltage switch technology, and in particular relates to a non-magnetic manual operation transmission shaft for circuit breakers and a circuit breaker. Background Technology

[0002] With the advancement of science and technology and society, all sectors are increasingly aware of and demanding higher standards for power quality. While electricity benefits humanity, improper control during its use can lead to unexpected losses or even disasters. Therefore, when electrical appliances or power lines malfunction, the ideal outcome is to disconnect the power line and isolate the fault point in a very short time. The electrical device with the strongest protection function for power lines is the circuit breaker.

[0003] In existing technologies, circuit breakers mainly employ permanent magnet or magnetically controlled operating mechanisms. Besides offering very short opening and closing times, these mechanisms also significantly improve reliability because their components are only 1 / 10 the size of those in spring-operated mechanisms. However, permanent magnet or magnetically controlled mechanisms also have drawbacks, namely, inconvenient manual operation. Currently, manually operated permanent magnet or magnetically controlled mechanisms are more popular in the market. Since permanent magnet or magnetically controlled mechanisms utilize strong magnetic fields to generate strong attractive or repulsive forces to achieve circuit breaker opening and closing, research has found that using carbon steel for the operating shafts that enable simultaneous three-phase opening of the circuit breaker can cause changes in the magnetic field of the three-phase permanent magnet or magnetically controlled mechanism. This results in changes in the holding force of each phase mechanism in the closed state. In unfavorable situations, the holding force of one phase mechanism may be insufficient to maintain normal closing function, posing a potential safety hazard to product operation. Summary of the Invention

[0004] This utility model provides a non-magnetic manual operation drive shaft for circuit breakers and a circuit breaker, which solves the problem of inconvenient manual operation of magnetic or magnetically controlled operating mechanisms in the prior art.

[0005] One technical solution of this utility model is as follows: A non-magnetic manual operation drive shaft for a circuit breaker includes: an insulated drive shaft and a mounting base. Both ends of the insulated drive shaft are installed in the mounting base, and the mounting base is installed in the circuit breaker. The insulated drive shaft is provided with a manual crank arm, a tripping crank arm, a proximity switch detection plate, and an indicator pin. The manual crank arm and the indicator pin are arranged facing away from the magnetic operating mechanism in the circuit breaker, and the tripping crank arm and the proximity switch detection plate are arranged facing closer to the magnetic operating mechanism in the circuit breaker.

[0006] Furthermore, the material of the insulated drive shaft is an epoxy resin glass fiber composite material.

[0007] Furthermore, the mounting base is a bearing housing.

[0008] Furthermore, the proximity switch detection plate is mounted on the insulated drive shaft by bolts.

[0009] Another technical solution of this utility model is as follows: A circuit breaker includes: a housing, a manual tripping lever mechanism, a magnetic operating mechanism, a proximity switch, an open / close indicator mechanism, and a non-magnetic manual operation transmission shaft for the circuit breaker as described above. The magnetic operating mechanism, the proximity switch, the insulated transmission shaft, and the mounting base are disposed within the housing. The manual tripping lever mechanism and the open / close indicator mechanism are disposed on the housing. The manual crank arm is connected to the manual tripping lever mechanism of the circuit breaker. The tripping crank arm is connected to the magnetic operating mechanism of the circuit breaker. The proximity switch detection plate is aligned with the proximity switch of the circuit breaker. The indicator pin is connected to the open / close indicator mechanism.

[0010] Furthermore, the manual tripping lever mechanism includes: a tripping handle, a transmission crank arm, and a transmission crank arm shaft. The tripping handle and the tripping crank arm are respectively disposed at both ends of the transmission crank arm shaft, which is disposed through the housing. The transmission crank arm is connected to the manual crank arm.

[0011] Furthermore, the split-opening indicator mechanism includes: an indicator needle, an indicator plate, an indicator shaft, and an indicator crank arm. The indicator needle and the indicator crank arm are respectively disposed at both ends of the indicator shaft. The indicator shaft passes through the housing. The indicator plate is disposed on the outside of the housing. The indicator needle is aligned with the indicator plate. The indicator pin is connected to the indicator crank arm.

[0012] The beneficial effects of this utility model are: by incorporating this utility model into the circuit breaker, manual tripping operation of the circuit breaker can be achieved, and the current tripping status of the circuit breaker can be viewed intuitively.

[0013] When circuit breakers operating outdoors encounter severe weather and are struck by lightning, or when there are frequent operational overvoltages on the line, or unexpected phase-to-phase short circuits, the operating switching equipment may lose its operating power. In such cases, the switching equipment can be disconnected by manual tripping, so that the switch can be inspected and maintained on site. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the non-magnetic manual operation transmission shaft in this utility model.

[0015] Figure 2 This is a side view of the non-magnetic manual operation transmission shaft in this utility model.

[0016] Figure 3 This is a schematic diagram of one embodiment of the circuit breaker of this utility model.

[0017] Figure 4 This is a schematic diagram of another embodiment of the circuit breaker of this utility model.

[0018] Figure 5 This is a front view of the circuit breaker of this utility model.

[0019] Figure 6 This is a schematic diagram of the manual tripping lever mechanism in this utility model. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] In one technical solution of this utility model, Figure 1 and Figure 2 This is a structural diagram illustrating the specific structure of a non-magnetic manual operation transmission shaft for a circuit breaker according to this utility model. Figure 1 and Figure 2 As shown, this utility model includes:

[0022] An insulated drive shaft 1 and a mounting base 2 are provided. Both ends of the insulated drive shaft 1 are installed in the mounting base 2, which is installed in the circuit breaker. The insulated drive shaft 1 is provided with a manual crank arm 3, a tripping crank arm 4, a proximity switch 10 detection plate 5, and an indicator pin 6. The manual crank arm 3 and the indicator pin 6 are arranged facing away from the magnetic operating mechanism 9 in the circuit breaker, while the tripping crank arm 4 and the proximity switch 10 detection plate 5 are arranged facing closer to the magnetic operating mechanism 9 in the circuit breaker.

[0023] The included angle between the manual crank arm 3 and the tripping crank arm 4 is close to 180°. The manual crank arm 3 is connected to the manual tripping lever mechanism of the vacuum circuit breaker. The user can drive the manual crank arm 3 by operating the tripping handle 11 outside the circuit breaker housing 8, thereby causing the insulated drive shaft 1 to rotate, and then the tripping crank arm 4 to move. The tripping crank arm 4 is connected to the magnetic operating mechanism 9 in the vacuum circuit breaker and is used to perform the tripping operation on the magnetic operating mechanism 9. As the insulated drive shaft 1 rotates, the tripping crank arm 4 moves the magnetic operating mechanism 9 to perform the tripping operation.

[0024] The proximity switch 10 detection plate 5 faces the proximity switch 10 in the vacuum circuit breaker. The proximity switch 10 detection plate 5 is also a bent plate that rotates together with the insulated drive shaft 1. This bent plate is installed next to the proximity switch 10 beside the drive shaft. The proximity switch 10 detects the position of the proximity switch 10 detection plate 5 to inform the controller of the current open / closed state of the circuit breaker. The indicator pin 6 is drive-connected to the indicator needle 14 on the circuit breaker, which indicates the open / closed state, thus informing the user of the current status of the circuit breaker.

[0025] In one embodiment of this technical solution, the material of the insulated drive shaft 1 is an epoxy resin glass fiber composite material. Specifically, the insulated drive shaft 1 is a shaft component made of insulating material, including hexagonal epoxy glass cloth rod material, and SMC, DMC, and BMC materials made of epoxy resin and glass fiber, which are hot-pressed into a drive shaft by a mold.

[0026] In one embodiment of this technical solution, the mounting base 2 is a bearing housing.

[0027] Both ends of the insulated drive shaft 1 are installed in bearing housings, which are fixed on the product housing 8 and provide support for the insulated drive shaft 1. The ball bearings installed in the bearing housings can reduce the friction caused by the rotation of the drive shaft.

[0028] In one embodiment of this technical solution, the proximity switch 10 detection plate 5 is mounted on the insulated drive shaft 1 by bolts 7.

[0029] In another technical solution of this utility model, Figures 3-6 This is a structural diagram provided based on an embodiment of the circuit breaker. Specifically, the circuit breaker requires the aforementioned non-magnetic manual operation drive shaft. For example... Figures 3-6 As shown, this technical solution further includes:

[0030] The circuit breaker includes: a housing 8, a manual tripping lever mechanism, a magnetic operating mechanism 9, a proximity switch 10, an open / close indicator mechanism, and a non-magnetic manual operating drive shaft for the circuit breaker as described above. The magnetic operating mechanism 9, the proximity switch 10, the insulated drive shaft 1, and the mounting base 2 are disposed within the housing 8. The manual tripping lever mechanism and the open / close indicator mechanism are disposed on the housing 8. The manual crank arm 3 is connected to the manual tripping lever mechanism of the circuit breaker. The tripping crank arm 4 is connected to the magnetic operating mechanism 9 of the circuit breaker. The proximity switch 10 detection plate 5 is aligned with the proximity switch 10 of the circuit breaker. The indicator pin 6 is connected to the open / close indicator mechanism.

[0031] like Figure 3 and Figure 4 As shown, Figure 3 and Figure 4These are schematic diagrams showing whether the magnetic operating mechanism 9 is a small permanent magnet mechanism or a magnetic control mechanism. When the magnetic operating mechanism 9 is a small permanent magnet mechanism, a non-magnetic hand-operated transmission shaft operates the arc-extinguishing chamber of the three-phase circuit breaker. For this purpose, the insulated transmission shaft 1 is equipped with three tripping cranks 4.

[0032] When the magnetic operating mechanism 9 is a magnetically controlled mechanism, a non-magnetic hand-operated transmission shaft operates the arc-extinguishing chamber of one phase of the circuit breaker, and the arc-extinguishing chambers of the other two phases can be simultaneously tripped by the back electromotive force of the opening and closing coils of the mechanism. For this purpose, the insulated transmission shaft 1 is equipped with a tripping crank arm 4.

[0033] The specific structures of the small permanent magnet mechanism and the magnetic control mechanism are conventional techniques in this field, and therefore will not be described in detail here.

[0034] like Figure 6 As shown, the manual tripping lever mechanism includes: a tripping handle 11, a transmission crank arm 12, and a transmission crank arm shaft 13. The tripping handle 11 and the tripping crank arm 12 are respectively disposed at both ends of the transmission crank arm shaft 13. The transmission crank arm shaft 13 is disposed through the housing 8. The transmission crank arm 12 is connected to the manual crank arm 3.

[0035] A reset spring pin 14 is provided on the transmission crank arm shaft 13. The reset spring pin is used to install one end of the reset spring. The other end of the reset spring is connected to the connecting pin on the housing. When the opening handle is operated, the opening handle can be reset to the initial position through the opening spring.

[0036] like Figure 3 , Figure 4 , Figure 5 As shown, the opening / closing indicator mechanism includes: an indicator needle 14, an indicator plate 15, an indicator shaft 16, and an indicator crank arm 17. The indicator needle 14 and the indicator crank arm 17 are respectively disposed at both ends of the indicator shaft 16, which passes through the housing 8. The indicator plate 15 is disposed on the outside of the housing 8, and the indicator needle 14 is aligned with the indicator plate 15. The indicator pin 6 is connected to the indicator crank arm 17. The indicator plate 15 is engraved with the words "open" and "closed." The indicator needle moves between opening and closing states by the rotation of the insulated drive shaft to indicate the opening / closing status.

[0037] By incorporating this invention into a circuit breaker, manual tripping of the circuit breaker can be achieved, and the current tripping status of the circuit breaker can be viewed intuitively.

[0038] When circuit breakers operating outdoors encounter severe weather and are struck by lightning, or when there are frequent operational overvoltages on the line, or unexpected phase-to-phase short circuits, the operating switching equipment may lose its operating power. In such cases, the switching equipment can be disconnected by manual tripping, so that the switch can be inspected and maintained on site.

[0039] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A non-magnetic manual operation drive shaft for a circuit breaker, characterized in that, include: An insulated drive shaft (1) and a mounting base (2) are provided. Both ends of the insulated drive shaft (1) are installed in the mounting base (2). The mounting base (2) is installed in the circuit breaker. The insulated drive shaft (1) is provided with a manual crank arm (3), a trip crank arm (4), a proximity switch (10) detection plate (5) and an indicator pin (6). The manual crank arm (3) and the indicator pin (6) are arranged facing away from the magnetic operating mechanism (9) in the circuit breaker. The trip crank arm (4) and the proximity switch (10) detection plate (5) are arranged facing close to the magnetic operating mechanism (9) in the circuit breaker.

2. The non-magnetic manual operation drive shaft for a circuit breaker as described in claim 1, characterized in that, The material of the insulated drive shaft (1) is epoxy resin glass fiber composite material.

3. The non-magnetic manual operation drive shaft for a circuit breaker as described in claim 1, characterized in that, The mounting base (2) is a bearing housing.

4. The non-magnetic manual operation drive shaft for a circuit breaker as described in claim 1, characterized in that, The proximity switch (10) detection plate (5) is mounted on the insulated drive shaft (1) by bolts (7).

5. A circuit breaker, characterized in that, include: The circuit breaker comprises a housing (8), a manual tripping lever mechanism, a magnetic operating mechanism (9), a proximity switch (10), an opening / closing indicator mechanism, and a non-magnetic manual operating drive shaft as described in any one of claims 1-4. The magnetic operating mechanism (9), the proximity switch (10), the insulated drive shaft (1), and the mounting base (2) are disposed within the housing (8). The manual tripping lever mechanism and the opening / closing indicator mechanism are disposed on the housing (8). The manual crank arm (3) is connected to the manual tripping lever mechanism of the circuit breaker. The tripping crank arm (4) is connected to the magnetic operating mechanism (9) of the circuit breaker. The proximity switch (10) detection plate (5) is aligned with the proximity switch (10) of the circuit breaker. The indicator pin (6) is connected to the opening / closing indicator mechanism.

6. The circuit breaker as described in claim 5, characterized in that, The manual tripping lever mechanism includes: a tripping handle (11), a transmission crank arm (12), and a transmission crank arm shaft (13). The tripping handle (11) and the tripping crank arm (4) are respectively located at both ends of the transmission crank arm shaft (13). The transmission crank arm shaft (13) is installed through the housing (8). The transmission crank arm (12) is connected to the manual crank arm (3).

7. The circuit breaker as claimed in claim 4, characterized in that, The opening and closing indicator mechanism includes: an indicator needle (14), an indicator plate (15), an indicator shaft (16), and an indicator crank arm (17). The indicator needle (14) and the indicator crank arm (17) are respectively disposed at both ends of the indicator shaft (16). The indicator shaft (16) is disposed through the housing (8). The indicator plate (15) is disposed on the outside of the housing (8). The indicator needle (14) is aligned with the indicator plate (15). The indicator pin (6) is connected to the indicator crank arm (17).

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