Capacitor arrangement structure for generator circuit breaker and generator comprising capacitor arrangement structure

Abstract

The utility model belongs to the technical field of high-voltage electrical appliances, and relates to a capacitor arrangement structure for a generator circuit breaker. The capacitor arrangement structure comprises a box body which is internally provided with a circuit breaker and a capacitor; the capacitor is mounted below the circuit breaker; the upper part of the capacitor is connected with the bottom of the breaker. The lower part of the capacitor is fixedly connected with the box body; a moving contact is arranged in the circuit breaker, and the moving contact is connected with a rotating shaft; the rotating shaft comprises a middle barrel and metal connectors connected to the two ends of the middle barrel, springs are installed at the two ends in the middle barrel respectively, and the springs are in a compressed state in the initial state; a capacitor column is installed between the two springs, and the capacitor column is formed by connecting a plurality of capacitors in series. The capacitor is fixed below the circuit breaker or in the rotating shaft, no capacitor is arranged above the box body, the height of the whole box body is reduced, meanwhile, large vibration cannot be generated in the switching-on and switching-off processes of the generator circuit breaker, and the installation reliability of the capacitor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage electrical appliances, and relates to a capacitor arrangement structure for a generator circuit breaker and a generator containing the same. Background Art

[0002] When installing a capacitor 3 in a circuit breaker 2 of a generator, one end of the capacitor 3 is grounded, and the other end is connected to the main circuit through a wire. The capacitor 3 is connected in parallel at both ends of the circuit breaker 2 of the generator, and mainly plays a role in improving the performance of the circuit breaker 2. During the process of opening the circuit breaker 2, the transient recovery voltage (TRV) is very large. The capacitor 3 can absorb the overvoltage and overcurrent generated during the operation of the circuit breaker 2. By connecting the capacitor 3 in parallel in the circuit breaker 2, the rising rate of the TRV is reduced, the working conditions of the arc extinguishing chamber are improved, and the arc extinguishing performance of the arc extinguishing chamber is enhanced.

[0003] The capacitor 3 in the circuit breaker 2 is generally connected in parallel on both sides of the circuit breaker 2 through electrical connection. The specific connection structure is as shown in Figure 1 Figures a and b. One end of the capacitor 3 is fixedly connected to a metal bracket through a bolt, and the metal bracket is fixedly suspended above the box body 1, and the outer shell of the box body 1 is grounded. The other end of the capacitor 3 is connected to the circuit breaker 2 through a wire.

[0004] Since the capacitor 3 is suspended above the box body 1 through a capacitor mounting bracket plate and a flat plate, the height of the box body 1 has to be increased, resulting in waste of the internal space of the box body 1; and the capacitor 3 for the circuit breaker 2 has a large capacitance value, a large weight, and a large volume. During the closing and opening processes of the circuit breaker 2, large vibrations will be generated, reducing the reliability of the installation of the capacitor 3. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a capacitor arrangement structure for a generator circuit breaker and a generator containing the same, which solves the problems of waste of internal space caused by the high height of the existing generator box body and unreliable installation of the capacitor.

[0006] The utility model is realized by the following technical solutions:

[0007] The utility model discloses a capacitor arrangement structure for a generator circuit breaker, including a box body, in which a circuit breaker and a capacitor are provided;

[0008] The capacitor is installed below the circuit breaker;

[0009] The upper part of the capacitor is connected to the bottom of the circuit breaker; the lower part of the capacitor is fixedly connected to the box body.

[0010] Further, the upper part of the capacitor is fixedly connected to the support frame at the bottom of the circuit breaker; the lower part of the capacitor is fixedly connected to the bottom plate of the box body.

[0011] Furthermore, metal flanges are provided at both ends of the capacitor; the metal flange at the upper part of the capacitor is bolted to the support frame, and the metal flange at the lower part of the capacitor is bolted to the bottom plate of the box body.

[0012] Furthermore, threaded holes are prefabricated on the metal flange.

[0013] Furthermore, a moving contact is provided in the circuit breaker, and the moving contact is connected with a rotating shaft;

[0014] The rotating shaft includes an intermediate cylinder body and metal joints connected to both ends of the intermediate cylinder body. Springs are respectively installed at both ends inside the intermediate cylinder body, and the springs are in a compressed state in the initial state;

[0015] A capacitor column is installed between the two springs, and the capacitor column is formed by connecting a plurality of capacitors in series.

[0016] Furthermore, one metal joint of the rotating shaft is connected to the moving contact through a kinematic pair, and the other metal joint is connected to the transmission system of the operating mechanism through a kinematic pair.

[0017] Furthermore, the intermediate cylinder body is made of insulating material.

[0018] The utility model also discloses a generator containing the capacitor arrangement structure.

[0019] Compared with the prior art, the utility model has the following beneficial technical effects:

[0020] The utility model discloses a capacitor arrangement structure for a generator circuit breaker. The upper part of the capacitor is connected to the bottom of the circuit breaker; the lower part of the capacitor is fixedly connected to the box body. In this way, the capacitor is fixed below the circuit breaker, integrating the insulation support function of the original insulation support below the circuit breaker. The capacitor can play an insulation support role and also play a fixed support role for the circuit breaker. The structure is simpler. The capacitor is installed below the circuit breaker, and there is no need to hang the capacitor in the upper space of the box body, reducing the height of the entire box body. At the same time, the capacitor is fixedly connected between the bottom plate of the box body and the circuit breaker, with stable installation. During the closing and opening processes of the generator circuit breaker, no large vibration will occur, improving the reliability of the capacitor installation.

[0021] Furthermore, the middle of the capacitor rotating shaft is made of hollow insulating material. At both ends inside the hollow part, a spring is installed respectively, and both springs are in a compressed state. Inside the middle of the two springs, a capacitor column composed of several capacitors connected in series is filled. Due to the spring force, the capacitors are tightly combined together and firmly fixed inside the rotating shaft. Comparing the arrangement structure of the capacitor rotating shaft with the existing rotating shaft arrangement structure, on the one hand, since the capacitor is installed inside the rotating shaft, the height of the box body can be considered to be reduced, reducing the occupied space of the product; on the other hand, both ends of the capacitor are respectively connected to the compressed springs, which can be reliably fixed inside the rotating shaft, solving the problem that the capacitor is not firmly installed above the box body. Brief Description of the Drawings

[0022] Figure 1 FIG. is a structural diagram of the capacitor arrangement of the generator circuit breaker in the prior art; FIG. a is the front view; FIG. b is the side view;

[0023] Figure 2 FIG. is a schematic diagram of the connection structure between the generator circuit breaker and the rotating shaft in the prior art;

[0024] Figure 3 FIG. is a schematic diagram of the capacitor arrangement structure of the generator circuit breaker in Embodiment 1; FIG. a is the front view; FIG. b is the side view;

[0025] Figure 4 For Figure 3 Partial enlarged view of FIG. a in

[0026] Figure 5 FIG. is a schematic diagram of the structure of the improved rotating shaft;

[0027] Figure 6 For the Figure 5 Schematic diagram of the connection structure between the generator circuit breaker and the rotating shaft after installing the rotating shaft;

[0028] Figure 7 FIG. is a schematic diagram of the capacitor arrangement structure of the generator circuit breaker corresponding to Embodiment 3;

[0029] Wherein, 1, box body; 2, circuit breaker; 3, capacitor; 4, support frame; 5, insulating support; 6, rotating shaft;

[0030] 31, metal flange;

[0031] 61, spring; 62, capacitor column; 63, metal joint. Detailed Embodiment

[0032] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments.

[0033] The components described and shown in the accompanying drawings and embodiments of the present utility model can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present utility model provided in the following drawings is not intended to limit the scope of the present utility model to be protected, but only represents a selected embodiment of the present utility model. Based on the accompanying drawings and embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present utility model.

[0034] It should be noted that the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that a process, element, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to the process, element, method, article or device.

[0035] The features and performance of the present utility model are further described in detail below in conjunction with the embodiments.

[0036] Embodiment 1

[0037] As Figure 1 shown in Figures a and b in, for the insulating support 5 of the circuit breaker 2, one end is connected to the circuit breaker 2 and the other end is connected to the bottom of the box body 1. The insulating support 5 mainly has two functions. One is to support the circuit breaker 2; the other is to insulate between the circuit breaker 2 and the ground. During the operation of the generator circuit breaker 2, the circuit breaker 2 is at high voltage and the box body 1 is grounded. The insulating support 5 is used to firmly support and fix the circuit breaker 2.

[0038] The capacitor 3 installed in the circuit breaker 2 of the generator is connected in parallel in the main circuit. One end is connected to the main circuit at high voltage and the other end is grounded. Its working condition is similar to that of the insulating support 5. Therefore, it is considered to integrate the functions of the capacitor 3 and the insulating support 5 so that the capacitor 3 can play the role of the insulating support 5.

[0039] As Figure 3 shown in Figures a and b in, the original insulating support 5 part is removed and the capacitor 3 is installed below the circuit breaker 2.

[0040] Specifically as Figure 4As shown in the figure, metal flanges 31 are provided at both ends of the capacitor 3. There are threaded holes on the metal flanges 31, and the outer shell of the capacitor 3 is made of insulating material. The metal flange 31 on the upper part of the capacitor 3 and the support frame 4 at the bottom of the circuit breaker 2 are connected by bolts. The metal flange 31 on the lower part of the capacitor 3 is fixedly connected to the bottom plate of the box body 1 by bolts. In this way, the capacitor 3 is fixed below the circuit breaker 2, reducing the height of the entire box body 1. At the same time, the capacitor 3 is fixedly connected between the bottom plate of the box body 1 and the circuit breaker 2, with stable installation. During the closing and opening processes of the generator circuit breaker 2, there will be no large vibration, improving the reliability of the installation of the capacitor 3.

[0041] Embodiment 2

[0042] As Figure 2 shown in the figure, the rotating shaft 6 is an important component of the generator circuit breaker 2. During the closing and opening processes of the generator circuit breaker 2, the transmission connecting rod is connected to one end of the rotating shaft 6 through a kinematic pair, driving the rotating shaft 6 to rotate; the other end of the rotating shaft 6 is connected to the moving contact of the circuit breaker 2 through a kinematic pair. When the rotating shaft 6 rotates, it drives the moving contact to move through the kinematic pair, realizing the closing and opening of the generator circuit breaker 2. During operation, the moving contact of the circuit breaker 2 belongs to the high-voltage side, and the transmission system belongs to the low-voltage side. Therefore, during operation, one end of the rotating shaft 6 is also at high voltage and the other end is at low voltage.

[0043] Inside the generator circuit breaker 2, the rotating shaft 6 mainly has two functions. One is to transmit torque. Through the cooperation of kinematic pairs, the movement of the transmission connecting rod is converted into the movement of the moving contact of the circuit breaker 2. The other is to provide insulation. During the operation of the circuit breaker 2, the two ends of the rotating shaft 6 bear different voltages. The end connected to the moving contact of the circuit breaker 2 bears high voltage, and the end connected to the transmission connecting rod bears low voltage. In order to achieve insulation between the contact of the circuit breaker 2 and the operating mechanism and its transmission connecting rod, and prevent short circuit to the ground, the rotating shaft 6 needs to have a certain insulation strength.

[0044] Since the electrical working conditions of the rotating shaft 6 and the capacitor 3 are similar, and the inside of the rotating shaft 6 is hollow, it is considered to install the capacitor 3 inside the rotating shaft 6, thereby reducing the height of the box body 1 and improving the firmness of the installation of the capacitor 3. Its structure is as Figure 6 shown in the figure.

[0045] The specific structure is as Figure 5 shown in the figure. The two ends of the rotating shaft 6 are metal joints 63. One end of the metal joint 63 is connected to the contact drive of the circuit breaker 2 through a kinematic pair, and the other end of the metal joint 63 is connected to the transmission system of the operating mechanism through a kinematic pair. The metal joint 63 is fixedly connected to other parts of the transmission system.

[0046] The middle of the rotating shaft 6 is a hollow cylindrical insulating material. At both ends inside the hollow, a spring 61 is installed respectively, and both springs 61 are in a compressed state. Between the two springs 61, a capacitor column 62 composed of several capacitors 3 connected in series is filled. Due to the action of the force of the springs 61, the capacitors 3 are tightly combined together and firmly fixed inside the rotating shaft 6.

[0047] Comparing the layout structure of the capacitor 3 on the rotating shaft 6 with the existing layout structure of the rotating shaft 6, on the one hand, since the capacitor 3 is installed inside the rotating shaft 6, the height of the box body 1 can be considered to be reduced, reducing the occupied space of the product. On the other hand, both ends of the capacitor 3 are respectively connected to the compressed springs 61, and it can be reliably fixed inside the rotating shaft 6, solving the problem that the capacitor 3 is not firmly installed above the box body 1.

[0048] Embodiment 3

[0049] As Figure 7 shown, the technical solutions of Embodiment 1 and Embodiment 2 are combined. Specifically: the capacitor 3 is installed below the circuit breaker 2 and integrated with the insulating support 5, and the capacitor 3 is arranged inside the rotating shaft 6 of the generator circuit breaker 2.

[0050] The present utility model also discloses a generator containing the capacitor 3 layout structure of the above three embodiments, and thus also has the same functions as the capacitor 3 layout structure.

[0051] In summary, by fixing the capacitor 3 below the circuit breaker 2 or in the rotating shaft 6 in the above manner, the capacitor 3 is no longer arranged above the box body 1, reducing the height of the entire box body 1. At the same time, during the closing and opening processes of the generator circuit breaker 2, no large vibration will occur, improving the reliability of the installation of the capacitor 3.

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: still modifications or equivalent replacements can be made to the specific implementation manners of the present utility model, and any modification or equivalent replacement without departing from the spirit and scope of the present utility model shall be covered within the protection scope of the claims of the present utility model.

Claims

1. A capacitor arrangement structure for a generator circuit breaker, characterized in that, It includes a box body (1), in which a circuit breaker (2) and a capacitor (3) are provided; The capacitor (3) is installed below the circuit breaker (2); The upper part of the capacitor (3) is connected to the bottom of the circuit breaker (2); the lower part of the capacitor (3) is fixedly connected to the box body (1); The upper part of the capacitor (3) is fixedly connected to the support frame (4) at the bottom of the circuit breaker (2); the lower part of the capacitor (3) is fixedly connected to the bottom plate of the box body (1); Metal flanges (31) are provided at both ends of the capacitor (3); the metal flange (31) at the upper part of the capacitor (3) is bolted to the support frame (4), and the metal flange (31) at the lower part of the capacitor (3) is bolted to the bottom plate of the box body (1).

2. The capacitor arrangement structure for a generator circuit breaker according to claim 1, wherein Threaded holes are prefabricated on the metal flange (31).

3. A capacitor arrangement structure for a generator circuit breaker according to claim 1, characterized in that, A moving contact is provided in the circuit breaker (2), and the moving contact is connected to a rotating shaft (6); The rotating shaft (6) includes an intermediate cylinder and metal joints (63) connected to both ends of the intermediate cylinder. Springs (61) are respectively installed at both ends inside the intermediate cylinder, and the springs (61) are in a compressed state in the initial state; A capacitor column (62) is installed between the two springs (61), and the capacitor column (62) is formed by connecting a plurality of capacitors (3) in series.

4. A capacitor arrangement structure for a generator circuit breaker according to claim 3, characterized in that, One end metal joint (63) of the rotating shaft (6) is connected to the moving contact through a kinematic pair, and the other end metal joint (63) is connected to the operating mechanism transmission system through a kinematic pair.

5. The capacitor arrangement structure for a generator circuit breaker according to claim 3, characterized in that, The intermediate cylinder is made of insulating material.

6. A generator, characterized in that, The generator contains the capacitor arrangement structure for the generator circuit breaker described in any one of claims 1-5.

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