Arc extinguishing mechanism of three-phase load isolation switch

Abstract

The utility model relates to an arc extinguishing mechanism of a three-phase load isolation switch, comprising an arc extinguishing chamber, the arc extinguishing chamber comprises a left arc extinguishing plate and a right arc extinguishing plate which are fixedly connected, and an arc extinguishing space is arranged between the left arc extinguishing plate and the right arc extinguishing plate; one end of the arc extinguishing contact knife is connected to the conducting rod support, and the arc extinguishing contact knife rotationally enters the arc extinguishing space; the arc extinguish chamber mounting plate is electrically connected with the wire inlet contact and is fixedly connected with the arc extinguish chamber; the arc extinguishing contact is electrically connected with the arc extinguishing chamber mounting plate, extends into the arc extinguishing space and is positioned on a rotating path of the arc extinguishing contact knife; the left arc extinguishing plate or the right arc extinguishing plate is provided with a through hole for the arc extinguishing contact to pass through. The beneficial effects of the utility model are that the electric arc enters the arc extinguishing chamber to be extinguished, so that the arc extinguishing can be effectively carried out.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to an arc-extinguishing mechanism for a three-phase load disconnecting switch. Background Technology

[0002] A disconnecting switch is a device primarily used for isolating power sources, switching operations, and connecting and disconnecting small-current circuits. When in the open position, the contacts of a disconnecting switch have an insulation distance that meets specified requirements and a clear disconnection mark. When in the closed position, it can carry current under normal circuit conditions and current under abnormal conditions (such as short circuits) for a specified time. It is generally used as a high-voltage disconnecting switch, i.e., a disconnecting switch with a rated voltage of 1kV or higher. While its working principle and structure are relatively simple, its widespread use and high reliability requirements significantly impact the design, construction, and safe operation of substations and power plants.

[0003] Chinese patent CN213546191U discloses a high-voltage disconnecting switch, including a disconnecting switch, a steel bracket, a transmission part, an operating mechanism, and a phase-to-phase connection joint. The operating mechanism is installed on one side of the steel bracket, the disconnecting switch is installed on the top of the steel bracket, the transmission part is disposed between the operating mechanism and the disconnecting switch, and the disconnecting switch consists of three single-pole switches. Each single-pole switch consists of a conductive part, a base frame part, a pull rod insulator, and two support insulators. The base frame part is fixed to the top of the steel bracket, the support insulators are disposed between the conductive part and the base frame part, the conductive part is disposed on top of the support insulators, and the pull rod insulator is disposed between the two support insulators. The upper and lower ends are respectively connected to a conductive linkage bracket and a linkage crank arm.

[0004] The disconnecting switch in the aforementioned patent does not have an arc-extinguishing function. Therefore, an electric arc will be generated when the switch is opened or closed. If the arc cannot be extinguished in time, it may cause contact erosion, equipment damage, or even fire, posing a certain safety hazard. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an arc extinguishing mechanism for a three-phase load disconnect switch to solve the above problems.

[0006] The technical solution of this utility model is implemented as follows: an arc-extinguishing mechanism for a three-phase load disconnector includes a conductive rod connected to the outgoing contact, a conductive clamp connected to the incoming contact, a conductive rod support for driving the conductive rod to rotate, and further includes:

[0007] An arc-extinguishing chamber, comprising a left arc-extinguishing plate and a right arc-extinguishing plate fixedly connected thereto, with an arc-extinguishing space provided between the left and right arc-extinguishing plates;

[0008] An arc-extinguishing contact blade, one end of which is connected to a conductive rod support, and the arc-extinguishing contact blade rotates into the arc-extinguishing space;

[0009] An arc-extinguishing chamber mounting plate, which is electrically connected to the incoming line contact and fixedly connected to the arc-extinguishing chamber;

[0010] An arc-extinguishing contact is electrically connected to the arc-extinguishing chamber mounting plate and extends into the arc-extinguishing space and is located on the rotation path of the arc-extinguishing contact blade.

[0011] The left or right arc-extinguishing plate is provided with a through hole for the arc-extinguishing contact to pass through.

[0012] By adopting the above technical solution, when the circuit is opened or closed, an electric arc will be generated between the conductive rod and the conductive clamp. Then, guided by the arc-extinguishing contact knife and the arc-extinguishing contact head, the electric arc will enter the arc-extinguishing chamber and be extinguished, thereby effectively extinguishing the arc.

[0013] This utility model is further configured to include:

[0014] An arc-extinguishing spring is provided, the lower end of which is electrically connected to the arc-extinguishing chamber mounting plate by bolts and fixed to the outer wall of the arc-extinguishing chamber. The upper end of the arc-extinguishing spring is provided with a snap-fit ​​hole for the arc-extinguishing contact to be snapped into place. The arc-extinguishing spring is made of conductive elastic metal material.

[0015] By adopting the above technical solution, the arc-extinguishing spring can effectively guide the arc into the arc-extinguishing space. When the circuit is opened, the conductive rod and the conductive clamp separate first. At this time, the arc is generated between the arc-extinguishing contact blade and the arc-extinguishing contact. Then, as the conductive rod swings upward, the arc-extinguishing contact blade quickly hits the arc-extinguishing contact, pushing the arc-extinguishing contact out of the arc-extinguishing space. At the same time, the arc-extinguishing spring bends outward. When the arc-extinguishing contact blade reaches above the arc-extinguishing contact, the arc-extinguishing spring drives the arc-extinguishing contact to reset and enter the arc-extinguishing space.

[0016] The present invention is further configured such that: a groove for mounting and embedding the arc-extinguishing spring is provided on the outer wall of the arc-extinguishing chamber, and the through hole is provided at the bottom of the groove.

[0017] By adopting the above technical solution, the installation of the arc-extinguishing shrapnel on the arc-extinguishing chamber can be made more stable.

[0018] The present invention is further configured such that one end of the arc-extinguishing contact extending into the arc-extinguishing space is provided as an inclined surface.

[0019] By adopting the above technical solution, the arc-extinguishing contact blade will move along the inclined plane below the arc-extinguishing contact when closing the circuit.

[0020] The present invention is further configured such that the upper ends of the left and right arc-extinguishing plates are inclined outward and have inlet ports.

[0021] By adopting the above technical solution, the arc-extinguishing contact blade can enter the arc-extinguishing chamber more easily.

[0022] This utility model is further configured to include:

[0023] A rotating shaft is mounted on a conductive rod support;

[0024] A torsion spring is sleeved on a rotating shaft. One end of the torsion spring is connected to the conductive rod support, and the other end is connected to the upper side of the arc-extinguishing contact knife.

[0025] The arc-extinguishing contact blade is rotatably connected to the conductive rod support via a rotating shaft.

[0026] By adopting the above technical solution, the resetting effect of the arc-extinguishing contact blade is improved.

[0027] The present invention is further configured such that: the arc extinguishing space is provided with spaces for placing the arc extinguishing contact blade both above and below the arc extinguishing contact.

[0028] By adopting the above technical solution, there is a certain distance between the arc-extinguishing contact knife and the arc-extinguishing contact when the circuit is in the opening and closing state, thereby avoiding electrical connection between the arc-extinguishing contact knife and the arc-extinguishing contact. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the structure of a specific embodiment of the present utility model. Figure 2 ;

[0032] Figure 3 This is a structural cross-sectional view of a specific embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of the internal structure of a specific embodiment of the present utility model. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] like Figures 1-4 As shown, this utility model discloses an arc-extinguishing mechanism for a three-phase load disconnector, including a conductive rod 57 connected to the outgoing contact 55, a conductive clamp 561 connected to the incoming contact 56, a conductive rod support 571 for driving the conductive rod 57 to rotate, and further including:

[0036] An arc-extinguishing chamber 580 includes a left arc-extinguishing plate 5800 and a right arc-extinguishing plate 5801 fixedly connected, and an arc-extinguishing space 5802 is provided between the left arc-extinguishing plate 5800 and the right arc-extinguishing plate 5801.

[0037] Arc-extinguishing contact 581, one end of which is connected to conductive rod support 571, and the arc-extinguishing contact 581 rotates into the arc-extinguishing space 5802;

[0038] Arc-extinguishing chamber mounting plate 582, which is electrically connected to the incoming contact 56 and fixedly connected to the arc-extinguishing chamber 580;

[0039] Arc extinguishing contact 583 is electrically connected to arc extinguishing chamber mounting plate 582 and extends into arc extinguishing space 5802 and is located on the rotation path of arc extinguishing contact blade 581;

[0040] The left arc-extinguishing plate 5800 or the right arc-extinguishing plate 5801 is provided with a through hole 5803 for the arc-extinguishing contact 583 to pass through.

[0041] By adopting the above technical solution, when the circuit is opened or closed, an electric arc will be generated between the conductive rod 57 and the conductive clamp 561. Then, guided by the arc extinguishing contact 581 and the arc extinguishing contact 583, the electric arc will enter the arc extinguishing chamber 580 and be extinguished, thereby effectively extinguishing the arc.

[0042] In this embodiment of the utility model, it further includes:

[0043] The arc-extinguishing spring 584 has its lower end electrically connected to the arc-extinguishing chamber mounting plate 582 via bolts and fixed to the outer wall of the arc-extinguishing chamber 580. The upper end of the arc-extinguishing spring 584 has a snap-fit ​​hole 5840 for the arc-extinguishing contact 583 to be snapped into place. The arc-extinguishing spring 584 is made of conductive elastic metal material.

[0044] By adopting the above technical solution, the arc-extinguishing spring 584 can effectively guide the arc into the arc-extinguishing space 5802. When the circuit is opened, the conductive rod 57 and the conductive clamp 561 separate first. At this time, the arc is generated between the arc-extinguishing contact 581 and the arc-extinguishing contact 583. Then, as the conductive rod 57 swings upward, the arc-extinguishing contact 581 quickly strikes the arc-extinguishing contact 583, pushing the arc-extinguishing contact 583 out of the arc-extinguishing space 5802. At the same time, the arc-extinguishing spring 584 bends outward. When the arc-extinguishing contact 581 reaches above the arc-extinguishing contact 583, the arc-extinguishing spring 584 drives the arc-extinguishing contact 583 to reset and enter the arc-extinguishing space 5802.

[0045] In this embodiment of the utility model, a groove 5804 for mounting and embedding the arc-extinguishing spring 584 is provided on the outer wall of the arc-extinguishing chamber 580, and the through hole 5803 is provided at the bottom of the groove 5804.

[0046] By adopting the above technical solution, the installation of the arc-extinguishing shrapnel 584 on the arc-extinguishing chamber 580 can be made more stable.

[0047] In this embodiment of the invention, one end of the arc-extinguishing contact 583 that extends into the arc-extinguishing space 5802 is provided as an inclined surface.

[0048] By adopting the above technical solution, the arc-extinguishing contact 581 will move along the inclined plane below the arc-extinguishing contact 583 when closing the circuit.

[0049] In this embodiment of the utility model, the upper ends of the left arc-extinguishing plate 5800 and the right arc-extinguishing plate 5801 are provided with inlet ports 5805 that are inclined outward.

[0050] By adopting the above technical solution, the arc-extinguishing contact 581 can enter the arc-extinguishing chamber 580 more easily.

[0051] In this embodiment of the utility model, it further includes:

[0052] Rotating shaft 5710, the rotating shaft 5710 is mounted on conductive rod support 571;

[0053] Torsion spring 585 is sleeved on rotating shaft 5710. One end of torsion spring 585 is connected to conductive rod support 571, and the other end is connected to the upper side of arc extinguishing contact knife 581.

[0054] The arc-extinguishing contact 581 is rotatably connected to the conductive rod support 571 via a rotating shaft 5710.

[0055] By adopting the above technical solution, the reset effect of the arc-extinguishing contact 581 is improved.

[0056] In this embodiment of the utility model, the arc extinguishing space 5802 has spaces above and below the arc extinguishing contact 583 for placing the arc extinguishing contact blade 581.

[0057] By adopting the above technical solution, there is a certain distance between the arc-extinguishing contact 581 and the arc-extinguishing contact 583 when they are in the opening and closing state, thereby avoiding electrical connection between the arc-extinguishing contact 581 and the arc-extinguishing contact 583.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An arc-extinguishing mechanism for a three-phase load disconnector, comprising a conductive rod (57) connected to an outgoing contact (55), a conductive clamp (561) connected to an incoming contact (56), and a conductive rod support (571) for driving the conductive rod (57) to rotate, characterized in that, Also includes: An arc-extinguishing chamber (580) includes a left arc-extinguishing plate (5800) and a right arc-extinguishing plate (5801) fixedly connected, and an arc-extinguishing space (5802) is provided between the left arc-extinguishing plate (5800) and the right arc-extinguishing plate (5801); Arc-extinguishing contact (581), one end of which is connected to the conductive rod support (571), and the arc-extinguishing contact (581) rotates into the arc-extinguishing space (5802); Arc-extinguishing chamber mounting plate (582), which is electrically connected to the incoming contact (56) and fixedly connected to the arc-extinguishing chamber (580); Arc extinguishing contact (583), which is electrically connected to the arc extinguishing chamber mounting plate (582) and extends into the arc extinguishing space (5802) and is located on the rotation path of the arc extinguishing contact blade (581); The left arc-extinguishing plate (5800) or the right arc-extinguishing plate (5801) is provided with a through hole (5803) for the arc-extinguishing contact (583) to pass through.

2. The arc-extinguishing mechanism of a three-phase load disconnector according to claim 1, characterized in that, Also includes: An arc-extinguishing spring (584) is provided. The lower end of the arc-extinguishing spring (584) is electrically connected to the arc-extinguishing chamber mounting plate (582) by bolts and fixed on the outer wall of the arc-extinguishing chamber (580). The upper end of the arc-extinguishing spring (584) is provided with a snap-fit ​​hole (5840) for the arc-extinguishing contact (583) to be snapped into place. The arc-extinguishing spring (584) is made of conductive elastic metal material.

3. The arc-extinguishing mechanism of a three-phase load disconnector according to claim 2, characterized in that, The outer wall of the arc-extinguishing chamber (580) is provided with a groove (5804) for mounting and embedding the arc-extinguishing spring (584), and the through hole (5803) is opened at the bottom of the groove (5804).

4. The arc-extinguishing mechanism of a three-phase load disconnector according to claim 1, characterized in that, The end of the arc-extinguishing contact (583) that extends into the arc-extinguishing space (5802) is set as an inclined surface.

5. The arc-extinguishing mechanism of a three-phase load disconnector according to claim 1, characterized in that, The upper ends of the left arc-extinguishing plate (5800) and the right arc-extinguishing plate (5801) are provided with inlet ports (5805) that are inclined outward.

6. The arc-extinguishing mechanism of a three-phase load disconnector according to claim 1, characterized in that, Also includes: A rotating shaft (5710) is mounted on a conductive rod support (571); Torsion spring (585), the torsion spring (585) is sleeved on the rotating shaft (5710), one end of the torsion spring (585) is connected to the conductive rod support (571), and the other end is connected to the upper side of the arc extinguishing contact knife (581); The arc-extinguishing contact blade (581) is rotatably connected to the conductive rod support (571) via a rotating shaft (5710).

7. The arc-extinguishing mechanism of a three-phase load disconnector according to claim 1, characterized in that, The arc extinguishing space (5802) has spaces above and below the arc extinguishing contact (583) for placing the arc extinguishing contact blade (581).

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