An arc extinguishing chamber for a photovoltaic direct current special circuit breaker

Abstract

The utility model relates to the field of arc extinguishing chamber, specifically is a kind of arc extinguishing chamber of photovoltaic direct current special circuit breaker, including insulating shell, the top of insulating shell is provided with static end conducting block, the bottom fixedly connected with static contact of static end conducting block, the inner wall sliding communication of insulating shell has dynamic contact, the bottom fixedly connected with dynamic end conducting block of dynamic contact, the surface of dynamic contact is provided with detection mechanism, detection mechanism includes fixed block, fixed block is fixedly connected in the inner wall of insulating shell, the inner wall fixedly connected with pressure sensor of fixed block, the utility model can detect the pressure released when dynamic contact moves at any time by detection mechanism, reach the effect that user judges the opening and closing speed of dynamic contact and static contact, solve the situation that dynamic end conducting block in arc extinguishing chamber interior leads to fatigue or deformation in long-term operation, to affect contact split action speed, and then affect the problem of arc extinguishing effect.

Description

Technical Field

[0001] This utility model relates to the field of arc-extinguishing chambers, specifically an arc-extinguishing chamber for a photovoltaic DC circuit breaker. Background Technology

[0002] Vacuum interrupter, also known as vacuum switch tube, is a core component of medium and high voltage power switches. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off by using the excellent insulation of the vacuum inside the tube.

[0003] One issue is that the moving end conductive block inside the arc-extinguishing chamber may become fatigued or deformed during long-term operation, which affects the contact opening and closing speed and thus the arc-extinguishing effect. Utility Model Content

[0004] To address the shortcomings of existing technologies, such as the fatigue or deformation of the moving-end conductive block inside the arc-extinguishing chamber due to long-term operation, which affects the contact opening and closing speed and thus the arc-extinguishing effect, this utility model proposes an arc-extinguishing chamber for a photovoltaic DC circuit breaker.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an arc-extinguishing chamber of a photovoltaic DC circuit breaker, including an insulating shell, a stationary conductive block is provided on the top of the insulating shell, a static contact is fixedly connected to the bottom of the stationary conductive block, a dynamic contact is slidably connected to the inner wall of the insulating shell, a moving conductive block is fixedly connected to the bottom of the dynamic contact, and a detection mechanism is provided on the surface of the dynamic contact.

[0006] The detection mechanism includes a fixing block, which is fixedly connected to the inner wall of the insulating shell. A pressure sensor is fixedly connected to the inner wall of the fixing block. A support rod is fixedly connected to the bottom of the fixing block. A fixing ring is fixedly connected to the dynamic contact. A connecting sleeve is fixedly connected to the inner wall of the fixing ring. A spring is fixedly connected to the top of the connecting sleeve. A pressure ring is fixedly connected to the top of the spring.

[0007] Preferably, a temperature-conducting ring is fixedly connected to the surface of the stationary conductive block, and a temperature-conducting plate is fixedly connected to the surface of the temperature-conducting ring.

[0008] Preferably, an insulating ring is fixedly connected to the top of the insulating shell, and the insulating ring is slidably connected to the stationary conductive block.

[0009] Preferably, a support frame is fixedly connected to the bottom of the insulating shell, and the surface of the moving end conductive block is slidably connected to the inner wall of the support frame.

[0010] Preferably, an anti-collision ring is fixedly connected to the bottom of the support frame, and a protective ring is fixedly connected to the surface of the moving end conductive block.

[0011] Preferably, a bellows is fixedly connected to the inner cavity of the insulating shell, and the inner wall of the bellows is slidably connected to the surface of the dynamic contact.

[0012] Preferably, the surface of the static contact is fixedly connected with a shielding cylinder, and the number of shielding cylinders is two.

[0013] The advantages of this utility model are:

[0014] This invention enables the detection mechanism to constantly monitor the pressure released by the dynamic contact during movement, allowing users to easily judge the opening and closing speeds of the dynamic and static contacts. It also solves the problem that the moving conductive block inside the arc extinguishing chamber suffers fatigue or deformation due to long-term operation, which affects the contact opening and closing speed and thus the arc extinguishing effect. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a first-view structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This utility model Figure 2 Schematic diagram of the structure at point A;

[0019] Figure 4 This utility model Figure 2 Schematic diagram of the structure at point B;

[0020] Figure 5 This is a schematic diagram of the second-view structure of the present invention.

[0021] In the diagram: 1. Insulating shell; 2. Temperature-conducting plate; 3. Temperature-conducting ring; 4. Stationary conductive block; 5. Isolation ring; 6. Support frame; 7. Moving conductive block; 8. Detection mechanism; 801. Fixing block; 802. Pressure sensor; 803. Pressure ring; 804. Spring; 805. Support rod; 806. Fixing ring; 807. Connecting sleeve; 9. Anti-collision ring; 10. Protective ring; 11. Static contact; 12. Shielding cylinder; 13. Bellows; 14. Dynamic contact. Detailed Implementation

[0022] 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 scope of protection of the present utility model.

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This application discloses an arc-extinguishing chamber for a photovoltaic DC dedicated circuit breaker. (Refer to...) Figures 1-5 An arc-extinguishing chamber for a photovoltaic DC circuit breaker includes an insulating shell 1. A stationary conductive block 4 is disposed on the top of the insulating shell 1, and a static contact 11 is fixedly connected to the bottom of the stationary conductive block 4. A dynamic contact 14 is slidably connected to the inner wall of the insulating shell 1, and a moving conductive block 7 is fixedly connected to the bottom of the dynamic contact 14. A detection mechanism 8 is disposed on the surface of the dynamic contact 14. The detection mechanism 8 includes a fixing block 801, which is fixedly connected to the inner wall of the insulating shell 1. A pressure sensor 802 is fixedly connected to the inner wall of the fixing block 801. A support rod 805 is fixedly connected to the bottom of the fixing block 801. A fixing ring 806 is fixedly connected to the dynamic contact 14. A connecting sleeve 807 is fixedly connected to the inner wall of 6. A spring 804 is fixedly connected to the top of the connecting sleeve 807. A pressure ring 803 is fixedly connected to the top of the spring 804. When the dynamic contact 14 and the static contact 11 are in contact with each other, the connecting sleeve 807 is in a state of applying pressure to one of the pressure sensors 802. When the dynamic contact 14 is not in contact with the static contact 11, the connecting sleeve 807 will apply pressure to the other pressure sensor 802. When it is necessary to test the opening and closing speed of the dynamic contact 14 and the static contact 11, the opening and closing speed of the static contact 11 and the dynamic contact 14 inside the insulating shell 1 can be understood by observing the pressure change of the two pressure sensors 802.

[0025] Reference Figure 1 A temperature-conducting ring 3 is fixedly connected to the surface of the static end conductive block 4, and a temperature-conducting plate 2 is fixedly connected to the surface of the temperature-conducting ring 3. By connecting the temperature-conducting plate 2 to an external heat dissipation device, the heat transferred by the static contact 11 can be removed by the external heat dissipation device, thereby improving the cooling efficiency of the static contact 11 and the dynamic contact 14.

[0026] Reference Figure 1 An insulating ring 5 is fixedly connected to the top of the insulating shell 1. The insulating ring 5 is slidably connected to the stationary conductive block 4. By isolating the edge of the stationary conductive block 4, leakage of current on the surface of the stationary conductive block 4 is prevented.

[0027] Reference Figure 1A support frame 6 is fixedly connected to the bottom of the insulating shell 1. The surface of the moving end conductive block 7 is slidably connected to the inner wall of the support frame 6. The support frame 6 installed at the bottom of the insulating shell 1 can support the moving end conductive block 7 to slide stably at the bottom of the insulating shell 1 and restrict the movement of the dynamic contact 14.

[0028] Reference Figure 1 The bottom of the support frame 6 is fixedly connected to an anti-collision ring 9, and the surface of the moving end conductive block 7 is fixedly connected to a protective ring 10. When the moving end conductive block 7 drives the dynamic contact 14 and the static contact 11 to fit together, the anti-collision ring 9 buffers the impact force of the moving end conductive block 7 by limiting the protective ring 10.

[0029] Reference Figure 2 A bellows 13 is fixedly connected to the inner cavity of the insulating shell 1. The inner wall of the bellows 13 is slidably connected to the surface of the dynamic contact 14. The bellows 13 installed in the insulating shell 1 enables the dynamic contact 14 to reciprocate in a vacuum environment.

[0030] Reference Figure 2 A shielding cylinder 12 is fixedly connected to the surface of the static contact 11. There are two shielding cylinders 12. The shielding cylinders 12 installed on the static contact 11 can distribute the electric field evenly and prevent the electric field from concentrating.

[0031] Working principle: When the insulating shell 1 is used for a long time, the static contact 11 and dynamic contact 14 inside can be tested. When the dynamic contact 14 and the static contact 11 are in contact with each other, the connecting sleeve 807 is in a state of applying pressure to one of the pressure sensors 802. When the moving end conductive block 7 drives the dynamic contact 14 to move downward and does not contact the static contact 11, the connecting sleeve 807 will apply pressure to the other pressure sensor 802. By observing the pressure change rate of the two pressure sensors 802, the opening and closing speed of the static contact 11 and dynamic contact 14 inside the insulating shell 1 can be understood, and it can be judged whether there is jamming or deformation of the static contact 11 and dynamic contact 14 during the opening and closing process.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An arc-extinguishing chamber for a photovoltaic DC circuit breaker, comprising an insulating outer shell (1), characterized in that: The top of the insulating shell (1) is provided with a stationary conductive block (4), the bottom of the stationary conductive block (4) is fixedly connected with a static contact (11), the inner wall of the insulating shell (1) is slidably connected with a dynamic contact (14), the bottom of the dynamic contact (14) is fixedly connected with a moving conductive block (7), and the surface of the dynamic contact (14) is provided with a detection mechanism (8). The detection mechanism (8) includes a fixing block (801), which is fixedly connected to the inner wall of the insulating shell (1). A pressure sensor (802) is fixedly connected to the inner wall of the fixing block (801). A support rod (805) is fixedly connected to the bottom of the fixing block (801). A fixing ring (806) is fixedly connected to the dynamic contact (14). A connecting sleeve (807) is fixedly connected to the inner wall of the fixing ring (806). A spring (804) is fixedly connected to the top of the connecting sleeve (807). A pressure ring (803) is fixedly connected to the top of the spring (804).

2. The arc-extinguishing chamber of a photovoltaic DC dedicated circuit breaker according to claim 1, characterized in that: A temperature-conducting ring (3) is fixedly connected to the surface of the stationary conductive block (4), and a temperature-conducting plate (2) is fixedly connected to the surface of the temperature-conducting ring (3).

3. The arc-extinguishing chamber of a photovoltaic DC dedicated circuit breaker according to claim 1, characterized in that: An insulating ring (5) is fixedly connected to the top of the insulating shell (1), and the insulating ring (5) is slidably connected to the stationary conductive block (4).

4. The arc-extinguishing chamber of a photovoltaic DC dedicated circuit breaker according to claim 1, characterized in that: The bottom of the insulating shell (1) is fixedly connected to a support frame (6), and the surface of the moving end conductive block (7) is slidably connected to the inner wall of the support frame (6).

5. The arc-extinguishing chamber of a photovoltaic DC dedicated circuit breaker according to claim 4, characterized in that: The bottom of the support frame (6) is fixedly connected to an anti-collision ring (9), and the surface of the moving end conductive block (7) is fixedly connected to a protective ring (10).

6. The arc-extinguishing chamber of a photovoltaic DC dedicated circuit breaker according to claim 1, characterized in that: A bellows (13) is fixedly connected to the inner cavity of the insulating shell (1), and the inner wall of the bellows (13) is slidably connected to the surface of the dynamic contact (14).

7. The arc-extinguishing chamber of a photovoltaic DC dedicated circuit breaker according to claim 1, characterized in that: The surface of the static contact (11) is fixedly connected with a shielding cylinder (12), and there are two shielding cylinders (12).

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