Modularized primary and secondary fusion pole-mounted circuit breaker contact arc extinguishing device

Abstract

The utility model relates to the technical field of electrical equipment, and discloses a modularized primary and secondary fusion pole-mounted circuit breaker contact arc extinguishing device, which comprises a porcelain shell, a static cover plate fixedly mounted at the lower end of the porcelain shell, a movable cover plate fixedly mounted at the upper end of the porcelain shell, and a first contact and a second contact respectively arranged in the porcelain shell, a static conducting rod is fixedly installed at the lower end of the first contact, one end, away from the first contact, of the static conducting rod penetrates through the static cover plate and extends to the position below the static cover plate, and a movable conducting rod is fixedly installed at the upper end of the second contact. An outer side seat is arranged on the outer side of the porcelain shell, a connecting seat and a vertical cover are arranged on the outer side seat, a flexible sliding rod is installed between the outer side seat and the connecting seat in a penetrating mode, and a sealing ball is installed at one end of the flexible sliding rod and installed in the displacement hole in a penetrating mode. The second corrugated pipe, the top plate, the top rod and the pressure sensor are matched to change the receiving pressure of the pressure sensor according to the change of the air pressure in the porcelain shell, so that whether the gas in the porcelain shell leaks or not is monitored.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a modular primary and secondary integrated pole-mounted circuit breaker contact arc extinguishing device. Background Technology

[0002] The arc-extinguishing chamber of a primary and secondary integrated pole-mounted circuit breaker is a key component used to extinguish electric arcs. Its arc-extinguishing method is often vacuum arc extinguishing. The inside of the arc-extinguishing chamber is a high vacuum environment. When the moving and stationary contacts of the circuit breaker are energized and opened under the action of the operating mechanism, a vacuum arc will be generated between the contacts. At the same time, due to the special structure of the contacts, an appropriate longitudinal magnetic field will be generated, which will cause the vacuum arc to remain diffuse and evenly distributed on the contact surface to burn, maintaining a low arc voltage.

[0003] However, during long-term operation of the arc-extinguishing chamber, gas leakage may occur due to factors such as seal aging and mechanical vibration. Once leakage occurs, the vacuum level in the arc-extinguishing chamber will decrease, the arc-extinguishing performance will be severely affected, and even electrical faults may be triggered, threatening the safe and stable operation of the power distribution network. Traditional arc-extinguishing devices often lack effective gas leakage monitoring methods, making it impossible to detect leakage problems in time and take measures, resulting in untimely equipment maintenance, increased power outage time and maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a modular primary and secondary integrated pole-mounted circuit breaker contact arc extinguishing device, which can effectively monitor gas leakage in the arc extinguishing chamber and effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A modular primary and secondary integrated pole-mounted circuit breaker contact arc extinguishing device includes a porcelain shell. A stationary cover plate is fixedly installed at the lower end of the porcelain shell, and a movable cover plate is fixedly installed at the upper end of the porcelain shell. A first contact and a second contact are respectively arranged inside the porcelain shell. A stationary conductive rod is fixedly installed at the lower end of the first contact. The end of the stationary conductive rod away from the first contact extends through the stationary cover plate to below the stationary cover plate. A movable conductive rod is fixedly installed at the upper end of the second contact. A corrugated pipe shield is fixedly installed at the upper end of the movable conductive rod. A guide sleeve is fixedly installed at the upper end of the corrugated pipe shield. One end of the movable conductive rod extends through the first corrugated pipe and the guide sleeve to above the guide sleeve. An outer seat is fixedly installed on the outside of the porcelain shell. A displacement hole is opened in the outer seat. A connecting seat is movably installed at the upper end of the outer seat. A flexible slide rod is movably connected between the displacement hole and the connecting seat. A sealing ball is movably installed at one end of the flexible slide rod.

[0007] As a further preferred embodiment of this utility model, a sealing ring is fixedly installed on the outer side of the connecting seat, and the connecting seat located below the sealing ring is threadedly connected to the threaded groove inside the displacement hole, and a rod hole is opened in the connecting seat.

[0008] As a further preferred embodiment of this utility model, a vertical cover is fixedly installed on the upper end of the connecting seat, and a pressure sensor is fixedly installed on the upper end of the vertical cover. The pressure sensor is electrically connected to an external main controller through a connecting wire. With the help of the connecting seat, the vertical cover, and the pressure sensor, a basis can be provided for monitoring gas leakage inside the ceramic shell.

[0009] As a further preferred embodiment of this utility model, the upper end of the connecting seat is movably connected to the inside of the upright cover, a top plate is fixedly installed on the second corrugated pipe, and a top rod is fixedly installed at the middle position of the upper end of the top plate. The end of the top rod away from the top plate passes through the upright cover and abuts against the lower end of the pressure sensor.

[0010] As a further preferred embodiment of this utility model, a compression spring is also fitted on the outer side of the second corrugated pipe, and the bottom of the compression spring abuts against the connecting seat, and the top abuts against the top of the inner cover.

[0011] As a further preferred embodiment of this utility model, one end of the flexible slide rod is provided with a positioning groove, and a stud is fixedly installed on the outside of the sealing ball. The sealing ball is threadedly connected to the positioning groove through the stud. One end of the flexible slide rod is inserted into the displacement hole near the shielding cylinder inside the ceramic shell, and the other end of the flexible slide rod passes through the rod hole and abuts against the lower end of the top plate. The arrangement of the flexible slide rod, the sealing ball, the second corrugated pipe, the top plate, and the top rod allows the pressure sensor to receive pressure changes through changes in the air pressure inside the ceramic shell, thereby monitoring the changes in air pressure inside the ceramic shell and detecting whether a leak has occurred.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this invention, an outer seat is provided on the outside of the ceramic shell, and a connecting seat and a vertical cover are provided on the outer seat. A flexible slide rod is interspersed between the outer seat and the connecting seat. A sealing ball is installed at one end of the flexible slide rod and is interspersed in the displacement hole. In conjunction with the second bellows, the top plate, the top rod, and the pressure sensor, the receiving pressure of the pressure sensor can be changed by the change of gas pressure inside the ceramic shell, thereby monitoring whether there is a gas leak inside the ceramic shell. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the main structure of this utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the connector structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the disassembled structure of the flexible slide bar and sealing ball of this utility model.

[0019] In the diagram: 1. Ceramic shell; 2. Static cover plate; 3. Moving cover plate; 4. First contact; 5. Static conductive rod; 6. Second contact; 7. Moving conductive rod; 8. Bellows shield; 9. Guide sleeve; 10. First bellows; 11. Outer seat; 12. Connecting seat; 13. Displacement hole; 14. Flexible slide rod; 15. Sealing ball; 16. Vertical cover; 17. Pressure sensor; 18. Rod hole; 19. Second bellows; 20. Top plate; 21. Top rod; 22. Sealing ring; 23. Positioning groove; 24. Stud. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] like Figures 1-5 As shown, this utility model provides a modular primary and secondary integrated pole-mounted circuit breaker contact arc extinguishing device, including a porcelain shell 1, a stationary cover plate 2 fixedly installed at the lower end of the porcelain shell 1, a movable cover plate 3 fixedly installed at the upper end of the porcelain shell 1, a first contact 4 and a second contact 6 respectively arranged inside the porcelain shell 1, and a stationary conductive rod 5 fixedly installed at the lower end of the first contact 4, with one end of the stationary conductive rod 5 away from the first contact 4 extending through the stationary cover plate 2 to below the stationary cover plate 2, and a movable conductive rod 7 fixedly installed at the upper end of the second contact 6. A corrugated pipe shield 8 is fixedly installed at the upper end of the 7. A guide sleeve 9 is fixedly installed at the upper end of the corrugated pipe shield 8. One end of the movable conductive rod 7 passes through the first corrugated pipe 10 and the guide sleeve 9 in sequence and extends to the top of the guide sleeve 9. An outer seat 11 is fixedly installed on the outer side of the ceramic shell 1. A displacement hole 13 is opened in the outer seat 11. A connecting seat 12 is movably installed at the upper end of the outer seat 11. A flexible slide rod 14 is movably connected between the displacement hole 13 and the connecting seat 12. A sealing ball 15 is movably installed at one end of the flexible slide rod 14.

[0022] like Figures 2-4As shown, a sealing ring 22 is fixedly installed on the outside of the connecting seat 12. The connecting seat 12 located below the sealing ring 22 is threaded into the threaded groove inside the displacement hole 13. A rod hole 18 is opened in the connecting seat 12. A vertical cover 16 is fixedly installed on the upper end of the connecting seat 12. A pressure sensor 17 is fixedly installed on the upper end of the vertical cover 16. The pressure sensor 17 is electrically connected to an external main controller through a connecting wire. With the help of the connecting seat 12, the vertical cover 16, and the pressure sensor 17, a basis can be provided for monitoring gas leakage in the ceramic shell 1. A second bellows 19 is movably connected to the upper end of the connecting seat 12 and inside the vertical cover 16. A top plate 20 is fixedly installed on the second bellows 19. A top rod 21 is fixedly installed at the middle of the upper end of the top plate 20. The end of the top rod 21 away from the top plate 20 passes through the vertical cover 16 and abuts against the lower end of the pressure sensor 17. A compression spring is also fitted on the outside of the second bellows 19. The bottom of the compression spring abuts against the connecting seat 12, and the top abuts against the top inside the vertical cover 16.

[0023] like Figures 2-5 As shown, a positioning groove 23 is provided at one end of the flexible slide rod 14, and a stud 24 is fixedly installed on the outside of the sealing ball 15. The sealing ball 15 is threadedly connected to the positioning groove 23 through the stud 24. One end of the flexible slide rod 14 is inserted into the displacement hole 13 near the shielding cylinder inside the ceramic shell 1. The other end of the flexible slide rod 14 passes through the rod hole 18 and abuts against the lower end of the top plate 20. The arrangement of the flexible slide rod 14, the sealing ball 15, the second bellows 19, the top plate 20, and the top rod 21 can make the pressure sensor 17 receive the pressure change through the air pressure change inside the ceramic shell 1, thereby monitoring the air pressure change inside the ceramic shell 1 and detecting whether there is a leak.

[0024] It should be noted that this utility model is a modular primary and secondary integrated pole-mounted circuit breaker contact arc extinguishing device. When the gas inside the ceramic shell 1 is in a normal state, the sealing ball 15, supported by the flexible slide rod 14, seals the end of the displacement hole 13 near the inner shielding cylinder of the ceramic shell 1. At this time, the compression spring on the outside of the second bellows 19 is in a normal compression state, and applies a certain initial pressure to the pressure sensor 17 through the top plate 20 and the top rod 21. The pressure sensor 17 transmits the pressure signal to the external main controller, and the main controller records the pressure value at this time as a normal reference value. Once gas leakage occurs inside the ceramic shell 1, the internal gas pressure will change. If the gas pressure inside the ceramic shell 1 decreases, the compression spring will push the flexible slide rod 14 to move closer to the ceramic shell 1, the second bellows 19 will extend, and the pressure of the top rod 21 on the pressure sensor 17 will decrease. The pressure sensor 17 transmits the pressure decrease signal to the main controller, and the external main controller judges whether gas leakage has occurred by comparison.

[0025] 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A modular primary and secondary fused pole circuit breaker contact arc mitigation device, characterized by: The device includes a ceramic shell (1), a stationary cover plate (2) fixedly installed at the lower end of the ceramic shell (1), a movable cover plate (3) fixedly installed at the upper end of the ceramic shell (1), a first contact (4) and a second contact (6) respectively provided inside the ceramic shell (1), and a stationary conductive rod (5) fixedly installed at the lower end of the first contact (4), with one end of the stationary conductive rod (5) away from the first contact (4) extending through the stationary cover plate (2) to below the stationary cover plate (2), and a movable conductive rod (7) fixedly installed at the upper end of the second contact (6). A corrugated pipe shield (8) is fixedly installed on the upper end of the conductive rod (7). A guide sleeve (9) is fixedly installed on the upper end of the corrugated pipe shield (8). One end of the moving conductive rod (7) passes through the first corrugated pipe (10) and the guide sleeve (9) in sequence and extends to the top of the guide sleeve (9). An outer seat (11) is fixedly installed on the outside of the ceramic shell (1). A displacement hole (13) is opened in the outer seat (11). A connecting seat (12) is movably installed on the upper end of the outer seat (11). The displacement hole (13) and the connecting seat are connected. A flexible slide rod (14) is movably connected between (12). A sealing ball (15) is movably installed at one end of the flexible slide rod (14). A sealing ring (22) is fixedly installed on the outside of the connecting seat (12). The connecting seat (12) located below the sealing ring (22) is threaded into the threaded groove inside the displacement hole (13). A rod hole (18) is opened in the connecting seat (12). A vertical cover (16) is fixedly installed on the upper end of the connecting seat (12). A pressure sensor is fixedly installed on the upper end of the vertical cover (16). (17), and the pressure sensor (17) is electrically connected to the external main controller through the connecting line. The upper end of the connecting seat (12) is movably connected to the inside of the upright cover (16) with a second corrugated pipe (19). A top plate (20) is fixedly installed on the second corrugated pipe (19). A top rod (21) is fixedly installed at the middle position of the upper end of the top plate (20). A compression spring is also fitted on the outside of the second corrugated pipe (19). The bottom of the compression spring abuts against the connecting seat (12), and the top abuts against the top inside the upright cover (16).

2. The modular primary and secondary fused pole circuit breaker contact arc extinguishing device of claim 1, wherein: The end of the top rod (21) away from the top plate (20) passes through the cover (16) and abuts against the lower end of the pressure sensor (17).

3. The modular primary and secondary integrated pole-mounted circuit breaker contact arc extinguishing device according to claim 2, characterized in that: The flexible slide rod (14) has a positioning groove (23) at one end. A stud (24) is fixedly installed on the outside of the sealing ball (15). The sealing ball (15) is threadedly connected to the positioning groove (23) through the stud (24). One end of the flexible slide rod (14) is inserted into the displacement hole (13) near the shielding cylinder inside the ceramic shell (1). The other end of the flexible slide rod (14) passes through the rod hole (18) and abuts against the lower end of the top plate (20).

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