A disconnecting device with temperature detection mechanism

Abstract

This utility model relates to the field of circuit breaker tripping devices, specifically a circuit breaker tripping device with a temperature detection mechanism. It includes a front-mounted circuit breaker tripping panel, a main body for performing circuit breaker tripping operations on a switchgear, and a circuit breaker housing fixedly mounted on the outside of the front-mounted circuit breaker panel for mounting vacuum circuit breakers on both external sides. The circuit breaker housing has an internal cavity. This utility model includes an internal cavity, a built-in coil, a bimetallic strip, a thermal response spring, a push head, a circuit breaker guide rod, a first contact, and a second contact. When this circuit breaker tripping device is used, a sudden increase in switchgear power will be transmitted to the built-in coil in the circuit breaker housing via the vacuum circuit breaker. The power and the heat it carries will be simultaneously sensed by the built-in coil. At this time, the bimetallic strip in the built-in coil will transfer the high temperature to the thermal response spring. The thermal response spring expands due to heat, extending and retracting to push the push head and circuit breaker guide rod downwards.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker opening devices, specifically to a circuit breaker opening device with a temperature detection mechanism. Background Technology

[0002] A circuit breaker tripping device is a mechanism that uses mechanical or electrical means to separate the contacts of a circuit breaker, thereby disconnecting the circuit. It is an important component of power equipment such as switchgear, responsible for cutting off the current when needed to protect equipment and personnel safety. When a fault such as overcurrent or short circuit occurs in the circuit, the circuit breaker tripping device can quickly respond to the instructions of protection devices such as relays and microprocessor protection, disconnect the faulty circuit, and prevent equipment damage or the escalation of the accident. It supports manual button, electric mechanism or remote control system triggering tripping to meet the operational needs of different scenarios.

[0003] In the operation of existing circuit breakers, if the circuit breaker lacks a temperature detection mechanism, it can only judge the equipment status by changes in current and voltage, which cannot detect temperature-related faults such as local overheating in a timely manner. Moreover, delayed circuit breaking can lead to the expansion of the fault range and affect the stability of the power system in the switch cabinet. Under such long-term use, the equipment operates at the critical temperature, which accelerates the aging of insulation materials and internal contacts and reduces the reliability of the equipment.

[0004] Therefore, it is necessary to invent a circuit breaker device with a temperature detection mechanism to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a circuit breaker with a temperature detection mechanism. This mechanism, achieved through an inner cavity, built-in coil, bimetallic strip, thermal response spring, push head, circuit breaker guide rod, first contact, and second contact, directly monitors the internal temperature of the circuit breaker to achieve over-temperature protection and trigger circuit breaker tripping. This avoids equipment damage such as insulation aging and contact welding. Furthermore, in certain fault conditions, temperature changes may precede significant changes in current and voltage. The thermal induction of the bimetallic strip and thermal response spring allows for a faster response. This temperature detection mechanism also reduces losses caused by equipment failure. This addresses the problem in existing circuit breaker systems where the lack of a temperature detection mechanism, relying solely on current and voltage changes to determine equipment status, fails to detect temperature-related faults such as localized overheating in a timely manner. Delayed tripping can also lead to an expansion of the fault range, affecting the stability of the power system in the switchgear. Long-term operation at critical temperatures accelerates the aging of insulation materials and internal contacts, reducing equipment reliability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a circuit breaker tripping device with a temperature detection mechanism, comprising a front circuit breaker tripping panel and a main body for performing circuit breaker tripping operations on switchgear;

[0007] The tripping housing is fixedly installed on the outside of the front tripping panel for fixing vacuum circuit breakers on both sides of the outside. The tripping housing has an inner cavity, and a partition plate is fixedly installed inside the inner cavity.

[0008] An arc-shaped frame is fixedly installed above the partition plate for internally fixing a built-in coil. A bimetallic strip is fixedly installed inside the built-in coil. A thermal response spring is fixedly installed at the bottom of the bimetallic strip. A push head is fixedly installed at the bottom of the thermal response spring. A tripping guide rod is fixedly installed at the bottom of the push head.

[0009] The first contact is fixedly installed inside the inner cavity, and a circuit lever is sleeved at the bottom. The inner cavity is rotatably connected to a rotating shaft. The second contact is fixedly installed outside the rotating shaft. An external connecting rod is fixedly installed outside the second contact. A push gate head is fixedly installed at the front end of the external connecting rod.

[0010] Preferably, side mounting plates are fixedly installed on both sides of the front trip panel, and fastening bolts are threaded through the exterior of each side mounting plate.

[0011] Preferably, the tripping guide rod is slidably connected to the partition plate, and the push head is perpendicularly distributed to the tripping guide rod.

[0012] Preferably, the second contact is rotatably connected to the inner cavity, and the front end of the first contact is in contact with the front end of the second contact.

[0013] Preferably, the pusher head is slidably connected to the front trip panel, and arc-extinguishing grid plates are fixedly installed on both sides of the inner cavity.

[0014] Preferably, the number of arc-extinguishing grids is set to multiple, and the multiple arc-extinguishing grids are distributed at equal intervals on the inner cavity.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] This utility model includes an inner cavity, a built-in coil, a bimetallic strip, a thermal response spring, a push head, a tripping guide rod, a first contact, and a second contact. When this tripping device is used, if the switchgear power suddenly increases, the power will be transferred to the built-in coil in the tripping housing through the vacuum circuit breaker. The power and the heat it carries will be simultaneously induced by the built-in coil. At this time, the bimetallic strip in the built-in coil will transfer the high temperature to the thermal response spring. The thermal response spring expands due to the heat, which will push the push head and the tripping guide rod downwards. The tripping guide rod passes through the first contact and pushes the second contact, which was originally in contact with the first contact, downwards. The contact is pushed down to expose a gap, thereby realizing the tripping operation, which disconnects the first contact from the second contact and closes the circuit. This design enables the tripping device to have a temperature detection mechanism. This temperature detection mechanism directly monitors the internal temperature of the tripping device to realize over-temperature protection, trigger the tripping, and avoid equipment damage such as insulation material aging and contact welding. At the same time, in some fault conditions, temperature changes will precede significant changes in current and voltage. The thermal induction of the bimetallic strip and thermal response spring can achieve faster response. Moreover, this temperature detection mechanism also reduces losses caused by equipment failure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the vacuum circuit breaker structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the built-in coil structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the tripping guide rod structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the second contact structure of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Front-mounted trip panel; 2. Side mounting plate; 3. Fastening bolts; 4. Tripping housing; 5. Vacuum circuit breaker; 6. Inner cavity; 7. Partition plate; 8. Arc-shaped frame; 9. Built-in coil; 10. Bimetallic strip; 11. Thermal response spring; 12. Push head; 13. Tripping guide rod; 14. First contact; 15. Circuit lever; 16. Rotating shaft; 17. Second contact; 18. External connecting rod; 19. Push head; 20. Arc extinguishing grid. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] This utility model provides, for example Figure 1-5 The circuit breaker tripping device shown includes a front-mounted circuit breaker tripping panel 1, which is the main body for performing circuit breaker tripping operations on the switchgear.

[0027] The tripping housing 4 is fixedly installed on the outside of the front tripping panel 1, and is used to fix the vacuum circuit breaker 5 on both sides of the outside. The tripping housing 4 has an inner cavity 6 inside, and a partition plate 7 is fixedly installed inside the inner cavity 6.

[0028] An arc-shaped frame 8 is fixedly installed above the partition plate 7. It is used to fix the built-in coil 9 inside, and a bimetallic strip 10 is fixedly installed inside the built-in coil 9. A thermal response spring 11 is fixedly installed at the bottom of the bimetallic strip 10, a push head 12 is fixedly installed at the bottom of the thermal response spring 11, and a tripping guide rod 13 is fixedly installed at the bottom of the push head 12.

[0029] The first contact 14 is fixedly installed inside the inner cavity 6, and a circuit lever 15 is fitted at the bottom. The inner cavity 6 is rotatably connected to a rotating shaft 16. The second contact 17 is fixedly installed outside the rotating shaft 16. An external connecting rod 18 is fixedly installed outside the second contact 17. A pusher head 19 is fixedly installed at the front end of the external connecting rod 18. Electricity is transmitted to the built-in coil 9 in the tripping housing 4 through the vacuum circuit breaker 5. Electricity and the heat carried by the electricity are simultaneously sensed by the built-in coil 9. At this time, the bimetallic strip 10 set in the built-in coil 9 will transfer the high temperature to the thermal response spring 11. The thermal response spring 11 expands due to heat and will extend and retract to push the pusher head 12 and the tripping guide rod 13 downward. The tripping guide rod 13 passes through the first contact 14 and pushes the second contact 17, which was originally in contact with the first contact 14, downward to create a gap, thereby realizing the tripping operation.

[0030] like Figure 1 , Figure 2 and Figure 3As shown, side mounting plates 2 are fixedly installed on both sides of the front trip panel 1. Fastening bolts 3 are threaded through the exterior of the side mounting plates 2. The side mounting plates 2 and fastening bolts 3 are used to assist the tripping device in installation and use in the switch cabinet. The tripping guide rod 13 is slidably connected to the partition plate 7. The push head 12 and the tripping guide rod 13 are vertically distributed. The partition plate 7 is used to separate the internal space of the inner cavity 6, thereby facilitating the tripping operation. The second contact 17 is rotatably connected to the inner cavity 6. The front end of the first contact 14 contacts the front end of the second contact 17. The thermal response spring 11 expands when heated, which will push the push head 12 and the tripping guide rod 13 downward. The tripping guide rod 13 passes through the first contact 14 and pushes the second contact 17, which was originally in contact with the first contact 14, downward to create a gap.

[0031] like Figure 1 , Figure 4 and Figure 5 As shown, the pusher head 19 is slidably connected to the front trip panel 1. Arc-extinguishing grid plates 20 are fixedly installed on both sides of the inner cavity 6. The pusher head 19 is used to manually push the second contact 17 to contact the first contact 14 through the outer connecting rod 18, thereby realizing the closing operation. The number of arc-extinguishing grid plates 20 is set to multiple, and the multiple arc-extinguishing grid plates 20 are distributed at equal intervals on the inner cavity 6. The arc-extinguishing grid plates 20 are set below the first contact 14 and the second contact 17, and are used to isolate and extinguish the arc transmitted from the first contact 14 and the second contact 17 due to the gap after the trip.

[0032] The working principle of this utility model is as follows: First, take out the tripping device and install it in the switchgear with the assistance of the side mounting plate 2 and fastening bolts 3. Then, connect the external power supply and push the pusher head 19 on the outside of the front tripping panel 1 to slide upwards. This causes the pusher head 19 to connect to the external connecting rod 18, which drives the front end of the second contact 17 to rotate in the inner cavity 6, allowing the second contact 17 to contact the first contact 14 to form a circuit, thus ensuring the normal power transmission. Then, in the event of a sudden increase in the power of the switchgear, the power will be transferred to the built-in coil 9 in the tripping housing 4 through the vacuum circuit breaker 5. Subsequently, the power and the heat carried by the power will be simultaneously sensed by the built-in coil 9. At this time, the bimetallic strip 10 set in the built-in coil 9 will transfer the high temperature to the thermal response spring 11. Then, the thermal response spring 11 will expand due to heat, which will push the pusher head 12 and the tripping guide rod 13 downwards. Then, the tripping guide rod 13 passes through... The first contact 14 pushes down the second contact 17, which was originally in contact with the first contact 14, creating a gap. Simultaneously, the external pusher head 19 also slides down with the external connecting rod 18, thereby realizing the opening operation. This disconnects the first contact 14 from the second contact 17, closing the circuit. This design gives the opening device a temperature detection mechanism. This temperature detection mechanism directly monitors the internal temperature of the opening device to realize over-temperature protection and trigger the opening, avoiding equipment damage such as insulation material aging and contact welding. At the same time, in some fault conditions, temperature changes will precede significant changes in current and voltage. The bimetallic strip 10 and the thermal response spring 11 can respond faster through thermal sensing. Finally, after completing the installation and use of the entire opening device according to the above operation, routine maintenance of the device is required. If it is not used for a long time, the external power supply should be disconnected. In this way, the use of the opening device with a temperature detection mechanism is completed.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker tripping device with a temperature detection mechanism, characterized in that: include The front-mounted trip panel (1) is the main body used for tripping the switchgear. The tripping housing (4) is fixedly installed on the outside of the front tripping panel (1) for fixing vacuum circuit breakers (5) on both sides of the outside. The tripping housing (4) has an inner cavity (6) inside, and a partition plate (7) is fixedly installed inside the inner cavity (6). An arc-shaped frame (8) is fixedly installed above the partition plate (7) for the internal installation of a built-in coil (9), and a bimetallic strip (10) is fixedly installed inside the built-in coil (9). A thermal response spring (11) is fixedly installed at the bottom of the bimetallic strip (10), a push head (12) is fixedly installed at the bottom of the thermal response spring (11), and a tripping guide rod (13) is fixedly installed at the bottom of the push head (12). The first contact (14) is fixedly installed inside the inner cavity (6) for the bottom of which a circuit lever (15) is sleeved. The inner cavity (6) is rotatably connected to a rotating shaft (16). The second contact (17) is fixedly installed outside the rotating shaft (16). An external connecting rod (18) is fixedly installed outside the second contact (17). A push gate head (19) is fixedly installed at the front end of the external connecting rod (18).

2. The circuit breaker device with a temperature detection mechanism according to claim 1, characterized in that: Side mounting plates (2) are fixedly installed on both sides of the front trip panel (1), and fastening bolts (3) are threaded through the outside of the side mounting plates (2).

3. The circuit breaker device with a temperature detection mechanism according to claim 1, characterized in that: The tripping guide rod (13) is slidably connected to the partition plate (7), and the push head (12) is perpendicularly distributed to the tripping guide rod (13).

4. A circuit breaker device with a temperature detection mechanism according to claim 1, characterized in that: The second contact (17) is rotatably connected to the inner cavity (6), and the front end of the first contact (14) is in contact with the front end of the second contact (17).

5. A circuit breaker device with a temperature detection mechanism according to claim 1, characterized in that: The pusher head (19) is slidably connected to the front opening panel (1), and arc-extinguishing grid plates (20) are fixedly installed on both sides of the inner cavity (6).

6. A circuit breaker device with a temperature detection mechanism according to claim 5, characterized in that: The number of the arc-extinguishing grid plates (20) is set to multiple, and the multiple arc-extinguishing grid plates (20) are distributed at equal intervals on the inner cavity (6).

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