Back-up protection switch opening and closing tripping device

Abstract

When the back-up protection switch opening and closing tripping device is used, a circuit is conducted and passes through the power connection block, and when current generated by lightning stroke is small, the current enters the device and enters through the contact switch, and the current passes through the connecting wire and then is led out through a grounding structure formed by the two metal connecting pieces; when the current generated by lightning stroke is large, the coil in the external electromagnetic mechanism is electrified to generate a magnetic field, the ejector pin in the coil support collides with the contact switch, the contact switch is unhooked from the abutting stop block, at the moment, the backup protection switch trips, and the surge protection device is disconnected to protect electrical equipment. When the current is large, the contact switch is unhooked from the stop block while being impacted, so that the protection function of the backup switch is realized, and unnecessary loss caused by unhooking delay is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of backup protection switch movable contact, especially to backup protection switch opening and closing tripping device. BACKGROUND

[0002] Backup protection refers to the protection used to remove faults when the main protection or circuit breaker refuses to act. When a circuit fails, the protection on the circuit will immediately send a signal to disconnect the circuit breaking element. This immediate action protection is the main protection. When the main protection fails to act due to various reasons, another protection will start and act to trip the faulty circuit. This protection is the backup protection. Multiple sets of protection can be installed in a circuit to ensure safe operation of the circuit. For example, the movable contact mechanism and DC contactor of Chinese utility model patent No. CN221125829U includes a push rod mechanism and a bracket connected to the push rod mechanism. An armature is provided above the push rod mechanism. A contact spring is provided between the armature and the push rod mechanism. A magnetic yoke is provided on the armature. A movable contact is provided between the armature and the magnetic yoke. The bracket includes a top plate and a side plate. The magnetic yoke is arranged below the top plate. The armature and the movable contact are riveted by a rivet. The armature and the movable contact are riveted by a rivet, which has higher reliability and smaller middle hole of the movable contact. The current carrying capacity of the movable contact and the magnetic permeability of the armature are also enhanced.

[0003] The above device still has some problems in use. The device uses a push rod action to push the contact structure to break. Due to the reaction time of the push rod reaction brake, the movable contact may still fall back during the push rod reaction process, causing excessive current damage to the circuit. UTILITY MODEL CONTENTS

[0004] In view of the above technical problems, the utility model provides a backup protection switch opening and closing tripping device, which is characterized by being composed of a connecting cable, an electricity connection structure, a contact structure, and a grounding structure. The electricity connection structure is installed with the contact structure on one side, and the connecting cable is installed on the other side. One end of the connecting cable is connected to the grounding structure,

[0005] The electricity connection structure is composed of an electricity connection block, a connecting block, a connecting shaft, a side connecting plate A, a side connecting plate B, a connecting spring A, and a connecting spring B. The connecting block is installed below the electricity connection block. The connecting cable is installed on the side of the connecting block. The connecting shaft is installed on the side of the electricity connection block. The side connecting plate A is installed on one side of the connecting shaft. The connecting spring A is installed above the side connecting plate A. The side connecting plate B is installed on the other side of the connecting shaft. The connecting spring B is installed above the side connecting plate B,

[0006] The contact structure consists of a contact switch, a stop block, a spring, an insulating block, a baffle A, and a baffle B. The insulating block has an opening on one side to fit onto the connecting shaft. Baffle A is installed on one side of the insulating block, and baffle B is installed on the other side. The contact switch is fitted onto the outside of the insulating block, and the stop block is also fitted onto the outside of the insulating block, abutting against the contact switch. A spring is installed below the other end of the insulating block.

[0007] The grounding structure consists of metal connector A, metal connector B, and fixing bolts. The other end of the connecting cable is connected to metal connector A. Metal connector B is fitted over metal connector A. The fixing bolts pass through openings at the bottom of metal connector A and metal connector B.

[0008] The connecting side plate A and the connecting side plate B are respectively fitted onto both sides of the insulating block.

[0009] The beneficial effects of this utility model are:

[0010] This utility model relates to a backup protection switch tripping device. When using this device, the circuit is conducted through the grounding block. When the lightning strike current is small, the current enters the device through the contact switch, flows through the connecting wire, and is then discharged through a grounding structure formed by two metal connectors. When the lightning strike current is large, the coil in the external electromagnetic mechanism is energized, generating a magnetic field. The pin inside the coil support impacts the contact switch, causing it to disengage from the blocking block. At this point, the backup protection switch trips, and the surge protector disconnects to protect the electrical equipment. When the current is large, the contact switch disengages from the blocking block simultaneously with the impact, achieving the backup switch's protective function and avoiding unnecessary losses due to delayed disengagement. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the backup protection switch opening and closing tripping device of this utility model;

[0012] Figure 2 This is a partial structural schematic diagram of the backup protection switch opening and closing tripping device of this utility model;

[0013] Figure 3 This is a partial structural schematic diagram of the backup protection switch opening and closing tripping device of this utility model;

[0014] Figure 4 This is a partial structural schematic diagram of the backup protection switch opening and closing tripping device of this utility model;

[0015] Figure 5 This is a partial structural schematic diagram of the backup protection switch opening and closing tripping device of this utility model;

[0016] Figure 6Partial structure schematic view of the backup protection switch opening and closing tripping device of the utility model;

[0017] Figure 7 Partial structure schematic view of the backup protection switch opening and closing tripping device of the utility model;

[0018] As shown in the figure: 1. power block, 2. connecting block, 3. connecting shaft, 4. side connecting plate A, 5. side connecting plate B, 6. connecting spring A, 7. connecting spring B, 8. connecting cable, 9. metal connecting piece A, 10. metal connecting piece B, 11. fixing bolt, 12. contact switch, 13. stop block, 14. connecting spring, 15. insulating block, 16. baffle A, 17. baffle B. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings, obviously, the described embodiments are a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0020] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] Embodiment 1

[0023] As Figure 1As shown, the connecting block 2 is installed below the power block 1, the connecting cable 8 is installed on the side of the connecting block 2, the connecting shaft 3 is installed on the side of the power block 1, the side connecting plate A 4 is installed on one side of the connecting shaft 3, the connecting spring A 6 is installed above the side connecting plate A 4, the side connecting plate B 5 is installed on the other side of the connecting shaft 3, the connecting spring B 7 is installed above the side connecting plate B 5, the insulation block 15 is sleeved on the connecting shaft 3 through the hole on one side of the insulation block 15, the baffle A 16 is installed on one side of the insulation block 15, the baffle B 17 is installed on the other side of the insulation block 15, the contact switch 12 is sleeved on the outer side of the insulation block 15, the stop block 13 is sleeved on the outer side of the insulation block 15, the stop block abuts against the contact switch 12, the spring 14 is installed below the other end of the insulation block 15, the other end of the connecting cable 8 is connected to the metal connecting piece A 9, the metal connecting piece B 10 is sleeved outside the metal connecting piece A 9, and the fixing bolt 11 passes through the holes below the metal connecting piece A 9 and the metal connecting piece B 10.

[0024] Embodiment 2

[0025] When the circuit is turned on by the power block 1, when the current generated by lightning is small, the current enters the device, the current enters the contact switch 12, and the current is discharged by the grounding structure composed of the metal connecting piece A and the metal connecting piece B through the connecting wire 8; when the current generated by lightning is large, the coil in the external electromagnetic mechanism is energized to generate a magnetic field, the ejector pin in the coil support impacts the contact switch 12, the contact switch 12 and the stop block 13 are unhooked, the switch is tripped, and the surge protector is disconnected to protect the electrical equipment.

[0026] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. The components mentioned in the utility model are common techniques in the prior art, which should be understood by those skilled in the art. The utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements fall within the scope of the utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A backup protection switch opening and closing tripping device, characterized in that It is composed of connecting cable, electricity connection structure, contact structure and grounding structure, the electricity connection structure is installed with contact structure on one side, and connecting cable on the other side, and the connecting cable is connected with grounding structure on one end.

2. The backup protection switch opening and closing tripping device according to claim 1, characterized in that The electricity connection structure is composed of electricity block, connecting block, connecting shaft, side connecting plate A, side connecting plate B, connecting spring A and connecting spring B, the connecting block is installed below the electricity block, the connecting cable is installed on the side of the connecting block, the connecting shaft is installed on the side of the electricity block, the side connecting plate A is installed on one side of the connecting shaft, the connecting spring A is installed above the side connecting plate A, the side connecting plate B is installed on the other side of the connecting shaft, and the connecting spring B is installed above the side connecting plate B.

3. The backup protection switch opening and closing tripping device according to claim 2, characterized in that The contact structure is composed of contact switch, stop block, spring, insulation block, baffle A and baffle B, the insulation block is sleeved on the connecting shaft on one side, the baffle A is installed on one side of the insulation block, the baffle B is installed on the other side of the insulation block, the contact switch is sleeved on the outside of the insulation block, the stop block is sleeved on the outside of the insulation block, the stop block abuts against the contact switch, and the spring is installed below the other end of the insulation block.

4. The backup protection switch opening and closing tripping device according to claim 1, characterized in that The grounding structure is composed of metal connecting piece A, metal connecting piece B and fixing bolt, the other end of the connecting cable is connected with the metal connecting piece A, the metal connecting piece B is sleeved outside the metal connecting piece A, and the fixing bolt passes through the holes below the metal connecting piece A and the metal connecting piece B.

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