Switch contactor with protection function
By using components such as insulation resistance testers and electric telescopic rods in the contactors, rapid power outage and alarms for leakage are achieved, which solves the problem of leakage risk of existing contactors in complex environments and improves safety and protection performance.
Patent Information
- Application Number
- CN202421100185.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-20
AI Technical Summary
Existing contactors have a risk of leakage in complex environments, resulting in safety threats from operators and equipment damage, and their protective performance lacks the ability to detect and protect complex leakage situations.
A switch contactor with protection function was designed, using an insulation resistance tester for leakage detection, controlling the electric telescopic rod and insulating shell for insulation isolation, and quickly power outage through extrusion plates and moving inclined plates, combined with a buzzer Issue an alarm to reduce safety hazards.
Effectively prevent damage caused by contactor leakage, reduce safety hazards, and improve the detection and protection capabilities of complex leakage situations.
Smart Images
Figure CN222281864U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of contactors, in particular to a switch contactor with a protective function. Background Art
[0002] Contactors are widely used switching devices that use electromagnetic, pneumatic or hydraulic principles to control the circuit to switch the main circuit on and off. Contactors have the advantages of strong current breaking capacity, rapid action, safe operation, frequent operation and remote control, but they cannot cut off short-circuit currents, so contactors usually have to be used in conjunction with fuses.
[0003] With the continuous improvement of the automation level of power systems, contactors, as an important electrical control component, have been widely used in industrial production, building power distribution, new energy and other fields. Contactors are mainly used to frequently connect and disconnect circuits over long distances to achieve automatic control of equipment such as motors and transformers. However, in the actual use of existing contactors, especially in complex and changeable working environments, there is a certain risk of leakage, which not only threatens the personal safety of operators, but also may cause serious consequences such as equipment damage, production interruption and even fire, posing a major challenge to the stable operation of the system. At present, the common contactors on the market have protection performance mainly reflected in conventional protection functions such as overload and short circuit, and the design of leakage protection is relatively weak. Although some contactors are equipped with basic ground fault protection, in the face of complex leakage situations, such as insulation aging and distributed leakage caused by humid environment, their detection and protection capabilities are still insufficient, and there are certain safety hazards. For the problems in related technologies, no effective solution has been proposed yet. Therefore, it is necessary to propose a switch contactor with protection function to solve the above-mentioned problems. Utility Model Content
[0004] In view of the problems in the related art, the utility model proposes a switch contactor with a protection function to overcome the above technical problems existing in the existing related art.
[0005] To this end, the specific technical solutions adopted by the utility model are as follows:
[0006] A switch contactor with a protection function comprises a protective shell, a support frame is fixedly connected to the inner wall of the protective shell, a contactor body is fixedly installed on the surface of the support frame, a coil input terminal is provided on one side of the surface of the contactor body, an auxiliary input terminal is provided on one side of the coil input terminal, and a contact input terminal is provided on one side of the auxiliary input terminal; the coil input terminal and the contact input terminal comprise an insulating protective cylinder, a wiring barrel is fixedly installed in the insulating protective cylinder, a clamping screw is connected to the internal thread of the wiring barrel, a protective groove is opened on the top of the contactor body, an input interface is opened at one end of the protective groove, the input interface cooperates with one end of the wiring barrel, one end of the insulating protective cylinder is slidably installed in the protective groove, movable inclined plates are fixedly connected on both sides of the surface of the insulating protective cylinder, electric telescopic rods are fixedly installed on both sides of the inner wall of the protective shell, the end of the electric telescopic rod is fixedly connected to the insulating shell, an extrusion plate is fixedly connected to the inner wall of the insulating shell, a partition plate is fixedly connected to one side of the surface of the extrusion plate, and an insulation resistance tester is fixedly installed on one side of the surface of the contactor body.
[0007] Furthermore, in order to achieve connection of the load on the contactor body, a coil output terminal is installed below the coil input terminal, an auxiliary output terminal is installed below the auxiliary input terminal, and a contact output terminal is installed below the contact input terminal.
[0008] Furthermore, in order to control the electric telescopic rod and the insulation resistance tester, a controller is fixedly installed on one side of the electric telescopic rod.
[0009] Furthermore, in order to sound an alarm when leakage occurs in the contactor body, a buzzer is fixedly mounted on one side of the inner wall of the protective shell.
[0010] Furthermore, in order to protect the moving contacts in the contactor body, a contact protection cover is slidably mounted on one side of the surface of the contactor body.
[0011] Furthermore, in order to realize the opening and closing of the protective shell and to inspect the internal electrical components, an inspection door is rotatably installed on the surface of the protective shell.
[0012] Furthermore, in order to dissipate heat inside the protective shell, heat dissipation holes are opened on both sides of the inner wall of the protective shell.
[0013] The beneficial effects of the utility model are as follows: the surface of the contactor body is tested for leakage through an insulation resistance tester. When leakage occurs in the contactor body, the controller controls the electric telescopic rod to extend, so that the electric telescopic rod drives the insulating shell to move downward to cover the surface of the contactor body, thereby insulating and isolating the contactor body; after the insulating shell moves downward, the extrusion plate on its inner wall is driven to move downward into the protective groove, so that the extrusion plate squeezes the moving inclined plate, so that the moving inclined plate drives the insulating protective cylinder to slide toward the outside of the contactor body, separates the input interface from the wiring barrel, realizes rapid power-off of the contactor body, effectively prevents damage caused by leakage of the contactor body, and reduces safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 It is a schematic diagram of the surface structure of a switch contactor with a protective function according to an embodiment of the utility model;
[0016] Figure 2 It is a schematic diagram of the surface structure of a contactor body in a switch contactor with a protective function according to an embodiment of the utility model;
[0017] Figure 3 It is a detailed internal view of a protection slot in a switch contactor with protection function according to an embodiment of the utility model;
[0018] Figure 4 It is a back view of an insulating housing in a switch contactor with a protective function according to an embodiment of the utility model;
[0019] Figure 5 The utility model is a schematic diagram of the installation structure of an extrusion plate and an insulating protective cylinder in a switch contactor with a protective function according to an embodiment of the utility model.
[0020] In the figure:
[0021] 1. Protective shell; 2. Support frame; 3. Contactor body; 4. Coil input terminal; 5. Auxiliary input terminal; 6. Contact input terminal; 7. Insulation protection tube; 8. Wiring tube; 9. Clamping screw; 10. Protection slot; 11. Input interface; 12. Moving inclined plate; 13. Electric telescopic rod; 14. Insulation shell; 15. Extrusion plate; 16. Partition plate; 17. Insulation resistance tester; 18. Coil output terminal; 19. Auxiliary output terminal; 20. Contact output terminal; 21. Controller; 22. Buzzer; 23. Contact protection cover; 24. Inspection door; 25. Heat dissipation hole. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] According to an embodiment of the utility model, a switch contactor with a protection function is provided.
[0024] Embodiment 1:
[0025] like Figure 1-Figure 5As shown, a switch contactor with a protective function according to an embodiment of the utility model comprises a metal rectangular protective shell 1, a support frame 2 is fixedly connected to both sides of the inner wall of the protective shell 1, a contactor body 3 is fixedly installed on the surface of the support frame 2 by bolts, a coil input terminal 4 is installed on one side of the top of the surface of the contactor body 3, which is used to input power to the internal coil; an auxiliary input terminal 5 is provided on one side of the coil input terminal 4, which is used to detect the contact connection state inside the contactor body 3; a contact input terminal 6 is provided on one side of the auxiliary input terminal 5, which is used to detect the internal The contacts provide power; the coil input terminal 4 and the contact input terminal 6 include an insulating protective tube 7, in which a conductive metal wire barrel 8 is fixedly installed for receiving the insertion part of the wire; the internal thread of the wire barrel 8 is connected with a clamping screw 9 for fixing the end of the wire to the wire barrel 8; a protective groove 10 is provided on the top of the contactor body 3, and an input interface 11 is provided at one end of the protective groove 10, and the input interface 11 cooperates with one end of the wire barrel 8, and the power can be input to the On the contacts in the contactor body 3; one end of the insulating protective tube 7 is slidably installed in the protective groove 10, which is used to realize the connection and disconnection of the wiring tube 8 and the input interface 11; the surface of the insulating protective tube 7 is fixedly connected with movable inclined plates 12 on both sides, and a pair of electric telescopic rods 13 are fixedly installed on both sides of the inner wall of the protective shell 1, and the ends of the electric telescopic rods 13 are fixedly connected with an insulating shell 14 made of rubber material. The inner wall of the insulating shell 14 matches the size of the contactor body 3, and four pairs of extrusion plates 15 are fixedly connected to the inner wall of the insulating shell 14, which correspond to the four coil input terminals respectively. The contact input terminal 6, and the inclined surface on the extrusion plate 15 matches the inclined surface of the movable inclined plate 12; a partition plate 16 is fixedly connected to one side of the surface of the extrusion plate 15. When the extrusion plate 15 moves downward to squeeze the movable inclined plate 12, the movable inclined plate 12 drives the insulating protective tube 7 to slide to the outside of the protective groove 10, so that the end of the wiring tube 8 connected to the input interface 11 is separated, and the partition plate 16 moves between the two to realize power off of the contactor body 3; an insulation resistance tester 17 is fixedly installed on one side of the surface of the contactor body 3 for leakage detection on the surface of the contactor body 3.
[0026] like Figure 1-Figure 5As shown, a coil output terminal 18 is installed below the coil input terminal 4, which is used to form a loop for the coil in the contactor body 3; an auxiliary output terminal 19 is installed below the auxiliary input terminal 5, which is used to feedback the connection status of the contact; a contact output terminal 20 is installed below the contact input terminal 6, which is used to connect the load to the contactor body 3; a controller 21 is fixedly installed on one side of the electric telescopic rod 13, and the controller 21 is a microcontroller, which is used to receive the leakage signal and control the switch of the electric telescopic rod 13 and the buzzer 22; the inner wall of the protective housing 1 is fixed on one side. A buzzer 22 is installed to sound an alarm when the contactor body 3 leaks electricity. The power supply connected to the electric telescopic rod 13, the buzzer 22, the insulation resistance tester 17 and the controller 21 is not the same power supply as the contactor body 3. A contact protection cover 23 is slidably installed on one side of the surface of the contactor body 3 to protect the contacts in the contactor body 3. An inspection door 24 is rotatably installed on the surface of the protective shell 1 to facilitate opening the protective shell 1 to inspect the internal electrical components. Heat dissipation holes 25 are provided on both sides of the inner wall of the protective shell 1 to ventilate and dissipate heat inside the protective shell 1.
[0027] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.
[0028] In actual application, the surface of the contactor body 3 is monitored for leakage through the insulation resistance tester 17. When leakage is detected in the contactor body 3, the insulation resistance tester 17 sends a signal to the controller 21. The controller 21 controls the buzzer 22 to sound an alarm and starts the electric telescopic rod 13 to extend downward. After the electric telescopic rod 13 is extended, it drives the insulating shell 14 to move downward to cover the surface of the contactor body 3, thereby insulating and isolating the contactor body 3; after the insulating shell 14 moves downward, it drives each extrusion plate 15 on its inner wall to move downward into the corresponding protective groove 10, so that the extrusion plate 15 squeezes and pushes the movable inclined plates 12 on both sides of the insulating protective tube 7, so that the movable inclined plates 12 drive the insulating protective tube 7 to slide to the outside of the protective groove 10, thereby separating the end of the input interface 11 connected to the wiring tube 8, thereby realizing rapid power off of the contactor body 3 and effectively preventing damage caused by leakage of the contactor body 3.
[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A switch contactor with a protective function, characterized in that: It comprises a protective shell (1), a support frame (2) is fixedly connected to the inner wall of the protective shell (1), a contactor body (3) is fixedly mounted on the surface of the support frame (2), a coil input terminal (4) is provided on one side of the surface of the contactor body (3), an auxiliary input terminal (5) is provided on one side of the coil input terminal (4), and a contact input terminal (6) is provided on one side of the auxiliary input terminal (5); The coil input terminal (4) and the contact input terminal (6) include an insulating protective tube (7), a wiring tube (8) is fixedly installed in the insulating protective tube (7), and the internal thread of the wiring tube (8) is connected to a clamping screw (9), the top of the contactor body (3) is provided with a protective groove (10), one end of the protective groove (10) is provided with an input interface (11), the input interface (11) is matched with one end of the wiring tube (8), and one end of the insulating protective tube (7) is slidably installed in the protective groove (10) Inside, movable inclined plates (12) are fixedly connected to both sides of the surface of the insulating protective tube (7), electric telescopic rods (13) are fixedly installed on both sides of the inner wall of the protective shell (1), the end of the electric telescopic rod (13) is fixedly connected to the insulating shell (14), an extrusion plate (15) is fixedly connected to the inner wall of the insulating shell (14), a partition plate (16) is fixedly connected to one side of the surface of the extrusion plate (15), and an insulation resistance tester (17) is fixedly installed on one side of the surface of the contactor body (3).
2. A switch contactor with protection function according to claim 1, characterized in that: A coil output terminal (18) is installed below the coil input terminal (4), an auxiliary output terminal (19) is installed below the auxiliary input terminal (5), and a contact output terminal (20) is installed below the contact input terminal (6).
3. A switch contactor with protection function according to claim 1, characterized in that: A controller (21) is fixedly mounted on one side of the electric telescopic rod (13).
4. A switch contactor with protection function according to claim 1, characterized in that: A buzzer (22) is fixedly mounted on one side of the inner wall of the protective housing (1).
5. A switch contactor with protection function according to claim 1, characterized in that: A contact protection cover (23) is slidably mounted on one side of the surface of the contactor body (3).
6. A switch contactor with protection function according to claim 1, characterized in that: An inspection door (24) is rotatably mounted on the surface of the protective housing (1).
7. A switch contactor with protection function according to claim 1, characterized in that: Heat dissipation holes (25) are provided on both sides of the inner wall of the protective shell (1).