Single-contact conductive device of control and protection switch

Abstract

The utility model discloses a single contact conductive device of a control and protection switch, comprising a contact support and a housing, the housing is composed of a first housing and a second housing, the contact support is internally provided with a push rod, a circuit breaker module, a static contact, an arc extinguishing zone, a moving contact, an instrument member, a main rotating shaft, a main contact spring and a chute, and the push rod is provided with an arc extinguishing zone. The ejector rod is arranged in the middle of the shell, the sliding groove is formed in the bottom of the ejector rod, the sliding groove is in sliding connection with the ejector rod, and one end of the static contact is fixedly connected with the second shell. A static contact system on an existing control and protection switch mostly adopts a double-breakpoint structure, namely the center positions of moving and static contacts are fixedly connected with static contact supports, moving contacts are arranged at the two ends of the moving and static contacts respectively, and the two static and static contacts are located above the moving contacts; compared with the scheme in the prior art, the structure of the scheme is simplified, the same function is realized by adopting a single static contact, the breaking capacity is more stable, and the effects of reducing cost and increasing efficiency are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to a single-contact conductive device for controlling and protecting switches. Background Art

[0002] The control and protection switch products adopt a modular single product structure, integrating the main functions of traditional circuit breakers, contactors, overload (or overcurrent, phase failure) protection relays, starters, isolators, etc. They are mainly used in power systems with AC 50Hz (60Hz), rated voltage up to 690V, rated current from 0.8A to 630A, and adjustable working current from 0.8A to 630A to connect, carry and disconnect circuits under normal conditions (including specified overload conditions), and can connect, carry and disconnect circuits under specified abnormal conditions (such as short circuits).

[0003] The static contact system is an important part of the switch, and is mainly used to connect, carry and disconnect the current flowing through the main circuit when the switch is working. Most of the static contact systems on existing control and protection switches adopt a double breakpoint structure, that is, the center position of the moving and static contacts is connected and fixed to the static contact support, and the moving contacts are respectively provided at both ends of the moving and static contacts, and the two static contacts are located above the moving contacts. Although such a structure can realize the on-off function, it is more troublesome to install and fix such a static contact system, and the double-end structure is prone to asynchronous site, which affects the stability of on-off.

[0004] Therefore, the utility model provides a conductive device of a rotary single-breakpoint contact to increase the breaking capacity. Utility Model Content

[0005] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a single-contact conductive device for controlling and protecting a switch.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] A single-contact conductive device for a control and protection switch comprises a contact support and a housing, wherein the housing is composed of a first housing and a second housing, wherein a push rod, a circuit breaker module, a static contact, an arc extinguishing zone, a moving contact, an instrument component, a main rotating shaft, a main contact spring and a slide groove are arranged in the contact support, wherein the push rod is arranged in the middle of the housing, wherein the slide groove is arranged at the bottom of the push rod, wherein the slide groove is slidably connected to the push rod, wherein one end of the static contact is fixedly connected to the second housing, and the other end is abutted against the first housing, wherein a plurality of clamping parts are further arranged in the first housing, wherein the clamping parts are fixedly connected to the second housing;

[0008] The single-contact conductive device is provided with a control circuit. When the control circuit is energized and attracted, the main rotating shaft rotates, and the compressed main contact spring drives the contact support to move upward through the reaction force. One end of the moving contact is fixed by the instrument component, and the other end is used to rotate until the static contact is closed and the circuit is connected;

[0009] When the control circuit is powered off, the main rotating shaft is pressed downward by the main contact spring, driving the contact support to move downward, and the moving contact fixed at one end rotates under the moving contact support, causing the moving contact and the static contact to separate, thereby disconnecting the main circuit.

[0010] It is further defined that a reset portion is further provided in the housing, and the reset portion is provided at the bottom of the slide groove. With such a structural design, a linkage effect between the reset portion and the ejector rod can be achieved by providing the reset portion.

[0011] It is further defined that it also includes a limiting part, and the limiting part is arranged in the first shell, and the first shell fixes the circuit breaker module through the limiting part. With such a structural design, the limiting part plays a limiting and fixing effect, and effectively prevents the circuit breaker module from falling off.

[0012] It is further defined that the reset portion is an elastic element. With such a structural design, the use of the elastic element can mitigate the impact caused by the vertical load of the push rod.

[0013] It is further defined that the elastic element can be a rubber spring or a coil spring. With such a structural design, the coil spring does not need lubrication and requires little longitudinal space for installation, and the rubber spring has the advantages of sound insulation and noise-free during operation.

[0014] It is further defined that an arc extinguishing device is provided in the arc extinguishing area, an arc extinguishing channel is provided between the static contact and the arc extinguishing device, one end of the arc extinguishing channel is connected to the static contact, and the other end is connected to the arc extinguishing device. Such a structural design, by providing the extinguishing channel and the arc extinguishing device, has the effect of arc initiation and arc extinguishing, so that the arc generated after the static contact is energized can be extinguished in time.

[0015] Beneficial effects of the utility model:

[0016] Most of the static contact systems on existing control and protection switches adopt a double-breakpoint structure, that is, the center position of the moving and static contacts is connected and fixed to the static contact support, and moving contacts are respectively provided at both ends of the moving and static contacts, and two static contacts are located above the moving contacts. Although such a structure can achieve the on-off function, it is more troublesome to install and fix such a static contact system, and the double-end structure is prone to asynchronous site, thus affecting the stability of on-off; the structure of this solution is simpler than the existing technology, and a single static contact is used to achieve the same function, and the breaking capacity is more stable, which has the effect of reducing costs and increasing efficiency;

[0017] In addition, in order to save costs and increase the breaking capacity, this solution changes the double-breakpoint contacts of the contactor in the prior art into single-breakpoint contacts, and changes the original contacts that move up and down to connect or disconnect the main circuit into a rotating single-breakpoint contact to connect and disconnect the main circuit. Compared with the double-breakpoint contacts, the opening distance is larger, that is, the distance opened when breaking the arc is also larger, which is more conducive to the extinguishing of the arc, effectively reducing the arc burning time to achieve the purpose of increasing the breaking capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a single-contact conductive device of a control and protection switch of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a housing 1A of an embodiment of a single-contact conductive device of a control and protection switch of the utility model;

[0021] Figure 3 It is an overall top view of an embodiment of a single-contact conductive device of a control and protection switch of the utility model;

[0022] Figure 4 A top view of a housing 1A of an embodiment of a single-contact conductive device for a control and protection switch of the utility model;

[0023] The symbols of the main components are described as follows: housing 1, top rod 2, circuit breaker module 3, static contact 4, arc extinguishing zone 5, first housing 1A, second housing 1B, limiting part 7, sliding groove 8, and clamping part 9. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] like Figure 1 As shown, the single-contact conductive device of the control and protection switch of the utility model comprises a contact support and a housing 1, wherein the housing 1 is composed of a first housing 1A and a second housing 1B, wherein a push rod 2, a circuit breaker module 3, a static contact 4, an arc extinguishing zone 5, a moving contact, an instrument component, a main rotating shaft, a main contact spring and a slide groove 8 are arranged in the contact support, wherein the push rod 2 is arranged in the middle of the housing 1, wherein the slide groove 8 is arranged at the bottom of the push rod 2, wherein the slide groove 8 is slidably connected to the push rod 2, wherein one end of the static contact 4 is fixedly connected to the second housing 1B, and the other end is abutted against the first housing 1A, wherein a plurality of clamping parts 9 are further arranged in the first housing 1A, wherein the clamping parts 9 are fixedly connected to the second housing 1B,

[0029] The single-contact conductive device is provided with a control circuit. When the control circuit is energized and attracted, the main rotating shaft rotates, and the compressed main contact spring drives the contact support to move upward through the reaction force. One end of the moving contact is fixed by the instrument component, and the other end is used to rotate until the static contact 4 is closed and the circuit is connected;

[0030] When the control circuit is powered off, the main rotating shaft is pressed downward by the main contact spring, driving the contact support to move downward, and the moving contact fixed at one end rotates under the moving contact support, causing the moving contact and the static contact 4 to separate, thereby disconnecting the main circuit.

[0031] There are three clamping parts 9, all of which are embedded in the bottom of the first housing 1A; there are two limiting parts 7, and the circuit breaker module 3 is arranged between the two limiting parts 7;

[0032] In addition, the arc extinguishing device adopts a transverse metal grid to extinguish the arc, which uses the short arc extinguishing principle. A metal sheet made of magnetic material is placed in the arc to divide the arc into several short arcs, and the near-cathode effect of the AC arc and the near-pole voltage drop of the DC arc are used to achieve the purpose of extinguishing the arc.

[0033] As another embodiment of the present solution, the present solution can also be implemented through two structures. One is that one end of the moving contact is fixed by a fixed shaft, and the other end rotates in a state where the contact is supported and moved to achieve the purpose of increasing the opening distance and reducing the arc extinguishing time;

[0034] As another embodiment of the present scheme, the moving contact is fixed on the contact support by a fixed shaft, and one end is blocked from moving up and down by the fixed shaft. With such an arrangement, when the contact support moves up and down, the other end of the static contact can only move in rotation, thereby accelerating the separation time and disconnection distance of the moving contact and preventing the moving contact from detaching from the contact support.

[0035] Preferably, a reset part is further provided in the housing 1, and the reset part is provided at the bottom of the slide groove 8. With such a structural design, a linkage effect between the reset part and the ejector rod can be achieved by providing the reset part. In fact, a positioning structure can be provided around the reset part according to specific circumstances to prevent the reset part from moving horizontally.

[0036] Preferably, it further includes a limiting portion 7, which is disposed in the first housing 1A, and the first housing 1A fixes the circuit breaker module 3 through the limiting portion 7. With such a structural design, the limiting portion 7 plays a limiting and fixing effect, effectively preventing the circuit breaker module 3 from falling off. In fact, the number of limiting portions 7 may be increased according to specific circumstances to improve the limiting effect.

[0037] Preferably, the reset portion is an elastic element. With such a structural design, the use of the elastic element can mitigate the impact caused by the vertical load of the push rod.

[0038] Preferably, the elastic element can be a rubber spring or a coil spring. With such a structural design, the coil spring does not need lubrication and requires little longitudinal space for installation. The rubber spring has the advantages of sound insulation and noiselessness during operation. In fact, other types of springs can also be considered for use according to specific circumstances.

[0039] Preferably, an arc extinguishing device is provided in the arc extinguishing area 5, an arc extinguishing channel is provided between the static contact 4 and the arc extinguishing device, one end of the arc extinguishing channel is connected to the static contact 4, and the other end is connected to the arc extinguishing device. Such a structural design, by providing an extinguishing channel and an arc extinguishing device, has the effect of arc striking and arc extinguishing, so that the arc generated after the static contact is energized can be extinguished in time. In fact, it is also possible to consider adding an arc striking part according to specific circumstances, which is dedicated to guiding the arc into the arc extinguishing device.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A single-contact conductive device for controlling and protecting a switch, characterized in that: The invention comprises a contact support and a housing (1), wherein the housing (1) is composed of a first housing (1A) and a second housing (1B), wherein a push rod (2), a circuit breaker module (3), a stationary contact (4), an arc extinguishing zone (5), a moving contact, an instrument component, a main rotating shaft, a main contact spring and a slide groove (8) are arranged in the contact support, wherein the push rod (2) is arranged in the middle of the housing (1), wherein the slide groove (8) is arranged at the bottom of the push rod (2), wherein the slide groove (8) is slidably connected to the push rod (2), wherein one end of the stationary contact (4) is fixedly connected to the second housing (1B), and the other end is in contact with the first housing (1A), wherein a plurality of clamping parts (9) are also arranged in the first housing (1A), wherein the clamping parts (9) are fixedly connected to the second housing (1B); The single-contact conductive device is provided with a control circuit. When the control circuit is energized and attracted, the main rotating shaft rotates, and the compressed main contact spring drives the contact support to move upward through the reaction force. One end of the moving contact is fixed by the instrument component, and the other end is used to rotate until the static contact (4) is closed and the circuit is connected. When the control circuit is powered off, the main rotating shaft is pressed downward by the action of the main contact spring, driving the contact support to move downward, and the moving contact fixed at one end rotates under the moving contact support, causing the moving contact and the stationary contact (4) to separate, thereby disconnecting the main circuit.

2. The single-contact conductive device of the control and protection switch according to claim 1, characterized in that: A reset portion is also provided in the housing (1), and the reset portion is arranged at the bottom of the slide groove (8).

3. The single-contact conductive device of the control and protection switch according to claim 1, characterized in that: It also comprises a limiting portion (7), wherein the limiting portion (7) is arranged in the first housing (1A), and the first housing (1A) fixes the circuit breaker module (3) via the limiting portion.

4. The single-contact conductive device of the control and protection switch according to claim 2, characterized in that: The reset portion is an elastic element.

5. The single-contact conductive device of the control and protection switch according to claim 4, characterized in that: The elastic element may be a rubber spring or a coil spring.

6. The single-contact conductive device of the control and protection switch according to claim 1, characterized in that: An arc extinguishing device is provided in the arc extinguishing zone (5), an arc extinguishing channel is provided between the static contact (4) and the arc extinguishing device, one end of the arc extinguishing channel is connected to the static contact (4), and the other end is connected to the arc extinguishing device.

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