CN210575702U

CN210575702U - Load switch

Info

Publication number: CN210575702U
Application number: CN201921634936.4U
Authority: CN
Inventors: 李季
Original assignee: Zhuhai Wharton Electric Co ltd
Current assignee: Zhuhai Wharton Electric Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-05-19
Anticipated expiration: 2029-09-27

Abstract

The utility model relates to the technical field of power control, in particular to a load switch, including static contact, arc extinguishing mechanism and the moving contact that is connected with actuating mechanism, the moving contact includes the contact board, two of the clearance setting of contact board, be provided with the pressure components between two contact boards, actuating mechanism can drive two contact boards to be close to and respectively press the both sides face of static contact, the arc extinguishing mechanism sets up on the moving path that the moving contact is kept away from the static contact relatively; the utility model discloses load switch's moving contact adopts the structure of the contact board that two clearances set up, guarantees through compressing tightly the subassembly that two contact boards compress tightly the both sides face of static contact respectively, guarantees that the contact is good between moving contact and the static contact, guarantees the electrically conductive effect of contact.

Description

Load switch

Technical Field

The utility model relates to a power control technical field, in particular to load switch.

Background

At present, a load switch of a gas insulation ring main unit is generally provided with an arc extinguish chamber to extinguish electric arcs between a moving contact and a static contact in the switching operation so as to ensure the operation safety of electrical equipment, but most of the existing load switches have the problem that the conductive effect of a contact is difficult to ensure after repeated opening and closing.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solve the technical scheme that above-mentioned problem adopted and provide a load switch, including static contact, arc extinguishing mechanism and be connected with actuating mechanism's moving contact, the moving contact is including the contact board, two of the gapped setting of contact board are provided with between two contact boards and compress tightly the subassembly, and actuating mechanism can order about two contact boards and be close to and crimping the both sides face of static contact respectively, and arc extinguishing mechanism sets up on the motion route of static contact is kept away from relatively to the moving contact.

As a further improvement of the above scheme, two support arms are arranged at one end of the contact plate, which is in pressure contact with the fixed contact, and contact protrusions are respectively arranged on the two support arms.

As a further improvement of the above, the hold-down assembly has at least two spaced apart contact plates.

As a further improvement of the scheme, the driving mechanism is hinged with a connecting block, and the pressing component presses the two contact plates and fixes the connecting block in the area between the two contact plates.

As a further improvement of the scheme, the compression assembly comprises a compression bolt capable of penetrating through the two contact plates, an elastic piece arranged between the compression bolt and the contact plates and a compression nut.

As a further improvement of the scheme, a pressing gasket is arranged between the contact plate and the elastic piece, and a pressing groove capable of containing the pressing gasket is arranged on the contact plate.

As a further improvement of the scheme, the moving contact is hinged with a conductive block, a spherical groove is formed in the conductive block, and a spherical protrusion which can be inserted into the spherical groove is arranged on the contact plate.

As a further improvement of the above scheme, the arc extinguishing mechanism includes a mounting base, and a first arc extinguishing piece and a second arc extinguishing piece respectively disposed on the mounting base, the first arc extinguishing piece is disposed in an area between the second arc extinguishing piece and the stationary contact, and an opening distance of the first arc extinguishing piece is smaller than an opening distance of the second arc extinguishing piece.

Compared with the prior art, the beneficial effects of the utility model are that: firstly, the moving contact of the load switch of the utility model adopts the structure of two contact plates arranged in a gap, and the pressing components ensure that the two contact plates respectively press the two side surfaces of the static contact, ensure good contact between the moving contact and the static contact and ensure the conductive effect of the contact;

secondly, the utility model discloses an it is articulated mutually with the mode that the sphere arch contacted that adopts the sphere recess between moving contact and the conducting block, also can the stable contact when guaranteeing the relative conducting block of moving contact and rotating, guarantees the electrically conductive effect between moving contact and the conducting block.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the described figures are only some embodiments of the invention, not all embodiments, and other designs and figures can be obtained by those skilled in the art without inventive effort, based on these figures:

fig. 1 is a schematic structural diagram of a load switch of the present invention;

fig. 2 is a right side view of the load switch of the present invention;

fig. 3 is an exploded view of the moving contact according to the present invention;

fig. 4 is a schematic structural diagram of an arc extinguishing mechanism of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.

As shown in fig. 1 and 2, a load switch includes a bracket 1, a fixed contact 2, an arc extinguishing mechanism 5, and a movable contact 3 connected with a driving mechanism 4, where the fixed contact 2 and the driving mechanism 4 are respectively and fixedly mounted on the bracket 1, the arc extinguishing mechanism 5 is disposed on the fixed contact 2, the movable contact 3 is hinged to the driving mechanism 4, the driving mechanism 4 is fixedly disposed on the bracket 1, the driving mechanism 4 can drive the movable contact 3 to approach and contact the fixed contact 2 or to be away from the fixed contact 2, the arc extinguishing mechanism 5 is disposed on a motion path of the movable contact 3 relatively far from the fixed contact 2, the movable contact 3 includes two contact plates 31 disposed at a gap and a pressing assembly 6 for pressing the two contact plates 31, a conductive block 11 is fixedly disposed on the bracket 1, the two contact plates 31 are respectively disposed on two sides of the conductive block 11, and further, the pressing assemblies 6 are disposed on two ends of the two contact, one end of each of the two contact plates 31 is hinged to the corresponding conductive block 11 through the pressing assembly 6, and when the moving contact 3 rotates relative to the corresponding conductive block 11 to contact the corresponding static contact 2, the corresponding static contact 2 can be inserted into a position between the two contact plates 31, namely the two contact plates 31 can be respectively pressed on two sides of the corresponding static contact 2.

As a further improvement of the above solution, as shown in fig. 3, one end of the contact plate 31, which is opposite to the pressure contact fixed contact 2, is provided with two arms, the two arms are respectively provided with a contact protrusion 32, and the contact plate 31 is in pressure contact with the fixed contact 2 through the contact protrusion 32, so as to avoid that the movable contact 3 and the fixed contact 2 only contact with a part due to uneven contact surfaces when contacting, and prevent the movable contact 3 and the fixed contact 2 from contacting poorly.

As a further improvement of the above scheme, as shown in fig. 2 and fig. 3, the driving mechanism 4 is hinged to a connecting block 43, and the pressing assembly 6 presses the two contact plates 31 and fixes the connecting block 43 in a region between the two contact plates 31, specifically, the driving mechanism 4 includes a rotating shaft 41, a hinge rod 42 and the connecting block 43, which are hinged in sequence, and the rotating shaft 41 can be driven to rotate manually or by using a rotation source to push the connecting block 43 to move, so that the movable contact 3 rotates relative to the hinge point of the movable contact and the conductive block 11 to approach or leave the stationary contact 2, the connecting block 43 and the contact plates 31 are directly provided with at least two connecting points, which may be common pin shafts, and the connecting block 43 presses the two contact plates 31 through the pressing assembly 6 and fixes the connecting block 43 between the two contact plates 31, thereby facilitating assembly and reducing assembly.

As a further improvement of the above scheme, as shown in fig. 3, the pressing assembly 6 includes a pressing bolt 61 capable of penetrating through the two contact plates 31, an elastic member 62 and a pressing nut 63 which are arranged between the pressing bolt 61 and the contact plates 31, the elastic member 62 may be a commonly used spring, further, a sleeve 64 is further arranged at one end of the movable contact 3, which is in pressure contact with the fixed contact 2, and the length of the sleeve 64 is smaller than the thickness of the fixed contact 2, that is, the pressing assembly 6 can press the two contact plates 31 at two ends of the sleeve 64, and the two contact plates 31 keep a relatively close pre-pressing trend or pre-pressing force, so as to ensure that the contact plates 31 can be always in pressure contact with the fixed contact 2, ensure that the movable contact 3 and the fixed contact 2 are in good contact, and ensure that the contacts.

As a further improvement of the above solution, as shown in fig. 3, a pressing pad 66 is disposed between the contact board 31 and the elastic element 62, and a pressing groove capable of receiving the pressing pad 66 is disposed on the contact board 31, which aims to ensure the pressing stability between the pressing assembly 6 and the contact board 31.

As a further improvement of the above scheme, as shown in fig. 3, the conductive block 11 is provided with a spherical groove 12, and the contact board 31 is provided with a spherical protrusion 65 that can be inserted into the spherical groove 12, that is, when the contact board 31 and the conductive block 11 rotate relatively, the spherical protrusion 65 is accommodated in the spherical groove 12, so that the contact board 31 and the conductive block 11 are always in large-area contact, and poor contact is avoided.

As a further improvement of the above solution, as shown in fig. 4, the arc extinguishing mechanism 5 includes a mounting base 51, a first arc extinguishing piece 52 and a second arc extinguishing piece 53 respectively disposed on the mounting base 51, specifically, two side arms are disposed on the arc extinguishing piece, a distance between the two side arms is called an opening distance, the opening distance of the first arc extinguishing piece 52 is smaller than the opening distance of the second arc extinguishing piece 53, and the first arc extinguishing piece 52 is disposed in an area between the second arc extinguishing piece 53 and the fixed contact 2, that is, during opening operation, the movable contact 3 rotates along a hinge point between the movable contact 3 and the conductive block 11 and is away from the fixed contact 2, the movable contact 3 first passes through the first arc extinguishing piece 52 and then passes through the second arc extinguishing piece 53, which aims at generating concentrated arc when the movable contact 3 and the fixed contact 2 are just separated, at this time, the first arc extinguishing piece 52 with small opening distance can well attract arc, after the moving contact 3 and the static contact 2 are separated by a distance, the arc is gradually split and dispersed and exceeds the optimal arc extinguishing range of the first arc extinguishing piece 52 with a small opening, and at the moment, the second arc extinguishing piece 53 with a large opening distance can improve the arc extinguishing effect.

Above, only the preferred embodiment of the present invention has been described, the present invention is not limited to the above embodiment, and the technical effects of the present invention can be achieved by the same means, which all belong to the protection scope of the present invention.

Claims

1. The utility model provides a load switch, its characterized in that, including static contact (2), arc extinguishing mechanism (5) and be connected with moving contact (3) of actuating mechanism (4), moving contact (3) are including contact board (31), two of gapped setting in contact board (31), are provided with between two contact boards (31) and compress tightly subassembly (6), and actuating mechanism (4) can drive two contact boards (31) and be close to and respectively the both sides face of crimping static contact (2), and arc extinguishing mechanism (5) set up on the motion path of moving contact (3) keeping away from static contact (2) relatively.

2. A load switch according to claim 1, characterized in that the contact plate (31) is provided with two arms opposite to the end for pressing against the stationary contact (2), and the two arms are respectively provided with a contact protrusion (32).

3. A load switch according to claim 1, characterized in that the hold-down assembly (6) has at least two at the ends of the contact plate (31).

4. A load switch according to claim 1, characterized in that the actuating mechanism (4) is hinged with a connecting block (43), and the pressing assembly (6) presses the two contact plates (31) and fixes the connecting block (43) in the area between the two contact plates (31).

5. A load switch according to claim 1, characterized in that the hold-down assembly (6) comprises a hold-down bolt (61) which can be passed through the two contact plates (31), an elastic element (62) arranged between the hold-down bolt (61) and the contact plates (31), and a hold-down nut (63).

6. A load switch according to claim 5, characterized in that a pressure washer (66) is arranged between the contact plate (31) and the elastic element (62), and the contact plate (31) is provided with a pressure groove capable of accommodating the pressure washer (66).

7. A load switch according to claim 1, characterized in that said movable contact (3) is hinged with a conductive block (11), said conductive block (11) is provided with a spherical recess (12), and said contact plate (31) is provided with a spherical protrusion (65) capable of being inserted into the spherical recess (12).

8. The load switch according to claim 1, wherein the arc extinguishing mechanism (5) comprises a mounting base (51), a first arc extinguishing piece (52) and a second arc extinguishing piece (53) which are respectively arranged on the mounting base (51), the first arc extinguishing piece (52) is arranged in an area between the second arc extinguishing piece (53) and the fixed contact (2), and the opening distance of the first arc extinguishing piece (52) is smaller than that of the second arc extinguishing piece (53).