CN219246576U

CN219246576U - Surface contact switch matched with low-voltage knife switch

Info

Publication number: CN219246576U
Application number: CN202320348890.XU
Authority: CN
Inventors: 刘二亮; 马国森
Original assignee: Hebei Mengda Electrical Equipment Co ltd
Current assignee: Hebei Mengda Electrical Equipment Co ltd
Priority date: 2023-03-01
Filing date: 2023-03-01
Publication date: 2023-06-23
Anticipated expiration: 2033-03-01

Abstract

The utility model discloses a surface contact switch matched with a low-voltage knife switch, which comprises the following components: the knife switch comprises a base, a first support porcelain bottle is fixedly connected to the top end of the base, a static touch plate is fixedly connected to the top end of the first support porcelain bottle, a locating plate is fixedly connected to the surface of the static touch plate, a rotating shaft is movably connected to the inside of the locating plate, and a touch knife is connected to the surface of the rotating shaft in a rotating mode. According to the utility model, the contact knife is contacted with the outer side of the conductive part of the movable contact plate in a rotating fit way around the rotating shaft under the limiting action of the positioning plate, so that the electric contact performance between the contact knife and the movable contact plate is obviously improved, the contact knife and the movable contact plate truly have a conductive surface contact state, closing operation is completed, otherwise, the opening operation is carried out by pulling up the split locking pull buckle, and the abrasion condition of the pull-in knife switch can be fully reduced and the short circuit or overload protection effect can be reflected in the normal use of the whole low-voltage knife switch.

Description

Surface contact switch matched with low-voltage knife switch

Technical Field

The utility model relates to the technical field of low-voltage knife switches, in particular to a surface contact switch matched with a low-voltage knife switch.

Background

As is well known, low voltage switches are one of the most used and most important electrical devices in low voltage distribution systems, and are mainly used for isolating, converting, switching on and switching off circuits, wherein the knife switch can only break small load current, and the most used knife isolating switch has obvious breaking points when being broken and is manually operated, so that certain safety problems can exist.

However, in the prior art, when in actual use, some low-voltage knife switches are generally opened, cannot be operated under load without arc extinguishing chambers, and are only used as isolating switches, so that a low-voltage knife switch with a fuse is provided for operation in order to protect a circuit from accidents.

Disclosure of Invention

The utility model aims to provide a surface contact switch matched with a low-voltage knife switch, so as to solve the problem that the low-voltage knife switch in the prior art is only used as an isolating switch, and short circuit or overload accidents are easy to occur due to abrasion of a pull-in knife switch.

In order to achieve the above purpose, the present utility model provides the following technical solutions: comprising the following steps:

the knife switch is characterized by comprising a base, wherein a first support porcelain bottle is fixedly connected to the top end of the base, a static contact plate is fixedly connected to the top end of the first support porcelain bottle, a static contact is connected to one end of the static contact plate through threads, a wire outlet post is fixedly connected to one end of the static contact plate, a positioning plate is fixedly connected to the surface of the static contact plate, a baffle plate is fixedly connected to the side face of the positioning plate, a rotating shaft is movably connected to the inside of the positioning plate, a touch knife is connected to the surface of the rotating shaft in a rotating mode, an insulating block is fixedly connected to the middle of the touch knife, a current fuse is fixedly connected to the side face of the touch knife through the threads, a metal sheet is fixedly connected to the top end of the touch knife, and a locking pull buckle is fixedly connected to one end of the touch knife, which is far away from the position of the static contact plate.

Preferably, the material of the base is hot dip galvanizing, and the surface of the base is provided with through holes.

Preferably, the top of base fixedly connected with second support vase, the top fixedly connected with movable contact plate of second support vase.

Preferably, one end of the movable contact plate is in threaded connection with a movable contact, and one end of the movable contact plate, which is far away from the position of the movable contact, is fixedly connected with a wire inlet column through a bolt.

Preferably, the material of the contact knife, the static contact plate and the movable contact plate is high-purity red copper subjected to hot galvanizing treatment.

Preferably, the materials of the first bracket porcelain bottle and the second bracket porcelain bottle are wear-resistant, oxidation-resistant and high-strength ceramics.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model uses the locking state when the contact knife is switched on: under the limiting action of the positioning plate, the contact knife rotates around the rotating shaft to be in contact with the outer side of the conductive part of the movable contact plate in a rotating fit manner, so that the electric contact performance between the contact knife and the movable contact plate is obviously improved, the contact knife and the movable contact plate really have a conductive surface contact state, the switching-on operation is finished, and the switching-off and switching-off operation is finished: the split locking pull buckle is pulled upwards, the split locking pull buckle drives the contact knife to act so as to separate from the outer side of the conductive part of the movable contact plate, and the contact knife cannot rotate to collide with the static contact plate under the action of the baffle plate, so that the opening operation is completed, in addition, the connection of the current fuse piece on the contact knife can be melted to generate protection when a short circuit state or overload abnormality occurs, and further the abrasion condition of the pull-in knife switch can be fully reduced and the effect of short circuit or overload protection can be reflected in the normal use of the whole low-voltage knife switch.

2. The utility model also ensures that the movable contact and the fixed contact are well contacted by installing and fixing the base at a position convenient to operate and vertically installing the base, then uniformly adjusts the distance between the movable contact and the pressing plates at two sides, and ensures that the contact surface is pressed after the contact knife is closed, wherein the center lines of the contact knife and the fixed contact are on the same plane and cannot swing back and forth, and after the wiring is finished, the current fuse piece of the inspection fuse assembly is not damaged and is reliably fixed, and finally the fuse assembly is safely used in a good environment.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a face contact switch of the utility model in combination with a low voltage knife switch;

FIG. 2 is a front view of the whole structure of a surface contact switch matched with a low-voltage knife switch;

FIG. 3 is a side view of the whole structure of a surface contact switch matched with a low-voltage knife switch;

fig. 4 is a top view of the whole structure of the surface contact switch matched with the low-voltage knife switch.

In the figure: 1. a base; 2. a first bracket porcelain bottle; 3. a second bracket porcelain bottle; 4. a stationary contact; 5. a positioning plate; 6. a wire outlet post; 7. a rotating shaft; 8. a metal sheet; 9. an insulating block; 10. a current fuse; 11. a contact knife; 12. opening and closing locking pull buckle; 13. a moving contact; 14. a wire inlet column; 15. a stationary touch plate; 16. a movable contact plate; 17. a baffle.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: comprising the following steps:

the knife switch integrally comprises a base 1, a through hole is formed in the surface of the base 1 for installing and fixing the whole low-voltage knife switch, hot galvanizing is more firm and durable in material selection, the service life is longer, a first bracket porcelain bottle 2 and a second bracket porcelain bottle 3 are fixedly connected to the top end of the base 1 for supporting and insulating, meanwhile, a high-strength ceramic material is adopted to be more wear-resistant, oxidation-resistant and durable, a static contact plate 15 is fixedly connected to the top end of the first bracket porcelain bottle 2, a movable contact plate 16 is fixedly connected to the top end of the second bracket porcelain bottle 3, a static contact 4 is in threaded connection with one end of the static contact plate 15, a movable contact 13 is in threaded connection with one end of the movable contact plate 16, one end of the static contact plate 15, which is far away from the position of the static contact 4, is fixedly connected with a wire outlet column 6 through a bolt for outwards wiring, one end of the movable contact plate 16, which is far away from the position of the movable contact 13, is fixedly connected with a wire inlet column 14 through the bolt, the utility model is used for inward wiring, the surface of the static contact plate 15 is fixedly connected with the locating plate 5, the side surface of the locating plate 5 is fixedly connected with the baffle 17, the inside of the locating plate 5 is movably connected with the rotating shaft 7, the contact blade 11 is used for rotating around the shaft on the locating plate 5 and meeting the baffle 17 to prevent the contact blade from rotating to 180 degrees so as to generate collision, the surface of the rotating shaft 7 is rotationally connected with the contact blade 11, wherein the static contact plate 15, the movable contact plate 16 and the contact blade 11 are all made of high-quality red copper materials, the cost is reduced, rust and corrosion are not easy, the potential safety hazard is reduced, the middle of the contact blade 11 is fixedly connected with the insulating block 9, the side surface of the contact blade 11 is fixedly connected with the current fuse 10 through bolts, the top surface of the contact blade 11 is fixedly connected with the metal sheet 8, one end of the contact blade 11 far away from the position of the static contact plate 15 is fixedly connected with the opening and closing locking pull buckle 12, and the opening and closing operation of the contact blade 11 is used, the contact blade 11 is in direct contact with the outer side of the conductive part of the movable contact plate 16 under the direct action of enough elastic pressure, so that the electric contact performance between the contact blade 11 and the movable contact plate 16 is obviously improved, the contact blade 11 and the movable contact plate 16 really have a conductive surface contact state, and further, the opening and closing operations are more reliable and safer.

Working principle: when the fuse assembly is used, the fuse assembly is installed and fixed at a position convenient to operate through the base 1, the movable contact 13 and the fixed contact 4 are vertically installed, the contact between the movable contact 13 and the fixed contact 4 is guaranteed to be good, then the distance between the movable contact 13 and pressing plates on two sides is uniformly adjusted, the contact surface is guaranteed to be pressed after the contact blade 11 is closed, the central lines of the contact blade 11 and the fixed contact 4 are on the same plane and cannot swing back and forth, through wiring of the wire inlet column 14 and the wire outlet column 6, the current fuse 10 of the fuse assembly is checked after wiring is finished, the fuse assembly is not damaged, the fuse assembly is reliably fixed, and the fuse assembly is locked when the contact blade 11 is closed: under the limiting action of the positioning plate 5, the contact blade 11 is in rotating fit contact with the outer side of the conductive part of the movable contact plate 16 around the rotating shaft 7, so that the electrical contact performance between the contact blade 11 and the movable contact plate 16 is obviously improved, and the contact blade 11 and the movable contact plate 16 really have a conductive surface contact state, and the switching-on operation and the switching-off operation are completed: the opening and closing locking pull buckle 12 is pulled upwards, the opening and closing locking pull buckle 12 drives the contact knife 11 to act so as to separate from the outer side of the conductive part of the movable contact plate 16, and the contact knife cannot rotate to 180 degrees to collide with the static contact plate 15 under the action of the baffle plate 17, so that opening operation is completed, in addition, the connection of the current fuse piece 10 on the contact knife 11 can be melted to generate protection when a short circuit state or overload abnormality occurs, and the abrasion condition of the opening and closing knife switch can be fully reduced and the efficacy of short circuit or overload protection can be reflected in normal use of the whole low-voltage knife switch.

It is noted that relational terms such as front and back, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A face touch switch cooperates with a low-voltage knife switch, which is characterized in that: comprising the following steps:

knife switch is whole, knife switch is whole including base (1), the top fixedly connected with first support vase (2) of base (1), the top fixedly connected with static contact plate (15) of first support vase (2), the one end threaded connection of static contact plate (15) has static contact (4), the one end that static contact plate (15) kept away from static contact (4) position is through bolt fixedly connected with play line post (6), the fixed surface of static contact plate (15) is connected with locating plate (5), the side fixedly connected with separation blade (17) of locating plate (5), the inside swing joint of locating plate (5) has axis of rotation (7), the surface rotation of axis of rotation (7) is connected with touch sword (11), the centre fixedly connected with insulating piece (9) of touch sword (11), the side of touch sword (11) is through bolt fixedly connected with electric current fuse (10), the top fixedly connected with sheetmetal (8) of touch sword (11), the fixed surface of touch sword (11) is kept away from the fixed surface of touch sword (15) and is connected with and closes the fixed knot of position (12).

2. A face-contacting switch cooperating with a low voltage knife switch as claimed in claim 1, wherein: the base (1) is made of hot dip galvanizing, and through holes are formed in the surface of the base (1).

3. A face-contacting switch cooperating with a low voltage knife switch as claimed in claim 1, wherein: the top of base (1) fixedly connected with second support vase (3), the top fixedly connected with movable contact plate (16) of second support vase (3).

4. A face-contacting switch cooperating with a low voltage knife switch as claimed in claim 3, wherein: one end of the movable contact plate (16) is in threaded connection with a movable contact (13), and one end of the movable contact plate (16) away from the position of the movable contact (13) is fixedly connected with a wire inlet column (14) through a bolt.

5. A face-contacting switch cooperating with a low voltage knife switch as claimed in claim 1, wherein: the contact knife (11), the static contact plate (15) and the movable contact plate (16) are made of hot galvanizing high-purity red copper.

6. A face-contacting switch cooperating with a low voltage knife switch as claimed in claim 1, wherein: the first support porcelain bottle (2) and the second support porcelain bottle (3) are made of wear-resistant, oxidation-resistant and high-strength ceramics.