CN220171989U

CN220171989U - Contact unit

Info

Publication number: CN220171989U
Application number: CN202321637333.6U
Authority: CN
Inventors: 蒋家鹏; 顾哲; 龚锐; 李闯; 秦志凯
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-12-12
Anticipated expiration: 2033-06-26

Abstract

The contact unit comprises a shell, a contact mechanism and an arc extinguishing system, wherein the contact mechanism is assembled in the middle of the shell, an arc inlet of the arc extinguishing system corresponds to the contact mechanism, the arc extinguishing system comprises an arc extinguishing chamber, the arc extinguishing system further comprises a buffer zone, the buffer zone is provided with a plurality of stand columns which are arranged at intervals, and the stand columns are opposite to an exhaust hole of the arc extinguishing chamber. According to the contact unit, the buffer zone of the arc extinguishing system is provided with the plurality of upright posts, the high-temperature tail gas discharged from the exhaust hole is buffered by the plurality of upright posts and does not need to be discharged out of the shell, and the shell can be provided with no exhaust port additionally, so that the use safety of the contact unit is prevented from being influenced by the discharged high-temperature gas.

Description

Contact unit

Technical Field

The utility model relates to the field of switching appliances, in particular to a contact unit.

Background

With the rapid development of the ac/dc electrical appliance industry, rotary isolating switches have been widely used. The isolating switch is a switching device with isolating function and switching function, in the traditional rotary isolating switch, an arc extinguishing system matched with a contact mechanism is arranged in the isolating switch, an arc generated by the contact mechanism is extinguished by the arc extinguishing system, high-temperature tail gas generated by the arc extinguishing system is discharged through an exhaust port arranged on the side wall of the shell, and the high-temperature gas discharged out of the shell easily causes local overhigh temperature, influences the normal use of adjacent equipment and is unfavorable for guaranteeing the safety.

Disclosure of Invention

The utility model aims to overcome at least one defect of the prior art and provide the contact unit which has a simple structure and high reliability and does not need to discharge tail gas.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a contact unit which comprises a shell, a contact mechanism and an arc extinguishing system, wherein the contact mechanism is assembled in the middle of the shell, an arc inlet of the arc extinguishing system corresponds to the contact mechanism, the arc extinguishing system comprises an arc extinguishing chamber, the arc extinguishing system further comprises a buffer zone, the buffer zone is provided with a plurality of stand columns which are arranged at intervals, and the stand columns are opposite to an exhaust hole of the arc extinguishing chamber.

Preferably, the plurality of upright posts are arranged in at least two rows, and the upright posts in two adjacent rows are arranged in a staggered manner.

Preferably, a baffle is arranged in the shell, the baffle is arranged on the outer side of the arc extinguishing chamber in a surrounding mode, and a buffer area is formed between the baffle and the exhaust hole.

Preferably, the protruding height of the upright post is smaller than the height of the baffle plate.

Preferably, a limiting plate is further arranged in the shell, the limiting plate surrounds and is attached to the outer side of the contact mechanism, and the limiting plate is connected with the baffle.

Preferably, a pair of limiting plates and two pairs of baffle plates are arranged in the shell, the pair of limiting plates are positioned between the two pairs of baffle plates, the interval between each pair of baffle plates is larger than the interval between the pair of limiting plates, and one end of each baffle plate deflects towards the limiting plates and is connected with the limiting plates.

Preferably, each baffle comprises a straight section and a connecting section, the distance between the two straight sections of each pair of baffles is larger than the distance between the pair of limiting plates, and each connecting section is obliquely connected between the straight section and one limiting plate.

Preferably, each arc extinguishing system comprises two buffer areas, and the arc extinguishing chambers are correspondingly arranged between the two buffer areas.

Preferably, the explosion chamber includes the explosion chamber, the one end of explosion chamber is equipped with into the arc mouth, the buffer is located the outer relative both sides of explosion chamber, be provided with two bars piece group in the explosion chamber, every bars piece group is adjacent with a buffer, and the exhaust hole has been seted up to the explosion chamber lateral wall that is located between buffer and the bars piece group.

Preferably, the arc extinguishing system comprises two arc extinguishing chambers, wherein the two arc extinguishing chambers are positioned between the two buffer areas, each arc extinguishing chamber comprises an arc extinguishing chamber, one end of each arc extinguishing chamber is provided with an arc inlet, a grid sheet group is arranged in each arc extinguishing chamber, and the side wall of each arc extinguishing chamber positioned between the buffer area and the grid sheet group is provided with an exhaust hole.

Preferably, the grid sheet group comprises a plurality of arc-extinguishing grid sheets which are arranged at intervals, arc-extinguishing gaps are formed between two adjacent arc-extinguishing grid sheets, and at least part of arc-extinguishing gaps correspond to the exhaust holes; an arc-extinguishing gap is formed in the edge of one end of each arc-extinguishing gate sheet, all arc-extinguishing gaps are communicated to form arc-extinguishing grooves, and the arc-extinguishing grooves of the two gate sheet groups are opposite.

According to the contact unit, the buffer zone of the arc extinguishing system is provided with the plurality of upright posts, the high-temperature tail gas discharged from the exhaust hole is buffered by the plurality of upright posts and does not need to be discharged out of the shell, and the shell can be provided with no exhaust port additionally, so that the use safety of the contact unit is prevented from being influenced by the discharged high-temperature gas.

In addition, the columns of two adjacent rows are arranged in a staggered manner, so that the buffer effect of the columns can be further improved in a limited space, and the buffer area can be reduced.

In addition, the baffle surrounds the outer side of the arc extinguish chamber, so that a buffer area is formed between the baffle and the exhaust hole, high-temperature tail gas is limited in the buffer area, particularly, the protruding height of the baffle is higher than that of the stand column, the high-temperature tail gas is prevented from overflowing from the buffer area to the gas space in the shell, the stand column is fully utilized, and the influence on other parts in the shell is reduced.

Drawings

FIG. 1 is a schematic view of the structure of a contact unit in the present utility model;

FIG. 2 is a schematic view showing an exploded structure of a contact unit in the present utility model;

FIG. 3 is a schematic view of the structure of the housing of the present utility model;

FIG. 4 is a schematic view of the structure of the grid set according to the present utility model;

reference numerals:

the device comprises an a-contact mechanism, a 1-moving contact assembly, a 2-static contact assembly, a 40-arc-extinguishing chamber, a 41-grid sheet set, a 410-arc-extinguishing groove, 411-arc-extinguishing grid sheets, 412-arc-extinguishing gaps, 423-exhaust holes, 45-buffer areas, 451-upright posts, 5-shells, 52-baffle plates, 521-straight sections, 522-connecting sections and 53-limiting plates.

Detailed Description

Specific embodiments of the contact unit according to the utility model are further described below with reference to the examples given in the figures. The contact unit of the present utility model is not limited to the description of the following embodiments.

The isolating switch comprises an operating module and a contact module which are arranged in a stacked mode, the contact module comprises at least one contact unit, two adjacent contact units are connected in a linkage mode, and the operating mechanism of the operating module drives the at least one contact unit to switch on or switch off.

Specifically, as shown in fig. 1 and 2, each contact unit includes a housing 5, a contact mechanism a and an arc extinguishing system are disposed in the housing 5, wherein the contact mechanism a is disposed in the middle of the housing 5, the contact mechanism a includes a moving contact assembly 1 and a pair of fixed contact assemblies 2, each fixed contact assembly 2 is connected with a wiring assembly, the moving contact assembly 1 rotates between the pair of fixed contact assemblies 2 and is used for switching on or switching off a main circuit in each contact unit, the moving contact assembly 1 includes a rotating shaft and a pair of moving contact parts disposed in the rotating shaft, the rotating shaft is rotatably disposed between the pair of fixed contact assemblies 2, a moving contact bridge is disposed in the rotating shaft, two ends of the moving contact bridge are respectively used as moving contact parts, each moving contact part extends out of the rotating shaft along the radial direction of the rotating shaft, and is driven to rotate along with the rotating shaft so that each moving contact part is respectively contacted with or separated from one fixed contact assembly 2; the adjacent two contact units are connected in a linkage way through the rotating shaft, so that synchronous switching-on and switching-off of the contact mechanisms a in all the contact units are realized; the arc extinguishing system is matched with one side of the contact mechanism a and is used for extinguishing an arc generated when the contact mechanism a is opened, an arc inlet of the arc extinguishing system corresponds to the contact mechanism a, the arc extinguishing system comprises an arc extinguishing chamber 40, the arc extinguishing chamber 40 is matched with one side of the contact mechanism a, the arc entering from the arc inlet is cut and extinguished by the arc extinguishing chamber 40, and tail gas is discharged from an exhaust hole 423 of the arc extinguishing chamber 40.

The improvement point of the utility model is that the arc extinguishing system further comprises a buffer zone 45, the buffer zone 45 is provided with a plurality of stand columns 451 which are arranged at intervals, the stand columns 451 are opposite to the exhaust holes 423 of the arc extinguishing chamber 40, so that the high-temperature tail gas discharged from the exhaust holes 423 of the arc extinguishing chamber 40 is buffered by the plurality of stand columns 451 and then is not required to be discharged out of the shell 5, an exhaust port is not required to be additionally arranged on the shell, and the use safety of the shell can be prevented from being influenced by the discharged high-temperature gas.

Preferably, the plurality of columns 451 are arranged in at least two rows, and the columns 451 in adjacent two rows are offset and opposite, so that the cushioning effect can be further improved in a limited space, and the area of the cushioning region 45 can be reduced.

Further, a baffle plate 52 is further arranged in the shell 5, the baffle plate 52 surrounds the outer side wall of the arc extinguishing chamber 40, the baffle plate 52 is opposite to the exhaust holes 423 of the arc extinguishing chamber 40 at intervals, a buffer zone 45 is formed in the shell 5 space between the baffle plate 52 and the exhaust holes 423, preferably, the protruding height of the baffle plate 52 is larger than that of the stand column 451, high-temperature tail gas is prevented from overflowing from the buffer zone 45 to the gas space in the shell 5, the stand column 451 is fully utilized, and the influence on other components in the shell 5 is reduced.

A specific embodiment of a contact unit is provided in connection with fig. 1-4.

As shown in fig. 1-3, the contact unit includes a housing 5, a contact mechanism a is disposed in the middle of the housing 5, the contact mechanism a includes a moving contact assembly 1 and a pair of fixed contact assemblies 2, where the moving contact assembly 1 is rotatably disposed between the pair of fixed contact assemblies 2, the moving contact assembly 1 includes a rotating shaft and a moving contact bridge disposed in the rotating shaft, two ends of the moving contact bridge respectively serve as moving contact portions extending out of the rotating shaft along a radial direction of the rotating shaft, the fixed contact assembly 2 includes a conductive plate, one end of the conductive plate serves as a fixed contact portion for corresponding cooperation with the moving contact portion, and a wiring portion is disposed at the other end of the conductive plate for connecting with the outside.

Also provided in the housing 5 are arc extinguishing systems, preferably one on each side of the contact means a, as shown in fig. 1, 2, each arc extinguishing system comprising an arc extinguishing chamber 40 and a buffer zone 45, in this embodiment each arc extinguishing system comprising an arc extinguishing chamber 40 and two buffer zones 45, the arc extinguishing chamber 40 being located between the two buffer zones 45.

Specifically, the arc extinguishing chamber 40 includes the arc extinguishing chamber, the one end of arc extinguishing chamber is equipped with into the arc mouth, exhaust hole 423 has been seted up with the adjacent arc extinguishing chamber one side of arc mouth, be provided with two relative bars piece group 41 of interval in the arc extinguishing chamber, the arc extinguishing chamber space that is located between two bars piece group 41 is as running the arc passageway, run the arc passageway and go into the arc mouth intercommunication, every bars piece group 41 is adjacent with a buffer 45, exhaust hole 423 has been seted up to the arc extinguishing chamber lateral wall that is located between bars piece group 41 and the buffer 45, that is, exhaust hole 423 has been seted up with the adjacent arc extinguishing chamber lateral wall of arc mouth of entering.

As shown in fig. 4, each gate sheet group 41 includes a plurality of arc-extinguishing gate sheets 411 arranged at intervals, an arc-extinguishing gap is formed between two adjacent arc-extinguishing gate sheets 411, at least a part of the arc-extinguishing gap is correspondingly communicated with the exhaust hole 423, an arc-extinguishing gap 412 is formed at one end of each arc-extinguishing gate sheet 411, the arc-extinguishing gaps 412 of the same gate sheet group 41 are communicated to form an arc-extinguishing slot 410, the arc-extinguishing slot 410 faces the arc-running channel, one end of the arc-extinguishing slot 410 is communicated with the arc-entering opening, and the arc-extinguishing slots 410 of two gate sheet groups 41 are opposite at intervals.

As shown in fig. 1 and 3, the casing 5 is further provided with a baffle plate 52 and a limiting plate 53, the baffle plate 52 is disposed around the outer side of the arc extinguishing chamber 40, and the baffle plate 52 is opposite to the exhaust hole 423 of the arc extinguishing chamber 40 at intervals, at this time, a region between the baffle plate 52 and the exhaust hole 423 is used as a buffer area 45, the buffer area 45 is provided with a plurality of columns 451 arranged at intervals, preferably, the columns 451 are arranged in at least two rows, in fig. 1, the columns 451 are arranged in three rows, and the columns 451 in two adjacent rows are opposite in a staggered manner, so as to prolong the moving path of the tail gas in the buffer area 45, and make the tail gas sufficiently buffered; further, the protruding height of the stand column 451 is smaller than that of the baffle plate 52, so that the tail gas is prevented from overflowing from the buffer zone 45, other parts in the shell 5 are prevented from being influenced to work normally, and meanwhile, the tail gas is fully buffered and absorbed after multiple rebounds; the limiting plate 53 surrounds and is attached to the outer side of the contact mechanism a, and the limiting plate 53 is connected with the baffle plate 52.

Preferably, a pair of limiting plates 53 and two pairs of baffle plates 52 are arranged in the shell 5, the pair of limiting plates 53 are parallel and are arranged at two sides of the contact mechanism a at intervals, each limiting plate 53 is clung to one side of the contact mechanism a, in this embodiment, one end of each baffle plate 52 is deflected towards the direction close to the limiting plate 53 and is connected with the limiting plate 53, the two baffle plates 52 of the same pair are parallel and are arranged at intervals, each baffle plate 52 is parallel to the limiting plate 53, thus, after the baffle plates 52 are connected with the limiting plates 53, a relatively closed area can be divided in the middle of the shell 5, tail gas exhausted by the exhaust holes 423 is dissipated in the area, the situation that a plurality of side walls of the shell 5 are contacted with the tail gas to generate high temperature is avoided, the use safety is influenced, preferably, the interval between each pair of baffle plates 52 is larger than the interval between the pair of limiting plates 53, one end of each baffle plate 52 deflects towards the direction close to the limiting plate 53 and is connected with the limiting plate 53, as shown in fig. 3, each baffle plate 52 comprises a straight section 521 and a connecting section 522, the interval between two straight sections of each baffle plate 52 is larger than the interval between the pair of straight sections 53, and the contact mechanism 53 is connected with the contact mechanism, and the gap cannot be prevented from entering the relatively closed area 45 a, and is in particular, and the gap cannot be prevented from entering the gap between the whole gap mechanism and is formed between the straight section 53 and the contact mechanism.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. The contact unit comprises a shell (5), a contact mechanism (a) and an arc extinguishing system, wherein the contact mechanism (a) is assembled in the middle of the shell (5), an arc inlet of the arc extinguishing system corresponds to the contact mechanism (a), and the arc extinguishing system comprises an arc extinguishing chamber (40) and is characterized in that: the arc extinguishing system further comprises a buffer zone (45), wherein the buffer zone (45) is provided with a plurality of stand columns (451) which are arranged at intervals, and the stand columns (451) are opposite to the exhaust holes (423) of the arc extinguishing chamber (40).

2. The contact unit according to claim 1, wherein: the plurality of columns (451) are arranged in at least two rows, and the columns (451) in two adjacent rows are arranged in a staggered manner.

3. The contact unit according to claim 1, wherein: a baffle plate (52) is arranged in the shell (5), the baffle plate (52) is arranged on the outer side of the arc extinguishing chamber (40) in a surrounding mode, and a buffer area (45) is formed between the baffle plate (52) and the exhaust hole (423).

4. A contact unit according to claim 3, characterized in that: the protruding height of the stand column (451) is smaller than the height of the baffle plate (52).

5. A contact unit according to claim 3, characterized in that: the shell (5) is internally provided with a limiting plate (53), the limiting plate (53) surrounds and is attached to the outer side of the contact mechanism (a), and the limiting plate (53) is connected with the baffle plate (52).

6. The contact unit of claim 5, wherein: a pair of limiting plates (53) and two pairs of baffle plates (52) are arranged in the shell (5), the pair of limiting plates (53) are located between the two pairs of baffle plates (52), the interval between each pair of baffle plates (52) is larger than the interval between the pair of limiting plates (53), and one end of each baffle plate (52) deflects towards the limiting plate (53) and is connected with the limiting plate (53).

7. The contact unit of claim 6, wherein: each baffle plate (52) comprises a straight section (521) and a connecting section (522), the distance between the two straight sections (521) of each pair of baffle plates (52) is larger than the distance between the pair of limiting plates (53), and each connecting section (522) is obliquely connected between the straight section (521) and one limiting plate (53).

8. The contact unit according to claim 1, wherein: each arc extinguishing system comprises two buffer areas (45), and the arc extinguishing chambers (40) are correspondingly arranged between the two buffer areas (45).

9. The contact unit of claim 8, wherein: the arc extinguishing chamber (40) comprises an arc extinguishing chamber, one end of the arc extinguishing chamber is provided with an arc inlet, buffer areas (45) are arranged on two opposite sides outside the arc extinguishing chamber, two grid sheet groups (41) are arranged in the arc extinguishing chamber, each grid sheet group (41) is adjacent to one buffer area (45), and exhaust holes (423) are formed in the side wall of the arc extinguishing chamber between the buffer areas (45) and the grid sheet groups (41).

10. The contact unit of claim 8, wherein: the arc extinguishing system comprises two arc extinguishing chambers (40), wherein the two arc extinguishing chambers (40) are located between two buffer areas (45), each arc extinguishing chamber (40) comprises an arc extinguishing chamber, one end of each arc extinguishing chamber is provided with an arc inlet, a grid sheet group (41) is arranged in each arc extinguishing chamber, and an exhaust hole (423) is formed in the side wall of each arc extinguishing chamber located between each buffer area (45) and each grid sheet group (41).

11. The contact unit according to claim 9 or 10, characterized in that: the grid sheet group (41) comprises a plurality of arc-extinguishing grid sheets (411) which are arranged at intervals, arc-extinguishing gaps are formed between two adjacent arc-extinguishing grid sheets (411), and at least part of arc-extinguishing gaps correspond to the exhaust holes (423); an arc extinguishing gap (412) is formed in the edge of one end of each arc extinguishing gate sheet (411), all arc extinguishing gaps (412) are communicated to form arc extinguishing grooves (410), and the arc extinguishing grooves (410) of the two gate sheet groups (41) are opposite.