CN115223827A - Arc extinguish chamber and switch - Google Patents

Abstract

The invention discloses an arc extinguish chamber, which is in a vacuum state or has a sealed structure filled with arc extinguish medium gas, and at least comprises a shell and at least one contact assembly, wherein the shell consists of at least one insulating base and at least one cover body, the insulating base is a concave cavity, the insulating base is formed by overlapping and combining at least one first shell and at least one second shell, the hardness of the first shell is greater than that of the second shell, and the arc extinguish chamber and a switch with the arc extinguish chamber are simple in structure, good in sealing performance, low in cost and simple in process.

Description

Arc extinguish chamber and switch

Technical Field

The invention relates to the field of low-voltage electric appliances, in particular to an arc extinguish chamber with a plastic shell and a switch.

Background

With the excessive exploitation of resources, the price of raw materials is rising, and how to save resources, reduce the cost of electrical components, reduce environmental pollution, and improve the reliability of electric equipment has become an important issue in the manufacture of electrical appliances.

At present, the sealed arc-extinguishing chamber on the market is mostly a sealed electric appliance in a vacuum state or filled with hydrogen, nitrogen or sulfur hexafluoride gas. The sealing method mainly comprises two methods, one method is to weld a porcelain shell and a metal shell; another method is to encapsulate epoxy glue outside the insulating base. Both the two are used for sealing the electric switch tube and isolating the air communication inside and outside the switch tube.

Because the epoxy glue can take place ageing by time and environmental impact, the electric switch pipe of embedment epoxy glue outside the insulating base, along with the live time extension of electric switch pipe, the electric arc burns, and the temperature risees, appears epoxy glue embrittlement very easily, the fracture causes the gas leakage condition, and the reliability is not high.

Because the surface structure of the porcelain material is different from that of the metal material, direct welding often cannot wet the surface of the porcelain and cannot act on the surface of the porcelain to form firm adhesion, and the porcelain and the metal are mostly metalized firstly and then welded at present to seal the porcelain and the metal. The ceramic metallization is to firmly adhere a layer of metal film on the surface of the ceramic, and the metal film is welded with the metal, so that the ceramic and the metal are welded. However, the welding process of porcelain and metal is complex, the cost is high, the sealing reliability is not good, and the gas leakage condition can be generated, so that the electric appliance is burnt and even explodes.

Disclosure of Invention

The invention aims to solve the defects and provides a plastic shell arc extinguish chamber and a switch with low cost and high reliability.

The invention is realized by the following technical scheme:

the utility model provides an arc extinguishing chamber, the arc extinguishing chamber is vacuum state or is filled with arc extinguishing medium gaseous sealed structure, the arc extinguishing chamber includes shell and at least one contact subassembly at least, its characterized in that, the shell comprises at least one insulating base and at least one lid, insulating base is concave cavity, insulating base is formed by at least one first casing and at least one second casing overlapping combination, the hardness of first casing is greater than the hardness of second casing.

Preferably, the material of the first shell is ceramic, resin, nylon, unsaturated polyester or polyformaldehyde.

Preferably, the material of the second shell is resin, nylon, unsaturated polyester, polyformaldehyde or rubber.

Preferably, the rubber material is silicon rubber, fluororubber, nitrile rubber or ethylene propylene diene monomer rubber.

Preferably, at least one end face of the cover body is arranged on the second shell in a pressure sealing mode.

Preferably, the cover body and the insulating base are connected through pressure, so that the second shell is elastically deformed to realize the sealing connection between the insulating base and the cover body.

Preferably, a connecting part, a part of which or all of which is a connecting body, is arranged on the first shell or the second shell, and the hardness of the connecting body is less than that of the second shell.

Preferably, the contact assembly or/and the cover are provided on the connection portion.

Preferably, the first housing is located inside or outside the second housing.

Preferably, the insulating base further includes a third housing disposed to overlap with the first housing and the second housing, and the third housing has a hardness greater than that of the second housing.

Preferably, the second housing is located between the first housing and the third housing.

Preferably, the second housing includes a protruding end, and an end surface of the protruding end is higher than end surfaces of the first housing or/and the third housing.

Preferably, the insulating base is provided with at least two through holes.

Preferably, adhesive glue is arranged between the first shell and the second shell.

Preferably, the contact assembly comprises a moving contact assembly and/or a stationary contact assembly.

Preferably, the fixed contact assembly comprises a fixed contact and a terminal, and the terminal is an end face with or without a step, or a bare conductor without a step, or a conductor with an insulating layer.

Preferably, the sealing between the bare conductor or/and the conductor with the insulating layer and the insulating base is arranged to be in a hot-melt connection.

Preferably, the moving contact assembly includes a guide member made of a metal material or an insulating material.

Preferably, the guide is driven by an electromagnetic or mechanical element.

Preferably, the moving contact component comprises a moving contact, and the moving contact is of an insulation double-breakpoint structure, a conductor double-breakpoint structure or a single-breakpoint structure.

Preferably, the contact of the movable contact is arranged corresponding to the contact of the fixed contact.

Preferably, at least one end edge of the insulation base is provided with a protruding part.

Preferably, when the cover body is a metal piece, the material of the cover body is a colored or ferrous metal material.

Preferably, the cover body comprises a main body part and an edge part, and when the main body part is a metal part, the edge part is a metal part or a nonmetal part.

Preferably, the cover body comprises a main body part and an edge part, and when the main body part is a non-metal part, the edge part is a metal part or a non-metal part.

Preferably, the non-metal part edge part is connected with the insulating base in a welding mode.

Preferably, the arc extinguish chamber further comprises a corrugated pipe and a movable contact part, and the material of the corrugated pipe is metal or nonmetal.

Preferably, the bellows is in sealing connection with the cover or/and the movable contact part.

Preferably, at least one permanent magnet is arranged inside the arc extinguishing chamber.

Preferably, the permanent magnet is a gas-tight permanent magnet.

Preferably, the movable contact component comprises a movable contact, the fixed contact component comprises a fixed contact, and at least one permanent magnet corresponding to the movable contact is arranged outside the insulating base.

Preferably, the permanent magnet is arranged on a center line of the moving contact and the fixed contact.

Preferably, a sealing arrangement is arranged between the contact assembly or/and the cover body and the insulating base.

Preferably, the sealing arrangement is in the form of a pressure connection.

Preferably, the sealing arrangement is in the form of an adhesive connection.

Preferably, the pressure connecting piece is at least one of a hoop, a buckle, a clamp spring, a pin shaft, a rivet, a screw and a lock catch.

Preferably, the process of the pressure connection piece is at least one of metal welding, insulating material welding, thread, part deformation and riveting.

Preferably, the arc-extinguishing medium gas is at least one or a mixture of at least two of hydrogen, nitrogen and sulfur hexafluoride.

Preferably, the arc chute further comprises a shield.

Preferably, the arc extinguishing chamber further comprises a vacuum-pumping or/and arc-extinguishing medium gas piece.

Preferably, the evacuation and/or arc-extinguishing medium gas charging device is a metal tube welded or pressed on the metal piece or the insulating shell.

Preferably, the evacuation or arc extinguishing medium gas filling device is an insulating tube, the insulating tube is made of rubber materials or plastic materials,

preferably, the evacuation or arc extinguishing medium gas filling device is an insulating tube, and the insulating tube is an extension of the insulating base.

Preferably, the device is permanently sealed after evacuation or/and charging of the arc-extinguishing medium gas is completed.

On the other hand, the invention also discloses a switch, which comprises the arc extinguish chamber, the electromagnetic system and the insulating shell, wherein the cover body is a metal cover body, the arc extinguish chamber comprises a closed cavity formed by the insulating base, a metal sealing element, the metal cover body and two static contacts, a movable contact corresponding to the two static contacts is arranged in the closed cavity, a vacuumizing or/and arc-extinguishing medium gas part is welded or pressed on the metal sealing element, at least one magnetic steel is arranged outside the arc extinguish chamber and at the position corresponding to the movable contact, one end surface of each of the static contacts and the cover body is in airtight connection with the second shell, and hydrogen is filled in the closed cavity.

On the other hand, the invention also discloses a switch, which comprises the arc extinguish chamber, wherein the cover body is a non-metal cover body, the arc extinguish chamber comprises an insulating base, a moving contact, a fixed contact, a first elastic part, a guide part and a non-metal cover body, the insulating base and the non-metal cover body are hermetically connected to form a sealed insulating shell, the moving contact is connected with the guide part through the first elastic part, the guide part moves in the insulating shell to drive the moving contact to be connected with or disconnected from the fixed contact, the position of the arc extinguish chamber, which corresponds to the moving contact and the fixed contact, is provided with at least one magnetic steel, the insulating base and the non-metal end body at least comprise a second shell and a first shell from inside to outside, the insulating base and the non-metal cover body are welded through plastics, the insulating base and the non-metal cover body are connected in an airtight manner, and the inner space of the arc extinguish chamber is filled with hydrogen.

On the other hand, the invention also discloses a switch, which comprises the arc extinguish chamber and an external driving part, wherein the cover body is a metal cover body, the arc extinguish chamber comprises a closed cavity formed by the insulating base, a corrugated pipe, a fixed contact and two metal cover bodies, a movable contact corresponding to the fixed contact is arranged in the closed cavity, a vacuumizing or/and arc extinguishing medium gas part is welded on the metal cover body, the external driving part drives the movable contact to be connected with or separated from the fixed contact, the insulating base at least comprises a second shell and a first shell which are arranged from inside to outside, one end face of the metal cover body is in airtight connection with the second shell, and the inner space of the arc extinguish chamber is in a vacuum state.

On the other hand, the invention also discloses a switch, which comprises the arc extinguish chamber and an external driving magnetic steel, wherein the cover body is a metal cover body, the arc extinguish chamber comprises a closed cavity formed by the insulating base and two metal cover bodies, a fixed contact, a movable contact, a soft connecting line and the closed magnetic steel, the fixed contact is fixed on the metal cover body at the upper part, the movable contact and the fixed contact are arranged correspondingly, the movable contact is connected with the metal cover body at the lower part through the soft connecting line, the movable contact is connected with the closed magnetic steel, the external driving magnetic steel drives the movable contact to be connected with or separated from the fixed contact through repulsion of homopolarity of the closed magnetic steel in the external driving magnetic steel, the insulating base at least comprises a second shell and a first shell which are arranged from inside to outside, one end face of the metal cover body is connected with the second shell in an airtight mode, and hydrogen is filled in the closed cavity.

Preferably, the electromagnetic system is an electrically driven electromagnet.

Preferably, the electromagnetic system is an electrically driven bistable electromagnet.

The invention has the following beneficial effects:

1. the structure is simple: the arc extinguish chamber comprises a closed cavity formed by an insulating base and at least one cover body, wherein the cavity is an insulating base in a vacuum state or filled with arc extinguishing medium gas, so that the air tightness of the cavity can be ensured, the insulating base can become a structural member for mounting components such as a contact and the like, and the insulating base has diversified functions;

2. the reliability is high: the structure ensures the air isolation between the inside and the outside by utilizing the deformation of the second shell, and has high reliability compared with a glue pouring process;

3. the cost is low: the first shell is made of conventional materials such as resin, nylon, phenolic aldehyde, unsaturated polyester, polyformaldehyde and the like; the second shell is made of silicon rubber, fluororubber or ethylene propylene diene monomer, and the second shell is lower in cost compared with the existing ceramic shell while the airtightness of the arc extinguish chamber is guaranteed.

4. The forming process is simple: the first shell is molded firstly, the first shell serves as an insert, and then the second shell is subjected to injection molding, so that the process is simple, and compared with a ceramic material welding process, the cost advantage is particularly obvious.

5. Maintenance is not required: because the reliability of air tightness is increased, the switch tube of the invention can not cause air leakage due to the problem of sealing in the whole life cycle, therefore, the plastic shell arc extinguish chamber of the invention does not need to maintain the air tightness by keeping the functions of charging and discharging like a sulfur hexafluoride breaker, and the plastic shell arc extinguish chamber of the invention can be directly used for permanently sealing the charging port.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of an internal structure of an arc extinguish chamber in an open state according to a first embodiment of the invention.

Fig. 2 is a schematic cross-sectional view of an insulating base of an arc extinguishing chamber according to a first embodiment of the present invention.

Fig. 3 is an enlarged view of a connecting portion between the insulating base and the cover in fig. 1.

Fig. 4 is an enlarged view of a connection portion of a stationary contact at a position B in fig. 1.

Fig. 5 is a schematic structural diagram of a switch including an arc extinguish chamber according to the first embodiment of the present invention in an open state.

Fig. 6 is an enlarged view of the connection portion of the housing at C in fig. 5.

Fig. 7 is a schematic cross-sectional view of an insulating base of an arc chute according to a second embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view of an insulating base of another arc chute according to a second embodiment of the present invention.

Fig. 9 is a schematic view of an insulating base of an arc chute according to a third embodiment of the present invention.

Fig. 10 is a schematic view of a metal cover of an arc extinguish chamber according to a third embodiment of the invention.

Fig. 11 is a schematic diagram of an internal structure of an arc extinguish chamber in a closing state according to a third embodiment of the invention.

Fig. 12 is a schematic view of an insulating base of an arc chute according to a fourth embodiment of the present invention.

Fig. 13 is a schematic view of a cover of an arc extinguish chamber according to a fourth embodiment of the invention.

Fig. 14 is a schematic diagram of an internal structure of an arc extinguish chamber in an open state according to a fourth embodiment of the invention.

Fig. 15 is a partial schematic view of a terminal connection of an arc chute according to a fourth embodiment of the invention.

Fig. 16 is a schematic structural diagram of an arc-extinguishing chamber containing a permanent magnet according to a fourth embodiment of the invention.

Fig. 17 is a partial schematic view of a second connection mode of a terminal of an arc extinguish chamber according to a fourth embodiment of the invention.

Fig. 18 is a schematic view of an insulating base of an arc chute according to a fifth embodiment of the present invention.

Fig. 19 is a schematic diagram of an internal structure of an arc extinguish chamber in an open state according to a fifth embodiment of the invention.

Fig. 20 is a schematic view of an insulating base of another structure of an arc chute according to a fifth embodiment of the present invention.

Note: a is plastic ultrasonic welding, and b is riveting.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

First embodiment

As shown in fig. 1 to 4, the present embodiment discloses an arc extinguish chamber, which includes an insulating base 100, a metal cover 110 connected to the insulating base 100, a metal seal 150 connected to the metal cover 110, 2 stationary contacts 270, and a movable contact assembly, where the stationary contact 270 is connected to an opening at an upper end of the insulating base 100. Thus, the insulating base 100, the metal cover 110, the metal sealing member 150, and the 2 static contacts 270 together form a closed cavity, hydrogen is filled in the closed cavity, the vacuum pumping or/and arc extinguishing medium gas filling member 180 is disposed at the lower end of the closed cavity, the device 180 is a copper tube, and the vacuum pumping or/and arc extinguishing medium gas filling member is permanently sealed by a welding port after the vacuum pumping or/and arc extinguishing medium gas filling is completed.

Further, the insulation base 100 comprises a third shell 100-13, a second shell 100-12 and a first shell 100-11 which are sequentially stacked from inside to outside, the second shell 100-12 is stacked and sleeved outside the first shell 100-11, the third shell 100-13 is stacked and arranged outside the second shell 100-12, the hardness of the first shell and the third shell is greater than that of the second shell, namely, the second shell 100-12 is made of a soft insulation material, the first shell 100-11 and the third shell 100-13 are made of a hard insulation material, the second shell 100-12 is made of resin, nylon, unsaturated polyester, polyformaldehyde or rubber, and the first shell 100-11 and the third shell 100-13 are made of ceramic, resin, nylon, unsaturated polyester or polyformaldehyde. The end face of the extending end 100-121 of the second shell 100-12 is higher than the end faces of the first shell 100-11 and the third shell 100-13, the cross section of the extending end 100-121 is semicircular, and the extending end 100-121 has elasticity, so that the insulating base 100 can be connected with other components in a good sealing connection effect.

In this embodiment, the insulating base 100 is provided with a through hole 101, the upper 2 through holes are connected with the 2 static contacts 270 in a pressure-tight manner or in an adhesive manner, the lower through hole is connected with the metal cover 110 in a pressure-tight manner, and the extending ends 100-121 elastically deform during the pressure connection to achieve the sealing connection between the insulating base 100 and the static contacts 270, between the metal cover 100 and between the metal cover 150.

Further, at the joint of the static contact 270 and the insulating base 100, a rectangular protrusion is extended from the second housing 100-12 of the insulating base 100 to be compressed and deformed with a shaft shoulder of the static contact 270 to form a sealed connection, an opening at the upper portion of the static contact 270 is clamped and connected by a clamp spring 280, the clamp spring 280 is a standard component with a standard number of GB/T896, and is clamped and inserted by deformation of the material itself during assembly.

The moving contact assembly comprises a bridge-type contact 250, a magnetic conductive plate 240, a guide member 200, a moving iron core 140, a contact auxiliary member 190, a first elastic member 260 and a second elastic member 290 which are respectively sleeved on the upper end portion and the lower end portion of the guide member 200, the bridge-type contact 250 and the 2 static contacts 270 are correspondingly arranged, the guide member 200 respectively penetrates through the contact auxiliary member 190 and the bridge-type contact 250, the lower end of the guide member extends into the moving iron core 140, one end of the first elastic member 260 abuts against the bridge-type contact 250, the other end of the first elastic member abuts against the contact auxiliary member 190, one end of the second elastic member 290 abuts against the contact auxiliary member 190, the other end of the second elastic member 290 abuts against the moving iron core 140, the moving iron core can reciprocate in the extending direction of the guide member 200 in the cavity, the contact auxiliary member 190 is provided with 2 static contacts 210,2 which are all arranged right below the contact auxiliary member 270, the outside each permanent magnet 210 is isolated from a silicon rubber layer 220 with the hydrogen in the cavity by a thickness of 0.2mm, the static contact 190 is provided with two permanent magnets 5363 zxft, the two permanent contacts which are respectively arranged on the upper end of the magnetic conductive plate 240, and the copper pole, the contact plate 240, the upper end of the bridge-type contact 220 and the copper pole extending out of the contact 250 are flush with the copper pole 270, and the lower end of the copper pole 270.

The arc extinguish chamber further comprises a shielding cover 230, the shielding cover 230 is located on two sides of the bridge contact 250, the shielding cover 230 is a 0.5mm stainless steel sheet, the shielding cover 230 is arranged between the bridge contact 250 and the insulating base 100 and is flush with the lowest end face of the static contact 270, and the shielding cover is used for shielding and protecting the insulating base 100 from being burnt by electric arcs and keeping the insulating performance of the insulating base 100. The outer ring of the metal cover body 100 is injection-molded with a nylon ring 120, in order to ensure the reliability of the connection between the nylon ring 120 and the metal cover body 100, 60 small holes are uniformly distributed on the outer ring of the metal cover body 100, and the nylon ring 120 is injection-molded to fill the 60 small holes on the outer ring of the metal cover body 100, so as to ensure the reliability of the connection between the nylon ring and the metal cover body.

Further, the insulation base 100 and the metal cover 100 are connected by pressure, the protruding ends 100 to 121 of the insulation base 100 are in a deformed state by applying pressure to the two, and then the insulation base 100 and the nylon ring 120 of the metal cover 100 are connected by ultrasonic welding at a.

The method for filling hydrogen into the arc extinguish chamber comprises the following steps: the vacuum is first pumped out and then hydrogen is filled in. After the charging of hydrogen gas is completed, the vacuum pumping or/and arc-extinguishing medium gas member 180 is permanently sealed in a mode of changing from extrusion deformation to welding at the mouth part.

On the other hand, as shown in fig. 5 and 6, the switch includes the arc extinguish chamber, the electromagnetic system disposed outside the arc extinguish chamber, and the housing 170, where the electromagnetic system is the coil assembly 130, and the movable iron core 140 performs position change through the combined action of the magnetic effect of the electromagnetic coil assembly 130 and the elasticity of the second elastic member 290, so as to drive the bridge contact 250 to change its position, and thus, the switch is connected to and disconnected from the stationary contact 270. The electromagnetic coil assembly 130 is arranged outside the sealed cavity of the arc extinguish chamber, sealing is not needed, the shell 170 is made of nylon materials, and the shell 170 and the nylon ring 120 are connected through ultrasonic welding at a position.

On the other hand, the invention also discloses a manufacturing method of the insulation base 100, which comprises the following steps:

s10, injection molding the first shell 100-11;

s20, injecting a second shell 100-12 outside the first shell 100-11;

s30, the third shell 100-13 is injected outside the second shell 100-12.

On the other hand, the present invention also discloses another method for manufacturing the insulation base 100, which comprises the steps of:

s100, respectively injection-molding the first shell 100-11 and the third shell 100-13;

s200, nesting the third shell 100-13 outside the first shell 100-11;

s300, injection molding the second shell 100-12 between the first shell 100-11 and the third shell 100-13.

Second embodiment

As shown in fig. 7 and 8, the present embodiment discloses an arc extinguish chamber with another structure, which is different from the embodiment in that the insulating base 100 includes a second casing 100-12 and a first casing 100-11 stacked from inside to outside, the second casing is connected with the first casing by gluing, the hardness of the second casing 100-12 is less than that of the first casing 100-11, that is, the second casing 100-12 is made of a soft insulating material, the first casing 100-11 is made of a hard insulating material, the second casing 100-12 is made of resin, nylon, unsaturated polyester, polyoxymethylene or rubber, and the first casing 100-11 is made of ceramic, resin, nylon, unsaturated polyester or polyoxymethylene. The end face of the extending end 100-121 of the second shell 100-12 is higher than the end face of the first shell 100-11, the section of the extending end 100-121 is semicircular, the extending end 100-121 has elasticity, so that the insulating base 100 can be connected with other components in a good sealing connection effect, and the insulating base 100 is provided with a through hole 101 for being assembled with other components.

As shown in fig. 8, in another specific embodiment, in order to ensure that the two parts of the first casing 100-11 and the second casing 100-12 are fixed, when the second casing 100-12 is injection molded to be soft, the protruding structures 100-122 are injection molded along the circular holes uniformly distributed on the first casing 100-11, and the outer end surface diameter is made larger, similar to a nail head structure, so as to ensure that the second casing is not separated from the first casing to interfere with the operation of internal components when a switch product is vacuumized and after the product is aged, and further description is omitted in this structure.

Third embodiment

As shown in fig. 9 to 11, the present embodiment discloses an arc extinguish chamber, which includes an insulating base 100 as above, and 2 metal sealing caps 110 connected to the insulating base 100, wherein the insulating base 100 and the metal sealing caps 110 are connected to a flange 102 of the insulating base 100 by uniformly distributed 20 teeth 110-11 extending from the surface of the metal sealing caps 110 through deformation riveting. As shown in fig. 9, the protruding ends 100-121 of the second casing 100-12 are higher than the end surfaces of the first casing 100-11 and the third casing 100-13, and the protruding ends 110-121 are deformed, so that the insulating base 100 is hermetically connected with the metal sealing cover 110, and the airtightness of the arc extinguish chamber is ensured.

Further, the arc extinguishing chamber includes a bellows 150 and a movable contact portion, the movable contact portion includes a collar 390, one end of the bellows 150 is connected to the upper metal sealing cover 110 by welding, the other end of the bellows is connected to the upper end face of the collar 390 by welding, and the lower end face of the collar 390 is connected to the movable contact 300 by welding. The fixed contact 310 is welded to the lower metal sealing housing 110, and the fixed contact 310 is T-shaped. The lower metal sealing cover shell 110 is welded with a vacuum or/and arc-extinguishing medium gas member 180, and the vacuum or/and arc-extinguishing medium gas member 180 is a copper pipe and is permanently sealed. To this end, the arc extinguishing chamber is formed with an airtight space, which is isolated from the external air and is in a vacuum state, by the insulating base 100, the 2 metal sealing cases 110, the bellows 150, the fixed contact 190, the movable contact 200, and the collar 390.

The vacuum pumping method of the arc extinguish chamber comprises the following steps: after the vacuum pumping is finished, the vacuum pumping or/and arc-extinguishing medium gas member 180 is permanently sealed in a mode of changing from extrusion deformation to welding at the mouth part.

The bellows 320 provides a contact pressure to the movable contact 300.

The fixed contact 310 and the movable contact 300 are made of copper.

The movable contact 300 can move up and down in the switch tube along the axial direction shown in the figure; the traction structure is arranged outside the switch to pull the movable contact 300 to move upwards to overcome the elastic pressure of the corrugated pipe 320, so that the movable contact 300 is disconnected with the static contact 310, and when the traction force of the traction structure disappears, the elastic force of the corrugated pipe 320 enables the movable contact 300 to move downwards, so that the movable contact 300 resets and is connected with the static contact 310.

Third embodiment

As shown in fig. 12 to 17, the present embodiment discloses an arc extinguish chamber, which includes a housing composed of the insulating housing 100 and the non-metallic cover 110, as described above, a movable contact 250, a stationary contact 270, and a first elastic element 260 disposed on the movable contact 250. The insulation base 100 comprises a first shell 100-11 and a second shell 100-12; the non-metallic lid 110 includes a first cover layer 110-11 and a second cover layer 110-12, wherein the second cover layer 110-12 encases the evacuated or/and charged arc medium gas piece 180. When the insulating base 100 is connected with the non-metal cover 110, the extending end 100-121 is connected with the corresponding second cover layer 110-12 in a pressing mode, the extending end 100-121 and the second cover layer 110-12 are compressed and deformed, when the compression amount is 10%, the first shell 100-11 and the first cover layer 110-11 are welded through ultrasonic plastic, and the air tightness of the connecting portion is guaranteed.

With reference to fig. 14, the arc extinguish chamber further includes a driving mechanism for driving the movable contact, the driving mechanism includes a first rod 310 and a second rod 300, the first rod 310 and the second rod 300 are both rods having a tooth-shaped structure at one end, pressing the first rod 310 can make the second rod 300 rotate and move along an extending direction thereof, the second rod 300 moves to apply pressure to the first elastic member 260, the first elastic member 260 compresses and deforms to push the movable contact 250 to move towards the fixed contact 270, so as to achieve the contact or disconnection between the movable contact and the fixed contact, and the arc extinguish chamber is connected or disconnected.

With reference to fig. 15, a connection terminal of a moving contact 250 of the arc extinguish chamber is preset with fluororubber 250-11 at a connection part with the housing, in order to ensure tight connection between the preset material and the moving contact, 3 small holes are punched at the moving contact, and then the fluororubber is injection molded into a state of 250-12. The movable contact fluororubber 250-11 is arranged between the first shell 100-11 of the insulating base 110 and the second cover layer 110-12 of the non-metal cover 110 and connected by pressure.

With reference to fig. 16, the arc extinguishing chamber further includes permanent magnets 210 disposed on both sides of the moving contact 250 and the static contact 270, and when the contacts are broken, the permanent magnet steel 310 rapidly elongates the arc through a magnetic blow-out effect, so as to improve the arc extinguishing capability of the arc extinguishing chamber.

The interior of the arc extinguish chamber is in a hydrogen charging state, the vacuumizing or/and arc extinguishing medium gas part 180 evacuates the air in the charging process to reach or approach the vacuum state, then the hydrogen is charged, and finally the vacuumizing or/and arc extinguishing medium gas part 180 is fastened to ensure the air tightness in the arc extinguish chamber.

In other specific embodiments, the movable contact 250 of the arc extinguish chamber may also be connected by adopting a structure as shown in fig. 17, the movable contact 250 is provided with a fluororubber 250-12 with a trapezoidal section on an outer ring, a trapezoidal groove which has the same angle with the fluororubber 250-12 of the movable contact but a slightly smaller width is arranged at an end of the second housing 100-12, and the two are connected by pressure, so that the fluororubber material 250-12 deforms in the up-down direction, the left-right direction, and the sealing is performed.

Fifth embodiment

As shown in fig. 18 to 19, the present embodiment discloses an arc extinguish chamber, where the arc extinguish chamber includes an insulating base 100, 2 metal sealing covers 110, a moving contact 250, a static contact 270, a first elastic element 260, and a flexible connection line 350, the insulating base 100 includes second 100-12 and first housings 100-11, the two housings are connected by adhering with glue, the insulating base 100 and each metal sealing cover 110 are connected by pressing and riveting with 4 evenly distributed rivets 340, and an extending end 100-121 of the second housing 100-12 bears pressure and deforms to ensure airtightness of a connection portion. The metal sealing cover 110 is welded with a vacuum-pumping or/and arc-extinguishing medium gas member 180, and the vacuum-pumping or/and arc-extinguishing medium gas member 180 is a copper pipe and is permanently sealed. So far, the cavity of explosion chamber forms airtight space, and isolated with the outside air, is filled with hydrogen in the explosion chamber.

A downward convex boss is arranged on the metal sealing cover 110 at the upper part, the boss is a static contact 270, the moving contact 250 is arranged corresponding to the static contact 270, the moving contact 250 is welded with one end of the flexible connecting wire 350, and the other end of the flexible connecting wire is welded on the metal sealing cover 110 at the lower part. Further, a permanent magnet 210 is arranged in the cavity of the arc extinguish chamber, a circle of protective sleeve 340 is wrapped on the periphery of the permanent magnet 210, the protective sleeve 340 is a silicone rubber sleeve, the permanent magnet 210 is sealed by a passive contact 250 and the protective sleeve 340, the permanent magnet 210, the movable contact 250 and the protective sleeve 340 are mutually associated and can move up and down in the arc extinguish chamber, the permanent magnet 210, the movable contact 250 and the protective sleeve 340 can change positions through the magnetic effect of additional permanent magnet steel and the elastic comprehensive action of a first elastic part 260, and the movable contact 250 and the fixed contact 270 can be connected and disconnected, wherein the fixed contact 270 and the movable contact 250 are both made of copper materials, and the protective sleeve 340 is made of ferromagnetic materials.

The method for filling hydrogen into the arc extinguish chamber comprises the following steps: after the hydrogen filling is finished, the vacuum pumping or/and arc-extinguishing medium gas member 180 is permanently sealed in a mode of changing the extrusion deformation of the mouth into welding.

It should be noted that, as shown in fig. 20, in order to ensure the fixing of the first casing 100-11 and the second casing 100-12 of the insulating base 100, when the second casing 100-12 is injection molded, the structures 100-122 are injection molded by circular holes uniformly distributed along the first casing 100-11, and the outer end surface diameter is made larger, similar to a nail head structure, and in this structure, the details are not repeated.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The present embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (50)

1. The utility model provides an arc extinguishing chamber, the arc extinguishing chamber is vacuum state or is filled with arc extinguishing medium gaseous sealed structure, the arc extinguishing chamber includes shell and at least one contact subassembly at least, its characterized in that, the shell comprises at least one insulating base and at least one lid, insulating base is concave cavity, insulating base is formed by at least one first casing and at least one second casing overlapping combination, the hardness of first casing is greater than the hardness of second casing.

2. The arc chute of claim 1, wherein the material of the first housing is ceramic, resin, nylon, unsaturated polyester, or polyoxymethylene.

3. The arc chute of claim 1, wherein the material of the second housing is resin, nylon, unsaturated polyester, polyoxymethylene, or rubber.

4. The arc chute according to claim 3, characterized in that the rubber material is silicone rubber, fluoro-rubber, nitrile rubber or ethylene propylene diene rubber.

5. The arc chute of claim 1, wherein at least one end surface of the cover is compressively sealingly disposed on the second housing.

6. The arc chute of claim 1, wherein the cover is connected to the insulating base by a press to elastically deform the second housing to sealingly connect the insulating base to the cover.

7. The arc chute according to claim 1, characterized in that a connecting part, which is partially or entirely a connecting body, is provided on the first housing or the second housing, and the hardness of the connecting body is less than that of the second housing.

8. The arc chute of claim 8, wherein the contact assembly or/and the cover are disposed on the connecting portion.

9. The arc chute of claim 1, wherein the first housing is located inside or outside the second housing.

10. The arc chute of claim 9, wherein the insulating base further comprises a third housing disposed in overlapping relation with the first housing and the second housing, the third housing having a hardness greater than the second housing.

11. The arc chute of claim 10, wherein the second housing is located between the first housing and the third housing.

12. The arc chute according to claim 1 or 10, characterized in that the second housing comprises a protruding end, the end face of which is higher than the end faces of the first or/and third housing.

13. The arc chute of claim 1, wherein the insulating base has at least two through holes.

14. The arc chute of claim 1, wherein an adhesive glue is disposed between the first housing and the second housing.

15. The arc chute of claim 1, wherein the contact assembly comprises a moving contact assembly and/or a stationary contact assembly.

16. The arc chute of claim 15, wherein the stationary contact assembly comprises a stationary contact and a terminal, the terminal being an end face with or without a step, or a bare conductor without a step, or a conductor with an insulating layer.

17. The arc chute according to claim 16, wherein the seal between the bare conductor or/and the insulated conductor and the insulating base is provided as a heat-fused connection.

18. The arc chute of claim 15, wherein the moving contact assembly comprises a guide made of a metallic material or an insulating material.

19. The arc chute of claim 18, wherein the guide is driven by an electromagnetic or mechanical element.

20. The arc chute of claim 15, wherein the moving contact assembly comprises a moving contact, and the moving contact is of an insulation double-break point, a conductor double-break point or a single-break point structure.

21. The arc chute of claim 20, wherein the contacts of the movable contact are arranged to correspond to the contacts of the stationary contact.

22. The arc chute of claim 1, wherein at least one end edge of the dielectric base is provided with a protrusion.

23. The arc chute of claim 1, wherein the material of the cover is a colored or ferrous metal material when the cover is a metal piece.

24. The arc chute of claim 1, wherein the cover includes a main portion and an edge portion, and when the main portion is a metallic member, the edge portion is a metallic member or a non-metallic member.

25. The arc chute of claim 1, wherein the cover includes a main portion and an edge portion, and when the main portion is a non-metallic member, the edge portion is a metallic or non-metallic member.

26. The arc chute of claim 25, wherein the non-metallic piece edge portion is welded to the insulating base.

27. The arc chute of claim 1, further comprising a bellows and a moving contact, wherein the bellows is made of a metal or a non-metal material.

28. The arc chute of claim 27, wherein the bellows is sealingly connected to the cover or/and the movable contact.

29. Arc chamber according to claim 1, characterized in that at least one permanent magnet is arranged inside the arc chamber.

30. The arc chute of claim 29, wherein the permanent magnet is a hermetically sealed permanent magnet.

31. The arc chute according to claim 15, wherein the moving contact assembly comprises a moving contact, the fixed contact assembly comprises a fixed contact, and the insulating base is externally provided with at least one permanent magnet corresponding to the position of the moving contact.

32. The arc chute of claim 31, wherein the permanent magnet is disposed on a centerline of the movable contact and the stationary contact.

33. The arc chute of claim 1, wherein a seal is provided between the contact assembly or/and the cover and the insulating base.

34. The arc chute of claim 33, wherein said sealing arrangement is in the form of a pressure connection.

35. The arc chute of claim 33 wherein said sealing arrangement is in the form of an adhesive bond.

36. The arc chute of claim 34, wherein the pressure connector is at least one of a clamp, a snap spring, a pin, a rivet, a screw, and a latch.

37. The arc chute of claim 34, wherein said pressure connection is made by at least one of metal welding, insulation welding, threading, part deformation, and riveting.

38. The arc chute of claim 1 wherein the arc quenching medium gas is at least one or a mixture of at least two of hydrogen, nitrogen, and sulfur hexafluoride gases.

39. The arc chute of claim 1, further comprising a shield.

40. The arc chute according to claim 1, characterized in that it further comprises an evacuated or/and arc-extinguishing medium gas piece.

41. The arc chute of claim 40, wherein said means for evacuating and/or charging arc-extinguishing medium gas is a metal tube welded or crimped to said metal member or to an insulating housing.

42. The arc chute of claim 40, wherein the means for evacuating or charging arc-extinguishing medium gas is an insulating tube, and the insulating tube is a rubber material or a plastic material.

43. The arc chute of claim 40, wherein the means for evacuating or charging arc-extinguishing medium gas is an insulating tube that is an extension of the insulating base.

44. The arc chute according to any of claims 40 to 43, characterized in that the device is permanently sealed after evacuation and/or charging of arc-extinguishing medium gases is completed.

45. A switch, characterized in that, include the arc extinguish chamber, electromagnetic system and insulating casing of any claim 1-44, the said cover is the metal cover, the said arc extinguish chamber includes the enclosed cavity formed by said insulating base, metal seal, metal cover, two static contacts, there are moving contacts corresponding to said two static contacts position in the said enclosed cavity, weld or crimp-joint on the said metal seal and have vacuum pumping or/and fill the arc-extinguishing medium gas part, set up at least one magnet steel in the position corresponding to said moving contact outside the said arc extinguish chamber, an end of said static contact, cover and said second casing present the airtight connection, fill hydrogen in the said enclosed cavity.

46. A switch is characterized by comprising the arc extinguish chamber as claimed in any one of claims 1 to 44, wherein the cover body is a nonmetal cover body, the arc extinguish chamber comprises the insulating base, a movable contact, a static contact, a first elastic part, a guide part and a nonmetal cover body, the insulating base and the nonmetal cover body are hermetically connected to form a sealed insulating shell, the movable contact is connected with the guide part through the first elastic part, the guide part moves in the insulating shell to drive the movable contact and the static contact to be connected or disconnected, at least one magnetic steel is arranged outside the arc extinguish chamber corresponding to the positions of the movable contact and the static contact, the insulating base and the nonmetal cover body at least comprise a second shell and a first shell from inside to outside, the insulating base and the nonmetal cover body are welded through plastics and are connected in an airtight mode, and hydrogen is filled in the inner space of the arc extinguish chamber.

47. A switch is characterized by comprising the arc extinguish chamber and an external driving piece according to any one of claims 1 to 44, wherein the covers are metal covers, the arc extinguish chamber comprises a closed cavity formed by the insulating base, a corrugated pipe, a fixed contact and two metal covers, a movable contact corresponding to the fixed contact is arranged in the closed cavity, a vacuumizing or/and arc extinguishing medium gas piece is welded on the metal covers, the external driving piece drives the movable contact to be connected with or separated from the fixed contact, the insulating base at least comprises a second shell and a first shell which are arranged from inside to outside, one end face of each metal cover is connected with the second shell in an airtight mode, and the inner space of the arc extinguish chamber is in a vacuum state.

48. A switch is characterized by comprising the arc extinguish chamber and external driving magnetic steel according to any one of claims 1 to 44, wherein the cover bodies are metal cover bodies, the arc extinguish chamber comprises a closed cavity formed by the insulating base and the two metal cover bodies, a fixed contact, a movable contact, a soft connecting line and the closed magnetic steel, the fixed contact is fixed on the upper metal cover body, the movable contact and the fixed contact are arranged correspondingly, the movable contact is connected with the lower metal cover body through the soft connecting line, the movable contact is connected with the closed magnetic steel, the external driving magnetic steel drives the movable contact to be connected with or separated from the fixed contact through repulsion of like poles of the closed magnetic steel in the external driving magnetic steel, the insulating base at least comprises a second shell and a first shell which are arranged from inside to outside, one end face of the metal cover body is connected with the second shell in an airtight mode, and hydrogen is filled in the closed cavity.

49. A switch as claimed in claim 45 wherein said electromagnetic system is an electrically driven electromagnet.

50. A switch as claimed in claim 45 wherein said electromagnetic system is an electrically driven bistable electromagnet.

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