CN107863266A - The arc quenching chamber structure and its design method of distribution vacuum switch - Google Patents
The arc quenching chamber structure and its design method of distribution vacuum switch Download PDFInfo
- Publication number
- CN107863266A CN107863266A CN201711146330.1A CN201711146330A CN107863266A CN 107863266 A CN107863266 A CN 107863266A CN 201711146330 A CN201711146330 A CN 201711146330A CN 107863266 A CN107863266 A CN 107863266A
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- Prior art keywords
- contact
- diameter
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- bar
- arc
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66238—Specific bellows details
Abstract
The invention belongs to controller switching equipment field, more particularly to a kind of arc quenching chamber structure and its design method with Vacuum interrupter.The present invention proposes a kind of method being designed based on rated short circuit drop-out current to vacuum switch arc quenching chamber structure and the arc quenching chamber structure designed using this method, the design method has taken into full account properties of product, structure and design efficiency, be advantageous to simplify the design process of existing vacuum switch arc-chutes, while can obtain smaller szie according to the design method while meet the arc-chutes of performance requirement.
Description
Technical field
The invention belongs to controller switching equipment field, more particularly to a kind of arc quenching chamber structure and its design side with Vacuum interrupter
Method.
Background technology
Vacuum switch is wide variety of equipment in distribution control and protection system, different with function according to its principle, again
It is divided into the different types such as vacuum circuit breaker, vacuum load switch and vacuum contactor, wherein vacuum contactor has physics knot
Structure is compact, and size is compact, stable work in work and can be long-term use of, while its is pollution-free, and change the outfit efficiency high, can be extensive
Applied to various hi-lo circuits, compared to other species vacuum switches can with it is good meet power network to high-performance, high efficiency,
The requirement such as low-maintenance cost, it is the main direction of development of following power network vacuum switch.With the continuous development of vacuum contactor,
On business scope gradually develops its product to all types of high voltages, high current occasion, and this performance to vacuum contactor proposes
Requirements at the higher level, and as the core of vacuum contactor, the properity and technical parameter of vacuum interrupter are limitation and branch
Hold the critical elements of each function of vacuum contactor.Simultaneously with the development of electric power network technique, in power network various equipment and circuit towards
Miniaturization, integrated, intelligent direction, accordingly, applied to all kinds of components in power network also to its size, Portability etc.
There is new requirement, as switch element important in power network, vacuum contactor is also required to be improved its properity
Optimization could adaptive technique development and the market demand.
The content of the invention
The purpose of the invention is, there is provided a kind of arc quenching chamber structure and its design method of distribution vacuum switch,
It can subtract its size on the premise of vacuum switch performance is ensured, and can keep good under high voltage, high current application
Stability.
To achieve the above object, the invention adopts the following technical scheme that.
A kind of arc quenching chamber structure of distribution vacuum switch, including totally enclosed shell, the contact in shell, are located at
The contact bar at shell both ends and the radome in shell, the radome include the end profile shielding positioned at shell both ends
Cover, located at the contact shield cover of contact head surrounding；
The contact shield cover is cylinder-like structure and is uniformly arranged on contact periphery, the contact shield cover rear and front end
Length is not less than contact entire length so that contact can be trapped among in contact shield cover completely, the internal diameter D of the contact shield cover
Meet：Wherein d refers to clearance between open contacts (cm), D1Refer to internal diameter of outer cover (cm), WmaxRefer to shield
Cover the permissible value (kW/cm that cover absorbs arc power2), U refers to arc voltage (V), and I refers to breaking current (A)；Wherein shield
The minimum thickness θ of coverminMeetWherein λ refers to material thermal conductivity (W/ (cm* DEG C)), t1When referring to heat effect
Between (s), C refers to material heat than (J/ (kg* DEG C)), and ρ refers to density of material (kg/cm3)
The contact bar includes quiet contact bar and dynamic contact bar, and the contact bar is cylindrical-shaped structure, and contact bar one end connects
It is connected to contact head one end and stretches out housing exterior, the diameter D of the contact barGMeetWherein
RGFor contact resistance (Ω), τGRefer to the contact limit of working temperature (DEG C), Δ lGIt is that abutment bar stretches out casing part length
Spend (cm), KTRefer to coefficient of heat transfer (W/cm2*℃)；
The contact includes moving contact and static contact, and the moving contact and static contact are round pie, and the contact is provided with
Bar mounting hole is contacted, the contact bar installation hole depth is contact thickness half, and the contact thickness is 3~11mm；It is described quiet
Contact is arranged on quiet contact bar, and quiet contact bar is fixed in the quiet contact bar mounting hole on shell, and moving contact is installed on dynamic contact
Bar, move in the mobilizable dynamic contact bar mounting hole on the shell of contact bar, two contact bars and contact head it is coaxial respectively and
Face is arranged.
Further, the shell includes insulating part, and the insulating part is ring-type, and the both ends of insulating part are provided with blind end,
The insulating part is highly not less than 30mm.
Further, the relative face of the contact head is contact surface, and contact surface edge passes through round and smooth processing.
A kind of distribution design method of vacuum switch arc-chutes, comprises the following steps,
Step 1, rated short circuit drop-out current and the basic size scope of product, the base are determined according to design requirement
This size range includes basic contact diameter, basic shell internal-and external diameter, basic electro-conducting shank diameter；
Step 2, determined in disc contact, transverse magnetic contact, vertical magnetic field structure of contact terminal according to the size of drop-out current
Structure of contact terminal to be selected, expected contact diameter is calculated under structure of contact terminal to be selected, selects expected contact diameter to be no more than basic
The immediate structure of contact terminal of contact diameter；The calculation formula of the expected contact diameter is as follows：
Wherein y is rated short circuit drop-out current (kA), and x is contact diameter (mm)；
Step 3, according toDetermine contact shield cover diameter D and be internal diameter of outer cover D1, D1No
More than being passed through in basic shell；
Step 3, according to formulaIt is determined that conductive shank diameter DG；
Step 4, it is determined that arriving in pole diameter D and shell through D1On the basis of design bellows, ripple pipe diameter DB
Meet DB=D1+ μ, μ are adjustment factor, and μ ∈ (0.5,2.5), the thickness H of bellowsB(mm) H is metB≈(0.121+
0.0007DB) * γ, γ ∈ [0.9,1.1].
Its advantage is：According to airport development trend with the market demand, the present invention proposes a kind of based on specified short
The method and the arc quenching chamber structure using this method design that road drop-out current is designed to vacuum switch arc quenching chamber structure,
The design method has taken into full account properties of product, structure and design efficiency, is advantageous to simplify existing vacuum switch arc-chutes
Design process, while can obtain smaller szie according to the design method while meet the arc-chutes of performance requirement.
Brief description of the drawings
Fig. 1 is the structural representation of the arc-chutes of the vacuum switch of the present invention.
Its reference includes：
Shell 10；Quiet contact bar 21, dynamic contact bar 22；Static contact 31, moving contact 32；Bellows 41；End profile shielding cover
51st, contact shield cover 52.
Embodiment
The invention is elaborated below in conjunction with specific embodiment.
A kind of arc quenching chamber structure of distribution vacuum switch, including totally enclosed shell 10, the shell 10 of arc-chutes is exhausted
The cylinder-like structure that edge material makes, mainly serves for ensuring the seal and insulating properties of vacuum switch, and wherein shell 10 insulate
Partial size can pass through formulaIt is determined that wherein QaRefer to maximum leak rate, S=π DL (cm2) refer to
The surface area of the insulated part of shell 10；D refers to the diameter of shell 10, and L refers to the length of shell 10, P0Refer to the outer atmospheric pressure of arc-chutes,
P1Refer to arc extinguishing room pressure, Δ refers to the thickness of the insulated part of shell 10.Shell 10 includes glass shell 10, ceramic package
The types such as 10.
Contact in shell 10, located at the contact bar at the both ends of shell 10 and the radome in shell 10, state
Radome includes the end profile shielding cover 51 positioned at the both ends of shell 10, located at the contact shield cover 52 of contact head surrounding；Contact is used for
The break-make of galvanic circle is realized, the contact of dynamic/static contact 31 is realized by the relative motion of sound contact bar 11 and separated, and then
Control loop switches on and off, and the contact shield cover 52 is cylinder-like structure and is uniformly arranged on contact periphery, described to touch
Head radome 52 rear and front end length is not less than contact entire length so that contact can be trapped among in contact shield cover 52 completely；
When electric current passes through contact, contact surface material can occur at high temperature evaporation in addition fusing, splash phenomena such as, radome can
With effectively prevent metallic vapour splash to the inner surface of insulation crust 10 cause the insulating properties of shell 10 decline the problems such as, shield simultaneously
The Electric Field Distribution that cover can influence to lift one's head between idol, improves the dielectric strength between contact.The internal diameter D of the contact shield cover 52
Meet：Wherein d refers to clearance between open contacts (cm), D1Refer to the internal diameter of shell 10 (cm), WmaxRefer to shield
Cover the permissible value (kW/cm that cover absorbs arc power2), U refers to arc voltage (V), and I refers to breaking current (A)；Wherein shield
The minimum thickness θ of coverminMeetWherein λ refers to material thermal conductivity (W/ (cm* DEG C)), t1When referring to heat effect
Between (s), C refers to material heat than (J/ (kg* DEG C)), and ρ refers to density of material (kg/cm3)；To make the Electric Field Distribution between contact more
Adding uniformly, contact shield cover 52 can be fixed by setting metal ring on insulation crust 10, or directly by contact screen
The part that cover 52 is designed as shell 10 is covered, and the insulated part of shell 10 is arranged on the both ends of contact shield cover 52.
The contact bar includes quiet contact bar 11 and dynamic contact bar 12, and the contact bar is cylindrical-shaped structure, contacts bar one
End is connected to contact head one end and stretched out outside shell 10, the diameter D of the contact barGMeet
Wherein RGFor contact resistance (Ω), τGRefer to the contact limit of working temperature (DEG C), Δ lGIt is that abutment bar stretches out shell 10
Partial-length (cm), KTRefer to coefficient of heat transfer (W/cm2*℃)；
The contact includes moving contact 32 and static contact 31, and the moving contact 32 and static contact 31 are round pie, described
Contact is provided with contact bar mounting hole, and the contact bar installation hole depth be contact thickness half, the contact thickness for 3~
11mm；The static contact 31 is arranged on quiet contact bar 11, the quiet mounting hole of contact bar 11 that quiet contact bar 11 is fixed on shell 10
Interior, moving contact 32 is installed on dynamic contact bar 12, moves the mobilizable dynamic mounting hole of contact bar 12 on shell 10 of contact bar 12
Interior, coaxial and face is arranged respectively for two contact bars and contact head.
Further, the shell 10 can be ring-type with insulation, the insulating part, and the both ends of insulating part are provided with closing
End, the insulating part are highly not less than 30mm.
Further, the relative face of the contact head is contact surface, and contact surface edge passes through round and smooth processing.
A kind of distribution design method of vacuum switch arc-chutes, comprises the following steps,
Step 1, rated short circuit drop-out current and the basic size scope of product, the base are determined according to design requirement
This size range includes basic contact diameter, the internal-and external diameter of basic shell 10, basic electro-conducting shank diameter；
Step 2, determined in disc contact, transverse magnetic contact, vertical magnetic field structure of contact terminal according to the size of drop-out current
Structure of contact terminal to be selected, expected contact diameter is calculated under structure of contact terminal to be selected, selects expected contact diameter to be no more than basic
The immediate structure of contact terminal of contact diameter；The calculation formula of the expected contact diameter is as follows：
Wherein y is rated short circuit drop-out current (kA), and x is contact diameter (mm)；
Step 3, according toDetermine the diameter D of contact shield cover 52 and be the internal diameter D of shell 101,
D1Passed through no more than in basic shell 10；
Step 3, according to formulaIt is determined that conductive shank diameter DG；
Step 4, it is determined that interior through D to pole diameter D and shell 101On the basis of design bellows 41, bellows 41
Diameter DBMeet DB=D1+ μ, μ are adjustment factor, and μ ∈ (0.5,2.5), the thickness H of bellows 41B(mm) H is metB≈
(0.121+0.0007DB) * γ, γ ∈ [0.9,1.1].
Finally it should be noted that above example is only illustrating the technical scheme of the invention, rather than to this hair
It is bright create protection domain limitation, although being explained with reference to preferred embodiment to the invention, this area it is general
It is logical it will be appreciated by the skilled person that can be modified to the technical scheme of the invention or equivalent substitution, without departing from this
The spirit and scope of innovation and creation technical scheme.
Claims (4)
1. a kind of arc quenching chamber structure of distribution vacuum switch, including shell, the contact in shell, located at shell both ends
Contact bar and the radome in shell, it is characterised in that the radome includes the end profile shielding positioned at shell both ends
Cover, located at the contact shield cover of contact head surrounding；
The contact shield cover is cylinder-like structure and is uniformly arranged on contact periphery, contact shield cover rear and front end length
Not less than contact entire length so that contact can be trapped among in contact shield cover completely, the internal diameter D of the contact shield cover meets：Wherein d refers to clearance between open contacts (cm), D1Refer to internal diameter of outer cover (cm), WmaxRefer to that radome absorbs
Permissible value (the kW/cm of arc power2), U refers to arc voltage (V), and I refers to breaking current (A)；The minimum of wherein radome is thick
Spend θminMeetWherein λ refers to material thermal conductivity (W/ (cm* DEG C)), t1Refer to the heat effect time (s), C refers to
For material heat than (J/ (kg* DEG C)), ρ refers to density of material (kg/cm3)
The contact bar includes quiet contact bar and dynamic contact bar, and the contact bar is cylindrical-shaped structure, and contact bar one end is connected to
Housing exterior, the diameter D of the contact bar are stretched out in contact head one endGMeetWherein RGIt is tactile
Head contact resistance (Ω), tGRefer to the contact limit of working temperature (DEG C), Δ lGIt is that abutment bar stretches out casing part length (cm),
KTRefer to coefficient of heat transfer (W/cm2*℃)；
The contact includes moving contact and static contact, and the moving contact and static contact are round pie, and the contact is provided with contact
Bar mounting hole, the contact bar installation hole depth is contact thickness half, and the contact thickness is 3~11mm；The static contact
Installed in quiet contact bar, quiet contact bar is fixed in the quiet contact bar mounting hole on shell, and moving contact is installed on dynamic contact bar, moves
Contact in the mobilizable dynamic contact bar mounting hole located on shell of bar, two contact bars and contact head distinguish coaxial and face cloth
Put.
2. a kind of arc quenching chamber structure of distribution vacuum switch according to claim 1, it is characterised in that the shell includes
Insulating part, the insulating part are ring-type, and the both ends of insulating part are provided with blind end, and the insulating part is highly not less than 30mm.
A kind of 3. arc quenching chamber structure of distribution vacuum switch according to claim 1, it is characterised in that the contact head phase
To face be contact surface, contact surface edge passes through round and smooth processing.
A kind of 4. distribution design method of vacuum switch arc-chutes, it is characterised in that comprise the following steps,
Step 1, rated short circuit drop-out current and the basic size scope of product, the basic chi are determined according to design requirement
Very little scope includes basic contact diameter, basic shell internal-and external diameter, basic electro-conducting shank diameter；
Step 2, determined in disc contact, transverse magnetic contact, vertical magnetic field structure of contact terminal according to the size of drop-out current to be selected
Structure of contact terminal, expected contact diameter is calculated under structure of contact terminal to be selected, selects expected contact diameter to be no more than basic contact
The immediate structure of contact terminal of diameter；The calculation formula of the expected contact diameter is as follows：
Wherein y is rated short circuit drop-out current (kA), and x is contact diameter (mm)；
Step 3, according toDetermine contact shield cover diameter D and be internal diameter of outer cover D1, D1It is not more than
Passed through in basic shell；
Step 3, according to formulaIt is determined that conductive shank diameter DG；
Step 4, it is determined that arriving in pole diameter D and shell through D1On the basis of design bellows, ripple pipe diameter DBMeet
DB=D1+ μ, μ are adjustment factor, and μ ∈ (0.5,2.5), the thickness H of bellowsB(mm) H is metB≈(0.121+0.0007DB)*
γ, γ ∈ [0.9,1.1].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146330.1A CN107863266A (en) | 2017-11-17 | 2017-11-17 | The arc quenching chamber structure and its design method of distribution vacuum switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146330.1A CN107863266A (en) | 2017-11-17 | 2017-11-17 | The arc quenching chamber structure and its design method of distribution vacuum switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107863266A true CN107863266A (en) | 2018-03-30 |
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ID=61702976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711146330.1A Pending CN107863266A (en) | 2017-11-17 | 2017-11-17 | The arc quenching chamber structure and its design method of distribution vacuum switch |
Country Status (1)
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| CN (1) | CN107863266A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1376634A1 (en) * | 2002-06-27 | 2004-01-02 | Schneider Electric Industries Sas | Vacuum tube for an electrical protection apparatus such as a switch or a circuit breaker |
-
2017
- 2017-11-17 CN CN201711146330.1A patent/CN107863266A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1376634A1 (en) * | 2002-06-27 | 2004-01-02 | Schneider Electric Industries Sas | Vacuum tube for an electrical protection apparatus such as a switch or a circuit breaker |
Non-Patent Citations (2)
| Title |
|---|
| 郭雪: "真空灭弧室的优化设计", 《中国优秀硕士学位论文全文数据库》 * |
| 陈志会: "投切电容器用40_5kV真空灭弧室的结构仿真与优化", 《中国优秀硕士学位论文全文数据库》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180330 |
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| RJ01 | Rejection of invention patent application after publication |