CN201608451U - Fixed contact cover for withdrawable metal-enclosed switchgear - Google Patents
Fixed contact cover for withdrawable metal-enclosed switchgear Download PDFInfo
- Publication number
- CN201608451U CN201608451U CN200920265746XU CN200920265746U CN201608451U CN 201608451 U CN201608451 U CN 201608451U CN 200920265746X U CN200920265746X U CN 200920265746XU CN 200920265746 U CN200920265746 U CN 200920265746U CN 201608451 U CN201608451 U CN 201608451U
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- CN
- China
- Prior art keywords
- cover
- fixed contact
- shield
- enclosed switchgear
- stationary contact
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- Expired - Lifetime
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Abstract
The utility model relates to a fixed contact cover for a withdrawable metal-enclosed switchgear, comprising a cover body consisting of a cover wall and a cover top, wherein the cover wall is provided with a venthole. The fixed contact cover for the withdrawable metal-enclosed switchgear is characterized in that the cover wall is also provided with a ventilation opening opposite to the position of the venthole in a radial direction. On the basis of the original fixed contact cover provided with a venthole, the fixed contact cover for the withdrawable metal-enclosed switchgear has the structure that the cover wall is additionally provided with the ventilation opening, and air can directly flow through the fixed contact cover between the venthole and the ventilation opening so that heat can be thoroughly dissipated and the temperature of each connection point in the fixed contact cover can not rise excessively, thereby effectively solving the problem of heat dissipation of the connection point between a moving contact and the fixed contact, the connection point between the fixed contact and a busbar as well as the fixed contact of the heavy current withdrawable metal-enclosed switchgear.
Description
Technical field
The utility model relates to a kind of stationary contact head-shield of withdraw type metal enclosed switchgear, more particularly, relates to a kind of stationary contact head-shield that is used for the withdraw type metal enclosed switchgear of big electric current.
Background technology
Withdraw type metal enclosed switchgear has moving contact and fixed contact, and during work, moving contact can be under operating personnel control, being electrically connected of connection or disconnection and fixed contact.The stationary contact head-shield of withdraw type metal enclosed switchgear designs for the contact that seals moving contact and fixed contact, it is installed between the forward and backward cabinet of withdraw type metal enclosed switchgear, connect for removing copper bar, moving contact passes in and out outside the necessary perforate, and remainder all seals the hood configuration of isolation.When moving contact and fixed contact were electrically connected, itself all was housed in the contact of the contact of moving contact and fixed contact, fixed contact and bus and fixed contact in the stationary contact head-shield.Because each contact and dynamic and static contact itself have resistance, under the situation that has electric current to pass through, can generate heat, if electric current is very big, the heat that produces will be more, if heat can not in time be distributed, each member temperature raises too much above setting, just is easy to cause member to burn the adverse consequences that switchgear damages.
As shown in Figures 1 and 2, existing stationary contact head-shield is except that the bottom surface has moving contact import and export, just only open a ventilating opening on cover body, and the cover top is sealed, air-flow can only flow by a space between moving contact and the stationary contact head-shield and an only ventilating opening like this, greatly reduce air velocity, corresponding, also just slowed down the speed of dispelling the heat greatly; In addition, contact size design in the big electric current cabinet is corresponding bigger, cause the space between moving contact and the stationary contact head-shield too narrow, the air flows in the stationary contact head-shield is subjected to further obstruction, and the end face of adding the stationary contact head-shield has the existence of convex edge, make top part hot gas to overflow, and accumulate in the top, make fixed contact heat radiation difficulty more, and the heat that produces during big electric current cabinet work is more, therefore temperature can very fast rising, causes adverse consequences.
The utility model content
The purpose of this utility model is to provide a kind of stationary contact head-shield that is used for the withdraw type metal enclosed switchgear of big electric current, this stationary contact head-shield can effectively improve switchgear, the heat dissipation problem of the moving contact of the withdraw type metal enclosed switchgear of particularly big electric current and the contact of fixed contact, fixed contact and bus contact and fixed contact itself reduces the probability that switchgear is burnt out because described contact temperature rise is too high.
The purpose of this utility model is achieved through the following technical measures:
A kind of stationary contact head-shield comprises the cover body that is made of cover wall and cover top, has a ventilation hole on the cover wall, it is characterized in that: also have a ventilating opening on the described cover body in addition.
The position of described ventilation hole and ventilating opening is radially relative.
Described ventilating opening is opened on the cover wall, and opening formed the ventilating opening passage towards the axial blind hole on cover top before this, and the bottom of axial blind hole has radial opening and is communicated with mask body intracavity.
Described ventilating opening is opened at the roof of cover body in the position near sidewall.
Advantage of the present utility model is: increase a ventilating opening again on the basis of the stationary contact head-shield that has a ventilation hole, gas can be directly from the described stationary contact head-shield of flowing through between ventilation hole and the ventilating opening, heat is fully distributed, thereby make each contact temperature in the stationary contact head-shield be unlikely to raise too much, solved moving contact and contact, fixed contact and the bus contact of fixed contact and the heat dissipation problem of fixed contact itself of the withdraw type metal enclosed switchgear of big electric current effectively.
Description of drawings
Below in conjunction with description of drawings and preferred embodiment the utility model is described further.
Fig. 1 is the stereogram of existing stationary contact head-shield;
Fig. 2 is the profile of Fig. 1;
Fig. 3 is existing stationary contact head-shield air flow direction schematic diagram;
Fig. 4 is the stereogram of stationary contact head-shield preferred embodiment of the present utility model;
Fig. 5 is the profile of Fig. 4;
Fig. 6 is the air flow direction schematic diagram of stationary contact head-shield of the present utility model.
Embodiment
Fig. 1,2 is the profile and the stereogram of existing stationary contact head-shield, and Fig. 3 is local air flow schematic diagram in the switchgear of using existing stationary contact head-shield.As can be seen from FIG., moving contact and the space between the stationary contact head-shield in the big electric current cabinet are too narrow, air flows in the stationary contact head-shield is hindered, the end face of adding the stationary contact head-shield has the existence of convex edge, make top part hot gas to overflow, and accumulate in the top, make fixed contact heat radiation difficulty more.
Shown in Fig. 4,5, the stationary contact head-shield shown in this preferred embodiment comprises the cover body 1 that is made of cover wall and cover top, has a ventilation hole 3 and a ventilating opening 2 radially relative with ventilation hole 3 on the cover wall.
Described ventilating opening 2 is opened at the roof of cover body in the position near sidewall, and opening forms the ventilating opening passage towards the axial blind hole on cover top before this, and the bottom of axial blind hole has radial opening and is communicated with mask body intracavity.
As shown in Figure 6, owing on the cover wall, increasing a ventilating opening on the basis of original stationary contact head-shield, gas can be directly from the Contact Cover of flowing through between ventilation hole 3 and the ventilating opening 2, heat is fully distributed, thereby make each contact temperature in the stationary contact head-shield be unlikely to raise too much, solved moving contact and contact, fixed contact and the bus contact of fixed contact and the heat dissipation problem of fixed contact itself of the withdraw type metal enclosed switchgear of big electric current effectively.
Claims (4)
1. the stationary contact head-shield of a withdraw type metal enclosed switchgear comprises the cover body that is made of cover wall and cover top, has a ventilation hole (3) on the cover wall, it is characterized in that: also have a ventilating opening (2) on the described cover body in addition.
2. stationary contact head-shield as claimed in claim 1 is characterized in that: described ventilation hole (3) is radially relative with the position of ventilating opening (2).
3. stationary contact head-shield as claimed in claim 1 or 2 is characterized in that: described ventilating opening (2) is opened on the cover wall, and opening formed the ventilating opening passage towards the axial blind hole on cover top before this, and the bottom of axial blind hole has radial opening and is communicated with mask body intracavity.
4. stationary contact head-shield as claimed in claim 1 or 2 is characterized in that: described ventilating opening (2) is opened at the roof of cover body in the position near sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920265746XU CN201608451U (en) | 2009-12-28 | 2009-12-28 | Fixed contact cover for withdrawable metal-enclosed switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920265746XU CN201608451U (en) | 2009-12-28 | 2009-12-28 | Fixed contact cover for withdrawable metal-enclosed switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201608451U true CN201608451U (en) | 2010-10-13 |
Family
ID=42953152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920265746XU Expired - Lifetime CN201608451U (en) | 2009-12-28 | 2009-12-28 | Fixed contact cover for withdrawable metal-enclosed switchgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201608451U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124087A (en) * | 2014-07-30 | 2014-10-29 | 广东必达电器有限公司 | Isolation knife of large-current switch cabinet |
| US9685768B2 (en) | 2013-06-13 | 2017-06-20 | General Electric Company | Spout for switchgear, switchgear having spout, and method thereof |
| CN110739632A (en) * | 2018-07-20 | 2020-01-31 | 平高集团有限公司 | kinds of contact box and switch cabinet using same |
-
2009
- 2009-12-28 CN CN200920265746XU patent/CN201608451U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9685768B2 (en) | 2013-06-13 | 2017-06-20 | General Electric Company | Spout for switchgear, switchgear having spout, and method thereof |
| CN104124087A (en) * | 2014-07-30 | 2014-10-29 | 广东必达电器有限公司 | Isolation knife of large-current switch cabinet |
| CN110739632A (en) * | 2018-07-20 | 2020-01-31 | 平高集团有限公司 | kinds of contact box and switch cabinet using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 510460 Guangdong, Baiyun District, Guangzhou City, South Hill Road, No. 18 Patentee after: Guangzhou Baiyun Electric Equipment Co., Ltd. Address before: 510460, Daling Road, 18, Kamiyama Industrial Zone, Baiyun District, Guangdong, Guangzhou Patentee before: Guangzhou Baiyun Electric Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101013 |