CN201312073Y - Contact box of moving-off type high-voltage switch cabinet - Google Patents
Contact box of moving-off type high-voltage switch cabinet Download PDFInfo
- Publication number
- CN201312073Y CN201312073Y CNU2008202157197U CN200820215719U CN201312073Y CN 201312073 Y CN201312073 Y CN 201312073Y CN U2008202157197 U CNU2008202157197 U CN U2008202157197U CN 200820215719 U CN200820215719 U CN 200820215719U CN 201312073 Y CN201312073 Y CN 201312073Y
- Authority
- CN
- China
- Prior art keywords
- contact box
- cylindrical shell
- cylinder body
- window
- voltage switchgear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
Disclosed is a contact box of a moving-off type high-voltage switch cabinet, which belongs to insulating members of power distribution devices. The contact box comprises a cylinder body, an installation flange and a window, wherein the installation flange extends to the external edge of the cylinder body, and the window used for a bus bar to pass in and out is disposed on the cylinder body and communicated with a cylinder cavity. The contact box is characterized in that the distance from an installation surface of the installation flange to the front end surface of the cylinder body is at least 50mm, the installation flange is provided with a screw-thread blind hole, an opening end of the screw-thread blind hole faces the direction of the rear end surface of the cylinder body, and a metallic plate or net is embedded in an inner wall of the cylinder cavity on the rear portion of the cylinder body. The contact box has the advantages of fine insulating property, long service life, safe and reliable operation, and being capable of ensuring the moving-off type high-voltage switch cabinet of a 24kV rated voltage class not to occur discharge breakdown in a test of 65kV power-frequency withstand voltage.
Description
Technical field
The utility model relates to a kind of contact box of moveable high-voltage switchgear, and particularly a kind of contact box of the indoor ac metal closing switch gear of armored withdraw type of 24kV grade of rated voltage belongs to the insulating element in the power distribution device.
Background technology
Contact box is the insulating protection spare when realizing being electrically connected between each function dolly and the cabinet in the moveable high-voltage switchgear, and the quality of its insulation property can have influence on the security reliability that moveable high-voltage switchgear moves.The contact box of existing application in the moveable high-voltage switchgear of 24kV grade of rated voltage, its version is that direct contact box with the 10kV grade of rated voltage simply amplifies on volume, the contact box of this version, the deficiency that exists is: at first, it can only bear one minute 50kV power frequency withstand test, and when the 65kV power-frequency voltage is tested, meeting electrical breakdown between each function dolly and metal partion (metp), produce sparkover, the switchgear that therefore can not satisfy the national standard requirement can bear one minute 65kV power frequency withstand test; Secondly,, can produce corona discharge between the barrel of contact box and metal partion (metp), have a strong impact on the useful life of contact box because distance is little between the upper and lower contact box of 24kV switchgear, and is provided with metal partion (metp) between upper and lower contact box.
Summary of the invention
The purpose of this utility model provides that a kind of structure is provided with rationally, long service life, can satisfy the requirement of 65kV industrial frequency withstand voltage and contact box that be applicable to the moveable high-voltage switchgear of 24kV grade of rated voltage.
The purpose of this utility model is to realize like this, a kind of contact box of moveable high-voltage switchgear, comprise cylindrical shell 1, be arranged on the mounting flange 2 on cylindrical shell 1 outer, and the window 4 that is used for supplying the busbar turnover that is located on the cylindrical shell 1 and communicates with the tube chamber, be characterized in: the installed surface 21 on the described mounting flange 2 is at least 50mm to the distance between the front end face 11 of cylindrical shell 1, and on mounting flange 2, offer tapped blind hole 23, the openend of this tapped blind hole 23 is embedded with metallic plate or net 3 towards rear end face 12 directions of cylindrical shell 1 on the tube cavity wall at described cylindrical shell 1 rear portion.
The end face 41 of window 4 described in the utility model is higher than the end face of flange 22 of described mounting flange 2.
The shape of cross section of window 4 described in the utility model is a rectangle.
2 windows 4 described in the utility model are the upper and lower that is arranged on cylindrical shell 1 symmetrically, and communicate with the tube chamber of cylindrical shell 1 respectively.
The utility model is provided with full skirt 42 on the outer of described window 4.
The beneficial effects of the utility model: by the installed surface on the mounting flange 2 21 being arranged on apart from the front end face 11 of cylindrical shell 1 50mm place at least; Tapped blind hole on the mounting flange 2 23 is offered towards rear end face 12 directions of cylindrical shell 1, make contact box be installed in the rear portion of the head of the screw 7 that matches with tapped blind hole 23 behind the moveable high-voltage switchgear inside towards contact box, promptly be in the rear portion of mounting flange 2, the head of different and existing 10kV moveable high-voltage switchgear inner bolt exposes the front portion at mounting flange 2, promptly towards the front end face of contact box, compared with prior art, increased electrified body on the metal partion (metp) 6 that is used for fixing in the electrified body of contact arm 5 of circuit breaker dolly or other dollies that match with moveable high-voltage switchgear and the moveable high-voltage switchgear (because the head of prior art screw exposes the front portion at mounting flange 2 with mounting flange 2, electrified body is the head of this screw) between air line distance, thereby increased electric clearance, strengthened dielectric strength; Bury metallic plate or net 3 by tube underground on the cavity wall, thereby improved the insulation property of contact box, simultaneously, can effectively avoid the corona discharge that produces between the barrel of contact box and the metal partion (metp), prolong the useful life of contact box at cylindrical shell 1 rear portion.By the improvement of above-mentioned three aspects, guaranteed that the moveable high-voltage switchgear of 24kV grade of rated voltage can in the 65kV power frequency withstand test discharge breakdown phenomenon not take place at one minute, safe and reliable to operation.
Description of drawings
Fig. 1 is a planar structure schematic diagram of the present utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is an application examples schematic diagram of the present utility model.
Fig. 5 is an Another Application illustration intention of the present utility model.
Embodiment
By the description of applicant, will help to understand the utility model more, and good effect of the present utility model is embodied more, but embodiment should not be considered as the restriction to some extent to the utility model scheme embodiment.
See also Fig. 1 and in conjunction with Fig. 2, Fig. 3, the contact box of the utility model moveable high-voltage switchgear comprises the cylindrical shell 1 in the middle tool tube chamber that employing insulating material such as epoxy molding form, tube at cylindrical shell 1 rear portion is embedded with on the cavity wall so that electric field even metal plate or net 3, extends mounting flange 2 integratedly and be used for for the busbar turnover and window 4 that connect with the tube chamber on the outer of cylindrical shell 1.Described mounting flange 2 is arranged on the front portion of cylindrical shell 1, and guarantee that the distance L between the front end face 11 of installed surface 21 on the mounting flange 2 and cylindrical shell 1 is at least 50mm, on mounting flange 2, also offer tapped blind hole 23, this tapped blind hole 23 is offered towards rear end face 12 directions of cylindrical shell 1, joins the connection that can realize between contact box and the metal partion (metp) 6 by revolving of tapped blind hole 23 and screw 7.
See also Fig. 4, tapped blind hole 23 is offered towards rear end face 12 directions of cylindrical shell 1, make contact box be installed in rear end face 12 directions of the head of the screw 7 that matches with tapped blind hole 23 behind the moveable high-voltage switchgear inside towards contact box, promptly be in the back that is used for the metal partion (metp) 6 that fixes with mounting flange in mounting flange 2 and the moveable high-voltage switchgear, this moment circuit breaker dolly or other dollies that match with moveable high-voltage switchgear the electrified body of contact arm 5 and the air line distance between the electrified body on the metal partion (metp) 6 be D; And the head of existing 10kV moveable high-voltage switchgear inner bolt exposes in the mounting flange front portion, promptly towards the front end face of contact box, this moment, the electrified body on the metal partion (metp) 6 was the head of screw, and is apparent: D is greater than the distance between the head of the electrified body of the contact arm of dolly in the existing 10kV moveable high-voltage switchgear and screw.Therefore increase electric clearance, strengthened dielectric strength.
The utility model is installed like this: screw 7 passes the metal partion (metp) 6 of removing high-tension switch cabinet from the contact box rear portion, be screwed in the tapped blind hole 23 on the mounting flange 2, the installed surface 21 of mounting flange 2 back is fitted with metal partion (metp) 6, contact box is fixed on the metal partion (metp) 6 in the moveable high-voltage switchgear, and the window 4 of bus 9 by contact box fixes with the fixed contact 8 at contact box rear portion.When the circuit breaker dolly pushes moveable high-voltage switchgear, the fixed contact 8 in its contact arm 5 and the contact box contacts, treat breaker closing after, whole moveable high-voltage switchgear charging operation.
Claims (6)
1, a kind of contact box of moveable high-voltage switchgear, comprise cylindrical shell (1), be arranged on the mounting flange (2) on cylindrical shell (1) outer, and the window (4) that is used for supplying the busbar turnover that is located on the cylindrical shell (1) and communicates with the tube chamber, it is characterized in that the installed surface (21) on the described mounting flange (2) is at least 50mm to the distance between the front end face (11) of cylindrical shell (1), and on mounting flange (2), offer tapped blind hole (23), the openend of this tapped blind hole (23) is embedded with metallic plate or net (3) towards rear end face (12) direction of cylindrical shell (1) on the tube cavity wall at described cylindrical shell (1) rear portion.
2, the contact box of moveable high-voltage switchgear according to claim 1 is characterized in that the end face (41) of described window (4) is higher than the end face of flange (22) of described mounting flange (2).
3, the contact box of moveable high-voltage switchgear according to claim 1, the shape of cross section that it is characterized in that described window (4) is a rectangle.
4, the contact box of moveable high-voltage switchgear according to claim 1 is characterized in that described window (4) is 1 or 2.
5, the contact box of moveable high-voltage switchgear according to claim 4 is characterized in that described 2 windows (4) are the upper and lower that is arranged on cylindrical shell (1) symmetrically, and communicates with the tube chamber of cylindrical shell (1) respectively.
6,, it is characterized in that on the outer of described window (4), being provided with full skirt (42) according to the contact box of claim 1 or 4 described moveable high-voltage switchgears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202157197U CN201312073Y (en) | 2008-11-07 | 2008-11-07 | Contact box of moving-off type high-voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202157197U CN201312073Y (en) | 2008-11-07 | 2008-11-07 | Contact box of moving-off type high-voltage switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201312073Y true CN201312073Y (en) | 2009-09-16 |
Family
ID=41109328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202157197U Expired - Lifetime CN201312073Y (en) | 2008-11-07 | 2008-11-07 | Contact box of moving-off type high-voltage switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201312073Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969181A (en) * | 2010-10-14 | 2011-02-09 | 句容市华通电器有限公司 | Contact box |
| CN104966994A (en) * | 2015-07-16 | 2015-10-07 | 浙江雷安电气有限公司 | Three-phase shielding contact box |
-
2008
- 2008-11-07 CN CNU2008202157197U patent/CN201312073Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969181A (en) * | 2010-10-14 | 2011-02-09 | 句容市华通电器有限公司 | Contact box |
| CN104966994A (en) * | 2015-07-16 | 2015-10-07 | 浙江雷安电气有限公司 | Three-phase shielding contact box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090916 |
|
| CX01 | Expiry of patent term |