CN210957529U

CN210957529U - Rack transformer for 10kV distribution network overhead line

Info

Publication number: CN210957529U
Application number: CN201922489841.4U
Authority: CN
Inventors: 孔祥伦; 陈启升; 席昌文; 李亮; 陆高峰; 王劲; 刘江; 宋红飞; 黄天飞; 陆承虎; 方勇; 方杭军
Original assignee: Guizhou Power Grid Co Ltd
Current assignee: Guizhou Power Grid Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-07
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a rack becomes for 10kV joins in marriage net overhead line, it includes transformer, wire pole one and wire pole two, wire pole one is connected with two cross arms one about the wire pole two passes, place transformer and block terminal on cross arm one respectively, wire pole one upper portion sets up cross arm two, cross arm three and cross arm four, wire pole two upper portions set up cross arm five and cross arm six, cross arm two, cross arm three, cross arm four, cross arm five and cross arm six are parallel to each other and perpendicular with cross arm one, connect the high-pressure inlet wire on the cross arm two, establish the fuse on the cross arm three, establish the arrester on the cross arm four. The cross arm mutually perpendicular through installing transformer cross arm and high-voltage inlet wire arranges that when the maintenance of transformer, there is not the cross arm in the transformer top and hinders, hoist and mount convenience, high-voltage inlet wire arrange in wire pole top one side, the low pressure is qualified for the next round of competitions and is arranged at wire pole below opposite side, has effectively reduced the risk that main, subsidiary pole low pressure circuit overhauld the in-process personnel electrocute, has gained fine effect.

Description

Rack transformer for 10kV distribution network overhead line

Technical Field

The utility model relates to a rack becomes, especially relates to a rack becomes that is used for 10kV to join in marriage net overhead line, belongs to transmission line equipment technical field.

Background

With the gradual development of science and technology, the power distribution network has high requirements on safety and economy, and the safety performance of the power distribution network can be enhanced through reasonable configuration and installation, so that the economic benefit of the power distribution network is improved. At present, a distribution transformer rack becomes an important component of the structure of the whole power distribution network, in recent years, a standard rack (shown in figure 1) gradually covers unit power distribution networks of provinces and counties, operation maintenance work of an operator actually changes the standard rack is also increased, and through multiple times of investigation and practical experience, the traditional installation mode of the standard rack transformer has the following defects:

(1) when the standard rack is changed to replace the transformer, the transformer can be replaced by stopping the upper-stage switch, so that unnecessary power failure of a user is caused, and the power supply reliability and the customer satisfaction are influenced; secondly, the standard rack is difficult to hoist the transformer by using a crane.

(2) When the standard rack is changed into the main and auxiliary rods to maintain the low-voltage lines and eliminate the defects, the electric shock risk of people is higher when the distances between the low-voltage lines of the main and auxiliary rods and the upper-layer high-voltage fuse are too close.

(3) The transformer is overhauled and maintained on the standard rack transformer, and an operator easily touches the closed ground wire and does not meet related safety regulations.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the utility model provides a rack becomes for 10kV joins in marriage net overhead line, cross arm through the cross arm with installation transformer and the cross arm mutually perpendicular of high-pressure inlet wire arrange, like this, when the maintenance of transformer, join in marriage and become to pull out the back by the order gram, from making the high-voltage insulation wire of lower pile head to auxiliary rod and the distance of transformer mounted position satisfy hoist and mount safe distance requirement and hoist and mount convenience, the high-pressure inlet wire is arranged in wire pole top one side, and the low pressure is qualified for the next round of competitions and is arranged the opposite side in the wire pole below, then effectively reduced main, the risk that personnel electrocute in the auxiliary rod low pressure line maintenance process, effectively solve the operating personnel and join in marriage net standard rack and become the potential safety hazard that exists in the operation maintenance.

The technical scheme of the utility model is that: the utility model provides a rack becomes for 10kV joins in marriage net overhead line, it includes transformer, wire pole one and wire pole two are connected through two upper and lower cross arms one, place transformer and block terminal on cross arm one respectively, wire pole one will be higher than wire pole two, set up cross arm two, cross arm three and cross arm four respectively from top to bottom on the upper portion of wire pole one from top to bottom, set up cross arm five and cross arm six respectively from top to bottom on the upper portion of wire pole two, cross arm three, cross arm four, cross arm five and cross arm six are parallel to each other and perpendicular with cross arm one, connect the high-voltage inlet wire through the insulator cluster on the cross arm two, establish the fuse on the cross arm three, establish the arrester on the cross arm four.

And insulators are arranged on the fifth cross arm and the sixth cross arm, and the high-voltage incoming wires are connected to a high-voltage pile head of the transformer through parallel groove clamps, fuses and high-voltage overhead insulated wires for the insulators.

And a cable protection pipe and a meter box are further arranged at the lower part of the first telegraph pole, a low-voltage cable penetrates through two ends of the cable protection pipe and is respectively connected with a transformer low-voltage pile head and a distribution box of a transformer, and a low-voltage outlet wire is connected to the distribution box.

The arrester is connected with the grounding grid through the medium-voltage down lead.

The utility model has the advantages that: compared with the prior art, adopt the technical scheme of the utility model, cross arm through the cross arm that will install the transformer and the cross arm mutually perpendicular of high-pressure inlet wire arrange, like this, when the maintenance of transformer, join in marriage the change order and pull out the back, satisfy hoist and mount safe distance requirement and hoist and mount convenience from the distance that makes the high-voltage insulation wire of lower pile head to auxiliary rod and transformer mounted position, novel height pole rack becomes can just develop the transformer change operation under the only outage change fuse condition, and can use the crane to lift by crane, shorten the activity duration and reduce the power failure scope, promote customer satisfaction. High-voltage inlet wires are arranged on one side of the uppermost part of a telegraph pole, low-voltage outlet wires are arranged on the other side of the lower part of the telegraph pole, and the novel high-low pole rack is changed to effectively reduce the electric shock risk of personnel in the maintenance process of low-voltage lines of a main pole and an auxiliary pole. Novel height pole rack becomes has effectively prevented to touch at transformer maintenance in-process operation personnel mistake and has sealed earth connection problem.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Example 1: as shown in fig. 1, the rack transformer for 10kV distribution network overhead lines comprises a transformer 1, a first pole 5 and a second pole 6, wherein the first pole 5 and the second pole 6 are connected through a first upper cross arm 24 and a second lower cross arm 24, the transformer 1 and a distribution box 26 are respectively arranged on the first cross arm 24, the first pole 5 is higher than the second pole 6, the first pole 5 is provided with a second cross arm 29, a third cross arm 19 and a fourth cross arm 17 from top to bottom, the second pole 6 is provided with a fifth cross arm 27 and a sixth cross arm 28 from top to bottom, the second cross arm 29, the third cross arm 19, the fourth cross arm 17, the fifth cross arm 27 and the sixth cross arm 28 are parallel to each other and perpendicular to the first cross arm 24, the second cross arm 29 is connected with a high-voltage incoming line 21 through an insulator string 14, the third cross arm 19 is provided with a fuse 3, and the fourth cross arm 17 is provided with a lightning arrester 2.

And insulators 30 are arranged on the five cross arms 27 and the six cross arms 28, and the high-voltage incoming wires 21 are respectively connected to a transformer high-voltage pile head 11 of the transformer 1 through the parallel groove clamp 8, the fuse 3 and the insulators 30 by using high-voltage overhead insulating wires 22.

The lower part of the first utility pole 5 is also provided with a cable protection tube 20 and a meter box 25, the low-voltage cable 13 passes through two ends of the cable protection tube 20 and is respectively connected with a transformer low-voltage pile head 31 of the transformer 1 and a distribution box 26, and the low-voltage outlet 23 is connected to the distribution box 26.

The lightning arrester 2 is connected with the grounding grid 12 through a medium-voltage down lead 15.

A mounting method for a rack transformer of a 10kV distribution network overhead line comprises the following steps:

firstly, preparation before installation: a. the product meets the working requirement and is qualified by appearance inspection; b. tool preparation: the following installation tools were prepared: crowbar, pulley, set spanner, level bar, wire rope, straight tube funnel, double-arm bridge, insulation resistance meter and crane; c. preparing materials: the following mounting materials were prepared: the device comprises an electric pole, a low-voltage comprehensive distribution box, a cable protection pipe, a hoop, a lightning arrester, transformer oil, a high-low voltage insulated wire, a drop-out fuse, an insulated porcelain bottle, a cross arm, a transformer platform beam, a binding wire, an oil drum, square timber and an iron gasket; d. dressing and wearing: the working clothes, the working shoes and the safety helmets are worn correctly; e. checking a transformer rack: the material and quality accord with safety regulation, size load drawing design, and the rack installation is firm: the height is 2.5-3 m, the center distance between the two rods is 2.5-3 m, and the inclination is not more than 1% of the root of the rack;

secondly, transformer installation: f. appearance inspection before transformer installation: the model accords with the design requirement, the porcelain bushing is not damaged, the connecting bolts of each part are firm, each interface has no oil leakage, the appearance has no mechanical damage and corrosion, and the paint is intact; g. checking the installation direction and position of the transformer; h. positioning and adjusting a transformer and installing accessories;

thirdly, checking and testing before operation: i. checking the tap switch; j. measuring the direct current resistance of the winding; k. checking the high-voltage down lead and the low-voltage down lead and grounding; l, checking the porcelain bushing and the top bushing; m, impact test;

and fourthly, checking and accepting the transformer and putting the transformer into operation.

The cross arm through will installing the transformer and the cross arm mutually perpendicular of high-pressure inlet wire arrange, like this, when the maintenance of transformer, join in marriage the change order gram and draw the back open, satisfy hoist and mount safe distance requirement and hoist and mount convenience from the high-voltage insulation wire that makes lower pile head to auxiliary pole with the distance of transformer mounted position, novel height pole rack becomes can just carry out the transformer change operation under the only stop-match change fuse condition, and can use the crane to lift by crane, shorten the activity duration and reduce the power failure scope, promote customer satisfaction. High-voltage inlet wires are arranged on one side of the uppermost part of a telegraph pole, low-voltage outlet wires are arranged on the other side of the lower part of the telegraph pole, and the novel high-low pole rack is changed to effectively reduce the electric shock risk of personnel in the maintenance process of low-voltage lines of a main pole and an auxiliary pole. Novel height pole rack becomes has effectively prevented to touch at transformer maintenance in-process operation personnel mistake and has sealed earth connection problem.

The parts of the present invention not described in detail are the known techniques of those skilled in the art. Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a rack becomes for 10kV joins in marriage net overhead line, it includes transformer (1), wire pole one (5) and wire pole two (6) are connected through two upper and lower cross arms one (24), place transformer (1) and block terminal (26) respectively on cross arm one (24), its characterized in that: the utility model discloses a high-voltage wire pole, including wire pole one (5), cross arm two (29), cross arm three (19) and cross arm four (17), cross arm five (27) and cross arm six (28), cross arm two (29), cross arm three (19), cross arm four (17), cross arm five (27) and cross arm six (28) are parallel to each other and perpendicular with cross arm one (24) from top to bottom respectively to the upper portion of wire pole one (5) from top to bottom, connect high-voltage inlet wire (21) through insulator chain (14) on cross arm two (29), establish fuse (3) on cross arm three (19), establish arrester (2) on cross arm four (17).

2. The rack transformer for the 10kV distribution network overhead line of claim 1, characterized in that: insulators (30) are arranged on the five cross arms (27) and the six cross arms (28), and the high-voltage incoming wires (21) are connected to a transformer high-voltage pile head (11) of the transformer (1) through the parallel groove clamps (8), the fuse protector (3) and the insulators (30) through high-voltage overhead insulating wires (22).

3. The rack transformer for the 10kV distribution network overhead line of claim 1, characterized in that: the lower part of the first telegraph pole (5) is further provided with a cable protection pipe (20) and a meter box (25), a low-voltage cable (13) penetrates through two ends of the cable protection pipe (20) and is respectively connected with a transformer low-voltage pile head (31) of a transformer (1) and a distribution box (26), and a low-voltage outlet wire (23) is connected to the distribution box (26).

4. The rack transformer for the 10kV distribution network overhead line of claim 1, characterized in that: the lightning arrester (2) is connected with the grounding grid (12) through a medium-voltage down lead (15).