CN111952844B

CN111952844B - Transformer substation's secondary minibus prevents mistake protective housing

Info

Publication number: CN111952844B
Application number: CN202010729355.XA
Authority: CN
Inventors: 徐斐; 陈小平; 吴化宇; 李志强; 罗贺; 林科耀; 雷长沂; 谢传真; 魏遥; 魏柏; 巫锡华
Original assignee: State Grid Fujian Electric Power Co Ltd; Sanming Power Supply Co of State Grid Fujian Electric Power Co Ltd
Current assignee: State Grid Fujian Electric Power Co Ltd; Sanming Power Supply Co of State Grid Fujian Electric Power Co Ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2022-04-19
Anticipated expiration: 2040-07-27
Also published as: CN111952844A

Abstract

The invention relates to a transformer substation secondary small bus anti-misoperation protective shell which comprises a protective shell body arranged on a small bus clamp; the small bus clamp comprises two isolation plates which are vertically and parallelly arranged; a top wiring terminal and a side wiring terminal are sequentially fixed between the two isolation plates from top to bottom, and a small bus is detachably fixed between the top wiring terminal and the side wiring terminal; the protective shell body is of an arch structure with the lower end open; the end surfaces of two sides of the protective shell body are respectively attached to the end surfaces of the inner sides of the two isolation plates; the protective shell body covers the top wiring terminal; the two end parts of the protective shell body are downwards provided with through avoidance grooves; the small bus can penetrate out of the avoidance groove. This protective housing simple structure is reliable, and easy operation applies to little generating line normal operating or the process of taking off and connect, prevents effectively that screen top little generating line from guaranteeing electric wire netting, equipment, personal safety because of the artificial reason maloperation, has improved the operation security.

Description

Transformer substation's secondary minibus prevents mistake protective housing

Technical Field

The invention relates to a transformer substation secondary small bus anti-error protection shell, and belongs to the technical field of transformer substation equipment.

Background

As is known, the protective screens in substations are mostly connected by screen top busbars, which are usually copper bars with a diameter of 6 mm or 8 mm. In a protection screen cabinet in a transformer substation, a screen top small bus is used as a channel for collecting, distributing and transmitting alternating-current secondary voltage signals, exists in a transformer substation relay protection room in large quantity, and has important significance on secondary devices such as transformer substation protection, measurement and metering, and therefore whether the small bus operates stably or not influences an alternating-current and direct-current system, which is the important factor for safe operation of the transformer substation.

The screen top busbar mostly adopts whole root intercommunication to lay, in the transformation construction of secondary device such as protection of transformer substation, measurement, relates to electrified the operation of tearing open, connecing the busbar frequently, and the mistake bumps electrified busbar and can cause bodily injury, can lead to screen top busbar short circuit, ground connection simultaneously, influences secondary equipment's normal operating, serious can influence the safety and stability operation of electric wire netting even. In order to ensure the reliability of power supply, generally, live working is required for removing the screen top small bus. Meanwhile, the small bus is laid on the top of the protection screen and is more than 2 meters away from the ground, so that the high-altitude operation is realized during operation, the operation space is narrow (the distance between the axes of the small buses on the same floor is only 30mm, and the distance between the small buses on the upper layer and the lower layer is only 60mm), all the wiring screws are located at the lower end of the small bus, and the screw is difficult to get down when a screwdriver is used for disassembling the screws and pressing hard wires, so that the time and labor are consumed, and operation danger points are many.

At present, in a relay protection room of a transformer substation, a relatively common screen top small bus protection tool mainly comprises a heat shrink tube, a dust cover, an error prevention cover and the like. Wherein, the protection zone of pyrocondensation pipe, mistake lid of preventing exists the protection blind area, can not protect the binding post of the side of generating line clamp and the little generating line portion that does not have the pyrocondensation, and the dust cover is effectual when normal operating, and the process of taking apart need lift the dust cover, and whole screen top loses the barrier propterty completely, and present technical scheme all can't carry out comprehensive protection to screen top little generating line.

Disclosure of Invention

In order to overcome the problems, the invention provides the transformer substation secondary small bus anti-error protection shell which is simple and reliable in structure and simple in operation, is applied to normal operation of a small bus or the processes of detaching and connecting the small bus, effectively prevents the screen top small bus from being mistakenly short-circuited, mistakenly touched and mistakenly grounded due to human reasons, guarantees the safety of a power grid, equipment and personnel, and improves the operation safety.

The technical scheme of the invention is as follows:

a transformer substation secondary small bus anti-misoperation protective shell comprises a protective shell body arranged on a small bus clamp; the small bus clamp comprises two isolation plates which are vertically and parallelly arranged; a top wiring terminal and a side wiring terminal are sequentially fixed between the two isolation plates from top to bottom, and a small bus is detachably fixed between the top wiring terminal and the side wiring terminal; the protective shell body is of an arch structure with the lower end open; the end surfaces of two sides of the protective shell body are respectively attached to the end surfaces of the inner sides of the two isolation plates; the protective shell body covers the top wiring terminal; the two end parts of the protective shell body are downwards provided with through avoidance grooves; the small bus can penetrate out of the avoidance groove.

Furthermore, the protective shell body comprises a rectangular cover and two U-shaped covers which are respectively fixed at two ends of the two rectangular covers; the U-shaped cover is opened downwards; the lower end and two sides of the rectangular cover are arranged in an open manner; the end surfaces of two sides of the rectangular cover are respectively attached to the end surfaces of the inner sides of the two isolation plates; the rectangular cover is arranged above the top wiring terminal; the side plates at two ends of the rectangular cover are fixed with the U-shaped cover; the side plate is provided with a transversely through open slot; the opening of the U-shaped cover is communicated with the open slot; the small bus bar can be received within an opening of the U-shaped cover.

Furthermore, a funnel-shaped necking part is also fixed between the side plate and the U-shaped cover; the lower end of the necking part is arranged in an open manner; the caliber of the necking part is gradually reduced from the side plate to the U-shaped cover; the opening of the necking part is respectively communicated with the opening of the U-shaped cover and the open slot.

Furthermore, a vertical mounting handle is fixed above the necking part; the end surface of the inner side of the mounting handle is fixed with the outer side of the side plate; and the middle part of the mounting handle is provided with a through hole.

Furthermore, an installation plate is fixed at the upper end of the rectangular cover; the mounting plate comprises a horizontal pressing plate and two upright posts which are vertically and symmetrically fixed at the lower end of the pressing plate; the lower end of the upright post is fixed on the rectangular cover.

Further, the protective shell body is made of a photosensitive insulating resin material.

The invention has the following beneficial effects:

1. this protective housing simple structure is reliable, and easy operation, applies to little generating line normal operating or tears open, connects little generating line process, prevents effectively that screen top little generating line from touching, misconnection ground because of artificial reason mistake short circuit, mistake, ensures electric wire netting, equipment, personal safety, has improved the operation security.

2. This protective housing will prevent that the error capability widens to the protection blind area of traditional mode, realizes the screen top little generating line and the all-round protection of generating line clamp binding post thereof, can both stabilize the protection when little generating line daily operation or live working, cutting, guarantees little generating line safe operation, the guarantee personal and electric wire netting safety.

3. This protective housing passes through computer aided design technique and 3D printing technique, develops the general type that is applicable to multiple screen cabinet and prevents mistake utensil, and the device adopts both sides parcel formula design, has designed unique opening infundibulate structure and opening U-shaped structure, and the cooperation pyrocondensation pipe can realize 100% protection to the screen top minibus.

4. Through design installation handle (or mounting panel), can be more convenient carry out dismouting work to preventing the mistake utensil, even at narrow and small adjustment that still can be convenient in space, promoted the operability, the security of this protective housing.

5. The protective shell uses photosensitive insulating resin as a material, has the advantages of high mechanical strength and difficult fracture, is convenient to use on a construction site, and simultaneously has the characteristics of strong thermal stability, flame retardance and insulation, thereby well meeting the requirements of the small bus in an actual operation state.

Drawings

Fig. 1 is an overall structure schematic diagram of the protective shell body when mounted on a small bus bar clamp.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a schematic structural view of a protective case body according to a first embodiment of the present invention.

Fig. 5 is a front view of fig. 4.

Fig. 6 is a half sectional view of a protective case body according to a first embodiment of the present invention.

Fig. 7 is a schematic structural view of a protective case body according to a second embodiment of the present invention.

Fig. 8 is a left side view of fig. 7.

The reference numbers in the figures denote:

1. a protective shell body; 11. a rectangular cover; 111. a side plate; 112. an open slot; 12. a necking part; 13. a U-shaped cover; 14. installing a handle; 141. a through hole; 15. mounting a plate; 151. a column; 152. pressing a plate; 2. a small bus clamp; 21. a separator plate; 22. a top terminal block; 23. side connection terminals; 24. and (4) a small bus.

Detailed Description

The invention is described in detail below with reference to the figures and the specific embodiments.

The first embodiment is as follows:

referring to fig. 1-6, a transformer substation secondary small bus anti-misoperation protective shell comprises a protective shell body 1 installed on a small bus clamp 2; the small bus-bar clamp 2 comprises two vertical and parallel isolation plates 21; a top wiring terminal 22 and a side wiring terminal 23 are sequentially fixed between the two isolation plates 21 from top to bottom, and a small bus 24 is detachably fixed between the top wiring terminal 22 and the side wiring terminal 23; the protective shell body 1 is of an arch structure with the lower end open; the end surfaces of two sides of the protective shell body 1 are respectively attached to the end surfaces of the inner sides of the two isolation plates 21; the protective shell body 1 covers the top wiring terminal 22; the end parts of the two ends of the protective shell body 1 are downwards provided with through avoidance grooves; the small bus bar 24 can penetrate out of the avoidance slot.

Through analyzing among the electric power system, the installation condition of protection screen cabinet top secondary minibus 24 commonly used and the structure of minibus 24 erection terminal, find that the minibus prevents mistake the protective housing and only need match on the minibus presss from both sides 2, the general structure of erection terminal can lean on the part that covers the 24 erection terminal of secondary minibus, and the pyrocondensation pipe of deuterogamying can eliminate minibus 24 and all exposed parts of metal of generating line clamp binding post basically, can reliably protect the minibus 24 in service.

According to the above description, the small bus bar clamp 2 is a structure for mounting the small bus bar 24 in a protection screen cabinet commonly used in the power system. Arched protective housing body 1 is installed on little generating line presss from both

sides

2, and 1 both sides terminal surface of protective housing body pastes respectively in the medial surface terminal surface of two division boards 21, and protective housing body 1 lid is in top binding post 22 top, and the groove of dodging that supplies little generating line 24 to wear out is seted up again to protective housing body 1 both ends tip. Thus, the protective shell body 1 can be matched with the small bus clamp 2 to cover the top wiring terminal 22 and the side wiring terminal 23, and the small bus 24 in operation can be reliably protected.

Further, the protective shell body 1 comprises a rectangular cover 11 and two U-shaped covers 13 which are respectively fixed at two ends of the two rectangular covers 11; the U-shaped cover 13 is opened downwards; the lower end and two sides of the rectangular cover 11 are opened; the end surfaces of two sides of the rectangular cover 11 are respectively attached to the end surfaces of the inner sides of the two isolation plates 21; the rectangular cover 11 covers the top wiring terminals 22; the side plates 111 at two ends of the rectangular cover 11 are fixed with the U-shaped cover 13; the side plate 111 is provided with a transversely through open slot 112; the opening of the U-shaped cover 13 is communicated with the open slot 112; the small bus bar 24 can be accommodated in an opening of the U-shaped cover 13.

According to the above description, according to the shape of the small bus bar clamp 2 commonly used for the secondary equipment cubicle, the rectangular cover 11 with a rectangular opening is designed in the middle of the protective shell body 1 for shielding the main body of the small bus bar clamp 2 and the top connecting terminal 22; to the protection blind areas such as the side terminal 23 of the side of little generating line clamp 2 both sides and little generating line 24 not pyrocondensation portion, then adopted both sides parcel formula design, designed the U-shaped cover 13 that can wrap up side terminal 23 and little generating line 24 in rectangle cover 11 both sides, U-shaped cover 13 is used for wrapping up the not pyrocondensation portion of little generating line 24, prevents that instrument or human mistake from bumping little generating line 24 during the operation.

Furthermore, a funnel-shaped necking part 12 is fixed between the side plate 111 and the U-shaped cover 13; the lower end of the throat part 12 is opened; the aperture of the throat 12 is gradually reduced from the side plate 111 toward the U-shaped cover 13; the opening of the choke portion 12 is communicated with the opening of the U-shaped cover 13 and the opening groove 112 respectively.

According to the above description, the two ends of the funnel-shaped reducing portion 12 are respectively connected to the rectangular cover 11 and the U-shaped cover 13, and meanwhile, the funnel-shaped reducing portion 12 can protect the side connection terminals 23 at the two sides of the small bus bar clamp 2, so as to prevent the side connection terminals 23 from being touched by a tool or a human body in operation; at the same time, due to the funnel-shaped structure, no obstruction is caused to the operation on the adjacent small bus bar 24.

Further, a vertical mounting handle 14 is fixed above the throat part 12; the end surface of the inner side of the mounting handle 14 is fixed with the outer side of the side plate 111; the middle part of the mounting handle 14 is provided with a through hole 141.

According to the description, in the process of constructing the transformer substation screen top, the secondary small bus 24 on the protection screen cabinet screen top needs to be installed and removed frequently, and the short circuit or grounding of the secondary small bus 24 is easily caused by the mistaken touch of workers. Meanwhile, when the small bus 24 is removed and installed, the conventional protective device can cause the situation of mistaken collision. Therefore, in order to ensure that other adjacent small buses 24 are not mistakenly touched and mistakenly shortened in the dismounting and mounting processes, the mounting handles 14 are specially designed on the necking parts 12 on the two sides, the through holes 141 are grabbed, dismounting and mounting work can be conveniently carried out on the protective shell, even if the protective shell is still convenient to adjust in a narrow space, and the operability and the safety of the protective shell are improved.

Further, the protective shell body 1 is made of a photosensitive insulating resin material.

According to the description, the protective shell is made of the photosensitive resin material commonly used in 3D printing, and the strength, the thermal stability, the flame retardance and the insulativity of the protective shell can well meet the requirements of the small bus in the actual running state.

Example two:

referring to fig. 7-8, a transformer substation secondary small bus anti-error protection casing, the embodiment only differs from the first embodiment in that a mounting plate 15 is used instead of a mounting handle 14.

The mounting plate 15 is fixed at the upper end of the rectangular cover 11; the mounting plate 15 comprises a horizontal pressing plate 152 and two upright posts 151 vertically and symmetrically fixed at the lower end of the pressing plate 152; the lower end of the upright 151 is fixed on the rectangular cover 11.

According to the above description, the present embodiment employs the mounting plate 15 instead of the mounting handle 14. The mounting plate 15 is fixed above the rectangular cover 11, so that the protective shell can be more conveniently disassembled and assembled. The press plate 152 also facilitates pressing the protective case onto the small bus bar 2.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a transformer substation's secondary minibus prevents mistake protective housing which characterized in that: comprises a protective shell body (1) arranged on a small bus clamp (2); the small bus clamp (2) comprises two vertical and parallel isolation plates (21); a top wiring terminal (22) and a side wiring terminal (23) are sequentially fixed between the two isolating plates (21) from top to bottom, and a small bus (24) is detachably fixed between the top wiring terminal (22) and the side wiring terminal (23); the protective shell body (1) is of an arch structure with the lower end open; the end surfaces of two sides of the protective shell body (1) are respectively attached to the end surfaces of the inner sides of the two isolation plates (21); the protective shell body (1) covers the top wiring terminal (22); the end parts of the two ends of the protective shell body (1) are downwards provided with through avoidance grooves; the small bus (24) can penetrate out of the avoidance groove;

the protective shell body (1) comprises a rectangular cover (11) and two U-shaped covers (13) which are respectively fixed at two ends of the two rectangular covers (11); the U-shaped cover (13) is opened downwards; the lower end and two sides of the rectangular cover (11) are arranged in an open manner; the end surfaces of two sides of the rectangular cover (11) are respectively attached to the end surfaces of the inner sides of the two isolation plates (21); the rectangular cover (11) covers the top wiring terminal (22); the side plates (111) at two ends of the rectangular cover (11) are fixed with the U-shaped cover (13); the side plate (111) is provided with a transversely through open slot (112); the opening of the U-shaped cover (13) is communicated with the open slot (112); the small bus bar (24) can be accommodated in an opening of the U-shaped cover (13).

2. The substation secondary small bus anti-misoperation protective shell according to claim 1, characterized in that: a funnel-shaped necking part (12) is further fixed between the side plate (111) and the U-shaped cover (13); the lower end of the necking part (12) is opened; the caliber of the necking part (12) is gradually reduced from the side plate (111) to the U-shaped cover (13); the opening of the necking part (12) is respectively communicated with the opening of the U-shaped cover (13) and the opening groove (112).

3. The substation secondary small bus anti-misoperation protective shell according to claim 2, characterized in that: a vertical mounting handle (14) is fixed above the necking part (12); the end surface of the inner side of the mounting handle (14) is fixed with the outer side of the side plate (111); the middle part of the mounting handle (14) is provided with a through hole (141).

4. The substation secondary small bus anti-misoperation protective shell according to claim 1, characterized in that: an installation plate (15) is fixed at the upper end of the rectangular cover (11); the mounting plate (15) comprises a horizontal pressing plate (152) and two upright posts (151) which are vertically and symmetrically fixed at the lower end of the pressing plate (152); the lower end of the upright post (151) is fixed on the rectangular cover (11).

5. The substation secondary small bus anti-misoperation protective shell according to claim 1, characterized in that: the protective shell body (1) is made of photosensitive insulating resin materials.