CN111952844A - A kind of anti-mistake protective shell for secondary small busbar of substation - Google Patents

Abstract

The invention relates to an anti-mistake protection case for a secondary small busbar of a substation, comprising a protective case body mounted on a small busbar clamp; the small busbar clamp comprises two vertical and parallel isolation plates; The top wiring terminal and the side wiring terminal are fixed up and down in sequence, and the small busbar is detachably fixed between the top wiring terminal and the side wiring terminal; the protective shell body is in an arch structure with an open lower end; the protective shell body The end faces on both sides are respectively attached to the inner end faces of the two isolation plates; the protective shell body is covered above the top terminal; both ends of the protective shell body are downwardly provided with a penetrating avoidance groove; The small bus bar can pass through the escape slot. The protective shell is simple and reliable in structure and simple in operation, and is used in the normal operation or disassembly process of the small busbar, effectively preventing the misoperation of the small busbar on the screen top due to human reasons, ensuring the safety of the power grid, equipment and personal, and improving the operation safety.

Description

A kind of anti-mistake protective shell for secondary small busbar of substation

technical field

The invention relates to an anti-mistake protection shell of a secondary small busbar of a substation, and belongs to the technical field of substation equipment.

Background technique

As we all know, most of the protective screens in substations are connected by small busbars on the top of the screen, and the small busbars on the top of the screen are usually made of copper rods with a diameter of 6 mm or 8 mm. In the protective panel cabinet in the substation, the small bus bar on the top of the screen, as the channel for the collection, distribution and transmission of AC secondary voltage signals, exists in a large number in the relay protection room of the substation, and is of great significance to the secondary devices such as substation protection, measurement and measurement. Therefore, the stable operation of the small busbar will affect the AC/DC system, which is the top priority of the safe operation of the substation.

Most of the small busbars on the top of the screen are laid in a whole connection. In the reconstruction and construction of secondary devices such as substation protection, measurement and metering, it involves frequent operations of live dismantling and connection of small busbars. It will lead to short circuit and grounding of the small busbar on the top of the screen, affecting the normal operation of the secondary equipment, and even seriously affecting the safe and stable operation of the power grid. In order to ensure the reliability of power supply, the removal of the small busbar on the top of the screen generally requires live work. At the same time, since the small busbars are laid on the top of the protective screen, more than 2 meters away from the ground, the operation is a high-altitude operation and the working space is narrow (the distance between the axes of the small busbars on the same layer is only 30mm, and the distance between the upper and lower layers of the small busbars is only 60mm). Located at the lower end of the running small busbar, it is difficult to use a screwdriver to remove screws and crimp hard wires, which is time-consuming, laborious, and has many dangerous points.

At present, in the relay protection room of the substation, the more common protection tools for the small busbar on the screen top mainly include heat shrinkable tubes, dust covers, and anti-mistake covers. Among them, the protection range of the heat shrinkable tube and the anti-mistake cover has a protective blind area, which cannot protect the terminal on the side of the busbar clip and the small busbar without heat shrinkage. The protective effect of the dust cover is good during normal operation. When the dust cover is removed, the entire top of the screen loses its protective ability. The current technical solutions cannot fully protect the small busbar on the top of the screen.

SUMMARY OF THE INVENTION

In order to overcome the above problems, the present invention provides an anti-mistake protection case for the secondary small busbar of a substation. The protective case is simple and reliable in structure and simple in operation. The busbar is mistakenly short-circuited, accidentally touched, and mistakenly grounded due to man-made reasons, ensuring the safety of the power grid, equipment, and personal, and improving the safety of the operation.

The technical scheme of the present invention is as follows:

An anti-mistake protection shell for secondary small busbars of a substation, comprising a protective shell body mounted on a small busbar clip; the small busbar clip includes two vertical and parallel isolation plates; the two isolation plates are fixed in sequence up and down There are top wiring terminals and side wiring terminals, and the small busbar is detachably fixed between the top wiring terminals and the side wiring terminals; the protective shell body is an arch structure with an open lower end; the end faces on both sides of the protective shell body They are respectively attached to the inner end faces of the two isolation plates; the protective shell body is covered above the top terminal; both ends of the protective shell body are downwardly provided with a penetrating avoidance groove; Pass through the escape slot.

Further, the protective shell body includes a rectangular cover and two U-shaped covers respectively fixed at two ends of the two rectangular covers; the U-shaped cover opens downward; the lower end and both sides of the rectangular cover are open and arranged; the The end surfaces on both sides of the rectangular cover are respectively attached to the inner end surfaces of the two isolation plates; the rectangular cover is covered above the top connection terminal; the side plates at both ends of the rectangular cover are fixed with the U-shaped cover; the side plates A transversely penetrating opening groove is set on the upper part; the opening of the U-shaped cover communicates with the opening groove; the small bus bar can be accommodated in the opening of the U-shaped cover.

Further, a funnel-shaped constriction is also fixed between the side plate and the U-shaped cover; the lower end of the constriction is open; the diameter of the constriction is directed from the side plate to the U The hood is gradually reduced; the openings of the constricted portion are respectively communicated with the openings of the U-shaped hood and the opening grooves.

Further, a vertical installation handle is fixed above the constricted portion; the inner end surface of the installation handle is fixed to the outer side of the side plate; a through hole is formed in the middle of the installation handle.

Further, a mounting plate is fixed on the upper end of the rectangular cover; the mounting plate includes a horizontal pressure plate and two vertical columns fixed on the lower end of the pressure plate symmetrically; the lower end of the column is fixed on the rectangular cover.

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

The present invention has the following beneficial effects:

1. The protective shell is simple and reliable in structure and simple in operation. It is used in the normal operation of the small busbar or the process of dismantling and connecting the small busbar. Personal safety, improve work safety.

2. The protective shell expands the anti-mistake ability to the protection blind area of the traditional method, and realizes all-round protection of the small busbar on the top of the screen and its busbar clamp terminals. The safe operation of the busbar ensures personal and power grid safety.

3. The protective shell has developed a universal anti-mistake device suitable for a variety of screen cabinets through computer-aided design technology and 3D printing technology. The device adopts a wrapping design on both sides, and a unique open funnel-shaped structure and open U-shaped design are designed. The structure, together with the heat shrinkable tube, can achieve 100% protection to the small bus bar on the top of the screen.

4. By designing the installation handle (or installation plate), it is more convenient to disassemble and assemble the anti-error device, and it can be easily adjusted even in a narrow space, which improves the operability and safety of the protective shell.

5. The protective shell is made of photosensitive insulating resin, which has the advantages of high mechanical strength and not easy to break, which is convenient for use on the construction site. At the same time, the characteristics of strong thermal stability, flame retardant and insulation are very good to meet the actual operation of the small busbar. needs in the state.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the protective shell body when it is installed on the small busbar clip.

FIG. 2 is a front view of FIG. 1 .

FIG. 3 is a top view of FIG. 1 .

FIG. 4 is a schematic structural diagram of a protective case body according to Embodiment 1 of the present invention.

FIG. 5 is a front view of FIG. 4 .

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

FIG. 7 is a schematic structural diagram of a protective case body according to Embodiment 2 of the present invention.

FIG. 8 is a left side view of FIG. 7 .

The reference numbers in the figure are indicated as:

1. Protective shell body; 11. Rectangular cover; 111. Side plate; 112. Opening slot; 12. Narrow part; 13. U-shaped cover; 14. Mounting handle; 141. Through hole; 15. Mounting plate; 151, Column; 152, pressure plate; 2, small busbar clip; 21, isolation plate; 22, top terminal; 23, side terminal; 24, small bus.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1:

1-6, an anti-mistake protection case for secondary small busbars of a substation includes a protective case body 1 mounted on a small busbar clamp 2; the small busbar clamp 2 includes two vertical and parallel isolation plates 21; A top terminal 22 and a side terminal 23 are sequentially fixed between the two isolation plates 21 up and down, and a small bus bar 24 is detachably fixed between the top terminal 22 and the side terminal 23; the protective shell body 1 has an arched structure with an open lower end; the end faces on both sides of the protective shell body 1 are respectively attached to the inner end faces of the two isolation plates 21 ; the protective shell body 1 is covered above the top terminal 22 ; Both ends of the housing body 1 are provided with downwardly extending escape grooves; the small bus bar 24 can pass through the escape grooves.

By analyzing the installation situation of the secondary small busbar 24 on the top of the commonly used protective panel cabinet and the structure of the installation terminal of the small busbar 24 in the power system, it is found that the small busbar anti-mistake protection shell only needs to match the small busbar clip 2, the general structure of the installation terminal, By covering the part of the secondary small busbar 24 where the terminal is installed, and with the heat shrinkable tube, all the metal exposed parts of the small busbar 24 and the terminal of the busbar clamp can be basically eliminated, and the small busbar 24 in operation can be reliably protected.

According to the above description, the small busbar clip 2 is the structure used for installing the small busbar 24 in the protection panel cabinet commonly used in the power system. The arched protective shell body 1 is installed on the small busbar clip 2, the end faces on both sides of the protective shell body 1 are respectively attached to the inner end faces of the two isolation plates 21, the protective shell body 1 is covered above the top terminal 22, and the protective shell body 1 The ends of both ends are further provided with escape grooves for the small bus bars 24 to pass through. In this way, the protective shell body 1 can be matched with the small busbar clip 2 to cover the top wiring terminal 22 and the side wiring terminal 23, and can reliably protect the small busbar 24 in operation.

Further, the protective shell body 1 includes a rectangular cover 11 and two U-shaped covers 13 respectively fixed on both ends of the two rectangular covers 11; the U-shaped cover 13 opens downward; the lower end and both sides of the rectangular cover 11 The end faces on both sides of the rectangular cover 11 are respectively attached to the inner end faces of the two isolation plates 21 ; the rectangular cover 11 is covered above the top terminal 22 ; It is fixed with the U-shaped cover 13; the side plate 111 is provided with an opening slot 112 which penetrates horizontally; the opening of the U-shaped cover 13 communicates with the opening slot 112; the small bus bar 24 can be accommodated in the U-shaped cover 112. inside the opening of the hood 13.

According to the above description, according to the shape of the small busbar clip 2 commonly used in secondary equipment panel cabinets, a rectangular cover 11 with a rectangular opening is designed in the middle of the protective shell body 1 to cover the main body of the small busbar clip 2 and the top terminal 22; For the protective blind areas such as the side terminals 23 on both sides of the small busbar clip 2 and the unheated part of the small busbar 24, the wrapping design on both sides is adopted, and the side terminals 23 and the small busbars are designed on both sides of the rectangular cover 11 The U-shaped cover 13 of 24, the U-shaped cover 13 is used to wrap the unshrinked part of the small bus bar 24 to prevent the tool or the human body from accidentally touching the small bus bar 24 during operation.

Further, a funnel-shaped constriction portion 12 is also fixed between the side plate 111 and the U-shaped cover 13 ; the constriction portion 12 has an open lower end; the diameter of the constriction portion 12 is determined by the side The plate 111 is gradually reduced toward the U-shaped cover 13 ; the openings of the constricted portion 12 are respectively communicated with the openings of the U-shaped cover 13 and the opening grooves 112 .

According to the above description, the two ends of the open funnel-shaped constriction portion 12 are respectively connected to the rectangular cover 11 and the U-shaped cover 13, and at the same time, the open funnel-shaped constriction portion 12 can protect the side terminals 23 on both sides of the small busbar clip 2, To prevent the tool or human body from accidentally touching the side terminal 23 during operation; at the same time, due to the funnel-shaped structure, the operation on the adjacent small busbar 24 will not be hindered.

Further, a vertical installation handle 14 is fixed above the constricted portion 12 ; the inner end surface of the installation handle 14 is fixed to the outer side of the side plate 111 ; a through hole 141 is formed in the middle of the installation handle 14 .

According to the above description, during the construction of the substation screen roof, it is often necessary to install and remove the secondary small busbar 24 on the screen top of the protective screen cabinet. At the same time, when the small bus bar 24 is removed and installed, the traditional protective device will also cause accidental touch. Therefore, in order to ensure that other adjacent small bus bars 24 are not accidentally touched or shortened during the disassembly and assembly process, in view of the above situation, the installation handles 14 are specially designed on the constricted portions 12 on both sides. By grasping the through holes 141, The protective shell can be disassembled and assembled more conveniently, and the protective shell can be easily adjusted even in a narrow space, which improves the operability and safety of the protective shell.

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

According to the above description, in terms of material selection, the protective shell is specially selected from photosensitive resin materials commonly used in 3D printing. Its strength, thermal stability, flame retardancy and insulation can well meet the needs of small busbars in actual operating conditions. .

Embodiment 2:

Referring to FIGS. 7-8 , there is an anti-mistake protection case for the secondary small busbar of a substation. The difference between this embodiment and the first embodiment is that the installation plate 15 is used instead of the installation handle 14 .

A mounting plate 15 is fixed on the upper end of the rectangular cover 11; the mounting plate 15 includes a horizontal pressing plate 152 and two vertical columns 151 symmetrically fixed on the lower end of the pressing plate 152; the lower end of the vertical column 151 is fixed on the rectangular cover 11 on.

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

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (6)

1. An anti-mistake protective case for secondary small busbars of a substation, characterized in that: it comprises a protective case body (1) installed on a small busbar clamp (2); the small busbar clamp (2) comprises two vertical and parallel The provided isolation plate (21); a top terminal (22) and a side terminal (23) are fixed in sequence between the two isolation plates (21) up and down, and a small busbar (24) is detachably fixed on the top terminal between (22) and the side terminal (23); the protective shell body (1) has an arched structure with an open lower end; the end faces on both sides of the protective shell body (1) are respectively attached to the two isolation plates The inner end face of (21); the protective shell body (1) is covered above the top connection terminal (22); the two ends of the protective shell body (1) are provided with downward through escape grooves; The small bus bar (24) can pass through the escape groove. 2. The anti-mistake protective case for the secondary small busbar of the substation according to claim 1, characterized in that: the protective case body (1) comprises a rectangular cover (11) and two two rectangular covers (11) respectively fixed on the two. The U-shaped cover (13) at the end; the opening of the U-shaped cover (13) is downward; the lower end and both sides of the rectangular cover (11) are open; the inner end face of the isolation plate (21); the rectangular cover (11) is covered above the top terminal (22); the side plates (111) at both ends of the rectangular cover (11) and the U-shaped cover ( 13) Fixing; the side plate (111) is provided with an open groove (112) that penetrates horizontally; the opening of the U-shaped cover (13) is communicated with the open groove (112); the small bus bar (24) can It is accommodated in the opening of the U-shaped cover (13). 3. The anti-mistake protection shell of the secondary small busbar of the substation according to claim 2, wherein a funnel-shaped constriction (111) is also fixed between the side plate (111) and the U-shaped cover (13). 12); the lower end of the constriction portion (12) is openly arranged; the diameter of the constriction portion (12) is gradually reduced from the side plate (111) toward the U-shaped cover (13); the constriction portion (12) is gradually reduced The openings of (12) are respectively communicated with the openings of the U-shaped cover (13) and the opening grooves (112). 4. The anti-mistake protection shell of the secondary small busbar of the substation according to claim 3, characterized in that: a vertical installation handle (14) is fixed above the constricted portion (12); the inner side of the installation handle (14) The end face is fixed to the outside of the side plate (111); a through hole (141) is formed in the middle of the installation handle (14). 5. The anti-mistake protection shell of the secondary small busbar of the substation according to claim 2, characterized in that: a mounting plate (15) is fixed on the upper end of the rectangular cover (11); the mounting plate (15) comprises a horizontal pressing plate (152) and two vertical columns (151) symmetrically fixed on the lower end of the pressing plate (152); the lower end of the column (151) is fixed on the rectangular cover (11). 6 . The anti-mistake protective case for the secondary small busbar of the substation according to claim 1 , wherein the protective case body ( 1 ) is made of a photosensitive insulating resin material. 7 .

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