CN1258253C - Enclosed switchboard outer box and enclosed switchboard with the outer box - Google Patents

Abstract

An outer box of a closed switchboard, on both sides of a left panel (4) with curved parts (4a, 4b) on both side edges, and left side panels with curved parts (3a, 3b) on both side edges (3) With the left side panel (5) having curved parts (5a, 5b) on both side edges, these curved parts (3b, 4a) and curved parts (4b, 5a) are butted together, and bolts, nuts, rivets, etc. The fastening member fastens the butt joint to form the side plate, so that the side plate is fixed on both sides of the bottom plate (2) with the bent portion (3a-5b) up and down. This structure can be formed without welding. Cabinets with required shape accuracy, reducing manufacturing costs.

Description

Enclosed switchboard outer box and enclosed switchboard with the outer box

technical field

The invention relates to an outer box of a closed switchboard.

Background technique

The structure of the existing closed switchboard is: the inside of the outer box composed of a box made of grounded metal is isolated by a partition plate made of grounded metal or insulating material, and a plurality of compartments are formed. In the respective compartments, Contains bus-side branch conductors connected to the common bus, another electrical room, load-side conductors connected to power transmission cables for power transmission to loads such as load equipment, switching devices for connecting and separating the two conductors, and pairing Internal devices such as control devices necessary for monitoring and control.

The outer box of the enclosed switchboard as described above must have a structure that can withstand the increase in internal pressure due to the occurrence of internal accidents. In the conventional technology, the necessary parts including the four corners around the bottom plate are fixed by welding. Pillars are erected at the base, side plates are erected between these pillars to form a box, partition plates are erected between these side plates to form respective intervals, and the bending strength of the side plates is ensured.

However, in the outer box of the existing closed switchboard with the above structure, since the shape accuracy of the box body is controlled by the pillars erected around the bottom plate, when installing these pillars, in order to ensure that the bottom plate The welding work using a large-scale welder jig is necessary for the verticality on the surface, and highly skilled technicians are required for the welding work, which has a problem of increasing the manufacturing cost of the enclosed switchboard.

Contents of the invention

In view of the above-mentioned disadvantages, an object of the present invention is to provide an outer box of a closed switchboard which can be formed with a required shape accuracy without welding, and which realizes a significant reduction in manufacturing cost.

In the enclosed switchboard and its outer box of the present invention, the support portions of a pair of side plates integrally formed with support portions are fixed up and down on both sides of the bottom plate by bending both side edges in the thickness direction, and on the opposite surfaces of the side plates Install partitions between.

In the present invention, the pillar portion is integrally formed in advance by bending both side edges, and the side plate with improved bending strength is used, and the side plate is connected to the peripheral edge of the bottom plate by fastening members such as rivets and bolts to secure As the shape accuracy of the box body, partition plates are formed between the facing surfaces of the two side plates to form respective intervals, and the bending strength of the side plates is ensured.

In the enclosed switchboard and its outer case of the present invention, the bent portions of a plurality of plate materials whose side edges are bent in the thickness direction are butted together, and the butted portions are fastened to form side plates.

In the present invention, a plurality of boards whose side edges are bent by fastening the bent parts are integrated to form side boards fastened and fixed on both sides of the bottom plate, and the bent parts between the boards are also used as pillars to improve the shape. Accuracy and strength. In addition, the side panels can also be composed of panels with limited dimensions, thereby preventing pressure release from the joints of the panels when internal pressure rises due to internal accidents.

In the closed switchboard and its outer box of the present invention, the edge portions of the side plate and the bottom plate are bent, and the bent portions are butted and fastened.

In this invention, a bent portion is provided at each edge between the side plate and the bottom plate, and by abutting and fastening the bent portion, it is possible to prevent damage to the side plate and the bottom plate when the internal pressure rises due to an internal accident. Decompression of base plate joints.

Description of drawings

Fig. 1 is an exploded perspective view of the outer box of the enclosed switchboard of the present invention.

Fig. 2 is an enlarged cross-sectional view showing various embodiments of plate joints constituting side plates.

Fig. 3 is an enlarged sectional view showing the combination of the side plate and the bottom plate.

Fig. 4 is a plan cross-sectional view showing an example of a form for erecting a partition inside the outer box.

Fig. 5 is an enlarged cross-sectional view of a main part showing a preferred structure of a junction between a side plate and a partition plate.

Detailed ways

Hereinafter, the present invention will be described in detail based on the drawings showing the embodiments. Fig. 1 is an exploded perspective view of the outer box of the enclosed switchboard of the present invention.

The structure of the outer case 1 of the present invention as shown in the figure is, on the both side edges along the longitudinal direction of the base plate 2 that becomes the base, the left side panels 3, 4, 5 and the right sides are installed respectively. The lower part of the panels 6, 7, 8 are erected on the bottom plate 2 and respectively erected crossbeams 9a, 9b, 9c between the upper edges of the opposite side panels 3, 4, 5 and 6, 7, 8.

The left side panel 3 is a rectangular plate, and the two side edges parallel to each other in the longitudinal direction are continuously bent to a predetermined width in the thickness direction to form bent parts 3a, 3b, and the other two side edges are also formed with a direction. The thickness direction is continuously bent into the bent portions 3c, 3d having a predetermined width.

In the other left side panels 4 and 5, the same bent portions 4a to 4d and 5a to 5d as the bent portions 3a to 3d in the left side panel 3 are respectively formed on their peripheral edge portions. Such left side panels 3, 4, 5 are arranged side by side in the same plane with the wide left side panel 4 as the center, and the curved portion 4a formed on the side edge of the left side panel 4 and the curved portion 4a formed on the left side panel The curved portion 3b of the other side edge of 3 is butted, and the curved portion 4b formed on the other side edge is abutted with the curved portion 5a formed on the other side edge of the left side panel 5, and then penetrates them in the thickness direction to form a Fastening members such as rivets and bolts are inserted into each of the plurality of joint holes 10 and 10 formed, and are fastened and joined to each other to form the left side panel.

FIG. 2 is an enlarged cross-sectional view showing the vicinity of the joint of the left side panels 3 and 4 showing various embodiments of the joint. In Fig. 2 (a), the curved portion 3b of the left side panel 3 and the curved portion 4a of the left side panel 4 are bent together at a substantially right angle to the thickness direction to have an L-shaped cross-section, so that the bending of the side panels 3, 4 The outer surfaces of the curved parts 3b and 4a are butted against each other, and the bolts 30 inserted through the coupling holes 10 (see FIG. 1 ) of the butted parts and the nuts 40 screwed therewith are fastened to the respective inner surfaces of the curved parts 3b and 4a to be combined. .

In FIG. 2( b ), the bent portion 3b of the left side panel 3 and the bent portion 4a of the left side panel 4 have a U-shaped cross-section that is bent together at a substantially right angle in the thickness direction and then bent again at a substantially right angle in the same direction. The longitudinal sides of the curved parts 3b and 4a of the side panels 3 and 4 are butted against each other, and the bolts 30 inserted through the joint holes 10 of the butted parts and the nuts 40 screwed therewith are fastened and combined. the inner face of the longitudinal edge. In addition, the lateral sides of the bent portions 3b and 4a extending in opposite directions are used as partitions or joints of internal equipment described later.

In Fig. 2(c), the bent portion 3b of the left side panel 3 and the bent portion 4a of the left side panel 4 are the same as in FIG. The bending width of one bending portion 3b is made larger than the bending width of the other bending portion 4a. After the inner surface of the curved portion 3b is folded back, the remaining portion on the tip side of the wide curved portion 3b is folded back to sandwich the tip side of the other curved portion 4b.

In Fig. 2 (d), the curved portion 3b of the left side panel 3 and the curved portion 4a of the left side panel 4 have L-shaped and U-shaped cross-sections respectively, and their two longitudinal sides are butted against each other. Use the bolt 30 and the nut 40 to fasten and combine.

In FIG. 2( e ), the bent portion 4a of the left side panel 4 has an L-shaped cross section, and the bent portion 3b of the left side panel 3 has a crank that is bent in the thickness direction at a substantially right angle and then reversely bent at a substantially right angle. Shaped cross-section, make the longitudinal sides of the curved portion 3b of the side panels 3 and 4 abut against the curved portion 4a, and fasten and combine with bolts 30 and nuts 40 at the abutting portion.

In Fig. 2 (f), the curved portion 3b of the left side panel 3 and the curved portion 4a of the left side panel 4 have crank-shaped and U-shaped cross-sections respectively, so that their two longitudinal sides are butted, and at the butt-joint portion Bolts 30 and nuts 40 are fastened together, and the lateral sides of the bent parts 3b and 4a overlap in the thickness direction and extend toward the bent part 4b side. 2(d) and (e) are the same as those in FIG. 2(b), and are used as support portions for separators described later. In addition, in each of the above figures, other fastening members such as rivets may be used instead of the bolts 30 and the nuts 40 . The same connection can also be realized between the bent portion 4 b of the other side edge of the left side panel 4 and the one bent portion 5 a of the left side panel 5 .

In the left side panel obtained by combining the left side panels 3, 4, 5 in this way, the bending parts 3b, 4a and 4b, 5a which are combined with each other and the bending parts 3a, 5b which are not combined with it have the function of, The longitudinal direction increases the bending strength and acts as a pillar to support itself. That is, the bent portions 3a, 3b, 4a, 4b, 5a, 5b formed by bending the side edges parallel to each other in the thickness direction of the left side panels 3, 4, 5 constituting the left side panel are integrally formed as a pillar portion, In this state, by joining with one side of the bottom plate 2, a firm side plate can be formed.

In addition, the curved portions 3a, 5b that are not connected thereto are the same as the curved portions 3b, 4a shown in FIG. In addition, in this embodiment, the left side plate is formed by combining three plates (left side panels 3, 4, 5), but it is also possible to combine two or more plates in the same manner to form the left side plate. Even the left side panel can be formed by bending both side edges of a single panel.

The connection between the left side panels 3, 4, 5 and the base plate 2, for example, the left side panel 3 is performed by one bent portion 3c formed along the short side. Fig. 3 is an enlarged sectional view showing its combined form.

The curved portion 3c of the left side panel 3 as shown in the figure has an appropriate length from the end edge, which is bent at a substantially right angle in the thickness direction on the same side as the curved portion 3a, 3b, and then bent in the same direction again. The bottom plate 2 has a substantially right-angled U-shaped cross-section, and an L-shaped curved portion 2a standing substantially at right angles is formed on the joint edge portion of the bottom plate 2 . The U-shaped lateral side of the latter curved portion 3c is butted against the former curved portion 2a, and the bolt 30 inserted into the joint hole 11 (see FIG. 1 ) formed in the corresponding portion of the mated portion and the nut 40 screwed thereto are Fasten on the inner surface of the docking part, so that the bottom plate 2 and the left side panel 3 are combined. The same combination is also done to the other left side panels 4,5. In this connection, it goes without saying that the bolts 30 and nuts 40 may be replaced with other fastening members such as rivets, as in the connection between the left side panels 3 , 4 , and 5 .

The left side panel composed of the left side panels 3, 4, and 5 combined with the base plate 2 in this way is set upright with the base plate 2 as a base, and the verticality between the two is increased by the bending for the combination of the two. The shape accuracy of the parts 2a and 3c is ensured. In this way, the left side panel composed of the left side panels 3, 4, 5 not only has high bending rigidity through the mutual combination, but also becomes a base plate based on the bottom panel 2 through the above-mentioned combination with the bottom panel 2. A state in which the seat is erected with a high degree of verticality. The same combination can also be realized for the right side panels 6, 7, 8 shown by the two-dashed line in Fig. 1 .

In the outer box 1 of the closed switchboard of the present invention, for the inside of the box body obtained by fastening the left side plate and the right side plate on both sides of the bottom plate 2 as described above, a partition for partitioning and arranging equipment is erected. plate. FIG. 4 is a top cross-sectional view showing an example of a form of erection of partitions inside the outer box 1. As shown in FIG.

In this figure, between the left side panel composed of left side panels 3, 4, 5 and the right side panel composed of right side panels 6, 7, 8, three partitions 12 are erected in the front and rear direction. , 13, 14, thereby, the inside of outer box 1 is formed with 4 intervals from the front (lower part in the figure) to the rear.

The front partition of the partition 12 at the front is used as a control equipment room 15 to accommodate control equipment necessary for monitoring control, and the partition between the partition 12 and the central partition 13 is used as a circuit breaker for accommodating a circuit breaker. Chamber 16, the space between the partition plate 13 and the rear partition plate 14 is used as a bus bar room 17 to install the bus side branch conductors connected with the common bus bar, and the space behind the partition plate 14 is used for As the cable chamber 18, load-side conductors for connection with power transmission cables are installed.

In addition, for the partition plate 13 that separates the breaker chamber 16 from the busbar chamber 17, the protruding end facing the busbar chamber 17 side is provided with a connecting portion with the branch conductor on the busbar side, and a connection part is provided in the breaker chamber 16 for connection. Openings to fix the breaking parts 20, 20, 20. In addition, on the partition plate 14 that becomes the front wall of the cable chamber 18, the insulators 21, 21, 21 as the load-side conductor support and the middle of the load-side conductor are supported. Inverters 22, 22 for converting the flowing current.

In the partitions 12, 13, 14, the partition 12 at the front is erected by the junction of the left side panel 3 and the left side panel 4, and the partition 14 at the rear is erected by the junction of the left side panel 4 and the left side panel 5. Combined parts to erect. In the joint portion, the joint form shown in FIG. 2( d) is applied, and for erection of the partition plate 12 and the partition plate 14, the lateral side of the curved portion having a U-shaped cross section is utilized on one side.

In addition, the central partition 13 is erected between the erecting ribs 23, 23 directly combined with the board surfaces of the central left side panel 4 and the right side panel 7, and bolts can be used to connect the erection ribs 23, 23 to the board surfaces. and fastening components such as nuts or rivets.

Fig. 5 is an enlarged cross-sectional view of a main part showing a preferred structure of the joint. As shown in this figure, on the left side panel 4, a recess 41 formed by embossing from the outside is provided at a position on the inner surface corresponding to the erection rib 23, and the erection rib 23 is in contact with the inner surface of the recess 41. , and fasten and fix the bolt 30 and the nut 40 screwed in the coupling hole 42 formed in the center of the recess 41 from the outside to the bottom surface of the recess 41 and the inner surface of the bridging rib 23, respectively.

The depth A of the recessed portion 41 is set to exceed the thickness B of the head of the bolt 30 for fixing. Therefore, the head of the bolt 30 after the fastening is embedded in the recess 41, as shown in the figure, does not protrude from the outside of the left side panel 4. When multiple panels are arranged side by side and installed as a column panel, side panels can be placed in close contact with each other.

In addition, in the use as a column switchboard, it is impossible to retighten the bolts 30 fastened on the outside of the left side panel 4. For the fixing of the erecting ribs 23 on the left side panel 4, it is best to use a The rivets in danger of loosening are used to replace the bolts 30 and nuts 40 . In addition, when the bolt 30 and the nut 40 are used to fix the erecting rib 23, when tightening them, it is necessary to work from both sides of the left side panel 4. And obtain the rivet of fixed state.

In the outer box 1 of the above structure, in use as a closed switchboard, when the internal pressure rises due to an internal accident, the internal pressure acts on the left side panels 3, 4, 5 obtained as shown in Fig. 2 Or the joint between the right side panels 6, 7, 8 and the joint between the bottom plate 2 and the side plates obtained as shown in Fig. 3, and act in a direction substantially parallel to these joint surfaces. Therefore, the respective bonding surfaces can maintain the bonding state without deviating from each other. More specifically, on the left side panels 3, 4, 5 and right side panels 6, 7, 8 constituting the side panels of the outer box 1, since the curved parts constituting the role of the pillars are integrally formed, the internal pressure rises The resistance is strong, which can prevent the discharge of arc from between the column switchboards.

In the outer box of the enclosed switchboard of the present invention as described in detail above, the side plate is used to form the pillar part integrally in advance by bending the two side edges, and it is combined with the two sides of the bottom plate by fastening. Partition plates are erected between the opposite sides of the side panels. Due to this structure, no welding work is required, and a box with the required strength and shape accuracy can be obtained, which can greatly reduce the manufacturing cost.

In addition, in the outer box of the enclosed switchboard of the present invention, since the multiple plates of the curved side edges are integrated to form the side plate through the fastening of the bent portion, the joints between the plates also function as pillars. The shape accuracy and strength can be further improved, and in addition, the side plate of a relatively deep enclosed switchboard can be formed from a plate material with a limited size. Specifically, even when the internal pressure rises due to an internal accident, it is possible to prevent pressure release from joints of the plates, and to prevent arc discharge from between row switchboards.

In addition, in the outer box of the enclosed switchboard according to the present invention, since the side plates and the bottom plate are fastened by butting the bent portions provided at the respective edges, when the internal pressure rises due to an internal accident, there is no connection between the side plates and the bottom plate. The risk of releasing pressure at the junction of the joints achieves the excellent effect of the present invention.

Claims (4)

1. the outer container of an enclosed switch board is characterized in that, has: the column sections that will improve bending strength by the bending to thickness direction is integrally formed in the pair of side plates on the both side edges that is parallel mutually; With described column sections up and down state and the bottom of described pair of side plates is fastened on base plate in the described both side edges portion respectively; The dividing plate that sets up between the opposite face of described pair of side plates, the both side edges that will make be parallel to each other is to each bend butt joint of the multi-sheets of thickness direction bending and be arranged in the one side, and each docking section is fastening and constitute side plate.

2. the outer container of enclosed switch board as claimed in claim 1 is characterized in that, side plate and base plate have the bend that makes each edge portion bending, with described bend butt joint and fastening.

3. enclosed switch board, it is characterized in that, be integrally formed in pair of side plates on the both side edges that is parallel mutually having the column sections that to improve bending strength by bending to thickness direction, with described column sections up and down state and the bottom of described pair of side plates is fastened on the base plate in the described both side edges portion respectively and the outer container of the dividing plate that between the opposite face of described pair of side plates, sets up in, accommodate the conductor of connection bus and the conductor of connected load are connected, the circuit breaker that separates, the both side edges that will make be parallel to each other is to each bend butt joint of the multi-sheets of thickness direction bending and be arranged in the one side, and each docking section is fastening and constitute side plate.

4. enclosed switch board as claimed in claim 3 is characterized in that, side plate and base plate have the bend that makes each edge portion bending, with described bend butt joint and fastening.

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