CN202282253U - Power capacitor box shell with high strength box cover - Google Patents

Abstract

The present utility model discloses a power capacitor box shell with a high strength box cover. The shell is composed of the box cover, a box bottom and a box wall, two flange holes for arranging sleeves are arranged on the box cover, at least one boss protruded outside the box shell is arranged between the two flange holes of the box cover, and the boss, the flange holes and the box cover are an integral structure. The boss is provided with a cross section shape which is formed by two straight edges parallel with long edges of the box cover, and two arcs connected with the two straight edges, a circle, in which the arcs are lied, and the flange holes adjacent with the arcs are concentric circles, and the boss is a symmetrical structure, with a connecting line of circle centers of the two flanges as a center line. Through adopting the box shell, intensity of a capacitor cover is effectively enhanced, deformation caused by stressing, heating and other factors during the using process is reduced, distances between the two sleeves of the box cover can be guaranteed, quality of the whole power capacitor can be further guaranteed, and the box cover is an integral structure and is more beautiful and elegant.

Description

The power capacitor case shell of high strength case lid

Technical field

The utility model relates to the power capacitor field, is specifically related to a kind of power capacitor case shell of high strength lid.

Background technology

Power capacitor is a kind of electrical equipment that is widely used in electric power system, and for power capacitor, the case shell is not only an external packing, the more important thing is the electric elements that protection is inner.Case lid plays the effect of the inner center of protection as the part of case shell.In addition, case lid also need support the extraction tube on it, and the maintainance set tube pitch, so the intensity of cover structure, shape not only embodied the product appearance quality, is also having a strong impact on the quality of whole capacitor.The base material of tank of power capacitor case lid is a steel plate, and the heat that capacitor produces when welding stress or operation all is prone to make it elastic deformation occur, if undercapacity will produce distortion; Gently then influence presentation quality; The heavy spacing that then possibly change two sleeve pipes influences insulation distance, thereby influences the stability of whole electric power system; What is more, can cause scrapping of power capacitor.And the case lid of existing power tank of power capacitor is planar structure; It cannot say for sure to demonstrate,prove the spacing between two sleeve pipes in the process of producing; Even the case lid of producing can guarantee this spacing; But in follow-up running,, influence the stability of whole electric power system then owing to reason such as be heated or stressed also is difficult to guarantee that the spacing between two sleeve pipes is constant.Capacitor overall dimension is big more, and this influence is obvious more, thereby the development of large value capacitor is formed restriction.

The utility model content

The technical problem that the utility model will solve provides simple in structure, good looking appearance, and can well keep on the case lid the high-intensity power capacitor case shell of spacing between two sleeve pipes.

The high-intensity power capacitor case shell that the utility model provides; By at the bottom of case lid, the case and tank wall form; Offer two flange holes that are used for mounting sleeve on the said case lid; Be provided with at least one boss towards the outside protrusion of case shell on the case lid between two flange holes, this boss, flange hole and case lid are structure as a whole; Described boss has by two straight flanges parallel with the long limit of case lid and connects two sections shape of cross sections that circular arc is formed of described two straight flanges; The circle and the flange hole adjacent with this circular arc at described circular arc place are concentric circles, and described boss is that center line is symmetrical structure with the line in two flange hole centers of circle.

Said boss is higher than case lid surface 1～5mm; For the inclined-plane is connected, the width on inclined-plane is 3～6mm between its each limit and the case lid; The straight flange of boss and each junction between the circular arc are all with the cambered surface transition, and the radius of curvature of this cambered surface is generally 2～4mm.

The width of said boss is 80～100mm, and the distance between the intersection point of two sections circular arcs and two flange hole circle center line connectings is 100～120mm.

For the case lid width greater than for the power capacitor case shell of 170mm, in order further to guarantee the intensity of case lid, can be respectively the straight flange of boss and and the long limit of case lid of its homonymy between reinforcement is set, it is parallel that said reinforcement and case lid are grown the limit.The length of said reinforcement is 250～300mm, highly is 1～5mm; The distance on the long limit of reinforcement and case lid is 15～25mm.

Greater than for the power capacitor case shell of 500mm, the boss of two above said structures can be set between two flange holes for case lid length, the spacing at the center of said adjacent two boss is 180～220mm.

The utility model case housing box covers, and the endoporus periphery of said flange hole is planar structure, is domes between the endoporus outside and the case lid surface and is connected.The peak place that the said flange endoporus outside is connected with case lid surface arch is apart from endoporus peripheral plane 0.3～1mm.

Compared with prior art, the characteristics of the utility model are:

1, the planar structure with original case lid is designed to by two straight flanges and two sections boss structures that circular arc is formed; Effectively promoted the intensity of capacitor cover; Reduced in the use distortion that produces because of factor such as stressed, be heated; Guarantee the spacing between two sleeve pipes on the case lid, guaranteed the quality of whole power capacitor then;

2, the periphery with the flange endoporus is designed to planar structure; And the endoporus outside and the case lid surface design structure that overarches is connected; The convenient automatic welding device that uses is produced, and has greatly suppressed welding deformation, has guaranteed the spacing between two sleeve pipes on the case lid from another angle; Also reduced simultaneously the influence of welding to outward appearance;

3, simple in structure, easy to process, increased the stereovision of case lid, and its stretching lines are streamlined, whole case lid is into a single integrated structure, makes case lid and whole case shell more elegant in appearance.

Description of drawings

Fig. 1 is the vertical view of the high-intensity power capacitor case of the utility model shell;

Fig. 2 is the A-A cutaway view of case lid among Fig. 1.

Label is among the figure:

1, case lid; 2 flange holes; 3 boss; The 3-1 straight flange; The 3-2 circular arc; 4 reinforcements.

Embodiment

The high-intensity power capacitor case of the utility model shell, by at the bottom of case lid 1, the case and tank wall form, offer two flange holes 2 that are used for mounting sleeve on the said case lid 1; Fig. 1 is the vertical view of the said case shell of the utility model; As shown in Figure 1, in this execution mode, be provided with a boss 3 on the case lid 1 between two flange holes 2 towards the outside protrusion of case shell; This boss 3, flange hole 2 are structure as a whole with case lid 1, specifically can adopt the cold stretch distortion to form; Described boss 3 has by two straight flange 3-1s parallel with the long limit of case lid 1 and connects two sections shape of cross sections that circular arc 3-2 forms of described two straight flange 3-1; The circle at described circular arc 3-2 place and the flange hole 2 adjacent with this circular arc 3-2 are concentric circles, and described boss 3 is that center line is symmetrical structure with the line in two flange hole 2 centers of circle.On case housing box lid 1, the endoporus periphery of said flange hole 2 is planar structure, is domes between the endoporus outside and case lid 1 surface and is connected, and the peak place of this arch connection is apart from endoporus peripheral plane 0.3～1mm, and is as shown in Figure 2.

In such scheme, said boss 3 generally is higher than case lid 1 surface 1～5mm; For the inclined-plane is connected, the width on inclined-plane is 3～6mm between its each limit and the case lid 1; The straight flange 3-1 of boss 3 and each junction between the circular arc 3-2 are all with the cambered surface transition, and the radius of curvature of this cambered surface is generally 2～4mm.The width of said boss 3 is 80～100mm, and the distance between the intersection point of two sections circular arc 3-2 and two flange holes, 2 circle center line connectings is 100～120mm.

Under the bigger situation of the case shell of power capacitor, when covering 1 width greater than 170mm like the case housing box, also can be respectively the straight flange 3-1 of boss 3 and and the case lid 1 long limit of its homonymy between reinforcement 4 is set, it is parallel that said reinforcement 4 and case lid 1 are grown the limit.The length of reinforcement 4 is advisable with 250～300mm, highly is 1～5mm; Reinforcement 4 is 15～25mm with the distance on case lid 1 long limit.

Greater than for the power capacitor case shell of 500mm, the boss 3 of two above said structures can be set between two flange holes 2 for case lid 1 length, at this moment, the spacing at the center of adjacent two boss 3 is 180～220mm.

Claims (9)

1. the power capacitor case shell of high strength lid; By at the bottom of case lid (1), the case and tank wall form; Offer two flange holes (2) that are used for mounting sleeve on the said case lid (1); It is characterized in that: be provided with at least one boss (3) towards the outside protrusion of case shell between last two flange holes of case lid (1) (2), this boss (3), flange hole (2) are structure as a whole with case lid (1); Described boss (3) has by two straight flanges (3-1) parallel with the long limit of case lid (1) and connects the shape of cross section that two sections circular arcs (3-2) of described two straight flanges (3-1) are formed; The circle at described circular arc (3-2) place and the flange hole (2) adjacent with this circular arc (3-2) are concentric circles, and described boss (3) is that center line is symmetrical structure with the line in two flange holes (2) center of circle.

2. power capacitor case shell according to claim 1 is characterized in that: said boss (3) is higher than case lid (1) surface 1～5mm, is connected for the inclined-plane between its each limit and the case lid (1); The straight flange (3-1) of boss (3) and each junction between the circular arc (3-2) are all with the cambered surface transition.

3. power capacitor case shell according to claim 2 is characterized in that: the width on said inclined-plane is 3～6mm.

4. power capacitor case shell according to claim 1 is characterized in that: the width of said boss (3) is 80～100mm, and the distance between the intersection point of two sections circular arcs (3-2) and two flange holes (2) circle center line connecting is 100～120mm.

5. according to each described power capacitor case shell in the claim 1～4, it is characterized in that: the straight flange (3-1) of boss (3) and and the long limit of case lid (1) of its homonymy between be provided with reinforcement (4), it is parallel that said reinforcement (4) and case lid (1) are grown the limit.

6. power capacitor case shell according to claim 5 is characterized in that: the length of said reinforcement (4) is 250～300mm, highly is 1～5mm; Reinforcement (4) is 15～25mm with the distance on the long limit of case lid (1).

7. according to each described power capacitor case shell in the claim 1～4, it is characterized in that: the spacing at the center of said adjacent two boss (3) is 180～220mm.

8. according to each described power capacitor case shell in the claim 1～4, it is characterized in that: the endoporus periphery of said flange hole (2) is planar structure, is domes between the endoporus outside and case lid (1) surface and is connected.

9. power capacitor case shell according to claim 8 is characterized in that: the peak place that the said flange endoporus outside is connected with the surperficial arch of case lid (1) is apart from endoporus peripheral plane 0.3～1mm.