Contact box, bus device of switchgear and air-insulated medium-voltage switchgear

Abstract

The utility model belongs to the technical field of electrical, and particularly relates to a contact box, a switch equipment bus device and air insulation medium voltage switch equipment, the contact box is used for the switch equipment, the contact box comprises a shell body, one end of the shell body is open, the other end is provided with a fixing plate, and the shell body is of a sleeve type structure; the middle part of the fixing plate is provided with a through hole for a branch copper bar to be inserted into the housing body, and the fixing plate is provided with a positioning hole. The fixing blocks are arranged on the outer sides of the branch copper bars in a sleeving mode, fixing columns corresponding to the positioning holes are arranged on the sides, facing the shell body, of the fixing blocks, and the fixing columns can be inserted into the positioning holes; and the fixing piece is inserted into the fixing column and the positioning hole so as to fix the fixing block on the shell body. According to the scheme, the branch copper bars have good centering degree and do not deflect due to external force, the distance between the branch copper bars between phases is guaranteed, and the problem of voltage withstanding breakdown is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electrical technology, and particularly relates to a contact box, a switch device bus device and an air insulation medium voltage switch device. BACKGROUND

[0002] The switch cabinet is a very important device in the power system, and a large number of components, insulating parts and conductive parts such as circuit breakers, contact boxes and copper bars are arranged in the switch cabinet.

[0003] The contact box structure currently available on the market fixes the static contact and the branch copper bar on the contact box, but the structure still has problems. When the branch copper bar and the static contact are installed in the contact box, the branch copper bar cannot be well centered, which can easily cause the distance between the branch copper bars of different phases to be small, and the withstand voltage breakdown can easily occur. In addition, the internal bus of the branch copper bar can be twisted due to the electric force, which can increase the hidden danger of accidents. CONTENT OF THE UTILITY MODEL

[0004] The application aims to solve the problem that the branch copper bar cannot be well centered when the branch copper bar and the static contact are installed in the contact box, which can easily cause the distance between the branch copper bars of different phases to be small, and the withstand voltage breakdown can easily occur. In addition, the internal bus of the branch copper bar can be twisted due to the electric force, which can increase the hidden danger of accidents.

[0005] The application provides a contact box in a first aspect, which is used for a switch device, and the contact box comprises a shell body, which is in a sleeve type structure, one end of the shell body is open, the other end is provided with a fixed plate, the middle part of the fixed plate is provided with a through hole for inserting a branch copper bar into the shell body, and a positioning hole is formed in the fixed plate; a fixed block is sleeved on the outside of the branch copper bar, one side of the fixed block facing the shell body is provided with a fixed column corresponding to the positioning hole, and the fixed column can be inserted into the positioning hole; and a fixing piece is inserted into the fixed column and the positioning hole to fix the fixed block on the shell body.

[0006] In an example embodiment of the application, a plurality of positioning holes are formed in the fixed plate, and the positioning holes are arranged at intervals; a plurality of fixed columns are arranged on the fixed block, and the fixed columns correspond to the positioning holes one by one.

[0007] In an example embodiment of the application, the fixed block is provided with a through hole corresponding to the through hole, and a plurality of fixed platforms arranged at intervals are arranged on the fixed block at the through hole, and the fixed platforms are arranged around the outer wall of the branch copper bar.

[0008] In an example embodiment of the present application, a plurality of heat dissipation holes are formed on the fixing plate, and the plurality of heat dissipation holes are arranged at intervals with the positioning holes.

[0009] In an example embodiment of the present application, the plurality of heat dissipation holes and the plurality of positioning holes are arranged in an annular array on the fixing plate.

[0010] In an example embodiment of the present application, the contact box further comprises a protective cover arranged on the side of the fixing plate away from the shell body, wherein the protective cover comprises a first protective plate, a second protective plate and a cover body, the first protective plate is arranged opposite and parallel to the second protective plate, one end of the cover body is connected to the first protective plate, and the other end of the cover body is connected to the second protective plate.

[0011] In an example embodiment of the present application, the cover body is in a circular arc structure, and the cover body is arranged along the outer edge of the fixing plate.

[0012] In an example embodiment of the present application, the contact box further comprises a mounting flange arranged on the side of the shell body with the opening, wherein the mounting flange is provided with a mounting hole, and the mounting flange is mounted on the switchgear through the mounting hole.

[0013] The second aspect of the present application provides a busbar device of a switchgear, comprising: a branch copper bar comprising a branch busbar and a tube body arranged outside the branch busbar; the contact box of any one of the above, and the branch copper bar is inserted into the shell body through the through hole on the shell body and is fixed on the shell body through the fixing block and the fixing member.

[0014] The third aspect of the present application provides an air-insulated medium-voltage switchgear, comprising the busbar device of the switchgear as described above.

[0015] The contact box, the busbar device of the switchgear and the air-insulated medium-voltage switchgear of the present application have at least the following beneficial effects:

[0016] The contact box of the present application comprises a shell body, a fixing block and a fixing member, the fixing plate is provided with a positioning hole, the fixing block is provided with a fixing column, the fixing column can be inserted into the positioning hole on the fixing plate, and the fixing block is fixed on the fixing plate through the fixing member, so that the fixing block is fixed on the fixing plate and cannot move relatively. The branch copper bar is fixed on the shell body by the fixing block sleeved outside, so that the branch copper bar is fixed on the contact box, the deflection of the branch copper bar under external force is avoided, the distance between the branch copper bars of different phases is prevented from becoming smaller, and the problem of pressure breakdown is avoided. In addition, the good centering of the branch copper bar in the contact box is ensured by inserting the branch copper bar into the through hole in the middle of the shell body.

[0017] Other features and advantages of the present application will be apparent from the following detailed description, or can be learned by practice of the application.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application. It is to be understood that the drawings are designed solely for purposes of illustration to be used in conjunction with the description in

[0020] Figure 1 Fig. 1 shows a structure schematic diagram of a fixed block fixed on a fixed plate according to an embodiment of the present application.

[0021] Figure 2 Fig. 2 shows a structure schematic diagram of a branch copper fixed on a contact box according to an embodiment of the present application.

[0022] Figure 3 Fig. 3 shows a structure schematic diagram of a mounting flange arranged on one side of a shell body according to an embodiment of the present application.

[0023] Figure 4 Fig. 4 shows a structure schematic diagram of a fixed plate with a protective cover arranged on one side according to an embodiment of the present application.

[0024] Figure 5 Fig. 5 shows a structure schematic diagram of a fixed plate with a through hole, a positioning hole and a heat dissipation hole arranged thereon according to an embodiment of the present application.

[0025] Figure 6 Fig. 6 shows a structure schematic diagram of a fixed block according to an embodiment of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 100, contact box;

[0028] 110, shell body; 111, fixed plate; 1110, through hole; 1111, positioning hole; 1112, heat dissipation hole;

[0029] 120, fixed block; 120a, first fixed part; 120b, second fixed part; 121, fixed column; 122, through hole; 123, fixed table; 124, opening; 125, first protrusion; 126, second protrusion; 127, ventilation hole;

[0030] 130, protective cover; 131, first protective plate; 132, second protective plate; 133, cover body;

[0031] 140, mounting flange; 141, mounting hole;

[0032] 200, branch copper bar. DETAILED DESCRIPTION

[0033] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0034] In the present application, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "assembly", "connection" and the like should be understood broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection; can be directly connected, can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, the described features, structures or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to give a thorough understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be used. In other cases, well-known methods, devices, implementations or operations are not shown or described in detail to avoid obscuring the aspects of the present application.

[0037] Figure 1 A structure diagram showing that the fixing block provided by the embodiment of the present application is fixed on the fixing plate is shown.

[0038] Figure 2 A structure diagram showing that the branch copper bar provided by the embodiment of the present application is fixed on the contact box is shown.

[0039] Figure 3A structure schematic diagram of the flange installed on one side of the shell body is shown.

[0040] Figure 4 A structure schematic diagram of the fixed plate provided with a protective cover on one side is shown. Figure 5 A structure schematic diagram of the fixed plate provided with a through hole, a positioning hole and a heat dissipation hole is shown.

[0041] Referring to Figure 1 The contact box 100 provided by the embodiment of the present application is used for a switch device, which comprises a shell body 110, a fixed block 120 and a fixing member (not shown in the figure), the shell body 110 is fixedly connected with the fixed block 120 through the fixing member, and the fixed block 120 can be used to clamp a branch copper bar 200, so as to fix the branch copper bar 200 on the shell body 110.

[0042] Referring to Figure 3 The shell body 110 is a sleeve type cylindrical structure, which is hollow inside, so as to facilitate the insertion of the branch copper bar 200 into the inside of the shell body 110.

[0043] In some embodiments of the present application, referring to Figure 1 and Figure 3 One end of the shell body 110 is open, and the other end is provided with a fixed plate 111, and the middle part of the fixed plate 111 is provided with a through hole 1110 which penetrates in the axial direction of the shell body 110.

[0044] The through hole 1110 can be designed according to the shape of the branch copper bar 200, such as a circular shape, an elliptical shape, a triangular shape and the like.

[0045] In addition, referring to Figure 4 The fixed plate 111 is further provided with a positioning hole 1111 which is opened in the axial direction of the shell body 110. The positioning hole 1111 and the through hole 1110 are arranged at intervals from each other, and the positioning hole 1111 can be designed as a circular hole, an elliptical hole or a hole of other shapes.

[0046] In some embodiments of the present application, the fixed block 120 can be sleeved on the outside of the branch copper bar 200, so as to clamp the branch copper bar 200.

[0047] Figure 6 A structure schematic diagram of the fixed block provided by the embodiment of the present application is shown.

[0048] Referring to Figure 6As shown, the fixing block 120 can be provided with a fixing column 121 protruding towards one side of the shell body 110, and the fixing column 121 corresponds to the positioning hole 1111 and can be inserted into the positioning hole 1111 to prevent the relative movement of the fixing block 120 in the radial direction and the circumferential direction of the shell body 110, thereby ensuring the stability of the fixing block 120 and the shell body 110.

[0049] In some embodiments of the present application, the fixing member can be inserted into the fixing column 121 and the positioning hole 1111 to fix the fixing block 120 on the fixing plate 111, thereby preventing the displacement of the fixing block 120 and the fixing plate 111 in the axial direction of the shell body 110.

[0050] The fixing column 121 is inserted into the positioning hole 1111, and the fixing block 120 and the fixing plate 111 are fixedly connected by the fixing member, thereby limiting the movement of the fixing block 120 in the axial direction, the radial direction and the circumferential direction of the shell body 110, and ensuring the stability of the connection between the fixing block 120 and the shell body 110. By sleeving the fixing block 120 outside the branch copper bar 200 and fixing the fixing block 120 and the shell body 110, the branch copper bar 200 can be stably fixed on the contact box 100, thereby avoiding the deflection of the branch copper bar 200 under external force, avoiding the decrease of the distance between the branch copper bars 200 of different phases, and avoiding the problem of pressure breakdown. In addition, the branch copper bar 200 is inserted into the contact box 100 from the through hole 1110 at the middle position of the shell body 110, which can ensure the good centering of the branch copper bar 200 in the contact box 100.

[0051] It is worth mentioning that, as shown in Figure 2 When the branch copper bar 200 is inserted into the shell body 110, the fixing block 120 and the fixing plate 111 are arranged in close contact with each other, thereby ensuring the fixing effect between the fixing block 120 and the fixing plate 111.

[0052] In addition, the fixing member can be a fastener such as a bolt or a screw.

[0053] In some embodiments of the present application, as shown in Figure 4 and Figure 5 The fixing plate 111 is provided with a plurality of positioning holes 1111 arranged at intervals, and the fixing block 120 is provided with a plurality of fixing columns 121 arranged at intervals, and the fixing column 121 corresponds to the positioning hole 1111.

[0054] As shown in Figure 1 , Figure 4 and Figure 6As shown, the fixing block 120 can be inserted into the plurality of positioning holes 1111 on the fixing plate 111 through the plurality of fixing columns 121, so as to realize the fixed connection between the fixing block 120 and the fixing plate 111. The plurality of fixing columns 121 and the plurality of positioning holes 1111 can further limit the displacement between the fixing block 120 and the fixing plate 111, ensure the limiting effect between the fixing block 120 and the fixing plate 111, and thus better ensure that the branch copper bar 200 will not be deflected under external force.

[0055] For example, referring to Figure 5 and Figure 6 As shown, the fixing plate 111 is provided with four positioning holes 1111, two of which are located on one side of the axis symmetry line of the shell body 110, and the other two are located on the other side of the axis symmetry line of the shell body 110, that is, the two pairs of positioning holes 1111 are arranged symmetrically with respect to the axis symmetry line of the shell body 110. By arranging two positioning holes 1111 on opposite sides of the axis symmetry line of the shell body 110, the stress uniformity of the fixing block 120 can be ensured, and the inclination caused by external force can be avoided, thereby ensuring the tightness of the connection between the fixing block 120 and the shell body 110. Correspondingly, the fixing block 120 can be provided with four fixing columns 121, which are respectively inserted into the four positioning holes 1111 to fix the fixing block 120 on the fixing plate 111.

[0056] In some embodiments of the present application, referring to Figure 5 As shown, the fixing block 120 is provided with a through hole 122 corresponding to the through hole 1110, that is, the through hole 122 is arranged at the center position of the fixing block 120 and surrounds the branch copper bar 200.

[0057] In some embodiments of the present application, referring to Figure 6 As shown, the fixing block 120 is provided with a plurality of fixing platforms 123 arranged at intervals at the through hole 122, and the fixing platforms 123 are arranged to extend in the radial direction of the through hole 122, that is, the fixing platforms 123 are arranged to protrude towards the center of the through hole 122.

[0058] Referring to Figure 2 and Figure 6 As shown, the plurality of fixing platforms 123 can be arranged to surround the outer side wall of the branch copper bar 200, that is, the fixing platforms 123 are arranged to abut the outer side wall of the branch copper bar 200, thereby improving the clamping force on the branch copper bar 200, further limiting the position of the branch copper bar 200 in the shell body 110, avoiding deflection under external force, ensuring the centering degree of the branch copper bar 200, avoiding the reduction of the distance between the branch copper bars 200 of different phases, and ensuring that pressure breakdown will not occur.

[0059] In some embodiments of the present application, referring to Figure 6As shown, the fixed block 120 includes a first fixed part 120a and a second fixed part 120b.

[0060] The first fixed part 120a and the second fixed part 120b can be spliced with each other or can be split from each other. When the first fixed part 120a and the second fixed part 120b are spliced with each other, the first fixed part 120a and the second fixed part 120b form the through hole 122 described above to clamp the branch copper bar 200 and limit the rotation of the branch copper bar 200. When the first fixed part 120a and the second fixed part 120b are split, the branch copper bar 200 is taken out from between the first fixed part 120a and the second fixed part 120b, so as to replace or maintain the branch copper bar 200.

[0061] Wherein, referring to Figure 6 As shown, the first fixed part 120a and the second fixed part 120b are provided with an opening 124 penetrating in the radial direction of the shell body 110, and a bolt or a screw or the like structure is installed in the opening 124 to realize the combination of the first fixed part 120a and the second fixed part 120b.

[0062] It should be noted that, referring to Figure 6 As shown, the first fixed part 120a and the second fixed part 120b are respectively provided with two fixed columns 121, and the first fixed part 120a and the second fixed part 120b are both symmetrically arranged relative to the axis of symmetry of the shell body 110, that is, the first fixed part 120a and the second fixed part 120b are axisymmetric figures.

[0063] In some embodiments of the present application, referring to Figure 1 As shown, the first fixed part 120a can be provided with a first protrusion 125, and the first protrusion 125 can be arranged on the fixed table 123 on the first fixed part 120a and protrude towards the second fixed part 120b. The second fixed part 120b is provided with a second protrusion 126, and the second protrusion 126 is arranged on the fixed table 123 on the second fixed part 120b, and the second protrusion 126 can be arranged opposite to the first protrusion 125, and the second protrusion 126 protrudes towards the first fixed part 120a.

[0064] In some embodiments of the present application, the branch copper bar 200 is provided with a first limiting hole (not marked in the figure) and a second limiting hole (not marked in the figure). The first limiting hole and the second limiting hole are respectively arranged on opposite sides of the branch copper bar 200. The first protrusion 125 is inserted into the first limiting hole, and the second protrusion 126 is inserted into the second limiting hole, so as to limit the displacement of the branch copper bar 200 in the circumferential direction, the radial direction and the axial direction, avoid the deflection of the branch copper bar 200 under the action of external force, and ensure the good centering degree of the branch copper bar 200.

[0065] It can be understood that, referring to Figure 1As shown, the first protrusion 125 is arranged on the fixing base 123, and the second protrusion 126 is arranged on the fixing base 123, so that the first protrusion 125 can be effectively inserted into the first limiting hole, and the second protrusion 126 can be effectively inserted into the second limiting hole, thereby ensuring the fixing effect of the branch copper bar 200, avoiding the deflection of the branch copper bar 200 under the action of external force, and ensuring the good centering degree of the branch copper bar 200.

[0066] In some embodiments of the present application, referring to Figure 4 and Figure 5 As shown, a plurality of heat dissipation holes 1112 penetrating the shell body 110 in the axial direction are arranged on the fixing plate 111. The heat dissipation holes 1112 are in communication with the inside and outside of the shell body 110. The plurality of heat dissipation holes 1112 are arranged at intervals between the positioning holes 1111, so as to avoid the heat dissipation holes 1112 being blocked when the fixing block 120 is attached to the fixing plate 111.

[0067] It should be noted that the opening direction of the heat dissipation holes 1112 is the same as the axial direction of the shell body 110, that is, the heat dissipation holes 1112 communicate the inside and outside of the shell body 110.

[0068] It can be understood that by arranging the heat dissipation holes 1112 on the fixing plate 111, the branch bus in the branch copper bar 200 can have good heat dissipation inside the shell body 110, thereby reducing the occurrence of accidents.

[0069] In addition, the heat dissipation holes 1112 can be circular, oval, waist round holes, etc., but are not limited thereto.

[0070] For example, referring to Figure 5 As shown, the heat dissipation holes 1112 include circular holes and waist round holes. It can be understood that the larger the opening area of the heat dissipation holes 1112, the better the heat dissipation effect.

[0071] In some embodiments of the present application, referring to Figure 5 As shown, the plurality of heat dissipation holes 1112 and the plurality of positioning holes 1111 are arranged in an annular array on the fixing plate 111. On the one hand, when the fixing block 120 is attached to one side of the fixing plate 111, the heat dissipation holes 1112 can avoid the fixing block 120, thereby ensuring the heat dissipation effect inside the shell body 110. On the other hand, by arranging in an array, the heat inside the shell body 110 can be uniformly released to the outside, thereby further ensuring the heat dissipation effect.

[0072] It should be noted that the fixing plate 111, as well as the positioning holes 1111 and the heat dissipation holes 1112 arranged thereon, are axisymmetric figures.

[0073] In some embodiments of the present application, referring to Figure 6As shown, the fixing block 120 is further provided with a plurality of ventilation holes 127 axially formed in the shell body 110. The ventilation holes 127 can communicate the outside and the inside of the shell body 110, so as to increase the ventilation area of the shell body 110 and the outside, and improve the heat dissipation effect of the inside of the contact box 100.

[0074] In some embodiments of the present application, referring to Figure 4 As shown, the contact box 100 further comprises a protective cover 130 arranged on the side of the fixing plate 111 away from the shell body 110, which can coat the fixing block 120 to effectively protect the fixing block 120 from interphase discharge.

[0075] In some embodiments of the present application, referring to Figure 1 and Figure 4 As shown, the protective cover 130 comprises a first protective plate 131, a second protective plate 132 and a cover body 133. The first protective plate 131 and the second protective plate 132 are arranged oppositely and parallelly, and are arranged in a similar triangular shape. One end of the cover body 133 is connected with the first protective plate 131, and the other end is connected with the second protective plate 132, i.e. the first protective plate 131 is connected with the second protective plate 132 through the cover body 133, and the first protective plate 131, the second protective plate 132 and the cover body 133 can coat the fixing block 120 to effectively prevent the fixing block 120 from interphase discharge.

[0076] It should be noted that the cover body 133 can adopt a circular arc structure, a rectangular structure or other shapes, as long as it can connect the first protective plate 131 and the second protective plate 132 and coat the fixing block 120.

[0077] For example, the cover body 133 is a semicircular arc structure, the side edges of which are connected with the first protective plate 131 and the second protective plate 132 respectively, and the cover body 133 is connected with the side of the fixing plate 111 away from the shell body 110 and extends along the outer edge of the fixing plate 111, so as to coat the fixing block 120 and effectively prevent the fixing block 120 from interphase discharge.

[0078] In some embodiments of the present application, the height of the fixing plate 111 is higher than the height of the shell body 110, and the opposite ends of the fixing plate 111 are connected with the first protective plate 131 and the second protective plate 132 respectively, so that the fixing plate 111 can further prevent the fixing block 120 from interphase discharge.

[0079] In some embodiments of the present application, the shell body 110 can be formed by an epoxy resin automatic pressure gel molding process under the optimal process parameters determined by using a CAE analysis software.

[0080] In some embodiments of the present application, the contact box 100 further comprises a mounting flange 140. The mounting flange 140 is arranged on the side of the shell body 110 with the opening, and a plurality of mounting holes 141 are arranged on the mounting flange 140. The contact box 100 can be mounted on the contact box mounting plate structure in the switchgear through the mounting holes 141.

[0081] In some embodiments of the present application, the number of mounting holes 141 can be four, but is not limited thereto. In addition, the mounting holes 141 can be threaded holes, which can be fixed to the contact box mounting plate structure in the switchgear through screws, rivets or other fixing structures.

[0082] Referring to Figure 2 The present application further provides a busbar device of a switchgear, which comprises a branch copper bar 200 and the above-mentioned contact box 100. The branch copper bar 200 comprises a branch busbar and a tube body arranged outside the branch busbar, and the tube body can adopt a cylindrical structure. The branch copper bar 200 is inserted into the shell body 110 through the through hole 1110 in the middle of the shell body 110 and is fixed to the shell body 110 through the fixing block 120 and the fixing member. This is used to limit the deflection of the branch copper bar 200 under the action of external force, ensure that the branch busbar in the branch copper bar 200 has good centering, avoid the distance between the branch copper bars 200 of different phases becoming small, and ensure that the problem of withstand voltage breakdown does not occur.

[0083] The fixing plate 111 in the present application is provided with a positioning hole 1111, and the fixing block 120 is provided with a fixing column 121. The fixing column 121 can be inserted into the positioning hole 1111 on the fixing plate 111 and is fixed to the fixing plate 111 through the fixing member, so as to realize the fixation of the fixing block 120 to the fixing plate 111 without relative movement. The branch copper bar 200 is fixed to the shell body 110 through the fixing block 120 arranged outside, so as to fix the branch copper bar 200 to the contact box 100, avoid the deflection of the branch copper bar 200 under the action of external force, avoid the distance between the branch copper bars 200 of different phases becoming small, and ensure that the problem of withstand voltage breakdown does not occur. In addition, the good centering of the branch copper bar 200 in the contact box 100 can also be ensured by inserting the branch copper bar 200 into the through hole 1110 in the middle of the shell body 110.

[0084] The present application further provides an air-insulated medium-voltage switchgear, which comprises the above-mentioned busbar device of a switchgear.

[0085] In the description of the specification, the description of the terms "some embodiments", "exemplarily" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application. Any changes or modifications made in accordance with the claims and specification of the present application shall be within the scope of the present application.

Claims

1. A contact box for a switchgear, characterized in that The contact box comprises: a shell body, which is in a sleeve structure, one end of the shell body being open, the other end being provided with a fixed plate, a through hole being provided in the middle of the fixed plate for inserting a branch copper bar into the shell body, and a positioning hole being formed in the fixed plate; a fixed block, which is sleeved on the outside of the branch copper bar, one side of the fixed block facing the shell body being provided with a fixed column corresponding to the positioning hole, the fixed column being capable of being inserted into the positioning hole; a fixing member, which is inserted into the fixed column and the positioning hole to fix the fixed block to the shell body.

2. The contact box of claim 1, wherein, A plurality of positioning holes are formed in the fixed plate, and the plurality of positioning holes are arranged at intervals. A plurality of fixed columns are provided on the fixed block, and the fixed columns correspond to the positioning holes one by one.

3. The contact cartridge of claim 1, wherein, The fixed block is provided with a through hole corresponding to the through hole, and the fixed block is provided with a plurality of fixed platforms arranged at intervals at the through hole, and the fixed platforms are arranged around the outer sidewall of the branch copper bar.

4. The contact cartridge of claim 2, wherein, A plurality of heat dissipation holes are formed in the fixed plate, and the plurality of heat dissipation holes are arranged at intervals with the positioning holes.

5. The contact box of claim 4, wherein, The plurality of heat dissipation holes and the plurality of positioning holes are arranged in an annular array on the fixed plate.

6. The contact cartridge of claim 1, wherein, The contact box further comprises: a protective cover, which is arranged on the side of the fixed plate away from the shell body, the protective cover comprising a first protective plate, a second protective plate, and a cover body, the first protective plate and the second protective plate being arranged opposite to and parallel to each other, one end of the cover body being connected to the first protective plate, and the other end of the cover body being connected to the second protective plate.

7. The contact box of claim 6, wherein, The cover body is in a circular arc structure, and the cover body extends along the outer edge of the fixed plate.

8. The contact cartridge of claim 1, wherein, The contact box further comprises: a mounting flange, which is arranged on the side of the shell body where the opening is formed, the mounting flange being provided with a mounting hole, and the mounting flange being mounted on the switch device through the mounting hole.

9. A busbar arrangement of a switchgear, characterized in that It comprises: a branch copper bar, which comprises a branch bus and a pipe body arranged on the outside of the branch bus; The contact box according to any one of claims 1 to 8, the branch copper bar being inserted into the shell body through the through hole on the shell body and being fixed to the shell body through the fixed block and the fixing member.

10. An air-insulated medium voltage switchgear, characterized by The busbar device comprises the switch device according to claim 9.

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