Three-phase junction box

Abstract

The utility model relates to the technical field of junction boxes, in particular to a three-phase junction box, which comprises a body box, a moving assembly, a mounting plate, a copper bar and a metal ridge member, the moving assembly is arranged in the upper end of the body box, the copper bar plate is arranged at the upper end of the body box, the copper bar is arranged below the mounting plate, and the metal ridge member is arranged in the body box. According to the three-phase junction box of the utility model, the characteristics of the epoxy resin casting body are utilized to ensure that the power utilization safety can still be satisfied under the condition of length requirement, the copper bar can be replaced conveniently through the arrangement of the moving assembly, and the metal ridge member is arranged to ensure that the copper bar can be replaced conveniently, so that the service life of the three-phase junction box can be prolonged greatly, and the service life of the three-phase junction box can be prolonged. And the mounting strength is enhanced.

Description

Technical Field

[0001] This utility model relates to the technical field of junction boxes, and in particular to a three-phase junction box. Background Technology

[0002] On the 35KV switchgear with one inlet and nine outlets, the switchgear requires eight 35KV outputs, one of which supplies low-voltage 380V power through a 35KV / 0.4KV transformer. The 35KV switchgear uses gas-tight insulation. Under secondary pollution conditions, the minimum distance between each phase of the 35KV switchgear is 300mm. This does not meet the requirements when using pure air insulation.

[0003] Currently, the internal structure of the junction box used in the incoming line cabinet of the 35KV skid-mounted integrated mobile substation consists of three 35KV high-post insulators. With sufficient air insulation distance, a 3mm epoxy insulation board is used to reinforce the middle to ensure the safety between each phase of 35KV. However, this type of junction box has requirements on the length of space, and the high-post insulators of this type of junction box cannot be replaced according to the size of the current. Only the entire junction box can be replaced, which not only reduces work efficiency but also wastes materials.

[0004] Therefore, there is an urgent need to redesign a three-phase junction box to solve the above problems. Utility Model Content

[0005] This utility model provides a three-phase junction box to solve the technical problems mentioned in the background art.

[0006] This utility model provides a three-phase junction box, which includes a main body box, a movable component, a mounting plate, a copper busbar, a metal retainer, and a flip-top plate. The main body box has a receiving cavity at its upper end, the movable component is disposed in the receiving cavity, the mounting plate is disposed at the upper end of the main body box, the copper busbar is disposed below the mounting plate, the flip-top plate is disposed on one side of the main body box, and the metal retainer is disposed around the main body box and below the copper busbar.

[0007] Furthermore, the main body box has three cavities inside, and a column is arranged between the cavities. The column is tapered, wider at the top and narrower at the bottom.

[0008] Furthermore, the number of moving components is six, and each moving component includes: a knob, a drive shaft, a first gear, a second gear, a first sliding plate, and a second sliding plate. The knob is disposed at the upper end of the main body box, and the drive shaft is connected to the knob. The first gear and the second gear are disposed on the drive shaft from top to bottom. The tip circle diameter of the first gear is larger than that of the second gear. The first sliding plate is disposed on the side of the first gear, and the second sliding plate is disposed on the side of the second gear. The first gear, the second gear, the first sliding plate, and the second sliding plate are all disposed in the receiving cavity.

[0009] Furthermore, the first sliding plate and the second sliding plate are slidably connected, and both the first sliding plate and the second sliding plate are provided with toothed grooves on their sides. The first sliding plate meshes with the first gear, the second sliding plate meshes with the second gear, and the second sliding plate is provided with threaded holes.

[0010] Furthermore, the mounting plate has a groove at the bottom, the mounting plate has a structure that is longer at the top and shorter at the bottom, and the mounting plate has threaded holes.

[0011] Furthermore, the flip cover is provided with pivots on both sides, and the flip cover is connected to the main body box through the pivots.

[0012] Beneficial effects

[0013] This three-phase junction box includes a main body box, a movable component, a mounting plate, copper busbars, and metal retainers. The main body box has a receiving cavity at its upper end, the movable component is disposed within the receiving cavity, the mounting plate is located at the upper end of the main body box, the copper busbars are located below the mounting plate, and the metal retainers are located around the main body box and below the copper busbars. The movable component includes a knob, a drive shaft, a first gear, a second gear, a first sliding plate, and a second sliding plate. The knob is located at the upper end of the main body box, and the drive shaft is connected to the knob. The first gear and the second gear are mounted on the drive shaft from top to bottom, with the first gear being larger than the second gear. The first sliding plate is located on the side of the first gear, and the second sliding plate is located on the side of the second gear. This three-phase junction box utilizes the characteristics of epoxy casting to ensure electrical safety even under length requirements. The movable component facilitates replacement of the copper busbars, and the metal retainers facilitate the fixing of the main body box and the copper busbars. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an isometric structural diagram of a three-phase junction box provided by this utility model;

[0016] Figure 2 This is a side sectional view of a three-phase junction box provided by this utility model;

[0017] Figure 3 yes Figure 2 A magnified view of a portion of region A in the middle;

[0018] Figure 4 This is a partial structural diagram of a three-phase junction box provided by this utility model;

[0019] Figure 5 This is a side sectional view of the main body box of a three-phase junction box provided by this utility model.

[0020] Figure label:

[0021] 100. Main body box; 110. Mounting plate; 120. Copper busbar; 130. Metal retaining plate; 140. Flip-top plate; 150. Shaft; 160. Column; 170. Receiving cavity;

[0022] 200, Moving component; 210, Knob; 220, Drive shaft; 230, First gear; 240, Second gear; 250, First sliding plate; 260, Second sliding plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to the present utility model are shown in the drawings, not all of the structures. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] Please see Figures 1 to 5 This utility model discloses a three-phase junction box comprising a main body box 100, a movable component 200, a mounting plate 110, a copper busbar 120, a metal retainer 130, and a flip-top plate 140. The main body box 100 is made of epoxy resin casting. A receiving cavity 170 is provided at the upper end of the main body box 100. The movable component 200 is disposed in the receiving cavity 170. The copper busbar 120 is disposed at the upper end of the main body box 100 and below the mounting plate 110. The metal retainer 130 is disposed around the main body box 100 and below the copper busbar 120. Rotating shafts 150 are provided on both sides of the flip-top plate 140, and the flip-top plate is connected to the main body box 100 through the rotating shafts 150.

[0026] The main body box 100 is an epoxy casting. Compared with traditional insulating material castings, epoxy resin castings have no or few air gaps and excellent electrical insulation properties. Furthermore, the casting process has good fluidity and uniformity, and it can maintain good insulation performance even under conditions of limited length and high voltage. At the same time, the metal retainer 130 improves the installation strength of the main body box 100 and the copper busbar 120, increasing the service life of the three-phase junction box. The flip cover 140 is in the open state during installation for easy installation and in the closed state during operation to improve electrical safety.

[0027] Furthermore, the interior of the main body box 100 is composed of several cavities, and a column 160 is arranged between the cavities. The column 160 is tapered, wider at the top and narrower at the bottom.

[0028] The column 160 is tapered with a narrow top, which facilitates demolding after casting.

[0029] Furthermore, the number of moving components 200 is six, and each moving component 200 includes: a knob 210, a drive shaft 220, a first gear 230, a second gear 240, a first sliding plate 250, and a second sliding plate 260. The knob 210 is disposed on the upper end of the main body box 100, and the drive shaft 220 is connected to the knob 210. The first gear 230 is disposed on the drive shaft 220, and the second gear 240 is disposed on the drive shaft 220. The first gear 230 is disposed above the second gear 240, and the tip circle diameter of the first gear 230 is larger than that of the second gear 240. The diameter is specified. The first sliding plate 250 is disposed on the side of the first gear 230, and the second sliding plate 260 is disposed on the side of the second gear 240. The first sliding plate 250 and the second sliding plate 260 are slidably connected. The side of the first sliding plate 250 is provided with tooth grooves, and the side of the second sliding plate 260 is provided with tooth grooves. The first sliding plate 250 meshes with the first gear 230, and the second sliding plate 260 meshes with the second gear 240. The first gear 230, the second gear 240, the first sliding plate 250, and the second sliding plate 260 are all disposed in the receiving cavity 170.

[0030] The knob 210 drives the transmission shaft 220, which in turn rotates the first gear 230 and the second gear 240. Since the sides of the first sliding plate 250 and the second sliding plate 260 are provided with toothed grooves, the first gear 230 can move the first sliding plate 250 left and right, and the second gear 240 can move the second sliding plate 260 left and right. Because the tip circle diameter of the first gear 230 is larger than that of the second gear 240, when the user rotates the knob 210 one full turn, the first sliding plate 250 moves a greater distance than the second sliding plate 260. This creates a platform between the first sliding plate 250 and the second sliding plate 260, which is used to place the mounting plate 110. The user can move the moving component 200 to a suitable position as needed for further operation.

[0031] Furthermore, the copper busbar 120 has various models depending on its size, and the mounting plate 110 has various models depending on the size of the copper busbar 120. The mounting plate 110 has a groove at its bottom and a structure that is longer at the top and shorter at the bottom. The mounting plate 110 has a threaded hole at its upper end.

[0032] Users can select the appropriate copper busbar model 120 based on their power needs and current intensity. Since the mounting plate 110 has a structure that is longer at the top and shorter at the bottom, it can be mounted on the first sliding plate 250 and the second sliding plate 260. Insulating screws can then be screwed into the threaded holes on the mounting plate 110 and the second sliding plate 260 to fix the mounting plate 110 in place. Furthermore, the groove at the bottom of the mounting plate 110 increases the creepage distance, ensuring electrical safety.

[0033] Furthermore, when a user uses a three-phase junction box provided by this utility model, firstly, according to the requirements of factors such as current intensity, a suitable copper busbar 120 is selected. Then, according to the size of the corresponding mounting plate 110, the moving component 200 is adjusted to a suitable position. Then, the mounting plate 110 is placed on the moving component 200. Then, screws are installed in the threaded holes on the mounting plate 110 and the threaded holes on the second sliding plate to fix the mounting plate 110. In addition, the pre-embedded metal retainer 130 can improve the installation strength of the main body box 100.

[0034] This utility model provides a three-phase junction box including a main body box 100, a movable component 200, a mounting plate 110, a copper busbar 120, and a metal retainer 130. The main body box 100 has a receiving cavity 170 at its upper end, and the movable component 200 is disposed in the receiving cavity 170. The copper busbar 120 is disposed at the upper end of the main body box 100 and below the mounting plate 110. The metal retainer 130 is disposed around the main body box 100 and below the copper busbar 120. The movable component 200 includes a knob 210, a drive shaft 220, a first gear 230, a second gear 240, a first sliding plate 250, and a second sliding plate 260. The knob 210 is disposed at the upper end of the main body box 100, and the drive shaft 220 is connected to the knob 210. The first gear 230 is disposed on the drive shaft 220, and the second gear 240... The first gear 230 is mounted on the transmission shaft 220 and positioned above the second gear 240. The tip circle diameter of the first gear 230 is larger than that of the second gear 240. The first sliding plate 250 is positioned on the side of the first gear 230, and the second sliding plate 260 is positioned on the side of the second gear 240. This three-phase junction box utilizes the characteristics of epoxy casting to ensure electrical safety even under length requirements. A groove is provided at the bottom of the mounting plate 110 to increase creepage distance, further enhancing electrical safety. A movable component 200 facilitates replacement of the copper busbar 120, avoiding waste and improving work efficiency. A metal retainer 130 enhances installation strength. Furthermore, the conical shape of the main body between the internal cavities of the main body box 100 facilitates demolding after casting.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A three-phase junction box, characterized in that, include: The main body box; the upper end of the main body box is provided with a receiving cavity; A movable component, the movable component being disposed within the receiving cavity; Mounting plate, which is disposed at the upper end of the main body box; A copper busbar, wherein the copper busbar is disposed below the mounting plate; Metal retaining members are disposed around the body box and below the copper busbar. A flip-top is disposed on one side of the main body box.

2. A three-phase junction box according to claim 1, characterized in that, The main body box has three cavities inside, and a column is set between the cavities. The column is tapered, wider at the top and narrower at the bottom.

3. A three-phase junction box according to claim 1, characterized in that, The number of movable components is six, and each movable component includes: a knob, a drive shaft, a first gear, a second gear, a first sliding plate, and a second sliding plate. The knob is located at the upper end of the main body box, and the drive shaft is connected to the knob. The first gear and the second gear are arranged on the drive shaft from top to bottom. The tip circle diameter of the first gear is larger than that of the second gear. The first sliding plate is located on the side of the first gear, and the second sliding plate is located on the side of the second gear. The first gear, the second gear, the first sliding plate, and the second sliding plate are all located in the receiving cavity.

4. A three-phase junction box according to claim 3, characterized in that, The first sliding plate and the second sliding plate are slidably connected. Both the first sliding plate and the second sliding plate are provided with toothed grooves on their sides. The first sliding plate meshes with the first gear, and the second sliding plate meshes with the second gear. The second sliding plate is provided with threaded holes.

5. A three-phase junction box according to claim 1, characterized in that, The mounting plate has a groove at the bottom and has a structure that is longer at the top and shorter at the bottom. The mounting plate also has threaded holes.

6. A three-phase junction box according to claim 1, characterized in that, The flip cover is provided with pivots on both sides, and the flip cover is connected to the main body box through the pivots.

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