A branching device of a ring main unit

Abstract

The utility model relates to the technical field of switch cabinet, and disclose a branch device of ring main unit, including ring main unit body, the inside of ring main unit body is provided with several electronic components, the inside of ring main unit body is equipped with several silicon rubber cable head, and the top end of several silicon rubber cable head is electrically connected with dry electronic component in proper order, and the bottom of ring main unit body is equipped with branch cable, and the inside of branch cable is provided with several branch cable. The utility model is formed multifunctional support structure through the support frame, the combined groove, two auxiliary frames and several composite supports, and can utilize the sliding of composite support in the inside of support frame and the use effect of being able to separate from support frame after the combined use of subsequent cooperation several silicon rubber cable head, provides displacement adjustment, vertical support and convenient replacement etc. Working conditions in the installation process of silicon rubber cable head and electronic component, solves the problem existing in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, specifically a branching device for a ring main unit. Background Technology

[0002] Ring main units (RNUs) are fully sealed and insulated medium-voltage switchgear. Their primary circuit and incoming / outgoing cable connections are all within a fully sealed and insulated structure, resulting in high levels of weather resistance and pollution resistance. RNUs are commonly used in power systems for switching, controlling, or protecting against power generation, transmission, distribution, energy conversion, and consumption. They are suitable for various locations including power plants, substations, petrochemical plants, metallurgical steel mills, light industry textiles, factories and mines, residential communities, and high-rise buildings, and are particularly suitable for harsh outdoor, roadside, and polluted environments.

[0003] Currently, a ring main unit consists of a sealed gas chamber and a connection structure. The sealed gas chamber contains switches and connecting components forming the primary circuit, which can be filled with SF6 gas or other environmentally friendly gases as insulation or arc-extinguishing media. The connecting components mainly consist of external cables. The primary switch circuit inside the gas chamber is fully sealed and insulated from the external cables via insulating sleeves on the gas chamber and dedicated silicone rubber cable heads. The external cables are typically three-phase parallel, connected to the insulating sleeves on the gas chamber via dedicated silicone rubber cable heads for a fully sealed and insulated connection. This requires each cable to have a reliable fixed support to ensure the verticality and robustness of the cable connection.

[0004] However, in actual installation, existing technologies mostly use fixed brackets to support and limit the silicone rubber cable heads in ring main units. This greatly limits the convenience of installation and the flexibility of subsequent maintenance and replacement. In addition, the internal space of the ring main unit is limited, and the distance between the two silicone rubber cable heads in the fixed position cannot be adjusted, so installation interference often occurs. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a branching device for a ring main unit, which solves the problems mentioned in the background section.

[0006] This utility model provides the following technical solution: a branching device for a ring main unit, comprising a ring main unit body, wherein a plurality of electronic components are disposed inside the ring main unit body, and a plurality of silicone rubber cable heads are fitted inside the ring main unit body, wherein the top ends of the plurality of silicone rubber cable heads are electrically connected to the plurality of electronic components in sequence, wherein a stranded cable is fitted inside the bottom of the ring main unit body, and a plurality of branch cables are disposed inside the stranded cable, wherein one end of the plurality of branch cables can be electrically connected to the bottom end of the silicone rubber cable head respectively, wherein an adjusting bracket is fitted inside the top of the ring main unit body, the adjusting bracket comprising a support frame, wherein auxiliary frames are installed between the two sides of the support frame and the inner wall of the ring main unit body, wherein a combination groove communicating with its own space is opened on the top of one side of the support frame, and a plurality of composite supports are arranged and installed inside the support frame, wherein the front end structure of the composite support can be fitted and limited with the bottom of the corresponding silicone rubber cable head, and the composite support can be separated from the support frame through the combination groove.

[0007] Preferably, the composite support includes a square bracket, an extension sleeve, and a combination nut. The square bracket is snapped into the inside of the support frame. The rear end of the extension sleeve passes through the square bracket and extends to the outside of the rear end of the square bracket. The front end of the extension sleeve is configured as a ring structure to fit the bottom of the silicone rubber cable head. The combination nut is threaded onto the rear end surface of the extension sleeve and cooperates with the square bracket to clamp and hold the extension sleeve.

[0008] Preferably, the top of the support frame is provided with a plurality of positioning screw holes, and the positioning screw holes located within the top range of the square card seat are internally threaded with positioning screws that can limit the pressure on the top structure of the composite support.

[0009] Preferably, the top of the square card holder is provided with a sliding groove that can engage with the inner wall structure of the top of the support frame. The square card holder and the extension sleeve are both made of thermally conductive and insulating material, and the combination nut is made of insulating material.

[0010] Preferably, the bottom of the square card holder is provided with a semi-open groove, and an auxiliary cylinder that is fixedly sleeved on the inner side of the bottom of the support frame is engaged in the semi-open groove.

[0011] Preferably, both ends of the auxiliary cylinder extend through to the outside of the support frame. The interior of the auxiliary frame is provided with an adjustment groove that can engage with the end of the auxiliary cylinder. Nuts are threaded onto the surfaces of both ends of the auxiliary cylinder, and the two nuts can clamp and limit the connection between the auxiliary frame and the support frame during the spiral engagement with the auxiliary cylinder.

[0012] Preferably, the inner wall of the auxiliary cylinder is equipped with a number of heat sinks along its circumference, and both the support frame and the auxiliary cylinder are made of thermally conductive metal material.

[0013] Preferably, the rear end structure of the auxiliary frame has a strip groove, and the inner wall of the rear end of the ring main unit has a screw hole that can be aligned with the strip groove. The rear end structure of the auxiliary frame and the inner wall of the ring main unit can be detachably installed by means of screws fitting into the strip groove and then threadedly connecting to the screw hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model forms a multifunctional support structure through a support frame, a combination groove, two auxiliary frames, and several composite supports. When used in conjunction with several silicone rubber cable heads, the composite supports can slide inside the support frame and detach from the support frame to provide displacement adjustment, vertical support, and convenient replacement during the installation of silicone rubber cable heads and electronic components, thus solving the problems existing in the prior art and improving installation efficiency.

[0015] 2. This utility model uses an auxiliary cylinder and several heat sinks as auxiliary structures. Based on the multi-functional support structure, it can use the waste heat generated by the conductive silicone rubber cable head from the composite support and support frame to heat the air inside the auxiliary cylinder. Then, it uses the convection of hot and cold air to accelerate the air flow speed inside the auxiliary cylinder, and finally achieves the auxiliary effect of accelerating the heat dissipation of the silicone rubber cable head. Attached Figure Description

[0016] Figure 1 This is a front view of the structural support frame of this utility model; Figure 2 This is a three-dimensional schematic diagram of the structure of this utility model; Figure 3 This is a three-dimensional schematic diagram of the structural support frame of this utility model; Figure 4 This is a top view of the structural support frame of this utility model; Figure 5 This is an enlarged schematic diagram of the structural composite support of this utility model.

[0017] In the diagram: 1. Ring main unit body; 2. Electronic components; 3. Support frame; 4. Silicone rubber cable head; 5. Composite support; 51. Square bracket; 52. Extension sleeve; 53. Combination nut; 6. Combination groove; 7. Positioning screw hole; 8. Positioning screw; 9. Auxiliary frame; 10. Auxiliary cylinder; 11. Nut; 12. Adjustment groove; 13. Heat sink. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 and Figure 5 A branching device for a ring main unit includes a ring main unit body 1. The ring main unit body 1 contains several electronic components 2. The ring main unit body 1 also contains several silicone rubber cable heads 4, with the top ends of the silicone rubber cable heads 4 sequentially electrically connected to the electronic components 2. The bottom of the ring main unit body 1 contains a stranded cable 14, which contains several branch cables. One end of each branch cable is electrically connected to the bottom end of the silicone rubber cable head 4. The top of the ring main unit body 1 contains an adjusting bracket, which includes a support frame 3. Auxiliary frames 9 are installed between both sides of the support frame 3 and the inner wall of the ring main unit body 1. A combination groove 6 communicating with its own space is opened on the top of one side of the support frame 3. Several composite supports 5 are arranged inside the support frame 3. The front end structure of the composite support 5 can be fitted and limited to the bottom of the corresponding silicone rubber cable head 4, and the composite support 5 can be separated from the support frame 3 through the combination groove 6. The composite support 5 includes a square bracket 51, an extension sleeve 52, and a combination nut 53. The square bracket 51 is snapped into the inside of the support frame 3. The rear end of the extension sleeve 52 passes through the square bracket 51 and extends to the outside of the rear end of the square bracket 51. The front end of the extension sleeve 52 is set as a ring structure to fit the bottom of the silicone rubber cable head 4. The combination nut 53 is threaded to the rear end surface of the extension sleeve 52 and cooperates with the square bracket 51 to fit and clamp the extension sleeve 52. The top of the support frame 3 is provided with several positioning screw holes 7. The positioning screw holes 7 located within the top range of the square card seat 51 are internally threaded with positioning screws 8 that can limit the pressure on the top structure of the composite support 5.

[0020] In use, for the installation of multiple electronic components 2 and the corresponding number of silicone rubber cable heads 4, the composite support 5 can be used in conjunction with the support frame 3 and the auxiliary frame 9 for assembly, as follows; The bottom of the silicone rubber cable head 4 is fitted into the front end of the corresponding square bracket 51 for assembly and installation. After multiple silicone rubber cable heads 4 are fitted into their respective square brackets 51, the top of the silicone rubber cable head 4 is connected to the front end of the electronic component 2. In the specific implementation process, for other silicone rubber cable heads 4 that are not connected at the moment, the corresponding composite support 5 can be pushed to move the other silicone rubber cable heads 4 away from the silicone rubber cable heads 4 in use or to move the silicone rubber cable heads 4 in use and the composite support 5 to make room for them, thereby optimizing the use of the space inside the support frame 3. After multiple silicone rubber cable heads 4 are installed, the multiple branch cables inside the stranded cable 14 are connected to the bottom of the multiple silicone rubber cable heads 4 in sequence to complete the final assembly operation. After the multiple silicone rubber cable heads 4 are assembled, multiple positioning screws 8 are then threadedly connected to the corresponding positioning screw holes 7 of the multiple composite supports 5 until the bottom of the multiple positioning screws 8 presses and limits the top of the multiple composite supports 5 in sequence. This fully ensures the vertical state and support strength of the silicone rubber cable heads 4 after they are connected to the electronic components 2 and the internal branch cables of the stranded cables 14, and ensures the stability of the overall device during use.

[0021] Please see Figure 1 and Figure 5 The top of the square card holder 51 has a groove that can engage with the inner wall structure of the top of the support frame 3. The square card holder 51 and the extension sleeve 52 are both made of thermally conductive and insulating material, and the combination nut 53 is made of insulating material. The bottom of the square card holder 51 has a semi-open groove, and an auxiliary cylinder 10 fixedly sleeved on the inner side of the bottom of the support frame 3 is engaged in the semi-open groove. Both ends of the auxiliary cylinder 10 extend through to the outer side of the support frame 3. The interior of the auxiliary frame 9 has an adjustment groove 12 that can engage with the end of the auxiliary cylinder 10. Nuts 11 are threaded on the surfaces of both ends of the auxiliary cylinder 10, and the two nuts 11 can clamp and limit the connection between the auxiliary frame 9 and the support frame 3 during the spiral engagement with the auxiliary cylinder 10. Several heat sinks 13 are installed on the inner wall of the auxiliary cylinder 10 along its circumference, and the support frame 3 and the auxiliary cylinder 10 are both made of thermally conductive metal material. The rear end structure of the auxiliary frame 9 has a strip groove, and the inner wall of the rear end of the ring main unit 1 has a screw hole that can be aligned with the strip groove. The rear end structure of the auxiliary frame 9 and the inner wall of the ring main unit 1 can be detached and installed by means of screws and strip groove assembly and then threaded connection with screw hole.

[0022] In use, considering the heat dissipation requirements of the silicone rubber cable head 4 during subsequent use, the waste heat generated by the silicone rubber cable head 4 energized by the auxiliary cylinder 10 and multiple heat sinks 13 is used to heat the air inside the auxiliary cylinder 10. Then, the air flow speed inside the auxiliary cylinder 10 is accelerated by the convection of hot and cold air, thereby increasing the self-heating speed of the silicone rubber cable head 4 and extending the service life of the silicone rubber cable head 4.

[0023] Secondly, considering the need to adjust the distance between the support frame 3 and the inner wall of the ring main unit 1, it can be detachably adjusted by two auxiliary frames 9. Specifically, first, turn the two nuts 11 so that the two nuts 11 are far away from their respective auxiliary frames 9. Then, push the support frame 3 and use the locking of the auxiliary cylinder 10 and the adjustment groove 12 to adjust the front and back displacement until the appropriate position is reached. Then, reset and lock the two nuts 11. Furthermore, to meet the need for convenient maintenance of the support frame 3 and its associated structures, the support frame 3 and its associated structures can be modularly replaced by removing the screws between the auxiliary frame 9 and the inner wall of the ring main unit 1.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A branching device for a ring main unit, comprising a ring main unit body (1), wherein a plurality of electronic components (2) are disposed inside the ring main unit body (1), and a plurality of silicone rubber cable heads (4) are fitted inside the ring main unit body (1), wherein the top ends of the plurality of silicone rubber cable heads (4) are electrically connected in sequence to the plurality of electronic components (2), wherein a stranded cable (14) is fitted inside the bottom of the ring main unit body (1), and a plurality of branch cables are disposed inside the stranded cable (14), wherein one end of the plurality of branch cables can be electrically connected to the bottom end of the silicone rubber cable head (4) respectively, characterized in that: An adjustment bracket is fitted inside the top of the ring main unit (1). The adjustment bracket includes a support frame (3). Auxiliary frames (9) are installed between the two sides of the support frame (3) and the inner wall of the ring main unit (1). A combination groove (6) communicating with its own space is opened on the top of one side of the support frame (3). Several composite supports (5) are arranged inside the support frame (3). The front end structure of the composite support (5) can be fitted and limited at the bottom of the corresponding silicone rubber cable head (4). The composite support (5) can be separated from the support frame (3) through the combination groove (6).

2. The branching device for a ring main unit according to claim 1, characterized in that: The composite support (5) includes a square bracket (51), an extension sleeve (52), and a combination nut (53). The square bracket (51) is snapped into the inside of the support frame (3). The rear end of the extension sleeve (52) passes through the square bracket (51) and extends to the outside of the rear end of the square bracket (51). The front end of the extension sleeve (52) is set as a ring structure to fit the bottom of the silicone rubber cable head (4). The combination nut (53) is threaded to the rear end surface of the extension sleeve (52) and cooperates with the square bracket (51) to clamp the extension sleeve (52).

3. The branching device for a ring main unit according to claim 1, characterized in that: The top of the support frame (3) is provided with a number of positioning screw holes (7), and the positioning screw holes (7) located in the top range of the square card seat (51) are internally threaded with positioning screws (8) that can limit the pressure of the top structure of the composite support (5).

4. The branching device for a ring main unit according to claim 2, characterized in that: The square card holder (51) has a groove on its top that can engage with the inner wall structure of the top of the support frame (3). The square card holder (51) and the extension sleeve (52) are both made of thermally conductive and insulating material, and the combination nut (53) is made of insulating material.

5. A branching device for a ring main unit according to claim 2, characterized in that: The bottom of the square card holder (51) is provided with a semi-open groove, and an auxiliary cylinder (10) is fixedly sleeved on the inner side of the bottom of the support frame (3) in the semi-open groove.

6. The branching device for a ring main unit according to claim 5, characterized in that: Both ends of the auxiliary cylinder (10) extend through to the outside of the support frame (3). The auxiliary frame (9) has an adjustment groove (12) inside that can engage with the end of the auxiliary cylinder (10). Nuts (11) are threaded onto the surfaces of both ends of the auxiliary cylinder (10). The two nuts (11) can clamp and limit the connection between the auxiliary frame (9) and the support frame (3) during the spiral engagement with the auxiliary cylinder (10).

7. The branching device for a ring main unit according to claim 5, characterized in that: The inner wall of the auxiliary cylinder (10) is equipped with several heat sinks (13) along its circumference, and both the support frame (3) and the auxiliary cylinder (10) are made of thermally conductive metal material.

8. The branching device for a ring main unit according to claim 1, characterized in that: The auxiliary frame (9) has a strip groove at its rear end, and the inner wall of the rear end of the ring main unit (1) has a screw hole that can be aligned with the strip groove. The auxiliary frame (9) and the inner wall of the ring main unit (1) can be detachably installed by means of screws and strip groove fitting together and then threaded connection with the screw hole.

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