High-voltage electric power all-insulation combined ring main unit

Abstract

The invention relates to a high-voltage electric power all-insulation combined ring main unit, which belongs to the technical field of power distribution cabinets, and is characterized in that the surface of a cabinet body is provided with an anti-corrosion layer, and the cabinet body is integrally wrapped by an insulating material; the interior of the cabinet body is divided into a wire inlet chamber, a wire outlet chamber, a bus chamber and an operating mechanism chamber, the chambers are separated by insulating partition plates, the insulating partition plates are filled with insulating oil, the surfaces of the insulating partition plates in contact with the inner wall of the cabinet body are provided with heat dissipation plates, and the heat dissipation plates are inserted into slots in the side wall of the cabinet body in a one-to-one correspondence manner; the bus comprises a copper pipe externally provided with a nano ceramic insulating coating, a connector is installed in the copper pipe in a pluggable mode, the heat dissipation system comprises a speed regulation heat dissipation fan arranged at the top of the cabinet body and a temperature sensor installed in the cabinet body, and the bottom of the cabinet body is provided with an air inlet and a filter screen cover connected to the air inlet. The side surface of the cabinet body is provided with a plurality of radiating fins which are arranged at intervals. The insulating property of the combined ring main unit is improved from the three aspects of the insulating material, the insulating structure and heat dissipation.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and in particular to a high-voltage electric power fully-insulated combined ring network cabinet. Background Art

[0002] In the distribution network system, ring main units are widely used in the ring network power supply and terminal power supply of cable lines. They can realize functions such as power distribution, control and protection, and play a key role in ensuring the reliability and stability of power supply.

[0003] However, existing ring main units (RMUs) have some obvious deficiencies. On the one hand, the insulation performance needs to be improved. During long-term operation, the insulation performance of some RMUs gradually decreases due to the influence of moisture and rising temperatures, which can easily cause local discharge or even short-circuit failures, seriously threatening the safe operation of the power system. On the other hand, the heat dissipation problem is more prominent. The electrical components in the RMUs will generate a lot of heat during operation. If they cannot be dissipated in a timely and effective manner, the component temperature will be too high, accelerating the aging of the components and reducing their performance and lifespan. In addition, the existing RMUs do not have clear partitions in their structural design. All functional components are installed in an integral space of the cabinet. Due to the lack of insulation protection between each other, they are prone to failure due to the influence of other components, which is not conducive to daily installation and use. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a high-voltage electric power fully insulated combined ring main unit to solve the problems raised in the background technology.

[0005] The present invention is achieved through the following technical solutions:

[0006] A high-voltage electric power fully insulated combined ring network cabinet, a high-voltage electric power fully insulated combined ring network cabinet, comprising a cabinet body, a busbar and a heat dissipation system. The cabinet body is a frame structure with an anti-corrosion layer on its surface. The exterior of the cabinet body is entirely wrapped with insulating material. The interior of the cabinet body is separately divided into an incoming line chamber, an outgoing line chamber, a busbar chamber and an operating mechanism chamber. Each chamber is separated by an insulating partition. The insulating partition is a hollow structure filled with insulating oil. The frame structure composed of all insulating partitions contains each chamber, and the surface of the insulating partition in contact with the inner wall of the cabinet has a plurality of heat dissipation plates arranged at intervals in an integrated manner. The inner wall of the cabinet is provided with a plurality of slots at intervals. The heat sinks are inserted into the slots one by one to achieve the installation and positioning of each chamber in the cabinet, and the heat is transferred to the cabinet through the heat sinks to dissipate heat; the busbar includes a copper tube with a nano-ceramic insulation coating on the outside, and a connector is installed in the copper tube in a pluggable manner. The connector is connected to an external cable to achieve an electrically conductive connection with the copper tube; the heat dissipation system includes a speed-regulating heat dissipation fan on the top of the cabinet and a temperature sensor installed in the cabinet. The speed-regulating heat dissipation fan accelerates as the detection value of the temperature sensor increases; the bottom of the cabinet is provided with an air inlet and a filter cover connected to the air inlet, and the side of the cabinet is provided with a plurality of heat dissipation fins arranged at intervals.

[0007] Furthermore, the heat dissipation fins are arranged to be tilted downward, and heat dissipation fins are provided on both the inner and outer walls of the cabinet, while no heat dissipation fins are provided on the inner wall of the cabinet opposite to the insulating partition.

[0008] Furthermore, a fastening bolt is provided in the solid portion of the insulating partition, and the fastening bolt threadably passes through the insulating partition and is fastened to the back of the cabinet, so that after the heat sink is inserted into the slot, the frame structure composed of the partition can be detachably fixed.

[0009] Furthermore, the busbar room is located at the bottom of the cabinet, the incoming line room and the outgoing line room are located on the left and right sides above the busbar room respectively, and the operation room is located above the outgoing line room.

[0010] Furthermore, a transversely arranged ventilation duct is fixed to the top of the inner side of the cabinet, a plurality of air inlet holes are provided on the ventilation duct, and the center of the ventilation duct is connected to the speed-regulating cooling fan.

[0011] Furthermore, the copper tube is provided with a plurality of spaced-apart plug holes along its length direction, wherein the connector is plugged into the plug holes, and the connector comprises an insulating outer column and an insulating inner column, a conductive sliding column and a plurality of bayonet pins radially slidably mounted on the insulating outer tube, wherein:

[0012] One end of the insulating outer column is axially inserted into the plug hole, and the other end thereof is axially threadedly engaged with the insulating inner column, and the insulating inner column is installed with a cable to be connected with one end of the metal wire core exposed; the sliding column includes two rectangular slides arranged near its two ends, and the center of the end faces of the two rectangular slides is respectively fixed with an extrusion disk and a stop block, the extrusion disk is rotatably mounted with the end of the insulating cylinder and can be squeezed into contact with the exposed end of the metal wire core, and the stop block is inserted into a groove on the inner wall of the copper tube so that the sliding column cannot rotate. In the process of the insulating inner column being screwed into the insulating outer column, an expansion ring fixed on the sliding column axially pushes one end of the pin to the outside of the insulating outer column, and when the stop block is inserted into the bottom of the groove, the insulating outer column moves toward the outside of the copper tube to the position where the pin contacts the inner wall of the copper tube.

[0013] Furthermore, the anti-rotation block is a rectangular block structure, and forms a T-shaped structure together with the rectangular slide to which it is fixed.

[0014] Furthermore, a vertical strip through-hole is provided on the sliding column, and the strip through-hole passes through the expansion ring. An elastic cable that is always in a stretched state is provided in the strip through-hole, and the two ends of the elastic cable are respectively connected to the ends of the two oppositely arranged bayonet pins, so that the bayonet pins are always in extrusion contact with the sliding column.

[0015] Furthermore, the insulating outer column has a mounting ring portion, and one side of the mounting ring portion has a positioning protrusion, which is used to be inserted into a positioning groove located on the outer wall of the copper tube. The orifice end of the plug-in hole is a countersunk structure, and the positioning groove is arranged on the side wall of the countersunk structure. When the positioning protrusion is inserted into the positioning groove, the anti-rotation block faces the groove so that it can be inserted into the groove.

[0016] Furthermore, a gland is rotatably installed at the end of the insulating outer column, and the center of the inner part of the gland is axially inserted into the end of the insulating inner column and can rotate with the insulating inner column. The cable to be tested passes through the center of the gland and extends into the insulating inner column. A limit sleeve is also provided outside the gland, which is extruded and sleeved on the cable to be tested. The position of the limit sleeve is such that when the cable to be tested is inserted into the insulating inner column, the exposed metal wire core end is within a set length range; it also includes a locking screw sleeve, one end of the locking screw sleeve hooks the edge of the gland, and the other end is threadedly sleeved on the mounting ring portion, and a spring washer is provided between the locking screw sleeve and the outer wall of the copper tube, so that when the locking nut is tightened, the insulating inner column can be axially compressed, and when it is loosened, the gland can be allowed to rotate freely.

[0017] The beneficial effects of the present invention are:

[0018] The high-voltage electric power fully insulated combined ring network cabinet improves insulation by making the cabinet body itself into an insulating structure, and divides different partitions into different areas corresponding to different installation rooms or operation rooms. These partitions are composed of insulating partitions filled with insulating oil, which can greatly improve the insulation between the partitions and avoid the influence of each other during working discharge. Moreover, the present invention provides a slot between the heat sink and the cabinet body for plug-in installation, which not only allows for rapid installation of partitions (rooms) and improves insulation, but also further cleverly utilizes insulating oil for heat transfer. Driven by a special heat dissipation system, it fully prevents the internal temperature of the ring network cabinet from rising, maintains normal operating temperature, avoids the problem of reduced insulation due to aging of insulating materials and devices due to temperature rise, and comprehensively improves insulation. Moreover, when necessary, ventilation can be carried out in time to extract the internal hot and humid air in time.

[0019] In addition, the present invention also provides a connector that can be quickly installed when the copper tube is used as a busbar. During installation, this connector can provide insulation protection because the outer surface of the copper tube has an insulating coating, and the conductive connection part with the busbar is mainly concentrated on the inner wall of the copper tube. This greatly improves the installation connection and the safety insulation during operation. The electrical connection is made in a multi-point contact manner on the inner wall of the copper tube, greatly improving the reliability of the connection.

[0020] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional view of one embodiment of the present invention;

[0022] Figure 2 for Figure 1 A magnified view of the structure at position I in the middle;

[0023] Figure 3 A schematic diagram of a partial structure of the insulating busbar of the present invention;

[0024] Figure 4 It is a partial structural schematic diagram of the plug hole provided on the copper tube of the present invention;

[0025] Figure 5 for Figure 4 A top view of the plug hole in;

[0026] Figure 6 This is a schematic structural diagram of a connector installed on a copper pipe in the present invention;

[0027] Figure 7 for Figure 6 Bottom view of the T-shaped structure formed by the anti-rotation block and the rectangular slide;

[0028] Figure 8 It is a partial side view of the sliding column;

[0029] Figure 9 for Figure 8 A partial cross-sectional view of the structure shown when cut through a strip-shaped perforation;

[0030] Figure 10 This is a schematic diagram of the position of the sliding column relative to the pin at the beginning of installation.

[0031] In the figure: copper tube 1, plug hole 101, countersunk structure 10101, positioning groove 1010101, groove 102, speed-regulating cooling fan 2, ventilation duct 3, cooling fins 4, air inlet 5, filter cover 6, insulating partition 7, busbar chamber 8, incoming line chamber 9, outgoing line chamber 10, operating mechanism chamber 11, fastening bolts 12, cabinet 13, heat sink 14, insulating oil 15, insulating outer column 16, mounting ring 1601, positioning protrusion 160101, insulating inner column 17, cable to be connected 18, metal wire core 1801, sliding column 19, rectangular slide 20, extrusion disk 21, anti-rotation block 22, bayonet 23, expansion ring 24, elastic cable 25, pressure cover 26, limiting sleeve 27, locking screw sleeve 28, spring washer 29, strip through hole 30. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] See also Figure 1The present invention provides a technical solution: a high-voltage electric power fully insulated combined ring network cabinet, the main structure of which includes a cabinet body 13, a busbar and a heat dissipation system, wherein the cabinet body 13 is Figure 1 As shown in the rectangular frame structure, an anti-corrosion layer is provided on the surface of the cabinet 13, and the exterior of the entire cabinet 13 is wrapped with insulating material as a whole to achieve insulation. At the same time, in this embodiment, the interior of the cabinet 13 is separately divided into an incoming line chamber 9, an outgoing line chamber 10, a busbar chamber 8, and an operating mechanism chamber 11. Each chamber is separated by an insulating partition 7. The insulating partition 7 is a hollow structure filled with insulating oil 15 to achieve insulation between the chambers. Specifically, the frame structure composed of all insulating partitions 7 contains each chamber, that is, these insulating partitions 7 are connected to each other as a whole, and the surface of the insulating partition 7 in contact with the inner wall of the cabinet 13, as shown in FIG. Figure 2 As shown, the cabinet 13 also has a plurality of spaced heat sinks 14 arranged in an integrated manner. The heat sinks 14 are rectangular plates. At the same time, a plurality of spaced slots are provided on the inner wall of the cabinet 13. The slots are rectangular grooves. The heat sinks 14 are inserted into the slots one by one to achieve the installation and positioning of each chamber in the cabinet 13. Based on the heat conduction effect of the insulating oil 15, heat can also be transferred to the cabinet 13 through the heat sink 14, thereby achieving heat dissipation. In addition, in this embodiment, the busbar includes a copper tube 1 with a nano-ceramic insulating coating on the outside to achieve insulation of the outer surface of the copper tube 1, and connectors are installed in the copper tube 1 in a pluggable manner. These connectors are connected to external cables to achieve conductive connection with the copper tube 1, thereby meeting the corresponding power supply requirements. As a specific implementation structure, the heat dissipation system includes a speed-controlled heat dissipation fan 2 provided on the top of the cabinet 13, and a temperature sensor (not shown in the figure) installed in the cabinet 13. The speed-controlled heat dissipation fan 2 accelerates as the detection value of the temperature sensor increases, thereby achieving automatic accelerated heat dissipation. More specifically, an air inlet 5 is provided at the bottom of the cabinet 13, and a filter cover 6 is installed at the air inlet 5 to filter the air entering the cabinet 13, and a plurality of heat dissipation fins 4 are provided on the side of the cabinet 13 to accelerate the outward heat dissipation of the entire cabinet 13, ensure the relative stability of the internal operating temperature, avoid aging of internal components due to high temperature, and thus avoid damage to insulation.

[0036] In this embodiment, in order to facilitate cleaning and maintenance, Figure 1 As shown, the heat dissipation fins 4 are tilted downward to clean the dust accumulated on their surface to avoid affecting the heat dissipation. In addition, heat dissipation fins 4 are provided on the inner and outer walls of the cabinet 13, and no heat dissipation fins 4 are provided on the inner wall of the cabinet 13 opposite to the insulating partition 7 to avoid accidentally touching the heat dissipation fins 4 during operation, which would cause inconvenience in operation. Figure 1As shown, fastening bolts 12 are provided at solid parts on the insulating partition 7. These solid parts can be the intersections of several insulating partitions 7. The fastening bolts 12 are threadedly fitted through the insulating partition 7 and are fastened to the back of the cabinet 13. When the heat sink 14 is inserted into the slot and the positioning is completed, the functional partition formed by the frame structure composed of the above-mentioned insulating partitions 7 can be detachably fixed in the cabinet 13.

[0037] Specifically, if Figure 1 As shown, the busbar compartment 8 is located at the bottom of the cabinet 13, while the incoming and outgoing cable compartments 9 and 10 are located on the left and right sides above the busbar compartment 8, respectively. The operating room is located above the outgoing cable compartment 10, facilitating routine installation and maintenance. Furthermore, a horizontal ventilation duct 3 is fixed to the top of the inner side of the cabinet 13. The ventilation duct 3 is provided with several air inlet holes. The center of the ventilation duct 3 is connected to a speed-controlled cooling fan 2. When the speed-controlled cooling fan 2 is activated, the hot air in the cabinet 13 is drawn out through the ventilation duct 3, achieving the purpose of timely cooling and heat dissipation.

[0038] As another key design of this embodiment, the copper tube 1 as the busbar is arranged along its length. Figure 4-Figure 5 As shown, a plurality of spaced-apart insertion holes 101 are specially provided, and connectors are inserted into these insertion holes 101. The connector comprises an insulating outer column 16 and an insulating inner column 17, as well as a conductive sliding column 19, and a plurality of bayonet pins 23 radially slidably mounted on the insulating outer tube. All bayonet pins 23 are also conductive. Specifically, as Figure 3 and Figure 6 As shown, one end of the insulating outer post 16 is axially inserted into the insertion hole 101, while the other end is axially threaded with the insulating inner post 17. That is, the insulating material is screwed into the insulating outer post 16 in a threaded manner. A cable 18 to be connected is installed in the insulating inner post 17, with one end of the metal wire core 1801 exposed. This metal wire 18 to be connected will contact the inner wall of the copper tube 1 through a series of structures described below, thereby conducting electricity. Specifically, in the production process, the sliding post 19 is capable of conducting electricity and specifically includes two rectangular slides 20 arranged at its ends. The rectangular slides 20 slide axially in the rectangular hole in the insulating outer post 16 without rotating. In addition, a squeeze disk 21 and a stop block 22 are respectively fixed at the center of the end faces of the two rectangular slides 20. The squeeze disk 21 is rotatably mounted with the end of the insulating tube and can be pressed into contact with the exposed end of the metal wire core 1801. That is, the squeeze disk 21 and the metal wire core 1801 are pressed into contact and electrically connected. In addition, the anti-rotation block 22 mentioned above can be inserted into a groove 102 on the inner wall of the copper tube 1 when it is installed in place, so that the sliding column 19 cannot rotate, and when the insulating inner column 17 is screwed into the insulating outer column 16, the sliding column 19 can be rotated. Figure 6 and Figure 8As shown, an expansion ring 24 fixed on the slide post 19 pushes one end of the bayonet 23 axially to the outside of the insulating outer post 16, and when the stop block 22 is inserted into the bottom of the groove 102, the insulating inner post 17 rotates in place due to the thread rotation effect, causing the insulating outer post 16 to move toward the outside of the copper tube 1 until it is as shown in FIG. Figure 6 and 9 The position shown in the figure where the bayonet 23 contacts the inner wall of the copper tube 1, the anti-rotation block 22 is firmly pressed in the groove 102, and the side walls of all the bayonet 23 are in squeeze contact with the inner wall of the copper tube 1, axially fixing the insulating outer column 16, that is, at this time the insulating outer column 16, the insulating inner column 17, the sliding column 19 and its auxiliary components are all fixed on the copper tube 1.

[0039] In this embodiment, Figure 6 and Figure 7 As shown, the anti-rotation block 22 is a rectangular block structure, which forms a T-shaped structure together with the rectangular slide 20 fixed thereto. Figures 8-10 The slide post 19 is provided with a vertical strip through-hole 30, which passes through the expansion ring 24. An elastic cable 25 which is always in a stretched state is provided in the strip through-hole 30. The two ends of the elastic cable 25 are respectively connected to the ends of two oppositely arranged bayonet pins 23, so that the bayonet pins 23 are always in press contact with the slide post 19. For example, when the connector is installed in the plug hole 101 of the copper tube 1, Figure 6 、 Figure 9 As shown, the expansion ring 24 contacts the bayonet pin 23, and at the beginning of installation, as shown in FIG. Figure 10 As shown, the expansion ring 24 is located above the bayonet 23. At this time, the bayonet 23 is in contact with the side wall of the sliding column 19 at the lower part of the expansion ring 24, and the bayonet 23 is completely retracted into the insulating outer column 16 to avoid affecting the plug-in installation of the insulating outer column 16 in the plug hole 101.

[0040] In this embodiment, Figure 6 As shown, the insulating outer column 16 has an annular mounting ring portion 1601, and one side of the mounting ring portion 1601 has a positioning protrusion 160101. The positioning protrusion 160101 is used to be inserted into a positioning groove 1010101 located on the outer wall of the copper tube 1 to limit the posture of the insulating outer column 16 when inserted into the copper tube 1. The posture must enable the anti-rotation block 22 in the insulating outer column 16 to be inserted into the above-mentioned groove 102. When making it specifically, as shown in FIG. Figure 4-Figure 5 As shown, the hole end of the plug-in hole 101 is a countersunk structure 10101, and the positioning groove 1010101 is set on the side wall of the countersunk structure 10101. When the positioning protrusion 160101 is inserted into the positioning groove 1010101, the stop block 22 faces the groove 102 so that it can be inserted into the groove 102 to achieve quick installation and connection.

[0041] In this embodiment, Figure 3 and Figure 6 As shown, a pressure cap 26 is rotatably installed at the end of the insulating outer column 16. The bottom edge of the pressure cap 26 extends horizontally. There is a boss in the center of the inner part of the pressure cap 26. The boss can be a rectangular structure. The boss is axially inserted into the end of the insulating inner column 17 and can thereby rotate the insulating inner column 17. That is, by rotating the pressure cap 26, the insulating inner column 17 can rotate. During installation, the cable to be tested can be passed through the center of the gland 26 and then extended into the insulating inner column 17. A limit sleeve 27 is provided outside the gland 26 and is squeezed onto the cable to be tested. This limit sleeve 27 is relatively tightly sleeved on the insulating rubber of the cable to be connected 18. The position of the limit sleeve 27 on the cable to be connected is moved axially so that when the cable to be tested is inserted into the insulating inner column 17, the exposed end of the metal wire core 1801 is within the set length range, that is, when the limit sleeve 27 contacts the top surface of the gland 26, the metal wire core 1801 is exposed at a predetermined length in the end of the insulating inner column 17 so as to be squeezed into contact with the above-mentioned squeezing disk 21. In order to facilitate the fixing of the gland 26, that is, to axially reinforce the insulating inner column 17, as shown Figure 3 、 Figure 6 As shown, in the present embodiment, a locking nut 28 is also included. This locking nut 28 is an annular cover structure. One end of the locking nut 28 is hooked around the edge of the gland 26, and the other end is threadedly sleeved on the mounting ring portion 1601. When the locking nut 28 is tightened, the gland 26 can be pulled downward to achieve its fixed installation. When the gland 26 is loosened, the gland 26 is released and can rotate freely. In order to improve the installation tightness of the locking nut 28, a spring washer 29 is also provided between the locking nut 28 and the outer wall of the copper tube 1. When the locking nut is tightened, the insulating inner column 17 can be axially compressed. When the gland 26 is loosened, the gland 26 can be allowed to rotate freely. Because the locking nut 28 only needs to be slightly rotated during use, that is, the gland 26 can be released by slightly loosening. Therefore, the spring washer 29 is provided to apply an axial elastic force to pre-tighten the locking nut 28 and improve the stability and reliability of the structure.

[0042] When the connector in the above embodiment is installed and used, the cable 18 to be connected is inserted into the insulating inner column 17 through the limiting sleeve 27 and the gland 26. Figure 6As shown, a section of the metal wire core 1801 of the cable 18 to be connected is exposed to a predetermined length and is located in the insulating inner column 17. Then, the insulating inner column 17 is screwed into the insulating outer column 16 inserted into the plug hole 101 of the copper tube 1. Specifically, the screwing-in can be achieved by rotating the pressure cap 26. During this period, the above-mentioned section of the metal wire core 1801 will be squeezed and contacted with the extrusion disk 21 and flattened to achieve electrical connection. The sliding column 19 moves axially downward in the insulating outer column 16, and when it moves down to a certain distance, one end of the bayonet 23 located in the copper tube 1 is pushed out of the insulating outer column 16. As the insulating inner column 17 continues to be screwed in, the end of the above-mentioned metal wire core 1801 is fully squeezed and connected to the extrusion disk 21. At this time, the above-mentioned The stop block 22 is also inserted to the bottom in the corresponding groove 102. When the insulating inner column 17 continues to be rotated, the insulating inner column 17 cannot continue to move axially downward, but rotates in place, which will cause the insulating outer column 16 that is threadedly matched with it to move upward, that is, move toward the outside of the copper tube 1, and then move upward with the pin 23 that has extended out of the insulating outer column 16, so that the side of the pin 23 is squeezed into contact with the inside of the copper tube 1. The entire connector is stuck in the plug hole 101 to achieve fixed installation. The cable to be tested is in contact with the inner wall of the copper tube 1 through the stop block 22, and all the pins 23 are in contact with the inner wall of the copper tube 1, to achieve multi-point electrical connection. The connection and installation are not only simple and fast, but also the multi-point electrical connection is more reliable.

[0043] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0044] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high-voltage electric power fully insulated combined ring network cabinet, comprising a cabinet body (13), a busbar and a heat dissipation system, characterized in that: The cabinet (13) is a frame structure, the surface of which is provided with an anti-corrosion layer, and the exterior of the cabinet (13) is entirely wrapped with insulating material; the interior of the cabinet (13) is separately divided into an incoming line chamber (9), an outgoing line chamber (10), a busbar chamber (8) and an operating mechanism chamber (11), and each chamber is separated by an insulating partition (7), the insulating partition (7) is a hollow structure, and is filled with insulating oil (15); the frame structure composed of all insulating partitions (7) contains each chamber, and the surface of the insulating partition (7) in contact with the inner wall of the cabinet (13) is integrally provided with a plurality of spaced heat dissipation plates (14); a plurality of spaced slots are provided on the inner wall of the cabinet (13), and the heat dissipation plates (14) are inserted into the slots in a one-to-one correspondence to achieve the installation and positioning of each chamber in the cabinet (13), and heat is transferred to the cabinet (13) through the heat dissipation plates (14) to dissipate heat; The busbar comprises a copper tube (1) with a nano-ceramic insulating coating on the outside, a connector being installed in the copper tube (1) in a pluggable manner, and the connector being connected to an external cable to achieve an electrically conductive connection with the copper tube (1); The heat dissipation system comprises a speed-regulating heat dissipation fan (2) provided on the top of a cabinet (13) and a temperature sensor installed in the cabinet (13), wherein the speed-regulating heat dissipation fan (2) rotates faster as the detection value of the temperature sensor increases; an air inlet (5) and a filter screen (6) connected to the air inlet (5) are provided at the bottom of the cabinet (13), and a plurality of heat dissipation fins (4) arranged at intervals are provided on the side of the cabinet (13).

2. The high-voltage electric power fully insulated combined ring main unit according to claim 1, characterized in that: The heat dissipation fins (4) are arranged to be tilted downward, and heat dissipation fins (4) are provided on both the inner and outer walls of the cabinet (13), while no heat dissipation fins (4) are provided on the inner wall of the cabinet (13) opposite to the insulating partition (7).

3. The high-voltage electric power fully insulated combined ring main unit according to claim 1, characterized in that: A fastening bolt (12) is provided on the solid portion of the insulating partition (7). The fastening bolt (12) is threadedly passed through the insulating partition (7) and fastened to the back of the cabinet (13). After the heat dissipation plate (14) is inserted into the slot, the frame structure formed by the insulating partition (7) can be detachably fixed.

4. The high-voltage electric power fully insulated combined ring main unit according to claim 3, characterized in that: The busbar chamber (8) is located at the bottom of the cabinet (13), the incoming line chamber (9) and the outgoing line chamber (10) are respectively located on the left and right sides above the busbar chamber (8), and the operating room is located above the outgoing line chamber (10).

5. The high-voltage electric power fully insulated combined ring main unit according to claim 1, characterized in that: A transversely arranged ventilation duct (3) is fixed to the top of the inner side of the cabinet (13), and a plurality of air inlet holes are provided on the ventilation duct (3). The center of the ventilation duct (3) is connected to the speed-regulating cooling fan (2).

6. The high-voltage electric power fully insulated combined ring main unit according to claim 1, characterized in that: The copper tube (1) is provided with a plurality of spaced-apart plug holes (101) along its length direction, wherein the connector is inserted into the plug holes (101), and the connector comprises an insulating outer column (16), an insulating inner column (17), a conductive sliding column (19), and a plurality of bayonet pins (23) radially slidably mounted on the insulating outer tube, wherein: One end of the insulating outer column (16) is axially inserted into the plug hole (101), and the other end thereof is axially threadedly engaged with the insulating inner column (17), and a cable (18) to be connected with one end of which the metal wire core (1801) is exposed is installed in the insulating inner column (17); the sliding column (19) includes two rectangular slides (20) arranged at both ends thereof, and an extrusion disk (21) and a stop block (22) are respectively fixed at the center of the end faces of the two rectangular slides (20), and the extrusion disk (21) is rotatably engaged with the end of the insulating cylinder and can engage with the exposed metal wire core (1801). ) end is squeezed and contacted, and the stop block (22) is inserted into a groove (102) on the inner wall of the copper tube (1) so that the slide column (19) cannot rotate. During the process of the insulating inner column (17) being screwed into the insulating outer column (16), an expansion ring (24) fixed on the slide column (19) pushes one end of the bayonet (23) axially to the outside of the insulating outer column (16), and when the stop block (22) is inserted into the bottom of the groove (102), the insulating outer column (16) moves toward the outside of the copper tube (1) to a position where the bayonet (23) contacts and contacts the inner wall of the copper tube (1).

7. The high-voltage electric power fully insulated combined ring main unit according to claim 6, characterized in that: The anti-rotation block (22) is a rectangular block structure, and forms a T-shaped structure together with the rectangular slide (20) to which it is fixed.

8. The high-voltage electric power fully insulated combined ring main unit according to claim 6, characterized in that: The slide column (19) is provided with a vertical strip through-hole (30), which passes through the expansion ring (24). An elastic cable (25) which is always in a stretched state is provided in the strip through-hole (30), and the two ends of the elastic cable (25) are respectively connected to the ends of the two oppositely arranged bayonet pins (23), so that the bayonet pins (23) are always in compression contact with the slide column (19).

9. The high-voltage electric power fully insulated combined ring main unit according to claim 6, characterized in that: The insulating outer column (16) has a mounting ring portion (1601), and a positioning protrusion (160101) is provided on one side of the mounting ring portion (1601). The positioning protrusion (160101) is used to be inserted into a positioning groove (1010101) located on the outer wall of the copper tube (1). The orifice end of the plug hole (101) is a countersunk structure (10101). The positioning groove (1010101) is provided on the side wall of the countersunk structure (10101). When the positioning protrusion (160101) is inserted into the positioning groove (1010101), the anti-rotation block (22) faces the groove (102) so as to be inserted into the groove (102).

10. The high-voltage electric power fully insulated combined ring main unit according to claim 1, characterized in that: A gland (26) is rotatably mounted on the end of the insulating outer column (16), and the center of the gland (26) is axially inserted into the end of the insulating inner column (17) and can rotate with the insulating inner column (17). The cable to be tested passes through the center of the gland (26) and then extends into the insulating inner column (17). A limiting sleeve (27) is provided outside the gland (26) and is squeezed onto the cable to be tested. The position of the limiting sleeve (27) ensures that when the cable to be tested is inserted into the insulating inner column (17), the exposed end of the metal wire core (1801) is within a set length range. The invention also includes a locking screw sleeve (28), one end of which is hooked on the edge of the gland (26), and the other end is threadedly sleeved on the mounting ring portion (1601). A spring washer (29) is also provided between the locking screw sleeve (28) and the outer wall of the copper tube (1), so that when the locking nut is tightened, the insulating inner column (17) can be axially compressed, and when it is loosened, the gland (26) can be allowed to rotate freely.

Images