Ring main unit and installation process thereof

Abstract

The invention relates to the technical field of ring main units, in particular to a ring main unit and an installation technology thereof.The ring main unit comprises a cabinet body and a plurality of connecting pieces, the cabinet body is provided with an installation cavity, the connecting pieces are connected to the inner wall of the installation cavity at intervals, the connecting pieces are used for electrical element installation, and passivation faces are arranged in the circumferential direction of the connecting pieces and are in an arc shape. Through the arrangement of the connecting pieces and the passivation surfaces, the insulation performance of each electrical element in the same insulation distance is improved, so that the operation safety and stability of the ring main unit and the installation convenience are improved.

Description

Technical Field

[0001] This application relates to the field of ring main unit technology, and particularly relates to a ring main unit and its installation process. Background Art

[0002] A ring main unit is a set of power transmission and distribution electrical equipment installed in a metal or non-metal insulated cabinet or an electrical equipment that forms a prefabricated sectionalized ring main unit for power supply.

[0003] In view of the insufficient floor area of some outdoor ring main units in special environments, after compressing the space size of the ring main unit, it is necessary to improve the installation process of the ring main unit to improve the operating safety, stability and installation convenience of the ring main unit.

[0004] The current solutions usually adopt methods such as adding insulating sheaths and using heat shrinkable tubes to cover the primary connection parts. Although these methods can meet the requirements in the short term, as the operation time increases, the aging of insulating components is likely to cause uncertainties in the safety of power use and maintenance. Summary of the Invention

[0005] In order to improve the problem of the use safety of the ring main unit, this application provides a ring main unit and its installation process.

[0006] In a first aspect, a ring main unit provided by this application adopts the following technical solution: A ring main unit includes a cabinet body and a plurality of connectors. The cabinet body has an installation cavity, and the plurality of connectors are spaced and connected to the inner wall of the installation cavity. The connectors are for installing electrical components, and a passivation surface is provided circumferentially on the connectors, and the passivation surface is arc-shaped.

[0007] By adopting the above technical solution, the passivation surfaces are provided circumferentially on the connectors, and the passivation surfaces are arc-shaped, reducing the possibility of tip discharge of the connectors, achieving an increase in the insulation performance of electrical components within the same insulation distance, thereby improving the operating safety, stability and installation convenience of the ring main unit.

[0008] Optionally, a plurality of ports are spaced and connected to the inner wall of the installation cavity, and countersunk head screws are threadedly connected to the surfaces of the ports. The countersunk head screws can tighten and fix the wires on the surfaces of the ports to form a limit.

[0009] By adopting the above technical solution, the countersunk head screws tighten and fix the wires on the surfaces of the ports to form a limit, realizing the limit of the wires at the ports; at the same time, the outer side surface of the countersunk head screw has no edges and corners and is a circumferential surface, further avoiding the possibility of skin effect and tip discharge, thereby improving the operating safety, stability and installation convenience of the ring main unit.

[0010] Optionally, a plurality of round copper bars are spaced and connected to the inner wall of the installation cavity, and the round copper bars are for wire connection.

[0011] By adopting the above technical solution, the circular copper rod replaces the rectangular copper busbar, and the cross-sectional area of the circular copper rod is equal to that of the rectangular copper busbar, reducing the possibility of tip discharge, reducing the drawback of insufficient safety distance caused by the compressed space problem in the ring main unit, and improving the insulation stability and safety among various components during the operation of the ring main unit.

[0012] Optionally, the cabinet body is connected with a heat dissipation device. The heat dissipation device includes a spray gun. A heat dissipation flow channel for water to flow is provided in the cabinet body. The spray gun is connected to the outer wall of the cabinet body. The water inlet end of the spray gun communicates with the heat dissipation flow channel, and the water outlet end of the spray gun faces the outer wall of the cabinet body.

[0013] By adopting the above technical solution, when the electrical components in the installation cavity generate heat during operation, heat exchange occurs between the electrical components and the inner wall of the installation cavity, making it difficult for the electrical components to be damaged due to running at a high temperature for a long time, thereby extending the service life of the ring main unit. When the inner wall of the installation cavity heats up, heat exchange occurs between the inner wall of the heat dissipation flow channel and water to cool the cabinet body. At the same time, the water in the heat dissipation flow channel is sprayed on the outer wall of the cabinet body through the water outlet end of the spray gun, further improving the cooling efficiency of the cabinet body, making it difficult for the ring main unit to be damaged due to running at a high temperature for a long time, thereby extending the service life of the ring main unit.

[0014] Optionally, the heat dissipation device further includes a check valve I, a check valve II and a water absorption sponge. An air inlet flow channel is provided on the outer wall of the cabinet body. The air inlet flow channel communicates with the installation cavity. The check valve I and the water absorption sponge are connected to the inner wall of the air inlet flow channel at intervals. The water absorption sponge is located on the side of the check valve I away from the installation cavity. The water absorption sponge can adsorb moisture in the air. The check valve I allows the air in the air inlet flow channel to enter the installation cavity. An air outlet flow channel is provided on the top wall of the cabinet body. The air outlet flow channel communicates with the installation cavity. The check valve II is connected to the inner wall of the air outlet flow channel. The check valve II allows the air in the installation cavity to enter the air outlet flow channel.

[0015] By adopting the above technical solution, the outside air enters the air inlet flow channel. The water absorption sponge adsorbs the moisture in the air in the air inlet flow channel. The air passes through the water absorption sponge and enters the installation cavity through the check valve I. The air in the installation cavity exchanges heat with the electrical components to cool the electrical components, ensuring the dryness of the air in the installation cavity, thereby improving the operation stability of the ring main unit. At the same time, the air in the installation cavity enters the air outlet flow channel and is discharged through the check valve II, realizing the recycling of the air in the installation cavity, making it difficult for the air in the installation cavity to always remain at a high temperature, thereby improving the operation stability of the ring main unit.

[0016] Optionally, the heat dissipation device further includes a water storage component, which includes a water storage basin, a connecting column, a gear, a first rack, a second rack, and a thermo-expansion and contraction block. The water storage basin is connected to the top surface of the cabinet body. The bottom of the water storage basin can tightly abut against the top surface of the cabinet body to close the air flow channel. The inner cavity of the water storage basin is used for rainwater accumulation. The gear is rotatably connected to the side wall of the cabinet body. One end of the first rack is connected to the bottom of the water storage basin, and the other end of the first rack meshes with the gear. One end of the thermo-expansion and contraction block is connected to the side wall of the cabinet body, and the other end of the thermo-expansion and contraction block is connected to the end of the second rack. The sliding directions of the first rack and the second rack are parallel to each other. The second rack can mesh with the gear, and the first rack and the second rack are located on the same side of the gear. The connecting column is connected to the top surface of the cabinet body facing the water storage basin. The surface of the water storage basin is provided with a sliding groove for the connecting column to slide. The bottom wall of the water storage basin is provided with a drainage channel, and the drainage channel communicates with the sliding groove. The surface of the connecting column facing the drainage channel is provided with a water inlet channel, and the water inlet channel communicates with the heat dissipation channel. When the thermo-expansion and contraction block heats up and expands and drives the second rack to mesh with the gear, the gear rotates to drive the first rack to slide away from the cabinet body, the closing effect of the water storage basin on the air outlet channel disappears, and the inner cavity of the water storage basin, the drainage channel, the water inlet channel, and the heat dissipation channel are sequentially communicated.

[0017] By adopting the above technical solution, during rainfall, rainwater accumulates in the inner cavity of the water storage basin. The bottom of the water storage basin tightly abuts against the top surface of the cabinet body to close the air outlet channel, making it difficult for rainwater to enter the installation cavity through the air outlet channel, thereby ensuring the sealing stability of the installation cavity. At the same time, when the ring main unit operates to generate heat, the cabinet body transfers the heat to the thermo-expansion and contraction block. The thermo-expansion and contraction block heats up and expands and drives the second rack to slide towards the gear. The rack meshes with the gear and drives the gear to rotate, driving the first rack to slide away from the rack. One end of the rack is connected to the bottom of the water storage basin, driving the water storage basin to slide away from the cabinet body. The closing effect of the water storage basin on the air outlet channel disappears, facilitating the high-temperature air in the installation cavity to enter the air outlet channel through the check valve II and be discharged, realizing the discharge of the high-temperature air in the installation cavity. At the same time, driving the connecting column to slide on the inner wall of the sliding groove, the inner cavity of the water storage basin, the drainage channel, the water inlet channel, and the heat dissipation channel are sequentially communicated. The water in the water storage basin sequentially passes through the drainage channel and the water inlet channel and enters the heat dissipation channel. The inner wall of the heat dissipation channel exchanges heat with the water, realizing the cooling of the cabinet body. At the same time, the water in the heat dissipation channel is sprayed on the periphery of the cabinet body through a spray gun, further improving the cooling efficiency of the cabinet body, and there is no need for the user to continuously replenish water to the heat dissipation channel, thereby improving the simplicity of the user's use of the ring main unit.

[0018] Optionally, the heat dissipation device further includes a power assembly, which includes a power impeller, a power lead screw, and a power fan. The power lead screw is rotatably connected to the inner wall of the installation cavity. The power fan is threadedly connected to the outer periphery of the power lead screw. The power fan can slide in the installation cavity along the axis of the power lead screw, and the air outlet end of the power fan faces the electrical components in the installation cavity. The end of the power lead screw penetrates through the inner wall of the installation cavity and is located in the heat dissipation channel. The power impeller is coaxially connected to the end of the power lead screw located in the heat dissipation channel.

[0019] By adopting the above technical solution, when the water in the heat dissipation channel enters the inner cavity of the spray gun and is ejected from the water outlet end of the spray gun, the water in the heat dissipation channel impacts the blades of the power fan, driving the power impeller to rotate, driving the power lead screw to rotate around its own axis, driving the power fan to slide along the axis of the power lead screw on the inner wall of the installation cavity. The air outlet end of the power fan evenly impacts the electrical components in the installation cavity. The electrical components are in full contact with the air, and heat exchange occurs between the electrical components and the air, so that the electrical components are not easily damaged due to running at a high temperature for a long time, thereby extending the service life of the ring main unit. At the same time, there is no need for an external power device to drive the power lead screw to rotate, reducing energy consumption, thus reflecting the concept of energy conservation.

[0020] Optionally, there is a filter screen in front of the inner wall of the water storage basin. The filter screen can filter impurities in the rainwater. A scraper is slidably connected to the surface of the filter screen. The scraping end of the scraper can abut against the surface of the filter screen and scrape off the impurities on the filter screen.

[0021] By adopting the above technical solution, the filter screen can filter impurities in the rainwater, so that the drainage channel is not easily blocked by impurities. At the same time, the impurities accumulate on the surface of the filter screen, driving the scraper to slide on the surface of the filter screen. The scraping end of the scraper abuts against the surface of the filter screen and scrapes off the impurities on the surface of the filter screen, thereby ensuring the stability of the filter screen for filtering rainwater.

[0022] Optionally, a transmission assembly is connected between the scraper and the water storage basin. The transmission assembly includes a transmission lead screw, a transmission float, a transmission rope, and an elastic member I. The transmission lead screw is rotatably connected to the top surface of the water storage basin. The scraper is threadedly connected to the outer periphery of the transmission lead screw. The scraper can slide on the surface of the filter screen along the axis of the transmission lead screw. A transmission groove for the transmission float to slide is provided on the inner wall of the water storage tank. One end of the transmission rope is connected to the transmission float, and the other end of the transmission rope is wound around the outer periphery of the transmission lead screw. One end of the elastic member I in the direction of its elastic force is connected to the top surface of the water storage basin, and the other end of the elastic member I in the direction of its elastic force is connected to the surface of the transmission lead screw. The elastic member I has an elastic force to drive the transmission rope to wind around the outer periphery of the transmission lead screw, and the transmission rope between the transmission lead screw and the transmission float maintains a tense trend.

[0023] By adopting the above technical solution, when the liquid level in the water storage basin rises, it drives the transmission float to slide along the inner wall of the transmission groove towards the direction close to the filter screen. The elastic force of the first elastic member drives the transmission screw rod to rotate, and the transmission rope winds around the outer periphery of the transmission screw rod. At the same time, the scraper slides on the surface of the filter screen along the axis of the transmission screw rod, and the scraper scrapes the impurities on the surface of the filter screen, realizing the directional cleaning of the impurities on the surface of the filter screen; when the liquid level in the water storage basin drops, it drives the transmission float to slide along the inner wall of the transmission groove towards the direction away from the filter screen. The elastic force of the first elastic member drives the transmission screw rod to rotate in the reverse direction, the transmission rope disengages from the transmission screw rod, and the scraper slides on the surface of the filter screen along the axis of the transmission screw rod, realizing the automatic reset of the scraper.

[0024] In a second aspect, an installation process of a ring main unit provided by the present application adopts the following technical solution: An installation process of a ring main unit for manufacturing a ring main unit includes the following steps: Connector treatment, successively performing passivation treatment on the edges of multiple connectors; Connector installation, successively and intermittently installing multiple connectors on the inner wall of the installation cavity; Component installation, successively and intermittently installing multiple ports and multiple circular copper bars on the inner wall of the installation cavity. The circular copper bars replace the rectangular copper bars, and the cross-sectional area of the circular copper bars is equal to the cross-sectional area of the original rectangular copper bars.

[0025] By adopting the above technical solution, the connectors are passivated, and the circular copper bars replace the rectangular copper bars, reducing the occurrence of skin effect and tip discharge, and improving the insulation stability and safety between various components during the operation of the ring main unit.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The setting of the connectors and the passivation surface realizes the improvement of the insulation performance of the electrical components within the same insulation distance, thereby improving the safety, stability, and installation convenience of the operation of the ring main unit; 2. The setting of the countersunk head screws further avoids the possibility of skin effect and tip discharge, thereby improving the safety, stability, and installation convenience of the operation of the ring main unit; 3. The setting of the circular copper bars reduces the disadvantages of insufficient safety distance caused by the compressed space problem of the ring main unit, and improves the insulation stability and safety between various components during the operation of the ring main unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram in the embodiment of the present application.

[0028] Figure 2 is the overall structural schematic diagram of the connectors in the embodiment of the present application.

[0029] Figure 3 It is a sectional view in an embodiment of the present application, mainly showing the heat dissipation device.

[0030] Figure 4 It is a schematic diagram of the overall structure of the port in an embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the overall structure of the circular copper rod in an embodiment of the present application.

[0032] Figure 6 It is a sectional view in an embodiment of the present application, mainly showing the check valve II.

[0033] Explanation of reference numerals: 1, cabinet body; 11, installation cavity; 12, heat dissipation flow channel; 13, intake air flow channel; 14, exhaust air flow channel; 2, connecting piece; 21, passivation surface; 3, cabinet door; 4, port; 5, countersunk head screw; 6, circular copper rod; 61, bolt hole; 7, heat dissipation device; 71, spray gun; 72, check valve I; 73, check valve II; 74, water-absorbing sponge; 75, water storage assembly; 751, water storage basin; 7511, chute; 7512, drainage flow channel; 7513, transmission groove; 752, connecting column; 7521, intake water flow channel; 753, gear; 754, rack I; 755, rack II; 756, elastic member II; 757, thermal expansion and contraction block; 76, power assembly; 761, power impeller; 762, power lead screw; 763, power fan; 8, filter screen; 9, scraper; 10, transmission assembly; 101, transmission lead screw; 102, transmission float; 103, transmission rope; 104, elastic member I. Detailed implementation manners

[0034] The following will further describe the present application in detail Figure 1-6 with reference to the attached drawings.

[0035] An embodiment of the present application discloses a ring main unit. Refer to Figure 1 , a ring main unit includes a cabinet body 1 and a plurality of connecting pieces 2, and the bottom of the cabinet body 1 can abut against the ground to form a support.

[0036] Refer to Figure 2 and Figure 3 , the cabinet body 1 has an installation cavity 11, a cabinet door 3 for closing the installation cavity 11 is rotatably connected to the surface of the cabinet body 1, the circumferential edge of the connecting piece 2 is passivated to form a passivation surface 21, the passivation surface 21 is arc-shaped, reducing the possibility of tip discharge generated by the connecting piece 2, a plurality of connecting pieces 2 are fixedly arranged on the inner wall of the installation cavity 11 at intervals, and the connecting piece 2 is for installing electrical components, so that the insulation performance of each electrical component is increased within the same insulation distance, thereby improving the safety, stability and installation convenience of the operation of the ring main unit.

[0037] Refer to Figure 3 and Figure 4, a plurality of ports 4 are installed at intervals on the inner wall of the installation cavity 11. A countersunk screw 5 is threadedly connected to the surface of the port 4. The countersunk screw 5 can tightly fix the wire on the surface of the port 4 to form a limit. The outer peripheral surface of the countersunk screw 5 has no edges and corners and is a circumferential surface, further avoiding the possibility of skin effect and tip discharge.

[0038] Refer to Figure 3 and Figure 5 , a plurality of round copper bars 6 are installed at intervals on the inner wall of the installation cavity 11. A bolt hole 61 for tightening a bolt is provided on the side wall of the round copper bar 6. The bolt can tightly fix the wire on the inner wall of the bolt hole 61 to realize the connection between the wire and the round copper bar 6.

[0039] Refer to Figure 3 and Figure 6 , the cabinet body 1 is equipped with a heat dissipation device 7. The heat dissipation device 7 can dissipate heat from the electrical components in the installation cavity 11. The heat dissipation device 7 includes a spray gun 71, a one-way valve 72, a one-way valve 73, a water-absorbing sponge 74, a water storage component 75 and a power component 76. A heat dissipation flow channel 12 for water flow is provided in the cabinet body 1. The number of the heat dissipation flow channels 12 can be one, two or more. In the embodiment of the present application, the number of the heat dissipation flow channels 12 is two. The two heat dissipation flow channels 12 are located on both sides of the width of the cabinet body 1. The number of the spray guns 71 can be one, two or more. In the embodiment of the present application, the number of the spray guns 71 is two. The two spray guns 71 are fixed on both sides of the cabinet body 1 in the width direction by bolts. The water inlet end of the spray gun 71 corresponds to and communicates with the heat dissipation flow channel 12 one by one. The water outlet end of the spray gun 71 faces the outer wall of the cabinet body 1. The water in the heat dissipation flow channel 12 can be sprayed on the outer wall of the cabinet body 1 through the spray gun 71. The cabinet body 1 exchanges heat with the water, so that the cabinet body 1 is not easily damaged due to being in a high temperature state for a long time, thereby improving the heat dissipation efficiency of the cabinet body 1.

[0040] Refer to Figure 3 and Figure 6 , an air inlet flow channel 13 is provided on the side wall of the cabinet body 1. The air inlet flow channel 13 communicates with the installation cavity 11. The one-way valve 72 and the water-absorbing sponge 74 are installed at intervals on the inner wall of the air inlet flow channel 13. The water-absorbing sponge 74 is located on the side of the one-way valve 72 away from the installation cavity 11. The water-absorbing sponge 74 can adsorb the moisture in the air. The one-way valve 72 allows the air in the air inlet flow channel 13 to enter the installation cavity 11; an air outlet flow channel 14 is provided on the top wall of the cabinet body 1. The air outlet flow channel 14 communicates with the installation cavity 11. The one-way valve 73 is installed on the inner wall of the air outlet flow channel 14. The one-way valve 73 allows the air in the installation cavity 11 to enter the air outlet flow channel 14, realizing the air flow in the installation cavity 11.

[0041] Refer to Figure 3, the water storage component 75 can supply water to the heat dissipation flow channel 12. The number of the water storage components 75 can be one, two or more. In the embodiment of the present application, the number of the water storage components 75 is two, and the water storage components 75 and the heat dissipation flow channel 12 are in one-to-one correspondence. The water storage component 75 includes a water storage basin 751, a connecting column 752, a gear 753, a first rack 754, a second rack 755, a second elastic member 756 and a thermal expansion and contraction block 757. The bottom of the water storage basin 751 abuts against the top surface of the cabinet body 1 to form a seal and enclose an air flow channel 14; rainwater is accumulated in the inner cavity of the water storage basin 751. The gear 753 is rotatably connected to the side wall of the cabinet body 1, and the axis of the gear 753 is parallel to the length direction of the cabinet body 1. The second elastic member 756 can be a compression spring or a tension spring. In the embodiment of the present application, the second elastic member 756 is a tension spring and has a certain deformation ability. One end of the second elastic member 756 in the direction of the elastic force is fixed to the side wall of the cabinet body 1, and the other end of the second elastic member 756 in the direction of the elastic force is fixed to the end of the first rack 754. The end of the first rack 754 away from the second elastic member 756 is welded and fixed to the bottom of the water storage basin 751. The first rack 754 meshes with the gear 753. The second elastic member 756 has an elastic force to drive the bottom of the water storage basin 751 to abut against the top wall of the cabinet body 1 to form a seal, so that the water storage tray is not easily displaced on the top wall of the cabinet body 1, thereby improving the connection stability between the water storage tray and the cabinet body 1.

[0042] Referring to Figure 3 , the material of the thermal expansion and contraction block 757 can be rubber or nylon. In the embodiment of the present application, the material of the thermal expansion and contraction block 757 is nylon and has a certain coefficient of thermal expansion. One end of the thermal expansion and contraction block 757 is fixed to the side wall of the cabinet body 1, and the other end of the thermal expansion and contraction block 757 is fixed to the end of the second rack 755. The second rack 755 can mesh with the gear 753. The sliding direction of the second rack 755 is parallel to the sliding direction of the first rack 754, and the second rack 755 and the first rack 754 are located on the same side of the gear 753.

[0043] Referring to Figure 3 and Figure 6 , when the thermal expansion and contraction block 757 heats up and expands, the thermal expansion and contraction block 757 drives the second rack 755 to slide in the direction close to the gear 753. The second rack 755 meshes with the gear 753 and drives the gear 753 to rotate, driving the first rack 754 to slide away from the cabinet body 1, driving the bottom of the water storage basin 751 to separate from the top of the cabinet body 1, so that the sealing effect of the water storage basin 751 on the air outlet flow channel disappears, thereby facilitating the air in the installation cavity 11 to be discharged from the air outlet flow channel through the check valve two 73.

[0044] Referring to Figure 3, the end of the connecting column 752 is fixed to the top surface of the cabinet body 1 facing the water storage basin 751. A sliding groove 7511 for the connecting column 752 to slide is provided at the bottom of the water storage basin 751. A drainage channel 7512 is provided on the bottom wall of the water storage basin 751. The drainage channel 7512 communicates with the inner cavity of the water storage basin 751 and the sliding groove 7511. A water inlet channel 7521 is provided on the surface of the connecting column 752 facing the drainage channel 7512. The water inlet channel 7521 communicates with the heat dissipation channel 12. When it expands due to heat and contracts due to cold and the temperature rises, and the water storage basin 751 is driven away from the cabinet body 1, the connecting column 752 slides along the inner wall of the sliding groove 7511. The inner cavity of the water storage basin 751, the drainage channel 7512, the water inlet channel 7521 and the heat dissipation channel 12 are communicated in sequence. The water in the water storage basin 751 passes through the drainage channel 7512, the water inlet channel 7521 and the heat dissipation channel 12 in sequence and is sprayed out from the spray gun 71, realizing the directional replenishment of the water in the heat dissipation channel 12. There is no need for the user to supply water to the inner cavity of the heat dissipation channel 12, reducing the waste of water resources, thus reflecting the concept of environmental protection.

[0045] Refer to Figure 3 , the power assembly 76 can drive the air flow in the installation cavity 11. The power assembly 76 includes a power impeller 761, a power lead screw 762 and a power fan 763. The power lead screw 762 is rotatably connected to the inner wall of the installation cavity 11. The axis of the power lead screw 762 and the axis of the gear 753 are parallel to each other. The power fan 763 is threadedly connected to the outer periphery of the power lead screw 762. The power fan 763 can slide in the installation cavity 11 along the axis of the power lead screw 762, and the air outlet end of the power fan 763 faces the electrical components in the installation cavity 11.

[0046] Refer to Figure 3 , the end of the power lead screw 762 passes through the inner wall of the installation cavity 11 and is located in the heat dissipation channel 12. The power impeller 761 is coaxially fixed to the end of the power lead screw 762 located in the heat dissipation channel 12. When the water in the heat dissipation channel 12 is sprayed on the outer wall of the cabinet body 1 through the spray gun 71, the water impacts the blades of the power impeller 761, driving the power impeller 761 to rotate around its own axis, and driving the power fan 763 to slide in the installation cavity 11 along the axis of the power lead screw 762. There is no need for an external power device to drive the power lead screw 762 to rotate, reducing the energy consumption, thus reflecting the concept of energy conservation.

[0047] Refer to Figure 3 , a filter screen 8 is installed on the inner wall of the water storage basin 751. The filter screen 8 can filter the impurities in the rainwater, making the drainage channel 7512 not easily blocked by impurities, thus ensuring the stability of the rainwater discharge in the water storage basin 751; a scraper 9 is slidably connected to the surface of the filter screen 8. The scraping end of the scraper 9 can abut against the surface of the filter screen 8 and scrape the impurities on the surface of the filter screen 8, making the filter screen 8 not easily blocked by impurities, thus ensuring the stability of the filter screen 8 for filtering rainwater.

[0048] Refer to Figure 1 andFigure 3 , a transmission assembly 10 is connected between the scraping plate 9 and the water storage basin 751. The transmission assembly 10 can drive the scraping plate 9 to slide on the surface of the filter screen 8. The transmission assembly 10 includes a transmission lead screw 101, a transmission float 102, a transmission rope 103 and a first elastic member 104. The transmission lead screw 101 is rotatably connected to the top surface of the water storage basin 751. The axis of the transmission lead screw 101 is parallel to the width direction of the cabinet body 1. The scraping plate 9 is threadedly connected to the outer periphery of the transmission lead screw 101. The scraping plate 9 can slide on the surface of the filter screen 8 along the axis of the transmission lead screw 101. A transmission groove 7513 for the transmission float 102 to slide is provided on the inner wall of the water storage tank. The sliding direction of the transmission float 102 is parallel to the height direction of the cabinet body 1. One end of the transmission rope 103 is fixed to the surface of the transmission float 102, and the other end of the transmission rope 103 is wound around the outer periphery of the transmission lead screw 101. In the embodiment of the present application, the first elastic member 104 is a disc spring and has a certain deformation ability. One end in the elastic force direction of the first elastic member 104 is fixed to the top surface of the water storage basin 751, and the other end in the elastic force direction of the first elastic member 104 is fixed to the outer periphery of the transmission lead screw 101. The first elastic member 104 has an elastic force to drive the transmission lead screw 101 to rotate. The transmission rope 103 is wound around the outer periphery of the transmission lead screw 101, and the transmission rope 103 between the transmission lead screw 101 and the transmission float 102 is in a tendency of being in a taut state.

[0049] Refer to Figure 1 and Figure 3 , when the liquid level in the water storage basin 751 rises, it drives the transmission float 102 to slide along the inner wall of the transmission groove 7513 towards the direction close to the filter screen 8. The first elastic member 104 drives the transmission lead screw 101 to rotate. The transmission rope 103 is wound around the outer periphery of the transmission lead screw 101, driving the scraping plate 9 to slide along the axis of the transmission lead screw 101. There is no need for an external power device to drive the transmission lead screw 101 to rotate, reducing energy loss, thereby reflecting the concept of energy conservation.

[0050] The implementation principle of an embodiment of a ring main unit in the present application is as follows: The circumferential edge of the connecting member 2 is subjected to passivation treatment to form a passivation surface 21. The passivation surface 21 is in an arc shape, reducing the possibility of the connecting member 2 generating tip discharge. A plurality of connecting members 2 are fixedly arranged at intervals on the inner wall of the installation cavity 11. The connecting members 2 are for installing electrical components, enabling each electrical component to increase the insulation performance within the same insulation distance, thereby improving the safety, stability and installation convenience of the operation of the ring main unit.

[0051] The embodiment of the present application also discloses an installation process of a ring main unit for manufacturing a ring main unit, including the following steps: Treatment of the connecting member 2, sequentially subjecting the edges of a plurality of connecting members 2 to passivation treatment; Installation of the connecting member 2, sequentially and at intervals installing a plurality of connecting members 2 on the inner wall of the installation cavity 11; Component installation: A plurality of ports 4 and a plurality of circular copper bars 6 are sequentially and spacedly installed on the inner wall of the installation cavity 11. The circular copper bars 6 replace the rectangular copper busbars, and the cross-sectional area of the circular copper bars 6 is equal to the cross-sectional area of the original rectangular copper busbars.

[0052] The implementation principle of the installation process of a ring main unit in an embodiment of the present application is as follows: The connecting piece 2 is passivated, and the circular copper bars 6 replace the rectangular copper busbars, reducing the occurrence of skin effect and tip discharge, and improving the insulation stability and safety between various components during the operation of the ring main unit.

[0053] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A ring main unit, characterized in that: The invention comprises a cabinet (1) and a plurality of connecting pieces (2), wherein the cabinet (1) has a mounting cavity (11), the plurality of connecting pieces (2) are connected to the inner wall of the mounting cavity (11) at intervals, the connecting pieces (2) are used to mount electrical components, and the connecting pieces (2) are provided with a passivation surface (21) in the circumferential direction, and the passivation surface (21) is in the shape of an arc.

2. A ring main unit according to claim 1, characterized in that: The inner wall of the installation cavity (11) is connected with a plurality of ports (4) at intervals, and the surface of the port (4) is threadedly connected with a countersunk screw (5), and the countersunk screw (5) can tighten and fix the electric wire on the surface of the port (4) to form a limit.

3. The ring main unit according to claim 1, characterized in that: A plurality of circular copper rods (6) are connected to the inner wall of the installation cavity (11) at intervals, and the circular copper rods (6) are connected to power lines.

4. The ring main unit according to claim 1, characterized in that: The cabinet (1) is connected to a heat dissipation device (7), the heat dissipation device (7) comprising a spray gun (71), a heat dissipation channel (12) for water flow is provided in the cabinet (1), the spray gun (71) is connected to the outer wall of the cabinet (1), the water inlet end of the spray gun (71) is connected to the heat dissipation channel (12), and the water outlet end of the spray gun (71) faces the outer wall of the cabinet (1).

5. A ring main unit according to claim 4, characterized in that: The heat dissipation device (7) further comprises a one-way valve (72), a two-way valve (73) and a water-absorbing sponge (74); an inlet air duct (13) is provided on the outer wall of the cabinet (1); the inlet air duct (13) is connected to the installation cavity (11); the one-way valve (72) and the water-absorbing sponge (74) are connected to the inner wall of the inlet air duct (13) at intervals; the water-absorbing sponge (74) is located on the side of the one-way valve (72) away from the installation cavity (11); the water-absorbing sponge (74) can absorb moisture in the air; the one-way valve (72) allows the air in the inlet air duct (13) to enter the installation cavity (11); an outlet air duct (14) is provided on the top wall of the cabinet (1); the outlet air duct (14) is connected to the installation cavity (11); the two-way valve (73) is connected to the inner wall of the outlet air duct (14); the two-way valve (73) allows the air in the installation cavity (11) to enter the outlet air duct (14).

6. A ring main unit according to claim 5, characterized in that: The heat dissipation device (7) further comprises a water storage component (75), the water storage component (75) comprising a water storage basin (751), a connecting column (752), a gear (753), a rack 1 (754), a rack 2 (755) and a thermal expansion and contraction block (757), the water storage basin (751) being connected to the top surface of the cabinet (1), the bottom of the water storage basin (751) being able to press against the top surface of the cabinet (1) and to close the outlet air passage (14), the inner cavity of the water storage basin (751) being used to store rainwater, the gear (753) being rotatably connected to the cabinet The cabinet (1) has a side wall, one end of the rack (754) is connected to the bottom of the water storage basin (751), the other end of the rack (754) is meshed with the gear (753), one end of the thermal expansion and contraction block (757) is connected to the side wall of the cabinet (1), the other end of the thermal expansion and contraction block (757) is connected to the end of the rack (755), the sliding direction of the rack (754) and the sliding direction of the rack (755) are parallel to each other, the rack (755) can mesh with the gear (753), and the rack (754) The connecting column (752) and the rack (755) are located on the same side of the gear (753), the connecting column (752) is connected to the top surface of the cabinet (1) facing the water storage basin (751), the surface of the water storage basin (751) is provided with a slide groove (7511) for the connecting column (752) to slide, the bottom wall of the water storage basin (751) is provided with a drainage channel (7512), the drainage channel (7512) is connected to the slide groove (7511), and the surface of the connecting column (752) facing the drainage channel (7512) is provided with a water inlet channel (7521) ), the water inlet channel (7521) is connected to the heat dissipation channel (12), when the thermal expansion and contraction block (757) heats up and expands, and drives the second rack (755) to engage the gear (753), the gear (753) rotates to drive the first rack (754) to slide in a direction away from the cabinet (1), the sealing effect of the water storage basin (751) on the outlet channel (14) disappears, and the inner cavity of the water storage basin (751), the drainage channel (7512), the water inlet channel (7521) and the heat dissipation channel (12) are connected in sequence.

7. The ring main unit according to claim 4, characterized in that: The heat dissipation device (7) further comprises a power assembly (76), wherein the power assembly (76) comprises a power impeller (761), a power screw (762) and a power fan (763), wherein the power screw (762) is rotatably connected to the inner wall of the installation cavity (11), and the power fan (763) is threadedly connected to the outer periphery of the power screw (762), and the power fan (763) can slide in the installation cavity (11) along the axis of the power screw (762), and the air outlet end of the power fan (763) faces the electrical components in the installation cavity (11), and the end of the power screw (762) penetrates the inner wall of the installation cavity (11) and is located in the heat dissipation channel (12), and the power impeller (761) is coaxially connected to the end of the power screw (762) located in the heat dissipation channel (12).

8. The ring main unit according to claim 6, characterized in that: A filter screen (8) is provided in front of the inner wall of the water storage basin (751), and the filter screen (8) can filter impurities in rainwater. A scraper (9) is slidably connected to the surface of the filter screen (8), and the scraping end of the scraper (9) can press against the surface of the filter screen (8) and scrape impurities from the filter screen (8).

9. The ring main unit according to claim 8, characterized in that: A transmission assembly (10) is connected between the scraper (9) and the water storage basin (751), and the transmission assembly (10) comprises a transmission screw (101), a transmission float (102), a transmission rope (103) and an elastic member (104). The transmission screw (101) is rotatably connected to the top surface of the water storage basin (751), and the scraper (9) is threadedly connected to the outer periphery of the transmission screw (101). The scraper (9) can slide on the surface of the filter screen (8) along the axis of the transmission screw (101). The inner wall of the water storage tank is provided with a transmission groove (7513) for the transmission float (102) to slide. One end of the transmission rope (103) is connected to the transmission float (102), and the other end of the transmission rope (103) is wound around the outer periphery of the transmission screw (101). One end of the elastic member 1 (104) in the elastic force direction is connected to the top surface of the water storage basin (751), and the other end of the elastic member 1 (104) in the elastic force direction is connected to the surface of the transmission screw (101). The elastic member 1 (104) has an elastic force that drives the transmission rope (103) to be wound around the outer periphery of the transmission screw (101), and the transmission rope (103) between the transmission screw (101) and the transmission float (102) tends to be kept tight.

10. A ring main unit installation process, characterized in that: The method for producing a ring main unit according to any one of claims 1 to 9 comprises the following steps: Connector (2) processing, passivating the edges of multiple connectors (2) in sequence; The connecting piece (2) is installed by sequentially and spaced apart from each other on the inner wall of the installation cavity (11); The components are installed by sequentially and spaced apart on the inner wall of the installation cavity (11), wherein the round copper rods (6) replace the rectangular copper bars, and the cross-sectional area of ​​the round copper rods (6) is equal to the cross-sectional area of ​​the original rectangular copper bars.

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