A primary and secondary fusion integrated cast-in-place solid-sealed pole for ring network cabinet

Abstract

The present invention relates to the technical field of solid-sealed poles, and mainly proposes a primary-secondary fusion integrally cast solid-sealed pole for a ring network cabinet. It comprises a first shell, the first shell is provided with an integrated pole inlet and an integrated pole outlet, the first shell is provided with a vacuum arc extinguishing chamber, the first shell is provided with a vacuum three-position switch, the integrated pole inlet, the integrated pole outlet, the vacuum arc extinguishing chamber and the vacuum three-position switch are integrally cast, the integrated pole inlet is arranged as an insulating box structure, and the integrated pole inlet connection is installed by spring contact finger plug-in. The present invention integrally casts the vacuum arc extinguishing chamber, the vacuum three-position switch, and the inlet and outlet bushings, the upper side of the integrated pole inlet is connected by a spring contact finger, the integrated pole outlet is consistent with the structure of the conventional outlet bushing, and the insulation strength is ensured by solid insulating material, and the structure is more compact.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-sealed poles, and in particular to a primary-secondary fusion integrally cast solid-sealed pole for a ring network cabinet. Background Art

[0002] Ring main unit is an important equipment in the power system, mainly used in the power network to realize power distribution and control. When a part of the network fails, the ring main unit can quickly isolate the fault area to prevent the fault from expanding, while ensuring the normal power supply of other parts. With the continuous advancement of Internet of Things technology, sensor technology and signal processing technology, as well as the increasing demand for information interaction between users and power equipment, the integration of primary and secondary has become an inevitable choice for the industry. The integration of primary and secondary specifically refers to the integration of circuit breakers, load switches, disconnectors, current transformers, voltage transformers, etc. in primary equipment with intelligent controllers, protection devices, communication modules, etc. in secondary equipment to form an integrated intelligent distribution equipment, which requires switchgear to develop in a more compact, smarter, more reliable and lower-carbon direction, and the ring main unit is part of the primary equipment.

[0003] At present, gas-insulated ring main unit generally adopts solid-sealed, semi-solid-sealed or clamp-type poles, and the three-position isolating earthing switch adopts a rotary knife switch mechanism. Due to the complex mechanical structure of the above-mentioned poles and mechanisms, as well as the requirements for insulation distance, the overall compactness of the primary main circuit is insufficient. In addition, in the gas-insulated ring main unit, each functional unit usually requires an independent gas chamber, so it is difficult to reduce the size of the gas box, which is not conducive to achieving low carbonization; most voltage transformers adopt traditional electromagnetic type. Such voltage transformers are usually large in size and heavy in weight, so they occupy more space, resulting in insufficient integration of the primary and secondary, and it is difficult to improve the degree of intelligence. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a primary and secondary fused integral cast-in-place solid-sealed pole for a ring network cabinet.

[0005] The technical solution of the present invention is: a primary and secondary fused integral cast-in-place sealed pole for a ring network cabinet, comprising a first shell, the first shell is provided with an integrated pole incoming line and an integrated pole outgoing line, a vacuum arc extinguishing chamber is provided on the side of the first shell close to the integrated pole outgoing line, a vacuum three-position switch is provided on the side of the first shell close to the integrated pole incoming line, the integrated pole incoming line, the integrated pole outgoing line, the vacuum arc extinguishing chamber and the vacuum three-position switch are integrally cast, the side of the integrated pole incoming line away from the integrated pole outgoing line is provided with an insulating box structure, the integrated pole incoming line connection is installed by spring contact finger plug-in, the first shell is made of epoxy resin material, and the first shell is provided with an electronic voltage transformer.

[0006] Furthermore, the first shell is provided with an electric field shielding cover at the part of the vacuum interrupter and the moving end of the vacuum three-position switch.

[0007] Furthermore, a ceramic capacitor is provided on one side of the first shell near the integrated pole outlet, and the ceramic capacitor is provided with a capacitor shielding cover. A charge display sensor is provided on one side of the first shell near the integrated pole outlet, and the charge display sensor is electrically connected to the ceramic capacitor.

[0008] Furthermore, a second shell is fixedly connected to the lower side of the first shell, an annular shell is fixedly connected to the side of the second shell away from the first shell, a sliding plate is slidably connected inside the second shell, a spring is arranged between the sliding plate and the second shell, the first shell is provided with symmetrically distributed first channels and uniformly distributed second channels, the uniformly distributed second channels are connected to the symmetrically distributed first channels, a first collecting shell is fixedly connected to the upper side of the first shell, and the first collecting shell and the second shell are respectively connected to adjacent first channels.

[0009] Furthermore, it also includes a rotating shaft, which is rotatably connected to the annular shell through a mounting frame, the side of the rotating shaft away from the second shell is fixedly connected to a hemispherical shell that is evenly distributed circumferentially, the side of the rotating shaft close to the second shell is fixedly connected to a blade fan, and the side of the second shell close to the annular shell is provided with through holes that are evenly distributed circumferentially.

[0010] Furthermore, the sliding plate is provided with through holes evenly distributed in the circumferential direction, a sealing plug is slidably connected to the through holes of the sliding plate, a tension spring is provided between the sealing plug and the sliding plate, a first telescopic rod evenly distributed in the circumferential direction is fixedly connected to the second shell, and the telescopic end of the first telescopic rod is fixedly connected to the adjacent sealing plug.

[0011] Furthermore, the sliding plate is fixedly connected with sealing pieces which are evenly distributed in the circumferential direction, and the sealing pieces are in sealing cooperation with adjacent through holes on the sliding plate.

[0012] Furthermore, the blocking piece is made of elastic material, and is composed of a circular piece and a rectangular piece. The rectangular piece portion of the blocking piece is fixedly connected to the sliding plate, and the elastic coefficient of the circular piece portion of the blocking piece is greater than the elastic coefficient of the rectangular piece portion.

[0013] Furthermore, a second telescopic rod is fixedly connected to one side of the sliding plate close to the blade, the second shell is provided with a through hole for the second telescopic rod to pass through, the blade is provided with a limiting groove, and the second telescopic rod is limitedly matched with the limiting groove.

[0014] Furthermore, the upper side of the first collecting shell is fixedly connected with circumferentially evenly distributed fixing columns, the circumferentially evenly distributed fixing columns are commonly fixedly connected with the second collecting shell, the lower side of the second collecting shell is provided with a through hole, the lower side of the second collecting shell is fixedly connected with symmetrically distributed mounting rods, the symmetrically distributed mounting rods are commonly slidably connected with a magnetic plate, the magnetic plate is magnetically matched with the second collecting shell, and the magnetic plate is matched with the through hole seal on the second collecting shell.

[0015] The beneficial effects are as follows: the present invention integrates the vacuum interrupter, the vacuum three-position switch and the inlet and outlet bushings into an integral casting, the upper side of the integrated pole inlet is connected by a spring contact finger, the integrated pole outlet is consistent with the conventional outlet bushing structure, the insulation strength is ensured by solid insulating material, and the structure is more compact.

[0016] By integrating the electronic voltage transformer into the sealed pole, the sampling capacitor uses a ceramic capacitor with a long life and easy to cast as one piece, and the integrated pole incoming line part integrates a live display sensor to show whether the line is live, thereby improving the degree of primary and secondary integration and helping to improve the level of intelligence.

[0017] By allowing rainwater to enter the first channel and the second channel, the device can dissipate heat, and the large specific heat capacity of water is used to improve the heat dissipation effect. At the same time, a second shell is provided to collect rainwater, thereby extending the time for the device to dissipate heat using rainwater.

[0018] When the rainwater collected in the second shell is exhausted, the heat dissipation mode is switched to rotate the blade fan to utilize the wind flow in the environment for heat dissipation, thereby ensuring continuous heat dissipation of the device and avoiding excessive temperature when the device is working, which may affect the normal operation of the electrical components therein.

[0019] After a certain amount of rainwater is accumulated in the second collecting shell, the accumulated rainwater continues to flow into the second shell, thereby providing continuous impact on the blocking piece, so that the blocking piece blocks the adjacent through holes on the sliding plate to prevent rainwater from flowing out of the through holes on the sliding plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a three-dimensional structural cross-sectional view of the first shell and the second shell of the present invention;

[0022] Figure 3 It is a three-dimensional structural cross-sectional view of the first collecting shell and the second collecting shell of the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating shaft and the hemispherical shell of the present invention;

[0024] Figure 5A three-dimensional structural cross-sectional view of the first channel and the second channel of the present invention;

[0025] Figure 6 It is a three-dimensional structural cross-sectional view of the blade fan of the present invention;

[0026] Figure 7 It is a cross-sectional view of the three-dimensional structure of the second collecting shell, the mounting rod and the magnetic attraction plate of the present invention.

[0027] In the accompanying drawings: 1-first shell, 101-integrated pole inlet, 102-integrated pole outlet, 103-first channel, 104-second channel, 2-vacuum arc extinguishing chamber, 3-vacuum three-position switch, 4-electric field shielding cover, 5-ceramic capacitor, 6-capacitor shielding cover, 7-charged display sensor, 8-second shell, 9-annular shell, 10-sliding plate, 11-first collecting shell, 12-rotating shaft, 13-hemispherical shell, 14-leaf fan, 15-sealing plug, 16-first telescopic rod, 17-sealing plate, 18-second telescopic rod, 19-second collecting shell, 20-mounting rod, 21-magnetic plate. DETAILED DESCRIPTION

[0028] In summary, the invention includes but is not limited to the above embodiments. Any equivalent substitution or partial improvement made under the spirit and principle of the invention shall be deemed to be within the protection scope of the invention.

[0029] Most of the existing devices are composed of multiple parts, so that the overall device is not compact enough and has a large volume. In addition, the existing devices will generate heat when in use. The heat accumulation will cause the rubber parts inside the device to age faster, thus shortening the service life of the device.

[0030] Embodiment 1: A primary and secondary fusion integral casting type solid-sealed pole for a ring network cabinet, such as Figure 1-Figure 3 As shown, it includes a first shell 1, an integrated pole incoming line 101 and an integrated pole outgoing line 102 are arranged on the right side of the first shell 1, a vacuum arc chamber 2 is arranged on the lower side of the first shell 1, and a vacuum three-position switch 3 is arranged on the upper side of the first shell 1. The left sides of the vacuum arc chamber 2 and the vacuum three-position switch 3 are connected to the pull rod. The integrated pole incoming line 101, the integrated pole outgoing line 102, the vacuum arc chamber 2 and the vacuum three-position switch 3 are cast in an integrated manner to make the structure more compact. The upper side of the integrated pole incoming line 101 is arranged as an insulating box structure to increase the insulation margin. The integrated pole incoming line 101 is connected by a spring contact finger plug-in installation. The spring contact finger provides continuous pressure at the electrical connection through its own elasticity to ensure close contact between the two conductors and is more convenient to operate. The first shell 1 is made of epoxy resin material, thereby enhancing the hardness, corrosion resistance and electrical insulation of the shell. The first shell 1 is provided with an electronic voltage transformer.

[0031] like Figure 2 and Figure 3 As shown, the portion of the first shell 1 located on the left side of the vacuum arc chamber 2 and the vacuum three-position switch 3 is provided with an electric field shielding cover 4 to evenly connect the electric field at the connection between the soft connection, the insulating pull rod and the moving end of the arc chamber, that is, the electric field at the connection between the vacuum arc chamber 2 and the vacuum three-position switch 3 and the adjacent pull rod.

[0032] like Figure 2 and Figure 3 As shown, a ceramic capacitor 5 is arranged on the lower right side of the first shell 1. The service life of the ceramic capacitor 5 can exceed 20 years, and its accuracy can reach 0.5 measurement level. The ceramic capacitor 5 is provided with a capacitor shielding cover 6 to uniform the electric field. A charged display sensor 7 is arranged on the right side of the first shell 1. The charged display sensor 7 is electrically connected to the ceramic capacitor 5. The charged display sensor 7 adopts the principle of capacitive voltage division. The sensor selects a metal ring capacitor. The charged display sensor 7 needs to cooperate with the charged display to complete the charged display work.

[0033] like Figure 1-Figure 3 and Figure 5 As shown, the lower side of the first shell 1 is fixedly connected to the second shell 8, the lower side of the second shell 8 is fixedly connected to the annular shell 9, a sliding plate 10 is slidably connected in the second shell 8, a spring is arranged between the sliding plate 10 and the second shell 8, the spring is used to adjust the position of the sliding plate 10, so that the rainwater in the second channel 104 is located at a certain height, the first shell 1 is provided with two first channels 103 symmetrically distributed up and down and five annular second channels 104 evenly distributed, the five second channels 104 are all connected to the two first channels 103, the upper side of the first shell 1 is fixedly connected to the first collecting shell 11, the first collecting shell 11 is used to collect rainwater, the first collecting shell 11 and the second shell 8 are respectively connected to the adjacent first channels 103.

[0034] When using the device, install the device on the ring network cabinet, and then connect the two pull rods of the ring network cabinet to the vacuum three-position switch 3 and the vacuum interrupter 2 respectively. When the device is working, the current enters the vacuum three-position switch 3 from the wire in the integrated pole inlet 101. When the vacuum three-position switch 3 is in a closed state, the current enters the adjacent pull rod through the vacuum three-position switch 3, and then enters the ring network cabinet, and then enters the pull rod adjacent to the vacuum interrupter 2 from the ring network cabinet, and then enters the vacuum interrupter 2, and flows out from the wire of the integrated pole outlet 102. When the current passes through the vacuum three-position switch 3 and the left side of the vacuum interrupter 2, the generated electric field is shielded by the electric field shielding cover 4, thereby avoiding the influence of the electric field on the outside world. When maintaining the device, The vacuum three-position switch 3 is switched to the isolation state, thereby disconnecting the circuit. At this time, the arc generated by the circuit breaker is extinguished by the vacuum interrupter 2. When the current passes through the conductor of the integrated pole outlet 102, the ceramic capacitor 5 is responsible for converting the voltage signal on the high-voltage side into a form suitable for electronic circuit processing, while providing electrical isolation. The live display sensor 7 monitors the line status to ensure that maintenance work is carried out in a non-live state. At the same time, it also provides a safe environment for the normal operation of the electronic voltage transformer. When the live display sensor 7 detects the voltage, the electronic voltage transformer starts to work and converts the high-voltage signal into a measurable signal, which is then processed and converted by the back-end electronic circuit, and finally outputs a voltage signal that can be used to monitor and protect the system.

[0035] When it rains during the use of the device, rainwater falls into the first collecting shell 11, then enters the first channel 103 on the upper side, and then enters the first channel 103 on the lower side from the first channel 103 on the upper side through the five second channels 104, and finally enters the upper side of the sliding plate 10 in the second shell 8. As the water on the upper side of the sliding plate 10 gradually increases, the weight of the water also increases. The water pushes the sliding plate 10 downward by its own gravity and compresses the adjacent springs. After the rain stops and the weather turns hot, the device generates heat when working, which increases the water temperature in the first channel 103 and the second channel 104, accelerates the evaporation of the water in both, and thus takes away the heat, thereby achieving the purpose of cooling the device. As the water in the first channel 103 and the second channel 104 gradually evaporates, the weight of the water gradually decreases. At this time, the sliding plate 10 gradually moves upward under the action of the adjacent springs, so that the water in the first channel 103 and the second channel 104 remains full, so as to ensure the heat dissipation efficiency of the first channel 103 and the second channel 104.

[0036] The heat dissipation function of existing devices is mostly active heat dissipation, which consumes energy and increases production costs.

[0037] Embodiment 2: Based on embodiment 1, Figure 1-Figure 4As shown, it also includes a rotating shaft 12, which is rotatably connected to the annular shell 9 through a mounting frame, and three hemispherical shells 13 evenly distributed in the circumference are fixedly connected to the lower side of the rotating shaft 12. The hemispherical shells 13 are located outside the annular shell 9. Wind from all directions can blow the three hemispherical shells 13 to drive the rotating shaft 12 to rotate. A blade fan 14 is fixedly connected to the upper side of the rotating shaft 12. The blade fan 14 rotates to generate an upward wind flow to cool the first shell 1. Three through holes evenly distributed in the circumference are provided on the lower side of the second shell 8. The through holes are used to allow the wind flow generated by the blade fan 14 to enter the second shell 8.

[0038] like Figure 4 and Figure 6 As shown, the sliding plate 10 is provided with three through holes evenly distributed in the circumferential direction, and the through holes are used to allow the airflow generated by the blade fan 14 to pass through. A sealing plug 15 is slidably connected to the through hole of the sliding plate 10, and a tension spring is provided between the sealing plug 15 and the sliding plate 10, and the tension spring is used to make the sealing plug 15 seal the adjacent through holes on the sliding plate 10. Three first telescopic rods 16 evenly distributed in the circumferential direction are fixedly connected in the second shell 8, and the telescopic end of the first telescopic rod 16 is fixedly connected to the adjacent sealing plug 15.

[0039] like Figure 3 , Figure 4 and Figure 6 As shown, the sliding plate 10 is fixed with three circumferentially evenly distributed blocking pieces 17, and the blocking pieces 17 cooperate with the adjacent through holes on the sliding plate 10 to block the adjacent through holes on the sliding plate 10 so that only wind flow can pass through the adjacent through holes on the sliding plate 10 from bottom to top, and water flow cannot pass through from top to bottom. The blocking pieces 17 are made of elastic material, and are composed of circular pieces and rectangular pieces. The rectangular piece portion of the blocking piece 17 is fixed to the sliding plate 10, and the elastic coefficient of the circular piece portion of the blocking piece 17 is greater than the elastic coefficient of the rectangular piece portion. When the wind blows toward the blocking piece 17, the rectangular piece portion of the blocking piece 17 is deformed, and the rectangular piece portion of the blocking piece 17 faces the center of the sliding plate 10, so that when rainwater falls toward the sliding plate 10, it impacts the blocking piece 17 and closes it.

[0040] like Figure 6 As shown, a second telescopic rod 18 is fixedly connected to the lower side of the sliding plate 10, and the second shell 8 is provided with a through hole for the second telescopic rod 18 to pass through. A rectangular limiting groove is provided on the upper side of the blade 14, and the second telescopic rod 18 is limitedly matched with the limiting groove. When the telescopic end of the second telescopic rod 18 enters the limiting groove, the blade 14 is stuck and cannot rotate.

[0041] like Figure 2 , Figure 3 and Figure 7As shown, the upper side of the first collecting shell 11 is fixed with four circumferentially evenly distributed fixing columns, and the upper sides of the four fixing columns are commonly fixed with the second collecting shell 19. The lower side of the second collecting shell 19 is provided with a through hole, which is used to allow rainwater to pass through. The lower side of the second collecting shell 19 is fixed with two mounting rods 20 symmetrically distributed on the left and right, and the two mounting rods 20 are commonly slidably connected with a magnetic plate 21, and the magnetic plate 21 is magnetically matched with the second collecting shell 19. When the rainwater accumulated in the second collecting shell 19 reaches a certain level, the suction force between the magnetic plate 21 and the second collecting shell 19 cannot maintain the position of the magnetic plate 21, so that the magnetic plate 21 releases the blockage of the through hole on the second collecting shell 19, and the magnetic plate 21 is matched with the blockage of the through hole on the second collecting shell 19.

[0042] When the sliding plate 10 moves upward, the sliding plate 10 drives the three sealing plugs 15 to move upward, and the sealing plugs 15 stretch the adjacent first telescopic rods 16. When all the water in the first channel 103 and the second channel 104 evaporates, the first telescopic rod 16 and the second telescopic rod 18 are stretched to their limit lengths, and the sliding plate 10 continues to move upward, but the sealing plug 15 no longer moves with the sliding plate 10. The tension spring between the sealing plug 15 and the sliding plate 10 is gradually stretched, and at the same time, the sliding plate 10 drives the second telescopic rod 18 to move upward until it is separated from the limiting groove of the leaf fan 14. When the sliding plate 10 moves to the upper limit position, it stops moving. At this time, there is still a distance between the upper side of the second shell 8 and the sliding plate 10. The sealing plug 15 is separated from the sliding plate 10, so that the sealing plug 15 releases the blocking of the adjacent through holes on the sliding plate 10. When there is wind, the wind blows the hemispherical shell 13, the hemispherical shell 13 drives the rotating shaft 12 to rotate, the rotating shaft 12 drives the blade fan 14 to rotate, the rotation of the blade fan 14 generates wind blowing upward, the wind flows into the second shell 8 through the through holes on the second shell 8, and then blows open the adjacent blocking piece 17 through the through holes of the sliding plate 10, and then the wind flows to the upper side of the sliding plate 10, the rectangular piece portion of the blocking piece 17 is deformed, and then enters the first channel 103 on the lower side, and then enters the five second channels 104, and finally is discharged from the first channel 103 on the upper side, thereby achieving cooling of the device.

[0043] When it rains again, rainwater falls into the second collecting shell 19, and the rainwater in the second collecting shell 19 gradually increases. When the rainwater accumulates to a certain extent, the magnetic force between the magnetic plate 21 and the second collecting shell 19 cannot maintain the contact between the two. At this time, the magnetic plate 21 and the second collecting shell 19 are separated. As the distance increases, the suction force between the magnetic plate 21 and the second collecting shell 19 drops sharply, and the rainwater accumulated in the second collecting shell 19 is discharged from the through hole on the second collecting shell 19 and enters the first collecting shell 11, and then enters the second shell 8 through the two first channels 103 and the five second channels 104 and falls to the upper side of the sliding plate 10, and then scatters and flows away, and the water flow impacts the three blocking pieces 17, making the blocking pieces 17 blocks the adjacent through holes on the sliding plate 10, thereby causing the sliding plate 10 to move downward. At this time, the sealing plug 15 re-blocks the adjacent through holes on the sliding plate 10 under the action of the adjacent tension spring, and the second telescopic rod 18 contacts the leaf fan 14 again. When the leaf fan 14 rotates until its upper limit groove is aligned with the second telescopic rod 18, the second telescopic rod 18 is inserted into the limit groove of the leaf fan 14, so that the leaf fan 14 cannot rotate, thereby reducing the wear caused by the rotation of the rotating shaft 12 and extending the service life. When the rainwater in the second collecting shell 19 is drained, the magnetic suction plate 21 moves upward and resets by the suction force between the second collecting shell 19, so that the magnetic suction plate 21 re-blocks the through hole of the second collecting shell 19.

[0044] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A primary-secondary fusion-integrated cast-in-place solid-sealed pole for a ring main unit, comprising a first shell (1), the first shell (1) being provided with an integrated pole inlet line (101) and an integrated pole outlet line (102), a vacuum interrupter (2) being provided on a side of the first shell (1) close to the integrated pole outlet line (102), and a vacuum three-position switch (3) being provided on a side of the first shell (1) close to the integrated pole inlet line (101), characterized in that: The integrated pole incoming line (101), the integrated pole outgoing line (102), the vacuum interrupter (2) and the vacuum three-position switch (3) are cast in one piece; a side of the integrated pole incoming line (101) away from the integrated pole outgoing line (102) is provided as an insulating box structure; the integrated pole incoming line (101) is connected by spring contact plug-in installation; the first housing (1) is made of epoxy resin material; and the first housing (1) is provided with an electronic voltage transformer; A second shell (8) is fixedly connected to the lower side of the first shell (1); an annular shell (9) is fixedly connected to the side of the second shell (8) away from the first shell (1); a sliding plate (10) is slidably connected inside the second shell (8); a spring is arranged between the sliding plate (10) and the second shell (8); the first shell (1) is provided with symmetrically distributed first channels (103) and uniformly distributed second channels (104); the uniformly distributed second channels (104) are all connected to the symmetrically distributed first channels (103); a first collecting shell (11) is fixedly connected to the upper side of the first shell (1); the first collecting shell (11) and the second shell (8) are respectively connected to adjacent first channels (103).

2. The primary and secondary fusion integrally cast solid-sealed pole for a ring main unit according to claim 1, characterized in that: The portion of the first housing (1) located at the vacuum interrupter (2) and the moving end of the vacuum three-position switch (3) is provided with an electric field shielding cover (4).

3. The primary and secondary fusion integrally cast solid-sealed pole for a ring main unit according to claim 2, characterized in that: A ceramic capacitor (5) is arranged on one side of the first shell (1) close to the integrated pole outlet line (102), and the ceramic capacitor (5) is provided with a capacitor shielding cover (6). A charge display sensor (7) is arranged on one side of the first shell (1) close to the integrated pole outlet line (102), and the charge display sensor (7) is electrically connected to the ceramic capacitor (5).

4. The primary and secondary fusion integrally cast solid-sealed pole for a ring main unit according to claim 1, characterized in that: The invention also comprises a rotating shaft (12), the rotating shaft (12) being rotatably connected to the annular shell (9) via a mounting frame, the side of the rotating shaft (12) away from the second shell (8) being fixedly connected to a hemispherical shell (13) evenly distributed in the circumferential direction, the side of the rotating shaft (12) close to the second shell (8) being fixedly connected to a blade fan (14), and the side of the second shell (8) close to the annular shell (9) being provided with through holes evenly distributed in the circumferential direction.

5. The primary and secondary fusion integrally cast solid-sealed pole for a ring main unit according to claim 4, characterized in that: The sliding plate (10) is provided with through holes evenly distributed in the circumferential direction, a sealing plug (15) is slidably connected to the through hole of the sliding plate (10), a tension spring is provided between the sealing plug (15) and the sliding plate (10), and a first telescopic rod (16) evenly distributed in the circumferential direction is fixedly connected in the second housing (8), and the telescopic end of the first telescopic rod (16) is fixedly connected to the adjacent sealing plug (15).

6. The primary and secondary fusion integrally cast solid-sealed pole for a ring main unit according to claim 5, characterized in that: The sliding plate (10) is fixedly connected with sealing pieces (17) evenly distributed in the circumferential direction, and the sealing pieces (17) cooperate with adjacent through holes on the sliding plate (10) to seal.

7. The primary and secondary fusion integrally cast solid-sealed pole for a ring main unit according to claim 6, characterized in that: The blocking piece (17) is made of an elastic material, and is composed of a circular piece and a rectangular piece. The rectangular piece portion of the blocking piece (17) is fixedly connected to the sliding plate (10), and the elastic coefficient of the circular piece portion of the blocking piece (17) is greater than the elastic coefficient of the rectangular piece portion.

8. The primary and secondary fusion integrally cast solid-sealed pole for a ring main unit according to claim 6, characterized in that: A second telescopic rod (18) is fixedly connected to one side of the sliding plate (10) close to the blade (14); the second housing (8) is provided with a through hole for the second telescopic rod (18) to pass through; the blade (14) is provided with a limiting groove; and the second telescopic rod (18) is in limiting cooperation with the limiting groove.

9. The primary and secondary fusion integrally cast solid-sealed pole for a ring main unit according to claim 8, characterized in that: The upper side of the first collecting shell (11) is fixedly connected with circumferentially evenly distributed fixing columns, and the circumferentially evenly distributed fixing columns are commonly fixedly connected with the second collecting shell (19). The lower side of the second collecting shell (19) is provided with a through hole. The lower side of the second collecting shell (19) is fixedly connected with symmetrically distributed mounting rods (20). The symmetrically distributed mounting rods (20) are commonly slidably connected with a magnetic attraction plate (21). The magnetic attraction plate (21) is magnetically matched with the second collecting shell (19), and the magnetic attraction plate (21) is matched with the through hole on the second collecting shell (19) to block the through hole.

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