A fully sealed sulfur hexafluoride ring network cabinet

Abstract

The present invention relates to the technical field of power distribution cabinets, and in particular to a fully sealed sulfur hexafluoride ring network cabinet. It includes a mounting rod, a rotating shaft I, a rotating shaft II, a magnetic coupling, a fixed rod, a planetary reducer, a connecting rod I, etc., two mounting rods are symmetrically connected to both sides of the partition, the rotating shaft I and the rotating shaft II are respectively rotatably connected to the two mounting rods, the end of the rotating shaft I and the end of the rotating shaft II are transmitted through the magnetic coupling, the fixed rod is symmetrically connected to the side of the mounting rod, the planetary reducer is installed on the fixed rod, and the end of the connecting rod I is connected to the output shaft of the operating mechanism. The present invention can not only ensure that the output shaft of the operating mechanism smoothly controls the rotation of the output shaft of the operating mechanism through the cooperation of the rotating shaft I, the rotating shaft II, the magnetic coupling, the planetary reducer, the connecting rod I and the connecting rod II, but also can achieve the effect of remote control, so that there is no need to open a hole on the partition between the circuit breaker chamber and the mechanism chamber, and ensure good sealing in the circuit breaker chamber.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution cabinets, and in particular to a fully sealed sulfur hexafluoride ring network cabinet. Background Art

[0002] Sulfur hexafluoride ring main unit is a switchgear used in medium voltage power systems. Its main feature is the use of SF6 gas as an insulating medium and arc extinguishing medium. This type of ring main unit is usually designed for AC power systems and is suitable for distribution automation and various industrial and civil cable networks.

[0003] The interior of the sulfur hexafluoride ring main unit is usually divided into four areas by partitions: the circuit breaker room, the mechanism room, the pressure relief channel and the cable room. The circuit breaker room is filled with sulfur hexafluoride gas. The electrical insulation properties of sulfur hexafluoride can maintain the insulation between electrical equipment, and can also effectively extinguish the arc quickly after the circuit breaker contacts are separated to prevent the arc from reigniting and ensure the safe disconnection of the circuit. Since the operating mechanism in the mechanism room needs to transmit power to the switchgear in the circuit breaker room to control the circuit breaker action in the circuit breaker room, a hole needs to be opened on the partition between the circuit breaker room and the mechanism room for installing the rotating shaft for transmitting power. Although a sealing ring is used at the opening of the partition to prevent the leakage of sulfur hexafluoride gas in the circuit breaker room, as the use time increases, the sealing ring will wear and age with the rotation of the rotating shaft, resulting in a decrease in the sealing effect of the sealing ring. At this time, sulfur hexafluoride gas will leak, causing the insulation performance in the circuit breaker room to decrease, increasing the risk of electrical failure. Summary of the invention

[0004] In view of this, the present invention provides a fully sealed sulfur hexafluoride ring main unit, which can overcome the shortcomings of the existing sulfur hexafluoride ring main unit that its sealing performance decreases with the increase of usage time during use, sulfur hexafluoride gas leaks, and thus increases the risk of electrical failure.

[0005] The technical scheme of the present invention is: a fully sealed sulfur hexafluoride ring network cabinet, comprising a sulfur hexafluoride ring network cabinet body, a partition in the sulfur hexafluoride ring network cabinet body divides its internal space into four areas: a circuit breaker room, a mechanism room, a pressure relief channel and a cable room, an operating mechanism is arranged in the mechanism room, a switch device is arranged in the circuit breaker room, and also comprises a mounting rod, a rotating shaft I, a rotating shaft II, a magnetic coupling, a fixed rod, a planetary reducer, a connecting rod I and a connecting rod II, two mounting rods are symmetrically connected to both sides of the partition, the rotating shaft I and the rotating shaft II are respectively rotatably connected to the two mounting rods, the end of the rotating shaft I and the end of the rotating shaft II are transmitted through the magnetic coupling, the fixed rod is symmetrically connected to the side of the mounting rod, the planetary reducer is installed on the fixed rod, the end of the connecting rod I is connected to the output shaft of the operating mechanism, and the end of the rotating shaft I and the end of the connecting rod I are transmitted through the planetary reducer, the end of the connecting rod II is connected to the input shaft of the switch device, and the end of the rotating shaft II and the end of the connecting rod II are transmitted through the planetary reducer.

[0006] In one of the embodiments, it also includes a mounting plate, a side expansion mother coupler and a connecting mechanism. The mounting plate is symmetrically connected to the inner wall of the sulfur hexafluoride ring network cabinet body, the side expansion mother coupler is installed on the mounting plate, and two annular grooves are opened on the side of the side expansion mother coupler. The connecting mechanism is used to connect the side expansion mother coupler to the sulfur hexafluoride ring network cabinet body.

[0007] In one embodiment, the connecting mechanism includes a connecting tube, a connecting pipe, an electric push rod, a pressure column, a plastic bag and a puncture assembly. The connecting tube is symmetrically connected to the side of the mounting plate, the connecting pipe is connected to the bottom surface of the connecting tube and the annular groove, the electric push rod is connected to the side of the connecting tube, the pressure column is slidably connected in the connecting tube, and the pressure column is fixedly connected to the telescopic rod of the electric push rod, the plastic bag is connected to the bottom surface of the pressure column, and the plastic bag is located directly below the pressure column, and the puncture assembly is used to puncture the plastic bag.

[0008] In one embodiment, the puncture assembly includes a puncture column, which is connected to the bottom surface of the connecting tube and is located directly below the plastic bag. The puncture column is provided with through holes at intervals, and a circular hole is provided on the bottom surface of the pressure column, which is located directly above the puncture column.

[0009] In one of the embodiments, a foldable storage bag is also included, and the foldable storage bag is connected to the interior of the sulfur hexafluoride ring network cabinet body.

[0010] In one of the embodiments, a filter plate is also included. The filter plate is connected to the body of the sulfur hexafluoride ring network cabinet, and the filter plate is located directly above the foldable storage bag.

[0011] In one embodiment, a buffer membrane is also included, and the buffer membrane is connected to the bottom surface of the filter plate.

[0012] In one of the embodiments, it also includes anti-magnetic covers, two anti-magnetic covers are symmetrically connected to the two sides of the partition, and the rotation axis I and the rotation axis II rotate and penetrate the two anti-magnetic covers respectively.

[0013] The beneficial effects are: 1. The present invention can not only ensure that the output shaft of the operating mechanism smoothly controls the rotation of the input shaft of the switch device through the cooperation of the rotating shaft I, the rotating shaft II, the magnetic coupling, the planetary reducer, the connecting rod I and the connecting rod II, but also achieve the effect of remote control, so there is no need to open a hole on the partition between the circuit breaker chamber and the mechanism chamber, thereby ensuring good sealing inside the circuit breaker chamber.

[0014] 2. The present invention can inject sealant into one of the annular grooves to further fix and install the side expansion coupler through the cooperation of the electric push rod, the pressure column, the rubber bag and the puncture column, thereby forming a double-layer seal between the side expansion coupler and the inner wall of the circuit breaker chamber to ensure good sealing in the circuit breaker chamber. When gas leakage occurs in the circuit breaker chamber, the sealant can be automatically injected into the other annular groove to form a sealing structure again, thereby preventing sulfur hexafluoride gas from continuing to leak out in time, so that workers have sufficient time to carry out subsequent disassembly, maintenance and replacement work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the internal structure of the sulfur hexafluoride ring main unit body of the present invention.

[0017] Figure 3 It is a cross-sectional view of the separator of the present invention.

[0018] Figure 4 It is a cross-sectional view of the sulfur hexafluoride ring main unit body of the present invention.

[0019] Figure 5 It is a schematic diagram of the specific structure of the connecting mechanism of the present invention.

[0020] Figure 6 It is a cross-sectional view of the connecting cylinder and the pressure column of the present invention.

[0021] Figure 7 It is a schematic diagram of the installation of the foldable storage bag and the filter plate of the present invention.

[0022] Figure 8 It is a schematic diagram of the installation of the buffer film of the present invention.

[0023] Fig. 9 It is a schematic diagram of the installation of the anti-magnetic cover of the present invention.

[0024] In the accompanying drawings: A-circuit breaker chamber, B-mechanism chamber, C-pressure relief channel, D-cable chamber, 1-sulfur hexafluoride ring network cabinet body, 2-partition, 3-operating mechanism, 4-switch device, 5-mounting rod, 6-rotating shaft I, 7-rotating shaft II, 8-magnetic coupling, 9-fixing rod, 10-planetary reducer, 11-connecting rod I, 12-connecting rod II, 13-mounting plate, 14-side expansion mother coupling, 1401-annular groove, 15-connecting cylinder, 16-connecting pipe, 17-electric push rod, 18-pressure column, 19-rubber bag, 20-puncture column, 21-through hole, 22-round hole, 23-folding storage bag, 24-filter plate, 25-buffer membrane, 26-anti-magnetic cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment: A fully sealed sulfur hexafluoride ring main unit, such as Figure 1-Figure 3As shown, it includes a sulfur hexafluoride ring network cabinet body 1, and a plurality of partitions 2 are arranged in the sulfur hexafluoride ring network cabinet body 1. The plurality of partitions 2 can divide the internal space of the sulfur hexafluoride ring network cabinet body 1 into four areas: a circuit breaker chamber A, a mechanism chamber B, a pressure relief channel C and a cable chamber D. An operating mechanism 3 is arranged in the mechanism chamber B, and a switch device 4 is arranged in the circuit breaker chamber A. It also includes a mounting rod 5, a rotating shaft I 6, a rotating shaft II 7, a magnetic coupling 8, a fixing rod 9, a planetary reducer 10, a connecting rod I 11 and a connecting rod II 12. The left and right sides of the partition 2 between the circuit breaker chamber A and the mechanism chamber B are connected A mounting rod 5 is connected, the number of mounting rods 5 is two, the rotating shaft I6 is rotatably connected to the middle of the mounting rod 5 on the right, and the rotating shaft II7 is rotatably connected to the middle of the mounting rod 5 on the left. The rotating shaft I6 and the rotating shaft II7 are close to each other through a magnetic coupling 8. The magnetic force between the magnetic couplings 8 interacts through the partition 2, so that the rotating shaft I6 can drive the rotating shaft II7 to rotate through the magnetic coupling 8. The sides of the two mounting rods 5 that are away from each other are symmetrically connected to fixed rods 9, and a planetary reducer 1 is installed between the two fixed rods 9 on the left. 0, a planetary reducer 10 is also installed between the two fixed rods 9 on the right side, and the number of planetary reducers 10 is two. The right end of the connecting rod Ⅰ11 is connected to the output shaft of the operating mechanism 3, so that the output shaft of the operating mechanism 3 can drive the connecting rod Ⅰ11 to rotate slowly, and the right end of the rotating shaft Ⅰ6 and the left end of the connecting rod Ⅰ11 are transmitted through the planetary reducer 10 on the right side. The planetary reducer 10 on the right side can transmit the power of the slowly rotating connecting rod Ⅰ11 to the rotating shaft Ⅰ6, so that the rotating shaft Ⅰ6 rotates quickly (the reverse application of the planetary reduction gear), and can reduce the rotating shaft Ⅰ6. Torque reduces the load of rotating shaft I6, and rotating shaft I6 can drive rotating shaft II7 to rotate rapidly through magnetic coupling 8, the left end of connecting rod II12 is connected to the input shaft of switch device 4, and the left end of rotating shaft II7 and the right end of connecting rod II12 are transmitted through the planetary reducer 10 on the left, the planetary reducer 10 on the left can transmit the power of rapidly rotating rotating shaft II7 to connecting rod II12, so that connecting rod II12 rotates slowly, and can increase the torque of connecting rod II12, so that connecting rod II12 has enough torque to drive the input shaft of switch device 4 to rotate normally.

[0027] When the sulfur hexafluoride ring main unit 1 is in use, if it is necessary to transmit power to the switch device 4 through the operating mechanism 3, the output shaft of the operating mechanism 3 can be directly controlled to rotate, and the output shaft of the operating mechanism 3 can drive the connecting rod Ⅰ11 to rotate slowly. Under the action of the right planetary reducer 10, the connecting rod Ⅰ11 can drive the rotating shaft Ⅰ6 to rotate quickly, and the rotating shaft Ⅰ6 can drive the rotating shaft Ⅱ7 to rotate quickly through the magnetic coupling 8. Under the action of the left planetary reducer 10, the rotating shaft Ⅱ7 can drive the connecting rod Ⅱ12 to rotate slowly, thereby driving the input shaft of the switch device 4 to rotate slowly, so that the input shaft of the switch device 4 and the output shaft of the operating mechanism 3 can rotate at the same frequency; due to the control The rotation of the input shaft of the switch device 4 requires a large torque, so the input shaft of the switch device 4 and the output shaft of the operating mechanism 3 cannot be directly transmitted by the magnetic coupling 8, otherwise the output shaft of the operating mechanism 3 will not be able to drive the input shaft of the switch device 4 to rotate. Therefore, the present application adopts the coordination of components such as the rotating shaft I6, the rotating shaft II7, the magnetic coupling 8, the planetary reducer 10, the connecting rod I11 and the connecting rod II12, which can not only ensure that the output shaft of the operating mechanism 3 smoothly controls the rotation of the input shaft of the switch device 4, but also achieve the effect of remote control. In this way, there is no need to open a hole in the partition between the circuit breaker chamber A and the mechanism chamber B to ensure good sealing in the circuit breaker chamber A.

[0028] When installing the existing side expansion mother coupler, a hole is directly opened on the sulfur hexafluoride ring main unit, and then the side expansion mother coupler is covered on the installation hole, and sealant is applied on the outside of the side expansion mother coupler to complete the installation of the side expansion mother coupler. This installation method has poor sealing performance. When the sealant ages, the sulfur hexafluoride gas in the circuit breaker room leaks, and manual labor may not be able to disassemble, maintain and replace it in time. Therefore, a new installation method is designed as follows:

[0029] like Figure 4-Figure 6As shown, it also includes a mounting plate 13, a side expansion mother coupler 14 and a connecting mechanism. The mounting plate 13 is symmetrically connected to the upper inner wall of the circuit breaker chamber A of the sulfur hexafluoride ring network cabinet body 1. The side expansion mother coupler 14 is fixedly connected to the mounting plate 13. Two annular grooves 1401 are opened on the side of the side expansion mother coupler 14 on the front and rear sides close to the inner wall of the circuit breaker chamber A. The connecting mechanism is used to connect the side expansion mother coupler 14 with the sulfur hexafluoride ring network cabinet body 1; the connecting mechanism includes a connecting cylinder 15, a connecting pipe 16, an electric push rod 17, a pressure column 18, a plastic bag 19 and a puncture assembly. Two connecting cylinders 15 are connected to the upper part of the side of the front and rear mounting plates 13 close to each other. The connecting cylinders 15 correspond to the annular grooves 1401 one by one, and the bottom surface of the connecting cylinder 15 and the corresponding annular groove 1401 are connected. They are all connected with a connecting tube 16, the electric push rod 17 is connected to the side of the connecting tube 15, the pressure column 18 is slidably connected to the upper side of the inside of the connecting tube 15, and the pressure column 18 is fixedly connected to the telescopic rod of the electric push rod 17, the plastic bag 19 is connected to the bottom surface of the pressure column 18, and the plastic bag 19 is located at the lower side of the inside of the connecting tube 15, and the plastic bag 19 is located directly below the pressure column 18, and the puncture component is used to puncture the plastic bag 19; the puncture component includes a puncture column 20, the puncture column 20 is connected to the inner bottom surface of the connecting tube 15, and the puncture column 20 is located directly below the plastic bag 19, the puncture column 20 is also located directly above the end of the connecting tube 16, and the puncture column 20 is a hollow structure, the side of the puncture column 20 is spaced with through holes 21, and a circular hole 22 is opened in the middle of the bottom surface of the pressure column 18, and the circular hole 22 is located directly above the puncture column 20.

[0030] When sealant is manually applied to the outside of the side expansion mother coupler 14 and the side expansion mother coupler 14 is installed on the inner wall of the circuit breaker chamber A, the telescopic rod of one of the electric push rods 17 on the mounting plate 13 can be controlled to shorten, and the electric push rod 17 can drive the pressure column 18 to move downward, and the pressure column 18 can drive the glue bag 19 to move downward. When the glue bag 19 contacts the puncture column 20, the puncture column 20 can puncture the bottom of the glue bag 19, so that the sealant in the glue bag 19 can overflow. The sealant is subjected to the pressure of the pressure column 18 and flows through the through hole 21 and the connecting pipe 16 to one of the annular grooves 1401 of the side expansion mother coupler 14, thereby forming a double-layer seal between the side expansion mother coupler 14 and the inner wall of the circuit breaker chamber A, ensuring that the circuit breaker chamber A is sealed. Good sealing performance; a pressure gauge is usually provided in the circuit breaker chamber A to detect the sulfur hexafluoride gas pressure in the circuit breaker chamber A in real time. If the sealant between the side expansion mother coupler 14 and the inner wall of the circuit breaker chamber A leaks sulfur hexafluoride gas due to aging, the pressure gauge in the circuit breaker chamber A can immediately detect it and send a signal. After receiving the signal, the control cabinet configured for the sulfur hexafluoride ring network cabinet body 1 will immediately control the telescopic rod of another electric push rod 17 on the mounting plate 13 to shorten, so as to inject the sealant into another annular groove 1401 of the side expansion mother coupler 14, and form a sealing structure again, so as to prevent the sulfur hexafluoride gas from continuing to leak out in time, so that the workers have sufficient time to carry out subsequent disassembly, maintenance and replacement work.

[0031] like Figure 7-Figure 9 As shown, it also includes a folding storage bag 23, a filter plate 24, a buffer film 25 and an anti-magnetic cover 26. The folding storage bag 23 is detachably installed on the bottom surface of the partition 2 between the circuit breaker chamber A and the pressure relief channel C. The folding storage bag 23 is located inside the pressure relief channel C. The top surface of the partition 2 between the circuit breaker chamber A and the pressure relief channel C is connected to the filter plate 24, and the filter plate 24 is located directly above the folding storage bag 23. The buffer film 25 is connected to the bottom surface of the filter plate 24. The left and right sides of the partition 2 between the circuit breaker chamber A and the mechanism chamber B are connected to anti-magnetic covers 26. The number of anti-magnetic covers 26 is two, and the anti-magnetic cover 26 covers the magnetic coupling 8, which can prevent the magnetic coupling 8 from being interfered by external factors, and the rotating shaft I6 and the rotating shaft II7 rotate through the two anti-magnetic covers 26 respectively, so as not to affect the normal rotation of the rotating shaft I6 and the rotating shaft II7.

[0032] When an electrical fault occurs inside the circuit breaker chamber A, extremely high temperature and pressure will be generated in an instant. The electric arc will heat the surrounding gas and expand rapidly to produce high-pressure gas. The high-pressure gas can be discharged through the pressure relief channel C. However, the sulfur hexafluoride gas will be decomposed into toxic gases when heated by the electric arc, and these toxic gases will be discharged through the pressure relief channel C, which is less safe. When the present application is in use, the high-pressure gas will first break through the buffer membrane 25, and then the high-pressure gas can enter the folding storage bag 23. The folding storage bag 23 can be automatically unfolded to accommodate more high-pressure gas, which can prevent the high-pressure gas from directly diffusing in the pressure relief channel C. The buffer membrane 25 plays a buffering role to prevent the high-pressure gas from directly breaking through the folding storage bag 23. If an explosion occurs in the circuit breaker chamber A, the filter plate 24 can block debris to prevent debris from entering the folding storage bag 23 and preventing the folding storage bag 23 from being damaged by debris. Then the folding storage bag 23 is disassembled by professional staff, and the toxic gas in the folding storage bag 23 can be uniformly treated.

[0033] 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 fully sealed sulfur hexafluoride ring main unit, comprising a sulfur hexafluoride ring main unit body (1), wherein a partition (2) in the sulfur hexafluoride ring main unit body (1) divides the internal space thereof into four areas: a circuit breaker chamber (A), a mechanism chamber (B), a pressure relief channel (C) and a cable chamber (D), wherein an operating mechanism (3) is arranged in the mechanism chamber (B), and a switchgear (4) is arranged in the circuit breaker chamber (A), wherein the characteristics are as follows: It also includes a mounting rod (5), a rotating shaft I (6), a rotating shaft II (7), a magnetic coupling (8), a fixed rod (9), a planetary reducer (10), a connecting rod I (11) and a connecting rod II (12), wherein the two mounting rods (5) are symmetrically connected to the two sides of the partition (2), the rotating shaft I (6) and the rotating shaft II (7) are rotatably connected to the two mounting rods (5), the end of the rotating shaft I (6) and the end of the rotating shaft II (7) are transmitted through the magnetic coupling (8), the fixed rod (9) is symmetrically connected to the side of the mounting rod (5), and the planetary reducer (10) is installed on the fixed rod (9). The end of the connecting rod I (11) is connected to the output shaft of the operating mechanism (3), and the end of the rotating shaft I (6) and the end of the connecting rod I (11) are transmitted through a planetary reducer (10), the end of the connecting rod II (12) is connected to the input shaft of the switch device (4), and the end of the rotating shaft II (7) and the end of the connecting rod II (12) are transmitted through a planetary reducer (10); and the device also includes a mounting plate (13), a side expansion mother coupler (14) and a connecting mechanism, wherein the mounting plate (13) is symmetrically connected to the inner wall of the sulfur hexafluoride ring network cabinet body (1), and the side expansion mother coupler (14) is installed on the mounting plate (13). ), two annular grooves (1401) are formed on the side of the side expansion mother coupler (14), and a connecting mechanism is used to connect the side expansion mother coupler (14) to the sulfur hexafluoride ring network cabinet body (1); the connecting mechanism includes a connecting tube (15), a connecting pipe (16), an electric push rod (17), a pressure column (18), a plastic bag (19) and a puncture assembly, the connecting tube (15) is symmetrically connected to the side of the mounting plate (13), the connecting pipe (16) is connected to the bottom surface of the connecting tube (15) and the annular groove (1401), the electric push rod (17) is connected to the side of the connecting tube (15), and the pressure column (18) is slidably connected to the connecting tube (15), and the pressure column (18) is fixedly connected to the telescopic rod of the electric push rod (17), the plastic bag (19) is connected to the bottom surface of the pressure column (18), and the plastic bag (19) is located directly below the pressure column (18), and the puncture component is used to puncture the plastic bag (19); the puncture component includes a puncture column (20), the puncture column (20) is connected to the bottom surface of the connection tube (15), and the puncture column (20) is located directly below the plastic bag (19), the puncture column (20) is spaced with through holes (21), and the bottom surface of the pressure column (18) is opened with a circular hole (22), and the circular hole (22) is located directly above the puncture column (20).

2. A fully sealed sulfur hexafluoride ring main unit as claimed in claim 1, characterized in that: It also includes a foldable storage bag (23), which is connected to the interior of the sulfur hexafluoride ring network cabinet body (1).

3. A fully sealed sulfur hexafluoride ring main unit as claimed in claim 2, characterized in that: It also includes a filter plate (24), which is connected to the sulfur hexafluoride ring network cabinet body (1), and the filter plate (24) is located directly above the foldable storage bag (23).

4. A fully sealed sulfur hexafluoride ring main unit as claimed in claim 3, characterized in that: It also includes a buffer membrane (25), which is connected to the bottom surface of the filter plate (24).

5. A fully sealed sulfur hexafluoride ring main unit as claimed in claim 4, characterized in that: It also includes anti-magnetic covers (26), wherein the two anti-magnetic covers (26) are symmetrically connected to the two sides of the partition (2), and the rotating shaft I (6) and the rotating shaft II (7) rotate and penetrate the two anti-magnetic covers (26) respectively.

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