A high voltage switch housing

Abstract

The application provides a high-voltage switch shell applied to the field of high-voltage switches, and the switch shell can form an extruded sealing layer between an outlet and a sealing cover through the arrangement of a sealing ring, thereby greatly improving the sealing performance and reducing the leakage probability of insulating gas; in addition, through the arrangement of a warning hole, when gas leakage occurs, the gas can be preferentially concentrated and gathered in the place, and through the arrangement of a warning tube, when the gas leaks, the gas detection string in the warning tube is gradually displaced under the pressure of the gas, thereby triggering a signal switch and making an alarm sound, so that the staff can be timely alarmed about the insulating gas leakage, compared with the prior art, the staff can take corresponding treatment measures in a timely manner, thereby greatly reducing the safety hazards.

Description

A high-voltage switch housing Technical Field

[0001] This application relates to the field of high-voltage switches, and in particular to a high-voltage switch housing. Background Technology

[0002] Generally, the casing of a high-voltage switch is a fully enclosed, grounded metal casing, which encapsulates circuit breakers, disconnect switches, grounding switches, instrument transformers, surge arresters, busbars, connectors, and outgoing terminals, and is filled with insulating gas at a certain pressure for sealing.

[0003] The most common problem in the use of gas-insulated fully enclosed switchgear is leakage of insulating gas. After leakage, the insulation of various electrical components inside the casing is greatly reduced, resulting in significant safety hazards.

[0004] To address these issues, we have developed a high-voltage switch housing that provides excellent sealing and provides a warning in case of insulating gas leakage. Summary of the Invention

[0005] The purpose of this application is to ensure the airtightness of the housing, reduce the probability of insulating gas leakage, and provide timely warning after an insulating gas leakage, thereby reducing safety hazards. Compared with the prior art, this application provides a high-voltage switch housing, including a housing body, a grounding pin installed at the lower end of the housing body, multiple outlets connected to the outer end of the housing body, a sealing cover connected to the outlet by bolts, an alarm installed at the outer end of the housing body, closed annular grooves and open annular grooves located on the inner and outer sides of the closed annular grooves respectively, the open annular grooves and closed annular grooves are interconnected, the open annular grooves and closed annular grooves on the outlet and sealing cover correspond to each other and form a receiving annular groove, a sealing ring is placed in the receiving annular groove, and corresponding semi-circular holes are also drilled on the outlet and sealing cover, two semi-circular holes form a complete circular warning hole, and a warning tube is threaded into the circular warning hole, the warning tube is connected to the alarm signal.

[0006] By using a sealing ring, a compressed sealing layer can be formed between the outlet and the sealing cover, significantly improving the sealing performance and reducing the probability of insulation gas leakage. In addition, the warning hole allows gas to preferentially concentrate at the location of the leak. Combined with the warning tube, when a gas leak occurs, the gas detector string inside the warning tube gradually shifts under the pressure of the gas, triggering the signal switch and causing the alarm to sound. This allows for timely notification to staff regarding insulation gas leaks. Compared to existing technologies, staff can take appropriate measures in a timely manner, thus significantly reducing safety hazards.

[0007] Furthermore, the closed annular groove is annular, and the open annular groove is open annular, with the warning tube opening facing the center of the opening of the open annular groove. This allows the warning tube to communicate with the part of the closed annular groove that does not overlap with the open annular groove. At the same time, this communicating part is also the area where gas will preferentially accumulate after a leak, so that after a leak occurs, the gas can act relatively concentratedly on the warning tube, allowing the alarm to be triggered more quickly and promptly, and enabling staff to handle the situation more timely.

[0008] Furthermore, the sealing ring includes a hollow ring, two limiting hard rings fixedly connected to the inner and outer sides of the hollow ring, and a solid arc rod fixedly connected to the middle of the hollow ring. The limiting hard rings match the open ring groove, and the hollow ring corresponds to the closed ring groove, so that the sealing ring can be stably restricted between the outlet and the sealing cover, thus making it less likely to shift inside the two, resulting in a better sealing effect on the housing. A ventilation ring bladder is fixedly connected to the end of the connection between the hollow ring and the solid arc rod. The ventilation ring bladder is sleeved on the outside of the solid arc rod, and the ventilation ring bladder is interconnected with the hollow ring.

[0009] Furthermore, the solid arc rod is located at the opening of the limiting hard ring, and the diameter of the solid arc rod is smaller than the diameter of the hollow ring. This ensures that when the sealing ring is placed in the receiving ring groove, the part of the closed ring groove opposite to the solid arc rod is relatively empty. When the outlet and the sealing cover are tightened by bolts, the hollow ring is compressed, and the gas inside is transferred to the ventilation ring bladder. At this time, the ventilation ring bladder is compressed and expands and squeezes against each other, thereby filling the controlled part in the closed ring groove, making this part less likely to affect the overall sealing performance. When gas leakage occurs, when the gas gathers towards this point, it can compress the ventilation ring bladder, causing it to deform, and then pass through the ventilation ring bladder and enter the warning hole.

[0010] Furthermore, both the hollow ring and the venting ring bladder are elastic sealing structures, and the thickness of the hollow ring is 2-3 times that of the venting ring bladder. This makes the venting ring bladder more easily deformable under the same force. When gas leakage occurs, the venting ring bladder is more easily deformed to allow inert gas to pass through, while the solid arc rod is more likely to concentrate and accumulate the leaked inert gas. Both are filled with inert gas.

[0011] Furthermore, the cross-sectional area of ​​the hollow ring is larger than the cross-sectional area of ​​the space enclosed by the two open ring grooves. When the sealing ring is placed in the receiving ring groove, the inert gas inside the hollow ring is transferred to the ventilation ring bladder under the extrusion pressure, causing the ventilation ring bladder to elongate. The total elongation of the two ventilation ring bladders is greater than the distance between the two ventilation ring bladders. This effectively ensures that when the outlet and the sealing cover are fastened together, the two ventilation ring bladders will expand and press against each other, thereby filling the temporarily empty space in the closed ring groove and making the sealing performance between the two less likely to be affected.

[0012] Furthermore, the warning tube includes a tube body with its opening connected to a circular warning hole and a limiting cap threadedly sealed to the other opening of the tube body. A signal switch is installed on the inner wall of the limiting cap, which is used to control the opening and closing of the alarm. A gas detection string is provided inside the tube body, and a support plate is fixedly connected to the inner wall of the middle part of the tube body. The gas detection string moves through the support plate and is fixedly connected to the limiting cap. The support plate is used to support the gas detection string and restrict its movement path. When gas leaks, the gas pressure causes the stability of the gas detection string to be destroyed and it moves rapidly toward the limiting cap side, making it less likely to deviate significantly. This effectively ensures that the signal switch can be pressed by the trigger cylinder, triggering the alarm.

[0013] Furthermore, the gas detection string includes a rod body, multiple limiting plates fixedly connected to the end of the rod body away from the limiting cover, an actuating cylinder fixedly connected to the end of the rod body near the limiting cover, and a rod-mounted wire fixedly connected between the limiting cover and the rod body. The rod-mounted wire moves through the actuating cylinder. The outer ends of the limiting plates are fixedly bonded to the inner wall of the tube. When the leaked gas accumulates more and more, the limiting plates will be subjected to greater gas pressure. At this time, the limiting plates deform toward the limiting cover until the bonding points of multiple limiting plates are torn apart. At this time, the gas detection string loses its restraint and moves rapidly toward the limiting cover, thereby triggering the alarm.

[0014] Furthermore, the limiting plate is an elastic sealing structure, and the signal switch, the rod line, the trigger cylinder, and the rod body are coaxially arranged. The rod line is an elastic structure under tension. When the adhesion between the limiting plate and the tube body is released, the rod line will quickly recover its deformation, thereby causing the trigger cylinder to move.

[0015] Compared to existing technologies, the advantages of this application are:

[0016] By using a sealing ring, a compressed sealing layer can be formed between the outlet and the sealing cover, significantly improving the sealing performance and reducing the probability of insulation gas leakage. In addition, the warning hole allows gas to preferentially concentrate at the location of the leak. Combined with the warning tube, when a gas leak occurs, the gas detector string inside the warning tube gradually shifts under the pressure of the gas, triggering the signal switch and causing the alarm to sound. This allows for timely notification to staff regarding insulation gas leaks. Compared to existing technologies, staff can take appropriate measures in a timely manner, thus significantly reducing safety hazards. Attached Figure Description

[0017] Figure 1 is a front view of this application;

[0018] Figure 2 is a cross-sectional view of the outlet and sealing cap of this application;

[0019] Figure 3 is a schematic diagram of the outlet end face of this application;

[0020] Figure 4 is a perspective view of the sealing ring of this application;

[0021] Figure 5 is a cross-sectional view of the sealing ring of this application;

[0022] Figure 6 is a perspective view of the sealing ring of this application placed between the outlet and the sealing cap;

[0023] Figure 7 is a cross-sectional view of the warning tube of this application;

[0024] Figure 8 is a cross-sectional view of the warning tube in the early stage of leakage in this application;

[0025] Figure 9 is a schematic diagram of the alarm tube gas detector impact signal switch of this application.

[0026] Explanation of the labels in the diagram:

[0027] 1. Shell body, 2. Grounding pin, 3. Outlet, 31. Open annular groove, 32. Closed annular groove, 4. Sealing cover, 5. Warning tube, 51. Tube body, 52. Limiting cover, 61. Hollow ring, 62. Limiting hard ring, 63. Solid arc rod, 64. Ventilation ring bag, 71. Signal switch, 7. Alarm, 81. Limiting plate, 82. Rod body, 83. Rod wire, 84. Touch cylinder, 9. Support plate. Detailed Implementation

[0028] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0029] Example 1:

[0030] Please refer to Figure 1. The present invention provides a high-voltage switch housing, including a housing body 1, a grounding pin 2 installed at the lower end of the housing body 1, multiple outlet ports 3 connected to the outer end of the housing body 1, a sealing cover 4 connected to the outlet ports 3 by bolts, an alarm 7 installed at the outer end of the housing body 1, and a warning tube 5 connected to the alarm 7.

[0031] Please refer to Figure 2-3. Both the outlet 3 and the sealing cover 4 have closed annular grooves 32 and open annular grooves 31 located on the inner and outer sides of the closed annular grooves 32, respectively. The open annular grooves 31 and 32 are interconnected. The open annular grooves 31 and 32 on the outlet 3 and sealing cover 4 correspond to each other and form a receiving annular groove. A sealing ring is placed inside the receiving annular groove. Corresponding semicircular holes are also drilled on the outlet 3 and sealing cover 4. The two semicircular holes form a complete circular warning hole, and a warning tube 5 is threaded into the circular warning hole.

[0032] Please refer to Figure 3. The closed annular groove 32 is annular, and the open annular groove 31 is an open annular shape. The opening of the warning tube 5 faces the middle of the opening of the open annular groove 31, so that the warning tube 5 is connected to the part of the closed annular groove 32 that does not overlap with the open annular groove 31. At the same time, this connected part is also the part where gas will preferentially accumulate after a leak. This allows the gas to act relatively concentratedly on the warning tube 5 after a leak occurs, so that the alarm 7 can be triggered more quickly and timely, and the staff can handle it more promptly.

[0033] Please refer to Figure 4. The sealing ring includes a hollow ring 61, two limiting hard rings 62 fixedly connected to the inner and outer sides of the hollow ring 61, and a solid arc rod 63 fixedly connected to the middle of the hollow ring 61. The limiting hard rings 62 match the open ring groove 31, and the hollow ring 61 corresponds to the closed ring groove 32, so that the sealing ring can be stably restricted between the outlet 3 and the sealing cover 4, thus making it less likely to shift inside the two, resulting in a better sealing effect on the housing. The end of the connection between the hollow ring 61 and the solid arc rod 63 is fixedly connected with... The venting ring bladder 64 is sleeved outside the solid arc rod 63 and is interconnected with the hollow ring 61. Both the hollow ring 61 and the venting ring bladder 64 are elastic sealing structures, and the thickness of the hollow ring 61 is 2-3 times the thickness of the venting ring bladder 64. This makes the venting ring bladder 64 more easily deformable under the same force. When gas leakage occurs, the venting ring bladder 64 is more easily deformed to allow inert gas to pass through, and the leaked inert gas is easily concentrated at the solid arc rod 63. Both are filled with inert gas.

[0034] The solid arc rod 63 is located at the opening of the limiting hard ring 62, and the diameter of the solid arc rod 63 is smaller than the diameter of the hollow ring 61. When the sealing ring is placed in the receiving ring groove, as shown in Figure 6, the part of the closed ring groove 32 opposite to the solid arc rod 63 is relatively empty. When the outlet 3 and the sealing cover 4 are fastened by bolts, the hollow ring 61 is compressed, and the gas inside it is transferred to the ventilation ring bladder 64. At this time, the ventilation ring bladder 64 is compressed and expands and squeezes against each other, thereby filling the controlled part in the closed ring groove 32, so that this part is less likely to affect the overall sealing performance. When gas leakage occurs, when the gas gathers towards this point, it can squeeze the ventilation ring bladder 64 to deform it, and then pass through the ventilation ring bladder 64 and enter the warning hole.

[0035] As shown in Figure 5, the cross-sectional area of ​​the hollow ring 61 is larger than the cross-sectional area of ​​the space enclosed by the two open ring grooves 31. When the sealing ring is placed in the ring groove, the inert gas in the hollow ring 61 is transferred to the ventilation ring 64 under the extrusion pressure, causing the ventilation ring 64 to elongate. The total elongation of the two ventilation ring 64 is greater than the distance between the two ventilation ring 64, which effectively ensures that when the outlet 3 and the sealing cover 4 are fastened together, the two ventilation ring 64 will expand and press against each other, thereby filling the temporarily empty space in the closed ring groove 32, making the sealing performance between the two less likely to be affected.

[0036] Please refer to Figure 7. The warning tube 5 includes a tube body 51 with its opening connected to a circular warning hole and a limiting cap 52 threadedly sealed to the other opening of the tube body 51. A signal switch 71 is installed on the inner wall of the limiting cap 52. The signal switch 71 is used to control the opening and closing of the alarm 7. A gas detection string is provided inside the tube body 51. A support plate 9 is fixedly connected to the inner wall of the middle part of the tube body 51. The gas detection string moves through the support plate 9 and is fixedly connected to the limiting cap 52. The support plate 9 is used to support the gas detection string and restrict its movement path. When gas leaks, the gas pressure causes the stability of the gas detection string to be destroyed and it moves quickly toward the limiting cap 52, so that it is not easy to have a large deviation. This effectively ensures that the signal switch 71 can be pressed by the trigger cylinder 84, so that the alarm 7 is triggered.

[0037] In addition, in this design, the tube body 51 can be made of rigid material and is not required to be transparent.

[0038] Please refer to Figure 7. The gas detection string includes a rod body 82, multiple limiting plates 81 fixedly connected to the end of the rod body 82 away from the limiting cover 52, an actuating cylinder 84 fixedly connected to the end of the rod body 82 near the limiting cover 52, and a rod-mounted wire 83 fixedly connected between the limiting cover 52 and the rod body 82. The rod-mounted wire 83 movably passes through the actuating cylinder 84. The outer ends of the limiting plates 81 are fixedly bonded to the inner wall of the tube body 51, as shown in Figures 8-9. When the leaked gas accumulates more and more, the limiting plates 81 will be subjected to greater gas pressure. At this time, the limiting plates 81 deform toward the limiting cover 52 until the bonding of multiple limiting plates 81 is torn open. At this time, the gas detection string loses its restraint and moves rapidly toward the limiting cover 52, thereby triggering the alarm 7.

[0039] The limiting plate 81 is an elastic sealing structure. The signal switch 71, the rod wire 83, the trigger cylinder 84, and the rod body 82 are coaxially arranged. The rod wire 83 is an elastic structure in a tensile state. When the adhesion between the limiting plate 81 and the tube body 51 is released, the rod wire 83 will quickly recover its deformation, thereby causing the trigger cylinder 84 to move.

[0040] The gas detection string in this solution can trigger the alarm 7. Compared with the visual reminder in embodiment 3, this embodiment can provide an auditory reminder, which can warn a wider range and make the warning effect on staff better.

[0041] By setting a sealing ring, a compressed sealing layer can be formed between the outlet 3 and the sealing cover 4, thereby significantly improving the sealing performance and reducing the probability of insulation gas leakage. In addition, by setting a warning hole, in the event of a gas leak, the gas can be preferentially concentrated at that point. In conjunction with the setting of the warning tube 5, when a gas leak occurs, the gas detection string in the warning tube 5 gradually shifts under the pressure of the gas, thereby triggering the signal switch 71 and causing the alarm 7 to sound an alarm. This can promptly alert the staff about the insulation gas leak. Compared with existing technologies, staff can take appropriate measures in a timely manner, thereby significantly reducing safety hazards.

[0042] Implementation: 2:

[0043] This solution adds the following content based on Example 1:

[0044] As shown in Figures 8-9, the tube body 51 is a transparent rigid structure, and different colored powders are present in the space between two adjacent limiting plates 81. As the adhesive parts of multiple limiting plates 81 are torn apart, the different colored powders will partially mix, thus causing obvious color changes at the warning tube 5. After the alarm 7 is triggered, when the staff performs maintenance, they can determine the outlet 3 where the gas leak problem has occurred based on the changes in the phenomena on each warning tube 5, thereby greatly reducing the difficulty and workload of maintenance.

[0045] Implementation: 3:

[0046] It is worth noting that the air detection string in Examples 1 and 2 can also be directly replaced by feathers or lightweight colored threads. At the same time, if the tube 51 is a transparent rigid structure, it can continuously shake inside the tube 51 when there is a leak, thereby providing a visual reminder to the staff. This is an option, and those skilled in the art can selectively implement it as needed.

[0047] The above description is only the best implementation method adopted in this application in combination with current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A high-voltage switch housing, comprising a housing body (1), a grounding pin (2) installed at the lower end of the housing body (1), and a plurality of cable outlets (3) connected to the outer end of the housing body (1), wherein a sealing cap (4) is bolted to the outside of each cable outlet (3), characterized in that, An alarm (7) is installed on the outer end of the main body (1). The end faces of the outlet (3) and the sealing cover (4) that are close to each other are both chiseled with closed annular grooves (32) and open annular grooves (31) located on the inner and outer sides of the closed annular grooves (32). The open annular grooves (31) and closed annular grooves (32) are interconnected. The open annular grooves (31) and closed annular grooves (32) on the outlet (3) and the sealing cover (4) correspond to each other and form a receiving annular groove. A sealing ring is placed inside the receiving annular groove. The outlet ( 3) Corresponding semicircular holes are also drilled on the sealing cap (4). The two semicircular holes form a complete circular warning hole, and a warning tube (5) is threaded into the circular warning hole. The warning tube (5) is connected to the alarm (7) via a signal. The sealing ring includes a hollow ring (61), two limiting hard rings (62) fixedly connected to the inner and outer sides of the hollow ring (61), and a solid arc rod (63) fixedly connected to the middle of the hollow ring (61). The limiting hard rings (62) match the opening ring groove (31). The hollow ring (61) corresponds to the closed ring groove (32). The solid arc rod (63) is located at the opening of the limiting hard ring (62), and the diameter of the solid arc rod (63) is smaller than the diameter of the hollow ring (61). A ventilation ring bladder (64) is fixedly connected to the end of the connection between the hollow ring (61) and the solid arc rod (63). The ventilation ring bladder (64) is sleeved on the outside of the solid arc rod (63), and the ventilation ring bladder (64) is interconnected with the hollow ring (61). Both the hollow ring (61) and the ventilation ring bladder (64) are... The structure is elastically sealed, and the thickness of the hollow ring (61) is 2-3 times the thickness of the ventilation ring bladder (64), and both are filled with inert gas. The cross-sectional area of ​​the hollow ring (61) is greater than the cross-sectional area of ​​the space enclosed by the two open ring grooves (31). When the sealing ring is placed in the receiving ring groove, the inert gas in the hollow ring (61) is transferred to the ventilation ring bladder (64) under the extrusion pressure, causing the ventilation ring bladder (64) to elongate. The total elongation of the two ventilation ring bladders (64) is greater than the distance between the two ventilation ring bladders (64).

2. The high-voltage switch housing according to claim 1, characterized in that, The closed annular groove (32) is annular, the open annular groove (31) is an open annular groove, and the mouth of the warning tube (5) faces the middle of the opening of the open annular groove (31).

3. A high-voltage switch housing according to claim 1, characterized in that, The warning tube (5) includes a tube body (51) with its opening connected to a circular warning hole and a limiting cover (52) threadedly sealed to the outside of another opening of the tube body (51). A signal switch (71) is installed on the inner wall of the limiting cover (52). The signal switch (71) is used to control the opening and closing of the alarm (7). A gas detection string is provided inside the tube body (51). A support plate (9) is fixedly connected to the inner wall of the middle part of the tube body (51). The gas detection string moves through the support plate (9). The gas detection string is fixedly connected to the limiting cover (52).

4. A high-voltage switch housing according to claim 3, characterized in that, The gas detection string includes a rod body (82), a plurality of string limiting pieces (81) fixedly connected to one end of the rod body (82) away from the limiting cover (52), an actuating cylinder (84) fixedly connected to one end of the rod body (82) near the limiting cover (52), and a rod-carrying wire (83) fixedly connected between the limiting cover (52) and the rod body (82). The rod-carrying wire (83) movably passes through the actuating cylinder (84), and the outer end of the string limiting piece (81) is fixedly bonded to the inner wall of the tube body (51).

5. A high-voltage switch housing according to claim 4, characterized in that, The limiting plate (81) is an elastic sealing structure. The signal switch (71), the rod line (83), the trigger cylinder (84), and the rod body (82) are coaxially arranged, and the rod line (83) is an elastic structure in a stretched state.

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