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CN-122000803-A - Low-loss intelligent high-low voltage switchgear

CN122000803ACN 122000803 ACN122000803 ACN 122000803ACN-122000803-A

Abstract

The invention belongs to the technical field of electrical switch equipment, and particularly relates to low-loss intelligent high-low voltage switchgear, which comprises a wiring cabinet, a switch cabinet main body arranged at the top of the wiring cabinet, a plurality of terminal assemblies arranged on the inner side wall of the upper end of the wiring cabinet, crimping nuts arranged on the terminal assemblies, a plurality of guide covers detachably arranged on the inner side wall of the top of the wiring cabinet, terminal assemblies in the same column arranged in the corresponding guide covers, and an air supply unit arranged at the back of the wiring cabinet, wherein the air outlet end of the air supply unit is communicated with the inside of the guide covers. According to the invention, vicious circle of heating at the connection part of the terminal and increasing of contact resistance can be avoided, electric energy loss at the connection part of the terminal is reduced, the loosening state of the crimping nut can be detected on line, overhaul is timely reminded, positioning and screwing of the crimping nut are assisted to ensure stable contact, the running stability of equipment is improved, and overhaul and maintenance frequency is reduced.

Inventors

  • MEI WENLONG

Assignees

  • 南通星宇电气有限公司

Dates

Publication Date
20260508
Application Date
20260204

Claims (8)

  1. 1. The utility model provides a low-loss intelligent high-low voltage switchgear, includes wiring closet (1) and installs cubical switchboard main part (2) at wiring closet (1) top, a plurality of terminal subassembly (3) are installed to the upper end inside wall of wiring closet (1), crimping nut (4) are installed to terminal subassembly (3), its characterized in that still includes: the guide covers (5) are detachably arranged on the inner side wall of the top of the wiring cabinet (1), and the terminal assemblies (3) in the same longitudinal row are arranged in the corresponding guide covers (5); The air supply unit (6) is arranged at the back of the wiring cabinet (1), the air outlet end of the air supply unit (6) is communicated with the inside of the air guide sleeve (5), and the air suction end of the air supply unit (6) is communicated with the inside of the wiring cabinet (1); The exhaust unit (7) is arranged on the front side wall of the wiring cabinet (1), the air inlet end of the exhaust unit (7) is communicated with the air guide sleeve (5), and the air outlet end of the exhaust unit (7) is communicated with the inside of the wiring cabinet (1); the looseness detection unit (8) is installed inside the wiring cabinet (1), and the looseness detection unit (8) detects the tightness state of the compression joint nut (4).
  2. 2. The low-loss intelligent high-low voltage switchgear assembly according to claim 1, wherein the air supply unit (6) comprises a sealing cover (61) fixed on the back of the wiring cabinet (1), an air pump (62) is fixed in the sealing cover (61), an air pipe (63) is fixed at the output end of the air pump (62), an air inlet transverse pipe (64) with two sealed ends is fixedly communicated with the air outlet end of the air pipe (63), an air inlet shunt pipe (65) communicated with the air guide cover (5) is fixedly inserted into the pipe wall of the air inlet transverse pipe (64), an air suction pipe (66) communicated with the inside of the wiring cabinet (1) is fixedly communicated with the air suction end of the air pump (62), and the air pump (62) is electrically connected with the control end of the switchgear main body (2).
  3. 3. The low-loss intelligent high-low voltage switchgear assembly according to claim 2, wherein the exhaust unit (7) comprises an air outlet transverse pipe (71) with two sealed ends, the air outlet transverse pipe (71) is arranged on the outer side of the wiring cabinet (1), a plurality of air outlet shunt pipes (72) are fixedly inserted into the pipe wall of the air outlet transverse pipe (71), the air outlet shunt pipes (72) are provided with temperature measuring components (9), the air outlet shunt pipes (72) are communicated with the air guide cover (5) through the temperature measuring components (9), and a return pipe (73) communicated with the inside of the wiring cabinet (1) is fixedly inserted into the pipe wall of the air outlet transverse pipe (71).
  4. 4. A low-loss intelligent high-low voltage switchgear assembly according to claim 3, characterized in that, temperature measurement assembly (9) is including fixing temperature measurement box (91) at terminal block (1) lateral wall, kuppe (5) are linked together with giving vent to anger shunt tubes (72) through temperature measurement box (91), the top of temperature measurement box (91) is fixed with temperature measurement probe (92), and temperature measurement end setting of temperature measurement probe (92) is in the inside of temperature measurement box (91), the control end of switch cabinet main part (2) is according to the electric signal control of temperature measurement probe (92) feedback and is become flexible detection element (8) work.
  5. 5. The low-loss intelligent high-low voltage switchgear according to claim 4, wherein the loosening detection unit (8) comprises an insulation top cover (81) fixed on the inner side wall of the top of the wiring cabinet (1), a fixed conducting head (82) and an insulation cylinder (83) are fixed at the bottom of the insulation top cover (81), the fixed conducting head (82) is arranged on the inner side of the insulation cylinder (83), an insulation sliding rod (84) is inserted at the bottom of the insulation cylinder (83) in a sliding manner, a movable conducting head (85) is fixed at the top of the insulation sliding rod (84), a hemispherical block (86) is fixed at the bottom of the insulation sliding rod (84), a positioning top pressing block (87) is fixed at the bottom of the crimping nut (4), when the positioning top pressing block (87) is in contact with the lowest point of the hemispherical block (86), the top of the movable conducting head (85) is in contact with the top of the fixed conducting head (82), and the switch main body (2) detects the conducting state of the movable conducting head (85) and the fixed conducting head (82) according to an electric signal fed back by the temperature measuring probe (92).
  6. 6. The low-loss intelligent high-low voltage switchgear assembly according to claim 4, wherein the semiconductor refrigerator (10) is fixed on the side wall of the sealing cover (61), the refrigerating end of the semiconductor refrigerator (10) is arranged in the sealing cover (61), and the control end of the switch cabinet main body (2) controls the semiconductor refrigerator (10) to work according to the electric signal fed back by the temperature measuring probe (92).
  7. 7. The low-loss intelligent high-low voltage switchgear assembly according to claim 1, wherein a plurality of wire through holes are formed in the bottom of the air guide sleeve (5), and rubber sealing rings (11) are fixed in the wire through holes.
  8. 8. The low-loss intelligent high-low voltage switchgear assembly according to claim 5, wherein an indicator lamp (12) is fixed on the outer side wall of the insulating cylinder (83), and the indicator lamp (12) is connected in series with the movable conductive head (85) and the fixed conductive head (82).

Description

Low-loss intelligent high-low voltage switchgear Technical Field The invention belongs to the technical field of electrical switching equipment, and particularly relates to low-loss intelligent high-low voltage complete switching equipment. Background The high-low voltage complete switch equipment is a core power distribution device of an electric power system, can realize transmission, distribution, control and protection of electric energy, is widely applied to new energy power stations such as power grid substations, industrial plants, high-rise buildings, photovoltaics, wind power and the like, and provides key support for reliable power supply in various scenes. At present, special wire inlet sides and wire outlet sides are generally arranged in the high-low voltage complete switch equipment and used for realizing input, output and reasonable distribution of electric energy, but a cable and a terminal are connected in a bolt crimping type rigid mode, a microscopic gap is prone to exist in a contact interface, so that resistance at a contact position is high, larger heating value is generated, contact point oxidation is further increased due to heat, the contact resistance is further increased, and accordingly vicious circle of 'large heating value-increased contact resistance-further increased heating value' is involved, electric energy loss at the cable and the wire connecting terminal is greatly increased, meanwhile, the wire connecting terminal is loose due to thermal expansion and contraction effects, the connection stability of the cable and the terminal is damaged, the wire inlet sides and the wire outlet sides are arranged in a concentrated mode, local heat superposition is prone to be formed, the occurrence probability of the problems is further increased, and the operation stability of the high-low voltage complete switch equipment is seriously affected. Disclosure of Invention The invention aims to solve the problems and provides low-loss intelligent high-low voltage switchgear. In order to achieve the purpose, the invention adopts the following technical scheme that the low-loss intelligent high-low voltage switchgear comprises a wiring cabinet and a switch cabinet main body arranged at the top of the wiring cabinet, wherein a plurality of terminal assemblies are arranged on the inner side wall of the upper end of the wiring cabinet, and the terminal assemblies are provided with compression nuts, and the low-loss intelligent high-low voltage switchgear further comprises: The guide hoods are detachably arranged on the inner side wall of the top of the wiring cabinet, and terminal assemblies in the same column are arranged in the corresponding guide hoods; The air supply unit is arranged at the back of the wiring cabinet, the air outlet end of the air supply unit is communicated with the inside of the air guide sleeve, and the air suction end of the air supply unit is communicated with the inside of the wiring cabinet; the exhaust unit is arranged on the front side wall of the wiring cabinet, the air inlet end of the exhaust unit is communicated with the air guide sleeve, and the air outlet end of the exhaust unit is communicated with the inside of the wiring cabinet; And the loosening detection unit is arranged in the wiring cabinet and detects the tightness state of the crimping nut. Preferably, the air supply unit includes the sealed cowling of fixing in the wiring closet back, the inside of sealed cowling is fixed with the air pump, the output of air pump is fixed with the gas-supply pipe, the fixed intercommunication of the gas-supply pipe's end of giving vent to anger has the sealed horizontal pipe that admits air in both ends, the pipe wall of the horizontal pipe of admitting air is fixed to peg graft and is had the shunt tubes that admits air that is linked together with the kuppe, the fixed intercommunication of the suction end of air pump has the breathing pipe that is linked together with the wiring closet inside, air pump and the control end electric connection of cubical switchboard main part. Preferably, the exhaust unit comprises a transverse air outlet pipe with two sealed ends, the transverse air outlet pipe is arranged at the outer side of the wiring cabinet, a plurality of air outlet shunt pipes are fixedly inserted into the pipe wall of the transverse air outlet pipe, the temperature measuring component is installed on the air outlet shunt pipes, the air outlet shunt pipes are communicated with the air guide cover through the temperature measuring component, and a return air pipe communicated with the inside of the wiring cabinet is fixedly inserted into the pipe wall of the transverse air outlet pipe. Preferably, the temperature measuring assembly comprises a temperature measuring box fixed on the outer side wall of the wiring cabinet, the guide cover is communicated with the air outlet shunt pipe through the temperature measuring box, a temperature measuring probe is fixe