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CN-122025464-A - Isolation switch

CN122025464ACN 122025464 ACN122025464 ACN 122025464ACN-122025464-A

Abstract

The invention discloses an isolating switch, which relates to the technical field of high-voltage isolating switches and comprises a mounting base, wherein two insulating columns are fixedly connected to the upper surface of the mounting base, a knife switch plate and a contact plate are fixedly arranged at the top ends of the two insulating columns respectively, one end of the knife switch plate is rotatably connected with the top ends of the insulating columns through a rotating shaft, a cleaning mechanism is arranged on the surface of the mounting base and comprises a first limiting ring and a second limiting ring which are rotatably arranged on the surface of the insulating columns, a 匚 -shaped movable frame is fixedly connected between the first limiting ring and the second limiting ring, and a plurality of extension rods are fixedly connected to the surface of one side, close to the insulating columns, of the 匚 -shaped movable frame. According to the invention, the cleaning mechanism is arranged on the surface of the mounting base, the cleaning brush of the cleaning mechanism can rotate around the insulating column, and the cleaning brush is matched with the air nozzle of the air spraying column to spray air for dust removal, so that dust and impurities on the surface of the insulating column can be efficiently removed, pollution flashover accidents are avoided, and the insulating performance and the running stability of equipment are improved.

Inventors

  • TAO RUIHAN

Assignees

  • 高江电力科技有限公司

Dates

Publication Date
20260512
Application Date
20260323

Claims (10)

  1. 1. The isolating switch comprises a mounting base (1) and is characterized in that two insulating columns (2) are fixedly connected to the upper surface of the mounting base (1), a knife switch plate (3) and a contact plate (4) are fixedly arranged at the top ends of the two insulating columns (2) respectively, and one end of the knife switch plate (3) is rotatably connected with the top ends of the insulating columns (2) through a rotating shaft; The surface of installation base (1) is provided with clearance mechanism (5), clearance mechanism (5) are including rotating first spacing ring (501) and second spacing ring (502) that set up on insulating column (2) surface, fixedly connected with 匚 shape fly frame (503) between first spacing ring (501) and second spacing ring (502), one side fixed surface that 匚 shape fly frame (503) is close to insulating column (2) is connected with a plurality of extension pole (504), the equal fixedly connected with in upper and lower surface of extension pole (504) is trapezoidal cleaning brush (505), the overlap joint of cleaning brush (505) and the quotation of insulating column (2).
  2. 2. The isolating switch of claim 1, wherein the cleaning mechanism (5) further comprises two air injection columns (506) fixedly connected to the upper surface of the mounting base (1), and two air injection cylinders (507) fixedly arranged on the lower surface of the mounting base (1), a plurality of air injection nozzles (508) are fixedly arranged on one side surface of each air injection column (506) close to the insulating column (2), and the plurality of air injection nozzles (508) are longitudinally arranged on the surface of each air injection column (506) in a linear array.
  3. 3. The isolating switch of claim 2, wherein the lower surface of the mounting base (1) is fixedly provided with a driving mechanism (6), the driving mechanism (6) comprises a driving motor (601) fixed on the lower surface of the mounting base (1), and two transmission shafts (602) and a linkage shaft (603) rotatably connected on the lower surface of the mounting base (1), the output end of the driving motor (601) is fixedly connected with a driving rod (604), the surface of the driving rod (604) is fixedly connected with two worms (605), the surface of the transmission shaft (602) is fixedly connected with a worm wheel (606), the position of the worm wheel (606) corresponds to the worm (605), and the two worms (605) are respectively meshed with the two worm wheels (606).
  4. 4. The isolating switch of claim 3, wherein a driving synchronizing wheel (607) is fixedly connected to the surface of the transmission shaft (602), a driven synchronizing wheel (608) is fixedly connected to the surface of the linkage shaft (603), a synchronous belt (609) is installed between the driving synchronizing wheel (607) and the driven synchronizing wheel (608), the driving synchronizing wheel (607) is in transmission connection with the driven synchronizing wheel (608) through the synchronous belt (609), a linkage turntable (610) is fixedly connected to the end part of the linkage shaft (603), and a linkage push rod (611) is rotatably connected to the surface of the linkage turntable (610).
  5. 5. The isolating switch of claim 4, wherein the inner wall of the air injection cylinder (507) is slidably connected with a piston disc, a piston rod (509) is fixedly connected to the surface of the piston disc, one end of the linkage push rod (611) far away from the linkage rotary table (610) is rotatably connected with the end part of the piston rod (509), the output end of the air injection cylinder (507) is fixedly connected with an air duct (510), and one end of the air duct (510) far away from the air injection cylinder (507) extends to the upper part of the mounting base (1) and is fixedly connected with the air inlet end of the air injection cylinder (506).
  6. 6. The isolating switch of claim 5, wherein the air inlet end of the air injection cylinder (507) is fixedly connected with an air inlet pipe (511), the air inlet end of the air inlet pipe (511) is fixedly connected with a one-way air inlet valve, and the surface of the air guide pipe (510) is fixedly connected with a one-way air outlet valve.
  7. 7. The isolating switch of claim 6, wherein the diameter of the driving synchronizing wheel (607) is three times that of the driven synchronizing wheel (608), a protecting shell is fixedly arranged on the lower surface of the mounting base (1), one end of the driving rod (604) far away from the driving motor (601) is rotatably connected with the inner wall of the protecting shell, and the driving mechanism (6) is positioned in the protecting shell.
  8. 8. The isolating switch of claim 7, wherein a rotary sleeve (512) is fixedly connected to the lower surface of the second limiting ring (502), a driven toothed ring (513) is fixedly connected to the surface of the rotary sleeve (512), the top end of the transmission shaft (602) extends to the upper side of the mounting base (1), a driving gear (514) is fixedly connected to the surface of the transmission shaft (602), and the driving gear (514) is meshed with the driven toothed ring (513).
  9. 9. The isolating switch of claim 8, wherein two pairs of annular baffle plates (515) corresponding to each other up and down are fixedly connected to the surface of the insulating column (2), the first limiting ring (501) and the second limiting ring (502) are respectively connected between each pair of annular baffle plates (515) in a rotating mode, and the annular baffle plates (515) are used for conducting rotary guiding and horizontal limiting on the first limiting ring (501) and the second limiting ring (502).
  10. 10. The isolating switch of claim 9, wherein an L-shaped connecting rod (516) is fixed at the top of the insulating column (2), and one end of the L-shaped connecting rod (516) far away from the insulating column (2) is fixedly connected with the top end of the air injection column (506).

Description

Isolation switch Technical Field The invention relates to the technical field of high-voltage isolating switches, in particular to an isolating switch. Background The high-voltage isolating switch is one of core equipment in a power transmission and transformation link of a power system, and is widely applied to transformer substations, power plants and high-voltage distribution networks. The main function of the circuit is to open and close the circuit under the condition of no load current, so as to provide reliable electrical isolation fracture for electrical equipment maintenance and ensure personal safety of maintenance personnel and stable operation of equipment. Under severe weather conditions such as humidity, fog days, condensation and the like, the pollutants can form conductive channels on the surfaces of the insulating support posts, so that pollution flashover accidents are caused. The occurrence of pollution flashover accidents can lead to short circuit tripping of a circuit, and large-area power failure can be caused when the occurrence of pollution flashover accidents is serious, so that the safety and stability operation of a power system are greatly threatened. Moreover, pollution flashover can also cause irreversible corrosion and damage to the surface of the insulating support, so that the service life of the insulating support is shortened, and the maintenance cost and the replacement frequency of equipment are increased. At present, traditional processing mode mainly relies on artifical periodic cleaning, and manual cleaning needs staff to climb to the overhead working, exists very big potential safety hazard, and still some isolator have equipped with independent jet-propelled dust collector, sweeps insulating pillar surface's dust through high-pressure air current, but the jet-propelled subassembly and the isolator of this kind of device are mutually independent, need additionally dispose actuating system, have increased the whole volume and the manufacturing cost of equipment. Therefore, the high-voltage isolating switch has the advantages of automatic and efficient cleaning functions, compact driving structure, stable operation and convenience in maintenance. Disclosure of Invention The present invention is directed to an isolating switch, which solves the above-mentioned problems. The isolating switch comprises a mounting base, wherein two insulating columns are fixedly connected to the upper surface of the mounting base, a knife switch plate and a contact plate are fixedly arranged at the top ends of the two insulating columns respectively, one end of the knife switch plate is rotatably connected with the top ends of the insulating columns through a rotating shaft, and the insulating columns are made of epoxy resin composite materials and have excellent insulating performance and high mechanical strength. The top ends of the two insulating columns are respectively fixedly provided with a knife switch plate and a contact plate, one end of the knife switch plate is rotationally connected with the top ends of the insulating columns through a rotating shaft, and the connection or disconnection of a circuit is realized through the contact or separation of the knife switch plate and the contact plates, so that the basic requirement of high-voltage circuit isolation is met; The surface of installation base is provided with clearance mechanism, clearance mechanism is including rotating first spacing ring and the second spacing ring that sets up on the insulating column surface, fixedly connected with 匚 shape adjustable shelf between first spacing ring and the second spacing ring, 匚 shape adjustable shelf is close to one side fixedly connected with a plurality of extension pole of insulating column, the equal fixedly connected with in upper and lower surface of extension pole is trapezoidal cleaning brush, the quotation overlap joint of cleaning brush and insulating column is worth the explanation, guarantees that clearance mechanism movement track is reliable and stable, and annular separation blade can carry out rotatory direction and horizontal spacing to first spacing ring and second spacing ring, avoids the clearance mechanism to appear skew, rock scheduling problem when moving, guarantees that the cleaning brush laminates the insulating column surface all the time, promotes the accuracy and the reliability of clearance action. Preferably, the cleaning mechanism further comprises two air injection columns fixedly connected to the upper surface of the mounting base and two air injection cylinders fixedly arranged on the lower surface of the mounting base, a plurality of air nozzles are fixedly arranged on the surface of one side, close to the insulating column, of the air injection columns, and the plurality of air nozzles are longitudinally distributed on the surface of the air injection columns in a linear array. Preferably, the lower surface of the installation base is fixedly prov