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CN-224232589-U - High-voltage direct-current ice-melting isolating switch

CN224232589UCN 224232589 UCN224232589 UCN 224232589UCN-224232589-U

Abstract

The utility model relates to a high-voltage direct-current deicing isolating switch which is structurally characterized in that a 550KV post insulator and a 35KV post insulator are arranged on the top of a base in parallel, a grading ring is arranged on the top of the 550KV post insulator, a fixed contact is arranged on the grading ring, a main knife switch with a bending structure is arranged between the 35KV post insulator and the fixed contact, a bending control mechanism is arranged at the bottom of the main knife switch, an electric operating mechanism at the bottom of the base is connected with the bending control mechanism through an operating rod, and a contact plate at the top of the main knife switch is spliced with the fixed contact after the main knife switch is unfolded. The structure of the high-voltage direct-current ice melting isolating switch increases the conductive cross section of the conductive pipe, improves the through-current capacity of products, adopts a bending structure, has the characteristics of flexible rotation and strong corrosion resistance, simplifies the structure of the products, facilitates the later maintenance, prolongs the overhaul period, and ensures the stability of opening and closing operations of the products after the products run for many years.

Inventors

  • ZHAO SONGLIN
  • GU SHUQING
  • GAO LIN
  • QIN YAN
  • WANG YAO

Assignees

  • 新东北电气集团隔离开关有限公司

Dates

Publication Date
20260512
Application Date
20250604

Claims (8)

  1. 1. A high-voltage direct-current deicing isolating switch is characterized in that a 550KV post insulator (3) and a 35KV post insulator (5) are arranged on the top of a base (7) in parallel, a grading ring (2) is arranged on the top of the 550KV post insulator (3), a fixed contact (1) is arranged on the grading ring (2), a main knife switch (4) with a bending structure is arranged between the 35KV post insulator (5) and the fixed contact (1), a bending control mechanism is arranged at the bottom of the main knife switch (4), an electric operating mechanism (9) at the bottom of the base (7) is connected with the bending control mechanism through an operating rod (8), and a contact plate (4-1) at the top of the main knife switch (4) after being unfolded is spliced with the fixed contact (1).
  2. 2. The high-voltage direct-current ice melting isolation switch according to claim 1, wherein the main switch blade (4) comprises an upper conductive tube (4-2), a lower conductive tube (4-5) and a contact plate (4-1), the lower end of the lower conductive tube (4-5) is connected with a rotating frame (4-3), the rotating frame (4-3) is hinged with a base (4-6) through a pin shaft, the upper end of the lower conductive tube (4-5) is hinged with the upper conductive tube (4-2) through a joint assembly (4-4), the top of the upper conductive tube (4-2) is connected with the contact plate (4-1), a crank arm (4-7) is connected on the base (4-6) through a rotating shaft, one end of the crank arm (4-7) is connected with one end of a pull rod group (4-8), the other end of the pull rod group (4-8) passes through the hollow lower conductive tube (4-5) to be connected with the joint assembly (4-4), the rotating shaft fixedly connected with the other end of the pull arm (4-7) passes through the base (4-6) to be connected with a 35 to operate an insulator (4-9), the insulator is connected with the output shaft (4-9) through an insulator, and the rotating motion is controlled by the insulator (35) to rotate.
  3. 3. The high-voltage direct-current ice-melting isolating switch according to claim 2, wherein the joint assembly (4-4) comprises an upper joint (41), a lower joint (42), a pull plate (43), a supporting plate (44) and a joint welding device (45), wherein the upper joint (41) and the lower joint (42) are of U-shaped structures with openings buckled, one ends of the upper joint (41), the lower joint (42) and the supporting plate (44) are hinged through a first hinge shaft (47), the top of the pull rod group (4-8) extends out of the lower conductive tube (4-5) to be connected with the joint welding device (45), the joint welding device (45) is of an L-shaped structure with the top bent outwards, the vertical end of the joint welding device (45) is hinged with one end of the pull plate (43) through a fourth hinge shaft (49), the horizontal end of the joint welding device (45) is hinged with the other end of the supporting plate (44) through a third hinge shaft (48), a second hinge shaft (46) is further arranged on the upper joint (41), and the other end of the pull plate (43) is hinged with the upper joint (41) through the second hinge shaft (46).
  4. 4. A high-voltage direct-current ice melting isolation switch according to claim 3 is characterized in that the pull rod group (4-8) comprises a main pull rod (51) and an auxiliary pull rod (59), one end of the main pull rod (51) is hinged with the crank arm (4-7), the other end of the main pull rod (51) is hinged with one end of the bent crank arm (52), the other end of the bent crank arm (52) and the rotating frame (4-3) are jointly hinged with a lug structure of the base (4-6) through a transverse shaft (53), one end of the auxiliary pull rod (59) is hinged with a lug arranged in the middle of the base (4-6) through a pin shaft, the other end of the auxiliary pull rod (59) is hinged with the extension pull rod (54), and the extension pull rod (54) stretches out of the lower conducting tube (4-5) to be connected with the joint assembly (4-4).
  5. 5. The high-voltage direct-current ice melting isolation switch of claim 4, wherein a roller (55) is arranged at the hinged position of the bottom of the extension pull rod (54), the roller (55) is in rolling fit with the inner cavity of the rotating frame (4-3), a limiting plate (56) is arranged on the extension pull rod (54), a fixed sleeve (57) is arranged in the inner cavity of the middle of the lower conducting tube (4-5), a balance spring (58) is coaxially matched with the extension pull rod (54), one end of the balance spring is supported on the fixed sleeve (57), and the other end of the balance spring is supported on the limiting plate (56).
  6. 6. The high-voltage direct-current ice melting isolation switch of claim 1 is characterized in that the static contact (1) comprises a static contact seat (1-3), contact fingers (1-4) and springs (1-5), the top of the equalizing ring (2) is connected with a wiring board (1-2) through a steel bracket (1-1), the end part of the wiring board (1-2) extends outwards and is connected with the static contact seat (1-3), two sides of the lower part of the static contact seat (1-3) are respectively provided with a static contact piece (1-8), the inner sides of the static contact pieces (1-8) are respectively provided with the contact fingers (1-4), the outer end sides of the contact fingers (1-4) are supported and positioned through the springs (1-5), the contact board (4-1) is of a blade type structure, and the contact board (4-1) is inserted into the two contact fingers (1-4).
  7. 7. The high-voltage direct-current ice melting isolation switch of claim 6, wherein the bottom fixing structure of the static contact seat (1-3) is connected with a guide plate (1-7), and the bottom of the guide plate (1-7) is a conical opening.
  8. 8. The high-voltage direct-current ice melting isolation switch of claim 6, wherein the bottom of the static contact seat (1-3) is connected with a rain cover (1-6), and the rain cover (1-6) shields the static contact pieces (1-8) and the contact fingers (1-4).

Description

High-voltage direct-current ice-melting isolating switch Technical Field The utility model relates to a high-voltage direct-current ice melting isolating switch, in particular to a high-voltage direct-current ice melting isolating switch with a vertical fracture, and belongs to the technical field of ultrahigh-voltage power equipment. Background Under the low temperature environment, the transmission line is easy to be covered with ice, so that the weight of the wire is increased, the wire is bent and sagged, and when the ice is covered with ice and exceeds the bearing capacity of the wire, the wire is broken, and the power supply is interrupted. The high-voltage ice-melting isolating switch is an important switching device for melting ice when the power transmission line is covered with ice. With the continuous development of the power industry and the progress of the power equipment technology, the power system provides the requirements of simple structure, simple operation, reliable operation, long service life and convenient installation and maintenance for the ice melting isolation switch. The existing 550kV high-voltage isolating switch with the vertical fracture has the defects that firstly, the product structure generally adopts a clamp structure, the structure of a moving contact of the structure is complex, and transmission parts are all arranged in a conductive tube, so that the maintenance is inconvenient. The contact points between the movable contact and the fixed contact of the clamp type structure are relatively fewer, the through-current capability is poor, the influence of external environment is large, the situation that the knife switch is out of alignment easily occurs, the clamping force of the contact is reduced, the contact resistance is increased, and the contact is easy to heat. And the transmission structure is a gear rack structure, the assembly process is complex, the requirements on gear rack quenching and tempering are high, the condition of broken teeth is easy to occur, and the overhaul and maintenance workload is high. Disclosure of Invention The technical problem to be solved by the utility model is to provide the high-voltage direct-current ice melting isolation switch, wherein the structure of the high-voltage direct-current ice melting isolation switch increases the conductive cross section of the conductive pipe, improves the through-current capacity of a product, adopts a bending structure, has the characteristics of flexible rotation and strong corrosion resistance, simplifies the structure of the product, facilitates the later maintenance, prolongs the overhaul period, and ensures the stability of opening and closing operations of the product after a plurality of years of operation. The high-voltage direct-current deicing isolating switch comprises a base, wherein a 550KV post insulator and a 35KV post insulator are arranged on the top of the base in parallel, a equalizing ring is arranged on the top of the 550KV post insulator, a fixed contact is arranged on the equalizing ring, a main knife with a bending structure is arranged between the 35KV post insulator and the fixed contact, a bending control mechanism is arranged at the bottom of the main knife, an electric operating mechanism at the bottom of the base is connected with the bending control mechanism through an operating rod, and a contact plate at the top of the main knife is spliced with the fixed contact after the main knife is unfolded. The main switch blade comprises an upper conductive pipe, a lower conductive pipe and a contact plate, wherein the lower end of the lower conductive pipe is connected with a rotating frame, the rotating frame is hinged with a machine base through a pin shaft, the upper end of the lower conductive pipe is hinged with the upper conductive pipe through joint assembly, the top of the upper conductive pipe is connected with the contact plate, the machine base is connected with a turning arm through a rotating shaft, one end of the turning arm is connected with one end of a pull rod group, the other end of the pull rod group penetrates through the hollow lower conductive pipe to be assembled and connected with the joint assembly, the rotating shaft fixedly connected with the other end of the turning arm penetrates through the machine base to be connected with a 35KV operation insulator, and an output shaft of the electric operation mechanism rotates to output and controls the 35KV operation insulator to rotate through an operation rod. The joint assembly comprises an upper joint, a lower joint, a pull plate, a support plate and joint welding equipment, wherein the upper joint and the lower joint are of U-shaped structures with openings buckled, one ends of the upper joint, the lower joint and the support plate are hinged through a first hinge shaft, the top of a pull rod group extends out of a lower conductive pipe and is connected with the joint welding equipment, the joint we