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CN-224232588-U - Protective main knife switch structure of double-column horizontal telescopic isolating switch

CN224232588UCN 224232588 UCN224232588 UCN 224232588UCN-224232588-U

Abstract

The protective main switch blade structure of the double-column horizontal telescopic isolating switch is characterized in that a moving contact is connected with one end of a front rod, the other end of the front rod is connected with one end of a rear supporting rod and one end of a rear transmission rod through a joint mechanism, the other end of the rear supporting rod and the other end of the rear transmission rod are connected with the inner structure of a transmission box, one end of a transmission shaft is exposed out of the transmission box, and the other end of the transmission shaft is connected with the inner structure of the transmission box. The transmission box is internally provided with a crank arm mechanism connected with a transmission shaft, the action output end of the crank arm mechanism is connected with one end of a connecting rod, the connecting rod is driven to move forwards and backwards through the transmission shaft, the other end of the connecting rod is connected with a driving rotating shaft through the transmission mechanism, the driving rotating shaft is driven to rotate through the connecting rod, two ends of the driving rotating shaft extend out of the transmission box and are connected with a rear transmission rod, and a driven shaft extends out of the transmission box and is connected with a rear supporting rod. The utility model simplifies the assembly structure, avoids the influence of the environment on key components, ensures the long-term stable operation of equipment, prolongs the maintenance period and improves the safety and stability of the power grid line.

Inventors

  • WANG YINGZE
  • GU SHUQING
  • GAO LIN
  • QIN YAN
  • WANG YI

Assignees

  • 新东北电气集团隔离开关有限公司

Dates

Publication Date
20260512
Application Date
20250603

Claims (6)

  1. 1. The protective main switch blade structure of the double-column horizontal telescopic isolating switch is characterized by comprising a rear supporting rod (1), a rear transmission rod (2), a transmission part (3), a balance spring (4), a transmission box (5), a transmission shaft (6), a moving contact (7) and a front rod (8), wherein the moving contact (7) is connected with one end of the front rod (8), the other end of the front rod (8) is connected with the rear supporting rod (1) and one end of the rear transmission rod (2) through a joint mechanism (9), the other end of the rear supporting rod (1) and the other end of the rear transmission rod (2) are connected with the internal structure of the transmission box (5), one end of the transmission shaft (6) is exposed out of the transmission box (5), and the other end of the transmission shaft (6) is connected with the internal structure of the transmission box (5); The transmission box (5) is provided with a crank mechanism (11) connected with a transmission shaft (6), the action output end of the crank mechanism (11) is connected with one end of a connecting rod I (5-1), the connecting rod I (5-1) is driven to move forwards and backwards through the transmission shaft (6), the other end of the connecting rod I (5-1) is connected with a driving rotating shaft (5-3) through a transmission mechanism (10), the driving rotating shaft (5-3) is driven to rotate through the connecting rod I (5-1), two ends of the driving rotating shaft (5-3) extend out of the transmission box (5) and are connected with a rear transmission rod (2), and two ends of a driven shaft (5-4) extend out of the transmission box (5) and are connected with a rear supporting rod (1).
  2. 2. The protective main knife switch structure of the double-column horizontal telescopic isolating switch is characterized in that the joint mechanism (9) is composed of a connecting rod II (9-1) and a tripod (9-2), the tripod (9-2) is in an isosceles triangle shape, the vertex angle of the isosceles triangle is an obtuse angle, the connecting rod II (9-1) is three, one end of one connecting rod II (9-1) is connected with the end of a front rod (8), the other end of the other connecting rod II is connected with one bottom angle of the tripod (9-2), one end of the other two connecting rods II (9-1) is connected with the end of the front rod (8) and the end of a rear transmission rod (2) respectively, the other bottom angle of the tripod (9-2) is connected with the rear support rod (1), the vertex angle of the tripod (9-2) is connected with the rear transmission rod (2), and the lengths of the isosceles edges of the connecting rod II (9-1) and the tripod (9-2) are equal.
  3. 3. The protective main knife switch structure of the double-column horizontal telescopic isolating switch of claim 1, wherein a balance spring pull rod (5-2) is arranged in the transmission box (5), one end of the balance spring pull rod (5-2) is connected with the inner wall of the transmission box (5), the other end of the balance spring pull rod (5-2) is connected with the driving rotating shaft (5-3) through a transmission mechanism (10), and a balance spring (4) is arranged on the balance spring pull rod (5-2).
  4. 4. The protective main knife switch structure of the double-column horizontal telescopic isolating switch as claimed in claim 3, wherein the number of the transmission mechanisms (10) is 3, one of the transmission mechanisms is connected with the connecting rod I (5-1), and the two sides of the transmission mechanism are connected with the balance spring pull rods (5-2).
  5. 5. The protective main knife switch structure of the double-column horizontal telescopic isolating switch of claim 4, wherein the transmission mechanism (10) comprises double-lug plates I (10-2) connected with the driving rotating shaft (5-3), pins I (10-3) penetrate through the other ends of the double-lug plates I (10-2), clamping pieces (10-1) are arranged on two sections of the pins I (10-3), and the clamping pieces (10-1) are connected with the connecting rod I (5-1) or the balance spring pull rod (5-2).
  6. 6. The protective main knife switch structure of the double-column horizontal telescopic isolating switch of claim 1, wherein the turning arm mechanism (11) comprises a turning piece (11-1), one end of the turning piece (11-1) is connected with a transmission shaft (6), the turning piece is driven to rotate by the transmission shaft (6), the other end of the turning piece (11-1) is connected with a connecting piece (11-3) through a pin II (11-2), one end of the double-lug II (11-4) is connected with a connecting rod sleeve (11-5), the other end of the double-lug II is connected with the connecting piece (11-3), and the connecting rod sleeve (11-5) is sleeved at the end part of a connecting rod I (5-1).

Description

Protective main knife switch structure of double-column horizontal telescopic isolating switch Technical Field The utility model relates to the field of ultra-high voltage power equipment, in particular to a protective main knife switch structure of a double-column horizontal telescopic isolating switch. Background The high-voltage alternating current isolating switch is an important device for ensuring safe, reliable and stable operation of a power grid in a power system, and 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 high-voltage alternating current isolating switch. The existing double-column horizontal telescopic isolating switch has the defects that firstly, a main knife balance spring device is generally placed in a rear conductive tube of the isolating switch, the rear conductive tube is required to be opened by the design mode so as to be provided with a spring guide device, therefore, the protection of the balance spring is poor, rust, abnormal sound and even failure of the balance spring can occur after the device operates for many years, and meanwhile, the balance spring arranged in the rear conductive tube is inconvenient to maintain, is difficult to observe, and is required to be completely disassembled when being replaced. And secondly, the transmission connecting rod device is exposed and is not protected, and the transmission connecting rod device has the defects that transmission parts are easy to rust and corrode and the clamping at the rotating shaft is easy to cause. Meanwhile, as the outer conductive pipe of the original structure is made of aluminum, and the inner pull rod is made of cast iron generally, when the device runs in a region with relatively large temperature difference in winter and summer, the device can be in place due to the fact that the expansion coefficients of different materials are different, and the phenomena of incomplete switching on and switching off, equipment clamping stagnation and the like are caused. Finally, the front and rear conductive pipes are all commonly in a single-pipe structure, and the defects are that the switching-on stability is poor and the operation is easy to shake. Disclosure of Invention The utility model provides a protective main knife switch structure of a double-column horizontal telescopic isolating switch for solving the technical problems in the prior art. In order to achieve the aim, the technical scheme adopted by the utility model is that the protective main knife switch structure of the double-column horizontal telescopic isolating switch comprises a rear supporting rod, a rear transmission rod, a transmission part, a balance spring assembly, a transmission box, a transmission shaft, a moving contact and a front rod, wherein the moving contact is connected with one end of the front rod, the other end of the front rod is connected with the rear supporting rod and one end of the rear transmission rod through a joint mechanism; The transmission box is internally provided with a crank mechanism connected with a transmission shaft, the action output end of the crank mechanism is connected with one end of a connecting rod I, the connecting rod I is driven to move forwards and backwards through the transmission shaft, the other end of the connecting rod I is connected with a driving rotating shaft through the transmission mechanism, the driving rotating shaft is driven to rotate through the connecting rod I, two ends of the driving rotating shaft extend out of the transmission box and are connected with a rear transmission rod, and the driven shaft and two ends of the driven shaft extend out of the transmission box and are connected with a rear supporting rod. The joint mechanism consists of a connecting rod II and a tripod, wherein the tripod is an isosceles triangle, the vertex angle of the isosceles triangle is an obtuse angle, three connecting rods II are arranged, one end of one connecting rod II is connected with the end part of a front rod, the other end of the other connecting rod II is connected with one bottom angle of the tripod, one end of the other connecting rod II is connected with the end parts of a front rod and a rear transmission rod respectively, the other bottom angle of the tripod is connected with a rear supporting rod, the vertex angle of the tripod is connected with the rear transmission rod, and the lengths of the isosceles edges of the connecting rod II and the tripod are equal. The driving box is internally provided with a balance spring pull rod, one end of the balance spring pull rod is connected with the inner wall of the driving box, the other end of the balance spring pull rod is connected with the driving rotating shaft through a driving mechanism, and the balance sprin