A high-protection type disconnector for rail transit lines

Abstract

A highly protective disconnecting switch for a rail transit line, which relates to the technical field of disconnecting switches and is used to solve the problem that a vertically opening disconnecting switch is easily affected by dust and freezing environmental factors. It includes a disconnecting switch main body. The bottom of the disconnecting switch main body has a base, and a transmission mechanism is arranged inside the base. The transmission mechanism includes a driving rotating shaft, a driven rotating shaft, a driving crank arm, a connecting piece, a first driven crank arm and a second driven crank arm. The driving rotating shaft is connected to the output shaft of the operating mechanism through a reversing transmission unit. One end of the driving crank arm is fixedly connected to the driving rotating shaft, and one end of the first driven crank arm is fixedly connected to the driven rotating shaft. The connecting piece is arranged between the other end of the driving crank arm and the other end of the first driven crank arm. One end of the second driven crank arm is fixed on the driven rotating shaft, and the other end of the second driven crank arm is hinged to the lower end of the post insulator. The upper end of the post insulator is hinged to the knife switch. The disconnecting switch of the present invention has better stability.

Description

Technical Field

[0001] The present invention relates to the technical field of disconnectors, and more specifically to a high-protection disconnector for rail transit lines. Background Art

[0002] Disconnectors are important electrical equipment in the power system, mainly used for isolating power sources, changing the system operation mode, and performing maintenance and repair of electrical equipment. Especially along the catenary railway, the operating state of the disconnector directly affects the normal operation of the train. In alpine and heavily polluted areas, the transmission mechanism and conductors of the disconnector are easily affected by harsh environmental factors such as dust and freezing, resulting in problems such as loose electrical connections, mechanical jamming, and even refusal to operate of the switch, posing a great hidden danger to train operation safety. For traditional catenary vertical-opening disconnectors, the transmission parts and conductors are all exposed outside. Existing protection measures often only target a specific environmental factor, and the protection effect is not good for multiple coexisting environmental factors. Secondly, although the existing transmission mechanism can improve the operating stability of the switch, due to the characteristics of using movable connections and spatial link transmissions, it is easily affected by environmental erosion and debugging, resulting in a decrease in the operating stability of the switch. Finally, existing protection measures and transmission mechanisms often require high manufacturing and maintenance costs, increasing the usage cost of the equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-protection disconnector for rail transit lines, which is used to solve the problems of loose electrical connections and mechanical jamming caused by the traditional catenary vertical-opening disconnector used in rail transit lines being easily affected by harsh environmental factors such as dust and freezing. The high-protection disconnector of the present invention is not easily affected by environmental erosion and thus has better operating stability.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a high-protection disconnector for rail transit lines, including a disconnector main body, the disconnector main body is provided with a post insulator and a knife switch, the bottom of the disconnector main body is provided with a base, the base internally has a transmission mechanism, the transmission mechanism includes a driving rotating shaft, a driven rotating shaft, a driving crank arm, a connecting member, a first driven crank arm, and a second driven crank arm. The driving rotating shaft is connected to the output shaft of the operating mechanism through a commutation transmission unit. Both the driving rotating shaft and the driven rotating shaft are rotatably installed inside the base. One end of the driving crank arm is fixed on the outer wall of the driving rotating shaft. One end of the first driven crank arm is fixed on the driven rotating shaft. One end of the connecting member is hinged to the other end of the driving crank arm. The other end of the connecting member is hinged to the other end of the first driven crank arm. One end of the second driven crank arm is fixed on the driven rotating shaft. The other end of the second driven crank arm is hinged to the lower end of the post insulator. The upper end of the post insulator is hinged to the knife switch.

[0005] Further, a driving bevel gear is fixed on the output shaft of the operating mechanism, a driven bevel gear is fixed on the driving rotating shaft, and the driving bevel gear is meshed and matched with the driven bevel gear.

[0006] Further, a worm is fixed on the output shaft of the operating mechanism, a worm gear is fixed on the driving rotating shaft, and the worm is meshed and matched with the worm gear.

[0007] Further, pin shafts are fixed at the other ends of the driving crank arm, the first driven crank arm, and the second driven crank arm. The end of the connecting piece is hinge-connected to the corresponding pin shafts on the driving crank arm and the first driven crank arm, and the lower end of the post insulator is hinge-connected to the corresponding pin shaft on the second driven crank arm.

[0008] Further, the connecting piece includes two parallel connecting rods, and the other ends of the driving crank arm and the first driven crank arm are both located between the two connecting rods.

[0009] Further, the base is in a U-shaped structure.

[0010] Further, a through hole is provided at the top of the base, and the other end of the second driven crank arm passes through the through hole to lift the post insulator upward to realize the opening of the disconnector.

[0011] Further, the ends of the driving rotating shaft and the driven rotating shaft are both rotatably installed on the mounting plate, and the mounting plate is fixed on the inner wall of the base through bolt assemblies.

[0012] Further, an insulating sleeve is provided at the conductive contact part of the disconnector.

[0013] Further, a protective cover is provided between the lower end of the post insulator and the upper surface of the base. The upper end of the protective cover wraps the lower end of the post insulator, and the lower end of the protective cover is in contact and fixed with the upper surface of the base around the through hole.

[0014] The beneficial effects of the present invention are as follows: By arranging the transmission mechanism inside the base, and greatly reducing the movable connections and spatial linkages of the transmission mechanism, and having multiple fixed connection methods between the components of the transmission mechanism, the influence of various environmental factors such as dust and freezing is prevented, and conductive virtual connection and mechanical jamming are avoided. Description of the Drawings

[0015] Figure 1 is the front view of the present invention;

[0016] Figure 2 is the right view of the present invention;

[0017] Figure 3 is the front view of the base of the present invention;

[0018] Figure 4 Top view of the base of the present invention;

[0019] Figure 5 is Figure 3 A - A cross - sectional view in ;

[0020] Figure 6 is Figure 4 B - B cross - sectional view in ;

[0021] Figure 7 Assembly schematic diagram between the driving rotating shaft and the output shaft of the operating mechanism;

[0022] Figure 8 Schematic diagram of setting a protective cover between the lower end of the post insulator and the upper surface of the base;

[0023] In the figure: 1 Isolator main body, 2 Base, 3 Driving rotating shaft, 4 Driving crank arm, 5 Connecting piece, 6 First driven crank arm, 7 Driven rotating shaft, 8 Second driven crank arm, 9 Pin shaft, 10 Output shaft of the operating mechanism, 11 Knife switch, 12 Post insulator, 13 Driven bevel gear, 14 Driving bevel gear, 15 Through hole, 16 Mounting plate, 17 Bolt assembly, 18 Protective cover. Detailed implementation mode

[0024] As Figures 1 to 8 shown, the present invention includes an isolator main body 1. The bottom of the isolator main body 1 is a base 2. The transmission mechanism of the isolator main body 1 is located inside the base 2. By hiding the transmission mechanism in the base 2, the transmission mechanism is protected. In addition, the present invention adopts a base 2 with a high protection level and sets a high - protection insulating sleeve on the conductive part of the isolator to increase the stability of the entire isolator. The present invention will be described in detail below with reference to the accompanying drawings.

[0025] As Figures 1 to 8 shown, a high - protection type isolator for rail transit lines includes an isolator main body 1. The isolator main body 1 is of the prior art. The isolator main body 1 is provided with a post insulator 12 and a knife switch 11. The bottom of the isolator main body 1 has a base 2. The base 2 is of a U - shaped structure and is made of stainless steel material, such as 304 stainless steel. The thickness of the base 2 is 5 mm to ensure sufficient strength and durability.

[0026] As Figure 2As shown in the figure, the base 2 is internally provided with a transmission mechanism, which includes a driving rotating shaft 3, a driven rotating shaft 7, a driving crank arm 4, a connecting member 5, a first driven crank arm 6 and a second driven crank arm 8. The driving rotating shaft 3 is connected to the output shaft 10 of the operating mechanism of the disconnector through a commutation transmission unit. There is a motor in the operating mechanism to drive the rotation of the output shaft 10 of the operating mechanism. When the output shaft 10 of the operating mechanism rotates, it drives the rotation of the driving rotating shaft 3 through the commutation transmission unit. As Figure 3 shown, the driving rotating shaft 3 and the driven rotating shaft 7 are arranged in parallel and are both rotatably installed inside the base 2. One end of the driving crank arm 4 is fixed on the outer wall of the driving rotating shaft 3, one end of the first driven crank arm 6 is fixed on the driven rotating shaft 7, one end of the connecting member 5 is hinged to the other end of the driving crank arm 4, and the other end of the connecting member 5 is hinged to the other end of the first driven crank arm 6. One end of the second driven crank arm 8 is fixed on the driven rotating shaft 7, and the other end of the second driven crank arm 8 is hinged to the lower end of the post insulator 12. The upper end of the post insulator 12 is hinged to the knife switch 11. When the output shaft 10 of the operating mechanism rotates, it drives the rotation of the driving rotating shaft 3 through the commutation transmission unit, and then drives the rotation of the driving crank arm 4, and then pulls or pushes the rotation of the first driven crank arm 6 through the connecting member 5, and then drives the rotation of the driven rotating shaft 7, and then drives the rotation of the second driven crank arm 8. When the second driven crank arm 8 rotates, it pushes the post insulator 12 upward, thereby causing the knife switch 11 to swing upward to realize opening; or, when the second driven crank arm 8 rotates, it pulls the post insulator 12 downward, thereby causing the knife switch 11 to swing downward to realize closing. Compared with the vertical-opening disconnector in the prior art, the present invention reduces the number of movable connections and spatial linkages, and more components of the transmission mechanism adopt fixed connection methods, which can avoid mechanical jamming caused by dust erosion.

[0027] As Figure 7 shown, as an embodiment of the commutation transmission unit, a driving bevel gear 14 is fixed on the output shaft 10 of the operating mechanism, a driven bevel gear 13 is fixed on the driving rotating shaft 3, and the driving bevel gear 14 is meshed and matched with the driven bevel gear 13. The driving bevel gear 14 and the driven bevel gear 13 constitute the commutation transmission unit. When the output shaft 10 of the operating mechanism rotates, it drives the driving bevel gear 14 to rotate, and then drives the driven bevel gear 13 to rotate, and then drives the rotation of the driving rotating shaft 3. At this time, the output shaft 10 of the operating mechanism can be arranged vertically, and the driving rotating shaft 3 is arranged horizontally. After commutation by the commutation transmission unit, the rotational movement of the output shaft 10 of the operating mechanism in the horizontal plane can be converted into the rotational movement of the driving rotating shaft 3 in the vertical plane.

[0028] The commutation drive unit can also be of other structural forms. For example, a worm is fixedly installed on the output shaft 10 of the operating mechanism, and a worm gear is fixedly installed on the active rotating shaft 3. The worm and the worm gear are meshed and matched, and the worm and the worm gear constitute another structural form of the commutation drive unit. At this time, the output shaft 10 of the operating mechanism is arranged vertically, and the active rotating shaft 3 is arranged horizontally. After commutation by the commutation drive unit, the rotational movement of the output shaft 10 of the operating mechanism in the horizontal plane can be converted into the rotational movement of the active rotating shaft 3 in the vertical plane.

[0029] For the convenience of assembly, as Figure 4 , Figure 5 shown, pins 9 are fixedly installed at the other ends of the second driven crank arms 8, and the lower end of the post insulator 12 is hingedly connected to the pin 9 on the second driven crank arm 8. In addition, as Figure 6 shown, the other ends of the active crank arm 4 and the first driven crank arm 6 also have pins 9. One end of the connecting member 5 is hingedly connected to the corresponding pin 9 on the active crank arm 4, and the other end of the connecting member 5 is hingedly connected to the corresponding pin 9 on the first driven crank arm 6.

[0030] As Figure 5 shown, the connecting member 5 includes two parallel connecting rods, and the other ends of the active crank arm 4 and the first driven crank arm 6 are both located between the two connecting rods.

[0031] To avoid interference with the second driven crank arm 8 and the post insulator 12, as Figure 4 shown, the top of the base 2 has a through hole 15, and the other end of the second driven crank arm 8 passes through the through hole 15 to lift the post insulator 12 upward to realize the opening of the disconnector.

[0032] As Figure 5 shown, the ends of the active rotating shaft 3 and the driven rotating shaft 7 are both rotatably installed on the mounting plate 16, and the mounting plate 16 is fixed to the inner wall of the base 2 by the bolt assembly 17.

[0033] To achieve protection, an insulating sleeve is provided at the conductive contact part of the disconnector, including the connection part between the disconnector main body 1 and the knife switch 11, to avoid erosion by dust and the like.

[0034] To block the through hole 15 and prevent dust and the like from passing through the through hole 15 and entering the base 2, as Figure 8 shown, a protective cover 18 is provided between the lower part of the post insulator 12 and the upper surface of the base 2. The upper and lower ends of the protective cover 18 are open. The upper end of the protective cover 18 wraps around the lower end of the post insulator 12, and the lower end of the protective cover 18 covers the through hole 15, that is, the lower end of the protective cover 18 is in contact and fixed with the upper surface of the base 2 around the through hole 15.

[0035] In the present invention, the transmission mechanism is arranged inside the base 2. Moreover, the movable connections and spatial linkages of the transmission mechanism are greatly reduced, and more fixed connection methods are adopted between the components of the transmission mechanism, thereby preventing the influence of various environmental factors such as dust and freezing on the transmission mechanism, and avoiding problems such as poor electrical connection, mechanical jamming, and switch refusal to operate. The transmission mechanism is hidden inside the base 2, so dust and rain and snow are not likely to fall on the transmission mechanism, and the transmission mechanism is not easily corroded. The base 2 is made of stainless steel material with a uniform overall thickness and has strong stability. A high-protection insulating sleeve is added to the conductive contact part of the disconnector to prevent corrosive dust and chemical gases from eroding the conduction, protect the pressure spring from the influence of freezing and dust, and improve the reliability of the disconnector.

Claims

1. A high-protection isolating switch for rail transit lines, comprising an isolating switch body, the isolating switch body having a support insulator and a switch blade, the bottom of the isolating switch body having a base, characterized in that: The base is provided with a transmission mechanism inside, and the transmission mechanism includes a driving shaft, a driven shaft, a driving crank arm, a connecting piece, a first driven crank arm and a second driven crank arm, the driving shaft is connected to the output shaft of the operating mechanism through a reversing transmission unit, the driving shaft and the driven shaft are both rotatably mounted inside the base, one end of the driving crank arm is fixed on the outer wall of the driving shaft, one end of the first driven crank arm is fixed on the driven shaft, one end of the connecting piece is hingedly connected to the other end of the driving crank arm, the other end of the connecting piece is hingedly connected to the other end of the first driven crank arm, one end of the second driven crank arm is fixed on the driven shaft, the other end of the second driven crank arm is hingedly connected to the lower end of the support insulator, and the upper end of the support insulator is hingedly connected to the knife switch; The top of the base is provided with a through hole, and the other end of the second driven crank arm passes through the through hole to lift the support insulator upward to realize the opening of the disconnector; the conductive contact part of the disconnector is provided with an insulating sleeve; a protective cover is provided between the lower end of the support insulator and the upper surface of the base, the upper end of the protective cover wraps the lower end of the support insulator, and the lower end of the protective cover is in contact and fixed with the upper surface of the base outside the through hole.

2. A high protection isolating switch for rail transit lines according to claim 1, characterized in that: A driving bevel gear is fixed on the output shaft of the operating mechanism, a driven bevel gear is fixed on the driving rotating shaft, and the driving bevel gear is meshed with the driven bevel gear.

3. A high protection isolating switch for rail transit lines according to claim 1, characterized in that: A worm is fixed on the output shaft of the operating mechanism, a worm wheel is fixed on the active rotating shaft, and the worm is meshed with the worm wheel.

4. A high protection isolating switch for rail transit lines according to claim 1, characterized in that: The other end of the active crank arm, the other end of the first driven crank arm and the other end of the second driven crank arm are all fixed with pin shafts, the end of the connecting piece is hingedly connected to the corresponding pin shafts on the active crank arm and the first driven crank arm, and the lower end of the support insulator is hingedly connected to the corresponding pin shaft on the second driven crank arm.

5. A high protection isolating switch for rail transit lines according to claim 4, characterized in that: The connecting member comprises two connecting rods arranged in parallel, and the other end of the active crank arm and the other end of the first driven crank arm are both located between the two connecting rods.

6. A high protection isolating switch for rail transit lines according to claim 1, characterized in that: The base is a ""-shaped" structure.

7. A high protection isolating switch for rail transit lines according to claim 1, characterized in that: The ends of the driving rotating shaft and the driven rotating shaft are both rotatably mounted on a mounting plate, and the mounting plate is fixed to the inner wall of the base through a bolt assembly.

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