Double-fracture isolating switch for 145kV GIS (Gas Insulated Switchgear)

Abstract

The utility model relates to a double-fracture isolating switch for a 145kV GIS (Gas Insulated Switchgear), which comprises a shell, a sealed cabin is formed in the shell, an isolating fracture switch device is arranged in the sealed cabin, and the isolating fracture switch device comprises a static contact seat I and a static contact seat II which are transversely spaced and vertically arranged. The moving contact I and the moving contact II are located between the static contact seat I and the static contact seat II, and the moving contact I and the moving contact II are opposite to the static contact seat I. An isolation fracture I is formed between the moving contact I and the static contact seat I. An isolation fracture II is formed between the moving contact II and the static contact seat II. The moving contact I and the moving contact II are installed in a cabin transversely formed in the moving contact seat in a sliding mode through a gear and rack driving mechanism, and the gear and rack driving mechanism can drive the moving contact I and the moving contact II to synchronously move back to back or face to face when rotating forwards or reversely, so that the isolation fracture I and the isolation fracture II are connected or disconnected at the same time. The two fractures are independent, the voltage borne by the fractures is reduced, and the insulating property and the breaking capacity are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of disconnectors, in particular to a double-break disconnector for a 145kV GIS. Background Art

[0002] With the rapid development of the power industry, the requirements for the safety and reliability of high-voltage electrical equipment are constantly increasing. As one of the important switchgear in the power system, the performance of the isolating switch directly affects the safety and stable operation of the power system. Traditional isolating switches with voltage levels below 145kV usually adopt a single-break design. Although it can meet general requirements, in some special occasions, if higher insulation strength is required, especially in the case of non-stop expansion, the insulation performance of the single break cannot meet the requirements. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a double-break disconnector for a 145kV GIS, which reduces the voltage borne by the breaks, improves the insulation performance, can withstand a larger current, and increases the disconnection capacity.

[0004] The utility model is realized through the following technical solutions:

[0005] Provided is a double-break disconnector for 145kV GIS, comprising a shell, a sealed cabin formed in the shell, an isolating break switch device installed in the sealed cabin, the isolating break switch device comprising a static contact seat I and a static contact seat II which are laterally spaced and arranged up and down, and a moving contact I and a moving contact II which are located between the two and are respectively opposite to the static contact seat I and the static contact seat II, an isolating break I is formed between the moving contact I and the static contact seat I, and an isolating break II is formed between the moving contact II and the static contact seat II, the moving contact I and the moving contact II are slidably installed in a cabin laterally opened in the moving contact seat through a gear rack driving mechanism, and the gear rack driving mechanism can drive the moving contact I and the moving contact II to move synchronously in the opposite direction or towards each other when rotating in the forward or reverse direction, so that the isolating break I and the isolating break II are simultaneously turned on or off.

[0006] Furthermore, the rack and pinion drive mechanism includes a gear rotatably mounted in the vertical plane of the cabin and located between the moving contact I and the moving contact II, and an upper rack and a lower rack laterally arranged above and below the gear and meshing with the gear, respectively, the lower rack being connected to the end of the moving contact I, and the upper rack being connected to the end of the moving contact II.

[0007] Furthermore, a driving shaft is arranged at the center of the gear, and the driving shaft is connected to a driving motor or an operating handle.

[0008] Furthermore, the static contact seat I is connected to the conductor and is installed on the left side of the sealed cabin through the vertically arranged pot-type insulator I, and the static contact seat II is connected to the conductor and is installed on the right side of the sealed cabin through the horizontally arranged pot-type insulator II.

[0009] Furthermore, the moving contact seat is installed between the stationary contact seat I and the stationary contact seat II through a supporting insulator connected to the bottom wall of the sealed compartment.

[0010] Furthermore, an auxiliary grounding switch device is installed above the isolating break switch device in the sealed cabin. The auxiliary grounding switch device includes a grounding moving contact, an operating mechanism and a grounding static contact seat. The grounding static contact seat is arranged on the moving contact seat and is directly opposite to the grounding moving contact.

[0011] Furthermore, the sealed cabin is provided with expansion interfaces at the upper and lower parts of the static contact seat II and the upper and lower interfaces are sealed.

[0012] An expansion interface is reserved on the sealed cabin to provide protection for subsequent equipment expansion without power outage.

[0013] Preferably, the moving contact is made of copper-tungsten alloy material.

[0014] The use of high-quality copper-tungsten alloy material increases the ablation resistance of the contacts and extends the service life of the equipment.

[0015] Beneficial effects of the utility model:

[0016] The double-break disconnector of the utility model has two isolation breaks, and the two breaks are independent of each other, which reduces the voltage borne by the breaks, improves the insulation performance, and provides double insulation protection for the subsequent expansion of equipment without power outage; the double-break design enables the disconnector to withstand a larger current when disconnecting the circuit, thereby improving the disconnection capacity; the operation mode is relatively flexible, and a variety of manual or electric operation modes can be used to drive two racks to drive two moving contacts to move synchronously to achieve disconnection and conduction, thereby meeting the needs of different occasions; the moving contacts are made of high-quality copper-tungsten alloy material, which increases the ablation resistance of the contacts and prolongs the service life of the equipment.

[0017] The utility model has safe and reliable overall performance, flexible operation and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0020] As shown in the figure:

[0021] 1—housing, 2—pot insulator I, 3—static contact seat I, 4—moving contact seat, 5—moving contact I, 6—gear rack drive mechanism, 61—gear, 62—upper rack, 63—lower rack, 7—moving contact II, 8—support insulator, 9—static contact seat II, 10—conductor, 11—grounding moving contact, 12—grounding switch mechanism, 13—grounding static contact seat, 14—sealed chamber, 15—pot insulator II, 16—isolating break I, 17—isolating break II, 18, expansion interface. DETAILED DESCRIPTION

[0022] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0023] A double-break disconnector for 145kV GIS comprises a shell 1, a sealed cabin 14 is formed in the shell 1, an isolating break switch device is installed in the sealed cabin 14, the isolating break switch device comprises a static contact seat I3 and a static contact seat II9 which are laterally spaced and arranged up and down, and a moving contact I5 and a moving contact II7 which are located therebetween and are respectively opposite to the static contact seat I3, the static contact seat I3 is connected to a conductor 10 and is installed on the left side of the sealed cabin 14 through a vertically arranged pot insulator I2, and the static contact seat II9 is ​​connected to the conductor 10 and is installed on the right side of the sealed cabin 14 through a laterally arranged pot insulator II15.

[0024] An isolating break I16 is formed between the moving contact I5 and the stationary contact seat I3, and an isolating break II17 is formed between the moving contact II7 and the stationary contact seat II9. The moving contact I5 and the moving contact II7 are slidably installed in a cabin horizontally opened in the moving contact seat 4 through a gear rack drive mechanism 6. The moving contact seat 4 is installed between the stationary contact seat I3 and the stationary contact seat II9 through a supporting insulator 8 connected to the bottom wall of the sealed cabin 14. The moving contact is a moving contact made of copper-tungsten alloy.

[0025] When the rack and pinion driving mechanism 6 rotates forward or reversely, it can drive the moving contact I5 and the moving contact II7 to move synchronously in the opposite direction or towards each other, so that the isolating break I16 and the isolating break II17 are turned on or off at the same time.

[0026] The rack and pinion drive mechanism 6 includes a gear 61 rotatably mounted in the vertical plane of the cabin and located between the moving contact I5 and the moving contact II7, and an upper rack 62 and a lower rack 63 which are laterally arranged above and below the gear 61 and mesh with the gears, respectively. The lower rack 63 is connected to the end of the moving contact I5, and the upper rack 62 is connected to the end of the moving contact II7.

[0027] A driving shaft is provided at the center of the gear 61, and the driving shaft is connected to a driving motor or an operating handle. In order to facilitate the driving of the gear 61 and complete disconnection and connection, a driving motor can generally be selected to connect the driving shaft, which can be electrically controlled to save effort, or an operating handle can be used for manual operation to ensure stability.

[0028] An auxiliary grounding switch device is also installed above the isolating break switch device in the sealed cabin 14. The auxiliary grounding switch device includes a grounding moving contact 11, an operating mechanism 12 and a grounding static contact seat 13. The grounding static contact seat 13 is arranged on the moving contact seat 4 and is opposite to the grounding moving contact 11.

[0029] The sealed cabin 14 is provided with expansion interfaces 18 above and below the static contact seat II9 and seals the upper and lower interfaces.

[0030] In the utility model, the rack and pinion drive mechanism 6 can drive the upper rack 62 and the lower rack 63 to move toward or away from each other synchronously through the forward and reverse rotation of the gear 61, thereby pulling the moving contact I5 and the moving contact II7 to move toward or away from each other synchronously, thereby realizing the distance or contact between the moving contact and the static contact seat, thereby realizing the disconnection or conduction of the isolating switch at the isolating fracture I16 and the isolating fracture II17.

[0031] This new type of N2 / SF6 environmentally friendly gas-enclosed switchgear used for voltage levels of 145kV and below has a double-break disconnector with two isolation breaks. The two breaks are independent of each other, which reduces the voltage borne by the breaks and improves the insulation performance, providing double insulation protection for the subsequent expansion of equipment without power outages. The double-break design enables the disconnector to withstand a larger current when disconnecting the circuit, thereby improving the disconnection capacity. The operation mode is relatively flexible, and manual or electric operation modes can be used to meet the needs of different occasions. The moving contact is made of high-quality copper-tungsten alloy material, which increases the contact's ablation resistance and extends the service life of the equipment.

[0032] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A double-break disconnector for 145kV GIS, comprising a housing, a sealed compartment formed in the housing, and an isolating break switch device installed in the sealed compartment, characterized in that: The isolating break switch device includes a static contact seat I and a static contact seat II which are laterally spaced and arranged up and down, and a moving contact I and a moving contact II which are located between the two and are respectively opposite to the static contact seat I and the static contact seat II. An isolating break I is formed between the moving contact I and the static contact seat I, and an isolating break II is formed between the moving contact II and the static contact seat II. The moving contact I and the moving contact II are slidably installed in a cabin laterally opened in the moving contact seat through a gear rack driving mechanism. When the gear rack driving mechanism rotates forward or reversely, it can drive the moving contact I and the moving contact II to move synchronously in the opposite direction or towards each other, so that the isolating break I and the isolating break II are simultaneously turned on or off.

2. The 145kV GIS double-break disconnector according to claim 1, characterized in that: The rack and pinion drive mechanism includes a gear rotatably mounted in the vertical plane of the cabin and located between the moving contact I and the moving contact II, and an upper rack and a lower rack laterally arranged above and below the gear and meshing with the gear, the lower rack being connected to the end of the moving contact I, and the upper rack being connected to the end of the moving contact II.

3. The 145kV GIS double-break disconnector according to claim 2 is characterized in that: A driving shaft is arranged at the center of the gear, and the driving shaft is connected to a driving motor or an operating handle.

4. The 145kV GIS double-break disconnector according to claim 1, characterized in that: The static contact seat I is connected to the conductor and is installed on the left side of the sealed cabin through the vertically arranged pot insulator I, and the static contact seat II is connected to the conductor and is installed on the right side of the sealed cabin through the horizontally arranged pot insulator II.

5. The 145kV GIS double-break disconnector according to claim 1, characterized in that: The moving contact seat is installed between the stationary contact seat I and the stationary contact seat II through a supporting insulator connected to the bottom wall of the sealed compartment.

6. The 145kV GIS double-break disconnector according to claim 1, characterized in that: An auxiliary grounding switch device is also installed above the isolating break switch device in the sealed cabin. The auxiliary grounding switch device includes a grounding moving contact, an operating mechanism and a grounding static contact seat. The grounding static contact seat is arranged on the moving contact seat and directly faces the grounding moving contact.

7. The 145kV GIS double-break disconnector according to claim 1, characterized in that: The sealed cabin is provided with expansion interfaces at the upper and lower parts of the static contact seat II and the upper and lower interfaces are sealed.

8. The 145kV GIS double-break disconnector according to claim 1, characterized in that: The moving contact is made of copper-tungsten alloy material.

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