CN107359536A - Environmental protection gas insulated ring network cabinet - Google Patents

Abstract

The invention relates to the technical field of power system distribution network switchgear, in particular to an environment-friendly gas-insulated ring network cabinet, which has an upper cabinet body, a lower cabinet body, and a lower outgoing cable head for connecting the two; the upper cabinet body includes a gas box And the electrical box, the gas box is a closed box and the inside is filled with nitrogen, the inside of the gas box is equipped with a switch unit, and the inside of the electrical box is equipped with a load switch mechanism and a three-station isolating switch mechanism; the three-station isolating switch mechanism passes through the switch The mechanism operating shaft of the unit and the transmission plate of the switch unit drive the isolation knife of the switch unit to swing; the load switch mechanism drives the vacuum bubble of the switch unit to separate and close through the insulating pull rod of the switch unit. The insulated ring network cabinet has good environmental protection, safety and reliability.

Description

Environmental protection gas insulated ring network cabinet

technical field

The invention relates to the technical field of power system distribution network switchgear, in particular to an environment-friendly gas-insulated ring main unit.

Background technique

At present, most of the gas-insulated ring network cabinets on the market use SF6 gas as the medium, and SF6 gas is listed as a greenhouse gas to limit emissions by the "Kyoto Protocol". In recent years, some countries have even imposed carbon taxes on the use of SF6. Therefore, for switchgear, especially for medium-voltage switchgear, removing SF6 has important environmental protection significance.

Contents of the invention

The technical problem to be solved by the present invention is to provide a safe and reliable environment-friendly gas-insulated ring network cabinet in order to overcome the deficiencies in the prior art.

The technical solution adopted by the present invention to solve the technical problem is: the environment-friendly gas insulated ring network cabinet has an upper cabinet body, a lower cabinet body and a lower outlet cable head for connecting the two; the upper cabinet body includes a gas box and an electrical box, The gas box is a closed box and filled with nitrogen gas inside. There is a switch unit inside the gas box, and a load switch mechanism and a three-position isolating switch mechanism inside the electrical box. The switch unit includes upper outlet cable heads, integrated busbars, Drive plate support, drive plate, vacuum bubble for grounding and closing of load-carrying circuits, insulating rods, connecting rods, solid-sealed poles, grounding knife holders, mechanism operating shafts, isolation knives, and isolation knife holders; the number of upper outgoing cable heads There are three and distributed on the top of the air box in a line along the front and rear direction; the transmission plate is installed between the two transmission plate brackets set in pairs, and the grounding knife seat and the isolation knife seat are installed on the side of the air box. The two are relatively distributed. The integrated busbar is installed at the bottom of the two drive plate brackets. The number of isolation knives is three and distributed in the air box along the front and rear directions. One end of each isolation knives is hinged on the grounding knife seat The other end is hinged on the isolation knife seat, and the isolation knife is between the transmission plate and the integrated busbar; the mechanism operation shaft is installed on one of the transmission plate brackets, and the other end of the mechanism operation shaft is connected to the three-position isolation switch. The structure is connected; the number of solid-sealed poles is three, and they are arranged in a line along the left and right directions in the gas box. The other end is connected to the bottom of the air box, the vacuum bubble, insulating rod and connecting rod are all located inside the solid-sealed pole, and one end of the insulating rod is connected to the load switch mechanism, and the other end is connected to the vacuum bubble. The other end of the bubble is connected to the connecting rod, and the other end of the connecting rod is connected to the cable head of the lower outlet; the three-position isolating switch mechanism drives the isolation knife to swing through the mechanism operating shaft and the transmission plate; the load switch mechanism drives the vacuum bubble through the insulating pull rod Split and combine.

More specifically, in the above technical solution, the integrated busbar includes the first busbar, the second busbar, the third busbar and epoxy resin, the first busbar, the second busbar and the third busbar They are all ring structures, and the first busbar, the second busbar and the third busbar are arranged in the high-voltage switchgear in the way of front, middle and rear, and are integrally cast and sealed with epoxy resin.

More specifically, in the above technical solution, at least one annular boss is provided on the periphery of the first bus bar, the second bus bar and the third bus bar.

More specifically, in the above technical solution, the middle part of the epoxy resin is provided with three fixing holes connected to the three solidified poles, and each fixing hole has a skirt.

The beneficial effects of the present invention are: the environment-friendly gas-insulated ring main unit of the present invention has the following advantages:

1. Nitrogen is used as the medium, which has good environmental protection effect, does not cause greenhouse effect, and complies with relevant national regulations;

2. The main conductive circuit is all sealed in a closed air box, and the airtight box is filled with dry and pure nitrogen gas, which avoids the occurrence of condensation problems and greatly improves the safety of the switchgear; in addition, through the fully enclosed design, the ring network cabinet Small in size, it isolates water vapor, oil and dust, and further improves its insulation performance; at the same time, because the main conductive circuit is sealed in a closed box, the main conductive circuit can be maintenance-free, greatly reducing equipment operation and maintenance costs;

3. Adopting the way of upper isolation, as an independent incoming or outgoing unit, the grounding and closing of the vacuum bubble bearing circuit is safe and reliable, and the grounding and closing ability is greatly improved;

4. The layout of the front, middle and rear of the three busbars is different from the existing left, middle and right layout, which can effectively reduce the size in the width direction, the layout structure is more compact, and the volume is reduced, which also solves the " Insufficient safety distance for small cabinets” problem; the three are integrally poured with epoxy resin to reduce the use of copper bars, save manufacturing costs, and reduce heat generation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is a structural schematic diagram 1 of an integrated busbar;

Fig. 4 is a schematic structural diagram 2 of an integrated busbar.

The labels in the figure are: 1. Lower cabinet body; 2. Lower outlet cable head; 3. Switch unit; 4. Load switch mechanism; 5. Three-position isolating switch mechanism; 3-1. Upper outlet cable head; 3- 2. Integrated busbar; 3-3. Drive plate bracket; 3-4. Drive plate; 3-5. Vacuum bubble; 3-6. Insulated tie rod; 3-7. Connecting rod; 3-8. Solid-sealed pole ; 3-9, grounding knife seat; 3-10, mechanism operating shaft; 3-11, isolation knife; 3-12, isolation knife seat; 3-2-1, first busbar; 3-2-2, second Second busbar; 3-2-3, third busbar; 3-2-4, epoxy resin; 3-2-5, annular boss; 3-2-6, fixing hole; 3-2-7, skirt.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figures 1-2, the environmentally friendly gas-insulated ring network cabinet has an upper cabinet body, a lower cabinet body 1, and a lower outlet cable head 2 for connecting the two. The lower outlet cable head 2 is L-shaped. The upper cabinet includes an air box and an electrical box. The air box adopts a modular assembly method. The air box is a closed box and is filled with 0.13Mpa nitrogen inside. Using nitrogen as the medium, the environmental protection effect is good and does not cause greenhouse effect, which meets the relevant national regulations. . The air box is welded with 2.5mm stainless steel, the inside of the air box is provided with a switch unit 3, the inside of the electrical box is provided with a load switch mechanism 4 and a three-position isolating switch mechanism 5, and the load switch mechanism 4 and the three-position isolating switch The mechanisms 5 are independent of each other, and the three-position isolating switch mechanism 5 is located above the load switch mechanism 4 . The switch unit 3 includes an upper outlet cable head 3-1, an integrated bus bar 3-2, a transmission plate bracket 3-3, a transmission plate 3-4, a vacuum bubble 3-5 for carrying circuit grounding and closing, and an insulating pull rod 3- 6. Connecting rod 3-7, solid-sealed pole 3-8, grounding knife seat 3-9, mechanism operating shaft 3-10, isolation knife 3-11 and isolation knife seat 3-12. The upper outgoing cable head 1 adopts the combination of the contact and the cable head, and is installed on the top of the air box through the seal and pushed out. top of the airbox. The transmission plate 3-4 is installed between the two transmission plate supports 3-3 arranged in pairs, the grounding knife holder 3-9 and the isolation knife holder 3-12 are all installed on the side of the air box and both are relatively distributed, integrated The chemical bus bar 3-2 is installed on the bottom of the two drive plate supports 3-3, and the quantity of the isolating knives 3-11 is three and arranged in a row along the front and rear directions in the air box, and each isolating knife 3-11 One end is hinged on the grounding knife seat 3-9, and the other end is hinged on the isolation knife seat 3-12, and the isolation knife 3-11 is interposed between the transmission plate 3-4 and the integrated busbar 3-2. The mechanism operating shaft 3-10 is installed on one of the transmission plate supports 3-3, and the other end of the mechanism operating shaft 3-10 is connected with the three-position isolating switch mechanism 5. The three-station knife switch adopts an upper isolation method and a pouring structure. The number of embedded poles 3-8 is three, and they are arranged in a line along the left and right directions in the gas box. The embedded poles 3-8 are located at the bottom of the integrated bus bar 3-2, and the embedded poles 3-8 One end of the air box is connected to the end face of the gas box by an O-ring, and the other end is connected to the bottom of the gas box. , and one end of the insulating pull rod 3-6 is connected with the load switch mechanism 4, the other end is connected with the vacuum bubble 3-5, and the other end of the vacuum bubble 3-5 is connected with the connecting rod 3-7, and the connecting rod 3 The other end of -7 is connected with the lower outlet cable head 2. The end of the solid-sealed pole 3-8 connected to the bottom of the gas box has a tapered structure, and the lower outgoing cable head 2 can be more quickly connected to the tapered structure, and the lower outgoing cable head 2 and the solid-sealed pole 3- 8 It is connected with a built-in silicon rubber ring to ensure the airtightness and insulation strength of the gas box as a whole. The three-position isolation switch mechanism 5 drives the isolation knife 3-11 to swing through the mechanism operation shaft 3-10 and the transmission plate 3-4; the load switch mechanism 4 drives the vacuum bubble 3-5 to separate and close through the insulating pull rod 3-6.

As shown in Figures 3-4, the integrated busbar 3-2 includes a first busbar 3-2-1, a second busbar 3-2-2, a third busbar 3-2-3 and epoxy resin 3-2- 4. The first busbar 3-2-1, the second busbar 3-2-2 and the third busbar 3-2-3 are all ring structures, and the first busbar 3-2-1, the second busbar The row 3-2-2 and the third busbar 3-2-3 are set in the high-voltage switchgear in the way of front, middle and rear arrangement, and are integrally cast and sealed by epoxy resin 3-2-4. At least one annular boss 3-2-5 is provided on the periphery of the first busbar 3-2-1, the second busbar 3-2-2 and the third busbar 3-2-3, that is, between phase and phase Between set up annular boss 3-2-5 to increase creep distance. The middle part of the epoxy resin 3-2-4 is provided with three fixing holes 3-2-6 connected with the three solid-sealed poles 3-8, and each fixing hole 3-2-6 has a skirt 3-2-7, Guaranteed electrical clearance. Around the epoxy resin 3-2-4, there are several pouring holes connected and fixed with the air box.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (4)

1. environmentally friendly gas-insulated ring network cabinet, it is characterised in that：With upper wardrobe body, lower cabinet body (1) and for connecting under both Outlet cable head (2)；Upper wardrobe body includes gas tank and electric appliance box, and gas tank is containment housing and inside is filled with nitrogen, the inside of gas tank Switch element (3) is provided with, electric appliance box is internally provided with on-load switch mechanism (4) and tri-station isolating switch mechanism (5)；

Switch element (3) includes upper outlet cable head (3-1), integrated bus (3-2), transmission board mount (3-3), driver plate (3-4), for carry loop ground connection close vacuum bubbles (3-5), insulated tension pole (3-6), pitman (3-7), pole (3- 8) tool rest (3-9), mechanism operating shaft (3-10), isolation knife (3-11) and isolation tool rest (3-12), are grounded；Upper outlet cable head The quantity of (3-1) is three and the top in one line for being distributed in gas tank along the longitudinal direction；Driver plate (3-4) is arranged on and set in pairs Between the two transmission board mounts (3-3) put, ground connection tool rest (3-9) and isolation tool rest (3-12) are installed on the side of gas tank And both Relative distributions, integrated bus (3-2) are arranged on the bottom of two transmission board mounts (3-3), isolation knife (3-11) Quantity be three and it is in one line along the longitudinal direction be distributed in gas tank, one end of each isolation knife (3-11) is hinged on earthing On seat (3-9), the other end is hinged on isolation tool rest (3-12), and isolation knife (3-11) is between driver plate (3-4) and integrated mother Line (3-2) is between the two；On mechanism operating shaft (3-10) transmission board mount (3-3) installed therein, mechanism operating shaft (3- 10) the other end is connected with tri-station isolating switch mechanism (5)；The quantity of pole (3-8) is three and along right and left It is distributed in in one line in gas tank, pole (3-8) is located at the bottom of integrated bus (3-2), pole (3-8) One end is connected with the end face of gas tank, and the other end is connected with the bottom of gas tank, vacuum bubbles (3-5), insulated tension pole (3-6) and company Take over the baton (3-7) be respectively positioned on pole (3-8) inside, and one end of insulated tension pole (3-6) is connected with on-load switch mechanism (4) Connect, the other end is connected with vacuum bubbles (3-5), and the other end of vacuum bubbles (3-5) is connected with pitman (3-7), pitman (3- 7) the other end is connected with lower outlet cable head (2)；

Tri-station isolating switch mechanism (5) drives isolation knife (3-11) pendulum by mechanism operating shaft (3-10) and driver plate (3-4) It is dynamic；On-load switch mechanism (4) drives vacuum bubbles (3-5) to carry out division by insulated tension pole (3-6).

2. environmentally friendly gas-insulated ring network cabinet according to claim 1, it is characterised in that：Described integrated bus (3-2) Including the first busbar (3-2-1), the second busbar (3-2-2), the 3rd busbar (3-2-3) and epoxy resin (3-2-4), the first busbar (3-2-1), the second busbar (3-2-2) and the 3rd busbar (3-2-3) are loop configuration, and the first busbar (3-2-1), the second mother Row (3-2-2) and the 3rd busbar (3-2-3) three are arranged in high-tension switch gear and by ring in a manner of being arranged before, during and after Oxygen tree fat (3-2-4) formed by integrally casting sealing.

3. environmentally friendly gas-insulated ring network cabinet according to claim 2, it is characterised in that：Described the first busbar (3-2-1), The periphery of second busbar (3-2-2) and the 3rd busbar (3-2-3) is at least provided with one of annular boss (3-2-5).

4. environmentally friendly gas-insulated ring network cabinet according to claim 2, it is characterised in that：Described epoxy resin (3-2-4) Middle part be provided with three fixing holes (3-2-6) being connected with three poles (3-8), and each fixing hole (3-2-6) is equal With shirt rim (3-2-7).