Novel environment-friendly solid insulation fully-sealed miniaturized insulating cylinder

Abstract

The invention relates to circuit equipment, in particular to a novel environment-friendly solid insulation fully-sealed miniaturized insulating cylinder, which comprises a bus sleeve, an insulating cylinder main body and an incoming and outgoing line sleeve, and is characterized in that the bus sleeve, the insulating cylinder main body and the incoming and outgoing line sleeve are respectively formed by injection molding of insulating materials; the bus sleeve and the incoming and outgoing line sleeve are respectively connected with the insulating cylinder main body, a bus sleeve conductor and a vacuum arc-extinguishing chamber are arranged in the bus sleeve, an incoming and outgoing line sleeve conductor is arranged in the incoming and outgoing line sleeve, an isolating / grounding switch is arranged in the insulating cylinder main body, and the vacuum arc-extinguishing chamber is arranged in the insulating cylinder main body. The bus sleeve and the incoming and outgoing line sleeve are made of polycarbonate in an injection molding mode, and the insulating cylinder body is made of polycarbonate and glass fibers in an injection molding mode. A modular structure is adopted, the production process control difficulty is low, and the finished product percent of pass is high.

Description

Technical Field

[0001] The invention relates to a circuit device, in particular to a novel environment-friendly solid insulation fully sealed miniaturized insulation cylinder. Background Art

[0002] In the prior art, 10kV ring network cabinets mainly use SF6 gas insulation or solid insulation. In traditional solid insulation switchgear, the insulation cylinder adopts a common box type or a three-phase insulation cylinder split structure. The vacuum interrupter, busbar bushing insert, and outlet bushing insert are cast together as one. The mold required for casting is relatively large and the structure is relatively complex. The tonnage of the casting machine is relatively high, and the process control requirements are high. If there are local problems during the casting process, the associated inserts and vacuum interrupters may be scrapped. The qualified rate of the cast finished product is relatively low, and the cost is relatively high. In addition, the casting material is epoxy resin. During the synthesis of epoxy resin, certain wastewater and waste gas are generated, which pollutes the environment. The molding process takes a long time, and the heating and insulation energy consumption during the molding process is high. The high cross-linked structure formed by epoxy resin casting is easy to crack, brittle, insoluble, and cannot be recycled during use, becoming a "stubborn" garbage of nature. It can only be recycled by landfill, crushing, or high temperature / high pressure oxidation, which pollutes the environment seriously. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a new type of environmentally friendly solid insulation fully sealed miniaturized insulation cylinder with a modular structure, low difficulty in production process control and high finished product qualification rate.

[0004] In order to solve the above technical problems, this application provides the following technical solutions:

[0005] The present invention discloses a novel environment-friendly solid-insulated fully-sealed miniaturized insulating cylinder, comprising a busbar bushing, an insulating cylinder body, and an inlet and outlet line bushing. The busbar bushing, the insulating cylinder body, and the inlet and outlet line bushings are respectively injection-molded by insulating materials. The busbar bushing and the inlet and outlet line bushings are respectively connected to the insulating cylinder body. A busbar bushing conductor and a vacuum arc extinguishing chamber are arranged in the busbar bushing. An inlet and outlet line bushing conductor is arranged in the inlet and outlet line bushing. An isolating / earthing switch is arranged in the insulating cylinder body.

[0006] Furthermore, the busbar bushing and the inlet and outlet bushings are made of polycarbonate injection molding.

[0007] Furthermore, the insulating tube body is made of polycarbonate and glass fiber by injection molding, and the mass ratio of polycarbonate to glass fiber is 7:3.

[0008] Furthermore, a first mounting boss is provided at one end of the busbar bushing close to the insulating tube body, and the first mounting boss is a frustum of a cone whose diameter gradually decreases along the axial direction. A first mounting hole is provided on the insulating tube body, and the first mounting hole cooperates with the first mounting boss. The first mounting boss is inserted into the first mounting hole to connect the busbar bushing with the insulating tube body.

[0009] Furthermore, a positioning device is provided on the busbar bushing at a position close to the first mounting boss, and the positioning device is a radial ridge provided on the outer wall of the busbar bushing. When the first mounting boss extends into the mounting hole, the edge of the insulating tube body abuts against the positioning device.

[0010] Furthermore, a second mounting boss is provided at one end of the inlet and outlet line bushing close to the insulating tube body, and the second mounting boss is a frustum of a cone whose diameter gradually decreases along the axial direction. A second mounting hole is provided on the insulating tube body, and the second mounting boss extends into the second mounting hole to connect the inlet and outlet line bushing with the insulating tube body.

[0011] Furthermore, the busbar bushing conductor and the inlet and outlet bushing conductors are both molded from copper rods.

[0012] Furthermore, it also includes a first electric field shielding net, a second electric field shielding net, and a third electric field shielding net. The first electric field shielding net is arranged in the bus bushing, and the first electric field shielding net is sleeved outside the bus bushing conductor. The second electric field shielding net and the third electric field shielding net are both arranged in the incoming and outgoing line bushings, the second electric field shielding net is close to the connection between the incoming and outgoing line bushings and the insulating tube body, and the third electric field shielding net is close to the connection between the incoming and outgoing line bushings and the cable accessories.

[0013] Furthermore, the first electric field shielding net, the second electric field shielding net, and the third electric field shielding net are all made of brass.

[0014] Compared with the prior art, the novel environmentally friendly solid insulation fully sealed miniaturized insulation cylinder of the present invention has at least the following beneficial effects:

[0015] The novel environment-friendly solid-insulated fully-sealed miniaturized insulating cylinder of the present invention has a busbar bushing, an insulating cylinder body and an inlet and outlet line bushings that are respectively injection-molded by insulating materials, and the busbar bushing, the insulating cylinder body and the inlet and outlet line bushings are formed into three independent modules, thereby reducing the external dimensions of the injection mold, reducing the difficulty of designing the injection mold, solving the problem of large shrinkage of thermoplastic materials during molding, reducing the difficulty of controlling the production process, and using a smaller casting machine to complete the casting process, with a high qualified rate of finished products and low production cost; using a modular design, reducing the external dimensions of the mold and the difficulty of mold design, solving the problem of large shrinkage of thermoplastic materials during molding, reducing the difficulty of controlling the production process, and using a small casting machine to complete the production, with a high qualified rate and low production cost.

[0016] The novel environment-friendly solid insulation fully sealed miniaturized insulation cylinder of the present invention is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the novel environmentally friendly solid insulation fully sealed miniaturized insulation cylinder of the present invention;

[0018] Figure 2 The figure is a schematic diagram of the separate structure of each module in the novel environmentally friendly solid insulation fully sealed miniaturized insulation cylinder of the present invention. DETAILED DESCRIPTION

[0019] like Figure 1 , Figure 2As shown, the present invention is a novel environmentally friendly solid insulation fully sealed miniaturized insulating cylinder, comprising a bus bushing 11, an insulating cylinder body 31, and an inlet and outlet bushing 41. The bus bushing 11, the insulating cylinder body 31, and the inlet and outlet bushing 41 are respectively injection molded by insulating materials. The bus bushing 11 and the inlet and outlet bushing 41 are respectively connected to the insulating cylinder body 31. The bus bushing 11 is provided with a bus bushing conductor 12 and a vacuum arc extinguishing chamber 21. The inlet and outlet bushing 41 is provided with an inlet and outlet bushing conductor 42. The insulating cylinder body 31 is provided with an isolating / earthing switch. Specifically, the outer dimensions of the busbar bushing 11 adopt the outer dimensions of the standard bushing and can be used in conjunction with a standard busbar. The busbar bushing conductor 12 is injection molded in the busbar bushing 11, and the busbar bushing conductor 12 is used for current diversion of the main circuit. An isolating / earthing switch is arranged in the inner cavity of the insulating tube body 31 to isolate the isolating / earthing switch from the outside. The outer dimensions of the inlet and outlet bushings 41 adopt the outer dimensions of the standard bushing, and the inlet and outlet bushings 41 can be used in conjunction with a standard cable. The inlet and outlet bushing conductors 42 are injection molded in the inlet and outlet bushings 41, and the inlet and outlet bushing conductors 42 are used for current diversion of the main circuit. The vacuum arc extinguishing chamber 21 encapsulates the moving and static contacts and other components into a closed vacuum chamber through a vacuum brazing process, and utilizes the excellent insulation and arc extinguishing performance of the vacuum in the vacuum chamber to achieve circuit connection and disconnection. The busbar bushing conductor 12 is fixedly connected to the static end of the vacuum arc extinguishing chamber 21 by bolts, the vacuum arc extinguishing chamber 21 is injection molded in the busbar bushing 11, and the inlet and outlet bushing conductor 42 is connected to the insulating tube body 31 by multiple bolts. The new environmentally friendly solid insulation fully sealed miniaturized insulating tube of the present invention, since the busbar bushing 11, the insulating tube body 31, and the inlet and outlet bushings 41 are respectively injection molded by insulating materials, the busbar bushing 11, the insulating tube body 31, and the inlet and outlet bushings 41 are divided into three independent modules for molding, which reduces the outer dimensions of the injection mold, reduces the difficulty of injection mold design, solves the problem of large shrinkage of thermoplastic materials, reduces the difficulty of production process control, and uses a smaller casting machine to complete the casting process, with a high qualified rate of finished products and low production costs; the modular design is adopted to reduce the outer dimensions of the mold and the difficulty of mold design, solves the problem of large shrinkage of thermoplastic materials, reduces the difficulty of production process control, and a small casting machine can be used to complete the production, with a high qualified rate and low production costs.

[0020] Optionally, the busbar bushing 11 and the inlet and outlet bushings 41 are made of polycarbonate (PC) injection molding. The molding process is fast and can be completed within 90 seconds. In addition, the heating and insulation time during the product molding process is short, the casting efficiency is high, the pollution during the material synthesis process is small, the energy consumption is low, the material can be recycled, and the environmental pollution is small.

[0021] Optionally, the insulating tube body 31 is made of polycarbonate and glass fiber by injection molding, and the mass ratio of polycarbonate to glass fiber is 7:3, so as to improve the strength of the insulating tube body 31 .

[0022] Optionally, a first mounting boss 111 is provided at one end of the busbar bushing 11 close to the insulating cylinder body 31. The first mounting boss 111 is a truncated cone with a gradually decreasing axial diameter. A first mounting hole 311 is provided on the insulating cylinder body 31. The first mounting hole 311 matches the first mounting boss 111. The first mounting boss 111 extends into the first mounting hole 311 to connect the busbar bushing 11 with the insulating cylinder body 31. The first mounting boss 111 is provided as a truncated cone with a gradually decreasing axial diameter, so that the busbar bushing 11 and the insulating cylinder body 31 are more convenient and labor-saving to assemble. A sealing ring is directly provided on the joint surface between the first mounting boss 111 and the first mounting hole 311, and the sealing performance is good.

[0023] Optionally, a positioning device 112 is provided on the busbar bushing 11 near the first mounting boss 111 . The positioning device 112 is a radial ridge provided on the outer wall of the busbar bushing. When the first mounting boss 111 extends into the mounting hole 311 , the edge of the insulating tube body 31 abuts against the positioning device 112 .

[0024] A second mounting boss 411 is provided at one end of the inlet and outlet sleeve 41 close to the insulating tube body 31. The second mounting boss 411 is a frustum of a cone whose diameter gradually decreases along the axial direction. A second mounting hole 312 is provided on the insulating tube body 31. The second mounting hole 312 cooperates with the second mounting boss 411. The second mounting boss 411 extends into the second mounting hole 312 to connect the inlet and outlet sleeve 41 with the insulating tube body 31.

[0025] Optionally, the busbar bushing conductor 12 and the inlet and outlet bushing conductor 42 are both molded from copper rods. Specifically, the busbar bushing conductor 12 and the inlet and outlet bushing conductor 42 are both molded from copper rods with a diameter of 24 mm.

[0026] Optionally, it also includes a first electric field shielding net 51, a second electric field shielding net 52, and a third electric field shielding net 53. The first electric field shielding net 51 is arranged in the bus bushing 11, and the first electric field shielding net 51 is sleeved outside the bus bushing conductor 12. The first electric field shielding net 51 is used to balance the electric field at the junction of the bus bushing 11 and the bus accessories. The second electric field shielding net 52 and the third electric field shielding net 53 are both arranged in the incoming and outgoing line bushings 41. The second electric field shielding net 52 is close to the connection between the incoming and outgoing line bushings 41 and the insulating tube body 31. The second electric field shielding net 52 is used to balance the electric field at the junction of the incoming and outgoing line bushings 41 and the insulating tube body 31; the third electric field shielding net 53 is close to the connection between the incoming and outgoing line bushings 41 and the cable accessories, and is used to balance the electric field at the junction of the incoming and outgoing line bushings 41 and the cable accessories.

[0027] Optionally, the first electric field shielding net 51, the second electric field shielding net 52, and the third electric field shielding net 53 are all made of brass. A brass wire with a diameter of 0.5 mm is formed by a mold.

[0028] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A novel environmentally friendly solid-insulated fully sealed miniaturized insulating cylinder, comprising a busbar bushing (11), an insulating cylinder body (31), and an inlet and outlet bushing (41), characterized in that: The busbar bushing (11), the insulating tube body (31), and the inlet and outlet bushings (41) are respectively injection-molded with insulating materials; the busbar bushing (11) and the inlet and outlet bushings (41) are respectively connected to the insulating tube body (31); a busbar bushing conductor (12) and a vacuum arc extinguishing chamber (21) are arranged in the busbar bushing (11); an inlet and outlet bushing conductor (42) is arranged in the inlet and outlet bushings (41); and an isolating / earthing switch is arranged in the insulating tube body (31).

2. The new environmentally friendly solid insulation fully sealed miniaturized insulation cylinder according to claim 1 is characterized in that: The busbar bushing (11) and the inlet and outlet bushings (41) are made of polycarbonate injection molding.

3. The new environmentally friendly solid insulation fully sealed miniaturized insulation cylinder according to claim 1 is characterized in that: The insulating tube body (31) is injection-molded by polycarbonate and glass fiber, and the mass ratio of polycarbonate to glass fiber is 7:

3.

4. The new environmentally friendly solid insulation fully sealed miniaturized insulation cylinder according to claim 1 is characterized in that: A first mounting boss (111) is provided at one end of the busbar bushing (11) close to the insulating tube body (31); the first mounting boss (111) is a truncated cone whose diameter gradually decreases along the axial direction; a first mounting hole (311) is provided on the insulating tube body (31); the first mounting hole (311) cooperates with the first mounting boss (111); the first mounting boss (111) extends into the first mounting hole (311) to connect the busbar bushing (11) with the insulating tube body (31).

5. The new environmentally friendly solid insulation fully sealed miniaturized insulation cylinder according to claim 4 is characterized in that: A positioning device (112) is provided on the busbar bushing (11) at a position close to the first mounting boss (111); the positioning device (112) is a radial ridge provided on the outer wall of the busbar bushing (11); when the first mounting boss (111) extends into the mounting hole (311), the edge of the insulating tube body (31) abuts against the positioning device (112).

6. The new environmentally friendly solid insulation fully sealed miniaturized insulation cylinder according to claim 1 is characterized in that: A second mounting boss (411) is provided at one end of the inlet and outlet line bushing (41) close to the insulating tube body (31); the second mounting boss (411) is a truncated cone whose diameter gradually decreases along the axial direction; a second mounting hole (312) is provided on the insulating tube body (31); the second mounting boss (411) extends into the second mounting hole (312) to connect the inlet and outlet line bushing (41) with the insulating tube body (31).

7. The new environmentally friendly solid insulation fully sealed miniaturized insulation cylinder according to claim 1 is characterized in that: The busbar bushing conductor (12) and the inlet and outlet bushing conductor (42) are both molded from copper rods.

8. The novel environmentally friendly solid insulation fully sealed miniaturized insulation cylinder according to any one of claims 1 to 7, characterized in that: The invention also comprises a first electric field shielding net (51), a second electric field shielding net (52), and a third electric field shielding net (53); the first electric field shielding net (51) is arranged in the bus bushing (11); the first electric field shielding net (51) is sleeved outside the bus bushing conductor (12); the second electric field shielding net (52) and the third electric field shielding net (53) are both arranged in the inlet and outlet bushings (41); the second electric field shielding net (52) is close to the connection between the inlet and outlet bushings (41) and the insulating tube body (31); and the third electric field shielding net (53) is close to the connection between the inlet and outlet bushings (41) and the cable accessories.

9. The novel environmentally friendly solid insulation fully sealed miniaturized insulation cylinder according to claim 8 is characterized in that: The first electric field shielding net (51), the second electric field shielding net (52) and the third electric field shielding net (53) are all made of brass.

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