High-voltage electrical equipment

Abstract

The utility model discloses high-voltage electrical equipment, and relates to the technical field of electrical equipment. The insulation protection device comprises a cabinet body. A circuit breaker; a disconnecting link pull rod; a post insulator; the main busbar, the first branch busbar, the second branch busbar, the third branch busbar, the fourth branch busbar, the isolation disconnecting link static contact, the wire outlet side isolation disconnecting link static contact, the isolation disconnecting link moving contact and the wire outlet side isolation disconnecting link moving contact are arranged in the cabinet body through post insulators; the periphery of the main busbar, the periphery of the first branch busbar, the periphery of the second branch busbar, the periphery of the third branch busbar and the periphery of the fourth branch busbar are each spirally wound with a silicone rubber self-adhesive tape to form an insulating layer, and the periphery of the supporting insulator and the periphery of the disconnecting link pull rod are each sprayed with a high-molecular silicon-fluorine coating. And the working efficiency of insulation strengthening operation is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, and more specifically, to a high-voltage electrical equipment. Background Art

[0002] Metallurgical enterprise equipment is affected by factors such as the external environment, high temperature, field forces, inherent defects or construction damage. It is more likely that the equipment insulation will deteriorate, which can easily cause electrical equipment failures and seriously affect the stable operation of hot line production. Therefore, it is generally necessary to strengthen the insulation performance. The means to strengthen the insulation performance are usually to install heat shrink sheaths and strengthen the insulation by spraying paint. However, the heat shrink sheath and insulation strengthening operations are time-consuming and labor-intensive. The smelting production line is in heavy-load continuous production, and the high-voltage electrical equipment does not have the conditions for long-term power outages and maintenance.

[0003] In summary, how to improve the insulation performance of equipment while improving work efficiency is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a high-voltage electrical device having good insulation performance and high efficiency in performing insulation reinforcement operations.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A high-voltage electrical equipment, comprising: a cabinet; a post insulator; a main busbar, a first branch busbar, a second branch busbar, a third branch busbar, a fourth branch busbar, an isolating knife switch static contact, and an outgoing line-side isolating knife switch static contact, which are mounted inside the cabinet via the post insulator; an isolating knife switch movable contact and an outgoing line-side isolating knife switch movable contact, which are arranged inside the cabinet and can swing via the post insulator; a circuit breaker mounted inside the cabinet; and a knife switch pull rod.

[0007] The first end of the first branch busbar is electrically connected to the main busbar, and the second end is electrically connected to the static contact of the isolation switch; the first end of the second branch busbar is electrically connected to the movable contact of the isolation switch, and the second end is electrically connected to the first end of the circuit breaker; the first end of the third branch busbar is electrically connected to the second end of the circuit breaker, and the second end is electrically connected to the static contact of the outgoing-side isolation switch; the fourth branch busbar is electrically connected to the movable contact of the outgoing-side isolation switch;

[0008] The knife switch pull rod is inserted into the interior of the cabinet and connected to the isolating knife switch moving contact, and is used to drive the isolating knife switch moving contact to contact or separate from the isolating knife switch static contact, and to drive the outgoing side isolating knife switch moving contact to contact or separate from the outgoing side isolating knife switch static contact;

[0009] The outer peripheries of the main busbar, the first branch busbar, the second branch busbar, the third branch busbar and the fourth branch busbar are spirally wound with silicone rubber self-adhesive tape to form an insulating layer, and the outer peripheries of the support insulators and the knife switch pull rods are sprayed with a polymer silicone-fluorine coating.

[0010] Preferably, the main busbar includes an A-phase main busbar, a B-phase main busbar, and a C-phase main busbar, and the first branch busbar, the second branch busbar, the third branch busbar, and the fourth branch busbar each include an A-phase branch busbar, a B-phase branch busbar, and a C-phase branch busbar;

[0011] The A-phase branch busbar, the B-phase branch busbar, and the C-phase branch busbar can be electrically connected to the A-phase main busbar, the B-phase main busbar, and the C-phase main busbar respectively;

[0012] The silicone rubber self-adhesive tape wrapped around the periphery of the A-phase branch busbar and the A-phase main busbar is a yellow tape;

[0013] The silicone rubber self-adhesive tape wrapped around the periphery of the B-phase branch busbar and the B-phase main busbar is a green tape;

[0014] The silicone rubber self-adhesive tape wrapped around the periphery of the C-phase branch busbar and the C-phase main busbar is a red tape.

[0015] Preferably, the helix angle of the silicone rubber self-adhesive tape is The winding spacing of the silicone rubber self-adhesive tape is 1 / 2 of its own width, and the thickness of the insulating layer is greater than or equal to 3 mm.

[0016] Preferably, the thickness of the polymer silicon-fluorine coating is greater than or equal to 1.5 mm.

[0017] Preferably, the inner cavity of the cabinet is divided into a front cavity and a rear cavity by a support frame;

[0018] The front chamber and the rear chamber are both provided with the corresponding main busbar, the first branch busbar, the isolation knife switch static contact and the isolation knife switch moving contact, and the first branch busbar is electrically connected to the corresponding main busbar and the corresponding isolation knife switch static contact;

[0019] The circuit breaker is arranged in the front chamber, the outgoing line side isolating knife switch moving contact and the outgoing line side isolating knife switch static contact are both arranged in the rear chamber, the support frame is provided with a first wall bushing, the third branch busbar passes through the first wall bushing to connect the second end of the circuit breaker and the outgoing line side isolating knife switch static contact, and the third branch busbar is inserted into the outer periphery of a portion of the structure of the first wall bushing, the inner wall of the first wall bushing is sprayed with the polymer silicone-fluorine coating, and the remaining outer periphery of the third branch busbar is wrapped with the silicone rubber self-adhesive tape;

[0020] The support frame has a mounting through hole, the hole wall of the mounting through hole is provided with the support insulator, the second branch busbar passes through the mounting through hole with the isolating knife switch moving contact in the rear chamber, and is connected to the support insulator in the mounting through hole.

[0021] Preferably, the two cabinets are arranged in parallel, and the corresponding support insulators, the main busbar, the first branch busbar, the second branch busbar, the third branch busbar, the fourth branch busbar, the isolating knife switch static contact, the outgoing line side isolating knife switch static contact, the isolating knife switch moving contact, the outgoing line side isolating knife switch moving contact and the circuit breaker are arranged in the two cabinets;

[0022] The sealing plate on the side close to the two cabinets is provided with a second wall sleeve and a third wall sleeve, the main busbars arranged in the two front chambers are inserted into the corresponding second wall sleeves, and the main busbars arranged in the two rear chambers are inserted into the corresponding third wall sleeves; the main busbars are inserted into the outer periphery of the part of the structure of the second wall sleeve and the third wall sleeve, and the inner walls of the second wall sleeve and the third wall sleeve are sprayed with the polymer silicone-fluorine coating.

[0023] Preferably, the main busbar is a double copper busbar structure, and the head end of one of the two layers of copper busbars is electrically connected to the tail end of the other.

[0024] Preferably, the main busbar, the first branch busbar, the isolating knife switch static contact, the isolating knife switch moving contact, the second branch busbar, the circuit breaker, the outgoing line side isolating knife switch static contact, and the outgoing line side isolating knife switch moving contact are arranged in sequence along the height direction of the cabinet, and the main busbar is located on the top side of the cabinet.

[0025] Preferably, the support frame extends along the width direction of the cabinet and is connected to the back panel and panel of the cabinet, the main busbar extends along the width direction of the cabinet, and the static contact of the isolation knife switch and the moving contact of the isolation knife switch are both installed on the support frame.

[0026] Preferably, the main busbar, the first branch busbar, the isolating knife switch static contact, and the isolating knife switch moving contact in the front chamber and the corresponding main busbar, the first branch busbar, the isolating knife switch static contact, and the isolating knife switch moving contact in the rear chamber are symmetrically arranged about the support frame.

[0027] The high-voltage electrical equipment provided by the present utility model is designed to enhance insulation performance and prevent grounding or short-circuit faults caused by insufficient safety distance between power phases and ground or between phases, thereby protecting the safety of equipment and operators. The main busbar, the first branch busbar, the second branch busbar, the third branch busbar, the fourth branch busbar, the static contact of the isolating knife switch and the static contact of the isolating knife switch on the outgoing line are all supported or hoisted in the cabinet through support insulators, and one end of the moving contact of the isolating knife switch and the moving contact of the isolating knife switch on the outgoing line are rotatably arranged inside the cabinet through corresponding support insulators, and a knife switch pull rod is provided on the cabinet to connect the corresponding moving contact of the isolating knife switch and the moving contact of the isolating knife switch on the outgoing line, thereby driving them to rotate to contact or separate with the corresponding static contact of the isolating knife switch and the static contact of the isolating knife switch on the outgoing line.

[0028] The main busbar is electrically connected to one end of the first branch busbar through bolts, clamps, etc. to transmit electricity from the power source to the first branch busbar, and the other end of the first branch busbar is connected to the static contact of the isolation knife switch. Correspondingly, the moving contact of the isolation knife switch is connected to one end of the second branch busbar, and the other end of the second branch busbar is connected to one end of the circuit breaker. When the moving contact of the isolation knife switch is driven to rotate to achieve closing, the electric energy transmitted by the second branch busbar can be transmitted to the circuit breaker, and when the moving contact of the isolation knife switch is driven to rotate to achieve opening, the electric energy transmitted by the second branch busbar can be transmitted to the circuit breaker. Can it be transmitted to the circuit breaker; and the other end of the circuit breaker is connected to the static contact of the isolating knife switch on the outgoing side through the third branch busbar, when the moving contact of the isolating knife switch on the outgoing side is driven to rotate to achieve closing, the electric energy output by the circuit breaker can be transmitted to the moving contact of the isolating knife switch on the outgoing side and the fourth branch busbar, and when the moving contact of the isolating knife switch on the outgoing side is driven to rotate to achieve opening, the electric energy output by the circuit breaker cannot be transmitted to the moving contact of the isolating knife switch on the outgoing side and the fourth branch busbar, and then an outgoing cable with the fourth branch busbar is set to finally output the electric energy.

[0029] Furthermore, in order to ensure the safe operation of the power system, silicone rubber self-adhesive tape is wrapped around the periphery of the main busbar, the first branch busbar, the second branch busbar, the third branch busbar, and the fourth branch busbar to form an insulation layer, and a polymer silicone-fluorine coating is sprayed around the periphery of the support insulators and the knife switch pull rod to achieve insulation treatment. Moreover, due to the high compatibility of the silicone rubber self-adhesive tape and the polymer silicone-fluorine coating, the insulation performance of the high-voltage electrical equipment is relatively strong. When assembling or repairing the strengthened insulation, it is easy to wrap the silicone rubber self-adhesive tape or spray the polymer silicone-fluorine coating on the corresponding electrical components, and the work efficiency of the insulation strengthening operation of the high-voltage electrical equipment is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of a specific embodiment provided by the present utility model;

[0032] Figure 2 A partial schematic diagram of a cabinet according to a specific embodiment of the present invention;

[0033] Figure 3 A partial schematic diagram of the main busbar, the first branch busbar, the second branch busbar, and the third branch busbar of a specific embodiment provided by the present utility model;

[0034] Figure 4 This is a cross-sectional view of the main busbar of a specific embodiment provided by the present utility model.

[0035] Figures 1-4 , the reference numerals include:

[0036] 1-cabinet; 101-support frame; 102-first wall bushing; 103-sealing plate; 104-second wall bushing; 105-third wall bushing;

[0037] 2-main busbar; 21-A phase main busbar; 22-B phase main busbar; 23-C phase main busbar;

[0038] 3-First branch busbar; 301-Phase A branch busbar; 302-Phase B branch busbar; 303-Phase C branch busbar;

[0039] 4-Isolating knife switch static contact; 5-Isolating knife switch moving contact; 6-Second branch busbar; 7-Circuit breaker; 8-Third branch busbar; 9-Outgoing side isolating knife switch static contact; 10-Outgoing side isolating knife switch moving contact; 11-Fourth branch busbar; 12-Post insulator; 13-Knife switch pull rod; 14-Silicone rubber self-adhesive tape. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] The core of the utility model is to provide a high-voltage electrical equipment, which has good insulation performance and high efficiency in insulation reinforcement operation.

[0042] Please refer to Figure 1 The utility model provides a high-voltage electrical equipment, including a cabinet 1; a support insulator 12; a main busbar 2, a first branch busbar 3, a second branch busbar 6, a third branch busbar 8, a fourth branch busbar 11, an isolating knife switch static contact 4 and an outgoing line side isolating knife switch static contact 9 installed inside the cabinet 1 through the support insulator 12; an isolating knife switch moving contact 5 and an outgoing line side isolating knife switch moving contact 10 that can swing through the support insulator 12; a circuit breaker 7 installed inside the cabinet 1; and a knife switch pull rod 13.

[0043] Among them, the first end of the first branch busbar 3 is electrically connected to the main busbar 2, and the second end is electrically connected to the isolating knife switch static contact 4, the first end of the second branch busbar 6 is electrically connected to the isolating knife switch moving contact 5, and the second end is electrically connected to the first end of the circuit breaker 7, the first end of the third branch busbar 8 is electrically connected to the second end of the circuit breaker 7, and the second end is electrically connected to the outgoing side isolating knife switch static contact 9, and the fourth branch busbar 11 is electrically connected to the outgoing side isolating knife switch moving contact 10;

[0044] The knife switch pull rod 13 is inserted into the cabinet 1 and connected to the isolating knife switch moving contact 5, and is used to drive the isolating knife switch moving contact 5 to contact or separate with the isolating knife switch static contact 4, and drive the outgoing side isolating knife switch moving contact 10 to contact or separate with the outgoing side isolating knife switch static contact 9;

[0045] The outer peripheries of the main busbar 2, the first branch busbar 3, the second branch busbar 6, the third branch busbar 8 and the fourth branch busbar 11 are spirally wrapped with silicone rubber self-adhesive tape 14 to form an insulating layer, and the outer peripheries of the support insulators 12 and the knife switch pull rod 13 are sprayed with a polymer silicone-fluorine coating.

[0046] like Figure 1As shown, in order to enhance the insulation performance and prevent grounding or short circuit faults caused by insufficient safety distance between the power phase and the ground or between phases, thereby protecting the safety of equipment and operators, the main busbar 2, the first branch busbar 3, the second branch busbar 6, the third branch busbar 8, the fourth branch busbar 11, the isolating knife switch static contact 4 and the outgoing line side isolating knife switch static contact 9 are all supported or hoisted in the cabinet 1 through the support insulator 12, and one end of the isolating knife switch moving contact 5 and the outgoing line side isolating knife switch moving contact 10 are rotatably arranged inside the cabinet 1 through the corresponding support insulator 12, and a knife switch pull rod 13 is provided on the cabinet 1 to connect the corresponding isolating knife switch moving contact 5 and the outgoing line side isolating knife switch moving contact 10, thereby driving them to rotate to contact or separate with the corresponding isolating knife switch static contact 4 and the outgoing line side isolating knife switch static contact 9.

[0047] Typically, a switch pull rod comprises a pull rod body and an insulator. The insulator is provided at the end of the pull rod body and is connected to the corresponding isolating knife switch moving contact 5 or the outgoing line side isolating knife switch moving contact 10 to meet insulation requirements.

[0048] The main busbar 2 is electrically connected to one end of the first branch busbar 3 by bolts, clamps, etc. to transmit electricity from the power supply to the first branch busbar 3, and the other end of the first branch busbar 3 is connected to the static contact 4 of the isolating knife switch. Correspondingly, the movable contact 5 of the isolating knife switch is connected to one end of the second branch busbar 6, and the other end of the second branch busbar 6 is connected to the upper end of the circuit breaker 7. When the movable contact 5 of the isolating knife switch is driven to rotate to achieve closing, the electric energy transmitted by the second branch busbar 6 can be transmitted to the circuit breaker 7, and when the movable contact 5 of the isolating knife switch is driven to rotate to achieve opening, the electric energy transmitted by the second branch busbar 6 cannot be transmitted to the circuit breaker 7. It can be transmitted to the circuit breaker 7; and the lower end of the circuit breaker 7 is connected to the static contact 9 of the outgoing line side isolating knife switch through the third branch busbar 8. When the moving contact 10 of the outgoing line side isolating knife switch is driven to rotate to achieve closing, the electric energy output by the circuit breaker 7 can be transmitted to the moving contact 10 of the outgoing line side isolating knife switch and the fourth branch busbar 11. When the moving contact 10 of the outgoing line side isolating knife switch is driven to rotate to achieve opening, the electric energy output by the circuit breaker 7 cannot be transmitted to the moving contact 10 of the outgoing line side isolating knife switch and the fourth branch busbar 11, and then an outgoing cable with the fourth branch busbar 11 is set to finally output the electric energy.

[0049] It should be noted that the method of electrically connecting the moving contact, the static contact and the branch busbar is an existing mature technology and will not be elaborated here.

[0050] Furthermore, in order to ensure the safe operation of the power system, a silicone rubber self-adhesive tape 14 is wrapped around the periphery of the main busbar 2, the first branch busbar 3, the second branch busbar 6, the third branch busbar 8, and the fourth branch busbar 11 to form an insulating layer, and a polymer silicone-fluorine coating is sprayed on the periphery of the support insulator 12 and the knife switch pull rod 13 to achieve insulation treatment. Since the silicone rubber self-adhesive tape 14 and the polymer silicone-fluorine coating have a high compatibility, the insulation performance of the high-voltage electrical equipment is relatively strong. When assembling or repairing the strengthened insulation, it is easy to wrap the silicone rubber self-adhesive tape or spray the polymer silicone-fluorine coating on the corresponding electrical components. The working efficiency of the insulation strengthening operation of the high-voltage electrical equipment is relatively high, and the silicone rubber self-adhesive tape 14 has good shock absorption, heat resistance, mechanical shock resistance and corona resistance.

[0051] It should be noted that the winding method of the silicone rubber self-adhesive tape 14 is not limited, as long as it can meet the insulation performance requirements, for example, a 1 / 4 overlapping winding method or a 1 / 3 overlapping winding method can be used, and the thickness of the silicone rubber self-adhesive tape 14 is not limited, as long as it can meet the tensile strength greater than or equal to 8 , elongation at break greater than or equal to 500%, 20 When the volume resistivity is greater than or equal to , the dielectric strength is greater than or equal to 26 MV / m insulation performance requirements; it should also be noted that there is no restriction on the thickness of the polymer silicone fluorine coating and its spraying method, as long as it can meet the 20 Volume resistivity greater than or equal to , 20 At 50Hz, the relative dielectric constant is less than or equal to 2.68, the dielectric strength is greater than or equal to 24kV / mm, and the dielectric loss factor is less than or equal to The insulation performance requirements, as well as the physical and chemical properties of tensile strength greater than or equal to 7.0MPa, elongation at break greater than or equal to 380%, tear strength greater than or equal to 19N / mm, and thermal conductivity less than or equal to 0.035w / (mk), can be met, such as 4mm or 2mm.

[0052] Furthermore, the cabinet 1 is also provided with a lightning arrester, a voltage transformer and a current transformer, and the peripheries of the lightning arrester, the voltage transformer and the current transformer are sprayed with a polymer silicone-fluorine coating; furthermore, the top plate and the side plates of the cabinet 1 have heat dissipation holes.

[0053] Based on the above embodiment, the main busbar 2 includes a phase A main busbar 21, a phase B main busbar 22 and a phase C main busbar 23, and the first branch busbar 3, the second branch busbar 6, the third branch busbar 8 and the fourth branch busbar 11 all include a phase A branch busbar 301, a phase B branch busbar 302 and a phase C branch busbar 303; the phase A branch busbar 301, the phase B branch busbar 302 and the phase C branch busbar 303 can be electrically connected to the phase A main busbar 21, the phase B main busbar 22 and the phase C main busbar 23 respectively; the silicone rubber self-adhesive tape 14 wrapped around the periphery of the phase A branch busbar 301 and the phase A main busbar 21 is yellow tape; the silicone rubber self-adhesive tape 14 wrapped around the periphery of the phase B branch busbar 302 and the phase B main busbar 22 is green tape; the silicone rubber self-adhesive tape 14 wrapped around the periphery of the phase C branch busbar 303 and the phase C main busbar 23 is red tape.

[0054] In order to stably transmit electric energy, in this high-voltage electrical equipment, the main busbar 2 is provided with a three-phase main busbar 2, namely, the A-phase main busbar 21, the B-phase main busbar 22 and the C-phase main busbar 23. Correspondingly, the first branch busbar 3, the second branch busbar 6, the third branch busbar 8 and the fourth branch busbar 11 are all provided with three-phase branch busbars, namely, the A-phase branch busbar 301, the B-phase branch busbar 302 and the C-phase branch busbar 303, and the same-phase main busbar 2, the first branch busbar 3, the second branch busbar 6, the third branch busbar 8 and the fourth branch busbar 11 can be electrically connected directly or through corresponding moving and static contacts.

[0055] It should be noted that the arrangement of the three-phase main busbar 2 is not limited. For example, Figure 1 In the orientation shown, the A-phase main busbar 21, the B-phase main busbar 22, and the C-phase busbar are arranged in parallel along the transverse direction and arranged in sequence along the direction perpendicular to the paper.

[0056] While ensuring the insulation performance, in order to distinguish the busbars of each phase, a yellow silicone rubber self-adhesive tape 14 is wrapped around the periphery of the A-phase main busbar 2 and the periphery of the A-phase branch busbar 301, a green silicone rubber self-adhesive tape 14 is wrapped around the periphery of the B-phase main busbar 22 and the periphery of the B-phase branch busbar 302, and a red silicone rubber self-adhesive tape 14 is wrapped around the periphery of the C-phase main busbar 23 and the periphery of the C-phase branch busbar 303.

[0057] It should be noted that the types of yellow tape, green tape and red tape are not limited. For example, the yellow tape, green tape and red tape all include silicone rubber self-adhesive tape 14 and coating, and the coating of the yellow tape is yellow coating, the coating of the green tape is green coating, and the coating of the red tape is red coating; or, pigments of corresponding colors are added during the preparation process to form tapes of corresponding colors.

[0058] On the basis of the above embodiment, the spiral angle of the silicone rubber self-adhesive tape 14 is The winding spacing of the silicone rubber self-adhesive tape 14 is 1 / 2 of its own width, and the thickness of the insulating layer is greater than or equal to 3 mm.

[0059] like Figure 3 As shown, the busbar extends vertically, and the silicone rubber self-adhesive tape 14 is wrapped around the outer periphery of the busbar from top to bottom at an angle of 45° to the vertical direction. In the same layer, in two adjacent overlapping wraps, the tape segment of the lower wrap is pressed against 1 / 2 of the tape segment of the upper wrap. The thickness of the insulation layer finally formed by wrapping is 3 mm to ensure insulation performance.

[0060] On the basis of the above embodiment, the thickness of the polymer silicon-fluorine coating is greater than or equal to 1.5 mm. Such a setting is beneficial to improving the insulation performance.

[0061] It should be noted that there is no restriction on the spraying method of the polymer silicone-fluorine coating, as long as it can meet the above requirements, for example, one-time spraying, or layered spraying, the thickness of a single layer ranges from 0.3-0.5mm, and another layer is sprayed about 15 minutes after spraying one layer.

[0062] On the basis of the above embodiment, the inner cavity of the cabinet 1 is divided into a front cavity and a rear cavity by the support frame 101;

[0063] The front chamber and the rear chamber are both provided with corresponding main busbars 2, first branch busbars 3, isolation switch static contacts 4 and isolation switch moving contacts 5, and the first branch busbars 3 are electrically connected to the corresponding main busbars 2 and the corresponding isolation switch static contacts 4;

[0064] The circuit breaker 7 is disposed in the front chamber, the outgoing-side isolating switch moving contact 10 and the outgoing-side isolating switch static contact 9 are both disposed in the rear chamber, the support frame 101 is provided with a first wall bushing 102, the third branch busbar 8 passes through the first wall bushing 102 to connect the second end of the circuit breaker 7 and the outgoing-side isolating switch static contact 9, and the outer periphery of the portion of the third branch busbar 8 inserted into the first wall bushing 102 and the inner wall of the first wall bushing 102 are sprayed with a polymer silicone-fluorine coating, and the outer periphery of the remaining structure of the third branch busbar 8 is wrapped with a silicone rubber self-adhesive tape 14;

[0065] The support frame 101 has a mounting through hole, the hole wall of which is provided with a support insulator 12. The second branch busbar 6 passes through the mounting through hole and the isolating knife switch movable contact 5 in the cavity is connected to the support insulator 12 in the mounting through hole.

[0066] like Figure 1 and Figure 2As shown, the inner cavity of the cabinet 1 is divided into two parts by a supporting frame 101 arranged therein, namely a front chamber on the right and a rear chamber on the left. In coordination, the front chamber and the rear chamber are respectively provided with their own main busbar 2, first branch busbar 3, isolation knife switch static contact 4 and isolation knife switch moving contact 5. The main busbar 2, first branch busbar 3 and isolation knife switch static contact 4 located in the same chamber are electrically connected in sequence, and the isolation knife switch moving contact 5 and isolation knife switch static contact 4 in the same chamber cooperate.

[0067] It should be noted that in the high-voltage electrical equipment, in the front chamber and the rear chamber of a cabinet 1, the number of the main busbar 2, the first branch busbar 3, the isolating knife switch static contact 4, and the outgoing line side isolating knife switch moving contact 10 are all three, and the number of the second branch busbar 6, the third branch busbar 8, the outgoing line side isolating knife switch static contact 9 and the outgoing line side isolating knife switch moving contact 10 in a cabinet 1 are all three, that is, in the front chamber, the A phase main busbar 21, the A phase branch busbar 3 in the first branch busbar 3 are all three. The branch busbar 301 and the isolating knife switch static contact 4 are electrically connected in sequence, and the corresponding isolating knife switch moving contact 5 matched with the isolating knife switch static contact 4, the A-phase branch busbar 301 in the second branch busbar 6, a group of joint structures of the circuit breaker 7, the A-phase branch busbar 301 in the third branch busbar 8, and the outgoing side isolating knife switch static contact 9 are electrically connected in sequence, and the B-phase main busbar 22, the B-phase branch busbar 302 in the first branch busbar 3, and the other isolating knife switch static contact 4 are electrically connected in sequence. The isolating knife switch static contact 4 is electrically connected to the corresponding isolating knife switch moving contact 5, the B-phase branch busbar 302 in the second branch busbar 6, another set of joint structures of the circuit breaker 7, the B-phase branch busbar 302 in the third branch busbar 8, and another outgoing side isolating knife switch static contact 9 in sequence, the C-phase main busbar 23, the C-phase branch busbar 303 in the first branch busbar 3, and another isolating knife switch static contact 4 in sequence, and the isolating knife switch static contact 4 is electrically connected to the C-phase main busbar 23, the C-phase branch busbar 303 in the first branch busbar 3, and another isolating knife switch static contact 4 in sequence. The corresponding isolating knife switch moving contact 5, the C-phase branch busbar 303 in the second branch busbar 6, another set of joint structures of the circuit breaker 7, the C-phase branch busbar 303 in the third branch busbar 8, and another outgoing line side isolating knife switch static contact 9 are electrically connected in sequence, and the three outgoing line side isolating knife switch static contacts 9 can respectively achieve closing or opening with the corresponding outgoing line side isolating knife switch moving contact 10. Usually, an installation distance is maintained between each phase and between each phase and the cabinet 1; the same is true in the rear chamber.

[0068] like Figure 1As shown, the circuit breaker 7 is installed in the front chamber, and the upper end of the circuit breaker 7 is connected to the isolating knife switch moving contact 5 in the front chamber and the rear chamber through the second branch busbar 6. In order to ensure the safe operation of the power system, a mounting hole is opened on the support frame 101, and a support insulator 12 is installed on the lower or upper side wall of the mounting hole to install and support the second branch busbar 6 passing through the support frame 101 through the mounting hole, and a sufficient insulation distance is maintained between the second branch busbar 6 passing through the support frame 101 and the hole wall of the mounting hole.

[0069] like Figure 1 As shown, the static contact 9 of the outgoing-side isolating knife switch and the moving contact 10 of the outgoing-side isolating knife switch are installed in the rear chamber, and the right end of the third branch busbar 8 is connected to the lower end of the circuit breaker 7. In order to ensure the safe operation of the power system, a first wall bushing 102 is installed on the supporting frame 101. The left end of the third branch busbar 8 passes through the hole of the first wall bushing 102 to extend into the rear chamber to electrically connect to the static contact 9 of the outgoing-side isolating knife switch, and the third branch busbar 8 is inserted into the outer periphery of part of the structure of the first wall bushing 102, and the inner wall of the first wall bushing 102 is sprayed with a polymer silicone-fluorine coating, and the remaining structure of the third branch busbar 8 is wrapped with a silicone rubber self-adhesive tape 14 to improve the insulation performance while reducing the difficulty of manufacturing and maintenance.

[0070] On the basis of the above embodiment, two cabinets 1 are arranged in parallel, and the two cabinets 1 are provided with corresponding support insulators 12, main busbar 2, first branch busbar 3, second branch busbar 6, third branch busbar 8, fourth branch busbar 11, isolating knife switch static contact 4, outgoing line side isolating knife switch static contact 9, isolating knife switch moving contact 5, outgoing line side isolating knife switch moving contact 10 and circuit breaker 7;

[0071] The sealing plate 103 on the side close to the two cabinets 1 is provided with a second wall sleeve 104 and a third wall sleeve 105. The main busbars 2 arranged in the two front chambers are both inserted into the corresponding second wall sleeves 104, and the main busbars 2 arranged in the two rear chambers are both inserted into the corresponding third wall sleeves 105; the outer periphery of the part of the structure where the main busbar 2 is inserted into the second wall sleeve 104 and the third wall sleeve 105, and the inner walls of the second wall sleeve 104 and the third wall sleeve 105 are sprayed with a polymer silicone-fluorine coating.

[0072] like Figure 1 and Figure 2As shown, two cabinets 1 are arranged in parallel, and their respective support insulators 12, main busbars 2, first branch busbars 3, second branch busbars 6, third branch busbars 8, fourth branch busbars 11, isolating knife switch static contacts 4, outgoing line side isolating knife switch static contacts 9, isolating knife switch moving contacts 5, outgoing line side isolating knife switch moving contacts 10 and circuit breakers 7 are respectively arranged in the two cabinets 1, and the arrangement of the above-mentioned components in the two cabinets 1 can refer to the above-mentioned specific embodiments. When in use, it is possible to choose to transmit electric energy to the main busbars 2 in one cabinet 1 or two cabinets 1. It is only necessary to operate the isolating knife switch moving contacts 5, outgoing line side isolating knife switch moving contacts 10 and circuit breaker 7 in the corresponding cabinet 1 to close or open the switch. And it is possible to perform a power-off operation on the main busbar 2 in one cabinet 1 to inspect and repair the electrical components in the other cabinet 1.

[0073] In order to improve the stability of the main busbar 2 and ensure the insulation performance, a second wall bushing 104 and a third wall bushing 105 are provided on the sealing plate 103 on the side close to the two cabinets 1, and the left end of the second wall bushing 104 extends into the front chamber of the left cabinet 1, and the right end extends into the front chamber of the right cabinet 1. Correspondingly, the main busbar 2 set in the front chamber of the left cabinet 1 is inserted into the channel at the left end of the second wall bushing 104, and the right cabinet 1 is inserted into the channel at the right end of the second wall bushing 104; and the left end of the third wall bushing 105 extends into the rear chamber of the left cabinet 1, and the right end extends into the rear chamber of the right cabinet 1. Correspondingly, the main busbar 2 set in the rear chamber of the left cabinet 1 is inserted into the channel at the left end of the third wall bushing 105, and the main busbar 2 set in the rear chamber of the right cabinet 1 is inserted into the channel at the right end of the third wall bushing 105.

[0074] The main busbar 2 is inserted into the outer periphery of part of the structure of the second wall bushing 104 and the third wall bushing 105, and the inner walls of the second wall bushing 104 and the third wall bushing 105 are sprayed with a polymer silicone-fluorine coating to improve the insulation performance while reducing the difficulty of manufacturing and maintenance.

[0075] It should be noted that the combination of the two cabinets 1 is not limited, as long as the above-mentioned setting requirements are met. For example, the two cabinets 1 are independent of each other. In this case, the adjacent and opposite back panels of the two cabinets 1 are the above-mentioned cover panels 103; or, the two cabinets 1 are an integrated structure, such as Figure 2 As shown, the sealing plate 103 is a partition connecting the adjacent ends of the two cabinets 1 .

[0076] Based on the above embodiment, the main busbar 2 is a double copper busbar structure, and the head end of one of the two layers of copper busbars is electrically connected to the tail end of the other through bolts or clips to improve the ability to transmit electrical energy.

[0077] Based on the above embodiment, the main busbar 2, the first branch busbar 3, the isolating knife switch static contact 4, the isolating knife switch moving contact 5, the second branch busbar 6, the circuit breaker 7, the outgoing line side isolating knife switch static contact 9, and the outgoing line side isolating knife switch moving contact 10 are arranged in sequence along the height direction of the cabinet body 1, and the main busbar 2 is located on the top side of the cabinet body 1.

[0078] like Figure 1 As shown, the main busbar 2 is located at the top of the cabinet 1, and the first branch busbar 3 led from the main busbar 2 extends downward to connect the isolation knife switch static contact 4 located below it. The isolation knife switch moving contact 5 is located below the isolation knife switch static contact 4, and the upper end of the isolation knife switch moving contact 5 can rotate relative to its lower end to contact or move away from the isolation knife switch static contact 4, and the circuit breaker 7 is located below the isolation knife switch moving contact 5. The second branch busbar 6 electrically connected to the lower end of the isolation knife switch moving contact 5 extends downward and to the right. It can be connected to the upper end of the circuit breaker 7, and the lower end of the circuit breaker 7 is electrically connected to the third branch busbar 8. The third branch busbar 8 extends to the left to connect to the outgoing side isolating knife switch static contact 9, and the outgoing side isolating knife switch moving contact 10 is located below the outgoing side isolating knife switch static contact 9, and the upper end of the outgoing side isolating knife switch moving contact 10 can rotate relative to its lower end to contact or move away from the outgoing side isolating knife switch static contact 9. With this arrangement, the layout of the high-voltage electrical equipment is reasonable and convenient for assembly and maintenance operations.

[0079] Based on the above embodiment, the support frame 101 extends along the width direction of the cabinet 1 and is connected to the back panel and panel of the cabinet 1. The main busbar 2 extends along the width direction of the cabinet 1, and the isolating knife switch static contact 4 and the isolating knife switch moving contact 5 are both installed on the support frame 101.

[0080] like Figure 1 As shown, the main busbar 2 extends in a direction perpendicular to the paper, and the isolating knife switch static contact 4 and the outgoing line side isolating knife switch moving contact 10 are both connected to the support frame 101. The second branch busbar 6 led out from the main busbar 2 extends downward, then turns and extends laterally to connect to the corresponding isolating knife switch static contact 4. With this arrangement, the layout of the high-voltage electrical equipment is more reasonable, and it is further convenient to carry out operations such as assembly and maintenance.

[0081] like Figure 1 As shown, based on the above embodiments, the main busbar 2, the first branch busbar 3, the isolating knife switch static contact 4, and the isolating knife switch moving contact 5 in the front chamber, and the corresponding main busbar 2, the first branch busbar 3, the isolating knife switch static contact 4, and the isolating knife switch moving contact 5 in the rear chamber are symmetrically arranged about the support frame 101.

[0082] It should be noted that the relational terms such as "first" and "second" mentioned above are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities; the "upper surface, lower surface, top, bottom" and the directional words "up, down, left, right" mentioned above are all defined based on the drawings in the specification.

[0083] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0084] The above is a detailed introduction to the high-voltage electrical equipment provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the method and core concept of the present invention. It should be noted that for those skilled in the art, without departing from the principles of the present invention, various improvements and modifications can be made to the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A high voltage electrical device, characterized in that: include: Cabinet (1); support insulator (12); main busbar (2), first branch busbar (3), second branch busbar (6), third branch busbar (8), fourth branch busbar (11), isolating knife switch static contact (4), and outgoing line side isolating knife switch static contact (9) installed inside the cabinet (1) via the support insulator (12); isolating knife switch moving contact (5) and outgoing line side isolating knife switch moving contact (10) arranged inside the cabinet (1) and capable of swinging via the support insulator (12); circuit breaker (7) installed inside the cabinet (1); knife switch pull rod (13); The first end of the first branch busbar (3) is electrically connected to the main busbar (2), and the second end is electrically connected to the isolating knife switch static contact (4); the first end of the second branch busbar (6) is electrically connected to the isolating knife switch moving contact (5), and the second end is electrically connected to the first end of the circuit breaker (7); the first end of the third branch busbar (8) is electrically connected to the second end of the circuit breaker (7), and the second end is electrically connected to the outgoing line side isolating knife switch static contact (9); the fourth branch busbar (11) is electrically connected to the outgoing line side isolating knife switch moving contact (10); The knife switch pull rod (13) is inserted into the cabinet (1) and connected to the isolating knife switch movable contact (5), and is used to drive the isolating knife switch movable contact (5) to contact or separate from the isolating knife switch static contact (4), and to drive the outgoing-side isolating knife switch movable contact (10) to contact or separate from the outgoing-side isolating knife switch static contact (9); The outer peripheries of the main busbar (2), the first branch busbar (3), the second branch busbar (6), the third branch busbar (8) and the fourth branch busbar (11) are all spirally wound with a silicone rubber self-adhesive tape (14) to form an insulating layer, and the outer peripheries of the support insulator (12) and the knife switch pull rod (13) are sprayed with a polymer silicone-fluorine coating.

2. The high-voltage electrical equipment according to claim 1, characterized in that: The main busbar (2) includes an A-phase main busbar (21), a B-phase main busbar (22), and a C-phase main busbar (23); the first branch busbar (3), the second branch busbar (6), the third branch busbar (8), and the fourth branch busbar (11) each include an A-phase branch busbar (301), a B-phase branch busbar (302), and a C-phase branch busbar (303); The A-phase branch busbar (301), the B-phase branch busbar (302), and the C-phase branch busbar (303) can be electrically connected to the A-phase main busbar (21), the B-phase main busbar (22), and the C-phase main busbar (23) respectively; The silicone rubber self-adhesive tape (14) wound around the periphery of the A-phase branch busbar (301) and the A-phase main busbar (21) is a yellow tape; The silicone rubber self-adhesive tape (14) wrapped around the periphery of the B-phase branch busbar (302) and the B-phase main busbar (22) is a green tape; The silicone rubber self-adhesive tape (14) wound around the periphery of the C-phase branch busbar (303) and the C-phase main busbar (23) is a red tape.

3. The high-voltage electrical equipment according to claim 2, characterized in that: The helical angle of the silicone rubber self-adhesive tape (14) is The winding spacing of the silicone rubber self-adhesive tape (14) is 1 / 2 of its own width, and the thickness of the insulating layer is greater than or equal to 3 mm.

4. The high-voltage electrical equipment according to claim 2, characterized in that: The thickness of the polymer silicon-fluorine coating is greater than or equal to 1.5 mm.

5. The high-voltage electrical equipment according to claim 2, characterized in that: The inner cavity of the cabinet (1) is divided into a front chamber and a rear chamber by a support frame (101); The front chamber and the rear chamber are both provided with the corresponding main busbar (2), the first branch busbar (3), the isolation knife switch static contact (4) and the isolation knife switch moving contact (5), and the first branch busbar (3) is electrically connected to the corresponding main busbar (2) and the corresponding isolation knife switch static contact (4); The circuit breaker (7) is arranged in the front chamber, the outgoing line side isolating knife switch moving contact (10) and the outgoing line side isolating knife switch static contact (9) are both arranged in the rear chamber, the support frame (101) is provided with a first wall bushing (102), the third branch busbar (8) passes through the first wall bushing (102) to connect the second end of the circuit breaker (7) and the outgoing line side isolating knife switch static contact (9), and the third branch busbar (8) is inserted into the outer periphery of a portion of the structure of the first wall bushing (102), and the inner wall of the first wall bushing (102) is sprayed with the polymer silicone-fluorine coating, and the remaining outer periphery of the third branch busbar (8) is wrapped with the silicone rubber self-adhesive tape (14); The support frame (101) has a mounting through hole, the hole wall of the mounting through hole is provided with the support insulator (12), the second branch busbar (6) passes through the mounting through hole with the isolating knife switch movable contact (5) in the rear chamber, and is connected to the support insulator (12) in the mounting through hole.

6. The high-voltage electrical equipment according to claim 5, characterized in that: The two cabinets (1) are arranged in parallel, and the corresponding support insulators (12), the main busbar (2), the first branch busbar (3), the second branch busbar (6), the third branch busbar (8), the fourth branch busbar (11), the isolating knife switch static contact (4), the outgoing line side isolating knife switch static contact (9), the isolating knife switch moving contact (5), the outgoing line side isolating knife switch moving contact (10) and the circuit breaker (7) are arranged in the two cabinets (1); The sealing plate (103) on the adjacent side of the two cabinet bodies (1) is provided with a second wall bushing (104) and a third wall bushing (105); the main busbars (2) provided in the two front chambers are both inserted into the corresponding second wall bushings (104); and the main busbars (2) provided in the two rear chambers are both inserted into the corresponding third wall bushings (105); and the outer periphery of a portion of the structure where the main busbar (2) is inserted into the second wall bushings (104) and the third wall bushings (105), and the inner walls of the second wall bushings (104) and the third wall bushings (105) are sprayed with the polymer silicone-fluorine coating.

7. The high-voltage electrical equipment according to claim 5, characterized in that: The main busbar (2) is a double copper busbar structure, and the head end of one of the two layers of copper busbars is electrically connected to the tail end of the other.

8. The high-voltage electrical equipment according to claim 5, characterized in that: The main busbar (2), the first branch busbar (3), the isolating knife switch static contact (4), the isolating knife switch moving contact (5), the second branch busbar (6), the circuit breaker (7), the outgoing line side isolating knife switch static contact (9), and the outgoing line side isolating knife switch moving contact (10) are arranged in sequence along the height direction of the cabinet (1), and the main busbar (2) is located on one side of the cabinet top of the cabinet (1).

9. The high-voltage electrical equipment according to claim 8, characterized in that: The support frame (101) extends along the width direction of the cabinet (1) and is connected to the back plate and the panel of the cabinet (1); the main busbar (2) extends along the width direction of the cabinet (1), and the isolation knife switch static contact (4) and the isolation knife switch moving contact (5) are both mounted on the support frame (101).

10. The high-voltage electrical equipment according to claim 9, characterized in that: The main busbar (2), the first branch busbar (3), the isolating knife switch static contact (4), and the isolating knife switch moving contact (5) in the front chamber and the corresponding main busbar (2), the first branch busbar (3), the isolating knife switch static contact (4), and the isolating knife switch moving contact (5) in the rear chamber are symmetrically arranged with respect to the support frame (101).

Images