Compact sleeve retraction type composite combined electric appliance for 145kV mobile transformer

Abstract

The invention relates to a compact sleeve retraction type composite combined electric appliance for a 145kV mobile transformer. The compact sleeve retraction type composite combined electric appliance is characterized by comprising a three-phase tank type circuit breaker, a three-pole three-station isolation grounding switch, an elbow bus, a current transformer, an airtight retraction rotating device and a composite sleeve, according to the 145kV composite combined electric appliance, an airtight retraction rotating device is designed, so that the casing pipe of the product is rotated and forms are switched under the condition that gas in the product is not leaked, and the maximum insulation distance size is ensured; a transportation form and an operation form can be switched; the whole structure is designed in a non-over-limit width range, the whole width is smaller than 2.55 m, moving and carrying are convenient, and meanwhile the transportation safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, and in particular to a compact bushing retractable composite combined electrical appliance for a 145kV mobile transformer. Background Art

[0002] With the development of society and the continuous growth of the economy, the demand for power supply reliability is constantly increasing. By integrating transformers and switchgear on the transport vehicle, the vehicle-mounted mobile substation can flexibly switch application scenarios. With more and more customer demands, due to the particularity of vehicle-mounted mobile application scenarios, some special restrictions are also put forward for the design of switchgear.

[0003] At present, conventional 145kV switchgear is limited by insulation distance, and the equipment width is generally greater than 3m, which has exceeded the domestic and international road width limit transportation size of 2.55m. Oversized transportation vehicles need to submit transportation applications in advance, the process is cumbersome, and the vehicles cannot be transported on narrow roads with small turning radius, so the scope of application is limited.

[0004] The switch combination electrical appliances equipped in traditional mobile substations have higher insulation distance requirements in high-altitude areas due to road width requirements. Currently, the industry does not have any vehicle-mounted mobile substation products that meet these working conditions.

[0005] In summary, the industry urgently needs a more compact 145kV switch combination device with a width size of ≤2.55mm that can cover high-altitude areas. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a compact bushing retractable composite combination electrical appliance for 145kV mobile transformer, which can solve the problem that the general available 145kV grade switch combination electrical equipment has a width of generally ≥3m, a limited application range, and an insulation distance that cannot meet the operating conditions in high-altitude areas.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: a compact bushing retractable composite combined electrical appliance for 145kV mobile transformer, the innovation of which is: comprising a three-phase tank circuit breaker, a three-pole three-position isolating grounding switch, a bent busbar, a current transformer, an airtight retracting rotating device and a composite bushing; A spring operating mechanism is installed at one end of the three-phase tank circuit breaker, and two rows of three-phase interfaces are arranged on the three-phase tank circuit breaker, and three single-phase interfaces are arranged at each row of three-phase interfaces; the inter-pole tilt angle of the three-phase tank circuit breaker is 30°, and the phase spacing is 630mm; the spring operating mechanism performs power transmission through the output connecting rod, and the three phases are mechanically linked through the inter-phase pull rod; The current transformer has three components and is respectively installed at three single-phase interfaces of one column of the three-phase tank circuit breaker, and the three unidirectional interfaces of the other column are not installed with current transformers; There are six three-pole three-station isolating and grounding switches, which are respectively installed on the tops of the three current transformers and the three one-way interfaces of the other column of the three-phase tank circuit breaker; each three-pole three-station isolating and grounding switch is installed with an isolating and grounding switch operating mechanism; There are six airtight retracting and rotating devices, which are correspondingly installed on the tops of six three-pole three-position isolating and grounding switches; There are six bent busbars, which are correspondingly mounted on the top of the airtight retracting rotating device; The composite sleeves are six and are correspondingly mounted on the top ends of the bent busbars. The composite sleeves and the bent busbars can move and rotate around the central axis of the airtight retracting rotating device.

[0008] Furthermore, a control cabinet is provided on one side of the three-phase tank type circuit breaker.

[0009] Furthermore, the airtight retracting and rotating device comprises an upper flange, an inner cavity sleeve, a bearing, a skeleton oil seal, a copper sleeve and an outer sleeve; The upper flange is fixed to the top of the inner cavity sleeve by bolt locking; the inner cavity sleeve is a cylindrical structure, and a stepped surface is provided on the outer wall of the inner cavity sleeve; the inner cavity sleeve is nested in the outer sleeve, and a bearing, a skeleton oil seal and a copper sleeve are provided between the outer wall of the inner cavity sleeve and the inner wall of the outer sleeve; a sealing end cover is provided at the end of the outer sleeve.

[0010] The advantages of the present invention are: 1) The 145kV composite combined electrical appliance of the present invention is designed with an airtight retracting and rotating device to ensure that the casing of the product is rotated without leaking the internal gas of the product, switch the form, and ensure the maximum insulation distance size; the transport form and the operating form can be switched; the overall structure is designed within the non-overlimit width range, and the overall width is less than 2.55m, which is convenient for movement and carrying, and at the same time improves the safety of transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0012] Figure 1 The present invention is a structural schematic diagram of a compact bushing retractable composite combination electrical appliance for a 145kV mobile transformer.

[0013] Figure 2 The present invention is a schematic structural diagram of an airtight retracting and rotating device for a compact bushing retracting composite combination electrical appliance for a 145kV mobile transformer.

[0014] Figure 3 The present invention is a schematic structural diagram of an isolating and grounding switch of a compact bushing retractable composite combination electrical appliance for a 145kV mobile transformer. DETAILED DESCRIPTION

[0015] 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 are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] like Figures 1 to 3 A compact bushing retractable composite combined electrical appliance for a 145 kV mobile transformer is shown, comprising a three-phase tank circuit breaker 1, a three-pole three-position isolating earthing switch 2, a bent-through busbar 3, a current transformer 4, an airtight retractable rotating device 5 and a composite bushing 6.

[0018] A spring operating mechanism 11 is installed at one end of the three-phase tank circuit breaker 1, and two rows of three-phase interfaces are arranged on the three-phase tank circuit breaker 1, and three single-phase interfaces are arranged at each row of three-phase interfaces; the inter-pole inclination angle of the three-phase tank circuit breaker is 30°, and the phase spacing is 630mm; the spring operating mechanism 11 transmits power through the output connecting rod, and the three phases are mechanically linked through the inter-phase pull rod.

[0019] There are three current transformers 4 which are respectively installed at three single-phase interfaces of one column of the three-phase tank type circuit breaker 1, and the three unidirectional interfaces of the other column are not installed with current transformers 4.

[0020] There are six three-pole three-position isolating and grounding switches 2, which are respectively installed on the tops of three current transformers and three unidirectional interfaces of another column of three-phase tank circuit breakers 1; each three-pole three-position isolating and grounding switch 2 is installed with an isolating and grounding switch operating mechanism 21.

[0021] There are six airtight retracting and rotating devices 5 , which are correspondingly installed on the top ends of the six three-pole three-position isolating and grounding switches 2 .

[0022] There are six bent busbars 3 and they are correspondingly mounted on the top of the airtight retracting rotating device 5; There are six composite sleeves 6 which are correspondingly mounted on the top ends of the bent busbars 3 . The composite sleeves 6 and the bent busbars 3 can move and rotate around the central axis of the airtight retracting rotating device 5 .

[0023] A control cabinet 12 is provided on one side of the three-phase tank type circuit breaker 1 .

[0024] The airtight retracting and rotating device 5 comprises an upper flange 51 , an inner cavity sleeve 52 , a bearing 53 , a skeleton oil seal 54 , a copper sleeve 55 and an outer sleeve 56 .

[0025] The upper flange 51 is fixed to the top of the inner cavity sleeve 52 by bolt locking; the inner cavity sleeve 52 is a cylindrical structure, and a stepped surface is provided on the outer wall of the inner cavity sleeve 52; the inner cavity sleeve 52 is nested in the outer sleeve 56, and a bearing 53, a skeleton oil seal 54 and a copper sleeve 55 are provided between the outer wall of the inner cavity sleeve 52 and the inner wall of the outer sleeve; a sealing end cover is provided at the end of the outer sleeve 56.

[0026] The working principle of the present invention is as follows: the 145kV composite combined electrical appliance is designed with an airtight retracting and rotating device to ensure that the product casing is rotated without leaking the internal gas of the product, switch the form, and ensure the maximum insulation distance size; the transport form and the operating form can be switched; the overall structure is designed within the non-overlimit width range, and the overall width is less than 2.55m, which is convenient for movement and carrying, and at the same time improves the safety of transportation.

[0027] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A compact bushing retractable composite combination electrical appliance for 145kV mobile transformer, characterized in that: It includes three-phase tank circuit breaker, three-pole three-position isolating earthing switch, elbow busbar, current transformer, airtight retracting rotating device and composite bushing; A spring operating mechanism is installed at one end of the three-phase tank circuit breaker, and two rows of three-phase interfaces are arranged on the three-phase tank circuit breaker, and three single-phase interfaces are arranged at each row of three-phase interfaces; the inter-pole tilt angle of the three-phase tank circuit breaker is 30°, and the phase spacing is 630mm; the spring operating mechanism performs power transmission through the output connecting rod, and the three phases are mechanically linked through the inter-phase pull rod; The current transformer has three components and is respectively installed at three single-phase interfaces of one column of the three-phase tank circuit breaker, and the three unidirectional interfaces of the other column are not installed with current transformers; There are six three-pole three-station isolating and grounding switches, which are respectively installed on the tops of the three current transformers and the three one-way interfaces of the other column of the three-phase tank circuit breaker; each three-pole three-station isolating and grounding switch is installed with an isolating and grounding switch operating mechanism; There are six airtight retracting and rotating devices, which are correspondingly installed on the tops of six three-pole three-position isolating and grounding switches; There are six bent busbars, which are correspondingly mounted on the top of the airtight retracting rotating device; The composite sleeves are six and are correspondingly mounted on the top ends of the bent busbars. The composite sleeves and the bent busbars can move and rotate around the central axis of the airtight retracting rotating device.

2. The compact bushing retractable composite combination electrical appliance for 145kV mobile transformer according to claim 1, characterized in that: A control cabinet is arranged on one side of the three-phase tank type circuit breaker.

3. The compact bushing retractable composite switchgear for 145kV mobile transformer according to claim 1, characterized in that: The airtight retracting and rotating device comprises an upper flange, an inner cavity sleeve, a bearing, a skeleton oil seal, a copper sleeve and an outer sleeve; The upper flange is fixed to the top of the inner cavity sleeve by bolt locking; the inner cavity sleeve is a cylindrical structure, and a stepped surface is provided on the outer wall of the inner cavity sleeve; the inner cavity sleeve is nested in the outer sleeve, and a bearing, a skeleton oil seal and a copper sleeve are provided between the outer wall of the inner cavity sleeve and the inner wall of the outer sleeve; a sealing end cover is provided at the end of the outer sleeve.

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