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

Abstract

The utility model 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] This utility model relates to the field of power equipment technology, and in particular to a compact bushing retractable composite switchgear for a 145kV mobile transformer. Background Technology

[0002] With social development and continuous economic growth, the demand for reliable power supply is constantly increasing. Vehicle-mounted mobile substations integrate transformers and switchgear on a transport vehicle, allowing for flexible switching of application scenarios. Customer needs are increasing. Due to the special nature of vehicle-mounted mobile application scenarios, some special constraints are imposed on the design of switchgear.

[0003] Currently, conventional 145kV switchgear is limited by insulation distance, and the equipment width is generally greater than 3m, which exceeds the domestic and international road width limit of 2.55m for transportation. Oversized vehicles need to submit transportation applications in advance, which is a cumbersome process. In addition, the vehicles cannot be transported on narrow roads with small turning radii, thus limiting their application scope.

[0004] Traditional mobile substations are equipped with switchgear that requires greater insulation distance due to road width requirements and higher requirements in high-altitude areas. Currently, there are no vehicle-mounted mobile substation products in the industry that meet these requirements.

[0005] In conclusion, the industry urgently needs a more compact 145kV switchgear with a width of ≤2.55mm that can cover high-altitude areas. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a compact bushing retractable composite switchgear for 145kV mobile transformers, which can solve the problem that the width of general 145kV level switchgear is generally ≥3m, which limits the application range and the insulation distance cannot meet the operating conditions in high-altitude areas.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a compact bushing retraction composite combined electrical appliance for 145kV mobile transformers, the innovation of which is: including a three-phase tank circuit breaker, a three-pole three-position isolating grounding switch, a bent busbar, a current transformer, an airtight retraction rotating device and a composite bushing.

[0008] The three-phase tank-type circuit breaker is equipped with a spring operating mechanism at one end, and has two rows of three-phase interfaces, with three single-phase interfaces at each row of three-phase interfaces; the inter-pole tilt angle of the three-phase tank-type circuit breaker is 30°, and the phase spacing is 630mm; the spring operating mechanism is powered by an output connecting rod, and the three phases are mechanically linked by inter-phase tie rods;

[0009] The current transformer has three units, which are respectively installed at three single-phase interfaces in one column of the three-phase tank circuit breaker, while no current transformer is installed at three unidirectional interfaces in the other column.

[0010] The three-pole three-position isolating grounding switch has six units, which are respectively installed on the top of three current transformers and on the three unidirectional interfaces of another row of three-phase tank circuit breakers; each three-pole three-position isolating grounding switch is equipped with an isolating grounding switch operating mechanism;

[0011] The airtight retraction rotary device has six units, which are correspondingly installed on the top of the six three-pole three-position isolation grounding switches.

[0012] The bent busbars are six in number and are correspondingly installed on the top of the airtight retractable rotary device;

[0013] The composite sleeve has six sections, which are correspondingly installed on the top of the bend busbar. The composite sleeve and the bend busbar can rotate around the central axis of the airtight retraction rotating device.

[0014] Furthermore, a control cabinet is installed on one side of the three-phase tank-type circuit breaker.

[0015] Furthermore, the airtight retraction rotation device includes an upper flange, an inner sleeve, a bearing, a skeleton oil seal, a copper sleeve, and an outer sleeve;

[0016] The upper flange is fixed to the top of the inner sleeve by bolts; the inner sleeve has a cylindrical structure and a stepped surface is provided on the outer wall of the inner sleeve; the inner sleeve is nested inside the outer sleeve, and a bearing, a skeleton oil seal and a copper sleeve are provided between the outer wall of the inner sleeve and the inner wall of the outer sleeve; a sealing end cap is provided at the end of the outer sleeve.

[0017] The advantages of this utility model are:

[0018] 1) The 145kV composite combined electrical appliance of this utility model is designed with an airtight retraction and rotation device to ensure that the product bushing rotates and switches modes without leakage of internal gas, ensuring the maximum insulation distance dimension; it can switch between transportation mode and operation mode; the overall structure is designed within the non-excessive width range, with an overall width of less than 2.55m, which is convenient for moving and carrying, and at the same time improves the safety of transportation. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of a compact bushing retractable composite switchgear for a 145kV mobile transformer according to the present invention.

[0021] Figure 2 This is a schematic diagram of the airtight retraction rotary device structure of a compact bushing retraction composite combined electrical appliance for a 145kV mobile transformer according to the present invention.

[0022] Figure 3 This is a schematic diagram of the isolating grounding switch structure of a compact bushing retractable composite combined electrical appliance for a 145kV mobile transformer according to this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] like Figures 1 to 3 The compact bushing retraction composite switchgear shown is for a 145kV mobile transformer and includes a three-phase tank circuit breaker 1, a three-pole three-position isolating grounding switch 2, a bend busbar 3, a current transformer 4, an airtight retraction rotating device 5, and a composite bushing 6.

[0026] A spring operating mechanism 11 is installed at one end of the three-phase tank-type circuit breaker 1, and the three-phase tank-type circuit breaker 1 is provided with two rows of three-phase interfaces, and each row of three-phase interfaces is provided with three single-phase interfaces; the pole tilt angle of the three-phase tank-type circuit breaker is 30°, and the phase spacing is 630mm; the spring operating mechanism 11 is powered by the output connecting rod, and the three phases are mechanically linked by the phase-to-phase tie rod.

[0027] The current transformer 4 has three units, which are installed at three single-phase interfaces in one column of the three-phase tank circuit breaker 1, while the current transformer 4 is not installed at the three unidirectional interfaces in the other column.

[0028] There are six three-pole three-position isolating grounding switches 2, which are respectively installed on the top of three current transformers and on the three unidirectional interfaces of another row of three-phase tank circuit breakers 1; each three-pole three-position isolating grounding switch 2 is equipped with an isolating grounding switch operating mechanism 21.

[0029] The airtight retraction rotation device 5 has six units, which are correspondingly installed on the top of the six three-pole three-position isolation grounding switches 2.

[0030] Six bent busbars 3 are installed on the top of the airtight retractable rotating device 5 respectively;

[0031] The composite sleeve 6 has six parts, which are correspondingly installed on the top of the bend busbar 3. The composite sleeve 6 and the bend busbar 3 can rotate around the central axis of the airtight retraction rotating device 5.

[0032] A control cabinet 12 is installed on one side of the three-phase tank-type circuit breaker 1.

[0033] The airtight retraction rotation device 5 includes an upper flange 51, an inner sleeve 52, a bearing 53, a skeleton oil seal 54, a copper sleeve 55, and an outer sleeve 56.

[0034] The upper flange 51 is bolted to the top of the inner sleeve 52; the inner sleeve 52 has a cylindrical structure and a stepped surface is provided on the outer wall of the inner sleeve 52; the inner sleeve 52 is nested inside 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 sleeve 52 and the inner wall of the outer sleeve; a sealing end cap is provided at the end of the outer sleeve 56.

[0035] The working principle of this utility model is as follows: The 145kV composite combined electrical appliance is designed with an airtight retractable rotation device, which ensures that the product bushing rotates and switches modes without leakage of internal gas, ensuring the maximum insulation distance dimension; it can switch between transportation mode and operation mode; the overall structure is designed within the non-exceeding width range, with an overall width of less than 2.55m, which facilitates the movement and carrying of the transformer, while improving the safety of transportation.

[0036] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A compact bushing-retraction combined electrical apparatus for 145 kV mobile transformer, characterized in that: The three-phase tank circuit breaker, the three-pole three-position isolation grounding switch, the bent-through bus, the current transformer, the air-tight retraction rotating device and the composite sleeve are included. One end of the three-phase tank circuit breaker is provided with a spring operating mechanism, 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 three-phase interface. The three-phase tank circuit breaker has an inter-pole inclination angle of 30° and an inter-phase distance of 630 mm. The spring operating mechanism is powered through an output connecting rod, and the three-phase tank circuit breaker is mechanically linked through inter-phase pull rods. The three-pole three-position isolation grounding switch has six, which are respectively installed on the top of the three current transformers and the three single-phase interfaces of the three-phase tank circuit breaker. Each three-pole three-position isolation grounding switch is provided with an isolation grounding switch operating mechanism. The air-tight retraction rotating device has six and is respectively installed on the top of the six three-pole three-position isolation grounding switches.

2. A compact bushing-retraction combined electrical device for 145 kV mobile transformer according to claim 1, characterized in that: The bent-through bus has six and is respectively installed on the top of the air-tight retraction rotating device.

3. A compact bushing-retraction combined electrical device for 145 kV mobile transformer according to claim 1, characterized in that: The composite sleeve has six and is respectively installed on the top of the bent-through bus. The three-phase tank circuit breaker is provided with a control cabinet on one side. The air-tight retraction rotating device includes 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 on the top of the inner cavity sleeve by bolts. The inner cavity sleeve has a cylindrical structure, and a stepped surface is arranged on the outer wall of the inner cavity sleeve. The inner cavity sleeve is nested in the outer sleeve, and the bearing, the skeleton oil seal and the copper sleeve are arranged between the outer wall of the inner cavity sleeve and the inner wall of the outer sleeve. The end of the outer sleeve is provided with a sealing end cover.

Images