Prefabricated high-voltage insulation seismic mitigation and isolation device

Abstract

The invention discloses a prefabricated assembly type high-voltage insulation seismic mitigation and isolation device. Comprising a plurality of post insulators installed between an upper structure and a lower structure, the plurality of post insulators are arranged in a longitudinal and transverse array, the outer side of each post insulator is sleeved with two insulating rubber sleeves, the outer side of each insulating rubber sleeve is provided with a GFRP hoop, a connecting piece is reserved on each GFRP hoop, and the GFRP hoops are connected with the connecting pieces. The GFRP hoops on the insulation rubber sleeves on the outer sides of every two adjacent post insulators are connected through the mechanical passive dampers, flange plates are installed on the upper portion and the lower portion of each post insulator, an insulation rubber cushion layer is overlaid on each flange plate, and flange bolts penetrate through the flange plates and the insulation rubber cushion layers to fix the post insulators to the top plates on the upper side and the lower side. The device solves the problem of secondary disasters caused by electric leakage of high-voltage electric appliances in the ultrahigh-voltage environment, and the device is composed of prefabricated parts, so that the construction time is greatly shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and in particular to a prefabricated and assembled high-voltage insulating and shock-isolating device. Background Art

[0002] High-voltage power facilities are the core components of the power system. Their importance is reflected in their key supporting role in energy security, economic operation, social stability and sustainable development.

[0003] High-voltage electrical equipment is typically heavy and has a high center of gravity, which can easily generate large overturning moments during earthquakes, placing extremely high demands on the tensile strength of seismic isolation devices. Traditional rubber seismic isolation bearings have poor tensile strength and are easily damaged. Furthermore, the porcelain insulators in the equipment have poor deformation capacity and are unable to dissipate energy through plastic deformation. They are prone to direct fracture due to small displacements or resonance during earthquakes, requiring the seismic isolation system to strictly limit displacement. Therefore, this invention uses post insulators, which serve both as seismic isolation bearings and as insulating components.

[0004] However, since the above-mentioned post insulators need to play the role of seismic isolation supports, composite materials need to be used as insulator materials, which is relatively expensive.

[0005] Chinese patent publication number CN115898117A discloses a seismic isolation device for transmission tower feet. The device comprises an upper top plate, a lower bottom plate, and a seismic isolation support. The seismic isolation support comprises an upper deck, a lower deck, and a corrugated flexible protective shell. The corrugated flexible protective shell is connected to the upper and lower decks at both ends. A slider body is provided inside the slider body. A pivot ball is provided on the bottom surface of the upper deck. The spherical portion of the pivot ball is embedded in a receiving cavity of the slider body and rotates freely within the cavity. A limit portion and a sliding groove are provided on the bottom surface of the slider body. A sliding pedestal is provided below the sliding groove. The top surface of the sliding pedestal is recessed inwardly to form a limit groove at the center. The limit portion on the bottom surface of the slider body is placed in the limit groove. A sliding ball is embedded in the sliding groove. The bottom of the sliding ball is closely attached to the top surface of the sliding pedestal. A viscoelastic pad is provided on the bottom of the sliding pedestal. The viscoelastic pad, the lower deck, and the lower bottom plate are fixedly connected in sequence. The present invention achieves seismic isolation protection for transmission towers, effectively reducing damage to the transmission tower structure caused by earthquake disasters. However, the device is not insulated and can only be used on the base of transmission towers. It is not suitable for most high-voltage electrical equipment.

[0006] A Chinese patent with the announcement number CN119541968A discloses a rubber sleeve for connecting high-voltage insulators, comprising: a sealing portion, which is arranged on the inner side of the connecting rubber sleeve and fits against the surface of the insulator; an outer portion, which is an integral structure with the sealing portion; and a reinforcing portion, which is arranged between the sealing portion and the outer portion and is used to support the sealing portion and the outer portion. The embodiment of the present invention provides a rubber sleeve for connecting high-voltage insulators, which is divided into a sealing portion and a reinforcing portion, and a reinforcing portion is added between the two, thereby improving the mechanical strength and durability of the connecting rubber sleeve. During the process of connecting / fixing with the connecting rubber sleeve, the sealing portion forms a sealing surface with the surface of the insulator, thereby effectively overcoming the situation where the insulator discharges and / or short circuits. At the same time, due to the addition of the reinforcing portion, the stable support of the insulator can be guaranteed. However, the above-mentioned method of adding the rubber sleeve also has certain shortcomings. The existing rubber sleeve cannot fit tightly with the insulator.

[0007] Power facilities have diverse structures (such as steam turbine units, capacitor banks, high-voltage equipment, etc.), and isolation solutions need to be selected in a targeted manner. Rotating equipment (such as coal mills and pump units) use metal spring isolators to take into account both bearing capacity and shock absorption efficiency. Precision electrical equipment (such as circuit breakers and lightning arresters) need to be combined with rubber bearings and hysteresis dampers to reduce seismic displacement response, but traditional isolation devices are complex to construct and have a single application scenario. Therefore, the present invention provides an assembled insulating isolation device that is easy to construct and can be used to install a variety of electrical equipment under different site conditions. Summary of the Invention

[0008] Purpose of the invention: The present invention provides a prefabricated and assembled high-voltage insulation and seismic isolation device to solve the problem of secondary disasters caused by leakage of high-voltage electrical appliances in ultra-high voltage environments. In addition, the device is composed of prefabricated components, which greatly shortens the construction time.

[0009] The above purpose is achieved through the following technical solutions: A prefabricated and assembled high-voltage insulating and seismic isolation device comprises a plurality of post insulators installed between an upper and a lower structure. The plurality of post insulators are arranged in a vertical and horizontal array. Two insulating rubber sleeves are sleeved on the outside of each post insulator. A GFRP clamp is arranged on the outside of each insulating rubber sleeve. A connector is reserved on the GFRP clamp. The GFRP clamps on the insulating rubber sleeves on the outsides of two adjacent post insulators are connected by a mechanical passive damper. A flange is installed on the upper and lower parts of each post insulator. A layer of insulating rubber pad is superimposed on the flange. Flange bolts pass through the flange and the insulating rubber pad to fix the post insulator to the top plates on the upper and lower sides.

[0010] Furthermore, a connecting piece is reserved on the GFRP clamp, and the mechanical passive damper is fixed to the connecting piece with screws.

[0011] Furthermore, a plurality of bolt holes are provided on the side of the insulating rubber sleeve, and high-strength bolts are passed through the bolt holes to further fix the insulating rubber sleeve (3) on the post insulator.

[0012] Furthermore, the mechanical passive damper is obliquely connected between two post insulators, that is, the mechanical passive damper is connected to the GFRP clamp on the upper insulating rubber sleeve outside one post insulator and the GFRP clamp on the lower insulating rubber sleeve outside the adjacent post insulator.

[0013] The present invention has the following advantages: 1. All components of the present invention are connected by convenient bolt connections. The energy-consuming components are inexpensive and easy to assemble. They can be mass-produced in factories and can be disassembled and reused after an earthquake, thus reducing the cost of repairing buildings after an earthquake.

[0014] 2. This invention uses support insulators directly connected to the upper structure, effectively blocking leakage current from the upper electrical components to the lower structure. This prevents the vibration test bench from burning out or causing other secondary hazards such as fire and explosion risks, or cross-regional cascading tripping. It also protects the damper from the effects of high voltage, ensuring its proper function in reducing and isolating vibrations.

[0015] 3. The pillar insulator adopts a combination of high-voltage insulating rubber sleeves covered on the outer surface and dampers. Due to the extremely high resistivity of the rubber itself, the influence of ultra-high voltage on the damper is further blocked. The high elasticity, large deformation capacity and automatic reset ability of the rubber material itself can also further dissipate energy and improve the platform's seismic isolation effect.

[0016] 4. This invention utilizes mechanical passive dampers, characterized by their lack of electronic components, simple structure, strong aging resistance, and guaranteed long-term effectiveness. These dampers are arranged as diagonal braces between the post insulators, enhancing the structural integrity and stability, as well as its load-bearing capacity and seismic resistance.

[0017] 5. The present invention utilizes post insulators as the supporting structure, which offer excellent compressive strength and load-bearing capacity. The composite material provides strong pullout resistance and anti-overturning capabilities. These are then connected via mechanical passive dampers, providing excellent lateral and vertical shock absorption. The insulating rubber sleeves covering the insulators further enhance the device's lateral shock absorption capabilities, enabling it to better protect electrical equipment during earthquakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the prefabricated and assembled insulation and seismic isolation device of the present invention; Figure 2 It is a front view of the prefabricated and assembled insulation and seismic isolation device of the present invention; Figure 3 For Figure 1 An enlarged view of the connection between the post insulator and the damper; Figure 4 This is an enlarged view of the flange bolt connection.

[0019] In the figure: 1. Upper top plate; 2. Post insulator; 3. High-voltage insulating rubber sleeve; 4. Flange; 5. Mechanical passive damper; 6. GFRP clamp; 7. Insulating rubber pad; 8. Bolt hole; 9. High-strength bolt; 10. Screw; 11. Flange bolt. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below with reference to specific examples and drawings. The specific implementation methods described herein are only used to explain the relevant content, and are not intended to limit the present invention.

[0021] Combine Figure 1 , Figure 2 , Figure 3 The prefabricated and assembled high-voltage insulation and seismic isolation device of this embodiment includes a plurality of post insulators 2, a plurality of high-voltage insulation rubber sleeves 3, and a plurality of dampers 5. Each post insulator is covered with two insulation sleeves 3, and a GFRP clamp 6 is arranged on the outer side of the insulation sleeve. A connecting piece is reserved on the GFRP clamp 6, and then the mechanical passive damper 5 is fixed to the connecting piece with a screw 10. The insulation sleeve 3 is also provided with a plurality of bolt holes, and high-strength bolts 9 are passed through the bolt holes to further fix the insulation sleeve 3 to the post insulator 2. Each post insulator 2 is installed with a flange 4 on the upper and lower parts. The flange 4 is superimposed with a layer of insulation rubber gasket 7. The flange bolts 11 pass through the flange and the insulation rubber gasket 7 to fix the post insulator 2 to the upper and lower top plates 1.

[0022] See Figure 3 As shown, when the damper is assembled, the GFRP clamp 6 is first arranged on the outer side of the insulating rubber sleeve 3, and a connecting piece is reserved at the corresponding position of the GFRP clamp 6 so that the cylindrical mechanical passive damper 5 is just stuck in the connecting piece, and then it is fixed to the connecting piece with screws 10.

[0023] Combine Figure 1 , Figure 4 , pre-embed the flange 4 in the upper and lower top plates 1, and then connect them through the bolt holes 8 on the flange 4 through the flange bolts 11. It is worth noting that a rubber pad 7 needs to be installed between the flanges.

[0024] The working mechanism of this embodiment is as follows: first, the spacing between each post insulator 2 is determined based on the span and depth of the superstructure (upper roof), and then the appropriate composite insulator material is selected based on the working environment. The composite material's excellent compressive and pull-out resistance is the basis for the device's application in electrical facilities. The post insulator 2 is firmly fixed between the upper and lower roof plates 1 by flange bolts 11. The upper and lower roof plates 1 are made of reinforced concrete, and their high strength and corrosion resistance effectively disperse the mechanical stresses exerted on the post insulator 2. An insulating rubber pad 7 is added between the flange bolts 11 and the upper and lower roof plates 1. The compression of the flange bolts 11 causes plastic deformation, tightening the structural connection and dissipating compressive stress, further protecting the post insulator 2. The post insulator 2 is covered with a high-voltage insulating rubber sleeve 3. An adhesive layer is added between the high-voltage insulating rubber sleeve 3 and the post insulator 2, and high-strength bolts 9 are installed. The high-voltage insulating rubber sleeve 3 is fixed to the post insulator 2 by GFRP clamps 6, ensuring a closer fit and reducing partial discharge. During an earthquake, the colloid in the adhesive layer can absorb energy immediately, and the high-voltage insulating rubber sleeve 3 can also absorb horizontal earthquake energy. The mechanical passive damper 5 uses the screws 10 and the GFRP clamp 6 to clamp it between the support insulators 2. During an earthquake, the mechanical passive damper 5 can rotate slightly around the screws 10 to dissipate the earthquake energy. Its diagonal bracing arrangement increases the integrity and stability of the device, and improves the device's load-bearing capacity and earthquake resistance. The advantages of the mechanical passive damper 5 are that it has no electronic components, a simple structure, strong anti-aging performance, excellent energy dissipation performance, and is not subject to electromagnetic interference, which can ensure the long-term effectiveness of the device. During an earthquake, the mechanical passive damper 5 can dissipate earthquake energy together with the above-mentioned high-voltage insulating rubber sleeve 3 and insulating rubber cushion 7.

Claims

1. A prefabricated high-voltage insulation and seismic isolation device, characterized in that: The invention comprises a plurality of post insulators (2) installed between an upper structure and a lower structure, wherein the plurality of post insulators (2) are arranged in a vertical and horizontal array, two insulating rubber sleeves (3) are sleeved on the outer side of each post insulator (2), a GFRP clamp (6) is arranged on the outer side of each insulating rubber sleeve (3), and a connector is reserved on the GFRP clamp (6), and the GFRP clamp (6) on the insulating rubber sleeves (3) on the outer sides of two adjacent post insulators (2) are connected through a mechanical passive damper (5), and each post insulator (2) is installed with a flange (4) on the upper and lower parts, and a layer of insulating rubber pad (7) is superimposed on the flange (4), and flange bolts (11) pass through the flange and the insulating rubber pad (7) to fix the post insulator (2) to the top plate (1) on the upper and lower sides.

2. The prefabricated high-voltage insulation and seismic isolation device according to claim 1, characterized in that: A connecting piece is reserved on the GFRP hoop (6), and the mechanical passive damper (5) is fixed to the connecting piece using screws (10).

3. The prefabricated high-voltage insulation and seismic isolation device according to claim 1, characterized in that: A plurality of bolt holes are provided on the side of the insulating rubber sleeve (3), and high-strength bolts (9) are passed through the bolt holes to further fix the insulating rubber sleeve (3) to the post insulator (2).

4. The prefabricated high-voltage insulation and seismic isolation device according to claim 1, characterized in that: The mechanical passive damper (5) is connected obliquely between two post insulators, that is, the mechanical passive damper is connected to a GFRP clamp (6) on the upper insulating rubber sleeve (3) outside one post insulator (2) and to a GFRP clamp (6) on the lower insulating rubber sleeve (3) outside the adjacent post insulator (2).

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