Three-way shock insulation support for outdoor substation strut equipment

Abstract

The invention discloses a three-way shock insulation support for outdoor substation strut equipment. The device is characterized in that the rod core is fixedly connected to the check block, two horizontal springs are arranged at the two ends of the rod core, a force transmission sleeve is arranged in the middle of the rod core, and outer sleeves are arranged on the outer sides of the force transmission sleeve and the horizontal springs. A hole is formed in the upper side of the force transmission sleeve and connected with the force transmission rod in a riveted mode, and a horizontal hole is formed over the outer sleeve. The bottom plate is of a locally-hollowed X-shaped structure, the center of the bottom plate is a circular steel plate, the friction ring is installed above the bottom plate, and check blocks are arranged at the four corners of the bottom plate. The bottom face of the sliding unit is fixedly connected with the friction ring, the middle plate and the sliding unit are welded through a sliding unit top plate, the dowel bar penetrates through the sliding unit, eight vertical restraining rods are arranged on the periphery of the middle plate, and the vertical restraining rods are welded to the middle plate through base plates below the vertical restraining rods. Vertical springs are arranged on the outer sides of the vertical restraining rods, and top plates are arranged on the upper portions of the vertical springs. A vertical friction unit is arranged between the top plate and the vertical constraint rod and is composed of two semicircular clamps, the clamps are connected through screws, and friction plates are arranged in the semicircular clamps. The three-way shock insulation support is simple in structure, the total height of the three-way shock insulation support is two layers, the risk of derailment is avoided, and the three-way shock insulation support has good spring in-plane constraint and anti-overturning performance.

Description

Technical Field

[0001] The present application belongs to the technical field of seismic isolation of electrical equipment, and specifically relates to a three-way seismic isolation support for pillar-type equipment of an outdoor substation. Background Art

[0002] With the continuous development of power systems, pillar equipment in outdoor substations plays a vital role in ensuring power transmission and stable power supply. Pillar equipment usually includes circuit breakers, lightning arresters and disconnectors. Due to their structural characteristics, they are often high in height and bear heavy equipment loads. They are lightweight and flexible structures.

[0003] Most of the existing support structures for pillar-type equipment use steel brackets. When faced with complex seismic waves in the horizontal and vertical directions, this structure often causes equipment resonance due to its excessively high stiffness, which in turn causes equipment instability or even damage. Traditional seismic isolation buildings usually use rubber laminated bearings or friction pendulum bearings. Due to the light and high flexibility of pillar-type electrical equipment, a large overturning moment will be generated at the bottom of the equipment under the action of an earthquake. Therefore, traditional building and bridge seismic isolation bearings cannot be used for pillar-type electrical equipment. In addition, existing equipment seismic isolation technologies mostly use linear track seismic isolation devices with a total of two layers to achieve horizontal seismic isolation. Shaking table tests show that existing equipment seismic isolation bearings are prone to derailment in earthquake scenarios, and large vertical vibrations cause equipment failure.

[0004] Therefore, how to design a bearing that can reduce vertical vibration under earthquake action and has a large anti-overturning moment becomes the key to solving the seismic problem of outdoor substation pillar equipment.

[0005] Application Contents

[0006] In order to overcome the defects of the above-mentioned prior art, the purpose of the present application is to provide a three-way seismic isolation bearing for pillar-type equipment, which can meet the seismic isolation requirements of pillar-type equipment, is relatively easy to install, and occupies a small area. The three-way seismic isolation bearing can effectively reduce the impact of horizontal and vertical earthquakes and alleviate the seismic damage to the main pillar-type equipment by setting appropriate horizontal and vertical spring stiffness and friction coefficient. The top plate is embedded in the vertical constraint rod and only bears vertical forces. The middle plate is connected to the bottom plate through a sliding unit and only bears horizontal forces. The structure of the horizontal spring unit improves the anti-overturning ability of the bearing, and the outer sleeve also constrains the out-of-plane deformation of the horizontal spring during the compression and stretching process.

[0007] In order to achieve the above purpose, the technical solution adopted in this application is:

[0008] A three-way seismic isolation bearing for pillar-type equipment of an outdoor substation comprises a horizontal spring unit, a block, a horizontal force transmission rod, a sliding unit, a friction ring, a vertical constraint rod, a vertical spring, a vertical friction unit, a bottom plate, a middle plate and a top plate. The horizontal spring unit consists of a rod core, a horizontal spring, a force transmission sleeve and an outer sleeve. The rod core is fixedly connected to the block, two horizontal springs are arranged at both ends of the rod core, a force transmission sleeve is arranged in the middle of the rod core, and an outer sleeve is arranged on the outside of the force transmission sleeve and the horizontal spring.

[0009] The spring stiffness of the horizontal spring is determined by the seismic isolation requirements and equipment parameter calculation. A hole is opened on the upper side of the force transmission sleeve, which is connected to the force transmission rod by riveting. A horizontal hole is opened just above the outer sleeve to facilitate the horizontal movement of the force transmission sleeve and constrain the out-of-plane deformation of the horizontal spring.

[0010] The horizontal spring units are arranged on the four sides of a bottom plate. The bottom plate is designed as a partially hollowed-out X-shaped structure. Steel plates are set on the diagonal lines of each corner to provide support. The center of the bottom plate is connected by a circular steel plate. A friction ring is installed above the circular steel plate. Blocks are set at the four corners. The middle is a circular structure for supporting the friction ring. The height of the spring unit on one side is lower, and the height of the spring unit on the other side is higher. Pre-tensioning stress is applied when the horizontal spring is arranged to achieve self-reset of the seismic isolation bearing after an earthquake.

[0011] The force transmission rod passes through the sliding unit. When the sliding unit block is subjected to a horizontal force transmitted by the middle plate, the horizontal force is divided into two directions and transmitted to the force transmission rod.

[0012] The bottom surface of the sliding unit is fixedly connected to the friction ring, which is an annular structure. The weight of the equipment is transmitted to the bottom friction ring through the sliding unit. When the weight of the equipment is known, the friction damping is determined by the friction coefficient of the friction ring.

[0013] The middle plate and the sliding unit are welded through the top plate of the sliding unit. Eight vertical restraint rods are arranged around the middle plate, and the vertical restraint rods are welded to the middle plate through the pads below them.

[0014] A vertical spring is arranged outside the vertical restraint rod, and the vertical restraint rod limits the horizontal displacement of the top plate, so that it can only be displaced vertically. The spring stiffness of the vertical spring is determined by the weight of the equipment and the designed displacement. A top plate is arranged on the top of the vertical spring.

[0015] A vertical friction unit is arranged between the top plate and the vertical restraint rod. The vertical friction unit is composed of two semicircular clamps connected by screws. A friction plate is arranged inside the semicircular clamp. The friction damping force provided by the friction unit can be adjusted by the tightness of the clamp. Eight holes with a diameter of 200 to 300 mm are arranged around the midpoint in the middle of the top plate. The width of the holes is consistent with the base of the equipment bracket.

[0016] Beneficial effects of this application:

[0017] (1) The present application realizes three-way seismic isolation of the equipment by combining horizontal spring units with vertical spring units. This design can effectively offset the seismic forces from the horizontal and vertical directions and reduce the stress concentration of the equipment under the action of earthquakes. Pillar-type equipment usually has a high center of gravity and a large height, and is prone to significant vibration and overturning risks during earthquakes. The rod core force transfer rod design in the present application can provide vertical shear force to resist the overturning moment, which can effectively prevent the structural damage of the equipment under the action of vibration.

[0018] (2) The design adopts a two-layer structure, in which the vertical and horizontal seismic forces are borne respectively through the cooperation of vertical screws and sliding rods. Such a design not only simplifies the installation process of the equipment, but also makes the equipment adjustment more convenient. Unlike traditional large-scale seismic isolation equipment, this application is compact in design and occupies a small area, which is very suitable for installation and use in outdoor substations with limited space. This compact structure not only reduces the space occupied by the equipment, but also makes maintenance and overhaul work more convenient, greatly improving the efficiency of construction and operation.

[0019] (3) The horizontal and vertical spring stiffness can be precisely adjusted according to the actual isolation requirements and equipment parameters to ensure the best isolation effect and improve the adaptability of the support, which is suitable for a variety of different types of pillar equipment. The vertical friction unit provides adjustable friction damping by adjusting the tightness of the clamp, allowing the damping to be optimized according to different earthquake intensities or equipment weights, thereby enhancing the adaptability of the isolation system and preventing excessive displacement or vibration.

[0020] (4) The design of the horizontal force transmission rod and the sliding unit enables the horizontal force to be effectively dispersed in multiple directions, avoiding the damage of the bracket due to excessive concentrated stress. This design not only enhances the overall structural strength of the bracket, but also improves the bearing capacity of the equipment during earthquakes, ensuring that the equipment can still maintain stability under strong earthquakes. At the same time, the design of the force transmission rod can also prevent the equipment from tilting or overturning due to eccentric force, further improving the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the front view structure of the three-way seismic isolation support for outdoor substation pillar equipment provided in this application;

[0022] Figure 2 A side view structural diagram of a three-way seismic isolation support for outdoor substation pillar equipment provided in this application;

[0023] Figure 3 A schematic diagram of a horizontal spring unit of a three-way seismic isolation support for outdoor substation pillar equipment provided in this application;

[0024] Figure 4 A top view of the first floor of the three-way seismic isolation support for outdoor substation pillar equipment provided in this application;

[0025] Figure 5 A top view of the second floor of the three-way seismic isolation support for outdoor substation support equipment provided in this application;

[0026] Figure 6 A schematic diagram of the structure of the three-way seismic isolation bearing for outdoor substation pillar equipment provided in this application.

[0027] In the figure: 1. horizontal spring; 2. rod core; 3. force transmission sleeve; 4. outer sleeve; 5. stopper; 6. bottom plate; 7. force transmission rod; 8. sliding unit; 9. friction ring; 10. middle plate; 11. screw; 12. vertical constraint rod; 13. vertical spring; 14. top plate; 15. semicircular clamp; 16. friction plate. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings.

[0029] See also Figure 1-6 The present application discloses a three-way seismic isolation bearing for pillar-type equipment of outdoor substations, which can meet the seismic isolation requirements of outdoor pillar equipment and can effectively alleviate the impact of earthquakes on equipment. The three-way seismic isolation bearing includes a rod core 2, a horizontal spring 1, a force transmission sleeve 3, a force transmission rod 7, an outer sleeve 4, a sliding unit 8, a bottom plate 6, a block 5, a middle plate 10, a friction ring 9, a vertical constraint rod 12, a vertical spring 13, a top plate 14, a semicircular clamp 15, a screw 11, and a friction plate 16. It can bear horizontal and vertical forces at the same time, and reduce the damage of earthquakes to equipment through reasonable design.

[0030] Horizontal springs 1 are provided at both ends of the rod core 2, a force transmission sleeve 3 is installed in the middle of the rod core 2, the force transmission sleeve 3 is connected to the force transmission rod 7 by riveting, an outer sleeve 4 is provided on the outside of the force transmission sleeve 3, and a horizontal hole is opened on the upper side of the outer sleeve 4 to facilitate the sliding of the force transmission sleeve 3. The sliding unit 8 is installed between the bottom plate 6 and the middle plate 10, and contacts the bottom plate 6 by rubbing through the friction ring 9.

[0031] For example, the sliding unit 8 is provided with vertical holes at different heights in the horizontal X direction and the Y direction, and the force transmission rod 7 passes through the hole. The spring stiffness of the horizontal spring 1 can be determined by the seismic isolation requirement and the equipment parameter calculation, and pre-tension stress is applied during the arrangement to enhance the self-resetting ability of the support after the earthquake.

[0032] The vertical part is composed of a vertical restraining rod (12) and a vertical spring (13), wherein the vertical spring (13) is arranged outside the vertical restraining rod (12), and the top plate (14) is fixed to the upper part of the vertical spring (13); the semicircular clamp (15), the screw (11) and the friction plate (16) are used to provide vertical friction damping.

[0033] For example, the operator can place the base plate 6 on the equipment foundation to ensure that the base plate is stable and horizontally aligned. Blocks 5 are set at the four corners of the base plate 6 to limit the horizontal displacement of the spring 1 and the force transmission sleeve 3 and enhance the stability of the equipment. The sliding unit 8 is installed between the middle plate 10 and the base plate 6 to transmit horizontal force. The top surface of the sliding unit 8 is welded to the middle plate 10, and the bottom surface of the sliding unit 8 is glued to the friction ring 9, and the friction ring 9 is in contact with the base plate 6. The friction coefficient of the friction ring 9 is determined by the weight of the equipment and the seismic isolation requirements. The weight of the equipment is transmitted to the sliding unit 8 through the middle plate 10, and the friction ring 9 generates friction with the base plate 6, thereby realizing friction energy dissipation under the action of earthquake.

[0034] The vertical part is realized by the vertical restraint rod 12 and the vertical spring 13. The stiffness of the vertical spring 13 is determined by the weight of the equipment and the design displacement. The upper part of the vertical restraint rod 12 passes through the top plate 14. The vertical friction unit is composed of two semicircular clamps 15. The semicircular clamps 15 are fastened by screws 11. Friction plates 16 are arranged inside the semicircular clamps 15. The friction force can be adjusted according to the needs of the equipment to provide appropriate vertical friction damping. The operator can tighten the screws (11) according to the needs of the equipment to provide appropriate vertical friction damping and enhance the seismic isolation effect.

[0035] Eight holes with a diameter of 200-300 mm are arranged in the middle of the top plate 14 for fixing the base of the support brackets of different pillar-type equipment. The design of these holes not only ensures the stability of the equipment, but also makes it more convenient during installation and commissioning.

[0036] It should be noted that the spring stiffness of the horizontal spring unit 1 is determined by the seismic isolation requirement and the equipment parameter calculation; the stiffness of the vertical spring 13 is determined by the equipment weight and the design displacement.

[0037] How this application works:

[0038] When the present application is working, the horizontal spring 1 is connected to the force transfer rod 7 through the force transfer sleeve 3. The horizontal spring 1 is pre-stressed when arranged. The outer sleeve 4 provides in-plane deformation constraints for the horizontal spring 1 and the force transfer sleeve 3. The block 5 provides lateral support for the horizontal spring 1. The force transfer rod 7 is connected to the block 5 through the rod core 2 to provide anti-overturning ability for the support. The sliding unit 8 is in contact with the bottom plate 6 through the friction ring 9, and friction damping is used to slow down the horizontal shaking of the equipment. The friction coefficient of the friction ring 9 is determined by the weight of the equipment and the seismic isolation requirements. The vertical part of the second floor works together through the vertical constraint rod 12 and the vertical spring 13. The dead weight of the equipment is borne by the vertical spring 13, and the spring stiffness is adjusted according to the weight of the equipment and the design displacement. The vertical friction unit is composed of two semicircular clamps 15. By adjusting the tightness of the screw 11, the clamp can adjust the friction force, thereby providing appropriate vertical damping. When vertical vibration occurs, the vertical spring 13 and the friction plate 16 work together to reduce the impact of vertical seismic force on the equipment. The operator can tighten the screw (11) according to the equipment requirements to provide appropriate vertical friction damping and enhance the seismic isolation effect. The holes on the top plate 14 provide a convenient installation solution for fixing the equipment bracket base, thereby ensuring the stability of the equipment during installation and operation.

Claims

1. A three-way seismic isolation support for outdoor substation support equipment, characterized in that: The invention comprises the following components: a horizontal spring (1), a rod core (2), a force transmission sleeve (3), an outer sleeve (4), a stopper (5), a bottom plate (6), a force transmission rod (7), a sliding unit (8), a friction ring (9), a middle plate (10), a screw (11), a vertical constraint rod (12), a vertical spring (13), a top plate (14), a semicircular clamp (15) and a friction plate (16), wherein: the rod core (2) is provided with horizontal springs (1) at both ends and a force transmission sleeve (3) in the middle, and the outer sleeve ( 4) is arranged on the outside of the force transmission sleeve (3); the sliding unit (8) is installed between the bottom plate (6) and the middle plate (10), and contacts the bottom plate (6) through the friction ring (9); the vertical part is composed of a vertical constraint rod (12) and a vertical spring (13), wherein the vertical spring (13) is arranged on the outside of the vertical constraint rod (12), and the top plate (14) is fixed to the upper part of the vertical spring (13); the semicircular clamp (15), the screw (11) and the friction plate (16) are used to provide vertical friction damping.

2. The three-way seismic isolation support for pillar equipment of outdoor substation according to claim 1 is characterized in that: A horizontal hole is provided on an outer sleeve (4), and the hole design enables the force transmission sleeve (3) and the horizontal spring (1) to move horizontally only inside the outer sleeve (4).

3. The three-way seismic isolation support for pillar equipment of outdoor substation according to claim 1 is characterized in that: The bottom plate (6) is fixed on the equipment foundation, and a stopper (5) is arranged on the bottom plate (6). The stopper (5) is located at the four corners of the bottom plate (6), and the sliding unit (8) is connected to the stopper (5) through a force transmission rod (7), a force transmission sleeve (3), and a rod core (2).

4. The three-way seismic isolation support for pillar equipment of outdoor substation according to claim 1 is characterized in that: The top surface of the sliding unit (8) is connected to the middle plate (10) by welding, and a friction ring (9) is glued below the bottom surface of the sliding unit (8), and the friction ring (9) is in contact with the bottom plate (6).

5. The three-way seismic isolation support for pillar equipment of outdoor substation according to claim 1 is characterized in that: The upper part of the vertical restraining rod (12) passes through the top plate (14), and the vertical friction unit is composed of two semicircular clamps (15), and a friction plate (16) is arranged inside the clamp (15); the screw (11) is configured to: control the friction force provided by the friction plate (16) according to the requirements of the three-way seismic isolation support of the outdoor substation pillar equipment.

6. The three-way seismic isolation support for pillar equipment of outdoor substation according to claim 1 is characterized in that: The middle of the top plate (14) is provided with eight holes with a diameter of 200-300 mm, which are used to fix the bases of the support brackets of different pillar-type equipment.

7. The three-way seismic isolation support for pillar equipment of outdoor substation according to claim 1 is characterized in that: The spring stiffness of the horizontal spring unit (1) is determined by the seismic isolation requirement and equipment parameter calculation; the stiffness of the vertical spring (13) is determined by the equipment weight and the design displacement.

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