Multi-stable-state flexible supporting device suitable for tunnel GIL pipeline to resist large deformation

Abstract

The invention discloses a multi-stable-state flexible supporting device suitable for large deformation resistance of a tunnel GIL pipeline. The multi-stable-state flexible supporting device comprises a horizontal supporting unit, a vertical supporting unit and a connecting unit. The horizontal supporting unit and the vertical supporting unit are each provided with a supporting device, each supporting device is composed of an upper-layer dislocation component, a lower-layer dislocation component and a middle dislocation component, the upper-layer dislocation component, the lower-layer dislocation component and the middle dislocation component are in meshed connection in a relative dislocation mode through a gear structure, and the middle dislocation component is arranged between the upper-layer dislocation component and the lower-layer dislocation component in a clamped mode. The connecting unit is matched with the GIL pipeline and fixed to the middle dislocation component of the horizontal supporting unit. Through the synergistic effect of double units, synchronous adaptation of horizontal and vertical bi-directional dislocation displacement is achieved, deformation energy is absorbed through friction damping generated by gear meshing dislocation, the displacement amplitude of the GIL pipeline is effectively reduced, dislocation damage is avoided, the structure is stable, installation is convenient and fast, and the requirement for large deformation resistance of the long-distance GIL pipeline is met.

Description

Technical Field

[0001] This invention relates to the field of GIL pipeline support device technology, and more specifically, to a multi-stable flexible support device suitable for tunnel GIL pipelines to resist large deformations. Background Technology

[0002] Gas-insulated metal-enclosed transmission lines (GILs), a new type of gas-insulated metal-enclosed transmission line, are widely used in ultra-high voltage (UHV) and extra-high voltage (EHV) power transmission worldwide due to their excellent reliability, environmental adaptability, ease of operation and maintenance, and large transmission capacity. Currently, the global installed length of GILs exceeds thousands of kilometers. GIL transmission pipelines are widely used in the UHV and EHV transmission fields as a new type of transmission line equipment to replace traditional overhead transmission lines. Although the failure rate of GILs is relatively low, due to their high operating voltage level and crucial role in power transmission, a failure can have serious consequences for the equipment itself and surrounding equipment, thereby affecting the overall operational safety of the power grid and causing significant loss of life and property.

[0003] Currently, gas-insulated pipelines (GILs) are widely deployed in underground tunnels and are significantly affected by earthquakes and vibrations. During strong earthquakes, the ground and soil may deform. Given the long length of the GIL lines, soil deformation can cause tunnel misalignment, which in turn can lead to GIL misalignment, ultimately damaging the GIL equipment. Adding flexible support devices to the supports of the GIL pipelines in the tunnel to increase the damping level of the GIL pipeline supports is currently the most effective method to reduce the large deformation of the GIL pipelines caused by earthquakes and the resulting misalignment.

[0004] However, existing support devices for tunnel GIL pipelines have significant drawbacks: the support devices can only provide buffering for deformation in a single horizontal or vertical direction, and cannot achieve coordinated adaptation of horizontal and vertical displacement, making it difficult to cover the full-dimensional displacement scenarios of pipelines caused by tunnel deformation; at the same time, the damping effect of the existing support device's displacement structure is limited, and it cannot effectively absorb deformation energy under extreme conditions such as strong earthquakes, making it difficult to meet the large deformation resistance requirements of long-distance GIL pipelines, and easily causing pipeline breakage and damage. Summary of the Invention

[0005] The present invention provides a multi-stable flexible support device for tunnel GIL pipelines to resist large deformations. The problem to be solved is that the existing tunnel GIL pipeline support devices are difficult to adapt to both horizontal and vertical displacement at the same time. As a result, when the tunnel is deformed by geological activities such as earthquakes, it cannot effectively buffer the bidirectional displacement of the pipeline, which can easily lead to GIL pipeline breakage and damage, thereby affecting the safety of power transmission.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A multi-stable flexible support device suitable for large deformation resistance of tunnel GIL pipelines, including Horizontal support unit, used to accommodate horizontal displacement of GIL pipeline; Vertical support unit, connected to horizontal support unit, is used to accommodate vertical displacement of GIL pipeline; The connecting unit is connected to the horizontal support unit at one end and is used for detachable connection to the GIL pipeline at the other end.

[0007] Furthermore, both the horizontal support unit and the vertical support unit are equipped with support devices. The support devices have the same structure and are installed horizontally on the horizontal support unit and vertically on the vertical support unit, respectively.

[0008] Furthermore, the support device includes an upper misaligned component, a lower misaligned component, and a middle misaligned component. Both the upper and lower misaligned components are provided with an interlocking structure, and the upper and lower sides of the middle misaligned component are provided with a matching structure that adapts to the interlocking structure. The middle misaligned component is sandwiched between the upper and lower misaligned components, and the interlocking connection that can be relatively misaligned is achieved through the interlocking structure and the matching structure.

[0009] Furthermore, both the meshing structure and the mating structure are gear structures, and the top of the gear is a smooth curved surface.

[0010] Furthermore, the support device is also equipped with a limiting baffle, which is installed on the outside of the upper and lower misaligned components to restrict the intermediate misaligned components from disengaging. The limiting baffle is equipped with a baffle fixing hole for fixing the limiting baffle.

[0011] Furthermore, the intermediate misaligned component has a planar segment along the vertical direction of the mating structure section, and the connecting unit is fixedly installed at the planar segment.

[0012] Furthermore, the horizontal support unit and the vertical support unit are respectively provided with a horizontal support shell and a vertical support shell. The horizontal support shell and the vertical support shell are fixedly connected by an L-shaped metal sheet. The vertical support shell is provided with bolt holes and is fixedly connected to the tunnel wall through the bolt holes. The upper and lower sliding components are both provided with component fixing holes and are fixedly connected to the horizontal support shell and the vertical support shell through the component fixing holes.

[0013] Furthermore, the horizontal and vertical support shells are hollow structures with cross-sectional shapes of U-shape, arc shape, or combined curved surface, and the top surfaces of the horizontal and vertical support shells are provided with notches.

[0014] Furthermore, the connecting unit includes a fitting part adapted to the shape of the GIL pipeline and a fixing part connected to the intermediate misalignment member. The fitting part has a ring-shaped, semi-ring-shaped or arc-shaped structure, and the fixing part is provided with assembly holes.

[0015] Furthermore, at least two sets of upper-layer sliding members and lower-layer sliding members are provided in parallel.

[0016] The beneficial effects of this invention are as follows: 1. This invention achieves synchronous adaptation to the horizontal and vertical displacement of GIL pipelines through the combined design of horizontal and vertical support units, fully covering pipeline displacement scenarios caused by tunnel deformation, filling the technical gap of unidirectional deformation resistance of existing support devices, and greatly improving the ability of GIL pipelines to resist large deformations under complex geological conditions.

[0017] 2. The support device of this invention absorbs deformation energy through the flexible meshing and misalignment of the gear structure. Combined with the characteristics of distributed installation, it can effectively attenuate the vibration caused by dynamic loads such as earthquakes, significantly reduce the displacement amplitude of GIL pipelines, reduce the probability of pipeline breakage and damage, and ensure the continuity and safety of ultra-high voltage and extra-high voltage power transmission. Moreover, the device has a simple structure, is easy to install, and is suitable for the laying requirements of long-distance GIL pipelines. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a structural schematic diagram of a multi-stable flexible support device for tunnel GIL pipelines to resist large deformation according to the present invention; Figure 2 This is a schematic diagram of the structure of the horizontal support unit and the vertical support unit in this invention; Figure 3 This is a schematic diagram of the support device in this invention; Figure 4 This is a schematic diagram of the structure of the intermediate misaligned component in this invention; Figure 5 This is a schematic diagram of the connection unit in this invention.

[0019] In the diagram: 1-Horizontal support shell; 2-Vertical support shell; 21-Bolt hole; 3-Support device; 31-Upper sliding member; 32-Lower sliding member; 33-Intermediate sliding member; 34-Gear; 35-Planar section; 36-Component fixing hole; 4-Connecting unit; 41-Fitting part; 42-Fixing part; 43-Assembly hole; 5-Limiting baffle; 51-Baffle fixing hole; 6-Notch; 7-L-shaped metal sheet; 8-GIL pipeline. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] like Figures 1 to 5 As shown, this invention provides a multi-stable flexible support device 3 suitable for large deformation resistance of tunnel GIL pipelines. It includes a horizontal support unit, a vertical support unit, and a connecting unit 4. The horizontal support unit is used to adapt to the horizontal displacement of the GIL pipeline 8. There are two sets of vertical support units, located at both ends of the horizontal support unit, which are used to adapt to the vertical displacement of the GIL pipeline 8. One end of the connecting unit 4 is connected to the horizontal support unit, and the other end is used for detachable connection with the GIL pipeline 8.

[0022] The horizontal support unit has a horizontal support shell 1, and the vertical support unit has a vertical support shell 2. The horizontal support shell 1 and the vertical support shell 2 are connected and fixed by L-shaped metal plates 7 and bolts to form a complete two-way support structure. The support shells have the same structure and are hollow. Their cross-sectional shape can be U-shaped, arc-shaped or combined curved metal tubes according to the seismic stiffness requirements. The top surface has a notch 6. The upper and lower metal surfaces of the support shells have holes for easy fixing and installation of the support device 3. The hole positions can be determined according to the installation requirements of the GIL pipeline 8. At the same time, one side of the vertical support shell 2 has bolt holes 21. The vertical support shell 2 is fixedly connected to the tunnel wall by bolts through the bolt holes 21.

[0023] Both the horizontal and vertical support units are equipped with identical support devices 3, which are installed horizontally inside the horizontal support housing 1 and vertically inside the vertical support housing 2, respectively. Each support device 3 includes an upper sliding member 31, a lower sliding member 32, a middle sliding member 33, and a limiting baffle 5. Both the upper and lower sliding members 31 and 32 have member fixing holes 36, which are used to fix them to the horizontal and vertical support housings 1 and 2, respectively. Both the upper and lower sliding members 31 and 32 have interlocking structures. The middle sliding member... Both the upper and lower sides of 33 are provided with a matching structure for the interlocking structure. At least two sets of upper misaligned members 31 and lower misaligned members 32 are provided in parallel. The middle misaligned member 33 is sandwiched between the two and maintains a natural pressure state. The interlocking structure and the matching structure realize a relatively misaligned interlocking connection. The limiting baffle 5 is provided with a baffle fixing hole 51. The limiting baffle 5 is installed on the outside of the upper misaligned member 31 and the lower misaligned member 32 through the baffle fixing hole 51 to limit the middle misaligned member 33 and prevent it from detaching from the upper misaligned member 31 and the lower misaligned member 32.

[0024] In this embodiment, both the meshing structure and the mating structure are gear 34 structures, and the top of the gear 34 is a smooth curved surface; that is, the upper misaligned member 31 and the lower misaligned member 32 are cuboid metal blocks with a gear 34 on one side and a smooth curved surface at the top of the gear 34; the middle misaligned member 33 is a cuboid metal block with gears 34 on both the upper and lower sides and a smooth curved surface at the top of the gear 34, and the middle part of the middle misaligned member 33 along the vertical direction of the cross section of the smooth gear 34 is a planar segment 35, forming an integrated structure of smooth gear 34 surface - planar segment 35 - smooth gear 34 surface. The middle misaligned member 33 is naturally pressed and clamped between the upper misaligned member 31 and the lower misaligned member 32, and the meshing connection that can be relatively misaligned is achieved through the gear 34 structure. The limiting baffle 5 exceeds the maximum vertex position of the gear 34 and is used to limit the middle misaligned member 33 from sliding out and avoid disengaging from the meshing engagement.

[0025] One end of the connecting unit 4 is connected to the intermediate misalignment member 33 in the horizontal support unit, and the other end is detachably connected to the GIL pipeline 8. The connecting unit 4 includes a fitting part 41 adapted to the GIL pipeline 8 and a fixing part 42 connected to the intermediate misalignment member 33. The shape of the fitting part 41 can be adapted to different shapes according to the GIL pipeline 8, such as a ring, semi-ring or arc structure, to adapt to the size of the GIL pipeline 8. The fixing part 42 is provided with a mounting hole 43, which is fixedly connected to the plane section 35 of the intermediate misalignment member 33 by bolts.

[0026] This invention utilizes the synergistic effect of horizontal and vertical support units to address the horizontal and vertical displacements of the GIL pipeline 8, respectively. The core mechanism employs frictional damping generated by the meshing and shifting of gears 34 to absorb deformation energy, achieving resistance to large deformations. The specific working principle is as follows: Horizontal deformation resistance working principle: When the tunnel is affected by geological activity and undergoes horizontal deformation, the deformation force is transmitted to the GIL pipeline 8, causing horizontal displacement of the pipeline. The horizontal displacement of the GIL pipeline 8 is transmitted to the intermediate displacement member 33 in the horizontal support unit through the connecting unit 4. Since the intermediate displacement member 33 is connected to the upper displacement member 31 and the lower displacement member 32 through the meshing of the gear 34 structure, and the top of the gear 34 is a smooth curved surface, the intermediate displacement member 33 moves synchronously with the horizontal displacement of the pipeline and undergoes relative flexible displacement with the upper and lower displacement members 32. During the displacement process, the frictional damping generated by the contact surface of the gear 34, combined with the natural pressure preload of the intermediate displacement member 33, absorbs the deformation energy in the horizontal direction and effectively attenuates the horizontal displacement amplitude of the pipeline.

[0027] Vertical deformation resistance working principle: When the tunnel undergoes vertical deformation (such as settlement or uplift), the deformation force is transmitted to the vertical support unit through the tunnel wall. Specifically, the vertical support shell 2 is fixedly connected to the tunnel wall. The vertical deformation of the wall directly drives the vertical support shell 2 to deform synchronously, and then transmits it to the upper misalignment member 31 and the lower misalignment member 32 in the vertical support unit. Although the vertical direction is constrained by the lateral direction, which will reduce the deformation resistance, the intermediate misalignment member 33 is sandwiched between the upper and lower misalignment members 32 and maintains a natural compression state. When the upper and lower misalignment members 32 move vertically with the shell, the intermediate misalignment member 33 and the meshing surface of the gear 34 of the two move relative to each other. During the misalignment process, the frictional damping generated by the contact surface of the gear 34 will consume the vertical deformation energy, significantly reduce the vertical displacement amplitude of the GIL pipeline 8, and avoid damage to the pipeline due to vertical pulling or squeezing.

[0028] The above embodiments are merely illustrative of several implementations of the present invention, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A multi-stable flexible support device suitable for large deformation resistance of tunnel GIL pipelines, characterized in that: include Horizontal support unit, used to accommodate horizontal displacement of GIL pipeline; A vertical support unit, connected to the horizontal support unit, is used to accommodate the vertical displacement of the GIL pipeline. The connecting unit has one end connected to the horizontal support unit and the other end used for detachable connection to the GIL pipeline.

2. The multi-stable flexible support device for tunnel GIL pipelines resistant to large deformation as described in claim 1, characterized in that: Both the horizontal support unit and the vertical support unit are equipped with support devices. The support devices have the same structure and are installed horizontally on the horizontal support unit and vertically on the vertical support unit, respectively.

3. A multi-stable flexible support device for tunnel GIL pipelines resistant to large deformations according to claim 2, characterized in that: The support device includes an upper misaligned component, a lower misaligned component, and a middle misaligned component. The upper and lower misaligned components are provided with an interlocking structure. The upper and lower sides of the middle misaligned component are provided with a fitting structure adapted to the interlocking structure. The middle misaligned component is sandwiched between the upper and lower misaligned components, and a relatively misalignable interlocking connection is achieved through the interlocking structure and the fitting structure.

4. A multi-stable flexible support device for tunnel GIL pipelines resistant to large deformations according to claim 3, characterized in that: Both the meshing structure and the mating structure are gear structures, and the top of the gear is a smooth curved surface.

5. A multi-stable flexible support device for tunnel GIL pipelines resistant to large deformations according to claim 3, characterized in that: The support device is also provided with a limiting baffle, which is installed on the outside of the upper misaligned member and the lower misaligned member to restrict the middle misaligned member from disengaging. The limiting baffle is provided with a baffle fixing hole for fixing the limiting baffle.

6. A multi-stable flexible support device for tunnel GIL pipelines resistant to large deformations according to claim 3, characterized in that: The intermediate misaligned component has a planar segment perpendicular to the cross-section of the mating structure, and the connecting unit is fixedly installed at the planar segment.

7. A multi-stable flexible support device for tunnel GIL pipelines resistant to large deformations according to claim 3, characterized in that: The horizontal support unit and the vertical support unit are respectively provided with a horizontal support shell and a vertical support shell. The horizontal support shell and the vertical support shell are fixedly connected by an L-shaped metal sheet. The vertical support shell is provided with bolt holes and is fixedly connected to the tunnel wall through the bolt holes. The upper sliding member and the lower sliding member are both provided with member fixing holes and are fixedly connected to the horizontal support shell and the vertical support shell through the member fixing holes.

8. A multi-stable flexible support device for tunnel GIL pipelines resistant to large deformations according to claim 7, characterized in that: The horizontal support shell and the vertical support shell are hollow structures with cross-sectional shapes of U-shape, arc shape or combined curved surface, and the top surfaces of the horizontal support shell and the vertical support shell are provided with notches.

9. A multi-stable flexible support device for tunnel GIL pipelines resistant to large deformations according to claim 1, characterized in that: The connecting unit includes a fitting part adapted to the shape of the GIL pipeline and a fixing part connected to the intermediate misalignment member. The fitting part is a ring-shaped, semi-ring-shaped or arc-shaped structure, and the fixing part is provided with assembly holes.

10. A multi-stable flexible support device for tunnel GIL pipelines resistant to large deformations according to claim 3, characterized in that: At least two sets of the upper-layer misaligned components and the lower-layer misaligned components are provided in parallel.

Images