Foldable shed tunnel type spanning frame for power transmission line spanning construction and mounting method of foldable shed tunnel type spanning frame

Abstract

The invention belongs to the field of spanning construction of spreading wires in power transmission lines, and provides a foldable shed tunnel type spanning frame for spanning construction of power transmission lines and an installation method, and the spanning frame comprises a plurality of foldable spanning frame bodies, a supporting cross beam, and a spanning frame telescoping driving mechanism. The spanning frame telescopic driving mechanism is installed on the supporting cross beam, a plurality of foldable spanning frame bodies are symmetrically installed on the two sides of the supporting cross beam respectively, and each foldable spanning frame body achieves telescopic movement in the opposite directions on the two sides of the supporting cross beam through the spanning frame telescopic driving mechanism. The spanning frame designed by the invention can realize convenient transportation on a highway through a truck in a contraction state, can be gradually unfolded to an arch shape in a position to be spanned, is small in occupied area, does not need to occupy a passage road, and can realize effective protection on running vehicles.

Description

Technical Field

[0001] The invention belongs to the field of conductor laying across construction in power transmission lines, and in particular relates to a foldable shed-type spanning frame for power transmission line spanning construction and an installation method thereof. Background Art

[0002] During the construction of power grids, transmission lines inevitably have to cross highways. For transmission lines crossing highways, the existing crossing frame structure and construction methods have problems such as complex structure, inconvenient transportation, high construction intensity and low operating efficiency. Workers need to build scaffolding or drive large vehicles to occupy the driving lane to achieve crossing protection for the target lane of the highway, which causes many inconveniences to the normal passage of adjacent lanes. In addition, the existing crossing frames for highways are often based on heavy trucks as the chassis, and the large beams are telescopic and turned by heavy-duty cranes, which has a high production cost. There are strict restrictions on the width and height of the crossing frames on highways, so innovative designs for the crossing frames are needed.

[0003] The existing folding and unfolding technology has been developed to maturity and has been widely used in space satellite solar panels, elevators, lightweight bridges and telescopic access control, etc., but few studies have applied it to the field of spanning frames. The spanning frame must withstand the dynamic impact force generated by the fall of the wires above it, so the spanning frame must have good impact resistance. The advantage of the folding and unfolding mechanism is that it can be folded, but the bearing capacity is generally not high. The arch structure has been proven to have good bearing capacity because its upper surface is in the shape of a myopic arc, so it can be used to improve the impact resistance of the spanning frame. However, the existing arch mechanism is mainly composed of a frame and legs assembled together, which is difficult to make into an integrated unit, and the volume is relatively large, which causes many inconveniences during transportation and assembly and disassembly. Summary of the invention

[0004] The purpose of the present invention is to provide a foldable shed-type crossing frame and an installation method for power transmission line crossing construction, so as to solve the problems of low integration, complex structure, large volume and unchanged assembly and disassembly in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides a foldable shed-type crossing frame for power transmission line crossing construction, comprising a plurality of foldable crossing frame bodies, a supporting beam and a telescopic drive mechanism for the crossing frame; the telescopic drive mechanism for the crossing frame is installed on the supporting beam, and a plurality of foldable crossing frame bodies are symmetrically installed on both sides of the supporting beam, and each foldable crossing frame body can realize telescopic movement in opposite directions on both sides of the supporting beam through the telescopic drive mechanism of the crossing frame.

[0006] Furthermore, the foldable spanning frame body is a parallelogram telescopic structure.

[0007] Furthermore, the telescopic driving mechanism of the crossing frame is an electric push rod, one end of the electric push rod is connected to the supporting beam, and the other end output end is connected to the foldable crossing frame body. The extension and retraction of the electric push rod drives the foldable crossing frame body to perform telescopic movement.

[0008] Furthermore, each foldable spanning frame body corresponds to an electric push rod.

[0009] Furthermore, adjacent foldable spanning frame bodies on the same side are connected together via a hinged cross bar.

[0010] Furthermore, a self-locking mechanism is provided at the end of the foldable spanning frame body, and the self-locking mechanism is used to lock the state of the foldable spanning frame body after extension.

[0011] Furthermore, flexible protective nets are arranged on all foldable spanning frame bodies and supporting beams.

[0012] Furthermore, the flexible protection net is arranged in the sealing net mechanism, the sealing net mechanism is respectively arranged on both sides of the supporting beam, and the flexible protection net is a Dyneema rope net.

[0013] Furthermore, a plurality of foldable spanning frames on both sides of the supporting beam form an arch-shaped structure after being extended.

[0014] In a second aspect, the present invention provides a method for installing a foldable shed-type spanning frame for power transmission line spanning construction, comprising the following steps: The foldable shed-type crossing frame shrinks to the smallest volume and is loaded on a transport vehicle and transported to the target crossing area on the highway; The transport vehicle stops in the middle of the highway, and the crane on the vehicle raises the span to the target height; The electric push rod at the position of the supporting crossbeam of the spanning frame is driven to unfold the spanning frame into an arch-shaped structure; The lifting mechanism is controlled to fall back, the span frame is landed at the target position, and the end legs of the span frame are structurally locked through the self-locking mechanism, and the transport vehicle drives away; Drive the sealing mechanism at the crossbeam position, by controlling the switch inside the crossbeam, the Dyneema rope net spreads out from the crossbeam position to both sides by gravity, completing the sealing on the surface of the spanning frame.

[0015] Compared with the prior art, the present invention has the following technical effects: The span frame of the present invention is compact in size when in a retracted state, and is convenient for long-distance transportation on highways by trucks. At the same time, the assembly, installation and disassembly processes are simplified, and the construction difficulty and cost are reduced.

[0016] The spanning frame can be gradually expanded from a retracted state to an arched shape. This feature allows it to occupy a small area on the construction site without occupying the road, thereby improving construction efficiency and reducing the impact on traffic.

[0017] The present invention adopts a spanning frame made of steel combined with the parallelogram deformation characteristics, has an arched structure, has a large structural rigidity, can effectively resist the effects of external forces (such as wind loads, conductor impacts, etc.), and ensures safety during the construction process.

[0018] An elastic net made of Dyneema rope is designed on the surface of the crossing frame. This material has the characteristics of high strength, wear resistance, corrosion resistance, etc. It can effectively bear and resist impact of fallen wires, further improving the safety performance of the crossing frame.

[0019] The frame and legs in the spanning frame are integrated into one design, which avoids the tedious process of on-site assembly and disassembly and improves construction efficiency.

[0020] During the entire construction process, workers do not need to perform complicated on-site operations on the crossing frame. They only need to control driving mechanisms such as electric push rods to complete operations such as unfolding, locking and sealing the crossing frame. The high degree of mechanization reduces labor intensity.

[0021] The span takes up less space in both the contracted and expanded states, reducing the occupation and damage to land resources. As the span adopts modular, lightweight and miniaturized design and has a strong and durable structure, it can be reused many times, reducing construction costs and conforming to the concept of sustainable development.

[0022] In summary, the foldable shed-type spanning frame described in this technical solution performs well in terms of convenience, safety, construction efficiency, environmental protection and comprehensive benefits, and has a high technical level and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the foldable artificial shed-type spanning frame of the present invention.

[0024] Figure 2 This is a schematic diagram of the foldable artificial shed-type crossing frame of the present invention being opened to traffic after installation.

[0025] Figure 3 It is a schematic diagram of the foldable spanning frame of the present invention in a retracted state.

[0026] Figure 4 It is a schematic diagram of the foldable spanning frame of the present invention in the unfolded state.

[0027] Figure 5 ①-⑥ are schematic diagrams of the unfolding process of the foldable shed-type spanning frame of the present invention.

[0028] in: 1. Highway driving lane; 2. Foldable span frame body; 3. Dyneema rope net; 4. Conductor; 5. Support beam; 6. Electric push rod; 7. Self-locking structure; 8. Articulated cross bar. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0030] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Glossary: The parallelogram telescopic structure is a telescopic mechanism designed based on the parallelogram principle and is widely used in various engineering fields.

[0033] When one side of a parallelogram is fixed and the other side moves in a parallel direction, the shape of the entire parallelogram will change, thus realizing the telescopic function.

[0034] The parallelogram telescopic structure has the characteristics of simple structure, easy implementation, and large telescopic range. It can achieve telescopic effect by changing the length or angle of the parallelogram without changing the overall structure, so it is very suitable for scenes that require flexible adjustment of space or size.

[0035] How it works The working principle of the parallelogram telescopic structure is mainly based on the geometric characteristics of the parallelogram. When one side of the parallelogram is fixed and the other side moves in a parallel direction, the shape of the entire parallelogram will change, but the two sets of opposite sides will always remain parallel and equal. This change can be achieved through mechanical structures (such as hinges, slides, etc.), or it can be controlled by electric, hydraulic and other drive methods.

[0036] Example 1, please refer to Figure 1 The present invention discloses a foldable shed-type crossing frame for power transmission line crossing construction, comprising a plurality of foldable crossing frame bodies 2, a supporting crossbeam 5 and a telescopic driving mechanism for the crossing frame; the telescopic driving mechanism for the crossing frame is installed on the supporting crossbeam 5, and a plurality of foldable crossing frame bodies 2 are symmetrically installed on both sides of the supporting crossbeam 5, and each foldable crossing frame body 2 realizes telescopic movement in opposite directions on both sides of the supporting crossbeam 5 through the telescopic driving mechanism of the crossing frame.

[0037] By adopting the foldable spanning frame body 2, the spanning frame can be flexibly expanded or contracted according to construction needs. This design is not only convenient for transportation and storage, but also can be quickly erected at the construction site, greatly improving construction efficiency.

[0038] The foldable span frame body 2 is symmetrically installed on both sides of the supporting beam 5. This symmetrical layout not only ensures the stability and balance of the span frame, but also enables the span frame to form a uniform arch-shaped structure when unfolded, thereby improving the bearing capacity and wind resistance of the span frame.

[0039] The mechanism is installed on the supporting beam 5, and can accurately control the telescopic movement of each foldable spanning frame body 2, thereby realizing the automated and mechanized construction of the spanning frame. This driving method not only improves the construction accuracy, but also reduces the manpower input and reduces the construction cost.

[0040] Each foldable spanning frame body 2 can perform telescopic movement in opposite directions on both sides of the supporting beam 5. This design enables the spanning frame to be flexibly adjusted according to different construction environments and span widths, thereby enhancing the adaptability and versatility of the spanning frame.

[0041] Because the crossing frame adopts a foldable design and symmetrical layout, as well as an efficient driving mechanism, it can maintain stability and balance during the construction process, effectively avoiding safety accidents caused by structural instability.

[0042] Example 2, please refer to Figures 1 to 4 The present invention discloses a foldable shed-type spanning frame for power transmission line spanning construction, which specifically includes: The core components of the spanning frame include several foldable spanning frame bodies 2, supporting beams 5 and spanning frame telescopic drive mechanisms. These key elements together constitute a flexible and stable construction auxiliary equipment. It is particularly worth mentioning that each foldable spanning frame body 2 adopts a parallelogram telescopic structure. This unique design not only gives the spanning frame extremely high flexibility and stability, but also enables it to easily cope with various complex construction environments and different span width requirements. When construction requires, the spanning frame can be quickly expanded or retracted by simply operating the spanning frame telescopic drive mechanism (such as the electric push rod 6), thereby greatly improving construction efficiency and shortening construction period.

[0043] In order to ensure the precise control and synchronization of the telescopic movement, each foldable spanning frame body 2 is equipped with a corresponding electric push rod 6. This one-to-one design enables the spanning frame to maintain a high degree of coordination and consistency during the expansion or contraction process. In addition, the adjacent foldable spanning frame bodies 2 on the same side are closely connected by a hinged cross bar 8. This design further enhances the overall rigidity and stability of the spanning frame, ensuring its safety and reliability during the construction process.

[0044] In order to improve the safety performance of the crossing frame, the present invention also deliberately sets a self-locking mechanism 7 at the end of the foldable crossing frame body 2. This mechanism can quickly lock its state after the crossing frame is extended, effectively preventing accidental movement or tilting caused by external force. This design not only improves the safety and reliability of the crossing frame, but also makes it more convenient and efficient in daily operation and maintenance.

[0045] Flexible protective nets are carefully set on all the foldable spanning frame bodies 2 and the supporting beams 5 to fully protect the safety of the construction site. These protective nets are hidden in the sealing mechanism and are installed on both sides of the supporting beams 5. The specially selected high-strength, wear-resistant Dyneema rope net 3 as the main material of the flexible protective net has greatly improved the protection ability of the spanning frame. After the foldable spanning frame bodies 2 on both sides of the supporting beams 5 are stretched, they will form a solid arch-shaped structure. This structure can not only effectively disperse and withstand the huge pressure from above, but also greatly improve the bearing capacity and wind resistance of the spanning frame, providing a safer and more reliable guarantee for the transmission line spanning construction.

[0046] In summary, the foldable shed-type spanning frame disclosed in the present invention performs well in terms of structural design, detail considerations, safety protection, etc. It not only improves construction efficiency, but also ensures safety and reliability during the construction process, bringing an important technical innovation and breakthrough to the field of transmission line spanning construction.

[0047] Specifically reflected in: The foldable spanning frame body 2 forms an arch structure after being unfolded, and the legs of the spanning frame are respectively located on the emergency lanes and isolation belts on both sides of the expressway 1.

[0048] The foldable spanning frame body 2 is driven by an electric push rod 6 that can perform linear telescopic motion. When the electric push rod 6 performs linear extension motion, the spanning frame 2 performs expansion motion; when the electric push rod 6 performs linear contraction motion, the foldable spanning frame body 2 performs contraction motion.

[0049] After the foldable spanning frame body 2 is unfolded, in order to strengthen the leg support rigidity, a self-locking mechanism 7 is designed at the legs to lock the legs, thereby improving the spanning frame's ability to withstand dynamic impacts on the conductors 4.

[0050] A Dyneema rope net 3 is laid above the spanning frame to reduce the dynamic impact of the conductor 4 on the foldable spanning frame body 2.

[0051] Example 3, please refer to Figure 5 The installation method of the foldable shed-type spanning frame for the transmission line spanning construction comprises the following steps: The foldable shed-type crossing frame shrinks to the smallest volume and is loaded on a transport vehicle and transported to the target crossing area on the highway; The transport vehicle stops in the middle of the highway, and the crane on the vehicle raises the span to the target height; The electric push rod at the position of the supporting crossbeam of the spanning frame is driven to unfold the spanning frame into an arch-shaped structure; The lifting mechanism is controlled to fall back, the span frame is landed at the target position, and the end legs of the span frame are structurally locked through the self-locking mechanism, and the transport vehicle drives away; Drive the sealing mechanism at the crossbeam position, by controlling the switch inside the crossbeam, the Dyneema rope net spreads out from the crossbeam position to both sides by gravity, completing the sealing on the surface of the spanning frame.

[0052] This embodiment can realize rapid transportation on the highway by shrinking the foldable shed-type spanning frame to the minimum volume and loading it on the transport vehicle. This design greatly reduces the space occupied during transportation, improves transportation efficiency, and also reduces transportation costs.

[0053] After reaching the target crossing area, the transport vehicle can stop directly in the middle of the highway and use the crane on the vehicle to lift the crossing frame to the target height. This step simplifies the on-site installation process, reduces the need for additional lifting equipment, and further improves installation efficiency.

[0054] This embodiment can accurately control the deployment process of the spanning frame by driving the electric push rod at the position of the spanning frame support beam, so that it forms a stable arch-shaped structure. This design ensures the stability and accuracy of the spanning frame during deployment and avoids safety problems caused by uneven deployment or misalignment.

[0055] After the span frame lands at the target location, the self-locking mechanism locks the end legs of the span frame to ensure the stability and safety of the span frame during construction. This locking mechanism effectively prevents the span frame from moving or tilting due to external forces, providing reliable support for subsequent construction.

[0056] This embodiment drives the net sealing mechanism at the crossbeam position and controls the switch inside the crossbeam, so that the Dyneema rope net can be spread from the crossbeam position to both sides by gravity, thereby completing the net sealing operation on the surface of the crossing frame. This net sealing method is not only simple and fast, but also can ensure the uniformity and tightness of the net sealing, thereby improving the safety protection capability of the crossing frame.

[0057] As a flexible protective net, Dyneema rope net has the characteristics of high strength, wear resistance, corrosion resistance, etc., which can effectively prevent objects from falling or personnel injuries that may occur during the construction process. At the same time, its good light transmittance and air permeability also ensure the ventilation and lighting needs of the construction site.

[0058] The entire installation process of this embodiment is efficient and convenient, which greatly shortens the construction period and improves the construction efficiency. By reducing the manpower and material input in the transportation, installation and disassembly process, the construction cost is reduced.

[0059] The precise deployment and locking mechanism as well as the effective net sealing operation ensure the safety during the construction process and reduce the risk of safety accidents.

[0060] In summary, the installation method of the foldable shed-type crossing frame described in Example 3 has technical effects such as high efficiency, convenience, precision, stability, safety, effectiveness and significant comprehensive benefits, and provides a high-quality solution for the construction of transmission line crossings.

[0061] The present invention proposes a large folding and unfolding ratio crossing frame design, and the crossing frame has two modes. In the retracted mode, the crossing frame can be retracted into the interior of a truck compartment to achieve rapid transportation on the highway. In the unfolded mode, the crossing frame can be quickly unfolded on the highway to achieve rapid crossing protection for a one-way double lane.

[0062] Compared with the existing spanning frame type, the foldable spanning frame proposed in the present invention adopts an integrated design of frame and legs, has a simple structure, and does not require assembly between the frame and the legs, which effectively reduces the degree of worker participation and has a high degree of mechanization.

[0063] The foldable spanning frame designed by the present invention has modular design characteristics. It does not need to temporarily use the traffic lane during construction. The leg structure of the foldable spanning frame has the characteristics of miniaturization and lightness, and occupies a small area. It can use the isolation belt and roadbed on both sides of the highway to achieve spanning. For the two-way four-lane spanning working condition, two foldable spanning modules can be arranged to meet the spanning construction.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foldable shed-type spanning frame for power transmission line spanning construction, characterized in that: The invention comprises a plurality of foldable spanning frame bodies (2), a supporting crossbeam (5) and a spanning frame telescopic driving mechanism; the spanning frame telescopic driving mechanism is mounted on the supporting crossbeam (5), and a plurality of foldable spanning frame bodies (2) are symmetrically mounted on both sides of the supporting crossbeam (5), and each foldable spanning frame body (2) realizes telescopic movement in opposite directions on both sides of the supporting crossbeam (5) through the spanning frame telescopic driving mechanism.

2. The foldable shed-type spanning frame for power transmission line spanning construction according to claim 1 is characterized in that: The foldable spanning frame body (2) is a parallelogram telescopic structure.

3. The foldable shed-type spanning frame for power transmission line spanning construction according to claim 1 is characterized in that: The telescopic driving mechanism of the spanning frame is an electric push rod (6), one end of the electric push rod (6) is connected to the supporting cross beam (5), and the other end of the output end is connected to the foldable spanning frame body (2), and the telescopic movement of the electric push rod (6) drives the foldable spanning frame body (2) to perform telescopic movement.

4. The foldable shed-type spanning frame for power transmission line spanning construction according to claim 3 is characterized in that: Each foldable spanning frame body (2) corresponds to an electric push rod (6).

5. The foldable shed-type spanning frame for power transmission line spanning construction according to claim 1 is characterized in that: Adjacent foldable spanning frame bodies (2) on the same side are connected together via a hinged cross bar (8).

6. The foldable shed-type spanning frame for power transmission line spanning construction according to claim 1 is characterized in that: A self-locking mechanism (7) is provided at the end of the foldable spanning frame body (2), and the self-locking mechanism (7) is used to lock the state of the foldable spanning frame body (2) after being extended.

7. The foldable shed-type spanning frame for power transmission line spanning construction according to claim 1 is characterized in that: Flexible protective nets are arranged on all foldable spanning frame bodies (2) and supporting crossbeams (5).

8. The foldable shed-type spanning frame for power transmission line spanning construction according to claim 7 is characterized in that: The flexible protective net is arranged in the net sealing mechanism, and the net sealing mechanism is respectively arranged on both sides of the supporting crossbeam (5), and the flexible protective net is a Dyneema rope net (3).

9. The foldable shed-type spanning frame for power transmission line spanning construction according to claim 1 is characterized in that: A plurality of foldable spanning frame bodies (2) on both sides of the supporting crossbeam (5) form an arch-shaped structure after being stretched.

10. The method for installing a foldable shed-type crossing frame for power transmission line crossing construction according to any one of claims 1 to 9, characterized in that: The following steps are involved: The foldable shed-type crossing frame shrinks to the smallest volume and is loaded on a transport vehicle and transported to the target crossing area on the highway; The transport vehicle stops in the middle of the highway, and the crane on the vehicle raises the span to the target height; The electric push rod at the position of the supporting crossbeam of the spanning frame is driven to unfold the spanning frame into an arch-shaped structure; The lifting mechanism is controlled to fall back, the span frame is landed at the target position, and the end legs of the span frame are structurally locked through the self-locking mechanism, and the transport vehicle drives away; Drive the sealing mechanism at the crossbeam position, by controlling the switch inside the crossbeam, the Dyneema rope net spreads out from the crossbeam position to both sides by gravity, completing the sealing on the surface of the spanning frame.

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