Vertical transportation device for construction of main transformer cave structure of hydropower station and construction method of vertical transportation device
By installing pre-embedded anchor bolts, connecting plates, and electric hoists in the main transformer tunnel of the hydropower station, the problem of material transportation difficulties during the construction of the main transformer tunnel was solved, construction efficiency and safety were improved, and the power generation target of the hydropower station was ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-04
- Publication Date
- 2026-04-07
AI Technical Summary
At present, the lack of effective hoisting and transportation equipment in the construction of the main transformer tunnel of the hydropower station has led to difficulties in material transportation. Especially in the case of multiple layers, large area and long working face, it is impossible to meet the construction needs and affect the construction progress and the achievement of power generation target.
A vertical transport device consisting of pre-embedded anchor bolt assemblies, connecting plate assemblies, rails, and electric hoists is used. The pre-embedded anchor bolts are fixed in the surrounding rock of the top arch, the connecting plates are welded to the rails, and the electric hoists enable vertical transport. The limit plates ensure safety and stability.
It achieves efficient vertical transportation of materials inside the main transformer tunnel, reduces waste of manpower and resources, improves construction efficiency, shortens the construction cycle, ensures the achievement of power generation node targets, and is low-cost and safe and reliable.
Smart Images
Figure CN121800071A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water conservancy and hydropower engineering technology, and more specifically to the field of vertical transportation device and construction method for the construction of the main transformer tunnel structure of a hydropower station. Background Technology
[0002] The underground powerhouse of a hydropower station is usually divided into two parts from the inside out: the main transformer tunnel auxiliary powerhouse and the main transformer section of the generating unit. The main transformer tunnel auxiliary powerhouse mainly houses high / low voltage switchgear, SFC main equipment and control cabinet, transformer, distribution panel cabinet, etc.; the main transformer section of the generating unit mainly houses the main transformer, busbar, underground GIS equipment, reactor, etc., and plays the role of the power conversion hub of the entire power station.
[0003] The structures inside the main transformer tunnel are quite complex, with a long, narrow layout. Their structures consist entirely of concrete slabs, beams, walls, and columns. The structural concrete work, architectural finishing, and installation and commissioning of electromechanical equipment must be completed before the system is energized, resulting in a significant workload. Currently, the main transformer tunnels of various hydropower stations lack efficient hoisting and transport methods like the bridge cranes used in the main powerhouse. There is only one construction passage for the main transformer intake tunnel. Reinforcing steel, formwork, scaffolding, and concrete are hoisted and transported through this passage using truck cranes and manual labor. Clearly, this inefficient vertical transport method cannot meet current construction needs, especially given the numerous layers, large area, long working surface, and difficulties in simultaneous internal and external, vertical and horizontal material transport within the main transformer tunnel.
[0004] Therefore, there is an urgent need to develop an effective hoisting and transportation device for the construction of the main transformer tunnel, so as to accelerate the construction progress of the main transformer tunnel and ensure the achievement of the hydropower station's commissioning and power generation target. Summary of the Invention
[0005] The purpose of this invention is to solve the above-mentioned technical problems by providing a vertical transportation device and its construction method for the construction of the main transformer tunnel structure of a hydropower station.
[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution: The first aspect of the present invention provides a vertical transportation device for the construction of the main transformer tunnel structure of a hydropower station, including a pre-embedded anchor bolt assembly, a connecting plate assembly, a track, and an electric hoist. The pre-embedded anchor bolt assembly includes two rows of pre-embedded anchor bolts, which are evenly arranged at the center of the top arch of the main transformer tunnel and the main transformer ventilation tunnel. Two-thirds of the length of each pre-embedded anchor bolt is inserted into the surrounding rock of the top arch, and one-third of the length of each pre-embedded anchor bolt is exposed. The connecting plate assembly consists of multiple connecting plates. The exposed parts of each pre-embedded anchor rod are welded to the corresponding connecting plate. The bottom surface of all connecting plates is welded to the plane on the track, and an electric hoist is installed on the track.
[0007] In one embodiment, the system also includes a limiting plate assembly comprising two limiting plates located at both ends of the track, the two limiting plates preventing the electric hoist from sliding off the track.
[0008] In one embodiment, both rows of pre-embedded anchor rods are composed of multiple pre-embedded anchor rods arranged horizontally in a uniform manner.
[0009] In one implementation, each embedded anchor rod is made of threaded steel bar with a diameter of 30mm.
[0010] In one implementation, each connecting plate is welded to two corresponding pre-embedded anchor rods in two rows, and the bottom surface of the connecting plate is welded to the upper plane of the track using double-sided welding.
[0011] In one embodiment, both the connecting plate and the limiting plate are made of steel plate.
[0012] In one embodiment, the track is made of I-beams, with grounding points at both ends, and the grounding resistance of each grounding point is less than 4Ω.
[0013] In one embodiment, the electric hoist is equipped with a pulley at the top that cooperates with the track, and a hook at the bottom of the electric hoist to achieve vertical lifting and lowering.
[0014] Specifically, electric hoists are existing technology. Operators use remote controls to move the pulleys of the electric hoist horizontally back and forth within the track, and to raise and lower the hook of the electric hoist vertically.
[0015] A second aspect of the present invention provides a construction method for a vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station. The method, employing the aforementioned vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station, includes the following steps: S1. Construction of pre-embedded anchor bolts; S2, Track installation; S3. Electric hoist installation and load test; S4. Hoisting and vertical transportation construction.
[0016] In one implementation, the key points of step S1 are as follows: S11. After the first layer of the main transformer tunnel is excavated, use a total station to measure and mark the control points of the pre-embedded anchor rods according to the orientation of the drawings from the entrance of the main transformer tunnel to the center of the arch of the extension section of the main transformer ventilation tunnel. S12. Use a drilling rig to drill two rows of pre-embedded anchor bolt holes. The diameter of the drilling rig bit should be more than 15mm larger than the diameter of the pre-embedded anchor bolt. Use high-pressure air (or high-pressure water) to blow away the water and rock powder in the pre-embedded anchor bolt holes. S13. Use an anchor bolt grouting machine to grout the pre-embedded anchor bolt holes on the drilling rig lifting platform, and the grouting density shall not be less than 80%. S14. Use 30mm diameter threaded steel bars to make pre-embedded anchor rods. After grouting, insert the pre-embedded anchor rods into the pre-embedded anchor rod holes. The length inserted into the hole shall not be less than 95% of the design length. S15. The mortar density and length of the pre-embedded anchor rod 5 are tested using the acoustic reflection method without damage, and a tensile test is performed to verify the load-bearing capacity.
[0017] In one implementation, the key points of step S2 are as follows: S21. After the second or third layer of the main tunnel is excavated, a connecting plate is welded on each of the two pre-embedded anchor rods in each longitudinal direction. The pre-embedded anchor rods and the connecting plate are welded together using a double-sided welding method. S22. Install the rail at the bottom of the connecting plate, adjust the rail span, elevation difference along the entire length, and joint error to meet the design requirements, and weld the upper plane of the rail to the bottom surface of the connecting plate using a double-sided welding method, with a weld corner of not less than 8mm. S23. Install and weld a limiting plate at one end of the track near the main transformer intake tunnel; S24. A grounding point is set at each end of the track and connected to the ground wire. The grounding resistance should be less than 4Ω.
[0018] In one implementation, the key points of step S3 are as follows: S31. After the main transformer tunnel is fully excavated, scaffolding is erected at the main transformer ventilation tunnel entrance, and electric hoists are installed on the track. S32. Install and weld the limiting plate on the side rail of the main transformer exhaust tunnel; S33. After inspecting the mechanical and electrical parts of the electric hoist, no-load, static load, and dynamic load test runs were conducted and the hoist met the design requirements.
[0019] The beneficial effects of this invention are as follows: 1. It solves the problem of difficult transportation and hoisting of concrete, steel bars, formwork, scaffolding, etc., reduces the use of truck cranes and manual secondary transportation, and ensures that the construction of the main tunnel line changes from a flow-type operation to a synchronous step-by-step operation, avoids waste of manpower and material resources, and improves the guarantee rate of each construction node.
[0020] 2. An additional hoisting and transfer channel has been added to the main transformer exhaust duct, which can meet the hoisting and transfer needs of materials from both sides of the main transformer duct (i.e., the main transformer intake duct and the main transformer exhaust duct), providing a favorable channel for the construction of the main transformer duct to the greatest extent and greatly improving the construction efficiency of the main transformer duct.
[0021] 3. It can effectively shorten the construction cycle of the main transformer tunnel and ensure the achievement of the hydropower station's power transmission and commissioning goals.
[0022] 4. Low cost, low risk, and low resource input can reduce construction difficulty and increase labor productivity.
[0023] 5. It has a simple and reliable structure, is easy to install and use, and is safe and reliable, making it highly valuable for promotion. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the present invention.
[0026] Figure 2 yes Figure 1 A schematic diagram of its longitudinal section.
[0027] Figure 3 yes Figure 1 A detailed schematic diagram of a part of the diagram.
[0028] Attached diagram labels: 1-Main transformer tunnel; 2-Main transformer exhaust tunnel; 3-Main transformer intake tunnel; 4-Top arch; 5-Embedded anchor bolt; 6-Connecting plate; 7-Railway; 8-Limiting plate; 9-Electric hoist; 10-Hook; 11-Pulley. Detailed Implementation
[0029] To make the technical problems, technical solutions, and technical effects of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0031] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0032] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.
[0033] Example 1 like Figures 1 to 3 As shown, this embodiment provides a vertical transportation device for the construction of the main transformer tunnel structure of a hydropower station, including a pre-embedded anchor bolt assembly, a connecting plate assembly, a track 7, and an electric hoist 9; The pre-embedded anchor bolt assembly includes two rows of pre-embedded anchor bolts 5. The two rows of pre-embedded anchor bolts 5 are evenly arranged at the center of the top arch 4 of the main transformer tunnel 1 and the main transformer ventilation tunnel 2. Two-thirds of the length of each pre-embedded anchor bolt 5 is inserted into the surrounding rock of the top arch 4, and one-third of the length of each pre-embedded anchor bolt 5 is the exposed part. The connecting plate assembly includes multiple connecting plates 6. The exposed parts of each pre-embedded anchor rod 5 are welded to the corresponding connecting plate 6. The bottom surface of all connecting plates 6 is welded to the upper plane of the track 7. An electric hoist 9 is installed on the track 7.
[0034] It also includes a limit plate assembly, which includes two limit plates 8 located at both ends of the track 7, and the two limit plates 8 restrict the electric hoist 9 from sliding out of the track 7.
[0035] Both rows of pre-embedded anchor rods 5 are composed of multiple pre-embedded anchor rods 5 arranged horizontally in even rows.
[0036] All pre-embedded anchor rods 5 are made of threaded steel bars with a diameter of 30mm.
[0037] Each connecting plate 6 is welded to two corresponding pre-embedded anchor rods 5 in two rows, and the bottom surface of the connecting plate 6 is welded to the upper plane of the track 7 by double-sided welding.
[0038] Both the connecting plate 6 and the limiting plate 8 are made of steel plate.
[0039] Track 7 is made of I-beams and has grounding points at both ends. The grounding resistance of each grounding point is less than 4Ω.
[0040] The electric hoist 9 is equipped with a pulley 11 at the top that cooperates with the track 7, and a hook 10 at the bottom of the electric hoist 9 to achieve vertical lifting and lowering.
[0041] Specifically, the electric hoist 9 is existing technology. The operator uses a remote control to operate the pulley 11 of the electric hoist 9 to move horizontally back and forth within the track 7, and to operate the hook 10 of the electric hoist 9 to move vertically up and down.
[0042] Example 2 This embodiment provides a construction method for a vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station. The method employs a vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station as disclosed in Embodiment 1, and includes the following steps: S1. Construction of pre-embedded anchor bolts 5, details are as follows: S11. After the first layer of the main transformer tunnel 1 is excavated, the control points of the pre-embedded anchor rods 5 are measured and marked according to the orientation of the drawings at the center of the arch 4 of the extension section from the entrance of the main transformer tunnel 1 to the main transformer exhaust tunnel 2. S12. Use a drilling rig to drill two rows of pre-embedded anchor bolt holes. The diameter of the drilling rig bit is more than 15mm larger than the diameter of the pre-embedded anchor bolt 5. Use high-pressure air to blow away the water and rock powder in the pre-embedded anchor bolt holes. S13. Use an anchor grouting machine to grout the 5 holes of the pre-embedded anchor bolts on the drilling rig lifting platform, and the grouting density shall not be less than 80%. S14. Use 30mm diameter threaded steel bars to make pre-embedded anchor rods 5. After grouting, insert the pre-embedded anchor rods 5 into the pre-embedded anchor rod holes. The length inserted into the holes shall not be less than 95% of the design length. S15. The mortar density and length of the pre-embedded anchor rod 5 are tested using the acoustic reflection method without damage, and a tensile test is performed to verify the load-bearing capacity. S2 and track 7 installation details are as follows: S21. After the second or third layer of the main tunnel 1 is excavated, a connecting plate 6 is welded on each of the two pre-embedded anchor rods 5 in each longitudinal direction. The pre-embedded anchor rods 5 and the connecting plate 6 are welded together by double-sided welding. S22. Install the rail 7 at the bottom of the connecting plate 6, adjust the span, elevation difference and joint error of the rail 7 to meet the design requirements, weld the upper plane of the rail 7 to the bottom surface of the connecting plate 6, using double-sided welding, with a weld angle of not less than 8mm. S23. Install and weld a limiting plate 8 at one end of the track 7 near the main transformer air intake tunnel 3; S24. Each end of track 7 is grounded at one point and connected to the ground wire. The grounding resistance should be less than 4Ω. The installation and load test of S3 and electric hoist 9 are detailed below: S31. After the main transformer tunnel 1 is fully excavated, scaffolding is erected at the entrance of the main transformer ventilation tunnel 2, and the electric hoist 9 is installed on the track 7. S32. Install and weld the limiting plate 8 on the side rail 7 of the main transformer exhaust tunnel 2; After inspecting the mechanical and electrical components of S33 and electric hoist 9, no-load, static load, and dynamic load test runs were conducted and they met the design requirements. S4. Hoisting and vertical transportation construction.
Claims
1. A vertical transportation device for the construction of the main transformer tunnel structure of a hydropower station, characterized in that, Includes pre-embedded anchor bolt assembly, connecting plate assembly, rail (7) and electric hoist (9); The pre-embedded anchor bolt assembly includes two rows of pre-embedded anchor bolts (5). The two rows of pre-embedded anchor bolts (5) are evenly arranged at the center of the top arch (4) of the main transformer tunnel (1) and the main transformer ventilation tunnel (2). Two-thirds of the length of each pre-embedded anchor bolt (5) is inserted into the surrounding rock of the top arch (4), and one-third of the length of each pre-embedded anchor bolt (5) is the exposed part. The connecting plate assembly includes multiple connecting plates (6), and the exposed parts of each of the pre-embedded anchor rods (5) are welded to the corresponding connecting plate (6). The bottom surfaces of all the connecting plates (6) are welded to the upper plane of the track (7), and the electric hoist (9) is installed on the track (7).
2. The vertical transportation device for the construction of the main transformer tunnel structure of a hydropower station according to claim 1, characterized in that, It also includes a limiting plate assembly, which includes two limiting plates (8) located at both ends of the track (7), the two limiting plates (8) restricting the electric hoist (9) from sliding out of the track (7).
3. The vertical transportation device for the construction of the main transformer tunnel structure of a hydropower station according to claim 1, characterized in that, Both rows of pre-embedded anchor rods (5) are composed of multiple pre-embedded anchor rods (5) arranged horizontally in a uniform manner.
4. A vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station according to claim 3, characterized in that, All the pre-embedded anchor rods (5) are made of threaded steel bars with a diameter of 30mm.
5. A vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station according to claim 2, characterized in that, Each of the connecting plates (6) is welded to the two pre-embedded anchor rods (5) in the two rows, and the bottom surface of the connecting plate (6) is welded to the upper plane of the track (7) by double-sided welding.
6. A vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station according to claim 5, characterized in that, Both the connecting plate (6) and the limiting plate (8) are made of steel plates.
7. A construction method for a vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station, comprising the vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1, Construction of pre-embedded anchor rods (5); S2, Track (7) installation; S3, Electric hoist (9) installation and load test; S4. Hoisting and vertical transportation construction.
8. The construction method of a vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station according to claim 7, the key points of step S1 are as follows: S11. After the first layer of the main transformer tunnel (1) is excavated, the control points of the pre-embedded anchor rods (5) are measured and marked according to the orientation of the drawings at the center of the arch (4) of the extension section from the entrance of the main transformer tunnel (1) to the main transformer exhaust tunnel (2). S12. Use a drilling rig to drill two rows of pre-embedded anchor bolt holes. The diameter of the drilling rig bit is more than 15mm larger than the diameter of the pre-embedded anchor bolt (5). Use high-pressure air to blow away the water and rock powder in the pre-embedded anchor bolt holes. S13. Use an anchor grouting machine to grout the pre-embedded anchor bolts (5) holes on the drilling rig lifting platform, and the grouting density shall not be less than 80%; S14. Use 30mm diameter threaded steel bars to make pre-embedded anchor rods (5). After grouting, insert the pre-embedded anchor rods (5) into the pre-embedded anchor rod holes. The length inserted into the holes shall not be less than 95% of the design length. S15. The mortar density and length of the pre-embedded anchor rod 5 are tested using the acoustic reflection method without damage, and a tensile test is performed to verify the load-bearing capacity.
9. The construction method of a vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station according to claim 7, the key points of step S2 are as follows: S21. After the second or third layer of the main tunnel (1) is excavated, a connecting plate (6) is welded on each of the two pre-embedded anchor rods (5) in each longitudinal direction. The pre-embedded anchor rods (5) and the connecting plate (6) are welded together by double-sided welding. S22. Install the rail (7) at the bottom of the connecting plate (6), adjust the span, height difference and joint error of the rail (7) to meet the design requirements, weld the upper plane of the rail (7) to the bottom surface of the connecting plate (6) using double-sided welding, and the weld angle is not less than 8mm. S23. Install and weld a limiting plate (8) at one end of the track (7) near the main transformer intake tunnel (3). S24. Each end of the track (7) is grounded at a point and connected to the ground wire. The grounding resistance should be less than 4Ω.
10. The construction method of a vertical transportation device for the construction of a main transformer tunnel structure in a hydropower station according to claim 7, the key points of step S3 are as follows: S31. After the main transformer tunnel (1) is fully excavated, scaffolding is erected at the entrance of the main transformer ventilation tunnel (2) and the electric hoist (9) is installed on the track (7). S32. Install and weld the limiting plate (8) on the side rail (7) of the main transformer exhaust duct (2); S33. After inspecting the mechanical and electrical parts of the electric hoist (9), perform no-load, static load, and dynamic load test runs to meet the design requirements.