A self-floating arresting system suitable for existing water conservancy and hydropower projects

Abstract

The present invention belongs to the technical field of water conservancy and hydropower, and discloses a self-floating type floating arresting system suitable for existing water conservancy and hydropower projects, which is arranged on the upstream water inflow side of an existing dam, and the facade of the existing dam is installed with a track for the self-floating device in front of the dam to move up and down with the water level, and the track is located between the power station spillway section and the unit water inlet dam section of the dam body, and is fixedly installed on the dam body through a plurality of supporting arms; the present invention fixes the web and the flange of the supporting arm by an anchoring device, so that both the supporting arm and the track are fixed, so that the pulley and the pulley pontoon can move up and down along the pulley main track and the pulley side guide track, and compared with the traditional device, the device does not need to open a movable guide groove in the dam body or take other measures to affect the dam body structure, so that the entire floating arresting facility composed of the floating boat connected by the pulley and the pulley pontoon and the floating arresting row body can freely rise and fall between the dead water level and the normal water level with the water level fluctuation, thereby effectively intercepting floating objects in the reservoir.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and specifically relates to a self-floating floating interception system suitable for existing water conservancy and hydropower engineering projects. Background Art

[0002] At present, trash racks are used to intercept floating objects before the water inlet of water conservancy and hydropower projects. However, when there are many floating objects, the trash racks at the water inlet of the unit will be blocked. In serious cases, the water level difference before and after the rack is as high as 4m or more, exceeding the safe water level difference of the trash rack, which seriously endangers the operation safety of the power station and poses a major safety hazard. Floating interception facilities are an important measure to intercept floating objects in the reservoir area of ​​hydropower stations. They can not only reduce the pressure of interception and cleaning of trash racks and trash cleaning machines, but also reduce the head loss of the power station and improve the power generation efficiency.

[0003] Article 3.1.7 of the "Specifications for Design of Water Inlets of Hydropower Stations" NB / T 10858-2021, revised in 2021, emphasizes that water inlets on rivers with a lot of pollutants should be equipped with sewage diversion, interception and cleaning facilities. It is explained in its clause explanation that sewage blocking the trash rack is a common problem in the operation of water inlets. The specification cites many examples of cases where there are many floating objects in the reservoir and no floating interception or diversion facilities are installed. Floating objects gather in front of the trash rack at the water inlet, causing the trash rack to be blocked, the pressure difference between the front and rear is too large, causing the rack body to deform, damage or fall off; or air is sucked into the water diversion tunnel, causing the pipeline to vibrate, the flow rate through the machine to reduce, and the unit output to decrease; even causing debris to get stuck in the turbine, breaking the guide vane, causing shutdown, damage or damage to the unit runner, etc., resulting in great economic losses.

[0004] There are many reasons for the blockage of water intakes and the collapse of trash racks in existing hydropower stations. The most important of these is the lack of research on the characteristics of the dirt carried by the river and the generalization of anti-pollution design. For example, in rivers with fierce rainstorms and mountain torrents and high density of branches and weeds, there are no effective sewage diversion and drainage facilities at the water intake, only ordinary trash racks. Especially for large hydropower station reservoirs, the flooding range is wide and the vegetation is relatively poor. In addition, there is a lot of production and living garbage from residents on both sides of the river. Various production and living garbage and other debris will enter the reservoir with the water flow, resulting in a large number of floating objects all year round, which not only affects the safe operation of the project and normal power generation, but also affects the ecological environment of the reservoir area.

[0005] For water conservancy and hydropower projects that were built and put into operation relatively early, the conditions were not met at the time, or the characteristics of floating objects carried by the river were not fully investigated, and the impact of floating objects in the reservoir area on the project was not fully considered. During the design and construction, floating interception facilities were not considered, which brought many problems to the subsequent operation. Therefore, for old power stations that have been in operation for a long time, it is urgent to add relevant facilities. However, there are no installation positions and hydraulic structure structures reserved on the dam body of the old power station, so it is urgent to find a solution for the built hydropower station. Summary of the invention

[0006] The purpose of the present invention is to provide a self-floating floating arresting system suitable for existing water conservancy and hydropower projects, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A self-floating type floating arresting system adapted to an existing water conservancy and hydropower project is arranged on the upstream water side of an existing dam 1, the floating arresting system mainly comprises a self-floating device 2 in front of the dam, a floating ship 3, a floating arresting row body 4 and an upstream end structure 5, the existing dam 1, the self-floating device 2 in front of the dam, the floating ship 3, the floating arresting row body 4 and the upstream end structure 5 are sequentially connected in sequence; the floating arresting system also comprises a track fixedly arranged in the vertical direction, the track is located between the power station spillway section 8 and the unit water inlet section 6 of the dam body of the existing dam 1, and is fixedly installed on the dam body through a plurality of arms 24;

[0009] The dam front self-floating device 2 is mainly composed of a pulley 32, a pulley pontoon 33 and a connecting device 35. The pulley 32 and the pulley pontoon 33 are connected by the connecting device 35. The upper part of the pulley pontoon 33 is U-shaped as a whole. The pulley 32 is located inside the U-shape and is connected to the pulley pontoon 33 through the connecting device 35 arranged at the bottom of the pulley 32. The pulley 32 is U-shaped as a whole. The inner side of the pulley 32 is provided with a wheel set for rolling on the track so that the pulley 32 and the The pulley buoy 33 is freely raised and lowered along the track as the water level rises and falls within the water level amplitude variation interval; a connecting lug 34 is fixedly provided on the outer side of the body of the pulley 32, and the connecting lug 34 is connected to the floating boat 3 through a shackle 13, a strong steel ring 14, and a shackle 2 15; the floating boat 3 is connected to the floating blocking row body 4, and the floating blocking row body 4 is connected to the upstream end structure 5. The floating blocking facility composed of the floating blocking row body 4, the floating boat 3, the pulley 32 and the pulley buoy 33 can be freely raised and lowered as the water level rises and falls within the water level amplitude variation interval;

[0010] The support arm 24 is fixed to the dam body by an anchoring device 16; longitudinal bars 26 are welded on the web and flange 25 of the support arm on the main channel side of the support arm 24, and transverse bars 27 are arranged between the upper and lower support arms 24, and the transverse bars 27 and the longitudinal bars 26 are welded around the overlapped parts;

[0011] The anchoring device 16 is mainly composed of an anchor plate 20, a chemical anchor bolt 18, a chemical anchor glue 19, a glue-filled spherical gasket 21 and fasteners; the arm 24, the longitudinal grid bar 26, the transverse grid bar 27 and the track are welded into a whole in the factory and then transported to the construction site for installation; the arm web and flange 25 are opened with a single-sided welding cut in the factory, and after being transported to the construction site, the arm web and flange 25 are welded to the anchor plate 20 of the anchoring device 16 by cut welding.

[0012] The installation process of the anchoring device 16 includes: when the reservoir water level drops to near the dead water level during the dry season at the construction site, a bolt hole is drilled in the dam body reinforced concrete 17 between the power station spillway section 8 and the unit water inlet dam section 6 according to the design position and depth requirements, and the chemical anchor 18 is implanted in the pre-drilled bolt hole. After the anchor plate 20 is in place, the glue-filled spherical gasket 21 and the fastener are installed; wherein the glue-filled spherical gasket 21 is provided with a glue-filling groove and a glue-filling hole, which are used to pressurize and inject the chemical anchor glue 19 into the cavity between the bolt hole and the chemical anchor 18, and after the chemical anchor glue 19 ages, the chemical anchor 18 can be effectively fixed in the dam body reinforced concrete 17; thereafter, the web and flange 25 of the support arm are welded to the anchor plate 20.

[0013] Preferably, the wheel set includes a main supporting wheel 30 and a side guide wheel 31, wherein a pair of the main supporting wheels 30 are arranged at the top and bottom, and one side guide wheel 31 is arranged at the top and bottom, and both of them cooperate with the track to run;

[0014] The track includes a pulley main track 28 and a pulley side guide track 29, the main supporting wheel 30 cooperates with the pulley main track 28 and can roll along the pulley main track 28; the side guide wheel 31 cooperates with the pulley side guide track 29 and can roll along the pulley side guide track 29, so that the pulley 32 can slide up and down along the track under different force conditions; wherein the contact part between the pulley main track 28 and the main supporting wheel 30 is welded with an austenitic stainless steel thin steel plate within the full stroke range.

[0015] Preferably, part of the body of the pulley 32 is manufactured using a water-sealed welding process to form a closed space in the partial body area; the pulley buoy 33 as a whole adopts a welded sealing structure to form a closed space therein, and the pulley buoy 33 and the pulley 32 are mainly welded with austenitic stainless steel; the wheel bearings of the main supporting wheel 30 and the side guide wheel 31 are both copper alloy inlaid self-lubricating bearings, and the wheel axle and the wheel body are both made of martensitic stainless steel.

[0016] Preferably, the fastener includes a flat washer 22 and a nut 23 .

[0017] Preferably, the volume of the pulley pontoon 33 is determined according to the buoyancy required by the design calculation; the buoyancy provided by the pulley pontoon 33 and the pulley 32 itself should enable the self-floating device 2 in front of the dam to overcome the sum of its own gravity and the friction resistance formed by the floating tension acting on the main track 28 of the pulley through the main supporting wheel 30 in the water, and maintain balance, so as to realize the free rise and fall of the self-floating device 2 in front of the dam with the rise and fall of the water level.

[0018] Preferably, the construction process also includes: after the chemical anchor bolts 18 are planted, a pull-out test is performed on the anchor bolts in proportion to the number required by the relevant regulations and specifications to detect the firmness of the planted reinforcement; the design and installation of the planted reinforcement is carried out in accordance with national standards.

[0019] Preferably, the main material of the rail and the anchor plate is low-alloy high-strength structural steel, and the anti-corrosion solution is zinc spraying + paint coating.

[0020] Preferably, the angle α between the support arm 24 and the dam axis is adjusted through design calculation according to the terrain of the reservoir shore and the layout of the unit water inlet, and its size is determined in combination with the specific position of the upstream end structure 5; the value of the spacing dimension L of the support arm 24 is determined according to the calculated value of the tension of the main cable of the floating arresting row; the upstream end structure 5 is set as a fixed anchor point as needed, or set as a self-floating anchor point similar to the structure of the self-floating device 2 in front of the dam, so as to meet the requirements for the layout of floating arresting facilities in different projects, different terrains and different operating conditions.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention can be implemented on any existing water conservancy and hydropower projects, as long as there is dam body concrete between the spillway dam section and the unit water inlet dam section where the support arm and anchoring device of the present invention can be arranged, the present invention can be implemented without opening movable guide grooves in the dam body or taking other measures to affect the dam body structure. The installation and fixation of the anchoring device in the present invention adopts advanced chemical anchor bolt rebar planting technology. Its installers can realize dry land construction in combination with the changes in the water level of the project reservoir, avoid working in water or underwater, and the installation and construction are convenient, safe and reliable. The spherical gasket in the anchoring device adopts a special design. Through the glue injection groove and glue injection hole provided on the spherical gasket, the chemical rebar injection glue can be easily pressed and injected into the cavity between the bolt hole and the chemical anchor bolt. The present invention cleverly combines the pulley buoy and the pulley into one, and the multiple main supporting wheels and side guide wheels arranged on the pulley have both supporting and guiding functions, so that the pulley buoy, the pulley and the entire floating arresting facility can operate smoothly, and can reduce the load of a single wheel and the amount of track construction engineering required therefor, and can effectively realize the floating arresting facility to rise and fall freely with the water level within the water level amplitude range without manual intervention. The arrangement of the floating arresting facility in the present invention can be set according to the requirements for the arrangement of the floating arresting facility for different projects, different terrains and different operating conditions, and has a wide range of adaptability and strong versatility.

[0023] By fixing the web and flange of the arm, the arm, longitudinal bars, transverse bars, pulley main track and pulley side guide track are effectively fixed; by fixing the pulley main track and pulley side guide track, the pulley and pulley pontoon can move up and down along the pulley main track and pulley side guide track. Compared with the traditional device, this device does not need to open a movable guide groove in the dam body or take other measures to affect the dam body structure, so that the floating arresting facilities consisting of the floating arresting row body, floating boats, pulleys and pulley pontoons can rise and fall freely with the rise and fall of water level within the water level variation range.

[0024] The present invention fixes the web and flange of the support arm by implanting chemical anchors into the concrete of the dam body. Compared with the traditional device, the device can adjust the specific position of the upstream end structure of the floating interception row through design calculation according to the terrain of the reservoir bank and the layout of the unit water inlet, thereby determining its size, and can meet the needs of different projects with different positions and layouts.

[0025] The present invention adopts advanced chemical anchor bolt planting technology, and its installers can realize dry land construction in combination with the change of engineering reservoir water level, avoid water or underwater operations, and the installation and construction are convenient, safe and reliable.

[0026] The web and flange of the support arm of the present invention are provided with single-sided welding cutouts in the manufacturing plant, and are transported to the construction site and welded to the anchor plate of the anchor device through cutout welding throughout the entire perimeter, thereby reducing the workload of on-site construction and improving the accuracy of installation.

[0027] The floating boat in the present invention can provide additional buoyancy to the floating arresting facility when a large number of floating objects gather in front of the floating arresting row body to form a large tension, so that the floating arresting facility can float in the water level fluctuation between the normal water storage level and the dead water level. The specific position of the upstream end structure of the floating arresting row can be adjusted and selected through design calculation according to the terrain of the shore of the reservoir area and the layout of the water inlet of the unit, so as to determine the size of the angle α between the support arm and the axis of the dam, thereby meeting the different position and layout requirements of different projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a top view of the overall arrangement of the self-floating type floating arresting system of the present invention;

[0029] Figure 2 It is a schematic diagram of the installation position of the track, the support arm and the anchoring device and part of the dam body in the present invention;

[0030] Figure 3 For the present invention Figure 2 A partial top view.

[0031] Figure 4 This is a schematic diagram of the installation position of the anchoring device in the present invention;

[0032] Figure 5 For the present invention Figure 4 A local enlarged view of location I;

[0033] Figure 6 For the present invention Figure 5 AA section view;

[0034] Figure 7 It is a schematic diagram of the support arm, the main track of the pulley, the side guide track of the pulley and the grid bar structure in the present invention;

[0035] Figure 8 It is an enlarged assembly diagram of the combined body of the pulley and the pulley buoy in the present invention;

[0036] Fig. 9 Another perspective of the enlarged assembly diagram of the pulley and pulley buoy combination of the present invention;

[0037] In the figure: 1. Existing dam; 2. Self-floating device in front of the dam; 3. Floating boat; 4. Drift arrester; 5. Upstream end structure; 6. Generator unit water inlet dam section; 7. Dam top platform; 8. Power station sluice dam section; 9. Track; 10. Assembly of pulley and pulley pontoon; 11. Dam body sluice hole; 12. Generator unit water inlet; 13. Shackle 1; 14. Strong steel ring; 15. Shackle 2; 16. Anchoring device; 17. Dam body reinforced concrete; 18. Chemical anchor bolts; 19. Chemical anchor glue; 20. Anchor plate; 21. Glue-filled spherical gasket; 22. Flat gasket; 23. Nut; 24. Support arm; 25. Support arm web and flange; 26. Longitudinal bars; 27. Transverse bars; 28. Main track of pulley; 29. ​​Side guide track of pulley; 30. Main supporting wheel; 31. Side guide wheel; 32. Pulley; 33. Pulley buoyancy box; 34. Connecting lug; 35. Connecting device. DETAILED DESCRIPTION

[0038] The following will be combined with the attached embodiment of the present invention Figure 1-9 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0039] The present invention provides a self-floating floating arresting system suitable for an existing water conservancy and hydropower project, which is arranged on the upstream water side of an existing dam 1. The floating arresting system is mainly composed of a self-floating device 2 in front of the dam, a floating boat 3, a floating arresting row body 4 and an upstream end structure 5. The existing dam 1, the self-floating device 2 in front of the dam, the floating boat 3, the floating arresting row body 4 and the upstream end structure 5 are connected in sequence; the floating arresting system also includes a track fixed in the vertical direction, which is located between the power station spillway section 8 and the unit water inlet dam section 6 of the dam body of the existing dam 1, and is fixedly installed on the dam body through a plurality of supporting arms 24.

[0040] The dam front self-floating device 2 is mainly composed of a pulley 32, a pulley pontoon 33 and a connecting device 35, wherein the pulley 32 and the pulley pontoon 33 are connected by the connecting device 35; the upper part of the pulley pontoon 33 is in a U-shape as a whole, the pulley 32 is located inside the U-shape, and is connected to the pulley pontoon 33 by a connecting device 35 arranged at the bottom of the pulley 32; the pulley 32 is in a U-shape as a whole, and a wheel set for rolling on the track is arranged on the inner side of the pulley 32, so that the pulley 32 and the pulley pontoon 33 can move along the track as the water level rises and falls within the water level variation range. The track can be raised and lowered freely; a connecting lug 34 is fixedly provided on the outer side of the body of the pulley 32, and the connecting lug 34 is connected to the floating boat 3 through a shackle 13, a strong steel ring 14, and a shackle 2 15; the floating boat 3 is connected to the floating arresting row body 4, and the floating arresting row body 4 is connected to the upstream end structure 5. The floating arresting row body 4, the floating boat 3, the pulley 32, and the pulley pontoon 33 constitute the floating arresting facility, which can be raised and lowered freely with the rise and fall of the water level within the water level amplitude range; the purpose of setting the floating boat 3 is to provide additional buoyancy to the self-floating device 2 in front of the dam when a large number of floating objects gather in front of the floating arresting row and a large tension is formed. The combination of the shackle 1, the shackle 2, and the strong steel ring can facilitate the assembly of various components, and at the same time, when the floating boat 3 and the floating arresting row body 4 need to be replaced or adjusted, the floating boat 3 and the floating arresting row body 4 can be easily removed for replacement or adjustment.

[0041] As attached Fig. 9As shown, the wheel set on the pulley 32 includes a main supporting wheel 30 and a side guide wheel 31, wherein a pair of main supporting wheels 30 are arranged at the upper and lower parts, and one side guide wheel 31 is arranged at the upper and lower parts, both of which cooperate with the track to operate; the track includes a pulley main track 28 and a pulley side guide track 29, wherein the main supporting wheel 30 cooperates with the pulley main track 28 and can roll along the pulley main track 28; the side guide wheel 31 cooperates with the pulley side guide track 29 and can roll along the pulley side guide track 29, so that the pulley 32 slides up and down along the track under different force conditions; wherein the contact part between the pulley main track 28 and the main supporting wheel 30 is welded with an austenitic stainless steel thin steel plate within the full stroke range. The body of the pulley 32 is manufactured by water-sealing welding, so that a closed space is formed inside the body; the pulley buoy 33 as a whole adopts a welded sealing structure, so that a closed space is formed inside it, and the pulley buoy 33 and the pulley 32 are mainly welded with austenitic stainless steel; the wheel bearings of the main supporting wheel 30 and the side guide wheel 31 are copper alloy inlaid self-lubricating bearings, and the wheel axle and the wheel body are made of martensitic stainless steel. The use of the above materials for the main parts of the pulley can enhance its maintenance-free performance, improve operational reliability and service life. The sealing area of ​​the pulley 32 and the pulley buoy 33 as a whole are sealed and pressure tested in the manufacturing plant to ensure reliable sealing and structural safety. The volume of the pulley pontoon 33 is determined according to the buoyancy required by the design calculation; the buoyancy provided by the pulley pontoon 33 and the pulley 32 itself should enable the self-floating device 2 in front of the dam to overcome the sum of its own gravity and the friction resistance formed by the tension of the floating barrier and the row body acting on the main track 28 of the pulley through the main supporting wheel 30 in the water, and maintain balance, so as to realize the free rise and fall of the self-floating device 2 in front of the dam with the rise and fall of the water level.

[0042] The arm 24 is fixed to the dam body by an anchoring device 16; longitudinal bars 26 are welded on the web and flange 25 of the arm 24 on the main channel side; transverse bars 27 are arranged between the upper and lower arms 24, and the overlaps between the transverse bars 27 and the longitudinal bars 26 are welded around; the bars are arranged mainly to prevent floating objects on the main channel side from passing through between the upper and lower arms 24 and entering the water inlet of the unit. Round steel is welded on the flange 25 on the main channel side of the arm 24 as longitudinal bars 26, and the spacing size of the longitudinal bars is determined according to the unit's requirements for the size of floating objects. In order to ensure the rigidity and stability of the longitudinal bars, transverse bars 27 are arranged between the upper and lower arms 24 as needed, and the overlaps between the transverse bars 27 and the longitudinal bars 26 are welded around. The anchoring device 16 is mainly composed of an anchor plate 20, a chemical anchor bolt 18, a chemical anchor glue 19, a glue-filled spherical gasket 21 and fasteners; the fasteners include a flat gasket 22 and a nut 23; the support arm 24, the longitudinal grid bar 26, the transverse grid bar 27 and the track are welded into a whole in the factory and then transported to the construction site for installation; the support arm web and flange 25 are opened with a single-sided welding cut in the factory, and after being transported to the construction site, the support arm web and flange 25 are welded to the anchor plate 20 of the anchoring device 16 through cut welding.

[0043] The installation process of the anchoring device 16 includes: when the reservoir water level drops to near the dead water level during the dry season at the construction site, a temporary automobile crane is used to build a construction platform on the dam top platform 7, and a bolt hole is drilled in the dam body reinforced concrete 17 between the power station spillway section 8 and the unit water inlet dam section 6 according to the design position and depth requirements, and the chemical anchor 18 is implanted in the pre-drilled bolt hole. After the anchor plate 20 is in place, the glue-filled spherical gasket 21 and the fastener are installed; wherein the glue-filled spherical gasket 21 is provided with a glue-filling groove and a glue-filling hole, which is used to pressurize and inject the chemical rebar-filling glue 19 into the cavity between the rebar-filling hole and the chemical anchor 18, and after the chemical rebar-filling glue 19 ages, the chemical anchor 18 can be effectively fixed in the dam body reinforced concrete 17; after the chemical anchor 18 is rebar-filled, the proportion of anchor bolts required by the relevant regulations and specifications is extracted for a pull-out test to detect the firmness of the rebar-filling. In this embodiment, 10% of the number of anchor bolts is extracted for a pull-out test. The design and installation of the embedded reinforcement shall be carried out in accordance with the relevant requirements of the "Concrete Structure Reinforcement Design Code" GB 50367-2013 and the "Building Structure Reinforcement Engineering Construction Quality Acceptance Code" GB 50550-2010. After it is determined to meet the requirements, the arm web and flange 25 are welded on the anchor plate 20.

[0044] The main materials of the track and anchor plate are low-alloy high-strength structural steel to ensure reliable structural strength; the anti-corrosion scheme adopts zinc spraying + paint coating, and the corrosion resistance must meet the anti-corrosion requirements for long-term operation in the water level variation area.

[0045] The angle α between the support arm 24 and the dam axis is adjusted through design calculation according to the terrain of the reservoir shore and the layout of the unit water inlet, and its size is determined in combination with the specific position of the upstream end structure 5; the value of the spacing dimension L of the support arm 24 is determined according to the calculated value of the tension of the main cable of the floating arresting row; the upstream end structure 5 is set as a fixed anchor point as needed, or set as a self-floating anchor point similar to the self-floating device in front of the dam, so as to meet the requirements for the layout of floating arresting facilities in different projects, different terrains and different operating conditions.

[0046] The present invention can be implemented on any existing water conservancy and hydropower projects, as long as there is dam body concrete between the spillway dam section and the unit water inlet dam section where the support arm and anchoring device of the present invention can be arranged, the present invention can be implemented without opening movable guide grooves in the dam body or taking other measures to affect the dam body structure. The installation and fixation of the anchoring device in the present invention adopts advanced chemical anchor bolt rebar planting technology. Its installers can realize dry land construction in combination with the changes in the water level of the project reservoir, avoid working in water or underwater, and the installation and construction are convenient, safe and reliable. The spherical gasket in the anchoring device adopts a special design. Through the glue injection groove and glue injection hole provided on the spherical gasket, the chemical rebar injection glue can be easily pressed and injected into the cavity between the bolt hole and the chemical anchor bolt. The present invention cleverly combines the pulley buoy and the pulley into one. The multiple main supporting wheels and side guide wheels arranged on the pulley have both supporting and guiding functions, so that the pulley buoy, the pulley and the entire floating arresting facility can operate smoothly, and can reduce the load of a single wheel and the amount of track construction engineering required therefor, and can effectively realize the floating arresting facility to rise and fall freely with the water level within the water level amplitude range without manual intervention. The arrangement of the floating arresting facility in the present invention can be set according to the requirements for the arrangement of the floating arresting facility for different projects, different terrains and different operating conditions, and has a wide range of adaptability, strong versatility and high promotion value.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-floating floating arresting system adapted to an existing water conservancy and hydropower project, arranged on the upstream water side of an existing dam (1), characterized in that: The floating arresting system mainly consists of a self-floating device (2) in front of the dam, a floating ship (3), a floating arresting row body (4) and an upstream end structure (5), wherein the existing dam (1), the self-floating device (2) in front of the dam, the floating ship (3), the floating arresting row body (4) and the upstream end structure (5) are connected in sequence; the floating arresting system also includes a track fixedly arranged in the vertical direction, the track is located between the power station spillway section (8) and the unit water inlet section (6) of the dam body of the existing dam (1), and is fixedly installed on the dam body through a plurality of supporting arms (24); The dam front self-floating device (2) is mainly composed of a pulley (32), a pulley buoyancy box (33) and a connecting device (35). The pulley (32) and the pulley buoyancy box (33) are connected by the connecting device (35); the upper part of the pulley buoyancy box (33) is U-shaped as a whole, the pulley (32) is located inside the U-shape, and is connected to the pulley buoyancy box (33) by the connecting device (35) arranged at the bottom of the pulley (32); the pulley (32) is U-shaped as a whole, and a wheel set for rolling on the track is arranged on the inner side of the pulley (32) so that the pulley (32) and the pulley (32) can be connected. The vehicle buoy (33) freely rises and falls along the track as the water level rises and falls within the water level variation range; a connecting lug (34) is fixedly provided on the outer side of the body of the pulley (32), and the connecting lug (34) is connected to the floating boat (3) through a shackle 1 (13), a strong steel ring (14), and a shackle 2 (15); the floating boat (3) is connected to the floating intercepting row body (4), and the floating intercepting row body (4) is connected to the upstream end structure (5); the floating intercepting facility composed of the floating intercepting row body (4), the floating boat (3), the pulley (32), and the pulley buoy (33) can freely rise and fall as the water level rises and falls within the water level variation range; The support arm (24) is fixed to the dam body by an anchoring device (16); longitudinal bars (26) are welded to the web and flange (25) of the support arm on the main channel side of the support arm (24); transverse bars (27) are arranged between the upper and lower support arms (24); and the transverse bars (27) are welded around the overlapped portions with the longitudinal bars (26); The anchoring device (16) is mainly composed of an anchoring plate (20), a chemical anchor bolt (18), a chemical anchor glue (19), a glue-filled spherical gasket (21) and a fastener; the support arm (24), the longitudinal grid bar (26), the transverse grid bar (27) and the track are welded into a whole in a factory and then transported to the construction site for installation; the support arm web and flange (25) are opened with a single-sided welding cut in the factory, and after being transported to the construction site, the support arm web and flange (25) are welded to the anchoring plate (20) of the anchoring device (16) through the cut welding of the whole circumference; The installation process of the anchoring device (16) comprises: when the reservoir water level drops to near the dead water level during the dry season at the construction site, a bolt hole is drilled in the dam body reinforced concrete (17) between the power station spillway section (8) and the unit water inlet dam section (6) according to the design position and depth requirements, and the chemical anchor bolt (18) is implanted in the bolt hole drilled in advance. After the anchor plate (20) is in place, the glue-filled spherical gasket (21) and the fastener are installed; wherein the glue-filled spherical gasket (21) is provided with a glue-filling groove and a glue-filling hole, which are used to pressurize and inject the chemical anchor glue (19) into the cavity between the bolt hole and the chemical anchor bolt (18), and after the chemical anchor glue (19) ages, the chemical anchor bolt (18) can be effectively fixed in the dam body reinforced concrete (17); and then the web and flange (25) of the support arm are welded to the anchor plate (20).

2. A self-floating arresting system adapted to existing water conservancy and hydropower projects according to claim 1, characterized in that: The wheel set comprises a main supporting wheel (30) and a side guide wheel (31), wherein a pair of the main supporting wheels (30) are arranged at the top and bottom, and one side guide wheel (31) is arranged at the top and bottom, and both of them cooperate with the track to run; The track comprises a pulley main track (28) and a pulley side guide track (29); the main supporting wheel (30) cooperates with the pulley main track (28) and can roll along the pulley main track (28); the side guide wheel (31) cooperates with the pulley side guide track (29) and can roll along the pulley side guide track (29) so that the pulley (32) can slide up and down along the track under different force conditions; wherein the contact part between the pulley main track (28) and the main supporting wheel (30) is welded with an austenitic stainless steel thin plate within the full stroke range.

3. A self-floating arresting system adapted to existing water conservancy and hydropower projects according to claim 2, characterized in that: Part of the body of the pulley (32) is manufactured using a water-sealed welding process, so that a closed space is formed in the area of ​​the partial body; the pulley buoy (33) as a whole adopts a welded sealing structure, so that a closed space is formed therein, and the pulley buoy (33) and the pulley (32) are mainly welded with austenitic stainless steel; the wheel bearings of the main supporting wheel (30) and the side guide wheel (31) are both copper alloy inlaid self-lubricating bearings, and the wheel axle and the wheel body are both made of martensitic stainless steel.

4. The self-floating arresting system adapted to existing water conservancy and hydropower projects according to claim 1 is characterized in that: The fastener comprises a flat washer (22) and a nut (23).

5. The self-floating floating arresting system adapted to existing water conservancy and hydropower projects according to claim 2 is characterized in that: The volume of the pulley buoyancy box (33) is determined according to the buoyancy required by the design calculation; the buoyancy provided by the pulley buoyancy box (33) and the pulley (32) itself should enable the self-floating device (2) in front of the dam to overcome the sum of its own gravity and the friction resistance formed by the floating tension acting on the main track (28) of the pulley through the main supporting wheel (30) in the water, and maintain balance, so as to realize the free rise and fall of the self-floating device (2) in front of the dam as the water level rises and falls.

6. The self-floating arresting system adapted to existing water conservancy and hydropower projects according to claim 1 is characterized in that: The construction process also includes: after the chemical anchor bolts (18) are planted, a pull-out test is performed on the anchor bolts in proportion to the number required by the relevant regulations and specifications to detect the firmness of the planted reinforcement; the design and installation of the planted reinforcement are carried out in accordance with national standards.

7. The self-floating arresting system adapted to existing water conservancy and hydropower projects according to claim 1 is characterized in that: The main material of the track and anchor plate is low-alloy high-strength structural steel, and the anti-corrosion solution is zinc spraying + paint coating.

8. The self-floating arresting system adapted to existing water conservancy and hydropower projects according to claim 1 is characterized in that: The angle α between the support arm (24) and the dam axis is adjusted through design calculation according to the topography of the reservoir bank and the layout of the unit water inlet, and its size is determined in combination with the specific position of the upstream end structure (5); the value of the spacing dimension L of the support arm (24) is determined according to the calculated value of the tension of the main cable of the floating arresting row; the upstream end structure (5) is set as a fixed anchor point according to needs, or is set as a self-floating anchor point similar to the structure of the self-floating device (2) in front of the dam, so as to meet the requirements of different projects, different terrains and different operating conditions for the layout of floating arresting facilities.

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