Unpowered screen device for nuclear power plant intake channel

Abstract

The application provides a kind of unpowered intercepting net device for nuclear power plant water intake channel, including two slide rails, two slide rails are fixed on the fixed pile on both sides of water intake channel respectively, each slide rail is extended to below water surface and is provided with a containing cavity along the length extension direction, first rope passing hole and second rope passing hole are communicated with containing cavity and are arranged at intervals along the length extension direction of slide rail;Each slide rail bottom is provided with a closed annular rope, the closed annular rope is arranged in first rope passing hole, containing cavity, second rope passing hole and the outside of slide rail;It also includes intercepting net, which includes cable and net body matched with cable, at least two interval arranged floats are provided on the cable, the top end of net body is installed on the cable, the bottom end is connected with the closed annular rope, the bottom of net body is connected with the closed annular rope;Intercepting net is configured to be able to dynamically adjust height without power under the cooperation of closed annular rope and slide rail.

Description

Technical Field

[0001] This invention relates to the field of cold source water intake technology for nuclear power plants, specifically to a non-powered interception net device for open intake channels in nuclear power plants. Background Technology

[0002] The stable operation of the cold source water intake system of a nuclear power plant is a key link in ensuring the safety of the nuclear power plant. As an important channel for cold source water intake, the water intake open channel needs to be blocked by interception devices to prevent aquatic organisms, floating objects and various debris from entering, so as to avoid blockage or damage to the circulating water filtration system and pump group.

[0003] Currently, the mainstream water intake interception solutions in the industry are mainly divided into two categories: one is the floating interception net, which consists of buoys, main cables and netting, and floats on the water surface by the buoyancy of the buoys and is fixed in the designated area by anchor chains or lateral traction; the other is the mechanically retractable interception net, which uses winches set on the bank foundations or pile foundations on both sides to achieve the raising and lowering adjustment of the interception net by actively retracting and lowering the cables.

[0004] Both existing interception schemes have significant drawbacks: floating interception nets lack adaptive adjustment capabilities, cannot change their posture or effective interception depth with water level fluctuations, and their protective effect is greatly reduced when facing large water level changes, resulting in insufficient reliability. Mechanically deployed and retractable interception nets, on the other hand, require dedicated power units and control systems, which not only result in complex system structures and high initial construction and subsequent operation and maintenance costs, but also pose a risk of single-point failure in the power or control modules, making it difficult to meet the long-term stable protection requirements of water intakes.

[0005] Based on this, the inventors of this application propose a non-powered interception net device for open intake channels of nuclear power plants, in order to solve one or more of the above-mentioned technical problems. Summary of the Invention

[0006] The present invention solves the above-mentioned technical problems through the following technical solution: This invention provides a non-powered interception net device for open intake channels in nuclear power plants, comprising: Two slide rails are fixed on fixed pile foundations on both sides of the water intake channel. One end of each slide rail extends below the water surface and is provided with a receiving cavity along its length extension direction. The slide rail is provided with a first rope passage hole and a second rope passage hole that are connected to the receiving cavity and are spaced apart along its length extension direction. Each of the slide rails has a closed loop rope at its bottom, and the closed loop rope passes through the first rope hole, the accommodating cavity, the second rope hole and the outside of the slide rail; The interception net includes a cable and a net body that cooperates with the cable. At least two spaced-apart floats are provided on the cable. The top end of the net body is installed on the cable, and the bottom end is connected to the closed loop rope. The interception net is configured to dynamically adjust its height with the water level without power under the cooperation of the closed loop rope and the slide rail.

[0007] According to one embodiment of the present invention, the slide rail is L-shaped and includes a vertical section and a horizontal section, the first rope passage hole is formed in the vertical section, and the second rope passage hole is formed in the horizontal section.

[0008] According to one embodiment of the present invention, the closed loop rope is provided with at least two sliding members, the sliding members being configured to pass through the receiving cavity and rise and fall with the net body; The slide rail has a guide groove extending along its length between the first rope hole and the second rope hole. The bottom end of the net body passes through the guide groove and is connected to the sliding member or the rope of the closed annular rope.

[0009] According to one embodiment of the present invention, the sliding member is a ball or a pulley.

[0010] According to one embodiment of the present invention, a first guide plate is provided on the outer side of the first rope passage hole facing the direction of the second rope passage hole, and a second guide plate is provided on the outer side of the second rope passage hole facing the direction of the first rope passage hole.

[0011] According to one embodiment of the present invention, both the first guide plate and the second guide plate are arc-shaped plates or circular plates.

[0012] According to one embodiment of the present invention, the second rope passage hole is the outlet of the horizontal section away from the vertical section, and a third guide plate is also provided at the second rope passage hole opposite to the second guide plate; The third guide plate is an arc-shaped plate or a circular plate.

[0013] According to one embodiment of the present invention, the net body is a planar interception net or a pocket-shaped interception net.

[0014] According to one embodiment of the present invention, at least two of the buoys are arranged at uniform intervals along the length extension direction of the cable.

[0015] According to one embodiment of the present invention, the net body and the closed loop rope are detachably connected.

[0016] The positive and progressive effects of this invention are as follows: This invention relates to a non-powered interception net device for open intake channels in nuclear power plants. By fixing two slide rails to fixed pile foundations on both sides of the intake channel, and utilizing the accommodating cavity within the slide rails and a closed-loop rope, combined with at least two spaced-apart floats on the rope, and with the rope and net bottom connected to the closed-loop rope, the device achieves dynamic height adjustment with water level without the need for an additional power unit or control system. This is achieved through the buoyancy of the floats, the gravity of the net and the loop rope, and the cooperation of the slide rails. This solves the problems of traditional floating interception nets' inability to adapt to water level fluctuations and insufficient protective reliability, while avoiding the complex structure, high cost, and single-point failure defects of mechanically deployed interception nets, ensuring a long-term stable interception and protection effect for the intake channel. Attached Figure Description

[0017] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the non-powered interception net device for open intake channels of nuclear power plants according to the present invention; Figure 2 for Figure 1 Schematic diagram of the middle slide rail; Figure 3 for Figure 1 A schematic diagram of the cooperation state between the middle slide rail and the closed ring rope at the first water level; Figure 4 for Figure 1 A schematic diagram of the coordination between the middle slide rail and the closed-loop rope at the second water level.

[0018] 1. Slide rail; 11. Receiving cavity; 12. First rope passage hole; 13. Second rope passage hole; 14. Vertical section; 15. Horizontal section; 16. First guide plate; 17. Second guide plate; 18. Third guide plate; 19. Guide groove; 2. Pile foundation; 3. Closed loop rope; 31. Sliding element; 4. Interception net; 41. Cable; 42. Net body; 43. Float. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0021] In existing nuclear power plant water intake channel interception nets, floating interception nets have the problems of being unable to adapt to water level fluctuations and insufficient protection reliability; while mechanically retractable nets have the problems of complex structure, high cost and single point of failure.

[0022] Based on this, such as Figure 1 and Figure 2 As shown, this application proposes a non-powered interception net device for a water intake channel of a nuclear power plant, comprising: two slide rails 1, which are respectively fixed on fixed pile foundations 2 on both sides of the water intake channel. One end of each slide rail 1 extends below the water surface and is provided with a receiving cavity 11 along its length extension direction. The slide rail 1 is provided with a first rope passage hole 12 and a second rope passage hole 13 that are connected to the receiving cavity 11 and are spaced apart along its length extension direction.

[0023] Specifically, the slide rail 1 and the pile foundation 2 can be connected by riveting, threaded connections, or welding, etc., without limitation. The top end of the slide rail 1 extends at least above the high water level, and the bottom end of the slide rail 1 extends at least below the low water level. The side end of the slide rail 1 can be installed on the side wall of the pile foundation 2, or it can extend independently below the water surface, without limitation. Because the side wall of the pile foundation 2 can provide more stable installation conditions for the slide rail 1, the slide rail 1 is preferably installed on the side wall of the pile foundation 2.

[0024] like Figure 3 and Figure 4 As shown, the high water level corresponds to the highest water level that the water intake channel can reach based on historical experience, such as the first water level. The low water level corresponds to the lowest water level that the water intake channel can reach based on historical experience, such as the second water level. The water level between the high and low water levels is the intermediate water level. The specific data for the high and low water levels are not limited here.

[0025] Please continue to refer to Figure 3 and Figure 4 Each slide rail 1 has a closed loop rope 3 at its bottom. The closed loop rope 3 passes through the first rope hole 12, the accommodating cavity 11, the second rope hole 13 and the outside of the slide rail 1.

[0026] For slide rail 1, the receiving cavity 11 can be formed only between the first rope passage hole 12 and the second rope passage hole 13. Alternatively, the receiving cavity 11 can extend through slide rail 1. Both methods are acceptable and are not limited here.

[0027] like Figure 2 and Figure 3 As shown, the closed-loop rope 3 is circular in shape and passes through the first rope hole 12, the accommodating cavity 11, the second rope hole 13 and the outside of the slide rail 1.

[0028] The interception net device also includes an interception net 4, which includes a cable 41 and a net body 42 that cooperates with the cable 41. The cable 41 is provided with at least two spaced floats 43. The top end of the net body 42 is installed on the cable 41, and the bottom end is connected to a closed loop rope 3. The bottom of the net body 42 is also connected to the closed loop rope 3. The interception net 4 is configured to dynamically adjust its height with the water level without power under the cooperation of the closed loop rope 3 and the slide rail 1.

[0029] The interceptor net 4 can be either a planar interceptor net or a pocket-shaped interceptor net; the specific form is not limited here.

[0030] The top of the interception net 4 is installed on the cable 41. The installation method can be binding or threading, which is not limited here.

[0031] The floats 43 mounted on the cable 41 allow the net 42 to be laid flat underwater under the buoyancy of the water. The bottom of the net 42 is constrained by the closed loop rope 3, thus ensuring that it is in a relatively taut state. The number of floats 43 on the cable 41 can be two, three, four, or more, depending on actual needs, and is not limited here.

[0032] like Figure 2 and Figure 3 As shown, the slide rail 1 is L-shaped and includes a vertical section 14 and a horizontal section 15. The first rope hole 12 is opened in the vertical section 14, and the second rope hole 13 is opened in the horizontal section 15.

[0033] The closed loop rope 3 is provided with at least two sliding members 31. The sliding members 31 are configured to pass through the receiving cavity 11 and rise and fall with the net body 42. The slide rail 1 is provided with a guide groove 19 in the section between the first rope hole 12 and the second rope hole 13 along its length extension direction. The bottom end of the net body 42 passes through the guide groove 19 and is connected to the sliding member 31 or the rope body of the closed loop rope 3.

[0034] like Figure 2 and Figure 3 As shown, the slide rail 1 can be composed of three plates and installed on the side wall of the pile foundation 2, with guide grooves 19 opened on the plates facing away from the pile foundation 2. Alternatively, the slide rail 1 can be composed of four plates, with the top installed on the pile foundation 2 and the bottom in a free state, with guide grooves 19 opened on one side wall of the slide rail 1 to slide and engage with the net body 42.

[0035] That is, the bottom of the net body 42 is limited by the guide groove 19. The net body 42 can be connected to the sliding member 31 or the closed ring rope 3 by binding or buckle connection, which is not limited here.

[0036] like Figure 3 As shown, when the water level rises, the float 43 rises with the water level, and the bottom of the net body 42 is also gradually and steadily raised under the guidance and limit of the guide groove 19. When the net body 42 is raised, it will drive the sliding member 31 to move along the accommodating cavity 11, thereby driving the closed ring rope 3 to rotate counterclockwise.

[0037] like Figure 4 As shown, when the water level drops, the float 43 descends, and the net body 42 gradually slides down along the guide groove 19 under the gravity of the sliding member 31 and its guiding cooperation with the slide rail 1, and is guided down along the vertical section 14 and the horizontal section 15 in sequence, until it finally leaves the guide groove 19.

[0038] Because the bottom of the net 42 is limited by the guide groove 19, the net 42 will not accumulate on the bottom of the pool when it moves downwards, but will instead spread out along the vertical section 14 and the horizontal section 15. When the bottom of the net 42 is separated from the guide groove 19, under the ring-driven action of the sliding member 31 and the closed ring rope 3, the net 42 will not accumulate on the bottom of the water, but will move towards the water surface, thus completely avoiding the problems of accumulation and friction on the bottom of the water during the downward movement of the net 42.

[0039] In other words, the net body 42 of this application fully utilizes the buoyancy of water, the gravity of the sliding member 31 and the constraint relationship of the guide groove 19 to achieve automatic lifting and lowering with the rise and fall of water level, without the need for external power or control signals, which is energy-saving and more reliable.

[0040] Optionally, the slider 31 can be a ball or a pulley. Choosing a ball or pulley as the slider 31 makes full use of its low friction characteristics, which can reduce the contact resistance between the slider 31 and the receiving cavity 11 of the slide rail 1, making the lifting and lowering movement of the interception net 4 smoother, thereby reducing energy loss.

[0041] like Figure 2 and Figure 3 As shown, a first guide plate 16 is provided on the outer side of the first rope hole 12 facing the direction of the second rope hole 13, and a second guide plate 17 is provided on the outer side of the second rope hole 13 facing the direction of the first rope hole 12.

[0042] By setting a first guide plate 16 and a second guide plate 17 facing each other on the outer sides of the first rope hole 12 and the second rope hole 13 respectively, the closed loop rope 3 can be accurately guided, avoiding hard contact or friction between the closed loop rope 3 and the edge of the first rope hole 12 or the second rope hole 13, effectively protecting the closed loop rope 3 from cutting and wear, and guiding the closed loop rope 3 to move along a preset path, preventing the closed loop rope 3 from deviating or getting stuck.

[0043] like Figure 2 As shown, both the first guide plate 16 and the second guide plate 17 are arc-shaped plates or circular plates. Figure 2 Taking the curved plate as an example, it can also be a circular plate; there is no limitation here.

[0044] The first guide plate 16 and the second guide plate 17 are respectively set as arc-shaped plates or circular plates. Their smooth surfaces enable the closed loop rope 3 to achieve smooth force transmission when in contact, avoiding stress concentration and further reducing wear on the closed loop rope 3. At the same time, the arc-shaped or circular structure can better adapt to the bending motion trajectory of the rope, resulting in better guidance and preventing the rope from getting stuck at the turning point, thus ensuring the continuity and smoothness of the lifting and lowering movement of the interception net 4.

[0045] Furthermore, the second rope passage 13 can be the outlet of the horizontal section 15 away from the vertical section 14, and a third guide plate 18 is also provided at the second rope passage 13, which is opposite to the second guide plate 17; the third guide plate 18 is an arc-shaped plate or a circular plate.

[0046] By adding a third guide plate 18 at the outlet of the second rope hole 13, which is opposite to the second guide plate 17, a two-way guiding structure is formed. This can play a dual role in avoiding and guiding the closed loop rope 3, preventing the closed loop rope 3 from getting tangled or rubbing against the end face of the slide rail 1 due to the change of direction at the outlet of the horizontal section 15. This ensures that the closed loop rope 3 moves smoothly along the extension direction of the horizontal section 15, and further improves the movement stability of the net body 42.

[0047] As described above, by fixing the slide rail 1 to the fixed pile foundations 2 on both sides, and using the accommodating cavity 11, the first rope passage hole 12 and the second rope passage hole 13 in conjunction with the closed ring rope 3, combined with the design of the cable 41 with the float 43 and the bottom of the cable 41 and the net body 42 respectively connected to the closed ring rope 3, no additional power device or control system is required. It can achieve self-adaptive adjustment of water level without power by relying solely on the buoyancy of the float 43, the gravity of the net body 42 and the sliding part 31 and the cooperation of the slide rail 1. This solves the problem that the traditional floating interception net 4 cannot adjust with the rise and fall of water level and has insufficient protection reliability. It also avoids the defects of mechanically retractable interception net 4, such as complex structure, high cost and single point of failure. Moreover, the overall structure is simple and the installation is stable, which can effectively ensure the continuity and stability of the interception and protection of the water intake open channel.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "joining", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can also refer to mechanical connections. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0050] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A non-powered interception net device for open intake channels in nuclear power plants, characterized in that, include: Two slide rails are fixed on fixed pile foundations on both sides of the water intake channel. One end of each slide rail extends below the water surface and is provided with a receiving cavity along its length extension direction. The slide rail is provided with a first rope passage hole and a second rope passage hole that are connected to the receiving cavity and are spaced apart along its length extension direction. Each of the slide rails has a closed loop rope at its bottom, and the closed loop rope passes through the first rope hole, the accommodating cavity, the second rope hole and the outside of the slide rail; The interception net includes a cable and a net body that cooperates with the cable. At least two spaced-apart floats are provided on the cable. The top end of the net body is installed on the cable, and the bottom end is connected to the closed loop rope. The interception net is configured to dynamically adjust its height with the water level without power under the cooperation of the closed loop rope and the slide rail. The closed loop rope is provided with at least two sliding members, which are configured to pass through the accommodating cavity and rise and fall with the net body; The slide rail has a guide groove extending along its length between the first rope hole and the second rope hole. The bottom end of the net body passes through the guide groove and is connected to the sliding member or the rope of the closed annular rope.

2. The non-powered interception net device for open intake channels of nuclear power plants according to claim 1, characterized in that, The slide rail is L-shaped and includes a vertical section and a horizontal section. The first rope passage hole is opened in the vertical section, and the second rope passage hole is opened in the horizontal section.

3. The non-powered interception net device for open intake channels of nuclear power plants according to claim 1, characterized in that, The sliding element is a ball or a pulley.

4. The non-powered interception net device for open intake channels of nuclear power plants according to claim 2, characterized in that, A first guide plate is provided on the outer side of the first rope passage hole facing the direction of the second rope passage hole, and a second guide plate is provided on the outer side of the second rope passage hole facing the direction of the first rope passage hole.

5. The non-powered interception net device for open intake channels of nuclear power plants according to claim 4, characterized in that, Both the first guide plate and the second guide plate are arc-shaped plates or circular plates.

6. The non-powered interception net device for open intake channels of nuclear power plants according to claim 4, characterized in that, The second rope passage hole is the outlet of the horizontal section away from the vertical section, and a third guide plate is also provided at the second rope passage hole, which is opposite to the second guide plate; The third guide plate is an arc-shaped plate or a circular plate.

7. The non-powered interception net device for open intake channels of nuclear power plants according to claim 1, characterized in that, The net is either a planar interception net or a pocket-shaped interception net.

8. The non-powered interception net device for open intake channels of nuclear power plants according to claim 1, characterized in that, At least two of the pontoons are evenly spaced along the length of the cable.

9. The non-powered interception net device for open intake channels of nuclear power plants according to claim 1, characterized in that, The net body is detachably connected to the closed loop rope.

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