A double-layer flap gate structure for backflow prevention in drainage culverts

Abstract

This application discloses a double-layer flap gate structure for preventing backflow in drainage box culverts, relating to the field of drainage box culvert flap gates. It includes gate bodies and a fixing frame, which is used to fix the gate body inside the box culvert. Two gate bodies are arranged vertically opposite each other and rotatably connected to the fixing frame. The rotation axis of the gate bodies is arranged along the width direction of the box culvert. The gate bodies rotate to open and close the box culvert. By arranging the gate bodies into upper and lower layers, when the upstream water level of the box culvert is between the lower and upper gate bodies, the lower gate body operates to achieve drainage, while the upper gate body does not operate. Therefore, when the upstream water level of the box culvert is low, only the lower gate body operates, eliminating the need to open both upper and lower gate bodies. This reduces the water pressure required for drainage and improves the drainage efficiency of the drainage box culvert.

Description

Technical Field

[0001] This application relates to the field of drainage box culvert flap gates, and in particular to a double-layer flap gate structure for preventing backflow in drainage box culverts. Background Technology

[0002] Currently, in drainage box culverts, flap gates use gravity as the power to close the gate, which can prevent water from flowing back into the box culvert. At the same time, flap gates use the force of the water flow as the power to open the gate, thus realizing the drainage function of the drainage box culvert.

[0003] In related technologies, flap gates are generally installed on the top of the inner wall of a box culvert, with the width of the box culvert as the axis of rotation. The flap gate uses its own weight to keep the drainage box culvert closed. When drainage is needed, the water flow in the box culvert impacts the flap gate, causing it to open. However, the flap gate has a certain weight, and a certain amount of water pressure needs to be accumulated before it can be opened during drainage, thus affecting drainage efficiency. Summary of the Invention

[0004] To improve the drainage efficiency of drainage box culverts, this application provides a double-layer flap gate structure for preventing backflow in drainage box culverts.

[0005] This application provides a double-layer flap gate structure for preventing backflow in drainage culverts, which adopts the following technical solution:

[0006] A double-layer flap gate structure for preventing backflow in a drainage box culvert includes a gate body and a fixing frame. The fixing frame is used to fix the box culvert inside. There are two gate bodies, which are arranged vertically opposite each other and are rotatably connected to the fixing frame. The rotation axis of the gate body is arranged along the width direction of the box culvert. The gate body rotates to open and close the box culvert.

[0007] By adopting the above technical solution, when the water level upstream of the culvert is higher than the lower gate, both the upper and lower gates operate to achieve drainage. When the water level upstream of the culvert is between the lower and upper gates, the lower gate operates to achieve drainage while the upper gate does not operate. This divides the gate into upper and lower gates. When the water level upstream of the culvert is low, only the lower gate operates, and there is no need to open both the upper and lower gates. This reduces the water pressure required for drainage and improves the drainage efficiency of the culvert.

[0008] Optionally, a scraper for cleaning the frame is slidably connected to the fixed frame along the width direction of the box culvert, and the fixed frame is provided with a driving component for driving the scraper to slide.

[0009] By adopting the above technical solution, some garbage (such as plastic bags) may easily stick to the fixed frame after long-term use, which will affect the drainage speed. However, by driving the scraper to slide through the drive component, the garbage stuck to the fixed frame can be cleaned away.

[0010] Optionally, the driving component includes a bidirectional lead screw, and two scrapers are provided. The bidirectional lead screw is rotatably connected to the fixed frame. The bidirectional lead screw rotates to drive the two scrapers to move closer or further apart. A transmission component is provided on the door body pivot, and the door body rotates to drive the bidirectional lead screw to rotate through the transmission component.

[0011] By adopting the above technical solution, when the door rotates, the transmission component drives the bidirectional lead screw to rotate, which in turn drives the scraper to slide. The drive frame has a simple structure and is easy to operate. The bidirectional lead screw also has a certain limiting function, which can limit the scraper to a certain position to a certain extent.

[0012] Optionally, the transmission component includes a first gear, which is coaxially and fixedly connected to the door body shaft, and a second gear is coaxially and fixedly connected to one end of the bidirectional lead screw, with the first gear and the second gear meshing together.

[0013] By adopting the above technical solution, when the door rotates, it drives gear one to rotate, which in turn drives gear two to rotate. The rotation of gear two drives the bidirectional lead screw to rotate. This transmission component has a simple structure and is easy to operate.

[0014] Optionally, a plurality of fixed cylinders are fixedly connected to the scraper, and a push rod is inserted into the fixed cylinder. The push rod slides through the fixed frame, and the fixed frame is provided with a drive assembly for driving the push rod to move.

[0015] By adopting the above technical solution, the drive component drives the push rod to slide, and the push rod slides out of the fixed frame, thereby pushing away the garbage adhering to the fixed frame and improving the garbage cleaning efficiency.

[0016] Optionally, the driving component spring is arranged along the insertion direction of the insertion rod, and the two ends of the spring in the length direction are respectively fixedly connected to the inner wall of the fixed cylinder and the push rod. When the spring is not deformed, the push rod passes through the fixed frame.

[0017] By adopting the above technical solution, in the initial position, the end of the push rod away from the fixed cylinder abuts against the outer wall of the fixed frame. When the scraper moves, the push rod disengages from the fixed frame and enters the gap on the fixed frame. Under the action of the spring, the push rod passes through the gap of the fixed frame.

[0018] Optionally, the fixed frame is fixedly connected to a rack along the sliding direction of the scraper, a take-up roller is rotatably connected to the scraper, a pull rope is fixedly connected to the push rod, the other end of the pull rope is wound and fixedly connected to the take-up roller, a gear three for meshing with the rack is coaxially fixedly connected to the take-up roller, and the rack is provided with a plurality of notches for disengaging the gear three from the rack.

[0019] By adopting the above technical solution, in the initial position, gear three and rack are engaged, spring is compressed, and when the door rotates, the scraper slides, and the scraper slides, causing gear three to move. When gear three is in the gap position of rack, gear three disengages from rack, spring returns to its original deformation, and push rod is pushed out. During the continued movement, gear three and rack re-engage, driving the winding roller to wind up. As gear three continues to move, gear three disengages from rack, and push rod is pushed out again, thereby enhancing the garbage cleaning effect.

[0020] Optionally, the end of the push rod away from the fixed cylinder is set with a pointed end.

[0021] By adopting the above technical solution, it is easy to break through the garbage and crush it.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] 1. This application sets the gate body into upper and lower layers. When the water level upstream of the box culvert is between the lower and upper gate bodies, the lower gate body works to achieve the purpose of drainage, while the upper gate body does not work. When the water level upstream of the box culvert is low, only the lower gate body works, and there is no need to open both the upper and lower gate bodies. This can reduce the water pressure required for drainage of the box culvert and improve the drainage efficiency of the drainage box culvert.

[0024] 2. This application uses intermittent ejection of the push rod to facilitate the cleaning of debris adhering to the fixed frame. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the overall structure of a drainage box culvert anti-backflow double-layer flap gate structure applied to a box culvert according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the overall structure of a double-layer flap gate structure for preventing backflow in a drainage culvert according to an embodiment of this application;

[0027] Figure 3 yes Figure 2 An enlarged schematic diagram of region A in the middle.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Gate body; 2. Fixing frame; 3. Box culvert; 4. Horizontal bar; 5. Vertical bar; 6. Cavity; 7. Scraper; 8. Double-acting screw; 9. Gear 1; 10. Gear 2; 11. Fixing cylinder; 12. Push rod; 13. Spring; 14. Winding roller; 15. Rack; 16. Gear 3; 17. Notch; 18. Pull rope. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0031] This application discloses a backflow prevention double-layer flap gate structure for a drainage culvert. (Refer to...) Figure 1 and Figure 2 The flap gate structure includes a fixed frame 2 and two gate bodies 1. The fixed frame 2 is used to fix it inside the box culvert 3. The fixed frame 2 is composed of multiple horizontal bars 4 and vertical bars 5. The multiple horizontal bars 4 and multiple vertical bars 5 form multiple cavities 6. The two gate bodies 1 are arranged vertically opposite each other and are rotatably connected to the fixed frame 2. The rotation axis of the gate body 1 is set along the width direction of the box culvert 3. The gate body 1 rotates to open and close the box culvert 3.

[0032] Reference Figure 2 and Figure 3 To facilitate the cleaning of trash, such as plastic bags, adhering to the fixing frame 2, a cleaning component for cleaning the fixing frame 2 is provided on the fixing frame 2. The cleaning component is set in two sets, and the two sets of cleaning components are located in the areas of the two door bodies 1 respectively. Each set of cleaning components includes two scrapers 7. The two scrapers 7 of the same cleaning component are slidably connected to the fixing frame 2 along the length direction of the door body 1. The fixing frame 2 is provided with a driving component for driving the two scrapers 7 on the same cleaning component to move closer or further apart from each other.

[0033] The driving component includes a bidirectional lead screw 8, a scraper 7 in the shape of an inverted L, the upper end of the scraper 7 abutting against the side of the fixed frame 2 away from the door body 1, the bidirectional lead screw 8 being rotatably connected to the side of the fixed frame 2 away from the door body 1, the rotation axis and length direction of the bidirectional lead screw 8 being set along the length direction of the door body 1, the two scrapers 7 of the same cleaning component being threadedly connected to the two reverse thread lines of the bidirectional lead screw 8 respectively, and a transmission component being provided on the door body 1, the rotation of the door body 1 driving the bidirectional lead screw 8 to rotate through the transmission component.

[0034] The transmission component includes gear 9, which is coaxially fixedly connected to the rotating shaft of the door body 1. One end of the bidirectional lead screw 8 is coaxially fixedly connected to gear 10. Gear 9 and gear 10 are meshed and connected, and gear 9 has more teeth than gear 10.

[0035] In another embodiment, the transmission component can also be a pulley, that is, pulleys are coaxially fixed on the rotating shaft of the door body 1 and the bidirectional lead screw 8, and then a belt is fitted on the two pulleys.

[0036] In this embodiment, a plurality of fixed cylinders 11 are fixedly connected to the side of the cover plate near the door body 1. The length direction of the fixed cylinder 11 is arranged along the thickness direction of the fixed frame 2. A push rod 12 is inserted into the fixed cylinder 11 along its own length direction. The end of the push rod 12 away from the fixed cylinder 11 is set with a pointed end. The push rod 12 slides to pass through the fixed frame 2. The fixed frame 2 is provided with a drive assembly for driving the push rod 12 to move.

[0037] To allow the push rod 12 to intermittently pass through the cavity 6 of the fixed frame 2, the drive assembly includes a spring 13. The spring 13 is arranged inside the fixed cylinder 11 along the length direction of the fixed cylinder 11. The two ends of the spring 13 along the length direction are respectively fixedly connected to the push rod 12 and the inner wall of the fixed cylinder 11. When the spring 13 is not deformed, the push rod 12 passes through the fixed frame 2. A take-up roller 14 is rotatably connected to the upper end of the scraper 7. A pull rope 18 is fixedly connected to the push rod 12. The other end of the pull rope 18 passes through the scraper 7 and is wound and fixedly connected to the take-up roller 14. A rack 15 is fixedly connected to the side of the fixed frame 2 away from the door body 1 along the sliding direction of the scraper 7. A gear 16 for meshing with the rack 15 is coaxially fixedly connected to the take-up roller 14. The rack 15 is provided with multiple notches 17 for disengaging the gear 16 from the rack 15. The width of the notch 17 is greater than the diameter of the gear 16.

[0038] The implementation principle of the anti-backflow double-layer flap gate structure of the drainage culvert 3 in this application embodiment is as follows: During operation, when the upstream water level of the culvert 3 is between the lower gate 1 and the upper gate 1, the lower gate 1 operates. When the upstream water level of the culvert 3 is higher than the lower gate 1, both the upper and lower gate 1 operate. When the gate 1 rotates, it drives the gear 1 9 to rotate, which in turn drives the gear 2 10 to rotate. The rotation of the gear 2 10 drives the bidirectional lead screw 8 to rotate. The rotation of the bidirectional lead screw 8 drives the two scrapers 7 to move closer to each other. During the process of the two scrapers 7 moving closer to each other, the gear 3 16 and the rack 15 mesh, causing the push rod 12 to be inserted into the fixed cylinder 11, and the spring 13 to deform. When the gear 3 16 moves to the notch 17 of the rack 15, the gear 3 16 rotates back, the spring 13 recovers its deformation, and pushes the push rod 12 out, so that the push rod 12 passes through the fixed frame 2 and cleans the garbage adhering to the cavity 6 of the fixed frame 2.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A double-layer flap gate structure for preventing backflow in drainage culverts, comprising a gate body (1), characterized in that: It also includes a fixing frame (2) for fixing inside the box culvert (3). There are two gates (1), which are arranged vertically opposite each other and rotatably connected to the fixing frame (2). The rotation axis of the gates (1) is arranged along the width direction of the box culvert (3). The gates (1) rotate to open and close the box culvert (3). The fixing frame (2) is composed of multiple horizontal bars (4) and multiple vertical bars (5). The enclosure is formed into multiple cavities (6); a scraper (7) for cleaning the fixed frame (2) is slidably connected along the width direction of the box culvert (3); the fixed frame (2) is provided with a driving component for driving the scraper (7) to slide; multiple fixed cylinders (11) are fixedly connected to the scraper (7); a push rod (12) is inserted into the fixed cylinder (11); the push rod (12) slides to pass through the fixed frame (2); the fixed frame (2) is provided with a driving component for cleaning the box culvert (3); a scraper (7) for cleaning the box culvert (2) is slidably connected along the width direction of ... The drive assembly for moving the push rod (12) includes a spring (13), which is arranged along the insertion direction of the push rod (12). The two ends of the spring (13) along its length are respectively fixedly connected to the inner wall of the fixed cylinder (11) and the push rod (12). When the spring (13) is not deformed, the push rod (12) protrudes from the fixed frame (2). The fixed frame (2) is fixedly connected with a rack (or toothed rack) along the sliding direction of the scraper (7). 15) A take-up roller (14) is rotatably connected to the scraper (7), and a pull rope (18) is fixedly connected to the push rod (12). The other end of the pull rope (18) is wound and fixedly connected to the take-up roller (14). A gear three (16) for meshing with the rack (15) is coaxially fixedly connected to the take-up roller (14). The rack (15) is provided with a plurality of notches (17) for disengaging the gear three (16) from the rack (15).

2. The anti-backflow double-layer flap gate structure for drainage culverts according to claim 1, characterized in that: The driving component includes a bidirectional lead screw (8), and two scrapers (7) are provided. The bidirectional lead screw (8) is rotatably connected to the fixed frame (2). The bidirectional lead screw (8) rotates to drive the two scrapers (7) to move closer or further away from each other. A transmission component is provided on the rotating shaft of the door body (1). The door body (1) rotates to drive the bidirectional lead screw (8) to rotate through the transmission component.

3. The anti-backflow double-layer flap gate structure for drainage culverts according to claim 2, characterized in that: The transmission component includes a gear one (9), which is coaxially fixedly connected to the rotating shaft of the door body (1). One end of the bidirectional lead screw (8) is coaxially fixedly connected to a gear two (10), and the gear one (9) and the gear two (10) are meshed together.

4. The anti-backflow double-layer flap gate structure for drainage culverts according to claim 1, characterized in that: The push rod (12) is pointed at the end away from the fixed cylinder (11).

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