A lifting gate for hydraulic engineering

Abstract

The present invention discloses a lifting gate for water conservancy projects, which includes an upstream river channel, a downstream river channel, and a lock chamber between the upstream river channel and the downstream river channel. A lifting gate is provided in the lock chamber. A grille is provided at the connection between the upstream river channel and the lock chamber. The lifting gate and the grille are alternately lifted and lowered by a first steel wire rope. Side sealing assemblies are provided on both sides of the lifting gate, and a bottom sealing assembly is provided below. The lifting gate realizes water stop and sealing through the side sealing assemblies and the bottom sealing assembly on both sides. A driving platform is provided at the top of the lock chamber, and a driving assembly for driving the opening and closing of the lifting gate is provided on the driving platform; when the lifting gate for water conservancy projects is in use, the alternating lifting and lowering of the grille can prevent sundries from entering the downstream river channel, and the blocked sundries are also conducive to cleaning. Moreover, after the gate is closed, it can ensure the sealing of the bottom and both sides of the gate to avoid water seepage, and it is suitable for popularization and use.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy projects, and particularly to a lifting gate for water conservancy projects. Background Art

[0002] In water conservancy projects, gates are very common. They are water retaining facilities used to close and open flood discharge channels and are important components of hydraulic structures. Usually, the upstream and downstream water volumes are controlled by gates. Gates can be classified into plane gates, arc gates, miter gates, arch gates, etc. according to their appearance shapes. Plane gates can be further divided into lifting gates, tipping gates, etc. Among them, lifting gates can be lifted through screws, worm gears and worm drives, hydraulics, electric drives, etc. to realize the opening and closing of the gates.

[0003] The invention patent with the publication number CN114427215B discloses a clogging prevention lifting gate for water conservancy projects, including a base; a housing provided on the base; a lifting assembly provided on the upper side inside the housing; a gate provided on one side of the lifting assembly; and a filtering assembly provided in the middle side inside the housing, which solves the technical problem of being unable to filter water flow and causing the gate to be clogged.

[0004] However, in actual use, the above-mentioned gate cannot realize the alternating lifting of the filter screen and the gate, which is not conducive to the cleaning of pollutants. At the same time, the bottom and both sides of the gate cannot be sealed, and water is likely to seep downstream along the bottom and both sides after the gate is closed, resulting in unsatisfactory use effects. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide a lifting gate for water conservancy projects, in which the alternating lifting of the grille during use can prevent sundries from entering the downstream river, and the blocked sundries are also conducive to cleaning, and the bottom and both sides of the gate can be sealed to avoid water seepage after the gate is closed.

[0006] To achieve the above purpose, the technical solution of the present invention is: a lifting gate for water conservancy projects, including an upstream river, a downstream river, and a gate chamber between the upstream river and the downstream river. A lifting gate is provided in the gate chamber, and a beam grid is provided on the back water surface of the lifting gate. A grille is provided at the connection between the upstream river and the gate chamber, and the grille and the lifting gate are arranged vertically offset. A rotating shaft is provided directly above the grille, and at least two rotating discs are provided on the rotating shaft. A first steel wire rope is provided inside the rotating disc. The upper surfaces of the lifting gate and the grille are fixedly connected by the first steel wire rope, and the lifting gate and the grille are alternately lifted by the first steel wire rope. Side sealing assemblies are provided on both sides of the lifting gate, and a bottom sealing assembly is provided below. The lifting gate realizes water stop and sealing through the side sealing assemblies and the bottom sealing assembly on both sides. A driving platform is provided at the top of the gate chamber, and a driving assembly for driving the lifting gate to open and close is provided on the driving platform.

[0007] Preferably, door grooves are provided on both sides of the inner wall of the gate chamber, and side base plates matching with the door grooves are provided on both sides of the lifting gate. A sealing cavity is provided on the outer surface of the side base plate along its length direction. The cross-section of the sealing cavity is circular and one end is open. The side base plates on both sides of the lifting gate are always located in the door groove; the side sealing assembly includes a sealing rubber tube, which is integrally arranged with the inner wall of the door groove, and two mutually matching fan-shaped gear shafts are arranged in the sealing rubber tube. The circumference of the fan-shaped gear shaft is provided with an extension plate extending outward, and when the fan-shaped gear shaft rotates, the sealing rubber tube is squeezed toward the inner wall of the sealing cavity through the extension plate.

[0008] Preferably, the inner diameter of the sealing cavity is larger than the outer diameter of the sealing rubber tube, the protruding length of the extension plate is larger than the radius of the sealing rubber tube, the extension plate and the sealing rubber tube are not in contact when the lifting gate is in operation, the bottom end of the sector gear shaft is rotatably connected to the gate chamber foundation, and the top end is rotatably connected to the lower surface of the driving platform, a stepper motor is provided on the surface of the driving platform, and the output shaft of the stepper motor is drivingly connected to one of the sector gear shafts.

[0009] Preferably, the bottom sealing assembly comprises two groups of gate sills on the river channel foundation, a movable gate base is provided between the two groups of gate sills, the movable gate base and the lifting gate are staggered up and down, and the movable gate base moves to the bottom of the lifting gate when the lifting gate is closed.

[0010] Preferably, the bottom of the lifting gate and the surface of the movable gate base are both provided with a slope surface, the slope surface of the movable gate base is provided with a wavy groove, the slope surface of the lifting gate is provided with a flexible sealing plate, the flexible sealing plate is matched with the wavy groove, the trough of the wavy groove is provided with a drainage hole, and the drainage hole is inclined along the slope surface.

[0011] Preferably, the movable gate base moves between the two groups of gate sills through a movable assembly, the movable assembly includes an optical axis fixed between the two groups of gate sills, a compression spring is provided around the optical axis, the movable assembly also includes a telescopic bellows, one end of the telescopic bellows is fixedly connected to the movable gate base, and the other end is fixedly connected to the gate sill, the optical axis and the compression spring are always in the telescopic bellows.

[0012] Preferably, the surface of the grille is arc-shaped, extension shafts are provided on both sides of the grille, rolling wheels are provided at the ends of the extension shafts, limiting grooves are provided on both sides of the inner wall of the gate chamber, and the rolling wheels always roll along the inner wall of the limiting grooves.

[0013] Preferably, guardrails are provided on both sides of the driving platform, a ladder is provided outside the lock chamber and is connected to the guardrails, and the driving assembly is arranged on the surface of the driving platform; the driving assembly includes a driving shaft, a ball screw, a bracket and a driving motor. The driving shaft is coaxially fixed to the ball screw, and the end of the ball screw extends outwards and is connected to the driving motor through a reducer. A ball nut that cooperates with the ball screw is arranged inside the bracket. When the driving shaft rotates through the ball screw, it can telescopically move along its own length direction. A second steel wire rope is wound around the circumference of the driving shaft, and the second steel wire rope passes through the driving platform and is fixedly connected to the lifting lug on the surface of the lifting gate; the driving motor and the reducer are fixed on the base, and the base cooperates with the slide rail on the surface of the driving platform.

[0014] Preferably, the bottom sealing assembly includes two relatively arranged movable gate bases. A moving assembly is arranged outside the movable gate bases, and the two movable gate bases are connected through a light shaft passing through. A trapezoidal concave cavity is arranged at the bottom of the lifting gate. Under normal conditions, the two movable gate bases do not contact each other, and when the lifting gate is closed, the two movable gate bases are attached to each other in the trapezoidal concave cavity.

[0015] Preferably, a semi-circular rubber strip is arranged on the inner top surface of the trapezoidal concave cavity. Arc-shaped grooves are arranged at the top corners of the opposite surfaces of the two movable gate bases, and a plurality of strip-shaped concave cavities are arranged below the arc-shaped grooves.

[0016] Compared with the prior art, the lifting gate for hydraulic engineering disclosed by the present invention has the following beneficial effects: 1. By alternately lifting the lifting gate and the grille, impurities and pollutants can be prevented from entering the downstream river, and at the same time, it is beneficial to lift and clean the intercepted impurities; when in use, the grille does not require additional control, which not only saves costs but also improves the control convenience of the grille; 2. The side sealing assembly swings outwards through the extension plate to squeeze the sealing rubber cylinder, so that the outer wall of the sealing rubber cylinder tightly contacts the inner wall of the sealing cavity, causing the sealing rubber cylinder to deform into an elliptical shape, and the extrusion part is between the sealing cavity and the extension plate, preventing the upstream water from seeping into the downstream river through both sides of the lifting gate; 3. When the lifting gate moves downward, it presses the movable gate base at the slope surface, causing the movable gate base to move directly below the lifting gate. Through the close cooperation of the slope surfaces of the two, bottom sealing can be achieved; the bottom sealing assembly and the side sealing assembly cooperate to achieve three-sided water stop and anti-seepage of the gate; 4. By horizontally translating the driving shaft, the rope releasing position, the through hole and the hanging point are always located on the same vertical line, preventing the second steel wire rope from winding and knotting on the driving shaft and also preventing the second steel wire rope from wearing in the through hole, improving the service life of the lifting drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of a lifting gate for hydraulic engineering of the present invention Figure 1 。

[0018] Figure 2Schematic diagram of the overall structure of a lifting gate for water conservancy projects according to the present invention Figure 2 。

[0019] Figure 3 Top view of a lifting gate for water conservancy projects according to the present invention.

[0020] Figure 4 Schematic diagram of the internal structure of a lifting gate for water conservancy projects according to the present invention.

[0021] Figure 5 Schematic diagram of the connection between the lifting gate and the grille in a lifting gate for water conservancy projects according to the present invention Figure 1 。

[0022] Figure 6 Schematic diagram of the connection between the lifting gate and the grille in a lifting gate for water conservancy projects according to the present invention Figure 2 。

[0023] Figure 7 Schematic diagram of the cooperation between the lifting gate and the gate chamber in the present invention.

[0024] Figure 8 According to the present invention Figure 7 Top view.

[0025] Figure 9 According to the present invention Figure 7 Enlarged schematic diagram of part A in the present invention.

[0026] Figure 10 According to the present invention Figure 8 Enlarged schematic diagram of part B in the present invention.

[0027] Figure 11 Schematic diagram of the deformation of the sealing rubber cylinder in the present invention.

[0028] Figure 12 Schematic diagram of the structure of the lifting gate and the movable gate foundation in the present invention Figure 1 。

[0029] Figure 13 Schematic diagram of the structure of the lifting gate and the movable gate foundation in the present invention Figure 2 。

[0030] Figure 14 Schematic diagram of the structure of the lifting gate and the movable gate foundation in the present invention Figure 3 。

[0031] Figure 15 Schematic diagram of the movement of the movable gate foundation in the present invention.

[0032] Figure 16 Schematic diagram of the cooperation between the lifting gate and the movable gate foundation in the present invention.

[0033] Figure 17 The enlarged structural schematic diagram of the C position in the present invention Figure 12

[0034] Figure 18 The enlarged structural schematic diagram of the D position in the present invention Figure 12

[0035] Figure 19 The enlarged structural schematic diagram of the E position in the present invention Figure 13

[0036] Figure 20 The connection schematic diagram of the driving mechanism and the lifting gate in the present invention

[0037] Figure 21 The structural schematic diagram of the second embodiment of the bottom sealing assembly in the present invention

[0038] Figure 22 The enlarged partial structural schematic diagram in the present invention Figure 21

[0039] Figure 23 The structural schematic diagram of the cooperation between the bottom sealing assembly and the lifting gate in the present invention

[0040] In the figure: 1. Upstream river channel; 2. Lock chamber; 21. Rotating shaft; 22. Rotating disk; 23. First steel wire rope; 24. Gate slot; 241. Sealing rubber cylinder; 242. Sector gear shaft; 243. Extension plate; 25. Limit slot; 3. Downstream river channel; 31. Bottom of gate sill; 32. Movable gate foundation; 321. Slope surface; 322. Wavy groove; 323. Sewage discharge hole; 324. Strip-shaped cavity; 33. Moving assembly; 331. Optical axis; 332. Compression spring; 333. Telescopic bellows; 4. Lifting gate; 41. Side base plate; 42. Sealing cavity; 43. Grid; 44. Flexible sealing plate; 45. Trapezoidal cavity; 46. Rubber belt; 5. Grille; 51. Extension shaft; 6. Driving platform; 61. Driving shaft; 611. Ball screw; 612. Ball nut; 62. Second steel wire rope; 63. Hole; 64. Driving motor; 641. Reducer; 65. Stepping motor; 66. Slide rail; 7. Guardrail; 8. Ladder. Detailed implementation manners

[0041] Now, the present invention will be further described in detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0042] Please refer to Figures 1 - 4 ​​​​, a lifting gate for water conservancy projects, including the upstream river channel 1, the downstream river channel 3, and the lock chamber 2 between the upstream river channel 1 and the downstream river channel 3. A lifting gate 4 is provided in the lock chamber 2. The opening and closing of the lifting gate 4 control the water flow transportation and interception in the river channel. The water-facing surface of the lifting gate 4 is arc-shaped, which is beneficial to dispersing the water flow and reducing the water pressure. A grillage 43 is provided on the back surface of the lifting gate 4. The grillage 43 can increase the overall strength of the lifting gate 4 and is also used to bear the pressure received on the water-facing surface; A grille 5 is provided at the connection between the upstream river channel 1 and the lock chamber 2. The grille 5 can be made of many materials such as stainless steel, iron mesh, or wood, as long as it can sink into the water. The grille 5 is arranged vertically offset from the lifting gate 4; As Figures 5 - 6 shown, a rotating shaft 21 is provided directly above the grille 5. At least two rotating discs 22 are provided on the rotating shaft 21. A first steel wire rope 23 is provided inside the rotating disc 22. The upper surfaces of the lifting gate 4 and the grille 5 are fixedly connected by the first steel wire rope 23. The lifting gate 4 and the grille 5 are alternately lifted and lowered by the first steel wire rope 23; Since the grille 5 and the lifting gate 4 are vertically offset and the two ends of the first steel wire rope 23 are connected to their upper surfaces, the moving directions of the grille 5 and the lifting gate 4 are opposite; That is: when the lifting gate 4 is opened (as Figure 5 shown), the grille 5 is located below, and the water flow passes through the grille 5 and flows into the downstream river channel 3. At this time, the grille 5 can intercept the impurity pollutants in the upstream river channel 1, prevent these impurity pollutants from entering the downstream river channel 3 along with the water flow, and also prevent these sundries from accumulating in the lock chamber 2; When the lifting gate 4 is closed, it will move downward. At this time, the lifting gate 4 pulls the first steel wire rope 23 by its own gravity to move the grille 5 upward. After closing, the grille 5 is located above, and the intercepted impurities can be cleaned; Such alternating lifting and lowering can prevent impurity pollutants from entering the downstream river channel 3, and is also beneficial to lifting and cleaning the intercepted impurities, so that the grille 5 does not need to be set separately, which not only saves costs but also improves the control convenience of the grille 5.

[0043] In this embodiment, side sealing components are provided on both sides of the lifting gate 4, and a bottom sealing component is provided below. The lifting gate 4 realizes water stop and sealing through the side sealing components and the bottom sealing component on both sides, preventing water from seeping downward from both sides and the bottom of the lifting gate 4 to the downstream river channel 3 after the water flow is intercepted. A driving platform 6 is provided at the top of the lock chamber 2, and a driving component for driving the opening and closing of the lifting gate 4 is provided on the driving platform 6.

[0044] It can be understood that the grille 5 in this embodiment does not require additional power drive, and only needs to be driven by the lifting and lowering of the lifting gate 4. When the lifting gate 4 rises, the grille 5 descends by its own gravity. When the lifting gate 4 descends through the driving component, it pulls the first steel wire rope 23 to lift the grille 5.

[0045] As Figures 7 - 10As shown, door grooves 24 are provided on both sides of the inner wall of the lock chamber 2. Side substrates 41 that cooperate with the door grooves 24 are provided on both sides of the lifting gate 4. A sealing cavity 42 is provided on the outer surface of the side substrate 41 along its own length direction. The cross-section of the sealing cavity 42 is circular and one end is open. The side substrates 41 on both sides of the lifting gate 4 are always located within the door grooves 24;

[0046] The side sealing assembly includes a sealing rubber cylinder 241. The sealing rubber cylinder 241 is integrally provided with the inner wall of the door groove 24. Their connection methods can be through embedded fixation, buckle bolt fixation, etc. Two mutually cooperating sector gear shafts 242 are provided inside the sealing rubber cylinder 241. The teeth on the circumferences of the two sector gear shafts 242 mesh with each other. An extension plate 243 that protrudes outward is provided on the circumference of the sector gear shaft 242. When the sector gear shaft 242 rotates, the sealing rubber cylinder 241 is squeezed against the inner wall of the sealing cavity 42 through the extension plate 243.

[0047] Wherein the inner diameter of the sealing cavity 42 is greater than the outer diameter of the sealing rubber cylinder 241, and the protruding length of the extension plate 243 is greater than the radius of the sealing rubber cylinder 241.

[0048] That is to say, the extension plate 243 can swing through the sector gear shaft 242. When the two extension plates 243 approach each other, the extension plate 243 faces the inner wall of the door groove 24. At this time, the circumference of the sealing rubber cylinder 241 does not contact the inner circumference of the sealing cavity 42, that is, there is no foreign object interference in the sealing cavity 42 of the lifting gate 4, and vertical lifting can be achieved;

[0049] When the lifting gate 4 descends in place to intercept and stop water, as Figure 11 shown, the two extension plates 243 swing outward and expand respectively. After expansion, the extension plate 243 will push the sealing rubber cylinder 241 to deform. Since the protruding length of the extension plate 243 is greater than the radius of the sealing rubber cylinder 241; therefore, when the extension plate 243 swings outward, it will squeeze the sealing rubber cylinder 241, making the outer wall of the sealing rubber cylinder 241 tightly contact the inner wall of the sealing cavity 42; at this time, the sealing rubber cylinder 241 is squeezed into an elliptical shape on both sides, and the squeezed part is between the sealing cavity 42 and the extension plate 243.

[0050] Similarly, when the lifting gate 4 needs to rise to release water, the two extension plates 243 swing close to each other through the sector gear shaft 242. At this time, the pressure of the edge of the extension plate 243 on the sealing rubber cylinder 241 gradually decreases to meet the lifting of the lifting gate 4 (side substrate 41 and sealing cavity 42) outside the sealing rubber cylinder 241.

[0051] After the lifting gate 4 intercepts and stops water, since the sealing rubber cylinders 241 on both sides are closely attached to the inner wall of the sealing cavity 42, a good sealing effect can be achieved, avoiding the water flow in the upstream river channel 1 from seeping downstream through both sides of the lifting gate 4.

[0052] In this embodiment, the bottom end of the sector gear shaft 242 is rotatably connected to the lock chamber foundation (hydraulic foundation), and the top end is rotatably connected to the lower surface of the driving platform 6. At the same time, the sector gear shaft 242 is always located inside the sealing rubber cylinder 241, which can provide good protection for the internal structure. Two stepping motors 65 are provided on the surface of the driving platform 6, and the output shafts of the two stepping motors 65 are in transmission connection with one of the sector gear shafts 242 on both sides; the two stepping motors 65 operate synchronously to achieve the sealing effect together.

[0053] As Figures 12 - 14 shown, in this embodiment, the bottom sealing assembly includes two sets of gate sill bottoms 31 on the river channel foundation. A movable gate foundation 32 is provided between the two sets of gate sill bottoms 31. As Figures 15 - 16 shown, the movable gate foundation 32 and the lifting gate 4 are arranged vertically offset. When the lifting gate 4 is closed, the movable gate foundation 32 moves directly below the lifting gate 4.

[0054] Specifically, both the bottom of the lifting gate 4 and the surface of the movable gate foundation 32 are provided with inclined planes 321. A wavy groove 322 is provided on the inclined plane 321 of the movable gate foundation 32, and a flexible sealing plate 44 is provided on the inclined plane 321 of the lifting gate 4. The flexible sealing plate 44 is in concave-convex fit with the wavy groove 322. As Figure 17 、 19 shown, a sewage discharge hole 323 is provided at the trough of the wavy groove 322, and the sewage discharge hole 323 is inclined along the inclined plane 321.

[0055] Please refer to Figure 15 again. Since the movable gate foundation 32 and the lifting gate 4 are arranged vertically offset, and both the bottom of the lifting gate 4 and the surface of the movable gate foundation 32 are provided with inclined planes 321, when the lifting gate 4 moves downward, it can press the movable gate foundation 32 at the inclined plane 321, causing the movable gate foundation 32 to move directly below the lifting gate 4. Through the close fit of the inclined planes 321 of the two, bottom sealing of the gate can be achieved;

[0056] During the process of the movable gate foundation 32 moving directly below the lifting gate 4, the flexible sealing plate 44 can enter the adapted wavy groove 322 as the movable gate foundation 32 moves. The thickness of the flexible sealing plate 44 is greater than the depth of the wavy groove 322; that is to say, after the movable gate foundation 32 and the lifting gate 4 are matched (as Figure 16 shown), the two inclined planes 321 are in contact with each other, and at the same time, the flexible sealing plate 44 is compressed and cooperates with the wavy groove 322, which can effectively achieve the sealing effect. Through the interception of the flexible sealing plate 44, water flow seeping into the downstream river channel 3 can be avoided.

[0057] In this embodiment, the bottom surface of the movable gate base 32 is always in contact with the hydraulic foundation (the bottom wall of the gate chamber), and at the same time, the slope of the slope surface 321 is greater than 45°. The large-angle slope is more conducive to the movement of the movable gate base 32 directly below the lifting gate 4.

[0058] During use, sediment is likely to remain in the wavy groove 322, and the retention of sediment will cause the peaks and valleys of the flexible sealing plate 44 not to fit tightly with the wavy groove 322, resulting in water seepage; while the inclined sewage discharge holes 323 facilitate the discharge of sediment; when in use, the flexible sealing plate 44 first contacts the wavy groove 322. As the movable gate base 32 moves, the flexible sealing plate 44 can scrape the sediment on the surface of the wavy groove 322. Since the sewage discharge holes 323 are provided at the valleys of the wavy groove 322, the scraped sediment will flow along the side wall into the valleys and finally flow out of the valleys, thereby realizing the external discharge of internal sediment and ensuring the tight fit between the flexible sealing plate 44 and the wavy groove 322.

[0059] In the solution of the present invention, the movable gate base 32 moves between the two gate sill bottoms 31 through the moving assembly 33, as Figure 18 shown. The moving assembly 33 includes a optical axis 331 fixed between the two gate sill bottoms 31. A compression spring 332 is arranged around the optical axis 331. The moving assembly 33 further includes a telescopic bellows 333. One end of the telescopic bellows 333 is fixedly connected to the movable gate base 32, and the other end is fixedly connected to the gate sill bottom 31. The optical axis 331 and the compression spring 332 are always inside the telescopic bellows 333. When the movable gate base 32 is pressed and moves, the compression spring 332 and the corrugated telescopic tube on one side are squeezed and contracted, and the compression spring 332 and the corrugated telescopic tube on the other side are stretched, so that the movable gate base 32 translates along the optical axis 331; after the lifting gate 4 releases the movable gate base 32, the movable gate base 32 returns to its original position with the compression springs 332 and the corrugated telescopic tubes on both sides.

[0060] As a preferred solution, the surface of the grille 5 is arc-shaped. Extension shafts 51 are provided on both sides of the grille 5. Rolling wheels are provided at the ends of the extension shafts 51. Limiting grooves 25 are provided on both sides of the inner wall of the gate chamber 2. The rolling wheels always roll along the inner walls of the limiting grooves 25.

[0061] Please refer to again Figures 3 - 4, guardrails 7 are provided on both sides of the driving platform 6, a ladder 8 communicating with the guardrails 7 is provided outside the lock chamber 2, a slot 63 for the rotating disc 22 to pass through is further provided on the surface of the driving platform 6, and the driving assembly is arranged on the surface of the driving platform 6; the driving assembly includes a driving shaft 61, a ball screw 611, brackets and a driving motor 64. The driving shaft 61 is coaxially fixed with the ball screw 611 and supported by two brackets. The end of the ball screw 611 extends outwards and is in transmission connection with the driving motor 64 through a speed reducer 641. A ball nut 612 cooperating with the ball screw 611 is arranged in the brackets. When the driving shaft 61 rotates through the ball screw 611, it can telescopically move along its own length direction. A second steel wire rope 62 is wound around the circumference of the driving shaft 61, and the second steel wire rope 62 passes through the driving platform 6 and is fixedly connected with the lifting lug on the surface of the lifting gate 4; the driving motor 64 and the speed reducer 641 are fixed on a base (not shown in the figure), and the base cooperates with the slide rail 66 on the surface of the driving platform 6.

[0062] The traditional method is to wind the steel wire rope around the driving shaft, and lift or lower the lifting gate 4 by rotating the driving shaft; however, since the steel wire rope is wound along the driving shaft, when the lifting gate 4 is lifted or lowered, the steel wire rope is prone to deflect and knot on the driving shaft, resulting in the lifting point of the gate and the rope releasing position not being on the same straight line. At this time, the steel wire rope will continuously rub against the through hole of the driving platform 6 and is easily damaged.

[0063] As Figure 20 shown, to ensure that the lifting point of the gate and the rope releasing position are always on the same vertical line, the driving shaft 61 can horizontally translate through the ball screw 611 and the ball nut 612, so that the second steel wire rope 62 can always vertically fix the lifting gate 4; as the driving shaft 61 horizontally translates, the rope releasing position also changes accordingly, so that the rope releasing position, the through hole (platform) and the lifting point are always on the same vertical line, avoiding the second steel wire rope 62 from winding and knotting on the driving shaft 61, and also avoiding the second steel wire rope 62 from wearing in the through hole.

[0064] It can be understood that a protective device such as a protective net or a rain shelter can also be erected above the driving platform 6 to protect the driving assembly from being damaged.

[0065] Please refer to Figures 20 - 23 , as the second embodiment of the present invention, the bottom sealing assembly may further include two relatively arranged movable gate bases 32. The two movable gate bases 32 can approach or move away from each other on the optical axis 331. A moving assembly 33 is provided outside the movable gate bases 32. The structure of the moving assembly 33 is the same as that of the above embodiment and will not be described in detail here. The two movable gate bases 32 are connected through the optical axis 331 in a penetrating manner. A trapezoidal concave cavity 45 is provided at the bottom of the lifting gate 4. Under normal conditions, the two movable gate bases 32 do not contact each other. When the lifting gate 4 is closed, the two movable gate bases 32 are attached to each other in the trapezoidal concave cavity 45.

[0066] Similar to the above embodiments, slope surfaces 321 are also provided on the outer sides of the two movable gate bases 32, and wavy grooves 322 are also provided on the slope surfaces 321; flexible sealing plates 44 that cooperate with the wavy cavities are also provided in the two inclined surfaces of the trapezoidal cavity 45;

[0067] Different from the above embodiments, the movable gate base 32 is composed of two relatively arranged parts, and the two movable gate bases 32 are vertically offset from the two inclined surfaces of the trapezoidal cavity 45; when the lifting gate 4 descends and closes, the two inclined surfaces respectively squeeze the corresponding two movable gate bases 32, causing the two movable gate bases 32 to approach each other until their opposite surfaces are in contact; as Figure 23 shown, after contact, the flexible sealing plates 44 cooperate with the wavy grooves 322 in the two inclined surfaces to form two front and rear water-stop seals, thus greatly improving the bottom gate sealing performance.

[0068] In addition, a semi-circular rubber strip 46 is provided on the inner top surface of the trapezoidal cavity 45, and arc-shaped grooves are provided at the top corners of the opposite surfaces of the two movable gate bases 32; after the lifting gate 4 cooperates with the two movable gate bases 32, the rubber strip 46 falls into the two arc-shaped grooves, and a plurality of strip-shaped cavities 324 are provided below the arc-shaped grooves, and corresponding elastic sealing strips are provided on the relatively arranged movable gate bases 32. Referring again to Figure 23 ; after the lifting gate 4 descends and closes the gate, the two movable gate bases 32 are in contact with each other, and at the same time the rubber strip 46 falls into the arc-shaped groove between the two movable gate bases 32, and a plurality of elastic sealing strips are in concave-convex fit between the sides (opposite surfaces), which can further improve the sealing effect of the gap.

[0069] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A lifting gate for water conservancy projects, comprising an upstream river channel, a downstream river channel, and a gate chamber between the upstream river channel and the downstream river channel, characterized in that, A lifting gate is provided inside the lock chamber. A grillage is provided on the water-retaining surface of the lifting gate. A grille is provided at the connection between the upstream river channel and the lock chamber. The grille and the lifting gate are arranged vertically offset. A rotating shaft is provided directly above the grille. At least two rotating discs are provided on the rotating shaft. A first steel wire rope is provided inside the rotating disc. The upper surfaces of the lifting gate and the grille are fixedly connected by the first steel wire rope. The lifting gate and the grille are alternately lifted and lowered by the first steel wire rope. Side seal assemblies are provided on both sides of the lifting gate, and a bottom seal assembly is provided below. The lifting gate realizes water stop and sealing through the side seal assemblies and the bottom seal assembly on both sides. A driving platform is provided at the top of the lock chamber. A driving assembly for driving the lifting gate to open and close is provided on the driving platform; Door grooves are provided on both sides of the inner wall of the lock chamber. Side base plates matched with the door grooves are provided on both sides of the lifting gate. A sealing cavity is provided on the outer surface of the side base plate along its own length direction. The cross section of the sealing cavity is circular and one end is open. The side base plates on both sides of the lifting gate are always located inside the door grooves; The side seal assembly includes a sealing rubber cylinder, which is integrally provided with the inner wall of the door groove. Two mutually cooperating sector gear shafts are provided inside the sealing rubber cylinder. An extension plate extending outward is provided on the circumference of the sector gear shaft. When the sector gear shaft rotates, the sealing rubber cylinder is extruded against the inner wall of the sealing cavity through the extension plate.

2. The lift gate for hydraulic engineering according to claim 1, wherein The inner diameter of the sealing cavity is greater than the outer diameter of the sealing rubber cylinder. The extension length of the extension plate is greater than the radius of the sealing rubber cylinder. The extension plate does not contact the sealing rubber cylinder during the operation of the lifting gate. The bottom end of the sector gear shaft is rotatably connected to the lock chamber foundation, and the top end is rotatably connected to the lower surface of the driving platform. A stepping motor is provided on the surface of the driving platform. The output shaft of the stepping motor is drivingly connected to one of the sector gear shafts.

3. The lifting gate for hydraulic engineering according to claim 1 or 2, characterized in that, The bottom seal assembly includes two sets of gate sill bottoms on the river channel foundation. A movable gate foundation is provided between the two sets of gate sill bottoms. The movable gate foundation and the lifting gate are arranged vertically offset. When the lifting gate is closed, the movable gate foundation moves directly below the lifting gate.

4. The lift gate for hydraulic engineering according to claim 3, characterized in that, Sloping surfaces are provided on the bottom of the lifting gate and the surface of the movable gate foundation. A wavy groove is provided on the sloping surface of the movable gate foundation. A flexible sealing plate is provided on the sloping surface of the lifting gate. The flexible sealing plate is in concave-convex fit with the wavy groove. A sewage discharge hole is provided at the trough of the wavy groove. The sewage discharge hole is inclined along the sloping surface.

5. The lifting gate for hydraulic engineering according to claim 4, characterized in that, The movable gate foundation moves between the two sets of gate sill bottoms through a moving assembly. The moving assembly includes a smooth shaft fixed between the two sets of gate sill bottoms. A compression spring is provided around the smooth shaft. The moving assembly further includes a telescopic bellows. One end of the telescopic bellows is fixedly connected to the movable gate foundation, and the other end is fixedly connected to the gate sill bottom. The smooth shaft and the compression spring are always located inside the telescopic bellows.

6. The lift gate for hydraulic engineering according to claim 1, characterized in that, The surface of the grille is arc-shaped. Extension shafts are provided on both sides of the grille. Rolling wheels are provided at the ends of the extension shafts. Limiting grooves are provided on both sides of the inner wall of the lock chamber. The rolling wheels always roll along the inner wall of the limiting groove.

7. The lift gate for hydraulic engineering according to claim 1, characterized in that, Guardrails are provided on both sides of the driving platform, and a ladder connecting the guardrails is provided on the outside of the lock chamber. The driving assembly is arranged on the surface of the driving platform. The driving assembly includes a driving shaft, a ball screw, a bracket and a driving motor. The driving shaft is coaxially fixed with the ball screw. The end of the ball screw extends outwards and is connected to the driving motor through a speed reducer. A ball nut cooperating with the ball screw is arranged in the bracket. When the driving shaft rotates through the ball screw, it can telescopically move along its own length direction. A second steel wire rope is wound around the circumference of the driving shaft. The second steel wire rope passes through the driving platform and is fixedly connected to the lifting lug on the surface of the lifting gate. The driving motor and the speed reducer are fixed on the base, and the base cooperates with the slide rail on the surface of the driving platform.

8. The lift gate for hydraulic engineering according to claim 1, characterized in that, The bottom sealing assembly includes two relatively arranged movable lock bases. A moving assembly is arranged on the outside of the movable lock base. The two movable lock bases are connected through a light shaft passing through. A trapezoidal concave cavity is arranged at the bottom of the lifting gate. Under normal conditions, the two movable lock bases do not contact. When the lifting gate is closed, the two movable lock bases are attached in the trapezoidal concave cavity.

9. The lifting gate for hydraulic engineering according to claim 8, wherein, A semi-circular rubber strip is arranged on the inner top surface of the trapezoidal concave cavity. Arc-shaped grooves are arranged at the top corners of the opposite surfaces of the two movable lock bases, and a plurality of strip-shaped concave cavities are arranged below the arc-shaped grooves.

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