Water conservancy device

Abstract

The utility model discloses a water conservancy device which comprises a gate body, a lifting lug is arranged on the top face of the gate body, the lifting lug is located above the top face of the gate body, the lifting lug comprises a lifting lug body and a connecting part which are connected with each other, the connecting part is fixedly connected with the gate body, and the lifting lug body and the gate body are spaced. A limiting shoulder is formed between the lifting lug body and the connecting part, the width of the lifting lug body is larger than that of the connecting part, and a lug hole is formed in the lifting lug body. According to the water conservancy device, the step-shaped limiting shoulder is formed between the lifting lug body and the connecting part, during lifting, the lifting lug can be connected with a lifting appliance of a hoist to lift a gate, the gate can be directly limited through cooperation of the limiting shoulder and the locking device, protruding circular beads do not need to be arranged on the two sides of the gate, and the lifting lug is convenient to use. The overall structure is simple and compact.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy equipment technology, and in particular to a water conservancy device. Background Technology

[0002] In the field of water conservancy engineering, water conservancy facilities are key facilities for realizing the rational allocation of water resources, flood control and drainage, etc. Among them, gates, as an important component of water conservancy facilities, play a core role in controlling water flow and regulating water level.

[0003] Currently, existing hydraulic systems typically feature shoulders on the middle of both sides of the gate, designed to meet the needs of gate installation and operation. However, this shoulder structure has significant drawbacks. Due to its large footprint, it is highly susceptible to collision with the inner wall of the gate slot during opening or closing. Such collisions not only cause wear and tear on the gate and gate slot, reducing the service life of the hydraulic system, but can also lead to gate malfunctions, affecting the accuracy and timeliness of water flow control. In severe cases, it can even cause system failure, threatening the safe and stable operation of the hydraulic project. Therefore, it is urgent to improve existing hydraulic systems to address the problems caused by the aforementioned shoulder structure. Utility Model Content

[0004] The main purpose of this utility model is to provide a hydraulic device to solve the problem that the shoulders set in the middle of both sides of the gate in the existing hydraulic device occupy too much space and are prone to collision with the inner wall of the gate slot.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The hydraulic apparatus according to this application includes:

[0007] The gate body has a lifting lug on its top surface, which is located above the top surface of the gate body. The lifting lug includes a lifting lug body and a connecting part that are connected to each other. The connecting part is fixedly connected to the gate body. The lifting lug body is spaced apart from the gate body. A limiting shoulder is formed between the lifting lug body and the connecting part. The width of the lifting lug body is greater than the width of the connecting part. The lifting lug body has an ear hole.

[0008] According to the hydraulic device of this application, the lifting lugs are centrally located in both the thickness and width directions of the gate body, and the lug holes extend in a straight line along the thickness direction of the gate body.

[0009] According to the hydraulic device of this application, the outline shape of the lifting lug body in the orthographic projection in the plane parallel to the gate body is an arc-shaped cap, and the lifting lug is a thin sheet with uniform thickness in the thickness direction of the gate body.

[0010] Optionally, the ear holes are circular, and the ear-hanging body includes an integrally formed semi-circular hat top and a rectangular hat body, with the center of the hat top coinciding with the center of the ear holes.

[0011] According to the hydraulic device of this application, the lifting lug body and the connecting part are integrally formed, and the connecting part and the gate body are welded together.

[0012] Optionally, a reinforcing rib is provided at the welding position of the connecting part and the gate body. The reinforcing rib is triangular and perpendicular to the gate body.

[0013] The hydraulic device according to this application also includes a gate slot and a locking device. Guide rails are respectively provided on both sides of the gate slot in the width direction. The gate is movably disposed in the gate slot in the height direction. Guide sliding components are provided on both sides of the gate in the width direction. The guide sliding components cooperate with the guide rails. The gate slot includes a first side wall and a second side wall opposite to each other in the thickness direction. The locking device includes a locking member. The locking member is disposed at the top of the first side wall. The locking member can rotate to engage or disengage between the bottom surface of the limiting shoulder and the top surface of the gate body.

[0014] Optionally, the top of the second side wall is provided with a flip-up cover plate, which is used to cover the gate slot. The cover plate is provided with a clearance opening, and the lifting lug is inserted into the clearance opening when the cover plate covers the gate slot.

[0015] Optionally, the hydraulic device also includes a dam body, which defines a gate slot. The dam body includes a first concrete structure and a second concrete structure, with the second concrete structure embedded in the first concrete structure. The second concrete structure defines the gate slot, and the first concrete structure is cast before the second concrete structure.

[0016] The technical solution provided by the utility model embodiments has the following advantages compared with the prior art:

[0017] The hydraulic device provided in this embodiment integrates a lifting lug into the top surface of the gate body, with the lifting lug body and the top surface of the gate body maintained at a distance. A stepped limiting shoulder is formed between the lifting lug body and the connecting part. During hoisting, the lifting lug can be connected to the hoist's lifting device to lift the gate, and can also directly cooperate with the locking device through the limiting shoulder to limit the gate, eliminating the need for protruding shoulders on both sides of the gate. The overall structure is simple and compact, eliminating the risk of contact between the gate and the inner wall of the gate slot during opening and closing, preventing problems such as component wear and jamming caused by collisions, and significantly reducing the maintenance cost of the gate and gate slot. At the same time, the spaced design between the lifting lug and the top surface of the gate body creates an independent stress transmission path for the lifting lug body when under force, which can effectively disperse the shear force and tensile force during hoisting, avoiding the fracture risk caused by stress concentration in traditional shoulders, improving the fatigue resistance of the lifting lug, and extending the overall service life of the hydraulic device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a gate based on existing technology;

[0019] Figure 2 A front view of a water conservancy device provided for some embodiments of this utility model;

[0020] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0021] Figure 4 A side view of a hydraulic device provided for an embodiment of this utility model;

[0022] Figure 5 A schematic diagram illustrating the cooperation between a hydraulic device and a hoist lifting device, provided for an embodiment of this utility model;

[0023] Figure 6 A schematic diagram of a water conservancy device provided for an embodiment of this utility model;

[0024] Figure 7 for Figure 6 A cross-sectional view of the gate slot in the BB direction.

[0025] Labeling: Gate body 10, lifting lug 11, lifting lug body 111, connecting part 112, limiting shoulder 113, ear hole 114, guide slide assembly 12, gate slot 20, guide rail 21, locking device 30, locking element 31, dam body 40, first concrete structure 41, second concrete structure 42.

[0026] The hoist lifting device is 100mm, the pin is 200mm, and the existing shoulder is 300mm. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] like Figures 2-5As shown, the hydraulic device according to the embodiment of this application includes a gate body 10. A lifting lug 11 is provided on the top surface of the gate body 10. The lifting lug 11 is located above the top surface of the gate body 10. The lifting lug 11 includes a lifting lug body 111 and a connecting part 112 connected to each other. The connecting part 112 is fixedly connected to the gate body 10. The lifting lug body 111 is spaced apart from the gate body 10. A limiting shoulder 113 is formed between the lifting lug body 111 and the connecting part 112. The width of the lifting lug body 111 is greater than the width of the connecting part 112. An ear hole 114 is provided on the lifting lug body 111.

[0029] In detail, the design of the lifting lug 11, positioned above the top surface, allows the hoist lifting device 100 to be directly and vertically connected from above, enabling quick connection to the lug hole 114 without tilting or lateral adjustment. This improves hoisting efficiency. The lug hole 114 connects directly to the hoist lifting device 100 (such as a hook, pin 200, wire rope clamp, etc.). Figure 5 As shown, this forms the force support point for lifting the gate. Through the through-hole 114, the pin 200 of the hoist lifting device 100 can be quickly inserted and locked, realizing a reliable connection between the gate body 10 and the hoisting equipment, and ensuring the stable transmission of load during the hoisting process.

[0030] The lifting lug body 111 and the connecting part 112 can be integrally formed or welded together, and the connecting part 112 and the gate body 10 can be integrally formed or welded together.

[0031] The lifting lug 11 can be perpendicular to the gate body 10 or parallel to the gate body 10, and can be set as needed.

[0032] Figure 1 The structure of a gate in the prior art is shown, and it can be seen that protruding shoulders 300 are provided on both sides of the gate.

[0033] According to the hydraulic device of this application embodiment, the lifting lug 11 is integrated into the top surface of the gate body 10, and the lifting lug body 111 is spaced apart from the top surface of the gate body 10. A stepped limiting shoulder 113 is formed between the lifting lug body 111 and the connecting part 112. During hoisting, the lifting lug 11 can be connected to the hoisting device of the hoist to lift the gate, and can also be directly engaged with the locking device 30 through the limiting shoulder 113 to limit the gate, without the need to set protruding shoulders 300 on both sides of the gate. Figure 1 As shown), the overall structure is simple and compact, and the risk of contact between the gate and the inner wall of the gate slot 20 during opening and closing is eliminated (e.g. Figure 3As shown, the increased distance between the gate slot 20 and the inner wall (compared to existing technologies) eliminates problems such as component wear and jamming caused by collisions, significantly reducing the maintenance costs of the gate and gate slot 20. Simultaneously, the spacing design between the lifting lug 11 and the top surface of the gate body 10 creates an independent stress transmission path for the lifting lug body 111 under load, effectively dispersing shear and tensile forces during hoisting. This avoids the risk of fracture caused by stress concentration in traditional shoulders 300, improves the fatigue resistance of the lifting lug 11, and extends the overall service life of the hydraulic equipment.

[0034] like Figure 2 and Figure 4 As shown, in the hydraulic device according to the embodiment of this application, the lifting lug 11 is centrally located in both the thickness and width directions of the gate body 10, and the lug hole 114 extends in a straight line along the thickness direction of the gate body 10.

[0035] In detail, the lifting lug 11 is centered in the thickness direction, ensuring that the line of action of the tension force coincides with the center plane of the gate body 10 during hoisting, avoiding lateral bending or torsional moment of the gate due to offset force. Centering in the width direction ensures that the lifting point coincides with the gate's center of gravity on the horizontal projection, reducing track jamming and swaying problems caused by center of gravity shift during hoisting, and improving the stability of opening and closing operations. The ear hole 114 runs straight through the thickness direction, ensuring that the connecting axis of the hoist lifting device 100 (such as the pin 200 or shackle) is completely aligned with the gate's thickness direction, allowing the load to be directly transferred to the lifting lug body 111 without complex angle conversion. Compared to inclined or curved channel designs, the ear hole 114 extends straight along the thickness direction of the gate body 10, avoiding local stress concentration. Especially when subjected to alternating loads (such as frequently opened and closed gates), it reduces the risk of fatigue cracks at the edges of the ear hole 114, extending the service life of the overall structure. In addition, the straight lug 114 is highly versatile, suitable for both flexible wire rope hoisting and rigid pin shaft 200 connection, without the need to adjust the structure of the lug 11 for different hoist types.

[0036] like Figure 2 and Figure 4 As shown, in the hydraulic device according to the embodiment of this application, the outline shape of the lifting lug body 111 in the plane parallel to the gate body 10 is an arc-shaped cap, and the lifting lug 11 is a thin sheet with a uniform thickness in the thickness direction of the gate body 10.

[0037] The curved profile, by eliminating sharp angles and right-angle transitions, significantly reduces stress concentration at the edges. Especially under alternating load conditions with frequent opening and closing, the curved design effectively delays the initiation of fatigue cracks and extends the service life of the lifting lug 11. The lifting lug 11 is a thin sheet of uniform thickness along the thickness direction of the gate body 10. The sheet structure can be directly formed by cutting, bending, or stamping steel plates. The uniform thickness facilitates welding (such as welding to the top surface of the gate body 10), and splicing can be achieved through automated welding equipment, reducing welding defects caused by manual intervention. In addition, the simple geometric features of the sheet structure make it easier to detect internal defects in subsequent inspections (such as penetrant testing and ultrasonic testing), improving quality control efficiency.

[0038] like Figure 2 As shown, in some embodiments, the ear hole 114 is circular, and the lifting lug body 111 includes an integrally formed semi-circular cap top and a rectangular cap body, with the center of the cap top coinciding with the center of the ear hole 114. The integrated design of the semi-circular cap top and the rectangular cap body (such as casting or stamping) eliminates the weak links of welding or bolted connections in traditional split structures, thus improving the overall tensile strength. The coincidence of the center of the cap top and the center of the ear hole 114 allows the line of action of the tensile load during hoisting (transmitted through the pin 200 of the ear hole 114) to pass directly through the geometric center of the cap top. Especially under the dynamic load of high-speed opening and closing of the gate, the symmetrical structure can effectively suppress vibration offset and improve the stability of the hoisting process. Since the center of the cap top and the center of the ear hole 114 coincide, when the lifting lug 11 is installed on the top surface of the gate, it is only necessary to ensure that the center of the ear hole 114 is aligned with the design coordinates to simultaneously ensure the symmetry of the cap top and avoid limit failure or uneven force due to installation deviation.

[0039] According to the hydraulic device of this application embodiment, the lifting lug body 111 and the connecting part 112 are integrally formed, and the connecting part 112 is welded to the gate body 10. The integral forming of the lifting lug body 111 and the connecting part 112 can improve the connection strength between the two, while the welding connection of the connecting part 112 and the gate body 10 can manufacture the lifting lug 11 and the gate body 10 separately, which can reduce the processing difficulty.

[0040] In some embodiments, a reinforcing rib is provided at the welding position of the connecting part 112 and the gate body 10. The reinforcing rib is triangular and perpendicular to the gate body 10.

[0041] According to the hydraulic device of this application embodiment, a triangular reinforcing rib plate perpendicular to the gate body 10 is provided at the welding position between the connecting part 112 and the gate body 10. The stable geometry of the triangle allows the load transmitted from the lifting lug 11 to the welding area to be evenly distributed to the gate body 10 along the hypotenuse and right-angle side of the rib plate, alleviating stress concentration at the weld joint and preventing localized cracking due to stress overload. The vertically arranged reinforcing rib plate forms a rigid support with the gate body 10, enhancing the overall rigidity of the connecting area of ​​the lifting lug 11, suppressing local deformation of the gate during hoisting or under water pressure, and enabling the load to be evenly transmitted through the synergistic effect of the reinforcing rib plate and the gate body 10, thus improving the reliability of the welded connection. Furthermore, the right-angle side of the triangular reinforcing rib plate can fit tightly against the edges of the connecting part 112 and the gate body 10, simplifying the processing and assembly process and further ensuring the stability of the connection between the lifting lug 11 and the gate body 10.

[0042] like Figure 6 As shown, the hydraulic device according to the embodiment of this application further includes a gate slot 20 and a locking device 30. Guide rails 21 are respectively provided on both sides of the gate slot 20 in the width direction. The gate is movably disposed in the gate slot 20 in the height direction. Guide sliding components 12 are provided on both sides of the gate in the width direction. The guide sliding components 12 cooperate with the guide rails 21. The gate slot 20 includes a first side wall and a second side wall opposite to each other in the thickness direction. The locking device 30 includes a locking member 31. The locking member 31 is disposed at the top of the first side wall. The locking member 31 can rotate to engage or disengage between the bottom surface of the limiting shoulder 113 and the top surface of the gate body 10.

[0043] In detail, the guide slide assembly 12 can be a component such as a slider, pulley or roller (for example, a slider with a groove is fixedly installed on the side of the gate, and the guide rail 21 is correspondingly set with a convex structure that matches the groove). It moves along the height direction of the guide rail 21 by sliding or rolling. During the opening and closing of the gate, the guide slide assemblies 12 on both sides slide precisely along the guide rail 21, effectively suppressing lateral swaying, tilting or jamming, and ensuring that the gate moves smoothly in the vertical direction.

[0044] The locking element 31 of the locking device 30 (such as a rotatable latch, pin 200, or limit rod) is rotatably installed on the top of the first side wall of the gate slot 20 through a hinge or pin 200 connection (for example, the middle part of the locking element 31 is hinged to the side wall through the pin 200 to form a rotation fulcrum). Its working principle is as follows: when the gate moves to the predetermined locking position, the locking element 31 is rotated so that its end is engaged in the stepped gap formed between the bottom surface of the limit shoulder 113 and the top surface of the gate body 10 (this gap is formed by the interval between the lifting lug body 111 and the top surface of the gate body 10), thereby fixing the gate in the horizontal direction; when unlocking, the locking element 31 is rotated in the opposite direction so that its end is disengaged from the gap to release the lock.

[0045] Figure 7 It shows Figure 6 A cross-sectional view of the gate slot 20 in the mid-section direction, without the gate body 10, to facilitate further description of the structural features of the gate slot 20.

[0046] like Figure 7 As shown, when the gate moves in the vertical direction, the guide slide components 12 on both sides slide along the guide rail 21 to ensure smooth and stable opening and closing, reducing the risk of component wear and jamming caused by operational deviation. The locking element 31 of the locking device 30 is set at the top of the first side wall of the gate slot 20. By rotating, it engages with the gap between the bottom surface of the limiting shoulder 113 and the top surface of the gate body 10. The stepped structure of the limiting shoulder 113 is used to lock the gate in the horizontal direction. There is no need to set additional protruding locking shoulders 300 on both sides of the gate. This avoids the problem of traditional shoulders 300 occupying a large space and easily bumping into the slot wall, and makes the locking operation simple and reliable. That is, when locking, the locking element 31 is directly engaged through the limiting shoulder 113. When unlocking, it can be disengaged by rotation. This improves the positioning accuracy and locking stability of the gate under different water level conditions.

[0047] In some embodiments, a flip-up cover plate is provided at the top of the second sidewall. The cover plate is used to cover the gate slot 20. An avoidance opening is provided on the cover plate. When the cover plate covers the gate slot 20, the lifting lug 11 passes through the avoidance opening.

[0048] A flip-up cover plate, located at the top of the second side wall of the gate slot 20, is installed at the top of the gate slot 20 via a hinge or other rotatable connection (e.g., the cover plate is fixed to the top of the second side wall via a pin 200 or a hinge on one side edge). Its main function is to cover the top opening of the gate slot 20 when the cover plate is flipped to the closed state, thus forming a closed protection for the internal space of the gate slot 20. When it is necessary to open or close the gate or perform maintenance, the cover plate can be flipped upwards to expose the top of the gate slot 20. The clearance opening on the cover plate is a through hole or notch that matches the shape of the lifting lug 11 (e.g., circular, rectangular, or the same shape as the projected outline of the lifting lug 11). Its function is to allow the lifting lug body 111 to pass through the clearance opening when the cover plate covers the gate slot 20, so that the top of the lifting lug 11 remains exposed and does not affect its connection with the hoist lifting device 100 or the cooperation between the limiting shoulder 113 and the locking member 31.

[0049] According to the hydraulic device of this application embodiment, the flip-up cover plate effectively blocks external debris (such as silt, dead branches, floating objects, etc.) from entering the gate slot 20 through the top opening of the closed gate slot 20. This prevents debris accumulation from causing the guide slide assembly 12 and guide rail 21 to jam, the locking member 31 to be obstructed from rotating, or the surface of the gate body 10 to wear. It is especially suitable for rivers with a lot of silt or open-air hydraulic engineering scenarios, significantly reducing equipment failures caused by foreign object intrusion. The flip axis of the cover plate (such as the hinge installation position) is usually parallel to or staggered from the rotation axis of the locking member 31 of the locking device 30 to avoid spatial interference between the two. The size of the clearance opening is precisely matched with the shape of the lifting lug body 111 (for example, the width of the clearance opening is slightly larger than the width of the lifting lug body 111, and the height meets the requirements for the lifting lug 11 to pass through), ensuring that when the cover plate is closed, the lifting lug 11 is only exposed through the clearance opening, and the rest is effectively protected by the cover plate.

[0050] like Figure 6 and Figure 7 As shown, in some embodiments, the hydraulic device further includes a dam body 40, which defines a gate slot 20. The dam body 40 includes a first concrete structure 41 and a second concrete structure 42. The second concrete structure 42 is embedded in the first concrete structure 41 and defines the gate slot 20. The first concrete structure 41 is cast before the second concrete structure 42.

[0051] Specifically, the first concrete structure 41 serves as the foundation of the dam body 40 and is cast in advance (for example, by formwork support, concrete pouring, and vibration curing on the construction site to form an integral structure). Its function is to provide the bottom support for the entire dam body 40 and reserve space or interface for subsequent construction. After the strength of the first concrete structure 41 reaches the design requirements (such as by natural curing to form sufficient compressive strength), the second concrete structure 42 is embedded in the preset area of ​​the first concrete structure 41. That is, by setting grooves, reserving steel bars, or roughening the joint surface on the first concrete structure 41, the second concrete structure 42 is tightly combined with the first concrete structure 41 during pouring, and finally the gate slot 20 is formed by the internal space of the second concrete structure 42.

[0052] The first concrete structure 41 can be cast on a large scale using standardized templates, which simplifies the overall support difficulty and is especially suitable for large-volume concrete construction (such as gravity dams and sluice gate dam bodies 40). The second concrete structure 42 is precisely positioned on the basis of the first concrete structure 41 (for example, by measuring and setting out to determine the axis and dimensions of the gate slot 20). It is cast using customized templates to form a regular gate slot 20 (such as a vertical wall surface and a smooth guide rail 21 installation surface), avoiding the dimensional deviation of the gate slot 20 caused by template deformation in traditional one-time casting, and ensuring the installation accuracy of the guide rail 21 and the smooth operation of the gate.

[0053] The top or side surface of the first concrete structure 41 serves as the pouring base for the second concrete structure 42. Roughening the surface increases its roughness, ensuring a tight bond between the two concrete layers. This results in a high level of impermeability at the interface, preventing water leakage from the internal gaps of the dam body 40. The inner wall of the gate slot 20, which is separately formed in the second concrete structure 42, can be finely treated through processes such as plastering and spraying with an anti-corrosion coating. Compared to a rough surface achieved through a single pour, this significantly improves resistance to water erosion and chemical corrosion, extending the service life of the dam body 40. Figure 3 (The direction of water flow is shown in the image).

[0054] The specific embodiments of the utility model have been described in detail above, but they are only examples, and the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the utility model are also within the scope of the utility model. Therefore, all equivalent transformations, modifications, and improvements made without departing from the spirit and principles of the utility model should be covered within the scope of the utility model.

Claims

1. A hydraulic device, characterized in that, include: The gate body has a lifting lug on its top surface, which is located above the top surface of the gate body. The lifting lug includes a lifting lug body and a connecting part that are connected to each other. The connecting part is fixedly connected to the gate body. The lifting lug body is spaced apart from the gate body. A limiting shoulder is formed between the lifting lug body and the connecting part. The width of the lifting lug body is greater than the width of the connecting part. The lifting lug body has an ear hole.

2. The hydraulic apparatus according to claim 1, characterized in that, The lifting lugs are centrally located in both the thickness and width directions of the gate body, and the lug holes extend in a straight line along the thickness direction of the gate body.

3. The hydraulic apparatus according to claim 1, characterized in that, The outline of the lifting lug body in the plane parallel to the gate body is an arc-shaped cap, and the lifting lug is a thin sheet with a uniform thickness in the thickness direction of the gate body.

4. The hydraulic apparatus according to claim 3, characterized in that, The ear hole is circular, and the ear-hanging body includes an integrally formed semi-circular cap top and a rectangular cap body, with the center of the cap top coinciding with the center of the ear hole.

5. The hydraulic apparatus according to any one of claims 1-4, characterized in that, The lifting lug body and the connecting part are integrally formed, and the connecting part is welded to the gate body.

6. The hydraulic apparatus according to claim 5, characterized in that, A reinforcing rib is provided at the welding position of the connecting part and the gate body. The reinforcing rib is triangular and perpendicular to the gate body.

7. The hydraulic apparatus according to claim 1, characterized in that, It also includes a gate slot and a locking device. Guide rails are respectively provided on both sides of the gate slot in the width direction. The gate is movably disposed in the gate slot in the height direction. Guide sliding components are provided on both sides of the gate in the width direction. The guide sliding components cooperate with the guide rails. The gate slot includes a first sidewall and a second sidewall opposite to each other in its own thickness direction. The locking device includes a locking member. The locking member is disposed at the top of the first sidewall. The locking member can rotate to engage or disengage between the bottom surface of the limiting shoulder and the top surface of the gate body.

8. The hydraulic apparatus according to claim 7, characterized in that, The top of the second sidewall is provided with a flip-up cover plate, which is used to cover the gate slot. The cover plate is provided with an avoidance opening, and when the cover plate covers the gate slot, the lifting lug passes through the avoidance opening.

9. The hydraulic apparatus according to claim 8, characterized in that, It also includes a dam body that defines the gate slot. The dam body includes a first concrete structure and a second concrete structure. The second concrete structure is embedded in the first concrete structure and defines the gate slot. The first concrete structure is cast before the second concrete structure.

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