Adjustable hydraulic engineering gate

Abstract

The utility model relates to the technical field of hydraulic engineering gates, in particular to an adjustable hydraulic engineering gate which comprises a first gate body and a second gate body, and the first gate body and the second gate body are in transmission connection with corresponding independent controllable linear executing mechanisms. The up-down movement of the first gate is used for adjusting the excess flow of water overflowing the top of the first gate; vertical movement of the second gate is used for adjusting the opening degree of the bottom of the second gate so as to control the water flow sectional area of the bottom drainage channel; and the sealing assembly always seals a gap between the opposite surfaces of the first gate and the second gate. By arranging the first gate and the second gate which are independently controlled, when flow is small, the first gate moves downwards, water flow overflows from the top, and therefore vibration and cavitation caused by high-speed turbulent flow are avoided; and when the flow is large, the first gate is controlled to move downwards and the second gate is controlled to move upwards to form a top and bottom double drainage channel, so that the whole gate bears balanced impact force, and the stability of the whole gate is improved.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering gate technology, specifically an adjustable water conservancy engineering gate. Background Technology

[0002] Traditional sluice gates typically adjust their opening by raising and lowering a single gate plate during flood discharge or drainage. Under low-flow conditions, a narrow gap needs to be opened at the bottom of the gate, creating a high-speed jet with a rapidly increasing velocity (up to 10-20 m / s) and a Reynolds number greater than 10. 6 When the flow enters a fully developed turbulent state, a strong shear layer is formed between the jet and the downstream water, and periodic vortex shedding induces gate vibration. On the other hand, the increased flow velocity causes the local pressure to drop to near the saturated vapor pressure of water. The water cavitation at low pressure forms cavitation bubbles. When the cavitation bubbles enter the high-pressure zone (such as downstream of the gate) with the water flow, they collapse, generating micro-jet and shock waves. The micro-jet velocity can reach 100 to 300 m / s, and the peak impact pressure can reach 0.1 to 1 GPa. Continuous impact causes fatigue spalling of the gate and gate slot surface, forming honeycomb-like cavitation pits. Vibration and cavitation threaten the safety and service life of the gate.

[0003] Under high flow conditions, the concentrated impact of water flow on one side of the gate can easily lead to structural fatigue or even damage. Utility Model Content

[0004] The purpose of this invention is to provide a split-type double gate that can be independently controlled, so as to solve the problems mentioned in the background art.

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

[0006] An adjustable hydraulic engineering gate includes a first gate and a second gate arranged in parallel front and rear along the water flow direction. The first gate and the second gate are slidably connected to a support frame, and the first gate and the second gate are drivenly connected to corresponding independent and controllable linear actuators.

[0007] The up-and-down movement of the first gate is used to regulate the flow rate of water overflowing the top of the first gate;

[0008] The up-and-down movement of the second gate is used to adjust the opening size at the bottom of the second gate in order to control the cross-sectional area of ​​the water flow in the bottom discharge channel;

[0009] It also includes a sealing assembly that always seals the gap between the opposing surfaces of the first and second gates.

[0010] Preferably, the sealing assembly includes a middle support body and an outer rubber layer. The two ends of the support body are connected to the support frame. The outer rubber layer wraps around the support body, and the outer diameter of the outer rubber layer is larger than the gap between the opposing surfaces of the first gate and the second gate to form an interference fit. The sealing is achieved by the elastic deformation generated by the outer rubber layer under pressure.

[0011] Preferably, the sealing assembly further includes a central shaft, the support body is fitted onto the central shaft and can rotate around the central shaft, and the two ends of the central shaft are fixedly connected to the support frame;

[0012] The outer rubber layer extends outward at both ends to form sealing sections, and the inner cavity of the sealing section is a gradually expanding conical surface;

[0013] The support frame is provided with a sealing groove corresponding to the position of the sealing section. The diameter of the sealing groove is larger than the outer diameter of the sealing section and forms a clearance fit with it. A sealing cone adapted to the conical surface is provided in the sealing groove. The sealing cone is interference-fitted with the conical surface. The rotational sealing between the inner and outer walls of the sealing section and the sealing cone and sealing groove is achieved through the elastic deformation and expansion of the sealing section.

[0014] Preferably, a cleaning brush is provided directly below the sealing assembly.

[0015] Preferably, when the second gate is in its lowest position, the sealing assembly is close to the top surface of the second gate.

[0016] Preferably, the upper and lower end faces of the first gate and the second gate are both arc surfaces.

[0017] Preferably, a limiting block is provided in the sliding groove where the support frame is slidably connected to the first gate and the second gate. The limiting block restricts the vertical movement range of the first gate and the second gate to prevent them from losing contact with the sealing component during movement.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model sets up independently controlled first and second gates. When the flow rate is low, the first gate moves downward and the water overflows from the top, thereby avoiding the vibration and cavitation caused by high-speed turbulence generated by the narrow gap at the bottom of ordinary gates. When the flow rate is high, the first gate moves downward and the second gate moves upward, forming a double discharge channel at the top and bottom. The impact force of the water flow is dispersed to the top of the first gate and the bottom of the second gate, so that the entire gate bears a more balanced impact force and improves the stability of the entire gate.

[0020] 2. A sealing assembly is installed. The elastic deformation of the outer rubber layer maintains close contact with the first and second gates, ensuring effective sealing of the gap between the first and second gate surfaces. In addition, the interference fit between the sealing cone and the conical surface of the sealing section achieves rotational sealing between the sealing assembly and the support frame contact surface, thereby achieving rolling contact between the outer rubber layer and the first and second gates. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of this utility model;

[0022] Figure 2 Top view of this utility model;

[0023] Figure 3 A schematic diagram of the structure of this utility model after the support frame has been removed;

[0024] Figure 4 Top view of this utility model after the support frame has been removed;

[0025] Figure 5 This utility model Figure 3 Enlarged view of point A in the middle;

[0026] Figure 6 A partial sectional view of the sealing component and the support frame after assembly in this utility model.

[0027] In the figure: 1. Support frame; 2. First gate; 3. Second gate; 4. Sealing assembly; 41. Support body; 42. Outer rubber layer; 43. Central shaft; 44. Sealing section; 45. Conical surface; 46. Sealing groove; 47. Sealing cone; 5. Cleaning brush; 51. Cleaning part; 52. Fixing part. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This utility model provides a technical solution:

[0030] See Figure 1 and Figure 2An adjustable hydraulic engineering gate includes a first gate 2 and a second gate 3 arranged parallel to each other along the water flow direction. The first gate 2 and the second gate 3 are slidably connected to a support frame 1, and the first gate 2 and the second gate 3 are driven by corresponding independent and controllable linear actuators. The linear actuators can be motor screws, gear racks, hydraulic rods, electric push rods, motor drums, or any technical solution known to those skilled in the art that can achieve independent control of the first gate 2 and the second gate 3. On the other hand, the problem of sliding the first gate 2 and the second gate 3 along the sliding groove on the support frame 1 and achieving sliding sealing between the sliding groove and the sides of the first gate 2 and the second gate 3 can be solved by using existing solutions, and the specific structure will not be described in detail.

[0031] The up-and-down movement of the first gate 2 is used to regulate the flow rate of water overflowing the top of the first gate 2;

[0032] The up-and-down movement of the second gate 3 is used to adjust the opening size at the bottom of the second gate 3 in order to control the cross-sectional area of ​​the water flow in the bottom discharge channel;

[0033] It also includes a sealing assembly 4 that always seals the gap between the opposing surfaces of the first gate 2 and the second gate 3.

[0034] See Figure 3 , Figure 4 , Figure 5 and Figure 6 The sealing component 4 includes a support body 41 and an outer rubber layer 42. The two ends of the support body 41 are connected to the support frame 1. The outer rubber layer 42 wraps around the support body 41, and the outer diameter of the outer rubber layer 42 is larger than the gap between the opposing surfaces of the first gate 2 and the second gate 3, forming an interference fit. The sealing is achieved by the elastic deformation of the outer rubber layer 42 under pressure. In this scheme, the first gate 2 and the second gate 3 slide in contact with the outer rubber layer 42 during movement, and the gap is sealed by the elastic deformation of the outer rubber layer 42.

[0035] Based on the above scheme, the sealing assembly 4 also includes a central shaft 43, the support body 41 is fitted onto the central shaft 43 and can rotate around the central shaft 43, and the two ends of the central shaft 43 are fixedly connected to the support frame 1;

[0036] The outer rubber layer 42 extends outward from both ends to be flush with the two ends of the support body 41 to form a sealing section 44. The inner cavity of the sealing section 44 is a gradually expanding conical surface 45.

[0037] A sealing groove 46 is provided on the support frame 1 at the position corresponding to the sealing section 44. The diameter of the sealing groove 46 is larger than the outer diameter of the sealing section 44, forming a clearance fit with it. A sealing cone 47 adapted to the conical surface 45 is provided in the sealing groove 46. The sealing cone 47 and the conical surface 45 are interference-fitted. After installation, the sealing cone 47 compresses the conical surface 45, causing it to expand and elastically deform. After the sealing section 44 expands, it eliminates the gap between the outer wall of the sealing section 44 and the inner wall of the sealing groove 46, and they come into close contact. The conical surface 45 of the sealing section 44 elastically deforms and comes into close contact with the sealing cone 47, achieving a rotary seal. In this scheme, the first gate 2 and the second gate 3 roll into contact with the outer rubber 42 during movement. At the same time, the sealing cone 47 is interference-fitted with the conical surface 45 of the sealing section 44, achieving a rotary seal between the sealing assembly 4 and the support frame.

[0038] See Figure 3 and Figure 5 A cleaning brush 5 is located directly below the sealing assembly 4. The cleaning part 51 of the cleaning brush 5 contacts the circumferential surface of the outer rubber layer 42. The cleaning brush 5 is positioned along the length of the sealing assembly 4, and the fixing part 52 of the cleaning brush 5 can be fixedly connected to the support frame. During the movement of the first gate 2 or the second gate 3, which drives the outer rubber layer 42 to rotate, the cleaning brush 5 can clean the surface of the outer rubber layer 42, preventing stains or particles adhering to the outer rubber layer 42 from affecting the sealing effect and the service life of the outer rubber layer 42.

[0039] When the second gate 3 is in its lowest position (i.e., the second gate 3 is completely closed), the outer circle of the outer rubber layer 42 is tangent to the top surface of the second gate 3. If at this time, the first gate 2 is in its highest position (i.e., the first gate 2 is also completely closed), the outer circle of the outer rubber layer 42 is tangent to the bottom surface of the first gate 2. This means that the height of the sealing component 4 is close to the fixed height of the second gate 3. With this setting, the first gate 2 and the second gate 3 can have the maximum range of movement while ensuring sealing.

[0040] The upper and lower ends of the first gate 2 and the second gate 3 are both arc surfaces.

[0041] Limiting blocks are provided in the sliding grooves where the support frame 1 is slidably connected to the first gate 2 and the second gate 3. The limiting blocks restrict the vertical movement range of the first gate 2 and the second gate 3 to prevent them from detaching from the sealing component 4 during movement. The limiting blocks can be fixedly welded into the sliding groove or can be detachably installed in the sliding groove. For example, a through hole can be opened, which connects to the sliding groove. The limiting block is threaded to the through hole and extends into the sliding groove to perform the limiting function. The detachable limiting blocks can facilitate the disassembly of the first gate 2 and the second gate 3.

[0042] When using this utility model, the first gate 2 and the second gate 3 are driven independently by a linear actuator. At low flow rates, only the first gate 2 moves downward, and the water overflows from the top, thereby avoiding the vibration and cavitation caused by high-speed turbulence generated by the narrow gap at the bottom of a normal gate. At high flow rates, the first gate 2 moves downward and the second gate 3 moves upward, forming a double discharge channel at the top and bottom. The impact force of the water flow is dispersed to the top of the first gate 2 and the bottom of the second gate 3, so that the entire gate bears the balanced impact force and improves the stability of the entire gate.

[0043] During the adjustment of the first gate 2 or the second gate 3, the outer rubber 42 is always in contact with the first gate 2 and the second gate 3. The elastic deformation compensates for the gap between the outer rubber 42 and the plate surface of the first gate 2 or the second gate 3 caused by the vibration caused by the water flow impacting the first gate 2 or the second gate 3, effectively ensuring the sealing effect.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable sluice gate for hydraulic engineering, characterized in that, It includes a first gate (2) and a second gate (3) arranged in parallel front and rear along the direction of water flow. The first gate (2) and the second gate (3) are slidably connected to the support frame (1), and the first gate (2) and the second gate (3) are drivenly connected to corresponding independent and controllable linear actuators. The up-and-down movement of the first gate (2) is used to regulate the flow rate of water overflowing the top of the first gate (2); The up-and-down movement of the second gate (3) is used to adjust the opening size at the bottom of the second gate (3) in order to control the cross-sectional area of ​​the water flow in the bottom discharge channel; It also includes a sealing assembly (4) that always seals the gap between the opposing surfaces of the first gate (2) and the second gate (3).

2. The adjustable hydraulic engineering gate according to claim 1, characterized in that, The sealing assembly (4) includes a middle support (41) and an outer rubber layer (42). The two ends of the support (41) are connected to the support frame (1). The outer rubber layer (42) wraps around the support (41), and the outer diameter of the outer rubber layer (42) is larger than the gap between the opposite surfaces of the first gate (2) and the second gate (3) to form an interference fit. The sealing is achieved by the elastic deformation generated by the outer rubber layer (42) under pressure.

3. An adjustable hydraulic engineering gate according to claim 2, characterized in that, The sealing assembly (4) also includes a central shaft (43), the support body (41) is fitted onto the central shaft (43) and can rotate around the central shaft (43), and the two ends of the central shaft (43) are fixedly connected to the support frame (1); The outer rubber layer (42) extends outward at both ends to form a sealing section (44), and the inner cavity of the sealing section (44) is a gradually expanding conical surface (45); The support frame (1) is provided with a sealing groove (46) corresponding to the sealing section (44). The diameter of the sealing groove (46) is larger than the outer diameter of the sealing section (44) and forms a clearance fit with it. A sealing cone (47) adapted to the conical surface (45) is provided in the sealing groove (46). The sealing cone (47) is interference-fitted with the conical surface (45). The rotational sealing between the inner and outer walls of the sealing section (44) and the sealing cone (47) and the sealing groove (46) is achieved by the elastic deformation and expansion of the sealing section (44).

4. An adjustable hydraulic engineering gate according to claim 1, characterized in that, A cleaning brush (5) is provided directly below the sealing assembly (4).

5. An adjustable hydraulic engineering gate according to claim 1, characterized in that, When the second gate (3) is in its lowest position, the sealing assembly (4) is close to the top surface of the second gate (3).

6. An adjustable hydraulic engineering gate according to claim 1, characterized in that, The upper and lower end faces of the first gate (2) and the second gate (3) are both arc surfaces.

7. An adjustable hydraulic engineering gate according to claim 1, characterized in that, Limiting blocks are provided in the sliding grooves of the support frame (1) and the first gate (2) and the second gate (3). The limiting blocks restrict the vertical movement range of the first gate (2) and the second gate (3) to prevent them from detaching from the sealing assembly (4) during movement.

Images