Hydraulic system of floodgate and working method thereof

Abstract

The application discloses a kind of flood sluices gate hydraulic system, by inverted oil cylinder, plunger cylinder, gate, lower steel frame, upper lifting beam, platform locking block and lower locking block composition;The gate is connected with upper lifting beam by inverted oil cylinder;The upper lifting beam is set on lower steel frame;The lower steel frame is set on dam by plunger cylinder;The platform locking block is set on dam, and the recess matched with platform locking block is set on gate;The lower steel frame is provided with lower locking block, and the recess matched with lower locking block is set on gate.The flood sluices gate hydraulic system controls flood sluices gate operating gate without building high bent frame on dam top, improves the anti-seismic capacity of dam;The gate is controlled by pressure pump, effectively suppresses flow-induced vibration;Hydraulic system construction cycle is short, and the installation, maintenance and replacement of equipment are relatively convenient.

Description

Technical Field

[0001] This invention relates to the field of hydropower flood discharge engineering, and in particular to the hydraulic system and working method of flood discharge gate. Background Technology

[0002] Fixed winch-type gate hoists, as traditional gate equipment, are widely used in large-orifice exposed floodgates in flood discharge systems. However, some problems exist in their operation. For example, a tall frame needs to be built on the dam top, and a large winch is placed on the frame. The seismic resistance of the entire frame is a prominent issue. For floodgates that are open for long-term discharge, the winch cannot effectively suppress vibration, resulting in prominent flow-induced vibration problems and high operational risks. Furthermore, the construction period of the frame is long, and the installation, maintenance, and replacement of equipment are all difficult. Summary of the Invention

[0003] To address the aforementioned problems, a first aspect of the present invention provides a hydraulic system for a flood discharge gate, comprising an inverted hydraulic cylinder, a plunger hydraulic cylinder, a gate, a lower steel frame, an upper lifting beam, a platform locking block, and a lower locking block; the gate is connected to the upper lifting beam via the inverted hydraulic cylinder; the upper lifting beam is mounted on the lower steel frame; the lower steel frame is mounted on the dam via the plunger hydraulic cylinder; the platform locking block is mounted on the dam, and the gate has a groove that mates with the platform locking block; the lower steel frame has a lower locking block, and the gate has a groove that mates with the lower locking block.

[0004] Furthermore, the upper lifting beam is equipped with an inverted hydraulic pump station; and the dam is equipped with a plunger hydraulic pump station.

[0005] Furthermore, the plunger hydraulic pump station comprises a plunger cylinder oil tank, a plunger cylinder pressurizing pump, a first solenoid ball valve, a second solenoid ball valve, a third solenoid ball valve, and a plunger cylinder speed regulating valve. The plunger cylinder pressurizing pump is installed at the oil outlet of the plunger cylinder oil tank. The oil outlet of the plunger cylinder pressurizing pump is connected to one end of the second and third solenoid ball valves via the first solenoid ball valve. The other end of the second solenoid ball valve is connected to the plunger cylinder, and the other end of the third solenoid ball valve is connected to the plunger cylinder oil tank. A plunger speed regulating valve is installed between the second solenoid ball valve and the plunger cylinder. The inverted hydraulic pump station comprises an inverted cylinder oil tank, an inverted cylinder pressurizing pump, a fourth solenoid ball valve, a fifth solenoid ball valve, and a sixth solenoid ball valve. The system comprises an electromagnetic ball valve, a seventh electromagnetic ball valve, an eighth electromagnetic ball valve, and a speed control valve for the inverted cylinder. An inverted cylinder pressurizing pump is installed at the oil outlet of the inverted cylinder oil tank. The oil outlet of the inverted cylinder pressurizing pump is connected to one end of the fifth and sixth electromagnetic ball valves via the fourth electromagnetic ball valve. The other end of the fifth electromagnetic ball valve is connected to the inverted cylinder oil tank. The other end of the sixth electromagnetic ball valve is connected to the first cylinder of the inverted cylinder. The oil outlet of the inverted cylinder pressurizing pump is connected to the second cylinder of the inverted cylinder via the seventh and eighth electromagnetic ball valves. The other end of the eighth electromagnetic ball valve is connected to the inverted cylinder oil tank. An inverted cylinder speed control valve is installed between the sixth electromagnetic ball valve and the first cylinder of the inverted cylinder.

[0006] According to another aspect of the present invention, a method for operating a hydraulic system for a flood discharge gate includes the following steps: when the gate lifting height is less than the working stroke of the inverted cylinder, the gate is opened and closed by the inverted cylinder; when the gate lifting height is greater than the working stroke of the inverted cylinder and less than the sum of the working strokes of the inverted cylinder and the plunger cylinder, the gate is opened and closed by the plunger cylinder; when the gate lifting height is greater than the sum of the working strokes of the inverted cylinder and the plunger cylinder, after the inverted cylinder and the plunger cylinder reach their maximum working strokes, the platform locking block on the dam moves to the locking position, the plunger cylinder and the gate fall down, after the platform locking block locks the gate, the plunger cylinder and the lower steel frame continue to fall to the lowest point, the lower locking block moves to the locking position, the plunger cylinder moves upward, after the lower locking block pushes against the gate, the platform locking block returns to the unlocking position, and the plunger cylinder can continue to control the lifting and lowering of the gate.

[0007] Furthermore, the inverted cylinder controls the opening and closing of the gate; when the gate is open, the inverted cylinder pressurization pump starts and opens the fourth and sixth electromagnetic ball valves. The pressurized oil enters the first cylinder of the inverted cylinder after being regulated by the inverted cylinder speed regulating valve. At the same time, the eighth electromagnetic ball valve is opened, and the pressurized oil in the second cylinder of the inverted cylinder flows back to the inverted cylinder oil tank through the eighth electromagnetic ball valve. The inverted cylinder pulls the gate to open; when the gate is closed, the seventh electromagnetic ball valve is opened, and the pressurized oil is forced into the second cylinder of the inverted cylinder. At the same time, the sixth and fifth electromagnetic ball valves are opened, and the pressurized oil in the first cylinder of the inverted cylinder flows back to the inverted cylinder oil tank after being regulated by the inverted speed regulating valve.

[0008] Furthermore, the plunger cylinder controls the opening and closing of the gate. When the gate is open, the plunger cylinder pressurization pump starts and opens the first and second solenoid ball valves. The pressurized oil enters the plunger cylinder after being regulated by the plunger cylinder speed control valve, and the plunger cylinder pushes the gate open. When the gate is closed, the second and third solenoid ball valves are opened, and the pressurized oil in the plunger cylinder flows back to the plunger cylinder oil tank after being regulated by the plunger cylinder speed control valve.

[0009] Furthermore, both ends of the plunger cylinder speed control valve are connected to the plunger cylinder manual speed control valve, and both ends of the inverted cylinder speed control valve are connected to the inverted cylinder manual speed control valve; when the plunger cylinder speed control valve malfunctions, it can be adjusted through the plunger cylinder manual speed control valve; when the inverted cylinder speed control valve malfunctions, it can be adjusted through the inverted cylinder manual speed control valve.

[0010] The above-mentioned technical solution of the invention has the following beneficial technical effects: controlling the working gate of the flood discharge gate through the hydraulic system eliminates the need to build a tall frame on the top of the dam, thus improving the seismic resistance of the dam; controlling the gate through a pressure pump effectively suppresses flow-induced vibration; the hydraulic system has a short construction cycle, and the installation, maintenance and replacement of the equipment are relatively convenient. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the hydraulic system of the flood discharge gate; Figure 2 This is a schematic diagram of the piston hydraulic pump station of the flood discharge gate hydraulic system; Figure 3 This is a schematic diagram of the inverted hydraulic pump station of the flood discharge gate hydraulic system; Figure 4 This is a schematic diagram of the hydraulic system of the flood discharge gate with the gate at the bottom. Figure 5 This is a schematic diagram of the hydraulic system of the flood discharge gate after the gate is lifted by the inverted cylinder; Figure 6 This is a schematic diagram of the structure of the hydraulic system of the flood discharge gate after the piston cylinder lifts the gate. Figure 7This is a schematic diagram of the structure of the hydraulic system platform locking block of the flood discharge gate after it is locked. Figure 8 This is a schematic diagram of the lower steel frame of the floodgate hydraulic system after it has been lowered. Figure 9 This is a schematic diagram of the structure of the hydraulic system of the flood discharge gate after the lower locking block of the gate is engaged and the platform locking block is unlocked. Figure 10 This is a schematic diagram of the hydraulic system of the flood discharge gate, showing the gate rising to its highest position.

[0012] Figure label: 1: Inverted cylinder; 2: Plunger cylinder; 3: Gate; 4: Lower steel frame; 5: Upper lifting beam; 6: Platform locking block; 7: Lower locking block; 8: Inverted hydraulic pump station; 9: Plunger cylinder oil tank; 10: Plunger cylinder pressurizing pump; 11: First solenoid ball valve; 12: Second solenoid ball valve; 13: Third solenoid ball valve; 14: Plunger cylinder speed control valve; 15: Inverted cylinder oil tank; 16: Inverted cylinder pressurizing pump; 17: Fourth solenoid ball valve; 18: Fifth solenoid ball valve; 19: Sixth solenoid ball valve; 20: Seventh solenoid ball valve; 21: Eighth solenoid ball valve; 22: Inverted cylinder speed control valve. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0014] like Figure 1 As shown, a hydraulic system for a flood discharge gate is provided, comprising an inverted cylinder 1, a plunger cylinder 2, a gate 3, a lower steel frame 4, an upper lifting beam 5, a platform locking block 6, and a lower locking block 7. The gate 2 is connected to the upper lifting beam 5 via the inverted cylinder 1. The upper lifting beam 5 is mounted on the lower steel frame 4. The lower steel frame 4 is mounted on the dam via the plunger cylinder 2. The platform locking block 6 is mounted on the dam, and the gate 3 has a groove that mates with the platform locking block 6. The lower steel frame 4 has the lower locking block 7, and the gate 2 has a groove that mates with the lower locking block 7.

[0015] The upper lifting beam 5 is equipped with an inverted hydraulic pump station 8; the dam is equipped with a plunger hydraulic pump station.

[0016] like Figure 2 and Figure 3As shown, the plunger hydraulic pump station consists of a plunger cylinder oil tank 9, a plunger cylinder pressurizing pump 10, a first solenoid ball valve 11, a second solenoid ball valve 12, a third solenoid ball valve 13, and a plunger cylinder speed regulating valve 14. The plunger cylinder pressurizing pump is installed at the oil outlet of the plunger cylinder oil tank. The oil outlet of the plunger cylinder pressurizing pump is connected to one end of the second and third solenoid ball valves via the first solenoid ball valve. The other end of the second solenoid ball valve is connected to the plunger cylinder, and the other end of the third solenoid ball valve is connected to the plunger cylinder oil tank. A plunger speed regulating valve is installed between the second solenoid ball valve and the plunger cylinder. The inverted hydraulic pump station consists of an inverted cylinder oil tank 15, an inverted cylinder pressurizing pump 16, a fourth solenoid ball valve 17, and a fifth solenoid ball valve 18. The system comprises a sixth electromagnetic ball valve 19, a seventh electromagnetic ball valve 20, an eighth electromagnetic ball valve 21, and a reverse cylinder speed control valve 22. An reverse cylinder pressurizing pump is installed at the oil outlet of the reverse cylinder oil tank. The oil outlet of the reverse cylinder pressurizing pump is connected to one end of the fifth and sixth electromagnetic ball valves via a fourth electromagnetic ball valve. The other end of the fifth electromagnetic ball valve is connected to the reverse cylinder oil tank. The other end of the sixth electromagnetic ball valve is connected to the first cylinder of the reverse cylinder. The oil outlet of the reverse cylinder pressurizing pump is connected to the second cylinder of the reverse cylinder via one end of the seventh and eighth electromagnetic ball valves. The other end of the eighth electromagnetic ball valve is connected to the reverse cylinder oil tank. A reverse cylinder speed control valve is installed between the sixth electromagnetic ball valve and the first cylinder of the reverse cylinder.

[0017] According to another aspect of the present invention, a method for operating a hydraulic system for a flood discharge gate includes the following steps: when the gate lifting height is less than the working stroke of the inverted cylinder, the opening and closing of the gate is controlled by the inverted cylinder. Figure 4 Status to Figure 5 Status: When the gate lifting height is greater than the working stroke of the inverted cylinder but less than the sum of the working strokes of the inverted cylinder and the plunger cylinder, the opening and closing of the gate is controlled by the plunger cylinder. Figure 5 Status to Figure 6 Status: When the gate lifting height exceeds the sum of the working strokes of the inverted cylinder and the plunger cylinder, after the inverted cylinder and the plunger cylinder reach their maximum working strokes, the platform locking block on the dam moves to the locking position, as shown. Figure 7 As shown, after the plunger cylinder and gate descend, and the platform locking block locks the gate, the plunger cylinder and lower steel frame continue to descend to their lowest point. Figure 8 As shown, the lower locking block moves to the locked position, the plunger cylinder moves upward, the lower locking block presses against the gate, and the platform locking block returns to the unlocked position. Figure 9 As shown, the plunger cylinder can continue to control the raising and lowering of the gate. Figure 10 The image shows the gate raised to its highest position.

[0018] The inverted cylinder controls the opening and closing of the gate. When the gate is open, the inverted cylinder pressurization pump starts and opens the fourth and sixth solenoid ball valves. The pressurized oil enters the first cylinder of the inverted cylinder after being regulated by the inverted cylinder speed control valve. At the same time, the eighth solenoid ball valve is opened, and the pressurized oil in the second cylinder of the inverted cylinder flows back to the inverted cylinder oil tank through the eighth solenoid ball valve. The inverted cylinder pulls the gate to open. When the gate is closed, the seventh solenoid ball valve is opened, and the pressurized oil is forced into the second cylinder of the inverted cylinder. At the same time, the sixth and fifth solenoid ball valves are opened, and the pressurized oil in the first cylinder of the inverted cylinder flows back to the inverted cylinder oil tank after being regulated by the inverted speed control valve.

[0019] The plunger cylinder controls the opening and closing of the gate. When the gate is open, the plunger cylinder pressurization pump starts and opens the first and second solenoid ball valves. The pressurized oil enters the plunger cylinder after being regulated by the plunger cylinder speed control valve, and the plunger cylinder pushes the gate open. When the gate is closed, the second and third solenoid ball valves are opened, and the pressurized oil in the plunger cylinder flows back to the plunger cylinder oil tank after being regulated by the plunger cylinder speed control valve.

[0020] Both ends of the plunger cylinder speed control valve are connected to the plunger cylinder manual speed control valve, and both ends of the inverted cylinder speed control valve are connected to the inverted cylinder manual speed control valve; when the plunger cylinder speed control valve malfunctions, it can be adjusted through the plunger cylinder manual speed control valve; when the inverted cylinder speed control valve malfunctions, it can be adjusted through the inverted cylinder manual speed control valve.

[0021] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A hydraulic system for a flood discharge gate, characterized in that, It consists of an inverted hydraulic cylinder, a plunger hydraulic cylinder, a gate, a lower steel frame, an upper lifting beam, a platform locking block, and a lower locking block. The gate is connected to the upper lifting beam via the inverted hydraulic cylinder. The upper lifting beam is mounted on the lower steel frame. The lower steel frame is mounted on the dam via the plunger hydraulic cylinder. The platform locking block is mounted on the dam, and the gate has a groove that mates with the platform locking block. The lower steel frame has a lower locking block, and the gate has a groove that mates with the lower locking block.

2. The hydraulic system for the flood discharge gate according to claim 1, characterized in that, The upper lifting beam is equipped with an inverted hydraulic pump station; the dam is equipped with a plunger hydraulic pump station.

3. The hydraulic system for the flood discharge gate according to claim 2, characterized in that, The plunger hydraulic pump station comprises a plunger cylinder oil tank, a plunger cylinder pressurizing pump, a first solenoid ball valve, a second solenoid ball valve, a third solenoid ball valve, and a plunger cylinder speed regulating valve. The plunger cylinder pressurizing pump is installed at the oil outlet of the plunger cylinder oil tank. The oil outlet of the plunger cylinder pressurizing pump is connected to one end of the second and third solenoid ball valves via the first solenoid ball valve. The other end of the second solenoid ball valve is connected to the plunger cylinder, and the other end of the third solenoid ball valve is connected to the plunger cylinder oil tank. A plunger speed regulating valve is installed between the second solenoid ball valve and the plunger cylinder. The inverted hydraulic pump station comprises an inverted cylinder oil tank, an inverted cylinder pressurizing pump, a fourth solenoid ball valve, a fifth solenoid ball valve, and a sixth solenoid ball valve. The system comprises a valve, a seventh solenoid ball valve, an eighth solenoid ball valve, and a speed control valve for the inverted cylinder. An inverted cylinder pressurizing pump is installed at the oil outlet of the inverted cylinder oil tank. The oil outlet of the inverted cylinder pressurizing pump is connected to one end of the fifth and sixth solenoid ball valves via the fourth solenoid ball valve. The other end of the fifth solenoid ball valve is connected to the inverted cylinder oil tank. The other end of the sixth solenoid ball valve is connected to the first cylinder of the inverted cylinder. The oil outlet of the inverted cylinder pressurizing pump is connected to the second cylinder of the inverted cylinder via the seventh and eighth solenoid ball valves. The other end of the eighth solenoid ball valve is connected to the inverted cylinder oil tank. An inverted cylinder speed control valve is installed between the sixth solenoid ball valve and the first cylinder of the inverted cylinder.

4. The working method of the hydraulic system of the flood discharge gate based on the hydraulic system of the flood discharge gate according to claim 3, characterized in that, Includes the following steps: When the gate lifting height is less than the working stroke of the inverted cylinder, the gate is opened and closed by the inverted cylinder. When the gate lifting height is greater than the working stroke of the inverted cylinder but less than the sum of the working strokes of the inverted cylinder and the plunger cylinder, the gate is opened and closed by the plunger cylinder. When the gate lifting height is greater than the sum of the working strokes of the inverted cylinder and the plunger cylinder, after the inverted cylinder and the plunger cylinder reach their maximum working strokes, the platform locking block on the dam moves to the locking position, the plunger cylinder and the gate fall down, the platform locking block locks the gate, the plunger cylinder and the lower steel frame continue to fall to the lowest point, the lower locking block moves to the locking position, the plunger cylinder moves upward, the lower locking block pushes against the gate, the platform locking block returns to the unlocking position, and the plunger cylinder can continue to control the raising and lowering of the gate.

5. The working method of the hydraulic system for the flood discharge gate according to claim 4, characterized in that, The inverted cylinder controls the opening and closing of the gate. When the gate is open, the inverted cylinder pressurization pump starts and opens the fourth and sixth solenoid ball valves. The pressurized oil enters the first cylinder of the inverted cylinder after being regulated by the inverted cylinder speed control valve. At the same time, the eighth solenoid ball valve is opened, and the pressurized oil in the second cylinder of the inverted cylinder flows back to the inverted cylinder oil tank through the eighth solenoid ball valve. The inverted cylinder pulls the gate to open. When the gate is closed, the seventh solenoid ball valve is opened, and the pressurized oil is forced into the second cylinder of the inverted cylinder. At the same time, the sixth and fifth solenoid ball valves are opened, and the pressurized oil in the first cylinder of the inverted cylinder flows back to the inverted cylinder oil tank after being regulated by the inverted speed control valve.

6. The working method of the hydraulic system of the flood discharge gate according to claim 4, wherein the plunger cylinder controls the opening and closing of the gate, when the gate is opened, the plunger cylinder pressurization pump starts and opens the first electromagnetic ball valve and the second electromagnetic ball valve, and the pressurized oil enters the plunger cylinder after being regulated by the plunger cylinder speed regulating valve, and the plunger cylinder pushes the gate to open; when the gate is closed, the second electromagnetic ball valve and the third electromagnetic ball valve are opened, and the pressurized oil in the plunger cylinder flows back to the plunger cylinder oil tank after being regulated by the plunger cylinder speed regulating valve.

7. The working method of the hydraulic system of the flood discharge gate according to claim 4, wherein the two ends of the piston cylinder speed regulating valve are connected to the piston cylinder manual speed regulating valve, and the two ends of the inverted cylinder speed regulating valve are connected to the inverted cylinder manual speed regulating valve; when the piston cylinder speed regulating valve malfunctions, it can be adjusted by the piston cylinder manual speed regulating valve; when the inverted cylinder speed regulating valve malfunctions, it can be adjusted by the inverted cylinder manual speed regulating valve.

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