Hydraulic structure, gate valve type quick gate and hoist arrangement structure

Abstract

The utility model belongs to the technical field of hydropower engineering, and discloses a hydraulic structure, a gate valve type quick gate and a hoist arrangement structure. Comprising a surge shaft, a gate chamber, a lower platform, a gate groove, a hydraulic hoist oil cylinder assembly, a top platform, a dam crest portal crane, a manhole, an inflation and deflation valve device, an oil cylinder piston rod, a hanger shaft, a gate top water filling valve device, a knuckle bearing and a gate groove top frame. And a water conveying flow channel is arranged at the bottom of the impedance hole connecting pipe. Metal structure equipment of the gate shaft and the gate chamber and the surge shaft are separately and independently arranged, the rapid gate is arranged in a gate valve mode, the gate is directly connected with an oil cylinder of the hydraulic hoist, and reverse water attack of a flow channel is rapidly diffused into the surge shaft on the upstream of the gate during operation. The influence of water hammer waves, surges and the like of the surge shaft on gate parking can be effectively reduced, and the operation safety of a rapid gate of a unit is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydropower engineering, in particular to a hydraulic structure, a gate valve type fast gate and a hoist arrangement structure. Background Art

[0002] In conventional hydropower stations, gates are often set in surge wells due to anti-flyaway requirements and terrain conditions. However, this layout makes the gates vulnerable to the adverse effects of surge waves in the surge well when parked or lowered, and even causes safety accidents. At present, although some measures have been taken to enhance the stability of the gates, such as increasing the water column on the top of the gate and setting locking devices, these methods are still difficult to completely eliminate the risks brought by surge waves. In particular, when the gates are placed in a higher position to prevent floating, although the impact of surge waves can be reduced, in an emergency, it may endanger the safety of the unit because it cannot be closed quickly. Another method is to suspend the fast gates at a lower position. Although the closing time is shortened, the pull rod device that has been immersed for a long time is prone to rust and difficult to maintain. In addition, the humid environment also has an adverse effect on mechanical and electrical equipment.

[0003] In summary, although some technologies have been attempted to solve the safety problem of gates in surge tanks, the existing technologies still need to be improved to ensure that hydropower station gates can operate stably and reliably in complex environments. Utility Model Content

[0004] The utility model aims to provide a hydraulic structure and a gate valve type fast gate and a hoist arrangement structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic structure and a gate-valve type fast gate and hoist arrangement structure, including a pressure regulating well, a gate chamber, a lower platform, a gate slot, a hydraulic hoist cylinder assembly, a top platform, a dam top door machine, an entry hole and an air filling and exhaust valve device, a cylinder piston rod, a hanging shaft, a gate top water filling valve device, a joint bearing, and a gate slot top frame. The bottom of the pressure regulating well is provided with an impedance hole connecting pipe, and the bottom of the impedance hole connecting pipe is provided with a water delivery channel. The lower part of the gate chamber downstream of the pressure regulating well is provided with a gate well; the bottom of the lower platform is provided with a waist box area at the top of the gate slot, and a fast Gate, when the rapid gate is lifted, the rapid gate is located in the waist box area at the top of the gate slot, and when the rapid gate falls, it is located in the lower part of the waist box area at the top of the gate slot; a vent is provided downstream of the gate shaft, and a vent steel grating protective cover is provided at the vent outlet of the top platform, and a cylinder inspection platform is provided on the vertical downstream side wall of the gate chamber, and a cylinder tail support rod, an inspection channel and a guardrail are provided at the tail of the hydraulic opening and closing machine cylinder assembly, and the ends of the cylinder tail support rod, the inspection channel and the guardrail are supported on the downstream side wall of the gate chamber, and a gate top track is provided on the top of the top platform.

[0006] Preferably, a top sealing cover plate is provided at the bottom of the hydraulic hoist cylinder assembly, the cylinder piston rod passes through the top sealing cover plate above the water body in the gate well and the waist box area at the top of the gate groove, the bottom of the cylinder piston rod is connected with a hanging head, and the hanging head is connected to the gate top water filling valve device through a hanging shaft and a spherical bearing, a hydraulic pump station pump room is provided on the top of the top platform, a hydraulic pump station is provided inside the hydraulic pump station pump room, and the hydraulic pump station is connected to the hydraulic hoist cylinder assembly through a hydraulic oil pipeline.

[0007] Preferably, the upper part of the door slot top frame and the lower part of the top sealing cover plate are connected by flanges and fasteners, the door slot top frame is embedded with large second-phase concrete and is connected with second-phase dowel bars, and the second-phase dowel bars are welded to the door slot top frame through the vertical stiffener plate of the top frame.

[0008] Preferably, two waterproof sealing rings are arranged between the top sealing cover plate and the top frame of the door slot, connecting bolts are movably installed between the top sealing cover plate and the top frame of the door slot, and connecting nuts are movably installed at the bottom of the connecting bolts.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The utility model arranges the metal structure equipment of the gate well and gate chamber separately from the pressure regulating well, and the rapid gate adopts a gate valve arrangement. The gate and the hydraulic hoist cylinder are directly connected. During operation, the reverse water hammer of the flow channel quickly diffuses into the pressure regulating well upstream of the gate, which can effectively reduce the influence of water hammer waves and surges in the pressure regulating well on the parking of the gate, and improve the safety of the operation of the unit's rapid gate.

[0011] 2. The utility model optimizes the connection between the gate and the hoist through the long pull rod device, which greatly increases the safety and reliability. At the same time, the pull rod device and connecting pin shaft in the prior art are immersed in water for a long time, and the parts are easy to rust. In addition, it is very cumbersome to disassemble and lift them section by section during inspection and maintenance, and the inspection and maintenance time is long.

[0012] 3. The utility model improves the reliability of the equipment through this device, and at the same time improves the inspection and maintenance conditions of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a longitudinal section schematic diagram of the arrangement structure of the hydraulic structure and the gate valve type fast gate and its hoist of the utility model;

[0014] Figure 2 It is a longitudinal section diagram of the arrangement structure of the utility model fast gate when it is in the state of closing the orifice;

[0015] Figure 3 For this utility model Figure 1 AA section view;

[0016] Figure 4 It is an enlarged schematic diagram of the layout structure of the gate and its hoist of the utility model;

[0017] Figure 5 It is a partially enlarged schematic diagram of view B of the utility model.

[0018] In the figure: 1. Surge well; 2. Gate chamber; 3. Impedance hole connecting pipe; 4. Lower platform; 5. Gate well; 6. Gate slot; 7. Water delivery channel; 8. Fast gate; 9. Waist box area at the top of the gate slot; 10. Top frame of the gate slot; 11. Top sealing cover plate; 12. Hydraulic hoist cylinder assembly; 13. Cylinder tail support rod and maintenance channel and guardrail; 14. Ventilation hole; 15. Top platform; 16. Dam top gantry; 17. Ventilation hole Steel grating protective cover; 18. Oil cylinder maintenance platform; 19. Hydraulic pump station pump room; 20. Hydraulic pump station; 21. Gate top track; 22. Manhole and filling and exhaust valve device; 23. Cylinder piston rod; 24. Lifting head; 25. Lifting shaft; 26. Spherical bearing; 27. Gate top water filling valve device; 28. Top frame vertical stiffener; 29. ​​Second phase inserted reinforcement; 30. Connecting bolts; 31. Anti-loosening washers; 32. Connecting nuts; 33. Sealing rings. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figures 1 to 5 As shown, the embodiment of the utility model provides a hydraulic structure and a gate-valve type fast gate and hoist arrangement structure, including a pressure regulating well 1, a gate chamber 2, a lower platform 4, a gate slot 6, a hydraulic hoist cylinder assembly 12, a top platform 15, a dam top gate machine 16, an entry hole and an air filling and exhaust valve device 22, a cylinder piston rod 23, a hanging shaft 25, a gate top water filling valve device 27, a joint bearing 26, and a gate slot top frame 10. The bottom of the pressure regulating well 1 is provided with an impedance hole connecting pipe 3, and the bottom of the impedance hole connecting pipe 3 is provided with a water delivery channel 7. The lower part of the gate chamber 2 downstream of the pressure regulating well 1 is arranged with a gate well 5; the bottom of the lower platform 4 is provided with a gate slot top waist box area 9, and is also provided with a fast Gate 8, when the rapid gate 8 is lifted, the rapid gate 8 is located in the waist box area 9 at the top of the gate groove, and when the rapid gate 8 falls, it is located at the lower part of the waist box area 9 at the top of the gate groove; a vent 14 is provided downstream of the gate shaft 5, and a vent steel grating protective cover plate 17 is provided at the vent outlet of the top platform 15, and a cylinder maintenance platform 18 is provided on the vertical downstream side wall of the gate chamber 2, and a cylinder tail support rod, an inspection channel and a guardrail 13 are provided at the tail of the hydraulic opening and closing machine cylinder assembly 12, and the ends of the cylinder tail support rod, the inspection channel and the guardrail 13 are supported on the downstream side wall of the gate chamber 2, and a gate top track 21 is provided on the top of the top platform 15.

[0021] When the unit is generating electricity normally, the water delivery channel 7 is flowing and the fast gate 8 is in the fully open position (see Figure 1 ), when the fast gate is in the fully open position, the bottom edge is about 1m higher than the fast gate opening. When an accident occurs in the unit, the fast gate 8 can quickly close the fast gate opening under the operation of the hydraulic hoist (see Figure 2 ), cut off the water flow to protect the unit safety. The purpose of setting the vent 14 downstream of the gate well 5 close to the fast gate is to ensure that during operation, it is used to exhaust when the flow channel is filled with water and to replenish air when the flow channel is drained. The vent steel grille protective cover plate is set at the vent outlet of the top platform to ensure the safety of operation during replenishment and exhaust.

[0022] Among them, a top sealing cover plate 11 is provided at the bottom of the hydraulic hoist cylinder assembly 12, and the cylinder piston rod 23 passes through the top sealing cover plate 11 above the water body in the gate well 5 and the waist box area 9 at the top of the gate groove. A hanging head 24 is connected to the bottom of the cylinder piston rod 23, and the hanging head 24 is connected to the gate top water filling valve device 27 through a hanging shaft 25 and a joint bearing 26. A hydraulic pump station pump room 19 is provided on the top of the top platform 15, and a hydraulic pump station 20 is provided inside the hydraulic pump station pump room 19. The hydraulic pump station 20 is connected to the hydraulic hoist cylinder assembly 12 through a hydraulic oil pipeline.

[0023] Among them, the upper part of the door slot top frame 10 and the lower part of the top sealing cover plate 11 are connected by flanges and fasteners, and the door slot top frame 10 is connected with the second phase embedded second phase dowel 29, and the second phase dowel 29 is welded with the door slot top frame 10 with the top frame vertical stiffening plate 28. The second phase dowel 29 is connected to the civil structure reinforced concrete, and the second phase dowel 29 is welded with the vertical stiffening plate 28 of the door slot top frame 10 by on-site double-sided welds. Therefore, the internal water pressure acting on the top sealing cover plate is transmitted to the civil structure reinforced concrete foundation through the top sealing cover plate, fasteners, the door slot top frame and its vertical stiffening plate, double-sided welds and the second phase connection force dowel, and the force transmission path is clear, simple and reliable.

[0024] When the power station unit is generating electricity, the flow channel flows, and there is water in the flow channel and the surge tank. During the operation of the unit, the water level in the surge tank changes between the highest surge level and the lowest surge level. For the direction of the "power generation water flow" in the flow channel, please refer to the attached Figure 1 The pressure regulating well and the flow channel as well as the waist box area 9 at the top of the gate slot are connected. The utility model seals the water in the area formed by the lower gate slot waist box, the pressure regulating well and the flow channel through the connection between the gate slot top frame 10 and the top sealing cover plate 11, preventing water from entering the gate chamber and affecting the upper mechanical equipment and electrical equipment, and shortening the connection distance between the oil cylinder assembly and the gate, reducing the connection links, and ensuring a safe and reliable connection.

[0025] Among them, a waterproof sealing ring 33 is arranged between the top sealing cover plate 11 and the top frame 10 of the door slot, a connecting bolt 30 is movably installed between the top sealing cover plate 11 and the top frame 10 of the door slot, and a connecting nut 32 is movably installed at the bottom of the connecting bolt 30; the fastening surface of the bolt 30 and the fastening surface of the nut 32 are respectively provided with an anti-loosening washer 31. When the unit is operated under different load conditions, the water level in the pressure regulating well is constantly changing, and the water pressure acts on the top sealing cover plate 11 through the above-mentioned connecting area, which causes the force on the fasteners used to connect the top frame of the door slot and the top sealing cover plate to change, which is easy to cause it to loosen, so an anti-loosening washer is used here. Due to the limited layout position and the size limitation of the standard elastic washer, and considering the importance of water sealing in this part, the utility model innovatively selects an anti-loosening washer 31 combined with large-size bolts 30 and nuts 32 for the anti-loosening connection between the top sealing cover plate 11 and the top frame 10 of the door slot. This type of anti-loosening washer 31 uses the mechanical structure of the wedge-shaped tooth surface to increase the pre-tightening force to prevent the bolt from loosening, rather than relying on increasing friction. It is composed of a pair of tooth surface washers that mesh with each other, one side is a wedge-shaped tooth surface, and the other side is radial fine teeth. Since the designed wedge angle is larger than the thread lead angle, the wedge locking effect can prevent the fastener from rotating and loosening. The use of this type of anti-loosening washer effectively reduces the large installation space required for double nut anti-loosening, and at the same time uses the anti-loosening principle of the washer to ensure reliable connection of components. This type of anti-loosening washer is used in the field of hydropower engineering for the first time. The sealing device between the top sealing cover plate 11 and the top frame 10 of the door slot adopts the method of opening two U-shaped ring grooves on the upper flange of the top frame 10 of the door slot and installing two annular sealing rings 33 to ensure reliable sealing and good water sealing effect.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic structure and a gate-valve type fast gate and hoist arrangement structure, comprising a pressure regulating well (1), a gate chamber (2), a lower platform (4), a gate slot (6), a hydraulic hoist cylinder assembly (12), a top platform (15), a dam top gate machine (16), an entry hole and an air filling and exhaust valve device (22), a cylinder piston rod (23), a hanging shaft (25), a gate top water filling valve device (27), a spherical bearing (26), and a gate slot top frame (10), characterized in that: The bottom of the pressure regulating well (1) is provided with an impedance hole connecting pipe (3), the bottom of the impedance hole connecting pipe (3) is provided with a water conveying channel (7), and the lower part of the gate chamber (2) downstream of the pressure regulating well (1) is arranged with a gate well (5); the bottom of the lower platform (4) is provided with a waist box area (9) at the top of the gate slot, and a fast gate (8) is also provided. When the fast gate (8) is lifted, the fast gate (8) is located in the area of ​​the waist box area (9) at the top of the gate slot, and when the fast gate (8) falls, it is located at the bottom of the waist box area (9) at the top of the gate slot; A vent (14) is provided downstream of the gate shaft (5), a vent steel grille protective cover plate (17) is provided at the vent outlet of the top platform (15), a cylinder inspection platform (18) is provided on the vertical downstream side wall of the gate chamber (2), a cylinder tail support rod, an inspection channel and a guardrail (13) are provided at the tail of the hydraulic hoist cylinder assembly (12), the ends of the cylinder tail support rod, the inspection channel and the guardrail (13) are supported on the downstream side wall of the gate chamber (2), and a gate top track (21) is provided on the top of the top platform (15).

2. A hydraulic structure and gate valve type fast gate and hoist arrangement structure according to claim 1, characterized in that: A top sealing cover plate (11) is provided at the bottom of the hydraulic hoist cylinder assembly (12); the cylinder piston rod (23) passes through the top sealing cover plate (11) above the water body in the gate well (5) and the waist box area (9) at the top of the gate groove; a hanging head (24) is connected to the bottom of the cylinder piston rod (23); and the hanging head (24) is connected to the gate top water filling valve device (27) through a hanging shaft (25) and a spherical bearing (26); a hydraulic pump station pump room (19) is provided at the top of the top platform (15); a hydraulic pump station (20) is provided inside the hydraulic pump station pump room (19); and the hydraulic pump station (20) is connected to the hydraulic hoist cylinder assembly (12) through a hydraulic oil pipeline.

3. A hydraulic structure and gate valve type fast gate and hoist arrangement structure according to claim 1, characterized in that: The upper portion of the door slot top frame (10) and the lower portion of the top sealing cover plate (11) are connected via flanges and fasteners. The door slot top frame (10) is embedded in large-size second-phase concrete. The door slot top frame (10) is connected with second-phase dowel bars (29). The second-phase dowel bars (29) are welded to the door slot top frame (10) via a top frame vertical stiffener plate (28).

4. A hydraulic structure and gate valve type fast gate and hoist arrangement structure according to claim 2, characterized in that: A sealing ring (33) is provided between the top sealing cover plate (11) and the door slot top frame (10), a connecting bolt (30) is movably installed between the top sealing cover plate (11) and the door slot top frame (10), and a connecting nut (32) is movably installed at the bottom of the connecting bolt (30).

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