A water filling valve device with counter-impact energy dissipation and shock absorption functions

Abstract

The present invention discloses a water filling valve device with counteracting, energy dissipation, and shock absorption functions. The water filling valve device is arranged obliquely and symmetrically on the top section of the gate, with the angle α between the centerline of the water filling valve device and the centerline of the gate slot ranging from 30° to 60°. This oblique and symmetrical arrangement of the water filling valve device on the top section of the gate changes the direction of the water flow at the valve pipe outlet. The left and right water flows counteract each other, dissipating energy and preventing damage caused by high-pressure, high-speed water flow to downstream civil structures or the downstream gate.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to a water filling valve device with hedging, energy dissipation and shock absorption functions. Background Art

[0002] In water conservancy and hydropower projects, to simplify hydraulic structures and reduce civil engineering work, medium and high head gates often use water filling valves to fill the water level with pressure. Existing water filling valves present several problems over long-term use. First, the high water pressure at the outlet of the filling valve can easily cause physical damage to other hydraulic structures behind the gate, such as gates or retaining walls, thereby affecting the safe operation of the dam. Second, the high-speed water flow can easily form a partial vacuum inside the filling valve pipe, causing flow vibration in the valve plate structure and even the gate. This can damage or loosen the guide block and fastening bolts, resulting in defects such as reduced vibration resistance and leakage in the filling valve, and accelerating its damage and aging.

[0003] According to the analysis of the causes of plane gate accidents, plane gate damage often occurs during the opening and closing process of the gate, which is often accompanied by violent vibration and easily induces resonance. The vibration of the gate can easily cause fatigue damage to its own structure, and under certain conditions it can even induce gate instability. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a water filling valve device with the function of counteracting energy dissipation and shock absorption.

[0005] The technical solution adopted by the present invention is: a water filling valve device with the function of counteracting energy dissipation and shock absorption, the water filling valve device is arranged obliquely and symmetrically at the top section of the gate, and the angle α between the center line of the water filling valve device and the center line of the gate slot is in the range of 30°-60°.

[0006] In the above scheme, two streams of water with almost equal speeds coming out of the water filling valve device (water outlet pipe section) will collide with each other to form a counter-energy dissipation; at the same time, it is ensured to be linked with the automatic hook-and-drop beam of the door machine, and the pressure difference signal combination of the upstream and downstream sides of the door body can be monitored in real time to ensure that the opening and closing of the water filling valve can be controlled.

[0007] A further preferred structure is that the water filling valve device includes a pipe body and a valve body, the pipe body includes an inlet pipe section and an outlet pipe section, the inlet pipe section and the outlet pipe section are respectively vertically connected to the two connecting ends at the lower end of the valve body through flanges and bolts and nuts, and a gate valve for opening and closing is provided inside the valve body, the gate valve is connected to the lower end of the internal threaded assembly rod end joint bearing through a connecting shaft, a counterweight is provided on the connecting shaft, the upper connecting end of the valve body and the lower end of the internal threaded assembly rod end joint bearing can be contacted and connected to form a closed cavity, and the upper end of the internal threaded assembly rod end joint bearing is connected to the connecting plate.

[0008] In the above solution, during the water filling process, the water filling valve is fully open due to the action of the drive device connected to the connecting plate. The bell-shaped air supply hole effectively prevents excessive flow vibration of the valve plate structure and damage or loosening of the guide device and fastening bolts, thereby enhancing the water filling valve's anti-vibration ability. Under the action of the gravity of the counterweight, the water filling valve is closed.

[0009] In a further preferred structure, the connecting plate is provided with a connecting hole for installing a driving device for driving the connecting plate to rise or fall.

[0010] In a further preferred structure, the water outlet pipe section is provided with a bell-mouth section, and the bell-mouth section is located at the connection with the flange for air replenishment.

[0011] In a further preferred structure, the bell-mouth section is provided with a plurality of bell-mouths, each having an aperture of Φ13-Φ19, ensuring that the opening area does not exceed 45% of the bell-mouth section.

[0012] In a further preferred structure, a dirt retaining strip is provided on one side of the tube body.

[0013] In a further preferred structure, the diameter of the water inlet pipe section is 295mm-305mm, and the diameter of the water outlet pipe section is 495mm-505mm.

[0014] In a further preferred structure, the diameter of the water outlet pipe section is larger than the diameter of the water inlet pipe section.

[0015] In a further preferred structure, the pipe body is made of Q355C, the valve body model is DN300 PN10, and the material is ductile iron.

[0016] In a further preferred structure, the internal thread assembled rod end joint bearing model is SI35ES.

[0017] In a further preferred structure, the water filling valve device is limited by the guide block and the gate lifting lug on both sides.

[0018] The water filling valve device of the present invention has been verified in the renovation of the gate of a hydropower station. It not only ensures the flat pressure of the maintenance gate of the power station, but also prevents the high-pressure water flow from directly acting on the hydraulic structure. At the same time, it reduces the overflow vibration of the water filling valve. Compared with the existing technology, it has the following obvious advantages:

[0019] 1. The filling valve device is arranged symmetrically at an angle at the top section of the gate, changing the direction of the water flow at the valve pipe outlet. The left and right water flows counteract each other and unload energy, thus preventing the impact damage of high-pressure and high-speed water flow on downstream civil structures or downstream gates.

[0020] 2. The valve pipes at both ends of the existing water filling valve have the same diameter, which is not conducive to slowing down the speed of water flow and easily causes the valve plate structure and even the gate to vibrate due to overflow. The water filling valve device of the present invention is provided with a bell-shaped air supply on the water outlet pipe of the water filling valve, which effectively solves the overflow vibration of the valve plate structure of the water filling valve and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the arrangement of the water filling valve in the prior art;

[0022] Figure 2 This is a schematic diagram of the arrangement position of the present invention;

[0023] Figure 3 This is a schematic diagram of the hedging energy dissipation arrangement of the present invention;

[0024] Figure 4 It is a plan view of the present invention;

[0025] Figure 5 This is an axonometric view of the present invention;

[0026] Figure 6 It is a schematic diagram of air supply in the bell mouth section of the present invention.

[0027] In the figure, 1-pipe body (1-1-bell mouth section), 2-flange, 3-valve body, 4-connecting shaft, 5-counterweight, 6-internal thread assembly rod end joint bearing, 7-connecting plate (7-1-connecting hole), 8-guide block, 9-bolts and nuts, 10-trash bar. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation to the present invention.

[0029] A set of maintenance gates and gate machine automatic hook-and-release beams at the water inlet of a hydropower station was put into operation in 1993 and has been in operation for 27 years. Without changing the existing metal structure and civil engineering, the gates and opening and closing equipment need to be updated. During the renovation of the gate pressure, considering the use of the existing filling valve layout (see Figure 1 A area), the water flow from the filling valve outlet will directly spray onto other gates or retaining walls and other hydraulic structures behind the maintenance gate, which cannot meet the requirements of energy dissipation and vibration reduction.

[0030] like Figure 2 As shown, the water filling valve device of the present invention is arranged obliquely and symmetrically at the top section of the gate, and the angle α between the center line of the water filling valve device and the center line of the gate slot is in the range of 30°-60°.

[0031] Figure 3The figure shows the counterbalancing and energy dissipation arrangement of the filling valves for the maintenance gates of a hydropower station. The two sets of filling valve devices are tilted at an angle α of 40° to the centerline of the gate slot. The two streams of water meet 1.1m behind the gates, counterbalancing and dissipating energy, so that the water flow does not cause catastrophic interference to downstream civil structures or downstream gates.

[0032] So that from the water filling valve device (water outlet pipe section, Figure 3 The two water flows with almost equal speeds coming out of the gate (as shown) collide with each other, forming a counter-energy dissipation; at the same time, it is ensured to be linked with the automatic hook-and-unhooking beam of the gate machine, and the comprehensive pressure difference signal of the upstream and downstream sides of the gate body can be monitored in real time to ensure that the opening and closing of the water filling valve can be controlled.

[0033] Combine Figure 4 、 Figure 5 As shown, the water filling valve device includes a pipe body 1 and a valve body 3, and the pipe body 1 includes an inlet pipe section and an outlet pipe section. The inlet pipe section and the outlet pipe section are respectively vertically connected to the two connecting ends at the lower end of the valve body 3 through a flange 2 and a bolt and nut 9. A gate valve for opening and closing is provided inside the valve body 3, and the gate valve is connected to the lower end of the internal threaded assembled rod end joint bearing 6 through a connecting shaft 4. A counterweight 5 is provided on the connecting shaft 4. The upper connecting end of the valve body 3 and the lower end of the internal threaded assembled rod end joint bearing 6 can be contacted and connected to form a closed cavity, and the upper end of the internal threaded assembled rod end joint bearing 6 is connected to the connecting plate 7.

[0034] During the water filling process, the water filling valve is in a fully open state under the action of the driving device connected to the connecting plate 7. Figure 6 As shown, the bell-mouth air-filling hole effectively avoids the flow-induced vibration of the valve plate structure and damage or loosening of the guide device, fastening bolts, etc., thereby enhancing the anti-vibration capability of the water filling valve. Under the gravity of the counterweight 5, the water filling valve is in a closed state.

[0035] The connecting plate 7 is provided with a connecting hole 7 - 1 for installing a driving device for driving the connecting plate 7 to rise or fall.

[0036] The water outlet pipe section is provided with a bell mouth section 1-1 for supplying air.

[0037] Combine Figure 6 As shown, the bell-mouth section 1-1 is provided with a plurality of bell-mouths, the aperture of which is Φ13-Φ19, preferably Φ16. The opening area is ensured not to exceed 45% of the bell-mouth section.

[0038] A dirt-trapping strip 10 is provided on one side of the tube body 1 .

[0039] The diameter of the water inlet pipe section is 295mm-305mm, and the diameter of the water outlet pipe section is 495mm-505mm. Preferably, the diameter of the water inlet pipe section is 300mm, and the diameter of the water outlet pipe section is 500mm.

[0040] The pipe body 1 is made of Q355C, and the valve body 3 is DN300 PN10 and is made of ductile iron.

[0041] The model of the internal thread assembled rod end joint bearing 6 is SI35ES.

[0042] The water filling valve device is limited by the guide block 8 and the two sides of the gate lifting lug.

[0043] The water filling valve of this invention is installed in the top section of the gate and is linked to the automatic hook-and-drop beam of the gate operator. Within the travel range of the water filling valve, the automatic hook-and-drop beam pre-lifts, and the water filling valve is linked to open, filling water from the upstream side of the gate body to the downstream side. When the designed pressure difference is reached, the water filling process ends, and the gate operator cooperates with the automatic hook-and-drop beam to carry out the gate lifting operation.

[0044] This invention tilts the filling valve assembly and incorporates a bell-shaped air inlet valve, effectively resolving existing issues such as gate vibration and localized water leakage. This invention offers advantages such as low investment, minimal technical risk, and simplified construction for retrofitting gates in power stations that have been in operation for several years.

[0045] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A water filling valve device with the function of counteracting energy dissipation and shock absorption, characterized by: The water filling valve device is arranged obliquely and symmetrically at the top section of the gate, and the angle α between the center line of the water filling valve device and the center line of the gate slot is in the range of 30°-60°; The water filling valve device comprises a pipe body (1) and a valve body (3), wherein the pipe body (1) comprises a water inlet pipe section and a water outlet pipe section, wherein the water inlet pipe section and the water outlet pipe section are respectively vertically connected to two connecting ends of the lower end of the valve body (3) via a flange (2) and a bolt nut (9), wherein an opening and closing gate valve is provided inside the valve body (3), wherein the gate valve is connected to the lower end of the internal thread assembly rod end joint bearing (6) via a connecting shaft (4), wherein a counterweight (5) is provided on the connecting shaft (4), wherein the upper connecting end of the valve body (3) and the lower end of the internal thread assembly rod end joint bearing (6) can be contacted and connected to form a closed cavity, and the upper end of the internal thread assembly rod end joint bearing (6) is connected to a connecting plate (7); The connecting plate (7) is provided with a connecting hole (7-1) for installing a driving device for driving the connecting plate (7) to rise or fall; The water outlet pipe section is provided with a bell mouth section (1-1), and the bell mouth section (1-1) is located at the connection with the flange (2) and is used for air supply; a plurality of bell mouths are provided on the bell mouth section (1-1).

2. A water filling valve device with the function of counteracting energy dissipation and shock absorption according to claim 1, characterized in that: A dirt-blocking strip (10) is provided on one side of the tube body (1).

3. The water filling valve device with the function of counteracting energy dissipation and shock absorption according to claim 1, characterized in that: The diameter of the water inlet pipe section is 295mm-305mm, and the diameter of the water outlet pipe section is 495mm-505mm.

4. The water filling valve device with the function of counteracting energy dissipation and shock absorption according to claim 1, characterized in that: The pipe body (1) is made of Q355C, and the valve body (3) is DN300 PN10 and is made of ductile iron.

5. The water filling valve device with the function of counteracting energy dissipation and shock absorption according to claim 1, characterized in that: The model of the internal thread assembled rod end joint bearing (6) is SI35ES.

6. The water filling valve device with the function of counteracting energy dissipation and shock absorption according to claim 1, characterized in that: The water filling valve device is limited by the guide block (8) and the two sides of the gate lifting lug.

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