High-pressure gate valve type gate system capable of avoiding turbulence phenomenon
By designing a high-pressure gate valve-type gate system including a stuffed cover and a double flange hydraulic starter, the problems of turbulence and cavitation in the medium and high-pressure high-speed water flow in the prior art are solved, and the long-term stable operation and maintenance convenience of the equipment is achieved.
Patent Information
- Application Number
- CN202421844756.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The existing high-pressure gate valve type gate system is prone to turbulence and cavitation in high-pressure and high-speed water flow, resulting in impact and oscillation of hydraulic starter and shutter and gate structures, which is not conducive to the long-term and stable operation of the equipment.
A high-pressure gate valve type gate system including gate concrete foundation, foundation connection structure, stuffed cover and hydraulic opening and closing machine was designed. The stuffed cover is connected to the base connecting structure through bolts to form a closed water cavity to avoid turbulence and cavitation. The hydraulic opening and closing machine adopts a double flange structure, and the lower flange seals the lower mounting hole on the bottom panel, and the upper flange bears the bearing capacity of mechanical action.
By closing the structural beam and piston rod section, a stable water flow state is formed, which avoids turbulence and cavitation, reduces the impact of fluid on the hydraulic opening and closing machines and gates, and improves the long-term operation stability and maintenance convenience of the equipment.
Smart Images
Figure CN222834834U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-pressure gate valve type gate system capable of avoiding turbulence phenomenon and is applicable to the field of water conservancy and hydropower engineering. Background Art
[0002] The tailwater emergency gate of the pumped storage power station adopts a high-pressure gate valve type gate operated by a hydraulic hoist; some conventional hydropower stations also need to use a high-pressure gate valve type gate system operated by a hydraulic hoist in some parts according to the needs of the project layout.
[0003] Figure 1 , Figure 2 The schematic diagram of the structure of the existing high-pressure gate valve type gate system is shown in the figure. The top surface of the cover of the existing gate system is a flat panel. Several structural beams are arranged under the panel to form several beam grids. The beam grids are in contact with high-pressure and high-speed water flow, which is prone to turbulence and cavitation. Unstable turbulence is also prone to cause impact shock (flow-induced vibration) to the gate structure held by the hydraulic hoist, which is not conducive to the long-term stable operation of the equipment.
[0004] In the prior art, the blind cover is fixed to the underlying connection structure via studs. The bolt through holes on the blind cover are first aligned with the threaded blind holes on the flange surface of the underlying connection structure, and then the studs are blindly screwed in. Blind screwing may cause the internal threads to be stripped and damaged, which is not convenient for long-term operation and maintenance. Utility Model Content
[0005] The technical problem to be solved by the utility model is: in view of the above existing problems, a high-pressure gate valve type gate system is provided which can avoid turbulence phenomenon.
[0006] The technical solution adopted by the utility model is: a high-pressure gate valve type gate system capable of avoiding turbulence phenomenon, characterized in that it includes:
[0007] The gate concrete foundation has a gate slot inside it;
[0008] A foundation connection structure, located at the top of the gate slot and fixedly connected to the gate concrete foundation;
[0009] The cover is fixedly mounted on the top of the basic connection structure, and has a flat top seat plate and a bottom panel, and a plurality of beam system structures connected between the top seat plate and the bottom panel. The top seat plate and the bottom panel are respectively provided with an upper mounting seat hole and a lower mounting seat hole, and the upper and lower mounting seat holes are concentrically arranged;
[0010] A hydraulic gate hoist is arranged corresponding to the upper mounting seat hole and the lower mounting seat hole, the lower end of the cylinder body of which is fixed to the top seat plate of the blind cover via an upper flange, and the piston rod of which passes through the lower mounting seat hole and is connected to the gate in the lower gate groove;
[0011] The lower flange has a guide sleeve which is sleeved on the piston rod of the hydraulic hoist, is fixedly connected to the bottom panel of the blind cover and blocks the lower mounting seat hole on the bottom panel.
[0012] The top of the foundation connection structure is higher than the top surface of the gate concrete foundation by a certain height, and a plurality of bolt through holes are formed on the top flange surface of the foundation connection structure;
[0013] The blind cover and the basic connection structure are connected by a plurality of bolts and nuts passing through the bolt through holes on the bottom plate of the blind cover and the bolt through holes on the top flange surface of the basic connection structure.
[0014] The interior of the blind cover is enclosed by a top seat plate, a bottom panel, an upper flange, a lower flange and a structural beam to form a closed installation space located around the piston rod of the hydraulic gate hoist, and an external ceramic rod stroke sensor is installed in the closed installation space.
[0015] The beneficial effects of the utility model are as follows: the utility model forms a closed pure plane on the water-facing side of the cover through the bottom panel cooperating with the lower flange, and does not affect the passage of the piston rod, and completely encloses the structural beams and the like above the pure plane, so that the cavity shape of the enclosed water body is very regular, the flow state of the water body is more stable, turbulence and cavitation are avoided, and the impact of the fluid on the hydraulic opening and closing machine and the gate is reduced.
[0016] The hydraulic gate hoist in the utility model adopts a double-flange structure. The introduction of the lower flange allows the upper and lower flanges to perform their respective functions. The lower flange only serves to seal the water body, and the water pressure in the cavity all acts on the lower flange ring (minus the inner circle area of the piston rod). The upper flange only serves as the mechanical action bearing flange of the entire hydraulic gate hoist. The external load at the lifting end of the piston rod of the hydraulic gate hoist is transmitted to the force of the piston rod, and the deadweight load of the gate hoist are all borne by the upper flange. This structural arrangement makes the structural force transmission path and mode single and clear.
[0017] In the utility model, the foundation connection structure connected with the blind cover is raised by a height h compared with the gate concrete foundation, so that the blind cover and the foundation connection structure are both provided with through holes, and bolts and nuts are used for fastening. Therefore, the flange surface of the foundation connection structure does not need to be tapped with blind holes, and the installation tightening torque of the bolt pair is easier to control. At the same time, the tightening method of the through hole avoids the possible internal thread stripping damage caused by blind screwing, which is convenient for long-term operation and maintenance.
[0018] In the utility model, the interior of the blind cover is enclosed by a top plate, a bottom plate, an upper flange, a lower flange and a structural beam to form a closed installation space located around the piston rod of the hydraulic gate hoist, so that the piston rod section between the upper and lower flanges has the conditions for installing a stroke sensor integrated in the ceramic coating: 1. water blocking; 2. being attached to the piston rod next to the lower cover of the cylinder, so that the hydraulic gate hoist of the utility model has the conditions for installing an external ceramic rod stroke sensor, thereby greatly improving the stroke detection accuracy of the hydraulic gate hoist. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 , 2 It is a structural schematic diagram of the prior art.
[0020] Figure 3 It is a structural schematic diagram of an embodiment.
[0021] Figure 4 , Figure 5 Schematic diagram of the installation of the external ceramic rod stroke sensor in the embodiment.
[0022] Figure 6 , Figure 7 , Figure 8 It is a three-dimensional schematic diagram of the cover in the embodiment.
[0023] 1. Gate concrete foundation; 2. Foundation connection structure; 3. Cover; 31. Top seat plate; 32. Structural beam; 33. Bottom panel; 4. Hydraulic gate opening and closing machine; 41. Cylinder body; 42. Piston rod; 5. Upper flange; 6. Lower flange; 7. External ceramic rod stroke sensor. DETAILED DESCRIPTION
[0024] like Figure 3 As shown, this embodiment is a high-pressure gate valve type gate system that can avoid turbulence. A gate groove is provided inside the gate concrete foundation. A foundation connection structure fixed to the gate concrete foundation is provided at the top of the gate groove. The flange surface at the top of the foundation connection structure is higher than the top surface of the gate concrete foundation by a certain height h. A hydraulic gate hoist is installed on the flange surface at the top of the foundation connection structure through a cover, and the piston rod of the hydraulic gate hoist is connected to the gate in the gate groove below.
[0025] In this example, the cover has a flat top seat plate and a bottom panel, and a plurality of staggered structural beams connected between the top seat plate and the bottom panel. The top seat plate and the bottom panel are respectively provided with upper mounting seat holes and lower mounting seat holes corresponding to each other.
[0026] In this embodiment, the hydraulic gate hoist is arranged corresponding to the upper mounting seat hole and the lower mounting seat hole, and the lower end of the cylinder body is fixed to the top seat plate of the blind cover through the upper flange, and the piston rod thereof passes through the lower mounting seat hole below and is connected to the gate in the gate slot below. A lower flange is fixed to the bottom plate of the blind cover, and the lower flange has a guide sleeve mounted on the piston rod, and the lower flange blocks the lower mounting seat hole on the bottom plate.
[0027] In this example, a plurality of bolt through holes corresponding to the bolt through holes on the bottom plate of the blind cover are formed on the top flange surface of the basic connection structure, and the blind cover and the basic connection structure are connected by a plurality of bolts and nuts passing through the bolt through holes on the bottom plate of the blind cover and the bolt through holes on the top flange surface of the basic connection structure.
[0028] In this embodiment, a closed installation space is formed inside the cover by the top seat plate, the bottom panel, the upper flange, the lower flange and the structural beam around the piston rod of the hydraulic gate hoist. An external ceramic rod stroke sensor is installed in the closed installation space. The sensor can adopt a complete set of LENORD+BAUER (Changzhou Hydraulic Complete Equipment Factory Co., Ltd.), Rexroth CI MS (Bosch Rexroth), Wujin CPMS (Jiangsu Wujin Hydraulic Gate Hoist Co., Ltd.).
[0029] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A high-pressure gate valve system capable of avoiding turbulence, characterized in that: include: The gate concrete foundation has a gate slot inside it; A foundation connection structure, located at the top of the gate slot and fixedly connected to the gate concrete foundation; The cover is fixedly mounted on the top of the basic connection structure, and has a flat top seat plate and a bottom panel, and a plurality of beam system structures connected between the top seat plate and the bottom panel. The top seat plate and the bottom panel are respectively provided with an upper mounting seat hole and a lower mounting seat hole, and the mounting seat holes are arranged concentrically; A hydraulic gate hoist is arranged corresponding to the upper mounting seat hole and the lower mounting seat hole, the lower end of the cylinder body of which is fixed to the upper surface of the upper seat plate of the cover through the upper flange, and the piston rod of which passes through the lower mounting seat hole and is connected to the gate in the lower gate groove; The lower flange has a guide sleeve which is sleeved on the piston rod of the hydraulic gate hoist, is fixedly connected to the bottom plate of the blind cover and blocks the lower mounting seat hole of the bottom panel.
2. The high-pressure gate valve type gate system capable of avoiding turbulence according to claim 1, characterized in that: The top of the foundation connection structure is higher than the top surface of the gate concrete foundation by a certain height, and a plurality of bolt through holes are formed on the top flange surface of the foundation connection structure; The blind cover and the basic connection structure are connected and sealed with water through a plurality of bolt through holes on the bottom panel of the blind cover and bolts and nuts on the bolt through holes on the top flange surface of the basic connection structure.
3. The high-pressure gate valve type gate system capable of avoiding turbulence according to claim 1, characterized in that: The interior of the blind cover is enclosed by a top seat plate, a bottom panel, an upper flange, a lower flange and a structural beam to form a closed installation space located around the piston rod of the hydraulic gate hoist, and an external ceramic rod stroke sensor is installed in the closed installation space.