A multi-stage composite energy dissipation cone valve

Abstract

The utility model provides a kind of multistage composite energy dissipation conical valve, including conical valve, energy dissipation cover and air supplement pipe, energy dissipation cover is peripherally set to the discharge end of conical valve, and first energy dissipation net and second energy dissipation net are set in energy dissipation cover along the axial direction, first energy dissipation net and second energy dissipation net will energy dissipation cover inner space be divided into first energy dissipation space, second energy dissipation space and advection space in turn along the axial direction, air supplement pipe is set on energy dissipation cover, air supplement pipe is connected to first energy dissipation space, and the medium with pressure that conical valve flows out can be sequentially released energy dissipation to advection space by first energy dissipation net and second energy dissipation net.The utility model discloses a kind of multistage composite energy dissipation conical valve, by conical valve core, spherical cap energy dissipation net and conical flow guide cover three-stage collaborative energy dissipation, total energy dissipation efficiency can reach more than 90%, can be adjusted valve core opening by drive control assembly, adaptive head 50-300m, the working condition of flow 50-500m³ / h, meet the needs of many scenes, such as hydropower station, large reservoir, city flood control.

Description

Technical Field

[0001] This utility model belongs to the field of valves in water conservancy projects, and in particular relates to a multi-stage composite energy dissipation cone valve. Background Technology

[0002] Existing energy-dissipating cone valves mostly adopt a single cone valve core or a single-layer energy-dissipating cover structure. In high-head (e.g., ≥100m) flood discharge and reservoir drainage scenarios, the following core problems exist: 1. Concentrated water flow impacts the downstream foundation of the valve body, which can easily cause erosion and shorten the service life of the project; 2. The friction between the high-speed water flow and the valve body wall generates strong cavitation, which causes the valve core and energy dissipation cover to wear out too quickly, requiring frequent maintenance; 3. A single energy dissipation path cannot achieve step-by-step pressure reduction, resulting in insufficient energy dissipation efficiency, easy generation of pipeline vibration, and impact on system stability.

[0003] Existing technologies attempt to optimize energy dissipation through multi-stage flow guides, but fail to incorporate the impact resistance of the spherical crown structure; they only focus on valve opening and closing functions and do not form a collaborative design with energy dissipation networks and multi-stage flow guides, thus failing to meet the dual requirements of "high-efficiency energy dissipation + damage resistance and durability" in high-head scenarios. Summary of the Invention

[0004] In view of this, the present invention aims to provide a multi-stage composite energy dissipation cone valve to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A multi-stage composite energy-dissipating conical valve includes a conical valve, an energy-dissipating hood, and an air supply pipe. An energy-dissipating hood is provided around the discharge end of the conical valve, and a first energy-dissipating mesh and a second energy-dissipating mesh are arranged axially inside the energy-dissipating hood. The first energy-dissipating mesh and the second energy-dissipating mesh divide the space inside the energy-dissipating hood into a first energy-dissipating space, a second energy-dissipating space, and a horizontal flow space in sequence. An air supply pipe is provided on the energy-dissipating hood and is connected to the first energy-dissipating space. The pressurized medium flowing out of the conical valve can release energy and dissipate to the horizontal flow space in sequence through the first energy-dissipating mesh and the second energy-dissipating mesh.

[0006] Furthermore, the outer peripheries of the first energy dissipation net and the second energy dissipation net are respectively fixedly sleeved onto the inner ring of the energy dissipation cover, and the first energy dissipation net is a hollow frustum structure, the second energy dissipation net is a spherical crown structure, and water-permeable holes are evenly distributed on the first energy dissipation net and the second energy dissipation net.

[0007] Furthermore, the end of the first energy dissipation mesh near the discharge end of the cone valve is the small diameter end, and the large diameter end of the first energy dissipation mesh is near the second energy dissipation mesh.

[0008] Furthermore, the convex surface of the second energy dissipation net faces the first energy dissipation net.

[0009] Furthermore, a third energy dissipation net is fitted inside the middle of the first energy dissipation net, and the third energy dissipation net is a hollow frustum structure. The third energy dissipation net and the second energy dissipation net are arranged opposite to each other, and the small diameter end of the third energy dissipation net is fixedly connected to the convex surface of the spherical crown of the second energy dissipation net.

[0010] Furthermore, the conical valve includes a valve body, an assembly flange sleeved around the valve body, one end of the energy dissipation shroud fixedly connected to one end of the assembly flange, a sliding sleeve slidably disposed around the discharge end of the valve body, the sliding sleeve being located in the inner ring of the energy dissipation shroud and coaxially disposed with the energy dissipation shroud, a plurality of first guide plates are installed circumferentially around the inner ring of the discharge end of the valve body, one end of each first guide plate is fixedly connected to the outer periphery of the conical end of the conical valve seat, and one end of the sliding sleeve can abut against the outer periphery of the conical valve seat, a drive assembly is installed on the valve body, and the drive assembly can drive the sliding sleeve to slide along the axial track of the conical valve seat.

[0011] Furthermore, a plurality of support rods are circumferentially mounted on one end of the conical valve seat, and one end of each support rod is fixedly connected to the inner ring of the energy dissipation shroud.

[0012] Furthermore, a first energy dissipation channel can be formed between two adjacent first guide plates; multiple second guide plates are installed circumferentially around the periphery of the first energy dissipation net, one end of each second guide plate is fixedly connected to the inner ring of the energy dissipation hood, and a second energy dissipation channel is formed between two adjacent second guide plates, and the first energy dissipation channel is connected to the second energy dissipation channel.

[0013] Furthermore, the drive assembly includes a drive motor, a lead screw, a slide rail, and a slider. The sliding sleeve has a threaded hole, and the lead screw is connected to the threaded hole. The lead screw and the conical valve seat are arranged parallel to each other. The slider is arranged on the inner ring of the sliding sleeve. The slide rail is arranged on the outer periphery of the discharge end of the valve body. One end of the slider is slidably connected to the outer periphery of the slide rail. The drive motor is fixedly installed on the valve body and is used to rotate the electric lead screw.

[0014] Furthermore, a displacement detection device is provided between the sliding sleeve and the valve body, and the displacement detection device is any one of an encoder, a grating ruler, or a displacement sensor.

[0015] Compared with existing technologies, the multi-stage composite energy-dissipating cone valve of this utility model has the following beneficial effects: through the three-stage coordinated energy dissipation of the cone valve core, the spherical crown energy dissipation net, and the cone guide shroud, the total energy dissipation efficiency can reach more than 90%. Compared with traditional cone valves, it reduces downstream scouring force by 40%-50%. The spherical crown energy dissipation net buffers the water flow impact, and with the wear-resistant coating of the outlet guide section, the cavitation wear rate is reduced by more than 60%, and the valve service life is extended by 2-3 times. The valve core opening can be adjusted by the drive control component to adapt to working conditions with a head of 50-300m and a flow rate of 50-500m³ / h, meeting the needs of multiple scenarios such as hydropower stations, large reservoirs, and urban flood control. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the structure of a multi-stage composite energy-dissipating cone valve according to an embodiment of the present invention; Figure 2 This is a front view schematic diagram of a multi-stage composite energy-dissipating cone valve according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of installing multiple first guide plates in the valve body according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the valve body, sliding sleeve and valve seat as described in the embodiment of this utility model; Figure 5 This is a schematic diagram of the valve body and valve seat mating structure according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the energy dissipation cover according to an embodiment of the present utility model; Figure 7 This is a cross-sectional structural diagram of a multi-stage composite energy-dissipating cone valve according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1-Conical valve; 11-Valve body; 12-Sliding sleeve; 13-First guide plate; 14-Support rod; 15-Valve seat; 2-Energy dissipation hood; 21-First energy dissipation net; 22-Second energy dissipation net; 23-Horizontal flow space; 24-Second energy dissipation space; 25-Third energy dissipation net; 26-Second guide plate; 3-Air supply pipe; 4-Drive assembly; 41-Drive motor; 42-Slide rail; 43-Slider. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-7As shown, a multi-stage composite energy-dissipating conical valve includes a conical valve 1, an energy-dissipating hood 2, and an air supply pipe 3. The energy-dissipating hood 2 is installed around the discharge end of the conical valve 1, and a first energy-dissipating mesh 21 and a second energy-dissipating mesh 22 are arranged axially inside the energy-dissipating hood 2. The first and second energy-dissipating meshes 21 and 22 sequentially divide the space inside the energy-dissipating hood 2 into a first energy-dissipating space, a second energy-dissipating space 24, and a horizontal flow space 23. An air supply pipe 3 is installed on the energy-dissipating hood 2 and connects to the first energy-dissipating space. The pressurized medium flowing out of the conical valve 1 can sequentially pass through the first and second energy-dissipating meshes 21 and 22 to release energy and dissipate it into the horizontal flow space 23. The horizontal flow space 23 is coated with a wear-resistant coating of the prior art to improve the product's service life and reduce water flow friction and wear. In this application, the conical valve 1 itself is a first-stage energy-dissipating unit. The system uses a conical valve core to guide the water flow in a fan shape for initial dispersion, achieving a first pressure reduction (pressure reduction range of 40%-50%). Then, the water is further dissipated through the first energy dissipation net 21 and the second energy dissipation net 22. In this embodiment, the outlet end of the air supply pipe 3 is higher than the horizontal plane of the energy dissipation cover 2, and the outlet end of the air supply pipe 3 is higher than the head height of the pressurized medium to prevent pressurized water from escaping through the air supply pipe 3. In this embodiment, the function of the air supply pipe 3 is to discharge the air dissolved in the pressurized water and the gas released by the water temperature change, avoiding the formation of "air plugs" at the high point of the pipe that block the water flow, or the pipe vibration and noise (water hammer phenomenon) caused by gas impact. In addition, when the system (such as the water intake end or the pipe empties) has negative pressure, the air supply pipe 3 can replenish air in time to prevent the pipe from collapsing due to excessive internal and external pressure difference.

[0023] In this embodiment, the outer peripheries of the first energy dissipation mesh 21 and the second energy dissipation mesh 22 are respectively fixedly sleeved onto the inner ring of the energy dissipation cover 2. The first energy dissipation mesh 21 has a hollow frustum structure, and the second energy dissipation mesh 22 has a spherical crown structure. Water-permeable holes are evenly distributed on the first energy dissipation mesh 21 and the end of the first energy dissipation mesh 21 near the discharge end of the conical valve 1 is the small diameter end, and the large diameter end of the first energy dissipation mesh 21 is close to the second energy dissipation mesh 22. The convex surface of the spherical crown of the second energy dissipation mesh 22 faces the first energy dissipation mesh 21. A third energy dissipation mesh 25 is sleeved on the inner ring of the middle part of the first energy dissipation mesh 21, and the third energy dissipation mesh 25 has a hollow frustum structure. The third energy dissipation mesh 25 and the second energy dissipation mesh 22 are aligned. The third energy dissipation net 25 is fixedly connected to the spherical crown convex surface of the second energy dissipation net 22 at its small diameter end. Through the three-stage coordinated energy dissipation of the conical valve 1 core, the spherical crown energy dissipation net, and the conical guide shroud, the total energy dissipation efficiency can reach more than 90%. Compared with the traditional conical valve 1, it reduces the downstream scouring force by 40%-50%. The spherical crown energy dissipation net buffers the water flow impact, and with the wear-resistant coating of the outlet guide section, the cavitation wear rate is reduced by more than 60%, and the valve service life is extended by 2-3 times. The valve core opening can be adjusted by the drive control component to adapt to working conditions with a head of 50-300m and a flow rate of 50-500m³ / h, meeting the needs of multiple scenarios such as hydropower stations, large reservoirs, and urban flood control.

[0024] like Figure 7 As shown, the conical valve 1 includes a valve body 11, with an assembly flange fitted around the valve body 11. One end of the energy dissipation cover 2 is fixedly connected to one end of the assembly flange. A sliding sleeve 12 is slidably disposed around the discharge end of the valve body 11. The sliding sleeve 12 is located in the inner ring of the energy dissipation cover 2 and is coaxially disposed with the energy dissipation cover 2. Multiple first guide plates 13 are installed circumferentially around the inner ring of the discharge end of the valve body 11. One end of each first guide plate 13 is fixedly connected to the outer periphery of the conical end of the conical valve seat 15. One end of the sliding sleeve 12 can abut against the outer periphery of the conical valve seat 15. A drive assembly 4 is installed on the valve body 11. The drive assembly 4 can drive the sliding sleeve 12 to slide along the axial track of the conical valve seat 15. Multiple support rods 14 are installed circumferentially around one end of the conical valve seat 15. One end of each support rod 14 is fixedly connected to the inner ring of the energy dissipation cover 2. The multiple support rods 14 can stabilize the relative position of the valve seat 15 and the energy dissipation cover 2 to prevent them from shifting.

[0025] Two adjacent first guide plates 13 can form a first energy dissipation channel; multiple second guide plates 26 are installed circumferentially around the first energy dissipation net 21, and one end of each second guide plate 26 is fixedly connected to the inner ring of the energy dissipation cover 2. Two adjacent second guide plates 26 form a second energy dissipation channel, and the first energy dissipation channel is connected to the second energy dissipation channel.

[0026] A third energy dissipation net 25 is set at the center of the first energy dissipation net 21. The outer wall of the first energy dissipation net 21 is provided with 3-5 second guide plates 26. The second energy dissipation channel is formed between two adjacent second guide plates 26. The first energy dissipation channel and the second energy dissipation channel are connected. The pressurized medium will flow from the first energy dissipation channel into the second energy dissipation channel. During the process, the frictional resistance between air and water flow is used to achieve a second pressure reduction (pressure reduction range of 25%-35%). A second energy dissipation net 22 in the shape of a spherical crown is coaxially set at the rear section of the first energy dissipation net 21. The second energy dissipation net 22 adopts a high-strength stainless steel mesh with honeycomb-shaped holes. The convex surface of the spherical crown faces the direction of the incoming flow. The spherical crown structure disperses the impact force of the water flow. At the same time, the water flow is cut through the mesh holes to achieve a third pressure reduction (pressure reduction range of 25%-30%). The drive assembly 4 includes a drive motor 41, a lead screw, a slide rail 42, and a slider 43. The sliding sleeve 12 has a threaded hole through which the lead screw is threadedly connected. The lead screw is parallel to the cone valve seat 1. The slider 43 is mounted on the inner ring of the sliding sleeve 12. The slide rail 42 is located around the discharge end of the valve body 11. One end of the slider 43 is slidably connected to the outer periphery of the slide rail 42. The drive motor 41 is fixedly mounted on the valve body 11, and its output end is connected to a gearbox to drive the lead screw to rotate. A displacement detection device is provided between the sliding sleeve 12 and the valve body 11. The displacement detection device can be any of the existing encoders, grating rulers or displacement sensors. The displacement detection device signal is connected to the controller, which can be a microcontroller or PLC. The control system of the controller can achieve precise adjustment of the valve core opening (adjustment accuracy ±0.1mm) to adapt to different flow requirements.

[0027] In this embodiment, the cone valve seat 1 is made of 2Cr13 stainless steel (corrosion resistant), the spherical crown-shaped second energy dissipation mesh 22 is made of 316L stainless steel wire (wire diameter 1.2-1.5mm, mesh size 8-10mm), the first energy dissipation mesh 21 and the third energy dissipation mesh 25 are made of Q345R steel plate (thickness 8-12mm), the inner wall of the outlet horizontal flow space 23 is sprayed (coating thickness 0.3-0.5mm), and the energy dissipation cover 2 is bolted to the valve body 11 through a stepped mounting groove to ensure that the coaxiality error is ≤0.05mm and to ensure transmission accuracy. The controller controls the system to set different valve core openings (0%-100%), monitors the outlet water pressure and velocity, and ensures that the outlet flow velocity is stable at 3-5m / s under the design head, without obvious vibration.

[0028] The control method in this embodiment is controlled by a controller. The controller circuit can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this document is mainly used to protect mechanical devices, and the control method and circuit connection will not be explained in detail here.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage composite energy-dissipating cone valve, characterized in that: The device includes a conical valve (1), an energy dissipation hood (2), and a gas supply pipe (3). An energy dissipation hood (2) is provided around the discharge end of the conical valve (1). A first energy dissipation net (21) and a second energy dissipation net (22) are provided axially inside the energy dissipation hood (2). The first energy dissipation net (21) and the second energy dissipation net (22) divide the space inside the energy dissipation hood (2) into a first energy dissipation space, a second energy dissipation space (24), and a horizontal flow space (23) in sequence. A gas supply pipe (3) is provided on the energy dissipation hood (2). The gas supply pipe (3) is connected to the first energy dissipation space. The pressurized medium flowing out of the conical valve (1) can be released and dissipated into the horizontal flow space (23) in sequence through the first energy dissipation net (21) and the second energy dissipation net (22).

2. The multi-stage composite energy-dissipating cone valve according to claim 1, characterized in that: The outer periphery of the first energy dissipation net (21) and the second energy dissipation net (22) are respectively fixedly sleeved to the inner ring of the energy dissipation cover (2). The first energy dissipation net (21) is a hollow frustum structure, and the second energy dissipation net (22) is a spherical crown structure. Water-permeable holes are evenly distributed on the first energy dissipation net (21) and the second energy dissipation net (22).

3. The multi-stage composite energy-dissipating cone valve according to claim 2, characterized in that: The end of the first energy dissipation mesh (21) near the discharge end of the cone valve (1) is the small diameter end, and the large diameter end of the first energy dissipation mesh (21) is near the second energy dissipation mesh (22).

4. A multi-stage composite energy-dissipating cone valve according to claim 2, characterized in that: The convex surface of the second energy dissipation net (22) faces the first energy dissipation net (21).

5. A multi-stage composite energy-dissipating cone valve according to claim 2, characterized in that: The third energy dissipation net (25) is fitted in the inner circle of the middle part of the first energy dissipation net (21), and the third energy dissipation net (25) is a hollow frustum structure. The third energy dissipation net (25) and the second energy dissipation net (22) are arranged opposite to each other, and the small diameter end of the third energy dissipation net (25) is fixedly connected to the convex surface of the second energy dissipation net (22).

6. A multi-stage composite energy-dissipating cone valve according to claim 1, characterized in that: The conical valve (1) includes a valve body (11), an assembly flange is fitted around the valve body (11), one end of the energy dissipation cover (2) is fixedly connected to one end of the assembly flange, a sliding sleeve (12) is slidably arranged around the discharge end of the valve body (11), the sliding sleeve (12) is located in the inner ring of the energy dissipation cover (2) and is coaxially arranged with the energy dissipation cover (2), a plurality of first guide plates (13) are installed circumferentially around the inner ring of the discharge end of the valve body (11), one end of each first guide plate (13) is fixedly connected to the outer periphery of the conical end of the conical valve seat (15), and one end of the sliding sleeve (12) can abut against the outer periphery of the conical valve seat (15), a drive assembly (4) is installed on the valve body (11), and the drive assembly (4) can drive the sliding sleeve (12) to slide along the axial path of the conical valve seat (15).

7. A multi-stage composite energy-dissipating cone valve according to claim 6, characterized in that: Multiple support rods (14) are circumferentially mounted on one end of the conical valve seat (15), and one end of each support rod (14) is fixedly connected to the inner ring of the energy dissipation cover (2).

8. A multi-stage composite energy-dissipating cone valve according to claim 6, characterized in that: Two adjacent first guide plates (13) can form a first energy dissipation channel; multiple second guide plates (26) are installed around the periphery of the first energy dissipation net (21), and one end of each second guide plate (26) is fixedly connected to the inner ring of the energy dissipation cover (2). Two adjacent second guide plates (26) form a second energy dissipation channel, and the first energy dissipation channel is connected to the second energy dissipation channel.

9. A multi-stage composite energy-dissipating cone valve according to claim 6, characterized in that: The drive assembly (4) includes a drive motor (41), a lead screw, a slide rail (42), and a slider (43). The sliding sleeve (12) is provided with a threaded hole, and the lead screw is connected to the threaded hole. The lead screw and the cone valve (1) seat are arranged parallel to each other. The slider (43) is provided on the inner ring of the sliding sleeve (12). The slide rail (42) is provided on the outer periphery of the discharge end of the valve body (11). One end of the slider (43) is slidably connected to the outer periphery of the slide rail (42). The drive motor (41) is fixedly installed on the valve body (11). The drive motor (41) is used to rotate the electric lead screw.

10. A multi-stage composite energy-dissipating cone valve according to claim 9, characterized in that: A displacement detection device is provided between the sliding sleeve (12) and the valve body (11), and the displacement detection device is any one of an encoder, a grating ruler or a displacement sensor.

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