Rotary tangent water inlet device of multi-layer rotational flow grit chamber

Abstract

The utility model discloses a rotary tangent water inlet device of a multi-layer rotational flow grit chamber, which comprises a stacked disc, a water distribution port component is spirally connected with the tangent angle of the stacked disc, the end part of the water distribution port component is connected with a water inlet component through a water segregator, the water inlet component comprises a water inlet, the vertical line direction of the water inlet is gradually reduced, and the vertical line direction of the water inlet is gradually reduced. The horizontal direction is gradually expanded, the gradually-shrinking angle is smaller than or equal to 15 degrees, the gradually-expanding angle is smaller than or equal to 10-20 degrees, and the gradually-shrinking angle is smaller than or equal to the gradually-expanding angle; the water flow enters the stacked disc from the outside of the stacked disc and rotates to enter the stacked disc through the tangent angle, so that the length of the water inlet device can be prolonged, the diverging ratio of the water inlet device and the inclination angle of the bottom edge of the lower portion of the water inlet device are adjusted, the flow speed changes stably, the turbulence degree is reduced, and the water flow is more stable when entering the stacked disc spiral flow cavity; the top elevation of the water inlet is higher than the upper edge of the top stacked disc by a certain height, and it is guaranteed that the water inlet liquid level elevation is higher than the water outlet liquid level elevation of the stacked disc, so that the device is driven by hydraulic power to operate.

Description

Technical Field

[0001] This utility model relates to a water inlet device, and more particularly to a rotating tangential water inlet device for a multi-layer vortex grit chamber. Background Technology

[0002] In the wastewater treatment process, high-efficiency hydraulic vortex grit chambers are used as a pretreatment measure to remove sand and gravel from wastewater. To achieve high removal efficiency and sand and gravel precision, high-efficiency hydraulic vortex grit chambers are equipped with multi-layer stacked discs. In actual operation, the uniformity of water distribution in the multi-layer stacked discs has a great impact on the removal efficiency.

[0003] Due to the limited length of the inlet device, the inlet expansion ratio is relatively large, resulting in a large velocity gradient and making it easier to generate eddies, which affects the uniformity of water distribution. The large number of stacked discs in the inlet device results in a large angle of inclination at the bottom edge of the inlet device, which easily generates flow separation or eddies. Furthermore, fluid inertia may cause water to flow towards the stacked discs with lower resistance, thereby further aggravating the unevenness of water distribution. Utility Model Content

[0004] This invention provides a rotating tangential water inlet device for a multi-layer vortex grit chamber to overcome the defects of uneven water distribution caused by multi-layer stacked discs in existing water inlet devices.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a rotating tangential water inlet device for a multi-layer vortex grit chamber, including a stacked disc. A water distribution port assembly is spirally connected to the stacked disc at a tangential angle. The end of the water distribution port assembly is connected to the water inlet assembly through a water distributor. The water inlet assembly includes a water inlet. The vertical direction of the water inlet is gradually narrowing, and its horizontal direction is gradually expanding. The narrowing angle is ≤15°, the expanding angle is ≤10~20°, and the narrowing angle is ≤20°.

[0007] Furthermore, a square hole is provided at the upper middle part of the water inlet, and a sealing gasket and a cover plate are provided on the hole. The water inlet is connected to the sealing gasket and the cover plate by fixing bolts. An exhaust pipe is provided at the top of the water inlet to discharge air and ensure that the water flow rate and flow pattern are not affected.

[0008] Furthermore, the inclination angle of the bottom plate of the inlet assembly is set to 50° to 63°, and the inclination angle of its top plate matches the operating head difference of the multi-layer vortex grit chamber and the head above the weir.

[0009] Furthermore, the water distributor includes a water outlet, one end of which is welded to one end of the water inlet fixing plate and the other end of which is welded to the water outlet fixing plate. The other end of the water inlet fixing plate is connected to the water inlet by bolts. The number of water outlets is consistent with the number of stacked discs. The upper edge of each water outlet is inclined upward and consistent with the water inlet path.

[0010] Furthermore, the stacked tray includes an outer stacked tray plate and an inner stacked tray plate.

[0011] Furthermore, the water distribution port assembly includes a water distribution port top plate, which is connected to the water distribution port bottom plate below it through the water distribution port outer side plates and the water distribution port inner side plates on both sides. The water distribution port outer side plates are tangentially connected to the stacked plate outer side plates, and the water distribution port inner side plates are tangentially connected to the stacked plate inner side plates. An opening is provided on the stacked plate outer side plate between the two connection points.

[0012] Furthermore, the inlet end of the water inlet is square in shape to adapt to the concrete pool type, and its height is determined according to the water level in the inlet channel.

[0013] The beneficial effects achieved by this utility model are as follows: water enters the stacked discs from the outside and rotates through the tangent angle to enter the stacked discs. This method can extend the length of the water inlet device, adjust the diffusion ratio of the water inlet device and the angle of inclination of the bottom edge of the water inlet device, so that the flow velocity changes smoothly, the degree of turbulence disturbance is reduced, and the water flow is more stable when entering the vortex cavity of the stacked discs. This is conducive to the uniform water distribution of each layer of the stacked discs. The top elevation of the water inlet is higher than the upper edge of the top stacked disc by a certain height, ensuring that the water level inlet is higher than the water level outlet of the stacked discs, so as to realize the operation of the hydraulically driven device. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the water inlet structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the water distributor of this utility model;

[0018] Figure 4 This is a schematic diagram of the water distribution port of this utility model;

[0019] Figure 5 This is a schematic diagram of the stacked tray structure of this utility model.

[0020] In the diagram: 1. Water inlet assembly; 1-1. Water inlet; 1-2. Fixing bolt; 1-3. Sealing gasket; 1-4. Cover plate; 1-5. Vent pipe; 2. Water distributor; 2-1. Water inlet fixing plate; 2-2. Water distributor; 2-3. Water outlet fixing plate; 2-4. Bolt; 3. Water distribution assembly; 3-1. Water distribution outer plate; 3-2. Water distribution inner plate; 3-3. Water distribution top plate; 3-4. Water distribution bottom plate; 4. Stacking tray; 4-1. Stacking tray outer plate; 4-2. Stacking tray inner plate. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example 1

[0023] like Figures 1-5 As shown, a rotating tangential water inlet device for a multi-layer vortex grit chamber includes a stacked disc 4, a water distribution assembly 3 which is spirally connected to the stacked disc 4 at a tangential angle, and the end of the water distribution assembly 3 is connected to the water inlet assembly 1 through a water distributor 2.

[0024] The inlet assembly 1 includes an inlet 1-1, with a square hole at the upper part of the inlet 1-1. A sealing gasket 1-3 and a cover plate 1-4 are installed on the hole. The inlet 1-1 is connected to the sealing gasket 1-3 and the cover plate 1-4 by fixing bolts 1-2. When the inlet flow rate exceeds the processing capacity of the high-precision multi-layer hydrocyclone sand removal device, the sealing gasket 1-3 and the cover plate 1-4 can be removed to achieve overflow. An exhaust pipe 1-5 is installed at the top of the inlet 1-1. When the inlet flow is unstable and turbulence causes air to enter the inlet, it can be discharged through the exhaust pipe 1-5 to ensure that the inlet flow rate and flow state are not affected.

[0025] The vertical direction of inlet 1-1 is gradually narrowing, while its horizontal direction is gradually widening. The narrowing angle is ≤15°, and the widening angle is ≤10~20°, with the narrowing angle ≤ the widening angle. The cross-sectional area of ​​the inlet increases slowly. This method controls the velocity gradient within the inlet within a certain range, avoiding turbulence that may be caused by increased velocity. Local high-velocity areas can easily cause water distribution impact, affecting the uniformity of water distribution. At the same time, it also avoids a rapid decrease in velocity, which can lead to flow separation and the formation of eddies, exacerbating uneven velocity distribution.

[0026] The initial section of inlet assembly 1 allows for horizontal water intake, followed by downward flow at an angle into distributor 2. The inclination angle of the bottom plate of inlet assembly 1 is controlled between 50° and 63° to avoid excessive angles. This, combined with controlled flow velocity, mitigates secondary flows and eddies caused by water inertia, thus alleviating uneven water distribution. The inclination angle of the top plate of inlet assembly 1 is determined based on the operating head difference of the multi-layer vortex grit chamber and the head above the weir. Combined with the inclination angle design of the bottom plate of inlet assembly 1, this ensures that the inlet cross-sectional area changes slowly with the length of the inlet, avoiding sudden changes in flow velocity that could cause turbulence.

[0027] The inlet 1-1 is square in shape to suit concrete pools and is easy to manufacture. The cross-sectional area of ​​the inlet is designed according to the processing flow of the high-precision multi-layer hydrocyclone sand removal device to meet certain flow velocity requirements. At this flow velocity, the water distribution is more uniform. The height of the inlet 1-1 is determined according to the effective inlet liquid level of the inlet channel to adapt to the actual liquid level requirements, making the inlet flow more stable and ensuring more uniform water distribution.

[0028] The water distributor 2 includes a water inlet 2-2. One end of the water inlet 2-2 is welded to one end of the water inlet fixing plate 2-1, and the other end is welded to the water outlet fixing plate 2-3. The other end of the water inlet fixing plate 2-1 is connected to the water inlet 1-1 by bolts 2-4. The number of water inlets 2-2 is consistent with the number of stacked discs 4. The upper edge of each water inlet 2-2 is kept inclined upward, consistent with the water inlet path. This can reduce the resistance loss of water inlet and maintain smooth flow, without generating eddies or turbulence, and the water distribution is more uniform.

[0029] The stacked plate 4 includes an outer stacked plate 4-1 and an inner stacked plate 4-2.

[0030] The water distribution assembly 3 includes a water distribution top plate 3-3. The water distribution top plate 3-3 and the water distribution bottom plate 3-4 below it are connected to the water distribution inner plate 3-2 on both sides via water distribution outer plates 3-1. The water distribution outer plates 3-1 are tangentially connected to the stacked plate outer plate 4-1, and the water distribution inner plate 3-2 is tangentially connected to the stacked plate inner plate 4-2. An opening is provided on the stacked plate outer plate between the two connection points. This ensures that the water flows smoothly into the stacked plate 4 through the water distribution assembly 3 without changing the flow channel cross-section, thus maximizing the stability of the flow state and helping to ensure that the stacked plate 4 forms a stable hydraulic vortex, ensuring the removal efficiency and accuracy of sand and gravel.

[0031] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The terminology used in the description of this application is only for describing specific embodiments and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings indicate similar items, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0032] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

Claims

1. A rotating tangential water inlet device for a multi-layer vortex grit chamber, characterized in that, The device includes a stacked tray, and a water distribution assembly is spirally connected to the stacked tray at a tangential angle. The end of the water distribution assembly is connected to the water inlet assembly via a water distributor. The water inlet assembly includes a water inlet, which is tapered in the vertical direction and tapered in the horizontal direction. The tapering angle is ≤15°, the tapering angle is ≤10~20°, and the tapering angle is ≤20°.

2. The rotating tangential water inlet device for the multi-layer vortex grit chamber according to claim 1, characterized in that, A square hole is provided at the upper middle part of the water inlet. A sealing gasket and a cover plate are provided on the hole. The water inlet is connected to the sealing gasket and the cover plate by fixing bolts. An exhaust pipe is provided at the top of the water inlet for exhausting air.

3. The rotating tangential water inlet device for the multi-layer vortex grit chamber according to claim 1, characterized in that, The inclination angle of the bottom plate of the inlet assembly is set to 50° to 63°, and the inclination angle of its top plate is matched with the operating head difference of the multi-layer vortex grit chamber and the head above the weir.

4. The rotating tangential water inlet device for the multi-layer vortex grit chamber according to claim 1, characterized in that, The water distributor includes a water outlet. One end of the water outlet is welded to one end of the water inlet fixing plate, and the other end is welded to the water outlet fixing plate. The other end of the water inlet fixing plate is connected to the water inlet by bolts. The number of water outlets is the same as the number of stacked plates. The upper edge of each water outlet is inclined upward and is consistent with the water inlet path.

5. The rotating tangential water inlet device for a multi-layer vortex grit chamber according to claim 1, characterized in that, The stacked tray includes an outer stacked tray plate and an inner stacked tray plate.

6. The rotating tangential water inlet device for the multi-layer vortex grit chamber according to claim 1, characterized in that, The water distribution port assembly includes a water distribution port top plate, which is connected to the water distribution port bottom plate below it through the water distribution port outer side plates and the water distribution port inner side plates on both sides. The water distribution port outer side plates are tangentially connected to the stacked plate outer side plates, and the water distribution port inner side plates are tangentially connected to the stacked plate inner side plates. An opening is provided on the stacked plate outer side plate between the two connection points.

7. The rotating tangential water inlet device for a multi-layer vortex grit chamber according to claim 1, characterized in that, The inlet end of the water inlet is square to accommodate the concrete pool, and its height is determined according to the water level in the inlet channel.

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