A short flow prevention cover plate for a multi-layer spiral flow grit chamber

Abstract

This utility model discloses a short-flow prevention cover for a multi-layer vortex grit chamber, comprising a stacked disc assembly. The top of the stacked disc assembly is provided with a short-flow prevention cover. The bottom outer edge of the short-flow prevention cover is provided with a gap between it and the upper wall of the first stacked disc of the stacked disc assembly to ensure smooth water discharge from the first stacked disc. The short-flow prevention cover is suspended on a fixed support above it by an adjustable hanger. The fixed support is connected to a fixed support of the stacked disc assembly, which is fixed to the side wall of the concrete tank by brackets. By setting the short-flow prevention cover on the top of the stacked disc assembly, the gap between the bottom edge of the short-flow prevention cover and the upper surface of the first stacked disc in the inner stacked disc assembly is adjusted to prevent the influent from flowing directly into the clear water zone, thereby separating the inner turbid water zone from the outer clear water zone and ensuring grit removal efficiency.

Description

Technical Field

[0001] This utility model relates to a short-flow prevention cover for a multi-layer vortex grit chamber, and particularly to the field of wastewater treatment technology. Background Technology

[0002] In wastewater treatment, multi-layer vortex grit chambers are often used as pretreatment units, primarily to remove sand and gravel from raw water. These chambers utilize flow guiding components to evenly distribute water tangentially across the surfaces of the various layers of discs, creating a vortex. Under the influence of gravity and centrifugal force, sand and gravel settle onto the surfaces of the discs. Simultaneously, the swirling action of the vortex causes the settled sand particles to rapidly converge at the central holes of the discs, eventually accumulating in the sand storage area at the bottom of the equipment. The treated wastewater then flows out through the overflow weir, thus achieving the removal of sand particles from the wastewater. However, the following problems often arise during actual operation:

[0003] In ideal operation, the stacked discs inside the multi-layer vortex grit chamber divide the water in the chamber into two parts: an outer clear water zone and an inner turbid water zone. The clear water zone and the turbid water zone are connected at the bottom. In the clear water zone near the chamber wall, the water flows upward, while in the turbid water zone near the center of the chamber, the water flows downward. However, in actual operation, the turbid water zone inside the stacked discs may experience upward flow due to the disturbance of incoming water, resulting in short-circuiting. Furthermore, the deposited silt and sand may be disturbed and floated up again due to the water flow or may fail to settle. Utility Model Content

[0004] This invention provides a short-flow prevention cover for a multi-layer vortex grit chamber to overcome the defect in the prior art where short-flow of ash occurs in the turbid water zone inside the stacked plate assembly due to inlet water disturbance.

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

[0006] This utility model discloses a short-flow prevention cover for a multi-layer vortex grit chamber, including a stacked plate assembly. The top of the stacked plate assembly is provided with a short-flow prevention cover. The bottom outer edge of the short-flow prevention cover is provided with a gap between the upper wall of the first stacked plate of the stacked plate assembly to ensure smooth water discharge from the first stacked plate. The short-flow prevention cover is suspended on a fixed support located above it by an adjustable hanger. The fixed support is connected to a fixed support of the stacked plate assembly. The fixed support of the stacked plate assembly is fixed to the side wall of the concrete tank by brackets.

[0007] Furthermore, the anti-short-flow cover plate includes a frustum-shaped cover plate, with at least two fixed lifting lugs evenly distributed on the upper surface of the frustum-shaped cover plate, and a central ring welded to the top of the frustum-shaped cover plate to enhance the stability of the frustum-shaped cover plate and reserve a channel for the installation, inspection and maintenance of the submersible sand pump.

[0008] Furthermore, the adjustable hanger includes a fixed hanger rod, an adjusting screw rod is provided above the fixed hanger rod, and a stainless steel screw rod is provided at the bottom of the fixed hanger rod. The adjusting screw rod passes through a reserved hole provided on the fixed bracket, and the position of the adjusting screw rod is adjusted and fixed by rotating the fixing nut.

[0009] Furthermore, a stainless steel plate is provided at the bottom of the fixed lifting lug and welded to the upper surface of the frustum-shaped cover plate. A fixed round steel bar is welded to the stainless steel plate, and a transverse opening is provided at the upper part of the fixed round steel bar.

[0010] Furthermore, the end of the stainless steel screw is provided with a stainless steel pin for preventing it from retracting.

[0011] Furthermore, the transverse opening allows the stainless steel screw to pass through for fixing the adjustable hanger. The bottom of the fixed hanger is provided with a groove, and the vertical groove is provided with a round hole for the stainless steel screw to pass through. The anti-short flow cover is inserted into the groove at the bottom of the fixed hanger through the fixed lug.

[0012] Furthermore, the adjustment range of the adjusting screw is 80mm to adapt to changes in the water volume processed by the stacked disc assembly.

[0013] The beneficial effects achieved by this utility model are as follows: the gap between the bottom edge of the anti-short-flow cover and the upper surface of the first layer of the internal stacked disc assembly is calculated according to the water treatment capacity of the stacked discs to meet the basic water discharge requirements. At the same time, the gap is adjustable through a special structural design, with an adjustment range of 80mm, to adapt to changes in the water treatment capacity of the stacked discs without affecting the water distribution and treatment efficiency of the stacked discs. It also avoids the reduction in sand removal efficiency caused by changes in the flow pattern and direction of the turbid water zone in the center of the stacked disc assembly. The anti-short-flow cover has an opening in the center to meet the requirements for installation, inspection, and maintenance of the submersible sand lifting pump. 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 structure of the anti-short-flow cover of this utility model;

[0017] Figure 3 This is a structural schematic diagram of the adjustable hanger of this utility model.

[0018] In the diagram: 1. Anti-short-flow cover; 1-1. Frustum-shaped cover; 1-2. Fixed lifting lug; 1-3. Central ring; 2. Adjustable hanger; 2-1. Fixed lifting rod; 2-2. Stainless steel screw; 2-3. Stainless steel pin; 2-4. Adjusting screw; 2-5. Fixed nut; 3. Fixed bracket; 4. Stacking tray assembly fixed bracket; 5. Bracket; 6. Concrete tank body; 7. Stacking tray assembly. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] like Figure 1-3 As shown, a short-flow prevention cover for a multi-layer vortex grit chamber includes a stacked disc assembly 7. The top of the stacked disc assembly 7 is provided with a short-flow prevention cover 1. The bottom outer edge of the short-flow prevention cover 1 is provided with a gap between it and the upper wall of the first layer of stacked discs in the stacked disc assembly 7 to ensure smooth water discharge from the first layer of stacked discs. The short-flow prevention cover 1 is suspended on a fixed support 3 located above it by an adjustable hanger 2. The fixed support 3 is connected to a fixed support 4 of the stacked disc assembly. The fixed support 4 of the stacked disc assembly is fixed to the side wall of the concrete tank body 6 by brackets 5.

[0022] The anti-short-flow cover 1 includes a frustum-shaped cover 1-1, fixed lifting lugs 1-2, and a central ring 1-3. At least two fixed lifting lugs 1-2 are evenly distributed on the upper surface of the frustum-shaped cover 1-1. A stainless steel plate is welded to the bottom of each fixed lifting lug 1-2 and welded to the upper surface of the frustum-shaped cover 1-1. A fixed round steel bar is welded to the stainless steel plate, and a transverse opening is provided at the top of the fixed round steel bar for fixing it to the adjustable hanger 2 via stainless steel screws 2-2. The central ring 1-3 is located at the top of the frustum-shaped cover 1-1 and is welded to it. It is used to enhance the structural stability of the frustum-shaped cover 1-1 and to provide a passage for the installation, maintenance, and repair of the submersible sand pump.

[0023] The adjustable hanger 2 includes a fixed hanger 2-1, a stainless steel screw 2-2, a stainless steel pin 2-3, an adjusting screw 2-4, and a fixing nut 2-5. The fixed hanger 2-1 is positioned below the adjusting screw 2-4. The bottom of the fixed hanger 2-1 has a groove, and a round hole perpendicular to the groove is provided for the stainless steel screw 2-2 to pass through. The anti-short-flow cover 1 can be inserted into the groove at the bottom of the fixed hanger 2-1 via the fixed lug 1-2. The stainless steel screw 2-2 passes through both the stainless steel screw 2-2 and the pre-drilled round hole on the fixed lug 1-2. A stainless steel pin 2-3 is provided at one end of the stainless steel screw 2-2, thus connecting the anti-short-flow cover 1 to the adjustable hanger 2. The fixed bracket 3 has a pre-drilled hole. The adjusting screw 2-4 passes through the pre-drilled hole into the fixed bracket 3, and its position is adjusted and fixed by the fixing nut 2-5. The adjustment range is 80mm to accommodate changes in the water volume treated by the stacked discs without affecting the water distribution and treatment efficiency of the stacked discs.

[0024] 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.

[0025] 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.

[0026] 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 short-flow prevention cover for a multi-layer vortex grit chamber, characterized in that, The device includes a stacking tray assembly. The top of the stacking tray assembly is provided with a short-flow prevention cover. The bottom outer edge of the short-flow prevention cover is provided with a gap between it and the upper wall of the first stacking tray of the stacking tray assembly to ensure smooth water discharge from the first stacking tray. The short-flow prevention cover is suspended on a fixed support located above it by an adjustable hanger. The fixed support is connected to a fixed support of the stacking tray assembly. The fixed support of the stacking tray assembly is fixed to the side wall of the concrete tank by brackets.

2. The anti-short-flow cover plate for a multi-layer vortex grit chamber according to claim 1, characterized in that, The anti-short flow cover plate includes a frustum-shaped cover plate, with at least two fixed lifting lugs evenly distributed on the upper surface of the frustum-shaped cover plate. A central ring is welded to the top of the frustum-shaped cover plate to enhance its stability and to reserve a passage for the installation, inspection and maintenance of the submersible sand pump.

3. The anti-short-flow cover plate for a multi-layer vortex grit chamber according to claim 2, characterized in that, The adjustable hanger includes a fixed hanger rod, an adjusting screw rod is provided above the fixed hanger rod, and a stainless steel screw rod is provided at the bottom of the fixed hanger rod. The adjusting screw rod passes through a reserved hole provided on the fixed bracket, and the position of the adjusting screw rod is adjusted and fixed by rotating the fixing nut.

4. The anti-short-flow cover plate for a multi-layer vortex grit chamber according to claim 3, characterized in that, The bottom of the fixed lifting lug is provided with a stainless steel plate and welded to the upper surface of the frustum-shaped cover plate. A fixed round steel bar is welded to the stainless steel plate, and a horizontal opening is provided on the upper part of the fixed round steel bar.

5. The anti-short-flow cover plate for a multi-layer vortex grit chamber according to claim 3, characterized in that, The end of the stainless steel screw is provided with a stainless steel pin for preventing it from retracting.

6. The anti-short-flow cover for a multi-layer vortex grit chamber according to claim 4, characterized in that, The transverse opening allows the stainless steel screw to pass through for fixing the adjustable hanger. The bottom of the fixed hanger is provided with a groove, and the vertical groove is provided with a round hole for the stainless steel screw to pass through. The anti-short flow cover is inserted into the groove at the bottom of the fixed hanger through the fixed lug.

7. The anti-short-flow cover for a multi-layer vortex grit chamber according to claim 3, characterized in that, The adjustment range of the adjusting screw is 80mm to adapt to changes in the water volume processed by the stacked disc assembly.

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