Steady flow device and sewage treatment system

Abstract

The present invention provides a flow stabilizing device and a sewage treatment system. The flow stabilizing device includes a swirl flow limiting valve and an overflow container. The overflow container has an overflow area and a water storage area. The overflow area is communicated with the swirl flow limiting valve to obtain the liquid discharged from the swirl flow limiting valve. The liquid in the overflow area can overflow into the water storage area. An overflow outlet is provided on the side wall of the overflow container, and the overflow outlet is communicated with the overflow area so that the liquid in the overflow area is discharged from the overflow outlet out of the overflow container. The flow stabilizing device of the present invention regulates the liquid flow rate flowing through the flow stabilizing device through the swirl flow limiting valve and the overflow container, so that the liquid flow rate discharged from the overflow outlet is constant and not affected by the liquid level of the upstream equipment of the swirl flow limiting valve.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and particularly to a flow stabilizing device and a sewage treatment system. Background Art

[0002] Before sewage enters the sewage treatment equipment, it first passes through an adjustment tank to adjust the water volume and water quality of the sewage. Then, a water pump is used to flow the sewage in the adjustment tank into the sewage treatment equipment at a relatively balanced flow rate. However, since the lift of the water pump needs to meet the lift required for the lowest water level in the adjustment tank to rise, and the flow rate of the water pump increases as the lift decreases, during the process of the sewage in the adjustment tank falling from a high liquid level to a low liquid level, the actual flow rate of the water pump is greater than the required flow rate of the sewage treatment equipment, thereby causing a water volume impact load on the sewage treatment equipment. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an embodiment of the present invention provides a flow stabilizing device. The flow stabilizing device controls the liquid flow rate flowing through the flow stabilizing device through a swirl flow limiting valve and an overflow container, so that the liquid flow rate discharged from the overflow outlet is constant and is not affected by the liquid level of the upstream equipment of the swirl flow limiting valve.

[0004] An embodiment of the present invention also provides a sewage treatment system.

[0005] The flow stabilizing device according to the embodiment of the present invention includes:

[0006] A swirl flow limiting valve;

[0007] An overflow container, which has an overflow area and a water storage area. The overflow area is communicated with the swirl flow limiting valve to obtain the liquid discharged from the swirl flow limiting valve. The liquid in the overflow area can overflow into the water storage area. An overflow outlet is provided on the side wall of the overflow container, and the overflow outlet is communicated with the overflow area, so that the liquid in the overflow area is discharged from the overflow outlet out of the overflow container.

[0008] The flow stabilizing device according to the embodiment of the present invention first preliminarily limits the flow rate and stabilizes the flow of the flowing liquid through the swirl flow limiting valve, so that the liquid enters the overflow container at a relatively constant flow rate. The overflow container further limits the flow rate and stabilizes the flow of the flowing liquid, so that the liquid in the overflow area is discharged from the overflow outlet at a relatively high-precision constant flow rate. The remaining liquid in the overflow area that exceeds the limited flow rate at the overflow outlet will enter the water storage area for storage to avoid affecting the constant flow rate state at the overflow outlet. At the same time, the flow rate limitation of the flowing liquid by the swirl flow limiting valve and the overflow container is not affected by the liquid level change and fluctuation of the upstream equipment.

[0009] In some embodiments, the overflow container includes:

[0010] A horizontal partition plate, an overflow area is formed above the horizontal partition plate, and a water storage area is formed below the horizontal partition plate;

[0011] An overflow weir, the overflow weir is arranged on the horizontal partition plate, and the overflow weir surrounds to form a drop hole, and the drop hole communicates the overflow area and the water storage area;

[0012] A drain port, the drain port communicates with the water storage area.

[0013] In some embodiments, the overflow container further has a water inlet area, a scum area and a water distribution area that are sequentially separated in the horizontal direction. The water inlet area communicates with the swirl flow limiting valve. The top of the scum area communicates with the top of the water inlet area, the bottom of the scum area communicates with the bottom of the water distribution area, and the water distribution area communicates with the overflow area.

[0014] In some embodiments, the flow stabilizing device further includes an adjusting member, the adjusting member stops at the overflow outlet and is movable relative to the overflow outlet in the vertical direction to adjust the overflow height of the liquid in the overflow area at the overflow outlet.

[0015] In some embodiments, the adjusting member is a triangular weir plate; and / or

[0016] The flow stabilizing device further includes a water collecting container, the water collecting container is connected to the overflow container, and the inner cavity of the water collecting container communicates with the overflow outlet, and the water collecting container is provided with a water outlet.

[0017] In some embodiments, the swirl flow limiting valve includes:

[0018] A valve barrel, the bottom of the valve barrel is provided with an outlet of the swirl flow limiting valve;

[0019] A sealing plate, the sealing plate is arranged on the top of the valve barrel to seal the top barrel opening of the valve barrel, and the sealing plate is provided with an air hole;

[0020] A water distribution pipe, the water distribution pipe is arranged on the valve barrel and extends tangentially along the valve barrel for supplying liquid to the inside of the valve barrel. The water distribution pipe is at least two, and at least two water distribution pipes are arranged at intervals along the circumferential direction of the valve barrel.

[0021] In some embodiments, the water distribution pipe has a valve and a pressure gauge. The valve is used to adjust the flow rate of the water distribution pipe, and the pressure gauge is used to display the liquid pressure in the water distribution pipe.

[0022] In some embodiments, the valve barrel includes a cylindrical section and a conical section. The water distribution pipe is arranged on the cylindrical section. One end with a larger diameter of the conical section is connected to the bottom end of the cylindrical section, and the outlet of the swirl flow limiting valve is arranged at one end with a smaller diameter of the conical section.

[0023] The sealing plate has an air inlet pipe extending in the vertical direction, and the lumen of the air inlet pipe forms the air hole.

[0024] In some embodiments, the swirl flow limiting valve further includes a water inlet pipe which has a water inlet. At least part of the water inlet pipe is annular and surrounds the outer periphery of the valve barrel, and the water distribution pipe is connected between the water inlet pipe and the valve barrel.

[0025] The sewage treatment system according to an embodiment of the present invention includes:

[0026] A regulating tank;

[0027] A flow stabilizing device, which is the flow stabilizing device described in any one of the above embodiments. The swirl flow limiting valve is communicated with the regulating tank to obtain the liquid discharged from the regulating tank. The overflow container is provided with a drain port communicating with the water storage area, and the drain port is communicated with the regulating tank;

[0028] Sewage treatment equipment, which is communicated with the overflow outlet to obtain the liquid discharged from the overflow outlet.

[0029] The sewage treatment system according to an embodiment of the present invention uses the flow stabilizing device according to an embodiment of the present invention to stabilize the sewage flow between the regulating tank and the sewage treatment equipment, so that the sewage flow entering the sewage treatment equipment is constant and not affected by the change and fluctuation of the sewage level in the regulating tank, avoiding the water volume impact load on the sewage treatment equipment. At the same time, the sewage in the water storage area returns to the regulating tank through the drain port, avoiding the sewage volume in the water storage area exceeding the limit value and affecting the flow stabilizing effect of the flow stabilizing device, enabling the sewage treatment system to operate continuously and for a long time. Description of the Drawings

[0030] Figure 1 is the top view of the flow stabilizing device according to an embodiment of the present invention;

[0031] Figure 2 is Figure 1 the sectional view taken along line A-A of the flow stabilizing device in

[0032] Figure 3 is Figure 1 the sectional view taken along line B-B of the flow stabilizing device in

[0033] Figure 4 is Figure 1 the sectional view taken along line C-C of the flow stabilizing device in

[0034] Figure 5 is Figure 1 an enlarged schematic view of part D in

[0035] Reference numerals:

[0036] 1. Swirl flow limiting valve; 11. Valve barrel; 111. Cylindrical section; 112. Conical section; 12. Sealing plate; 121. Air inlet pipe; 13. Water distribution pipe; 131. Valve; 132. Pressure gauge; 14. Water inlet pipe; 141. Water inlet; 2. Overflow container; 21. Overflow area; 22. Water storage area; 23. Overflow outlet; 24. Horizontal partition; 25. Overflow weir; 26. Water inlet area; 27. Scum area; 28. Water distribution area; 29. Drain outlet; 3. Adjusting member; 4. Water collection container; 41. Water outlet. Detailed implementation manners

[0037] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] Reference is made below to Figures 1 - 5 describe a steady flow device and a sewage treatment system according to an embodiment of the present invention.

[0039] As Figures 1 - 5 shown, the steady flow device of the embodiment of the present invention includes a swirl flow limiting valve 1 and an overflow container 2.

[0040] The overflow container 2 has an overflow area 21 and a water storage area 22. The overflow area 21 is communicated with the swirl flow limiting valve 1 to obtain the liquid discharged from the swirl flow limiting valve 1. The liquid in the overflow area 21 can overflow into the water storage area 22. An overflow outlet 23 is provided on the side wall of the overflow container 2, and the overflow outlet 23 is communicated with the overflow area 21, so that the liquid in the overflow area 21 is discharged from the overflow outlet 23 out of the overflow container 2.

[0041] Specifically, as Figures 1 - 5 shown, the interior of the overflow container 2 includes a separated overflow area 21 and a water storage area 22. The overflow area 21 is communicated with the swirl flow limiting valve 1 for obtaining the liquid discharged from the swirl flow limiting valve 1. An overflow outlet 23 is provided on the side wall of the overflow container 2, and the overflow outlet 23 is communicated with the overflow area 21, so that the liquid in the overflow area 21 is discharged from the overflow outlet 23 out of the overflow container 2 at a constant flow rate. The remaining liquid in the overflow area 21 exceeding the defined flow rate at the overflow outlet 23 overflows into the water storage area 22. Preferably, the overflow outlet 23 is in the shape of a triangular weir. Since the overflow water volume of the triangular weir is only related to the water head above the weir, the liquid in the overflow area 21 can be discharged from the overflow outlet 23 at a constant flow rate through the overflow outlet 23.

[0042] The flow stabilizing device according to the embodiment of the present invention first preliminarily limits the flow rate and stabilizes the flow of the liquid flowing through by means of a swirl flow limiting valve, so that the liquid enters the overflow container at a relatively constant flow rate. The overflow container further limits the flow rate and stabilizes the flow of the liquid flowing through, so that the liquid in the overflow area is discharged from the overflow outlet at a constant flow rate with higher precision. The remaining liquid in the overflow area that exceeds the limited flow rate at the overflow outlet will enter the water storage area for storage to avoid affecting the constant flow state at the overflow outlet. At the same time, the flow rate limitation of the liquid flowing through by the swirl flow limiting valve and the overflow container is not affected by the liquid level change and fluctuation of the upstream equipment.

[0043] In some embodiments, the overflow container 2 includes a horizontal partition 24, an overflow weir 25 and a drain port 29. An overflow area 21 is formed above the horizontal partition 24, and a water storage area 22 is formed below the horizontal partition 24. The overflow weir 25 is arranged on the horizontal partition 24, and the overflow weir 25 surrounds to form a drop hole, and the drop hole communicates the overflow area 21 and the water storage area 22. The drain port 29 communicates with the water storage area 22.

[0044] As Figures 1 - 5 shown, the overflow container 2 is preferably an overflow tank with an open top. An overflow outlet 23 is provided on the left side wall of the overflow container 2, and a container inlet is provided on the right side wall of the overflow container 2. The container inlet is connected to the swirl flow limiting valve 1 through a pipeline for obtaining the liquid discharged from the swirl flow limiting valve 1.

[0045] A horizontal partition 24 is provided in the overflow container 2. The horizontal partition 24 divides the inner cavity of the overflow container 2 into upper and lower two-layer spaces. Among them, the upper space forms the overflow area 21, and the lower space forms the water storage area 22. An upwardly extending overflow weir 25 is provided on the horizontal partition 24. The overflow weir 25 is preferably set as a rectangle and surrounds to form a drop hole. The drop hole extends in the up and down direction and penetrates through the horizontal partition 24 to communicate the overflow area 21 and the water storage area 22. Preferably, there are multiple overflow weirs 25, and the multiple overflow weirs 25 are arranged in a rectangular array. The water head height on the weir of the triangular weir-shaped overflow outlet 23 is flush with the top of the overflow weir 25, so that the remaining liquid in the overflow area 21 that exceeds the limited flow rate at the overflow outlet 23 overflows to the water storage area 22 through the overflow weir 25.

[0046] A drain port 29 is further provided on the left side wall of the overflow container 2. The drain port 29 communicates with the water storage area 22 for discharging the liquid in the water storage area 22 to avoid the water storage area 22 being full, resulting in the liquid in the overflow area 21 being unable to overflow to the water storage area 22, thereby affecting the flow rate at the overflow outlet 23.

[0047] It can be understood that the structure of the overflow container is not limited to an overflow tank. In some other embodiments, the overflow container is a tank body.

[0048] It can be understood that the overflow area and the water storage area are not limited to being separated by a horizontal partition. In some other embodiments, the overflow area and the water storage area are separated by a vertically arranged partition, and the top edge of the partition forms an overflow weir, so that the liquid in the overflow area can overflow to the water storage area through the top of the partition.

[0049] It can be understood that the overflow container is not limited to being provided with a drain port. In some other embodiments, the water storage area has a relatively large capacity, and in this case, no drain port is provided.

[0050] In some embodiments, the overflow container 2 further has a water inlet area 26, a scum area 27, and a water distribution area 28 that are sequentially separated in the horizontal direction. The water inlet area 26 is communicated with the swirl flow limiting valve 1. The top of the scum area 27 is communicated with the top of the water inlet area 26, the bottom of the scum area 27 is communicated with the bottom of the water distribution area 28, and the water distribution area 28 is communicated with the overflow area 21.

[0051] As Figure 1 and Figure 2 shown, a first partition, a second partition, and a third partition are sequentially arranged at intervals in the overflow container 2 along the direction from right to left. The first partition, the second partition, and the third partition all extend in the vertical direction and are connected between the front side wall and the rear side wall of the overflow container 2.

[0052] Among them, the first partition extends upward from the bottom surface of the overflow container 2 and has a first channel between it and the top of the overflow container 2. At the same time, a water inlet area 26 is formed between the first partition and the right side wall of the overflow container 2. The container inlet is located at the bottom of the right side wall of the overflow container 2 and is arranged opposite to the first partition in the left-right direction. The liquid entering the overflow container 2 from the container inlet first enters the water inlet area 26 and flows upward under the blocking of the first partition.

[0053] The second partition extends downward from the top of the overflow container 2 and has a second channel between it and the bottom surface of the overflow container 2. The bottom of the second partition is located between the top of the first partition and the bottom surface of the overflow container 2. A scum area 27 is formed between the second partition and the first partition. The liquid in the water inlet area 26 overflows into the scum area 27 through the first channel above the first partition and then flows downward in the scum area 27. Under the blocking action of the second partition, the lighter impurities in the liquid stay on the liquid surfaces of the scum area 27 and the water inlet area 26 and cannot flow into the second channel along with the liquid. At the same time, due to the blocking action of the first partition, the liquid entering the overflow container 2 from the container inlet cannot directly enter the second channel but must pass through the water inlet area 26 and the scum area 27 to leave the lighter impurities in the liquid in the scum area 27, so as to play a certain filtering role for the liquid.

[0054] The third partition extends upward from the bottom surface of the overflow container 2 and has a third channel between it and the top of the overflow container 2. The top of the third partition is located between the bottom of the second partition and the top of the overflow container 2. A water distribution area 28 is formed between the third partition and the second partition. A horizontal partition 24 is connected between the third partition and the left side wall of the overflow container 2. The liquid enters the water distribution area 28 through the second channel and flows upward in the water distribution area 28, and then overflows into the overflow area 21 through the third channel above the third partition. Preferably, the top of the third partition is flush with the top of the overflow weir 25.

[0055] Preferably, the water distribution area 28, the overflow area 21 and the water storage area 22 have the same size in the front-back direction and are larger than the size of the water inlet area 26 in the front-back direction. The size of the scum area 27 in the front-back direction increases along the direction from right to left. Preferably, the horizontal projection of the scum area 27 is trapezoidal. The flow velocity and pressure of the liquid in the water inlet area 26 decrease when passing through the scum area 27, and then enter the water distribution area 28 more gently. The water distribution area 28 makes the liquid smoother and enters the overflow area 21 evenly. On the one hand, it avoids the liquid level fluctuation in the overflow area 21 from affecting the liquid discharge from the overflow outlet 23 at a constant flow rate. On the other hand, it avoids the liquid level fluctuation in the overflow area 21, which may cause additional liquid to enter the drop hole due to the liquid level sloshing and enter the water storage area 22, affecting the utilization rate of the water storage area 22.

[0056] It can be understood that the structure of the overflow container is not limited to the structure as Figure 1 shown. In some other embodiments, the overflow container does not have a water inlet area, a scum area and a water distribution area. The liquid entering the overflow container from the container inlet directly enters the overflow area. Or the overflow container does not have a water inlet area and a first partition. The container inlet is provided in the middle of the right side wall of the overflow container and is arranged opposite to the second partition. The second partition blocks the lighter impurities and blocks the liquid from directly entering the water distribution area.

[0057] In some embodiments, the flow stabilization device of the embodiment of the present invention further includes an adjusting member 3. The adjusting member 3 stops at the overflow outlet 23 and can move vertically relative to the overflow outlet 23 to adjust the overflow height of the liquid in the overflow area 21 at the overflow outlet 23.

[0058] Such as Figures 1 - 5As shown in the figure, an adjusting member 3 is provided on the left side wall of the overflow container 2. The adjusting member 3 abuts against the overflow outlet 23 and can move vertically relative to the overflow outlet 23. Under the abutting action of the adjusting member 3, the liquid discharged from the overflow outlet 23 needs to overflow from above the adjusting member 3. Therefore, by adjusting the position of the adjusting member 3 in the vertical direction, the overflow height of the liquid in the overflow area 21 at the overflow outlet 23 can be adjusted, thereby adjusting the flow rate of the liquid discharged at the overflow outlet 23. When the adjusting member 3 is at any height position, the head height on the weir is flush with the top surface of the overflow weir 25, so that the remaining liquid in the overflow area 21 exceeding the defined flow rate at the overflow outlet 23 overflows into the water storage area 22.

[0059] Preferably, the adjusting member 3 is a triangular weir plate. More preferably, the adjusting member 3 is a 90° triangular weir plate.

[0060] Preferably, the overflow outlet 23 is a rectangular opening. In the projection plane in the vertical direction, the projection of the horizontal partition 24 is located below the projection of the overflow outlet 23, and the projection of the top surface of the overflow weir 25 is located in the middle of the projection of the overflow outlet 23. Two card slots are provided on the left side wall of the overflow container 2. The card slots extend in the vertical direction, and the two card slots are arranged opposite to each other in the front-rear direction. The front end of the adjusting member 3 is stuck in the front card slot, and the rear end of the adjusting member 3 is stuck in the rear card slot to limit the position of the adjusting member 3 in the up-down direction through the two card slots. When it is necessary to change the position of the adjusting member 3 in the up-down direction, a vertical pulling force is applied to the adjusting member 3 manually to make the adjusting member 3 move in the up-down direction in the two card slots, thereby changing the position of the adjusting member 3. When the pulling force is removed, the position of the adjusting member 3 is fixed. At the same time, the card slot also applies a rightward pressure to the adjusting member 3 to make the right end surface of the adjusting member 3 abut against the left end surface of the overflow container 2, preventing liquid from flowing out between the adjusting member 3 and the left end surface of the overflow container 2.

[0061] It can be understood that the installation structure of the adjusting member is not limited to the structure as Figure 5 shown. In some other embodiments, the adjusting member is a gate plate embedded in the wall surface of the overflow container and moves in the up-down direction under the drive of, for example, a screw or a telescopic cylinder.

[0062] In some embodiments, the steady flow device further includes a water collecting container 4. The water collecting container 4 is connected to the overflow container 2, and the inner cavity of the water collecting container 4 is communicated with the overflow outlet 23. The water collecting container 4 is provided with a water outlet 41.

[0063] As Figure 1 and Figure 2As shown, the water collecting container 4 is preferably an open-topped water collecting tank. Preferably, the water collecting tank is fixedly connected to the left end face of the overflow container 2, which can be integrally connected or welded. The overflow outlet 23 communicates with the inner cavity of the water collecting container 4. The liquid discharged from the overflow outlet 23 enters the inner cavity of the water collecting container 4. The water collecting container 4 is provided with a water outlet 41, and the liquid in the water collecting container 4 is discharged through the water outlet 41. The water collecting container 4 functions to receive the liquid discharged from the overflow outlet 23 and can discharge the liquid at the same flow rate as that at the overflow outlet 23 through the water outlet 41.

[0064] It can be understood that the flow stabilizing device is not limited to having a water collecting container. In some other embodiments, the flow stabilizing device does not have a water collecting container. A drain pipe is provided on the left end face of the overflow container. The pipe wall of the drain pipe surrounds the overflow outlet and the adjusting member. The liquid discharged from the overflow outlet directly enters the drain pipe. Preferably, the drain pipe is made of a transparent material or is provided with an observation window to facilitate observing the position of the adjusting member.

[0065] In some embodiments, the swirl flow limiting valve 1 includes a valve barrel 11, a sealing plate 12, and a water distribution pipe 13. The bottom of the valve barrel 11 is provided with an outlet of the swirl flow limiting valve 1. The sealing plate 12 is arranged on the top of the valve barrel 11 to close the top barrel opening of the valve barrel 11. The sealing plate 12 is provided with air holes. The water distribution pipe 13 is arranged on the valve barrel 11 and extends tangentially along the valve barrel 11 for supplying liquid to the inside of the valve barrel 11. There are at least two water distribution pipes 13, and at least two water distribution pipes 13 are arranged at intervals along the circumferential direction of the valve barrel 11.

[0066] As Figure 1 and Figure 2 shown, the valve barrel 11 is arranged vertically. The top barrel opening of the valve barrel 11 is closed by the sealing plate 12. A flange is provided at the bottom barrel opening of the valve barrel 11 to form an outlet of the swirl flow limiting valve 1. The outlet of the swirl flow limiting valve 1 is communicated with the container inlet of the overflow container 2 through a pipeline. A central part of the sealing plate 12 is provided with an air hole penetrating the sealing plate 12 in the up-down direction so that gas can enter the valve barrel 11 through the air hole. Preferably, the air hole is arranged in the extending direction of the center line of the valve barrel 11. At least two water distribution pipes 13, preferably eight, are arranged on the top of the valve barrel 11. The eight water distribution pipes 13 are arranged at intervals along the circumferential direction of the valve barrel 11. Preferably, the eight water distribution pipes 13 are evenly arranged along the circumferential direction of the valve barrel 11. Each water distribution pipe 13 communicates with the inside of the valve barrel 11 and extends tangentially along the valve barrel 11 for supplying liquid to the inside of the valve barrel 11.

[0067] Liquid enters the valve barrel 11 through the water distribution pipe 13. When the flow rate of the liquid is small, the liquid passes through the valve barrel 11 in the form of gravity flow, then enters the overflow container 2 through the outlet of the swirl flow limiting valve 1 and the pipeline, and under the flow limiting and flow stabilizing effects of the overflow area 21 and the water storage area 22, it enters the water collecting container 4 at a constant flow rate through the overflow outlet 23 and is discharged from the water outlet 41 at a constant flow rate. When the liquid flow rate of the water distribution pipe 13 is large, air outside the swirl flow limiting valve 1 enters the valve barrel 11 through the air holes, blocking the water flow formed by the liquid to form an axisymmetric swirl flow, and forming a high-speed tangential velocity in the valve barrel 11. At the same time, an air column is formed in the middle of the valve barrel 11 to reduce the cross-sectional area of the water flow at the outlet of the swirl flow limiting valve 1 and block most of the water outlet, thereby realizing the flow limiting and flow stabilizing effects on the liquid. The liquid discharged from the swirl flow limiting valve 1 is further flow limited and flow stabilized after entering the overflow container 2, then enters the water collecting container 4 at a constant flow rate through the overflow outlet 23 and is discharged from the water outlet 41 at a constant flow rate.

[0068] At least two water distribution pipes 13 are arranged at intervals along the circumferential direction of the valve barrel 11. On the one hand, it can improve the processing capacity of the swirl flow limiting valve 1 for the liquid, and on the other hand, it makes the water inlet of the valve barrel 11 uniform, which is convenient for generating swirl flow.

[0069] It can be understood that the swirl flow limiting valve is not limited to having at least two water distribution pipes. In some other embodiments, the swirl flow limiting valve only has one water distribution pipe.

[0070] In some embodiments, the water distribution pipe 13 is provided with a valve 131 and a pressure gauge 132. The valve 131 is used to adjust the flow rate of the water distribution pipe 13, and the pressure gauge 132 is used to display the liquid pressure in the water distribution pipe 13.

[0071] As Figure 1 shown, each water distribution pipe 13 is provided with a corresponding valve 131 and a pressure gauge 132. The valve 131 is used to adjust the flow rate of the water distribution pipe 13, and the pressure gauge 132 is used to display the liquid pressure in the water distribution pipe 13. Thus, through the valve 131 and the pressure gauge 132 on each water distribution pipe 13, all the water distribution pipes 13 supply liquid into the valve barrel 11 at the same flow rate and pressure, so that the water inlet of the valve barrel 11 is uniform and it is convenient to generate swirl flow.

[0072] In some embodiments, the swirl flow limiting valve 1 further includes a water inlet pipe 14. The water inlet pipe 14 has a water inlet 141. At least part of the water inlet pipe 14 is annular and surrounds the outer periphery of the valve barrel 11. The water distribution pipe 13 is connected between the water inlet pipe 14 and the valve barrel 11.

[0073] As Figure 1 and Figure 2As shown, a part of the water inlet pipe 14 is arranged in a ring shape and surrounds the outer periphery of the valve barrel 11. Preferably, the ring-shaped part of the water inlet pipe 14 is arranged as a polygon-shaped ring. The water distribution pipe 13 is connected between the ring-shaped part of the water inlet pipe 14 and the valve barrel 11. Another part of the water inlet pipe 14 is an interface provided on the ring-shaped part to form a water inlet 141. Liquid enters the water inlet pipe 14 from the water inlet 141 and circulates within the ring-shaped part. Meanwhile, part of the liquid enters the valve barrel 11 through at least two water distribution pipes 13. The water inlet pipe 14 facilitates the connection of the two water distribution pipes 13 with the upstream equipment and also serves to fix the water distribution pipes 13.

[0074] In some embodiments, the valve barrel 11 includes a cylindrical section 111 and a conical section 112. The water distribution pipe 13 is provided on the cylindrical section 111. The larger-diameter end of the conical section 112 is connected to the bottom end of the cylindrical section 111, and the smaller-diameter end of the conical section 112 is provided with the outlet of the swirl flow limiting valve 1.

[0075] As Figure 2 shown, the valve barrel 11 includes a cylindrical section 111 and a conical section 112. The top barrel opening of the cylindrical section 111 is closed by a sealing plate 12. The bottom end of the cylindrical section 111 is connected to the larger-diameter end of the conical section 112. The diameter of the conical section 112 decreases in the direction from top to bottom. The smaller-diameter end of the conical section 112 is provided with the outlet of the swirl flow limiting valve 1. In other words, the bottom end of the conical section 112 is provided with the outlet of the swirl flow limiting valve 1. The water distribution pipe 13 is connected to the cylindrical section 111.

[0076] In some embodiments, the sealing plate 12 has an air inlet pipe 121 extending in the vertical direction, and the lumen of the air inlet pipe 121 forms an air hole.

[0077] As Figure 1 and Figure 2 shown, the sealing plate 12 includes a plate body and an air inlet pipe 121. The plate body is horizontally arranged and closes the top barrel opening of the cylindrical section 111. An interface is provided in the middle of the plate body, and the interface is connected to the air inlet pipe 121 to form an air hole, thereby facilitating the formation of an air column in the valve barrel 11.

[0078] As Figures 1 - 5 shown, the sewage treatment system of the embodiment of the present invention includes an adjustment tank, a flow stabilizing device, and sewage treatment equipment.

[0079] The flow stabilizing device is the flow stabilizing device of the embodiment of the present invention. The swirl flow limiting valve 1 is communicated with the adjustment tank to obtain the liquid discharged from the adjustment tank. The overflow container 2 is provided with a drain port 29 communicating with the water storage area 22, and the drain port 29 is communicated with the adjustment tank. The sewage treatment equipment is communicated with the overflow outlet 23 to obtain the liquid discharged from the overflow outlet 23.

[0080] Specifically, as Figures 1 - 5As shown, the outlet of the regulating tank (not shown in the figure) is connected to the water inlet 141 through a pipeline to discharge the sewage discharged from the regulating tank to the flow stabilization device, and successively passes through the swirl flow-limiting valve 1 and the overflow container 2 to limit the flow and stabilize the flow of the sewage, so that the sewage enters the water collection container 4 through the overflow outlet 23 at a constant flow rate and is discharged from the water outlet 41 at a constant flow rate. The water outlet 41 is connected to the inlet of a sewage treatment device (not shown in the figure) through a pipeline to supply the sewage discharged from the water outlet 41 to the sewage treatment device for sewage treatment, such as anaerobic reaction, aerobic reaction, etc. The drain outlet 29 of the overflow container 2 is connected to the regulating tank through a pipeline to supply the sewage collected and stored in the water storage area 22 back to the regulating tank, thereby preventing the water storage area 22 from being filled, resulting in the sewage in the overflow area 21 being unable to overflow into the water storage area 22, and further affecting the flow rate at the overflow outlet 23.

[0081] The sewage treatment system according to the embodiment of the present invention uses the flow stabilization device according to the embodiment of the present invention to stabilize the sewage flow rate between the regulating tank and the sewage treatment device, so that the sewage flow rate entering the sewage treatment device is constant and not affected by the change and fluctuation of the sewage liquid level in the regulating tank, avoiding the water volume impact load on the sewage treatment device. At the same time, the sewage in the water storage area returns to the regulating tank through the drain outlet, preventing the sewage volume in the water storage area from exceeding the limit value and affecting the flow stabilization effect of the flow stabilization device, enabling the sewage treatment system to operate continuously and for a long time.

[0082] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0083] In addition, the terms "first" and "second" are only used for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0084] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0086] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0087] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A steady flow device, characterized in that, Comprising: A swirl flow limiting valve (1), the swirl flow limiting valve (1) includes a valve barrel (11), a sealing plate (12) and a water distribution pipe (13). The bottom of the valve barrel (11) is provided with an outlet of the swirl flow limiting valve (1). The sealing plate (12) is arranged at the top of the valve barrel (11) to close the top barrel opening of the valve barrel (11). The sealing plate (12) is provided with air holes. The water distribution pipe (13) is arranged on the valve barrel (11) and extends tangentially along the valve barrel (11) for supplying liquid to the inside of the valve barrel (11). There are at least two water distribution pipes (13), and at least two water distribution pipes (13) are arranged at intervals along the circumferential direction of the valve barrel (11); An overflow container (2), the overflow container (2) includes a horizontal partition plate (24), an overflow weir (25) and a drain port (29). An overflow area (21) is formed above the horizontal partition plate (24), and a water storage area (22) is formed below the horizontal partition plate (24). The overflow weir (25) is arranged on the horizontal partition plate (24), and the overflow weir (25) surrounds to form a water drop hole. The water drop hole communicates the overflow area (21) and the water storage area (22). The overflow area (21) is communicated with the swirl flow limiting valve (1) to obtain the liquid discharged by the swirl flow limiting valve (1). The liquid in the overflow area (21) can overflow into the water storage area (22). An overflow outlet (23) is arranged on the side wall of the overflow container (2), and the overflow outlet (23) is communicated with the overflow area (21) so that the liquid in the overflow area (21) is discharged from the overflow outlet (23) out of the overflow container (2). The drain port (29) is communicated with the water storage area (22).

2. The steady flow device according to claim 1, characterized in that, The overflow container (2) also has a water inlet area (26), a scum area (27) and a water distribution area (28) which are sequentially separated in the horizontal direction. The water inlet area (26) is communicated with the swirl flow limiting valve (1). The top of the scum area (27) is communicated with the top of the water inlet area (26), and the bottom of the scum area (27) is communicated with the bottom of the water distribution area (28). The water distribution area (28) is communicated with the overflow area (21).

3. The steady flow device according to claim 1, characterized in that, It further includes an adjusting member (3). The adjusting member (3) stops at the overflow outlet (23) and can move vertically relative to the overflow outlet (23) to adjust the overflow height of the liquid in the overflow area (21) at the overflow outlet (23).

4. The steady flow device according to claim 3, characterized in that, The adjusting member (3) is a triangular weir plate; and / or The steady flow device further includes a water collecting container (4). The water collecting container (4) is connected to the overflow container (2), and the inner cavity of the water collecting container (4) is communicated with the overflow outlet (23). The water collecting container (4) is provided with a water outlet (41).

5. The steady flow device according to claim 1, characterized in that, The water distribution pipe (13) is provided with a valve (131) and a pressure gauge (132). The valve (131) is used to adjust the flow rate of the water distribution pipe (13), and the pressure gauge (132) is used to display the liquid pressure in the water distribution pipe (13).

6. The steady flow device according to claim 1, characterized in that The valve barrel (11) includes a cylindrical section (111) and a conical section (112). The water distribution pipe (13) is arranged on the cylindrical section (111). The larger-diameter end of the conical section (112) is connected to the bottom end of the cylindrical section (111). The smaller-diameter end of the conical section (112) is provided with the outlet of the swirl flow limiting valve (1). The sealing plate (12) has an air inlet pipe (121) extending in the vertical direction. The lumen of the air inlet pipe (121) forms the air hole.

7. The steady flow device according to claim 1, wherein The swirl flow limiting valve (1) further includes a water inlet pipe (14). The water inlet pipe (14) has a water inlet (141). At least part of the water inlet pipe (14) is annular and surrounds the outer periphery of the valve barrel (11). The water distribution pipe (13) is connected between the water inlet pipe (14) and the valve barrel (11).

8. A sewage treatment system, characterized in that, Comprising: Regulating tank; A flow stabilizing device, which is the flow stabilizing device described in any one of claims 1-7. The swirl flow limiting valve (1) is communicated with the regulating tank to obtain the liquid discharged from the regulating tank. The overflow container (2) is provided with a drain port (29) communicating with the water storage area (22), and the drain port (29) is communicated with the regulating tank; A sewage treatment device, which is communicated with the overflow outlet (23) to obtain the liquid discharged from the overflow outlet (23).

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