Uniform water distribution device for peripheral water inlet sedimentation tank

Abstract

A uniform water distribution device for a peripheral water inlet sedimentation tank comprises a water distribution channel used for being matched with the peripheral water inlet sedimentation tank, a plurality of water distribution holes are formed in the bottom of the water distribution channel, a fixing pipe is installed in each water distribution hole, a water distribution pipe is installed in each fixing pipe, and internal threads are arranged on the inner pipe wall of each fixing pipe. The outer pipe wall of the water distribution pipe is provided with an external thread used for being matched with the internal thread to install the water distribution pipe and adjust the height of the water distribution pipe, and the water distribution pipe is installed in the fixing pipe through matching of the external thread and the internal thread; and a wing nut or a rotating handle for conveniently rotating the water distribution pipe to adjust the height of the water distribution pipe is also mounted at the top of the water distribution pipe. According to the uniform water distribution device for the peripheral water inlet sedimentation tank, when the water flow of each water distribution pipe of a water distribution channel is not uniform, the water flow of the water distribution pipes can be adjusted by adjusting the heights of the water distribution pipes, so that the water inlet amounts of the water distribution pipes are the same, and uniform water distribution of the sedimentation tank is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a uniform water distribution device for a peripheral water inlet sedimentation tank. Background Art

[0002] The uniformity of water distribution in the peripheral water inlet sedimentation tank distribution channel directly affects the treatment efficiency and volume utilization of the sedimentation tank. The existing calculation of the water distribution holes of the peripheral water inlet sedimentation tank is mainly based on the orifice submerged outflow formula in hydraulics, and a number of assumptions are made at the same time:

[0003] (1) Assume that the water flow direction in the distribution channel is all horizontal and the velocity head in the vertical direction is zero;

[0004] (2) Ignore the centrifugal force of the circular motion of the water flow in the channel, consider the water flow in the distribution channel as a straight line, and regard it as a uniform open channel flow;

[0005] (3) When using open channel uniform flow calculation, the outflow along the way is ignored and the hydraulic gradient is regarded as a constant;

[0006] (4) In addition, the derivation of the orifice outflow formula itself is also based on the assumptions of steady flow, uniform flow, incompressible fluid, inviscid fluid, and neglect of gravity.

[0007] However, there are often large deviations between actual operating conditions and theoretical calculation results. Coupled with the influence of factors such as outflow along the way and water loss along the way, uneven water distribution occurs, which is manifested in reduced terminal flow velocity, no water, mud accumulation and other phenomena, ultimately leading to a deterioration in the sedimentation effect of the secondary sedimentation tank.

[0008] The existing water distribution channels adopt three design forms to achieve uniform water distribution:

[0009] First, the cross section of the water distribution channel is designed to be gradually narrowed along the direction of water flow;

[0010] Second, the water distribution holes at the bottom of the water distribution channel are designed with uneven spacing from sparse to dense;

[0011] Third, the bottom of the water distribution channel gradually forms a slope along the direction of water flow;

[0012] There are also special designs to further promote uniform water distribution, which is mainly achieved through the following ways:

[0013] (1) Reduce the outflow area of ​​the distribution channel, increase the water pressure of the distribution channel, and form a high-resistance water distribution system in the distribution channel, so that the resistance loss along the distribution channel can be ignored;

[0014] This design will reduce the water pressure in the channel when the actual water volume decreases, weakening the function of the high-resistance water distribution system;

[0015] (2) A pipeline-type water distribution mechanism is provided at the lower end of the water distribution hole. The water distribution mechanism is arranged in parallel along the periphery of the sedimentation tank. A special diversion component is provided in the water distribution mechanism to make the water flow into the tank more evenly;

[0016] The problem with this design is that the amount of water entering the water distribution mechanism along the flow direction of the distribution channel is inherently uneven;

[0017] (3) The outlet channel is located above the distribution channel. Since the liquid level in the distribution channel is lower than that in the outlet channel, the distribution channel is always filled with sewage under pressure. Thus, the water distribution of each distribution hole at the bottom of the distribution channel is more uniform through pressure water distribution.

[0018] The problem with this design is that its water distribution channel is a long sealed channel, which makes construction very difficult. Utility Model Content

[0019] The technical problem to be solved by the utility model is to provide a peripheral water inlet sedimentation tank uniform water distribution device which can adjust the water flow rate of the water distribution pipe so that the water flow rate of each water distribution pipe is the same and maintain uniform water distribution in the sedimentation tank.

[0020] The technical problem to be solved by the utility model is achieved through the following technical solutions. The utility model is a uniform water distribution device for a peripheral water inlet sedimentation tank, including a water distribution channel for cooperating with the peripheral water inlet sedimentation tank, a plurality of water distribution holes are arranged at the bottom of the water distribution channel, a fixed pipe is installed in each water distribution hole, a water distribution pipe is installed in the fixed pipe, an internal thread is arranged on the inner pipe wall of the fixed pipe, an external thread for cooperating with the internal thread to install and adjust the height of the water distribution pipe is arranged on the outer pipe wall of the water distribution pipe, and the water distribution pipe is installed in the fixed pipe through the external thread and the internal thread.

[0021] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the above-mentioned peripheral water inlet sedimentation tank uniform water distribution device, a Yuanbao nut or a rotating handle is also installed on the top of the water distribution pipe to facilitate the rotation of the water distribution pipe to adjust the height of the water distribution pipe.

[0022] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the above-mentioned peripheral water inlet sedimentation tank uniform water distribution device, an orifice groove cooperating with the ingot nut or the rotating handle is also provided at the top of the water distribution hole.

[0023] The technical problem to be solved by the utility model can be further achieved through the following technical scheme. For the uniform water distribution device for the peripheral water inlet sedimentation tank described above, the orifice groove is in an inverted cone shape.

[0024] The technical problem to be solved by the utility model can be further achieved through the following technical solutions. For the uniform water distribution device for the peripheral water inlet sedimentation tank described above, a single nut or double nut for locking the water distribution pipe is also installed on the water distribution pipe.

[0025] The technical problem to be solved by the present invention can be further achieved through the following technical scheme. For the uniform water distribution device for the peripheral water inlet sedimentation tank described above, the height of the single nut or the double nut is greater than the height of the orifice groove.

[0026] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the uniform water distribution device for the peripheral water inlet sedimentation tank described above, the length of the water distribution pipe is more than 10 cm greater than the water level height of the water distribution channel.

[0027] The technical problem to be solved by the utility model can also be further achieved through the following technical scheme. For the above-mentioned peripheral water inlet sedimentation tank uniform water distribution device, the fixed pipe and the water distribution pipe are selected from any one of a metal threaded pipe, a fiberglass threaded pipe, a self-locking UPVC threaded pipe, a self-locking PE threaded pipe, and a self-locking PP threaded pipe.

[0028] Compared with the prior art, the utility model is a uniform water distribution device for the peripheral water inlet sedimentation tank, which can achieve the following three points by raising the height of the front water distribution pipe when the amount of water flowing forward in the water distribution channel is reduced in actual engineering, or when there is little or no flow at the end:

[0029] (1) Increase water loss along the distribution pipe by adjusting the height of the distribution pipe;

[0030] (2) The height adjustment also exposes the external threads of the fixed pipe, increasing the roughness of the water pipe;

[0031] (3) When water flows from the distribution pipe to the fixed pipe, the water flow section suddenly expands, increasing local water loss;

[0032] By taking the above measures to increase local and along-the-way water losses, the utility model can balance the aforementioned assumed errors, reduce the front-end water distribution flow, and achieve overall uniform water distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural cross-sectional view of the utility model;

[0034] Figure 2 It is a structural top view of the utility model;

[0035] Figure 3 yes Figure 1 The enlarged view of point A in the middle;

[0036] Figure 4 yes Figure 1 The disassembly diagram of the enlarged view at A in the middle;

[0037] Figure 5 It is an enlarged view of the utility model for adjusting the water distribution pipe to a certain height;

[0038] Figure 6 This is a diagram of the auxiliary fixing installation of the locking nut of the utility model;

[0039] Reference numerals:

[0040] 11: sedimentation tank; 12: water distribution channel; 13: water distribution hole; 14: outlet channel; 15: guide skirt; 21: orifice groove; 22: fixing pipe; 23: water distribution pipe; 24: ingot nut; 25: locking nut. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] Reference Figure 1-6 , a peripheral water inlet sedimentation tank uniform water distribution device, including a water distribution channel 12 used to cooperate with the peripheral water inlet sedimentation tank 11, so as to solve the problem of uneven water distribution in actual projects. The peripheral water inlet sedimentation tank 11 is generally provided with a water outlet channel 14. The water distribution channel 12 is arranged on the inner side of the peripheral water inlet sedimentation tank 11 and on the outer side of the water outlet channel 14. A guide skirt 15 is also installed between the water distribution channel 12 and the water outlet channel 14 to realize the water distribution and water outlet operation of the peripheral water inlet sedimentation tank 11;

[0043] Specifically, a plurality of water distribution holes 13 are provided at the bottom of the water distribution channel 12, a fixed pipe 22 is installed in each water distribution hole 13, a water distribution pipe 23 is installed in the fixed pipe 22, an internal thread is provided on the inner pipe wall of the fixed pipe 22, and an external thread for cooperating with the internal thread to install and adjust the height of the water distribution pipe 23 is provided on the outer pipe wall of the water distribution pipe 23. The water distribution pipe 23 is installed in the fixed pipe 22 by cooperating with the internal thread, and the height of the water distribution pipe 23 can be adjusted by cooperating with the external thread and the internal thread, so as to adjust the water flow in the water distribution pipe 23 and realize uniform distribution of the water distribution amount in each water distribution pipe 23, so as to realize overall uniform water distribution by adjusting the local water distribution flow; preferably, the water distribution channel 12 is annular, and the water distribution holes 13 are evenly distributed along the circumference of the water distribution channel 12;

[0044] In order to facilitate the rotation operation of the water distribution pipe 23, a Yuanbao nut or a rotating handle 24 is installed on the top of the water distribution pipe 23 for facilitating the rotation of the water distribution pipe 23 to adjust the height of the water distribution pipe 23. An orifice groove 21 cooperating with the Yuanbao nut or the rotating handle 24 is also provided on the top of the water distribution hole 13. The upper end of the fixed pipe 22 is away from the upper surface of the bottom of the water distribution channel 12 by a Yuanbao nut or a rotating handle 24 to reserve a rotation space for the Yuanbao nut or the rotating handle 24, and when the water distribution pipe 23 is fully screwed into the fixed pipe 22, the upper end of the Yuanbao nut is flush with the upper surface of the bottom of the water distribution channel 12. Further preferably, the orifice groove 21 is inverted cone shape.

[0045] In order to ensure the reliability of the water distribution pipe 23, a single nut or double nut 25 for locking the water distribution pipe 23 is also installed on the water distribution pipe 23. When the water distribution pipe 23 is screwed upward to a greater height, the single nut or double nut 25 is used to lock and fix the water distribution pipe 23. Preferably, a sealing ring can be further configured at the lower part of the single nut or double nut 25 to ensure sealing. Further preferably, the height of the single nut or double nut 25 is greater than the height of the orifice groove 21.

[0046] Preferably, the length of the water distribution pipe 23 is greater than the water level of the water distribution channel 12 by more than 10 cm, so that the length of the water distribution pipe 23 is sufficient to meet the height adjustment of different needs and better adjust the water distribution flow.

[0047] The fixed pipe 22 and the water distribution pipe 23 are selected from any one of a metal threaded pipe, a fiberglass threaded pipe, a self-locking UPVC threaded pipe, a self-locking PE threaded pipe, and a self-locking PP threaded pipe, and the fixed pipe 22, the water distribution pipe 23, the ingot nut or the rotating handle 24, the single nut or the double nut 25 all adopt pipe threads and can be connected to each other.

[0048] In actual use, when the flow rate at the rear end of the water distribution channel 12 decreases, the water distribution pipe 23 can be rotated to make the water distribution pipe 23 present a gradient from high to low from the front end to the rear end, so as to reduce the flow rate of the front water distribution pipe 23 and increase the flow rate of the rear water distribution pipe 23, so that the flow rates of the front and rear water distribution pipes 23 are the same;

[0049] Furthermore, when the actual water inflow is uneven, some of the water distribution pipes 23 can be blocked at intervals from the beginning to the end of the water distribution channel 12, so that the water distribution of the entire channel is uniform. The blocking can be done by screwing an internal threaded plug into the upper end of the fixed pipe 22, or by screwing an external threaded pipe cap into the upper end of the water distribution pipe 23.

Claims

1. A uniform water distribution device for a peripheral water inlet sedimentation tank, characterized in that: It includes a water distribution channel for cooperating with the surrounding water inlet sedimentation tank. A plurality of water distribution holes are arranged at the bottom of the water distribution channel. A fixed pipe is installed in each water distribution hole. A water distribution pipe is installed in the fixed pipe. An internal thread is arranged on the inner pipe wall of the fixed pipe. An external thread for cooperating with the internal thread to install and adjust the height of the water distribution pipe is arranged on the outer pipe wall of the water distribution pipe. The water distribution pipe is installed in the fixed pipe by cooperating with the external thread and the internal thread.

2. The uniform water distribution device for the peripheral water inlet sedimentation tank according to claim 1 is characterized in that: A nut or a rotating handle is also installed on the top of the water distribution pipe to facilitate rotating the water distribution pipe to adjust the height of the water distribution pipe.

3. The uniform water distribution device for the peripheral water inlet sedimentation tank according to claim 2 is characterized in that: An orifice groove matched with a Yuanbao nut or a rotating handle is also arranged on the top of the water distribution hole.

4. The uniform water distribution device for the peripheral water inlet sedimentation tank according to claim 3 is characterized by: The orifice groove is in an inverted cone shape.

5. The uniform water distribution device for the peripheral water inlet sedimentation tank according to claim 3 is characterized in that: A single nut or a double nut is also installed on the water distribution pipe for locking the water distribution pipe.

6. The uniform water distribution device for the peripheral water inlet sedimentation tank according to claim 5 is characterized in that: The height of the single nut or double nut is greater than the height of the orifice groove.

7. The uniform water distribution device for the peripheral water inlet sedimentation tank according to claim 1 is characterized by: The length of the water distribution pipe is more than 10 cm greater than the water level of the water distribution channel.

8. The uniform water distribution device for a peripheral water inlet sedimentation tank according to claim 1, characterized in that: The fixed pipe and the water distribution pipe are selected from any one of a metal threaded pipe, a glass fiber reinforced plastic threaded pipe, a self-locking UPVC threaded pipe, a self-locking PE threaded pipe, and a self-locking PP threaded pipe.

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