Unpowered orifice jet type hydraulic mixing well

Abstract

The invention discloses a jet type hydraulic mixing well with unpowered orifices. The jet type hydraulic mixing well comprises an inner-layer well body, an outer-layer well body, an upper-layer water inlet box culvert, a lower-layer water inlet box culvert and a water outlet. The inner-layer well body is located in the center of the hydraulic mixing well without a cover, and a jet hole group is formed in the bottom of the inner-layer well body. The outer-layer well body is located on the periphery of the inner-layer well body without a cover, and an annular space is formed between the outer-layer well body and the inner-layer well body; the upper-layer water inlet box culvert is located above the lower-layer water inlet box culvert, communicates with the side edge of the inner-layer well body and is used for guiding water into the inner-layer well body. The lower-layer water inlet box culvert is positioned below the upper-layer water inlet box culvert and is communicated with the inner-layer well body through a jet hole group at the bottom of the inner-layer well body; the water outlet is located at the bottom of the outer side of the outer-layer well body, and mixed water flows out of the hydraulic mixing well through the water outlet. The hydraulic mixing well is reasonable in structure, high in engineering stability, energy-saving and high in practical engineering applicability.

Description

Technical Field

[0001] The present application relates to the technical field of water conservancy engineering, and in particular to a non-powered orifice jet hydraulic mixing well. Background Art

[0002] In sewage treatment projects, the concentrations of substances in different water bodies are often different. According to the treatment requirements, two or more water bodies with different concentrations need to be mixed into a water body with uniform concentration. In order to achieve this goal, a special centralized treatment pool is generally set up in the project, and a mixing machine or other professional equipment is installed. Although this can solve the problem, it will consume a lot of energy, space and funds, and the maintenance of electricity and mechanical equipment will also increase costs and safety hazards. In addition, the water pumped by the water pump has a certain amount of kinetic energy. In the treatment pool, this part of the kinetic energy is not only not fully utilized, but also increases the load and loss of the mixing equipment. Summary of the invention

[0003] Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a non-powered orifice jet hydraulic mixing well, which utilizes orifice jet to evenly mix two types of water bodies with different water qualities or concentrations, thereby saving energy and having strong applicability.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] The present application provides a non-powered orifice jet type hydraulic mixing well, comprising: an inner well body, an outer well body, an upper water inlet culvert, a lower water inlet culvert and a water outlet;

[0006] The inner well body is located at the center of the hydraulic mixing well, has no cover, and has a group of jet holes at the bottom;

[0007] The outer well body is located at the periphery of the inner well body, has no cover, and forms an annular space between the outer well body and the inner well body;

[0008] The upper water inlet culvert is located above the lower water inlet culvert and is connected to the side of the inner well body, and is used to introduce water into the inner well body;

[0009] The lower water inlet culvert is located below the upper water inlet culvert and is connected to the inner well body through a jet hole group at the bottom of the inner well body;

[0010] The water outlet is located at the outer bottom of the outer well body, and the mixed water flows out of the hydraulic mixing well through the water outlet.

[0011] The annular space formed between the inner well body and the outer well body is a water flow channel. The mixed water will overflow through the upper edge of the inner well body and enter the outer well body, and a certain mixing process will still occur in the process of the water flowing downstream. A water outlet is provided at the bottom of the outer well body to discharge the mixed water.

[0012] The jet hole group at the bottom of the inner well body connects the inner well body with the lower water inlet culvert, so that two streams of water from different sources can flow into the inner well body at the same time. The two streams of water collide and mix inside the well body to achieve the purpose of uniform mixing.

[0013] Because the outlet is located at a low position, the water can still maintain a certain flow rate after flowing out to meet the needs of the downstream. The downstream side is generally connected to an aqueduct, culvert or other water-passing structure.

[0014] In some embodiments, a guide pier is provided at the inner bottom of the lower water inlet culvert, and the guide pier is located below the jet hole group at the bottom of the inner well body, and is used to change the flow direction of water in the lower water inlet culvert, and cooperate with the jet hole group to form multiple jets in the lower water inlet culvert and then enter the inner well body.

[0015] A jet hole group is arranged at the bottom of the inner well body, and a diversion pier is arranged on the inner bottom surface of the lower water inlet culvert. The kinetic energy of the water body can be fully utilized to form multiple jets of water into the inner mixing well body, collide with the water body drawn by the upper water inlet culvert, and be fully mixed without the need for external power support.

[0016] In some embodiments, the elevation of the top edge of the outer well body is higher than the elevation of the top edge of the inner well body.

[0017] In some embodiments, the elevation of the top edge of the outer well body is higher than the water surface elevation of the water source drawn by the lower water intake culvert.

[0018] In some embodiments, the water surface elevation of the water source drawn by the upper water intake box culvert is lower than the water surface elevation of the water source drawn by the lower water intake box culvert.

[0019] In some embodiments, the elevation of the top edge of the inner well body is higher than the water surface elevation of the water source drawn by the upper water intake culvert.

[0020] In some embodiments, the guide pier is a cross guide pier, including two trapezoidal partition piers intersecting in a cross shape.

[0021] In some embodiments, the height of the diversion pier is 0.4 to 0.5 times the internal height of the lower water intake culvert.

[0022] In some embodiments, the jet orifice group includes a plurality of orifices in a symmetrical array.

[0023] The water flow in the lower water inlet culvert flows to the jet hole group after passing through the cross diversion pier below the jet hole group. The whole water flow forms multiple jets after passing through the jet hole group, which directly collide and mix with the water body led by the upper water inlet culvert. In order to achieve a good mixing effect, the orifices are generally distributed symmetrically to ensure that the multiple jets can be dispersed and fully mixed with other water bodies. The specific size and quantity need to be determined according to the different water flow conditions of each project. If conditions permit, it is best to verify it with a hydraulic model test.

[0024] In some embodiments, the inner well body and the outer well body are made of one or more of concrete, steel bars, and engineering plastics.

[0025] Beneficial effects:

[0026] 1. The non-powered orifice jet hydraulic mixing well provided by the present invention is provided with a reasonable mixing well body and its auxiliary structures, which can mix two water bodies of different concentrations evenly and then discharge them, so as to facilitate the unified treatment at a later stage.

[0027] 2. The unpowered orifice jet hydraulic mixing well provided by the present invention saves energy and funds, increases engineering stability, and reduces construction difficulty: the hydraulic mixing well utilizes the kinetic energy of the water body itself to complete the process of evenly mixing the water body, does not require the installation of large-scale electromechanical and mechanical equipment, and does not require energy consumption. This not only saves energy, engineering costs, and operation and maintenance costs, but also eliminates the impact of later equipment failures and repairs; it reduces the installation and debugging of equipment and reduces the difficulty of construction.

[0028] 3. The non-powered orifice jet hydraulic mixing well provided by the present invention saves space: the hydraulic mixing well guides the water body to complete the concentration mixing during the transportation process by setting a reasonable structural type, and there is no need to set up a special large-scale treatment tank, thus saving space.

[0029] 4. The non-powered orifice jet hydraulic mixing well provided by the present invention has strong applicability to actual projects: the concept of this hydraulic mixing well is derived from actual project needs, and its size, as well as the number, position and size of orifices, can be designed according to different projects; it has a wide adaptability, and by controlling the flow velocity and flow conditions of the incoming water body, it can utilize its own kinetic energy to achieve the purpose of uniform concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is an external schematic diagram of a non-powered orifice jet type hydraulic mixing well in an embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of the structural cross section of a non-powered orifice jet type hydraulic mixing well in an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of a jet hole group at the bottom of an inner well body of a non-powered orifice jet hydraulic mixing well in an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of water level measurement points and concentration sampling points for the model test.

[0035] In the figure: 1 inner well body, 2 outer well body, 3 upper water inlet culvert, 4 lower water inlet culvert, 5 jet hole group, 6 diversion pier, 7 water outlet, 8 non-powered orifice jet hydraulic mixing well. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use.

[0037] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may also include different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0038] Embodiment 1:

[0039] This embodiment provides a non-powered orifice jet hydraulic mixing well, such as Figure 1 , Figure 2 As shown, it includes: an inner well body 1, an outer well body 2, an upper water inlet culvert 3, a lower water inlet culvert 4 and a water outlet 7;

[0040] The inner well body 1 is located at the center of the hydraulic mixing well, has no cover, and has a jet hole group 5 at the bottom;

[0041] The outer well body 2 is located at the outer periphery of the inner well body 1, has no cover, and forms an annular space between the outer well body 2 and the inner well body 1;

[0042] The upper water inlet culvert 3 is located above the lower water inlet culvert 4 and is connected to the side of the inner well body 1, and is used to introduce water into the inner well body 1;

[0043] The lower water inlet culvert 4 is located below the upper water inlet culvert 3 and is connected to the inner well body 1 through a jet hole group 5 at the bottom of the inner well body 1;

[0044] The water outlet 7 is located at the outer bottom of the outer well body 2, and the mixed water flows out of the hydraulic mixing well through the water outlet 7.

[0045] In some embodiments, a guide pier 6 is provided at the inner bottom of the lower water inlet culvert 4. The guide pier 6 is located below the jet hole group 5 at the bottom of the inner well body 1 and is used to change the flow direction of water in the lower water inlet culvert 4. In cooperation with the jet hole group 5, the water in the lower water inlet culvert 4 forms multiple jets and then enters the inner well body 1.

[0046] In this embodiment, the guide pier 6 is a cross guide pier, including two trapezoidal partition piers intersecting in a cross shape.

[0047] In this embodiment, the height of the diversion pier 6 is 0.4 times the internal height of the lower water inlet culvert 4 .

[0048] In this embodiment, Figure 3 As shown, the jet hole group 5 includes 9 holes in a 3×3 symmetrical array.

[0049] In some embodiments, the inner well body 1 and the outer well body 2 are made of one or more of concrete, steel bars, and engineering plastics.

[0050] In some embodiments, the elevation of the top edge of the outer well body 2 is higher than the elevation of the top edge of the inner well body 1 .

[0051] In some embodiments, the elevation of the top edge of the outer well body 2 is higher than the water surface elevation of the water source drawn by the lower water inlet culvert 4 .

[0052] In some embodiments, the water surface elevation of the water source drawn by the upper water inlet culvert 3 is lower than the water surface elevation of the water source drawn by the lower water inlet culvert 4 .

[0053] In some embodiments, the elevation of the top edge of the inner well body 1 is higher than the water surface elevation of the water source introduced by the upper water inlet culvert 3 .

[0054] Specifically, the description of the four elevations in this embodiment is as follows:

[0055] Assume that the upper elevation of the inner well body 1 is , the upper elevation of the outer well body 2 is , the water surface elevation of the water source A drawn by the upper water inlet culvert 3 is , the water surface elevation of the water source B drawn by the lower water inlet culvert 4 is .

[0056] The non-powered orifice jet hydraulic mixing well uses jet to achieve the mixing effect. To ensure the mixing effect, the water source B needs to have sufficient kinetic energy to form a sufficient jet when passing through the jet hole group 5, so the water surface elevation of the water source B must be higher than that of the water source A, that is, .

[0057] According to the Bernoulli equation, that is, formula (1):

[0058] (1)

[0059] in: is the flow rate; is the static pressure; is the fluid density; is the acceleration due to gravity; is the kinetic energy correction factor; is a constant.

[0060] exist Figure 1 In the example, take the section S1 near the water source B and the section S2 on the upper edge of the inner well body 1, and divide both sides of the Bernoulli equation by , and then applied to sections S1 and S2 respectively, without considering the head loss between sections, we have:

[0061] (2)

[0062] In formula (2), there are three terms on each side of the equation, which are position head, velocity head and pressure head respectively.

[0063] Generally, there will be head loss in the process of water flow. Since the two sections are close to each other, the loss along the way is small and can be ignored. Therefore, the head loss in this process is mainly local loss. First, assume that the head loss is ,Pick ; Secondly, since the vertical flow velocity of the water surface of water source B is close to 0 and the static pressure is 0, , ; and because the upper edge of the inner well body 1 is an overflow port, it can be approximately considered that Substituting the above conditions into formula (2), we can obtain:

[0064] (3)

[0065] Since the water needs to overflow the upper edge of the inner well body 1, that is, , and head loss , so from the above formula we can get ,Right now .

[0066] Similarly, to ensure that the water does not overflow the upper edge of the outer well 2, the Bernoulli equation is applied again to obtain: .

[0067] Considering the mixing effect of the two water bodies in the inner well body 1, if the flow rate of the water body led by the inner well body to the well body can be reduced, the mixing effect will be better. According to the principle of energy conservation, if the water potential energy of the water source A is appropriately reduced, the flow rate of its water body in the inner well body 1 can be effectively reduced, so the water surface elevation of the water source A is lower than the upper edge elevation of the inner well body 1, that is, .

[0068] To sum up, the relationship between these four elevations should be:

[0069] (4)

[0070] When working, no external power or mechanical equipment is required, as long as the incoming flow in the water inlet culvert, water pipe or channel has sufficient kinetic energy. Two streams of water with different concentrations enter the inner well body 1 through the upper water inlet culvert 3 and the lower water inlet culvert 4, collide and mix inside the well body, and finally mix the two water bodies into a water body with uniform concentration. The evenly mixed water body flows into the outer well body 2 by overflow, and finally maintains a certain flow rate when it flows out from the outlet 7. From then on, the inflow flow and overflow flow will automatically balance, and the entire working process will enter a stable operation stage and can continue to operate for a long time; when the inflow flow gradually decreases, the water level will gradually drop, and the water will no longer flow out from the outlet 7 until the inflow stops, the inner well body 1 is empty, and the work is completed.

[0071] Embodiment 2:

[0072] This embodiment provides a physical model test verification based on the first embodiment. The water inlet box culvert of the physical model is made of gray plastic plate material welded, and the flow surface of the mixed building is made of pure cement. The comprehensive roughness of the model can basically meet the actual engineering needs. The overall model is made according to relevant specifications.

[0073] In the model, the inner well body 2 is connected with the upper water inlet culvert 3 and the lower water inlet culvert 4. In this experiment, two physical models of left and right unpowered orifice jet hydraulic mixing wells 8 are established, and the unpowered orifice jet hydraulic mixing wells 8 of the two models share the same lower water inlet culvert 4.

[0074] In this model test, the jet hole group 5 is 9 0.6 m × 0.6 m water inlet holes in a 3 × 3 arrangement, distributed in a nine-square grid, with a lateral spacing of 0.6 m and a longitudinal spacing of 0.4 m between them.

[0075] The model test uses advanced measuring instruments supplemented by traditional measuring methods for verification:

[0076] For concentration measurement, a fluorescent dye is added to the lower water inlet culvert 4; Figure 4 At the 8 concentration sampling points shown, the absorbance is measured by U2800 UV-visible spectrophotometer to calculate the content of fluorescent agent in each sample, and then the concentration of each sample is calculated. The concentration refers to the volume percentage of the water treated by the primary enhanced high-efficiency sedimentation tank in the sample to the total mixed fluid.

[0077] For the judgment of the results, in this test, the two water bodies are mixed in equal volumes. When the mixture is fully mixed, the theoretical concentration of the sample should be 50%, that is, the volume of the two water bodies in the sample accounts for 1 / 2 of the total volume. After discussion with relevant experts, if the difference between the concentration of the mixed water body and the theoretical concentration of full mixing (50%) is not greater than 10%, it is considered that the hydraulic mixing effect meets the design requirements. Table 1 shows the concentration values ​​at the 8 concentration sampling points in the model test.

[0078] Table 1 Sample concentration values ​​at each sampling point Sampling point 1 2 3 4 5 6 7 8 Sample concentration at each sampling point (%) 53.30 43.87 58.75 43.87 41.56 57.40 47.25 54.00

[0079] It can be seen from the table that the maximum concentration value of the 8 concentration sampling points is 58.75% and the minimum is 41.56%, both of which are within the range of 50%±10%. It can be considered that the concentration mixing effect is good and meets expectations.

[0080] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only used to explain the relative position relationship, movement, etc. between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0081] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0082] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0083] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A non-powered orifice jet hydraulic mixing well, characterized in that: include: Inner well body, outer well body, upper water inlet culvert, lower water inlet culvert and water outlet; The inner well body is located at the center of the hydraulic mixing well, has no cover, and has a group of jet holes at the bottom; The outer well body is located at the periphery of the inner well body, has no cover, and forms an annular space between the outer well body and the inner well body; The upper water inlet culvert is located above the lower water inlet culvert and is connected to the side of the inner well body, and is used to introduce water into the inner well body; The lower water inlet culvert is located below the upper water inlet culvert and is connected to the inner well body through a jet hole group at the bottom of the inner well body; The water outlet is located at the outer bottom of the outer well body, and the mixed water flows out of the hydraulic mixing well through the water outlet.

2. The unpowered orifice jet hydraulic mixing well according to claim 1, characterized in that: A guide pier is provided at the inner bottom of the lower water inlet culvert, and the guide pier is located below the jet hole group at the bottom of the inner well body. It is used to change the flow direction of water in the lower water inlet culvert and cooperate with the jet hole group to form multiple jets in the lower water inlet culvert and then enter the inner well body.

3. The unpowered orifice jet hydraulic mixing well according to claim 1, characterized in that: The elevation of the top edge of the outer well body is higher than the elevation of the top edge of the inner well body.

4. The unpowered orifice jet hydraulic mixing well according to claim 1, characterized in that: The elevation of the top edge of the outer well body is higher than the water surface elevation of the water source drawn by the lower water inlet culvert.

5. The unpowered orifice jet hydraulic mixing well according to claim 1, characterized in that: The water surface elevation of the water source drawn by the upper water inlet box culvert is lower than the water surface elevation of the water source drawn by the lower water inlet box culvert.

6. The unpowered orifice jet hydraulic mixing well according to claim 1, characterized in that: The elevation of the top edge of the inner well body is higher than the water surface elevation of the water source drawn by the upper water inlet culvert.

7. The unpowered orifice jetting hydraulic mixing well according to claim 2, characterized in that: The guide pier is a cross guide pier, comprising two trapezoidal partition piers intersecting in a cross shape.

8. The unpowered orifice jetting hydraulic mixing well according to claim 2, characterized in that: The height of the diversion pier is 0.4 to 0.5 times the internal height of the lower water inlet culvert.

9. The unpowered orifice jetting hydraulic mixing well according to claim 1, characterized in that: The jet hole group includes a plurality of orifices in a symmetrical array.

10. The unpowered orifice jetting hydraulic mixing well according to claim 1, characterized in that: The material of the inner well body and the outer well body is one or more of concrete, steel bars, and engineering plastics.

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