Automatic dosing structure for sewage treatment

Abstract

This invention belongs to the field of wastewater treatment, and particularly relates to an automatic dosing structure for wastewater treatment; it includes a dosing pump head, one-way valve components, pipe fittings, and a flow divider. The dosing pump head is constructed by welding two half-shells, with an internally connected flow channel including a flow guide hole and a three-branch channel. This invention controls the directional flow of chemicals, clean water, and mixed liquid by setting three sets of one-way valve components. The one-way valve components use a combination of sealing ball and spring to ensure sealing. A double-layer flow divider is used, which forms a vortex through oblique flow holes to reduce chemical precipitation. Combined with a flow isolation ring, it achieves stratified isolation of chemicals and clean water, effectively preventing crystallization and blockage of the flow guide hole. At the same time, the structural design of the pressure accumulator ring can accelerate the impact of the discharge hole wall, further inhibiting crystal adhesion. This invention can maintain metering accuracy, reduce maintenance frequency, and is suitable for wastewater treatment systems with diaphragm metering pumps, solving the technical problems of easy crystallization and metering inaccuracy in traditional dosing devices.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment, and particularly relates to an automatic dosing structure for wastewater treatment. Background Technology

[0002] In wastewater treatment, automatic dosing systems are widely used to add chemical agents such as flocculants, disinfectants, and pH adjusters to ensure that water quality meets standards. Traditional automatic dosing systems typically include a storage tank, metering pump, dosing pipeline, and control system. By monitoring water quality parameters (such as turbidity, pH value, COD, etc.) in real time, the dosing amount is adjusted to achieve precise dosing.

[0003] However, in actual operation, the dosing accuracy of the pumping system is easily affected by chemical crystallization. This is especially true when adding high-concentration or easily crystallizing agents such as PAC and lime slurry. The agents gradually crystallize on the inner wall of the pipe, leading to a reduction in pipe diameter, increased pumping resistance, and even blockage. This not only reduces the accuracy of the dosing but may also cause problems such as metering pump overload and dosing interruption, thus affecting the wastewater treatment effect. Furthermore, the accumulation of crystals increases the frequency of equipment maintenance, raises manual cleaning costs, and affects the long-term stable operation of the system.

[0004] In existing technologies, some dosing systems alleviate crystallization problems by heating the pipeline or periodically flushing. However, heating consumes a lot of energy and may alter the properties of the chemicals; while manual flushing relies on frequent intervention and is difficult to automate. Therefore, there is an urgent need for an automatic dosing system that can effectively suppress crystallization in the dosing pipeline and ensure the long-term stability of the pumping volume, so as to improve the reliability and economy of wastewater treatment systems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an automatic dosing structure for wastewater treatment, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solution: The present invention provides an automatic dosing structure for wastewater treatment, comprising: a dosing pump head, a one-way valve component, a pipe fitting joint, and a flow-dividing component; the dosing pump head is welded from two half-shells and has an internal flow-guiding channel, the flow-guiding channel comprising: a flow-guiding hole whose upper and lower ends are respectively connected to a dosing outlet, a dosing inlet, a vertically arranged flow-guiding hole, and a three-branch channel, one end of the three-branch channel being connected to a water inlet, and the other two ends being respectively connected to the middle and lower parts of the flow-guiding hole; the flow-guiding hole is provided with two flow-dividing components, respectively located at the confluence of the three-branch channel and the flow-guiding hole; the flow-dividing component includes a flow-dividing ring, a flow-isolation ring, and a pressure-accumulating ring, used to optimize the fluid path and prevent the crystallization and deposition of the agent; the dosing outlet, the water inlet, and the dosing inlet are all provided with one-way valve components.

[0007] According to an advantageous embodiment, the outer circumferential sidewall of the diversion ring is provided with a semi-arc-shaped guide groove, and a plurality of oblique flow holes are provided between the guide groove and the inner wall of the diversion ring for forming a swirling flow of liquid and reducing agent deposition.

[0008] According to an advantageous embodiment, the flow-blocking ring is located at the lower end of the flow-dividing ring, and its inner wall is configured with an arc-shaped chamfer to guide liquid flow and reduce crystal adhesion.

[0009] According to an advantageous embodiment, the accumulator ring is slidably disposed on the upper side of the diverter ring, its inner diameter gradually shrinks along the direction of liquid flow, and its outer wall is also uniformly provided with balls that fit against the inner wall of the guide hole.

[0010] According to an advantageous embodiment, the one-way valve component includes a sealing ring, a sealing ball, and a spring, wherein the sealing ball is in contact with the sealing ring by gravity, and the spring provides an auxiliary sealing force to the sealing ball.

[0011] According to an advantageous embodiment, the spring at the drug outlet position abuts against the pipe fitting joint; the spring at the water inlet position abuts against the inner wall of the guide channel; and the spring at the drug inlet position abuts against the flow-blocking ring.

[0012] According to an advantageous embodiment, the flow divider ring in the middle of the flow guide hole has a semi-arc structure.

[0013] According to an advantageous embodiment, the inclined direction of the oblique flow orifice forms an angle of 30° to 60° with the direction of liquid flow, causing the agent to form a vortex and reducing precipitation.

[0014] Compared with the prior art, the automatic dosing structure for sewage treatment provided in this embodiment of the invention has the following beneficial effects: 1. The invention uses inclined orifices on the diversion ring to guide the agent to form a swirling flow at an inclination angle of 30°–60°, continuously scouring the inner wall of the diversion orifice, destroying the conditions for crystal adhesion, and mixing the agent with clean water to reduce the agent concentration. At the same time, the three-branch channel injects clean water into the middle and lower part of the diversion orifice. The arc-shaped chamfer of the baffle ring achieves a slight stratification of agent and clean water flow. The clean water forms a dynamic isolation film on the pipe wall, reducing the direct contact of the agent with the metal wall surface, inhibiting crystal nucleation and growth, effectively avoiding problems such as increased pumping resistance of the metering pump and interruption of dosing, and improving the sewage treatment effect. At the same time, the reduction of crystals can reduce the frequency of equipment maintenance, reduce manual cleaning costs, and ensure the long-term stable operation of the system.

[0015] 2. The accumulator ring of this invention features a gradually narrowing inner diameter design combined with a ball bearing sliding structure, which accelerates the fluid step by step during the discharge stage, forming a high-speed jet that impacts the residual crystals on the pipe wall; at the same time, during the intake stage, the agent and water are filled at a low speed, and during the discharge stage, the liquid is sprayed at a high speed, using the velocity difference to generate shear force to peel off potential crystals. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a front-view sectional view of the present invention.

[0018] Figure 3 This is a top-view perspective view of the three-dimensional structure between the flow divider ring and the flow barrier ring at the lower part of the flow guide hole in this invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the flow divider ring and flow barrier ring at the bottom of the flow guide hole of the present invention, viewed from below.

[0020] Figure 5 This is a three-dimensional structural diagram of the accumulator ring of the present invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the sealing ring of the present invention.

[0022] Figure 7 This is a cross-sectional view of the flow guide hole and the flow isolation ring in the present invention.

[0023] Figure 8 This is a cross-sectional view of the internal structure of a portion of the present invention installed at the end of the dosing pump.

[0024] The attached diagram shows the following labels: 1. Injection pump head; 2. One-way valve component; 3. Pipe fitting joint; 4. Diverter component; 11. Half-shell; 12. Inlet; 13. Inlet; 14. Inlet; 15. Mounting port; 16. Guide hole; 17. Three-branch channel; 41. Diverter ring; 411. Guide groove; 412. Inclined flow hole; 42. Isolation ring; 421. Chamfered corner; 43. Accumulator ring; 431. Ball bearing; 21. Sealing ring; 22. Sealing ball; 23. Spring. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 This application will be described in further detail.

[0026] Please refer to the following: Figure 1 and Figure 2An automatic dosing structure for wastewater treatment includes: a dosing pump head 1, a one-way valve component 2, a pipe fitting joint 3, and a flow diversion component 4. The dosing pump head 1 is welded from two half-shells 11 to house the one-way valve component 2, the pipe fitting joint 3, and the flow diversion component 4 during production. A sealing gasket is provided at the joint of the two half-shells 11 to maintain the seal of the weld seam of the dosing pump head 1 and prevent leakage during internal liquid flow. The dosing pump head 1 has a dosing outlet 12, a water inlet 13, a dosing inlet 14, and an installation port 15. The dosing outlet 12, the water inlet 13, the dosing inlet 14, and the installation port 15 are all connected by a flow guide channel inside the dosing pump head 1. The flow guide channel is connected to the dosing inlet 14 and the dosing outlet at both ends. The system consists of a vertically arranged guide hole 16 and a three-branch channel 17 connected to the inlet 13. One end of the three-branch channel 17 is connected to the inlet 13, and the other two ends are connected to the middle and lower parts of the guide hole 16, respectively. The outlet 12, inlet 13, and inlet 14 of the guide channel are all threaded with pipe fittings 3, and the pipe fittings 3 are usually provided with sealing gaskets at the connection points to maintain the interface sealing. One-way valve components 2 are provided at the outlet 12, inlet 13, and inlet 14 of the guide channel. There are two diversion components 4, which are respectively located inside the guide hole 16 and at the middle and lower parts of the confluence of the three-branch channel 17.

[0027] When this invention is installed on a diaphragm metering pump for use, the mounting port 15 is first threadedly connected to the drive end of the diaphragm metering pump, and the connection is sealed using a sealing ring or similar means. When the diaphragm metering pump is working, the drive component drives the diaphragm to reciprocate, drawing in and discharging the chemical. During the chemical intake process, the one-way valve components 2 at the water inlet 13 and the chemical inlet 14 open, while the one-way valve component 2 at the chemical outlet 12 closes. The chemical enters the guide hole 16 through the chemical inlet 14. Meanwhile, clean water also enters the middle and lower parts of the guide hole 16 from the inlet 13 to mix with the agent and dilute it. The clean water entering is mostly located on the outside of the agent, which can provide slight isolation to the hole wall of the guide hole 16. During the process of discharging the agent, the one-way valve component 2 at the outlet 12 is opened, and the one-way valve components 2 at the inlet 13 and the inlet 14 are closed, and the agent is discharged with the outlet 12. The above reciprocating pumping operation is repeated until the agent pumping is completed.

[0028] See Figure 2 and Figure 8The mounting port 15 is designed with an internal thread for connection with an external dosing pump. The threaded design facilitates disassembly and installation, and allows for periodic replacement of the diaphragm at the drive end of the diaphragm metering pump. In actual use, the elasticity of the diaphragm in the diaphragm metering pump decreases during long-term reciprocating motion, and periodic replacement of the diaphragm is necessary to ensure the accuracy of the quantitative pumping of the drug.

[0029] See Figure 2 and Figure 6 The one-way valve component 2 includes a sealing ring 21, a sealing ball 22, and a spring 23. The sealing ring 21 is fixedly disposed inside the flow channel, and the sealing ball 22 is slidably disposed inside the flow channel. The sealing ball 22 is placed on the upper end of the sealing ring 21 by gravity. The actual sealing ring 21 is composed of a metal ring and a rubber ring covering the outer wall of the metal ring. The purpose is to ensure the sealing between the sealing ball 22 and the sealing ring 21. The upper end of the sealing ball 22 is provided with a lug seat, and the upper end of the lug seat is provided with a compressed spring 23. The other end of the spring 23 on the one-way valve component 2 at the outlet 12 position abuts against the pipe fitting joint 3. The other end of the spring 23 on the one-way valve component 2 at the inlet 13 position abuts against the inner wall of the flow channel. The other end of the spring 23 on the one-way valve component 2 at the inlet 14 position abuts against the ring wall of the flow isolation ring 42.

[0030] During the process of drawing in the medicine, the internal space of the guide hole 16 increases as the medicine is drawn in. At this time, the external pressure is greater than the internal pressure of the guide hole 16, and the one-way valve components 2 at the water inlet 13 and the medicine inlet 14 open. The sealing ball 22 moves upward and disengages from the sealing ring 21, and the clean water and medicine enter the guide hole 16 and fill it. When the medicine is discharged, the internal space of the guide hole 16 is compressed. At this time, the internal pressure of the guide hole 16 is greater than the external pressure of the guide hole 16, and the one-way valve components 2 at the water inlet 13 and the medicine inlet 14 remain closed. The one-way valve component 2 at the medicine outlet 12 opens, and the medicine diluted with clean water is discharged from the medicine outlet 12.

[0031] See Figure 2 , Figure 3 and Figure 4 The diversion component 4 includes a diversion ring 41, and the outer circumferential sidewall of the diversion ring 41 is provided with a semi-arc-shaped guide groove 411 along its circumferential direction. A plurality of oblique flow holes 412 are uniformly arranged between the guide groove 411 and the inner wall of the diversion ring 41. The inclination direction of the oblique flow holes 412 forms an angle of 30° to 60° with the liquid flow direction, so that vortices can be formed during the process of the agent entering and exiting the guide hole 16, reducing sedimentation. A flow-blocking ring 42 is fixedly provided on the inner wall of the lower end of the diversion ring 41, and the inner wall of the flow-blocking ring 42 is provided with an arc-shaped chamfer 421.

[0032] During the process of inhaling the agent and clean water, due to the presence of the flow-blocking ring 42, the inhaled agent flows along the arc-shaped chamfer 421 into the middle of the guide hole 16, while the clean water flows along the inclined flow hole 412 into the side wall of the guide hole 16. This slight stratification of the agent and clean water effectively prevents the agent from forming crystals and precipitating on the hole wall of the guide hole 16. At the same time, the clean water can dilute the concentration of the agent, further reducing the crystal precipitation on the hole wall of the guide hole 16. During the process of the agent being diluted by the clean water and discharged, the clean water remaining inside the three-branch channel 17 will be discharged along with it, continuously forming a protective ring and reducing crystal adhesion. This effectively avoids problems such as increased pumping resistance of the metering pump and interruption of dosing, improving the sewage treatment effect. At the same time, the reduction in crystals can reduce the frequency of equipment maintenance, reduce manual cleaning costs, and ensure long-term stable operation of the system. In addition, the diversion components 4 in this invention are respectively set inside the guide hole 16 and at the middle and lower positions of the confluence with the three-branch channel 17. This can effectively prevent the protective ring from failing due to an excessively long flow path in the guide hole 16.

[0033] See Figure 2 and Figure 5 The diversion component 4 further includes a pressure accumulator ring 43 slidably disposed on the upper side of the diversion ring 41. The outer circumference of the pressure accumulator ring 43 is uniformly provided with ball bearings 431 that fit against the inner wall of the guide hole 16, and the inner diameter of the pressure accumulator ring 43 gradually decreases along the liquid flow direction. During the discharge of the agent inside the guide hole 16, since the speed at which the diaphragm reciprocates driven by the drive end in the diaphragm metering pump is usually consistent, during the suction process, the agent and clean water will simultaneously enter the guide hole 16 for filling, while during the discharge process, only one outlet 12 is provided, and the pressure accumulator ring 43 is also movable through the ball bearings 43, and the inner diameter of the pressure accumulator ring 43 gradually decreases along the liquid flow direction. Thus, during the discharge of the agent, the agent inside will undergo multiple acceleration treatments. At this time, the speed difference between suction and discharge of the agent greatly increases the impact rate on the orifice wall of the guide hole 16, reduces the crystallization of the agent adhering to the orifice wall, thereby ensuring the capacity inside the guide hole 16, thereby maintaining the accuracy of the metered pumping of the agent, and improving the effect of sewage treatment.

[0034] See Figure 2 and Figure 7 The flow divider ring 41 inside the flow divider component 4 in the middle of the flow guide hole 16 has a semi-arc structure, which is intended to avoid interference with the reciprocating diaphragm in the diaphragm metering pump.

[0035] When using this invention, the mounting port 15 is threadedly connected to the drive end of the diaphragm metering pump, and a sealing ring is installed at the connection to maintain the sealing strength and prevent leakage during the pumping of the agent. Next, the pipe fitting 3 is connected to the pipeline, ensuring the connection remains sealed. Then, the pipeline at the outlet 12 is placed into the wastewater treatment tank, the pipeline at the inlet 13 is placed into a container filled with clean water, and the pipeline at the inlet 14 is placed into a container filled with the agent. Finally, by operating the electrical control box, the amount of agent pumped per cycle is adjusted according to the wastewater treatment volume. The diaphragm metering pump operates through a "suction-discharge" process. The agent delivery is completed in two strokes. The entire process is achieved by the reciprocating motion of the diaphragm driven by the drive mechanism in the diaphragm metering pump. It should be noted that during the entire agent pumping process, in order to prevent the agent from crystallizing in the guide hole 16 and thus affecting the accuracy of the metering, a small amount of scale inhibitor or dispersant (such as polycarboxylic acid or organophosphonate) can be added to the agent according to the agent type (such as acidic / alkaline, organic / inorganic). This will inhibit the adhesion of crystals to the inner wall of the guide hole 16 by interfering with the nucleation and growth process of crystals. At the same time, it should be noted that the additives must be compatible with the main agent to avoid affecting the wastewater treatment effect (for example, if an additive is added to a flocculant, the coagulation effect must be tested).

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic chemical dosing structure for wastewater treatment, characterized in that, include: Injection pump head, check valve components, pipe fittings and flow divider components; The injection pump head is welded together from two half-shells and has an internal flow guiding channel, which includes: The vertically arranged guide hole connects the drug outlet and the drug inlet at its upper and lower ends, respectively. The three-branch channel connects to the inlet at one end and to the middle and lower parts of the guide hole at the other two ends, respectively. The guide hole is equipped with two flow-dividing components, which are located at the confluence of the three-branch channel and the guide hole. The flow diversion component includes a flow diversion ring, a flow isolation ring, and a pressure storage ring, which are used to optimize the fluid path and prevent the crystallization and deposition of the agent. The medicine outlet, water inlet, and medicine inlet are all equipped with one-way valve components; The outer circumferential sidewall of the diversion ring is provided with a semi-arc-shaped guide groove. Between the guide groove and the inner wall of the diversion ring, there are several oblique flow holes for forming a swirling flow of liquid and reducing the deposition of the agent. Clean water will enter the sidewall of the guide hole along the oblique flow holes. The agent and clean water are slightly separated by stratification, which effectively avoids the formation of crystal precipitation of the agent on the hole wall of the guide hole.

2. The automatic dosing structure for wastewater treatment according to claim 1, characterized in that: The flow-blocking ring is located at the lower end of the flow-dividing ring, and its inner wall is configured with an arc-shaped chamfer to guide liquid flow and reduce crystal adhesion.

3. The automatic dosing structure for wastewater treatment according to claim 2, characterized in that: The accumulator ring is slidably disposed on the upper side of the diverter ring. Its inner diameter gradually decreases along the direction of liquid flow, and its outer wall is also uniformly provided with ball bearings that fit against the inner wall of the guide hole.

4. The automatic dosing structure for wastewater treatment according to claim 1, characterized in that: The one-way valve component includes a sealing ring, a sealing ball, and a spring. The sealing ball adheres to the sealing ring by gravity, and the spring provides auxiliary sealing force to the sealing ball.

5. The automatic dosing structure for wastewater treatment according to claim 4, characterized in that: The spring at the medicine outlet abuts against the pipe fitting; the spring at the water inlet abuts against the inner wall of the guide channel; and the spring at the medicine inlet abuts against the flow-blocking ring.

6. The automatic dosing structure for wastewater treatment according to claim 1, characterized in that: The flow divider ring in the middle of the flow guide hole has a semi-arc structure.

7. The automatic dosing structure for wastewater treatment according to claim 1, characterized in that: The inclination direction of the oblique flow orifice forms an angle of 30° to 60° with the direction of liquid flow.

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