Pipeline hydraulic mixer and control system thereof

Abstract

The utility model discloses a pipeline hydraulic mixer and a control system thereof in the field of water treatment.The pipeline hydraulic mixer comprises a main pipeline, a dosing pipe and a hydraulic system, the main pipeline comprises a water inlet section, a stirring section and a water outlet section, a hydraulic motor is arranged corresponding to the stirring section, and a stirring paddle is coaxially arranged on an output shaft of the hydraulic motor; the chemical adding pipe is communicated with the main pipeline and located on the side, facing the water inlet direction, of the stirring paddle, the liquid outlet end of the hydraulic system is communicated with the liquid inlet end of the hydraulic motor, the liquid inlet end of the hydraulic system is communicated with the liquid outlet end of the hydraulic motor to form a hydraulic loop, and the hydraulic motor drives the output shaft to rotate according to the output oil amount of the hydraulic system. Therefore, the rotating speed of the stirring paddle is adjusted, so that the target speed gradient G mesh of the stirring section is within the range of 600-1000s <-1 >. According to the invention, the medicament can be quickly and uniformly dispersed into water to be treated, and a good mixing effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and particularly relates to a pipeline hydraulic mixer and its control system. Background Technique

[0002] Mixing is an important unit in the water treatment process. The role of mixing is to quickly mix the coagulant added at one point with the surrounding water body, so that the coagulant can uniformly act on all impurity particles, causing them to coagulate into large floc particles and be removed by precipitation in the sedimentation tank. The parameter reflecting the mixing intensity is the velocity gradient G, and generally, the G value is required to reach 600 - 1000 s -1 .

[0003] Mixing equipment includes two categories: hydraulic mixing and mechanical mixing. Hydraulic mixing is achieved through the turbulence caused during the water flow process. Hydraulic mixing equipment includes pipe mixing, hydraulic jump mixing, static mixer mixing, etc. Pipe mixing and hydraulic jump mixing are suitable for the mixing of small water supply pipes, and static mixers are suitable for the mixing of large and medium-sized pipes. Hydraulic mixing has no power equipment and simple facilities. The effect of hydraulic mixing depends on the water flow velocity. The greater the flow velocity, the better the effect, and vice versa. Due to the change in the treated water volume caused by seasonal variations, the hydraulic mixing effect is poor during the period of small water volume. Mechanical mixing equipment installs stirring paddles in the mixing tank and relies on the agitation of the stirring paddles to mix the water body. The mechanical mixing intensity is not affected by the water flow rate, and the effect is stable, but the energy consumption is large. In recent years, some enterprises have developed dynamic mixing equipment inside the pipeline, which uses a push-type paddle board and the power machine is separated from the stirring paddle. Its disadvantages are that the power machine is outside the pipeline, the structure is complex, and the price is high. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pipeline hydraulic mixer and its control system. The hydraulic motor is connected to the stirring paddle and installed inside the pipeline. The hydraulic system drives the hydraulic motor and the stirring paddle to rotate. The structure is simple, the volume is small, and the mixing effect is good.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: A pipeline hydraulic mixer includes a main pipeline and a chemical dosing pipe, and also includes a hydraulic system. The main pipeline includes an inlet section, a stirring section, and an outlet section. A hydraulic motor is provided corresponding to the stirring section. A stirring paddle is coaxially arranged on the output shaft of the hydraulic motor. The chemical dosing pipe is communicated with the main pipeline and is located on the side of the stirring paddle facing the inlet direction. The liquid outlet end of the hydraulic system is communicated with the liquid inlet end of the hydraulic motor, and the liquid inlet end of the hydraulic system is communicated with the liquid outlet end of the hydraulic motor to form a hydraulic circuit. The hydraulic motor drives the output shaft to rotate according to the output oil volume of the hydraulic system, thereby adjusting the rotation speed of the stirring paddle to achieve the target velocity gradient G of the stirring section 目 within the range of 600 - 1000 s -1 .

[0006] When the utility model is in use, the hydraulic system supplies high-pressure oil to the hydraulic motor. After driving the hydraulic motor to rotate, the hydraulic oil then flows back to the hydraulic system for recycling. Adjusting the oil output of the hydraulic system can adjust the rotation speed of the hydraulic motor to obtain a better mixing effect. The water to be treated flows in the main pipeline, and the chemical agent is added into the main pipeline through the chemical agent adding pipe. When the water to be treated and the chemical agent flow through the stirring paddle, they are stirred and mixed. Compared with the prior art, the beneficial effects of the utility model are as follows: the hydraulic motor is small in volume, has small water flow resistance, and saves energy consumption; the structure of the utility model is simple, easy to manufacture, and cheap; the utility model adopts hydraulic control to keep the velocity gradient G in the stirring section within the range of 600-1000s -1 so that the chemical agent can be quickly and evenly dispersed into the water to be treated, and has a better mixing effect.

[0007] As a further improvement of the utility model, the hydraulic system includes a hydraulic pump and a fuel tank. The oil outlet of the hydraulic pump is connected to the oil inlet of the hydraulic motor through an oil inlet pipe. The oil outlet of the hydraulic motor is connected to the oil return port of the fuel tank through an oil outlet pipe. The oil outlet of the fuel tank is connected to the oil inlet of the hydraulic pump through a suction pipe. A flow control valve is arranged on the oil inlet pipe. Installation holes are respectively opened on the main pipeline corresponding to the oil inlet pipe and the oil outlet pipe.

[0008] As a further improvement of the utility model, the hydraulic motor is on the same axis as the main pipeline through a positioning device.

[0009] As a further improvement of the utility model, the positioning device includes at least three groups of fixing components evenly distributed at equal intervals along the outer periphery of the hydraulic motor.

[0010] As a further improvement of the utility model, the fixing component includes a plate-shaped fixing ear, a fixing plate and a bolt. The fixing ear is arranged on the outer periphery of the hydraulic motor and is provided with a first fixing hole. One end of the fixing plate is connected to the inner wall of the main pipeline, and the other end is provided with a second fixing hole. The bolt passes through the first fixing hole and the second fixing hole to connect the fixing ear and the fixing plate.

[0011] The utility model also provides a control system for a pipeline hydraulic mixer, including: a detection unit, arranged in the stirring section, for collecting the numerical value of the velocity difference caused by stirring in the vertical water flow direction; a calculation unit, connected to the detection unit through an electric signal, for collecting the numerical value of the velocity difference and calculating the ratio of the velocity difference to the vertical water flow distance to obtain the actual velocity gradient G 实 ; an acquisition unit, for acquiring and uploading the set G 目 data and instruction information; a controller, connected to the calculation unit, the acquisition unit, the hydraulic pump and the flow control valve through electric signals respectively, and comparing the collected actual velocity gradient G 实 with the target velocity gradient G 目Make a comparison; when G 实 > G 目 , send a throttling instruction to the flow control valve and / or send a deceleration instruction to the hydraulic pump until G 实 value approaches the set G 目 value; when G 实 < G 目 , send a flow increasing instruction to the flow control valve and / or send an acceleration instruction to the hydraulic pump until G 实 value approaches the set G 目 value.

[0012] As a further improvement of the present utility model, the controller sends a control instruction to the hydraulic pump according to the collected instruction information to realize the start and stop of the hydraulic pump. Brief Description of the Drawings

[0013] Figure 1 is a schematic structural view of the mixer of the present utility model.

[0014] Figure 2 is a block diagram of the control system of the present utility model.

[0015] Among them, 1 is the main pipeline, 2 is the hydraulic motor, 3 is the stirring paddle, 4 is the hydraulic pump, 5 is the chemical addition pipe, 6 is the inlet pipe, 7 is the outlet pipe, 8 is the fixing plate, 9 is the fixing ear, 10 is the bolt, 11 is the fuel tank, and 12 is the suction pipe. Detailed Description of the Preferred Embodiments

[0016] As Figure 1 shown, it is a pipeline hydraulic mixer, including a main pipeline 1, a chemical addition pipe 5 and a hydraulic system. The main pipeline 1 includes a water inlet section, a stirring section and a water outlet section. A hydraulic motor 2 is provided corresponding to the stirring section. A stirring paddle 3 is coaxially arranged on the output shaft of the hydraulic motor 2. The chemical addition pipe 5 is communicated with the main pipeline 1 and is located on one side of the stirring paddle 3 facing the water inlet direction. The liquid outlet end of the hydraulic system is communicated with the liquid inlet end of the hydraulic motor 2, and the liquid inlet end of the hydraulic system is communicated with the liquid outlet end of the hydraulic motor 2 to form a hydraulic circuit. The hydraulic motor 2 drives the output shaft to rotate according to the output oil volume of the hydraulic system, so as to adjust the rotation speed of the stirring paddle 3 to achieve the target speed gradient G target of the stirring section within the range of 600 - 1000 s -1 .

[0017] In this embodiment, the hydraulic system includes a hydraulic pump 4 and a fuel tank 11. The oil outlet of the hydraulic pump 4 is connected to the oil inlet of the hydraulic motor 2 through an inlet pipe 6. The oil outlet of the hydraulic motor 2 is connected to the oil return port of the fuel tank 11 through an outlet pipe 7. The oil outlet of the fuel tank 11 is connected to the oil inlet of the hydraulic pump 4 through a suction pipe 12. A flow control valve is provided on the inlet pipe 6. Installation holes are provided on the main pipeline 1 corresponding to the inlet pipe 6 and the outlet pipe 7.

[0018] The hydraulic motor 2 and the main pipeline 1 are on the same axis through the positioning device; preferably, the positioning device comprises three groups of fixed components equally spaced along the outer periphery of the hydraulic motor 2; the fixed components include a plate-shaped fixed ear 9, a fixed plate 8 and a bolt 10, the fixed ear 9 is arranged on the outer periphery of the hydraulic motor 2 and is provided with a first fixing hole, one end of the fixed plate 8 is connected to the inner wall of the main pipeline 1, the other end is provided with a second fixing hole, and the bolt 10 passes through the first fixing hole and the second fixing hole to connect the fixed ear 9 with the corresponding fixed plate 8.

[0019] As Figure 2 shown, the present utility model further provides a control system for a pipeline hydraulic mixer, comprising:

[0020] A detection unit, arranged in the stirring section, for collecting the numerical value of the velocity difference caused by stirring in the direction perpendicular to the water flow; a calculation unit, connected to the detection unit through an electrical signal, for collecting the numerical value of the velocity difference and calculating the ratio of the velocity difference to the distance perpendicular to the water flow to obtain the actual velocity gradient G 实 ; an acquisition unit, for acquiring and uploading the set G 目 data and instruction information; a controller, connected to the calculation unit, the acquisition unit, the hydraulic pump 4 and the flow control valve through electrical signals respectively, comparing the collected actual velocity gradient G 实 with the target velocity gradient G 目 ; when G 实 > G 目 , sending a throttling instruction to the flow control valve and / or sending a deceleration instruction to the hydraulic pump 4 until the value of G 实 tends to the set value of G 目 ; when G 实 < G 目 , sending a flow increasing instruction to the flow control valve and / or sending an acceleration instruction to the hydraulic pump 4 until the value of G 实 tends to the set value of G 目 ; when G 实 is within the range of G 目 , keeping the rotational speed of the hydraulic pump 4 unchanged and maintaining the opening degree of the flow control valve. Further, the controller sends a control instruction to the hydraulic pump 4 according to the collected instruction information to control the start and stop of the hydraulic pump 4, so as to realize the quick start and stop of the stirring paddle 3.

[0021] When the utility model is in use, the hydraulic pump 4 extracts hydraulic oil through the suction pipe 12 and supplies high-pressure oil with a pressure of 10 MPa to the hydraulic motor 2 through the inlet pipe 6. After driving the hydraulic motor 2 to rotate, the hydraulic oil returns to the fuel tank 11 through the outlet pipe 7, and the hydraulic oil is recycled; by changing the opening area of the flow control valve, the oil output of the hydraulic pump 4 can be adjusted, so as to adjust the rotation speed of the hydraulic motor 2, and the rotation speed of the hydraulic pump 4 can also be adjusted to obtain a better mixing effect; the water to be treated flows in the main pipeline 1, and the medicament is added into the main pipeline 1 through the chemical dosing pipe 5. When the water to be treated and the medicament flow through the stirring paddle 3, they are stirred and mixed.

[0022] The advantages of the utility model are as follows: combined with a control system, when the mixer is running, the detection unit and the calculation unit are used to feedback the real-time velocity gradient, and then combined with the acquisition unit, the controller can automatically and dynamically adjust the oil output to adjust the movement speed of the stirring paddle 3, so as to ensure the velocity gradient G of the stirring section. 目 Within the range of 600 - 1000 s -1 to achieve the optimal mixing effect.

[0023] The utility model is not limited to the above embodiments. Based on the technical solutions disclosed by the utility model, those skilled in the art can make some substitutions and deformations to some technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the utility model.

Claims

1. A pipeline hydraulic mixer, comprising a main pipeline and a chemical dosing pipe, characterized in that, It also includes a hydraulic system. The main pipeline includes a water inlet section, a stirring section, and a water outlet section. A hydraulic motor is provided corresponding to the stirring section. A stirring paddle is coaxially arranged on the output shaft of the hydraulic motor. The chemical addition pipe is communicated with the main pipeline and is located on one side of the stirring paddle facing the water inlet direction. The liquid outlet end of the hydraulic system is communicated with the liquid inlet end of the hydraulic motor, and the liquid inlet end of the hydraulic system is communicated with the liquid outlet end of the hydraulic motor to form a hydraulic circuit. The hydraulic motor drives the output shaft to rotate according to the amount of oil output by the hydraulic system, so as to adjust the rotation speed of the stirring paddle to achieve the target velocity gradient G of the stirring section. 目 within 600 - 1000 s -1 range.

2. The hydraulic pipeline mixer according to claim 1, characterized in that, The hydraulic system includes a hydraulic pump and a fuel tank. The oil outlet of the hydraulic pump is connected to the oil inlet of the hydraulic motor through an inlet pipe. The oil outlet of the hydraulic motor is connected to the oil return port of the fuel tank through an outlet pipe. The oil outlet of the fuel tank is connected to the oil inlet of the hydraulic pump through a suction pipe. A flow control valve is provided on the inlet pipe. Installation holes are formed in the main pipe corresponding to the inlet pipe and the outlet pipe.

3. The hydraulic mixer for pipeline according to claim 2, characterized in that, The hydraulic motor is on the same axis as the main pipe through a positioning device.

4. The hydraulic mixer for pipelines according to claim 3, wherein The positioning device includes at least three groups of fixing components evenly distributed at equal intervals along the outer periphery of the hydraulic motor.

5. The hydraulic mixer for pipelines according to claim 4, characterized in that, Each fixing component includes a plate-shaped fixing ear, a fixing plate and a bolt. The fixing ear is arranged on the outer periphery of the hydraulic motor and is provided with a first fixing hole. One end of the fixing plate is connected to the inner wall of the main pipe, and the other end is provided with a second fixing hole. The bolt passes through the first fixing hole and the second fixing hole to connect the fixing ear and the fixing plate.

6. A control system for a pipeline hydraulic mixer, comprising the pipeline hydraulic mixer according to any one of claims 2-5, characterized in that, It further includes: A detection unit, arranged in the stirring section, for collecting the numerical value of the velocity difference caused by stirring in the vertical water flow direction; A calculation unit, connected to the detection unit via an electrical signal, is configured to collect the numerical value of the velocity difference and calculate the ratio of the velocity difference to the distance from the vertical water flow, so as to obtain the actual velocity gradient G 实 ; An acquisition unit for acquiring and uploading set G 目 data and instruction information; The controller is connected to the computing unit, the acquisition unit, the hydraulic pump, and the flow control valve respectively through electrical signals, and compares the actually collected speed gradient G 实 with the target speed gradient G 目 ; when G 实 > G 目 , a throttling instruction is sent to the flow control valve, and / or a deceleration instruction is sent to the hydraulic pump until the value of G 实 approaches the set value of G 目 ; when G 实 < G 目 , a flow increasing instruction is sent to the flow control valve, and / or an acceleration instruction is sent to the hydraulic pump until the value of G 实 approaches the set value of G 目 value.

7. The control system of a pipeline hydraulic mixer according to claim 6, characterized in that, The controller sends a control instruction to the hydraulic pump according to the collected command information to realize the start and stop of the hydraulic pump.

Images