Automatic proportioning device for dissolving granular water-soluble fertilizer

Abstract

The application relates to the technical field of water-soluble fertilizer production equipment, in particular to an automatic proportioning device for granular water-soluble fertilizer dissolution, which comprises a supporting frame, the bottom end of the supporting frame is fixedly connected with an annular pipeline, the two ends of the annular pipeline are fixedly connected with the two ends of a three-way valve centrifugal pump, the side end of the three-way valve centrifugal pump is fixedly connected with a liquid outlet pipe B, the inner side of the annular pipeline is fixedly connected with a flow guide plate group and a static mixer, the outer side of the annular pipeline is through-connected with a water inlet pipe B, the lower ends of four 45-degree elbows are fixedly connected with four positions on the upper side of the annular pipeline, the upper ends of the 45-degree elbows are fixedly connected with the water outlet ends of screw rods, the upper end of the supporting frame is fixedly connected with a dissolution tank, and the water inlet ends of the screw rod pumps are fixedly connected with a liquid outlet pipe A. The application adopts a structure of hierarchical dissolution, point feeding, circulating mixing and intelligent control, and is obviously improved in the aspects of dissolution efficiency, proportioning precision, energy consumption, space utilization and the like compared with an existing single-time stirring device.

Description

Technical Field

[0001] This application relates to the technical field of water-soluble fertilizer mixing equipment, and in particular to an automatic mixing device for dissolving granular water-soluble fertilizer. Background Technology

[0002] In agricultural production, granular water-soluble fertilizers are widely used due to their high efficiency and convenience. When using them, it is necessary to mix various granular water-soluble fertilizers according to the formula and then dissolve them in water. The accuracy of the mixing ratio and the degree of dissolution directly affect the fertilization effect. Existing automatic mixing devices for dissolving granular water-soluble fertilizers mostly use a single-dissolution method with stirring by a mixer, which has the following problems:

[0003] Low dissolution efficiency: The short residence time of sparingly soluble water-soluble fertilizers in a single dissolution process, the existence of dead zones in the mixer, and insufficient stirring result in uneven solution concentration;

[0004] Poor proportioning accuracy: Relies on simple flow control, cannot be dynamically adjusted in real time, and is prone to causing nutrient imbalance;

[0005] High energy consumption: High-power mixing equipment has high energy consumption;

[0006] Low space utilization: The horizontally laid-out dissolving and mixing units occupy a large area, which is not suitable for the needs of intensive production.

[0007] Therefore, there is an urgent need for a new type of automatic dissolution device that can achieve complete dissolution, precise proportioning, and save energy and space. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this application is to provide an automatic proportioning device for dissolving granular water-soluble fertilizers that features good dissolution efficiency, high proportioning accuracy, low energy consumption, and high space utilization.

[0009] The above-mentioned objective of this application is achieved through the following technical solution:

[0010] An automatic proportioning device for dissolving granular water-soluble fertilizer includes a support frame and a circulation device. The circulation device includes an annular pipe. The bottom end of the support frame is fixedly connected to the annular pipe. One end of the annular pipe is fixedly connected to the inlet end of a three-way valve centrifugal pump. The other end of the annular pipe is fixedly connected to the axial outlet end of the three-way valve centrifugal pump. The side outlet end of the three-way valve centrifugal pump is fixedly connected to an outlet pipe B. A guide plate assembly is fixedly connected to the position after the axial outlet end of the three-way valve centrifugal pump on the inner side of the annular pipe. The position after the guide plate assembly on the outer side of the annular pipe is connected to the inlet pipe B. A static mixer is fixedly connected to the position after the inlet pipe B on the inner side of the annular pipe. The lower ends of four 45° elbows are fixedly connected to four positions on the upper side of the annular pipe. The upper ends of the 45° elbows are fixedly connected to the outlet end of a screw pump. The upper end of the support frame is fixedly connected to a dissolving tank. The inlet end of the screw pump is fixedly connected to the outlet pipe A of the dissolving tank.

[0011] Optionally, the dissolving tank includes a cylindrical wall, the lower end of which is fixedly connected to the upper end of a conical hopper, the lower end of which is fixedly connected to an outlet pipe A, the upper end of which is fixedly connected to a top cover plate, a speed reducer fixedly connected to the upper surface of the middle position of the top cover plate, the lower surface of a motor fixedly connected to the upper surface of the speed reducer, the output end of the motor fixedly connected to the input end of the speed reducer, the lower surface of the middle position of the top cover plate rotatably connected to the shaft of a threaded plate, the output end of the speed reducer fixedly connected to the shaft of the threaded plate, the upper surface of the top cover plate through which a water inlet pipe A is connected, and the upper surface of the top cover plate through which a feed hopper is connected.

[0012] Optionally, a heating device is fixedly connected to the cylinder wall. The heating device includes a heating jacket, an air inlet pipe, and an air outlet pipe. The heating jacket is equipped with a PID temperature control component. The air inlet pipe is connected through the outer side of the lower end of the heating jacket, and the air outlet pipe is connected through the outer side of the upper end of the heating jacket.

[0013] Optionally, a liquid level sensor is fixedly connected to the upper surface of the upper cover plate, a conductivity sensor and a temperature sensor are fixedly connected to the inner side of the cylinder wall, and a concentration sensor is fixedly connected to the inner side of the annular pipe.

[0014] Optionally, the lower ends of the four 45° elbows are fixedly connected to the upper side of the annular pipe at the following positions: before the suction port of the three-way valve centrifugal pump, after the pressure port of the three-way valve centrifugal pump, before the static mixer, and inside the static mixer. The sparingly soluble water-soluble fertilizer is added before the suction port of the three-way valve centrifugal pump, the moderately soluble water-soluble fertilizer is added after the pressure port of the three-way valve centrifugal pump, the readily soluble water-soluble fertilizer is added before the static mixer, and the trace elements are added inside the static mixer.

[0015] Optionally, the inlet pipe B is equipped with a flow meter A and an electromagnetic regulating valve A, and the outlet pipe B is equipped with a flow meter B and an electromagnetic regulating valve B.

[0016] Optionally, a control panel is fixedly connected to the upper surface of the bottom end of the support frame. The input end of the control panel is electrically connected to the output end of an external power supply. The input end of the control panel is electrically connected to the output ends of the liquid level sensor, conductivity sensor, temperature sensor, concentration sensor, flow meter A, and flow meter B, respectively. The output end of the control panel is electrically connected to the input ends of electromagnetic regulating valve A and electromagnetic regulating valve B. The output end of the control panel is electrically connected to the input ends of the motor, PID temperature control component, screw pump, electromagnetic regulating valve, and three-way valve centrifugal pump.

[0017] By adopting the above solution, this utility model has at least one of the following beneficial effects compared with the prior art:

[0018] 1. Improved dissolution efficiency and mixing uniformity: This application uses four sets of dissolution tanks to dissolve granular water-soluble fertilizers in zones according to their solubility, and is equipped with variable frequency stirring and heating jackets to optimize dissolution conditions for different types of water-soluble fertilizers;

[0019] The sparingly soluble water-soluble fertilizer is added before the suction inlet of the three-way valve centrifugal pump, and the pump's suction force creates a high-speed turbulent flow to promote dissolution; the moderately soluble water-soluble fertilizer is added in the high-shear zone after the pump; and the readily soluble water-soluble fertilizer and trace elements are precisely injected before and after the static mixer to achieve progressive dissolution.

[0020] The mixture is circulated back in the annular pipeline at a flow rate several times that of the initial solution. Dynamic compensation is achieved through a static mixer and a three-way valve centrifugal pump to ensure the uniformity of concentration throughout the pipeline and improve the stability of the outlet concentration.

[0021] 2. Improved proportioning accuracy and adjustment capability: This application monitors the concentration and liquid level of each dissolving tank in real time, and combines the data from the electromagnetic flowmeter to dynamically adjust the screw pump speed on the control panel, achieving closed-loop control of the entire process;

[0022] Even if a problem occurs in a certain link, it can be corrected by closing the valve connecting that link or by adjusting the links before and after it. The circulation ratio is automatically calculated based on the target concentration, with a short response time and quick correction of concentration deviation.

[0023] 3. Reduced energy consumption and operating costs: This application uses low-power components such as partitioned motors, heating jackets, screw pumps and three-way valve centrifugal pumps to achieve dissolution and proportioning, while existing devices require the use of high-power components such as large agitators in large tanks to facilitate dissolution. The overall energy consumption of this application is lower than that of existing single-stirring devices.

[0024] By adopting a zoned dissolution method, the use of motors and heating jackets in different zones can be adjusted according to the specific situation of water-soluble fertilizers, reducing energy redundancy. In contrast, the addition of poorly soluble water-soluble fertilizers in existing devices forces the entire device to increase energy consumption.

[0025] 4. High space utilization: This application adopts a vertical layered design with an upper dissolving tank, a middle screw pump, and a lower flat circulation device, which reduces the floor space and saves space. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure provided in the embodiments of this application;

[0027] Figure 2 This is a cross-sectional schematic diagram of the dissolving tank provided in an embodiment of this application;

[0028] Figure 3 This is a cross-sectional schematic diagram of the circulation device provided in the embodiments of this application.

[0029] Reference numerals: 1. Support frame; 2. Circulation device; 21. Annular pipe; 22. Three-way valve centrifugal pump; 23. Discharge pipe B; 24. Baffle plate assembly; 25. Water inlet pipe B; 26. Static mixer; 3. Dissolving tank; 31. Water inlet pipe A; 32. Feed hopper; 33. Motor; 34. Reducer; 35. Top cover plate; 36. Cylinder wall; 37. Threaded plate; 38. Conical hopper; 39. Discharge pipe A; 4. Heating device; 41. Heating jacket; 42. Air inlet pipe; 43. Air outlet pipe; 5. Screw pump; 6. 45° elbow; 7. Control panel. Detailed Implementation

[0030] To better understand the technical solutions presented in the embodiments of this application, the working principle of the existing automatic proportioning device for dissolving granular water-soluble fertilizer will be introduced first.

[0031] Multiple granular water-soluble fertilizers are weighed from their respective raw material silos by weighing devices or solid flow meters and then directly enter a common dissolving tank 3. Clean water is injected into the dissolving tank 3, and the agitator inside the tank is driven by a motor 33. The mechanical stirring promotes the mixing and dissolution of the water-soluble fertilizer with the water. Some devices are equipped with heating devices 4 to help improve the dissolution efficiency. After dissolution, the solution is transported to the subsequent stages in batches through pipelines.

[0032] This device relies on a metering device at the feed end for proportioning, a mixer for forced convection to achieve solid-liquid mixing, and a simple program for control. Its core is a "multi-material co-tank - single-time mixing - single-batch output" system, which is simple in structure but suffers from low dissolution efficiency, coarse proportioning, high energy consumption, and large space occupation. This application designs an automatic proportioning device for dissolving granular water-soluble fertilizer to overcome these problems and achieve a fully dissolved, accurately proportioned, energy-saving, and space-saving automatic proportioning process.

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] Please see Figures 1 to 3This utility model provides a technical solution: an automatic proportioning device for dissolving granular water-soluble fertilizer, including a support frame 1 and a circulation device 2. The circulation device 2 includes an annular pipe 21. The bottom end of the support frame 1 is fixedly connected to the annular pipe 21. The annular pipe 21 is annular, which on the one hand provides a closed circulation path for the mixture, allowing the mixture to flow continuously under the drive of the three-way valve centrifugal pump 22 and pass through the dissolving, mixing and detection stages multiple times, ensuring that the difficult-to-dissolve water-soluble fertilizer is fully dissolved and improving the mixing uniformity; on the other hand, the annular design is relatively compact and can effectively save space. Combined with the vertical layered design of the upper dissolving unit, the middle control area and the lower flat annular pipe 21, the floor space is reduced; moreover, the annular pipe 21 allows the mixture to form a relatively stable circulation when flowing, which helps the various parts of the mixture to fully contact each other, avoids the formation of mixing dead zones, and further improves the mixing uniformity. One end of the annular pipe 21 is fixedly connected to the inlet end of the three-way valve centrifugal pump 22, and the other end of the annular pipe 21 is fixedly connected to the axial outlet end of the three-way valve centrifugal pump 22. The side outlet end of the three-way valve centrifugal pump 22 is fixedly connected to the outlet pipe B23. The three-way valve centrifugal pump 22 serves as a power source in the annular pipe 21, providing a stable flow rate and pressure for the mixture in the annular pipe 21. On the other hand, it can output the mixture that has reached the target concentration and uniformity. At the same time, the circulation flow rate of the mixture in the annular pipe 21 and the output flow rate of the outlet pipe B23 can be flexibly changed by adjusting the speed of the three-way valve centrifugal pump 22.

[0035] Combined with appendix Figure 3As shown, a guide plate assembly 24 is fixedly connected to the position after the water outlet end of the three-way valve centrifugal pump 22 on the inner side of the annular pipe 21. The guide plate assembly 24 consists of three multi-hole guide plates, each with a circular array of holes. Because the mixed liquid output by the three-way valve centrifugal pump 22 has a high flow velocity and complex flow pattern, turbulence and eddies are prone to occur. The guide plate assembly 24 guides this flow into a more regular flow pattern. On the one hand, this allows the energy of the three-way valve centrifugal pump 22 to more effectively propel the mixed liquid within the annular pipe 21, improving the working efficiency of the three-way valve centrifugal pump 22 and reducing energy consumption. On the other hand, the guide plate assembly 24 performs preliminary pre-mixing and flow pattern adjustment of the mixed liquid, which is beneficial to improving the working efficiency of the static mixer 26. An inlet pipe B25 is connected to the position after the guide plate assembly 24 on the outer side of the annular pipe 21, through which clean water for diluting the mixed liquid is injected. A static mixer 26 is fixedly connected to the inlet pipe B25 on the inner side of the annular pipe 21. As the mixed liquid flows through the static mixer 26, the flow direction is constantly changed, causing the clear water and the mixed liquid to interpenetrate and collide, effectively promoting the uniform mixing of the mixed liquid and clear water. The lower ends of four 45° elbows 6 are fixedly connected to four positions on the upper side of the annular pipe 21. The 45° elbows 6 change the direction of the pipe, realizing a vertical layered design of the middle control zone and the lower flat annular pipe 21, reducing the footprint and saving space. At the same time, by smoothly changing the flow direction of the initial solution at the elbows, the generation of turbulence and eddies is reduced, the impact and energy loss of the initial solution at the bend are reduced, the overall resistance of the pipe system is reduced, the circulation efficiency is improved, and the energy consumption of the three-way valve centrifugal pump 22 is reduced. The upper end of the 45° elbow 6 is fixedly connected to the outlet end of the screw pump 5. The screw pump 5 is adaptable to the characteristics of different water-soluble fertilizers and can stably transport solutions containing particles or with high viscosity that are difficult to dissolve. At the same time, the screw pump 5 can precisely control the amount of initial solution delivered by adjusting the pump speed, providing a stable pressure for the initial solution to enter the annular pipe 21. The upper end of the support frame 1 is fixedly connected to the dissolving tank 3, and the inlet end of the screw pump 5 is fixedly connected to the outlet pipe A39 of the dissolving tank 3.

[0036] Combined with appendix Figure 2As shown, the dissolving tank 3 includes a cylindrical wall 36. The lower end of the cylindrical wall 36 is fixedly connected to the upper end of a conical hopper 38, which guides the initial solution to an outlet pipe A39. The lower end of the conical hopper 38 is fixedly connected to the outlet pipe A39. The upper end of the cylindrical wall 36 is fixedly connected to an upper cover plate 35. A reducer 34 is fixedly connected to the upper surface of the middle position of the upper cover plate 35. The lower surface of a motor 33 is fixedly connected to the upper surface of the reducer 34. The output end of the motor 33 is fixedly connected to the input end of the reducer 34. The reducer 34 and the motor 33 cooperate to adjust the high speed and low torque output of the motor 33 to a low speed and high torque. The lower surface of the middle position of the upper cover plate 35 is rotatably connected to the shaft of a threaded plate 37. The output end of the reducer 34 is fixedly connected to the shaft of the threaded plate 37. The rotation of the threaded plate 37 ensures full contact between the water-soluble fertilizer and the incoming water, accelerating the dissolution process of the water-soluble fertilizer. The upper surface of the upper cover plate 35 is connected through a water inlet pipe A31, through which the water required for the initial dissolution of the water-soluble fertilizer is injected. The upper surface of the cover plate 35 is connected to the feed hopper 32, through which the water-soluble fertilizer enters.

[0037] Furthermore, by designing four sets of dissolving tanks 3, respectively dissolving sparingly soluble water-soluble fertilizers, moderately soluble water-soluble fertilizers, easily soluble water-soluble fertilizers, and trace element water-soluble fertilizers, different dissolving conditions are selected according to the characteristics of different water-soluble fertilizers. By adjusting the power of the motor 33 and the temperature of the heating jacket 41, the dissolving efficiency and mixing uniformity of the water-soluble fertilizers are improved on the one hand, and the overall energy consumption redundancy caused by the addition of sparingly soluble water-soluble fertilizers is reduced on the other hand. At the same time, even if there is a problem in the initial dissolution process of a certain water-soluble fertilizer, the screw pump 5 corresponding to this water-soluble fertilizer can be shut down without affecting the initial dissolution process of other water-soluble fertilizers. After the initial dissolution process of this water-soluble fertilizer is adjusted, the screw pump 5 corresponding to this water-soluble fertilizer can be restarted to enter the annular pipeline 21 for mixing and dilution.

[0038] Combined with appendix Figure 2 As shown, a heating device 4 is fixedly connected to the cylinder wall 36. The heating device 4 includes a heating jacket 41, an air inlet pipe 42, and an air outlet pipe 43. A PID temperature control component is provided on the heating jacket 41. The air inlet pipe 42 is connected to the outer side of the lower end of the heating jacket 41, and the air outlet pipe 43 is connected to the outer side of the upper end of the heating jacket 41. The heating jacket 41 provides a suitable temperature to the solution tank, thereby accelerating the dissolution of water-soluble fertilizer. The PID temperature control system accurately controls the temperature and reduces energy consumption.

[0039] Combined with appendix Figure 2 As shown, a liquid level sensor is fixedly connected to the upper surface of the upper cover plate 35, a conductivity sensor and a temperature sensor are fixedly connected to the inner side of the cylinder wall 36, and a conductivity sensor is fixedly connected to the inner side of the annular pipe 21. The liquid level sensor monitors the liquid level in the solution tank to prevent the solution from overflowing or drying out, ensuring equipment safety; the conductivity sensor monitors the conductivity of the solution to reflect the concentration of water-soluble fertilizer, providing data for accurate proportioning; the temperature sensor monitors the temperature in the solution tank, providing data for the PID temperature control component.

[0040] Combined with appendix Figure 3 As shown, the lower ends of the four 45° elbows 6 are fixedly connected to the upper side of the annular pipe 21 at the following positions: before the suction port of the three-way centrifugal pump 22, after the discharge port of the three-way centrifugal pump 22, before the static mixer 26, and inside the static mixer 26. The initial solution of the sparingly soluble water-soluble fertilizer is added before the suction port of the three-way centrifugal pump 22, where the water flow velocity is relatively low, and the suction force of the pump allows the initial solution of the sparingly soluble fertilizer to come into full contact with the water, which is conducive to slow dissolution and dilution. The initial solution of the moderately soluble water-soluble fertilizer is added after the discharge port of the three-way centrifugal pump 22, where the water flow has a certain pressure and velocity, which can accelerate dissolution and diffusion. The initial solution of the easily soluble water-soluble fertilizer is added before the static mixer 26, where the water flow state before the static mixer 26 can be used to quickly disperse and evenly mix the solution. The initial solution of trace elements is added inside the static mixer 26, where the efficient mixing effect inside the mixer can be used to evenly disperse the trace elements in the solution. By selecting different addition points based on the differences in the solubility of water-soluble fertilizers, it is possible to avoid localized high concentrations and mutual interference dilution caused by premature contact between different initial solutions, thus optimizing the dissolution and mixing effect.

[0041] The inlet pipe B25 is equipped with a flow meter A and a solenoid regulating valve A, and the outlet pipe B23 is equipped with a flow meter B and a solenoid regulating valve B. The flow rates of the inlet pipe B25 and the outlet pipe B23 can be detected and controlled, which facilitates the adjustment of the circulating flow rate and output flow rate at the three-way valve centrifugal pump 22.

[0042] Combined with appendix Figure 1 As shown, a control panel 7 is fixedly connected to the upper surface of the bottom end of the support frame 1. The input end of the control panel 7 is electrically connected to the output end of an external power supply. The input end of the control panel 7 is electrically connected to the output ends of the liquid level sensor, conductivity sensor, temperature sensor, concentration sensor, flow meter A, and flow meter B, respectively. The output end of the control panel 7 is electrically connected to the input ends of the electromagnetic regulating valve A and electromagnetic regulating valve B. The output end of the control panel 7 is electrically connected to the input ends of the motor 33, PID temperature control component, screw pump 5, and three-way valve centrifugal pump 22. The control panel 7 processes sensor data, performs logical analysis and calculation, and adjusts the flow rates of water-soluble fertilizer, influent, initial solution, clear water, and effluent in real time by coordinating the equipment, thereby achieving precise proportioning and automated control.

[0043] The working principle of this automatic proportioning device for dissolving granular water-soluble fertilizer is as follows:

[0044] Different types of water-soluble fertilizers enter their respective dissolving tanks 3 from the feed hopper 32, and the water required for the initial dissolution is injected through the water inlet pipe A31. The motor 33 drives the reducer 34, converting high speed and low torque to low speed and high torque, which in turn rotates the threaded plate 37, ensuring full contact between the water-soluble fertilizer and water and accelerating dissolution. Simultaneously, the heating jacket 41 introduces hot steam through the air inlet pipe 42, and the temperature is precisely controlled using a PID temperature control component, further accelerating the dissolution of the water-soluble fertilizer. The motor 33 speed and the heating jacket 41 temperature can be adjusted according to the different characteristics of the water-soluble fertilizer. A level sensor, conductivity sensor, and temperature sensor monitor the liquid level, water-soluble fertilizer concentration, and temperature in the tanks, respectively, ensuring equipment safety and providing data for subsequent control. The screw pump 5 precisely controls the initial solution delivery rate by adjusting its speed and provides stable pressure to deliver the initial solution through the 45° elbow 6 to the annular pipe 21. The three-way valve centrifugal pump 22 serves as the power source, providing a stable flow rate and pressure for the mixture within the annular pipe 21, ensuring continuous flow of the mixture within the annular pipe 21. The initial solution of sparingly soluble water-soluble fertilizer is added before the suction inlet of the three-way valve centrifugal pump 22, utilizing the lower water flow velocity and pump suction to ensure sufficient contact with water for slow dissolution and dilution. The initial solution of moderately soluble water-soluble fertilizer is added after the discharge outlet of the three-way valve centrifugal pump 22, using the water flow with a certain pressure and velocity to accelerate dissolution and diffusion. The initial solution of readily soluble water-soluble fertilizer is added before the static mixer 26, utilizing the water flow state before the static mixer 26 for rapid dispersion and uniform mixing. The initial solution of trace elements is added inside the static mixer 26, where it is uniformly dispersed in the solution through the efficient mixing action inside the mixer. The guide plate assembly 24 premixes and adjusts the flow pattern of the mixture output from the three-way valve centrifugal pump 22. Clean water is injected through the inlet pipe B25. As it flows through the static mixer 26, the multiple sets of spiral blades inside the static mixer 26 continuously change the flow direction, causing the clean water and the mixture to interpenetrate and collide, achieving efficient and uniform mixing. The flow meter A and solenoid regulating valve A in the inlet pipe B25, and the flow meter B and solenoid regulating valve B in the outlet pipe B23, respectively detect and control the flow rates of the inlet pipe B25 and the outlet pipe B23, so as to facilitate the adjustment of the circulating flow rate and output flow rate at the three-way valve centrifugal pump 22.

[0045] Control panel 7 receives data from level sensors, conductivity sensors, temperature sensors, concentration sensors, flow meters A and B, performs logical analysis and calculations, and controls devices such as solenoid valve A, solenoid valve B, motor 33, PID temperature control components, screw pump 5, and three-way centrifugal pump 22 to adjust the flow rates of water-soluble fertilizer, influent, initial solution, clean water, and effluent in real time, achieving precise proportioning and automated control. The mixed solution that achieves the target concentration and uniformity is output by the three-way centrifugal pump 22 through the outlet pipe B23.

[0046] This application adopts a structure of staged dissolution, point feeding, circulating mixing and intelligent control, which improves dissolution efficiency, proportioning accuracy, energy consumption and space utilization.

[0047] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic proportioning device for dissolving granular water-soluble fertilizer, characterized in that: The utility model provides a kind of circulating device and dissolving tank, including support frame (1) and circulating device (2), the circulating device (2) includes annular pipeline (21), the bottom end of the support frame (1) is fixedly connected annular pipeline (21), one end of the annular pipeline (21) is fixedly connected the water inlet end of three-way valve centrifugal pump (22), the other end of the annular pipeline (21) is fixedly connected the axis water outlet of three-way valve centrifugal pump (22), the side water outlet of three-way valve centrifugal pump (22) is fixedly connected liquid outlet pipe B (23), the position of three-way valve centrifugal pump (22) axis water outlet after the inside of annular pipeline (21) is fixedly connected guide plate group (24), the position of guide plate group (24) after the outside of annular pipeline (21) is through connection water inlet pipe B (25), the position of water inlet pipe B (25) after the inside of annular pipeline (21) is fixedly connected static mixer (26), the lower end of four 45 ° elbow (6) is fixedly connected respectively on the upper side of annular pipeline (21) four positions, the upper end of 45 ° elbow (6) is fixedly connected the water outlet of screw pump (5), the upper end of the support frame (1) is fixedly connected dissolving tank (3), the water inlet end of screw pump (5) is fixedly connected the liquid outlet pipe A (39) of dissolving tank (3).

2. The automatic proportioning device for dissolving granular water-soluble fertilizer according to claim 1, characterized in that: The dissolving tank (3) includes cylinder wall (36), the lower end of the cylinder wall (36) is fixedly connected the upper end of conical hopper (38), the lower end of the conical hopper (38) is fixedly connected liquid outlet pipe A (39), the upper end of the cylinder wall (36) is fixedly connected upper cover plate (35), the upper surface of the middle position of the upper cover plate (35) is fixedly connected speed reducer (34), the upper surface of the speed reducer (34) is fixedly connected the lower surface of motor (33), the output end of the motor (33) is fixedly connected the input end of speed reducer (34), the lower surface of the middle position of the upper cover plate (35) is rotatably connected the rotating shaft of screw plate (37), the output end of the speed reducer (34) is fixedly connected the rotating shaft of screw plate (37), the upper surface of the upper cover plate (35) is through connection water inlet pipe A (31), the upper surface of the upper cover plate (35) is through connection feeding hopper (32).

3. The automatic proportioning device for dissolving granular water-soluble fertilizer according to claim 2, characterized in that: The heating device (4) is fixedly connected on the cylinder wall (36), the heating device (4) includes heating jacket (41), air inlet pipe (42) and air outlet pipe (43), the heating jacket (41) is equipped with PID temperature control assembly, the outside of the lower end of the heating jacket (41) is through connection air inlet pipe (42), the outside of the upper end of the heating jacket (41) is through connection air outlet pipe (43).

4. The automatic proportioning device for dissolving granular water-soluble fertilizer according to claim 3, characterized in that: The upper surface of the upper cover plate (35) is fixedly connected liquid level sensor, the inside of the cylinder wall (36) is fixedly connected conductivity sensor and temperature sensor, the inside of the annular pipeline (21) is fixedly connected concentration sensor.

5. The automatic proportioning device for dissolving granular water-soluble fertilizer according to claim 1, characterized in that: The lower end of the four 45 ° elbow (6) is fixedly connected on the upper side of annular pipeline (21) position respectively: before the suction inlet of three-way valve centrifugal pump (22), after the pressure outlet of three-way valve centrifugal pump (22), before static mixer (26), in static mixer (26).

6. The automatic proportioning device for dissolving granular water-soluble fertilizer according to claim 1, characterized in that: The water inlet pipe B (25) is internally provided with a flow meter A and an electromagnetic regulating valve A, and the liquid outlet pipe B (23) is internally provided with a flow meter B and an electromagnetic regulating valve B.

7. The automatic proportioning device for dissolving granular water-soluble fertilizer according to claim 1, characterized in that: The upper surface of the bottom end of the support frame (1) is fixedly connected with a control panel (7), the input end of the control panel (7) is electrically connected with the output end of an external power supply, the input end of the control panel (7) is electrically connected with the output end of a liquid level sensor, an electric conductivity sensor, a temperature sensor, a concentration sensor, a flow meter A and a flow meter B respectively, the output end of the control panel (7) is electrically connected with the input end of an electromagnetic regulating valve A and an electromagnetic regulating valve B, and the output end of the control panel (7) is electrically connected with the input end of a motor (33), a PID temperature control assembly, a screw pump (5), an electromagnetic regulating valve, a three-way valve and a centrifugal pump (22).

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