Automatic stirring device for water-soluble fertilizer production

Abstract

The present application relates to a kind of automatic stirring device of water-soluble fertilizer production, belong to water-soluble fertilizer production technical field.The first stirring tank, the high-position tank concentration sensor of measuring liquid concentration in tank is installed in the upper portion of the first stirring tank, the mid-position tank concentration sensor of measuring liquid concentration in tank is installed in the middle portion of the first stirring tank, the low-position tank concentration sensor of measuring liquid concentration in tank is installed in the bottom of the first stirring tank.The beneficial effect: the outer wall of the first stirring tank is provided with outer circulating mechanism for circulating mixed liquid in the middle portion of the first stirring tank to the upper portion of the first stirring tank and / or the lower portion of the first stirring tank, and the mixed liquid is introduced into the first stirring tank again for stirring, and the mixed liquid is circulated by circulation pump, so that the mixing efficiency is effectively improved, and the mixing effect is better.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of water-soluble fertilizer production automatic stirring device, belong to water-soluble fertilizer production technical field. BACKGROUND

[0002] Water-soluble fertilizer refers to the complete solubility in water multi-element compound fertilizer, it is a kind of quick-acting fertilizer, water-soluble, no residue, can be completely dissolved in water, can be directly absorbed by crop root system and leaf surface;With water and fertilizer, water brings fertilizer, realizes water and fertilizer integration, its effective absorption rate is more than one times of ordinary chemical fertilizer, reaches 80%-90%;And fast-acting, can solve the nutrient demand of high-yield crop rapid growth period.

[0003] Patent No. CN202120692422.5 discloses a kind of water-soluble fertilizer production stirring device, including stirring main part, the top of the one side of stirring main part is fixed with first support plate, can provide support for measuring cylinder, the top of first support plate is provided with measuring cylinder, the outer surface of measuring cylinder is provided with scale line, to facilitate user to the amount of water-soluble fertilizer liquid material, the bottom of the inner side of measuring cylinder is provided with valve, the side of valve is provided with flow pipe, the top of the other side of stirring main part is fixed with second support plate, can better support weighing scale and weighing end, the side of the top of second support plate is provided with first positioning plate, the inner side of first positioning plate is provided with weighing end, the bottom of weighing end is provided with weighing scale.It can be seen that the following defects exist in use:

[0004] At present, the stirring device for water-soluble fertilizer production used in the market mostly cannot well fully stir the raw materials for producing water-soluble fertilizer, so as to cause poor mixing effect of the raw materials for producing water-soluble fertilizer, and the hysteresis of concentration detection also affects the constancy of water-soluble fertilizer concentration, causes the concentration to be high and low, affects precision fertilization, and to a certain extent, makes the precision of water-soluble fertilizer production lower. SUMMARY

[0005] According to the above deficiencies in the prior art, the technical problem to be solved by the present application is to solve one of the above problems, provide a kind of water-soluble fertilizer production automatic stirring device, the outer wall of first stirring tank is provided with outer circulation mechanism for circulating mixed liquid in the middle of first stirring tank to the upper part of first stirring tank and / or the lower part of first stirring tank, and then introduced into first stirring tank for stirring, and the mixed liquid is circulated by circulation pump, which effectively improves the mixing efficiency and the mixing effect is better.

[0006] The automatic stirring device for water-soluble fertilizer production has the characteristics that the first stirring tank is provided with a high-position tank-in-concentration sensor for measuring the liquid concentration in the tank, a middle-position tank-in-concentration sensor for measuring the liquid concentration in the tank and a low-position tank-in-concentration sensor for measuring the liquid concentration in the tank, the outer wall of the first stirring tank is provided with an outer circulation mechanism for circulating the mixed liquid in the middle part of the first stirring tank to the upper part and / or the lower part of the first stirring tank, and the mixed liquid is introduced into the first stirring tank again for stirring, so that the mixing efficiency is effectively improved and the mixing effect is better.

[0007] Further, the outer circulation mechanism comprises an upper layer circulation pipe provided on the upper part of the first stirring tank and connected with the inner cavity of the first stirring tank, a middle layer circulation pipe provided on the middle part of the first stirring tank and connected with the inner cavity of the first stirring tank, and a lower layer circulation pipe provided on the lower part of the first stirring tank and connected with the inner cavity of the first stirring tank, one end of the upper layer circulation pipe and the middle layer circulation pipe is connected with the first communication pipe, one end of the middle layer circulation pipe and the lower layer circulation pipe is connected with the second communication pipe, a stop valve A and a stop valve B are respectively arranged on the first communication pipe and the second communication pipe, a second circulation pump is connected with the stop valve A in parallel, the water inlet and the water outlet of the second circulation pump are respectively connected with two ends of the stop valve A in communication, a third circulation pump is connected with the stop valve B in parallel, the water inlet and the water outlet of the third circulation pump are respectively connected with two ends of the stop valve B in communication, a first hydraulic control check valve is arranged on the middle layer circulation pipe, a first circulation pump is arranged on the middle layer circulation pipe at the water inlet side of the first hydraulic control check valve, a second hydraulic control check valve and a third hydraulic control check valve are respectively arranged on the upper layer circulation pipe and the lower layer circulation pipe, the hydraulic control ports of the second hydraulic control check valve and the third hydraulic control check valve are connected with the water outlet side of the first hydraulic control check valve and the first circulation pump through a hydraulic control pipe, and the second hydraulic control check valve.

[0008] Further, the upper tank concentration sensor arranged in the upper part of the first stirring tank measures the concentration of the liquid in the tank, and obtains the upper end concentration P. The upper tank concentration sensor arranged in the upper part of the first stirring tank measures the concentration of the liquid in the tank, and obtains the middle concentration Q. The upper tank concentration sensor arranged in the upper part of the first stirring tank measures the concentration of the liquid in the tank, and obtains the lower end concentration T. The concentration standard value of the fertilizer is Y. The upper end concentration P, the middle concentration Q, and the lower end concentration T are compared with the concentration Z respectively. The absolute value of the difference is A, B, and C. When the B value is the largest, the first circulating pump, the stop valve A, and the stop valve B are opened. The second hydraulic one-way valve, the first hydraulic one-way valve, and the third hydraulic one-way valve are opened under the action of pressure. The mixed liquid in the first stirring tank is circulated back to the upper part of the first stirring tank through the middle layer circulating pipe, the first communicating pipe, the second communicating pipe, the upper layer circulating pipe, and the lower layer circulating pipe respectively, and is introduced into the first stirring tank again for stirring. The circulating pump is circulated and mixed, which effectively improves the mixing efficiency and the mixing effect is better.

[0009] Further, the upper end concentration P, the middle concentration Q, and the lower end concentration T are compared with the concentration Z respectively. The absolute value of the difference is A, B, and C. When the A value is the largest, the first circulating pump, the stop valve A, and the third circulating pump are opened. The second hydraulic one-way valve, the first hydraulic one-way valve, and the third hydraulic one-way valve are opened under the action of pressure. The mixed liquid in the first stirring tank is circulated back to the upper part of the first stirring tank through the middle layer circulating pipe, the first communicating pipe, and the upper layer circulating pipe. The mixed liquid in the first stirring tank is circulated back to the upper part of the first stirring tank through the lower layer circulating pipe, the third circulating pump, the first communicating pipe, and the upper layer circulating pipe. The mixed liquid is introduced into the first stirring tank again for stirring. The circulating pump is circulated and mixed, which effectively improves the mixing efficiency and the mixing effect is better.

[0010] Further, the upper end concentration P, the middle concentration Q, and the lower end concentration T are compared with the concentration Z respectively. The absolute value of the difference is A, B, and C. When the C value is the largest, the first circulating pump, the stop valve B, and the second circulating pump are opened. The second hydraulic one-way valve, the first hydraulic one-way valve, and the third hydraulic one-way valve are opened under the action of pressure. The mixed liquid in the first stirring tank is circulated back to the upper part of the first stirring tank through the middle layer circulating pipe, the second communicating pipe, and the lower layer circulating pipe. The mixed liquid in the first stirring tank is circulated back to the lower part of the first stirring tank through the upper layer circulating pipe, the second circulating pump, the communicating pipe, and the lower layer circulating pipe. The mixed liquid is introduced into the first stirring tank again for stirring. The circulating pump is circulated and mixed, which effectively improves the mixing efficiency and the mixing effect is better.

[0011] Further, the high-position tank internal concentration sensor, the middle-position tank internal concentration sensor and the low-position tank internal concentration sensor detect the upper end concentration P, the middle concentration Q and the lower end concentration T respectively compared with the concentration Z, and the absolute value difference ratio is A, B and C, when the A, B and C values tend to O, it indicates that the fertilizer concentration in the stirring tank is consistent and reaches the standard, which meets the requirements of fertilization, the first stirring tank, the first circulating pump, the second circulating pump and the third circulating pump are closed, the mixed solution is discharged from the discharge port, and automatic control is realized.

[0012] Further, the first stirring tank comprises a tank body, a power reducer motor is installed on the upper portion of the tank body, the power output of the power reducer motor penetrates into the first stirring tank through the top of the first stirring tank, and the power output shaft of the power reducer motor is rotated through a shaft coupling and the stirring shaft in the first stirring tank, and the tank body is also provided with a material inlet and a material outlet.

[0013] Further, the stirring shaft is sequentially provided with upper layer stirring blades, middle layer stirring blades and lower layer stirring blades from top to bottom, the upper layer stirring blades, the middle layer stirring blades and the lower layer stirring blades are the same in structure and all comprise a left paddle and a right paddle at a certain angle with the left paddle.

[0014] Further, the circulating pump comprises a pump body and a motor for driving the rotation of an impeller in the pump body, and also comprises a pressure-bearing shell, the inside of the pressure-bearing shell is provided with a containing cavity containing the pump body, the pump body is built in the containing cavity, and the pressure-bearing shell is provided with a fluid inlet and a fluid outlet.

[0015] Further, the high-position tank internal concentration sensor, the middle-position tank internal concentration sensor, the low-position tank internal concentration sensor, the first circulating pump, the second circulating pump, the third circulating pump, the stop valve A and the stop valve B are connected with the controller, and the through hole is connected with the controller.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The water-soluble fertilizer production automatic stirring device disclosed by the present application is provided with an outer circulation mechanism on the outer wall of the first stirring tank, which is used for circulating the mixed solution in the middle portion of the first stirring tank to the upper portion and / or the lower portion of the first stirring tank, and then introducing the mixed solution into the first stirring tank again for stirring, so that the mixed solution is circulated by the circulating pump, the mixing efficiency is effectively improved, and the mixing effect is better.

[0018] The water-soluble fertilizer production automatic stirring device, the high-position tank inner concentration sensor, the high-position tank inner concentration sensor and the middle-position tank inner concentration sensor detect the upper end concentration P, the middle concentration Q and the lower end concentration T respectively, and compare with the concentration Z, and the absolute value difference ratio is A, B and C, when the A, B and C values tend to O, it indicates that the fertilizer concentration in the stirring tank is consistent and reaches the standard, meets the fertilization requirements, the first stirring tank, the first circulating pump, the second circulating pump and the third circulating pump are closed, the mixed liquid is discharged from the discharge port, and the automatic control is realized.

[0019] The water-soluble fertilizer production automatic stirring device, the use of the hydraulic control check valve can simultaneously cut off the upper circulating pipe, the middle circulating pipe and the lower circulating pipe when the first circulating pump is not in action, realizes complete closing of the external circulating mechanism, and avoids the problem of external circulation leakage. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0021] Fig. 1 It is a structural schematic diagram of the present application;

[0022] Fig. 2 It is a flow chart of the present application.

[0023] In the drawings: 1, first stirring tank 2, upper circulating pipe 3, middle circulating pipe 4, lower circulating pipe 5, first circulating pump 6, second circulating pump 7, third circulating pump 8, first hydraulic control check valve 9, second hydraulic control check valve 10, third hydraulic control check valve 11, first communication pipe 12, second communication pipe 13, high-position tank inner concentration sensor 14, middle-position tank inner concentration sensor 15, low-position tank inner concentration sensor. DETAILED DESCRIPTION

[0024] The present application will be further described below in combination with the drawings:

[0025] The present application will be further described below in combination with the drawings:

[0026] EMBODIMENT

[0027] As Figs. 1-2The water-soluble fertilizer production automatic stirring device is characterized in that: the water-soluble fertilizer production automatic stirring device comprises a first stirring tank 1, a high-position tank internal concentration sensor 13 for measuring the liquid concentration in the tank installed at the upper part of the first stirring tank 1, a middle-position tank internal concentration sensor 14 for measuring the liquid concentration in the tank installed at the middle part of the first stirring tank 1, and a low-position tank internal concentration sensor 15 for measuring the liquid concentration in the tank installed at the bottom of the first stirring tank 1, an outer circulation mechanism for circulating the mixed liquid in the middle part of the first stirring tank 1 back to the upper part and / or the lower part of the first stirring tank 1 is arranged on the outer wall of the first stirring tank 1, and the mixed liquid is introduced into the first stirring tank 1 again for stirring, so that the mixed liquid is circulated by the circulation pump, the mixing efficiency is effectively improved, and the mixing effect is better.

[0028] Preferably, the outer circulation mechanism comprises an upper layer circulation pipe 2 arranged at the upper part of the first stirring tank 1 and connected with the inner cavity of the first stirring tank 1, a middle layer circulation pipe 3 arranged at the middle part of the first stirring tank 1 and connected with the inner cavity of the first stirring tank 1, and a lower layer circulation pipe 4 arranged at the lower part of the first stirring tank 1 and connected with the inner cavity of the first stirring tank 1, the other end of the upper layer circulation pipe 2 and the middle layer circulation pipe 3 is connected through a first communication pipe 11, the other end of the middle layer circulation pipe 3 and the lower layer circulation pipe 4 is connected through a second communication pipe 12, a stop valve A and a stop valve B are arranged on the first communication pipe 11 and the second communication pipe 12 respectively, a second circulation pump 6 is connected in parallel with the stop valve A, the water inlet and the water outlet of the second circulation pump 6 are connected with the two ends of the stop valve A respectively, a third circulation pump 7 is connected in parallel with the stop valve B, the water inlet and the water outlet of the third circulation pump 7 are connected with the two ends of the stop valve B respectively, a first hydraulic control check valve 8 is installed on the middle layer circulation pipe 3, a first circulation pump 5 is installed on the middle layer circulation pipe 3 at the water inlet side of the first hydraulic control check valve 8, a second hydraulic control check valve 9 and a third hydraulic control check valve 10 are installed on the upper layer circulation pipe 2 and the lower layer circulation pipe 4 respectively, the hydraulic control ports of the second hydraulic control check valve 9 and the third hydraulic control check valve 10 are connected with the water outlet side of the first hydraulic control check valve 8 and the first circulation pump 5 through a hydraulic control pipe, and the second hydraulic control check valve 9.

[0029] Preferably, the in-tank concentration sensor 13 arranged at the upper part of the first stirring tank 1 measures the in-tank concentration of the liquid in the tank to obtain the upper end concentration P, the in-tank concentration sensor 13 arranged at the upper part of the first stirring tank 1 measures the in-tank concentration of the liquid in the tank to obtain the middle concentration Q, and the in-tank concentration sensor 13 arranged at the upper part of the first stirring tank 1 measures the in-tank concentration of the liquid in the tank to obtain the lower end concentration T. The concentration of the fertilizer standard value is Y. Preferably, the upper end concentration P, the middle concentration Q, and the lower end concentration T are compared with the concentration Z respectively, and the absolute value of the difference is A, B, and C. When the B value is the largest, the first circulating pump 5, the stop valve A, and the stop valve B are opened, the second hydraulic one-way valve 9, the first hydraulic one-way valve 8, and the third hydraulic one-way valve 10 are opened under the action of pressure, the mixed liquid in the first stirring tank 1 is circulated back to the upper part of the first stirring tank 1 through the middle layer circulating pipe 3, the first communicating pipe 11, the second communicating pipe 12, the upper layer circulating pipe 2, and the lower layer circulating pipe 4, and is circulated back to the lower part of the first stirring tank 1 through the upper layer circulating pipe 2, the second circulating pump 6, the communicating pipe 12, and the lower layer circulating pipe 4, and is introduced into the first stirring tank 1 again for stirring, and is mixed by circulating through the circulating pump, thereby effectively improving the mixing efficiency and achieving better mixing effect.

[0030] Preferably, the upper end concentration P, the middle concentration Q, and the lower end concentration T are compared with the concentration Z respectively, and the absolute value of the difference is A, B, and C. When the A value is the largest, the first circulating pump 5, the stop valve A, and the third circulating pump 7 are opened, the second hydraulic one-way valve 9, the first hydraulic one-way valve 8, and the third hydraulic one-way valve 10 are opened under the action of pressure, the mixed liquid in the first stirring tank 1 is circulated back to the upper part of the first stirring tank 1 through the middle layer circulating pipe 3, the first communicating pipe 11, and the upper layer circulating pipe 2, and is circulated back to the upper part of the first stirring tank 1 through the lower layer circulating pipe 4, the third circulating pump 7, the first communicating pipe 11, and the upper layer circulating pipe 2, and is introduced into the first stirring tank 1 again for stirring, and is mixed by circulating through the circulating pump, thereby effectively improving the mixing efficiency and achieving better mixing effect.

[0031] Preferably, the upper end concentration P, the middle concentration Q, and the lower end concentration T are compared with the concentration Z respectively, and the absolute value of the difference is A, B, and C. When the C value is the largest, the first circulating pump 5, the stop valve B, and the second circulating pump 6 are opened, the second hydraulic one-way valve 9, the first hydraulic one-way valve 8, and the third hydraulic one-way valve 10 are opened under the action of pressure, the mixed liquid in the first stirring tank 1 is circulated back to the upper part of the first stirring tank 1 through the middle layer circulating pipe 3, the second communicating pipe 12, and the lower layer circulating pipe 4, and is circulated back to the lower part of the first stirring tank 1 through the upper layer circulating pipe 2, the second circulating pump 6, the communicating pipe 12, and the lower layer circulating pipe 4, and is introduced into the first stirring tank 1 again for stirring, and is mixed by circulating through the circulating pump, thereby effectively improving the mixing efficiency and achieving better mixing effect.

[0032] Preferably, the high tank concentration sensor 13, the high tank concentration sensor 13 and the middle tank concentration sensor 14 detect the upper end concentration P, the middle concentration Q and the lower end concentration T respectively compared with the concentration Z, and the absolute value of the difference is A, B and C, when A, B and C tend to O, it indicates that the fertilizer concentration in the stirring tank is consistent and meets the standard, which meets the requirements of fertilization, and the first stirring tank 1, the first circulating pump 5, the second circulating pump 6 and the third circulating pump 7 are closed, the mixed liquid is discharged from the discharge port, and automatic control is realized.

[0033] Preferably, the first stirring tank 1 comprises a tank body, a power reducer motor is mounted on the upper part of the tank body, the power output of the power reducer motor extends into the first stirring tank 1 through the top of the first stirring tank 1, and the power output shaft of the power reducer motor is rotated through a shaft coupling with the stirring shaft in the first stirring tank 1, and the tank body is also provided with a material inlet and a material outlet.

[0034] Preferably, the stirring shaft is sequentially provided with upper stirring blades, middle stirring blades and lower stirring blades from top to bottom, the upper stirring blades, the middle stirring blades and the lower stirring blades are the same in structure, and each comprises a left paddle and a right paddle at a certain angle with the left paddle.

[0035] Preferably, the circulating pump comprises a pump body and a motor for driving the rotation of the impeller in the pump body, and further comprises a pressure-bearing shell, the inside of the pressure-bearing shell is provided with a containing cavity containing the pump body, the pump body is built in the containing cavity, and the pressure-bearing shell is provided with a fluid inlet and a fluid outlet.

[0036] Preferably, the high tank concentration sensor 13, the middle tank concentration sensor 14, the low tank concentration sensor 15, the first circulating pump 5, the second circulating pump 6, the third circulating pump 7, the stop valve A and the stop valve B are connected with the controller, and the through hole is connected with the controller.

[0037] The automatic stirring device for water-soluble fertilizer production provided by the application, the outer wall of the first stirring tank is provided with an outer circulation mechanism for circulating the mixed liquid in the middle of the first stirring tank to the upper part and / or the lower part of the first stirring tank, and the mixed liquid is introduced into the first stirring tank again for stirring, and the mixed liquid is circulated by the circulating pump, so that the mixing efficiency is effectively improved, and the mixing effect is better.

[0038] The automatic stirring device for water-soluble fertilizer production provided by the application, the high tank concentration sensor, the high tank concentration sensor and the middle tank concentration sensor detect the upper end concentration P, the middle concentration Q and the lower end concentration T respectively compared with the concentration Z, and the absolute value of the difference is A, B and C, when A, B and C tend to O, it indicates that the fertilizer concentration in the stirring tank is consistent and meets the standard, which meets the requirements of fertilization, and the first stirring tank, the first circulating pump, the second circulating pump and the third circulating pump are closed, the mixed liquid is discharged from the discharge port, and automatic control is realized.

[0039] The water-soluble fertilizer production automatic stirring device has the liquid control check valve, when the first circulating pump is not in action, the liquid control check valve can simultaneously cut off the upper circulating pipe, the middle circulating pipe and the lower circulating pipe, realizes completely closing the outer circulating mechanism, and avoids the problem of outer circulating leakage.

[0040] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

[0041] The details of the present application not described are well known to those skilled in the art.

Claims

1. An automatic stirring device for water-soluble fertilizer production, characterized in that: The utility model provides a kind of external circulation mechanism, including first stirring tank, install in the high position tank internal concentration sensor of measuring tank internal liquid concentration in the upper part of first stirring tank, install in the mid tank internal concentration sensor of measuring tank internal liquid concentration in the middle part of first stirring tank, install in the low position tank internal concentration sensor of measuring tank internal liquid concentration in the bottom of first stirring tank, the outer wall of first stirring tank is provided with for circulating the mixed solution in the middle part of first stirring tank back to the upper part of first stirring tank and / or the lower part of first stirring tank, is introduced again to first stirring tank to carry out stirring, and the mixed efficiency is effectively improved by circulating pump circulation mixing, and the mixing effect is better, the outer circulation mechanism includes upper layer circulating pipe, the upper part of the first stirring tank is provided with with the upper layer circulating pipe being connected with first stirring tank inner chamber, the middle part of the first stirring tank is provided with with the middle layer circulating pipe being connected with first stirring tank inner chamber, the lower part of the first stirring tank is provided with with the lower layer circulating pipe being connected with first stirring tank inner chamber, the other end of the upper layer circulating pipe and the middle layer circulating pipe is connected by first communication pipe, the other end of the middle layer circulating pipe and the lower layer circulating pipe is connected by second communication pipe, first communication pipe and second communication pipe are respectively provided with stop valve A and stop valve B, and still include the second circulating pump being parallelly connected with stop valve A, the water inlet and the water outlet of the second circulating pump are respectively connected with the two ends of stop valve A, and still include the third circulating pump being parallelly connected with stop valve B, the water inlet and the water outlet of the third circulating pump are respectively connected with the two ends of stop valve B, first hydraulic control check valve is installed on the middle layer circulating pipe, first circulating pump is installed on the middle layer circulating pipe of first hydraulic control check valve water inlet side, second hydraulic control check valve and third hydraulic control check valve are respectively installed on the upper layer circulating pipe and the lower layer circulating pipe, the hydraulic control port of second hydraulic control check valve and third hydraulic control check valve is connected with the water outlet side of first hydraulic control check valve and first circulating pump by hydraulic control pipe, the high position tank internal concentration sensor arranged in the upper part of first stirring tank measures tank internal liquid concentration, obtains upper end concentration P, the mid tank internal concentration sensor arranged in the middle part of first stirring tank measures tank internal liquid concentration, obtains middle part concentration Q, the low position tank internal concentration sensor arranged in the bottom of first stirring tank measures tank internal liquid concentration, obtains lower end concentration T, wherein, the concentration of fertilizer concentration standard value is Y, the upper end concentration P, the middle part concentration Q, the lower end concentration T are compared with concentration Y respectively, and the absolute value of difference is divided into A, B, C, when B value is maximum, then open first circulating pump, stop valve A, stop valve B, second hydraulic control check valve, first hydraulic control check valve and third hydraulic control check valve are opened under the action of pressure, and the mixed solution in first stirring tank is circulated back to the upper part of first stirring tank and the lower part of first stirring tank respectively through middle layer circulating pipe, first communication pipe, second communication pipe, upper layer circulating pipe, lower layer circulating pipe, is introduced again to first stirring tank to carry out stirring, and the mixed efficiency is effectively improved by circulating pump circulation mixing, and the mixing effect is better.

2. The automatic stirring device for water-soluble fertilizer production according to claim 1, characterized in that, The first stirring tank comprises a tank body, a power reducer motor is installed on the upper part of the tank body, the power output shaft of the power reducer motor extends into the first stirring tank through the top of the first stirring tank, the power output shaft of the power reducer motor is rotated through a shaft coupling with the stirring shaft in the first stirring tank, and the tank body is also provided with a material inlet and a material outlet.

3. The automatic stirring device for water-soluble fertilizer production according to claim 2, characterized in that, The upper layer stirring blade, the middle layer stirring blade and the lower layer stirring blade are sequentially arranged on the stirring shaft from top to bottom, and the upper layer stirring blade, the middle layer stirring blade and the lower layer stirring blade are the same in structure and each comprise a left paddle and a right paddle which is at a certain angle with the left paddle.

4. The automatic stirring device for water-soluble fertilizer production according to claim 1, characterized in that, The circulating pump comprises a pump body and a motor for driving rotation of an impeller in the pump body, and further comprises a pressure-bearing shell, an accommodating cavity for accommodating the pump body is arranged in the pressure-bearing shell, and the pump body is arranged in the accommodating cavity; the pressure-bearing shell is provided with a fluid inlet and a fluid outlet.

5. The automatic stirring device for water-soluble fertilizer production according to claim 1, characterized in that, The in-concentration sensors of the high-position tank, the middle-position tank and the low-position tank, the first circulating pump, the second circulating pump, the third circulating pump and the stop valves A and B are connected with the controller and are controlled by the controller.

Images