CN218981214U

CN218981214U - KDP class crystal growth solution preparation facilities

Info

Publication number: CN218981214U
Application number: CN202223008856.2U
Authority: CN
Inventors: 叶李旺; 庄欣欣; 许智煌
Original assignee: Fujian Institute of Research on the Structure of Matter of CAS
Current assignee: Fujian Institute of Research on the Structure of Matter of CAS
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-05-09
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses a KDP crystal growth solution preparation device, which comprises: the preparation tank assembly comprises a tank body, a tank cover and a feed inlet and a feed outlet which are positioned at the top of the tank cover; the stirring assembly is arranged on the tank cover and extends downwards to the inside of the tank body, and is used for stirring the crystal growth solution so as to promote flow and accelerate the solute dissolution process; the spiral conveying assembly comprises a second motor, a second speed reducer, a second coupler and a spiral shaft, wherein spiral blades are arranged on the cylindrical surface of the spiral shaft, a cylinder body is arranged on the peripheral side of each spiral blade, a discharge hole and a feed inlet are formed in the cylinder body, and a tail supporting structure is arranged at the tail end of the cylinder body. The KDP crystal growth solution preparation device has the advantages that due to the fact that the spiral conveying assembly is arranged, undissolved solutes accumulated in the center of the bottom of the tank body can be conveyed to the upper portion of the tank body in a forced mode, the contact area and the contact time of the undissolved solutes and the solvent are increased, the dissolution duration of the solutes is shortened, the preparation efficiency of the crystal growth solution is improved, and the production cost is reduced.

Description

KDP class crystal growth solution preparation facilities

Technical Field

The application belongs to the technical field of crystal growth equipment, and particularly relates to a KDP crystal growth solution preparation device.

Background

KDP (DKDP) crystals are nonlinear crystal materials with excellent performance, have the characteristics of good ultraviolet permeability, high damage threshold, high birefringence coefficient and the like, and are widely applied to the high-tech fields such as laser frequency conversion, electro-optic modulation, optical rapid switching and the like.

When the existing growing solution preparation device prepares the crystal growing solution, because the solute is granular, the solute density is higher than that of the solvent, and under the existing stirring condition, all undissolved solutes are difficult to suspend in the growing solution, so that a large amount of undissolved solutes are accumulated at the bottom of the preparation tank, the contact area of the solute and the solvent is greatly reduced, the dissolution time is prolonged, and the defects of long preparation period, high production cost and the like of the growing solution are caused. In addition, the preparation device has low heat transfer efficiency, long heating time consumption and high energy consumption; meanwhile, bacteria are easy to grow in the preparation tank, and the quality of the crystal growth solution is reduced.

Disclosure of Invention

In order to overcome the problems of the prior growing solution preparation device, the utility model provides a KDP crystal growing solution preparation device which is beneficial to improving the preparation efficiency and quality of the crystal growing solution.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a KDP-like crystal growth solution preparing apparatus comprising: the preparation tank assembly comprises a tank body, a tank cover and a feed inlet and a feed outlet; the stirring assembly is arranged on the tank cover and extends downwards to the inside of the tank body, and is configured to stir the crystal growth solution so as to promote flow and accelerate the solute dissolution process; the spiral conveying assembly comprises a second motor, a second speed reducer, a second coupler and a spiral shaft, spiral blades are arranged on the cylindrical surface of the spiral shaft, and a cylinder body is arranged on the peripheral side of each spiral blade; the barrel is provided with a discharge hole and a feed inlet, and the tail end of the barrel is provided with a tail support structure.

According to one embodiment of the utility model, the second speed reducer is fixedly arranged in the middle of the groove cover; the second speed reducer is provided with a second motor; the screw shaft is connected with a second speed reducer through a second coupler; the second coupler, the helical blade, the discharge hole, the cylinder body, the feed inlet and the tail support structure are positioned in the groove body.

According to one embodiment of the utility model, the bottom of the tank body is provided with a concave circular table, and the concave circular table is configured to collect undissolved solute to the bottom center of the tank body and then to convey the undissolved solute to a discharge port in a spiral manner through a feed port of the spiral conveying assembly.

According to one embodiment of the utility model, the side surface of the concave circular table is provided with a groove structure, and the bottom end outlet of the groove structure faces the feed inlet of the spiral conveying assembly and is configured to guide undissolved solute to be rapidly collected to the feed inlet of the spiral conveying assembly.

According to one embodiment of the utility model, a concave cylinder is arranged below the bottom surface of the concave round table and is configured to be used for placing a tail support structure of the spiral conveying assembly.

According to one embodiment of the utility model, the groove structures are one or more, and the axis of each groove structure is parallel to or forms a certain angle with the generatrix of the concave round platform; the cross-section of the groove structures independently has a semicircular, semi-elliptical or polygonal structure.

Optionally, the polygonal structure is a regular polygonal structure, a triangular structure, a rectangular or a trapezoidal structure.

According to one embodiment of the utility model, a groove body heat-insulating layer is arranged on the periphery of the groove body; a groove cover heat insulation layer is arranged at the top of the groove cover; a groove body sealing ring is arranged between the groove body and the groove cover; an observation window and an illumination window are arranged on two sides of the groove body; the top of the groove cover is provided with a feeding and discharging hole.

According to one embodiment of the utility model, the stirring assembly comprises a first motor, a first speed reducer, a first coupling, a stirring shaft and a stirring paddle; the first speed reducer is fixedly arranged at the top of the groove cover, and the first motor is arranged on the first speed reducer; the first shaft coupling, the stirring shaft and the stirring paddles are positioned in the tank body; the stirring shaft is connected with the first speed reducer through the first coupling, and the stirring paddle is fixedly connected with the lower end of the stirring shaft.

According to one embodiment of the utility model, the KDP-type crystal growth solution preparation device further comprises a temperature control component, wherein the temperature control component comprises a temperature controller, a temperature sensor and an electric heating pipe; the temperature sensor is arranged at the top of the tank cover and penetrates through the tank cover to extend into the tank body; the electric heating pipe is arranged at the top of the tank cover and penetrates through the tank cover to extend into the tank body; the temperature controller is located at the periphery of the tank body, and the temperature sensor and the electric heating pipe are respectively and electrically connected with the temperature controller.

According to one embodiment of the utility model, the KDP-type crystal growth solution preparation device further comprises a sterilization component, wherein the sterilization component comprises a timing switch controller, an ultraviolet sterilization lamp and a warning lamp; the ultraviolet sterilizing lamp is arranged at the top of the tank cover and penetrates through the tank cover to extend into the tank body, and the warning lamp is arranged at the top of the tank cover; the ultraviolet sterilizing lamp and the warning lamp are respectively and electrically connected with the timing switch controller; the ultraviolet sterilizing lamp is positioned above the crystal growth solution or stretches into the crystal growth solution.

According to one embodiment of the utility model, the KDP-type crystal growth solution preparation device further comprises a monitoring component, wherein the monitoring component comprises a light source, a camera and a monitor; the light source is arranged at the left side of the illumination window; the camera is arranged on the right side of the observation window; the light source and the camera are respectively and electrically connected with the monitor.

The utility model has the beneficial effects that:

compared with the existing growth solution preparation device, the KDP crystal growth solution preparation device provided by the utility model comprises a preparation tank assembly, a stirring assembly, a spiral conveying assembly, a temperature control assembly, a sterilization assembly and a monitoring assembly. The preparation tank assembly is beneficial to guiding undissolved solute to be collected to the feed inlet of the spiral conveying assembly more quickly, so that the collection efficiency is improved; the stirring component can promote the flow of the crystal growth solution, accelerate the dissolution process of the solute and promote the preparation efficiency of the crystal growth solution; the spiral conveying assembly forcedly conveys undissolved solutes accumulated in the center of the bottom of the tank body to the upper part of the tank body, so that the contact area and the contact time of the undissolved solutes and the solvent are increased, the dissolution time of the solutes is shortened, the preparation efficiency of the crystal growth solution is improved, and the production cost is reduced; the built-in electric heating pipe directly heats the crystal growth solution, so that the heating efficiency is improved, and the energy conservation and consumption reduction are facilitated; the sterilization component can effectively kill bacteria, and is beneficial to improving the quality of the crystal growth solution; the monitoring assembly is beneficial to realizing automation and reducing labor intensity.

Drawings

FIG. 1 is a schematic cross-sectional view of a KDP-based crystal growth solution preparing apparatus according to the present utility model;

FIG. 2 is a schematic top view of a KDP-based crystal growth solution preparing apparatus of the present utility model;

FIG. 3 is a partial cross-sectional view of a tank body insulation and a tank cover insulation of the present utility model;

FIG. 4 is a schematic top view of the groove structure of the trough body of the present utility model;

in the figure: 1-a preparation groove component, 11-a groove body, 12-a groove body heat insulation layer, 13-a groove cover, 14-a groove cover heat insulation layer, 15-a groove body sealing ring, 16-an observation window, 17-an illumination window, 18-a feeding and discharging port, 19-an inward concave circular table, 110-an inward concave cylinder, 111-a groove structure, 2-a stirring component, 21-a first motor, 22-a first speed reducer, 23-a first coupling, 24-a stirring shaft and 25-a stirring paddle; the device comprises a 3-spiral conveying assembly, a 31-second motor, a 32-second speed reducer, a 33-second coupler, a 34-spiral shaft, 35-spiral blades, a 36-discharge hole, a 37-cylinder, a 38-feed hole and a 39-tail support structure; 4-temperature control components, 41-temperature controllers, 42-temperature sensors, 43-electric heating pipes, 44-protective sleeves of the temperature sensors and 45-protective sleeves of the electric heating pipes; 5-sterilizing components, 51-timing switch controllers, 52-ultraviolet sterilizing lamps and 53-warning lamps; 6-monitor assembly, 61-light source, 62-camera, 63-monitor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and examples. It should be emphasized that the specific embodiments described herein are merely illustrative of some, but not all embodiments of the utility model, and are not intended to limit the utility model. Further, technical features relating to the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

Referring to fig. 1-2 in combination, the kdp-like crystal growth solution preparing apparatus includes a preparing tank assembly 1, a stirring assembly 2, a screw transporting assembly 3, a temperature control assembly 4, a sterilization assembly 5, and a monitoring assembly 6. The preparation tank assembly 1 comprises a tank body 11, a tank cover 13 and a feed and discharge port 18 positioned at the top of the tank cover 13. The periphery of the tank body 11 is provided with a tank body heat preservation layer 12, and the top of the tank cover 13 is provided with a tank cover heat preservation layer 14.

Preferably, as shown in fig. 3, the heat-insulating layer of the tank body and the heat-insulating layer of the tank cover are of a three-layer structure, the outer layer is enclosed by plastic to form a closed space, and the inside of the closed space is filled with heat-insulating materials. The heat preservation layer not only can play a role in heat insulation, heat preservation, energy conservation and consumption reduction, but also can prevent scalding caused by mistaken touch of personnel. The plastic is selected from polyvinyl chloride, polypropylene or polytetrafluoroethylene, and the heat insulation material is selected from polyurethane, composite silicate or rubber-plastic sponge. For example, the outer layer is surrounded by polyvinyl chloride to form an enclosed space, and polyurethane is filled in the enclosed space.

As shown in fig. 1, a groove body sealing ring 15 is arranged between the groove body 11 and the groove cover 13, and the groove body sealing ring 15 is made of rubber. Preferably the rubber is selected from nitrile rubber, fluororubber or silicone rubber. For example, the groove body sealing ring is made of fluororubber or silicon rubber. The two sides of the tank body 11 are provided with an observation window 16 and an illumination window 17, and the observation window 16 and the illumination window 17 can be arranged in one or a plurality according to the requirement.

As shown in fig. 1, the bottom of the tank body 11 is provided with a concave circular table 19, the concave circular table 19 is favorable for collecting undissolved solutes towards the bottom center of the tank body 11, the undissolved solutes collected at the bottom center of the tank body 11 are spirally conveyed to a discharge port 36 through a feed port 38 of the spiral conveying assembly 3, the undissolved solutes slide down along the discharge port 36, when the undissolved solutes gradually settle down to the concave circular table 19 under the action of gravity, buoyancy and fluid resistance, the undissolved solutes slide down to the bottom center of the tank body 11 along the side surface of the concave circular table 19, are collected to the feed port 38 of the spiral conveying assembly 3, enter the feed port 38 of the spiral conveying assembly 3 again for lifting, and thus the cycle is repeated, the undissolved solutes are not always accumulated at the bottom of the tank body 11, the contact area and the contact time of the undissolved solutes with the solvent are increased, the dissolution duration of the solutes is shortened, the preparation efficiency is improved, and the production cost is reduced.

As shown in fig. 1 and 4, the side surface of the concave circular table 19 is provided with a groove structure 111, and the bottom surface of the concave circular table 19 is provided with a concave cylinder 110 for placing the tail support structure 39 of the spiral conveying module 3. The number of groove structures 111 is not limited by the present utility model, and preferably 2, and the axis of each groove structure 111 is parallel or at an angle to the generatrix of the concave circular table 19. The bottom end outlet of the groove structure 111 is directed towards the feed opening 38 of the screw conveyor assembly 3, the cross section of the groove structure 111 independently having a semi-circular, semi-elliptical or polygonal structure, preferably semi-circular. The provision of the groove structure 111 helps to direct undissolved solute more rapidly towards the feed opening 38 of the screw conveyor assembly 3.

Preferably, the polygonal structure is a regular polygonal structure, a triangular structure, a rectangular or a trapezoidal structure.

As shown in fig. 1, the stirring assembly 2 includes a first motor 21, a first decelerator 22, a first coupling 23, a stirring shaft 24, and a stirring paddle 25. The first decelerator 22 is fixedly installed at the top of the slot cover 13. The first speed reducer 22 is provided with a first motor 21, and a stirring shaft 24 is connected with the first speed reducer 22 through a first coupling 23. The stirring paddle 25 is fixedly connected to the lower end of the stirring shaft 24, and the first coupling 23, the stirring shaft 24 and the stirring paddle 25 are located in the tank 11. Alternatively, the paddles 25 may be a push impeller or a turbine impeller. The stirring component 2 can promote the flow of the crystal growth solution, accelerate the dissolution process of the solute and promote the preparation efficiency of the solution.

As shown in fig. 1 and 2, screw conveyor assembly 3 includes a second motor 31, a second decelerator 32, a second coupling 33, a screw shaft 34, screw blades 35, a discharge port 36, a cylinder 37, a feed port 38, and a tail support structure 39. The second speed reducer 32 is fixedly installed in the middle of the slot cover 13, and the second motor 31 is arranged on the second speed reducer 32. The screw shaft 34 is connected to the second decelerator 32 through the second coupling 33; the helical blades 35 are disposed on the cylindrical surface of the helical shaft 34.

The periphery of the helical blade 35 is provided with a cylinder 37, the upper part of the cylinder 37 is provided with a discharge hole 36, the lower part is provided with a feed inlet 38, and the tail end of the cylinder 37 is provided with a tail support structure 39. The second coupling 33, screw shaft 34, screw blade 35, discharge port 36, cylinder 37, feed port 38 and tail support structure 39 are located inside the tank 11.

The number of the discharge ports 36 and the feed ports 38 is not limited in the present utility model, and may be set according to actual requirements. Optionally, the number of the discharge ports and the feed ports is 1, 2 or more. Further, the number of the discharge ports and the feed ports is 2 to 6, for example, the number of the discharge ports and the feed ports is 4. The number of the discharge ports is too small, more discharge ports are beneficial to the undissolved solute to be dispersed uniformly to the periphery, the contact area and the contact time of the undissolved solute and the solvent are increased, the dissolution time of the solute is shortened, and the preparation efficiency is improved.

As shown in fig. 1, the temperature control assembly 4 includes a temperature controller 41, a temperature sensor 42, and an electric heating pipe 43. The temperature sensor 42 and the electric heating pipe 43 are both disposed on the top of the tank cover 13 and extend into the tank body 11 through the tank cover 13. The temperature sensor 42 and the electric heating tube 43 are respectively and electrically connected with the temperature controller 41, and the temperature controller 41 is positioned at the periphery of the tank 11.

The present utility model is not particularly limited in the arrangement position and number of the electric heating pipes as long as it can heat the solution without affecting the normal operation of other components, for example, the number of the electric heating pipes is 1, 2 or more. Preferably, the number of the electric heating pipes 43 is 2, and two electric heating pipes 43 are symmetrically arranged in the tank 11. The utility model adopts the built-in electric heating pipe to directly heat the solution, improves the utilization rate of heat energy, and is beneficial to energy conservation and consumption reduction.

The temperature sensor and the electric heating pipe are respectively sleeved with a temperature sensor protection sleeve 44 and an electric heating pipe protection sleeve 45. Optionally, the thermocouple model of the temperature sensor is PT100 or PT1000.

As shown in fig. 1, the sterilizing module 5 includes a timing switch controller 51, an ultraviolet sterilizing lamp 52, and a warning lamp 53. The ultraviolet sterilizing lamp 52 is arranged at the top of the tank cover 13 and penetrates through the tank cover 13 to extend into the tank body 11; the warning lamp 53 is provided at the top of the slot cover. The ultraviolet germicidal lamp 52 and the warning lamp 53 are respectively electrically connected with the timing switch controller 51. The ultraviolet germicidal lamp 52 can effectively kill bacteria, thereby improving the quality of the crystal growth solution.

In practice, the ultraviolet germicidal lamp 52 may be extended into the crystal growth solution to increase the efficiency of killing bacteria, which is beneficial to improving the quality of the crystal growth solution. The timing switch controller 51 can flexibly control the service time of the ultraviolet germicidal lamp 52 according to the requirement, thereby not only meeting the sterilization purpose, but also prolonging the service life of the ultraviolet germicidal lamp 52. The warning lamp 53 and the ultraviolet sterilizing lamp 52 work synchronously, play a role in warning, ensure the safety of personnel and prevent the human body from being damaged by ultraviolet rays.

The monitoring assembly 6 includes a light source 61, a camera 62 and a monitor 63. The light source 61 is arranged on the left side of the illumination window 17, the light source 61 may be an incandescent lamp or an LED lamp, and the camera 62 is arranged on the right side of the viewing window 16. The light source 61 and the camera 62 are electrically connected to the monitor 63, respectively. The utility model is provided with the monitoring component 6, thereby being beneficial to realizing automation and reducing labor intensity.

The materials of the tank 11, the tank cover 13, the first coupling 23, the stirring shaft 24, the stirring paddle 25, the second coupling 33, the screw shaft 34, the screw blade 35, the discharge port 36, the cylinder 37, the feed port 38, the tail support structure 39, the protective sleeve 44 of the temperature sensor, and the protective sleeve 45 of the electric heating pipe used in the present utility model may be metals. Stainless steel, aluminum alloy, magnesium alloy or titanium alloy is preferable, and is, for example, stainless steel or aluminum alloy.

According to the embodiment of the present utility model, the surfaces of the tank 11, the tank cover 13, the first coupling 23, the stirring shaft 24, the stirring paddle 25, the second coupling 33, the screw shaft 34, the screw blade 35, the discharge port 36, the cylinder 37, the feed port 38, the tail support structure 39, the protective sleeve 44 of the temperature sensor, and the protective sleeve 45 of the electric heating pipe are provided with a corrosion preventing film made of a material selected from PTFE (polytetrafluoroethylene), FEP (fluorinated ethylene propylene copolymer), PFA (soluble polytetrafluoroethylene) or ETFE (ethylene-tetrafluoroethylene copolymer), for example, the corrosion preventing film is formed by uniformly spraying PTFE. The sprayed anticorrosive film can prevent bare metal from being corroded by the crystal growth solution and protect the crystal growth solution from being polluted.

According to an embodiment of the utility model, the KDP-type crystal is a KDP, ADP, DKDP or DADP crystal.

The utility model also provides a method for preparing KDP crystal growth solution by adopting the KDP crystal growth solution preparation device, which comprises the following steps:

1) 173.2kg of solvent (ultrapure water, resistivity 18.2mΩ×cm) was added from the feed inlet 18;

2) 69.9kg of solute (KDP) is added from the feed inlet 18;

3) Starting the stirring assembly 2 to stir the solution;

4) Starting the spiral conveying assembly 3 to convey undissolved solute;

5) Starting a temperature control assembly 4, and setting a control temperature of 60 ℃;

6) Starting the sterilization assembly 5, setting a timing switch controller 51, and stopping 1H when the ultraviolet sterilization lamp 52 and the warning lamp 53 run for 1H;

7) Starting a monitoring assembly 6 according to the requirement, and checking the running condition of the crystal growth solution preparation device and the preparation progress of the crystal growth solution;

8) And closing the spiral conveying assembly 3 after the solute is completely dissolved.

Example 2

In this embodiment, the number of groove structures 111 of the concave round table 19 of the KDP crystal growth solution preparing device is 4; the cross section of the groove structure 111 is semi-elliptical; the groove body heat preservation layer 12 and the groove cover heat preservation layer 14 are of three-layer structures, the outer layer is enclosed by polypropylene to form an enclosed space, and composite silicate is filled in the enclosed space; the groove body sealing ring 15 is made of silicon rubber; the stirring paddle 25 is a turbine impeller; the number of the discharge holes 36 and the feed holes 38 of the spiral conveying assembly 3 is 4; the thermocouple model of the temperature sensor 42 of the temperature control component 4 is PT1000; the number of the electric heating pipes 43 of the temperature control assembly 4 is 4; the ultraviolet sterilizing lamp 52 of the sterilizing module 5 is positioned above the solution; the light source 61 of the monitoring component 6 is an LED lamp; the tank body 11, the tank cover 13, the first coupling 23, the stirring shaft 24, the stirring paddle 25, the second coupling 33, the screw shaft 34, the screw blade 35, the discharge port 36, the cylinder 37, the feed inlet 38, the tail support structure 39, the protection sleeve 44 of the temperature sensor and the protection sleeve 45 of the electric heating pipe are made of aluminum alloy; the surfaces of the tank body 11, the tank cover 13, the first coupler 23, the stirring shaft 24, the stirring paddle 25, the second coupler 33, the screw shaft 34, the screw blade 35, the discharge port 36, the cylinder 37, the feed inlet 38, the tail support structure 39, the protective sleeve 44 of the temperature sensor and the protective sleeve 45 of the electric heating pipe are uniformly sprayed with PFA anti-corrosion films.

The utility model also provides a method for preparing ADP crystal growth solution by adopting the KDP crystal growth solution preparation device, which comprises the following steps:

1) 100kg of solvent (ultrapure water, resistivity 18.2mΩ×cm) was added from the feed inlet 18;

2) 81.8kg of solute (ADP) was added from the inlet/outlet 18;

3) Starting the stirring assembly 2 to stir the solution;

4) Starting the spiral conveying assembly 3 to convey undissolved solute;

5) Starting a temperature control assembly 4, and setting a control temperature of 50 ℃;

6) The sterilization component 5 is started, a timing switch controller 51 is arranged, and each time the ultraviolet sterilization lamp 52 and the warning lamp 53 run for 0.5H, the sterilization component stops for 0.5H;

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.

Claims

1. A KDP-like crystal growth solution dispensing apparatus comprising:

the preparation tank assembly (1), wherein the preparation tank assembly (1) comprises a tank body (11), a tank cover (13) and a feed inlet and discharge port (18) positioned at the top of the tank cover (13);

a stirring assembly (2) arranged on the tank cover (13) and extending downwards to the inside of the tank body (11) and configured to stir the crystal growth solution so as to promote flow and accelerate the solute dissolution process; and

the spiral conveying assembly (3), the spiral conveying assembly (3) comprises a second motor (31), a second speed reducer (32), a second coupler (33) and a spiral shaft (34), spiral blades (35) are arranged on the cylindrical surface of the spiral shaft (34), and a cylinder body (37) is arranged on the peripheral side of the spiral blades (35); the cylinder body (37) is provided with a discharge hole (36) and a feed hole (38), and the tail end of the cylinder body is provided with a tail support structure (39).

2. The KDP-like crystal growth solution preparing apparatus according to claim 1, wherein the second decelerator (32) is fixedly installed in the middle of the tank cover (13); a second motor is arranged on the second speed reducer (32); the screw shaft (34) is connected with a second speed reducer (32) through a second coupler (33); the second coupler, the helical blade, the discharge hole, the cylinder body, the feed inlet and the tail support structure are positioned in the groove body.

3. The apparatus for preparing a KDP-type crystal growth solution according to claim 1, wherein,

the bottom of the tank body (11) is provided with a concave circular table (19) which is configured to collect undissolved solute towards the bottom center of the tank body (11) and then to screw and transport the undissolved solute to a discharge hole (36) through a feed hole (38) of the screw and transport assembly (3).

4. The apparatus for preparing a KDP-type crystal growth solution according to claim 3, wherein,

the side of the concave circular table (19) is provided with a groove structure (111), and a bottom end outlet of the groove structure (111) faces to a feed inlet of the spiral conveying assembly (3) and is configured to guide undissolved solutes to be rapidly collected to the feed inlet of the spiral conveying assembly (3).

5. A KDP-like crystal growth solution dispensing device according to claim 3, characterized in that the concave cylinder (110) is arranged under the bottom surface of the concave circular table (19) and is configured as a tail support structure for the screw conveyor assembly (3).

6. The device for preparing a KDP-like crystal growth solution according to claim 4, wherein the number of groove structures (111) is one or more, and the axis of each groove structure (111) is parallel to or at an angle to the generatrix of the concave circular table (19); the cross-section of the groove structures (111) independently has a semi-circular, semi-elliptical or polygonal structure.

7. The apparatus for preparing a KDP-type crystal growth solution according to claim 1, wherein,

a groove body heat preservation layer (12) is arranged on the periphery of the groove body (11); a groove cover heat insulation layer (14) is arranged at the top of the groove cover (13); a groove body sealing ring (15) is arranged between the groove body (11) and the groove cover (13);

an observation window (16) and an illumination window (17) are arranged on two sides of the groove body (11); the top of the groove cover (13) is provided with a feeding and discharging hole (18).

8. The KDP-like crystal growth solution preparing device according to claim 1, wherein the stirring assembly (2) comprises a first motor (21), a first reducer (22), a first coupling (23), a stirring shaft (24) and a stirring paddle (25);

the first speed reducer (22) is fixedly arranged at the top of the groove cover (13), and the first motor is arranged on the first speed reducer (22); the first coupling (23), the stirring shaft (24) and the stirring paddle (25) are positioned in the tank body;

the stirring shaft (24) is connected with the first speed reducer (22) through the first coupling (23), and the lower end of the stirring shaft (24) is connected with a stirring paddle (25).

9. The KDP-like crystal growth solution preparing device according to claim 1, further comprising a temperature control assembly (4), the temperature control assembly (4) comprising a temperature controller (41), a temperature sensor (42) and an electric heating tube (43);

the temperature sensor (42) is arranged at the top of the tank cover (13) and penetrates through the tank cover (13) to extend into the tank body (11);

the electric heating pipe (43) is arranged at the top of the tank cover (13) and penetrates through the tank cover to extend into the tank body (11);

the temperature controller (41) is located at the periphery of the groove body (11), and the temperature sensor (42) and the electric heating pipe (43) are respectively and electrically connected with the temperature controller (41).

10. The KDP-like crystal growth solution preparing device according to claim 1, further comprising a sterilizing assembly (5), the sterilizing assembly (5) comprising a timing switch controller (51), an ultraviolet sterilizing lamp (52) and an alarm lamp (53);

the ultraviolet sterilizing lamp (52) is arranged at the top of the tank cover (13) and penetrates through the tank cover (13) to extend into the tank body, and the warning lamp (53) is arranged at the top of the tank cover (13);

the ultraviolet sterilizing lamp (52) and the warning lamp (53) are respectively and electrically connected with the timing switch controller (51); the ultraviolet sterilizing lamp (52) is positioned above the crystal growth solution or stretches into the crystal growth solution;

the KDP crystal growth solution preparation device also comprises a monitoring component (6), wherein the monitoring component (6) comprises a light source (61), a camera (62) and a monitor (63);

the light source (61) is arranged at the left side of the illumination window (17); the camera (62) is arranged on the right side of the observation window (16); the light source (61) and the camera (62) are respectively and electrically connected with the monitor (63).