Vacuum drying device for preparing piperazine phosphate

Abstract

This invention discloses a vacuum drying apparatus for preparing piperazine phosphate, comprising a support arm A, a support arm B, a stirring tank, a reciprocating assembly, a drying assembly, and a stirring assembly. The reciprocating assembly includes an electric push rod and an output shaft, the electric push rod passing through the stirring tank via the output shaft, and the output shaft being movable inside the stirring tank. The drying assembly includes heating rods, both fixed to support arms A and B. The stirring assembly includes a rotating column and a stirring rod, the rotating column being fixedly connected to the stirring rod. This invention uses the reciprocating assembly to drive the drying and stirring assemblies to dynamically traverse the material area, enabling comprehensive material rotation, preventing material accumulation and clumping, and ensuring comprehensive drying of the material. This ensures that the surface and interior of the piperazine phosphate material are heated simultaneously, resulting in uniform drying and guaranteeing product quality.

Description

Technical Field

[0001] This utility model relates to the field of piperazine phosphate preparation technology, specifically a vacuum drying apparatus for preparing piperazine phosphate. Background Technology

[0002] Piperazine phosphate is a drug used to treat ascariasis and pinworm infections in children. It works primarily by inhibiting the neuromuscular activity of the parasites. However, piperazine phosphate has potential neuromuscular toxicity and is therefore contraindicated in patients with hepatic or renal insufficiency, neurological disorders, or epilepsy.

[0003] In industrial preparation, piperazine phosphate is typically a fixed, hydrous crystal before drying, requiring vacuum drying to remove residual moisture. A vacuum drying apparatus for piperazine phosphate preparation is a device used to dry piperazine phosphate under negative pressure. It achieves a rapid, low-temperature, and efficient drying process by lowering the boiling point of water. The apparatus mainly consists of a vacuum system, a heating system, and a drying container. It is suitable for drying heat-sensitive materials and can avoid oxidation and material denaturation at high temperatures.

[0004] Existing vacuum drying equipment for piperazine phosphate preparation generally uses a rake dryer for drying. However, it has some shortcomings in use. First, because the rake teeth of the existing rake dryer are fixed, the material between the two rake teeth cannot be turned over. Second, when the material accumulates between the two rake teeth, it will hinder the heat transfer to the inside of the material, causing the surface to overheat while the inside is underheated, ultimately resulting in uneven drying and affecting product quality. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum drying apparatus for preparing piperazine phosphate.

[0006] The vacuum drying apparatus for preparing piperazine phosphate includes support arm A, support arm B, stirring tank, reciprocating assembly, drying assembly and stirring assembly;

[0007] The reciprocating assembly includes an electric push rod and an output shaft. The electric push rod passes through the mixing tank via the output shaft, and the output shaft can move inside the mixing tank.

[0008] The drying assembly includes a heating rod, and heating rods are fixed on both support arm A and support arm B;

[0009] The stirring assembly includes a rotating column and a stirring rod, with the rotating column and the stirring rod being fixedly connected.

[0010] The above technical solution overcomes the limitations of traditional rake dryers through the synergistic effect of reciprocating components, drying components, and stirring components. The electric push rod drives the output shaft to move back and forth, causing the support arm A, support arm B, heating rod, and stirring component to move synchronously, achieving the dual function of "dynamic heating + multi-dimensional stirring". The heating rod moves through the material area with the support arm A and support arm B, eliminating heating blind spots. The rotating column and stirring rod work together to break up material accumulation, force the material to contact the heating surface, ensure that piperazine phosphate is heated in all directions, and improve drying efficiency and uniformity.

[0011] In a preferred embodiment, the drying assembly includes a fixing block, which is fixedly connected to the output shaft, and a support arm A is fixedly connected to the side of the fixing block.

[0012] In the above technical solution, the fixed block serves as the force transmission hub, with an output shaft fixedly connected to one end and a support arm A on the other side. This stably transmits the reciprocating power of the electric push rod to the support arm A and the heating rod, preventing the parts from becoming loose or shifting during the movement. At the same time, the rigid connection structure of the "output shaft, fixed block, and support arm A" ensures the displacement accuracy of the heating rod, enabling precise matching between the heating area and the stirring area, and enhancing the synergistic effect of drying and stirring.

[0013] In a preferred embodiment, the stirring assembly includes a dual-output shaft motor, one side of which is fixedly connected to support arm A, the other side of which is fixedly connected to support arm B, and the output shaft of which is fixedly connected to a rotating column.

[0014] In the above technical solution, the dual-output shaft motor forms a stable support structure with fixed ends through support arms A and B, which greatly improves the operational stability and avoids material splashing or uneven mixing caused by motor shaking during stirring. At the same time, the dual-output shaft motor can adjust the stirring speed according to the moisture content of the material. In the early stage of drying, when the material moisture content is high, the speed of the dual-output shaft motor is increased to break up the material and make it dry better. In the later stage of drying, the speed of the dual-output shaft motor is reduced to prevent material breakage. The dual-output shaft motor is suitable for the entire drying process of piperazine phosphate. The rotating column directly receives the power of the dual-output shaft motor, reducing transmission loss and ensuring that the stirring rod efficiently flips the material.

[0015] In a preferred embodiment, a vacuum pump is provided on one side of the mixing tank, and the vacuum pump is connected to the mixing tank via a connecting pipe. A filter screen is provided at the air intake of the connecting pipe.

[0016] In the above technical solution, a sealed vacuum environment is constructed between the vacuum pump and the mixing tank through a connecting pipe. Utilizing the principle of "lowering the boiling point of water by reducing gas pressure," low-temperature drying is achieved, preventing piperazine phosphate from oxidizing or denaturing due to high temperatures. The sealed design of the connecting pipe ensures the stability of the vacuum environment. Combined with the low-temperature heat source of the heating rod, a mild drying environment of "vacuum + low-temperature heating" is formed, which meets the drying requirements of the "heat-sensitive" material piperazine phosphate. At the junction of the connecting pipe and the mixing tank, i.e., at the air intake, a filter screen is added to prevent fine materials from being sucked away by the vacuum pump and wasting them, and also to prevent the vacuum pump from being damaged by foreign objects.

[0017] In a preferred embodiment, a feed pipe is provided at the top of the mixing tank, a cover is provided at the top of the feed pipe, and a discharge pipe is provided at the bottom of the mixing tank.

[0018] In a preferred embodiment, both the feed pipe and the discharge pipe are connected to the interior of the mixing tank.

[0019] In the above technical solution, the feed pipe with a cover constitutes a sealed feed unit: the cover is opened to feed material during feeding, and the cover is closed tightly during drying to ensure a vacuum environment. The operation is convenient and the seal is reliable. The bottom discharge pipe realizes automatic unloading after drying, reducing the risk of material contamination and improving production continuity. The feed pipe and discharge pipe are directly connected to the inside of the mixing tank to ensure that the material is processed in a closed manner throughout the entire process. There is no material residue on the wall during feeding, and the material is discharged through the discharge pipe during discharge.

[0020] In a preferred embodiment, a controller is fixed to the side of the mixing tank, and the controller is electrically connected to an electric push rod, a dual-shaft motor, and a heating rod.

[0021] In the above technical solution, the controller acts as the "intelligent hub," integrating the control functions of the electric push rod (reciprocating speed), the dual-output shaft motor (stirring speed), and the heating rod (temperature). It provides real-time feedback on the equipment status through electrical connection, reducing the power of the heating rod when the temperature is too high and stopping the machine and alarming when the stirring is stuck, thereby improving the controllability and safety of the drying process.

[0022] In a preferred embodiment, the bottom of the mixing tank is provided with a support frame, and the mixing tank is fixedly connected to the support frame.

[0023] In the above technical solution, the support frame provides a rigid support structure for the mixing tank. The support frame is used to absorb the vibration generated by the reciprocating electric push rod and the motor stirring, so as to avoid shaking or displacement of the equipment during operation. The bottom support disperses the weight of the equipment, extends the service life of the equipment, and raises the mixing tank to facilitate the connection of the discharge pipe to the collection device and optimize the production layout.

[0024] The beneficial effects of this utility model are:

[0025] 1. This utility model uses an electric push rod to drive the output shaft, which in turn drives the support arm, drying component, and stirring component to move back and forth. In conjunction with the dual-output shaft motor in the stirring component, the rotating column and stirring rod are driven to rotate, thereby realizing multi-dimensional dynamic turning of the material in the mixing tank. This solves the problem that existing rake dryers cannot turn the material between the two rake teeth because the two rake teeth are fixed, ensuring that piperazine phosphate material participates in the drying process without any dead angles.

[0026] 2. This utility model uses a heating rod in the drying component to dynamically traverse the material area along with the support arm, combined with the stirring component to dynamically turn the material, forcing the material to fully contact the heating surface. At the same time, the vacuum environment accelerates the penetration of heat into the material, solving the problem of "overheating of the surface and insufficient heating of the interior" caused by material accumulation in traditional devices. This significantly improves the drying uniformity of piperazine phosphate and ensures product quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a side sectional view of the present invention;

[0029] Figure 3 This is a partially enlarged view of the drying component of this utility model;

[0030] Figure 4 This utility model Figure 3 A magnified view of the stirring assembly at point A in the middle;

[0031] In the diagram: 1. Support frame; 2. Mixing tank; 3. Controller; 4. Feed pipe; 5. Cover; 6. Vacuum pump; 7. Discharge pipe; 8. Electric push rod; 9. Output shaft; 10. Fixing block; 11. Support arm A; 12. Dual-shaft motor; 13. Heating rod; 14. Rotating column; 15. Mixing rod; 16. Support arm B; 17. Connecting pipe; 18. Filter screen. Detailed Implementation

[0032] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0033] According to an embodiment of the present invention, a vacuum drying apparatus for preparing piperazine phosphate is provided.

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, a vacuum drying apparatus for preparing piperazine phosphate according to an embodiment of the present invention includes a support arm A11, a support arm B16, a stirring tank 2, a reciprocating assembly, a drying assembly, and a stirring assembly. The reciprocating assembly includes an electric push rod 8 and an output shaft 9. The electric push rod 8 passes through the stirring tank 2 through the output shaft 9, and the output shaft 9 can move inside the stirring tank 2. The drying assembly includes a heating rod 13, and a heating rod 13 is fixed on both the support arm A11 and the support arm B16. The stirring assembly includes a rotating column 14 and a stirring rod 15, and the rotating column 14 and the stirring rod 15 are fixedly connected. In this embodiment, there are two electric push rods 8, and four heating rods 13 are fixedly connected to both support arms A11 and B16. The number of heating rods 13 can be selected according to the actual application scenario. A sealing ring is set on the output shaft 9 near the outside of the mixing tank 2 to ensure that the inside of the mixing tank 2 is in a sealed vacuum state during the drying process. This application breaks through the limitations of traditional rake dryers by the synergistic action of the reciprocating component, the drying component and the stirring component. The electric push rod 8 drives the output shaft 9 to move back and forth, which drives the support arm A11, the support arm B16, the heating rods 13 and the stirring component to move synchronously, realizing the dual function of "dynamic heating + multi-dimensional stirring". The heating rods 13 traverse the material area with the movement of the support arm A11 and the support arm B16, eliminating heating blind spots. The cooperation between the rotating column 14 and the stirring rod 15 breaks up material accumulation, forces the material to contact the heating surface, ensures that piperazine phosphate is heated in all directions, and improves drying efficiency and uniformity.

[0035] In this embodiment, the drying assembly includes a fixing block 10, which is fixedly connected to the output shaft 9. A support arm A11 is fixedly connected to the side of the fixing block 10. Three support arms A11 are fixedly connected to the side of the fixing block 10, and the number of support arms A11 can be selected according to the actual application scenario. In this application, the fixing block 10 serves as a force transmission hub, with the output shaft 9 fixedly connected to one end and the support arm A11 supported on the other side. This stably transmits the reciprocating power of the electric push rod 8 to the support arm A11 and the heating rod 13, preventing the components from becoming loose or shifting during movement. At the same time, the rigid connection structure of "output shaft 9, fixing block 10, and support arm A11" ensures the displacement accuracy of the heating rod 13, making the heating area and the stirring area precisely matched, and enhancing the synergistic effect of drying and stirring.

[0036] In this embodiment, the stirring assembly includes a dual-shaft motor 12. One side of the dual-shaft motor 12 is fixedly connected to the support arm A11, and the other side is fixedly connected to the support arm B16. The output shaft of the dual-shaft motor 12 is fixedly connected to the rotating column 14. In this application, the dual-shaft motor 12 forms a stable support structure with both ends fixed through the support arms A11 and B16, which greatly improves the operational stability and avoids material splashing or uneven stirring caused by motor shaking during stirring. At the same time, the dual-shaft motor 12 can adjust the stirring speed according to the moisture content of the material. In the early stage of drying, when the moisture content of the material is high, the speed of the dual-shaft motor 12 is increased to disperse the material and make it dry better. In the later stage of drying, the speed of the dual-shaft motor 12 is reduced to avoid material breakage. The dual-shaft motor 12 is suitable for the entire drying process of piperazine phosphate. The rotating column 14 directly receives the power of the dual-shaft motor 12, reducing transmission loss and ensuring that the stirring rod 15 efficiently flips the material.

[0037] In this embodiment, a vacuum pump 6 is provided on one side of the mixing tank 2. The vacuum pump 6 is connected to the mixing tank 2 via a connecting pipe 17, and a filter screen 18 is provided at the air intake of the connecting pipe 17. In this application, the vacuum pump 6 and the mixing tank 2 form a closed vacuum environment through the connecting pipe 17. By utilizing the principle of "lowering the gas pressure to lower the boiling point of water", low-temperature drying is achieved, avoiding the oxidation or denaturation of piperazine phosphate due to high temperature. The sealed design of the connecting pipe 17 ensures the stability of the vacuum environment. Combined with the low-temperature heat source of the heating rod 13, a mild drying environment of "vacuum + low-temperature heating" is formed, which meets the drying requirements of the "heat-sensitive" material piperazine phosphate. At the junction of the connecting pipe 17 and the mixing tank 2, i.e., at the air intake, a filter screen 18 is added to prevent fine materials from being sucked away by the vacuum pump 6 and wasting them, and also to prevent the vacuum pump 6 from being damaged by foreign objects. When vacuum drying the material, piperazine phosphate is first placed in the mixing tank 2, and the vacuum pump 6 is started to extract the air inside the mixing tank 2, so that a vacuum environment is formed inside the mixing tank 2. At this time, the material is dried. During the drying process, the moisture in the material evaporates to form water vapor. The vacuum pump 6 continues to run to extract the water vapor inside the mixing tank 2 and continuously maintain the vacuum environment inside the mixing tank 2.

[0038] In this embodiment, a feed pipe 4 is provided at the top of the mixing tank 2, and a cover 5 is provided at the top of the feed pipe 4. A discharge pipe 7 is provided at the bottom of the mixing tank 2. Both the feed pipe 4 and the discharge pipe 7 are connected to the interior of the mixing tank 2. In this application, the feed pipe 4 and the cover 5 constitute a sealed feeding unit: the cover is opened to feed material during feeding, and the cover 5 is closed tightly during drying to ensure an environmental vacuum, making operation convenient and the seal reliable. A valve is provided at the inlet of the discharge pipe 7 to control the discharge of dried piperazine phosphate. The bottom discharge pipe 7 realizes automatic unloading after drying, reducing the risk of material contamination and improving production continuity. The feed pipe 4 and the discharge pipe 7 are directly connected to the interior of the mixing tank 2 to ensure that the material is processed in a closed loop throughout the entire process. There is no material residue adhering to the wall during feeding, and the material is discharged through the discharge pipe 7 during discharge.

[0039] In this example, a controller 3 is fixed to the side of the mixing tank 2. The controller 3 is electrically connected to the electric push rod 8, the dual-shaft motor 12, and the heating rod 13. In this application, the controller 3 acts as an "intelligent hub," integrating the control functions of the electric push rod 8 (reciprocating speed), the dual-shaft motor 12 (stirring speed), and the heating rod 13 (temperature). It provides real-time feedback on the equipment status through electrical connection, reducing the power of the heating rod 13 when the temperature is too high and stopping the operation and alarming when stirring stagnates, thereby improving the controllability and safety of the drying process.

[0040] In this embodiment, a support frame 1 is provided at the bottom of the mixing tank 2, and the mixing tank 2 is fixedly connected to the support frame 1. In this application, there are two support frames 1, located on both sides of the bottom of the mixing tank 2. The support frame 1 provides a rigid support structure for the mixing tank 2. The support frame 1 is used to absorb the vibration generated by the reciprocating electric push rod 8 and the motor stirring, so as to avoid shaking or displacement of the equipment during operation; by distributing the weight of the equipment through bottom support, the service life of the equipment is extended, and at the same time, the mixing tank 2 is raised to facilitate the connection of the discharge pipe 7 to the collection device and optimize the production layout.

[0041] Working Principle: During use, piperazine phosphate is fed into the mixing tank 2 through the feed pipe 4, and the lid 5 is closed to ensure a seal. The vacuum pump 6 is started by the controller 3, and the air inside the mixing tank 2 is extracted through the connecting pipe 17 to create a negative pressure low-temperature drying environment (by reducing the air pressure inside the mixing tank 2, the boiling point of water is lowered, preventing high-temperature denaturation of the material). Subsequently, the controller 3 synchronously drives the core components to work together: the electric push rod 8 receives the controller command and drives the output shaft 9 to perform axial reciprocating linear motion along the mixing tank 2. The movement of the output shaft 9 drives the fixed block 10, support arm A11, and support arm B16 to move synchronously. At this time, the heating rod 13, the dual-output shaft motor 12, the rotating column 14, and the stirring rod 15 traverse the axial space inside the mixing tank 2 with the support arms, covering areas that traditional fixed rake teeth cannot reach. When the electric push rod 8 receives the command from the controller 3, the heating rod 13 and the dual-axis motor 12 start synchronously. The dual-axis motor 12 drives the rotating column 14 to rotate, and the rotation of the rotating column 14 drives the stirring rod 15 to rotate. Since the rotating column 14 moves in a reciprocating linear motion with the support arm, the stirring rod 15 moves in a reciprocating linear motion while rotating, so that the stirring rod 15 can turn over the material at different axial positions in the mixing tank 2, and can also break up the clumps of material. As the heating rod 13 moves with the support arm, it continuously conducts heat to the surrounding material. In a vacuum environment, the water in the material evaporates rapidly due to the lower boiling point (due to the lower air pressure), and the water vapor is continuously extracted by the vacuum pump 6. The combined motion of the stirring rod 15 increases the contact frequency and area between the material and the heating rod 13, ensuring that the surface and interior of the piperazine phosphate material are heated synchronously and dried evenly. After drying is completed, controller 3 shuts off electric push rod 8, dual-shaft motor 12 and heating rod 13, vacuum pump 6 stops running, and valve at the inlet of discharge pipe 7 is opened. The dried piperazine phosphate is discharged through discharge pipe 7, completing the process.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vacuum drying apparatus for preparing piperazine phosphate, characterized in that, Includes support arm A (11), support arm B (16), mixing tank (2), reciprocating assembly, drying assembly and mixing assembly; The reciprocating assembly includes an electric push rod (8) and an output shaft (9). The electric push rod (8) passes through the mixing tank (2) via the output shaft (9), and the output shaft (9) can move inside the mixing tank (2). The drying assembly includes a heating rod (13), and the heating rod (13) is fixed on both the support arm A (11) and the support arm B (16); The stirring assembly includes a rotating column (14) and a stirring rod (15), wherein the rotating column (14) and the stirring rod (15) are fixedly connected.

2. The vacuum drying apparatus for preparing piperazine phosphate according to claim 1, characterized in that, The drying assembly includes a fixing block (10), which is fixedly connected to the output shaft (9), and a support arm A (11) is fixedly connected to the side of the fixing block (10).

3. The vacuum drying apparatus for preparing piperazine phosphate according to claim 1, characterized in that, The stirring assembly includes a dual-output shaft motor (12), one side of which is fixedly connected to the support arm A (11), and the other side of which is fixedly connected to the support arm B (16). The output shaft of the dual-output shaft motor (12) is fixedly connected to the rotating column (14).

4. The vacuum drying apparatus for preparing piperazine phosphate according to claim 3, characterized in that, A vacuum pump (6) is provided on one side of the mixing tank (2). The vacuum pump (6) is connected to the mixing tank (2) through a connecting pipe (17). A filter screen (18) is provided at the air intake of the connecting pipe (17).

5. The vacuum drying apparatus for preparing piperazine phosphate according to claim 4, characterized in that, The mixing tank (2) is provided with a feed pipe (4) at the top, a cover (5) at the top of the feed pipe (4), and a discharge pipe (7) at the bottom of the mixing tank (2).

6. The vacuum drying apparatus for preparing piperazine phosphate according to claim 5, characterized in that, Both the feed pipe (4) and the discharge pipe (7) are connected to the interior of the mixing tank (2).

7. The vacuum drying apparatus for preparing piperazine phosphate according to claim 6, characterized in that, A controller (3) is fixed to the side of the mixing tank (2), and the controller (3) is electrically connected to the electric push rod (8), the dual-shaft motor (12) and the heating rod (13).

8. The vacuum drying apparatus for preparing piperazine phosphate according to claim 7, characterized in that, The bottom of the mixing tank (2) is provided with a support frame (1), and the mixing tank (2) is fixedly connected to the support frame (1).

Images