Internal circulation evaporator for pharmaceutical liquid preparation system

Abstract

The application provides a pharmaceutical liquid preparation system with an internal circulation evaporator, which comprises an evaporation box, the inside of which is hollow, and the evaporation box is divided into heating cavities, evaporation cavities and condensation cavities which are independent of each other by a lower partition plate and an upper partition plate; the lower partition plate is below the upper partition plate, and the heating cavities, the evaporation cavities and the condensation cavities are distributed from bottom to top in sequence; an electric heating plate in contact with the lower partition plate is fixedly installed in the heating cavity, a feeding pipe in communication with the evaporation cavities is fixedly installed on one side of the evaporation box, a first valve body is installed on the feeding pipe, and a condensation plate for plugging the inside of the condensation cavity is installed in the condensation cavity. The design of the cleaning mechanism, the plugging mechanism and the blowdown port is used, the bottom wall scaling in the evaporation cavity can be cleaned through the cleaning mechanism, the scaling cleaned through the cleaning mechanism can be cleaned through the blowdown port after the plugging mechanism is unplugged, and the mode of disassembling the heat exchanger to clean the scaling is replaced, so that the operation is simple and the workload of the staff is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of evaporator equipment, in particular to an internal circulation evaporator for a pharmaceutical liquid preparation system. BACKGROUND

[0002] A circulation evaporator is a device used for liquid evaporation, commonly used in chemical, pharmaceutical, food processing and other industries. It contacts the liquid to be evaporated with a heat source, allowing it to rapidly vaporize at a relatively low temperature, thereby achieving the separation and concentration of substances. In the Chinese and Western medicine industry, evaporators are often used to evaporate and concentrate solutions.

[0003] The circulation evaporator is an effective device for liquid separation and concentration, but it also has some structural defects. The following are some common problems: 1. Low heat exchange efficiency; 2. Fouling and clogging: during the evaporation process, dissolved substances in the liquid will precipitate and deposit inside the heat exchanger, causing fouling and clogging problems, affecting heat transfer efficiency; 3. Difficult to clean, etc.

[0004] Currently, the circulation evaporator usually adopts the following structure to solve the problem of fouling and clogging inside the heat exchanger: heat exchanger modularization: the entire heat exchanger is divided into multiple modules, facilitating disassembly and cleaning, reducing the difficulty and risk of maintenance, effectively reducing the fouling and clogging inside the circulation evaporator, improving the reliability and service life of the equipment.

[0005] However, there are still some problems in actual use: when cleaning the fouling inside the heat exchanger, the heat exchanger needs to be disassembled and cleaned, which is relatively cumbersome and increases the workload of the workers.

[0006] Therefore, the present application provides an internal circulation evaporator for a pharmaceutical liquid preparation system. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application provides an internal circulation evaporator for a pharmaceutical liquid preparation system, which solves the problems mentioned in the background art.

[0008] To achieve the above purpose, the present application realizes the following technical scheme:

[0009] The internal circulation evaporator for a pharmaceutical liquid preparation system comprises an evaporation box, which is hollow inside, and is divided into heating cavities, evaporation cavities and condensation cavities by lower and upper partitions; the lower partition is below the upper partition, and the heating cavities, evaporation cavities and condensation cavities are distributed from bottom to top in turn.

[0010] An electric heating plate that contacts the lower partition is fixedly installed inside the heating chamber. A feeding pipe that communicates with the evaporation chamber is fixedly installed on one side of the evaporator. A first valve body is installed on the feeding pipe. A condensing plate for sealing the interior is installed inside the condensing chamber. Several air guide holes are opened on the condensing plate. An air guide pipe is fixed outside the evaporator. One end of the air guide pipe passes through the evaporator and is located above the condensing plate. The other end passes through the evaporator and is located below the upper partition.

[0011] A vent pipe is fixedly installed on the upper partition plate to connect the evaporation chamber and the condensation chamber. A drain pipe connected to the condensation chamber is fixed on the evaporator box, and the bottom of the drain pipe is flush with the top of the upper partition plate.

[0012] The evaporator has a drain port on one side that communicates with the interior of the evaporation chamber. The bottom wall of the drain port is flush with the top of the lower partition. The evaporator is equipped with a sealing mechanism for sealing the drain port and a cleaning mechanism for cleaning the bottom wall of the evaporation chamber.

[0013] Furthermore: the blocking mechanism includes:

[0014] There are two guide rods, both of which are vertical and can move through the upper partition. The bottom of the two guide rods is fixed with a sealing plate that fits against the top of the lower partition. When the sealing plate fits against the lower partition, it seals the sewage outlet. An electric push rod is fixedly installed on the upper partition to drive the guide rods to slide.

[0015] The sealing plate has several vertically oriented through holes, and the cleaning mechanism is used to clean the upper surface of the sealing plate and the inside of the through holes.

[0016] Furthermore: the plurality of through holes are divided into multiple groups of perforation units, each perforation unit comprising multiple through holes, the multiple groups of perforation units being arranged in a circular array, and the multiple through holes of the same group of perforation units being arranged in a linear array; the cleaning mechanism includes:

[0017] A rotating rod is vertically mounted on the upper partition plate. A scraper is fixed to the bottom of the rotating rod, and multiple through rods are vertically movably inserted through the scraper. The multiple through rods are arranged in a horizontal linear array. A contact element is installed on the scraper to act on the through rods, which is used to move the through rods downward along the scraper. The through rods can pass through through holes, and the distance between two adjacent through rods is equal to the distance between two adjacent through holes. A drive element is installed on the evaporator to drive the rotating rod to rotate.

[0018] Furthermore: the abutting component includes multiple abutting shells that are fixedly installed on the top of the scraper, multiple through rods that correspond one-to-one with the multiple abutting shells, and multiple through rods that movably pass through the bottom of the abutting shells respectively, and springs are installed inside the abutting shells and on the opposite side of the abutting shells and through rods.

[0019] Furthermore: the driving component includes a rotating rod that is horizontally rotatably mounted on the evaporator, one end of which extends into the condensation chamber and is connected to the rotating rod via a bevel gear assembly, and a motor for driving the rotating rod to rotate is fixedly mounted on the outside of the evaporator.

[0020] Furthermore: a fixing plate that fits against the top of multiple abutment shells is fixedly installed on the rotating rod, and multiple horizontal plates are fixed in a linear array on the rotating rod and above the fixing plates.

[0021] Furthermore: the top of the upper partition plate is inclined downward along the drain outlet direction, and an air blowing mechanism is installed on the evaporator box on the side away from the drain outlet, which is used to blow the scale on the top of the upper partition plate towards the drain outlet.

[0022] Furthermore: the blowing mechanism includes:

[0023] A vent hood is provided on the evaporator, with an air inlet on the side away from the drain outlet. The vent hood is fixed inside the air inlet and blocks the air inlet. The vent hood has multiple air outlets that are connected to the evaporator chamber. An air inlet pipe that is connected to the interior of the vent hood is fixedly installed on the vent hood, and a second valve body is installed on the air inlet pipe.

[0024] Furthermore: when the sealing plate is in contact with the lower partition, multiple air vents extend above the sealing plate; a one-way valve is fixedly installed inside the air vent; the air vent is divided into straight holes and oblique holes, with oblique holes spaced apart between two adjacent straight holes.

[0025] Furthermore: the evaporator is equipped with a slot that communicates with the interior of the condensing chamber, the condensing plate is inserted into the condensing chamber along the slot, and a side plate is hinged to the evaporator to seal the opening end of the slot. The evaporator and the side plate are fixed together by a buckle.

[0026] An expansion hood is fixed to the bottom of the vent pipe, and a liquid storage tank connected to the drain pipe is fixedly installed on the evaporator. A drain valve connected to the bottom of the liquid storage tank is installed.

[0027] An insulation shell is fixedly installed on the evaporator, which is fitted over the outside of the gas duct. Insulation cotton is installed inside the insulation shell, which is fitted over the outside of the gas duct.

[0028] This invention provides an internal circulation evaporator for pharmaceutical dispensing systems. Compared with the prior art, it has the following advantages:

[0029] By utilizing the design of a cleaning mechanism, a sealing mechanism, and a drain outlet, the scale buildup on the bottom wall of the evaporation chamber can be cleaned through the cleaning mechanism. After eliminating the need for the sealing mechanism to block the drain outlet, the scale cleaned by the cleaning mechanism can be removed through the drain outlet, replacing the method of disassembling the heat exchanger to clean the scale. This method is simple to operate and reduces the workload of the staff. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown;

[0032] Figure 2 A front view of the invention is shown;

[0033] Figure 3 The present invention is shown Figure 2 A cross-sectional view along the AA direction;

[0034] Figure 4 A left view of the invention is shown;

[0035] Figure 5 The present invention is shown Figure 4 Cross-sectional view along the BB direction;

[0036] Figure 6 The present invention is shown Figure 5 Enlarged view of point A in the middle;

[0037] Figure 7 A schematic diagram of the installation structure of the sealing mechanism of the present invention is shown;

[0038] Figure 8 A schematic diagram of the mounting structure of the fixing plate of the present invention is shown;

[0039] Figure 9 A schematic diagram of the sealing plate of the present invention is shown;

[0040] Figure 10 A schematic diagram of the structure of the condenser plate of the present invention is shown;

[0041] Figure 11 A schematic diagram of the air blowing mechanism of the present invention is shown;

[0042] Figure 12 A schematic diagram of the installation structure of the one-way valve of the present invention is shown;

[0043] The diagram shows: 1. Evaporator; 11. Lower partition; 12. Upper partition; 121. Vent pipe; 122. Expansion hood; 13. Heating chamber; 14. Evaporation chamber; 15. Condensation chamber; 16. Electric heating plate; 17. Drain outlet; 18. Air inlet; 19. Slot; 191. Side plate; 2. Feeding pipe; 21. First valve body; 3. Condensation plate; 31. Air vent; 4. Air vent pipe; 41. Insulation shell; 42. Insulation cotton; 5. Drain pipe; 51. Liquid storage tank; 52. Drain valve; 6. Sealing mechanism; 61. Guide rod; 62. Sealing plate; 621. Through hole; 63. Electric push rod; 7. Cleaning mechanism; 71. Rotating rod; 711. Fixing plate; 712. Horizontal plate; 72. Scraper; 73. Through rod; 74. Abutting component; 741. Abutting shell; 742. Spring; 75. Driving component; 751. Rotating rod; 752. Bevel gear assembly; 753. Motor; 8. Air blowing mechanism; 81. Vent hood; 811. Air outlet; 8111. One-way valve; 812. Air inlet pipe; 813. Second valve body. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1

[0046] To address the technical problems in the background section, the following internal circulation evaporator for pharmaceutical solution preparation systems is provided:

[0047] Combination Figures 1-12As shown, the internal circulation evaporator for a pharmaceutical dispensing system provided by the present invention includes an evaporation chamber 1, which is hollow inside. The evaporation chamber 1 is divided into an independent heating chamber 13, an evaporation chamber 14, and a condensation chamber 15 by a lower partition 11 and an upper partition 12. The lower partition 11 is located below the upper partition 12. The heating chamber 13, evaporation chamber 14, and condensation chamber 15 are distributed sequentially from bottom to top. The lower partition 11 is made of a metal plate with good conductivity, such as a copper plate. An electric heating plate 16 is fixedly installed in the heating chamber 13 and contacts the lower partition 11. A feeding pipe 2 connected to the evaporation chamber 14 is fixedly installed on one side of the evaporation chamber 1. A first valve body 21 is installed on the feeding pipe 2. A condensing plate 3 for sealing the interior is installed in the condensation chamber 15. The condensing plate 3 has several guide holes. Vent 31; A vent pipe 4 is fixed on the outside of the evaporator 1, one end of the vent pipe 4 passes through the evaporator 1 and is located above the condenser plate 3, and the other end passes through the evaporator 1 and is located below the upper partition plate 12; A vent pipe 121 is fixedly installed on the upper partition plate 12, through which the evaporator chamber 14 and the condenser chamber 15 are connected; A drain pipe 5 connected to the condenser chamber 15 is fixed on the evaporator 1, and the bottom of the drain pipe 5 is flush with the top of the upper partition plate 12; A drain port 17 connected to the inside of the evaporator chamber 14 is opened on one side of the evaporator 1, and the bottom wall of the drain port 17 is flush with the top of the lower partition plate 11; A sealing mechanism 6 for sealing the drain port 17 is installed inside the evaporator 1; A cleaning mechanism 7 for cleaning the bottom wall of the evaporator chamber 14 is installed inside the evaporator 1.

[0048] By utilizing the design of the cleaning mechanism 7, the sealing mechanism 6, and the drain port 17, the scale on the bottom wall of the evaporation chamber 14 can be cleaned through the cleaning mechanism 7. After the sealing mechanism 6 is removed from the drain port 17, the scale cleaned by the cleaning mechanism 7 can be cleaned through the drain port 17, which replaces the method of disassembling the heat exchanger to clean the scale. The operation is simple and reduces the workload of the staff.

[0049] In this embodiment, the sealing mechanism 6 includes: two guide rods 61, both of which are vertical and movably pass through the upper partition 12; a sealing plate 62 is fixed to the bottom of the two guide rods 61 and fits against the top of the lower partition 11; when the sealing plate 62 fits against the lower partition 11, the sealing plate 62 seals the drain outlet 17; an electric push rod 63 for driving the guide rods 61 to slide is fixedly installed on the upper partition 12; the sealing plate 62 has several vertically oriented through holes 621; and the cleaning mechanism 7 is used to clean the upper surface of the sealing plate 62 and the inside of the through holes 621.

[0050] When sealing the sewage outlet 17, the guide rod 61 is slid vertically downward on the upper partition 12 by the electric push rod 63, which drives the sealing plate 62 to move downward, so that the sealing plate 62 fits against the lower partition 11, thus sealing the sewage outlet 17. Conversely, the guide rod 61 is slid vertically upward on the upper partition 12 by the electric push rod 63, thus canceling the sealing of the sewage outlet 17. The operation is simple.

[0051] The sealing plate 62 is designed such that when scale forms during the evaporation of the medicine, the scale is located on the upper surface of the sealing plate 62 and inside the through hole 621.

[0052] In this embodiment, the plurality of through holes 621 are divided into multiple groups of perforation units. Each perforation unit includes multiple through holes 621. The multiple groups of perforation units are arranged in a circular array. The multiple through holes 621 in the same group of perforation units are arranged in a linear array. The cleaning mechanism 7 includes: a rotating rod 71, which is vertically mounted on the upper partition plate 12. A scraper 72 is fixed to the bottom of the rotating rod 71. Multiple through rods 73 are vertically movably inserted through the scraper 72. Specifically, the through rods 73 are located below the scraper 72 and have an arc-shaped bottom. The multiple through rods 73 are arranged in a horizontal linear array. An abutment member 74 is installed on the scraper 72 to act on the through rods 73, which is used to move the through rods 73 downward along the scraper 72. The through rods 73 can pass through the through holes 621. The distance between two adjacent through rods 73 is equal to the distance between two adjacent through holes 621. A driving member 75 is installed on the evaporator 1 to drive the rotating rod 71 to rotate.

[0053] When cleaning scale, the electric push rod 63 causes the guide rod 61 to slide vertically upward on the upper partition 12, thus removing the blockage of the drain outlet 17 and making the sealing plate 62 fit against the bottom of the scraper 72. At this time, part of the through rod 73 passes through the through hole 621, and the other part of the through rod 73 slides into the contact shell 741 on the scraper 72. The spring 742 deforms, and the drive component 75 causes the rotating rod 71 to rotate. The scraper 72 scrapes the scale on the top of the sealing plate 62. When the through rod 73 moves to the through hole 621, the spring 742 returns to its natural state, and the scale in the through hole 621 can be cleaned.

[0054] Example 2

[0055] like Figures 1-12 As shown, based on the above embodiments, this embodiment further provides the following:

[0056] In this embodiment, the abutting member 74 includes a plurality of abutting shells 741, each fixedly mounted on the top of the scraper 72. A plurality of through rods 73 correspond one-to-one with the plurality of abutting shells 741, and the plurality of through rods 73 respectively movably pass through the bottom of the abutting shell 741. A spring 742 is installed inside the abutting shell 741 and on the opposite side of the abutting shell 741 and the through rods 73.

[0057] In use, the guide rod 61 is made to slide vertically upward on the upper partition plate 12 by the electric push rod 63. When the through rod 73 comes into contact with the sealing plate 62, the through rod 73 slides into the contact shell 741 on the scraper plate 72 under the force of the sealing plate 62. The spring 742 deforms. When the through rod 73 is displaced to the through hole 621, the spring 742 returns to its natural state, so that the through rod 73 slides out of the contact shell 741 and moves downward along the scraper plate 72.

[0058] In this embodiment, the driving component 75 includes a rotating rod 751 that is horizontally oriented and rotatably mounted on the evaporator 1. One end of the rotating rod 751 extends into the condensation chamber 15 and is connected to the rotating rod 751 through a bevel gear assembly 752. A motor 753 for driving the rotating rod 751 to rotate is fixedly installed on the outside of the evaporator 1.

[0059] When in use, the control motor 753 is turned on, the output shaft of the motor 753 rotates, driving the rotating rod 751 to rotate, which in turn drives the rotating rod 71 to rotate through the bevel gear assembly 752.

[0060] In this embodiment, a fixing plate 711 that fits against the top of multiple abutment shells 741 is fixedly installed on the rotating rod 71, and multiple horizontal plates 712 are fixed in a linear array on the rotating rod 71 and above the fixing plate 711.

[0061] The design of the fixing plate 711 is used to attach the fixing plate 711 to the top of the multiple contact shells 741, which improves the fixing effect of the multiple contact shells 741. Through the design of multiple horizontal plates 712, during the evaporation of the medicine liquid, the motor 753 can rotate the rotating rod 71, which drives the multiple horizontal plates 712 to rotate around the rotating rod 71, stirring the medicine liquid and making the medicine liquid heat more evenly, which is beneficial to the evaporation effect of the medicine liquid.

[0062] Example 3

[0063] like Figures 1-12 As shown, based on the above embodiments, this embodiment further provides the following:

[0064] In this embodiment, the top of the upper partition 12 is inclined downward along the drain port 17 to facilitate the discharge of scale. An air blowing mechanism 8 is installed on the evaporator 1 on the side away from the drain port 17, which is used to blow the scale on the top of the upper partition 12 toward the drain port 17.

[0065] The design of the air blowing mechanism 8 facilitates the blowing of scale that falls to the top of the upper partition 12 after cleaning towards the drain port 17.

[0066] In this embodiment, the air blowing mechanism 8 includes: a vent 81, an air inlet 18 on the side of the evaporator 1 away from the drain outlet 17, the vent 81 being fixed inside the air inlet 18 and sealing the air inlet 18, the vent 81 having multiple air outlets 811 that are all connected to the evaporator chamber 14, and an air inlet pipe 812 connected to the inside of the vent 81 being fixedly installed on the vent 81. Specifically, an air pump is externally connected to the air inlet pipe 812, and a second valve body 813 is installed on the air inlet pipe 812.

[0067] When in use, open the second valve body 813 to control the air pump to deliver gas into the air inlet pipe 812. The gas enters the vent 81 and pushes multiple one-way valves 8111 to open and discharge through the air outlet 811, blowing into the evaporation chamber 14.

[0068] In this embodiment, when the sealing plate 62 is in contact with the lower partition plate 11, multiple air outlets 811 extend above the sealing plate 62; a one-way valve 8111 is fixedly installed inside the air outlet 811; the air outlet 811 is divided into straight holes and oblique holes, and oblique holes are arranged at intervals between two adjacent straight holes. In this embodiment, the air inlet pipe 812 is connected to an external heat pump.

[0069] The design utilizes the vent holes 811, which are divided into straight holes and oblique holes, with oblique holes spaced between adjacent straight holes. When gas is discharged through the vent holes 811 and blown into the evaporation chamber 14, it is blown into the evaporation chamber 14 more comprehensively, making the cleaning of scale more thorough. Furthermore, when the sealing plate 62 is attached to the lower partition plate 11, multiple vent holes 811 extend above the sealing plate 62. During the evaporation of the medicine, the air pump and the second valve body 813 can be opened, and gas can be delivered into the evaporation chamber 14 through multiple vent holes 811, accelerating the flow of steam and improving the evaporation and concentration efficiency.

[0070] In this embodiment, the evaporator 1 is equipped with a slot 19 that communicates with the interior of the condensing chamber 15. The condensing plate 3 is inserted into the condensing chamber 15 along the slot 19. The evaporator 1 is hinged with a side plate 191 for sealing the opening end of the slot 19. The evaporator 1 and the side plate 191 are fixed together by a buckle. An expansion cover 122 is fixed to the bottom of the vent pipe 121. A liquid storage tank 51 connected to the drain pipe 5 is fixedly installed on the evaporator 1. A drain valve 52 connected to the bottom of the liquid storage tank 51 is installed. An insulation shell 41 is fixedly installed on the evaporator 1 and is fitted over the outside of the gas guide pipe 4. Insulation cotton 42 is installed inside the insulation shell 41 and is fitted over the outside of the gas guide pipe 4.

[0071] The design of the heat insulation shell 41 and the heat insulation cotton 42 achieves the effect of heat preservation of steam and reduces heat loss. The solution obtained after condensation falls onto the upper partition 12 at the bottom of the condensation chamber 15 and is discharged into the storage tank 51 through the drain pipe 5 for collection. The design of the drain valve 52 facilitates the discharge of the collected liquid in the storage tank 51. The design of the slot 19 facilitates the installation and disassembly of the condenser plate 3 and the maintenance of the condenser plate 3. The design of the side plate 191 achieves the effect of sealing the opening end of the slot 19. The design of the buckle facilitates the fixing or unfixing between the evaporator 1 and the side plate 191. The design of the expansion hood 122 facilitates the entry of steam into the vent pipe 121.

[0072] Working principle and usage process of this invention:

[0073] When the medicine evaporates:

[0074] The electric actuator 63 causes the guide rod 61 to slide vertically downward on the upper partition 12, which in turn causes the sealing plate 62 to move downward and block the drain outlet 17. Then, the first valve body 21 is opened, allowing the liquid medicine to enter the evaporation chamber 14 through the feeding pipe 2. The liquid medicine enters the evaporation chamber 14 through the through hole 621 and contacts the lower partition 11. The electric heating plate 16 is then turned on, and the liquid medicine in the evaporation chamber 14 is heated by the lower partition 11. The temperature of the liquid medicine rises and generates steam. The steam enters the vent pipe 121 through the expansion hood 122 and then enters the condensation chamber 15, where it contacts the condensation plate 3. The steam in the condensation chamber 15 liquefies upon cooling. During the condensation process, the uncondensed steam passes through the air guide hole 31 and is transported to the evaporation chamber 14 through the air guide pipe 4. This part of the heat is reused to achieve a circulating evaporation effect.

[0075] During the process of steam being transported by the gas pipe 4, the design of the heat insulation shell 41 and the heat insulation cotton 42 achieves the heat preservation effect of the steam and reduces heat loss. The solution obtained after condensation falls onto the upper partition 12 at the bottom of the condensation chamber 15 and is discharged into the storage tank 51 through the drain pipe 5 for collection. The design of the drain valve 52 facilitates the discharge of the collected liquid in the storage tank 51.

[0076] During the evaporation of the medicine, when scale forms, it is located on the upper surface of the sealing plate 62 and inside the through hole 621. To clean the scale, the electric push rod 63 causes the guide rod 61 to slide vertically upwards on the upper partition plate 12, removing the blockage of the drain port 17 and causing the sealing plate 62 to adhere to the bottom of the scraper 72. At this time, part of the through rod 73 passes through the through hole 621, and the other part of the through rod 73 forms an abutment with the sealing plate 62. Under the force of the sealing plate 62, the through rod 73 slides into the contact shell 741 on the scraper 72, causing the spring 742 to deform and control the motor 753 to start. The output shaft of the motor 753 rotates, driving the rotating rod 751 to rotate, thus driving the rotating rod 71 to rotate through the bevel gear assembly 752; the scraper... 72 scrapes the scale on the top of the sealing plate 62. When the through rod 73 moves to the through hole 621, the spring 742 returns to its natural state, causing the through rod 73 to slide outwards from the contact shell 741, thus cleaning the scale inside the through hole 621. The scale scraped and cleaned by the scraper 72 on the top of the sealing plate 62 falls through the through hole 621 to the top of the lower partition 11. Then, the second valve body 813 is opened, and the air pump is controlled to deliver gas into the air inlet pipe 812. The gas enters the vent 81, pushes multiple one-way valves 8111 to open, and discharges through the air outlet 811. The gas is blown into the evaporation chamber 14 and located below the sealing plate 62, thus blowing the scale that has fallen to the top of the upper partition 12 after cleaning towards the drain port 17, thus cleaning the scale.

[0077] Furthermore, the design of the fixing plate 711, which fits snugly against the tops of multiple contact shells 741, improves the fixing effect of the multiple contact shells 741. The design of multiple horizontal plates 712 allows the rotating rod 71 to rotate via the motor 753 during the evaporation of the medicinal liquid, causing the multiple horizontal plates 712 to rotate around the rotating rod 71, thus agitating the medicinal liquid and making the heating more uniform, which is beneficial to the evaporation effect. The vent holes 811 are divided into straight holes and oblique holes, with adjacent straight holes spaced apart. The design with oblique holes allows gas to be discharged through the vent holes 811 and blown into the evaporation chamber 14, ensuring a more comprehensive and thorough cleaning of scale. Furthermore, when the sealing plate 62 is in contact with the lower partition plate 11, multiple vent holes 811 extend above the sealing plate 62. During the evaporation of the liquid medicine, the air pump and the second valve body 813 can be opened, allowing gas to be delivered into the evaporation chamber 14 through multiple vent holes 811, accelerating the flow of steam and improving the evaporation and concentration efficiency.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An internal circulation evaporator for a pharmaceutical solution preparation system, characterized in that: It includes an evaporator, which is hollow inside. The evaporator is divided into an independent heating chamber, an evaporation chamber, and a condensation chamber by a lower partition and an upper partition. The lower partition is located below the upper partition, and the heating chamber, evaporation chamber, and condensation chamber are distributed from bottom to top. An electric heating plate that contacts the lower partition is fixedly installed inside the heating chamber. A feeding pipe that communicates with the evaporation chamber is fixedly installed on one side of the evaporator. A first valve body is installed on the feeding pipe. A condensing plate for sealing the interior is installed inside the condensing chamber. Several air guide holes are opened on the condensing plate. An air guide pipe is fixed outside the evaporator. One end of the air guide pipe passes through the evaporator and is located above the condensing plate. The other end passes through the evaporator and is located below the upper partition. A vent pipe is fixedly installed on the upper partition plate to connect the evaporation chamber and the condensation chamber. A drain pipe connected to the condensation chamber is fixed on the evaporator box, and the bottom of the drain pipe is flush with the top of the upper partition plate. The evaporator has a drain port on one side that communicates with the inside of the evaporation chamber. The bottom wall of the drain port is flush with the top of the lower partition. The evaporator is equipped with a sealing mechanism for sealing the drain port and a cleaning mechanism for cleaning the bottom wall of the evaporation chamber. The air blowing mechanism includes a vent hood, an air inlet on the side of the evaporator away from the drain outlet, a vent hood fixed inside the air inlet and blocking the air inlet, a number of air outlets connected to the evaporator chamber on the vent hood, an air inlet pipe fixedly installed on the vent hood and connected to its interior, and a second valve body installed on the air inlet pipe. The guide rod is vertical and moves through the upper partition. The bottom of the two guide rods is fixed with a sealing plate that fits against the top of the lower partition. When the sealing plate fits against the lower partition, multiple air vents extend above the sealing plate. A one-way valve is fixedly installed in the air vent. The air vent is divided into straight holes and oblique holes, and oblique holes are arranged at intervals between two adjacent straight holes.

2. The internal circulation evaporator for the pharmaceutical solution preparation system according to claim 1, characterized in that: There are two guide rods. When the sealing plate is in contact with the lower partition, the sealing plate seals the sewage outlet. An electric push rod for driving the guide rod to slide is fixedly installed on the upper partition. The sealing plate has several vertically oriented through holes, and the cleaning mechanism is used to clean the upper surface of the sealing plate and the inside of the through holes.

3. The internal circulation evaporator for a pharmaceutical solution preparation system according to claim 2, characterized in that: The plurality of through holes are divided into multiple groups of perforation units, each perforation unit comprising multiple through holes. The multiple groups of perforation units are arranged in a circular array, and the multiple through holes within the same group of perforation units are arranged in a linear array. The cleaning mechanism includes: A rotating rod is vertically mounted on the upper partition plate. A scraper is fixed to the bottom of the rotating rod, and multiple through rods are vertically movably inserted through the scraper. The multiple through rods are arranged in a horizontal linear array. A contact element is installed on the scraper to act on the through rods, which is used to move the through rods downward along the scraper. The through rods can pass through through holes, and the distance between two adjacent through rods is equal to the distance between two adjacent through holes. A drive element is installed on the evaporator to drive the rotating rod to rotate.

4. The internal circulation evaporator for a pharmaceutical solution preparation system according to claim 3, characterized in that: The contact element includes multiple contact shells, each fixedly mounted on the top of the scraper. Multiple through rods correspond one-to-one with the multiple contact shells, and the multiple through rods movably pass through the bottom of the contact shells. A spring is installed inside the contact shell and on the opposite side of the contact shell and the through rod.

5. The internal circulation evaporator for a pharmaceutical solution preparation system according to claim 4, characterized in that: The driving component includes a horizontally rotatable rod mounted on the evaporator, one end of which extends into the condensation chamber and is connected to the rod via a bevel gear assembly. A motor for driving the rotating rod to rotate is fixedly mounted on the outside of the evaporator.

6. The internal circulation evaporator for a pharmaceutical solution preparation system according to claim 5, characterized in that: The rotating rod is fixedly installed with a fixing plate that fits against the top of multiple abutment shells, and multiple horizontal plates are fixed in a linear array on the rotating rod and above the fixing plate.

7. The internal circulation evaporator for a pharmaceutical solution preparation system according to claim 6, characterized in that: The top of the upper partition plate is inclined downward along the direction of the drain outlet. An air blowing mechanism is installed on the evaporator box on the side away from the drain outlet, which is used to blow the scale on the top of the upper partition plate towards the drain outlet.

8. The internal circulation evaporator for a pharmaceutical solution preparation system according to claim 7, characterized in that: The evaporator is equipped with a slot that communicates with the interior of the condensing chamber. The condensing plate is inserted into the condensing chamber along the slot. A side plate is hinged to the evaporator to seal the opening of the slot. The evaporator and the side plate are fixed together by a buckle. An expansion hood is fixed to the bottom of the vent pipe, and a liquid storage tank connected to the drain pipe is fixedly installed on the evaporator. A drain valve connected to the inside of the liquid storage tank is installed at the bottom of the liquid storage tank. An insulation shell is fixedly installed on the evaporator, which is fitted over the outside of the gas duct. Insulation cotton is installed inside the insulation shell, which is fitted over the outside of the gas duct.

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