Rotary evaporator

Abstract

The utility model discloses a rotary evaporator, which relates to the technical field of evaporators and comprises a bottom plate, an evaporator body is arranged on one side of the top end of the bottom plate, a heating water bath kettle is fixedly arranged on the other side of the top end of the bottom plate, a rotary bottle is arranged in the heating water bath kettle, and a kettle cover is arranged above the heating water bath kettle. An observation window is fixedly arranged at the top of the pot cover, a rotating rod is rotationally arranged in the middle of the observation window, and a scraping plate for scraping mist on the observation window is fixedly arranged at the bottom of the rotating rod; the utility model has the beneficial effects that the observation window specially arranged at the top of the pot cover is matched with the rotatable rotating rod and the scraping plate, so that water mist condensed on the observation window can be scraped in time, and an operator can clearly observe the volatilization state of a solution in the rotating bottle so as to quickly respond and avoid experiment deviation or potential safety hazards; the pot cover can be conveniently disassembled, and great convenience is provided for follow-up cleaning and maintaining work of the pot cover.

Description

Technical Field

[0001] This utility model relates to an evaporator, and more particularly to a rotary evaporator, belonging to the field of evaporator technology. Background Technology

[0002] A rotary evaporator, also known as a rotary distillation apparatus, is a commonly used laboratory instrument. It mainly consists of a condenser, a rotary evaporator unit, a heating water bath, a rotating flask, a collection flask, and a feed valve. Rotary evaporators are primarily used for distilling volatile solvents under reduced pressure, and are commonly used in fields such as biology, pharmaceuticals, chemicals, food, and new materials. Rotary evaporators are typically used in conjunction with a vacuum pump and a cryogenic cooling liquid circulation pump. The vacuum pump's main function is to create a vacuum, helping the rotary evaporator achieve negative pressure conditions. The cryogenic cooling liquid circulation pump's main function is to provide circulating cooling water to the condenser, thereby improving distillation efficiency.

[0003] The rotary evaporator disclosed in application number "202320223811.2" includes a workbench and a rotary evaporator body. The rotary evaporator body is fixedly installed on the upper end of the workbench. A distillation flask is mounted on the rotary evaporator body. A water bath and a hydraulic telescopic rod are fixedly connected to the upper end of the workbench. A connecting plate is rotatably connected to the output end of the hydraulic telescopic rod. A heat-insulating cover is fixedly connected to the lower end of the connecting plate. The heat-insulating cover is located at the upper end of the water bath and matches the water bath. The bottom of the distillation flask is located inside the water bath. An electric heating rod is fixedly connected to the top of the inside of the heat-insulating cover through a first mounting plate. An S-shaped heating tube is fixedly connected to the inner wall of the heat-insulating cover through a second mounting plate. In this utility model, the combination of the heat-insulating cover, the electric heating rod, and the S-shaped heating tube can not only reduce heat loss and make the heat more fully utilized, but also make the sample inside the distillation flask heat up and evaporate more quickly.

[0004] However, the above method still has the following drawbacks: By placing the heat insulation cover on the top of the heating water bath, heat loss is reduced, allowing the heat of the heating water bath to be fully utilized; however, in actual use, the closed structure makes it difficult for operators to monitor the evaporation of the solution inside the rotating flask in real time, which can easily interfere with the control of the experimental process, and may even lead to experimental deviations or safety hazards due to the inability to handle the solution inside the rotating flask in time; in addition, it is not convenient to disassemble and clean the heat insulation cover, which affects subsequent cleaning and maintenance.

[0005] In order to better address the above problems, promote the development of industry technology, and enhance core competitiveness, this application proposes a new composition structure (or a new implementation method) that is different from the existing technology. Utility Model Content

[0006] The purpose of this invention is to provide a rotary evaporator to solve the problems mentioned in the background art, such as the closed structure making it impossible for operators to monitor the evaporation of the solution in the rotating flask in real time, interfering with the control of the experimental process, and potentially causing experimental deviations or safety hazards; at the same time, the heat preservation cover is difficult to disassemble, affecting cleaning and maintenance.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rotary evaporator, including a base plate, an evaporator body on one side of the top of the base plate, a heating water bath fixedly mounted on the other side of the top of the base plate, a rotating bottle inside the heating water bath, a lid above the heating water bath, an observation window fixedly mounted on the top of the lid, a rotating rod rotatably mounted in the middle of the observation window, a scraper for scraping fog from the observation window fixedly mounted at the bottom of the rotating rod, a motor engaged with the top of the rotating rod by a locking block, a plug inserted into the locking block slidably mounted on the top of the rotating rod, a support assembly on the surface of the plug, a bracket on one side of the heating water bath, and a lifting assembly inside the bracket.

[0008] As a preferred embodiment of this utility model, the heating water bath has an inner pot that slides inside, and a waterproof strip is fixed between the lid and the inner pot, and the waterproof strip is made of rubber.

[0009] As a preferred embodiment of this utility model, a moving groove is provided on one side of the pot lid to cooperate with the movement of the rotating bottle, and a plurality of evenly spaced guide grooves are provided on the inner wall of the pot lid.

[0010] As a preferred embodiment of this utility model, two positioning plates are symmetrically fixed at the bottom of the pot lid, and two sockets are symmetrically fixed at the top of the heating water bath, with the positioning plates and sockets being connected to each other.

[0011] As a preferred embodiment of this utility model, the support assembly includes a mounting bracket, which is slidably disposed outside the rotating rod. One side of the mounting bracket is fixedly connected to the top of one side of the rotating rod. A mechanical seal is fixedly provided at the connection between the rotating rod and the observation window. The observation window is made of highly transparent plastic.

[0012] As a preferred embodiment of this utility model, a movable plate is fixedly provided in the middle of the insertion rod, the movable plate is slidably connected to the inner wall of the mounting frame, a support spring is sleeved on the surface of the insertion rod, one end of the support spring is fixedly connected to one side of the movable plate, the other end of the support spring is fixedly connected to the inner wall of the mounting frame, and a pull cap is fixedly provided at one end of the insertion rod.

[0013] As a preferred technical solution of this utility model, the lifting assembly includes a lead screw, which is rotatably disposed inside the bracket. A fixing plate is threadedly connected to the surface of the lead screw through a lead screw nut. One side of the bottom end of the fixing plate is fixedly connected to the top end of the motor. Two guide rods are symmetrically slidably disposed inside the fixing plate, and both ends of the guide rods are fixedly connected to the inner wall of the bracket.

[0014] As a preferred embodiment of this utility model, a forward and reverse motor is fixedly provided at the top of the bracket, the output shaft of the forward and reverse motor passes through the bracket and is fixedly connected to the top of the lead screw, and fixing frames are fixedly provided on both sides of the bottom end of the bracket, and the bottom end of the fixing frame is fixedly connected to the top end of the base plate.

[0015] Compared with related technologies, the rotary evaporator provided by this utility model has the following beneficial effects:

[0016] 1. Adding a lid to the top of the water bath can effectively reduce heat loss and significantly improve heat utilization efficiency. The specially designed observation window on the top of the lid, together with the rotating rod and scraper, can promptly remove the water mist condensed on the observation window, ensuring that the operator can clearly observe the evaporation state of the solution in the rotating flask, thereby making a rapid response and avoiding experimental deviations or safety hazards.

[0017] 2. The equipped support component provides a stable support for the insertion rod, ensuring that the insertion rod and the locking block are tightly inserted and maintaining a stable connection between them during the insertion process. In conjunction with the lifting component, it drives the lid to move in the vertical direction. At the same time, the support component also allows the insertion rod and the locking block to be easily separated, making it easy to disassemble the locking block and thus realize the convenient removal of the lid, which greatly facilitates the subsequent cleaning and maintenance of the lid. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is one of the cross-sectional structural diagrams of the pot lid of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the heating water bath of this utility model;

[0021] Figure 4 This is a schematic diagram of the exploded structure of the heating water bath of this utility model;

[0022] Figure 5 This is the second cross-sectional structural diagram of the pot lid of this utility model;

[0023] Figure 6 This utility model Figure 5 A magnified structural diagram at point A;

[0024] Figure 7 This is an exploded structural diagram of the rotating rod of this utility model;

[0025] Figure 8 This is an exploded structural diagram of the bracket of this utility model.

[0026] In the diagram: 1. Base plate; 2. Evaporator body; 3. Heating water bath; 4. Rotating bottle; 5. Lid; 6. Observation window; 7. Rotating rod; 8. Scraper; 9. Locking block; 10. Motor; 11. Insert rod; 12. Support assembly; 1201. Mounting bracket; 1202. Moving plate; 1203. Support spring; 1204. Pull cap; 13. Lifting assembly; 1301. Lead screw; 1302. Fixing plate; 1303. Guide rod; 1304. Forward and reverse motor; 14. Inner pot; 15. Waterproof strip; 16. Positioning insert plate; 17. Socket; 18. Fixing bracket; 19. Moving groove; 20. Flow guide groove; 21. Bracket. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-8This utility model provides a rotary evaporator, including a base plate 1, an evaporator body 2 on one side of the top of the base plate 1, and a lifting mechanism for adjusting the height of a rotating flask 4 and a condenser tube. The condenser tube is connected to a vacuum pump and a low-temperature coolant circulation pump via a connector. The lifting mechanism allows for adaptive adjustment of the height of the rotating flask 4 as needed. A heating water bath 3 is fixedly mounted on the other side of the top of the base plate 1. The rotating flask 4 is located inside the heating water bath 3 and is connected to the rotary evaporator main unit on the evaporator body 2, facilitating rotation and adjustment of the flask 4 to achieve rotary heating and evaporation. A lid 5 is mounted above the heating water bath 3, and an observation window 6 is fixedly mounted on the top of the lid 5. The lid 5 reduces heat loss and improves heat utilization. The observation window 6 on the top of the lid 5, combined with a rotating rod 7 and a scraper 8, allows for precise control of the evaporator's rotation. A sponge pad is embedded on the inner side of the scraper 8. The sponge pad can scrape away the water mist generated at the observation window 6, which is convenient for observing the evaporation of the solution in the rotating flask 4 in conjunction with the observation window 6. The solution in the rotating flask 4 can be dealt with in time to avoid experimental deviations or safety hazards. A rotating rod 7 is rotated in the middle of the observation window 6. The bottom of the rotating rod 7 is fixed with a scraper 8 for scraping the mist in the observation window 6. A rubber sheet is attached to the top of the scraper 8 to improve the defogging effect inside the observation window 6. The top of the rotating rod 7 is engaged with a motor 10 by a locking block 9. The top of the rotating rod 7 is slidably connected to a plug rod 11 that is inserted into the locking block 9. The surface of the plug rod 11 is provided with a support component 12. A bracket 21 is provided on one side of the heating water bath 3. The bracket 21 has a lifting component 13 inside. The lifting component 13 can drive the locking block 9 to move in the vertical direction. In conjunction with the locking block 9, the rotating rod 7 and the lid 5 can be moved in the vertical direction, making it more convenient to use.

[0029] The support assembly 12 includes a mounting bracket 1201, which is slidably disposed outside the rotating rod 7. One side of the mounting bracket 1201 is fixedly connected to the top of one side of the rotating rod 7. A mechanical seal is fixedly provided at the connection between the rotating rod 7 and the observation window 6. The observation window 6 is made of highly transparent plastic. A movable plate 1202 is fixedly provided in the middle of the insertion rod 11. The movable plate 1202 is slidably connected to the inner wall of the mounting bracket 1201. A support spring 1203 is sleeved on the surface of the insertion rod 11. One end of the support spring 1203 is fixedly connected to one side of the movable plate 1202, and the other end of the support spring 1203 is fixedly connected to the inner wall of the mounting bracket 1201. A pull cap 1204 is fixedly provided at one end of the insertion rod 11. 12. This design facilitates the use of the support spring 1203 and the moving plate 1202 to support the insertion rod 11, ensuring a close connection between the insertion rod 11 and the locking block 9, and maintaining stability between the insertion rod 11 and the locking block 9 throughout the insertion process. Simultaneously, the pull cap 1204 allows the insertion rod 11 to move horizontally, separating it from the locking block 9 and facilitating the removal of the locking block 9. This makes the removal of the pot lid 5 easier, enabling subsequent cleaning and maintenance of the pot lid 5. The mechanical seal between the rotating rod 7 and the observation window 6 provides a sealing function, and the highly transparent plastic observation window 6 ensures good visibility, facilitating real-time observation of the internal conditions.

[0030] The lifting assembly 13 includes a lead screw 1301, which is rotatably mounted inside the bracket 21. A fixing plate 1302 is threadedly connected to the surface of the lead screw 1301 via a lead screw nut. One side of the bottom end of the fixing plate 1302 is fixedly connected to the top end of the motor 10. Two guide rods 1303 are symmetrically slidably arranged inside the fixing plate 1302, and both ends of the guide rods 1303 are fixedly connected to the inner wall of the bracket 21. A forward and reverse motor 1304 is fixedly mounted at the top end of the bracket 21. The output shaft of the forward and reverse motor 1304 passes through the bracket 21 and is connected to the lead screw 1301. The top of the bracket 21 is fixedly connected, and the bottom of the bracket 21 is fixedly provided with two fixed frames 18 on both sides. The bottom of the fixed frame 18 is fixedly connected to the top of the base plate 1. Through the set lifting component 13, the forward and reverse motor 1304 is precisely driven to drive the lead screw 1301 to rotate and adjust. With the lead screw nut and guide rod 1303, the fixed plate 1302 can be smoothly lifted and adjusted, thereby flexibly controlling the height position of the motor 10. In turn, it can work with the locking block 9 to drive the rotating rod 7 and the pot lid 5 to move in the vertical direction, making it more convenient to use.

[0031] Two positioning plates 16 are symmetrically fixed at the bottom of the pot lid 5, and two sockets 17 are symmetrically fixed at the top of the heating water bath 3. The positioning plates 16 and the sockets 17 are connected to each other. By setting two positioning plates 16 at the pot lid 5 and two sockets 17 at the heating water bath 3, the pot lid 5 can be limited to prevent it from rotating.

[0032] The heating water bath 3 has a sliding inner pot 14 inside, and a waterproof strip 15 made of rubber is fixed between the lid 5 and the inner pot 14. The inner pot 14 inside the heating water bath 3 adopts a sliding design, which facilitates flexible installation and disassembly, cleaning and maintenance, and makes operation more convenient and efficient. The rubber waterproof strip 15 between the lid 5 and the inner pot 14, with the good elasticity and sealing properties of rubber, can tightly fit the contact parts of the lid 5 and the inner pot 14, while reducing heat loss from gaps and further improving the heat preservation performance of the water bath.

[0033] The lid 5 has a moving groove 19 on one side that moves in conjunction with the rotating bottle 4, and the inner wall of the lid 5 has several evenly spaced guide grooves 20. The moving groove 19 on the lid 5 is compatible with the rotating bottle 4, so that the rotating bottle 4 can be adjusted without any restrictions. The evenly distributed guide grooves 20 on the inner wall can quickly gather and guide the liquid to slide down.

[0034] In use, first, according to the actual operating procedure of the rotary evaporator, connect and fix the connector at the condenser tube together with the vacuum pump and the low-temperature coolant circulation pump, ensuring that the airtightness of the connections at each bottle meets the experimental requirements. Then, add the solution to be tested into the rotary flask 4. Next, control the forward and reverse rotation motor 1304 to flexibly drive the lead screw 1301 to rotate forward. Combined with the lead screw nut and guide rod 1303, this drives the fixed plate 1302, motor 10, locking block 9, rotating rod 7, observation window 6, and lid 5 to move vertically, causing the lid 5 to move upwards. Then, add an appropriate amount of aqueous solution into the inner pot 14 as needed, and then repeat the above operating steps. The inner pot 14 is sealed and waterproofed by the lid 5 and the waterproof strip 15. Then, by controlling the temperature control settings built into the heating water bath 3, the water inside the inner pot 14 can be fully heated to evaporate the solution inside the rotating flask 4. The lid 5 is set up during evaporation to reduce heat loss and improve heat utilization. The motor 10 drives the locking block 9 and the rotating rod 7 to rotate, which drives the scraper 8 to scrape away the water mist generated on the inner wall of the observation window 6. This allows for timely observation of the evaporation state of the solution inside the rotating flask 4 and the evaporation state of the water inside the inner pot 14, so as to react quickly and avoid experimental deviations or safety hazards.

[0035] After evaporation is complete, turn off all electrical equipment and repeat the above steps. Move the lid 5 upward again to separate the positioning plate 16 from the socket 17. When the lid 5 needs to be maintained and cleaned, pull the cap 1204 to pull the rod 11 to move. At this time, the support spring 1203 is compressed, and the rod 11 separates from the plug-in block 9, thereby separating the rotating rod 7 from the block 9. This allows the lid 5 to be easily disassembled, greatly facilitating the subsequent cleaning and maintenance of the lid 5.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary evaporator, comprising a base plate (1), characterized in that, An evaporator body (2) is provided on one side of the top of the base plate (1), and a heating water bath (3) is fixedly provided on the other side of the top of the base plate (1). A rotating bottle (4) is provided inside the heating water bath (3). A lid (5) is provided above the heating water bath (3). An observation window (6) is fixedly provided on the top of the lid (5). A rotating rod (7) is provided in the middle of the observation window (6). A scraper (8) for scraping fog from the observation window (6) is fixedly provided at the bottom of the rotating rod (7). A motor (10) is engaged with the top of the rotating rod (7) by a locking block (9). A plug rod (11) is slidably provided on the top of the rotating rod (7) and inserted into the locking block (9). A support component (12) is provided on the surface of the plug rod (11). A bracket (21) is provided on one side of the heating water bath (3), and a lifting component (13) is provided inside the bracket (21).

2. The rotary evaporator according to claim 1, characterized in that: The heating water bath (3) has an inner pot (14) that slides inside. A waterproof strip (15) is fixed between the lid (5) and the inner pot (14), and the waterproof strip (15) is made of rubber.

3. The rotary evaporator according to claim 1, characterized in that: The lid (5) has a moving groove (19) on one side that moves in conjunction with the rotating bottle (4), and the inner wall of the lid (5) has several evenly spaced guide grooves (20).

4. The rotary evaporator according to claim 1, characterized in that: The bottom of the pot lid (5) is symmetrically fixed with two positioning plates (16), and the top of the heating water bath pot (3) is symmetrically fixed with two sockets (17). The positioning plates (16) and the sockets (17) are connected to each other.

5. The rotary evaporator according to claim 1, characterized in that: The support assembly (12) includes a mounting bracket (1201), which is slidably disposed outside the rotating rod (7). One side of the mounting bracket (1201) is fixedly connected to the top of one side of the rotating rod (7). A mechanical seal is fixedly provided at the connection between the rotating rod (7) and the observation window (6). The observation window (6) is made of highly transparent plastic.

6. The rotary evaporator according to claim 5, characterized in that: A movable plate (1202) is fixedly provided in the middle of the insertion rod (11). The movable plate (1202) is slidably connected to the inner wall of the mounting frame (1201). A support spring (1203) is sleeved on the surface of the insertion rod (11). One end of the support spring (1203) is fixedly connected to one side of the movable plate (1202), and the other end of the support spring (1203) is fixedly connected to the inner wall of the mounting frame (1201). A pull cap (1204) is fixedly provided at one end of the insertion rod (11).

7. The rotary evaporator according to claim 1, characterized in that: The lifting assembly (13) includes a lead screw (1301), which is rotatably disposed inside the bracket (21). A fixing plate (1302) is threadedly connected to the surface of the lead screw (1301) through a lead screw nut. One side of the bottom end of the fixing plate (1302) is fixedly connected to the top end of the motor (10). Two guide rods (1303) are symmetrically slidably disposed inside the fixing plate (1302). Both ends of the guide rods (1303) are fixedly connected to the inner wall of the bracket (21).

8. The rotary evaporator according to claim 7, characterized in that: The top of the bracket (21) is fixedly provided with a forward and reverse motor (1304). The output shaft of the forward and reverse motor (1304) passes through the bracket (21) and is fixedly connected to the top of the lead screw (1301). Fixing frames (18) are fixedly provided on both sides of the bottom end of the bracket (21). The bottom end of the fixing frame (18) is fixedly connected to the top end of the base plate (1).

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