Rotary evaporation device for chemical experiment

Abstract

The invention relates to a rotary evaporation device for chemical experiments, and belongs to the field of experimental equipment, the rotary evaporation device comprises a base, a rotating disc rotatably arranged at the top of the base, a first driving mechanism, a second driving mechanism and a sealing mechanism, a fixed table is fixedly arranged at the top of the base, a rotating table is rotatably arranged at the top of the fixed table, and a connecting ring is arranged on one side of the rotating table; a fixed pipe is fixedly arranged in the connecting ring in a penetrating manner, a rotating pipe is rotationally arranged at one end of the fixed pipe, a flask is inserted into one end of the rotating pipe, a condenser is connected to the other end of the fixed pipe, and an alcohol lamp for heating the flask is arranged at the top of the base; the rotating disc is rotationally arranged at the top of the base, a plurality of placing grooves are formed in the top of the rotating disc, the alcohol lamp rotates around the flask and rotates on the flask through the first driving mechanism, and the heating uniformity is improved; the second driving mechanism can drive the flask away from the alcohol lamp, so that the flask is conveniently and safely replaced; the sealing mechanism ensures the sealing performance of the exchanged collecting pipe, and liquid leakage is prevented.

Description

Technical Field

[0001] The invention belongs to the field of experimental equipment and relates to a rotary evaporation device for chemical experiments. Background Art

[0002] Rotary evaporator, also known as rotary evaporator, is an evaporation instrument widely used in laboratories. It consists of a motor, a distillation flask, a heating pot, a condenser and other parts. It is mainly used for continuous distillation of volatile solvents under reduced pressure conditions and is used in chemistry, chemical industry, biomedicine and other fields.

[0003] After searching, the present invention with announcement number CN118576986B discloses a controllable rotary evaporator, which has the following disadvantages: during use, the flask can only be raised and lowered and rotated, but when the flask is replaced, the distance between the flask and the water bath heater is relatively close, which is prone to burns; during the collection process, it is not convenient to collect liquids with different distillation times in segments, which affects the collection of experimental data. Summary of the invention

[0004] In view of this, the present invention provides a rotary evaporator for chemical experiments in order to solve the problems that the flask can only be raised and lowered and rotated during use, but the flask is close to the water bath heater when replacing the flask, which is easy to cause burns; and it is inconvenient to collect liquids with different distillation times during the collection process, which affects the collection of experimental data.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A rotary evaporation device for chemical experiments comprises a base, a rotating disk rotatably arranged on the top of the base, a first driving mechanism, a second driving mechanism and a sealing mechanism;

[0007] A fixed platform is fixed on the top of the base, a rotating platform is rotatably provided on the top of the fixed platform, a connecting ring is provided on one side of the rotating platform, a fixed tube is fixedly provided in the connecting ring, a rotating tube is rotatably provided on one end of the fixed tube, a flask is plugged into one end of the rotating tube, a condenser is connected to the other end of the fixed tube, and an alcohol lamp for heating the flask is provided on the top of the base;

[0008] A plurality of placement grooves are provided on the top of the rotating disk, and collecting pipes for collecting liquid are provided in the placement grooves, and one of the collecting pipes corresponds to the discharge port of the condenser;

[0009] The first driving mechanism is arranged on the base, and is used to drive the alcohol lamp to rotate and move around the flask, and to drive the flask to rotate, so as to improve the uniform heating effect of the liquid in the flask, and to control the multiple collecting tubes to replace and collect according to the distillation time;

[0010] The second driving mechanism is arranged on the rotating table and cooperates with the fixed table to drive the flask away from the alcohol lamp to avoid burns when replacing the flask;

[0011] The sealing mechanism is arranged on the rotating disk to ensure the sealing of the replaced collecting tube.

[0012] Furthermore, the first driving mechanism includes a fixed block fixed on the top of the base, a same reciprocating screw is rotatably provided through one side of the fixed platform and the fixed block, a first motor is fixedly provided on one side of the fixed block, an output end of the first motor is fixedly connected to one end of the reciprocating screw, a moving platform is slidably provided on the top of the base, the moving platform is threadedly sleeved on the reciprocating screw, an alcohol lamp is arranged on the top of the moving platform, and a wind shield is fixedly sleeved on the outer wall of the alcohol lamp.

[0013] Furthermore, a connecting shaft is rotatably provided on the top of the movable platform, a first gear is fixedly sleeved on the outer wall of the connecting shaft, a rack meshing with the first gear is fixedly provided on the top of the base, a rotating platform is fixedly provided on the top of the connecting shaft, and an alcohol lamp is fixedly provided on the top of the rotating platform and offset from the connecting shaft.

[0014] Furthermore, a vertical plate is fixedly provided on the top of the base, the reciprocating screw is rotatably connected to the vertical plate, a rotating shaft is rotatably provided on one side of the vertical plate, synchronous wheels are fixedly sleeved on the outer walls of the rotating shaft and the reciprocating screw, the outer walls of the two synchronous wheels are transmission-connected with the same synchronous belt, and the rotating shaft is connected to the rotating tube through a connecting piece.

[0015] Furthermore, the connecting member includes a connecting disk fixedly arranged at one end of the rotating shaft, a plurality of first shifting teeth are fixedly arranged on one side of the connecting disk, a fixing ring is fixedly sleeved on the outer wall of one end of the rotating tube, and a plurality of second shifting teeth used in conjunction with the first shifting teeth are fixedly arranged at one end of the fixing ring.

[0016] Furthermore, the second driving mechanism includes a second motor fixedly arranged on one side of the rotating table, the output of the second motor passes through one side of the rotating table and is fixedly connected to the connecting ring, so as to drive the fixed tube and the rotating tube to rotate, a guide ring is fixedly arranged on the outer wall of the rotating table, a limit rod is slidably passed through the top of the guide ring, the top of the limit rod is connected to the rotating tube through a sliding member, the bottom end of the limit rod is L-shaped, a vertical groove is provided on the outer wall of the fixed table, the bottom end of the limit rod is located in the vertical groove, and an arc groove connected to the vertical groove is provided on the outer wall of the fixed table, so as to drive the rotating table to rotate on the fixed table.

[0017] Furthermore, the sliding member includes a guide bar fixedly arranged on the outer wall of the rotating tube, a ball head is arranged inside the guide bar, and the ball head is fixedly arranged on the top end of the limiting rod.

[0018] Furthermore, an electromagnetic clutch is fixedly provided on the top of the base, the input end of the electromagnetic clutch is fixedly connected to one end of the reciprocating screw, the output end of the electromagnetic clutch is fixedly provided with a drive shaft, and the outer wall of one end of the drive shaft and the outer wall of the bottom end of the rotating disk are fixedly sleeved with a second gear that meshes with each other.

[0019] Furthermore, the sealing mechanism includes a second set of rods fixedly arranged on the top of the rotating disk, a second sliding rod slidingly arranged inside the second set of rods, a cover plate corresponding to the discharge port of the condenser fixedly arranged on the top of the second sliding rod, a second spring arranged inside the second set of rods, two ends of the second spring are respectively fixedly connected to the bottom wall of the second set of rods and the bottom of the second sliding rod, a sealing plate is sleeved on the outer wall of the second sliding rod, a first sliding rod is fixedly arranged on the bottom of the sealing plate, a first set of rods is slidingly sleeved on the outer wall of the bottom end of the first sliding rod, the first set of rods is fixedly arranged on the top of the rotating disk, a first spring is arranged inside the first set of rods, two ends of the first spring are respectively fixedly connected to the bottom of the first sliding rod and the bottom wall of the first set of rods, a sealing cover is inserted at the top of the collecting pipe, a hose is connected to the top of the sealing cover, and the top of the hose passes through and is fixed on the top of the sealing plate.

[0020] Furthermore, a positioning ball is provided at the bottom end of the condenser, and a groove matched with the positioning ball is provided at the top of the cover plate for positioning the cover plate.

[0021] The beneficial effects of the present invention are:

[0022] 1. The rotary evaporation device for chemical experiments disclosed in the present invention can conveniently drive the flask away from the alcohol lamp through the design of the second driving mechanism, thereby avoiding scalding accidents that may occur when replacing the flask and improving the safety of the experiment. At the same time, the cooperation of the guide ring, the limit rod and the vertical groove and other components enables the rotating table to rotate smoothly on the fixed table, further ensuring the stability and reliability of the experiment.

[0023] 2. The rotary evaporation device for chemical experiments disclosed in the present invention, through the design of the first driving mechanism, enables the alcohol lamp to rotate and move around the flask, and at the same time drives the flask to rotate, thereby improving the uniform heating effect of the liquid in the flask and ensuring the distillation efficiency and quality. In addition, the first driving mechanism can also control the replacement and collection of multiple collection tubes according to the distillation time, realizing automatic collection operation, reducing manual intervention, and improving experimental efficiency. The setting of the electromagnetic clutch makes it possible to flexibly switch the driving source according to the experimental needs, thereby realizing precise control of the rotating disk and the collecting tube. At the same time, the meshing transmission of the second gear ensures the smooth rotation of the rotating disk and the collecting tube, and improves the accuracy and stability of the experiment.

[0024] 3. The rotary evaporation device for chemical experiments disclosed in the present invention enables the alcohol lamp to slide smoothly on the base through the design of the moving platform, and realizes the self-rotation of the alcohol lamp during the sliding process through the cooperation of the connecting shaft, the first gear and the rack, thereby further improving the heating uniformity. The setting of the baffle effectively prevents the influence of external wind on the heating process, thereby ensuring the stability and accuracy of the experiment.

[0025] 4. The rotary evaporation device for chemical experiments disclosed in the present invention realizes the rotation and movement of the alcohol lamp around the flask and the rotation of the flask through the first driving mechanism, thereby improving the heating uniformity; the second driving mechanism can drive the flask away from the alcohol lamp to facilitate the safe replacement of the flask; the sealing mechanism ensures the sealing of the collection tube after replacement to prevent liquid leakage.

[0026] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of a rotary evaporation device for chemical experiments of the present invention;

[0029] Figure 2 A schematic diagram of the three-dimensional structure of a rotary evaporator for chemical experiments of the present invention from another perspective;

[0030] Figure 3 This is a schematic diagram of the installation structure of a moving table and a rotating table of a rotary evaporator for chemical experiments of the present invention;

[0031] Figure 4 This is a schematic diagram of the installation structure of the vertical plate and the rotating shaft of a rotary evaporator for chemical experiments of the present invention;

[0032] Figure 5 This is a schematic diagram of the installation structure of the first gear and the second gear of a rotary evaporator for chemical experiments of the present invention;

[0033] Figure 6 This is a schematic diagram of the installation structure of the lifting rod and guide bar of a rotary evaporator for chemical experiments of the present invention;

[0034] Figure 7 This is a schematic diagram of the installation structure of a collecting tube and a cover plate of a rotary evaporator for chemical experiments of the present invention;

[0035] Figure 8 for Figure 7 Schematic diagram of the cross-section structure;

[0036] Fig. 9 The present invention is a schematic diagram of the matching structure of a condenser and a top plate of a rotary evaporator for chemical experiments.

[0037] Figure numerals: 1, base; 2, fixed platform; 3, rotating platform; 4, connecting ring; 5, fixed tube; 6, rotating tube; 7, flask; 8, condenser; 9, collecting tube; 10, cover plate; 11, moving platform; 12, alcohol lamp; 13, shield; 14, fixed block; 15, first motor; 16, reciprocating screw; 17, rotating platform; 18, connecting shaft; 19, first gear; 20, rack; 21, vertical plate; 22, rotating shaft; 23, synchronous wheel; 24, synchronous belt; 25, connecting plate; 26, first gear; 27, fixed Fixed ring; 28, second shifting gear; 29, second motor; 30, guide ring; 31, limit rod; 32, arc groove; 33, vertical groove; 34, ball head; 35, guide strip; 36, sealing cover; 37, hose; 38, sealing plate; 39, placement groove; 40, rotating disk; 41, second gear; 42, first set of rods; 43, first sliding rod; 44, first spring; 45, second set of rods; 46, second spring; 47, second sliding rod; 48, electromagnetic clutch; 49, drive shaft; 50, groove; 51, positioning ball. DETAILED DESCRIPTION

[0038] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0039] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0040] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] like Figure 1-Figure 9 A rotary evaporation device for chemical experiments shown in the figure includes a base 1, and a fixed table 2 is fixedly provided on the top of the base 1. A rotating table 3 is rotatably provided on the top of the fixed table 2, and the rotating table 3 can rotate relative to the fixed table 2. A connecting ring 4 is provided on one side of the rotating table 3, and a fixed tube 5 is fixedly provided through the connecting ring 4. A rotating tube 6 is rotatably provided on one end of the fixed tube 5, and a flask 7 is inserted at one end of the rotating tube 6 for containing the liquid to be evaporated. A condenser 8 is connected to the other end of the fixed tube 5, and the condenser 8 is used to condense the evaporated steam. An alcohol lamp 12 for heating the flask 7 is provided on the top of the base 1, and the flask 7 is heated by the alcohol lamp 12 to evaporate the liquid inside.

[0042] In order to realize the rotation of the flask 7 and the alcohol lamp 12, and the replacement collection of the collecting tube 9, the device also includes the following mechanisms:

[0043] The rotating disk 40 is rotatably arranged on the top of the base 1. A plurality of placement grooves 39 are provided on the top of the rotating disk 40. Collection pipes 9 for collecting liquid are arranged in the placement grooves 39. One of the collection pipes 9 corresponds to the discharge port of the condenser 8 and is used to receive the condensed liquid.

[0044] The first driving mechanism is arranged on the base 1, and is used to drive the alcohol lamp 12 to rotate and move around the flask 7, and to drive the flask 7 to rotate. The first driving mechanism includes a fixed block 14 fixedly arranged on the top of the base 1, and the same reciprocating screw 16 is rotatably provided through the fixed platform 2 and one side of the fixed block 14. A first motor 15 is fixedly arranged on one side of the fixed block 14, and the output end of the first motor 15 is fixedly connected to one end of the reciprocating screw 16. A moving platform 11 is slidably provided on the top of the base 1, and the moving platform 11 is threadedly sleeved on the reciprocating screw 16. When the first motor 15 is started, it will drive the reciprocating screw 16 to rotate, thereby causing the moving platform 11 to slide on the base 1. The alcohol lamp 12 is arranged on the top of the moving platform 11 and moves with the moving platform 11. The outer wall of the alcohol lamp 12 is fixedly sleeved with a wind shield 13 for preventing wind from affecting the flame.

[0045] A connecting shaft 18 is rotatably provided on the top of the moving platform 11, and a first gear 19 is fixedly sleeved on the outer wall of the connecting shaft 18. A rack 20 meshing with the first gear 19 is fixedly provided on the top of the base 1. When the moving platform 11 slides, the first gear 19 will mesh with the rack 20, thereby driving the connecting shaft 18 to rotate. A rotating platform 17 is fixedly provided on the top of the connecting shaft 18, and the alcohol lamp 12 is fixedly provided on the top of the rotating platform 17 and is offset from the connecting shaft 18. Therefore, when the connecting shaft 18 rotates, the rotating platform 17 and the alcohol lamp 12 will be driven to rotate, thereby realizing the rotation and movement of the alcohol lamp 12 around the flask 7.

[0046] A vertical plate 21 is fixedly provided on the top of the base 1, and the reciprocating screw 16 is connected to the vertical plate 21 through rotation. A rotating shaft 22 is rotatably provided on one side of the vertical plate 21, and a synchronous wheel 23 is fixedly provided on the outer wall of the rotating shaft 22 and the reciprocating screw 16, and the outer wall of the two synchronous wheels 23 is connected to the same synchronous belt 24. Therefore, when the reciprocating screw 16 rotates, the rotating shaft 22 is driven to rotate through the synchronous belt 24. The rotating shaft 22 is connected to the rotating tube 6 through a connecting member, and the connecting member includes a connecting disk 25 fixedly provided at one end of the rotating shaft 22, and a plurality of first shifting teeth 26 are fixedly provided on one side of the connecting disk 25. A fixed ring 27 is fixedly provided on the outer wall of one end of the rotating tube 6, and a plurality of second shifting teeth 28 used in conjunction with the first shifting teeth 26 are fixedly provided on one end of the fixing ring 27. Therefore, when the rotating shaft 22 rotates, the connecting disk 25 and the first shifting teeth 26 are driven to rotate, and then the fixing ring 27 and the rotating tube 6 are driven to rotate through the second shifting teeth 28, so as to realize the rotation of the flask 7.

[0047] The second driving mechanism is arranged on the rotating table 3 and cooperates with the fixed table 2 to drive the flask 7 away from the alcohol lamp 12. The second driving mechanism includes a second motor 29 fixedly arranged on one side of the rotating table 3. The output of the second motor 29 runs through one side of the rotating table 3 and is fixedly connected to the connecting ring 4. When the second motor 29 is started, it will drive the connecting ring 4, the fixed tube 5 and the rotating tube 6 to rotate, thereby driving the flask 7 to rotate and away from the alcohol lamp 12. A guide ring 30 is fixedly arranged on the outer wall of the rotating table 3. A limit rod 31 is slidably arranged on the top of the guide ring 30. The top of the limit rod 31 is connected to the rotating tube 6 through a sliding member. The sliding member includes a guide bar 35 fixedly arranged on the outer wall of the rotating tube 6. A ball head 34 is arranged in the guide bar 35. The ball head 34 is fixedly arranged on the top of the limit rod 31. Therefore, when the rotating tube 6 rotates upward, the guide bar 35 and the ball head 34 will be driven to move upward, thereby driving the limit rod 31 to slide in the guide ring 30. The bottom end of the limiting rod 31 is L-shaped, and a vertical groove 33 is provided on the outer wall of the fixed platform 2, and the bottom end of the limiting rod 31 is located in the vertical groove 33. An arc groove 32 connected to the vertical groove 33 is provided on the outer wall of the fixed platform 2, and when the bottom end of the limiting rod 31 slides to the arc groove 32, the rotating platform 3 is driven to rotate on the fixed platform 2.

[0048] In order to achieve the sealing and replacement of the collecting pipe 9, the device also includes a sealing mechanism. The sealing mechanism includes a second set of rods 45 fixedly arranged on the top of the rotating disk 40, a second sliding rod 47 is slidably arranged in the second set of rods 45, and a cover plate 10 corresponding to the discharge port of the condenser 8 is fixedly arranged on the top of the second sliding rod 47. A second spring 46 is arranged in the second set of rods 45, and the two ends of the second spring 46 are respectively fixedly connected to the bottom wall of the second set of rods 45 and the bottom of the second sliding rod 47. Therefore, when the cover plate 10 is subjected to external force, the second sliding rod 47 will be driven to slide in the second set of rods 45 and compress the second spring 46. When the external force disappears, the second spring 46 will drive the second sliding rod 47 and the cover plate 10 to reset, so that the cover plate 10 is attached to the bottom end of the condenser 8. The outer wall of the second sliding rod 47 is sleeved with a sealing plate 38, and the bottom of the sealing plate 38 is fixedly provided with a first sliding rod 43, and the outer wall of the bottom end of the first sliding rod 43 is slidably sleeved with a first set of rods 42, and the first set of rods 42 is fixedly arranged on the top of the rotating disk 40. A first spring 44 is provided in the first sleeve rod 42, and the two ends of the first spring 44 are fixedly connected to the bottom of the first sliding rod 43 and the bottom wall of the first sleeve rod 42, respectively. Therefore, when the sealing plate 38 is subjected to external force, the first sliding rod 43 will be driven to slide in the first sleeve rod 42 and compress the first spring 44. When the external force disappears, the first spring 44 will drive the first sliding rod 43 and the sealing plate 38 to reset. The top of the collecting tube 9 is plugged with a sealing cover 36, and the top of the sealing cover 36 is connected to a hose 37, and the top of the hose 37 is fixedly arranged on the top of the sealing plate 38. At this time, the sealing plate 38 can be driven to rotate by the first sliding rod 43 and the first sleeve rod 42 during the rotation of the rotating disk 40. When the collecting tube 9 needs to be replaced, the sealing cover 36 can be opened, the hose 37 can be connected to the new collecting tube 9, and then the sealing cover 36 can be closed.

[0049] In order to realize the automatic replacement of the collecting tube 9, an electromagnetic clutch 48 is fixedly provided on the top of the base 1, the input end of the electromagnetic clutch 48 is fixedly connected to one end of the reciprocating screw 16, and the output end of the electromagnetic clutch 48 is fixedly provided with a driving shaft 49. The outer wall of one end of the driving shaft 49 and the outer wall of the bottom end of the rotating disk 40 are both fixedly sleeved with a meshing second gear 41. When the electromagnetic clutch 48 is turned on, the reciprocating screw 16 will drive the driving shaft 49 and the second gear 41 to rotate, thereby driving the rotating disk 40 to rotate, thereby realizing the automatic replacement of the collecting tube 9.

[0050] In order to ensure that the cover plate 10 is positioned on the discharge port of the condenser 8, a positioning ball 51 is provided at the bottom end of the condenser 8, and a groove 50 is provided on the top of the cover plate 10 to match the positioning ball 51. When the cover plate 10 is docked with the discharge port of the condenser 8, the positioning ball 51 will be stuck in the groove 50 to achieve the positioning of the cover plate 10.

[0051] When in use, the device is powered on, and then the reagent is added into the flask 7, and then the flask 7 is plugged into one end of the rotating tube 6, and then the collecting tubes 9 are placed in the corresponding placement grooves 39 in turn, and then the sealing cover 36 is covered on the corresponding collecting tube 9, and finally the alcohol lamp 12 is ignited, and the alcohol lamp 12 can heat the flask 7 to form steam from the liquid inside the flask;

[0052] The steam can enter the condenser 8 through the rotating tube 6 and the fixed tube 5 to be cooled, and the cooled liquid can flow into the corresponding collecting tube 9 through the second sliding rod 47 and the hose 37 to be collected;

[0053] At the same time, the first motor 15 is started to drive the reciprocating screw 16 to rotate. The rotation of the reciprocating screw 16 can drive the moving platform 11 to reciprocate left and right. During the movement of the moving platform 11, the connecting shaft 18 can be driven to move. During the movement of the connecting shaft 18, the first gear 19 can be matched to make it move and rotate at the same time. The movement and rotation of the connecting shaft 18 can drive the rotating platform 17 to move and rotate, thereby driving the alcohol lamp 12 to move and rotate, so that it can heat around the flask 7, so that the liquid in the flask 7 is heated evenly. During the rotation of the reciprocating screw 16, the rotating shaft 22 can also be driven to rotate through the synchronous wheel 23 and the synchronous belt 24. The rotation of the rotating shaft 22 can drive the connecting disk 25 to rotate. The rotation of the connecting disk 25 can drive the first gear 26 to rotate. During the rotation of the first gear 26, the corresponding second gear 28 can drive the fixing ring 27 to rotate. The rotation of the fixing ring 27 can drive the rotating tube 6 to rotate. The rotation of the rotating tube 6 can drive the flask 7 to rotate, further making the liquid in the flask 7 heated evenly.

[0054] When it is necessary to collect liquid according to the distillation time, the electromagnetic clutch 48 can be started according to the time. At this time, the reciprocating screw 16 can rotate to drive the driving shaft 49 through the electromagnetic clutch 48. The rotation of the driving shaft 49 can drive the rotating disk 40 to rotate through the meshing second gear 41. The rotation of the rotating disk 40 can drive the collection tube 9 to change position. At the same time, the sealing plate 38 is driven to rotate through the first set rod 42 and the first sliding rod 43, so that the sealing plate 38 moves together with the collection tube 9. During the replacement process, the cover plate 10 can seal the top of the sealing plate 38, which can ensure that the collection tube 9 is in a sealed state.

[0055] When the flask 7 needs to be replaced, the second motor 29 is started to drive the connecting ring 4 to rotate. The rotation of the connecting ring 4 can drive one end of the rotating tube 6 to rotate upward, and one end of the fixed tube 5 to rotate downward. At this time, the second gear 28 is disengaged from the first gear 26. At the same time, during the upward rotation of the rotating tube 6, the ball head 34 can be driven to move upward through the guide bar 35. During the upward movement of the ball head 34, the ball head 34 slides in the guide bar 35 and drives the limiting rod 31 to move upward, so that the bottom end of the limiting rod 31 slides in the vertical groove 33. When one end of the limiting rod 31 moves to the top of the vertical groove 33, continuing to move upward can Move into the arc groove 32, and drive the rotating table 3 to rotate on the fixed table 2 through the guide ring 30, which can drive the flask 7 away from the alcohol lamp 12. At the same time, the fixed tube 5 can drive the condenser 8 to move downward in an inclined manner during its downward rotation. During the movement of the condenser 8, it can move downward by contacting the cover plate 10 through the bottom groove 50. The downward movement of the cover plate 10 can drive the second sliding rod 47 to move downward. The second sliding rod 47 moves downward to compress the second spring 46, and drives the sealing plate 38 to move downward, so as to drive the first sliding rod 43 to move downward to compress the first spring 44, until the positioning ball 51 is separated from the groove 50.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A rotary evaporator for chemical experiments, characterized in that: The invention comprises a base (1), a fixed platform (2) is fixedly provided on the top of the base (1), a rotating platform (3) is rotatably provided on the top of the fixed platform (2), a connecting ring (4) is provided on one side of the rotating platform (3), a fixed tube (5) is fixedly provided through the connecting ring (4), a rotating tube (6) is rotatably provided on one end of the fixed tube (5), a flask (7) is inserted at one end of the rotating tube (6), a condenser (8) is connected to the other end of the fixed tube (5), and an alcohol lamp (12) for heating the flask (7) is provided on the top of the base (1); a rotating disk (40), the rotating disk (40) being rotatably disposed on the top of the base (1), the rotating disk (40) being provided with a plurality of placement grooves (39) on the top of the rotating disk (40), the placement grooves (39) being provided with collecting tubes (9) for collecting liquid, one of the collecting tubes (9) corresponding to a discharge port of the condenser (8); A first driving mechanism is disposed on the base (1) and is used to drive the alcohol lamp (12) to rotate and move around the flask (7), and to drive the flask (7) to rotate, thereby improving the uniform heating effect of the liquid in the flask (7), and controlling the multiple collecting tubes (9) to replace and collect according to the distillation time; A second driving mechanism is disposed on the rotating table (3) and is used in conjunction with the fixed table (2) to drive the flask (7) away from the alcohol lamp (12) to avoid burns when replacing the flask (7); The sealing mechanism is arranged on the rotating disk (40) to ensure sealing of the replaced collecting tube (9).

2. A rotary evaporator for chemical experiments as claimed in claim 1, characterized in that: The first driving mechanism comprises a fixed block (14) fixedly arranged on the top of the base (1); a same reciprocating screw (16) is rotatably provided through one side of the fixed platform (2) and the fixed block (14); a first motor (15) is fixedly arranged on one side of the fixed block (14); an output end of the first motor (15) is fixedly connected to one end of the reciprocating screw (16); a moving platform (11) is slidably arranged on the top of the base (1); the moving platform (11) is threadedly sleeved on the reciprocating screw (16); the alcohol lamp (12) is arranged on the top of the moving platform (11); and a windproof cover (13) is fixedly sleeved on the outer wall of the alcohol lamp (12).

3. A rotary evaporator for chemical experiments as claimed in claim 2, characterized in that: A connecting shaft (18) is rotatably provided on the top of the movable platform (11); a first gear (19) is fixedly sleeved on the outer wall of the connecting shaft (18); a rack (20) meshing with the first gear (19) is fixedly provided on the top of the base (1); a rotating platform (17) is fixedly provided on the top of the connecting shaft (18); and the alcohol lamp (12) is fixedly provided on the top of the rotating platform (17) and is offset from the connecting shaft (18).

4. A rotary evaporator for chemical experiments as claimed in claim 3, characterized in that: A vertical plate (21) is fixedly provided on the top of the base (1), the reciprocating screw (16) is rotatably connected to the vertical plate (21), a rotating shaft (22) is rotatably provided on one side of the vertical plate (21), the outer walls of the rotating shaft (22) and the reciprocating screw (16) are both fixedly sleeved with synchronous wheels (23), the outer walls of the two synchronous wheels (23) are transmission-connected with the same synchronous belt (24), and the rotating shaft (22) is connected to the rotating tube (6) via a connecting piece.

5. A rotary evaporator for chemical experiments as claimed in claim 4, characterized in that: The connecting member comprises a connecting disk (25) fixedly arranged at one end of the rotating shaft (22), a plurality of first shifting teeth (26) being fixedly arranged on one side of the connecting disk (25), a fixing ring (27) being fixedly sleeved on the outer wall of one end of the rotating tube (6), and a plurality of second shifting teeth (28) used in conjunction with the first shifting teeth (26) being fixedly arranged on one end of the fixing ring (27).

6. A rotary evaporator for chemical experiments as claimed in claim 1, characterized in that: The second driving mechanism comprises a second motor (29) fixedly arranged on one side of the rotating platform (3); the output of the second motor (29) passes through one side of the rotating platform (3) and is fixedly connected to the connecting ring (4) for driving the fixed tube (5) and the rotating tube (6) to rotate; a guide ring (30) is fixedly arranged on the outer wall of the rotating platform (3); a limit rod (31) is slidably arranged through the top of the guide ring (30); the top of the limit rod (31) is connected to the rotating tube (6) through a sliding member; the bottom end of the limit rod (31) is L-shaped; a vertical groove (33) is provided on the outer wall of the fixed platform (2); the bottom end of the limit rod (31) is located in the vertical groove (33); and an arc groove (32) connected to the vertical groove (33) is provided on the outer wall of the fixed platform (2) for driving the rotating platform (3) to rotate on the fixed platform (2).

7. A rotary evaporator for chemical experiments as claimed in claim 6, characterized in that: The sliding member comprises a guide bar (35) fixedly arranged on the outer wall of the rotating tube (6), a ball head (34) being arranged inside the guide bar (35), and the ball head (34) being fixedly arranged on the top end of the limiting rod (31).

8. A rotary evaporator for chemical experiments as claimed in claim 5, characterized in that: An electromagnetic clutch (48) is fixedly provided on the top of the base (1); an input end of the electromagnetic clutch (48) is fixedly connected to one end of the reciprocating screw (16); a drive shaft (49) is fixedly provided on the output end of the electromagnetic clutch (48); and a second gear (41) meshing with each other is fixedly sleeved on the outer wall of one end of the drive shaft (49) and the outer wall of the bottom end of the rotating disk (40).

9. A rotary evaporator for chemical experiments as claimed in claim 8, characterized in that: The sealing mechanism comprises a second sleeve rod (45) fixedly arranged on the top of the rotating disk (40), a second sliding rod (47) being slidably arranged inside the second sleeve rod (45), a cover plate (10) corresponding to the discharge port of the condenser (8) being fixedly arranged on the top of the second sliding rod (47), a second spring (46) being arranged inside the second sleeve rod (45), two ends of the second spring (46) being fixedly connected to the bottom wall of the second sleeve rod (45) and the bottom of the second sliding rod (47) respectively, a sealing plate (38) being sleeved on the outer wall of the second sliding rod (47), and a first spring (46) being fixedly arranged on the bottom of the sealing plate (38). A sliding rod (43), the outer wall of the bottom end of the first sliding rod (43) is slidably sleeved with a first sleeve rod (42), the first sleeve rod (42) is fixedly arranged on the top of the rotating disk (40), a first spring (44) is arranged inside the first sleeve rod (42), the two ends of the first spring (44) are respectively fixedly connected to the bottom of the first sliding rod (43) and the bottom wall of the first sleeve rod (42), the top end of the collecting pipe (9) is plugged with a sealing cover (36), the top of the sealing cover (36) is connected to a hose (37), and the top end of the hose (37) passes through and is fixedly arranged on the top of the sealing plate (38).

10. A rotary evaporator for chemical experiments as claimed in claim 9, characterized in that: A positioning ball (51) is provided at the bottom end of the condenser (8), and a groove (50) matching the positioning ball (51) is provided at the top of the cover plate (10) for positioning the cover plate (10).

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