CN211536579U

CN211536579U - Heating device of rotary evaporator

Info

Publication number: CN211536579U
Application number: CN201922306712.7U
Authority: CN
Inventors: 赵辉
Original assignee: Shanghai Ipro Dva Inspection Technology Co ltd
Current assignee: Shanghai Ipro Dva Inspection Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-09-22
Anticipated expiration: 2029-12-18

Abstract

The utility model relates to a heating device of rotary evaporator relates to rotary evaporator's technical field, including frame, support, be provided with the water bath on the support, be provided with water control device on the frame, water control device includes mounting bracket, slide bar, test bar, kicking block, inlet tube, control assembly, and the mounting bracket setting is on the frame, and the slide bar slides and sets up on the mounting bracket, and the test bar sets up on the slide bar, and the kicking block sets up on the test bar, and the inlet tube sets up on the mounting bracket, and control assembly sets up on the mounting bracket. The utility model controls the water inlet pipe to add water to the water bath pot by touching the control component by the sliding rod, when the water level in the water bath pot rises to a certain height, the control component controls the water inlet pipe to be closed, thereby automatically controlling the water quantity in the water bath pot and ensuring the water level in the water bath pot, thereby improving the heating efficiency of the water bath pot to the rotary bottle; meanwhile, the probability of dry burning of the water bath is reduced, and the service life of the water bath is prolonged.

Description

Heating device of rotary evaporator

Technical Field

The utility model belongs to the technical field of the technique of rotary evaporator and specifically relates to a heating device of rotary evaporator is related to.

Background

A rotary evaporator, also called a rotary evaporator, is common laboratory equipment, consists of a motor, a distillation flask, a heating pot, a condenser pipe and the like, is mainly used for continuously distilling volatile solvents under a reduced pressure condition, and is applied to the fields of chemistry, chemical engineering, biological medicine and the like. The working principle is that the flask is rotated at a constant speed under the most suitable speed through electronic control so as to increase the evaporation area. The evaporation flask was brought to a negative pressure by a vacuum pump. The evaporation flask is rotated and placed in a water bath kettle for constant temperature heating, and the solution in the flask is heated, diffused and evaporated in the rotating flask under negative pressure.

Among the prior art, can refer to the chinese utility model patent that the grant bulletin number is CN206404337U, it discloses a prevent rotatory evaporimeter of liquid boiling, including the bracing piece, be equipped with rotary device on the bracing piece, rotary device is connected with rotatory bottle, and the bottleneck of rotatory bottle links to each other with the condenser, and the condenser is fixed on the bracing piece, the lower extreme of condenser even has the receiving flask, the condenser passes through the buffer flask and links to each other with vacuum pump, still rotatory evaporimeter includes the water bath, and the water bath is located the below of rotatory bottle.

The technical scheme has the following defects: the water in the water bath kettle is evaporated for a long time under the heating state, the liquid level drops to the bottom of the rotary bottle and can not effectively heat the rotary bottle, so the heating efficiency of the water bath kettle on the rotary bottle is lower, the water level in the water bath kettle continuously drops, and if water is not supplemented timely, the dry-boiling condition is easy to occur, thereby causing potential safety hazards to equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heating device of a rotary evaporator, which improves the heating efficiency of a water bath kettle to a rotary bottle; meanwhile, the probability of dry burning of the water bath is reduced, and the service life of the water bath is prolonged.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a heating device of rotatory evaporimeter, includes the frame, sets up the support on the frame, be provided with rotary device on the support, rotary device is last to be provided with rotatory bottle, is located be provided with the water bath on the support of rotatory bottle below, the body of rotatory bottle is placed in the water bath, be provided with the accuse water installation of the water yield in the control water bath on the frame, accuse water installation includes mounting bracket, slide bar, detection bar, kicking block, inlet tube, control assembly, the mounting bracket sets up on the frame, the vertical setting of sliding bar slides on the mounting bracket, the detection bar sets up on the slide bar and extends in the water bath, the kicking block sets up on the lower lateral wall of detection bar, the inlet tube sets up on the mounting bracket and is connected and extends in the water bath with the water source, control assembly sets up on the mounting bracket, just the kicking block drives the vertical removal of slide bar and touches control assembly and controls opening or closed control water bath of inlet tube to come The amount of water in the pan.

By adopting the technical scheme, the rotating device drives the rotating bottle to rotate, and the water bath kettle heats the rotating bottle, after a period of heating time, the water amount in the water bath kettle is reduced, the water level in the water bath kettle is lowered, the water level is lowered to drive the floating block to move downwards, the floating block moves downwards to drive the detection rod and the sliding rod to move downwards, the sliding rod moves downwards to touch the control component to control the water inlet pipe to add water into the water bath kettle, when the water level in the water bath kettle is raised to a certain height, the control component controls the water inlet pipe to be closed, so that the water amount in the water bath kettle is automatically controlled, the water level in the water bath kettle is ensured, and the heating efficiency of the water bath kettle on the rotating bottle; meanwhile, the probability of dry burning of the water bath is reduced, and the service life of the water bath is prolonged.

Preferably, the control assembly comprises a first sensor, a second sensor and an electromagnetic valve, the first sensor and the second sensor are arranged on the mounting frame at intervals up and down, and the electromagnetic valve is arranged on the water inlet pipe and is electrically connected with the first sensor and the second sensor; when the sliding rod moves downwards to touch the second sensor, the second sensor controls the electromagnetic valve to open the water inlet pipe to add water to the water bath, and when the sliding rod moves upwards to touch the first sensor, the first sensor controls the electromagnetic valve to close the water inlet pipe.

Through adopting above-mentioned technical scheme, when the slide bar moves down and touches the second inductor, the water inlet pipe is opened to second inductor control solenoid valve and water is added to the water bath, then when the water level rose and drive the slide bar and touch first inductor, the water inlet pipe was closed to first inductor control solenoid valve to this comes to add water to the water bath automatically according to the water level in the water bath.

Preferably, the two opposite side walls of the sliding rod are provided with vertical sliding grooves, and the mounting rack is rotatably provided with rollers rolling on the two sliding grooves.

Through adopting above-mentioned technical scheme, roll on the groove that slides through the gyro wheel, reduced the frictional force to the slide bar when the slide bar is vertical to slide to sensitivity when having improved the kicking block and having driven the slide bar and slide has improved the accuracy of slide bar when touching first inductor and second inductor and come the control water yield.

Preferably, the mounting frame is provided with an adjusting device for vertically adjusting the positions of the first inductor and the second inductor.

Through adopting above-mentioned technical scheme, adjust the position of first inductor and second inductor through adjusting device to come the water yield in the control water bath, so as to adapt to the heating to different positions rotation bottle.

Preferably, adjusting device includes regulating plate, mounting panel, sliding block, adjusting screw, the vertical setting of regulating plate is on the mounting bracket, the vertical waist shape hole of seting up two parallels of regulating plate, the vertical interval of mounting panel is on the regulating plate, first inductor and second inductor set up respectively on two upper and lower regulating plates, the sliding block sets up on the mounting panel and vertical setting of sliding on waist shape hole, adjusting screw threaded connection just supports tightly on the regulating plate on the sliding block.

Through adopting above-mentioned technical scheme, loosen adjusting screw, then grab adjusting screw and remove the mounting panel to this position of removing first inductor and second inductor, remove the completion back, screw up adjusting screw and fix the position of first inductor and second inductor.

Preferably, the adjusting screw is a thumb screw.

By adopting the technical scheme, the adjusting screw can be screwed without a tool when the adjusting screw is screwed by arranging the butterfly screw, so that the aim of conveniently screwing the adjusting screw is fulfilled.

Preferably, the top end of the water bath is provided with two protective covers which surround and block the opening of the water bath, the protective covers are provided with openings through which the rotating bottles can pass, and the protective covers are provided with through holes through which the detection rods and the water inlet pipes can pass.

Through adopting above-mentioned technical scheme, through the setting of protection casing, the quantity of water bath evaporation when having reduced the water bath heating to reduce the loss of the water yield in the water bath, also reduced the thermal loss in the water bath simultaneously.

Preferably, the two side walls, close to each other, of the protective covers are provided with insertion rods and insertion grooves matched with the insertion rods in an insertion manner at intervals, and the lower side walls of the protective covers are provided with annular clamping rings which are clamped and installed on the water bath kettle.

By adopting the technical scheme, the plug-in rod on one protective cover is plugged into the plug-in groove on the other protective cover, then the two protective covers are fixedly installed together, and then the clamping ring is clamped on the water bath kettle, so that the two protective covers are installed on the water bath kettle; when the protective cover needs to be detached, the protective cover is grabbed to move upwards, the clamping ring is detached from the water bath, the protective cover is pulled to separate the insertion rod from the insertion groove, and therefore the two protective covers are detached.

Preferably, one end of the insertion rod, which is far away from the protective cover, is provided with a chamfer.

Through adopting above-mentioned technical scheme, through the setting of chamfer, lead when the inserting rod is pegged graft on the inserting groove to peg graft the inserting groove with the inserting rod on.

To sum up, the utility model discloses a beneficial technological effect does:

1. the water level is lowered to drive the sliding rod to move downwards to touch the control component to control the water inlet pipe to be opened so as to add water into the water bath kettle, when the water level in the water bath kettle rises to a certain height, the control component controls the water inlet pipe to be closed so as to automatically control the water amount in the water bath kettle, the water level in the water bath kettle is ensured, and therefore the heating efficiency of the water bath kettle on the rotary bottle is improved; meanwhile, the probability of dry burning of the water bath is reduced, and the service life of the water bath is prolonged;

2. the roller rolls on the sliding groove, so that the friction force to the sliding rod when the sliding rod slides vertically is reduced, the sensitivity of the sliding rod driven by the floating block to slide is improved, and the accuracy of the sliding rod when the sliding rod touches the first sensor and the second sensor to control the water quantity is improved;

3. the mounting plate is moved by loosening the adjusting screw, so that the positions of the first sensor and the second sensor are moved, and after the movement is finished, the adjusting screw is screwed down to fix the positions of the first sensor and the second sensor, so that the water quantity in the water bath pot is controlled, and the heating of rotary bottles at different positions is adapted;

4. through the arrangement of the protective cover, the evaporation quantity of the water bath kettle is reduced when the water bath kettle is heated, so that the water loss in the water bath kettle is reduced, and meanwhile, the heat loss in the water bath kettle is also reduced.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the partial structure of the present invention, mainly showing the water control device, wherein the side wall of the water bath is sectioned;

FIG. 3 is an exploded view of the adjustment device;

fig. 4 is an exploded view of the shield.

Reference numerals: 1. a machine base; 11. a support; 12. supporting a tube; 13. rotating the bottle; 14. a water bath kettle; 15. a roller; 16. a fixed block; 17. a support plate; 2. a rotating device; 21. a rotating electric machine; 22. rotating the tube; 3. a water control device; 31. a mounting frame; 32. a slide bar; 321. an induction block; 322. a sliding groove; 33. a detection lever; 34. floating blocks; 35. a water inlet pipe; 36. a control component; 361. a first inductor; 362. a second inductor; 363. an electromagnetic valve; 4. an adjustment device; 41. an adjusting plate; 411. a waist-shaped hole; 42. mounting a plate; 43. a sliding block; 44. an adjusting screw; 5. a protective cover; 51. an opening; 52. a through hole; 53. a plug rod; 531. chamfering; 54. inserting grooves; 55. a snap ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, a heating device of a rotary evaporator of the utility model comprises a frame 1 and a bracket 11 fixedly installed on the frame 1, wherein a rotating device 2 is arranged on the bracket 11, the rotating device 2 comprises a rotating motor 21 and a rotating pipe 22, and a supporting pipe 12 is fixedly installed on the vertical side wall of the bracket 11; rotating electrical machines 21 fixed mounting is on support 11, and swivel pipe 22 rotates and installs on stay tube 12 and be connected with rotating electrical machines 21, and swivel pipe 22 is kept away from one of stay tube 12 and is served and install rotatory bottle 13, is located and installs water bath 14 on the frame 1 of rotatory bottle 13 below, and the body of rotatory bottle 13 is located water bath 14. The solution is filled into the rotary bottle 13, then the rotary bottle 13 is installed on the rotary pipe 22, the rotary motor 21 is started to drive the rotary pipe 22 to rotate, the rotary pipe 22 rotates to drive the rotary bottle 13 to rotate, and meanwhile the water bath pot 14 heats the rotary bottle 13, so that the solution in the rotary bottle 13 is heated.

Referring to fig. 1 and 2, a water control device 3 for controlling the amount of water in the water bath 14 is arranged on the machine base 1, the water control device 3 comprises an installation frame 31, a sliding rod 32, a detection rod 33, a floating block 34, a water inlet pipe 35 and a control assembly 36, the installation frame 31 is fixedly installed on the upper surface of the machine base 1 on one side of the water bath 14 far away from the support pipe 12, a fixed block 16 is fixedly installed on the side wall of the installation frame 31 on one side close to the water bath 14, the sliding rod 32 is in an inverted L shape, and the vertical end of the sliding rod 32 is vertically slidably arranged on the fixed block 16; the detection rod 33 is fixedly arranged on the lower side wall of one horizontal end of the sliding rod 32, and the lower end of the detection rod 33 extends into the water bath 14; the floating block 34 is fixedly arranged on the lower side wall of the detection rod 33, and the floating block 34 floats on the water surface in the water bath 14; be located fixed mounting on the mounting bracket 31 of sliding block 43 top and have backup pad 17, inlet tube 35 fixed mounting is on the vertical lateral wall of backup pad 17, and the inlet tube 35 is close to the one end of water bath 14 and extends in the water bath 14, the one end that water bath 14 was kept away from to inlet tube 35 is connected with the water source simultaneously, control assembly 36 sets up on mounting bracket 31, and the vertical removal of floating block 34 drives slide bar 32 and removes and touch control assembly 36, thereby control assembly 36 controls opening or the closed water yield that controls in the water bath 14 of inlet tube 35.

The control assembly 36 comprises a first inductor 361, a second inductor 362 and a solenoid valve 363, wherein the first inductor 361 and the second inductor 362 are vertically installed on the mounting frame 31 at intervals, the first inductor 361 is located above the second inductor 362, and meanwhile, the first inductor 361 and the second inductor 362 are both stroke switches of model WLCA 2-2; the electromagnetic valve 363 is installed on the water inlet pipe 35 and electrically connected with both the first inductor 361 and the second inductor 362, and the sliding rod 32 between the first inductor 361 and the second inductor 362 is fixedly provided with the induction block 321; the water level in the water bath 14 varies within a range between the lowest point of the rotary bottle 13 and the top end of the water bath 14, and when the water level is at the highest point, the sensing block 321 touches the first sensor 361, and when the water level is at the lowest point, the sensing block 321 touches the second sensor 362.

After the water bath 14 is heated for a period of time, the water amount in the water bath 14 is reduced, the water level in the water bath 14 is lowered, the water level is lowered to drive the floating block 34 to move downwards, the floating block 34 moves downwards to drive the detection rod 33 and the sliding rod 32 to move downwards, the sliding rod 32 moves downwards to drive the induction block 321 to touch the second inductor 362, the second inductor 362 controls the electromagnetic valve 363 to open the water inlet pipe 35 to add water to the water bath 14, then the water level is raised to drive the induction block 321 to touch the first inductor 361, the first inductor 361 controls the electromagnetic valve 363 to close the water inlet pipe 35, so that the water amount in the water bath 14 is automatically controlled, the water level in the water bath 14 is ensured, and the heating efficiency of the water bath 14 to the rotary bottle 13 is improved; and simultaneously, the probability of dry burning of the water bath 14 is reduced.

Referring to fig. 2 and 3, two opposite side walls of the sliding rod 32 are provided with vertical sliding grooves 322, two rollers 15 are rotatably mounted on the mounting frame 31 below the fixing block 16 at intervals, and the two rollers 15 are respectively located at two sides of the sliding rod 32 and roll on the sliding grooves 322; an adjusting device 4 for vertically adjusting a first inductor 361 and a second inductor 362 is arranged on the mounting frame 31, the adjusting device 4 comprises an adjusting plate 41, a mounting plate 42, a sliding block 43 and an adjusting screw 44, and the adjusting plate 41 is fixedly mounted on the mounting frame 31 and is in a vertical state; the adjusting plate 41 is vertically provided with two parallel waist-shaped holes 411, the mounting plates 42 are vertically arranged at intervals, and the mounting plates 42 are vertically arranged on the waist-shaped holes 411 in a sliding manner; two sliding blocks 43 are arranged, the sliding blocks 43 are fixedly arranged on the side wall of the mounting plate 42 close to one side of the adjusting plate 41, and meanwhile, the sliding blocks 43 are vertically arranged in the waist-shaped holes 411 in a sliding manner; the adjusting screw 44 passes through the slotted hole 411 and is in threaded connection with the sliding block 43, meanwhile, the adjusting screw 44 abuts against the side wall of the adjusting plate 41 on the side away from the mounting plate 42, and the mounting plate 42 abuts against the adjusting plate 41 under the action of the adjusting screw 44.

The adjustment screw 44 is loosened, the adjustment screw 44 is then grasped to move the mounting plate 42, thereby moving the positions of the first sensor 361 and the second sensor 362, and after the movement is completed, the adjustment screw 44 is tightened to fix the positions of the first sensor 361 and the second sensor 362, thereby controlling the amount of water in the water bath 14 to accommodate heating of the spinner bottle 13 at different positions. The adjusting screw 44 is a thumb screw, so that the adjusting screw 44 can be screwed without using a tool when the adjusting screw 44 is screwed, thereby achieving the purpose of conveniently screwing the adjusting screw 44.

Referring to fig. 1 and 4, two protective covers 5 enclosing the water bath 14 are mounted at the top end of the water bath 14, the two protective covers 5 are arranged at intervals along the direction from the detection rod 33 to the rotary bottle 13, an opening 51 through which the rotary bottle 13 can pass is formed in the protective cover 5 close to one side of the rotary bottle 13, a through hole 52 through which the detection rod 33 and the water inlet pipe 35 can pass is formed in the protective cover 5 close to one side of the detection rod 33, and the lower side wall of the protective cover 5 is placed at the top end of the water bath 14; all fixed mounting has grafting pole 53 on the mutual lateral wall that is close to of two protection casings 5, and offers on the protection casing 5 with grafting pole 53 grafting complex inserting groove 54, fixed mounting has the joint ring 55 that is the semi-annular on the lateral wall under the protection casing 5 simultaneously, and the joint ring 55 on two protection casings 5 surrounds and is annular and joint installation on water bath 14.

The two protective covers 5 are fixedly arranged together by inserting the inserting rod 53 on one protective cover 5 into the inserting groove 54 on the other protective cover 5, and then the protective covers 5 are placed at the top end of the water bath kettle 14 and the clamping ring 55 is clamped and arranged on the water bath kettle 14, so that the two protective covers 5 are arranged on the water bath kettle 14; when the protective cover 5 needs to be detached, the protective cover 5 is held to move upwards, the clamping ring 55 is detached from the water bath 14, the protective cover 5 is pulled to separate the insertion rod 53 from the insertion groove 54, so that the two protective covers 5 are detached, and the purpose that the protective cover 5 is convenient to mount and detach is achieved. The end of the plug rod 53 remote from the shield 5 is provided with a chamfer 531, and the chamfer 531 guides the plug rod 53 when the plug rod 53 is plugged into the plug groove 54, so as to plug the plug rod 53 into the plug groove 54.

The implementation principle of the embodiment is as follows:

the solution is filled into the rotary bottle 13, then the rotary bottle 13 is arranged on the rotary pipe 22, the rotary motor 21 is started to drive the rotary bottle 13 to rotate, and the water bath pot 14 heats the rotary bottle 13, so that the solution in the rotary bottle 13 is heated.

After the water bath 14 is heated for a period of time, the amount of water in the water bath 14 is reduced, when the water level in the water bath 14 is lowered to drive the induction block 321 to move downwards to touch the second inductor 362, the second inductor 362 controls the electromagnetic valve 363 to open the water inlet pipe 35 to add water to the water bath 14, and then when the water level is raised to drive the induction block 321 to touch the first inductor 361, the first inductor 361 controls the electromagnetic valve 363 to close the water inlet pipe 35, so that the amount of water in the water bath 14 is automatically controlled, the water level in the water bath 14 is ensured, and the heating efficiency of the water bath 14 on the rotary bottle 13 is improved; meanwhile, the probability of dry burning of the water bath 14 is reduced, and the service life of the water bath 14 is prolonged.

The adjustment screw 44 is loosened, the mounting plate 42 is moved to move the positions of the first sensor 361 and the second sensor 362, and after the movement is completed, the adjustment screw 44 is tightened to fix the positions of the first sensor 361 and the second sensor 362, so as to control the water amount in the water bath 14, thereby adapting to the heating of the rotary bottles 13 at different positions.

The two protective covers 5 are arranged on the water bath 14 by inserting the inserting rod 53 on one protective cover 5 into the inserting groove 54 on the other protective cover 5 and then clamping and installing the clamping ring 55 on the water bath 14; when the protection casing 5 is dismantled to needs, it moves upwards to grasp protection casing 5, dismantle joint ring 55 from water bath 14, pulling protection casing 5 breaks away from grafting pole 53 from inserting groove 54, detach two protection casings 5 with this, thereby reach protection casing 5 purpose easy to assemble and dismantlement, the quantity of water evaporation in the water bath 14 when having reduced water bath 14 heating through protection casing 5 simultaneously, thereby the loss of the interior water yield of water bath 14 has been reduced, the thermal loss in the water bath 14 has also been reduced simultaneously, the heating efficiency of water bath 14 to the solution has been improved.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a heating device of rotatory evaporimeter, includes frame (1), sets up support (11) on frame (1), be provided with rotary device (2) on support (11), be provided with rotatory bottle (13) on rotary device (2), be located be provided with water bath (14) on support (11) of rotatory bottle (13) below, the body of rotatory bottle (13) is placed in water bath (14), its characterized in that: be provided with water control device (3) of the interior water yield of control water bath (14) on frame (1), water control device (3) include mounting bracket (31), slide bar (32), detection pole (33), floating block (34), inlet tube (35), control assembly (36), mounting bracket (31) set up on frame (1), slide bar (32) vertical the setting on mounting bracket (31), detection pole (33) set up on slide bar (32) and extend in water bath (14), floating block (34) set up on the lower lateral wall of detection pole (33), inlet tube (35) set up on mounting bracket (31) and be connected with the water source and extend in water bath (14), control assembly (36) set up on mounting bracket (31), just mounting bracket floating block (34) drive slide bar (32) vertical removal and touch control assembly (36) and come the opening or the closure of controlling inlet tube (35) to control the water bath (14) in water bath (14) Amount of the compound (A).

2. A heating device of a rotary evaporator according to claim 1, wherein: the control assembly (36) comprises a first sensor (361), a second sensor (362) and a solenoid valve (363), the first sensor (361) and the second sensor (362) are arranged on the mounting frame (31) at intervals up and down, and the solenoid valve (363) is arranged on the water inlet pipe (35) and is electrically connected with the first sensor (361) and the second sensor (362); when the sliding rod (32) moves downwards to touch the second sensor (362), the second sensor (362) controls the electromagnetic valve (363) to open the water inlet pipe (35) to add water into the water bath (14), and when the sliding rod (32) moves upwards to touch the first sensor (361), the first sensor (361) controls the electromagnetic valve (363) to close the water inlet pipe (35).

3. A heating device of a rotary evaporator according to claim 1, wherein: seted up on the relative both sides wall of slide bar (32) and be vertical groove (322) that slide, it is provided with gyro wheel (15) that roll on two grooves (322) that slide to rotate on mounting bracket (31).

4. A heating device of a rotary evaporator according to claim 1, wherein: and the mounting rack (31) is provided with an adjusting device (4) for vertically adjusting the positions of the first inductor (361) and the second inductor (362).

5. A heating device of a rotary evaporator according to claim 4, wherein: adjusting device (4) include regulating plate (41), mounting panel (42), sliding block (43), adjusting screw (44), regulating plate (41) vertical setting is on mounting bracket (31), regulating plate (41) is vertical to be seted up waist shape hole (411) of two parallels, the vertical interval of mounting panel (42) is on regulating plate (41), first inductor (361) and second inductor (362) set up respectively on two upper and lower regulating plate (41), sliding block (43) set up on mounting panel (42) and the vertical setting of sliding on waist shape hole (411), adjusting screw (44) threaded connection just supports tightly on regulating plate (41) on sliding block (43).

6. A heating device of a rotary evaporator according to claim 5, wherein: the adjusting screw (44) is a thumb screw.

7. A heating device of a rotary evaporator according to claim 1, wherein: the water bath kettle is characterized in that two protective covers (5) which surround and block openings (51) of the water bath kettle (14) are arranged at the top end of the water bath kettle (14), the protective covers (5) are provided with openings (51) through which the rotary bottles (13) can pass, and the protective covers (5) are provided with through holes (52) through which the detection rods (33) and the water inlet pipes (35) can pass.

8. A heating apparatus of a rotary evaporator according to claim 7, wherein: two the mutual adjacent lateral wall of protection casing (5) is provided with plug rod (53) and with plug rod (53) grafting complex inserting groove (54) at the interval, just be provided with joint ring (55) that the joint was installed on water bath (14) and is annular on the lateral wall under protection casing (5).

9. A heating apparatus of a rotary evaporator according to claim 8, wherein: one end of the insertion rod (53) far away from the protective cover (5) is provided with a chamfer (531).