An automatic multi-position rotary evaporator

Abstract

The present invention discloses an automatic multi-position rotary evaporator, belonging to the technical field of evaporation test equipment. The evaporator includes a constant temperature water bath and an annular multi-position bottle clamp. A plurality of hollow and rotatable rotary bottle clamps are evenly arranged along the circumference on the annular multi-position bottle clamp. The upper ports of all the rotary bottle clamps are communicated with the same condenser tube located above the annular multi-position bottle clamp. The lower port of each rotary bottle clamp is detachably and coaxially rotatably connected to a distillation flask, and the distillation flask is placed in the annular pot body of the constant temperature water bath in an umbrella shape and inclined downward at a certain angle. The automatic multi-position rotary evaporator of the present invention can be configured with multiple distillation flasks, rotate cooperatively without affecting each other, and has high efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of evaporation test equipment, and particularly relates to an automatic multi-position rotary evaporator. Background Art

[0002] Most of the existing rotary evaporators on the market are single-bottle, while the number of samples is often relatively large during the actual use by users, and the evaporation efficiency one by one is relatively low.

[0003] In order to improve the working efficiency of evaporation, multi-position rotary evaporators have also emerged on the market in the past two years. However, in the prior art, multiple bottles' rotating shafts are connected to a revolving ring for continuous rotary evaporation. The improvement of this device can improve the detection efficiency to a certain extent, but there are also the following problems:

[0004] 1) Since each evaporation bottle will be in a suspended state for a long time during the revolution process, the time of the sample in the constant temperature water bath is greatly reduced;

[0005] 2) The sample contained in each distillation bottle should be much less than the carrying capacity of a single-bottle rotary evaporator. Otherwise, for the evaporation bottle at a high position during revolution, the sample therein will fall back to the bottleneck, resulting in the risk of sample loss and cross-contamination;

[0006] 3) This device will cause great waste in terms of time and space. The current rotary evaporator has low efficiency and cannot meet the requirement of improving efficiency. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an automatic multi-position rotary evaporator.

[0008] To achieve the above purpose, the present invention is implemented by the following technical solutions.

[0009] The present invention provides an automatic multi-position rotary evaporator, including a constant temperature water bath and a ring-shaped multi-position bottle clamp. A plurality of hollow and rotatable rotary bottle clamps are evenly arranged along the circumferential direction on the ring-shaped multi-position bottle clamp. The upper ports of all the rotary bottle clamps are communicated with the same condenser tube located above the ring-shaped multi-position bottle clamp. The lower port of each rotary bottle clamp is detachably and coaxially rotatably connected to a distillation bottle, and the distillation bottle is placed in the ring-shaped pot body of the constant temperature water bath in an umbrella shape and inclined downward at a certain angle.

[0010] Further, the rotary bottle clamp includes a hollow clamp body, a torque motor, and a rotary connecting tube;

[0011] The hollow clamp body is fixedly arranged inside the ring-shaped multi-position bottle clamp, and the hollow cavity is inclined at a certain angle relative to the ring-shaped multi-position bottle clamp. A conduit communicating with the condenser tube is fixedly connected at the upper port of the hollow clamp body;

[0012] The torque motor is fixedly arranged in the hollow cavity of the hollow hoop body. A rotary connecting pipe is coaxially and fixedly inserted through the hollow rotor of the torque motor. One end of the rotary connecting pipe extends into the conduit connected to the upper port of the hollow hoop body, and the other end extends out of the lower port of the hollow hoop body and is fixedly connected to the distillation flask.

[0013] Furthermore, a circular slot for inserting the conduit is circumferentially formed on the upper port end face of the hollow hoop body. A spring and a sealing ring arranged at the top of the spring are coaxially arranged at the bottom of the circular slot. A plurality of gaps communicating with the circular slot are formed on the side face of the upper port, and a tension lock for pulling and tightening the gaps is sleeved on the side face of the upper port. Under the squeezing and tightening action of the spring and the tension lock, the sealing ring seals the gap between the conduit nozzle and the inner wall of the circular slot.

[0014] Furthermore, a rubber interface ring with a circumferential groove is sleeved on the outer surface of the other end of the rotary connecting pipe. The bottle mouth of the distillation flask is inserted into the groove of the rubber interface ring and is tightened and fixed by a tension lock.

[0015] Furthermore, a gas sensor extending towards one end of the rotary connecting pipe is arranged in the upper port of the hollow hoop body.

[0016] Furthermore, it further includes a main control frame. A main controller and a lifting mechanism are arranged on the main control frame. The lifting mechanism is connected to the circular multi-position bottle hoop in a liftable manner. The main controller is electrically connected to the lifting mechanism, the torque motor, the temperature sensor, and the constant temperature water bath respectively.

[0017] Furthermore, the number of the distillation flasks is 4, 6, or 8.

[0018] Furthermore, the condenser tube is in a straight tube shape or a spherical shape; a condensate collection bottle is connected below the condenser tube; a three-way valve is arranged at the upper part of the condenser tube, and a reflux port is arranged at the lower part.

[0019] Furthermore, all the rotary bottle hoops are configured to rotate clockwise or counterclockwise around the center of the circular multi-position bottle hoop as a whole.

[0020] Furthermore, the lifting mechanism is an electric control cylinder or a hydraulic electric cylinder.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The automatic multi-position rotary evaporator of the present invention adopts a supporting constant temperature water bath and a circular multi-position bottle hoop, and a plurality of rotary bottle hoops for connecting the distillation flask and the condenser tube and capable of individually driving the respective connected distillation flasks to rotate are uniformly arranged circumferentially on the circular multi-position bottle hoop. It can be configured with multiple distillation flasks, rotates in coordination without mutual influence, and has high efficiency. Description of the Drawings

[0022] Figure 1 It is a three-dimensional schematic diagram of an automatic multi-position rotary evaporator provided according to an embodiment of the present invention.

[0023] Figure 2 It is a top view of an automatic multi-position rotary evaporator provided according to an embodiment of the present invention.

[0024] Figure 3 It is a side view of an automatic multi-position rotary evaporator provided according to an embodiment of the present invention.

[0025] Figure 4 It is a three-dimensional schematic diagram of a rotary bottle hoop provided according to an embodiment of the present invention.

[0026] Figure 5 It is a side view of a rotary bottle hoop provided according to an embodiment of the present invention.

[0027] Figure 6 It is a cross-sectional view of a rotary bottle hoop provided according to an embodiment of the present invention.

[0028] In the figure:

[0029] 1, main control frame; 2, constant temperature water bath; 3, annular multi-position bottle hoop; 4, rotary bottle hoop; 5, distillation flask; 6, conduit; 7, condenser; 8, lifting mechanism; 9, hollow hoop body; 10, torque motor; 11, rotary connecting pipe; 12, annular slot; 13, spring; 14, sealing ring; 15, notch; 16, condensate collection bottle; 17, rubber interface ring; 18, groove; 19, gas sensor; 20, main controller. Specific embodiments

[0030] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention.

[0031] As Figure 1 , Figure 2 and Figure 3 shown, an automatic multi-position rotary evaporator provided in an embodiment of the present invention includes a constant temperature water bath 2 and an annular multi-position bottle hoop 3. A plurality of hollow and rotatable rotary bottle hoops 4 are uniformly arranged along the circumference on the annular multi-position bottle hoop 3. The upper ports of all the rotary bottle hoops 4 are communicated with the same condenser 7 located above the annular multi-position bottle hoop 3. The lower port of each rotary bottle hoop 4 is detachably and coaxially rotatably connected to a distillation flask 5. The distillation flask 5 is placed in the annular pot body of the constant temperature water bath 2 in an umbrella shape and inclined downward at a certain angle.

[0032] In order to maximize the efficiency of the rotary evaporator in terms of time and space, the invention designs an annular constant temperature water bath 2, as well as a rotating shaft and evaporation flasks that are evenly distributed downward in an umbrella shape. Each evaporation flask realizes self-rotation in the water bath, making the most of the volume of the evaporation flask, and not increasing the probability of sample falling back and contaminating the part above the rotating shaft, and can safely and efficiently complete the simultaneous rotary evaporation of multiple samples.

[0033] In this embodiment, the number of distillation flasks 5 is 4, 6 or 8.

[0034] The condenser tube 7 is in a straight tube shape or a spherical shape. A condensate collection flask 16 is connected to the lower part of the condenser tube 7. A three-way valve is arranged at the upper part of the condenser tube 7, and a reflux port is arranged at the lower part.

[0035] In this embodiment, as Figure 4 、 Figure 5 and Figure 6 shown, the rotary flask hoop 4 includes a hollow hoop body 9, a torque motor 10, and a rotary connecting tube 11. The hollow hoop body 9 is fixedly arranged inside the annular multi-position flask hoop 3 and the hollow cavity is inclined at a certain angle relative to the annular multi-position flask hoop 3. A conduit 6 communicating with the condenser tube 7 is fixedly connected at the upper port of the hollow hoop body 9.

[0036] The torque motor 10 is fixedly arranged in the hollow cavity of the hollow hoop body 9. A rotary connecting tube 11 is coaxially fixedly inserted through the hollow rotor of the torque motor 10. One end of the rotary connecting tube 11 extends into the conduit 6 connected to the upper port of the hollow hoop body 9, and the other end extends out of the lower port of the hollow hoop body 9 and is fixedly connected to the distillation flask 5.

[0037] An annular slot 12 for inserting the conduit 6 is circumferentially formed on the upper port end face of the hollow hoop body 9. A spring 13 and a sealing ring 14 arranged on the top of the spring 13 are coaxially arranged at the bottom of the annular slot 12. A plurality of notches 15 communicating with the annular slot 12 are formed on the side surface of the upper port, and a tension lock for pulling and tightening the notches 15 is sleeved on the side surface of the upper port. The sealing ring 14 is sealed at the gap between the pipe orifice of the conduit 6 and the inner wall of the annular slot 12 under the squeezing and tightening action of the spring 13 and the tension lock.

[0038] A rubber interface ring 17 with a circumferential groove 18 is sleeved on the outer surface of the other end of the rotary connecting tube 11. The bottle mouth of the distillation flask 5 is inserted into the groove 18 of the rubber interface ring 17 and fixed by a tension lock.

[0039] Among them, the rubber interface ring 17 is made of rubber material and is fixed on the outer surface of the other end of the rotary connecting tube 11 by means of glue bonding or the like.

[0040] Specifically, the above-mentioned tension lock can adopt various conventional forms such as a tension ring, a locking ring, a fastening ring, etc., or can also be tensioned and fixed by means of a tape ring.

[0041] In this embodiment, in order to facilitate monitoring whether the distillation flask 5 is completely evaporated, a pressure or humidity sensor extending towards one end of the rotary connecting pipe 11 is arranged in the upper port of the hollow hoop 9.

[0042] In some embodiments, the annular multi-position bottle hoop 3 can also drive all the rotary bottle hoops 4 to rotate around the center, so that each rotary bottle hoop 4 and the connected distillation flask 5 rotate independently and as a whole following the annular multi-position bottle hoop 3 in the annular pot of the constant temperature water bath 2, so as to make the distillation flask 5 heated evenly and have a high evaporation efficiency.

[0043] Specifically, the annular multi-position bottle hoop 3 includes a rotary motor, a driving gear and a driven rotary gear. Among them, the output shaft of the rotary motor is connected to the driving gear and synchronously drives the driving gear to rotate. The driving gear meshes with the driven rotary gear and synchronously drives the driven rotary gear to rotate. The driven rotary gear is coaxially and rotatably arranged on the annular multi-position bottle hoop 3, and each rotary bottle hoop 4 is fixedly arranged on the driven rotary gear and can rotate clockwise or counterclockwise around the annular center following the driven rotary gear.

[0044] Specifically, both the driving gear and the driven rotary gear can adopt the meshing bevel gear transmission mode.

[0045] During the use of the rotary evaporator, a large amount of time is required to pay attention to the evaporation situation, and the volume of the sample required after evaporation is estimated by the naked eye to determine the end point. And in actual experiments, the experimenter may conduct multiple experiments at the same time. If the evaporation situation is not paid attention to in time, there may be a risk of complete evaporation and experimental failure. Based on this, the present invention designs a timing function. After reaching the set time, the evaporation flask is lifted out of the water surface and stops rotating, and evaporation is no longer carried out. At the same time, a pressure or humidity sensor is added at the bottleneck of each evaporation flask. If the air pressure or humidity in the bottle drops to a certain threshold, it means that there is a risk of complete evaporation of the sample. At this time, the lifting mechanism is triggered to lift the sample bottle out of the water surface and stop rotating.

[0046] In this embodiment, the automatic multi-position rotary evaporator further includes a main control frame 1. A main controller 20 and a lifting mechanism 8 are arranged on the main control frame 1. The lifting mechanism 8 is connected to the annular multi-position bottle hoop 3 in a liftable manner. The main controller 20 is electrically connected to the lifting mechanism 8, the torque motor 10, the temperature sensor and the constant temperature water bath 2 respectively.

[0047] Among them, the lifting mechanism 8 can adopt an electric control cylinder or a hydraulic electric cylinder, etc.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are 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 operated in a specific orientation, and thus should not be construed as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0049] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0050] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An automatic multi-position rotary evaporator, characterized in that, It includes a constant temperature water bath and a circular multi-position bottle clamp. A number of hollow and rotatable rotating bottle clamps are evenly arranged along the circumference on the circular multi-position bottle clamp. The upper ports of all the rotating bottle clamps communicate with the same condenser tube located above the circular multi-position bottle clamp. The lower port of each rotating bottle clamp is detachably and coaxially rotatably connected to a distillation flask, and the distillation flask is placed in the circular pot body of the constant temperature water bath in an umbrella shape and inclined downward at a certain angle. The rotating bottle clamp includes a hollow clamp body, a torque motor, and a rotating connecting tube. The hollow clamp body is fixedly arranged inside the circular multi-position bottle clamp, and the hollow cavity is inclined at a certain angle relative to the circular multi-position bottle clamp. A conduit communicating with the condenser tube is fixedly connected at the upper port of the hollow clamp body. The torque motor is fixedly arranged in the hollow cavity of the hollow clamp body. A rotating connecting tube is coaxially fixedly inserted through the hollow rotor of the torque motor. One end of the rotating connecting tube extends into the conduit connected at the upper port of the hollow clamp body, and the other end extends out of the lower port of the hollow clamp body and is fixedly connected to the distillation flask. A circular slot for inserting the conduit is circumferentially opened on the upper port end face of the hollow clamp body. A spring and a sealing ring arranged on the top of the spring are coaxially arranged at the bottom of the circular slot. A number of notches communicating with the circular slot are opened on the side of the upper port, and a tension lock for pulling and tightening the notches is sleeved on the side of the upper port. Under the squeezing and tightening action of the spring and the tension lock, the sealing ring seals the gap between the conduit pipe orifice and the inner wall of the circular slot. A rubber interface ring with a circumferential groove is sleeved on the outer surface of the other end of the rotating connecting tube. The bottle mouth of the distillation flask is inserted into the groove of the rubber interface ring and tightened and fixed by a tension lock. A gas sensor extending towards one end of the rotating connecting tube is arranged in the upper port of the hollow clamp body. It also includes a main control frame. A main controller and a lifting mechanism are arranged on the main control frame. The lifting mechanism is connected to the circular multi-position bottle clamp in a liftable manner. The main controller is electrically connected to the lifting mechanism, the torque motor, and the constant temperature water bath respectively. A condensate collection bottle is connected below the condenser tube. A three-way valve is arranged on the upper part of the condenser tube, and a reflux port is arranged on the lower part.

2. The automatic multi-position rotary evaporator according to claim 1, wherein The number of the distillation flasks is 4, 6, or 8.

3. The automatic multi-position rotary evaporator according to claim 1, wherein The condenser tube is in a straight pipe shape or a spherical shape.

4. The automatic multi-position rotary evaporator according to any one of claims 1 to 3, characterized in that, All the rotating bottle clamps are configured to rotate clockwise or counterclockwise around the center of the circular multi-position bottle clamp as a whole.

5. The automatic multi-position rotary evaporator according to claim 4, characterized in that, The lifting mechanism is an electric control cylinder or a hydraulic electric cylinder.

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