Rotatable three-way receiving device suitable for distillation

Abstract

A rotatable three-way receiving device suitable for distillation comprises a receiving straight pipe section, a three-way pipe section and connecting bayonets, the connecting bayonets are arranged at the butt joint position of the receiving straight pipe section and the three-way pipe section in a sleeving mode, and the connecting bayonets comprise the first bayonet and the second bayonet. The first bayonet is sleeved on the outer wall of the rear end of the receiving straight pipe section, a first sealing rubber ring is arranged between the first bayonet and the receiving straight pipe section, the second bayonet is sleeved on the outer wall of the front end of the three-way pipe section, a second sealing rubber ring is arranged between the second bayonet and the three-way pipe section, and the first bayonet and the second bayonet are in threaded connection. A third sealing rubber ring is further arranged at the butt joint position of the receiving straight pipe section and the three-way pipe section, and a front end opening of the receiving straight pipe section is connected with a condensation pipe. The three-way receiving tube adopts a sectional structure, and the front section and the rear section tube are in butt joint and are connected through the connecting bayonet of the outer sleeve, so that the rear section tube is convenient to rotate, air leakage is avoided in the rotating process, and the vacuum degree is kept stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a distillation liquid receiving device, especially to a rotatable vacuum tee receiving device of distillation liquid, belong to organic synthesis laboratory glass instrument technical field. BACKGROUND

[0002] Distillation is a thermodynamic separation process, which uses the different boiling points of each component in the mixed liquid or liquid-solid system to evaporate the low-boiling-point component, and then condenses to separate the whole component unit operation process, which is the combination of evaporation and condensation two unit operations. Compared with other separation methods such as extraction, filtration and crystallization, its advantage is that it does not need to use other solvents except the system components, so as to ensure that no new impurities are introduced. Vacuum receiving tube is a glass device used for reducing pressure during distillation. The molecules of the liquid have a tendency to overflow from the surface due to molecular motion. This tendency increases with the increase of temperature. If the liquids with different boiling points and azeotropic liquids are mixed and placed in a closed vacuum system, the liquid molecules continue to overflow and form vapor above the liquid surface, and finally the rate at which the molecules escape from the liquid is equal to the rate at which the molecules return to the liquid from the vapor, and the vapor maintains a certain pressure. At this time, the vapor on the liquid surface is saturated, which is called saturated vapor, and the pressure exerted by the vapor on the liquid surface is called saturated vapor pressure. Experiments have shown that the saturated vapor pressure of a liquid is only related to temperature, that is, a liquid has a certain vapor pressure at a certain temperature. This refers to the pressure of the liquid and its vapor at equilibrium, which is independent of the absolute amount of liquid and vapor in the system. Heating the liquid to boiling makes the liquid into vapor, and then the vapor is cooled and condensed into liquid. The combined operation of these two processes is called distillation. When we need to separate the mixed liquid, we need a receiver with multiple branches. At present, the distillation receiving tube on the market generally adopts frosted mouth to directly seal the connection with the outlet of the condensing tube. This product has the problems of separation of the receiving tube and the condensing tube, switching of the branch, unstable vacuum degree of the distillation system, and easy breakage of the glass tube. For example, patent 201720516176.1 discloses a new type of sulfur dioxide detection distillation device, which mainly comprises a flat bottom distillation flask, an absorption tube, a condensing tube, a receiving tube and a receiving bottle. The receiving tube is directly connected with the tail end of the condensing tube and sealed through a frosted interface. When the frosted interface is separated, the glass tube is easy to break. SUMMARY

[0003] The utility model discloses a rotatable tee receiving device suitable for distillation, the tee receiving tube adopts sectional structure, and the front section and rear section pipe butt joint are connected through the connecting bayonet of the outer sleeve, the rear section pipe is rotated conveniently, and the vacuum degree is kept stable in the process of rotation.

[0004] The utility model discloses a rotatable tee receiving device suitable for distillation, the tee receiving tube adopts sectional structure, and the front section and rear section pipe butt joint are connected through the connecting bayonet of the outer sleeve, the rear section pipe is rotated conveniently, and the vacuum degree is kept stable in the process of rotation.

[0005] A rotatable tee receiving device suitable for distillation, the device comprising a receiving straight pipe section, a tee pipe section and a connecting socket, the connecting socket being sleeved at the butt joint of the receiving straight pipe section and the tee pipe section, the connecting socket comprising a first socket and a second socket, the first socket being sleeved on the rear end outer wall of the receiving straight pipe section, a first sealing rubber ring being arranged between the first socket and the receiving straight pipe section, the second socket being sleeved on the front end outer wall of the tee pipe section, a second sealing rubber ring being arranged between the second socket and the tee pipe section, the first socket and the second socket being threadedly connected, a third sealing rubber ring being further arranged at the butt joint of the receiving straight pipe section and the tee pipe section, and a front end port of the receiving straight pipe section being connected with a condensing pipe.

[0006] The rotatable tee receiving device suitable for distillation, a tail end of the tee pipe section is provided with three branch pipes, an outlet of each of the three branch pipes is provided as a ground joint and is connected with a different receiving bottle, a top of the tail end of the tee pipe section is provided with a separate branch thin pipe, an outlet end of the branch thin pipe is provided as an external thread and is connected with a vacuumizing device.

[0007] The rotatable tee receiving device suitable for distillation, an included angle between two adjacent branch pipes is 40°, and an outlet height of the middle branch pipe is lower than outlet heights of the branch pipes on both sides of the middle branch pipe.

[0008] The rotatable tee receiving device suitable for distillation, the front end port of the receiving straight pipe section is provided as a ground joint.

[0009] The distillation receiving pipe of the utility model has the advantages that: the distillation receiving pipe adopts a two-section structure, the receiving straight pipe section and the tee pipe section are connected through the connecting sockets, the two connecting sockets are connected through threads, so that the receiving straight pipe section and the tee pipe section are sealed and butted, in the use process, the tee pipe section can be directly rotated, the direction of the received distillate is changed, and in the rotating process, the vacuum degree of the whole distillation device can still be kept stable because the rubber rings are arranged between the receiving straight pipe section and the tee pipe section, between the receiving straight pipe section and the first connecting socket and between the tee pipe section and the second connecting socket; the distillation receiving pipe adopts the two-section structure, so that the problem of instrument breakage caused by incorrect rotating position or failure to keep parallel with the whole device is avoided, and the rotation is better. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model will be further described in connection with the drawings.

[0011] Figure 1 It is the whole device structure schematic diagram of the utility model;

[0012] Figure 2 It is the split structure schematic diagram of tee receiving device.

[0013] In the figure: 1, receiving straight pipe section; 2, tee pipe section; 2-1, branch pipe; 2-2, branch thin pipe; 3, connecting socket; 3-1, first socket; 3-2, second socket; 4, first sealing rubber ring; 5, second sealing rubber ring; 6, third sealing rubber ring; 7, condensing pipe; 8, receiving bottle. DETAILED DESCRIPTION

[0014] The utility model will be further described below with reference to the drawings.

[0015] Reference Figure 1 The utility model discloses a rotatable tee receiving device suitable for distillation, including receiving straight pipe section 1, tee pipe section 2 and connecting socket 3, connecting socket 3 is sleeved in the butt joint of receiving straight pipe section 1 and tee pipe section 2, connecting socket 3 includes first socket 3-1 and second socket 3-2, first socket 3-1 is sleeved on the rear end outer wall of receiving straight pipe section 1, and first sealing rubber ring 4 is arranged between the two, second socket 3-2 is sleeved on the front end outer wall of tee pipe section 2, and second sealing rubber ring 5 is arranged between the two, so that tee pipe section can be connected with the inner wall of second buckle sealingly, avoids the air leakage, and also facilitate tee pipe section rotation, first socket 3-1 one end sets the outer thread, and second socket 3-2 one end sets the inner thread, and the two are screwed, so that receiving straight pipe section 1 and tee pipe section 2 are sealingly butted, and the butt joint of receiving straight pipe section 1 and tee pipe section 2 is also provided with third sealing rubber ring 6, and the front end port of receiving straight pipe section 1 is set as frosted mouth and is connected with condensing pipe 7.The tail end of tee pipe section 2 is provided with three branch pipes 2-1, and the outlet of three branch pipes 2-1 is all set as frosted mouth and is connected with different receiving bottles 8 respectively, and the tail end top of tee pipe section 2 is provided with separate branch thin pipe 2-2, and its outlet end is set as outer thread, and it is connected with vacuumizing device.

[0016] The included angle between two adjacent branch pipes 2-1 is 40 °, and the outlet height of the middle branch pipe is lower than the outlet height of the branch pipes on its two sides. Ensure that the distillation condensate flows out of the middle branch pipe, when it is needed to replace the distillate liquid, rotate the tee pipe section gently, always make one of the branch pipes at the bottom end, ensure that the distillate liquid only flows to one receiving bottle. In the distillation process, each instrument is supported and fixed through the pipe frame.

Claims

1. A rotatable tee-receiving device suitable for use in distillation, characterized by: The device comprises a receiving straight pipe section (1), a tee pipe section (2) and a connecting socket (3), the connecting socket (3) is sleeved at the butt joint of the receiving straight pipe section (1) and the tee pipe section (2), the connecting socket (3) comprises a first socket (3-1) and a second socket (3-2), the first socket (3-1) is sleeved on the rear end outer wall of the receiving straight pipe section (1), and a first sealing rubber ring (4) is arranged between the first socket (3-1) and the receiving straight pipe section (1), the second socket (3-2) is sleeved on the front end outer wall of the tee pipe section (2), and a second sealing rubber ring (5) is arranged between the second socket (3-2) and the tee pipe section (2), the first socket (3-1) and the second socket (3-2) are threadedly connected, the butt joint of the receiving straight pipe section (1) and the tee pipe section (2) is further provided with a third sealing rubber ring (6), and the front end port of the receiving straight pipe section (1) is connected with a condenser pipe (7).

2. A rotatable tee-receiving device suitable for use in distillation as defined in claim 1, wherein: Three branch pipes (2-1) are arranged at the tail end of the tee pipe section (2), the outlets of the three branch pipes (2-1) are all arranged as ground-in mouths and are respectively connected with different receiving bottles (8), and a separate branch thin pipe (2-2) is arranged at the top of the tail end of the tee pipe section (2), and the outlet end of the branch thin pipe (2-2) is arranged as an external thread.

3. A rotatable tee-receiving device suitable for use in distillation as defined in claim 2, wherein: The included angle between two adjacent branch pipes (2-1) is 40°, and the outlet height of the middle branch pipe is lower than the outlet height of the branch pipes on the two sides.

4. A rotatable tee-receiving device suitable for use in distillation as defined in claim 3, wherein: The front end port of the receiving straight pipe section (1) is arranged as a ground-in mouth.

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