Sealing shaft of rotary evaporator

Abstract

The utility model discloses a sealing shaft of a rotary evaporator, and relates to the field of fine chemical engineering. The rotary evaporator sealing shaft comprises a rotating hollow shaft which is arranged at the output end of a driving motor in a rotary evaporator; the distillation flask is mounted at the end part of the rotating hollow shaft through a detachable connecting assembly; an inner groove is formed in one end, close to the distillation flask, in the rotating hollow shaft; through cooperative use of the detachable connecting assembly, the inner groove, the first outer groove, the first sealing ring, the sealing air bag ring and other parts, when the distillation flask is mounted on the rotating hollow shaft, not only can the distillation flask be stably inserted into the rotating hollow shaft, but also double sealing can be performed between the distillation flask and the rotating hollow shaft, so that the distillation flask can be conveniently mounted on the rotating hollow shaft, and the service life of the distillation flask is prolonged. The air tightness between the distillation flask and the rotating hollow shaft is effectively ensured, and the possibility of air leakage at the joint of the distillation flask and the rotating hollow shaft is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fine chemical industry, in particular to a sealing shaft of a rotary evaporator. Background Art

[0002] The rotary evaporator places an evaporating flask in high-temperature water in a water bath and rotates the evaporating flask at a constant speed. While the test liquid in the evaporating flask is heated at a constant temperature by the high-temperature water in the water bath, the rotating evaporating flask causes the test liquid to hang on the inner wall of the evaporating flask, causing the test liquid in the evaporating flask to heat up quickly, diffuse and evaporate. It is an evaporation instrument widely used in laboratories, consisting of a motor, a rotating hollow shaft, 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 therefore has been widely used in the field of fine chemicals.

[0003] In the prior art, before rotary evaporation of the test liquid, the test liquid needs to be added into a distillation flask first, and then the distillation flask is sealed and clamped on the rotating hollow shaft through a connector and a sealing gasket. Although this connection method can also achieve a sealed connection of the distillation flask, the sealing effect may be low if only one sealing gasket is used to seal the connection. In addition, since a large amount of heat is generated during evaporation, the sealing performance of the sealing gasket will gradually decrease after being repeatedly heated for a long time, so that there may be a risk of leakage at the connection between the distillation flask and the rotating hollow shaft. In view of this, the present utility model is specially proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a rotary evaporator sealing shaft which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a rotary evaporator sealing shaft, comprising: a rotating hollow shaft, installed at the output end of a driving motor in the rotary evaporator; a distillation flask, installed at the end of the rotating hollow shaft through a detachable connecting assembly; an inner groove is provided at one end of the rotating hollow shaft close to the distillation flask; a first outer groove is provided at the bottle mouth of the outer wall of the distillation flask, and the outer diameter of the first outer groove is smaller than the inner diameter of the rotating hollow shaft; a first sealing ring is fixedly connected to the inner wall of the rotating hollow shaft near the inner groove; a sealing airbag ring is fixedly connected to the inner groove of the rotating hollow shaft.

[0006] In order to further improve the sealing between the rotating hollow shaft and the distillation flask, the distillation flask is further provided with a second outer groove near the first outer groove, the diameter of the second outer groove is larger than the diameter of the first outer groove, and a second sealing ring is fixedly connected to the side of the sealing airbag ring away from the first sealing ring in the inner groove.

[0007] Furthermore, the detachable connection assembly includes an L-shaped fixing rod, which is connected to the distillation flask near the bottle mouth in a circularly equidistant manner through a hinge seat, and a circle of limiting rings is fixedly connected to the outer surface of the rotating hollow shaft near the distillation flask.

[0008] In order to facilitate the L-shaped fixing rod to be more smoothly clamped onto the limiting ring, further, a circle of inclined ring is fixedly connected to the outer side of the limiting ring.

[0009] In order to prevent the L-shaped fixing rod from scratching the smooth surfaces of the limiting ring and the tilting ring, further, an arc chamfer is provided at one end of the L-shaped fixing rod away from the hinge seat, and the arc chamfer is located on the side close to the limiting ring.

[0010] In order to facilitate improving the stability of the L-shaped fixing rod clamped on the limiting ring, further, a movable ring is slidably connected to the rotating hollow shaft on the side of the limiting ring away from the distillation flask, a first through opening is provided at one end of the L-shaped fixing rod close to the limiting ring, a second through opening connected to the first through opening is provided on the limiting ring, and an insertion rod used in conjunction with the first through opening is fixedly connected to the side of the movable ring close to the limiting ring.

[0011] In order to improve the stability of the insertion of the rod into the first through hole and the second through hole, further, a friction layer is provided on the inner side wall of the limiting ring.

[0012] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model, through the coordinated use of components such as the detachable connecting assembly, the inner groove, the first outer groove, the first sealing ring and the sealing airbag ring, can not only make the distillation flask firmly plugged into the rotating hollow shaft when the distillation flask is installed on the rotating hollow shaft, but also can perform double sealing between the distillation flask and the rotating hollow shaft, effectively ensuring the airtightness between the distillation flask and the rotating hollow shaft, and reducing the possibility of air leakage at the connection between the distillation flask and the rotating hollow shaft.

[0013] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In the attached picture:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 For this utility model Figure 2The structural diagram of part A in the figure;

[0018] Figure 4 The schematic diagram of the deployment structure of the rotating hollow shaft, the distillation bottle, the first sealing ring, the second sealing ring and the sealing airbag ring in the utility model Figure 1 ;

[0019] Figure 5 The schematic diagram of the deployment structure of the rotating hollow shaft, the distillation bottle, the first sealing ring, the second sealing ring and the sealing airbag ring in the utility model Figure 2 .

[0020] In the figure: 1. rotating hollow shaft; 101. inner groove; 102. first sealing ring; 103. sealing airbag ring; 104. second sealing ring; 2. distillation flask; 201. first outer groove; 202. second outer groove; 3. L-shaped fixing rod; 301. limiting ring; 3011. tilting ring; 302. moving ring; 303. insertion rod. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0022] Embodiment 1:

[0023] Reference Figure 1-Figure 5 The rotary evaporator sealing shaft comprises: a rotating hollow shaft 1, which is installed at the output end of a driving motor in the rotary evaporator; a distillation flask 2, which is installed at the end of the rotating hollow shaft 1 through a detachable connecting component; an inner groove 101 is provided at one end of the rotating hollow shaft 1 near the distillation flask 2; a first outer groove 201 is provided at the bottle mouth of the outer wall of the distillation flask 2, and the outer diameter of the first outer groove 201 is smaller than the inner diameter of the rotating hollow shaft 1; a first sealing ring 102 is fixedly connected to a position of the inner wall of the rotating hollow shaft 1 near the inner groove 101; a sealing airbag ring 103 is fixedly connected to the inner groove 101 of the rotating hollow shaft 1.

[0024] The detachable connection assembly includes an L-shaped fixing rod 3, which is connected to the position of the distillation flask 2 near the bottle mouth in a circularly equidistant manner through a hinge seat, and a circle of limiting ring 301 is fixedly connected to the outer surface of the rotating hollow shaft 1 near the distillation flask 2.

[0025] During the assembly of the rotary evaporator, when it is necessary to install the distillation flask 2 at the end of the rotating hollow shaft 1 away from the condenser, the staff can insert the bottle mouth of the distillation flask 2 into the port of the rotating hollow shaft 1. Since a circle of inner groove 101 and a first outer groove 201 are respectively provided in the port of the rotating hollow shaft 1 and the bottle mouth of the distillation flask 2, and a circle of sealing airbag ring 103 is provided in the inner groove 101, when the distillation flask 2 is inserted into the rotating hollow shaft 1, the sealing airbag ring 103 will be squeezed due to the action of the inner groove 101 of the rotating hollow shaft 1 and the first outer groove 201 of the distillation flask 2 approaching each other, and then the squeezed sealing airbag ring 103 will be tightly attached to the groove walls of the inner groove 101 and the first outer groove 201, thereby The rotating hollow shaft 1 and the distillation flask 2 can be sealed, and at the same time, the first sealing ring 102 is fixedly connected to the inner wall of the rotating hollow shaft 1 near the inner groove 101. Therefore, when the distillation flask 2 is plugged into place, the inner wall of the first sealing ring 102 will be tightly attached to the distillation flask 2, so that the rotating hollow shaft 1 and the distillation flask 2 can be sealed for the second time, which effectively improves the airtightness between the rotating hollow shaft 1 and the distillation flask 2. When the distillation flask 2 is plugged into place, the L-shaped fixing rod 3 can be rotated to make the L-shaped fixing rod 3 clamped on the limiting ring 301, and then the distillation flask 2 is released. At this time, the L-shaped fixing rod 3 will be tightly against the limiting ring 301 under the reaction of the sealing airbag ring 103, thereby ensuring the stability of the connection between the rotating hollow shaft 1 and the distillation flask 2.

[0026] Embodiment 2:

[0027] Reference Figure 1-Figure 5 , the sealing shaft of the rotary evaporator is basically the same as that of Example 1, and further: a second outer groove 202 is opened at a position of the distillation flask 2 close to the first outer groove 201, the diameter of the second outer groove 202 is larger than the diameter of the first outer groove 201, and a second sealing ring 104 is fixedly connected to the side of the sealing airbag ring 103 in the inner groove 101 away from the first sealing ring 102. Through the arrangement of the second sealing ring 104, when the distillation flask 2 is inserted into the rotating hollow shaft 1, the rotating hollow shaft 1 and the distillation flask 2 can be sealed three times with the cooperation of the first sealing ring 102 and the sealing airbag ring 103, thereby further improving the sealing between the rotating hollow shaft 1 and the distillation flask 2 and reducing the possibility of steam leakage.

[0028] Embodiment 3:

[0029] Reference Figure 1-Figure 5, the sealing shaft of the rotary evaporator is basically the same as that of Example 2, and further: a circle of inclined ring 3011 is fixedly connected to the outer side of the limiting ring 301. By arranging the inclined ring 3011 on the outer side of the limiting ring 301, when the staff rotates the L-shaped fixing rod 3 to make the L-shaped fixing rod 3 clamped on the limiting ring 301, the L-shaped fixing rod 3 can be clamped on the limiting ring 301 more smoothly, thereby improving the convenience of the staff in clamping the L-shaped fixing rod 3 on the limiting ring 301.

[0030] An arc chamfer is provided at one end of the L-shaped fixing rod 3 away from the hinge seat, and the arc chamfer is located on the side close to the limiting ring 301. By providing the arc chamfer on the L-shaped fixing rod 3, when the staff rotates the L-shaped fixing rod 3 so that the L-shaped fixing rod 3 is clamped on the limiting ring 301, the L-shaped fixing rod 3 scratches the smooth surfaces of the limiting ring 301 and the tilting ring 3011.

[0031] A movable ring 302 is slidably connected to the side of the rotating hollow shaft 1 located at the limit ring 301 away from the distillation flask 2, a first through hole is provided at one end of the L-shaped fixed rod 3 close to the limit ring 301, a second through hole connected to the first through hole is provided on the limit ring 301, and an insertion rod 303 used in conjunction with the first through hole and the second through hole is fixedly connected to the side of the movable ring 302 close to the limit ring 301. When the end of the L-shaped fixed rod 3 is clamped on the limit ring 301, it can be pushed The movable ring 302 allows the insertion rod 303 to be inserted into the first through hole and the second through hole, so that the L-shaped fixing rod 3 can be locked, thereby improving the stability of the L-shaped fixing rod 3 being clamped on the limiting ring 301, and preventing the L-shaped fixing rod 3 from being separated from the limiting ring 301 when the driving motor drives the distillation flask 2 to rotate by rotating the hollow shaft 1, thereby preventing the connection between the distillation flask 2 and the rotating hollow shaft 1 from being lost, thereby effectively ensuring the stability and sealing of the connection between the distillation flask 2 and the rotating hollow shaft 1.

[0032] A friction layer is provided on the inner wall of the limiting ring 301. By providing the friction layer on the inner side of the limiting ring 301, the friction force between the limiting ring 301 and the rotating hollow shaft 1 can be increased, thereby improving the stability of the insertion of the rod 303 in the first through-hole and the second through-hole, and preventing the rod 303 from escaping from the first through-hole and the second through-hole when the distillation flask 2 rotates, thereby affecting the stability and sealing of the connection between the distillation flask 2 and the rotating hollow shaft 1.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. A rotary evaporator sealing shaft, characterized in that: include: A rotating hollow shaft (1) is mounted at the output end of a driving motor in a rotary evaporator; A distillation flask (2) is mounted on the end of the rotating hollow shaft (1) via a detachable connection assembly; An inner groove (101) is formed inside the rotating hollow shaft (1) at one end close to the distillation flask (2); A first outer groove (201) is provided at the mouth of the outer wall of the distillation flask (2), and the outer diameter of the first outer groove (201) is smaller than the inner diameter of the rotating hollow shaft (1); A first sealing ring (102) is fixedly connected to the inner wall of the rotating hollow shaft (1) at a position close to the inner groove (101); A sealing airbag ring (103) is fixedly connected inside the inner groove (101) of the rotating hollow shaft (1).

2. The rotary evaporator sealing shaft according to claim 1, characterized in that: The distillation flask (2) is provided with a second outer groove (202) near the first outer groove (201); the diameter of the second outer groove (202) is greater than the diameter of the first outer groove (201); and a second sealing ring (104) is fixedly connected to the inner groove (101) on the side of the sealing airbag ring (103) away from the first sealing ring (102).

3. The rotary evaporator sealing shaft according to claim 1, characterized in that: The detachable connection assembly comprises an L-shaped fixing rod (3), wherein the L-shaped fixing rod (3) is connected to a position of the distillation flask (2) near the bottle mouth in a circularly equidistant manner through a hinge seat, and a circle of limiting rings (301) are fixedly connected to a position of the outer surface of the rotating hollow shaft (1) near the distillation flask (2).

4. The rotary evaporator sealing shaft according to claim 3, characterized in that: The outer side of the limiting ring (301) is fixedly connected to a circle of inclined ring (3011).

5. The rotary evaporator sealing shaft according to claim 4, characterized in that: An arc-shaped chamfer is provided at one end of the L-shaped fixing rod (3) away from the hinge seat, and the arc-shaped chamfer is located on a side close to the limiting ring (301).

6. The rotary evaporator sealing shaft according to claim 3, characterized in that: A movable ring (302) is slidably connected to the rotating hollow shaft (1) at the side of the limiting ring (301) away from the distillation flask (2); a first through hole is provided at one end of the L-shaped fixed rod (3) close to the limiting ring (301); a second through hole is provided on the limiting ring (301) and is connected to the first through hole; and an insertion rod (303) is fixedly connected to the side of the movable ring (302) close to the limiting ring (301) and is used in conjunction with the first through hole and the second through hole.

7. The rotary evaporator sealing shaft according to claim 6, characterized in that: A friction layer is provided on the inner side wall of the limiting ring (301).

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