Mechanical stirring rod connecting and sealing device for high-vacuum chemical experiment

Abstract

The utility model provides a mechanical stirring rod connecting and sealing device for a high-vacuum chemical experiment, and belongs to the technical field of stirrers. The mechanical stirrer solves the major difficult problem that a mechanical stirrer in the prior art is poor in vacuum degree when being used for a high-vacuum chemical experiment. The connecting and sealing device for the mechanical stirring rod comprises a ground glass stirrer sleeve, a latex tube, a red latex cap and a thin iron wire, and is characterized in that the latex tube is cut off after being sleeved at the upper end of the ground glass stirrer sleeve by a little length, the latex tube is sleeved with the red latex cap, and the redundant part is cut off at the part slightly longer than the latex tube; the lower-end latex tube and the rubber cap ring are wound and tightened by thin iron wires, and a small amount of lubricating oil is dripped in the upper-end rubber cap ring. The device is simple and reasonable in structure and easy to implement. The device has the advantages of low cost, stable performance, convenience in use, easiness in popularization, good sealing effect and the like, and has practical and popularization values.

Description

Technical Field

[0001] The utility model belongs to the technical field of stirring, and in particular relates to a connecting and sealing device for a mechanical stirring rod used in a high vacuum chemical experiment. Background Art

[0002] At present, in chemical laboratories, the connection between glass reaction bottles and mechanical stirring rods is commonly made of glass stirring sleeves and polytetrafluoroethylene stirring sleeves. The glass stirring sleeve alone does not have sealing properties. Putting a piece of latex or rubber tube on the glass stirring sleeve has a certain degree of sealing properties, which can keep the base sealed under normal pressure, but it is no longer applicable in high vacuum experiments due to the shaking and frictional heat generated by stirring. For high vacuum experiments under mechanical stirring, such as vacuum distillation, more expensive polytetrafluoroethylene stirring sleeves are still used to ensure high vacuum. However, after one or several uses, the polytetrafluoroethylene stirring sleeve often wears out the stirring rod, resulting in serious leakage and no longer being able to ensure high vacuum.

[0003] Therefore, it is very necessary to provide a sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment, which has the advantages of low cost, stable performance, convenience in use, easy popularization and good sealing effect. Summary of the invention

[0004] The utility model aims to solve the above problems existing in the current technology and proposes a connection and sealing device for a mechanical stirring rod in a high vacuum chemical experiment.

[0005] The technical solution to achieve the purpose of this utility model is:

[0006] The present invention is a sealing device for connecting a mechanical stirring rod for high vacuum chemical experiments, which is composed of a ground glass stirrer sleeve, a latex tube, a red latex cap and a thin iron wire. The device is characterized in that a small length of the latex tube is cut off after the latex tube is inserted into the upper end of the ground glass stirrer sleeve, and then the red latex cap is inserted into the latex tube, and the excess part slightly longer than the latex tube is cut off, the latex tube at the lower end and the rubber cap ring are wrapped with thin iron wire to be tied tightly, and a small amount of lubricating oil is dripped into the rubber cap ring at the upper end.

[0007] The sealing device for connecting a mechanical stirring rod for high vacuum chemical experiments is characterized in that the length of the latex tube at the upper end of the ground glass stirrer sleeve is selected from 0.5 to 1.5 cm.

[0008] The sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment is characterized in that a latex tube and a red latex cap have two rubber rings for sealing.

[0009] The sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment is characterized in that a thin iron wire is wrapped around the latex tube at the lower end and the rubber cap ring to be fastened for fixing.

[0010] The sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment is characterized in that a small amount of lubricating oil is dripped into the upper rubber cap ring to play a role in lubrication and heat dissipation.

[0011] Compared with the prior art, the utility model has a simple and reasonable structure, is easy to implement, has the advantages of raw materials that are common and easily available in the laboratory, low cost, stable performance, convenient use, easy popularization, good sealing effect, etc., and has practical and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The invention discloses a structural schematic diagram of a mechanical stirring rod connection sealing device used in high vacuum chemical experiments.

[0013] In the figure: 1. Ground glass stirrer sleeve; 2. Latex tube; 3. Latex cap ring; 4. Thin iron wire.

[0014] Figure 2 The present invention is a schematic diagram of the operation of a mechanical stirring rod connection sealing device used in high vacuum chemical experiments during reduced pressure distillation. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. These embodiments are merely exemplary and do not constitute any limitation to the scope of the present invention.

[0016] like Figure 1 As shown, a sealing device for connecting a mechanical stirring rod for high vacuum chemical experiments is composed of a ground glass stirrer sleeve, a latex tube, a red latex cap and thin iron wire. After the latex tube is inserted into the upper end of the ground glass stirrer sleeve, 1 cm of the length is cut off. After the red latex cap is inserted into the latex tube, the excess part is cut off at a position 2-5 mm slightly higher than the latex tube. The lower end of the latex tube and the rubber cap ring are tied and fixed with thin iron wire to make the device more secure. 1-2 drops of lubricating oil dripped into the upper end of the rubber cap ring can play a role in lubrication and heat dissipation.

[0017] This mechanical stirring rod is connected to a sealing device and used in high vacuum reduced pressure distillation experiments. After testing, it can achieve the same vacuum degree as the vacuum pump body when stirring for a long time and heating the system at high temperature. It is not easy to deteriorate after repeated use. The raw materials used are common and easy to obtain in the laboratory, low cost, and no wear on the stirring rod. It completely solves the problems of poor sealing of commonly used glass stirring sleeves and high cost and low durability of polytetrafluoroethylene stirring sleeves. It can not only be used for chemical experimental devices under normal pressure conditions, but also perfectly competent for chemical experiments under high vacuum conditions.

[0018] The specific embodiments described herein are merely examples of the spirit of the present invention, but the present application is not limited to the specific details in the above-mentioned implementation modes. Within the technical spirit of the present application, various modifications or supplements or similar replacements may be made to the described specific embodiments, all of which fall within the scope of protection of the present application.

Claims

1. A sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment, which is composed of a ground glass stirring sleeve, a latex tube, a red latex cap and a thin iron wire, and is characterized in that: After the latex tube is inserted into the upper end of the ground glass stirrer sleeve, a small amount of length is cut off, and then a red latex cap is put into the latex tube, and the excess part slightly longer than the latex tube is cut off, the lower end of the latex tube and the rubber cap ring are wrapped with thin iron wire to tie them tightly, and a small amount of lubricating oil is dripped into the upper end of the rubber cap ring.

2. A sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment according to claim 1, characterized in that: The length of the latex tube at the upper end of the ground glass stirrer sleeve is selected from 0.5-1.5 cm.

3. The sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment according to claim 1, characterized in that: The latex tube and the red latex cap are used for sealing.

4. The sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment according to claim 1, characterized in that: Wrap thin iron wire around the lower end latex tube and the rubber cap ring and tie them tightly to secure them.

5. The sealing device for connecting a mechanical stirring rod for a high vacuum chemical experiment according to claim 1, characterized in that: Drop a little lubricating oil into the upper rubber cap ring to lubricate and dissipate heat.

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