CN216440667U - Flask and sampling flask plug thereof - Google Patents

Abstract

The utility model discloses a flask and a sampling flask plug thereof, wherein the sampling flask plug comprises a ring plug, a sampling pipe sleeve and a sampling pipe inserted in the sampling pipe sleeve, the inner wall of the ring plug is provided with internal threads, and the outer wall of the sampling pipe sleeve is provided with external threads matched with the ring plug. The sampling flask plug is inserted into the liquid level through the rotary sampling pipe sleeve to realize liquid seal, can finish sampling from the inside of the flask or feed materials into the inside of the flask by virtue of the sampling pipe, can avoid the change of gas-phase components in the flask and reduce heat loss at the same time, and is suitable for flasks of various models.

Description

Flask and sampling flask plug thereof

Technical Field

The utility model relates to the technical field of chemical experimental equipment, in particular to a sampling flask plug. The utility model also relates to a flask of the sampling flask plug.

Background

In the chemical experiment process using a flask as a reactor, some experiments need to continuously sample for analysis for many times, and some experiments need to add new reactants or catalysts into the reaction flask. Generally, these operations are carried out by opening the stopper of the flask, which causes the escape of the gaseous components in the flask and the entry of the air outside the flask into the flask. On one hand, the gas phase composition in the bottle can be changed, and certain reactant is consumed; on the other hand, oxygen components in the bottle can be increased, the reaction atmosphere is changed, and meanwhile, certain heat loss can be generated, so that the chemical reaction conditions are changed, the reaction process is influenced, and experimental research is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sampling flask plug which can avoid the change of gas-phase components in a flask and reduce heat loss when feeding or sampling and is suitable for various types of flasks. It is another object of the present invention to provide a flask comprising the above sampling flask stopper.

In order to achieve the purpose, the utility model provides a sampling flask plug which comprises a ring plug, a sampling tube sleeve and a sampling tube inserted into the sampling tube sleeve, wherein the inner wall of the ring plug is provided with internal threads, and the outer wall of the sampling tube sleeve is provided with external threads matched with the ring plug.

Optionally, the outer wall of the top end of the ring plug is provided with a first convex limiting ring, and/or the outer wall of the top end of the sampling pipe sleeve is provided with a second convex limiting ring.

Optionally, the inner diameter of the ring plug is 1/5-4/5 of the outer diameter of the ring plug.

Optionally, the length of the internal thread section of the ring plug is 5% -100% of the height of the ring plug.

Optionally, the sampling tube includes a tube body and a rubber head disposed at a second end of the tube body, a sampling hole is disposed at the first end of the tube body, and a sealing plug matched with the sampling tube sleeve is disposed at a peripheral portion of the tube body.

Optionally, the sealing plug is frustoconical.

Optionally, the tube body is provided with graduation marks.

Optionally, the diameter of the sampling pipe sleeve without the external thread section is 1/5-3/5 with the diameter of the external thread section.

The utility model also provides a flask comprising the sampling flask stopper of any one of the above.

Optionally, the flask is a multi-neck flask.

Compared with the background art, the sampling flask plug provided by the utility model can immerse the sampling pipe sleeve below the liquid level to form a liquid seal by rotating the sampling pipe sleeve relative to the ring plug in the chemical reaction process, and then can realize continuous quantitative sampling or feeding by virtue of the sampling pipe, so that gas-phase components in the flask cannot leak out, air outside the flask cannot enter the flask easily, and gas-phase components and atmosphere in the flask are kept from being influenced by continuous sampling or feeding; the flask plug can be matched with flasks of conventional types without changing the bottleneck of the flasks and by means of the ring plug.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of a sampling flask stopper provided in an embodiment of the present invention.

Wherein:

1-ring plug, 2-sampling pipe sleeve and 3-sampling pipe;

11-a first limit ring, 21-a second limit ring, 31-a pipe body, 32-a sealing plug and 33-a rubber head.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic view of a sampling flask plug according to an embodiment of the present invention.

The sampling flask plug provided by the utility model comprises a ring plug 1, a sampling pipe sleeve 2 and a sampling pipe 3, wherein the ring plug 1 is arranged at the bottleneck of the flask, the sampling pipe sleeve 2 is screwed and fixed in the ring plug 1 through matching of internal threads and external threads, the tail end of the sampling pipe sleeve 2 can be immersed in the position below the liquid level in the flask by rotating the sampling pipe sleeve 2, and continuous sampling or feeding can be realized by extending the sampling pipe 3 into the sampling pipe sleeve 2. Even in the chemical reaction process, the gas-phase components in the flask cannot leak out, the air outside the flask cannot easily enter the flask, and the gas-phase components and the atmosphere in the flask are kept from being influenced by continuous sampling or feeding; the flask stopper does not need to change the bottleneck of the flask, and is suitable for common flasks with most conventional models.

In the specific embodiment provided by the utility model, the ring plug 1 can be made of polytetrafluoroethylene or rubber or glass or plastic and other materials. In order to take account of the sealing property of matching with the flask mouth and the convenience of opening the internal thread, the ring plug 1 is preferably made of polytetrafluoroethylene materials. The inner thread is tapped on the preset length section of the inner wall of the ring plug 1, the inner diameter of the ring plug 1 is usually set to be 1/5-4/5 of the outer diameter of the ring plug 1, the length of the inner thread section formed on the ring plug 1 is generally larger than 5% of the height of the ring plug 1, and preferably the length of the inner thread section is equal to the height of the ring plug 1. In order to avoid the problem that the ring plug 1 is difficult to take out due to being embedded into the bottleneck of the flask, the outer wall of the top end of the ring plug 1 is provided with a first limiting ring 11 which protrudes outwards relative to the outer wall of the top end of the ring plug, and the diameter of the first limiting ring 11 is larger than the whole outer diameter of the ring plug 1 and larger than the inner diameter of the bottleneck/bottleneck of the flask, so that the first limiting ring 11 is clamped at the bottleneck of the flask.

The sampling pipe sleeve 2 can adopt a common cylindrical glass pipe or a two-section tubular structure with different diameters. When a two-section tubular structure is adopted, the diameter of the first section is smaller, the first section is used for extending below the liquid level in the flask, and the tail end is provided with a sample introduction small hole; the diameter of the second section is larger, the outer wall of the second section is provided with an external thread which is matched with the internal thread of the ring plug 1 to realize the screwing of the sampling pipe sleeve 2 and the ring plug 1, the length of the sampling pipe sleeve 2 extending into the flask is adjusted, and the small sample injection hole of the sampling pipe sleeve 2 is always ensured to be positioned below the liquid level of the flask to form a liquid seal. When a two-section tubular structure is adopted, the diameter of the first section, namely the diameter of the section without external threads, is 1/5-3/5 of the diameter of the external threads of the second section, and the diameter is specifically the external diameter. The length of the external thread section is 10% -90% of the length of the sampling pipe sleeve 2, and the inner diameter of the external thread section is 1/5-4/5 of the diameter of the external thread. The specific size can be flexibly set according to the experimental sampling or feeding requirement.

Furthermore, the outer wall at the top end of the sampling pipe sleeve 2 is also provided with a second limiting ring 21 which protrudes outwards relative to the outer wall, and the second limiting ring 21 also has a limiting effect, so that the phenomenon that the sampling pipe 3 slides downwards into the flask due to excessive rotation of the external thread and the internal thread section is avoided.

In the above embodiment, the sampling tube 3 is designed as a rubber-tipped dropper, and includes a tube 31 and a rubber head 33 disposed at one end of the tube 31, and the other end is provided with a sampling hole, so that the sampling tube 3 is inserted into the sampling tube sleeve 2, and sampling or feeding is realized by squeezing the rubber head 33. What is different, the sampling tube 3 further comprises a sealing plug 32 sleeved on the periphery of the tube body 31, and the sealing plug 32 plays a role in sealing the sampling tube sleeve 2 on one hand, and plays a role in positioning and fixing the sampling tube 3 on the other hand, so that continuous sampling and feeding are facilitated; in addition, body 31 still sets up the scale mark, improves the accuracy of sample and feeding. The sealing plug 32 can be a round-table-shaped rubber plug, and the inverted round table structure with the diameter gradually increased from the bottom end to the top end prevents the sealing plug 32 from being completely clamped into the sampling pipe sleeve 2.

The operation of continuous sampling during the experiment was: the sampling tube 3 is inserted into the sampling tube sleeve 2 and fixes the sealing plug 32 in place, and is screwed into the ring plug 1 with internal thread through the external thread of the sampling tube sleeve 2 to form the flask plug. The flask plug is arranged in one bottleneck of the flask to be plugged tightly, the sampling pipe sleeve 2 is rotated, the position of the sampling pipe sleeve 2 in the flask is adjusted, a sample introduction pore at the bottom end of the sampling pipe sleeve 2 is immersed below the reaction liquid level, the sealing plug 32 of the sampling pipe 3 is slightly opened, when more reaction liquid enters the sampling pipe sleeve 2 through the sampling pore at the bottom of the sampling pipe sleeve 2, a reaction liquid sample with the required volume is absorbed through the sampling pipe 3, and the steps are repeated to continuously sample.

The operation of feeding in the experimental process is as follows: the sampling tube 3 is inserted into the sampling tube sleeve 2 and is screwed into the ring plug 1 with the internal thread together through the external thread of the sampling tube sleeve 2 to form the flask plug. The flask plug is arranged in one bottleneck of the flask to be plugged tightly, the sampling pipe sleeve 2 is rotated, the position of the sampling pipe sleeve 2 in the flask is adjusted, a sample introduction small hole at the bottom end of the sampling pipe sleeve 2 is immersed below the reaction liquid level, the sealing plug 32 matched with the sampling pipe 3 is opened, and the materials are added into the sampling pipe sleeve 2. If necessary, the sampling tube sleeve 2 can be plugged by a sealing plug 32 arranged at the upper end of the sampling tube 3, and the sampling tube sleeve 2 is pressurized by a rubber head 33 of the sampling tube 3, so that the feeding is accelerated.

The utility model also provides a flask, which is adapted with the sampling flask stopper described in the above embodiment, the flask can be a conventional flask, and only the sampling flask stopper with a proper specification is adapted according to the size of the bottleneck/bottle mouth of the flask, and special processing is not needed to be performed on the bottleneck of the flask, which is of course also applicable to multi-neck flasks, and other parts of the structure of the flask can refer to the existing flask, and details are not repeated in this application.

The sample flask stopper that this application provided and have sample flask stopper have following beneficial effect: the flask does not need to be specially processed, and the sampling flask plug is suitable for any flask with the same diameter as the bottleneck and has wide application range. The sampling tube 3 can be used for continuous quantitative sampling without an additional injector or other driving devices, the gas phase composition and the atmosphere in the flask can be kept relatively stable, and the reaction condition in the flask can not be changed due to the fact that a common flask plug needs to be opened for sampling. The liquid seal of the sampling pipe sleeve 2 can feed materials into the flask without influencing the gas phase components and atmosphere in the flask. The rubber head 33 of the sampling tube 3 can pressurize the interior of the sampling tube sleeve 2, which is beneficial to accelerating feeding. The external diameter of the sampling pipe sleeve 2 without the external thread section is smaller than that of the sampling pipe sleeve with the external thread section, so that the sampling pipe sleeve 2 can be conveniently installed in the ring plug 1. The manufacturing of the above-mentioned flask stopper is simple, and low in production cost, easy and simple to handle easily controls.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The flask and the sampling flask stopper thereof provided by the utility model are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a sample flask stopper, its characterized in that, including ring stopper, sample pipe box and cartridge in the sampling tube box, the inner wall of ring stopper is equipped with the internal thread, the outer wall of sample pipe box be equipped with ring stopper complex external screw thread.

2. A sampling flask stopper according to claim 1, characterized in that the outer wall of the top end of the ring stopper is provided with a first stop ring which is convex outwards, and/or the outer wall of the top end of the sampling tube sleeve is provided with a second stop ring which is convex outwards.

3. The sampling vial stopper of claim 1, wherein the ring plug has an inner diameter that is 1/5-4/5 of the outer diameter of the ring plug.

4. A sampling flask stopper according to claim 1, wherein the length of the internal thread section of the ring stopper is 5% to 100% of the height of the ring stopper.

5. The sampling flask stopper according to any one of claims 1 to 4, wherein the sampling tube comprises a tube body and a rubber head provided at a second end of the tube body, the first end of the tube body is provided with a sampling hole, and the circumference of the tube body is provided with a sealing plug fitted with the sampling tube sleeve.

6. A sampling flask stopper according to claim 5, characterised in that the sealing plug is frustoconical.

7. A sampling flask stopper according to claim 5, wherein the tubular body is provided with graduations.

8. The sampling flask stopper of claim 5, wherein the diameter of the non-externally threaded section of the sampling tube sleeve is 1/5-3/5 of the diameter of the externally threaded section.

9. A flask comprising the sampling flask stopper according to any one of claims 1 to 8.

10. A flask according to claim 9, wherein the flask is a multi-neck flask.

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