CN215353507U

CN215353507U - Chemical glass instrument connecting device

Info

Publication number: CN215353507U
Application number: CN202120432816.7U
Authority: CN
Inventors: 李四中; 刘长胜; 李剑龙; 刘波
Original assignee: Xiamen Deshengming Industrial Co ltd
Current assignee: Xiamen Deshengming Industrial Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-12-31
Anticipated expiration: 2031-02-26

Abstract

The utility model provides a chemical glass instrument connecting device, which is suitable for connecting a glass instrument with an external thread interface, and comprises: the connecting nut is provided with at least two internal thread interfaces, at least one internal thread interface is connected and communicated with the other internal thread interface, a limiting ring is arranged in each internal thread interface, and a layer of sealant is adhered to the surface of the internal thread of each internal thread interface. The connecting device in the technical scheme is simple in integral structure, easy to assemble and disassemble, firm and stable, good in sealing performance and high in practicability.

Description

Chemical glass instrument connecting device

Technical Field

The utility model relates to the technical field of chemical instruments, in particular to a connecting device for a chemical glass instrument.

Background

At present, most of chemical experimental instruments are glass products, and the main reasons are that the glass products have the advantages of high temperature resistance, low expansion coefficient, corrosion resistance, low cost, easy manufacture into complex shapes and the like, so that the glass products can be widely applied to experimental teaching and scientific research production. In the actual construction process of the reaction device, various simpler glass instruments are required to be assembled and connected to further realize the relevant operation of reaction, so that the experiment task can be completed. During the process of assembling the instrument, the basic principle that the device is withdrawn after the experiment is finished, namely from bottom to top and from left to right, is to follow. The device needs to be accurate and correct, and the transverse view is a plane, and the vertical view is a line. If the gas guide is present, the gas tightness must first be checked.

At present, the connection of glass instrument devices is mainly carried out in a mode of using frosted openings or rubber plugs in the chemical experiment process.

The grind on most instruments is a standard grind, except for a few glass instruments (e.g., stopcocks and grinding plugs for separatory funnels, where the grind site is a non-standard grind). Several problems are easily encountered when using standard ground instruments: (1) the surface of the grinding opening must be kept clean, particularly, the grinding opening cannot be stained with solid impurities, otherwise, the grinding opening cannot be tightly connected, and air leakage is caused; (2) after the standard ground instrument is used, the standard ground instrument needs to be immediately disassembled and cleaned, all parts are separately stored, otherwise, the connection part of the ground is bonded and difficult to disassemble, so that the bonded ground instrument is broken in the process of opening, and high risk of injury is caused; (3) when used at atmospheric pressure, the grind is generally free of lubrication to avoid staining the reactants or products. In order to prevent the bonding, a small amount of grease (vaseline, vacuum piston grease or silicone grease) can be coated on the part of the grinding opening close to the large end, but the situation of polluting reactants and products can occur after the grease is coated; (4) the production of the standard ground not only needs special precise ground equipment, but also is not easy to be mastered by production workers and is easy to be damaged when ground; (5) the application scope of mill mouth is comparatively limited, and from the atress angle, the ability that standard mill mouth bore pressure and torsion is all not strong, consequently generally only is applicable to the laboratory glassware of well small dimension, need avoid the shearing force and the torsional force of various perpendicular to sealed face when erectting, also need avoid sealed face because the pulling force of gravity or clip unclamps.

The plug used for connecting the glass instrument mainly comprises a cork plug and a rubber plug, and the selection of the material depends on the property (such as corrosivity, solubility and the like) of the treated object and the application range (such as operation at low temperature, high temperature, normal pressure or reduced pressure) of the instrument. After the plug is selected, a hole is drilled by a drilling machine with a proper hole diameter, and then a glass tube and the like are inserted into the plug hole, so that instruments and the like can be connected. The problems with using plugs as the connection means are: (1) the plug drilling takes time; (2) the inserted glass tube has narrow channel and large fluid resistance in the tube; (3) the joint of the plug is easy to leak, and the plug is easy to corrode, so that the treated object is polluted; (4) in order to ensure air tightness under normal conditions, the diameter of the glass tube is smaller than that of the bottle mouth, the glass tube is easy to break in the inserting process, and high personnel injury risks exist.

In addition, in the process of preparing irritant or toxic gas and liquid, the two traditional connecting modes have leakage risks, great potential safety hazards are caused, and the connecting method is the weakest link of the connecting method of the frosted opening and the rubber plug.

In view of the above, it is necessary to develop a novel chemical glass instrument connection device to promote further simplification and safety of chemical experiments, scientific researches and production.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a connecting device for a chemical glass instrument, which solves the problem of connection between the traditional glass instruments, avoids the problems of liquid leakage, air leakage, sample pollution and the like, simplifies the operation process and reduces the breakage risk of the glass instrument.

In order to solve the above technical problem, the present invention provides a chemical glassware connecting device, which is suitable for connecting a glassware with an external thread interface, and comprises:

the connecting nut is provided with at least two internal thread interfaces, at least one internal thread interface is connected and communicated with the other internal thread interface, a limiting ring is arranged in each internal thread interface, and a layer of sealant is adhered to the surface of the internal thread of each internal thread interface.

Preferably, a sealing gasket is matched at the contact position of the limiting ring and the external thread interface of the glass instrument.

Preferably, the sealing washer is made of a high polymer material, and the high polymer material is selected from nitrile rubber, fluororubber, silicone rubber, ethylene propylene rubber, epichlorohydrin rubber, polyurethane, polytetrafluoroethylene, fluorinated ethylene propylene, polyvinylidene fluoride, tetrafluoroethylene, ethylene copolymer, polyethylene or nylon.

Preferably, the glass apparatus is selected from a flask, a conical flask, a wash bottle, a reagent bottle, a filter flask, a fractionating tube, a condenser tube, a connecting tube, a conduit, a receiving tube, a ox horn tube, a test tube, a centrifuge tube, a filter tube, a burette, a separating funnel, a dropping funnel, a glass funnel, a fractionating column, a fractionating head or a distilling head.

Preferably, the connecting nut is made of a high polymer material, and the high polymer material is selected from polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, natural rubber, nitrile rubber, styrene butadiene rubber, fluororubber, silicone rubber or polyurethane.

Preferably, the sealant is made of natural rubber, nitrile rubber, styrene butadiene rubber, fluororubber, silicone rubber or polyurethane.

Preferably, the connecting nut comprises two internal thread interfaces, the internal diameters of the internal thread interfaces are the same, and the external thread interfaces of the glass instruments connected with the connecting nut have the same caliber.

Preferably, the connecting nut comprises at least two internal thread interfaces, the internal diameters of the internal thread interfaces are different, and the external thread interfaces of the glass instruments connected with the connecting nut have calibers with different sizes.

Preferably, the coupling nut further comprises a non-threaded interface.

Preferably, the sealant has elasticity and is adhered to the internal thread of the internal thread interface in an embedding and/or bonding mode.

Preferably, the internal threads of the female threaded interface are screwed in the same direction or in opposite directions.

Compared with the prior art, the technical scheme of the utility model has the following beneficial effects: the utility model greatly improves the disassembly and assembly simplicity of the glass instrument, simultaneously realizes the protection and sealing of the threaded interface of the glass instrument through the limiting ring and the sealing washer in the connecting nut, and the sealant adhered to the surface of the internal thread ensures the tight connection between threads through deformation filling; the reaction instrument is conveniently, quickly, efficiently and safely assembled by a teacher in the teaching process, so that the classroom experiment can be smoothly completed, and the safety and feasibility of students in the experiment process can be improved, and the teaching effect can be improved.

Drawings

FIG. 1 is a schematic view of a coupling nut of a first embodiment of the present invention coupled to a glassware apparatus;

FIG. 2 is a schematic view of a second embodiment of the coupling nut of the present invention coupled to a glassware apparatus;

FIG. 3 is a schematic view of a third embodiment of the coupling nut of the present invention coupled to a glassware apparatus;

FIG. 4 is a schematic view of a coupling nut of a fourth embodiment of the present invention coupled to a glassware apparatus;

FIG. 5 is a schematic view of a fifth embodiment of the coupling nut of the present invention in connection with a glassware apparatus.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below", and other directional terms, will be understood to have their normal meaning and refer to those directions as they normally relate to when viewing the drawings. Unless otherwise indicated, the directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.

Referring to fig. 1 to 5, a chemical glass instrument connection device 100 is suitable for connecting a glass instrument 200 with an external thread interface 210, the chemical glass instrument connection device 100 includes a connection nut 1, the connection nut 1 has at least two internal thread interfaces 11, at least one internal thread interface 11 is connected and communicated to another internal thread interface 11, a limiting ring 12 is arranged in the internal thread interface 11, and a layer of sealant 13 is adhered to the surface of an internal thread 111 of each internal thread interface 11.

The external threaded interface 210 of the glass instrument 200 can be attached to a conventional glass instrument 200 or integrally formed during the manufacturing process of the glass instrument 200. Glass instrument 200 can be for ordinary soda-lime-silica glass, sodium borosilicate glass, lead oxide glass, aluminosilicate glass etc. arbitrary suitable glass that can be used for making glass instrument 200, glass instrument 200 can be for the arbitrary glass instrument 200 that needs to connect, assemble, perhaps sealed chemical test usefulness, glass instrument 200 include but not only be limited to flask, erlenmeyer flask, wash bottle, reagent bottle, filter flask, fractionating tube, condenser pipe, connecting pipe, receiver tube, ox horn pipe, test tube, centrifuging tube, filter tube, buret, separating funnel, dropping funnel, glass funnel, fractionating column, fractionating head, distillation head etc. arbitrary suitable conventional chemical glass instrument, it all can adopt connecting device 100 connects.

Spacing collar 12 can play limiting displacement to the installation of glassware 200, and the contact position cooperation of spacing collar 12 and glassware 200's external screw thread interface 210 has seal ring 14, seal ring 14 can prevent glassware 200's external screw thread interface 210 and spacing collar 12 rigid collision to lead to external screw thread interface 210 to damage, in this embodiment, seal ring 14 can be nitrile rubber, fluorine rubber, silicon rubber, EP rubbers, chlorohydrin rubber, elastomer materials such as polyurethane, also can be fluoroplastics such as polytetrafluoroethylene, fluorinated ethylene propylene, polyvinylidene fluoride, tetrafluoroethylene and ethylene copolymer, also can be plastics such as polyethylene, nylon, as long as can prevent external screw thread interface 210 and spacing collar 12 rigid collision can.

The sealant 13 can fill a gap between the external thread interface 210 of the glass instrument 200 and the internal thread interface 11 of the coupling nut 1, so as to realize tight connection of the threaded part, and avoid the problem of reactant and product pollution caused by using common grease (vaseline, vacuum piston grease or silicone grease) of the glass instrument 200. The sealant 13 has elasticity and is adhered to the internal thread 111 of the internal thread joint 11 in an embedding and/or bonding manner. In this embodiment, the sealant 13 is made of natural rubber, nitrile rubber, styrene butadiene rubber, fluorine rubber, silicone rubber, or polyurethane.

Referring to fig. 1, a first embodiment of the present invention is shown, in this embodiment, the coupling nut 1 includes a hollow straight sleeve 16, two ends of the straight sleeve 16 respectively face to upper and lower sides, an annular convex wall 161 radially extends inward from an inner wall of the straight sleeve 16, the upper and lower sides of the inner wall of the straight sleeve 16 are respectively provided with an internal thread 111 and respectively define two internal thread interfaces 11, and a layer of sealant 13 is respectively adhered to surfaces of the internal thread 111 of the internal thread interfaces 11. The upper surface and the lower surface of the annular convex wall 161 respectively define two limiting rings 12 of the internal thread interface 11, and the upper side and the lower side of the annular convex wall 161 are respectively provided with a sealing gasket 14.

Therefore, in this embodiment, the coupling nut 1 is provided with two female screw interfaces 11, the inner diameters of the female screw interfaces 11 are the same, and the male screw interfaces 210 of the glass instruments 200 connected by the coupling nut 1 have the same caliber. The screwing directions of the internal threads 111 of the internal thread interface 11 are the same or opposite, and the external thread screwing direction of the external thread interface 210 of the glass instrument 200 is matched with the internal thread interface 11.

Referring to fig. 2, a second embodiment of the present invention is shown, in this embodiment, the coupling nut 1 is formed by connecting two annular surrounding walls 17 with different diameters, the diameter of the annular surrounding wall 17 located at the upper side is smaller, the diameter of the annular surrounding wall 17 located at the lower side is larger, the annular surrounding walls 17 are respectively provided with internal threads 111 and respectively define the internal thread joints 11, and a layer of sealant 13 is respectively adhered to the surfaces of the internal threads 111 of the internal thread joints 11.

An annular protrusion 171 extends radially inwards at the joint of the annular surrounding wall 17, the upper surface and the lower surface of the annular protrusion 171 respectively define two limiting rings 12 of the internal thread connector 11, and the upper side and the lower side of the annular protruding wall 161 are respectively provided with a sealing gasket 14.

Therefore, in this embodiment, the connection nut 1 is provided with two female screw interfaces 11, the inner diameters of the female screw interfaces 11 are different, and the male screw interfaces 210 of the glass instruments 200 connected by the connection nut 1 have different calibers. The screwing directions of the internal threads 111 of the internal thread interface 11 are the same or opposite, and the external thread screwing direction of the external thread interface 210 of the glass instrument 200 is matched with the internal thread interface 11.

Referring to fig. 3, a third embodiment of the present invention is shown, in this embodiment, the coupling nut 1 includes a first sleeve 18 and a second sleeve 19, an opening of the first sleeve 18 faces downward, an opening of the second sleeve 19 faces upward, the second sleeve 19 passes through a top wall of the first sleeve 18, a protruding ring 191 extends radially inward from a lower end of the second sleeve 19, inner walls of the first sleeve 18 and the second sleeve 19 are respectively provided with an internal thread 111 and respectively define the internal thread interface 11, the top wall of the first sleeve 18 and the protruding ring 191 of the second sleeve 19 define the limiting ring 12, and a layer of sealant 13 is respectively adhered to surfaces of the internal threads 111 of the internal thread interface 11. The top wall of the first sleeve 18 is also provided with a sealing gasket 14.

In this embodiment, the upper glass instrument 200 is a glass guide tube which extends through the second sleeve 19, and there is no contact position of the external threaded interface of the glass instrument with the stop collar, and therefore no sealing washer 14 is fitted. Therefore, the third embodiment is the same as the second embodiment, the coupling nut 1 includes two female screw interfaces 11, the inner diameters of the female screw interfaces 11 are different, and the male screw interfaces 210 of the glass instruments 200 connected by the coupling nut 1 have different calibers.

In this embodiment, the internal threads 111 of the internal threaded interface 11 are screwed in the same direction or in opposite directions, and the external thread of the external threaded interface 210 of the glass instrument 200 is screwed in the same direction as the internal threaded interface 11.

Referring to fig. 4, a fourth embodiment of the present invention is shown, in which on the basis of the third embodiment, the coupling nut 1 further includes a third sleeve 20, a protruding ring 191 is also disposed at a lower end of the third sleeve 20, the protruding ring 191 defines a stop collar 12, an internal thread 111 is disposed in the third sleeve 20 and defines an internal thread interface 11, and a layer of sealant 13 is adhered to a surface of the internal thread 111 of the internal thread interface 11.

Therefore, in this embodiment, the connection nut 1 includes three female connectors 11, the inner diameters of the female connectors 11 are different, and the male connectors 210 of the glass instruments 200 connected by the connection nut 1 have different calibers.

Referring to fig. 5, showing a fifth embodiment of the present invention, the coupling nut 1 further comprises a non-threaded interface 15, wherein the non-threaded interface 15 is adapted to be coupled to a glass conduit having a surface that is not externally threaded. The non-threaded interface 15 can be connected with the glass instrument 200 of other non-threaded interfaces 15, so that a three-way/multi-way effect is achieved, better adaptability is achieved, and multiple requirements of chemical experiments are met.

The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art can make insubstantial changes in the technical scope of the present invention within the technical scope of the present invention, and the actions infringe the protection scope of the present invention are included in the present invention.

Claims

1. A chemical glassware connecting device is applicable to the connection of glassware who has external screw thread interface, its characterized in that includes:

the connecting nut is provided with at least two internal thread interfaces, at least one internal thread interface is connected and communicated with the other internal thread interface, and a layer of sealant is adhered to the surface of the internal thread of each internal thread interface.

2. A chemical glass instrument connection device according to claim 1, wherein: a limiting ring is arranged in the internal thread interface, and a sealing washer is matched with the contact position of the limiting ring and the external thread interface of the glass instrument.

3. A chemical glass instrument connection device according to claim 2, wherein: the sealing washer is made of a high polymer material, and the high polymer material is selected from nitrile rubber, fluororubber, silicone rubber, ethylene propylene rubber, chlorohydrin rubber, polyurethane, polytetrafluoroethylene, polyfluorinated ethylene propylene, polyvinylidene fluoride, tetrafluoroethylene, ethylene copolymer, polyethylene or nylon.

4. A chemical glass instrument connection device according to claim 1, wherein: the connecting nut is made of high polymer materials, and the high polymer materials are selected from polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, natural rubber, nitrile rubber, styrene butadiene rubber, fluororubber, silicon rubber or polyurethane.

5. A chemical glass instrument connection device according to claim 1, wherein: the sealant is prepared from natural rubber, nitrile rubber, styrene butadiene rubber, fluororubber, silicon rubber or polyurethane.

6. A chemical glass instrument connection according to any one of claims 1 to 5, wherein: the connecting nut comprises two internal thread interfaces, the internal diameters of the internal thread interfaces are the same, and the external thread interfaces of the glass instruments connected with the connecting nut have the same caliber.

7. A chemical glass instrument connection according to any one of claims 1 to 5, wherein: the connecting nut comprises at least two internal thread interfaces, the internal diameters of the internal thread interfaces are different, and external thread interfaces of glass instruments connected with the connecting nut have calibers with different sizes.

8. A chemical glass instrument connection according to any one of claims 1 to 5, wherein: the coupling nut further includes a non-threaded interface.

9. A chemical glass instrument connection according to any one of claims 1 to 5, wherein: the sealant has elasticity and is adhered to the internal thread of the internal thread interface in an embedding and/or bonding mode.

10. A chemical glass instrument connection according to any one of claims 1 to 5, wherein: the internal thread of the internal thread interface rotates in the same direction or in the opposite direction.