CN212732199U

CN212732199U - Volumetric flask bottleneck seal assembly

Info

Publication number: CN212732199U
Application number: CN202021253744.1U
Authority: CN
Inventors: 王汝英; 沈青
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-03-19
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a volumetric flask bottleneck seal assembly belongs to chemistry and detects technical field. The assembly is comprised of an extruded fastener, a tightening ring and a top cover. The part of the bottom of the top cover, which is used for being connected with the capacity bottle head, is provided with a concave cavity. A plurality of gaps connected with the extrusion fastening piece are uniformly distributed on the annular side wall of the concave cavity along the circumference. A plurality of sliding grooves are uniformly distributed on the outer circumferential surface of the top cover along the circumference. The inside of the tightening ring is provided with a limiting edge matched with the sliding groove, so that the tightening ring can move along the sliding groove. The upper part of the extrusion fastener is provided with a convex connecting ring along the radial direction, and the lower part of the extrusion fastener is a conical main body which is fixedly connected with the bottom of the connecting ring and is provided with a hollow cavity. The conical main body is made of flexible materials and sleeved outside the capacity bottle head in a clearance mode, and can be extruded by the tightening ring on the outer side of the conical main body to be fixed with the capacity bottle head into a whole. The bottom of the extrusion fastener of the assembly is of a conical structure made of flexible materials, and the assembly can be squeezed and tightened by a tightening ring to realize sealing and fixing and is not easy to damage.

Description

Volumetric flask bottleneck seal assembly

Technical Field

The utility model relates to a volumetric flask bottleneck seal assembly belongs to chemistry and detects technical field.

Background

Volumetric flasks are one of the most common vessels in chemical experiments, and are mainly used for calibrating various standard solutions. The prior conventional volumetric flasks are mainly of pear-shaped narrow-diameter type (as shown in fig. 1). The volumetric flask is mainly composed of a pear-shaped flask body 13 for containing solution and an elongated neck 12. A conical bottle head 11 is generally arranged on the upper part of a bottle neck 12, a bottle cap with a round handle is inserted into the bottle head, and a fixed calibration line 14 is arranged in the middle of the bottle neck. Because the calibration solution can be any pH value and component, most of the existing volumetric flasks are made of corrosion-resistant and easily observable glass materials. In addition to being fragile, the most common problem encountered during the use of volumetric flasks is the bottleneck-stopper seal during constant volume blending.

Generally, the inner wall of the bottle body of the volumetric bottle is an inner conical surface with a wide upper part and a narrow lower part, the surface of the inner conical surface is frosted, and the external shape of the bottle stopper is just matched with the inner wall of the bottle head. However, in the using process, due to repeated torsional friction, the outer peripheral surface of the bottle plug and the inner conical surface of the bottle head are not matched with each other more and more, and the problem of liquid leakage often occurs. In order to seal and facilitate plugging, experimenters often solve the sealing problem by coating Vaseline on the peripheral surface of the bottle stopper. On the one hand, however, vaseline pollutes the calibration solution in the mixing process, and the purity and the concentration of the solution are influenced; on the other hand, when the abrasion is serious or the bottle stopper is not matched, the leakage problem cannot be fundamentally solved. Meanwhile, the bottle stopper is separated from the bottle body, so that confusion is easily caused by poor management during use, and the one-to-one correspondence of original accessories cannot be realized. Although the outer diameters of the capacity bottle heads are generally uniform, the inner diameters of the capacity bottle heads have larger difference, and the liquid leakage problem generally occurs in non-original bottle stoppers.

For solving the problem that the bottle head of the volumetric flask leaks liquid and the bottle plug is easy to lose and mix, the prior art personnel provide a plurality of solutions. For example, prior patent CN 208990830U discloses a laboratory volumetric flask with good sealing, which comprises a protective sleeve fixedly connected to the side wall of the thin neck part, besides having a pear-shaped bottom and a thin neck part, and the protective sleeve comprises a protective part and a guide part. This volumetric flask has included a plurality of parts such as solid fixed ring, a plurality of deflector, direction spout, spacing picture peg, has the too complicated problem of structure. For another example, prior art CN 205574582U discloses a volumetric flask with high sealing performance, which includes a flask body and a sealing cap, wherein the sealing cap includes a flask plug, an outer sleeve body sleeved on the outer end of the flask plug, and a threaded portion is provided on the flask plug. The opening of the upper end of the bottle body is provided with a circle of butt joint flange which protrudes outwards, and the upper surface of the butt joint flange is provided with four loosening rubber bodies. The bottle plug is connected with the inner wall of the bottle head through a threaded part. Although this volumetric flask simple structure, sealed effect is better, nevertheless because the volumetric flask adopts the glass material for the overwhelming majority, and bottle head is often thinner, adopts threaded connection very easy to damage. For another example, prior art CN104210742B discloses a cap for sealing a glass capacity neck finish. This lid includes integrated connection's caping, gai bi and buckle, and the gai bi is the pipe form with the perpendicular connection of lid, and the buckle is the angular form arch that sets up on the inner wall bottom edge of gai bi. The cap has the advantages of simple structure, convenience in operation and the like, but the acting force which forms a certain included angle with the axial direction of the bottleneck can be generated when the cap is installed and detached, so that the capacity bottle body is often crisp, the structural strength is low, and the bottleneck is easily broken by the user without paying attention.

SUMMERY OF THE UTILITY MODEL

For solving the problem that the bottle plug of the bottle head of the prior volumetric flask is easy to leak liquid and has a complex and easily damaged sealing structure, the utility model provides a volumetric flask bottleneck sealing assembly, the technical scheme who takes as follows:

a volumetric flask bottleneck seal assembly, this seal assembly is made up of squeezing the fastener 2, tightening ring 3 and top cap 4; the top cover 4 is of a cylindrical structure, and a concave cavity is formed in the position, used for being connected with the bottle head of the volumetric flask, of the bottom of the top cover; the top surface of the concave cavity is a sealing surface 45, and a plurality of gaps 43 connected with the extrusion fastening piece 2 are uniformly distributed on the annular side wall of the concave cavity along the circumference; a plurality of sliding grooves 42 are uniformly distributed on the outer circumferential surface of the top cover 4 along the circumference; a limiting edge 32 matched with the sliding groove 42 is arranged inside the tightening ring 3, the tightening ring 3 can move along the sliding groove 42, and the tightening ring is separated from the sliding groove 42 and fixed at the bottom of the top cover 4 through rotary clamping; the upper part of the extrusion fastener 2 is provided with a connecting ring 22 with a bulge 23 along the radial direction, and the lower part is provided with a conical main body 21 which is fixedly connected with the bottom of the connecting ring 22 and is provided with a hollow cavity; the conical main body 21 is made of flexible materials and is sleeved outside the volumetric flask head in a clearance mode, and the tightening ring 3 outside the conical main body can be extruded to be fixed with the volumetric flask head into a whole.

Preferably, the sealing surface 45 of the lid 4 is integral with the annular side wall of the concave cavity by means of a concave upper curved surface 44.

More preferably, the upper part of the inner wall of the conical main body 21 of the compression fastener 2 is provided with a concave lower curved surface 24; the lower curved surface 24 and the upper curved surface 44 enclose the outer side of the outer convex bottle head ring at the top end of the bottle head.

Preferably, the inner edge line of the bottom surface of the tightening ring 3 and the inner edge line and the bottom edge line of the limit edge 32 press the tapered main body 21 of the compression fastener 2; the inner edge line of the bottom surface of the tightening ring 3 and the inner edge line and the bottom edge line of the limiting edge 32 are processed by round corners.

Preferably, the connection ring 22 is made of a hard material and has an inner diameter not smaller than the maximum outer diameter of the tip ring 15 at the tip of the tip 11.

More preferably, the tapered body 21 has an inner diameter no smaller than the smallest outer diameter of the tip ring 15 at the tip of the tip 11.

More preferably, the tapered body 21 has an inner diameter equal to the smallest outer diameter of the tip ring 15 at the top of the tip 11.

Preferably, the axial length of the tightening ring 3 is not less than the axial length of the conical body 21.

Preferably, the sealing surface 45 and the upper curved surface 44 are made of glass.

Compared with the prior art, the utility model discloses the beneficial effect who obtains is:

the utility model provides a seal assembly simple structure only comprises top cap, tightening ring and the three part of extrusion fastener. The bottom of the extrusion fastener is made of a flexible material into a conical structure with a narrow top and a wide bottom, and the bottle head can be tightly sealed and fixed by extruding and tightening the tightening ring. During operation, only rotation or axial drawing operation along the bottleneck is needed, and the bottleneck bottle head is not easy to damage.

The sealing surface on the inner side of the top cover of the assembly is made of glass, so that the corrosion of various corrosive materials to other materials can be effectively prevented, and the service life is prolonged. Meanwhile, the assembly is simple to operate and convenient to use, and sealing and fixing can be achieved only by buckling the pull-down torsion during use.

Drawings

Fig. 1 is a front view of a conventional volumetric flask (not including a stopper).

Fig. 2 is a front view of a volumetric flask using a sealing assembly according to a preferred embodiment of the present invention.

Fig. 3 is a schematic perspective view of a sealing assembly at a sealing position of a bottle mouth of a volumetric flask according to a preferred embodiment of the present invention.

Fig. 4 is a schematic diagram of the exploded structure of fig. 3.

Fig. 5 is a perspective view of a compression fastener of a preferred embodiment seal assembly according to the present invention.

Fig. 6 is a schematic top view of the structure of fig. 5.

Fig. 7 is a schematic perspective view of a top cap of a sealing assembly according to a preferred embodiment of the present invention.

Wherein, 1, a volumetric flask; 2, extruding the fastener; 3, tightening the ring; 4, a top cover; 11, bottle head; 12, a bottle neck; 13, a bottle body; 14, calibrating a line; 15, a bottle head ring; 21, a conical body; 22, a connecting ring; 23, a bump; 24, a lower curved surface; 31, a ring body; 32, limiting edges; 41, a cover body; 42, a chute; 43, a notch; 44, an upper curved surface; 45, sealing surface.

Detailed Description

In the following description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and "upright" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the following description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection may be direct or indirect via an intermediate medium, or the connection may be internal to both components. To those of ordinary skill in the art, the specific meaning of the written terms in the present invention can be understood as a specific case.

In addition, in the following description of the present invention, the meaning of "a plurality", and "a plurality" is two or more unless otherwise specified.

The materials, reagents, devices, apparatuses, methods and processes used in the following examples are not specifically described, and are all materials, reagents, devices, apparatuses, methods and processes which are common in the art, and are commercially available to those skilled in the art or can be routinely set up according to specific needs without any creative effort.

The present invention will be described in further detail with reference to the accompanying drawings, but the present invention is not limited by the following detailed description.

Fig. 2 is a front view of a volumetric flask using a sealing assembly according to a preferred embodiment of the present invention. As can be seen in fig. 2, in the preferred embodiment, the assembly includes a compression fastener 2 mounted on top of the crown 11 of the volumetric flask 1, a tightening ring 3 and a top cover 4. Wherein the top cover 4 is positioned on the upper portion of the compression fastener 2 and the tightening ring 3 is positioned on the circumferential outer side of the top cover 4 and the compression fastener 2. Meanwhile, it can be seen that the bottle head 11 of the volumetric flask 1 is in a tapered structure with a wide top and a narrow bottom, and the bottom of the extrusion fastener 2 is in a tapered structure with a narrow top and a wide bottom.

Fig. 3 is a schematic perspective view of a sealing assembly at a sealing position of a bottle mouth of a volumetric flask according to a preferred embodiment of the present invention. Fig. 4 is a schematic diagram of the exploded structure of fig. 3. As can be seen in fig. 3 and 4, in the preferred embodiment, the compression fastener 2 includes a lower conical body 21 and an upper connecting ring 22. Three protrusions 23 (two are shown) protruding radially outward are provided on the outer circumference of the connection ring 22, and the protrusions 23 are uniformly distributed in the circumferential direction. The ring body 31 of the tightening ring 3 is a circular ring structure, and three limiting edges 32 are uniformly distributed on the inner circumference of the ring body. The top cover 4 is a cylindrical structure having an outer diameter equal to the inner diameter of the ring body 31. Three sliding grooves 42 corresponding to the position of the limiting ribs 32 are uniformly distributed on the circumferential surface of the tightening ring 3, so that the tightening ring can move along the axial direction. Meanwhile, three notches 43 are uniformly distributed in the circumferential direction of the bottom edge of the top cover 4, the notches 43 are of a structure with a small opening and a large inner part, and the structure can be just connected with the protrusion 23. The protrusion 23 can be inserted into the notch 43 and then rotated to be fixed in the notch 43.

Fig. 5 is a perspective view of a compression fastener of a preferred embodiment seal assembly according to the present invention. Fig. 6 is a schematic top view of the structure of fig. 5. As can be seen from fig. 5 and 6, in the preferred embodiment, the inner diameter of the connecting ring 22 of the squeeze fastener 2 is equal to the maximum outer diameter of the bottleneck ring 15 so as to be easily fitted over the bottleneck 11. The connecting ring 22 is made of hard material for connecting with the top cover 4. The conical body 21 located at the lower part of the connection ring 22 is made of flexible material because it needs to be pressed and deformed to perform a sealing and fixing function. The top of the conical body 21 is a concave lower curved surface 24 to fit the bottom of the tip ring 15. Meanwhile, the overall thickness of the tapered body 21 is much greater than the gap between its inner diameter and the outer peripheral surface of the tip 11.

Fig. 7 is a schematic perspective view of a top cap of a sealing assembly according to a preferred embodiment of the present invention. As can be seen from fig. 7, in the preferred embodiment, the upper surface of the lower concave cavity of the top cap 4 for connecting with the top of the bottle head 11 is a sealing surface 45, and the material is preferably glass with better corrosion resistance. Similarly, the concave upper curved surface 44, which is integrally connected to the annular side wall of the concave cavity at the sealing surface 45, is preferably made of glass. Thus, during installation, the sealing surface 45 and the upper curved surface 44 directly engage the top surface of the finish 11 and the upper curved surface of the finish ring 15. Meanwhile, the sliding groove 42 and the notch 43 are arranged at intervals to avoid interference. The upper part of the sliding groove 42 is sealed to prevent the tightening ring 3 from slipping off, and the bottom part is opened to enable the tightening ring 3 to be fixed on the lower surface of the annular wall of the concave cavity by rotating the top part of the spacing rib 32 without round angle processing after being pulled out of the sliding groove 42.

The use process and principle of the assembly are as follows: when sealing is needed, the limiting edge 32 of the tightening ring 3 is inserted into the sliding groove 43 and is tightened at the top, and then the connecting ring 22 of the extrusion fastener 2 is connected with the gap of the top cover. Then the assembly is buckled on the top of the volumetric flask head 11, and the assembly can be sleeved on the flask head 11 by slightly applying force because the conical main body 21 is made of flexible material. Then, the tightening ring 3 is pulled down to separate the top of the limiting rib 32 from the sliding groove 42, and finally, the tightening ring 3 is rotated to clamp the top of the limiting rib 32 at the bottom of the top cover 4. During the pull-down of the tightening ring 3, the tightening ring 3 gradually compresses the conical body 21. The clearance between the conical main body 21 and the outer peripheral surface of the bottle head 11 is gradually reduced and finally extruded and tightened, and when the tightening ring 3 is pulled to the lowest position, the conical main body 21 is compressed and compacted and is fixed after rotation. When loosening is required, the tightening ring 3 is twisted to enable the limiting ribs 32 to enter the sliding grooves 42 and be pulled backwards, and the assembly can be taken down after the conical main body 21 is loosened. The component is simple in structure and convenient to use, can realize sealing of the bottle head and the bottle plug, and can avoid damage to the volumetric flask to the maximum extent.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A volumetric flask bottleneck seal assembly is characterized by comprising an extrusion fastener (2), a tightening ring (3) and a top cover (4); the top cover (4) is of a cylindrical structure, and a concave cavity is formed in the position, used for being connected with the bottle head of the volumetric flask, of the bottom of the top cover; the top surface of the concave cavity is a sealing surface (45), and a plurality of gaps (43) connected with the extrusion fastening piece (2) are uniformly distributed on the annular side wall of the concave cavity along the circumference; a plurality of sliding grooves (42) are uniformly distributed on the outer circumferential surface of the top cover (4) along the circumference; a limiting edge (32) matched with the sliding groove (42) is arranged in the tightening ring (3), the tightening ring (3) can move along the sliding groove (42) and is separated from the sliding groove (42) and fixed at the bottom of the top cover (4) through rotary clamping; the upper part of the extrusion fastener (2) is provided with a connecting ring (22) with a bulge (23) along the radial direction, and the lower part is a conical main body (21) which is fixedly connected with the bottom of the connecting ring (22) and is provided with a hollow cavity; the conical main body (21) is made of flexible materials and is sleeved outside the bottle head of the volumetric flask in a clearance mode, and the conical main body can be extruded by the tightening ring (3) on the outer side of the conical main body to be fixed with the bottle head of the volumetric flask into a whole.

2. The closure assembly according to claim 1, characterized in that the sealing surface (45) of the top cap (4) is integrated with the annular side wall of the concave cavity by means of a concave upper curved surface (44).

3. The sealing assembly of the bottle mouth of the volumetric flask according to claim 2, characterized in that the upper part of the inner wall of the conical main body (21) of the extrusion fastener (2) is provided with a concave lower curved surface (24); the lower curved surface (24) and the upper curved surface (44) enclose the outer side of the convex bottle head ring at the top end of the bottle head.

4. The volumetric flask mouth seal assembly according to claim 1, characterized in that the inner edge line of the bottom surface of the tightening ring (3) and the inner edge line and the bottom edge line of the stop rib (32) squeeze the conical body (21) of the squeeze fastener (2); the inner edge of the bottom surface of the tightening ring (3) and the inner edge and the bottom edge of the limiting edge (32) are processed by round corners.

5. The sealing assembly of the bottle mouth of the volumetric flask according to claim 1, characterized in that the connecting ring (22) is made of hard material and has an inner diameter not smaller than the maximum outer diameter of the bottle head ring (15) at the top end of the bottle head (11).

6. The closure assembly according to claim 5, characterized in that the inner diameter of the conical body (21) is not smaller than the smallest outer diameter of the ring (15) at the top of the bottle head (11).

7. The closure assembly according to claim 6, characterized in that the conical body (21) has an internal diameter equal to the minimum external diameter of the top ring (15) of the bottle head (11).

8. The volumetric flask mouth seal assembly according to claim 1, characterized in that the axial length of the tightening ring (3) is not less than the axial length of the conical body (21).

9. The closure assembly according to claim 1, characterized in that the sealing surface (45) and the upper curved surface (44) are made of glass.