CN212580551U - Volumetric flask bottleneck sealing device - Google Patents

Abstract

The utility model discloses a volumetric flask bottleneck sealing device belongs to chemistry and detects technical field. The device comprises an extrusion fastener, a tightening ring, a top cover and a bottom cover, wherein the top cover and the bottom cover are movably and detachably connected through a notch-lug matching to enable the top cover and the bottom cover to be connected into a whole, and a cavity for accommodating the extrusion fastener and the tightening ring is formed. The upper part of the extrusion fastener is connected with the top cover, the bottom of the extrusion fastener is a conical main body made of flexible materials, and the tightening ring is connected with the top cover in a matched mode through a slide rail-convex edge and can extrude the conical main body on the lower part of the tightening ring, so that the sealing device is integrally fixed on the head of the volumetric flask. The device has the advantages of simple structure, convenient operation, difficult damage to the volumetric flask and the like.

Description

Volumetric flask bottleneck sealing device

Technical Field

The utility model relates to a volumetric flask bottleneck sealing device 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 sealing device for the bottleneck of the volumetric flask, the technical scheme who takes is as follows:

a volumetric flask bottleneck sealing device, this including squeezing the fastener 2, tightening ring 3, top cap 4 and bottom cap 5; 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, and a plurality of convex blocks 46 extending along the radial direction are arranged on the upper part of the top cover 4; 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 the tightening ring is fixed at the bottom of the top cover 4 through rotary clamping after the sliding groove 42 is separated; a plurality of arc parts 33 extending along the axial direction of the tightening ring 3 are uniformly distributed on the upper surface of the tightening ring 3 along the circumferential direction; 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, is sleeved outside the volumetric flask head in a clearance mode, and can be extruded by the tightening ring 3 on the outer side of the conical main body to be fixed with the volumetric flask head into a whole; the bottom cover 5 comprises a cylindrical bottom cover body 51, a top cover fixing notch 52 is arranged at the top of the bottom cover body 51, and an inner ring 53 extending inwards in the radial direction is arranged at the bottom of the bottom cover body 51; the inner diameter of the inner ring 53 is not less than the maximum outer diameter of the volumetric flask head ring; the top cover fixing notch 52 is matched and connected with the lug 46 of the top cover 4.

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 inner diameter of the connection ring 22 is not smaller than the maximum outer diameter of the tip ring 15 at the tip of the tip 11.

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 ring body 31 of the tightening ring 3 has an axial length not less than the axial length of the conical body 21; the length of the arcuate portion 33 is not less than 1.5 times the axial length of the conical body 21.

Preferably, the width of the arc-shaped gap between adjacent arc-shaped portions 33 is greater than the width of the projection 46.

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 sealing device simple structure only comprises four parts of top cap, tightening ring, extrusion fastener and bottom. 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.

The device of the utility model is provided with the bottom cover, the bottom cover and the top cover are connected in a detachable way through the matching rotation of the notch and the lug, the integrity of the device is enhanced during the use, and the use is more convenient. Simultaneously, the inner ring of bottom can effectively block that the interior ring of tightening ring pull-down in-process leads to extrusion fastener's toper main part to take place deformation downwards because of the extrusion, is favorable to increasing sealed leakproofness and fixed stability. Meanwhile, the tightening ring is provided with an arc-shaped part extending upwards, and the arc-shaped part can be used as a force application part for pulling the tightening ring downwards and upwards and rotating the tightening ring, so that the operation is convenient.

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 the sealing device of a preferred embodiment of the present invention.

Fig. 3 is a schematic perspective view of a sealing device at the sealing position of the mouth of the volumetric flask according to a preferred embodiment of the present invention (with the body and part of the neck hidden).

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

Fig. 5 is a schematic perspective view of a compression fastener of a sealing device according to a preferred embodiment of 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 device according to a preferred embodiment of the present invention.

Fig. 8 is a schematic perspective view of a bottom cover of a sealing device 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; 5, a bottom 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; 33, an arc-shaped portion; 41, a cover body; 42, a chute; 43, a notch; 44, an upper curved surface; 45, a sealing surface; 46, a bump; 51, a bottom cover body; 52, fixing a gap on the top cover; 53, inner ring.

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 the sealing device of a preferred embodiment of the present invention. As can be seen from fig. 2, in the preferred embodiment, the device is fixedly mounted on top of the bottle head 11. Wherein, the cover body 51 of the bottom cover 5 is located at the outermost side of the device, and a plurality of arc-shaped parts are arranged on the upper tightening ring 4, so that the ring body of the tightening ring can be stretched and rotated through the arc-shaped parts.

Fig. 3 is a schematic perspective view of a sealing device at the sealing position of the mouth of the volumetric flask according to a preferred embodiment of the present invention (with the body and part of the neck hidden). 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, three limiting edges 32 are uniformly distributed on the inner circumference of the ring body, and three arc-shaped parts 33 are arranged at the front end of the ring body. The top cover 4 is a cylindrical structure with an outer diameter equal to the inner diameter of the ring body 31, and three projections 46 extending to the radial outer side of the top cover 4 are arranged at the front end of the top cover 4. The three projections 46 are evenly distributed on the outer peripheral surface of the top of the lid body 4, and the edges thereof can pass through the gaps between the adjacent arc-shaped portions 33. Meanwhile, three sliding grooves 42 corresponding to the position of the limiting ribs 32 are uniformly distributed on the outer circumferential surface of the top cover 4, so that the tightening ring 3 can move along the axial direction. In addition, three notches 43 are uniformly distributed in the circumferential direction of the bottom edge of the top cover 4, and 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 bulge 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 schematic perspective view of a compression fastener of a sealing device according to a preferred embodiment of 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 device 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. Meanwhile, the three protrusions 46 are spaced apart from the three sliding grooves 42. The projection 46 can be movably connected with the upper structure of the bottom cover 5 at the outer side through the gap between the adjacent arc parts 33. Meanwhile, to prevent the protrusions 46 from rotating and interfering with the arc portions 33, the width of the gap between adjacent arc portions 33 is larger than that of the protrusions 46, so that the stopper rib 32 can be held at the bottom of the top cover 4.

Fig. 8 is a schematic perspective view of a bottom cover of a sealing device according to a preferred embodiment of the present invention. As can be seen from fig. 8, in the preferred embodiment, the bottom cover 5 is a hollow cylindrical structure, the front portion of which is circumferentially provided with three top cover fixing notches 52, and the bottom portion of which is provided with an inner ring 53 extending radially inward. The inner diameter of the inner ring 53 is greater than the maximum outer diameter of the collar 15 to prevent the entire device from being fitted over the bottle head. Meanwhile, in order to facilitate the tightening ring 3 to extrude the conical body 21, the connection part of the inner ring 53 and the inner wall of the bottom cover body 51 adopts a fillet transition.

The using process and principle of the device 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 fastening piece 2 is connected with the notch 43 of the top cover 4. Then, the bottom cover 5 is put on the bottom of the conical body 12, and the projection 46 is adjusted to be inserted and fixed in the bottom cover fixing notch 52, so that the whole device is formed into a whole. At this time, the tightening ring 3 can rotate in the gap between the top cover 4 and the bottom cover 5, and can telescopically press or loosen the conical body 21 in the axial direction of the bottom cover. When in use, the device is integrally buckled at the top of the bottle head 11 of the volumetric flask, and the combined body can be sleeved at the bottle head 11 by applying slight force because the conical main body 21 is made of flexible material. Then, the tightening ring 3 is pressed downwards 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 allow the stop rib 32 to enter the slide groove 42 and pull the arc portion 33 upward, and the assembly can be taken down after the tapered 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 (10)

1. A volumetric flask mouth sealing device is characterized by comprising an extrusion fastener (2), a tightening ring (3), a top cover (4) and a bottom cover (5); 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, and a plurality of convex blocks (46) extending along the radial direction are arranged at the upper part of the top cover (4); 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 the tightening ring is fixed at the bottom of the top cover (4) through rotating and clamping after the sliding groove (42) is separated; a plurality of arc parts (33) extending along the axial direction of the tightening ring (3) are uniformly distributed on the upper surface of the tightening ring (3) along the circumferential direction; 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, is sleeved outside the bottle head of the volumetric flask in a clearance mode, and 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; the bottom cover (5) comprises a cylindrical bottom cover body (51), a top cover fixing notch (52) is formed in the top of the bottom cover body (51), and an inner ring (53) extending inwards in the radial direction is formed in the bottom of the bottom cover body; the inner diameter of the inner ring (53) is not less than the maximum outer diameter of the volumetric flask head ring; the top cover fixing notch (52) is matched and connected with the convex block (46) of the top cover (4).

2. The closure of the bottle mouth of a volumetric flask 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 device for the bottleneck of the volumetric flask according to claim 2, wherein 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 closure device 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) press against 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 device for the mouth of a volumetric flask according to claim 1, characterized in that the inner diameter of the connecting ring (22) is not smaller than the maximum outer diameter of the head ring (15) at the top end of the head (11).

6. The closure of the bottle mouth of a volumetric flask 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 end of the bottle head (11).

7. The closure of the bottle mouth of a volumetric flask according to claim 6, characterized in that the inner diameter of the conical body (21) is equal to the smallest outer diameter of the ring (15) of the bottle head at the top of the bottle head (11).

8. The closure of the bottle mouth of a volumetric flask according to claim 1, characterized in that the ring body (31) of the tightening ring (3) has an axial length not less than the axial length of the conical body (21); the length of the arc-shaped part (33) is not less than 1.5 times the axial length of the conical main body (21).

9. The closure of a bottle mouth according to claim 1, characterized in that the width of the arc-shaped gap between adjacent arcs (33) is greater than the width of the projection (46).

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

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