Volumetric flask opening buckling and pressing type sealing device

Abstract

The utility model discloses a buckling and pressing type sealing device for an opening of a volumetric flask, and belongs to the technical field of chemical detection. The device is composed of a pressing piece and a sealing piece. The pressing piece is provided with an extrusion table, and the sealing piece comprises a supporting body and a sealing body. And a mounting cavity for inserting a bottle head is arranged between the outer wall of the sealing body and the inner wall of the supporting body. A through fixing cavity is formed in the middle of the sealing body, and the extrusion table is inserted into the fixing cavity and extrudes the sealing body, so that the inner conical surface of the bottle head is sealed. The sealing piece is provided with an inserting body, a cavity in the middle of the inserting body is communicated with the fixing cavity, the inserting body is provided with an inserting part, and an annular groove is formed in the inserting part. The pressing piece is provided with a column connected with the extrusion table, and the column is provided with an annular protruding edge matched with the annular groove. The inserting part clamps the pressing piece when the extrusion table is separated from the fixing cavity, and the pressing piece is inserted into the fixing cavity and fixed through cooperation of the groove and the protruding edge when the extrusion table is inserted into the fixing cavity. The device is connected into a whole during use and storage, and the problem that parts are lost or mismatched due to mixed placement is solved.

Description

Technical Field

[0001] This utility model relates to a pressure-sealing device for the mouth of a volumetric flask, belonging to the field of chemical detection technology. Background Technology

[0002] Volumetric flasks are among the most common glassware in chemical experiments, primarily used for standardizing various solutions. Currently, the most common volumetric flasks are pear-shaped with a narrow diameter (e.g.,...). Figure 1 (As shown). A volumetric flask mainly consists of a pear-shaped body 13 for holding the solution and a long, narrow neck 12. A conical head 11 is typically located at the top of the neck 12, with a cap with a round handle inserted inside. A fixed calibration line 14 is located in the middle of the neck. Since the calibration solution can have any acidity, alkalinity, and composition, most existing volumetric flasks are made of corrosion-resistant and easily observable glass. Besides being fragile, the most common problem encountered during the use of volumetric flasks is the sealing problem between the head and stopper during volumetric mixing.

[0003] Generally, the inner wall of a volumetric flask head is a conical surface, wider at the top and narrower at the bottom, with a frosted finish. The outer shape of the stopper matches the inner wall of the head perfectly. However, during use, repeated twisting and friction cause the outer surface of the stopper and the inner conical surface of the head to become increasingly mismatched, frequently leading to leakage. To achieve a seal and facilitate insertion and removal, researchers often apply a layer of petroleum jelly to the outer surface of the stopper. However, on the one hand, petroleum jelly can contaminate the calibration solution during mixing, affecting the purity and concentration of the solution; on the other hand, it cannot fundamentally solve the leakage problem when wear is severe or the stopper is mismatched. Furthermore, because the stopper is separate from the flask body, improper management can easily lead to confusion and prevent the one-to-one correspondence of original parts from being achieved. Although the outer diameter of the volumetric flask head is generally uniform, the inner diameter varies considerably, and non-original stoppers usually result in leakage.

[0004] To solve the problem of leakage of the bottle head and the easy loss and confusion of the bottle plug, the existing technical personnel has proposed a plurality of solutions. For example, the existing patent CN 208990830U discloses a sealed capacity bottle with excellent sealing for laboratory. In addition to having a pear-shaped bottom and a thin neck, the capacity bottle also includes a protective sleeve fixedly connected to the sidewall of the thin neck, which includes a protective part and a guide part. The capacity bottle includes a plurality of components such as a fixing ring, a plurality of guide plates, a guide chute, a limiting insert plate, etc., and has the problem of overly complex structure. For another example, the existing technology CN 205574582U discloses a high-sealing-capacity bottle. The capacity bottle includes a bottle body and a cover, the cover includes a plug and a sleeve body sleeved on the outer side of the upper end of the plug, and the plug is provided with a threaded part. The upper end of the bottle body is provided with a circle of outwardly protruding butt flanges, and the upper surface of the butt flanges is installed with four loose rubber bodies. The plug is connected with the inner wall of the bottle head through the threaded part. Although the capacity bottle has a simple structure and good sealing effect, it is very easy to damage due to the fact that most capacity bottles are made of glass material and the bottle head is often thin. For another example, the existing technology CN104210742B discloses a lid for sealing the mouth of a glass capacity bottle. The lid includes a lid top, a lid wall and a buckle integrally connected. The lid wall is vertically connected with the lid body in a circular tube shape, and the buckle is an angular protrusion provided on the inner wall bottom edge of the lid wall. The lid has the advantages of simple structure and convenient operation, but due to the fact that the force with a certain angle to the axial direction of the bottle neck will be generated when the lid is installed and removed, and the capacity bottle body is often brittle and has small structural strength, the bottle neck can be easily broken if not careful.

[0005] The inventor has proposed two utility model patent applications in 2020 to solve the problems of easy leakage of the bottle head and plug of the capacity bottle, complex sealing structure and easy damage. The application number is 202021253744.1 and 202021253793.5. The former is composed of three components: extrusion fastener, tightening ring and top cover. The bottom of the extrusion fastener is made of flexible material in a tapered structure with narrow top and wide bottom, which can be sealed and fixed at the bottle head by extruding and tightening through the tightening ring. The latter is composed of four components: extrusion fastener, tightening ring, top cover and bottom cover. The bottom of the extrusion fastener is made of flexible material in a tapered structure with narrow top and wide bottom, which can be sealed and fixed at the bottle head by extruding and tightening through the tightening ring.

[0006] In use, the inventor found that the above two technical solutions can perfectly solve the problem of leakage prevention, but still have problems such as too many parts and complex structure. Therefore, the inventor improved the above-mentioned scheme and proposed a third utility model patent in 2022, with application number 202122131561.3. This scheme further reduces the number of parts to two, i.e. only composed of a pressing member and a sealing member, and further simplifies the structure. The pressing member is provided with a sleeve, and a plurality of convex edges are provided on the inner wall of the free end of the sleeve, and an extrusion table is provided in the sleeve along the axial direction. The support body of the sealing member is provided with a groove for cooperating with the convex edge on the outer side, and the inner side of the sealing member support body is provided with an elastic sealing body. The scheme realizes the sealing of the inner conical surface of the bottle head by inserting and extruding the sealing body with the extrusion table of the pressing member, and then rotating to make the convex edge disengage from the groove and be fixed on the end face of the sealing member support body. Although this scheme effectively reduces the number of parts and reduces the complexity of the structure, when storing the bottle head sealing device, if the pressing member and the sealing member are assembled as a whole for storage, the following problems will be faced: on the one hand, the extrusion table is always inserted in the sealing body, which will cause the sealing body to deform for a long time, resulting in reduced sealing performance, on the other hand, when in use, the extrusion member and the sealing member need to be separated first, and the sealing member fixed in the sleeve of the pressing member is difficult to remove. However, if not assembled and stored separately, it is easy to cause problems such as loss, confusion, mismatch, etc. Utility model content

[0007] To solve the problem that the existing capacity bottle bottle head sealing device is easy to be confused and lost when stored, and the integrated storage easily reduces the sealing performance of the sealing member, the utility model provides a capacity bottle bottle opening clamping and pressing type sealing device, and the technical scheme adopted is as follows:

[0008] A capacity bottle bottle opening clamping and pressing type sealing device is composed of a pressing member 2 and a sealing member 3; the pressing member 2 is provided with an extrusion table 21; the sealing member 3 includes a hard support body 31 on the outer side and an elastic sealing body 33 coaxial with the support body 31 on the inner side; an installation cavity 36 for inserting a capacity bottle bottle head 11 is arranged between the outer wall of the sealing body 33 and the inner wall of the support body 31; a through fixing cavity 35 is arranged in the middle of the sealing body 33, the extrusion table 21 is inserted into the fixing cavity 34 and extrudes the sealing body 33, thereby realizing the sealing of the inner conical surface of the bottle head 11. An insertion body 32 is further arranged on the sealing member 3, the middle cavity of the insertion body 32 is communicated with the fixing cavity 35, and the insertion body 32 is provided with unconnected insertion parts around the middle cavity; an annular groove 34 is arranged on the insertion part; the pressing member 2 is provided with a column 22 connected with the extrusion table 21, and the column 22 is provided with convex edges 24 matched with the annular groove 34; the insertion part is clamped to the pressing member 2 when the extrusion table 21 is separated from the fixing cavity 35, and is fixed by the cooperation of the groove 34 and the convex edge 24 when the extrusion table 21 is inserted into the fixing cavity 35.

[0009] Preferably, the middle cavity of the plug body 32 is coaxial with the fixing cavity 35.

[0010] More preferably, the middle cavity has the same inner diameter as the fixing cavity 35 and the same outer diameter as the column 22; the outer diameter of the annular protrusion 24 is equal to the inner diameter of the annular groove 34.

[0011] Preferably, the annular groove 34 is two; when the annular protrusion 24 is embedded in the groove 34 close to the fixing cavity 35, the extrusion table 21 is inserted into the fixing cavity 35; when the annular protrusion 24 is embedded in the groove 34 away from the fixing cavity 35, the extrusion table 21 is separated from the fixing cavity 35.

[0012] Preferably, the column 22 of the compression part 2 is symmetrically provided with wings 23 on the side close to the protrusion 24; the wings 23 extend radially outward along the column 22.

[0013] Preferably, the extrusion table 21 of the compression part 2 is provided with a sleeve 25 on the outside; the sleeve 25 is fixedly connected to the column 22 through an end face, and a gap is provided between the sleeve 25 and the extrusion table 21.

[0014] More preferably, a fan hole 26 is provided on the end face of the sleeve 25; the cross section of the plug part of the plug body 32 is the same as the cross section of the fan hole 26, and the plug part passes through the fan hole 26 to achieve the movable connection between the sleeve 25 and the plug body 32.

[0015] Preferably, the extrusion table 21 has a circular table structure, and the large-diameter end face is integrated with the column 22.

[0016] Preferably, the width of the mounting cavity 36 is not greater than the thickness of the bottle head 11.

[0017] Preferably, the fixing cavity 35 is a cylindrical cavity or a circular table-shaped cavity with a smaller taper than the extrusion table 21, and the cross-sectional diameter of the fixing cavity 35 changes in a range between the minimum diameter and the maximum diameter of the cross section of the extrusion table 21.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The sealing device provided by the utility model is connected with the compression part through the plug body provided on the sealing part, and is connected with the annular protrusion on the compression part through the annular groove provided on the plug body, so that the fixing after sealing is realized. After the compression part is pulled out, the extrusion table is separated from the fixing cavity, so that the pressure of the extrusion table on the fixing cavity is eliminated, and the sealing performance is prevented from being reduced due to long-time extrusion deformation. The compression part and the sealing part are connected through the clamping and fixing of the compression part and the plug body of the sealing part, so that the two parts are uniformly stored one by one during the pulling-out and storage of the bottle head, and the problems of part loss, confusion and mismatching are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1It is a front view structure schematic diagram of the existing volumetric flask (excluding the bottle plug).

[0021] Figure 2 It is a front view structure schematic diagram of the pressing part in the sealing device of the third preferred embodiment of the utility model.

[0022] Figure 3 It is a front view structure schematic diagram of the pressing part in the sealing device of the second preferred embodiment of the utility model.

[0023] Figure 4 It is Figure 3 It is a schematic diagram of the perspective structure of another view.

[0024] Figure 5 It is a schematic diagram of the perspective structure of another view.

[0025] Figure 6 It is Figure 5 It is a schematic diagram of the perspective structure of another view.

[0026] Figure 7 It is a schematic diagram of the perspective structure of another view.

[0027] Figure 8 It is Figure 7 It is a schematic diagram of the perspective structure of another view.

[0028] Figure 9 It is Figure 7 It is a schematic diagram of the perspective structure of another view.

[0029] Figure 10 It is a schematic diagram of the perspective structure of another view.

[0030] Figure 11 It is a schematic diagram of the perspective structure of another view.

[0031] Figure 12 It is a front view structure schematic diagram of the sealing device of the second preferred embodiment of the utility model.

[0032] Figure 13 It is Figure 12 It is a schematic diagram of the perspective structure of another view.

[0033] Figure 14 It is a schematic diagram of the perspective structure of another view.

[0034] The reference signs involved in the above drawings are as follows:

[0035] 1, volumetric flask; 2, pressing part; 3, sealing part;

[0036] 11, bottle head; 12, bottle neck; 13, bottle body; 14, calibration line; 15, bottle head ring;

[0037] 21, pressing table; 22, column; 23, wing; 24, ridge; 25, sleeve; 26, fan hole;

[0038] 31, support body; 32, plug-in body; 33, sealing body; 34, groove; 35, fixed cavity; 36, mounting cavity. DETAILED DESCRIPTION

[0039] In the following description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and "vertically" indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0040] In the following description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two components. For ordinary skilled in the art, the specific meaning of the terms in the present application can be understood according to the specific circumstances.

[0041] In addition, in the following description of the present application, unless otherwise stated, the meaning of "multiple", "multiple groups", "multiple roots" is two or more than two.

[0042] The materials, reagents, devices, equipment, methods and control processes used in the following examples are not specially described, and can be obtained by commercial channels or can be routinely set according to specific needs by ordinary skilled in the art, without creative labor.

[0043] The present application will be further described in detail below with reference to the accompanying drawings, but the present application is not limited by the following detailed description.

[0044] Figure 2 is a front view structural schematic diagram of the pressing element in the sealing device of a preferred embodiment of the present application. From the figure, it can be seen that the pressing element is provided with a pressing body 31 and a plug-in body 32. Figure 2It can be seen that, in the preferred embodiment, the pressing member 2 is of an integral structure, the bottom of which is a circular truncated cone structure with a certain taper, namely an extrusion platform 21, for extrusion sealing. The upper part of the extrusion platform 21 is a column 22 of a cylindrical shape, the two sides of which extend outwardly as wings 23, and the top of the column 22 extends outwardly as a convex rib 24 with a semicircular arc outer surface. The convex rib 24 is used for clamping and fixing, and the wings 23 facilitate the disengagement of the pressing member 2 from the plugged state.

[0045] Figure 3 It is a front view structural schematic diagram of the pressing member in the sealing device of the second preferred embodiment of the present application. Figure 4 It is Figure 3 It is a perspective structural schematic diagram from another viewing angle. From Figure 3 and Figure 4 It can be seen that, in the preferred embodiment, the extrusion platform 21, the column 22 and the convex rib 24 adopt the same form as shown in the scheme. Figure 2 The difference is that a sleeve 25 is arranged on the periphery of the column 22, the sleeve 25 is connected with the column 22 through an end face, and two fan holes 26 are oppositely arranged on the end face, for penetrating and connecting with the sealing member 3. The presence of the sleeve 25 is conducive to increasing the contact area of the user, facilitating the pulling out after the extrusion platform 21 of the pressing member 2 is inserted into the fixed cavity 35. At the same time, the free end face of the sleeve 25 can also prevent the pressing member 2 from being inserted too deeply, causing damage to the bottle opening of the volumetric flask.

[0046] Figure 5 It is a top view structural schematic diagram of the pressing member in the sealing device of the third preferred embodiment of the present application. Figure 6 It is Figure 5 It is a perspective structural schematic diagram from another viewing angle. From Figure 5 and Figure 6 It can be seen that, in the preferred embodiment, the pressing member 2 is provided with the sleeve 25 and the wings 22 on the column 22, and the top surface of the wings 22 is integrated with the top surface of the column 22, thereby dividing the convex rib 24 into two parts. The fan holes 26 are located on the two sides of the wings 22, and the positions correspond to the two parts of the convex rib 24, so as to facilitate the plug-in connection of the inserted part of the sealing member 3 penetrating out of the fan holes 26 with the convex rib 24.

[0047] Figure 7 It is a perspective structural schematic diagram of the sealing member in the sealing device of the preferred embodiment of the present application. Figure 8 It is Figure 7 It is a bottom view. Figure 9 It is Figure 7 It is a top view. From Figures 7-9It can be seen that in the preferred embodiment, the bottom of the sealing member 3 is a large-diameter support body 31, and a small-diameter annular elastic sealing body 33 is arranged inside the support body 31. A gap, i.e. an installation cavity 36, is left between the support body 31 and the annular sealing body 33, so as to facilitate the connection between the bottle head 11 and the sealing member 3 in use. The middle part of the sealing body 33 is a fixing cavity 35, and the extrusion table 21 of the pressing member 2 is inserted into the fixing cavity 35 in use, so that the sealing body 33 is deformed to realize the sealing of the bottle opening 11.

[0048] An insertion body 32 with a smaller diameter than the support body 31 is arranged at the upper part of the support body 31. A hollow cavity is arranged in the middle part of the insertion body 32 and communicates with the fixing cavity 35, so as to provide a space for the extrusion table 21 and the column 22 to pass through. The insertion body 32 mainly has two parts, one part is an annular base, and the other part is two identical and independently arranged insertion bodies 32 extending upward from the annular base. The shape and specifications of the insertion body 32 are matched with the fan hole 26, and in use, the insertion body 32 passes through the fan hole 26 to realize the movable connection between the pressing member 2 and the sealing member 3. Meanwhile, the insertion body 32 is internally provided with upper and lower annular grooves 34, which are used for cooperating with the convex edges 24 on the column 22. The lower groove 24 is fixedly connected after the extrusion table 21 is inserted into the fixing cavity 35, and the upper groove 24 is fixedly connected after the extrusion table 21 is pulled out of the fixing cavity 35.

[0049] Figure 10 The third preferred embodiment of the sealing device of the utility model is a perspective structural schematic view of a sealing member. As can be seen from the figure, Figure 10 The main structure of the sealing member 3 in the preferred embodiment is basically the same as that shown in the scheme, Figures 7-9 The only difference is that only one arc-shaped groove is arranged in the insertion body 32, which is used for fixing when the extrusion table 21 is inserted into the fixing cavity 35. When pulled out, the convex edges are directly clamped by the two opposite insertion bodies 32. Or a pin (or other existing known components) is inserted through the opposite holes in the insertion body 32 to prevent the pressing member 2 from being separated. When pulled out, since the bottom end face of the extrusion table 21 does not exceed the upper surface of the base of the insertion body 32, the pressing member 2 can be prevented from being separated by blocking the end face of the insertion body 32 by a pin.

[0050] Figure 11 The fourth preferred embodiment of the sealing device of the utility model is a perspective structural schematic view of a sealing member. As can be seen from the figure, Figure 11 It can be seen that in the preferred embodiment, the sealing device adopts Figure 2 and Figures 7-9The pressing part 2 and the sealing part 3 are shown. When sealing, the pressing part 2 is pressed down to the bottom, and the pressing plate 21 is inserted into the fixed cavity 35 and is flush with the bottom surface of the fixed cavity 35. Since the pressing part 2 is not sleeved, the bottom surface of the wing 23 of the pressing part 2 abuts against the upper surface of the base of the insertion body 32. Meanwhile, the convex rib 24 at the top of the column 22 is embedded into the groove 34, thereby fixing the pressing part 2 and the sealing part 3.

[0051] Figure 12 It is a front view structural schematic diagram of a sealing device of a second preferred embodiment of the utility model. Figure 13 It is Figure 12 a perspective view. From Figure 12 and Figure 13 it can be seen that, in the preferred embodiment, the sealing device adopts Figure 3 and 4 the pressing part 2 and Figure 10 the sealing part shown in the figure. When sealing, the bottle head 12 of the volumetric flask is inserted into the installation cavity 36 of the sealing part 3. The pressing part 2 is provided with a sleeve, and the outer diameter of the sleeve is the same as the outer diameter of the supporting body. The insertion body 32 of the sealing part 3 is provided with only one groove 34, and the convex rib 24 of the column 22 is embedded into the groove 34 when sealing, thereby fixing the two components. When it is needed to pull out the pressing part 2, the insertion body 32 can be slightly pressed outward to provide enough space for the convex rib 24 to be separated from the groove 34, and then the pressing part 2 is pulled out.

[0052] Figure 14 It is a perspective structural schematic diagram of a sealing device of a third preferred embodiment of the utility model. From Figure 14 it can be seen that, in the preferred embodiment, the sealing device adopts Figure 10 the sealing part shown in the figure and Figure 5 , 6 the pressing part shown in the figure. Since the wing 23 is arranged at the upper portion of the column 22 of the pressing part 2, it is more convenient and fast to pull out the pressing part 2.

[0053] The use process and principle of the device are as follows:

[0054] When the sealing is needed, the user holds the sealing member 3 with hand to send the bottle head 12 into the installation cavity 36, and then presses the top of the column 22 downward, so that the pressing member 2 goes down along the hollow cavity-installation cavity until the pressing platform 21 presses the sealing body 33 to be close to the inside of the bottle head 12. Meanwhile, the convex rib 24 on the column 22 is embedded into the groove 34, so as to fix the two. When the pressing member 2 is needed to be pulled out, the user slightly expands the spacing between the two insertion parts of the insertion bodies 32 with hand, and then pulls out the pressing member 2 after the convex rib 24 provides enough space to separate from the groove 34. When the pressing member 2 is pulled out, only the pressing platform 21 is needed to separate from the sealing body 33, so as to prevent the continuous pressing. At this time, the convex rib 24 on the column 22 can be clamped in the groove 34 of the upper part, or can be directly clamped between the two insertion bodies. The sealing device does not need to separate the two parts after use, so as to facilitate the management, avoid the mismatching due to the mixed placement, and avoid the use failure due to the loss. Meanwhile, the two parts can be separated, so as to avoid the pressing platform 21 to press the sealing body 33.

[0055] Although the utility model has disclosed as above with preferable embodiments, it is not used to limit the utility model, anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the claims.

Claims

1. A pressure-sealing device for the neck of a volumetric flask, comprising a clamping member (2) and a sealing member (3); the clamping member (2) is provided with a pressing platform (21); the sealing member (3) includes a rigid support body (31) located on the outer side and an elastic sealing body (33) located on the inner side and coaxial with the support body (31); an installation cavity (36) for inserting a volumetric flask head (11) is provided between the outer wall of the sealing body (33) and the inner wall of the support body (31); a through fixed cavity (35) is provided in the middle of the sealing body (33), and the pressing platform (21) is inserted into the fixed cavity (35) and presses the sealing body (33) to achieve a seal on the inner conical surface of the bottle head (11); characterized in that, The sealing element (3) is also provided with a plug body (32), the middle cavity of the plug body (32) is connected to the fixed cavity (35), and the plug body (32) is provided with a non-connected plug part around the middle cavity; an annular groove (34) is provided on the plug part; the clamping element (2) is provided with a column (22) connected to the extrusion table (21), and a protrusion (24) matching the annular groove (34) is provided on the column (22); the plug part locks the clamping element (2) when the extrusion table (21) is separated from the fixed cavity (35), and is fixed by the cooperation of the groove (34) and the protrusion (24) when the extrusion table (21) is inserted into the fixed cavity (35).

2. The bottle neck snap-lock sealing device according to claim 1, characterized in that, The central cavity of the connector (32) is coaxial with the fixed cavity (35).

3. The bottle neck snap-lock sealing device according to claim 2, characterized in that, The inner diameter of the central cavity is the same as that of the fixed cavity (35) and the outer diameter of the column (22); the outer diameter of the annular convex ridge (24) is equal to the inner diameter of the annular groove (34).

4. The bottle neck snap-lock sealing device according to claim 1, characterized in that, The annular groove (34) is two; when the annular protrusion (24) is inserted into the groove (34) near the fixed cavity (35), the extrusion table (21) is inserted into the fixed cavity (35), and when it is inserted into the groove (34) away from the fixed cavity (35), the extrusion table (21) is disengaged from the fixed cavity (35).

5. The bottle neck snap-lock sealing device according to claim 1, characterized in that, A wing (23) is symmetrically provided on the side of the column (22) of the clamping member (2) near the protrusion (24); the wing (23) extends radially outward along the column (22).

6. The bottle neck snap-lock sealing device according to claim 1, characterized in that, A sleeve (25) is provided on the outside of the extrusion table (21) of the clamping member (2). The sleeve (25) is fixedly connected to the column (22) through the end face. A gap is provided between the sleeve (25) and the extrusion table (21).

7. The bottle neck snap-lock sealing device according to claim 6, characterized in that, A fan hole (26) is provided on the end face of the sleeve (25); the fan hole (26) has the same cross section as the insertion part of the plug body (32), and the insertion part passes through the fan hole (26) to realize the movable connection between the sleeve (25) and the plug body (32).

8. The bottle neck snap-lock sealing device according to claim 1, characterized in that, The extrusion table (21) is a frustum structure, with its large-diameter end face connected to the column (22) as a whole.

9. The bottle neck snap-lock sealing device according to claim 1, characterized in that, The width of the mounting cavity (36) is not greater than the thickness of the bottle head (11).

10. The bottle neck snap-lock sealing device according to claim 1, characterized in that, The fixed cavity (35) is a cylindrical cavity or a frustum-shaped cavity with a taper smaller than that of the extrusion table (21), and the diameter of the fixed cavity (35) varies between the minimum and maximum diameters of the extrusion table (21).

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