A quick-change structure for sealing the mouth of a penicillin bottle

Abstract

The utility model discloses a kind of for sealing quick-change structure of westlin bottle mouth, including central shaft, the outside sleeve joint of central shaft has rotary seat, and the outside surface of the central shaft is equipped with at least two annular grooves, annular groove is provided with O type ring, O type ring outside and the inside surface of rotary seat contact;The cross-sectional shape of rotary seat is T-shaped, the outside surface of the lower part of rotary seat is slidably sleeved with sliding seat, the upper surface of sliding seat is equipped with recess, spring is provided in recess, the top of spring and the upper lower surface of rotary seat are connected, and the lower surface of sliding seat is fixedly installed with sealing gasket by screw.The spring distributed along the axial direction is arranged between sliding seat and rotary seat, using the elastic expansion characteristic of spring, different specifications westlin bottle height difference and rotor bottle position machining error can be self-adaptively compensated.

Description

Technical Field

[0001] This utility model relates to the field of experimental auxiliary equipment technology, specifically to a quick-change structure for sealing the mouth of a vial. Background Technology

[0002] As a common container in pharmaceutical and biological sample processing, vials often require centrifugation for separation and purification. During centrifugation, the rotor drives the vial to rotate at high speed, necessitating a reliable seal at the vial opening to prevent liquid splashing, aerosol leakage, or intrusion of external contaminants, while ensuring the safety of the centrifugation operation and the integrity of the sample.

[0003] Traditional sealing structures often employ rigid connection designs. However, in practical applications, different batches and sizes of vials vary in height, and machining errors in the centrifuge rotor can also lead to inconsistent vial neck heights. Rigid sealing structures cannot adaptively adjust, easily resulting in loose sealing surfaces and causing liquid leakage or seal failure during centrifugation. Furthermore, most existing sealing structures use screws to fix the rotating base or sealing gasket, requiring the removal of multiple fasteners and the complete dismantling of the sealing structure before reinstalling a suitable height seal – a cumbersome and time-consuming process. For batch sample processing scenarios, frequent replacement of sealing components significantly extends the downtime of the centrifuge unit, reducing operational efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a quick-change structure for sealing vials. By setting springs distributed along the axis between the sliding seat and the rotating seat, the elastic extension and contraction characteristics of the springs can adaptively compensate for the height differences of vials of different specifications and the machining errors of the rotor vial position, thereby improving universality and effectively solving the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-change sealing structure for vials, comprising a central shaft, a rotating seat sleeved on the outer side of the central shaft, and at least two annular grooves formed on the outer surface of the central shaft, with an O-ring disposed within the annular grooves, the outer side of the O-ring contacting the inner surface of the rotating seat; the rotating seat has a T-shaped cross-section, a sliding seat slidably sleeved on the lower outer surface of the rotating seat, a groove formed on the upper surface of the sliding seat, a spring disposed within the groove, the top end of the spring connected to the upper lower surface of the rotating seat, and a sealing gasket fixedly mounted on the lower surface of the sliding seat by screws.

[0006] As a preferred embodiment of this utility model, the upper surface of the sliding seat is provided with at least two mounting grooves, and a guide pin is provided in the mounting groove. The upper surface of the rotating seat is provided with a guide groove corresponding to the guide pin, and the upper part of the guide pin is slidably disposed in the guide groove.

[0007] As a preferred technical solution of this utility model, the sliding seat has an inverted T-shaped placement groove inside, and an inverted T-shaped equal-height screw is slidably arranged in the placement groove. The lower surface of the rotating seat has a screw hole corresponding to the equal-height screw, and the top end of the equal-height screw is threaded into the screw hole.

[0008] As a preferred embodiment of this utility model, the spring is a cylindrical helical compression spring, and the number of springs and grooves is 2-4, and the springs and grooves are evenly distributed circumferentially along the central axis.

[0009] As a preferred embodiment of this utility model, the O-ring is made of fluororubber or nitrile rubber, and has a cross-sectional diameter of 1.5-3mm.

[0010] As a preferred technical solution of this utility model, the sealing gasket is made of silicone rubber, and the bottom end face of the sealing gasket is provided with an annular sealing protrusion. The cross-section of the annular sealing protrusion is semi-circular, and the diameter is adapted to the inner diameter of the vial mouth.

[0011] Compared with existing technologies, the advantages of this invention are as follows: By setting axially distributed springs between the sliding seat and the rotating seat, the elastic extension and contraction characteristics of the springs can adaptively compensate for the height differences of different sizes of vials and the machining errors of the rotor bottle position. During centrifugation, even if the bottle body experiences slight axial displacement due to centrifugal force, the springs can synchronously adjust their compression to continuously provide stable sealing pressure, ensuring that the sealing gasket and the bottle mouth are always tightly fitted. This completely solves the problem of poor sealing in traditional rigid structures and effectively avoids liquid leakage and aerosol contamination. The radial fit design of the O-ring with the central shaft and rotating seat utilizes the static friction generated by the radial deformation of the O-ring to achieve detachable fixing of the rotating seat and the central shaft. When replacing the sealing gasket or rotating seat, there is no need to remove the screws; only axial tension is required to remove the rotating seat. During installation, simply press it into place to fix it. The single replacement operation time is ≤30 seconds, which is 10-20 times more efficient than traditional structures, significantly reducing the downtime for centrifuge equipment maintenance, and is especially suitable for batch sample processing scenarios. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] In the diagram: 1. Screw, 2. Sealing gasket, 3. Sliding seat, 4. Spring, 5. Rotary seat, 6. Guide pin, 7. Central shaft, 8. O-ring, 9. Equal height screw. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1 This utility model provides a technical solution: a quick-change sealing structure for vials, including a central shaft 7. The upper outer side of the central shaft 7 is connected to the upper part of a centrifuge via bearings, etc. During centrifugation, the vial, sealing gasket 2, sliding seat 3, rotating seat 5, and central shaft 7 rotate synchronously. The rotating seat 5 is sleeved on the outer side of the central shaft 7, and at least two annular grooves are formed on the outer surface of the central shaft 7. An O-ring 8 is provided in the annular groove. The outer side of the O-ring 8 contacts the inner surface of the rotating seat 5. The radial fit design of the O-ring 8 with the central shaft 7 and the rotating seat 5 generates a static friction force of 50-100N through the radial deformation of the O-ring 8, realizing the detachable fixation of the rotating seat 5 and the central shaft 7. When replacing the sealing gasket 2 or the rotating seat 5, there is no need to remove the screws. Only an axial tensile force (100-150N) is needed to remove the rotating seat 5. During installation, simply press it into place to fix it. The operation time for a single replacement is ≤30 seconds, which is 10-20 times more efficient than the traditional structure. This significantly reduces the downtime maintenance time of the centrifuge device and is especially suitable for batch sample processing scenarios.

[0016] During installation: Align the center hole of the rotating seat 5 with the center shaft 7 and press the rotating seat 5 upward. At this time, the inner wall of the rotating seat 5 will squeeze the O-ring 8, causing the O-ring 8 to undergo radial deformation. The deformed O-ring 8 generates radial friction through elastic restoring force. This friction will fix the rotating seat 5 on the center shaft 7. Installation can be completed without tightening the screws. The installation time is ≤10 seconds.

[0017] During disassembly: When it is necessary to replace the sealing gasket 2 or maintain this device, apply an axial downward pulling force to the rotating seat 5 (the pulling force must be greater than the static friction force of the O-ring, about 100-150N); the O-ring 8 will slide axially under the pulling force and briefly increase radial deformation. After the rotating seat 5 disengages from the central shaft 7, the O-ring will return to its initial shape, and the rotating seat can be removed for replacement. The disassembly time is ≤5 seconds.

[0018] In addition to providing the friction required for quick changes, the O-ring 8 can also seal the gap between the central shaft 7 and the rotating seat 5, preventing liquid or dust from entering the internal structure and contaminating the components during centrifugation.

[0019] The rotating seat 5 has a T-shaped cross-section. A sliding seat 3 is slidably fitted onto the lower outer surface of the rotating seat 5. A groove is formed on the upper surface of the sliding seat 3, and a spring 4 is installed in the groove. The top of the spring 4 is connected to the upper lower surface of the rotating seat 5. By setting the spring 4 axially distributed between the sliding seat 3 and the rotating seat 5, the elastic expansion and contraction characteristics of the spring 4 can adaptively compensate for the height differences of different sizes of vials and the machining errors of the rotor vial position. During centrifugation, even if the vial body undergoes slight axial displacement due to centrifugal force, the spring 4 can synchronously adjust the compression amount to continuously provide a stable sealing pressure, ensuring that the sealing gasket and the vial mouth are always tightly fitted. This completely solves the problem of poor sealing in traditional rigid structures and effectively avoids liquid leakage and aerosol contamination.

[0020] A sealing gasket 2 is fixedly installed on the lower surface of the sliding seat 3 by screw 1. The sealing gasket 2 is used to seal the mouth of the vial. The sealing gasket 2 is made of silicone rubber. The bottom end face of the sealing gasket 2 is provided with an annular sealing protrusion. The cross-section of the annular sealing protrusion is semi-circular, and its diameter is adapted to the inner diameter of the vial mouth to enhance the sealing performance between the sealing gasket 2 and the vial mouth.

[0021] In a preferred embodiment, the upper surface of the sliding seat 3 is uniformly provided with at least two mounting grooves, and a guide pin 6 is fixedly installed in each mounting groove. The upper surface of the rotating seat 5 is provided with a guide groove corresponding to the guide pin 6. The upper part of the guide pin 6 is slidably installed in the guide groove. The guide pin 6 is used to guide the sliding seat 3, enabling it to slide vertically on the outside of the rotating seat 5 without rotating, thus improving the stability of the centrifugal sealing process. By using the uniformly arranged guide pins 6 to restrict the relative circumferential rotation of the rotating seat 5 and the sliding seat 3, the sliding seat 3 is prevented from rotating synchronously with the rotor during centrifugal rotation, thus preventing relative friction and wear between the sealing gasket 2 and the bottle mouth, and extending the service life of the sealing gasket 2.

[0022] In a preferred embodiment, the sliding seat 3 has an inverted T-shaped groove inside, and an inverted T-shaped equal-height screw 9 is slidably disposed within the groove. The lower surface of the rotating seat 5 has a threaded hole corresponding to the equal-height screw 9, and the top end of the equal-height screw 9 is threaded into the threaded hole. When the sliding seat 3 is not under force, the spring 4 is in an extended state (e.g., Figure 1 As shown in the figure, at this time, the screw cap at the bottom of the equal height screw 9 is stuck at the step of the placement groove, which limits the distance between the sliding seat 3 and the rotating seat 5, ensuring the reset height of the sliding seat 3.

[0023] In the preferred technical solution, the spring 4 is a cylindrical helical compression spring, the number of spring 4 and groove is 2-4, and the spring 4 and groove are evenly distributed along the circumference of the central axis 7. The elastic coefficient of the spring (4) is in the range of 1.5-6 N / mm, so as to meet the height difference compensation requirements of different specifications of vials.

[0024] In a preferred embodiment, the O-ring 8 is made of fluororubber or nitrile rubber with a cross-sectional diameter of 1.5-3mm. The radial fit clearance between the central shaft 7 and the rotating seat 5 is 0.1-0.3mm. The radial compression of the O-ring 8 (0.2-0.5mm) generates a static friction force of 50-100N, ensuring that the rotating seat 5 remains fixed when there is no external force.

[0025] The structure is composed of conventional components such as sliding seat 3, spring 4, rotating seat 5, and O-ring 8. It has no complex power mechanism, making it easy to manufacture and cost-effective. The equalizing screw 9 limits the maximum reset height of the rotating seat 5, preventing the spring 4 from over-extension and failure. All components work together stably, ensuring high reliability in long-term use and reducing subsequent maintenance costs.

[0026] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-change structure for sealing the mouth of a vial, characterized in that: The device includes a central shaft (7), a rotating seat (5) is sleeved on the outer side of the central shaft (7), and at least two annular grooves are provided on the outer surface of the central shaft (7). An O-ring (8) is provided in the annular groove, and the outer side of the O-ring (8) contacts the inner surface of the rotating seat (5). The rotating seat (5) has a T-shaped cross-section. A sliding seat (3) is slidably sleeved on the lower outer surface of the rotating seat (5). A groove is provided on the upper surface of the sliding seat (3), and a spring (4) is provided in the groove. The top of the spring (4) is connected to the upper lower surface of the rotating seat (5). A sealing gasket (2) is fixedly installed on the lower surface of the sliding seat (3) by a screw (1).

2. The quick-change structure for sealing vials according to claim 1, characterized in that: The upper surface of the sliding seat (3) is evenly provided with at least two mounting grooves, and a guide pin (6) is provided in the mounting groove. The upper surface of the rotating seat (5) is provided with a guide groove corresponding to the guide pin (6), and the upper part of the guide pin (6) is slidably provided in the guide groove.

3. The quick-change structure for sealing vials according to claim 1, characterized in that: The sliding seat (3) has an inverted T-shaped placement groove inside, and an inverted T-shaped equal-height screw (9) is slidably placed in the placement groove. The lower surface of the rotating seat (5) has a screw hole corresponding to the equal-height screw (9), and the top end of the equal-height screw (9) is threaded into the screw hole.

4. The quick-change structure for sealing vials according to claim 1, characterized in that: The spring (4) is a cylindrical helical compression spring. The number of springs (4) and grooves is 2-4, and the springs (4) and grooves are evenly distributed along the circumference of the central axis (7).

5. The quick-change structure for sealing vials according to claim 1, characterized in that: The O-ring (8) is made of fluororubber or nitrile rubber, and has a cross-sectional diameter of 1.5-3 mm.

6. The quick-change structure for sealing vials according to claim 1, characterized in that: The sealing gasket (2) is made of silicone rubber. The bottom end face of the sealing gasket (2) is provided with an annular sealing protrusion. The cross-section of the annular sealing protrusion is semi-circular, and its diameter is adapted to the inner diameter of the vial mouth.

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