A rotary sampling tube for a concentration settling tank

Abstract

This utility model discloses a rotary sampling tube for a concentration settling tank, suitable for concentration settling tanks with sampling holes on the side wall of the tank. The rotary sampling tube includes a sterile flange mounted on the sampling hole and a sleeve that is sterilely and sealed to the tank body via the sterile flange. A connecting tube is disposed within the sleeve and can rotate relative to the sleeve, with one end positioned outside the tank body and the other end penetrating the sleeve and positioned inside the tank body. An inner bend is airtightly connected to the other end of the connecting tube and extends into the tank body, rotating under the influence of the connecting tube. A rotating assembly is located at the connection between the connecting tube and the sleeve. Rotating the connecting tube drives the inner bend to rotate 360 ​​degrees within the tank, allowing the operator to flexibly select the optimal sampling position based on observation, effectively avoiding localized sedimentation areas, significantly improving the representativeness and accuracy of the sampling, solving the problem of sampling distortion caused by the non-adjustable position of fixed sampling tubes, while maintaining the sterile and sealed state of the tank body.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, specifically to a rotary sampling tube for a concentration settling tank. Background Technology

[0002] Concentration settling tanks are key equipment in pharmaceutical, chemical, and other fields for solid-liquid separation. Their working principle relies on the natural settling of materials under gravity, forming a concentration gradient from top to bottom: clear liquid at the top, suspension slurry in the middle, and concentrated sediment at the bottom. To effectively monitor the settling process and obtain representative samples, fixed sampling points are typically set at different heights within the tank. However, traditional sampling tubes are mostly fixed horizontally, and their sampling port positions are not adjustable, leading to significant limitations in practical operation. Due to the influence of fluid dynamics within the tank, the distribution of solid particles at the same horizontal level is often uneven, potentially resulting in localized sediment accumulation zones or flow dead zones. Fixed sampling tubes cannot avoid these areas, easily drawing in flocculent matter or sediment particles during sampling. This means the sample does not accurately reflect the material state at that height, especially when sampling from the middle or bottom. This non-representative sampling method not only affects the accurate judgment of process parameters but may also mislead production control decisions, increasing product quality risks. Therefore, how to achieve flexible selection and precise positioning of sampling points without disrupting the sterile environment inside the tank, so as to obtain more representative samples, has become a practical problem that urgently needs to be solved in the sampling technology of concentration settling tanks. Utility Model Content

[0003] In view of the above problems, this utility model provides a rotary sampling tube for a concentration settling tank. By enabling the inner bend tube to rotate 360 ​​degrees inside the tank, the sampling point can be flexibly selected and precisely positioned, solving the problem of insufficient sample representativeness caused by the fixed sampling tube due to its non-adjustable position.

[0004] To achieve the above objectives, this application provides a rotary sampling tube for a concentration settling tank. The tube is suitable for concentration settling tanks, with a sampling port on the side wall of the tank body. The rotary sampling tube includes a sterile flange, a sleeve, a connecting tube, an inner bend, and a rotating assembly. The sterile flange is positioned on the sampling port. The sleeve is positioned inside the sterile flange and is sterilely and sealed to the tank body via the flange. The connecting tube is positioned inside the sleeve, with one end of the connecting tube positioned outside the tank body and the other end penetrating the sleeve and positioned inside the tank body. The connecting tube can rotate relative to the sleeve. The inner bend is airtightly connected to the other end of the connecting tube, with the other end extending towards the inside of the tank body. The inner bend can rotate under the influence of the connecting tube. The rotating assembly is positioned at the connection between the connecting tube and the sleeve.

[0005] In some embodiments, the rotating assembly includes a bearing housing, a bearing, and a pressure plate. The bearing is sleeved on the outside of the connecting pipe and embedded in the bearing housing. The pressure plate is sleeved on the connecting pipe, and a bearing is provided between the pressure plate and the bearing housing.

[0006] In some embodiments, the number of bearings is two.

[0007] In some embodiments, the bearing housing includes a first connecting section, a second connecting section, and a third connecting section arranged sequentially along the axial direction; the first connecting section is sleeved around the port of the sleeve; the second connecting section contains a bearing; the third connecting section has a threaded hole, and the pressure plate and the bearing housing are connected to the third connecting section by bolts.

[0008] In some embodiments, the end of the connecting pipe that protrudes to the outside of the tank is provided with an annular groove; the inner side of the pressure plate is provided with an annular flange, which is adapted to the annular groove so that the pressure plate is partially embedded in the outer wall of the connecting pipe.

[0009] In some embodiments, the rotary sampling tube for the concentration settling tank further includes a connecting valve, which is airtightly connected to one end of the connecting tube that protrudes to the outside of the tank.

[0010] In some embodiments, the rotary sampling tube for the concentration settling tank further includes at least one gasket, which is sleeved around the outer periphery of the connecting tube and disposed at the connection between the connecting tube and the sleeve.

[0011] In some embodiments, at least one washer receiving groove is provided on the inner side of the sleeve; the washer is placed in the washer receiving groove.

[0012] In some embodiments, the extension trend of the inner bend is J-shaped; or, the extension trend of the inner bend is L-shaped.

[0013] In some embodiments, the connecting tube is configured as a sanitary quick-connect fitting.

[0014] Unlike existing technologies, the above technical solution provides a rotary sampling tube for concentration settling tanks, suitable for concentration settling tanks with sampling holes on the side wall of the tank. The rotary sampling tube includes a sterile flange mounted on the sampling hole and a sleeve that is sterilely and sealed to the tank body via the sterile flange. A connecting tube is located inside the sleeve and can rotate relative to the sleeve, with one end positioned outside the tank body and the other end penetrating the sleeve and positioned inside the tank body. An inner bend is airtightly connected to the other end of the connecting tube and extends into the tank body, rotating under the influence of the connecting tube. A rotating assembly is located at the connection between the connecting tube and the sleeve, rotating the connecting tube to drive the inner bend to rotate 360 ​​degrees within the tank. Operators can flexibly select the optimal sampling position based on observation, effectively avoiding localized sedimentation areas, significantly improving the representativeness and accuracy of the sampling, solving the problem of sampling distortion caused by the non-adjustable position of fixed sampling tubes, while maintaining the sterile and sealed state of the tank body.

[0015] The above description of the utility model is merely an overview of the technical solution of this utility model. In order to enable those skilled in the art to better understand the technical solution of this utility model and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this utility model easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this utility model. Attached Figure Description

[0016] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the present invention and other related contents, and should not be considered as limitations on the present invention.

[0017] In the accompanying drawings of the instruction manual:

[0018] Figure 1 This is a schematic diagram of the specific structure of the rotating sampling tube described in the specific implementation method;

[0019] Figure 2 This is a cross-sectional structural diagram of the rotating sampling tube described in a specific embodiment;

[0020] Figure 3 This is a partial cross-sectional structural diagram of the rotating sampling tube described in a specific embodiment;

[0021] Figure 4 This is a schematic diagram of the main structure of the rotating sampling tube described in a specific embodiment.

[0022] The reference numerals used in the above figures are explained as follows:

[0023] 1. Aseptic flange;

[0024] 2. Sleeve;

[0025] 3. Connecting pipe;

[0026] 4. Inner bend pipe;

[0027] 5. Rotating component;

[0028] 51. Bearing housing;

[0029] 52. Bearings;

[0030] 53. Pressure plate;

[0031] 6. Washers. Detailed Implementation

[0032] To illustrate in detail the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this utility model, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this utility model and are therefore intended to limit the scope of protection of this utility model.

[0033] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0034] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0035] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0036] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0037] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0038] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0039] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0040] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0041] Please see Figures 1 to 4 This embodiment provides a rotary sampling tube for a concentration settling tank. The tank has a sampling hole on its side wall. The rotary sampling tube includes a sterile flange 1, a sleeve 2, a connecting tube 3, an inner bend 4, and a rotating assembly 5. The sterile flange 1 is positioned on the sampling hole. The sleeve 2 is positioned inside the sterile flange 1 and is sterilely sealed to the tank body via the sterile flange 1. The connecting tube 3 is positioned inside the sleeve 2, with one end of the connecting tube 3 positioned outside the tank body and the other end penetrating the sleeve 2 and positioned inside the tank body. The connecting tube 3 can rotate relative to the sleeve 2. The inner bend 4 is airtightly connected to the other end of the connecting tube 3, and the other end of the inner bend 4 extends towards the inside of the tank body. The inner bend 4 can rotate under the influence of the connecting tube 3. The rotating assembly 5 is positioned at the connection between the connecting tube 3 and the sleeve 2.

[0042] In this embodiment, the rotating sampling tube is fixed to the sampling port on the side wall of the concentration settling tank via a sterile flange 1, forming a sterile, sealed connection with the tank body. The sleeve 2 serves as a fixed channel penetrating the sterile flange 1, providing support and guidance for the internal rotating components. The connecting pipe 3 is disposed within the sleeve 2 and can rotate 360 ​​degrees relative to the sleeve 2, enabling spatial selectivity in the sampling operation. The airtight connection between the inner bend 4 and the connecting pipe 3 ensures no leakage during rotation, and its design extending into the tank body allows the sampling port to penetrate deep into the material layer. The rotating assembly 5, as a key transmission mechanism, is located at the connection between the connecting pipe 3 and the sleeve 2, providing stable mechanical support for the rotational movement.

[0043] Specifically, the aseptic flange 1 adopts a sanitary flange connection structure to ensure complete isolation between the sterile environment inside the tank and the outside world. The sleeve 2, as a static support component, maintains an appropriate gap between its inner wall and the outer wall of the connecting pipe 3, ensuring smooth rotation while preventing material residue. The rotating function of the connecting pipe 3 enables the inner bend 4 to perform omnidirectional scanning within the tank. Operators can adjust the orientation of the sampling port inside the tank by rotating the outer pipe section. The bending design of the inner bend 4 allows its sampling port to avoid the tank wall boundary layer and sedimentation dead zones. When the inner bend 4 rotates with the connecting pipe 3, its end opening moves in three-dimensional space, forming a spherical scanning trajectory. The rotating assembly 5 achieves smooth transmission through a precision bearing 52 structure, ensuring a stable sealing state during rotation. Preferably, the rotating assembly 5 uses a deep groove ball bearing 52 with a dedicated sealing structure, ensuring both rotational flexibility and system sealing.

[0044] During the operation of a thickening and settling tank, the material inside the tank forms a typical stratified structure: a clarified liquid layer at the top, a suspended slurry layer in the middle, and a thickened sediment layer at the bottom. Due to the influence of fluid dynamics, the distribution of solid particles at the same horizontal level is often uneven, and there may be localized sedimentation enrichment zones formed by eddy current effects, tank wall effects, or dead zones in the stirring.

[0045] This embodiment overcomes the shortcomings of traditional fixed sampling tubes, which, due to their fixed sampling port orientation, can only obtain samples from a single direction and are prone to obtaining non-representative samples. It achieves 360-degree omnidirectional rotational sampling. When the operator rotates the connecting tube 3, the precision transmission of the rotating component 5 drives the inner bend tube 4 to smoothly rotate 360 ​​degrees within the tank. This rotation process allows the sampling port at the end of the inner bend tube 4 to perform a complete circular motion on the horizontal plane. Simultaneously, thanks to the specific bending angle of the inner bend tube 4, the sampling port also undergoes a corresponding positional change in the vertical direction, forming a three-dimensional sampling trajectory. The operator can observe the changes in the clarity of the initially flowing sample and adjust the sampling port orientation in real time to accurately locate the clearest and most representative area at that level for sampling. This ability to dynamically select sampling points fundamentally solves the sampling distortion problem caused by the non-adjustable position of fixed sampling tubes, ensuring that each sample accurately reflects the material state at that height level.

[0046] The rotating sampling tube in this embodiment overcomes the positional limitations of traditional fixed sampling tubes through its 360-degree rotation function, allowing operators to flexibly select the optimal sampling point based on real-time observation, significantly improving the representativeness and accuracy of the sampling. During rotation, the movement trajectory of the inner bend 4 covers a larger sampling area, effectively avoiding sedimentation dead zones caused by fluid dynamics factors, ensuring that the obtained sample truly reflects the material state at that height level. The entire rotating mechanism achieves reliable operation while maintaining the aseptic seal of the tank, meeting the stringent hygiene requirements of industries such as pharmaceuticals and chemicals, while also providing a convenient operating experience, offering reliable technical support for process control and quality management.

[0047] In some embodiments, the rotating assembly 5 includes a bearing housing 51, a bearing 52, and a pressure plate 53. The bearing 52 is sleeved on the outside of the connecting pipe 3 and embedded in the bearing housing 51. The pressure plate 53 is sleeved on the connecting pipe 3, and the bearing 52 is provided between the pressure plate 53 and the bearing housing 51.

[0048] In this embodiment, the bearing 52, as a core rotating component, is sleeved outside the connecting pipe 3. Its inner ring is interference-fitted with the connecting pipe 3, and its outer ring is precisely fitted with the bearing housing 51, forming a stable rotational support structure. The bearing housing 51, as a load-bearing shell, not only provides precise positioning and installation space for the bearing 52, but also effectively distributes the radial load generated during rotation to the fixed component through its rigid structure. The pressure plate 53 is located on the outside of the bearing 52, and through its cooperation with the bearing housing 51, it axially presses and fixes the bearing 52, preventing axial movement of the bearing 52 during operation.

[0049] Preferably, the bearing 52 is a deep groove ball bearing 52, whose compact structure and low coefficient of friction make it particularly suitable for sampling operations requiring frequent manual rotation. The bearing housing 51 can be designed as a split structure to facilitate the installation and maintenance of the bearing 52; at the same time, a sealing groove is provided at its connection with the sleeve 2, and a sealing ring can be installed to further enhance the sealing effect. An appropriate gap is maintained between the inner hole of the pressure plate 53 and the connecting pipe 3 to ensure that the clamping effect of the pressure plate 53 is not affected by rotation, and to avoid creating additional resistance to the rotation of the connecting pipe 3.

[0050] The rotating assembly 5 achieves smooth rotation of the connecting pipe 3 through the precise fit of the bearing 52. The bearing seat 51 provides a stable support foundation, while the pressure plate 53 ensures that the entire rotating mechanism maintains a stable working state during long-term use. When the operator rotates the connecting pipe 3, the bearing 52 minimizes rotational friction, allowing the inner bend 4 to easily achieve 360-degree omnidirectional rotation within the tank. This allows for precise adjustment of the sampling port orientation, effectively avoiding sedimentation enrichment areas and obtaining the most representative sample. This not only ensures the flexibility and accuracy of sampling operations but also guarantees the service life and stability of the equipment through a reliable mechanical structure, providing key technical support for accurate sampling in concentration settling tanks.

[0051] In some embodiments, the number of bearings 52 is two.

[0052] In this embodiment, the rotating assembly 5 adopts a dual-bearing configuration 52. The two bearings 52 are arranged axially spaced along the connecting pipe 3, forming a stable two-point support structure, which effectively enhances the radial stability of the connecting pipe 3 during rotation. When the connecting pipe 3 drives the inner bend pipe 4 to rotate 360 ​​degrees inside the tank, the dual bearings 52 share the radial load, preventing the connecting pipe 3 from swaying or deflecting during rotation.

[0053] Preferably, both bearings 52 can be standard deep groove ball bearings of the same model to reduce maintenance costs and replacement difficulty. The installation positions of the two bearings 52 within the bearing housing 51 are precisely calculated to ensure that they provide sufficient support span without excessively increasing rotational resistance.

[0054] By employing a dual-bearing configuration 52, the rotating assembly 5 significantly improves mechanical stability while maintaining flexible rotation. When the operator rotates the connecting pipe 3 to adjust the sampling position, the dual bearings 52 work together to effectively suppress any swaying that may occur due to the long length of the inner bend pipe 4, ensuring that the sampling port maintains a stable trajectory during rotation. This embodiment makes the 360-degree rotation operation smoother and more reliable, avoiding sampling position errors caused by component shaking, further ensuring the accuracy and representativeness of the sampling, and providing reliable mechanical assurance for obtaining samples that truly reflect the state of the material inside the tank.

[0055] In some embodiments, the bearing housing 51 includes a first connecting section, a second connecting section and a third connecting section arranged sequentially along the axial direction; the first connecting section is sleeved around the port of the sleeve 2; the second connecting section is provided with a bearing 52; the third connecting section is provided with a threaded hole, and the pressure plate 53 is bolted to the bearing housing 51 on the third connecting section.

[0056] In this embodiment, the bearing housing 51 adopts a segmented structure design, with a first connecting segment, a second connecting segment, and a third connecting segment arranged sequentially along the axial direction. The first connecting segment is fitted around the port of the sleeve 2 by a tight fit, forming a reliable connection with the fixed component and ensuring the overall stability of the rotating assembly 5. The second connecting segment serves as the receiving cavity for the bearing 52, with its inner diameter precisely matching the outer diameter of the bearing 52, providing accurate positioning and installation space for the bearing 52. The third connecting segment is provided with threaded holes, and the pressure plate 53 and the bearing housing 51 are fixedly assembled by bolt connection.

[0057] Preferably, a sealing groove can be provided on the inner wall of the first connecting section and an O-ring can be installed to enhance the sealing performance of the connection with the sleeve 2. The bearing 52 mounting part of the second connecting section can be designed with a stepped structure to facilitate the axial positioning and installation of the bearing 52. The threaded holes of the third connecting section adopt a uniformly distributed design to ensure that the pressure plate 53 is subjected to uniform force and to avoid the bearing 52 from being misaligned due to unilateral clamping.

[0058] This embodiment achieves clear functional zoning through a segmented bearing housing 51 structure: the first connecting segment is responsible for basic connection, the second connecting segment provides the core support function of the bearing 52, and the third connecting segment provides a convenient assembly interface. When assembling the rotating component 5, the bearing 52 is first installed into the second connecting segment, and then the pressure plate 53 is pressed together through the bolt connection of the third connecting segment. Finally, the entire assembly is fixed to the sleeve 2 through the first connecting segment. This not only simplifies the assembly process but also improves the interchangeability and maintenance convenience of each component, providing a reliable structural guarantee for the long-term stable operation of the rotating sampling tube.

[0059] In some embodiments, the end of the connecting pipe 3 that protrudes to the outside of the tank is provided with an annular groove; the inner side of the pressure plate 53 is provided with an annular flange, which is adapted to the annular groove so that the pressure plate 53 is partially embedded in the outer wall of the connecting pipe 3.

[0060] In this embodiment, an annular groove is machined at one end of the connecting pipe 3 that protrudes to the outside of the tank. The annular groove is continuously distributed along the circumference of the connecting pipe 3 to form a complete annular structure. An annular flange is correspondingly provided on the inner side of the pressure plate 53. Its shape and size are precisely matched with the annular groove of the connecting pipe 3, so that the pressure plate 53 can be partially embedded in the outer wall of the connecting pipe 3.

[0061] The depth of the annular groove is precisely calculated to ensure sufficient embedding depth for reliable axial positioning while avoiding excessive weakening of the wall thickness of the connecting pipe 3. Preferably, the annular flange can adopt a progressive design with a chamfer or fillet at its inlet end for easy automatic alignment during assembly; the mating surfaces of the annular groove and the annular flange can be precision machined to ensure a smooth and flat contact surface and reduce frictional resistance.

[0062] In this embodiment, the groove-flange mating structure, while pressing the bearing 52 with the pressure plate 53, also achieves circumferential linkage between the pressure plate 53 and the connecting pipe 3. When the operator rotates the connecting pipe 3 to adjust the sampling position, the pressure plate 53 rotates synchronously with the connecting pipe 3 through the mating of the annular flange and the annular groove. This avoids relative rotational friction between the pressure plate 53 and the connecting pipe 3, ensuring both the assembly stability of the rotating assembly 5 and the smoothness of the 360-degree rotation operation. It also prevents wear problems caused by relative movement between components, significantly improving the service life of the rotating sampling tube and the user experience.

[0063] In some embodiments, the rotary sampling tube for the concentration settling tank further includes a connecting valve, which is airtightly connected to one end of the connecting tube 3 that protrudes to the outside of the tank.

[0064] In this embodiment, the connecting valve is airtightly connected to the connecting pipe 3 via a sanitary quick-connect interface, forming a complete fluid control path. As the actuator for the sampling operation, the opening and closing state of the connecting valve directly controls the communication between the material inside the tank and the outside world.

[0065] Preferably, the connecting valve is a sanitary diaphragm valve with a smooth flow channel and no dead corners, which meets the GMP requirements for the cleanliness of pharmaceutical equipment; a sealing gasket can be installed at the connection between the connecting valve and the connecting pipe 3 to ensure a reliable seal during rotation and opening / closing; the operating handle of the connecting valve is designed in accordance with ergonomics, which makes it easy for operators to quickly control the sampling after adjusting the sampling position.

[0066] The connection valve makes the sampling operation more standardized and safer. Once the operator finds the optimal sampling position by rotating the connecting pipe 3, they can simply open the connection valve to begin sampling, and close the valve to immediately terminate the sampling process. This embodiment avoids the inconvenience of frequently disassembling connecting components required in traditional sampling methods, ensuring sampling efficiency while minimizing the risk of external contamination. Simultaneously, the connection valve facilitates online cleaning and sterilization of the sampling system, ensuring that the entire sampling process meets hygiene standards.

[0067] In some embodiments, the rotary sampling tube for the concentration settling tank further includes at least one gasket 6, which is sleeved around the connecting tube 3 and disposed at the connection between the connecting tube 3 and the sleeve 2.

[0068] In this embodiment, at least one gasket 6 is provided at the connection between the connecting pipe 3 and the sleeve 2 of the rotating sampling tube. The gasket 6 is sleeved around the connecting pipe 3 and located in the fitting gap between the two components. As a sealing element, the gasket 6 mainly fills the assembly gap between the connecting pipe 3 and the sleeve 2 to prevent the liquid in the tank from leaking outward along the rotation axis.

[0069] Preferably, gasket 6 can be made of food-grade silicone or fluororubber, which has good chemical stability and elastic recovery properties. The number of gaskets 6 can be flexibly configured according to sealing requirements; three gaskets 6 can be used to form multiple sealing lines, significantly improving sealing reliability. The cross-section of gasket 6 can be designed as O-shaped or X-shaped to adapt to sealing requirements under different working conditions.

[0070] When the operator rotates the connecting pipe 3 to adjust the sampling position, the gasket 6 forms an effective dynamic seal through close contact with the outer wall of the connecting pipe 3 and the inner wall of the sleeve 2. Even after long-term use, the elastic properties of the gasket 6 can maintain sufficient sealing pressure, ensuring a reliable seal throughout 360-degree rotation. The sealing design of this embodiment not only prevents leakage of materials inside the tank but also prevents external contaminants from entering the tank, providing important protection for a sterile sampling environment.

[0071] In some embodiments, the inner side of the sleeve 2 is provided with at least one washer receiving groove; the washer 6 is placed in the washer receiving groove.

[0072] In this embodiment, a washer receiving groove is specially provided on the inner side of the sleeve 2 for precise installation and positioning of the washer 6. The washer receiving groove is an annular groove machined on the inner wall of the sleeve 2, and its shape and size match the outer contour of the washer 6, providing a stable installation position for the washer 6. The washer 6 is precisely placed in the receiving groove, and the correct working position is maintained by the limiting effect of the groove wall.

[0073] Preferably, the depth of the gasket receiving groove is slightly less than the cross-sectional diameter of the gasket 6, ensuring that the gasket 6 can protrude appropriately from the groove surface after installation and form an effective sealing contact with the outer wall of the rotating connecting pipe 3; the edge of the gasket receiving groove can be designed with rounded corners to avoid sharp corners damaging the gasket 6; multiple gasket receiving grooves can be equidistantly distributed along the axial direction of the sleeve 2, with one gasket 6 installed independently in each groove, forming a multi-seal structure.

[0074] The gasket receiving groove ensures the stability of the gasket 6 during the rotation of the connecting pipe 3. When the connecting pipe 3 rotates 360 degrees, the gasket 6 remains in a fixed position within the receiving groove, with only the sealing lip moving relative to the outer wall of the connecting pipe 3. The limiting effect of the receiving groove prevents the gasket 6 from shifting or twisting during long-term use, ensuring durable and reliable sealing performance. At the same time, this structure facilitates the replacement and maintenance of the gasket 6; simply removing the old gasket 6 from the receiving groove and inserting a new gasket 6 completes the replacement of the sealing element.

[0075] In some embodiments, the extension trend of the inner bend 4 is J-shaped; or, the extension trend of the inner bend 4 is L-shaped.

[0076] In this embodiment, the extension trend of the inner bend 4 provides two optimized configuration options. The J-shaped inner bend 4 has a smooth arc transition, and its sampling port orientation forms a natural angle change with the axis of the connecting pipe 3, similar to the shape of the letter "J". The L-shaped inner bend 4 adopts a right-angle bend design, and the sampling port direction is perpendicular to the axis of the connecting pipe 3 at 90 degrees.

[0077] Preferably, the bending radius of the J-shaped configuration is optimized by hydrodynamics to reduce material flow resistance and prevent particulate matter from depositing at the bend; the L-shaped configuration has a more compact structure and is suitable for use inside tanks with limited space. Both configurations are precisely bent to ensure a smooth inner wall, avoiding the formation of cleaning dead zones.

[0078] When the connecting pipe 3 drives the inner bend pipe 4 to rotate 360 ​​degrees, the J-shaped sampling port moves along an inclined circular trajectory, scanning in the horizontal plane and producing vertical positional changes. The L-shaped sampling port, on the other hand, moves in a circle within a strictly vertical plane, maintaining a constant sampling depth. Both configurations effectively avoid the problem of the sampling port being directly facing the tank wall or sediment layer. Through rotational motion, the sampling port can actively seek the optimal sampling area, significantly improving the accuracy and representativeness of the sampling and providing a flexible solution for sampling needs under different operating conditions.

[0079] In some embodiments, the connecting pipe 3 is configured as a sanitary quick-connect fitting.

[0080] In this embodiment, the connecting pipe 3 adopts a sanitary quick-connect structure, which is a quick-connect device that conforms to GMP standards. The quick-connect is used to achieve quick connection and disconnection through a snap-fit ​​or threaded locking mechanism, and its internal flow channel is specially designed to ensure no dead corners, facilitating thorough cleaning and sterilization.

[0081] Preferably, the quick-connector is made of stainless steel with an electropolished surface to meet the surface finish requirements of sanitary equipment; the sealing surface of the connector uses a food-grade rubber or silicone sealing ring to ensure reliable sealing while avoiding the risk of contamination.

[0082] When the operator rotates the connecting pipe 3 to adjust the sampling position 360 degrees, the quick-connect coupling provides a convenient external operating interface. After sampling, the sampling pipeline can be quickly disconnected simply by loosening the quick-connect coupling, greatly simplifying the operation process. This not only improves sampling efficiency but also minimizes the risk of cross-contamination, ensuring that the entire sampling process meets stringent hygiene standards.

[0083] By adopting the above technical solution, this utility model differs from the prior art and has the following beneficial effects: Through the 360-degree rotation capability of the connecting pipe 3 relative to the sleeve 2, the inner bend pipe 4 can achieve omnidirectional scanning sampling within the tank. Operators can flexibly adjust the orientation of the sampling port based on real-time observation, accurately locating the clearest and most representative area for sampling. During rotation, the sampling port at the end of the inner bend pipe 4 performs a complete circular motion on the horizontal plane, while simultaneously changing position in the vertical direction due to its curved configuration, forming a three-dimensional sampling trajectory, effectively avoiding localized sedimentation enrichment areas caused by fluid dynamics factors. The above technical solution fundamentally solves the sampling distortion problem caused by the non-adjustable position of fixed sampling tubes, ensuring that each sampling accurately reflects the material state at that height level. Simultaneously, the entire rotating mechanism achieves reliable operation while maintaining the aseptic seal of the tank, meeting the stringent hygiene requirements of industries such as pharmaceuticals and chemicals, and providing reliable technical support for process control through its stable mechanical structure and convenient operation.

[0084] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this utility model, this should not limit the scope of patent protection of this utility model. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this utility model and utilizing the content described in the text and drawings of this utility model, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this utility model.

Claims

1. A rotary sampling tube for a concentration settling tank, characterized in that, Suitable for concentration settling tanks, wherein the tank body side wall is provided with a sampling port, and the rotating sampling tube includes: A sterile flange is installed on the sampling port; A sleeve is disposed inside the aseptic flange, and the sleeve is aseptically and sealed to the tank body through the aseptic flange; A connecting pipe is disposed inside the sleeve, with one end of the connecting pipe placed on the outside of the tank body and the other end of the connecting pipe passing through the sleeve and placed on the inside of the tank body. The connecting pipe can rotate relative to the sleeve. An inner bend is airtightly connected to the other end of the connecting pipe. The other end of the inner bend extends toward the inside of the tank. The inner bend can rotate under the drive of the connecting pipe. A rotating assembly is disposed at the connection between the connecting tube and the sleeve.

2. The rotary sampling tube for a concentration settling tank according to claim 1, characterized in that, The rotating component includes: Bearing housing; The bearing is sleeved on the outside of the connecting pipe and embedded in the bearing housing; A pressure plate is sleeved on the connecting pipe, and the bearing is provided between the pressure plate and the bearing seat.

3. The rotary sampling tube for a concentration settling tank according to claim 2, characterized in that, The number of bearings is two.

4. The rotary sampling tube for a concentration settling tank according to claim 2, characterized in that, The bearing housing includes a first connecting section, a second connecting section, and a third connecting section arranged sequentially along the axial direction; The first connecting segment is sleeved around the port of the sleeve; The bearing is provided within the second connecting section; The third connecting section is provided with threaded holes, and the pressure plate and the bearing seat are connected to the third connecting section by bolts.

5. The rotary sampling tube for a concentration settling tank according to claim 4, characterized in that, The end of the connecting pipe that protrudes to the outside of the tank body is provided with an annular groove; The inner side of the pressure plate is provided with an annular flange, which is adapted to the annular groove so that the pressure plate is partially embedded in the outer wall of the connecting pipe.

6. The rotary sampling tube for a concentration settling tank according to claim 1, characterized in that, Also includes: Connect the valve and make an airtight connection to one end of the connecting pipe that protrudes to the outside of the tank.

7. The rotary sampling tube for a concentration settling tank according to claim 1, characterized in that, Also includes: At least one washer is fitted around the outside of the connecting pipe and is located at the connection between the connecting pipe and the sleeve.

8. The rotary sampling tube for a concentration settling tank according to claim 7, characterized in that, The inner side of the sleeve is provided with at least one washer receiving groove; The washer is placed in the washer receiving groove.

9. The rotary sampling tube for a concentration settling tank according to claim 1, characterized in that, The extension trend of the inner bend is J-shaped; Alternatively, the extension trend of the inner bend is L-shaped.

10. The rotary sampling tube for a concentration settling tank according to claim 1, characterized in that, The connecting pipe is configured as a sanitary quick-connect fitting.

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